WO2024200515A1

WO2024200515A1 - Battery module, aerosol generation device, and method

Info

Publication number: WO2024200515A1
Application number: PCT/EP2024/058260
Authority: WO
Inventors: Claude Zominy
Original assignee: JT International SA
Current assignee: JT International SA
Priority date: 2023-03-28
Filing date: 2024-03-27
Publication date: 2024-10-03
Anticipated expiration: 2025-09-28

Abstract

According to the present disclosure there is provided a battery module for an aerosol generation device comprising: one or more battery module components; and a destructible envelope provided around the one or more battery module components, thereby to at least partially envelop the one or more battery module components, wherein the destructible envelope is configured to be destructed by processing thereof such that access to one or more of the one or more battery module components is enabled.. Also provided is a method of using a battery module of an aerosol generation device.

Description

Battery module, aerosol generation device, and method

The present disclosure relates to a battery module, in particular to a battery module for an aerosol generation device. The present disclosure also relates to an aerosol generation device, in particular to an aerosol generation device comprising a battery module. The present disclosure also relates to a method.

Background

Battery cell recycling is a recycling activity that aims to reduce the number of battery cells being disposed alongside regular household waste. Battery cells contain heavy metals and toxic chemicals and disposing of them by the same process as regular household waste has raised concerns over soil contamination and water pollution. Furthermore, battery cell recycling can help to prevent a future shortage of battery cell materials and to enable a sustainable life cycle of these technologies.

An aerosol generation device is configured to heat an aerosol substrate to generate aerosol for inhalation. An aerosol generation device includes a power supply in the form of a battery cell. The battery cell provides power for operation of the aerosol generation device, and for example may provide the necessary power to generate aerosol.

Battery cells incorporated in aerosol generation devices are currently not readily recyclable. This is often due to difficulties in accessing the battery cell. An example of an existing aerosol generation device consists of a battery cell encapsulated in a solid case, making extraction of the battery cell, and physical separation of other components, a difficult task. Furthermore, dangers associated with extraction of the battery cell include electrical, chemical, and thermal dangers, and their potential interactions.

Many of the same problems are encountered for the more general battery module, which may comprise such a battery cell, and optionally one or more other components. There may be a need to access the cells or one or more components, for servicing, maintenance, and/or recycling.

It is an object of the invention to overcome at least some of the above referenced problems, or problems referenced elsewhere. Summary

According to the present disclosure there is provided a battery module, an aerosol generation device, and method, including the features as set out in the claims.

According to a first aspect of the present invention, there is provided a battery module for an aerosol generation device comprising: one or more battery module components; and a destructible envelope provided around (e.g., about) the one or more battery module components, thereby to at least partially envelop the one or more battery module components, wherein the destructible envelope is configured to be destructed by processing thereof such that access to one or more of the one or more battery module components is enabled.

Advantageously, the envelope provides a protective outer (e.g., alternatively or additionally described as an “outer casing”, “housing”, “surround”, “wrapping”, or the like) to the one or more battery module components, which improves safety in handling of the battery module. Furthermore, this may simplify the provision of access to the one or more battery components, for servicing, maintenance, and/or recycling. As described in detail below, the destructible envelope is particularly advantageous where the battery module comprises a battery cell. During a recycling process, the destruction of the destructible envelope enables access to the one or more battery module components for disassembly, and where the battery module comprises or receives a battery cell, for discharging of the battery cell. Advantageously, this facilitates safe and straightforward extraction and removal of a battery cell from a battery module.

The battery module may be a removable battery module. That is, the battery module may be removable from connection to, or in, the aerosol generation device. Advantageously, this may simplify servicing, maintenance, replacement, and/or recycling of components of the battery module. The battery module may be providable or locatable in, and removable from, the aerosol generation device. The battery module may comprise a housing, or housing portion, which when the battery module is provided in the aerosol generation device closes, or completes, a portion of a housing or the aerosol generation device. Furthermore, as described in greater detail below, the destructible envelope “at least partially enveloping the one or more battery module components” may mean that the destructible envelope completely or fully envelopes or surrounds (e.g., to encapsulate) the one or more battery module components. Alternatively, in a partial enveloping, a region or section of the envelope may be exposed to provide access or connection to one or more components of the one or more battery module components, for example to a connection element as described below. As described further below, “processing” of the envelope may include application of heat or liquid (e.g., solvent) to the destructible envelope. Enabling access to one or more of the one or more battery module components may facilitate the creation of an electrical connection with the one or more components, for example for discharging of a battery cell. Additionally, access may be enabled for removal of one or more battery module components, for example for removal of a battery cell from the battery module for recycling, and enabling replacement of a battery cell in the battery module. The destructible envelope may be provided around the battery cell and the connection element (i.e., the one or more battery module components), and destruction of destructible envelope (e.g., at least initially) may enable access to the connection element (i.e., one of the one or more battery module components).

In one example, the one or more battery module components comprises: a battery cell; and one or more additional battery module components.

Handling of the battery module during a recycling process presents a safety risk to the disassembler (i.e., the person performing disassembly of the battery module, who may otherwise be referred to as an “operator”). It is therefore highly advantageous to provide the destructible envelope about battery module components. Furthermore, the envelope being destructible enables access to the battery module components when the envelope is destructed, which may be at an appropriate or safe time, such as when the battery module components are removed from the aerosol generation device, when the battery module components are not in connection with a battery cell, or when the battery cell is discharged. Furthermore, the construction is particularly advantageous in protecting the disassembler from handling of a charged battery cell during a recycling process.

The one or more battery module components may be non-destructible components.

That is, unlike the destructible envelope which is deliberately configured to be destructed, the one or more battery module components are not deliberately configured to be destructed. The one or more battery module components may destruct at a significantly lesser rate, or not at all, under the same conditions to which the destructible envelope is exposed. For example, the one or more battery module components may not dissolve or be destructed in a solvent, whilst the destructible envelope will dissolve or be destructed in the same solvent. Specifically, the battery cell may be one example of a non-destructible component. Other non-destructible components may include one or more contacts and/or connection elements.

In one example, the one or more battery module components comprises a battery cell and a connection element in electrical connection with the battery cell, wherein the destructible envelope is configured to be destructible by application of heat or liquid thereto to cause mechanical degradation of the destructible envelope.

Advantages of providing a battery cell and connection element will be appreciated from the above. Furthermore, by the destructible envelope being configured to be destructible by application of heat or liquid thereby to cause mechanical degradation of the destructible envelope, further advantages are realised. In this way, access to the battery cell and/or connection element is provided, but access may be provided in a safe and controlled manner. The destructible envelope may provide a level of protection to the user until an appropriate time, following which the components can then be accessed due to degradation of the envelope, enabling recycling and replacement of battery module components.

In one example, a connection element connects to the one or more battery module components. In one example, the connection element is one of the one or more battery module components.

In this way, the connection element may provide a connection to the battery module components. Accessing the connection element facilitates discharging and disassembly of the battery module. Furthermore, accessing the connection element facilitates discharging and disassembly of the battery module in a safe and controlled manner.

In one example, the envelope is provided about the connection element. Disassembler safety is thereby improved, by protecting the connection element from accidental or inadvertent contact by the disassembler. The connection element may be or provide an electrical connection. Furthermore, destructing the envelope at the connection element may facilitate disassembly of the battery module in a safe and controlled manner. In a highly advantageous example, destructing the envelope at the connection element may facilitate discharging of the battery cell and disassembly of the battery module in a safe and controlled manner. Highly advantageously, the connection element may be accessed prior to accessing one or more other battery module components, in particular the battery cell.

In one example, the battery module is accessible at a first region of the envelope to facilitate discharging of the battery cell.

In this way, the first region may enable discharging of the battery cell, whilst one or more other regions of the envelope may still provide a protective layer or casing. Disassembler safety is thereby improved during discharging and disassembly of the battery module.

In one example, the connection element is accessible at the first region.

A connection (e.g., an electrical connection) with the battery cell may thereby be formed, via the first region. The battery cell may thereby be discharged whilst it is still protected by the envelope in regions other than the first region. Following discharging, the battery cell can then be accessed by the disassembler in a safe and controlled manner.

In one example, the destructible envelope is configured to be more readily destructible at a first region of the envelope for enabling access to the connection element than at a second region of the envelope for enabling access to the battery cell.

In this way, the connection element is more readily accessible than the battery cell, which, as described in greater detail below, facilitates a discharging operation to be performed prior to the battery cell being exposed or accessible. In this way, safety of the disassembly process is improved. In one example, the envelope is provided about the connection element, and the connection element is accessible at a first region of the envelope for enabling access to the connection element to discharge the battery cell.

In one example, the connection element is exposed at the first region of the envelope.

In this way, disassembler safety may be ensured, as they may only be exposed to the electrical circuit at the first region. The connection element may be exposed at the first region of the envelope when the envelope is destructed, or at a certain time during destruction of the envelope.

In one example, the first region of the envelope has a first characteristic, and a second region of the envelope has a second characteristic, the first characteristic and second characteristic being such that the envelope has a higher destruction attribute at the first region of the envelope than at the second region of the envelope.

The characteristic may be any characteristic of the material that relates to the ability of, or readiness of, the material to destruct. For example, the characteristic may be a choice of material, bonding agent, material thickness, and/or any other suitable characteristic. In this context, the important feature is that the first region of the envelope can be destructed more easily and/or earlier than the second region of the envelope can be destructed. This allows discharging of the battery cell via forming an electrical connection with the connection element, prior to the envelope region at the battery cell being destructed. Highly advantageously, this means that the battery cell can be discharged whilst it is still covered by the envelope.

The destruction attribute may be a speed or ease with which the envelope destructs. For example, in the same solution/solvent, a higher destruction attribute at the first region than at the second region means that the first region destructs more quickly or easily (e.g., loses material or structural property more easily) than the second region. That is, a material with a higher destruction attribute will destruct more readily (e.g., quickly or easily) than a material with a lower destruction attribute.

In one example, the first region of the envelope has a first envelope thickness, and a second region of the envelope provided has a second envelope thickness, wherein the second envelope thickness is greater than the first envelope thickness. That is, in one example, the first characteristic is a first envelope thickness, and the second characteristic is a second envelope thickness, wherein the second envelope thickness is greater than the first envelope thickness. The second region of the envelope may be provided at the battery cell.

Highly advantageously, such a construction results in the first region being more readily destructible than the second region. In this way, during destruction, the first region of the envelope may destruct first, to provide access to the connection element to facilitate discharging of the battery cell. Subsequently, the second region of the envelope may destruct, to provide access to the battery cell, which may be partially or fully discharged. Thus, discharging and disassembly of the battery module can be performed in a safe and controlled manner.

In one example, the first region of the envelope comprises a first envelope material, and a second region of the envelope comprises a second envelope material, wherein the first envelope material has a greater destruction speed than the second envelope material in a solvent. That is, in one example, the first characteristic is a first envelope material, and the second characteristic is a second envelope material, wherein the first envelope material has a higher destruction attribute than the second envelope material.

Highly advantageously, such a construction results in the first region being destructed prior to the second region. In this way, the battery cell can be discharged, by virtue of access to the battery module components at the first region, prior to the battery cell at the second region being destructed. Thus, discharging and disassembly of the battery module can be performed in a safe and controlled manner.

In one example, the battery cell is a soft pouch battery, a can cell, or a prismatic cell. Such battery cells are well-suited to incorporation in aerosol generation devices. Furthermore, soft pouch batteries may be liable to damage. Advantageously, the envelope may provide a level of protection to the soft pouch battery.

In one example, the envelope is destructible in a suitable liquid or solution. In one example, the envelope is destructible in a water-based solution or in a salt-water solution. In one example, the water-based solution is water, or water with the addition of one or more additives. In one example, the salt is one or more of NaCI, Na2S, MgSC , Na2SC>4, FeSC , and ZnSC .

Water-based solutions and salt-water solutions are safe to handle by disassemblers. Furthermore, such salt-water solutions provide for discharging (and potentially rapid discharging) of the battery cell through contact of the salt-water solution with components of the battery module. That is, an electrical connection with the battery cell to discharge the battery cell can be by virtue of the solution forming part of an electrical circuit with the battery cell. The discharging and disassembly process can thus be performed safely, quickly, and without manipulation or handling of the battery module during destruction and discharging. That is, the battery module may be simply providable (e.g., immersible) in a solution to destruct a region of the envelope, discharge the battery cell, and destruct a further region of the envelope. This does not require interaction from an operator once the battery module is provided in the solution.

In one example, the envelope is formed of a homogeneous material and/or a fibrous material.

Homogeneous materials may include polylactic acid (PLA), Polyvinyl alcohol (PVA), and/or biopolymers or biodegradable polymers. Such materials may be used to form envelopes by 3D printing. Fibrous materials may include fibre glass, linen, hemp, jute. Such fibrous materials may be recycled materials and/or recyclable materials. Fibrous materials may be bonded, linked, or formed into an envelope using a bonding agent.

In some other examples, the envelope is formed by layered materials or structured materials (e.g., materials with grid-like patterns, which may be regular or irregular). According to a second aspect of the present invention, there is provided an aerosol generation device comprising a battery module according to the first aspect of the present invention.

In this way, an aerosol generation device is provided having an advantageous battery module, enabling safe disassembly and recycling of components of the aerosol generation device.

The aerosol generation device according to the second aspect of the present invention may comprise any or all of the features of the battery module according to the first aspect of the present invention, as desired or as appropriate.

In one example, the aerosol generation device may comprise an assembly for covering one or more components of an aerosol generation device, the assembly comprising: a cover defining: an internal cover side arrangeable to face one or more components; and an external cover side, wherein the cover comprises at least a destructible cover region being destructible to allow access to the one or more components at the internal cover side.

The assembly may be provided toward the exterior of the aerosol generation device, in particular toward the exterior of the device relative to the destructible envelope. The assembly may cover the one or more battery module components. The internal cover side may be arrangeable to face the one or more battery module components having the destructible envelope provided thereabout.

In this way, the cover provides a level of protection during a process of disassembling and recycling of components of the aerosol generation device. Despite this, the cover is readily removable by virtue of being destructible, in order to facilitate disassembly and recycling of the one or more battery module components. Destruction of the cover may facilitate access to, and thereby destruction of, the destructible envelope provided about the one or more battery module components. Furthermore, in some examples, removal of the cover region and discharging of the battery cell may be performable in a single step, without handling of electrical components by the disassembler.

In one example, the aerosol generation device may comprise an assembly for covering one or more components of an aerosol generation device, the assembly comprising: a cover defining: an internal cover side arrangeable to face one or more components; and an external cover side, the assembly further comprising: one or more contacts configured to be electrically connected to a battery cell, wherein the one or more contacts form part of a discharge circuit for discharging the battery cell, and wherein the one or more contacts are accessible at the external cover side such that an electrical connection can be formed with the battery cell, and the cover may comprise a destructible cover region, or be a destructible cover. In one example, the cover comprises a dissolvable cover region, or is a dissolvable cover. Dissolving is an example of destructing the cover region or cover.

By such a construction, an electrical connection can be formed with the battery cell via the one or more contacts at the external cover side. This enables battery cell discharging without exposure to, or handling of, a charged battery cell by a disassembler (i.e., the person performing disassembly of the aerosol generation device, who may otherwise be referred to as an “operator”). Safety of the disassembly process and recycling process is thus improved. Furthermore, the cover provides a level of protection to the disassembler if the battery cell were to explode or disintegrate, for example during a discharging process. Subsequent to discharging, the cover may be removed (by destructing), which it is then safe to do as the battery cell has been discharged. Once the cover is destructed, it is possible to readily access the battery cell at the appropriate or required time. This may enable access to the destructible envelope about the one or more battery module components, to destruct said destructible envelope.

Furthermore, in at least one example, such a construction facilitates direct connection of the one or more contacts with the battery cell (e.g., not via a PCB of the aerosol generation device) which may enhance reusability of the components of the aerosol generation device.

The discharge circuit may be configured to enable discharging of the battery cell. The discharge circuit may comprise the battery cell, connection elements, and contacts. Other components may be provided, such as one or more PCBs or protection elements (e.g., fuses). However, these components do not form part of a charging circuit. The discharge circuit may passively or actively manage the discharge of the battery cell. The discharge circuit may bypass or avoid use of one or more components of the aerosol generation device, for example one or more components of a charging circuit. It will be appreciated that the one or more contacts may be distinct from charging contacts of the aerosol generation device. Examples of conventional aerosol generation devices comprise contacts for a charging circuit, and components that are implemented to manage the charging of a battery cell. However, the one or more contacts are not charging contacts, and are instead contacts specifically utilised for discharging the battery cell.

According to a third aspect of the present invention, there is provided a method of using a battery module of an aerosol generation device, the battery module comprising: one or more battery module components; and a destructible envelope provided around the one or more battery module components, thereby to at least partially envelop the one or more battery module components, wherein the destructible envelope is configured to be destructed by processing thereof, the method comprising: destructing the destructible envelope, thereby to enable access to one or more of the one or more battery module components.

In this way, a method of recycling battery module components, in particular a battery cell, is provided, wherein recycling can be carried out in a safe and controlled manner.

The method may be a method of recycling or replacing a battery module or an aerosol generation device.

The method according to the third aspect of the present invention may comprise any or all of the features of the battery module according to the first aspect of the present invention and/or any or all of the features of the aerosol generation device according to the second aspect of the present invention, as desired or as appropriate.

In one example, the method comprises: destructing the destructible envelope subsequent to discharging a battery cell of the one or more battery module components. In one example, the method comprises dissolving the destructible envelope subsequent to discharging a battery cell of the battery module, or of the one or more battery module components.

In this way, disassembler safety is improved, and risk of exposure to a charged battery cell is mitigated. In one example, the method comprises: discharging the battery cell by accessing the battery module at a first region of the destructible envelope.

In this way, disassembler safety is improved, and risk of exposure to a charged battery cell is mitigated.

In one example, the method comprises: discharging the battery cell by accessing a connection element connected to the battery cell; and destructing the destructible envelope provided about the battery cell subsequent to discharging the battery cell. In one example, the method comprises discharging the battery cell by accessing a connection element connected to the battery cell; and dissolving the destructible envelope provided about the battery cell subsequent to discharging the battery cell.

In this way, disassembler safety is improved, and risk of exposure to a charged battery cell is mitigated. Specifically, accessing the connection element to discharge the battery cell prevents the disassembler handling a charged battery cell. Instead, the method is a controlled one, in which a discharging step can be performed initially, and the battery cell only being accessible prior to discharging of the battery cell. Safe recycling of the battery module components is thus facilitated.

Brief Description of the Drawings

Examples of the present disclosure will now be described with reference to the accompanying drawings.

Figure 1 shows an aerosol generation device;

Figure 2 shows a battery module;

Figure 3 shows a battery module;

Figure 4 shows a schematic aerosol generation device; and

Figure 5 shows a method.

Detailed Description

As used herein, the term “aerosol precursor material”, “vapour precursor material” or “vaporizable material” are used synonymously and may refer to a material and/or composition, which may for example comprise nicotine or tobacco and a vaporising agent. The aerosol precursor material is configured to release an aerosol when heated or otherwise mechanically stimulated (such as by vibrations). Tobacco may take the form of various materials such as shredded tobacco, granulated tobacco, tobacco leaf and/or reconstituted tobacco. Nicotine may be in the form of nicotine salts. Suitable vaporising agents include: a polyol such as sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol; a non-polyol such as monohydric alcohols, acids such as lactic acid, glycerol derivatives, esters such as triacetin, triethylene glycol diacetate, triethyl citrate, glycerin or vegetable glycerin. In some examples, the aerosol precursor material is substantially a liquid that holds or comprises one or more solid particles, such as tobacco. An aerosol generation device is configured to aerosolise an aerosol precursor material without combustion in order to facilitate delivery of an aerosol to a user. Furthermore, and as is common in the technical field, the terms “vapour” and “aerosol”, and related terms such as “vaporize”, “volatilize” and “aerosolise”, may generally be used interchangeably.

As used herein, the term “aerosol generation device” is synonymous with “aerosol generating device” or “device” may include a device configured to heat an aerosol precursor material and deliver an aerosol to a user. The device may be portable. “Portable” may refer to the device being for use when held by a user. The device may be adapted to generate a variable amount of aerosol, which can be controlled by a user input.

As used herein, the term “aerosol” may include a suspension of vaporizable material as one or more of: solid particles; liquid droplets; gas. Said suspension may be in a gas including air. Aerosol herein may generally refer to/include a vapour. Aerosol may include one or more components of the vaporizable material.

Referring to Figure 1 , a battery module 10 is shown. The battery module 10 is for an aerosol generation device 100. The battery module 10 comprises one or more battery module components 110. The battery module 10 comprises a destructible envelope 120 provided about the one or more battery module components 110.

There are numerous advantages associated with this construction. To recycle the battery module 10, it is often necessary or desired to disassemble the aerosol generation device 100. The destructible envelope 120 enables access to the one or more battery module components 110, as it can be destructed to access the one or more components 110. This may be particularly advantageous during servicing or maintenance of the aerosol generation device, and/or to enable recycling of the one or more battery module components 110. Furthermore, where the one or more battery module components 110 comprises a battery cell, the destructible envelope 120 protects the disassembler (i.e., the person performing disassembly of the battery module, who may otherwise be referred to as an “operator”) from exposure to a battery cell (for example a charged battery cell), or other components. That is, the destructible envelope may prevent access to the battery cell until a time at which it is discharged and no longer dangerous for the disassembler to handle. As described in greater detail herein, the process of destructing the destructible envelope ensures that the battery cell is discharged at a time at which the battery cell is accessible.

Furthermore, the destructible envelope 120 enables safe discharging of the battery cell. The destructible envelope 120 enables safe handling of the battery cell, by ensuring that the battery cell is discharged prior to destruction of the envelope 120. This provides a level of protection in the event of explosion of the battery cell during discharging or at any other time.

Furthermore, the destructible envelope can protect the disassembler in the event of inadvertent disintegration of the battery cell.

Additionally, the destructible envelope facilitates recycling by providing a means for removing or extracting the battery cell (in particular, a discharged battery cell) from the battery module 10. The destructible envelope can be destructed (e.g., partially destructed) to provide access to the battery module 10, or components thereof at a desired time during a recycling process, and additionally can be destructed (e.g., completely) to provide access to the battery cell.

In overview of the present disclosure, a battery module 10 is provided comprising a destructible envelope 120 (e.g., alternatively or additionally described as an “outer casing”, “housing”, “surround”, “wrapping”, or the like) provided around (e.g., about) one or more battery module components 110. The destructible envelope 120 is configured to be destructed by processing thereof such that access to one or more of the one or more battery module components 110 is enabled. In an example, a region of the envelope can be destructed to enable discharging of the battery cell, by connection with the electrical circuit of the battery module 10, whilst ensuring that the battery cell remains at least partially encapsulated within the envelope in order to protect the disassembler of the battery module.

Subsequent to discharging of the battery cell, the remaining envelope can be destructed in order to access the discharged battery cell, thereby enabling safe handling, recycling and disposal of the discharged battery cell. That is, the battery cell may be removed from the battery module 10, or from connection to the battery module 10. The battery cell may be replaced with another component, for example a new battery cell. A destructible envelope may then be applied to the new battery cell and other components of the battery module 10.

Throughout this specification the term “destructible” is used to refer to the nature of the envelope 120. The term “destructible” is used to refer to an envelope which is deliberately configured to be at least partially destructible, for example to lose or degrade one or more of its mechanical properties, or its mechanical integrity (for example hardness or mechanical strength) by appropriate processing. Processing might typically include the application of heat or a liquid, such as water or a solvent, to the envelope. This deliberate configuration may be achieved by the choice of material or materials used to form the destructible envelope 120. However, and as above, the influence of the heat or liquid does not necessarily cause the complete destruction of the envelope. Instead, the envelope may be formed of a destructible material such that the application of heat or a solvent degrades the mechanical properties or integrity of the material. For example, the envelope may soften or weaken, such that it is more easily or readily cut, teared, sheared or broken. That is, the mechanical properties or integrity may be degraded such that it is easier to cut, tear, shear or break the envelope (i.e., in general, more easily access the enveloped battery module), compared with a time prior to the application of heat or solvent. The destructible envelope 120 may be configured or formed of materials suitable to degrade by application of heat, where the required heat to cause degradation is insufficient to cause damage to, or degradation of, other components of the battery module 10. In this way, said other components of the battery module 10 may remain safe to handle by a disassembler, and may remain suitable for recycling or further processing. In a highly advantageous example, the destructible envelope is a dissolvable envelope. That is, dissolving may be an example of destructing the envelope. The envelope may be dissolvable in a water-based solution or in a solvent, or due to application of water or a solvent to the envelope. As with the discussion of the term “destructible”, the envelope may completely or partially dissolve. Partial dissolution may mean that a constituent part of the envelope is dissolved, allowing that part to be more easily removed or manipulated, or for a remaining part of the envelope to be removed, for example peeled away. Dissolving the envelope may comprise immersing the battery module or a portion of it in water or in a solvent.

In an example, the envelope may be formed of fibres (such as natural fibres or glass fibres) and a bonding agent used to bond the fibres to form an envelope having a strong mechanical resistance. The bonding agent may be dissolvable, thereby degrading the mechanical properties of the envelope. The fibres may then be pierced, peeled away, or otherwise removed. Access to battery module components is thereby facilitated.

The destruction of the envelope may occur at room temperature, for example in a solvent at room temperature. Alternatively, the destruction of the envelope may occur by application of heat or a solvent at a temperature of between 50°C and 90°C, and preferably between 70°C and 90°C.

The one or more battery module components 110 comprises, or is, a battery cell 130. The one or more battery module components 110 may further comprise one or more additional battery module components 140.

In an example, the one or more battery module components 110 are non-destructible components. That is, unlike the destructible envelope 120 which is deliberately configured to be destructed, the one or more battery module components 110 are not deliberately configured to be destructed. The one or more battery module components 110 may destruct at a significantly lesser rate, or not at all, under the same conditions to which the destructible envelope 120 is exposed. For example, the one or more battery module components 110 may not dissolve or be destructed in a solvent, whilst the destructible envelope 120 will dissolve or be destructed in the same solvent. Specifically, the battery cell 130 may be one example of a non-destructible component. Other non-destructible components may include one or more contacts and/or connection elements 150. Referring to Figure 2, a cross sectional view through a part of a battery module 10 is shown. In Figure 2, the envelope 120 and battery cell 130 are shown.

It will be appreciated from the description herein that the destructible envelope 120 is particularly advantageous where the one or more battery module components 110 comprise a battery cell 130. This may facilitate servicing, maintenance, replacement, and/or recycling of the battery cell 130. However, it will also be appreciated that a battery cell 130 need not be provided in some examples, and the destructible envelope 120 is still beneficial in enabling access to other aerosol generation device components or other battery module components (such as connection elements, one or more PCBs, one or more IC protection modules) for servicing, maintenance, replacement, and/or recycling of such components.

The battery module 10 may comprise a battery cell 130. Alternatively, the battery module 10 may be configured to receive or house a battery cell 130. That is, in some examples, the battery module 10 need not comprise the battery cell 130.

A connection element 150 connects to the one or more battery module components 110.

The connection element 150 may form part of the electrical circuit of the battery module 10. That is, the connection element 150 may be an electrical connection element, such as a wire or other conductor for carrying electrical current. The connection element 150 may form an electrical connection with the battery cell 130.

In the example illustrated in Figure 2, the envelope 120 is provided about the connection element 150. That is, in the example, the envelope 120 extends fully around the connection element 150 to encapsulate it. This is advantageous in ensuring that the disassembler is protected from the electrical circuit of the battery module 10.

In other examples, the envelope 120 may extend only partly around or along the connection element 150. Thus, there may be an exposed region or section of the connection element 150. As will be explained in greater detail below, this may facilitate discharging of the battery cell 130 without any prior destruction of the envelope 120. The connection element 150 connect may connect to the battery cell 130 and extend away therefrom to connect to other components of the battery module 10, or of the aerosol generation device. For example, the connection element 150 may connect to a printed circuit board (PCB) of the aerosol generation device.

The battery module 10 is accessible at a first region 160 of the envelope 120. The battery module 10 may be accessible at the first region 160 to facilitate, enable, or allow discharging of the battery cell 130.

As will be described in greater detail below, the first region 160 may have a material property or mechanical property, or “characteristic”, to allow access to the battery module 10, in particular to facilitate discharging of the battery cell 130.

Referring to Figure 3, the battery module 10 is shown wherein the battery module 10 is accessible at the first region 160 of the envelope 120. This is due to the destruction of the destructible envelope 120 at the first region 160. The destructible envelope 120 in the first region 160 may be formed from a material that is more readily destructible (e.g., having a mechanical property such that it is more readily destructible) than other regions of the destructible envelope 120. In this way, access can be gained to the electrical circuit of the battery module 10 at the first region 160, prior to the battery cell 130 being exposed due to destruction of the destructible envelope 120 proximal to the battery cell 130.

In other words, as shown in Figures 2 and 3, the envelope 120 is provided about the connection element 150, and the connection element 150 is accessible at the first region 160 of the envelope 120 for enabling access to the connection element 150 to discharge the battery cell 130.

The connection element 150 is accessible at the first region 160 of the envelope 120.

In an example, the connection element 150 is exposed at the first region 160 of the envelope 120. As above, the connection element 150 may be exposed prior to destruction of the envelope 120, or subsequent to destruction of the envelope 120. That is, the battery module 10 may be accessible (e.g., so as to form an electrical connection therewith for discharging the battery cell 130) via the first region 160 subsequent to destruction of the envelope 120 at the first region 160. In an example, the first region 160 of the envelope 120 has a first characteristic, and a second region 170 of the envelope has a second characteristic. The first characteristic and second characteristic are such that the envelope 120 has a higher destruction attribute at the first region 160 of the envelope 120 than at the second region 170 if the envelope 120. The higher destruction attribute means that the envelope 120 is more readily destructible at the first region 160 than at the second region 170.

In this way, the connection element 150 is more readily (e.g., more quickly or easily) accessible at the first region 160 of the envelope 120 than, for example, the battery cell 130 at the second region 170 of the envelope 120. This enables access to the connection element 150 prior to the second region 170 of the envelope 120 being destructed, such that discharging of the battery cell 130 can be performed prior to destruction of the second region 170 of the envelope 120 at or about the battery cell 130.

The characteristic may be any characteristic of the material that relates to the ability of, or readiness of, the material to destruct. For example, the characteristic may be a choice of material, bonding agent, material thickness, and/or any other suitable characteristic. In this context, the important feature is that the first region 160 of the envelope 120 can be destructed more easily and/or earlier than the second region 170 of the envelope 120 can be destructed. This allows discharging of the battery cell 120 via forming an electrical connection with the connection element 150, prior to the envelope region at the battery cell 120 being destructed. Highly advantageously, this means that the battery cell 120 can be discharged whilst it is still covered by the envelope 120.

The destruction attribute may be a speed or ease with which the envelope 120 destructs. For example, in the same solution/solvent, a higher destruction attribute at the first region 160 than at the second region 170 means that the first region 160 destructs more quickly or easily (e.g., loses material or structural property more easily) than the second region 170. That is, a material with a higher destruction attribute will destruct more readily (e.g., quickly or easily) than a material with a lower destruction attribute. The first region 160 of the envelope 120 has a first envelope thickness (indicated at “A” in Figure 2). That is, the first characteristic (i.e., the characteristic of the first region 160) may be the first envelope thickness A. The second region 170 of the envelope 120 may be provided at the battery cell 130. The second region 170 of the envelope 120 has a second envelope thickness (indicated at “B” in Figure 2). That is, the second characteristic (i.e., the characteristic of the second region 170) may be the second envelope thickness B. The second envelope thickness B is greater than the first envelope thickness A.

The second envelope thickness B may be between 2 to 10 times, or more preferably between 2 to 3 times, the first envelope thickness A.

In this way, the envelope may be more readily destructed at the first region 160 than at the second region 170. That is, whilst the same material may be used in both the first region 160 and second region 170, the thinner material of the first region 160 will have a higher destruction attribute (by being destructed quicker, due to it being thinner) than the material of second region 170. In an example where the connection element 150 is exposed at the first region 160 of the envelope 120, the aforementioned thicknesses of the envelope 120 results in the connection element 150 being exposed, or accessible, prior to the battery cell 130 becoming accessible. Access to the connection element 150 enables discharging of the battery cell 130, and in this example, discharging of the battery cell prior to exposure of the battery cell 130. Highly advantageously, this prevents the envelope 120 around the charged battery cell 130 becoming destructed until the battery cell 130 is discharged. Safety of discharging, disassembly and of the recycling process is thus improved.

In an exemplary recycling process, it is required for the battery cell 130 to be discharged and accessed in order to remove the battery cell 130 in a safe manner. The discharging of the battery cell 130 and destruction of the destructible envelope 120 can be performed in a single step, as follows.

The battery module 10 (e.g., the entire battery module 10) may be placed in an electrically conductive solvent. The battery module 10 may be placed in a bath of electrically conductive solvent. The battery module 10 or a portion thereof may be immersed in electrically conductive solvent. Due to the relatively reduced thickness of the first region 160 compared with the thickness of the second region 170, the destructible envelope 120 at the first region 160 will destruct first (for example by partial or complete dissolution). The connection element 150 is thereby exposed to the electrically conductive solvent at the first region 160.

In some examples, at this stage, it may be possible to connect a discharge accessory or kit to the connection element 150 at the first region 160, to draw current from the battery cell 130 so as to discharge the battery cell 130. However, in a preferred example, the electrically conductive solvent causes the battery cell 130 to discharge via the solvent, which avoids handling of the battery cell 130 by the disassembler. This also allows discharging and destruction of the envelope 120 to occur in a single step (without handling by the disassembler).

The material thicknesses are selected such that the destructible envelope 120 at or around the battery cell 130 (e.g., in the second region 170) only destructs at a time at which the battery cell 130 is completely or mostly discharged (e.g., below a safe threshold level). That is, due to the greater thickness of the envelope 120 in the second region 170, the envelope 120 in said region will not destruct until the solvent has been in contact with the connection element 150 for a sufficient time to achieve discharging of the battery cell 130. In this way, the disassembler is not exposed to a charged battery cell 130, and safe and controlled access to the discharged battery cell 130 is thus provided. The battery cell 130 can then be recycled.

The first region 160 of the envelope 120 may comprise a first envelope material. That is, the first characteristic (i.e. , the characteristic of the first region 160) may be the first envelope material. The second region 170 of the envelope 120 may comprise a second envelope material. That is, the second characteristic (i.e., the characteristic of the second region 170) may be the second envelope material. The first envelope material and second envelope material may be different materials. The first envelope material may have a higher destruction attribute than the second envelope material. Here, having a higher destruction attribute may means that the first envelope material has a greater destruction speed, or rate of destruction, than the second envelope material in a solvent. The solvent may be the same solvent. That is, when a solvent is applied to the battery module 10, for example by immersing the battery module or a portion thereof in the solvent, the first envelope material may destruct quicker than, or before, the second envelope material. In this way, the envelope 120 at the first region 160 will be destructed prior to the envelope 120 at the second region 170. Advantageously, this allows the battery cell 130 to be discharged via access at the first region 160 at a time at which the battery cell 130 is not exposed due to the envelope 120 at the second region 170 not yet having been destructed.

As above, in an exemplary recycling process, it is required for the battery cell 130 to be discharged and accessed in order to remove the battery cell 130 in a safe manner. The discharging of the battery cell 130 and destruction of the destructible envelope 120 can be performed in a single step, as follows.

The battery module 10 (e.g., the entire battery module 10) may be placed in an electrically conductive solvent. The battery module 10 may be placed in a bath of electrically conductive solvent. The battery module 10 or a portion thereof may be immersed in electrically conductive solvent.

Due to the differing destruction speeds, or differing rates of destruction, the destructible envelope 120 at the first region 160 will destruct first (for example by partial or complete dissolution). The connection element 150 is thereby exposed to the electrically conductive solvent at the first region 160.

The materials (and thus their destruction speeds or rates) are selected such that the destructible envelope 120 at or around the battery cell 130 (e.g., in the second region 170) only destructs at a time at which the battery cell 130 is completely or mostly discharged (e.g., below a safe threshold level). That is, due to the slower destruction speed of the envelope 120 in the second region 170, the envelope 120 in said region will not destruct until the solvent has been in contact with the connection element 150 for a sufficient time to achieve discharging of the battery cell 130. In this way, the disassembler is not exposed to a charged battery cell 130, and safe and controlled access to the discharged battery cell 130 is thus provided. The battery cell 130 can then be recycled.

In an example, the battery cell 130 is a soft pouch battery cell. Soft pouch battery cells are advantageous as they may be sized or shaped to make effective use of available space in the aerosol generation device 10. In another example, the battery cell 130 is a can cell. In another example, the battery cell is a prismatic cell. The battery cell 130 may be a lithium-ion soft pouch battery cell, or other type of battery cell wherein the battery cell is a lithium-ion cell, such as a lithium-ion can cell or lithium-ion prismatic cell.

The envelope 120 may be destructed by using a water-based solution or using a saltwater solution. The salt in the salt-water solution may be one or more of sodium chloride (NaCI), sodium sulfide (Na2S), magnesium sulfate (MgSC ), sodium sulfate (Na2SO4), iron sulfate (FeSC ), and zinc sulfate (ZnSC ).

The envelope 120 may be formed from a homogeneous material. Examples of such materials include polylactic acid (PLA), polyvinyl alcohol (PVA), or a biopolymer or a biodegradable polymer.

The envelope 120 may additionally or alternatively be formed from a fibrous material. Examples of such materials include glass fibres, linen fibres, hemp fibres, jute fibres, or the like. A fibrous material may comprise fibres and a bonding agent. The bonding agent may link, join, or bond the fibres to form the fibrous material.

The description provided herein relates primarily to a destructible envelope 120 provided about one or more battery module components 110. However, in related and synergistic examples, destructible covers or cover regions may be provided in the aerosol generation device 100. This applies to all embodiments described herein.

In a related and synergistic example, an assembly may be provided comprising: a cover defining: an internal cover side arrangeable to face one or more components of the aerosol generation device 100; and an external cover side, wherein the cover comprises at least a destructible cover region being destructible to allow access to one or more components at the internal cover side. The assembly may be provided toward the exterior of the aerosol generation device 100, in particular toward the exterior of the device 100 relative to the destructible envelope 120. The assembly may cover the one or more battery module components 110. The internal cover side may be arrangeable to face the one or more battery module components 110 having the destructible envelope 120 provided thereabout.

In this way, the cover provides a level of protection during a process of disassembling and recycling of components of the aerosol generation device 100. Despite this, the cover is readily removable by virtue of being destructible, in order to facilitate disassembly and recycling of the one or more battery module components 110. Destruction of the cover may facilitate access to, and thereby destruction of, the destructible envelope 120 provided about the one or more battery module components 110. Furthermore, in some examples, removal of the cover region and discharging of the battery cell may be performable in a single step, without handling of electrical components by the disassembler.

In another related and synergistic example, the aerosol generation device 100 may comprise an assembly for covering one or more components of an aerosol generation device, the assembly comprising: a cover defining: an internal cover side arrangeable to face one or more components; and an external cover side, the assembly further comprising: one or more contacts configured to be electrically connected to a battery cell, wherein the one or more contacts form part of a discharge circuit for discharging the battery cell, and wherein the one or more contacts are accessible at the external cover side such that an electrical connection can be formed with the battery cell, and the cover may comprise a destructible cover region, or be a destructible cover. In one example, the cover comprises a dissolvable cover region, or is a dissolvable cover. Dissolving is an example of destructing the cover region or cover.

As above, the assembly may be provided toward the exterior of the aerosol generation device 100, in particular toward the exterior of the device 100 relative to the destructible envelope 120. The assembly may cover the one or more battery module components 110. The internal cover side may be arrangeable to face the one or more battery module components 110 having the destructible envelope 120 provided thereabout. In this way, the cover may be destructed and a component of the battery module (specifically the battery cell) discharged, followed by destruction of the destructible envelope. This may be performed in a single step, for example by immersing the aerosol generation device 100 in an appropriate solution.

Figure 4 shows a schematic cross-sectional view of an aerosol generation device. This provides additional or alternative context to the discussions in relation to Figures 1 to 3.

The aerosol generation device 100 is suitable for receiving a consumable 1002 therein. For example, the aerosol generation device 100 may include a chamber 1004 in which the consumable 1002 is received.

The invention is not limited to the specific aerosol generation device 100 or consumable 1002 described herein. That is, the description of the aerosol generation device 100 and consumable 1002 is provided for illustrative purposes only. The skilled person will appreciate that alternative constructions of aerosol generation devices and consumables will be compatible with the present invention.

A consumable 1002 comprises an aerosol substrate. The term aerosol substrate is a label used to mean a medium that generates an aerosol or vapour when heated. Aerosol substrate might be interpreted as an aerosol precursor. In one example, aerosol substrate is synonymous with smokable material, aerosol generation substrate and aerosol generation medium. Aerosol substrate includes materials that provide volatilized components upon heating, typically in the form of vapor or an aerosol. Aerosol substrate may be a non-tobacco-containing material or a tobacco-containing material. Aerosol substrate may, for example, include one or more of tobacco per se, tobacco derivatives, expanded tobacco, reconstituted tobacco, tobacco extract, homogenized tobacco or tobacco substitutes. Aerosol substrate also may include other, non-tobacco, products, which, depending on the product, may or may not contain nicotine. Aerosol substrate may comprise one or more humectants, such as glycerol or propylene glycol.

The aerosol generation device 100 may comprise one or more heaters 1006 configured to provide heat to the consumable 1002, in use. In one example, the consumable 1002 contains a liquid and the one or more heaters comprises a heating element, such as a coil, a ceramic heater, a flat resistive heater, a mesh heater, a MEMS heater, or the like, configured to aerosolise the liquid for inhalation. A liquid delivery element or mechanism, such as a porous material, a capillary system, and/or valve, may transfer the liquid to the heating element, in use. In some examples, the aerosolised liquid may pass through a solid substrate within the aerosol generation device 100. In other examples, the consumable 1002 may comprise a solid aerosol substrate.

In one example, the aerosol generation device 100 comprises a nebulizing engine, such as a vibrating mesh, to generate an aerosol from a liquid with or without heating thereof.

The aerosol generation device 100 may comprise a mouthpiece 1012 through which a user draws on the aerosol generation device 100 to inhale generated aerosol. The mouthpiece 1012 includes a vent or channel 1014 that is connected to a region close to the consumable 1002 for passage of any generated aerosol from the consumable 1002, during use. For example, the channel 1014 may extend between an opening in the mouthpiece 1012 and the chamber 1004 in which the consumable 1002 is at least partially receivable. The mouthpiece 1012 is arranged such it may be received in a user’s mouth in use. In other examples, a mouthpiece 1012 is not required and a portion of the consumable 1002 may protrude from the aerosol generation device 100. In this example, protruded portion of the consumable 1002 may work as mouthpiece.

The aerosol generation device 100 may comprise a control unit 1008 (or control circuitry) for electronic management of the device. The control unit 1008 may include a PCB or the like (not shown). The control unit 1008 is configured to control the one or more heaters 1006.

The aerosol generation device 100 may comprise an activation input sensor 1018. The activation input sensor 1018 may be a button, a touchpad, or the like for sensing a user’s input, such as a tap or swipe. In other examples, the activation input sensor 1018 comprises a consumable sensor configured to detect if a consumable 1002 has been inserted into the aerosol generation device 100. For example, the input sensor 1018 may comprise an authenticity detector that is configured to detect if an authentic consumable 1002 has been inserted into the aerosol generation device 100. Additionally, or alternatively, the user input may also comprise an inhalation action by a user.

The aerosol generation device 100 may comprise a puff sensor 1020 (otherwise known as an inhalation sensor). The puff sensor 1020 is configured to detect an inhalation action (or puff) by a user on the aerosol generation device 100. In one example, the puff sensor 1020 comprises a microphone or a flow sensor configured to an airflow within the chamber 1004 and/or an airflow channel extending from the chamber 1004 through the mouthpiece 1012 to an inhalation outlet thereof, the airflow being associated with a user’s inhalation action. In other examples, the puff sensor 1020 is configured to detect a change in pressure indicative of a beginning of an inhalation action on the aerosol generation device 100 by the user. In this case, the puff sensor 1020 may be located anywhere on the aerosol device 100 in which there would be a change in pressure due to an inhalation action of the user. In one example, the puff sensor 1020 is located in the channel 1014 between the chamber 1004 and the mouthpiece 1012 of the aerosol generation device 100. The puff sensor 1020 may also detect the end of an inhalation action by the user. For example, the puff sensor 1020 may be configured to detect a further change in pressure due to the end of an inhalation action of a user.

The aerosol generation device 100 may include one or more temperature sensors 1022 configured to directly or indirectly measure the temperature of the consumable 1002 in the aerosol generation device 100. The one or more temperature sensors 1022 may comprise a temperature sensor, such as a thermocouple or thermistor, configured to be located within or adjacent to the consumable 1002 when it is received in the aerosol generation device 100. For example, the one or more temperature sensors 1022 may be located within the chamber 1004 of the aerosol generation device 100. In other examples, the temperature of the consumable 1002 may be indirectly measured by the use of thermal imaging sensors. In further other example, the heater 1006 itself works as a temperature sensor if the heater 1006 has PTC (Positive Temperature Coefficient) or NTC (Negative Temperature Coefficient) characteristic.

The aerosol generation device 100 may include a power supply 1050 such as a battery cell. The power supply 1050 may comprise, or be, a battery module 10 (as discussed in relation to previous Figures). As above, the power supply 1050 may comprise, or be, a battery module 10 comprising one or more battery module components 110 and a destructible envelope 120 provided about the one or more battery module components 110.

The power supply 1050 may comprise, or be, a removable battery module 10. That is, the battery module 10 may be removable from connection to, or in, the aerosol generation device 100. Advantageously, this may simplify servicing, maintenance, replacement, and/or recycling of components of the battery module. The battery module 10 may be providable or locatable in, and removable from, the aerosol generation device 100. The battery module 10 may comprise a housing, or housing portion, which when the battery module is provided in the aerosol generation device 100 closes, or completes, a portion of a housing or the aerosol generation device 100.

The power supply may provide the aerosol generation device 100 with electrical energy providing a voltage in the range of 3 V and 18 V, preferably in the range of 3 V and 4.2 V. In a preferred embodiment the voltage source (which may be the battery cell 110) is a lithium-ion secondary battery delivering a value of 3.7 V. Such a voltage source is particularly advantageous for a modern aerosol generation device in view of rechargeability, high energy density and large capacity. The power supply 1050 may provide power for operation of the aerosol generation device 100, for example the necessary power to generate aerosol. In an example, the power supply 1050 may provide power to one or more heaters 1006.

The aerosol generation device 100 may comprise a controller 1030. The controller 1030 is connected to the control unit 1008. The controller 1030 is configured to receive data from the control unit 1008. In particular, the controller 1030 is configured to receive data from the control unit 1008 relating to various sensors/inputs (such as the activation input sensor 1018, puff sensor 1020 and/or temperature sensor 1022) of the aerosol generation device 100.

The controller 1030 and the control unit 1008 may be integral with each other. In one example, a single component performs the function of the control unit 1008 and controller 1030. In other examples, the control unit 1008 and the controller 1030 are distinct components.

The aerosol generation device 100 may comprise a USB port 1052 (e.g., a USB receiving port). The USB port may provide connection to the controller 1030. Referring to Figure 5, a method of using a battery module of an aerosol generation device is shown. The battery module comprises one or more battery module components; and a destructible envelope provided around the one or more battery module components, thereby to at least partially envelop the one or more battery module components, wherein the destructible envelope is configured to be destructed by processing thereof. Step S500 comprises destructing the destructible envelope, thereby to enable access to one or more of the one or more battery module components.

Step S510 comprises dissolving the destructible envelope subsequent to discharging a battery cell of the one or more battery module components.

Step S520 comprises discharging the battery cell by accessing the battery module at a first region of an destructible envelope.

Step S530 comprises discharging the battery cell by accessing a connection element connected to the battery cell. Step S540 comprises dissolving the destructible envelope provided about the battery cell subsequent to discharging the battery cell.

A subsequent step may comprise removing the battery cell from the battery module, or from connection to the battery module. The battery cell may be replaced with another component, for example a new battery cell. A destructible envelope may then be applied to the new battery cell and other components of the battery module 10.

It will be appreciated that the invention that has been described and defined above may allow the related apparatus and methods to drive, comply with, or more easily comply with, legal and regulatory requirements, guidelines and standards. In particular, this might be in relation to one or more of apparatus (e.g. battery or related device) inspection, indication/status, recycling, reuse, repair, replacement, and maintenance, whether by an end user or service provider.

Referring generally to the description herein, further detail is hereby provided in relation to terms used above and features described in the present disclosure, or to further terms relevant to the present disclosure: - A “battery” may mean any device delivering electrical energy generated by direct conversion of chemical energy, having internal or external storage, and consisting of one or more non-rechargeable or rechargeable battery cells or modules thereof, and includes a battery that has been subject to preparation for re-use, preparation for repurposing, repurposing or remanufacturing;

- A “battery module” may mean one or more battery module components (e.g., any set of one or more battery cells and/or one or more other components, as described above) that are connected together or encapsulated within an outer casing, housing, surround, envelope, wrapping, or the like, to protect the cells against internal impact, and which is meant to be used either alone or in combination with other modules. In some examples, a “battery module” within the context of this specification may otherwise be known as a “battery pack”;

- A “battery cell” may mean the basic functional unit in a battery, composed of electrodes, electrolyte, container, terminals, and, if applicable, separators, and containing the active materials the reaction of which generates electrical energy;

- An “active material” means a material which reacts chemically to produce electric energy when the battery cell discharges or to store electric energy when the battery is being charged.

Although preferred embodiments have been shown and described, it will be appreciated by those skilled in the art that various changes and modifications might be made without departing from the scope of the invention, as defined in the appended claims and as described above.

Claims

1. A battery module for an aerosol generation device comprising: one or more battery module components; and a destructible envelope provided around the one or more battery module components, thereby to at least partially envelop the one or more battery module components, wherein the destructible envelope is configured to be destructed by processing thereof such that access to one or more of the one or more battery module components is enabled.

2. The battery module according to claim 1 , wherein the one or more battery module components comprises a battery cell and a connection element in electrical connection with the battery cell, wherein the destructible envelope is configured to be destructible by application of heat or liquid thereto to cause mechanical degradation of the destructible envelope.

3. The battery module according to claim 2, wherein the destructible envelope is configured to be more readily destructible at a first region of the envelope for enabling access to the connection element than at a second region of the envelope for enabling access to the battery cell.

4. The battery module according to claim 3, wherein the connection element is accessible at the first region of the envelope for enabling access to the connection element to discharge the battery cell.

5. The battery module according to claim 4, wherein the first region of the envelope has a first characteristic, and the second region of the envelope has a second characteristic, the first characteristic and second characteristic being such that the envelope has a higher destruction attribute at the first region of the envelope than at the second region of the envelope.

6. The battery module according to claim 5, wherein the first characteristic is a first envelope thickness, and the second characteristic is a second envelope thickness, wherein the second envelope thickness is greater than the first envelope thickness.

7. The battery module according to claim 5 or claim 6, wherein the first characteristic is a first envelope material, and the second characteristic is a second envelope material, wherein the first envelope material has a higher destruction attribute than the second envelope material.

8. The battery module according to any one of the preceding claims, wherein the battery cell is a soft pouch battery cell, a can cell, or a prismatic cell.

9. The battery module according to any one of the preceding claims, wherein the envelope is destructible in a water-based solution or in a salt-water solution, optionally wherein the salt is one or more of NaCI, Na2S, MgSC , Na2SO4, FeSC , and ZnSC .

10. The battery module according to any one of the preceding claims, wherein the envelope is formed from a homogeneous material and/or a fibrous material.

11. An aerosol generation device comprising a battery module according to any one of the preceding claims.

12. A method of using a battery module of an aerosol generation device, the battery module comprising: one or more battery module components; and a destructible envelope provided around the one or more battery module components, thereby to at least partially envelop the one or more battery module components, wherein the destructible envelope is configured to be destructed by processing thereof, the method comprising: destructing the destructible envelope, thereby to enable access to one or more of the one or more battery module components.

13. The method according to claim 12, wherein the method comprises: destructing the destructible envelope subsequent to discharging a battery cell of the one or more battery module components.

14. The method according to claim 13, wherein the method comprises: discharging the battery cell by accessing the battery module at a first region of the destructible envelope.

15. The method according to claim 14, wherein the method comprises: discharging the battery cell by accessing a connection element connected to the battery cell; and destructing the destructible envelope provided about the battery cell subsequent to discharging the battery cell.