WO2022183344A1 - Battery cell assembly, battery module, and handheld electrical device - Google Patents

Abstract

Disclosed in the present invention is a battery cell assembly, comprising an adapter plate and multiple soft package battery cells. The multiple soft package battery cells are stacked on the two sides of the adapter plate; and the surface of each side of the adapter plate is coupled with positive and negative electrodes of the soft package battery cell on the same side of the adapter plate only on the surface of the side. Further disclosed in the present invention are a battery module comprising the battery cell assembly, and a handheld electrical device using the battery module. The battery cell assembly and the battery module of the present invention are high in space utilization rate and large in volume energy density. When the battery module is applied to the handheld electrical device, the size and weight of the handheld electrical device are facilitated to be reduced, and the portability, aesthetics, and holding comfort of the handheld electrical device are improved.

Description

Cell components, battery modules and hand-held electrical equipment technical field

The present application relates to the technical field of battery design, and in particular, to a cell assembly, a battery module including the cell assembly, and a handheld electrical device using the battery module.

Background technique

With the development of science and technology and the improvement of people's living standards, small hand-held electrical equipment (such as vacuum cleaners, beauty instruments, hair dryers, fascia guns, etc.) are more and more widely used in daily life. In order to improve portability and flexibility in use, hand-held electrical devices are usually powered by batteries. At present, there are mainly two types of cells used in batteries, one is cylindrical cells with hard shells (such as steel shells, aluminum shells), such as 18650 cells, 21700 cells, etc.; the other is soft-coated cells, For example, a liquid lithium ion battery wrapped by a film-like casing (eg, aluminum-plastic film, steel-plastic film), etc. It is usually difficult for a single cell to meet the power, voltage or/and current requirements of a handheld electrical device, and multiple single cells need to be formed into a cell pack (Pack). Generally, the battery cell assembly is wrapped in a housing to form a battery module to supply power to the device.

In some cases, the battery pack of the handheld electrical device is disposed within its handle. In order to ensure a better grip, the handle is usually set as a cylinder, and the diameter should not be too large (usually about 40-42mm); for the overall aesthetics and ease of operation of the device, the length of the handle should not be enough The premise is too long.

The above-mentioned size limitation of the handle brings challenges to the design of the battery module of the hand-held electrical device. For cylindrical cells, the size is usually fixed (for example, 18650 cylindrical cells, with a diameter of 18mm and a length of 650mm), multiple cylindrical cells cannot be combined flexibly, either causing the handle to be too thick or causing the inside of the handle to be too thick. The space utilization rate is low, the volume energy density of the entire battery module is low, and the heat dissipation performance is poor. For pouch cells, although the size can be flexibly customized and the heat dissipation is good, the existing design methods of battery modules using pouch cells are still difficult to meet the power consumption of handheld devices under the limitation of handle size. need.

Figures 1, 2A and 2B show two combinations of prior art soft-covered cells in a typical handle (cylindrical space). In the combination shown in Figure 1, each soft-packed cell is stacked along the axial direction of the cylindrical space, and the electrodes of each cell are connected to the adapter board and the BMS board (Battery Management System, also known as the battery protection board) through cables. ). In the combination mode shown in FIG. 2A , each soft-packed cell is stacked along the radial direction of the cylindrical space to form a cell group. In the combination mode shown in FIG. 2B , each soft-packed cell is stacked along the radial direction of the cylindrical space to form a multi-cell group, and the plurality of cell groups are arranged in the axial direction. Each cell group corresponds to an adapter board, the electrodes of each soft-covered cell in the cell group are connected to the corresponding adapter board through cables, and the adapter board is then connected to the BMS board through cables.

In the above two combinations, the electrodes of the cell, the adapter plate, and the BMS board are connected by cables, and a protective structure needs to be installed outside each cell group. Moreover, in the combination method of Figure 1, a longer adapter plate needs to be arranged in the axial direction, and the length and width of the cell are smaller than the diameter of the cylindrical space, which is too narrow, which is not conducive to the production and energy density of the cell. The length of the single cell in Figure 2A is too long, which is limited by the principle of the soft-packed cell and the existing process, which greatly reduces the energy density of the cell; although the length of the adapter plate in Figure 2B is smaller than that in Figure 1, But need to set up multiple adapter boards. A large number of cables, protective structures, and adapter plates occupy a large volume of space, which makes the available space of the battery module more limited and the volumetric energy density is low.

public content

In order to overcome or at least partially alleviate the above-mentioned technical problems, the present disclosure provides a battery cell assembly, a battery module and a handheld electrical device.

According to a first aspect of the present disclosure, a cell assembly is provided, comprising: an adapter plate and a plurality of soft-wrapped cells; the plurality of soft-wrapped cells are stacked and disposed on both sides of the adapter board; the Each side surface of the adapter plate is respectively coupled with the positive and negative electrodes of the soft-packed cells on the same side only on the side surface.

Optionally, in the cell assembly of the first aspect, each side surface of the adapter plate is provided with a positive coupling point and a negative coupling point, and the positive coupling point and the negative coupling point are only on the same side as the same side. The positive and negative electrodes of the soft-packed cells are coupled with each other.

Optionally, in the battery cell assembly of the first aspect, a battery protection board is further included; each side surface of the adapter plate is respectively electrically connected to the positive and negative electrodes of the soft-packed cells on the same side only on the side surface; The adapter board is electrically connected to the battery protection board through a conductor.

Optionally, in the battery cell assembly of the first aspect, a battery protection board is further included; the positive and negative electrodes of the plurality of soft-wrapped cells are electrically connected to the battery protection board through conductors; Each side surface is respectively coupled with the electrical conductor on the same side of the electrical conductor only on the side surface structure, and plays a structural support and/or insulating protection role for the electrical conductor.

Optionally, in the cell assembly of the first aspect, the electrical conductor includes at least one of the following: a wire, a copper sheet, a nickel sheet, a printed circuit board, a flexible circuit board, and a sheet-like connector.

Optionally, in the cell assembly of the first aspect, the plane on which the adapter plate is located is parallel to the stacking direction of the soft-covered cells.

Optionally, in the cell assembly of the first aspect, the plane on which the battery protection board is located is perpendicular to the plane on which the adapter plate is located.

Optionally, in the cell assembly of the first aspect, a connection circuit is printed on the adapter plate, and the connection circuit is used to realize series-parallel connection between the soft-packaged cells located on both sides of the adapter plate.

Optionally, in the battery cell assembly of the first aspect, a connection circuit is printed on the battery protection board, and the connection circuit is used to realize series or parallel connection of soft-packed cells.

According to the cell assembly of the first aspect, by disposing a single transfer board, the soft-covered cells are stacked and arranged on both sides of the transfer board, and the surface of each side of the transfer board is respectively the positive side of the soft-covered cell on the same side. The negative poles are coupled only on this side surface, reducing the number of adapter plates, thereby reducing the space occupied by the adapter plates. In this way, under the premise that the space of the cell assembly is given, the space occupied by the adapter board in the length direction of the cell assembly is reduced. It can be increased, thereby improving the space utilization rate of the cell assembly in a given space and improving the volumetric energy density.

Further, in the above-mentioned embodiments, the adapter plate and the battery protection board are electrically connected, or the soft-packed cells and the battery protection board are electrically connected through a conductor. The conductor is a thin sheet with a certain strength, and its thickness is much smaller than that of an ordinary cable. , and will not twist and twist like a cable. Compared with the cable connection scheme, the solution of realizing electrical connection through conductors greatly reduces the space occupied by the connector, correspondingly, the available space of the soft-packed cell is increased, and the soft-packed electric cell that can be accessed in the cell assembly is increased. The number of cores and/or the size of a single soft-wrapped cell is increased, thereby improving the space utilization of the cell assembly in a given space and increasing the volumetric energy density.

According to a second aspect of the present disclosure, a battery module is provided, comprising the cell assembly of the first aspect and a cylindrical structural member covering the outside of the cell assembly, the axis of the cylindrical structural member being connected to the The stacking direction of the soft-wrapped cells in the cell assembly is vertical.

Optionally, in the battery module of the second aspect, a flexible buffer material is filled between the wall of the cylindrical structure and the side surfaces of the plurality of stacked soft-packed cells and between adjacent soft-packed cells.

Optionally, in the battery module of the second aspect, a wall of the cylindrical structural member is provided with a first limit plate, and a plurality of stacked soft-packed cells are disposed on the first limit plate parallel to the axis. .

Optionally, in the battery module of the second aspect, the wall of the cylindrical structural member is further provided with a second limit plate parallel to the first limit plate, and the plurality of stacked soft-packed cells are provided with between the first limit plate and the second limit plate.

Optionally, in the battery module of the second aspect, the cylindrical structural member includes a plurality of shell pieces, and the plurality of shell pieces are snap-fastened.

Optionally, in the battery module of the second aspect, a plurality of stacked soft-packed cells form at least one cell group, and a wall of the cylindrical structural member is provided with a recess, and the recess is configured to accommodate the Sides of the battery pack that are parallel to the axis.

The battery module according to the second aspect includes the cell assembly of the first aspect, so that the battery module has the same technical effects as the cell assembly above, that is, high space utilization and high volumetric energy density.

Further, in the embodiments of the second aspect above, the accommodating space inside the cylindrical structural member is increased by arranging a depression on the wall of the cylindrical structural member, so that the cylindrical structural member can accommodate a larger size or more quantity. The soft-packed cells can improve the volumetric energy density of the battery module.

According to a third aspect of the present disclosure, a battery module is provided, comprising: a plurality of soft-packed cells and a cylindrical structural member wrapped outside the plurality of soft-packed cells, the plurality of soft-packed cells At least one cell group is formed by stacking, and the axis of the cylindrical structure is perpendicular to the stacking direction of the soft-wrapped cells in each cell group; the wall of the cylindrical structure is provided with a recess, and the recess is configured so as to accommodate the side edges of the battery pack that are parallel to the axis.

Optionally, in the battery module of the third aspect, the recess is formed by reducing the wall thickness of the wall.

Optionally, in the battery module of the third aspect, the recess is formed by a notch on the wall.

Optionally, in the battery module of the third aspect, a flexible buffer material is filled between the wall of the cylindrical structural member and the side surface of the cell group, and between adjacent soft-packed cells.

Optionally, in the battery module of the third aspect, a wall of the cylindrical structural member is provided with a first limiting plate, and the battery cell group is provided on the first limiting plate parallel to the axis.

Optionally, in the battery module of the third aspect, the wall of the cylindrical structural member is further provided with a second limit plate parallel to the first limit plate, and the battery pack is arranged at the first limit plate. between the plate and the second limit plate.

Optionally, in the battery module of the third aspect, the cylindrical structural member includes a plurality of shell pieces, and the plurality of shell pieces are snap-fastened.

Optionally, in the battery module of the third aspect, a battery protection board is further included, and the battery protection board is electrically connected to the soft-packed cells through a conductor.

Optionally, in the battery module of the third aspect, an adapter board is further included; the battery protection board is electrically connected to the adapter board through a conductor, and the adapter board is electrically connected to the soft pack battery core.

Optionally, in the battery module of the third aspect, the electrical conductor includes at least one of the following: a wire, a copper sheet, a nickel sheet, a printed circuit board, a flexible circuit board, or a sheet-like connector.

Optionally, in the battery module of the third aspect, the plane on which the battery protection plate is located is parallel to the axis of the cylindrical structure.

Optionally, in the battery module of the third aspect, the plane on which the adapter plate is located is parallel to the stacking direction of the soft-packed cells.

Optionally, in the battery module of the third aspect, a connection circuit is printed on the adapter board and/or the battery protection board, and the connection circuit is used to realize series or parallel connection of soft-packed cells.

According to the battery module of the third aspect, by arranging the depression on the wall of the cylindrical structure, the accommodating space inside the cylindrical structure is increased, so that the cylindrical structure can accommodate larger size or more Soft-packed cells, thereby improving the volumetric energy density of the battery module.

Further, in the embodiment of the above third aspect, the battery protection board is electrically connected to the soft-packed cells through the conductor, or the battery protection board is electrically connected to the adapter board through the conductor, and the adapter board is electrically connected to the soft-pack battery. core. Compared with ordinary cables, the space occupied by the conductor is smaller, correspondingly, the available space of the soft-packed cells is increased, and the number of soft-packed cells and/or a single soft-packed cell that can be connected to the battery module is increased. The size of the battery module increases, thereby improving the space utilization rate of the battery module in a given space and increasing the volumetric energy density.

According to a fourth aspect of the present disclosure, there is provided a hand-held electrical device, comprising: a working part, a holding part, and the battery module according to any one of the above embodiments; the holding part includes an accommodating cavity, and the battery The module is fixed in the accommodating cavity; the battery module supplies power to the working part.

Optionally, in the handheld electrical device of the fourth aspect, an interface for charging and/or discharging the battery module is further included.

Optionally, in the handheld electrical device of the fourth aspect, the battery module is replaceably fixed in the accommodating cavity.

Optionally, the handheld electrical equipment of the fourth aspect includes: a vacuum cleaner, a beauty instrument, a hair dryer, and a fascia gun.

According to the handheld electrical equipment of the fourth aspect, since the battery module with high volumetric energy density in any of the above-mentioned embodiments is used, it is beneficial to reduce the size and weight of the handheld electrical equipment, and improve the portability of the handheld electrical equipment. Aesthetics and grip comfort.

Description of drawings

Preferred embodiments according to the present disclosure will be described in detail below with reference to the schematic drawings. In the attached picture:

Fig. 1, Fig. 2A and Fig. 2B are respectively two kinds of combinations of prior art soft-packed cells in the cylindrical space;

FIG. 3 shows a perspective view of the cell assembly 100 according to the first embodiment of the present disclosure;

FIG. 4 shows a perspective view of the pouch cell 120 according to the first embodiment of the present disclosure;

Fig. 5 shows a partial enlarged view of the dotted rectangle frame area in Fig. 3;

6 shows a cross-sectional view of the battery module 200 according to the first embodiment of the present disclosure, which is perpendicular to the axis of the cylindrical structural member 250;

7A and 7B illustrate perspective views of one end of a battery module 300 according to the second embodiment of the present disclosure;

8 shows a cross-sectional view of the battery module 300 according to the second embodiment of the present disclosure, which is perpendicular to the axis of the cylindrical structural member 350;

FIG. 9 shows a perspective view of the battery cell assembly 400 in which the soft-packed battery cells 420 are electrically connected to the battery protection board 430 through the electrical conductors 440 according to the second embodiment of the present disclosure; and

10 shows a perspective view of the cell assembly 400 in which the soft-packed cells 420 are electrically connected to the adapter plate 410 , and the adapter plate 410 is electrically connected to the battery protection board 430 through the conductors 440 according to the second embodiment of the present disclosure.

The accompanying drawings illustrate the embodiments and constitute a part of the specification, and together with the written description of the specification serve to explain exemplary implementations of the embodiments. The shown embodiments are for illustrative purposes only and do not limit the scope of protection of the claims. Throughout the drawings, the same reference numbers refer to the same or similar elements.

Detailed ways

In the present disclosure, unless otherwise specified, the use of the terms "first", "second", etc. to describe various elements is not intended to limit the positional relationship, timing relationship or importance relationship of these elements, and such terms are only used to distinguish one element from another. In some examples, the first element and the second element may refer to the same instance of the element, while in some cases they may refer to different instances based on the context of the description.

The terminology used in the description of the various described examples in this disclosure is for the purpose of describing particular examples only and is not intended to be limiting. Unless the context clearly dictates otherwise, if the number of an element is not expressly limited, the element may be one or more. Furthermore, as used in this disclosure, the term "and/or" covers any and all possible combinations of the listed items.

It should be noted that, in the following, in order to facilitate the distinction between a single soft-wrapped cell and a cell assembly composed of a plurality of single soft-wrapped cells, a single soft-wrapped cell is recorded as a "soft-wrapped cell".

Hereinafter, the battery cell assembly and the battery module according to the present disclosure will be described in detail with reference to FIGS. 3 to 10 .

3 to 5 illustrate the cell assembly 100 of the first embodiment of the present disclosure.

As shown in FIG. 3 , the cell assembly 100 includes an adapter plate 110 and a plurality of soft-packed cells 120 . The plurality of soft-packed cells 120 are stacked on both sides of the adapter plate 110 , and each side surface of the adapter plate 110 The positive and negative electrodes of the soft-packed cells 120 on the same side are coupled only on the side surface.

The soft-packed cell 120 is generally in the shape of a flat rectangular parallelepiped, that is, its thickness is small, as shown in FIG. 4 . It should be understood that the structure of the pouch cell shown in FIG. 4 is only an example, and the present disclosure does not limit the shape and size of the pouch cell. In addition, the present disclosure does not limit the number of soft-wrapped cells included in the cell assembly. In the embodiment shown in FIG. 3 , the cell assembly 100 includes four pouch cells 120 - 1 to 120 - 4 , and each pouch cell has a width of 30 mm to 35 mm and a length of 85 mm up to 95mm, with thicknesses ranging from 4mm to 10mm.

In the cell assembly 100 of the present disclosure, a plurality of soft-wrapped cells 120 are stacked and disposed on both sides of the adapter plate 110 . For example, as shown in FIG. 3 , the soft-packed cells 120-1 and 120-2 are stacked on one side of the adapter board 110 (the left side in FIG. 3 ); the soft-packed cells 120-3 and 120-4 are stacked. It is arranged on the other side (right side in FIG. 3 ) of the adapter plate 110 . In the embodiment of the present disclosure, a plurality of soft-coated cells 120 located on the same side of the adapter plate 110 may be recorded as a cell group. Correspondingly, the cell assembly 100 shown in FIG. 3 includes two cells group, namely the first cell group and the second cell group, wherein the first cell group includes soft-wrapped cells 120-1 and soft-wrapped cells 120-2, and the second cell group includes soft-wrapped cells 120 -3 and pouch cells 120-4.

It should be noted that, since the plurality of soft-wrapped cells 120 in the cell assembly 100 are divided into multiple groups, the stacking directions of the soft-wrapped cells in the cell assembly 100 include two types, namely the first stacking direction and the second stacking direction direction. The first stacking direction refers to the stacking direction of a plurality of soft-wrapped cells 120 in a single cell group, that is, the stacking direction of the soft-wrapped cells 120 located on the same side of the adapter plate 110 . For example, as shown in FIG. 3 , the directions indicated by arrows a and b are the first stacking directions. The second stacking direction refers to the stacking direction of the plurality of cell groups. For example, as shown in FIG. 3 , the direction indicated by arrow c is the second stacking direction. In this embodiment, the first stacking direction is perpendicular to the second stacking direction. It should be noted that, in some embodiments, the arrow a and the arrow b may not be parallel, but are both perpendicular to the direction of the arrow c. That is, the stacking directions of the cells in different cell groups do not need to be the same, but the stacking direction of the cells in any one cell group should be perpendicular to the second stacking direction. It should be noted that, unless otherwise specified, the “stacking direction” hereinafter refers to the first stacking direction, that is, the stacking direction of the soft-covered cells 120 located on the same side of the transition board 110 .

In order to save space and improve the volumetric energy density of the cell assembly 100 , in one embodiment of the present disclosure, the plane where the adapter plate 110 is located may be parallel to the stacking direction of the soft-packed cells, as shown in FIG. 3 .

Each side surface of the adapter plate 110 is respectively coupled with the positive and negative electrodes of the soft-packed cells 120 on the same side only on the side surface. The positive and negative electrodes of the soft-packed cells are only coupled on this side surface, which means that the positive and negative electrodes of the soft-packed cells are only coupled on this side surface by means of direct or indirect (for example, coupling through middleware such as conductors). , without any contact with the other side surface of the adapter plate 110 . For example, as shown in FIG. 3 and FIG. 5 , the left side surface of the adapter plate 110 is coupled with the positive and negative electrodes of the soft-packed cells 120 - 1 and 120 - 2 located on the left side only on the left side surface. The right side surface of the connection plate 110 is coupled with the positive and negative electrodes of the soft-packed cells 120-3 and 120-4 located on the right side thereof only on the right side surface.

By arranging a single transfer board, the soft-packed cells are stacked on both sides of the transfer board along the first stacking direction, and the positive and negative electrodes of the soft-packed cells on the same side of the transfer board are only on the same side. The side surfaces are coupled along the second stacking direction, thereby reducing the number of interposer boards, thereby reducing the space occupied by the interposer boards. In this way, under the premise that the space of the cell assembly is given, the space occupied by the adapter board in the length direction of the cell assembly is reduced. It can be increased, thereby improving the space utilization rate of the cell assembly in a given space and improving the volumetric energy density.

According to an embodiment, each side surface of the adapter plate 110 is provided with a positive coupling point and a negative electrode coupling point, and the positive coupling point and the negative electrode coupling point are respectively coupled to the positive and negative electrodes of the pouch cells on the same side. The positive and negative coupling points on each side surface are configured so that the positive and negative electrodes of the pouch cells on the same side are directly or indirectly coupled therewith in an adhesive manner, without being connected to the other side surface of the adapter plate 110 . have any contact. For example, the positive coupling point and the negative coupling point may be the connection points marked on the interposer 110 (eg, printed welding areas, designated welding locations, etc.), rather than holes or grooves that are destructive to the surface of the interposer 110 Structure.

For example, FIG. 5 shows a partial enlarged view of the dashed rectangular frame area in FIG. 3 . As shown in FIG. 5 , positive coupling points 111 and 112 and a negative coupling point 113 are provided on the left side surface of the adapter plate 110 . The positive coupling point 111 is coupled with the positive electrode 121 of the soft-packed battery cell 120-1 located on the left side of the adapter plate 110, and the positive electrode coupling point 112 is coupled with the positive electrode 122 of the soft-packed battery cell 120-2 located on the left side of the adapter plate 110. Coupling, the negative electrode coupling point 113 is coupled with the negative electrode 123 of the soft-packed battery cell 120 - 2 on the left side of the adapter plate 110 . Those skilled in the art can understand that the left side surface of the adapter plate 110 is also provided with a negative electrode coupling point for coupling with the negative electrode of the soft-wrapped cell 120-1, but in FIG. 5, the negative electrode coupling point is soft-wrapped The cell 120-1 is obscured and not shown.

Through the positive coupling points 111, 112 and the negative coupling point 113 provided on the left side surface of the adapter plate 110 and other negative coupling points not shown, the soft-packed cell 120-1 and the soft-packed cell 120-2 are The positive and negative electrodes are only coupled to the left side surface of the adapter plate 110 without any contact with the right side surface of the adapter plate 110 . Similarly, a positive coupling point and a negative coupling point are also provided on the right side surface of the adapter plate 110 , and the positive and negative electrodes of the soft-packed cells 120 - 3 and 120 - 4 are only coupled through the positive and negative coupling points. to the right side surface of the adapter plate 110 without any contact with the left side surface of the adapter plate 110 .

According to an embodiment, as shown in FIG. 3 , the battery cell assembly 100 of the present disclosure further includes a battery protection plate 130 .

The battery protection board 130 can be, for example, an integrated circuit board, which is used for charging management and protection of the soft-packed cells 120 to avoid overcharge, over-discharge, over-current, short-circuit and the like of the soft-packed cells 120 . According to an embodiment, in order to make the structure of the cell assembly 100 other than the soft-packed cells 120 occupy less space and save more space for accommodating the soft-packed cells 120 , the battery protection board 130 is set to Parallel to the second stacking direction, in this embodiment, the plane where the battery protection plate 130 is located is perpendicular to the plane where the adapter plate 110 is located.

According to one embodiment, each side surface of the adapter plate 110 is electrically connected to the positive and negative electrodes of the soft-packed cells 120 on the same side respectively, and the adapter plate 110 is electrically connected to the battery protection plate through the conductor 140 . 130. In this embodiment, a connection circuit is printed on the adapter plate 110, and the connection circuit is used to realize the series-parallel connection between the soft-packed cells located on both sides of the adapter plate 110. For example, the interposer board 110 may be, for example, a printed circuit board or a flexible circuit board on which connection circuits are printed. Through the connection circuit on the adapter plate 110, the positive electrode of the soft-packed cell can be connected to the negative electrode of other soft-packed cell located on the same side or the opposite side of the soft-packed cell, so as to realize the series connection of the soft-packed cell; or Connect multiple soft-packed cells on the same or different sides of the adapter plate 110 to the same pole (ie, the positive pole is connected to the positive pole, and the negative pole is connected to the negative pole), so as to realize the parallel connection of the soft-packed cells; or further realize the connection of the soft-packed cells. series and parallel combination. In some embodiments, connection circuits are printed on both sides of the adapter plate 110 , and the connection circuits on the two sides are conductive, so as to realize the connection between soft-packaged cells located on opposite sides of the adapter plate 110 . Series and parallel. Specifically, the adapter plate 110 may be provided with holes, and conductors are arranged in the holes, and two ends of the conductors are respectively connected to the connection circuits on both sides of the adapter plate 110 to conduct the connection circuits on both sides. Alternatively, a conductor is provided at the edge of the adapter board 110 , one end of the conductor is connected to the connection circuit on one side of the adapter board 110 , and the other end bypasses the edge of the adapter board 110 and is connected to the other side of the adapter board 110 . The connection circuit is connected, so as to conduct the connection circuit on both sides of the adapter board.

One end of the conductor 140 is electrically connected to the adapter board 110 , and the other end is electrically connected to the battery protection board 130 , so that the adapter board 110 is electrically connected to the battery protection board 130 . Specifically, one end of the conductor 140 is electrically connected to the circuit on the adapter board 110 , and the other end is electrically connected to the circuit on the battery protection board 130 . For example, as shown in FIGS. 3 and 5 , one end of the conductors 140 - 1 and 140 - 2 is electrically connected to the circuit on the left side surface of the adapter plate 110 , and the other end is electrically connected to the circuit on the upper surface of the battery protection plate 130 . (The circuits on the adapter board 110 and the battery protection board 130 are not shown in FIGS. 3 and 5 ), so that the adapter board 110 is electrically connected to the battery protection board 130 . Those skilled in the art should understand that the connection manner of the conductors 140 (including the conductors 140-1 and 140-2) in FIG. 3 and FIG. 5 is only an example. In other embodiments, other connection manners may also be used to electrically connect the conductor 140 to the adapter board 110 and the battery protection board 130 . For example, one end of the conductor 140-1 can be electrically connected to the circuit on the left side surface of the adapter plate 110, and the other end can be electrically connected to the circuit on the upper surface of the battery protection board 130; The circuit on the right side surface of the connecting plate 110 is electrically connected, and the other end is electrically connected with the circuit on the upper surface of the battery protection plate 130 . Alternatively, the conductor 140 can also be arranged near the adapter board 110 and the battery protection board 130, and the two ends of the conductor 140 are directly electrically connected to the circuits of the adapter board 110 and the battery protection board 130, respectively, without having to be as shown in the figure. 3. Bend the conductor 140 at the edge of the adapter plate 110 as shown in FIG. 5 , and connect the bent end to the circuit on the upper surface of the battery protection plate 130 .

The electrical conductors 140 may be, for example, a sheet-like structure, and the present disclosure does not limit the number and specific materials of the electrical conductors 140 . For example, the embodiments shown in FIGS. 3 and 5 show two electrical conductors, namely electrical conductors 140-1 and 140-2. One ends of the conductors 140 - 1 and 140 - 2 are electrically connected to the left side surface of the adapter plate 110 , and the other ends are electrically connected to the upper surface of the battery protection plate 130 . Those skilled in the art should understand that the connection manner of the conductors 140 (including the conductors 140-1 and 140-2) in FIG. 3 and FIG. 5 is only an example. In other embodiments, other connection manners may also be used to electrically connect the conductor 140 to the adapter board 110 and the battery protection board 130 . For example, one end of the conductor 140-1 can be electrically connected to the circuit on the left side surface of the adapter plate 110, and the other end can be electrically connected to the circuit on the upper surface of the battery protection board 130; The circuit on the right side surface of the connecting plate 110 is electrically connected, and the other end is electrically connected with the circuit on the upper surface of the battery protection plate 130 . Alternatively, the conductor 140 can also be arranged near the adapter board 110 and the battery protection board 130, and the two ends of the conductor 140 are directly electrically connected to the circuits of the adapter board 110 and the battery protection board 130, respectively, without having to be as shown in the figure. 3. Bend the conductor 140 at the edge of the adapter plate 110 as shown in FIG. 5 , and connect the bent end to the circuit on the upper surface of the battery protection plate 130 . According to one embodiment, the electrical conductor 140 includes at least one of the following: a wire, a copper sheet, a nickel sheet, a printed circuit board, a flexible circuit board, and a sheet connector.

By using conductors to electrically connect the adapter board and the battery protection board, the conductors are thin sheets with a certain strength, whose thickness is much smaller than that of ordinary cables, and will not be twisted or entangled like cables. Compared with the cable connection scheme, the scheme of electrically connecting the adapter board and the battery protection board through the conductor greatly reduces the space occupied by the conductive connector, and accordingly increases the occupied space of the soft-packed cell, and the cell components The number of soft-packed cells that can be connected in the middle and/or the size of a single soft-packed cell is increased, thereby improving the space utilization rate of the cell assembly in a given space and improving the volumetric energy density.

According to an embodiment, a connection circuit is also printed on the battery protection board 130 , and the connection circuit is used to realize the series or parallel connection of the soft-packed cells 120 . In this way, the series-parallel connection of the soft-packed cells 120 can be realized by the connection circuit on the adapter board 110 and the connection circuit on the battery protection board 130 in combination.

In other embodiments, the connection between the soft-packed cells 120 (ie, the series-parallel connection between the cells) and the electrical connection between the soft-packed cells 120 and the battery protection board 130 may be made of electrical conductors (such as extended cells). The polar tabs or extra wires) are directly connected, that is, the positive and negative electrodes of the plurality of soft-packed cells 120 are electrically connected to the battery protection board 130 through conductors. In these embodiments, the connecting circuit may not be provided on the adapter board 110 . Each side surface of the adapter plate 110 is respectively coupled to the conductor on the same side with the conductor only on the side surface, so as to provide structural support and/or insulation protection to the conductor. In this way, the space in the length direction of the cell assembly occupied by the adapter plate can be further reduced, thereby further improving the space utilization rate of the cell assembly in a given space, and further improving the volumetric energy density.

In the above embodiment in which the adapter plate 110 and the conductor are structurally coupled, a connection circuit may be printed on the battery protection plate 130 , and the connection circuit is used to realize the series or parallel connection of the soft-packed cells 120 . In other words, the series-parallel connection of the soft-packed cells 120 can be realized through the connection circuit on the battery protection board 130 .

The shape of the adapter plate can be various under the premise of satisfying the space limitation of the battery module. The adapter plate in the embodiment shown in FIG. 3 is rectangular, and may also be circular, rhombus, irregular, or the like.

It should be noted that two embodiments in which the adapter plate 110 is coupled with the soft-covered cells on both sides of the adapter plate 110 are given above. One is that the adapter plate is electrically connected to the soft-covered cells on both sides of the adapter plate, and the other is The interposer is structurally coupled to the electrical conductor. It should be noted that "connected" in the following refers to electrical connections unless otherwise specified.

On the basis of the above-mentioned cell assembly 100 , the present disclosure further provides a battery module 200 . The battery module 200 includes the above-mentioned cell assembly 100 and a cylindrical structural member 250 covering the outside of the cell assembly 100. The axis of the cylindrical structural member 250 is perpendicular to the stacking direction of the soft-wrapped cells in the cell assembly 100 (ie perpendicular to the first stacking direction).

FIG. 6 shows a cross-sectional view of the cylindrical structure 250 perpendicular to its axis. It should be understood that although the cross-section of the cylindrical structural member 250 shown in FIG. 6 is circular, the present disclosure does not limit the shape of the cross-section of the cylindrical structural member 250 perpendicular to the axis, and the cross-section may be circular or square. , polygonal or irregular shape, and the shape of the cross-section of the cylindrical structure 250 at different positions may be different.

According to an embodiment, a flexible buffer material is filled between the wall of the cylindrical structure 250 and the side surfaces of the plurality of stacked pouch cells 120 and between the adjacent pouch cells 120 , so that the pouch cells 120 are subjected to Protect it from being hit or pierced. For example, in FIG. 6 , the side surfaces formed by the stacked soft-covered cells 120 are shown as two dashed lines 251 and 252 . And a flexible buffer material is filled between each pair of adjacent soft-covered cells 120 . The flexible buffer material may be, for example, foam, rubber, etc., but is not limited thereto.

According to an embodiment, as shown in FIG. 6 , the wall of the cylindrical structural member 250 is provided with a first limiting plate 253 , and a plurality of stacked soft-covered cells 120 are disposed on a first position parallel to the axis of the cylindrical structural member 250 . on the limit plate 253 . The stacked soft-packed cells 120 may be disposed on the first limiting plate 253 by, for example, bonding.

According to an embodiment, as shown in FIG. 6 , the wall of the cylindrical structural member 250 is further provided with a second limiting plate 254 parallel to the first limiting plate 253 , and a plurality of stacked soft-covered cells 120 are arranged on the first limiting plate 253 . between a limiting plate 253 and a second limiting plate 254 . The first limiting plate 253 and the second limiting plate 254 are used to limit the position of the soft-packed battery cell 120 in the vertical direction, so as to avoid displacement after being hit.

It should be noted that the specific shapes of the first limiting plate 253 and the second limiting plate 254 are not limited.

According to an embodiment, the cylindrical structural member 250 includes a plurality of shell pieces, and the plurality of shell pieces are snap-fastened. It should be noted that the present disclosure does not limit the number of shell pieces included in the tubular structure 250 and the division manner of the shell pieces.

For example, as shown in FIG. 6 , the cylindrical structure 250 divides the cylindrical structure 250 into two shell pieces along the direction indicated by the straight line 255 (ie, the first stacking direction of the soft-packed cells 120 ). fixed. As another example, the cylindrical structural member 250 may divide the cylindrical structural member 250 into two shell pieces along the direction shown by the line 256. For another example, the tubular structure 250 can be divided into two or more shell pieces (not shown in FIG. 6 ) along any cross-section perpendicular to its axis, and each shell piece can be snap-connected by rotating way fixed.

According to an embodiment, a plurality of stacked soft-packed cells 120 form at least one cell group (as shown in FIG. 6 , four soft-packed cells 120 are stacked to form one cell group), and the walls of the cylindrical structure 250 Recesses 257 are provided, which are configured to accommodate the sides of the cell packs that are parallel to the axes. The recess 257 may be formed, for example, by reducing the wall thickness of the wall of the cylindrical structure 250, or by a notch in the wall.

By arranging depressions on the wall of the cylindrical structure, the accommodating space inside the cylindrical structure is increased, so that the cylindrical structure can accommodate larger size or more soft-packed cells, thereby improving the battery model. The volumetric energy density of the group.

7A to 8 illustrate a battery module 300 of a second embodiment of the present disclosure. The battery module 300 includes a plurality of soft-packed cells 420 and a cylindrical structural member 350 covering the outside of the soft-packed cells 420 . A plurality of soft-packed cells 420 are stacked to form at least one cell group, and the axis of the cylindrical structure 350 is perpendicular to the stacking direction of the soft-packed cells 420 in each cell group. The wall of the cylindrical structure 350 is provided with a recess, which is configured to accommodate the side edges of the above-mentioned cell group that are parallel to the above-mentioned axis.

For example, as shown in FIGS. 7A and 7B , two soft-packed cells 420 form a cell group, and the cell group has four sides parallel to the axis of the cylindrical structure 350 , namely the letters A and B in the figure. The four sides pointed to by , C, and D. The walls of the cylindrical structure 350 are provided with recesses (recess 351 in FIG. 7A and recess 352 in FIG. 7B ) configured to accommodate the sides A, B, C, D.

It should be understood that although the cross section of the cylindrical structure 350 shown in FIGS. 7A and 7B is circular, the present disclosure does not limit the shape of the cross section of the cylindrical structure 350 perpendicular to the axis, and the cross section may be circular , square, polygon or irregular shape, and the shape of the cross-section of the cylindrical structure 350 at different positions may be different.

According to an embodiment, the recesses provided on the wall of the cylindrical structural member 350 may be formed by reducing the wall thickness of the wall, for example. As shown in FIG. 7A , the wall of the cylindrical structural member 350 is provided with a recess 351 formed by reducing the wall thickness of the wall. Two soft-packed cells 420 are stacked to form a cell group, and the recess 351 is configured to accommodate the sides of the cell group that are parallel to the axis of the cylindrical structure 350 , that is, the recess 351 is configured to accommodate the sides A, B , C, D. It should be noted that, in the embodiment shown in FIG. 7A , the top corners of the soft-packed cells 420 are arc-shaped, and correspondingly, the sides A, B, C, and D of the cell group formed by stacking the soft-packed cells 420 On the radial section of the cylindrical structural member 350 , an arc-shaped angle is presented. In other embodiments, the top angle of the soft-packed cells 420 may also be a right angle. Correspondingly, the side of the cell group formed by stacking the soft-packed cells 420 that is parallel to the axis of the cylindrical structural member 350 is in the cylindrical structure. The radial cross section of the piece 350 presents a right angle.

According to another embodiment, the recess provided on the wall of the cylindrical structural member 350 may be formed by, for example, a notch on the wall. As shown in FIG. 7B , the wall of the cylindrical structural member 350 is provided with a recess 352, and the recess 352 is formed by a notch on the wall. Two soft-packed cells 420 are stacked to form a cell group, and the recess 352 is configured to accommodate the sides of the cell group that are parallel to the axis of the cylindrical structure 350 , that is, the recess 352 is configured to accommodate the sides A, B , C, D. It should be noted that, in the embodiment shown in FIG. 7B , the top corners of the soft-packed cells 420 are arc-shaped, and correspondingly, the sides A, B, C, and D of the cell group formed by stacking the soft-packed cells 420 An arc-shaped angle is presented on the radial section of the cylindrical structural member 350 . In other embodiments, the top angle of the soft-packed cells 420 may also be a right angle. Correspondingly, the side of the cell group formed by stacking the soft-packed cells 420 that is parallel to the axis of the cylindrical structural member 350 is in the cylindrical structure. The radial cross section of the piece 350 presents a right angle.

By arranging depressions on the wall of the cylindrical structure, the accommodating space inside the cylindrical structure is increased, so that the cylindrical structure can accommodate larger size or more soft-packed cells, thereby improving the battery model. The volumetric energy density of the group.

According to an embodiment, a flexible buffer material is filled between the wall of the cylindrical structural member 350 and the side surfaces of the cell group formed by stacking a plurality of soft-packed cells 420 and between adjacent soft-packed cells 420, so that the soft-packed cells 420 are filled with a flexible buffer material. The cells 420 are protected from being hit or punctured. For example, in FIGS. 7A and 7B , two soft-covered cells 420 are stacked to form a cell group, and the sides of the cell group are shown by two dashed lines, within the space between the wall of the cylindrical structural member 350 and the dashed lines. , and each pair of adjacent soft-covered cells 420 is filled with a flexible buffer material. The flexible buffer material may be, for example, foam, rubber, etc., but is not limited thereto.

According to an embodiment, as shown in FIGS. 7A and 7B , the wall of the cylindrical structural member 350 is provided with a first limiting plate 353 , and the cell group formed by stacking a plurality of soft-packed cells 420 is disposed parallel to the cylindrical structure. on the first limiting plate 353 of the axis of the component 350 . For example, the battery cell group can be disposed on the first limiting plate 353 by means of bonding.

According to an embodiment, as shown in FIGS. 7A and 7B , the wall of the cylindrical structural member 350 is further provided with a second limiting plate 354 parallel to the first limiting plate 353 , and a plurality of soft-packed cells 420 The stack of battery cells is disposed between the first limiting plate 353 and the second limiting plate 354 . The first limit plate 353 and the second limit plate 354 are used to limit the position of the soft-packed battery cell 420 in the vertical direction, so as to avoid displacement after being hit.

It should be noted that the specific shapes of the first limiting plate 353 and the second limiting plate 354 are not limited.

According to an embodiment, the cylindrical structural member 350 includes a plurality of shell pieces, and the plurality of shell pieces are snap-fastened. It should be noted that the present disclosure does not limit the number of shell pieces included in the tubular structure 350 and the division manner of the shell pieces.

For example, as shown in FIGS. 7A and 7B , the cylindrical structural member 350 is divided into two shell pieces along the vertical direction in the cross section (ie, the first stacking direction of the soft-packed cells 420 ), and the two shell pieces are snap-fitted and fixed. The dotted rectangular box in the figure shows the snap joints of the two shell pieces. For another example, the cylindrical structure 350 may be divided into two shell pieces (not shown in Figs. 7A, 7B ) along the horizontal direction in the cross section. For another example, the cylindrical structural member 350 can be divided into two or more shell pieces (not shown in FIGS. 7A and 7B ) along any cross-section perpendicular to its axis, and each shell piece can be fixed by rotating and snapping .

It should be noted that, in the embodiments of the present disclosure, the structures wrapped in the cylindrical structural member 350 of the battery module 300 are collectively referred to as the battery core assembly 400 , and the battery module 300 includes the cylindrical structural member 350 and the cylindrical structure The cell assembly 400 inside the device includes a soft-wrapped cell 420 .

According to an embodiment, as shown in FIGS. 8 to 10 , the cell assembly 400 further includes a battery protection board 430 , and the battery protection board 430 is electrically connected to the soft-packed cells 420 through the conductors 440 .

According to one embodiment, one end of the conductor 440 is electrically connected to the battery protection plate 430, and the other end is electrically connected to the electrode (positive or negative electrode) of the soft-packed cell 420, so as to electrically connect the battery protection plate 430 to the soft-packed cell 420. For example, as shown in FIG. 9 , the upper end of the conductor 440 passes through the battery protection plate 430 and is bent, and is electrically connected to the battery protection plate 430 at the bent portion, specifically, is electrically connected to the circuit on the battery protection plate 430 (circuit not shown in Figure 9). The lower ends of the conductors 440 are electrically connected to the electrodes of the soft-packed cells 420 , so as to electrically connect the battery protection plate 430 to the soft-packed cells 420 .

The battery protection board 430 can be, for example, an integrated circuit board, which is used for charging management and protection of the soft-packed cells 420 to avoid overcharge, over-discharge, over-current, short-circuit and the like of the soft-packed cells 420 . According to an embodiment, in order to make the structure of the cell assembly 400 other than the soft-packed cells 420 occupy less space and save more space to accommodate the soft-packed cells 420 , the battery protection board 430 is set to It is parallel to the second stacking direction of the soft-packed cells 420 , that is, the plane where the battery protection plate 430 is located is parallel to the axis of the cylindrical structure 350 . In this embodiment, referring to FIG. 8 , the plane where the battery protection plate 430 is located is parallel to the axis of the cylindrical structure 350 , in other words, the plane where the battery protection plate 430 is located is in the second stacking direction of the pouch cells 420 ( FIG. 9 ). The direction indicated by the arrow a in the middle) is parallel.

In some embodiments, the electrical conductors 440 may have a sheet-like structure, and the present disclosure does not limit the number and specific materials of the electrical conductors 440 . According to one embodiment, the electrical conductors 440 include at least one of: wires, copper sheets, nickel sheets, printed circuit boards, flexible circuit boards, and sheet-board connectors.

According to an embodiment, as shown in FIG. 10 , the cell assembly 400 further includes an adapter plate 410 , the battery protection board 430 is electrically connected to the adapter plate 410 through the conductor 440 , and the adapter plate 410 is electrically connected to the soft-packed cells 420. Specifically, one end of the conductor 440 is electrically connected to the circuit on the upper surface of the battery protection board 430, and the other end is electrically connected to the circuit on the left side surface of the adapter plate 410 (the circuits on the battery protection board 430 and the adapter board 410 are not shown in FIG. 10 ), thereby electrically connecting the battery protection board 430 to the interposer board 410 . The adapter plate 410 is electrically connected to the positive and negative electrodes of the soft-packed cell 420 . Those skilled in the art should understand that the connection manner of the conductors 440 in FIG. 10 is only an example. In other embodiments, other connection manners may also be used to electrically connect the conductor 440 to the adapter board 410 and the battery protection board 430. For example, one end of one conductor 440 may be electrically connected to the circuit on the upper surface of the battery protection board 430, and the other end may be electrically connected to the circuit on the left surface of the adapter plate 410; one end of the other conductor 440 may be electrically connected to the battery protection board The circuit on the upper surface of the board 430 is electrically connected, and the other end is electrically connected with the circuit on the right surface of the adapter board 410 . Alternatively, the conductor 440 can also be arranged near the adapter plate 410 and the battery protection plate 430, and the two ends of the conductor 440 are directly electrically connected to the circuits of the adapter plate 410 and the battery protection plate 430, respectively, without having to be as shown in the figure. The conductor 440 is bent at the edge of the adapter plate 410 as shown in FIG. 10 , and the bent end is connected to the circuit on the upper surface of the battery protection plate 430 . According to an embodiment, the plane where the adapter plate 410 is located is parallel to the stacking direction of the soft-packed cells.

According to an embodiment, a connection circuit is printed on the adapter board 410 and/or the battery protection board 430 , and the connection circuit is used to realize the series or parallel connection of the soft-packed cells 420 . In other words, the series-parallel connection of the soft-packed cells 420 can be realized only through the connection circuit on the adapter board 410 , or only through the connection circuit on the battery protection board 430 , or through the connection circuit on the adapter board 410 and the battery protection board 430 . The connection circuit is implemented jointly.

The battery protection board is electrically connected to the soft-packed cells through the conductors, or the battery protection board is electrically connected to the adapter board through the conductors, and the adapter board is electrically connected to the soft-packed cells. Compared with ordinary cables, the space occupied by the conductor is smaller, and accordingly, the available space of the battery module is increased, and the number of soft-packed cells that can be connected to the battery module and/or the size of a single soft-packed cell is increased. The size is increased, thereby improving the space utilization rate of the battery module in a given space and improving the volumetric energy density. The shape of the adapter plate can be various under the premise of satisfying the space limitation of the battery module. The adapter plate in the embodiment shown in FIG. 10 is rectangular, and may also be circular, diamond, irregular, or the like.

It should be understood that, in this embodiment, the number of the adapter boards may not be limited to a single one. For example, two transfer boards may be used, and the soft-covered cells on one side are stacked and arranged on one side of a single transfer board along the first stacking direction. Then connect the two adapter boards through conductors, or connect them with the battery protection board.

The above-mentioned second embodiment of the present disclosure provides a recess on the wall of the cylindrical structural member, thereby increasing the accommodating space inside the cylindrical structural member, so that the cylindrical structural member can accommodate a larger size or a larger number of soft packs cells, thereby increasing the volumetric energy density of the battery module.

According to an embodiment, the technical features in the first embodiment and the second embodiment of the present disclosure can be combined arbitrarily, so that the volumetric energy density of the battery module can be further improved. For example, the battery module can not only be coupled with the soft-packed cells on both sides of the battery module through a single adapter plate, but also can be provided with depressions on the wall of the cylindrical structure, so that the battery module can superimpose the beneficial technical effects of the two, so that the The volumetric energy density of the battery module is further improved. As shown in FIGS. 7A , 7B and 10 , a plurality of soft-wrapped cells 420 are stacked on one side of the adapter plate 410 along a first stacking direction to form a single cell group. The two cell groups on both sides of the adapter plate 410 are electrically connected to the adapter plate 410 along the second stacking direction. The adapter plate 410 is electrically connected with the battery protection plate 430 through the conductor 440 to form the cell assembly 400. In this embodiment, the length of the cell assembly 400 is close to the length of the holding portion of the handheld electrical device, the width is close to the width of the holding portion, and has a thickness that can be placed in the holding portion. The cell assembly 400 is installed along the axial direction of the cylindrical structural member 350 , and its arc-shaped vertex angles (A, B, C, D) are located at the recesses ( 351 or 352 ) on the wall of the cylindrical structural member 350 . The cell assembly 400 is disposed between the first limiting plate 353 and the second limiting plate 354 . The above structure improves the space utilization rate in terms of the length and width of the internal space of the battery module.

Based on the battery module of the above-mentioned embodiment of the present disclosure, the present disclosure also provides a handheld electrical device applying the above-mentioned battery module. Handheld electrical equipment includes but is not limited to vacuum cleaners, beauty instruments, hair dryers, fascia guns, etc.

The hand-held electrical equipment includes a working part, a holding part, and a battery module provided by the present disclosure (eg, the above-mentioned battery module 200 , battery module 300 , etc.). The holding part includes an accommodating cavity, and the battery module is fixed in the accommodating cavity. The battery module supplies power to the working part. In some embodiments, a large portion of the battery module is contained within the housing cavity and a small portion is contained within the working portion.

It should be noted that the present disclosure does not limit the fixing manner of the battery module in the accommodating cavity. According to an embodiment, the battery module is replaceably fixed in the accommodating cavity. This replaceable fixing method can be, for example, snap connection; or, when the size of the battery module and the accommodating cavity can be closely matched, the battery module can be inserted into the accommodating cavity to realize the fixing, and no additional fixing parts are required. . Such a fixing manner is beneficial for replacing the battery module during daily use or maintenance of the handheld electrical device, prolonging the service life of the device and improving the safety level of the device.

According to one embodiment, in addition to the above-mentioned working part, grip part and battery module, the hand-held electrical device further includes an interface for charging and/or discharging the battery module. The battery module is charged and/or discharged through the interface.

While embodiments of the present disclosure have been described with reference to the accompanying drawings, it should be understood that the scope of the present disclosure is not limited by these embodiments or examples, but only by the appended claims and their equivalents. Various elements of the embodiments or examples may be omitted or replaced by equivalents thereof. It should also be understood that, as technology evolves, many of the elements described herein may be replaced by equivalent elements that appear after this disclosure.

Claims (32)

A cell assembly, comprising: an adapter plate and a plurality of soft-covered cells; The plurality of soft-packed cells are stacked and arranged on both sides of the adapter board; Each side surface of the adapter plate is respectively coupled with the positive and negative electrodes of the soft-packed cells on the same side only on the side surface. The cell assembly according to claim 1, wherein a positive coupling point and a negative coupling point are provided on each side surface of the adapter plate, and the positive coupling point and the negative coupling point are respectively only the soft The positive and negative electrodes of the battery pack are coupled to each other. The battery cell assembly of claim 1, further comprising a battery protection board; The positive and negative electrodes of the soft-packed cells on the same side of each side surface of the adapter plate are electrically connected only on the side surface; The adapter board is electrically connected to the battery protection board through a conductor. The battery cell assembly of claim 1, further comprising a battery protection board; The positive and negative electrodes of the plurality of soft-packed cells are electrically connected to the battery protection board through conductors; Each side surface of the adapter plate is respectively coupled with the conductor on the same side only on the side surface structure, and plays the role of structural support and/or insulation protection for the conductor. The cell assembly of claim 3 or 4, wherein the electrical conductor comprises at least one of the following: a wire, a copper sheet, a nickel sheet, a printed circuit board, a flexible circuit board, and a sheet-like connector. The cell assembly of claim 1, wherein, The plane on which the adapter plate is located is parallel to the stacking direction of the soft-covered cells. The cell assembly of claim 3 or 4, wherein, The plane where the battery protection board is located is perpendicular to the plane where the adapter plate is located. The cell assembly of claim 2, wherein, A connection circuit is printed on the adapter board, and the connection circuit is used to realize the series-parallel connection between the soft-packed cells located on both sides of the adapter board. The cell assembly according to claim 3 or 4, wherein, A connection circuit is printed on the battery protection board, and the connection circuit is used to realize series or parallel connection of soft-packed cells. A battery module, comprising: the cell assembly according to any one of claims 1-9 and a cylindrical structural member wrapped outside the cell assembly, the axis of the cylindrical structural member It is perpendicular to the stacking direction of the soft-wrapped cells in the cell assembly. The battery module of claim 10, wherein, A flexible buffer material is filled between the wall of the cylindrical structure and the side surfaces of the plurality of stacked soft-packed cells and between adjacent soft-packed cells. The battery module of claim 10, wherein, The wall of the cylindrical structure is provided with a first limiting plate, and a plurality of stacked soft-covered cells are arranged on the first limiting plate parallel to the axis. The battery module of claim 12, wherein, The wall of the cylindrical structural member is further provided with a second limit plate parallel to the first limit plate, and the plurality of stacked soft-packed cells are arranged on the first limit plate and the second limit plate. between the boards. The battery module of claim 10, wherein, The cylindrical structural member includes a plurality of shell pieces, and the plurality of shell pieces are clamped and fixed. The battery module of claim 10, wherein, A plurality of stacked soft-wrapped cells form at least one cell pack, and walls of the cylindrical structure are provided with recesses configured to receive sides of the cell pack that are parallel to the axis. A battery module, comprising: a plurality of soft-packed cells and a cylindrical structural member covering the outside of the plurality of soft-packed cells, the plurality of soft-packed cells are stacked to form at least one cell group, and the The axis of the cylindrical structure is perpendicular to the stacking direction of the soft-covered cells in each cell group; The wall of the cylindrical structure is provided with a recess, the recess is configured to receive the side of the cell group parallel to the axis. The battery module of claim 16, wherein, The depressions are formed by reducing the wall thickness of the walls. The battery module of claim 16, wherein, The recess is formed by a notch in the wall. The battery module of claim 16, wherein, A flexible buffer material is filled between the wall of the cylindrical structure and the side surface of the cell group and between adjacent soft-packed cells. The battery module of claim 16, wherein, The wall of the cylindrical structure is provided with a first limiting plate, and the cell group is arranged on the first limiting plate parallel to the axis. The battery module of claim 20, wherein, The wall of the cylindrical structure is further provided with a second limit plate parallel to the first limit plate, and the battery cell group is arranged between the first limit plate and the second limit plate. The battery module of claim 16, wherein, The cylindrical structural member includes a plurality of shell pieces, and the plurality of shell pieces are clamped and fixed. The battery module of claim 16, further comprising a battery protection board, the battery protection board is electrically connected to the soft-packed cells through a conductor. The battery module of claim 23, further comprising an adapter plate; The battery protection board is electrically connected to the transfer board through a conductor, and the transfer board is electrically connected to the soft-packed battery cells. The battery module of claim 23 or 24, wherein the electrical conductor comprises at least one of the following: Wire, copper, nickel, printed circuit board, flexible circuit board or sheet-to-board connectors. The battery module of claim 23, wherein, The plane on which the battery protection plate is located is parallel to the axis of the cylindrical structure. The battery module of claim 24, wherein, The plane on which the adapter plate is located is parallel to the stacking direction of the soft-covered cells. The battery module of claim 24, wherein, A connection circuit is printed on the adapter board and/or the battery protection board, and the connection circuit is used to realize series or parallel connection of soft-packed cells. A hand-held electrical device, comprising: a working part, a holding part and the battery module according to any one of claims 10-28; The holding part includes an accommodating cavity, and the battery module is fixed in the accommodating cavity; The battery module supplies power to the working part. The handheld electrical device of claim 29, further comprising an interface for charging and/or discharging the battery module. The handheld electrical device according to claim 29, wherein the battery module is replaceably fixed in the accommodating cavity. The handheld electrical device according to claim 29, comprising: a vacuum cleaner, a beauty instrument, a hair dryer, and a fascia gun.

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