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WO2022188968A1 - Ensemble présentant un élément conducteur de chaleur à compensation de tolérance, batterie et procédé d'installation de cellules de batterie dans un boîtier de batterie au moyen d'un élément conducteur de chaleur à compensation de tolérance - Google Patents

Ensemble présentant un élément conducteur de chaleur à compensation de tolérance, batterie et procédé d'installation de cellules de batterie dans un boîtier de batterie au moyen d'un élément conducteur de chaleur à compensation de tolérance Download PDF

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Publication number
WO2022188968A1
WO2022188968A1 PCT/EP2021/056071 EP2021056071W WO2022188968A1 WO 2022188968 A1 WO2022188968 A1 WO 2022188968A1 EP 2021056071 W EP2021056071 W EP 2021056071W WO 2022188968 A1 WO2022188968 A1 WO 2022188968A1
Authority
WO
WIPO (PCT)
Prior art keywords
tolerance
battery
base body
conducting element
compensating heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2021/056071
Other languages
German (de)
English (en)
Inventor
Patrick Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Priority to PCT/EP2021/056071 priority Critical patent/WO2022188968A1/fr
Priority to DE112021007231.5T priority patent/DE112021007231A5/de
Publication of WO2022188968A1 publication Critical patent/WO2022188968A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to an arrangement with a tolerance-compensating heat-conducting element. Furthermore, the invention relates to a battery and a method for installing battery cells in a battery housing by means of a tolerance-compensating heat-conducting element.
  • a battery in particular a lithium-ion battery, has at least one battery module or advantageously a plurality of battery modules.
  • Each battery module has a battery housing and several battery cells, in particular configured as pouch cells, prismatic cells or round cells, the battery cells preferably being combined to form a battery cell stack and connected to one another in series and/or in parallel.
  • the battery cells are arranged in a fixed manner in the battery housing, with the battery housing usually having a pot-shaped base body and a cover.
  • the battery housing has a base body that is designed as an extruded profile and is open at the front, with the two open front sides of the base body being closable by a cover each.
  • the battery cells are arranged inside the base body.
  • a battery housing is also to be understood as meaning a battery module housing if the battery is composed of a plurality of battery modules.
  • the fixed arrangement of the battery cells in the battery housing is achieved, among other things, by a potting compound, the battery cells being inserted into the battery housing and the cavity between the inner surface of the battery housing and the battery cells being filled directly with the potting compound.
  • a placeholder corresponding to the battery cells can also be used, with the placeholder being inserted into the battery housing, the cavity between the placeholder and the inner surface of the battery housing being filled with the casting compound, the placeholder being removed and finally the battery cells being inserted into the area of the placeholder will.
  • a configuration of a battery module with a casting compound is disclosed, for example, in WO 2008/104356 A1.
  • the potting compound is also used to thermally connect the battery cells to the battery housing.
  • the thermal connection of the battery cells to the battery housing is necessary because the battery cells heat up during operation, ie during discharging and charging, and have to be cooled in order to avoid thermal overload.
  • thermally conductive particles in particular metallic particles, are embedded in the casting compound, as a result of which the thermal conductivity of the casting compound is increased.
  • a disadvantage of a potting compound with embedded particles to increase the thermal conductivity is that the embedded particles increase the viscosity of the potting compound, thereby processing, ie filling the Potting compound is made more difficult.
  • the high viscosity makes it considerably more difficult to fill the casting compound into a narrow gap.
  • the object is therefore to provide an arrangement with a tolerance-compensating element, in which case the heat transfer and the tolerance compensation between two components should take place in a simple and cost-effective manner. This object is achieved by an arrangement with the features of main claim 1.
  • the arrangement comprises a first component and a second component which are mounted at a distance from one another. Both components have manufacturing-related deviations, which are permissible within a certain tolerance. Furthermore, the components are assembled in the assembly process with predefined assembly tolerances. In order to compensate for the manufacturing and assembly tolerances in the assembled state of the components, a tolerance-compensating element is provided, which is inserted into a gap between the two components.
  • the first component is designed in such a way that it heats up during operation, with the heat that is produced having to be dissipated.
  • the tolerance-compensating element is designed to be heat-conducting, ie it is a heat-conducting element, with the heat being transferred from the first component to the second component via the tolerance-compensating heat-conducting element.
  • the second component is cooled in particular by a cooling device.
  • the tolerance-compensating heat-conducting element has a base body and a casting compound.
  • the base body lies with a first side on the first component and with a first side opposite, second side on the second component, wherein at least one resilient element is provided on the second side, which rests prestressed on the second component.
  • the spring element is prestressed by assembling the base body or by pushing the base body into the gap existing between the first component and the second component, with the assembly of the base body with the prestressed spring element compensating for the manufacturing and assembly-related tolerances .
  • the casting compound completely fills the gap between the two components, in which the base body is already arranged, as a result of which there is a final and fixed positioning of the second component relative to the first component.
  • the base body is almost completely embedded in the casting compound, with the contact surface of the base body that rests on the first component and the second component not being covered by the casting compound and the base body rests directly on the components.
  • the base body is also used for heat transfer, with the base body having a high thermal conductivity in comparison to the casting compound. Because the base body is in contact with both components, the first component is thermally coupled to the second base body via the base body, which has high thermal conductivity. Heat is also transferred via the casting compound, but this is relatively low compared to the base body.
  • the thermal conductivity is significantly increased, in particular doubled or tripled, compared to the potting compound as such. With such a tolerance-compensating heat-conducting element, the manufacturing and assembly-related deviations can be compensated and adequate heat transfer between the first component and the second component can be guaranteed.
  • the base body has a plurality of resilient elements and a connecting section lying against the first component, the resilient elements being fastened to the connecting section with a first end and lying against the second component with an opposite, free end in each case.
  • the base body rests against the first component with the connecting section.
  • the base body rests against the second component with a plurality of resilient elements. Due to the fact that several resilient elements are provided, the heat transfer of the base body and thus of the tolerance-compensating heat-conducting element can be increased.
  • the base body is designed in one piece, as a result of which the manufacturing effort can be reduced because individual components do not have to be assembled.
  • the base body is preferably made of metal, with a metal base body having a relatively high thermal conductivity and being able to be produced inexpensively.
  • the base body is made of copper, with copper having a high thermal conductivity. As a result, the heat transfer between the first component and the second component can be increased.
  • the base body is preferably made from a stamped and bent sheet metal part.
  • the base body is made from sheet metal, with the resilient element being cut free, for example, by a U-shaped cut and by bending it up or down through the U-shaped cut area is produced. In this way, the base body can be manufactured simply and inexpensively, the sheet metal being a relatively inexpensive basic element and the stamping and bending of the sheet metal being simple and inexpensive manufacturing processes.
  • the casting compound is made from polyurethane.
  • the polyurethane has good stability with a relatively low weight.
  • the casting compound preferably has thermally conductive particles.
  • the thermally conductive particles are, in particular, metallic or ceramic particles which are embedded in a base mass of the casting compound. The amount of particles is selected in such a way that the viscosity of the casting compound is still relatively low, so that the casting compound can be processed in a simple manner despite the thermally conductive particles.
  • the thermal conductivity of the base body is higher than the thermal conductivity of the potting compound.
  • the high heat transfer is mainly achieved by the high thermal conductivity of the base body, the casting compound having a low viscosity due to the lower thermal conductivity and thus no or few embedded, thermally conductive particles and is therefore easy to process.
  • the base body preferably has an electrically insulating coating. This prevents an electrical connection being established between the two components.
  • the first component can be, for example, an element through which an electric current flows
  • the second component can be, for example, an associated housing.
  • the housing should never have an electric current flowing through it.
  • the electrically insulating coating is an electrically non-conductive lacquer, the lacquer having a relatively small layer thickness.
  • a battery which has a battery housing, a plurality of battery cells which are arranged in the battery housing, and a tolerance-compensating heat-conducting element according to one of claims 1 to 11, wherein the tolerance-compensating heat-conducting element is in a gap between an inner wall surface of the battery housing and a battery cell directly adjacent to the inner wall surface or in a gap between two adjacent battery cells.
  • the battery cell directly adjacent to the inner wall surface can be regarded as the first component according to claims 1 to 11.
  • the battery housing is the second component.
  • the battery case is designed such that when the battery cells are assembled, there is a gap between the battery cell adjacent to the inner wall surface of the battery case and the inner wall surface of the battery case.
  • the battery cells are finally fixed via the tolerance-compensating heat-conducting element, with the battery cells being clamped by the base body between the two side walls of the battery housing and then finally fixed in the clamped position by the casting compound.
  • the base body and the potting compound also serve to conduct heat between the battery cells and the Battery housing, wherein the tolerance-compensating heat-conducting element, in particular through the base body, has a high thermal conductivity.
  • the object is also achieved by a method for installing battery cells in a battery housing by means of a tolerance-compensating heat-conducting element according to one of claims 1 to 11, the method having the following steps:
  • the battery cells can be reliably positioned in the battery housing and heat transfer between the battery cells and the battery housing can be provided in a simple and cost-effective manner.
  • An arrangement with a tolerance-compensating heat-conducting element, a battery and a method are provided by which the first component and the second component can be reliably positioned relative to one another or the battery cells in the battery housing, with sufficient heat transfer between the two components or between the battery cells and the battery housing can be guaranteed.
  • An embodiment of an arrangement according to the invention is shown in the figure and is described below.
  • FIG. 1 shows a sectional illustration of a battery with a tolerance-compensating heat-conducting element according to the invention.
  • the figure shows a battery 10.
  • the battery 10 comprises a battery housing which has a prismatic base body 14 and a cover 16.
  • the prismatic base body 14 and the cover 16 delimit an interior space 18 that is sealed off from the environment.
  • a cooling plate 20 is arranged on a side of a base of the prismatic, top-shaped base body 14 that faces away from the interior space 18 the battery 10 is cooled.
  • the cooling channel 21 is fluidically connected to a cooling circuit, not shown in the figure.
  • the battery housing can have a base body with two open end faces, the open end faces being closed by a respective cover.
  • the cooling plate is arranged on a top section or a bottom section of the base body.
  • a battery cell pack 22 is arranged in the interior 18 of the battery housing.
  • the battery cell pack 22 has a large number of prismatic battery cells 241, 242, 243, 244, 245, 246, 247, 248 which are arranged next to one another and are electrically connected to one another in series and/or in parallel.
  • the battery cells 241, 242, 243, 244, 245, 246, 247, 248 are usually added to the battery cell pack 22 and used as a whole in the interior 18 of the battery housing 12.
  • the interior space 18 or the distance between the two side walls of the base body 14 is designed such that when an end of the battery cell pack 22 facing towards a first side wall is in contact with a second side wall facing end of the battery cell pack 22 is spaced from the side wall, so that a gap 28 between an inner surface of the side wall and the inner surface directly adjacent battery cell 241, namely a second component, is present. Insertion of the battery cell pack 22 into the battery housing 13 is only possible with such a configuration. Otherwise, the manufacturing and assembly tolerances could result in the battery cell pack 22 being made wider than the interior space 18, which would make it impossible for the battery cell pack 22 to be inserted into the interior space 18
  • a tolerance-compensating heat-conducting element 30 is inserted into the gap 28 .
  • the tolerance-compensating heat-conducting element 30 has a metallic base body 32 which has a connecting section 34 and a plurality of resilient elements 361, 362, 363, 364, 365.
  • the base body 32 is a one-piece bent sheet metal part and is made of copper.
  • the base body 32 has an electrically non-conductive coating 38 in the form of paint.
  • the tolerance-compensating heat-conducting element 30 has a casting compound 40 which is made from polyurethane and has thermally conductive, metallic particles.
  • the base body 32 is completely embedded in the casting compound 40, with the exception of the contact surfaces between the base body 32 and the inner surface of the battery housing 12 and the contact surfaces between the base body 32 and the battery cell 241.
  • the base body 32 of the tolerance-compensating heat-conducting element 30 into the gap 28 .
  • the resilient elements 361 are deformed, 362, 363, 364, 365 and are thereby biased.
  • the preload of the resilient elements 361, 362, 363, 364, 365 loads the battery cell pack 22 in such a way that it is pressed against the other side wall and is thereby clamped between the tolerance-compensating heat-conducting element 30 and the side wall.
  • the sealing compound 40 is then filled into the gap 28, which finally and rigidly fixes the battery cell stack 22 after curing.
  • the tolerance-compensating heat-conducting element 30 has good heat transfer between the battery cell 241 and the battery housing 12 . Furthermore, the casting compound 40 has thermally conductive particles to increase the thermal conductivity, the thermal conductivity of the
  • Base body 32 is higher than the thermal conductivity of the potting compound 40.
  • the heat generated during operation of the battery cells 241, 242, 243, 244, 245, 246, 247, 248, i.e. during discharging and charging can be reliably dissipated to the battery housing, with the battery housing 12 being cooled by the cooling plate 20.
  • the tolerance-compensating heat-conducting element 30 the deviations caused by manufacturing and assembly can be compensated for and sufficient heat transfer between the first component, i.e. the battery cell pack 22, and the second component, i.e. the battery housing 12, can be ensured.
  • such a tolerance-compensating heat-conducting element 30 has low production costs and can be arranged in a gap 28 in a simple manner.
  • the tolerance-compensating heat-conducting element 30 or the battery housing 12 can be designed differently.
  • the tolerance-compensating heat-conducting element 30 could be arranged between two battery cells 241, 242, 243, 244, 245, 246, 247, 248 instead of between the inner wall surface of the battery housing 12 and the battery cell 241 on the edge.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un ensemble comprenant un élément conducteur de chaleur à compensation de tolérance (30) comprenant un corps principal conducteur de chaleur (32) qui présente au moins un élément élastique (361, 362, 363, 364, 365) et un composé d'enrobage (40). Le corps principal (32) est positionné dans un espace (28) entre un premier composant (22) et un second composant (12), un premier côté dudit corps principal (32) reposant contre le premier composant (22) et un second côté, opposé au premier côté, étant préchargé par l'élément élastique (361, 362, 363, 364, 365) pour reposer contre le second composant (12), et le corps principal (32) étant presque complètement intégré dans le composé d'enrobage (40).
PCT/EP2021/056071 2021-03-10 2021-03-10 Ensemble présentant un élément conducteur de chaleur à compensation de tolérance, batterie et procédé d'installation de cellules de batterie dans un boîtier de batterie au moyen d'un élément conducteur de chaleur à compensation de tolérance Ceased WO2022188968A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2021/056071 WO2022188968A1 (fr) 2021-03-10 2021-03-10 Ensemble présentant un élément conducteur de chaleur à compensation de tolérance, batterie et procédé d'installation de cellules de batterie dans un boîtier de batterie au moyen d'un élément conducteur de chaleur à compensation de tolérance
DE112021007231.5T DE112021007231A5 (de) 2021-03-10 2021-03-10 Anordnung mit einem toleranzausgleichenden Wärmeleitelement, eine Batterie und ein Verfahren zum Montieren von Batteriezellen in einem Batteriegehäuse mittels eines toleranzausgleichenden Wärmeleitelement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/056071 WO2022188968A1 (fr) 2021-03-10 2021-03-10 Ensemble présentant un élément conducteur de chaleur à compensation de tolérance, batterie et procédé d'installation de cellules de batterie dans un boîtier de batterie au moyen d'un élément conducteur de chaleur à compensation de tolérance

Publications (1)

Publication Number Publication Date
WO2022188968A1 true WO2022188968A1 (fr) 2022-09-15

Family

ID=74874833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/056071 Ceased WO2022188968A1 (fr) 2021-03-10 2021-03-10 Ensemble présentant un élément conducteur de chaleur à compensation de tolérance, batterie et procédé d'installation de cellules de batterie dans un boîtier de batterie au moyen d'un élément conducteur de chaleur à compensation de tolérance

Country Status (2)

Country Link
DE (1) DE112021007231A5 (fr)
WO (1) WO2022188968A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008104356A1 (fr) 2007-02-27 2008-09-04 Daimler Ag Boîtier de batterie
JP2012104284A (ja) * 2010-11-08 2012-05-31 Daikyonishikawa Corp 蓄電装置の収容構造
DE102011103993A1 (de) * 2011-06-10 2012-12-13 Daimler Ag Batterie mit einer Mehrzahl von Batterieeinzelzellen
EP3570364A1 (fr) * 2017-04-06 2019-11-20 LG Chem, Ltd. Bloc-batterie équipé d'un milieu de conduction thermique ayant une forme d'ailette à persienne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008104356A1 (fr) 2007-02-27 2008-09-04 Daimler Ag Boîtier de batterie
JP2012104284A (ja) * 2010-11-08 2012-05-31 Daikyonishikawa Corp 蓄電装置の収容構造
DE102011103993A1 (de) * 2011-06-10 2012-12-13 Daimler Ag Batterie mit einer Mehrzahl von Batterieeinzelzellen
EP3570364A1 (fr) * 2017-04-06 2019-11-20 LG Chem, Ltd. Bloc-batterie équipé d'un milieu de conduction thermique ayant une forme d'ailette à persienne

Also Published As

Publication number Publication date
DE112021007231A5 (de) 2023-12-28

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