WO2022188968A1 - Assembly having a tolerance-compensating heat conducting element, a battery and a method for installing battery cells in a battery housing by means of a tolerance-compensating heat conducting element - Google Patents
Assembly having a tolerance-compensating heat conducting element, a battery and a method for installing battery cells in a battery housing by means of a tolerance-compensating heat conducting element Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims description 11
- 150000001875 compounds Chemical class 0.000 claims abstract description 38
- 230000000284 resting effect Effects 0.000 claims abstract 2
- 238000005266 casting Methods 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000004922 lacquer Substances 0.000 claims description 3
- 238000004382 potting Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 description 15
- 238000001816 cooling Methods 0.000 description 6
- HUWSZNZAROKDRZ-RRLWZMAJSA-N (3r,4r)-3-azaniumyl-5-[[(2s,3r)-1-[(2s)-2,3-dicarboxypyrrolidin-1-yl]-3-methyl-1-oxopentan-2-yl]amino]-5-oxo-4-sulfanylpentane-1-sulfonate Chemical compound OS(=O)(=O)CC[C@@H](N)[C@@H](S)C(=O)N[C@@H]([C@H](C)CC)C(=O)N1CCC(C(O)=O)[C@H]1C(O)=O HUWSZNZAROKDRZ-RRLWZMAJSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000013528 metallic particle Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
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.
Landscapes
- 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
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2021/056071 WO2022188968A1 (en) | 2021-03-10 | 2021-03-10 | Assembly having a tolerance-compensating heat conducting element, a battery and a method for installing battery cells in a battery housing by means of a tolerance-compensating heat conducting element |
DE112021007231.5T DE112021007231A5 (en) | 2021-03-10 | 2021-03-10 | Arrangement with a tolerance-compensating heat-conducting element, a battery and a method for mounting battery cells in a battery housing by means of a tolerance-compensating heat-conducting element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2021/056071 WO2022188968A1 (en) | 2021-03-10 | 2021-03-10 | Assembly having a tolerance-compensating heat conducting element, a battery and a method for installing battery cells in a battery housing by means of a tolerance-compensating heat conducting element |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022188968A1 true WO2022188968A1 (en) | 2022-09-15 |
Family
ID=74874833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/056071 WO2022188968A1 (en) | 2021-03-10 | 2021-03-10 | Assembly having a tolerance-compensating heat conducting element, a battery and a method for installing battery cells in a battery housing by means of a tolerance-compensating heat conducting element |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE112021007231A5 (en) |
WO (1) | WO2022188968A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008104356A1 (en) | 2007-02-27 | 2008-09-04 | Daimler Ag | Battery housing |
JP2012104284A (en) * | 2010-11-08 | 2012-05-31 | Daikyonishikawa Corp | Housing structure of power storage device |
DE102011103993A1 (en) * | 2011-06-10 | 2012-12-13 | Daimler Ag | Cylindrical battery i.e. lithium ion traction battery, for driving e.g. electric car, has film arranged between cells and cooling elements, where film and compensation elements are integrally connected and/or firmly bonded with one another |
EP3570364A1 (en) * | 2017-04-06 | 2019-11-20 | LG Chem, Ltd. | Battery pack equipped with heat conduction medium having a louver fin shape |
-
2021
- 2021-03-10 WO PCT/EP2021/056071 patent/WO2022188968A1/en active Application Filing
- 2021-03-10 DE DE112021007231.5T patent/DE112021007231A5/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008104356A1 (en) | 2007-02-27 | 2008-09-04 | Daimler Ag | Battery housing |
JP2012104284A (en) * | 2010-11-08 | 2012-05-31 | Daikyonishikawa Corp | Housing structure of power storage device |
DE102011103993A1 (en) * | 2011-06-10 | 2012-12-13 | Daimler Ag | Cylindrical battery i.e. lithium ion traction battery, for driving e.g. electric car, has film arranged between cells and cooling elements, where film and compensation elements are integrally connected and/or firmly bonded with one another |
EP3570364A1 (en) * | 2017-04-06 | 2019-11-20 | LG Chem, Ltd. | Battery pack equipped with heat conduction medium having a louver fin shape |
Also Published As
Publication number | Publication date |
---|---|
DE112021007231A5 (en) | 2023-12-28 |
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