CN112829406A - A hollow rubber composite pad for lithium ion battery pack - Google Patents
A hollow rubber composite pad for lithium ion battery pack Download PDFInfo
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- CN112829406A CN112829406A CN202011451097.XA CN202011451097A CN112829406A CN 112829406 A CN112829406 A CN 112829406A CN 202011451097 A CN202011451097 A CN 202011451097A CN 112829406 A CN112829406 A CN 112829406A
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- Prior art keywords
- hollow rubber
- lithium ion
- ion battery
- hollow
- battery pack
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/16—Layered products comprising a layer of natural or synthetic rubber comprising polydienes homopolymers or poly-halodienes homopolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/10—Batteries
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- Battery Mounting, Suspending (AREA)
Abstract
本发明实施例提供了一种锂离子电池组用中空橡胶复合垫，其特征在于，包括：聚酰亚胺膜、中空橡胶板，其中，所述聚酰亚胺膜为两片，分别粘贴在所述中空橡胶板的两侧，形成所述中空橡胶复合垫；所述中空橡胶复合垫置于应用电池组两个相邻单体电池相邻面之间。
The embodiment of the present invention provides a hollow rubber composite pad for a lithium ion battery pack, which is characterized by comprising: a polyimide film and a hollow rubber plate, wherein the polyimide film is two pieces, which are respectively pasted on the The two sides of the hollow rubber plate form the hollow rubber composite pad; the hollow rubber composite pad is placed between the adjacent surfaces of two adjacent single cells of the application battery pack.
Description
Technical Field
A hollow rubber composite pad for a lithium ion battery pack, in particular to a hollow rubber composite pad with stable structure for a square lithium ion battery pack with a metal shell of a lithium ion battery monomer.
Background
The hollow rubber pad has the characteristics of large friction force, compressibility and light weight, and can overcome the deformation of the single battery in the charging and discharging process. However, the single hollow rubber pad also has some disadvantages in practical applications, resulting in limitations in its numerous applications. When the single batteries are assembled, a mutual extrusion pressure F1 is generated between the single batteries, furthermore, the pressure generated by the single batteries on the rubber pad in the middle is F2, and an outward pushing force F3 is formed because the contact surfaces of the single batteries and the rubber pad actually have certain radian. When the battery cell was assembled, the demand of high strength was considered, the coating silicon rubber bonds between general rubber pad and the battery cell, however the silicon rubber was in when the mobile state before the solidification, the coefficient of friction at bonding interface was unusual on the low side, lead to the frictional force slump, outside driving force F3 that the battery cell arc caused is greater than frictional force F, cavity rubber pad takes place deformation under this mechanism, cause the protruding appearance envelope that surpasss the battery cell in cavity rubber pad both sides, lead to follow-up group battery assembly mismatch, cause the quality hidden danger. The invention overcomes the defects of the existing structure, adopts a method of compounding the polyimide film and the rubber pad, solves the problem of volume expansion and deformation of the single battery during charging and discharging, and simultaneously can prevent the deformation of the hollow rubber pad from interfering the subsequent assembly in the assembly process so as to further cause the quality problem.
Disclosure of Invention
The invention aims to provide a hollow rubber composite pad for a lithium ion battery pack, which is characterized by comprising the following components: the composite pad comprises a polyimide film and a hollow rubber plate, wherein the two polyimide films are respectively adhered to two sides of the hollow rubber plate to form the hollow rubber composite pad; the hollow rubber composite pad is arranged between adjacent surfaces of two adjacent single batteries of the application battery pack.
Preferably, the two polyimide films are respectively adhered to two sides of the hollow rubber plate through adhesive sticker, so that the technical effects of combination of structural stability, insulation reinforcement and the like of the hollow rubber plate are achieved.
Preferably, the hollow rubber plate is one of an aviation rubber plate, a silicon rubber plate, a fluororubber plate, nitrile rubber, ethylene propylene diene monomer rubber and the like.
Preferably, the hollow rubber plate comprises a hollow area and a circumferential area, the hollow area achieves the technical effect of accommodating the charge and discharge deformation amount of the single battery, the circumferential area achieves the combined technical effects of arc matching, friction force increasing, rotating torque force increasing and the like, and the technical effect of improving the shock resistance is further achieved.
Preferably, the thickness of the hollow rubber plate is 0.4-2 mm, and the hollow rubber plate is matched with the deformation quantity of charging and discharging, so that the technical effects of optimal combination of deformation quantity, arc matching, shock resistance and the like are achieved.
Preferably, each side length of the hollow area is 0.5-0.8 times of that of the hollow rubber plate, and the technical effect of optimal pressure distribution is achieved.
Preferably, the width of the hollow rubber plate is reduced by 6-2 mm based on the width of the single battery, so that the technical effect of assembly matching after extrusion matching deformation is achieved.
Preferably, the length of the hollow rubber plate is reduced by 4-2 mm based on the width of the single battery, so that the technical effect of assembly matching after extrusion matching deformation is achieved.
Preferably, the thickness of the polyimide film is 0.025 mm-0.1 mm, and the technical effects of the minimum thickness of the polyimide film and the optimal combination of mechanical property and tensile resistance are achieved.
Preferably, the single battery is a square lithium ion battery cell with a metal shell structure.
This patent has the advantage as follows:
(1) the hollow rubber composite pad still keeps a hollow structure, and can overcome the volume change caused by the deformation of the single battery in the charge and discharge process.
(2) The hollow rubber pad in the middle of the hollow rubber composite pad has compressibility, can be better automatically matched and adapted to the arc contact surface of the square lithium ion battery with the metal shell, provides larger friction force and better vibration reduction effect, and improves the shock resistance of the application battery pack.
(3) Two layers of polyimide films are adopted in the hollow position of the hollow rubber composite pad, and the double layers of polyimide films can avoid the defect that a single-layer polyimide film is damaged and not insulated, so that the hollow rubber composite pad has better insulating property.
(4) Two layers of polyimide films are adopted in the hollow position of the hollow rubber composite pad, and the double layers of polyimide films can avoid the defect that a single-layer polyimide film is damaged and not insulated, so that the hollow rubber composite pad has better insulating property.
(5) The polyimide film in the hollow rubber composite pad plays a role in stabilizing the structure of the hollow rubber pad, so that the quality problem in the assembly process can be prevented, and the reliability of the battery pack is ensured.
(6) The hollow rubber composite pad is simple to manufacture, can be popularized and applied in a large quantity, and has great economic benefit.
Drawings
FIG. 1 is a schematic view of a hollow rubber composite pad according to the present invention;
FIG. 2 is a schematic view showing the installation relationship between a lithium ion battery cell and a hollow rubber composite pad according to the present invention;
FIG. 3 is a schematic structural view of a hollow rubber sheet according to the present invention;
fig. 4 is a schematic size diagram of a lithium ion single battery in a battery pack according to the present invention;
FIGS. 5(a) and 5(b) are cross-sectional stress analysis diagrams of single and composite hollow rubber gaskets of the invention under the action of extrusion force, respectively;
fig. 6(a) and fig. 6(b) are graphs comparing the deformation of the single and composite hollow rubber mats under the action of pressing force.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a hollow rubber composite pad for a lithium ion battery pack, which is characterized by comprising the following components in percentage by weight: the composite pad comprises a polyimide film and a hollow rubber plate, wherein the two polyimide films are respectively adhered to two sides of the hollow rubber plate to form the hollow rubber composite pad; the hollow rubber composite pad is arranged between adjacent surfaces of two adjacent single batteries of the application battery pack.
According to one embodiment of the present invention, two pieces of the polyimide film are respectively attached to both sides of the hollow rubber plate by a non-setting adhesive.
According to an embodiment of the present invention, the hollow rubber plate is one of an aircraft rubber plate, a silicone rubber plate, a fluororubber plate, nitrile rubber, ethylene propylene diene monomer rubber, and the like.
According to one embodiment of the present invention, the hollow rubber sheet includes a hollow region and a circumferential region.
According to one embodiment of the present invention, the hollow rubber sheet has a thickness of 0.4mm to 2 mm.
According to one embodiment of the present invention, each side length of the hollow area is 0.5 to 0.8 times of each side length of the hollow rubber sheet.
According to one embodiment of the present invention, the width of the hollow rubber sheet is reduced by 6mm to 2mm based on the width of the unit cell.
According to one embodiment of the present invention, the length of the hollow rubber sheet is reduced by 4mm to 2mm based on the width of the unit cell.
According to one embodiment of the present invention, the polyimide film has a thickness of 0.025mm to 0.1 mm.
According to one embodiment of the invention, the single battery is a square lithium ion battery cell with a metal shell structure.
The following describes the technical aspects of the present invention with specific examples.
As shown in fig. 1, a structurally stable hollow rubber composite mat for a lithium ion battery pack includes a polyimide film layer 11, a hollow rubber sheet 12; one side of each of the two polyimide film layers 11 is coated with adhesive sticker and is adhered to the hollow rubber plate 12.
As shown in fig. 2, the adhered hollow rubber composite layer is placed in a lithium ion battery pack to be assembled, two surfaces of the hollow rubber composite layer are respectively contacted with adjacent surfaces of two adjacent single batteries of the battery pack, and the single batteries are square lithium ion battery monomers with a metal shell structure.
As shown in fig. 3, the hollow rubber plate 2 is one of an aviation rubber plate, a silicone rubber plate, a fluororubber plate, nitrile rubber, ethylene propylene diene monomer rubber, and the like, so as to ensure that the composite layer can be properly deformed to match the plane of the single battery, increase the contact area, and improve the friction force, and meanwhile, the body is an elastic body, so that the internal anti-seismic performance can be improved to a certain extent. The overall dimension is rectangular and is matched with the overall dimension of the single battery, so that the insulating and isolating effects can be achieved. The hollow rubber plate 2 comprises a hollow area 201 and a circumferential area 202, and the thickness is 0.4 mm-2 mm, so as to adapt to the maximum value of the size change of the lithium ion single battery (as shown in fig. 4) in the charging and discharging process. The width a1 of the hollow rubber plate is reduced by 6 mm-2 mm based on the width a3 of the single battery, and the length b1 is reduced by 4 mm-2 mm based on the width b3 of the single battery, so that the effective isolation of the single battery is ensured, and the shape enveloping range of the single battery at two sides or protruding up and down caused by the extrusion deformation of the hollow rubber plate 2 can be prevented. The size a2 of the hollow position of the hollow rubber plate is k1 × a1, b2 is k2 × b1, the value of k1 ranges from 0.5 to 0.75, and the value of k2 ranges from 0.5 to 0.8, so that the hollow rubber gasket is ensured to deform to meet the requirement of matching with the arc-shaped structure of the lithium ion single battery, and meanwhile, irreversible compression deformation caused by the fact that the area of the residual rubber gasket is too small is prevented.
The polyimide film is a polyimide insulating film material, the polyimide material has quite good insulating property, and the two layers of films can effectively prevent the middle positions of adjacent single batteries from being contacted and conducted; the thickness of the polyimide film layer is 0.025 mm-0.1 mm, on one hand, the thickness of the film can be reduced, and further the volume of the battery pack is reduced, and meanwhile, the tensile force formed by the strength of the lowest thickness of the film can ensure that the whole hollow rubber composite pad is not extruded outwards when being extruded.
The hollow rubber pad has the characteristics of large friction force, compressibility and light weight, and can overcome the deformation of the single battery in the charging and discharging process. However, the single hollow rubber pad also has some disadvantages in practical applications, resulting in limitations in its numerous applications. As shown in fig. 5(a) and 5(b), when the single batteries are assembled, a mutual pressing pressure F1 is generated between the single batteries, and further, the pressure generated by the single batteries on the rubber pad in the middle is F2, and since the contact surface between the single batteries and the rubber pad is actually provided with a certain radian, an outward pushing force F3 is generated. When the single battery is assembled, considering the requirement of high strength, the rubber gasket and the single battery are generally coated with silicon rubber for bonding, however, when the silicon rubber is in a flowing state before curing, the friction coefficient of a bonding interface is abnormally low, so that the friction force is suddenly reduced, an outward driving force F3 caused by the arc shape of the single battery is greater than the friction force F, and the hollow rubber gasket is deformed under the mechanism, so that the two sides of the hollow rubber gasket protrude out of the shape envelope of the single battery (as shown in fig. 6 (a)), so that the subsequent assembly of a battery pack is not matched, and the quality hidden trouble is caused.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011451097.XA CN112829406A (en) | 2020-12-10 | 2020-12-10 | A hollow rubber composite pad for lithium ion battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011451097.XA CN112829406A (en) | 2020-12-10 | 2020-12-10 | A hollow rubber composite pad for lithium ion battery pack |
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| Publication Number | Publication Date |
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| CN112829406A true CN112829406A (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011451097.XA Pending CN112829406A (en) | 2020-12-10 | 2020-12-10 | A hollow rubber composite pad for lithium ion battery pack |
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| CN104795606A (en) * | 2014-01-21 | 2015-07-22 | 微宏动力系统（湖州）有限公司 | Liquid-cooled battery pack system |
| CN208507758U (en) * | 2018-06-06 | 2019-02-15 | 中航锂电（洛阳）有限公司 | Battery modules and its cushion |
| CN109860455A (en) * | 2018-12-17 | 2019-06-07 | 北京卡达克数据有限公司 | A kind of power battery safety device |
| CN110061158A (en) * | 2019-04-12 | 2019-07-26 | 力神动力电池系统有限公司 | A kind of power battery sealing buffering heat insulating mattress |
| CN110474130A (en) * | 2019-07-29 | 2019-11-19 | 上海空间电源研究所 | A kind of Upper Stage Li-ion batteries piles |
| CN110890564A (en) * | 2019-11-29 | 2020-03-17 | 贵州梅岭电源有限公司 | Preparation method of co-heating multi-monomer for thermal battery |
| CN212113816U (en) * | 2020-05-27 | 2020-12-08 | 欣旺达电动汽车电池有限公司 | Battery module |
-
2020
- 2020-12-10 CN CN202011451097.XA patent/CN112829406A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202632592U (en) * | 2012-03-11 | 2012-12-26 | 陈锦华 | Test teaching aid of proton exchange membrane oxyhydrogen fuel cell |
| CN104577184A (en) * | 2013-10-25 | 2015-04-29 | 北京好风光储能技术有限公司 | High-voltage power battery |
| CN104795606A (en) * | 2014-01-21 | 2015-07-22 | 微宏动力系统（湖州）有限公司 | Liquid-cooled battery pack system |
| CN104319362A (en) * | 2014-11-19 | 2015-01-28 | 上海航天电源技术有限责任公司 | Vehicle lithium ion battery integration module and integration method thereof |
| CN208507758U (en) * | 2018-06-06 | 2019-02-15 | 中航锂电（洛阳）有限公司 | Battery modules and its cushion |
| CN109860455A (en) * | 2018-12-17 | 2019-06-07 | 北京卡达克数据有限公司 | A kind of power battery safety device |
| CN110061158A (en) * | 2019-04-12 | 2019-07-26 | 力神动力电池系统有限公司 | A kind of power battery sealing buffering heat insulating mattress |
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| CN110890564A (en) * | 2019-11-29 | 2020-03-17 | 贵州梅岭电源有限公司 | Preparation method of co-heating multi-monomer for thermal battery |
| CN212113816U (en) * | 2020-05-27 | 2020-12-08 | 欣旺达电动汽车电池有限公司 | Battery module |
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Application publication date: 20210525 |