CN110112341B - Thermal expansion material for battery module and battery module - Google Patents
Thermal expansion material for battery module and battery module Download PDFInfo
- Publication number
- CN110112341B CN110112341B CN201910317809.XA CN201910317809A CN110112341B CN 110112341 B CN110112341 B CN 110112341B CN 201910317809 A CN201910317809 A CN 201910317809A CN 110112341 B CN110112341 B CN 110112341B
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- main
- battery
- battery cell
- battery module
- sheet
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- 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
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- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
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- 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
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
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- 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
Abstract
The invention discloses a thermal expansion material for a battery module and the battery module, wherein the battery module comprises an upper support, a lower support, battery cores, a main bus sheet and an auxiliary bus sheet, the main bus sheet is arranged on the lower surface of the lower support, each battery core fixing hole of the lower support is positioned beside the main bus sheet, a plurality of accommodating grooves are arranged on the lower surface of the lower support, the accommodating grooves correspond to the battery core fixing holes one by one, the accommodating grooves are positioned between the battery core fixing holes and the main bus sheet, each battery core is connected with the main bus sheet through the auxiliary bus sheet, each auxiliary bus sheet is positioned at the opening of the accommodating groove, and the accommodating grooves are filled with the thermal expansion material. The invention ensures that the battery core in the battery module can be automatically disconnected when the temperature is abnormal, is particularly suitable for the lithium battery module, solves the potential safety hazard of the battery module in a high-temperature environment, and improves the use safety of products.
Description
Technical Field
The invention relates to a thermal expansion material for a battery module and the battery module, and belongs to the field of lithium battery safety and energy storage.
Background
In the prior art, a lithium battery module mainly comprises an upper support, a lower support, battery cells and a bus bar, wherein each battery cell is fixedly connected between the upper support and the lower support, the bus bar covers the outer surfaces of the upper support and the lower support, and the positive electrode and the negative electrode of each battery cell are connected with the bus bar in a welded mode through welding wires. By adopting the battery module with the structure, if a certain electric core in the battery module is abnormal, the welding wire can be fused when the output current is abnormal, so that the abnormal electric core is disconnected with the circuit, and the safety of the battery module is ensured. However, the temperature of the battery cell and the ambient temperature of the battery cell also have corresponding requirements, when the battery cell is overheated, it is indicated that the battery cell is in an abnormal state, when the battery module is wholly at a very high temperature, a potential safety hazard also exists, and at this time, the battery cell is also required to be disconnected.
Disclosure of Invention
The present invention is directed to solve the above problems in the prior art, and therefore, to provide a thermal expansion material for a battery module and a battery module, which can automatically disconnect a circuit when the temperature of a battery cell itself is too high or in an environment of too high temperature.
The technical solution of the invention is as follows: a thermal expansion material for a battery module comprises 71-76 wt% of methyl phenyl silicone resin (solid content is 60%), 16-24 wt% of promoter dibutyl tin dilaurate, 0.5-1.5 wt% of cross-linking agent ethyl orthosilicate, 1-5 wt% of mica powder, 1-3 wt% of white carbon black and 0.2-0.8 wt% of expansion microspheres.
The invention also discloses a battery module, which comprises an upper bracket, a lower bracket, battery cells, a main bus sheet and an auxiliary bus sheet, wherein the upper bracket and the lower bracket are both provided with battery cell fixing holes, the upper end and the lower end of each battery cell are respectively and fixedly connected in the battery cell fixing holes of the upper bracket and the lower bracket, the lower surface of the lower bracket and/or the upper surface of the upper bracket are provided with the main bus sheet, each battery cell fixing hole of the lower bracket and/or the upper bracket is positioned at the side of the main bus sheet, the lower surface of the lower bracket and/or the upper surface of the upper bracket are provided with a plurality of holding tanks, each holding tank is in one-to-one correspondence with each battery cell fixing hole of the bracket, and the holding tanks are positioned between each battery cell fixing hole and the main bus sheet, each battery cell is connected with the main bus sheet through the auxiliary bus sheet, and each auxiliary bus sheet is positioned at the opening of the holding tanks, and the accommodating groove is filled with the thermal expansion material for the battery module.
Further, the above battery module, wherein: the support is provided with a main confluence piece fixing groove, and viscose is filled in the main confluence piece fixing groove, so that the main confluence piece is stuck in the main confluence piece fixing groove.
Still further, the above battery module, wherein: the battery cell fixing holes are formed in two rows and are respectively located on two sides of the main bus sheet.
Still further, the above battery module, wherein: the battery cell fixing holes are formed in four rows, two rows of battery cells are located on two sides of the first main bus piece, the rest two rows of battery cells are located on two sides of the second main bus piece, and the first main bus piece is connected with the second main bus piece.
The outstanding technical effects of the invention are mainly reflected in that: the invention ensures that the battery core in the battery module can be automatically disconnected when the temperature is abnormal, is particularly suitable for the lithium battery module, solves the potential safety hazard of the battery module in a high-temperature environment, and improves the use safety of products.
Drawings
Fig. 1 is a schematic diagram of the connection between the upper and lower brackets and the battery cell according to the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a top view of another embodiment of the present invention.
The individual reference symbols in the figures mean: 1-bracket, 11-cell fixing hole, 12-holding groove, 13-main confluence plate fixing groove, 2-cell, 3-main confluence plate and 4-auxiliary confluence plate.
Detailed Description
The present invention will be described in further detail below with reference to the following detailed description of the preferred embodiments.
As shown in fig. 1 and fig. 2, the battery module of the invention includes an upper bracket 1, a lower bracket 1, a battery core 2, a main bus bar 3 and an auxiliary bus bar 4, wherein the upper bracket 1 and the lower bracket 1 are respectively provided with a battery core fixing hole 11, the upper end and the lower end of the battery core 2 are respectively fixedly connected to the battery core fixing holes 11 of the upper bracket and the lower bracket, the upper surface of the upper bracket 1 and the lower surface of the lower bracket 1 are respectively provided with the main bus bar 3, each battery core fixing hole 11 is formed with a plurality of rows, each row of battery core fixing holes 11 is located beside the main bus bar, the upper surface of the upper bracket and the lower surface of the lower bracket are respectively provided with a plurality of accommodating grooves 12, the accommodating grooves 12 are in one-to-one correspondence with each battery core fixing hole 11, the accommodating grooves 12 are located between each battery core fixing hole 11 and the main bus bar 3, each battery core 2 is connected to the main bus bar 3 through the auxiliary bus bar 4, and each auxiliary bus bar 4 is located at the opening of the accommodating groove 12, the accommodating groove 12 is filled with a thermally expansive material. When the electric core 2 is overheated, the heated expansion material foams and expands, so that a thrust is formed on the upper auxiliary bus bar 4, and the auxiliary bus bar 4 is disconnected. The primary current collector sheet is preferably an aluminum sheet.
It should be noted here that it is only preferable to provide the receiving groove 12 in both the upper and lower frames and fill the receiving groove 12 with the thermal expansion material. Only one of the lower support 1 and the upper support 1 is provided with the accommodating groove 12, and the accommodating groove 12 is filled with a thermal expansion material, so that when the battery cell 2 is overheated or the whole battery module is in an overheated environment, the sub bus bar 4 on the lower support 1 on the side of the negative electrode end of the battery cell 2 is disconnected or the sub bus bar 4 on the upper support 1 on the side of the positive electrode end of the battery cell 2 is disconnected, that is, the battery cell 2 stops supplying power.
In order to ensure that the thermal expansion material has sufficient sensitivity, the distance between the accommodating groove 12 and the corresponding battery cell 2 may not be too large, and the distance between the battery cell fixing hole 11 and the accommodating groove 12 is preferably less than 2 mm. The secondary bus bar 4 is preferably an aluminum sheet.
Generally, the preset temperature of the battery core is 80 ℃, so that the expansion degree of the thermal expansion material can be limited to disconnect the secondary bus bar 4 when the thermal expansion material exceeds the preset temperature, and therefore, strict requirements are imposed on the expansion coefficient of the thermal expansion material and the sensitivity to temperature change. Based on the above, the invention also discloses a thermal expansion material specially used for a battery module, which comprises 71-76 wt% of methyl phenyl silicone resin (with a solid content of 60%), 16-24 wt% of promoter dibutyl tin dilaurate, 0.5-1.5 wt% of cross-linking agent ethyl orthosilicate, 1-5 wt% of mica powder, 1-3 wt% of white carbon black and 0.2-0.8 wt% of expansion microspheres.
The specific formula is preferably 73.5 wt% of methyl phenyl silicone resin (solid content is 60%), 20 wt% of promoter dibutyl tin dilaurate, 1 wt% of cross-linking agent ethyl orthosilicate, 3 wt% of mica powder, 2 wt% of white carbon black and 0.5 wt% of expanded microspheres.
Example 1
As shown in fig. 1 and 2, a main bus bar fixing groove 13 is formed at a middle position of the upper and lower support frames 1, and the main bus bar 3 is fixedly connected to the main bus bar fixing groove 13, and specifically, the main bus bar fixing groove 13 may be filled with adhesive, so that the main bus bar 3 is adhered to the main bus bar fixing groove 13. Each battery cell fixing hole 11 is divided into two rows, and the two rows are respectively located on two sides of the main bus bar 3. The main bus bar 3 is connected with the electric core 2 in each electric core fixing hole 11 through the auxiliary bus bar 4 in a welding manner, the auxiliary bus bar 4 is arranged at the opening of each accommodating groove 12, and the accommodating grooves 12 are filled with thermal expansion materials.
Example 2
The difference between the present embodiment and embodiment 1 is that in the present embodiment, two main bus bars 3 are respectively disposed on the upper bracket 1 and the lower bracket 1, and each main bus bar includes a first main bus bar and a second main bus bar, the cell fixing holes 11 on the bracket 1 are divided into four rows, two rows are located on two sides of the first main bus bar 3, the other two rows are located on two sides of the second main bus bar, the first main bus bar is connected with the second main bus bar, and the material of the connected portion is the same as the material of the main bus bar 3, and is preferably an aluminum sheet. Two main bus bars 3 and electric core 2 in each electric core fixed orifices 11 of side pass through vice bus bar 4 welded connection, and vice bus bar 4 is in the opening part of each holding tank 12, are filled with thermal energy material in the holding tank 12. It should be noted that, the two embodiments are only preferred, and more main bus bars may be arranged according to actual needs, and specific connection manners of the battery core and the main bus bar may refer to the embodiments, and are not described herein again.
As can be seen from the above description, when a certain electric core 2 in the battery module according to the present invention is abnormally overheated, the thermal expansion material in the side accommodating groove 12 expands and foams, so as to break the secondary bus bar 4 connecting the electric core 2 and the main bus bar 3, thereby disconnecting the electric core 2 and stopping power supply. When the whole battery module is in an excessively high temperature environment, the auxiliary bus bar 4 between the battery cells 2 and the main bus bar 3 is broken by the thermal expansion material, and all the battery cells 2 stop supplying power. Has good protection effect.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (3)
1. A battery module, characterized in that: the battery cell fixing device comprises an upper support, a lower support, battery cells, a main confluence sheet and an auxiliary confluence sheet, wherein the upper support and the lower support are respectively provided with a battery cell fixing hole, the upper end and the lower end of each battery cell are respectively and fixedly connected in the battery cell fixing holes of the upper support and the lower support, the lower surface of the lower support and the upper surface of the upper support are provided with the main confluence sheet, the upper support and the lower support are provided with a main confluence sheet fixing groove, the main confluence sheet fixing groove is filled with viscose glue, so that the main confluence sheet is stuck in the main confluence sheet fixing groove, each battery cell fixing hole of the lower support and each battery cell fixing hole of the upper support are positioned beside the main confluence sheet, the lower surface of the lower support and the upper surface of the upper support are provided with a plurality of accommodating grooves, each accommodating groove corresponds to each battery cell fixing hole of the support one by one, the accommodating grooves are positioned between each battery cell fixing hole and the main confluence sheet, and are connected with the main confluence sheet through the auxiliary confluence sheet, and each auxiliary bus sheet is positioned at an opening of the accommodating groove, and the accommodating groove is filled with a heated expansion material, wherein the heated expansion material comprises 71-76 wt% of methyl phenyl silicone resin, 16-24 wt% of promoter dibutyl tin dilaurate, 0.5-1.5 wt% of cross-linking agent ethyl orthosilicate, 1-5 wt% of mica powder, 1-3 wt% of white carbon black and 0.2-0.8 wt% of expansion microspheres, and the solid content of the methyl phenyl silicone resin is 60%.
2. The battery module of claim 1, wherein: the battery cell fixing holes are formed in two rows and are respectively located on two sides of the main bus sheet.
3. The battery module of claim 1, wherein: the battery cell fixing holes are formed in four rows, two rows of battery cells are located on two sides of the first main bus piece, the rest two rows of battery cells are located on two sides of the second main bus piece, and the first main bus piece is connected with the second main bus piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317809.XA CN110112341B (en) | 2019-04-19 | 2019-04-19 | Thermal expansion material for battery module and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317809.XA CN110112341B (en) | 2019-04-19 | 2019-04-19 | Thermal expansion material for battery module and battery module |
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| Publication Number | Publication Date |
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| CN110112341A CN110112341A (en) | 2019-08-09 |
| CN110112341B true CN110112341B (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910317809.XA Active CN110112341B (en) | 2019-04-19 | 2019-04-19 | Thermal expansion material for battery module and battery module |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113692674B (en) * | 2021-03-23 | 2023-05-02 | 东莞新能安科技有限公司 | Battery module and electronic device comprising same |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101659823A (en) * | 2009-09-27 | 2010-03-03 | 中国科学技术大学 | Expanded type fireproof coating and preparation method thereof |
| CN101675096A (en) * | 2007-05-01 | 2010-03-17 | 陶氏康宁公司 | Nanomaterial-filled silicone composition and reinforced silicone resin film |
| CN101977975A (en) * | 2008-03-24 | 2011-02-16 | 诺信公司 | Apparatus and methods for producing foamed materials |
| CN105778505A (en) * | 2014-12-25 | 2016-07-20 | 广东生益科技股份有限公司 | Organic silicon resin composition and white prepreg and white laminated board adopting same |
| CN106047159A (en) * | 2016-07-15 | 2016-10-26 | 西安天元化工有限责任公司 | High-temperature-resistant material based on organic silicon resin |
| CN205790159U (en) * | 2016-05-25 | 2016-12-07 | 深圳市鑫升新能源有限公司 | A kind of anti-short circuit lithium battery pole ear |
| CN106953059A (en) * | 2015-10-06 | 2017-07-14 | 三星Sdi株式会社 | Busbar |
| CN208078037U (en) * | 2018-01-30 | 2018-11-09 | 肖立峰 | Battery modules |
| CN109565024A (en) * | 2016-11-22 | 2019-04-02 | 松下知识产权经营株式会社 | Battery module |
-
2019
- 2019-04-19 CN CN201910317809.XA patent/CN110112341B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101675096A (en) * | 2007-05-01 | 2010-03-17 | 陶氏康宁公司 | Nanomaterial-filled silicone composition and reinforced silicone resin film |
| CN101977975A (en) * | 2008-03-24 | 2011-02-16 | 诺信公司 | Apparatus and methods for producing foamed materials |
| CN101659823A (en) * | 2009-09-27 | 2010-03-03 | 中国科学技术大学 | Expanded type fireproof coating and preparation method thereof |
| CN105778505A (en) * | 2014-12-25 | 2016-07-20 | 广东生益科技股份有限公司 | Organic silicon resin composition and white prepreg and white laminated board adopting same |
| CN106953059A (en) * | 2015-10-06 | 2017-07-14 | 三星Sdi株式会社 | Busbar |
| CN205790159U (en) * | 2016-05-25 | 2016-12-07 | 深圳市鑫升新能源有限公司 | A kind of anti-short circuit lithium battery pole ear |
| CN106047159A (en) * | 2016-07-15 | 2016-10-26 | 西安天元化工有限责任公司 | High-temperature-resistant material based on organic silicon resin |
| CN109565024A (en) * | 2016-11-22 | 2019-04-02 | 松下知识产权经营株式会社 | Battery module |
| CN208078037U (en) * | 2018-01-30 | 2018-11-09 | 肖立峰 | Battery modules |
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| CN110112341A (en) | 2019-08-09 |
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