CN211980741U - Fusing structure for battery module and battery module - Google Patents
Fusing structure for battery module and battery module Download PDFInfo
- Publication number
- CN211980741U CN211980741U CN202020848345.3U CN202020848345U CN211980741U CN 211980741 U CN211980741 U CN 211980741U CN 202020848345 U CN202020848345 U CN 202020848345U CN 211980741 U CN211980741 U CN 211980741U
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- fusing
- battery module
- copper bar
- utmost point
- output electrode
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 93
- 229910052802 copper Inorganic materials 0.000 claims abstract description 92
- 239000010949 copper Substances 0.000 claims abstract description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000000178 monomer Substances 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
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Abstract
The utility model discloses a battery module is with fusing structure and battery module relates to battery safety technical field. This battery is fusing structure for module includes: the battery module body is provided with a general lug; fuse formula output utmost point copper bar, fuse formula output utmost point copper bar all set up with total utmost point ear one-to-one, all are provided with the water conservancy diversion portion on the fuse formula output utmost point copper bar, and the water conservancy diversion portion is connected with total utmost point ear electricity, still is provided with the fusing portion in the water conservancy diversion portion, and the fusing portion is with total utmost point ear and predetermines the distance setting. Can carry out short-circuit protection when the short circuit takes place at the battery module level through this fusing structure for battery module, and can avoid the leading-in electric core pole piece of a large amount of heats that fusing structure produced when high magnification charges and discharges, the security is high.
Description
Technical Field
The utility model relates to a battery safety technical field especially relates to a battery module is with fusing structure and battery module.
Background
With the continuous development of battery technology, the safety of a battery Pack (Pack) during short circuit is more and more valued by end users. For the battery Pack, in addition to the short-circuit protection at the Pack level, the short-circuit protection design at the module level is also considered. There are also relevant requirements for short-circuit protection at the module level in GB/T31485. Specifically, the short circuit at the battery module level includes a high-voltage connection external short circuit of the battery module, that is, all the cells of the battery module are in a short circuit loop. According to the test data of the equipment during short circuit, the short-circuit current under the working condition can reach 4000A-9000A. In the short time, electric core in the battery module will produce a large amount of heats, if do not do the short-circuit protection design to it, can very easily cause thermal runaway.
Currently, in view of the above situation, a technician may design a punching hole at a cell tab to form a fusing part. When the battery module short circuit, flow the sectional area and diminish after punching a hole because of utmost point ear, the excessive flow increases in the twinkling of an eye, can make the portion of fusing generate heat sharply increase and fuse fast to avoid appearing because of electric core continuously overflows the condition that causes the weeping to catch fire. However, above-mentioned scheme can only be limited to the charge-discharge of low-rate, in case need the battery module to carry out high-rate charge-discharge and when not reaching the biggest charge-discharge that surpasses electric core again simultaneously, the continuous high-rate charge-discharge will lead to utmost point ear temperature rise too high, and the heat on the utmost point ear can be followed the utmost point ear and is led into in electric core pole piece. If the pole piece in the battery core is continuously under the over-temperature condition, the electrolyte is dried to form a hot spot, and finally thermal runaway is caused, so that the safety is low.
Accordingly, a fusing structure for a battery module and a battery module are needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fusing structure and battery module for battery module can be on the basis of carrying out short-circuit protection to the battery module level, avoids fusing structure's heat to lead into electric core pole piece when the battery module carries out high multiplying power charge-discharge, avoids appearing the situation that causes thermal runaway because of electric core pole piece excess temperature promptly, and the security is high.
To achieve the purpose, the utility model adopts the following technical proposal:
a fusing structure for a battery module, comprising:
a battery module body having a general tab;
fuse formula output utmost point copper bar, fuse formula output utmost point copper bar all with total utmost point ear one-to-one sets up, all be provided with water conservancy diversion portion on the fuse formula output utmost point copper bar, water conservancy diversion portion with total utmost point ear electricity is connected, still be provided with fusing portion in the water conservancy diversion portion, just fusing portion with total utmost point ear is and presets the distance setting.
Optionally, the total tab includes a total positive tab and a total negative tab.
Optionally, the preset distance is not less than 29.5 mm.
Optionally, the predetermined cross-sectional area of the fusing part is smaller than the predetermined cross-sectional area of the flow guide part.
Optionally, an opening is arranged in the middle of the flow guide part to form the fusing part.
Optionally, the melting point of the fusing part is lower than the melting point of the flow guiding part.
Optionally, the diversion part is a copper part, and the fusing part is an aluminum part.
Optionally, an insulating support is arranged between the end of the battery module body and the fused output electrode copper bar, and the fused output electrode copper bar is connected with the insulating support.
Optionally, the fuse-type output electrode copper bar and the end face of the insulating support are arranged at intervals to form a heat dissipation space.
The utility model also provides a battery module, include as above the battery module with fusing structure.
The utility model has the advantages that:
the utility model provides a battery module is with fusing structure and battery module. Through the department that converges of electric current sets up the fuse-type output pole copper bar of being connected with total utmost point ear electricity in the battery module, can make the timely fusing of fuse-type output pole copper in the row when the short circuit takes place for the battery module level to avoid electric core in the battery module to last overflowing, play the short-circuit protection effect, need not trompil again on electric core utmost point ear. Simultaneously, total utmost point ear of fusing portion through making fusing formula output pole copper bar is and predetermines the distance setting, can make the heat that fusing portion produced this predetermine the increase of distance within range along with the transmission distance and attenuate fast when high multiplying power charge-discharge to guarantee only to have few heat and lead in to electric core pole piece along electric core utmost point ear, can effectively avoid making electric core pole piece be in the excess temperature state and cause thermal runaway, the security is high.
Drawings
Fig. 1 is a schematic view of an overall structure of a fusing structure for a battery module according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a first output electrode copper bar in a fuse structure for a battery module according to a first embodiment of the present invention;
fig. 3 is a schematic structural view of a second output electrode copper bar in the fusing structure for a battery module according to an embodiment of the present invention;
fig. 4 is a schematic structural view of an insulating support in a fuse structure for a battery module according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a second output electrode copper bar in the fusing structure for the battery module according to the embodiment of the present invention.
In the figure:
1. a battery module body; 11. a total positive electrode tab; 12. a total negative electrode tab; 2. a first output electrode copper bar; 21. a first flow guide part; 22. a first bar-shaped hole; 23. a first rivet post hole; 3. a second output electrode copper bar; 31. a second flow guide part; 32. a second output electrode copper bar fusing part; 33. a second bar-shaped hole; 34. a second rivet post hole; 4. an insulating support; 41. a boss; 42. and (6) riveting the columns.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
The embodiment provides a fusing structure for a battery module. The fusing structure for the battery module comprises a battery module body 1 and a fusing type output electrode copper bar. The battery module body 1 has a general tab. The fusing type output electrode copper bars are all arranged in one-to-one correspondence with the general tabs. And the fusing type output electrode copper bars are provided with flow guide parts which are electrically connected with the general lug. The flow guide portion is further provided with a fusing portion, and the fusing portion and the general lug are arranged at a preset distance. It is understood that the battery module body 1 may have a plurality of general tabs therein. Correspondingly, at least one fusing type output pole copper bar can be arranged to be connected with the general pole lug.
When the short circuit of battery module level takes place, because fuse-type output utmost point copper bar is located the electric current and converges the department, so fuse-out portion that sets up on fuse-type output utmost point copper bar can fuse in time to avoid the electric core in the battery module to continuously overflow, play the short circuit protection effect. Of course, after the arrangement, the battery module does not need to be additionally provided with holes on the battery core lugs. Simultaneously, because fusing part and total utmost point ear on the formula of fusing output utmost point copper bar are preset apart from the setting, so when high multiplying power charge-discharge and current value did not exceed the maximum charge-discharge current of electric core, can make the heat that fusing part produced decay fast along with the increase of transfer distance in this preset distance scope to guarantee only to have few heat along electric core utmost point ear conduct electric core pole piece in, can avoid making electric core pole piece be in the excess temperature state and cause thermal runaway, the security is high.
Optionally, the total tab connected with the fused output electrode copper bar can be a total positive tab 11 or a total negative tab 12, and the specific setting can be adjusted according to actual requirements.
Optionally, on the fused output electrode copper bar, the preset cross-sectional area of the fusing part is smaller than the preset cross-sectional area of the flow guide part. Specifically, an opening may be provided in the middle of the flow guide to form the fusing part. It will be appreciated that the shape and size of the opening for forming the fuse portion can be set according to actual needs.
In this embodiment, as shown in fig. 1 to fig. 3, a fuse-type output electrode copper bar, i.e., a second output electrode copper bar 3, is provided to be connected to the total negative electrode tab 12. The second flow guiding portion 31 is arranged on the second output electrode copper bar 3, and a rectangular hole is arranged in the middle of the second flow guiding portion 31 to form a fusing portion, namely a fusing portion 32 of the second output electrode copper bar. The second output electrode copper bar fusing part 32 is arranged at a preset distance from the total negative electrode tab 12. Meanwhile, in the embodiment, a first output electrode copper bar 2 connected to the general positive electrode tab 11 is further provided, and the structure of the first output electrode copper bar is similar to that of the second output electrode copper bar 3, but the first output electrode copper bar 2 is a non-fusing output electrode copper bar: the first output electrode copper bar 2 is provided with only the first flow guiding part 21 electrically connected with the general positive electrode tab 11, and is not provided with the fusing part.
Specifically, the length and width of the rectangular hole formed in the second flow guide portion 31 are 7.35mm × 2.5 mm. The predetermined cross-sectional area of the second output electrode copper bar fusing part 32 is 16.2mm2And the preset cross-sectional area of the second flow guide part 31 adjacent to the second output electrode copper bar fusing part 32 is 34.6mm2. The preset distance between the second output electrode copper bar fusing part 32 and the total negative electrode tab 12 is not less than 29.5mm, so that the heat can be fully attenuated. Of course, in other embodiments, the first output electrode copper bar 2 may also be arranged as a fuse-type output electrode copper bar.
Optionally, as shown in fig. 1 and fig. 2, a first strip-shaped hole 22 may be provided on the first output electrode copper bar 2 for the positive electrode tab monomer in the total positive electrode tab 11 to pass through, so that the positive electrode tab monomer is bent and then attached to the first flow guiding portion 21 of the first output electrode copper bar 2, and the stability of circuit connection is ensured. Similarly, as shown in fig. 1 and fig. 3, a second strip-shaped hole 33 may also be provided on the second output electrode copper bar 3 for the single negative electrode tab in the total negative electrode tab 12 to pass through, so that the single negative electrode tab is bent and then attached to the second flow guiding portion 31 of the second output electrode copper bar 3. Specifically, 1-2 layers of positive electrode lug monomers or negative electrode lug monomers are attached to each output electrode copper bar.
Optionally, the first output electrode copper bar 2 is welded to the total positive electrode tab 11, and the second output electrode copper bar 3 is welded to the total negative electrode tab 12, so as to ensure firm connection. Further, as shown in fig. 1, the two output electrode copper bars are welded to the total positive electrode tab 11 or the total negative electrode tab 12 by a wave-shaped welding bead.
Optionally, for the convenience of installation, an insulating support 4 is arranged between the end of the battery module body 1 and the fused output electrode copper bar, and the fused output electrode copper bar is connected with the insulating support 4. In this embodiment, as shown in fig. 1, the first output electrode copper bar 2 and the second output electrode copper bar 3 are located at the same end of the battery module body 1, the insulating support 4 is disposed between the end of the battery module body 1 and the two output electrode copper bars, and the two output electrode copper bars are both fixedly connected to the insulating support 4. Alternatively, the insulating support 4 may be a plastic support, as far as the specific type is concerned.
Furthermore, the fused output electrode copper bar and the end face of the insulating support 4 can be arranged at intervals to form a heat dissipation space for heat dissipation of the fused output electrode copper bar, namely the first output electrode copper bar 2. At this moment, because second output pole copper bar fusing part 32 is arranged on second output pole copper bar 3, the existence of second heat dissipation space is more favorable to the heat dissipation of second output pole copper bar fusing part 32, further reduces its heat to the transmission of electric core pole piece. In this embodiment, the end surfaces of the first output electrode copper bar 2 and the insulating support 4 are also arranged at intervals, so that the first output electrode copper bar 2 can dissipate heat. In addition, it can be understood that, because the insulating support 4 is made of plastic, the aging of the insulating support 4 can be greatly slowed down according to the arrangement.
Specifically, taking the connection of the insulating support 4 and the first output electrode copper bar 2 as an example, as shown in fig. 1, 2 and 4, a plurality of bosses 41 are provided on the insulating support 4, and the flow guide portions 21 in the first output electrode copper bar 2 can abut on end surfaces of the bosses 41. The arrangement of the boss 41 realizes the arrangement of the interval between the end face of the insulating support 4 and the first output electrode copper bar 2, so that a heat dissipation space can be formed. In this embodiment, the height of each boss 41 is 1 mm. In addition, similar to the arrangement of the first strip-shaped hole 22 in the first output electrode copper bar 2, a plurality of strip-shaped holes are also arranged on the insulating support 4 for the core tabs to pass through.
Further, a plurality of riveting columns 42 are further arranged on the insulating support 4, and a plurality of first riveting column holes 23 are correspondingly arranged on the first output pole copper bar 2. After the riveting column 42 passes through the first rivet hole 23, an operator can melt the protruding part of the riveting column 42 in a hot-melting riveting manner to form a riveting head, so that riveting between the first output electrode copper bar 2 and the insulating support 4 is realized.
Similarly, as shown in fig. 3, a second rivet hole 34 corresponding to the rivet column 42 is also formed in the second output electrode copper bar 3, and when the rivet column 42 passes through the second rivet hole 34, an operator can rivet the second output electrode copper bar 3 and the insulating support 4 by using a hot-melt riveting method. Of course, in other embodiments, the two output electrode copper bars and the insulating support 4 may be fixedly connected in other manners according to actual situations.
This embodiment still provides a battery module, and it includes as above the fusing structure for the battery module, through setting up the fusing formula output pole copper bar of being connected with total utmost point ear electricity, can make fusing portion on the fusing formula output pole copper bar in time fuse when the short circuit takes place for the battery module level to electric core in avoiding the battery module lasts and overflows, plays short circuit protection. Simultaneously, because the fusing part still is to predetermineeing the distance setting with total utmost point ear, so can make the heat that the fusing part produced in this predetermine the distance within range and attenuate along with the increase of transmission distance fast when high multiplying power charge-discharge to guarantee only to have few heat and lead-in to electric core pole piece along electric core utmost point ear in, avoid making electric core pole piece be in the excess temperature state and cause thermal runaway, the security is high. Further, this battery module still includes the casing, and the battery module sets up in the casing with fusing structure.
Example two
The embodiment provides a fusing structure for a battery module and the battery module. This fusing structure for battery module is roughly the same with the fusing structure for battery module that embodiment one provided, and the difference only lies in: the melting point of the fusing part is lower than that of the flow guide part.
Specifically, the flow guide portion and the fusing portion may be provided as a copper portion and an aluminum portion, respectively. Still taking the second output electrode copper bar 3 as a fuse-type output electrode copper bar as an example, as shown in fig. 5, the second guiding portion 31 and the second output electrode copper bar fusing portion 32 can be respectively configured as a copper portion and an aluminum portion. At this time, since the melting point of the copper portion is about 1083 ℃ and the melting point of the aluminum portion is about 660 ℃, the melting point of the second output electrode copper bar fusing portion 32 is lower than the melting point of the second current guiding portion 31, so that the second output electrode copper bar fusing portion 32 is fused when short circuit occurs in the battery module level, and the function of protecting the circuit is achieved. Of course, the aluminum part is also far away from the total positive electrode tab 11 and the total negative electrode tab 12, so as to avoid thermal runaway caused by a large amount of heat generated by the aluminum part during high-rate charge and discharge introduced into the cell pole piece along the cell pole tab.
In addition, it can be understood that, since aluminum has a smaller conductivity than copper, as shown in fig. 5, no opening is formed on the aluminum portion in this embodiment, so as to ensure that the entire structure has good conductivity under the non-short-circuit condition.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides a battery is fusing structure for module which characterized in that includes:
a battery module body (1), the battery module body (1) having a general tab;
fuse formula output utmost point copper bar, fuse formula output utmost point copper bar all with total utmost point ear one-to-one sets up, all be provided with water conservancy diversion portion on the fuse formula output utmost point copper bar, water conservancy diversion portion with total utmost point ear electricity is connected, still be provided with fusing portion in the water conservancy diversion portion, just fusing portion with total utmost point ear is and presets the distance setting.
2. The fusing structure for a battery module according to claim 1, wherein the general tabs include a general positive tab (11) and a general negative tab (12).
3. The fusing structure for a battery module according to claim 1, wherein the predetermined distance is not less than 29.5 mm.
4. The fusing structure of claim 1, wherein the fusing part has a predetermined cross-sectional area smaller than that of the flow guide part.
5. The fusing structure of claim 4, wherein an opening is formed in the middle of the flow guide to form the fusing part.
6. The fusing structure for a battery module according to claim 1, wherein the fusing part has a melting point lower than that of the flow guide part.
7. The fusing structure of claim 6, wherein the current-guiding portion is a copper portion and the fusing portion is an aluminum portion.
8. The fusing structure for the battery module according to claim 1, wherein an insulating support (4) is arranged between the end of the battery module body (1) and the fused output electrode copper bar, and the fused output electrode copper bar is connected with the insulating support (4).
9. The fusing structure for the battery module according to claim 8, wherein the fusing type output electrode copper bar is spaced from the end surface of the insulating support (4) to form a heat dissipation space.
10. A battery module comprising the fusing structure for a battery module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020848345.3U CN211980741U (en) | 2020-05-20 | 2020-05-20 | Fusing structure for battery module and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020848345.3U CN211980741U (en) | 2020-05-20 | 2020-05-20 | Fusing structure for battery module and battery module |
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| Publication Number | Publication Date |
|---|---|
| CN211980741U true CN211980741U (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020848345.3U Active CN211980741U (en) | 2020-05-20 | 2020-05-20 | Fusing structure for battery module and battery module |
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| Country | Link |
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| CN (1) | CN211980741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946491A (en) * | 2021-01-22 | 2021-06-11 | 合肥国轩高科动力能源有限公司 | Device and method for testing safety of ternary lithium ion battery |
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2020
- 2020-05-20 CN CN202020848345.3U patent/CN211980741U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946491A (en) * | 2021-01-22 | 2021-06-11 | 合肥国轩高科动力能源有限公司 | Device and method for testing safety of ternary lithium ion battery |
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