CN220209225U - Connection piece, lithium ion battery and battery module - Google Patents
Connection piece, lithium ion battery and battery module Download PDFInfo
- Publication number
- CN220209225U CN220209225U CN202223574323.0U CN202223574323U CN220209225U CN 220209225 U CN220209225 U CN 220209225U CN 202223574323 U CN202223574323 U CN 202223574323U CN 220209225 U CN220209225 U CN 220209225U
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- CN
- China
- Prior art keywords
- metal layer
- layer
- ptc
- connecting sheet
- battery
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 70
- 239000002184 metal Substances 0.000 claims abstract description 70
- 239000003292 glue Substances 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 96
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 8
- 239000003063 flame retardant Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000007731 hot pressing Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000007373 indentation Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
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- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The utility model provides a connecting sheet, a lithium ion battery and a battery module. The connecting piece includes: a first metal layer; and a second metal layer disposed opposite to the first metal layer; the first metal layer and the second metal layer are respectively provided with at least one fusing area which is arranged oppositely, and the fusing areas are provided with through holes or gaps; a PTC layer between the first metal layer and the second metal layer; and a heat conducting glue layer is formed between the through hole or the notch and the PTC. When the connecting sheet disclosed by the utility model is used for quickly charging a battery, the PTC layer is additionally provided with an excessive overcurrent area, the heat conduction glue absorbs heat and reduces the temperature, and when the battery is in short circuit, high current passes through the connecting sheet, the temperature is quickly increased, the aluminum layer is fused, the internal resistance of the PTC layer is quickly increased, the output current is reduced, and the self-protection is realized.
Description
Technical Field
The utility model belongs to the technical field of power square shell batteries and connecting pieces, and particularly relates to a connecting piece, a lithium ion battery and a battery module.
Background
New energy vehicles are more and more popular, energy is higher and energy is higher, charging time is shorter and shorter, charging is carried out for 80% in 10-15min, charging time is shortened by increasing charging current in the prior art, but large temperature rise is brought about by large current charging, battery temperature is rapidly increased, service life is influenced, and potential safety hazards are brought about.
For a high-energy single battery, on one hand, large current is required to be charged and discharged, the overcurrent area of each structural member is required to be enlarged, the overcurrent requirement is met, on the other hand, the battery is required to be provided with a Fuse safety design, the overcurrent area is small, when abused or external short-circuited, large current is fused through the Fuse, self-protection is realized, the battery is charged quickly and is required to be fused, the overcurrent area is required to be large, and the Fsue is required to be small, so that the battery and the Fuse are mutually restricted.
Disclosure of Invention
In view of the above, the present utility model is directed to a connecting sheet, a lithium ion battery and a battery module, which solve at least one of the above problems.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
a connecting sheet structure comprises a first metal layer; and a second metal layer disposed opposite to the first metal layer;
the first metal layer and the second metal layer are respectively provided with at least one fusing area which is arranged oppositely, and the fusing areas are provided with through holes or gaps; a PTC layer between the first metal layer and the second metal layer;
and a heat conducting glue layer is formed between the through hole or the notch and the PTC.
Further, the heat conducting glue layer covers at least one part of the through hole or the notch.
Further, the first metal layer and the second metal layer are copper or aluminum.
Further, the thicknesses of the first metal layer and the second metal layer are the same and are 0.2-0.4mm.
Further, the thickness of the PTC layer is 0.2-0.4mm.
Further, the heat conducting glue layer covers all areas of the through holes or the gaps.
Further, the first metal layer, the second metal layer and the PTC layer form the connection sheet by means of molecular diffusion welding or hot pressing.
Further, a flame-retardant medium is formed on the heat conducting glue layer, and the flame-retardant medium is a substance which is heated and gasified or liquefied at 500-600 degrees.
A lithium ion battery comprising a connecting tab as described above.
A battery module comprises the lithium ion battery or the connecting sheet.
Compared with the prior art, the connecting sheet structure has the following beneficial effects:
1. when the connecting piece battery is used for quick charging, the PTC layer is provided with an extra overcurrent area, the heat conducting glue absorbs heat and reduces the temperature, when in short circuit, large current passes through the connecting piece, the temperature is quickly increased, the aluminum layer is fused, the internal resistance of the PTC layer is quickly increased, the output current is reduced, and self-protection is realized.
2. Through the collocation design of multiple materials, the multifunctional performance of the connecting sheet is realized, and the service performance of the single battery in various application occasions is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of a connecting piece according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a metal layer of a connecting piece structure according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of a raw material layer according to an embodiment of the present utility model.
Reference numerals illustrate:
1. a PTC layer; 21. a first metal layer; 22. a second metal layer; 3. a heat conducting adhesive layer; 4. and a fuse region.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
The utility model will be described in detail below with reference to the drawings in connection with embodiments.
The utility model provides a connecting sheet structure, which comprises:
a first metal layer 21; and
a second metal layer 22 disposed opposite to the first metal layer 21;
the first metal layer 21 and the second metal layer 22 are respectively provided with at least one fusing area 4 which is arranged oppositely, and the fusing area 4 is provided with a through hole or a notch;
a PTC layer 1 between the first metal layer 21 and the second metal layer 22; and a heat conducting glue layer 3 is formed between the through hole or the notch and the PTC.
According to the utility model, the PTC layer 1 is added between the two metal layers, when the connecting sheet battery is used for quick charge, the PTC layer 1 is added with an extra overcurrent area, the heat conducting glue absorbs heat, the temperature is reduced, when the battery is in short circuit, a large current passes through the connecting sheet, the temperature is quickly increased, the aluminum layer is fused, the internal resistance of the PTC layer 1 is quickly increased, the output current is reduced, and self protection is realized. Meanwhile, through the collocation design of various materials, the versatility of the connecting sheet is realized, and the service performance of the single battery in various application occasions is improved.
In a preferred embodiment of the present utility model, the first metal layer 21 and the second metal layer 22 are both copper or aluminum. When the connecting sheet is used for the positive electrode, the first metal layer 21 and the second metal layer 22 are both made of aluminum. When the connecting sheet is used for the negative electrode, the first metal layer 21 and the second metal layer 22 are both made of copper.
In a preferred embodiment of the present utility model, the thickness of the first metal layer 21 and the second metal layer 22 is the same, and is 0.2-0.4mm. The first metal layer 21 and the second metal layer 22 have the same thickness, and the same overcurrent and fuse current can be ensured.
The thickness of the first metal layer 21 and the second metal layer 22 is lower than 0.2mm, the overcurrent capacity is low, the internal resistance of the whole connecting sheet is large, and if it is higher than 0.4mm, the connecting sheet thickness is large, affecting the internal space.
In a preferred embodiment of the present utility model, the thickness of the PTC layer 1 is 0.2 to 0.4mm.
If the thickness of the PTC layer 1 is less than 0.2mm, the increase in overcurrent capacity is small, and if it is more than 0.4mm, the internal resistance of the connection sheet is affected, resulting in an excessive internal resistance of the connection sheet.
In a preferred embodiment of the utility model, the heat conductive glue layer 3 covers at least a part of the through holes or indentations, preferably all areas.
In a preferred embodiment of the utility model, the first metal layer 21, the second metal layer 22 and the PTC layer 1 are formed by means of molecular diffusion welding or hot pressing.
In a preferred embodiment of the present utility model, the heat conductive adhesive layer 3 is formed with a flame retardant medium, and the flame retardant medium is a substance that is vaporized or liquefied by heating at 500-600 °. Through forming the flame retardant medium, a flame retardant isolation layer can be formed around the battery to prevent oxygen and air from entering between the anode and the cathode to participate in combustion reaction, so that the safety of the battery is improved.
As shown in fig. 3, in the preparation, the first metal layer 21, the PTC layer 1 and the second metal layer 22 are sequentially placed, the first metal layer 21 and the second metal layer 22 are made of aluminum, the thicknesses of the first metal layer 21 and the second metal layer 22 are the same, the thicknesses of the first metal layer 21 and the second metal layer 22 are 0.2-0.4mm, the thickness of the PTC layer 1 is 0.2-0.4mm, and the first metal layer, the PTC layer 1 and the second metal layer are formed into a whole through molecular diffusion welding or hot pressing, and then gaps among the heat-conducting silica gel can are used to obtain the structure of fig. 1.
Table 1 150Ah cell design meets 2C charge and discharge, connection piece contrast
0.4 x 30 x 2 layer al+0.4 x 40mmptc: the thickness of the first metal layer 21 and the second metal layer 22 is 0.4mm, and the first metal layer 21 and the second metal layer 22 are all aluminum; at the fuse region 4, the width of aluminum was 30mm, the width of the ptc layer 1 was 40mm, and the thickness was 0.4mm.
As shown in Table 1, the common bar (the existing connecting sheet of the pure aluminum sheet with fuse holes) cannot meet the requirements of high-current low-temperature and short-circuit at the same time, and the design bar can be compatible with high-current low-temperature and short-circuit fuse protection.
Claims (10)
1. A connecting tab, comprising:
a first metal layer; and
the second metal layer is arranged opposite to the first metal layer;
the first metal layer and the second metal layer are respectively provided with at least one fusing area which is arranged oppositely, and the fusing areas are provided with through holes or gaps;
a PTC layer between the first metal layer and the second metal layer;
and a heat conducting glue layer is formed between the through hole or the notch and the PTC.
2. The connection pad of claim 1, wherein the thermally conductive adhesive layer covers at least a portion of the through hole or indentation.
3. The connecting tab of claim 1 wherein the first and second metal layers are each copper or aluminum.
4. A connecting sheet according to any one of claims 1 to 3, wherein the first and second metal layers are the same thickness, each 0.2 to 0.4mm.
5. A connecting sheet as claimed in any one of claims 1 to 3, wherein the PTC layer has a thickness of 0.2 to 0.4mm.
6. A connecting sheet according to any one of claims 1-3, wherein the layer of thermally conductive glue covers all areas of the through holes or indentations.
7. A connecting sheet according to any one of claims 1 to 3, wherein the first metal layer, the second metal layer and the PTC layer are formed by means of molecular diffusion welding or hot pressing.
8. A connecting sheet according to any one of claims 1 to 3, wherein a flame retardant medium is formed on the heat conductive adhesive layer, the flame retardant medium being a substance which is vaporised or liquefied by heating at 500 to 600 °.
9. A lithium ion battery, characterized in that: comprising a connecting piece according to any one of claims 1-8.
10. A battery module, characterized in that: a lithium ion battery comprising a connecting tab according to any one of claims 1-8 or a lithium ion battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223574323.0U CN220209225U (en) | 2022-12-30 | 2022-12-30 | Connection piece, lithium ion battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223574323.0U CN220209225U (en) | 2022-12-30 | 2022-12-30 | Connection piece, lithium ion battery and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220209225U true CN220209225U (en) | 2023-12-19 |
Family
ID=89155750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223574323.0U Active CN220209225U (en) | 2022-12-30 | 2022-12-30 | Connection piece, lithium ion battery and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220209225U (en) |
-
2022
- 2022-12-30 CN CN202223574323.0U patent/CN220209225U/en active Active
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