CN209747629U - Compound utmost point ear subassembly, soft packet of power battery and vehicle - Google Patents

Compound utmost point ear subassembly, soft packet of power battery and vehicle Download PDF

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Publication number
CN209747629U
CN209747629U CN201920733970.0U CN201920733970U CN209747629U CN 209747629 U CN209747629 U CN 209747629U CN 201920733970 U CN201920733970 U CN 201920733970U CN 209747629 U CN209747629 U CN 209747629U
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China
Prior art keywords
tab
positive
composite
battery
negative
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Active
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CN201920733970.0U
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Chinese (zh)
Inventor
史百胜
王志宇
于贺
渠雁晓
高顺航
娄佳训
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Svolt Energy Technology Co Ltd
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Svolt Energy Technology Co Ltd
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Priority to CN201920733970.0U priority Critical patent/CN209747629U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model relates to the field of power batteries, and discloses a composite tab assembly, a soft package power battery and a vehicle, wherein the composite tab assembly comprises a positive tab, a negative tab and an insulating spacer, the positive tab and the negative tab are respectively embedded at two sides of the insulating spacer so as to lead the positive tab and the negative tab to be arranged in parallel at intervals; the positive pole lug is provided with a safety fusing part which is electrically connected with an internal circuit of a battery cell pole group of the battery. The utility model discloses effectively promote the space that soft packet of power battery can utilize, and then promote soft packet of power battery's energy density; meanwhile, the positive electrode lug is provided with a fuse fusing structure, so that the safety performance is good.

Description

Compound utmost point ear subassembly, soft packet of power battery and vehicle
Technical Field
The utility model relates to a power battery specifically relates to a compound utmost point ear subassembly, soft packet of power battery and vehicle.
Background
The soft package power battery is used as a core component and an energy source of an electric automobile, and the safety performance and the energy density of the soft package power battery become the focus of increasing attention. The main structural parts of the soft package power battery comprise an aluminum plastic film, a positive electrode tab, a negative electrode tab and the like. The requirements of the module layer of the existing soft package power battery on the sizes of the main structural components (the aluminum-plastic film shell, the positive electrode tab and the negative electrode tab) are far greater than those of the existing digital soft package battery. Because the increase of utmost point ear size, the structure that traditional homonymy set up positive, negative pole utmost point ear respectively has been replaced by the structure that the heteropleural set up utmost point ear respectively, and its leading cause is exactly that the homonymy sets up simultaneously positive, negative pole utmost point ear can receive the restriction of size, brings inconvenience for arranging of battery overall structure. Although the different sides set up utmost point ear respectively and solved this difficult problem, on the same basis of the whole length of battery, set up respectively and occupied soft packet of power battery's overall space simultaneously at the utmost point ear of the different side of electric core utmost point group, lead to the usable space of electric core to reduce, and then energy density is difficult to improve. In addition, while attention is paid to the energy density of the soft package power battery, the safety performance of the soft package power battery in the case of external short circuit is attracting increasing attention. When the soft-packaged battery cell is in case of external short circuit, the internal temperature of the battery cell rises instantly, and meanwhile, the internal of the battery cell rapidly generates gas instantly, so that the aluminum-plastic film bulges instantly, and the conditions of liquid leakage, smoke, fire, explosion and the like occur, and the safety of a user is seriously threatened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the problems of low energy density and poor safety of the soft package power battery in the prior art, providing a composite tab assembly, a soft package power battery and a vehicle, effectively improving the available space of the soft package power battery, and further improving the energy density of the soft package power battery; meanwhile, the positive electrode lug is provided with a fuse fusing structure, so that the safety performance is good.
In order to achieve the above object, the present invention provides a composite tab assembly, including a positive electrode tab, a negative electrode tab and an insulating spacer, wherein the positive electrode tab and the negative electrode tab are respectively embedded at two sides of the insulating spacer so that the positive electrode tab and the negative electrode tab are spaced from each other and arranged in parallel; and the positive pole lug is provided with a safety fusing part which is electrically connected with an internal circuit of a battery cell pole group of the battery.
Preferably, the fuse fusing part comprises a strip-shaped body, and a plurality of through holes are formed in the body so that the rest part of the body forms a fusing point.
Preferably, the fuse fusing part is disposed at a lower portion of the positive electrode tab.
Preferably, the body is fixedly arranged at the lower part of the positive pole lug plate through a lug glue, and a lug glue layer is formed around the body.
Preferably, the body is an aluminum sheet.
preferably, the sheet bottom of the positive electrode lug and the negative electrode lug is respectively provided with a positive electrode lug extension end connected with the leading-out end of the positive electrode current collector of the battery and a negative electrode lug extension end connected with the leading-out end of the negative electrode current collector of the battery.
Preferably, the extension end of the positive electrode tab piece and the extension end of the negative electrode tab piece are arranged below the safety fuse part.
Preferably, the extension direction of the extension end of the positive pole tab sheet is opposite to that of the extension end of the negative pole tab sheet.
The utility model discloses the second aspect provides a soft packet of power battery, be in including plastic-aluminum membrane and setting battery electric core utmost point group in the plastic-aluminum membrane is still including setting up battery electric core utmost point group top as above compound utmost point ear subassembly.
The utility model discloses the third aspect provides a vehicle, include as above laminate polymer power battery.
Through the technical scheme, the utility model discloses positive, negative pole utmost point auricle with soft packet of power battery is integrated for compound utmost point ear subassembly through insulating spacer interval parallel arrangement's mode to be equipped with insurance fuse portion on the positive pole utmost point auricle in compound utmost point ear subassembly, effectively promote the space that soft packet of power battery can utilize, and then promote soft packet of power battery's energy density and security performance.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the composite tab assembly of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 in the direction A;
FIG. 3 is a schematic view of the structure of FIG. 1 in the direction B;
Fig. 4 is the overall structure schematic diagram of an embodiment of the soft-packaged power battery of the present invention.
Description of the reference numerals
P composite tab assembly 100 positive tab
110 anode tab extension end 200 cathode tab
300 insulating spacer at extended end of 210 negative pole lug
400 insurance fuse 410 body
411 through hole 412 break point
500 aluminium-plastic film 600 battery cell pole group
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and right as illustrated with reference to the accompanying drawings; "inner and outer" generally refer to the inner and outer relative to the profile of the components themselves; "distal and proximal" generally refer to the inner and outer contours relative to the components themselves.
As shown in fig. 1 in combination with fig. 2 and fig. 3, an aspect of the present invention provides a composite tab assembly P, which mainly includes a positive tab 100, a negative tab 200 and an insulating spacer 300, wherein the positive tab 100 and the negative tab 200 are respectively embedded in two sides of the insulating spacer 300, so that the positive tab and the negative tab are spaced from each other. The positive electrode tab 100 is provided with a fuse 400 for electrically connecting to an internal circuit of a battery cell electrode group of the battery. The utility model discloses positive, negative pole auricle with soft packet of power battery is integrated for compound utmost point ear subassembly through insulating spacer interval parallel arrangement's mode to be equipped with insurance fusing part on the positive pole auricle in compound utmost point ear subassembly, effectively promote the space that soft packet of power battery can utilize, and then promote soft packet of power battery's energy density and security performance.
Preferably, the fuse link 400 includes a strip-shaped body 410, and a plurality of through holes 411 are formed in the body 410, so that the remaining portion of the body forms a fusing point 412, i.e., a circle portion shown in fig. 2. The area of the portion 412 of the melting point is the flow area, and the size of the flow area is in direct proportion to the fusing time of the melting point, that is, the larger the flow area of the melting point is, the longer the fusing time is, and vice versa. The fuse 400 is connected to the lower portion of the positive tab 100.
In order to ensure that the secondary short circuit caused by the overlapping of the fused parts can not occur after the fusing point is fused, the body 410 is fixedly arranged at the lower part of the positive pole lug piece 100 through a lug glue, and a lug glue layer is formed around the body. Once fused, the fused portion is wrapped by tab glue without any accidental overlap with other components.
In order to reach better fusing effect, body 410 of insurance fusing portion 400 is the aluminum sheet, and its electric conductive property is good, and the fusing point is lower simultaneously, and when the outside short circuit that takes place, because the swell of temperature makes insurance fusing portion can fuse in the twinkling of an eye, and then the internal circuit of disconnection electric core, can prevent that electric core from being on fire the explosion because of the short circuit, the quick response effectively improves sensitivity.
In addition, for convenience of connection, the sheet bottom of the positive electrode tab 100 and the negative electrode tab 200 are respectively provided with a positive electrode tab extension end 110 for connecting with the leading-out end of the positive electrode current collector of the battery and a negative electrode tab extension end 210 for connecting with the leading-out end of the negative electrode current collector of the battery. In order to optimize the structural arrangement and facilitate the connection and use, the anode tab extension end 110 and the cathode tab extension end 210 are disposed under the safety fuse 400. Preferably, the extension directions of the anode tab sheet extension end 110 and the cathode tab sheet extension end 210 are opposite.
As shown in fig. 4, the second aspect of the present invention provides a soft package power battery, which comprises an aluminum-plastic film 500 and a battery cell pole group 600 arranged in the aluminum-plastic film 500, and further comprises a composite tab assembly P arranged on the top end of the battery cell pole group 600. The composite tab assembly P mainly comprises a positive tab 100 and a negative tab 200, wherein the positive tab 100 and the negative tab 200 are respectively embedded at two sides of the insulating spacer 300, so that the positive tab and the negative tab are arranged in parallel at intervals. Specifically, the positive and negative electrode tab pieces can be arranged in the insulating spacer by adopting a hot-inlaying process method to form a composite tab assembly P, so that the insulation and the sealing performance of the positive electrode tab piece and the negative electrode tab piece can be ensured. The positive and negative electrode composite tabs are fixed on the aluminum-plastic film 500 in a hot melting manner, the periphery of the aluminum-plastic film 500 is also packaged in a hot melting manner, the effects of insulation and sealing between the positive and negative electrode tabs can be achieved simultaneously, and the positive and negative electrode composite tabs are welded with the leading-out ends of the positive and negative current collectors of the battery cell electrode group 600 through the extension and the breakage of the positive and negative electrode tab pieces.
The utility model discloses the third aspect provides a vehicle, include as above laminate polymer power battery.
From the above, the technical problem to be solved by the present invention is to overcome the problems of low energy density and poor safety of the soft package power battery in the prior art, and to provide a composite tab assembly, a soft package power battery and a vehicle, wherein the positive and negative electrode tabs of the soft package power battery are integrated into the composite tab assembly in a manner of parallel arrangement at intervals by insulating spacers, and a safety fuse is arranged on the positive electrode tab in the composite tab assembly; when a short circuit occurs outside the battery cell pole group, the fuse fusing part can be fused, so that the internal circuit of the battery cell pole group is instantly disconnected, and further sudden temperature rise inside the battery cell pole group and gas accumulation inside the battery cell pole group are avoided, and the fire explosion phenomenon of a soft package power battery is avoided. Meanwhile, because the tab glue layer is formed around the body of the fuse fusing part, after the tab glue layer is fused, the danger of secondary short circuit caused by overlap joint can be avoided. Therefore, the utility model discloses a through setting up compound utmost point ear subassembly, promoted the space that soft packet of power battery can utilize, and then promoted soft packet of power battery's energy density; and the safety guarantee of the soft package power battery is increased through the arrangement of the fuse fusing part, and other tests and use performances of the battery cell pole group can not be influenced.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical concept of the utility model is in the scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, for example, can change into multiple structural style such as oval, oblate or discontinuity hole with the through-hole shape on the lamellar body of insurance fusing portion by the rectangle. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims (10)

1. the composite tab assembly is characterized by comprising a positive tab (100), a negative tab (200) and an insulating spacer (300), wherein the positive tab (100) and the negative tab (200) are respectively embedded at two sides of the insulating spacer (300) so that the positive tab and the negative tab are arranged in parallel at intervals; and the positive pole lug (100) is provided with a safety fusing part (400) which is electrically connected with an internal circuit of a battery cell pole group of the battery.
2. The composite tab assembly of claim 1 wherein the safety fuse (400) comprises a strip-shaped body (410), and the body (410) is provided with a plurality of through holes (411) to allow the remainder of the body (410) to form a fuse point (412).
3. The composite tab assembly of claim 2 wherein the safety fuse (400) is disposed on a lower portion of the positive tab (100).
4. The composite tab assembly of claim 2 or 3, wherein the body (410) is fixedly arranged at the lower part of the positive tab (100) through tab glue, and a tab glue layer is formed around the body (410).
5. The composite tab assembly of claim 2 wherein the body (410) is an aluminum sheet.
6. The composite tab assembly of claim 1 or 2, wherein the bottom of the positive electrode tab (100) and the negative electrode tab (200) are respectively provided with a positive electrode tab extension end (110) for connecting with the lead-out end of the positive electrode current collector of the battery and a negative electrode tab extension end (210) for connecting with the lead-out end of the negative electrode current collector of the battery.
7. The composite tab assembly of claim 6 wherein the positive tab extension end (110) and the negative tab extension end (210) are disposed below the safety fuse (400).
8. The composite tab assembly of claim 6, wherein the extended ends (110, 210) of the positive and negative electrode tab pieces extend in opposite directions.
9. A soft package power battery, which comprises an aluminum-plastic film and a battery cell pole group arranged in the aluminum-plastic film, and is characterized by further comprising the composite tab assembly as claimed in any one of claims 1 to 8 arranged at the top end of the battery cell pole group.
10. A vehicle comprising the pouch power cell of claim 9.
CN201920733970.0U 2019-05-21 2019-05-21 Compound utmost point ear subassembly, soft packet of power battery and vehicle Active CN209747629U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920733970.0U CN209747629U (en) 2019-05-21 2019-05-21 Compound utmost point ear subassembly, soft packet of power battery and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920733970.0U CN209747629U (en) 2019-05-21 2019-05-21 Compound utmost point ear subassembly, soft packet of power battery and vehicle

Publications (1)

Publication Number Publication Date
CN209747629U true CN209747629U (en) 2019-12-06

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Country Status (1)

Country Link
CN (1) CN209747629U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113661608A (en) * 2020-12-22 2021-11-16 宁德新能源科技有限公司 Electrochemical device and electricity utilization device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113661608A (en) * 2020-12-22 2021-11-16 宁德新能源科技有限公司 Electrochemical device and electricity utilization device
WO2022133710A1 (en) * 2020-12-22 2022-06-30 宁德新能源科技有限公司 Electrochemical device and electrical device

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