CN219419235U - Full-tab cover plate, battery cell and battery module - Google Patents
Full-tab cover plate, battery cell and battery module Download PDFInfo
- Publication number
- CN219419235U CN219419235U CN202223416994.4U CN202223416994U CN219419235U CN 219419235 U CN219419235 U CN 219419235U CN 202223416994 U CN202223416994 U CN 202223416994U CN 219419235 U CN219419235 U CN 219419235U
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- tab
- pin
- cover plate
- full
- electrode tab
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- 230000000712 assembly Effects 0.000 claims abstract description 80
- 238000000429 assembly Methods 0.000 claims abstract description 80
- 238000004804 winding Methods 0.000 claims abstract description 23
- 238000005452 bending Methods 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000003466 welding Methods 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- 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 utility model relates to the field of power batteries, in particular to a full-tab cover plate, a battery core and a battery module, wherein the full-tab cover plate comprises a cover plate member, poles are arranged on two sides of the upper end of the cover plate member, two pin assemblies are arranged at the lower end of the cover plate member and are respectively opposite to the two poles, each group of pin assemblies comprises two oppositely arranged pins, and a clamping cavity for clamping the tab is arranged between the two oppositely arranged pins contained in each pin assembly; the battery core comprises a full-lug cover plate, wherein two groups of pins of the cover plate member are respectively clamped and connected with the positive electrode lug and the negative electrode lug of the winding core. According to the utility model, through the structural design of the two groups of pins, the structure of the full lug cover plate is more stable; when the battery pack is used, the two groups of pins can be clamped firmly with the positive electrode tab and the negative electrode tab of the winding core respectively, and the clamping effect is better, so that the stability and the safety of the battery module are improved; meanwhile, the contact area between the pin and the winding core can be increased, and the overcurrent area is increased.
Description
Technical Field
The utility model relates to the field of power batteries, in particular to a full-tab cover plate, an electric core and a battery module.
Background
Lithium ion power batteries have entered a large-scale use stage. The square lithium ion battery comprises a battery shell, a battery cover plate, anode and cathode materials, a diaphragm, electrolyte and the like. The lithium battery cover plate is a main structural member of the lithium battery and is generally composed of a cover plate substrate, positive and negative poles, positive and negative pins and the like.
At present, most of existing cover plate pins adopt a single-strip structure, and the structure is extremely unstable when connected with a winding core, and is easy to separate from the winding core under the action of external force, so that the safety of a lithium battery is greatly influenced. Meanwhile, the contact area of the single pin and the lug protruding part is limited, the overcurrent capacity of the pin is greatly reduced, the power performance of the battery core is reduced, the battery is easy to overheat, the safety performance of the battery is influenced, the lug and the pin are connected together in an ultrasonic welding mode, and the lug is connected with an external circuit for charging and discharging, so that the battery production process is increased by one welding process, and the production efficiency is reduced. Because the tab is connected with the pin through the welding spot, the contact area is small, and when the battery is charged and discharged at high multiplying power, the high current easily causes the welding spot to generate heat seriously, explosion easily occurs, and potential safety hazard exists.
Disclosure of Invention
The utility model aims at: the utility model provides a current apron pin that exists adopts single structure, and this kind of structure is extremely unstable, under the exogenic action, easily breaks away from with the core, very big influence lithium cell's security to and adopt single formula pin can reduce the technical problem of the overcurrent capacity of pin, provide a full utmost point ear apron, still provide an electric core, and a battery module.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a full utmost point ear apron, includes the apron component, apron component upper end both sides are equipped with the utmost point post, apron component lower extreme is equipped with two pin assemblies, two the pin assembly respectively with two the utmost point post sets up relatively, every group the pin assembly includes two first pins and the second pin of setting relatively, form the centre gripping chamber that is used for centre gripping utmost point ear between first pin and the second pin.
The utility model relates to a full-lug cover plate, which is characterized in that two sides of the upper end of a cover plate component are provided with polar posts, the lower end of the cover plate component is provided with two groups of pin assemblies, the two groups of pin assemblies are respectively and vertically arranged corresponding to the two polar posts and the cover plate component, and each group of pin assemblies comprises two oppositely arranged pins. Through the structural design of the two groups of pin assemblies, the structure of the full lug cover plate is more stable; when the battery pack is used, the two groups of pin assemblies can be clamped firmly with the positive electrode lug and the negative electrode lug of the winding core respectively, the clamping effect of the two groups of pin assemblies on the winding core is better, the whole structure is connected more stably, falling or falling caused by unstable contact between the lug and the pin assemblies is avoided, the structural strength is high, and the safety of the battery pack is high; meanwhile, the positive electrode lug and the negative electrode lug of the winding core are respectively clamped by each group of two pin assemblies, so that the contact area between each group of pin assemblies and the winding core can be effectively increased, the overcurrent area of the pin assemblies can be increased, and the power performance of the battery core is improved.
As a preferred scheme of the utility model, a plurality of convex structures are arranged on the surfaces opposite to the pin assemblies in the same group and are used for increasing the overcurrent area.
As a preferable scheme of the utility model, the convex structures are uniformly arranged on the inner side surface of the pin assembly, the fluidity is enhanced, and simultaneously the attractive effect is improved, and the convex structures are arranged in two rows and a plurality of rows on the pin assembly, so that the space utilization rate is improved as much as possible on the premise of not affecting the fluidity in a limited space.
As a preferable scheme of the utility model, the shapes and the sizes of the convex structures are the same, the height is 1-5mm, and the contact between the two pin assemblies is avoided.
As a preferable scheme of the utility model, the two pin assemblies of each group are identical in size and length and are arranged in parallel, so that the processing and the subsequent installation are convenient.
As a preferable scheme of the utility model, each pin assembly of each group is provided with a bending part at one end close to the cover plate component, the bending parts are oppositely arranged in each group, and the interval between the bending parts is larger than the interval between two oppositely arranged pin assemblies, so as to stably clamp the pole lugs and increase the contact area of the pin assemblies after the pin assemblies are connected with the pole lugs.
As a preferable scheme of the utility model, each group of positive pins or negative pins comprises a first pin and a second pin.
As a preferred embodiment of the present utility model, each set of the pin assemblies is symmetrically disposed with respect to the cover plate member.
As the preferable scheme of the utility model, each group of pin assemblies corresponds to the pole post to form a structural part integrally, welding is avoided, the cost is reduced, and the structure is more stable and reliable.
The utility model also provides a battery cell, which comprises the full-tab cover plate, wherein the two groups of pin assemblies of the cover plate member are respectively connected with the positive electrode tab and the negative electrode tab of the winding core and are mutually clamped and connected.
The cover plate of the battery cell is set to be the full-lug cover plate, and the pin assembly below the cover plate is connected with the positive electrode lug and the negative electrode lug in a clamping mode, so that the connection between the pin assembly and the lug is more stable compared with the original single pin, and the stability in the battery cell is enhanced.
As a preferable scheme of the utility model, the upper end and the lower end of the positive electrode tab and the negative electrode tab are respectively provided with a tab protruding part, the thickness of each tab protruding part is larger than that of the middle part between the two tab protruding parts, each group of two pin assemblies are in clamping connection with the middle parts of the corresponding positive electrode tab and the corresponding negative electrode tab, the tab protruding parts positioned at the upper ends of the positive electrode tab or the negative electrode tab are arranged at the bending parts of the two pin assemblies, and the tab protruding parts positioned at the lower ends of the positive electrode tab or the negative electrode tab are arranged at the outer sides of the lower ends of the two pin assemblies, so that the stability of the tab after being connected with the pin assemblies is increased and the tab is not easy to fall.
As a preferable scheme of the utility model, the lug protruding parts at the upper ends of the positive electrode lug and the negative electrode lug are provided with two oppositely arranged inclined planes, and the two bending parts of each group of pin assemblies are matched with and attached to the two inclined planes corresponding to the lug protruding parts in shape, so that the lug and the pin assemblies can be tightly connected, and the pin assemblies are prevented from being separated from the winding core.
The utility model also provides a battery module, which comprises the battery cell.
The utility model relates to a battery module, wherein a pole column on a cover plate of the battery module is integrated with a pin assembly, and the pin assembly is of a double-strip type pin structure, so that the structural strength of the battery module is improved, and a cylindrical protruding structure is arranged at the pin assembly, so that the overcurrent area can be effectively increased when a battery cell works, and the power performance of the battery cell is improved.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
1. the utility model relates to a full-lug cover plate, which is more stable in structure through the structural design of two groups of pin assemblies; when the battery pack is used, the two groups of pin assemblies can be clamped firmly with the positive electrode lug and the negative electrode lug of the winding core respectively, the clamping effect of the two groups of pin assemblies on the winding core is better, the whole structure is connected more stably, falling or falling caused by unstable contact between the lug and the pin assemblies is avoided, the structural strength is high, and the safety of the battery pack is high; meanwhile, the positive electrode lug and the negative electrode lug of the winding core are respectively clamped by each group of two pin assemblies, so that the contact area between each group of pin assemblies and the winding core can be effectively increased, the overcurrent area of the pin assemblies can be increased, and the power performance of the battery core is improved.
2. The cover plate of the battery cell is set to be the full-lug cover plate, and the pin assembly below the cover plate is connected with the positive electrode lug and the negative electrode lug in a clamping mode, so that the connection between the pin assembly and the lug is more stable compared with the original single pin, and the stability in the battery cell is enhanced.
3. The utility model relates to a battery module, wherein a pole column on a cover plate of the battery module is integrated with a pin assembly, and the pin assembly is of a double-strip type pin structure, so that the structural strength of the battery module is improved, and a cylindrical protruding structure is arranged at the pin assembly, so that the overcurrent area can be effectively increased when a battery cell works, and the power performance of the battery cell is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic side view of the cover plate of the present utility model;
FIG. 3 is a schematic diagram of the structure of the monolithic pin state of the present utility model;
FIG. 4 is a schematic diagram of a lead structure according to the present utility model;
FIG. 5 is a schematic view of the structure of the present utility model;
FIG. 6 is a schematic side elevational view of the present utility model;
fig. 7 is a partially enlarged structural schematic diagram at a in fig. 6.
Icon: 1-a cover member; 2-pole; a 3-pin assembly; 4-electrode lugs; 5-winding the core; 6-a bump structure; 7-bending parts; 8-clamping cavity; 31-an anode pin; 32-negative electrode pins; 33-a first pin; 34-a second pin; 41-positive electrode lugs; 42-negative electrode lugs; 43-tab projections; 44-inclined plane.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
The full tab cover plate shown in fig. 1-2 comprises a cover plate member 1, wherein two sides of the upper end of the cover plate member 1 are provided with pole posts 2, the lower end of the cover plate member 1 is provided with two groups of pin assemblies 3, the two groups of pin assemblies 3 are respectively arranged opposite to the two pole posts 2, each group of pin assemblies 3 is composed of a first pin 33 and a second pin 34 which are oppositely arranged, a clamping cavity 8 for clamping a tab 4 is formed between the first pin 33 and the second pin 34, one group of pin assemblies (3) is a positive pin (31) and the other group of pin assemblies is a negative pin (32), the two groups of pin assemblies 3 are respectively arranged below the cover plate member 1, each group of pin assemblies 3 are symmetrically arranged relative to the middle part of the cover plate member 1, the pin assemblies 3 below the cover plate member 1 are divided into two groups, and each group of pin assemblies is provided with two opposite first pins 33 and second pins 34, so that stability is better when the pin assemblies 3 are connected with the tab 4.
As shown in fig. 3-4, the opposite surfaces of the pin assemblies (3) in the same group are provided with a plurality of protruding structures (6), the opposite surfaces of the first pins 33 and the second pins 34 of the pin assemblies (3) are provided with protruding structures (6), the surface area of the pins (3) is increased by arranging the protruding structures, the overcurrent area is increased when the pin assemblies (3) are connected and clamped with the lugs (4), the protruding structures (6) are arranged in a mode of two rows and a plurality of rows on the pin assemblies (3), and the number of the protruding structures (6) is also arranged in a limited space as much as possible while the aesthetic property is improved.
The above-mentioned bump structures 6 have the same size and shape, and the height of each bump structure 6 is 1-5mm, and since the bump structures 6 are disposed on the inner sides of the lead assemblies 3 to avoid contact between the opposite lead assemblies 3 caused by the excessive height of the bump structures 6, as shown in fig. 4.
The first pin assembly 33 and the second pin assembly 34 disposed on each pin assembly 3 are formed to have the same size and length, and are all disposed in parallel, so that subsequent connection and installation are facilitated, as shown in fig. 2.
Each of the above-mentioned pin assemblies 3 is provided with a bending portion 7 at one end close to the cover plate member 1, and the bending portions 7 are oppositely arranged in each group, and the distance between the bending portions 7 is greater than the distance between the two oppositely arranged pin assemblies 3, so that the pin assemblies 3 can be connected with the tab 4 more firmly, and the tab 4 is prevented from falling, as shown in fig. 4.
The pin assembly 3 corresponds to the pole 2 and is an integrally formed structural member, the pin assembly 3 and the pole 2 are integrally formed, later welding is not needed, the structure is simple, and the cost is reduced.
According to the full-lug cover plate, the structure of the full-lug cover plate is more stable through the structural design of the two groups of pin assemblies; when the battery pack is used, the two groups of pin assemblies 3 can be firmly clamped with the positive electrode lug 41 and the negative electrode lug 42 of the winding core 5 respectively, the clamping effect of the two groups of pin assemblies 3 on the winding core 5 is better, the whole structure is connected more stably, falling or falling caused by unstable contact between the positive electrode lug 41 and the negative electrode lug 42 of the winding core 5 and the pin assemblies 3 is avoided, the structural strength is high, and the safety of the battery module is high; meanwhile, the anode tab 41 and the cathode tab 42 of the winding core 5 are respectively clamped by each group of two pin assemblies 3, so that the contact area between each group of pin assemblies 3 and the winding core 5 can be effectively increased, the overcurrent area of the pin assemblies 3 can be increased, and the power performance of the battery core is improved.
Example 2
As shown in fig. 5-6, a battery cell includes the above-mentioned full tab cover, and two groups of pin assemblies 3 of the cover member 1 are respectively connected with the positive electrode tab 41 and the negative electrode tab 42 of the winding core 5 and are clamped and connected with each other, so that the cover member 1 is integrated with the positive electrode tab 41 and the negative electrode tab 42 through the pin assemblies 3.
The plurality of protruding structures 6 arranged on the pin assembly 3 are in contact connection with the surfaces of the positive electrode tab 41 and the negative electrode tab 42 which are correspondingly arranged, so that the tab 4 can be completely contacted with the protruding structures 6, and the efficiency of the battery cell is improved, as shown in fig. 6.
The upper and lower ends of the positive electrode tab 41 and the negative electrode tab 42 are respectively provided with a tab protruding portion 43, the thickness of each tab protruding portion 43 is larger than the middle portion between the two tab protruding portions 43, each group of two pin assemblies 3 is clamped and connected with the middle portion of the corresponding positive electrode tab 41 and the corresponding negative electrode tab 42, the tab protruding portions 43 positioned at the upper ends of the positive electrode tab 41 or the negative electrode tab 42 are arranged at the bending portions 7 of the two pin assemblies 3, the tab protruding portions 43 positioned at the lower ends of the positive electrode tab 41 or the negative electrode tab 42 are arranged at the outer sides of the lower end portions of the two pin assemblies 3, and the tab protruding portions 43 are arranged to play a role in placing the tab 4 to be connected with the pin assemblies 3 and then the tab 4 falls off, as shown in fig. 6-7.
Further, as shown in fig. 6-7, the tab protruding portion 43 located at the upper ends of the positive electrode tab 41 and the negative electrode tab 42 is provided with two inclined surfaces 44 which are oppositely arranged, and the two bent portions 7 of each group of pin assemblies 3 are in shape fit and fit connection with the two inclined surfaces 44 of the corresponding tab protruding portion 43, so that after the pin assemblies 3 are connected with the tabs 4, the contact surface is increased and the connection is more stable by being connected with the inner sides of the bent portions 7 through the inclined surfaces 44, and the efficiency of the battery cell is increased.
Example 3
A battery module comprises a battery cell described in an embodiment 2, wherein a full-lug cover plate is arranged on the battery cell of the battery module, a pole post 2 and a pin assembly 3 are integrated, the pin assembly 3 is of a double-strip pin structure, the structural strength of the battery module is improved, a cylindrical protruding structure 6 is arranged at the pin assembly 3, the overcurrent area can be effectively increased when the battery cell works, and the power performance of the battery cell is improved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (11)
1. The utility model provides a full utmost point ear apron, its characterized in that, includes apron component (1), apron component (1) upper end both sides are equipped with utmost point post (2), apron component (1) lower extreme is equipped with two pin assembly (3), two pin assembly (3) respectively with two utmost point post (2) set up relatively, every group pin assembly (3) include two first pins (33) and second pins (34) of setting relatively, form clamping chamber (8) that are used for centre gripping utmost point ear (4) between first pin (33) and second pins (34).
2. A full tab cover according to claim 1, wherein the faces of the lead assemblies (3) of the same set are provided with a plurality of raised formations (6).
3. A full tab cover according to claim 2, wherein the raised structures (6) are located on the inside surface of the lead assembly (3) and are uniformly arranged, the raised structures (6) being arranged in two columns and rows on the lead assembly (3).
4. A full tab cover according to claim 2, wherein each of the raised structures (6) is of the same shape and size and has a height of 1-5mm.
5. A full tab cover according to claim 1, wherein each set of two of said lead assemblies (3) are identical in size and length and are arranged in parallel.
6. A full tab cover according to any one of claims 1-5, wherein each set of two lead assemblies (3) has a bent portion (7) at one end adjacent to the cover member (1), and the two bent portions (7) are disposed opposite each other, and the pitch of the bent portions (7) is greater than the pitch of the two oppositely disposed lead assemblies (3).
7. A full tab cover according to claim 6, wherein each set of said pin assemblies (3) corresponds to said pole (2) as an integrally formed structural member.
8. An electric core, characterized in that the electric core comprises the full-tab cover plate as claimed in any one of claims 1-7, and the two groups of pin assemblies (3) of the cover plate member (1) are respectively clamped and connected with a positive electrode tab (41) and a negative electrode tab (42) of the winding core (5).
9. The battery cell according to claim 8, wherein tab protruding portions (43) are respectively arranged at the upper end and the lower end of the positive electrode tab (41) and the negative electrode tab (42), the thickness of each tab protruding portion (43) is larger than the middle portion between the two tab protruding portions (43), each group of two pin assemblies (3) is clamped and connected with the middle portion corresponding to the positive electrode tab (41) and the negative electrode tab (42), the tab protruding portions (43) arranged at the upper ends of the positive electrode tab (41) or the negative electrode tab (42) are arranged at the bending portions (7) of the two pin assemblies (3), and the tab protruding portions (43) arranged at the lower ends of the positive electrode tab (41) or the negative electrode tab (42) are arranged at the outer sides of the lower end portions of the two pin assemblies (3).
10. A cell according to claim 9, wherein the tab protruding parts (43) located at the upper ends of the positive electrode tab (41) and the negative electrode tab (42) are provided with two inclined surfaces (44) which are oppositely arranged, and the two bent parts (7) of each group of the pin assemblies (3) are in shape fit and fit connection with the two inclined surfaces (44) corresponding to the tab protruding parts (43).
11. A battery module comprising a cell according to any one of claims 8-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223416994.4U CN219419235U (en) | 2022-12-20 | 2022-12-20 | Full-tab cover plate, battery cell and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223416994.4U CN219419235U (en) | 2022-12-20 | 2022-12-20 | Full-tab cover plate, battery cell and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219419235U true CN219419235U (en) | 2023-07-25 |
Family
ID=87227803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223416994.4U Active CN219419235U (en) | 2022-12-20 | 2022-12-20 | Full-tab cover plate, battery cell and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219419235U (en) |
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2022
- 2022-12-20 CN CN202223416994.4U patent/CN219419235U/en active Active
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