CN213989125U - Lithium ion battery structure - Google Patents
Lithium ion battery structure Download PDFInfo
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- CN213989125U CN213989125U CN202023110479.4U CN202023110479U CN213989125U CN 213989125 U CN213989125 U CN 213989125U CN 202023110479 U CN202023110479 U CN 202023110479U CN 213989125 U CN213989125 U CN 213989125U
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- negative pole
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- lithium ion
- battery structure
- ion battery
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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 lithium ion battery structure, including casing, electric core and top cap, inside the casing was located to the electric core, the top cap welds in the casing top, be equipped with anodal ear and negative pole ear on the electric core, anodal ear is full utmost point ear, anodal ear and negative pole ear are located respectively the upper and lower both sides of electric core, be equipped with the negative pole post on the top cap, the negative pole ear pass through the negative pole connection piece with the negative pole post links to each other, anodal ear pass through the anodal connection piece with the casing bottom links to each other. The battery structure has the advantages that the battery core short circuit possibly caused by the fact that the positive electrode lug and the negative electrode lug are located on the same side of the battery core is avoided by separately locating the positive electrode lug and the negative electrode lug of the battery core on the two sides of the battery core, the top cover adopts a single-pole post structure to reduce the difficulty in designing and manufacturing the top cover and welding the poles, the positive electrode lug is connected with the bottom of the shell through the positive connecting piece to reduce the process of die-cutting pole pieces of the battery core, the positive pole is reduced, the cost is reduced, and the battery structure is also beneficial to increasing the energy density of a battery.
Description
Technical Field
The utility model relates to a lithium cell technical field, concretely relates to lithium ion battery structure.
Background
The lithium battery has the advantages of high energy density, high capacity, small volume and the like, and is a novel cleaning battery which is widely applied at present. The square lithium battery design is widely applied to the aspects of base station energy storage and electric automobile power batteries, the square lithium battery which is most widely used at present is generally designed into a top cover bipolar column structure, specifically, a positive pole column and a negative pole column are designed on a top cover, a positive pole ear and a negative pole ear are designed on the upper side of a battery core, the positive pole ear and the negative pole ear of the battery core are correspondingly welded with the positive pole column and the negative pole column on the top cover during assembly, and then the top cover is welded with a battery shell. Because the positive and negative electrode lugs of the battery core are positioned on the upper side of the battery core, a reserved safe area for avoiding contact short circuit is large, the occupancy rate of the battery space is large, and meanwhile, the requirements of the top cover on top cover design and welding process are higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at: the lithium ion battery structure is provided aiming at the defects of a square lithium battery in the prior art that a top cover bipolar post structure is adopted, positive and negative lugs of an electric core are respectively arranged on two sides of the electric core, and meanwhile, the top cover adopts a single-post structure, so that the occurrence of contact short circuit can be avoided, the occupation of the internal space of the battery is reduced, and the design and manufacture of the top cover and the difficulty of post welding can be reduced.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a lithium ion battery structure, includes casing, electric core and top cap, inside the casing was located to electric core, the top cap welds in the casing top, be equipped with anodal ear and negative pole ear on the electric core, anodal ear is full utmost point ear, anodal ear and negative pole ear are located respectively the upper and lower both sides of electric core, be equipped with the negative pole post on the top cap, the negative pole ear pass through the negative pole connection piece with the negative pole post links to each other, anodal ear pass through the anodal connection piece with the casing bottom links to each other.
The utility model discloses a separate the both sides of locating electric core with positive negative pole ear in electric core, the electric core short circuit that positive negative pole ear is located electric core homonymy and probably arouses has been avoided, the top cap adopts monopole post structure, can reduce top cap design preparation and utmost point post welded degree of difficulty, anodal ear is full utmost point ear and is connected bottom the casing through positive connection piece, can reduce electric core cross cutting pole piece technology, the anodal post has been reduced, the cost is reduced, this battery structure can also reduce electric core welding process electricity core inner space and possess, can increase battery energy density, be favorable to realizing the direct mode of establishing ties parallelly connected of electric core simultaneously, increase module space utilization.
As the utility model discloses a preferred scheme, the top cap downside is equipped with down the plastic part, the negative pole post runs through the top cap with the plastic part down. Through setting up down the plastic part, can realize the isolation and the insulating requirement of top cap downside and electric core.
As the utility model discloses a preferred scheme, the top cap with be equipped with plastic part between the negative pole post, go up plastic part parcel the side of negative pole post. Through setting up the plastic part, can realize that the installation of negative pole post on the top cap is fixed to and the isolation and the insulation between negative pole post and the top cap require.
As the preferred scheme of the utility model, go up the plastic part with be equipped with the viscose layer between the top cap. Through setting up the viscose layer, can fix the plastic part bonding on the top cap.
As the utility model discloses a preferred scheme, the side of negative pole post is equipped with the anchor board, the embedding of anchor board go up inside the plastic part to increase the power of being connected of negative pole post and last plastic part.
As the utility model discloses an optimal scheme, evenly be provided with a plurality of anchor hole on the anchor board for it is downthehole that the anchor can be embedded into to go up the plastic part, further increases the power of being connected of negative pole post and last plastic part.
As the utility model discloses a preferred scheme, the negative pole post is copper aluminium composite post, the one end that is close to electric core on the negative pole post is the copper end, the other end of negative pole post is aluminium matter end. The cathode post adopts a copper-aluminum composite post, which not only can meet the requirement of the cathode post on electrochemical reaction resistance, but also can reduce the weight and the cost of the cathode post.
As the preferred scheme of the utility model, the negative pole connection piece is the copper material, the positive pole connection piece is the aluminium material.
As the utility model discloses an optimized scheme, still be equipped with explosion-proof valve and annotate the liquid hole on the top cap, explosion-proof valve top is equipped with the protection film, annotate the downthehole sealed nail that is equipped with of liquid.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
the utility model discloses a separate the both sides of locating electric core with positive negative pole ear in electric core, the electric core short circuit that positive negative pole ear is located electric core homonymy and probably arouses has been avoided, the top cap adopts monopole post structure, can reduce top cap design preparation and utmost point post welded degree of difficulty, anodal ear is full utmost point ear and is connected bottom the casing through positive connection piece, can reduce electric core cross cutting pole piece technology, the anodal post has been reduced, the cost is reduced, this battery structure can also reduce electric core welding process electricity core inner space and possess, can increase battery energy density, be favorable to realizing the direct mode of establishing ties parallelly connected of electric core simultaneously, increase module space utilization.
Drawings
Fig. 1 is a schematic diagram of a lithium ion battery according to the present invention.
Fig. 2 is an enlarged view of the negative post in fig. 1.
Fig. 3 is an enlarged view of the explosion proof valve of fig. 1 at the position of the valve.
Fig. 4 is an enlarged view of the position of the injection hole in fig. 1.
Fig. 5 is an enlarged view of the junction of the positive tab and the bottom of the housing in fig. 1.
Fig. 6 is a perspective view of a battery cell of the present invention.
Fig. 7 is a schematic view of fig. 6 after being turned upside down.
Fig. 8 is a perspective view of the negative electrode post according to the present invention.
The labels in the figure are: 1-shell, 2-battery cell, 21-positive tab, 22-negative tab, 3-top cover, 4-negative pole column, 41-copper end, 42-aluminum end, 43-upper plastic piece, 44-adhesive layer, 45-anchoring plate, 46-anchoring hole, 5-negative pole connecting piece, 6-positive pole connecting piece, 7-lower plastic piece, 8-explosion-proof valve, 81-protective film, 9-liquid injection hole and 91-sealing nail.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Examples
As shown in fig. 1 to 8, the lithium ion battery structure in this embodiment includes a casing 1, a battery cell 2, and a top cap 3, the battery cell 2 is disposed inside the casing 1, the top cap 3 is welded on the top of the casing 1, a positive tab 21 and a negative tab 22 are disposed on the battery cell 2, the positive tab 21 is a full tab, the positive tab 21 and the negative tab 22 are respectively disposed on the upper and lower sides of the battery cell 2, the negative tab 22 is disposed on the upper side of the battery cell 2, the positive tab 21 is disposed on the lower side of the battery cell 2, a negative pole post 4 is disposed on the top cap 3, the negative tab 22 is connected to the negative pole post 4 through a negative pole connecting piece 5, and the positive tab 21 is connected to the bottom of the casing 1 through a positive pole connecting piece 6.
The utility model discloses a separate the both sides of locating electric core with positive negative pole ear in electric core, the electric core short circuit that positive negative pole ear is located electric core homonymy and probably arouses has been avoided, the top cap adopts monopole post structure, can reduce top cap design preparation and utmost point post welded degree of difficulty, anodal ear is full utmost point ear and is connected bottom the casing through positive connection piece, can reduce electric core cross cutting pole piece technology, the anodal post has been reduced, the cost is reduced, this battery structure can also reduce electric core welding process electricity core inner space and possess, can increase battery energy density, be favorable to realizing the direct mode of establishing ties parallelly connected of electric core simultaneously, increase module space utilization.
In this embodiment, the battery cell 2 is wound symmetrically with the positive tab 21 and the negative tab 22 during the winding process, where the positive tab 21 is located at the lower side of the battery cell 2, and the negative tab 22 is located at the upper side of the battery cell 2; the positive lug 21 is a full lug, and after the positive lug 21 is welded with the positive connecting sheet 6, the positive connecting sheet 6 is welded with the bottom of the shell 1 through external penetration welding.
In this embodiment, the negative electrode post 4 is a copper-aluminum composite electrode post, the negative electrode post 4 is of a T-shaped structure, one end of the negative electrode post 4 close to the battery cell is a copper end 41, and the other end of the negative electrode post 4 is an aluminum end 42. The cathode post adopts a copper-aluminum composite post, which not only can meet the requirement of the cathode post on electrochemical reaction resistance, but also can reduce the weight and the cost of the cathode post. The negative connecting piece 5 is made of copper material, and the positive connecting piece 6 is made of aluminum material.
In this embodiment, the lower side surface of the top cover 3 is provided with a lower plastic part 7, and the negative pole column 4 penetrates through the top cover 3 and the lower plastic part 7. Through setting up down the plastic part, can realize the isolation and the insulating requirement of top cap downside and electric core.
In this embodiment, a plastic part 43 is disposed between the top cap 3 and the negative pole post 4, the plastic part 43 wraps the side surface of the negative pole post 4 and only exposes the top surface and the bottom surface of the negative pole post 4, and the plastic part 43 is installed in a sinking groove on the top cap 3. Through setting up the plastic part, can realize that the installation of negative pole post on the top cap is fixed to and the isolation and the insulation between negative pole post and the top cap require.
In this embodiment, an adhesive layer 44 is disposed between the upper plastic part 43 and the top cover 3, and specifically, the adhesive layer 44 is disposed between the upper plastic part 43 and the bottom contact surface of the sinking groove on the top cover 3. Through setting up the viscose layer, can fix the plastic part bonding on the top cap.
In this embodiment, the side surfaces of the periphery of the negative pole column 4 are provided with the anchoring plates 45, the anchoring plates 45 are located around the aluminum end 42 of the negative pole column 4, and the anchoring plates 45 are embedded in the upper plastic part 43, so that the connection force between the negative pole column and the upper plastic part is increased.
In this embodiment, a plurality of anchoring holes 46 are uniformly formed in the anchoring plate 45, so that the upper plastic part 43 can be embedded into the anchoring holes 46, and the connection force between the negative pole and the upper plastic part is further increased.
In this embodiment, still be equipped with explosion-proof valve 8 and annotate liquid hole 9 on the top cap 3, explosion-proof valve 8 is used for opening the pressure release automatically when electric core internal pressure is too big to prevent the condition of explosion, annotate liquid hole 9 and be used for annotating electrolyte into the battery case. And the lower insulating part 7 is provided with an explosion-proof through hole corresponding to the explosion-proof valve 8 and a liquid injection through hole corresponding to the liquid injection hole 9. The explosion-proof through hole is used for gas to see through insulating part down to guarantee the normal of top cap explosion-proof valve and open, and annotate the liquid through hole and be used for annotating liquid hole from the top cap and pour into electrolyte into in the battery. Explosion-proof valve 8 top is equipped with protection film 81, protection film 81 is pasted and is used for protecting explosion-proof valve 8 on top cap 3, annotate the downthehole sealed nail 91 that is equipped with of liquid 9, sealed nail 91 welding is used for annotating the interior shutoff of liquid hole 9 and is sealed annotating liquid hole 9 after the liquid is ended.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the principles of the present invention should be included within the scope of the present invention.
Claims (9)
1. The utility model provides a lithium ion battery structure, its characterized in that, includes casing, electric core and top cap, inside the casing was located to electric core, the top cap welds in the casing top, be equipped with anodal ear and negative pole ear on the electric core, anodal ear is full utmost point ear, anodal ear and negative pole ear are located respectively the upper and lower both sides of electric core, be equipped with the negative pole post on the top cap, the negative pole ear pass through the negative pole connection piece with the negative pole post links to each other, anodal ear pass through the anodal connection piece with the casing bottom links to each other.
2. The lithium ion battery structure of claim 1, wherein the lower side of the top cover is provided with a lower plastic part, and the negative pole posts penetrate through the top cover and the lower plastic part.
3. The lithium ion battery structure of claim 2, wherein an upper plastic part is arranged between the top cover and the negative pole posts, and the upper plastic part wraps the side faces of the negative pole posts.
4. The lithium ion battery structure of claim 3, wherein an adhesive layer is disposed between the upper plastic part and the top cover.
5. The lithium ion battery structure of claim 4, wherein the side surface of the negative pole is provided with an anchoring plate, and the anchoring plate is embedded in the upper plastic part.
6. The lithium ion battery structure of claim 5, wherein a plurality of anchoring holes are uniformly arranged on the anchoring plate.
7. The lithium ion battery structure of any one of claims 1-6, wherein the negative electrode pillar is a copper-aluminum composite electrode pillar, one end of the negative electrode pillar near the battery cell is a copper end, and the other end of the negative electrode pillar is an aluminum end.
8. The lithium ion battery structure of any one of claims 1-6, wherein the negative connection tab is a copper material and the positive connection tab is an aluminum material.
9. The lithium ion battery structure of any one of claims 1 to 6, wherein the top cover is further provided with an explosion-proof valve and a liquid injection hole, a protective film is arranged above the explosion-proof valve, and a sealing nail is arranged in the liquid injection hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023110479.4U CN213989125U (en) | 2020-12-22 | 2020-12-22 | Lithium ion battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023110479.4U CN213989125U (en) | 2020-12-22 | 2020-12-22 | Lithium ion battery structure |
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| CN213989125U true CN213989125U (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023110479.4U Active CN213989125U (en) | 2020-12-22 | 2020-12-22 | Lithium ion battery structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531295A (en) * | 2020-12-22 | 2021-03-19 | 厦门海辰新能源科技有限公司 | Lithium ion battery structure and tab electric connection method |
| CN113594640A (en) * | 2021-10-08 | 2021-11-02 | 深圳市聚和源科技有限公司 | Covering assembly, covering assembly processing method and battery |
| WO2023056664A1 (en) * | 2021-10-08 | 2023-04-13 | 深圳市聚和源科技有限公司 | Covering assembly and battery |
-
2020
- 2020-12-22 CN CN202023110479.4U patent/CN213989125U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531295A (en) * | 2020-12-22 | 2021-03-19 | 厦门海辰新能源科技有限公司 | Lithium ion battery structure and tab electric connection method |
| CN113594640A (en) * | 2021-10-08 | 2021-11-02 | 深圳市聚和源科技有限公司 | Covering assembly, covering assembly processing method and battery |
| WO2023056664A1 (en) * | 2021-10-08 | 2023-04-13 | 深圳市聚和源科技有限公司 | Covering assembly and battery |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 361000 201-1, complex building 5, No. 11, Butang Middle Road, torch high tech Zone (Tongxiang) industrial base, Xiamen, Fujian Patentee after: Xiamen Haichen Energy Storage Technology Co.,Ltd. Address before: 361000 201-1, complex building 5, No. 11, Butang Middle Road, torch high tech Zone (Tongxiang) industrial base, Xiamen, Fujian Patentee before: Xiamen Haichen New Energy Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |