CN211350865U - Lithium ion battery, battery module and battery pack - Google Patents
Lithium ion battery, battery module and battery pack Download PDFInfo
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- CN211350865U CN211350865U CN202020452352.1U CN202020452352U CN211350865U CN 211350865 U CN211350865 U CN 211350865U CN 202020452352 U CN202020452352 U CN 202020452352U CN 211350865 U CN211350865 U CN 211350865U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model relates to a battery technology field provides a lithium ion battery, battery module and battery package. Lithium ion battery includes the casing and sets up the inside electric core group of casing, electric core group is including following a plurality of electric cores that lithium ion battery length direction parallel set up, electric core all has anodal utmost point ear and negative pole utmost point ear, adjacent two link to each other through the connection piece between the anodal utmost point ear of electric core and the negative pole utmost point ear, be equipped with anodal utmost point post and negative pole post on the casing, the connection piece that the electric core of the edge battery length direction's both ends of electric core group is connected links to each other with anodal utmost point post and negative pole post respectively. The lithium ion battery of the utility model can reduce the thickness of the single battery, increase the specific surface area of the battery, is beneficial to the heat dissipation of the battery module at the later stage, and improves the service life of the battery module; meanwhile, on the basis of meeting the requirements of the capacity and the voltage of the battery pack, the use of later-stage battery module connecting pieces is reduced, and the specific energy of the single battery is improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to lithium ion battery, battery module and battery package.
Background
With the continuous popularization of new energy automobiles, the performance requirements on lithium ion batteries as core parts of electric automobiles are higher and higher. The endurance mileage of the battery pack depends on the specific energy of the battery pack and the charge-discharge efficiency of the whole system.
At present, the inside electric core structure of monomer lithium ion battery generally adopts single naked electric core or two above naked electric cores to form parallelly connected in electric core thickness direction, but along with the increase of battery thickness, has not only increased utmost point ear welding degree of difficulty, still is unfavorable for the heat dissipation in the battery later stage use, adopts parallelly connected structure can't improve whole monomer lithium ion battery's voltage simultaneously. Therefore, before being applied to a new energy automobile as a power source, a plurality of single lithium ion batteries are required to be combined into a power lithium ion battery pack in a series-parallel connection mode, the single lithium ion batteries are connected through an external connecting piece, so that the installation structure of the battery pack is increased, the production and manufacturing cost is increased, the mass specific energy and the volume specific energy of the battery pack are reduced, in addition, the increase of the connecting piece can also increase the internal resistance of the battery, the heat productivity of the battery in the use process is increased, the charge and discharge efficiency of the whole system is also influenced, and the endurance mileage of the battery pack is finally influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a lithium ion battery, a battery module and a battery pack that reduce the thickness of a single battery, increase the specific surface area of the battery and improve the specific energy of the single battery.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the utility model provides a lithium ion battery, lithium ion battery includes the casing and sets up the inside electric core group of casing, electric core group includes the edge a plurality of electric cores that lithium ion battery length direction set up in parallel, electric core all has anodal utmost point ear and negative pole utmost point ear, adjacent two link to each other through the connection piece between the anodal utmost point ear of electric core and the negative pole utmost point ear, be equipped with anodal utmost point post and negative pole post on the casing, the edge of electric core group the connection piece that the electric core at lithium ion battery length direction's both ends is connected respectively with anodal utmost point post with negative pole post links to each other.
Optionally, a positive electrode tab and a negative electrode tab of two adjacent battery cells connected to the same connecting sheet are located on the same side of the two battery cells; and/or
The battery cell group comprises at least one row of battery cells arranged in parallel along the length direction of the lithium ion battery.
Optionally, the positive electrode tab and the negative electrode tab of the plurality of battery cells are both located on the same side of the battery cells.
Optionally, the lithium ion battery includes a plurality of connection pieces connecting a plurality of battery cells, and the plurality of connection pieces are arranged at intervals along a length direction of the lithium ion battery.
Optionally, the casing includes hollow shell and sets up positive cover plate and negative cover plate at shell both ends, anodal utmost point post sets up on the positive cover plate, negative pole post sets up on the negative cover plate.
Optionally, the positive electrode tab and the negative electrode tab are fixed by a holder located on a side portion of the battery cell, and the holder is disposed inside the casing.
Optionally, a partition board is arranged between the adjacent electric cores, and a pore is arranged on the partition board.
Optionally, both ends of the partition plate are respectively connected to the holder and the housing.
The utility model discloses the second aspect provides a battery module, including above-mentioned arbitrary scheme lithium ion battery.
The utility model discloses the third aspect provides a battery package, including above-mentioned scheme battery module.
Compared with the prior art, the lithium ion battery has the following advantages:
the lithium ion battery of the utility model arranges a plurality of battery cores in parallel along the length direction of the battery, and realizes the series connection among the plurality of battery cores by utilizing the connecting sheet, thereby reducing the thickness of the single battery, increasing the specific surface area of the battery, being beneficial to the heat dissipation of a later-stage battery module and improving the service life of the battery module; simultaneously, can also improve monomer lithium ion battery's voltage through the mode of establishing ties electric core, and then on satisfying battery package capacity and voltage requirement's basis, reduce the use of later stage battery module connecting piece, improve monomer battery specific energy, reduce the battery internal resistance, further reduce calorific capacity in the battery use, promote the charge-discharge efficiency of system, prolong the continuation of the journey mileage of battery.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of a lithium ion battery according to an embodiment of the present invention.
Description of reference numerals:
the device comprises a shell 1, a positive cover plate 2, a negative cover plate 3, an electric core 4, an electric core 5, an electric core group 6, an explosion-proof valve 7, a positive pole column 8, a negative pole column 9, a liquid injection hole 10, a positive pole lug 11, a negative pole lug 12, a partition plate 13, a retainer and a connecting sheet 14.
Detailed Description
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.
Combine fig. 1, according to the utility model discloses an aspect, provides a lithium ion battery, lithium ion battery includes casing 1 and sets up casing 1 inside electric core group 5, electric core group 5 includes the edge a plurality of electric cores 4 that lithium ion battery length direction set up side by side, electric core 4 all has anodal utmost point ear 10 and negative pole utmost point ear 11, adjacent two link to each other through connection piece 14 between the anodal utmost point ear 10 of electric core 4 and the negative pole utmost point ear 11, be equipped with anodal utmost point post 7 and negative pole post 8 on the casing 1, electric core group 5's edge connection piece 14 that electric core 4 at lithium ion battery length direction's both ends connected respectively with anodal utmost point post 7 with negative pole post 8 links to each other.
The utility model discloses a lithium ion battery sets up a plurality of electric cores 4 side by side along battery length direction to utilize connection piece 14 to realize the series connection between a plurality of electric cores 4, therefore lithium ion battery's thickness is the height of single electric core 4 promptly, for the mode of establishing electric core along electric core thickness direction (being direction of height) in traditional lithium ion battery, can reduce monomer battery thickness, increase battery specific surface area, do benefit to later stage battery module heat dissipation, improve battery module life; simultaneously, can also improve monomer lithium ion battery's voltage through the mode of establishing ties electric core, particularly, when needs further improve voltage, only need prolong lithium ion battery's length, along battery length direction add electric core 4 promptly can, and then on the basis that satisfies battery package capacity and voltage requirement, reduce the use of later stage battery module connecting piece easily, improve monomer battery specific energy, reduce the battery internal resistance, further reduce calorific capacity in the battery use, the charge-discharge efficiency of lift system, the continuation of the journey mileage of extension battery.
In addition, in the arrangement process of the battery cells 1, the length direction of a single battery cell 1 is set to be perpendicular to the length direction of the lithium ion battery, so as to meet the requirement that a plurality of battery cells 1 are arranged in parallel along the length direction of the lithium ion battery. Adjacent two link to each other through connection piece 14 between the anodal utmost point ear 10 of electric core 4 and the negative pole utmost point ear 11, and lie in electric core group 5 and follow the one end of the connection piece 14 of the electric core 4 at lithium ion battery length direction's both ends then links to each other with anodal utmost point ear 10 and the negative pole utmost point ear 11 of both ends electric core 4 respectively, and the other end of two connection pieces 14, the free end links to each other with anodal utmost point post 7 and negative pole post 8 respectively promptly to accomplish the series connection of electric core 4 in the lithium ion battery.
In order to facilitate the connection of the connecting sheet 14 to the tabs and avoid the phenomena of torsion and the like of the connecting sheet 14 in the connection process, the positive tab 10 and the negative tab 11 of two adjacent battery cells 4 connected to the same connecting sheet 14 are positioned at the same side of the two battery cells 4, so that the connection convenience of a single connecting sheet 14 is ensured, and the single connecting sheet 14 can be placed along the plane positioned at one side of the battery cells 4 in the connection process. Wherein, the connecting sheet 14 is a metal connecting sheet.
In this embodiment, in order to save occupation space among the 4 assembly connection processes of electric core in furthest, the arrangement of the connection piece 14 of being convenient for is a plurality of the anodal utmost point ear 10 and the negative pole utmost point ear 11 of electric core 4 all are located the homonymy of electric core 4, from this, in the assembly process, only need in casing 1 electric core 4 utmost point ear side reserve the space of connection piece 14 can, effectively reduce whole occupation space. It can be understood that, when a plurality of battery cells 4 are connected in series, the lithium ion battery includes a plurality of connecting pieces 14 for connecting a plurality of battery cells 4, and further, when a plurality of positive electrode tabs 10 and negative electrode tabs 11 of the battery cells 4 are both located on the same side of the battery cells 4, the plurality of connecting pieces 14 are arranged at intervals along the length direction of the lithium ion battery, that is, the plurality of connecting pieces 14 can be approximately located on the same extension line on the same side of the battery cells 4.
It should be noted that the casing 1 includes a hollow casing, and a positive electrode cover plate 2 and a negative electrode cover plate 3 disposed at two ends of the casing, the positive electrode post 7 is disposed on the positive electrode cover plate 2, and the negative electrode post 8 is disposed on the negative electrode cover plate 3, where the casing 1 is generally a metal casing. Through setting up a plurality of electric cores 4 along lithium ion battery length direction side by side for positive pole apron 2 and negative pole apron 3 can be shared to a plurality of electric cores 4, from this on the basis of increase battery capacity, reach the purpose that subtracts heavy, increase energy density, improve the specific energy of battery cell. In addition, in order to improve the safety of the battery in the using process, the positive electrode cover plate 2 and the negative electrode cover plate 3 are both provided with an explosion-proof valve 6. In order to fill the lithium ion battery, one of the positive electrode lid plate 2 and the negative electrode lid plate 3 is provided with a liquid filling hole 9, and in the present embodiment, the liquid filling hole 9 is provided in the negative electrode lid plate 3.
In order to protect the tab, avoid tab contact casing 1, anodal tab 10 with negative pole tab 11 is respectively through being located the holder 13 of 4 lateral parts of electric core is fixed, holder 13 sets up 1 inside 4 utmost point ear sides of electric core that are located of casing, specifically, can be equipped with the hole that supplies the tab to draw forth on the holder 13 to realize fixed effect to the utmost point ear.
In addition, a partition plate 12 is arranged between adjacent electric cores 4, so that the electric cores are protected, and in order to dissipate heat of the electric cores 4, a pore is formed in the partition plate 12. Meanwhile, it is worth noting that two ends of the partition board 12 are respectively connected to the holder 13 and the housing 1, specifically, two ends of the partition board 12 can be clamped on the holder 13 and the housing 1 so as to position the partition board 12, and meanwhile, the holder 13 can also fix the connecting piece 14.
Of course, the battery cell group 5 includes at least one row of the battery cells 4 arranged in parallel along the length direction of the lithium ion battery. In this embodiment, the electric core group 5 includes one row of electric core 4, in some other embodiments, when the length that single row electric core 4 can prolong reaches the limit, when 4 quantity of electric core that parallel reached the limit promptly, can also improve battery capacity and voltage through addding row number, and when electric core group 5 includes two rows and more than two rows of electric core 4, every row of electric core 4 adopts aforementioned arrangement and connected mode equally, in the assembling process, with the connection piece 14 welded fastening of multirow electric core 4 both ends together, the rethread links to each other with anodal utmost point post 7 and negative pole post 8 respectively.
In the process of assembling the lithium ion battery, firstly, a positive electrode tab 10 and a negative electrode tab 11 of each battery cell 4 are respectively pre-welded, and the tabs are in a multilayer structure, so that subsequent welding combination is facilitated after pre-welding; then arranging a plurality of battery cores 4 in parallel, and connecting the plurality of battery cores 4 in series through a plurality of connecting pieces 14 to form a battery core group 5; next, a partition plate 12 is arranged between two adjacent electric cores 4, a retainer 13 is arranged on the side of a positive electrode tab 10 and a negative electrode tab 11 of the electric core group 5, and two ends of the partition plate 12 are clamped with the retainer 13 and the shell 1; then, the battery cell group 5 extends into the shell from one end of the hollow shell, the free ends of the connecting sheets 14 of the battery cells 4 positioned at the two ends are respectively welded with the positive pole post 7 and the negative pole post 8, and the two ends of the hollow shell are respectively welded and sealed through the positive pole cover plate 2 and the negative pole cover plate 3; and finally, injecting liquid from a liquid injection hole 9 formed in the cover plate on one side and sealing to complete the assembly of the lithium ion battery.
The utility model discloses the second aspect provides a battery module, including above-mentioned arbitrary scheme lithium ion battery. The battery module is provided with the lithium ion battery, so that the battery module has all the advantages of the lithium ion battery. Increase battery capacity through increasing series connection electricity core 4 quantity at lithium ion battery length direction, make its requirement that easily satisfies battery voltage, and then can reduce the use of connecting piece in the battery module, reduce the internal resistance, further reduce generating heat in the module use, improve the module security.
The utility model discloses the third aspect provides a battery package, including above-mentioned scheme battery module. The utility model discloses a battery package is through adopting above-mentioned lithium ion battery, can improve battery cell specific energy, reduces the battery internal resistance, reduces calorific capacity in the battery use, effectively improves charge-discharge efficiency, and then prolongs the continuation of the journey mileage of battery package.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a lithium ion battery, its characterized in that, lithium ion battery includes casing (1) and sets up casing (1) inside electric core group (5), electric core group (5) are including following a plurality of electric core (4) that lithium ion battery length direction set up in parallel, electric core (4) all have anodal utmost point ear (10) and negative pole utmost point ear (11), adjacent two link to each other through connection piece (14) between anodal utmost point ear (10) of electric core (4) and negative pole utmost point ear (11), be equipped with anodal utmost point post (7) and negative pole utmost point post (8) on casing (1), the edge of electric core group (5) connection piece (14) that electric core (4) at lithium ion battery length direction's both ends are connected respectively with anodal utmost point post (7) with negative pole post (8) link to each other.
2. The lithium ion battery according to claim 1, characterized in that the positive electrode tab (10) and the negative electrode tab (11) of two adjacent cells (4) connected to the same connecting sheet (14) are positioned on the same side of the two cells (4); and/or
The battery cell group (5) comprises at least one row of battery cells (4) which are arranged in parallel along the length direction of the lithium ion battery.
3. The lithium ion battery according to claim 1, characterized in that the positive electrode tab (10) and the negative electrode tab (11) of a plurality of the cells (4) are both located on the same side of the cells (4).
4. The lithium ion battery according to claim 3, characterized in that the lithium ion battery comprises a plurality of connecting sheets (14) for connecting a plurality of battery cells (4), and the plurality of connecting sheets (14) are arranged at intervals along the length direction of the lithium ion battery.
5. The lithium ion battery according to claim 1, wherein the housing (1) comprises a hollow shell, and a positive electrode cover plate (2) and a negative electrode cover plate (3) arranged at two ends of the shell, the positive electrode post (7) is arranged on the positive electrode cover plate (2), and the negative electrode post (8) is arranged on the negative electrode cover plate (3).
6. The lithium ion battery according to claim 1, characterized in that the positive electrode tab (10) and the negative electrode tab (11) are each fixed by a holder (13) on the side of the cell (4), the holder (13) being arranged inside the housing (1).
7. The lithium ion battery according to claim 6, characterized in that a separator (12) is arranged between adjacent battery cells (4), and pores are arranged on the separator (12).
8. Lithium ion battery according to claim 7, characterized in that the separator (12) is connected at both ends to the holder (13) and the housing (1), respectively.
9. A battery module comprising the lithium ion battery according to any one of claims 1 to 8.
10. A battery pack comprising the battery module according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020452352.1U CN211350865U (en) | 2020-03-31 | 2020-03-31 | Lithium ion battery, battery module and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020452352.1U CN211350865U (en) | 2020-03-31 | 2020-03-31 | Lithium ion battery, battery module and battery pack |
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| CN211350865U true CN211350865U (en) | 2020-08-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271374A (en) * | 2020-11-12 | 2021-01-26 | 浙江南都电源动力股份有限公司 | Multi-cell integrated lithium battery and manufacturing process thereof |
| CN113921966A (en) * | 2021-09-30 | 2022-01-11 | 宁德新能源科技有限公司 | Battery and electronic device |
| CN114024082A (en) * | 2021-11-04 | 2022-02-08 | 欣旺达电动汽车电池有限公司 | Battery, battery module and battery pack |
| CN114079107A (en) * | 2021-11-18 | 2022-02-22 | 广州小鹏汽车科技有限公司 | Battery module and battery pack |
| CN116670876A (en) * | 2021-11-18 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Battery cell, manufacturing method and manufacturing equipment thereof, battery and power utilization device |
| WO2023216512A1 (en) * | 2022-05-10 | 2023-11-16 | 蔚来电池科技(安徽)有限公司 | Battery |
-
2020
- 2020-03-31 CN CN202020452352.1U patent/CN211350865U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271374A (en) * | 2020-11-12 | 2021-01-26 | 浙江南都电源动力股份有限公司 | Multi-cell integrated lithium battery and manufacturing process thereof |
| CN113921966A (en) * | 2021-09-30 | 2022-01-11 | 宁德新能源科技有限公司 | Battery and electronic device |
| CN114024082A (en) * | 2021-11-04 | 2022-02-08 | 欣旺达电动汽车电池有限公司 | Battery, battery module and battery pack |
| CN114024082B (en) * | 2021-11-04 | 2024-04-30 | 欣旺达动力科技股份有限公司 | Battery, battery module and battery pack |
| CN114079107A (en) * | 2021-11-18 | 2022-02-22 | 广州小鹏汽车科技有限公司 | Battery module and battery pack |
| CN116670876A (en) * | 2021-11-18 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Battery cell, manufacturing method and manufacturing equipment thereof, battery and power utilization device |
| WO2023216512A1 (en) * | 2022-05-10 | 2023-11-16 | 蔚来电池科技(安徽)有限公司 | Battery |
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