CN213093247U - Multi-terminal single battery and power battery pack - Google Patents
Multi-terminal single battery and power battery pack Download PDFInfo
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- CN213093247U CN213093247U CN202022055531.4U CN202022055531U CN213093247U CN 213093247 U CN213093247 U CN 213093247U CN 202022055531 U CN202022055531 U CN 202022055531U CN 213093247 U CN213093247 U CN 213093247U
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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 discloses a multi-terminal battery cell and power battery package belongs to the technical field of lithium cell. The method comprises the following steps: the battery comprises a single battery body, a plurality of terminals arranged at the outer side surface of one cover plate and the same number of terminals arranged at the outer side surface of the other cover plate; the terminals adjacent to each other in the x and y directions show different positive and negative polarities. The utility model provides a plurality of positive terminals of battery cell, an original positive terminal is replaced in the design of a plurality of negative terminals, the design of a negative terminal, and form monomer electricity core series connection structure through connection modes such as terminal welding or bolt, thereby promote battery cell's voltage, make battery cell voltage promote to be present 2,3,4 … times, in limited electric motor car battery package space, can use battery cell still less to provide the required voltage of electric motor car, thereby can let battery cell do thicker, show and improve battery cell energy density, promote the dress electric quantity of electric motor car, improve the electric motor car continuation of the journey.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell, especially, relate to a multi-terminal battery cell and power battery package.
Background
The current square battery can improve the space utilization rate of the power battery pack due to the fact that the square battery is conveniently and integrally arranged in the power battery pack, so that the energy density of the power battery pack is improved, and the electric quantity of the electric vehicle is improved. But simultaneously because the voltage requirement of general electric motor car is more than 300V, and conventional battery cell's voltage is only 3-4.5V, so need to establish ties the stack to the battery cell in order to satisfy the demand of voltage, the demand of electric motor car high voltage leads to the quantity requirement of battery more, so in order to satisfy the battery quantity requirement, in limited battery package space, the battery cell can not do very thickly, and thickness seriously influences battery cell energy density, and then has restricted the promotion of electric motor car dress electric quantity.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the technical problem that exists among the above-mentioned background art, provide a plurality of positive terminals of battery cell, the design of a plurality of negative terminals replaces original positive terminal, the multi-terminal battery cell and the power battery package of a negative terminal.
The utility model discloses a following technical scheme realizes: a multi-terminal cell, comprising:
the battery comprises a battery body and a battery cover plate, wherein the battery body is provided with a shell with the length of L and the width of H, the cover plates are symmetrically connected to the left end and the right end of the shell, and a single battery sealing structure is formed between the shell and the cover plates;
further comprising: a plurality of terminals disposed on one of the cover plates, and the same number of terminals disposed on the other cover plate; the terminals adjacent to each other in the x and y directions show different positive and negative polarities.
In a further embodiment, two of the terminals are positive and negative electrodes of the battery body, and the other terminals are connected to the battery body in a welding or bolt manner, so that the battery body is internally provided with a series connection structure of bare cells.
In a further embodiment, when the number of terminals on each cover plate is two, the series connection of the formed naked electric cores is completed on the same cover plate; when the number of terminals on each cover plate is more than two, the series connection of the formed naked electric core is completed on different cover plates.
In a further embodiment, when the number of terminals provided on one of the cap plates is an even number, two terminals, which are positive and negative electrodes of the battery body, are located on the same cap plate.
In a further embodiment, when the number of terminals provided on one of the cap plates is an odd number, two terminals, which are positive and negative electrodes of the battery body, are respectively located on the two cap plates.
In a further embodiment, this internal naked electric core of battery adopts the reverse positive negative pole of adjacent naked electric core to place, is convenient for realize inside naked electric core and establishes ties.
A power battery pack, comprising: a plurality of battery cells as described above, the plurality of battery cells being disposed within the package.
In a further embodiment, the arrangement of the single batteries in the battery pack adopts the reverse arrangement of the adjacent single batteries, so that the electric connection of the positive and negative terminals of the adjacent single batteries is convenient to realize, and the connection structure is simplified.
The utility model has the advantages that: the utility model provides a plurality of positive terminals of single battery, the design of a plurality of negative terminals replaces original positive terminal, the design of a negative terminal, thereby promote battery cell's voltage, it is battery cell voltage promotion for present 2,3,4 … times, can use battery cell still less to provide the required voltage of electric motor car, thereby can let battery cell do thicker, show and improve battery cell energy density, promote the dress electric quantity of electric motor car, improve the continuation of the journey of electric motor car. Meanwhile, the single battery adopts a conventional multi-winding core structure, and the manufacturing difficulty of the single battery core is not increased. Meanwhile, the using number of the single batteries of the battery pack is reduced, and the manufacturing difficulty of the battery pack is obviously reduced.
Drawings
Fig. 1 is a schematic diagram of a structure of a middle battery cell according to the present invention.
Fig. 2 is a schematic diagram of the structure of the other end of the single battery of the present invention.
Fig. 3 is a schematic structural diagram of a single battery in the prior art.
Fig. 4 is a structure diagram of a bare cell inside a battery body in embodiment 1.
Fig. 5 is another bare cell structure diagram inside the battery body in embodiment 1.
Fig. 6 is a schematic structural diagram of a power battery pack in embodiment 1.
Fig. 7 is a side view of the connection arrangement of the positive and negative electrodes of the adjacent single batteries of the battery pack in example 1.
Fig. 8 is a side view of the positive and negative electrode connecting arrangement of the single unit cell of the battery pack in example 1.
Fig. 9 is a schematic diagram of a battery with two or more terminals.
Each of fig. 1 to 9 is labeled as: the battery comprises a battery body 1, a shell 2, a cover plate 3, a connecting piece 4, a terminal 5, a naked electric core 6, a bag body 7 and a power battery bag 8.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
The inventor finds out through research that: the current square battery can improve the space utilization rate of the power battery pack due to the fact that the square battery is conveniently and integrally arranged in the power battery pack, so that the energy density of the power battery pack is improved, and the electric quantity of the electric vehicle is improved. Meanwhile, the voltage requirement of a general electric vehicle is more than 300V, and the voltage of a conventional single battery is only 3-4.5V, so that the number requirement of the batteries is high, the single battery cannot be thick in a limited space, the energy density of the single battery is seriously influenced, and further the further improvement of the electric quantity of the electric vehicle is limited, as shown in fig. 3.
Therefore, the inventor makes the following improvements in order to solve the above technical problems: a plurality of positive terminals 5 and a plurality of negative terminals 5 of a single battery are provided to replace the original single battery with one positive terminal 5 and one negative terminal 5 and a power battery pack 8.
The battery body 1 comprises a shell 2 with the length of L, the width of H and the thickness of R and cover plates 3 symmetrically connected to the left end and the right end of the shell 2, and a single battery sealing structure is formed between the shell 2 and the cover plates 3. The utility model discloses mainly be to the improvement that square battery made, L > H > R promptly. The inside of seal structure is used for placing naked electric core 6.
The length direction of the case 2 is defined as the length direction of the battery body 1, the length direction of the case 2 is defined as the X direction, one of the cover plates 3 is provided with a plurality of terminals 5 or terminal terminals, and the other cover plate 3 is provided with the same number of terminals 5 or terminal terminals. The length direction of the lid plate 3 is the width direction of the battery body 1, defined as the Y direction in the present invention, and the polarity of the upper terminal 5 satisfies the following relationship: the terminals 5 adjacent to each other in the x, y direction show different positive and negative polarities from each other in the terminals 5. I.e. the polarities of the terminals 5 symmetrical to the adjacent terminals 5 or the two cover plates 3 are different, as shown in fig. 1. In the embodiment, the terminal 5 may be in various shapes such as a cylinder, a cube, a cuboid, etc., and the outer surface thereof may be provided with an external thread or a hollow structure, and an internal thread is provided in the hollow structure, so as to facilitate the connection relationship therebetween. The terminal 5 is a general term for a member connected to another conductor, and other expressions having the same function do not affect the right of this patent.
In a further embodiment, in order to enable the electrical connection relationship between the adjacent battery bodies 1, the two terminals 5 are positive and negative poles of the battery bodies 1. All the other terminals 5 keep the inside series structure that forms naked electric core 6 inside of battery body 1 through welding mode welded connection 4 on battery body 1, as shown in fig. 4 and fig. 5, this internal naked electric core of battery adopts the negative pole of adjacent naked electric core to place in reverse, is convenient for realize inside naked electric core and establishes ties. The welding method may adopt a common bus-bar welding or bolt connection method to form the assembled battery, and is not limited to the several connection methods described in this embodiment, which is shown in fig. 2.
Like fig. 4 and 5, constitute the series structure with a plurality of naked electric cores 6 of battery body 1 inside, directly increased battery body 1's whole voltage, according to the nature of establishing ties, improve battery body 1 voltage for single naked electric core 6 2,3,4 … times.
In order not to increase the whole volume of the manufacturing degree of difficulty of monomer electricity core and control monomer electricity core, so the series connection of naked electric core 6 is accomplished on the adjacent terminal 5 of same apron 3, and the connection between the adjacent naked electric core 6 need not span naked electric core 6 promptly, has reduced the manufacturing degree of difficulty to through carrying out effectual series connection earlier in the naked electric core 6 of arranging in 1 inside of battery body and directly increasing battery body 1's overall voltage, reduce power battery package 8 battery cell use quantity, show the manufacturing degree of difficulty that reduces power battery package 8.
When the number of the terminals 5 on each cover plate 3 is two, the series connection of the formed naked electric cores 6 is completed on the same cover plate 3; when the number of terminals 5 on each cover plate 3 is more than two, the series connection of the formed naked electric core 6 is completed on different cover plates 3.
When the number of the terminals 5 provided on one of the cap plates 3 is an even number, two terminals 5, which are the positive and negative electrodes of the battery body 1, are located on the same cap plate 3. The series connection of naked electric core 6 has been guaranteed promptly and has been accomplished on same apron 3. The utility model discloses a single cell body, naked electric core, power battery package, inclusion, notions such as terminal are only for stating the convenience, and other expression modes that have the same function do not influence the right of this patent.
Example 2
As shown in fig. 6, a power battery pack 8 is formed by using the multiple-terminal 5 single batteries in embodiment 1, the multiple single batteries are arranged in the pack body 7, and the arrangement of the single batteries in the pack body 7 is that adjacent single batteries are placed in opposite directions, so that the electrical connection between the positive and negative terminals 5 of adjacent single batteries is facilitated, and the connection structure is simplified.
As shown in fig. 7, the unit cells 1 in the package body 7 are oppositely arranged, and the series connection structure of the unit cells in the package body is formed by welding or bolting through the connecting members, and the connection mode here is not limited to the bus-bar welding or bolting described in this embodiment, and the series connection mode of the unit cells in the package does not affect the right of this patent.
As shown in fig. 8, the single batteries 1 are placed in the power battery pack 8 in a serial manner, and the serial connection of the single batteries 1 can be completed before the pre-charging process of the single batteries, so that the production process of the single batteries can be further simplified, but the process is not limited to be completed in a certain process during the production of the single batteries, and can also be completed in the process of assembling the power battery pack 8.
Example 3
As shown in fig. 9, when the number of terminals 5 provided on one of the cap plates 3 is an odd number, two terminals 5, which are positive and negative electrodes of the battery body 1, are located on the two cap plates 3, respectively. Same, save space, naked electric core 6 in the battery body 1 is arranged and is adopted adjacent naked electric core 6 to place in opposite directions, and the series connection of naked electric core 6 is accomplished on two apron 3.
Based on the above design, the inventor makes the following design calculation:
taking an electric core with the thickness of 13.5mm (thickness) 1210mm (length) 103mm (width) as an example, under the same chemical system, under the condition that a material system of a newly designed battery is similar, the energy density of the electric core is remarkably improved, the endurance of the electric vehicle is directly improved by 100km, the competitiveness of an electric vehicle is further improved, the endurance of lithium iron phosphate can be increased to 700km under the current chemical system and process conditions, and the technology can promote the endurance of the lithium iron phosphate to step into an 800km endurance electric vehicle line and row along with the improvement of the chemical system in the future.
TABLE 1 energy Density upgrade COMPARATIVE TABLE
| One positive and one negative Terminal design | Two positive and two negative Terminal design | Three positive and three negative Terminal design | Four positive and four negative Terminal design | … | Remarks for note | |
| Battery thickness (mm) | 13.5 | 27 | 40.5 | 54 | ||
| Battery length (mm) | 1210 | 1210 | 1210 | 1210 | ||
| Battery width (mm) | 103 | 103 | 103 | 103 | ||
| Battery volumetric energy density (Wh/L) | 380 | 425 | 436 | 441 | Analogy under the same chemical system conditions | |
| Single cell electric quantity/kwh | 0.64 | 1.43 | 2.20 | 2.97 | ||
| Vehicle battery number/pcs | 120 | 60 | 40 | 30 | ||
| Electric quantity/kwh of whole vehicle | 76.7 | 85.8 | 88.0 | 89.0 | ||
| Continuation of journey/km of whole vehicle | 604 | 676 | 693 | 701 |
Claims (8)
1. A multi-terminal cell, comprising:
the battery comprises a battery body and a battery cover plate, wherein the battery body is provided with a shell with the length of L and the width of H, the cover plates are symmetrically connected to the left end and the right end of the shell, and a single battery sealing structure is formed between the shell and the cover plates;
further comprising: a plurality of terminals disposed on one of the cover plates, and the same number of terminals disposed on the other cover plate; the terminals adjacent to each other in the x and y directions show different positive and negative polarities.
2. The multi-terminal single battery of claim 1, wherein two terminals are positive and negative electrodes of the battery body, and the other terminals are connected to the battery body by welding or bolts, so that the battery body forms a series structure of bare cells.
3. The multi-terminal single battery according to claim 2, wherein when the number of terminals on each cover plate is two, the series connection of the formed bare cells is completed on the same cover plate; when the number of terminals on each cover plate is more than two, the series connection of the formed naked electric core is completed on different cover plates.
4. The multi-terminal unit cell of claim 2, wherein when the number of terminals provided on one of the cap plates is an even number, two terminals, which are positive and negative electrodes of the battery body, are located on the same cap plate.
5. The multi-terminal unit cell of claim 2, wherein when the number of the terminals provided on one of the cap plates is an odd number, two terminals, which are positive and negative electrodes of the cell body, are respectively provided on the two cap plates.
6. The multi-terminal single battery according to any one of claims 2 to 5, wherein the bare cells in the battery body are placed in opposite directions with respect to the positive and negative electrodes of adjacent bare cells, so that the series connection of the bare cells inside is facilitated.
7. A power battery pack, comprising: a plurality of the cells of claims 1-6, the plurality of cells disposed within a package.
8. The power battery pack according to claim 7, wherein the arrangement of the single batteries in the battery pack is that adjacent single batteries are placed in opposite directions, so that the electrical connection of positive and negative terminals of adjacent single batteries is facilitated, and the connection structure is simplified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022055531.4U CN213093247U (en) | 2020-09-18 | 2020-09-18 | Multi-terminal single battery and power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022055531.4U CN213093247U (en) | 2020-09-18 | 2020-09-18 | Multi-terminal single battery and power battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213093247U true CN213093247U (en) | 2021-04-30 |
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| CN202022055531.4U Active CN213093247U (en) | 2020-09-18 | 2020-09-18 | Multi-terminal single battery and power battery pack |
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| CN (1) | CN213093247U (en) |
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