CN112993463A - Battery cell with built-in buffer cushion - Google Patents
Battery cell with built-in buffer cushion Download PDFInfo
- Publication number
- CN112993463A CN112993463A CN202110163647.6A CN202110163647A CN112993463A CN 112993463 A CN112993463 A CN 112993463A CN 202110163647 A CN202110163647 A CN 202110163647A CN 112993463 A CN112993463 A CN 112993463A
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- Prior art keywords
- electric core
- battery cell
- monomer
- buffer pad
- built
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention belongs to the technical field of lithium ion batteries, and discloses a battery cell with a built-in buffer pad, which comprises a battery cell shell and a naked battery cell monomer arranged in the battery cell shell, wherein the battery cell shell is configured to isolate the internal environment of the naked battery cell from contacting the outside, and the naked battery cell monomer is provided with the buffer pad. According to the battery cell with the built-in buffer pad, the buffer pad is directly arranged in contact with the naked battery cell through the built-in buffer pad, so that the liquid retention performance of the battery cell is improved, the liquid injection difficulty of the battery cell is reduced, and the long-term performance of the battery cell shell is improved. By adopting the module unit consisting of the battery cores with the built-in buffer pads, the buffer pads are not required to be arranged between the battery cores, and the space originally used for arranging the buffer pads between the battery cores is completely transferred to the internal space of the battery cores under the condition that the internal space of the module unit is fixed, so that the space utilization rate and the grouping efficiency of the battery cores are improved; and the blotter has improved the hardness of electric core inside electric core, and then is showing hardness and the rigidity that improves the module unit.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a battery cell with a built-in buffer pad.
Background
As one of the most central components of new energy vehicles, lithium ion batteries have the advantages of high energy density, long cycle life, safety, environmental protection, and the like, and are gradually becoming the mainstream direction of the electric era. The voltage of the single lithium ion battery is only 3.7V, while the driving voltage of the automobile motor is about 400V generally, and the voltage of the single lithium ion battery can not meet the requirement of driving the electric automobile. In order to meet the driving voltage requirement of an automobile motor, in the prior art, single battery cells are connected in series to meet the matching of the voltage of a system and the voltage of the motor. The battery system is generally about 100 strings, and a small number of monomer cells are required to be connected in series to form a module unit, and then the module units are connected in series to reach the output voltage range of the system. Module assembly process needs arrange monomer electric core earlier, increases the blotter between the monomer electric core, connects between the monomer electric core output pole again to realize the electricity in the module and connect. Although the problem of module structure has been solved to the blotter, under the certain circumstances of module inner space, because the blotter has taken some module inner space, lead to monomer electricity core itself volume utilization not high, influence the module and efficiency in groups.
Disclosure of Invention
The invention aims to provide a battery cell with a built-in buffer cushion, and aims to solve the problems that the volume utilization rate of the battery cell is low and the module grouping efficiency is influenced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an electric core of built-in blotter, is in including electric core shell and setting naked electric core monomer in the electric core shell, electric core shell is configured as completely cut off naked electric core monomer and external contact, be provided with the blotter on the naked electric core monomer.
Preferably, the buffer pad is arranged at one end of the naked battery cell monomer.
Preferably, the other end of the naked battery cell monomer is provided with the buffer pad.
Preferably, the battery cell shell is an aluminum-plastic film or a metal shell, and the bare battery cell monomer is wrapped by the aluminum-plastic film or the metal shell.
As preferred, naked electric core monomer is at least two, including the naked electric core monomer of first naked electric core monomer and second, first naked electric core monomer sets up the naked electric core monomer's of second one end.
As preferred, first naked electric core monomer is provided with the blotter, just the naked electric core monomer of second is provided with the blotter, first naked electric core monomer the blotter setting is keeping away from the naked electric core monomer one end of second, the naked electric core monomer of second the blotter setting is keeping away from the free one end of first naked electric core.
Preferably, the blotter setting is in first naked electric core monomer with between the naked electric core monomer of second.
Preferably, the first naked electric core monomer is kept away from the one end of the second naked electric core monomer and is provided with the buffer pad.
Preferably, the naked electric core monomer of second is kept away from the naked electric core monomer's of second one end is provided with the blotter.
Preferably, the buffer pad is porous compressible foam, and the porous compressible foam is of a whole-piece structure or an intermediate hollowed structure.
The invention has the beneficial effects that: the invention provides an electric core with a built-in buffer cushion, which is characterized in that the buffer cushion is arranged in the electric core, the buffer cushion is directly arranged in contact with a naked electric core, then the naked electric core provided with the buffer cushion is arranged in an electric core shell to form the electric core with the built-in buffer cushion, a module unit consisting of the electric core provided with the built-in buffer cushion is adopted, the buffer cushion is not required to be arranged between the electric cores, under the condition that the internal space of the module unit is certain, the space originally used for arranging the buffer cushion between the electric cores is completely given to the internal space of the electric core, the space utilization rate and the grouping efficiency of the electric core are improved, meanwhile, the built-in buffer cushion improves the liquid retention; and the blotter has improved the hardness of electric core inside the electric core, and then is showing hardness and the rigidity that improves the module unit, mends the short board of module intensity, is favorable to developing bigger size module unit.
Drawings
Fig. 1 is a schematic view of a cushion-embedded battery cell according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a cushion-embedded battery cell according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of a battery cell with a built-in buffer pad according to a third embodiment of the present invention.
In the figure:
1. a cell shell; 2. naked electric core monomer; 21. a first bare cell monomer; 22. a second bare cell monomer; 3. a cushion pad.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
The embodiment provides an electric core of built-in blotter, as shown in fig. 1, including electric core shell 1 and naked electric core monomer 2, wherein, be provided with blotter 3 on the naked electric core monomer 2, naked electric core monomer 2 sets up in electric core shell 1, and electric core shell 1 is used for isolated naked electric core monomer 2 and external contact, prevents that the electrolyte in the electric core from leaking. Adopt the module unit that the electric core of the built-in blotter of this embodiment is constituteed, need not to set up the blotter between the electric core, reduce the design and the assembly complexity of module unit, under the certain circumstances of module unit inner space, will be used for originally setting up the space of blotter between electric core, all let and give electric core inner space, electric core space utilization and efficiency in groups have been improved, and blotter 3 is at the inside hardness that has improved electric core of electric core, and then show hardness and the rigidity that improves the module unit, fill module intensity short slab together, be favorable to developing bigger size module unit.
The cushion pad 3 of the embodiment can be, but is not limited to, porous compressible foam, which improves the liquid absorption and retention capacity of the battery cell itself inside the battery cell, reduces free electrolyte between the bare cell monomer 2 and the battery cell shell 1, and can improve the hardness of the battery cell; and the cotton electric core of improving of porous compressible bubble annotates the liquid coefficient, promotes electric core life, because electric core life is longer, the cotton quilt of porous compressible bubble is taken place the inflation and the proportion of compression just is big more by naked electric core monomer 2, and the cotton interior electrolyte of porous compressible bubble is extruded more, for naked electric core monomer 2 replenishment more electrolyte in later stage, consequently, can improve electric core life.
Preferably, the porous compressible foam is of a whole-piece structure or a middle hollow structure (namely a square frame structure), and the porous compressible foam adopting the whole-piece structure is simple in structure, easy to process and easy to place between the naked electric core monomer 2 and the electric core shell 1; the porous compressible foam of the middle hollowed structure can improve the free space inside the battery core in a wider range, when the naked battery core monomer 2 expands, the expanded part does not influence the structure of the battery core shell 1 in the middle hollowed structure, and the cost is saved due to the middle hollowed structure.
Optionally, naked electric core monomer 2's one end is provided with blotter 3, and naked electric core monomer 2 that one end set up blotter 3 arranges in electric core shell 1, and blotter 3 and electric core shell 1's one side inner wall contact is passed through to naked electric core monomer 2's one end, and when naked electric core monomer 2 took place the inflation, blotter 3 shrink absorbed in order to realize absorbing the space of naked electric core monomer 2 expanded part, prevents that naked electric core monomer 2 inflation from making electric core shell 1 take place deformation.
Further, naked electric core monomer 2's the other end also can be provided with blotter 3, the blotter 3 of naked electric core monomer 2's one end sets up with the blotter 3 of naked electric core monomer 2's the other end relatively, naked electric core monomer 2 that relative both ends all set up blotter 3 arranges in electric core shell 1, naked electric core monomer 2's both ends all through blotter 3 and electric core shell 1's both sides inner wall contact, when naked electric core monomer 2 takes place the inflation, the blotter 3 at naked electric core monomer 2's both ends can absorb naked electric core monomer 2 expanded part, prevent better that naked electric core monomer 2 inflation from making electric core shell 1 take place deformation, electric core shell 1's stable in structure has been guaranteed, and naked electric core monomer 2's both ends all set up blotter 3 and can strengthen the insulating properties between naked electric core monomer 2 and the electric core shell 1, avoid the emergence of.
Further, cell shell 1 can be but not limited to be plastic-aluminum membrane or metal casing, and the plastic-aluminum membrane wraps up naked electric core monomer 2 that is provided with blotter 3 to form soft-packaged electric core, adopt the plastic-aluminum membrane as cell shell 1, can effectively avoid naked electric core monomer 2 to take place the inflation and cause the explosion often, and the weight of plastic-aluminum membrane is lighter.
Example two
The embodiment provides a battery cell with a built-in buffer pad, as shown in fig. 2, which includes a battery cell casing 1 and a bare cell monomer 2, where the bare cell monomer 2 includes at least two bare cell monomers 21 and a second bare cell monomer 22, the first bare cell monomer 21 is disposed at one end of the second bare cell monomer 22, that is, the first bare cell monomer 21 and the second bare cell monomer 22 are stacked, a plurality of bare cell monomers 2 can also be stacked between the first bare cell monomer 21 and the second bare cell monomer 22, both the first bare cell monomer 21 and the second bare cell monomer 22 are provided with the buffer pad 3, the buffer pad 3 of the first bare cell monomer 21 is disposed at one end of the first bare cell monomer 21 away from the second bare cell monomer 22, the buffer pad 3 of the second bare cell monomer 22 is disposed at one end of the second bare cell monomer 22 away from the first bare cell monomer 21, first naked electric core monomer 21 and the naked electric core monomer 22 of second superpose and set up the back and arrange in the shell of electricity core shell 1, electricity core shell can be the crust structure, in order to form the crust electricity core, the crust structure can but not be limited to metal casing, first naked electric core monomer 21 passes through the contact of blotter 3 with one side inner wall of electricity core shell 1, the insulating properties between first naked electric core monomer 21 of reinforcing and the electricity core shell 1, the short circuit risk of the first naked electric core monomer 21 of greatly reduced and electricity core shell 1, the naked electric core monomer 22 of same second passes through the contact of blotter 3 with the opposite side inner wall of electricity core shell 1, the insulating properties between naked electric core monomer 22 of reinforcing second and electricity core shell 1, and the short circuit risk of the naked electric core monomer 22 of greatly reduced second and electricity core shell 1.
EXAMPLE III
This embodiment provides an electric core of built-in blotter, as shown in fig. 3, its difference with embodiment two lies in that the position that sets up of blotter 3 is different, be provided with blotter 3 between first naked electric core monomer 21 in this embodiment and the naked electric core monomer 22 of second, when stack sets up a plurality of naked electric core monomers 2 between first naked electric core monomer 21 and the naked electric core monomer 22 of second, all be provided with blotter 3 between a plurality of naked electric core monomers 2, further strengthen imbibition and protect liquid ability, reduce free electrolyte. Optionally, the one end that naked electric core monomer 22 of second was kept away from to first naked electric core monomer 21 is provided with blotter 3, or the one end that naked electric core monomer 22 of second kept away from first naked electric core monomer 21 is provided with naked electric core, or the one end that naked electric core monomer 22 of second was kept away from to first naked electric core monomer 21 and the one end that naked electric core monomer 22 of second kept away from first naked electric core monomer 21 all are provided with blotter 3.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides an electric core of built-in blotter, its characterized in that is in including electric core shell (1) and setting naked electric core monomer (2) in electric core shell (1), electric core shell (1) is configured as completely cut off naked electric core monomer (2) and external contact, be provided with blotter (3) on naked electric core monomer (2).
2. The cushion-embedded cell of claim 1, wherein the cushion (3) is provided at one end of the bare cell body (2).
3. The cushion-embedded cell of claim 2, wherein the other end of the bare cell body (2) is provided with the cushion pad (3).
4. The battery cell with the built-in buffer pad of claim 3, wherein the battery cell casing (1) is an aluminum-plastic film or a metal shell, and the bare cell unit (2) is wrapped by the aluminum-plastic film or the metal shell.
5. The battery cell of the built-in buffer pad of claim 1, wherein the bare cell (2) is at least two, including a first bare cell (21) and a second bare cell (22), the first bare cell (21) is disposed at one end of the second bare cell (22).
6. The battery cell of built-in buffer pad of claim 5, wherein the first bare cell (21) is provided with the buffer pad (3), and the second bare cell (22) is provided with the buffer pad (3), the buffer pad (3) of the first bare cell (21) is disposed at one end away from the second bare cell (22), and the buffer pad (3) of the second bare cell (22) is disposed at one end away from the first bare cell (21).
7. The battery cell of a built-in buffer pad of claim 5, wherein the buffer pad (3) is disposed between the first bare cell unit (21) and the second bare cell unit (22).
8. The battery cell of the built-in buffer pad of claim 7, wherein one end of the first bare cell unit (21) away from the second bare cell unit (22) is provided with the buffer pad (3).
9. The battery cell of the built-in buffer pad of claim 8, wherein one end of the second bare cell unit (22) away from the second bare cell unit (22) is provided with the buffer pad (3).
10. The battery cell of any one of claims 1 to 9, wherein the buffer (3) is a porous compressible foam, and the porous compressible foam is of a whole-piece structure or an intermediate hollowed-out structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110163647.6A CN112993463A (en) | 2021-02-05 | 2021-02-05 | Battery cell with built-in buffer cushion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110163647.6A CN112993463A (en) | 2021-02-05 | 2021-02-05 | Battery cell with built-in buffer cushion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112993463A true CN112993463A (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110163647.6A Withdrawn CN112993463A (en) | 2021-02-05 | 2021-02-05 | Battery cell with built-in buffer cushion |
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| Country | Link |
|---|---|
| CN (1) | CN112993463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116826324A (en) * | 2023-08-23 | 2023-09-29 | 宁德时代新能源科技股份有限公司 | Cushion, battery cell, battery and electricity utilization device |
-
2021
- 2021-02-05 CN CN202110163647.6A patent/CN112993463A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116826324A (en) * | 2023-08-23 | 2023-09-29 | 宁德时代新能源科技股份有限公司 | Cushion, battery cell, battery and electricity utilization device |
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Application publication date: 20210618 |