CN220209213U - Battery and battery module - Google Patents
Battery and battery module Download PDFInfo
- Publication number
- CN220209213U CN220209213U CN202321662493.6U CN202321662493U CN220209213U CN 220209213 U CN220209213 U CN 220209213U CN 202321662493 U CN202321662493 U CN 202321662493U CN 220209213 U CN220209213 U CN 220209213U
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- Prior art keywords
- battery
- electrolyte
- film layer
- change film
- layer
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- 239000003792 electrolyte Substances 0.000 claims abstract description 57
- 230000008859 change Effects 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 9
- 239000013589 supplement Substances 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 32
- 238000004804 winding Methods 0.000 claims description 21
- 239000002033 PVDF binder Substances 0.000 claims description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 230000004308 accommodation Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 62
- 238000005507 spraying Methods 0.000 description 5
- 208000032953 Device battery issue Diseases 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model belongs to the technical field of batteries, and discloses a battery and a battery module. The battery cell is arranged in the accommodating cavity of the shell, the phase-change film layer is at least arranged on the surface of the battery cell, the phase-change film layer can absorb electrolyte in the electrolyte injection process of the battery, a jelly-shaped structure is formed by expansion of the film structure, and electrolyte stored in the jelly-shaped structure can be automatically released under the action of concentration gradient after the battery cell consumes part of electrolyte so as to supplement the electrolyte. The phase change film layer is arranged on the surface of the battery core, has certain thickness and elasticity after absorbing electrolyte, and can continuously supplement the electrolyte consumed by the battery core in the use process of the battery, so that the cycle performance of the battery is ensured, and the condition of electric quantity water jump is avoided; meanwhile, the jelly-shaped structure can be used as an elastic support body, so that the state of the battery core is stable in the event of collision, and the safety and reliability of the battery are improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery and a battery module.
Background
In the global great importance of climate change and energy conservation and carbon reduction, renewable energy sources and electric automobiles drive the market demands of various large-scale energy storage and power lithium ion batteries closely related to the renewable energy sources and the electric automobiles, and higher requirements are also put on the stability and safety of the stored energy sources.
The prior art development is more prone to adopting a mode that a plurality of high-capacity batteries are directly connected in series to form a lithium ion battery pack, and the mode can not only reduce the number of connecting pieces and the complexity of a battery management system, but also improve the energy density of the batteries and reduce the cost.
However, the increase in the size of the battery can lead to poor wettability of the electrolyte of the battery, and the electrolyte is easily depleted before the cycle life arrives, so that the situations of battery cycle water jump, battery failure and the like occur.
Therefore, there is a need for a battery and a battery module that solve the above-mentioned problems.
Disclosure of Invention
The utility model aims to provide a battery and a battery module, which improve the wettability of electrolyte, prolong the service life of the battery and ensure the cycle performance and the use safety of the battery.
To achieve the purpose, the utility model adopts the following technical scheme:
a battery, comprising: the shell is provided with a containing cavity, and the cover plate is covered at the opening of the containing cavity; the battery cell is arranged in the accommodating cavity; the phase change film layer is at least arranged on the surface of the battery cell, can absorb electrolyte in the liquid injection process of the battery and is expanded by a film structure to form a jelly-shaped structure, and the electrolyte stored in the jelly-shaped structure can be automatically released under the action of concentration gradient after the battery cell consumes part of the electrolyte so as to supplement the electrolyte; and the pole is arranged on the cover plate.
Preferably, a gap is formed between the battery cell and the bottom surface of the cover plate, the electrolyte is stored in the gap to form a liquid storage layer, and the electrolyte in the liquid storage layer is used for supplementing the phase-change film layer and/or the battery cell with the electrolyte.
Preferably, the battery cell includes a tab, the tab is located in the liquid storage layer, and the phase-change film layer is disposed on an outer wall surface of the tab.
Preferably, the battery further includes a support member disposed within the reservoir layer and located on at least one side of the tab.
Preferably, the battery cell further comprises a winding core, and the phase change film layer is further arranged on the outer wall surface of the winding core and/or inside the winding core; the support piece is provided with a liquid storage tank, the bottom of the liquid storage tank is provided with a flow hole, and the electrolyte flows from the liquid storage layer to the phase change film layer arranged on the outer wall surface of the winding core and/or in the winding core through the flow hole.
Preferably, the phase change film layer is further disposed on an inner wall of the liquid storage tank and/or an inner wall of the housing.
Preferably, the number of the electric cores is multiple, the electric cores are arranged in the shell in parallel, and the phase-change film layer is further arranged between the electric cores.
Preferably, the phase change film layer is one of a methyl methacrylate layer, a polyethylene oxide layer and a polyvinylidene fluoride layer.
Preferably, the thickness of the phase change film layer is 0.1 mm-5 mm.
A battery module comprises the battery, and a plurality of batteries are connected in series or in parallel to form the battery module.
The beneficial effects are that:
according to the battery provided by the utility model, the phase change film layer is sprayed on the surface of the battery core, and can form a jelly-like structure with certain thickness and elasticity after absorbing electrolyte, and the jelly-like structure can continuously supplement the electrolyte consumed by the battery core in the use process of the battery, so that the wettability of the electrolyte is improved, the cycle performance of the battery is ensured, and the problems of high-capacity battery cycle water jump and battery failure caused by electrolyte exhaustion are solved; meanwhile, the jelly-shaped structure can be used as an elastic support body, so that the battery core is prevented from shaking in the shell when the battery collides, and the safety and reliability of the battery are improved.
The battery module provided by the utility model can improve the safety characteristic and the service life of the battery on the premise of ensuring the battery capacity.
Drawings
FIG. 1 is a cross-sectional view of a battery provided by the present utility model with a single side outlet post;
FIG. 2 is a cross-sectional view of a battery provided by the present utility model with two side out posts;
FIG. 3 is a top view of a support for a battery provided by the present utility model;
fig. 4 is a side view of a support for a battery provided by the present utility model;
fig. 5 is a schematic structural view of a battery provided by the utility model, including a single cell;
fig. 6 is a schematic structural diagram of a battery provided by the utility model, which includes a plurality of battery cells.
In the figure:
1. a housing; 2. a cover plate; 3. a battery cell; 31. a tab; 4. a phase change film layer; 5. a pole; 6. a liquid storage layer; 7. a support; 71. a liquid storage tank; 72. and a flow hole.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
The utility model provides a battery which can be applied to a large-capacity battery. As shown in fig. 1, the battery comprises a shell 1, a cover plate 2, a battery cell 3 and a pole 5, wherein the shell 1 is provided with a containing cavity, the battery cell 3 is arranged in the containing cavity, the cover plate 2 is covered at an opening of the containing cavity and used for assembling and assembling the battery, and the cover plate 2 is matched with the pole 5 to play a role of conducting current. The battery is also internally sprayed with a phase change film layer 4, the phase change film layer 4 is at least arranged on the surface of the battery core 3, and the phase change film layer 4 can absorb electrolyte in the liquid injection process of the battery and is expanded by a film structure to form a jelly-shaped structure. After the cell 3 consumes part of electrolyte, the electrolyte stored in the jelly-like structure can be automatically released under the action of concentration gradient to supplement the electrolyte, so that the sufficient content and stable concentration of the electrolyte used for consumption in the battery are ensured, the wettability of the electrolyte is improved, the problems of high-capacity battery circulating water and battery failure caused by the exhaustion of the electrolyte are solved, the circulating performance of the battery is ensured, and the service life of the battery is prolonged. Meanwhile, the phase change film layer 4 after absorbing the electrolyte can form a jelly-shaped structure with certain thickness and elasticity, and the jelly-shaped structure can be used as an elastic support body to completely wrap the battery cell 3 so as to ensure that the battery cell 3 does not shake in the shell 1 when the battery collides, thereby improving the safety and reliability of the battery.
In the process of using the battery, the battery core 3 can continuously consume the electrolyte originally injected into the battery, after long-term use, the electrolyte content is reduced, the electrolyte wettability is poor, and therefore the voltage of the battery is reduced, and the electric quantity is consumed too quickly, so that in order to prolong the service life of the battery, a gap is formed between the battery core 3 and the bottom surface of the cover plate 2, and the electrolyte is injected into the gap in advance in the process of injecting the electrolyte, so that the electrolyte is reserved and a liquid storage layer 6 is formed. The electrolyte in the reservoir layer 6 may be used to supplement the electrolyte in the phase change film layer 4 or may be used directly to supplement the electrolyte consumed by the charge core 3. It should be noted that the above structure is applicable to both the battery with the single-side outlet post and the battery with the double-side outlet post. In the case of the battery single-side outlet post, as shown in fig. 1, the liquid storage layer 6 is provided at one end of the battery, and in the case of the double-side outlet post, as shown in fig. 2, the liquid storage layer 6 is provided at both ends of the battery.
As shown in fig. 1, the battery cell 3 includes tabs 31 for leading out positive and negative electrodes from the battery cell 3 to communicate with the outside as contact points when the battery is charged and discharged. The tab 31 is located in the liquid storage layer 6, and the phase change film layer 4 is arranged on the outer wall surface of the tab 31, so that electrolyte can be additionally stored, and the wettability and coverage area of the electrolyte are ensured.
Further, as shown in fig. 1 to 4, the battery further includes a support 7, and the support 7 is disposed in the liquid storage layer 6 and located on at least one side of the tab 31. The support piece 7 is used for supporting the tab 31, plays fixed and spacing effect, avoids the tab 31 to take place to buckle or contact with the casing 1 when the battery rocks and causes the appearance of the service failure of battery, in addition, the support piece 7 can also support electric core 3, carries out spacingly to it on the length direction of electric core 3, avoids the position of electric core 3 to change.
The battery cell 3 further comprises a winding core, wherein the winding core is formed in a stacking or winding mode; in some embodiments, the phase change film layer 4 is disposed on the outer wall surface of the winding core; in some embodiments, a phase change film layer 4 is also provided inside the winding core; in some embodiments, the phase change film layer 4 is arranged on the outer wall surface of the winding core and inside the winding core, and the storage capacity of electrolyte can be improved by arranging the phase change film layer on the outer wall surface of the winding core and inside the winding core, so that the stability and the safety of the winding core inside the battery core 3 are ensured.
As shown in fig. 3 and 4, in order to increase the liquid storage amount and ensure the wettability of the electrolyte while supporting the limit fixed tab 31, the support 7 is further provided with a liquid storage tank 71, the bottom of the liquid storage tank 71 is gradually inclined from both sides to the middle, and the bottom of the liquid storage tank 71 is provided with a through hole 72, the through hole 72 is a through hole penetrating the bottom of the tank in the thickness direction of the bottom, and the electrolyte stored in the liquid storage layer 6 can flow from the liquid storage layer 6 to the phase change film layer 4 disposed on the outer wall surface of the winding core through the through hole 72 under the guidance of the inclined bottom of the tank.
With continued reference to fig. 4, the longitudinal cross-section of the sump 71 is "V" shaped, and in some other embodiments, the longitudinal cross-section of the sump 71 may be "U" shaped. In some embodiments, the shape of the flow holes 72 is a kidney shape, and in some other embodiments, the shape of the flow holes 72 may be circular or diamond-shaped. It should be noted that the number of the flow holes 72 may be one or more according to the requirement.
Further, in some embodiments, a phase change film layer 4 is provided on the inner wall of the liquid reservoir 71; in some embodiments, a phase change film layer 4 is also provided on the inner wall of the housing 1; in still other embodiments, the phase-change film layer 4 is disposed on the inner wall of the liquid storage tank 71 and the inner wall of the casing 1, so that the coverage of the phase-change film layer 4 and the maximization of the stored electrolyte amount are realized, and the condition of depletion of the electrolyte is reduced. It should be noted that, the spraying positions of the phase-change film layer 4 include, but are not limited to, the spraying can be performed according to the actual use condition, and only the requirements that the normal use of the battery is not affected, the liquid storage amount of the battery can be improved, and the safety of the battery can be improved are met.
Further, according to different capacity demands of the battery, as shown in fig. 5 and 6, the number of the battery cells 3 can be set to be one or a plurality, when a plurality of battery cells 3 are arranged in the battery, the battery cells 3 are arranged in the shell 1 in parallel, a phase-change film layer 4 is further arranged between the battery cells 3, the phase-change film layer 4 between the battery cells 3 can form a jelly-shaped structure with a certain thickness and elasticity after absorbing electrolyte, the jelly-shaped structure can be used as an elastic support body to provide buffer space for the battery cells 3, so that the battery cells 3 are prevented from collision or contact when the battery shakes, and the stability and the safety of the battery cells 3 in the battery are improved.
It should be noted that, in some embodiments, the phase-change film layer 4 may be a single-layer structure, the phase-change film layer 4 is one of a methyl methacrylate (PMMA) layer, a polyethylene oxide (PEO) layer, a polyvinylidene fluoride (PVDF) layer, a polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) layer, and a Polyacrylonitrile (PAN) layer, and in other embodiments, the phase-change film layer 4 may also be a multi-layer structure, and the above-mentioned multiple material layers may be combined to form the phase-change film layer 4.
In some embodiments, the phase-change film layer 4 can be processed by adopting an air spraying and electrostatic spraying method; in some other embodiments, the processing can also be performed by adopting a low-flow medium-pressure spraying and transfer printing method, and a high-pressure spraying method is preferred from the aspects of the process maturity and the production integration.
In order to improve the ability of the phase-change film layer 4 to absorb electrolyte and ensure the expansion supporting effect of the jelly-like structure, the thickness of the phase-change film layer 4 is generally 0.1 mm to 5 mm, and the thickness of the jelly-like structure formed by expanding the phase-change film layer 4 is generally 0.3 mm to 10mm, and of course, the specific thickness of the phase-change film layer 4 is also determined according to the actual size of the battery.
The embodiment also provides a battery module, which comprises the battery, and a plurality of batteries are connected in series or in parallel to form the battery module. The battery module formed by the battery not only can reduce the number of connecting pieces, reduce the complexity of a battery management system, improve the energy density of the battery and reduce the cost, but also can improve the wettability of electrolyte and reduce the influence of the size of the battery on the service life of the battery and the safety of the battery.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. A battery, comprising:
the device comprises a shell (1) and a cover plate (2), wherein the shell (1) is provided with a containing cavity, and the cover plate (2) is covered at an opening of the containing cavity;
the battery cell (3), the said battery cell (3) is set up in the said accommodation cavity;
the phase change film layer (4) is at least arranged on the surface of the electric core (3), the phase change film layer (4) can absorb electrolyte in the liquid injection process of the battery and is expanded by a film structure to form a jelly-shaped structure, and the electrolyte stored in the jelly-shaped structure can be automatically released under the action of a concentration gradient after the electric core (3) consumes part of the electrolyte so as to supplement the electrolyte;
and the pole (5) is arranged on the cover plate (2).
2. The battery according to claim 1, characterized in that a gap is formed between the cell (3) and the bottom surface of the cover plate (2), the electrolyte is stored in the gap to form a liquid storage layer (6), and the electrolyte in the liquid storage layer (6) is used for supplementing the electrolyte to the phase-change film layer (4) and/or the cell (3).
3. The battery according to claim 2, wherein the battery cell (3) includes a tab (31), the tab (31) is located in the liquid storage layer (6), and the phase change film layer (4) is disposed on an outer wall surface of the tab (31).
4. A battery according to claim 3, characterized in that the battery further comprises a support (7), the support (7) being arranged within the reservoir layer (6) and on at least one side of the tab (31).
5. The battery of claim 4, wherein the battery is provided with a plurality of electrodes,
the battery cell (3) further comprises a winding core, and the phase change film layer (4) is arranged on the outer wall surface of the winding core and/or in the winding core;
the support piece (7) is provided with a liquid storage groove (71), the bottom of the liquid storage groove (71) is provided with a flow hole (72), and the electrolyte flows from the liquid storage layer (6) to the phase change film layer (4) arranged on the outer wall surface of the winding core and/or in the winding core through the flow hole (72).
6. The battery according to claim 5, characterized in that the phase change film layer (4) is also provided on the inner wall of the reservoir (71) and/or on the inner wall of the housing (1).
7. The battery according to claim 1, wherein the number of the electric cores (3) is plural, the electric cores (3) are arranged in the housing (1) in parallel, and the phase-change film layer (4) is further arranged between the electric cores (3).
8. The battery according to any one of claims 1 to 7, wherein the phase change film layer (4) is one of a methyl methacrylate layer, a polyethylene oxide layer, and a polyvinylidene fluoride layer.
9. The battery according to any one of claims 1 to 7, wherein the thickness of the phase-change film layer (4) is 0.1 mm to 5 mm.
10. A battery module comprising the battery of any one of claims 1-9, wherein a plurality of the batteries are connected in series or in parallel to form the battery module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321662493.6U CN220209213U (en) | 2023-06-28 | 2023-06-28 | Battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321662493.6U CN220209213U (en) | 2023-06-28 | 2023-06-28 | Battery and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220209213U true CN220209213U (en) | 2023-12-19 |
Family
ID=89146527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321662493.6U Active CN220209213U (en) | 2023-06-28 | 2023-06-28 | Battery and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220209213U (en) |
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2023
- 2023-06-28 CN CN202321662493.6U patent/CN220209213U/en active Active
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