CN114725599A - Lithium ion battery with buffer structure - Google Patents
Lithium ion battery with buffer structure Download PDFInfo
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- CN114725599A CN114725599A CN202210271669.9A CN202210271669A CN114725599A CN 114725599 A CN114725599 A CN 114725599A CN 202210271669 A CN202210271669 A CN 202210271669A CN 114725599 A CN114725599 A CN 114725599A
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- 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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- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- 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)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Public Health (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a lithium ion battery with a buffer structure, which comprises a lithium ion battery cell, wherein the lithium ion battery cell comprises a battery cell main body and a buffer cavity, the buffer cavity consists of an outer shell and an inner shell, the inner shell is provided with a plurality of discharge mechanisms which are respectively arranged at the upper end and the lower end of the inner shell, the discharge mechanisms are discharge ports, the buffer cavity is arranged at positions according to the extrusion direction possibly suffered by the battery cell, and a mixture of a liquid flame retardant and a normal-temperature solid phase-change material is injected into the buffer cavity. The buffer cavity can provide buffer when the battery cell is extruded, and can absorb kinetic energy through the deformation of the buffer layer when the battery cell is violently collided, so that the safety performance of the battery cell is improved; the flame retardant and the phase-change material mixture are injected into the buffer cavity, and the liquid flame retardant enters the battery cell during collision to prevent the battery cell from being ignited; the phase-change material can absorb heat through the phase-change material when the temperature of the battery cell is too high, so that the temperature of the battery cell is reduced, the working environment of the battery cell is improved, and the thermal runaway of the battery cell is delayed; the discharge port is arranged, so that the flame retardant can be directionally released into the battery core.
Description
Technical Field
The invention belongs to the technical field of electric automobiles, and particularly relates to a lithium ion battery with a buffer structure.
Background
In recent years, electric vehicles have been accepted, and as electric vehicles have become popular, the problem of battery safety has become a major issue. Lithium ion batteries have become the most promising and competitive secondary batteries at present due to their advantages of high operating voltage, large specific energy, small self-discharge, no memory effect, long life, small environmental pollution, etc., and have been emerging in the fields of electric vehicles, energy storage, etc. Meanwhile, the safety problem of the lithium ion battery is more and more emphasized by people. Due to the characteristics of the lithium ion battery, when the lithium ion battery is deformed by collision, the battery is easily ignited and even explodes. If the buffering capacity of the battery cell can be improved on the battery cell basis, the safety performance of the battery cell can be improved to a great extent.
The prior art discloses a double-layer shell structure, arranges the shell frame of fretwork inside current casing, adopts the second shock attenuation unit to support, forms the cavity of a fretwork, thereby this cavity position electricity core provides certain cushioning effect and improves the security performance. However, the cavity in the structure is communicated with the battery cell and only can play a certain buffering role, the cavity is not fully utilized, the battery cell shell is damaged by collision, and the pole core can still be exposed in the environment, so that potential safety hazards are caused.
The prior art also discloses a safe battery shell, which is arranged at the top cover part of the battery core, a fire extinguishing container is internally provided with a solid fire extinguishing agent, and the fire extinguishing agent is sprayed into the battery core to extinguish fire by breaking a discharge part when the battery core is out of control due to heat. This patent just can start the action of putting out a fire after thermal runaway, does not increase the protective capacities of electric core by way, and the thermal runaway of battery often accompanies a large amount of gaseous blowout in addition, is located near the inside fire extinguishing agent of the container of putting out a fire near top cap explosion-proof valve and can probably be blown away, is difficult to get into the inside effect of putting out a fire that plays of electric core.
Therefore, the lithium ion battery with a self-buffering cooling structure is urgently needed to be developed so as to improve the safety performance of the battery core.
Disclosure of Invention
The invention aims to provide a lithium ion battery with a self-buffering cooling structure, which is used for solving the problem of battery safety caused by extrusion of a battery core and simultaneously providing a certain cooling capacity. According to the invention, the other cavity is additionally arranged on the outer side of the battery core shell to form the buffer layer, and the liquid flame retardant and phase-change material mixture is filled between the buffer layer and the battery core shell, so that the buffer is provided for the battery core, the anti-impact capability of the battery core is improved, and the purpose of inhibiting the battery core from firing is achieved by spraying the liquid in the buffer layer into the battery core when the battery is collided; meanwhile, the phase-change material in the buffer layer absorbs heat when the battery cell releases heat, so that the working environment of the battery cell is improved, and the performance of the battery cell is improved.
The purpose of the invention is realized by the following technical scheme:
a lithium ion battery with a buffer structure comprises a lithium ion cell; the lithium ion battery cell mainly comprises a battery cell main body and a buffer cavity;
the buffer cavity consists of an outer shell and an inner shell, and the inner shell is provided with a plurality of discharge mechanisms which are respectively arranged at the upper end and the lower end of the inner shell; the discharge mechanism is a discharge opening, and the discharge pressure of the discharge mechanism is (0.6-0.9) × a MPa, wherein a is the discharge pressure of the battery top cover pressure release valve;
the buffer cavity is arranged at a position according to the possible extrusion direction of the battery core; and a mixture of a liquid flame retardant and a normal-temperature solid phase-change material is injected into the buffer cavity.
Further, the discharge direction of the discharge port is towards the inside of the battery cell.
Further, the discharge pressure of the discharge port is more than 0.5 MPa.
Further, the discharge pressure of the discharge port is lower than that of the cell top cover.
Furthermore, the position of the buffer cavity comprises any one side or multiple sides of the battery core except the side with the lug.
Further, the phase change material is insoluble in the flame retardant and does not chemically react with the flame retardant.
Further, the mass ratio of the phase-change material to the flame retardant is 1: 1-1: 2.
Further, the phase change temperature of the phase change material is 25-65 ℃.
Further, the thermal conductivity of the phase change material is lower than 0.8W/m.K.
Further, the volume of the mixture accounts for 80-95% of the volume of the buffer cavity.
Compared with the prior art, the invention has the beneficial effects that:
1. the buffer cavity provided by the invention can provide buffer when the battery cell is extruded, and can absorb kinetic energy through the deformation of the buffer layer when the battery cell is violently collided, so that the safety performance of the battery cell is improved;
2. meanwhile, a flame retardant and a phase-change material mixing agent are injected into the buffer cavity, and the liquid flame retardant is sprayed into the battery cell through the discharge port, so that the battery cell is prevented from being ignited;
3. in addition, the phase-change material can absorb heat through the phase-change material when the temperature of the battery cell is too high, so that the temperature of the battery cell is reduced, the working environment of the battery cell is improved, and the thermal runaway of the battery cell is delayed;
drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic side view of a cell in embodiment 1 of the present invention;
fig. 2 is a schematic side view of a cell according to embodiment 2 of the present invention;
fig. 3 is a cross-sectional view of a large surface of a battery cell in embodiment 1 of the present invention.
In the figure, 1, a buffer cavity 2, a cell main body 1-1, an outer shell 1-2, an inner shell 1-3 and a discharge mechanism.
Detailed Description
The invention is further illustrated by the following examples:
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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The lithium ion battery with the buffer structure comprises a lithium ion battery core; the lithium ion battery cell mainly comprises a battery cell main body and a buffer cavity.
The buffer cavity is composed of an outer shell and an inner shell, the inner shell is provided with a discharge mechanism, the discharge mechanism is arranged at the upper end and the lower end of the inner shell respectively and can be arranged in a plurality of modes, and the discharge direction of the discharge port is towards the interior of the battery cell.
The relief pressure of the relief opening is (0.6-0.9) a MPa, wherein a is the relief pressure of the battery top cover relief valve. Preferably, the discharge pressure of the discharge port is more than 0.5MPa and is lower than the discharge pressure of the cell top cover discharge port.
The buffer cavity is arranged at a position according to the extrusion direction possibly received by the battery cell, and the position comprises any one side or multiple sides of one side of the battery cell except the lug.
And a mixture of a liquid flame retardant and a normal-temperature solid phase-change material is injected into the buffer cavity. The phase-change material is insoluble in the flame retardant and does not chemically react with the flame retardant, and the mass ratio of the phase-change material to the flame retardant is 1: 1-1: 2; the phase-change temperature of the phase-change material is 25-65 ℃, and the heat conductivity coefficient is lower than 0.8W/m.K; the volume of the mixture accounts for 80-95% of the volume of the buffer cavity.
In the invention, the buffer cavity can provide buffer when the battery core is extruded and absorb kinetic energy. The discharge mechanism can discharge the mixture in the lithium ion battery cell into the lithium ion battery cell through the discharge mechanism after the lithium ion battery cell is subjected to violent impact, so that the battery cell is prevented from being ignited. In addition, in the early stage of normal use and thermal runaway of the lithium ion battery cell, the phase-change material in the mixture can absorb heat through phase change, cool the battery cell, improve the working environment of the lithium ion battery cell and inhibit the thermal runaway of the lithium ion battery cell.
Example 1
A lithium ion battery with a buffer structure comprises a lithium ion cell; the lithium ion battery cell mainly comprises a battery cell main body and a buffer cavity.
The buffer cavity is composed of an outer shell and an inner shell, and the inner shell is provided with a discharge mechanism.
The battery cell with the lug at the top end is characterized in that a buffer cavity of the battery cell is arranged on the large surface of one side of the battery cell, and a mixture of a phosphoric acid tri (beta-chloroethyl) ester flame retardant and phase-change paraffin is injected into the buffer cavity.
The phase transition temperature of the phase transition paraffin is 25 ℃, and the mass ratio of the phosphoric acid tri (beta-chloroethyl) ester to the paraffin is 1: 1; the volume of the mixture is 80% of the volume of the buffer chamber.
The discharge mechanism is 6 discharge openings, and the discharge openings are specifically distributed as follows: the upper end of the inner shell of the battery cell is 3, the lower end of the inner shell of the battery cell is 3, and the discharge pressure is 0.6 MPa.
Example 2
A lithium ion battery with a buffer structure comprises a lithium ion cell; the lithium ion battery cell mainly comprises a tab battery cell and a buffer cavity.
The buffer cavity is composed of an outer shell and an inner shell, and the inner shell is provided with a discharge mechanism.
The top end of the battery cell is provided with a lug, the buffer cavities of the battery cell are arranged on two large faces of the battery cell, and a mixture of trichloropropylphosphate flame retardant and phase-change paraffin is injected into the buffer cavities.
The phase-change temperature of the phase-change paraffin is 65 ℃, and the mass ratio of the phase-change paraffin to trichloropropylphosphate is 1: 2; the injected buffer volume was 95% of the buffer chamber volume.
The discharge mechanism is 2 discharge openings, and the discharge openings are specifically distributed as follows: the upper end of the inner shell of the battery cell is 1, the lower end of the inner shell of the battery cell is 1, and the discharge pressure is 0.8 MPa.
Example 3
A lithium ion battery with a buffer structure comprises a lithium ion cell; the lithium ion battery cell mainly comprises a tab battery cell and a buffer cavity.
The buffer cavity comprises shell and inner shell, the inner shell is equipped with discharge mechanism.
The battery cell with the lug at the top end is provided with a buffer cavity arranged on the large surface of one side of the battery cell, and a mixed agent of a phosphoric acid tri (beta-chloroethyl) ester flame retardant and phase-change paraffin is injected into the buffer cavity.
The phase transition temperature of the phase transition paraffin is 50 ℃, and the mass ratio of the phosphoric acid tri (beta-chloroethyl) ester to the paraffin is 1: 1.5; the volume of the mixture was 85% of the volume of the buffer chamber.
The discharge mechanism is 6 discharge openings, 3 on the inner shell of the battery cell, 3 on the lower end and 0.6MPa of discharge pressure.
Example 4
A lithium ion battery with a buffer structure comprises a lithium ion cell; the lithium ion battery cell mainly comprises a tab battery cell and a buffer cavity.
The buffer cavity comprises shell and inner shell, the inner shell is equipped with discharge mechanism.
The opposite pole ear outlet battery cell is provided with buffer cavities on two large faces of the battery cell, and a mixture of trichloropropylphosphate flame retardant and phase-change paraffin is injected into the buffer cavities.
The phase-change temperature of the phase-change paraffin is 40 ℃, and the mass ratio of the phase-change paraffin to trichloropropylphosphate is 1: 2; the injected buffer volume is 90% of the buffer chamber volume.
The discharge mechanism is 4 discharge openings, and 2 are on the inner shell of the electric core, 2 are on the lower end, and the discharge pressure is 0.5 MPa.
Example 5
A lithium ion battery with a buffer structure comprises a lithium ion cell; the lithium ion battery cell mainly comprises a tab battery cell and a buffer cavity.
The buffer cavity is composed of an outer shell and an inner shell, and the inner shell is provided with a discharge mechanism.
The top end of the battery cell is provided with a lug, the buffer cavities of the battery cell are arranged on two large faces of the battery cell, and a mixture of trichloropropylphosphate flame retardant and phase-change paraffin is injected into the buffer cavities.
The phase-change temperature of the phase-change paraffin is 50 ℃, and the mass ratio of the phase-change paraffin to trichloropropylphosphate is 1: 2; the volume of injected buffer is 95% of the volume of the buffer chamber.
The discharge mechanism is 6 discharge openings, 3 on the inner shell of the battery cell, 3 on the lower end and 0.7MPa of discharge pressure.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. A lithium ion battery with a buffer structure is characterized in that: comprises a lithium ion cell; the lithium ion battery cell mainly comprises a battery cell main body and a buffer cavity;
the buffer cavity consists of an outer shell and an inner shell, and the inner shell is provided with a plurality of discharge mechanisms which are respectively arranged at the upper end and the lower end of the inner shell; the discharge mechanism is a discharge opening, and the discharge pressure of the discharge mechanism is (0.6-0.9) × a MPa, wherein a is the discharge pressure of the battery top cover pressure release valve;
the buffer cavity is arranged at a position according to the possible extrusion direction of the battery core; and a mixture of a liquid flame retardant and a normal-temperature solid phase-change material is injected into the buffer cavity.
2. The lithium ion battery with a buffer structure according to claim 1, wherein: the discharge direction of the discharge port rushes towards the interior of the battery cell.
3. The lithium ion battery with a buffer structure according to claim 1, wherein: the discharge pressure of the discharge port is more than 0.5 MPa.
4. The lithium ion battery with a buffer structure according to claim 3, wherein: the discharge pressure of the discharge port is lower than that of the cell top cover discharge port.
5. The lithium ion battery with a buffer structure according to claim 1, wherein: the buffer cavity is arranged at any side or multiple sides of the battery core except the side with the lug.
6. The lithium ion battery with a buffer structure according to claim 1, wherein: the phase change material is insoluble in the flame retardant and does not chemically react with the flame retardant.
7. The lithium ion battery with a buffer structure according to claim 1, wherein: the mass ratio of the phase-change material to the flame retardant is 1: 1-1: 2.
8. The lithium ion battery with a buffer structure according to claim 1, wherein: the phase change temperature of the phase change material is 25-65 ℃.
9. The lithium ion battery with a buffer structure according to claim 1, wherein: the thermal conductivity of the phase-change material is lower than 0.8W/m.K.
10. The lithium ion battery with a buffer structure according to claim 1, wherein: the volume of the mixing agent accounts for 80-95% of the volume of the buffer cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210271669.9A CN114725599A (en) | 2022-03-18 | 2022-03-18 | Lithium ion battery with buffer structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210271669.9A CN114725599A (en) | 2022-03-18 | 2022-03-18 | Lithium ion battery with buffer structure |
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| CN202210271669.9A Pending CN114725599A (en) | 2022-03-18 | 2022-03-18 | Lithium ion battery with buffer structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115207531A (en) * | 2022-08-24 | 2022-10-18 | 四川裕宁新能源材料有限公司 | Preparation method of flame-retardant battery |
| WO2024131986A1 (en) * | 2022-12-23 | 2024-06-27 | 蜂巢能源科技股份有限公司 | Battery and power apparatus |
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| CN113540612A (en) * | 2021-05-28 | 2021-10-22 | 清华大学 | Battery pack, phase change material layer quality determination method, device, equipment and medium |
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| CN104993188A (en) * | 2015-07-17 | 2015-10-21 | 广东万锦科技股份有限公司 | Highly-safe cylindrical battery temperature homogenizing module |
| CN205582974U (en) * | 2016-01-29 | 2016-09-14 | 广东精进能源有限公司 | Soft packet of lithium cell fire resistive construction |
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| CN212848528U (en) * | 2020-07-24 | 2021-03-30 | 天津市捷威动力工业有限公司 | Flame-retardant lithium ion battery component |
| CN113540612A (en) * | 2021-05-28 | 2021-10-22 | 清华大学 | Battery pack, phase change material layer quality determination method, device, equipment and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115207531A (en) * | 2022-08-24 | 2022-10-18 | 四川裕宁新能源材料有限公司 | Preparation method of flame-retardant battery |
| WO2024131986A1 (en) * | 2022-12-23 | 2024-06-27 | 蜂巢能源科技股份有限公司 | Battery and power apparatus |
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