CN116111242A - Lithium battery steel shell assembly and lithium battery comprising same - Google Patents
Lithium battery steel shell assembly and lithium battery comprising same Download PDFInfo
- Publication number
- CN116111242A CN116111242A CN202310201433.2A CN202310201433A CN116111242A CN 116111242 A CN116111242 A CN 116111242A CN 202310201433 A CN202310201433 A CN 202310201433A CN 116111242 A CN116111242 A CN 116111242A
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- Prior art keywords
- lithium battery
- steel shell
- riveting
- insulating plastic
- steel
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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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
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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
Abstract
The invention discloses a lithium battery steel shell component and a lithium battery comprising the same, wherein the steel shell component comprises a positive pole post, upper insulating plastic, a sealing ring, lower insulating plastic and a steel shell; the first end of the steel shell is provided with a through hole; the positive pole is arranged in the through hole of the steel shell in a penetrating way and is riveted with the outer edge of the through hole; the positive pole is in crimping connection with the upper insulating plastic, the steel shell, the sealing ring and the lower insulating plastic, and the sealing ring is compressed after being riveted. The invention creatively uses the external riveting mode, simplifies the design, eliminates the riveting block aiming at the design of the pole and the riveting block in the prior art, can realize the riveting effect by directly using the pole, saves the working procedures, improves the assembly efficiency, reduces the cost and improves the reliability of product riveting.
Description
Technical Field
The invention relates to the field of lithium battery design, in particular to a steel shell component of a lithium battery and the lithium battery comprising the same.
Background
Because the large cylindrical structure of the lithium battery steel shell in the current market mainly comprises a steel shell, a positive pole post, an upper insulating part, a sealing part, a lower insulating part and a riveting block, the positive pole post penetrates through the steel shell to string the upper insulating part, the sealing part, the lower insulating part and the riveting block together, the diameter of the riveting position of the positive pole post is enlarged through riveting of the positive pole post, and all parts are pressed on the riveting block to ensure the integral structural strength and sealing performance; for example, in patent CN 202111275820.8, a battery assembling method and a lithium battery are disclosed, wherein a positive electrode post includes an aluminum nail, the aluminum nail is inserted into a through hole of the first end, the aluminum nail has a rivet structure with cross-sectional areas of two ends larger than the diameter of the through hole, and the center of the aluminum nail is provided with the center hole; the positive electrode post further includes: the first insulating plate is arranged on the outer side of the shell, one end of the first insulating plate is abutted with one surface of the first end, which faces the outer side of the shell, and one end of the first insulating plate, which is far away from the first end, is abutted with the aluminum nails and is suitable for supporting the aluminum nails; the insulating pad is constructed to ladder cylindrical structure, set up in the aluminium nail first end reaches between the first insulating plate, the inner wall of insulating pad be suitable for with the outer wall looks butt of aluminium nail, the positive pole post still includes: the second insulation board and aluminium piece, the second insulation board set up in the inboard of casing, the one end of second insulation board be suitable for with first end orientation the inboard one side butt of casing, the second insulation board keep away from the one end of first end be suitable for through the aluminium piece with aluminium nail butt.
The riveting method disclosed in the above patent is internal riveting, so that aluminum blocks are required to be adopted for matching, so that the number of parts is relatively large, and the overall structure is complex.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a lithium battery steel shell component and a lithium battery comprising the same, and the design of a lithium battery pole enables the pole to also consider the function of a riveting block, thereby replacing the riveting block part and reducing the cost.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a steel shell assembly of a lithium battery, where the steel shell assembly includes a positive electrode post, an upper insulating plastic, a sealing ring, a lower insulating plastic, and a steel shell; the first end of the steel shell is provided with a through hole; the positive pole is arranged in the through hole of the steel shell in a penetrating way and is riveted with the outer edge of the through hole; the positive pole is in crimping connection with the upper insulating plastic, the steel shell, the sealing ring and the lower insulating plastic, and the sealing ring is compressed after being riveted.
The lithium battery steel shell component provided by the invention does not contain aluminum blocks, so that the assembly efficiency can be greatly improved while the parts are saved.
As a further technical scheme, the positive electrode post comprises a riveting part, a supporting part and a riveting base; the positive pole post is provided with a through hole in the middle, the riveting part is pressed on the upper insulating plastic, and the upper insulating plastic, the steel shell, the sealing ring and the lower insulating plastic are pressed between the riveting part and the riveting base.
As a further technical scheme, the thickness of the riveting part is smaller than that of the supporting part, and the two parts form steps on the inner wall surface.
As a further technical scheme, the external diameter of the riveting base is larger than the external diameters of the supporting part and the riveting part.
As a further technical scheme, the height L3 of the riveting base is more than or equal to 1mm and less than or equal to 3mm.
As a further technical scheme, a welding step is formed between the riveting part and the supporting part.
In a second aspect, the invention also provides a lithium battery, which comprises a winding core, wherein the winding core is arranged in the steel shell component.
As a further technical scheme, the lithium battery further comprises a positive current collector, the positive current collector is arranged at the positive end of the winding core and is electrically connected with the positive end of the winding core, and a transfer column is arranged at the center of the positive current collector and is connected with the through hole in a matched mode.
As a further technical scheme, the lithium battery further comprises a negative electrode current collector, wherein the negative electrode current collector is arranged at the negative electrode end of the winding core, fixedly connected with the negative electrode end of the winding core and fixedly connected with the inner wall of the steel shell.
As a further technical scheme, the lithium battery further comprises a negative electrode cover plate, wherein the negative electrode cover plate is fixedly connected with the opening end of the steel shell, which is far away from the first end, and is suitable for sealing the steel shell, and one side of the negative electrode cover plate, which faces the inside of the steel shell, is abutted to the negative electrode current collector and is suitable for supporting and fixing the winding core.
The beneficial effects of the embodiment of the invention are as follows:
the positive pole in the steel shell component adopts an external riveting mode, so that the design is simplified, the riveting block (aluminum block) is abandoned aiming at the design of the pole and the riveting block in the prior art, the riveting effect can be realized by directly using the positive pole, the working procedures are saved, the assembly efficiency is improved, the cost is reduced, and the product riveting reliability is improved.
The positive electrode post of the invention uses the structure design with different thickness to rivet the riveting part, and the riveting part is flattened to act as a riveting block, thereby replacing the part of the riveting block, saving the part, reducing the weight, saving the space of the riveting block and improving the volume utilization rate of the battery cell. The external riveting mode provided by the invention can omit aluminum blocks, and the internal riveting is often required to be provided with the aluminum blocks, so that the external riveting mode is used for creatively designing the structure, thereby saving parts and greatly improving the assembly efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is an exploded view of a cylindrical lithium battery according to the present invention;
FIG. 2 is a cross-sectional view of the steel shell assembly of the present invention taken together;
FIG. 3 is a schematic view of the steel shell assembly of the present invention prior to staking;
FIG. 4 is a schematic view of the riveted steel shell assembly of the present invention;
FIG. 5 is a schematic view of a positive electrode post of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 4 in accordance with the present invention;
FIG. 7 is a schematic view of a positive current collector of the present invention;
fig. 8 is a schematic view of the external appearance structure of the upper part of the cylindrical lithium battery after press riveting;
in the figure: 1 steel shell component, 2 sealing nails, 3 positive current collector, 4 winding core and 5 negative current collector; 6, a negative electrode cover plate; 101 positive pole post, 1011 riveting part, 1012 supporting part, 1013 riveting base, 1014 through hole, 1015 welding step; 102 upper insulating plastic, 103 sealing rings, 104 lower insulating plastic, 105 steel shell,
301 collector plate, 302 transfer column;
the length of the riveting part A and the length of the riveting base B;
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the present invention clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "upper", "lower", and "if used herein, merely denote an upper and lower direction consistent with the accompanying drawings, and do not limit the structure, but merely facilitate description of the invention and simplify description, without indicating or implying that the apparatus or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
As described in the background art, the present invention provides a cylindrical cell and a pole structure thereof in order to solve the above technical problems.
In a typical embodiment of the present invention, as shown in fig. 1, the present embodiment discloses a cylindrical lithium battery, which mainly comprises a steel shell component 1, a sealing nail 2 for a filling hole, a positive current collector 3, a winding core 4, a negative current collector 5 and a negative cover plate 6, as shown in fig. 1; one end of the winding core 4 is provided with the anode current collector 3, the opposite end is provided with the cathode current collector 5, the steel shell component 1 is sleeved on the outer ring of the winding core 4, one end of the steel shell component 1 is provided with the liquid injection hole sealing nail 2, the other end is matched with the cathode cover plate 6 to form a closed shell, and the anode current collector 3 is connected with the steel shell component 1.
Specifically, the steel shell component 1 is composed of a positive pole column 101, an upper insulating plastic 102, a sealing ring 103, a lower insulating plastic 104 and a steel shell 105; the positive pole column 101 is arranged in a through hole penetrating through the first end of the steel shell 105 in a penetrating way, the positive pole column 101 is of a rivet structure, the cross section area of two ends of the rivet structure is larger than the diameter of the through hole, and the center of the positive pole column 101 is provided with the center hole 1014; the central hole 1014 is matched with the transfer post 302 of the positive electrode current collector 3, and the transfer post 302 is matched with the injection hole sealing nail 2; the positive pole 101 rivets the upper insulating plastic 102, the sealing ring 103, the lower insulating plastic 104 and the steel shell 105 together, namely, the whole structure rivets all parts together through the positive pole 101, as shown in a schematic diagram before the positive pole is riveted in fig. 3, and as shown in a schematic diagram after the positive pole is riveted in fig. 4; the sealing ring 103 is compressed after riveting, and has a sealing effect on the whole structure; the upper insulating plastic 102 and the lower insulating plastic 104 respectively insulate the positive pole 101 from the steel shell 105, the steel shell 105 is pressed between the upper insulating plastic 102 and the lower insulating plastic 104, the inner ring of the sealing ring 103 is matched with the outer ring of the positive pole 101, and the outer ring of the sealing ring 103 is matched with the lower insulating plastic 104 and the steel shell 105.
Further, a ring of groove is formed on the top of the upper insulating plastic 102, and the riveting portion 1011 is pressed in the groove.
Further, the height of the inner ring of the seal ring 103 is higher than the height of the outer ring.
In particular, in order to secure the caulking performance of the positive electrode post, the positive electrode post 101 in the present embodiment is provided with a caulking portion 1011, a supporting portion 1012, and a caulking base 1013, while the middle position of the positive electrode post 101 is provided with a through hole 1014 along the axial direction thereof, as shown in fig. 4; wherein a step is formed between the caulking portion 1011 and the supporting portion 1012.
In particular, the thickness L1 of the caulking portion 1011 needs to be compatible with the feasibility of caulking, avoiding caulking cracking, and compatible with the feasibility of pack welding after caulking, so that L1 is preferably 0.8mm or less or 2.5mm or less;
the special supporting part 1012 plays a role in supporting the riveting, so that L2 is preferably more than or equal to 1.5mm and less than or equal to 3mm, and L1/L2 is less than 1, namely the thickness of the supporting part 1012 is larger than that of the riveting part 1011; if the caulking portion (1011) is not thinned, but is directly caulking according to the thickness L2 of the supporting portion (1012), the whole caulking is required to be flat due to the external caulking, so that the caulking outer ring is very easy to crack, and the workability and the yield of the external caulking are very low. That is, the external riveting of the present invention requires consideration of ductility of the whole material due to the stress of the whole material, so the present invention performs thinning treatment on the thickness L1 of the rivet portion (1011), and finally makes L1< L2.
In particular, the staking base 1013 also functions as a staking support and provides a structural seal by compressing the seal ring 103 from top to bottom with the steel can 105, preferably 1mm < L3 (height) < 3mm; and the inside diameter of the caulking base 1013 is equal to that of the supporting portion 1012, but the outside diameter of the caulking base 1013 is larger than that of the supporting portion 1012; since the outside diameter of the caulking portion 1011 is equal to the outside diameter of the supporting portion 1012 and the inside diameter of the caulking portion 1011 is larger than the inside diameter of the supporting portion 1012, a step is formed between the caulking portion 1011 and the supporting portion 1012.
Specifically, after the positive electrode post is riveted, a welding step 1015 is formed between the riveted portion 1011 and the top of the supporting portion, and the step width of the welding step 1015 is preferably 0.2mm < D1 < 2mm, and the step depth is preferably 0mm < D2 < 1mm, as shown in fig. 6.
Further, the length of the caulking portion (1011) is smaller than the length of the caulking base (1013), and referring to fig. 6, the length a of the caulking portion (1011) in fig. 6 is smaller than the length B of the caulking base (1013); the design is mainly because the riveting part (1011) is arranged at the upper part and the riveting base (1013) is arranged at the lower part, so the length of the riveting part (1011) is shorter than the length of the riveting base (1013).
Further, the 1014 is a through hole penetrating through the positive electrode post 101, and a hole wall of the through hole of the positive electrode post 101 is adapted to be fixedly connected with the adaptor post 302 below.
Optionally, the positive current collector 3 in this embodiment is a disc, and is composed of a current collecting disc 301 and a switching post 302, where the switching post 302 is located at the center of the current collecting disc 301; as shown in fig. 7, where current collecting plate 301 is point-connected to winding core 4, adapter post 302 mates with through hole 1014 of positive electrode post 101 and is point-connected, resulting in extraction of the winding core electrode to positive electrode post 101. Preferably, the positive electrode current collector 3 and the positive electrode post 101 are connected by laser welding or ultrasonic welding.
Optionally, the negative current collector 5 is also a disc, as shown in fig. 1, and the edge of the disc is locally thickened, so that the negative current collector is suitable for being connected with the winding core 4. The connection mode between the negative current collector 5 and the winding core 4 and the connection mode between the negative current collector and the inner wall of the steel shell 105 are laser welding.
Optionally, the connection mode between the negative cover plate 7 and the steel casing 105 is welding.
The cylindrical lithium battery provided in this embodiment (see fig. 8) is configured to electrically connect the positive electrode collector 3 to the positive electrode end of the winding core 4 and to the positive electrode end of the winding core 4, so as to realize current collection at the positive electrode ear of the positive electrode end of the winding core 4, to electrically connect the positive electrode end to the outside through the positive electrode collector 3 through the positive electrode collector 101 by providing the positive electrode post 101, to electrically connect the negative electrode collector 5 to the negative electrode end of the winding core 4 and to the negative electrode end of the winding core 4, so as to realize current collection at the negative electrode ear of the negative electrode end of the winding core 4, and to electrically connect the negative electrode collector 5 to the inner wall of the casing 4, so that the steel shell 105 is electrically connected to the negative electrode end of the winding core 4 through the negative electrode collector 6, so as to realize connection of the steel shell 105 as a battery to the outside circuit.
Finally, it is pointed out that relational terms such as first and second are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The lithium battery steel shell component is characterized by comprising a positive pole column (101), upper insulating plastic (102), a sealing ring (103), lower insulating plastic (104) and a steel shell (105);
a through hole is formed in the first end of the steel shell (105); the positive pole (101) penetrates through the through hole of the steel shell (105) and is riveted with the outer edge of the through hole; the positive pole (101) is characterized in that an upper insulating plastic (102), a steel shell (105), a sealing ring (103) and a lower insulating plastic (104) are pressed together, and the sealing ring (103) is compressed after being riveted.
2. The lithium battery steel can assembly according to claim 1, wherein the positive electrode post (101) comprises a rivet (1011), a support (1012) and a rivet base (1013); a through hole (1014) is arranged in the middle of the positive pole (101), the riveting part (1011) is pressed on the upper insulating plastic (102), and the upper insulating plastic (102), the steel shell (105), the sealing ring (103) and the lower insulating plastic (104) are pressed between the riveting part (1011) and the riveting base (1013).
3. The lithium battery steel can assembly according to claim 2, wherein the thickness of the caulking portion (1011) is smaller than the thickness of the supporting portion (1012), both of which form a step on the inner wall surface.
4. A lithium battery according to claim 3, characterized in that the outside diameter of the caulking base (1013) is larger than the outside diameters of the supporting portion (1012) and the caulking portion (1011).
5. The lithium battery steel can assembly according to claim 2, wherein the rivet portion (1011) has a length smaller than that of the rivet base (1013).
6. The lithium battery steel shell component according to claim 2, wherein a welding step (1015) is formed between the riveting part (1011) and the supporting part (1012).
7. A lithium battery, characterized by further comprising a winding core (4), wherein the winding core (4) is arranged in the lithium battery steel shell component according to any one of claims 1-6.
8. The lithium battery according to claim 7, further comprising a positive current collector (3) disposed at the positive end of the winding core (4) and electrically connected to the positive end of the winding core (4), wherein a transfer post 302 is disposed at the center of the positive current collector (3) and is cooperatively connected to the through hole (1014).
9. The lithium battery according to claim 7, further comprising a negative current collector (5) disposed at a negative end of the winding core (4), fixedly connected to the negative end of the winding core (4), and fixedly connected to an inner wall of the steel can (105).
10. The lithium battery according to claim 7, further comprising a negative cover plate (6), wherein the negative cover plate (6) is fixedly connected to the open end of the steel can (105) remote from the first end (41), adapted to seal the steel can (105), and wherein a side of the negative cover plate (6) facing the inside of the steel can (105) abuts against the negative current collector (5), adapted to support and fix the winding core (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310201433.2A CN116111242A (en) | 2023-02-28 | 2023-02-28 | Lithium battery steel shell assembly and lithium battery comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310201433.2A CN116111242A (en) | 2023-02-28 | 2023-02-28 | Lithium battery steel shell assembly and lithium battery comprising same |
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| CN116111242A true CN116111242A (en) | 2023-05-12 |
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| CN202310201433.2A Pending CN116111242A (en) | 2023-02-28 | 2023-02-28 | Lithium battery steel shell assembly and lithium battery comprising same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117374491A (en) * | 2023-12-07 | 2024-01-09 | 蜂巢能源科技股份有限公司 | Battery and electric equipment |
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2023
- 2023-02-28 CN CN202310201433.2A patent/CN116111242A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117374491A (en) * | 2023-12-07 | 2024-01-09 | 蜂巢能源科技股份有限公司 | Battery and electric equipment |
| CN117374491B (en) * | 2023-12-07 | 2024-02-20 | 蜂巢能源科技股份有限公司 | Battery and electric equipment |
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