CN219040548U - Square column battery and battery module - Google Patents
Square column battery and battery module Download PDFInfo
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- CN219040548U CN219040548U CN202222368431.6U CN202222368431U CN219040548U CN 219040548 U CN219040548 U CN 219040548U CN 202222368431 U CN202222368431 U CN 202222368431U CN 219040548 U CN219040548 U CN 219040548U
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Abstract
The utility model relates to the technical field of lithium ion batteries, in particular to a square column battery and a battery module, comprising a square column shell, a laminated square column battery core, a top cover plate, a base plate, a positive electrode tab and a negative electrode tab, wherein a containing cavity is formed in the square column shell; the laminated square column battery cell consists of a positive pole piece, a negative pole piece and a diaphragm, wherein the diaphragm is positioned between the positive pole piece and the negative pole piece and is used for keeping insulation between the positive pole piece and the negative pole piece, and the positive pole piece, the diaphragm and the negative pole piece are continuously laminated to form the laminated square column battery cell; the top cover plate is connected to one end of the square column shell; the bed plate is connected to one end of the square column shell, which is away from the top cover plate. The utility model has high safety coefficient.
Description
Technical Field
The utility model relates to the technical field of lithium ion batteries, in particular to a square column battery and a battery module.
Background
The cylindrical battery belongs to a winding production process, has higher production efficiency, adopts more forms for battery manufacture, and has the following defects:
(1) when the cylindrical battery is heated and swelled
The expansion pressure of each winding layer of the cylindrical battery core is different, the winding layer of the near winding core resists compression when being heated and expanded, the winding layer of the near excircle resists tension when being heated and expanded, the winding layer of the near winding core resists compression, the winding layer of the near excircle is easy to cause the membrane to be folded, the current collector is easy to stretch and deform, the folding position of the membrane is easy to cause short circuit due to mutual friction and breakage of the winding layers of the winding core in a vibration environment, the current collector is easy to stretch and deform, the coating of a pole piece is easy to peel off, capacity attenuation is caused, the stretching deformation caused by the membrane stretching can change the original aperture of the membrane, and the positive pole and negative pole short circuit can be caused when the original aperture of the membrane becomes large.
(2) The heat conduction performance of the cylindrical battery is poor
The heat conduction of the cylindrical battery core belongs to axial one-dimensional heat conduction, namely, the winding battery core conducts heat through the positive electrode tab and the negative electrode tab, because the cylindrical battery core is formed by a layer of positive electrode sheet, a layer of negative electrode sheet, a layer of diaphragm between the positive electrode sheet and the negative electrode sheet, the radial heat conduction of the cylindrical battery core is in a spiral winding structure from the circle center to the outer circle, the number of layers from the circle center to the outer circle exceeds hundred, the layers of the positive electrode sheet, the negative electrode sheet and the winding diaphragm are more than the layers, the coating layers of the positive electrode sheet and the negative electrode sheet belong to powder adhesive structure, the heat conduction coefficient of the diaphragm belongs to high polymer materials, the heat conduction coefficient is only 0.15w/m.k, and the heat conduction from the circle center of the winding battery core to the outer circle of the winding battery core is restrained by multi-layer thermal resistance through the layer winding negative electrode sheet, the winding positive electrode sheet and the winding diaphragm;
(3) uneven distribution of electrolyte
In the process of electrolyte injection, the radial direction of the winding cylindrical battery core belongs to a complete pole piece surrounding closed cylindrical surface, electrolyte injection is limited to the gap between the positive pole lug end and the negative pole lug end of the winding battery core, imbibition and diffusion of a diaphragm are distributed in the gap between the positive pole piece and the negative pole piece and the diaphragm, and the tension of each layer of the winding battery core is different, so that the permeation and diffusion resistance of electrolyte between the pole piece layers with smaller tension is smaller, the permeation and diffusion resistance between the pole piece layers with larger tension is larger, the tension of each layer of the winding battery core is different, the electrolyte distribution is uneven, the internal resistance distribution difference of the cylindrical battery can be caused by the uneven electrolyte distribution, the internal resistance of a barren solution area is larger, the internal resistance of a rich solution area is smaller, and finally the consistency of the cylindrical battery is poor.
(4) Dendrite formation risk exists due to tension difference of layers of winding battery core
Another significant drawback of cylindrical batteries is that the electrolyte always flows to the interlayer region of the pole piece with lower temperature and lower tension after the tension difference of each layer of the wound battery core is heated, expanded and cooled, so that the electrolyte is excessive in the region with lower temperature; the continuous temperature between the pole piece layers with larger tension is higher, the electrolyte is gradually reduced, the electrolyte is continuously reduced in the repeated cold-hot alternating process of the lithium battery, partial electrolyte is dried up, the internal resistance of the partial electrolyte is obviously increased, and the heating is aggravated, so that the method is one of the main reasons for capacity attenuation of the lithium battery. Secondly, the partial electrolyte between the electrode plate layers with lower temperature and lower tension is excessive, and the excessive electrolyte is easy to form ice crystals in a low-temperature environment; after the electrolyte distributed between the positive electrode and the negative electrode forms ice crystals, the electrolyte of the ice crystals is easy to form dendrites between the positive electrode and the negative electrode during charging, and the dendrites can directly trigger short circuit, so that the electrolyte is one of the causes of ignition and explosion of the lithium battery. The existing lithium battery is charged at low temperature, and the risk belongs to the characteristic defect of the lithium battery.
The existing rectangular lithium battery mainly adopts a flat square structure, a rectangular lithium battery cell of the flat square structure adopts a winding process, a pole piece plane direction and a thickness direction of the rectangular lithium battery cell of the flat square structure adopt a lamination process, the dimension of the pole piece plane direction is larger than that of the thickness direction by 10 times to tens times, the larger the dimension of the plane direction is, the larger the heat dissipation conduction distance of a pole piece current collector of the lithium battery cell is, the lower the heat transfer efficiency is, although the thickness of the rectangular lithium battery is reduced by some technologies so as to obtain the effect of improving the heat transfer efficiency, the heat dissipation of the rectangular lithium battery in the thickness direction needs to pass through a layer of negative pole piece, a layer of positive pole piece, a layer of negative pole piece and a layer of diaphragm, and the effect of the thickness reduction of the rectangular lithium battery is not obvious on improving the heat dissipation efficiency due to the low powder adhesive structure coating of the negative pole piece and the positive pole piece.
The method overcomes the defects that the tensile strength is realized when the near-excircle winding layer is heated and expanded and the near-winding core winding layer is pressed when the near-excircle winding layer is heated and expanded and the electrolyte is redistributed caused by high-low temperature change, improves the heat dissipation conduction distance of the pole piece current collector of the traditional rectangular lithium battery, and has lower heat transfer efficiency, and has positive significance for improving the safety and reliability of the lithium battery.
Disclosure of Invention
In order to solve the problems, the utility model provides a square column-shaped laminated battery cell with expansion pressure difference of each winding layer of a cylindrical battery cell, compression resistance of a near-winding core winding layer when the near-winding core winding layer is heated and expanded, and tensile defect of the near-excircle winding layer when the near-winding core winding layer is heated and expanded, wherein the square column-shaped laminated battery cell is formed by matching and assembling square column-shaped shells to form a square column battery and a battery module of a square column lithium battery.
The technical scheme adopted by the utility model is as follows: the square column battery comprises a square column shell, a laminated square column battery core, a top cover plate, a base plate, a positive electrode tab and a negative electrode tab, wherein an accommodating cavity is formed in the square column shell; the laminated square column battery cell consists of a positive pole piece, a negative pole piece and a diaphragm, wherein the diaphragm is positioned between the positive pole piece and the negative pole piece and is used for keeping insulation between the positive pole piece and the negative pole piece, and the positive pole piece, the diaphragm and the negative pole piece are continuously laminated to form the laminated square column battery cell; the top cover plate is connected to one end of the square column shell; the base plate is connected to one end of the square column shell, which is away from the top cover plate; the positive electrode tab extends from the positive electrode plate, the top cover plate is provided with a positive electrode terminal, and the positive electrode terminal is connected with the positive electrode tab; the negative electrode tab extends from the negative electrode plate, the base plate is provided with a negative electrode terminal, and the negative electrode terminal is connected with the negative electrode tab.
The scheme is further improved in that the square column shell is provided with a square column cavity body consisting of four square corners and four side plates with equal side length.
The scheme is further improved in that the square column shell is provided with a square column cavity body consisting of four arc angles and four side plates with equal side length.
The technical scheme is further improved in that the inner wall of the accommodating cavity is tightly attached to the side face of the laminated square column cell, and the outer side face of the square column shell, which is positioned on the inner wall, is provided with a heat transfer surface.
The technical scheme is further improved in that the positive pole piece consists of a positive pole material of a lithium ion battery, a positive pole current collector and an adhesive, and the positive pole current collector is aluminum foil.
The technical scheme is further improved in that the negative electrode plate consists of a lithium ion negative electrode material, a negative electrode current collector and an adhesive, and the negative electrode current collector is copper foil.
The technical scheme is further improved in that a positive electrode insulating isolation pad is arranged between the top cover plate and the laminated square column cell, and a negative electrode insulating isolation pad is arranged between the base plate and the laminated square column cell.
The technical scheme is further improved in that an insulating sealing ring is arranged between the positive electrode terminal and the top cover plate and used for keeping sealing and insulating between the positive electrode terminal and the top cover plate.
A battery module comprises the square column battery.
The technical scheme is further improved in that the outer side face of the square column shell is connected with a fluid temperature control heat conduction pipe, and the side face of the square column shell is a lamination face of a lamination square column cell.
The beneficial effects of the utility model are as follows:
compared with the existing battery structure, the utility model aims at the existing defects of the lithium battery, and provides the square column-shaped laminated battery cell which is used for avoiding the difference of expansion pressure of each winding layer of the cylindrical battery cell when the cylindrical battery cell is heated and expanded, the compression resistance of the winding layer of the near winding core when the winding layer of the near winding core is heated and expanded and the tensile defect when the winding layer of the near excircle is heated and expanded, and the square column-shaped laminated battery cell is formed by matching and assembling square column-shaped shells. Group application of square column lithium batteries of the second aspect; the square column type shell is closely attached to the fluid temperature control heat conduction pipe, and the fluid temperature control heat conduction pipe Guan Naliu is communicated with hot fluid or cold fluid; in cold seasons, charging in the state of electrolyte of ice crystals is avoided, and a fluid temperature control heat conduction pipe flows hot fluid to enable the electrolyte of the ice crystals to be melted; in a high-temperature environment, in order to avoid the thermal expansion of the battery core, the fluid temperature control heat conduction pipe flows cold fluid, so that the square column lithium battery with the temperature rising is cooled, and the square column battery and the battery module are realized. The battery pack comprises a square column shell, a laminated square column battery core, a top cover plate, a base plate, a positive electrode lug and a negative electrode lug, wherein an accommodating cavity is formed in the square column shell; the laminated square column battery cell consists of a positive pole piece, a negative pole piece and a diaphragm, wherein the diaphragm is positioned between the positive pole piece and the negative pole piece and is used for keeping insulation between the positive pole piece and the negative pole piece, and the positive pole piece, the diaphragm and the negative pole piece are continuously laminated to form the laminated square column battery cell; the top cover plate is connected to one end of the square column shell; the base plate is connected to one end of the square column shell, which is away from the top cover plate; the positive electrode tab extends from the positive electrode plate, the top cover plate is provided with a positive electrode terminal, and the positive electrode terminal is connected with the positive electrode tab; the negative electrode tab extends from the negative electrode plate, the base plate is provided with a negative electrode terminal, and the negative electrode terminal is connected with the negative electrode tab. The opposite sides of the square column shell are tightly adhered to the stacking ends of the pole pieces of the laminated square column electric core, so that the heat generated by the laminated square column electric core has higher conduction efficiency through the aluminum foil or copper foil of the pole piece current collector of the square column electric core.
The opposite edges of the square column shell are tightly attached to the pole piece planes of the laminated square column battery cells, when the laminated square column battery cells are heated and expanded, the pole piece plane pressure intensity of the laminated square column battery cells is approximately equal, compared with the cylindrical battery cells, the expansion pressure intensity of each winding layer of the cylindrical battery cells is different, the winding layers of the near-winding cores are resistant to compression when heated and expanded, and the problem of tensile when the winding layers of the near-excircle are heated and expanded is solved. The problems of membrane wrinkles, membrane and current collector stretching deformation are avoided, and the safety, capacity and discharge performance stability of the battery are improved.
Drawings
FIG. 1 is a schematic side view of a prismatic battery of the present utility model;
FIG. 2 is a cross-sectional view of A-A of FIG. 1;
FIG. 3 is an enlarged schematic view of FIG. 2 at A;
FIG. 4 is an enlarged schematic view of FIG. 2B;
fig. 5 is a side view schematically showing a battery module according to the present utility model;
fig. 6 is a schematic top view of the battery module according to the present utility model.
Reference numerals illustrate: square column casing 1, accommodation cavity 11, lamination square column cell 2, positive pole piece 21, negative pole piece 22, diaphragm 23, top cover plate 3, positive terminal 31, insulating sealing ring 311, positive insulating spacer 32, negative insulating spacer 33, base plate 4, negative terminal 41, positive pole tab 5, negative pole tab 6, fluid temperature control heat pipe 7.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1 to 6, a square column battery is provided with a square column shell 1, a laminated square column cell 2, a top cover plate 3, a base plate 4, a positive electrode tab 5 and a negative electrode tab 6, wherein a containing cavity 11 is formed in the square column shell 1; the laminated square column battery cell 2 consists of a positive pole piece 21, a negative pole piece 22 and a diaphragm 23, wherein the diaphragm 23 is positioned between the positive pole piece 21 and the negative pole piece 22 and is used for keeping insulation between the positive pole piece 21 and the negative pole piece 22, and the positive pole piece 21, the diaphragm 23 and the negative pole piece 22 are continuously laminated to form the laminated square column battery cell 2; the top cover plate 3 is connected to one end of the square column shell 1; the base plate 4 is connected to one end of the square column shell 1, which is away from the top cover plate 3; the positive electrode tab 5 extends from the positive electrode plate 21, the top cover plate 3 is provided with a positive electrode terminal 31, and the positive electrode terminal 31 is connected with the positive electrode tab 5; the negative electrode tab 6 extends from the negative electrode tab 22, and the base plate 4 has a negative electrode terminal 41, and the negative electrode terminal 41 is connected to the negative electrode tab 6.
The square column shell 1 is provided with a square column cavity body consisting of four square corners and four side plates with equal side length; has better compressive rigidity and compressive strength.
The square column shell 1 is provided with a square column cavity body consisting of four arc angles and four side plates with equal side length, and has better compressive rigidity and compressive strength similar to the embodiment. Furthermore, the square column shell 1 is made of metal material stainless steel or aluminum, and the structure is reliable.
The inner wall of the accommodating cavity 11 is tightly attached to the side face of the laminated square column cell 2, and the outer side face of the square column shell 1 positioned on the inner wall is provided with a heat transfer surface to concentrate heat on the side face so as to conduct heat or dissipate heat rapidly.
The smaller the pole piece width of the laminated square column battery cell 2 is, the smaller the heat dissipation conduction distance of the pole piece current collector of the battery cell is, and the higher the heat transfer efficiency is, the technical scheme adopts the pole piece width of the laminated square column battery cell 2 to be 50 mm-100 mm, the size of the laminated square column battery cell 2 to be 50 mm-100 mm and the height to be 80 mm-100 mm.
The pole piece plane pressure of the laminated square column battery core 2 is approximately equal, and compared with the cylindrical battery core, the expansion pressure of each winding layer of the cylindrical battery core is different, the winding layer of the near winding core is resistant to compression when being heated and expanded, and the problem of tensile when the winding layer of the near excircle is heated and expanded is overcome.
The positive plate 21 consists of a positive electrode material of a lithium ion battery, a positive electrode current collector and an adhesive, wherein the positive electrode current collector is aluminum foil; the lithium ion battery anode material comprises ternary systems such as lithium cobaltate, lithium manganate, lithium iron phosphate, nickel Cobalt Manganese (NCM), nickel Cobalt Aluminum (NCA) and the like. The adhesive mainly comprises polyvinylidene fluoride (PVDF) component.
The negative electrode plate 22 is composed of a lithium ion negative electrode material, a negative electrode current collector and an adhesive, wherein the negative electrode current collector is copper foil; the lithium ion battery cathode material comprises natural graphite, artificial graphite, mesophase carbon microspheres and lithium titanate or silicon carbon cathodes; the adhesive is hydroxymethyl cellulose (CMC) or styrene-butadiene latex adhesive (SBR latex adhesive).
The membrane 23 is a microporous membrane 23 made of polyvinylidene fluoride (PVDF) as a bulk polymer, and polyethylene and polypropylene.
An anode insulating isolation pad 32 is arranged between the top cover plate 3 and the laminated square column cell 2, and a cathode insulating isolation pad 33 is arranged between the base plate 4 and the laminated square column cell 2.
An insulating sealing ring 311 is arranged between the positive terminal 31 and the top cover plate 3, and the insulating sealing ring 311 is used for keeping sealing and insulating between the positive terminal 31 and the top cover plate 3.
Referring to fig. 5 to 6, a battery module includes the prismatic battery; the outer side surface of the square column shell 1 is connected with a fluid temperature control heat conduction pipe 7, and the side surface of the square column shell 1 is a lamination surface of the lamination square column battery cell 2; the heat generated by the laminated square column cell 2 has higher conduction efficiency through the pole piece current collector aluminum foil or copper foil of the square column cell, compared with the cylindrical cell, the cylindrical cell belongs to axial one-dimensional heat conduction, the laminated square column cell 2 belongs to two-dimensional heat conduction, namely, the negative pole current collector copper foil negative pole tab 6 is connected with the base plate 4 to form an electric conduction and heat conduction structure, and the positive pole current collector aluminum foil positive pole tab 5 is connected with the top cover plate 3 to form an electric conduction and heat conduction structure.
The utility model provides a square column lamination cell capable of avoiding the tensile defect of a near-cylindrical winding layer when the near-cylindrical winding layer is heated and expanded, wherein the square column lamination cell is formed by matching and assembling square column shells when the cylindrical cell is heated and expanded, and the expansion pressure of each winding layer of the cylindrical cell is different according to the existing defect of the lithium cell. Group application of square column lithium batteries of the second aspect; the square column type shell is closely attached to the fluid temperature control heat conduction pipe 7, and hot fluid or cold fluid flows in the fluid temperature control heat conduction pipe 7; in cold seasons, charging in the state of electrolyte of ice crystals is avoided, and the fluid temperature control heat conduction pipe 7 circulates hot fluid to melt the electrolyte of the ice crystals; in a high-temperature environment, in order to avoid the thermal expansion of the battery core, the fluid temperature control heat conduction pipe 7 circulates cold fluid to cool the square column lithium battery with excessively high temperature, so that the square column battery and the battery module are realized. The battery pack is characterized by comprising a square column shell 1, a laminated square column battery core 2, a top cover plate 3, a base plate 4, a positive electrode tab 5 and a negative electrode tab 6, wherein an accommodating cavity 11 is formed in the square column shell 1; the laminated square column battery cell 2 consists of a positive pole piece 21, a negative pole piece 22 and a diaphragm 23, wherein the diaphragm 23 is positioned between the positive pole piece 21 and the negative pole piece 22 and is used for keeping insulation between the positive pole piece 21 and the negative pole piece 22, and the positive pole piece 21, the diaphragm 23 and the negative pole piece 22 are continuously laminated to form the laminated square column battery cell 2; the top cover plate 3 is connected to one end of the square column shell 1; the base plate 4 is connected to one end of the square column shell 1, which is away from the top cover plate 3; the positive electrode tab 5 extends from the positive electrode plate 21, the top cover plate 3 is provided with a positive electrode terminal 31, and the positive electrode terminal 31 is connected with the positive electrode tab 5; the negative electrode tab 6 extends from the negative electrode tab 22, and the base plate 4 has a negative electrode terminal 41, and the negative electrode terminal 41 is connected to the negative electrode tab 6. The opposite edges of the square column shell 1 are tightly adhered to the stacking ends of the pole pieces of the laminated square column electric core 2, so that the heat generated by the laminated square column electric core 2 has higher conduction efficiency through the pole piece current collector aluminum foil or copper foil of the square column electric core, compared with a cylindrical electric core, the cylindrical electric core belongs to axial one-dimensional heat conduction, the laminated square column electric core 2 belongs to two-dimensional heat conduction, namely, the negative electrode current collector copper foil negative electrode lug 6 is connected with the base plate 4 to form an electric conduction and heat conduction structure, and the positive electrode current collector aluminum foil positive electrode lug 5 is connected with the top cover plate 3 to form an electric conduction and heat conduction structure.
The opposite sides of the square column shell 1 are tightly attached to the pole piece planes of the laminated square column battery core 2, when the laminated square column battery core 2 is heated and expanded, the pole piece plane pressure intensity of the laminated square column battery core is approximately equal, compared with a cylindrical battery core, the expansion pressure intensity of each winding layer of the cylindrical battery core is different, the near-winding core winding layer resists compression when heated and expands, and the problem of tensile when the near-excircle winding layer is heated and expanded is overcome. The problems of the folding of the diaphragm 23, the drawing and stretching deformation of the diaphragm 23 and the current collector are avoided, and the safety, the capacity and the discharge performance stability of the battery are improved.
The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A square column battery, characterized in that: comprising
The square column shell is internally provided with a containing cavity;
the laminated square column battery cell consists of a positive pole piece, a negative pole piece and a diaphragm, wherein the diaphragm is positioned between the positive pole piece and the negative pole piece and is used for keeping insulation between the positive pole piece and the negative pole piece, and the positive pole piece, the diaphragm and the negative pole piece are continuously laminated to form the laminated square column battery cell;
the top cover plate is connected to one end of the square column shell;
the base plate is connected to one end of the square column shell, which is away from the top cover plate;
the positive electrode tab extends from the positive electrode plate, the top cover plate is provided with a positive electrode terminal, and the positive electrode terminal is connected with the positive electrode tab;
the negative electrode tab extends from the negative electrode plate, the base plate is provided with a negative electrode terminal, and the negative electrode terminal is connected with the negative electrode tab.
2. The prismatic battery according to claim 1, wherein: the square column shell is provided with a square column cavity body consisting of four square corners and four side plates with equal side length.
3. The prismatic battery according to claim 1, wherein: the square column shell is provided with a square column cavity body consisting of four arc angles and four side plates with equal side length.
4. The prismatic battery according to claim 1, wherein: the inner wall of the accommodating cavity is tightly attached to the side face of the laminated square column cell, and a heat transfer surface is formed on the outer side face of the square column shell, which is positioned on the inner wall.
5. The prismatic battery according to claim 1, wherein: the positive current collector is aluminum foil.
6. The prismatic battery according to claim 5, wherein: the negative current collector is copper foil.
7. The prismatic battery according to claim 1, wherein: an anode insulating isolation pad is arranged between the top cover plate and the laminated square column cell, and a cathode insulating isolation pad is arranged between the base plate and the laminated square column cell.
8. The prismatic battery according to claim 1, wherein: an insulating sealing ring is arranged between the positive terminal and the top cover plate and used for keeping sealing and insulating between the positive terminal and the top cover plate.
9. A battery module, characterized in that: a prismatic battery comprising any of the claims 1-8.
10. The battery module according to claim 9, wherein: the outer side face of the square column shell is connected with a fluid temperature control heat conduction pipe, and the side face of the square column shell is a lamination face of the lamination square column battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222368431.6U CN219040548U (en) | 2022-09-06 | 2022-09-06 | Square column battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222368431.6U CN219040548U (en) | 2022-09-06 | 2022-09-06 | Square column battery and battery module |
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| Publication Number | Publication Date |
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| CN219040548U true CN219040548U (en) | 2023-05-16 |
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| CN202222368431.6U Active CN219040548U (en) | 2022-09-06 | 2022-09-06 | Square column battery and battery module |
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| CN (1) | CN219040548U (en) |
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2022
- 2022-09-06 CN CN202222368431.6U patent/CN219040548U/en active Active
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