Side plate of battery monomer and battery monomer with same

Abstract

The utility model discloses a side plate of a battery monomer and the battery monomer with the side plate. The battery monomer comprises a shell, an electrode assembly and a cover plate, the cover plate covers one side of the shell, the electrode assembly and the side plate are arranged in the shell, the side plate, the shell, the cover plate and the electrode assembly are matched to define an exhaust channel, an anti-explosion valve is arranged on the cover plate, the side plate comprises a first plate and a second plate, and the first plate extends in the first direction; the second plate extends in a second direction. According to the side plate of the single battery disclosed by the embodiment of the utility model, when the single battery is subjected to thermal runaway, gas generated in the single battery can flow to the position of the anti-explosion valve through the first channel section and the second channel section of the exhaust channel, so that the gas in the single battery is quickly converged to the position of the anti-explosion valve; and the air is discharged to the outside of the single battery through the anti-explosion valve. The side plate formed by the first plate and the second plate is of a U-shaped structure or an L-shaped structure, so that the side plate of the battery monomer is prevented from moving, and the emission rate of gas in the battery monomer is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a side plate of a battery cell and a battery cell having the side plate. Background Art

[0002] Related technologies point out that the side panels are all flat, and the electrode group generally has only one side with a side panel. The battery cells have relatively few air passages and the structural strength is relatively weak. The side panels and other components are connected by hot melt and adhesive, which is easy to move and has a poor protection effect on the battery cells. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a side plate of a battery cell, wherein the side plate of the battery cell can allow the gas generated in the battery cell to flow to the explosion-proof valve position through the first channel section and the second channel section of the exhaust channel when the battery cell has thermal runaway, so that the gas inside the battery cell quickly converges to the explosion-proof valve and is discharged to the outside of the battery cell through the explosion-proof valve. The side plate composed of the first plate and the second plate is a U-shaped structure or an L-shaped structure, which prevents the side plate of the battery cell from moving, thereby increasing the gas discharge rate inside the battery cell.

[0004] The utility model also provides a battery cell having the side plate of the battery cell.

[0005] According to the side plate of the battery cell of the first aspect of the embodiment of the utility model, the battery cell includes a shell, an electrode assembly and a cover plate, the cover plate is arranged on one side of the shell, the electrode assembly and the side plate are arranged in the shell, the side plate, the shell, the cover plate and the electrode assembly cooperate to define an exhaust channel, an explosion-proof valve is provided on the cover plate, and the side plate includes: a first plate, the first plate extends along a first direction; a second plate, the second plate extends along a second direction, the second plate is connected to one end of the first plate in the first direction, and the second plate is arranged on a side of the electrode assembly facing the cover plate, and the first direction is perpendicular to the second direction.

[0006] According to the side plate of the battery cell of the embodiment of the utility model, the side plate has a first plate extending in a first direction and a second plate extending in a second direction, and the second plate is arranged on the side of the electrode assembly facing the cover plate, and the electrode assembly, the shell and the first plate cooperate to define the first channel section of the exhaust channel, the first channel section extends in the left-right direction, and the electrode assembly, the second plate, the cover plate assembly and the shell form a second channel section of the exhaust channel, the second channel section extends in the up-down direction, the first channel section is connected to the second channel section, and the side plate forms an exhaust channel located on the side where the cover plate is located between the shell and the electrode assembly. When the battery cell has thermal runaway, the gas generated in the battery cell can flow to the explosion-proof valve position through the first channel section and the second channel section of the exhaust channel, so that the gas inside the battery cell quickly converges to the explosion-proof valve and is discharged to the outside of the battery cell through the explosion-proof valve. The second plate is connected to one end of the first plate in the first direction. The side plate of the battery cell formed by the first plate and the second plate is a U-shaped structure or an L-shaped structure, and the shell and the electrode assembly can limit the movement of the first plate. At the same time, the shell, the electrode assembly and the cover plate assembly limit the movement of the second plate to prevent the side plate of the battery cell from moving, thereby increasing the internal gas discharge rate of the battery cell.

[0007] According to some embodiments of the present invention, the number of the first plates is two, and the two first plates are respectively connected to two ends of the second plate in the second direction.

[0008] According to some embodiments of the present invention, a tab avoidance hole is formed on the second plate and passes through the second plate along the first direction.

[0009] According to some embodiments of the present invention, the first plate is connected to the second plate by welding, bonding or clamping; or, the first plate and the second plate are integrally formed.

[0010] According to some embodiments of the utility model, the first plate includes: a first section and a second section, the number of the first section and the number of the second section are both multiple, the multiple first sections and the multiple second sections are alternately arranged in the first direction and connected in sequence, wherein in a third direction perpendicular to the first direction and the second direction, the width of the first section is greater than the width of the second section, and both side edges of the first section in the third direction exceed both side edges of the second section in the third direction.

[0011] According to some embodiments of the utility model, in the third direction, the width of the electrode assembly is the pole group width, the width of the first segment is the first width, and the width of the second segment is the second width, wherein the pole group width is at least 1 mm greater than the first width, and the first width and the second width are both greater than or equal to 3 mm.

[0012] According to some embodiments of the present invention, in the second direction, the thickness of the first plate is greater than or equal to 0.2 mm.

[0013] According to the battery cell of the embodiment of the second aspect of the utility model, the battery cell includes: a shell; a cover plate, the cover plate is arranged on one side of the shell in the first direction, and an explosion-proof valve is provided on the cover plate; an electrode assembly, the electrode assembly is arranged in the shell; according to the side plate of the battery cell of the embodiment of the first aspect of the utility model, the first plate is arranged between the electrode assembly and the shell, and the second plate is located between the electrode assembly and the cover plate.

[0014] According to the battery cell of the second embodiment of the utility model, the side plate has a first plate extending in a first direction and a second plate extending in a second direction, and the second plate is arranged on the side of the electrode assembly facing the cover plate, and the electrode assembly, the shell and the first plate cooperate to define the first channel section of the exhaust channel, the first channel section extends in the left-right direction, the electrode assembly, the second plate, the cover plate assembly and the shell form a second channel section of the exhaust channel, the second channel section extends in the up-down direction, the first channel section is connected to the second channel section, and the side plate forms an exhaust channel located on the side where the cover plate is located between the shell and the electrode assembly. When the battery cell has thermal runaway, the gas generated in the battery cell can flow to the cover plate position through the first channel section and the second channel section of the exhaust channel, and the explosion-proof valve is located on the cover plate, so that the gas inside the battery cell quickly converges to the explosion-proof valve and is discharged to the outside of the battery cell through the explosion-proof valve. The second plate is connected to one end of the first plate in the first direction, and the side plate of the battery cell formed by the first plate and the second plate is a U-shaped structure or an L-shaped structure, and the shell and the electrode assembly can limit the movement of the first plate. At the same time, the shell, the electrode assembly and the cover plate assembly limit the movement of the second plate to prevent the side plate of the battery cell from moving, thereby increasing the gas discharge rate inside the battery cell, thereby extending the service life of the battery cell and improving the quality of the battery cell.

[0015] According to some embodiments of the present invention, the battery cell further includes: an insulating sheet, the insulating sheet is coated on the outer sides of the electrode assembly and the side plate, and the side plate is thermally melt-connected to the insulating sheet.

[0016] According to some embodiments of the utility model, one side of the shell is open, and the battery cell also includes a cover plate assembly, which is arranged on the open side of the shell, and the cover plate assembly includes a lower insulating member, wherein in the first direction, the second plate abuts between the lower insulating member and the electrode assembly.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded view of a battery cell according to some embodiments of the present utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the electrode assembly, side plate, cover plate assembly and end plate in FIG.

[0020] Figure 3 yes Figure 2 A front view of a battery cell in which a side plate is mounted on the battery cell;

[0021] Figure 4 yes Figure 2 A schematic diagram of a cover plate assembly, an end plate and a side plate of a battery cell;

[0022] Figure 5 yes Figure 4 A front view of a side plate of a battery cell;

[0023] Figure 6 yes Figure 4 A top view of a side plate of a battery cell;

[0024] Figure 7 yes Figure 4 A side view of a side plate of a battery cell.

[0025] Reference numerals:

[0026] 1000, battery cell; 100, side plate; 10, first plate; 11, first section; 12, second section; 13, positioning hole; 20, second plate; 21, tab avoidance hole; 300, shell; 400, insulating sheet; 500, cover plate assembly; 510, lower insulating member; 600, end plate; 700, top patch; 800, insulating blue film; 900, electrode assembly. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] Refer to the following Figure 1-Figure 7 The side plate 100 of the battery cell 1000 according to the first embodiment of the present invention is described.

[0029] According to the side plate 100 of the battery cell 1000 of the first embodiment of the present invention, the battery cell 1000 includes a housing 300, an electrode assembly 900 and a cover plate.

[0030] Specifically, the cover plate is disposed on one side of the housing 300, the electrode assembly 900 and the side plate 100 are disposed in the housing 300, the side plate 100, the housing 300, the cover plate and the electrode assembly 900 cooperate to define an exhaust passage, an explosion-proof valve is disposed on the cover plate, and the side plate 100 includes a first plate 10 and a second plate 20, the first plate 10 is disposed along a first direction (e.g. Figure 1 The second plate 20 extends along the second direction (eg Figure 2 The second plate 20 extends in the up-down direction as shown, the second plate 20 is connected to one end of the first plate 10 in the first direction, and the second plate 20 is arranged on a side of the electrode assembly 900 facing the cover plate, and the first direction is perpendicular to the second direction.

[0031] Reference Figure 1 As shown, the first plate 10 is located between the electrode assembly 900 and the shell 300, and the first plate 10 extends in the left-right direction. The electrode assembly 900, the shell 300 and the first plate 10 cooperate to define a first channel section of the exhaust channel, and the first channel section extends in the left-right direction. The second plate 20 extends in the up-down direction. The cover plate assembly 500 includes a cover plate and a lower insulating member 510. The cover plate assembly 500 extends in the up-down direction. The cover plate assembly 500 is located on the right side of the second plate 20. A second channel section of the exhaust channel is formed between the electrode assembly 900, the second plate 20, the cover plate assembly 500 and the shell 300. The second channel section extends in the up-down direction, and the first channel section is connected to the second channel section.

[0032] When thermal runaway occurs in the battery cell 1000, the gas generated in the battery cell 1000 can flow to the explosion-proof valve position through the first channel section and the second channel section of the exhaust channel, so that the gas inside the battery cell 1000 quickly gathers at the explosion-proof valve and is discharged to the outside of the battery cell 1000 through the explosion-proof valve. Since the side plate 100 is formed with an exhaust channel located on the side where the explosion-proof valve is located between the housing 300 and the electrode assembly 900, the gas can be further accelerated to gather at the explosion-proof valve, thereby increasing the gas discharge speed.

[0033] The first plate 10 is located between the housing 300 and the electrode assembly 900, and the first plate 10 extends in the left-right direction, for example Figure 1As shown, in the up-down direction, the first plate 10 abuts between the electrode assembly 900 and the shell 300, and the shell 300 and the electrode assembly 900 can limit the movement of the first plate 10. The second plate 20 is located between the cap plate assembly 500 and the electrode assembly 900, and the second plate 20 extends in the up-down direction, for example, the second plate 20 abuts between the electrode assembly 900 and the cap plate assembly 500, and the electrode assembly 900 and the cap plate assembly 500 can limit the movement of the second plate 20.

[0034] For example Figure 1 As shown, the second plate 20 is connected to the right end of the first plate 10, and the side plate 100 of the battery cell 1000 formed by the first plate 10 and the second plate 20 is a U-shaped structure or an L-shaped structure. Since the first plate 10 is clamped between the housing 300 and the electrode assembly 900 in the up-down direction, and the second plate 20 is clamped between the electrode assembly 900 and the cover plate assembly 500 in the left-right direction, the side plate 100 can be limited in multiple directions, effectively preventing the side plate 100 of the battery cell 1000 from moving, thereby increasing the internal gas discharge rate of the battery cell 1000.

[0035] According to the side plate 100 of the battery cell 1000 of the embodiment of the utility model, the side plate 100 has a first plate 10 extending in a first direction and a second plate 20 extending in a second direction, and the second plate 20 is arranged on the side of the electrode assembly 900 facing the cover plate, so that the exhaust channel not only has a first channel section extending in the length direction of the shell 300, but also has a second channel section extending in the width direction of the shell 300, and the second channel section is connected to the explosion-proof valve position, thereby, the gas inside the battery cell 1000 is directly guided to the explosion-proof valve position through the exhaust channel, quickly converges to the explosion-proof valve, and finally discharged to the outside of the battery cell 1000 through the explosion-proof valve. In addition, the side plate 100 is a U-shaped structure or an L-shaped structure, which can prevent the side plate 100 of the battery cell 1000 from moving, improve the stability of the gas discharge of the battery cell 1000, and ensure the exhaust rate.

[0036] According to some embodiments of the present invention, the number of the first plates 10 is two, and the two first plates 10 are respectively connected to two ends of the second plate 20 in the second direction.

[0037] Reference Figure 1 As shown, there are two first plates 10, both of which are located between the housing 300 and the electrode assembly 900, and a first channel section of the exhaust channel extending in the left-right direction is formed between the electrode assembly 900, the housing 300 and the first plate 10. The second plate 20 is located between the cover plate assembly 500 and the electrode assembly 900, and a second channel section of the exhaust channel extending in the up-down direction is formed between the cover plate assembly 500, the housing 300, the second plate 20 and the electrode assembly 900, and at this time, the exhaust channel is a U-shaped structure.

[0038] By providing the side plate 100 of the U-shaped structure, when the battery cell 1000 has thermal runaway, the gas generated in the battery cell 1000 and located on the left side of the electrode assembly 900 and the gas on the upper side of the electrode assembly 900 can flow to the explosion-proof valve position through the first channel section and the second channel section of the exhaust channel located on the upper side of the electrode assembly 900, so that the gas inside the battery cell 1000 quickly converges to the explosion-proof valve and is discharged to the outside of the battery cell 1000 through the explosion-proof valve. The gas generated in the battery cell 1000 and located on the left side of the electrode assembly 900 and the gas on the lower side of the electrode assembly 900 can flow to the explosion-proof valve position through the first channel section and the second channel section of the exhaust channel located on the lower side of the electrode assembly 900, so that the gas inside the battery cell 1000 quickly converges to the explosion-proof valve and is discharged to the outside of the battery cell 1000 through the explosion-proof valve.

[0039] Since the side plate 100 is provided with an exhaust passage located on the side where the explosion-proof valve is located between the shell 300 and the electrode assembly 900, the gas can be further accelerated to converge to the explosion-proof valve, thereby increasing the gas discharge speed.

[0040] The two first plates 10 are respectively connected to the two ends of the second plate 20 in the second direction to form a U-shaped side plate 100, which can make the structure of the side plate 100 more stable and prevent the side plate 100 from moving, thereby improving the gas discharge rate inside the electrode assembly 900.

[0041] According to some embodiments of the present invention, a tab avoidance hole 21 is formed on the second plate 20 and passes through the second plate 20 along the first direction.

[0042] Reference Figure 1 As shown, the tab avoidance hole 21 on the second plate 20 extends in the up-down direction, and the tab of the electrode assembly 900 can pass through the tab avoidance hole 21 from left to right and be electrically connected to the pole. When the cover plate assembly 500 presses the second plate 20, the second plate 20 will move to the left and press the electrode assembly 900. Since the second plate 20 has the tab avoidance hole 21 through which the tab can pass, the second plate 20 can be prevented from crushing the tab.

[0043] According to some embodiments of the present invention, the first plate 10 is connected to the second plate 20 by welding, bonding or clamping.

[0044] The first plate 10 and the second plate 20 are firmly connected by welding, bonding or clamping, which can make the selection of the connection method between the first plate 10 and the second plate 20 more flexible and diverse.

[0045] According to some embodiments of the present invention, the first plate 10 and the second plate 20 are integrally formed.

[0046] The first plate 10 and the second plate 20 are integrally formed, so that the connection between the first plate 10 and the second plate 20 is more firmly established, and the connection between the first plate 10 and the second plate 20 is more beautiful and concise, without any welds or splicing marks, and the connection process between the first plate 10 and the second plate 20 is simple, without the need for subsequent connection operations, thereby simplifying the process flow and improving assembly efficiency.

[0047] According to some embodiments of the present invention, the first plate 10 may include: a first section 11 and a second section 12, the number of the first section 11 and the number of the second section 12 are both multiple, the multiple first sections 11 and the multiple second sections 12 are alternately arranged in the first direction and connected in sequence, wherein in a third direction perpendicular to the first direction and the second direction (for example Figure 1 The width of the first section 11 is greater than the width of the second section 12, and both side edges of the first section 11 in the third direction exceed both side edges of the second section 12 in the third direction.

[0048] Reference Figure 4 As shown, the second section 12 and the first section 11 are alternately distributed along the left-right direction, and the width of the first section 11, for example Figure 4 The distance between the two ends of the first section 11 in the front-to-back direction and the width of the second section 12 are shown, for example Figure 4 As shown, the distance between the two ends of the second section 12 in the front-to-back direction is such that the width of the first section 11 is greater than the width of the second section 12. The first section 11 and the second section 12 located on the first plate 10 form a first plate 10 with a herringbone structure, which can enhance the strength of the first plate 10 and extend the service life of the side plate 100. Since the second sections 12 are spaced apart in the left-right direction of the first plate 10, the width of the second section 12 is smaller than that of the first section 11, and an exhaust passage with a larger width is formed, which is beneficial to improving the exhaust efficiency of the exhaust passage.

[0049] According to some embodiments of the present invention, in the third direction, the width of the electrode assembly 900 is the pole group width, the width of the first section 11 is the first width, and the width of the second section 12 is the second width, wherein the pole group width is at least 1 mm greater than the first width, and the first width and the second width are both greater than or equal to 3 mm.

[0050] Reference Figure 5 and Figure 6As shown, the width of the electrode assembly is greater than the first width, which can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm, the second width can be 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, and the first width can be 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm. By limiting the first width and the second width to be greater than 3mm, the structural strength of the first plate 10 can be ensured, and the width of the electrode assembly 900 is limited to be at least 1mm greater than the first width, so that the cross-sectional size of the exhaust channel meets the requirements for rapid gas discharge in the battery cell 1000, which is conducive to ensuring that the gas can be discharged quickly.

[0051] According to some embodiments of the present invention, in the second direction, the thickness of the first plate 10 is greater than or equal to 0.2 mm.

[0052] The thickness F of the first plate 10 can be 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, or 0.25 mm. By limiting the thickness of the first plate 10 to be greater than or equal to 0.2 mm, it can be ensured that the first plate 10 has sufficient structural strength.

[0053] According to the battery cell 1000 of the embodiment of the second aspect of the utility model, the battery cell 1000 includes: a housing 300, a cover plate, an electrode assembly 900, and a side plate 100 of the battery cell 1000 according to the embodiment of the first aspect of the utility model. The cover plate is provided on one side of the housing 300 in the first direction, and an explosion-proof valve is provided on the cover plate; the electrode assembly 900 is provided in the housing 300; the first plate 10100 is provided between the electrode assembly 900 and the housing 300, and the second plate is located between the electrode assembly 900 and the cover plate.

[0054] According to the battery cell 1000 of the embodiment of the utility model, when the battery cell 1000 has thermal runaway, the gas generated in the battery cell 1000 can flow to the explosion-proof valve position through the first channel section and the second channel section of the exhaust channel, so that the gas inside the battery cell 1000 quickly gathers at the explosion-proof valve and is discharged to the outside of the battery cell 1000 through the explosion-proof valve. At the same time, the side plate 100 is a U-shaped structure or an L-shaped structure, and abuts between the electrode assembly 900 and the housing 300, which can prevent the side plate 100 of the battery cell 1000 from moving, thereby increasing the gas discharge rate inside the battery cell 1000, thereby extending the service life of the battery cell 1000 and improving the quality of the battery cell 1000.

[0055] According to some embodiments of the present invention, the battery cell 1000 may further include: an insulating sheet 400 , which is coated on the outside of the electrode assembly 900 and the side plate 100 , and the side plate 100 is thermally melt-connected to the insulating sheet 400 .

[0056] Reference Figure 1 and Figure 6 As shown, the insulating member is used to insulate and protect the electrode assembly 900. For example, the insulating sheet 400 can be made of polyimide film. The insulating sheet 400 is located on the side of the first plate 10 away from the electrode assembly 900 in the up and down direction. The insulating sheet 400 is hot-melt connected to the side plate 100, which can make the side plate 100 and the insulating sheet 400 firmly connected, and can prevent the side plate 100 from moving and affecting the shape of the exhaust channel, thereby avoiding the effect on the gas discharge in the battery cell 1000.

[0057] Optimally, the first plate 10 has a positioning hole 13 for use in assembly. When assembling the side plate 100, it is necessary to align the positioning hole 13 on the side plate 100 with the positioning hole 13 on the insulating sheet 400, and insert the mounting pin into the positioning hole 13 of the side plate 100 and the positioning hole 13 of the insulating sheet 400. After the installation is completed, the mounting pin needs to be pulled out.

[0058] According to some embodiments of the utility model, one side of the shell 300 is open, and the battery cell 1000 may also include a cover plate assembly 500, which is arranged on the open side of the shell 300, and the cover plate assembly 500 includes a lower insulating member 510, wherein in the first direction, the second plate 20 abuts between the lower insulating member 510 and the electrode assembly 900.

[0059] Reference Figure 1 and Figure 2 As shown, the cover plate assembly 500 is located on the right side of the second plate 20, and the lower insulating member 510 is located on the left side of the cover plate assembly 500. The cover plate assembly 500 moves to the left to press the second plate 20 to prevent the second plate 20 from moving. At the same time, since the side plate 100 is a U-shaped structure, the movement of the two first plates 10 can also be avoided, thereby preventing the side plate 100 from moving and affecting the shape of the exhaust channel, thereby avoiding the effect on gas discharge in the battery cell 1000.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A side plate of a battery cell, the battery cell comprising a shell, an electrode assembly and a cover plate, the cover plate is arranged on one side of the shell, the electrode assembly and the side plate are arranged in the shell, the side plate, the shell, the cover plate and the electrode assembly cooperate to define an exhaust channel, and an explosion-proof valve is arranged on the cover plate. It is characterized in that The side panel comprises: a first plate extending along a first direction; The second plate extends along a second direction, is connected to one end of the first plate in the first direction, and is arranged on a side of the electrode assembly facing the cover plate, and the first direction is perpendicular to the second direction.

2. The side plate of the battery cell according to claim 1, It is characterized in that The number of the first plates is two, and the two first plates are respectively connected to two ends of the second plate in the second direction.

3. The side plate of the battery cell according to claim 2, It is characterized in that The second plate is formed with a tab avoidance hole which passes through the second plate along the first direction.

4. The side plate of the battery cell according to claim 2, It is characterized in that The first plate and the second plate are connected by welding, bonding or clamping; or, the first plate and the second plate are integrally formed.

5. The side plate of the battery cell according to claim 1, It is characterized in that The first plate includes: a first section and a second section, the first section and the second section are both multiple in number, and the multiple first sections and the multiple second sections are alternately arranged in the first direction and connected in sequence, wherein in a third direction perpendicular to the first direction and the second direction, the width of the first section is greater than the width of the second section, and both side edges of the first section in the third direction exceed both side edges of the second section in the third direction.

6. The side plate of the battery cell according to claim 5, It is characterized in that In the third direction, the width of the electrode assembly is the electrode group width, the width of the first section is the first width, and the width of the second section is the second width. The pole group width is at least 1 mm greater than the first width, and the first width and the second width are both greater than or equal to 3 mm.

7. The side plate of the battery cell according to claim 5, It is characterized in that In the second direction, the thickness of the first plate is greater than or equal to 0.2 mm.

8. A battery cell, It is characterized in that include: case; a cover plate, the cover plate being arranged on one side of the housing in the first direction, and the cover plate being provided with an explosion-proof valve; an electrode assembly, wherein the electrode assembly is disposed in the housing; According to the side plate of the battery cell according to any one of claims 1 to 7, the first plate is arranged between the electrode assembly and the shell.

9. The battery cell according to claim 8, It is characterized in that Also includes: An insulating sheet is coated on the outer sides of the electrode assembly and the side plate, and the side plate is thermally melt-connected to the insulating sheet.

10. The battery cell according to claim 8 or 9, It is characterized in that One side of the housing is open, and the battery cell further comprises a cover assembly, which is arranged on the open side of the housing, and the cover assembly comprises a lower insulating member, Wherein, in the first direction, the second plate abuts between the lower insulating member and the electrode assembly.

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