Side plate of battery monomer and battery monomer with same

Abstract

The utility model provides a side plate of a battery monomer and a battery monomer with the same, the side plate is arranged in a shell of the battery monomer and is positioned between the inner wall of the shell and an electrode assembly, the side plate extends along a first direction, and the length of the side plate is greater than the length of the electrode assembly in the first direction. According to the side plate of the battery monomer, when the electrode assembly is mounted in the shell, the side plate can effectively protect the electrode assembly, so that the battery monomer can be effectively protected, and the service life of the battery monomer is prolonged.

Description

Technical Field

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

[0002] In the existing battery cell solution, when the electrode assembly is installed in the shell, the electrode assembly is prone to collide with the shell, which may cause damage to the electrode assembly and fail to effectively protect the electrode assembly. 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 provides a side plate of a battery cell, which can effectively protect the electrode assembly.

[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 embodiment of the utility model, the side plate is arranged in the shell of the battery cell and is located between the inner wall of the shell and the electrode assembly. The side plate extends along a first direction. In the first direction, the length of the side plate is greater than the length of the electrode assembly.

[0006] According to the side plate of the battery cell of the utility model, when the electrode assembly is installed in the shell, the side plate can effectively protect the electrode assembly, and further can effectively protect the battery cell, thereby increasing the service life of the battery cell.

[0007] According to some embodiments of the present invention, the difference between the length of the side plate and the length of the electrode assembly is greater than or equal to 6 mm and less than or equal to 16 mm; and / or the ratio of the length of the side plate to the length of the electrode assembly is greater than or equal to 1.01 and less than or equal to 1.2.

[0008] According to some embodiments of the present invention, in a second direction perpendicular to the first direction, a ratio of the width of the side plate to the width of the electrode assembly is greater than or equal to 0.85 and less than or equal to 1.3.

[0009] According to some embodiments of the utility model, the cross-section of the side plate perpendicular to the first direction is rectangular; or, the side plate includes a main body and a first flange, the main body extends along the first direction, the first flange is connected to at least one side of the main body in the second direction and extends toward the electrode assembly in a third direction, the first direction, the second direction and the third direction are perpendicular to each other, wherein the end of the first flange connected to the main body is perpendicular to the main body, or, the first flange is connected to the arc of the main body.

[0010] According to some embodiments of the utility model, the surface of the side plate facing the electrode assembly in the first direction is the first surface, and a plurality of ribs are formed on the side plate, the plurality of ribs extend along the first direction and are arranged at intervals in the second direction, and in the first direction, the ribs are formed by a portion of the side plate protruding from the first surface toward a direction away from the electrode assembly.

[0011] The battery cell according to the second embodiment of the present invention comprises: an electrode assembly and side plates of the battery cell according to the first aspect of the present invention, wherein the side plates are arranged on both sides of the electrode assembly in a third direction perpendicular to the first direction.

[0012] According to the battery cell of the utility model, by providing the side plate of the battery cell of the first embodiment, when the electrode assembly is installed in the shell, the side plate can effectively protect the electrode assembly, and further effectively protect the battery cell, thereby increasing the service life of the battery cell.

[0013] According to some optional embodiments of the present invention, the battery cell further includes: an adhesive member, wherein the adhesive member is disposed between the side plate and the electrode assembly, and the side plate and the electrode assembly are fixedly connected via the adhesive member.

[0014] According to some optional embodiments of the present invention, the number of the adhesive is one or more. When there are multiple adhesives, the multiple adhesives are arranged at intervals along the first direction.

[0015] According to some optional embodiments of the present invention, in the first direction, the total length of the one or more adhesives is smaller than the length of the electrode assembly, and the difference between the length of the electrode assembly and the total length of the adhesives is greater than or equal to 4 mm and less than or equal to 20 mm, and / or the ratio of the total length of the adhesives to the length of the electrode assembly is greater than or equal to 0.8 and less than or equal to 0.99.

[0016] According to some embodiments of the utility model, the adhesive is provided with a second flange on at least one side in the second direction, the second flange is bonded to the surface of one side of the electrode assembly in the second direction, and the length of the second flange in the third direction is 5mm-20mm.

[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 a schematic diagram of a battery cell according to an embodiment of the first aspect of the utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of a side plate of a battery cell shown in ;

[0020] Figure 3 yes Figure 2 A schematic diagram of a first embodiment of a side plate of a battery cell shown in ;

[0021] Figure 4 yes Figure 2 A schematic diagram of a second embodiment of a side plate of a battery cell shown in ;

[0022] Figure 5 yes Figure 2 A schematic diagram of a third embodiment of a side plate of a battery cell shown in FIG.

[0023] Figure 6 yes Figure 2 A schematic diagram of a fourth embodiment of a side plate of a battery cell shown in ;

[0024] Figure 7 yes Figure 2 A schematic diagram of a fifth embodiment of a side plate of a battery cell shown in FIG.

[0025] Figure 8 yes Figure 2 A schematic diagram of a sixth embodiment of a side plate of a battery cell shown in FIG.

[0026] Fig. 9 yes Figure 2 A schematic diagram of a seventh embodiment of a side plate of a battery cell is shown in FIG.

[0027] Reference numerals:

[0028] 100. Battery cell;

[0029] 10. side panel; 11. body; 12. first flange; 13. convex rib;

[0030] 20. Electrode assembly;

[0031] 30. Adhesive member; 31. Second flange. DETAILED DESCRIPTION

[0032] 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.

[0033] Please refer to the following Figure 1-Figure 9A side plate 10 of a battery cell according to an embodiment of the present invention is described.

[0034] Reference Figure 1 and Figure 2 According to the side plate 10 of the battery cell of the embodiment of the present utility model, the side plate 10 is arranged in the shell of the battery cell 100 and is located between the inner wall of the shell and the electrode assembly 20. The side plate 10 is arranged in the first direction (such as Figure 1 In the first direction, the length of the side plate 10 is greater than the length of the electrode assembly 20.

[0035] For example, Figure 1 and Figure 2 As shown, the electrode assembly 20 and the side plate 10 are arranged in the shell, the side plate 10 is arranged between the inner wall of the shell and the electrode assembly 20, and the length of the side plate 10 in the front-to-back direction is greater than the length of the electrode assembly 20.

[0036] The side plate 10 of the battery cell of the utility model can provide protection for the electrode assembly 20 when the electrode assembly 20 is installed in the shell. Compared with the solution of the battery cell 100 without the side plate 10, the side plate 10 of the present embodiment can prevent the electrode assembly 20 from colliding with the shell and being damaged, thereby effectively protecting the electrode assembly 20. At the same time, when the battery cell 100 is assembled, it can avoid direct damage to the electrode assembly 20 after deformation of the shell, causing the battery cell 100 to fail to work, thereby effectively protecting the battery cell 100 and increasing the service life of the battery cell 100.

[0037] According to the side plate 10 of the battery cell of the embodiment of the present invention, when the electrode assembly 20 is installed in the housing, the side plate 10 can effectively protect the electrode assembly 20 and further effectively protect the battery cell 100, thereby increasing the service life of the battery cell 100.

[0038] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , the difference between the length of the side plate 10 and the length of the electrode assembly 20 is greater than or equal to 6 mm and less than or equal to 16 mm. Thus, it is possible to prevent the length of the side plate 10 from being too long to occupy the space inside the housing, thereby ensuring the installation space of the electrode assembly 20, and at the same time, it is possible to prevent the length of the side plate 10 from being too short to effectively protect the electrode assembly 20.

[0039] For example, Figure 1 and Figure 2 As shown, the difference between the length of the side plate 10 and the length of the electrode assembly 20 may be: 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm or 16 mm.

[0040] Furthermore, if Figure 1 and Figure 2 As shown, the ratio of the length of the side plate 10 to the length of the electrode assembly 20 is greater than or equal to 1.01 and less than or equal to 1.2. Thus, the side plate 10 can be further prevented from occupying more space inside the housing, and the protective effect of the side plate 10 on the electrode assembly 20 can be further ensured.

[0041] For example, Figure 1 and Figure 2 As shown, the ratio of the length of the side plate 10 to the length of the electrode assembly 20 may be: 1.01, 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09 or 1.2.

[0042] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , perpendicular to the first direction (such as Figure 1 The second direction (such as the front-to-back direction shown) Figure 1 In the vertical direction shown in FIG. 1 , the ratio of the width of the side plate 10 to the width of the electrode assembly 20 is greater than or equal to 0.85 and less than or equal to 1.3. Thus, the width of the side plate 10 can be prevented from being too wide to occupy the space inside the shell, thereby ensuring the installation space of the electrode assembly 20 and facilitating the insulation detection of the electrode assembly 20. At the same time, the width of the side plate 10 can be prevented from being too narrow to effectively protect the electrode assembly 20, thereby ensuring the protective effect of the side plate 10 on the electrode assembly 20.

[0043] For example, Figure 1 and Figure 2 As shown, the ratio of the width of the side plate 10 to the width of the electrode assembly 20 can be: 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15, 1.2, 1.25 or 1.3.

[0044] According to some optional embodiments of the present invention, referring to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the side plate 10 is perpendicular to the first direction (such as Figure 1 The cross section of the side panel 10 in the front-to-back direction is rectangular. Thus, the side panel 10 can be easily installed in the housing.

[0045] Furthermore, if Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the side plate 10 includes a body 11 and a first flange 12. The body 11 is arranged along a first direction (eg Figure 1The first flange 12 is connected to the body 11 in the second direction (as shown in the front and rear direction). Figure 1 In the up and down direction shown in the figure, the first flange 12 extends toward the electrode assembly 20 in the third direction. That is, the first flange 12 can be connected to one side of the body 11 in the second direction, and the first flange 12 can also be connected to both sides of the body 11 in the second direction. Figure 1 The left and right directions shown) are perpendicular to each other.

[0046] In this way, the first flange 12 can increase the contact area between the side plate 10 and the electrode assembly 20, thereby increasing the protection area of ​​the side plate 10, thereby effectively protecting the electrode assembly 20. At the same time, the extension direction of the first flange 12 is perpendicular to the extension direction of the main body 11, thereby reducing the space occupied by the side plate 10 in the second direction, thereby ensuring the installation space of the electrode assembly 20.

[0047] For example, Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the first flange 12 can be connected to the upper side of the body 11 in the up-down direction, the first flange 12 can also be connected to the lower side of the body 11 in the up-down direction, and the first flange 12 can also be connected to the upper and lower sides of the body 11 in the up-down direction.

[0048] Among them, Figure 3 and Figure 6 As shown, the end of the first flange 12 connected to the body 11 is perpendicular to the body 11, or the first flange 12 is connected to the body 11 in an arc. Therefore, for different battery cells 100, the connection form of the first flange 12 and the body 11 can be adjusted, thereby increasing the versatility of the side plate 10.

[0049] According to some embodiments of the present invention, referring to Figure 1 and Fig. 9 , the side plate 10 is in a first direction (such as Figure 1 The surface facing the electrode assembly 20 in the front-to-back direction (as shown in FIG. 1 ) is the first surface, and a plurality of convex ribs 13 are formed on the side plate 10. That is, two, three, or four or more convex ribs 13 may be formed on the side plate 10, and the plurality of convex ribs 13 extend along the first direction and extend in the second direction (as shown in FIG. 1 ). Figure 1In the first direction, the ribs 13 are formed by a portion of the side plate 10 protruding from the first surface toward a direction away from the electrode assembly 20. In this way, the rigidity of the side plate 10 can be increased, the deformation of the side plate 10 can be prevented, and the torsion resistance of the side plate 10 can be improved, thereby increasing the service life of the side plate 10. In addition, an exhaust channel is defined between the protruding portion of the ribs 13 and the electrode assembly 20, so that the gas inside the shell can be easily discharged to the outside of the shell.

[0050] For example, Figure 1 and Fig. 9 As shown, the right side surface of the side panel 10 is the first surface, and a plurality of ribs 13 are formed on the side panel 10. The ribs 13 protrude leftward from the first surface and extend along the front-to-back direction on the side panel 10. The plurality of ribs 13 are arranged at intervals along the up-down direction.

[0051] According to the battery cell 100 of the second embodiment of the utility model, refer to Figure 1 and Figure 2 , comprising: an electrode assembly 20 and a side plate 10 of the battery cell of the first aspect of this embodiment, the side plate 10 is arranged on the electrode assembly 20 in the third direction (such as Figure 1 on both sides (as shown in the left and right directions) Figure 1 The third direction is perpendicular to the first direction (eg, the left and right sides of the electrode assembly 20 shown in FIG. Figure 1 For example, Figure 1 As shown, the side plates 10 are disposed on the left and right sides of the electrode assembly 20 .

[0052] According to the battery cell 100 of the embodiment of the utility model, by setting the side plate 10 of the battery cell of the first embodiment, when the electrode assembly 20 is installed in the shell, the side plate 10 can effectively protect the electrode assembly 20, and then can effectively protect the battery cell 100, thereby increasing the service life of the battery cell 100.

[0053] According to some embodiments of the present invention, referring to Figure 1 The battery cell 100 further includes: an adhesive member 30, which is disposed between the side plate 10 and the electrode assembly 20, and the side plate 10 and the electrode assembly 20 are fixedly connected by the adhesive member 30. Thus, the adhesive member 30 can ensure the connection strength between the side plate 10 and the electrode assembly 20, and can effectively prevent the side plate 10 from being separated from the electrode assembly 20. Preferably, the adhesive member 30 is a tape, which has a simple bonding form and is convenient for fixing the side plate 10 and the electrode assembly 20.

[0054] According to some optional embodiments of the present invention, referring to Figure 1, the number of adhesive members 30 is one or more, that is, the number of adhesive members 30 can be one, two, or three or more. When there are multiple adhesive members 30, the multiple adhesive members 30 are arranged along the first direction (such as Figure 1 Thus, the plurality of adhesive members 30 can increase the bonding area between the side plate 10 and the electrode assembly 20, thereby ensuring the bonding strength between the side plate 10 and the electrode assembly 20 and effectively preventing the side plate 10 and the electrode assembly 20 from separating.

[0055] For example, Figure 1 As shown, when there is one adhesive member 30 , the adhesive member 30 extends along the front-to-back direction; when there are multiple adhesive members 30 , the multiple adhesive members 30 are arranged at intervals in the front-to-back direction.

[0056] According to some optional embodiments of the present invention, referring to Figure 1 , in the first direction (such as Figure 1 In the front-to-back direction shown in FIG. 2 ), the total length of one or more adhesives 30 is less than the length of the electrode assembly 20, and the difference between the length of the electrode assembly 20 and the total length of the adhesives 30 is greater than or equal to 4 mm and less than or equal to 20 mm. In this way, it is possible to prevent the adhesive 30 from being too long to affect the installation of the electrode assembly 20, and at the same time, it is possible to prevent the adhesive 30 from being too short to affect the bonding effect of the adhesive 30. In addition, the total length of the adhesive 30 is less than the length of the electrode assembly 20, so that the adhesive 30 can be distributed in the length direction of the electrode assembly 20, so that the distribution of the adhesive 30 on the electrode assembly 20 is reasonable, and the installation of the electrode assembly 20 is convenient.

[0057] For example, Figure 1 As shown, the difference between the length of the electrode assembly 20 and the total length of the adhesive 30 may be 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm or 20 mm.

[0058] Furthermore, if Figure 1 As shown, the ratio of the total length of the adhesive 30 to the length of the electrode assembly 20 is greater than or equal to 0.8 and less than or equal to 0.99. Thus, it is possible to further prevent the adhesive 30 from being too long to affect the installation of the electrode assembly 20, and at the same time, it is possible to further prevent the adhesive 30 from being too short to affect the bonding effect of the adhesive 30.

[0059] For example, Figure 1 As shown, the ratio of the total length of the adhesive 30 to the length of the electrode assembly 20 may be: 0.8, 0.82, 0.84, 0.86, 0.88, 0.9, 0.92, 0.94, 0.96 or 0.99.

[0060] According to some optional embodiments of the present invention, referring to Figure 1 , the adhesive member 30 is in the second direction (eg Figure 1 In other words, the adhesive member 30 may be provided with a second flange 31 on one side in the second direction, or may be provided with a second flange 31 on both sides of the adhesive member 30 in the second direction. The second flange 31 is bonded to a surface of one side of the electrode assembly 20 in the second direction, and the second flange 31 is provided on the third direction (as shown in FIG. Figure 1 The length in the left and right direction (as shown) is 5mm-20mm.

[0061] In this way, the second flange 31 can increase the bonding area between the adhesive 30 and the electrode assembly 20, thereby increasing the fixing strength between the adhesive 30 and the electrode assembly 20, and further effectively preventing the side plate 10 from being separated from the electrode assembly 20. In addition, limiting the length of the second flange 31 in the third direction can ensure the bonding area between the second flange 31 and the surface of one side of the electrode assembly 20, thereby ensuring the bonding effect, and preventing the second flange 31 from being too long, thereby increasing the manufacturing cost of the battery cell 100.

[0062] For example, Figure 1 As shown, the upper and lower sides of the adhesive 30 are provided with a second flange 31, the upper second flange 31 is bonded to the upper surface of the electrode assembly 20, and the lower second flange 31 is bonded to the upper surface of the electrode assembly 20. The length of the second flange 31 in the third direction can be: 5mm, 7mm, 9mm, 11mm, 13mm, 15mm, 17mm, 19mm or 20mm.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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, characterized in that: The side plate is disposed in the shell of the battery cell and is located between the inner wall of the shell and the electrode assembly. The side plate extends along a first direction. In the first direction, the length of the side plate is greater than the length of the electrode assembly.

2. The side plate of the battery cell according to claim 1, characterized in that: The difference between the length of the side plate and the length of the electrode assembly is greater than or equal to 6 mm and less than or equal to 16 mm; and / or the ratio of the length of the side plate to the length of the electrode assembly is greater than or equal to 1.01 and less than or equal to 1.

2.

3. The side plate of the battery cell according to claim 1, characterized in that: In a second direction perpendicular to the first direction, a ratio of a width of the side plate to a width of the electrode assembly is greater than or equal to 0.85 and less than or equal to 1.

3.

4. The side plate of the battery cell according to claim 1, characterized in that: The cross-section of the side plate perpendicular to the first direction is rectangular; or, the side plate includes a main body and a first flange, the main body extends along the first direction, the first flange is connected to at least one side of the main body in the second direction and extends toward the electrode assembly in the third direction, the first direction, the second direction and the third direction are perpendicular to each other, wherein the end of the first flange connected to the main body is perpendicular to the main body, or the first flange is connected to the arc of the main body.

5. The side plate of the battery cell according to claim 1, characterized in that: The surface of the side plate facing the electrode assembly in the first direction is the first surface, and a plurality of ribs are formed on the side plate. The plurality of ribs extend along the first direction and are arranged at intervals in the second direction. In the first direction, the ribs are formed by a portion of the side plate protruding from the first surface toward a direction away from the electrode assembly.

6. A battery cell, characterized in that: include: An electrode assembly and a side plate of a battery cell according to any one of claims 1 to 5, wherein the side plates are arranged on both sides of the electrode assembly in a third direction, and the third direction is perpendicular to the first direction.

7. The battery cell according to claim 6, characterized in that: Also includes: An adhesive component is provided between the side plate and the electrode assembly, and the side plate and the electrode assembly are fixedly connected via the adhesive component.

8. The battery cell according to claim 7, characterized in that: The number of the adhesive members is one or more. When there are multiple adhesive members, the multiple adhesive members are arranged at intervals along the first direction.

9. The battery cell according to claim 8, characterized in that: In the first direction, the total length of the one or more adhesives is less than the length of the electrode assembly, and the difference between the length of the electrode assembly and the total length of the adhesives is greater than or equal to 4 mm and less than or equal to 20 mm, and / or the ratio of the total length of the adhesives to the length of the electrode assembly is greater than or equal to 0.8 and less than or equal to 0.

99.

10. The battery cell according to claim 7, characterized in that: The adhesive is provided with a second flange on at least one side in the second direction, the second flange is bonded to a surface of one side of the electrode assembly in the second direction, and the length of the second flange in the third direction is 5 mm-20 mm.

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