Insulating board and battery pack

Abstract

The application provides an insulating plate and a battery pack. The battery pack comprises a shell assembly, a battery cell module, an end plate and the insulating plate. The insulating plate comprises a bottom plate and a fixing part. The bottom plate comprises a main body and a bending part integrally arranged at the outer edge of the main body. The bending part and the main body have a predetermined included angle. The fixing part is connected to the main body and the bending part. The fixing part is used for at least fixing the bending part so that the predetermined included angle between the bending part and the main body is maintained. The insulating plate and the battery pack improve the technical problem that the bending part of the insulating plate is prone to rebound.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to insulating boards and battery packs. Background Technology

[0002] A battery pack typically includes cell modules, end plates, and an insulating plate. The insulating plate is positioned between the end plates and the cell modules to prevent electrical conductivity between them. In related technologies, the insulating plate has a bent portion. This bent portion further improves the insulation between the end plates and the cell modules; that is, the bent portion ensures that the cell modules or end plates do not extend beyond the outer edge of the insulating plate, thus preventing contact between the end plates and the cell modules.

[0003] However, in related technologies, the insulating board is usually made of elastic material, and the bent part is obtained by bending the insulating board, which makes the bent part prone to springback. Utility Model Content

[0004] The embodiments of this application provide an insulating board and a battery pack, which can improve the technical problem that the bent part of the insulating board is prone to springback.

[0005] In a first aspect, embodiments of this application provide an insulating board, the insulating board comprising:

[0006] A base plate, the base plate comprising a main body and a bent portion integrally disposed on the outer edge of the main body, the bent portion having a predetermined included angle with the main body;

[0007] A fixing part is provided, which is connected and fixed to the main body and the bent part. The fixing part is used at least to fix the bent part so that the bent part and the main body are maintained at the predetermined angle. This arrangement, by means of the fixing part, maintains the predetermined angle between the main body and the bent part, thereby preventing the bent part from springing back.

[0008] In some embodiments, the bending portion includes a first bending edge and a second bending edge, which are located at two adjacent outer edges of the main body, and the first bending edge intersects with the second bending edge. The fixing portion is connected and fixed to the first bending edge, the second bending edge, and the base plate. This arrangement prevents the first and second bending edges from springing back, and also allows the fixing portion to distribute the force, thereby improving the service life of the fixing portion.

[0009] In some embodiments, the main body includes a rectangular plate, and the first bent edge includes two first bent edges, which are respectively disposed on opposite sides of the rectangular plate. The second bent edge is disposed on the outer edge of the rectangular plate and located between the two first bent edges. The rectangular plate, the second bent edge, and the two first bent edges form an accommodating space. This arrangement improves the insulation capability of the top surface of the battery cell module and the insulation effect of the insulating plate on the ends of the battery cell module. Furthermore, it improves the connection stability between the first and second bent edges.

[0010] In some embodiments, the accommodating space has a clearance notch located on the side of the rectangular plate opposite to the second bent edge; and / or,

[0011] Both the first and second bent edges are perpendicular to the rectangular plate, with the first bent edge perpendicular to the second bent edge. This arrangement facilitates the installation of the battery cell module's end onto the insulating plate; it also prevents interference or poor coverage of the battery cell module by the insulating plate during installation.

[0012] In some embodiments, the first bent edge includes a first segment and a second segment connected to each other. The first segment is connected to the outer edge of the body, and the second segment is connected to the side of the first segment near the second bent edge. The second segment is bent in a direction close to the second bent edge and abuts against the outer surface of the second bent edge.

[0013] The second bent segment has a first side and a second side disposed opposite to each other. The fixing part includes a fixing member, which includes at least a first fixing folded segment. The first fixing folded segment is bonded to the second segment, the first side, and the second side. This arrangement improves the fixing effect between the second segment and the second bent edge, prevents the first and second bent edges from springing back, and also improves the stability of the fixing member, preventing the fixing member from separating from the second segment or the second bent edge.

[0014] In some embodiments, the fastener further includes:

[0015] A second fixed folding segment is connected to the first fixed folding segment, and the second fixed folding segment is adhered to both the side of the first segment opposite to the geometric center of the main body and the side close to the geometric center of the main body; and / or,

[0016] A fixing section is provided, which is connected to the first fixing folding section and is bonded to the side of the main body opposite to the bending portion. This arrangement further improves the stability of the fixing component and prevents it from separating from the base plate due to excessive external force.

[0017] In some embodiments, along the width direction of the body, the width A of the second segment and the width B of the second bent edge satisfy the relationship: 7 ≤ B / A ≤ 9; and / or,

[0018] Along the width direction of the main body, the width C of the first fixed folding section and the width A of the second section satisfy the relationship: 1 < C / A ≤ 2. This arrangement improves the support effect of the second section on the second bend edge, further preventing the second bend edge from springing back. Simultaneously, it increases the adhesive contact area between the fastener and the second section, making the second section less prone to springback.

[0019] In some embodiments, the body has a first surface and a second surface disposed opposite to each other, and the bent portion is bent in a direction away from the second surface;

[0020] The insulating board also includes an adhesive portion, which is provided on both the first and second surfaces. This configuration improves the connection stability between the insulating board and the end plate, as well as the end of the battery cell module.

[0021] In some embodiments, the adhesive portion includes double-sided adhesive or adhesive-backed foam. This configuration can reduce the manufacturing cost of the insulation board to some extent, or improve the impact resistance of the battery pack to some extent.

[0022] In some embodiments, the fastener includes insulating tape; and / or,

[0023] The main body includes at least one of polycarbonate sheet, thermoplastic polyurethane elastic sheet, and thermoplastic polyester elastic sheet. This design can reduce the manufacturing cost of the insulation board to some extent and also give the insulation board a certain degree of elasticity, improving its impact resistance.

[0024] Secondly, embodiments of this application provide a battery pack that includes the aforementioned insulating plate.

[0025] Unlike related technologies, in this application, since the fixing part is connected and fixed to the main body and the bending part, the fixing part can fix the bending part and maintain a predetermined angle between the bending part and the main body. That is, when the fixing part is connected and fixed to the main body and the bending part, the fixing part can apply a force to the bending part, and this force can balance the springback force applied by the main body to the bending part, thereby preventing the bending part from springing back. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a partial exploded view of the battery pack provided in an embodiment of this application (with the housing assembly removed);

[0028] Figure 2 This is a perspective view of the insulating plate provided in an embodiment of this application;

[0029] Figure 3 This is an exploded structural diagram of the insulating plate provided in an embodiment of this application;

[0030] Figure 4 This is a partial structural diagram of the insulating board provided in an embodiment of this application (with the adhesive and fixing parts removed);

[0031] Figure 5 This is a schematic diagram of the fastener provided in an embodiment of this application from a first-view perspective;

[0032] Figure 6 This is a schematic diagram of the fastener provided in an embodiment of this application from a second perspective;

[0033] Figure 7 yes Figure 6 Enlarged schematic diagram of region I in the middle;

[0034] Figure 8 This is a structural schematic diagram of the fastener provided in an embodiment of this application from a third-person perspective;

[0035] Figure 9 yes Figure 8 Enlarged schematic diagram of region II;

[0036] Figure 10 This is a partial exploded structural diagram of the insulating plate provided in the embodiments of this application (with the adhesive part and part of the fixing part removed).

[0037] The above figures include the following reference numerals:

[0038] 1. Battery pack; 2. Insulating board; 3. Cell module; 4. End plate; 20. Base plate; 21. Main body; 22. Bending part; 23. Fixing part; 24. Adhesive part; 210. Rectangular plate; 211. Accommodating space; 221. First bending edge; 222. Second bending edge; 231. Fixing component; 241. Double-sided adhesive; 2101. First surface; 2102. Second surface; 2111. Avoidance notch; 2211. First section; 2212. Second section; 2221. First side; 2222. Second side; 2311. First fixed folding section; 2312. Second fixed folding section; 2313. Fixing section; 23111. First folding edge; 23112. Second folding edge; 23121. Third folding edge; 23122. Fourth folding edge. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0040] In related technologies, a battery pack includes a housing assembly, cell modules, end plates, and an insulating plate. The cell modules are installed inside the housing assembly. Since most end plates are made of conductive materials, an insulating plate is needed between the end plates and cell modules to prevent short circuits caused by direct contact between the end plates and cell modules. In related technologies, the insulating plate is mostly made of elastic material, forming a buffer layer between the cell module and the end plate. This prevents external forces from squeezing the insulating plate and causing excessive stress, which could damage it. In related technologies, the insulating plate has bent edges to cover the side of the cell module near the end plate, preventing contact and improving insulation performance. These bent edges are usually obtained by directly bending the insulating plate. Because the insulating plate is made of elastic material, the bent edges can spring back, reducing its ability to cover the side of the cell module near the end plate.

[0041] See appendix Figures 1 to 3As shown, to address the problems existing in related technologies, this application provides a battery pack 1, which also includes a housing assembly (not shown), a cell module 3, an end plate 4, and an insulating plate 2. The insulating plate 2 includes a base plate 20 and a fixing part 23. The base plate 20 includes a main body 21 and a bent portion 22 integrally disposed on the outer edge of the main body 21, with a predetermined angle between the bent portion 22 and the main body 21. The fixing part 23 is connected and fixed between the main body 21 and the bent portion 22, and the fixing part 23 is at least used to fix the bent portion 22 so that the bent portion 22 and the main body 21 are maintained at the predetermined angle.

[0042] Specifically, after the bending portion 22 is bent, it is necessary to maintain a predetermined angle between the bending portion 22 and the main body 21. This is to prevent the bending portion 22 from springing back, which would reduce the covering ability of the insulating plate 2 on the battery cell module 3. In this embodiment, since the fixing portion 23 is connected and fixed to the main body 21 and the bending portion 22, the fixing portion 23 can fix the bending portion 22 and maintain a predetermined angle between the bending portion 22 and the main body 21. That is, when the fixing portion 23 is connected to the main body 21 and the bending portion 22, the fixing portion 23 can apply a force to the bending portion 22, and this force can balance the springback force applied by the main body 21 to the bending portion 22, thereby preventing the bending portion 22 from springing back. It is worth mentioning that the predetermined angle can be set according to the shape of the battery cell module 3. For example, when the battery cell module 3 is a rectangular column, the predetermined angle can be set to 90°. Therefore, the predetermined angle is not specifically limited in this embodiment.

[0043] In some embodiments, the bending portion 22 includes a first bending edge 221 and a second bending edge 222. The first bending edge 221 and the second bending edge 222 are located at two adjacent outer edges of the main body 21, and the first bending edge 221 intersects with the second bending edge 222. The fixing portion 23 is connected and fixed to the first bending edge 221, the second bending edge 222 and the base plate 20.

[0044] Specifically, since the first bend edge 221 and the second bend edge 222 are located at two adjacent outer edges of the main body 21, the first bend edge 221 and the second bend edge 222 are subjected to different directions of the rebound force applied by the main body 21. When the first bend edge 221 intersects with the second bend edge 222, and the fixing part 23 is connected and fixed to the first bend edge 221 and the second bend edge 222, the fixing part 23 can apply force to the first bend edge 221 and the second bend edge 222 respectively, thereby preventing the first bend edge 221 and the second bend edge 222 from rebounding at the same time. Furthermore, when the fixing part 23 is connected and fixed to the first bending edge 221, the second bending edge 222 and the base plate 20, the fixing part 23 provided on the base plate 20 has a supporting function. That is, the external force applied to the fixing part 23 by the first bending edge 221 and the second bending edge 222 can be transmitted to the fixing part 23 provided on the base plate 20, so as to disperse the external force on the fixing part 23 and prevent the fixing part 23 from being easily damaged under the force of the first bending edge 221 and the second bending edge 222.

[0045] In some embodiments, the main body 21 includes a rectangular plate 210, and two first bending edges 221 are respectively disposed on opposite sides of the rectangular plate 210. A second bending edge 222 is disposed on the outer edge of the rectangular plate 210 and located between the two first bending edges 221. The rectangular plate 210, the second bending edge 222 and the two first bending edges 221 form an accommodating space 211.

[0046] Specifically, the cell module 3 is a rectangular cell module 3, and the accommodating space 211 covers the end of the rectangular cell module 3 to better isolate the cell module 3 from the end plate 4. Furthermore, it is known that the wiring terminals of the cell module 3 are usually located at the top of the cell module 3. When the accommodating space 211 covers the end of the cell module 3, the second bent edge 222 abuts against the top surface of the end of the cell module 3, thereby improving the insulation capability of the top surface of the cell module 3. That is, this arrangement can, to a certain extent, prevent other conductive components or the cell module 3 within the battery pack 1 from moving when the battery pack 1 is subjected to external impact, causing the conductive components within the battery pack 1 to contact the top surface of the end of the cell module 3, resulting in a short circuit in the cell module 3. On the other hand, in this embodiment, fixing parts 23 are provided between the second bent edge 222, the base plate 20, and each of the first bent edges 221, improving the fixing effect of each of the first bent edges 221 and the second bent edge 222. It is worth mentioning that the shape of the main body 21 can be adjusted according to the shape of the battery cell. For example, when the battery cell is a cylindrical battery cell, the insulating plate 2 can be an arc-shaped plate. Any other modifications under the concept of this application are within the protection scope of this application.

[0047] In some embodiments, the accommodating space 211 has a clearance notch 2111, which is located on the side of the rectangular plate 210 away from the second bent edge 222. When assembling the cell module 3 and the rectangular plate 210, the rectangular plate 210 is moved from top to bottom along the height direction of the battery pack 1, so that the end of the cell module 3 enters the accommodating space 211 through the clearance notch 2111. One advantage of this design is that it is easy to assemble, and the insulating plate 2 can be installed on the edge of the cell module 3 without separating the cell module 3 from the housing assembly.

[0048] In some embodiments, the first bend edge 221 and the second bend edge 222 are both perpendicular to the rectangular plate 210, and the first bend edge 221 is perpendicular to the second bend edge 222.

[0049] Specifically, the first bent edge 221 and the second bent edge 222 are perpendicular to the rectangular plate 210 so that after the end of the battery cell module 3 is installed in the accommodating space 211, the first bent edge 221 and the second bent edge 222 can be parallel to the side wall of the rectangular battery cell module 3, avoiding interference between the first bent edge 221 or the second bent edge 222 and the rectangular battery cell module 3, or a large gap between the first bent edge 221 and the second bent edge 222 and the side wall of the rectangular battery cell module 3. That is to say, if the angle between the first bent edge 221 or the second bent edge 222 and the rectangular plate 210 is too small, for example, less than 90°, when the end of the rectangular battery cell module 3 is installed in the accommodating space 211, the side wall of the rectangular battery cell module 3 will interfere with the first bent edge 221 and the second bent edge 222, which may easily lead to damage to the insulating plate 2. If the angle between the first bent edge 221 or the second bent edge 222 and the rectangular plate 210 is too large, for example, greater than 90°, it may result in a large gap between the first bent edge 221 and the second bent edge 222 and the sidewall of the rectangular cell module 3 after the end of the rectangular cell module 3 is installed in the accommodating space 211. That is, the accommodating space 211 has poor coverage of the rectangular cell module 3, which may easily allow other objects to come into contact with the cell module 3 through the gap, affecting the cell module 3. In addition, the second bent edge 222 being perpendicular to the first bent edge 221 means that the second bent edge 222 is perpendicular to both of the oppositely arranged first bent edges 221, so that the shape of the accommodating space 211 can be adapted to the rectangular cell module 3.

[0050] See Figure 4 As shown, the first bent edge 221 includes a first segment 2211 and a second segment 2212 connected to each other. The first segment 2211 is connected to the outer edge of the main body 21, and the second segment 2212 is connected to the side of the first segment 2211 near the second bent edge 222. The second segment 2212 is bent along the direction close to the second bent edge 222 and abuts against the outer surface of the second bent edge 222. Figures 5 to 7As shown, the second bent edge 222 has a first side surface 2221 and a second side surface 2222, and the fixing part 23 includes a fixing member 231. The fixing member 231 includes at least a first fixing folding section 2311, which is bonded to the second section 2212, the first side surface 2221 and the second side surface 2222.

[0051] Specifically, when the first fixed folding segment 2311 is bonded to the second segment 2212 and the first side surface 2221, since the second segment 2212 is against the first side surface 2221 of the second bending edge 222, when the main body 21 applies a rebound force to the second bending edge 222, the second bending edge 222 transmits the external force it receives to the second segment 2212 and the first fixed folding segment 2311. Because the second segment 2212 is connected to the first segment 2211, the first segment 2211 will apply a supporting force to the second segment 2212, thereby reducing the elastic force applied to the second segment 2212 by the second bending edge 222 to a certain extent. At the same time, the first fixed folding segment 2311 will also apply a supporting force to the second segment 2212, ultimately keeping the second segment 2212 and the second bending edge 222 fixed. In addition, the first fixed folding section 2311 is also bonded to the second side surface 2222 of the second bending edge 222. This design can avoid stress concentration on the first fixed folding section 2311 bonded to the second section 2212 and the first side surface 2221, and prevent the first fixed folding section 2311 from separating from the second section 2212 or the second bending edge 222.

[0052] like Figure 8 and Figure 9 As shown, the fastener 231 also includes a second fixed folding section 2312, which is connected to the first fixed folding section 2311. The second fixed folding section 2312 is bonded to the side of the first section 2211 that is away from the geometric center of the main body 21 and the side that is close to the geometric center of the main body 21.

[0053] In this embodiment, the second fixed folding segment 2312 is connected to the first fixed folding segment 2311, enabling the external force on the first fixed folding segment 2311 to be transferred to the second fixed folding segment 2312. Simultaneously, the second fixed folding segment 2312 provides support to the first segment 2211, preventing it from rebounding. Furthermore, the second fixed folding segment 2312 is bonded to both the side of the first segment 2211 away from the geometric center of the main body 21 and the side closer to the geometric center of the main body 21, thereby increasing the strength of the second fixed folding segment 2312, i.e., increasing the contact area between the first segment 2211 and the second fixed folding segment 2312, and dispersing the stress on the second fixed folding segment 2312.

[0054] In one specific embodiment, both the first fixed folding segment 2311 and the second fixed folding segment 2312 are obtained by folding a portion of the fixing member 231. Specifically, the first fixed folding segment 2311 has a first folding edge 23111 and a second folding edge 23112 connected to each other. The first folding edge 23111 is bonded to the outer surface of the second bending edge 222 and the second segment 2212, and the second folding edge 23112 is bonded to the inner surface of the second bending edge 222. The second fixed folding segment 2312 has a third folding edge 23121 and a fourth folding edge 23122 connected to each other. The third folding edge 23121 is bonded to the outer surface of the first segment 2211, and the fourth folding edge 23122 is bonded to the inner surface of the first segment 2211.

[0055] In some embodiments, the fastener 231 further includes a fixing segment 2313, which is connected to the first fixing folding segment 2311 and is bonded to the side of the main body 21 away from the bending portion 22.

[0056] Specifically, the design of the fixing section 2313 can further disperse the stress on the fixing member 231. That is, the external forces applied to the fixing member 231 by the second bending edge 222 and the first bending edge 221 can be transmitted to the main body 21 through the fixing section 2313, thereby preventing the local stress of the fixing member 231 from being too large and causing damage to the fixing member 231.

[0057] like Figure 10 As shown, along the width direction of the main body 21 (e.g.) Figure 10 In the X direction, the width A of the second segment 2212 and the width B of the second bent edge 222 satisfy the relationship: 7 ≤ B / A ≤ 9. Specifically, if the width A of the second segment 2212 is set too small, for example, B / A is greater than 9, this will result in a small bonding area between the second segment 2212 and the first fixed folding segment 2311, and the first fixed folding segment 2311 will have a weaker springback restriction effect on the second segment 2212, which may cause the second segment 2212 to spring back. At the same time, the support effect of the second segment 2212 on the second bent edge 222 will be weak, which may also cause the second bent edge 222 to spring back. On the other hand, if the width of the second segment 2212 is set too large, for example, B / A is less than 7, it will excessively increase the manufacturing cost of the insulating board 2. Therefore, in this embodiment, B / A needs to satisfy the above relationship. Specifically, the value of B / A can be 7, 7.5, 8, 8.5, and 9.

[0058] In some embodiments, along the width direction of the main body 21, the width C of the first fixed folding segment 2311 and the width A of the second segment 2212 satisfy the relationship: 1 < C / A ≤ 2. When C / A satisfies the above relationship, the width of the first fixed folding segment 2311 can completely cover the width of the second segment 2212 and bond with the second bending edge 222, while also preventing the second segment 2212 and the second bending edge 222 from springing back. At the same time, the length of the first fixed folding segment 2311 will not be too long, causing an excessive increase in the manufacturing cost of the insulating board 2. However, if C / A is less than or equal to 1, the width of the first fixed folding segment 2311 is small, and it may not be possible to bond it to the second segment 2212 and the second bending edge 222 simultaneously. If C / A is greater than 2, although the fixing effect of the first fixed folding segment 2311 on the second segment 2212 and the second bending edge 222 is improved, the manufacturing cost of the insulating board 2 is excessively increased. In this application, the value of C / A can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, and 2.0, etc.

[0059] In some embodiments, the main body 21 has a first surface 2101 and a second surface 2102 disposed opposite to each other, and the bending portion 22 is bent in a direction away from the second surface 2102. The insulating plate 2 also includes an adhesive portion 24, which is provided on both the first surface 2101 and the second surface 2102. Specifically, the adhesive portion 24 on the first surface 2101 is used to bond the insulating plate 2 and the battery cell module 3, thereby improving the connection stability between the insulating plate 2 and the battery cell module 3. The adhesive portion 24 on the second surface 2102 is used to bond the insulating plate 2 and the end plate 4, thereby improving the connection stability between the insulating plate 2 and the end plate 4.

[0060] In some embodiments, the adhesive portion 24 includes double-sided adhesive 241 or adhesive-backed foam. Specifically, using double-sided adhesive 241 in the adhesive portion 24 can greatly reduce the manufacturing cost of the insulating plate 2. If adhesive-backed foam is used in the adhesive portion 24, it provides a certain buffering capacity between the cell module 3 and the insulating plate 2, and between the insulating plate 2 and the end plate 4. This can, to a certain extent, prevent the insulating plate 2 from being damaged by excessive external force applied by the end plate 4 or the cell module 3 when the battery pack 1 is subjected to external impact.

[0061] In some embodiments, the fastener 231 includes insulating tape. Specifically, the fastener 231 uses insulating tape, which has the advantages of low cost, reducing the manufacturing cost of the insulating board 2, and high toughness, preventing the fastener 231 from cracking due to excessive external force, thus preventing it from fixing the first bent edge 221 or the second bent edge 222.

[0062] In some embodiments, the main body 21 includes at least one of a polycarbonate sheet, a thermoplastic polyurethane elastic sheet, and a thermoplastic polyester elastic sheet. Specifically, the polycarbonate sheet, thermoplastic polyurethane elastic sheet, and thermoplastic polyester elastic sheet all have good elasticity. The polycarbonate sheet has high strength, low cost, and a certain flame retardant ability, while the thermoplastic polyurethane elastic sheet has the advantages of low temperature resistance and tear resistance, and the thermoplastic polyester elastic sheet has the advantage of corrosion resistance, thus preventing the thermoplastic polyester elastic sheet from being corroded by electrolyte leakage in the battery cell module 3.

[0063] In summary, this application has at least the following beneficial technical effects:

[0064] (1) By providing a fixing part 23 between the main body 21 and the bending part 22, the bending part 22 is fixed and the predetermined angle between the bending part 22 and the main body 21 is maintained, thereby preventing the bending part 22 from springing back and avoiding a decrease in the covering performance of the insulating plate 2 on the battery cell module 3.

[0065] (2) The bending part 22 includes a first bending edge 221 and a second bending edge 222. The fixing part 23 is disposed between the first bending edge 221, the second bending edge 222 and the main body 21. With this arrangement, the first bending edge 221 and the second bending edge 222 can be fixed by a fixing part 23. At the same time, the fixing part 23 can distribute the stress to the main body 21 and improve the service life of the fixing part 23.

[0066] (3) The fixing part 23 includes a first fixing folding section 2311, a second fixing folding section 2312 and a fixing section 2313. The first fixing folding section 2311 is bonded to the outer surface of the second section 2212 and the second bending edge 222 and the inner surface of the second bending edge 222. The second fixing folding section 2312 is bonded to the outer surface and the inner surface of the first section 2211. The fixing section 2313 is bonded to the side of the main body 21 away from the bending part 22. This design can improve the fixing effect of the fixing member 231 on the bending part 22 and can improve the service life of the fixing part 23 to a certain extent.

[0067] (4) In addition, the fastener 231 of this application uses insulating tape, and the adhesive part 24 can use double-sided adhesive 241, thereby reducing the manufacturing cost of the insulating board 2.

[0068] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An insulating board (2), characterized in that, include: The base plate (20) includes a main body (21) and a bent portion (22) integrally disposed on the outer edge of the main body (21), wherein the bent portion (22) and the main body (21) have a predetermined included angle; A fixing part (23) is connected and fixed to the main body (21) and the bending part (22). The fixing part (23) is at least used to fix the bending part (22) so that the bending part (22) and the main body (21) are maintained at the predetermined angle.

2. The insulating board (2) according to claim 1, characterized in that, The bending portion (22) includes a first bending edge (221) and a second bending edge (222). The first bending edge (221) and the second bending edge (222) are located at two adjacent outer edges of the main body (21), and the first bending edge (221) intersects with the second bending edge (222). The fixing portion (23) is connected and fixed to the first bending edge (221), the second bending edge (222) and the base plate (20).

3. The insulating board (2) according to claim 2, characterized in that, The main body (21) includes a rectangular plate (210), and the first bending edge (221) includes two. The two first bending edges (221) are respectively disposed on opposite sides of the rectangular plate (210). The second bending edge (222) is disposed on the outer edge of the rectangular plate (210) and located between the two first bending edges (221). The rectangular plate (210), the second bending edge (222) and the two first bending edges (221) enclose and form an accommodating space (211).

4. The insulating board (2) according to claim 3, characterized in that, The accommodating space (211) has a clearance notch (2111) located on the side of the rectangular plate (210) opposite to the second bent edge (222); and / or, The first bent edge (221) and the second bent edge (222) are both perpendicular to the rectangular plate (210), and the first bent edge (221) is perpendicular to the second bent edge (222).

5. The insulating board (2) according to claim 2, characterized in that, The first bent edge (221) includes a first segment (2211) and a second segment (2212) connected to each other. The first segment (2211) is connected to the outer edge of the main body (21), and the second segment (2212) is connected to the side of the first segment (2211) near the second bent edge (222). The second segment (2212) is bent in the direction close to the second bent edge (222) and abuts against the outer surface of the second bent edge (222). The second bent edge (222) has a first side surface (2221) and a second side surface (2222) opposite to each other. The fixing part (23) includes a fixing member (231), which includes at least a first fixing folding section (2311) that is bonded to the second section (2212), the first side surface (2221) and the second side surface (2222).

6. The insulating board (2) according to claim 5, characterized in that, The fastener (231) also includes: A second fixed folding segment (2312) is connected to the first fixed folding segment (2311). The second fixed folding segment (2312) is adhered to the side of the first segment (2211) opposite to the geometric center of the main body (21) and the side close to the geometric center of the main body (21); and / or, A fixed section (2313) is connected to the first fixed folding section (2311) and is bonded to the side of the main body (21) away from the bending part (22).

7. The insulating board (2) according to claim 5, characterized in that, Along the width direction of the main body (21), the width A of the second segment (2212) and the width B of the second bent edge (222) satisfy the following relationship: 7 ≤ B / A ≤ 9; and / or, Along the width direction of the main body (21), the width C of the first fixed folding segment (2311) and the width A of the second segment (2212) satisfy the following relationship: 1 < C / A ≤ 2.

8. The insulating board (2) according to any one of claims 1 to 7, characterized in that, The main body (21) has a first surface (2101) and a second surface (2102) disposed opposite to each other, and the bent portion (22) is bent in a direction away from the second surface (2102); The insulating board (2) further includes an adhesive portion (24), and the adhesive portion (24) is provided on both the first surface (2101) and the second surface (2102).

9. The insulating board (2) according to claim 8, characterized in that, The adhesive portion (24) includes double-sided adhesive (241) or adhesive-backed foam.

10. The insulating board (2) according to any one of claims 5 to 7, characterized in that, The fastener (231) includes insulating tape; and / or, The main body (21) includes at least one of polycarbonate sheet, thermoplastic polyurethane elastic sheet and thermoplastic polyester elastic sheet.

11. A battery pack (1), characterized in that, Including the insulating plate (2) as described in any one of claims 1 to 10.

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