Battery box and battery pack

Abstract

The invention provides a battery box and a battery pack, the battery box comprises a box body assembly, a collection assembly, a sealing ring and a supporting piece, the box body assembly is provided with a cavity, and a through hole communicated with the cavity is formed in the shell wall of the box body assembly; the collection assembly comprises a flexible circuit board and a connector, the flexible circuit board is located in the cavity and connected with the busbar, the flexible circuit board comprises a connection area corresponding to the position of the through hole, and the connector is arranged on the side, facing the through hole, of the connection area and electrically connected with the connection area; the supporting piece is arranged on the side, away from the through hole, of the connecting area. The sealing ring is arranged between the connecting area and the shell wall of the box body and surrounds the periphery of the through hole; the connector is at least partially arranged in the sealing ring and the through hole, and the supporting piece and the shell wall of the box body assembly clamp the sealing ring to form a sealing protection structure. According to the battery box provided by the embodiment of the invention, the problem that the sealing performance of the battery box is influenced due to the fact that the box body of the battery box is provided with the through hole for connecting the connector and the joint can be solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery box and a battery pack. Background Art

[0002] In the related art, the battery box of the battery pack is usually provided with battery cells and a collection harness connected to the battery cells. The collection harness is connected to a connector outside the battery box through a connector to facilitate the transmission of the collected signal.

[0003] The battery box body is usually provided with a through hole for the connector to connect to the joint through the through hole. However, the provision of the through hole will affect the sealing performance of the battery box. Summary of the Invention

[0004] The embodiments of the present application provide a battery box and a battery pack, which can improve the technical problem that the battery box body has a through hole for connecting a connector and a joint, which affects the sealing performance of the battery box.

[0005] In a first aspect, an embodiment of the present application provides a battery box, comprising:

[0006] The box assembly has a cavity, and a through hole communicating with the cavity is opened on the shell wall of the box assembly;

[0007] The collection component includes a flexible circuit board and a connector. The flexible circuit board is located in the cavity and connected to the bus bar. The flexible circuit board includes a connection area corresponding to the position of the through hole. The connector is provided on a side of the connection area facing the through hole and is electrically connected to the connection area.

[0008] a support member, provided on a side of the connection area away from the through hole;

[0009] A sealing ring is provided between the connection area and the shell wall of the box assembly and is arranged around the four sides of the through hole;

[0010] The connector is at least partially disposed within the sealing ring and the through hole, and the supporting member and the shell wall of the box assembly clamp the sealing ring to form a sealing protection structure.

[0011] In some embodiments, the support member is provided in a plate shape, and the plate surface of the support member facing the connection area is flat.

[0012] In some embodiments, the connection area is provided with a plurality of positioning holes, the battery box includes a plurality of positioning members connected to the support member, and the plurality of positioning members are inserted into the plurality of positioning holes in a one-to-one correspondence to position the connection area.

[0013] In some embodiments, the plurality of positioning holes are opened in peripheral edge areas of the connection area.

[0014] In some embodiments, the support member is provided with mounting holes at positions corresponding to the plurality of positioning holes, and the positioning member is installed in the corresponding mounting holes.

[0015] In some embodiments, the battery box further includes a connecting structure connected to the box body assembly; the connecting structure is connected to the support member and is used to fix the support member so that the support member supports the side of the connection area away from the connector.

[0016] In some embodiments, the connection structure includes a bracket and at least one connecting member, the bracket includes a supporting portion, the supporting portion is connected to the box assembly through the at least one connecting member, and the supporting portion supports a side of the supporting member away from the connection area.

[0017] In some embodiments, the connection structure abuts against a side of the support member facing away from the connection region.

[0018] In some embodiments, the busbar is at least partially disposed between the bracket and the connection area.

[0019] In some embodiments, at least one connecting protrusion is protruded from one side of the support portion facing the supporting member, and the at least one connecting member passes through the box assembly and is connected to the at least one connecting protrusion.

[0020] In some embodiments, the connection area is provided with a plurality of positioning holes, the number of the connection protrusions is multiple, positioning pieces are embedded in the multiple connection protrusions respectively, and the multiple positioning pieces are inserted into the multiple positioning holes one by one to position the connection area.

[0021] In some embodiments, there are multiple connecting members, and the multiple connecting members pass through the box assembly and are connected to the multiple positioning members in a one-to-one correspondence.

[0022] In some embodiments, the connecting member is threadedly connected to the corresponding positioning member.

[0023] In some embodiments, there are multiple connecting members, and the multiple connecting members are arranged along the circumference of the through hole.

[0024] In some embodiments, a relief hole is formed at a position of the sealing ring corresponding to the connecting member, and the connecting member is connected to the supporting portion through the relief hole.

[0025] In some embodiments, a boss is provided on a side of the shell wall of the box assembly facing the cavity, the boss is arranged around the through hole, and the sealing ring is clamped between the connecting area and the boss.

[0026] In some embodiments, the box assembly includes a box body and a box cover, and the box body and the box cover enclose the cavity; the through hole is opened in the box cover or the box body.

[0027] In some embodiments, the flexible printed circuit board includes a wiring harness segment connected to the connection area, the wiring harness segment is provided with a trace for connecting to the bus bar, and the trace includes a wire segment and a fuse segment connected in series;

[0028] The width of the fuse segment is smaller than the width of the wire segment.

[0029] In a second aspect, an embodiment of the present application provides a battery pack, comprising:

[0030] A battery box, wherein the battery box is the battery box described above;

[0031] The battery module includes a plurality of battery cells and a bus bar arranged in the cavity of the battery box, the bus bar is connected to the plurality of battery cells, and the flexible circuit board of the collection component of the battery box is connected to the bus bar.

[0032] Beneficial effects of the embodiments of the present application:

[0033] The battery box provided in the embodiment of the present application has a through hole opened in the shell wall of the box assembly that communicates with the cavity, so that the flexible circuit board of the collection assembly located in the cavity of the box assembly is connected to the bus, and the connection area of the flexible circuit board corresponds to the through hole of the box assembly. The connector is arranged on the side of the connection area facing the through hole and is electrically connected to the connection area, so that the connector can be connected to the joint through the through hole of the box assembly, so that the flexible circuit board can transmit the collected information through the connector and the joint.

[0034] On this basis, the support member is disposed on the side of the connection area facing away from the through hole, and the sealing ring is disposed between the connection area and the shell wall of the box assembly and is disposed around the through hole. The connector is at least partially disposed within the sealing ring and the through hole, and the support member and the shell wall of the box assembly clamp the sealing ring to form a sealed protective structure. The sealing ring seals the gap between the connection area of the flexible circuit board and the shell wall of the box assembly, preventing liquids, impurities, etc. outside the box assembly from entering the cavity through the through hole, and preventing liquids, gases, etc. inside the cavity of the box assembly from leaking out through the through hole. In particular, when there is coolant in the cavity of the box assembly to immerse the battery cells, the coolant can be effectively prevented from leaking out through the through hole of the box assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A partial view of an exploded schematic diagram of an embodiment of a battery box provided in an embodiment of the present application;

[0037] Figure 2 A partial view of a cross-sectional view of an embodiment of a battery box provided in an embodiment of the present application;

[0038] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0039] Figure 4 A schematic diagram of the partial structure of a flexible circuit board provided in an embodiment of the present application;

[0040] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0041] Battery box 1; box assembly 11; cavity 110; box body 111; box cover 112; through hole 1121; through hole 1122; boss 1123; positioning member 12; connecting hole 121; embedding portion 122; positioning portion 123; connecting structure 13; connecting member 131; bracket 132; supporting portion 1321; connecting protrusion 1322; fitting hole 1323; collection component 14; flexible circuit board 141; connecting area 1411; positioning hole 1412; wiring harness segment 1413; routing 1414; wire segment 1415; fuse segment 1416; connector 142; sealing ring 15; avoidance hole 151; support member 16; mounting hole 161; groove 162; bus 17; output pole 171. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0043] The present invention provides a battery box and a battery pack, which are described in detail below.

[0044] First, an embodiment of the present application provides a battery box.

[0045] Figure 1 A partial view of an exploded schematic diagram of an embodiment of a battery box provided in an embodiment of the present application. Figure 2 A partial view of a cross-sectional view of an embodiment of a battery box provided in an embodiment of the present application. Figure 1 and Figure 2 As shown, the battery box 1 includes a box assembly 11 and a collection assembly 14. The box assembly 11 has a cavity 110. The shell wall of the box assembly 11 is provided with a through hole 1121 that communicates with the cavity 110. The collection assembly 14 is used to connect to the bus 17 in the box assembly 11 to collect the temperature, voltage, current, or other information of the bus 17 and transmit the collected information.

[0046] Among them, the collection component 14 can include a flexible circuit board 141 and a connector 142. The flexible circuit board 141 is located in the cavity 110 of the box component 11 and is used to connect to the bus 17. The flexible circuit board 141 is connected to the connector 142, and the connector 142 is used to connect to the connector so that the flexible circuit board 141 transmits the collected information through the connector 142 and the connector.

[0047] In some embodiments, as Figure 1 and Figure 2As shown, the flexible circuit board 141 includes a connection area 1411 corresponding to the position of the through hole 1121 of the box assembly 11. The connection area 1411 corresponds to the position of the through hole 1121, which means that the orthographic projection of the connection area 1411 on the plane where the through hole 1121 is located at least partially overlaps with the through hole 1121. For example, all of the through holes 1121 fall within the orthographic projection of the connection area 1411 on the plane where the through hole 1121 is located, or the orthographic projection of the connection area 1411 on the plane where the through hole 1121 is located falls within the through hole 1121, and the connector 142 is provided on the side of the connection area 1411 facing the through hole 1121, and the connector 142 is electrically connected to the connection area 1411 of the flexible circuit board 141. Therefore, the connector 142 corresponds to the position of the through hole 1121 of the box assembly 11, so that the connector 142 can be connected to the joint through the through hole 1121 of the box assembly 11.

[0048] The battery case 1 further includes a sealing ring 15 and a support member 16. The support member 16 is disposed on the side of the connection region 1411 of the flexible circuit board 141 facing away from the through-hole 1121. The sealing ring 15 is disposed between the connection region 1411 of the flexible circuit board 141 and the shell wall of the case assembly 11, and the sealing ring 15 is disposed around the four sides of the through-hole 1121. The support member 16 and the shell wall of the case assembly 11 clamp the sealing ring 15 to form a sealed protective structure. As a result, the sealing ring 15 can seal the gap between the connection region 1411 and the shell wall of the case assembly 11, preventing liquid, gas, etc. within the cavity 110 of the case assembly 11 from leaking out through the through-hole 1121.

[0049] The connector 142 is at least partially disposed within the sealing ring 15 and the through hole 1121, so that the connector 142 can be connected to an external joint through the through hole 1121, and the sealing ring 15 can protect the connector 142 to prevent the connector 142 from being affected by the liquid, gas, etc. in the cavity 110 of the box assembly 11.

[0050] The battery box 1 provided in the embodiment of the present application is configured to connect the flexible circuit board 141 of the collection component 14 located in the cavity 110 of the box component 11 to the bus 17 by opening a through hole 1121 in the shell wall of the box component 11 that communicates with the cavity 110, and to make the connection area 1411 of the flexible circuit board 141 correspond to the through hole 1121 of the box component 11, and the connector 142 is arranged on the side of the connection area 1411 facing the through hole 1121 and electrically connected to the connection area 1411, so that the connector 142 is connected to the connector through the through hole 1121 of the box component 11, so that the flexible circuit board 141 transmits the collected information through the connector 142 and the connector.

[0051] On this basis, the support member 16 is arranged on the side of the connection area 1411 away from the through hole 1121, and the sealing ring 15 is arranged between the connection area 1141 and the shell wall of the box assembly 111, and is arranged around the through hole 1121, so that the connector 142 is at least partially arranged in the sealing ring 15 and the through hole 1121, and the support member 16 and the shell wall of the box assembly 111 clamp the sealing ring 15 to form a sealing protection structure, so that the gap between the connection area 1411 of the flexible circuit board 141 and the shell wall of the box assembly 11 is sealed by the sealing ring 15, preventing liquid, impurities, etc. outside the box assembly 11 from entering the cavity 110 through the through hole 1121, and preventing liquid, gas, etc. in the cavity 110 of the box assembly 11 from leaking out through the through hole 1121. In particular, when the cooling liquid for immersing the battery cells exists in the cavity 110 of the box assembly 11 , the cooling liquid can be effectively prevented from leaking out through the through hole 1121 of the box assembly 11 .

[0052] In some embodiments, the support member 16 can be configured in a plate-like shape. One side of the support member 16 is in contact with the side of the connection region 1411 facing away from the connector 142. This allows the support member 16 to more stably support the connection region 1411, allowing the side of the connection region 1411 provided with the connector 142 to be in stable contact with the sealing ring 15, thereby improving the sealing effect of the sealing ring 15 between the connection region 1411 and the shell wall of the box assembly 11.

[0053] Among them, the plate surface of the support member 16 facing the connection area 1411 can be made flat, so that the plate surface of the support member 16 facing the connection area 1411 fits more closely with the connection area 1411, and the compression amount of each part of the sealing ring 15 is more uniform, which is conducive to further improving the sealing effect of the sealing ring 15 on the connection area 1411 and the shell wall of the box assembly 11.

[0054] Specifically, one side of the support member 16 can include an overlapping region with the connection region 1411 of the flexible circuit board 141. This overlapping region is located within the side of the support member 16, thereby enabling the support member 16 to more stably support the connection region 1411. The shape of the connection region 1411 of the flexible circuit board 141 can be substantially the same as that of the side of the support member 16, or the side of the support member 16 can be slightly larger than the connection region 1411 of the flexible circuit board 141. The connection region 1411 of the flexible circuit board 141 is rectangular. Correspondingly, the support member 16 is also a similarly shaped rectangular plate, and the area of the side of the support member 16 is slightly larger than the area of the connection region 1411 of the flexible circuit board 141.

[0055] In some embodiments, the material of the support member 16 may include glass fiber cloth and epoxy resin, so that the support member 16 has high strength, thereby stably supporting the connection area 1411 of the flexible circuit board 141.

[0056] In some embodiments, as Figures 1 to 3 As shown, multiple positioning holes 1412 can be formed in the connection area 1411 of the flexible circuit board 141, and the battery case 1 can include multiple positioning members 12 connected to the support member 16. The multiple positioning members 12 are inserted into the multiple positioning holes 1412 in a one-to-one correspondence to position the connection area 1411. In this way, the support member 16 can position the connection area 1411 of the flexible circuit board 141 through the multiple positioning members 12, maintaining the shape of the connection area 1411 stable. This prevents deformation of the connection area 1411 during the connection between the connection area 1411 and the connector 142 by welding or other means, which could affect the stability of the connection between the connection area 1411 and the connector 142.

[0057] Specifically, multiple positioning holes 1412 can be provided around the edges of the connection region 1411 to further enhance the positioning of the multiple positioning members 12 on the connection region 1411 and further reduce deformation of the connection region 1411. Specifically, the connection region 1411 of the flexible circuit board 141 is rectangular. There are four positioning holes 1412, each corresponding to the four corners of the connection region 1411.

[0058] In some embodiments, mounting holes 161 can be respectively provided at positions on the support member 16 corresponding to the plurality of positioning holes 1412, and the positioning member 12 can be installed in the corresponding mounting holes 161, thereby connecting the positioning member 12 to the support member 16. It should be noted that there are a plurality of mounting holes 161, the number of the plurality of mounting holes 161 being equal to the number of the plurality of positioning holes 1412, and the plurality of mounting holes 161 corresponding one-to-one with the plurality of positioning holes 1412. The number of the plurality of positioning members 12 is equal to the number of the plurality of mounting holes 161, and the plurality of positioning members 12 are installed in the plurality of mounting holes 161 in a one-to-one correspondence.

[0059] In some embodiments, as Figures 1 to 3As shown, the battery case 1 further includes a connecting structure 13 connected to the case assembly 11. The connecting structure 13 is connected to the support member 16 and is used to fix the support member 16 so that the support member 16 supports the side of the connection area 1411 facing away from the connector 142. By connecting the support member 16 and the case assembly 11 via the connecting structure 13, the position of the support member 16 relative to the case assembly 11 can be maintained stable. Therefore, after the support member 16 supports the side of the connection area 1411 of the flexible circuit board 141 facing away from the connector 142, it can stably apply a force to the connection area 1411, so that the connection area 1411 and the shell wall of the case assembly 11 can be stably compressed to form the sealing ring 15.

[0060] It should be noted that the connection structure 13 may be directly connected to or in contact with the support member 16 , or the connection structure 13 may be indirectly connected to or in contact with the support member 16 through other structures, as long as the support member 16 can be fixed.

[0061] The connection structure 13 can be brought into contact with the side of the support member 16 facing away from the connection area 1411 , so that the support member 16 can stably support the side of the connection area 1411 facing away from the connector 142 and apply appropriate pressure to the connection area 1411 .

[0062] In some embodiments, as Figures 1 to 3 As shown, the connection structure 13 and the support member 16 can be supported on a side facing away from the connection area 1411 so that the support member 16 can stably compress the sealing ring 15 through the connection area 1411.

[0063] The connection structure 13 may include a bracket 132 and at least one connector 131. The bracket 132 includes a support portion 1321, which is connected to the box assembly 11 via the at least one connector 131, thereby connecting the connection structure 13 to the box assembly 11. The support portion 1321 of the bracket 132 supports the side of the support member 16 facing away from the connection area 1411.

[0064] It should be noted that the support portion 132 can directly abut against the side of the support member 16 away from the connection area 1411 to support the support member 16. Other supporting structures can also be provided between the support portion 132 and the support member 16 so that the support portion 132 supports the support member 16 through the supporting structure.

[0065] At least a portion of the busbar 17 may be disposed between the bracket 132 and the connection region 1411 , thereby connecting the bracket 132 to the busbar 17 and positioning and supporting the busbar 17 .

[0066] Continue to refer to Figures 1 to 3In some embodiments, at least one connecting protrusion 1322 can be protruded from the side of the support portion 1321 facing the support member 16, so that at least one connecting member 131 can pass through the box assembly 11 and be connected to at least one connecting protrusion 1322, thereby making the connection between the connecting member 131 and the bracket 132 more convenient, and the connecting member 131 can stably apply force to the at least one connecting protrusion 1322, so that the at least one connecting protrusion 1322 can stably abut against the side of the support member 16 away from the connection area 1411.

[0067] In some embodiments, at least one connecting protrusion 1322 can be brought into contact with a side of the support member 16 facing away from the connecting region 1411, thereby causing the supporting portion 1321 to abut against a side of the support member 16 facing away from the connecting region 1411. Furthermore, the space between the supporting portion 1321 and the support member 16 can also be used to mount the output pole 171 of the busbar 17 or other structures.

[0068] In some embodiments, there may be a plurality of connecting protrusions 1322. The plurality of connecting protrusions 1322 are respectively in contact with a side of the support member 16 away from the connecting region 1411 to support the support member 16 more stably.

[0069] In some embodiments, a positioning member 12 can be embedded in the connecting protrusion 1322, and the connecting member 131 can be connected to the positioning member 12, thereby connecting the connecting member 131 to the connecting protrusion 1322. Specifically, the positioning member 12 has a connecting hole 121, and the connecting member 131 is inserted into the connecting hole 121, thereby connecting the connecting member 131 to the positioning member 12. The connecting member 131 can be threadedly connected to the corresponding positioning member 12, making the connection between the connecting member 131 and the positioning member 12 more stable and convenient.

[0070] The strength of the positioning member 12 is greater than that of the connecting protrusion 1322. Thus, when the connecting member 131 is directly connected to the connecting protrusion 1322, the connecting member 131 can avoid applying too much force to the connecting protrusion 1322, thereby damaging the connecting protrusion 1322.

[0071] Specifically, a fitting hole 1323 is defined on one end of the connecting protrusion 1322 facing the connecting region 1411. At least a portion of the positioning member 12 is inserted into the fitting hole 1323, thereby fitting the positioning member 12 into the connecting protrusion 1322. The positioning member 12 includes an embedding portion 122 and a positioning portion 123. The embedding portion 122 is inserted into the fitting hole 1323 of the connecting protrusion 1322, thereby fitting the positioning member 12 into the connecting protrusion 1322. The positioning portion 123 is located on the side of the connecting protrusion 1322 facing the connecting region 1411. A portion of the positioning portion 123 is located within the mounting hole 161 of the support member 16, thereby maintaining a stable position of the positioning portion 123 relative to the support member 16. Another portion of the positioning member 12 is located within the positioning hole 1412 of the connecting region 1411 to position the connecting region 1411.

[0072] Of course, the connecting member 131 may also be directly connected to the connecting protrusion 1322. Specifically, the connecting member 131 may be directly threadedly connected to the connecting protrusion 1322 to simplify the structure of the bracket 132.

[0073] Specifically, the connection area 1411 is provided with a plurality of positioning holes 1412, and the number of connecting protrusions 1322 is multiple. Positioning members 12 are respectively embedded in the multiple connecting protrusions 1322. The multiple positioning members 12 are inserted into the multiple positioning holes 1412 in a one-to-one correspondence to better position the connection area 1411. In addition, there are multiple connecting members 131, and the multiple connecting members 131 pass through the housing assembly 11 and connect with the multiple positioning members 12 in a one-to-one correspondence to improve the connection stability between the housing assembly 11 and the multiple connecting protrusions 1322 of the bracket 132. The multiple connecting members 131 can pass through the shell wall of the housing assembly 11 and connect with the multiple positioning members 12 in a one-to-one correspondence.

[0074] In some embodiments, there may be multiple connectors 131. The multiple connectors 131 are arranged along the circumference of the through hole 1121 to further improve the connection stability between the bracket 132 and the box assembly 11, so that the bracket 132 can support the support member 16 more stably.

[0075] Specifically, there are four connecting members 131 and four connecting protrusions 1322. The support member 16 is a rectangular plate. The four connecting members 131 and the four connecting protrusions 1322 correspond to the four corners of the support member 16. The connecting members 131 can be screws or other components capable of connecting to the box assembly 11 and the positioning member 12, and are not limited here.

[0076] In some embodiments, the support member 16 and the flexible circuit board 141 may be bonded to further enhance the support and positioning effect of the support member 16 on the flexible circuit board 141. Specifically, double-sided tape or glue may be applied to the surface of the support member 16 facing the flexible circuit board 141, and the double-sided tape or glue may be applied to the flexible circuit board 141 to bond the support member 16 to the flexible circuit board 141.

[0077] In some embodiments, a clearance hole 151 can be opened at the position of the sealing ring 15 corresponding to the connecting member 131. The connecting member 131 passes through the clearance hole 151 and is connected to the support portion 1321, thereby making it more convenient for the connecting member 131 to be connected to the bracket 132. The number of the clearance holes 151 is equal to the number of the connecting members 131, and they correspond one to one.

[0078] Specifically, the box assembly 11 is provided with a plurality of through holes 1122. The plurality of through holes 1122 are arranged along the circumference of the through hole 1121. The number of the plurality of connectors 131 is equal to the number of the plurality of through holes 1122. The plurality of connectors 131 pass through the plurality of through holes 1122 in a one-to-one correspondence and are inserted into the connection holes 121 of the positioning member 12 so that the connectors 131 are connected to the positioning member 12. Among them, the number of the plurality of through holes 1122, the plurality of positioning holes 1412 and the plurality of avoidance holes 151 are equal and correspond one to one. The connector 131 also passes through the avoidance hole 151 of the sealing ring 15 and the positioning hole 1412 of the flexible member.

[0079] In some embodiments, a groove 162 is defined on the side of the support portion 1321 facing away from the connection region 1411, corresponding to the position of the connection protrusion 1322. The connection protrusion 1322 is inserted into the groove 162 and abuts against the bottom surface of the groove 162, thereby further stabilizing the position of the connection protrusion 1322 relative to the support member 16. Furthermore, a mounting hole 161 is defined in the bottom surface of the groove 162 and extends through the support member 16, so that the positioning member 12 can be inserted into the mounting hole 161 and into the positioning hole 1412 of the connection region 1411 after being inserted into the connection protrusion 1322.

[0080] In some embodiments, as Figures 1 to 3 As shown, the battery box 1 may further include a busbar 17, the output pole 171 of which is located between the support member 16 and the support portion 1321. The connecting protrusion 1322 passes through the output pole 171 of the busbar 17 and abuts against the support member 16.

[0081] In some embodiments, as Figure 2 and Figure 3As shown, a boss 1123 can be provided on the side of the housing wall of the box assembly 11 facing the cavity 110. The boss 1123 is arranged around the through hole 1121, and the sealing ring 15 is clamped between the connection area 1411 and the boss 1123. As a result, the boss 1123 can increase the compression of the sealing ring 15, thereby further improving the sealing effect of the sealing ring 15.

[0082] like Figure 1 As shown, the box assembly 11 includes a box body 111 and a box cover 112, which together form a cavity 110. In some embodiments, the through hole 1121 of the box assembly 11 can be provided in the box cover 112 of the box assembly 11, and the sealing ring 15 seals the gap between the connection area 1411 and the box cover 112. Of course, the through hole 1121 of the box assembly 11 can also be provided in the box body 111 of the box assembly 11, and the sealing ring 15 seals the gap between the connection area 1411 and the box body 111.

[0083] like Figure 4 and Figure 5 As shown, the flexible circuit board 141 includes a wiring segment 1413 connected to the connection area 1411 . The wiring segment 1413 is provided with a trace 1414 for connecting to the bus 17 to collect information such as temperature, current, and voltage of the bus 17 .

[0084] The wiring 1414 of the wiring harness segment 1413 can include a wire segment 1415 and a fuse segment 1416 connected in series, with the width of the fuse segment 1416 being smaller than that of the wire segment 1415. Thus, the current carrying capacity of the fuse segment 1416 is smaller than that of the wire segment 1415, thereby protecting the conductive structure connected to the flexible printed circuit board 141.

[0085] In some embodiments, the safety segment 1416 may be formed by etching the wire harness segment 1413 , so that the formation of the safety segment 1416 is more convenient.

[0086] Specifically, the wiring harness section 1413 is provided with a plurality of traces 1414 , each trace 1414 being respectively connected to the bus bar 17 . Each trace 1414 includes a conductor segment 1415 and a fuse segment 1416 .

[0087] In other embodiments, the melting point of the fuse segment 1416 can be made lower than the melting point of the wire segment 1415, or the resistance of the fuse segment 1416 can be made higher than the resistance of the wire segment 1415. Similarly, the overcurrent capacity of the fuse segment 1416 can be made lower than the overcurrent capacity of the wire segment 1415, thereby protecting the conductive structure connected to the flexible circuit board 141.

[0088] In the embodiment of the present application, the connector 142 may be a low-voltage connector.

[0089] An embodiment of the present application also provides a battery pack, which includes a battery box. The specific structure of the battery box refers to the above embodiment. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0090] The battery pack may include a battery box 1 and a battery module (not shown). The battery module includes multiple battery cells and a busbar 17 disposed within a cavity 110 of the battery box 1. The busbar 17 is connected to the multiple battery cells. The flexible circuit board 141 of the collection assembly 14 of the battery box 1 is connected to the busbar 17. The structure of the battery box 1 can be referred to in the above embodiments and will not be repeated here.

[0091] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery box, characterized in that: include: The box assembly has a cavity, and a through hole communicating with the cavity is opened on the shell wall of the box assembly; The collection component includes a flexible circuit board and a connector. The flexible circuit board is located in the cavity and connected to the bus bar. The flexible circuit board includes a connection area corresponding to the position of the through hole. The connector is provided on a side of the connection area facing the through hole and is electrically connected to the connection area. a support member, provided on a side of the connection area away from the through hole; A sealing ring is provided between the connection area and the shell wall of the box assembly and is arranged around the four sides of the through hole; The connector is at least partially disposed within the sealing ring and the through hole, and the supporting member and the shell wall of the box assembly clamp the sealing ring to form a sealing protection structure.

2. The battery box according to claim 1, wherein: The support member is arranged in a plate shape, and the plate surface of the support member facing the connection area is a plane.

3. The battery box according to claim 1, wherein: The connection area is provided with a plurality of positioning holes, and the battery box includes a plurality of positioning members connected to the support member. The plurality of positioning members are inserted into the plurality of positioning holes in a one-to-one correspondence to position the connection area.

4. The battery box according to claim 3, wherein: The plurality of positioning holes are opened in the peripheral edge areas of the connection area.

5. The battery box according to claim 3, wherein: The support member is provided with mounting holes at positions corresponding to the plurality of positioning holes, and the positioning member is installed in the corresponding mounting holes.

6. The battery box according to any one of claims 1 to 5, characterized in that: The battery box also includes a connecting structure connected to the box body assembly; the connecting structure is connected to the support member and is used to fix the support member so that the support member supports the side of the connection area away from the connector.

7. The battery box according to claim 6, characterized in that: The connection structure includes a bracket and at least one connecting member. The bracket includes a supporting portion. The supporting portion is connected to the box assembly through the at least one connecting member. The supporting portion supports a side of the supporting member away from the connection area.

8. The battery box according to claim 7, wherein: The connecting structure abuts against a side of the support member facing away from the connecting area.

9. The battery box according to claim 7, wherein: The busbar is at least partially disposed between the bracket and the connection area.

10. The battery box according to claim 7, wherein: At least one connecting protrusion is protruded from one side of the supporting portion facing the supporting member, and the at least one connecting member passes through the box assembly and is connected to the at least one connecting protrusion.

11. The battery box according to claim 10, wherein: The connection area is provided with a plurality of positioning holes, and the number of the connection protrusions is multiple. Positioning pieces are respectively embedded in the multiple connection protrusions, and the multiple positioning pieces are inserted into the multiple positioning holes in a one-to-one correspondence to position the connection area.

12. The battery box according to claim 11, wherein: There are multiple connecting members, and the multiple connecting members pass through the box assembly and are connected to the multiple positioning members in a one-to-one correspondence.

13. The battery box according to claim 12, wherein: The connecting piece is threadedly connected to the corresponding positioning piece.

14. The battery box according to claim 7, wherein: There are multiple connecting members, and the multiple connecting members are arranged along the circumference of the through hole.

15. The battery box according to claim 7, wherein: The sealing ring is provided with an avoidance hole at a position corresponding to the connecting member, and the connecting member passes through the avoidance hole and is connected to the supporting portion.

16. The battery box according to any one of claims 1 to 5, characterized in that: A boss is provided on one side of the shell wall of the box assembly facing the cavity. The boss is arranged around the through hole, and the sealing ring is clamped between the connecting area and the boss.

17. The battery box according to any one of claims 1 to 5, characterized in that: The box assembly includes a box body and a box cover, and the box body and the box cover enclose the cavity; the through hole is opened in the box cover or the box body.

18. The battery box according to any one of claims 1 to 5, characterized in that: The flexible printed circuit board includes a wiring harness segment connected to the connection area, the wiring harness segment is provided with a trace for connecting to the bus bar, and the trace includes a wire segment and a fuse segment connected in series; The width of the fuse segment is smaller than the width of the wire segment.

19. A battery pack, characterized in that: include: A battery box, wherein the battery box is the battery box according to any one of claims 1 to 18; The battery module includes a plurality of battery cells and a bus bar arranged in the cavity of the battery box, the bus bar is connected to the plurality of battery cells, and the flexible circuit board of the collection component of the battery box is connected to the bus bar.

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