Battery box and battery pack

Abstract

The application provides a battery box and a battery pack. The battery box comprises a box assembly, a collection assembly, a sealing ring and a support. The box assembly has a cavity. A shell wall of the box assembly is provided with a through hole in communication with the cavity. The collection assembly comprises a flexible circuit board and a connector. The flexible circuit board is located in the cavity and connected with a busbar. The flexible circuit board comprises a connection area corresponding to the position of the through hole. The connector is arranged on the side of the connection area facing the through hole and is electrically connected with the connection area. The support is arranged on the side of the connection area away from the through hole. The sealing ring is arranged between the connection area and the shell wall of the box and surrounds the periphery of the through hole. The connector is at least partially arranged in the sealing ring and the through hole. The support and the shell wall of the box assembly clamp the sealing ring to form a sealed protection structure. The battery box provided by the application can improve the problem that the through hole for connecting the connector and the joint is arranged on the box of the battery box, thereby affecting the sealing performance of the battery box.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery box and battery pack. Background Technology

[0002] In related technologies, the battery box of a battery pack typically contains battery cells and a data acquisition harness connected to the battery cells. This data acquisition harness is connected to a connector outside the battery box via a connector to facilitate the transmission of the acquired signals.

[0003] Battery boxes typically have through holes in their casing to allow connectors to connect to the fittings. However, the presence of these through holes can affect the sealing performance of the battery box. Utility Model Content

[0004] The embodiments of this application provide a battery box and battery pack, which can improve the technical problem of the battery box having through holes for connectors and joints to connect, thus affecting the sealing performance of the battery box.

[0005] In a first aspect, embodiments of this application provide a battery box, comprising:

[0006] A housing assembly having a cavity, wherein the shell wall of the housing assembly has a through hole communicating with the cavity;

[0007] The acquisition component includes a flexible circuit board and a connector. The flexible circuit board is located in the cavity and connected to the busbar. The flexible circuit board includes a connection area corresponding to the location of the through hole. The connector is located on the side of the connection area facing the through hole and is electrically connected to the connection area.

[0008] A support member is provided on the side of the connection area opposite to the through hole;

[0009] A sealing ring is disposed between the connection area and the shell wall of the housing assembly, and is arranged around the through hole;

[0010] 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 housing assembly clamp the sealing ring to form a sealed protective structure.

[0011] In some embodiments, the support member is plate-shaped, and the plate surface facing the connection area is flat.

[0012] In some embodiments, 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 one by one to position the connection area.

[0013] In some embodiments, the plurality of positioning holes are formed in the periphery of the connection area.

[0014] In some embodiments, the support member has 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 connection structure connected to the box assembly; the connection structure is connected to the support member for fixing 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 connector. The bracket includes a support portion, which is connected to the housing assembly via the at least one connector. The support portion supports the side of the support member away from the connection area.

[0017] In some embodiments, the connecting structure abuts against the side of the support member opposite to the connecting area.

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

[0019] In some embodiments, the support portion has at least one connecting protrusion protruding on one side facing the support member, and the at least one connector passes through the housing assembly and is connected to the at least one connecting protrusion.

[0020] In some embodiments, the connection area has multiple positioning holes, and the number of connection protrusions is multiple. Each of the multiple connection protrusions is embedded with a positioning element, and the multiple positioning elements are inserted into the multiple positioning holes one by one to position the connection area.

[0021] In some embodiments, there are multiple connectors, which pass through the housing assembly and are connected one-to-one with the multiple positioning elements.

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

[0023] In some embodiments, the number of connectors is multiple, and the multiple connectors are arranged circumferentially along the through hole.

[0024] In some embodiments, the sealing ring has a clearance hole corresponding to the position of the connector, and the connector passes through the clearance hole to connect with the support portion.

[0025] In some embodiments, the housing assembly has a boss on one side of its shell facing the cavity, the boss surrounding the through hole, and the sealing ring is clamped between the connection area and the boss.

[0026] In some embodiments, the enclosure assembly includes an enclosure and an enclosure lid, the enclosure and the enclosure lid forming the cavity; the through hole is formed in the enclosure lid or the enclosure.

[0027] In some embodiments, the flexible circuit board includes a wire harness segment connected to the connection area, the wire harness segment having a trace for connection to the busbar, the trace including a conductor segment and a fuse segment connected in series;

[0028] The width of the safety section is smaller than the width of the conductor section.

[0029] Secondly, embodiments of this application provide a battery pack, comprising:

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

[0031] The battery module includes multiple battery cells and a busbar disposed within the cavity of the battery box, the busbar being connected to the multiple battery cells, and the flexible circuit board of the acquisition component of the battery box being connected to the busbar.

[0032] The beneficial effects of the embodiments of this application are as follows:

[0033] The battery box provided in this application embodiment has a through hole in the shell wall of the box assembly that communicates with the cavity, so that the flexible circuit board of the acquisition component located in the cavity of the box assembly is connected to the busbar, and the connection area of ​​the flexible circuit board corresponds to the through hole of the box assembly. The connector is set 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 connector through the through hole of the box assembly, and the flexible circuit board can transmit the acquired information through the connector and the connector.

[0034] Building upon this, by placing the support member on the side of the connection area away from the through hole, and placing the sealing ring between the connection area and the shell wall of the housing assembly, surrounding the through hole, the connector is at least partially located within the sealing ring and the through hole. The support member and the shell wall of the housing assembly clamp the sealing ring to form a sealed protective structure. This seals the gap between the connection area of ​​the flexible circuit board and the shell wall of the housing assembly, preventing liquids and impurities outside the housing assembly from entering the cavity through the through hole, and preventing liquids and gases inside the housing assembly from leaking out through the through hole. Especially when there is coolant immersing the battery cells inside the housing assembly cavity, it effectively prevents coolant leakage through the through hole of the housing assembly. Attached Figure Description

[0035] 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.

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

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

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

[0039] Figure 4 This is a partial structural schematic diagram of the flexible circuit board provided in an embodiment of this 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; Embedded part 122; Positioning part 123; Connecting structure 13; Connector 131; Bracket 132; Support part 1321; Connecting protrusion 1322; Fitting hole 1323; Acquisition component 14; Flexible circuit board 141; Connecting area 1411; Positioning hole 1412; Wire harness segment 1413; Wiring 1414; Wire segment 1415; Fuse segment 1416; Connector 142; Sealing ring 15; Clearance hole 151; Support member 16; Mounting hole 161; Groove 162; Busbar 17; Output terminal 171. Detailed Implementation

[0042] 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.

[0043] This application provides a battery box and a battery pack. These will be described in detail below.

[0044] First, this application provides a battery box.

[0045] Figure 1 This is a partial view of an exploded schematic diagram of one embodiment of the battery box provided in this application. Figure 2 A partial cross-sectional view of one embodiment of the battery box provided in this application. (See attached image.) Figure 1 and Figure 2 As shown, the battery box 1 includes a box assembly 11 and a data acquisition component 14. The box assembly 11 has a cavity 110, and the shell wall of the box assembly 11 has a through hole 1121 communicating with the cavity 110. The data acquisition component 14 is used to connect to the busbar 17 inside the box assembly 11 to acquire the temperature, voltage, current or other information of the busbar 17, and transmit the acquired information.

[0046] The acquisition component 14 may include a flexible circuit board 141 and a connector 142. The flexible circuit board 141 is located inside the cavity 110 of the housing component 11 and is used to connect to the busbar 17. The flexible circuit board 141 is connected to the connector 142, which is used to connect to the connector, so that the flexible circuit board 141 can transmit the acquired information through the connector 142 and the connector.

[0047] In some embodiments, such 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 in the housing assembly 11. The correspondence between the connection area 1411 and the through hole 1121 means that the orthographic projection of the connection area 1411 onto the plane containing the through hole 1121 at least partially overlaps with the through hole 1121. For example, the entire through hole 1121 may fall within the orthographic projection of the connection area 1411 onto the plane containing the through hole 1121, or the entire orthographic projection of the connection area 1411 onto the plane containing the through hole 1121 may fall within the through hole 1121; this is not limited here. A connector 142 is disposed 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. Thus, the connector 142 corresponds to the position of the through hole 1121 in the housing assembly 11, so that the connector 142 can be connected to the connector through the through hole 1121 in the housing assembly 11.

[0048] The battery box 1 also includes a sealing ring 15 and a support member 16. The support member 16 is located on the side of the connection area 1411 of the flexible circuit board 141 facing away from the through hole 1121. The sealing ring 15 is located between the connection area 1411 of the flexible circuit board 141 and the shell wall of the box assembly 11, and the sealing ring 15 surrounds the through hole 1121. The support member 16 and the shell wall of the box assembly 11 clamp the sealing ring 15 to form a sealed protective structure. Thus, the sealing ring 15 can seal the gap between the connection area 1411 and the shell wall of the box assembly 11, preventing liquids, gases, etc. in the cavity 110 of the box 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 the external connector through the through hole 1121, and the sealing ring 15 can protect the connector 142 from the influence of liquids, gases, etc. in the cavity 110 of the housing assembly 11.

[0050] The battery box 1 provided in this application embodiment has a through hole 1121 in the shell wall of the box assembly 11 communicating with the cavity 110, so that the flexible circuit board 141 of the acquisition component 14 located in the cavity 110 of the box assembly 11 is connected to the busbar 17, and the connection area 1411 of the flexible circuit board 141 corresponds to the through hole 1121 of the box assembly 11. The connector 142 is disposed on the side of the connection area 1411 facing the through hole 1121 and is electrically connected to the connection area 1411, so that the connector 142 can be connected to the connector through the through hole 1121 of the box assembly 11, and the flexible circuit board 141 can transmit the acquired information through the connector 142 and the connector.

[0051] Based on this, by placing the support member 16 on the side of the connection area 1411 away from the through hole 1121, and placing the sealing ring 15 between the connection area 1141 and the shell wall of the housing assembly 111, and surrounding the through hole 1121, the connector 142 is at least partially located within the sealing ring 15 and the through hole 1121. The support member 16 and the shell wall of the housing assembly 111 clamp the sealing ring 15 to form a sealed protection structure. This seals the gap between the connection area 1411 of the flexible circuit board 141 and the shell wall of the housing assembly 11 through the sealing ring 15, preventing liquids and impurities outside the housing assembly 11 from entering the cavity 110 through the through hole 1121, and preventing liquids and gases inside the cavity 110 of the housing assembly 11 from leaking out through the through hole 1121. In particular, when the coolant immersing the battery cell is present in the cavity 110 of the housing assembly 11, it can effectively prevent the coolant from leaking out through the through hole 1121 of the housing assembly 11.

[0052] In some embodiments, the support member 16 can be plate-shaped. One side of the support member 16 is fitted against the side of the connection area 1411 opposite to the connector 142. This allows the support member 16 to provide more stable support for the connection area 1411, ensuring a stable fit between the side of the connection area 1411 with the connector 142 and the sealing ring 15, thereby improving the sealing effect of the sealing ring 15 on the connection area 1411 and the shell wall of the housing assembly 11.

[0053] In this design, 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 tightly with the connection area 1411, and the compression 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 housing assembly 11.

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

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

[0056] In some embodiments, such 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 box 1 includes multiple positioning members 12 connected to the support member 16. The multiple positioning members 12 are inserted one-to-one into the multiple positioning holes 1412 to position the connection area 1411. Thus, the support member 16 can position the connection area 1411 of the flexible circuit board 141 through the multiple positioning members 12, so that the shape of the connection area 1411 remains stable. This avoids deformation of the connection area 1411 during the connection process between the connection area 1411 and the connector 142 through welding or other means, which would affect the connection stability between the connection area 1411 and the connector 142.

[0057] Multiple positioning holes 1412 can be formed around the perimeter of the connecting area 1411 to further improve the positioning effect of the multiple positioning elements 12 on the connecting area 1411 and further reduce the deformation of the connecting area 1411. Specifically, the connecting area 1411 of the flexible circuit board 141 is rectangular. There are four positioning holes 1412. The four positioning holes 1412 are set one-to-one with the four corners of the connecting area 1411.

[0058] In some embodiments, mounting holes 161 may be provided on the support member 16 at positions corresponding to the plurality of positioning holes 1412. Positioning members 12 are installed in the corresponding mounting holes 161, thereby connecting the positioning members 12 to the support member 16. It should be noted that there are multiple mounting holes 161, the number of which is equal to the number of positioning holes 1412, and each mounting hole 161 corresponds one-to-one with a positioning hole 1412. Similarly, the number of positioning members 12 is equal to the number of mounting holes 161, and each positioning member 12 is installed in one-to-one within a mounting hole 161.

[0059] In some embodiments, such as Figures 1 to 3As shown, the battery box 1 also includes a connection structure 13 connected to the box assembly 11. This connection 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 away from the connector 142. By connecting the support member 16 and the box assembly 11 through the connection structure 13, the position of the support member 16 relative to the box assembly 11 can be kept stable. This allows the support member 16 to stably apply force to the connection area 1411 of the flexible circuit board 141 away from the connector 142 after supporting the connection area 1411, thereby stabilizing the compression seal ring 15 between the connection area 1411 and the shell wall of the box assembly 11.

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

[0061] The connecting structure 13 can be made to abut against the side of the support member 16 away from the connecting area 1411, so that the support member 16 can stably support the side of the connecting area 1411 away from the connector 142 and apply appropriate pressure to the connecting area 1411.

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

[0063] The connecting 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 housing assembly 11 via at least one connector 131, thereby connecting the connecting structure 13 to the housing assembly 11. The support portion 1321 of the bracket 132 supports the side of the support member 16 opposite to the connecting area 1411.

[0064] It should be noted that the support part 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 support structures can also be provided between the support part 132 and the support member 16, so that the support part 132 supports the support member 16 through the support structure.

[0065] At least a portion of the busbar 17 may be disposed between the bracket 132 and the connection area 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 may be provided on the side of the support portion 1321 facing the support member 16, so that at least one connector 131 can pass through the housing assembly 11 and connect with at least one connecting protrusion 1322, thereby making the connection between the connector 131 and the bracket 132 more convenient, and the connector 131 can stably apply force to at least one connecting protrusion 1322, so that at least one connecting protrusion 1322 stably abuts against the side of the support member 16 away from the connection area 1411.

[0067] In some embodiments, at least one connecting protrusion 1322 may abut against the side of the support member 16 opposite to the connecting region 1411, thereby abutting the support portion 1321 against the side of the support member 16 opposite to the connecting region 1411. Furthermore, the space between the support portion 1321 and the support member 16 may also be used to install the output terminal 171 of the busbar 17 or other structures.

[0068] In some embodiments, the number of connecting protrusions 1322 may be multiple. The multiple connecting protrusions 1322 abut against the side of the support member 16 away from the connecting area 1411, so as to provide more stable support for the support member 16.

[0069] In some embodiments, a positioning member 12 may be embedded within the connecting protrusion 1322, and the connecting member 131 may 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 may 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. This avoids the problem of the connecting member 131 applying excessive force to the connecting protrusion 1322 when the connecting member 131 is directly connected to it, thus preventing damage to the connecting protrusion 1322.

[0071] Specifically, the connecting protrusion 1322 has a fitting hole 1323 at one end facing the connecting area 1411. At least a portion of the positioning member 12 is inserted into the fitting hole 1323, thereby embedding the positioning member 12 into the connecting protrusion 1322. The positioning member 12 includes an insertion portion 122 and a positioning portion 123. The insertion portion 122 is inserted into the fitting hole 1323 of the connecting protrusion 1322, so that the positioning member 12 is embedded in the connecting protrusion 1322. The positioning portion 123 is located on the side of the connecting protrusion 1322 facing the connecting area 1411. A portion of the positioning portion 123 is located within the mounting hole 161 of the support member 16, so that the position of the positioning portion 123 relative to the support member 16 remains stable. The other portion of the positioning member 12 is located within the positioning hole 1412 of the connecting area 1411 to position the connecting area 1411.

[0072] Of course, the connector 131 can also be directly connected to the connecting protrusion 1322. Specifically, the connector 131 can be directly threaded to the connecting protrusion 1322 to simplify the structure of the bracket 132.

[0073] Specifically, the connecting area 1411 has multiple positioning holes 1412, and multiple connecting protrusions 1322. Positioning elements 12 are embedded within each of the multiple connecting protrusions 1322, and these positioning elements 12 are inserted one-to-one into the multiple positioning holes 1412 to better position the connecting area 1411. Additionally, multiple connecting elements 131 pass through the housing assembly 11 and are connected one-to-one with the multiple positioning elements 12 to improve the connection stability between the housing assembly 11 and the multiple connecting protrusions 1322 of the bracket 132. The multiple connecting elements 131 can pass through the shell wall of the housing assembly 11 and be connected one-to-one with the multiple positioning elements 12.

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

[0075] Specifically, there are four connectors 131 and four connecting protrusions 1322. The support member 16 is a rectangular plate. The four connectors 131 and four connecting protrusions 1322 correspond one-to-one with the four corners of the support member 16. The connector 131 can be a screw or other component that can be connected to the housing assembly 11 and the positioning member 12, which is not limited here.

[0076] In some embodiments, the support member 16 and the flexible circuit board 141 can be bonded together to further improve the support and positioning effect of the support member 16 on the flexible circuit board 141. Specifically, double-sided tape or adhesive can be applied to the surface of the support member 16 facing the flexible circuit board 141, and the support member 16 and the flexible circuit board 141 can be bonded together by double-sided tape or adhesive.

[0077] In some embodiments, a clearance hole 151 may be provided at the position of the sealing ring 15 corresponding to the connector 131. The connector 131 passes through the clearance hole 151 and connects to the support portion 1321, thereby making it easier for the connector 131 to connect to the bracket 132. The number of clearance holes 151 is equal to the number of connectors 131, and they correspond one-to-one.

[0078] Specifically, the housing assembly 11 has multiple through holes 1122. These through holes 1122 are arranged circumferentially along the through hole 1121. The number of multiple connectors 131 is equal to the number of through holes 1122. Each connector 131 passes through one of the multiple through holes 1122 and is inserted into the connection hole 121 of the positioning member 12, thereby connecting the connector 131 to the positioning member 12. The number of through holes 1122, positioning holes 1412, and clearance holes 151 are equal and correspond one-to-one. The connectors 131 also pass through the clearance hole 151 of the sealing ring 15 and the positioning hole 1412 of the flexible member.

[0079] In some embodiments, a groove 162 is formed on the side of the support portion 1321 opposite to the connecting region 1411, corresponding to the position of the connecting protrusion 1322. The connecting protrusion 1322 is inserted into the groove 162 and abuts against the bottom surface of the groove 162, so that the position of the connecting protrusion 1322 relative to the support member 16 is more stable. A mounting hole 161 is formed on the bottom surface of the groove 162 and penetrates the support member 16, so that after the positioning member 12 is embedded in the connecting protrusion 1322, it can pass through the mounting hole 161 and be inserted into the positioning hole 1412 of the connecting region 1411.

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

[0081] In some embodiments, such as Figure 2 and Figure 3As shown, a boss 1123 can be provided on the side of the shell wall of the housing 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. Thus, 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 housing assembly 11 includes a housing 111 and a housing cover 112, which together form a cavity 110. In some embodiments, the through hole 1121 of the housing assembly 11 can be formed in the housing cover 112 of the housing assembly 11, in which case the sealing ring 15 seals the gap between the connecting area 1411 and the housing cover 112. Alternatively, the through hole 1121 of the housing assembly 11 can be formed in the housing 111 of the housing assembly 11, in which case the sealing ring 15 seals the gap between the connecting area 1411 and the housing 111.

[0083] like Figure 4 and Figure 5 As shown, the flexible circuit board 141 includes a wire harness segment 1413 connected to the connection area 1411. The wire harness 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] Specifically, the wiring 1414 of the harness segment 1413 may include a series-connected conductor segment 1415 and a fuse segment 1416, with the width of the fuse segment 1416 being smaller than the width of the conductor segment 1415. Therefore, the current-carrying capacity of the fuse segment 1416 is smaller than that of the conductor segment 1415, thus protecting the conductive structure connected to the flexible circuit board 141.

[0085] In some embodiments, the safety segment 1416 can be formed by etching the wire harness segment 1413, making the formation of the safety segment 1416 more convenient.

[0086] Specifically, the wiring harness segment 1413 has multiple cables 1414, each cable 1414 being connected to the busbar 17. Each cable 1414 includes a conductor segment 1415 and a fuse segment 1416.

[0087] In other embodiments, the melting point of the fuse segment 1416 may be lower than that of the conductor segment 1415, or the resistance of the fuse segment 1416 may be greater than that of the conductor segment 1415. This also allows the current-carrying capacity of the fuse segment 1416 to be smaller than that of the conductor segment 1415, thereby protecting the conductive structure connected to the flexible circuit board 141.

[0088] In this embodiment, connector 142 can be a low-voltage connector.

[0089] This application also provides a battery pack, which includes a battery box. The specific structure of the battery box is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

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

[0091] 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. A battery box characterized by, include: A housing assembly having a cavity, wherein the shell wall of the housing assembly has a through hole communicating with the cavity; The acquisition component includes a flexible circuit board and a connector. The flexible circuit board is located in the cavity and connected to the busbar. The flexible circuit board includes a connection area corresponding to the location of the through hole. The connector is located on the side of the connection area facing the through hole and is electrically connected to the connection area. A support member is provided on the side of the connection area opposite to the through hole; A sealing ring is disposed between the connection area and the shell wall of the housing assembly, and is arranged 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 housing assembly clamp the sealing ring to form a sealed protective structure.

2. The battery pack of claim 1, wherein, The support member is plate-shaped, and the side of the support member facing the connection area is flat.

3. The battery box as described in claim 1, characterized in that, The connection area has multiple positioning holes, and the battery box includes multiple positioning members connected to the support member. The multiple positioning members are inserted into the multiple positioning holes one by one to position the connection area.

4. The battery box as described in claim 3, characterized in that, The plurality of positioning holes are formed at the four edges of the connecting area.

5. The battery box as described in claim 3, characterized in that, The support member has mounting holes at the positions corresponding to the plurality of positioning holes, and the positioning member is installed in the corresponding mounting holes.

6. The battery box as described in any one of claims 1 to 5, characterized in that, The battery box also includes a connection structure connected to the box assembly; the connection 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 as described in claim 6, characterized in that, The connection structure includes a bracket and at least one connector. The bracket includes a support portion, which is connected to the housing assembly via the at least one connector. The support portion supports the side of the support member that is away from the connection area.

8. The battery box as described in claim 7, characterized in that, The connecting structure abuts against the side of the support member opposite to the connecting area.

9. The battery box as described in claim 7, characterized in that, The busbar is at least partially located between the bracket and the connection area.

10. The battery box as claimed in claim 7, characterized in that, The support portion has at least one connecting protrusion protruding on the side facing the support member, and the at least one connector passes through the housing assembly and is connected to the at least one connecting protrusion.

11. The battery box as described in claim 10, characterized in that, The connection area has multiple positioning holes, and there are multiple connection protrusions. Each of the multiple connection protrusions has a positioning element embedded in it. The multiple positioning elements are inserted into the multiple positioning holes one by one to position the connection area.

12. The battery box as described in claim 11, characterized in that, The number of connectors is multiple, and the multiple connectors pass through the housing assembly and are connected one-to-one with the multiple positioning members.

13. The battery box as described in claim 12, characterized in that, The connector is threadedly connected to the corresponding positioning element.

14. The battery box as described in claim 7, characterized in that, The number of connectors is multiple, and the multiple connectors are arranged circumferentially along the through hole.

15. The battery box as claimed in claim 7, characterized in that, The sealing ring has a clearance hole corresponding to the position of the connector, and the connector passes through the clearance hole to connect with the support.

16. The battery box as described in any one of claims 1 to 5, characterized in that, The housing assembly has a boss on one side of its shell facing the cavity, the boss surrounds the through hole, and the sealing ring is clamped between the connection area and the boss.

17. The battery box as described in any one of claims 1 to 5, characterized in that, The enclosure assembly includes an enclosure body and an enclosure lid, which together form the cavity; the through hole is formed in the enclosure lid or the enclosure body.

18. The battery box as described in any one of claims 1 to 5, characterized in that, The flexible circuit board includes a wire harness segment connected to the connection area. The wire harness segment is provided with a trace for connecting to the busbar. The trace includes a conductor segment and a fuse segment connected in series. The width of the safety section is smaller than the width of the conductor section.

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 multiple battery cells and a busbar disposed within the cavity of the battery box, the busbar being connected to the multiple battery cells, and the flexible circuit board of the acquisition component of the battery box being connected to the busbar.

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