Shell assembly, sensor assembly and battery pack

Abstract

The utility model provides a shell assembly, a sensor assembly and a battery pack. The shell assembly comprises a shell and a crimping part, a containing cavity is formed in the shell, the containing cavity is used for containing a sensor, the shell comprises a first side wall used for abutting against the sensor, a first through hole communicated with the containing cavity is formed in the first side wall, the first through hole is used for corresponding to a monitoring probe of the sensor, and the crimping part is located in the containing cavity. The crimping part is used for abutting against the sensor so that the sensor can abut against the first side wall. According to the application, the sensor is arranged in the shell assembly, the shell assembly can be used for protecting the sensor, and the pressing part is used for abutting against the sensor, so that the abutting tightness between the sensor and the first side wall can be ensured, and the monitoring accuracy of the sensor is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a shell assembly, a sensor assembly and a battery pack. BACKGROUND

[0002] With the large-scale application of power batteries in new energy vehicles, the power batteries have caused temperature rise, smoke, fire and even explosion due to thermal runaway, which not only causes loss to the health and property safety of users, but also greatly damages the public's confidence in new energy vehicles. In order to avoid or reduce the harm of power battery thermal runaway, it is necessary to issue a thermal runaway warning before the thermal runaway occurs. Therefore, in the design and development of a power battery pack, various types of sensors are arranged in the power battery pack to monitor the state of the battery pack in real time.

[0003] The air pressure sensor in the battery pack is used to detect the air pressure in the pressure relief channel of the battery pack box. When the battery cell in the battery pack has thermal runaway, the battery cell releases a large amount of gas into the pressure relief channel. When the air pressure sensor senses the abnormal air pressure in the pressure relief channel, it transmits a signal to the battery management system, thereby realizing the air pressure monitoring and early warning function of the battery cell thermal runaway. However, the abutment tightness between the side of the air pressure sensor with the monitoring probe and the air pressure sensor shell will deteriorate during the long-term use of the battery pack after the air pressure sensor is installed on the box of the battery pack. This results in poor abutment tightness between the air pressure sensor and the battery pack box, thereby reducing the accuracy of air pressure monitoring. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a shell assembly, a sensor assembly and a battery pack, which can improve the problem of reduced sensor monitoring accuracy.

[0005] In a first aspect, embodiments of the present application provide a shell assembly, comprising:

[0006] An outer shell is formed with a receiving cavity for placing a sensor. The outer shell includes a first side wall for abutting the sensor, and the first side wall is provided with a first through hole in communication with the receiving cavity, and the first through hole is used to correspond to a monitoring probe of the sensor.

[0007] A pressure contact member is located in the receiving cavity, and the pressure contact member is used to abut the sensor so that the sensor abuts the first side wall.

[0008] In an embodiment, the outer shell includes a second side wall, the second side wall is arranged opposite to the first side wall, the second side wall is provided with a first mounting groove, and the pressure contact member is located in the first mounting groove.

[0009] In an embodiment, the shell assembly further comprises a first buffer member configured to be arranged between the first sidewall and the sensor; the first buffer member is provided with a second through hole corresponding to the first through hole.

[0010] In an embodiment, the first buffer member comprises a foam double-sided adhesive tape, and the first buffer member is configured to be attached between the first sidewall and the sensor.

[0011] In an embodiment, the first sidewall is provided with a first connecting portion on a side facing the accommodation cavity, and the first connecting portion is configured to be connected with the sensor; the shell assembly further comprises a second buffer member configured to be arranged between the first connecting portion and the sensor.

[0012] In an embodiment, the shell comprises a first shell and a second shell arranged oppositely, and the first shell and the second shell enclose the accommodation cavity, and the first shell comprises the first sidewall.

[0013] The first shell is provided with a first wire harness groove on a side facing the second shell, and the first wire harness groove is in communication with the accommodation cavity, and the first wire harness groove is configured to allow a wire harness of the sensor to pass through; and / or,

[0014] The second shell is provided with a second wire harness groove on a side facing the first shell, and the second wire harness groove is in communication with the accommodation cavity, and the second wire harness groove is configured to allow the wire harness of the sensor to pass through.

[0015] In an embodiment, the first wire harness groove is coated with a sealant; and / or, the second wire harness groove is coated with a sealant.

[0016] In an embodiment, the shell comprises a first shell and a second shell arranged oppositely, and the first shell and the second shell enclose the accommodation cavity, and the first shell comprises the first sidewall; the shell assembly further comprises a seal member;

[0017] The first shell is provided with a second mounting groove on a side facing the second shell, and the seal member is arranged in the second mounting groove; and / or,

[0018] The second shell is provided with a third mounting groove on a side facing the first shell, and the seal member is arranged in the third mounting groove.

[0019] In an embodiment, the first shell is provided with a first connecting hole, and the second shell is provided with a second connecting hole corresponding to the first connecting hole; the shell assembly further comprises a first connecting member configured to pass through the first connecting hole and the second connecting hole and connect the first shell and the second shell.

[0020] The first connecting hole is arranged outside the area surrounded by the second mounting groove; and / or,

[0021] The second connecting hole is arranged outside the area surrounded by the third mounting groove.

[0022] In a second aspect, embodiments of the present application provide a sensor assembly, comprising:

[0023] The housing assembly according to any one of the preceding items; and

[0024] A sensor located in the accommodating cavity of the housing assembly, the sensor abutting against the first side wall of the housing assembly, and a monitoring probe of the sensor being arranged corresponding to the first through hole on the first side wall.

[0025] In a third aspect, embodiments of the present application provide a battery pack, comprising:

[0026] A battery pack housing provided with a third through hole, the third through hole being in communication with a pressure relief channel in the battery pack housing; and

[0027] The sensor assembly described above, the sensor assembly being connected with the battery pack housing, and the first through hole of the housing assembly in the sensor assembly being in communication with the third through hole.

[0028] In an embodiment, the sensor assembly is connected with the battery pack housing by welding.

[0029] The beneficial effects of embodiments of the present application are as follows:

[0030] In embodiments of the present application, the housing assembly comprises an outer shell and a compression fitting, the outer shell is formed with an accommodating cavity for placing a sensor, the outer shell comprises a first side wall for abutting against the sensor, the first side wall is provided with a first through hole in communication with the accommodating cavity, the first through hole is used for corresponding with a monitoring probe of the sensor, and the compression fitting is located in the accommodating cavity and used for abutting against the sensor to make the sensor abut against the first side wall. By arranging the sensor in the housing assembly, the sensor can be protected by the housing assembly, and by abutting the compression fitting against the sensor, the abutment tightness between the sensor and the first side wall can be ensured, thereby ensuring the monitoring accuracy of the sensor. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0032] Figure 1is an exploded structural schematic view of a sensor assembly provided by embodiments of the present application;

[0033] Figure 2 is a perspective structural schematic view of a sensor assembly provided by embodiments of the present application;

[0034] Figure 3 is a cross-sectional structural schematic view of a sensor assembly provided by embodiments of the present application;

[0035] Figure 4 is a structural schematic view of a first housing in a housing assembly provided by embodiments of the present application;

[0036] Figure 5 is a structural schematic view of a second housing in a housing assembly provided by embodiments of the present application;

[0037] Figure 6 is a structural schematic view of a sensor assembly and a battery pack box before assembly provided by embodiments of the present application;

[0038] Figure 7 is a structural schematic view of a sensor assembly and a battery pack box after assembly provided by embodiments of the present application.

[0039] BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 1. A sensor assembly;

[0041] 10. A housing assembly; 11. An outer shell; 111. A receiving cavity; 112. A first housing; 1121. A first sidewall; 1122. A first through hole; 1123. A first connecting portion; 1124. A first wire harness groove; 1125. A second mounting groove; 1126. A first connecting hole; 113. A second housing; 1131. A second sidewall; 1132. A first mounting groove; 1133. A second wire harness groove; 1134. A third mounting groove; 1135. A second connecting hole; 12. A press-fit member; 13. A first buffer member; 131. A second through hole; 14. A second buffer member; 15. A sealing member; 16. A first connecting member; 17. A second connecting member;

[0042] 20. A sensor; 21. A second connecting portion;

[0043] 3. A battery pack box; 31. A third through hole. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0045] First, the present application provides a shell assembly, please refer to Figure 1 and Figure 4 The shell assembly 10 comprises an outer shell 11, and the outer shell 11 is formed with a receiving cavity 111 for placing a sensor 20, that is, the outer shell 11 is used for sealing and protecting the sensor 20, so as to avoid the interference of the external environment on the sensor 20, thereby ensuring the monitoring stability of the sensor 20.

[0046] Among them, the outer shell 11 comprises a first side wall 1121 for abutting with the sensor 20, and the first side wall 1121 is provided with a first through hole 1122 communicating with the receiving cavity 111, and the first through hole 1122 is used for corresponding with the monitoring probe of the sensor 20. That is, the first side wall 1121 is used for connecting with the monitored object, for example, when the shell assembly 10 is used in the battery pack and connected with the battery pack box 3, the sensor 20 can be used for monitoring the air pressure in the battery pack box 3, and the first through hole 1122 is used for communicating with the air pressure environment in the battery pack box 3. By abutting the sensor 20 with the first side wall 1121, the monitoring probe of the sensor 20 can be abutted with the first side wall 1121, so as to accurately monitor the air pressure in the battery pack box 3.

[0047] The shell assembly 10 comprises a press-fit part 12, and the press-fit part 12 is located in the receiving cavity 111, and the press-fit part 12 is used for abutting with the sensor 20, so that the sensor 20 is abutted with the first side wall 1121. That is, the press-fit part 12 can apply pressure to the sensor 20 through the abutment with the sensor 20, so as to ensure the abutment tightness between the sensor 20 and the first side wall 1121, thereby ensuring the monitoring accuracy of the sensor 20.

[0048] The shell assembly 10 in the embodiment of the present application comprises a shell 11 and a press-fit piece 12, the shell 11 is formed with a receiving cavity 111 for placing the sensor 20, the shell 11 comprises a first side wall 1121 for abutting against the sensor 20, the first side wall 1121 is provided with a first through hole 1122 in communication with the receiving cavity 111, the first through hole 1122 is used for corresponding to the monitoring probe of the sensor 20, and the press-fit piece 12 is located in the receiving cavity 111 and used for abutting against the sensor 20 so that the sensor 20 abuts against the first side wall 1121. By arranging the sensor 20 in the shell assembly 10, the sensor 20 can be protected by the shell assembly 10, and by abutting the press-fit piece 12 against the sensor 20, the abutting tightness between the sensor 20 and the first side wall 1121 can be ensured, thereby ensuring the monitoring accuracy of the sensor 20.

[0049] In some embodiments, referring to Figure 1 and Figure 5 , the shell 11 comprises a second side wall 1131 which is oppositely arranged with the first side wall 1121, the second side wall 1131 is provided with a first mounting groove 1132, and the press-fit piece 12 is located in the first mounting groove 1132. By arranging the first mounting groove 1132 on the second side wall 1131 and arranging the press-fit piece 12 in the first mounting groove 1132, the press-fit piece 12 can be limited by the first mounting groove 1132 to ensure the stability of the press-fit piece 12 in the receiving cavity 111, thereby ensuring the abutting stability of the press-fit piece 12 and the sensor 20, and further ensuring the monitoring stability of the sensor 20.

[0050] It should be noted that when the press-fit piece 12 is installed in the first mounting groove 1132, the press-fit piece 12 partially protrudes from the first mounting groove 1132 to ensure that the press-fit piece 12 can effectively abut against the sensor 20.

[0051] In some embodiments, referring to Figure 1 and Figure 3 , the shell assembly 10 further comprises a first buffer 13 which is arranged between the first side wall 1121 and the sensor 20, that is, when the press-fit piece 12 applies pressure to the sensor 20, the first buffer 13 can be compressed to a certain extent to further ensure the abutting tightness between the sensor 20 and the first side wall 1121. At the same time, the arrangement of the first buffer 13 can also alleviate the vibration and impact of the sensor 20 to a certain extent during use to ensure the monitoring stability of the sensor 20.

[0052] The first buffer 13 is provided with a second through hole 131 corresponding to the first through hole 1122 to ensure the communication of the monitoring probe of the sensor 20 and the object to be monitored. Since the first buffer 13 has a certain compressibility, the first buffer 13 is arranged between the sensor 20 and the first side wall 1121, which can also ensure the sealing between the sensor 20 and the first side wall 1121 to avoid the gas in the object to be monitored flowing out through the gap between the sensor 20 and the first side wall 1121, thereby helping to improve the monitoring accuracy of the sensor 20.

[0053] In some examples, the first buffer 13 includes a foam double-sided adhesive tape, and the first buffer 13 is used to be pasted between the first side wall 1121 and the sensor 20. That is, the first buffer 13 not only plays a certain buffering role, but also can bond the sensor 20 to improve the connection stability between the sensor 20 and the first side wall 1121, thereby ensuring the close abutment between the sensor 20 and the first side wall 1121 to improve the monitoring accuracy and stability of the sensor 20.

[0054] In some embodiments, the first side wall 1121 is provided with a first connecting portion 1123 on the side facing the accommodating cavity 111, and the first connecting portion 1123 is used to be connected with the sensor 20. The shell assembly 10 further includes a second buffer 14 arranged between the first connecting portion 1123 and the sensor 20. That is, when the sensor 20 is connected with the first connecting portion 1123, the second buffer 14 can be compressed to a certain extent to tightly connect the sensor 20 and the first connecting portion 1123. At the same time, the arrangement of the second buffer 14 can also alleviate the vibration and impact of the sensor 20 during use to further ensure the monitoring stability of the sensor 20.

[0055] The sensor 20 is provided with a second connecting portion 21, and the second connecting portion 21, the second buffer 14 and the first connecting portion 1123 are provided with through holes. The shell assembly 10 further includes a second connecting member 17, which sequentially passes through the through holes of the second connecting portion 21, the second buffer 14 and the first connecting portion 1123, and connects the second connecting portion 21 and the first connecting portion 1123 to realize the fixed connection of the sensor 20 and the shell assembly 10.

[0056] It should be noted that the second connecting member 17 can be a screw, and the inner walls of the through holes of the first connecting portion 1123 and the second connecting portion 21 are provided with threads correspondingly to facilitate the screwing in and out of the screw, thereby facilitating the installation and disassembly of the sensor 20, so that when the sensor 20 is abnormal, the sensor 20 can be easily repaired and replaced.

[0057] In some embodiments, the housing 11 includes a first housing 112 and a second housing 113 disposed opposite to each other, the first housing 112 and the second housing 113 forming a receiving cavity 111, and the first housing 112 including a first sidewall 1121. That is, the housing 11 is assembled from the first housing 112 and the second housing 113, the sensor 20 is disposed in the first housing 112, and the crimping member 12 is disposed in the first mounting groove 1132 of the second housing 113. The sensor 20 can be sealed and protected by the fastening of the second housing 113 and the first housing 112. By dividing the housing 11 into a first housing 112 and a second housing 113 in this embodiment, the installation of various components inside the housing 11 is facilitated.

[0058] In some examples, please refer to Figure 4 The first housing 112 has a first wiring harness groove 1124 on the side facing the second housing 113. The first wiring harness groove 1124 communicates with the receiving cavity 111 and is used for the wiring harness of the sensor 20 to pass through. That is, when the sensor 20 is placed in the receiving cavity 111 of the housing 11, the wiring harness of the sensor 20 can be led out through the first wiring harness groove 1124. By opening the first wiring harness groove 1124 on the first housing 112, the sealing between the wiring harness of the sensor 20 and the first housing 112 can be ensured, thereby ensuring the sealing between the first housing 112 and the second housing 113. At the same time, the arrangement of the first wiring harness groove 1124 also helps to ensure the orderliness of the wiring harness of the sensor 20, so as to facilitate the connection design between the sensor 20 and external devices.

[0059] The first wire harness groove 1124 is coated with sealant, which is used to fill the gap between the first wire harness groove 1124 and the sensor 20 wire harness, thereby further improving the sealing between the first housing 112 and the sensor 20 wire harness and between the first housing 112 and the second housing 113, and thus ensuring the monitoring stability of the sensor 20.

[0060] In some examples, please refer to Figure 5 The second housing 113 has a second wiring harness groove 1133 on the side facing the first housing 112. The second wiring harness groove 1133 communicates with the receiving cavity 111 and is used for the wiring harness of the sensor 20 to pass through. That is, when the sensor 20 is placed in the receiving cavity 111 of the housing 11, the wiring harness of the sensor 20 can be led out through the second wiring harness groove 1133. By opening the second wiring harness groove 1133 on the second housing 113, the sealing between the wiring harness of the sensor 20 and the second housing 113 can be ensured, thereby ensuring the sealing between the first housing 112 and the second housing 113. At the same time, the setting of the second wiring harness groove 1133 also helps to ensure the orderliness of the wiring harness of the sensor 20, so as to facilitate the connection design of the sensor 20 with external devices.

[0061] The second wire harness groove 1133 is coated with sealant, which is used to fill the gap between the second wire harness groove 1133 and the wire harness of the sensor 20, thereby further improving the sealing between the second shell 113 and the wire harness of the sensor 20 and between the first shell 112 and the second shell 113, and ensuring the monitoring stability of the sensor 20.

[0062] In some examples, the first shell 112 is provided with a first wire harness groove 1124 on the side facing the second shell 113, and the second shell 113 is provided with a second wire harness groove 1133 on the side facing the first shell 112, the second wire harness groove 1133 is correspondingly arranged with the first wire harness groove 1124, and the wire harness of the sensor 20 passes through the first wire harness groove 1124 and the second wire harness groove 1133 at the same time. That is, when the sensor 20 is arranged in the accommodating cavity 111 of the shell 11, the wire harness of the sensor 20 can be led out through the wire harness grooves on the first shell 112 and the second shell 113 at the same time, so as to ensure the sealing between the first shell 112 and the second shell 113 and the orderliness of the wire harness of the sensor 20.

[0063] The first wire harness groove 1124 is coated with sealant, and the second wire harness groove 1133 is also coated with sealant, which is used to fill the gap between the first wire harness groove 1124 and the second wire harness groove 1133 and the wire harness of the sensor 20, thereby further improving the sealing between the first shell 112 and the second shell 113 and the wire harness of the sensor 20 and between the first shell 112 and the second shell 113, and ensuring the monitoring stability of the sensor 20.

[0064] In some embodiments, referring to Figure 4 and Figure 5 , the shell 11 includes a first shell 112 and a second shell 113 arranged oppositely, the first shell 112 and the second shell 113 form an accommodating cavity 111, and the first shell 112 includes a first side wall 1121. That is, the shell 11 is assembled by the first shell 112 and the second shell 113, the sensor 20 is arranged in the first shell 112, the crimping piece 12 is arranged in the first mounting groove 1132 of the second shell 113, and the sealing protection of the sensor 20 can be realized by the buckling of the second shell 113 and the first shell 112.

[0065] The shell assembly 10 further includes a sealing piece 15 arranged between the first shell 112 and the second shell 113 to realize the sealing connection between the first shell 112 and the second shell 113.

[0066] In some examples, referring to Figure 4The side of the first shell 112 facing the second shell 113 is provided with a second mounting groove 1125, and the sealing element 15 is arranged in the second mounting groove 1125. By arranging the sealing element 15 in the second mounting groove 1125, the sealing element 15 can be limited by the second mounting groove 1125, so as to ensure the stability of the sealing element 15 between the first shell 112 and the second shell 113, thereby helping to ensure the sealing stability between the first shell 112 and the second shell 113.

[0067] In some examples, referring to Figure 5 The side of the second shell 113 facing the first shell 112 is provided with a third mounting groove 1134, and the sealing element 15 is arranged in the third mounting groove 1134. By arranging the sealing element 15 in the third mounting groove 1134, the sealing element 15 can be limited by the third mounting groove 1134, so as to ensure the stability of the sealing element 15 between the first shell 112 and the second shell 113, thereby helping to ensure the sealing stability between the first shell 112 and the second shell 113.

[0068] In some examples, the side of the first shell 112 facing the second shell 113 is provided with a second mounting groove 1125, and the side of the second shell 113 facing the first shell 112 is provided with a third mounting groove 1134, and the sealing element 15 is arranged in the second mounting groove 1125 and the third mounting groove 1134 at the same time. By limiting the sealing element 15 by the second mounting groove 1125 and the third mounting groove 1134 at the same time, it is helpful to further improve the installation stability of the sealing element 15, and also helpful to the extrusion deformation of the sealing element 15 between the first shell 112 and the second shell 113, thereby ensuring the sealing stability between the first shell 112 and the second shell 113.

[0069] In some embodiments, referring to Figure 4 and Figure 5 The first shell 112 is provided with a first connecting hole 1126, and the second shell 113 is provided with a second connecting hole 1135 corresponding to the first connecting hole 1126; the shell assembly 10 further comprises a first connecting element 16, which is used to pass through the first connecting hole 1126 and the second connecting hole 1135 and connect the first shell 112 and the second shell 113. That is, the first shell 112 and the second shell 113 are fixedly connected through the first connecting element 16.

[0070] It should be noted that the first connecting element 16 can be a screw, and the inner walls of the first connecting hole 1126 and the second connecting hole 1135 are provided with threads correspondingly, so as to facilitate the screwing in and out of the screw, thereby helping to assemble and disassemble the shell 11, so as to facilitate the maintenance and replacement of the parts in the shell 11.

[0071] In some examples, when the second mounting groove 1125 is arranged on the first shell 112, the first connecting hole 1126 is arranged outside the area surrounded by the second mounting groove 1125, that is, the first connecting hole 1126 is arranged outside the sealing member 15, so as to avoid the arrangement of the first connecting hole 1126 affecting the sealing effect of the sealing member 15, thereby ensuring the sealed connection between the first shell 112 and the second shell 113.

[0072] In some examples, when the third mounting groove 1134 is arranged on the second shell 113, the second connecting hole 1135 is arranged outside the area surrounded by the third mounting groove 1134, that is, the second connecting hole 1135 is arranged outside the sealing member 15, so as to avoid the arrangement of the second connecting hole 1135 affecting the sealing effect of the sealing member 15, thereby ensuring the sealed connection between the first shell 112 and the second shell 113.

[0073] In some examples, when the second mounting groove 1125 is arranged on the first shell 112 and the third mounting groove 1134 is arranged on the second shell 113, the first connecting hole 1126 is arranged outside the area surrounded by the second mounting groove 1125, and the second connecting hole 1135 is arranged outside the area surrounded by the third mounting groove 1134, so as to avoid affecting the sealing effect of the sealing member 15, thereby ensuring the sealed connection between the first shell 112 and the second shell 113.

[0074] Secondly, the embodiment of the present application provides a sensor assembly, which comprises a shell assembly, the specific structure of which is referred to the above-mentioned embodiments. Since the sensor assembly adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0075] Please refer to Figure 2 and Figure 3 , the sensor assembly 1 comprises a shell assembly 10 and a sensor 20, the sensor 20 is located in the accommodating cavity 111 of the shell assembly 10, the sensor 20 abuts against the first side wall 1121 of the shell assembly 10, and the monitoring probe of the sensor 20 is arranged corresponding to the first through hole 1122 on the first side wall 1121. That is, the first side wall 1121 of the shell assembly 10 is used to be connected with the monitored object. For example, when the sensor assembly 1 is used in the battery pack and connected with the battery pack box 3, the sensor 20 can be used to monitor the air pressure in the battery pack box 3, and the first through hole 1122 is used to communicate with the air pressure environment in the battery pack box 3. By abutting the sensor 20 against the first side wall 1121, the monitoring probe of the sensor 20 can abut against the first side wall 1121, so as to accurately monitor the air pressure in the battery pack box 3.

[0076] Finally, the application also provides a battery pack, which comprises the sensor assembly, and the specific structure of the sensor assembly is referred to the above embodiments. Since the battery pack adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0077] Please refer to Figure 6 and Figure 7 , the battery pack comprises a battery pack box 3 and a sensor assembly 1, the battery pack box 3 is provided with a third through hole 31, the third through hole 31 is communicated with the pressure relief channel in the battery pack box 3, the sensor assembly 1 is connected with the battery pack box 3, and the first through hole 1122 of the shell assembly 10 in the sensor assembly 1 is communicated with the third through hole 31. That is, the sensor 20 in the sensor assembly 1 is used for monitoring the air pressure in the pressure relief channel of the battery pack box 3, so as to timely send an alarm signal when the battery cell in the battery pack box 3 appears thermal runaway, so as to reduce the risk of safety accidents such as explosion of the battery pack. By abutting the sensor 20 and the first side wall 1121 of the sensor assembly 1, the monitoring probe of the sensor 20 can be abutted with the first side wall 1121, so as to help improve the accuracy of the sensor 20 monitoring the air pressure in the pressure relief channel of the battery pack box 3, so as to further ensure the safety of the battery pack.

[0078] Among them, the sensor assembly 1 is welded with the battery pack box 3, that is, the shell 11 of the sensor assembly 1 can adopt a metal material, such as an aluminum alloy material, so that the sensor assembly 1 can be directly welded to the battery pack box 3, so as to ensure the connection stability of the sensor assembly 1 and the battery pack box 3, so as to reduce the risk of loosening or falling off of the sensor assembly 1 from the battery pack box 3 during use of the battery pack, and further ensure the monitoring stability of the sensor 20.

[0079] It should be noted that the setting position of the sensor assembly 1 on the battery pack box 3 can be selected and adjusted according to actual design requirements, as long as the monitoring probe of the sensor 20 is communicated with the pressure relief channel in the battery pack box 3 to monitor the air pressure in the pressure relief channel of the battery pack box 3, which is not specially limited here.

[0080] The above has introduced the embodiments of the application in detail, and the specific examples have been applied to the principle and implementation mode of the application in this paper, and the above embodiment is only used to help understand the method and its core idea of the application; at the same time, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the application.

Claims

1. A housing assembly, characterized by, The shell comprises a first side wall for abutting against the sensor, the first side wall is provided with a first through hole in communication with the accommodating cavity, the first through hole is used for corresponding to a monitoring probe of the sensor. The shell comprises a first side wall for abutting against the sensor, the first side wall is provided with a first through hole in communication with the accommodating cavity, the first through hole is used for corresponding to a monitoring probe of the sensor. The shell comprises a second side wall opposite to the first side wall, the second side wall is provided with a first mounting groove, and the pressure contact piece is located in the first mounting groove.

2. The housing assembly of claim 1, wherein, The shell assembly further comprises a first buffer piece for being arranged between the first side wall and the sensor, and the first buffer piece is provided with a second through hole corresponding to the first through hole.

3. The housing assembly of claim 1, wherein, The first buffer piece comprises a foam double-sided adhesive tape, and the first buffer piece is used for being pasted between the first side wall and the sensor.

4. The housing assembly of claim 3, wherein, The first side wall is provided with a first connecting portion protruding from a side facing the accommodating cavity, the first connecting portion is used for being connected with the sensor, and the shell assembly further comprises a second buffer piece for being arranged between the first connecting portion and the sensor.

5. The housing assembly of claim 1, wherein, The shell comprises a first shell and a second shell arranged oppositely, the first shell and the second shell enclose the accommodating cavity, and the first shell comprises the first side wall.

6. The housing assembly of any one of claims 1 to 5, wherein, The first shell is provided with a first wire harness groove facing the second shell, the first wire harness groove is in communication with the accommodating cavity, and the first wire harness groove is used for allowing a wire harness of the sensor to pass through; and / or The second shell is provided with a second wire harness groove facing the first shell, the second wire harness groove is in communication with the accommodating cavity, and the second wire harness groove is used for allowing the wire harness of the sensor to pass through. The first wire harness groove is coated with sealant; and / or the second wire harness groove is coated with sealant.

7. The housing assembly of claim 6, wherein, The shell comprises a first shell and a second shell arranged oppositely, the first shell and the second shell enclose the accommodating cavity, and the first shell comprises the first side wall; the shell assembly further comprises a seal; 8. The housing assembly of any one of claims 1 to 5, wherein, The first shell is provided with a second mounting groove facing the second shell, and the seal is arranged in the second mounting groove; and / or The second shell is provided with a third mounting groove facing the first shell, and the seal is arranged in the third mounting groove. The first shell is provided with a first connecting hole, the second shell is provided with a second connecting hole corresponding to the first connecting hole, the shell assembly further comprises a first connecting piece for penetrating through the first connecting hole and the second connecting hole and connecting the first shell and the second shell; 9. The housing assembly of claim 8, wherein, The first connecting hole is arranged outside an area surrounded by the second mounting groove; and / or The second connecting hole is arranged outside an area surrounded by the third mounting groove. The shell assembly of any one of claims 1 to 9; 10. A sensor assembly characterized by, and ​ ​ A sensor is located in the accommodating cavity of the shell assembly, the sensor is in abutment with the first side wall of the shell assembly, and a monitoring probe of the sensor is correspondingly arranged with the first through hole on the first side wall.

11. A battery pack, characterized by, Comprise: A battery pack box body is provided with a third through hole, and the third through hole is communicated with a pressure relief channel in the battery pack box body; And The sensor assembly of claim 10 is connected with the battery pack box body, and the first through hole of the shell assembly in the sensor assembly is communicated with the third through hole.

12. The battery pack of claim 11, wherein, The sensor assembly is welded with the battery pack box body.

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