Circuit board assembly, battery pack, and energy storage system

Abstract

A circuit board assembly, a battery pack, and an energy storage system, relating to the technical field of energy storage. The circuit board assembly is disposed in the battery pack. The circuit board assembly comprises a mounting box, a circuit board body, a wiring harness, and a wiring harness sealing cover. The mounting box is provided with an accommodating cavity and a wire arrangement hole in communication with the accommodating cavity; the circuit board body is disposed in the accommodating cavity; the wiring harness is connected to the circuit board body, and passes through the wire arrangement hole; the wiring harness sealing cover comprises a first body and a sealing portion, the first body being hermetically connected to the mounting box and covering the wiring arrangement hole, the first body being provided with a first sealing recess, and the first sealing recess being in communication with the wire arrangement hole; the first body is further provided with a wiring harness hole that connects the first sealing recess with the wire arrangement hole, the wiring harness passes through the wire arrangement hole, the wiring harness hole and the first sealing recess, and the sealing portion is provided in the first sealing recess and covers the wiring harness hole. The present application, by means of the wiring harness sealing cover sealing the wiring harness hole, and the sealing portion sealing the wiring harness hole, ensures the airtightness of the operating environment of the circuit board.

Description

Circuit board assembly, battery pack and energy storage system

[0001] The present application claims priority to the Chinese patent application No. 2024221740310, filed on September 4, 2024, and entitled "Circuit board assembly, battery pack and energy storage system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of energy storage, and specifically relates to a circuit board assembly, a battery pack and an energy storage system. BACKGROUND

[0003] At present, the sealing of the circuit board in the battery pack cannot effectively protect the circuit board, and ensure that the circuit board always has good working performance. For example, when the single battery in the battery pack is in thermal runaway, high temperature may be caused, which increases the risk of burning the elements, lines and solder joints on the circuit board. SUMMARY

[0004] Therefore, the present application develops a circuit board assembly, a battery pack and an energy storage system for a power consumption device. The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] Embodiments of the present application provide a circuit board assembly for being arranged in a battery pack, the circuit board assembly comprising:

[0006] a mounting box having a receiving cavity and a wire outlet hole communicating with the receiving cavity;

[0007] a circuit board body arranged in the receiving cavity;

[0008] a wire harness connected with the circuit board body and penetrating through the wire outlet hole;

[0009] a wire harness sealing cover comprising a first body and a sealing part, the first body being sealingly connected with the mounting box and covering the wire outlet hole, the first body being provided with a first sealing groove, the first sealing groove communicating with the wire outlet hole, the first body further being provided with a wire harness hole communicating the first sealing groove and the wire outlet hole, the wire harness penetrating through the wire outlet hole, the wire harness hole and the first sealing groove, and the sealing part being arranged in the first sealing groove and covering the wire harness hole.

[0010] In some embodiments, a first sealing ring is included, the first sealing ring being arranged around the wire outlet hole, and the wire harness sealing cover being sealingly connected with the mounting box through the first sealing ring.

[0011] In some embodiments, the wire harness sealing cover has a second sealing groove, the second sealing groove being arranged on a side of the wire harness sealing cover facing the mounting box, and the first sealing ring being embedded in the second sealing groove.

[0012] In some embodiments, the first connecting part is arranged around the assembly opening and is connected with the mounting box, and the mounting box is sealingly connected with the cover through the first connecting part.

[0013] In some embodiments, the first connecting part comprises:

[0014] a second body arranged around the assembly opening and connected with the mounting box;

[0015] a second sealing ring arranged around the assembly opening, and the second body is sealingly connected with the mounting box through the second sealing ring.

[0016] In some embodiments, the first connecting part has a third sealing groove, and the second sealing ring is embedded in the third sealing groove.

[0017] In some embodiments, the first connecting part further comprises at least one rib connected with the second body, and the rib is arranged in the third sealing groove.

[0018] In some embodiments, the gap between the wire harness hole and the wire harness is 0.1-1mm.

[0019] Correspondingly, the battery pack provided in the embodiments of the present application comprises the circuit board assembly.

[0020] Correspondingly, the energy storage system provided in the embodiments of the present application comprises the circuit board assembly or the battery pack.

[0021] The present application provides a circuit board assembly arranged in a battery pack, which comprises a mounting box, a circuit board body, a wire harness, and a wire harness sealing cover. The mounting box has a receiving cavity and a wire arranging hole communicating with the receiving cavity. The circuit board body is arranged in the receiving cavity. The wire harness is connected with the circuit board body and passes through the wire arranging hole. The wire harness sealing cover comprises a first body and a sealing part. The first body is sealingly connected with the mounting box and covers the wire arranging hole. The first body is provided with a first sealing groove communicating with the wire arranging hole. The first body is further provided with a wire harness hole communicating with the first sealing groove and the wire arranging hole. The wire harness passes through the wire arranging hole, the wire harness hole, and the first sealing groove. The sealing part is arranged in the first sealing groove and covers the wire harness hole. The circuit board in the battery pack is individually sealed, so as to ensure the sealing of the circuit board operating environment.

[0022] Other aspects can become apparent after reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description only are some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0024] Fig. 1 is an overall structure explosion diagram of the circuit board assembly provided by the embodiments of the present application;

[0025] Fig. 2 is a schematic diagram of the relationship between the wire harness sealing cover and the wire harness provided by the embodiments of the present application;

[0026] Fig. 3 is a sectional structure diagram of the wire harness sealing cover and the wire harness provided by the embodiments of the present application;

[0027] Fig. 4 is an overall structure diagram of the wire harness sealing cover provided by the embodiments of the present application;

[0028] Fig. 5 is a schematic diagram of the position of the wire harness hole provided by the embodiments of the present application;

[0029] Fig. 6 is a schematic diagram of the position of the rib provided by the embodiments of the present application;

[0030] Fig. 7 is an overall structure schematic diagram of the mounting box provided by the embodiments of the present application;

[0031] Fig. 8 is a sectional structure of the overall structure of the circuit board assembly provided by the embodiments of the present application;

[0032] Fig. 9 is a schematic diagram of the position of the circuit board assembly in the battery pack provided by the embodiments of the present application.

[0033] Reference signs: 100 - mounting box; 110 - containing cavity; 120 - wire arranging hole; 130 - assembling opening; 200 - circuit board body; 300 - wire harness; 400 - wire harness sealing cover; 410 - first body; 411 - first sealing groove; 412 - wire harness hole; 420 - sealing part; 430 - second sealing groove; 500 - first sealing ring; 600 - cover body; 700 - first connecting part; 710 - second body; 720 - second sealing ring; 730 - third sealing groove; 740 - rib; 800 - battery pack. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only are some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort, belong to the scope of protection of the present application.

[0035] It should be understood that, although the terms first, second, etc. can be used herein to describe various components, these components should not be limited by these terms. These terms are used only to distinguish one component from another. Thus, a first component discussed below could be termed a second component without departing from the teachings of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] Those skilled in the art can understand that the drawings are only schematic views of the example embodiments, and can not be drawn in scale. The modules or flows in the drawings are not necessarily essential for implementing the present application, and therefore cannot be used to limit the protection scope of the present application.

[0037] The energy storage products on the market generally adopt the method of sealing the circuit board together with the battery as a whole. However, this method of overall sealing has some problems, one of which is that it cannot effectively protect the circuit board. When the battery has thermal runaway, it can cause high temperature, which will increase the risk of burning the components, lines and solder joints on the circuit board, which poses a threat to the reliability and safety of the energy storage product. In addition, the circuit board is a vulnerable component in the energy storage product and needs to be maintained or replaced. However, the overall sealing scheme has poor maintenance convenience, and the entire energy storage product needs to be disassembled to maintain the circuit board. This not only increases the complexity of maintenance, but also can cause damage or loss of other components.

[0038] Therefore, the embodiments of the present application provide a circuit board assembly, which seals the circuit board in the battery pack 800 separately to at least partially solve the above technical problems.

[0039] Referring to FIG. 1, FIG. 5 and FIG. 7, FIG. 1 is an overall structure explosion diagram of a circuit board assembly provided by the embodiment of the application, FIG. 5 is a schematic diagram of the position of a wire harness hole provided by the embodiment of the application, and FIG. 7 is a schematic diagram of the overall structure of a mounting box provided by the embodiment of the application. The circuit board assembly is used to be arranged in a battery pack 800, and the circuit board assembly comprises a mounting box 100, a circuit board body 200, a wire harness 300 and a wire harness sealing cover 400. The mounting box 100 has a containing cavity 110 and a wire discharging hole 120 in communication with the containing cavity 110. The circuit board body 200 is arranged in the containing cavity 110. The wire harness 300 is connected with the circuit board body 200 and is arranged in the wire discharging hole 120. The wire harness sealing cover 400 comprises a first body 410 and a sealing part 420. The first body 410 is sealingly connected with the mounting box 100 and covers the wire discharging hole 120. The first body 410 is provided with a first sealing groove 411 in communication with the wire discharging hole 120. The first body 410 is further provided with a wire harness hole 412 in communication with the first sealing groove 411 and the wire discharging hole 120. The wire harness 300 is arranged in the wire discharging hole 120, the wire harness hole 412 and the first sealing groove 411. The sealing part 420 is arranged in the first sealing groove 411 and covers the wire harness hole 412. In the embodiment, the circuit board body 200 is sealed by the mounting box 100. The wire discharging hole 120 for the wire harness 300 is covered by the wire harness sealing cover 400. The first sealing groove 411 for the wire harness 300 is sealed by the sealing part 420. Thus, the overall single sealing of the circuit board body 200 is realized. The separate sealing of the circuit board is used to solve the problem of poor protection performance of the circuit board caused by overall sealing. That is to say, the separate sealing of the circuit board body 200 is realized by the cooperation of the mounting box 100 and the wire harness sealing cover 400. The circuit board body 200 can be isolated from the battery cell. Thus, even if the battery cell is in thermal runaway and causes high temperature, the circuit board body 200 is not easily damaged. Thus, the circuit board body 200 can be effectively protected. The first sealing groove 411 is sealed by the wire harness sealing cover 400. The wire harness 300 can be disassembled after being installed. The wire harness 300 can be disassembled by removing the sealing connection between the wire harness sealing cover 400 and the mounting box 100. The design scheme of the circuit board assembly of the embodiment ensures the effective protection of the circuit board body 200 and improves the maintenance convenience of the wire harness 300. Thus, the reliability and safety of the energy storage product are better guaranteed.

[0040] Specifically, the number of wire harnesses 300 is determined by the installation requirements required by the circuit board body 200. Assuming that the number of wire arrangement holes 120 is m, and the number of wire harnesses 300 is n. The relationship between the number of wire arrangement holes 120 and the number of wire harnesses 300 is: the number of wire arrangement holes 120 is consistent with the number of wire harnesses 300, that is, m = n, or the number of wire arrangement holes 120 is greater than 1 and less than the number of wire harnesses 300, that is, 1 < m < n, or the number of wire arrangement holes 120 is 1, that is, m = 1, and n is not limited. When m = n, it means that each wire arrangement hole 120 corresponds to one wire harness 300. When 1 < m < n, it means that all wire harnesses 300 are divided into m groups of wire harnesses, and the number of wire harnesses 300 in each group of wire harnesses can be the same or different. Each wire arrangement hole 120 is used to pass through the wire harness 300 in the corresponding wire harness group. When m = 1 and n is not limited, one wire arrangement hole 120 is used to pass through all wire harnesses 300.

[0041] Specifically, assuming that the number of first sealing grooves 411 is i, the number of first sealing grooves 411 can be set as follows:

[0042] One first sealing groove 411 can be set, that is, i = 1, and the first sealing groove 411 surrounds all wire harnesses 300. When the number of wire harnesses 300 is n = 4, the four wire harnesses 300 are respectively referred to as a first wire harness, a second wire harness, a third wire harness, and a fourth wire harness, and the number of first sealing grooves 411 is i = 1, the first sealing groove 411 surrounds the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness.

[0043] Alternatively, one first sealing groove 411 can be set around each wire harness 300, that is, the number of first sealing grooves 411 is consistent with the number of wire harnesses 300, that is, i = n. When the number of wire harnesses 300 is n = 4, the four wire harnesses 300 are respectively referred to as a first wire harness, a second wire harness, a third wire harness, and a fourth wire harness, and the number of first sealing grooves 411 is i = n, one first sealing groove 411 is set around the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness.

[0044] Alternatively, all wire harnesses 300 can be divided into c groups of wire harnesses, c satisfying 1 < c < i, the number of wire harnesses 300 in each group of wire harnesses can be the same or different. When the number of wire harnesses 300 is n = 4, the four wire harnesses 300 are respectively referred to as a first wire harness, a second wire harness, a third wire harness, and a fourth wire harness, and the number of first sealing grooves 411 is i = 3, one first sealing groove 411 simultaneously surrounds the first wire harness and the second wire harness, and the other wire harnesses 300 are individually surrounded by one first sealing groove 411; alternatively, one first sealing groove 411 simultaneously surrounds the first wire harness and the third wire harness, and the other wire harnesses 300 are individually surrounded by one first sealing groove 411; alternatively, one first sealing groove 411 simultaneously surrounds the first wire harness and the fourth wire harness, and the other wire harnesses 300 are individually surrounded by one first sealing groove 411; alternatively, one first sealing groove 411 simultaneously surrounds the second wire harness and the third wire harness, and the other wire harnesses 300 are individually surrounded by one first sealing groove 411; alternatively, one first sealing groove 411 simultaneously surrounds the second wire harness and the fourth wire harness, and the other wire harnesses 300 are individually surrounded by one first sealing groove 411; or alternatively, one first sealing groove 411 simultaneously surrounds the third wire harness and the fourth wire harness, and the other wire harnesses 300 are individually surrounded by one first sealing groove 411. There are many combinations for the number of first sealing grooves 411, which will not be described one by one here.

[0045] In some embodiments, the mounting box 100 is a one-piece structure, and the circuit board body 200 is formed outside the circuit board body 200 to surround the circuit board body 200 inside the mounting box 100 to protect the circuit board body 200. When prepared, the wire harnesses 300 connected to the circuit board body 200 pass through the wire arrangement holes 120. The mounting box 100 is connected to the inner wall of the battery pack 800. When the circuit board body 200 needs to be replaced, the wire harnesses 300 are disassembled through the wire arrangement holes 120, and then the mounting box 100 is disassembled from the inner wall of the battery pack 800 for replacement. When the circuit board 200 needs to be repaired, the mounting box 100 needs to be disassembled from the inner wall of the battery pack 800, that is, the mounting box 100 is scrapped and another mounting box 100 needs to be prepared. The present embodiment realizes the individual sealing of the circuit board body 200 to effectively protect the circuit board body 200, improves the maintenance convenience of the wire harnesses 300, and can realize the replacement and disassembly of the circuit board body 200.

[0046] In some embodiments, when the mounting box 100 is a one-piece structure, the circuit board body 200 can be sealed independently. That is, the mounting box 100 provided with the circuit board body 200 is installed in the battery pack 800. Alternatively, the mounting box 100 has an assembly opening 130 communicating with the accommodating cavity 110, and the circuit board body 200 is arranged in the accommodating cavity 110 to seal and connect the mounting box 100 with the battery pack 800. That is, the mounting box 100 is connected with the battery pack 800 by the structure of the battery pack 800 itself to achieve the sealing of the circuit board body 200. The sealing form of the circuit board body 200 in the present embodiment is not limited in particular, as long as the circuit board body 200 is arranged in the accommodating cavity 110 of the mounting box 100.

[0047] In some embodiments, referring to FIG. 1 and FIG. 8, FIG. 8 is a cross-sectional view of the overall structure of the circuit board assembly provided by the present embodiment. The mounting box 100 is connected with the inner wall of the battery pack 800. The mounting box 100 has an assembly opening 130 communicating with the accommodating cavity 110, and the circuit board assembly further includes a cover body 600, which is sealingly connected with the mounting box 100 and covers the assembly opening 130. That is, the mounting box 100 is a split structure, the circuit board body 200 is arranged in the accommodating cavity 110, and then the cover body 600 is sealingly connected with the mounting box 100 to achieve the sealing of the circuit board body 200. When the circuit board body 200 needs to be replaced or repaired, the present embodiment can achieve the disassembly of the wiring harness 300 through the wire routing hole 120, and then the connection between the cover body 600 and the mounting box 100 is released, so that the circuit board body 200 can be taken out from the accommodating cavity 110 for replacement or repair. The present embodiment realizes the independent sealing of the circuit board body 200, ensures the effective protection of the circuit board body 200, improves the maintenance convenience of the wiring harness 300, and can more conveniently replace and disassemble the circuit board body 200, and the mounting box 100 can be reused.

[0048] It should be noted that the mounting box 100 can be connected with the inner wall of the battery pack 800, the cover body 600 can be connected with the battery pack 800, the mounting box 100 can be connected with the battery pack 800, or the cover body 600 can be a cover plate of the battery pack 800 to seal the battery pack 800 and the mounting box 100 (see FIG. 9, which is a schematic view of the position of the circuit board assembly in the battery pack according to the present embodiment). This is not limited in particular.

[0049] Specifically, the assembly opening 130 can be an opening part on the upper surface of the mounting box 100, and of course, it can also be an opening part on other surfaces of the mounting box 100. It should be noted that when viewed from above, the opening shape of the assembly opening 130 can be rectangular or circular, which is not limited herein.

[0050] In some embodiments, referring to FIG. 2 and FIG. 3, FIG. 2 is a schematic diagram of the relationship between the wiring harness sealing cover and the wiring harness according to an embodiment of the present application, and FIG. 3 is a sectional view of the wiring harness sealing cover and the wiring harness according to an embodiment of the present application. The first body 410 is provided with a first sealing groove 411 formed by a ring of protrusions on the side away from the mounting box 100. The sealing portion 420 is a sealing structure formed by curing the sealing glue in the first sealing groove 411, and the wiring harness hole 412 is sealed by the sealing portion 420. It should be noted that the first sealing groove 411 is a groove that is a whole ring and uninterrupted in the middle, so that the sealing portion 420 can form a complete sealing structure in the first sealing groove 411. The sealing glue can be glass glue, silicone rubber, etc., which is not limited in the present embodiment, as long as it can form a waterproof and airproof sealing structure after curing.

[0051] In some embodiments, the gap between the wiring harness hole 412 and the wiring harness 300 is 0.1-1 mm. In the present embodiment, the sealing glue cannot flow into the mounting box 100 from the gap between the wiring harness hole 412 and the wiring harness 300, and the corresponding sealing glue can be configured according to the gap before the glue is poured to achieve this.

[0052] In some embodiments, referring to FIG. 1, the circuit board assembly comprises a first sealing ring 500, which is arranged around the wire harness hole 120, and the wiring harness sealing cover 400 is sealingly connected to the mounting box 100 through the first sealing ring 500. It should be noted that the number of first sealing rings 500 is assumed to be a.

[0053] One first sealing ring 500 can be provided, that is, a=1, and the first sealing ring 500 surrounds all the wire harness holes 120. When the number of wire harness holes 120 is m=4, the four wire harness holes 120 are respectively referred to as the first wire harness hole, the second wire harness hole, the third wire harness hole, and the fourth wire harness hole, and the number of first sealing rings 500 is a=1, the first sealing ring 500 surrounds the first wire harness hole, the second wire harness hole, the third wire harness hole, and the fourth wire harness hole.

[0054] Alternatively, one first sealing ring 500 can be provided around each wire harness hole 120, that is, the number of first sealing rings 500 is consistent with the number of wire harness holes 120, that is, a=m. When the number of wire harness holes 120 is m=4, the four wire harness holes 120 are respectively referred to as the first wire harness hole, the second wire harness hole, the third wire harness hole, and the fourth wire harness hole, and the number of first sealing rings 500 is a=m, one first sealing ring 500 is provided around each of the first wire harness hole, the second wire harness hole, the third wire harness hole, and the fourth wire harness hole.

[0055] Alternatively, all the wire harness holes 120 can be divided into b groups of wire harness holes, b satisfying 1 < b < a, and the number of wire harness holes 120 in each group of wire harness holes can be the same or different. When the number of wire harness holes 120 is m = 4, the four wire harness holes 120 are respectively referred to as a first wire harness hole, a second wire harness hole, a third wire harness hole, and a fourth wire harness hole, and the number of first sealing rings 500 is a = 3, one first sealing ring 500 simultaneously surrounds the first wire harness hole and the second wire harness hole, and the other wire harness holes 120 are individually surrounded by one first sealing ring 500; alternatively, one first sealing ring 500 simultaneously surrounds the first wire harness hole and the third wire harness hole, and the other wire harness holes 120 are individually surrounded by one first sealing ring 500; alternatively, one first sealing ring 500 simultaneously surrounds the first wire harness hole and the fourth wire harness hole, and the other wire harness holes 120 are individually surrounded by one first sealing ring 500; alternatively, one first sealing ring 500 simultaneously surrounds the second wire harness hole and the third wire harness hole, and the other wire harness holes 120 are individually surrounded by one first sealing ring 500; alternatively, one first sealing ring 500 simultaneously surrounds the second wire harness hole and the fourth wire harness hole, and the other wire harness holes 120 are individually surrounded by one first sealing ring 500; or alternatively, one first sealing ring 500 simultaneously surrounds the third wire harness hole and the fourth wire harness hole, and the other wire harness holes 120 are individually surrounded by one first sealing ring 500. There are many combinations for the number of first sealing rings 500, which will not be described one by one here. That is, the first sealing ring 500 seals the wire harness hole 120 in the present embodiment.

[0056] In some embodiments, referring to FIG. 4, which is a diagram of the overall structure of the wiring harness sealing cover provided in the present application. The wiring harness sealing cover 400 has a second sealing groove 430, which is arranged on the side of the wiring harness sealing cover 400 facing the mounting box 100, and the first sealing ring 500 is embedded in the second sealing groove 430. It should be noted that the number of second sealing grooves 430 is consistent with the number of first sealing rings 500, and the arrangement position of the second sealing groove 430 corresponds to the mounting position of the first sealing ring 500. When the first sealing ring 500 is press-fitted between the second sealing groove 430 and the mounting box 100, the sealing between the wiring harness sealing cover 400 and the mounting box 100 is achieved, and the connection between the wiring harness sealing cover 400 and the mounting box 100 is achieved by using fasteners, thereby achieving the purpose of sealing and connection. In the present embodiment, the second sealing groove 430 limits the mounting position of the first sealing ring 500, which facilitates installation and provides better sealing effect.

[0057] In some embodiments, the circuit board assembly further comprises a first connecting portion 700, which is arranged around the assembly opening 130 and connected with the mounting box 100, and the mounting box 100 is sealingly connected with the cover body 600 through the first connecting portion 700.

[0058] Specifically, the first connecting part 700 comprises a second body 710 and a second sealing ring 720. The second body 710 is arranged around the assembly opening 130 and connected with the mounting box 100. The second sealing ring 720 is arranged around the assembly opening 130, and the second body 710 is sealingly connected with the mounting box 100 through the second sealing ring 720. The first connecting part 700 has a third sealing groove 730, and the second sealing ring 720 is embedded in the third sealing groove 730. When the second sealing ring 720 is pressed between the second body 710 and the cover 600, the sealing between the first connecting part 700 and the cover 600 is achieved. The connection between the first connecting part 700 and the cover 600 is achieved by using fasteners. In the embodiment, the sealing between the mounting box 100 and the cover 600 is achieved by embedding the second sealing ring 720 in the third sealing groove 730, and the connection between the mounting box 100 and the cover 600 is achieved by using fasteners, so that the purpose of sealing connection is achieved.

[0059] In some embodiments, referring to FIG. 6, which is a schematic diagram of the position of the rib provided by the embodiment of the application. The first connecting part 700 further comprises at least one rib 740, which is connected with the second body 710 and arranged in the third sealing groove 730. The rib 740 can be a ring-shaped protruding structure arranged around the assembly opening 130. It should be noted that when the first connecting part 700 is sealingly connected with the cover 600, the second sealing ring 720 is pressed on the rib 740 and covers the entire third sealing groove 730. In the embodiment, the rib 740 is arranged to make the sealing between the first connecting part 700 and the cover 600 better.

[0060] Correspondingly, the application provides a battery pack comprising the circuit board assembly of the above embodiments, which will not be described here.

[0061] Correspondingly, the application provides a battery pack comprising the circuit board assembly of the above embodiments, which will not be described here.

[0062] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0063] The circuit board assembly, the battery pack and the energy storage system provided by the embodiments of the present application are described in detail, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment description is only used to help understand the technical solutions of the present application and the core ideas thereof. Those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A circuit board assembly, wherein, The circuit board assembly is arranged in a battery pack (800), and the circuit board assembly comprises: A mounting box (100) having a receiving cavity (110) and a wire hole (120) in communication with the receiving cavity (110); A circuit board body (200) arranged in the receiving cavity (110); A wire harness (300) connected with the circuit board body (200) and arranged in the wire hole (120); A wire harness sealing cover (400) comprising a first body (410) and a sealing part (420), the first body (410) is sealingly connected with the mounting box (100) and covers the wire hole (120), the first body (410) is provided with a first sealing groove (411) in communication with the wire hole (120), the first body (410) is further provided with a wire harness hole (412) in communication with the first sealing groove (411) and the wire hole (120), the wire harness (300) is arranged in the wire hole (120), the wire harness hole (412) and the first sealing groove (411), and the sealing part (420) is arranged in the first sealing groove (411) and covers the wire harness hole (412).

2. The circuit board assembly of claim 1, wherein, The wire harness sealing cover (400) is sealingly connected with the mounting box (100) through the first sealing ring (500).

3. The circuit board assembly of claim 2, wherein, The wire harness sealing cover (400) has a second sealing groove (430) arranged on a side of the wire harness sealing cover (400) facing the mounting box (100), and the first sealing ring (500) is embedded in the second sealing groove (430).

4. The circuit board assembly of claim 1, wherein, The mounting box (100) has an assembly opening (130) in communication with the receiving cavity (110), and the circuit board assembly further comprises: A cover body (600) sealingly connected with the mounting box (100) and arranged on the assembly opening (130).

5. The circuit board assembly of claim 4, wherein, The first connecting part (700) is arranged around the assembly opening (130) and connected with the mounting box (100), and the mounting box (100) is sealingly connected with the cover body (600) through the first connecting part (700).

6. The circuit board assembly of claim 5, wherein, The first connecting part (700) comprises: A second body (710) arranged around the assembly opening (130) and connected with the mounting box (100); A second sealing ring (720) arranged around the assembly opening (130), and the second body (710) is sealingly connected with the mounting box (100) through the second sealing ring (720).

7. The circuit board assembly of claim 6, wherein, The first connecting part (700) has a third sealing groove (730), and the second sealing ring (720) is embedded in the third sealing groove (730).

8. The circuit board assembly of claim 7, wherein, The first connecting part (700) further comprises at least one rib (740) connected with the second body (710), and the rib (740) is arranged in the third sealing groove (730).

9. The circuit board assembly of claim 1, wherein, The gap between the wire harness hole (412) and the wire harness (300) is 0.1-1mm.

10. A battery pack, wherein, The battery pack (800) comprises the circuit board assembly according to any one of claims 1-9.

11. An energy storage system, wherein, The battery pack (800) comprises the circuit board assembly according to any one of claims 1-9. The battery pack (800) comprises the circuit board assembly according to any one of claims 1-9.

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