BMS structure, box cover assembly and battery pack

Abstract

A BMS structure, a box cover assembly and a battery pack, the BMS structure comprises a shell, a cover plate, a first circuit board and a second circuit board, the shell is provided with a containing cavity with an opening in one end, the shell is used for being detachably connected with a box cover of the battery pack, and the opening of the containing cavity faces the interior of the battery pack; the cover plate covers the shell to seal the opening of the accommodating cavity, and a first jack and a second jack are formed in the cover plate; the first circuit board comprises a first substrate and a first plug arranged on the first substrate, the first substrate is accommodated in the accommodating cavity, and the first plug penetrates through the first jack; the second circuit board comprises a second substrate and a second plug arranged on the second substrate, the second substrate is contained in the containing cavity and located on the side, opposite to the cover plate, of the first substrate, and the second plug penetrates through the second jack. By means of the arrangement, occupation of the space in the bag can be reduced, mounting and dismounting of the BMS structure can be facilitated, and maintenance is more convenient.

Description

Technical Field

[0001] This invention relates to the field of battery pack technology, specifically to a BMS structure, a cover assembly, and a battery pack. Background Technology

[0002] A Battery Management System (BMS) is used to collect data such as battery voltage, current, and temperature in real time to prevent abnormal operation such as overcharging, over-discharging, and overheating, thereby extending battery life. The BMS is primarily designed to be installed outside the battery pack. This separate design requires additional installation space and support structures outside the battery pack, which is not conducive to large-scale energy storage applications.

[0003] With technological advancements and the rise of integrated design, some manufacturers have begun integrating the Battery Management System (BMS) into their battery pack designs. The mainstream approach involves assembling the BMS onto the battery pack's base plate, with the cover connecting to the base plate to enclose the BMS within the battery pack. This design requires a designated area on the base plate for BMS installation, which encroaches on internal space and makes maintenance relatively inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a BMS structure, a cover assembly, and a battery pack to solve the problems of BMS encroaching on the internal space of the pack and being inconvenient to maintain.

[0005] To achieve the objectives of this invention, the following technical solution is provided: In a first aspect, the present invention provides a BMS structure, comprising: A housing having a receiving cavity open at one end, the housing being detachably connected to the cover of a battery pack, and the opening of the receiving cavity facing the interior of the battery pack; A cover plate is provided on the housing, and the cover plate has a first insertion hole and a second insertion hole; A first circuit board includes a first substrate and a first connector disposed on the first substrate. The first substrate is housed in the receiving cavity, and the first connector passes through the first socket. The second circuit board includes a second substrate and a second connector disposed on the second substrate. The second substrate is housed in the receiving cavity and is located on the side of the first substrate facing away from the cover plate. The second connector passes through the second socket.

[0006] In one embodiment, the first substrate is provided with a clearance portion, and in the orthographic projection of the first substrate, the projection of the second socket falls into the projection of the clearance portion, and the second connector passes through the clearance portion.

[0007] In one embodiment, the cover plate includes a plate body and a first protrusion. The first protrusion is connected to the plate body. The first protrusion is recessed from the surface of the plate body away from the first substrate and protrudes from the surface of the plate body toward the first substrate. The first protrusion passes through the clearance portion, and the second insertion hole is formed on the first protrusion.

[0008] In one embodiment, the first boss includes a first top plate and a first side plate. One end of the first side plate is connected to the plate body, and the other end is connected to the first top plate. The first top plate is spaced apart from the plate body and is located between the first substrate and the second substrate. The second insertion hole is formed in the first top plate, and the first side plate is in close contact with the side wall of the clearance portion.

[0009] In one embodiment, the cover plate further includes a second protrusion, which is connected to the plate body. The second protrusion is recessed from the surface of the plate body toward the first substrate and protrudes from the surface of the plate body away from the first substrate. The first insertion hole is formed on the second protrusion.

[0010] In one embodiment, there are two second protrusions spaced apart, and the first protrusion is connected between the two second protrusions. Each second protrusion is provided with the first socket, and the number of first connectors is the same as the number of first sockets.

[0011] In one embodiment, the cover plate further includes a plurality of third protrusions. The plate body and the second protrusion are both connected to the third protrusions. The third protrusions are recessed from the surface of the plate body facing away from the first substrate and protrude from the surface of the plate body toward the first substrate. The first substrate is provided with a plurality of corresponding limiting holes. The plurality of third protrusions are correspondingly disposed in the plurality of limiting holes, and the third protrusions are in close contact with the sidewalls of the limiting holes. In one embodiment, the third protrusion includes a third top plate and a third side plate. One end of the third side plate is connected to the plate body or the second protrusion, and the other end is connected to the third top plate. The third top plate is spaced apart from the plate body and is located between the first substrate and the second substrate. The sidewall of the limiting hole is arc-shaped, and the third side plate is a corresponding arc-shaped part.

[0012] In one embodiment, at least one of the limiting holes communicates with the clearance portion, at least one of the third top plates is connected to the first top plate, and at least one of the third side panels is connected to the second boss.

[0013] In a second aspect, the present invention also provides a box cover assembly, including a box cover and a BMS structure as described in any one of the various embodiments of the first aspect, wherein the box cover has a window and the BMS structure is detachably connected to the box cover at the window.

[0014] Thirdly, the present invention also provides a battery pack, including a base plate, a battery module, and a cover assembly as described in the second aspect. The cover assembly is connected to the base plate and together encloses a receiving space, and the battery module is disposed on the base plate and received in the receiving space.

[0015] The BMS structure of this invention features a detachable connection between the housing and the cover, avoiding the need to install the BMS structure onto the bottom plate of the battery pack. This eliminates the need to reserve an area on the bottom plate for BMS installation, reducing encroachment on the internal space (accommodation space) of the pack. This allows for the maximum number of batteries to be installed, increasing battery capacity. By covering the opening of the receiving cavity with a cover plate facing the inside of the battery pack, the opening of the receiving cavity connects to the receiving space of the battery pack. A first connector and a second connector are provided on the cover plate, with a first connector passing through the first connector and a second connector passing through the second connector. This ensures that both the first and second connectors are exposed within the receiving space, facilitating electrical connection between the battery modules and other internal components within the receiving space and the first and second connectors. This design facilitates the installation and disassembly of the BMS structure and makes maintenance easier. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a battery pack according to one embodiment; Figure 2 This is a perspective view of a BMS structure according to one embodiment; Figure 3 This is a perspective view of the BMS structure of one embodiment; Figure 4 This is an exploded view of a BMS structure according to one embodiment; Figure 5 This is a partial three-dimensional structural view of a BMS structure according to one embodiment; Figure 6 This is a perspective view of a cover plate according to one embodiment.

[0018] Explanation of reference numerals in the attached figures: 1000-battery pack; 100 - Base plate, 200 - Box cover assembly; 10 - Box cover, 20 - BMS structure; 1-Shell, 11-Receiving cavity, 12-Flange, 121-Connecting hole; 2-Cover plate, 21-First insertion hole, 22-Second insertion hole, 23-Plate body, 24-First boss, 241-First top plate, 242-First side plate, 25-Second boss, 251-Second top plate, 252-Second side plate, 26-Third boss, 261-Third top plate, 262-Third side plate; 3-First circuit board, 31-First substrate, 311-Allowing part, 312-Limiting hole, 32-First connector; 4-Second circuit board, 41-Second substrate, 42-Second connector. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0021] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0022] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] Please refer to Figure 1 This invention provides a battery pack 1000, including a base plate 100, a battery module (not shown), and a cover assembly 200. The cover assembly 200 is connected to the base plate 100 and together encloses a receiving space. The battery module is disposed on the base plate 100 and received in the receiving space.

[0024] The base plate 100 supports the battery module and the cover assembly 200. The base plate 100 is used for mounting or placing onto a supporting structure (such as a support platform, battery cabinet, container, etc.). The battery module may include several batteries, which can be connected in series, parallel, or other connections to form a whole. One or more battery modules can be mounted on the base plate 100 without limitation.

[0025] The cover assembly 200 includes a cover 10 and a BMS (Battery Management System) structure 20. The cover 10 has a window (not shown in the figure), and the BMS structure 20 is detachably connected to the cover 10 at the window.

[0026] Optionally, the base plate 100 is generally flat. The lid 10 is formed by joining multiple plates, with the top and sides of the lid 10 also formed by plates. The bottom of the lid 10 is open, and the bottom of the lid 10 is connected to the base plate 100, which closes the bottom opening of the lid 10. Windows in the lid 10 can be located on the top or side plates, for example, such as... Figure 1 As shown, a window is provided on one of the side panels of the lid 10, and the BMS structure 20 is connected to the panel at the window. The base plate 100 and the lid 10 can be made of any feasible material such as alloy or plastic. The base plate 100 can be a one-piece molded structure, and the lid 10 can also be a one-piece molded structure, with no restrictions.

[0027] The BMS structure 20 can be detachably connected to the cover 10 using screws, snap-fit ​​connections, or other methods, without limitation. When maintaining the BMS, one specific embodiment involves removing the BMS structure 20 from the cover 10 without removing it from the base plate 100; another specific embodiment involves removing the entire cover assembly 200 from the base plate 100 before maintaining the BMS structure 20. Alternatively, after removing the cover assembly 200 from the base plate 100, the BMS structure 20 can be removed from the cover 10 for maintenance, or it can be maintained while the BMS structure 20 is still on the cover 10, without needing to remove it from the cover 10.

[0028] The battery pack 1000 of this embodiment adopts the cover assembly 200 of this embodiment. The cover assembly 200 includes a cover 10 and a BMS structure 20 detachably connected to the cover 10. The BMS structure 20 and the cover 10 are connected to form an integral whole, eliminating the need to leave an area on the base plate 100 for installing the BMS, reducing the encroachment on the internal space of the pack. The detachable design of the BMS structure 20 and the cover 10 also makes maintenance easier.

[0029] The BMS structure 20 of this embodiment will be described in detail below.

[0030] refer to Figures 1 to 4 The BMS structure 20 of this embodiment includes a housing 1, a cover plate 2, a first circuit board 3, and a second circuit board 4.

[0031] The housing 1 has a receiving cavity 11 with an opening at one end. The housing 1 is detachably connected to the cover 10 of the battery pack 1000, and the opening of the receiving cavity 11 faces the interior of the battery pack 1000. The structure of the housing 1 is similar to that of the aforementioned cover 10, and it can also be formed by connecting multiple plates, with one end open. This embodiment does not specifically limit the shape and structure of the housing 1. Optionally, the detachable connection between the housing 1 and the cover 10 can be by screwing, snap-fitting, etc., for example, such as... Figures 1 to 3 As shown, a flange 12 is provided on the outer peripheral surface of the opening end of the housing 1, which can be detachably connected to the cover 10 by screws or rivets passing through the connection holes 121 of the flange 12. The housing 1 can be a one-piece molded structure, made of insulating materials such as plastic, to achieve electrical isolation and prevent short circuits, electric shocks, or other abnormalities from occurring between the BMS and other structures or operators outside the battery pack 1000.

[0032] Combination Figures 3 to 5 The cover plate 2 is placed on the housing 1. The cover plate 2 can be connected to the housing 1 to close the opening of the receiving cavity 11, or it can be housed within the receiving cavity 11 and connected to the devices within the receiving cavity 11, preventing the devices from being directly exposed through the opening of the receiving cavity 11. The cover plate 2 is generally plate-shaped, and can be flat or uneven, without limitation. The cover plate 2 is made of insulating material to achieve electrical isolation, preventing short circuits, arcing, and other abnormalities between the BMS structure 20 and the conductive structures within the battery module and other packages. The cover plate 2 can be connected and fixed to the housing 1 by screwing, snapping, or bonding. The cover plate 2 has a first insertion hole 21 and a second insertion hole 22, which are spaced apart and both penetrate the cover plate 2. The shapes of the first insertion hole 21 and the second insertion hole 22 can be rectangular, circular, or any feasible shape, without limitation.

[0033] The first circuit board 3 includes a first substrate 31 and a first connector 32 disposed on the first substrate 31. The first substrate 31 is housed in a receiving cavity 11, and the first connector 32 passes through a first socket 21. The second circuit board 4 includes a second substrate 41 and a second connector 42 disposed on the second substrate 41. The second substrate 41 is housed in the receiving cavity 11 and is located on the side of the first substrate 31 facing away from the cover plate 2. The second connector 42 passes through a second socket 22.

[0034] The first substrate 31 and the second substrate 41 can be generally flat, generally parallel, and spaced apart in their respective thickness directions, with no limitation on the distance between them. The first substrate 31 is located between the second substrate 41 and the cover plate 2. The first substrate 31 and the cover plate 2 can also be spaced apart. The first substrate 31 can be connected to the cover plate 2 through an intermediate structure such as adhesive, and the cover plate 2 covers the first substrate 31 to prevent it from being directly exposed through the opening of the receiving cavity 11. The first substrate 31 and the second substrate 41 can be connected and fixed to the housing 1 and / or the cover plate 2, and can be fixed by means of screwing, snap-fitting, adhesive, etc.

[0035] The first connector 32 can be tightly attached to the side wall of the first socket 21, and the second connector 42 can be tightly attached to the side wall of the second socket 22 to achieve a seal and prevent gas, dust, etc. from flowing between the containment space and the receiving cavity 11 due to gaps, which may lead to abnormalities such as thermal runaway or arcing.

[0036] The first circuit board 3 may further include several first electronic devices (not shown) disposed on the first substrate 31. These first electronic devices may be, for example, chips, resistors, capacitors, inductors, connecting wires, etc., without limitation. The first electronic devices may be disposed on the surface of the first substrate 31 facing the cover plate 2, and / or on the surface of the first substrate 31 facing the second substrate 41. The first connector 32 is disposed on the surface of the first substrate 31 facing the cover plate 2 and is electrically connected to the first electronic devices. The second circuit board 4 may further include several second electronic devices (not shown) disposed on the second substrate 41. These second electronic devices may be, for example, chips, resistors, capacitors, inductors, connecting wires, etc., without limitation. The second electronic devices may be disposed on the surface of the second substrate 41 facing the first substrate 31, and / or on the surface of the second substrate 41 facing away from the first substrate 31. The second connector 42 is disposed on the surface of the second substrate 41 facing the cover plate 2 and is electrically connected to the second electronic devices. Since the first substrate 31 and the second substrate 41 are spaced apart, the space between the first substrate 31 and the second substrate 41 can be used to arrange a first electronic device and / or a second electronic device; since the first substrate 31 and the cover plate 2 are spaced apart, the space between the first substrate 31 and the cover plate 2 can be used to arrange a first electronic device. Optionally, there may also be a gap between the second substrate 41 and the bottom wall of the receiving cavity 11, so that the space between the second substrate 41 and the bottom wall of the receiving cavity 11 can be used to arrange a second electronic device.

[0037] The first connector 32 and the second connector 42 are used for electrical connection with the internal components of the battery pack 1000. Specifically, the physical connection and electrical connection are achieved simultaneously through plug-in connection. The plug-in connection is a pluggable and detachable connection method to facilitate the installation and removal of the BMS structure 20. The internal components of the battery pack 1000 may include battery modules, the thermal management system of the battery pack 1000, and the electrical system. When the first connector 32 and the second connector 42 are electrically connected to the internal components of the battery pack 1000, they can also be electrically connected to the signal acquisition harness of the battery module to monitor the voltage, current, and temperature of the battery module, prevent overcharging, over-discharging, and overheating, and ensure safe battery operation. They can also be electrically connected to the thermal management system to control the operation of the thermal management system according to the battery temperature, regulate the battery temperature, and maintain it within a suitable temperature range. They can also be electrically connected to the electrical system to control the charging, discharging, and overcharging of the battery, including pre-charging, charging, and discharging operations.

[0038] The BMS structure 20 can also be electrically connected to external devices such as energy storage controllers and vehicle controllers. When electrically connected to external devices of the battery pack 1000, the first connector 32 and / or the second connector 42 can communicate with the energy storage controller or vehicle controller to exchange battery status and energy storage demand information or vehicle demand information, and work collaboratively. It can also be electrically connected to a wireless communication module, enabling remote monitoring and management through connection to terminal devices such as smartphones. It can also be electrically connected to a display to show battery status information, such as remaining charge, voltage, and temperature, for convenient operation and viewing. Of course, electrical connection to external devices can also be achieved through other means, without using the first connector 32 and the second connector 42; there are no restrictions.

[0039] It should be understood that the embodiments of the present invention provide two circuit boards, namely the first circuit board 3 and the second circuit board 4, which can be assigned different functions as needed. Correspondingly, the first connector 32 and the second connector 42 are electrically connected to internal components or external devices with different functions. The number and distribution of the first connector 32 and the second connector 42 can be set as needed without limitation. Correspondingly, the number and distribution of the corresponding matching first socket 21 and second socket 22 on the cover plate 2 can be set.

[0040] The BMS structure 20 of this embodiment is detachably connected to the housing 1 and the cover 10, avoiding the need to install the BMS structure 20 on the bottom plate 100 of the battery pack 1000. This eliminates the need to leave an area on the bottom plate 100 for installing the BMS, reducing the encroachment on the internal space (accommodation space) of the pack. It allows for the maximum number of batteries to be installed, thus increasing battery capacity. By covering the opening of the receiving cavity 11 with a cover plate 2, and the opening facing the inside of the battery pack 1000, the opening of the receiving cavity 11 connects to the accommodation space of the battery pack 1000. A first insertion hole 21 and a second insertion hole 22 are provided on the cover plate 2, and a first connector 32 passes through the first insertion hole 21 and a second connector 42 passes through the second insertion hole 22. This ensures that both the first connector 32 and the second connector 42 are exposed in the accommodation space, so that the internal components such as the battery module in the accommodation space can be plugged into the first connector 32 and the second connector 42 to achieve electrical connection. This facilitates the installation and disassembly of the BMS structure 20 and makes maintenance easier.

[0041] Furthermore, the BMS structure 20 of this embodiment of the invention, by setting a first circuit board 3 and a second circuit board 4, can realize different functions by setting the first circuit board 3 and the second circuit board 4 respectively. The electronic devices that were originally arranged on one circuit board can be arranged on two circuit boards. The two circuit boards are arranged sequentially in their own thickness direction, which can avoid the circuit board area being too large or the electronic devices being too crowded. It is beneficial to arrange the required number of electronic devices in a compact space, and it is also beneficial for the BMS to realize more functions.

[0042] Optional, see reference Figures 3 to 5 The first substrate 31 has a clearance portion 311, which is aligned with the second socket 22, and the second connector 42 passes through the clearance portion 311. The alignment of the clearance portion 311 with the second socket 22 means that in the orthographic projection of the first substrate 31, the projection of the second socket 22 falls within the projection of the clearance portion 311. The clearance portion 311 can be a clearance notch, clearance hole, etc., and is not limited thereto.

[0043] The clearance portion 311 is used to avoid interference between the first substrate 31 and the second connector 42. Optionally, the clearance portion 311 can be a design similar to the second socket 22, that is, the clearance portion 311 is formed by forming through holes on the first substrate 31 that match the number, shape, and size of the second connector 42, and the second connector 42 passes through the clearance portion 311 and is tightly against the inner wall of the clearance portion 311. Optionally, the clearance portion 311 may not adopt a design similar to the second socket 22, and the clearance portion 311 can be formed by forming larger through holes on the first substrate 31, as long as it can avoid the second connector 42. For example, as shown in the figure... Figure 4As shown, the size of the clearance portion 311 is larger than the corresponding two second connectors 42, and the clearance portion 311 also penetrates one side of the first substrate 31, forming a clearance notch recessed from one side of the first substrate 31.

[0044] Optionally, refer to Figures 3 to 6 The cover plate 2 includes a plate body 23 and a first boss 24. The first boss 24 is connected to the plate body 23. The first boss 24 is recessed from the surface of the plate body 23 away from the first substrate 31 and protrudes from the surface of the plate body 23 toward the first substrate 31. The first boss 24 passes through the relief portion 311, and the second insertion hole 22 is opened on the first boss 24.

[0045] The cover plate 2 can be a one-piece structure, meaning the main body 23, the first boss 24, and all the bosses mentioned later can be integrally injection molded. The main body 23 can be a flat plate, and the first boss 24 protrudes from the side surface of the main body 23 facing the first substrate 31 in the thickness direction. In this embodiment, the shape of the clearance portion 311 can roughly match the first boss 24, so that the first boss 24 can be tightly attached to the side wall of the clearance portion 311, and the side wall of the clearance portion 311 can have a snap-fit ​​function for the first boss 24. Combined with the first connector 32 passing through the first socket 21, which also has a certain snap-fit ​​function, the first circuit board 3 and the cover plate 2 have a certain fixing effect through snap-fit. By setting the first boss 24, the cover plate 2 can be non-flat, and the first boss 24 can have a structural strengthening function, which can improve the overall structural strength of the cover plate 2. Furthermore, by providing a first protrusion 24 that passes through the clearance portion 311 and opening a second insertion hole 22 on the first protrusion 24, the second insertion hole 22 can be positioned closer to the second substrate 41. This facilitates the second connector 42 passing through the second insertion hole 22 and extending from the side of the cover plate 2 facing away from the first substrate 31. This is because the first connector 32 and the second connector 42 are standardized parts, and their shapes and sizes can be roughly the same. That is, the height of the first connector 32 protruding from the first substrate 31 is roughly equal to the height of the second connector 42 protruding from the second substrate 41. However, since the first substrate 31 is closer to the main body 23 and the second substrate 41 is farther from the main body 23, if the cover plate 2 is a flat plate of the main body 23 and the second insertion hole 22 is opened on the main body 23, the height of the second connector 42 protruding from the second substrate 41 may not be sufficient to pass through the second insertion hole 22.

[0046] Optional, see reference Figures 4 to 6 The first protrusion 24 includes a first top plate 241 and a first side plate 242. One end of the first side plate 242 is connected to the plate body 23, and the other end is connected to the first top plate 241. The first top plate 241 is spaced apart from the plate body 23. The first top plate 241 is located between the first substrate 31 and the second substrate 41. The second insertion hole 22 is opened in the first top plate 241. The first side plate 242 is in close contact with the side wall of the clearance portion 311.

[0047] The thicknesses of the board body 23, the first side surround plate 242, and the first top plate 241 may be substantially equal. The first top plate 241 may be a flat plate and may be parallel to the board body 23. The first side surround plate 242 may be a bent plate, a special-shaped plate such as a "U" shape, and the first side surround plate 242 may be perpendicular to the board body 23 and the first top plate 241. In the orthographic projection in the thickness direction of the board body 23, the first top plate 241 may be flush with the edge of a partial area of the board body 23, and the first side surround plate 242 is the intersection line at the flush edge. The first top plate 241 is located between the first base plate 31 and the second base plate 41, so that while the second plug 42 can pass through the second jack 22, the first boss 24 will not interfere with the second base plate 41. The number of the second jacks 22 may be 1, 2,..., so that the second circuit board 4 may have multiple second plugs 42 to achieve multiple functions. By providing that the first boss 24 includes the first top plate 241 and the first side surround plate 242, the structure is simple.

[0048] Optionally, referring to Figures 3 to 6 , the cover plate 2 further includes a second boss 25. The second boss 25 is connected to the board body 23. The second boss 25 is recessed from the surface of the board body 23 facing the first base plate 31 and protrudes from the surface of the board body 23 facing away from the first base plate 31. The first jack 21 is opened in the second boss 25.

[0049] The second boss 25 protrudes from the surface of the board body 23 on the side facing away from the first base plate 31 in the thickness direction of the board body 23. Similar to the aforementioned first boss 24, providing the second boss 25 can improve the structural strength of the cover plate 2. In addition, the second boss 25 is recessed from the surface of the board body 23 facing the first base plate 31, so that the recessed part of the first boss 24 can form a certain space for accommodating electronic devices, and can avoid interfering with the electronic devices on the side of the first base plate 31 facing the cover plate 2. The height by which the second boss 25 protrudes from the board body 23 is not limited, as long as the first plug 32 can pass through the first jack 21.

[0050] Optionally, referring to Figures 4 to 6 , the second boss 25 includes a second top plate 251 and a second side surround plate 252. One end of the second side surround plate 252 is connected to the board body 23, and the other end is connected to the second top plate 251. The second top plate 251 is located on the side of the board body 23 facing away from the first base plate 31. The first jack 21 is opened in the second top plate 251.

[0051] The thickness of the second side panel 252 and the second top panel 251 can be equal to that of the main body 23. The second top panel 251 can be a flat plate and parallel to the main body 23. The second side panel 252 can be a curved plate, a U-shaped plate, or other irregularly shaped plate. The second side panel 252 can be perpendicular to the main body 23 and the second top panel 251. In the orthographic projection of the thickness direction of the main body 23, the second top panel 251 can be flush with the edge of a portion of the main body 23, and the second side panel 252 is the intersection line at this flush edge. By setting the second boss 25, which includes the second top panel 251 and the second side panel 252, the structure is simple.

[0052] Optional, see reference Figures 4 to 6 The second protrusion 25 consists of two spaced-apart protrusions, and the first protrusion 24 is connected between the two second protrusions 25. Each second protrusion 25 has a first socket 21, and the number of first connectors 32 is the same as the number of first sockets 21.

[0053] The two second protrusions 25 have similar structures, each including a second top plate 251 and a second side plate 252, and the second top plates 251 of the two second protrusions 25 can be approximately on the same plane. The number of first insertion holes 21 opened on the two second protrusions 25 can be 1, 2, ..., and the number can be the same or different. For example, Figures 3 to 6 An embodiment is shown in which one of the second protrusions 25 has two first sockets 21, and the other second protrusion 25 has one first socket 21. By providing two second protrusions 25 and multiple first sockets 21, the first circuit board 3 can have multiple first connectors 32, realizing multiple functions.

[0054] Optional, see reference Figures 3 to 6 The cover plate 2 also includes a plurality of third protrusions 26. The plate body 23 and the second protrusion 25 are both connected to the third protrusions 26. The third protrusions 26 are recessed from the surface of the plate body 23 away from the first substrate 31 and protrude from the surface of the plate body 23 toward the first substrate 31. The first substrate 31 is provided with a plurality of corresponding limiting holes 312. The plurality of third protrusions 26 are correspondingly inserted into the plurality of limiting holes 312, and the third protrusions 26 are in close contact with the sidewalls of the limiting holes 312. The third protrusion 26 can have a similar structure to the first protrusion 24, and can also enhance the overall structural strength of the cover plate 2. The first substrate 31 has multiple limiting holes 312 and multiple third protrusions 26 corresponding to the multiple limiting holes 312. The sidewalls of the limiting holes 312 can limit and engage with the third protrusions 26, so that the first substrate 31 can be accurately positioned and limited with the cover plate 2, preventing them from moving or misaligning. At the same time, the close contact between the third protrusions 26 and the sidewalls of the limiting holes 312 can also seal the limiting holes 312, preventing the second electronic components of the second circuit board 4 from interfering with the first electronic components of the first circuit board 3 through the limiting holes 312.

[0055] Optional, see reference Figures 4 to 6 The third protrusion 26 includes a third top plate 261 and a third side plate 262. One end of the third side plate 262 is connected to the plate body 23 or the second protrusion 25, and the other end is connected to the third top plate 261. The third top plate 261 is spaced apart from the plate body 23. The third top plate 261 is located between the first substrate 31 and the second substrate 41. The side wall of the limiting hole 312 is arc-shaped, and the third side plate 262 is a corresponding arc-shaped.

[0056] The thickness of the third side panel 262 and the third top panel 261 can be the same as that of the main body 23. The third top panel 261 can be a flat plate and parallel to the main body 23. The third side panel 262 can be a curved plate, a U-shaped plate, or other irregularly shaped plate. The third side panel 262 can be perpendicular to the main body 23 and the third top panel 261. In the orthographic projection of the main body 23 along its thickness direction, the third top panel 261 can be flush with the edge of a portion of the main body 23, and the third side panel 262 is the intersection line at this edge. The third top panel 261 can be on the same plane as the first top panel 241. By setting the third boss 26, which includes the third top panel 261 and the third side panel 262, the structure is simple.

[0057] The number of third protrusions 26 is not limited and can be 2, 3, etc. Multiple third protrusions 26 can be evenly distributed to achieve uniform positioning and limiting effects. Optionally, at least one limiting hole 312 communicates with the clearance portion 311, at least one third top plate 261 is connected to the first top plate 241, and at least one third side plate 262 is connected to the second protrusion 25. For example, refer to... Figure 4 Only Figure 6 Each end of the clearance portion 311 (the two ends of the two first protrusions 24 in the opposite direction) is connected to a limiting hole 312, and each end of the first protrusion 24 is connected to a third protrusion 26. The two limiting holes 312 are approximately in the shape of a quarter circle arc, and the corresponding third side panel 262 is approximately in the shape of a quarter circle arc plate.

[0058] Optionally, the cover plate 2 may have multiple third protrusions 26 spaced apart around its perimeter. The third side plate 262 of the third protrusion 26 located at the four corners may be approximately a quarter-circular arc plate, and the third side plate 262 of the third protrusion 26 located at the other edges may be approximately a half-circular arc plate. Multiple limiting holes 312 may be set accordingly, which will not be described in detail.

[0059] In one specific embodiment, reference is made to Figures 3 to 6In the orthographic projection of the thickness direction of the main body 23, the cover plate 2 is roughly rectangular. The first protrusion 24 and the second protrusion 25 are both located at the edge of one long side of the rectangle of the cover plate 2. Four second protrusions 25 are provided along this long side. A third protrusion 26 is provided at each end of the long side of the rectangle. These two third protrusions 26 are connected to the second top plates 251 of the corresponding two second protrusions 25. Similarly, a third protrusion 26 is provided at each end of the first protrusion 24, and these two third protrusions 26 are connected to the second top plates 251 of the corresponding two second protrusions 25. That is, each second protrusion 25 has a third protrusion 26 at each end of the rectangle's length direction. Four second protrusions 25 are provided along the other long side of the rectangle of the cover plate 2. A third protrusion 26 is provided at each end of the long side, and two third protrusions 26 are provided in the middle. These four third protrusions 26 can be evenly spaced.

[0060] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0061] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A BMS structure (20), characterized in that, include: The housing (1) has a receiving cavity (11) with an opening at one end. The housing (1) is detachably connected to the cover (10) of the battery pack (1000), and the opening of the receiving cavity (11) faces the interior of the battery pack (1000). A cover plate (2) is provided on the housing (1), and the cover plate (2) has a first insertion hole (21) and a second insertion hole (22); The first circuit board (3) includes a first substrate (31) and a first connector (32) disposed on the first substrate (31). The first substrate (31) is housed in the receiving cavity (11), and the first connector (32) passes through the first socket (21). The second circuit board (4) includes a second substrate (41) and a second connector (42) disposed on the second substrate (41). The second substrate (41) is housed in the receiving cavity (11) and the second substrate (41) is located on the side of the first substrate (31) facing away from the cover plate (2). The second connector (42) passes through the second socket (22).

2. The BMS structure (20) according to claim 1, characterized in that, The first substrate (31) is provided with a clearance portion (311). In the orthographic projection of the first substrate (31), the projection of the second socket (22) falls into the projection of the clearance portion (311), and the second connector (42) passes through the clearance portion (311).

3. The BMS structure (20) according to claim 2, characterized in that, The cover plate (2) includes a plate body (23) and a first boss (24). The first boss (24) is connected to the plate body (23). The first boss (24) is recessed from the surface of the plate body (23) away from the first substrate (31) and protrudes from the surface of the plate body (23) toward the first substrate (31). The first boss (24) passes through the relief portion (311). The second insertion hole (22) is opened on the first boss (24).

4. The BMS structure (20) according to claim 3, characterized in that, The first boss (24) includes a first top plate (241) and a first side plate (242). One end of the first side plate (242) is connected to the plate body (23), and the other end is connected to the first top plate (241). The first top plate (241) is spaced apart from the plate body (23). The first top plate (241) is located between the first substrate (31) and the second substrate (41). The second insertion hole (22) is opened in the first top plate (241). The first side plate (242) is in close contact with the side wall of the clearance part (311).

5. The BMS structure (20) according to claim 3, characterized in that, The cover plate (2) further includes a second boss (25), which is connected to the plate body (23). The second boss (25) is recessed from the surface of the plate body (23) toward the first substrate (31) and protrudes from the surface of the plate body (23) away from the first substrate (31). The first insertion hole (21) is formed on the second boss (25).

6. The BMS structure (20) according to claim 5, characterized in that, The second protrusion (25) consists of two spaced-apart protrusions, and the first protrusion (24) is connected between the two second protrusions (25). Each second protrusion (25) is provided with the first socket (21), and the number of the first connectors (32) is the same as the number of the first sockets (21).

7. The BMS structure (20) according to claim 5, characterized in that, The cover plate (2) also includes a plurality of third protrusions (26). The plate body (23) and the second protrusion (25) are both connected to the third protrusions (26). The third protrusions (26) are recessed from the plate body (23) away from the surface of the first substrate (31) and protrude from the plate body (23) toward the surface of the first substrate (31). The first substrate (31) is provided with a plurality of corresponding limiting holes (312). The plurality of third protrusions (26) are respectively inserted through the plurality of limiting holes (312), and the third protrusions (26) are in close contact with the sidewalls of the limiting holes (312).

8. The BMS structure (20) according to claim 7, characterized in that, The third protrusion (26) includes a third top plate (261) and a third side plate (262). One end of the third side plate (262) is connected to the plate body (23) or the second protrusion (25), and the other end is connected to the third top plate (261). The third top plate (261) is spaced apart from the plate body (23). The third top plate (261) is located between the first substrate (31) and the second substrate (41). The sidewall of the limiting hole (312) is arc-shaped, and the third side plate (262) is a corresponding arc-shaped.

9. The BMS structure (20) according to claim 8, characterized in that, At least one of the limiting holes (312) is connected to the avoidance part (311), at least one of the third top plates (261) is connected to the first top plate (241), and at least one of the third side panels (262) is connected to the second boss (25).

10. A box cover assembly (200), characterized in that, Includes a lid (10) and a BMS structure (20) as described in any one of claims 1 to 9, wherein the lid (10) has a window and the BMS structure (20) is detachably connected to the lid (10) at the window.

11. A battery pack (1000), characterized in that, The device includes a base plate (100), a battery module, and a cover assembly (200) as described in claim 10. The cover assembly (200) is connected to the base plate (100) and together encloses a receiving space. The battery module is disposed on the base plate (100) and received in the receiving space.

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