Circuit board, distribution box of battery pack, battery pack and electric equipment

Abstract

The utility model relates to a circuit board, a power distribution box of a battery pack, the battery pack and electric equipment, the circuit board is used for the power distribution box of the battery pack, and the circuit board comprises a mother board which is used for being installed on a shell of the power distribution box; the daughter board is provided with a circuit module and is used for being electrically connected with the mother board. Partial circuits of the circuit board are modularized to the daughter board, so that the daughter board can realize corresponding functions, namely modularization and standardization of partial circuits in the circuit board are realized. When different distribution boxes need to be developed, only the mother board can be redeveloped, the daughter board with the circuit module can be directly connected with the mother board after the mother board is determined, the daughter board has universality in the different distribution boxes, the circuit of the mother board is simplified due to the fact that part of the circuit of the circuit board is modularized to the daughter board, and the cost is reduced. The development period, development difficulty and development cost of the mother board can be reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of distribution box of battery pack, in particular, to a circuit board, a distribution box of battery pack, a battery pack and an electrical equipment. BACKGROUND

[0002] With the rapid development of new energy, as a key component of battery pack, the distribution box plays an important role in the charging and discharging process of the battery pack, and has an important influence on the service life, control strategy and high-voltage safety.

[0003] In the related art, the distribution box usually includes a shell, electrical elements installed in the shell, and a circuit board installed in the shell, and the circuit board is integrally formed with an integrated circuit to realize the power distribution management function of the distribution box. However, such design, when a new distribution box needs to be developed for different projects, due to the strong dependence of the circuit board design on the distribution box, the circuit boards of different distribution boxes cannot be borrowed from each other, and the circuit board needs to be developed again, which greatly reduces the development efficiency, wastes development resources, and increases the development cost. UTILITY MODEL CONTENT

[0004] The purpose of the present disclosure is to provide a circuit board, a distribution box of battery pack, a battery pack and an electrical equipment to at least partially solve the problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a circuit board for a distribution box of battery pack, comprising: a mother board for mounting to a shell of the distribution box; and a daughter board having a preset functional module and being electrically connected to the mother board.

[0006] Optionally, the preset functional module includes at least one of a master control module, a relay drive module, a detection module, a power supply module, an isolation module and a filter module.

[0007] Optionally, the daughter board is installed at a preset position of the mother board.

[0008] Optionally, the daughter board is provided with an electrical connection part, and the daughter board is installed on the mother board and electrically connected to the mother board through the electrical connection part.

[0009] Optionally, the electrical connection part has a preset structure.

[0010] Optionally, the daughter board has a plurality of electrical connection parts.

[0011] Optionally, the number of the daughter boards is a plurality, the preset position includes a plurality of first mounting positions, the plurality of first mounting positions are distributed along the board surface of the mother board, and a plurality of the daughter boards are respectively installed at the corresponding first mounting positions.

[0012] Optionally, the first mounting position is a mounting slot formed in the motherboard, and the plurality of daughter boards are arranged to extend into the mounting slots and be welded to the motherboard.

[0013] Optionally, the preset position includes a second mounting position, and the plurality of daughter boards are sequentially connected and mounted in the second mounting position.

[0014] Optionally, the plurality of daughter boards are sequentially stacked in a direction perpendicular to the board surface.

[0015] Optionally, the adjacent two of the plurality of sequentially stacked daughter boards are connected by plugging, and one of the adjacent two and the motherboard are connected by plugging.

[0016] Optionally, one side of the daughter board is provided with a male terminal, and the other side is provided with a female terminal matched with the male terminal.

[0017] According to a second aspect of the present disclosure, a power distribution box of a battery pack is provided, comprising a housing and the above-mentioned circuit board mounted in the housing.

[0018] Optionally, the housing comprises a main shell, a bottom cover mounted on the bottom of the main shell, and a top cover mounted on the top of the main shell, wherein the bottom cover and the top cover are respectively detachably connected with the main shell.

[0019] Optionally, the sidewall of the main shell is provided with a plurality of longitudinally extending guide slots, and each of the guide slots is provided with a clamping block near both ends, wherein the top cover is provided with a plurality of first lugs for shape matching into the corresponding guide slots, and the first lugs are provided with first clamping holes for the corresponding clamping blocks to extend into; the bottom cover is provided with a plurality of second lugs for shape matching into the corresponding guide slots, and the second lugs are provided with second clamping holes for the corresponding clamping blocks to extend into.

[0020] Optionally, a plurality of components are further included, and the housing is internally provided with a plurality of third mounting positions for mounting the corresponding components, and the motherboard is provided with a plurality of connectors corresponding to the plurality of third mounting positions for connecting the corresponding components.

[0021] Optionally, the housing is adapted to be mounted in the interior of the battery pack, and the material of the housing is plastic.

[0022] According to a third aspect of the present disclosure, a battery pack is provided, comprising the above-mentioned power distribution box of the battery pack.

[0023] According to a fourth aspect of the present disclosure, a power consumption device is provided, comprising the above-mentioned battery pack.

[0024] By the technical solution, the circuit board is designed in a form including a daughter board and a mother board, and the daughter board has preset function modules and is electrically connected with the mother board, that is, part of the circuit of the traditional circuit board (corresponding to the preset function modules) is arranged on the daughter board so that the circuit modules on the daughter board can realize the preset functions. In this way, when the daughter board fails, only the corresponding daughter board needs to be repaired or replaced, thereby reducing the maintenance cost and improving the repair efficiency. In addition, when different circuit boards of different distribution boxes need to be developed for different projects, only the mother board needs to be redeveloped, and after the mother board is determined, the daughter board with the preset function modules can be directly electrically connected with the mother board. The daughter board has universality in different distribution box projects, that is, no matter what type of distribution box needs to be developed, the preset function modules corresponding to the daughter board need to be used, and the daughter board can be directly used in the distribution box of the new project. Moreover, since part of the circuit modules of the circuit board are modularized to the daughter board, especially when most of the core circuit modules are modularized to the daughter board, the circuit of the mother board is simplified, so that the development cycle, difficulty and cost of the mother board can be reduced, and when the daughter board fails, the failed daughter board can be quickly replaced, and the usable daughter board in the scrapped product can be recycled for recycling.

[0025] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0027] Figure 1 is an exploded view of a circuit board according to the present disclosure;

[0028] Figure 2 is an exploded view of a distribution box according to the present disclosure;

[0029] Figure 3 is Figure 2 the exploded view of the distribution box shown in Figure 3 the circuit board and the shell are further exploded; Figure 2

[0030] Figure 4 is a schematic view of a daughter board according to the present disclosure;

[0031] Figure 5 is an exploded view of another circuit board according to the present disclosure;

[0032] Figure 6 is an exploded view of another distribution box according to the present disclosure; ​

[0033] Figure 7 is Figure 6 an exploded view of a distribution box shown in FIG. 1, wherein, Figure 7 on the basis of which the circuit board and the housing are further exploded; Figure 6

[0034] Figure 8 is a side view of a daughter board of the circuit board shown in FIG. 2; Figure 5

[0035] Figure 9 is a schematic view of a distribution box according to the present disclosure.

[0036] BRIEF DESCRIPTION OF DRAWINGS

[0037] 100 - housing; 110 - main housing; 111 - guide groove; 112 - clamping block; 120 - bottom cover; 121 - second lug; 122 - second clamping hole; 130 - top cover; 131 - first lug; 132 - first clamping hole; 140 - third mounting position; 200 - mother board; 210 - first mounting position; 211 - mounting groove; 220 - second mounting position; 230 - connector; 300 - daughter board; 301 - electrical connection part; 302 - board body; 310 - main control module daughter board; 320 - relay drive module daughter board; 330 - detection module daughter board; 340 - power supply module daughter board; 350 - isolation module daughter board; 360 - filter module daughter board; 400 - plug structure; 410 - male terminal; 420 - female terminal; 500 - component. DETAILED DESCRIPTION

[0038] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0039] In the present disclosure, the orientation words "top, bottom" are based on the position relationship between the relevant components and other components during actual use, for example, "top cover" and "bottom cover" are relative, and are intended to express that they are located on opposite sides of the main housing, and are located on the upper side and the lower side in the paper direction of the drawing. The "longitudinal extension" refers to the extension along the arrangement direction of the bottom cover and the top cover, which is also perpendicular to the board surface direction of the circuit board in the embodiments of the present disclosure.

[0040] In addition, in the present disclosure, the terms "first", "second", etc. are used to distinguish one element from another element, and do not have sequentiality and importance. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements, unless otherwise indicated.

[0041] ​​For the convenience of understanding the technical solutions of the present disclosure, the existing distribution box of the battery pack is first introduced briefly, which includes a shell, a circuit board and electrical components (such as main positive relay, main negative relay, pre-charging relay, etc.). The control circuit is integrated on the circuit board, which is used to control the electrical components of the distribution box to achieve multiple functions. However, such design requires the overall development of the circuit board when developing a new distribution box, which is high in development cost, long in development cycle and difficult to develop.

[0042] Based on the above technical problems, with reference to Figures 1-9 The present disclosure exemplarily shows a circuit board for the distribution box of the battery pack, which includes a mother board 200 for mounting to the shell 100 of the distribution box and a sub-board 300 having a preset function module and being electrically connected to the mother board 200. Here, the connection relationship between the sub-board 300 and the mother board 200 is not limited, and they can have a mechanical connection relationship or be two independent parts (without mechanical connection) as long as they are electrically connected to enable the circuit board to achieve the required functions. In other words, in the present disclosure, the sub-board 300 and the mother board 200 are electrically connected to achieve all the functions of the traditional circuit board of the existing technology. In the embodiments of the present disclosure, the number of sub-boards 300 can be one, three, five, etc., which can be adaptively designed according to actual needs.

[0043] It should be explained that the preset function module here refers to the part of the circuit module in the integrated circuit board that can achieve the related functions. The part of the circuit module is "disassembled" and modularized to the sub-board 300 to form the preset function module, which is essentially a circuit module that can achieve the preset function. The preset function module can specifically achieve at least one of the functions mentioned below, such as driving relay, power supply, control, detection, isolation of high voltage, filtering, etc. Of course, it is not limited to the functions mentioned below, and the present disclosure does not limit the functions achieved by the preset function module. The preset function module can include electrical components (such as diodes, resistors, etc.) and wires (such as welded metal materials, etching resistors), etc., which can be adaptively designed according to the functions required to be achieved by each sub-board 300.

[0044] By using the technical solution, the circuit board is designed in the form of including a daughter board and a mother board, and the daughter board has preset function modules and is electrically connected with the mother board, that is, part of the circuit of the traditional circuit board (corresponding to the preset function modules) is arranged on the daughter board 300 so that the circuit modules on the daughter board 300 can realize the preset functions. In this way, when the daughter board 300 fails, only the corresponding daughter board 300 needs to be repaired or replaced, thereby reducing the maintenance cost and improving the maintenance efficiency. In addition, when different circuit boards of distribution boxes need to be developed for different projects, only the mother board 200 needs to be redeveloped, and after the mother board 200 is determined, the daughter board 300 with the preset function modules can be directly connected with the mother board 200, and the daughter board 300 has universality in different distribution box projects, that is, no matter what type of distribution box needs to be developed, the preset function modules corresponding to the daughter board 300 need to be used, and the daughter board 300 can be directly used in the distribution box of the new project. Moreover, since part of the circuit of the circuit board is modularized to the daughter board 300, especially most of the core circuit modules are modularized to the daughter board 300, the circuit of the mother board 200 is simplified, so that the development cycle, development difficulty and development cost of the mother board 200 can be reduced, and when the daughter board 300 fails, the failed daughter board 300 can be quickly replaced, and the usable daughter board 300 in the scrapped product can be recycled for recycling.

[0045] As described above, the preset function modules are not limited in the present disclosure, and in the embodiments of the present disclosure, the preset function modules can include at least one of a master control module 310, a relay drive module 320, a detection module 330, a power supply module 340, an isolation module 350 and a filter module 360. For example, the preset function modules can include one of the master control module 310, the relay drive module 320, the detection module 330, the power supply module 340, the isolation module 350 and the filter module 360, or can also include two, three or the like of the master control module 310, the relay drive module 320, the detection module 330, the power supply module 340, the isolation module 350 and the filter module 360. Since each of the foregoing specific function modules is a common basic function module of the distribution box, such design can improve the universality of the daughter board 300 in different distribution boxes.

[0046] It needs to be explained that the master module 310, the relay drive module 320, the detection module 330, the power supply module 340, the isolation module 350 and the filter module 360 here refer to the modularization or standardization of each part circuit in the traditional integrated circuit board for realizing the corresponding functions to the corresponding subboard 300 to form the master module subboard, the relay drive module subboard, the detection module subboard, the power supply module subboard, the isolation module subboard or the filter module subboard (hereinafter no longer explained about the master module subboard, the relay drive module subboard, the detection module subboard, the power supply module subboard, the isolation module subboard or the filter module subboard, which represents different kinds of subboards 300). In other words, the subboard 300 belongs to the splitting and standardization and modularization of the part circuit in the traditional integrated circuit board which can realize the preset function to the subboard 300, when the subboard 300 is connected to the mother board 200, the whole function of the traditional circuit board can be realized, the modularized subboard 300 has strong universality and replaceability in different distribution boxes, which can be directly borrowed without redeveloping for different distribution boxes.

[0047] The following will be introduced for each of the foregoing specific functional modules, specifically: the main control module 310 can be used for information interaction with the whole vehicle, battery pack and the like, thereby issuing signal instructions and the like to other parts of the circuit board or other electrical elements of the distribution box, for example, the specific functions can be at least one or a combination of multiple of the following: communication with the whole vehicle power network, charging CAN (Controller Area Network) communication, circuit board temperature monitoring, wake-up signal, and the like; the relay driving module 320 can be used for driving related relays, specifically, at least one or a combination of multiple of the following: heating relay, pre-charging relay, main positive relay, main negative relay, direct current charging positive fast relay, direct current charging negative fast relay, and the like; the detection module 330 can be used for detecting the overall high-voltage condition of the battery pack and the like, or for transmitting the voltage information of each battery of the battery pack to the corresponding detection position (communication function), or both of the foregoing functions can be implemented, for example, the specific functions can be at least one or a combination of multiple of the following: battery pack PACK voltage (relay front end) sampling, battery bus LINK voltage (relay rear end) sampling, pack body leakage insulation detection, fuse blow detection, monitoring the voltage of each single cell of the entire pack body (communication function), and the like; the power supply module 340 can be used for providing voltage (power supply function) for one or more of the circuit board and electrical elements, specifically, +5.0V, +1.5V, +3.3V, and the like can be provided; the isolation module 350 can be used for isolating the low-voltage part of the circuit board or electrical elements from the high-voltage of the battery pack, or simultaneously providing power supply +12.0V and +5.0V and the like for the high-voltage detection IC (different from the above-mentioned detection module sub-board 330); the filtering module 360 can filter out invalid signals, improve the anti-interference characteristics of the circuit board system, and improve the system stability. Since the functions implemented by each of the functional modules mentioned in the foregoing introduction are well known to those skilled in the art, no further explanation is given here. In addition, it should be noted that the functions of the preset functional modules of each sub-board 300 are not limited to the foregoing, as long as they include one of the foregoing functions, they can be defined as the foregoing main control module 310, relay driving module 320, detection module 330, power supply module 340, isolation module 350, or filtering module 360. In addition, the circuit modules of each sub-board 300 do not necessarily require only to implement the single function corresponding thereto, in some embodiments, the sub-board 300 can also simultaneously implement multiple of the foregoing functions, in which case the circuit of the functional module is more complex, for example, in some embodiments, in addition to having the circuit for implementing the function of "information interaction with the whole vehicle, battery pack and the like, thereby issuing signal instructions and the like to other parts of the circuit board or electrical elements of the distribution box" mentioned above, the main control module sub-board can also have the circuit corresponding to the detection module 330 at the same time, which is not limited by the present disclosure.In other words, when a sub-board 300 has both the master module 310 and the detection module 330, the sub-board 300 can be defined as a master module sub-board or a detection module sub-board, both of which meet the content of the present disclosure, i.e., any combination of the functional modules achieving the above functions and modularized to a sub-board 300 can fall within the protection scope of the present disclosure, and the specific combination mode can be adaptively designed according to the actual situation. It should be noted that the present disclosure aims to provide a concept of modularizing the circuit part corresponding to part of the functions of an integrated circuit board to a sub-board 300 to achieve the universality between different distribution boxes, and does not strictly limit the specific content of the preset functional module corresponding to each sub-board 300.

[0048] With reference to Figures 1-3 , Figures 5-7 In the embodiments of the present disclosure, the number of sub-boards 300 can be multiple. By setting multiple sub-boards 300 with preset functional modules, the circuit of the mother board 200 can be further simplified, i.e., the development difficulty, development cost and development cycle of the mother board 200 can be reduced to a greater extent. Moreover, setting multiple sub-boards 300 with preset functions can increase the combination selection of the sub-boards 300 when developing different distribution boxes.

[0049] For example, in the embodiment shown in Figure 1 , the number of sub-boards 300 can be 7, including one master module sub-board (with the master module 310), one relay drive module sub-board (with the relay drive module 310), two detection module sub-boards (with the detection module 330), one power supply module sub-board (with the power supply module 340), one isolation module sub-board (with the isolation module 350), and one filter module sub-board (with the filter module 360). Among them, the two detection module sub-boards can be used to achieve different functions, for example, one of them is used for high-voltage detection of the whole battery pack, and the other is used for communication in single-cell voltage detection of the battery pack.

[0050] In the embodiment shown in Figure 5 , the number of sub-boards 300 can be 3, the first sub-board 300 can include both the filter module 360 and the power supply module 340, which can be defined as a filter module sub-board or a power supply module sub-board, the second sub-board 300 can include the relay drive module 320, and the third sub-board 300 can include the detection module 330.

[0051] In embodiments of the present disclosure, the sub-plate 300 can further include a plate body 302, and the preset function modules can be arranged on the plate body 302. As described above, the preset function modules actually refer to circuit modules capable of achieving preset functions. For example, the master module sub-plate, the relay drive module sub-plate, the detection module sub-plate, the power supply module sub-plate, the isolation module sub-plate, and the filter module sub-plate can respectively include the plate body 302 and the corresponding circuit modules arranged on the plate body 302. As described above, the preset function modules can specifically include electrical components (such as diodes, resistors, etc.) and wires (such as welded metal materials, etched resistors), etc., which can be specifically designed according to the preset functions required to be achieved by each sub-plate 300.

[0052] With reference to Figure 2 and Figure 6 In embodiments of the present disclosure, the sub-plate 300 can be installed at a preset position of the mother plate 200, which can be specifically designed according to the layout of the plate surface of the circuit board. Installing the sub-plate 300 at the preset position of the mother plate 200 can improve the utilization rate of the internal space of the shell 100, make the internal structure more compact, and can simplify the internal circuit, avoid the need for electrical connection through wires, etc. between the sub-plate 300 and the mother plate 200. It should be noted that “installed at the mother plate 200” here can be direct installation or indirect installation, for example, when a plurality of sub-plates 300 are stacked and installed at the mother plate 200, the sub-plates 300 spaced apart from the mother plate 200 are indirectly installed.

[0053] In embodiments of the present disclosure, the sub-plate 300 can be provided with an electrical connection portion 301, and the sub-plate 300 can be installed at and electrically connected to the mother plate 200 through the electrical connection portion 301. In this way, the sub-plate 300 can be installed at and electrically connected to the mother plate 200 through the electrical connection portion 301, without the need to separately arrange mechanical connection and electrical connection, effectively simplifying the structure of the circuit board.

[0054] In the embodiments of the present disclosure, the electrical connection part 301 can have a preset configuration. By designing the electrical connection part 301 as the preset configuration, the specific structures of all the electrical connection parts 301 of all the sub-boards 300 can be the same, thereby further improving the versatility of the sub-boards 300, and the electrical connection part 301 can adopt a standardized interface, for example, a chip pin, or a plug-in terminal, and the like. Specifically, when the sub-board 300 is welded to the mother board 200, the electrical connection part 301 can be a metal needle pin; when the sub-board 300 is plug-in installed on the mother board 200, the electrical connection part 301 can be a male terminal or a female terminal as mentioned below. It should be noted that the present disclosure does not limit the size and arrangement position of the electrical connection part 301. In this way, the process difficulty of connecting the sub-board 300 and the mother board 200 (the connection process of each sub-board 300 is the same) can be simplified. On the other hand, since the structures of the electrical connection parts 301 of all the sub-boards 300 are the preset configuration, they are consistent, and thus the welding positions of the mother board 200 and each sub-board 300 can be the same, without the need to design different sub-boards 300, and without the need to consider the adaptability of the connection position of the sub-board 300 and the mother board 200, thereby reducing the development cost and the production cost.

[0055] With reference to Figure 4 In the embodiments of the present disclosure, the sub-board 300 can have a plurality of electrical connection parts 301. In this way, when the sub-board 300 is applied to different mother boards 200, since the structures of the mother boards 200 are different, the connection positions of the mother boards 200 and the sub-boards 300 can be different, and thus the sub-board 300 is provided with a plurality of electrical connection parts 301, which can improve the versatility of the sub-board 300, so as to meet the different connection positions of different mother boards 200. That is, the sub-board 300 can selectively use part of the electrical connection parts 301 when in use, and not all the electrical connection parts 301 need to be connected with the mother board 200.

[0056] The present disclosure does not limit the shape of the sub-board 300, with reference to Figure 4 In the embodiments of the present disclosure, the sub-board 300 can be configured as a quadrilateral structure, wherein at least three sides of the sub-board 300 can be provided with the electrical connection part 301. In some embodiments, all the four sides of the sub-board 300 can be provided with the electrical connection part 301, which is not limited by the present disclosure.

[0057] After understanding the main inventive concept of the present disclosure, two embodiments will be specifically introduced below to illustrate the mounting mode of the sub-board 300 mounted on the mother board 200, specifically: Figures 1-8

[0058] First Embodiment

[0059] With reference to Figures 1-3 ​In the embodiments of the present disclosure, the number of the sub-boards 300 can be multiple, the preset positions can include multiple first mounting positions 210, the multiple first mounting positions 210 can be distributed along the board surface of the mother board 200, and the multiple sub-boards 300 can be respectively mounted to the corresponding first mounting positions 210. In this way, the multiple sub-boards 300 are distributed and mounted to the mother board 200 along the board surface of the mother board 200, which can reduce the size of the circuit board in the thickness direction, thereby improving the space utilization. Moreover, the multiple sub-boards 300 are respectively mounted to the corresponding first mounting positions 210, which can avoid the mutual interference between different sub-boards 300, and facilitate the installation, maintenance, disassembly and the like of the sub-boards 300.

[0060] With reference to Figure 1 And Figure 3 In the embodiments of the present disclosure, the first mounting position 210 can be a mounting groove 211 opened in the mother board 200, and the multiple sub-boards 300 can be respectively at least partially inserted into the corresponding mounting grooves 211 and welded to the mother board 200. The welding connection can mechanically mount the sub-boards 300 to the mother board 200, and can also electrically connect the sub-boards 300 and the mother board 200. The welding connection is stable, the welding points are firm and not easy to fall off, and the service life of the circuit board is improved. By at least partially mounting the sub-boards 300 in the mounting grooves 211, the sub-boards 300 can avoid occupying too much space in the direction perpendicular to the board surface of the mother board 200. In actual installation, the sub-boards 300 can be partially inserted into the mounting grooves 211. In addition, in some other embodiments, the sub-boards 300 can also be fully inserted into the mounting grooves 211, which is not limited in the present disclosure. The present disclosure does not limit the setting position of the mounting groove 211, which can be adaptively designed according to the specific circuit distribution of the mother board 200.

[0061] In embodiments of the present disclosure, the sub-boards 300 and the mother board 200 can be connected by using a half-hole welding technique. Specifically, when drilling holes on the mother board 200, the depth and parameters of the drill bit are controlled so that the holes are only formed as half-holes on one side. Then the sub-boards 300 are installed to the mother board, ensuring that the half-holes are in contact with the sub-boards 300 and aligned with the half-hole positions. Finally, the sub-boards 300 are firmly connected to the welding points at the half-holes of the mother board 200 by welding technology (usually surface mounting technology such as hot air welding), to ensure stable electrical and mechanical connections. Half-hole welding can provide better electrical contact because the welding points are directly connected to the circuit layer inside the mother board 200, rather than just relying on surface welding. This method is more stable than ordinary plug-in or surface welding, reducing poor contact or disconnection caused by plug movement or vibration. In addition, the half-hole structure can increase the mechanical connection strength of the sub-boards 300 and the mother board 200, especially in high-vibration or high-temperature environments, which can better maintain stable connection. Compared with full-penetration holes, half-hole welding can save board space, allowing for higher-density component layout, improving the design flexibility and performance of the circuit board.

[0062] Referring to Figure 1 and Figure 3 In embodiments of the present disclosure, the mounting groove 211 can be a through groove that penetrates the mother board 200. In addition, in some other embodiments, the mounting groove 211 can also be a blind groove.

[0063] Second embodiment

[0064] Referring to Figures 5-7 In embodiments of the present disclosure, the preset position can include a second mounting position 220, and the number of sub-boards 300 can be multiple and can be sequentially connected and mounted to the second mounting position 220. Sequentially connecting and mounting multiple sub-boards 300 to the second mounting position 220 can avoid the sub-boards 300 occupying too much space on the board surface of the mother board 200, and can be achieved by only one second mounting position 220, effectively improving the designability of the circuit of the mother board 200 itself, and reducing the design size of the mother board 200 itself and production costs. In this case, one of the multiple sub-boards 300 can be directly connected to the mother board 200, and the rest can be indirectly connected to the mother board 200. It needs to be explained that the present disclosure does not limit the second mounting position 220, which depends on the connection method between the sub-boards 300 and the mother board 200. For example, when the sub-boards 300 and the mother board 200 are connected by the plug-in structure 400 mentioned below, the second mounting position 220 is the part of the plug-in structure 400 mounted to the mother board 200, such as the male terminal or the female terminal. Or, when the sub-boards 300 are welded to the mother board 200, the second mounting position 220 can be the aforementioned mounting groove 211 structure. The number of second mounting positions 220 can be one or two.

[0065] The disclosure does not limit the connection mode between the plurality of sub-boards 300, which can be inseparably welded to each other, for example. In addition, in some other embodiments, the two adjacent ones of the plurality of sub-boards 300 stacked in sequence and one of the adjacent mother boards 200 and the mother board 200 can be respectively connected by plugging. In this way, the power distribution box has strong expandability. When expanding the original circuit board to meet new needs, only the sub-boards 300 with corresponding circuit modules need to be developed and then stacked and inserted, which greatly improves the development efficiency of the expansion function. In addition, the plug-in structure 400 can ensure the stability and reliability of the connection during normal operation, and can also facilitate disassembly and maintenance and recycling of the sub-boards 300. Here, "stacked in sequence" means that the surfaces of the plurality of sub-boards 300 are parallel to each other and are arranged in sequence along a direction perpendicular to the surface of the mother board 200, and the two adjacent ones are connected to each other.

[0066] It should be noted that the plug-in structure 400 herein can be a simple mechanical connection, in which case each sub-board 300 needs to be electrically connected to the mother board 200. In addition, in some other embodiments, the plug-in structure 400 can simultaneously realize mechanical connection and electrical connection. Specifically, referring to Figures 5-8 In embodiments of the disclosure, one side of the sub-board 300 can be provided with a male terminal 410, and the other side can be provided with a female terminal 420 adapted to the male terminal 410. In this case, the mother board 200 needs to be installed with a male terminal 410 or a female terminal 420 connected to the sub-board 300. In this way, the mother board 200 and the two adjacent ones of the plurality of sub-boards 300 can simultaneously realize mechanical connection and electrical connection, effectively simplifying the circuit structure. And the male terminal 410 and the female terminal 420 can have a "locking" effect when they are plugged together to ensure connection stability and prevent them from falling off.

[0067] The disclosure does not limit the specific structure of the male terminal 410 and the female terminal 420. In some embodiments, the male terminal 410 can be made of metal or plastic and have pins or needles inside, and the number and arrangement of the pins can be determined according to actual needs; the female terminal 420 can also be made of metal or plastic and have holes or slots inside for receiving the pins or needles of the male terminal to form an electrical connection. In addition, in some other embodiments, the male terminal 410 and the female terminal 420 can also be provided with a locking structure for ensuring that the male terminal 410 and the female terminal 420 are firmly connected and do not loosen, which includes thread locking, clasp locking, buckle locking, etc. and can be locked by rotating, pushing or pressing, etc. When the male terminal 410 and the female terminal 420 need to be disassembled, they can be unlocked by reversing the rotation, pushing or pressing, etc. Since the structure and principle of the plug-in terminal including the male and female terminals are well known to those skilled in the art, they will not be described here.

[0068] In addition to the above-mentioned first and second embodiments, in some other embodiments, two adjacent ones of the plurality of sub-boards 300 stacked in sequence can be detachably connected through the plug-in structure 400, and one of the plurality of sub-boards 300 adjacent to the mother board 200 can be welded to the mother board 200. In this case, the second mounting position 220 can be the aforementioned mounting groove 211.

[0069] It should be noted that in the above embodiments, the connection mode of the sub-boards 300 and the mother board 200 is introduced only in the case where the number of sub-boards 300 is multiple. In fact, the number of sub-boards 300 is not limited by the present disclosure, for example, when the number of sub-boards 300 is one, it can also be welded to the mother board 200 through the aforementioned mounting groove 211, or it can also be mounted to the mother board 200 through the aforementioned plug-in structure 400, which is not limited by the present disclosure.

[0070] According to a second aspect of the present disclosure, a power distribution box of a battery pack is provided, comprising a housing 100 and the above-mentioned circuit board, the circuit board is installed in the housing 100, since the power distribution box of the battery pack has all the beneficial effects of the above-mentioned circuit board, which will not be repeated here.

[0071] Referring to Figures 2-3 , Figures 6-7 , Figure 9 In the embodiments of the present disclosure, the housing 100 can include a main shell 110, a bottom cover 120 mounted on the bottom of the main shell 110, and a top cover 130 mounted on the top of the main shell 110. Among them, the bottom cover 120 and the top cover 130 are detachably connected with the main shell 110. By providing the bottom cover 120 and the top cover 130, the electrical components and circuit boards in the main shell 110 can be sealed and protected. In addition, the detachable connection form facilitates disassembly, repair and assembly of the power distribution box.

[0072] The present disclosure does not limit the detachable connection mode of the bottom cover 120 and the top cover 130 with the main shell 110, for example, in Figures 2-3 , Figures 6-7 , Figure 9In the shown embodiment, the side wall of the main shell 110 can be provided with a plurality of longitudinally extending guide slots 111, each of which can be provided with a clamping block 112 at a position close to each end, where the longitudinal direction refers to the arrangement direction of the bottom cover 120 and the top cover 130, and the guide slots 111 can longitudinally extend through the side wall of the main shell 110. The guide slots 111 can be formed in two opposite side walls of the main shell 110, or can also be formed in four side walls, which is not limited in the present disclosure. Among them, the top cover 130 can be provided with a plurality of first lugs 131 for shape matchingly extending into the corresponding guide slots 111, and the first lugs 131 can be provided with first clamping holes 132 for the corresponding clamping blocks 112 to extend into; the bottom cover 120 can be provided with a plurality of second lugs 121 for shape matchingly extending into the corresponding guide slots 111, and the second lugs 121 can be provided with second clamping holes 122 for the corresponding clamping blocks 112 to extend into. In this way, when the bottom cover 120 and the top cover 130 are installed to the main shell 110, the first lugs 131 and the second lugs 121 are respectively extended into the guide slots 111 from both ends until the clamping blocks 112 extend into the corresponding first clamping holes 132 and second clamping holes 122. It should be noted that in this process, the first lugs 131 and the second lugs 121 need to be deformed so that the clamping blocks 112 can extend into the corresponding first clamping holes 132 and second clamping holes 122, and reset after the clamping blocks 112 extend into the corresponding first clamping holes 132 and second clamping holes 122. The deformation of the first lugs 131 and the second lugs 121 can be realized by configuring them as elastic materials, or when they are plastic materials, it can also be realized by their structure. In addition, in some other embodiments, the bottom cover 120 and the top cover 130 can be detachably installed to the main shell 110 by bolts and nuts.

[0073] Referring to Figures 2-3 , Figures 6-7In the embodiments of the present disclosure, the power distribution box of the battery pack can further include a plurality of components 500, and the shell 100 can be internally provided with a plurality of third mounting positions 140 for mounting the corresponding components 500, and the positions of the plurality of third mounting positions 140 on the mother board 200 can be respectively provided with connectors 230 for connecting the corresponding components 500. Here, the components 500 can include one or more of a heating relay, a pre-charging relay, a main positive relay, a main negative relay, a direct current charging positive fast relay, a direct current charging negative fast relay, etc. In this way, after the components 500 are mounted to the corresponding third mounting positions 140, the components 500 can be directly connected to the corresponding connectors 230 without the need for complicated wires, conductive sheets, etc. for electrical connection inside the power distribution box. By standardizing the positions of the connectors 230 on the mother board 200 and the positions of the third mounting positions 140 on the shell 100 (which can be on the main shell 110), when developing other power distribution boxes, the standardized positions can be directly used, reducing the development difficulty and cycle. The connectors 230 can be common terminal connectors, welding connectors, etc.

[0074] The present disclosure does not limit the material of the shell 100. For example, in the embodiments of the present disclosure, the shell 100 can be adapted to be mounted inside the battery pack, and the material of the shell 100 can be plastic. Mounting the shell 100 inside the battery pack can improve the compactness of the battery pack and simplify the connection between the battery pack and the power distribution box. Setting the material of the shell 100 to be plastic can insulate the shell 100 from the battery pack, avoid the formation of conduction by the metal shell, and plastic can reduce the weight of the power distribution box, which is beneficial to lightening.

[0075] According to a third aspect of the present disclosure, a battery pack is provided, which includes the power distribution box of the battery pack described above. Since the battery pack has all the beneficial effects of the power distribution box described above, they will not be described here.

[0076] According to a fourth aspect of the present disclosure, a power consumption device is provided, which includes the battery pack described above. Since the power consumption device has all the beneficial effects of the battery pack described above, they will not be described here.

[0077] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0078] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0079] Furthermore, various embodiments of the present disclosure can be arbitrarily combined with each other, as long as the idea of the present disclosure is not violated, and it should be considered as disclosed in the present disclosure.

Claims

1. A circuit board for a distribution box of a battery pack, characterized in that, The circuit board includes: Mother plate, the mother plate being used for mounting to the housing of the distribution box; and The sub-board has preset functional modules and is used for electrical connection to the motherboard.

2. The circuit board according to claim 1, characterized in that, The preset functional modules include at least one of the following: main control module, relay drive module, detection module, power supply module, isolation module, and filtering module.

3. The circuit board according to claim 1, characterized in that, The sub-board is installed at a preset position on the mother board.

4. The circuit board according to claim 3, characterized in that, The sub-board is provided with an electrical connection part, and the sub-board is installed on the motherboard and electrically connected to the motherboard through the electrical connection part.

5. The circuit board according to claim 4, characterized in that, The electrical connection portion has a predetermined structure.

6. The circuit board according to claim 4, characterized in that, The sub-board has a plurality of the electrical connection portions.

7. The circuit board according to any one of claims 3-6, characterized in that, The number of sub-boards is multiple, and the preset position includes multiple first mounting positions. The multiple first mounting positions are distributed along the surface of the mother board, and the multiple sub-boards are respectively mounted in the corresponding first mounting positions.

8. The circuit board according to claim 7, characterized in that, The first mounting position is a mounting groove formed in the mother plate, and the plurality of sub-plates extend at least partially into the corresponding mounting groove and are welded to the mother plate.

9. The circuit board according to any one of claims 3-6, characterized in that, The preset position includes a second mounting position, and the number of sub-boards is multiple, which are sequentially connected and installed in the second mounting position.

10. The circuit board according to claim 9, characterized in that, Multiple sub-boards are stacked sequentially along a direction perpendicular to the board surface.

11. The circuit board according to claim 10, characterized in that, The adjacent sub-boards and the sub-board adjacent to the mother board are respectively plugged in and plugged in.

12. The circuit board according to claim 11, characterized in that, The daughter board has a male terminal on one side and a female terminal that is compatible with the male terminal on the other side.

13. A distribution box for a battery pack, characterized in that, include: case; as well as The circuit board according to any one of claims 1-12, wherein the circuit board is mounted within the housing.

14. The distribution box for the battery pack according to claim 13, characterized in that, The housing includes a main shell, a bottom cover mounted on the bottom of the main shell, and a top cover mounted on the top of the main shell. The bottom cover and the top cover are detachably connected to the main shell.

15. The distribution box for the battery pack according to claim 14, characterized in that, The sidewall of the main shell is provided with multiple longitudinally extending guide grooves, and each guide groove is provided with a locking block near both ends. The top cover is provided with a plurality of first lugs that extend into the corresponding guide grooves in a matching shape, and the first lugs are provided with first locking holes for the corresponding locking blocks to extend into; the bottom cover is provided with a plurality of second lugs that extend into the corresponding guide grooves in a matching shape, and the second lugs are provided with second locking holes for the corresponding locking blocks to extend into.

16. The distribution box for the battery pack according to claim 13, characterized in that, It also includes multiple components, and the housing is provided with multiple third mounting positions for mounting the corresponding components. The motherboard is provided with connectors for connecting to the corresponding components at positions corresponding to the multiple third mounting positions.

17. The distribution box for the battery pack according to claim 13, characterized in that, The housing is adapted to be installed inside the battery pack, and the housing is made of plastic.

18. A battery pack, characterized in that, A distribution box comprising the battery pack according to any one of claims 13-17.

19. An electrical appliance, characterized in that, Includes the battery pack as described in claim 18.

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