A BMS board layout structure

Abstract

The utility model relates to a kind of BMS board layout structure, including BMS board;The BMS board includes the control part of middle part setting and the terminal part of both ends setting;The terminal part includes first terminal part, second terminal part, third terminal part, fourth terminal part;The first terminal part and second terminal part are located in the side of control part, and third terminal part and fourth terminal part are located in the other side of control part;The two sides of control part are also respectively provided with current detection part and MOS tube part.The utility model's terminal part is located in both ends, and it is convenient to connect with external equipment or battery group.Simultaneously B-terminal to P-terminal, B+ terminal to P+ terminal The distance is same, and the same resistance, less interference, can improve the detection accuracy of control part to current;Current detection part is located in the middle of first terminal part and second terminal part, and current can be accurately detected.MOS tube part is in the middle of third terminal part and fourth terminal part, and it is convenient to accurately control battery charging and discharging process.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a BMS board layout structure. Background Technology

[0002] With the increasing power and functionality of energy storage power supplies, the size and temperature rise of BMS control boards are also increasing, requiring more rational layout design and stronger heat dissipation solutions to meet the performance requirements of BMS. Existing BMS boards lack specific design for the B+ / B- and P+ / P- positions, easily leading to messy internal wiring; unclear functional zoning on the board results in concentrated heat sources and low heat dissipation efficiency; and the increasing size of BMS boards fails to consider the strength support of auxiliary structural components. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this utility model provides a BMS board layout structure.

[0004] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0005] A BMS board layout structure includes a BMS board; the BMS board includes a control section disposed in the middle and terminal sections disposed at both ends; the terminal sections include a first terminal section, a second terminal section, a third terminal section, and a fourth terminal section; the first terminal section and the second terminal section are located on one side of the control section, and the third terminal section and the fourth terminal section are located on the other side of the control section; the first terminal section and the third terminal section are disposed opposite to each other; the second terminal section and the fourth terminal section are disposed opposite to each other; a current detection section and a MOS transistor section are respectively disposed on both sides of the control section.

[0006] In one embodiment of this utility model, the first terminal portion and the second terminal portion are respectively disposed close to two opposite sides of the BMS board; the third terminal portion and the fourth terminal portion are respectively disposed close to two opposite sides of the BMS board.

[0007] In one embodiment of this utility model, the BMS board is rectangular; the first terminal portion, the second terminal portion, the third terminal portion, and the fourth terminal portion are all evenly distributed at the four corners of the BMS board.

[0008] In one embodiment of the present invention, the first terminal portion includes a plurality of B- terminals; the second terminal portion includes a plurality of P- terminals; the third terminal portion includes a plurality of B+ terminals; and the fourth terminal portion includes a plurality of P+ terminals.

[0009] In one embodiment of the present invention, the first terminal portion includes three B- terminals; the second terminal portion includes three P- terminals; the third terminal portion includes three B+ terminals; and the fourth terminal portion includes three P+ terminals.

[0010] In one embodiment of this utility model, the current sensing section is disposed between the first terminal section and the second terminal section; the MOS transistor section is disposed between the third terminal section and the fourth terminal section; the current sensing section includes a plurality of current sensing resistors; and the MOS transistor section includes a plurality of MOS transistors.

[0011] In one embodiment of this utility model, the BMS board is connected to a heat dissipation aluminum busbar; the heat dissipation aluminum busbar is connected to the current detection section, the control section, and the MOS transistor section respectively through an insulating and thermally conductive silicone layer.

[0012] In one embodiment of this utility model, the heat dissipation aluminum busbar includes two busbars respectively disposed on both sides of the BMS board; a connecting post is provided between the heat dissipation aluminum busbar and the BMS board; the two heat dissipation aluminum busbars are fixed to the BMS board by screws cooperating with the connecting post; the BMS board is provided with through holes for screws to pass through.

[0013] In one embodiment of this utility model, an output copper busbar is connected to the terminal portion.

[0014] The beneficial effects of this utility model are as follows: The terminal sections are located at both ends, facilitating connection to external devices or battery packs. Different terminal sections can correspond to different functions or connection objects; simultaneously, the distances from the B- terminal to the P- terminal and from the B+ terminal to the P+ terminal are the same, resulting in the same internal resistance and less interference, thus improving the current detection accuracy of the control unit; the current sensing section is located between the first and second terminal sections, enabling accurate current detection and providing reliable data for the BMS board to accurately monitor battery charging and discharging. The MOSFET section is located between the third and fourth terminal sections, facilitating precise control of the battery charging and discharging process and protecting the battery and other equipment from damage caused by overcurrent, overvoltage, etc. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure connecting the heat dissipation aluminum busbar of this utility model;

[0018] Figure 3 This is a schematic diagram of the output copper busbar structure of this utility model;

[0019] Explanation of reference numerals in the attached figures:

[0020] 100, BMS board; 101, Through hole; 110, Control unit; 120, First terminal unit; 121, B- terminal; 130, Second terminal unit; 131, P- terminal; 140, Third terminal unit; 141, B+ terminal; 150, Fourth terminal unit; 151, P+ terminal; 160, Current sensing unit; 161, Current sensing resistor; 170, MOSFET unit; 171, MOSFET; 180, Heat sink aluminum busbar; 181, Connecting post; 190, Screw; 200, Output copper busbar. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example:

[0025] like Figure 1 As shown, a BMS board layout structure includes a BMS board 100; the BMS board 100 includes a control unit 110 disposed in the middle and terminal units disposed at both ends; placing the control unit 110 in the middle of the BMS board 100 is beneficial for centralized management and coordination of the operation of the entire BMS system, facilitates efficient signal transmission and interaction with other parts, reduces signal transmission delay and interference, and improves the stability and reliability of the system.

[0026] In one embodiment, the terminal section includes a first terminal section 120, a second terminal section 130, a third terminal section 140, and a fourth terminal section 150. The first terminal section 120 and the second terminal section 130 are located on one side of the control section 110, and the third terminal section 140 and the fourth terminal section 150 are located on the other side of the control section 110. The first terminal section 120 and the third terminal section 140 are arranged opposite to each other; the second terminal section 130 and the fourth terminal section 150 are arranged opposite to each other. This layout provides a clear direction and area for internal wiring, avoiding the problem of messy wiring. A reasonable wiring path can be planned according to the position of the terminals, making the lines neater and more orderly, reducing line crossings and overlaps, reducing wiring difficulty, and also helping to improve electromagnetic compatibility and reduce electromagnetic interference. The terminal sections are located at both ends, facilitating connection with external devices or battery packs. Different terminal sections can correspond to different functions or connection objects.

[0027] In one embodiment, a current sensing section 160 and a MOSFET section 170 are respectively provided on both sides of the control unit 110. The current sensing section 160 is used to detect current, and the MOSFET section 170 is used to control the on / off state of the circuit and the magnitude of the current. Separating them from the control unit 110 makes the functional divisions on the board clearer. This avoids mutual interference between different functional modules, facilitates design, debugging and maintenance, and also helps improve the stability and reliability of the system. The heat sources are dispersed, avoiding the problem of low heat dissipation efficiency caused by concentrated heat sources. Both the current sensing section 160 and the MOSFET section 170 generate heat during operation. Placing them on both sides of the control unit 110 allows for a more even distribution of heat on the board, which is beneficial for dissipating heat through heat dissipation measures, improving heat dissipation efficiency, reducing temperature rise, and thus ensuring the performance and lifespan of the BMS board 100. The heat-generating devices on the left and right sides are far apart, and their temperatures do not affect each other.

[0028] In one embodiment, the first terminal portion 120 and the second terminal portion 130 are respectively disposed near two opposite sides of the BMS board 100; the third terminal portion 140 and the fourth terminal portion 150 are respectively disposed near two opposite sides of the BMS board 100. Distributing the terminals near the board edges facilitates the connection of external cables or devices to the BMS board 100 from different directions. In practical applications, the installation space and connection methods of devices may vary. This layout can better adapt to various installation environments and connection requirements, making the connection between the BMS board 100 and external devices more convenient and flexible, reducing the risk of installation errors or damage due to inconvenient connections. Current typically flows through the terminals, which may generate some heat. Distributing them at different edges of the board helps to distribute heat more evenly across the entire BMS board 100, preventing heat concentration in a certain area and thus improving heat dissipation. Simultaneously, the proximity to the board edges also facilitates heat dissipation to the surrounding environment through the board edges, which helps maintain the normal operating temperature of the BMS board 100 and improves its performance and stability. As the connection point between the BMS board 100 and the outside, the terminal section may be subjected to certain external forces during the connection process. By placing them on opposite sides of the board, the external forces can be distributed more evenly on the BMS board 100, avoiding local deformation or damage caused by the concentration of external forces in a certain area. This enhances the overall structural stability of the BMS board 100 and improves its resistance to external impacts.

[0029] In one embodiment, the BMS board 100 is rectangular; the first terminal portion 120, the second terminal portion 130, the third terminal portion 140, and the fourth terminal portion 150 are all evenly distributed at the four corners of the BMS board 100. The heat generated by the terminals during operation can be evenly dissipated through the four corners of the board, preventing heat from concentrating in a certain area. This helps maintain a balanced temperature across all parts of the BMS board 100, improves heat dissipation efficiency, ensures stable performance of the BMS board 100, and extends its service life.

[0030] In one embodiment, the first terminal section 120 includes a plurality of B- terminals 121; the second terminal section 130 includes a plurality of P- terminals 131; the third terminal section 140 includes a plurality of B+ terminals 141; and the fourth terminal section 150 includes a plurality of P+ terminals 151. In the battery management system (BMS), the negative terminal (B-) of the battery outputs current, which, after passing through various control and monitoring circuits of the BMS, is output from the P- terminal 131 to the load or other circuits; while when current flows in from an external power source or charging device, it enters the BMS from the P+ terminal 151, and after processing, flows to the positive terminal (B+) of the battery. By concentrating the B- terminals 121 in the first terminal section 120, the P- terminals 131 in the second terminal section 130, the B+ terminals 141 in the third terminal section 140, and the P+ terminals 151 in the fourth terminal section 150, the current inflow and outflow paths are very clear, facilitating the design and understanding of circuit principles, and also aiding in fault diagnosis and maintenance. Meanwhile, the distances from B-terminal 121 to P-terminal 131 and from B+terminal 141 to P+terminal 151 are the same, the internal resistance is the same, and there is less interference, which can improve the current detection accuracy of the control unit 110.

[0031] Separating terminals of different polarities according to the direction of current flow can reduce electromagnetic interference between adjacent terminals. For example, B- terminal 121 and B+ terminal 141 are located on opposite sides, with a large distance between them, which reduces the possibility of mutual interference of magnetic fields generated by current transmission. Similarly, the separate layout of P- terminal 131 and P+ terminal 151 also helps to reduce electromagnetic interference, improve the electromagnetic compatibility of the BMS system, and ensure stable system operation.

[0032] In one embodiment, the first terminal portion 120 includes three B- terminals 121; the second terminal portion 130 includes three P- terminals 131; the third terminal portion 140 includes three B+ terminals 141; and the fourth terminal portion 150 includes three P+ terminals 151.

[0033] In one embodiment, the current sensing section 160 is disposed between the first terminal section 120 and the second terminal section 130; the MOS transistor section 170 is disposed between the third terminal section 140 and the fourth terminal section 150; the current sensing section 160 includes several current sensing resistors 161; the MOS transistor section 170 includes several MOS transistors 171. The current sensing section 160, located between the first terminal section 120 and the second terminal section 130, can conveniently and accurately detect the current flowing from the negative terminal of the battery through the BMS to the load. Because the current flows out from the B- terminal 121, passes through the current sensing resistor 161, and then flows to the P- terminal 131, this arrangement allows the current sensing resistor 161 to directly and accurately measure the actual load current, providing reliable data for the BMS to accurately monitor the battery discharge status. The MOS transistor section 170, located between the third terminal section 140 and the fourth terminal section 150, facilitates efficient control of the battery charging and discharging process. During charging, MOSFET 171 can precisely control the current flowing into P+ terminal 151, ensuring that it flows safely and stably to B+ terminal 141 to charge the battery; during discharging, it can also effectively control the current output by the battery through B+ terminal 141, ensuring that the battery output meets the equipment requirements and protecting the battery and other equipment from damage such as overcurrent and overvoltage.

[0034] like Figure 2 As shown, in one embodiment, the BMS board 100 is connected to a heat dissipation aluminum busbar 180. The heat dissipation aluminum busbar 180 is connected to the current sensing section 160, the control section 110, and the MOSFET section 170 respectively through an insulating and thermally conductive silicone layer. The heat dissipation aluminum busbar 180 has good thermal conductivity, which can quickly conduct the heat generated by the current sensing section 160, the control section 110, and the MOSFET section 170 away, increasing the heat dissipation area, accelerating the heat dissipation speed, effectively reducing the operating temperature of each component, improving the heat dissipation efficiency of the BMS board 100, and ensuring its stable operation within the normal temperature range. The silicone layer has a certain degree of elasticity, which can play a buffering and shock-absorbing role between the BMS board 100 and the heat dissipation aluminum busbar 180, reducing the impact of vibration or impact on the components on the BMS board 100, reducing the risk of component damage, and improving the stability and durability of the system. The BMS board 100 and the heat dissipation aluminum busbar 180 are locked together. The heat dissipation aluminum busbar 180 has high strength and can support the BMS board 100, prevent the BMS board 100 from being deformed by external forces, enhance the rigidity of the entire BMS module, and thus protect the devices.

[0035] In one embodiment, the heat dissipation aluminum radiators 180 include two radiators respectively disposed on both sides of the BMS board 100; a connecting post 181 is provided between the heat dissipation aluminum radiators 180 and the BMS board 100; the two heat dissipation aluminum radiators 180 are fixed to the BMS board 100 by screws 190 cooperating with the connecting post 181; the BMS board 100 is provided with through holes 101 for the screws 190 to pass through. The two heat dissipation aluminum radiators 180 can dissipate heat from both sides of the BMS board 100 simultaneously, increasing the heat dissipation area and improving heat dissipation efficiency.

[0036] like Figure 3 As shown, in one embodiment, an output copper busbar 200 is connected to the terminal section. The output copper busbar 200 can withstand a large current load, meeting the BMS's requirements for different current outputs. Whether during battery charging or discharging, it ensures stable high-current transmission, guaranteeing smooth power transmission between the BMS and external devices, and adapting to the operational needs of high-power equipment.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A BMS board layout structure, characterized in that: The system includes a BMS board (100); the BMS board (100) includes a control unit (110) located in the middle and terminal units located at both ends; the terminal units include a first terminal unit (120), a second terminal unit (130), a third terminal unit (140), and a fourth terminal unit (150); the first terminal unit (120) and the second terminal unit (130) are located on one side of the control unit (110), and the third terminal unit (140) and the fourth terminal unit (150) are located on the other side of the control unit (110); the first terminal unit (120) and the third terminal unit (140) are arranged opposite to each other; the second terminal unit (130) and the fourth terminal unit (150) are arranged opposite to each other; a current detection unit (160) and a MOS transistor unit (170) are also provided on both sides of the control unit (110).

2. The BMS board layout structure according to claim 1, characterized in that: The first terminal portion (120) and the second terminal portion (130) are respectively disposed near the two opposite sides of the BMS board (100); the third terminal portion (140) and the fourth terminal portion (150) are respectively disposed near the two opposite sides of the BMS board (100).

3. The BMS board layout structure according to claim 1, characterized in that: The BMS board (100) is rectangular; the first terminal portion (120), the second terminal portion (130), the third terminal portion (140), and the fourth terminal portion (150) are evenly distributed at the four corners of the BMS board (100).

4. The BMS board layout structure according to claim 1, characterized in that: The first terminal section (120) includes a plurality of B- terminals (121); the second terminal section (130) includes a plurality of P- terminals (131); the third terminal section (140) includes a plurality of B+ terminals (141); and the fourth terminal section (150) includes a plurality of P+ terminals (151).

5. A BMS board layout structure according to claim 4, characterized in that: The first terminal section (120) includes three B- terminals (121); the second terminal section (130) includes three P- terminals (131); the third terminal section (140) includes three B+ terminals (141); and the fourth terminal section (150) includes three P+ terminals (151).

6. The BMS board layout structure according to claim 1, characterized in that: The current sensing section (160) is located between the first terminal section (120) and the second terminal section (130); the MOS transistor section (170) is located between the third terminal section (140) and the fourth terminal section (150); the current sensing section (160) includes several current sensing resistors (161); the MOS transistor section (170) includes several MOS transistors (171).

7. A BMS board layout structure according to claim 1, characterized in that: The BMS board (100) is connected to a heat dissipation aluminum busbar (180); the heat dissipation aluminum busbar (180) is connected to the current detection unit (160), the control unit (110), and the MOS transistor unit (170) respectively through an insulating and thermally conductive silicone layer.

8. A BMS board layout structure according to claim 7, characterized in that: The heat dissipation aluminum slab (180) includes two slabs respectively disposed on both sides of the BMS plate (100); a connecting post (181) is provided between the heat dissipation aluminum slab (180) and the BMS plate (100); the two heat dissipation aluminum slabs (180) are fixed to the BMS plate (100) by screws (190) cooperating with the connecting post (181); the BMS plate (100) is provided with through holes (101) for the screws (190) to pass through.

9. A BMS board layout structure according to claim 1, characterized in that: An output copper busbar (200) is connected to the terminal section.

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