A BMS control board structure
By setting a baffle structure between the BMS control board and the battery cell, including an intermediate layer and a heat-insulating layer, the problems of heat radiation and bulging compression of the battery cell in the BMS board are solved, thereby improving the stability and safety of the BMS board and making it suitable for battery management systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU HUIQIANG TECHNOLOGY CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-07
AI Technical Summary
Existing BMS boards are prone to localized high temperatures due to heat radiation from their proximity to the battery cells, and are also susceptible to bulging and compression from the battery cells, affecting their lifespan and safety.
A baffle, including an intermediate layer and a piezoresistive coating, is installed between the BMS control board and the battery cell to block the heat of the battery cell and to detect and prevent further compression when the battery cell bulges. The baffle also includes a heat-insulating layer to enhance heat insulation and is easy to disassemble and maintain via a screw sleeve.
It effectively reduces the temperature rise of the BMS board, improves stability and safety, prevents cell bulging from damaging the BMS board, and ensures the safety and miniaturization of the battery pack.
Smart Images
Figure CN224473480U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of control boards, in particular to a BMS control board structure. Background Art
[0002] As a key part of the battery management system, the BMS board is generally installed on one side of the battery cell bracket. As shown in the patent with the application number CN201620869205.8, the BMS board is fixedly installed on one side of the battery cell bracket by screws. At this time, the BMS board is close to the battery cell to save space inside the battery pack. This installation method is the conventional installation method of the BMS board. Although it can save space inside the battery pack, because it is close to the battery cell, the heat on the battery cell is easily directly radiated to the BMS board, causing local high temperature of the BMS board, which in turn affects the life of the BMS board. Moreover, when the battery cell bulges, it is easy to directly squeeze the BMS board, causing the BMS to rupture. Content of the Utility Model
[0003] In order to solve the shortcomings that the existing BMS board is prone to local high temperature and being squeezed by the bulging battery cell, the utility model provides a BMS control board structure to reduce heat absorption and avoid being squeezed by the bulging battery cell.
[0004] To achieve the above object, the utility model adopts the following technical solutions:
[0005] A BMS control board structure is used to manage the battery cells installed in the battery cell bracket. The control board structure includes a control board main body and a baffle. The baffle includes an intermediate layer and a piezoresistive coating. The intermediate layer is detachably connected to one side of the battery cell bracket. The piezoresistive coating is arranged on the side of the intermediate layer close to the battery cell. The distance from the piezoresistive coating to the battery cell is d1, where 2mm < d1 < 4mm. The control board main body is detachably connected to the side of the intermediate layer facing away from the battery cell. The control board main body is electrically connected to the battery cell. A resistance measurement component is arranged on the control board main body. Both ends of the piezoresistive coating are electrically connected to the resistance measurement component respectively.
[0006] Through the above settings, a baffle is arranged between the control board main body and the battery cell to block the heat of the battery cell, reduce the heat absorption and temperature rise of the control board main body, and thus improve the stability and safety of the control board structure. In addition, the baffle can block the bulging of the battery cell from crushing the control board main body. When the battery cell bulges and contacts the baffle, it can be detected in time to avoid the further bulging of the battery cell causing a leakage safety accident.
[0007] Furthermore, the baffle further includes a heat insulation layer arranged on the side of the intermediate layer facing the control board main body. The projection of the control board main body towards the battery cell is within the heat insulation layer.
[0008] Through the above settings, the heat insulation performance of the baffle is further improved.
[0009] Furthermore, the heat insulation layer is made of mica material.
[0010] Furthermore, screw sleeves extending towards the main body of the control board are provided at both the upper and lower ends of the intermediate layer. First connection holes are provided at both the upper and lower ends of the main body of the control board. A first screw passes through the first connection hole and is screwed into the screw sleeve to lock the main body of the control board onto the screw sleeve. There is a gap between the main body of the control board and the heat insulation layer.
[0011] With the above arrangement, it is convenient to disassemble the main body of the control board from the baffle for maintenance and replacement. The screw sleeve supports the main body of the control board, separating the main body of the control board from the heat insulation layer, further reducing the heat absorption of the main body of the control board.
[0012] Furthermore, the distance from the main body of the control board to the heat insulation layer is d2, where 1 mm < d2 < 2 mm.
[0013] With the above arrangement, the distance between the main body of the control board and the heat insulation layer is reasonably controlled, which is beneficial to the miniaturization of the battery pack.
[0014] Furthermore, second connection holes are provided at both the upper and lower ends of the intermediate layer. Screw holes are provided on the side of the cell bracket. A second screw passes through the second connection hole and is screwed into the screw hole to lock the intermediate layer onto the side of the cell bracket.
[0015] With the above arrangement, the intermediate layer is locked onto the side of the cell bracket by the second screw.
[0016] Furthermore, the piezoresistive coating is a carbon nanotube coating. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the control board structure of the embodiment.
[0018] Figure 2 It is Figure 1 an enlarged view of part A of DETAILED DESCRIPTION OF THE EMBODIMENT
[0019] The technical solution of the present invention will be further specifically described below through embodiments in combination with the drawings.
[0020] As Figures 1 to 2 , a BMS control board structure is used to manage the cells 4 installed in the cell bracket 3. The control board structure includes a control board main body 5 and a baffle 6. The baffle 6 includes an intermediate layer 61 and a piezoresistive coating 62. The intermediate layer 61 is detachably connected to one side of the cell bracket 3. The piezoresistive coating 62 is provided on the side of the intermediate layer 61 close to the cells 4. The distance from the piezoresistive coating 62 to the cells 4 is d1, where 2 mm < d1 < 4 mm. The control board main body 5 is detachably connected to the side of the intermediate layer 61 facing away from the cells 4. The control board main body 5 is electrically connected to the cells 4. A resistance measurement component 7 is provided on the control board main body 5. Both ends of the piezoresistive coating 62 are electrically connected to the resistance measurement component 7.
[0021] With the above settings, a baffle 6 is set between the control board body 5 and the battery cell 4 to block the heat of the battery cell 4, reduce the heating and temperature rise of the control board body 5, and thus improve the structural stability and safety of the control board. In addition, the baffle 6 can prevent the battery cell 4 from bulging and damaging the control board body 5. When the battery cell 4 bulges and comes into contact with the baffle 6, it can be detected in time to avoid the battery cell 4 from bulging further and causing leakage safety accidents.
[0022] The control board structure of this application is inherited from the battery pack. After being connected to the battery cell 4 in the battery pack, it can be used for power management of the battery cell 4, improving the safety and lifespan of the battery cell 4. The battery cell 4 serves as an energy storage element, such as... Figure 1 Cell supports 3 are installed on the upper and lower sides of cell 4 to support cell 4 and improve the stability of cell 4 in the battery pack. A baffle 6 is vertically installed on the left side of the cell support 3, and a control board body 5 is installed parallel to the left side of the baffle 6. The control board body 5 can refer to existing BMS control boards. Cell 4 discharges to the outside through the control board body 5, or the outside world charges cell 4 through the control board body 5. The control board body 5 manages the current to improve the safety and stability of cell 4. Cell 4 heats up during charging and discharging; the baffle 6 can block the heat radiation from cell 4 to reduce the heat on the control board body 5. The baffle 6 has a heat insulation function. Initially, the piezoresistive coating 62 and... There is a gap between the battery cells 4, that is, the piezoresistive coating 62 does not contact the battery cells 4. The two ends of the piezoresistive coating 62 are connected to the resistance measuring component 7 on the control board body 5 through flexible wires. The control board body 5 detects the resistance of the piezoresistive coating 62 in real time through the resistance measuring component 7. When the battery cell 4 bulges on the side close to the control board body 5 and comes into contact with the piezoresistive coating 62, the resistance of the piezoresistive coating 62 changes. The control board body 5 sends an early warning to the terminal through a speaker or through a wireless module, and at the same time stops the charging and discharging of the battery cell 4 to prevent the battery cell 4 from bulging further. At this time, the baffle 6 blocks the bulging battery cell 4 to prevent the battery cell 4 from bulging further and damaging the control board body 5.
[0023] As one implementation, the baffle 6 also includes a heat-insulating layer 63 disposed on the side of the intermediate layer 61 facing the control board body 5, and the projection of the control board body 5 onto the battery cell 4 is located within the heat-insulating layer 63.
[0024] The above settings further enhance the heat insulation of baffle 6.
[0025] Both the control board body 5 and the heat-insulating layer 63 in this application are rectangular. The length and width of the heat-insulating layer 63 are greater than the length and width of the control board body 5. When the battery cell 4 radiates heat energy to the left, it is blocked by the heat-insulating layer 63 to prevent the control board body 5 from being directly heated.
[0026] As one implementation method, the heat-insulating layer 63 is made of mica.
[0027] As one implementation, the upper and lower ends of the intermediate layer 61 are provided with threaded sleeves 8 extending toward the control board body 5. The upper and lower ends of the control board body 5 are provided with first connecting holes 9. The first screw 13 passes through the first connecting hole 9 and is screwed into the threaded sleeve 8 to lock the control board body 5 onto the threaded sleeve 8. There is a gap between the control board body 5 and the heat-insulating layer 63.
[0028] The above configuration facilitates the removal of the control board body 5 from the baffle 6 for maintenance and replacement. The screw sleeve 8 supports the control board body 5 and separates the control board body 5 from the heat insulation layer 63, further reducing the heat on the control board body 5.
[0029] As one implementation method, the distance from the control board body 5 to the heat insulation layer 63 is d2, 1mm. <d2<2mm。
[0030] By setting the above parameters, the distance between the main body of the control board 5 and the heat insulation layer 63 can be reasonably controlled, which is beneficial to the miniaturization of the battery pack.
[0031] As one implementation, the middle layer 61 is provided with second connecting holes 10 at both the top and bottom ends, and the battery cell bracket 3 is provided with screw holes 11 on the side. The second screw 12 passes through the second connecting holes 10 and is screwed into the screw holes 11 to lock the middle layer 61 to the side of the battery cell bracket 3.
[0032] With the above setup, the intermediate layer 61 is locked to the side of the cell support 3 by the second screw 12.
[0033] As one implementation method, the piezoresistive coating 62 is a carbon nanotube coating.
[0034] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A BMS control board structure for managing battery cells installed in a battery cell support, characterized in that, The control board structure includes a control board main body and a baffle. The baffle includes an intermediate layer and a piezoresistive coating. The intermediate layer is detachably connected to one side of the battery cell bracket. The piezoresistive coating is provided on the side of the intermediate layer close to the battery cell. The distance from the piezoresistive coating to the battery cell is d1, where 2 mm < d1 < 4 mm. The control board main body is detachably connected to the side of the intermediate layer facing away from the battery cell. The control board main body is electrically connected to the battery cell. A resistance measuring component is provided on the control board main body. Both ends of the piezoresistive coating are electrically connected to the resistance measuring component respectively.
2. The BMS control board structure according to claim 1, characterized in that, The baffle further includes a heat insulation layer provided on the side of the intermediate layer facing the control board main body. The projection of the control board main body onto the battery cell is within the heat insulation layer.
3. The BMS control board structure according to claim 2, characterized in that, The heat insulation layer is made of mica material.
4. The BMS control board structure according to claim 2, characterized in that, Screw sleeves extending towards the control board main body are provided at the upper and lower ends of the intermediate layer. First connection holes are provided at the upper and lower ends of the control board main body. A first screw passes through the first connection hole and is tightened in the screw sleeve to lock the control board main body onto the screw sleeve. There is a gap between the control board main body and the heat insulation layer.
5. The BMS control board structure according to claim 4, characterized in that, The distance from the control board main body to the heat insulation layer is d2, where 1 mm < d2 < 2 mm.
6. The BMS control board structure according to claim 1, characterized in that, Second connection holes are provided at the upper and lower ends of the intermediate layer. Screw holes are provided on the side surface of the battery cell bracket. A second screw passes through the second connection hole and is tightened in the screw hole to lock the intermediate layer onto the side surface of the battery cell bracket.
7. The BMS control board structure according to claim 1, characterized in that, The piezoresistive coating is a carbon nanotube coating.