Convergence plate heat-resistant structure based on battery management system

Abstract

The utility model relates to a bus board heat-resisting structure based on a battery management system, which comprises a heat-insulating box capable of accommodating a bus board, a moving component and a heat-dissipating component, and further comprises a temperature sensor and a controller which are electrically connected with the battery management system, and the heat-dissipating component is at least used for sucking air inside the heat-insulating box to the outside of the heat-insulating box. A top plate is fixedly mounted at the top of the heat insulation box, heat insulation blocks are arranged at the bottoms of the heat dissipation strip openings, and the moving assembly is at least used for synchronously driving the multiple heat insulation blocks to move in the length direction of the top plate; when the heat insulation block is moved, the heat dissipation strip opening has one of the three states that the heat dissipation strip opening is completely shielded by the heat insulation block, partially shielded by the heat insulation block and not shielded by the heat insulation block. According to the utility model, the heat of the confluence plate can be prevented from influencing the adjacent battery assembly or battery management system; and when the bus board is combusted, the battery assembly or the battery management system can be prevented from being combusted through effective isolation of the heat insulation box and the heat insulation block.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heat-resistant structure of a busbar based on a battery management system. Background Art

[0002] The battery management system (BMS), commonly known as the battery nanny or battery butler, is mainly used to intelligently manage and maintain each battery unit, monitor the battery status, prevent the battery from overcharging and over-discharging, and extend the battery life.

[0003] The busbar is mainly responsible for collecting the current of the battery modules in the battery pack. Under high current density and long-term operation, the busbar may generate more heat. The existing busbar installed in the battery pack does not have a good heat-resistant structure to block the heat generated by the busbar. The heat can easily spread to the adjacent battery components and battery management system and cause impact. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a heat-resistant structure of a busbar based on a battery management system. The specific technical solution is as follows:

[0005] A busbar heat-resistant structure based on a battery management system includes an insulation box that can accommodate the busbar, a movable component and a heat dissipation component, and also includes a temperature sensor and a controller electrically connected to the battery management system. The heat dissipation component is at least used to draw the air inside the insulation box to the outside of the insulation box. A top plate is fixedly installed on the top of the insulation box, and a plurality of heat dissipation strips that penetrate the interior of the insulation box are opened on the top plate. An insulation block is arranged at the bottom of the heat dissipation strip. The movable component is at least used to synchronously drive multiple insulation blocks to move in the length direction of the top plate; when the insulation block is moved, the heat dissipation strip has one of three states: being completely blocked by the insulation block, being partially blocked by the insulation block, and being not blocked by the insulation block.

[0006] As an improvement of the above technical solution: the heat dissipation assembly includes a heat dissipation fan fixedly installed on one side of the inner wall of the insulation box, the air outlet end of the heat dissipation fan is fixedly connected with an air outlet pipe, the side of the insulation box away from the heat dissipation fan is fixedly connected with an air inlet pipe, and the heat dissipation fan is electrically connected to the controller.

[0007] As an improvement of the above technical solution: the moving component includes a driving motor fixedly installed on one side of the bottom of the top plate, the output end of the driving motor is fixedly connected to a threaded rod, one end of the threaded rod away from the driving motor is rotatably connected to the other side of the bottom of the top plate, a moving block is threadedly connected to the threaded rod, and the bottom of the top plate is also fixedly connected to a limit bar arranged parallel to the threaded rod, one end of the multiple insulation blocks is fixedly connected to one side of the moving block, the other end of the multiple insulation blocks is slidably connected to the limit bar, and the driving motor is electrically connected to the controller.

[0008] As an improvement of the above technical solution: a silicone heat-conducting layer for placing a busbar is fixedly installed on the bottom end of the inner wall of the heat-insulating box.

[0009] As an improvement of the above technical solution: the top end surface of the heat insulation block is in contact with the bottom end surface of the top plate, and the cross-sectional area of ​​the heat insulation block is larger than the cross-sectional area of ​​the heat dissipation strip opening.

[0010] As an improvement of the above technical solution: the insulation box includes an inner layer, a first flame retardant layer and a first thermal insulation layer connected from the inside to the outside in sequence, the top plate and material are the same as the insulation box, the insulation block includes a second flame retardant layer, and the outside of the second flame retardant layer is fixedly connected to a second thermal insulation layer.

[0011] Beneficial effects of the utility model:

[0012] 1. When the normal temperature threshold is detected, the battery management system will transmit a signal to the controller, and the controller will then control the moving component to drive the heat insulation block to move so that the heat dissipation strip port is not blocked by the heat insulation block. At this time, there is no need to start the heat dissipation component, so that the busbar can dissipate heat spontaneously through the heat dissipation strip port, effectively saving power;

[0013] 2. When the medium temperature threshold is detected, the battery management system will transmit a signal to the controller, and the controller will then control the moving component to drive the heat insulation block to move, so that the heat dissipation strip opening is partially blocked by the heat insulation block. At this time, the fan is rotated at medium speed to effectively dissipate heat from the manifold;

[0014] 3. When a high temperature threshold is detected, the battery management system will transmit a signal to the controller, and the controller will then control the moving component to drive the insulation block to move so that the heat dissipation strip opening is completely blocked by the insulation block. At this time, the fan will rotate at high speed, and the busbar will isolate the other battery components of the battery pack to prevent the heat of the busbar from affecting the adjacent battery components or battery management system; and when the busbar burns, the insulation box and the insulation block can also effectively isolate the battery components or battery management system from burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the heat insulation box in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the top plate in the utility model;

[0018] Figure 4 It is a cross-sectional schematic diagram of the heat insulation box in the utility model;

[0019] Figure 5 It is a schematic cross-sectional structure diagram of the heat insulation block in the utility model.

[0020] Figure numerals: 1. insulation box; 101. first insulation layer; 102. first flame retardant layer; 103. inner layer; 11. air inlet pipe; 12. air outlet pipe; 2. top plate; 13. silicone thermal conductive layer; 14. temperature sensor; 15. cooling fan; 20. heat dissipation strip opening; 3. insulation block; 300. second insulation layer; 301. second flame retardant layer; 31. drive motor; 32. threaded rod; 33. moving block; 34. limit strip; 4. busbar. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] Example

[0023] Please refer to Figure 1-Figure 5 , a busbar heat-resistance structure based on a battery management system, comprising a heat-insulating box 1 for accommodating a busbar, a moving component and a heat-dissipating component, and also comprising a temperature sensor 14 and a controller electrically connected to the battery management system, the heat-dissipating component being at least used to draw air from the inside of the heat-insulating box 1 to the outside of the heat-insulating box 1, a top plate 2 being fixedly mounted on the top of the heat-insulating box 1, a plurality of heat-dissipating strip openings 20 penetrating the inside of the heat-insulating box 1 being provided on the top plate 2, a heat-insulating block 3 being provided at the bottom of the heat-dissipating strip openings 20, and the moving component being at least used to synchronously drive a plurality of heat-insulating blocks 3 to move in the length direction of the top plate 2; when the heat-insulating block 3 is moved, the heat-dissipating strip openings 20 have one of three states: being completely blocked by the heat-insulating block 3, being partially blocked by the heat-insulating block 3, and being not blocked by the heat-insulating block 3;

[0024] The temperature sensor 14 is installed on one side of the insulation box 1 close to the busbar 4, or is installed on the busbar 4. The temperature sensor 14 is used to directly or indirectly monitor the temperature state of the busbar 4 inside the insulation box 1. The controller can be installed in a suitable position in the battery pack. The heat dissipation component and the moving component are both connected to the controller, and the controller is used to facilitate their control.

[0025] In an optional embodiment: the heat dissipation component includes a cooling fan 15 fixedly mounted on one side of the inner wall of the insulation box 1, and the air outlet end of the cooling fan 15 is fixedly connected to the air outlet pipe 12. Specifically, the air exhaust end of the cooling fan 15 is located inside the insulation box 1, and one end of the air outlet pipe 12 penetrates the insulation box 1 and extends to the outside of the battery pack. The side of the insulation box 1 away from the cooling fan 15 is fixedly connected to the air inlet pipe 11. Specifically, one end of the air inlet pipe 11 is located on the inner side of the insulation box 1, and the other end penetrates to the outside of the insulation box 1 and extends to the outside of the battery pack. Filter panels are installed at the ports of the air inlet pipe 11 and the air outlet pipe 12 to prevent impurities such as battery pack dust from entering the interior of the insulation box 1, and the cooling fan 15 is electrically connected to the controller.

[0026] In an optional embodiment: the moving assembly includes a driving motor 31 fixedly mounted on one side of the bottom of the top plate 2, the output end of the driving motor 31 is fixedly connected to a threaded rod 32, and one end of the threaded rod 32 away from the driving motor 31 is rotatably connected to the other side of the bottom of the top plate 2;

[0027] Specifically, the threaded rod 32 is arranged along the length direction of the top plate 2, and the moving block 33 is threadedly connected to the threaded rod 32. The bottom of the top plate 2 is also fixedly connected to a limit bar 34 arranged parallel to the threaded rod 32. One end of the plurality of heat insulation blocks 3 is fixedly connected to one side of the moving block 33, and the other end of the plurality of heat insulation blocks 3 is slidably connected to the limit bar 34. The heat insulation block 3 can be limited by the limit bar 34, so that the moving block 33 can drive the heat insulation block 3 to move stably, and the driving motor 31 is electrically connected to the controller;

[0028] Specifically, the temperature value inside the heat insulation box 1 is monitored by the temperature sensor 14, and the temperature threshold of the busbar 4 inside the heat insulation box 1 monitored by the temperature sensor 14 is set through the controller and the battery management system, which are set to the normal temperature threshold, the medium temperature threshold and the high temperature threshold respectively. The temperature value monitored by the temperature sensor 14 is transmitted to the battery management system, so that the battery management system detects the working condition of the reporting board, which is convenient for the coordinated management of other battery components. The specific temperature range value is set according to the temperature value of the busbar when it is in the working state. When the normal temperature threshold is detected, the battery management system will transmit a signal to the controller, and the controller will control the moving component to drive the heat insulation block 3 to move, so that the heat dissipation strip 20 is in a state not blocked by the heat insulation block 3. At this time, there is no need to start the heat dissipation component, so that the busbar can dissipate heat spontaneously through the heat dissipation strip 20, effectively saving electricity;

[0029] When the medium temperature threshold is detected, the battery management system transmits a signal to the controller, and the controller controls the moving component to drive the heat insulation block 3 to move, so that the heat dissipation strip opening 20 is partially blocked by the heat insulation block 3. At this time, the fan is rotated at a medium speed to effectively dissipate the heat of the busbar, so that the busbar can dissipate heat spontaneously through the heat dissipation strip opening 20;

[0030] When a high temperature threshold is detected, the battery management system will transmit a signal to the controller, and the controller will then control the moving component to drive the insulation block 3 to move, so that the heat dissipation strip 20 is in a state of being completely blocked by the insulation block 3. At this time, the fan is allowed to rotate at high speed, and the busbar is isolated from other battery components of the battery pack to prevent the heat of the busbar from affecting its adjacent battery components or battery management system; and when the busbar burns, the effective isolation of the insulation box 1 and the insulation block 3 can also prevent the battery components or the battery management system from burning.

[0031] In an optional embodiment: a silicone thermal conductive layer 13 for placing a busbar is fixedly installed on the bottom end of the inner wall of the insulation box 1, and the busbar is installed inside the insulation box 1, and the bottom end surface of the busbar is in contact with the top end surface of the silicone thermal conductive layer 13, so that the heat on the busbar 4 is transferred to the silicone thermal conductive layer 13, and then the heat dissipation of the busbar 4 is facilitated.

[0032] In an optional embodiment: the top end surface of the insulation block 3 contacts the bottom end surface of the top plate 2, and the cross-sectional area of ​​the insulation block 3 is larger than the cross-sectional area of ​​the heat dissipation strip opening 20, so that the insulation block 3 can shield the heat dissipation strip opening 20.

[0033] In an optional embodiment: the insulation box 1 includes an inner layer 103, a first flame retardant layer 102 and a first thermal insulation layer 101 which are connected in sequence from the inside to the outside, the top plate 2 and the material are the same as those of the insulation box 1, the insulation block 3 includes a second flame retardant layer 301, and the outer side of the second flame retardant layer 301 is fixedly connected with a second thermal insulation layer 300, so that the insulation box 1, the top plate 2 and the insulation block 3 all have flame retardant and thermal insulation effects. Furthermore, the inner layer 103 can be made of aluminum, which can facilitate the heat dissipation of the busbar 4 inside the insulation box 1.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat-resistant structure of a busbar based on a battery management system, characterized in that: The invention comprises a heat insulation box (1), a moving component and a heat dissipation component, and also comprises a temperature sensor (14) and a controller electrically connected to a battery management system, wherein the heat dissipation component is at least used for drawing air inside the heat insulation box (1) to the outside of the heat insulation box (1), a top plate (2) is fixedly mounted on the top of the heat insulation box (1), a plurality of heat dissipation strip openings (20) which are connected to the inside of the heat insulation box (1) are provided on the top plate (2), a heat insulation block (3) is provided at the bottom of the heat dissipation strip openings (20), and the moving component is at least used for synchronously driving a plurality of heat insulation blocks (3) to move in the length direction of the top plate (2); when the heat insulation block (3) is moved, the heat dissipation strip openings (20) have one of three states: being completely blocked by the heat insulation block (3), being partially blocked by the heat insulation block (3), and being not blocked by the heat insulation block (3).

2. The heat-insulating structure of the busbar based on the battery management system according to claim 1, characterized in that: The heat dissipation assembly comprises a heat dissipation fan (15) fixedly mounted on one side of the inner wall of the heat insulation box (1); an air outlet end of the heat dissipation fan (15) is fixedly connected to an air outlet pipe (12); a side of the heat insulation box (1) away from the heat dissipation fan (15) is fixedly connected to an air inlet pipe (11); and the heat dissipation fan (15) is electrically connected to a controller.

3. The heat-insulating structure of the busbar based on the battery management system according to claim 2 is characterized in that: The moving assembly comprises a driving motor (31) fixedly mounted on one side of the bottom of the top plate (2); the output end of the driving motor (31) is fixedly connected to a threaded rod (32); one end of the threaded rod (32) away from the driving motor (31) is rotatably connected to the other side of the bottom of the top plate (2); a moving block (33) is threadedly connected to the threaded rod (32); the bottom of the top plate (2) is also fixedly connected to a limit bar (34) arranged parallel to the threaded rod (32); one end of a plurality of the heat insulation blocks (3) is fixedly connected to one side of the moving block (33); the other ends of the plurality of the heat insulation blocks (3) are slidably connected to the limit bar (34); and the driving motor (31) is electrically connected to a controller.

4. The heat-insulating structure of the busbar based on the battery management system according to claim 3 is characterized in that: A silica gel heat-conducting layer (13) for placing a busbar is fixedly mounted on the bottom end of the inner wall of the heat-insulating box (1).

5. The heat-insulating structure of the busbar based on the battery management system according to claim 1, characterized in that: The top end surface of the heat insulation block (3) contacts the bottom end surface of the top plate (2), and the cross-sectional area of ​​the heat insulation block (3) is greater than the cross-sectional area of ​​the heat dissipation strip opening (20).

6. The heat-insulating structure of the busbar based on the battery management system according to any one of claims 1 to 5, characterized in that: The heat-insulating box (1) comprises an inner layer (103), a first flame-retardant layer (102) and a first heat-insulating layer (101) which are connected in sequence from the inside to the outside; the top plate (2) is made of the same material as the heat-insulating box (1); the heat-insulating block (3) comprises a second flame-retardant layer (301); and a second heat-insulating layer (300) is fixedly connected to the outside of the second flame-retardant layer (301).

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