Battery management system-based heat-resistant busbar assembly

Abstract

A battery management system-based heat-resistant busbar assembly, characterized in that it comprises a thermal insulation box (1), a movable assembly, and a heat dissipation assembly, as well as a temperature sensor (14) and a control unit, which are electrically connected to the battery management system, wherein the heat dissipation assembly serves at least to draw the air inside the thermal insulation box (1) to the outside of the thermal insulation box (1); wherein an upper plate (2) is fixedly attached to a top surface of the thermal insulation box (1), on which several heat dissipation strip openings (20) are provided that communicate with the interior of the thermal insulation box (1); wherein a thermal insulation block (3) is provided at the bottom of the heat dissipation strip openings (20), wherein the movable assembly serves at least to drive several thermal insulation blocks (3) synchronously to move in the longitudinal direction of the upper plate (2);wherein when the heat insulation blocks (3) are moved the heat dissipation strip openings (20) have one of three states, namely to be completely blocked by the heat insulation block (3), to be partially blocked by the heat insulation block (3) or not blocked by the heat insulation block (3).

Description

Technical area

[0001] The utility model relates to the field of battery technology and in particular to a battery management system-based heat-resistant busbar plate assembly. State of the art

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

[0003] The busbar plate is primarily responsible for collecting the current from the battery module in the battery pack. Under high current density and long-term operation, the busbar plate can generate significant heat. The existing busbar plate installed in the battery pack lacks a good heat-resistant structure to block the large amount of heat generated by the busbar plates, and this heat can easily spread to adjacent battery components and the battery management system, causing significant impacts. Summary

[0004] In light of the deficiencies of the prior art, the present utility model provides a battery management system-based heat-resistant busbar plate assembly. The specific technical solutions are as follows:

[0005] A battery management system-based heat-resistant busbar plate assembly includes a thermal insulation box that can accommodate a busbar plate, a movable assembly, and a heat dissipation assembly, as well as a temperature sensor and a control unit electrically connected to the battery management system. The heat dissipation assembly serves at least to exhaust the air inside the thermal insulation box to the outside of the thermal insulation box. A top plate is fixedly attached to the top of the thermal insulation box, on which a plurality of heat dissipation strip openings are provided, which communicate with the interior of the thermal insulation box; heat insulation blocks are provided at the bottom of the heat dissipation strip openings. The movable assembly serves at least to drive a plurality of heat insulation blocks synchronously to move in the longitudinal direction of the top plate.When moving the heat insulating blocks, the heat dissipation strip openings have one of three states, namely being completely blocked by the heat insulating block, partially blocked by the heat insulating block, or not blocked by the heat insulating block.

[0006] As a further development of the above-mentioned technical solution, the heat dissipation assembly includes a heat dissipation fan fixedly installed on one side of an inner wall of the heat insulation box, an air outlet end of the heat dissipation fan is fixedly connected to an air outlet pipe, a side of the heat insulation box remote from the heat dissipation fan is fixedly connected to an air inlet pipe, and the heat dissipation fan is electrically connected to the control unit.

[0007] As a further development of the above-mentioned technical solution, the movable assembly includes a drive motor fixedly installed on one side of the underside of the upper plate, wherein an output end of the drive motor is fixedly connected to a threaded rod, and an end of the threaded rod remote from the drive motor is rotatably connected to the other side of the underside of the upper plate. A movable block is bolted to the threaded rod, and the underside of the upper plate is further fixedly connected to a limit bar arranged parallel to the threaded rod. One end of the plurality of thermal insulation blocks is fixedly connected to one side of the movable block, and the other end of the plurality of thermal insulation blocks is slidably connected to the limit bar. The drive motor is electrically connected to the control unit.

[0008] As a further development of the above-mentioned technical solution, a heat-conducting silicone layer is permanently installed at a lower end of the inner wall of the thermal insulation box for the placement of the busbar plate.

[0009] As a further development of the above technical solution, an upper end surface of the heat insulating block is in contact with a lower end surface of the upper plate, and the cross-sectional area of ​​the heat insulating block is larger than the cross-sectional area of ​​the heat dissipation strip opening.

[0010] As a further development of the above-mentioned technical solution, the thermal insulation box consists of an inner layer, a first flame-retardant layer, and a first thermal insulation layer, which are sequentially bonded from the inside to the outside. The upper plate is made of the same material as the thermal insulation box. The thermal insulation block comprises a second flame-retardant layer. A second thermal insulation layer is firmly bonded to the outside of the second flame-retardant layer.

[0011] Advantageous effects of the present utility model: 1. When monitoring a normal temperature threshold, the battery management system sends a signal to the control unit, and the control unit then controls the movable assembly to drive the heat insulation block to move, so that the heat dissipation strip opening is in a state where it is not blocked by the heat insulation block; at this time, the heat dissipation assembly does not need to be activated, so that the busbar plate can spontaneously dissipate heat through the heat dissipation strip opening, effectively saving power. 2. When monitoring a medium temperature threshold, the battery management system sends a signal to the control unit, and the control unit then controls the movable assembly to drive the heat insulation block to move, so that the heat dissipation strip opening is in a state where it is partially blocked by the heat insulation block; at this time, the fan rotates at medium speed, which can effectively dissipate heat from the busbar plate. 3. When monitoring a high temperature threshold, the battery management system sends a signal to the control unit, and the control unit then controls the movable assembly to drive the heat insulation block to move, so that the heat dissipation strip opening is in a state where it is completely blocked by the heat insulation block; at this time, the fan rotates at high speed, and in the process, the bus bar plate is isolated from the other battery components of the battery pack to prevent the heat of the bus bar plate from affecting the adjacent battery components or the battery management system; and in the event of combustion of the bus bar plate, combustion of the battery components or the battery management system can also be prevented by the effective insulation of the heat insulation box and the heat insulation block. Brief description of the drawings Fig. 1 is a schematic representation of the overall structure of the present utility model; Fig. 2 is a schematic diagram of the internal structure of the heat insulation box of the present utility model; Fig. 3 is a schematic structural diagram of the upper plate of the present utility model; Fig. 4 is a schematic cross-sectional view of the heat insulation box of the present utility model; Fig. 5 is a schematic cross-sectional structural view of the heat insulating block of the present utility model. List of reference symbols

[0012] 1 heat insulation box; 101 first heat insulation layer; 102 first flame retardant layer; 103 inner layer; 11 air inlet pipe; 12 air outlet pipe; 2 upper plate; 13 heat-conducting silicone layer; 14 temperature sensor; 15 heat dissipation fan; 20 heat dissipation strip opening; 3 heat insulation block; 300 second heat insulation layer; 301 second flame retardant layer; 31 drive motor; 32 threaded rod; 33 movable block; 34 limit bar; 4 busbar plate. Examples of implementation

[0013] To clarify the problem, technical solutions, and advantages of the present utility model, the present utility model is described in more detail below with reference to the drawings and embodiments. It is understood that the specific embodiments described herein serve only to illustrate the present utility model and are not intended to limit the present utility model. Embodiments

[0014] It will be Fig. 1 to Fig.5. A battery management system-based heat-resistant busbar plate assembly includes a thermal insulation box 1 capable of accommodating a busbar plate, a movable assembly, and a heat dissipation assembly, as well as a temperature sensor 14 and a control unit electrically connected to the battery management system. The heat dissipation assembly serves at least to exhaust the air inside the thermal insulation box 1 to the outside of the thermal insulation box 1. Fixedly attached to the top of the thermal insulation box 1 is a top plate 2, on which a plurality of heat dissipation strip openings 20 are provided, communicating with the interior of the thermal insulation box 1; and at the bottom of the heat dissipation strip openings 20, heat insulation blocks 3 are provided. The movable assembly serves at least to drive a plurality of heat insulation blocks 3 synchronously to move in the longitudinal direction of the top plate 2.When moving the heat insulating blocks 3, the heat dissipation strip openings 20 have one of three states, namely being completely blocked by the heat insulating block 3, being partially blocked by the heat insulating block 3, or not being blocked by the heat insulating block 3.

[0015] The temperature sensor 14 can be installed on a side close to the busbar plate 4 inside the thermal insulation box 1 or on the busbar plate 4. The temperature sensor 14 is used to directly or indirectly monitor the temperature condition of the busbar plate 4 inside the thermal insulation box 1. The control unit can be installed at a suitable location in the battery pack. The heat dissipation assemblies and the movable assembly are both connected to the control unit and can be conveniently controlled via the control unit.

[0016] In an alternative embodiment, the heat dissipation assembly includes a heat dissipation fan 15 fixedly installed on one side of the inner wall of the thermal insulation box 1. An air outlet end of the heat dissipation fan 15 is fixedly connected to an air outlet pipe 12. Specifically, an air intake end of the heat dissipation fan 15 is located inside the thermal insulation box 1. One end of the air outlet pipe 12 passes through the thermal insulation box 1 and extends to the outside of the battery pack. A side of the thermal insulation box 1 remote from the heat dissipation fan 15 is fixedly connected to an air inlet pipe 11. Specifically, one end of the air inlet pipe 11 is located inside the thermal insulation box 1, and the other end extends to the outside of the thermal insulation box 1 and extends to the outside of the battery pack.Filter plates are attached to the openings of both the air inlet pipe 11 and the air outlet pipe 12 to prevent dust from the battery pack and other contaminants from entering the interior of the heat insulation box 1. The heat dissipation fan 15 is electrically connected to the control unit.

[0017] In an alternative embodiment, the movable assembly comprises a drive motor 31 fixedly installed on one side of the underside of the upper plate 2, wherein the output end of the drive motor 31 is fixedly connected to a threaded rod 32 and an end of the threaded rod 32 remote from the drive motor 31 is rotatably connected to the other side of the underside of the upper plate 2.

[0018] Specifically, the threaded rod 32 is arranged along the longitudinal direction of the upper plate 2, and the threaded rod 32 is screwed to a movable block 33. The bottom of the upper plate 2 is further fixedly connected to a limit bar 34 arranged parallel to the threaded rod 32. One end of the plurality of heat-insulating blocks 3 is fixedly connected to one side of the movable block 33, and the other end of the plurality of heat-insulating blocks 3 is slidably connected to the limit bar 34. The heat-insulating block 3 can be limited by the limit bar 34, so that the movable block 33 can drive the heat-insulating block 3 to move stably. The drive motor 31 is electrically connected to the controller.

[0019] Specifically, the temperature value inside the thermal insulation box 1 is monitored by the temperature sensor 14, and the temperature threshold of the busbar plate 4 inside the thermal insulation box 1, monitored by the temperature sensor 14, is set by the control unit and the battery management system, respectively, to a normal temperature threshold, a medium temperature threshold, and a high temperature threshold. The temperature value monitored by the temperature sensor 14 is transmitted to the battery management system, allowing the battery management system to recognize the operating state of the busbar plate to facilitate the cooperative management of other battery components. The specific temperature value range is set according to the temperature value of the busbar plate in its operating state.When monitoring a normal temperature threshold, the battery management system sends a signal to the control unit, and the control unit then controls the movable assembly to drive the heat insulating block 3 to move, so that the heat dissipation strip opening 20 is in a state where it is not blocked by the heat insulating block 3; at this time, the heat dissipation assembly does not need to be activated, so that the busbar plate can spontaneously dissipate heat through the heat dissipation strip opening 20, thereby effectively saving power.

[0020] When monitoring a medium temperature threshold, the battery management system sends a signal to the control unit, and the control unit then controls the movable assembly to drive the heat insulating block 3 to move, so that the heat dissipation strip opening 20 is in a state where it is partially blocked by the heat insulating block 3; at this time, the fan rotates at a medium speed, which can effectively dissipate heat from the busbar plate.

[0021] When monitoring a high temperature threshold, the battery management system sends a signal to the control unit, and the control unit then controls the movable assembly to drive the heat insulation block 3 to move so that the heat dissipation strip opening 20 is in a state where it is completely blocked by the heat insulation block 3; at this time, the fan rotates at high speed, and in the process, the bus bar plate is isolated from the other battery components of the battery pack to prevent the heat of the bus bar plate from affecting the adjacent battery components or the battery management system; and in the event of combustion of the bus bar plate, combustion of the battery components or the battery management system can also be prevented due to the effective insulation of the heat insulation box 1 and the heat insulation block 3.

[0022] In an alternative embodiment, a heat-conducting silicone layer 13 is permanently installed at a lower end of the inner wall of the thermal insulation box 1 for placing the busbar plate. The busbar plate is installed inside the thermal insulation box 1, and the lower end surface of the busbar plate is in contact with the upper end surface of the heat-conducting silicone layer 13, thereby easily transferring heat on the busbar plate 4 to the heat-conducting silicone layer 13, which then facilitates heat dissipation from the busbar plate 4.

[0023] In an alternative embodiment, an upper end surface of the heat insulating block 3 is in contact with a lower end surface of the upper plate 2, and the cross-sectional area of ​​the heat insulating block 3 is larger than the cross-sectional area of ​​the heat dissipation strip opening 20, so that the heat insulating block 3 can block the heat dissipation strip opening 20.

[0024] In an alternative embodiment, the thermal insulation box 1 consists of an inner layer 103, a first flame-retardant layer 102, and a first thermal insulation layer 101, which are sequentially bonded from the inside to the outside. The top plate 2 is made of the same material as the thermal insulation box 1. The thermal insulation block 3 comprises a second flame-retardant layer 301. A second thermal insulation layer 300 is firmly bonded to the outside of the second flame-retardant layer 301, so that the thermal insulation box 1, the top plate 2, and the thermal insulation block 3 all exhibit flame-retardant and thermal insulation effects. Furthermore, the inner layer 103 can be made of aluminum, which facilitates heat dissipation from the busbar plate 4 within the thermal insulation box 1.

[0025] The above-mentioned embodiments are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. All modifications, equivalent substitutions, and improvements made in accordance with the spirit and principles of the present utility model are intended to fall within the scope of protection of the present utility model.

Claims

[1] Battery management system-based heat-resistant busbar plate assembly, characterized bythat it comprises a heat-insulating box (1), a movable assembly and a heat-dissipating assembly, as well as a temperature sensor (14) and a control unit, which are electrically connected to the battery management system, wherein the heat-dissipating assembly serves at least to extract the air inside the heat-insulating box (1) to the outside of the heat-insulating box (1); wherein an upper plate (2) is fixedly attached to an upper side of the heat-insulating box (1), on which upper plate a plurality of heat-dissipating strip openings (20) are provided, which communicate with the interior of the heat-insulating box (1); wherein a heat-insulating block (3) is provided at the bottom of the heat-dissipating strip openings (20), wherein the movable assembly serves at least to drive a plurality of heat-insulating blocks (3) synchronously to move in the longitudinal direction of the upper plate (2);wherein, when the heat insulating blocks (3) are moved, the heat dissipation strip openings (20) have one of three states, namely being completely blocked by the heat insulating block (3), partially blocked by the heat insulating block (3), or not blocked by the heat insulating block (3); [2] Battery management system-based heat-resistant busbar plate assembly according to claim 1, characterized by in that the heat dissipation assembly comprises a heat dissipation fan (15) fixedly installed on one side of an inner wall of the heat insulation box (1), wherein an air outlet end of the heat dissipation fan (15) is fixedly connected to an air outlet pipe (12), wherein a side of the heat insulation box (1) remote from the heat dissipation fan (15) is fixedly connected to an air inlet pipe (11), and wherein the heat dissipation fan (15) is electrically connected to the control unit. [3] Battery management system-based heat-resistant busbar plate assembly according to claim 2, characterized byin that the movable assembly comprises a drive motor (31) which is fixedly installed on one side of the underside of the upper plate (2), wherein an output end of the drive motor (31) is fixedly connected to a threaded rod (32) and an end of the threaded rod (32) remote from the drive motor (31) is rotatably connected to the other side of the underside of the upper plate (2), wherein a movable block (33) is screwed to the threaded rod (32), wherein the underside of the upper plate (2) is further fixedly connected to a limiting strip (34) arranged parallel to the threaded rod (32), wherein one end of the plurality of heat-insulating blocks (3) is fixedly connected to one side of the movable block (33) and the other end of the plurality of heat-insulating blocks (3) is slidably connected to the limiting strip (34), and wherein the drive motor (31) is electrically connected to the control unit. [4] Battery management system-based heat-resistant busbar plate assembly according to claim 3, characterized by that a heat-conducting silicone layer (13) for placing the busbar plate is permanently installed at a lower end of the inner wall of the heat insulation box (1). [5] Battery management system-based heat-resistant busbar plate assembly according to claim 1, characterized by that an upper end surface of the heat insulating block (3) is in contact with a lower end surface of the upper plate (2), wherein the cross-sectional area of ​​the heat insulating block (3) is larger than the cross-sectional area of ​​the heat dissipation strip opening (20). [6] Battery management system-based heat-resistant busbar plate assembly according to one of claims 1 to 5, characterized byin that the thermal insulation box (1) comprises an inner layer (103), a first flame-retardant layer (102) and a first thermal insulation layer (101) which are connected one after the other from the inside to the outside, wherein the upper plate (2) and the thermal insulation box (1) are made of the same material, wherein the thermal insulation block (3) comprises a second flame-retardant layer (301), and wherein a second thermal insulation layer (300) is firmly connected to the outside of the second flame-retardant layer (301).

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