Heat dissipation device for battery pack of pure electric vehicle

Abstract

The utility model relates to the field of battery heat dissipation, and discloses a battery pack heat dissipation device for a pure electric vehicle, which comprises a battery heat dissipation frame, the battery heat dissipation frame is arranged above a battery pack of an electric vehicle, the battery pack of the electric vehicle is arranged on the upper surface of a battery pack base, and a movable adjusting mechanism is arranged between the battery heat dissipation frame and the battery pack base. The movable adjusting mechanism comprises a limiting plate, a transmission screw, a first motor, a driving sliding block and a connecting arm, through the arranged movable adjusting mechanism, when a battery pack of the electric vehicle runs, the battery can generate heat, the heat is taken away through rotation of the rotating fan blades under driving of the second motor, meanwhile, the transmission screw is driven by the first motor to rotate, and the rotating fan blades are driven by the second motor to rotate. A driving sliding block in threaded connection with the outer side of a transmission screw rod and a connecting arm move in the front-back direction, so that the battery heat dissipation frame can move front and back, the position adjustment of the heat dissipation mechanism is realized, and different parts of the battery pack can be subjected to heat dissipation.

Description

Technical Field

[0001] The utility model relates to the field of battery heat dissipation, in particular to a heat dissipation device for a battery pack of a pure electric vehicle. Background Art

[0002] The heat dissipation device of the battery pack of a pure electric vehicle is a system used to manage and regulate the temperature of the battery pack, ensuring that the battery pack remains within the appropriate temperature range during operation to protect battery performance and extend its service life. The battery generates heat during the charging and discharging process. If the heat cannot be effectively dissipated, the battery temperature will rise, which may lead to a decrease in battery performance, capacity loss and even safety hazards.

[0003] According to the Chinese authorized patent announcement number: CN215771270U, ​​a new energy vehicle battery pack cooling and heat dissipation device is disclosed, including a battery seat, a fixing seat, a front air inlet, a rear air outlet, a side air inlet, a cushion block, a cover and an upper air outlet; a fixing seat is arranged on the outer wall around the lower part of the battery seat, and the battery seat and the fixing seat are connected by welding; the front air inlet is located at the front end of the battery seat; the rear air outlet is located at the rear end of the battery seat; the side air inlet is located on both sides of the battery seat; the cushion block is located inside the battery seat; the front air inlet, the rear air outlet, the side air inlet and the cushion block are an integrally formed structure with the battery seat; the cover is arranged on the upper part of the battery seat, and the cover and the battery seat are clamped by a gap fit; the upper air outlet is located on the upper part of the cover, and the upper air outlet and the cover are an integrally formed structure. The utility model has good ventilation cooling and heat dissipation effect, can fully improve the service life and operation stability of the battery pack, and greatly improve the practical performance and practical value. However, the battery pack heat dissipation device still has shortcomings. The current pure electric vehicle battery pack heat dissipation devices are mostly installed in a fixed position of the battery pack, and cannot achieve uniform heat dissipation of different parts inside the battery pack. Some battery cells may overheat, while other parts do not have enough heat dissipation. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pure electric vehicle battery pack heat dissipation device, which solves the problem that most of the current pure electric vehicle battery pack heat dissipation devices are installed in a fixed position of the battery pack, and cannot achieve uniform heat dissipation of different parts inside the battery pack, and some battery cells may overheat while other parts have insufficient heat dissipation.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a pure electric vehicle battery pack heat dissipation device, including a battery heat dissipation frame, the battery heat dissipation frame is arranged above the electric vehicle battery pack, the electric vehicle battery pack is arranged on the upper surface of the battery pack base, a movable adjustment mechanism is arranged between the battery heat dissipation frame and the battery pack base, the movable adjustment mechanism includes a limit plate, a transmission screw, a motor, a driving slider and a connecting arm, the left and right sides of the upper surface of the battery pack base are provided with a transmission screw, the front and rear ends of the two transmission screws are respectively rotatably connected to the inner sides of the two limit plates, the lower end of the limit plate is fixedly connected to the upper surface of the battery pack base, the outer side of the transmission screw is threadedly connected to two driving sliders, the upper surfaces of the two driving sliders are fixedly connected to the connecting arms, and the upper ends of the connecting arms are fixedly connected to the lower surface of the battery heat dissipation frame;

[0006] A battery fire extinguishing mechanism is arranged on the front side of the battery cooling frame, and the battery fire extinguishing mechanism includes a support plate, a dry powder box, a conveying pump, a powder guide pipe, a powder discharge pipe, a dry powder nozzle and a fire extinguishing frame. The fire extinguishing frame is fixedly connected to the front side of the battery cooling frame, a powder discharge pipe is arranged on the inner side of the fire extinguishing frame, and a plurality of dry powder nozzles are arranged on the lower surface of the powder discharge pipe. Conveying pumps are arranged on both sides of the fire extinguishing frame, the powder outlet end of the conveying pump is connected to the powder discharge pipe, the powder inlet end of the conveying pump is connected to the powder guide pipe, and the end of the powder guide pipe away from the conveying pump is arranged inside the dry powder box. A smoke switch is arranged on the front side of the fire extinguishing frame, and the smoke switch is electrically connected to the conveying pump.

[0007] Preferably, a motor 1 is provided on one side of the limit plate, and an output end of the motor 1 is drivingly connected to a driving screw.

[0008] Preferably, a heat dissipation mechanism is provided on the upper surface of the battery cooling frame, and the heat dissipation mechanism includes rotating fan blades, motor 2, leaf plates and a heat dissipation box. The number of the heat dissipation boxes is set to three, and the lower ends of the three heat dissipation boxes are fixedly connected to the upper surface of the battery cooling frame.

[0009] Preferably, a leaf plate is fixedly connected to the upper surface of the heat dissipation box, a second motor is arranged below the leaf plate, and an output end of the second motor is transmission-connected to a rotating fan blade.

[0010] Preferably, the upper surface of the page plate is provided with holes and grooves.

[0011] Preferably, the lower end of the dry powder box is fixedly connected to the upper surface of a support plate, and the support plate is fixedly connected to the outer sides of the two connecting arms.

[0012] Beneficial Effects

[0013] The utility model provides a heat dissipation device for a battery pack of a pure electric vehicle. Compared with the prior art, it has the following beneficial effects:

[0014] 1. In the utility model, through the mobile adjustment mechanism, when the electric vehicle battery pack is running, the battery will generate heat, which is driven by the second motor to take away the heat through the rotation of the rotating fan blade. At the same time, the first motor drives the transmission screw to rotate, and the driving slider connected to the outer thread of the transmission screw moves together with the connecting arm in the forward and backward direction, so that the battery cooling frame can move forward and backward, thereby realizing the position adjustment of the cooling mechanism, so that different parts of the battery pack can be cooled;

[0015] 2. In the utility model, through the battery fire extinguishing mechanism, when a fire occurs in the electric vehicle battery pack, the smoke at the fire scene will spread to the front side of the fire extinguishing rack, triggering the smoke switch. After the smoke switch is triggered, it immediately sends a signal to the delivery pump. After receiving the signal, the delivery pump starts and starts working. After the delivery pump starts, the dry powder is transported from the dry powder box to the powder discharge pipe through the powder guide pipe. The multiple dry powder nozzles arranged on the lower surface of the powder discharge pipe spray the dry powder onto the surface of the electric vehicle battery pack, thereby achieving the purpose of extinguishing the fire in the early stage of the electric vehicle battery pack and reducing the fire hazard of the electric vehicle battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front three-dimensional structure of a pure electric vehicle battery pack heat dissipation device proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the rear three-dimensional structure of a pure electric vehicle battery pack heat dissipation device proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of a pure electric vehicle battery pack heat dissipation device proposed by the utility model from an oblique upper perspective;

[0019] Figure 4 A pure electric vehicle battery pack heat dissipation device proposed by the utility model Figure 1 A is an enlarged view of the middle image.

[0020] Legend:

[0021] 1. Battery cooling rack; 2. Mobile adjustment mechanism; 201. Limiting plate; 202. Transmission screw; 203. Motor 1; 204. Driving slider; 205. Connecting arm; 3. Battery fire extinguishing mechanism; 301. Support plate; 302. Dry powder box; 303. Delivery pump; 304. Powder guide tube; 305. Powder discharge tube; 306. Dry powder nozzle; 307. Fire extinguishing rack; 308. Smoke switch; 4. Electric vehicle battery pack; 5. Battery pack base; 6. Cooling mechanism; 601. Rotating fan blades; 602. Motor 2; 603. Leaf plate; 604. Cooling box. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 4 The utility model provides two technical solutions, which specifically include the following embodiments:

[0024] Embodiment 1:

[0025] A heat dissipation device for a battery pack of a pure electric vehicle comprises a battery heat dissipation frame 1, the battery heat dissipation frame 1 is arranged above a battery pack 4 of an electric vehicle, the battery pack 4 of the electric vehicle is arranged on the upper surface of a battery pack base 5, a movable adjustment mechanism 2 is arranged between the battery heat dissipation frame 1 and the battery pack base 5, the movable adjustment mechanism 2 comprises a limit plate 201, a transmission screw 202, a motor 203, a driving slider 204 and a connecting arm 205, transmission screws 202 are arranged on both sides of the upper surface of the battery pack base 5, the front and rear ends of the two transmission screws 202 are respectively rotatably connected to the inner sides of the two limit plates 201, the lower end of the limit plate 201 is fixedly connected to the upper surface of the battery pack base 5, the outer side of the transmission screw 202 is threadedly connected to two driving sliders 204, the upper surfaces of the two driving sliders 204 are fixedly connected to the connecting arm 205, the lower end of the driving slider 204 is slidably connected to the upper surface of the battery pack base 5, and the upper end of the connecting arm 205 is fixedly connected to the battery heat dissipation frame 1, a motor 1 203 is arranged on one side of the limit plate 201, and the output end of the motor 1 203 is transmission-connected with the driving screw 202. A heat dissipation mechanism 6 is arranged on the upper surface of the battery heat dissipation frame 1. The heat dissipation mechanism 6 includes a rotating fan blade 601, a motor 2 602, a leaf plate 603 and a heat dissipation box 604. The number of heat dissipation boxes 604 is set to three, and the lower ends of the three heat dissipation boxes 604 are fixedly connected to the upper surface of the battery heat dissipation frame 1. The upper surface of the heat dissipation box 604 is fixedly connected with a leaf plate 603, and a motor 2 602 is arranged below the leaf plate 603. The output end of the motor 2 602 is transmission-connected with the rotating fan blade 601, and a hole groove is arranged on the upper surface of the leaf plate 603. The motor 2 602 is electrically connected to the smoke switch 308. After the smoke switch 308 receives the smoke signal, on the one hand, it triggers the delivery pump 303 to work, and on the other hand, it stops the motor 2 602 from working to prevent the dry powder from being sucked away by the adsorption force generated by the rotation of the rotating fan blade 601.

[0026] During operation, when the electric vehicle battery pack 4 is running, the battery will generate heat, which is driven by the motor 2 602 to take away the heat through the rotation of the rotating fan blade 601. At the same time, the transmission screw 202 is driven to rotate by the motor 1 203, and the driving slider 204 connected to the outer side of the transmission screw 202 moves together with the connecting arm 205 in the forward and backward directions, so that the battery cooling frame 1 can move forward and backward, thereby realizing the position adjustment of the heat dissipation mechanism 6, so that different parts of the battery pack can be cooled. In addition, the moving speed of the heat dissipation mechanism 6 can be adjusted by the output end speed of the motor 1 203, thereby achieving the purpose of uniform heat dissipation.

[0027] Embodiment 2:

[0028] On the basis of the first embodiment, a battery fire extinguishing mechanism 3 is arranged on the front side of the battery cooling frame 1, and the battery fire extinguishing mechanism 3 includes a support plate 301, a dry powder box 302, a delivery pump 303, a powder guide tube 304, a powder discharge tube 305, a dry powder nozzle 306 and a fire extinguishing frame 307. The fire extinguishing frame 307 is fixedly connected to the front side of the battery cooling frame 1, and a powder discharge tube 305 is arranged on the inner side of the fire extinguishing frame 307. A plurality of dry powder nozzles 306 are arranged on the lower surface of the powder discharge tube 305. Delivery pumps 303 are arranged on both sides of the fire extinguishing frame 307. The powder outlet end of the delivery pump 303 is connected to the powder discharge tube 305, and the powder inlet end of the delivery pump 303 is connected to the guide tube 304. The powder pipes 304 are connected to each other, and one end of the powder pipe 304 away from the delivery pump 303 is arranged inside the dry powder box 302. A smoke switch 308 is arranged on the front side of the fire extinguishing frame 307. The model of the smoke switch 308 is FS100-12. When smoke is detected, FS100-12 will output a signal to the delivery pump 303 of the fire extinguishing system to start the fire extinguishing program. The smoke switch 308 is electrically connected to the delivery pump 303. A dry powder fire extinguishing agent is arranged inside the dry powder box 302. The lower end of the dry powder box 302 is fixedly connected to the upper surface of the support plate 301, and the support plate 301 is fixedly connected to the outer sides of the two connecting arms 205.

[0029] When a fire occurs in the electric vehicle battery pack 4, the smoke at the fire scene will spread to the front side of the fire extinguishing rack 307, triggering the smoke switch 308. After the smoke switch 308 is triggered, it immediately sends a signal to the delivery pump 303. After receiving the signal, the delivery pump 303 starts and starts working. After the delivery pump 303 starts, the dry powder is transported from the dry powder box 302 to the powder discharge pipe 305 through the powder guide pipe 304. The multiple dry powder nozzles 306 arranged on the lower surface of the powder discharge pipe 305 spray the dry powder onto the surface of the electric vehicle battery pack 4, thereby achieving the purpose of extinguishing the fire in the early stage of the electric vehicle battery pack 4 and reducing the fire hazard of the electric vehicle battery pack 4.

[0030] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the protection scope of the present application.

Claims

1. A heat dissipation device for a battery pack of a pure electric vehicle, comprising a battery heat dissipation frame (1), characterized in that: The battery cooling rack (1) is arranged above the electric vehicle battery pack (4), and the electric vehicle battery pack (4) is arranged on the upper surface of the battery pack base (5). A movable adjustment mechanism (2) is arranged between the battery cooling rack (1) and the battery pack base (5), and the movable adjustment mechanism (2) comprises a limit plate (201), a transmission screw (202), a motor (203), a driving slider (204) and a connecting arm (205). The upper surface of the battery pack base (5) is provided with a transmission screw (202), a motor (203), a driving slider (204) and a connecting arm (205). A movable screw rod (202), the front and rear ends of the two transmission screw rods (202) are respectively rotatably connected to the inner sides of the two limit plates (201), the lower ends of the limit plates (201) are fixedly connected to the upper surface of the battery pack base (5), the outer sides of the transmission screw rod (202) are threadedly connected to two driving sliders (204), the upper surfaces of the two driving sliders (204) are fixedly connected to connecting arms (205), and the upper ends of the connecting arms (205) are fixedly connected to the lower surface of the battery cooling frame (1); A battery fire extinguishing mechanism (3) is arranged on the front side of the battery cooling frame (1), and the battery fire extinguishing mechanism (3) comprises a support plate (301), a dry powder box (302), a delivery pump (303), a powder guide tube (304), a powder discharge tube (305), a dry powder spray head (306) and a fire extinguishing frame (307), wherein the fire extinguishing frame (307) is fixedly connected to the front side of the battery cooling frame (1), a powder discharge tube (305) is arranged on the inner side of the fire extinguishing frame (307), and a plurality of dry powder spray heads are arranged on the lower surface of the powder discharge tube (305). (306), a delivery pump (303) is arranged on both sides of the fire extinguishing frame (307), the powder outlet end of the delivery pump (303) is connected to the powder discharge pipe (305), the powder inlet end of the delivery pump (303) is connected to the powder guide pipe (304), and the end of the powder guide pipe (304) away from the delivery pump (303) is arranged inside the dry powder box (302), and a smoke switch (308) is arranged on the front side of the fire extinguishing frame (307), and the smoke switch (308) is electrically connected to the delivery pump (303).

2. A heat dissipation device for a battery pack of a pure electric vehicle according to claim 1, characterized in that: A motor 1 (203) is disposed on one side of the limit plate (201), and an output end of the motor 1 (203) is drivingly connected to a driving screw rod (202).

3. A heat dissipation device for a battery pack of a pure electric vehicle according to claim 1, characterized in that: The upper surface of the battery cooling frame (1) is provided with a cooling mechanism (6), the cooling mechanism (6) comprising rotating blades (601), a second motor (602), a leaf plate (603) and a cooling box (604), the number of the cooling boxes (604) being set to three, and the lower ends of the three cooling boxes (604) are all fixedly connected to the upper surface of the battery cooling frame (1).

4. A heat dissipation device for a battery pack of a pure electric vehicle according to claim 3, characterized in that: The upper surface of the heat dissipation box (604) is fixedly connected with a leaf plate (603), a second motor (602) is arranged below the leaf plate (603), and the output end of the second motor (602) is drivingly connected with a rotating fan blade (601).

5. A heat dissipation device for a battery pack of a pure electric vehicle according to claim 3, characterized in that: The upper surface of the leaf plate (603) is provided with holes and grooves.

6. A heat dissipation device for a battery pack of a pure electric vehicle according to claim 1, characterized in that: The lower end of the dry powder box (302) is fixedly connected to the upper surface of the support plate (301), and the support plate (301) is fixedly connected to the outer sides of the two connecting arms (205).

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