Thermal management device for battery of electric vehicle

Abstract

The invention discloses an electric vehicle battery heat management device which comprises a box body, a water tank and a battery pack which are arranged at the lower end of the box body, a vertical plate and a servo motor which are mounted on the inner top wall of the box body, a controller arranged on the outer wall of the box body, a residual gear mounted at the output end of the servo motor, and an inner gear ring connected with teeth of the residual gear in a meshed mode. The convex sliding block and the moving plate are installed on the two sides of the inner gear ring respectively, the through groove is formed in the middle of the moving plate, and the first cooling fan is installed in the through groove. The circulating pipe and the water pumping pipe are connected with a water inlet and a water outlet of the water pump respectively, the semiconductor chilling plate is installed in the water tank, and the second cooling fan is installed in the middle of the front end of the box body. According to the invention, water-cooling heat dissipation and air-cooling heat dissipation are simultaneously realized; the heat dissipation area is increased by moving the first heat dissipation fan, airflow exchange can be rapidly carried out through cooperation with the second heat dissipation fan, water in the box is cooled by arranging the semiconductor chilling plate, and the heat dissipation performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery heat dissipation, and in particular to a thermal management device for an electric vehicle battery. Background Art

[0002] With the exhaustion of energy, the continuous rise in oil prices, and the deteriorating environment, countries have taken the development of new energy vehicles as their national development strategy. The key to developing new energy vehicle technology lies in the development of high-performance power supply technology. Traditional battery products are difficult to meet the requirements of automobile life and power performance. Therefore, the current technical bottleneck of new energy vehicles lies in the power battery system. For battery products, lithium-ion power batteries are considered to be the most likely to achieve breakthroughs and form industrialization in a relatively short period of time. The power batteries of existing electric vehicles are generally composed of square lithium batteries or cylindrical lithium batteries in series or parallel to form high-power and large-capacity lithium battery packs. According to the heat generation mechanism of the battery, the battery pack will generate a lot of heat during the high-current charging and discharging process, which will cause the existing electric vehicle battery to have poor heat dissipation and poor battery temperature uniformity. When the heat distribution inside the power battery is uneven, it will cause the life of the single battery to be different, which will lead to the attenuation of the power battery capacity and life, and even thermal runaway due to the sharp rise in the internal temperature of the power battery. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a thermal management device for an electric vehicle battery.

[0004] In order to achieve the above-mentioned technical effect, the present invention is implemented through the following technical scheme: a thermal management device for an electric vehicle battery, comprising a box body, characterized in that: a water tank and a battery pack are arranged at the lower end of the box body, a vertical plate and a servo motor are installed on the inner top wall of the box body, a controller is arranged on the outer wall of the box body, a residual gear is installed at the output end of the servo motor, an inner gear ring meshingly connected with the teeth of the residual gear, a convex slider and a movable plate are respectively installed on both sides of the inner gear ring, a through groove is arranged in the middle of the movable plate, a first cooling fan is installed inside the through groove, a T-shaped slider is arranged on the top of the movable plate, a water pump is arranged on the top of the water tank, a circulation pipe and a pumping pipe are respectively connected to the water inlet and outlet of the water pump, a semiconductor refrigeration plate is installed inside the water tank, and a second cooling fan is installed in the middle of the front end of the box body.

[0005] Furthermore, the circulation pipe is wound around the outside of the battery pack, and both ends of the circulation pipe are respectively connected to the water outlet of the water pump and the water tank inlet, and both ends of the water pump pipe are respectively connected to the water inlet of the water pump and the water tank outlet.

[0006] Furthermore, a convex sliding groove is provided on one side of the vertical plate, and the convex sliding block is slidably installed inside the convex sliding groove; the length of the convex sliding groove is smaller than the length of the vertical plate.

[0007] Furthermore, a ventilation hole is provided on the top of the box body, a heat dissipation hole is provided on the front of the box body, dustproof nets are provided inside the ventilation hole and the heat dissipation hole, the position of the first cooling fan corresponds to the position of the battery pack and the ventilation hole respectively, and the position of the second cooling fan corresponds to the position of the heat dissipation hole.

[0008] Furthermore, the wind direction of the first cooling fan is from inside to outside; the wind direction of the second cooling fan is from outside to inside.

[0009] Furthermore, the battery pack is electrically connected to the controller through wires, and the controller is electrically connected to the servo motor, the water pump, the semiconductor cooling plate, the first cooling fan and the second cooling fan through the wires.

[0010] Furthermore, a T-shaped slide groove is provided at the top of the box body, and the T-shaped sliding block is slidably installed inside the slide groove; the T-shaped slide groove is located on the right side of the vent; the length of the T-shaped slide groove is the same as the length of the convex slide groove.

[0011] Furthermore, the movable plate is an L-shaped plate, the through groove is arranged in the middle of the long plate of the L-shaped plate, and the T-shaped sliding block is arranged on the top of the short plate of the L-shaped plate.

[0012] The beneficial effects of the present invention are:

[0013] The present invention provides a vertical plate, a servo motor, a residual gear, an internal gear ring, a convex slider, a movable plate, a first cooling fan, a T-shaped slider and a second cooling fan, so that the device has the ability to dissipate heat through air cooling, and can drive the first cooling fan to move by moving the movable plate, thereby increasing the heat dissipation area and achieving the purpose of improving the heat dissipation performance; by providing a water tank, a water pump, a water suction pipe, a circulation pipe and a semiconductor refrigeration plate, the device has the effect of water cooling, and heat exchange is performed during use through the circulation pipe; in summary, the present invention dissipates heat through a combination of air cooling and water cooling, thereby improving the heat dissipation effect and achieving the purpose of improving the heat dissipation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 3 It is a schematic structural diagram of a front cross-section of the present invention;

[0018] Figure 4 It is a schematic diagram of the structure of the top section of the present invention.

[0019] In the figure: 1. box body; 2. water tank; 3. battery pack; 4. vertical plate; 5. servo motor; 6. residual gear; 7. inner gear ring; 8. convex slider; 9. moving plate; 10. first cooling fan; 11. T-shaped slider; 12. water pump; 13. suction pipe; 14. circulation pipe; 15. semiconductor refrigeration plate; 16. second cooling fan; 17. dust net; 18. controller. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] See also Figures 1 to 4 As shown, a thermal management device for an electric vehicle battery comprises a box body 1, a vent is provided on the top of the box body 1, a heat dissipation port is provided on the front of the box body 1, dustproof nets 17 are provided inside the vent and the heat dissipation port, the positions of the first heat dissipation fan 10 correspond to the positions of the battery pack 3 and the vent, respectively, the position of the second heat dissipation fan 16 corresponds to the position of the heat dissipation port, a T-shaped slot is provided on the inner top wall of the box body 1, the end of the T-shaped slider 11 is located inside the T-shaped slot, and the T-shaped slider 11 can slide along the length direction of the T-shaped slot, and a water tank 2 and a battery pack 3 are provided on the inner bottom wall of the box body 1, respectively. By arranging the water tank 2, the water pump 12, the water pump 13, the circulation pipe 14 and the semiconductor refrigeration sheet 15, the thermal management device for the electric vehicle battery has the effect of water cooling and heat dissipation. During use, heat exchange is performed through the circulation pipe 14, and heat dissipation is performed through the combination of air cooling and water cooling, so as to improve the heat dissipation effect and achieve the purpose of improving the heat dissipation performance;

[0023] In some embodiments, a controller 18 is disposed on the outer wall of the box body 1, and the controller 18 is electrically connected to the battery pack 3, the servo motor 5, the water pump 12, the semiconductor cooling sheet 15, the first cooling fan 10 and the second cooling fan 16 through wires, so that the battery pack 3 supplies power to the controller while controlling who the battery pack 3 supplies power to; and realizing the power on and off control of the servo motor 5, the water pump 12, the semiconductor cooling sheet 15, the first cooling fan 10 and the second cooling fan 16.

[0024] In some embodiments, the wind direction of the first cooling fan 10 is from inside to outside, and the wind direction of the second cooling fan 16 is from outside to inside. The second cooling fan 16 blows the outside air into the box 1, and after passing through the battery pack 3, the first cooling fan 10 discharges the air in the box 1 out of the box 1, so as to realize air circulation, increase the air flow rate and the gas exchange speed inside and outside the box 1, and further enhance the air cooling effect.

[0025] In some embodiments, the inner top wall of the box body 1 is respectively installed with a vertical plate 4 and a servo motor 5. Through the arrangement of the vertical plate 4, the servo motor 5, the residual gear 6, the inner gear ring 7, the convex slider 8, the moving plate 9, the first cooling fan 10, the T-shaped slider 11 and the second cooling fan 16, the electric vehicle battery thermal management device has the ability to dissipate heat by air cooling;

[0026] In some embodiments, a convex groove is provided on one side of the vertical plate 4, and the end of the convex slider 8 is located inside the convex groove. The convex slider 8 can slide along the length direction of the convex groove. A residual gear 6 is installed at the output end of the servo motor 5. The residual gear 6 is meshed with an inner gear ring 7 through teeth. A convex slider 8 is installed on one side of the inner gear ring 7, and a moving plate 9 is installed on the other side of the inner gear ring 7. A through groove is provided inside the moving plate 9, and a first cooling fan 10 is arranged inside the through groove. A T-shaped slider 11 is installed on the top of the moving plate 9; when the servo motor 5 is actuated, the residual gear 6 is driven to rotate, and during the rotation process, the residual teeth of the residual gear 6 are respectively meshed with the two sides of the inner gear ring 7, driving the inner gear ring 7 to move back and forth, thereby driving the moving plate 9 to move back and forth, so that the first cooling fan 10 moves back and forth above the battery pack 3, increasing the heat dissipation area, thereby achieving the purpose of improving the heat dissipation performance;

[0027] In some embodiments, a water pump 12 is installed on the top of the water tank 2, a water pumping pipe 13 is provided at one end of the water pump 12, a circulation pipe 14 is provided at the other end of the water pump 12, the circulation pipe 14 is wound around the outside of the battery pack 3, the end of the circulation pipe 14 away from the water pump 12 passes through the water tank 2, the end of the water pumping pipe 13 away from the water pump 12 passes through the water tank 2, a semiconductor cooling sheet 15 is provided inside the water tank 2, and a second cooling fan 16 is provided on the inner wall of the box body 1. The water tank 2 provides a place for water-cooling transfer, so that the water entering the water tank 2 can be cooled by the semiconductor cooling sheet 15. Due to the operation of the water pumping pipe 13, the water in the circulation pipe 14 is continuously circulated, and the process of cooling in the water tank → cooling in the circulation pipe → transport by the water pump 12 → returning to the water tank is continuously realized, realizing the water cooling process.

[0028] Example 2

[0029] Working principle: When using the device, the battery pack 3 provides power to the servo motor 5, the water pump 12, the semiconductor cooling sheet 15, the first cooling fan 10 and the second cooling fan 16 respectively. The first cooling fan 10 and the second cooling fan 16 are used for air cooling and heat dissipation. The dustproof net 17 prevents dust from entering the interior of the box 1. The servo motor 5 drives the residual gear 6 to rotate, and the residual gear 6 is meshed with the inner gear ring 7. The convex slider 8 can be positioned and slid along the length direction of the convex slide groove, and the T-shaped slider 11 can be positioned and slid along the length direction of the T-shaped slide groove. The servo motor 5 is actuated to drive the residual gear 6 to rotate, and the residual gear 6 is meshed with the inner gear ring 7. The convex slider 8 can be positioned and slid along the length direction of the convex slide groove, and the T-shaped slider 11 can be positioned and slid along the length direction of the T-shaped slide groove. The teeth of the gear 6 mesh with the inner gear ring 7, driving the inner gear ring 7 to move, and then the inner gear ring 7 drives the moving plate 9 to move, so that the first cooling fan 10 moves back and forth to dissipate heat, thereby increasing the heat dissipation area. The semiconductor refrigeration plate 15 cools the water, and the water pump 12 draws cold water from the water tank 2 through the pumping pipe 13, so that the cold water enters the circulation pipe 14. The circulation pipe 14 is wrapped around the outside of the battery pack 3. The cold water flows inside the circulation pipe 14, so that the cold air emitted by the cold water exchanges heat with the heat generated by the battery pack 3 at work to cool down, thereby playing the role of water cooling. Through the combined effect of air cooling and water cooling, the heat dissipation performance is improved.

[0030] In summary, the present invention enables the electric vehicle battery thermal management device to dissipate heat by air cooling through the arrangement of the vertical plate 4, the servo motor 5, the residual gear 6, the internal gear ring 7, the convex slider 8, the movable plate 9, the first cooling fan 10, the T-shaped slider 11 and the second cooling fan 16, and the movement of the movable plate 9 facilitates the movement of the first cooling fan 10 to increase the heat dissipation area and achieve the purpose of improving the heat dissipation performance. Through the arrangement of the water tank 2, the water pump 12, the pumping pipe 13, the circulation pipe 14 and the semiconductor refrigeration plate 15, the electric vehicle battery thermal management device has the effect of water cooling. During use, heat exchange is carried out through the circulation pipe 14, and the heat dissipation is improved through the combination of air cooling and water cooling, thereby achieving the purpose of improving the heat dissipation performance.

Claims

1. A thermal management device for an electric vehicle battery, comprising a box, characterized in that: The lower end of the box body is provided with a water tank and a battery pack, a vertical plate and a servo motor installed on the inner top wall of the box body, a controller arranged on the outer wall of the box body, a residual gear installed on the output end of the servo motor, an inner gear ring meshing with the teeth of the residual gear, a convex slider and a movable plate respectively installed on both sides of the inner gear ring, a through groove arranged in the middle of the movable plate, a first cooling fan installed inside the through groove, a T-shaped slider arranged on the top of the movable plate, a water pump arranged on the top of the water tank, a circulation pipe and a water pumping pipe respectively connected to the water inlet and outlet of the water pump, a semiconductor refrigeration plate installed inside the water tank, and a second cooling fan installed in the middle of the front end of the box body.

2. The electric vehicle battery thermal management device according to claim 1, characterized in that: The circulation pipe is wound around the outside of the battery pack, and two ends of the circulation pipe are respectively connected to the water outlet of the water pump and the water tank inlet, and two ends of the water pump pipe are respectively connected to the water inlet of the water pump and the water tank outlet.

3. The electric vehicle battery thermal management device according to claim 1, characterized in that: A convex sliding groove is provided on one side of the vertical plate, and the convex sliding block is slidably installed inside the convex sliding groove; the length of the convex sliding groove is smaller than the length of the vertical plate.

4. The electric vehicle battery thermal management device according to claim 1, characterized in that: A vent is provided on the top of the box, a heat dissipation port is provided on the front of the box, dustproof nets are provided inside the vent and the heat dissipation port, the position of the first cooling fan corresponds to the position of the battery pack and the vent, respectively, and the position of the second cooling fan corresponds to the position of the heat dissipation port.

5. The electric vehicle battery thermal management device according to claim 1, characterized in that: The wind direction of the first cooling fan is from inside to outside; the wind direction of the second cooling fan is from outside to inside.

6. The electric vehicle battery thermal management device according to claim 1, characterized in that: The battery pack is electrically connected to the controller through wires, and the controller is electrically connected to the servo motor, the water pump, the semiconductor cooling sheet, the first cooling fan and the second cooling fan through wires.

7. The electric vehicle battery thermal management device according to claim 1, characterized in that: A T-shaped slide groove is provided at the top of the box body, and the T-shaped sliding block is slidably installed inside the slide groove; the T-shaped slide groove is located on the right side of the vent; the length of the T-shaped slide groove is the same as that of the convex slide groove.

8. The electric vehicle battery thermal management device according to claim 1, characterized in that: The movable plate is an L-shaped plate, the through groove is arranged in the middle of the long plate of the L-shaped plate, and the T-shaped sliding block is arranged on the top of the short plate of the L-shaped plate.

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