V-shaped fin liquid cooling system

Abstract

The invention relates to the field of battery cooling equipment, in particular to a V-shaped fin liquid cooling system which comprises a liquid cooling plate, battery packs, cooling modules and heating modules, the upper surface of the liquid cooling plate is fixedly connected with the battery packs at equal intervals, and the cooling modules and the heating modules are arranged in the battery packs. A liquid inlet is formed in the outer wall surface of one end of the liquid cooling plate in a penetrating mode, a liquid outlet is formed in the outer wall of the end, away from the liquid inlet, of the liquid cooling plate in a penetrating mode, a plurality of rectangular straight flow channels are formed in the inner bottom wall of the liquid cooling plate, and the problem that a conventional liquid cooling plate cannot meet the high-discharge-rate heat dissipation requirement of a battery pack is solved; meanwhile, the power consumption of the battery pack is reduced, and electronic expansion valves of the cooling module and the heating module are controlled. The working temperature of the battery can be dynamically controlled within a proper working temperature range, when the temperature of the battery pack is proper, the thermal management system is closed, the power consumption of the battery pack is reduced by adopting natural cooling, and dynamic balance is realized.

Description

Technical Field

[0001] The invention relates to the field of battery cooling equipment, in particular to a V-shaped fin liquid cooling system. Background Art

[0002] Today, the global energy crisis and environmental pollution are becoming increasingly serious. New energy vehicles are developing rapidly due to their advantages such as environmental protection, energy saving, low noise, simple and compact structure. As the core of new energy vehicles, the performance of power batteries will directly affect the endurance of the entire vehicle as well as the power performance, reliability and safety of the vehicle. The operating temperature is the determining factor affecting battery performance. Too high or too low temperature will reduce the working performance of the power battery. When the battery temperature rises too much during operation and the heat cannot be discharged in time, heat accumulation will occur, which will cause irreversible electrochemical reactions inside the battery. In severe cases, it will cause thermal runaway or even explosion. Therefore, in order to ensure the safety of new energy vehicles, controlling the operating temperature of the power battery within an appropriate range has become the research focus of scholars and practitioners in the field today.

[0003] At present, power battery thermal management systems can be divided into: air-based, liquid-based, and phase change materials according to the working medium. Air-based thermal management technology uses air as the working medium, with a simple structure but low efficiency; liquid-based thermal management uses liquid as the cooling medium, with a compact structure and high heat transfer coefficient; phase change materials use the material's own phase change latent heat to control the temperature of the power battery, but there is a risk of leakage. The existing liquid-based battery thermal management system cannot meet the needs of battery packs at high discharge rates, so it is necessary to propose a V-shaped fin liquid cooling system. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a V-shaped fin liquid cooling system.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a V-shaped fin liquid cooling system, including a liquid cooling plate, a battery pack, a cooling module and a heating module, the upper surface of the liquid cooling plate is equidistantly fixedly connected with the battery pack, the battery pack is provided with a cooling module and a heating module inside, a liquid inlet is penetrated through the outer wall surface of one end of the liquid cooling plate, a liquid outlet is penetrated through the outer wall of the end of the liquid cooling plate away from the liquid inlet, a plurality of rectangular direct current channels are provided on the inner bottom wall of the liquid cooling plate, and a plurality of groups of V-shaped fins are equidistantly fixedly connected to the inner bottom wall of the liquid cooling plate relative to both sides of the rectangular direct current channels.

[0006] Specifically, the cooling module includes a first temperature sensor, a first electronic expansion valve and a condenser.

[0007] Specifically, the heating module includes a second temperature sensor, a second electronic expansion valve and a heating device.

[0008] Specifically, several groups of the V-shaped ribs are discretely arranged with a break in the middle and staggered by 10 mm, and the ribs of several groups of the V-shaped ribs are arranged at a spacing of P = 50 mm. Several groups of the V-shaped ribs are arranged in the liquid cooling plate flow channel with equal spacing and a total of 7 groups are arranged.

[0009] Specifically, the interface shape of several groups of the V-shaped fins is a triangle, the height of several groups of the V-shaped fins is 1 mm, and the guide angle of several groups of the V-shaped fins is α=45°.

[0010] Specifically, the battery pack is composed of 12 square lithium iron phosphate batteries connected in series and parallel.

[0011] Specifically, the liquid cooling plate and the battery pack are fixed by bolts.

[0012] Beneficial effects of the present invention:

[0013] (1) The V-shaped fin liquid cooling system of the present invention increases the heat exchange area in the flow channel of the liquid cooling plate by adding new discrete V-shaped fins in the liquid cooling plate, thereby enhancing the interference of the cooling medium, separating the flow, destroying the boundary layer, thereby enhancing the heat exchange performance and reducing the flow channel pressure drop of the liquid cooling plate, thereby solving the problem that conventional liquid cooling plates cannot meet the heat dissipation requirements of battery packs at high discharge rates and reducing the power consumption of the battery pack.

[0014] (2) The V-shaped fin liquid cooling system of the present invention can dynamically control the operating temperature of the battery within a suitable operating temperature by setting a temperature monitoring system, setting high and low temperature warnings, obtaining real-time temperature information of the battery pack through a temperature sensor, and controlling the electronic expansion valves of the cooling module and the heating module. When the temperature of the battery pack is at a suitable temperature, the thermal management system is turned off, and natural cooling is used to reduce the power consumption of the battery pack, thereby achieving dynamic balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 A front view structural schematic diagram of a V-shaped fin liquid cooling system provided by the present invention;

[0017] Figure 2 A schematic diagram of the front view structure of a liquid cooling plate of a V-shaped fin liquid cooling system provided by the present invention;

[0018] Figure 3 A schematic diagram of the structure of a battery management system of a V-shaped fin liquid cooling system provided by the present invention;

[0019] Figure 4 Schematic diagram of the thermal management system provided by the present invention.

[0020] In the figure: 1. liquid cooling plate; 2. battery pack; 3. cooling module; 31. first temperature sensor; 32. first electronic expansion valve; 33. condenser; 4. heating module; 41. second temperature sensor; 42. second electronic expansion valve; 43. heating device; 5. liquid inlet; 6. liquid outlet; 7. V-shaped ribs. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] like Figure 1-Figure 3 As shown, the V-shaped fin liquid cooling system of the present invention includes a liquid cooling plate 1, a battery pack 2, a cooling module 3 and a heating module 4. The upper surface of the liquid cooling plate 1 is equidistantly fixedly connected with the battery pack 2, and the cooling module 3 and the heating module 4 are arranged inside the battery pack 2. A liquid inlet 5 is penetrated through the outer wall surface of one end of the liquid cooling plate 1, and a liquid outlet 6 is penetrated through the outer wall of the end of the liquid cooling plate 1 away from the liquid inlet 5. A plurality of rectangular direct current channels are arranged on the inner bottom wall of the liquid cooling plate 1, and a plurality of groups of V-shaped fins 7 are equidistantly fixedly connected to the inner bottom wall of the liquid cooling plate 1 relative to both sides of the rectangular direct current channels.

[0023] The cooling module 3 includes a first temperature sensor 31 , a first electronic expansion valve 32 and a condenser 33 .

[0024] The heating module 4 includes a second temperature sensor 41 , a second electronic expansion valve 42 and a heating device 43 .

[0025] Specifically, several groups of V-shaped fins 7 are discretely arranged with a break in the middle and staggered by 10 mm. The fins of several groups of V-shaped fins 7 are arranged at a spacing of P = 50 mm. Several groups of V-shaped fins 7 are arranged in the liquid cooling plate flow channel with equal spacing and a total of 7 groups are arranged.

[0026] The interface shape of the several groups of V-shaped fins 7 is a triangle, the height of the several groups of V-shaped fins 7 is 1 mm, and the guide angle of the several groups of V-shaped fins 7 is α=45°.

[0027] Among them, the battery pack 2 is composed of 12 square lithium iron phosphate batteries connected in series and parallel.

[0028] The liquid cooling plate 1 and the battery pack 2 are fixed by bolts.

[0029] When in use, the cooling module 3 and the heating module 4 are controlled by the control system. An external water pump and a water tank are provided on one side of the liquid cooling plate 1. The external water pump is driven to do work, and the cooling liquid in the water tank enters the liquid cooling plate 1 to dissipate heat for the battery pack 2. When the temperature of the battery pack 2 is between 20 and 40°C, it is naturally cooled, and the control system is not started. When the temperature of the battery pack 2 is higher than 40°C, the cooling module 3 is started, and the control system obtains the temperature data of the battery pack 2 in real time through the first temperature sensor 31. When the temperature is higher than 40°C, the external water pump is driven to do work, and the cooling liquid in the water tank enters the liquid cooling plate 1. The first electronic expansion valve 32 is opened, and the second electronic expansion valve 42 is closed, and the liquid enters the liquid cooling plate 1 with discrete V-shaped fins 7 to exchange heat with the battery pack 2, and then the heat of the high-temperature cooling liquid is dissipated into the atmosphere through the condenser 33. When the temperature is lower than 20°C, the heating module 4 is started, and the control system obtains the temperature data of the battery pack 2 in real time through the second temperature sensor 41. When the temperature is lower than 0°C, the control system closes the first electronic expansion valve 32, opens the second electronic expansion valve 42, and the water pump drives the cooling medium to enter the heating device 43, and then flows into the liquid cooling plate 1 to heat the battery pack 2.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A V-shaped fin liquid cooling system, comprising a liquid cooling plate (1), a battery pack (2), a cooling module (3), and a heating module (4), characterized in that: A battery pack (2) is fixedly connected to the upper surface of the liquid cooling plate (1) at equal distances, a cooling module (3) and a heating module (4) are arranged inside the battery pack (2), a liquid inlet (5) is penetrated through the outer wall surface of one end of the liquid cooling plate (1), a liquid outlet (6) is penetrated through the outer wall of the end of the liquid cooling plate (1) away from the liquid inlet (5), a plurality of rectangular direct current channels are arranged on the inner bottom wall of the liquid cooling plate (1), and a plurality of groups of V-shaped ribs (7) are fixedly connected to the inner bottom wall of the liquid cooling plate (1) at equal distances relative to both sides of the rectangular direct current channels.

2. The V-shaped fin liquid cooling system according to claim 1, characterized in that: The cooling module (3) comprises a first temperature sensor (31), a first electronic expansion valve (32) and a condenser (33).

3. The V-shaped fin liquid cooling system according to claim 1, characterized in that: The heating module (4) comprises a second temperature sensor (41), a second electronic expansion valve (42) and a heating device (43).

4. The V-shaped fin liquid cooling system according to claim 1, characterized in that: Several groups of the V-shaped ribs (7) are discretely arranged with a break in the middle and staggered by 10 mm. The ribs of several groups of the V-shaped ribs (7) are arranged at a spacing of P=50 mm in the liquid cooling plate flow channel. Several groups of the V-shaped ribs (7) are arranged in an equidistant manner and a total of 7 groups are arranged.

5. The V-shaped fin liquid cooling system according to claim 1, characterized in that: The interface shape of several groups of V-shaped fins (7) is a triangle, the height of several groups of V-shaped fins (7) is 1 mm, and the guide angle of several groups of V-shaped fins (7) is α=45°.

6. The V-shaped fin liquid cooling system according to claim 1, characterized in that: The battery pack (2) is composed of 12 square lithium iron phosphate batteries connected in series and parallel.

7. The V-shaped fin liquid cooling system according to claim 1, characterized in that: The liquid cooling plate (1) and the battery pack (2) are fixed by bolts.

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