Thermal management liquid cooling plate for new energy automobile battery pack

Abstract

The invention discloses a heat management liquid cooling plate for a new energy automobile battery pack, and relates to the field of automobile battery pack heat dissipation liquid cooling plates, the heat management liquid cooling plate comprises an upper cover plate and a lower cover plate, the upper cover plate and the lower cover plate are each provided with a plurality of liquid cooling grooves, and the liquid cooling grooves of the upper cover plate are internally provided with a plurality of splitter plates; according to the thermal management liquid cooling plate for the new energy automobile battery pack, a plurality of splitter plates are arranged in the liquid cooling groove of the upper cover plate, and the liquid cooling groove is divided into a plurality of splitter grooves, so that cooling liquid is uniformly split, the flow velocity is effectively reduced, and the cooling liquid can fully and uniformly absorb heat. Meanwhile, the cooling liquid can absorb heat conducted by the splitter plate, and the heat absorption area is increased. In addition, the turbulent flow blocks fixed in the flow distribution plate further play a role, when the cooling liquid flows in the flow distribution grooves, the turbulent flow blocks block the cooling liquid, the flow speed is reduced again, and the cooling liquid is dispersed after impacting the turbulent flow blocks and makes full contact with heat, so that the heat is fully absorbed. The design greatly improves the cooling effect of the cooling plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile battery pack heat dissipation liquid cooling plate, in particular to a heat management liquid cooling plate for new energy automobile battery pack. BACKGROUND

[0002] At present, new energy automobile battery pack commonly used heat dissipation method is mainly liquid cooling. The structure of traditional liquid cooling heat dissipation liquid cooling plate is relatively simple, usually only a simple liquid cooling channel is set on the cover plate, when the cooling liquid flows in the channel, it is difficult to realize uniform distribution, leading to part of the area cooling liquid flow rate is too fast, and part of the area flow rate is too slow, so that the temperature distribution of each part of the battery pack is uneven, and local overheating phenomenon occurs from time to time. Moreover, the traditional liquid cooling plate only relies on the heat exchange between the cooling liquid and the battery pack to dissipate heat, and the heat dissipation mode is single. In the working condition of high power output or long time running of the battery pack, the heat dissipation effect is often difficult to meet the demand, and the safety and stability of the battery pack in high temperature environment cannot be effectively guaranteed.

[0003] On the one hand, high temperature can accelerate the rate of internal chemical reaction of the battery, leading to rapid attenuation of battery capacity and shortening of battery service life. For example, the capacity retention rate of the battery in long-term high temperature environment will be significantly lower than that of the battery in normal temperature, which will greatly reduce the cruising range of new energy automobile and affect the travel experience of users.

[0004] On the other hand, high temperature can also increase the risk of thermal runaway of the battery. When the internal heat of the battery accumulates to a certain extent, it may trigger a chain reaction inside the battery, leading to fire or even explosion of the battery, which seriously threatens the life safety of passengers and the property safety of vehicles. In recent years, new energy automobile safety accidents caused by battery thermal runaway have occurred from time to time, which has attracted widespread attention from all walks of life.

[0005] At present, new energy automobile battery pack commonly used heat dissipation method is mainly liquid cooling. The structure of traditional liquid cooling heat dissipation liquid cooling plate is relatively simple, usually only a simple liquid cooling channel is set on the cover plate, when the cooling liquid flows in the channel, it is difficult to realize uniform distribution, leading to part of the area cooling liquid flow rate is too fast, and part of the area flow rate is too slow, so that the temperature distribution of each part of the battery pack is uneven, and local overheating phenomenon occurs from time to time. Moreover, the traditional liquid cooling plate only relies on the heat exchange between the cooling liquid and the battery pack to dissipate heat, and the heat dissipation mode is single. In the working condition of high power output or long time running of the battery pack, the heat dissipation effect is often difficult to meet the demand, and the safety and stability of the battery pack in high temperature environment cannot be effectively guaranteed.

[0006] Therefore, it is of great practical significance to develop a heat management liquid cooling plate which can effectively solve the above problems, improve the heat dissipation effect and ensure the stable operation of the battery pack under various working conditions. SUMMARY

[0007] The purpose of the present application is to provide a heat management liquid cooling plate for new energy automobile battery pack, which can solve the problem that the heat dissipation effect is often difficult to meet the demand in the working condition of high power output or long time running of the battery pack in the prior art, and cannot effectively guarantee the safety and stability of the battery pack in high temperature environment.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a liquid cooling plate for thermal management of a battery pack for new energy vehicles, comprising an upper cover plate and a lower cover plate, wherein multiple liquid cooling grooves are provided on both the upper cover plate and the lower cover plate, multiple flow dividers are provided in the liquid cooling grooves of the upper cover plate, and multiple flow turbulence blocks are fixedly connected in the flow dividers on the upper cover plate.

[0009] A water inlet pipe is fixedly connected to the liquid cooling tank on the lower cover plate, and a water supply pipe is fixedly connected to one end of the water inlet pipe. A water outlet pipe is fixedly connected to the liquid cooling tank on the lower cover plate, and a drain pipe is fixedly connected to one end of the water outlet pipe. A transmission groove is provided in the liquid cooling tank, and an air-cooling mechanism is provided in the transmission groove. The air-cooling mechanism is used for air cooling during the liquid cooling process.

[0010] Furthermore, the air-cooling mechanism includes a drive shaft rotatably connected to the lower cover plate, a plurality of drive blades are fixedly connected to the outer surface of the drive shaft, a fan blade is fixedly connected to one end of the drive shaft, and a ventilation hole penetrating the lower cover plate is provided on the upper cover plate.

[0011] Furthermore, a suction pipe is fixedly connected to the lower cover plate, and multiple suction holes are opened on the outer surface of the suction pipe.

[0012] Furthermore, a protective frame is fixedly connected to the bottom of the lower cover plate, an exhaust pipe is fixedly connected to the protective frame, and an electromagnetic valve is installed on the exhaust pipe.

[0013] Furthermore, the bottom of the lower cover plate is fixedly connected to a support block that is fixedly connected to the protective frame.

[0014] Furthermore, a rubber sealing ring is fixedly connected to the top of the lower cover plate.

[0015] Furthermore, multiple connecting blocks are fixedly connected to both the upper and lower cover plates, and the connecting blocks are provided with connecting holes.

[0016] Furthermore, a plurality of fixing blocks are fixedly connected to the upper cover plate, and fixing holes are provided on the fixing blocks.

[0017] Compared with the prior art, the liquid cooling plate for thermal management of new energy vehicle battery packs provided by the present invention has the following beneficial effects:

[0018] The thermal management liquid cooling plate of this invention features an ingenious liquid cooling structure design that significantly improves cooling performance. Multiple flow dividers are installed within the liquid cooling tank of the upper cover plate, dividing the tank into multiple flow channels. This ensures uniform distribution of the coolant, effectively reducing flow velocity and allowing the coolant to fully and evenly absorb heat. Simultaneously, the coolant absorbs heat conducted by the flow dividers, increasing the heat absorption area. Furthermore, the baffles fixed within the flow dividers further enhance the cooling effect. As the coolant flows within the flow channels, the baffles obstruct its flow, further reducing the flow velocity and causing the coolant to disperse upon impact, ensuring full contact with heat and maximizing heat absorption. This design greatly improves the cooling plate's cooling efficiency, ensuring uniform temperature across the battery pack, preventing localized overheating, extending battery life, and guaranteeing stable operation of new energy vehicles under various operating conditions.

[0019] This invention innovatively integrates a cooling mechanism into the liquid cooling plate, forming a composite heat dissipation mode combining liquid and air cooling, which greatly enhances the heat dissipation effect. When the internal heat of the battery pack becomes too high, the pressure of the coolant supplied through the water supply pipe is increased, accelerating the flow rate of the coolant. This drives the transmission blades and transmission shaft in the transmission groove to rotate, which in turn causes the fan blades to rotate and draw in air. The fan blades blow air downwards through the suction pipe, drawing air in through the suction holes to the bottom of the lower cover plate. Simultaneously, the ventilation holes draw air into the battery pack, drawing heat into the area below the lower cover plate. At this point, the electromagnetic valve on the exhaust pipe is opened, and the hot air is discharged. This design accelerates liquid cooling while promptly dissipating heat from inside the battery pack, effectively coping with high-temperature environments, ensuring the safety and stability of the battery pack, and providing strong support for the reliable operation of new energy vehicles under complex operating conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a perspective view of the external structure of the present invention;

[0022] Figure 2 This is a perspective view of the external structure of the upper cover plate of the present invention;

[0023] Figure 3 This is a first perspective view of the internal structure of the lower cover plate of the present invention;

[0024] Figure 4 This is a second perspective view of the internal structure of the lower cover plate of the present invention;

[0025] Figure 5 This is a third perspective view of the internal structure of the lower cover plate of the present invention;

[0026] Figure 6 This is a perspective view of the internal structure of the present invention;

[0027] Figure 7 For the present invention Figure 2 Enlarged view of A in the middle;

[0028] Figure 8 For the present invention Figure 6 A magnified view of B in the middle.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Top cover plate; 2. Bottom cover plate; 3. Liquid cooling tank; 4. Diverter plate; 5. Baffle block; 6. Inlet pipe; 7. Supply pipe; 8. Outlet pipe; 9. Drain pipe; 10. Transmission groove; 11. Rubber sealing ring; 21. Transmission shaft; 22. Transmission blades; 23. Fan blades; 24. Ventilation hole; 25. Suction pipe; 26. Suction hole; 31. Protective frame; 32. Exhaust pipe; 33. Solenoid valve; 34. Support block; 41. Connecting block; 42. Connecting hole; 51. Fixing block; 52. Fixing hole. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] Please see Figures 1 to 8 As shown, the present invention provides a liquid cooling plate for thermal management of battery packs for new energy vehicles, including an upper cover plate 1 and a lower cover plate 2. Both the upper cover plate 1 and the lower cover plate 2 are provided with multiple liquid cooling grooves 3. Multiple flow dividers 4 are provided in the liquid cooling grooves 3 of the upper cover plate 1. Multiple flow diverters 5 are fixedly connected in the flow dividers 4 on the upper cover plate 1.

[0034] A water inlet pipe 6 is fixedly connected to the liquid cooling tank 3 on the lower cover plate 2. One end of the water inlet pipe 6 is fixedly connected to a water supply pipe 7. A water outlet pipe 8 is fixedly connected to the liquid cooling tank 3 on the lower cover plate 2. One end of the water outlet pipe 8 is fixedly connected to a drain pipe 9. A transmission groove 10 is provided in the liquid cooling tank 3. An air cooling mechanism is provided in the transmission groove 10. The air cooling mechanism is used for air cooling during the liquid cooling process. A rubber sealing ring 11 is fixedly connected to the top of the lower cover plate 2. The rubber sealing ring 11 has good sealing performance and can effectively prevent coolant leakage and ensure the stable operation of the liquid cooling system.

[0035] Multiple connecting blocks 41 are fixedly connected to both the upper cover plate 1 and the lower cover plate 2. The connecting blocks 41 are provided with connecting holes 42. These connecting blocks 41 and connecting holes 42 facilitate the assembly of the upper cover plate 1 and the lower cover plate 2. By passing bolts or other connecting parts through the connecting holes 42, the upper cover plate 1 and the lower cover plate 2 can be firmly connected together to form a complete liquid cooling plate structure.

[0036] Multiple fixing blocks 51 are fixedly connected to the upper cover plate 1. Fixing holes 52 are provided on the fixing blocks 51. The design of the fixing blocks 51 and fixing holes 52 allows the liquid cooling plate to be easily fixedly connected to other components such as the battery pack frame of the new energy vehicle, ensuring that the liquid cooling plate will not shake or shift during vehicle operation, thus ensuring its working stability.

[0037] Coolant is supplied to the water supply pipe 7 by the coolant supply machine, and then the coolant enters multiple water inlet pipes 6 through the water supply pipe 7. The water inlet pipes 6 then pass the coolant into the liquid cooling tank 3, and the liquid cooling tank 3 is divided by multiple flow dividers 4. The coolant is evenly distributed into multiple distribution channels formed by the distribution plate 4, which reduces the flow rate of the coolant and allows it to absorb heat evenly. The coolant can also absorb heat conducted by the distribution plate 4, further increasing the heat absorption area. As the coolant flows within the distribution channels, it is further reduced in flow rate by multiple baffles 5. The baffles 5 also cause the coolant to collide with the flow, spreading it out and allowing it to fully contact the heat source, thus maximizing heat absorption and improving the cooling effect of the cooling plate. The coolant then collects at the outlet pipe 8 in the liquid cooling tank 3, and subsequently flows through the outlet pipe 8 and drain pipe 9 into the liquid coolant supply mechanism for cooling and reuse.

[0038] Example 2

[0039] Based on Example 1, please refer to Figures 3 to 8 As shown, the air-cooling mechanism includes a drive shaft 21 that is rotatably connected to the lower cover plate 2. Multiple drive blades 22 are fixedly connected to the outer surface of the drive shaft 21. A fan blade 23 is fixedly connected to one end of the drive shaft 21. A ventilation hole 24 that penetrates the lower cover plate 2 is provided on the upper cover plate 1.

[0040] A suction pipe 25 is fixedly connected to the lower cover plate 2, and multiple suction holes 26 are opened on the outer surface of the suction pipe 25.

[0041] A protective frame 31 is fixedly connected to the bottom of the lower cover plate 2, and an exhaust pipe 32 is fixedly connected to the protective frame 31. An electromagnetic valve 33 is installed on the exhaust pipe 32.

[0042] The bottom of the lower cover plate 2 is fixedly connected to a support block 34 that is fixedly connected to the protective frame 31.

[0043] When the internal heat is too high, the pressure of the coolant supplied to the water supply pipe 7 is increased. The coolant then enters the liquid cooling tank 3 through the water inlet pipe 6, increasing the flow rate of the coolant. The coolant enters the transmission tank 10, causing the transmission blades 22 and transmission shaft 21 to rotate. The transmission shaft 21 drives the fan blades 23 to rotate, blowing air downwards. The fan blades 23 also blow air downwards through the suction pipe 25, allowing air to enter the bottom of the lower cover plate 2 through the suction holes 26. The system draws air in through the ventilation holes 24 on the lower cover plate 2 and the upper cover plate 1, drawing heat from inside the battery pack to below the lower cover plate 2. Simultaneously, the solenoid valve 33 on the exhaust pipe 32 is opened to allow hot air to be discharged through the exhaust pipe 32. This accelerates the liquid cooling of the battery pack while simultaneously dissipating heat from inside the battery pack in a timely manner using airflow, greatly improving the heat dissipation effect of the battery pack and effectively ensuring the safety and stability of the battery pack in high-temperature environments.

[0044] In summary, the liquid-cooled plate for thermal management of new energy vehicle battery packs provided by this invention represents a significant breakthrough in the field of thermal management for new energy vehicles. Its innovative design, combining liquid cooling and air cooling, fully leverages the advantages of both heat dissipation methods. The liquid cooling section, through the ingenious design of the flow divider and baffles, achieves uniform distribution of the coolant and sufficient heat absorption, greatly improving cooling efficiency. The air cooling mechanism intervenes promptly when the battery pack becomes excessively hot, rapidly expelling hot air from inside the battery pack through the coordinated work of components such as the drive shaft and fan blades, further enhancing the heat dissipation effect.

[0045] This comprehensive heat dissipation solution effectively addresses the heat generated by the battery pack in new energy vehicles under various operating conditions, ensuring that the battery pack remains within a suitable operating temperature range. Whether it's frequent start-stop cycles in congested urban traffic or continuous high-power output during high-speed driving, the liquid cooling plate stably dissipates heat, extending battery life and improving battery safety and reliability.

[0046] From a market application perspective, with the continuous expansion of the new energy vehicle market, the demand for efficient battery thermal management systems is also increasing. The thermal management liquid cooling plate of this invention, with its superior performance and innovative design, has broad market potential. It can not only improve the overall performance and competitiveness of new energy vehicles but also bring consumers a safer and more reliable driving experience. In promoting the sustainable development of the new energy vehicle industry, this liquid cooling plate will undoubtedly play an important role, possessing significant practical value and far-reaching social significance.

[0047] Working principle: Coolant is supplied to the water supply pipe 7 by the coolant supply machine. Then the coolant enters multiple water inlet pipes 6 through the water supply pipe 7. The water inlet pipes 6 then pass the coolant into the liquid cooling tank 3. The liquid cooling tank 3 is divided by multiple diversion plates 4. The coolant is evenly distributed into multiple distribution channels formed by the distribution plate 4, which reduces the flow rate of the coolant and allows it to absorb heat evenly. The coolant can also absorb heat conducted by the distribution plate 4, further increasing the heat absorption area. As the coolant flows within the distribution channels, it is further reduced in flow rate by multiple baffles 5. The baffles 5 also cause the coolant to collide with the flow, spreading it out and allowing it to fully contact the heat source, thus maximizing heat absorption and improving the cooling effect of the cooling plate. The coolant then collects at the outlet pipe 8 in the liquid cooling tank 3, and subsequently flows through the outlet pipe 8 and drain pipe 9 into the liquid coolant supply mechanism for cooling and reuse.

[0048] When the internal heat is too high, the pressure of the coolant supplied to the water supply pipe 7 is increased. Then, the water supply pipe 7 enters the liquid cooling tank 3 through the water inlet pipe 6. At this time, the flow rate of the coolant in the liquid cooling tank 3 increases, and the coolant enters the transmission tank 10, driving the transmission blades 22 and the transmission shaft 21 in the transmission tank 10 to rotate. The transmission shaft 21 drives the fan blades 23 to rotate, and the fan blades 23 rotate downward to blow air. At this time, the fan blades 23 blow air downward in the suction pipe 25, so that the suction pipe 25 draws air to the bottom of the lower cover plate 2 through the suction hole 26. At the same time, the ventilation holes 24 on the lower cover plate 2 and the upper cover plate 1 draw air to the inside of the battery pack at the top of the liquid cooling plate, drawing the heat inside the battery pack to the bottom of the lower cover plate 2. At the same time, by opening the solenoid valve 33 on the exhaust pipe 32, the hot air is discharged through the exhaust pipe 32. This achieves accelerated liquid cooling of the battery pack and timely discharge of the heat inside the battery pack through wind energy, greatly improving the heat dissipation effect of the battery pack.

[0049] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A liquid cooling plate for thermal management of battery packs in new energy vehicles, characterized in that, It includes an upper cover plate (1) and a lower cover plate (2). Both the upper cover plate (1) and the lower cover plate (2) are provided with multiple liquid cooling tanks (3). Multiple flow dividers (4) are provided in the liquid cooling tanks (3) of the upper cover plate (1). Multiple flow dividers (5) are fixedly connected in the flow dividers (4) on the upper cover plate (1). A water inlet pipe (6) is fixedly connected to the liquid cooling tank (3) on the lower cover plate (2). A water supply pipe (7) is fixedly connected to one end of the water inlet pipe (6). A water outlet pipe (8) is fixedly connected to the liquid cooling tank (3) on the lower cover plate (2). A drain pipe (9) is fixedly connected to one end of the water outlet pipe (8). A transmission groove (10) is provided in the liquid cooling tank (3). An air cooling mechanism is provided in the transmission groove (10). The air cooling mechanism is used for air cooling during the liquid cooling process.

2. The liquid cooling plate for thermal management of battery packs in new energy vehicles according to claim 1, characterized in that, The air-cooling mechanism includes a drive shaft (21) rotatably connected to the lower cover plate (2). Multiple drive blades (22) are fixedly connected to the outer surface of the drive shaft (21). A fan blade (23) is fixedly connected to one end of the drive shaft (21). A ventilation hole (24) penetrating the lower cover plate (2) is provided on the upper cover plate (1).

3. A liquid cooling plate for thermal management of a new energy vehicle battery pack according to claim 2, characterized in that, A suction pipe (25) is fixedly connected to the lower cover plate (2), and a plurality of suction holes (26) are opened on the outer surface of the suction pipe (25).

4. A liquid cooling plate for thermal management of a new energy vehicle battery pack according to claim 2, characterized in that, The bottom of the lower cover plate (2) is fixedly connected to a protective frame (31), and an exhaust pipe (32) is fixedly connected to the protective frame (31). An electromagnetic valve (33) is installed on the exhaust pipe (32).

5. A liquid cooling plate for thermal management of a new energy vehicle battery pack according to claim 4, characterized in that, The bottom of the lower cover plate (2) is fixedly connected to a support block (34) that is fixedly connected to the protective frame (31).

6. A liquid cooling plate for thermal management of a new energy vehicle battery pack according to claim 1, characterized in that, A rubber sealing ring (11) is fixedly connected to the top of the lower cover plate (2).

7. A liquid cooling plate for thermal management of a new energy vehicle battery pack according to claim 1, characterized in that, Multiple connecting blocks (41) are fixedly connected to both the upper cover plate (1) and the lower cover plate (2), and connecting holes (42) are provided on the connecting blocks (41).

8. A liquid cooling plate for thermal management of a new energy vehicle battery pack according to claim 1, characterized in that, Multiple fixing blocks (51) are fixedly connected to the upper cover plate (1), and fixing holes (52) are provided on the fixing blocks (51).

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