Battery pack water cooling unit

Abstract

A battery pack water cooling unit comprises a box body, a water pump, a compressor, a condenser and a heat exchanger, the water pump, the compressor, the condenser and the heat exchanger are arranged in the box body, the compressor, the condenser and the heat exchanger are connected through a refrigeration pipeline, and the heat exchanger and the water pump are connected through a heat exchange pipeline; a water inlet, a water outlet and a water injection port are formed in the side face of the box body, the water inlet is connected with the heat exchanger through a first pipeline, the water outlet is connected with the water pump through a second pipeline, and the water injection port is connected with the heat exchanger through a pipeline. An exhaust port is further formed in the side face of the box body, and the exhaust port is connected with the first pipeline through a pipeline in the box body. The water injection and exhaust functions are integrated in the box body, so that the connection with the battery pack is simpler, better injection operation is facilitated, and the complexity of a waterway system is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, and in particular to a battery pack water cooling unit. Background Art

[0002] With the development of battery technology, the demand for battery water cooling is increasing. Currently, vehicles equipped with top-mounted, skirt-mounted or split battery thermal management systems need to replenish antifreeze during actual use. The existing technology does not have a separate replenishment circuit. For example, the invention patent with application number 201510975474.2 discloses a water-cooled unit with an inlet and an outlet for the entry and exit of refrigerant. During the replenishment process, a three-way valve needs to be set on the water inlet pipe to connect the water replenishment pipe for replenishment. At the same time, a vacuum filling machine is added in the existing technology to add antifreeze. However, the corresponding equipment cost will increase for small and medium-sized and special equipment. In addition, the existing technology requires a separate design of the water channel emptying system between the battery pack and the water-cooled unit, which has a complex structure and is inconvenient to install and maintain. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a battery pack water cooling unit, which reduces the connection of the external water system, reduces the complexity of the water system, and is easy to use; at the same time, the water cooling unit is integrated with degassing and filling pipes, which is convenient for users to add antifreeze and improve the exhaust function, reduce the air content of the water system, and extend the battery life.

[0004] Specifically, a battery pack water cooling unit includes: a box body, a water pump, a compressor, a condenser, and a heat exchanger arranged in the box body, wherein the compressor, condenser, and heat exchanger are connected via a refrigeration pipe, and the heat exchanger and the water pump are connected via a heat exchange pipe;

[0005] The side of the box body is provided with a water inlet, a water outlet and a water injection port, the water inlet is connected to the heat exchanger through a pipe 1, the water outlet is connected to the water pump through a pipe 2, and the water injection port is connected to the heat exchanger through a pipe;

[0006] An exhaust port is also provided on the side of the box body, and the exhaust port is connected to pipe 1 through a pipe inside the box body.

[0007] The benefit of adopting the above technical solution is that the present application integrates the water filling and exhaust functions in the box, making the connection with the battery pack simpler, facilitating better filling operations, reducing the complexity of the water system, and facilitating installation and maintenance.

[0008] Furthermore, the water inlet and the water outlet are connected to a water inlet cooling pipe and a water outlet cooling pipe, and the water inlet cooling pipe and the water outlet cooling pipe are connected to the battery pack for cooling the battery pack.

[0009] The benefit of adopting the above technical solution is that after the antifreeze is cooled by heat exchange in the heat exchanger, it flows through the battery pack through the water outlet cooling pipe to cool the battery, and then the antifreeze returns to the heat exchanger through the water inlet cooling pipe to continue heat exchange, continuously circulating and cooling, with a good cooling effect.

[0010] Furthermore, the water inlet is connected to an expansion water tank via a water supply pipe, and the expansion water tank is connected to an overflow pipe.

[0011] The benefit of adopting the above technical solution is that it reduces the water pressure fluctuation caused by the expansion of water in the system, improves the safety and reliability of the system operation, and at the same time, excess water can be discharged from the overflow pipe to avoid damage to the expansion tank.

[0012] Furthermore, the lower end of the outlet cooling pipe is connected to a drain pipe, and a drain valve is provided at the end of the drain pipe.

[0013] The benefit of adopting the above technical solution is that after running for a period of time, when the internal antifreeze liquid needs to be replaced, it is only necessary to open the drain valve to drain the internal liquid and then add new antifreeze liquid.

[0014] Furthermore, a PCT heater is provided on the water outlet cooling pipe.

[0015] The benefit of adopting the above technical solution is that the PCT heater can heat the antifreeze liquid to meet the use needs in cold areas or in winter.

[0016] Furthermore, a condensing fan is provided on the side of the condenser.

[0017] The benefit of adopting the above technical solution is that the condensing fan can accelerate the cooling of the refrigerant, and then the cooled refrigerant is cooled in the heat exchanger and the antifreeze liquid.

[0018] Furthermore, a controller is provided in the box, a controller housing is provided in the controller, and a heat sink is provided in the controller housing.

[0019] Furthermore, a plurality of ventilation holes are provided on both sides of the box body.

[0020] The benefit of adopting the above technical solution is that the provision of the heat sink and the vent holes both play a heat dissipation function, preventing the entire device from overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0022] Figure 1 This is a schematic diagram of the structure of the battery pack water cooling unit of the utility model

[0023] Figure 2 This is a top view of the battery pack water cooling unit of the utility model

[0024] Figure 3 This is a schematic diagram of the connection between pipeline 1 and pipeline 2 of the utility model

[0025] Figure 4 This is a schematic diagram of the water connection between the box and the battery pack of this utility model

[0026] The reference numerals in the accompanying drawings are as follows:

[0027] Box body 1; water inlet 11; water outlet 12; water filling port 13; pipe 1 14; pipe 2 15; exhaust port 16; controller 17; water pump 2; compressor 3; condenser 4; condensing fan 41; heat exchanger 5; water inlet cooling pipe 6; expansion tank 61; overflow pipe 62; water outlet cooling pipe 7; drain pipe 71; drain valve 72; PCT heater 73; battery pack 8; water supply pipe 9. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-4 As shown, a battery pack water cooling unit includes: a box body 1, a water pump 2, a compressor 3, a condenser 4 and a heat exchanger 5 arranged in the box body 1, the compressor 3, the condenser 4 and the heat exchanger 5 are connected by a refrigeration pipe, and the heat exchanger 5 and the water pump 2 are connected by a heat exchange pipe;

[0030] The side of the box body 1 is provided with a water inlet 11, a water outlet 12 and a water injection port 13. The water inlet 11 is connected to the heat exchanger 5 through a pipe 14, the water outlet 12 is connected to the water pump 2 through a pipe 2 15, and the water injection port 13 is connected to the heat exchanger 5 through a pipe.

[0031] The side of the box body 1 is also provided with an exhaust port 16, and the exhaust port 16 is connected to the pipe 1 14 through a pipe inside the box body 1.

[0032] The benefit of adopting the above technical solution is that the present application integrates the water filling and exhaust functions in the box 1, making the connection with the battery pack 8 simpler, facilitating better filling operations, and reducing the complexity of the water system. The pipeline runs smoothly, the pipeline is not flattened or blocked, and too many bends are avoided.

[0033] In some embodiments, the water inlet 11 and the water outlet 12 are connected to the water inlet cooling pipe 6 and the water outlet cooling pipe 7, and the water inlet cooling pipe 6 and the water outlet cooling pipe 7 are connected to the battery pack 8 for cooling the battery pack 8. The battery pack group is composed of multiple battery packs 8, and the water outlet cooling pipe 7 has multiple branches, which connect the battery packs 8 in series or in parallel. After cooling, the battery pack flows out through the water inlet cooling pipe 6 and enters the heat exchanger 5 from the water inlet 11 for heat exchange. After heat exchange, the battery pack flows out from the water outlet 12, and the circulating flow continues to cool down and exchange heat. The water pump 2 provides power for the flow of antifreeze, continuously circulates and cools down, and ensures the cooling effect.

[0034] In some embodiments, the water inlet 13 is connected to an expansion water tank via a water supply pipe 9 , and the expansion water tank 61 is connected to an overflow pipe 62 .

[0035] The benefit of adopting the above technical solution is that it reduces the water pressure fluctuation caused by the expansion of water in the system, improves the safety and reliability of the system operation, and at the same time, excess water can be discharged from the overflow pipe 62 to avoid damage to the expansion water tank 61 and avoid excessive internal pressure.

[0036] In some embodiments, the lower end of the outlet cooling pipe 7 is connected to a drain pipe 71, and a drain valve 72 is provided at the end of the drain pipe 71. After running for a period of time, when the internal antifreeze needs to be replaced, it is only necessary to open the drain valve 72 to discharge the internal antifreeze and add new antifreeze.

[0037] Furthermore, a PCT heater 73 is provided on the outlet cooling pipe 7 .

[0038] The benefit of adopting the above technical solution is that the PCT heater 73 can heat the cooling water to heat the battery pack 8 to meet the usage needs in cold areas or in winter.

[0039] In some embodiments, a condensing fan 41 is provided on the side of the condenser 4, and the condensing fan 41 is provided on the box body 1 and arranged side by side.

[0040] The benefit of adopting the above technical solution is that the condensing fan 41 can accelerate the cooling of the refrigerant, and then the cooled refrigerant is cooled in the heat exchanger 5 and the antifreeze liquid.

[0041] Furthermore, a controller 17 is provided in the box 1, a controller housing is provided in the controller 17, and a heat sink is provided in the controller housing. The heat sink dissipates heat for the controller 17 to prevent the controller 17 from overheating and damaging the internal circuit.

[0042] Furthermore, a plurality of ventilation holes are provided on both sides of the box body 1, and the provision of the ventilation holes plays the function of ventilation and heat dissipation to prevent the entire device from overheating.

[0043] During use, the internal refrigerant circulates through compressor 3, heat exchanger 5, and condenser 4. Inside heat exchanger 5, the refrigerant exchanges heat with antifreeze. After cooling, it enters battery pack 8 through water outlet 12 for cooling. The cooled water then flows through water inlet 11 and pump 2 into heat exchanger 5 for heat exchange, continuing the cycle. When refilling is needed, it is replenished through water inlet 13. An exhaust pipe is also provided for exhaust. This reduces the number of external water system connections, reduces the complexity of the water system, and facilitates use. The water-cooling unit also integrates a degassing and water inlet 13, making it easier for users to add antifreeze and improve exhaust performance, reducing air content in the water system and extending battery life.

[0044] For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A battery pack water cooling unit, characterized in that: include: A box (1), a water pump (2), a compressor (3), a condenser (4) and a heat exchanger (5) arranged in the box (1), wherein the compressor (3), the condenser (4) and the heat exchanger (5) are connected via a refrigeration pipe, and the heat exchanger (5) and the water pump (2) are connected via a heat exchange pipe; The side of the box body (1) is provided with a water inlet (11), a water outlet (12) and a water injection port (13); the water inlet (11) and the heat exchanger (5) are connected via a first pipe (14); the water outlet (12) and the water pump (2) are connected via a second pipe (15); and the water injection port (13) is connected to the heat exchanger (5) via a pipe; An exhaust port (16) is also provided on the side of the box body (1), and the exhaust port (16) is connected to the pipe 1 (14) through a pipe inside the box body (1).

2. The battery pack water cooling unit according to claim 1, characterized in that: The water inlet (11) and the water outlet (12) are connected to a water inlet cooling pipe (6) and a water outlet cooling pipe (7), and the water inlet cooling pipe (6) and the water outlet cooling pipe (7) are connected to the battery pack (8) for cooling the battery pack (8).

3. The battery pack water cooling unit according to claim 1, characterized in that: The water inlet (13) is connected to an expansion water tank via a water supply pipe (9), and the expansion water tank (61) is connected to an overflow pipe (62).

4. The battery pack water cooling unit according to claim 2, characterized in that: The lower end of the water outlet cooling pipe (7) is connected to a drain pipe (71), and a drain valve (72) is provided at the end of the drain pipe (71).

5. The battery pack water cooling unit according to claim 2, characterized in that: The water outlet cooling pipe (7) is provided with a PCT heater (73).

6. The battery pack water cooling unit according to claim 1, characterized in that: A condensing fan (41) is provided on the side of the condenser (4).

7. The battery pack water cooling unit according to claim 1, characterized in that: A controller (17) is also provided in the box (1), a controller housing is provided in the controller (17), and a heat sink is provided in the controller housing.

8. The battery pack water cooling unit according to claim 1, characterized in that: A plurality of ventilation holes are provided on both sides of the box body (1).

Images