Battery thermal management water circulation system

Abstract

The utility model relates to the field of battery thermal management, and discloses a battery thermal management water circulation system. The battery thermal management water circulation system comprises a water segregator, a water collector, a heat exchanger and a unit water return pipe, a circulating pump is arranged between the water segregator and the water collector, one end of the heat exchanger is communicated with the water collector through a fluid pipeline, the other end of the heat exchanger is communicated with a unit water supply pipe, the unit water return pipe is communicated with the water segregator, and the circulating pump is arranged between the water segregator and the water collector. The water segregator, the water collector, the heat exchanger, the unit water supply pipes and the unit water supply pipes are connected through fluid pipelines to form a sealable liquid circulation channel, through the design of the water segregator, the temperature and pressure of a plurality of water outlets and water inlets in the water segregator are kept consistent, and control over the flow in the pipelines communicated with the water inlets and the water outlets is facilitated; the stability of flow in the liquid pipeline is maintained, and the stability of battery pack temperature regulation is improved.

Description

Technical Field

[0001] The utility model relates to the field of battery thermal management, in particular to a battery thermal management water circulation system. Background Art

[0002] With the development of new energy technology in my country, the technology integrating photovoltaic, energy storage, charging and discharging, and fast replacement of automotive power batteries has made continuous breakthroughs. During the charging and discharging process, the battery performance will be affected by excessively high or low temperatures, such as serious battery capacity attenuation and product life attenuation. Existing battery swap stations usually use a separate thermal management unit to adjust the battery temperature. The water circulation system in the thermal management system plays a direct role in regulating the battery temperature, and needs to respond promptly and quickly according to the changes in battery temperature.

[0003] At present, the water circulation system of the thermal management unit has many pipelines, the space is messy, the pipelines are complex, and the temperature adjustment rate is low, which brings many hidden dangers to the equipment. Utility Model Content

[0004] The utility model aims to provide a battery thermal management water circulation system, improve the operating efficiency of the water circulation system, and reduce equipment hidden dangers.

[0005] In order to solve the above technical problems, the implementation method of the utility model provides a technical solution as follows:

[0006] A battery thermal management water circulation system includes a water distributor and a water collector, a circulation pump is arranged between the water distributor and the water collector, and also includes a heat exchanger, one end of the heat exchanger is connected to the water collector through a fluid pipeline, and the other end is connected to a water supply pipe of a unit, and also includes a unit return pipe, the unit return pipe is connected to the water distributor, and the water distributor, the water collector, the heat exchanger, the unit water supply pipe, and the unit water supply pipe are connected by a fluid pipeline to form a sealable liquid circulation passage.

[0007] Furthermore, the water distributor includes a first drain port and a second drain port, the circulating pump includes a first circulating pump and a second circulating pump, the water collector includes a first return water port and a second return water port, a first circulating pump is provided between the first drain port and the first return water port, the first circulating pump is used to drain the liquid in the water distributor from the first drain port to the water collector, a second circulating pump is provided between the second drain port and the second return water port, the second circulating pump is used to drain the liquid in the water distributor from the second drain port to the water collector.

[0008] Furthermore, it comprises a heater, one end of which is connected to the water collector, and the other end of which is connected to the water supply pipe of the unit. The liquid in the water collector is heated by the heater and then flows into the water supply pipe of the unit.

[0009] Furthermore, it includes a water replenishing tank, which is arranged above the water distributor. A water inlet pipe is provided between the water replenishing tank and the water distributor. A third circulating pump is provided on the water inlet pipe. The third circulating pump is used to drain the liquid in the water distributor to the water replenishing tank.

[0010] Furthermore, a first water replenishment pipe is provided between the water replenishment tank and the water distributor, and the liquid in the water replenishment tank can flow into the water distributor through the first water replenishment pipe.

[0011] Furthermore, a second water replenishment pipe is provided between the water replenishment tank and the water supply pipe of the unit, and the liquid in the water replenishment tank can flow into the water supply pipe of the unit through the second water replenishment pipe.

[0012] Furthermore, it comprises a pressure stabilizing tank, which is connected with the water distributor through a pressure stabilizing tube and can inject compressed gas into the water distributor through the pressure stabilizing tube.

[0013] Furthermore, the water manifold is provided with a temperature sensor interface, to which a temperature sensor is connected, and the temperature sensor is used to monitor the internal temperature of the water manifold; the water manifold is provided with a pressure sensor interface, to which a pressure sensor is connected, and the pressure sensor is used to monitor the internal pressure of the water manifold.

[0014] Furthermore, the water separator is provided with an exhaust port, and the exhaust port is used to release the internal pressure of the water separator.

[0015] Furthermore, a water supply pressure sensor and a water supply temperature sensor are provided on the water supply pipe of the unit.

[0016] Compared with the prior art, the battery thermal management water circulation system of the utility model simplifies the water circulation line and improves the operation efficiency of the water circulation system through the design of the water distributor and the water collector; through the design of the water distributor, the temperature and pressure of multiple water outlets and water inlets in the water distributor are kept consistent, which is conducive to the control of the flow in the pipeline connected to the water inlet and the water outlet, maintains the stability of the flow in the liquid fluid pipeline, and increases the stability of the temperature regulation of the battery pack; through the temperature sensor and pressure sensor arranged on the water distributor, and the water supply temperature sensor and water supply pressure sensor arranged on the water supply pipe of the unit, the temperature and pressure in the water circulation system are monitored in real time, so that the control system adjusts the temperature and pressure in the water circulation system according to the temperature and pressure signals, so that the pressure and temperature in the water circulation system quickly match the preset values, improve the battery temperature response speed and regulation efficiency, improve the battery energy conversion efficiency, and extend the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 This is a three-dimensional structural diagram of the battery thermal management water circulation system of the utility model;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the battery thermal management water circulation system of the utility model at different angles;

[0020] Figure 3 This is a schematic diagram of the water collector structure of the battery thermal management water circulation system of the utility model;

[0021] Figure 4 This is a schematic diagram of the water distributor structure of the battery thermal management water circulation system of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the water distributor of the battery thermal management water circulation system of the utility model at different angles;

[0023] Figure 6 This is a block diagram of the battery thermal management water circulation system of the utility model.

[0024] Explanation of the reference numerals: 1. heat exchanger; 2. water collector; 21. first water return port; 22. second water return port; 23. first drain port; 24. second drain port; 3. water supply pipe of the unit; 4. heater; 5. first water return pipe; 51. first circulation pump; 6. second water return pipe; 61. second circulation pump; 7. water distributor; 71. first water outlet; 72. second water outlet; 73. water inlet; 74. filter screen interface; 75. liquid injection port; 76. third water outlet; 77. pressure sensor interface; 78. voltage regulator interface; 79. temperature sensor interface; 70. exhaust port; 8. voltage regulator tank; 81. voltage regulator tube; 9. water supply tank; 91. first water supply pipe; 92. water inlet pipe; 93. third circulation pump; 94. second water supply pipe; 10. water return pipe of the unit. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0026] like Figure 1-5 As shown, the battery thermal management water circulation system includes a water distributor 7 and a water collector 2, a circulation pump is provided between the water distributor 7 and the water collector 2, and also includes a heat exchanger 1, one end of the heat exchanger 1 is connected with the water collector 2 through a fluid pipeline, and the other end is connected with the unit water supply pipe 3, and also includes a unit return pipe 10, the unit return pipe 10 is connected with the water distributor 7, and the water distributor 7, the water collector 2, the heat exchanger 1, the unit water supply pipe 3, and the unit water supply pipe 3 are connected through a fluid pipeline to form a sealable liquid circulation passage.

[0027] The heat exchanger 1 is used to cool the liquid circulating in the fluid pipeline, and is also connected to the water collector 2 and includes a heater 4, which is used to heat the circulating liquid.

[0028] In one embodiment, the water distributor 7 includes a shell and a hollow cavity formed by the shell, and the cavity is used to accommodate fluid substances. The shell of the water distributor 7 is provided with multiple through holes, and the through holes include a water inlet 73 and multiple water outlets. It is also provided with a pressure stabilizing interface 78 for connecting to a pressure stabilizing tank 8, a pressure sensor interface 77 for connecting to a pressure sensor, a temperature sensor interface 79 for connecting to a temperature sensor interface 79, a liquid injection port 75 for connecting to an external liquid source, and a filter screen interface 74 for connecting to a return pipe 10 of the unit. Preferably, the cross-section of the shell is circular or elliptical.

[0029] The water distributor 7 is provided with a first water outlet 71 and a second water outlet 72, and the water collector 2 is provided with a first return water port 21 and a second return water port 22. A first circulation pump 51 is provided between the first water outlet 71 and the first return water port 21, and a second circulation pump 61 is provided between the second water outlet 72 and the second return water port 22. The outlet of the first circulation pump 51 is connected to the first return water port 21 through the first return water pipe 5, and the outlet of the second circulation pump 61 is connected to the first return water port 21 through the second return water pipe 6. Under the action of the circulation pump, the fluid in the water distributor 7 flows from the water distributor 7 to the water collector 2.

[0030] The water collector 2 is provided with a first drain port 23 and a second drain port 24, wherein the first drain port 23 is connected to the heat exchanger 1, and the second drain port 24 is connected to the heater 4. The fluid in the water collector 2 flows through the heat exchanger 1 through a pipeline to cool the fluid in the pipeline, and the low-temperature fluid dissipates heat to the battery through the unit water supply pipe 3; the fluid in the water collector 2 flows through the heater 4 through a pipeline to heat the fluid in the pipeline, and the heated fluid heats the battery through the unit water supply pipe 3.

[0031] In one embodiment, a water replenishment tank 9 is further provided, and the water replenishment tank 9 is arranged above the water distributor 7. The water replenishment tank 9 is connected to the water distributor 7 below through a first water replenishment pipe 91. A valve is provided at one end of the first water replenishment pipe 91. When the valve is opened, the liquid in the water replenishment tank 9 enters the water distributor 7 to adjust the liquid volume in the water distributor 7. A second water replenishment pipe 94 is provided between the water replenishment tank 9 and the water supply pipe 3 of the unit. The liquid in the water replenishment tank 9 can flow into the water supply pipe 3 of the unit through the second water replenishment pipe 94. Preferably, the second water replenishment pipe 9 4 is connected with a valve. When the valve is opened, the liquid in the water supply tank 9 flows into the water supply pipe 3 of the unit through the second water supply pipe 94. When the valve is closed, the second water supply pipe 94 is sealed. A water inlet pipe 92 is provided between the water supply tank 9 and the water distributor 7. One end of the water inlet pipe 92 is sealedly connected to the third water outlet 76 of the water distributor 7, and the other end is connected to the water supply tank 9. A third circulating pump 93 is also provided on the water inlet pipe 92. Under the action of the third circulating pump 93, the liquid in the water distributor 7 can flow from the third water outlet 76 to the water supply tank 9 through the water inlet pipe 92. Preferably, the first water supply pipe 91 and the second water supply pipe 94 are respectively connected to the upper end of the water supply tank 9, for example, through the top wall of the water supply tank 9, and the water inlet pipe 92 is connected to the lower end of the water supply tank 9, for example, through the bottom wall of the water supply tank 9, and the water inlet pipe 92 is sealedly connected to the third water outlet 76 through a clamp.

[0032] A liquid injection port 75 is provided on the side end surface of the water distributor 7 , and the liquid injection port 75 is connected to an external liquid source. The external liquid source can inject liquid into the water distributor 7 through the liquid injection port 75 to replenish the liquid in the water distributor 7 .

[0033] In one embodiment, a pressure stabilizing tank 8 is further provided, and the pressure stabilizing tank 8 is connected to the water distributor 7 through a pressure stabilizing tube 81, and one end of the pressure stabilizing tube 81 is sealed and connected to the pressure stabilizing interface 78 of the water distributor 7. Preferably, the pressure stabilizing tube 81 is sealed and connected to the pressure stabilizing interface 78 through a clamp. The pressure in the water distributor 7 is adjusted by the pressure stabilizing tube 81, so that the pressure in the water distributor 7 is maintained within a preset value range. For example, when the internal pressure of the water distributor 7 is less than the preset value, the pressure stabilizing tank 8 injects compressed gas into the water distributor 7 through the pressure stabilizing tube 81 to increase the pressure inside the water distributor 7. A pressure sensor interface 77 is provided adjacent to the pressure stabilizing interface 78, and the pressure sensor interface 77 is connected with a pressure sensor, and the pressure sensor monitors the pressure in the water distributor 7 in real time and uploads the monitoring signal to the control system; a temperature sensor interface 79 is provided at the upper end of the water distributor 7, and the temperature sensor interface 79 is connected with a temperature sensor, and the temperature sensor is used to monitor the internal temperature of the water distributor, and uploads the monitoring signal to the control system.

[0034] In one embodiment, an exhaust port 70 is provided at the upper end of the water separator 7, and an exhaust valve is provided at the exhaust port 70. When the pressure in the water separator 7 is higher than a preset value, the exhaust valve is opened to release the pressure.

[0035] In one embodiment, the water separator 7 is provided with a filter interface 74, the unit water return pipe 10 is connected to the water separator 7 through the filter interface 74, and a filter is provided in the filter interface 74. The filter can filter the particulate impurities in the liquid in the unit water return pipe 10, purify the liquid, and reduce the damage of the deposition of impurity particles to the battery thermal management water circulation system.

[0036] The water separator 7 transmits the temperature signal and the pressure signal in the water separator 7 to the control system via the temperature sensor and the pressure sensor arranged on the shell. The control system controls the pressure-stabilizing tank 8 to inject pressurized gas into the water separator 7 to increase the pressure in the cavity of the water separator 7 according to the pressure signal. The control system controls the exhaust valve connected to the exhaust port 70 to release the gas and relieve the pressure according to the pressure signal.

[0037] The battery thermal management water circulation system of the utility model regulates the temperature of the battery by the circulation of liquid in the liquid circulation passage. When the battery pack needs to be cooled, the liquid in the water collector 2 is cooled by the heat exchanger 1, and the cooled liquid flows to the battery pack through the unit water supply pipe 3 to cool the battery pack. When the battery pack needs to be heated, the liquid in the water collector 2 is heated by the heater 4, and the heated liquid flows to the battery pack through the unit water supply pipe 3 to heat the battery pack. Preferably, a pressure relief valve, a water supply pressure sensor, a water supply temperature sensor and a water supply pipe drain valve are provided on the water supply pipe 3 of the unit. The pressure relief valve is used to release the pressure in the water supply pipe of the unit. The water supply pipe drain valve is used to discharge the liquid in the water supply pipe of the unit and adjust the liquid volume in the water supply pipe of the unit. The water supply pressure sensor is used to collect the pressure signal in the water supply pipe 3 of the unit and transmit it to the control system. The water supply temperature sensor is used to collect the temperature in the water supply pipe 3 of the unit and transmit it to the control system to adjust the pressure and temperature in the water supply pipe 3 of the unit. The water supply pipe drain valve is used to discharge the liquid in the water supply pipe of the unit and more efficiently adjust the temperature of the battery pack. The return water of the unit circulates to the water distributor 7 through the return water pipe 10 of the unit.

[0038] The battery thermal management water circulation system of the utility model simplifies the water circulation line and improves the operation efficiency of the water circulation system through the design of the water distributor and the water collector; the temperature and pressure of multiple water outlets and water inlets in the water distributor are kept consistent, which is conducive to the control of the flow in the pipeline connected to the water inlet and the water outlet, maintains the stability of the flow in the liquid fluid pipeline, and increases the stability of the temperature regulation of the battery pack; the temperature and pressure in the water circulation system are monitored in real time by the temperature sensor and pressure sensor arranged on the water distributor, and the water supply temperature sensor and water supply pressure sensor arranged on the water supply pipe of the unit, so that the control system adjusts the temperature and pressure in the water circulation system according to the temperature and pressure signals, so that the pressure and temperature in the water circulation system quickly match the preset values, thereby improving the battery temperature response speed and regulation efficiency, improving the battery energy conversion efficiency, and extending the battery life.

[0039] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A battery thermal management water circulation system, characterized in that: The invention comprises a water distributor (7) and a water collector (2), wherein a circulation pump is provided between the water distributor (7) and the water collector (2), and further comprises a heat exchanger (1), wherein one end of the heat exchanger (1) is connected to the water collector (2) via a fluid pipeline, and the other end is connected to a water supply pipe (3) of the unit, and further comprises a water return pipe (10) of the unit, wherein the water return pipe (10) of the unit is connected to the water distributor (7), and the water distributor (7), the water collector (2), the heat exchanger (1), the water supply pipe (3) of the unit, and the water supply pipe (3) of the unit are connected via a fluid pipeline to form a sealable liquid circulation passage.

2. The battery thermal management water circulation system according to claim 1, characterized in that: The water distributor (7) comprises a first drain port (23) and a second drain port (24); the circulating pump comprises a first circulating pump (51) and a second circulating pump (61); the water collector (2) comprises a first return port (21) and a second return port (22); a first circulating pump (51) is provided between the first drain port (23) and the first return port (21); the first circulating pump (51) is used to drain the liquid in the water distributor (7) from the first drain port (23) to the water collector (2); a second circulating pump (61) is provided between the second drain port (24) and the second return port (22); the second circulating pump (61) is used to drain the liquid in the water distributor (7) from the second drain port (24) to the water collector (2).

3. The battery thermal management water circulation system according to claim 1, characterized in that: It comprises a heater (4), one end of which is connected to the water collector (2) and the other end of which is connected to the water supply pipe (3) of the unit; the liquid in the water collector (2) is heated by the heater (4) and then flows into the water supply pipe (3) of the unit.

4. The battery thermal management water circulation system according to claim 1, characterized in that: The invention comprises a water replenishing tank (9), wherein the water replenishing tank (9) is arranged above the water distributor (7), a water inlet pipe (92) is arranged between the water replenishing tank (9) and the water distributor (7), a third circulation pump (93) is arranged on the water inlet pipe (92), and the third circulation pump (93) is used to drain the liquid in the water distributor (7) to the water replenishing tank (9).

5. The battery thermal management water circulation system according to claim 4, characterized in that: A first water replenishment pipe (91) is provided between the water replenishment tank (9) and the water distributor (7), and the liquid in the water replenishment tank (9) can flow into the water distributor (7) through the first water replenishment pipe (91).

6. The battery thermal management water circulation system according to claim 5, characterized in that: A second water replenishment pipe (94) is provided between the water replenishment tank (9) and the water supply pipe (3) of the unit, and the liquid in the water replenishment tank (9) can flow into the water supply pipe (3) of the unit through the second water replenishment pipe (94).

7. The battery thermal management water circulation system according to claim 1, characterized in that: It comprises a pressure stabilizing tank (8), wherein the pressure stabilizing tank (8) is connected to the water distributor (7) via a pressure stabilizing tube (81), and compressed gas can be injected into the water distributor (7) via the pressure stabilizing tube (81).

8. The battery thermal management water circulation system according to claim 1, characterized in that: The water distributor (7) is provided with a temperature sensor interface (79), the temperature sensor interface (79) is connected to a temperature sensor, and the temperature sensor is used to monitor the internal temperature of the water distributor (7); the water distributor (7) is provided with a pressure sensor interface (77), the pressure sensor interface (77) is connected to a pressure sensor, and the pressure sensor is used to monitor the internal pressure of the water distributor (7).

9. The battery thermal management water circulation system according to claim 1, characterized in that: The water separator (7) is provided with an exhaust port (70), and the exhaust port (70) is used to release the internal pressure of the water separator (7).

10. The battery thermal management water circulation system according to claim 1, characterized in that: The water supply pipe (3) of the unit is provided with a water supply pressure sensor and a water supply temperature sensor.

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