Liquid cooling and fire fighting combined heat management device and system

Abstract

The utility model discloses a liquid cooling and fire fighting combined heat management device and system, which are used for carrying out heat management on a battery in a battery cabin box body, and the device comprises a water chilling unit, an electric three-way valve and a fire extinguishing agent storage tank, a water outlet of the water chilling unit is connected with a first inlet of the electric three-way valve through a pipeline, a second inlet of the electric three-way valve is connected with a liquid outlet of the fire extinguishing agent storage tank through a pipeline, and an output port of the electric three-way valve is connected with a battery compartment runner water inlet of the battery compartment box through a pipeline. A water return port of the water chilling unit is connected with a battery compartment runner water outlet of the battery compartment box body through a pipeline, and a controlled end of the water chilling unit is connected with an external controller so as to be controlled by the controller to output cold water or hot water; the controlled end of the electric three-way valve is connected with the controller so as to be controlled by the controller to communicate the first inlet or the second inlet with the output port. According to the technical scheme disclosed by the utility model, the capability of carrying out thermal management on the batteries in the battery cabin body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage cabinet fire protection, and in particular to a liquid cooling and fire protection combined thermal management device and system. Background Art

[0002] At present, energy issues have received close attention from the international community, and energy storage technology based on "battery + power electronics technology" has developed rapidly. Energy storage technology has largely solved the problems of randomness and volatility of renewable energy generation, and has played a role of "filling the peak with the valley". The performance of energy storage depends largely on the performance of the battery. Energy storage batteries use electrochemical principles for charging and discharging operations. The battery spontaneously undergoes chemical reactions such as oxidation and reduction to directly convert chemical energy into electrical energy, and heat is generated during this chemical reaction process. The optimal operating temperature of common batteries is between 25℃ and 35℃. Batteries are greatly affected by temperature. Batteries will have safety hazards at too high or too low temperatures. For example, too high temperature will cause thermal runaway of the battery, and too low temperature will cause damage to the internal structure of the battery or decrease in battery performance, which will affect the number of battery charge and discharge cycles and reduce the battery's service life. At the same time, too high temperature will also cause fires, causing safety problems. Therefore, thermal management of batteries in the energy storage industry is particularly important.

[0003] The most widely used thermal management method in the current energy storage industry is liquid cooling thermal management, in which the battery module and the ethylene glycol aqueous solution in the liquid cooling plate perform heat exchange to heat or cool the battery module. However, this thermal management method cannot perform emergency cooling and fire extinguishing on battery modules that have thermal runaway, and cannot prevent the spread of thermal runaway, resulting in too low an ability to thermally manage the batteries in the battery compartment. Utility Model Content

[0004] In view of this, the utility model provides a liquid cooling and fire protection combined thermal management device and system, the main purpose of which is to solve the technical problem of low ability to perform thermal management on batteries in the battery compartment.

[0005] To achieve the above-mentioned purpose, the utility model provides a liquid cooling and fire fighting combined thermal management device for thermal management of batteries in a battery compartment box, the device comprising a chiller, an electric three-way valve, and a fire extinguishing agent storage tank for storing liquid fire extinguishing agent;

[0006] The water outlet of the chiller is connected to the first inlet of the electric three-way valve through a pipeline, the second inlet of the electric three-way valve is connected to the liquid outlet of the fire extinguishing agent storage tank through a pipeline, and the output port of the electric three-way valve is connected to the water inlet of the battery compartment flow channel of the battery compartment box through a pipeline;

[0007] The water return port of the chiller is connected to the water outlet of the battery compartment flow channel of the battery compartment box through a pipeline, and the controlled end of the chiller is connected to an external controller to accept the control of the controller to output cold water or hot water;

[0008] The controlled end of the electric three-way valve is connected to the controller to connect the first inlet or the second inlet with the output port under the control of the controller.

[0009] In one embodiment of the utility model, optionally, the device also includes a battery compartment case body drain electric valve; the battery compartment case body drain electric valve is arranged on the outer shell of the battery compartment case body, and the controlled end of the battery compartment case body drain electric valve is connected to the controller to accept the control of the controller to open or close; when the battery compartment case body drain electric valve is opened, the liquid in the battery compartment case body can flow out of the battery compartment case body through the battery compartment case body drain electric valve.

[0010] In one embodiment of the utility model, optionally, the device also includes an electric three-way valve for liquid inlet in the battery compartment case; the liquid inlet of the electric three-way valve for liquid inlet in the battery compartment case is connected to the output port of the electric three-way valve through a pipeline, the first liquid outlet of the electric three-way valve for liquid inlet in the battery compartment case is connected to the water inlet of the battery compartment flow channel of the battery compartment case through a pipeline, and the second liquid outlet of the electric three-way valve for liquid inlet in the battery compartment case is connected to the liquid inlet in the battery compartment case of the battery compartment case through a pipeline; the controlled end of the electric three-way valve for liquid inlet in the battery compartment case is connected to the controller to accept the control of the controller to connect the first liquid outlet or the second liquid outlet with the liquid inlet.

[0011] In one embodiment of the utility model, optionally, the device also includes a circulating water pump; the circulating water pump is arranged in the pipeline between the output port of the electric three-way valve and the water inlet of the battery compartment flow channel, and is used to pump the liquid flowing through the output port of the electric three-way valve into the battery compartment box.

[0012] In one embodiment of the utility model, optionally, the controlled end of the circulating water pump is connected to the controller to be controlled by the controller to be in a running state or a stopped state.

[0013] In one embodiment of the utility model, optionally, the device also includes a first temperature sensor and a second temperature sensor; the first temperature sensor is arranged in the pipeline at the return water outlet of the chiller to collect the return water temperature value of the chiller, and the signal output end of the first temperature sensor is connected to the controller to send the return water temperature value of the chiller to the controller; the second temperature sensor is arranged in the pipeline at the water outlet of the chiller to collect the outlet water temperature value of the chiller, and the signal output end of the second temperature sensor is connected to the controller to send the outlet water temperature value of the chiller to the controller, so that the controller performs thermal management on the battery in the battery compartment box based on the return water temperature value and the outlet water temperature value.

[0014] In one embodiment of the utility model, optionally, the device also includes a first pressure sensor and a second pressure sensor; the first pressure sensor is arranged in the pipeline at the return water outlet of the chiller to collect the return water pressure value of the chiller, and the signal output end of the first pressure sensor is connected to the controller to send the return water pressure value of the chiller to the controller; the second pressure sensor is arranged in the pipeline at the water outlet of the chiller to collect the outlet water pressure value of the chiller, and the signal output end of the second pressure sensor is connected to the controller to send the outlet water pressure value of the chiller to the controller, so that the controller performs thermal management on the battery in the battery compartment box based on the return water temperature value, the outlet water temperature value, the return water pressure value and the outlet water pressure value.

[0015] In addition, to achieve the above-mentioned purpose, the utility model also proposes a liquid cooling and fire fighting combined thermal management system, including the liquid cooling and fire fighting combined thermal management device and a controller as described above in the claim.

[0016] In one embodiment of the present invention, optionally, the system further comprises an alarm, and a controlled end of the alarm is connected to the controller to accept control of the controller and issue an alarm message.

[0017] In one embodiment of the present invention, optionally, the alarm is a buzzer or an alarm light.

[0018] The utility model provides a liquid cooling and fire fighting combined thermal management device and system. When conventional cooling or heating is performed on the battery in the battery compartment box, the first inlet of the electric three-way valve can be connected to the output port of the electric three-way valve, and the liquid medium output by the chiller through the water outlet is input into the battery compartment box. Specifically, when the temperature of the battery in the battery compartment box is too low, the chiller can be controlled by an external controller to perform a thermal cycle, output heated water to the battery compartment box, so as to increase the temperature of the battery in the battery compartment box; when the temperature of the battery in the battery compartment box is too high, the chiller can be controlled by the controller to perform a cold cycle, output refrigerated water to the battery compartment box, so as to reduce the temperature of the battery in the battery compartment box. Further, when it is determined that the battery in the battery compartment box has or is about to have a thermal runaway, the second inlet of the electric three-way valve can be connected to the output port of the electric three-way valve, so that the fire extinguishing agent in the fire extinguishing agent storage tank can be input into the battery compartment box through the electric three-way valve, so as to perform emergency cooling and fire extinguishing treatment on the battery, so as to avoid the spread of thermal runaway of the battery. The technical solution disclosed by the utility model can perform conventional cooling or heating of the batteries in the battery compartment box, and can also perform emergency cooling and fire extinguishing treatment on the batteries when thermal runaway occurs or is about to occur, which significantly improves the thermal management capability of the batteries in the battery compartment.

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 One of the structural schematic diagrams of a liquid cooling and fire fighting combined thermal management device provided by an embodiment of the utility model is shown;

[0022] Figure 2 The second structural schematic diagram of a liquid cooling and fire fighting combined thermal management device provided by an embodiment of the utility model is shown;

[0023] Figure 3 A third structural schematic diagram of a liquid cooling and fire protection combined thermal management device provided in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0025] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0026] Combine the following Figures 1 to 3 The invention describes a liquid cooling and fire protection combined thermal management device and system according to some embodiments of the invention.

[0027] like Figure 1 As shown, an embodiment of the utility model proposes a liquid cooling and fire protection combined thermal management device for thermal management of batteries in a battery compartment box. Here, the battery compartment box can be an energy storage cabinet such as an energy storage battery compartment in which a battery module is arranged.

[0028] In the above embodiment, the liquid cooling and fire fighting combined thermal management device includes a water chiller 100, an electric three-way valve 200, and a fire extinguishing agent storage tank 300 for storing liquid fire extinguishing agent. Here, the water chiller 100 can be a device for cooling or heating, and can output a liquid medium capable of heating and cooling, such as water or ethylene glycol aqueous solution. Furthermore, the liquid fire extinguishing agent can be perfluorohexanone, which has excellent insulation properties, a dielectric strength of up to 110KV, and no residue after extinguishing the fire, and is not corrosive to the circuit. It is the best fire extinguishing medium for thermal runaway of lithium batteries.

[0029] Furthermore, the water outlet of the chiller 100 is connected to the first inlet of the electric three-way valve 200 through a pipeline, the second inlet of the electric three-way valve 200 is connected to the liquid outlet of the fire extinguishing agent storage tank 300 through a pipeline, and the output port of the electric three-way valve 200 is connected to the water inlet of the battery compartment flow channel of the battery compartment box PACK through a pipeline.

[0030] Furthermore, the return water port of the chiller 100 is connected to the battery compartment flow channel outlet of the battery compartment box PACK through a pipeline, and the controlled end of the chiller 100 is connected to an external controller (not shown in the figure) to accept the control of the controller to output cold water or hot water. Here, the controller can be a control device such as a host computer or an energy management system (EMS), which can control the chiller 100 to enter the refrigeration cycle to output cold water through the water outlet, and can also control the chiller 100 to enter the heating cycle to output hot water through the water outlet. In actual use, the controller can be connected to the chiller 100 and the dynamic three-way valve 200 of the liquid cooling and fire protection combined thermal management device to start the actual thermal management work.

[0031] Furthermore, the controlled end of the electric three-way valve 200 is connected to the controller to connect the first inlet or the second inlet with the output port under the control of the controller.

[0032] In the actual operation process, when the battery in the battery compartment box is conventionally cooled or heated, the first inlet of the electric three-way valve can be connected to the output port of the electric three-way valve, and the second inlet of the electric three-way valve and the output port of the electric three-way valve can be closed to input the coolant output by the chiller through the water outlet into the battery compartment box. Specifically, when the temperature of the battery in the battery compartment box is too low, the external controller can control the chiller to perform a thermal cycle to output heated water to the battery compartment box to increase the temperature of the battery in the battery compartment box; when the temperature of the battery in the battery compartment box is too high, the controller can control the chiller to perform a cold cycle to output refrigerated water to the battery compartment box to reduce the temperature of the battery in the battery compartment box. Here, in the prior art, the controller can collect the temperature of the battery cell through a temperature collector set at the battery cell in the battery compartment. When the temperature of the battery cell is greater than the preset temperature threshold range, it indicates that the temperature of the battery cell is too high and needs to be cooled. When the temperature of the battery cell is less than the preset temperature threshold range, it indicates that the temperature of the battery cell is too low and needs to be heated. It should be noted that the controller may identify whether the battery in the battery compartment box needs to be cooled or heated in other ways, which are not limited here.

[0033] Furthermore, when it is determined that the battery in the battery compartment box has or is about to have thermal runaway, the second inlet of the electric three-way valve can be connected to the output port of the electric three-way valve, and the first inlet of the electric three-way valve and the output port of the electric three-way valve can be closed, so that the fire extinguishing agent in the fire extinguishing agent storage tank can be input into the battery compartment box through the electric three-way valve to perform emergency cooling and fire extinguishing treatment on the battery to avoid the spread of thermal runaway of the battery. Here, in the prior art, the controller can collect the temperature of the battery cell through a temperature collector set at the battery cell in the battery compartment. When the slope of the temperature rise of the battery cell is greater than the set value, it indicates that the temperature of the battery cell has reached the thermal runaway condition, and the battery cell is or is about to have thermal runaway. It should be noted that the method for the controller to identify whether the battery in the battery compartment box has thermal runaway can also be achieved by other methods, which are not limited here.

[0034] The liquid cooling and fire fighting combined thermal management device proposed in the embodiment of the utility model can perform conventional cooling or heating of the batteries in the battery compartment box, and can also perform emergency cooling and fire extinguishing treatment on the batteries when thermal runaway occurs or is about to occur, which significantly improves the ability to perform thermal management on the batteries in the battery compartment.

[0035] In one embodiment of the present invention, optionally, Figure 2 As shown, the device also includes a battery compartment body drain electric valve 400. Specifically, the battery compartment body drain electric valve 400 is arranged at the outer shell of the battery compartment body PACK, and the controlled end of the battery compartment body drain electric valve 400 is connected to the controller (not shown in the figure) to accept the control of the controller to open or close.

[0036] Furthermore, when the battery compartment liquid discharge electric valve 400 is opened, the liquid in the battery compartment box PACK can flow out of the battery compartment box through the battery compartment liquid discharge electric valve 400. In the above embodiment, by providing the battery compartment liquid discharge electric valve at the battery compartment box, the overheated liquid in the battery compartment box can be discharged outside the battery compartment box when the battery has thermal runaway, so that the heat of the battery cell can be discharged outside the battery compartment box, thereby improving the heat dissipation speed of the battery cell.

[0037] In one embodiment of the present invention, optionally, Figure 2 As shown, the device also includes an electric three-way valve 500 for liquid inlet in the battery compartment body.

[0038] Specifically, the liquid inlet of the electric three-way valve 500 for liquid inlet into the battery compartment case is connected to the output port of the electric three-way valve 200 through a pipeline, the first liquid outlet of the electric three-way valve 500 for liquid inlet into the battery compartment case is connected to the water inlet of the battery compartment flow channel of the battery compartment case PACK through a pipeline, and the second liquid outlet of the electric three-way valve 500 for liquid inlet into the battery compartment case is connected to the liquid inlet in the battery compartment case of the battery compartment case PACK through a pipeline.

[0039] Furthermore, the controlled end of the liquid inlet electric three-way valve 500 in the battery compartment box is connected to the controller (not shown in the figure) to accept the control of the controller and connect the first liquid outlet or the second liquid outlet with the liquid inlet.

[0040] In the actual operation process, when the battery cell has or is about to have thermal runaway, the controller can control the second inlet of the electric three-way valve to be connected with the output port of the electric three-way valve, and connect the second liquid outlet of the liquid inlet electric three-way valve in the battery compartment case with the liquid inlet of the liquid inlet electric three-way valve in the battery compartment case, so as to transport the liquid fire extinguishing agent in the fire extinguishing agent storage tank to the battery compartment case through the liquid inlet of the battery compartment case of the battery compartment case, so as to perform emergency cooling and fire extinguishing on the battery cell. When the battery cell is operating normally, the controller can control the first inlet of the electric three-way valve to be connected with the output port of the electric three-way valve, and connect the first liquid outlet of the liquid inlet electric three-way valve in the battery compartment case with the liquid inlet of the liquid inlet electric three-way valve in the battery compartment case, so as to transport the liquid medium provided by the chiller to the battery compartment case through the battery compartment flow channel water inlet of the battery compartment case, so as to perform conventional cooling and heating on the battery cell. In the above embodiment, the electric three-way valve and the connectivity status of the liquid inlet electric three-way valve in the battery compartment body can be set according to the situation of the battery module, and water or liquid fire extinguishing agent can be delivered to the battery compartment body to perform thermal management of the battery module. It can cope with the conventional cooling and heating conditions of the battery module and the thermal runaway conditions at the same time, thereby improving the ability to perform thermal management on the battery.

[0041] In one embodiment of the present invention, optionally, Figure 2 As shown, the device also includes a circulating water pump 600 .

[0042] The circulating water pump 600 is arranged in the pipeline between the output port of the electric three-way valve 200 and the water inlet of the battery compartment flow channel, and is used to pump the liquid flowing through the output port of the electric three-way valve 200 into the battery compartment box PACK. Furthermore, the controlled end of the circulating water pump 600 is connected to the controller (not shown in the figure) to accept the control of the controller to be in a running state or a stopped state. In the above embodiment, the circulating water pump can be controlled to be turned on, so that the water provided by the chiller or the liquid fire extinguishing agent in the fire extinguishing agent storage tank can quickly flow into the battery compartment box, thereby improving the efficiency of battery thermal management.

[0043] In one embodiment of the present invention, optionally, Figure 3 As shown, the device further includes a first temperature sensor T1 and a second temperature sensor T2.

[0044] Specifically, the first temperature sensor T1 is arranged in the pipeline at the return water outlet of the chiller 100 to collect the return water temperature value of the chiller 100. The signal output end of the first temperature sensor T1 is connected to the controller (not shown in the figure) to send the return water temperature value of the chiller 100 to the controller.

[0045] Furthermore, the second temperature sensor T2 is arranged at the pipe at the water outlet of the chiller 100 to collect the outlet water temperature value of the chiller 100, and the signal output end of the second temperature sensor T2 is connected to the controller to send the outlet water temperature value of the chiller 100 to the controller, so that the controller performs thermal management on the battery in the battery compartment box PACK based on the return water temperature value and the outlet water temperature value. In the above embodiment, the return water temperature value and the outlet water temperature value of the chiller can be output to the controller to improve the controller's thermal management capability for the battery.

[0046] In one embodiment of the present invention, optionally, Figure 3 As shown, the device further includes a first pressure sensor P1 and a second pressure sensor P2.

[0047] Specifically, the first pressure sensor P1 is arranged in the pipeline at the return water outlet of the chiller 100 to collect the return water pressure value of the chiller 100. The signal output end of the first pressure sensor P1 is connected to the controller (not shown in the figure) to send the return water pressure value of the chiller 100 to the controller.

[0048] Furthermore, the second pressure sensor P2 is arranged in the pipeline at the water outlet of the chiller 100 to collect the outlet water pressure value of the chiller 100. The signal output end of the second pressure sensor P2 is connected to the controller to send the outlet water pressure value of the chiller 100 to the controller, so that the controller can perform thermal management of the battery in the battery compartment box PACK based on the return water temperature value, the outlet water temperature value, the return water pressure value and the outlet water pressure value.

[0049] At present, energy management systems mostly identify whether a battery is experiencing thermal runaway by analyzing the inlet and return water temperature difference and the inlet and return water pressure difference of the chiller 100. Specifically, when the temperature of the battery cell rises sharply, the inlet and return water temperature difference between the return water temperature value and the outlet water temperature value of the chiller 100 is greater than the preset temperature difference setting value, the inlet and return water pressure difference between the return water pressure value and the outlet water pressure value of the chiller 100 is greater than the preset pressure difference setting value, the battery cell temperature reaches the thermal runaway setting value and the slope of the battery cell temperature rise is greater than the preset slope setting value, it indicates that the battery cell temperature has reached the threshold for thermal runaway and the battery is experiencing or about to experience thermal runaway.

[0050] In the above embodiment, the pressure values ​​at the outlet and return water outlet of the chiller can be collected by the first pressure sensor and the second pressure sensor and sent to the controller, and the water temperature values ​​at the outlet and return water outlet of the chiller can be collected by the first temperature sensor and the second temperature sensor and sent to the controller, so that the controller can accurately monitor the thermal runaway of the battery based on the above information, and when the battery is experiencing or is about to experience thermal runaway, the battery can be urgently cooled and extinguished by the liquid cooling and fire protection combined thermal management device as soon as possible, thereby improving the thermal management capability of the battery.

[0051] It is understandable that the composition of the liquid cooling and fire fighting combined thermal management device, the selection of components, and the signal type of the interactive signal can be selected and set according to the actual scenario of the production design, and this embodiment does not specifically limit it. It should be noted that the functions of the liquid cooling and fire fighting combined thermal management device provided in this embodiment are mainly realized through the connection relationship between the pipes or circuits between the modules, and do not rely on the program module in a certain module.

[0052] On the other hand, an embodiment of the present invention provides a liquid cooling and fire fighting combined thermal management system, the system comprising the liquid cooling and fire fighting combined thermal management device and a controller as described above.

[0053] In one embodiment of the utility model, optionally, the liquid cooling and fire protection combined thermal management system further includes an alarm, the controlled end of the alarm is connected to the controller to accept the control of the controller and send out an alarm message, wherein the alarm is a buzzer or an alarm light. In the above embodiment, when the controller identifies that the battery is or is about to experience thermal runaway, an alarm message can be sent out through an alarm set in a remote safety monitoring room or other location to prompt relevant staff to deal with the thermal runaway phenomenon in a timely manner, thereby improving the thermal management capability of the battery.

[0054] In the actual operation process, when the batteries in the battery compartment are cooled or heated conventionally, the controller can connect the first inlet of the electric three-way valve with the output of the electric three-way valve, and control the first outlet of the electric three-way valve for liquid inlet in the battery compartment to connect with the inlet of the electric three-way valve for liquid inlet in the battery compartment, so as to input the coolant output by the chiller through its outlet into the battery compartment. Specifically, when the temperature of the battery in the battery compartment is too low, the controller can control the chiller to perform a thermal cycle, output heated water to the battery compartment to increase the temperature of the battery in the battery compartment; when the temperature of the battery in the battery compartment is too high, the controller can control the chiller to perform a cold cycle, output refrigerated water to the battery compartment to reduce the temperature of the battery in the battery compartment. At this time, the circulating water pump can be continuously in operation to increase the circulation speed of the coolant in the system. At the same time, the first temperature sensor and the second temperature sensor can continuously collect the water temperature values ​​at the outlet and return port of the chiller, and the first pressure sensor and the second pressure sensor can continuously collect the pressure values ​​at the outlet and return port of the chiller. The controller can obtain the above parameters to identify thermal runaway phenomena.

[0055] Furthermore, when it is determined that the battery in the battery compartment box has or is about to have thermal runaway, an alarm message can be sent through the alarm, and the second inlet of the electric three-way valve is connected to the output of the electric three-way valve, and the second liquid outlet of the liquid inlet electric three-way valve in the battery compartment box is controlled to be connected to the liquid inlet of the liquid inlet electric three-way valve in the battery compartment box, so that the fire extinguishing agent in the fire extinguishing agent storage tank is input into the battery compartment box through the electric three-way valve, and the liquid discharge electric valve in the battery compartment box is opened, and the battery is urgently cooled and extinguished, so that the high-temperature liquid in the battery compartment box flows out of the battery compartment box to take away the heat in the battery compartment box and avoid the spread of thermal runaway of the battery. At this time, the circulating water pump can also be continuously in operation to increase the speed of delivering the fire extinguishing agent into the battery compartment box.

[0056] It is understandable that the composition of the liquid cooling and fire protection combined thermal management system, the selection of components, and the signal type of the signal can be selected and set according to the actual scene of the production design, and this embodiment does not make specific restrictions. In addition, the method for the alarm to send an alarm information set in the controller can also be implemented through a program module in the prior art, and this embodiment does not make specific restrictions either.

[0057] It should be noted that the functions of the combined liquid cooling and fire protection thermal management system provided in this embodiment are mainly realized through the connection relationship between the modules, and do not rely on the program module in a certain module. In addition, for a controller that can be implanted with a program module, the realization of its module functions can be realized through the program module provided by the prior art.

[0058] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A liquid cooling and fire protection combined thermal management device, used for thermal management of batteries in a battery compartment, characterized in that: The device comprises a water chiller, an electric three-way valve and a fire extinguishing agent storage tank for storing liquid fire extinguishing agent; The water outlet of the chiller is connected to the first inlet of the electric three-way valve through a pipeline, the second inlet of the electric three-way valve is connected to the liquid outlet of the fire extinguishing agent storage tank through a pipeline, and the output port of the electric three-way valve is connected to the water inlet of the battery compartment flow channel of the battery compartment box through a pipeline; The water return port of the chiller is connected to the water outlet of the battery compartment flow channel of the battery compartment box through a pipeline, and the controlled end of the chiller is connected to an external controller to accept the control of the controller to output cold water or hot water; The controlled end of the electric three-way valve is connected to the controller to connect the first inlet or the second inlet with the output port under the control of the controller.

2. The device according to claim 1, characterized in that The device also includes an electric valve for draining liquid from the battery compartment; The battery compartment housing inner drain electric valve is arranged on the outer shell of the battery compartment housing, and the controlled end of the battery compartment housing inner drain electric valve is connected to the controller to be opened or closed under the control of the controller; When the electric valve for draining liquid in the battery compartment case is opened, the liquid in the battery compartment case can flow out of the battery compartment case through the electric valve for draining liquid in the battery compartment case.

3. The device according to claim 2, characterized in that The device also includes an electric three-way valve for liquid inlet in the battery compartment box; The liquid inlet of the electric three-way valve for liquid inlet in the battery compartment case is connected to the output port of the electric three-way valve through a pipeline, the first liquid outlet of the electric three-way valve for liquid inlet in the battery compartment case is connected to the water inlet of the battery compartment flow channel of the battery compartment case through a pipeline, and the second liquid outlet of the electric three-way valve for liquid inlet in the battery compartment case is connected to the liquid inlet in the battery compartment case of the battery compartment case through a pipeline; The controlled end of the electric three-way valve for liquid inlet in the battery compartment box is connected to the controller to accept the control of the controller and connect the first liquid outlet or the second liquid outlet with the liquid inlet.

4. The device according to claim 1, characterized in that The device also includes a circulating water pump; The circulating water pump is arranged in the pipeline between the output port of the electric three-way valve and the water inlet of the battery compartment flow channel, and is used to pump the liquid flowing through the output port of the electric three-way valve into the battery compartment box.

5. The device according to claim 4, characterized in that The controlled end of the circulating water pump is connected to the controller to be controlled by the controller to be in a running state or a stopped state.

6. The device according to claim 1, characterized in that The device also includes a first temperature sensor and a second temperature sensor; The first temperature sensor is arranged at the pipe at the return water inlet of the chiller to collect the return water temperature value of the chiller, and the signal output end of the first temperature sensor is connected to the controller to send the return water temperature value of the chiller to the controller; The second temperature sensor is arranged in the pipe at the water outlet of the chiller to collect the outlet water temperature value of the chiller. The signal output end of the second temperature sensor is connected to the controller to send the outlet water temperature value of the chiller to the controller, so that the controller performs thermal management of the battery in the battery compartment box based on the return water temperature value and the outlet water temperature value.

7. The device according to claim 6, characterized in that The device also includes a first pressure sensor and a second pressure sensor; The first pressure sensor is arranged at the pipeline at the return water inlet of the chiller to collect the return water pressure value of the chiller, and the signal output end of the first pressure sensor is connected to the controller to send the return water pressure value of the chiller to the controller; The second pressure sensor is arranged in the pipeline at the water outlet of the chiller to collect the outlet water pressure value of the chiller. The signal output end of the second pressure sensor is connected to the controller to send the outlet water pressure value of the chiller to the controller, so that the controller performs thermal management of the battery in the battery compartment box based on the return water temperature value, the outlet water temperature value, the return water pressure value and the outlet water pressure value.

8. A liquid cooling and fire fighting combined thermal management system, characterized in that: The system comprises a liquid cooling and fire fighting combined thermal management device and a controller as claimed in any one of claims 1 to 7.

9. The system according to claim 8, characterized in that The system also includes an alarm, and a controlled end of the alarm is connected to the controller to accept the control of the controller and send out alarm information.

10. The system according to claim 9, characterized in that The alarm is a buzzer or an alarm light.

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