Thermal management device and energy storage system thereof

Abstract

The invention provides a thermal management device. The thermal management device comprises a battery compartment liquid cooling temperature control assembly, a battery compartment inner cooling circulation loop, a fluorine system outer cooling circulation main loop and a fluorine system outer cooling circulation first loop. A fluorine system external cooling circulation first branch loop; a fluorine system external cooling circulation second branch loop; a water side inlet, a water side outlet, a fluorine side inlet and a fluorine side outlet are formed in the first plate heat exchanger; an electrical cabin liquid cooling temperature control assembly; a natural external cooling circulation loop; a liquid supply port of the cold circulation loop in the electrical cabin is communicated with the second liquid supply main pipeline, and a liquid return port of the cold circulation loop in the electrical cabin is communicated with the second liquid return main pipeline; the first air cooler and the second air cooler are connected in parallel; and a natural cold source switching assembly. The invention further provides an energy storage system. According to the heat management device, the battery cabin liquid cooling temperature control assembly and the electrical cabin liquid cooling temperature control assembly are arranged, cooling liquid with different temperatures and flows is provided for the battery PACK assembly and the PCS assembly, and the different heat dissipation requirements of the battery and the PCS are met.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a thermal management device and an energy storage system thereof. Background Art

[0002] With the rapid increase in energy density and power density of energy storage systems, and in order to facilitate the transportation and installation of energy storage devices, an AC / DC integrated energy storage device has emerged in the existing related technologies. The main structural form of this integrated energy storage device is a container or outdoor cabinet, which is usually composed of several battery PACKs for energy storage on the DC side and PCS and other equipment for AC / DC power conversion on the AC side. Battery PACK and PCS will generate a lot of heat during the charging and discharging process. In order to take away this heat and maintain a reasonable operating temperature and humidity range for equipment such as battery PACK and PCS, the energy storage device is equipped with a corresponding thermal management device.

[0003] The common thermal management solutions for integrated energy storage devices are as follows: One is that the battery compartment on the DC side and the electrical equipment compartment on the AC side (hereinafter referred to as the electrical compartment, mainly including PCS, etc.) adopt a dual forced air cooling solution of fan direct ventilation and air conditioning cooling. The air conditioner also has a dehumidification function, and generally no additional dehumidifier / dehumidification air conditioner is configured. However, this solution mainly uses fans and air conditioners for cooling, and the cooling medium is air. There are prominent problems such as low heat dissipation efficiency, poor temperature control uniformity, low energy efficiency ratio, poor environmental versatility, large equipment footprint, noise, and low capacity density;

[0004] One is that the battery compartment on the DC side uses a liquid cooling unit for forced liquid cooling, and the electrical compartment on the AC side still uses fans and air conditioners for forced air cooling. Usually, the battery compartment dehumidifier / dehumidification air conditioner is required to control the humidity in the cabin. However, the electrical compartment of this solution still has the defects of air cooling mentioned above; at the same time, the temperature and humidity control logic of the battery compartment liquid cooling unit and dehumidifier is usually simple. Generally, the liquid cooling unit automatically operates according to the liquid supply temperature, and there are problems such as temperature control lag, high energy consumption, and poor temperature control effect; the dehumidifier and the liquid cooling unit are generally controlled independently of each other. The low liquid supply temperature of the liquid cooling unit will cause condensation on the cold wall surface in the cabin, and the dehumidifier generally operates according to the preset fixed dehumidification target value. In addition, the local layout of the dehumidifier cannot cover the entire environment in the cabin. Insufficient gas circulation in the cabin will cause dehumidification dead corners. There are problems such as long-term operation of the dehumidifier, high energy consumption, and poor dehumidification effect;

[0005] The other is that the DC side battery compartment and the AC side electrical compartment (mainly IGBT, inductor and other devices with high heat generation) are forced to use liquid cooling units. Usually, a dehumidifier is required in the battery compartment to control the humidity in the cabin, and an air conditioner is installed in the electrical compartment for other devices in the cabin and for temperature and humidity control in the cabin. There are two main configuration forms of liquid cooling units in this scheme. One is that the AC and DC sides share a single cooling loop liquid cooling unit to provide liquid of the same temperature for power electronic equipment such as batteries and IGBTs for heat dissipation and cooling. However, the cooling water temperature requirements of power electronic devices such as batteries and IGBTs are usually very different. The battery requires a liquid supply temperature of about 20°C, while the IGBT usually requires a liquid supply temperature of up to 50°C. There will inevitably be problems such as excessive margin in the cooling capacity of the liquid cooling unit and high energy consumption. In addition, condensation is prone to occur in the electrical compartment on the AC side due to the low liquid supply temperature, resulting in equipment damage and malfunction. The second is that the liquid cooling units on the AC and DC sides are independently configured, with a total of two liquid cooling units. However, adding an additional liquid cooling unit will also have problems with economy, space occupation, and energy consumption. At the same time, the defects mentioned above still exist in the temperature and humidity control strategy and effect.

[0006] The Chinese patent "A Energy Storage Thermal Management System and Its Control Method" with publication number 117790987A provides two different cold sources through natural cold source and compression refrigeration module, determines the target operation mode based on the external ambient temperature and multiple preset operation modes, and provides heat dissipation for batteries and power electronic equipment with different heat dissipation requirements. However, in a specific operation mode, two coolants with large temperature differences are mixed and enter the battery liquid cooling plate / PCS liquid cooling plate to dissipate heat for the battery or PCS respectively. There is insufficient mixing of cold and hot fluids, resulting in disordered distribution of coolant temperature in the liquid cooling plate, causing some batteries / IGBTs to have too high temperatures, and the temperature difference of the whole machine is large. At the same time, the mixing of cold and hot fluids The unevenness will lead to a large deviation in the coolant temperature detection, which is not conducive to the matching of the unit's cooling capacity and load, and will cause a high liquid supply temperature problem; the pressure of the battery side liquid system is inconsistent with the pressure of the PCS side liquid system. Direct mixing will break the system pressure balance, causing system pressure fluctuations, causing pressure protection malfunction, and causing the pump working point to deviate, resulting in system flow fluctuations; the compression refrigeration module needs to meet the battery heat dissipation while taking into account some PCS heat dissipation requirements, which will inevitably lead to the selection of the compressor refrigeration module being too large; the unit can only dissipate heat for major heat-generating components such as battery cells and PCS, and there is no cabin environment temperature and humidity control module. The overall integration is not high, and additional air conditioners / dehumidifiers are required.

[0007] The Chinese patent "A joint thermal management device for energy storage system" with publication number 217182261U includes a first circulation system and a second circulation system. The two circulation systems provide temperature control for the inverter group and the battery module respectively, and can transfer the heat generated by the inverter group to the second circulation system through a heat exchanger to assist in heating the battery module. The first circulation system and the second circulation system are independent of each other. When the external ambient temperature is low, the unit has a large margin of heat dissipation capacity, and the battery side still needs to use a compressor for cooling, which cannot fully utilize the natural cold source, and there is a problem of high energy consumption; the unit can only dissipate heat for major heating devices such as battery cells and PCS, and there is no cabin environment temperature and humidity control module. The overall integration is not high, and additional air conditioners / dehumidifiers are required.

[0008] The Chinese patent "A thermal management system and liquid-cooled energy storage device" with publication number 116487763A includes a first liquid circulation pipeline, a second liquid circulation pipeline, a connecting pipe group and a valve group. By changing the position of the valve, the connection mode of different connecting pipe groups can be switched to achieve different circulation loop modes. Energy saving is achieved by opening and closing the switching pipeline and mixing the coolant in the two sets of circulating liquid circuits. However, there is insufficient mixing of cold and hot fluids, resulting in disordered distribution of coolant temperature in the liquid cooling plate, which may cause some batteries / IGBTs to have too high temperatures and a large temperature difference in the whole machine. At the same time, the uneven mixing of cold and hot fluids will lead to a large deviation in coolant temperature detection, which is not conducive to matching the unit's cooling capacity with the load, and leads to large fluctuations in the liquid supply temperature. The pressure of the battery-side liquid circuit system is inconsistent with the pressure of the PCS-side liquid circuit system. Direct mixing will break the system pressure balance, resulting in system pressure fluctuations, which is likely to cause false operation of the pressure protection and cause the pump working point to deviate, resulting in system flow fluctuations. The unit can only dissipate heat for major heat-generating devices such as battery cells and PCS, and there is no cabin environment temperature and humidity control module. The overall integration is not high, and additional air conditioners / dehumidifiers are required.

[0009] The Chinese patent "An integrated energy storage liquid cooling and heat management system" with publication number 117673557A includes a first water pump, a heater, a first heat exchanger, a compressor, a condenser, an expansion valve, a working heat exchanger, a second water pump, a second heat exchanger, a first dry cooler, a second dry cooler and a three-way valve. The working heat exchanger has a first heat exchange tube and a second heat exchange tube. The first water pump, the heater, the first heat exchange tube and the first heat exchanger constitute a battery heat exchange circuit. The compressor, the condenser, the expansion valve and the second heat exchange tube constitute a refrigerant circuit. The first dry cooler and the second dry cooler are arranged in parallel. The second water pump, the second heat exchanger and the first dry cooler can constitute a first heat exchange circuit. The first water pump, the second heat exchanger and the first heat exchanger can constitute a second heat exchange circuit. When the ambient temperature is low and the system needs to be heated, the waste heat of power electronic equipment such as PCS cannot be used, resulting in slow heating of the battery side and high heating energy consumption. The unit can only dissipate heat for major heat-generating components such as battery cells and PCS, and there is no cabin environment temperature and humidity control module. The overall integration is not high, and additional air conditioning / dehumidifiers are required. Summary of the invention

[0010] The present invention solves the problems in the prior art that the AC and DC side coolants are directly mixed, the heat exchange is insufficient, and the system pressure and flow fluctuations are easily caused, and the stability is poor. A thermal management device is provided, including: a temperature control cabin unit, which includes: a battery cabin liquid cooling temperature control component, including:

[0011] A cold circulation loop in the battery compartment, to which a first electric three-way valve is connected in series;

[0012] A first plate heat exchanger is provided with a fluorine side inlet and a fluorine side outlet;

[0013] A main circuit of the fluorine system external cooling cycle is connected to the fluorine side inlet and the fluorine side outlet;

[0014] Electrical compartment liquid cooling temperature control components, including:

[0015] A cold circulation loop in the electrical compartment, to which a second electric three-way valve is connected in series;

[0016] A natural external cooling circulation circuit, on which a first air cooler, a liquid inlet solenoid valve, a liquid outlet solenoid valve, and a second air cooler are connected in series, and the first air cooler and the second air cooler water circuits are connected in parallel; a natural cold source switching component, including: a natural cold source switching pipeline, on which a second solenoid valve is connected in series, and the natural cold source switching pipeline is respectively connected to the battery compartment internal cooling circulation circuit and the natural external cooling circulation circuit.

[0017] Furthermore, the thermal management device also includes a battery compartment unit, which includes: a battery cluster assembly; a battery compartment temperature control and dehumidification assembly; a battery compartment liquid cooling pipeline assembly; the battery cluster assembly includes a plurality of stacked battery PACKs, and a liquid inlet and a liquid outlet arranged on the battery PACK; the battery compartment temperature control and dehumidification assembly includes a battery compartment evaporator, which is provided with a first refrigerant inlet and a first refrigerant outlet; the battery compartment liquid cooling pipeline assembly includes a first liquid supply main line and a first liquid return main line, the first liquid supply main line is connected to the liquid inlet, and the first liquid return main line is connected to the liquid outlet.

[0018] Furthermore, the cold circulation circuit in the battery compartment is also serially connected with a first circulation pump, a first heater, a first liquid supply temperature sensor, a liquid supply port of the cold circulation circuit in the battery compartment, and a liquid return port of the cold circulation circuit in the battery compartment; the liquid supply port of the cold circulation circuit in the battery compartment is connected to the first liquid supply main line of the battery compartment liquid cooling pipeline assembly, and the liquid return port of the cold circulation circuit in the battery compartment is connected to the first liquid return main line of the battery compartment liquid cooling pipeline assembly.

[0019] Furthermore, the fluorine system external cooling circulation main loop is serially connected with a gas-liquid separator, a compressor, a condenser, a first solenoid valve, and a first drying filter.

[0020] Furthermore, the first plate heat exchanger is also provided with a water side inlet and a water side outlet, and the cold circulation loop in the battery compartment is connected with the water side inlet and the water side outlet.

[0021] Furthermore, it also includes an electrical compartment unit, which includes: a PCS component; an electrical compartment temperature control and dehumidification component; an electrical compartment liquid cooling pipeline component; the PCS component includes a plurality of stacked PCS modules, and a PCS liquid inlet and a PCS liquid outlet arranged on the PCS module; the electrical compartment temperature control and dehumidification component includes: an electrical compartment evaporator, on which a second refrigerant inlet and a second refrigerant outlet are arranged; the electrical compartment liquid cooling pipeline component includes a second liquid supply main line and a second liquid return main line, the second liquid supply main line is connected to the PCS liquid inlet, and the second liquid return main line is connected to the PCS liquid outlet.

[0022] Furthermore, the cold circulation circuit in the electrical compartment is also serially connected with a second circulation pump, a second heater, a second liquid supply temperature sensor, a liquid supply port of the cold circulation circuit in the electrical compartment, and a liquid return port of the cold circulation circuit in the electrical compartment; the liquid supply port of the cold circulation circuit in the electrical compartment is connected to the second liquid supply main line, and the liquid return port of the cold circulation circuit in the electrical compartment is connected to the second liquid return main line.

[0023] Furthermore, the battery compartment liquid cooling temperature control component also includes: a first circuit of a fluorine system external cooling cycle, on which a second drying filter is connected in series; a first branch circuit of a fluorine system external cooling cycle, on which a first electronic expansion valve and a first check valve are connected in series; a second branch circuit of a fluorine system external cooling cycle, on which a second electronic expansion valve and a second check valve are connected in series, the first circuit of the fluorine system external cooling cycle, the first branch circuit of the fluorine system external cooling cycle, and the second branch circuit of the fluorine system external cooling cycle are connected in parallel to the main circuit of the fluorine system external cooling cycle, the first branch circuit of the fluorine system external cooling cycle is connected to the first refrigerant inlet and the first refrigerant outlet; the second branch circuit of the fluorine system external cooling cycle is connected to the second refrigerant inlet and the second refrigerant outlet.

[0024] Furthermore, the temperature control cabin unit also includes a waste heat recovery component, which includes:

[0025] A second plate heat exchanger is provided with a first pair of liquid inlets and a liquid outlet, and a second pair of liquid inlets and a liquid outlet;

[0026] A battery-side waste heat recovery liquid inlet pipeline, on which a third solenoid valve is arranged;

[0027] The battery side waste heat recovery liquid return pipeline is provided with a third check valve;

[0028] The electrical side waste heat recovery liquid inlet pipeline is provided with a fourth solenoid valve;

[0029] The electrical side waste heat recovery liquid return pipeline is provided with a fourth check valve.

[0030] Furthermore, the temperature control cabin unit also includes a fluid replenishment component, which includes:

[0031] A liquid replenishing tank, the bottom of which is provided with a drain valve;

[0032] Fluid infusion pump;

[0033] A battery compartment refilling branch, to which a fifth check valve and a fifth solenoid valve are connected in series;

[0034] The electrical compartment liquid replenishing branch is connected in series with a sixth check valve and a sixth solenoid valve;

[0035] The battery compartment refill branch is connected to the cold circulation circuit in the battery compartment, and the electrical compartment refill branch is connected to the electrical compartment liquid cooling temperature control component.

[0036] Furthermore, the battery compartment unit also includes a battery compartment air duct assembly, which includes an air supply duct and an air return duct arranged on the inner wall of the battery compartment unit, a main air supply outlet and multiple branch air supply outlets arranged on the air supply duct, and a main return air outlet and multiple branch return air outlets arranged on the return air duct.

[0037] Furthermore, the battery compartment temperature control and dehumidification assembly also includes a first air supply port and a first air return port, the first air supply port is connected to the main air supply port, and the first return air port is connected to the main return air port.

[0038] Furthermore, the battery compartment liquid cooling pipeline assembly also includes: a plurality of first liquid supply secondary pipelines connected to the first liquid supply main pipeline, a plurality of first liquid supply branch pipelines connected to the first liquid supply secondary pipeline; a plurality of first liquid return secondary pipelines connected to the first liquid return main pipeline, a plurality of first liquid return branch pipelines connected to the first liquid return secondary pipeline; and a first exhaust valve arranged at the top end of the first liquid return secondary pipeline.

[0039] Furthermore, the electrical compartment liquid cooling pipeline assembly also includes: a plurality of second liquid supply secondary pipelines connected to the second liquid supply main pipeline, a plurality of second liquid supply branch pipelines connected to the second liquid supply secondary pipeline, the second liquid supply branch pipeline is connected to the PCS liquid inlet; a plurality of second liquid return secondary pipelines connected to the second liquid return main pipeline, a plurality of second liquid return branch pipelines connected to the second liquid return secondary pipeline, the second liquid return branch pipeline is connected to the PCS liquid outlet; and a second exhaust valve arranged on the top pipe of the second liquid return secondary pipeline.

[0040] Furthermore, the working mode of the thermal management device includes a first working mode. When in the first working mode, the second solenoid valve is opened, the opening degree of the first electric three-way valve is between 0° and 90°, and the coolant in the cold circulation loop in the battery compartment flows through the first plate heat exchanger and the second air cooler at the same time, and mixed secondary heat exchange is performed through the external cold circulation main loop of the fluorine system and the second air cooler; the liquid inlet solenoid valve is closed, the liquid outlet solenoid valve is closed, the opening degree of the second electric three-way valve is 0°, and the coolant in the cold circulation loop in the electrical compartment all flows through the first air cooler for secondary heat exchange.

[0041] Furthermore, the working mode of the thermal management device includes a second working mode. When in the second working mode, the second solenoid valve is closed, the opening degree of the first electric three-way valve is 0°, and the coolant in the cold circulation loop in the battery compartment all flows through the first plate heat exchanger, and secondary heat exchange is performed through the external cooling circulation main loop of the fluorine system; the liquid inlet solenoid valve is opened, the liquid outlet solenoid valve is opened, the opening degree of the second electric three-way valve is 0°, and the coolant in the cold circulation loop in the electrical compartment all flows through the natural external cooling circulation loop, and secondary heat exchange is performed through the first air cooler and the second air cooler.

[0042] Furthermore, the working mode of the thermal management device includes a third working mode. When in the third working mode, the second solenoid valve is opened, the opening degree of the first electric three-way valve is 90°, the liquid inlet solenoid valve is closed, the liquid outlet solenoid valve is closed, and the coolant in the cold circulation loop in the battery compartment all flows through the natural cold source switching pipeline, and performs secondary heat exchange through the second air cooler; the opening degree of the second electric three-way valve is 0°, and the coolant in the cold circulation loop in the electrical compartment all flows through the first air cooler for secondary heat exchange.

[0043] Furthermore, the working mode of the thermal management device includes a fourth working mode. When in the fourth working mode, the second solenoid valve is closed, the first solenoid valve is closed, the first circulation pump is started, and the first heater is turned on for heating.

[0044] Furthermore, the working mode of the thermal management device includes a fifth working mode. When in the fifth working mode, the second solenoid valve is closed, the second circulation pump is started, the second heater is turned on for heating, and the second electric three-way valve is opened by 90°.

[0045] Furthermore, the operating mode of the thermal management device includes a sixth operating mode. When in the sixth operating mode, the opening of the second electric three-way valve changes with the sampling value of the second liquid supply temperature sensor, only part of the coolant flows through the natural external cooling circulation loop, and the second heater starts / stops heating according to the sampling value of the second liquid supply temperature sensor.

[0046] Furthermore, the battery compartment liquid cooling temperature control component also includes: a first branch circuit (301d) of the fluorine system external cooling cycle, to which a first electronic expansion valve is connected in series, and the working mode of the thermal management device includes a seventh working mode. When in the seventh working mode, the compressor is started, the condenser is started, the first solenoid valve is opened, the battery compartment evaporator is opened, and the first electronic expansion valve is opened.

[0047] Furthermore, the thermal management device also includes an electrical compartment unit, which includes an electrical compartment temperature control and dehumidification component, and the electrical compartment temperature control and dehumidification component includes: an electrical compartment evaporator, and the battery compartment liquid cooling temperature control component also includes a second branch loop of the fluorine system external cooling cycle, on which a second electronic expansion valve is connected in series. The working mode of the thermal management device includes an eighth working mode. When in the eighth working mode, the compressor starts, the condenser starts, the first solenoid valve opens, the electrical compartment evaporator opens, and the second electronic expansion valve opens.

[0048] Furthermore, a second circulation pump is connected in series to the cold circulation loop in the electrical compartment, and the working mode of the thermal management device includes a ninth working mode. When in the ninth working mode, the third solenoid valve is opened, the fourth solenoid valve is opened, the second electric three-way valve is opened by 90 degrees, the first circulation pump is started, the second circulation pump is started, and the cold circulation loop in the battery compartment and the cold circulation loop in the electrical compartment exchange heat through the second plate heat exchanger, and the heat generated by the PCS module during operation is used to heat the battery cells.

[0049] Furthermore, the working mode of the thermal management device includes a tenth working mode. When in the tenth working mode, the cold circulation loop in the battery compartment includes a first return liquid pressure sensor. When the sampling value of the first return liquid pressure sensor is lower than the first set value, the fifth solenoid valve is opened, the rehydration pump is started, and the coolant in the rehydration tank is added to the cold circulation loop in the battery compartment. When the sampling value of the first return liquid pressure sensor reaches the second set value, the fifth solenoid valve is closed, the rehydration pump is stopped, and the rehydration is completed; the cold circulation loop in the electrical compartment includes a second return liquid pressure sensor. When the sampling value of the second return liquid pressure sensor is lower than the third set value, the sixth solenoid valve is opened, the rehydration pump is started, and the coolant in the rehydration tank is added to the cold circulation loop in the electrical compartment. When the sampling value of the second return liquid pressure sensor reaches the fourth set value, the sixth solenoid valve is closed, the rehydration pump is stopped, and the rehydration is completed.

[0050] The present invention also provides an energy storage system, comprising the above-mentioned thermal management device.

[0051] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects: the thermal management device of the present invention provides cooling liquids of different temperatures and flows for the battery PACK and PCS components respectively by setting up the battery compartment liquid cooling temperature control component and the electrical compartment liquid cooling temperature control component, thereby meeting the differential heat dissipation requirements of the battery and PCS. The thermal management device of the present invention integrates a temperature control dehumidification module, and adopts an independent dehumidification air duct based on the dynamic dehumidification logic of the cabin ambient temperature, which greatly reduces the dehumidification energy consumption, meets the temperature and humidity control requirements of the battery compartment and the electrical compartment, and improves the integration of the unit.

[0052] Furthermore, the thermal management device of the present invention can automatically switch the operating mode according to the ambient temperature and thermal management requirements, including high-temperature refrigeration, low-temperature refrigeration, mixed refrigeration, waste heat recovery and other modes; switching between multiple operating modes can improve the energy efficiency ratio of the unit, while avoiding the system pressure fluctuation problem caused by the mixing of multi-circuit coolants, thereby improving the stability of the unit operation.

[0053] In addition, the present invention also provides an energy storage system, including a thermal management device, which is the thermal management device described in any of the above schemes. Since the thermal management device has the aforementioned technical effects, the energy storage system having the thermal management device should also have corresponding technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the structural arrangement of the thermal management device provided by the present invention;

[0055] Figure 2 It is a schematic diagram of the structural arrangement of the battery compartment unit in the thermal management device provided by the present invention;

[0056] Figure 3 It is a schematic diagram of the structural arrangement of the electrical compartment unit in the thermal management device provided by the present invention;

[0057] Figure 4 This is a schematic diagram of the structural layout of the temperature control cabin unit in the thermal management device provided by the present invention. DETAILED DESCRIPTION

[0058] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0061] It should be understood that the use of "system", "device", "unit" and / or "module" in this application is merely a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

[0062] The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0063] In order to better understand the purpose, structure and function of the present invention, the thermal management device of the present invention is further described in detail below with reference to the accompanying drawings.

[0064] Figure 1 It is a schematic diagram of the structural arrangement of the thermal management device provided by the present invention; Figure 2 It is a schematic diagram of the structural arrangement of the battery compartment unit in the thermal management device provided by the present invention; Figure 3 It is a schematic diagram of the structural arrangement of the electrical compartment unit in the thermal management device provided by the present invention; Figure 4 This is a schematic diagram of the temperature control cabin unit structure layout in the thermal management device provided by the present invention. Figures 1 to 4 , a thermal management device, comprising: a battery compartment unit 100, an electrical compartment unit 200, and a temperature control compartment unit 300; wherein the battery compartment unit 100 comprises: a battery cluster assembly comprising a plurality of stacked battery PACKs 101a, and a liquid inlet 101a-1 and a liquid outlet 101a-2 arranged on the battery PACK;

[0065] The battery compartment unit 100 also includes a battery compartment air duct assembly, which includes an air supply duct 102a and an air return duct 102b arranged on the inner wall of the battery compartment unit, a main air supply outlet 102a-1 and multiple branch air supply outlets 102a-2 arranged on the air supply duct 102a, and a main return air outlet 102b-1 and multiple branch return air outlets 102b-2 arranged on the return air duct 102b.

[0066] The battery compartment unit 100 also includes a battery compartment temperature control and dehumidification assembly, which includes: a battery compartment evaporator 103a, on which a first refrigerant inlet 103a-1 and a first refrigerant outlet 103a-2 are provided; a battery compartment evaporating fan 103b, a first air supply port 103c and a first return air port 103d, the first air supply port 103c is connected to the main air supply port 102a-1, and the first return air port 103d is connected to the main return air port 102b-1; and a first condensation drain pipe 103e located at the bottom of the battery evaporator 103a.

[0067] The hot and humid air in the battery compartment unit 100 is driven by the battery compartment evaporator 103b, is sucked into the return air duct 102b through the branch return air port 102b-2, and then enters the battery compartment evaporator 103a through the main return air port 102b-1 to be cooled and dehumidified into dry cold air, and then enters the supply air duct 102a through the main supply air port 102a-1 and is then sent out from the branch supply air port 102a-2. This cycle is repeated to keep the environment inside the battery compartment unit 100 within a suitable temperature and humidity range.

[0068] The battery compartment unit 100 further includes a battery compartment liquid cooling pipeline assembly, which includes a first liquid supply main pipeline 104a and a first liquid return main pipeline 104d, wherein the first liquid supply main pipeline 104a is connected to the liquid inlet 101a-1, and the first liquid return main pipeline 104d is connected to the liquid outlet 101a-2; specifically, the battery compartment liquid cooling pipeline assembly further includes: a plurality of first liquid supply secondary pipelines 104b connected to the first liquid supply secondary pipeline 104a, and a plurality of first liquid supply secondary pipelines 104d connected to the first liquid supply secondary pipeline 104d. a plurality of first liquid supply branch pipelines 104c connected to the first liquid return main pipeline 104d, and a plurality of first liquid return branch pipelines 104f connected to the first liquid return secondary pipeline 104e, and the first liquid return branch pipeline 104f is directly connected to the liquid outlet 101a-2; and a first exhaust valve 104g is arranged at the top of the first liquid return secondary pipeline 104e.

[0069] The electrical compartment unit 200 comprises:

[0070] The PCS assembly includes a plurality of stacked PCS modules 201a, and a PCS liquid inlet 201a-1 and a PCS liquid outlet 201a-2 disposed on the PCS modules 201a;

[0071] The electrical compartment temperature control and dehumidification assembly includes: an electrical compartment evaporator 202a, on which a second refrigerant inlet 202a-1 and a second refrigerant outlet 202a-2 are provided; an electrical compartment evaporation fan 202b, a second air supply port 202c, and a second air return port 202d; and a second condensation drain pipe 202e provided at the bottom of the electrical compartment evaporator 202a;

[0072] The hot and humid air in the electrical compartment unit 200 is driven by the electrical compartment evaporation fan 202b, enters the electrical compartment evaporator 202a through the second return air port 202d to be cooled and dehumidified into dry cold air, and is sent out through the second air supply port 202c. The cycle is repeated to keep the environment in the electrical compartment unit 200 within a suitable temperature and humidity range.

[0073] The electrical compartment liquid cooling pipeline assembly includes a second liquid supply main pipeline 203a and a second liquid return main pipeline 203d, wherein the second liquid supply main pipeline 203a is connected to the PCS liquid inlet 201a-1, and the second liquid return main pipeline 203d is connected to the PCS liquid outlet 201a-2; the electrical compartment liquid cooling pipeline assembly also includes: a plurality of second liquid supply secondary pipelines 203b connected to the second liquid supply main pipeline 203a, and a plurality of second liquid supply branch pipelines 203c connected to the second liquid supply secondary pipelines 203b; the second liquid supply branch pipeline 203c is connected to the PCS liquid inlet 201a-1;

[0074] A plurality of second liquid return sub-pipelines 203e connected to the second liquid return main pipeline 203d, a plurality of second liquid return branch pipelines 203f connected to the second liquid return sub-pipeline 203e, the second liquid return branch pipeline 203f being connected to the PCS liquid outlet 201a-2; a second exhaust valve 203g arranged on the top pipe of the second liquid return sub-pipeline 203e.

[0075] The temperature control cabin unit 300 includes a battery cabin liquid cooling temperature control assembly, which includes: a cold circulation loop 301a in the battery cabin, on which are connected in series a first circulation pump 301a-1, a first electric three-way valve 301a-2, a first heater 301a-3, a first filter 301a-4, a first liquid supply temperature sensor 301a-5, a first liquid return temperature sensor 301a-6, a first liquid supply pressure sensor 301a-7, a first liquid return pressure sensor 301a-8, a first expansion tank 301a-9, a third exhaust valve 301a-10, a liquid supply port 301a-11 of the cold circulation loop in the battery cabin, and a liquid return port 301a-12 of the cold circulation loop in the battery cabin;

[0076] The battery compartment liquid cooling temperature control component also includes: a main fluorine system external cooling cycle circuit 301b, on which a gas-liquid separator 301b-1, a compressor 301b-2, a condenser 301b-3, a first solenoid valve 301b-4, a first drying filter 301b-5, and an expansion valve 301b-6 are connected in series; a first fluorine system external cooling cycle circuit 301c, and a second drying filter 301c-1 arranged on the first fluorine system external cooling cycle circuit 301c; a first branch circuit of the fluorine system external cooling cycle The circuit 301d is connected in series with the first electronic expansion valve 301d-1 and the first check valve 301d-2; the second branch circuit 301e of the fluorine system external cooling cycle is sequentially provided with the second electronic expansion valve 301e-1 and the second check valve 301e-2 on the second branch circuit 301e of the fluorine system external cooling cycle; the first plate heat exchanger 301f is provided with a water side inlet 301f-1, a water side outlet 301f-2, a fluorine side inlet 301f-3, and a fluorine side outlet 301f-4;

[0077] The liquid supply port 301a-11 of the cold circulation circuit in the battery compartment is connected to the first liquid supply main line 104a, the liquid return port 301a-12 of the cold circulation circuit in the battery compartment is connected to the first liquid return main line 104d, the first branch circuit 301d of the fluorine system external cold circulation is connected to the first refrigerant inlet 103a-1 and the first refrigerant outlet 103a-2; the second branch circuit 301e of the fluorine system external cold circulation is connected to the second refrigerant inlet 202a-1 and the second refrigerant outlet The battery compartment is connected to the port 202a-2, the battery compartment internal cold circulation loop 301a is connected to the water side inlet 301f-1 and the water side outlet 301f-2, the fluorine system external cold circulation main loop 301b is connected to the fluorine side inlet 301f-3 and the fluorine side outlet 301f-4, the fluorine system external cold circulation first loop 301c, the fluorine system external cold circulation first branch loop 301d, and the fluorine system external cold circulation second branch loop 301e are connected in parallel to the fluorine system external cold circulation main loop 301b;

[0078] The temperature control cabin unit 300 also includes an electrical cabin liquid cooling temperature control component, including: a cold circulation loop 302a in the electrical cabin, on which are connected in series a second circulation pump 302a-1, a second electric three-way valve 302a-2, a second heater 302a-3, a second filter 302a-4, a second liquid supply temperature sensor 302a-5, a second liquid return temperature sensor 302a-6, a second liquid supply pressure sensor 302a-7, a second liquid return pressure sensor 302a-8, a second expansion tank 302a-9, a fourth exhaust valve 302a-10, and a liquid supply port 302a- 11. Liquid return port 302a-12 of cold circulation loop in electrical compartment; natural external cooling circulation loop 302c, on which first air cooler 302c-1, liquid inlet solenoid valve 302c-2, liquid outlet solenoid valve 302c-3, second air cooler 302c-4 are connected in series; liquid supply port 302a-11 of cold circulation loop in electrical compartment is connected with second liquid supply main line 203a, liquid return port 302a-12 of cold circulation loop in electrical compartment is connected with second liquid return main line 203d; first air cooler 302c-1 and second air cooler 302c-4 are connected in parallel in water circuit;

[0079] The temperature control cabin unit 300 also includes a natural cold source switching component, including: a natural cold source switching pipeline 303c, on which a seventh check valve 303c-1 and a second solenoid valve 303c-2 are connected in series; the natural cold source switching pipeline 303c is respectively connected to the battery compartment internal cold circulation loop 301a and the natural external cold circulation loop 302c.

[0080] The temperature control cabin unit 300 also includes a liquid replenishing assembly, which includes a liquid replenishing tank 304a, a drain valve 304a-1 disposed at the bottom of the liquid replenishing tank 304a, a liquid replenishing pump 304b, a battery compartment liquid replenishing branch 304c, a fifth check valve 304c-1 disposed on the battery compartment liquid replenishing branch 304c, a fifth solenoid valve 304c-2, an electrical compartment liquid replenishing branch 304d, a sixth check valve 304d-1 disposed on the electrical compartment liquid replenishing branch 304d, and a sixth solenoid valve 304d-2. The battery compartment liquid replenishing branch 304c is connected to the cold circulation circuit 301a in the battery compartment; the electrical compartment liquid replenishing branch 304d is connected to the cold circulation circuit 302a in the electrical compartment.

[0081] The temperature control cabin unit 300 also includes a waste heat recovery component, which includes a second plate heat exchanger 305a, a first pair of liquid inlets 305a-1 and a liquid outlet 305a-2 arranged on the second plate heat exchanger 305a, a second pair of liquid inlets 305a-3 and a liquid outlet 305a-4, a battery side waste heat recovery liquid inlet pipeline 305b, a third solenoid valve 305b-1 arranged on the battery side waste heat recovery liquid inlet pipeline 305b, a battery side waste heat recovery liquid return pipeline 305c, a third check valve 305c-1 arranged on the battery side waste heat recovery liquid return pipeline 305c, an electrical side waste heat recovery liquid inlet pipeline 305d, a fourth solenoid valve 305d-1 arranged on the electrical side waste heat recovery liquid inlet pipeline 305d, an electrical side waste heat recovery liquid return pipeline 305e, and a fourth check valve 305e-1 arranged on the electrical side waste heat recovery liquid return pipeline 305e.

[0082] In a further embodiment, the working mode of the above-mentioned thermal management device may specifically include a first working mode. When in the first working mode, the second solenoid valve 303c-2 is opened, the opening degree of the first electric three-way valve 301a-2 is between 0° and 90°, and the coolant in the cold circulation loop 301a in the battery compartment flows through the first plate heat exchanger 301f and the second air cooler 302c-4 at the same time, and mixed secondary heat exchange is performed through the external cold circulation main loop 301b of the fluorine system and the second air cooler 302c-4; the liquid inlet solenoid valve 302c-2 is closed, the liquid outlet solenoid valve 302c-3 is closed, the opening degree of the second electric three-way valve 302a-2 is 0°, and the coolant in the cold circulation loop 302a in the electrical compartment all flows through the first air cooler 302c-1 for secondary heat exchange. In an embodiment of the present invention, when the ambient temperature is within a certain range, the above-mentioned first working mode is executed, specifically the mixed cooling mode, and the battery compartment is cooled by a plate heat exchanger and an air cooler at the same time. On the basis of the operation of the air cooler, if further cooling is required, the variable frequency compressor used at this time selects low power operation and cools through the plate heat exchanger; the electrical compartment is cooled by another air cooler, and the battery compartment and the electrical compartment are cooled in groups at the same time. The water circuits on both sides are independent, and there is no problem of system pressure fluctuation, which improves the stability of the unit operation. By providing coolants with different temperatures and flows for the battery PACK and PCS modules, the different heat dissipation requirements of the battery and PCS are met.

[0083] In some other specific embodiments, the working mode of the thermal management device may also specifically include other working modes. When in the second working mode, the second solenoid valve 303c-2 is closed, the opening degree of the first electric three-way valve 301a-2 is 0°, and the coolant in the cold circulation loop 301a in the battery compartment all flows through the first plate heat exchanger 301f, and performs secondary heat exchange through the external cold circulation main loop 301b of the fluorine system; the liquid inlet solenoid valve 302c-2 is opened, the liquid outlet solenoid valve 302c-3 is opened, and the opening degree of the second electric three-way valve 302a-2 is 0°, and the coolant in the cold circulation loop 302a in the electrical compartment all flows through the natural external cold circulation loop 302c, and performs secondary heat exchange through the first air cooler 302c-1 and the second air cooler 302c-4. In the embodiment of the present invention, when the ambient temperature is higher than a certain set value, the second working mode is executed, specifically the high-temperature cooling mode. In this high-temperature cooling mode, for the battery compartment, the variable frequency compressor selects high-power operation and uses the plate heat exchanger for heat exchange and cooling, and for the electrical compartment, two air coolers are used for cooling at the same time. When the ambient temperature reaches the standard value, the high-temperature cooling mode is exited.

[0084] When in the third working mode, the second solenoid valve 303c-2 is opened, the first electric three-way valve 301a-2 is opened at 90°, the liquid inlet solenoid valve 302c-2 is closed, the liquid outlet solenoid valve 302c-3 is closed, and the cooling liquid in the cold circulation loop 301a in the battery compartment flows through the natural cold source switching pipeline 303c, and the second air cooler 302c-4 is used for secondary heat exchange; the second electric three-way valve 302a-2 is opened at 0°, and the cooling liquid in the cold circulation loop 302a in the electrical compartment flows through the first air cooler 302c-1 for secondary heat exchange. In an embodiment of the present invention, when the ambient temperature is lower than a certain set value, the third working mode is executed, specifically the low-temperature refrigeration mode. In this low-temperature refrigeration mode, the compressor does not work, and the two air coolers cool the battery compartment and the electrical compartment respectively. When the ambient temperature reaches the standard value, the low-temperature refrigeration mode is exited. In this refrigeration mode, because the ambient temperature is relatively low, the refrigeration demand of the entire system can be met by relying solely on the air cooler, which greatly reduces the energy consumption of the system.

[0085] When in the fourth working mode, the second solenoid valve 303c-2 is closed, the first solenoid valve 301b-4 is closed, the first circulation pump 301a-1 is started, and the first heater 301a-3 is turned on for heating. In the embodiment of the present invention, when the ambient temperature is lower than a certain set value, the fourth working mode is executed, specifically the battery compartment heating mode, and when the ambient temperature reaches the standard value, the battery compartment heating mode is exited.

[0086] When in the fifth working mode, the second solenoid valve 303c-2 is closed, the second circulating pump 302a-1 is started, the second heater 302a-3 is turned on for heating, and the second electric three-way valve 302a-2 is opened at 90°. At this time, the coolant in the cold circulation loop 302a in the electrical compartment no longer flows through the natural external cooling circulation loop 302c to improve the heating efficiency. In the embodiment of the present invention, when the ambient temperature is lower than a certain set value, the fifth working mode is executed, specifically the electrical compartment heating mode, and when the ambient temperature reaches the standard value, the electrical compartment heating mode is exited.

[0087] When in the sixth working mode, the opening of the second electric three-way valve 302a-2 changes with the sampling value of the second liquid supply temperature sensor 302a-5, and only part of the coolant flows through the natural external cooling circulation loop 302c. The second heater 302a-3 starts / stops heating according to the sampling value of the second liquid supply temperature sensor 302a-5. In an embodiment of the present invention, when the sampling value of the second liquid supply temperature sensor 302a-5 is lower than the ambient temperature of the electrical compartment, the sixth working mode is executed, specifically the electrical compartment anti-condensation mode, to prevent condensation on the surface of the pipelines and liquid cold plates in the electrical compartment due to the coolant temperature being too low in a low temperature environment.

[0088] When in the seventh working mode, the compressor 301b-2 is started, the condenser 301b-3 is started, the first solenoid valve 301b-4 is turned on, the battery compartment evaporator 103a is turned on, and the first electronic expansion valve 301d-1 is turned on. In the embodiment of the present invention, the seventh working mode is specifically a battery compartment refrigeration / dehumidification mode. When the battery compartment temperature is greater than a certain value or the battery compartment humidity is greater than a certain value, the battery compartment refrigeration / dehumidification mode is executed, and the temperature value and humidity value are associated with the sampling value of the first liquid supply temperature sensor 301a-5 and the battery compartment ambient temperature sampling value, which can ensure that within the full temperature range, when condensation does not occur in the battery compartment unit 100, the dehumidification power consumption is reduced.

[0089] When in the eighth working mode, the compressor 301b-2 is started, the condenser 301b-3 is started, the first solenoid valve 301b-4 is opened, the electrical compartment evaporator 202a is opened, and the second electronic expansion valve 301e-1 is opened. In the embodiment of the present invention, the eighth working mode is specifically the electrical compartment refrigeration / dehumidification mode. When the temperature of the electrical compartment is greater than a certain value or the humidity of the electrical compartment is greater than a certain value, the electrical compartment refrigeration / dehumidification mode is executed, and the temperature value and humidity value are associated with the sampling value of the second liquid supply temperature sensor 302a-5 and the sampling value of the electrical compartment ambient temperature, which can ensure that within the full temperature range, when condensation does not occur in the electrical compartment unit 200, the dehumidification power consumption is reduced.

[0090] When in the ninth working mode, the third solenoid valve 305b-1 is opened, the fourth solenoid valve 305d-1 is opened, the second electric three-way valve 302a-2 is opened at 90°, the first circulation pump 301a-1 is started, the second circulation pump 302a-1 is started, and the cold circulation loop 301a in the battery compartment and the cold circulation loop 302a in the electrical compartment exchange heat through the second plate heat exchanger 305a. In an embodiment of the present invention, the ninth working mode is an energy storage working state, specifically a waste heat recovery mode. When the average temperature of the battery cell is less than a certain value, the waste heat recovery mode is executed. The battery cell is heated by using the heat generated by the PCS module during operation, which can improve the heating efficiency of the battery in a low temperature environment and reduce the refrigeration power consumption of the PCS.

[0091] When in the tenth working mode, the cold circulation loop in the battery compartment includes a first liquid return pressure sensor 301a-8. When the sampling value of the first liquid return pressure sensor 301a-8 is lower than a first set value, the fifth solenoid valve 304c-2 is opened, and the liquid replenishment pump 304b is started to replenish the coolant in the liquid replenishment tank 304a into the cold circulation loop 301a in the battery compartment. When the sampling value of the first liquid return pressure sensor 301a-8 reaches a second set value, the fifth solenoid valve 304c-2 is opened, and the liquid replenishment pump 304b is started to replenish the coolant in the liquid replenishment tank 304a into the cold circulation loop 301a in the battery compartment. 2 is closed, the refill pump 304b is stopped, and the refill is completed; when the sampling value of the second liquid return pressure sensor 302a-8 is lower than the third set value, the sixth solenoid valve 304d-2 is opened, the refill pump 304b is started, and the coolant in the refill tank 304a is added to the cold circulation loop 302a in the electrical compartment; when the sampling value of the second liquid return pressure sensor 302a-8 reaches the fourth set value, the sixth solenoid valve 304d-2 is closed, the refill pump 304b is stopped, and the refill is completed. In the embodiment of the present invention, the tenth working mode is the refill mode, and when the sampling value of the first liquid return pressure sensor 301a-8 is less than a certain set value or the sampling value of the second liquid return pressure sensor 302a-8 is less than a certain set value, the refill mode is executed; when the sampling value of the first liquid return pressure sensor 301a-8 is greater than or equal to a certain standard value or the sampling value of the second liquid return pressure sensor 302a-8 is greater than or equal to a certain standard value, the refill mode is exited.

[0092] The thermal management device provided by the present invention can meet the different heat dissipation requirements of power electronic devices such as DC-side batteries and AC-side PCS. At the same time, the thermal management device integrates an ambient temperature and humidity control module, which can automatically switch the operating mode according to the ambient temperature and humidity and the characteristic temperature of the device, thereby improving the energy efficiency ratio of the unit and greatly reducing the system energy consumption through natural cooling sources and waste heat utilization.

[0093] In addition, the present invention also provides an energy storage system, including a thermal management device, which is the thermal management device described in any of the above schemes. Since the thermal management device has the aforementioned technical effects, the energy storage system having the thermal management device should also have corresponding technical effects, which will not be repeated here.

[0094] It is to be understood that the present invention is described by the above-mentioned embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A thermal management device, characterized in that: A temperature control chamber unit (300) is provided, comprising: Battery compartment liquid cooling temperature control components, including: A cold circulation loop (301a) in the battery compartment, to which a first electric three-way valve (301a-2) is connected in series; A first plate heat exchanger (301f) is provided with a fluorine side inlet (301f-3) and a fluorine side outlet (301f-4); The fluorine system external cooling circulation main loop (301b) is connected to the fluorine side inlet (301f-3) and the fluorine side outlet (301f-4); Electrical compartment liquid cooling temperature control components, including: A cold circulation loop (302a) in the electrical compartment, to which a second electric three-way valve (302a-2) is connected in series; A natural external cooling circulation loop (302c), on which a first air cooler (302c-1), a liquid inlet solenoid valve (302c-2), a liquid outlet solenoid valve (302c-3), and a second air cooler (302c-4) are connected in series, and the first air cooler (302c-1) and the second air cooler (302c-4) are connected in parallel in water circuit; The natural cold source switching component comprises: a natural cold source switching pipeline (303c) to which a second solenoid valve (303c-2) is connected in series, and the natural cold source switching pipeline (303c) is respectively connected to a battery compartment internal cold circulation loop (301a) and a natural external cold circulation loop (302c).

2. The thermal management device according to claim 1, characterized in that: It also includes a battery compartment unit (100), which includes: a battery cluster assembly; a battery compartment temperature control and dehumidification assembly; and a battery compartment liquid cooling pipeline assembly; the battery cluster assembly includes a plurality of stacked battery PACKs (101a), and a liquid inlet (101a-1) and a liquid outlet (101a-2) arranged on the battery PACKs; the battery compartment temperature control and dehumidification assembly includes a battery compartment evaporator (103a), which is provided with a first refrigerant inlet (103a-1) and a first refrigerant outlet (103a-2); the battery compartment The liquid cooling pipeline assembly comprises a first liquid supply main pipeline (104a) and a first liquid return main pipeline (104d), wherein the first liquid supply main pipeline (104a) is connected to the liquid inlet (101a-1), and the first liquid return main pipeline (104d) is connected to the liquid outlet (101a-2); the battery compartment unit (100) further comprises a battery compartment air duct assembly, which comprises an air supply duct (102a) and a return air duct (102b) arranged on the inner wall surface of the battery compartment unit, and a main air duct (102a) arranged on the air supply duct (102a) An air supply port (102a-1) and a plurality of branch air supply ports (102a-2), a main return air port (102b-1) and a plurality of branch return air ports (102b-2) arranged on the return air duct (102b), the battery compartment temperature control and dehumidification assembly further comprising a first air supply port (103c) and a first return air port (103d), the first air supply port (103c) being in communication with the main air supply port (102a-1), and the first return air port (103d) being in communication with the main return air port (102b-1); the battery compartment liquid cooling pipe The pipeline assembly further comprises: a plurality of first liquid supply sub-pipelines (104b) connected to the first liquid supply main pipeline (104a), a plurality of first liquid supply branch pipelines (104c) connected to the first liquid supply sub-pipeline (104b); a plurality of first liquid return sub-pipelines (104e) connected to the first liquid return main pipeline (104d), a plurality of first liquid return branch pipelines (104f) connected to the first liquid return sub-pipeline (104e); and a first exhaust valve (104g) arranged at the top end of the first liquid return sub-pipeline (104e).

3. The thermal management device according to claim 2, characterized in that: The cold circulation loop (301a) in the battery compartment is also serially connected with a first circulation pump (301a-1), a first heater (301a-3), a first liquid supply temperature sensor (301a-5), a liquid supply port (301a-11) of the cold circulation loop in the battery compartment, and a liquid return port (301a-12) of the cold circulation loop in the battery compartment. The liquid supply port (301a-11) of the cold circulation loop in the battery compartment is connected to a first liquid supply main line (104a) of the battery compartment liquid cooling pipeline assembly, and the liquid return port (301a-12) of the cold circulation loop in the battery compartment is connected to a first liquid return line (104a) of the battery compartment liquid cooling pipeline assembly. The main line (104d) is connected; the external cooling circulation main circuit (301b) of the fluorine system is connected in series with a gas-liquid separator (301b-1), a compressor (301b-2), a condenser (301b-3), a first solenoid valve (301b-4), and a first drying filter (301b-5); the first plate heat exchanger (301f) is also provided with a water side inlet (301f-1) and a water side outlet (301f-2), and the battery compartment internal cooling circulation circuit (301a) is connected with the water side inlet (301f-1) and the water side outlet (301f-2).

4. The thermal management device according to claim 1 or 2, characterized in that: The invention also comprises an electrical compartment unit (200), which comprises: a PCS assembly; an electrical compartment temperature control and dehumidification assembly; and an electrical compartment liquid cooling pipeline assembly; the PCS assembly comprises a plurality of stacked PCS modules (201a), and a PCS liquid inlet (201a-1) and a PCS liquid outlet (201a-2) arranged on the PCS modules (201a); the electrical compartment temperature control and dehumidification assembly comprises: an electrical compartment evaporator (202a), on which a second refrigerant inlet (202a-1) and a second refrigerant outlet (202a-2) are arranged; the electrical compartment liquid cooling pipeline assembly comprises a second liquid supply main line (203a) and a second liquid return main line (203d), wherein the second liquid supply main line (203a) is connected to the second refrigerant inlet (202a-1) and the second refrigerant outlet (202a-2). The PCS liquid inlet (201a-1) is connected, and the second liquid return main line (203d) is connected to the PCS liquid outlet (201a-2); the electrical compartment cold circulation loop (302a) is also connected in series with a second circulation pump (302a-1), a second heater (302a-3), a second liquid supply temperature sensor (302a-5), a cold circulation loop liquid supply port (302a-11) in the electrical compartment, and a cold circulation loop liquid return port (302a-12) in the electrical compartment; the cold circulation loop liquid supply port (302a-11) in the electrical compartment is connected to the second liquid supply main line (203a), and the cold circulation loop liquid return port (302a-12) in the electrical compartment is connected to the second liquid return main line (203d). The battery compartment liquid cooling temperature control component further comprises: a fluorine system external cooling cycle first loop (301c), on which a second drying filter (301c-1) is connected in series; a fluorine system external cooling cycle first branch loop (301d), on which a first electronic expansion valve (301d-1) and a first check valve (301d-2) are connected in series; a fluorine system external cooling cycle second branch loop (301e), on which a second electronic expansion valve (301e-1) and a second check valve (301e-2) are connected in series, the fluorine system external cooling cycle first loop (301c), the fluorine system external cooling cycle first branch loop (301d), and the fluorine system external cooling cycle second branch loop (301e) are connected in parallel to the fluorine system external cooling cycle main loop ( 301b), the first branch circuit (301d) of the fluorine system external cooling cycle is connected to the first refrigerant inlet (103a-1) and the first refrigerant outlet (103a-2); the second branch circuit (301e) of the fluorine system external cooling cycle is connected to the second refrigerant inlet (202a-1) and the second refrigerant outlet (202a-2); the electrical cabin liquid cooling pipeline assembly also includes: a plurality of second liquid supply secondary pipelines (203b) connected to the second liquid supply main pipeline (203a), a plurality of second liquid supply branch pipelines (203c) connected to the second liquid supply secondary pipeline (203b), and the second liquid supply branch pipeline (203c) is connected to the PCS liquid inlet (201a-1);A plurality of second liquid return secondary pipelines (203e) connected to the second liquid return main pipeline (203d), a plurality of second liquid return branch pipelines (203f) connected to the second liquid return secondary pipeline (203e), the second liquid return branch pipeline (203f) being connected to the PCS liquid outlet (201a-2); and a second exhaust valve (203g) disposed on the top pipe of the second liquid return secondary pipeline (203e). ; 5. The thermal management device according to claim 1 or 3, characterized in that: The temperature control cabin unit (300) further includes a waste heat recovery component, which includes: A second plate heat exchanger (305a) is provided with a first pair of liquid inlets and a liquid outlet, and a second pair of liquid inlets and a liquid outlet; A battery-side waste heat recovery liquid inlet pipeline (305b), on which a third solenoid valve (305b-1) is arranged; A battery-side waste heat recovery liquid return pipeline (305c), on which a third check valve (305c-1) is provided; An electrical side waste heat recovery liquid inlet pipeline (305d), on which a fourth solenoid valve (305d-1) is arranged; An electrical side waste heat recovery liquid return pipeline (305e), on which a fourth check valve (305e-1) is provided; A cold circulation loop (302a) in the electrical compartment is also connected in series with a second circulation pump (302a-1). The working mode of the thermal management device includes a ninth working mode. When in the ninth working mode, the third solenoid valve (305b-1) is opened, the fourth solenoid valve (305d-1) is opened, the second electric three-way valve (302a-2) is opened at 90 degrees, the first circulation pump (301a-1) is started, the second circulation pump (302a-1) is started, the cold circulation loop (301a) in the battery compartment and the cold circulation loop (302a) in the electrical compartment exchange heat through the second plate heat exchanger (305a), and the heat generated by the PCS module during operation is used to heat the battery cell.

6. The thermal management device according to claim 1, characterized in that: The temperature control cabin unit (300) further includes a fluid replenishment component, which includes: A liquid replenishing tank (304a), the bottom of which is provided with a drain valve (304a-1); Fluid replenishment pump (304b); A battery compartment liquid replenishment branch (304c), to which a fifth check valve (304c-1) and a fifth solenoid valve (304c-2) are connected in series; An electrical compartment liquid replenishment branch (304d), on which a sixth check valve (304d-1) and a sixth solenoid valve (304d-2) are connected in series; The battery compartment liquid replenishment branch (304c) is connected to the cold circulation circuit (301a) in the battery compartment, and the electrical compartment liquid replenishment branch (304d) is connected to the electrical compartment liquid cooling temperature control component (302a); The working mode includes a tenth working mode. When in the tenth working mode, the cold circulation loop (301a) in the battery compartment includes a first liquid return pressure sensor (301a-8). When the sampling value of the first liquid return pressure sensor (301a-8) is lower than a first set value, the fifth solenoid valve (304c-2) is opened, and the liquid replenishment pump (304b) is started to replenish the coolant in the liquid replenishment tank (304a) into the cold circulation loop (301a) in the battery compartment. When the sampling value of the first liquid return pressure sensor (301a-8) reaches a second set value, the fifth solenoid valve (304c-2) is closed, and the liquid replenishment pump (304b) is started. 04b) is shut down, and the refilling is completed; the cold circulation loop (302a) in the electrical compartment includes a second return liquid pressure sensor (302a-8); when the sampling value of the second return liquid pressure sensor (302a-8) is lower than the first set value, the sixth solenoid valve (304d-2) is opened, and the refilling pump (304b) is started to replenish the coolant in the refilling tank (304a) into the cold circulation loop (302a) in the electrical compartment; when the sampling value of the second return liquid pressure sensor (302a-8) reaches the second set value, the sixth solenoid valve (304d-2) is closed, the refilling pump (304b) is shut down, and the refilling is completed.

7. The thermal management device according to claim 1, characterized in that: Its working modes include a first working mode. When in the first working mode, the second solenoid valve (303c-2) is opened, the opening degree of the first electric three-way valve (301a-2) is between 0° and 90°, the coolant in the cold circulation loop (301a) in the battery compartment flows through the first plate heat exchanger (301f) and the second air cooler (302c-4) at the same time, and mixed secondary heat exchange is performed through the fluorine system external cold circulation main loop (301b) and the second air cooler (302c-4); the liquid inlet solenoid valve (302c-2) is closed, the liquid outlet solenoid valve (302c-3) is closed, the opening degree of the second electric three-way valve (302a-2) is 0°, and the coolant in the cold circulation loop (302a) in the electrical compartment all flows through the first air cooler (302c-1) for secondary heat exchange.

8. The thermal management device according to claim 1, characterized in that: Its working mode includes a second working mode. When in the second working mode, the second solenoid valve (303c-2) is closed, the first electric three-way valve (301a-2) is opened at 0°, and the coolant in the cold circulation circuit (301a) in the battery compartment all flows through the first plate heat exchanger (301f), and performs secondary heat exchange through the fluorine system external cold circulation main circuit (301b); the liquid inlet solenoid valve (302c-2) is opened, the liquid outlet solenoid valve (302c-3) is opened, the second electric three-way valve (302a-2) is opened at 0°, and the coolant in the cold circulation circuit (302a) in the electrical compartment all flows through the natural external cold circulation circuit (302c), and performs secondary heat exchange through the first air cooler (302c-1) and the second air cooler (302c-4).

9. The thermal management device according to claim 1, characterized in that: Its working mode includes a third working mode. When in the third working mode, the second solenoid valve (303c-2) is opened, the first electric three-way valve (301a-2) is opened at 90°, the liquid inlet solenoid valve (302c-2) is closed, the liquid outlet solenoid valve (302c-3) is closed, and the cooling liquid in the cold circulation loop (301a) in the battery compartment all flows through the natural cold source switching pipeline 303c, and performs secondary heat exchange through the second air cooler (302c-4); the second electric three-way valve (302a-2) is opened at 0°, and the cooling liquid in the cold circulation loop (302a) in the electrical compartment all flows through the first air cooler (302c-1) for secondary heat exchange.

10. The thermal management device according to claim 3, characterized in that: Its working mode includes a fourth working mode. When in the fourth working mode, the second solenoid valve (303c-2) is closed, the first solenoid valve (301b-4) is closed, the first circulation pump (301a-1) is started, and the first heater (301a-3) is turned on for heating.

11. The thermal management device according to claim 4, characterized in that: Its working mode includes a fifth working mode. When in the fifth working mode, the second solenoid valve (303c-2) is closed, the second circulation pump (302a-1) is started, the second heater (302a-3) is turned on for heating, and the second electric three-way valve (302a-2) is opened by 90°.

12. The thermal management device according to claim 4, characterized in that: Its working mode includes a sixth working mode. When in the sixth working mode, the opening degree of the second electric three-way valve (302a-2) changes with the sampling value of the second liquid supply temperature sensor (302a-5), only part of the coolant flows through the natural external cooling circulation loop (302c), and the second heater (302a-3) starts / stops heating according to the sampling value of the second liquid supply temperature sensor (302a-5).

13. The thermal management device according to claim 3, characterized in that: The battery compartment liquid cooling temperature control component also includes: a first branch circuit (301d) of a fluorine system external cooling cycle, to which a first electronic expansion valve (301d-1) is connected in series, and the working mode of the thermal management device includes a seventh working mode. When in the seventh working mode, the compressor (301b-2) is started, the condenser (301b-3) is started, the first solenoid valve (301b-4) is opened, the battery compartment evaporator (103a) is opened, and the first electronic expansion valve (301d-1) is opened.

14. The thermal management device according to claim 3, characterized in that: The thermal management device also includes an electrical compartment unit (200), which includes an electrical compartment temperature control and dehumidification component, the electrical compartment temperature control and dehumidification component includes: an electrical compartment evaporator (202a), the battery compartment liquid cooling temperature control component also includes a second branch circuit (301e) of the fluorine system external cooling cycle, to which a second electronic expansion valve (301e-1) is connected in series, and the working mode of the thermal management device includes an eighth working mode. When in the eighth working mode, the compressor (301b-2) is started, the condenser (301b-3) is started, the first solenoid valve (301b-4) is opened, the electrical compartment evaporator (202a) is opened, and the second electronic expansion valve (301e-1) is opened.

15. An energy storage system, characterized in that: A thermal management device comprising any one of claims 1-14.

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