Energy storage temperature control system and energy storage device

Abstract

The utility model discloses an energy storage temperature control system and an energy storage device, and the energy storage temperature control system comprises a press module which is formed by connecting a compressor, a four-way valve, a condenser, a liquid storage device and a heat regenerator through pipelines; the battery cell temperature adjusting module is connected to the liquid storage device and the four-way valve; the fluorine pump module is connected in parallel between the liquid storage device and the battery cell temperature adjusting module; in the fluorine pump refrigerating and heating mode, the condenser, the liquid storage device, the fluorine pump module and the battery cell temperature adjusting module are connected to form a fluorine pump refrigerant circulation loop; in a linkage refrigeration mode of the fluorine pump and the press, the press module, the fluorine pump module and the battery cell temperature adjusting module are connected in series to form a linkage refrigerant circulation loop; and in the refrigerating and heating mode of the press, the press module and the battery cell temperature adjusting module are connected to form a press refrigerant circulation loop. The energy storage temperature control system provided by the utility model has five different operation modes, and when the system is used, a certain refrigeration mode or heating mode can be started according to the environment temperature and the battery cell temperature, so that energy conservation is realized, and the energy efficiency of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage temperature control, and in particular to an energy storage temperature control system and an improvement of the structure of an energy storage device. Background Art

[0002] Energy storage cabinets generate a lot of heat during use. If this heat is not dissipated in time, the temperature inside the cabinet will gradually rise. When the temperature rises to a certain level, it will affect the use of the battery cabinet (such as charging and discharging performance), and there is even a risk of explosion. At the same time, when the ambient temperature is too low, such as in winter, the low temperature environment will also cause the battery to lose power seriously, cannot charge and discharge normally, and shorten its life. Therefore, energy storage cabinets are usually equipped with refrigeration units to cool the batteries and control the battery temperature within an appropriate range.

[0003] The main heat dissipation method of existing energy storage cabinets is to control the temperature of lithium-ion batteries through liquid cooling units. After the refrigeration system converts heat into cold, it undergoes secondary heat exchange in the water system, and uses the outlet water temperature of 18°C ​​as the control target to cool or heat the lithium battery liquid cooling plate. The heating and cooling rates are slow, the energy conversion efficiency is very low, the system cost is high, and the energy efficiency is low.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] In response to the problems pointed out in the background technology, the utility model proposes an energy storage temperature control system, which has five different operating modes. When in use, a cooling mode or heating mode can be turned on according to the ambient temperature and the battery cell temperature to match the ambient temperature, thereby achieving battery cell temperature regulation, saving energy, and improving the energy efficiency of the system.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0007] In some embodiments of the present application, an energy storage temperature control system is provided, including:

[0008] A compressor module is formed by connecting a compressor, a four-way valve, a condenser, a liquid receiver and a regenerator through pipelines;

[0009] The battery cell temperature control module is used to control the temperature of the battery cell. One end is connected to the liquid reservoir, and the other end is provided with two shunt branches, one of which is connected between the condenser and the four-way valve, and the other is connected to the four-way valve.

[0010] A control component is arranged on a flow branch connected to a position between the condenser and the four-way valve;

[0011] The fluorine pump module is connected in parallel to the pipeline section between the liquid reservoir and the battery cell temperature control module through a bypass branch;

[0012] The energy storage temperature control system has fluorine pump cooling and heating mode, fluorine pump and compressor linkage cooling mode and compressor cooling and heating mode;

[0013] Among them, when in the fluorine pump cooling and heating mode, the control component is turned on, and the condenser, liquid storage, fluorine pump module, and battery cell temperature control module are connected to form a fluorine pump refrigerant circulation loop;

[0014] When in the fluorine pump and compressor linkage refrigeration mode: the compressor module, fluorine pump module, and battery cell temperature control module are connected in series to form a linkage refrigerant circulation loop;

[0015] When in the compressor cooling and heating mode, the compressor module and the battery cell temperature control module are connected to form a compressor refrigerant circulation loop.

[0016] In some embodiments of the present application, the battery cell temperature control module includes: a battery cell refrigerant pipeline, which is provided with a plurality of pipelines arranged in parallel, and each battery cell refrigerant pipeline is connected to the liquid reservoir at one end and to the four-way valve at the other end;

[0017] And a plurality of battery core direct cooling components are provided and are respectively connected to the plurality of battery core refrigerant pipelines.

[0018] In some embodiments of the present application, it also includes:

[0019] A first electronic expansion valve is arranged on one side of the battery core direct cooling component;

[0020] and a first temperature detection sensor, arranged on the same side as the first electronic expansion valve;

[0021] The second electronic expansion valve is arranged on the other side of the battery core refrigeration component.

[0022] The second temperature detection sensor is arranged on the same side as the second electronic expansion valve.

[0023] In some embodiments of the present application, the fluorine pump module includes: a fluorine pump connected to the bypass branch, used to drive the circulation of the refrigerant;

[0024] and a heating component, used for heating the refrigerant flowing through the bypass branch;

[0025] A first pump body pressure detection element is arranged on the liquid inlet side of the fluorine pump;

[0026] A first pump body temperature detection element is arranged on the liquid inlet side of the fluorine pump;

[0027] The second pump body pressure detection element is arranged on the liquid outlet side of the fluorine pump.

[0028] In some embodiments of the present application, the present invention further includes: a diversion module, including:

[0029] A diverter three-way valve connected between the compressor and the four-way valve;

[0030] The shunt pipeline flows through the regenerator, one end of which is connected to the shunt three-way valve, and the other end is connected between the condenser and the four-way valve.

[0031] In some embodiments of the present application, a one-way valve is provided on the pipeline between the battery cell temperature regulating module and the liquid reservoir;

[0032] The battery cell temperature regulating module and the liquid storage pipeline section are provided with parallel pipelines connected in parallel therewith, and an electric control valve is provided on the parallel pipelines.

[0033] In some embodiments of the present application, the fluorine pump cooling and heating mode includes: a fluorine pump cooling mode and a fluorine pump heating mode;

[0034] When the fluorine pump refrigeration mode is in operation, the refrigerant is pumped out from the liquid reservoir by the fluorine pump, flows through the battery cell direct cooling component to absorb heat to cool the battery cell, and then flows back to the condenser;

[0035] When the fluorine pump heating mode is in operation, the refrigerant is pumped from the liquid storage tank by the fluorine pump, and after being heated by the heating component, reaches the battery cell direct cooling component to release heat to heat the battery cell and then flows back to the condenser.

[0036] In some embodiments of the present application, when the fluorine pump and the compressor are in linkage refrigeration mode, the refrigerant flows out of the compressor, flows through the condenser, the liquid reservoir, the fluorine pump, the battery temperature control module, and the four-way valve in sequence and flows back to the compressor;

[0037] Among them, the fluorine pump is used to accelerate the flow rate of the refrigerant in the refrigerant circulation loop of the fluorine pump compressor.

[0038] In some embodiments of the present application, it further includes: an oil separation circuit, wherein an oil return capillary is provided on the oil separation circuit;

[0039] and an oil separator connected between the compressor and the four-way valve;

[0040] One end of the oil separation circuit is connected to the suction side of the compressor, and the other end is connected to the oil separator.

[0041] An energy storage device, comprising:

[0042] A cabinet body, wherein an air conditioning compartment is formed inside the cabinet body;

[0043] and a plurality of battery compartments arranged below the air conditioning compartment, wherein the plurality of battery compartments are arranged up and down along the height direction of the cabinet;

[0044] It also includes the energy storage device described in the above technical solution.

[0045] Compared with the prior art, the advantages and positive effects of the utility model are:

[0046] The energy storage temperature control system proposed in the utility model has five different usage modes, namely, compressor cooling mode, fluorine pump cooling module, fluorine pump and compressor linkage cooling mode, compressor heating mode, and fluorine pump heating mode, by means of the cooperation of the fluorine pump module and the compressor module dual drive module.

[0047] When the battery cell needs to be cooled and dissipated, one of the refrigeration modes, including the compressor refrigeration mode, the fluorine pump refrigeration module, and the compressor fluorine pump linkage refrigeration mode, can be controlled to start according to the actual detected ambient temperature value. By matching the three refrigeration modes with the ambient temperature, the appropriate start-up mode is selected according to the ambient temperature to achieve energy saving and improve system energy efficiency.

[0048] When the battery cell needs to be heated up, the compressor heating mode and one of the heating modes in the fluorine pump heating module can be controlled to start according to the actual detected ambient temperature value.

[0049] It can not only meet the high energy efficiency of heating under low external ring temperature, but also achieve high reliability of heating under ultra-low external ring temperature conditions.

[0050] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0052] Figure 1 is an overall flow chart of the energy storage temperature control system according to an embodiment;

[0053] Figure 2 is a flow chart of an energy storage temperature control system in a compressor cooling mode according to an embodiment;

[0054] Figure 3 is a flow chart of the energy storage temperature control system in the fluorine pump refrigeration mode according to the embodiment;

[0055] Figure 4 It is a flow chart of the energy storage temperature control system in the compressor and fluorine pump linkage refrigeration mode according to the embodiment;

[0056] Figure 5 is a flow chart of an energy storage temperature control system in a compressor heating mode according to an embodiment;

[0057] Figure 6 is a flow chart of the energy storage temperature control system in the fluorine pump heating mode according to the embodiment;

[0058] Figure 7 A diagram showing the coordination structure of a battery cell direct cooling component and a battery cell of an energy storage temperature control system according to an embodiment;

[0059] Figure 8 It is a structural exploded view of a battery cell direct cooling component of an energy storage temperature control system according to an embodiment;

[0060] Fig. 9 The structure of the energy storage cabinet according to the embodiment is shown in FIG. Figure 1 ;

[0061] Fig.10 The structure of the energy storage cabinet according to the embodiment is shown in FIG. Figure 2 .

[0062] Reference numerals:

[0063] 100, compressor module; 110, compressor; 120, four-way valve; 130, condenser; 140, liquid storage; 150, regenerator; 200, battery cell temperature control module; 210, battery cell refrigerant pipeline; 211, shunt branch; 220, battery cell direct cooling component; 221, upper cover; 222, bottom plate; 223, refrigerant flow channel; 230, first electronic expansion valve; 240, first temperature detection sensor; 250, second electronic expansion valve; 260, second temperature detection sensor; 270, control component ; 300, fluorine pump module; 310, fluorine pump; 320, heating component; 330, first pump body pressure detection element; 340, first pump body temperature detection element; 350, second pump body pressure detection element; 400, diversion module; 410, diversion three-way valve; 420, diversion pipeline; 510, one-way valve; 520, parallel pipeline; 530, electric control valve; 610, oil separation circuit; 620, return oil capillary; 630, oil separator; 700, cabinet; 710, battery compartment; 720, air conditioning compartment. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0065] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0066] 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 this application, unless otherwise specified, "plurality" means two or more.

[0067] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0069] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0070] In some embodiments of the present application, an energy storage temperature control system is provided for regulating the temperature of cells of energy storage batteries stored in an energy storage cabinet.

[0071] The temperature control and regulation of the energy storage battery includes cooling and heat dissipation regulation and heating and temperature rise regulation of the battery cells. By cooling and heating the battery cells, the battery cells are kept within the standard temperature range to ensure that they can perform normal charging and discharging operations.

[0072] The energy storage temperature control system includes:

[0073] The compressor module 100 is formed by connecting a compressor 110, a four-way valve 120, a condenser 130, a liquid storage tank 140 and a regenerator 150 through pipelines;

[0074] The compressor module 100 is a main refrigeration module, which drives the refrigerant to circulate through the refrigerant heat exchange through the operation of the compressor 110 to achieve the effect of cooling or heating.

[0075] The battery cell temperature control module 200 is used to control the temperature of the battery cell, and the temperature control of the battery cell includes temperature increase control of the battery cell and temperature decrease control of the battery cell.

[0076] One end of the battery cell temperature control module 200 is connected to the liquid reservoir, and the other end is connected between the condenser and the four-way valve and to the four-way valve.

[0077] The other end of the cell temperature control module 200 is provided with two shunt branches 211, one of which is connected between the condenser and the four-way valve, and the other is connected to the four-way valve;

[0078] The control component 270 is arranged on the shunt branch 211 at a position connected between the condenser and the four-way valve, and performs opening and closing control on the shunt branch 211.

[0079] The control component 270 may be an electric ball valve.

[0080] In order to enhance the condensation effect, a condensation fan is provided on the condenser 130 to drive the air flow.

[0081] An ambient temperature sensor for detecting ambient temperature is also provided on the condenser 130 side to detect the ambient temperature value.

[0082] In some embodiments of the present application, a bypass branch connected in parallel with the liquid reservoir 140 and the battery cell temperature control module 200 is provided at the pipeline section.

[0083] In some embodiments of the present application, a fluorine pump module 300 is provided on the bypass branch, and the fluorine pump module 300 can provide power for the circulation of the refrigerant.

[0084] Specifically, the bypass branch is connected in parallel to the pipeline section between the liquid reservoir 140 and the battery cell temperature regulating module 200 so that the refrigerant flowing out of the liquid reservoir 140 can have different flow directions.

[0085] The refrigerant condensed by the condenser 130 can directly enter the battery cell temperature control module 200 through the liquid storage 140;

[0086] The refrigerant entering the liquid storage tank 140 may also pass through a bypass branch connected in parallel therewith, and then enter the battery cell temperature control module 200 after passing through the fluorine pump module 300 on the bypass branch.

[0087] When the refrigerant flowing out of the liquid storage tank 140 does not pass through the fluorine pump module 300, the entire system can be driven only by the compressor module 100;

[0088] When the refrigerant flowing out of the liquid storage tank 140 passes through the fluorine pump module 300 , the compressor module 100 and the fluorine pump module 300 may be jointly driven, or the fluorine pump module 300 may be used as a driver to drive the entire system to operate.

[0089] Since two drive modules, the fluorine pump module 300 and the compressor module 100, are arranged, the entire energy storage temperature control system can select the compressor module 100 as a drive according to the actual ambient temperature requirements when in use, and drive the refrigerant flow through the battery cell temperature control module 200 to control the temperature of the battery cell;

[0090] Alternatively, the fluorine pump module 300 is used to utilize the refrigerant stored in the liquid storage tank 140 condensed by the condenser 130 to enter the battery cell temperature control module 200 to control the temperature of the battery cell.

[0091] Specifically, the energy storage temperature control system has a fluorine pump cooling and heating mode, a fluorine pump and compressor linkage cooling mode, and a compressor cooling and heating mode;

[0092] When the fluorine pump is in cooling and heating mode, the control component 270 is turned on, and the condenser 130, the liquid reservoir 140, the fluorine pump module 300, and the battery cell temperature control module 200 are connected to form a fluorine pump refrigerant circulation loop;

[0093] At this time, the refrigerant circulates in the fluorine pump refrigerant circulation loop composed of the condenser 130, the liquid storage tank 140, the fluorine pump module 300, the battery cell temperature control module 200, and the control components. The refrigerant does not flow through the four-way valve 120 at this time, and the compressor 110 and the four-way valve 120 do not need to be started to participate in the cooling and heating cycle.

[0094] The fluorine pump module 300 operates independently to provide power for the flow of refrigerant, driving the refrigerant to flow in the refrigerant circulation loop of the fluorine pump 310, and to perform temperature regulation control for heating or cooling when the refrigerant flows through the battery cell temperature control module 200.

[0095] When in the fluorine pump and compressor linkage refrigeration mode: the compressor module, the fluorine pump module 300, and the battery cell temperature control module 200 are connected in series to form a linkage refrigerant circulation loop.

[0096] When in the fluorine pump and compressor linkage refrigeration mode, the fluorine pump 310 and the compressor 110 are started simultaneously, that is, the fluorine pump module 300 and the compressor module 100 operate jointly to perform refrigeration.

[0097] When the refrigeration mode of the fluorine pump and compressor linkage is started, the refrigerant flows out of the condenser 130 and flows through the fluorine pump module 300, and the circulation of the refrigerant is further accelerated by the fluorine pump module 300, and then enters the battery cell cooling module for cooling and heat dissipation, and finally flows back to the four-way valve 120 and the heat regenerator 150 to reach the compressor 110.

[0098] When in the compressor cooling and heating mode, the control component 270 is closed, and the battery cell temperature control module 200 is connected to the condenser 130 and the four-way valve 120 .

[0099] When the compressor cooling and heating mode is started, the fluorine pump module 300 does not participate in the cooling and heating cycle, but only circulates through the compressor module 100 to drive the refrigerant to flow to the battery cell temperature control module 200 for temperature control.

[0100] In some embodiments of the present application, the fluorine pump cooling and heating mode includes: a fluorine pump cooling mode and a fluorine pump heating mode, wherein the flow direction of the refrigerant in the fluorine pump cooling mode is opposite to the flow direction of the refrigerant in the fluorine pump 310 heating mode.

[0101] In some embodiments of the present application, the compressor cooling and heating mode includes a compressor cooling mode and a compressor heating mode, wherein the flow direction of the refrigerant in the compressor cooling mode is opposite to the flow direction of the refrigerant in the compressor heating mode.

[0102] The energy storage temperature control system can drive the refrigerant to the battery cell temperature control module 200 to absorb or release heat through the compressor module 100 and the fluorine pump module 300. It can not only cool down and dissipate heat for the battery cell when the ambient temperature is high and the battery cell temperature is high, but also heat up the battery cell when the ambient temperature is low and the battery cell temperature is low, so that the temperature of the battery cell can be guaranteed to be within the standard temperature range, thereby realizing the regulation and control of the battery cell temperature and ensuring the normal use of the battery cell.

[0103] The energy storage temperature control system has five different usage modes through the cooperation of the dual drive modules of the fluorine pump module 300 and the compressor module 100, namely, compressor cooling mode, fluorine pump cooling mode, fluorine pump and compressor linkage cooling mode, compressor heating mode, and fluorine pump heating mode.

[0104] When the battery cell needs to be cooled and dissipated, one of the cooling modes including the compressor cooling mode, the fluorine pump cooling mode and the compressor-fluorine pump linkage cooling mode can be controlled to start according to the actually detected ambient temperature value.

[0105] If the ambient temperature is detected to be high, the compressor cooling mode can be controlled to start.

[0106] When the ambient temperature is detected to be at a medium temperature, the compressor module and the fluorine pump module 300 can be controlled to be turned on to achieve linkage refrigeration;

[0107] When the ambient temperature is detected to be low, the fluorine pump module 300 can be controlled to start cooling alone. By matching the three cooling modes with the ambient temperature, a suitable start mode is selected according to the ambient temperature to achieve energy saving and improve system energy efficiency.

[0108] When the battery cell needs to be heated, one of the heating modes, the compressor heating mode and the fluorine pump heating mode, can be controlled to start according to the actual detected ambient temperature value.

[0109] During heating, the compressor module 100 can be used for heating or the fluorine pump module 300 can be used for heating according to the outdoor ambient temperature.

[0110] For example, when the ambient temperature is detected to be medium, a compressor is used for heating;

[0111] When the ambient temperature is detected to be low, the fluorine pump heating method can be used to meet the high energy efficiency of heating under low external ring temperature, and also to achieve high reliability of heating under ultra-low external ring temperature conditions.

[0112] In some embodiments of the present application, the battery cell temperature control module 200 includes: a battery cell refrigerant pipeline 210, which is provided with multiple lines and arranged in parallel, and each battery cell refrigerant pipeline 210 is connected to the liquid reservoir 140 at one end and connected to the four-way valve 120 or connected to the pipeline between the four-way valve and the condenser at the other end, so that when the compressor module 100 and the fluorine pump module 300 are started respectively, the battery cell temperature control module 200 can be optionally connected to the fluorine pump module 300 or the compressor module 100.

[0113] And a plurality of battery core direct cooling components 220 are provided and are respectively connected to the plurality of battery core refrigerant pipelines 210 .

[0114] In some embodiments of the present application, the battery cell direct cooling component 220 is a battery cell direct cooling plate.

[0115] In some embodiments of the present application, the battery core direct cooling plate includes an upper cover and a bottom plate.

[0116] The upper cover 221 is buckled on the bottom plate 222 and surrounds the bottom plate to form a refrigerant flow channel 223 .

[0117] The cooling medium channel 223 is evenly bent and arranged between the bottom plate and the upper cover to evenly cool or heat the battery cells.

[0118] The refrigerant enters the refrigerant flow channel, flows along the refrigerant flow channel 223 and evaporates to absorb or release heat, so as to achieve temperature regulation of the battery cells in contact with it by cooling or heating them.

[0119] The energy storage temperature control system is mainly used to control the temperature of the storage batteries stored in the energy storage cabinet. When the energy storage cabinet is arranged, in order to place multiple energy storage batteries, multiple battery compartments 710 are set on the cabinet body 700, and the multiple battery compartments 710 are arranged from top to bottom.

[0120] Energy storage batteries are placed correspondingly in the multiple battery compartments 710, and the battery cells are the main heat-generating components of the energy storage batteries.

[0121] In order to achieve temperature adjustment for multiple battery cells at one time, a plurality of battery cell refrigerant pipelines 210 are provided and arranged side by side, and a battery cell direct cooling component 220 is separately arranged on each battery cell refrigerant pipeline 210 .

[0122] Taking cooling as an example, after the refrigerant flows out of the liquid storage tank 140, it will be diverted to multiple parallel battery cell refrigerant pipelines 210. The refrigerant flow diverted to the multiple battery cell refrigerant pipelines 210 evaporates and absorbs heat when passing through the battery cell direct cooling component 220 located on the pipeline, thereby achieving a cooling and heat dissipation effect on the battery cell in contact with the battery cell direct cooling component 220.

[0123] The refrigerant is shunted to a plurality of parallel-connected battery cell refrigerant pipelines 210 and individually dissipated through the battery cell direct cooling components 220 configured at each battery cell refrigerant pipeline 210, thereby ensuring that the heat dissipation of the battery cells of each energy storage battery is independent and will not interfere with each other;

[0124] The refrigerant is diverted to the multiple battery core direct cooling components 220 in the multiple battery core refrigerant pipelines 210 at one time to dissipate heat simultaneously, thereby achieving the heat dissipation of multiple battery cores at one time and improving the heat dissipation efficiency.

[0125] In some embodiments of the present application, the energy storage temperature control system includes:

[0126] A first electronic expansion valve 230 is arranged on one side of the battery core direct cooling component 220;

[0127] and a first temperature detection sensor 240 , arranged on the same side as the first electronic expansion valve 230 ;

[0128] The second electronic expansion valve 250 is arranged on the other side of the battery core refrigeration component.

[0129] The second temperature detection sensor 260 is arranged on the same side as the second electronic expansion valve 250 .

[0130] The first electronic expansion valve 230 and the second electronic expansion valve 250 are respectively arranged on the cell refrigerant pipeline 210 at both sides of the cell direct cooling component 220 .

[0131] When the refrigerant flows, the refrigerant entering the battery cell direct cooling component 220 can be throttled and reduced in pressure by adjusting the opening of the first electronic expansion valve 230, and the temperature of the refrigerant flowing out of the battery cell direct cooling component 220 can be controlled by adjusting the opening of the second electronic expansion valve 250.

[0132] The first temperature detection sensor 240 and the second temperature detection sensor 260 cooperate to detect the temperature of the coolant before flowing into the battery cell direct cooling component 220 and the temperature of the coolant after flowing out of the battery cell direct cooling component 220 .

[0133] In some embodiments of the present application, a first pressure detection sensor and a second pressure detection sensor are further provided on the battery cell refrigerant pipeline 210 at both sides of the battery cell direct cooling component 220 .

[0134] The pressure value of the refrigerant before flowing into the battery cell direct cooling component 220 and after flowing out of the battery cell direct cooling component 220 can be detected by the cooperation of the first pressure detection sensor and the second pressure detection sensor.

[0135] In some embodiments of the present application, the fluorine pump module 300 includes: a fluorine pump 310 connected to the bypass branch, used to drive the circulation of the refrigerant;

[0136] And a heating component 320 is used to heat the refrigerant flowing through the bypass branch.

[0137] In some embodiments, the heating component 320 is an electric heating tube, which is spirally wound on the bypass branch pipe. When powered on, it can generate heat and transfer the heat to the refrigerant flowing through the bypass branch to achieve the conversion of the refrigerant from liquid to gas.

[0138] In some embodiments, the heating component 320 is an electric heating sheet or an electric heating plate, which wraps around the bypass branch to achieve the effect of transferring heat to the refrigerant flowing through the bypass branch after it is powered on for heating.

[0139] A first pump body pressure detection element 330 is arranged at the liquid inlet side of the fluorine pump 310;

[0140] A first pump body temperature detection element 340 is arranged at the liquid inlet side of the fluorine pump 310;

[0141] The refrigerant pressure before entering the fluorine pump 310 can be detected by the first pump body pressure detection element 330 , and the refrigerant temperature before entering the fluorine pump 310 can be detected by the first pump body temperature detection element 340 .

[0142] The second pump body pressure detection element 350 is arranged at the liquid outlet side of the fluorine pump 310 .

[0143] The second pump body pressure detection element 350 can detect the pressure value of the refrigerant flowing out of the fluorine pump 310 .

[0144] In some embodiments of the present application, the energy storage temperature control system further includes: a shunt module 400, and the shunt module 400 includes:

[0145] A flow-dividing three-way valve 410 connected between the compressor 110 and the four-way valve 120;

[0146] The diverter three-way valve 410 has a liquid inlet, a liquid outlet and a liquid diverter port.

[0147] The bypass pipeline 420 flows through the regenerator 150 , one end of which is connected to the bypass three-way valve 410 , and the other end of which is connected between the condenser 130 and the four-way valve 120 .

[0148] When connected, the liquid inlet of the diverting three-way valve 410 is connected to the compressor 110 , and the liquid outlet is connected to the four-way valve 120 .

[0149] The liquid separation port is connected to the shunt pipe 420 . The shunt pipe 420 passes through the regenerator 150 and extends from the regenerator 150 to the front side of the liquid inlet of the condenser 130 .

[0150] Through the function of the diversion three-way valve 410 on the diversion module 400, a part of the refrigerant flowing out of the compressor 110 can be diverted, so that the diverted refrigerant flow passes through the regenerator 150 and then mixes with the refrigerant flowing out of the four-way valve 120.

[0151] When the diverted refrigerant flows through the regenerator 150 via the diverter pipe 420, it will exchange heat with the refrigerant returning from the four-way valve 120 to the regenerator 150, so as to ensure the temperature of the refrigerant on the suction pipe side returning from the regenerator 150 to the compressor 110, increase the suction temperature of the compressor 110, ensure the suction superheat, avoid liquid hammer in the compressor 110, and at the same time utilize the waste heat of condensation to achieve energy saving.

[0152] In some embodiments of the present application, a one-way valve 510 is provided on the pipeline between the battery cell temperature regulating module 200 and the liquid reservoir 140;

[0153] When the compressor 110 is in the cooling operation mode, the one-way valve 510 is opened, so that the refrigerant can only flow from the liquid reservoir 140 into the battery cell temperature control module 200 for temperature control, and cannot flow in the reverse direction.

[0154] A parallel pipeline 520 connected in parallel with the cell temperature regulating module 200 and the liquid reservoir 140 is provided on the pipeline section, and an electric control valve 530 is provided on the parallel pipeline 520, and the electric control valve is an electric ball valve.

[0155] When the compressor 110 is in the heating operation mode, the electrically controlled valve 530 may be controlled to open, so that the refrigerant enters the condenser 130 through the electrically controlled valve 530 instead of flowing in through the one-way valve 510 .

[0156] When the compressor is operated in the refrigeration mode, the one-way valve 510 is opened, and the fluorine pump module 300 and the electric control valve 530 are both kept closed.

[0157] When the compressor is operated in the heating mode, the one-way valve 510 and the fluorine pump module 300 are both kept in a closed state.

[0158] When the fluorine pump module 300 is in operation, the one-way valve 510 and the electric control valve 530 are controlled to remain closed.

[0159] In some embodiments of the present application, when the fluorine pump refrigeration mode is operated, the refrigerant is pumped from the liquid reservoir 140 by the fluorine pump 310 , flows through the battery cell direct cooling component 220 to absorb heat to cool the battery cell, and then flows back to the condenser 130 .

[0160] When the fluorine pump 310 is in the refrigeration operation mode, the condenser 130 and the liquid reservoir 140 are connected, the liquid reservoir 140 and the fluorine pump module 300 are connected, and both ends of the multiple parallel battery cell refrigerant pipelines 210 are respectively connected between the fluorine pump 310 and the condenser 130, wherein the heating component 320 in the fluorine pump module 300 is not turned on, and the one-way valve 510 and the electric control valve 530 are closed.

[0161] During the refrigeration cycle of the fluorine pump 310: the refrigerant is cooled to a supercooled liquid state in the condenser 130 and stored in the liquid storage tank 140 connected thereto through a pipeline;

[0162] The fluorine pump 310 operates to provide power for the refrigerant circulation, and the refrigerant is extracted from the liquid storage tank 140. The liquid refrigerant is transported by the fluorine pump 310 to multiple battery cell refrigerant pipelines 210. The refrigerant flow entering the battery cell direct cooling component 220 is first throttled and reduced by the first electronic expansion valve 230 to adjust the refrigerant flow. Then the refrigerant enters the battery cell direct cooling component 220 to absorb heat to cool the battery cell, and finally flows back to the condenser 130 to complete the refrigeration cycle of the fluorine pump 310.

[0163] When the fluorine pump heating mode is in operation, the refrigerant is pumped from the liquid storage tank 140 by the fluorine pump 310 , and after being heated by the heating component 320 , reaches the battery cell direct cooling component 220 to release heat to heat the battery cell, and then flows back to the condenser 130 .

[0164] When the fluorine pump is in heating operation mode, the condenser 130 is connected to the liquid reservoir 140, the liquid reservoir 140 is connected to the bypass branch, and both ends of the multiple parallel battery cell refrigerant pipelines 210 are respectively connected between the fluorine pump 310 and the condenser 130, wherein the heating component 320 in the fluorine pump module 300 is turned on; the one-way valve 510 and the electric control valve 530 are closed.

[0165] The heating cycle of the fluorine pump 310 is as follows: the refrigerant is condensed into a supercooled liquid in the condenser 130 , and then flows into the liquid storage tank 140 .

[0166] The fluorine pump 310 is in operation, and the fluorine pump 310 provides circulation power for refrigerant pressurization, driving the liquid refrigerant into the heating component 320. The heated liquid refrigerant vaporizes after being heated, and then flows through the first electronic expansion regulating flow to reduce the pressure and enter the battery cell direct cooling component 220. The refrigerant enters the battery cell direct cooling component 220 to release heat to heat the battery cell, and then enters the condenser 130 after throttling and reducing the pressure through the second electronic expansion valve 250, completing the heating cycle of the fluorine pump 310.

[0167] In some embodiments of the present application, when the fluorine pump and the compressor are in linkage refrigeration mode, the refrigerant flows out of the compressor 110, flows through the condenser 130, the liquid reservoir 140, the fluorine pump 310, the battery cell temperature control module 200, the four-way valve 120, and the regenerator 150 in sequence and flows back to the compressor 110;

[0168] The fluorine pump 310 is used to accelerate the flow rate of the refrigerant in the refrigerant circulation loop of the fluorine pump compressor.

[0169] When the fluorine pump and the compressor are operating in the linkage refrigeration mode, the electronically controlled valve 530 and the one-way valve 510 are controlled to be closed, and the heating component 320 is closed.

[0170] At this time, the fluorine pump module 300 is connected in series to the compressor module 100 to form a linked refrigerant circulation loop.

[0171] The refrigeration cycle process of the fluorine pump and compressor is as follows: the compressor 110 compresses the refrigerant into a high-temperature and high-pressure gas refrigerant, which flows through the oil separator 630 and is regulated by an electric three-way diverter valve to flow through the regenerator 150 and then mixes with the other part of the refrigerant flowing out of the compressor 110 and passing through the four-way valve 120 to enter the condenser 130 and be condensed into a high-pressure supercooled liquid refrigerant.

[0172] The fluorine pump 310 provides circulation power for the refrigerant, accelerates the flow of the refrigerant, and drives the refrigerant from the condenser 130 to enter the multiple battery cell refrigerant pipelines 210 after throttling and pressure reduction regulation by the first electronic expansion valve 230. After entering the multiple battery cell refrigerant components, the refrigerant evaporates and absorbs heat to cool the battery cells of the energy storage battery, and then flows out after passing through the second electronic expansion valve 250. The gas-liquid two-phase refrigerant flows through the four-way valve 120 and enters the regenerator 150. After complete evaporation and superheating, it enters the compressor 110 to complete the refrigeration cycle of the compressor 110.

[0173] In some embodiments of the present application, when the compressor is operating in cooling mode, the refrigerant flows from the compressor into the condenser 130 , enters the battery cell direct cooling component 220 to absorb heat to cool the battery cell, and then flows back to the compressor 110 through the regenerator 150 .

[0174] The refrigeration cycle process of the compressor 110 is as follows: the refrigerant is compressed by the compressor 110 into a high-temperature and high-pressure gas refrigerant, flows through the oil separator 630, and then is regulated by the diversion three-way valve 410 to control a portion of the refrigerant to flow through the regenerator 150, and then is mixed with another portion that flows through the four-way valve 120 to enter the condenser 130 to be condensed into a high-pressure supercooled liquid refrigerant.

[0175] The refrigerant passes through the first electronic expansion valve 230 for throttling and pressure reduction, then enters the battery cell direct cooling component 220 and evaporates to absorb heat to cool the battery cell. The cooled gas-liquid two-phase refrigerant flows through the four-way valve 120 and enters the regenerator 150 to completely evaporate and superheat, then enters the compressor 110 to complete the refrigeration cycle of the compressor 110.

[0176] In some embodiments of the present application, when the compressor is operating in heating mode, the refrigerant flows from the compressor into the battery cell direct cooling component 220 to release heat to heat the battery cell and then reaches the liquid reservoir 140 and the condenser 130, and then enters the four-way valve 120 and the heat regenerator 150 from the condenser 130, and finally flows back to the compressor 110.

[0177] The heating cycle of the compressor 110 is as follows: the refrigerant is compressed by the compressor 110 into a high-temperature and high-pressure gas refrigerant, flows through the oil separator 630 and the four-way valve 120, enters the second electronic expansion valve 250 for throttling and reducing the pressure, and then enters the battery cell direct cooling component 220 to release heat, heats the battery cell, and then enters the condenser 130 for absorbing heat after throttling and reducing the pressure through the first electronic expansion valve 230, and then enters the compressor 110 through the four-way valve 120 to complete the compression heating cycle.

[0178] In some embodiments of the present application, it further includes: an oil separation circuit 610, on which an oil return capillary 620 is provided;

[0179] and an oil separator 630 connected between the compressor 110 and the four-way valve 120;

[0180] One end of the oil separation circuit 610 is connected to the suction side of the compressor 110 , and the other end is connected to the oil separator 630 . The refrigerant flowing out of the compressor 110 can be processed for oil separation through the oil separator 630 .

[0181] The refrigerant discharged from the compressor 110 passes through the oil separator 630 , then passes through the oil separation circuit 610 and the oil return capillary 620 and then flows back into the compressor 110 .

[0182] In some embodiments of the present application, an energy storage device is provided, comprising:

[0183] A cabinet 700, wherein an air conditioning compartment 720 is formed inside the cabinet;

[0184] and a plurality of battery compartments 710 arranged below the air conditioning compartment, wherein the plurality of battery compartments 710 are arranged up and down along the height direction of the cabinet;

[0185] It also includes the energy storage temperature control system described in the above technical solution.

[0186] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0187] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An energy storage temperature control system, characterized in that: Included are: The compressor module is formed by connecting a compressor, a four-way valve, a condenser, a liquid receiver and a regenerator through pipelines; The cell temperature control module is used to control the temperature of the cell, one end of which is connected to the liquid reservoir, and the other end is provided with two shunt branches, one of which is connected between the condenser and the four-way valve, and the other is connected to the four-way valve; A control component is arranged on a flow branch connected to a position between the condenser and the four-way valve; The fluorine pump module is connected in parallel to the pipeline section between the liquid reservoir and the battery cell temperature control module; The energy storage temperature control system has fluorine pump cooling and heating mode, fluorine pump and compressor linkage cooling mode and compressor cooling and heating mode; Among them, when in the fluorine pump cooling and heating mode, the control component is turned on, and the condenser, liquid storage, fluorine pump module, and battery cell temperature control module are connected to form a fluorine pump refrigerant circulation loop; When in the fluorine pump and compressor linkage refrigeration mode: the compressor module, fluorine pump module, and battery cell temperature control module are connected in series to form a linkage refrigerant circulation loop; When in the compressor cooling and heating mode, the control component is turned off, and the compressor module and the battery cell temperature control module are connected to form a compressor refrigerant circulation loop.

2. The energy storage temperature control system according to claim 1, characterized in that: The battery cell temperature control module includes: a battery cell refrigerant pipeline, which is provided with a plurality of pipelines arranged in parallel, and each battery cell refrigerant pipeline is connected to the liquid reservoir at one end and to the four-way valve at the other end or is connected between the condenser and the four-way valve; And a plurality of battery core direct cooling components are provided and are respectively connected to the plurality of battery core refrigerant pipelines.

3. The energy storage temperature control system according to claim 2, characterized in that: Also included are: A first electronic expansion valve is arranged on one side of the battery core direct cooling component; and a first temperature detection sensor, arranged on the same side as the first electronic expansion valve; The second electronic expansion valve is arranged on the other side of the battery core refrigeration component. The second temperature detection sensor is arranged on the same side as the second electronic expansion valve.

4. The energy storage temperature control system according to claim 1, characterized in that: The fluorine pump module comprises: a bypass branch; and a fluorine pump connected to the bypass branch, used for driving the circulation of the refrigerant; A heating component, used for heating the refrigerant flowing through the bypass branch; A first pump body pressure detection element is arranged on the liquid inlet side of the fluorine pump; A first pump body temperature detection element is arranged on the liquid inlet side of the fluorine pump; The second pump body pressure detection element is arranged on the liquid outlet side of the fluorine pump.

5. The energy storage temperature control system according to claim 1, characterized in that: Also included: diversion module, including: A diverter three-way valve connected between the compressor and the four-way valve; The shunt pipeline flows through the regenerator, one end of which is connected to the shunt three-way valve, and the other end is connected between the condenser and the four-way valve.

6. The energy storage temperature control system according to claim 1, characterized in that: A one-way valve is provided on the pipeline between the battery cell temperature regulating module and the liquid reservoir; The battery cell temperature regulating module and the liquid storage pipeline section are provided with parallel pipelines connected in parallel therewith, and an electric control valve is provided on the parallel pipelines.

7. The energy storage temperature control system according to claim 2, characterized in that: The fluorine pump cooling and heating modes include: a fluorine pump cooling mode and a fluorine pump heating mode; When the fluorine pump refrigeration mode is in operation, the refrigerant is pumped out from the liquid reservoir by the fluorine pump, flows through the battery cell direct cooling component to absorb heat to cool the battery cell, and then flows back to the condenser; When the fluorine pump heating mode is in operation, the refrigerant is pumped from the liquid storage tank by the fluorine pump, and after being heated by the heating component, reaches the battery cell direct cooling component to release heat to heat the battery cell and then flows back to the condenser.

8. The energy storage temperature control system according to claim 1, characterized in that: When the fluorine pump and compressor are operating in linkage refrigeration mode, the refrigerant flows out of the compressor, flows through the condenser, the liquid reservoir, the fluorine pump, the battery temperature control module, the four-way valve and flows back to the compressor; Among them, the fluorine pump is used to accelerate the flow rate of the refrigerant in the refrigerant circulation loop of the fluorine pump compressor.

9. The energy storage temperature control system according to claim 1, characterized in that: It also includes: an oil separation circuit, on which an oil return capillary is arranged; and an oil separator connected between the compressor and the four-way valve; One end of the oil separation circuit is connected to the suction side of the compressor, and the other end is connected to the oil separator.

10. An energy storage device, comprising: A cabinet body, wherein an air conditioning compartment is formed inside the cabinet body; and a plurality of battery compartments arranged below the air conditioning compartment, wherein the plurality of battery compartments are arranged up and down along the height direction of the cabinet; It is characterized in that It also includes the energy storage temperature control system according to any one of claims 1-9.

Images