Energy storage apparatus and electrical device

Abstract

The present application discloses an energy storage apparatus and an electrical device. The energy storage apparatus comprises a box body, a battery apparatus, and a heat exchange system. The battery apparatus is arranged in the box body, and the battery apparatus comprises a first heat exchanger and a plurality of battery cells. The first heat exchanger is used to exchange heat with the plurality of battery cells. The heat exchange system comprises a second heat exchanger and a third heat exchanger. The third heat exchanger comprises a first flow channel and a second flow channel. The first flow channel and the second flow channel are not in communication with each other and exchange heat with each other. The second heat exchanger is in communication with the first flow channel and forms a refrigerant loop for circulating a refrigerant. The first heat exchanger is in communication with the second flow channel and forms a coolant loop for circulating a coolant. In a vertical direction, at least a portion of the second heat exchanger is located above the third heat exchanger, and an outlet is disposed higher than or even with an inlet. Under the action of gravity, the refrigerant can circulate, thereby reducing the use of a compressor and reducing energy consumption.

Description

Energy storage device and electric equipment

[0001] Cross Reference to Related Applications

[0002] This application claims priority to and the benefit of the following patent applications, the contents of which are incorporated herein by reference in their entirety:

[0003] Chinese Patent Application No. 202411124276.0, filed on August 15, 2024, entitled “Energy storage device and electric equipment” with the China National Intellectual Property Administration. TECHNICAL FIELD

[0004] The present application relates to the technical field of energy storage, and in particular, to an energy storage device and electric equipment. BACKGROUND

[0005] Energy storage devices have been widely used due to their large amount of stored electrical energy. An energy storage device generally includes a box body, a heat exchange system, and a plurality of batteries. The heat exchange system and the plurality of batteries are respectively arranged in the box body. The heat exchange system exchanges heat with the plurality of batteries to stabilize the operation of the plurality of batteries.

[0006] In related technologies, the heat exchange system includes a compressor, a water pump, and a heat exchanger. The operation of the heat exchange system exchanges heat with the plurality of batteries. However, the use of the heat exchange system increases the energy consumption of the energy storage device. SUMMARY

[0007] In view of the above problems, the present application provides an energy storage device and electric equipment, which solves the problem of high energy consumption of the energy storage device.

[0008] A first aspect of the present application provides an energy storage device, comprising:

[0009] a box body;

[0010] a battery device arranged in the box body, the battery device comprising a first heat exchanger and a plurality of battery monomers, the first heat exchanger being configured to exchange heat with the plurality of battery monomers;

[0011] a heat exchange system comprising a second heat exchanger and a third heat exchanger, the third heat exchanger comprising a first flow channel and a second flow channel, the first flow channel and the second flow channel being in communication with each other and exchanging heat with each other, the second heat exchanger being in communication with the first flow channel and forming a refrigerant circuit for circulating flow of refrigerant, the first heat exchanger being in communication with the second flow channel and forming a coolant circuit for circulating flow of coolant;

[0012] wherein, in a vertical direction, at least part of the second heat exchanger is located above the third heat exchanger, an outlet of the second heat exchanger is arranged higher than an inlet of the first flow channel, or the outlet of the second heat exchanger is arranged flush with the inlet of the first flow channel.

[0013] Specifically, the refrigerant is arranged in the refrigerant circuit and is capable of circulating in the refrigerant circuit, the coolant is arranged in the coolant circuit and exchanges heat with the battery monomer through the first heat exchanger, the refrigerant exchanges heat with the air through the second heat exchanger, and the coolant exchanges heat with the refrigerant in the third heat exchanger. When the heat exchange system exchanges heat with the battery monomer, the refrigerant exchanges heat with the air at the position of the second heat exchanger, the refrigerant after heat exchange through the second heat exchanger flows into the inlet of the first flow channel of the third heat exchanger through the outlet of the second heat exchanger, the refrigerant flows along the first flow channel and exchanges heat with the coolant flowing along the second flow channel, the refrigerant flowing out of the first flow channel flows into the second heat exchanger through the inlet of the second heat exchanger to circulate, and the coolant flowing out of the first flow channel flows into the first heat exchanger and exchanges heat with the battery monomer, and the coolant after heat exchange with the battery monomer flows out of the first heat exchanger and returns to the second flow channel of the third heat exchanger to circulate.

[0014] By arranging at least part of the second heat exchanger above the third heat exchanger in the vertical direction and arranging the outlet of the second heat exchanger to be higher than the inlet of the first flow channel or to be flush with the inlet of the first flow channel, the refrigerant can flow in the refrigerant circuit under the action of gravity, thereby reducing the use of the compressor and effectively reducing the energy consumption of the energy storage device.

[0015] In some embodiments of the present application, the outlet of the second heat exchanger is arranged to be higher than the inlet of the first flow channel in the vertical direction, and there is a preset interval between the outlet of the second heat exchanger and the inlet of the first flow channel, and the heat exchange system further comprises a first pipe valve assembly, part of the first pipe valve assembly being arranged in the preset interval. Arranging the outlet of the second heat exchanger to be higher than the inlet of the first flow channel increases the difference in the vertical direction between the second heat exchanger and the third heat exchanger, thereby improving the driving force of the refrigerant flowing from the second heat exchanger to the third heat exchanger, and arranging part of the first pipe valve assembly in the preset interval can make the structure compact and effectively improve the space utilization.

[0016] In some embodiments of the present application, the preset interval has a first size in the vertical direction, and the first size is greater than or equal to 10 cm.

[0017] By arranging the first size, the second heat exchanger and the third heat exchanger have sufficient difference in the vertical direction, thereby providing sufficient driving force for the refrigerant flowing from the second heat exchanger to the third heat exchanger, so that the refrigerant can effectively circulate in the refrigerant circuit, thereby effectively achieving heat exchange with the battery monomer.

[0018] In some embodiments of the present application, the first pipe valve assembly comprises:

[0019] The first pipeline has one end connected with the outlet of the second heat exchanger and the other end connected with the inlet of the first flow channel, and is arranged in the preset interval.

[0020] The second pipeline has one end connected with the inlet of the second heat exchanger and the other end connected with the outlet of the first flow channel, and is arranged outside the preset interval.

[0021] The first pipeline and the second pipeline are arranged to realize effective communication between the second heat exchanger and the third heat exchanger, thereby meeting the circulation requirement of the refrigerant, and the first pipeline is arranged in the preset interval, so that the overall structure is compact, thereby improving the space utilization.

[0022] In some embodiments of the present application, the first pipe valve assembly further comprises a first control valve arranged on the first pipeline and used for controlling the opening degree of the first pipeline, or the first control valve is arranged on the second pipeline and used for controlling the opening degree of the second pipeline. The first control valve is arranged on the first pipeline or the second pipeline, and by adjusting the first control valve, the control of the first pipeline or the second pipeline can be realized, and the effective adjustment of the refrigerant flow can be realized.

[0023] In some embodiments of the present application, the first pipe valve assembly further comprises a one-way valve arranged on the first pipeline and configured to be one-way conducted from the second heat exchanger to the third heat exchanger, or the one-way valve is arranged on the second pipeline and configured to be one-way conducted from the third heat exchanger to the second heat exchanger. By arranging the one-way valve, the refrigerant after heat exchange in the second heat exchanger can flow to the third heat exchanger, reducing the backflow of the refrigerant and improving the heat exchange effect on the battery monomer.

[0024] In some embodiments of the present application, the first pipe valve assembly further comprises a first detection member arranged on the first pipeline and used for detecting the temperature and / or pressure of the refrigerant. By using the first detection member to detect at least one of the temperature and pressure of the refrigerant in the first pipeline, the current parameters of the refrigerant in the first pipeline can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0025] In some embodiments of the present application, the first pipe valve assembly further comprises a second detection member arranged on the second pipeline and used for detecting the temperature and / or pressure of the refrigerant. By using the second detection member to detect at least one of the temperature and pressure of the refrigerant in the second pipeline, the current parameters of the refrigerant in the second pipeline can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0026] In some embodiments of the present application, the first pipe valve assembly further comprises a third detection member, which is arranged outside the second heat exchanger and is used for detecting the ambient temperature. The ambient temperature is detected by the third detection member to provide data support for the control of the heat exchange system.

[0027] In some embodiments of the present application, the first pipe valve assembly further comprises a first filling valve, which is arranged on the first pipe or the second pipe and is used for filling the refrigerant. The first filling valve is arranged to supplement the refrigerant in the refrigerant circuit through the first filling valve, so that the refrigerant in the refrigerant circuit is sufficient, thereby improving the heat exchange effect on the battery monomer.

[0028] In some embodiments of the present application, the first pipe valve assembly further comprises a first exhaust valve, which is arranged on the first pipe or the second pipe and is used for exhausting the refrigerant. The first exhaust valve is arranged to exhaust the air in the refrigerant circuit by the first exhaust valve, so as to reduce the adverse effects of mixing air in the refrigerant on the heat exchange of the battery monomer.

[0029] In some embodiments of the present application, the number of the second heat exchanger and the third heat exchanger is two, the first heat exchanger is arranged in series with the second flow passages of the two third heat exchangers and forms a cooling liquid circuit, one second heat exchanger is connected with the first flow passage of one third heat exchanger and forms one refrigerant circuit, and the other second heat exchanger is connected with the first flow passage of the other third heat exchanger and forms another refrigerant circuit.

[0030] Among them, one of the two refrigerant circuits is provided with a compressor, and the compressor is used to drive the refrigerant in the refrigerant circuit to circulate.

[0031] Two refrigerant circuits are arranged, when the ambient temperature can meet the demand of the heat exchange system on the heat exchange of the battery monomer, only the refrigerant circuit without the compressor is operated, when the ambient temperature cannot meet the demand of the heat exchange system on the heat exchange of the battery monomer, the refrigerant circuit with the compressor is operated, thereby effectively meeting the demand of the heat exchange on the battery monomer.

[0032] In some embodiments of the present application, the second heat exchanger comprises:

[0033] A heat exchanger body, the heat exchanger body has a refrigerant flow passage, the refrigerant flow passage is connected with the first flow passage;

[0034] At least one air flow driving member, the at least one air flow driving member is arranged adjacent to the heat exchange body and is used for driving the air flow to exchange heat with the heat exchanger body.

[0035] In the second heat exchanger, the refrigerant flow channel of the heat exchanger body is used for refrigerant flow, when the refrigerant flows in the refrigerant flow channel, the airflow driving member drives the airflow to contact the heat exchanger body, the airflow exchanges heat with the refrigerant in the refrigerant flow channel through the heat exchanger body, and then the heat exchange between the refrigerant and the external airflow is realized.

[0036] In some embodiments of the present application, the heat exchange system is arranged in the box. By arranging the heat exchange system in the box, the exposure of the heat exchange system to the outside is reduced, and the failure or damage of the heat exchange system caused by external impact is reduced.

[0037] In some embodiments of the present application, the battery device further comprises a second pipe valve assembly, the first heat exchanger comprises a cooling liquid flow channel, and the cooling liquid flow channel is connected with the second flow channel through the second pipe valve assembly. The cooling liquid flow channel of the first heat exchanger and the second flow channel of the third heat exchanger are connected through the second pipe valve assembly to form a cooling liquid circuit, and the second pipe valve assembly is used for controlling the cooling liquid circuit, so that the battery monomer is heat exchanged by the cooling liquid, and the heat exchange requirement of the battery monomer is met.

[0038] In some embodiments of the present application, the second pipe valve assembly comprises:

[0039] The first main pipe body is connected with the third heat exchanger at one end and connected with one end of the second flow channel, and the first main pipe body is used for the cooling liquid to flow out of the first heat exchanger;

[0040] The other end of the first main pipe body is connected with the first heat exchanger through the first connecting piece;

[0041] The second main pipe body is connected with the third heat exchanger at one end and connected with the other end of the second flow channel, and the second main pipe body is used for the cooling liquid to flow into the first heat exchanger;

[0042] The other end of the second main pipe body is connected with the first heat exchanger through the second connecting piece.

[0043] The first connecting piece, the second connecting piece, the first main pipe body and the second main pipe body are arranged, the effective communication between the first heat exchanger and the third heat exchanger is realized, the circulation requirement of the cooling liquid is effectively met, and the battery monomer is heat exchanged by the cooling liquid.

[0044] In some embodiments of the present application, the second pipe valve assembly further comprises a first driving pump, and the first driving pump is arranged on the second main pipe body and is used for driving the circulation of the cooling liquid. The first driving pump is arranged, the flow of the cooling liquid is driven by the first driving pump, the flow rate of the cooling liquid is improved, and the heat exchange efficiency of the cooling liquid on the battery monomer is improved.

[0045] In some embodiments of the present application, the second pipe valve assembly further comprises a first pressure detection member, which is arranged on the first main pipe body and used for detecting the internal pressure of the first main pipe body. The internal pressure of the first main pipe body is detected by the first pressure detection member, so that the current internal pressure of the first main pipe body can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0046] In some embodiments of the present application, the second pipe valve assembly further comprises a second pressure detection member, which is arranged on the second main pipe body and located upstream of the driving pump, and is used for detecting the pre-pump pressure of the driving pump. The pre-pump pressure of the first driving pump is detected by the second pressure detection member, so that the pre-pump pressure of the first driving pump can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0047] In some embodiments of the present application, the second pipe valve assembly further comprises a third pressure detection member, which is arranged on the second main pipe body and located downstream of the driving pump, and is used for detecting the post-pump pressure of the driving pump. The post-pump pressure of the first driving pump is detected by the third pressure detection member, so that the post-pump pressure of the first driving pump can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0048] In some embodiments of the present application, the second pipe valve assembly further comprises a liquid storage tank, which is connected with the second main pipe body. The liquid storage tank is arranged on the second main pipe body and connected with the inside of the second main pipe body, so that the cooling liquid in the second main pipe body can enter the liquid storage tank, and the cooling liquid in the liquid storage tank can also enter the second main pipe body. The liquid storage tank is arranged to accommodate the cooling liquid when the cooling liquid in the second main pipe body expands, and to supplement the cooling liquid when the cooling liquid in the second main pipe body shrinks, so that the cooling liquid can be kept in sufficient state, thereby meeting the heat exchange demand of the battery monomer.

[0049] In some embodiments of the present application, the second pipe valve assembly further comprises a second filling valve, which is arranged on the second main pipe body and used for filling the cooling liquid. The second filling valve is arranged to supplement the cooling liquid, so that the cooling liquid is sufficient, thereby improving the heat exchange effect of the battery monomer.

[0050] In some embodiments of the present application, the second pipe valve assembly further comprises a first temperature detection member, which is arranged on the first main pipe body and used for detecting the temperature of the cooling liquid flowing through the first main pipe body. The temperature of the cooling liquid in the first main pipe body is detected by the first temperature detection member, so that the current temperature of the cooling liquid in the first main pipe body can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0051] In some embodiments of the present application, the second pipe valve assembly further comprises a second temperature measuring element arranged on the second main pipe body and configured to detect the temperature of the cooling liquid flowing through the second main pipe body.

[0052] In some embodiments of the present application, the second pipe valve assembly further comprises a third main pipe body and a third temperature measuring element arranged on the third main pipe body and configured to detect the temperature of the cooling liquid flowing through the third main pipe body.

[0053] The number of the second heat exchangers and the third heat exchangers is two, the first heat exchanger is arranged in series with the second flow channels of the two third heat exchangers and forms a cooling liquid circuit, one second heat exchanger is connected with one third heat exchanger and forms one refrigerant circuit, and the other second heat exchanger is connected with the other third heat exchanger and forms another refrigerant circuit, wherein one of the two refrigerant circuits is provided with a compressor, and the compressor is configured to drive the refrigerant in the refrigerant circuit to circulate.

[0054] The third temperature measuring element is configured to detect the temperature of the cooling liquid in the third main pipe body, so as to effectively obtain the current temperature of the cooling liquid in the third main pipe body, thereby providing data support for the control of the heat exchange system.

[0055] In some embodiments of the present application, the number of the battery devices is multiple, the first heat exchanger comprises multiple heat exchange plates, each heat exchange plate comprises a cooling liquid flow channel, and each battery cell in the multiple battery devices is at least in heat conduction connection with one heat exchange plate.

[0056] The second pipe valve assembly further comprises a fourth main pipe body and a fifth main pipe body, the fourth main pipe body is connected with the first connecting element, the fifth main pipe body is connected with the second connecting element, and the multiple heat exchange plates are connected with the fourth main pipe body and the fifth main pipe body.

[0057] The heat exchange plates are in heat conduction connection with the battery cells, the contact area with the battery cells is increased, the heat exchange area of the battery cells is increased, and the heat exchange effect of the battery cells is improved.

[0058] In some embodiments of the present application, the second pipe valve assembly further comprises at least one group of branch pipe bodies, each group of branch pipe bodies comprises an inlet pipe and an outlet pipe, the inlet pipe is connected with the fourth main pipe body, the outlet pipe is connected with the fifth main pipe body, and at least two heat exchange plates are connected in parallel between the inlet pipe and the outlet pipe. By arranging the branch pipe bodies, the communication between the multiple heat exchange plates and the fourth main pipe body and the fifth main pipe body is effectively realized, so that the heat exchange between the cooling liquid and the battery cells through the heat exchange plates is realized, and the battery cells can stably and efficiently operate.

[0059] In some embodiments of the present application, the second pipe valve assembly further comprises a first branch control valve, which is arranged on the liquid inlet pipe and used for controlling the opening and closing of the liquid inlet pipe. By arranging the first branch control valve on the liquid inlet pipe, the opening and closing of the liquid inlet pipe can be controlled by controlling the first branch control valve, thereby improving the flexibility of control.

[0060] In some embodiments of the present application, the second pipe valve assembly further comprises a second branch control valve, which is arranged on the liquid outlet pipe and used for controlling the opening and closing of the liquid outlet pipe. By arranging the second branch control valve on the liquid outlet pipe, the opening and closing of the liquid outlet pipe can be controlled by controlling the second branch control valve, thereby improving the flexibility of control.

[0061] In some embodiments of the present application, the second pipe valve assembly further comprises a second exhaust valve, which is arranged on the liquid outlet pipe or the liquid outlet pipe and used for the exhaust of the cooling liquid. By arranging the second exhaust valve, the air mixed in the cooling liquid can be discharged by the second exhaust valve to reduce the adverse effects of the air mixed in the cooling liquid on the heat exchange of the battery monomer.

[0062] In some embodiments of the present application, the battery device is arranged in the first containing space of the box body, and the second pipe valve assembly further comprises at least one fourth temperature measuring member, which is used for detecting the temperature in the first containing space. By detecting the temperature in the first containing space by the fourth temperature measuring member, the current temperature in the first containing space can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0063] In some embodiments of the present application, the second pipe valve assembly further comprises a fifth temperature measuring member, which is used for detecting the temperature of the battery monomer. By detecting the temperature of the battery monomer by the fifth temperature measuring member, the current temperature of the battery monomer can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0064] In some embodiments of the present application, the second pipe valve assembly further comprises a third filling valve, which is arranged on the fifth main pipe body and used for the filling of the cooling liquid. By arranging the third filling valve, the cooling liquid can be supplemented by the third filling valve to make the cooling liquid sufficient, thereby improving the heat exchange effect of the battery monomer.

[0065] In some embodiments of the present application, the second pipe valve assembly further comprises a second driving pump, which is arranged on the fifth main pipe body and used for driving the circulation of the cooling liquid. By arranging the second driving pump, the flow of the cooling liquid is driven by the second driving pump, thereby improving the flow rate of the cooling liquid, and thereby improving the heat exchange efficiency of the cooling liquid on the battery monomer.

[0066] In some embodiments of the present application, the second pipe valve assembly further comprises a sixth temperature detecting element, which is arranged on the fourth main pipe body and used for detecting the temperature of the cooling liquid flowing through the fourth main pipe body. The temperature of the cooling liquid flowing through the fourth main pipe body is detected by the sixth temperature detecting element, so that the current temperature of the cooling liquid flowing through the fourth main pipe body can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0067] In some embodiments of the present application, the second pipe valve assembly further comprises a seventh temperature detecting element, which is arranged on the fifth main pipe body and used for detecting the temperature of the cooling liquid flowing through the fifth main pipe body. The temperature of the cooling liquid flowing through the fifth main pipe body is detected by the seventh temperature detecting element, so that the current temperature of the cooling liquid flowing through the fifth main pipe body can be effectively obtained, thereby providing data support for the control of the heat exchange system.

[0068] In some embodiments of the present application, the second pipe valve assembly further comprises a second control valve, which is arranged on the fourth main pipe body and used for controlling the on-off of the fourth main pipe body. The second control valve is arranged on the fourth main pipe body, and the on-off of the fourth main pipe body is controlled by controlling the second control valve, thereby improving the flexibility of the control.

[0069] In some embodiments of the present application, the second pipe valve assembly further comprises a third control valve, which is arranged on the fifth main pipe body and used for controlling the on-off of the fifth main pipe body. The third control valve is arranged on the fifth main pipe body, and the on-off of the fifth main pipe body is controlled by controlling the third control valve, thereby improving the flexibility of the control.

[0070] The second aspect of the present application provides a power utilization device, which comprises the energy storage device according to the above.

[0071] The above description is only a summary of the technical solutions of the present application. In order to make the technical solutions of the present application more clearly understood and implemented, and to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0072] FIG. 1 schematically shows a structural diagram of an energy storage device according to an embodiment of the present application (in the figure, the hollow arrow line represents the flow direction of the cooling liquid);

[0073] FIG. 2 is a partial structural schematic diagram of the energy storage device shown in FIG. 1;

[0074] FIG. 3 schematically shows a structural diagram of an energy storage device according to an embodiment of the present application (in the figure, the hollow arrow line represents the flow direction of the cooling liquid);

[0075] Fig. 4 is a schematic view of a partial structure of the energy storage device shown in Fig. 3;

[0076] Fig. 5 is a schematic view of a structure of a coolant circuit and a refrigerant circuit in the energy storage device shown in Fig. 1.

[0077] The reference signs are as follows: 1000, energy storage device; 100, heat exchange system; 10, refrigerant circuit; 101, second heat exchanger; 1011, heat exchanger main body; 1012, air flow driving member; 102, first pipeline; 103, second pipeline; 104, first control valve; 105, one-way valve; 106, first detection member; 107, second detection member; 108, first filling valve; 109, third heat exchanger; 1091, first flow channel; 1092, second flow channel; 110, third detection member; 111, compressor; 20, coolant circuit; 2100, first heat exchanger; 2101, heat exchange plate; 2200, second pipeline valve assembly; 2201, first main pipeline body; 2202, second main pipeline body; 2203, first connecting member; 2204, second connecting member; 2205, first driving pump; 2206, first pressure detection member; 2207, second pressure detection member; 2208, third pressure detection member; 2209, liquid storage tank; 2210, second filling valve; 2211, first temperature detection member; 2212, second temperature detection member; 2213, sixth temperature detection member; 2214, seventh temperature detection member; 2215, fourth main pipeline body; 2216, fifth main pipeline body; 2217, branch pipeline body; 22171, liquid inlet pipe; 22172, liquid outlet pipe; 2218, first branch control valve; 2219, second branch control valve; 2220, second exhaust valve; 2221, fourth temperature detection member; 2222, fifth temperature detection member; 2223, third filling valve; 2224, second driving pump; 2225, second control valve; 2226, third control valve; 2227, third main pipeline body; 2228, third temperature detection member; 200, tank body; 21, first containing space; 22, second containing space; 300, battery device; 301, battery monomer; a, first dimension; X, vertical direction. DETAILED DESCRIPTION

[0078] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0079] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0080] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0081] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0082] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0083] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0084] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application. The orientation or position of the device or element indicated, and therefore cannot be understood as limiting the embodiments of the present application.

[0085] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mount", "connect", "connect", "fix" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0086] At present, from the development of market situation, the application of battery device is more and more widely. The battery device is not only applied to the energy storage power system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the market demand is also increasing. The energy storage device with multiple battery devices has been widely used due to its large amount of electric energy storage.

[0087] The energy storage device has been widely used due to its large amount of electric energy storage. The energy storage device usually includes a box, a heat exchange system and a plurality of batteries, the heat exchange system and the plurality of batteries are arranged in the box, and the heat exchange system is used to heat the plurality of batteries to make the plurality of batteries run stably. In the related art, the heat exchange system includes a compressor, a water pump and a heat exchanger, and the operation of the heat exchange system realizes the heat exchange of the plurality of batteries. However, the use of the heat exchange system will increase the energy consumption of the energy storage device.

[0088] In the present application, the energy storage device includes a box, a battery device and a heat exchange system, the battery device is arranged in the box, the battery device includes a first heat exchanger and a plurality of battery monomers, the first heat exchanger is used to heat the plurality of battery monomers, the heat exchange system includes a second heat exchanger and a third heat exchanger, the third heat exchanger includes a first flow channel and a second flow channel, the first flow channel and the second flow channel are not communicated with each other and heat each other, the second heat exchanger is communicated with the first flow channel and forms a refrigerant circuit for circulating flow of refrigerant, the first heat exchanger is communicated with the second flow channel and forms a refrigerant circuit for circulating flow of cooling liquid, wherein, along the vertical direction, at least part of the second heat exchanger is located above the third heat exchanger, the outlet of the second heat exchanger is higher than the inlet of the first flow channel, or the outlet of the second heat exchanger is flush with the inlet of the first flow channel. By arranging at least part of the second heat exchanger above the third heat exchanger along the vertical direction, and arranging the outlet of the second heat exchanger higher than the inlet of the first flow channel, or flush with the inlet of the first flow channel, the refrigerant can circulate in the refrigerant circuit under the action of gravity, thereby reducing the use of the compressor, and further effectively reducing the energy consumption of the energy storage device.

[0089] The energy storage device can be used in an energy storage power station, a wind power system, a solar power system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electric energy as needed and output the electric energy at an appropriate time. For example, the energy storage device can store electric energy during a low electricity consumption period, and provide electric energy for related users or electric equipment during a high electricity consumption period. The energy storage system provided in the embodiments of the present application can be any power system that needs to use an energy storage device.

[0090] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0091] In some embodiments of the present application, as shown in FIGS. 1-5, an energy storage device 1000 is provided, which includes a box body 200, a battery device 300, and a heat exchange system 100. The battery device 300 is arranged in the box body 200, and the battery device 300 includes a first heat exchanger 2100 and a plurality of battery cells 301. The first heat exchanger 2100 is used to exchange heat with the plurality of battery cells 301. The heat exchange system 100 includes a second heat exchanger 101 and a third heat exchanger 109. The third heat exchanger 109 includes a first flow channel 1091 and a second flow channel 1092. The first flow channel 1091 and the second flow channel 1092 are not in communication with each other and exchange heat with each other. The second heat exchanger 101 is in communication with the first flow channel 1091 and forms a refrigerant loop 10 for circulating flow of refrigerant. The first heat exchanger 2100 is in communication with the second flow channel 1092 and forms a coolant loop 20 for circulating flow of coolant.

[0092] In the vertical direction X, at least part of the second heat exchanger 101 is located above the third heat exchanger 109. The outlet of the second heat exchanger 101 is arranged higher than the inlet of the first flow channel 1091, or the outlet of the second heat exchanger 101 is arranged flush with the inlet of the first flow channel 1091.

[0093] In addition, the heat exchange system 100 can be arranged inside the box body 200 or outside the box body 200.

[0094] In some embodiments of the present application, the heat exchange system 100 is arranged outside the box body 200, and the battery device 300 is arranged inside the box body 200. Inside the box body 200, the first heat exchanger 2100 is used to exchange heat with the battery cells of the battery device. The heat exchange system 100 further includes a connecting assembly, which includes a connecting pipeline. The connecting pipeline is arranged through the box body 200. One end of the connecting pipeline is in communication with the second flow channel 1092 of the third heat exchanger 109 of the heat exchange system 100, and the other end of the connecting pipeline is in communication with the first heat exchanger 2100.

[0095] By arranging the heat exchange system 100 outside the cabinet 200, the internal space of the cabinet 200 can be reduced, and the space utilization of the cabinet 200 can be improved.

[0096] In some embodiments of the present application, the heat exchange system 100 is arranged inside the cabinet 200. By arranging the heat exchange system 100 inside the cabinet 200, the heat exchange system 100 is less exposed to the outside, and the heat exchange system 100 is less likely to be damaged or malfunctioned due to external impact.

[0097] As shown in FIG. 1, the heat exchange system 100 is arranged inside the cabinet 200, which includes a first accommodating space 21 and a second accommodating space 22. The first accommodating space 21 and the second accommodating space 22 are two relatively independent spaces and are not connected. The battery apparatus 300 is arranged in the first accommodating space 21, and the heat exchange system 100 is arranged in the second accommodating space 22. The second passage of the third heat exchanger 109 of the heat exchange system 100 is connected to the first heat exchanger 2100 of the battery apparatus 300 through a pipeline.

[0098] In the cabinet 200 of the present application, multiple battery apparatuses 300 are arranged to improve the voltage and capacity of the energy storage device 1000. The multiple battery apparatuses 300 are connected in series through a busbar to improve the voltage of the energy storage device 1000.

[0099] The battery apparatus 300 mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include multiple battery cells 301 connected in series, parallel, or mixed connection through a busbar.

[0100] In some embodiments, the battery cell assembly is usually formed by arranging multiple battery cells 301.

[0101] As an example, the battery cell assembly can be a battery module formed by arranging and fixing multiple battery cells 301 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells with a cable tie.

[0102] In some embodiments, the battery apparatus 300 can be a battery pack including a battery box and one or more battery cell assemblies accommodated in the battery box.

[0103] As an example, the battery box can be a simple cuboid or cylinder or sphere, or a complex cuboid or cylinder or sphere formed by combining simple cuboids or cylinders or spheres, etc. The material of the battery box can be an alloy material such as steel, iron, aluminum alloy, iron alloy, etc., a polymer material such as polycarbonate, polyisocyanurate foam plastic, etc., or a composite material such as glass fiber and epoxy resin, etc.

[0104] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the battery box by fixing the battery module in the battery box.

[0105] As an example, the battery cell assembly can also be accommodated in the battery box by directly fixing a plurality of battery cells 301 in the battery box.

[0106] As an example, the battery box can include a first part and a second part. The first part and the second part are buckled so that a closed space is formed inside the battery box to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first part can be a top cover or a bottom plate.

[0107] As an example, the battery box can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that a closed space is formed inside the battery box to accommodate the battery cell assembly.

[0108] In some embodiments, when the battery device 300 is used in a vehicle, the battery box can be part of the chassis structure of the vehicle. For example, part of the battery box can be at least part of the floor of the vehicle, or part of the battery box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0109] In some embodiments, when the number of battery devices 300 is multiple, the multiple battery devices 300 include two or more battery devices 300, and the multiple battery devices 300 can be regularly arranged or irregularly arranged in the first accommodation space 21. In this application, a bracket is arranged inside the first accommodation space 21, and the battery device 300 is arranged in the bracket, so that the battery device 300 is arranged in a rectangular array in the first accommodation space 21, so that more battery devices 300 can be accommodated in the first accommodation space 21, thereby improving the energy density of the energy storage device 1000.

[0110] In the present application, the at least partial second heat exchanger 101 is located above the third heat exchanger 109 in the vertical direction X, which means that the second heat exchanger 101 and the third heat exchanger 109 have a height difference (i.e. a drop) in the vertical direction X. The outlet of the second heat exchanger 101 is arranged at the bottom or a position close to the bottom of the second heat exchanger 101, the inlet of the first flow channel 1091 of the third heat exchanger 109 is arranged at the top or a position close to the top of the third heat exchanger 109, the outlet of the second heat exchanger 101 is in communication with the inlet of the first flow channel 1091, and under the action of gravity, the refrigerant flowing out of the second heat exchanger 101 can enter the first flow channel 1091 through the inlet of the first flow channel 1091 and flow along the first flow channel 1091.

[0111] The outlet of the second heat exchanger 101 is arranged higher than the inlet of the first flow channel 1091, which means that in the height direction, the position of the outlet of the second heat exchanger 101 is higher than the position of the inlet of the first flow channel 1091.

[0112] The outlet of the second heat exchanger 101 is arranged flush with the inlet of the first flow channel 1091, which means that in the height direction, the height of the position of the outlet of the second heat exchanger 101 is the same as the height of the position of the inlet of the first flow channel 1091.

[0113] Specifically, the refrigerant is arranged in the refrigerant circuit 10 and can circulate in the refrigerant circuit 10, the coolant is arranged in the coolant circuit 20, the coolant exchanges heat with the battery monomer 301 through the first heat exchanger 2100, the refrigerant exchanges heat with the air through the second heat exchanger 101, and the coolant and the refrigerant exchange heat in the third heat exchanger 109. The first flow channel 1091 and the second flow channel 1092 are both formed inside the third heat exchanger 109 and are arranged to be not in communication with each other, but can exchange heat with each other, so that the refrigerant flowing through the first flow channel 1091 and the coolant flowing through the second flow channel 1092 can exchange heat.

[0114] In the present application, the heat exchange system 100 can both heat and cool the battery monomer 301. When the current temperature of the battery monomer 301 is lower than the preset temperature range, the heat exchange system 100 heats the battery monomer 301, and when the current temperature of the battery monomer 301 is higher than the preset temperature range, the heat exchange system 100 cools (i.e. dissipates heat) the battery monomer 301.

[0115] The following will be described in detail by taking the example of dissipating heat of the battery monomer 301 by the heat exchange system 100:

[0116] When the heat exchange system 100 exchanges heat with the battery monomer 301, the refrigerant exchanges heat with the air at the position of the second heat exchanger 101 (before the heat exchange, the refrigerant is in a gaseous state, and the temperature of the refrigerant is reduced after the heat exchange with the air, so that the refrigerant changes from the gaseous state to the liquid state), and the refrigerant that has exchanged heat in the second heat exchanger 101 flows into the inlet of the first flow channel 1091 of the third heat exchanger 109 through the outlet of the second heat exchanger 101. The refrigerant flows along the first flow channel 1091 and exchanges heat with the cooling liquid flowing along the second flow channel 1092 (before the heat exchange, the refrigerant is in a liquid state, and the temperature of the refrigerant is increased after the heat exchange with the cooling liquid, so that the refrigerant changes from the liquid state to the gaseous state, and the temperature of the cooling liquid is reduced), and the cooling liquid that has exchanged heat with the battery monomer 301 flows into the first heat exchanger 2100 and exchanges heat with the battery monomer 301 through the first heat exchanger 2100 (after the heat exchange, the temperature of the battery monomer 301 is reduced, and the temperature of the cooling liquid is increased), and the cooling liquid that has exchanged heat with the battery monomer 301 flows out of the first heat exchanger 2100 and returns to the second flow channel 1092 of the third heat exchanger 109 to circulate.

[0117] By arranging at least part of the second heat exchanger 101 above the third heat exchanger 109 along the vertical direction X and arranging the outlet of the second heat exchanger 101 to be higher than the inlet of the first flow channel 1091 or to be flush with the inlet of the first flow channel 1091, the refrigerant can circulate in the refrigerant circuit 10 under the action of gravity, so that the use of the compressor 111 can be reduced, and the energy consumption of the energy storage device 1000 can be effectively reduced.

[0118] It should be noted that in the present application, the refrigerant is R134A or R410A component refrigerant, preferably R513A or R32, or other GWP lower and more environmentally friendly refrigerant.

[0119] In addition, in the present application, the cooling liquid is a liquid that can achieve a cooling effect. The cooling liquid can be a molten metal liquid, and the cooling liquid can be an ethylene glycol aqueous solution, etc. The type of the cooling liquid is not limited in the embodiments of the present application.

[0120] In some embodiments of the present application, as shown in FIGS. 1 to 4, along the vertical direction X, the outlet of the second heat exchanger 101 is arranged to be higher than the inlet of the first flow channel 1091, and the outlet of the second heat exchanger 101 and the inlet of the first flow channel 1091 have a preset interval, and the refrigerant circuit 10 further comprises a first pipe valve assembly, and part of the first pipe valve assembly is arranged in the preset interval.

[0121] Specifically, the first pipe valve assembly includes a plurality of pipes, a plurality of control valves, and related detection components, etc. The second heat exchanger 101 and the third heat exchanger 109 are connected through the first pipe valve assembly, thereby forming a refrigerant circulation loop for the circulation of the refrigerant.

[0122] In the present application, the second heat exchanger 101 is arranged above the third heat exchanger 109 with a preset interval formed between them in the vertical direction X. By forming the preset interval between the second heat exchanger 101 and the third heat exchanger 109, the outlet of the second heat exchanger 101 is arranged higher than the inlet of the first flow channel 1091, which increases the difference in the vertical direction X between the second heat exchanger 101 and the third heat exchanger 109, thereby improving the driving force during the flow of the refrigerant from the second heat exchanger 101 to the third heat exchanger 109. At the same time, by arranging part of the first pipe valve assembly in the preset interval, the structure can be compact, effectively improving the space utilization.

[0123] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the preset interval has a first size a in the vertical direction X, and the first size a is greater than or equal to 10 cm.

[0124] Specifically, by arranging the first size a, the second heat exchanger 101 and the third heat exchanger 109 have sufficient difference in the vertical direction X, thereby providing sufficient driving force for the flow of the refrigerant from the second heat exchanger 101 to the third heat exchanger 109, so that the refrigerant can circulate effectively in the refrigerant loop 10, thereby effectively realizing heat exchange for the battery monomer 301.

[0125] In addition, by arranging the first size a of the preset interval in the vertical direction X, the second heat exchanger 101 and the third heat exchanger 109 have installation space therebetween, thereby improving the convenience of installation and the efficiency of assembly.

[0126] It should be noted that in the present application, the first size a can be 10 cm, 11 cm, 12 cm, 13 cm, 14 cm, 15 cm, 16 cm, 17 cm, 18 cm, 19 cm, 20 cm, 21 cm, 22 cm, 23 cm, 24 cm, 25 cm, 26 cm, 27 cm, 29 cm, or 30 cm.

[0127] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the first pipe valve assembly includes a first pipe 102 and a second pipe 103, one end of the first pipe 102 is connected to the outlet of the second heat exchanger 101, the other end of the first pipe 102 is connected to the inlet of the first flow channel 1091, the first pipe 102 is arranged in the preset interval, one end of the second pipe 103 is connected to the inlet of the second heat exchanger 101, the other end of the second pipe 103 is connected to the outlet of the first flow channel 1091, and the second pipe 103 is arranged outside the preset interval.

[0128] Specifically, the first pipe 102 and the second pipe 103 are arranged to realize effective communication between the second heat exchanger 101 and the third heat exchanger 109, thereby meeting the circulation requirement of the refrigerant.

[0129] In addition, the first pipe 102 is arranged in the preset interval, which can make the overall structure compact, thereby improving the space utilization.

[0130] It should be noted that the first pipe 102 is connected to the second heat exchanger 101, and the connection mode therebetween includes but is not limited to welding, clamping, threaded connection or connection through a connecting piece, etc. Similarly, the first pipe 102 is connected to the third heat exchanger 109 and connected to the inlet of the first flow channel 1091, and the connection mode between the first pipe 102 and the third heat exchanger 109 includes but is not limited to welding, clamping, threaded connection or connection through a connecting piece, etc.

[0131] In addition, the second pipe 103 is connected to the second heat exchanger 101, and the connection mode therebetween includes but is not limited to welding, clamping, threaded connection or connection through a connecting piece, etc. Similarly, the second pipe 103 is connected to the third heat exchanger 109 and connected to the outlet of the first flow channel 1091, and the connection mode between the second pipe 103 and the third heat exchanger 109 includes but is not limited to welding, clamping, threaded connection or connection through a connecting piece, etc.

[0132] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the first pipe valve assembly further includes a first control valve 104, which can be arranged on the first pipe 102 or the second pipe 103. When the first control valve 104 is arranged on the first pipe 102, the first control valve 104 is used to control the opening degree of the first pipe 102, and when the first control valve 104 is arranged on the second pipe 103, the first control valve 104 is arranged on the second pipe 103 and used to control the opening degree of the second pipe 103.

[0133] Specifically, the first control valve 104 is arranged on the first pipe 102 or the second pipe 103, and by adjusting the first control valve 104, the control of the first pipe 102 or the second pipe 103 can be realized, and at the same time, effective adjustment of the refrigerant flow can be realized.

[0134] It should be noted that the first control valve 104 is an electromagnetic valve, and the electromagnetic valve can adjust the size of the opening degree, thereby realizing the adjustment of the refrigerant flow.

[0135] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the first pipe valve assembly further comprises a one-way valve 105, which is arranged on the first pipe 102 and is configured to be one-way conducted from the second heat exchanger 101 to the third heat exchanger 109, or the one-way valve 105 is arranged on the second pipe 103 and is configured to be one-way conducted from the third heat exchanger 109 to the second heat exchanger 101.

[0136] Specifically, by arranging the one-way valve 105, the refrigerant after heat exchange through the second heat exchanger 101 can flow to the third heat exchanger 109 in one direction, reducing the backflow of the refrigerant and improving the heat exchange effect on the battery monomer 301.

[0137] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the first pipe valve assembly further comprises a first detection member 106, which is arranged on the first pipe 102 and is used to detect at least one parameter of the temperature and pressure of the refrigerant.

[0138] Specifically, by using the first detection member 106 to detect at least one of the temperature and pressure of the refrigerant in the first pipe 102, the current parameters of the refrigerant in the first pipe 102 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0139] It should be noted that the first detection member 106 can only detect the temperature of the refrigerant, or only detect the pressure of the refrigerant, or simultaneously detect the pressure and temperature of the refrigerant.

[0140] When the first detection member 106 only detects the refrigerant, the first detection member 106 can be a temperature sensor and the like, when the first detection member 106 only detects the pressure of the refrigerant, the first detection member 106 can be a pressure sensor, and when the first detection member 106 simultaneously detects the pressure and temperature of the refrigerant, the first temperature detection member can be a temperature and pressure sensor.

[0141] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the first pipe valve assembly further comprises a second detection member 107, which is arranged on the second pipe 103 and is used to detect at least one parameter of the temperature and pressure of the refrigerant.

[0142] Specifically, the second detection member 107 is configured to detect at least one of the temperature and the pressure of the refrigerant in the second pipeline 103, so that the current parameter of the refrigerant in the second pipeline 103 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0143] It should be noted that the second detection member 107 can be configured to detect only the temperature of the refrigerant, or only the pressure of the refrigerant, or both the temperature and the pressure of the refrigerant.

[0144] When the second detection member 107 is configured to detect only the refrigerant, the second detection member 107 can be a temperature sensor; when the second detection member 107 is configured to detect only the pressure of the refrigerant, the second detection member 107 can be a pressure sensor; and when the second detection member 107 is configured to detect both the temperature and the pressure of the refrigerant, the second detection member 107 can be a temperature and pressure sensor.

[0145] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the first pipe valve assembly further comprises a third detection member 110, which is arranged outside the second heat exchanger 101 and is configured to detect the ambient temperature.

[0146] Specifically, the third detection member 110 is configured to detect the ambient temperature, thereby providing data support for the control of the heat exchange system 100.

[0147] It should be noted that in the present application, the third detection member 110 can be a temperature sensor or a thermometer.

[0148] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the first pipe valve assembly further comprises a first filling valve 108, which is arranged on the first pipeline 102 or the second pipeline 103 and is configured to fill the refrigerant.

[0149] Specifically, the first filling valve 108 is configured to supplement the refrigerant in the refrigerant circuit 10, so that the refrigerant in the refrigerant circuit 10 is sufficient, thereby improving the heat exchange effect on the battery monomer 301.

[0150] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the first pipe valve assembly further comprises a first exhaust valve, which is arranged on the first pipeline 102 or the second pipeline 103 and is configured to exhaust the refrigerant.

[0151] Specifically, the first exhaust valve is configured to exhaust the air in the refrigerant circuit 10, so as to reduce the adverse effect of the air mixed in the refrigerant on the heat exchange of the battery monomer 301.

[0152] It should be noted that the first filling valve 108 can be a common filling valve or a filling valve with an exhaust function. When the first filling valve 108 is a filling valve with an exhaust function, the filling of the refrigerant in the refrigerant circuit 10 and the exhaust of air in the refrigerant can be performed through the first filling valve 108, and at this time, the first exhaust valve does not need to be additionally provided, thereby reducing the number of components and reducing the manufacturing cost.

[0153] In some embodiments of the present application, as shown in FIG. 4, the number of the second heat exchanger 101 and the third heat exchanger 109 is two, the first heat exchanger 2100 is arranged in series with the second flow channel 1092 of the two third heat exchangers 109 and forms a cooling liquid circuit 1001, one second heat exchanger 101 is connected with the first flow channel 1091 of one third heat exchanger 109 and forms one refrigerant circuit 10, and the other second heat exchanger 101 is connected with the first flow channel 1091 of the other third heat exchanger 109 and forms another refrigerant circuit 10.

[0154] Among them, one of the two refrigerant circuits 10 is provided with a compressor 111, and the compressor 111 is used to drive the refrigerant in the refrigerant circuit 10 to circulate.

[0155] Specifically, among the two refrigerant circuits 10, one refrigerant circuit 10 has a compressor 111, and the other refrigerant circuit 10 does not have a compressor 111.

[0156] The two refrigerant circuits 10 are provided, when the environmental temperature can meet the demand of the heat exchange system 100 on the battery monomer 301, only the refrigerant circuit 10 without the compressor 111 is operated, when the environmental temperature cannot meet the demand of the heat exchange system 100 on the battery monomer 301, the refrigerant circuit 10 with the compressor 111 is operated, thereby effectively meeting the demand of the heat exchange on the battery monomer 301.

[0157] Specifically, in the use process of the energy storage device 1000, the BMS (Battery Management System, i.e. battery management system) judges whether the temperature of the region exceeds the target control temperature and reaches the refrigeration function opening mode according to the temperature of the battery monomer 301 in the first containing space 21.

[0158] If the temperature exceeds the target control temperature, the BMS calculates δT = Tw-Tamb according to the current temperature Tw of the battery monomer 301 and the environmental temperature Tamb, δT>1℃, and the refrigeration mode is opened, if δT≤0℃, the BMS judges to close the refrigeration function. When refrigerating, the temperature control target Taim of the cooling liquid is sent to the heat exchange system 100.

[0159] The heat exchange system 100 compares the temperature of the cooling liquid with the temperature control target Taim. If δTw = Tw-Taim, δTw > 1℃ and δT > 1℃, the refrigerant circuit 10 without the compressor 111 is opened and the flow rate of the refrigerant circuit 10 is controlled, the flow rate of the refrigerant circuit 10 is proportional to δTw, when δTw > 3℃, the flow rate of the refrigerant circuit 10 reaches the maximum and the refrigerant circuit 10 with the compressor 111 is opened (the compressor 111 is operated). Until δTw ≤ 3℃, the refrigerant circuit 10 with the compressor 111 is closed. In other refrigeration requirements, the refrigerant circuit 10 without the compressor 111 is opened. According to δTw ≤ 0℃ and δT ≤ 0℃, the BMS closes the refrigeration function of the heat exchange system 100.

[0160] In some embodiments of the present application, as shown in FIG. 2 or FIG. 4, the second heat exchanger 101 comprises a heat exchanger body 1011 and at least one air flow driving member 1012, the heat exchanger body 1011 has a refrigerant flow channel, the refrigerant flow channel is in communication with the first flow channel 1091, and the at least one air flow driving member 1012 is arranged adjacent to the heat exchange body and is used to drive the air flow to exchange heat with the heat exchanger body 1011.

[0161] Specifically, the refrigerant flow channel is formed in the heat exchanger body 1011, one end of the first pipeline 102 is connected with the heat exchanger body 1011 and in communication with the outlet of the refrigerant flow channel, the other end of the first pipeline 102 is connected with the third heat exchanger 109 and in communication with the inlet of the first flow channel 1091, one end of the second pipeline 103 is connected with the third heat exchanger 109 and in communication with the outlet of the first flow channel 1091, and the other end of the second pipeline 103 is connected with the heat exchanger body 1011 and in communication with the inlet of the refrigerant flow channel.

[0162] In the second heat exchanger 101, the refrigerant flow channel of the heat exchanger body 1011 is used for refrigerant flow, when the refrigerant flows in the refrigerant flow channel, the air flow driving member 1012 drives the air flow to contact the heat exchanger body 1011, the air flow exchanges heat with the refrigerant in the refrigerant flow channel through the heat exchanger body 1011, thereby realizing the heat exchange between the refrigerant and the external air flow.

[0163] It should be pointed out that the heat exchanger body 1011 comprises a coil pipe and a plurality of fins, the refrigerant flow channel is formed in the coil pipe, and the plurality of fins are connected to the outer wall of the coil pipe, when the refrigerant flows through the coil pipe, the air exchanges heat with the refrigerant through the coil pipe and the fins.

[0164] In addition, the number of the air flow driving member 1012 can be one, two, three, four, five, etc. In the present application, the air flow driving member 1012 is a fan or a blower, etc.

[0165] In some embodiments of the present application, as shown in FIGS. 1-4, the battery device 300 further comprises a second pipe valve assembly 2200, and the first heat exchanger 2100 comprises a cooling liquid flow channel, which is connected to the second flow channel 1092 through the second pipe valve assembly 2200.

[0166] Specifically, the second pipe valve assembly 2200 comprises a plurality of pipes, a plurality of control valves, and related detection components, etc.

[0167] The cooling liquid flow channel of the first heat exchanger 2100 is connected to the second flow channel 1092 of the third heat exchanger 109 through the second pipe valve assembly 2200 to form a cooling liquid circuit 20, and the second pipe valve assembly 2200 is used to control the cooling liquid circuit 20, so that the battery monomer 301 is heat exchanged by the cooling liquid, thereby meeting the heat exchange requirement of the battery monomer 301.

[0168] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 comprises a first main pipe body 2201, a first connecting piece 2203, a second main pipe body 2202, and a second connecting piece 2204. One end of the first main pipe body 2201 is connected to the second heat exchanger 101 and connected to one end of the second flow channel 1092, and the first main pipe body 2201 is used for the cooling liquid to flow out of the first heat exchanger 2100. The other end of the first main pipe body 2201 is connected to the first heat exchanger 2100 through the first connecting piece 2203. One end of the second main pipe body 2202 is connected to the second heat exchanger 101 and connected to the other end of the second flow channel 1092, and the second main pipe body 2202 is used for the cooling liquid to flow into the first heat exchanger 2100. The other end of the second main pipe body 2202 is connected to the first heat exchanger 2100 through the second connecting piece 2204.

[0169] The first connecting piece 2203, the second connecting piece 2204, the first main pipe body 2201, and the second main pipe body 2202 are arranged to realize effective communication between the first heat exchanger 2100 and the third heat exchanger 109, effectively meet the requirement of cooling liquid circulation, and effectively utilize the cooling liquid to heat exchange the battery monomer 301.

[0170] In addition, in the present application, the first main pipe body 2201 and the second main pipe body 2202 are arranged in the second containing space 22, and the first connecting piece 2203 and the second connecting piece 2204 are quick plug-in interfaces. By arranging the first connecting piece 2203 and the second connecting piece 2204, the structure of the cooling liquid circuit 20 can be split, thereby improving the convenience during transportation.

[0171] In addition, the first main pipe body 2201 is connected with the third heat exchanger 109 and communicates with the inlet of the second flow channel 1092, and the connection mode between the two includes but is not limited to welding, clamping, threaded connection or connection through a connecting piece, etc. Similarly, the second main pipe body 2202 is connected with the third heat exchanger 109 and communicates with the inlet of the first flow channel 1091, and the connection mode between the first pipeline 102 and the third heat exchanger 109 includes but is not limited to welding, clamping, threaded connection or connection through a connecting piece, etc.

[0172] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a first driving pump 2205, which is arranged on the second main pipe body 2202 and is used to drive the circulation of the cooling liquid.

[0173] Specifically, the first driving pump 2205 is arranged to drive the flow of the cooling liquid, thereby improving the flow rate of the cooling liquid and further improving the heat exchange efficiency of the cooling liquid on the battery monomer 301.

[0174] It should be pointed out that in other embodiments of the present application, the first driving pump 2205 can also be arranged on the first main pipe body 2201.

[0175] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a first pressure detection member 2206, which is arranged on the first main pipe body 2201 and is used to detect the internal pressure of the first main pipe body 2201.

[0176] Specifically, the first pressure detection member 2206 is used to detect the internal pressure of the first main pipe body 2201, which can effectively obtain the current internal pressure of the first main pipe body 2201, thereby providing data support for the control of the heat exchange system 100.

[0177] It should be pointed out that the first pressure detection member 2206 can be a pressure sensor or a pressure gauge, etc.

[0178] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a second pressure detection member 2207, which is arranged on the second main pipe body 2202 and is located upstream of the driving pump, and is used to detect the pre-pump pressure of the driving pump.

[0179] Specifically, the second pressure detection member 2207 is used to detect the pre-pump pressure of the first driving pump 2205, which can effectively obtain the pre-pump pressure of the first driving pump 2205, thereby providing data support for the control of the heat exchange system 100.

[0180] It should be noted that the second pressure detection member 2207 can be a pressure sensor or a pressure gauge, etc.

[0181] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a third pressure detection member 2208, which is arranged on the second main pipe body 2202 and located downstream of the driving pump, and is used to detect the pressure after the driving pump.

[0182] Specifically, the third pressure detection member 2208 is used to detect the pressure after the first driving pump 2205, which can effectively obtain the pressure after the first driving pump 2205, thereby providing data support for the control of the heat exchange system 100.

[0183] It should be noted that the second pressure detection member 2207 can be a pressure sensor or a pressure gauge, etc.

[0184] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a liquid storage tank 2209, which is in communication with the second main pipe body 2202.

[0185] Specifically, the liquid storage tank 2209 is arranged on the second main pipe body 2202 and is in communication with the inside of the second main pipe body 2202, the cooling liquid in the second main pipe body 2202 can enter the liquid storage tank 2209, and the cooling liquid in the liquid storage tank 2209 can also enter the second main pipe body 2202. By arranging the liquid storage tank 2209, the cooling liquid in the second main pipe body 2202 can be contained when it expands, and the cooling liquid can be supplemented when it shrinks, so that the cooling liquid can be kept in a sufficient state, thereby meeting the heat exchange demand of the battery monomer 301.

[0186] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a second filling valve 2210, which is arranged on the second main pipe body 2202 and is used for filling the cooling liquid.

[0187] Specifically, by arranging the second filling valve 2210, the cooling liquid can be supplemented through the second filling valve 2210 to make the cooling liquid sufficient, thereby improving the heat exchange effect of the battery monomer 301.

[0188] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a first temperature measurement member 2211, which is arranged on the first main pipe body 2201 and is used to detect the temperature of the cooling liquid flowing through the first main pipe body 2201.

[0189] Specifically, the temperature of the cooling liquid in the first main pipe body 2201 is detected by the first temperature measuring member 2211, so that the current temperature of the cooling liquid in the first main pipe body 2201 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0190] It should be noted that the first temperature measuring member 2211 can be a temperature sensor or a thermometer.

[0191] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a second temperature measuring member 2212, which is arranged on the second main pipe body 2202 and is used to detect the temperature of the cooling liquid flowing through the second main pipe body 2202.

[0192] Specifically, the temperature of the cooling liquid in the second main pipe body 2202 is detected by the second temperature measuring member 2212, so that the current temperature of the cooling liquid in the second main pipe body 2202 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0193] It should be noted that the second temperature measuring member 2212 can be a temperature sensor or a thermometer.

[0194] In some embodiments of the present application, as shown in FIGS. 1-4, the second pipe valve assembly 2200 further comprises a third main pipe body 2227 and a third temperature measuring member 2228, which is arranged on the third main pipe body 2227 and is used to detect the temperature of the cooling liquid flowing through the third main pipe body 2227. The number of the second heat exchanger 101 and the third heat exchanger 109 is two, the first heat exchanger 2100 is arranged in series with the second flow channel 1092 of the two third heat exchangers 109 and forms a cooling liquid circuit 20, one second heat exchanger 101 is connected with one third heat exchanger 109 and forms a refrigerant circuit 10, and the other second heat exchanger 101 is connected with the other third heat exchanger 109 and forms another refrigerant circuit 10, wherein one of the two refrigerant circuits 10 is provided with a compressor 111, and the compressor 111 is used to drive the refrigerant in the refrigerant circuit 10 to circulate.

[0195] Specifically, the temperature of the cooling liquid in the third main pipe body 2227 is detected by the third temperature measuring member 2228, so that the current temperature of the cooling liquid in the third main pipe body 2227 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0196] It should be noted that the third temperature measuring member 2228 can be a temperature sensor or a thermometer.

[0197] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the number of battery devices 300 is multiple, the first heat exchanger 2100 includes multiple heat exchange plates 2101, each heat exchange plate 2101 includes a cooling liquid flow channel, and each battery cell 301 in the multiple battery devices 300 is in heat conduction connection with at least one heat exchange plate 2101. The second pipe valve assembly 2200 further includes a fourth main pipe body 2215 and a fifth main pipe body 2216, the fourth main pipe body 2215 is in communication with the first connecting piece 2203, the fifth main pipe body 2216 is in communication with the second connecting piece 2204, and the multiple heat exchange plates 2101 are in communication with the fourth main pipe body 2215 and the fifth main pipe body 2216, respectively.

[0198] Specifically, the plate surface of the heat exchange plate 2101 is the largest surface in the heat exchange plate 2101, and the plate surface is in heat conduction connection with the battery cell 301. By using the heat exchange plate 2101 in heat conduction connection with the battery cell 301, the contact area with the battery cell 301 is increased, so that the heat exchange area of the battery cell 301 is increased, thereby improving the heat exchange effect of the battery cell 301.

[0199] It should be noted that the fourth main pipe body 2215 can be a whole structure or a split structure, when the fourth main pipe body 2215 is a split structure, the fourth main pipe body 2215 can be formed by splicing a plurality of pipe segments and a plurality of quick plug joints, so as to facilitate transportation and installation.

[0200] In addition, the fifth main pipe body 2216 can be a whole structure or a split structure, when the fifth main pipe body 2216 is a split structure, the fifth main pipe body 2216 can be formed by splicing a plurality of pipe segments and a plurality of quick plug joints, so as to facilitate transportation and installation.

[0201] In addition, the number of heat exchange plates 2101 can be two, three, four, five, six, etc.

[0202] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further includes at least one set of branch pipe bodies 2217, each set of branch pipe bodies 2217 includes an inlet pipe 22171 and an outlet pipe 22172, the inlet pipe 22171 is in communication with the fourth main pipe body 2215, the outlet pipe 22172 is in communication with the fifth main pipe body 2216, and at least two heat exchange plates 2101 are connected in parallel between the inlet pipe 22171 and the outlet pipe 22172.

[0203] Specifically, by providing the branch pipe body 2217, the communication of the multiple heat exchange plates 2101 with the fourth main pipe body 2215 and the fifth main pipe body 2216 is effectively realized, thereby realizing the heat exchange between the cooling liquid and the battery cell 301 through the heat exchange plate 2101, so that the battery cell 301 can operate stably and efficiently.

[0204] In the present application, when the branch pipe body 2217 is in multiple groups, the multiple groups of branch pipe bodies 2217 are respectively connected in parallel on the fourth main pipe body 2215 and the fifth main pipe body 2216, a plurality of heat exchange plates 2101 are connected in parallel on each group of branch pipe bodies 2217, the plurality of heat exchange plates 2101 located on each branch pipe body 2217 are arranged in the vertical direction X and are spaced apart from each other, the battery monomer 301 is arranged between the adjacent two heat exchange plates 2101, and the battery monomer 301 is in heat conduction connection with each heat exchange plate 2101.

[0205] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a first branch control valve 2218, which is arranged on the liquid inlet pipe 22171 and is used to control the on-off of the liquid inlet pipe 22171.

[0206] Specifically, the first branch control valve 2218 is arranged on the liquid inlet pipe 22171, and by controlling the first branch control valve 2218, the on-off control of the liquid inlet pipe 22171 is realized, thereby improving the flexibility of the control.

[0207] It should be pointed out that the first branch control valve 2218 can be an electromagnetic switch valve, etc.

[0208] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a second branch control valve 2219, which is arranged on the liquid outlet pipe 22172 and is used to control the on-off of the liquid outlet pipe 22172.

[0209] Specifically, the second branch control valve 2219 is arranged on the liquid outlet pipe 22172, and by controlling the second branch control valve 2219, the on-off control of the liquid outlet pipe 22172 is realized, thereby improving the flexibility of the control.

[0210] It should be pointed out that the second branch control valve 2219 can be an electromagnetic switch valve, etc.

[0211] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a second exhaust valve 2220, which is arranged on the liquid outlet pipe 22172 or the liquid outlet pipe 22172 and is used for the exhaust of the cooling liquid.

[0212] Specifically, by arranging the second exhaust valve 2220, the air mixed in the cooling liquid can be discharged by using the second exhaust valve 2220, so as to reduce the adverse effect of the air mixed in the cooling liquid on the heat exchange of the battery monomer 301.

[0213] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises at least one fourth temperature detecting element 2221, and the at least one fourth temperature detecting element 2221 is configured to detect the temperature in the first containing space 21.

[0214] Specifically, the fourth temperature detecting element 2221 is configured to detect the temperature in the first containing space 21, so that the current temperature in the first containing space 21 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0215] It should be noted that the fourth temperature detecting element 2221 can be a temperature sensor or a thermometer, etc.

[0216] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a fifth temperature detecting element 2222, and one fifth temperature detecting element 2222 is arranged on each battery monomer 301, and the fifth temperature detecting element 2222 is configured to detect the temperature of the battery monomer 301.

[0217] Specifically, the fifth temperature detecting element 2222 is configured to detect the temperature of the battery monomer 301, so that the current temperature of the battery monomer 301 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0218] It should be noted that the fifth temperature detecting element 2222 can be a temperature sensor or a thermometer, etc.

[0219] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a third filling valve 2223, and the third filling valve 2223 is arranged on the fifth main pipe body 2216 and is configured to cool the liquid.

[0220] Specifically, the third filling valve 2223 is configured to supplement the cooling liquid through the third filling valve 2223, so that the cooling liquid is sufficient, thereby improving the heat exchange effect of the battery monomer 301.

[0221] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a second driving pump 2224, and the second driving pump 2224 is arranged on the fifth main pipe body 2216 and is configured to drive the circulation of the cooling liquid.

[0222] Specifically, the second driving pump 2224 is configured to drive the flow of the cooling liquid, so that the flow rate of the cooling liquid is improved, thereby improving the heat exchange efficiency of the cooling liquid on the battery monomer 301.

[0223] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a sixth temperature detecting element 2213, which is arranged on the fourth main pipe body 2215 and used for detecting the temperature of the cooling liquid flowing through the fourth main pipe body 2215.

[0224] Specifically, the temperature of the cooling liquid flowing through the fourth main pipe body 2215 is detected by the sixth temperature detecting element 2213, so that the current temperature of the cooling liquid flowing through the fourth main pipe body 2215 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0225] It should be noted that the sixth temperature detecting element 2213 can be a temperature sensor or a thermometer, etc.

[0226] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a seventh temperature detecting element 2214, which is arranged on the fifth main pipe body 2216 and used for detecting the temperature of the cooling liquid flowing through the fifth main pipe body 2216.

[0227] Specifically, the temperature of the cooling liquid flowing through the fifth main pipe body 2216 is detected by the seventh temperature detecting element 2214, so that the current temperature of the cooling liquid flowing through the fifth main pipe body 2216 can be effectively obtained, thereby providing data support for the control of the heat exchange system 100.

[0228] It should be noted that the seventh temperature detecting element 2214 can be a temperature sensor or a thermometer, etc.

[0229] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a second control valve 2225, which is arranged on the fourth main pipe body 2215 and used for controlling the on-off of the fourth main pipe body 2215.

[0230] Specifically, the second control valve 2225 is arranged on the fourth main pipe body 2215, and by controlling the second control valve 2225, the on-off control of the fourth main pipe body 2215 can be realized, thereby improving the flexibility of the control.

[0231] It should be noted that the second control valve 2225 can be an electromagnetic switch valve, etc.

[0232] In some embodiments of the present application, as shown in FIG. 1 or FIG. 3, the second pipe valve assembly 2200 further comprises a third control valve 2226, which is arranged on the fifth main pipe body 2216 and used for controlling the on-off of the fifth main pipe body 2216.

[0233] Specifically, the third control valve 2226 is arranged on the fifth main pipe body 2216, and by controlling the third control valve 2226, the control of the on-off of the fifth main pipe body 2216 can be realized, and the flexibility of the control is improved.

[0234] It should be noted that the third control valve 2226 can be an electromagnetic switch valve or the like.

[0235] The second aspect of the present application provides a power utilization device, which comprises the energy storage device 1000 according to the above.

[0236] The power utilization device has the energy storage device 1000 as described above, and the energy storage device 1000 has the same beneficial effects as the energy storage device 1000 described above, which will not be repeated here.

[0237] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, which can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described.

[0238] In the embodiments of the present application, as shown in FIGS. 1-5, the present application provides an energy storage device 1000, which comprises a box body 200, a battery device 300 and a heat exchange system 100, the battery device 300 is arranged in the box body 200, the battery device 300 comprises a first heat exchanger 2100 and a plurality of battery monomers 301, the first heat exchanger 2100 is used for heat exchange with the plurality of battery monomers 301, the heat exchange system 100 comprises a second heat exchanger 101 and a third heat exchanger 109, the third heat exchanger 109 comprises a first flow channel 1091 and a second flow channel 1092, the first flow channel 1091 and the second flow channel 1092 are not communicated with each other and heat exchange with each other, the second heat exchanger 101 is communicated with the first flow channel 1091 and forms a refrigerant circuit 10 for circulating flow of refrigerant, the first heat exchanger 2100 is communicated with the second flow channel 1092 and forms a coolant circuit 20 for circulating flow of coolant. Wherein, along the vertical direction X, at least part of the second heat exchanger 101 is located above the third heat exchanger 109, the outlet of the second heat exchanger 101 is higher than the inlet of the first flow channel 1091. There is a preset interval between the outlet of the second heat exchanger 101 and the inlet of the first flow channel 1091, along the vertical direction X, the preset interval has a first size a, the first size a is greater than or equal to 10 centimeters.

[0239] Further, the number of the second heat exchanger 101 and the third heat exchanger 109 is two, the first heat exchanger 2100 is arranged in series with the second flow channel 1092 of the two third heat exchangers 109 and forms a cooling liquid circuit 20, one second heat exchanger 101 is connected with the first flow channel 1091 of one third heat exchanger 109 and forms one refrigerant circuit 10, and the other second heat exchanger 101 is connected with the first flow channel 1091 of the other third heat exchanger 109 and forms the other refrigerant circuit 10. One of the two refrigerant circuits 10 is provided with a compressor 111, and the compressor 111 is used to drive the refrigerant in the refrigerant circuit 10 to circulate.

[0240] The refrigerant circuit 10 further comprises a first pipe valve assembly, the first pipe valve assembly comprises a first pipe 102, a second pipe 103, a first control valve 104, a one-way valve 105, a first detection piece 106, a second detection piece 107, a third detection piece 110, a first filling valve 108 and a first exhaust valve, one end of the first pipe 102 is connected with the outlet of the second heat exchanger 101, the other end of the first pipe 102 is connected with the inlet of the first flow channel 1091, the first pipe 102 is arranged in a preset interval, one end of the second pipe 103 is connected with the inlet of the second heat exchanger 101, the other end of the second pipe 103 is connected with the outlet of the first flow channel 1091, and the second pipe 103 is arranged outside the preset interval. The first control valve 104 is arranged on the first pipe 102 and is used to control the opening degree of the first pipe 102, or the first control valve 104 is arranged on the second pipe 103 and is used to control the opening degree of the second pipe 103. The one-way valve 105 is arranged on the second pipe 103, and the one-way valve 105 is configured to be one-way conducted from the third heat exchanger 109 to the second heat exchanger 101. The first detection piece 106 is arranged on the first pipe 102 and is used to detect the temperature and pressure of the refrigerant. The second detection piece 107 is arranged on the second pipe 103 and is used to detect the temperature and pressure of the refrigerant. The third detection piece 110 is arranged outside the second heat exchanger 101 and is used to detect the ambient temperature. The first filling valve 108 is arranged on the first pipe 102 and is used for the filling of the refrigerant. The first exhaust valve is arranged on the first pipe 102 and is used for the exhaust of the refrigerant. The second flow channels 1092 of the second heat exchangers 101 of the two refrigerant circuits 10 are arranged in series. One of the refrigerant circuits 10 further comprises a compressor 111, and the compressor 111 is arranged on the first pipe 102 or the second pipe 103.

[0241] The second heat exchanger 101 comprises a heat exchanger body 1011 and a plurality of air flow driving pieces 1012, the heat exchanger body 1011 has a refrigerant flow channel, the refrigerant flow channel is connected with the first flow channel 1091, and at least one air flow driving piece 1012 is arranged adjacent to the heat exchange body and is used to drive the air flow to exchange heat with the heat exchanger body 1011.

[0242] The first heat exchanger 2100 comprises a cooling liquid flow channel, and the battery device 300 further comprises a second pipe valve assembly 2200, which comprises a first main pipe body 2201, a first connecting piece 2203, a second main pipe body 2202, a second connecting piece 2204, a first driving pump 2205, a first pressure detection piece 2206, a second pressure detection piece 2207, a third pressure detection piece 2208, a liquid storage tank 2209, a second filling valve 2210, a first temperature measurement piece 2211, a second temperature measurement piece 2212, a third main pipe body 2227, a third temperature measurement piece 2228, a fourth main pipe body 2215, a fifth main pipe body 2216, a plurality of branch pipe bodies 2217, a first branch control valve 2218, a second branch control valve 2219, a second exhaust valve 2220, a plurality of fourth temperature measurement pieces 2221, a fifth temperature measurement piece 2222, a third filling valve 2223, a second driving pump 2224, a sixth temperature measurement piece 2213, a seventh temperature measurement piece 2214, a second control valve 2225, and a third control valve 2226. One end of the first main pipe body 2201 is connected with the third heat exchanger 109 and communicates with one end of the second flow channel 1092, and the first main pipe body 2201 is used for flowing the cooling liquid out of the first heat exchanger 2100. The other end of the first main pipe body 2201 communicates with the first heat exchanger 2100 through the first connecting piece 2203. One end of the second main pipe body 2202 is connected with the third heat exchanger 109 and communicates with the other end of the second flow channel 1092, and the second main pipe body 2202 is used for flowing the cooling liquid into the first heat exchanger 2100. The other end of the second main pipe body 2202 communicates with the first heat exchanger 2100 through the second connecting piece 2204. The first driving pump 2205 is arranged on the second main pipe body 2202 and is used for driving the circulation of the cooling liquid. The first pressure detection piece 2206 is arranged on the first main pipe body 2201 and is used for detecting the internal pressure of the first main pipe body 2201. The second pressure detection piece 2207 is arranged on the second main pipe body 2202 and is located upstream of the driving pump, and is used for detecting the pre-pump pressure of the driving pump. The third pressure detection piece 2208 is arranged on the second main pipe body 2202 and is located downstream of the driving pump, and is used for detecting the post-pump pressure of the driving pump. The liquid storage tank 2209 communicates with the second main pipe body 2202. The liquid storage tank 2209 is arranged on the second main pipe body 2202 and communicates with the interior of the second main pipe body 2202, and the cooling liquid in the second main pipe body 2202 can enter the liquid storage tank 2209, and the cooling liquid in the liquid storage tank 2209 can also enter the second main pipe body 2202. The second filling valve 2210 is arranged on the second main pipe body 2202 and is used for filling the cooling liquid. The second filling valve 2210 is arranged, and the cooling liquid can be supplemented through the second filling valve 2210, so that the cooling liquid is sufficient, thereby improving the heat exchange effect on the battery monomer 301. The first temperature measurement piece 2211 is arranged on the first main pipe body 2201 and is used for detecting the temperature of the cooling liquid flowing through the first main pipe body 2201.The second temperature measuring member 2212 is arranged on the second main pipe body 2202 and is used to detect the temperature of the cooling liquid flowing through the second main pipe body 2202. The third temperature measuring member 2228 is arranged on the third main pipe body 2227 and is used to detect the temperature of the cooling liquid flowing through the third main pipe body 2227, and the second flow channel 1092 of the second heat exchanger 101 of the two refrigerant circuits 10 is arranged in series through the third main pipe body 2227, wherein one refrigerant circuit 10 further comprises a compressor 111 used to drive the refrigerant to circulate in the refrigerant circuit 10.

[0243] The box body 200 comprises a plurality of battery devices 300, the first heat exchanger 2100 is arranged in the first containing space 21 and comprises a plurality of heat exchange plates 2101, each heat exchange plate 2101 comprises a cooling liquid flow channel, and the battery monomer 301 in each of the plurality of battery devices 300 is in heat conduction connection with at least one heat exchange plate 2101. The fourth main pipe body 2215 is in communication with the first connecting member 2203, the fifth main pipe body 2216 is in communication with the second connecting member 2204, and the plurality of heat exchange plates 2101 are in communication with the fourth main pipe body 2215 and the fifth main pipe body 2216 respectively. Each group of branch pipe bodies 2217 comprises an inlet pipe 22171 and an outlet pipe 22172, the inlet pipe 22171 is in communication with the fourth main pipe body 2215, the outlet pipe 22172 is in communication with the fifth main pipe body 2216, and at least two heat exchange plates 2101 are connected in parallel between the inlet pipe 22171 and the outlet pipe 22172. The first branch control valve 2218 is arranged on the inlet pipe 22171 and is used to control the opening and closing of the inlet pipe 22171. The second branch control valve 2219 is arranged on the outlet pipe 22172 and is used to control the opening and closing of the outlet pipe 22172. The second exhaust valve 2220 is arranged on the outlet pipe 22172 or the outlet pipe 22172 and is used for the exhaust of the cooling liquid. The plurality of fourth temperature measuring members 2221 are used to detect the temperature in the first containing space 21. The fifth temperature measuring member 2222 is used to detect the temperature of the battery monomer 301. The third filling valve 2223 is arranged on the fifth main pipe body 2216 and is used for the filling of the cooling liquid. The second driving pump 2224 is arranged on the fifth main pipe body 2216 and is used to drive the circulation of the cooling liquid. The sixth temperature measuring member 2213 is arranged on the fourth main pipe body 2215 and is used to detect the temperature of the cooling liquid flowing through the fourth main pipe body 2215. The seventh temperature measuring member 2214 is arranged on the fifth main pipe body 2216 and is used to detect the temperature of the cooling liquid flowing through the fifth main pipe body 2216. The second control valve 2225 is arranged on the fourth main pipe body 2215 and is used to control the opening and closing of the fourth main pipe body 2215. The third control valve 2226 is arranged on the fifth main pipe body 2216 and is used to control the opening and closing of the fifth main pipe body 2216.

[0244] Specifically, the refrigerant is provided in the refrigerant circuit 10 and can circulate in the refrigerant circuit 10, the coolant is provided in the coolant circuit 20 and exchanges heat with the battery monomer 301 through the first heat exchanger 2100, the refrigerant exchanges heat with the air through the second heat exchanger 101, and the coolant exchanges heat with the refrigerant in the third heat exchanger 109. When the heat exchange system 100 exchanges heat with the battery monomer 301, the refrigerant exchanges heat with the air at the position of the second heat exchanger 101, the refrigerant after heat exchange through the second heat exchanger 101 flows into the inlet of the first flow channel 1091 of the third heat exchanger 109 through the outlet of the second heat exchanger 101, the refrigerant flows along the first flow channel 1091 and exchanges heat with the coolant flowing along the second flow channel 1092, the refrigerant flowing out of the first flow channel 1091 flows into the second heat exchanger 101 through the inlet of the second heat exchanger 101 to circulate, and the coolant flowing out of the first flow channel exchanges heat with the battery monomer 301 through the first heat exchanger 2100 and then flows back to the second flow channel 1092 of the third heat exchanger 109 to circulate.

[0245] By arranging at least part of the second heat exchanger 101 above the third heat exchanger 109 in the vertical direction X and arranging the outlet of the second heat exchanger 101 higher than the inlet of the first flow channel 1091 or flush with the inlet of the first flow channel 1091, the refrigerant can circulate in the refrigerant circuit 10 under the action of gravity, thereby reducing the use of the compressor 111 and effectively reducing the energy consumption of the energy storage device 1000.

[0246] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, wherein, The energy storage device comprises: a box body; a battery device arranged in the box body, the battery device comprising a first heat exchanger and a plurality of battery cells, the first heat exchanger being used for heat exchange of the plurality of battery cells; a heat exchange system comprising a second heat exchanger and a third heat exchanger, the third heat exchanger comprising a first flow channel and a second flow channel, the first flow channel and the second flow channel being in communication with each other and in heat exchange with each other, the second heat exchanger being in communication with the first flow channel and forming a refrigerant loop for circulation of refrigerant, the first heat exchanger being in communication with the second flow channel and forming a coolant loop for circulation of coolant; wherein, in a vertical direction, at least part of the second heat exchanger is located above the third heat exchanger, and an outlet of the second heat exchanger is arranged higher than an inlet of the first flow channel or is arranged flush with the inlet of the first flow channel.

2. The energy storage device of claim 1, wherein, In the vertical direction, the outlet of the second heat exchanger is arranged higher than the inlet of the first flow channel, and a preset interval is provided between the outlet of the second heat exchanger and the inlet of the first flow channel, and the heat exchange system further comprises a first pipe valve assembly, part of the first pipe valve assembly being arranged in the preset interval.

3. The energy storage device of claim 2, wherein, In the vertical direction, the preset interval has a first size, and the first size is greater than or equal to 10 cm.

4. The energy storage device of claim 2 or 3, wherein, The first pipe valve assembly comprises: a first pipe line, one end of the first pipe line being connected with the outlet of the second heat exchanger, the other end of the first pipe line being connected with the inlet of the first flow channel, the first pipe line being arranged in the preset interval; a second pipe line, one end of the second pipe line being connected with the inlet of the second heat exchanger, the other end of the second pipe line being in communication with the outlet of the first flow channel, the second pipe line being arranged outside the preset interval.

5. The energy storage device of claim 4, wherein, The first pipe valve assembly further comprises a first control valve, the first control valve being arranged on the first pipe line and being used for controlling the opening degree of the first pipe line, or the first control valve being arranged on the second pipe line and being used for controlling the opening degree of the second pipe line; and / or, the first pipe valve assembly further comprises a one-way valve, the one-way valve being arranged on the first pipe line and being configured to be one-way conducted from the second heat exchanger to the third heat exchanger, or the one-way valve being arranged on the second pipe line and being configured to be one-way conducted from the third heat exchanger to the second heat exchanger.

6. The energy storage device of claim 4 or 5, wherein, The first pipe valve assembly further comprises a first detection member, the first detection member being arranged on the first pipe line and being used for detecting the temperature and / or pressure of the refrigerant; and / or, the first pipe valve assembly further comprises a second detection member, the second detection member being arranged on the second pipe line and being used for detecting the temperature and / or pressure of the refrigerant; and / or, the first pipe valve assembly further comprises a third detection member, the third detection member being arranged outside the second heat exchanger and being used for detecting the ambient temperature.

7. The energy storage device of any one of claims 4 to 6, wherein, The first pipe valve assembly further comprises a first filling valve, the first filling valve being arranged on the first pipe line or the second pipe line and being used for filling of refrigerant. And / or, the first pipe valve assembly further comprises a first exhaust valve, which is arranged on the first pipe or the second pipe and is used for exhaust of refrigerant.

8. The energy storage device of any one of claims 1 to 7, wherein, The number of the second heat exchangers and the third heat exchangers is two, the first heat exchanger is arranged in series with the second flow passages of the two third heat exchangers and forms the cooling liquid circuit, one second heat exchanger is connected with the first flow passage of one third heat exchanger and forms one refrigerant circuit, and the other second heat exchanger is connected with the first flow passage of the other third heat exchanger and forms the other refrigerant circuit. One of the two refrigerant circuits is provided with a compressor, and the compressor is used to drive the refrigerant in the refrigerant circuit to circulate.

9. The energy storage device of any one of claims 1 to 8, wherein, The second heat exchanger comprises: A heat exchanger body, which has a refrigerant flow passage connected with the first flow passage; At least one airflow driving member, which is arranged adjacent to the heat exchanger body and is used to drive airflow to exchange heat with the heat exchanger body.

10. The energy storage device of any one of claims 1 to 9, wherein, The heat exchange system is arranged in the box.

11. The energy storage device of any one of claims 1 to 10, wherein, The battery device further comprises a second pipe valve assembly, the first heat exchanger comprises a cooling liquid flow passage, and the cooling liquid flow passage is connected with the second flow passage through the second pipe valve assembly.

12. The energy storage device of claim 11, wherein, The second pipe valve assembly comprises: A first main pipe body, one end of which is connected with a third heat exchanger and connected with one end of the second flow passage, and the first main pipe body is used for cooling liquid to flow out of the first heat exchanger; A first connecting member, the other end of the first main pipe body is connected with the first heat exchanger through the first connecting member; A second main pipe body, one end of which is connected with a third heat exchanger and connected with the other end of the second flow passage, and the second main pipe body is used for cooling liquid to flow into the first heat exchanger; A second connecting member, the other end of the second main pipe body is connected with the first heat exchanger through the second connecting member.

13. The energy storage device of claim 12, wherein, The second pipe valve assembly further comprises a first driving pump, which is arranged on the second main pipe body and is used to drive the circulation of cooling liquid.

14. The energy storage device of claim 13, wherein, The second pipe valve assembly further comprises a first pressure detection member, which is arranged on the first main pipe body and is used to detect the internal pressure of the first main pipe body; And / or, the second pipe valve assembly further comprises a second pressure detection member, which is arranged on the second main pipe body and is located upstream of the driving pump, and is used to detect the pressure before the driving pump; And / or, the second pipe valve assembly further comprises a third pressure detection member, which is arranged on the second main pipe body and is located downstream of the driving pump, and is used to detect the pressure after the driving pump.

15. The energy storage device of any one of claims 12 to 14, wherein, The second pipe valve assembly further comprises a liquid storage tank, which is connected with the second main pipe body.

16. The energy storage device of any one of claims 12 to 15, wherein, The second pipe valve assembly further comprises a second filling valve, which is arranged on the second main pipe body and is used for filling of cooling liquid.

17. The energy storage device of any one of claims 12 to 16, wherein, The second pipe valve assembly further comprises a first temperature measuring element, which is arranged on the first main pipe body and used for detecting the temperature of the cooling liquid flowing through the first main pipe body. The second pipe valve assembly further comprises a second temperature measuring element, which is arranged on the second main pipe body and used for detecting the temperature of the cooling liquid flowing through the second main pipe body.

18. The energy storage device of any one of claims 12 to 17, wherein, The second pipe valve assembly further comprises a third main pipe body and a third temperature measuring element, which is arranged on the third main pipe body and used for detecting the temperature of the cooling liquid flowing through the third main pipe body. The number of the second heat exchangers and the third heat exchangers is two, the first heat exchanger is arranged in series with the second flow passages of the two third heat exchangers and forms the cooling liquid circuit, one second heat exchanger is connected with one third heat exchanger and forms one refrigerant circuit, and the other second heat exchanger is connected with the other third heat exchanger and forms the other refrigerant circuit, wherein one of the two refrigerant circuits is provided with a compressor, and the compressor is used for driving the refrigerant in the refrigerant circuit to circulate.

19. The energy storage device of any one of claims 12 to 18, wherein, The number of the battery devices is multiple, the first heat exchanger comprises multiple heat exchange plates, and the battery monomers in the multiple battery devices are at least in heat conduction connection with the heat exchange plates. The second pipe valve assembly further comprises a fourth main pipe body and a fifth main pipe body, the fourth main pipe body is connected with the first connecting element, the fifth main pipe body is connected with the second connecting element, and the multiple heat exchange plates are connected with the fourth main pipe body and the fifth main pipe body.

20. The energy storage device of claim 19, wherein, The second pipe valve assembly further comprises at least one group of branch pipe bodies, each group of branch pipe bodies comprises an inlet pipe and an outlet pipe, the inlet pipe is connected with the fourth main pipe body, the outlet pipe is connected with the fifth main pipe body, and at least two heat exchange plates are connected in parallel between the inlet pipe and the outlet pipe.

21. The energy storage device of claim 20, wherein, The second pipe valve assembly further comprises a first branch control valve, which is arranged on the inlet pipe and used for controlling the on-off of the inlet pipe. The second pipe valve assembly further comprises a second branch control valve, which is arranged on the outlet pipe and used for controlling the on-off of the outlet pipe. The second pipe valve assembly further comprises a second exhaust valve, which is arranged on the outlet pipe or the outlet pipe and used for the exhaust of the cooling liquid.

22. The energy storage device of claim 20 or 21, wherein, The battery device is arranged in the first accommodating space of the box body, and the second pipe valve assembly further comprises at least one fourth temperature measuring element, which is used for detecting the temperature in the first accommodating space. The second pipe valve assembly further comprises a fifth temperature measuring element, which is used for detecting the temperature of the battery monomer.

23. The energy storage device of any one of claims 19 to 22, wherein, The second pipe valve assembly further comprises a third filling valve, which is arranged on the fifth main pipe body and used for the filling of the cooling liquid. The second pipe valve assembly further comprises a second driving pump, which is arranged on the fifth main pipe body and used for driving the circulation of the cooling liquid. And / or, the second pipe valve assembly further comprises a sixth temperature measuring element, which is arranged on the fourth main pipe body and used for detecting the temperature of the cooling liquid flowing through the fourth main pipe body. And / or, the second pipe valve assembly further comprises a seventh temperature measuring element, which is arranged on the fifth main pipe body and used for detecting the temperature of the cooling liquid flowing through the fifth main pipe body.

24. The energy storage device of any one of claims 19 to 23, wherein, The second pipe valve assembly further comprises a second control valve, which is arranged on the fourth main pipe body and used for controlling the on-off of the fourth main pipe body. And / or, the second pipe valve assembly further comprises a third control valve, which is arranged on the fifth main pipe body and used for controlling the on-off of the fifth main pipe body.

25. An electrical device, comprising: The electric device comprises the energy storage device according to any one of claims 1-24.

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