Energy storage cabinet

Abstract

The utility model relates to the technical field of energy storage, and provides an energy storage cabinet which comprises a battery cell module, a heat exchange assembly and an internal circulation system. The battery cell module is connected to the heat exchange assembly; the internal circulation system comprises an internal circulation pipeline, a circulation power device and a heating device; the heat exchange assembly and the circulating power device are both communicated with the inner circulating pipeline; and the heating device is connected with the internal circulation pipeline. Heat generated by the heating device can be transmitted to the heat-conducting medium in the inner circulation pipeline, then the heat-conducting medium in the inner circulation pipeline transmits the heat to the heat exchange assembly, and finally the heat is transmitted to the battery cell module through the heat exchange assembly. And the heat-conducting medium can continuously circulate in the internal circulation pipeline, so that the heat exchange assembly can continuously heat the battery cell module. Therefore, the battery cell module can be continuously located in a suitable temperature range, the electric energy loss of the battery cell module can be reduced, and the utilization rate of the electric energy in the battery cell module can be improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to an energy storage cabinet. Background Technology

[0002] Currently, some regions experience an imbalance between electricity consumption and power generation during certain periods, resulting in peak and off-peak electricity load periods. To address this issue, energy storage units are typically connected to the power grid to achieve peak shaving and valley filling.

[0003] However, existing energy storage cabinets are generally located outdoors. In winter, outdoor temperatures are low, which exposes the battery modules inside the cabinet to a cold environment, resulting in significant energy loss and reducing the utilization rate of the energy within the battery modules. Utility Model Content

[0004] This application provides an energy storage cabinet including an internal circulation system and a heating device. The heating device heats the heat-conducting medium within the internal circulation system, thereby heating the battery cell module. This allows the battery cell module to be kept within a suitable temperature range to reduce energy loss.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides an energy storage cabinet, which includes: a battery cell module, a heat exchange assembly, and an internal circulation system. The battery cell module is connected to the heat exchange assembly; the internal circulation system includes an internal circulation pipeline, a circulation power device, and a heating device; the heat exchange assembly and the circulation power device are both connected to the internal circulation pipeline; the heating device is connected to the internal circulation pipeline.

[0007] As an optional implementation, the energy storage cabinet includes a module temperature detection device and a control component, wherein the module temperature detection device is connected to the battery cell module;

[0008] Both the module temperature detection element and the heating device are electrically connected to the control component.

[0009] The module temperature detection device is used to detect the temperature of the battery cell module and send the detected temperature value to the control component;

[0010] The control component is configured to: control the heating device to turn on when the detected temperature value is less than the lowest temperature value of the preset temperature range; and control the heating device to turn off when the detected temperature value is greater than or equal to the lowest temperature value of the preset temperature range.

[0011] As an optional implementation, the heating device includes a heating wire wound around the internal circulation pipe; the heating wire is electrically connected to the control component.

[0012] As an optional implementation, the internal circulation system includes a liquid replenishment component, and the internal circulation pipeline is connected to the liquid replenishment component; the liquid replenishment component is located upstream of the heating device along the flow direction of the heat-conducting medium in the internal circulation pipeline.

[0013] As an optional implementation, the fluid replenishment assembly includes an elastic container and a fluid replenishment tube, wherein the volume of the elastic container can spontaneously decrease;

[0014] Both the internal circulation pipeline and the replenishment pipeline are connected to the elastic container.

[0015] As an optional implementation, the energy storage cabinet includes an evaporator and an external circulation system;

[0016] Both the internal circulation system and the external circulation system are connected to the evaporator, and the external circulation system is used to absorb heat from the internal circulation system through the evaporator.

[0017] As an optional implementation, the external circulation system includes an external circulation pipeline filled with refrigerant; the evaporator includes a heat exchange chamber.

[0018] The first heat exchange section of the internal circulation pipeline and the second heat exchange section of the external circulation pipeline are both located in the heat exchange cavity; the second heat exchange section is used to absorb heat from the first heat exchange section through the heat exchange cavity.

[0019] As an optional implementation, the internal circulation system includes a first inlet temperature detection element and a first outlet temperature detection element, wherein the first inlet temperature detection element is connected to the inlet end of the first heat exchange section, and the first outlet temperature detection element is connected to the outlet end of the first heat exchange section.

[0020] And / or, the external circulation system includes a second inlet temperature sensor and a second outlet temperature sensor, the second inlet temperature sensor being connected to the inlet end of the second heat exchange section, and the second outlet temperature sensor being connected to the outlet end of the second heat exchange section.

[0021] As an optional implementation, the external circulation system includes a compressor, which is connected to the external circulation pipeline;

[0022] The external circulation system includes a condenser, which is connected to the external circulation pipeline;

[0023] The external circulation system includes a pressure sensor, which is connected to the external circulation pipeline.

[0024] And / or, the external circulation system includes a drying filter, which is connected to the external circulation pipeline.

[0025] As an optional implementation, the energy storage cabinet includes a cabinet body, and the battery cell module and the heat exchange assembly are both located inside the cabinet body; the inner wall of the cabinet body is provided with a heat insulation layer.

[0026] Compared with the prior art, the beneficial effects of this application are at least as follows:

[0027] The energy storage cabinet includes battery modules, heat exchange components, and an internal circulation system. The battery modules store electrical energy, achieving the purpose of energy storage. Since the battery modules are connected to the heat exchange components, they can absorb heat provided by the heat exchange components. The internal circulation system includes internal circulation piping and a heating device. The heat exchange components are connected to the internal circulation piping, and the heating device is also connected to the internal circulation piping. In this way, the heat generated by the heating device can be transferred to the heat-conducting medium in the internal circulation piping, which then transports the heat to the heat exchange components, and finally, the heat exchange components transfer the heat to the battery modules.

[0028] The internal circulation system also includes a circulation power unit, which is connected to the internal circulation pipeline. This circulation power unit provides circulation power to the heat transfer medium within the internal circulation pipeline, ensuring continuous circulation of the heat transfer medium and allowing the heat exchange components to continuously heat the battery cell module. This keeps the battery cell module within a suitable temperature range, thereby reducing energy loss and improving the energy utilization rate within the battery cell module. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of an energy storage cabinet provided in an embodiment of this application;

[0031] Figure 2 for Figure 1 A schematic diagram of some of the internal structures of the energy storage cabinet;

[0032] Figure 3 for Figure 1A schematic diagram showing the connection relationship between the internal circulation system, evaporator, and external circulation system of the energy storage cabinet;

[0033] Figure 4 This is a schematic diagram of the battery cell module structure;

[0034] Figure 5 for Figure 1 A schematic diagram of the cabinet structure of the energy storage cabinet.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100 - Energy storage cabinet; 110 - Battery cell module; 120 - Heat exchange assembly; 130 - Internal circulation system; 131 - Internal circulation pipeline; 1311 - First heat exchange section; 1312 - Inlet pressure probe; 1313 - Outlet pressure probe; 132 - Circulation power unit; 133 - Heating device; 1331 - Heating wire; 134 - Liquid replenishment assembly; 1341 - Flexible container; 13411 - Outer container shell; 13412 - Flexible gas container; 13413 - Heat transfer medium cavity; 1342 - Liquid replenishment pipe; 13421 - Ball valve; 135 - First inlet. Temperature detection element, 136-first outlet temperature detection element, 140-module temperature detection element, 150-evaporator, 151-heat exchange chamber, 160-external circulation system, 161-external circulation pipeline, 1611-second heat exchange section, 162-second inlet temperature detection element, 163-second outlet temperature detection element, 164-compressor, 165-condenser, 166-pressure sensor, 167-drier filter, 168-needle valve, 169-expansion valve, 170-cabinet, 171-insulation layer, 180-module placement chamber, 190-liquid cooling unit. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] Currently, some regions experience an imbalance between electricity consumption and power generation during certain periods, resulting in peak and off-peak electricity loads. Specifically, electricity consumption is generally higher during the day and lower at night. Power generation, however, is relatively even across these periods, leading to a supply-demand imbalance. To address this issue, energy storage units are typically connected to the power grid to achieve peak shaving and valley filling.

[0039] However, due to the large size of energy storage cabinets, they are generally installed outdoors. This means that in winter, when outdoor temperatures are low, the battery modules inside the cabinet will be in a low-temperature environment, resulting in significant energy loss and reducing the utilization rate of the energy within the battery modules.

[0040] To address the aforementioned technical problems, the energy storage cabinet provided by this utility model solves these problems by incorporating battery modules, heat exchange components, and an internal circulation system. Specifically, the energy storage cabinet includes battery modules, heat exchange components, and an internal circulation system. The battery modules store electrical energy to achieve the purpose of energy storage. Since the battery modules are connected to the heat exchange components, they can absorb heat provided by the heat exchange components. The internal circulation system includes an internal circulation pipeline and a heating device. The heat exchange components are connected to the internal circulation pipeline, and the heating device is also connected to the internal circulation pipeline. Thus, the heat generated by the heating device can be transferred to the heat-conducting medium in the internal circulation pipeline, which then transports the heat to the heat exchange components, and finally, the heat is transferred to the battery modules through the heat exchange components.

[0041] The internal circulation system also includes a circulation power unit, which is connected to the internal circulation pipeline. This circulation power unit provides circulation power to the heat transfer medium within the internal circulation pipeline, ensuring continuous circulation of the heat transfer medium and allowing the heat exchange components to continuously heat the battery cell module. This keeps the battery cell module within a suitable temperature range, thereby reducing energy loss and improving the energy utilization rate within the battery cell module.

[0042] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0043] The following provides a detailed description of the specific structure of the aforementioned energy storage cabinet and various possible implementation methods.

[0044] Figure 1 This is a structural schematic diagram of an energy storage cabinet 100 provided in an embodiment of this application. Figure 2 for Figure 1 A partial structural diagram of the internal structure of the cabinet 170 of the energy storage cabinet 100. Figure 3 for Figure 1 A schematic diagram showing the connection relationship between the internal circulation system 130, the evaporator 150, and the external circulation system 160 of the energy storage cabinet 100. Figure 4 This is a schematic diagram of the battery cell module 110. Figure 5 for Figure 1 A structural diagram of cabinet 170 of the energy storage cabinet 100.

[0045] See Figure 1, Figure 2 , Figure 3 , Figure 4 and Figure 5 The energy storage cabinet 100 includes a battery cell module 110, a heat exchange assembly 120, and an internal circulation system 130. The battery cell module 110 is connected to the heat exchange assembly 120; the internal circulation system 130 includes an internal circulation pipeline 131, a circulation power unit 132, and a heating device 133; the heat exchange assembly 120 and the circulation power unit 132 are both connected to the internal circulation pipeline 131; the heating device 133 is connected to the internal circulation pipeline 131.

[0046] In this embodiment, the energy storage cabinet 100 includes a battery module 110, a heat exchange assembly 120, and an internal circulation system 130. The battery module 110 stores electrical energy to achieve energy storage. Since the battery module 110 is connected to the heat exchange assembly 120, it can absorb heat provided by the heat exchange assembly 120. The internal circulation system 130 includes an internal circulation pipe 131 and a heating device 133. The heat exchange assembly 120 is connected to the internal circulation pipe 131, and the heating device 133 is also connected to the internal circulation pipe 131. Thus, the heat generated by the heating device 133 can be transferred to the heat-conducting medium in the internal circulation pipe 131, and then the heat-conducting medium in the internal circulation pipe 131 transports the heat to the heat exchange assembly 120, and finally, the heat exchange assembly 120 transfers the heat to the battery module 110.

[0047] Since the internal circulation system 130 also includes a circulation power device 132, which is connected to the internal circulation pipeline 131, the circulation power device 132 can provide circulation power to the heat transfer medium in the internal circulation pipeline 131, so that the heat transfer medium can continuously circulate in the internal circulation pipeline 131, thereby enabling the heat exchange component 120 to continuously heat the battery cell module 110. This allows the battery cell module 110 to remain within a suitable temperature range, thereby reducing the power loss of the battery cell module 110 and improving the utilization rate of power within the battery cell module 110.

[0048] It should be noted that the above-mentioned circulating power device 132 can be a circulating pump or a turbine, or other types of circulating power device 132. This application embodiment does not limit this.

[0049] It should also be noted that the heat transfer medium in the aforementioned internal circulation pipe 131 can be water or oil, or other types of heat transfer medium, and this application embodiment does not limit this.

[0050] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The energy storage cabinet 100 includes a module temperature detection element 140 and a control component. The module temperature detection element 140 is connected to the cell module 110. Both the module temperature detection element 140 and the heating device 133 are electrically connected to the control component. The module temperature detection element 140 is used to detect the temperature of the cell module 110 and send the detected temperature value to the control component.

[0051] The control component is configured to: turn on the heating device 133 when the detected temperature value is less than the lowest temperature value of the preset temperature range; and turn off the heating device 133 when the detected temperature value is greater than or equal to the lowest temperature value of the preset temperature range.

[0052] The aforementioned preset temperature range is pre-set within the control component based on the applicable temperature range of the battery cell module 110. When the control component receives a detected temperature value, it compares it with this preset temperature range. If the detected temperature value is lower than the minimum temperature value of the preset temperature range, it indicates that the ambient temperature of the battery cell module 110 is low, and the control component controls the heating device 133 to turn on. If the detected temperature value is greater than or equal to the minimum temperature value of the preset temperature range, it indicates that the ambient temperature of the battery cell module 110 is high, and the control component controls the heating device 133 to turn off. This enables the heating device 133 to automatically turn on or off, thus achieving the automatic heating function of the battery cell module 110.

[0053] It should be noted that the temperature detection element 140 of the module can be a thermometer or a thermistor, or other types of temperature detection devices. This application embodiment does not limit this.

[0054] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The heating device 133 includes a heating wire 1331, which is wound around the internal circulation pipe 131; the heating wire 1331 is electrically connected to the control component.

[0055] Since the heating wire 1331 is a common heating element with low cost and mature technology, the manufacturing cost of the heating device 133 can be reduced, thus reducing the manufacturing cost of the energy storage cabinet 100. Because the heating wire 1331 is wound around the inner circulation pipe 131, the inner circulation pipe 131 can be heated evenly along its circumference, thereby ensuring even heating of the heat-conducting medium within the inner circulation pipe 131 and increasing the heating speed of the heat-conducting medium within the inner circulation pipe 131. Since the heating wire 1331 is electrically connected to the control component, the heating wire 1331 can be automatically turned on or off, thus enabling automatic heating of the battery cell module 110.

[0056] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The internal circulation system 130 includes a liquid replenishment component 134, and the internal circulation pipeline 131 is connected to the liquid replenishment component 134. Along the flow direction of the heat-conducting medium in the internal circulation pipeline 131, the liquid replenishment component 134 is located upstream of the heating device 133.

[0057] Since the internal circulation pipe 131 is connected to the liquid replenishment component 134, when the amount of heat transfer medium in the internal circulation pipe 131 is insufficient, the heat transfer medium can be replenished to the internal circulation pipe 131 in a timely manner through the liquid replenishment component 134, thereby ensuring that the heat transfer medium in the internal circulation pipe 131 is in a sufficient state, thus ensuring the heating effect.

[0058] Because the replenishment component 134 is located upstream of the heating device 133 along the flow direction of the heat transfer medium in the internal circulation pipe 131, the heat transfer medium can be replenished before being heated during the circulation process. This achieves the effect of replenishing the heat transfer medium before heating, preventing the low-temperature heat transfer medium from entering the heat exchange component 120, thus improving the heating effect of the heat exchange component 120 on the battery cell module 110.

[0059] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The fluid replenishment assembly 134 includes an elastic container 1341 and a fluid replenishment pipe 1342. The volume of the elastic container 1341 can spontaneously decrease. Both the internal circulation pipe 131 and the fluid replenishment pipe 1342 are connected to the elastic container 1341.

[0060] In this embodiment, the elastic container 1341 can temporarily store replenished heat-conducting medium. When it is necessary to replenish the heat-conducting medium inside the internal circulation pipeline 131, the heat-conducting medium is first transported to the elastic container 1341 for temporary storage through the replenishment pipe 1342, and then the heat-conducting medium is replenished into the internal circulation pipeline 131 through the elastic container 1341.

[0061] The volume of the elastic container 1341 can spontaneously decrease. Specifically, the elastic container 1341 includes an outer container shell 13411 and an elastic gas container 13412 located inside the outer container shell 13411. The elastic gas container 13412 is filled with a certain amount of gas, and the elastic gas container 13412 and the outer container shell 13411 enclose a variable-volume heat-conducting medium cavity 13413, which is used to temporarily store the heat-conducting medium and is connected to the interior of the internal circulation pipeline 131.

[0062] When the liquid pressure in the inner circulation pipe 131 is less than the liquid pressure in the heat transfer medium cavity 13413, the elastic gas container 13412 expands, thereby reducing the volume of the heat transfer medium cavity 13413. At this time, the heat transfer medium is forced into the inner circulation pipe 131, replenishing the heat transfer medium in the inner circulation pipe 131. When the liquid pressure in the inner circulation pipe 131 is equal to the liquid pressure in the heat transfer medium cavity 13413, the volume of the elastic gas container 13412 remains unchanged, thereby keeping the volume of the heat transfer medium cavity 13413 unchanged. At this time, the heat transfer medium is not forced into the inner circulation pipe 131, and the heat transfer medium in the inner circulation pipe 131 is in a sufficient state.

[0063] It should be noted that a ball valve 13421 is provided on the above-mentioned replenishment tube 1342 to control the opening or closing of the replenishment tube 1342.

[0064] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The energy storage cabinet 100 includes an evaporator 150 and an external circulation system 160; both the internal circulation system 130 and the external circulation system 160 are connected to the evaporator 150, and the external circulation system 160 is used to absorb heat from the internal circulation system 130 through the evaporator 150.

[0065] When the external circulation system 160 absorbs heat from the internal circulation system 130 through the evaporator 150, the temperature of the heat-conducting medium in the internal circulation pipe 131 is reduced, which in turn reduces the temperature of the heat exchange component 120. This lowers the temperature of the battery cell module 110, facilitating heat dissipation. Even in hot summer weather, this ensures the battery cell module 110 remains within a suitable temperature range, preventing damage and fire hazards, thus enhancing the safety of the energy storage cabinet 100.

[0066] It should be noted that the above-mentioned operating mode of the energy storage cabinet 100 is the cooling mode for the battery cell module 110. At this time, the heat exchange component 120 is a liquid cooling plate, and the heat transfer medium is coolant.

[0067] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The external circulation system 160 includes an external circulation pipe 161 filled with refrigerant; the evaporator 150 includes a heat exchange chamber 151. The first heat exchange section 1311 of the internal circulation pipe 131 and the second heat exchange section 1611 of the external circulation pipe 161 are both located within the heat exchange chamber 151; the second heat exchange section 1611 is used to absorb heat from the first heat exchange section 1311 through the heat exchange chamber 151.

[0068] In this embodiment, when the refrigerant in the external circulation pipe 161 enters the second heat exchange section 1611, it can absorb the heat of the first heat exchange section 1311 through the heat exchange cavity 151. This can reduce the temperature of the heat-conducting medium in the internal circulation pipe 131, thereby reducing the temperature of the heat exchange component 120, and thus reducing the temperature of the battery cell module 110.

[0069] Since both the first heat exchange section 1311 of the internal circulation pipe 131 and the second heat exchange section 1611 of the external circulation pipe 161 are located within the heat exchange cavity 151, the heat exchange between the internal circulation pipe 131 and the external circulation pipe 161 is concentrated within the heat exchange cavity 151. This reduces heat loss during the heat exchange process and thus improves the heat exchange rate. Simultaneously, it also prevents the heat released from the internal circulation pipe 131 from adversely affecting other parts of the energy storage cabinet 100.

[0070] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The internal circulation system 130 includes a first inlet temperature sensor 135 and a first outlet temperature sensor 136. The first inlet temperature sensor 135 is connected to the inlet end of the first heat exchange section 1311, and the first outlet temperature sensor 136 is connected to the outlet end of the first heat exchange section 1311. Both the first inlet temperature sensor 135 and the first outlet temperature sensor 136 are electrically connected to the control component.

[0071] In this way, the first inlet temperature detector 135 can detect the first inlet temperature at the inlet end of the first heat exchange section 1311, and the first outlet temperature detector 136 can detect the first outlet temperature at the outlet end of the first heat exchange section 1311. The difference between the first inlet temperature and the first outlet temperature can reflect the heat absorption capacity of the heat exchange component 120 and the heat dissipation effect of the battery cell module 110. Therefore, it is convenient for technicians to adjust and monitor the working status of the energy storage cabinet 100.

[0072] In addition, on the internal circulation pipeline 131, an inlet pressure probe 1312 is installed at the position of the first inlet temperature detection element 135, and an outlet pressure probe 1313 is installed at the position of the first outlet temperature detection element 136.

[0073] Alternatively, the external circulation system 160 includes a second inlet temperature sensor 162 and a second outlet temperature sensor 163. The second inlet temperature sensor 162 is connected to the inlet end of the second heat exchange section 1611, and the second outlet temperature sensor 163 is connected to the outlet end of the second heat exchange section 1611.

[0074] In this way, the second inlet temperature sensor 162 can detect the second inlet temperature at the inlet end of the second heat exchange section 1611, and the second outlet temperature sensor 163 can detect the second outlet temperature at the outlet end of the second heat exchange section 1611. The difference between the second outlet temperature and the second inlet temperature can reflect the heat absorption capacity of the second heat exchange section 1611, thus facilitating technicians to adjust the operating status of the evaporator 150 and the external circulation system 160 in a timely manner. Therefore, it is convenient for technicians to adjust and monitor the operating status of the energy storage cabinet 100.

[0075] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The external circulation system 160 includes a compressor 164, which is connected to the external circulation pipeline 161. The compressor 164 can compress liquid refrigerant into high-temperature, high-pressure gaseous refrigerant.

[0076] Alternatively, the external circulation system 160 may include a condenser 165, which is connected to the external circulation pipeline 161. The condenser 165 is equipped with a fan that can expel the heat absorbed by the refrigerant from the energy storage cabinet 100, thereby turning the refrigerant into a low-temperature, high-pressure liquid.

[0077] Alternatively, the external circulation system 160 may include a pressure sensor 166, which is connected to the external circulation pipeline 161 and is used to detect the pressure of the refrigerant in the external circulation pipeline 161.

[0078] Alternatively, the external circulation system 160 may include a dryer filter 167, which is connected to the external circulation pipeline 161 and is used to remove moisture from the refrigerant.

[0079] Alternatively, the external circulation system 160 may include a needle valve 168, which is connected to the external circulation pipeline 161 and is used to precisely control the flow rate of refrigerant in the external circulation pipeline 161, thereby adjusting the cooling effect of the external circulation system 160.

[0080] Alternatively, the external circulation system 160 may include an expansion valve 169, which is connected to the external circulation pipeline 161 and is used to convert the refrigerant into a low-temperature, low-pressure liquid state.

[0081] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The energy storage cabinet 100 includes a cabinet 170, a battery cell module 110 and a heat exchange component 120, all of which are located inside the cabinet 170; the inner wall of the cabinet 170 is provided with a heat insulation layer 171.

[0082] In this embodiment, both the battery cell module 110 and the heat exchange component 120 are located within the cabinet 170. The cabinet 170 provides thermal insulation, thereby reducing the impact of external temperature on the battery cell module 110 and the heat exchange component 120. Furthermore, the cabinet 170 protects the battery cell module 110 and the heat exchange component 120, thus extending the service life of the energy storage cabinet 100. The inner wall of the cabinet 170 is provided with a thermal insulation layer 171, further enhancing its thermal insulation effect.

[0083] It should be noted that the material of the above-mentioned heat insulation layer 171 can be fireproof insulation cotton or other insulation materials with fireproof properties. This application embodiment does not limit this.

[0084] In addition, the energy storage cabinet 100 also includes multiple module placement cavities 180, which are located inside the cabinet 170 and arranged in sequence along the vertical direction. There are multiple battery cell modules 110, and each battery cell module 110 is placed in one module placement cavity 180.

[0085] The energy storage cabinet 100 also includes a liquid-cooled main unit 190, which is located inside the cabinet 170 and below the multiple module placement cavities 180. The aforementioned external circulation system 160 is entirely housed within the liquid-cooled main unit 190.

[0086] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0087] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0088] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something,” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “above something” or “on top of something,” but also “on something” or “on top of something” without an intermediate feature or layer therebetween, i.e., directly on something.

[0089] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations rotated 90° or be in other orientations, and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage cabinet, characterized by, The energy storage cabinet comprises: a battery cell module; a heat exchange assembly, the battery cell module being connected to the heat exchange assembly; an internal circulation system, the internal circulation system comprising an internal circulation pipeline, a circulation power device and a heating device; the heat exchange assembly and the circulation power device are both in communication with the internal circulation pipeline; the heating device is connected to the internal circulation pipeline.

2. The energy storage cabinet of claim 1, wherein, The energy storage cabinet comprises a module temperature detection member and a control assembly, the module temperature detection member being connected to the battery cell module; the module temperature detection member and the heating device are both electrically connected to the control assembly; the module temperature detection member is configured to detect the temperature of the battery cell module and send the detected temperature value to the control assembly; the control assembly is configured to control the heating device to be turned on when the detected temperature value is less than the minimum temperature value of a preset temperature range, and control the heating device to be turned off when the detected temperature value is greater than or equal to the minimum temperature value of the preset temperature range.

3. The energy storage cabinet of claim 2, wherein, The heating device comprises an electric heating wire, the electric heating wire being wound around the internal circulation pipeline; the electric heating wire is electrically connected to the control assembly.

4. The energy storage cabinet of claim 1, wherein, The internal circulation system comprises a liquid supplement assembly, the internal circulation pipeline being in communication with the liquid supplement assembly; along the flow direction of the heat-conducting medium in the internal circulation pipeline, the liquid supplement assembly is arranged upstream of the heating device.

5. The energy storage cabinet of claim 4, wherein, The liquid supplement assembly comprises an elastic container and a liquid supplement pipeline, the volume of the elastic container being capable of being spontaneously reduced; the internal circulation pipeline and the liquid supplement pipeline are both in communication with the elastic container.

6. The energy storage cabinet of any of claims 1-5, wherein, The energy storage cabinet comprises an evaporator and an external circulation system; the internal circulation system and the external circulation system are both connected to the evaporator, the external circulation system being configured to absorb the heat of the internal circulation system through the evaporator.

7. The energy storage cabinet of claim 6, wherein, The external circulation system comprises an external circulation pipeline, the external circulation pipeline being filled with a refrigerant; the evaporator comprises a heat exchange cavity; a first heat exchange section of the internal circulation pipeline and a second heat exchange section of the external circulation pipeline are both located in the heat exchange cavity; the second heat exchange section is configured to absorb the heat of the first heat exchange section through the heat exchange cavity.

8. The energy storage cabinet of claim 7, wherein, The internal circulation system comprises a first inlet temperature detection member and a first outlet temperature detection member, the first inlet temperature detection member being in communication with the inlet end of the first heat exchange section, and the first outlet temperature detection member being in communication with the outlet end of the first heat exchange section; and / or, the external circulation system comprises a second inlet temperature detection member and a second outlet temperature detection member, the second inlet temperature detection member being in communication with the inlet end of the second heat exchange section, and the second outlet temperature detection member being in communication with the outlet end of the second heat exchange section.

9. The energy storage cabinet of claim 7, wherein, The external circulation system comprises a compressor, the compressor being in communication with the external circulation pipeline; The external circulation system comprises a condenser, the condenser being in communication with the external circulation pipeline; The external circulation system comprises a pressure sensor, the pressure sensor being in communication with the external circulation pipeline; and / or, the external circulation system comprises a drying filter, the drying filter being in communication with the external circulation pipeline.

10. The energy storage cabinet of any of claims 1-5 or 7-9, wherein, The energy storage cabinet comprises a cabinet body, the battery cell module and the heat exchange assembly are located in the cabinet body, and an inner wall of the cabinet body is provided with a heat insulation layer.

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