Energy storage module and energy storage system

Abstract

The application discloses an energy storage module and an energy storage system, and belongs to the battery field.The energy storage module comprises a shell forming a first cabin, a battery cell unit installed in the first cabin, and a heat conduction assembly installed between the side wall of the first cabin and the battery cell unit, wherein the heat conduction assembly is provided with a phase change medium.The heat generated by the battery cell unit is transferred to the shell through heat conduction and then exchanged with the outside, so that the heat conduction and heat dissipation effects are good, the temperature of the battery cell unit is well controlled, the service life of the battery cell unit is long, the stable operation of the energy storage module is facilitated, and the overall structural strength of the energy storage module is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to an energy storage module and energy storage system. Background Technology

[0002] Energy storage systems are widely used, and energy storage modules are the core components. As the capacity of the battery cells in energy storage modules gradually increases, the heat generated by the battery cells also increases significantly. Poor heat dissipation of energy storage modules will reduce the lifespan of the battery cells and affect the safety of the energy storage system. Utility Model Content

[0003] This application aims to solve at least one of the technical problems existing in related technologies. To this end, this application proposes an energy storage module and energy storage system with good heat dissipation performance.

[0004] In a first aspect, this application provides an energy storage module, comprising:

[0005] The outer shell forms the first compartment;

[0006] The battery cell unit is installed in the first compartment;

[0007] A heat-conducting component is installed between the side wall of the first compartment and the battery cell unit. The heat-conducting component has a cavity, and a phase change medium is disposed in the cavity.

[0008] According to the energy storage module of this application, by setting a heat-conducting component between the cell unit and the outer casing, the heat generated by the cell unit is transferred to the outer casing through heat conduction and then exchanged with the outside. The heat conduction and heat dissipation effects are better, the cell unit temperature is better controlled, the cell unit life is longer, which helps the energy storage module to work stably, and at the same time improves the overall structural strength of the energy storage module.

[0009] According to one embodiment of this application, the heat-conducting component includes a first heat-conducting part and a second heat-conducting part, the first heat-conducting part exchanges heat with the inner wall of the outer shell, the second heat-conducting part exchanges heat with the battery cell, and the phase change medium exchanges heat between the first heat-conducting part and the second heat-conducting part.

[0010] According to the energy storage module of this application, by setting a first heat-conducting part to exchange heat with the inner wall of the outer shell and a second heat-conducting part to exchange heat with the battery cell, the heat of the battery cell is transferred to the air through the outer shell, and the heat dissipation effect is good.

[0011] According to one embodiment of this application, a capillary structure is provided on the side wall of the second heat-conducting part away from the battery cell.

[0012] According to the energy storage module of this application, the uniformity of heat dissipation of the battery cell unit is ensured by setting a capillary structure on the side wall of the second heat-conducting part.

[0013] According to one embodiment of this application, the heat-conducting component further includes a first connecting portion, which is connected between the first heat-conducting portion and the second heat-conducting portion. The first heat-conducting portion has a first channel, the second heat-conducting portion has a second channel, and the first connecting portion has a third channel. The third channel is used to connect the first channel and the second channel. The phase change medium is disposed in the first channel, the second channel, and the third channel.

[0014] According to the energy storage module of this application, by providing a first connecting part between the first heat-conducting part and the second heat-conducting part, it is convenient to allow the phase change medium in the first heat-conducting part and the second heat-conducting part to circulate, accelerate heat conduction, reduce the temperature rise of the battery cell, and increase the life of the battery cell.

[0015] According to one embodiment of this application, the first connecting portion includes a plurality of connecting members connected between the first heat-conducting portion and the second heat-conducting portion; wherein...

[0016] One end of the connector is connected to the first heat-conducting part, and the other end of the connector is connected to the second heat-conducting part. The connector has an angle with the first heat-conducting part and the second heat-conducting part in a first direction, and two adjacent connectors are connected end to end.

[0017] Alternatively, the plurality of connectors are divided into two groups, each group including a plurality of connectors arranged in parallel and spaced apart, with at least some of the connectors in different groups being arranged crosswise;

[0018] Alternatively, the plurality of connectors may include a first connector and a second connector, wherein the second connector comprises at least two connectors, one end of the first connector is connected to the first heat-conducting part, the other end of the first connector is connected to one end of the second connector, and the other end of the second connector is connected to the second heat-conducting part.

[0019] According to the energy storage module of this application, by setting the connection method of the connector of the first connection part, the weight of the energy storage module can be reduced and the cost can be saved while ensuring the heat conduction effect.

[0020] According to one embodiment of this application, the heat-conducting component further includes a heat pipe, one end of which is connected to the first heat-conducting part and the other end of which is connected to the second heat-conducting part. The heat pipe has the cavity, and a phase change medium is disposed in the cavity.

[0021] According to the energy storage module of this application, by setting a heat pipe between the first heat-conducting part and the second heat-conducting part, heat conduction is accelerated, the temperature rise of the battery cell is reduced, and the life of the battery cell is increased.

[0022] According to one embodiment of this application, the heat-conducting component further includes a second connecting portion, and the heat pipe is installed in the second connecting portion.

[0023] According to the energy storage module of this application, the connection strength of the heat pipe is improved by installing the heat pipe in the second connection part.

[0024] According to one embodiment of this application, the first heat-conducting part includes a condenser, the second heat-conducting part includes an evaporator, one end of the condenser exchanges heat with the evaporator, the other end of the condenser exchanges heat with the inner wall of the outer shell, the evaporator exchanges heat with the battery cell unit, and the phase change medium is provided in the cavity communicating between the evaporator and the condenser.

[0025] According to the energy storage module of this application, by setting up a condenser and an evaporator, the temperature rise of the battery cell is reduced more efficiently, and the life of the battery cell is improved.

[0026] According to one embodiment of this application, it further includes a conductive element, wherein the conductive element is disposed between the battery cell and the heat-conducting component; and / or, the conductive element is disposed between the heat-conducting component and the inner wall of the housing; and / or, the conductive element is disposed between the battery cell and the bottom wall of the housing.

[0027] According to the energy storage module of this application, by setting conductive components between the battery cell unit and the heat-conducting component, between the heat-conducting component and the inner wall of the outer shell, and between the battery cell unit and the bottom wall of the outer shell, an efficient heat transfer path is established, the heat exchange area is increased, the thermal resistance is reduced, and the heat exchange is enhanced. At the same time, heat dissipation is achieved through the bottom wall and side wall of the outer shell, resulting in good heat dissipation effect.

[0028] According to one embodiment of this application, the outer casing further forms a second compartment separated from the first compartment, and the energy storage module further includes:

[0029] A radiator is mounted on the outer casing and extends into the second compartment;

[0030] Electrical components are installed in the second compartment and are cooled by the radiator. The electrical components are electrically connected to the battery cell unit.

[0031] According to the energy storage module of this application, by setting up a second compartment, the electrical components and the battery cell units are installed separately and heat dissipated independently, resulting in better heat dissipation.

[0032] According to one embodiment of this application, the electrical component includes a power device and a circuit board, the heat sink includes fins and a substrate, the circuit board is mounted on the inner wall of the first compartment, the substrate is provided with a boss, the boss exchanges heat with the power device, and the fins are used for heat exchange with the outside.

[0033] According to the energy storage module of this application, by setting the protrusion of the heat sink to extend into the second compartment and contact the power device, the heat dissipation of the electrical components is enhanced, the impact of the electrical components on the battery cell is reduced, the temperature control of the battery cell is better, and the battery cell life is longer.

[0034] Secondly, this application provides an energy storage system, which includes:

[0035] At least one energy storage module as described in any of the above.

[0036] The energy storage system according to this application increases the energy storage capacity by connecting multiple energy storage modules, resulting in higher energy density and a smaller footprint.

[0037] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0038] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application;

[0040] Figure 2 This is one of the cross-sectional views of the energy storage module provided in the embodiments of this application;

[0041] Figure 3 This is a second cross-sectional view of the energy storage module provided in the embodiments of this application;

[0042] Figure 4 This is the third cross-sectional view of the energy storage module provided in the embodiments of this application;

[0043] Figure 5 This is the fourth cross-sectional view of the energy storage module provided in the embodiments of this application;

[0044] Figure 6 This is the fifth cross-sectional view of the energy storage module provided in the embodiments of this application;

[0045] Figure 7 This is the sixth cross-sectional view of the energy storage module provided in the embodiments of this application;

[0046] Figure 8 This is the seventh cross-sectional view of the energy storage module provided in the embodiments of this application;

[0047] Figure 9 This is the eighth cross-sectional view of the energy storage module provided in the embodiments of this application;

[0048] Figure 10This is the ninth cross-sectional view of the energy storage module provided in the embodiments of this application;

[0049] Figure 11 This is one of the structural schematic diagrams of the heat-conducting component provided in the embodiments of this application;

[0050] Figure 12 This is a second schematic diagram of the structure of the heat-conducting component provided in the embodiments of this application (the outer shell is not shown in the figure);

[0051] Figure 13 This is a schematic diagram of the structure of the heat sink provided in the embodiment of this application;

[0052] Figure 14 This is a cross-sectional view of the first compartment provided in the embodiments of this application.

[0053] Figure label:

[0054] Energy storage system 1;

[0055] 1000 energy storage modules;

[0056] The outer shell is 100, the first compartment is 110, and the second compartment is 120.

[0057] 200 battery cells;

[0058] The heat-conducting component 300 includes a first heat-conducting part 310, a condenser 311, a condensing plate 3111, a collector cavity 3112, a second heat-conducting part 320, an evaporator 321, a first connecting part 330, a second connecting part 340, and a heat pipe 341.

[0059] Transmission component 400;

[0060] Heat sink 500, fins 510, base plate 520, boss 521;

[0061] Electrical components 600, power devices 610, circuit boards 620. Detailed Implementation

[0062] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0063] The principle of the energy storage module 1000 proposed in this application will be explained in detail below:

[0064] Among related technologies, energy storage systems are widely used, and battery modules are a core component. As the capacity of battery module cells gradually increases, the heat generated by the cells also increases significantly. Poor heat dissipation of battery modules will reduce the lifespan of the cells and affect the safety of energy storage systems.

[0065] To address this technical problem, this application provides an energy storage module 1000, as described below. Figures 1-14 This application describes an energy storage module 1000 according to an embodiment of the present application.

[0066] like Figures 2-10 As shown, the energy storage module 1000 of this application embodiment includes: a housing 100, a battery cell unit 200, and a heat-conducting component 300.

[0067] The outer casing 100 can be made of materials such as aluminum alloy, stainless steel, composite materials or plastic. In this embodiment, the outer casing 100 can be made of aluminum alloy. The outer casing 100 made of aluminum alloy is lightweight, has good thermal conductivity and strong corrosion resistance.

[0068] like Figure 2 and Figure 3 As shown, the outer casing 100 forms the first compartment 110, and the battery cell unit 200 is installed in the first compartment 110.

[0069] The battery cell unit 200 can be a single battery cell or a battery cell module composed of multiple battery cells. In this embodiment, the battery cell unit 200 is installed in the first compartment 110 and is connected to the bottom wall of the outer casing 100, allowing for heat dissipation through the bottom wall of the outer casing 100.

[0070] When the cell unit 200 is a single cell and multiple single cells are installed in the first compartment 110, the energy storage module 1000 forms a cell module; when the cell unit 200 is a cell module and multiple cell modules are installed in the first compartment 110, the energy storage module 1000 forms a battery pack.

[0071] The heat-conducting component 300 is installed between the side wall of the first compartment 110 and the battery cell unit 200. The heat generated by the battery cell unit 200 is transferred to the outer surface of the outer shell 100 through the heat-conducting component 300. Then, the heat is transferred to the external environment through natural convection heat exchange between the outer shell 100 and the external environment. Finally, the heat of the battery cell unit 200 is transferred to the external environment.

[0072] It should be noted that the heat-conducting component 300 can be installed on the side wall of the first compartment 110, which is the inner wall of the first compartment 110 with the larger area corresponding to the battery cell unit 200. The contact area between the heat-conducting component 300 and the side wall of the first compartment 110 and the battery cell unit 200 is large, resulting in good heat conduction effect.

[0073] The heat-conducting component 300 has a cavity, and a phase change medium is disposed inside the cavity.

[0074] The phase change medium can be organic phase change materials, inorganic phase change materials, or composite phase change materials, etc. It can be a liquid-gas phase change medium, a solid-liquid phase change medium, or a solid-solid phase change medium, etc. No specific limitation is made in this embodiment. The following embodiment uses a liquid-gas phase change medium to introduce the phase change heat dissipation principle.

[0075] In related technologies, energy storage systems are widely used, and battery modules are a core component. As the capacity of battery module cells gradually increases, the heat generated by the cells also increases significantly. The heat dissipation of battery modules mainly relies on natural air cooling, that is, the heat of the cells is first conducted to the outer surface of the casing, and then the outer surface of the casing exchanges heat with the external environment through convection. The heat dissipation effect of battery modules is poor, which will reduce the life of the cells and affect the safety of energy storage systems.

[0076] In this embodiment, the energy storage module 1000 has a first compartment 110 formed by the outer shell 100. The battery cell 200 is installed on the bottom wall of the first compartment 110. A heat-conducting component 300 is provided between the battery cell 200 and the side wall of the outer shell 100. The heat-conducting component 300 contains a phase change medium. During the phase change process, the phase change medium can absorb or release a large amount of heat. The energy that a unit mass of phase change medium can store is much higher than that of traditional heat dissipation materials such as water or air. The heat generated by the battery cell 200 is transferred to the heat-conducting component 300. The heat-conducting component 300 absorbs the heat from the battery cell 200 and transfers the heat to the outer shell 100, where it is then exchanged into the outside air. The heat dissipation effect is good. At the same time, heat dissipation is carried out through the bottom wall and side wall of the outer shell 100, which increases the heat exchange area of ​​the battery cell 200, enhances the heat exchange effect, and improves the overall structural strength of the energy storage module 1000.

[0077] According to the energy storage module 1000 provided in the embodiments of this application, a heat-conducting component 300 is provided between the battery cell 200 and the outer casing 100. The heat-conducting component 300 contains a phase change medium. The liquid phase change medium absorbs the heat generated by the battery cell 200 and changes phase to gas. The gaseous phase change medium transfers heat to the outer casing 100 through thermal conduction. The outer casing 100 exchanges heat with the outside environment, and the gaseous phase change medium condenses into a liquid phase change medium, which cyclically absorbs the heat generated by the battery cell 200. The heat conduction and heat dissipation effects are good, the temperature control of the battery cell 200 is good, and the lifespan of the battery cell 200 is long, which helps the energy storage module 1000 to work stably and improves the overall structural strength of the energy storage module 1000.

[0078] In some embodiments, such as Figures 3-10 As shown, the heat-conducting component 300 may include a first heat-conducting part 310 and a second heat-conducting part 320.

[0079] The first heat-conducting part 310 exchanges heat with the inner wall of the outer casing 100, the second heat-conducting part 320 exchanges heat with the battery cell unit 200, and the phase change medium exchanges heat between the first heat-conducting part 310 and the second heat-conducting part 320.

[0080] The heat exchange between the first heat-conducting part 310 and the inner wall of the outer shell 100 can be either contact heat exchange or non-contact heat exchange. The heat exchange between the second heat-conducting part 320 and the battery cell unit 200 can be either contact heat exchange or non-contact heat exchange. No specific restrictions are imposed in this embodiment.

[0081] The first heat-conducting part 310 and the second heat-conducting part 320 have cavities, and a phase change medium is disposed in the cavity. In this embodiment, the phase change medium flows between the first heat-conducting part 310 and the second heat-conducting part 320.

[0082] The cavity of the first heat-conducting part 310 and the cavity of the second heat-conducting part 320 can be connected together by welding or other connection methods, so that the cavity inside the heat-conducting component 300 can be a whole chamber or multiple small chambers separated by partitions, and the small chambers are interconnected.

[0083] It is understandable that the heat exchange method of the first heat-conducting part 310 can be the same as or different from that of the second heat-conducting part 320, depending on the actual application scenario.

[0084] According to the energy storage module 1000 provided in the embodiments of this application, by setting a first heat-conducting part 310 to exchange heat with the inner wall of the outer shell 100, and a second heat-conducting part 320 to exchange heat with the battery cell 200, the liquid phase change medium in the cavity of the second heat-conducting part 320 absorbs the heat of the battery cell 200 and changes phase to gas. The gaseous phase change medium enters the cavity of the first heat-conducting part 310, transfers heat to the outer shell 100 and condenses into liquid phase change medium and returns to the cavity of the second heat-conducting part 320. This cycle is repeated to transfer the heat of the battery cell 200 to the air through the outer shell 100, resulting in a good heat dissipation effect.

[0085] In some embodiments, a capillary structure is provided on the side wall of the second heat-conducting portion 320 away from the battery cell unit 200.

[0086] Capillary structures can be either capillaries or capillary fibers.

[0087] Understandably, the liquid working fluid can be circulated by using a capillary structure on the sidewall of the second heat-conducting part 320, thereby improving heat dissipation efficiency.

[0088] According to the energy storage module 1000 provided in the embodiments of this application, the uniformity of heat dissipation of the battery cell unit 200 is ensured by providing a capillary structure on the side wall of the second heat-conducting part 320.

[0089] In some embodiments, such as Figures 5-10As shown, the heat-conducting component 300 may also include a first connecting portion 330.

[0090] The first connecting part 330 is connected between the first heat-conducting part 310 and the second heat-conducting part 320.

[0091] The first heat-conducting part 310 has a first channel, the second heat-conducting part 320 has a second channel, and the first connecting part 330 has a third channel. The third channel is used to connect the first channel and the second channel. The first channel, the second channel and the third channel contain a phase change medium.

[0092] In this embodiment, the first connecting part 330 can be a connecting rib, the first heat-conducting part 310 and the second heat-conducting part 320 can be heat-conducting plates, the connecting rib is connected between the two heat-conducting plates, the first heat-conducting part 310 is provided with a first channel, the second heat-conducting part 320 is provided with a second channel, and the connecting rib is provided with a third channel. The third channel is used to connect the first channel and the second channel. The first channel, the second channel and the third channel are provided with a phase change medium. The phase change medium in the second channel absorbs heat and changes from one state of matter to another state of matter (such as liquid to gas). It flows to the first channel through the third channel, releases heat and condenses in the first channel to change back to the original state of matter (such as gas to liquid), and then flows back to the second channel through the third channel, accelerating the transfer of heat from the battery cell 200 to the outside.

[0093] According to the energy storage module 1000 provided in the embodiments of this application, by providing a first connecting part 330 between the first heat-conducting part 310 and the second heat-conducting part 320, it is convenient to allow the phase change medium in the first heat-conducting part 310 and the second heat-conducting part 320 to circulate, accelerate heat conduction, reduce the temperature rise of the battery cell 200, and increase the lifespan of the battery cell 200.

[0094] In some embodiments, the first connection portion 330 may include a plurality of connectors connected between the first heat-conducting portion 310 and the second heat-conducting portion 320.

[0095] The cross-section of the first connecting part 330 can be of various shapes.

[0096] In this embodiment, the first connecting portion 330 can be a connecting rib.

[0097] The first connecting portion 330 can be at least one of the following structures:

[0098] Firstly, such as Figure 9 and Figure 10 As shown, the projection of the cross-section of the first connecting part 330 at the bottom can be multiple triangles.

[0099] In this embodiment, one end of the connector is connected to the first heat-conducting part 310, and the other end of the connector is connected to the second heat-conducting part 320. The connector, the first heat-conducting part 310, and the second heat-conducting part 320 have an angle in the first direction, and two adjacent connectors are connected end to end.

[0100] In this embodiment, the first direction can be the length direction of the first heat-conducting part 310 and the second heat-conducting part 320, and the included angle is the acute angle between the connector and the first heat-conducting part 310 and the second heat-conducting part 320 in the first direction.

[0101] Secondly, such as Figure 7 and Figure 8 As shown, the projection of the cross-section of the first connecting part 330 at the bottom can be multiple rectangles.

[0102] In this embodiment, the multiple connectors are divided into two groups, each group including multiple connectors arranged in parallel and spaced apart, and at least some of the connectors in different groups are arranged crosswise.

[0103] In this embodiment, all connectors in different groups can be arranged in a cross-sectional manner.

[0104] The first connecting part 330 is composed of multiple connecting ribs, and after connection, the first connecting part 330 is grid-like in the height direction.

[0105] Thirdly, such as Figure 5 and Figure 6 As shown, the projection of the cross-section of the first connecting part 330 at the bottom can be multiple herringbone shapes.

[0106] In this embodiment, the plurality of connectors includes a first connector and a second connector. The second connector consists of at least two connectors. One end of the first connector is connected to the first heat-conducting part 310, the other end of the first connector is connected to one end of the second connector, and the other end of the second connector is connected to the second heat-conducting part 320.

[0107] The first connecting part 330 can be formed by connecting multiple herringbone-shaped connecting ribs.

[0108] In some embodiments, the cross-section of the connecting rib may also be of other shapes. According to the energy storage module 1000 provided in the embodiments of this application, by setting the cross-sectional shape of the first connecting part 330, the weight of the energy storage module 1000 can be reduced and costs can be saved while ensuring the heat conduction effect.

[0109] In some embodiments, the thermally conductive component 300 may further include a heat pipe 341.

[0110] One end of the heat pipe 341 is connected to the first heat-conducting part 310, and the other end of the heat pipe 341 is connected to the second heat-conducting part 320.

[0111] Heat pipe 341 has a cavity, and a phase change medium is placed inside the cavity.

[0112] In this embodiment, the first heat-conducting part 310 and the second heat-conducting part 320 are heat-conducting plates, and the heat pipe 341 is located between the first heat-conducting part 310 and the second heat-conducting part 320. The phase change medium is disposed inside the heat pipe 341. The heat pipe 341 is added to the heat transfer path between the battery cell unit 200 and the external environment. The heat pipe 341 absorbs the heat at the second heat-conducting part 320 and transfers it to the first heat-conducting part 310. The first heat-conducting part 310 then transfers the heat to the outer shell 100. The outer shell 100 and the external environment undergo convective heat exchange, which reduces the thermal resistance between the battery cell unit 200 and the external environment, enhances the heat exchange effect, and further improves the heat dissipation effect of the energy storage module 1000.

[0113] According to the energy storage module 1000 provided in the embodiments of this application, by setting a heat pipe 341 between the first heat-conducting part 310 and the second heat-conducting part 320, heat conduction is accelerated, the temperature rise of the battery cell 200 is reduced, and the lifespan of the battery cell 200 is increased.

[0114] In some embodiments, the thermally conductive component 300 may further include a second connection portion 340.

[0115] Heat pipe 341 is installed inside the second connection part 340.

[0116] like Figure 11 As shown, a heat pipe 341 is provided inside the second connecting part 340, and the second connecting part 340 is connected between the first heat-conducting part 310 and the second heat-conducting part 320.

[0117] In this embodiment, the second connecting part 340 can be a rib, and a heat pipe 341 is provided inside the rib. The rib is connected between the first heat-conducting part 310 and the second heat-conducting part 320. The heat pipe 341 is added to the heat transfer path between the battery cell unit 200 and the external environment. The heat generated by the battery cell unit 200 is transferred to the outer shell 100 through the second heat-conducting part 320, the heat pipe 341 and the first heat-conducting part 310. The outer shell 100 and the external environment undergo convective heat exchange, which reduces the thermal resistance between the battery cell unit 200 and the external environment, enhances the heat exchange effect, and further improves the heat dissipation effect of the energy storage module 1000.

[0118] like Figure 11 As shown, the first heat-conducting part 310 and the second heat-conducting part 320 may be provided with round holes for placing heat pipes 341. The number, size and shape of heat pipes 341 can be configured according to actual conditions.

[0119] like Figure 3 and Figure 4 As shown, the second connecting portions 340 can be spaced apart along the length direction of the heat-conducting component 300 or spaced apart along the width direction of the heat-conducting component 300.

[0120] According to the energy storage module 1000 provided in the embodiments of this application, the connection strength of the heat pipe 341 is improved by installing the heat pipe 341 on the second connection part 340.

[0121] In some embodiments, such as Figure 12 As shown, the first heat-conducting part 310 may include a condenser 311, and the second heat-conducting part 320 may include an evaporator 321.

[0122] like Figure 12 As shown, one end of the condenser 311 exchanges heat with the evaporator 321, and the other end of the condenser 311 exchanges heat with the inner wall of the outer shell 100 (not shown in the figure). The evaporator 321 exchanges heat with the battery cell unit 200. A phase change medium is provided in the cavity connecting the evaporator 321 and the condenser 311.

[0123] In this embodiment, the evaporator 321 has an internal cavity containing a phase change medium. The condenser 311 includes a collector cavity 3112 and a condenser plate 3111. The condenser plate 3111 has a flow cavity. The liquid phase change medium in the evaporator 321 can absorb heat and change phase to gas. It enters the collector cavity at the top of the condenser 311 through the collector port, condenses into liquid through the middle condenser plate 3111 (plate fins or harmonica tube), and then flows back to the evaporator 321 through the collector cavity 3112 by gravity. Fins can be provided between the multiple condenser plates 3111. Through heat exchange with the cooling medium (such as air or water), the condenser 311 can efficiently dissipate the heat in the phase change medium into the surrounding environment, thereby reducing the temperature inside the energy storage module 1000. According to the energy storage module 1000 provided in this application embodiment, by setting the condenser 311 and the evaporator 321, the temperature rise efficiency of the battery cell 200 is reduced significantly, and the lifespan of the battery cell 200 is improved.

[0124] In some embodiments, such as Figure 4 As shown, the energy storage module 1000 may also include a conductive element 400.

[0125] In this embodiment, a conductive element 400 is provided between the battery cell unit 200 and the heat-conducting component 300; and / or, a conductive element 400 is provided between the heat-conducting component 300 and the inner wall of the outer casing 100; and / or, a conductive element 400 is provided between the battery cell unit 200 and the bottom wall of the outer casing 100.

[0126] The conductive element 400 can be at least one of the following structural forms:

[0127] Firstly, a conductive element 400 is provided between the battery cell unit 200 and the heat-conducting component 300.

[0128] In this embodiment, the conductive element 400 is a thermally conductive material to ensure the fit between the battery cell unit 200 and the thermally conductive component 300 and reduce contact thermal resistance.

[0129] Secondly, a conductive element 400 is provided between the heat-conducting component 300 and the inner wall of the outer casing 100.

[0130] In this embodiment, the conductive element 400 is a thermally conductive material to ensure the fit between the thermally conductive component 300 and the side wall of the housing 100, thereby reducing contact thermal resistance.

[0131] It should be noted that, in this embodiment, the conductive element 400 is disposed on the inner wall of the outer casing 100 adjacent to the heat-conducting component 300, that is, the side wall is the inner wall of the outer casing 100 opposite to the heat-conducting component 300. Thirdly, a conductive element 400 is disposed between the battery cell unit 200 and the bottom wall of the outer casing 100.

[0132] In this embodiment, the conductive element 400 is a thermally conductive material to ensure the fit between the battery cell unit 200 and the bottom wall of the outer casing 100, thereby reducing contact thermal resistance.

[0133] It should be noted that in this embodiment, the conductive member 400 is disposed on the inner wall of the outer shell 100 adjacent to the inner wall of the heat-conducting component 300 that is in contact with the inner wall of the outer shell 100. That is, the bottom wall is the inner wall of the outer shell 100 adjacent to the inner wall of the heat-conducting component 300. The conductive member 400 is attached to the side of the battery cell unit 200 that is not in contact with the heat-conducting component 300.

[0134] In some embodiments, the conductor 400 can be a combination of two of the above three cases, or it can include all three cases at the same time, depending on the specific application.

[0135] Aerogel can be added between the battery cells 200 to provide fire protection and reduce the impact of thermal runaway of any battery cell 200 on the battery cells 200 on both sides. According to the energy storage module 1000 provided in this application embodiment, by setting conductive elements 400 between the battery cell 200 and the heat-conducting component 300, between the heat-conducting component 300 and the inner wall of the outer casing 100, and between the battery cell 200 and the bottom wall of the outer casing 100, an efficient heat transfer path is established, increasing the heat exchange area, reducing thermal resistance, and enhancing heat exchange. Simultaneously, heat dissipation is achieved through the bottom and side walls of the outer casing 100, resulting in good heat dissipation performance.

[0136] In some embodiments, the outer casing 100 may also include a second compartment 120.

[0137] like Figure 2 As shown, the outer shell 100 includes a first compartment 110 and a second compartment 120, which are separated from each other.

[0138] In this embodiment, the outer shell 100 adopts an integrated design to reduce the overall weight of the energy storage module 1000. The first compartment 110 and the second compartment 120 are separated by sheet metal. The outer shell 100 adopts an integrated compartment design, which can reduce the weight of the sheet metal.

[0139] The cell unit 200 is a battery pack composed of multiple cell modules, and the cell unit 200 is installed in the first compartment 110 to form a battery compartment.

[0140] The energy storage module 1000 also includes a radiator 500 and electrical components 600.

[0141] The radiator 500 is mounted on the outer casing 100 and extends into the second compartment 120.

[0142] Electrical component 600 is installed in the second compartment 120 to form an electrical compartment and is cooled by heat sink 500. Electrical component 600 is electrically connected to battery cell unit 200.

[0143] It is understandable that the battery cell unit 200 is installed in the first compartment 110 to form the battery compartment, and the electrical components 600 are installed in the second compartment 120 to form the electrical compartment. At this time, the energy storage module 1000 can be an energy storage container.

[0144] In this embodiment, the electrical component 600 is installed in the second compartment 120. The electrical component 600 generates a large amount of heat, and the temperature of the second compartment 120 is high. In order to prevent it from affecting the first compartment 110, heat insulation material can be placed on the sheet metal, and holes can be made on the sheet metal for electrical connection between the battery cell unit 200 of the first compartment 110 and the electrical component 600 of the second compartment 120.

[0145] According to the energy storage module 1000 provided in the embodiments of this application, by setting a second compartment 120, the electrical components 600 and the battery cell unit 200 are installed separately and independently for heat dissipation, resulting in better heat dissipation.

[0146] In some embodiments, such as Figure 13 and Figure 14 As shown, electrical component 600 may include power device 610 and circuit board 620, and heat sink 500 may include fins 510 and substrate 520.

[0147] Circuit board 620 is mounted on the inner wall of the first compartment 110, and power device 610 is mounted on circuit board 620.

[0148] The substrate 520 is provided with a boss 521, which exchanges heat with the power device 610, and the fins 510 are used to exchange heat with the outside world.

[0149] In this embodiment, the second compartment 120 is provided with an opening. The power devices 610 such as MOSFETs on the PCB circuit board 620 are cooled by a heat sink 500. The heat sink 500 extends into the second compartment 120 through the opening. The boss 521 of the heat sink 500 contacts the power devices 610 such as MOSFETs, transferring the heat generated by the electrical components 600 to the heat sink 500, and then transferring it to the external environment through the fins 510 of the heat sink 500.

[0150] In some embodiments, the MOSFET may include a copper substrate 520, and thermal grease may be added between the copper substrate 520 and the boss 521 of the heat sink 500 to reduce contact thermal resistance.

[0151] According to the energy storage module 1000 provided in the embodiments of this application, by setting the boss 521 of the heat sink 500 to extend into the second compartment 120 and contact the power device 610, the heat dissipation of the electrical component 600 is enhanced, the impact of the electrical component 600 on the battery cell unit 200 is reduced, the temperature control of the battery cell unit 200 is better, and the life of the battery cell unit 200 is longer.

[0152] This application also provides an energy storage system 1.

[0153] like Figure 1 As shown, the energy storage system 1 includes: an energy storage module 1000.

[0154] The energy storage module 1000 is the energy storage module 1000 described in the above embodiment.

[0155] There should be at least one energy storage module (1000).

[0156] In this embodiment, the heat dissipation of the battery cell 200 is achieved by heat exchange between the bottom and the side and the outer casing 100, which has multiple heat dissipation directions. The energy storage modules 1000 can be stacked. Multiple energy storage modules 1000 can be connected horizontally or stacked vertically, which increases the capacity of the energy storage system 1 while reducing the footprint.

[0157] like Figure 1 As shown, in this embodiment, there can be two energy storage modules 1000. The two energy storage modules 1000 can be connected horizontally or stacked vertically to improve energy density.

[0158] According to the energy storage system 1 provided in the embodiments of this application, by setting up multiple energy storage modules 1000 connected together, the capacity of the energy storage system 1 is increased, the energy density is high, and the footprint is small.

[0159] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0160] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0161] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0162] In the description of this application, "multiple" means two or more.

[0163] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0164] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0165] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0166] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An energy storage module, characterized in that, include: The outer shell (100) forms the first compartment (110); A battery cell unit (200) is installed in the first compartment (110); A heat-conducting component (300) is installed between the side wall of the first compartment (110) and the battery cell unit (200). The heat-conducting component (300) has a cavity in which a phase change medium is disposed.

2. The energy storage module according to claim 1, characterized in that, The heat-conducting component (300) includes a first heat-conducting part (310) and a second heat-conducting part (320). The first heat-conducting part (310) exchanges heat with the inner wall of the outer shell (100), and the second heat-conducting part (320) exchanges heat with the battery cell unit (200). The phase change medium exchanges heat between the first heat-conducting part (310) and the second heat-conducting part (320).

3. The energy storage module according to claim 2, characterized in that, The sidewall of the second heat-conducting part (320) away from the battery cell unit (200) is provided with a capillary structure.

4. The energy storage module according to claim 2, characterized in that, The heat-conducting component (300) further includes a first connecting part (330), which is connected between the first heat-conducting part (310) and the second heat-conducting part (320). The first heat-conducting part (310) has a first channel, the second heat-conducting part (320) has a second channel, and the first connecting part (330) has a third channel. The third channel is used to connect the first channel and the second channel. The phase change medium is disposed in the first channel, the second channel and the third channel.

5. The energy storage module according to claim 4, characterized in that, The first connecting portion (330) includes a plurality of connecting members connecting the first heat-conducting portion (310) and the second heat-conducting portion (320); wherein, One end of the connector is connected to the first heat-conducting part (310), and the other end of the connector is connected to the second heat-conducting part (320). The connector, the first heat-conducting part (310), and the second heat-conducting part (320) have an angle in the first direction, and two adjacent connectors are connected end to end. Alternatively, the plurality of connectors are divided into two groups, each group including a plurality of connectors arranged in parallel and spaced apart, with at least some of the connectors in different groups being arranged crosswise; Alternatively, the plurality of connectors may include a first connector and a second connector, wherein the second connector comprises at least two connectors, one end of the first connector is connected to the first heat-conducting part (310), the other end of the first connector is connected to one end of the second connector, and the other end of the second connector is connected to the second heat-conducting part (320).

6. The energy storage module according to claim 2, characterized in that, The heat-conducting component (300) further includes a heat pipe (341), one end of which is connected to the first heat-conducting part (310), and the other end of which is connected to the second heat-conducting part (320). The heat pipe (341) has the cavity, and a phase change medium is disposed in the cavity.

7. The energy storage module according to claim 6, characterized in that, The heat-conducting component (300) further includes a second connection portion (340), and the heat pipe (341) is installed in the second connection portion (340).

8. The energy storage module according to claim 2, characterized in that, The first heat-conducting part (310) includes a condenser (311), and the second heat-conducting part (320) includes an evaporator (321). One end of the condenser (311) exchanges heat with the evaporator (321), and the other end of the condenser (311) exchanges heat with the inner wall of the outer shell (100). The evaporator (321) exchanges heat with the battery cell unit (200). The phase change medium is provided in the cavity connecting the evaporator (321) and the condenser (311).

9. The energy storage module according to any one of claims 1-8, characterized in that, It also includes a conductive element (400) between the battery cell unit (200) and the heat-conducting assembly (300); and / or, the conductive element (400) between the heat-conducting assembly (300) and the inner wall of the outer casing (100); and / or, the conductive element (400) between the battery cell unit (200) and the bottom wall of the outer casing (100).

10. The energy storage module according to claim 1, characterized in that, The outer casing (100) also forms a second compartment (120) separated from the first compartment (110), and the energy storage module (1000) further includes: A radiator (500) is mounted on the outer casing (100) and extends into the second compartment (120); An electrical component (600) is installed in the second compartment (120) and is cooled by the heat sink (500). The electrical component (600) is electrically connected to the battery cell unit (200).

11. The energy storage module according to claim 10, characterized in that, The electrical component (600) includes a power device (610) and a circuit board (620). The heat sink (500) includes fins (510) and a substrate (520). The circuit board (620) is mounted on the inner wall of the first compartment (110). The substrate (520) is provided with a boss (521). The boss (521) exchanges heat with the power device (610). The fins (510) are used to exchange heat with the outside.

12. An energy storage system, characterized in that, include: At least one energy storage module (1000) as described in any one of claims 1-11.

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