Space ring assembly, battery, energy storage device and electric equipment

Abstract

The utility model discloses a space ring assembly, a battery, an energy storage device and electric equipment. The spacer assembly includes a metal spacer and an electrically insulating insulator. The spacer includes a bottom portion and a side portion. The side part extends from the periphery of the bottom part and forms an accommodating cavity together with the bottom part. And a first through hole communicated with the accommodating cavity is formed in the bottom. The insulating part is arranged on the space ring and located on the outer side wall of the space ring.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a spacer assembly, a battery, an energy storage device, and an electrical device. Background Art

[0002] Currently, batteries are widely used in fields such as mobile phones, computers, electric vehicles, and energy storage. Fast charging of batteries is an important technical direction. However, during fast charging, the current flowing through the battery cell is extremely large, and the heat generation power of the tab of the battery cell will increase significantly. At the same time, due to the small heat capacity of the tab of the battery cell, the temperature of the tab is significantly higher than the average temperature of the core during fast charging. As a result, the heat generated by the tab is transferred to the core in contact with it, exacerbating the non-uniformity of the battery temperature distribution, increasing the risk of lithium plating in the battery cell, and reducing the service life and safety of the battery.

[0003] Currently, one solution is to reduce the total resistance of the tab by increasing the thickness of the current collector to reduce the heat generation power of the tab during fast charging, thereby reducing the temperature of the battery during fast charging. However, increasing the thickness of the current collector will significantly reduce the energy density of the battery cell. Another solution is to use the roll welding method for the tab to reduce the tab resistance by welding more metal sheets only on the tab part, thereby reducing the heat generation power of the negative tab without reducing the energy density of the core. However, this solution requires changing the tab design, making the manufacturing process more complex and costly. Therefore, how to effectively dissipate heat from the tab without increasing the thickness of the current collector and changing the tab design and without affecting the energy density of the battery cell has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] The present application provides a spacer assembly, a battery, an energy storage device, and an electrical device.

[0005] In a first aspect, the present application provides a spacer assembly. The spacer assembly includes a thermally conductive and electrically conductive spacer and an electrically insulating insulating member. The spacer includes a bottom and a side portion. The side portion extends from the periphery of the bottom and together with the bottom defines a receiving cavity. The bottom is provided with a first through hole communicating with the receiving cavity. The insulating member is disposed on the spacer and is located on the outer sidewall of the spacer.

[0006] In some embodiments, the outer sidewall of the spacer includes a bonding region for bonding with an external structure, and the insulating member is disposed on the outer sidewall of the spacer and covers the bonding region.

[0007] In some embodiments, the bonding region is annular, and the insulating member is an annular structure surrounding the side portion.

[0008] In some embodiments, one end of the side away from the bottom protrudes and extends away from the center of the accommodating cavity to form a convex edge. The convex edge includes a joint surface away from the side, and the insulating member is disposed on the convex edge and covers the joint surface.

[0009] In some embodiments, the insulating member is a monomeric structure mounted on the spacer ring; or, the insulating member is an insulating coating formed on the spacer ring; or, the insulating member is an insulating film covering the spacer ring.

[0010] In some embodiments, the thickness a of the insulating member ranges from [0.005 mm, 1.000 mm].

[0011] In some embodiments, the spacer ring is a metal spacer ring or the spacer ring is a non-metal spacer ring.

[0012] In some embodiments, the material of the spacer ring is aluminum alloy, stainless steel, copper or copper core alloy. The material of the insulating member is polypropylene, alumina, silica or cordierite.

[0013] In some embodiments, the first through hole extends along the length direction of the spacer ring, and a second through hole is provided at the bottom of the spacer ring;

[0014] The second through hole is located on both sides in the length direction of the spacer ring; and / or, the second through hole is located on both sides in the width direction of the spacer ring.

[0015] In some embodiments, the spacer ring includes a first sub-spacer ring and a second sub-spacer ring. The first sub-spacer ring includes a first sub-bottom and a first sub-side extending from the periphery of the first sub-bottom. The first sub-bottom and the first sub-side enclose a first sub-cavity with a first open side. One side edge of the first sub-bottom corresponding to the first open side is provided with a first notch. The second sub-spacer ring includes a second sub-bottom and a second sub-side extending from the periphery of the second sub-bottom. The second sub-bottom and the second sub-side enclose a second sub-cavity with a second open side. One side edge of the second sub-bottom corresponding to the second open side is provided with a second notch. The first sub-spacer ring and the second sub-spacer ring are connected to form the spacer ring. The first sub-bottom and the second sub-bottom together form the bottom, the first sub-side and the second sub-side together form the side, the first sub-cavity and the second sub-cavity together form the accommodating cavity, and the first notch and the second notch together form the first through hole.

[0016] In a second aspect, the present application provides a battery, including the spacer ring assembly according to any one of the above embodiments.

[0017] In some embodiments, the battery further includes a housing and an electrode core. The spacer assembly is disposed in the housing. The electrode core is disposed in the housing, and the electrode core includes a core and tabs disposed on the core, and the tabs extend into the accommodation cavity through the first through hole.

[0018] In some embodiments, the difference between the width b of the first through hole and the thickness c of the tab is greater than 0.5 mm.

[0019] In some embodiments, the tab includes a positive tab, the spacer is an aluminum alloy spacer, and the positive tab extends into the accommodation cavity through the first through hole of the aluminum alloy spacer; and / or, the tab includes a negative tab, the spacer is a copper spacer, and the negative tab extends into the accommodation cavity through the first through hole of the copper spacer.

[0020] In a third aspect, the present application provides an energy storage device. The energy storage device includes the battery according to any one of the above embodiments.

[0021] In some embodiments, the energy storage device includes at least one row or at least one column of the batteries, and each row or each column of the batteries includes two of the batteries. The energy storage device further includes a cooling plate, and the cooling plate is disposed between adjacent batteries and is in contact with the housing of the battery.

[0022] In a fourth aspect, the present application provides an electrical equipment. The electrical equipment includes the energy storage device according to any one of the above embodiments.

[0023] For a spacer assembly, a battery energy storage device and an electrical equipment provided by the present application, on the one hand, the conductive and heat-conductive spacer enables heat-dissipating elements to be cooled around the spacer (such as tabs) to extend into the accommodation cavity through the first through hole, and the heat on the tabs is dissipated outward through the spacer, thereby reducing the temperature of the tabs. That is, it is not necessary to increase the thickness of the current collector to reduce the total resistance of the tabs, and then reduce the battery temperature, nor is it necessary to change the tab design to reduce the resistance of the tabs, and then reduce the battery temperature. That is, the present application uses a conductive and heat-conductive spacer to dissipate heat from the tabs, achieving effective heat dissipation of the tabs without increasing the thickness of the current collector and changing the tab design, and without affecting the energy density of the electrode core. On the other hand, the insulating member located outside the accommodation cavity enables the spacer to be insulated from the external structure, so that while the spacer assembly can be in contact with the external structure and exchange heat to dissipate heat, the risk of electric leakage or short circuit with the external structure can be avoided. On the other hand, the accommodation cavity can not only provide space to accommodate the tabs, so that the tabs do not need to be bent, but also increase the space for storing heat, so that the heat does not accumulate on the tabs and can be quickly dissipated to the outside, further improving the heat dissipation effect of the tabs.

[0024] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be learned through the practice of the present application. Description of the Drawings

[0025] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic three-dimensional assembly view of a partial structure of a battery according to some embodiments of the present application;

[0027] Figure 2 is Figure 1 a schematic three-dimensional structure view of a spacer assembly of the battery in ;

[0028] Figure 3 is Figure 2 a top view of the spacer assembly in ;

[0029] Figure 4 is Figure 2 a top view of a partial structure of the spacer assembly in ;

[0030] Figure 5 is Figure 2 a top view of another partial structure of the spacer assembly in ;

[0031] Figure 6 is a schematic three-dimensional exploded view of a partial structure of a battery according to some embodiments of the present application;

[0032] Figure 7 is a schematic three-dimensional exploded view of an energy storage device according to some embodiments of the present application;

[0033] Figure 8 is a schematic structural view of an electrical equipment according to some embodiments of the present application.

[0034] Description of the Main Element Numbers:

[0035] Electrical equipment 10000, energy storage device 1000, battery 100; box body 300; box cover 301; box body 303; cooling plate 500;

[0036] Spacer assembly 10, spacer 11, bottom 111, first through hole 1111, second through hole 1113, side portion 113, outer side wall 1130, bonding area 1131, accommodation cavity 115, convex edge 117, first sub-spacer 118, first sub-bottom 1181, first notch 11811, first sub-side portion 1183, first sub-cavity 1185, first open side 11851, second sub-spacer 119, second sub-bottom 1191, second notch 11911, second sub-side portion 1193, second sub-cavity 1195, second open side 11951, insulating member 13, housing 30, battery cell 50, electrode core 51, electrode tab 53, positive electrode tab 531, top cover 70, insulating portion 90. Detailed implementation

[0037] In the description of the present application, some of the disclosed content has been correspondingly shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The content described by referring to the drawings below is exemplary and is only used to explain the present application and cannot be understood as a limitation of the present application.

[0038] In the description of the present application, many different contents or examples are disclosed to implement different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0040] In the description of the present application, it should be understood that the terms used to indicate the orientation or position relationship (such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc.) are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and facilitating the understanding of the corresponding embodiments, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to indicate the orientation or position relationship cannot be understood as a limitation of the present application.

[0041] In the description of the present application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0042] In the description of the present application, it should be noted that, unless otherwise clearly specified or limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0043] Please refer to Figure 1 、 Figure 2 and Figure 3 The present application provides a spacer assembly 10. The spacer assembly 10 includes a conductive and heat-conductive spacer 11 and an electrically insulating insulating member 13. The spacer 11 includes a bottom 111 and a side portion 113. The side portion 113 extends from the periphery of the bottom 111 and together with the bottom 111 defines a receiving cavity 115. The bottom 111 is provided with a first through hole 1111 communicating with the receiving cavity 115. The insulating member 13 is disposed on the spacer 11 and is located on the outer sidewall 1130 of the spacer 11.

[0044] Wherein, a rectangular coordinate system is established with the length, width and height of the spacer assembly 10 as the three axes. In the embodiment of the present application, the first direction X is the length direction of the spacer assembly 10, the second direction Y is the width direction of the spacer assembly 10, and the third direction Z is the height direction of the spacer assembly 10.

[0045] Specifically, the spacer assembly 10 is used to cool the components placed in the spacer assembly 10. For example, when the spacer assembly 10 is disposed on the battery 100, the tab 53 ( Figure 6As shown in the figure), it can extend into the accommodation cavity 115 through the first through hole 1111, and the spacer assembly 10 can cool the tab 53. The spacer 11 includes a bottom 111 and a side portion 113. In some embodiments, the bottom 111 and the side portion 113 are an integral structure, that is, the bottom 111 and the side portion 113 are a single integral structure, thereby enhancing the bonding strength between the bottom 111 and the side portion 113 and preventing the bottom 111 and the side portion 113 from separating during the operation of the spacer 11, thus ensuring the stability and reliability of the operation of the spacer 11. In other embodiments, the bottom 111 and the side portion 113 are a split structure, that is, the bottom 111 and the side portion 113 are two different structures. In one example, the bottom 111 and the side portion 113 can be combined together by a detachable connection method, and the detachable connection method includes but is not limited to snap connection or threaded connection, etc. In another example, the bottom 111 and the side portion 113 can be combined together by a non-detachable connection method, and the non-detachable connection method includes but is not limited to bonding or welding, etc. The material of the spacer 11 is not limited in this application. It can be a metal spacer 11 or a non-metal spacer 11. In one implementation, the spacer 11 is a metal spacer 11, and the metal materials include but are not limited to conductive metals such as aluminum, iron, copper, aluminum alloy or iron alloy. In another implementation, the spacer 11 is a non-metal spacer 11. In this implementation, the material of the spacer 11 is a non-metal material that is both conductive and heat-conductive, such as graphene. In a possible implementation, the materials of the bottom 111 and the side portion 113 can be the same. For example, both the bottom 111 and the side portion 113 are made of aluminum material. In another implementation, the materials of the bottom 111 and the side portion 113 can be different. For example, the bottom 111 is made of aluminum material, and the side portion 113 is made of iron material. The shape of the projection surface of the bottom 111 in the XY plane can be circular, elliptical, triangular, quadrilateral or other polygons, etc., which is not limited here. In this implementation, the shape of the projection surface of the bottom 111 is rectangular.

[0046] The accommodation cavity 115 formed by the bottom 111 and the side portion 113 can accommodate the component to be cooled (such as Figure 6 the tab 53 shown in the figure). On the one hand, the tab 53 extending into the accommodation cavity 115 can exchange heat with the gas in the accommodation cavity 115 to reduce the temperature of the tab 53. On the other hand, it can directly contact the bottom 111 or the side portion 113 to exchange heat to reduce the temperature of the tab 53. Since the insulating member 13 is provided on the outer side wall 1130 of the spacer 11, there will be no leakage phenomenon when the tab 53 directly contacts the bottom 111 and / or the side portion 113. In addition to the tab 53 extending into the accommodation cavity 115 through the first through hole 1111 for cooling, the gas generated inside the battery 100 can also enter the accommodation cavity 115 from the first through hole 1111 communicating with the accommodation cavity 115 and exchange heat with the gas in the accommodation cavity 115 to further reduce the temperature.

[0047] The insulating member 13 and the spacer 11 can be combined together by a detachable connection method, and the detachable connection method includes but is not limited to snap connection or threaded connection, etc. In another example, the insulating member 13 and the spacer 11 can be combined together by a non-detachable connection method, and the non-detachable connection method includes but is not limited to bonding or welding, etc. The insulating member 13 can be one or more.

[0048] In a traditional spacer assembly, the spacer assembly is usually made of polypropylene (PP) material. Although the spacer assembly made of PP material has an insulating effect by itself, the thermal conductivity of the PP material itself is not good enough. In a comparative experiment, the present application uses the same battery to install spacer assemblies of the same shape but different materials. The experimental results are shown in Table 1. For the battery 100 using the spacer assembly 10 of the present application, the maximum temperature of the battery cell 50 and the maximum temperature of the electrode core 51 are both lower than those of the battery using the spacer assembly made of PP material. Therefore, the spacer assembly 10 of the present application has a better cooling effect on the battery cell 50 and the electrode core 51 than the spacer assembly made of PP material.

[0049] Table 1

[0050]

[0051] On the one hand, the spacer 11 enables the heat-dissipating element to be cooled around the spacer 11 (such as the tab 53) to extend into the accommodating cavity 115 through the first through hole 1111. The heat on the tab 53 is dissipated outward through the spacer 11, thereby reducing the temperature of the tab 53. That is, it is neither necessary to increase the thickness of the current collector to reduce the total resistance of the tab 53 and then reduce the temperature of the battery 100, nor to change the design of the tab 53 to reduce the resistance of the tab 53 and then reduce the temperature of the battery 100. That is, the present application uses the conductive and heat-conductive spacer 11 to dissipate heat from the tab 53, achieving effective heat dissipation of the tab 53 without increasing the thickness of the current collector and changing the design of the tab 53, and without affecting the energy density of the battery cell 50. The insulating member 13 located outside the accommodating cavity 115 enables the spacer 11 to be insulated from the external structure (such as the housing 30), so that while the spacer 11 assembly can be in contact with the housing 30 and perform heat exchange to dissipate heat, the risk of electric leakage or short circuit with the external structure can be avoided. On the other hand, the accommodating cavity 115 can not only provide space to accommodate the tab 53, so that the tab 53 does not need to be bent, but also the accommodating cavity 115 can increase the space for storing heat, so that the heat does not accumulate on the tab 53 and can be quickly dissipated to the outside, further improving the heat dissipation effect of the tab 53.

[0052] Please refer to Figure 2, in some embodiments, the outer sidewall 1130 of the spacer 11 includes a bonding region 1131 for bonding with an external structure, and the insulating member 13 is disposed on the side portion 113 and covers the bonding region 1131.

[0053] Specifically, the outer sidewall 1130 of the spacer 11 includes the outer side of the side portion 113 and the outer side of the bottom portion 111. In this application, the outer side of the side portion 113 is used for illustration. The bonding region 1131 may be one or more. In this application, the bonding region 1131 is an annular region. The shape of the bonding region 1131 may be circular, elliptical, triangular, quadrilateral, or other polygonal rings, etc. The bonding region 1131 may be a region surrounding the outer side of the side portion 113, or a structure disposed on the outer side of the side portion 113. It should be noted that when the bonding region 1131 is a region surrounding the outer side of the side portion 113, to ensure the insulation effect, all regions where the side portion 113 contacts the housing 30 should be the bonding region 1131. When the bonding region 1131 is a structure disposed on the outer side of the side portion 113, the bonding region may not be all regions contacting the housing 30. For example, the bonding region 1131 may be a spiral protrusion surrounding the side portion 113. For another example, the bonding region 1131 may be multiple small protrusions on the outer side of the side portion 113. The protrusions can keep a certain interval between the outer side of the side portion 113 and the housing 30, and then by covering the protrusions with the insulating member 13, the insulation effect can be achieved.

[0054] The outer side of the side portion 113 includes a bonding region 1131 for bonding with the housing 30. The insulating member 13 is disposed on the side portion 113 and covers the bonding region 1131, which can ensure the heat dissipation performance of the metal spacer 11 while avoiding leakage of the spacer 11, so that the spacer 11 can directly contact the housing 30 through the bonding region 1131 for heat exchange, improving the cooling effect of the spacer 11. In addition, the insulating member 13 is disposed on the side portion 113 and covers the bonding region 1131, which can insulate the interior of the accommodation cavity 115 from the housing 30. Therefore, the tab 53 can directly contact the inner wall of the accommodation cavity 115, improving the cooling effect of the tab 53.

[0055] Please refer to Figure 2 , in some embodiments, the bonding region 1131 is annular, and the insulating member 13 is an annular structure surrounding the side portion 113.

[0056] Specifically, the insulating member 13 is an annular structure surrounding the side portion 113. When the bonding region 1131 is a region surrounding the outer side of the side portion 113, to ensure the insulation effect, the insulating member 13 surrounds and covers all regions where the side portion 113 contacts the housing 30. When the bonding region 1131 is a structure disposed on the outer side of the side portion 113, the bonding region 1131 is an annular protrusion, and the insulating member 13 is an annular structure covering the bonding region 1131.

[0057] When the spacer assembly 10 is combined with the housing 30, such as the housing 30, the insulating member 13 has an annular structure, which can more evenly distribute the stress applied by the housing 30 to the bonding area 1131, reduce the stress concentration at various positions of the bonding area 1131, and also enable the insulating member 13 to cover all positions of the side portion 113 to ensure the insulation effect.

[0058] Please refer to Figure 2 and Figure 3 As shown in, in some embodiments, one end of the side portion 113 far from the bottom portion 111 protrudes and extends away from the center of the accommodating cavity 115 to form a flange 117. The flange 117 includes a bonding surface away from the side portion 113, and the insulating member 13 is disposed on the flange 117 and covers the bonding surface.

[0059] Specifically, the flange 117 can be one or more. In this application, the flange 117 is one and is disposed at one end of the side portion 113 far from the bottom portion 111. In other embodiments of this application, the flange 117 can be disposed at one end of the side portion 113 close to the bottom portion 111. If there are multiple flanges 117, the flanges 117 can also be provided at both ends of the side portion 113. The insulating member 13 can be one or more. In this application, the insulating member 13 is one and is disposed at one end of the side portion 113 far from the bottom portion 111. In other embodiments of this application, the insulating member 13 can be disposed at one end of the side portion 113 close to the bottom portion 111. If there are multiple insulating members 13, the insulating members 13 can also be provided at both ends of the side portion 113. It can be understood that to ensure the insulation effect, the number of flanges 117 is the same as the number of insulating members 13. The bonding surface is the surface where the flange 117 contacts the housing 30. Therefore, covering the bonding surface with the insulating member 13 can achieve an insulating effect.

[0060] The flange 117 provides fixation and protection for the spacer 11, reducing damage to the spacer 11 caused by mechanical shock or wear. The flange 117 can serve as a support structure for the spacer 11, enhancing the mechanical stability and structural integrity of the spacer 11. At the same time, since the thermal expansion coefficients of different materials may be different, the flange 117 can create a certain gap between the spacer 11 and the housing 30. Therefore, the flange 117 can provide a certain space for the thermal expansion of the spacer 11, preventing the spacer 11 from being directly squeezed by the housing 30 due to expansion.

[0061] Please refer to Figure 2 As shown in, in some embodiments, the insulating member 13 is a monomeric structure mounted on the spacer 11.

[0062] Specifically, the insulating member 13 with a monomeric structure is conducive to replacement and removal. The insulating member 13 with a monomeric structure can be designed into different shapes and sizes to adapt to spacers 11 of different specifications. The monomeric structure may provide better mechanical stability and strength, helping to protect the insulating member 13 itself from physical damage.

[0063] Please refer to Figure 2 , in some embodiments, the insulating member 13 is an insulating coating formed on the spacer 11.

[0064] Specifically, the insulating coating can evenly cover the outside of the spacer 11, making the insulating performance consistent everywhere on the spacer 11. The adhesion between the insulating coating and the outside of the spacer 11 can be stronger, reducing the risk of the insulating coating peeling off due to vibration or impact. In addition, the coating process has low cost and is suitable for large-scale production.

[0065] Please refer to Figure 2 , in some embodiments, the insulating member 13 is an insulating film covering the spacer 11.

[0066] Specifically, the insulating film is simple to manufacture and easy to install. In use, insulating films of different thicknesses and materials can be selected according to needs to meet specific insulation requirements.

[0067] Please refer to Figure 2 and Figure 3 , in some embodiments, the value range of the thickness a of the insulating member 13 is [0.005 mm, 1.000 mm].

[0068] Specifically, the value of the thickness a of the insulating member 13 can be 0.005 mm, 0.015 mm, 0.023 mm, 0.045 mm, 0.049 mm, 0.105 mm, 0.205 mm, 0.305 mm, 0.705 mm, or 1.000 mm. If the thickness a of the insulating member 13 is less than 0.005 mm, the thickness of the insulating member 13 is too thin, and the insulating member 13 cannot achieve the insulating effect, resulting in the spacer 11 contacting the housing 30, and further possibly causing the spacer 11 to leak electricity. If the thickness a of the insulating member 13 is greater than 1.000 mm, the thickness of the insulating member 13 is too thick, reducing the size of the compression accommodation cavity 115, resulting in limited heat conduction effect of the spacer 11.

[0069] The value range of the thickness a of the insulating member 13 being [0.005 mm, 1.000 mm] can not only ensure the insulating effect of the insulating member 13, but also control the volume of the insulating member 13, reserve sufficient space for the accommodation cavity 115, and ensure the heat conduction effect of the spacer 11.

[0070] Please refer to Figure 2, in some embodiments, the material of the spacer 11 is aluminum alloy, stainless steel, copper or copper core alloy. The material of the insulating member 13 is polypropylene, alumina, silica or cordierite.

[0071] Specifically, the material of the spacer 11 can be one or more of aluminum alloy, stainless steel, copper or copper core alloy. The material of the insulating member 13 can be one or more of polypropylene, alumina, silica or cordierite, so as to ensure both the heat conduction performance of the spacer 11 and the insulation performance of the insulating member 13.

[0072] Please refer to Figure 2 and Figure 3 , in some embodiments, the first through hole 1111 extends along the length direction (the first direction X) of the spacer 11, and the bottom wall of the accommodating cavity 115 is provided with a second through hole 1113, and the second through hole 1113 is located on both sides in the length direction (the first direction X) of the spacer 11.

[0073] Specifically, the bottom wall is the surface of the bottom 111 provided on one side of the accommodating cavity 115. The first through hole 1111 can be one or more. In this application, the first through hole 1111 is one. The cross-sectional shape of the first through hole 1111 includes but is not limited to a regular circle, an ellipse or a polygon, etc. In this application, the first through hole 1111 is rectangular. The first through hole 1111 is located at the central position in the width direction of the bottom 111 of the spacer 11, and can allow the tab 53 to extend into the accommodating cavity 115 along the shortest path. The second through hole 1113 can be one or more. In this application, the second through hole 1113 is multiple. The cross-sectional shape of the second through hole 1113 includes but is not limited to a regular circle, an ellipse or a polygon, etc. In this application, the second through hole 1113 is rectangular. The shapes of the multiple second through holes 1113 can be the same or different. For example, in the embodiment of this application, the spacer 11 includes 12 second through holes 1113, and every six second through holes 1113 are in a group, and are distributed on both sides in the length direction of the spacer 11. The number of the second through holes 1113 on both sides in the length direction of the spacer 11 is the same. In other embodiments of this application, the number of the second through holes 1113 distributed on both sides in the length direction of the spacer 11 can be different.

[0074] When an abnormality occurs inside the battery 100 and gas is generated, the first through-hole 1111 and the second through-hole 1113 can also serve as exhaust channels to guide the gas to converge into the accommodating cavity 115 and then be discharged from the explosion-proof valve (not shown), preventing the battery 100 from expanding and exploding due to the generated gas. In addition, the electrolyte can pass through the first through-hole 1111 and the second through-hole 1113 to reach the electrode core 53, improving the wetting performance of the electrolyte on the battery cell 50. The first through-hole 1111 and the second through-hole 1113 can also reduce the weight and volume of the spacer 11. On the one hand, the weight of the spacer 11 can be reduced, and on the other hand, more space can be reserved for the electrolyte. While retaining the function of the spacer 11, the battery 100 can accommodate more electrolyte, enabling the electrolyte to fully wet the battery cell 50.

[0075] Please refer to Figure 2 and Figure 3 , in some embodiments, the second through-holes 1113 are located on both sides in the width direction of the spacer 11.

[0076] Specifically, the second through-holes 1113 are located on both sides in the width direction of the spacer 11, which helps the gas to enter the accommodating cavity 115 evenly, making the heat distribution on both sides of the spacer 11 more uniform, reducing the thermal stress caused by uneven heat distribution, preventing the battery 100 from expanding due to thermal stress, and improving the heat dissipation efficiency.

[0077] Please refer to Figure 3 , Figure 4 and Figure 5 , in some embodiments, the spacer 11 includes a first sub-spacer 118 and a second sub-spacer 119. The first sub-spacer 118 includes a first sub-bottom 1181 and a first sub-side 1183 extending from the periphery of the first sub-bottom 1181. The first sub-bottom 1181 and the first sub-side 1183 enclose a first sub-cavity 1185 having a first open side 11851. One side edge of the first sub-bottom 1181 corresponding to the first open side 11851 is provided with a first notch 11811. The second sub-spacer 119 includes a second sub-bottom 1191 and a second sub-side 1193 extending from the periphery of the second sub-bottom 1191. The second sub-bottom 1191 and the second sub-side 1193 enclose a second sub-cavity 1195 having a second open side 11951. One side edge of the second sub-bottom 1191 corresponding to the second open side 11951 is provided with a second notch 11911. The first sub-spacer 118 and the second sub-spacer 119 are connected to form the spacer 11. The first sub-bottom 1181 and the second sub-bottom 1191 together form the bottom 111, the first sub-side 1183 and the second sub-side 1193 together form the side 113, the first sub-cavity 1185 and the second sub-cavity 1195 together form the accommodating cavity 115, and the first notch 11811 and the second notch 11911 together form the first through-hole 1111.

[0078] Specifically, in one embodiment, the spacer ring 11 is a split structure, and the spacer ring 11 includes a first sub-spacer ring 118 and a second sub-spacer ring 119. The first sub-spacer ring 118 and the second sub-spacer ring 119 together form the spacer ring 11. The first sub-spacer ring 118 and the second sub-spacer ring 119 are combined together by a detachable connection method, and the detachable connection method includes but is not limited to snap connection or threaded connection, etc. In one embodiment, the first sub-spacer ring 118 is provided with a first fitting (not shown), and the second sub-spacer ring 119 is provided with a second fitting (not shown). The first fitting or the second fitting includes a connecting protrusion, and the second fitting or the first fitting includes a connecting groove. The connecting protrusion is inserted into the connecting groove to connect the first sub-spacer ring 118 and the second sub-spacer ring 119.

[0079] The first sub-bottom 1181 and the first sub-side 1183 are an integral structure, thereby improving the bonding strength between the first sub-bottom 1181 and the first sub-side 1183, preventing the separation of the first sub-bottom 1181 and the first sub-side 1183 during the operation of the first sub-spacer ring 118, and thus ensuring the stability and reliability of the operation of the first sub-spacer ring 118. In some other embodiments, the first sub-bottom 1181 and the first sub-side 1183 are split structures, that is, the first sub-bottom 1181 and the first sub-side 1183 are two different structures. In one example, the first sub-bottom 1181 and the first sub-side 1183 can be combined together by a detachable connection method, and the detachable connection method includes but is not limited to snap connection or threaded connection, etc. In another example, the first sub-bottom 1181 and the first sub-side 1183 can be combined together by a non-detachable connection method, and the non-detachable connection method includes but is not limited to bonding or welding, etc. The first sub-spacer ring 118 is a metal first sub-spacer ring 118, and the metal materials include but are not limited to aluminum, iron, copper, aluminum alloy or iron alloy, etc. In a possible embodiment, the materials of the first sub-bottom 1181 and the first sub-side 1183 can be the same. For example, both the first sub-bottom 1181 and the first sub-side 1183 are made of aluminum material. In another embodiment, the materials of the first sub-bottom 1181 and the first sub-side 1183 can be different. For example, the first sub-bottom 1181 is made of aluminum material, and the first sub-side 1183 is made of iron material. The shape of the projection surface of the first sub-bottom 1181 in the XY plane can be circular, elliptical, triangular, quadrilateral or other polygons, etc., which is not limited here. In this embodiment, the shape of the projection surface of the first sub-bottom 1181 is rectangular.

[0080] The second sub-bottom 1191 and the second sub-side 1193 are an integral structure, thereby enhancing the bonding strength between the second sub-bottom 1191 and the second sub-side 1193, preventing the separation of the second sub-bottom 1191 and the second sub-side 1193 during the operation of the second sub-separator ring 119, and thus ensuring the stability and reliability of the operation of the second sub-separator ring 119. In some other embodiments, the second sub-bottom 1191 and the second sub-side 1193 are a split structure, that is, the second sub-bottom 1191 and the second sub-side 1193 are two different structures. In one example, the second sub-bottom 1191 and the second sub-side 1193 can be combined together by a detachable connection method, and the detachable connection methods include but are not limited to snap connection or threaded connection, etc. In another example, the second sub-bottom 1191 and the second sub-side 1193 can be combined together by a non-detachable connection method, and the non-detachable connection methods include but are not limited to bonding or welding, etc. The second sub-separator ring 119 is a metal second sub-separator ring 119, and the metal materials include but are not limited to aluminum, iron, copper, aluminum alloy or ferroalloy, etc. In a possible implementation manner, the materials of the second sub-bottom 1191 and the second sub-side 1193 can be the same. For example, both the second sub-bottom 1191 and the second sub-side 1193 are made of aluminum material. In another implementation manner, the materials of the second sub-bottom 1191 and the second sub-side 1193 can be different. For example, the second sub-bottom 1191 is made of aluminum material, and the second sub-side 1193 is made of iron material. The shape of the projection surface of the second sub-bottom 1191 in the XY plane can be circular, elliptical, triangular, quadrilateral or other polygons, etc., which is not limited here. In this implementation manner, the shape of the projection surface of the second sub-bottom 1191 is rectangular.

[0081] The first open side 11851 is the side where the first sub-separator ring 118 and the second sub-separator ring 119 are joined together. The second open side 11951 is the side where the second sub-separator ring 119 and the first sub-separator ring 118 are joined together. That is, when the first sub-separator ring 118 and the second sub-separator ring 119 are connected to form the separator ring 11, the first open side 11851 and the second open side 11951 are closely attached to each other, so that the first sub-bottom 1181 and the second sub-bottom 1191 jointly form the bottom 111, and the first sub-side 1183 and the second sub-side 1193 jointly form the side 113.

[0082] Forming the separator ring 11 in the way that the first sub-separator ring 118 and the second sub-separator ring 119 are separately formed and then connected can reduce the difficulty of the manufacturing process and also make the separator ring 11 easy to disassemble and install.

[0083] Please refer to Figure 1 、 Figure 2 and Figure 6, this application provides a battery 100, including the spacer assembly 10 described in any of the above embodiments.

[0084] On the one hand, the spacer 11 of the battery 100 enables the heat-dissipating elements to be cooled around the spacer 11 (such as the tab 53) to extend into the accommodation cavity 115 through the first through hole 1111. The heat on the tab 53 is dissipated outward through the spacer 11, thereby reducing the temperature of the tab 53. It is neither necessary to increase the thickness of the current collector to reduce the total resistance of the tab 53 and then reduce the temperature of the battery 100, nor to change the design of the tab 53 to reduce the resistance of the tab 53 and then reduce the temperature of the battery 100. That is, this application uses the spacer 11 to dissipate heat from the tab 53, achieving effective heat dissipation of the tab 53 without increasing the thickness of the current collector and changing the design of the tab 53, and without affecting the energy density of the battery cell 50. The insulating member 13 located outside the accommodation cavity 115 enables the spacer 11 to be insulated from the external structure (such as the housing 30), so that while the spacer assembly can contact the housing 30 and exchange heat to dissipate heat, the risk of electric leakage or short circuit with the external structure can be avoided. On the other hand, the accommodation cavity 115 can not only provide a space to accommodate the tab 53, enabling the tab 53 not to be bent, but also increase the space for storing heat, preventing heat from accumulating on the tab 53 and enabling it to be dissipated to the outside as soon as possible, further improving the heat dissipation effect of the tab 53.

[0085] Please refer to Figure 1 , Figure 2 and Figure 6 , in some embodiments, the battery 100 further includes a housing 30 and a battery cell 50. The spacer assembly 10 is accommodated in the housing 30. The battery cell 50 is accommodated in the housing 30. The battery cell 50 includes a core 51 and tabs 53 provided on the core 51. The tabs 53 extend into the accommodation cavity 115 through the first through holes 1111.

[0086] Specifically, the housing 30 is used to accommodate the battery cell 50. The housing 30 is a hollow structure, and its interior includes a cavity for accommodating the battery cell 50 and the electrolyte. The shape of the housing 30 can be determined according to the shape of the battery cell 50, that is, the housing 30 can be in various shapes such as a cylinder, a cuboid, a polyhedron, or a cone. For example, if the battery cell 50 is a cylindrical structure, the corresponding housing 30 can be a cylindrical structure; if the battery cell 50 is a cuboid structure, the corresponding housing 30 can be a cuboid structure. The material of the housing 30 includes but is not limited to metals or non-metals. Among them, metals include aluminum, iron, steel, aluminum alloy, or ferroalloy, etc., and non-metals include but are not limited to plastics, etc. In this application, the cross-section of the housing 30 is square, which is convenient for integrating into the battery 100. The material of the housing 30 is aluminum alloy, which can make the battery 100 lighter and more convenient for transportation while ensuring stiffness.

[0087] The battery cell 50 is the core structure in the battery 100 that realizes the conversion between electrical energy and chemical energy through chemical reactions for charging and discharging. The electrode core 51 is generally made by winding electrode sheets around a mandrel. The electrode sheets mainly include a negative electrode sheet, a positive electrode sheet, and a separator. In a possible design, the negative electrode sheet, the separator, and the positive electrode sheet are stacked in sequence and adhered to the mandrel by means of adhesive or heat melting, etc., and then wound to form the electrode core 51. After the battery cell 50 is formed, there are gaps, and the electrolyte can enter the battery cell 50 through the gaps. The electrolyte is used to soak the battery cell 50 to ensure that ions can move freely during the charging and discharging process of the battery cell 50. The electrolyte includes but is not limited to electrolyte lithium salts, organic solvents, and additives, etc. The negative electrode sheet includes a negative electrode current collector (such as copper foil) and a negative electrode active material layer (such as carbon or silicon) coated on the surface of the negative electrode current collector. The positive electrode sheet includes a positive electrode current collector (such as aluminum foil) and a positive electrode active material layer (such as ternary materials, lithium iron phosphate, or lithium cobaltate) coated on the surface of the positive electrode current collector. The separator is located between the adjacent negative electrode sheet and positive electrode sheet and is used to separate the negative electrode sheet and the positive electrode sheet.

[0088] The tab 53 is a metal conductor that leads out the negative electrode sheet and the positive electrode sheet in the electrode core 51. The tab 53 has a smaller volume and a smaller heat capacity relative to the electrode core 51. Therefore, during the charging process of the battery 100 (especially during fast charging), when fast charging, the current flowing through the battery cell 50 is extremely large. According to Ohm's law, the heat generation power of the tab 53 will increase significantly. At the same time, because the heat capacity of the tab 53 part is small, it may cause the temperature of the tab 53 to be significantly higher than the average temperature of the electrode core 51 during fast charging.

[0089] Furthermore, the battery 100 further includes a top cover 70 and an insulating part 90. The insulating part 90 includes a first surface and a second surface facing away from each other. The second surface of the insulating part 90 is connected to the side part 113 of the spacer 11, and the first surface of the insulating part 90 is connected to the top cover 70. The housing 30 is provided with an opening, and the insulating part 90 covers the opening.

[0090] Therefore, the tab 53 extends into the accommodation cavity 115 through the first through hole 1111. The accommodation cavity 115 dissipates heat to the external environment, which can reduce the temperature of the tab 53 placed inside the accommodation cavity 115. The tab 53 can reduce the temperature without increasing its own thickness, enabling the tab 53 to maintain the existing energy density while also reducing the temperature. At the same time, the spacer 11 cools the tab 53, which can also make the temperatures of the tab 53 and the electrode core 51 close, improving the uniformity of the internal temperature of the battery 100. Meanwhile, the insulating member 13 located outside the accommodation cavity 115 can insulate the spacer 11 from the structure outside the spacer 11, so that the tab 53 can contact the inner wall of the accommodation cavity 115. While the spacer assembly 10 can contact the housing 30 and exchange heat to dissipate heat, it can avoid the risk of electric leakage or short circuit with the external structure. The accommodation cavity 115 can not only provide space to accommodate the tab 53, enabling the tab 53 not to be bent, but also increase the heat capacity and absorb more heat.

[0091] Please refer to Figure 3 and Figure 6 , in some embodiments, the difference between the width b of the first through hole 1111 and the thickness c of the tab 53 is greater than 0.5 mm.

[0092] Specifically, the difference between the width b of the first through hole 1111 and the thickness c of the tab 53 can be 0.51 mm, 0.52 mm, 0.58 mm, 0.62 mm, 0.66 mm, 0.68 mm, 0.70 mm, 0.72 mm, 0.76 mm, or 0.98 mm. After the tab 53 passes through the first through hole 1111, it will occupy a part of the area of the first through hole 1111. If the difference between the width b of the first through hole 1111 and the thickness c of the tab 53 is less than 0.5 mm, the remaining area of the first through hole 1111 after being occupied by the tab 53 is too small. When the internal pressure of the battery 100 increases, the too small area of the first through hole 1111 will limit the speed of gas entering the accommodation cavity 115, that is, it will affect the exhaust inside the battery 100. In addition, the tab 53 may expand during the charge and discharge process. If the difference between the width b of the first through hole 1111 and the thickness c of the tab 53 is less than 0.5 mm, the tab 53 may block the first through hole 1111 after expansion, and then block the channel for gas to enter the accommodation cavity 115 and dissipate heat.

[0093] The difference between the width b of the first through hole 1111 and the thickness c of the tab 53 being greater than 0.5 mm can reserve space for the tab 53 to expand, avoid blocking of the first through hole 1111, and ensure that gas can enter the accommodation cavity 115 from the first through hole 1111 for heat dissipation.

[0094] Please refer to Figure 3 and Figure 6, in some embodiments, the tab 53 includes a positive tab 531, the spacer 11 is an aluminum alloy spacer 11, and the positive tab 53 extends into the accommodation cavity 115 through the first through hole 1111 of the aluminum alloy spacer 11.

[0095] Specifically, the aluminum alloy has a lower density, which can reduce the weight of the spacer 11, thereby reducing the overall weight of the battery 100 and improving the energy density. The aluminum alloy spacer 11 has good thermal conductivity, which helps to quickly transfer the heat generated by the positive tab 531 to the outside and improve the heat dissipation efficiency. At the same time, the aluminum alloy spacer 11 has a lower cost, which helps to reduce the production cost of the battery 100.

[0096] Furthermore, in an embodiment of the present application, the positive electrode plate includes a positive current collector made of aluminum foil material (such as aluminum foil) and a positive active material layer coated on the surface of the positive current collector. It can be seen that both the positive electrode plate and the spacer 11 are made of aluminum alloy. The positive electrode plate and the spacer 11 made of the same material are more consistent in conductivity, which helps to reduce the power loss caused by resistance mismatch. At the same time, the electrical properties of the same material are consistent, which helps to improve the stability of the battery.

[0097] Please refer to Figure 3 and Figure 6 , in some embodiments, the tab 53 includes a negative tab (not shown), the spacer 11 is a copper spacer 11, and the negative tab extends into the accommodation cavity 115 through the first through hole 1111 of the copper spacer 11.

[0098] Copper has better antioxidant properties than other metals, which helps the copper spacer 11 to maintain stability during the charge and discharge process of the battery 100. The copper spacer 11 also has better mechanical strength, which can avoid mechanical damage to the battery 100 during use.

[0099] Furthermore, in an embodiment of the present application, the negative electrode plate includes a negative current collector (such as copper foil) and a negative active material layer coated on the surface of the negative current collector. It can be seen that both the negative electrode plate and the spacer 11 are made of aluminum alloy. The positive electrode plate and the spacer 11 made of the same material are more consistent in conductivity, which helps to reduce the power loss caused by resistance mismatch. At the same time, the electrical properties of the same material are consistent, which helps to improve the stability of the battery.

[0100] Please refer to Figure 2 , Figure 3 and Figure 7 , the present application provides an energy storage device 1000. The energy storage device 1000 includes the battery 100 described in any one of the above embodiments.

[0101] Specifically, the energy storage device 1000 of the present application refers to a device that can convert the chemical energy stored therein into electrical energy, that is, a device that converts the pre-stored energy into electrical energy available for external use. The energy storage device 1000 can be charged and store electrical energy, and can also be discharged to supply power to other external devices. It can be understood that the energy storage device 1000 can include, but is not limited to, a battery pack, a battery module, or a battery system, etc.

[0102] In some embodiments of the present application, the energy storage device 1000 includes a plurality of batteries 100 and a box body 300. The box body 300 is a structure for placing the batteries 100. The cross-section of the box body 300 (the plane intercepted by the XY plane) can be, but is not limited to, circular, elliptical, square, or other polygons. The box body 300 is used to provide a containing space for the batteries 100, and the box body 300 can adopt various structures. In some embodiments, the box body 300 can include a box cover 301 and a box body 303. The box cover 301 and the box body 303 cover each other, and the box cover 301 and the box body 303 jointly define a containing space for accommodating the batteries 100. The box body 303 can be a hollow structure with one end open, and the box cover 301 can be a plate-like structure. The box cover 301 covers the open side of the box body 303 so that the box cover 301 and the box body 303 jointly define a containing space; the box cover 301 and the box body 303 can also both be hollow structures with one side open, and the open side of the box cover 301 covers the open side of the box body 303. Of course, the box body 300 formed by the box cover 301 and the box body 303 can be of various shapes, for example, a cylinder or a cuboid, etc. The energy storage device 1000 can also include other structures. For example, the energy storage device 1000 can also include a busbar component for realizing electrical connection between the plurality of batteries 100. In one example, the box cover 301 and the box body 303 can be combined together by a detachable connection method, and the detachable connection method includes, but is not limited to, snap connection or screw connection, etc. In another example, the box cover 301 and the box body 303 can be combined together by a non-detachable connection method, and the non-detachable connection method includes, but is not limited to, bonding or welding, etc.

[0103] The material of the housing 300 includes, but is not limited to, metal or non-metal. Among them, metals include aluminum, iron, steel, aluminum alloy, iron alloy, etc., and non-metals include, but are not limited to, plastics, etc. In this application, the cross-section of the housing 300 is square, so that it can be conveniently integrated into the energy storage device 1000. The material of the housing 300 is aluminum alloy, so that on the premise of ensuring strength, the energy storage device 1000 can be made lighter and more convenient for transportation. In addition, when the housing 300 includes a housing body 303 and a housing cover 301, the housing 300 may not be made of only one material. For example, the housing body 303 and the housing cover 301 are made of the same material, both of which are aluminum alloy. The housing 300 can also be made of different materials for different components. For example, the housing body 303 is made of metal material, while the housing cover 301 is made of plastic. Of course, the materials of the housing body 303 and the housing cover 301 can also be combined in other different ways, which will not be listed one by one here.

[0104] On the one hand, the spacer 11 of the battery 100 enables the heat-dissipating elements to be cooled around the spacer 11 (such as the tab 53) to extend into the accommodating cavity 115 through the first through hole 1111. The heat on the tab 53 is dissipated outward through the spacer 11, thereby reducing the temperature of the tab 53. That is, it is not necessary to increase the thickness of the current collector to reduce the total resistance of the tab 53 and then reduce the temperature of the battery 100, nor is it necessary to change the design of the tab 53 to reduce the resistance of the tab 53 and then reduce the temperature of the battery 100. That is, in this application, the conductive and heat-conductive spacer 11 is used to dissipate heat from the tab 53, achieving effective heat dissipation of the tab 53 without increasing the thickness of the current collector and changing the design of the tab 53, and without affecting the energy density of the battery cell 50. The insulating member 13 located outside the accommodating cavity 115 enables the spacer 11 to be insulated from the external structure (such as the housing 30), so that while the spacer 11 assembly can contact the housing 30 and exchange heat to dissipate heat, the risk of electric leakage or short circuit with the external structure can be avoided. On the other hand, the accommodating cavity 115 can not only provide a space to accommodate the tab 53, so that the tab 53 does not need to be bent, but also the accommodating cavity 115 can increase the space for storing heat, so that the heat does not accumulate on the tab 53 and can be quickly dissipated to the outside, further improving the heat dissipation effect of the tab 53.

[0105] Please refer to Figure 2 、 Figure 3 and Figure 7 , in some embodiments, the energy storage device 1000 includes at least one row of batteries 100 or at least one column of batteries 100, and each row or each column of batteries 100 contains two batteries 100. The energy storage device 1000 further includes a cooling plate 500, and the cooling plate 500 is disposed between adjacent batteries 100 and contacts the housing 30 of the battery 100.

[0106] Specifically, the energy storage device 1000 is an aggregate composed of multiple energy storage batteries 100, and the battery 100 is the smallest unit for storing and releasing electric energy. The energy storage device 1000 composed of the batteries 100 can store and release energy by connecting and controlling the batteries 100. In the energy storage device 1000, there are multiple batteries 100, and the multiple batteries 100 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple batteries 100. The multiple batteries 100 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple batteries 100 is accommodated in a carrier (such as the box body 300 of the energy storage device 1000). More specifically, the energy storage device 1000 includes at least one row of batteries 100 or at least one column of batteries 100, and each row or column of batteries 100 contains two batteries 100. One row of batteries 100 is arranged in sequence along the first direction X, and one column of batteries 100 is arranged in sequence along the second direction Y. A cooling plate 500 is provided between adjacent batteries 100. The cooling plate 500 is used to contact the housing 30 of the battery 100 and perform heat exchange, so that after the heat generated by the tab 53 diffuses to the housing 30 through the spacer 11, the heat can be exchanged by the contact between the housing 30 and the cooling plate 500, so as to take away the heat of the housing 30 of the battery 100, thereby improving the heat exchange efficiency of the spacer 11 in the battery 100. The cooling plate 500 can be a liquid cooling plate with water as the heat dissipation medium, an air cooling plate with gas as the heat dissipation medium, or other forms of cooling plates. The energy storage device 1000 may further include other structures. For example, the energy storage device 1000 may further include a busbar component (not shown in the figure) for realizing the electrical connection between the multiple batteries 100. It can be understood that the number of batteries 100 in the energy storage device 1000 can be adaptively adjusted according to the application scenario and capacity of the energy storage device 1000.

[0107] Please refer to Figure 2 、 Figure 3 and Figure 8 In the fourth aspect, the present application provides an electrical device 10000, and the electrical device 10000 includes the energy storage device 1000 of any one of the above embodiments.

[0108] The battery 100 or energy storage device 1000 disclosed in the present application can be used in an electrical device 10000 that uses the energy storage device 1000 as a power source. The electrical device 10000 can be, but is not limited to, an electric vehicle, an electric tool, a mobile phone, a ship, a spacecraft, etc. Among them, the spacecraft can include an unmanned aerial vehicle, a rocket, a space shuttle, etc. The present application will only take the electrical device 10000 as a vehicle as an example for illustration. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc. The energy storage device 1000 is disposed inside the vehicle, and the energy storage device 1000 can be disposed at the bottom, head or tail of the vehicle. The energy storage device 1000 can be used for power supply of the vehicle. For example, the energy storage device 1000 can be used as an operating power source of the vehicle. The vehicle can also include a controller and a motor. The controller is used to control the energy storage device 1000 to supply power to the motor. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle. In some embodiments, the energy storage device 1000 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0109] On the one hand, the spacer 11 of the battery 100 of the energy storage device 1000 of the electrical device 10000 enables the heat dissipation element to be cooled around the spacer 11 (such as the tab 53) to extend into the accommodation cavity 115 through the first through hole 1111. The heat on the tab 53 is dissipated outward through the spacer 11, thereby reducing the temperature of the tab 53. That is, there is no need to increase the thickness of the current collector to reduce the total resistance of the tab 53, and then reduce the temperature of the battery 100, nor is it necessary to change the design of the tab 53 to reduce the resistance of the tab 53, and then reduce the temperature of the battery 100. That is, the present application uses the conductive and heat-conductive spacer 11 to dissipate heat from the tab 53, achieving effective heat dissipation of the tab 53 without increasing the thickness of the current collector and changing the design of the tab 53, and without affecting the energy density of the battery cell 50. The insulating member 13 located outside the accommodation cavity 115 enables the spacer 11 to be insulated from the external structure (such as the housing 30), so that while the spacer 11 assembly can contact the housing 30 and exchange heat to dissipate heat, the risk of electric leakage or short circuit with the external structure can be avoided. On the other hand, the accommodation cavity 115 can not only provide a space to accommodate the tab 53, so that the tab 53 does not need to be bent, but also the accommodation cavity 115 can increase the space for storing heat, so that the heat does not accumulate on the tab 53 and can be quickly dissipated to the outside, further improving the heat dissipation effect of the tab 53.

[0110] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to the embodiments of the present application without departing from the principle and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A spacer assembly (10), characterized in that: include: A heat-conducting and electrically-conducting spacer (11), the spacer (11) comprising a bottom (111) and a side portion (113), the side portion (113) extending from the periphery of the bottom (111) and together with the bottom (111) forming a receiving cavity (115), the bottom (111) being provided with a first through hole (1111) communicating with the receiving cavity (115); and An electrically insulating insulating member (13) is provided on the spacer (11) and is located on an outer side wall (1130) of the spacer (11).

2. The spacer assembly (10) according to claim 1, characterized in that: The outer side wall (1130) of the spacer (11) comprises a bonding area (1131) that is bonded to an external structure, and the insulating member (13) is arranged on the outer side wall (1130) of the spacer (11) and covers the bonding area (1131).

3. The spacer assembly (10) according to claim 2, characterized in that: The bonding area (1131) is annular, and the insulating member (13) is an annular structure surrounding the side portion (113).

4. The spacer assembly (10) according to claim 1, characterized in that: An end of the side portion (113) away from the bottom portion (111) is provided with a convex edge (117) protruding toward the center away from the accommodating cavity (115), and the convex edge (117) includes a joint surface away from the side portion (113), and the insulating member (13) is arranged on the convex edge (117) and covers the joint surface.

5. The spacer assembly (10) according to claim 1, characterized in that: The insulating member (13) is a single body structure mounted on the spacer (11); or, The insulating member (13) is an insulating coating formed on the spacer (11); or, The insulating member (13) is an insulating film covering the spacer (11).

6. The spacer assembly (10) according to claim 1, characterized in that: The value range of the thickness a of the insulating member (13) is [0.005 mm, 1.000 mm].

7. The spacer assembly (10) according to claim 1, characterized in that: The spacer (11) is a metal spacer; or The spacer (11) is a non-metallic spacer.

8. The spacer assembly (10) according to claim 1, characterized in that: The material of the spacer (11) is aluminum alloy, stainless steel, copper or copper core alloy; and / or, The material of the insulating member (13) is polypropylene, alumina, silicon dioxide or cordierite.

9. The spacer assembly (10) according to claim 1, characterized in that: The first through hole (1111) extends along the length direction of the spacer (11), and the bottom (111) of the spacer (11) is provided with a second through hole (1113); The second through holes (1113) are located on both sides of the spacer (11) in the length direction; and / or, The second through holes (1113) are located on both sides of the spacer (11) in the width direction.

10. The spacer assembly (10) according to claim 1, characterized in that: The spacer (11) comprises: a first sub-spacer (118), the first sub-spacer (118) comprising a first sub-bottom (1181) and a first sub-side portion (1183) extending from the periphery of the first sub-bottom (1181), the first sub-bottom (1181) and the first sub-side portion (1183) enclosing a first sub-cavity (1185) having a first open side (11851), and a first notch (11811) being provided on one side edge of the first sub-bottom (1181) corresponding to the first open side (11851); and A second sub-spacer (119), wherein the second sub-spacer (119) comprises a second sub-bottom (1191) and a second sub-side portion (1193) extending from the periphery of the second sub-bottom (1191), the second sub-bottom (1191) and the second sub-side portion (1193) enclose a second sub-cavity (1195) having a second open side (11951), and a second notch (11911) is provided on one side edge of the second sub-bottom (1191) corresponding to the second open side (11951); The first sub-spacer (118) and the second sub-spacer (119) are connected to form the spacer (11); the first sub-bottom (1181) and the second sub-bottom (1191) together form the bottom (111); the first sub-side portion (1183) and the second sub-side portion (1193) together form the side portion (113); the first sub-cavity (1185) and the second sub-cavity (1195) together form the accommodating cavity (115); and the first notch (11811) and the second notch (11911) together form the first through hole (1111).

11. A battery (100), characterized in that: include: The spacer assembly (10) according to any one of claims 1 to 10.

12. The battery (100) according to claim 11, characterized in that: The battery (100) further comprises: a housing (30), wherein the spacer assembly (10) is accommodated in the housing (30); and A battery cell (50), the battery cell (50) being accommodated in the shell (30), the battery cell (50) comprising a pole core (51) and a pole ear (53) arranged on the pole core (51), the pole ear (53) passing through the first through hole (1111) and extending into the accommodating cavity (115).

13. The battery (100) according to claim 12, characterized in that: The difference between the width b of the first through hole (1111) and the thickness c of the tab (53) is greater than 0.5 mm.

14. The battery (100) according to claim 12, characterized in that: The electrode tab (53) comprises a positive electrode tab, the spacer (11) is an aluminum alloy spacer (11), and the positive electrode tab passes through a first through hole (1111) of the aluminum alloy spacer (11) and extends into the accommodating cavity (115); and / or, The electrode tab (53) comprises a negative electrode tab, the spacer (11) is a copper spacer (11), and the negative electrode tab passes through a first through hole (1111) of the copper spacer (11) and extends into the accommodating cavity (115).

15. An energy storage device (1000), characterized in that: include: A battery (100) according to any one of claims 11 to 14.

16. The energy storage device (1000) according to claim 15, characterized in that: The energy storage device (1000) comprises at least one row of batteries (100) or at least one column of batteries (100), each row of batteries (100) or each column of batteries (100) comprising two batteries (100), and the energy storage device (1000) further comprises a cooling plate (500), wherein the cooling plate (500) is arranged between adjacent batteries (100) and is in contact with a housing (30) of the battery (100).

17. An electrical device (10000), characterized in that: Comprising the energy storage device (1000) as claimed in claim 15 or 16.

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