Energy storage device and electric device

Abstract

The utility model provides a kind of energy storage device and electric equipment, wherein energy storage device includes: multiple electric core;Base has locating structure to locate installation electric core;Heat conduction piece has first heat transfer surface and second heat transfer surface;Wherein, at least part of first heat transfer surface is arranged around electric core, and second heat transfer surface is in contact with base;The side of base away from heat conduction piece is equipped with multiple radiating fins.The base of the application can be used to locate installation electric core, and is provided with radiating fin simultaneously, can increase the contact area with air, so that air can flow quickly on the surface of radiating fin, improve heat dissipation efficiency;And by first heat transfer surface around electric core setting, can increase the heat transfer area of heat conduction piece and electric core, to improve the heat transfer efficiency of electric core and base;At the same time, compared with the scheme of liquid cooling heat exchange, the space and weight required by the energy storage device of the application are smaller, can be better applied to the application scene of space and weight limitation.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to an energy storage device and electrical equipment. Background Technology

[0002] Currently, energy storage devices employ thermal management structures to regulate the temperature of the battery cells. In related technologies, thermal management structures primarily rely on liquid heat exchange schemes; however, current thermal management structures limit the applicability of energy storage devices in space- and weight-constrained applications. Utility Model Content

[0003] The present invention provides an energy storage device and an electrical appliance to at least partially solve the above-mentioned technical problems.

[0004] In a first aspect, embodiments of the present invention provide an energy storage device, comprising:

[0005] Multiple battery cells;

[0006] The base has a positioning structure for positioning and mounting the battery cell;

[0007] A heat-conducting component having a first heat transfer surface and a second heat transfer surface;

[0008] In this configuration, at least a portion of the first heat transfer surface is arranged around the battery cell, and the second heat transfer surface is in contact with the base; the base has a plurality of heat sinks on the side away from the heat conductor.

[0009] By adopting the above solution, the base of this application can not only be used to position and install the battery cell, but also has heat sinks, which can increase the contact area with air, allowing air to flow rapidly on the surface of the heat sink and improving heat dissipation efficiency. Furthermore, by setting the first heat transfer surface around the battery cell, the heat transfer area between the heat conductor and the battery cell can be increased, thereby improving the heat transfer efficiency between the battery cell and the base, and effectively addressing the temperature rise problem caused by high-rate discharge. At the same time, compared with liquid cooling heat exchange solutions, the energy storage device of this application requires less space and weight, and can be better suited for application scenarios with limited space and weight.

[0010] Optionally, in some embodiments of this application, the first heat transfer surface is arranged perpendicular to the second heat transfer surface.

[0011] By adopting the above scheme, the first heat transfer surface can be arranged around the battery cell, while the second heat transfer surface can extend along the side surface of the base near the heat conductor, ensuring the heat transfer area between the second heat transfer surface and the base.

[0012] Optionally, in some embodiments of this application, the heat-conducting element is configured to have a first adapter hole to receive at least a portion of the battery cell, wherein at least a portion of the hole wall of the first adapter hole is formed by the first heat-transfer surface.

[0013] By adopting the above scheme, by making the first heat transfer surface form the first adapter hole, not only can the area of ​​the first heat transfer surface be increased, but also the high-temperature material generated by the thermal runaway of the battery cell can be prevented from flowing along the outer surface of the battery cell to the other end through the close contact between the first heat transfer surface and the battery cell.

[0014] Optionally, in some embodiments of this application, the ratio of the height of the battery cell to the height of the first heat transfer surface in the axial direction of the battery cell ranges from 8 to 12.

[0015] Using the above scheme, given a fixed cell diameter, the height of the first heat transfer surface determines the heat transfer area between the heat conductor and the cell. Therefore, the greater the height of the first heat transfer surface, the higher the heat transfer efficiency between the heat conductor and the cell. However, considering that in the event of thermal runaway of the cell, the generated heat will also be transferred to adjacent cells through the heat conductor, affecting the temperature of adjacent cells, the following approach is adopted: By limiting the ratio of the cell height to the height of the first heat transfer surface, the heat transfer efficiency between the heat conductor and the cell can be guaranteed while reducing heat transfer between adjacent cells, thus improving the safety of the energy storage device.

[0016] Optionally, in some embodiments of this application, the positioning structure includes:

[0017] A positioning groove, in which at least a portion of the battery cell is disposed;

[0018] The base has:

[0019] A pressure relief channel is provided, corresponding to the pressure relief structure of the battery cell;

[0020] The pressure relief channel is connected to the positioning groove.

[0021] By adopting the above solution and setting up a pressure relief channel, the high-temperature substances generated by the thermal runaway of the battery cell can be effectively released.

[0022] Optionally, in some embodiments of this application, the energy storage device further includes:

[0023] An isolation element is located, at least partially, between the pressure relief channel and the battery cell;

[0024] The insulating component includes at least one of a heat insulation layer and a fire-resistant layer;

[0025] The base is formed with:

[0026] The first boss, at least a portion of the spacer overlaps the first boss.

[0027] Using the above scheme, when a battery cell experiences thermal runaway, the pressure of the released high-temperature material can break through the insulating component at the bottom of the runaway cell and be released into the pressure relief channel, then diffuse along the space at the bottom of the base to adjacent pressure relief channels. During this diffusion process, the pressure of the high-temperature material decreases, becoming insufficient to break through the insulating components at the bottom of adjacent cells. This prevents the high-temperature material and flame from contacting adjacent cells and triggering thermal runaway, avoiding cascading runaway caused by thermal diffusion between cells, and improving the safety performance of the energy storage device. A first protrusion is provided to limit the movement of the insulating component.

[0028] Optionally, in some embodiments of this application, the energy storage device further includes:

[0029] An insulating component is disposed between the conductive structure of the battery cell and the base;

[0030] The base is formed with:

[0031] The second boss, at least a portion of the insulating member is sandwiched between the second boss and the battery cell.

[0032] By adopting the above solution and installing insulating components, direct contact between the conductive structure of the battery cell and the base can be avoided, thus achieving insulation protection for the conductive structure of the battery cell. Furthermore, the second protrusion provides a limiting position for the insulating components.

[0033] Optionally, in some embodiments of this application, the energy storage device further includes:

[0034] The heat insulation component has multiple through-hole second adapter holes;

[0035] The heat insulation component is located on the side of the heat-conducting component away from the base, and at least a portion of the battery cell is disposed within the second adapter hole.

[0036] By adopting the above solution and installing thermal insulation components, the thermal runaway battery cell can be thermally isolated, reducing the diffusion of heat to adjacent battery cells.

[0037] Optionally, in some embodiments of this application, the energy storage device further includes:

[0038] A limiting member is disposed on the side of the heat insulation member away from the base to limit the battery cell between the limiting member and the base;

[0039] Connectors are respectively inserted into the heat insulation component and the heat conduction component;

[0040] One end of the connector is fixedly connected to the limiting member, and the other end is fixedly connected to the base.

[0041] By adopting the above scheme, the limiting components, heat insulation components, heat conduction components, multiple battery cells and base are fixed as a whole through the setting of limiting components and connecting components, thereby improving the structural stability and reliability of the energy storage device.

[0042] Secondly, embodiments of this utility model provide an electrical device, including the energy storage device described above. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a perspective view of the energy storage device provided in an embodiment of the present invention;

[0045] Figure 2 This is a cross-sectional view of the energy storage device provided in an embodiment of this utility model;

[0046] Figure 3 This is a cross-sectional view of the heat-conducting component in the energy storage device provided in an embodiment of this utility model;

[0047] Figure 4 yes Figure 2 Enlarged view of section A;

[0048] Figure 5 yes Figure 2 Enlarged view of section B;

[0049] Figure 6 This is a perspective view of the base in the energy storage device provided in an embodiment of this utility model;

[0050] Figure 7 yes Figure 6 Enlarged view of section C;

[0051] Figure 8 This is a perspective view of the energy storage device provided in an embodiment of the present invention, showing the isolation.

[0052] Figure 9 This is a perspective view of the insulating component in the energy storage device provided in an embodiment of this utility model.

[0053] Explanation of reference numerals in the attached figures:

[0054] 100. Energy storage devices;

[0055] 110. Battery cells;

[0056] 120, Base; M1, Positioning structure; 120a, Positioning groove; 120b, Pressure relief channel; 121, Heat sink; 122, First boss; 123, Second boss;

[0057] 130, heat-conducting component; 130a, first adapter hole;

[0058] 131. First heat transfer surface; 132. Second heat transfer surface; 133. Contact part; 134. Third heat transfer surface; 135. Fourth heat transfer surface;

[0059] 140. Insulating element; 141. Thermal insulation layer; 142. Fire-resistant layer;

[0060] 150. Insulating element; 151. First insulating part; 151a. Clearance hole; 152. Second insulating part; 152a. Notch;

[0061] 160, Thermal insulation; 160a, Second adapter hole;

[0062] 171. Limiting component; 172. Connecting component; 173. First fastener; 174. Second fastener;

[0063] 181. Busbar; 182. Cover plate;

[0064] C1, central axis. Detailed Implementation

[0065] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model.

[0066] In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operating state, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative purposes and do not impose numerical requirements or establish a numerical order.

[0067] In this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural.

[0068] Firstly, referring to Figures 1 to 3 This application provides an energy storage device 100, including: a battery cell 110, a base 120 and a heat-conducting component 130.

[0069] In this embodiment of the application, multiple battery cells 110 are provided, and the base 120 has a positioning structure M1 to position and install the battery cells 110, thereby holding multiple battery cells 110 in a preset installation position on the base 120, so that there is a suitable distance between adjacent battery cells 110.

[0070] The heat-conducting component 130 in this embodiment has a first heat transfer surface 131 and a second heat transfer surface 132. At least a portion of the first heat transfer surface 131 is arranged around the battery cell 110, and the second heat transfer surface 132 is in contact with the base 120. The base 120 is provided with a plurality of heat sinks 121 on the side away from the heat-conducting component 130.

[0071] It can be understood that the first heat transfer surface 131 is the surface on the heat-conducting component 130 that transfers heat with the battery cell 110, and the second heat transfer surface 132 is the surface on the heat-conducting component 130 that transfers heat with the base 120. The first heat transfer surface 131 can be continuously arranged around the central axis C1 of the battery cell 110, or the first heat transfer surface 131 includes multiple heat transfer units arranged at intervals, and the whole composed of the multiple heat transfer units is arranged around the central axis C1 of the battery cell 110.

[0072] Through the above technical solutions, the base 120 of this application can not only be used to position and install the battery cell 110, but also has a heat sink 121, which can increase the contact area with air, allowing air to flow rapidly on the surface of the heat sink 121 and improving heat dissipation efficiency. Furthermore, by setting the first heat transfer surface 131 around the battery cell 110, the heat transfer area between the heat-conducting component 130 and the battery cell 110 can be increased, thereby improving the heat transfer efficiency between the battery cell 110 and the base 120, which can effectively cope with the temperature rise problem caused by high-rate discharge. At the same time, compared with the liquid cooling heat exchange solution, since no cold plate is introduced, the energy storage device 100 of this application requires less space and weight, and can be better suited for application scenarios with limited space and weight.

[0073] In one example of this application, the battery cell 110 can be a cylindrical battery cell 110, and the diameter and height of the battery cell 110 can be selected according to design requirements.

[0074] In some specific implementations, the positioning structure M1 can be either a groove or a positioning rib.

[0075] In some specific implementation methods, refer to Figure 2 and Figure 6 The heat sink 121 can be constructed as heat dissipation fins, and the shape and angle of the heat dissipation fins can be selected according to actual design requirements. The heat sink 121 can be integrally formed with the base 120 by means of integral molding or welding. The base 120 and the heat sink 121 can be made of metals with good heat dissipation performance, such as aluminum and copper.

[0076] In one example of this application, the heat sink 121 can be configured with a cooling fan according to actual conditions to accelerate airflow and improve heat dissipation efficiency.

[0077] In some embodiments of this application, reference is made to Figure 2 and Figure 3 The first heat transfer surface 131 and the second heat transfer surface 132 are arranged perpendicularly.

[0078] It should be noted that the surface on which heat is transferred between the heat-conducting element 130 and the base 120 is not limited to the second heat transfer surface 132. In other words, the second heat transfer surface 132 can be the largest surface on which heat is transferred between the heat-conducting element 130 and the base 120.

[0079] With this arrangement, the first heat transfer surface 131 can be arranged around the battery cell 110, while the second heat transfer surface 132 can extend along the side surface of the base 120 near the heat conductor 130, ensuring the heat transfer area between the second heat transfer surface 132 and the base 120.

[0080] In some embodiments of this application, reference is made to Figure 2 and Figure 3 The heat-conducting element 130 is configured to have a first adapter hole 130a to accommodate at least a portion of the battery cell 110, and at least a portion of the hole wall of the first adapter hole 130a is formed by a first heat transfer surface 131.

[0081] It is understood that the first heat transfer surface 131 is continuously arranged around the central axis C1 of the battery cell 110 to form the first adapter hole 130a, through which the battery cell 110 passes and is in close contact with the first heat transfer surface 131.

[0082] By adopting this scheme, by making the first heat transfer surface 131 form the first adapter hole 130a, not only can the area of ​​the first heat transfer surface 131 be increased, but also the close contact between the first heat transfer surface 131 and the battery cell 110 can prevent the high-temperature material generated by the thermal runaway of the battery cell 110 from flowing from one end of the battery cell to the other end along the outer surface of the battery cell 110.

[0083] In some specific embodiments, the heat-conducting component 130 can be formed by a potting process, or the heat-conducting component 130 can be pre-formed and then assembled with the battery cell 110 and the base 120.

[0084] In some specific embodiments, the thermal conductivity of the heat-conducting component 130 ranges from 0.8 W / (m·K) to 5 W / (m·K). Of course, the thermal conductivity of the heat-conducting component 130 is not limited to other specifications; the material of the heat-conducting component 130 can be selected according to design requirements. More specifically, the material of the heat-conducting component 130 is at least one of organic silicone thermally conductive silicone, inorganic silicone thermally conductive silicone, and composite thermally conductive silicone.

[0085] In one example of this application, the thermal conductivity of the heat-conducting element 130 may be 1.2 W / (m·K).

[0086] In some embodiments of this application, reference is made to Figure 2 and Figure 3 Along the axial direction of the cell 110, the ratio of the height H1 of the cell 110 to the height H2 of the first heat transfer surface 131 ranges from 8 to 12.

[0087] It can be understood that the height H1 of the battery cell 110 is the distance between the two ends of the battery cell 110; the height H2 of the first heat transfer surface 131 is the distance between the two edges of the first heat transfer surface 131 in the axial direction of the battery cell 110.

[0088] The ratio of the height H1 of the battery cell 110 to the height H2 of the first heat transfer surface 131 can be at least one of 8 to 9, 9 to 10, 10 to 11, or 11 to 12.

[0089] With this approach, given a fixed diameter of the battery cell 110, the height of the first heat transfer surface 131 determines the heat transfer area between the heat-conducting element 130 and the battery cell 110. Therefore, the greater the height of the first heat transfer surface 131, the higher the heat transfer efficiency between the heat-conducting element 130 and the battery cell 110. However, considering that in the event of thermal runaway of the battery cell 110, the generated heat will also be transferred to adjacent battery cells 110 through the heat-conducting element 130, affecting the temperature of adjacent battery cells 110, this application, by limiting the ratio of the height of the battery cell 110 to the height of the first heat transfer surface 131, can ensure the heat transfer efficiency between the heat-conducting element 130 and the battery cell 110 while reducing heat transfer between adjacent battery cells 110, thereby improving the safety of the energy storage device 100.

[0090] In some embodiments of this application, reference is made to Figure 4 and Figure 6 The positioning structure M1 includes a positioning groove 120a. At least a portion of the battery cell 110 is disposed in the positioning groove 120a to achieve positioning of the battery cell 110 on the base 120.

[0091] The base 120 has a pressure relief channel 120b. The pressure relief channel 120b is correspondingly provided with the pressure relief structure of the battery cell 110; the pressure relief channel 120b is connected to the positioning groove 120a. It can be understood that the pressure relief structure of the battery cell 110 includes at least one pressure relief valve and a thinning structure, etc.

[0092] By adopting this solution and setting up the pressure relief channel 120b, the high-temperature substances generated by the thermal runaway of the battery cell 110 can be effectively released.

[0093] In some specific implementations, the pressure relief channel 120b is provided through the heat sink 121 to avoid affecting the release of high-temperature materials due to the obstruction of the heat sink 121.

[0094] In some embodiments of this application, reference is made to Figure 4 and Figure 8 The energy storage device 100 also includes an isolator 140. At least a portion of the isolator 140 is located between the pressure relief channel 120b and the battery cell 110.

[0095] It is understood that when cell 110 experiences thermal runaway, the pressure of the released high-temperature material can break through the isolation member 140 at the bottom of the runaway cell 110 and be released into the pressure relief channel 120b, and diffuse along the space at the bottom of the base 120 to the adjacent pressure relief channel 120b. As the pressure of the high-temperature material decreases during the diffusion process, it is insufficient to break through the isolation member 140 at the bottom of the adjacent cell 110, thereby preventing the high-temperature material and flame from contacting the adjacent cell 110 and causing thermal runaway, avoiding thermal diffusion between cells 110 and causing a chain of runaway, and improving the safety performance of the energy storage device 100.

[0096] Specifically, the insulating member 140 includes at least one of a heat insulation layer 141 and a fire-resistant layer 142. It is understood that by including the heat insulation layer 141 and the fire-resistant layer 142, the insulating member 140 possesses both heat-resistant and fire-resistant properties. More specifically, the heat insulation layer 141 may include aerogel; the fire-resistant layer 142 may include mica sheets, enabling the fire-resistant layer 142 to block flames.

[0097] In some embodiments of this application, reference is made to Figure 4 , Figure 6 and Figure 7 The base 120 has a first boss 122. At least a portion of the spacer 140 overlaps the first boss 122 to limit the spacer 140. More specifically, the spacer 140 is disposed in a positioning groove 120a, and the first boss 122 is formed by a portion of the sidewall of the positioning groove 120a protruding in a direction close to the central axis C1.

[0098] In some embodiments of this application, reference is made to Figure 4and Figure 9 The energy storage device 100 also includes an insulating component 150. The insulating component 150 is disposed between the conductive structure of the battery cell 110 and the base 120. It can be understood that the conductive structure of the battery cell 110 can be a structure such as the negative terminal or the positive terminal of the battery cell 110.

[0099] By adopting this solution, the conductive structure of the battery cell 110 can be prevented from directly contacting the base 120 through the setting of the insulating component 150, thereby achieving insulation protection for the conductive structure of the battery cell 110.

[0100] In some embodiments of this application, reference is made to Figure 4 , Figure 6 and Figure 7 The base 120 has a second boss 123. At least a portion of the insulating member 150 is sandwiched between the second boss 123 and the battery cell 110, thereby limiting the position of the insulating member 150. More specifically, the insulating member 150 is disposed in a positioning groove 120a, and the second boss 123 is formed by protruding from a portion of the sidewall of the positioning groove 120a toward the central axis C1.

[0101] In some specific implementation methods, refer to Figure 4 and Figure 7 The insulating member 150 includes a first insulating portion 151 and a second insulating portion 152. The first insulating portion 151 is located at the end of the battery cell 110 to provide insulation protection at the end of the battery cell 110; while the second insulating portion 152 is disposed around the periphery of the battery cell 110 to provide insulation protection around the periphery of the battery cell 110. More specifically, the first insulating portion 151 and the second insulating portion 152 are disposed perpendicularly to each other. The insulating member 150 is also provided with a clearance hole 151a to avoid the pressure relief structure of the battery cell 110. The clearance hole 151a is formed in the middle of the first insulating portion 151.

[0102] In some specific implementation methods, refer to Figure 4 On the projection plane perpendicular to the central axis C1, the projection of the isolator 140 at least partially overlaps with the projection of the first insulating part 151, thereby enabling the first insulating part 151 to prevent the isolator 140 from impacting the cell 110 under external pressure.

[0103] In some specific implementation methods, refer to Figure 9 The second insulating portion 152 is provided with a plurality of notches 152a, which are spaced apart circumferentially along the insulating member 150 and penetrate the second insulating portion 152 radially along the insulating member 150. The notches 152a provide the second insulating portion 152 with a certain elastic deformation capability, which is beneficial for the end of the battery cell 110 to be fitted into the insulating member 150.

[0104] In some specific implementation methods, refer to Figure 3 and Figure 4 The heat-conducting component 130 includes an abutting portion 133, which abuts against the insulating component 150, further improving the stability of the insulating component 150. Correspondingly, the inner side of the abutting portion 133 forms part of the first heat transfer surface 131, and the other side of the abutting portion 133 forms a third heat transfer surface 134, thereby increasing the heat transfer area between the battery cell 110 and the base 120.

[0105] In some embodiments of this application, reference is made to Figure 1 and Figure 2 The energy storage device 100 also includes a heat insulation element 160. The heat insulation element 160 has a plurality of through-holes 160a; the heat insulation element 160 is located on the side of the heat conductor 130 away from the base 120, and at least a portion of the battery cell 110 is disposed within the second adapter holes 160a.

[0106] It is understandable that the contact area between the heat insulation component 160 and the battery cell 110 is greater than the contact area between the heat-conducting component 130 and the battery cell 110, thereby ensuring the heat insulation effect of the heat insulation component 160.

[0107] By adopting this solution, the thermal insulation component 160 can be used to thermally isolate the battery cell 110 that has experienced thermal runaway, thereby reducing the diffusion of heat to adjacent battery cells 110.

[0108] In some specific embodiments, the thermal insulation component 160 may be made of materials such as polyurethane foam or ceramicized foam.

[0109] In some specific implementation methods, refer to Figure 2 and Figure 3 The heat-conducting component 130 also has a fourth heat-transfer surface 135, which is in contact with the insulating component 140. Thus, the heat of the insulating component 160 can also be transferred to the base 120 through the heat-conducting component 130, reducing the heat generated by thermal runaway of the battery cell 110 from being transferred to the adjacent battery cell 110 through the insulating component 160.

[0110] In some embodiments of this application, reference is made to Figure 1 , Figure 2 and Figure 5 The energy storage device 100 further includes a limiting member 171 and a connecting member 172. The limiting member 171 is disposed on the side of the heat insulation member 160 away from the base 120 to limit the battery cell 110 between the limiting member 171 and the base 120; the connecting member 172 is respectively passed through the heat insulation member 160 and the heat conducting member 130, and one end of the connecting member 172 is fixedly connected to the limiting member 171, and the other end is fixedly connected to the base 120.

[0111] By adopting the above scheme, the limiting component 171, the heat insulation component 160, the heat conduction component 130, the multiple battery cells 110 and the base 120 are fixed as a whole by setting the limiting component 171 and the connecting component 172, thereby improving the structural stability and reliability of the energy storage device 100.

[0112] Specifically, the limiting member 171 can be a plastic part with insulating properties, and the connecting member 172 can be made of metal materials such as aluminum, copper, and alloy steel to ensure the structural strength of the limiting member 171.

[0113] In some specific implementation methods, refer to Figure 1 The energy storage device 100 further includes: a first fastener 173 and a second fastener 174. The first fastener 173 is partially inserted through the limiting member 171 and threadedly connected to one end of the connector 172 to achieve a fixed connection between the connector 172 and the limiting member 171. The second fastener 174 is partially inserted through the base 120 and threadedly connected to the other end of the connector 172 to achieve a fixed connection between the connector 172 and the base 120.

[0114] In some embodiments of this application, reference is made to Figure 1 , Figure 2 and Figure 5 The energy storage device 100 also includes a busbar 181 and a cover plate 182.

[0115] In this embodiment, the busbar 181 is used to realize the series and parallel connection of multiple battery cells 110. The cover plate can be made of composite materials with insulating properties such as mica sheets to provide insulation protection for the busbar 181.

[0116] More specifically, the busbar 181 is positioned between the limiting member 171 and the battery cell 110, so that the limiting member 171 can also limit and fix the busbar 181, that is, the limiting member 171 is used to limit the displacement of the busbar 181 relative to the battery cell 110.

[0117] Secondly, this application provides an electrical device including the energy storage device 100 as described above.

[0118] The electrical equipment in this application embodiment has all the beneficial effects of the energy storage device 100 described above, and will not be repeated here.

[0119] In some specific implementations, the electrical equipment can be one of the following: power tools, electric two-wheelers, drones, etc.

[0120] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An energy storage device (100), characterized in that, include: Multiple battery cells (110); The base (120) has a positioning structure (M1) for positioning and mounting the battery cell (110); The heat-conducting component (130) has a first heat transfer surface (131) and a second heat transfer surface (132); At least a portion of the first heat transfer surface (131) is arranged around the battery cell (110), and the second heat transfer surface (132) is in contact with the base (120); a plurality of heat sinks (121) are provided on the side of the base (120) away from the heat conductor (130).

2. The energy storage device (100) according to claim 1, characterized in that, The first heat transfer surface (131) is arranged perpendicular to the second heat transfer surface (132).

3. The energy storage device (100) according to claim 1, characterized in that, The heat-conducting element (130) is configured to have a first adapter hole (130a) to accommodate at least a portion of the battery cell (110), the at least a portion of the hole wall of the first adapter hole (130a) being formed by the first heat transfer surface (131).

4. The energy storage device (100) according to claim 1, characterized in that, Along the axial direction of the battery cell (110), the ratio of the height of the battery cell (110) to the height of the first heat transfer surface (131) ranges from 8 to 12.

5. The energy storage device (100) according to any one of claims 1 to 4, characterized in that, The positioning structure (M1) includes: A positioning groove (120a) in which at least a portion of the battery cell (110) is disposed; The base (120) has: The pressure relief channel (120b) is provided in accordance with the pressure relief structure of the battery cell (110); The pressure relief channel (120b) is connected to the positioning groove (120a).

6. The energy storage device (100) according to claim 5, characterized in that, The energy storage device (100) further includes: An isolator (140) is located at least partially between the pressure relief channel (120b) and the battery cell (110); The isolation element (140) includes at least one of a heat insulation layer (141) and a fire-resistant layer (142); The base (120) is formed with: A first boss (122) is formed on which at least a portion of the spacer (140) overlaps.

7. The energy storage device (100) according to any one of claims 1 to 4, characterized in that, The energy storage device (100) further includes: An insulating element (150) is disposed between the conductive structure of the battery cell (110) and the base (120); The base (120) is formed with: The second boss (123) is located at least a portion of the insulating member (150) between the second boss (123) and the battery cell (110).

8. The energy storage device (100) according to any one of claims 1 to 4, characterized in that, The energy storage device (100) further includes: The heat insulation element (160) has a plurality of through-holes (160a); The heat insulation element (160) is located on the side of the heat-conducting element (130) away from the base (120), and at least a portion of the battery cell (110) is disposed within the second adapter hole (160a).

9. The energy storage device (100) according to claim 8, characterized in that, The energy storage device (100) further includes: A limiting member (171) is disposed on the side of the heat insulation member (160) away from the base (120) to limit the battery cell (110) between the limiting member (171) and the base (120); Connectors (172) are respectively inserted into the heat insulation component (160) and the heat conduction component (130); One end of the connector (172) is fixedly connected to the limiting member (171), and the other end is fixedly connected to the base (120).

10. An electrical appliance, characterized in that, Includes the energy storage device (100) as described in any one of claims 1 to 9.

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