Battery cells, batteries and electrical devices

Abstract

This invention relates to a battery cell and a battery. Since the positive and negative terminals are located on the same side of the centerline of the top cover surface, space can be left on the other side of the top cover surface, thus forming a large blank area on the surface of the top cover. This blank area provides a large support area; therefore, when assembling the battery cells into a battery, in addition to providing a cooling base plate at the bottom of multiple battery cells, a cooling top plate can also be installed in the blank area of ​​the top cover. The cooling top plate makes full contact with the top cover, effectively removing heat generated in the core heat-generating area. Therefore, the heat dissipation efficiency of the battery cell and the battery can be significantly improved. Furthermore, this invention also relates to an electrical device.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, and in particular to a battery cell, a battery, and an electrical device. Background Technology

[0002] With the continuous development of new energy technologies, the demand for energy is constantly increasing, and battery development is increasingly trending towards larger capacity and larger size. Especially in the field of energy storage, higher requirements are placed on high-current charge and discharge performance. Under high-current charge and discharge scenarios, batteries generate a huge amount of heat, so a cooling system is generally required to quickly dissipate the heat.

[0003] Due to the structural limitations of individual battery cells, existing cooling systems, such as liquid cooling plates, can only be located at the bottom of the cell. However, the main heat-generating area of ​​the battery cell is concentrated near the top terminals. Consequently, the heat generated in the core heat-generating area of ​​the battery cell cannot be quickly dissipated by the bottom cooling components, resulting in low heat dissipation efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a battery cell and battery that can improve heat dissipation efficiency to address the above problems.

[0005] A battery cell includes a housing, a cell assembly, and a top cover. The housing has an opening on one side, the cell assembly is housed within the housing, and the top cover is sealed at the opening of the housing. A positive terminal and a negative terminal are disposed on the top cover, and the positive terminal and the negative terminal are electrically connected to the positive and negative tabs of the cell assembly, respectively. The positive terminal and the negative terminal are distributed on the same side of the center line of the surface of the top cover, so that a blank area is formed on the surface of the top cover.

[0006] In one embodiment, the top cover is further provided with an explosion-proof valve and a liquid injection hole, and the explosion-proof valve and the liquid injection hole are distributed on the same side of the center line as the positive electrode and the negative electrode.

[0007] In one embodiment, the top cover is rectangular, the center line is the center line of the long side, and the positive terminal and the negative terminal are spaced apart along the width direction of the top cover.

[0008] In one embodiment, the device further includes an adapter, which includes a positive adapter piece, a negative adapter piece, and an insulating structure. The positive adapter piece is fixedly connected to the negative adapter piece and is insulated from it by the insulating structure. The two ends of the positive adapter piece are respectively welded to the positive terminal and the positive tab of the battery cell assembly, and the two ends of the negative adapter piece are respectively welded to the negative terminal and the negative tab of the battery cell assembly.

[0009] In one embodiment, the insulating structure is an insulating sheet, and the positive electrode adapter and the negative electrode adapter are respectively disposed on both sides of the insulating sheet to achieve a fixed connection.

[0010] In one embodiment, the positive electrode adapter includes a first tab welding area and a first electrode post welding area disposed opposite to the first tab welding area along a first direction, and the negative electrode adapter includes a second tab welding area and a second electrode post welding area disposed opposite to the second tab welding area along the first direction. The first tab welding area and the second tab welding area are spaced apart along the first direction, and the first electrode post welding area and the second electrode post welding area are spaced apart along a second direction perpendicular to the first direction.

[0011] A battery comprising:

[0012] Multiple battery cells as described in any of the preferred embodiments above, wherein the multiple battery cells are arranged side by side; and

[0013] A cooling assembly includes a cooling top plate that extends along the arrangement direction of the plurality of battery cells and is supported in the blank area.

[0014] In one embodiment, the cooling assembly further includes a plurality of cooling side plates perpendicular to the cooling top plate, with the cooling side plates sandwiched between two adjacent battery cells.

[0015] In one embodiment, cooling channels for the flow of cooling medium are formed within the cooling top plate and / or the cooling side plate.

[0016] Since the positive and negative terminals of the aforementioned battery cells and batteries are located on the same side of the centerline of the top cover surface, space can be left on the other side of the top cover surface, thus forming a large blank area on the surface of the top cover. This blank area provides a larger support area; therefore, when assembling the aforementioned battery cells into a battery, in addition to setting a cooling base plate at the bottom of multiple battery cells, a cooling top plate can also be installed in the blank area of ​​the top cover. The cooling top plate makes full contact with the top cover, effectively carrying away the heat generated in the core heat-generating area. Therefore, the heat dissipation efficiency of the aforementioned battery cells and batteries can be significantly improved.

[0017] In addition, the present invention also provides an electrical device.

[0018] An electrical device includes a battery cell as described in any of the preferred embodiments above or a battery as described in any of the preferred embodiments above. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial structural diagram of the battery in a preferred embodiment of the present invention;

[0021] Figure 2 for Figure 1 The diagram shown omits the cooling components and shows the battery with the busbar installed.

[0022] Figure 3 for Figure 1 The diagram shows the structural schematic of a single battery cell in the battery.

[0023] Figure 4 for Figure 3 The diagram shown is a structural schematic of a single battery cell without its casing.

[0024] Figure 5 for Figure 3 The diagram shows the structure of the adapter in the battery cell.

[0025] Figure 6 for Figure 5 Exploded view of the adapter shown;

[0026] Figure 7 for Figure 1 A top view of the cooling components in the battery shown;

[0027] Figure 8 for Figure 7 The front view of the cooling component shown. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] This invention discloses an electrical device, a battery, and a battery cell. The electrical device includes the battery or the battery cell and is capable of providing electrical energy. The electrical device can be a vehicle, mobile phone, portable device, laptop, ship, spacecraft, electric toy, power tool, energy storage device, amusement equipment, elevator, and lifting equipment, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, or electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.; energy storage devices can be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment can be carousels, drop towers, etc. This application does not impose any special restrictions on the aforementioned electrical devices.

[0035] For new energy vehicles, the aforementioned batteries can serve as a driving power source, thereby replacing fossil fuels to provide driving power.

[0036] Please see Figure 1 and Figure 2 In a preferred embodiment of the present invention, the battery 10 includes a battery cell 100 and a cooling assembly 200.

[0037] The battery cell 100 comprises multiple cells, which can be arranged in a matrix. The battery 10 can be a battery pack or a battery module. When the battery 10 is a battery pack, the multiple battery cells 100 can be electrically connected in series, parallel, or a combination of series and parallel connections, and communicate with the battery management system to form the battery pack. The battery management system controls and monitors the operating status of each battery cell 100. Alternatively, the multiple battery cells 100 can first be connected in series and / or parallel, and then connected with the module management system to form a battery module. These battery modules can then be electrically connected in series, parallel, or a combination of series and parallel connections, and together with the battery management system, form a battery pack.

[0038] The cooling assembly 200 is used to control the temperature of the multiple battery cells 100 in the battery 10 to prevent the temperature of the battery cells 100 from becoming too high.

[0039] The multiple battery cells 100 in the aforementioned battery 10 can be mounted on supporting structures such as a housing, frame, or bracket. The individual battery cells 100 and the battery management system can be electrically connected via a busbar 300. The battery cells 100 can be lithium-ion, sodium-ion, or magnesium-ion batteries, and their external contours can be cylindrical, flat, cuboid, or other shapes, but are not limited to these. To improve space utilization, the battery cells 100 in this embodiment are square batteries.

[0040] Please refer to the following: Figure 3 and Figure 4 In a preferred embodiment of the present invention, the battery cell 100 includes a housing 110, a cell assembly 120, a top cover 130, a positive terminal 140, and a negative terminal 150.

[0041] The housing 110 has a hollow structure, with internal space for accommodating the battery cell assembly 120, electrolyte, and other components. One end of the housing 110 has an opening (not shown), through which the battery cell assembly 120 can be installed. Since the housing 110 in this embodiment is intended for use with prismatic batteries, its external outline is rectangular, and its opening is approximately rectangular.

[0042] The cell assembly 120 is the core component of the battery cell 100 and is housed within the casing 110. To accommodate the shape of the casing 110, the cell assembly 120 in this embodiment is rectangular. Multiple cell assemblies 120 can be accommodated simultaneously within each casing 110, such as two cell assemblies 120, and these multiple cell assemblies 120 can be arranged side-by-side. The cell assembly 120 includes a positive electrode tab 121 and a negative electrode tab 122, which are located at the same end of the cell assembly 120. The cell assembly 120 can be formed by winding or stacking positive electrode sheets, negative electrode sheets, and a separator that acts as an insulator between the negative and positive electrode sheets. A cell assembly 120 formed by winding can be pressed into a flat shape.

[0043] The top cover 130 is sealed at the opening of the housing 110 to create a relatively closed environment inside the housing 110, thereby isolating the battery cell assembly 120 from the external environment. The top cover 130 may be formed from a material with high mechanical strength, such as aluminum, aluminum alloy, or stainless steel. The shape of the top cover 130 is adapted to the shape of the opening of the housing 110; specifically, in this embodiment, the top cover 130 is generally rectangular.

[0044] Positive terminal 140 and negative terminal 150 are disposed on top cover plate 130 and electrically connected to positive terminal tab 121 and negative terminal tab 122 of cell assembly 120, respectively. Both positive terminal 140 and negative terminal 150 are insulated from top cover plate 130 to prevent short circuits. Furthermore, positive terminal 140 and negative terminal 150 are distributed on the same side of the center line of the surface of top cover plate 130, forming a blank area 101 on the surface of top cover plate 130. Since top cover plate 130 is rectangular, the center line refers to the center line of the long side, that is, the line connecting the midpoints of the two long sides of top cover plate 130.

[0045] That is to say, the positive terminal 140 and the negative terminal 150 face one side on the surface of the top cover plate 130. Figure 3 (As shown on the right) is offset. This allows the other side of the surface of the top cover plate 130 (as shown on the right) to be offset. Figure 3 The space on the left side (as shown) is left to form a blank area 101. The blank area 101 does not have a positive terminal 140 or a negative terminal 150 and has a large area. Therefore, the top cover 130 can provide a large support area, which facilitates the placement of the cooling assembly 200 on the top of the battery cell 100 to improve the heat dissipation efficiency of the battery cell 100.

[0046] For details, please refer to the following document again. Figure 1 The cooling assembly 200 includes a cooling top plate 210, which extends along the arrangement direction of the multiple battery cells 100 and rests on the blank area 101. For cases where the multiple battery cells 100 are arranged in multiple rows, multiple cooling top plates 210 can be correspondingly provided. The cooling top plate 210 can fully contact the top cover plate 130, and the core heat-generating area of ​​the battery cell 100 is located near the top cover plate 130. Therefore, the cooling assembly 200 can quickly remove the heat generated by the core heat-generating area of ​​the battery cell 100.

[0047] To further improve the heat dissipation efficiency of the battery cell 100, the surface of the blank area 101 can also be provided with structures such as heat dissipation teeth and heat dissipation grooves to increase the heat dissipation area of ​​the blank area 101. In addition, the cooling assembly 200 may also include a cooling base plate (not shown) disposed at the bottom of the multiple battery cells 100. The cooling base plate cooperates with the cooling top plate 210 to exchange heat with the battery cells 100 from both the top and bottom ends, thereby improving the heat dissipation efficiency of the battery 10.

[0048] Please refer to the following: Figure 7 and Figure 8In this embodiment, the cooling assembly 200 further includes multiple cooling side plates 220 perpendicular to the cooling top plate 210, with the cooling side plates 220 sandwiched between two adjacent battery cells 100. The cooling side plates 220 are in contact with the sides of the battery cells 100, and can carry away the heat generated by the battery cells 100 from the sides. Therefore, the cooling assembly 200 can form a three-dimensional cooling effect for each battery cell 100, thereby further improving the heat dissipation efficiency of the battery 10.

[0049] Specifically, the cooling top plate 210 and multiple cooling side plates 220 form a comb-like structure. The width of the cooling side plates 220 ( Figure 7 The vertical dimension is generally larger than the width of the cooling top plate 210, so the cooling side plate 220 can extend to the entire side of the battery cell 100.

[0050] Furthermore, in this embodiment, cooling channels (not shown) for the flow of cooling medium are formed within the cooling top plate 210 and / or the cooling side plate 220. When cooling channels are formed in both the cooling top plate 210 and the cooling side plate 220, the cooling channels within both can be connected. When the cooling medium flows along the cooling channels, it can exchange heat with the cooling top plate 210 and the cooling side plate 220, quickly removing heat and thereby improving the heat exchange efficiency between the cooling top plate 210 and the cooling side plate 220 and the battery cell 100.

[0051] It should be noted that in other embodiments, the cooling top plate 210 and the cooling side plate 220 may also be finned structures and dissipate heat through a large surface area.

[0052] Please refer to it again. Figure 2 Because the positive terminal 140 and the negative terminal 150 are offset to one side on the surface of the top cover 130, the battery cells 100 have a natural foolproof feature when assembled into the battery 10. If a battery cell 100 is installed in the wrong direction, the positive terminal 140 and the negative terminal 150 of that battery cell 100 will be reversed compared to the positive terminal 140 and the negative terminal 150 of the other battery cells 100, thus making it easy to identify.

[0053] When multiple battery cells 100 are arranged in parallel, their positive terminals 140 and negative terminals 150 are alternately arranged, which facilitates the busbar 300 to connect the positive terminals 140 and negative terminals 150 of two consecutive battery cells 100 in sequence. In this way, when multiple battery cells 100 are electrically connected in series, it has excellent error detection capability, can effectively avoid incorrect series connection, and the series structure is extremely simple.

[0054] Please refer to it again. Figure 3 and Figure 4In this embodiment, the top cover plate 130 is also provided with an explosion-proof valve 131 and a liquid injection hole 132. The explosion-proof valve 131 and the liquid injection hole 132 are distributed on the same side of the center line as the positive electrode post 140 and the negative electrode post 150.

[0055] When the gas pressure inside the housing 110 exceeds a threshold, the explosion-proof valve 131 opens to release pressure inside the housing 110, thereby preventing the battery cell 100 from exploding. After the top cover 130 seals the opening of the housing 110, electrolyte can be injected into the housing 110 through the injection hole 132. After the injection is completed, the injection hole 132 is generally sealed by laser welding.

[0056] Furthermore, since the explosion-proof valve 131 and the injection port 132 are located on the same side as the positive terminal 140 and the negative terminal 150, the explosion-proof valve 131 and the injection port 132 do not occupy the space of the blank area 101.

[0057] In this embodiment, the positive terminal 140 and the negative terminal 150 are spaced apart along the width direction of the top cover plate 130. Thus, when multiple battery cells 100 are arranged side-by-side, their positive terminal 140 and negative terminal 150 are linearly aligned, making it easier for the busbar 300 to connect to the positive terminal 140 and negative terminal 150. Furthermore, the increased distance between the positive terminal 140 and the negative terminal 150 also facilitates welding them to the positive electrode tab 121 and the negative electrode tab 122.

[0058] Please refer to the following: Figure 5 and Figure 6 In this embodiment, the battery cell 100 further includes an adapter 160, which includes a positive electrode adapter 161, a negative electrode adapter 162, and an insulating structure 163. The positive electrode adapter 161 and the negative electrode adapter 162 are fixedly connected and insulated from each other by the insulating structure 163. The two ends of the positive electrode adapter 161 are respectively welded to the positive electrode post 140 and the positive electrode tab 121 of the cell assembly 120, and the two ends of the negative electrode adapter 162 are respectively welded to the negative electrode post 150 and the negative electrode tab of the cell assembly 120.

[0059] The insulating structure 163 can be an insulating sheet formed from insulating materials such as rubber, or it can be an insulating coating, which can form insulation between the positive electrode adapter 161 and the negative electrode adapter 162. The aforementioned adapter 160 is an integrated structure that can replace the traditionally separately set positive and negative electrode adapters, thus reducing the number of components and simplifying the work stations required for assembly, thereby effectively reducing manufacturing costs and improving processing efficiency.

[0060] Specifically, in this embodiment, the insulating structure 163 is an insulating sheet, and the positive electrode adapter 161 and the negative electrode adapter 162 are respectively disposed on both sides of the insulating sheet to achieve a fixed connection. It can be seen that the insulating structure 163 can not only play the role of insulation, but also provide support for the positive electrode adapter 161 and the negative electrode adapter 162, thereby making the structure of the adapter 160 simpler.

[0061] Furthermore, in this embodiment, a clearance groove 1601 is formed between the positive electrode adapter 161 and the negative electrode adapter 162, which is opposite to the explosion-proof valve 131, and a clearance hole 1631 opposite to the liquid injection hole 132 is provided on the insulating structure 163. The clearance groove 1601 can prevent the adapter 160 from blocking the explosion-proof valve 131, while the clearance hole 1631 can prevent the adapter 160 from blocking the liquid injection hole 132.

[0062] Furthermore, in this embodiment, the positive electrode adapter 161 includes a first tab welding area 1611 and a first electrode post welding area 1612 disposed opposite to the first tab welding area 1611 along a first direction, and the negative electrode adapter 162 includes a second tab welding area 1621 and a second electrode post welding area 1622 disposed opposite to the second tab welding area 1621 along a first direction. The first tab welding area 1611 and the second tab welding area 1621 are spaced apart along the first direction, and the first electrode post welding area 1612 and the second electrode post welding area 1622 are spaced apart along a second direction perpendicular to the first direction.

[0063] Specifically, the first direction refers to the length direction of the top cover plate 130, and the second direction refers to the width direction of the top cover plate 130. The positive electrode tab 121 and the negative electrode tab 122 are generally spaced apart along the first direction, i.e., the length direction of the top cover plate 130. Therefore, providing the first electrode tab welding area 1611 and the second electrode tab welding area 1621 facilitates connecting the positive electrode tab 121 and the negative electrode tab 122 to the positive electrode adapter plate 161 and the negative electrode adapter plate 162, respectively. The first electrode post welding area 1612 and the second electrode post welding area 1622 are flush in the first direction and spaced apart along the second direction, thus enabling the positive and negative electrodes of the battery cell assembly 120 to be transferred to the positive electrode post 140 and the negative electrode post 150 located on the same side of the top cover plate 130.

[0064] The insulation structure 163 can be fully enclosed, meaning that except for the first tab welding area 1611, the first pole welding area 1612, the second tab welding area 1621, and the second pole welding area 1622, all other areas of the positive electrode adapter 161 and the negative electrode adapter 162 are covered by the insulation structure 163. Alternatively, the insulation structure 163 can be partially enclosed, covering only a small portion of the positive electrode adapter 161 and the negative electrode adapter 162, as long as insulation between the two is maintained.

[0065] Since the positive electrode post 140 and the negative electrode post 150 of the aforementioned battery cell 100 and battery 10 are distributed on the same side of the center line of the top cover plate 130, space can be left on the other side of the top cover plate 130 surface, thus forming a large blank area 101 on the surface of the top cover plate 130. The blank area 101 can provide a large support area, so when assembling the aforementioned battery cells 100 into battery 10, in addition to setting a cooling base plate at the bottom of multiple battery cells 100, a cooling top plate 210 can also be installed in the blank area 101 of the top cover plate 130. The cooling top plate 210 is in full contact with the top cover plate 130, which can remove the heat generated by the core heat-generating area. Therefore, the heat dissipation efficiency of the aforementioned battery cell 100 and battery 10 can be significantly improved.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A battery, characterized in that, The device includes individual battery cells and a cooling assembly. Multiple individual battery cells are arranged side-by-side. Each individual battery cell includes a housing, a cell assembly, and a top cover. The housing has an opening on one side, and the cell assembly is housed within the housing. The top cover is sealed within the opening of the housing. A positive terminal and a negative terminal are provided on the top cover. The positive and negative terminals are electrically connected to the positive and negative tabs of the cell assembly, respectively. The positive and negative terminals are distributed on the same side of the centerline of the top cover surface, creating a blank area on the other side of the top cover surface where the positive and negative terminals are not located. The top cover is rectangular, with the centerline being the centerline of the longer side. The positive and negative terminals are spaced apart along the width of the top cover, and the centerline of the longer side is a line connecting the midpoints of the two longer sides of the top cover. The battery cell also includes an adapter, which includes a positive electrode adapter, a negative electrode adapter, and an insulating structure. The positive electrode adapter is fixedly connected to the negative electrode adapter and is insulated from it by the insulating structure. The two ends of the positive electrode adapter are respectively welded to the positive electrode post and the positive electrode tab of the battery cell assembly. The two ends of the negative electrode adapter are respectively welded to the negative electrode post and the negative electrode tab of the battery cell assembly. The positive electrode adapter includes a first tab welding area and a first electrode post welding area disposed opposite to the first tab welding area along a first direction. The negative electrode adapter includes a second tab welding area and a second electrode post welding area disposed opposite to the second tab welding area along the first direction. The first tab welding area and the second tab welding area are spaced apart along the first direction. The first electrode post welding area and the second electrode post welding area are spaced apart along a second direction perpendicular to the first direction. The cooling assembly includes a cooling top plate that extends along the arrangement direction of the plurality of battery cells and is supported in the blank area.

2. The battery according to claim 1, characterized in that, The top cover is also provided with an explosion-proof valve and a liquid injection hole, and the explosion-proof valve and the liquid injection hole are distributed on the same side of the center line as the positive terminal and the negative terminal.

3. The battery according to claim 1, characterized in that, The insulating structure is an insulating sheet, and the positive electrode adapter and the negative electrode adapter are respectively disposed on both sides of the insulating sheet to achieve a fixed connection.

4. The battery according to claim 1, characterized in that, The cooling assembly also includes multiple cooling side plates perpendicular to the cooling top plate, with the cooling side plates sandwiched between two adjacent battery cells.

5. The battery according to claim 4, characterized in that, Cooling channels for the flow of cooling medium are formed within the cooling top plate and / or the cooling side plate.

6. An electrical device, characterized in that, Includes the battery as described in any one of claims 1 to 5 above.

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