Battery and electric device

Abstract

The application relates to a battery and a power utilization device. The battery comprises a box body, a plurality of side plate groups arranged in the box body and arranged at intervals along the width direction of the box body, a placing space being formed between every two adjacent side plate groups, each side plate group comprising a liquid cooling side plate and a reinforcing side plate, the reinforcing side plate being supported on the bottom side of the liquid cooling side plate along the height direction of the box body, a battery cell corresponding to the placing space one by one, the battery cell being arranged in the corresponding placing space, the battery cell comprising a battery module, the battery module having a pole and a heat exchange side surface facing the side plate group, the heat exchange side surface comprising a top region and a non-top region, the pole protruding from the top region along the height direction of the box body; wherein the liquid cooling side plate is in heat conduction connection with the top region of the heat exchange side surface arranged thereon, and the reinforcing side plate is connected with the non-top region of the heat exchange side surface arranged thereon. The battery and the power utilization device in the application can improve the heat exchange efficiency.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery and an electrical device. Background Technology

[0002] Batteries have strict requirements on temperature during use. Designing batteries to have high heat exchange efficiency so that they are not affected by temperature during high-rate charging and discharging is of paramount importance.

[0003] In related technologies, the focus is usually on cooling the bottom of the battery. However, this bottom cooling method has certain limitations. Although it can achieve a certain heat exchange effect, it still suffers from low heat exchange efficiency, high cell temperature after heat exchange, and uneven cell temperature, which affects the charging and discharging performance and lifespan of the cell. Utility Model Content

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

[0005] On one hand, this application provides a battery comprising:

[0006] Box;

[0007] Multiple side panel assemblies are disposed inside the box and spaced apart along the width direction of the box. A placement space is defined between each pair of adjacent side panel assemblies. Each side panel assembly includes a liquid-cooled side panel and a reinforcing side panel. The reinforcing side panel is supported on the bottom side of the liquid-cooled side panel along the height direction of the box.

[0008] A battery unit corresponds to a placement space. The battery unit is disposed in the corresponding placement space. The battery unit includes a battery module. The battery module has a terminal post and a heat exchange side facing the side plate group. The heat exchange side includes a top area and a non-top area. The terminal post protrudes from the top area along the height direction of the housing.

[0009] The liquid-cooled side plate is thermally connected to the top region of the heat exchange side facing it, and the reinforced side plate is connected to the non-top region of the heat exchange side facing it.

[0010] In some embodiments, the battery module includes a plurality of battery cells, each battery cell extending along the height direction of the housing and having a first side and a second side arranged adjacent to each other. The area of ​​the first side is larger than the area of ​​the second side. The first sides of every two adjacent battery cells in the battery module are arranged opposite to each other. The second sides of all the battery cells in the battery module located on the same side together form the heat exchange side of the battery module located on that side.

[0011] In some embodiments, the heat exchange side has a dimension of H in the height direction of the housing, the liquid-cooled side plate has a dimension of H1 in the height direction of the housing, H / 3≤H1≤H / 2; and / or the housing includes a liquid-cooled bottom plate.

[0012] In some embodiments, the reinforcing side plate extends along the height direction of the housing from the liquid-cooled side plate to the flange of the bottom insulating film of the battery module.

[0013] In some embodiments, the battery includes multiple partition beams, all of which are spaced apart along the length of the housing and divide the placement space into multiple sub-placement spaces. Each battery unit has multiple battery modules, which correspond one-to-one with the sub-placement spaces. Each battery module is located in the corresponding sub-placement space.

[0014] The side plate assembly has multiple reinforcing side plates, and each reinforcing side plate of the side plate assembly corresponds one-to-one with the sub-placement space formed on each side of the side plate assembly. The reinforcing side plate is located between the two partition beams that define its corresponding sub-placement space.

[0015] The partition beam has multiple clearance slots, and each clearance slot on the partition beam corresponds to a liquid-cooled side plate of each side plate assembly. The liquid-cooled side plate passes through the clearance slot on the partition beam that corresponds to the liquid-cooled side plate.

[0016] In some embodiments, there are at least three partition beams, with the first partition beam defined as the first partition beam, the last partition beam as the last partition beam, and the partition beam located between the first partition beam and the last partition beam as the middle partition beam.

[0017] The liquid-cooled side plate includes a side plate body, inlet / outlet connectors, and flow channel reversing connectors. The side plate body has a liquid-cooled flow channel for the flow of coolant. The inlet / outlet connectors and the flow channel reversing connectors are respectively sleeved on opposite ends of the side plate body. The inlet / outlet connectors pass through the clearance groove of the first and second partition beams. The side plate body passes through the clearance groove of the middle partition beam. The flow channel reversing connectors pass through the clearance groove of the last partition beam.

[0018] In some embodiments, at least one of the inlet / outlet connector and the flow channel reversing connector is provided with a buffer between itself and the sidewall of the clearance groove through which it passes.

[0019] And / or, structural adhesive is filled between at least one of the inlet / outlet connector and the flow channel reversing connector and the bottom wall of the clearance groove through which it passes.

[0020] In some embodiments, each of the clearance grooves on the intermediate partition beam is provided with a limiting member, and a limiting notch is provided on the limiting member. The liquid-cooled side plate passes through the limiting notch on the limiting member and is engaged with the limiting notch.

[0021] The limiting element is a heat-insulating element or a non-heat-insulating element; and / or, a heat-insulating pad is provided between the limiting element and the bottom wall of the clearance groove where it is located.

[0022] In some embodiments, at least one side of the liquid-cooled side plate arranged along the width direction of the housing, and / or at least one side of the reinforcing side plate arranged along the width direction of the housing, are provided with adhesive limiting components. The adhesive limiting components include a first adhesive limiting element and a second adhesive limiting element. The first adhesive limiting element and the second adhesive limiting element in the adhesive limiting components are spaced apart along the height direction of the housing at the top and bottom of the liquid-cooled side plate and / or the reinforcing side plate, respectively, and define an adhesive-containing space for accommodating structural adhesive.

[0023] In some embodiments, the reinforcing side plate and the liquid-cooled side plate of the side plate assembly are either integrally formed or separately formed;

[0024] And / or, the reinforced side plate has a hollow flow channel for weight reduction;

[0025] And / or, the reinforcing side plate is one of epoxy board and polycarbonate board;

[0026] And / or, the reinforcing side plate extends from the liquid-cooled side plate to the bottom surface of the battery module along the height direction of the housing.

[0027] On the other hand, this application provides an electrical device comprising a battery as described in any of the above embodiments, the battery being used to provide electrical energy to the electrical device. Compared with the prior art, this application has the following advantages:

[0028] The aforementioned battery and electrical device, along with the liquid-cooled side plate and reinforced side plate, enable dual-sided cooling of the battery module. The liquid-cooled side plate cools the hotter top area of ​​the battery module, mitigating the problem of excessively rapid temperature rise in this area and preventing overheating and uneven temperature distribution. The reinforced side plate supports and maintains the position of the liquid-cooled side plate, allowing it to fully utilize its cooling function. Furthermore, the reinforced side plate provides both thermal conductivity and insulation. Thermal conductivity increases the heat transfer path in non-top areas, while thermal insulation reduces the risk of heat dissipation and minimizes the temperature difference between individual battery cells. The combined use of the liquid-cooled and reinforced side plates improves heat exchange efficiency, ensuring better charge and discharge performance of the battery cells, extending their lifespan, and enhancing the structural strength and overall reliability of the battery. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the battery structure in one embodiment of this application;

[0030] Figure 2 for Figure 1 The diagram shows the structure of the battery after the top plate has been removed.

[0031] Figure 3 for Figure 2 The diagram shows the structure of a single battery cell in the battery.

[0032] Figure 4 for Figure 3 An enlarged schematic diagram of a local structure M in a single battery cell is shown.

[0033] Figure 5 for Figure 2 The diagram shown is a structural schematic of a battery with the first end plate, first side plate, and second side plate removed.

[0034] Figure 6 for Figure 5 The diagram shown is a structural schematic of the battery after the battery cells have been removed.

[0035] Figure 7 for Figure 6 The diagram shows the structure of the battery after it has been rotated at a certain angle.

[0036] Figure 8 for Figure 7 An enlarged schematic diagram of a local structure C in the battery shown;

[0037] Figure 9 for Figure 7 The diagram shows the structure of the battery after it has been rotated approximately 180°.

[0038] Figure 10 for Figure 9An enlarged schematic diagram of a local structure D in the battery shown;

[0039] Figure 11 for Figure 10 The diagram shows a battery with added buffer components.

[0040] Figure 12 for Figure 7 The diagram shown is a structural schematic of the battery after the side panel assembly has been removed.

[0041] Figure 13 This is a schematic diagram of the battery structure in another embodiment with the top plate, first end plate, first side plate and second side plate removed;

[0042] Figure 14 for Figure 13 An enlarged schematic diagram of a local structure W in the battery shown.

[0043] Icon labels:

[0044] 100. Battery;

[0045] 10. Housing; 20. Side panel assembly; 30. Battery unit; 40. Separator beam; 50. Buffer component; 60. Limiting component; 70. Adhesive limiting assembly;

[0046] 11. Top plate; 12. Bottom plate; 13. First end plate; 14. Second end plate; 15. First side plate; 16. Second side plate;

[0047] 21. Liquid-cooled side plate; 211. Liquid inlet / outlet connector; 212. Side plate body; 213. Flow channel reversing connector; 22. Reinforced side plate; 23. Placement space; 231. Sub-placement space;

[0048] 31. Battery module; 311. Heat exchange side; 312. Battery cell; 3121. Battery cell body; 3122. First side; 3123. Second side; 3124. Terminal post; 3125. Flanged edge;

[0049] 40a, First dividing beam; 40b, Middle dividing beam; 40c, Last dividing beam; 41, Clearance slot; 411, First sub-slot; 412, Second sub-slot;

[0050] 61. Limiting gap;

[0051] 71. First adhesive limiting component; 72. Second adhesive limiting component; 73. Adhesive-containing space;

[0052] X, length direction; Y, width direction; Z, height direction. Detailed Implementation

[0053] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are 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 this application. However, this application can be implemented 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 this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0054] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "level", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0055] 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 application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, unless otherwise expressly 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," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the liquid level of the first feature is higher than that of 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 indicates that the liquid level of the first feature is lower than that of the second feature.

[0058] 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.

[0059] Batteries have strict requirements on temperature during use. Designing batteries to have high heat exchange efficiency so that they are not affected by temperature during high-rate charging and discharging is of paramount importance.

[0060] In related technologies, the focus is usually on cooling the bottom of the battery. However, this bottom cooling method has certain limitations. Although it can achieve a certain heat exchange effect, it still suffers from low heat exchange efficiency, high cell temperature after heat exchange, and uneven cell temperature, which affects the charging and discharging performance and lifespan of the cell.

[0061] Please see Figures 1 to 6 To alleviate the aforementioned problems, the applicant, after in-depth research, designed a battery 100. The battery 100 includes a housing 10, multiple side plate assemblies 20, and battery units 30. All side plate assemblies 20 are disposed within the housing 10 and spaced apart along the width direction Y of the housing 10. A placement space 23 is defined between each pair of adjacent side plate assemblies 20. Each side plate assembly 20 includes a liquid-cooled side plate 21 and a reinforcing side plate 22. The reinforcing side plate 22 is supported on the bottom side of the liquid-cooled side plate 21 along the height direction Z of the housing 10. Each battery unit 30 corresponds to a placement space 23 and is disposed within that space. Each battery unit 30 includes a battery module 31, which has terminals 3124 and a heat exchange side surface 311 facing the side plate assembly 20. The heat exchange side surface 311 includes a top area (e.g., ...). Figure 5 The area indicated by the middle arrow A) and non-top areas (such as...) Figure 5 (The area indicated by the middle arrow B), the pole post 3124 protrudes from the top area along the height direction Z of the housing 10. Among them, the liquid-cooled side plate 21 is thermally connected to the top area of ​​the heat exchange side plate 311 facing it, and the reinforcing side plate 22 is connected to the non-top area of ​​the heat exchange side plate 311 facing it.

[0062] The housing 10 primarily serves for installation and storage, and is generally rectangular in shape. The housing 10 is constructed from a top plate 11, a bottom plate 12, a first end plate 13, a second end plate 14, a first side plate 15, and a second side plate 16. The first end plate 13 and the second end plate 14 are spaced apart along the length (X) of the housing 10, and the first side plate 15 and the second side plate 16 are spaced apart along the width (Y) of the housing 10. All four end plates are connected between the top plate 11 and the bottom plate 12.

[0063] Each battery unit 30 corresponds to a placement space 23 and is disposed within the corresponding placement space 23. Each battery unit 30 may include one or more battery modules 31. If a battery unit 30 includes multiple battery modules 31, all battery modules 31 in the same battery unit 30 are arranged sequentially along the length direction X of the housing 10. The two sides of the battery modules 31 that are positioned opposite each other along the width direction Y of the housing 10 form heat exchange sides 311.

[0064] The battery module 31 includes multiple battery cells 312. All battery cells 312 in the same battery module 31 are arranged along the length direction X of the housing 10 and are electrically connected in series, parallel, or mixed directions to form a whole. Each battery cell 312 includes a battery cell body 3121 and a terminal post 3124. The battery cell body 3121 extends along the height direction Z of the housing 10 and has a top surface and a side surface. The terminal post 3124 is located on the top surface of the battery cell. In the same battery module 31, all battery cell bodies 3121 located on the same side and facing the side plate assembly 20 together form the heat exchange side 311 of that side of the battery module 31.

[0065] The heat exchange side 311 includes a top region and a non-top region. The top region is located close to the terminal post 3124, while the non-top region is located away from the terminal post 3124. During the operation of the battery 100, because the terminal post 3124 has a smaller surface area than the battery cell body 3121, and the current passing through the terminal post 3124 is relatively large, a lot of heat is generated during prolonged energization. Therefore, the heat is concentrated at the terminal post 3124 and is difficult to disperse effectively. That is, the top region is closer to the terminal post 3124 than the non-top region, resulting in a higher temperature in the top region compared to the non-top region. At the same time, if the base plate 12 is a liquid-cooled base plate and acts on the bottom of the battery cell 312 (the cooling method of the liquid-cooled base plate 12 forms the bottom cooling method mentioned above), the distance from the top of the battery cell 312 is relatively large, and the heat cannot be quickly transferred to the terminal post 3124 at the top of the battery cell 312. This further increases the temperature difference between the bottom and top of the battery cell 312, causing uneven temperature distribution in the battery cell 312 and affecting the performance and lifespan of the battery cell 312. It is understood that the top region of the battery cell 312 and the terminal post 3124 are both within the area defined by the top of the battery cell 312.

[0066] There are at least two sets of side panel assemblies 20, and the specific number of sets can be set according to the space inside the box 10.

[0067] The liquid-cooled side plate 21 is bonded to the heat exchange side plate 311 using thermally conductive structural adhesive to achieve a thermally conductive connection between the liquid-cooled side plate 21 and the heat exchange side plate 311. The liquid-cooled side plate 21 has liquid-cooled flow channels for the flow of coolant. The liquid-cooled side plate 21 is thermally connected to the top region of the heat exchange side plate 311 facing it. The liquid-cooled side plate 21 acts as a thermal bridge, transferring heat between the top region of the heat exchange side plate 311 and the coolant to cool the top region, thereby cooling the battery module 31 and further reducing the temperature difference between the individual battery cells 312.

[0068] Therefore, by placing the battery module 31 within the placement space 23 formed by the adjacent side plate groups 20, and with the cooperation of the side plate groups 20 on both sides of the battery module 31, the heat exchange area of ​​the battery module 31 is increased, enabling double-sided cooling of the battery module 31 with high heat exchange efficiency and good cooling effect. Moreover, the liquid-cooled side plate 21 is thermally connected to the top area of ​​the heat exchange side 311 facing it, allowing the liquid-cooled side plate 21 to exchange heat and cool the relatively higher top area, thereby improving the problem of excessively rapid temperature rise in the higher top area, avoiding overheating and uneven temperature of the battery cells 312, reducing the safety risks of overheating and uneven temperature of the battery cells 312, improving the charging and discharging performance of the battery cells 312, and extending the service life of the battery cells 312.

[0069] The reinforced side plate 22 can be bonded to the non-top area of ​​the heat exchange side 311 using thermal insulation structural adhesive or thermally conductive structural adhesive.

[0070] The reinforcing side plate 22 has superior mechanical strength. For example, the reinforcing side plate 22 can be either an epoxy board or a polycarbonate board. The reinforcing side plate 22, with its superior mechanical strength, supports the liquid-cooled side plate 21 below, allowing the supported liquid-cooled side plate 21 to be maintained in a set position and effectively cool the battery module 31. Furthermore, the reinforcing side plate 22 fills the space between the liquid-cooled side plate 21 and the bottom plate 12 of the housing 10, thus maintaining and improving the modal and structural strength of the entire battery 100.

[0071] For example, the reinforcing side plate 22 can be a heat-conducting plate or a heat-insulating plate.

[0072] Taking the reinforced side plate 22 as a heat-conducting plate as an example, the reinforced side plate 22 is connected to the non-top area of ​​the heat exchange side plate 311 facing it. Therefore, the reinforced side plate 22 can act as a heat-conducting bridge to transfer the heat from the non-top area of ​​the heat exchange side plate 311 connected to it to the liquid-cooled side plate 21, thereby increasing the heat transfer path of the non-top area of ​​the heat exchange side plate 311. That is, the heat transfer path of the non-top area of ​​the heat exchange side plate 311 is not limited to being transferred to the liquid-cooled side plate 21 through the top area, but can also be transferred to the liquid-cooled side plate 21 through the reinforced side plate 22. The increased heat transfer path of the non-top area of ​​the heat exchange side plate 311 results in a better cooling effect in the non-top area of ​​the heat exchange side plate 311, thereby further preventing the battery cell 312 from overheating and experiencing uneven temperature, resulting in excellent heat exchange performance.

[0073] Taking the reinforced side plate 22 as an example of a heat insulation plate, the reinforced side plate 22 can be either an epoxy board or a polycarbonate board. The reinforced side plate 22 is thermally insulated with the non-top area of ​​the heat exchange side plate 311 facing it, so that the top area and non-top area of ​​the battery cell 312 can be insulated. When the liquid-cooled bottom plate 12 is provided at the bottom of the battery cell 312, the temperature difference between the top area and non-top area of ​​the battery cell 312 can be reduced. At the same time, the heat exchange side plates 311 of two adjacent battery cells 30 can be insulated with the reinforced side plate 22. In this way, the degree of heat interference between two adjacent battery cells 30 is small, which reduces the risk of heat diffusion from battery cell 30 affecting the service life of other battery cells 30. In this case, the heat in the battery cell 30 is cooled by the liquid-cooled side plate 21 that is thermally connected to it. When the heat load of the battery cell 30 increases, the risk of increased heat load can be dealt with by increasing the flow rate of the coolant or decreasing the temperature of the coolant.

[0074] As described above, the liquid-cooled side plate 21 and the reinforced side plate 22 in this application enable dual-sided cooling of the battery module 31, particularly cooling the hotter top area of ​​the battery module 31. The reinforced side plate 22 supports and maintains the position of the liquid-cooled side plate 21, allowing it to fully utilize its cooling function. Furthermore, the reinforced side plate 22 provides both thermal conductivity and insulation. Thermal conductivity increases the heat transfer path in the non-top area, while thermal insulation reduces the risk of heat dissipation and decreases the temperature difference between battery cells 312. The combined effect of the liquid-cooled side plate 21 and the reinforced side plate 22 improves heat exchange efficiency, ensuring better charge and discharge performance of the battery cells 312, extending their lifespan, and enhancing the structural strength and overall reliability of the battery.

[0075] It is worth mentioning that, in this application, in the arrangement direction of the side plate group 20, the side plate group 20 located at the first position is defined as the first side plate group, the side plate group 20 located at the last position is defined as the last side plate group, and the side plate group 20 located between the first and last side plate groups is defined as the middle side plate group. In the first and last side plate groups, the liquid-cooled side plates 21 have only one side facing the top area of ​​the heat exchange side 311 of the battery module 31, while the liquid-cooled side plates 21 in the middle side plate group have opposite sides facing the top areas of the liquid-cooled side plates 21 of different battery modules 31.

[0076] Please refer to it again. Figure 3 and Figure 5 Furthermore, in some embodiments, the battery cell 312 extends along the height direction Z of the housing 10 and has a first side 3122 and a second side 3123 arranged adjacently. The area of ​​the first side 3122 is larger than the area of ​​the second side 3123. The first side 3122 of each pair of adjacent battery cells 312 in the battery module 31 are arranged opposite to each other. The second side 3123 of all battery cells 312 in the battery module 31 located on the same side together form the heat exchange side 311 of the battery module 31 located on that side.

[0077] It is understood that the first side 3122 and the second side 3123 are both sides of the battery cell, and the first side 3122 is the wide side of the battery cell 312, and the second side 3123 is the narrow side of the battery cell 312. The first side 3122 and the second side 3123 are both located on the battery cell body 3121 and are both adjacent to the top surface of the battery cell.

[0078] In the battery module 31, the first side surface 3122 between two adjacent battery cells 312 are arranged opposite each other. Therefore, when all the battery cells 312 in the battery module 31 are stacked, the first side surface 3122 is the contact area between two adjacent battery cells 312. This design can increase the contact area between two adjacent battery cells 312, making the stacking arrangement more stable. The second side surface 3123 of all the battery cells 312 in the battery module 31, located on the same side, together form the heat exchange side surface 311 of the battery module 31, and is thermally connected to the liquid cooling side plate 21 facing it. This allows the battery module 31 to be cooled through the liquid cooling side plate 21, preventing the battery cells 312 from overheating and causing uneven temperature distribution.

[0079] In some embodiments, the dimension of the heat exchange side 311 in the height direction Z of the housing 10 is H, and the dimension of the liquid-cooled side plate 21 in the height direction Z of the housing 10 is H1, where H / 3≤H1≤H / 2. That is, the liquid-cooled side plate 21 is disposed on the heat exchange side 311 extending downward from the top surface of the battery cell to H1. In this case, only the liquid-cooled side plate 21 can be disposed (at this time, the bottom plate 12 of the housing 10 is a plate without liquid cooling function), so as to improve heat exchange efficiency, save energy consumption, and avoid waste of cooling capacity.

[0080] In some embodiments, when the bottom plate of the housing 10 is a liquid-cooled bottom plate 12, actual tests show that the top temperature of the battery cell 312 is the highest and the bottom temperature is the lowest. If the liquid-cooled side plate 21 is provided on the entire heat exchange side 311, that is, extending from the top of the battery cell 312 to the bottom along the height direction Z of the housing 10, the non-top area of ​​the heat exchange side 311 will be cooled by both the liquid-cooled bottom plate 12 and the liquid-cooled side plate 21, resulting in wasted cooling efficiency and increased overall weight. Therefore, when the liquid-cooled bottom plate 12 is provided, it is preferable to use the liquid-cooled side plate 12 for local cooling, and set the dimension of the liquid-cooled side plate 12 in the height direction Z of the housing 10 to H1=1 / 3H. The reinforcing side plate 22 is provided at the bottom of the liquid-cooled side plate 12 and extends to the flange 3125 of the bottom insulating film of the battery module 31 (described in detail below), thereby avoiding wasted cooling efficiency, reducing overall weight, and improving overall strength.

[0081] Simulation experiments show that, under the same structure and operating conditions, if only the liquid-cooled base plate 12 is installed, the highest operating temperature of the battery cell 312 is at its top, reaching 47.2℃, while the lowest temperature is at its bottom, at 36.1℃. However, with the design of this application, which includes both the liquid-cooled base plate 12 and the liquid-cooled side plate 21, where the size of the liquid-cooled side plate 12 is H1 = 1 / 3H, the highest operating temperature of the battery cell 312 remains at its top, but it is reduced to 41℃, while the lowest temperature is at its bottom, at 32.4℃. This significant temperature improvement can increase heat exchange capacity by approximately 15%, greatly alleviating the problem of uneven temperature distribution in the battery cell 312.

[0082] Please refer to it again. Figure 5 and Figure 6 In some embodiments, the battery 100 includes multiple partition beams 40, all of which are spaced apart along the length X of the housing 10, dividing the placement space 23 into multiple sub-placement spaces 231. Each battery unit 30 has multiple battery modules 31, each corresponding to a sub-placement space 231, and the battery module 31 is located within its corresponding sub-placement space 231. The side panel assembly 20 has multiple reinforcing side panels 22, each corresponding to a sub-placement space 231 formed on each side of the side panel assembly 20. The reinforcing side panel 22 is located between the two partition beams 40 that define its corresponding sub-placement space 231. Multiple clearance grooves 41 are provided on the partition beams 40, each corresponding to a liquid-cooled side panel 21 of each side panel assembly 20. The liquid-cooled side panel 21 passes through the clearance grooves 41 on the partition beams 40 corresponding to the liquid-cooled side panel 21.

[0083] The partition beam 40 extends along the width direction Y of the box body 10, and the partition beam 40 can be a crossbeam.

[0084] By setting up the partition beams 40, all the partition beams 40 can cooperate to divide each placement space 23 into multiple sub-placement spaces 231, so that multiple battery modules 31 in the battery unit 30 can be installed one by one in the multiple sub-placement spaces 231, so as to facilitate the one-to-one positioning and installation of multiple battery modules 31 in the battery unit 30 and reduce the risk of shaking after the battery modules 31 are installed.

[0085] Multiple clearance slots 41 are provided on the partition beam 40, and each side plate assembly 20 corresponds one-to-one with all clearance slots 41 on the partition beam 40. The liquid-cooled side plate 21 in the side plate assembly 20 passes through the corresponding clearance slot 41 on each partition beam 40. In this embodiment, the liquid-cooled side plate 21 is integral, and all heat exchange sides 311 of all battery modules 31 in the battery unit 30 located on the same side are cooled by the same liquid-cooled side plate 21. This design can reduce the structural design of the liquid-cooled side plate 21, and can arrange the inlet and outlet connectors 211 for entering and exiting coolant on the liquid-cooled side plate 21 at one end or opposite ends of the housing 10 along its length direction X, so as to reduce the space occupation of the inlet and outlet connectors 211 in the middle area of ​​the housing 10, and improve the space utilization and energy density of the battery 100.

[0086] The side panel assembly 20 comprises multiple reinforcing side panels 22, which are positioned between two partition beams 40 that define their corresponding sub-placement spaces 231. On one hand, the reinforcing side panels 22 within the same side panel assembly 20 do not interfere with each other, facilitating the insertion of the battery module 31 into the enclosure. On the other hand, there is no need to design groove structures on the partition beams 40 to avoid the reinforcing side panels 22, which helps maintain the mechanical strength of the partition beams 40 to meet the modal and structural strength requirements of the battery 100.

[0087] In some embodiments, there are at least three partition beams 40. The first partition beam 40 is defined as the first partition beam 40a, the last partition beam 40 is defined as the last partition beam 40c, and the partition beam 40 located between the first partition beam 40a and the last partition beam 40c is defined as the middle partition beam 40b. The liquid-cooled side plate 21 includes a side plate body 212, an inlet / outlet connector 211, and a flow channel reversing connector 213. The side plate body 212 is provided with a liquid-cooled flow channel for the flow of coolant. The inlet / outlet connector 211 and the flow channel reversing connector 213 are respectively sleeved on opposite ends of the side plate body 212. The inlet / outlet connector 211 passes through the clearance groove 41 of the first partition beam 40a, the side plate body 212 passes through the clearance groove 41 of the middle partition beam 40b, and the flow channel reversing connector 213 passes through the clearance groove 41 of the last partition beam 40c.

[0088] The inlet / outlet connector 211 is used for the inlet and outlet of coolant. The flow channel reversing connector 213 is sleeved on the end of the side plate body 212 away from the inlet / outlet connector 211 to form a reversal of the liquid cooling flow channel in the side plate body 212, so that the coolant flowing in from the inlet / outlet connector 211 can flow in a meandering manner in the side plate body 212 before flowing out from the inlet / outlet connector 211.

[0089] The way in which the inlet / outlet connector 211, the side plate body 212, and the flow channel reversing connector 213 cooperate to form a flow path for coolant circulation is a conventional technical means in this field, and therefore will not be described in detail here.

[0090] The inlet / outlet connector 211 passes through the clearance groove 41 of the first partition beam 40a, the side plate body 212 passes through the clearance groove 41 of the middle partition beam 40b, and the flow channel reversing connector 213 passes through the clearance groove 41 of the last partition beam 40c. Therefore, the liquid-cooled side plate 21 cooperates with all the partition beams 40 to limit the position of the liquid-cooled side plate 21, thereby improving the stability of the installation of the liquid-cooled side plate 21. At the same time, the overall structural strength can be improved through the cooperation between the liquid-cooled side plate 21 and the partition beams 40.

[0091] Please see Figure 5 , Figures 9 to 11In some embodiments, a buffer element 50 is provided between at least one of the inlet / outlet connector 211 and the flow channel reversing connector 213 and the sidewall of the clearance groove 41 through which it passes. Preferably, a buffer element 50 is provided between the inlet / outlet connector 211 and the sidewall of the clearance groove 41 through which it passes, and between the flow channel reversing connector 213 and the sidewall of the clearance groove 41 through which it passes.

[0092] The buffer 50 located between the inlet / outlet connector 211 and the side wall of the clearance groove 41 can be pre-installed on the outside of the inlet / outlet connector 211. After the liquid-cooled side plate 21 is installed, the buffer 50 immediately fills the space between the inlet / outlet connector 211 and the side wall of the clearance groove 41. Similarly, the buffer 50 located between the flow channel reversing connector 213 and the side wall of the clearance groove 41 can be pre-installed on the outside of the flow channel reversing connector 213. After the liquid-cooled side plate 21 is installed, the buffer 50 immediately fills the space between the flow channel reversing connector 213 and the side wall of the clearance groove 41.

[0093] For example, the cushioning element 50 can be made of materials that meet specific needs, such as melamine, Xinjiang cotton (UR cotton), polyurethane foam (PU cotton), silicone foam, etc.

[0094] The buffer 50 prevents direct contact and collision between the inlet / outlet connector 211 and / or the flow channel reversing connector 213 and the clearance groove 41, reducing the risk of cracks in the inlet / outlet connector 211 and / or the flow channel reversing connector 213, and helping to extend the service life of the inlet / outlet connector 211 and / or the flow channel reversing connector 213.

[0095] In some embodiments, at least one of the inlet / outlet connector 211 and the flow channel reversing connector 213 is filled with structural adhesive (such as...) between itself and the bottom wall of the clearance groove 41 through which it passes. Figure 10 (As indicated by the middle arrow E). Structural adhesive fills the gap between the inlet / outlet connector 211 and the bottom wall of the through-hole relief groove 41, and / or the gap between the flow channel reversing connector 213 and the bottom wall of the through-hole relief groove 41, facilitating the bonding of the inlet / outlet connector 211 and / or the flow channel reversing connector 213 to the partition beam 40, thus allowing the liquid-cooled side plate 21 to be fixed to the partition beam 40. Combining the method of fixing the liquid-cooled side plate 21 to the battery module 31 with thermally conductive structural adhesive, a simple, effective, and low-cost method is used to achieve dual fixation of the liquid-cooled side plate 21.

[0096] Please see Figures 5 to 8 ,as well as Figure 12 In some embodiments, a limiting member 60 is provided in the clearance groove 41 on the intermediate partition beam 40b, and a limiting notch 61 is provided on the limiting member 60. The liquid-cooled side plate 21 passes through the limiting notch 61 on the limiting member 60 and is locked with the limiting notch 61.

[0097] The liquid-cooled side plate 21 passes through the limiting notch 61 on the limiting member 60 and is engaged with the limiting notch 61 to install and limit the liquid-cooled side plate 21, thereby improving the stability and reliability of the installation of the liquid-cooled side plate 21, so that the liquid-cooled side plate 21 can always be in contact with the top area of ​​the heat exchange side 311 and achieve heat exchange.

[0098] For example, the clearance groove 41 on the intermediate partition beam 40b is a "cross-shaped groove" and includes a first sub-groove 411 and a second sub-groove 412 arranged vertically. The first sub-groove 411 extends along the extension direction of the intermediate partition beam 40b (i.e., the width direction Y of the box body 10), and the second sub-groove 412 penetrates the intermediate partition beam 40b along the thickness direction of the intermediate partition beam 40b (i.e., the length direction X of the box body 10). The limiting member 60 is limited in the first sub-groove 411, and the limiting notch 61 on the limiting member 60 is located in the second sub-groove 412.

[0099] Specifically, refer to Figure 8 and Figure 12 The limiting member 60 is located in the first sub-groove 411 along the width direction Y of the housing 10 to limit its displacement along the length direction X and the width direction Y of the housing 10. The limiting notch 61 passes through the limiting member 60 along the length direction X of the housing and is correspondingly set with the second sub-groove 412, so as to facilitate the liquid cooling side plate 21 to pass through. At the same time, the limiting notch 61 clamps and limits the liquid cooling side plate 21 along the width direction Y of the housing, improving the reliability of the liquid cooling side plate 21.

[0100] For example, the limiting member 60 can be a heat-insulating element or a non-heat-insulating element. When the limiting member 60 is a heat-insulating element, thermal isolation can be achieved between the liquid-cooled side plate 21 and the intermediate partition beam 40b to prevent heat from being transferred between the intermediate partition beam 40b and the liquid-cooled side plate 21 and affecting the heat exchange efficiency of the liquid-cooled side plate 21 to the battery module 31. When the limiting member 60 is a non-heat-insulating element, the materials are readily available and simple to obtain.

[0101] In some embodiments, the limiting notch 61 is formed at the top of the limiting member 60, extends along the height direction Z of the housing from the top of the limiting member 60, and is a predetermined distance from the bottom of the limiting member 60. Thus, the limiting notch 61 does not penetrate the limiting member 60, allowing for snap-fitting of three sides of the liquid-cooled side plate 21, improving snap-fit ​​reliability. Simultaneously, the limiting member 60 located at the bottom of the limiting notch 61 increases the heat insulation effect between the liquid-cooled side plate 21 and the intermediate partition beam 40b. Furthermore, a heat insulation pad is provided between the limiting member 60 and the bottom wall of the clearance groove 41 it is located in, to further enhance the heat insulation effect between the liquid-cooled side plate 21 and the intermediate partition beam 40b, improving the heat exchange efficiency of the liquid-cooled side plate 21 to the battery module 31.

[0102] Please refer to it again. Figures 5 to 8In some embodiments, at least one side of the liquid-cooled side plate 21 arranged along the width direction Y of the housing 10, and / or at least one side of the reinforcing side plate 22 arranged along the width direction Y of the housing 10, are provided with adhesive limiting components 70. The adhesive limiting components 70 include a first adhesive limiting element 71 and a second adhesive limiting element 72. The first adhesive limiting element 71 and the second adhesive limiting element 72 in the adhesive limiting components 70 are spaced apart along the height direction Z of the housing 10 at the top and bottom of the liquid-cooled side plate 21 and / or the reinforcing side plate 22, and define an adhesive-containing space 73 for accommodating structural adhesive.

[0103] Preferably, each side of the liquid-cooled side panel 21 arranged along the width direction Y of the housing 10 and each side of the reinforcing side panel 22 arranged along the width direction Y of the housing 10 are provided with adhesive limiting components 70. The adhesive limiting components 70 provided on each side of the liquid-cooled side panel 21 are defined as the first adhesive limiting components, and the adhesive limiting components 70 provided on each side of the reinforcing side panel 22 are defined as the second adhesive limiting components. The first adhesive limiting element 71 and the second adhesive limiting element 72 of the first adhesive limiting component are spaced apart along the height direction Z of the housing 10 at the opposite top and bottom of the liquid-cooled side panel 21, and the first adhesive limiting element 71 and the second adhesive limiting element 72 of the second adhesive limiting component are spaced apart along the height direction Z of the housing 10 at the opposite top and bottom of the reinforcing side panel 22.

[0104] The thickness of the first adhesive limiting component 71 and the second adhesive limiting component 72 determines the thickness of the adhesive application. The thickness of the first adhesive limiting component 71 and the second adhesive limiting component 72 refers to their dimensions in the width direction Y of the housing 10.

[0105] Typically, the adhesive-containing space 73 defined by the first adhesive-limiting element 71 and the second adhesive-limiting element 72 in the first adhesive-limiting assembly is filled with thermally conductive structural adhesive for thermally connecting the liquid-cooled side plate 21 and the top region of its heat exchange side surface 311. The adhesive-containing space 73 defined by the first adhesive-limiting element 71 and the second adhesive-limiting element 72 in the second adhesive-limiting assembly is filled with thermally conductive structural adhesive or thermally insulating structural adhesive for bonding the reinforcing side plate 22 and the non-top region of its heat exchange side surface 311.

[0106] By setting the adhesive limiting component 70, it is convenient to apply the adhesive layer within the adhesive space 73 defined by the adhesive limiting component 70, and the thickness and application area of ​​the adhesive layer can also be controlled.

[0107] In some embodiments, the reinforcing side plate 22 and the liquid-cooled side plate 21 of the side plate assembly 20 are either integrally formed or separately formed. When the reinforcing side plate 22 and the liquid-cooled side plate 21 of the side plate assembly 20 are integrally formed, this design reduces the operation of assembling the reinforcing side plate 22 and the liquid-cooled side plate 21, which is beneficial to improving the assembly efficiency of the battery 100. When the reinforcing side plate 22 and the liquid-cooled side plate 21 of the side plate assembly 20 are separately formed, different materials can be selected to form the reinforcing side plate 22 and the liquid-cooled side plate 21 according to different needs. For example, from a cost perspective, the liquid-cooled side plate 21 is made of a metal material with good thermal conductivity, while the reinforcing side plate 22 is made of a non-metallic material with low cost and low thermal conductivity.

[0108] In some embodiments, a liquid cooling channel is provided within the liquid-cooled side plate 21, and the reinforcing side plate 22 is a solid structure. This design can meet the cooling function requirements of the liquid-cooled side plate 21, and also ensure that the reinforcing side plate 22 has good mechanical strength, meeting the modal requirements and structural strength requirements of the battery 100.

[0109] Please see Figure 5 In some embodiments, a liquid cooling channel is provided in the liquid-cooled side plate 21, and a hollow channel for weight reduction is provided in the reinforced side plate 22, thereby achieving the purpose of weight reduction and improving the energy density of the battery 100.

[0110] Please see Figure 8 and Figure 9 In some embodiments, the reinforcing side plate 22 extends along the height Z direction of the housing 10 from the liquid-cooled side plate 21 to the bottom surface of the battery module 31. In other embodiments, please refer to [link to relevant documentation]. Figure 3 , Figure 4 , Figure 6 , Figure 13 and Figure 14 The reinforcing side plate 22 extends along the height Z direction of the housing 10 from the liquid-cooled side plate 21 to the flange 3125 of the bottom insulating film of the battery module 31 (e.g., Figure 4 (The position indicated by the middle arrow K).

[0111] The reinforcing side plate 22 extends from the liquid-cooled side plate 21 along the height Z direction of the housing 10 to the bottom surface of the battery module 31, meaning the bottom surface of the reinforcing side plate 22 is flush with the bottom surface of the battery module 31. This design can omit or simplify the fixing method of the reinforcing side plate 22. For example, the second adhesive limiting assembly can be omitted, and the reinforcing side plate 22 can be directly fixed to the liquid-cooled base plate 12 to save costs and further improve the overall structural strength. Of course, the second adhesive limiting assembly can also be retained to improve the overall structural mode. It is understood that the bottom surface of the battery module 31 is defined by the bottom surfaces of all the battery cells 312 within the battery module 31.

[0112] When the reinforcing side plate 22 extends along the height Z direction of the housing 10 from the liquid-cooled side plate 21 to the flange 3125 of the bottom insulating film of the battery module 31, the reinforcing side plate 22 does not reach the bottom and does not extend to the bottom surface of the battery module 31. To protect the battery cell 312, an insulating film is wrapped around the outside of the battery cell, and the insulating film has a flange 3125 protruding from the narrow face of the battery cell 312 with a certain thickness at the bottom. The method of forming the flange 3125 is a conventional technical means in this field, so it will not be described in detail here.

[0113] The reinforcing side plate 22 extends along the height Z of the housing 10 from the liquid-cooled side plate 21 to the flange 3125 of the insulating film at the bottom of the battery module 31, that is, the top surface of the flange 3125 of the insulating film at the bottom of the battery module 31 along the height Z of the housing 10. The thickness of the flange 3125 protruding from the narrow surface of different battery cells 312 may vary (understandably, the flange 3125 protrudes from the narrow surface along the width Y of the housing 10), resulting in different gap sizes between the bottoms of two adjacent battery modules 31 in adjacent battery cells 30 in the width Y direction of the housing 10. If the gap size is small, it will increase the difficulty of installing the reinforcing side plate 22; if the gap size is too large, it will result in the reinforcing side plate 22 being too loose when installed. Inconsistent gap sizes can also easily cause the reinforcing side plate 22 to become misaligned during installation. Therefore, by designing the reinforcing side plate 22 to extend along the height Z direction of the housing 10 from the liquid-cooled side plate 21 to the flange 3125 of the insulating film at the bottom of the battery module 31, the aforementioned problems can be avoided. The reinforcing side plate 22 is easy to install and can be filled between two adjacent battery cells 30 with appropriate force, avoiding excessive compression of the battery cells 30 and resulting in shaking. At the same time, it can also save some reinforcing side plates 22, reducing weight and cost.

[0114] The flanged edge of the insulating film on the outside of the battery cell 312 refers to the portion of the insulating film of the battery cell 312 that extends beyond the edge of the battery cell 312's outer casing during the battery cell 312 encapsulation process. This portion is folded and fixed to the narrow side of the battery cell 312 during encapsulation, forming an additional protective layer and enhancing the safety and reliability of the battery cell 312. This application also provides an electrical device comprising a battery 100 as described in any of the above embodiments, the battery 100 being used to provide electrical energy to the electrical device. The electrical device in this application has the effects of any of the above embodiments, and therefore will not be described again here.

[0115] The aforementioned electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, power tools, energy storage devices, amusement equipment, elevators, 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, containerized energy storage, etc.; amusement equipment can be carousels, drop towers, etc. This application does not impose special restrictions on the aforementioned electrical equipment.

[0116] The aforementioned battery 100 and electrical device, along with the liquid-cooled side plate 21 and reinforcing side plate 22, allow for double-sided cooling of the battery module 31. The liquid-cooled side plate 21 cools the hotter top area of ​​the battery module 31, mitigating the problem of excessively rapid temperature rise in this area and preventing overheating and uneven temperature distribution. The reinforcing side plate 22 supports and maintains the position of the liquid-cooled side plate 21, allowing it to fully utilize its cooling function. Furthermore, the reinforcing side plate 22 provides both thermal conductivity and insulation. Thermal conductivity increases the heat transfer path in non-top areas, while thermal insulation reduces the risk of heat diffusion and minimizes the temperature difference between individual battery cells 312. The combined effect of the liquid-cooled side plate 21 and reinforcing side plate 22 improves heat exchange efficiency, ensuring better charge and discharge performance of the individual battery cells 312, extending their lifespan, and enhancing the structural strength and overall reliability of the battery.

[0117] 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.

[0118] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery, characterized by, The battery comprises: a box body (10); a plurality of side plate groups (20) arranged in the box body (10) and spaced apart along the width direction (Y) of the box body (10), each adjacent two side plate groups (20) defining a placement space (23) therebetween, the side plate group (20) comprising a liquid cooling side plate (21) and a reinforcing side plate (22), the reinforcing side plate (22) being supported on the bottom side of the liquid cooling side plate (21) along the height direction (Z) of the box body (10); a battery cell (30) corresponding to the placement space (23), the battery cell (30) being arranged in the corresponding placement space (23), the battery cell (30) comprising a battery module (31), the battery module (31) having a pole (3124) and a heat exchange side (311) facing the side plate group (20), the heat exchange side (311) comprising a top region and a non-top region, the pole (3124) protruding from the top region along the height direction (Z) of the box body (10); wherein the liquid cooling side plate (21) is in thermal connection with the top region of the heat exchange side (311) arranged thereon, and the reinforcing side plate (22) is connected with the non-top region of the heat exchange side (311) arranged thereon.

2. The battery of claim 1, wherein, The battery module (31) comprises a plurality of battery monomers (312), the battery monomers (312) extend along the height direction (Z) of the box body (10) and have a first side (3122) and a second side (3123) arranged adjacent to each other, the area of the first side (3122) is greater than that of the second side (3123), the first sides (3122) of each adjacent two battery monomers (312) in the battery module (31) are arranged opposite to each other, and the second sides (3123) of all the battery monomers (312) on the same side of the battery module (31) jointly form the heat exchange side (311) of the battery module (31) on the side.

3. The battery of claim 1, wherein, The heat exchange side (311) has a dimension H in the height direction (Z) of the box body (10), the liquid cooling side plate (21) has a dimension H1 in the height direction (Z) of the box body (10), and H / 3≤H1≤H / 2; and / or the box body (10) comprises a liquid cooling bottom plate.

4. The battery of claim 3, wherein, The reinforcing side plate (22) extends from the liquid cooling side plate (21) to the folded edge (3125) of the insulating film at the bottom of the battery module (31) along the height direction (Z) of the box body (10).

5. The battery of claim 1, wherein, The battery comprises a plurality of partition beams (40) arranged spaced apart along the length direction (X) of the box body (10) and separating the placement spaces (23) into a plurality of sub-placement spaces (231), the battery module (31) of the battery cell (30) corresponds to the sub-placement space (231) and is arranged in the corresponding sub-placement space (231). The reinforcing side plates (22) of the side plate group (20) are in one-to-one correspondence with the sub-placement spaces (231) formed on each side of the side plate group (20), and are located between the two partition beams (40) defining the corresponding sub-placement space (231); The partition beam (40) is provided with a plurality of avoiding grooves (41), and all the avoiding grooves (41) on the partition beam (40) are in one-to-one correspondence with the liquid-cooled side plates (21) of all the side plate groups (20), and the liquid-cooled side plates (21) are arranged in the avoiding grooves (41) on the partition beam (40) corresponding to the liquid-cooled side plates (21).

6. The battery of claim 5, wherein, The partition beam (40) is at least three, the first partition beam (40a) is defined as the first partition beam (40a), the last partition beam (40c) is defined as the last partition beam (40c), and the partition beam (40) between the first partition beam (40a) and the last partition beam (40c) is defined as the middle partition beam (40b). The liquid-cooled side plate (21) comprises a side plate body (212), an inlet and outlet liquid connector (211) and a flow channel reversing connector (213), the side plate body (212) is provided with a liquid-cooled flow channel for circulating cooling liquid, the inlet and outlet liquid connector (211) and the flow channel reversing connector (213) are respectively arranged at opposite ends of the side plate body (212), the inlet and outlet liquid connector (211) is arranged in the avoiding groove (41) of the first partition beam (40a), the side plate body (212) is arranged in the avoiding groove (41) of the middle partition beam (40b), and the flow channel reversing connector (213) is arranged in the avoiding groove (41) of the last partition beam (40c).

7. The battery of claim 6, wherein, At least one of the inlet and outlet liquid connector (211) and the flow channel reversing connector (213) and the groove side wall of the avoiding groove (41) in which it is arranged are provided with a buffer (50); And / or, at least one of the inlet and outlet liquid connector (211) and the flow channel reversing connector (213) and the groove bottom wall of the avoiding groove (41) in which it is arranged are filled with structural glue.

8. The battery of claim 6, wherein, The avoiding groove (41) on the middle partition beam (40b) is provided with a limiting piece (60), the limiting piece (60) is provided with a limiting notch (61), the liquid-cooled side plate (21) is arranged in the limiting notch (61) of the limiting piece (60) and is clamped with the limiting notch (61); The limiting piece (60) is a heat insulation element or a non-heat insulation element; and / or, the limiting piece (60) and the groove bottom wall of the avoiding groove (41) in which it is arranged are provided with a heat insulation pad.

9. The battery of claim 1, wherein, At least one side of the liquid cooling side plate (21) arranged along the width direction (Y) of the box body (10) and / or at least one side of the reinforcing side plate (22) arranged along the width direction (Y) of the box body (10) is provided with a glue limiting assembly (70), the glue limiting assembly (70) comprises a first glue limiting piece (71) and a second glue limiting piece (72), the first glue limiting piece (71) and the second glue limiting piece (72) in the glue limiting assembly (70) are arranged at the top and the bottom of the liquid cooling side plate (21) and / or the reinforcing side plate (22) opposite to each other along the height direction (Z) of the box body (10) and define a glue containing space (73) for containing structural glue.

10. The battery of claim 1, wherein, The reinforcing side plate (22) and the liquid cooling side plate (21) of the side plate group (20) are integrally arranged or separately arranged; And / or, a hollow flow channel for weight reduction is arranged in the reinforcing side plate (22); And / or, the reinforcing side plate (22) is one of an epoxy plate and a polycarbonate plate; And / or, the reinforcing side plate (22) extends from the liquid cooling side plate (21) to the bottom surface of the battery module (31) along the height direction (Z) of the box body (10).

11. An electrical device, characterized by The battery comprises the battery as claimed in any one of claims 1 to 10, and is used for providing electric energy for the electric device.

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