Battery and electric device

Abstract

The invention provides a battery and an electric device. The battery comprises a box body, a battery cell module, a supporting structure and a first adhesive layer, wherein an opening is formed in one end of the box body, and a containing cavity communicated with the opening is formed in the box body; the battery cell module is arranged in the accommodating cavity; the supporting structure is arranged in the containing cavity and located between the battery cell module and the box body, the supporting structure surrounds the periphery of the battery cell module, and a containing groove with a groove opening facing the opening is defined by the supporting structure, the battery cell module and the box body; and the first adhesive layer is filled in the accommodating groove. The box body and the battery cell module can be connected together through the first adhesive layer, so that the mechanical strength of the battery is improved; and the quality uniformity of the first adhesive layer is relatively good, so that the stability and the strength of combination between the box body and the battery cell module can be improved, and the mechanical shock resistance of the battery is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] Electrical devices, such as cars, may vibrate and bump during operation, causing mechanical shock to the batteries on the devices. To improve the battery's resistance to mechanical shock, glue needs to be injected into the battery casing to strengthen the bond between the battery cells and the casing. However, different glues have different fluidity. When the glue has poor fluidity, it is difficult for the glue to fully fill the casing, making it difficult to improve the bond strength between the battery cells and the casing, and thus the battery's resistance to mechanical shock. Summary of the Invention

[0003] The embodiments of the present application provide a battery and an electrical device that can solve the technical problem that the performance of the battery in resisting mechanical impact is difficult to effectively improve.

[0004] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0005] A box body, having an opening at one end and an accommodating cavity in communication with the opening;

[0006] A battery cell module is arranged in the accommodating cavity;

[0007] a support structure disposed in the accommodating cavity and located between the battery cell module and the box body, the support structure surrounding the outer periphery of the battery cell module, the support structure, the battery cell module and the box body defining an accommodating groove, the notch of the accommodating groove facing the opening;

[0008] The first adhesive layer is filled in the receiving groove.

[0009] In one embodiment, the support structure comprises at least an elastic layer.

[0010] In one embodiment, the support structure is clamped between the battery cell module and the box, and the elastic layer is interference-fitted with the battery cell module and the box.

[0011] In one embodiment, the elastic layer includes at least one of a foam layer and a rubber layer.

[0012] In one embodiment, the support structure is fixedly disposed on the outer circumference of the battery cell module.

[0013] In one embodiment, the support structure includes a rigid cable tie, and the rigid cable tie is used to bind the battery cell module.

[0014] In one embodiment, the support structure further includes an elastic layer disposed on a surface of the rigid cable tie, and the elastic layer is configured to be interference-fitted with at least one of the battery cell module and the box.

[0015] In one embodiment, the support structure is disposed at a position close to the opening, and the distance between the support structure and the bottom of the accommodating cavity is greater than the distance between the support structure and the opening.

[0016] In one embodiment, the depth of the receiving groove is 8 mm to 10 mm.

[0017] In one embodiment, the width of the receiving groove is 10 mm to 12 mm.

[0018] In one embodiment, the bottom width of the accommodating groove is 3 mm to 4 mm.

[0019] In one embodiment, the width of the receiving groove increases in a first direction, and the first direction is a direction from the bottom of the receiving groove to the groove opening.

[0020] In one embodiment, the inner surface of the box body includes a first surface, the first surface is formed as an inner wall surface of the accommodating groove, and the first surface extends obliquely in the first direction away from the battery cell module.

[0021] In one embodiment, the angle between the first surface and the first direction is 30° to 45°.

[0022] In one embodiment, the inner surface of the box body also includes a second surface, which is located on the side of the first surface away from the opening and is connected to the first surface. The second surface extends along the first direction, and the support structure is at least partially clamped between the second surface and the battery cell module.

[0023] In one embodiment, the battery cell module includes a plurality of battery cells stacked face to face in sequence, and a distance between two adjacent battery cells is less than or equal to 1 mm.

[0024] In one embodiment, the distance between two adjacent battery cells is greater than or equal to 0.1 mm.

[0025] In one embodiment, the battery cell module further includes a spacer, and the spacer is clamped between two adjacent battery cells.

[0026] In one embodiment, the first adhesive layer includes a main body and an extension portion, the main body is located in the receiving groove, and the extension portion extends out of the receiving groove and extends into the gap between two adjacent battery cells.

[0027] In one embodiment, the battery further includes a second adhesive layer, which is disposed in the accommodating cavity and located at the bottom of the box body, and the battery cell module is disposed on and connected to the second adhesive layer.

[0028] In one embodiment, both the first adhesive layer and the second adhesive layer are structural adhesive layers.

[0029] In one embodiment, the battery further includes a battery management system module, and the battery management system module is connected to the battery cell module.

[0030] In one embodiment, the battery further includes an integrated busbar, and the battery management system module is connected to the battery cell module via the integrated busbar.

[0031] In one embodiment, the battery further includes a cover, which is disposed on the box to close the opening, and the integrated busbar and the battery management system module are both disposed on the cover.

[0032] In one embodiment, the battery is a battery pack.

[0033] In one embodiment, the battery pack is a low-voltage battery pack, and the output voltage of the low-voltage battery pack is less than or equal to 48V.

[0034] In one embodiment, the low-voltage battery pack is a starting battery pack.

[0035] In a second aspect, an embodiment of the present application provides an electrical device comprising the above-mentioned battery.

[0036] Beneficial effects of the embodiments of the present application:

[0037] The battery provided by the embodiment of the present application is provided with a support structure surrounding the periphery of the battery cell module in the housing cavity of the housing, so that the support structure is located between the housing and the battery cell module, and the support structure, the housing and the battery cell module are used to define a housing groove, and then glue can be filled into the housing groove through the opening of the housing. After the glue is cured, a first glue layer located in the housing groove can be obtained. The first glue layer can connect the housing and the battery cell module together, thereby improving the mechanical strength of the battery. Furthermore, compared with the depth of the housing cavity, the depth of the housing groove is smaller. In this way, compared with the method of filling glue in the housing cavity, the flow path of the glue is shorter when filling the housing groove with glue. Even if the fluidity of the glue is poor, the filling fullness of the glue in the housing groove can be improved to a certain extent, reducing the probability of pores, depressions, delamination and other defects in the first glue layer, improving the quality uniformity of the first glue layer, and then improving the stability and strength of the combination between the housing and the battery cell module, thereby effectively improving the performance of the battery in resisting mechanical impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 is a schematic diagram of the three-dimensional structure of a battery provided in an embodiment of the present application;

[0040] Figure 2 is a schematic top view of a battery provided in an embodiment of the present application;

[0041] Figure 3 yes Figure 2 Cross-sectional view along the AA axis;

[0042] Figure 4 yes Figure 3 Enlarged view of part C;

[0043] Figure 5 yes Figure 2 Cross-sectional view along the BB direction;

[0044] Figure 6 yes Figure 5 Enlarged view of part D in the middle;

[0045] Figure 7 is a schematic diagram of the main structure of a battery provided in an embodiment of the present application;

[0046] Figure 8 yes Figure 7 Cross-sectional view along the EE direction;

[0047] Figure 9 yes Figure 8 Enlarged view of part F;

[0048] Figure 10 is a schematic cross-sectional structural diagram of another battery provided in an embodiment of the present application;

[0049] Figure 11 yes Figure 10 Schematic diagram of the cross-sectional structure of the middle battery after omitting the first adhesive layer, cover, battery management system module and integrated busbar;

[0050] Figure 12 is a schematic cross-sectional view of a support structure provided in an embodiment of the present application;

[0051] Figure 13 is a schematic cross-sectional view of another supporting structure provided by an embodiment of the present application;

[0052] Figure 14 It is a structural diagram of an electrical device provided in an embodiment of the present application. Description of the drawings:

[0054] 100. Battery;

[0055] 110, housing; 111, opening; 112, accommodating cavity; 113, inner surface; 1131, first surface; 1132, second surface;

[0056] 120. Battery module; 121. Battery cell; 122. Isolator;

[0057] 130. Support structure; 131. Elastic layer; 132. Rigid tie;

[0058] 140, receiving tank;

[0059] 150. First adhesive layer; 151. Main body; 152. Extension portion;

[0060] 160, second adhesive layer;

[0061] 170. Battery management system module;

[0062] 180, integrated busbar;

[0063] 190, cover;

[0064] 200. Electrical equipment. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0066] Furthermore, it should be understood that the specific embodiments described herein are intended only to illustrate and explain the present application and are not intended to limit the present application. In this application, unless otherwise indicated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the directions of the drawings in the accompanying drawings; whereas "inner" and "outer" refer to the outline of the device.

[0067] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the specified features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0069] The terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0070] In the description of the embodiments of this application, words such as "example" or "for example" are used to indicate an example, illustration, or description. Any embodiment or design described as "for example" or "for example" in the embodiments of this application is not to be construed as being preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to clearly present relative concepts.

[0071] To facilitate understanding of the solution of the present application, the spline curves and arrows used in the drawings are explained here: the components indicated by the spline curves without arrows are solid components, that is, components with solid structures; the components indicated by the spline curves with arrows are virtual components, that is, components without solid structures.

[0072] First, see Figures 1 to 11, an embodiment of the present application provides a battery 100. The battery 100 includes a case 110, a cell module 120, a support structure 130 and a first adhesive layer 150. One end of the case 110 is provided with an opening 111 and the interior of the case 110 is provided with a accommodating cavity 112, which is connected to the opening 111. The cell module 120 is arranged in the accommodating cavity 112. The support structure 130 is also arranged in the accommodating cavity 112, and the support structure 130 is located between the cell module 120 and the case 110. The support structure 130 surrounds the outer periphery of the cell module 120, and the support structure 130, the cell module 120 and the case 110 define an accommodating groove 140; the notch of the accommodating groove 140 faces the opening 111. The first adhesive layer 150 is filled in the accommodating groove 140.

[0073] The battery 100 refers to a device that can convert chemical energy into electrical energy. The battery 100 can have different forms. For example, the battery 100 can be a battery pack.

[0074] The box body 110 in the battery 100 is used as a container to load the battery cell module 120 to protect the battery cell module 120. The box body 110 can have different shapes, including but not limited to one of a cube, a rectangular parallelepiped and a cylinder. The material of the box body 110 includes but is not limited to at least one of metal and plastic. The box body 110 has two opposite ends, one end of the box body 110 is provided with an opening 111, and the other end of the box body 110 can be closed or open. The box body 110 also has a accommodating cavity 112, which is connected to the opening 111, and the battery cell module 120 and the support structure 130 can be placed in the accommodating cavity 112 through the opening 111.

[0075] The battery cell module 120 refers to a unit structure including a battery cell 121. The battery cell 121 is also called a battery monomer, which is a basic unit for converting chemical energy into electrical energy. Optionally, the battery cell 121 is a rechargeable battery cell, which can realize the mutual conversion between chemical energy and electrical energy. The number of battery cells 121 in the battery cell module 120 can be one or more. When the number of battery cells 121 is one, one battery cell 121 constitutes a battery cell module 120; when the number of battery cells 121 is multiple, multiple battery cells 121 are spliced together to form a battery cell module 120.

[0076] The support structure 130 can be used to support the first adhesive layer 150. Specifically, the support structure 130 and the battery cell module 120 are arranged together in the accommodating cavity 112, and the support structure 130 surrounds the outer periphery of the battery cell module 120, so that the support structure 130 is located between the battery cell module 120 and the box body 110. The support structure 130, the battery cell module 120 and the box body 110 together define a accommodating groove 140 with a U-shaped cross-section, wherein the battery cell module 120 and the box body 110 respectively form the opposite side walls of the accommodating groove 140, and the support structure 130 forms the bottom wall of the accommodating groove 140, and the notch of the accommodating groove 140 faces upward (such as Figure 11 As shown, the notch of the receiving groove 140 faces the opening 111 of the housing 110. Glue can be filled into the receiving groove 140 through the opening 111 of the housing 110. After the glue solidifies, a first adhesive layer 150 is formed to fill the receiving groove 140. The shape of the first adhesive layer 150 is adapted to the shape of the receiving groove 140.

[0077] The support structure 130 is arranged in the accommodating cavity 112. It can be understood that the depth of the accommodating groove 140 is always less than the depth of the accommodating cavity 112. The depth of the accommodating groove 140 can be adjusted by adjusting the position of the support structure 130 in the accommodating cavity 112. Generally, the farther the support structure 130 is from the opening 111, the deeper the accommodating groove 140 is, and the closer the support structure 130 is to the opening 111, the shallower the accommodating groove 140 is. It should be noted here that the support structure 130 can be fixed on the box body 110, for example, the support structure 130 is bonded to the inner surface of the box body 110; the support structure 130 can also be fixed on the battery module 120, for example, the support structure 130 is wrapped around the outside of the battery module 120; the support structure 130 can be a separately molded component, or it can be an integrally molded component arranged on the box body 110 or the battery module 120. The support structure 130 can be a rigid structure or an elastic structure.

[0078] In summary, the battery 100 provided in the embodiment of the present application adds a support structure 130 surrounding the outer periphery of the cell module 120 within the accommodating cavity 112 of the housing 110, so that the support structure 130 is located between the housing 110 and the cell module 120. The support structure 130, the housing 110, and the cell module 120 collectively define a accommodating groove 140. Glue can then be filled into the accommodating groove 140 through the opening 111 of the housing 110. After the glue cures, a first adhesive layer 150 is formed within the accommodating groove 140. The first adhesive layer 150 connects the housing 110 and the cell module 120 together, thereby improving the mechanical strength of the battery 100. Furthermore, compared with the depth of the accommodating cavity 112, the depth of the accommodating groove 140 is smaller. In this way, compared with the method of filling glue in the accommodating cavity 112, the flow path of the glue is shorter when filling glue in the accommodating groove 140. In this way, even if the fluidity of the glue is poor, the filling fullness of the glue in the accommodating groove 140 can be improved to a certain extent, and the probability of pores, depressions, delamination and other defects in the first glue layer 150 can be reduced, and the quality uniformity of the first glue layer 150 can be improved, thereby improving the stability and strength of the connection between the box body 110 and the battery cell module 120, thereby effectively improving the performance of the battery 100 in resisting mechanical impact.

[0079] In some embodiments, the support structure 130 includes at least an elastic layer 131. That is, when the support structure 130 is subjected to force, the elastic layer 131 can change shape. Compared with a purely rigid structure, setting the support structure 130 to include an elastic layer 131 can bring multiple benefits: first, when the battery 100 is subjected to mechanical impact, the elastic layer 131 can play a buffering role, reducing the risk of damage to the battery module 120 due to a hard collision between the battery module 120 and the case 110; second, it reduces the difficulty of assembly. As an example, when assembling the battery 100, the support structure 130 and the battery module 120 are first set together and then loaded into the case 110 together. During the process of entering the box, when the support structure 130 encounters resistance, the elastic layer 131 can be appropriately deformed, thereby reducing the difficulty of entering the box. Similarly, when assembling the battery 100, if the support structure 130 and the box body 110 are first set together and then the battery cell module 120 is installed in the box body 110, the support structure 130 can also cause the elastic layer 131 to deform due to the force, thereby reducing the resistance of the battery cell module 120 entering the box.

[0080] It should be noted that the support structure 130 can be configured as a purely elastic structure; as an example, see Figure 12 , the support structure 130 includes only the elastic layer 131; the support structure 130 can also be configured as a composite structure of a rigid structure and an elastic structure; as an example, see Figure 13 , the support structure 130 includes a rigid strap 132 and an elastic layer 131 .

[0081] In some embodiments, the elastic layer 131 includes at least one of a foam layer and a rubber layer. The above material layer has a low elastic modulus, so that the elastic layer 131 has good elastic deformation ability.

[0082] In some embodiments, see Figure 4 、 Figure 6 and Figure 8 The support structure 130 is clamped between the battery cell module 120 and the housing 110, and the elastic layer 131 has an interference fit with the battery cell module 120 and the housing 110. Because the support structure 130 includes the elastic layer 131, the elastic layer 131 can deform when the support structure 130 is clamped by the battery cell module 120 and the housing 110. The elastic layer 131 has an interference fit with the battery cell module 120 and the housing 110, and the gaps between the support structure 130 and the battery cell module 120 and the housing 110 are simultaneously reduced, thereby preventing the glue filled in the receiving groove 140 from flowing out of the receiving groove 140 through these gaps. This in turn improves the glue filling effect in the receiving groove 140, thereby improving the quality of the first adhesive layer 150. In addition, the elastic layer 131 has an interference fit with the battery cell module 120 and the box body 110, which can also limit the support structure 130. During the process of filling glue in the receiving groove 140, the risk of displacement of the support structure 130 can be reduced, thereby ensuring the molding effect of the first glue layer 150.

[0083] In some embodiments, see Figure 4 、 Figure 6 and Figure 8 , the support structure 130 is fixedly arranged on the outer peripheral surface of the battery cell module 120. Compared with the support structure 130 being fixedly arranged on the inner surface 113 of the case 110, fixing the support structure 130 on the outer peripheral surface of the battery cell module 120 can reduce the difficulty of setting the support structure 130 on the one hand, and on the other hand, it can also reduce the difficulty of assembly during the assembly of the battery 100. The support structure 130 is fixedly arranged on the battery cell module 120, and the support structure 130 and the battery cell module 120 can be bonded together, or the support structure 130 and the battery cell module 120 can be interference fit. As an example, the support structure 130 is wrapped around the outer peripheral surface of the battery cell module 120. When the support structure 130 is fixedly arranged on the battery cell module 120, the support structure 130 and the case 110 can be in a connected relationship or a clearance fit.

[0084] In some embodiments, the support structure 130 is bonded to the cell module 120. That is, the support structure 130 is bonded to the outer circumference of the cell module 120. The bonding method is simple and easy to operate.

[0085] In some embodiments, see Figure 11 、 Figure 12 and Figure 13 , the support structure 130 includes a rigid cable tie 132, and the rigid cable tie 132 bundles the battery cell module 120. That is, in this case, the support structure 130 is also used as a cable tie, and the support structure 130 bundles the battery cell module 120 and is fixed to the battery cell module 120. By reusing the support structure 130 as a cable tie, the structure of the battery 100 is simplified and the cost of the battery 100 is reduced. Specifically, the support structure 130 includes a rigid cable tie 132, and the rigid cable tie 132 has a high mechanical strength, so that it can better restrain the battery cell module 120, especially in the later stage of the battery 100 cycles, as the battery cell 121 expands inside, the rigid cable tie 132 has a high mechanical strength to reduce the risk of breakage. Optionally, the rigid cable tie 132 is a metal cable tie, such as a steel cable tie. It should be noted here that the support structure 130 can be set as a purely rigid structure, for example, the support structure 130 only includes the rigid cable tie 132; the support structure 130 can also be set as a composite structure of a rigid structure and an elastic structure; as an example, see Figure 13 , the support structure 130 includes a rigid strap 132 and an elastic layer 131 .

[0086] In some embodiments, see Figure 12 The support structure 130 includes a rigid cable tie 132 and an elastic layer 131; the elastic layer 131 is disposed on the surface of the rigid cable tie 132. As an example, the elastic layer 131 completely covers the surface of the rigid cable tie 132. When the rigid cable tie 132 is used to bind the battery module 120, the elastic layer 131 and the battery module 120 form an interference fit. At the same time, the box 110 squeezes the support structure 130, and the elastic layer 131 also forms an interference fit with the battery module 120. As another example, the elastic layer 131 is located on one side of the rigid cable tie 132. When the rigid cable tie 132 is used to bind the battery module 120, the elastic layer 131 is located between the rigid cable tie 132 and the battery module 120, and the elastic layer 131 and the battery module 120 form an interference fit. As another example, the elastic layer 131 is located on one side of the rigid tie 132. When the rigid tie 132 is used to bind the cell module 120, the elastic layer 131 is located on the side of the rigid tie 132 facing away from the cell module 120. The case 110 presses against the support structure 130, and the elastic layer 131 forms an interference fit with the case 110. In other words, by adjusting the position of the elastic layer 131 on the rigid tie 132, an interference fit can be achieved between the elastic layer 131 and at least one of the cell module 120 and the case 110, thereby reducing the risk of glue flowing out of the receiving groove 140 during glue injection.

[0087] It can be seen that by making the support structure 130 include a rigid cable tie 132 and an elastic layer 131, the support structure 130 not only has higher mechanical strength and reduces the risk of breakage of the support structure 130, but also the support structure 130 can also have an interference fit with at least one of the battery module 120 and the box body 110, thereby improving the molding effect of the first adhesive layer 150.

[0088] In some embodiments, the support structure 130 is disposed near the opening 111. Specifically, the distance between the support structure 130 and the bottom of the accommodating cavity 112 is greater than the distance between the support structure 130 and the opening 111. This arrangement facilitates controlling the depth of the accommodating groove 140, preventing the accommodating groove 140 from being too deep, which would result in a decrease in the fullness of the glue in the accommodating groove 140 and thus affect the molding quality of the first adhesive layer 150.

[0089] In some embodiments, see Figure 11 The depth H of the receiving groove 140 is 8 mm to 10 mm. Generally, the depth H of the receiving groove 140 should not be too large, otherwise the glue filling in the receiving groove 140 will be reduced, reducing the molding quality of the first adhesive layer 150. However, the depth H of the receiving groove 140 should not be too small, otherwise the thickness of the first adhesive layer 150 will be too thin, reducing the strength of the connection between the battery cell module 120 and the casing 110. As examples, the depth H is 8 mm, 8.5 mm, 9 mm, 9.5 mm, or 10 mm.

[0090] In some embodiments, see Figure 11 The slot width D1 of the receiving groove 140 is 10 mm to 12 mm. Typically, a too small slot width D1 of the receiving groove 140 makes it difficult to inject glue into the receiving groove 140. Increasing the slot width D1 requires increasing the distance between the cell module 120 and the housing 110 or modifying the housing 110 structure, which can increase the design difficulty and production cost of the battery 100. For example, the slot width D1 of the receiving groove 140 is 10 mm, 10.5 mm, 11 mm, 11.5 mm, or 12 mm.

[0091] In some embodiments, see Figure 11, the bottom width D2 of the receiving groove 140 is 3mm to 4mm. Usually, if the bottom width D2 of the receiving groove 140 is too small, it is not conducive to glue filling, especially when the gap of the bottom wall of the receiving groove 140 is sealed. During the glue injection process, the gas cannot be effectively discharged, resulting in no effective contact between the first glue layer 150 and the bottom wall of the receiving groove 140, thereby affecting the bonding strength between the large battery module 120 and the case 110; then, increasing the bottom width D2 of the receiving groove 140 requires increasing the distance between the battery module 120 and the case 110, which in turn affects the matching effect between the battery module 120 and the case 110, and is even more detrimental to improving the overall mechanical strength of the battery 10. As an example, the notch width D1 of the receiving groove 140 is 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm or 4mm.

[0092] In some embodiments, see Figure 4 、 Figure 6 and Figure 11 In a first direction, the width of the receiving groove 140 increases, and the first direction is from the bottom of the receiving groove 140 to the groove opening. In other words, the receiving groove 140 has a "wide mouth and narrow bottom" design. The advantage of this arrangement is that the groove opening width D1 of the receiving groove 140 can be increased without simultaneously increasing the groove bottom width D2 of the receiving groove 140, so that the groove bottom width D2 of the receiving groove 140 can be maintained within a relatively small range. By increasing the groove opening width D1 of the receiving groove 140, the glue can be promoted to flow into the receiving groove 140, and keeping the groove bottom width D2 of the receiving groove 140 within a relatively small range means that the distance between the battery cell module 120 and the case 110 is also relatively small, so that the case 110 can better limit the battery cell module 120, thereby improving the overall mechanical strength of the battery 10. In some examples, the receiving groove 140 is trumpet-shaped, and at least one side of the inner wall surface of the receiving groove 140 is an inclined straight surface or an inclined curved surface. Of course, in other examples, at least one side of the inner wall surface of the accommodating groove 140 may also be stepped, and the width of the accommodating groove 140 increases step by step in the first direction.

[0093] In some embodiments, see Figure 4 and Figure 11The inner surface 113 of the box body 110 includes a first surface 1131, which is formed as the inner wall surface of the receiving groove 140. The first surface 1131 extends obliquely in a first direction away from the battery cell module 120. Usually, the shape of the battery cell module 120 is fixed and not easy to adjust. Therefore, the inner surface 113 of the box body 110 is adjusted to make the receiving groove 140 present a "wide mouth and narrow bottom" shape. Specifically, the first surface 1131 of the box body 110, which serves as the inner wall surface of the receiving groove 140, is designed to be an inclined surface, so that the first surface 1131 can play a role in diversion. During the process of injecting glue, the first surface 1131 can guide the glue to remain at the bottom of the receiving groove 140, thereby improving the filling fullness of the glue in the receiving groove 140.

[0094] In some embodiments, see Figure 11 , the angle a between the first surface 1131 and the first direction is 30° to 45°. Generally, if the angle a is too small, it is not conducive to increasing the slot width D1 of the receiving groove 140, while if the angle a is too large, the flow conductivity of the first surface 1131 will decrease. By controlling the size of the angle a, the injection effect of the glue into the receiving groove 140 can be adjusted. As an example, the angle a is 30°, 32°, 34°, 36°, 38°, 40°, 42°, 44° or 45°.

[0095] In some embodiments, see Figure 4 and Figure 11 The inner surface 113 of the housing 110 further includes a second surface 1132. The second surface 1132 is located on a side of the first surface 1131 away from the opening 111 and is connected to the first surface 1131. The second surface 1132 extends along a first direction, and the support structure 130 is at least partially sandwiched between the second surface 1132 and the battery module 120. Typically, in this case, the first surface 1131 is inclined relative to the side of the battery module 120, while the second surface 1132 is parallel or substantially parallel to the side of the battery module 120. The support structure 130 is clamped between the case 110 and the battery cell module 120. Specifically, the support structure 130 is clamped between the second surface 1132 of the case 110 and the side of the battery cell module 120. The second surface 1132 is parallel or substantially parallel to the side of the battery cell module 120, so that the support structure 130 can better cooperate with the case 110 and the battery cell module 120, reduce the gap between the support structure 130 and the two, and thereby improve the quality of the first adhesive layer 150 and improve the strength of the connection between the case 110 and the battery cell module 120.

[0096] In some embodiments, see Figure 2 、 Figure 5 、 Figures 8 to 11The cell module 120 includes multiple cells 121 stacked face-to-face, with the spacing W between adjacent cells 121 being less than or equal to 1 mm. "Multiple" means at least two. That is, the cell module 120 includes at least two cells 121. The more cells 121 a cell module 120 contains, the higher the energy it can provide. The cells 121 in the cell module 120 are stacked face-to-face. "Face-to-face" here means that the large surface of one cell 121 faces the large surface of another cell 121. This arrangement allows for a compact structure in the cell module 120. The spacing W between adjacent cells 121 refers to the distance between the large surfaces of the two adjacent cells 121. Furthermore, this spacing W is less than or equal to 1 mm. By controlling the spacing between adjacent cells 121 in the cell module 120 to no greater than 1 mm, the risk of glue injected into the receiving groove 140 rapidly flowing out of the receiving groove 140 through the gap between adjacent cells 121 and into the bottom of the receiving cavity 112 can be reduced. As an example, the distance W is less than or equal to 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm or 1 mm. When the distance W is equal to 0, the large surfaces of two adjacent battery cells 121 are closely attached to each other.

[0097] In some embodiments, the battery cell module 120 further includes two end plates (not shown) disposed opposite to each other, and all the battery cells 121 are clamped between the two end plates.

[0098] In some embodiments, see Figure 3 、 Figure 4 、 Figure 8 and Figure 9 , the spacing between two adjacent battery cells 121 is greater than or equal to 0.1mm. That is to say, there is a gap between two adjacent battery cells 121, and the gap is connected to the receiving groove 140, so that when glue is injected into the receiving groove 140, the gas in the receiving groove 140 can be discharged from the receiving groove 140 through the gap located on one side of the receiving groove 140, which is conducive to improving the filling fullness of the glue in the receiving groove 140, thereby improving the quality of the obtained first receiving layer 150. The size of the gap is controlled, that is, the spacing W is 0.1mm to 1mm. Within this range, the glue injected into the receiving groove 140 can flow out of the receiving groove 140 in a small amount through the gap between the two adjacent battery cells 121 but will not flow into the bottom of the receiving cavity 112. On the contrary, the small amount of glue flowing out of the receiving groove 140 will solidify in the gap between the two adjacent battery cells 121, so that part of the first glue layer 150 extends into the gap between the two adjacent battery cells 121. As an example, the distance W is 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0099] In some embodiments, see Figure 4 and Figure 9 The first adhesive layer 150 includes a main body 151 and an extension 152. The main body 151 is located within the receiving groove 140, while the extension 152 extends beyond the receiving groove 140 and into the gap between two adjacent battery cells 121. This increases the contact area between the first adhesive layer 150 and the battery module 120, thereby enhancing the bonding between the first adhesive layer 150 and the battery module 120 and improving the mechanical strength of the battery 100.

[0100] In some embodiments, see Figure 5 、 Figure 6 、 Figures 8 to 11 , the battery cell module 120 further includes an isolating sheet 122, which is clamped between two adjacent battery cells 121. By providing the isolating sheet 122 between two adjacent battery cells 121, a gap can be formed between the two adjacent battery cells 121. It can be understood that the thickness of the isolating sheet 122 is equal to or substantially equal to the spacing W between the two adjacent battery cells 121. As an example, the isolating sheet 122 is bonded to the battery cell 121. Optionally, the isolating sheet 122 is an insulating structure. As an example, the isolating sheet 122 is a mica sheet or a polypropylene (PP) sheet. The number of isolating sheets 122 provided between two adjacent battery cells 121 can be one or more. As an example, see Figure 3 There are two spacers 122 between two adjacent battery cells 121 , and the two spacers 122 are spaced apart on one large surface of the battery cell 121 .

[0101] In some embodiments, see Figure 3 、 Figure 5 and Figure 10Battery 100 also includes a second adhesive layer 160, which is disposed within cavity 112 and at the bottom of housing 110. Cell module 120 is disposed on and connected to second adhesive layer 160. Because first adhesive layer 150 is located near opening 111 and second adhesive layer 160 is located away from opening 111, second adhesive layer 160 and first adhesive layer 150 are disposed near opposite ends of housing 110, respectively, and connect the cell module 120 to the opposite ends of housing 110, respectively. This further enhances the stability of the connection between cell module 120 and housing 110. During the assembly process of the battery 100, glue can be first injected into the bottom of the box body 110, and then the battery cell module 120 and the support structure 130 can be installed in the box body 110 to define the receiving groove 140. The bottom surface of the battery cell module 120 contacts the glue at the bottom of the box body 110, and the second glue layer 160 is formed after the glue at the bottom of the box body 110 is cured; then glue is injected into the receiving groove 140 again, and the first glue layer 150 is formed after the glue in the receiving groove 140 is cured.

[0102] In some embodiments, the first adhesive layer 150 is a structural adhesive layer. The structural adhesive layer is formed by curing structural adhesive. Structural adhesive has strong adhesion and can withstand large dynamic and static loads. Providing the first adhesive layer 150 as a structural adhesive layer can effectively improve the bonding strength between the battery module 120 and the housing 110. However, structural adhesive has poor fluidity. By providing the receiving groove 140, the filling degree of the structural adhesive in the receiving groove 140 can be effectively improved, thereby improving the quality of the structural adhesive layer and promoting the effective performance of the structural adhesive.

[0103] In some embodiments, the second adhesive layer 160 is also a structural adhesive layer to enhance the bonding strength between the battery module 120 and the box 110 .

[0104] In some embodiments, see Figure 10 The battery 100 further includes a battery management system module 170, which is connected to the cell module 120. The battery management system (BMS) module 170 is connected to the cell module 120, specifically electrically connected. The battery management system (BMS) module 170 can manage the cell module 120 so that the cell module 120 can operate safely and efficiently, thereby extending the service life of the battery 100. As an example, the battery management system module 170 includes a BMS board.

[0105] In some embodiments, see Figure 10The battery 100 also includes an integrated busbar 180, through which the battery management system module 170 is connected to the cell module 120. The integrated busbar 180 is also called a CCS (Cells Contact System) component. The provision of the integrated busbar 180 can achieve electrical connection between the battery cells 121 in the battery module 120, and can also electrically connect the battery module 120 and the battery management system module 170 through the integrated busbar 180. As an example, the integrated busbar 180 includes a plastic bracket and a busbar. The busbar is provided on the plastic bracket. The busbar is a conductive member. The busbar is electrically connected to the battery cells 121 in the battery module 120 and the battery management system module 170, or the busbar is electrically connected to the battery cells 121 in the battery module 120.

[0106] In some embodiments, see Figure 10 The battery 100 further includes a cover 190, which is disposed on the housing 110 to close the opening 111. The integrated busbar 180 and the battery management system module 170 are both disposed on the cover 190. Of course, in other embodiments, the integrated busbar 180 and the battery management system module 170 may also be disposed on the housing 110.

[0107] In some embodiments, see Figure 10 , battery 100 is a battery pack.

[0108] In some embodiments, the battery pack is a low-voltage battery pack, and the output voltage of the low-voltage battery pack is less than or equal to 48 V. As an example, the battery 100 can be a 12V low-voltage battery pack, a 24V low-voltage battery pack, or a 48V low-voltage battery pack.

[0109] In some embodiments, the low-voltage battery pack is a starting battery pack. A starting battery pack, also known as a starting power supply, is a power supply device used to provide initial power to a device or system to start its operation. As an example, a starting battery pack includes an automobile starting power supply.

[0110] Second, see Figure 14 , an embodiment of the present application further provides an electric device 200, which includes the battery 100 as described above.

[0111] The electrical device 200 includes the battery 100 described above. The electrical device 200 has all the beneficial effects of the battery 100 described above, which will not be described in detail in this application.

[0112] It should be noted that the electrical device 200 includes but is not limited to at least one of a vehicle and a processing tool. For example, the vehicle includes a car, an aircraft, etc.; the processing tool includes an electric drill, an electric screwdriver, etc.

[0113] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery (100), characterized in that: include: A box body (110) is provided with an opening (111) at one end and has an accommodating cavity (112) inside that is in communication with the opening (111); A battery cell module (120) is disposed in the accommodating cavity (112); a support structure (130) disposed in the accommodating cavity (112) and located between the battery module (120) and the box (110); the support structure (130) surrounds the outer periphery of the battery module (120); the support structure (130), the battery module (120) and the box (110) define an accommodating groove (140); the notch of the accommodating groove (140) faces the opening (111); The first adhesive layer (150) is filled in the receiving groove (140).

2. The battery (100) according to claim 1, characterized in that The support structure (130) comprises at least an elastic layer (131).

3. The battery (100) according to claim 2, characterized in that The support structure (130) is clamped between the battery cell module (120) and the box (110), and the elastic layer (131) is interference-fitted with the battery cell module (120) and the box (110).

4. The battery (100) according to claim 2, characterized in that The elastic layer (131) includes at least one of a foam layer and a rubber layer.

5. The battery (100) according to claim 1, characterized in that The support structure (130) is fixedly arranged on the outer peripheral surface of the battery cell module (120).

6. The battery (100) according to claim 5, characterized in that The support structure (130) includes a rigid tie (132), and the rigid tie (132) is used to bind the battery cell module (120).

7. The battery (100) according to claim 6, characterized in that The support structure (130) further includes an elastic layer (131) disposed on the surface of the rigid tie (132), and the elastic layer (131) is configured to be interference-fitted with at least one of the battery module (120) and the box (110).

8. The battery (100) according to claim 1, characterized in that The support structure (130) is arranged at a position close to the opening (111), and the distance between the support structure (130) and the bottom of the accommodating cavity (112) is greater than the distance between the support structure (130) and the opening (111).

9. The battery (100) according to any one of claims 1 to 8, characterized in that The depth of the accommodating groove (140) is 8 mm to 10 mm; and / or the width of the groove opening of the accommodating groove (140) is 10 mm to 12 mm; and / or the width of the groove bottom of the accommodating groove (140) is 3 mm to 4 mm.

10. The battery (100) according to any one of claims 1 to 8, characterized in that In a first direction, the width of the accommodating groove (140) increases, and the first direction is the direction from the groove bottom to the groove opening of the accommodating groove (140).

11. The battery (100) according to claim 10, characterized in that The inner surface (113) of the box body (110) includes a first surface (1131), the first surface (1131) being formed as an inner wall surface of the accommodating groove (140), and the first surface (1131) extending obliquely in the first direction away from the battery cell module (120).

12. The battery (100) according to claim 11, characterized in that The angle between the first surface (1131) and the first direction is 30° to 45°.

13. The battery (100) according to claim 11, characterized in that The inner surface (113) of the box body (110) further includes a second surface (1132), the second surface (1132) being located on a side of the first surface (1131) away from the opening (111) and connected to the first surface (1131), the second surface (1132) extending along the first direction, and the support structure (130) being at least partially clamped between the second surface (1132) and the battery cell module (120).

14. The battery (100) according to any one of claims 1 to 8, characterized in that The battery cell module (120) comprises a plurality of battery cells (121) sequentially stacked face to face, and the distance between two adjacent battery cells (121) is less than or equal to 1 mm.

15. The battery (100) according to claim 14, characterized in that The distance between two adjacent battery cells (121) is greater than or equal to 0.1 mm.

16. The battery (100) according to claim 15, characterized in that The battery cell module (120) further includes an isolation sheet (122), wherein the isolation sheet (122) is clamped between two adjacent battery cells (121).

17. The battery (100) according to claim 15, characterized in that The first adhesive layer (150) comprises a main body (151) and an extension portion (152), wherein the main body (151) is located in the receiving groove (140), and the extension portion (152) extends out of the receiving groove (140) and extends into the gap between two adjacent battery cells (121).

18. The battery (100) according to any one of claims 1 to 8, characterized in that The battery (100) further comprises a second adhesive layer (160), the second adhesive layer (160) being arranged in the accommodating cavity (112) and located at the bottom of the box (110), and the battery cell module (120) being arranged on the second adhesive layer (160) and connected to the second adhesive layer (160).

19. The battery (100) according to claim 18, characterized in that The first adhesive layer (150) and the second adhesive layer (160) are both structural adhesive layers.

20. The battery (100) according to any one of claims 1 to 8, characterized in that The battery (100) further comprises a battery management system module (170), and the battery management system module (170) is connected to the battery cell module (120).

21. The battery (100) according to claim 20, characterized in that The battery (100) further comprises an integrated busbar (180), and the battery management system module (170) is connected to the battery cell module (120) via the integrated busbar (180).

22. The battery (100) according to claim 21, characterized in that The battery (100) further includes a cover (190), the cover (190) being arranged on the box (110) to close the opening (111), and the integrated busbar (180) and the battery management system module (170) being both arranged on the cover (190).

23. The battery (100) according to claim 20, characterized in that The battery (100) is a battery pack.

24. The battery (100) according to claim 23, characterized in that The battery pack is a low-voltage battery pack, and the output voltage of the low-voltage battery pack is less than or equal to 48V.

25. The battery (100) according to claim 24, characterized in that The low-voltage battery pack is a starting battery pack.

26. An electrical device (200), characterized in that: A battery (100) comprising any one of claims 1 to 25.

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