Battery and electric device

Abstract

The application provides a battery and a power utilization device. The battery comprises a box body, a battery cell module and a binding structure. One end of the box body is provided with an opening and has an accommodating cavity in communication with the opening; the battery cell module is arranged in the accommodating cavity and comprises a plurality of battery cells; and the binding structure is arranged in the accommodating cavity and is clamped between the battery cell module and the box body. The binding structure is wound on the outer circumferential surface of the battery cell module to bind the plurality of battery cells together. The binding structure is elastic and is in interference fit with the battery cell module and the box body. The binding structure can bind the plurality of battery cells together and improve the mechanical impact resistance of the battery cell module as a whole. The binding structure is elastic and can effectively reduce the difficulty of the battery cell module in being accommodated in the box during the assembly of the battery.

Description

Technical Field

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

[0002] In batteries (such as battery packs) provided by related technologies, multiple battery cells are housed within the battery casing. To improve the cells' resistance to vibration or impact during use, steel strips are used to wrap and stack the cells together, securing them in place. However, this method increases the difficulty of installing the cells into the casing. Utility Model Content

[0003] The embodiments of this application provide a battery and an electrical device that can improve the battery's resistance to mechanical shock and reduce assembly difficulty.

[0004] In a first aspect, embodiments of this application provide a battery, comprising:

[0005] The box has an opening at one end and an internal cavity communicating with the opening;

[0006] A battery cell module is disposed within the receiving cavity, and the battery cell module includes multiple battery cells;

[0007] A binding structure is disposed within the receiving cavity and is clamped between the cell module and the housing. The binding structure is wrapped around the outer peripheral surface of the cell module to bind the plurality of cells together. The binding structure is elastic and is interference-fitted with the cell module and the housing.

[0008] In one embodiment, the binding structure includes at least an elastic layer.

[0009] In one embodiment, the elastic layer includes at least one of a foam layer and a rubber layer.

[0010] In one embodiment, the bundling structure further includes a rigid cable tie, and the elastic layer is disposed on the surface of the rigid cable tie, the elastic layer being configured to interfere with at least one of the cell module and the housing.

[0011] In one embodiment, the bundling structure, the cell module, and the housing define a receiving groove, the opening of which faces the opening; the battery further includes a first adhesive layer that fills the receiving groove.

[0012] In one embodiment, the binding structure is positioned near the opening, and the distance between the binding structure and the bottom of the receiving cavity is greater than the distance between the binding structure and the opening.

[0013] In one embodiment, the depth of the receiving groove is 8mm to 10mm.

[0014] In one embodiment, the width of the receiving groove is 10mm to 12mm.

[0015] In one embodiment, the bottom width of the receiving groove is 3mm to 4mm.

[0016] In one embodiment, the width of the receiving groove increases in a first direction, the first direction being from the bottom of the receiving groove to the opening of the groove.

[0017] In one embodiment, the inner surface of the housing includes a first surface, which is formed as the inner wall surface of the receiving groove, and the first surface extends obliquely away from the battery cell module in the first direction.

[0018] In one embodiment, the angle between the first surface and the first direction is 30° to 45°.

[0019] In one embodiment, the inner surface of the housing further includes a second surface located on the side of the first surface away from the opening and connected to the first surface, the second surface extending along the first direction, and the bundling structure being at least partially clamped between the second surface and the battery cell module.

[0020] In one embodiment, in the battery cell module, all the battery cells are stacked face to face sequentially, and the distance between two adjacent battery cells is less than or equal to 1 mm.

[0021] In one embodiment, the spacing between two adjacent cells is greater than or equal to 0.1 mm.

[0022] In one embodiment, the cell module further includes an isolation sheet sandwiched between two adjacent cells.

[0023] In one embodiment, the first adhesive layer includes a body and an extension, the body being located within the receiving groove, and the extension extending out of the receiving groove and into the gap between two adjacent battery cells.

[0024] In one embodiment, the battery further includes a second adhesive layer disposed within the receiving cavity and located at the bottom of the housing, and the cell module is disposed on and connected to the second adhesive layer.

[0025] In one embodiment, both the first adhesive layer and the second adhesive layer are structural adhesive layers.

[0026] In one embodiment, the battery further includes a battery management system module, which is connected to the cell module.

[0027] In one embodiment, the battery further includes an integrated busbar, through which the battery management system module is connected to the cell module.

[0028] In one embodiment, the battery further includes a cover that covers the housing to close the opening, and the integrated busbar and the battery management system module are both disposed on the cover.

[0029] In one embodiment, the battery is a battery pack.

[0030] 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.

[0031] In one embodiment, the low-voltage battery pack is a startup battery pack.

[0032] Secondly, embodiments of this application provide an electrical device including the battery described above.

[0033] The beneficial effects of the embodiments of this application are as follows:

[0034] The battery provided in this application improves the overall resistance of the battery module to mechanical shock by using a bundling structure to bind multiple battery cells in the battery module. Furthermore, due to the elasticity of the bundling structure, during battery assembly, after the bundling structure is wrapped around the outer surface of the battery module, the entire module is inserted into the housing cavity through the opening of the housing. During the insertion process, the bundling structure undergoes elastic deformation, thereby controlling the difficulty of inserting the battery module into the housing. After the battery module and bundling structure are inserted into the housing, the bundling structure is clamped between the battery module and the housing, and the bundling structure has an interference fit with both the battery module and the housing. This allows the housing to limit and support the battery module through the bundling structure, reducing the risk of the battery module shaking within the housing and further improving the battery module's resistance to mechanical shock. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural diagram of a battery provided in an embodiment of this application;

[0037] Figure 2This is a top view of a battery provided in an embodiment of this application;

[0038] Figure 3 yes Figure 2 Sectional view along the middle AA direction;

[0039] Figure 4 yes Figure 3 Enlarged view of section C;

[0040] Figure 5 yes Figure 2 Sectional view along the BB direction;

[0041] Figure 6 yes Figure 5 Enlarged view of section D;

[0042] Figure 7 This is a schematic diagram of the front view structure of a battery provided in an embodiment of this application;

[0043] Figure 8 yes Figure 7 A sectional view along the EE direction;

[0044] Figure 9 yes Figure 8 Enlarged view of section F in the middle;

[0045] Figure 10 This is a cross-sectional view of another battery provided in an embodiment of this application;

[0046] Figure 11 yes Figure 10 A cross-sectional view of the battery without the first adhesive layer, cover, battery management system module and integrated busbar.

[0047] Figure 12 This is a cross-sectional view of a bundling structure provided in an embodiment of this application;

[0048] Figure 13 This is a cross-sectional view of another bundling structure provided in an embodiment of this application;

[0049] Figure 14 This is a schematic diagram of the structure of the electrical device provided in the embodiments of this application.

[0050] Explanation of reference numerals in the attached figures:

[0051] 100. Battery;

[0052] 110. Box body; 111. Opening; 112. Receiving cavity; 113. Inner surface; 1131. First surface; 1132. Second surface;

[0053] 120. Battery cell module; 121. Battery cell; 122. Shielding sheet;

[0054] 130. Bundling structure; 131. Elastic layer; 132. Rigid cable tie;

[0055] 140. Receiving tank;

[0056] 150. First adhesive layer; 151. Main body; 152. Extension;

[0057] 160. Second adhesive layer;

[0058] 170. Battery Management System Module;

[0059] 180. Integrated busbar;

[0060] 190. Cover;

[0061] 200. Electrical appliances. Detailed Implementation

[0062] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] Furthermore, it should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operation, specifically the directions shown in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0064] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0065] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] In the description of the embodiments of this application, the words "example" or "for example" are used to indicate exemplification, illustration, or description. Any embodiment or design described as "example" or "for example" in the embodiments of this application is not to be construed as being more preferred or having more advantages than another embodiment or design. The use of the words "example" or "for example" is intended to present relative concepts in a clear manner.

[0068] To facilitate understanding of the present application, the spline curves and arrows used in the reference numerals in the accompanying drawings are explained below: spline curves without arrows indicate solid parts, that is, parts with solid structures; spline curves with arrows indicate virtual parts, that is, parts without solid structures.

[0069] Firstly, please see Figures 1 to 11 This application provides a battery 100. The battery 100 includes a housing 110, a cell module 120, and a binding structure 130. The housing 110 has an opening 111 at one end and an internal receiving cavity 112 communicating with the opening 111. The cell module 120 is disposed within the receiving cavity 112. The cell module 120 includes multiple cells 121. The binding structure 130 is also disposed within the receiving cavity 112 and is clamped between the cell module 120 and the housing 110. The binding structure 130 is wound around the outer peripheral surface of the cell module 120 to bind the multiple cells 121 together. The binding structure 130 is elastic and has an interference fit with the cell module 120 and the housing 110.

[0070] Battery 100 refers to a device that converts chemical energy into electrical energy. Battery 100 can take different forms; for example, it can be a battery pack.

[0071] The housing 110 in the battery 100 serves as a container for holding and protecting the battery cell module 120. The housing 110 can have different shapes, including but not limited to a cube, cuboid, and cylindrical shape. The material of the housing 110 includes, but is not limited to, at least one of metal and plastic. The housing 110 has two opposite ends; one end of the housing 110 has an opening 111, and the other end of the housing 110 can be either closed or open. The housing 110 also has a receiving cavity 112, which communicates with the opening 111, through which the battery cell module 120 and the bundling structure 130 can be placed.

[0072] Cell module 120 refers to a unit structure containing cell 121. Cell 121, also known as a battery cell, is the basic unit for converting chemical energy into electrical energy. Optionally, cell 121 is a rechargeable cell, which can realize the interconversion of chemical energy and electrical energy. Cell module 120 contains multiple cells 121. As an example, multiple cells 121 are spliced ​​together to form cell module 120.

[0073] The bundling structure 130 can be used to bundle multiple battery cells 121. Specifically, the bundling structure 130 is wrapped around the outer peripheral surface of the battery cell module 120, thereby binding multiple battery cells 121 together. The bundling structure 130 is also disposed within the receiving cavity 112, and is clamped between the battery cell module 120 and the housing 110. The bundling structure 130 is elastic, so that when the bundling structure 130 is clamped between the battery cell module 120 and the housing 110, the bundling structure 130 can undergo elastic deformation and make an interference fit with the battery cell module 120 and the housing 110.

[0074] The battery 100 provided in this application embodiment enhances the overall mechanical shock resistance of the cell module 120 by using a bundling structure 130 to bind multiple cells 121 in the cell module 120. Furthermore, because the bundling structure 130 is elastic, during the assembly of the battery 100, after the bundling structure 130 is wrapped around the outer periphery of the cell module 120, the entire battery is inserted into the receiving cavity 112 of the housing 110 through the opening 111 of the housing 110. During the insertion process, the bundling structure 130 undergoes elastic deformation, thereby... The difficulty of inserting the battery cell module 120 into the box can be controlled. After the battery cell module 120 and the bundling structure 130 are inserted into the box, the bundling structure 130 is clamped between the battery cell module 120 and the box 110. The bundling structure 130 is interference-fitted with the battery cell module 120 and the box 110. In this way, the box 110 can limit and support the battery cell module 120 through the bundling structure 130, reduce the risk of the battery cell module 120 shaking in the box 110, and further improve the battery cell module 120's resistance to mechanical shock.

[0075] In some implementations, please refer to Figures 2 to 11 The battery 100 also includes a first adhesive layer 150. The bundling structure 130, the cell module 120, and the housing 110 define a receiving groove 140; the opening of the receiving groove 140 faces the opening 111. The first adhesive layer 150 fills the receiving groove 140.

[0076] In this configuration, the binding structure 130 can also be used to support the first adhesive layer 150. Specifically, the binding structure 130 and the cell module 120 are disposed together within the receiving cavity 112, with the binding structure 130 surrounding the outer periphery of the cell module 120. Thus, the binding structure 130 is located between the cell module 120 and the housing 110. The binding structure 130, the cell module 120, and the housing 110 together define a U-shaped receiving groove 140, where the cell module 120 and the housing 110 respectively form opposite side walls of the receiving groove 140, and the binding structure 130 forms the bottom wall of the receiving groove 140. The opening of the receiving groove 140 faces upwards (e.g., ...). Figure 11 As shown in the diagram, the opening of the receiving groove 140 faces the opening 111 of the housing 110. Adhesive can be filled into the receiving groove 140 through the opening 111 of the housing 110. After the adhesive cures, a first adhesive layer 150 is formed in the receiving groove 140. The shape of the first adhesive layer 150 is adapted to the shape of the receiving groove 140.

[0077] The binding structure 130 is disposed within the receiving cavity 112. Therefore, the depth of the receiving groove 140 is always less than the depth of the receiving cavity 112. The depth of the receiving groove 140 can be adjusted by adjusting the position of the binding structure 130 within the receiving cavity 112. Generally, the farther the binding structure 130 is from the opening 111, the deeper the receiving groove 140; conversely, the closer the binding structure 130 is to the opening 111, the shallower the receiving groove 140.

[0078] In summary, the above technical solution involves setting a binding structure 130 around the outer periphery of the cell module 120 within the receiving cavity 112 of the housing 110. The binding structure 130 is positioned between the housing 110 and the cell module 120. The binding structure 130, together with the housing 110 and the cell module 120, defines a receiving groove 140. Adhesive can then be filled into the receiving groove 140 through the opening 111 of the housing 110. After the adhesive cures, a first adhesive layer 150 is obtained within the receiving groove 140. The first adhesive layer 150 connects the housing 110 and the cell module 120 together, improving the mechanical strength of the battery 100. Furthermore, compared to the depth of the receiving cavity 112, the depth of the receiving groove 140 is smaller. Thus, compared to filling the receiving cavity 112 with glue, the flow path of the glue is shorter when filling the receiving groove 140 with glue. This can improve the fullness of the glue filling in the receiving groove 140 to a certain extent, reduce the probability of defects such as pores, depressions, and delamination in the first adhesive layer 150, improve the quality uniformity of the first adhesive layer 150, and thus improve the stability and strength of the bond between the housing 110 and the cell module 120, thereby effectively improving the performance of the battery 100 against mechanical shock.

[0079] In some embodiments, the bundling structure 130 includes at least an elastic layer 131. That is, the elastic layer 131 of the bundling structure 130 can change shape under stress. Compared to a purely rigid structure, including the elastic layer 131 in the bundling structure 130 offers several advantages: First, when the battery 100 is subjected to mechanical impact, the elastic layer 131 can act as a buffer, reducing the risk of damage to the cell module 120 due to a hard collision between it and the housing 110; second, it reduces assembly difficulty. As an example, when assembling the battery 100, the bundling structure 130 and the cell module 120 are first placed together and then inserted into the housing 110. During the insertion process, when the bundling structure 130 encounters resistance, the elastic layer 131 can deform appropriately, thereby reducing the difficulty of insertion.

[0080] It should be noted that the binding structure 130 can be set as a purely elastic structure; for example, please refer to [link to example]. Figure 12The binding structure 130 includes only the elastic layer 131; the binding structure 130 can also be configured as a composite structure combining a rigid structure and an elastic structure; for example, please refer to Figure 13 The binding structure 130 includes a rigid cable tie 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 aforementioned material layers have a low elastic modulus, thereby giving the elastic layer 131 good elastic deformation capability.

[0082] In some implementations, please refer to Figure 4 , Figure 6 and Figure 8 The bundling structure 130 is clamped between the cell module 120 and the housing 110, and the elastic layer 131 is interference-fitted with both the cell module 120 and the housing 110. Since the bundling structure 130 includes the elastic layer 131, the elastic layer 131 can deform when the bundling structure 130 is clamped by the cell module 120 and the housing 110. The interference fit between the elastic layer 131 and the cell module 120 and the housing 110 simultaneously reduces the gap between the bundling structure 130 and the cell module 120, as well as the gap between the bundling structure 130 and the housing 110. This prevents the adhesive filled in the receiving groove 140 from flowing out through these gaps, thereby improving the filling effect of the adhesive in the receiving groove 140 and ultimately improving the quality of the first adhesive layer 150. In addition, the elastic layer 131 is interference-fitted with the battery cell module 120 and the housing 110, which can also limit the binding structure 130. During the process of filling the adhesive in the receiving groove 140, the risk of displacement of the binding structure 130 can be reduced, thereby ensuring the molding effect of the first adhesive layer 150.

[0083] In some embodiments, the bundling structure 130 is also adhesively attached to the cell module 120. That is, the bundling structure 130 is adhesively attached to the outer peripheral surface of the cell module 120. The adhesive method is simple and easy to operate.

[0084] In some implementations, please refer to Figure 12The bundling structure 130 also includes a rigid cable tie 132, with an elastic layer 131 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 binds the battery cell module 120, the elastic layer 131 and the battery cell module 120 are in an interference fit. Simultaneously, the housing 110 compresses the bundling structure 130, and the elastic layer 131 also remains in an interference fit with the battery cell 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 binds the battery cell module 120, the elastic layer 131 is located between the rigid cable tie 132 and the battery cell module 120, and the elastic layer 131 is in an interference fit with the battery cell module 120. As another example, the elastic layer 131 is located on one side surface of the rigid cable tie 132. When the rigid cable tie 132 binds the battery cell module 120, the elastic layer 131 is located on the side of the rigid cable tie 132 away from the battery cell module 120. The housing 110 compresses the binding structure 130, and the elastic layer 131 is interference-fitted with the housing 110. That is, by adjusting the position of the elastic layer 131 on the rigid cable tie 132, the elastic layer 131 can be interference-fitted with at least one of the battery cell module 120 and the housing 110, thereby reducing the risk of glue flowing out of the receiving groove 140 during glue injection to a certain extent.

[0085] The bundling structure 130 includes a rigid cable tie 132, which has high mechanical strength, thereby better securing the cell module 120. Especially in the later stages of battery cycle 100, as the cell 121 expands internally, the high mechanical strength of the rigid cable tie 132 can reduce the risk of breakage. Optionally, the rigid cable tie 132 is a metal cable tie, such as a steel cable tie.

[0086] As can be seen, by including a rigid cable tie 132 and an elastic layer 131 in the bundling structure 130, the bundling structure 130 not only has high mechanical strength and reduces the risk of breakage, but also can be interference-fitted with at least one of the battery cell module 120 and the housing 110, thereby improving the molding effect of the first adhesive layer 150.

[0087] In some embodiments, the binding structure 130 is positioned near the opening 111, specifically, the distance between the binding structure 130 and the bottom of the receiving cavity 112 is greater than the distance between the binding structure 130 and the opening 111. This arrangement facilitates control of the depth of the receiving groove 140, preventing the groove from becoming too deep and reducing the fullness of the adhesive filling within it, thus affecting the molding quality of the first adhesive layer 150.

[0088] In some implementations, please refer to Figure 11The depth H of the receiving groove 140 is 8mm to 10mm. Generally, the depth H of the receiving groove 140 should not be too large, otherwise the fullness of the adhesive filling within the receiving groove 140 will decrease, reducing the molding quality of the first adhesive layer 150; however, the depth H of the receiving groove 140 should not be too small either, otherwise the thickness of the first adhesive layer 150 will be too thin, reducing the bonding strength between the battery module 120 and the housing 110. For example, the depth H is 8mm, 8.5mm, 9mm, 9.5mm, or 10mm.

[0089] In some implementations, please refer to Figure 11 The slot width D1 of the receiving groove 140 is 10mm to 12mm. If the slot width D1 is too small, it will be difficult to inject adhesive into the receiving groove 140. Increasing the slot width D1 would require increasing the distance between the cell module 120 and the housing 110 or changing the structure of the housing 110, which would easily increase the design complexity and production cost of the battery 100. For example, the slot width D1 of the receiving groove 140 can be 10mm, 10.5mm, 11mm, 11.5mm, or 12mm.

[0090] In some implementations, please refer to Figure 11 The bottom width D2 of the receiving groove 140 is 3mm to 4mm. A bottom width D2 that is too small is generally not conducive to adhesive filling, especially when the gap in the bottom wall of the receiving groove 140 is sealed. During adhesive injection, gas cannot be effectively released, resulting in ineffective contact between the first adhesive layer 150 and the bottom wall of the receiving groove 140, thus affecting the bonding strength between the large cell module 120 and the housing 110. Increasing the bottom width D2 of the receiving groove 140 requires increasing the distance between the cell module 120 and the housing 110, which in turn affects the fit between the cell module 120 and the housing 110, further hindering the improvement of the overall mechanical strength of the battery 10. As an example, the groove opening width D1 of the receiving groove 140 can be 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, or 4mm.

[0091] In some implementations, please refer to Figure 4 , Figure 6 and Figure 11In a first direction, the width of the receiving groove 140 increases from the bottom to the opening of the groove. That is, the receiving groove 140 has a "wide opening, narrow bottom" design. The advantage of this design is that the opening width D1 of the receiving groove 140 can be increased without simultaneously increasing the bottom width D2, thus keeping the bottom width D2 within a relatively small range. Increasing the opening width D1 facilitates the flow of adhesive into the receiving groove 140, while keeping the bottom width D2 within a relatively small range means that the distance between the cell module 120 and the housing 110 is also smaller. This allows the housing 110 to better constrain the cell module 120, improving the overall mechanical strength of the battery 10. In some examples, the receiving groove 140 is funnel-shaped, and at least one 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 inner wall of the receiving groove 140 may also be stepped, with the width of the receiving groove 140 increasing stepwise in the first direction.

[0092] In some implementations, please refer to Figure 4 and Figure 11 The inner surface 113 of the housing 110 includes a first surface 1131, which forms the inner wall of the receiving groove 140. The first surface 1131 extends obliquely away from the battery cell module 120 in a first direction. Since the battery cell module 120 typically has a fixed shape and is difficult to adjust, the inner surface 113 of the housing 110 is adjusted to make the receiving groove 140 have a "wide opening and narrow bottom" shape. Specifically, the first surface 1131 on the housing 110, which serves as the inner wall of the receiving groove 140, is designed as an inclined surface, allowing it to act as a guide. During the injection of adhesive, the first surface 1131 can guide the adhesive to remain at the bottom of the receiving groove 140, improving the fullness of the adhesive filling within the receiving groove 140.

[0093] In some implementations, please refer to Figure 11 The angle α between the first surface 1131 and the first direction is 30° to 45°. Generally, if the angle α is too small, it will be detrimental to increasing the opening width D1 of the receiving groove 140, while if the angle α is too large, it will reduce the flow-guiding capacity of the first surface 1131. By controlling the size of the angle α, the injection effect of the adhesive in the receiving groove 140 can be adjusted. As an example, the angle α is 30°, 32°, 34°, 36°, 38°, 40°, 42°, 44°, or 45°.

[0094] In some implementations, please refer to Figure 4 and Figure 11The inner surface 113 of the housing 110 also includes a second surface 1132, which is located on the side of the first surface 1131 away from the opening 111 and connected to the first surface 1131. The second surface 1132 extends along a first direction, and the binding structure 130 is at least partially clamped between the second surface 1132 and the cell module 120. Typically, in this configuration, the first surface 1131 is inclined relative to the side of the cell module 120, while the second surface 1132 is parallel or substantially parallel to the side of the cell module 120. The bundling structure 130 is clamped between the housing 110 and the cell module 120. Specifically, the bundling structure 130 is clamped between the second surface 1132 of the housing 110 and the side of the cell module 120. The second surface 1132 is parallel or substantially parallel to the side of the cell module 120, which allows the bundling structure 130 to better cooperate with the housing 110 and the cell module 120, reducing the gap between the bundling structure 130 and the two, thereby improving the quality of the first adhesive layer 150 and improving the bonding strength between the housing 110 and the cell module 120.

[0095] In some implementations, please refer to Figure 2 , Figure 5 , Figures 8 to 11 The battery module 120 includes a plurality of battery cells 121 arranged face-to-face in sequence, with the spacing W between two adjacent battery cells 121 being less than or equal to 1 mm. "A plurality of" means at least two. That is, the battery module 120 includes at least two battery cells 121. The more battery cells 121 included in the battery module 120, the higher the energy it can provide. The battery cells 121 in the battery module 120 are arranged face-to-face in sequence. Here, "face-to-face" means that the large surface of one battery cell 121 faces the large surface of another battery cell 121. This arrangement makes the battery module 120 structurally compact. The spacing W between two adjacent battery cells 121 refers to the distance between the large surfaces of two adjacent battery cells 121. Furthermore, this spacing W is less than or equal to 1 mm. By controlling the spacing between two adjacent battery cells 121 in the battery module 120 to be no greater than 1 mm, the risk of adhesive injected into the receiving groove 140 rapidly flowing out of the receiving groove 140 through the gap between two adjacent battery cells 121 and flowing into the bottom of the receiving cavity 112 can be reduced. As an example, the spacing W is less than or equal to 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, or 1mm. When the spacing W is equal to 0, the large surfaces of two adjacent cells 121 are in close contact.

[0096] In some embodiments, the cell module 120 also includes two end plates (not shown) disposed opposite each other, with all the cells 121 sandwiched between the two end plates.

[0097] In some implementations, please refer to Figure 3 , Figure 4 , Figure 8 and Figure 9 The spacing between two adjacent battery cells 121 is greater than or equal to 0.1 mm. That is, there is a gap between two adjacent battery cells 121, which communicates with the receiving groove 140. When adhesive is injected into the receiving groove 140, gas inside the receiving groove 140 can be discharged through this gap located on one side of the receiving groove 140. This helps to improve the filling fullness of the adhesive in the receiving groove 140, thereby improving the quality of the resulting first receiving layer 150. The size of this gap is controlled, i.e., the spacing W is 0.1 mm to 1 mm. Within this range, a small amount of adhesive injected into the receiving groove 140 can flow out of the receiving groove 140 through the gap between two adjacent battery cells 121, but it will not flow into the bottom of the receiving cavity 112. Instead, the small amount of adhesive flowing out of the receiving groove 140 will solidify within the gap between two adjacent battery cells 121, so that part of the first adhesive layer 150 extends into the gap between two adjacent battery cells 121. As an example, the spacing W is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm.

[0098] In some implementations, please refer to Figure 4 and Figure 9 The first adhesive layer 150 includes a body 151 and an extension 152. The body 151 is located within the receiving groove 140, while the extension 152 extends out of 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 cell module 120, thereby improving the bonding effect between the first adhesive layer 150 and the battery cell module 120 and improving the mechanical strength of the battery 100.

[0099] In some implementations, please refer to Figure 5 , Figure 6 , Figures 8 to 11 The battery cell module 120 also includes a spacer 122 sandwiched between two adjacent battery cells 121. By placing the spacer 122 between two adjacent battery cells 121, a gap is formed between them. It is understood that the thickness of the spacer 122 is equal to or substantially equal to the distance W between the two adjacent battery cells 121. As an example, the spacer 122 is bonded to the battery cells 121. Optionally, the spacer 122 is an insulating structure. As an example, the spacer 122 is a mica sheet or a polypropylene (PP) sheet. The number of spacers 122 disposed between two adjacent battery cells 121 can be one or more. For example, see [link to example]. Figure 3 There are two isolation plates 122 between two adjacent cells 121, and the two isolation plates 122 are spaced apart on one side of the large surface of the cell 121.

[0100] In some implementations, please refer to Figure 3 , Figure 5 and Figure 10 The battery 100 also includes a second adhesive layer 160, which is disposed within the receiving cavity 112 and located at the bottom of the housing 110. The cell module 120 is disposed on and connected to the second adhesive layer 160. Since the first adhesive layer 150 is close to the opening 111 and the second adhesive layer 160 is far from the opening 111, the second adhesive layer 160 and the first adhesive layer 150 are respectively positioned close to opposite ends of the housing 110, and the second adhesive layer 160 and the first adhesive layer 150 respectively connect the cell module 120 to the opposite ends of the housing 110. This further improves the stability of the connection between the cell module 120 and the housing 110. During the assembly of battery 100, glue can be injected into the bottom of the housing 110 first, and then the cell module 120 and the bundling structure 130 can be installed into the housing 110 to define the receiving groove 140. The bottom surface of the cell module 120 is in contact with the glue at the bottom of the housing 110. After the glue at the bottom of the housing 110 is cured, a second glue layer 160 is formed. Then glue is injected into the receiving groove 140. After the glue in the receiving groove 140 is cured, a first glue layer 150 is formed.

[0101] 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. Using the first adhesive layer 150 as a structural adhesive layer can effectively improve the bonding strength between the battery cell module 120 and the housing 110. However, structural adhesive has poor flowability. By providing the receiving groove 140, the filling fullness of the structural adhesive within 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.

[0102] In some embodiments, the second adhesive layer 160 is also a structural adhesive layer, which enhances the bonding strength between the cell module 120 and the housing 110.

[0103] In some implementations, please refer to Figure 10 The battery 100 also includes a battery management system module 170, which is connected to the cell module 120. The battery management system (BMS) module 170 is electrically connected to the cell module 120. The BMS module 170 manages the cell module 120, enabling it to operate safely and efficiently, thereby extending the lifespan of the battery 100. As an example, the battery management system module 170 includes a BMS board.

[0104] In some implementations, please refer to 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, also known as a CCS (Cells Contact System) assembly, enables electrical connections between the cells 121 in the cell module 120. Furthermore, the integrated busbar 180 also connects the cell module 120 to the battery management system module 170. As an example, the integrated busbar 180 includes a plastic support and a busbar. The busbar is mounted on the plastic support and is a conductive component. The busbar is electrically connected to both the cells 121 in the cell module 120 and the battery management system module 170, or vice versa.

[0105] In some implementations, please refer to Figure 10 The battery 100 also includes a cover 190, which covers 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.

[0106] In some implementations, please refer to Figure 10 Battery 100 is a battery pack.

[0107] In some implementations, the battery pack is a low-voltage battery pack with an output voltage less than or equal to 48V. For example, battery 100 can be a 12V low-voltage battery pack, a 24V low-voltage battery pack, or a 48V low-voltage battery pack.

[0108] In some implementations, the low-voltage battery pack is a starter battery pack. A starter battery pack, also known as a starting power supply, is a power source used to provide initial power to a device or system to start it up. As an example, a starter battery pack includes an automotive starter power supply.

[0109] Secondly, please see Figure 14 This application embodiment also provides an electrical device 200, which includes the battery 100 as described above.

[0110] The power device 200 includes the battery 100 described above, and the power device 200 has all the beneficial effects of the battery 100 described above, which will not be repeated here.

[0111] 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, a vehicle includes a vehicle, an aircraft, etc.; a processing tool includes an electric drill, an electric screwdriver, etc.

[0112] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery (100), characterized in that, include: The box body (110) has an opening (111) at one end and an internal receiving cavity (112) communicating with the opening (111); A battery cell module (120) is disposed within the receiving cavity (112), and the battery cell module (120) includes a plurality of battery cells (121); A binding structure (130) is disposed within the receiving cavity (112) and is clamped between the cell module (120) and the housing (110). The binding structure (130) is wrapped around the outer peripheral surface of the cell module (120) to bind the plurality of cells (121) together. The binding structure (130) is elastic and is interference-fitted with the cell module (120) and the housing (110).

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

3. 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.

4. The battery (100) according to claim 2, characterized in that, The bundling structure (130) further includes a rigid cable tie (132), and an elastic layer (131) is disposed on the surface of the rigid cable tie (132). The elastic layer (131) is configured to have an interference fit with at least one of the battery cell module (120) and the housing (110).

5. The battery (100) according to any one of claims 1 to 4, characterized in that, The bundling structure (130), the battery cell module (120), and the housing (110) define a receiving groove (140), with the opening of the receiving groove (140) facing the opening (111); The battery (100) further includes a first adhesive layer (150) that fills the receiving groove (140).

6. The battery (100) according to claim 5, characterized in that, The binding structure (130) is located near the opening (111), and the distance between the binding structure (130) and the bottom of the receiving cavity (112) is greater than the distance between the binding structure (130) and the opening (111).

7. The battery (100) according to claim 5, characterized in that, The depth of the receiving groove (140) is 8mm to 10mm; and / or, the width of the groove opening of the receiving groove (140) is 10mm to 12mm; and / or, the width of the bottom of the receiving groove (140) is 3mm to 4mm.

8. The battery (100) according to claim 5, characterized in that, 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 opening of the groove.

9. The battery (100) according to claim 8, characterized in that, The inner surface (113) of the housing (110) includes a first surface (1131), which is formed as the inner wall of the receiving groove (140), and the first surface (1131) extends obliquely in the first direction away from the cell module (120).

10. The battery (100) according to claim 9, characterized in that, The angle between the first surface (1131) and the first direction is 30°~45°.

11. The battery (100) according to claim 9, characterized in that, The inner surface (113) of the housing (110) further includes a second surface (1132), which is located on the side of the first surface (1131) away from the opening (111) and connected to the first surface (1131). The second surface (1132) extends along the first direction, and the binding structure (130) is at least partially clamped between the second surface (1132) and the cell module (120).

12. The battery (100) according to claim 5, characterized in that, In the battery cell module (120), all the battery cells (121) are stacked face to face in sequence, and the distance between two adjacent battery cells (121) is less than or equal to 1 mm.

13. The battery (100) according to claim 12, characterized in that, The spacing between two adjacent cells (121) is greater than or equal to 0.1 mm.

14. The battery (100) according to claim 13, characterized in that, The cell module (120) also includes an isolation sheet (122) which is sandwiched between two adjacent cells (121).

15. The battery (100) according to claim 13, characterized in that, The first adhesive layer (150) includes a body (151) and an extension (152). The body (151) is located in the receiving groove (140), and the extension (152) extends out of the receiving groove (140) and into the gap between two adjacent cells (121).

16. The battery (100) according to claim 5, characterized in that, The battery (100) further includes a second adhesive layer (160), which is disposed in the receiving cavity (112) and located at the bottom of the housing (110). The cell module (120) is disposed on the second adhesive layer (160) and connected to the second adhesive layer (160).

17. The battery (100) according to claim 16, characterized in that, Both the first adhesive layer (150) and the second adhesive layer (160) are structural adhesive layers.

18. The battery (100) according to any one of claims 1 to 4, characterized in that, The battery (100) also includes a battery management system module (170), which is connected to the cell module (120).

19. The battery (100) according to claim 18, characterized in that, The battery (100) also includes an integrated busbar (180), and the battery management system module (170) is connected to the cell module (120) through the integrated busbar (180).

20. The battery (100) according to claim 19, characterized in that, The battery (100) also includes a cover (190) which covers 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).

21. The battery (100) according to claim 18, characterized in that, The battery (100) is a battery pack.

22. The battery (100) according to claim 21, 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.

23. The battery (100) according to claim 22, characterized in that, The low-voltage battery pack is a startup battery pack.

24. An electrical appliance (200), characterized in that: Includes the battery (100) as described in any one of claims 1 to 23.

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