Battery, power utilization device and side plate

Abstract

The utility model discloses a battery, a power utilization device and a side plate, and belongs to the technical field of batteries. The battery comprises a box body and a side plate, the box body forms a cavity; the battery cell group is mounted in the cavity and comprises a plurality of battery cells which are stacked in the first direction; the side plate is mounted in the cavity and is clamped between an edge beam of the box body and the side surface of the battery cell group along the first direction, the side plate comprises a first sub-plate and a second sub-plate, one sides, facing each other, of the first sub-plate and the second sub-plate are provided with matching surfaces in wedge-shaped matching, the matching surfaces obliquely extend towards the first direction along the second direction, and the second direction is intersected with the first direction; when the first daughter board and the second daughter board are located at the first matching position, the first daughter board abuts against the side face, in the first direction, of the battery cell set, and the second daughter board abuts against the edge beam of the box body. The overall width of the side plate can be changed by adjusting the matching position of the first sub-plate and the second sub-plate, so that stable fixation and flexible adjustment of the battery cell group in the cavity are realized, and the risk of battery cell deformation is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery, an electrical device, and a side plate. Background Art

[0002] In the related art, when a battery module is placed inside a tray, assembly gaps need to be left on both large surfaces of the module, and the gaps are filled with glue injection. However, the glue injection process is complex, the process time is long, it is difficult to control the size of the assembly gap, the glue is likely to overflow everywhere during the glue injection process, and it cannot prevent the expansion of the battery cells, so there is room for improvement. Summary of the Utility Model

[0003] This application aims to at least solve the technical problems in the related art that the glue injection process is complex and the expansion of the battery cells cannot be improved. For this purpose, this application provides a battery, an electrical device, and a side plate, which can reduce the risk of lithium deposition due to the expansion of the battery cells during charge and discharge, thereby reducing the possibility of deformation of the battery cells.

[0004] In a first aspect, this application provides a battery, including:

[0005] A box body that forms a cavity;

[0006] A battery cell group installed in the cavity, including a plurality of battery cells stacked along a first direction;

[0007] A side plate installed in the cavity and clamped between a side beam of the box body and a side surface of the battery cell group along the first direction. The side plate includes a first sub-plate and a second sub-plate. One side of the first sub-plate and the second sub-plate facing each other has mating surfaces with a wedge fit. The mating surfaces extend obliquely along a second direction toward the first direction, and the second direction intersects with the first direction; when the first sub-plate and the second sub-plate are in a first mating position, the first sub-plate abuts against the side surface of the battery cell group along the first direction, and the second sub-plate abuts against the side beam of the box body.

[0008] The side plate structure is composed of the first sub-plate and the second sub-plate, and mating surfaces with a wedge fit are provided on one side of the first sub-plate and the second sub-plate facing each other. By adjusting the mating position of the first sub-plate and the second sub-plate, the overall width of the side plate can be changed, so as to achieve stable fixation and flexible adjustment of the battery cell group in the cavity, thereby reducing the risk of deformation of the battery cells.

[0009] According to an embodiment of this application, the sum of the width of the battery cell group along the first direction and the first width of the side plate on the side surface of the battery cell group is not greater than the width of the cavity along the first direction. The first width is the width when the first sub-plate and the second sub-plate are in a second mating position, and the width of the side plate is the smallest when the first sub-plate and the second sub-plate are in the second mating position.

[0010] The side plate structure is formed by the first sub - plate and the second sub - plate, which can ensure that the battery cell group and the side plate are safely placed and fixed in the cavity. At the same time, the relative displacement between the first sub - plate and the second sub - plate can adjust the width of the side plate, enabling the battery cell group to be flexibly adjusted in the cavity.

[0011] According to an embodiment of the present application, the first sub - plate includes multiple groups of first mating surfaces distributed along the second direction, and the second sub - plate includes multiple groups of second mating surfaces distributed along the second direction. The multiple groups of first mating surfaces correspond to the multiple groups of second mating surfaces one by one.

[0012] The design of multiple groups of mating surfaces can make the cooperation between the first sub - plate and the second sub - plate more reliable, while improving the overall stability and precision of the side plate.

[0013] According to an embodiment of the present application, the height of a group of second mating surfaces at the end along the second direction in the multiple groups of second mating surfaces is less than the corresponding first mating surface.

[0014] The height of a group of second mating surfaces at the end along the second direction in the multiple groups of second mating surfaces being less than the corresponding first mating surface can adjust the tightness, facilitating the cooperation between the first sub - plate and the second sub - plate.

[0015] According to an embodiment of the present application, the height of the second sub - plate along the second direction is less than the height of the first sub - plate along the second direction.

[0016] The height of the second sub - plate along the second direction being less than the height of the first sub - plate along the second direction can optimize the cooperation mechanism of the side plate and improve the structural stability.

[0017] According to an embodiment of the present application, when the first sub - plate and the second sub - plate are in the first mating position, one end of the second sub - plate along the second aspect is lower than the corresponding end of the first sub - plate along the second aspect to form a pit, and the pit is filled with glue.

[0018] When the first sub - plate and the second sub - plate are in the first mating position, by forming the pit at one end of the second sub - plate along the second direction and filling it with glue, the connection between the first sub - plate and the second sub - plate can be strengthened, thereby improving the stability and reliability of the entire side plate structure.

[0019] According to an embodiment of the present application, the mating surfaces of the first sub - plate and the second sub - plate facing each other are provided with teeth so that the mating surfaces of the first sub - plate and the second sub - plate facing each other can be engaged.

[0020] The toothed structure can enhance the connection strength between the first sub-plate and the second sub-plate through a bite action, so that the first sub-plate and the second sub-plate are more closely combined together to form a stable overall structure, thereby improving the stability and adaptability of the side plate structure and reducing the risk of loosening or damage caused by vibration or impact.

[0021] According to an embodiment of the present application, the side panel includes a plurality of the second sub-panels corresponding to the first sub-panels, the plurality of the second sub-panels are distributed along a third direction, and the third direction, the second direction and the first direction intersect in pairs.

[0022] Through the cooperation of the first sub-board and multiple second sub-boards, the side panel can firmly fix the battery cell group to prevent it from moving in the cavity, and can also adapt to the needs of battery cell groups of different sizes. By adjusting the positions of multiple second sub-boards, battery cell groups of different sizes can be matched.

[0023] According to one embodiment of the present application, the first sub-board includes:

[0024] Base plate;

[0025] A first protrusion is arranged on a side of the bottom plate facing the second sub-plate, and a first matching surface is arranged on a side of the first protrusion facing away from the bottom plate.

[0026] The first sub-board is composed of the bottom board and the first protrusion, and the first mating surface is provided on the side of the first protrusion facing away from the bottom board, so that the first sub-board and the second sub-board can be closely matched to form a stable side board structure.

[0027] According to one embodiment of the present application, the first protrusions include a plurality of first protrusions distributed at intervals, and the orthographic projections of two adjacent first protrusions along the third direction have an overlapping area, and the third direction, the second direction and the first direction intersect each other.

[0028] The first protrusions include a plurality of protrusions that are spaced apart and distributed, and the orthographic projections of two adjacent first protrusions along the third direction have an overlapping area, which can enhance the connection strength and stability between the first sub-board and the second sub-board.

[0029] According to an embodiment of the present application, the first sub-board further includes: a reinforcing rib, which is provided on a side of the bottom plate away from the battery cell group, and the first protrusion is connected to at least a portion of the reinforcing rib.

[0030] Through the tight connection and synergy of the reinforcing ribs, the first protrusions, and the bottom plate, the overall stability of the first sub-plate is significantly improved, which not only helps to reduce the movement or shaking of the battery cell group inside the battery module but also can resist the impact of external shocks and vibrations on the battery module.

[0031] According to an embodiment of the present application, the second sub-plate includes:

[0032] A main frame;

[0033] A mating plate disposed on one side of the frame facing the first sub-plate, and a second mating surface is provided on the side of the mating plate facing the first sub-plate.

[0034] The second sub-plate can be tightly fitted with the first sub-plate through the two parts of the main frame and the mating plate to form a stable side plate structure. At the same time, the main frame can provide stable support and stress dispersion for the mating plate and further enhance the overall performance of the second sub-plate.

[0035] According to an embodiment of the present application, support ribs are provided on the back of the mating plate, and the support ribs are connected to the main frame.

[0036] The support ribs on the back of the mating plate are connected to the main frame, which can enhance the strength and stability of the structure, ensure that the mating plate is firmly fixed in place, and at the same time, the width of the support ribs in the third direction is greater than the width of the first protrusions in the third direction, which can further improve the support effect.

[0037] According to an embodiment of the present application,

[0038] A wire routing groove is provided on a section of the first sub-plate along the second direction;

[0039] And / or,

[0040] A glue storage groove is provided on a section of the first sub-plate along the second direction.

[0041] The provision of the wire routing groove or the glue storage groove on a section of the first sub-plate along the second direction can keep the circuit clean and orderly while achieving firm adhesion between components.

[0042] In a second aspect, the present application provides an electrical device, including:

[0043] A battery as described in any one of the above, and the battery is used to provide electrical energy for the electrical device.

[0044] The electrical device integrates the battery as an energy source to drive its internal working mechanism or perform specific functions.

[0045] In a third aspect, the present application provides a side plate applied to a battery, including: a first sub-plate and a second sub-plate. The sides of the first sub-plate and the second sub-plate facing each other have mating surfaces with a wedge fit. The mating surfaces extend obliquely in a second direction towards a first direction, the second direction intersects with the first direction, and the width of the side plate is different at different mating positions of the first sub-plate and the second sub-plate along the second direction.

[0046] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0048] Figure 1 is one of the schematic structural diagrams of the battery provided by the embodiment of the present application;

[0049] Figure 2 is the schematic structural diagram of the battery cell and the side plate provided by the embodiment of the present application;

[0050] Figure 3 is another schematic structural diagram of the battery provided by the embodiment of the present application;

[0051] Figure 4 is Figure 3 the partial enlarged view at A in

[0052] Figure 5 the schematic diagram of the box structure of the battery provided by the embodiment of the present application;

[0053] Figure 6 is another schematic structural diagram of the battery provided by the embodiment of the present application;

[0054] Figure 7 is Figure 6 the partial enlarged view at B in

[0055] Figure 8 is the schematic structural diagram of the side plate provided by the embodiment of the present application;

[0056] Figure 9 is Figure 8 the partial enlarged view at C in

[0057] Figure 10 is one of the schematic structural diagrams of the second sub-plate of the side plate provided by the embodiment of the present application;

[0058] Figure 11 is another schematic structural diagram of the second sub-plate of the side plate provided by the embodiment of the present application.

[0059] Reference signs:

[0060] Battery 1;

[0061] Box body 10, cavity 110, side beam 120;

[0062] Cell group 20, cell 210;

[0063] Side plate 30, pit 301;

[0064] First sub-plate 310, bottom plate 311, first protrusion 312, first mating surface 313, reinforcing rib 314, wire routing groove 315, glue storage groove 316;

[0065] Second sub-plate 320, main frame 321, mating plate 322, second mating surface 323, support rib 324;

[0066] First direction A, second direction B, third direction C;

[0067] Width L1 of the cell group in the first direction, first width L2 of the side plate, width L3 of the cavity in the first direction. Detailed implementation manners

[0068] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0069] The present application aims to at least solve the technical problems in the related art that the potting process is complex and the swelling of the battery cells cannot be improved. For this purpose, the present application provides a battery, an electrical device and a side plate, which can reduce the risk of lithium deposition due to swelling during charging and discharging of the battery cells, thereby reducing the possibility of deformation of the battery cells.

[0070] Reference is made below to Figures 1-11 describe the battery according to the embodiments of the present application.

[0071] As Figure 1 and Figure 2 shown, the battery 1 includes: a box body 10 and a side plate 30.

[0072] The battery 1 is mainly composed of a box body 10 and a cell group 20. The box body 10 is responsible for forming a closed cavity 110 for accommodating and protecting the cell group 20. The cell group 20 is installed in the cavity 110 of the box body 10 and is formed by stacking a plurality of cells 210 in the first direction A, which can maximize the energy density of the battery 1 while maintaining the structural compactness.

[0073] The side panel 30 is installed in the cavity 110 and is clamped between the side beam 120 of the box body 10 and the side of the battery cell group 20 along the first direction A, and is used to fill the gap between the battery cell group 20 and the side beam 120. The side panel 30 is composed of a first sub-panel 310 and a second sub-panel 320. The first sub-panel 310 can be connected to the side of the battery cell group 20 along the first direction A by gluing into a whole, and the second sub-panel 320 can be movable. The first sub-panel 310 and the second sub-panel 320 have a wedge-shaped mating surface on one side facing each other, and the mating surface extends obliquely toward the first direction A along the second direction B, and the second direction B intersects with the first direction A. When the first sub-panel 310 and the second sub-panel 320 move along the second direction B, the width of the side panel 30 can be adjusted by changing the tightness of the fit between the two.

[0074] During the assembly process, the first sub-board 310 and the second sub-board 320 are first formed into a whole by partial gluing. After the side panel 30 and the battery cell group 20 are installed in the cavity 110, the connection between the first sub-board 310 and the second sub-board 320 is removed to allow the second sub-board 320 to move. At this time, the first sub-board 310 and the second sub-board 320 are located in the second matching position, and the width of the side panel 30 is the smallest, that is, the first sub-board 310 and the battery cell group 20 are tightly abutted against the side surface along the first direction A, and there is a gap between the second sub-board 320 and the side beam 120 of the box body 10. Then, pressure along the second direction B is applied to the second sub-board 320. Under the action of the inclined surface, the second sub-board 320 moves along the second direction B and the first direction A at the same time. At the same time, the gap between the second sub-plate 320 and the side beam 120 of the box body 10 decreases with the movement of the second sub-plate 320, that is, the width of the side plate 30 increases with the movement of the second sub-plate 320 until the gap disappears, and the second sub-plate 320 is tightly abutted against the side beam 120 of the box body 10. At this time, the assembly is completed, the first sub-plate 310 and the second sub-plate 320 are located in the first matching position, and the width of the side plate 30 is the largest. In the first matching position, the battery cell group 20 can be subjected to the resistance from the side beam 120 of the box body 10 during the charge and discharge expansion process, thereby reducing the risk of lithium plating of the battery cell 210, and can also ensure the stability of the battery cell group 20 in the cavity 110, and prevent the battery cell group 20 from shaking or displacement during operation.

[0075] In the related art, when the battery 1 module is placed inside the tray, assembly gaps need to be left on the large surfaces on both sides of the module and filled with glue. However, the glue filling process is complicated and takes a long time. In addition, it is difficult to control the size of the assembly gap. During the glue filling process, glue is easily overflowed and the battery cell 210 cannot be prevented from expanding. The present application forms a gapless assembly on the outermost side of the large surface of the battery cell group 20 through a wedge-shaped component, which can evenly distribute the force on the large surface of the battery cell group 20, reduce the risk of expansion and lithium precipitation of the battery cell 210 during charging and discharging, thereby reducing the possibility of deformation of the battery cell 210 and improving the cycle life of the battery cell 210.

[0076] According to the battery 1 provided by the embodiments of the present application, the side plate 30 structure is composed of a first sub-plate 310 and a second sub-plate 320, and mating surfaces with wedge-shaped fit are provided on the sides of the first sub-plate 310 and the second sub-plate 320 facing each other. By adjusting the mating positions of the first sub-plate 310 and the second sub-plate 320, the overall width of the side plate 30 can be changed, realizing stable fixation and flexible adjustment of the battery cell group 20 in the cavity 110, thereby reducing the risk of deformation of the battery cell 210.

[0077] In some embodiments, as Figure 3 and Figure 5 shown, the width L1 of the battery cell group 20 in the first direction A and the sum of the first widths L2 of the two side plates 30 on the side of the battery cell group 20 are not greater than the width L3 of the cavity 110 in the first direction A. The first width L2 of the side plate 30 is the width when the first sub-plate 310 and the second sub-plate 320 are in the second mating position, and the width of the side plate 30 is the smallest when the first sub-plate 310 and the second sub-plate 320 are in the second mating position.

[0078] The first width L2 of the side plate 30 on the side of the battery cell group 20, that is, the width of the side plate 30 on the side of the battery cell group 20 when the first sub-plate 310 and the second sub-plate 320 are in the second mating position. The width of the side plate 30 is the smallest when the first sub-plate 310 and the second sub-plate 320 are in the second mating position. The sum of the width L1 of the battery cell group 20 in the first direction A and the first widths L2 of the two side plates 30 on the side of the battery cell group 20 is not greater than the width L3 of the cavity 110 in the first direction A, that is, the total width of the battery cell group 20 and the side plate 30 is not greater than the width of the cavity 110 in the first direction A. The battery cell group 20 and the side plate 30 can be safely placed in the cavity 110 without causing interference or extrusion.

[0079] When the battery cell group 20 and the side plate 30 are installed in the cavity 110, the first sub-plate 310 and the second sub-plate 320 are in the second mating position, and the width of the side plate 30 reaches the minimum, which can minimize the space required for the battery cell group 20 and the side plate 30, thus facilitating installation. The side plate 30 is composed of the first sub-plate 310 and the second sub-plate 320. During the assembly process, the first sub-plate 310 and the second sub-plate 320 are connected into a whole by locally using glue or other temporary fixing methods for easy assembly.

[0080] After the battery cell group 20 and the side plate 30 are safely placed in the cavity 110, the connection between the first sub-plate 310 and the second sub-plate 320 is removed, and the second sub-plate 320 can be moved in the first direction A and the second direction B as needed to adjust the width of the side plate 30 and the contact tightness between the side plate 30 and the battery cell group 20 and the side beam 120 of the box body 10.

[0081] It can be understood that by forming the side plate 30 structure with the first sub-plate 310 and the second sub-plate 320, it can ensure that the battery cell group 20 and the side plate 30 are safely placed and fixed in the cavity 110. At the same time, the relative displacement between the first sub-plate 310 and the second sub-plate 320 can adjust the width of the side plate 30, enabling the battery cell group 20 to be flexibly adjusted within the cavity 110.

[0082] In some embodiments, as Figure 6 and Figure 7 shown, the first sub-plate 310 includes multiple groups of first mating surfaces 313 distributed along the second direction B, and the second sub-plate 320 includes multiple groups of second mating surfaces 323 distributed along the second direction B. The multiple groups of first mating surfaces 313 and the multiple groups of second mating surfaces 323 correspond to each other one by one.

[0083] The first sub-plate 310 has multiple groups of first mating surfaces 313 distributed along the second direction B. Correspondingly, the second sub-plate 320 also has multiple groups of second mating surfaces 323 distributed along the second direction B. The second mating surfaces 323 and the first mating surfaces 313 on the first sub-plate 310 correspond to each other one by one. That is, when the first sub-plate 310 cooperates with the second sub-plate 320, there are multiple contact points and multiple mating regions. During the cooperation process, each group of first mating surfaces 313 can find the corresponding second mating surfaces 323 for cooperation.

[0084] The one-to-one correspondence between the multiple groups of first mating surfaces 313 and the multiple groups of second mating surfaces 323 can ensure the accuracy and reliability of the cooperation. During the cooperation process, the multiple groups of first mating surfaces 313 and the multiple groups of second mating surfaces 323 will contact and cooperate with each other in a predetermined manner, thus forming a stable overall structure.

[0085] The first mating surfaces 313 and the second mating surfaces 323 are distributed along the second direction B and are in one-to-one correspondence in terms of quantity, which can improve the stability of the side plate 30 structure and the accuracy during the cooperation process. At the same time, when the battery cell group 20 or the box body 10 is subjected to external impact or vibration, the side plate 30 can maintain its structural integrity and effectively prevent the displacement or damage of the battery cell group 20.

[0086] It can be understood that the design of multiple groups of mating surfaces can make the cooperation between the first sub-plate 310 and the second sub-plate 320 more reliable, while improving the overall stability and accuracy of the side plate 30.

[0087] In some embodiments, as Figure 6 shown, the height of a group of second mating surfaces 323 at the end along the second direction B among the multiple groups of second mating surfaces 323 is less than the corresponding first mating surfaces 313 along the second direction B.

[0088] Among multiple groups of second mating surfaces 323, a group of mating surfaces located at the end along the second direction B has a special height feature, that is, the height of the second mating surface 323 at the end is less than the corresponding first mating surface 313. During the mating process, there is a height difference between the corresponding first mating surface 313 and the second mating surface 323, and the two do not come into complete contact.

[0089] Before the start of assembly, a group of second mating surfaces 323 at the end along the second direction B is flush with the corresponding first mating surface 313. When the assembly starts, the height of a group of second mating surfaces 323 at the end along the second direction B is always less than the corresponding first mating surface 313 along the second direction B, and the height of the first mating surface 313 remains unchanged. The height of a group of second mating surfaces 323 at the end along the second direction B gradually decreases along the second direction B.

[0090] It can be understood that the height of a group of second mating surfaces 323 at the end along the second direction B is less than the corresponding first mating surface 313, which can adjust the tightness and facilitate the mating between the first sub-board 310 and the second sub-board 320.

[0091] In some embodiments, as Figure 6 shown, the height of the second sub-board 320 along the second direction B is less than the height of the first sub-board 310 along the second direction B.

[0092] The height of the second sub-board 320 along the second direction B is less than that of the first sub-board 310. This height difference is relative to the overall height of the first sub-board 310 and the second sub-board 320, and is not limited to only the first mating surface 313 and the second mating surface 323. The first sub-board 310 is fixed, and the second sub-board 320 can move or adjust relative to the first sub-board 310 during the mating process, which can enable the side plate 30 to achieve better adaptability between battery cell groups 20 of different sizes and the box body 10. At the same time, when the battery cell group 20 and the side plate 30 are integrally placed into the cavity 110, the lower height of the second sub-board 320 can reduce the interference between the side plate 30 and the side beam 120 of the box body 10 or other components, thereby improving the installation convenience.

[0093] It can be understood that the height of the second sub-board 320 along the second direction B is less than the height of the first sub-board 310 along the second direction B, which can optimize the mating mechanism of the side plate 30 and improve the structural stability.

[0094] In some embodiments, as Figure 6 shown, when the first sub-board 310 and the second sub-board 320 are in the first mating position, one end of the second sub-board 320 along the second aspect is lower than the corresponding end of the first sub-board 310 along the second aspect to form a pit 301, and the pit 301 is filled with glue.

[0095] The first mating position is the state of the first sub-board 310 and the second sub-board 320 after assembly. At this time, the first mating surface 313 and the second mating surface 323 do not fully contact, the width of the side board 30 is the largest, the first sub-board 310 abuts against the side surface of the battery cell group 20 along the first direction A, and the second sub-board 320 abuts against the side beam 120 of the box body 10.

[0096] At the first mating position, one end of the second sub-board 320 along the second direction B is lower than the corresponding end of the first sub-board 310 along the second direction B. The height difference forms a concave pit 301 between the first sub-board 310 and the second sub-board 320. The concave pit 301 can be filled with glue for connecting the first sub-board 310 and the second sub-board 320, so that the first sub-board 310 and the second sub-board 320 form the overall structure of the side board 30, thereby fixing the second sub-board 320. Filling the concave pit 301 with glue can also seal the gap between the first sub-board 310 and the second sub-board 320, protecting the interior of the battery 1 from moisture or dust.

[0097] It can be understood that when the first sub-board 310 and the second sub-board 320 are in the first mating position, by forming a concave pit 301 at one end of the second sub-board 320 along the second direction B and filling it with glue, the connection between the first sub-board 310 and the second sub-board 320 can be strengthened, thereby improving the stability and reliability of the entire side board 30 structure.

[0098] In some embodiments, such as Figure 6 and Figure 7 as shown, the mating surfaces of the first sub-board 310 and the second sub-board 320 facing each other are provided with teeth so that the mating surfaces of the first sub-board 310 and the second sub-board 320 facing each other can bite.

[0099] On the mating surfaces of the first sub-board 310 and the second sub-board 320 facing each other, a tooth-like structure can be provided. The tooth-like structure has protrusions and depressions, which are arranged according to a certain rule so that they can bite each other during the mating process. The long side of a single tooth-like structure can be 1 mm, and the short side can be 0.5 mm. After the second sub-board 320 moves into place, the tooth-like structures of the first sub-board 310 and the second sub-board 320 can bite smoothly and form a good connection.

[0100] It can be understood that the tooth-like structure can enhance the connection strength between the first sub-board 310 and the second sub-board 320 through the biting action, make the first sub-board 310 and the second sub-board 320 fit more closely together to form a stable overall structure, thereby improving the stability and adaptability of the side board 30 structure and reducing the risk of loosening or damage caused by vibration or impact.

[0101] In some embodiments, such as Figure 8As shown, the side plate 30 includes a plurality of second sub-plates 320 corresponding to the first sub-plates 310 , and the plurality of second sub-plates 320 are distributed along a third direction C. The third direction C, the second direction B and the first direction A intersect each other.

[0102] The side panel 30 is composed of a first sub-panel 310 and a plurality of second sub-panels 320 corresponding to the first sub-panel 310. The plurality of second sub-panels 320 are distributed along a third direction C and cooperate with the first sub-panel 310 to achieve sealing of the gap between the battery cell group 20 and the side beam 120 of the box body 10. The third direction C, the second direction B and the first direction A intersect each other in three-dimensional space and are perpendicular to each other. The first direction A is the stacking direction of the battery cell 210 from one end to the other, that is, the width direction of the battery cell 210. The second direction B intersects with the first direction A and is the height direction of the battery cell 210. The third direction C intersects with both of the first two directions and is the length direction of the battery cell 210. It is also the distribution direction of the plurality of second sub-panels 320 inside the side panel 30.

[0103] It can be understood that, through the cooperation of the first sub-board 310 and the multiple second sub-boards 320, the side panel 30 can firmly fix the battery cell group 20 to prevent it from moving in the cavity 110, and can also adapt to the needs of battery cell groups 20 of different sizes. By adjusting the positions of the multiple second sub-boards 320, battery cell groups 20 of different sizes can be matched.

[0104] In some embodiments, Figure 9 As shown, the first sub-board 310 includes a bottom board 311 and a first protrusion 312 .

[0105] The first protrusion 312 is disposed on a side of the bottom plate 311 facing the second sub-plate 320 , and a first mating surface 313 is disposed on a side of the first protrusion 312 facing away from the bottom plate 311 .

[0106] The bottom plate 311 is the base part of the first sub-plate 310 and is used to provide a stable supporting surface. The bottom plate 311 usually has sufficient strength and rigidity to withstand the pressure and other external forces from the battery cell group 20 and the side plate 30. The first protrusion 312 is arranged on the side of the bottom plate 311 facing the second sub-plate 320. It is an extension of the bottom plate 311 and protrudes in the direction of the second sub-plate 320. The first protrusion 312 is provided with a first mating surface 313 on the side away from the bottom plate 311, which can form a good fit with the second sub-plate 320. The first mating surface 313 is also provided with a tooth structure, which is used to form a bite fit with the tooth structure on the second sub-plate 320, which can enhance the connection strength between the first sub-plate 310 and the second sub-plate 320.

[0107] It can be understood that the first sub-board 310 is composed of a bottom board 311 and a first protrusion 312, and a first mating surface 313 is provided on the side of the first protrusion 312 facing away from the bottom board 311, which can enable the first sub-board 310 to be closely fitted with the second sub-board 320 to form a stable side board 30 structure.

[0108] In some embodiments, as Figure 9 shown, the first protrusion 312 includes a plurality of spaced-apart ones, and the orthographic projections of two adjacent first protrusions 312 along the third direction C have an overlapping area. The third direction C, the second direction B, and the first direction A intersect pairwise. This distribution method can increase the contact area and engagement points between the first sub-board 310 and the second sub-board 320, thereby improving the connection strength and stability between the first sub-board 310 and the second sub-board 320.

[0109] The orthographic projections of two adjacent first protrusions 312 along the third direction C have an overlapping area, that is, a plurality of first protrusions 312 are spaced apart along the third direction C. When observed from the third direction C, two adjacent first protrusions 312 will partially overlap on the plane, but do not completely coincide.

[0110] The third direction C, the second direction B, and the first direction A intersect pairwise in three-dimensional space, jointly defining the coordinate system of the battery 1. The first direction A is the stacking direction of the battery cell group 20 and also the width direction of the battery cell 210. The second direction B is perpendicular to the first direction A and is the length direction of the battery cell 210. The third direction C is the direction in which a plurality of first protrusions 312 are distributed and is perpendicular to the first direction A and the second direction B respectively.

[0111] A plurality of first protrusions 312 are spaced apart along the third direction C, which can increase the number of contact points between the first sub-board 310 and the second sub-board 320, make the contact and engagement between the first sub-board 310 and the second sub-board 320 closer, help to disperse and resist external forces from different directions, and thus enhance the connection strength of the entire side board 30 structure.

[0112] It can be understood that the first protrusion 312 includes a plurality of spaced-apart ones, and the orthographic projections of two adjacent first protrusions 312 along the third direction C have an overlapping area, which can enhance the connection strength and stability between the first sub-board 310 and the second sub-board 320.

[0113] In some embodiments, as Figure 9 shown, the first sub-board 310 further includes: a reinforcing rib 314, which is provided on the side of the bottom board 311 facing away from the battery cell group 20, and the first protrusion 312 is connected to at least a part of the reinforcing rib 314.

[0114] The reinforcing rib 314 is an element designed in a structural member to enhance its rigidity and strength. Providing the reinforcing rib 314 in the first sub-plate 310 can improve the bearing capacity of the bottom plate 311 and prevent it from being deformed or damaged when subjected to external forces.

[0115] The reinforcing rib 314 is arranged on the side of the bottom plate 311 away from the battery cell group 20, that is, the side where the first sub-plate 310 contacts the second sub-plate 320, which facilitates the layout and fixation of the battery cell group 20 and the first sub-plate 310, and can effectively enhance the overall strength of the bottom plate 311. The first protrusion 312 and the reinforcing rib 314 are arranged on the same side of the first sub-plate 310, and the first protrusion 312 is connected to at least part of the reinforcing rib 314. When the first protrusion 312 is subjected to external force, it can transfer part of the load to the reinforcing rib 314, thereby dispersing the stress and reducing the deformation of the bottom plate 311.

[0116] The extension directions of the reinforcing ribs 314 on the bottom plate 311 are various. A portion of the reinforcing ribs 314 extends along the second direction B, and another portion of the reinforcing ribs 314 extends along the third direction C. The reinforcing ribs 314 extending along the second direction B can enhance the stability of the bottom plate 311 in the third direction C, and the reinforcing ribs 314 extending along the third direction C can enhance the rigidity and strength of the bottom plate 311 in the third direction C.

[0117] The provision of the reinforcing ribs 314 also helps to optimize the stress distribution on the first sub-plate 310. When subjected to external forces, the reinforcing ribs 314 can guide the stress to flow to stronger structural parts, thereby reducing stress concentration and damage risks in weak links.

[0118] It can be understood that, through the close connection and synergy between the reinforcing rib 314, the first protrusion 312 and the bottom plate 311, the overall stability of the first sub-plate 310 is significantly improved, which not only helps to reduce the movement or shaking of the battery cell group 20 inside the battery 1 module, but also can resist the impact of external shocks and vibrations on the battery 1 module.

[0119] In some embodiments, Figure 10 As shown, the second sub-board 320 includes: a main frame 321 and a matching board 322 .

[0120] The matching plate 322 is disposed on a side of the frame facing the first sub-plate 310 , and a second matching surface 323 is disposed on a side of the matching plate 322 facing the first sub-plate 310 .

[0121] The main frame 321 is the base part of the second sub-board 320 and can provide a stable supporting structure. The main frame 321 can withstand the pressure and other external forces from the battery cell group 20 and the first sub-board 310. The mating plate 322 is an extension of the main frame 321 and is arranged on the side of the main frame 321 facing the first sub-board 310. A second mating surface 323 is provided on the side facing the first sub-board 310, and the second mating surface 323 is mated with the first mating surface 313 of the first sub-board 310 to achieve tight connection and fixation.

[0122] The first protrusion 312 of the first sub-plate 310 is provided with a first mating surface 313, and the mating plate 322 of the second sub-plate 320 is provided with a second mating surface 323. The two mating surfaces can form a bite fit, which helps to enhance the connection strength between the first sub-plate 310 and the second sub-plate 320. When subjected to external force, the main frame 321 of the second sub-plate 320 can also disperse stress and reduce stress concentration on the mating plate 322, which helps to reduce the risk of deformation or damage of the mating plate 322 and extend the service life of the second sub-plate 320.

[0123] It can be understood that the second sub-panel 320 can be closely matched with the first sub-panel 310 through the main frame 321 and the matching plate 322 to form a stable side panel 30 structure. At the same time, the main frame 321 can provide stable support and stress dispersion for the matching plate 322, and further enhance the overall performance of the second sub-panel 320.

[0124] In some embodiments, Figure 11 As shown, a supporting rib 324 is provided on the back of the matching plate 322 , and the supporting rib 324 is connected to the main frame 321 .

[0125] As a reinforcing member, the support rib 324 can significantly improve the bearing capacity and rigidity of the mating plate 322 and its surrounding structures, and prevent deformation or damage caused by external forces. When subjected to stress, the support rib 324 can also disperse the stress to a wider area, reduce local stress concentration, and improve the overall stability and durability of the structure.

[0126] The support ribs 324 are connected to the main frame 321 to form a stable support system, ensuring that the matching plate 322 can be firmly fixed in a predetermined position without displacement or falling off. The connection method between the support ribs 324 and the main frame 321 can be welding, bolt connection, riveting, etc.

[0127] The width of the support rib 324 along the third direction C is greater than the width of the first protrusion 312 along the third direction C. The third direction C is the direction in which the plurality of first protrusions 312 are distributed. That is, the support rib 324 has a larger cross-sectional area, which can provide a better support effect. The larger width can also increase the stiffness and load-bearing capacity of the support rib 324 and reduce the risk of failure caused by local stress concentration.

[0128] It can be understood that the support rib 324 on the back of the mating plate 322 is connected to the main frame 321, which can enhance the strength and stability of the structure, ensure that the mating plate 322 is firmly fixed in place, and at the same time, the width of the support rib 324 along the third direction C is greater than the width of the first protrusion 312 along the third direction C, which can further improve the support effect.

[0129] In some embodiments, as Figure 4 shown, a wire groove 315 or a glue storage groove 316 may be provided on a section of the first sub-plate 310 along the second direction B, or both the wire groove 315 and the glue storage groove 316 may be provided at the same time.

[0130] The wire groove 315 is a channel for arranging and fixing wires, mainly used to protect the wires from external mechanical damage, while keeping the wires arranged in an orderly manner, reducing electromagnetic interference and signal crosstalk. The wire groove 315 is provided on a section of the first sub-plate 310 along the second direction B to maximize space utilization and avoid interference with other components.

[0131] The glue storage groove 316 is a groove for storing adhesives. The main purpose is to accurately apply the adhesive at a specific position during the assembly process to achieve firm adhesion between components. The glue storage groove 316 is also provided on a section of the first sub-plate 310 along the second direction B.

[0132] It can be understood that by providing the wire groove 315 or the glue storage groove 316 on a section of the first sub-plate 310 along the second direction B, firm adhesion between components can be achieved while keeping the circuit clean and orderly.

[0133] The embodiment of the present application also provides an electrical device.

[0134] The electrical device includes a battery 1, and the battery 1 is used to provide electrical energy for the electrical device.

[0135] The electrical device uses the integrated battery 1 as the energy source. The electrical device is a broad concept and can be, but is not limited to, mobile phones, tablets, laptop computers, electric vehicles, ships, etc., covering from simple portable electronic devices to complex household appliances and industrial equipment.

[0136] The battery 1 is one of the core components of the electrical device, responsible for converting chemical energy into electrical energy to provide a continuous and stable power supply for the device. Compared with a fixed power source, the battery 1 has higher portability, enabling the electrical device to work independently without an external power source.

[0137] It can be understood that the electrical device integrates the battery 1 as an energy source to drive its internal working mechanism or perform specific functions.

[0138] The embodiments of the present application will be specifically described below.

[0139] The embodiments of the present application provide a side plate 30, and the side plate 30 is applied to the battery 1.

[0140] The side plate 30 includes a first sub - plate 310 and a second sub - plate 320. When assembled, the two sub - plates face each other and are tightly connected through a specific mating surface. At the same time, the sides of the first sub - plate 310 and the second sub - plate 320 facing each other have mating surfaces with wedge - shaped fits. The wedge - shaped fit mainly achieves tight connection through shape complementarity, which can provide a larger contact area and stronger locking force, thus ensuring a firm connection between the first sub - plate 310 and the second sub - plate 320.

[0141] The mating surface extends obliquely along the second direction B towards the first direction A. During the assembly process, the first sub - plate 310 and the second sub - plate 320 can gradually approach and fit tightly, while also reducing the risk of damage caused by direct collision. The inclined design also helps to form a stable locking structure after assembly, reducing the relative movement between the first sub - plate 310 and the second sub - plate 320.

[0142] The second direction B intersects with the first direction A. The widths of the side plate 30 at different mating positions of the first sub - plate 310 and the second sub - plate 320 along the second direction B are different. The design of the width change helps to further improve the adaptability and stability of the side plate 30. During the assembly process, as the first sub - plate 310 and the second sub - plate 320 gradually approach, the width of the side plate 30 will change accordingly to ensure a tight fit between the side plate 30 and the battery 1, while also improving the anti - deformation ability of the side plate 30 to prevent deformation or damage due to external forces during the use of the battery 1.

[0143] During the assembly process, the first sub-board 310 and the second sub-board 320 are first integrally formed by partial gluing. After the side plate 30 and the battery cell group 20 are both installed in the cavity 110, the connection between the first sub-board 310 and the second sub-board 320 is removed, enabling the second sub-board 320 to move. At this time, the first sub-board 310 and the second sub-board 320 are in the second mating position, where the width of the side plate 30 is the smallest, that is, the first sub-board 310 is in close contact with the side surface of the battery cell group 20 along the first direction A, and there is a gap between the second sub-board 320 and the side beam 120 of the box body 10. Then, a pressure along the second direction B is applied to the second sub-board 320. Under the action of the inclined plane, the second sub-board 320 moves simultaneously along the second direction B and the first direction A. At the same time, the gap between the second sub-board 320 and the side beam 120 of the box body 10 decreases as the second sub-board 320 moves, that is, the width of the side plate 30 increases as the second sub-board 320 moves until the gap disappears and the second sub-board 320 is in close contact with the side beam 120 of the box body 10. At this time, the assembly is completed, and the first sub-board 310 and the second sub-board 320 are in the first mating position, where the width of the side plate 30 is the largest. In the first mating position, during the charging and discharging expansion process of the battery cell group 20, it can receive the resistance from the side beam 120 of the box body 10, thereby reducing the risk of lithium plating of the battery cell 210. It can also ensure the stability of the battery cell group 20 in the cavity 110 and prevent the battery cell group 20 from shaking or displacing during operation.

[0144] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described here. The objects distinguished by "first", "second", etc. are generally of the same type and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / ", generally represents an "or" relationship between the associated objects before and after.

[0145] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0146] In the description of the present application, the "first feature" and the "second feature" may include one or more of such features.

[0147] In the description of the present application, the meaning of "a plurality" is two or more.

[0148] In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0149] In the description of the present application, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0150] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0151] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that: include: A box body, forming a cavity; A battery cell group, installed in the cavity, comprising a plurality of battery cells stacked along a first direction; A side panel is installed in the cavity and clamped between the side beam of the box and the side of the battery cell group along the first direction, the side panel includes a first sub-panel and a second sub-panel, the first sub-panel and the second sub-panel have wedge-shaped mating surfaces on one side facing each other, the mating surfaces extend obliquely toward the first direction along the second direction, and the second direction intersects with the first direction; when the first sub-panel and the second sub-panel are in the first mating position, the first sub-panel abuts against the side of the battery cell group along the first direction, and the second sub-panel abuts against the side beam of the box.

2. The battery according to claim 1, characterized in that The sum of the width of the battery cell group along the first direction and the first width of the side panel on the side of the battery cell group is not greater than the width of the cavity along the first direction, the first width is the width when the first sub-panel and the second sub-panel are in the second mating position, and the width of the side panel is the smallest when the first sub-panel and the second sub-panel are in the second mating position.

3. The battery according to claim 1, characterized in that The first sub-board includes a plurality of groups of first mating surfaces distributed along the second direction, and the second sub-board includes a plurality of groups of second mating surfaces distributed along the second direction, and the plurality of groups of first mating surfaces correspond to the plurality of groups of second mating surfaces one by one.

4. The battery according to claim 3, characterized in that A group of the plurality of groups of second matching surfaces along the end portion along the second direction has a height along the second direction smaller than the corresponding first matching surface.

5. The battery according to claim 1, characterized in that A height of the second sub-board along the second direction is smaller than a height of the first sub-board along the second direction.

6. The battery according to claim 5, characterized in that When the first sub-board and the second sub-board are in the first mating position, one end of the second sub-board along the second aspect is lower than the corresponding end of the first sub-board along the second aspect to form a pit, and the pit is filled with glue.

7. The battery according to claim 1, characterized in that The mating surfaces of the first sub-board and the second sub-board facing each other are provided with teeth, so that the mating surfaces of the first sub-board and the second sub-board facing each other are engaged with each other.

8. The battery according to any one of claims 1 to 7, characterized in that The side panel includes a plurality of the second sub-panels corresponding to the first sub-panels, the plurality of the second sub-panels are distributed along a third direction, and the third direction, the second direction and the first direction intersect in pairs.

9. The battery according to any one of claims 1 to 7, characterized in that The first sub-board comprises: Base plate; A first protrusion is arranged on a side of the bottom plate facing the second sub-plate, and a first matching surface is arranged on a side of the first protrusion facing away from the bottom plate.

10. The battery according to claim 9, characterized in that The first protrusions include a plurality of first protrusions that are spaced apart and distributed, and the orthographic projections of two adjacent first protrusions along the third direction have an overlapping area, and the third direction, the second direction and the first direction intersect each other.

11. The battery according to claim 9, characterized in that The first sub-board further includes: a reinforcing rib, which is arranged on a side of the bottom board away from the battery cell group, and the first protrusion is connected to at least a part of the reinforcing rib.

12. The battery according to any one of claims 1 to 7, characterized in that: The second sub-board comprises: Main frame; The matching plate is arranged on a side of the frame facing the first sub-plate, and a second matching surface is arranged on a side of the matching plate facing the first sub-plate.

13. The battery according to claim 12, characterized in that The back of the matching plate is provided with supporting ribs, and the supporting ribs are connected to the main frame.

14. The battery according to any one of claims 1 to 7, characterized in that A wiring groove is provided on a section of the first sub-board along the second direction; and / or, A section of the first sub-plate along the second direction is provided with a glue storage groove.

15. An electrical device, characterized in that: include: The battery according to any one of claims 1 to 14, wherein the battery is used to provide electrical energy to the electrical device.

16. A side plate, applied to a battery, characterized in that: include: A first sub-board and a second sub-board, the first sub-board and the second sub-board have wedge-shaped mating surfaces on one side facing each other, the mating surfaces extend obliquely along a second direction toward the first direction, the second direction intersects with the first direction, and the width of the side panel is different at different mating positions of the first sub-board and the second sub-board along the second direction.

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