Battery and electric device

Abstract

The utility model relates to the technical field of energy storage devices, and particularly discloses a battery and a power utilization device. The battery comprises a battery cell, a protection plate and a buffer piece, wherein a tab is arranged at the head end of the battery cell; the first side surface of the protection plate faces the head end and is provided with a device, the protection plate is provided with an electric connection part, and the electric connection part is connected with the tab; the buffer piece is arranged between the protection plate and the head end, the buffer piece is provided with an avoiding concave part, and at least part of the device is located in the avoiding concave part. According to the battery and the power utilization device provided by the invention, the buffer part can play a role in buffering and protecting devices on the protection plate, so that the overall impact resistance of the battery is improved. And meanwhile, the protection plate is vertically arranged, the buffer piece is provided with the avoiding concave part, and at least parts and devices are arranged in the avoiding concave part, so that the battery space occupied by the protection plate is effectively reduced, the space utilization rate of the battery in the length direction is improved, and the purpose of improving the battery capacity is further achieved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and more specifically, to a battery and an electrical device. Background Art

[0002] A battery generally refers to any device that generates electrical energy. Batteries are a source of energy, offering stable voltage and current, long-term power supply, minimal susceptibility to external influences, and easy charging and discharging. Therefore, they are often used to power external devices (such as mobile phones, tablets, laptops, and other portable or removable electronic devices).

[0003] Batteries typically consist of a cell and a battery protection board (PB). The PB connects the cell to external electronic devices and protects the cell. As cell energy density increases, the space occupied by the PB leads to increasing capacity loss. Reducing the space occupied by the PB within the battery has become a key goal in increasing battery capacity.

[0004] Battery structures with vertically positioned protective plates are gaining increasing attention due to their potential to increase battery capacity. These plates typically utilize a monolithic structure that encapsulates the components, resulting in a thicker, higher-quality finished product. Conventional protective plate structures with exposed components, however, pose a risk of damage to components from impact when the plate is positioned vertically, leading to lower structural reliability. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a battery and an electrical device, the structural design of which can effectively solve the problem of poor impact resistance of batteries placed upright on the protective plate.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A battery comprising:

[0008] A battery cell, wherein the head end of the battery cell is provided with a tab;

[0009] A protective plate, wherein a first side surface of the protective plate faces the head end and is provided with a device, and an electrical connection portion is provided on the protective plate, and the electrical connection portion is connected to the tab;

[0010] A buffer component is provided between the protection plate and the head end. The buffer component is provided with a position-avoiding recess. At least part of the device is located in the position-avoiding recess.

[0011] Optionally, in the above battery, the buffer member is provided with the avoidance recesses corresponding to the components having a height greater than a preset height.

[0012] Optionally, in the above-mentioned battery, the buffer member includes an integrated gasket, the gasket is provided with a thinning portion and / or a notch, the thickness of the thinning portion is less than the thickness of the main body of the gasket, the thinning portion and the main body of the gasket form the avoidance recess, and the notch forms the avoidance recess.

[0013] Optionally, in the above battery, the buffer component includes a connecting body and a plurality of gasket units, the plurality of gasket units are respectively provided on the connecting body, and the interval between two adjacent gasket units forms the avoidance recess.

[0014] Optionally, in the above-mentioned battery, the buffer is provided with a mounting hole, a limiting member is provided in the mounting hole, the hardness of the limiting member is greater than the hardness of the buffer, and the thickness of the buffer is greater than the height of the highest component, wherein the highest component is the component with the highest height on the first side surface.

[0015] Optionally, in the above-mentioned battery, the limiting member is opposite to the electrical connection part, and the thickness of the limiting member is greater than the height difference between the highest component and the electrical connection part; or, the limiting member is opposite to the plate body of the protective plate, and the thickness of the limiting member is greater than the height difference between the highest component and the plate body.

[0016] Optionally, the above-mentioned battery further includes a covering, which includes a first section, a second section and a third section connected in sequence, the first section is arranged on the side of the tab facing the head end, the third section is arranged on the second side surface, and the part of the second section close to the third section is arranged at the first end of the protective plate, the tab includes a bent portion abutting against the part of the second section close to the first section, and the outer surface of the second section does not exceed the front of the battery cell.

[0017] Optionally, in the above battery, the tab includes a tab body and a tab adhesive portion provided outside the tab body, the head end of the tab adhesive portion is located at one end where the tab body is connected to the battery cell body, and the tail end of the tab adhesive portion is located at the bending portion.

[0018] Optionally, in the above battery, the covering member further comprises:

[0019] a fourth section connected to an end of the third section away from the second section, the fourth section being provided between the second end of the protective plate and one end of the buffer member, the outer surface of the fourth section not exceeding the back surface of the battery cell, and the second end of the protective plate being opposite to the first end of the protective plate;

[0020] a fifth section connected to an end of the fourth section away from the third section, the fifth section being provided on a surface of the buffer member facing away from the protective plate;

[0021] a sixth section connected to an end of the fifth section away from the fourth section, the sixth section being provided on a side of the tab away from the head end;

[0022] Wherein, the fifth section and the sixth section are opposite to each other and fixedly connected.

[0023] Optionally, in the above battery, a bonding portion is provided between the first section and the head end.

[0024] Optionally, in the above-mentioned battery, the width of the second section is consistent with the width of the protective plate, the first section is provided corresponding to each of the tabs, each of the first sections is connected to the second section, and the width of the first section is not greater than the width of the tab.

[0025] Optionally, in the above battery, the covering member is adhesive tape.

[0026] Optionally, in the above battery, a first end surface of the buffer is parallel to the plate body of the protective plate, a second end surface of the buffer is parallel to the first end surface, or the second end surface is inclined from one side close to the bent portion to the other side opposite thereto in a direction away from the protective plate, and a portion of the tab extends along the second end surface;

[0027] The first end surface is a surface of the buffer member facing the protection plate, and the second end surface is a surface of the buffer member facing away from the protection plate.

[0028] Optionally, in the above battery, the angle between the second end face and the first end face is no greater than 45°.

[0029] The battery provided in this application includes a battery cell, a protective plate, and a buffer. The battery cell has a tab at its tip; the protective plate has a first side surface facing the tip and provided with components, and an electrical connection portion provided on the protective plate, which is connected to the tab; and the buffer is disposed between the protective plate and the tip, and has a relief recess in the buffer, with at least a portion of the components located within the relief recess.

[0030] In the battery provided by this application, the protective plate is placed upright, and a buffer is provided in the gap between the protective plate and the battery cell. The buffer's buffering properties protect the components on the protective plate, thereby improving the battery's overall impact resistance. Furthermore, the protective plate is placed upright, and a recessed portion is provided on the buffer, with at least the components located within the recessed portion. This effectively reduces the battery space occupied by the protective plate. Furthermore, compared to the overall structure of the device and protective plate package, the thickness is reduced, thereby improving the battery's longitudinal space utilization, thereby achieving the purpose of increasing battery capacity. Furthermore, the lack of packaging simplifies the production process.

[0031] To achieve the above objectives, the present application further provides an electrical device comprising any of the above batteries. Since the above batteries have the above technical effects, the electrical device comprising the batteries should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 This is a schematic structural diagram of a battery according to a specific embodiment of the present application;

[0034] Figure 2 for Figure 1 Explosion diagram of

[0035] Figure 3 It is a structural diagram of the protection plate;

[0036] Figure 4 A partial cross-sectional schematic diagram of a battery according to a specific embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the first structure of the buffer;

[0038] Figure 6 Schematic diagram of the second structure of the buffer;

[0039] Figure 7 for Figure 6 Explosion diagram of

[0040] Figure 8 Schematic diagram of the third structure of the buffer;

[0041] Figure 9 for Figure 8 Explosion diagram of

[0042] Figure 10 for Figure 8 AA cross-sectional diagram of ;

[0043] Figure 11 Schematic diagram of the position of the bonding part;

[0044] Figure 12 Schematic diagram of the unfolded structure of the covering part;

[0045] Figure 13 is a schematic cross-sectional view of a buffer;

[0046] Figure 14 This is a schematic diagram of the back side of the connection between the battery cell and the protection board;

[0047] Figure 15 This is a front view diagram of the connection between the battery cell and the protection board;

[0048] Figure 16 This is a schematic diagram of the back of the protective plate when it is folded for the first time;

[0049] Figure 17 This is a front view of the protective plate when it is folded for the first time;

[0050] Figure 18 Attach a schematic diagram for the buffer;

[0051] Figure 19 A schematic diagram of the back side of the cover;

[0052] Figure 20 A schematic front view of the cover;

[0053] Figure 21 A schematic diagram of the back side of the wrapping;

[0054] Figure 22 A front view diagram of the wrapping of the covering;

[0055] Figure 23 This is a schematic diagram of double-sided tape attachment;

[0056] Figure 24 This is a schematic diagram of the back side of the protective plate after the second folding;

[0057] Figure 25 This is a front view of the protective plate being folded for the second time;

[0058] Figure 26 for Figure 25 AA cross-sectional diagram of ;

[0059] Figure 27 for Figure 26 A magnified schematic diagram of part A;

[0060] Figure 28 Schematic diagram of the bending of the top seal part.

[0061] Reference numerals:

[0062] 100-battery core; 200-protection plate; 300-buffer; 400-covering; 500-adhesive part; 600-double-sided tape;

[0063] 110-head end; 120-tab; 130-cell body; 140-top seal; 150-front side of cell; 160-back side of cell; 170-deep pit; 121-bend; 122-tab body; 123-tab adhesive;

[0064] 210 - first side surface; 220 - device; 230 - electrical connection portion; 240 - board; 250 - second side surface; 260 - first end; 270 - second end; 221 - highest device; 222 - connector;

[0065] 301 - avoidance recess; 310 - gasket; 311 - thinning portion; 312 - notch; 320 - connection body; 330 - gasket unit; 302 - mounting hole; 340 - position limiting member; 350 - first end surface; 360 - second end surface;

[0066] 410-first paragraph; 420-second paragraph; 430-third paragraph; 440-fourth paragraph; 450-fifth paragraph; 460-sixth paragraph. DETAILED DESCRIPTION

[0067] The embodiments of the present application disclose a battery and an electrical device to increase the battery capacity while improving the battery's impact resistance.

[0068] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0069] The battery includes a cell and a protection plate. The protection plate is used to connect the cell to an external electronic device and can protect the cell. For example, when the external power source is charging the battery and the battery reaches a saturated state, the internal circuit of the protection plate will be automatically cut off, thereby avoiding overcharging. In order to improve the energy density of the battery, the protection plate is placed vertically, that is, one side surface of the protection plate faces the head end of the cell, specifically, the protection plate is parallel to the head end of the cell. In the present application, a buffer is provided between the protection plate and the head end of the cell, and the buffer is designed to avoid position according to the position and height of the device on the protection plate. While achieving the buffer protection effect, the space occupied is reduced, so that the cell can have a larger size under the same external dimensions, thereby increasing the capacity of the battery and effectively improving the endurance of the electrical device.

[0070] See also Figure 1-Figure 4In some embodiments, the battery provided in the present application includes a battery cell 100, a protective plate 200 and a buffer 300. Among them, the head end 110 of the battery cell 100 is provided with a pole tab 120. The pole tab 120 can be specifically configured as a positive pole tab and a negative pole tab electrically connected to the battery cell 100. For example, there may be two pole tabs 120, one of which is a positive pole tab and the other is a negative pole tab. Alternatively, there may be more than two pole tabs 120, for example, the head end 110 of the battery cell 100 is connected to three pole tabs 120, one of which is a positive pole tab and the other two are negative pole tabs connected in parallel.

[0071] The first side surface 210 of the protective plate 200 faces the head end 110 and is provided with a device 220. The protective plate 200 is provided with an electrical connection portion 230, which is connected to the tab 120. For ease of explanation, the two opposing sides of the protective plate 200 are referred to as the first side surface 210 and the second side surface 250, respectively. The first side surface 210 faces the head end 110 of the battery cell 100 and can be parallel, approximately parallel, or substantially parallel to the head end 110 of the battery cell 100, meaning that the protective plate 200 is positioned upright. The protective plate 200 is provided with an electrical connection portion 230, which is electrically connected to the tab 120. Specifically, the protective plate 200 includes a plate body 240, an electrical connection portion 230, and a device 220. The plate body 240 is the main structure of the protective plate 200. The plate body 240 can be a printed circuit board. For example, the plate body 240 can include a substrate, and the device 220 provided on the plate body 240 can be electrically connected via the printed circuit board on the substrate. The number of electrical connection parts 230 is set accordingly according to the number of tabs 120. The device 220 includes but is not limited to a connector 222, a fuse and a metal oxide semiconductor field effect transistor. The connector 222 is an electrical connector for electrically connecting the protection board 200 to an external electronic device. The electrical connection between the connector 222 and the protection board 200 can be specifically electrically connected through a printed circuit on the substrate. The current of the tab 120 can be connected to the connector 222 through the printed circuit, and then connected to the external electronic device through the connector 222. For example, the connector 222 can be a flexible circuit board, one end of which is electrically connected to the circuit board, and the other end of the flexible circuit board, i.e., the external connection end, is used to electrically connect to an external electronic device.

[0072] The buffer 300 is arranged between the protective plate 200 and the head end 110. The buffer 300 is provided with a avoidance recess 301, and at least part of the device 220 is located in the avoidance recess 301. That is, the buffer 300 is arranged in the gap between the protective plate 200 and the head end 110 of the battery cell 100. The buffer 300 has a buffering function and is made of a material or structure that can provide elastic buffering. Exemplarily, the buffer 300 uses a silicone pad or foam. The avoidance recess 301 is provided on the buffer 300, which is used to avoid the device 220 on the first side surface 210. The avoidance recess 301 is a recessed area on the buffer 300, and its size and shape can be set as needed, and are not specifically limited here. It can be understood that according to the different heights of different devices 220, the avoidance recess 301 can be selectively set for one of the devices 220 or several devices 220.

[0073] In the battery provided by this application, the protective plate 200 is placed upright, and a buffer member 300 is provided in the gap between the protective plate 200 and the battery cell 100. The buffering performance of the buffer member 300 protects the device 220 on the protective plate 200, thereby improving the overall impact resistance of the battery. Furthermore, the protective plate 200 is placed upright, and a relief recess 301 is provided on the buffer member 300. At least the component device 220 is disposed within the relief recess 301, effectively reducing the battery space occupied by the protective plate 200. Furthermore, compared to the overall structure in which the device 220 and the protective plate 200 are packaged, the thickness is reduced, thereby improving the space utilization of the battery in the longitudinal direction, thereby achieving the purpose of increasing the battery capacity. Furthermore, the absence of packaging simplifies the production and preparation process.

[0074] In some specific examples, the electrical connection portion 230 may be a nickel sheet. The nickel sheet and the tab 120 may be welded together by reflow soldering, laser welding, resistance welding, ultrasonic welding, or the like. It is understood that an insulating protective layer may be provided at the weld between the tab 120 and the protective plate 200 to insulate the weld and prevent short circuits.

[0075] For some specific examples, see Figure 2The battery cell 100 provided in the present application includes a battery cell body 130 and a tab 120 extending from one end of the battery cell body 130, and the end extending from the tab 120 is recorded as the head end 110, and the tab 120 is electrically connected to the battery cell body 130. Furthermore, the battery cell body 130 also includes a top seal portion 140 provided on the top end surface of the battery cell body 130 and a side seal portion provided on the side end surface of the battery cell body 130, and the top seal portion 140 and the side seal portion play a protective role for the battery cell body 130. In some specific examples, the top seal portion 140 and the side seal portion can be made of aluminum-plastic film material. When the top seal portion 140 is made of aluminum-plastic film material, the bendability of the aluminum-plastic film can be utilized to bend the top seal portion 140 toward the battery cell body 130, so that the top seal portion 140 is parallel, approximately parallel, or basically parallel to the top end surface of the battery cell body 130.

[0076] In some embodiments, the buffer member 300 covers each device 220 on the first side surface 210. Specifically, the buffer member 300 is sized to fit between each device 220 on the first side surface 210 and the head end 110 of the battery cell 100, thereby providing buffering protection for each device 220. For example, the length of the buffer member 300 is equal to or slightly less than the length of the protective plate 200, and the width of the buffer member 300 is equal to or slightly less than the width of the protective plate 200, thereby providing buffering protection for the entire protective plate 200.

[0077] In some embodiments, each device 220 is disposed on the first side surface 210 of the protective plate 200. It is understood that the connector 222 in the device 220 disposed on the first side surface 210 means that one end of the connector 222 is connected to the first side surface 210, and the other end of the connector 222 can be bent to the other side of the protective plate 200 to facilitate connection with an external electronic device. If the layout of the protective plate 200 allows, each device 220 is disposed on the first side surface 210. The buffer member 300 can provide buffering protection for each device 220 on the protective plate 200, further ensuring the battery's impact resistance.

[0078] In some embodiments, the buffer 300 is provided with a one-to-one corresponding avoidance recess 301 for each device 220 whose height is greater than the preset height. For devices 220 with a smaller height, the elasticity of the buffer 300 can be used to meet the installation avoidance and buffering requirements. For devices 220 with a larger height, the elasticity of the buffer 300 is not enough to meet the installation avoidance requirements, that is, there will be a gap between the buffer 300 and the plate body 240 of the protective plate 200, and the overall space occupancy is large, which is not conducive to the improvement of battery capacity. Therefore, for the devices 220 with a higher height on the protective plate 200, specifically for the devices 220 with a height greater than the preset height, avoidance recesses 301 are provided on the buffer 300 in a one-to-one corresponding manner. The shape and recessed depth of the avoidance recesses 301 corresponding to different devices 220 can be the same or different, and can be set according to the corresponding devices 220. As set above, the buffer 300 can better cooperate with the protective plate 200, minimize space occupancy, and ensure effective buffering. It is understandable that the specific value of the preset height can be set according to the elasticity of the buffer 300 and the height of the device 220, and is not specifically limited here.

[0079] In some embodiments, the avoidance recess 301 includes at least one of a avoidance through-hole and a avoidance groove, and the avoidance through-hole extends along the thickness direction of the buffer 300. It is understandable that the thickness direction of the buffer 300 is the distance direction between the protective plate 200 and the head end 110 of the battery cell 100. Depending on the height of the device 220, the corresponding avoidance recess 301 can adopt a avoidance through-hole, that is, a hole structure that runs through the thickness direction of the buffer 300, or a avoidance groove, that is, a groove structure that does not run through the thickness direction of the buffer 300. In the case where the buffer 300 is provided with multiple avoidance recesses 301, each avoidance recess 301 can adopt a avoidance through-hole, or a avoidance groove, or some avoidance recesses 301 can adopt avoidance through-holes and some avoidance recesses 301 can adopt avoidance grooves. For example, a avoidance through-hole is provided on the buffer 300 corresponding to the device 220 with the highest height, and a avoidance groove is provided at the portion of the connector 222 with a higher glue thickness.

[0080] In some embodiments, see Figure 5The buffer 300 provided in the present application includes an integrated gasket 310, and the gasket 310 is provided with a thinning portion 311 and / or a notch 312. The thickness of the thinning portion 311 is less than the thickness of the main body of the gasket 310. The thinning portion 311 and the main body of the gasket 310 form a avoidance recess 301, and the notch 312 forms the avoidance recess 301. The buffer 300 adopts an integrated gasket 310, which is reliable in structure and easy to process. In one way, the gasket 310 is thinned locally, that is, the gasket 310 includes a thinning portion 311 with a thickness less than that of the main body of the gasket 310, to form an avoidance groove. In another way, a notch 312 is provided on the gasket 310 to form an avoidance through hole. According to specific needs, one or two of the above-mentioned avoidance recesses 301 can be selectively provided on the buffer 300.

[0081] In other embodiments, see Figure 6-Figure 7 This embodiment differs from the previous embodiment in that the buffer 300 adopts a split structure, including a connecting body 320 and multiple gasket units 330. The connecting body 320 connects and integrates the gasket units 330. Multiple gasket units 330 are respectively arranged on the connecting body 320, and the gaps between adjacent gasket units 330 form a recessed portion 301. In other words, at least two gasket units 330 are spaced apart. It should be understood that the term "multiple" in this application refers to two or more. The number, shape, and size of the gasket units 330 can be set as needed and are not specifically limited here. When including multiple gasket units 330, the shapes of the multiple gasket units 330 can be the same or different. Using a modular buffer 300 allows for greater diversity in the shapes and combinations of the buffer 300. In some specific examples, the gasket units 330 can be silicone pads or foam, and the connecting body 320 can be double-sided tape 600, such as aramid paper or DuPont paper.

[0082] In some embodiments, see Figures 8-10The buffer 300 provided in the present application is provided with a mounting hole 302, and a stopper 340 is provided in the mounting hole 302. The hardness of the stopper 340 is greater than the hardness of the buffer 300, and the thickness δ1 of the buffer 300 is greater than the height H of the highest component 221, wherein the highest component 221 is the component 220 with the highest height on the first side surface 210. It should be noted that the thickness of the buffer 300 refers to the thickness of the main part of the buffer 300 excluding the avoidance recess 301. When the thickness of the main part changes, such as the thickness gradually increases from one end to the other end, the thickness δ1 of the buffer 300 here refers to the thickness of the thinnest part of the main part. When the thickness of the stopper 340 changes, such as the thickness gradually increases from one end to the other end, the thickness δ2 of the stopper 340 here refers to the thickness of the thickest part of the stopper 340, that is, the maximum thickness. If the buffer 300 includes the aforementioned integrated gasket 310, the thickness of the buffer 300 is the thickness of the gasket 310. If the buffer 300 includes the aforementioned connecting body 320 and the gasket unit 330, the thickness of the buffer 300 is the combined thickness of the connecting body 320 and the gasket unit 330. To prevent excessive deformation of the buffer 300 and the impact on the device 220 when subjected to compression and impact, a mounting hole 302 is provided on the buffer 300 for receiving a stopper 340. When the buffer 300 is compressed to a certain thickness, the stopper 340 activates to prevent further compression of the buffer 300. In other words, the stopper 340 limits the compression limit of the buffer 300, preventing excessive compression and protecting the device 220 on the first side surface 210 from compression and impact. For example, the thickness δ1 of the buffer 300 is greater than 0.5 cm, and the thickness δ2 of the stopper 340 is greater than 0.3 cm.

[0083] In some embodiments, the stopper 340 is positioned opposite the electrical connection portion 230, and the thickness of the stopper 340 is greater than the height difference between the highest component 221 and the electrical connection portion 230. Specifically, the location of the mounting hole 302 corresponds to the location of the tab 120, which in turn corresponds to the location of the electrical connection portion 230. There are no other components 220 surrounding the electrical connection portion 230 on the protective plate 200. Therefore, placing the stopper 340 in this position does not interfere with other components or affect other components 220. The thickness of the stopper 340 is greater than the height difference between the highest component 221 and the electrical connection portion 230. Therefore, when the buffer 300 is compressed to its maximum thickness by an impact, the stopper 340 ensures that the highest component 221 is not squeezed or impacted. Specifically, when the buffer 300 is compressed to the point where the limit block comes into effect, the impact force exerted on the protective plate 200 is directly applied to the battery head through the limit block 340. During this process, only the electrical connection part 230 of the protective plate 200 is squeezed, and no other components 220 are squeezed. Therefore, the buffer 300 can protect and buffer the protective plate 200.

[0084] In other embodiments, the stopper 340 is positioned opposite the plate 240 of the protective plate 200, and the thickness of the stopper 340 is greater than the height difference between the highest component 221 and the plate 240. Positioning the stopper 340 opposite the plate 240 on the protective plate 200 where no component 220 is located can also prevent impacts on the components 220. The specific location of the stopper 340 is selected based on the layout of the components 220 on the protective plate 200.

[0085] In some embodiments, see Figure 2-Figure 4 The battery provided in the present application also includes a covering 400, which includes a first section 410, a second section 420 and a third section 430 connected in sequence. The first section 410 is arranged on the side of the tab 120 facing the head end 110, the third section 430 is arranged on the second side surface 250, and the portion of the second section 420 close to the third section 430 is arranged at the first end 260 of the protective plate 200. The tab 120 includes a bent portion 121 that abuts against the portion of the second section 420 close to the first section 410, and the outer surface of the second section 420 does not exceed the front side 150 of the battery cell 100. As the cell 100 becomes thinner, the battery structure is limited by the minimum width of the top seal groove of the cell 100 and cannot be narrowed. The distance between the top seal edge and the surface of the cell 100 after bending is small. Although it can ensure that the tab 120 does not exceed the surface of the battery after bending, that is, it does not become too thick, the tab 120 glue is usually unable to be effectively bent during the bending process due to its high hardness. It will still warp beyond the battery surface, resulting in poor thickness and non-compliance with design specifications. Therefore, in this embodiment, a covering 400 is added to the battery head end 110. The setting of the covering 400 ensures that during the bending process of the protective plate 200, a force can be applied to the tab body 122 and the tab glue portion 123 of the tab 120, so that the tab glue portion 123 can also be effectively bent, such as being driven by the covering 400 to bend into a C shape, without warping beyond the cell body 130.

[0086] The cover 400 is specifically an integrated structure, that is, the first section 410, the second section 420, and the third section 430 are parts of the cover 400 at different positions, and the structure is reliable. If needed, the first section 410, the second section 420, and the third section 430 can also be a split structure connected by a conventional fixing method. Since the first section 410 is located on the side of the tab 120 facing the head end 110, and the third section 430 is located on the second side surface 250 of the protective plate 200, when the protective plate 200 is folded, the tab 120 is bent accordingly. Due to the force applied to the tab 120 by the cover 400, the tab 120 can be bent according to a predetermined angle and path, so that the outer surface of the second section 420 does not extend beyond the front surface 150 of the battery cell 100 after bending, that is, it is not too thick. It should be noted that the front face 150 and back face 160 of the battery cell 100 refer to the two large, opposing surfaces of the battery cell 100. The front face 150 and back face 160 are used only to distinguish their relative positions and do not define their absolute positions when the battery is in use. The front face 150 of the battery cell 100 is the front face of the battery cell body 130, and the back face 160 of the battery cell 100 is the back face of the battery cell body 130. For example, the cover 400 is attached to the deep groove 170 at the head of the battery cell 100, with the bottom of the cover 400 aligned with the top seal 140 and wrapping around the tab 120.

[0087] In some embodiments, the tab 120 includes a tab body 122 and a tab adhesive portion 123 disposed outside the tab body 122. The head end of the tab adhesive portion 123 is located at the end where the tab body 122 is connected to the battery cell body 130, and the tail end of the tab adhesive portion 123 is located at the bending portion 121. By providing the cover, the tab adhesive portion 123 can be bent, and for a battery cell 100 with a smaller thickness, it can also be ensured that the tab 120 does not become excessively thick after bending.

[0088] In some embodiments, the cover 400 provided in the present application further includes a fourth section 440, which is connected to the end of the third section 430 away from the second section 420. The fourth section 440 is provided at the second end 270 of the protective plate 200 and one end of the buffer 300. The outer surface of the fourth section 440 does not extend beyond the back surface 160 of the battery cell 100, and the second end 270 of the protective plate 200 is opposite to the first end 260 of the protective plate 200. Specifically, one end of the buffer 300 is flush with the second end 270 of the protective plate 200. When the cover 400 is a one-piece structure, that is, the third section 430 and the fourth section 440 are parts at different positions of the cover 400. As needed, the third section 430 and the fourth section 440 can also be a split structure connected by a conventional fixing method. The covering member 400 wraps around the first end 260, the second side surface 250, and the second end 270 of the protective plate 200. The longer the covering member 400 is, the more reliable the force applied to the tab 120 during bending, ensuring effective bending of the tab 120. Furthermore, the covering member 400 protects the protective plate 200 and integrates the protective plate 200 with the buffer member 300, improving the reliability of the overall structure.

[0089] In some embodiments, the covering member 400 provided in the present application further includes a fifth section 450, which is connected to the end of the fourth section 440 away from the third section 430, and the fifth section 450 is provided on the surface of the buffer member 300 facing away from the protective plate 200. The surface of the buffer member 300 facing away from the protective plate 200 is the second end surface 360 ​​of the buffer member 300. When the covering member 400 is an integral structure, the fourth section 440 and the fifth section 450 are parts at different positions of the covering member 400. As needed, the fourth section 440 and the fifth section 450 can also be a split structure connected in a conventional fixing manner. The further extension of the length of the covering member 400 makes the force applied to the tab 120 more reliable during bending. At the same time, the covering member 400 can better integrate the protective plate 200 and the buffer member 300 into a whole.

[0090] In some embodiments, the cover 400 provided herein further includes a sixth segment 460, which is connected to the end of the fifth segment 450 away from the fourth segment 440. The sixth segment 460 is disposed on the side of the tab 120 facing away from the head end 110. The fifth segment 450 and the sixth segment 460 are opposed to each other and fixedly connected. When the cover 400 is a one-piece structure, the fifth segment 450 and the sixth segment 460 are located at different locations of the cover 400. As needed, the fifth segment 450 and the sixth segment 460 may also be separate structures connected using conventional fixing methods. The sixth section 460 is located on the side of the tab 120 facing away from the head end 110, and the two ends of the covering member 400 are respectively connected to the two sides of the tab 120, that is, the first section 410 is connected to the side of the tab 120 facing the head end 110, and the sixth section 460 is connected to the side of the tab 120 facing away from the head end 110. Therefore, during bending, the force applied to the tab 120 is more stable and reliable. Under the action of the covering member 400, the tab 120 is guaranteed to bend according to the predetermined angle and path. Furthermore, the sixth section 460 is located on the side of the tab 120 facing away from the head end 110 and on the back of the top seal portion 140. The fifth section 450 and the sixth section 460 are opposite and fixedly connected, so that after bending, the first side surface 210 of the protective plate 200 faces the head end 110 of the battery cell 100, so that the protective plate 200 is placed upright and the overall battery structure is stable and reliable. Exemplarily, the fifth section 450 and the sixth section 460 are fixed by double-sided tape 600 .

[0091] In some embodiments, see Figure 4 and Figure 11 A bonding portion 500 is provided between the first section 410 and the head end 110. After being bent into position, the bonding portion 500 securely connects the first section 410 and the head end 110, ensuring a stable and secure battery structure and ensuring the protective plate 200 is securely and stably positioned upright. Exemplarily, the bonding portion 500 is a glue-dispensing portion. That is, after being bent into position, the first section 410 and the head end 110 are securely connected by glue-dispensing.

[0092] In some embodiments, see Figure 12 The width of the second section 420 is consistent with the width of the protection plate 200. A first section 410 is provided corresponding to each tab 120. Each first section 410 is connected to the second section 420. The width of the first section 410 is no greater than the width of the tab 120. The cover 400 is provided with a protrusion, which is the first section 410 mentioned above. By setting the first section 410 as a protrusion protruding from the second section 420, the first section 410 corresponds to the tab 120, thereby applying a force to the tab 120 and being able to avoid the top seal portion 140.

[0093] In some embodiments, the covering member 400 is adhesive tape. The adhesive tape can facilitate the bending of the tab 120 and directly bond to the tab 120, protective plate 200, and buffer 300, resulting in reliable connection, easy operation, and a simple structure. In other embodiments, the covering member 400 can also be made of other materials such as film, and can be fixedly connected to the corresponding tab 120, protective plate 200, or buffer 300 through adsorption, bonding, or other methods.

[0094] In some embodiments, see Figure 13 The first end surface 350 of the buffer member 300 is parallel to the plate body 240 of the protective plate 200. The second end surface 360 ​​of the buffer member 300 is inclined from the side closest to the bent portion 121 to the opposite side, away from the protective plate 200. Part of the tab 120 extends along the second end surface 360. The first end surface 350 is the surface of the buffer member 300 facing the protective plate 200, and the second end surface 360 ​​is the surface of the buffer member 300 facing away from the protective plate 200. The second end surface 360 ​​of the buffer member 300 is inclined, and the inclination angle of the second end surface 360 ​​is adjusted according to the combination of battery cells 100 of different thicknesses and protective plates 200 of different widths, thereby ensuring that the thickness of the battery head does not exceed the thickness of the battery body.

[0095] Specifically, the angle between the second end face 360 ​​and the first end face 350 is no greater than 45°. As described above, the steep inclination of the second end face 360 ​​ensures that the thickness of the battery head does not exceed the thickness of the battery body while minimizing the space occupied by the buffer member 300 along the length of the battery, thereby increasing the battery capacity.

[0096] In other embodiments, the first end surface 350 of the buffer member 300 may be parallel to the plate body 240 of the protection plate 200 , and the second end surface 360 ​​of the buffer member 300 may be parallel to the first end surface 350 .

[0097] For example, the cross section of the buffer 300 is trapezoidal, and the two sides of the trapezoid correspond to the first end face 350 and the second end face 360. Figure 13 As shown, one side of the trapezoid corresponding to the first end surface 350 is perpendicular to the upper and lower bases of the trapezoid, and the angle ∠A between one side of the trapezoid corresponding to the second end surface 360 ​​and the lower base is greater than or equal to 45° and less than 90°. When ∠A is 90°, the cross-section of the buffer 300 is rectangular.

[0098] In other embodiments, the cross section of the buffer 300 may be rectangular, triangular, concave, elliptical, or irregularly curved, etc. The longitudinal section of the buffer 300 may be concave or convex in various shapes, such as rectangular, triangular, concave, elliptical, or irregularly curved, etc.

[0099] The present application provides a battery assembly method, comprising the following steps:

[0100] S1: electrically connecting the tab 120 of the battery cell 100 to the electrical connection portion 230 on the protection plate 200 .

[0101] See also Figure 14-15 The electrical connection portion 230 is provided on the side of the tab 120 facing the back of the battery cell 100 . Specifically, the electrical connection portion 230 can be welded to the tab 120 .

[0102] S2: Folding the protection plate 200 for the first time so that the first side surface 210 of the protection plate 200 faces the back surface 160 of the battery cell 100;

[0103] See also Figure 16-17 Through the first folding of the protection plate 200 , the electrical connection portion 230 is bent so that the first side surface 210 of the protection plate 200 and the back surface 160 of the battery cell 100 face the same direction.

[0104] S3 : attaching the buffer member 300 to the first side surface 210 of the protection plate 200 , and inserting the device 220 on the first side surface 210 into the corresponding avoidance recess 301 .

[0105] See also Figure 18 A buffer member 300 is attached to the first side surface 210 to protect and buffer the device 220 on the protection plate 200 .

[0106] S4: Lay the covering member 400 flat, and connect the first section 410 of the covering member 400 to the side of the tab 120 facing the front of the battery cell 100 .

[0107] See also Figure 19-20 For example, the covering 400 is attached to the deep pit 170 at the head of the battery cell 100, and the bottom of the first section 410 is aligned with the top seal 140, wrapping the tab glue part 123 of the tab 120 to ensure that the tab glue part 123 is driven to bend by the covering 400 during the bending process of the protection plate 200, and the super-battery cell body 130 will not be warped.

[0108] S5: Wrap the third section 430 of the covering member 400 around the second side surface 250 of the protective plate 200, wrap the fourth section 440 around the second end 270 of the protective plate 200 and one end of the buffer member 300, wrap the fifth section 450 around the surface of the buffer member 300 facing away from the protective plate 200, and wrap the sixth section 460 around the side of the tab 120 facing the back of the battery cell 100;

[0109] See also Figure 21-22For example, the covering 400 is wrapped around the protective plate 200 from the second side surface 250 to the back of the battery. Specifically, the sixth section 460 of the covering 400 is wrapped around the side of the tab 120 facing the back of the battery cell 100 and the back of the top seal 140.

[0110] S6: attaching double-sided tape 600 to the surface of the sixth segment 460 .

[0111] See also Figure 23 , stick the double-sided tape 600 on the back of the sixth section 460 .

[0112] S7: Fold the protection plate 200 a second time so that the sixth section 460 faces the fifth section 450 and adheres them with the double-sided tape 600.

[0113] See also Figure 24-27 Bend the protective plate 200 to the back of the battery. Connect the sixth section 460 to the fifth section 450 with double-sided tape 600. The protective plate 200 and the buffer member 300 are then secured to the back of the battery. At this point, the tab adhesive portion 123 is wrapped around the cover 400 into a corresponding bend, specifically a C-shape, preventing the tab 120 from curling or becoming exposed.

[0114] S8 : Fold the top sealing portion 140 so that the first side surface 210 of the protection plate 200 faces the head of the battery cell 100 .

[0115] See also Figure 28 Bend the protective plate 200 and the top seal portion 140 of the battery cell 100 counterclockwise, so that the first side surface 210 of the folded protective plate 200 faces the head of the battery cell 100. Specifically, if the cross-section of the buffer 300 is trapezoidal, the angle of the counterclockwise bend of the protective plate 200 and the top seal portion 140 of the battery cell 100 is equal to the angle ∠A between the lower base and the waist of the trapezoid corresponding to the second end surface 360. After the bend, the protective plate 200 is in an upright position.

[0116] S9: Apply glue between the sixth segment 460 and the battery cell 100 .

[0117] See also Figure 4 and Figure 11 The protection plate 200 is fixed in the current state by applying glue between the sixth section 460 and the battery cell 100 .

[0118] Based on the battery provided in the above embodiments, the present application further provides an electrical device, which includes any one of the batteries in the above embodiments. Since the electrical device uses the battery in the above embodiments, the beneficial effects of the electrical device can be referred to the above embodiments.

[0119] It is understandable that the design of the electrical device can be energy storage application or power output, or it can be compatible with the two application modes, which should all fall within the scope of the description of this application, specifically including but not limited to mobile phones, tablet computers, laptops, etc.

[0120] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0121] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery, characterized in that: include: A battery cell (100), wherein a head end (110) of the battery cell (100) is provided with a tab (120); a protective plate (200), wherein a first side surface (210) of the protective plate (200) faces the head end (110) and is provided with a device (220); an electrical connection portion (230) is provided on the protective plate (200), and the electrical connection portion (230) is connected to the tab (120); A buffer member (300) is provided between the protection plate (200) and the head end (110); the buffer member (300) is provided with a position-avoiding recess (301); at least a portion of the device (220) is located in the position-avoiding recess (301).

2. The battery according to claim 1, characterized in that The buffer member (300) corresponds one to one with each component (220) having a height greater than a preset height, and is respectively provided with the avoidance recess (301).

3. The battery according to claim 1, characterized in that The buffer component (300) includes an integrated gasket (310), the gasket (310) being provided with a thinning portion (311) and / or a notch (312), the thickness of the thinning portion (311) being less than the thickness of the main body of the gasket (310), the thinning portion (311) and the main body of the gasket (310) forming the avoidance recess (301), and the notch (312) forming the avoidance recess (301).

4. The battery according to claim 1, characterized in that The buffer component (300) comprises a connecting body (320) and a plurality of gasket monomers (330), wherein the plurality of gasket monomers (330) are respectively arranged on the connecting body (320), and the interval between two adjacent gasket monomers (330) forms the avoidance recess (301).

5. The battery according to claim 1, characterized in that The buffer (300) is provided with a mounting hole (302), and a limiting member (340) is provided in the mounting hole (302). The hardness of the limiting member (340) is greater than the hardness of the buffer (300), and the thickness of the buffer (300) is greater than the height of the highest component (221), wherein the highest component (221) is the component (220) with the highest height on the first side surface (210).

6. The battery according to claim 5, characterized in that The limiting member (340) is opposite to the electrical connection portion (230), and the thickness of the limiting member (340) is greater than the height difference between the highest component (221) and the electrical connection portion (230); or, the limiting member (340) is opposite to the plate body (240) of the protection plate (200), and the thickness of the limiting member (340) is greater than the height difference between the highest component (221) and the plate body (240).

7. The battery according to any one of claims 1 to 6, characterized in that: The battery cell (100) further comprises a covering member (400), wherein the covering member (400) comprises a first section (410), a second section (420) and a third section (430) connected in sequence, wherein the first section (410) is arranged on the side of the tab (120) facing the head end (110), the third section (430) is arranged on the second side surface (250) of the protective plate (200), a portion of the second section (420) close to the third section (430) is arranged on the first end (260) of the protective plate (200), the tab (120) comprises a bent portion (121) abutting against a portion of the second section (420) close to the first section (410), and an outer surface of the second section (420) does not extend beyond the front surface (150) of the battery cell (100).

8. The battery according to claim 7, characterized in that The tab (120) comprises a tab body (122) and a tab adhesive portion (123) disposed outside the tab body (122), wherein the tail end of the tab adhesive portion (123) is located at the bent portion (121).

9. The battery according to claim 7, characterized in that The covering member (400) further includes: a fourth section (440) connected to an end of the third section (430) away from the second section (420), the fourth section (440) being provided at the second end (270) of the protection plate (200) and one end of the buffer member (300), the outer surface of the fourth section (440) not exceeding the back surface (160) of the battery cell (100), and the second end (270) of the protection plate (200) being opposite to the first end (260) of the protection plate (200); a fifth section (450) connected to an end of the fourth section (440) away from the third section (430), the fifth section (450) being provided on a surface of the buffer member (300) facing away from the protective plate (200); a sixth section (460) connected to an end of the fifth section (450) away from the fourth section (440), the sixth section (460) being provided on a side of the tab (120) away from the head end (110); The fifth section (450) and the sixth section (460) are opposite to each other and fixedly connected.

10. The battery according to claim 7, characterized in that A bonding portion (500) is provided between the first section (410) and the head end (110).

11. The battery according to claim 7, characterized in that The width of the second section (420) is consistent with the width of the protection plate (200), and the first section (410) is respectively provided corresponding to each of the tabs (120), and each of the first sections (410) is connected to the second section (420), and the width of the first section (410) is not greater than the width of the tab (120).

12. The battery according to claim 7, characterized in that The covering piece (400) is adhesive tape.

13. The battery according to claim 7, characterized in that The first end surface (350) of the buffer member (300) is parallel to the plate body (240) of the protection plate (200), and the second end surface (360) of the buffer member (300) is parallel to the first end surface (350), or the second end surface (360) is inclined from one side close to the bending portion (121) to the other side opposite thereto in a direction away from the protection plate (200), and a portion of the tab (120) extends along the second end surface (360); The first end surface (350) is the surface of the buffer component (300) facing the protection plate (200), and the second end surface (360) is the surface of the buffer component (300) facing away from the protection plate (200).

14. The battery according to claim 13, characterized in that The included angle between the second end surface (360) and the first end surface (350) is no greater than 45°.

15. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 14.

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