Battery

Abstract

The present application provides a battery, including a cell, the cell including a cell body and a tab extending from the cell body; a shell, located at the periphery of the cell, the shell having a top seal, a side seal and at least one protrusion formed at the edge of the cell body, the top seal being bent toward the top end surface, the top end surface being the end surface along the height direction of the cell body, the protrusion being located between the top seal and the side seal, and extending toward the top end surface; a protective plate, the protective plate being located on the side of the top seal away from the top end surface, the protective plate including a first region and a second region, the height of the second region being greater than the height of the first region; the second region being connected to the tab, the second region being staggered with the protrusion along the width direction of the cell body. The battery provided according to the present application shortens the length of the wiring inside the protective plate, thereby being able to effectively reduce the resistance of the protective plate, reduce the power consumption of the protective plate, improve the utilization rate of the battery power, and thus improve the battery life.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular to a battery. Background Art

[0002] A battery is a device that can store electrical energy inside it so that it can power external devices (such as mobile phones, tablet computers, laptops, personal digital assistants and other portable or removable electronic devices) when needed.

[0003] The battery generally includes a cell, a shell located on the periphery of the cell, a protection board electrically connected to the tabs of the cell, and insulating tape. The protection board can be a printed circuit board (PCB), on which a plurality of electronic components are arranged. The main function of the protection board is to connect the cell to external electronic devices, and to protect the cell.

[0004] However, in the related art, the protective board has a large spatial size, which results in a large resistance and high power consumption of the protective board, which is not conducive to the charging and discharging of the battery and the full utilization of the battery power. Summary of the invention

[0005] The present application provides a battery to at least solve the problem of high resistance and high power consumption of the protection board in the related art, and can effectively improve the power utilization rate of the battery.

[0006] The present application provides a battery, including:

[0007] A battery cell, the battery cell comprising a battery cell body and a tab extending from the battery cell body;

[0008] The shell is located at the periphery of the battery cell, and the shell is formed with a top seal, a side seal and at least one protrusion at the edge of the battery cell body, the top seal is bent toward the top end surface, the top end surface is the end surface along the height direction of the battery cell body, and the protrusion is located between the top seal and the side seal and extends toward the top end surface;

[0009] The protective plate is located on the side of the top sealing edge away from the top end surface, and the protective plate includes a first area and a second area, the height of the second area is greater than the height of the first area; the second area is connected to the pole ear, and the second area is staggered with the protrusion along the width direction of the battery body.

[0010] In a feasible implementation manner, the first area is arranged opposite to the protruding portion.

[0011] In a feasible implementation, the protection plate includes a substrate and a packaging layer; in the second area, a plurality of electronic components are disposed on the substrate, and the packaging layer covers the plurality of electronic components.

[0012] In a feasible implementation, the height of the second area protruding from the first area is 0.8-2.0 mm.

[0013] In a feasible implementation, the second region includes a first end and a second end along the length direction; the distance between the first end and an end of the first region away from the second region is 2-15 mm.

[0014] In a feasible implementation, the height of the first region is 0.6-1.5 mm, and / or the height of the second region is 1.4-3.5 mm.

[0015] In a feasible implementation, the packaging layer of the protection plate faces the top sealing edge, and the first area covers the protruding portion, or the first area abuts against the protruding portion.

[0016] In a feasible implementation, the protrusion includes a first bending section and a second bending section;

[0017] The first bending section is attached to the top sealing edge, the second bending section is located on the side of the first bending section facing away from the top sealing edge, and the first area covers the second bending section.

[0018] In a feasible implementation, the protrusion includes a first part, a second part and a third part;

[0019] The first part is connected to the side sealing edge, the second part is connected to the first part and bent toward the top end surface, and the third part is located on the side of the second part facing away from the first part and connected to the top sealing edge.

[0020] In a feasible implementation, a height of the protruding portion is less than or equal to a height of the second region protruding from the first region.

[0021] In a feasible implementation, the packaging layer of the protection plate is arranged to face away from the top edge seal, and the protrusion is bent and arranged on a side of the first region of the protection plate away from the top edge seal.

[0022] In a feasible implementation, a height of the protruding portion is less than or equal to a height of the second region protruding from the first region.

[0023] In a feasible implementation manner, the first region and the protrusion are connected through a first insulating layer.

[0024] In a feasible implementation, there are two protrusions, which are respectively located at two ends of the top surface along the width direction;

[0025] The second area is located between the two protrusions.

[0026] In a feasible implementation, the projection of the protection plate and / or the pole ear on the plane where the top end surface is located is located inside the top end surface.

[0027] In a feasible implementation, the pole ear includes a first connecting segment and a second connecting segment, the second connecting segment is connected to the battery cell body through the first connecting segment, and at least part of the first connecting segment is located in the top sealing edge, and the second connecting segment is used to connect to the protective plate.

[0028] In a feasible implementation, the battery cell body includes a first surface and a second surface opposite to each other in a thickness direction, and the top sealing edge is bent toward the first surface;

[0029] The distance between the first connecting section near the first surface and the first surface is greater than or equal to 0.2 mm; or the distance between the first connecting section near the second surface and the second surface is greater than or equal to 0.2 mm.

[0030] In a feasible implementation, the second connecting section is located between the protection plate and the battery cell body, or the second connecting section is located on a side of the protection plate facing away from the battery cell body.

[0031] In a feasible implementation, the second connecting section is located between the protective plate and the battery cell body, and a second insulating layer is provided between the second connecting section and the top sealing edge, at least part of the second connecting section is attached to the outer surface of the top sealing edge through the second insulating layer, and at least the second area of ​​the protective plate is attached to the second insulating layer.

[0032] In a feasible implementation, a third insulating layer is attached to the side of the protection plate facing away from the battery body, at least part of the third insulating layer covers the protection plate, and another part of the third insulating layer is connected to the battery body to fix the protection plate.

[0033] In a feasible implementation, the battery further includes a temperature sensor electrically connected to the protection board;

[0034] The temperature sensing probe of the temperature sensor is located between the first area and the top sealing edge; or, the temperature sensing probe is arranged close to the protruding portion.

[0035] The battery provided in the embodiment of the present application is configured to include a first area and a second area, and the height of the second area is configured to be greater than the height of the first area. For example, multiple components can be concentrated in one area of ​​the protection plate to form a second area with a larger height. In this way, the thickness of other areas such as the first area can be thinned during production, thereby reducing the spatial size of the protection plate and shortening the length of the wiring inside the protection plate. Compared with the prior art, the resistance of the protection plate can be effectively reduced, the power consumption of the protection plate can be reduced, the utilization rate of the battery power can be improved, and the battery life can be improved. In addition, by setting a protrusion between the top seal and the side seal of the shell, and staggering the second area with a larger height on the protection plate and the protrusion in the width direction of the battery body, on the one hand, the space in other areas other than the protrusion on the top surface of the battery cell can be reasonably utilized to avoid the second area of ​​the protection plate occupying additional height space of the battery cell and increasing the height of the battery, thereby reducing the height size of the battery, so that the energy density of the battery cell can be increased when it is set. On the other hand, the distance between the second area of ​​the protection plate and the battery cell is reduced, thereby reducing the length of the pole ear used to electrically connect the second area and the battery cell, so that the resistance and power consumption between the second area of ​​the protection plate and the battery cell are reduced, which is more conducive to the charging and discharging of the battery and the full utilization of the battery power.

[0036] Advantages of additional aspects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] Figure 1 is a schematic diagram of an exploded structure of an electronic device provided in an embodiment of the present application;

[0039] Figure 2 is a structural schematic diagram of a battery provided in an embodiment of the present application;

[0040] Figure 3 This is a schematic diagram of the structure of the battery cell and the shell in the battery provided in the embodiment of the present application;

[0041] Figure 4 This is another structural schematic diagram of the cooperation between the battery cell and the shell in the battery provided in the embodiment of the present application;

[0042] Figure 5This is another structural schematic diagram of the cooperation between the battery cell and the shell in the battery provided in the embodiment of the present application;

[0043] Figure 6 yes Figure 5 A local enlarged schematic diagram of the middle A;

[0044] Figure 7 is a top view of the protection plate provided in an embodiment of the present application;

[0045] Figure 8 is a side view of a protection plate provided in an embodiment of the present application;

[0046] Fig. 9 is another top view of the protection plate provided in the embodiment of the present application;

[0047] Fig.10 is another side view of the protection plate provided in the embodiment of the present application;

[0048] Fig.11 yes Figure 2 A partial enlarged view of point B in the middle;

[0049] Fig.12 It is a partial enlarged view of a protrusion of a battery shell provided in an embodiment of the present application;

[0050] Fig.13 is another partial enlarged view of the protrusion of the shell of the battery provided in the embodiment of the present application;

[0051] Fig.14 This is another partial enlarged view of the protrusion of the battery shell provided in the embodiment of the present application;

[0052] Fig.15 This is a structural schematic diagram of the connection between the protection plate and the tab in the battery provided in the embodiment of the present application;

[0053] Fig.16 This is another structural schematic diagram of the connection between the protection plate and the tab in the battery provided in the embodiment of the present application;

[0054] Fig.17 This is another structural schematic diagram of the connection between the protection plate and the tab in the battery provided in the embodiment of the present application;

[0055] Fig.18 This is another structural schematic diagram of the connection between the protection plate and the tab in the battery provided in the embodiment of the present application;

[0056] Fig.19 This is another structural schematic diagram of the cooperation between the battery cell and the shell in the battery provided in the embodiment of the present application;

[0057] Fig. 20is another structural schematic diagram of a battery provided in an embodiment of the present application;

[0058] Fig.21 yes Figure 2 Partial schematic diagram of point C in the middle.

[0059] Description of reference numerals:

[0060] 10-Electronic equipment;

[0061] 100-display screen; 200-housing; 300-battery;

[0062] 300a-battery core; 310-battery core body; 320-ear; 330-protection plate; 340-housing; 350-second insulating layer; 360-third insulating layer; 370-temperature sensor; 380-flexible circuit board;

[0063] 311-top surface; 312-side surface; 321-first connecting section; 322-second connecting section; 330a-first area; 330b-second area; 331-substrate; 332-encapsulation layer; 333-nickel sheet; 341-protrusion; 342-recess; 343-top sealing edge; 344-side sealing edge; 345-extension portion; 350a-compressible medium;

[0064] 3311-electronic component; 3411-first bending section; 3412-second bending section; 3413-first part; 3414-second part; 3415-third part; 343a-main body; 343b-end;

[0065] 371-temperature sensor; 372-wire. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0067] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0068] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the description of this application, it should be understood that the terms "inside", "outside", "upper", "bottom", "front", "back" and the like indicate directions or positional relationships (if any) based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0071] With the development of electronic information technology, electronic devices have gradually become an inseparable part of people's daily life and work. Among them, portable electronic devices (such as mobile phones, tablet computers, notebook computers, and personal digital assistants, etc.) are deeply loved by people due to their portability.

[0072] Figure 1 It is a schematic diagram of the exploded structure of an electronic device provided in an embodiment of the present application.

[0073] Reference Figure 1 As shown, the embodiment of the present application provides an electronic device 10, wherein the electronic device 10 may be a portable electronic device 10 such as the aforementioned mobile phone, tablet computer, notebook computer or personal digital assistant. For ease of understanding, in the embodiment of the present application, the electronic device 10 is described as a mobile phone as a specific example.

[0074] Reference Figure 1As shown, the electronic device 10 includes a display screen 100, a housing 200, and electronic components disposed in the housing 200, wherein the electronic components disposed in the housing 200 may specifically be electronic components such as a processor, a storage, a camera, a microphone, and a speaker. It is understood that other electronic components may also be disposed in the electronic device 10, which will not be described one by one in the embodiments of the present application.

[0075] These electronic components consume power when they are working, for example, the display screen 100 displays video, images, or text information, or the processor processes and executes received operation signals, or the speaker plays audio signals, etc. That is, when a user uses the portable electronic device 10, power is consumed.

[0076] Reference Figure 1 As shown, to meet the use of the portable electronic device 10, the electronic device 10 generally further includes a battery 300. The battery 300 can be disposed inside the housing 200 of the electronic device 10 and provide the electrical energy required for the operation of various electronic components inside the electronic device 10.

[0077] It can be understood that the battery 300 can be connected to the electronic device 10 in a detachable manner. For example, a back cover is provided on the rear side of the housing 200 of the electronic device 10 (specifically, it can be the side facing away from the display screen 100), and the back cover is detachably connected to the housing 200. The battery 300 can be installed to the electronic device 10 through the opened back cover.

[0078] Of course, in some optional examples, in order to improve the portability of the electronic device 10, the battery 300 may also be directly built into the housing 200 of the electronic device 10. That is, when the electronic device 10 is produced, the battery 300 may be directly packaged inside the housing 200 of the electronic device 10, so that, on the one hand, the portability of the electronic device 10 can be improved, and on the other hand, the stability of the electrical connection between the battery 300 and the electronic device 10 can also be improved.

[0079] Figure 2 It is a structural schematic diagram of a battery provided in an embodiment of the present application.

[0080] Reference Figure 2 As shown, the embodiment of the present application provides a battery 300, including a battery cell 300a, which can be an aluminum shell battery cell, a soft pack battery cell or a cylindrical battery cell, etc. In some specific examples, for example, when the electronic device 10 is a mobile phone, the battery cell 300a can be an aluminum shell battery cell, and when the electronic device 10 is a laptop computer, the battery cell 300a can be a cylindrical battery cell.

[0081] Figure 3This is a schematic diagram of the structure of the battery cell and the shell in the battery provided in the embodiment of the present application. Figure 4 This is another structural schematic diagram of the cooperation between the battery cell and the shell in the battery provided in the embodiment of the present application.

[0082] Reference Figure 3 and Figure 4 As shown, in practice, one end of the battery cell 300a is connected to a tab 320. Specifically, the battery cell 300a may include a battery cell body 310 and a tab 320 extending from one end of the battery cell body 310, and the tab 320 is electrically connected to the battery cell body 310. Among them, the positive tab 320 and the negative tab 320 are electrically connected to the battery cell body 310. For example, the tab 320 may have two (for example Figure 3 ), one of which is the positive electrode tab 320 and the other is the negative electrode tab 320.

[0083] Alternatively, the tab 320 may have more than two tabs (eg Figure 4 ), for example, one end of the battery body 310 is connected to three tabs 320, one of which is a positive tab 320, and the other two are parallel negative tabs 320. Of course, one of them can be a negative tab 320, and the other two can be parallel positive tabs 320, which is not limited in the present embodiment. Generally, a battery cell 300a having more than two tabs 320 is referred to as a multi-tab battery cell.

[0084] Figure 5 is another structural schematic diagram of the cooperation between the battery cell and the shell in the battery provided in the embodiment of the present application, Figure 6 yes Figure 5 A local enlarged schematic diagram of point A in the middle.

[0085] Reference Figure 4-Figure 6 As shown, in an optional design, the battery 300 further includes a shell 340 , and the shell 340 is located on the periphery of the battery cell body 310 .

[0086] It is understandable that, usually, the battery cell body 310 cannot be used directly, and the outer periphery of the battery cell body 310 is covered / wrapped with a shell 340. In some specific examples, the shell 340 can be made of an aluminum-plastic film material, wherein the aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, and electrolyte resistance stability, etc., and is often used as the shell 340 of the battery 300.

[0087] Continue to refer to Figures 3 to 6In an optional example of the present application, the shell 340 is formed with a top seal 343, a side seal 344 and a protrusion 341 at the edge of the battery cell 300a, and the top seal 343 is bent toward the top end surface 311 of the battery cell body 310, for example, the top seal 343 can be attached to the top end surface 311 of the battery cell body 310, and the side seal 344 can be bent toward the side end surface 312 of the battery cell body 310, for example, the side seal 344 can be attached to the side end surface 312 of the battery cell body 310, and the top seal 343 and the side seal 344 are perpendicular to each other.

[0088] As described in detail in the above embodiment, the top sealing edge 343 and the side sealing edge 344 are both made of aluminum-plastic film. In specific configuration, the bendability of the aluminum-plastic film can be utilized to fold / bend the top sealing edge 343 90 degrees toward the direction of the battery cell body 310, so that the top sealing edge 343 is parallel, approximately parallel, or substantially parallel to the top end surface 311 of the battery cell body 310 (i.e., the end surface of the battery cell body 310 along the positive direction of the y-axis).

[0089] In some specific examples, after the top sealing edge 343 is folded 90 degrees, the top sealing edge 343 can be fixed between the top sealing edge 343 and the top end surface 311 by dispensing glue.

[0090] Of course, in some examples, an insulating tape may be attached to the top surface 311 of the battery cell body 310 , and then the top sealing edge 343 may be folded and attached to the insulating tape, so as to fix the top sealing edge 343 .

[0091] Reference Figure 5 As shown, it can be understood that the side sealing edge 344 is located in the width direction of the battery cell 300a (refer to Figure 5 The battery cell 300a has two side end faces 312 opposite to each other (in the direction indicated by x in the figure), that is, there are two side seal edges 344, one of which is located at one end of the top seal edge 343, and the other of which is located at the other end of the top seal edge 343. For example, the side seal edge 344 located on the left side of the battery cell 300a can be attached to the side end face 312 on the left side of the battery cell body 310, and one end of the side seal edge 344 along the y direction is connected to the left end of the top seal edge 343, and the side seal edge 344 located on the right side of the battery cell 300a can be attached to the side end face 313 on the right side of the battery cell body 310, and one end of the side seal edge 344 along the y direction is connected to the right end of the top seal edge 343.

[0092] The side seal 344 can also be folded toward the direction of the battery cell 300a by utilizing the bendable property of the aluminum-plastic film, so that the side seal 344 is attached to the side end surface 312 of the battery cell body 310. Of course, the side seal 344 and the side end surface 312 of the battery cell body 310 can also be pasted and fixed by an adhesive layer.

[0093] Reference Figure 5 As shown, in the embodiment of the present application, after the top seal 343 is attached to the top end surface 311 of the battery cell body 310 and the side seal 344 is attached to the side end surface 312 of the battery cell body 310, the space required for the battery 300 to be occupied inside the electronic device 10 is reduced. In other words, when the same installation space is provided in the electronic device 10, a larger battery 300 can be installed, thereby increasing the volume of the battery cell body 310 of the battery cell 300a. In other words, the capacity of the battery 300 can be increased, which can effectively improve the battery life of the electronic device 10.

[0094] Reference Figure 5 and Figure 6 As shown, it should be noted that the top surface 311 of the battery cell body 310 is the top surface 311 of the battery cell body 310 along the height direction (for example Figure 5 or Figure 6 The end surface of the battery cell 310 along the width direction (for example, the direction indicated by y in FIG. 1 ), one end of the pole ear 320 extends to the top end surface 311. The side end surface 312 of the battery cell refers to the side end surface of the battery cell body 310 along the width direction (for example, Figure 5 or Figure 6 Two end faces opposite to each other (in the direction indicated by x).

[0095] Reference Figure 6 As shown, it can be understood that the projection of the top sealing edge along the y direction on the battery cell of the embodiment of the present application is located on the top end surface 311 , and the projection of the side sealing edge along the x direction on the battery cell is located on the side end surface 312 .

[0096] Reference Figure 5 and Figure 6 As shown, the protrusion 341 is located between the top sealing edge and the side sealing edge, and extends toward the top end surface 311. The protrusion 341 is higher than the top end surface 311 and extends out of the top sealing edge and the side sealing edge.

[0097] There may be one protrusion 341 (not shown), which is located at one end of the top surface 311 along the width direction and between one end of the top sealing edge 343 along the width direction and the side sealing edge 344 .

[0098] Of course, refer to Figure 5 As shown, in some examples, there may be two protrusions 341, and the two protrusions 341 are respectively located at the top surface 311 along the width direction (refer to Figure 5 At two ends of the top sealing edge 343 (in the direction indicated by x), one of the protrusions 341 is located between one end (for example, the left end) of the top sealing edge 343 along the width direction and the side sealing edge 344, and the other protrusion 341 is located between one end (for example, the right end) of the top sealing edge 343 along the width direction and the side sealing edge 344.

[0099] Figure 7is a top view of the protection plate provided in the embodiment of the present application, Figure 8 This is a side view of the protection plate provided in an embodiment of the present application.

[0100] Reference Figure 2 , Figure 7 and Figure 8 As shown, the battery 300 provided in the embodiment of the present application further includes a protection plate 330, which is located on the side of the top sealing edge 343 facing away from the top end surface 311. The protection plate 330 is electrically connected to the cell body 310311 of the cell 300a through the tab 320.

[0101] Specifically, in the embodiment of the present application, the tab 320 can be connected to the terminal of the protection plate 330. In some specific examples, the terminal of the protection plate 330 can be a nickel sheet 333 (refer to Figure 8 The tab 320 and the nickel sheet 333 may be welded by laser welding, resistance welding, ultrasonic welding, or the like.

[0102] It can be understood that an insulating protective layer may be provided at the welding point between the pole ear 320 and the protection plate 330 to insulate the welding point so as to avoid a short circuit.

[0103] Reference Figure 7 and Figure 8 As shown, the protection board 330 can be made of printed circuit boards (PCB). For example, the protection board 330 may include a substrate 331 and a plurality of electronic components 3311 disposed on the substrate 331. The plurality of electronic components 3311 are electrically connected through the printed circuit on the substrate 331. The plurality of electronic components 3311 may include capacitors, resistors, MOS switches, IC circuits, etc.

[0104] It is understandable that the main function of the protection board 330 is to connect the battery cell 300a with the external electronic device, and to protect the battery cell 300a. For example, when the external power source charges the battery 300 and the battery 300 reaches a saturated state, the internal circuit of the protection board 330 will be automatically cut off, thereby avoiding overcharging.

[0105] Reference Figure 7 and Figure 8 As shown, exemplarily, the electrical connector for electrically connecting the protection board 330 with the external electronic device can be a flexible circuit board 380, one end of which is electrically connected to some electronic components 3311 of the protection board 330, and the other end of the flexible circuit board 380 is used to electrically connect to the external electronic device.

[0106] Of course, the protection board 330 also has other functions, such as protecting the battery 300 from over-discharge. When the battery 300 is over-discharged, the discharge circuit on the protection board will be automatically cut off to ensure that the battery 300 is not completely discharged. Of course, it can also ensure the stability of the internal current of the battery 300 to avoid overheating of the battery 300 during discharge.

[0107] In addition, in some examples, the protection board 330 can also isolate the multiple batteries 300 to avoid short circuits.

[0108] Fig. 9 is another top view of the protection plate provided in the embodiment of the present application, Fig.10 is another side view of the protection plate provided in the embodiment of the present application. Fig. 9 and Fig.10 As shown, the protection plate 330 may include a first region 330 a and a second region 330 b , and a height of the second region 330 b is greater than a height of the first region 330 a .

[0109] It should be noted that the height of the first region 330a refers to the height of the first region 330a of the protection plate along the height direction (for example Fig.10 The distance between the two sides of the direction shown in y in the figure can be found in Fig.10 Accordingly, the height of the second region 330b refers to the height of the second region 330b of the protection plate along the height direction (eg Fig.10 The distance between the two sides of the direction shown in y in the figure can be found in Fig.10 As shown in d2.

[0110] The first region 330a is a thinning region, and the second region 330b is a thickening region. Figure 7 As shown, in the specific setting, multiple electronic components 3311 can be concentrated in one area of ​​the protection plate 330 to form a second area 330b with a larger height, so that the second area 330b is a thickened area. In other words, in the second area 330b of the protection plate 330, multiple electronic components 3311 are arranged on the substrate 331. In this way, the thickness of other areas such as the first area 330a can be thinned during production, thereby reducing the spatial size of the protection plate 330, thereby shortening the length of the wiring in the protection plate 330. Compared with the prior art, the resistance of the protection plate 330 can be effectively reduced, the power consumption of the protection plate 330 can be reduced, and the utilization rate of the battery 300 is improved, thereby improving the battery life of the battery 300.

[0111] Reference Figure 8 As shown, in some examples, the plurality of electronic components 3311 of the protection plate 330 may be located on one side of the protection plate 330. For example, the plurality of electronic components 3311 are generally disposed on one surface of the substrate 331 (eg Figure 8 The second area 330b is the area of ​​the protective plate 330 with the electronic components 3311, and the first area 330a is the area of ​​the protective plate 330 without the electronic components 3311, so that the second area 330b is higher than the first area 330a.

[0112] In this example, another surface of the substrate 331 (eg Figure 8 The lower surface of the middle substrate 331 , that is, the surface of the side of the protection plate 330 facing away from the electronic component 3311 , is a plane.

[0113] Of course, in other examples, electronic components 3311 may be provided in the second area 330b on both sides of the protective plate 330 along the y direction. For example, multiple electronic components 3311 may be provided on the upper surface and the lower surface of the substrate 331. In this way, a "convex" shaped structure is formed on both sides of the protective plate 330 along the height direction, that is, there are protruding structures on both surfaces of the substrate 331, and the entire protective plate 330 forms a "cross" shaped structure.

[0114] Reference Fig.10 As shown, in some examples, the second area 330b may be located in the middle area of ​​the protection plate 330, and correspondingly, the first area 330a is located in the edge area of ​​the protection plate 330, that is, the first area 330a is located in the second area 330b along the length direction of the protection plate 330 (refer to Fig.10 on both sides of the direction indicated by x).

[0115] For example, the protection plate 330 includes two first regions 330a and a second region 330b located between the two first regions 330a, that is, there is a certain distance between any end of the second region 330b along the length direction and the end of the protection plate 330 located on the same side (refer to Fig.10 For example, there is a certain distance L between the left end of the second region 330b and the left end of the protection plate 330, and the distance L is equal to the length of the first region 330a on the left side of the second region 330b.

[0116] Accordingly, there is a certain distance L between the right end of the second region 330 b and the right end of the protection plate 330 , and the distance L is equal to the length of the first region 330 a on the right side of the second region 330 b .

[0117] In some other examples, the second region 330b may also be located at an edge region of the protection plate 330 along the length direction.

[0118] For example, the second area 330b may be located at the left edge area of ​​the protection plate 330, and correspondingly, the first area 330a is located at the right edge area of ​​the protection plate 330. That is, the protection plate 330 is Fig.10 330a) are the second area 330b and the first area 330a, wherein the left end of the second area 330b is flush with the left end of the protection plate 330, that is, the distance L between the left end of the second area 330b and the left end of the protection plate 330 is zero, and the distance L between the right end of the second area 330b and the right end of the protection plate 330 is equal to the length of the first area 330a. It can be understood that the right end of the first area 330a is flush with the right end of the protection plate 330.

[0119] For another example, the second area 330b may be located at the right edge area of ​​the protection plate 330, and correspondingly, the first area 330a is located at the left edge area of ​​the protection plate 330, that is, the protection plate 330 is Fig.10 The first region 330a and the second region 330b are arranged in the direction indicated by x in the figure, wherein the right end of the second region 330b is flush with the right end of the protection plate 330, that is, the distance L between the left end of the second region 330b and the left end of the protection plate 330 is equal to the length of the first region 330a. It can be understood that the left end of the first region 330a is flush with the left end of the protection plate 330.

[0120] The embodiment of the present application does not limit the position of the second area 330b, and can be adjusted according to actual needs.

[0121] Fig.11 yes Figure 2 A partial enlarged view of point B in the middle. Figure 2 and Fig.11 As shown, the second region 330b of the protection plate 330 and the protrusion 341 are in the width direction of the battery cell body 310 (refer to Fig.11 That is to say, the projection of the second region 330b on the battery cell body 310 along the y direction is staggered with the protrusion 341.

[0122] For example, the protrusion 341 is located at the left end of the cell body 310 along the width direction, and the projection of the second area 330b of the protection plate 330 on the cell body 310 along the y direction is located at any area on the right side of the protrusion 341, such as the middle area of ​​the top surface 311 of the cell body 310. Alternatively, the protrusion 341 is located at the right end of the cell body 310 along the width direction, and the projection of the second area 330b on the cell body 310 along the y direction is located at any area on the left side of the protrusion 341, such as the central area of ​​the top surface 311 of the cell body 310.

[0123] Reference Figure 5and Fig.11 As shown, it can be understood that a recessed position 342 can be formed between the protrusion 341 and the top sealing edge 343, and the recessed position 342 is located on one side of the protrusion 341 along the width direction of the battery cell body 310, such as the middle area of ​​the top sealing edge 343 facing away from the top end surface 311.

[0124] By staggering the second area 330b and the protrusion 341 in the width direction of the battery cell body 310, the space in other areas on the top surface 311 other than the protrusion 341 can be reasonably utilized. For example, the second area 330b can be set in the recessed position 342 formed on one side of the protrusion 341 to avoid the second area 330b of the protection plate 330 occupying the height space of the battery cell 300a and increasing the height of the battery, thereby reducing the height dimension of the battery 300, so that the energy density of the battery cell 300a can be increased when it is set. On the other hand, the distance between the second area 330b of the protection plate 330 and the battery cell body 310 is reduced, thereby reducing the length of the pole ear 320 for electrically connecting the second area 330b and the battery cell 300a, so that the resistance and power consumption between the second area 330b of the protection plate 330 and the battery cell body 310 are reduced, which is more conducive to the charging and discharging of the battery 300 and the full utilization of the battery power.

[0125] Reference Figure 2 As shown, the second area 330b of the protection plate 330 is connected to the tab 320, for example, the electronic component 3311 on the second area 330b is electrically connected to the tab 320, so that the electronic component 3311 on the protection plate 330 is electrically connected to the battery body 310.

[0126] Continue to refer to Fig.11 As shown, in some examples, the first region 330a may be arranged opposite to the protrusion 341, that is, the projections of the first region 330a and the protrusion 341 in the y direction have an overlapping area, for example, the projection area of ​​the first region 330a along the y direction on the battery cell body 310 overlaps with the projection area of ​​the protrusion 341 on the battery cell body 310.

[0127] Reference Fig.11 As shown, exemplarily, at least a portion of the first region 330a may be located on the side of the protrusion 341 facing away from the battery cell body 310, so that the surface of the first region 330a may be fixed on the protrusion 341, thereby improving the stability of the protection plate 330 on the top end surface 311 of the battery cell body 310, thereby ensuring the reliability of the electrical connection between the protection plate 330 and the tab 320.

[0128] Usually, after packaging, each electronic component 3311 on the protection board 330 is connected to the printed circuit on the protection board 330 by spot welding or soldering to realize the function of each electronic component 3311. Of course, in some possible examples, each electronic component 3311 may be packaged separately after being connected to the circuit on the protection board 330. After packaging, each electronic component 3311 can be protected. In addition, each electronic component 3311 is isolated from each other to avoid interference.

[0129] However, after each electronic component 3311 is individually packaged, the volume of each electronic component 3311 is relatively large, and the space required by the electronic component 3311 on the protection board 330 is relatively large. In this way, the overall size of the protection board 330 needs to be larger to accommodate all the electronic components 3311. The larger battery 300 board protection board leads to longer edges of the printed circuit on the battery 300 board protection board, and the protection board 330 has a large resistance and high power consumption, which is not conducive to the charging and discharging of the battery 300, nor is it conducive to the full utilization of the battery 300 power.

[0130] Reference Figure 8 and Fig.10 As shown, in view of this, the protection board 330 of the embodiment of the present application may also include a packaging layer 332, and the packaging layer 332 covers a plurality of electronic components 3311. For example, after the electronic components 3311 are connected to the circuit on the substrate 331, the electronic components 3311 are covered by the packaging layer 332. In this way, the packaging layer 332 forms an integral package for at least part of the electronic components 3311 covered by it, which can reduce the volume required for the individual packaging of each electronic component 3311. In other words, the size of the protection board 330 can be reduced, so that the circuit on the protection board 330 is shorter, and the resistance and power consumption of the protection board 330 can be reduced, which is beneficial to the charging and discharging of the battery 300. In addition, when the battery 300 is discharged, the resistance of the protection board 330 is smaller, which is also more conducive to the full utilization of the power of the battery 300, thereby improving the energy utilization rate.

[0131] Reference Figure 8 and Fig.10 As shown, illustratively, the electronic components 3311 of the protection plate 330 are all located on one surface of the substrate 331 (eg Figure 8The upper surface of the substrate 331 in the middle), the encapsulation layer 332 covers the outer surface of the module formed by all the electronic components 3311. Among them, the electronic components 3311 and the encapsulation layer 332 are located in the second area 330b of the protection plate 330, that is, the second area 330b of the protection plate 330 has a substrate 331, a plurality of electronic components 3311 located on the substrate 331, and the encapsulation layer 332 covering the electronic components 3311. The height of the second area 330b can be the distance between the surface of the substrate 331 facing away from the electronic components 3311 and the surface of the encapsulation layer 332 facing away from the electronic components 3311. For details, please refer to Fig.10 The height of the first region 330a is the distance between the two side surfaces of the substrate 331. Fig.10 As shown in d1.

[0132] In practice, the substrate 331 may be a PCB. In some possible examples, the substrate 331 may also be an integrated circuit board. When the substrate 331 is a PCB, the substrate 331 may be a 4-layer board, an 8-layer board, a 12-layer board, or a 16-layer board. It should be noted that in the embodiments of the present application, the number of layers of the substrate 331 is only used as some specific examples for illustrative purposes, and does not limit the specific number of layers of the substrate 331.

[0133] Among them, the multiple electronic components 3311 arranged on the substrate 331 may have different functions, such as the electronic components 3311 on the charging protection circuit for protecting the charging process, or the electronic components 3311 on the discharge circuit for protecting the discharge process, etc. For example, electronic components 3311 such as flexible circuits, control chips (ICs), field effect transistors (MOSs), or some capacitors and resistors. Of course, there may also be electronic components 3311 with other functions on the substrate 331, which will not be described one by one in the embodiments of the present application.

[0134] Reference Fig.10 As shown, in the embodiment of the present application, a system-in-a-package (SIP) can be used to cover and package multiple electronic components 3311. It should be noted that since the electronic components 3311 protrude from the surface of the substrate 331, when the multiple electronic components 3311 are covered and packaged, the packaging layer 332 also protrudes from the surface of the substrate 331.

[0135] It should be noted that, in the embodiment of the present application, the packaging layer 332 protrudes from one of the surfaces of the substrate 331. That is to say, in the embodiment of the present application, when the electronic components 3311 on the substrate 331 are packaged using SIP, at least part of the electronic components 3311 on one of the surfaces can be packaged, and then at least part of the electronic components 3311 on the other surface of the substrate 331 can be packaged.

[0136] In some specific examples, the encapsulation layer 332 may be a plastic sealant.

[0137] It is understandable that, in some possible examples, the substrate 331 and the electronic components 3311 on the substrate 331 may be packaged together using SIP, that is, the packaging layer 332 covers and packages the entire substrate 331 and the electronic components 3311 on the substrate 331 .

[0138] The multiple electronic components 3311 on the substrate 331 are encapsulated as a whole by the encapsulation layer 332, that is, the multiple electronic components 3311 do not need to be individually encapsulated. In other words, the multiple electronic components 3311 are encapsulated as a whole by the encapsulation layer 332, which can save the space occupied by each electronic component 3311 for individual encapsulation, and can reduce the space occupied by the multiple electronic components 3311 on the substrate 331, which can also reduce the space occupied by the substrate 331, thereby shortening the length of the wiring on the substrate 331. Compared with the prior art, it is possible to reduce the space required for the substrate 331, shorten the length of the wiring on the substrate 331, thereby effectively reducing the resistance of the protection board 330, reducing the power consumption of the protection board 330, and improving the utilization rate of the battery 300, thereby improving the battery life of the battery 300.

[0139] In addition, the packaging layer 332 covers the area formed by the multiple electronic components 3311 to form a complete packaging body. In this way, the packaging layer 332 covers the substrate 331 as a whole, which can strengthen the substrate 331 to a certain extent, that is, it can improve the mechanical strength of the substrate 331.

[0140] It can be understood that the area formed by the plurality of electronic components 3311 is covered by the encapsulation layer 332, so that the encapsulation layer 332 can evenly conduct the heat generated by the electronic components 3311, that is, the plurality of electronic components 3311 are covered and encapsulated by the encapsulation layer 332, so that the protection plate 330 has good heat uniformity. Of course, the anti-interference and anti-corrosion properties of the protection plate 330 are improved to a certain extent.

[0141] It should be noted that, usually, the electronic component 3311 of the protection plate 330 is connected to the surface of the substrate 331, that is, the electronic component 3311 protrudes relative to the surface of the substrate 331. In order to completely encapsulate the electronic component 3311, the electronic component 3311 is well protected.

[0142] Reference Fig.10 As shown, in a specific configuration, the height of the second area 330b protruding from the first area 330a may be 0.8-2.0 mm. Fig.10In the corresponding example, that is, multiple electronic components 3311 and the packaging layer 332 are located on one surface of the substrate 331, and the multiple electronic components 3311 and the packaging layer 332 are located in the second area 330b of the protection plate 330, then the height of the packaging layer 332 protruding from the substrate 331 is 0.8-2.0mm.

[0143] For example, the height of the second region 330b protruding from the first region 330a may be a suitable value such as 0.8 mm, 1.2 mm, 1.6 mm or 2.0 mm, and may be adjusted according to actual conditions.

[0144] Here, the height of the second region 330b protruding from the first region 330a may be the height of the second region 330b along the height direction of the protection plate 330 (refer to Fig.10 The height of the encapsulation layer 332 extending out of the substrate 331 (in the direction shown by y in FIG. 1 ), that is, the height of the encapsulation layer 332 extending out of the substrate 331 may be between 0.8 mm and 2.0 mm. In this way, the electronic component 3311 on the substrate 331 (specifically, it may refer to the electronic component 3311 with the highest height) can be completely covered and encapsulated, thereby providing better protection for the electronic component 3311.

[0145] Among them, the height d1 of the first area 330a can be 0.6-1.5mm. For example, in an optional example of the present application, the thickness of the substrate 331 is 0.6-1.5mm, so that the substrate 331 can be guaranteed to have sufficient mechanical strength. It is understandable that, as described in detail in the above embodiments, the substrate 331 can be a 4-layer board, an 8-layer board, etc. In some specific examples, the number of layers of the substrate 331 can be selected according to actual needs. Of course, the thickness of the substrate 331 will also change accordingly. For example, when the substrate 331 is an 8-layer board, the thickness of the substrate 331 is 1.2mm, and when the substrate 331 is a 6-layer board, the thickness of the substrate 331 is 1.0mm, etc.

[0146] Reference Fig.10 As shown, the height d2 of the second region 330b can be 1.4-3.5mm. For example, in an optional example of the present application, the distance between the lower surface of the substrate 331 and the surface of the packaging layer 332 facing away from the substrate 331 can be 1.4-3.5mm, so as to avoid the second region 330b being too high and occupying too much size in the height direction of the battery 300, thereby ensuring the capacity of the battery cell 300a. Exemplarily, the height d2 of the second region 330b can be a suitable value such as 1.4mm, 2mm, 2.5mm, 3mm or 3.5mm, which can be adjusted according to actual conditions.

[0147] It should be noted here that the numerical values ​​and numerical ranges involved in the embodiments of the present application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0148] Continue to refer to Fig.10 As shown, in the embodiment of the present application, the length of the first area 330a can be 2-15 mm. For example, when the second area 330b is located in the middle area of ​​the protective plate 330, both sides of the second area 330b along the length direction are the first area 330a, and the length of the first area 330a can be understood as the distance between the second area 330b and the two ends of the protective plate 330.

[0149] For example, the length L between the left end of the second region 330b along the x-direction and the left end of the protective plate 330 may be 2-15mm, that is, the length L of the first region 330a on the left side of the second region 330b along the x-direction is 2-15mm; or, the length L between the right end of the second region 330b along the x-direction and the right end of the protective plate 330 may be 2-15mm, that is, the length L of the first region 330a on the right side of the second region 330b along the x-direction is 2-15mm.

[0150] It can be understood that in the above example, the two ends of the encapsulation layer 332 along the length direction are retracted between the two ends of the substrate 331 along the length direction. Fig.10 In the x direction, the two ends of the encapsulation layer 332 along the length direction are retracted from the two ends of the substrate 331 along the length direction, which means that the overall length of the encapsulation layer 332 is less than the overall length of the substrate 331. In addition, neither end of the encapsulation layer 332 is flush with either end of the substrate 331. In other words, referring to Fig.10 As shown, after the electronic components 3311 on the substrate 331 are packaged by using SIP, the packaging layer 332 and the electronic components 3311 located in the packaging layer 332 are formed on the surface of the substrate 331 (eg Fig.10 The upper surface in the middle forms a boss-like structure, that is, the entire shape of the protection plate 330 after packaging is in the shape of a "convex" character.

[0151] In this way, when the protection plate 330 is installed and connected to the battery cell 300a of the battery 300, it can be ensured that the raised second area 330b is staggered with the protrusion 341, so that the second area 330b can be set in the recessed position on one side of the protrusion 341 along the x direction, which is beneficial to reducing the space required to be occupied by the protection plate 330 and improving the capacity of the battery 300.

[0152] In the above example, the length of the two first regions 330a can be a suitable value such as 2mm, 5mm, 8mm, 12mm or 15mm. For example, the retraction distance L at both ends of the encapsulation layer 332 along the length direction can be 2mm, 5mm, 8mm, 12mm or 15mm.

[0153] It should be noted that the retracted distances of the two ends of the encapsulation layer 332 along the length direction may be the same, for example, both ends of the encapsulation layer 332 may be retracted by 2 mm, 5 mm, etc. Of course, the retracted distances of the two ends of the encapsulation layer 332 along the length direction may also be different. Fig.10 As shown, the retracted distance of the left end of the encapsulation layer 332 may be 5 mm, and the retracted distance of the right end of the encapsulation layer 332 may be 10 mm. The specific selection may be made according to the distribution of the electronic components 3311 .

[0154] Of course, in other examples, when there is only one protrusion 341, one end of the second area 330b can be extended to be flush with one end of the protective plate 330, and the first area 330a is between the other end of the second area 330b and the other end of the protective plate 330. The length of the first area 330a is 2-15mm, that is, the other end of the second area 330b is retracted 2-15mm relative to the other end of the protective plate 330.

[0155] For example, refer to Fig.11 As shown, the protrusion 341 is located at the left end of the top end surface 311, and a partial area of ​​the right end of the protective plate 330 can be used as the second area 330b. Correspondingly, the part on the left side of the second area 330b is the first area 330a, and the length L of the first area 330a can be 2-15mm, that is, the distance between the left end of the second area 330b and the left end of the protective plate 330 is 2-15mm. In other words, one end of the second area 330b is retracted by 2-15mm relative to one end of the protective plate 330, thereby ensuring that the second area 330b and the protrusion 341 at the left end are staggered, so that the second area 330b is completely located in the recessed position 342 on the right side of the protrusion 341, which is beneficial to reduce the space required to be occupied by the protective plate 330 and to increase the capacity of the battery 300.

[0156] For example, the retracted distance of one end of the encapsulation layer 332 is 2-15 mm. Exemplarily, the retracted distance of one end of the encapsulation layer 332 can be a suitable value such as 2 mm, 5 mm, 8 mm, 12 mm or 15 mm.

[0157] Reference Figure 2As shown, when there are two protrusions 341, the second area 330b is located in the middle area of ​​the protective plate 330, that is, the two ends of the second area 330b are retracted to the two ends of the protective plate 330 along the length direction, wherein the two sides of the second area 330b along the length direction are the first area 330a respectively.

[0158] For example, refer to Figure 2 and Fig.11 As shown, the battery 300 has a recessed position 342 formed between the two protrusions 341 , and the recessed position 342 is surrounded by the two protrusions 341 and the top sealing edge 343 . The second area 330 b of the protective plate 330 is located in the recessed position 342 , that is, the protruding packaging layer 332 of the protective plate 330 is located between the two protrusions 341 .

[0159] That is to say, in the embodiment of the present application, when installing and fixing the protective plate 330, the second area 330b of the "convex"-shaped protective plate 330 is located in the recessed position 342 between the two protrusions 341. In this way, the space required to be occupied by the protective plate 330 can be reduced. In other words, when the electronic device 10 provides the same installation space position, the volume of the battery body 310 of the battery cell 300a can be increased, thereby increasing the capacity of the battery cell 300a and improving the battery life of the electronic device 10.

[0160] Continue to refer to Figure 2 and Fig.11 As shown, the two first areas 330a of the protective plate 330 are respectively arranged opposite to the two protrusions 341, for example, at least part of the two ends of the substrate 331 are arranged opposite to the two protrusions 341. In this way, when the protective plate 330 is installed, the two ends of the first area 330a, for example, the two ends of the substrate 331 can be respectively connected to the two protrusions 341.

[0161] For example, refer to Figure 2 As shown, the left end of the substrate 331 is connected to a protrusion 341 on the left side, and the right end of the substrate 331 is connected to a protrusion 341 on the right side, that is, the first area 330a on the left side is connected to the protrusion 341 on the left side, and the first area 330a on the right side is connected to the protrusion 341 on the right side, thereby improving the assembly stability of the protection plate 330 on the top end surface 311 of the battery cell body 310.

[0162] In some optional examples, the first region 330 a of the protection plate 330 and the protrusion 341 may be connected via a first insulating layer (not shown in the figure).

[0163] Specifically, in the embodiment of the present application, a first insulating layer can be formed on the protrusion 341 between the two ends of the substrate 331 of the protection plate 330 and the protrusion 341 by dispensing glue, and the protection plate 330 is pasted / bonded to the protrusion 341 through the first insulating layer. In this way, the protection plate 330 can be easily fixed.

[0164] In addition, the protection plate 330 and the protrusion 341 are connected by the first insulating layer, which can avoid short circuits and protect the protrusion 341 of the aluminum-plastic film, thereby preventing leakage of the battery 300 and improving the safety of the battery 300.

[0165] Fig.12 is a partial enlarged view of the protrusion of the battery shell provided in the embodiment of the present application, Fig.13 is another partial enlarged view of the protrusion of the battery shell provided in the embodiment of the present application, Fig.14 This is another partial enlarged view of the protrusion of the shell in the battery provided in the embodiment of the present application.

[0166] Reference Figure 6 , Figure 12 to Figure 14 As shown, the structure of the protrusion 341 in the embodiment of the present application can be various.

[0167] Reference Figure 6 , Fig.12 and Fig.13 As shown, as one example, the protrusion 341 can be formed by bending a portion of the shell 340 where the top sealing edge 343 and the side sealing edge 344 extend out of the top end surface 311 .

[0168] Reference Fig.12 As shown, for the convenience of description, the top seal 343 and the side seal 344 can be extended out of the partial shell of the top end surface 311 as an extension portion 345, wherein the partial shell of the top seal 343 extending out of the top end surface 311 is used as a first extension portion 345a, and the partial shell of the side seal 344 extending out of the top end surface 311 is used as a second extension portion 345b.

[0169] Among them, refer to Figure 11-13 As shown, the protrusion 341 can be bent in a variety of ways. Fig.12 As shown, as a first bending method, the first extension portion 345a can be folded and attached to the surface of the second extension portion 345b facing the top end surface 311, so that the first extension portion 345a and the second extension portion 345b that are attached to each other form a protrusion 341.

[0170] Reference Figure 6As shown, as a second bending manner, the protrusion 341 may include a first bending section 3411 and a second bending section 3412, and the first bending section 3411 is located between the second bending section 3412 and the top sealing edge 343. For example, in some examples, the first bending section 3411 may be attached to the top sealing edge 343, and the second bending section 3412 may be parallel to the top sealing edge 343.

[0171] In specific settings, you can Fig.12 The ends of the first extension portion 345a and the second extension portion 345b that are attached to each other are wound 180 degrees toward the direction of the battery cell body 310. Specifically, the winding direction of the ends of the first extension portion 345a and the second extension portion 345b can be toward the inner side of the side sealing edge 344344 (for example Fig.12 The first bending section 3411 is wound in the opposite direction of the z-axis in the middle of the battery cell 300a to form a first bending section 3411. Specifically, the first bending section 3411 can be wound at a distance of 0.2-1.0 mm from the ends of the first extension portion 345a and the second extension portion 345b toward / close to the battery cell 300a. In other words, the length of the first bending section 3411 is 0.2-1.0 mm, for example, 0.5 mm, 0.7 mm or 1.0 mm.

[0172] It can be understood that by winding the ends of the first extension portion 345a and the second extension portion 345b, after winding, the ends of the first extension portion 345a and the second extension portion 345b face the battery cell body 310 and will not be exposed to the outside, which can avoid corrosion of the cross section of the aluminum-plastic film and improve the service life of the battery 300.

[0173] In addition, after the first bending section 3411 is rolled, the remaining protruding portions of the ends of the first extension portion 345a and the second extension portion 345b are rolled / bent 90 degrees in the same direction as above. In other words, the remaining portions of the first extension portion 345a and the second extension portion 345b extending out of the top surface 311 are directed toward Fig.12 The first bending section 3411 is further bent 90 degrees in the z-axis direction to form a second bending section 3412 which is parallel or approximately parallel to the top sealing edge 343 , wherein the first bending section 3411 is located between the second bending section 3412 and the top sealing edge 343 .

[0174] It can be understood that in order to prevent the first bending section 3411 from recovering or warping after being bent, after the first bending section 3411 is wound / bent, the first bending section 3411 can be fixed by dispensing glue or attaching insulating tape on the inner side of the first bending section 3411. Of course, after the second bending section 3412 is bent, the inner side of the second bending section 3412 (i.e., the side of the second bending section 3412 facing / facing the top sealing edge 343) can also be fixed by dispensing glue or attaching insulating tape.

[0175] So, yes Fig.12 The corresponding protrusion 341 is bent and wound to form Figure 6 The corresponding protrusion 341 shortens the length of the protrusion 341 protruding from the top end surface 311, which can reduce the space occupied by the protrusion 341. That is to say, when the electronic device 10 provides the same installation space position, the battery 300 can be made larger in size, which can increase the volume of the battery cell body 310, thereby increasing the capacity of the battery cell 300a and improving the battery life of the electronic device 10.

[0176] Reference Fig.13 As shown, as the third bending method, refer to Fig.13 As shown, the sharp corners of the first extension portion 345a and the second extension portion 345b at the corners may be folded first, that is, a portion of the first extension portion 345a and the second extension portion 345b may be bent first, for example, by 180 degrees, and then the top sealing edge 343 may be folded toward / facing the side of the battery cell body 310, for example, by 90 degrees, so that the top sealing edge 343 is parallel or approximately parallel to the top end surface 311 of the battery cell body 310, and then the side sealing edge 344 may be bent toward the direction of the battery cell body 310 by nearly or approximately 90 degrees, so as to obtain Fig.13 After the sharp corners of the first extension part 345a and the second extension part 345b are folded, the sharp corners can be glued and fixed on the inner surface of the sharp corners by using glue.

[0177] Reference Fig.13 As shown, the protrusion 341 formed by the above-mentioned third bending method may include a first part 3413, a second part 3414 and a third part 3415, the first part 3413 is connected to the side sealing edge 344, the second part 3414 is connected to the first part 3413, and is bent toward the top end surface 311, and the third part 3415 is located on the side of the second part 3414 facing away from the first part 3413, and is connected to the top sealing edge 343.

[0178] It can be understood that the first portion 3413 and the second portion 3414 are two parts of the second extension portion 345b, and the second portion 3414 is the portion of the second extension portion 345b bent toward the top end surface 311. The second portion 3414 can be attached to the side of the first portion 3413 facing the top end surface 311.

[0179] In addition, the third portion 3415 is a first extension portion 345 a , wherein the third portion 3415 is bent toward the top end surface 311311 .

[0180] The top sealing edge 343 may include a main body portion 343 a and end portions 343 b located at both ends of the main body portion 343 a along the length direction, and the end portions 343 b are connected to the second portion 3414 .

[0181] Reference Fig.13 As shown, the portion of the top seal 343 close to the second portion 3414, such as the end portion 343b, can be bent away from the top end surface 311, so that when at least a portion of the top seal 343, such as the main body 343a, is bent to be parallel or approximately parallel to the top end surface 311, the end portion 343b can transition more smoothly to connect with the second portion 3414, thereby avoiding damage to the end portion 343b and the third portion 3415 due to excessive bending.

[0182] Reference Fig.13 As shown, for example, the third portion 3415 may include two parts, one of which (see Fig.13 m in FIG) is arranged opposite to the second part 3414, and the other part (refer to Fig.13 (as shown in n in FIG. 1 ) is connected to the side of the second part 3414 facing away from the end surface.

[0183] Reference Fig.14 As shown, as another example, the protrusion 341 can be formed by the first extension portion 345a, the second extension portion 345b and the end portion 343b of the top seal 343 after the main body 343a and the side seal 344 of the top seal 343 are bent 90 degrees toward the battery body 310 respectively.

[0184] For example, when the top sealing edge 343 is folded, only the main body 343a of the top sealing edge 343 can be folded so that the main body 343a is parallel or approximately parallel to the top end surface 311, and the end portions 343b located at both ends of the main body 343a are not folded so that the end portions 343b are perpendicular to the top end surface 311, that is, the outer end surfaces of the end portions 343b are arranged opposite to the top end surface 311, and then the side sealing edge 344 is folded according to the above-mentioned folding method so that the extension portion 345 (including the first extension portion 345 and the second extension portion 345) is perpendicular to the top end surface 311, that is, the extension portion 345 is perpendicular to the end portion 343b, thereby forming Fig.14 The protrusion 341 shown in FIG.

[0185] Reference Fig.14 As shown, there may be a transition section B between the main body 343a and the end 343b of the top sealing edge 343, and the transition section B is a bending section formed when the main body 343a is bent toward the top end surface 311. It can be understood that the angle between the transition section B and the top end surface 311 is an acute angle.

[0186] Reference Figure 2 and Fig.11As shown, in some examples, the encapsulation layer 332 may face the top sealing edge 343 of the shell 340, that is, the protrusion formed by the encapsulation layer 332 on the battery protection plate 330 faces the top sealing edge 343, the first area 330a of the protection plate covers the protrusion 341, and the second area 330b and the protrusion 341 are in the width direction of the battery cell (refer to Fig.11 The second area 330b is staggered with the top sealing edge 343 on one side of the protruding portion 341 (in the direction indicated by x). That is, the second area 330b is arranged opposite to the top sealing edge 343 on one side of the protruding portion 341.

[0187] Taking the example of a protective plate having two first areas 330a and a second area 330b located between the two first areas 330a, the first area 330a at the left end of the protective plate 330 covers the side of the protrusion 341 at the left end of the top sealing edge 343 facing away from the battery cell body 310, and the first area 330a at the right end of the protective plate 330 covers the side of the protrusion 341 at the right end of the top sealing edge 343 facing away from the battery cell body 310.

[0188] Reference Fig.11 As shown, exemplarily, when the protrusion 341 is formed by the second bending manner, the first region 330a covers the second bending section of the protrusion 341. For example, at least a portion of the left end of the substrate covers the side of the second bending section at the left end facing away from the cell body 310, and at least a portion of the right end of the substrate covers the side of the second bending section at the right end facing away from the cell body 310.

[0189] It can be understood that, in this example, the first bending section 3411 is attached to the top sealing edge 343 , and the second bending section 3412 is located on the side of the first bending section 3411 facing away from the top sealing edge 343 .

[0190] In addition, when the protruding portion 341 is formed by the third bending manner, the first region 330 a covers the first portion 3413 , the second portion 3414 and the third portion 3415 of the protruding portion 341 .

[0191] In some examples, the first region 330a of the protection plate may abut against the protrusion 341. For example, at least a portion of the end of the substrate may abut against the side of the protrusion 341 (e.g., the second bending section) facing away from the top sealing edge 343. It can be understood that in this example, the first insulating layer is located between the first region 330a and the second bending section.

[0192] Reference Fig.11 As shown, in this example, the height of the protrusion 341 may be less than or equal to the height of the second region 330b protruding from the first region 330a. It can be understood that the height of the second region 330b protruding from the first region 330a refers to the difference between the heights of the second region 330b and the first region 330a, which is the value of d2 minus d1 (refer to Fig.10For example, the height of the second region 330b protruding from the first region 330a may be the distance between the side of the encapsulation layer 332 facing away from the substrate 331 and the substrate 331 .

[0193] It can be understood that when the height of the protrusion 341 is equal to the height of the second area 330b protruding from the first area 330a, the packaging layer 332 of the second area 330b can abut against the top sealing edge 343 on one side of the protrusion 341, and at least part of the first area 330a abuts against the protrusion 341. In this way, on the one hand, the assembly stability between the protection plate 330 and the battery cell 300a can be improved, and on the other hand, the size of the battery 300 formed by the assembly of the protection plate 330 and the battery cell 300a can be reduced, so that in a specific setting, the capacity of the battery cell body 310 can be increased and the battery life of the battery 300 can be improved.

[0194] When the height of the protrusion 341 is less than the height of the second region 330b protruding from the first region 330a, the encapsulation layer 332 of the second region 330b can abut against the top sealing edge 343 on one side of the protrusion 341, and the first region 330a covers the protrusion 341, which can prevent the protrusion 341 from being too high and supporting the protection plate 330, resulting in a too large distance between the protection plate 330 and the battery body 310, thereby reducing the length of the battery 300, so that in a specific setting, the capacity of the battery body 310 can be increased and the battery life of the battery 300 can be improved. It can be understood that in this example, there is a certain gap between the first region 330a and the protrusion 341, and the first insulating layer can be filled in the gap to connect and electrically isolate the first region 330a and the protrusion 341.

[0195] It should be noted that in other examples, the encapsulation layer 332 can be set to face away from the top sealing edge 343 of the shell 340, that is, the protrusion formed by the encapsulation layer 332 on the protective plate 330 faces away from the top sealing edge 343, and the side of the protective plate 330 where the encapsulation layer 332 is not provided can be attached to the top sealing edge 343.

[0196] In this example, the protrusion 341 can be bent and arranged on the side of the first area 330a of the protection plate away from the top edge 343. For example, when the protrusion 341 is formed by the second bending method, the first bending section 3411 is bent and arranged on the side of the first area 330a of the protection plate away from the top edge 343, for example, the first bending section 3411 is attached to the side of the first area 330a away from the top edge 343, and the second bending section 3412 is located on the side of the first bending section 3411 away from the protection plate 330.

[0197] For example, the first bending section 3411 of the left protrusion 341 is attached to the side of the first area 330a at the left end of the protection plate (for example, the left end of the substrate) away from the top sealing edge 343, the second bending section 3412 of the left protrusion 341 is located on the side of the first bending section 3411 facing away from the first area 330a at the left end of the protection plate, the first bending section 3411 of the right protrusion 341 is attached to the side of the first area 330a at the right end of the protection plate (for example, the right end of the substrate) away from the top sealing edge 343, and the second bending section 3412 of the right protrusion 341 is located on the side of the first bending section 3411 facing away from the first area 330a at the right end of the protection plate.

[0198] In this example, the height of the protrusion 341 located on the side of the first area 330a away from the top sealing edge 343 may be less than or equal to the height of the second area 330b protruding from the first area 330a, so that the end of the protrusion 341 facing away from the battery cell body 310 may be flush with or lower than the side of the second area 330b away from the top sealing edge 343.

[0199] For example, the height of the portion of the protrusion 341 located on the side of the first area 330a away from the top sealing edge 343 may be less than or equal to the distance between the encapsulation layer 332 and the substrate 331, thereby ensuring that the end of the protrusion 341 facing away from the battery cell body 310 is flush with or lower than the encapsulation layer 332, thereby avoiding the protrusion 341 protruding from the side of the first area 330a facing away from the top end surface 311 and occupying a certain height space, thereby reducing the length dimension of the battery 300. In this way, when specifically set, the capacity of the battery cell body 310 can be increased and the battery life of the battery 300 can be improved.

[0200] It can be understood that in this example, the first insulating layer is located between the first area 330a and the first bending section. In addition, in this example, the height of the protrusion 341 can be less than or equal to the height of the second area 330b protruding from the first area 330a. For example, the end of the protrusion 341 facing away from the battery body 310 can be flush with or lower than the surface of the side of the packaging layer facing away from the substrate. In this way, the protrusion 341 can be prevented from extending out of the second area 330b of the protective plate and occupying additional height space of the battery, thereby saving a certain amount of space for the increase of the battery cell, so that the capacity of the battery cell can be increased and the battery life can be extended.

[0201] Fig.15 Schematic diagram of the connection between the protection plate and the tab in the battery provided in the embodiment of the present application. Fig.16 is another structural schematic diagram of the connection between the protection plate and the tab in the battery provided in the embodiment of the present application, Fig.17 This is another structural schematic diagram of the connection between the protection plate and the tab in the battery provided in the embodiment of the present application. Fig.18This is another structural schematic diagram of the connection between the protection plate 330 and the tab in the battery provided in the embodiment of the present application.

[0202] As described in detail in the above embodiments, in the embodiment of the present application, the protection plate 330 is electrically connected to the battery body 310 through the tab 320. In order to reduce the length direction (i.e., height direction) of the protection plate 330 along the battery 300a, the protection plate 330 is electrically connected to the battery body 310 through the tab 320. Fig.15 The protective plate 330 is arranged to be parallel or approximately parallel to the end face of the battery cell 300a (for example, the top face 311 described in the above embodiment) to occupy the space occupied by the protective plate 330. In this way, the tab 320 needs to be bent so that at least part of the tab fits with the nickel sheet 333 of the second region 330b of the protective plate to stabilize the welding.

[0203] Reference Figures 15 to 18 As shown, in an optional example of the present application, the pole ear 320 includes a first connecting segment 321 and a second connecting segment 322, the second connecting segment 322 is connected to the battery cell body 310 through the first connecting segment 321, at least part of the first connecting segment 320 is located in the top sealing edge 343, and the second connecting segment 322 is used to connect to the protective plate 330.

[0204] It is understandable that at least a portion of the first connecting segment 321 can be parallel or approximately parallel to the top surface 311 of the battery cell body 310 as the top sealing edge 343 is bent. In addition, the extension direction of the second connecting segment 322 is consistent with the thickness direction of the battery cell, that is, the second connecting segment 322 is parallel to the plate surface of the protection plate 330 and is welded to the nickel sheet 333 of the second region 330b of the protection plate 330 to achieve electrical connection between the tab and the protection plate 330.

[0205] Specifically, in the embodiment of the present application, after the top seal 343 and the side seal 344 are folded, the remaining parts of the positive and negative pole ears 320 (for example, part of the first connecting section 321 and the second connecting section 322) can be bent. For example, the remaining parts of the positive and negative pole ears 320 are bent 90 degrees so that the extension direction of the positive and negative pole ears 320 is consistent with the length direction of the battery cell 300a, and then the length of the positive and negative pole ears 320 is trimmed to ensure that the pole ears 320 of appropriate length are connected to the nickel sheet 333 on the protective plate 330, and at least part of the positive and negative pole ears 320 are fitted with the nickel sheet 333 on the protective plate 330, and welded.

[0206] After being connected to the nickel sheet 333 of the protection plate 330, the protection plate 330 is folded to be parallel or approximately parallel to the top surface 311 of the battery cell 300a, so that at least part of the positive and negative tabs 320 and the nickel sheet 333 are parallel to the plate surface of the protection plate 330. Specifically, the second connection section 322 of the positive and negative tabs 320 is the part connected to the nickel sheet 333 on the protection plate.

[0207] Among them, refer to Fig.15 and Fig.16 As shown, after the protection plate 330 is installed on the top surface 311 of the battery cell 300a, the connection between the tab 320 and the protection plate 330 (for example, the encapsulation layer 332 of the second region 330b) can be oriented toward / facing one side of the battery cell body 310; according to the specific length of the tab 320, the tabs 320 can be respectively arranged according to the following: Fig.15 and Fig.16 There are two ways to fold. For example, Fig.15 The tab 320 is folded once, or Fig.16 The tab 320 is folded twice.

[0208] In other examples, refer to Fig.17 and Fig.18 As shown, after the protection plate 330 is installed on the top surface 311 of the battery cell 300a, the connection between the tab 320 and the protection plate 330 (for example, the encapsulation layer 332 of the second region 330b) can be facing away from / away from one side of the battery cell 300a; according to the specific length of the tab 320, the tab 320 can be respectively Fig.17 and Fig.18 There are two ways to fold. For example, Fig.17 The tab 320 is folded twice, or Fig.18 The tab 320 is folded three times.

[0209] It should be noted that when the tab 320 is folded, the bending point of the tab 320 is retracted into the surface of the battery cell body 310, that is, the projection of the tab 320 on the plane where the top surface 311 is located is located inside the top surface 311. In this way, the bending part of the tab 320 will not protrude from the battery cell 300a, which can prevent the tab 320 from being damaged during transportation of the battery 300. In addition, it also prevents the tab 320 from occupying additional space on one side of the battery cell 300a along the thickness direction, thereby saving a certain amount of space for the increase of the battery cell body 310, so that the capacity of the battery cell body 310 can be increased, and the battery life of the battery 300 can be extended.

[0210] It should be noted that the surface of the cell body 310 refers to any one of the two surfaces of the cell body 310 that are opposite to each other in the thickness direction. Fig.15 As shown, for the convenience of description, the battery cell body 310 may include a Fig.15 The top sealing edge 343 is bent toward the first surface a. The tab 320 is located on one side of the top end surface 311 between the first surface a and the second surface b.

[0211] For example, along the thickness direction of the battery cell 300a, the first connecting section 321 is located inside the surface of the battery cell body 310, and the distance between the first connecting section 321 and the surface of the battery cell 300a is greater than or equal to 0.2 mm. In this way, sufficient safety space can be provided for the tab 320, and the tab 320 can be effectively protected from damage.

[0212] For example, the distance between the first connecting section 321 and the first surface a (refer to Fig.15 d3 is greater than or equal to 0.2 mm. For example, d3 can be a suitable value such as 0.2 mm, 0.3 mm or 0.4 mm, and can be adjusted according to actual conditions.

[0213] Alternatively, the distance between the first connecting section 321 and the second surface b (refer to Fig.15 In the figure, d4) is greater than or equal to 0.2 mm. For example, d4 can be a suitable value such as 0.2 mm, 0.3 mm or 0.4 mm, and can be adjusted according to actual conditions.

[0214] Reference Figures 15 to 18 As shown, in addition, the projection of the protection plate 330 on the battery cell body 310 can be located within the top end surface 311. In other words, the two ends of the protection plate 330 along the width direction can be flush with or lower than the surface of the battery cell body 310. On the one hand, it can prevent the battery 300 from causing damage to the protection plate 330 during transportation. On the other hand, it also prevents the protection plate 330 from occupying additional space on one side of the battery cell 300a along the thickness direction, thereby saving a certain amount of space for the increase of the battery cell body 310 of the battery cell 300a, thereby increasing the capacity of the battery cell 300a and extending the battery life.

[0215] Fig.19 This is another structural schematic diagram of the cooperation between the battery cell and the shell in the battery provided in the embodiment of the present application.

[0216] Reference Fig.19 As shown, a second insulating layer 350 is provided on the side of the top sealing edge 343 facing away from the battery body 310 , and at least the second region 330 b of the protection plate 330 is attached to the second insulating layer 350 , so that electrical insulation is achieved between the protection plate 330 and the top sealing edge 343 .

[0217] Continue to refer to Fig.19As shown, for example, the second connecting section 322 is located between the protection plate 330 and the battery body 310, and a second insulating layer 350 is provided between the second connecting section 322 and the top sealing edge 343. At least part of the second connecting section 322 can be attached to the outer surface of the top sealing edge 343 through the second insulating layer 350, and at least the second region 330b of the protection plate 330 is attached to the second insulating layer 350. The outer surface of the top sealing edge 343 refers to the surface of the top sealing edge 343 facing away from the battery cell 300a.

[0218] The second insulating layer 350 may be an insulating tape to improve the stability of the protection plate 330 on the top surface 311 , thereby ensuring the stability of the electrical connection between the protection plate 330 and the tab 320 .

[0219] The insulating tape can be made of Dupont paper, polyimide (PI) film, polyethylene terephthalate (PET) film or other insulating films. In addition, the double-sided adhesive material of the insulating tape can include but is not limited to acrylic adhesive, silicone, hot melt adhesive or other pressure-sensitive adhesive or heat-sensitive adhesive, which can be selected according to the needs of the implementation.

[0220] Reference Fig.19 As shown, because the second area 330b of the protective plate 330 protrudes from the first area 330a, the protective plate 330 has an uneven surface encapsulated. In some examples, the second insulating layer 350 may have a compressible medium 350a (not shown in the figure) on the side facing the protective plate 330, and the second area 330b of the protective plate 330 is attached to the compressible medium 350a. For example, when the encapsulation layer 332 of the protective plate 330 faces the battery body 310, the protruding second area 330b (such as the encapsulation layer) in the protective plate 330 can be attached to the compressible medium 350a. In this way, under the action of the elastic preload of the compressible medium 350a, the encapsulation layer 332 of the protective plate 330 is tightly attached to the top sealing edge 343, thereby improving the stability of the electrical connection between the pole ear 320 and the protective plate 330.

[0221] Specifically, the compressible medium 350a may be compressible foam adhesive, such as single-sided compressible foam adhesive or double-sided compressible foam adhesive.

[0222] In some possible examples, the second insulating layer 350 may also be formed on the outer surface of the top sealing edge 343 by dispensing.

[0223] By providing a second insulating layer 350 between the outer surface of the top sealing edge 343 and the protective plate 330, a short circuit can be prevented between other electronic components of the protective plate 330 and the tab 320. In addition, an insulating tape is used as the second insulating layer 350 to connect the outer surface of the top sealing edge 343 and the second connecting section 322, and the outer surface of the top sealing edge 343 and the protective plate 330, so that the second connecting section 322 can be prevented from recovering its deformation after being folded, and the tab 320 can be better fixed. In addition, the protective plate 330 can also be fixed, so that the protective plate 330 is stably bonded to the top sealing edge 343 on one side of the battery cell 300a.

[0224] Fig. 20 This is another schematic diagram of the structure of the battery provided in the embodiment of the present application.

[0225] Reference Fig. 20 As shown, in some other optional examples of the present application, a third insulating layer 360 is attached to the side of the protection plate 330 facing away from the battery cell body 310, at least a portion of the third insulating layer 360 covers the protection plate 330, and another portion of the third insulating layer 360 is connected to the battery cell body to fix the protection plate 330.

[0226] In addition, the provision of the third insulating layer 360 effectively electrically insulates the protection plate 330 from external electronic components.

[0227] Specifically, in the embodiment of the present application, the third insulating layer 360 may be insulating adhesive tape, that is, after the protective plate 330 and the battery cell 300a are installed together, the insulating adhesive tape is attached to the surface of the protective plate 330 on the side facing away from the battery cell body 310 for protection. It can be understood that the adhesive tape material and the adhesive material of the third insulating layer 360 may be the same as those of the second insulating layer 350, which will not be described in detail here.

[0228] Fig.21 yes Figure 2 Partial schematic diagram of point C in the middle. Fig.21 As shown, in order to ensure the performance of the battery 300 and the safety of charging and discharging, in an optional example of the present application, a temperature sensor 370 is provided in the battery 300, and the temperature sensor 370 is electrically connected to the protection board 330. Specifically, the temperature sensor 370 is electrically connected to the electronic components, such as the control components, of the second area 330b of the protection board 330 to realize signal transmission between the protection board 330 and the temperature sensor 370.

[0229] During the charging and discharging process of the battery 300, the temperature sensor 370 detects the temperature inside the battery 300 and transmits the detected temperature signal to the control element on the circuit protection board 330. The control element adjusts the charging process according to the temperature signal detected by the temperature sensor 370, such as limiting the charging current or limiting the charging voltage, thereby controlling and compensating the temperature of the battery 300 during the charging and discharging process.

[0230] In this way, the charging and discharging temperature of the battery 300 can be monitored to a certain extent, thereby ensuring the performance of the battery 300 and the safety of charging and discharging to a certain extent.

[0231] Reference Fig.21 As shown, in practice, the temperature sensor 370 may include a temperature sensing probe 371 and a wire 372 , one end of the wire 372 is electrically connected to the protection board 330 , and the other end of the wire 372 is electrically connected to the temperature sensing probe 371 to achieve electrical connection between the temperature sensing probe 371 and the protection board 330 .

[0232] Specifically, the temperature sensing probe 371 in the embodiment of the present application is used to detect the temperature of the battery body 310 in the battery cell 300a. The temperature sensing probe 371 may include a sensor and an outer layer, wherein the outer layer is coated on the periphery of the sensor, so that the outer layer can play a certain protective role on the internal sensor. In some specific examples, the outer layer may be an epoxy resin layer.

[0233] In order to improve the detection accuracy of the temperature sensor 370 on the temperature of the battery 300 , the embodiment of the present application may allow the temperature sensing probe 371 of the temperature sensor 370 to contact the top sealing edge 343 .

[0234] For example, refer to Fig.21 As shown, the top sealing edge 343 is attached to the top surface 311 of the battery body 310 , the temperature sensing probe 371 is located between the top sealing edge 343 and the protection plate 330 , and the temperature sensing probe 371 is in contact with the surface of the top sealing edge 343 facing away from the battery body 310 .

[0235] It can be understood that the material of the top sealing edge 343 is an aluminum-plastic film, wherein the aluminum layer of the aluminum-plastic film has good thermal conductivity. During the charging and discharging process of the battery 300, the heat generated by the battery cell body 310 can be quickly transferred to the outside through the aluminum layer of the aluminum-plastic film. In other words, the temperature of the shell 340 of the battery 300 is close to that of the battery cell body 310, and the temperature difference is relatively low. The temperature of the top sealing edge 343 can more accurately reflect the temperature of the battery cell body 310. In the embodiment of the present application, the temperature sensing probe 371 of the temperature sensor 370 is in contact with the top sealing edge 343. In this way, the temperature detected by the temperature sensor 370 can more accurately reflect the temperature of the battery cell body 310.

[0236] Exemplarily, the temperature sensing probe 371 may be located between the first area 330a of the protection plate 330 and the top sealing edge 343. (It should be noted that, Fig.21 In order to facilitate observation of the temperature sensing probe 371, the structure of the first area of ​​the protection plate 330 is removed or hidden). For example, when the encapsulation layer 332 of the protection plate 330 is arranged toward the top sealing edge 343, because the second area 330b protrudes from the first area 330a, when the second area 330b is attached to the top sealing edge 343, there is a certain gap between the first area 330a and the top sealing edge 343, and the temperature sensing probe 371 can be located in the gap to reasonably utilize the idle space between the protection plate 330 and the battery cell, thereby making the battery structure more compact.

[0237] Reference Fig.21 As shown, in some examples, the temperature sensing probe 371 of the temperature sensor 370 may be disposed close to the protrusion 341 , for example, the temperature sensing probe 371 may be located at the end 343b of the top sealing edge 343 . Fig.21 In the figure, the left side of the dotted line s is the main body 343 a of the top sealing edge 343 , and the right side of the dotted line s is the end 343 b of the top sealing edge 343 , which is close to the protruding portion 341 .

[0238] On the one hand, it is convenient to install the temperature sensor 371. On the other hand, it is also possible to separate the temperature sensor 371 from other electronic components on the protection board 330, so as to avoid the heating of other electronic components affecting the temperature sensor 370, and to improve the accuracy of temperature detection by the temperature sensor 370. Compared with the prior art, it is possible to stably detect the charging and discharging temperature of the battery, and to increase the number of cycles of the battery, that is, to increase the service life of the battery.

[0239] Among them, the temperature sensor 370 can be the thermistor in the aforementioned embodiment. The resistance of the thermistor changes with the change of temperature. According to different temperature coefficients, it can be divided into a positive temperature coefficient thermistor and a negative temperature coefficient thermistor. Among them, the resistance value of the positive temperature coefficient thermistor increases with the increase of temperature, and the resistance value of the negative temperature coefficient thermistor decreases with the increase of temperature.

[0240] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A battery cell, the battery cell comprising a battery cell body and a tab extending from the battery cell body; A shell, located at the periphery of the battery cell, wherein the shell is formed with a top seal, a side seal and at least one protrusion at the edge of the battery cell body, wherein the top seal is bent toward the top end surface, the top end surface is the end surface along the height direction of the battery cell body, and the protrusion is located between the top seal and the side seal and extends toward the top end surface; A protection plate, the protection plate is located on a side of the top sealing edge away from the top end surface, the protection plate includes a first area and a second area, the height of the second area is greater than the height of the first area; the second area is connected to the pole ear, and the second area is staggered with the protrusion along the width direction of the battery body; The protection plate includes a substrate and a packaging layer; in the second area, a plurality of electronic components are arranged on the substrate, and the packaging layer covers the plurality of electronic components, wherein the packaging layer integrally packages the plurality of electronic components on the substrate; The encapsulation layer of the protection plate faces the top sealing edge, and the first area covers the protruding portion, or the first area abuts against the protruding portion; The protruding portion includes a first bending section and a second bending section; The first bending section is attached to the top sealing edge, the second bending section is located on a side of the first bending section facing away from the top sealing edge, and the first area covers the second bending section; Alternatively, the protrusion includes a first portion, a second portion and a third portion; The first part is connected to the side edge seal, the second part is connected to the first part and bent toward the top end surface, and the third part is located on a side of the second part facing away from the first part and connected to the top edge seal.

2. The battery according to claim 1, characterized in that The first area is arranged opposite to the protruding portion.

3. The battery according to claim 1, characterized in that The height of the second area protruding from the first area is 0.8-2.0 mm.

4. The battery according to claim 1, characterized in that The length of the first region is 2-15 mm.

5. The battery according to claim 1, characterized in that The height of the first region is 0.6-1.5 mm, and / or the height of the second region is 1.4-3.5 mm.

6. The battery according to claim 1, characterized in that A height of the protrusion is less than or equal to a height of the second region protruding from the first region.

7. The battery according to claim 1, characterized in that The packaging layer of the protection plate is arranged to face away from the top sealing edge, and the protrusion is bent and arranged on a side of the first region of the protection plate away from the top sealing edge.

8. The battery according to claim 1, characterized in that The first region is connected to the protruding portion through a first insulating layer.

9. The battery according to any one of claims 1 to 8, characterized in that: There are two protrusions, and the two protrusions are respectively located at two ends of the top surface along the width direction; The second region is located between the two protrusions.

10. The battery according to any one of claims 1 to 8, characterized in that: The projection of the protection plate and / or the pole lug on the plane where the top end surface is located is located within the top end surface.

11. The battery according to claim 10, characterized in that The pole ear includes a first connecting section and a second connecting section, the second connecting section is connected to the battery cell body through the first connecting section, and at least a part of the first connecting section is located in the top sealing edge, and the second connecting section is used to connect to the protection plate.

12. The battery according to claim 11, characterized in that The battery cell body comprises a first surface and a second surface opposite to each other in a thickness direction, and the top sealing edge is bent toward the first surface; The distance between the first surface and the side of the first connecting section close to the first surface is greater than or equal to 0.2 mm, or the distance between the second surface and the side of the first connecting section close to the second surface is greater than or equal to 0.2 mm.

13. The battery according to claim 11, characterized in that The second connecting section is located between the protection plate and the battery cell body, or the second connecting section is located on a side of the protection plate facing away from the battery cell body.

14. The battery according to claim 13, characterized in that The second connecting section is located between the protective plate and the battery cell body, and a second insulating layer is provided between the second connecting section and the top sealing edge. At least part of the second connecting section is attached to the outer surface of the top sealing edge through the second insulating layer, and at least the second area of ​​the protective plate is attached to the second insulating layer.

15. The battery according to any one of claims 1 to 8, characterized in that: A third insulating layer is attached to the side of the protection plate facing away from the battery body, at least a portion of the third insulating layer covers the protection plate, and another portion of the third insulating layer is connected to the battery body to fix the protection plate.

16. The battery according to any one of claims 1 to 8, characterized in that: The battery further comprises a temperature sensor electrically connected to the protection board; The temperature sensing probe of the temperature sensor is located between the first area and the top sealing edge; or, the temperature sensing probe of the temperature sensor is arranged close to the protruding portion.

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