Battery device

Abstract

The utility model provides a battery device, relates to the technical field of batteries, and is used for solving the problem that the battery space utilization rate is low due to the design of battery edge sealing and a battery protection plate in the related technology, and the battery device comprises a battery and a flexible protection plate, the first wall surface of the soft package shell of the battery extends outwards to form a first sealing edge, and the edge area of the first sealing edge is provided with a first bent edge; a battery cell of the battery is packaged in the soft package shell, and a tab assembly extending out of the battery cell extends out of the soft package shell from the first bent edge; the flexible protection plate comprises a protection plate body, the two edges, in the width direction, of the protection plate body are perpendicularly connected with a first bent plate and a second bent plate correspondingly, and the first bent plate and the second bent plate are oppositely arranged; the first bending plate is connected with the tab assembly, and the second bending plate is provided with a charging and discharging interface assembly. The bendable first sealing edge and the flexible protection plate reduce the size of the battery and improve the space utilization rate of the battery, so that the energy density of the battery is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery device. Background Technology

[0002] With the continuous development of information technology, the power consumption of electronic devices such as laptops has increased dramatically, leading to a surge in the demand for battery energy density in these devices.

[0003] In related technologies, the top seal edge of the battery extends along the length of the battery, and the tabs extend out of the battery from the top seal edge and are welded to the battery protection board. The setting of the top seal edge and the battery protection board increases the length of the battery, resulting in a decrease in the battery's space utilization and charge / discharge rate. Utility Model Content

[0004] In view of the above problems, this application provides a battery device to solve the problems of low battery space utilization and low charge / discharge rate caused by the increased battery length due to the design of the battery top seal and battery protection board in the related art.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] This application provides a battery device comprising: a battery and a flexible protection plate; the battery includes a pouch casing and a battery cell; the pouch casing has a first wall surface along the length of the battery, the first wall surface extends outward with a first sealing edge, and the edge region of the first sealing edge away from the first wall surface has a first bent edge, the projection of the first bent edge on the first wall surface being located within the first wall surface; the battery cell includes a battery cell body and a tab assembly extending from one side of the battery cell body, the battery cell body being encapsulated within the pouch casing, and the tab assembly extending out of the pouch casing from the first bent edge; the flexible protection plate includes a protection plate body, the thickness direction of the protection plate body being parallel to the thickness direction of the battery cell body, and the two edges of the protection plate body along its width direction being perpendicularly connected to a first bent plate and a second bent plate, and the first bent plate and the second bent plate being disposed opposite to each other; the first bent plate is connected to the tab assembly, and the second bent plate is provided with a charging and discharging interface assembly.

[0007] In one embodiment of this application, the edge region of the tab assembly away from the first bending edge has a tab bending portion, and the projection of the tab bending portion on the first wall surface is located within the first wall surface; the first surface of the tab bending portion is opposite to and spaced from the first bending edge in the battery length direction, and the second surface of the tab bending portion is connected to the surface of the first bending plate away from the second bending plate; along the thickness direction of the tab bending portion, the first surface and the second surface are opposite to each other.

[0008] In one embodiment of this application, an insulating element is provided between the first surface of the electrode bending portion and the first bending edge.

[0009] In one embodiment of this application, the projections of the first bending plate and the second bending plate onto the first wall surface are both located within the first wall surface.

[0010] In one embodiment of this application, the battery device further includes: a heat-conducting component; the heat-conducting component includes a double-sided adhesive layer, a ceramic silicone foam layer and a graphene layer stacked together, the double-sided adhesive layer being bonded to the surface of the first bent plate near the second bent plate.

[0011] In one embodiment of this application, the soft-pack housing has a second wall surface along the width direction of the battery, the second wall surface extends outward with a second sealing edge, the edge region of the second sealing edge away from the second wall surface has a second bent edge, and the projection of the second bent edge on the second wall surface is located within the second wall surface.

[0012] In one embodiment of this application, the charging / discharging interface assembly includes a rigid connecting plate and a charging / discharging interface; the rigid connecting plate is parallel to the second bent plate, a portion of the rigid connecting plate is connected to the surface of the second bent plate away from the first bent plate, or a portion of the rigid connecting plate is connected to the surface of the second bent plate close to the first bent plate; another portion of the rigid connecting plate extends away from the second bent plate in the battery width direction, and the other portion of the rigid connecting plate has a first end face along its thickness direction, the first end face being close to the first wall surface, and the charging / discharging interface is disposed on the first end face.

[0013] In one embodiment of this application, the battery device further includes: a support and a protective partition; the support includes a receiving cavity with an opening, the battery, the flexible protective partition and the charge / discharge interface assembly are all disposed in the receiving cavity through the opening, and the protective partition is connected to the opening; the receiving cavity includes a glue injection area, the first wall surface, the first sealing edge, the tab assembly, the flexible protective partition and the charge / discharge interface assembly are all disposed in the glue injection area.

[0014] In one embodiment of this application, the first bent edge and the second bent edge overlap and intersect at the corner of the soft-pack shell to form an overlapping area, the thickness of the overlapping area being greater than the thickness of the first bent edge and the thickness of the second bent edge; the corner is the intersection of the first wall surface and the second wall surface.

[0015] In one embodiment of this application, the first bent edge has a first extended edge, which bends toward the second wall surface and the inner side of the first extended edge is opposite to the second wall surface; the second bent edge has a second extended edge, which bends toward the second wall surface and fits against the second bent edge, and the second extended edge covers the outer side of the first extended edge.

[0016] The battery device provided in this application has the following technical effects:

[0017] The first sealing edge of the soft-pack casing is bent to obtain the first bent edge, thereby reducing the size of the battery and improving the space utilization of the battery, thus increasing the energy density of the battery within a limited space.

[0018] Meanwhile, the flexible protection board can be bent, thereby reducing its size and space occupation, solving the problem that rigid battery protection boards occupy too much space, resulting in insufficient space for other components. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of the battery provided in the embodiments of this application. Figure 1 ;

[0021] Figure 2 A schematic diagram of the three-dimensional structure of the battery provided in the embodiments of this application. Figure 2 ;

[0022] Figure 3 A schematic diagram of the connection between the flexible protective plate and the battery before bending, as provided in an embodiment of this application;

[0023] Figure 4 A schematic diagram of the connection between the bent flexible protection plate and the battery provided in this embodiment of the application. Figure 1 ;

[0024] Figure 5 A schematic diagram of the connection between the bent flexible protection plate and the battery provided in this embodiment of the application. Figure 2 ;

[0025] Figure 6 An exploded view of the battery device provided in the embodiments of this application;

[0026] Figure 7A cross-sectional view of the battery device provided in the embodiments of this application on the xz plane;

[0027] Figure 8 A top view of the battery device provided in the embodiment of this application in its thickness direction;

[0028] Figure 9 This is a three-dimensional structural diagram of the battery device provided in the embodiments of this application;

[0029] Figure 10 This is a schematic diagram of the structure of the heat-conducting component provided in an embodiment of this application.

[0030] Figure label:

[0031] 100-battery;

[0032] 101 - First wall surface; 102 - Second wall surface; 103 - Fourth wall surface; 104 - Fifth wall surface;

[0033] 105 - Tab assembly; 106 - Tab bending section; 107 - Solder pad;

[0034] 1011 - First sealing edge; 1012 - First bent edge; 1021 - Second sealing edge; 1022 - Second bent edge;

[0035] 200-Flexible protective board;

[0036] 201 - First bending plate; 202 - Second bending plate; 203 - Protective plate body;

[0037] 300-Charge / Discharge Interface Assembly;

[0038] 301 - Rigid connecting plate; 302 - Charging / discharging interface;

[0039] 400 - Insulation components;

[0040] 500 - Thermal conductive component;

[0041] 501 - Double-sided adhesive layer; 502 - Ceramic silicone foam layer; 503 - Graphene layer;

[0042] 600-Standard;

[0043] 601 - Receiving cavity; 602 - Guide rail; 610 - First limiting rib; 620 - Second limiting rib; 630 - Third limiting rib; 611 - First inner surface; 612 - Second inner surface;

[0044] 621 - Body; 622 - Limiting part;

[0045] 700 - Protective partition;

[0046] 800 - Outer packaging. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] In this embodiment of the application, the length direction of the battery is the x-axis shown in the figure, the width direction of the battery is the y-axis shown in the figure, and the thickness direction of the battery is the z-axis shown in the figure.

[0049] refer to Figure 1 The battery device provided in this application includes a battery 100, which includes a soft-pack housing and a battery cell encapsulated within the soft-pack housing.

[0050] The soft-pack casing has a first wall surface 101 along the length direction of the battery (x-axis shown in the figure), a second wall surface 102 and a third wall surface along the width direction of the battery (y-axis shown in the figure), and a fourth wall surface 103 and a fifth wall surface 104 along the thickness direction of the battery (z-axis shown in the figure).

[0051] A first sealing edge 1011 extends outward from the first wall surface 101, and the first sealing edge 1011 is located close to the fifth wall surface 104; a second sealing edge 1021 extends outward from both the second wall surface 102 and the third wall surface, and the second sealing edge 1021 is also located close to the fifth wall surface 104. The first sealing edge 1011 and the second sealing edge 1021 serve as soft-pack plastic sealing edges to ensure the sealing effect of the battery 100.

[0052] The battery cell includes a battery cell body and a tab assembly 105 extending from one side of the battery cell body. The battery cell body is encapsulated in a soft-pack housing, and the tab assembly 105 extends from the first sealing edge 1011 of the soft-pack housing to bring out the positive and negative electrodes of the battery 100.

[0053] The tab assembly 105 may include one positive tab 1052 and one negative tab 1051, or it may include two positive tabs 1052 and two negative tabs 1051, or it may include three positive tabs 1052 and three negative tabs 1051. Those skilled in the art can design it according to the actual situation.

[0054] refer to Figure 2The first sealing edge 1011 can be bent, causing the tab assembly 105 to bend simultaneously, ultimately resulting in the edge region of the first sealing edge 1011 away from the first wall surface 101 having a first bent edge 1012, the projection of the first bent edge 1012 on the first wall surface 101 being located within the first wall surface 101; at this time, the tab assembly 105 extends out of the soft housing from the first bent edge 1012.

[0055] Similarly, the second sealing edge 1021 can be bent such that the edge region of the second sealing edge 1021 away from the second wall surface 102 has a second bent edge 1022, the projection of the second bent edge 1022 on the second wall surface 102 being located within the second wall surface 102.

[0056] After the edge regions of the first sealing edge 1011 and the second sealing edge 1021 of the soft-pack shell are bent, the first bent edge 1012 and the second bent edge 1022 are obtained respectively, thereby reducing the size of the battery in the width direction and the length direction, thereby improving the space utilization of the battery and increasing the energy density of the battery in a limited space.

[0057] Continue to refer to Figure 2 The tab assembly 105 can also be bent, so that the edge area of ​​the tab assembly 105 away from the first bending edge 1012 has a tab bending portion 106. The projection of the tab bending portion 106 on the first wall surface 101 is located inside the first wall surface 101, so as to prevent the tab assembly 105 from protruding from the first wall surface 101 and reduce the space occupied by the tab assembly 105 in the battery thickness direction (z axis shown in the figure).

[0058] Furthermore, the tab bending portion 106 can be bent to be parallel to the first wall surface 101 to reduce the space occupied by the tab assembly 105 in the battery length direction (x-axis shown in the figure).

[0059] refer to Figure 3 and Figure 4 The battery device provided in this application embodiment also includes: a flexible protection plate 200.

[0060] A flexible protection plate 200 is disposed on the first wall surface 101. The flexible protection plate 200 is bendable. The flexible protection plate 200 includes a protection plate body 203, a first bending plate 201, and a second bending plate 202. The thickness direction of the protection plate body 203 is the same as the thickness direction of the battery cell body. The two edges of the protection plate body 203 along its width direction are perpendicularly connected to the first bending plate 201 and the second bending plate 202, respectively. The first bending plate 201 and the second bending plate 202 are disposed opposite to each other.

[0061] The flexible protective plate 200 has a U-shaped cross-section, and the free ends of the first bending plate 201 and the second bending plate 202 do not contact each other. Figure 3As shown, the second bending plate 202 is bent counterclockwise to obtain the following result. Figure 4 The flexible protective plate 200 shown is U-shaped, with the first bending plate 201 and the second bending plate 202 facing each other and parallel.

[0062] The U-shaped flexible protective plate 200 occupies little space and is easy to process. Furthermore, the three-dimensional support composed of the protective plate body 203, the first bending plate 201, and the second bending plate 202 provides strong stability.

[0063] Continue to refer to Figure 4 The tab assembly 105 has a tab bending portion 106 with a solder pad 107. The tab bending portion 106 is connected to the surface of the first bending plate 201 away from the second bending plate 202 through the solder pad 107, so that the flexible protection plate 200 can lead out the positive and negative electrodes of the battery 100.

[0064] A charging / discharging interface assembly 300 is provided on the surface of the second bent plate 202 that is away from the first bent plate 201, or a charging / discharging interface assembly 300 is provided on the surface of the second bent plate 202 that is close to the first bent plate 201.

[0065] By bending the relatively wide flexible protection board 200 into a U-shape, its space occupation is reduced, which solves the problem that the rigid battery protection board occupies too much space, resulting in insufficient space for other components.

[0066] refer to Figure 4 and Figure 5 When the tab bending portion 106 is bent to be parallel to the first wall surface 101, the first surface of the tab bending portion 106 is opposite to and spaced from the first bending edge 1012 in the length direction of the battery (x-axis shown in the figure), and the second surface of the tab bending portion 106 is connected to the surface of the first bending plate 201 that is away from the second bending plate 202; along the thickness direction of the tab bending portion 106, the first surface and the second surface are opposite to each other.

[0067] An insulating element 400 is provided between the first surface of the tab bending portion 106 and the first bending edge 1012. The insulating element 400 may be insulating tape, which is used to prevent other devices on the flexible protection board 200 from contacting the tab assembly 105 and causing short circuits or other adverse conditions.

[0068] Continue to refer to Figure 5 The projections of the first bending plate 201 and the second bending plate 202 on the first wall 101 are both located within the first wall 101.

[0069] By limiting the width of the first bending plate 201 and the second bending plate 202, when the flexible protective plate 200 is disposed on the first wall surface 101, the first bending plate 201 and the second bending plate 202 are prevented from protruding from the first wall surface 101, thereby further reducing the space occupied by the flexible protective plate 200.

[0070] refer to Figure 4 , Figure 5 and Figure 10 The battery device in this application embodiment also includes a heat-conducting element 500.

[0071] The heat-conducting component 500 includes a double-sided adhesive layer 501, a ceramic silicone foam layer 502, and a graphene layer 503 stacked together. The double-sided adhesive layer 501 is bonded to the surface of the first bending plate 201 near the second bending plate 202.

[0072] The heat-conducting component 500 is used to dissipate heat from the heat-generating devices (tab assembly 105 or other devices) disposed on the flexible protection plate 200, avoid high-temperature heat conduction, ensure heat balance, prevent battery overheating, and improve battery life.

[0073] Among them, the ceramic silicone foam layer 502 has excellent high temperature resistance, insulation performance and shock absorption performance, and its weight is relatively light, making it suitable for the field of electronic products; the graphene 503 has extremely high strength, good flexibility and excellent thermal conductivity, making it suitable for electronic devices and batteries.

[0074] Continue to refer to Figure 5 In this embodiment of the application, the charging and discharging interface assembly 300 includes a rigid connecting plate 301 and a charging and discharging interface 302.

[0075] The rigid connecting plate 301 is parallel to the second bending plate 202. A portion of the rigid connecting plate 301 is connected to the surface of the second bending plate 202 away from the first bending plate 201, or a portion of the rigid connecting plate 301 is connected to the surface of the second bending plate 202 close to the first bending plate 201. Another portion of the rigid connecting plate 301 extends away from the second bending plate 202 in the battery width direction (y-axis shown in the figure), and the other portion of the rigid connecting plate 301 has a first end face along its thickness direction. The first end face is close to the first wall surface 101, and the charging and discharging interface 302 is disposed on the first end face.

[0076] The rigid connecting plate 301 is parallel to the second bending plate 202, making the overall structure more compact and avoiding the charging and discharging interface assembly 300 from occupying too much space. At the same time, the charging and discharging interface 302 is set on the first end face of the rigid connecting plate, further avoiding the charging and discharging interface assembly 300 from occupying too much space.

[0077] It should be noted that when a portion of the rigid connecting plate 301 is connected to the surface of the second bending plate 202 near the first bending plate 201, the space occupied by the charging and discharging interface assembly 300 in the battery length direction (x-axis shown in the figure) can be further reduced.

[0078] refer to Figure 6 The battery device in this application embodiment also includes: a bracket 600 and a protective separator 700.

[0079] The bracket 600 includes a receiving cavity 601 with an opening. The battery 100, flexible protection plate 200, charge / discharge interface assembly 300, insulating component 400 and heat-conducting component 500 are all disposed in the receiving cavity 601 through the opening. The protective partition 700 is connected to the opening.

[0080] The support 600 and the protective separator 700 are used to prevent physical damage and environmental factors from affecting the battery, and to prevent the battery cell from being impacted and causing leakage or other adverse conditions; the protective separator 700 can be a PC board (polycarbonate) to provide insulation and protection.

[0081] refer to Figure 7 The cavity 601 includes an injection area A, and the first wall 101, the first sealing edge 1011, the tab assembly 105, the flexible protection plate 200 and the charging and discharging interface assembly 300 are all disposed in the injection area A.

[0082] Injecting adhesive strengthens the structural strength of the battery head and protection board area. It also enhances the overall heat dissipation capacity of the battery head, prevents overheating, and extends battery life.

[0083] refer to Figure 8 In this embodiment of the application, the receiving cavity 601 includes an intersecting first inner surface 611 and a second inner surface 612. The first inner surface 611 is opposite to the first wall surface 101 in the length direction of the battery (x-axis shown in the figure). The first inner surface 611 is provided with a first limiting rib 610 protruding toward the receiving cavity 601. The first limiting rib 610, the first inner surface 611 and the second inner surface 612 together form a limiting groove. The rigid connecting plate 301 is disposed in the limiting groove.

[0084] The second inner surface 612 is also provided with a second limiting rib 620 extending toward the receiving cavity 601. The second limiting rib 620 includes a body 621 and a limiting part 622 connected to the body 621 and extending toward the first inner surface 611. The limiting part 622 abuts against the end face of the rigid connecting plate 301 away from the first inner surface 611 in the battery length direction (x-axis shown in the figure).

[0085] The limiting groove is used to limit the rigid connecting plate 301 in the battery width direction (y-axis shown in the figure), and the second limiting rib 620 is used to limit the rigid connecting plate 301 in the battery length direction (x-axis shown in the figure) to prevent the rigid connecting plate 301 from shifting.

[0086] The limiting part 622 can be vertically connected to the main body 621.

[0087] Continue to refer to Figure 8 In this embodiment, the second inner surface 612 is further provided with a third limiting rib 630 extending toward the receiving cavity 601. The end of the third limiting rib 630 away from the second inner surface 612 is connected to the limiting part 622. The third limiting rib 630, the limiting part 622 and the second inner surface 612 together enclose a limiting area, and the charging and discharging interface 302 is disposed in the limiting area.

[0088] The limiting area can limit the charging and discharging interface 302 in the battery width direction (y-axis shown in the figure) and the battery length direction (x-axis shown in the figure) to prevent the charging and discharging interface 302 from being displaced.

[0089] refer to Figure 9 In this embodiment, the outer wall of the bracket 600 is also provided with a guide rail 602, which matches the positioning groove inside the battery compartment. When the battery device of this embodiment is installed into the battery compartment, the guide rail 602 is used to guide the battery device to be accurately installed in the battery compartment, thereby improving installation efficiency and installation accuracy.

[0090] Continue to refer to Figure 6 The battery device in this application embodiment also includes an outer packaging 800, which is wrapped around the bracket 600 and the protective partition 700.

[0091] The outer packaging 800 is made of durable plastic or paper materials to protect the battery from external environmental factors such as moisture and physical damage. The outer packaging 800 also displays information such as the battery model, type, and specifications to help users install and use the battery correctly.

[0092] refer to Figure 2 and Figure 5 In this embodiment, the corner of the soft-pack shell is the intersection of the first wall surface 101 and the second wall surface 102. The first bent edge 1012 and the second bent edge 1022 overlap and intersect at the corner of the soft-pack shell to form an overlapping area. That is, the overlapping area is composed of multiple layers of material, thereby forming a locally thickened structure. This makes the thickness of the overlapping area greater than the thickness of the first bent edge 1012 and the second bent edge 1022, which can significantly improve the sealing effect and reduce the risk of electrolyte penetration or gas leakage. At the same time, it can also disperse external stress and prevent the corner from cracking due to bending or compression.

[0093] Continue to refer to Figure 5 In this embodiment of the application, the first bent edge 1012 is vertically connected to the edge of the battery width direction (y-axis shown in the figure) with a first extended edge. The first extended edge bends toward the second wall surface 102 and is parallel to the second wall surface 102, and the inner side of the first extended edge is opposite to the second wall surface 102.

[0094] The second bent edge 1022 has a second extended edge along the length direction of the battery (x-axis shown in the figure). The second extended edge bends toward the second wall surface 102 and fits against the second bent edge 1022. The second extended edge also covers the outside of the first extended edge, thereby forming a three-layer sealing edge to further enhance the sealing performance.

[0095] The connection between the second extension edge and the second bending edge 1022 is arc-shaped, which makes the stress distribution more uniform, improves the connection strength between the second extension edge and the second bending edge 1022, and avoids the second extension edge from breaking.

[0096] In summary, this application provides a battery device, including: a battery 100 and a flexible protection plate 200; the battery includes a pouch casing and a cell; the pouch casing has a first wall surface 101 along the length direction of the battery (x-axis shown in the figure), the first wall surface 101 extends outward with a first sealing edge 1011, the edge region of the first sealing edge 101 away from the first wall surface 101 has a first bent edge 1012, and the projection of the first bent edge 1012 on the first wall surface 101 is located within the first wall surface 101; the cell includes a cell body and a tab assembly 105 extending from one side of the cell body, the cell body... Encapsulated within a soft-pack housing, the tab assembly 105 extends out of the soft-pack housing from the first bent edge 1012; the flexible protection plate 200 includes a protection plate body 203, a first bent plate 201, and a second bent plate 202. The thickness direction of the protection plate body 203 is parallel to the thickness direction of the cell body. The two edges of the protection plate body 203 along its width direction are perpendicularly connected to the first bent plate 201 and the second bent plate 202, respectively. The first bent plate 201 and the second bent plate 202 are arranged opposite to each other; the first bent plate 201 is connected to the tab assembly 105, and the second bent plate 202 is provided with a charging and discharging interface assembly 300.

[0097] The first sealing edge 1011 of the soft-pack casing is bent to obtain the first bent edge 1012, thereby reducing the size of the battery, thereby improving the space utilization of the battery and increasing the energy density of the battery in a limited space.

[0098] Meanwhile, the flexible protection board 200 is bendable. After the relatively wide flexible protection board 200 is bent, its space occupation is reduced, which solves the problem that the rigid battery protection board occupies too much space, resulting in insufficient space for other components.

[0099] The various embodiments or embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0100] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0101] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0102] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0103] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery device, characterized in that, include: Battery and flexible protection board; The battery includes a pouch casing and battery cells; The soft-pack casing has a first wall surface along the length of the battery, and a first sealing edge extends outward from the first wall surface. The edge region of the first sealing edge away from the first wall surface has a first bent edge, and the projection of the first bent edge on the first wall surface is located within the first wall surface. The battery cell includes a battery cell body and a tab assembly extending from one side of the battery cell body. The battery cell body is encapsulated in the soft-pack housing, and the tab assembly extends out of the soft-pack housing from the first bent edge. The flexible protection plate includes a protection plate body, the thickness direction of the protection plate body is parallel to the thickness direction of the battery cell body, and the two edges of the protection plate body along its width direction are respectively perpendicularly connected to a first bending plate and a second bending plate, and the first bending plate and the second bending plate are arranged opposite to each other. The first bending plate is connected to the tab assembly, and the second bending plate is provided with a charging and discharging interface assembly.

2. The battery device according to claim 1, characterized in that, The electrode assembly has an electrode bending portion in the edge region away from the first bending edge, and the projection of the electrode bending portion on the first wall surface is located within the first wall surface; The first surface of the electrode bending portion is opposite to and spaced from the first bending edge in the length direction of the battery, and the second surface of the electrode bending portion is connected to the surface of the first bending plate that is away from the second bending plate. Along the thickness direction of the bent portion of the electrode tab, the first surface and the second surface are opposite to each other.

3. The battery device according to claim 2, characterized in that, An insulating element is provided between the first surface of the bent portion of the electrode tab and the first bent edge.

4. The battery device according to claim 1, characterized in that, The projections of the first bent plate and the second bent plate onto the first wall surface are both located within the first wall surface.

5. The battery device according to claim 1, characterized in that, The battery device further includes: a heat-conducting component; The heat-conducting component includes a double-sided adhesive layer, a ceramic silicone foam layer, and a graphene layer stacked together. The double-sided adhesive layer is bonded to the surface of the first bending plate near the second bending plate.

6. The battery device according to claim 1, characterized in that, The soft-pack casing has a second wall surface along the width direction of the battery, and a second sealing edge extends outward from the second wall surface. The edge region of the second sealing edge away from the second wall surface has a second bent edge, and the projection of the second bent edge on the second wall surface is located within the second wall surface.

7. The battery device according to claim 1, characterized in that, The charging / discharging interface assembly includes a rigid connecting plate and a charging / discharging interface; The rigid connecting plate is parallel to the second bending plate, and a portion of the rigid connecting plate is connected to the surface of the second bending plate away from the first bending plate, or a portion of the rigid connecting plate is connected to the surface of the second bending plate close to the first bending plate. Another portion of the rigid connecting plate extends away from the second bent plate in the width direction of the battery, and the other portion of the rigid connecting plate has a first end face along its thickness direction. The first end face is close to the first wall surface, and the charging and discharging interface is disposed on the first end face.

8. The battery device according to claim 7, characterized in that, The battery device also includes: a support frame and a protective separator; The bracket includes a receiving cavity with an opening, in which the battery, the flexible protection plate, and the charging / discharging interface assembly are all disposed from the opening in the receiving cavity, and the protective partition is connected to the opening. The cavity includes a glue injection area, and the first wall surface, the first sealing edge, the electrode assembly, the flexible protective plate, and the charging / discharging interface assembly are all disposed within the glue injection area.

9. The battery device according to claim 6, characterized in that, The first bent edge and the second bent edge overlap and intersect at the corner of the soft-pack shell to form an overlapping area. The thickness of the overlapping area is greater than the thickness of the first bent edge and the thickness of the second bent edge. The corner is the intersection of the first wall surface and the second wall surface.

10. The battery device according to claim 9, characterized in that, The first bent edge has a first extended edge, which bends toward the second wall surface, and the inner side of the first extended edge is opposite to the second wall surface; The second bent edge has a second extended edge, which bends toward the second wall surface and fits against the second bent edge, and the second extended edge covers the outside of the first extended edge.

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