Battery and electronic device
By optimizing the edge sealing structure and insulation design of the battery cell, the problem of damage to the protection plate is solved, the safety and capacity of the battery are improved, and the processing difficulty and cost are reduced.
Patent Information
- Application Number
- CN202422143846.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-02
AI Technical Summary
During the battery packaging process, opening a large gap on the protective plate can easily lead to structural damage, increasing processing difficulty and safety risks of the battery cell.
By optimizing the edge sealing structure design of the battery cell, reducing the number of bends of the edge sealing, using the double-cell top sealing folding technology to reduce the width of the folding part, designing a special-shaped cutting port to reduce the width of the protective plate notch, and installing insulation measures on the protective plate to avoid electrical corrosion.
It reduces the risk of damage to the protective plate, reduces processing difficulty, improves the safety and capacity of the battery, and reduces process costs.
Smart Images
Figure CN223052235U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of batteries, and particularly relates to a battery and an electronic device. Background Art
[0002] When encapsulating a battery cell, a stack is formed at the transition position between the top edge seal and the side edge seal of the battery cell. There are tabs on the battery cell, and the battery includes a protection board for welding with the tabs.
[0003] When two batteries are placed side by side, the protection board needs to span across the stacked part of the edge seal. Therefore, a notch for avoiding the stacked part needs to be opened on the protection board. Since the stacked part has a relatively large width, the width of the notch also needs to be opened relatively large, which is likely to damage the structure of the protection board. Summary of the Utility Model
[0004] This application aims to provide a battery and an electronic device, and at least solve the problem that the protection board is easily damaged due to the opening of a relatively large notch on the protection board in the related art.
[0005] To solve the above technical problems, this application is implemented as follows:
[0006] In a first aspect, an embodiment of this application provides a battery, including: at least two battery cells arranged side by side, and any one of the battery cells has a tab; an edge seal, and any one of the battery cells is provided with an edge seal, the edge seal includes a top edge seal and a side edge seal, the top edge seal is located at the top of the battery cell, at least a part of the side edge seal is located at the side of the battery cell, a folding part is formed between the side edge seal and the top edge seal, and the folding part extends out of the top of the battery cell. Along the thickness direction of the battery cell, the maximum width of the top edge seal is W1, the maximum width of the side edge seal is W2, and the maximum width of the folding part between two adjacent battery cells is W3, where W1 > W3 and W2 > W3; a protection board connected to the tab, and the protection board is provided with a notch, and in the adjacent sides of two adjacent edge seals, the folding part is received in the notch.
[0007] In a second aspect, an embodiment of this application provides an electronic device, including:
[0008] The battery as in the first aspect.
[0009] In an embodiment of the present application, in the thickness direction of the battery cell, the maximum width of the top sealing edge is W1, the maximum width of the folding portion is W3, W1 is greater than W3, and the maximum width of the side sealing edge is W2, W2 is greater than W3. Since the folding portion is formed between the top sealing edge and the side sealing edge, in the related art, the maximum width in the top sealing edge and the side sealing edge is basically equal to the maximum width of the folding portion, which results in a relatively large width of the folding portion. However, in this embodiment, the maximum width of the folding portion is smaller than both the maximum width of the top sealing edge and the maximum width of the side sealing edge, which is equivalent to reducing the maximum width of the folding portion. As the width of the folding portion decreases, the width of the notch on the protection plate can also be reduced. The position on the protection plate where the notch is provided has a relatively large width, and the protection plate is not easily broken or damaged, avoiding damage to the structure of the protection plate, and the difficulty of arranging circuits on the protection plate is also reduced, thereby reducing the processing difficulty of the battery cell.
[0010] This embodiment adopts a new design scheme for the battery cell sealing edge structure. Through the optimization of the battery cell sealing edge structure design, the number of bends of the sealing edge is reduced (that is, without bending the folding portion, the width of the bent portion can be reduced), and the double-battery-cell top-sealing folding technology is introduced, so as to achieve the purpose of increasing the capacity of the double-battery-cell project.
[0011] Some of the additional aspects and advantages of the present application will be given in the following description, some will become apparent from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:
[0013] Figure 1 is one of the schematic structural diagrams of the battery according to the embodiment of the present application;
[0014] Figure 2 is Figure 1 the enlarged view of part A in
[0015] Figure 3 is one of the schematic structural diagrams of the double-battery-cell according to the embodiment of the present application;
[0016] Figure 4 shows Figure 3 the enlarged view of part B in
[0017] Figure 5 is the second schematic structural diagram of the double-battery-cell according to the embodiment of the present application;
[0018] Figure 6 is the schematic structural diagram of the protection plate according to the embodiment of the present application;
[0019] Figure 7Schematic diagram of the cell and the folding part according to an embodiment of the present application;
[0020] Figure 8 Schematic diagram of the protection board without insulating adhesive tape wound thereon according to an embodiment of the present application;
[0021] Figure 9 Schematic diagram of the protection board with insulating adhesive tape wound thereon according to an embodiment of the present application;
[0022] Figure 10 Schematic diagram of the protection board without insulating coating covered thereon according to an embodiment of the present application;
[0023] Figure 11 Schematic diagram of the protection board with insulating coating covered thereon according to an embodiment of the present application;
[0024] Figure 12 Schematic diagram of the protection board with a cut-out provided on the left side of the edge sealing according to an embodiment of the present application;
[0025] Figure 13 Schematic diagram II of the battery according to an embodiment of the present application;
[0026] Figure 14 Schematic diagram of the edge sealing, the cell and the tab according to an embodiment of the present application;
[0027] Figure 15 Schematic diagram of the protection board with a cut-out provided on the right side of the edge sealing according to an embodiment of the present application.
[0028] Reference numerals:
[0029] 100 Battery, 110 Cell, 111 Tab, 112 First cell, 113 Second cell, 120 Edge sealing, 121 Side edge sealing, 1211 First part, 1212 Second part, 122 Top edge sealing, 1221 Edge sealing part, 1222 Bending part, 123 Folding part, 124 Edge sealing body, 125 Sealing part, 126 First edge sealing, 127 Second edge sealing, 128 Cut-out, 130 Protection board, 131 Notch, 140 Insulating part. Detailed description of the embodiments
[0030] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.
[0031] The terms "first" and "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.
[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.
[0033] The following Figures 1 - 15 describes a battery and an electronic device according to an embodiment of this application.
[0034] Combined with Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, according to some embodiments of this application, the battery 100 includes at least two battery cells 110, a sealing edge 120, and a protection board 130. The at least two battery cells 110 are arranged side by side, and each battery cell 110 has a tab 111. A sealing edge 120 is provided on each battery cell 110. The sealing edge 120 includes a top sealing edge 122 and a side sealing edge 121. The top sealing edge 122 is located at the top of the battery cell 110, and at least a part of the side sealing edge 121 is located at the side of the battery cell 110. A folding portion 123 is formed between the side sealing edge 121 and the top sealing edge 122, and the folding portion 123 extends out of the top of the battery cell 110. Among them, along the thickness direction of the battery cell 110 ( Figure 1 the arrow direction at a in ), the maximum width of the top sealing edge 122 is W1, the maximum width of the side sealing edge 121 is W2, and the maximum width of the folding portion 123 between two adjacent battery cells 110 is W3. W1 > W3 and W2 > W3. The protection board 130 is connected to the tab 111, and a notch 131 is provided on the protection board 130. On the adjacent sides of two adjacent sealing edges 120, the folding portion 123 is received in the notch 131.
[0035] On each battery cell 110, there is a sealing edge 120, and the sealing edge 120 plays a protective role for the battery 100. At least two tabs 111 are provided on each battery cell 110, and welding parts are provided on the protection board 130. The protection board 130 is connected to the tabs 111 through the welding parts. After the protection board 130 is connected to the tabs 111, the protection board 130 is attached to the top sealing edge 122. By attaching the protection board 130 to the top sealing edge 122 of the battery cell 110, the internal winding core can be effectively prevented from moving, and during the fall of the electronic device, the leakage caused by the internal winding core of the battery 100 breaking through the top sealing edge 122 can be reduced, improving the safety of the battery 100.
[0036] When the sealing edge 120 wraps the battery cell 110, a part of the sealing edge 120 is bent and attached to the side of the battery cell 110 to form a side sealing edge 121, and a part of the sealing edge 120 is bent and attached to the top of the battery cell 110 to form a top sealing edge 122. A folding part 123 is formed at the transition position between the side sealing edge 121 and the top sealing edge 122, and the folding part 123 protrudes from the top of the battery cell 110.
[0037] When at least two battery cells 110 are placed side by side, the protection board 130 needs to be attached to the top sealing edges 122 of at least two battery cells 110 at the same time. When installing the protection board 130, it is necessary to avoid interference between the protection board 130 and the folding part 123. Therefore, a notch 131 is opened on the protection board 130, and the folding part 123 can be accommodated in the notch 131. Therefore, the protection board 130 can avoid the folding part 123 between two adjacent battery cells 110, ensuring that the protection board 130 can be attached to the top sealing edge 122.
[0038] Since the folding part 123 is accommodated in the notch 131, the wider the width of the folding part 123, the wider the width of the notch 131. When the width of the notch 131 is too large, the position of the protection board 130 with the notch 131 has a smaller width, resulting in the protection board 130 being easily broken and damaged, and the difficulty of setting lines on the protection board 130 also increases.
[0039] In the thickness direction of the battery cell 110, the maximum width of the top sealing edge 122 is W1, the maximum width of the folding part 123 is W3, W1 is greater than W3, and the maximum width of the side sealing edge 121 is W2, W2 is greater than W3. Since the folding part 123 is formed between the top sealing edge 122 and the side sealing edge 121, in the related art, the maximum width in the top sealing edge and the side sealing edge is basically equal to the maximum width of the folding part, which results in a relatively large width of the folding part. In this embodiment, the maximum width of the folding part 123 is smaller than both the maximum width of the top sealing edge 122 and the maximum width of the side sealing edge 121, which is equivalent to reducing the maximum width of the folding part 123. As the width of the folding part 123 decreases, the width of the notch 131 on the protection plate 130 can also be reduced. The position on the protection plate 130 where the notch 131 is provided has a relatively large width, and the protection plate 130 is not easily broken or damaged, avoiding damage to the structure of the protection plate 130, and the difficulty of arranging circuits on the protection plate 130 is also reduced, thereby reducing the processing difficulty of the battery cell 110.
[0040] This embodiment adopts a new design scheme for the sealing edge structure of the battery cell. Through the optimization of the sealing edge 120 structure design of the battery cell 110, the number of bends of the sealing edge 120 is reduced (that is, without bending the folding part 123, the width of the bent part 1222 can be reduced), and the double-battery-cell top-sealing folding technology is introduced, so as to achieve the purpose of increasing the capacity of the double-battery-cell project.
[0041] Combined with Figure 1 and Figure 2 As shown, in some embodiments, optionally, the top sealing edge 122 includes a sealing edge part 1221 and a bent part 1222. The bent part 1222 is located on the side of the sealing edge part 1221 adjacent to the side sealing edge 121. The sealing edge part 1221 is attached to the top of the battery cell 110, and the bent part 1222 is bent away from the top of the battery cell 110 compared with the sealing edge part 1221. The first part 1211 of the side sealing edge 121 is attached to the side of the battery cell 110, the second part 1212 of the side sealing edge 121 extends out of the top of the battery cell 110, and the folding part 123 includes the bent part 1222 and the second part 1212. Between two adjacent battery cells 110, along the thickness direction of the battery cell 110, the widths of the bent part 1222 and the second part 1212 are both less than or equal to W3.
[0042] During the process of covering the sealing edge 120 on the battery cell 110, a part of the top sealing edge 122 and a part of the side sealing edge 121 overlap each other, thereby forming the folding part 123.
[0043] Specifically, in the top sealing edge 122, a part of the top sealing edge 122 is attached to the top of the battery cell 110, and this part is defined as the sealing edge part 1221, and another part of the top sealing edge 122 is bent compared with the sealing edge part 1221, and this part is defined as the bent part 1222.
[0044] In the side edge seal 121, the first part 1211 in the side edge seal 121 faces the side of the battery cell 110, and the second part 1212 in the side edge seal 121 extends out of the top of the battery cell 110. The second part 1212 and the bending part 1222 are stacked on each other to form a folding part 123.
[0045] The width of one of the bending part 1222 and the second part 1212 is W3, and the width of the other of the bending part 1222 and the second part 1212 is W4, where W3≥W4. For example, the width of the bending part 1222 is W3, and the width of the second part 1212 is W4. The width of the bending part 1222 is greater than or equal to the width of the second part 1212, so that the maximum width of the folding part 123 can be W3. Alternatively, the width of the bending part 1222 is W4, and the width of the second part 1212 is W3, which can also satisfy that the maximum width of the folding part 123 is W3.
[0046] In this embodiment, the widths of the bending part 1222 and the second part 1212 can be equal, that is, the widths of both the bending part 1222 and the second part 1212 are W3. Alternatively, the widths of the bending part 1222 and the second part 1212 are not equal, and the width of the larger one of the two is set as W3, and the other is W4.
[0047] It can be seen that whether the widths of the bending part 1222 and the second part 1212 are equal or not, it can be ensured that the maximum width of the folding part 123 is smaller than both the maximum width of the top edge seal 122 and the maximum width of the side edge seal 121.
[0048] Combined with Figure 13 and Figure 15 shown, in a possible application, a special-shaped cutout 128 is added at the upper right corner of the edge seal 120. The notch 131 should avoid the sealing area in the edge seal 120, and for a part of the area outside the sealing area in the edge seal 120, the cutout 128 is aligned with the edge of the battery cell 110, or the cutout 128 is recessed into the edge of the battery cell 110 body. As Figure 15 shown, the cutout 128 is flush with the edge of the battery cell 110, or extends beyond the two dotted line positions to the left and downwards.
[0049] The edge seal 120 is bent. By adjusting the size of the cutout 128 and the height of the bending of the edge seal 120, it is ensured that the width dimension of the cutout 128 after the edge seal 120 is bent is consistent. As Figure 2 shown, the widths of the bending part 1222 and the second part 1212 are consistent.
[0050] As Figure 12As shown, on another battery cell 110, for the sealing edge 120, in the same way as above, a cut-out 128 of the same size is made at the upper left corner of the sealing edge 120, and then the side sealing edge 121 and the top sealing edge 122 are bent.
[0051] Place the two battery cells 110 side by side and fix them in the middle to obtain Figure 4 the structural design of the dual battery cell shown in, ensuring that the cut-outs 128 of the two sealing edges 120 are both in the middle.
[0052] Figure 7 is a side view of the special-shaped sealing edge 120, and the width of the sealing edge 120 exceeding the battery cell 110 is reduced.
[0053] Match with the protective plate 130 with a special-shaped design. The size of the notch 131 of the protective plate 130 can be matched according to the size of the cut-out 128 of the sealing edge 120. Weld and bend the protective plate 130, and place the protective plate 130 across the folding part 123 between the two battery cells 110.
[0054] By designing the cut-out 128 on the sealing edge 120, the overlapping area of the side sealing edge 121 and the top sealing edge 122 does not need to be bent again, so that the width of the folding part 123 can be reduced. In this way, the number of bends of the sealing edge 120 can be reduced. The sealing edge 120 can be an aluminum-plastic film, and the total number of bends of the aluminum-plastic film can be 2 times, and the top-sealing folding technology is introduced.
[0055] As Figure 1 shown, in another possible application, the side sealing edge 121 and the top sealing edge 122 of the sealing edge 120 are bent according to the normal process without making the cut-out 128. After bending the sealing edge 120, a part of one folding part 123 is cut, and a part of the adjacent folding part 123 is cut to reduce the width of the folding part 123. Finally, the two battery cells 110 are combined together, and the cut folding part 123 is in the middle of the two battery cells 110. One sealing edge 120 can be cut on the left, and the other sealing edge 120 can be cut on the right. The two cut folding parts 123 are located in the middle of the two battery cells 110. The widths of the two cut folding parts 123 are kept the same. Then weld a special-shaped protective plate 130, and a notch 131 is provided on the protective plate 130.
[0056] By the above method, the bending process of the folding part 123 is reduced, the process difficulty and process cost of the battery 100 are reduced, the size of the notch 131 in the middle of the protective plate 130 is reduced, and the practical area of the protective plate 130 is increased. On the premise of ensuring that the sealing edge 120 is not damaged, the top-sealing folding technology is introduced for the dual battery cell. With the same size of the battery cell 110, the length size of the battery 100 can be reduced, and converted into the battery 100 capacity, it is increased by about 2% (calculated according to the length size of 75 mm).
[0057] Combined withFigure 1 , Figure 2 , Figure 3 and Figure 4 As shown in Figure 3 , Figure 4 , in some embodiments, optionally, between two adjacent battery cells 110, the maximum length L1 that the folding part 123 extends out of the top of the battery 100, the length of the first part 1211 is L2, and L1 + L2 < L2 + W1.
[0058] When installing the edge seal 120, a part of the edge seal 120 is bent and covers the top of the battery cell 110. Therefore, when the edge seal 120 does not cover the surface of the battery cell 110, the length of the edge seal 120 is equal to the sum of the lengths of the first part 1211 and the top edge seal 122, and the sum of the lengths of the first part 1211 and the top edge seal 122 is L2 + W1. The maximum length that the folding part 123 extends out of the top of the battery 100 is L1. Since L1 + L2 < L2 + W1, therefore, a part of the position of the edge seal 120 corresponding to the folding part 123 is cut off, so that the length that the folding part 123 extends out of the surface of the battery cell 110 is reduced, so that the length of the folding part 123 is less than the thickness of the protection plate 130, or the length of the folding part 123 is substantially the same as the thickness of the protection plate 130, avoiding the folding part 123 protruding out of the protection plate 130 along the thickness direction of the protection plate 130, thereby avoiding interference between the folding part 123 and other components.
[0059] As Figure 4 shown, in some embodiments, optionally, between two adjacent battery cells 110, the maximum lengths of the bending part 1222 and the second part 1212 are both less than or equal to L1.
[0060] The maximum length of one of the bending part 1222 and the second part 1212 is L1, and the maximum length of the other of the bending part 1222 and the second part 1212 is L3, and L1 ≥ L3. For example, the maximum length of the bending part 1222 is L1, the maximum length of the second part 1212 is L3, and the maximum length of the bending part 1222 is greater than or equal to the maximum length of the second part 1212, so that the maximum length of the folding part 123 can be L1. Or, the maximum length of the bending part 1222 is L3, the maximum length of the second part 1212 is L1, and it can also satisfy that the maximum length of the folding part 123 is L1.
[0061] In this embodiment, the maximum lengths of the bending part 1222 and the second part 1212 can be equal, that is, the maximum lengths of both the bending part 1222 and the second part 1212 are L1, or the maximum lengths of the bending part 1222 and the second part 1212 are not equal, and the maximum length of the one with the larger length of the two is set to L1, and the other is L3.
[0062] It can be seen that, regardless of whether the maximum lengths of the bending portion 1222 and the second portion 1212 are equal or not, it is possible to prevent the folding portion 123 from protruding from the protection plate 130 in the thickness direction of the protection plate 130, thereby avoiding interference between the folding portion 123 and other components.
[0063] Combined with Figure 14 and Figure 15 As shown, in some embodiments, optionally, the edge seal 120 includes an edge seal body 124 and a sealing portion 125. The sealing portion 125 is located within the edge seal body 124 and is circumferentially distributed along the edge seal body 124. Along the length direction of the edge seal body 124 ( Figure 15 the arrow direction at b in Figure 15 ), the distance between the edge of the edge seal body 124 and the sealing portion 125 is H1. Along the width direction of the edge seal body 124 ( Figure 15 the arrow direction at c in Figure 15 ), the distance between the edge of the edge seal body 124 and the sealing portion 125 is H2. The width difference between the edge seal portion 1221 and the bending portion 1222 is H3, and the width difference between the first portion 1211 and the second portion 1212 is H4, where H3 ≤ H1 and H4 ≤ H2.
[0064] When cutting a part of the folding portion 123, it is necessary to avoid cutting the sealing portion 125, thereby ensuring the integrity of the sealing portion 125. The sealing portion 125 has a waterproof function. Preventing the sealing portion 125 from being cut can prevent the sealing portion 125 from losing its waterproof function.
[0065] A part of the bending portion 1222 is cut. The width of the cut-off part of the bending portion 1222 is H3, and the distance between the edge of the top edge seal 122 and the sealing portion 125 is H1, where H3 ≤ H1, thereby avoiding cutting the sealing portion 125.
[0066] A part of the second portion 1212 is cut. The width of the cut-off part of the second portion 1212 is H4, and the distance between the edge of the side edge seal 121 and the sealing portion 125 is H2, where H4 ≤ H2, thereby avoiding cutting the sealing portion 125.
[0067] In a possible application, the sealing portion 125 is an aluminum layer.
[0068] Combined with Figure 8 、 Figure 9 、 Figure 10 and Figure 11 As shown, in some embodiments, optionally, the battery 100 further includes an insulating portion 140, and the insulating portion 140 is at least provided on the inner wall of the notch 131.
[0069] The top-sealing folding technology application of dual batteries can be achieved in the manner of the above embodiments. However, due to the cut-out 128 of the sealing edge 120, the aluminum layer is exposed, and the exposed aluminum layer will directly contact the inner wall of the notch 131, posing a great risk of electrocorrosion (the probability of the edge metal layer of the protection board 130 being exposed is relatively high, and there is no absolutely effective interception method). Therefore, insulation measures need to be taken between the protection board 130 and the folding part 123.
[0070] By providing an insulating part 140 on the inner wall of the notch 131, direct contact between the protection board 130 and the aluminum layer can be prevented. The insulating part 140 insulates between the protection board 130 and the folding part 123, avoiding the problem of electrocorrosion.
[0071] In some embodiments, optionally, the insulating part 140 includes insulating adhesive tape and / or insulating coating.
[0072] Combined Figure 8 and Figure 9 As shown, the first method of insulating between the protection board 130 and the folding part 123 is to add a layer of insulating adhesive tape on the protection board 130 ( Figure 8 The arrow in
[0073] Combined Figure 10 and Figure 11 As shown, the second method of insulating between the protection board 130 and the folding part 123 is to apply an insulating coating to the notch 131 part of the protection board 130 before welding the protection board 130 and the battery cell 110. The insulating coating can be a vacuum nano-coating, forming an insulating layer on the surface of the notch 131 part, isolating the protection board 130 from the cut-out 128, and avoiding the electrocorrosion problem of the battery cell 110.
[0074] In a possible application, the insulating part 140 can only cover the position of the notch 131, or can cover the outer surface of the entire protection board 130. Of course, in other embodiments, the insulating part 140 can also be made on the notch part of the battery cell 110, but the process difficulty will be relatively high, and it is easy to affect the performance and production capacity of the battery cell 110.
[0075] Combined Figure 3 and Figure 13As shown, in some embodiments, optionally, the multiple battery cells 110 include a first battery cell 112 and a second battery cell 113. The edge seal 120 covering the surface of the first battery cell 112 is defined as the first edge seal 126, and the edge seal 120 covering the surface of the second battery cell 113 is defined as the second edge seal 127. The first side of the first edge seal 126 is adjacent to the first side of the second edge seal 127, and the second side of the first edge seal 126 and the second side of the second edge seal 127 are away from each other.
[0076] On the first side of the first edge seal 126, the maximum width of the folding portion 123 is W3, and on the second side of the first edge seal 126, the maximum width of the folding portion 123 is W5, where W5 > W3 ( Figure 13 the structures within the two dashed boxes are both the folding portion 123).
[0077] On the first side of the second edge seal 127, the maximum width of the folding portion 123 is W3, and on the second side of the second edge seal 127, the maximum width of the folding portion 123 is W5.
[0078] In the first edge seal 126, the first side of the first edge seal 126 is adjacent to the adjacent second edge seal 127, no battery cell 110 is arranged beside the second side of the first edge seal 126, the folding portion 123 is provided on the first side of the first edge seal 126, and the folding portion 123 is also provided on the second side of the first edge seal 126. The maximum width of the folding portion 123 provided on the first side of the first edge seal 126 is smaller, and the maximum width of the folding portion 123 provided on the second side of the first edge seal 126 is larger. The same applies to the second edge seal 127.
[0079] Therefore, the folding portion 123 at the adjacent position of the two battery cells 110 is cut, and the folding portion 123 at the position where the two battery cells 110 face away from each other is not cut. That is, the folding portion 123 corresponding to the position of the notch 131 needs to be cut, and the folding portion 123 not corresponding to the position of the notch 131 is not cut. By the above method, the processing difficulty of the edge seal 120 can be reduced.
[0080] As Figure 1 shown, in some embodiments, optionally, the multiple battery cells 110 include a first battery cell 112 and a second battery cell 113. The edge seal 120 covering the surface of the first battery cell 112 is defined as the first edge seal 126, and the edge seal 120 covering the surface of the second battery cell 113 is defined as the second edge seal 127. The first side of the first edge seal 126 is adjacent to the first side of the second edge seal 127, and the second side of the first edge seal 126 and the second side of the second edge seal 127 are away from each other.
[0081] On the first side and the second side of the first edge seal 126, the maximum width of the folding portion 123 is both W3. On the first side and the second side of the second edge seal 127, the maximum width of the folding portion 123 is both W3.
[0082] In the first edge seal 126, the first side of the first edge seal 126 is adjacent to the adjacent second edge seal 127. The battery cell 110 is not arranged beside the second side of the first edge seal 126. The first side of the first edge seal 126 is provided with a folding part 123, and the second side of the first edge seal 126 is also provided with a folding part 123. The maximum widths of the folding parts 123 provided on the first side and the second side of the first edge seal 126 are equal. Therefore, the folding part 123 located on the first side of the first edge seal 126 is cut, and the folding part 123 located on the second side of the first edge seal 126 is also cut. The same applies to the second edge seal 127.
[0083] Both sides of the first edge seal 126 are notched 131 at the same time, and both sides of the second edge seal 127 are also notched 131 at the same time. The two edge seals 120 in a battery 100 are completely identical, and there is no need to distinguish between the left and right battery cells 110 during the production process, improving the convenience during the production process.
[0084] The maximum width of the folding part 123 provided on the second side of the first edge seal 126 is larger. Therefore, the folding parts 123 at the adjacent positions of the two battery cells 110 are cut, and the folding parts 123 at the positions where the two battery cells 110 face away from each other are not cut. That is, the folding parts 123 corresponding to the positions of the notches 131 need to be cut, and the folding parts 123 not corresponding to the positions of the notches 131 are not cut. By the above method, the processing difficulty of the edge seal 120 can be reduced.
[0085] In the embodiments of the present application, an electronic device is proposed, which includes the battery in any of the above embodiments and can achieve the technical effects in any of the above embodiments, which will not be elaborated here.
[0086] In a possible application, the electronic device can be a mobile phone, a tablet computer, an e-book, a notebook computer, a smart wearable device, etc.
[0087] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0088] Although embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.
Claims
1. A battery, characterized in that: include: At least two battery cells, at least two of which are arranged side by side, and any of which has a tab; Edge sealing, any of the battery cells is provided with the edge sealing, the edge sealing includes a top edge sealing and a side edge sealing, the top edge sealing is located at the top of the battery cell, at least a portion of the side edge sealing is located at the side of the battery cell, a folding portion is formed between the side edge sealing and the top edge sealing, and the folding portion extends out of the top of the battery cell, along the thickness direction of the battery cell, the maximum width of the top edge sealing is W1, the maximum width of the side edge sealing is W2, and the maximum width of the folding portion located between two adjacent battery cells is W3, W1>W3, W2>W3; A protection plate is connected to the tab, and a notch is provided on the protection plate. The folded portion is accommodated in the notch on a side adjacent to each other in two adjacent edge seals.
2. The battery according to claim 1, characterized in that The top edge seal includes an edge seal portion and a bending portion, wherein the bending portion is located at a side of the edge seal portion adjacent to the side edge seal, the edge seal portion is attached to the top of the battery cell, and the bending portion is bent away from the top of the battery cell compared to the edge seal portion; The first portion of the side seal is attached to the side of the battery cell, the second portion of the side seal extends out of the top of the battery cell, and the folding portion includes the bent portion and the second portion; Between two adjacent battery cells, along the thickness direction of the battery cell, the widths of the bent portion and the second portion are both less than or equal to W3.
3. The battery according to claim 2, characterized in that Between two adjacent battery cells, the maximum length of the folded portion extending from the top of the battery cell is L1, the length of the first portion is L2, and L1+L2<L2+W1.
4. The battery according to claim 3, characterized in that Between two adjacent battery cells, the maximum lengths of the bent portion and the second portion are both less than or equal to L1.
5. The battery according to claim 2, characterized in that The edge sealing comprises an edge sealing body and a sealing portion, wherein the sealing portion is located in the edge sealing body and is distributed along the circumference of the edge sealing body; Along the length direction of the edge sealing body, the distance between the edge of the edge sealing body and the sealing portion is H1, and along the width direction of the edge sealing body, the distance between the edge of the edge sealing body and the sealing portion is H2; The difference in width between the edge sealing portion and the bent portion is H3, the difference in width between the first portion and the second portion is H4, H3≤H1, H4≤H2.
6. The battery according to any one of claims 1 to 4, characterized in that The battery further includes an insulating portion, which is at least arranged on an inner wall of the notch.
7. The battery according to claim 6, characterized in that The insulating part includes insulating adhesive tape and / or insulating coating.
8. The battery according to any one of claims 1 to 4, characterized in that The plurality of battery cells include a first battery cell and a second battery cell, the edge seal provided on the first battery cell is set as a first edge seal, and the edge seal provided on the second battery cell is set as a second edge seal; The first side of the first edge seal is adjacent to the first side of the second edge seal, and the second side of the first edge seal is away from the second side of the second edge seal; On the first side of the first edge seal, the maximum width of the folded portion is W3, and on the second side of the first edge seal, the maximum width of the folded portion is W5, W5>W3; On a first side of the second edge seal, the maximum width of the folded portion is W3 , and on a second side of the second edge seal, the maximum width of the folded portion is W5 .
9. The battery according to any one of claims 1 to 4, characterized in that The plurality of battery cells include a first battery cell and a second battery cell, the edge seal provided on the first battery cell is set as a first edge seal, and the edge seal provided on the second battery cell is set as a second edge seal; The first side of the first edge seal is adjacent to the first side of the second edge seal, and the second side of the first edge seal is away from the second side of the second edge seal; On the first side of the first edge seal and the second side of the first edge seal, the maximum width of the folded portion is W3; On the first side of the second edge seal and the second side of the second edge seal, the maximum width of the folded portion is W3.
10. An electronic device, characterized in that: include: A battery as claimed in any one of claims 1 to 9.