Battery assembly and electronic equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery assembly and electronic equipment, the battery assembly comprises a battery cell, one end of the battery cell extends along a first direction to form a top edge sealing part, at least one end of the battery cell extends along a third direction to form a side edge sealing part, and the side edge sealing part is bent towards a second direction; the connecting area of the top edge sealing part and the side edge sealing part is bent towards the second direction to form an edge folding part; a step part is formed on one side, deviating from the flanging part, of the battery cell along the second direction; and the protection plate is arranged on the step part, and the projection of the protection plate in the second direction is located in the range of the top sealing edge part. According to the battery assembly provided by the utility model, the protection plate is arranged on the step part, and the projection of the protection plate along the second direction is located in the range of the top sealing edge part, so that compared with the condition that the protection plate is arranged in the battery core top sealing groove, the packaging space in the length direction of the battery assembly can be reduced, and the overall length of the battery assembly is reduced. And under the condition of the same size, the capacity of the battery assembly can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery assembly and electronic equipment. Background Art

[0002] Consumer batteries typically include a protective plate and a battery cell. The protective plate monitors and protects the battery cell. In related technologies, the nickel sheet of the protective plate is welded to the battery cell's tabs. The protective plate is then bent to fit snugly within the battery cell, improving space utilization.

[0003] However, in the related art, the bending direction of the protection plate is consistent with the folding direction of the battery cell, so that the protection plate is set in the top sealing groove of the battery cell, which will occupy the battery length packaging space, resulting in limited battery capacity. Utility Model Content

[0004] In view of this, the present invention provides a battery assembly and an electronic device to solve the problem that the protection plate is disposed in the top sealing groove of the battery cell, occupying the battery length packaging space.

[0005] In a first aspect, the present invention provides a battery assembly, comprising:

[0006] A battery cell, wherein one end of the battery cell extends along the first direction to form a top sealing portion, and at least one end of the battery cell extends along the third direction to form a side sealing portion, and the side sealing portion is bent toward the second direction;

[0007] The connection area between the top sealing portion and the side sealing portion is bent in the second direction to form a folded edge portion; and a step portion is formed on a side of the battery cell away from the folded edge portion along the second direction;

[0008] A protection plate is provided on the step portion, and a projection of the protection plate along the second direction is located within the range of the top sealing edge portion, and the protection plate is electrically connected to the battery cell;

[0009] The second direction is perpendicular to the large surface of the battery cell, and the first direction is perpendicular to the second direction.

[0010] In an optional embodiment, the battery assembly further includes:

[0011] The terminal line is electrically connected to a surface of the protection plate on one side away from the top sealing edge portion along the second direction; the terminal line extends along the first direction toward a side away from the battery cell.

[0012] In an optional embodiment, a tab is provided on one side of the top sealing edge of the battery cell;

[0013] The protection plate includes: a hard plate body and a conductive sheet arranged on the hard plate body; the conductive sheet is electrically connected to the tab.

[0014] In an optional embodiment, the conductive sheet is electrically connected to the tab, and the projection of the hard board body along the second direction is located within the range of the top sealing edge portion. At this time, the projection of the terminal line along the second direction does not overlap with the battery cell.

[0015] In an optional embodiment, the conductive sheet and the terminal wire are respectively arranged on opposite sides of the rigid board body.

[0016] In an optional embodiment, the width of the hard board body along the first direction ranges from 2 mm to 6 mm.

[0017] In an optional embodiment, the battery cell includes a battery cell body, and an end surface of the battery cell body located at one end forming the top sealing portion and facing away from the folded edge portion along the second direction is defined as a first end surface;

[0018] The surface of the top sealing edge portion facing away from the folding edge portion along the second direction is defined as the first surface;

[0019] A step portion is formed in an area sandwiched between the first end surface and the first surface.

[0020] In an optional embodiment, the battery assembly further includes: an anti-collision pad; the anti-collision pad is arranged between the protection plate and the first end surface.

[0021] In an optional embodiment, the battery assembly further includes: a head insulating layer and double-sided tape, wherein the double-sided tape is suitable for bonding the head insulating layer to the protective plate.

[0022] In an optional embodiment, the battery assembly further includes: a filling pad, arranged on the side of the protective plate away from the top sealing edge portion along the second direction; the outer surface of the filling pad along the second direction away from the protective plate is flush with the outer surface of the battery cell.

[0023] In an optional embodiment, the filling pad includes a first filling pad located on at least one side of the terminal line along the third direction; and / or the filling pad includes a second filling pad located on the side of the terminal line away from the top sealing edge along the second direction.

[0024] Advantageous Effects: Arranging the protective plate on the stepped portion, with its projection along the second direction located within the top seal edge, reduces the packaging space along the length of the battery assembly and the overall length of the battery assembly compared to arranging the protective plate in the cell top seal groove. Furthermore, under the same dimensional conditions, this can further increase the capacity of the battery assembly.

[0025] In a second aspect, the present invention further provides an electronic device, comprising: the battery assembly as described above.

[0026] Because the electronic device includes a battery assembly and has the same effect as the battery assembly, it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of a battery assembly of the present invention;

[0029] Figure 2 This is an exploded schematic diagram of the battery assembly of the present utility model;

[0030] Figure 3 It is a partial enlarged view of the battery cell of the utility model and a schematic diagram of the protection board;

[0031] Figure 4 This is a front view of the battery cell and the anti-collision pad of the utility model in the assembled state;

[0032] Figure 5 This is a front view of the protection plate assembly of the utility model;

[0033] Figure 6 This is a side view of the protective plate of the utility model;

[0034] Figure 7 This is a front view of the conductive sheet and the tab connected to each other in the utility model;

[0035] Figure 8 for Figure 7 Schematic diagram of the conductive sheet after bending on the foundation;

[0036] Figure 9 for Figure 8 Schematic diagram of the insulation layer covering the head on the foundation;

[0037] Figure 10 for Figure 9 Schematic diagram of the base with the rigid plate body bent to the step portion;

[0038] Figure 11 for Figure 10 Schematic diagram of the padding attached to the outside of the hard board body on the foundation;

[0039] Figure 12 for Figure 11 Schematic diagram of the outer film covering the foundation.

[0040] Description of reference numerals:

[0041] 100. Battery assembly; 1. Battery cell; 10. Battery cell body; 11. Step portion; 12. Tab; 13. Folding portion; 14. Top sealing portion; 141. First surface; 15. Side sealing portion; 16. First end surface;

[0042] 2. Protective plate; 21. Hard board body; 22. Conductive sheet;

[0043] 3. Filling pad; 31. First filling pad; 32. Second filling pad; 4. Anti-collision pad; 5. Terminal wire; 51. Connector; 6. Head insulation layer; 7. Double-sided tape; 8. Outer film. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] The following combination Figures 1 to 12 , describing the embodiments of the present utility model.

[0049] In order to understand the technical solution of the present invention more clearly, the directional relationship of the present invention is first defined. Figure 2 、 Figure 3 As shown, the first direction refers to the length direction of the battery cell 1, the second direction refers to the thickness direction of the battery cell 1, and the third direction refers to the width direction of the battery cell 1. The second direction is perpendicular to the large surface of the battery cell 1, and the large surface of the battery cell 1 refers to the outer surface with the largest area among the various outer surfaces of the battery cell 1. The first direction, the second direction, and the third direction are perpendicular to each other.

[0050] According to an embodiment of the present invention, on one hand, a battery assembly 100 is provided, comprising:

[0051] The battery cell 1 includes a top sealing portion 14 extending from one end of the battery cell 1 along the first direction, a side sealing portion 15 extending from at least one end of the battery cell 1 along the third direction, and the side sealing portion 15 is bent toward the second direction; the connecting area between the top sealing portion 14 and the side sealing portion 15 is bent toward the second direction to form a folded portion 13; and a step portion 11 is formed on a side of the battery cell 1 facing away from the folded portion 13 along the second direction.

[0052] The protection plate 2 is provided on the step portion 11, and the projection of the protection plate 2 along the second direction is located within the range of the top sealing edge portion 14, and the protection plate 2 is electrically connected to the battery cell 1;

[0053] The second direction is perpendicular to the large surface of the battery cell 1 , and the first direction is perpendicular to the second direction.

[0054] The battery cell 1 is extended along one end of the first direction to form a top sealing edge portion 14, combined with Figure 3 As shown, the top seal 14 is located relatively centrally along the second direction of the battery cell 1. Since the battery cell 1 is formed with a side seal 15 extending from at least one end along the third direction, the side seal 15 extends beyond the edge of the battery cell 1. To reduce space occupation, the side seal 15 is bent in the second direction. In this embodiment, the connecting area between the top seal 14 and the side seal 15 is bent in the second direction to form a folded edge 13. The area enclosed by the side of the top seal 14 where the folded edge 13 is formed and the battery cell 1 is defined as the battery cell top seal groove.

[0055] A step portion 11 is formed on the side of the battery cell 1 away from the folded edge portion 13 along the second direction. In this embodiment, along the first direction, the bottom surface of the battery cell 1 on the side of the battery cell top sealing groove is higher than the step portion 11.

[0056] In some embodiments, the battery cell 1 includes a battery cell body 10, and the end face of the battery cell body 10 located at one end forming the top sealing edge portion 14 and away from the folding edge portion 13 along the second direction is defined as a first end face 16; the surface of the top sealing edge portion 14 away from the folding edge portion 13 along the second direction is defined as a first surface 141; the area where the first end face 16 and the first surface 141 are jointly sandwiched forms a step portion 11.

[0057] Arranging the protective plate 2 on the stepped portion 11, with its projection along the second direction located within the top sealing edge 14, can reduce the packaging space in the longitudinal direction of the battery assembly and the overall length of the battery assembly, compared to arranging the protective plate 2 in the battery cell top sealing groove. Furthermore, under the same dimensional conditions, this can further increase the capacity of the battery assembly.

[0058] In addition, since the top sealing edge portion 14 is bent toward the second direction to form the folded edge portion 13, and the two ends of the step portion 11 along the third direction are not blocked by the folded edge portion 13, during the processing of the battery assembly, the folded edge portion 13 will not interfere with the bending of the protective plate 2, thereby reducing the probability of error and improving assembly efficiency.

[0059] Since the protective plate 2 has a state before and after bending during the processing of the battery assembly; the position of the protective plate 2 is different in different states. In order to more clearly describe the positional relationship of the protective plate 2 in different states, the following will combine the different states of the protective plate 2 to describe the technical solution.

[0060] In some embodiments, combined Figure 2 、 Figure 5 、 Figure 10 As shown, the battery assembly 100 further includes:

[0061] The terminal wire 5 is electrically connected to the surface of the protection plate 2 along the second direction away from the top sealing edge 14 ; when the protection plate 2 is in the bent state, the terminal wire 5 extends along the first direction toward the side away from the battery cell 1 .

[0062] In this embodiment, since the terminal wire 5 is electrically connected to the surface of the protective plate 2 along the second direction away from the top sealing edge portion 14, the terminal wire 5 will extend in a specific direction after being connected to the protective plate 2. At this time, it is not advisable to bend the terminal wire 5 in the opposite direction, otherwise it will easily cause the connection between the terminal wire 5 and the protective plate 2 to break. Therefore, in order to cooperate with the folding of the protective plate 2 and ensure that the terminal wire 5 extends along the first direction toward the side away from the battery cell 1 when the protective plate 2 is in the bent state, it is necessary to reasonably set the direction of the terminal wire 5.

[0063] Combine Figure 7 As shown, when the protection plate 2 and the tab are welded, the terminal wire 5 extends in the same direction as the bent edge portion 13 along the second direction.

[0064] Combine Figure 8 As shown, when the conductive sheet 22 is bent, the protection plate 2 is in the top sealing groove of the battery cell, the terminal line 5 extends along the first direction, and the projection of the terminal line 5 along the second direction overlaps with the battery cell 1.

[0065] Combine Figure 10 As shown, the protection plate 2 is folded 180 degrees and positioned at the step 11. The terminal wire 5 then extends in a first direction toward a side away from the battery cell 1. This facilitates subsequent electrical connection of the terminal wire 5 to an external circuit.

[0066] In some embodiments, the protective plate 2 has a pre-bending state and a post-bending state; in the pre-bending state, the conductive sheet 22 is electrically connected to the pole ear 12, and the projection of the hard board body 21 along the second direction does not overlap with the top sealing edge 14, at this time the projection of the terminal line 5 along the second direction overlaps with the battery cell 1; in the post-bending state, the conductive sheet 22 is electrically connected to the pole ear 12, and the projection of the hard board body 21 along the second direction is located within the range of the top sealing edge 14, at this time the projection of the terminal line 5 along the second direction does not overlap with the battery cell 1.

[0067] A connector 51 is provided at one end of the terminal line 5 away from the protection board 2 to facilitate connection with an external circuit.

[0068] In some embodiments, the conductive sheet 22 and the terminal wire 5 are respectively disposed on opposite sides of the rigid board body 21, thereby rationally utilizing the space of the rigid board body 21 and avoiding interference.

[0069] In some embodiments, combined Figure 4 、 Figure 6 、 Figure 7 As shown, a tab 12 is provided on one side of the top sealing edge 14 of the battery cell;

[0070] The protection board 2 includes a hard board body 21 and a conductive sheet 22 disposed on the hard board body 21 ; the conductive sheet 22 is electrically connected to the tab 12 .

[0071] The conductive sheet 22 is electrically connected to the tab 12 , so that the protection plate 2 is connected to the battery cell, thereby facilitating monitoring of the battery cell.

[0072] Combine Figure 5 As shown, in this embodiment, the protection board 2, the terminal line 5 and the connector 51 can constitute a protection board assembly. Other electrical components are also provided on the hard board body 21 of the protection board 2 to monitor and protect the battery cells.

[0073] In some embodiments, the battery assembly further includes: a head insulating layer and double-sided tape, wherein the double-sided tape is suitable for bonding the head insulating layer to the protective plate.

[0074] Combine Figure 2 、 Figure 9 When the rigid board body 21 is in a pre-bent state, the head insulating layer 6 is wrapped around the outer side of the rigid board body 21 and covers at least two opposite side surfaces of the rigid board body 21 along the second direction.

[0075] When the rigid board body 21 is in a pre-bending state, the head insulating layer 6 is wrapped around the outer side of the rigid board body 21 . At this time, the rigid board body 21 and the battery cell 1 do not interfere with each other, making it convenient to wrap the head insulating layer 6 .

[0076] In this embodiment, the head insulating layer 6 can be bonded to the hard board body 21 by using a double-sided adhesive tape 7 .

[0077] At the same time, the head insulating layer 6 forms an avoidance gap at the position of the terminal line 5.

[0078] In some embodiments, when the hard board body 21 is in a bent state, the width of the hard board body 21 along the first direction ranges from 2 mm to 6 mm.

[0079] By limiting the width of the rigid board body 21 along the first direction, the rigid board body 21 can be prevented from being too wide and extending too far beyond the top sealing edge 14 , thereby facilitating placement of the protective plate 2 on the stepped portion 11 and ensuring that the projection of the protective plate 2 along the second direction is within the range of the top sealing edge 14 . This reduces the packaging space along the length of the battery assembly and the overall length of the battery assembly. Furthermore, under the same dimensional conditions, the capacity of the battery assembly can be further increased.

[0080] In some embodiments, combined Figure 4 As shown, the battery assembly further includes: an anti-collision pad 4 made of a soft material; the anti-collision pad 4 is arranged between the protection plate 2 and the step portion 11.

[0081] In this embodiment, the anti-collision pad 4 can be a silicone pad. The main function of the silicone pad is to protect the battery cell 1 and prevent the protection plate 2 from accidentally hitting the battery cell 1 and causing damage to the battery cell.

[0082] In some embodiments, combined Figure 11 As shown, the battery assembly also includes: a filling pad 3, which is arranged on the side of the protection plate 2 away from the top sealing edge 14 along the second direction; the outer surface of the filling pad 3 along the second direction away from the protection plate 2 is flush with the outer surface of the battery cell 1.

[0083] In some embodiments, the filling pad 3 includes a first filling pad 31 located on at least one side of the terminal line 5 along the third direction; and / or, the filling pad 3 includes a second filling pad 32 located on the side of the terminal line 5 away from the top sealing edge 14 along the second direction.

[0084] In this embodiment, the filling pad 3 can specifically be foam. The main function of the foam is to fill the step portion 11 along the second direction to prevent the protective plate 2 from being too different in height from the outer surface of the battery cell 1 after being set on the step portion 11, causing the outer film 8 to stick together and form wrinkles later; at the same time, the foam is a soft material and can play a certain protective role for the battery during the drop test.

[0085] In some embodiments, combined Figure 12 As shown, the battery assembly further includes an outer film 8. After assembly, the outer film 8 is coated on the outside of the battery cell 1 and the protection plate 2 to provide insulation protection and facilitate overall packaging.

[0086] According to an embodiment of the present invention, on the other hand, an electronic device is provided, including: the battery assembly as described above.

[0087] Obviously, the above embodiments are merely examples for the purpose of clarity of explanation and are not intended to limit the implementation methods. Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present invention.

Claims

1. A battery assembly, characterized in that: include: A battery cell (1), wherein one end of the battery cell (1) extends in a first direction to form a top sealing portion (14), and at least one end of the battery cell (1) extends in a third direction to form a side sealing portion (15), and the side sealing portion (15) is bent toward a second direction; The connection area between the top sealing portion (14) and the side sealing portion (15) is bent toward the second direction to form a folded portion (13); and a step portion (11) is formed on the side of the battery cell (1) away from the folded portion (13) along the second direction; A protective plate (2) is arranged on the step portion (11), and a projection of the protective plate (2) along the second direction is located within the range of the top sealing edge portion (14), and the protective plate (2) and the battery core (1) are electrically connected; The second direction is perpendicular to the large surface of the battery cell (1), and the first direction is perpendicular to the second direction.

2. The battery assembly according to claim 1, wherein: The battery assembly further comprises: A terminal wire (5) is electrically connected to a surface of the protection plate (2) that is away from the top sealing edge portion (14) along the second direction; the terminal wire (5) extends along the first direction toward a side away from the battery cell (1).

3. The battery assembly according to claim 2, wherein: The battery cell is provided with a tab (12) on one side of the top sealing edge portion (14); The protection plate (2) comprises: a hard plate body (21), and a conductive sheet (22) arranged on the hard plate body (21); the conductive sheet (22) is electrically connected to the tab (12).

4. The battery assembly according to claim 3, characterized in that The conductive sheet (22) is electrically connected to the tab (12), and the projection of the hard board body (21) along the second direction is located within the range of the top sealing edge (14), and the projection of the terminal wire (5) along the second direction does not overlap with the battery core (1).

5. The battery assembly according to claim 3, wherein: The conductive sheet (22) and the terminal wire (5) are respectively arranged on opposite sides of the hard board body (21).

6. The battery assembly according to claim 3, characterized in that The width of the hard board body (21) along the first direction ranges from 2 mm to 6 mm.

7. The battery assembly according to any one of claims 1 to 6, characterized in that: The battery cell (1) comprises a battery cell body (10), wherein an end face of the battery cell body (10) located at one end forming the top sealing portion (14) and facing away from the folding portion (13) along the second direction is defined as a first end face (16); A surface of the top sealing edge portion (14) facing away from the folding edge portion (13) along the second direction is defined as a first surface (141); The area sandwiched between the first end surface (16) and the first surface (141) forms the step portion (11).

8. The battery assembly according to claim 7, characterized in that The battery assembly further comprises: an anti-collision pad (4), wherein the anti-collision pad (4) is arranged between the protection plate (2) and the first end surface (16).

9. The battery assembly according to claim 7, wherein: The battery assembly further comprises: a head insulating layer (6) and a double-sided adhesive tape (7), wherein the double-sided adhesive tape (7) is suitable for bonding the head insulating layer (6) to the protective plate (2).

10. The battery assembly according to any one of claims 2 to 6, characterized in that: The battery assembly further comprises: a filling pad (3) arranged on a side of the protective plate (2) facing away from the top sealing edge portion (14) along the second direction; the outer surface of the filling pad (3) on the side facing away from the protective plate (2) along the second direction is flush with the outer surface of the battery cell (1).

11. The battery assembly according to claim 10, characterized in that The filling pad (3) includes a first filling pad (31) located on at least one side of the terminal line (5) along a third direction; and / or the filling pad (3) includes a second filling pad (32) located on a side of the terminal line (5) away from the top sealing edge (14) along a second direction.

12. An electronic device, characterized in that: A battery assembly comprising the battery assembly according to any one of claims 1 to 11.

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