Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment. The battery comprises a top cover and a battery cell, a tab extends out of the first end surface of the battery cell, and the tab is bent from the first end surface to form a bent part; the top cover is arranged on the side, away from the battery cell, of the electrode lug, an insulated supporting piece is arranged on the face, facing the battery cell, of the top cover, at least part of the supporting piece is located between the top cover and the electrode lug, and the supporting piece is arranged close to the bent part so as to at least support the bent part. Compared with the prior art, the supporting piece has a relatively good supporting effect on the bent part of the tab, so that in the assembling process, the supporting piece at least can provide supporting force for the bent part of the tab when the battery cell is turned over and folded, and the supporting force at least can balance the force borne by the bent part of the tab, so that the phenomenon that the tab is broken is avoided to a certain extent, and the reliability of the battery cell is improved. Particularly, the bending part of the tab can be prevented from being broken, and the assembly yield of the battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery and electric equipment. BACKGROUND

[0002] The lithium battery usually includes a top cover, an adapter piece and a roll core, the roll core has a tab extending therefrom, and the tab is connected to a pole on the top cover through the adapter piece.

[0003] Generally, after the adapter piece is connected to the tab and the pole, the roll core needs to be folded towards the adapter piece to make the tab located between the top cover and the roll core, so as to be assembled into the shell of the lithium battery.

[0004] However, during the assembly of the lithium battery, the tab is prone to breakage when the roll core is folded, resulting in a low yield of the lithium battery. SUMMARY

[0005] Therefore, the utility model embodiment is committed to providing a battery and electric equipment to solve the technical problem that the tab is prone to breakage when the roll core is folded.

[0006] In a first aspect, the utility model provides a battery, which comprises a top cover and an electric core.

[0007] The first end face of the electric core has a tab extending therefrom, and the tab is bent from the first end face to form a bent part.

[0008] The top cover is arranged on the side of the tab away from the electric core, and the side of the top cover facing the electric core is provided with an insulating support, at least part of the support is located between the top cover and the tab, and the support is arranged close to the bent part to support the bent part.

[0009] Optionally, in the length direction of the top cover, the size of the support is not less than the size of the tab, and the orthographic projection of the bent part on the top cover is located in the orthographic projection area of the support on the top cover.

[0010] Optionally, the support comprises a connecting part and a supporting part connected thereto.

[0011] The connecting part is connected to the top cover and extends towards the electric core, the supporting part is connected to the end of the connecting part away from the top cover and extends in the width direction of the top cover, the supporting part is located between the top cover and the electric core and is used to abut against the tab to support the bent part.

[0012] Optionally, a gap is formed between the side of the support part facing the top cover and the top cover, and the size of the gap in the thickness direction of the top cover is not less than the size of the adapter tab and / or the pole post on the side of the top cover facing the battery cell.

[0013] Optionally, the battery further comprises an insulating separator;

[0014] The separator is located on the side of the tab facing the battery cell and is connected with the support part, and the projection of the part of the tab other than the bent part on the battery cell is located in the projection area of the separator on the battery cell, so as to at least shield the part of the tab opposite to the battery cell.

[0015] Optionally, the separator comprises a separator main body and at least one elastic part;

[0016] The separator main body is connected with the support part and is used for shielding the part of the tab opposite to the battery cell, and the elastic part is arranged at least on one side of the separator main body in the width direction and is used for abutting against the bent part.

[0017] Optionally, the side of the elastic part facing the bent part is convexly arranged towards the bent part and is smoothly transitioned.

[0018] Optionally, the side of the support part away from the top cover has a connecting groove, and at least part of the separator is located in the connecting groove in the thickness direction of the top cover.

[0019] Optionally, the top cover comprises a top cover sheet and an insulating part;

[0020] The insulating part is arranged on the side of the top cover sheet facing the battery cell, and the support part is arranged on the side of the insulating part away from the top cover sheet.

[0021] In the second aspect, the utility model provides a kind of electric equipment, comprising the battery as described above.

[0022] The battery and electrical equipment provided by the present invention are such that an insulating support member is provided on a side of the top cover facing the battery cell, so that at least part of the support member is located between the top cover and the pole ear, and the support member is provided close to the bent portion of the pole ear, so that the support member can at least support the bent portion of the pole ear. With this arrangement, since the support member is located between the top cover and the pole ear, the support member can provide supporting force to the pole ear, especially has a good supporting effect on the bent portion of the pole ear. Based on this, during the assembly process, the support member can at least provide supporting force to the bent portion of the pole ear when the battery cell is flipped and folded together. The supporting force can at least balance the force exerted on the bent portion of the pole ear, thereby avoiding the occurrence of breakage of the pole ear to a certain extent, especially avoiding the breakage of the bent portion of the pole ear, thereby improving the assembly yield of the battery.

[0023] At the same time, the support of the pole ear by the support member has a certain supporting and protective effect on the pole ear, making the position and structure of the pole ear more stable, thereby to a certain extent avoiding the phenomenon of the pole ear breaking during the transportation of the battery, and then avoiding the phenomenon of the pole ear being inserted into the battery cell due to breaking and causing a short circuit, thereby improving the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A partial exploded view of a top cover of a battery according to an embodiment of the present invention from a first perspective;

[0025] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0026] Figure 3 A partial exploded view of a top cover of a battery according to an embodiment of the present invention from a second perspective;

[0027] Figure 4 This is a schematic structural diagram of a separator of a battery according to an embodiment of the present utility model;

[0028] Figure 5 This is an assembly diagram of a top cover and a separator of a battery according to an embodiment of the present utility model;

[0029] Figure 6 This is an axonometric view of a battery according to an embodiment of the present invention, wherein the top cover is connected to the tab before the battery cell is assembled;

[0030] Figure 7 for Figure 6 Enlarged view of middle part B;

[0031] Figure 8 This is a schematic diagram of the assembly of the top cover and the tab of the battery according to one embodiment of the present invention before the battery cells are assembled;

[0032] Figure 9 The top cover of the battery is assembled with the pole lug after the cell is combined, and the assembling diagram is shown in an embodiment of the utility model.

[0033] 1, top cover; 11, top cover sheet; 12, insulating piece; 2, supporting piece; 21, connecting part; 22, supporting part; 3, separating piece; 31, separating main body; 32, elastic part; 4, connecting groove; 5, gap; 6, mounting hole; 7, pole column; 8, adapter sheet; 20, cell; 201, pole lug. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0035] Referring to Figures 1 to 9 The embodiment provides a battery, which comprises a top cover 1 and a cell 20.

[0036] The cell 20 is provided with a pole lug 201 at the first end face, and the pole lug 201 is bent to form a bent part at the first end face.

[0037] Specifically, referring to Figures 1 to 9 The top cover 1 is arranged on the side of the pole lug 201 away from the cell 20, and the side of the top cover 1 facing the cell 20 is provided with the insulating supporting piece 2; at least part of the supporting piece 2 is located between the top cover 1 and the pole lug 201, and the supporting piece 2 is arranged close to the bent part of the pole lug 201 to support at least the bent part of the pole lug 201.

[0038] By arranging the supporting piece 2 on the side of the top cover 1 facing the cell 20, at least part of the supporting piece 2 is located between the top cover 1 and the pole lug 201, and the supporting piece 2 is arranged close to the bent part of the pole lug 201; thus, the supporting piece 2 has a supporting effect on the pole lug 201 during the assembly of the battery, such as when the cell 20 is folded to combine the cells; the supporting force provided by the supporting piece 2 on the pole lug 201 is balanced with other forces acting on the pole lug 201; therefore, the pole lug 201 is stably supported by the supporting piece 2, especially the bent part of the pole lug 201, and the supporting effect is good; thus, the phenomenon of the pole lug 201 being broken is avoided to a certain extent, especially the phenomenon of the bent part of the pole lug 201 being broken, and the assembly yield of the battery is improved.

[0039] Meanwhile, the support member 2 is an insulating support member, and since the support member 2 is located between the top cover 1 and the tab 201, the support member 2 can support the tab 201 without interfering with the electrical connection of the tab 201, and has high practicability.

[0040] In specific implementation, the support member 2 can be made of polyethylene, polycarbonate, polypropylene or the like, and has high strength and good corrosion resistance.

[0041] In some implementations, the support member 2 can be integrally formed with the top cover 1, and has good integrity, high structural strength, and good support and load bearing effect on the tab 201. Of course, in other implementations, the support member 2 can be connected to the top cover 1 by welding, bonding or the like.

[0042] Moreover, the support member 2 located between the top cover 1 and the tab 201 can also support the top cover 1 after the cell 20 is folded, thereby avoiding the sinking of the top cover 1 to some extent, especially avoiding the sinking of the top cover 1 on the side where the bent part of the tab 201 is located, and helping to prolong the service life of the top cover 1.

[0043] The battery provided in the embodiment is provided with the insulating support member 2 on the side of the top cover 1 facing the cell 20, at least part of the support member 2 is located between the top cover 1 and the tab 201, and the support member 2 is arranged close to the bent part of the tab 201, so that the support member 2 can support at least the bent part of the tab 201. Due to the arrangement of the support member 2 between the top cover 1 and the tab 201, the support member 2 can provide support to the tab 201, especially to the bent part of the tab 201. During the assembly process, the support member 2 can provide support to at least the bent part of the tab 201 when the cell 20 is folded, and the support can at least balance the force acting on the bent part of the tab 201, thereby avoiding the fracture of the tab 201 to some extent, especially avoiding the fracture of the bent part of the tab 201, and improving the assembly yield of the battery.

[0044] Meanwhile, the support member 2 can support the tab 201, and has a certain support and protection effect on the tab 201, so that the position and structure of the tab 201 are more stable, thereby avoiding the fracture of the tab 201 during the transportation of the battery to some extent, and further avoiding the short circuit caused by the fracture of the tab 201 and the insertion of the tab 201 into the cell 20, and improving the safety performance of the battery.

[0045] Reference Figure 6 and Figure 7 As shown in FIGS. 1 to 3, in some embodiments, the support member 2 is arranged along the length direction of the top cover 1 (referring to the direction along the arrow A in FIG. 1). Figure 6 and Figure 7 In the X direction), the size of the support member 2 is not less than the size of the tab 201, and the orthographic projection of the bent portion of the tab 201 on the top cover 1 is located within the orthographic projection area of ​​the support member 2 on the top cover 1.

[0046] That is to say, in the length direction of the top cover 1, the support member 2 is arranged at least between the bent portion of the pole ear 201 and the top cover 1, so that it can be ensured that the area between the bent portion of the pole ear 201 and the top cover 1 is arranged with the support member 2, so that the support member 2 can form an overall support for the bent portion in the length direction of the top cover 1, further avoiding the phenomenon of the bent portion breaking when the battery cell 20 is folded and closed, so that the battery assembly yield is higher.

[0047] refer to Figure 2 、 Figure 7 and Figure 9 As shown, in some embodiments, the support member 2 includes a connecting portion 21 and a supporting portion 22 connected to each other, the connecting portion 21 is connected to the top cover 1 and extends toward the direction close to the battery cell 20, and the supporting portion 22 is connected to the end of the connecting portion 21 away from the top cover 1 and extends along the width direction of the top cover 1 (reference Figure 1 The support portion 22 extends in the Y direction) between the top cover 1 and the battery cell 20, and is used to abut against the tab 201 to at least support the bent portion.

[0048] That is, the support member 2 includes a connecting portion 21 and a supporting portion 22. The connecting portion 21 is connected to the side of the top cover 1 facing the battery cell 20 and is arranged near the bent portion of the tab 201. The connecting portion 21 extends from the top cover 1 to the battery cell 20. The supporting portion 22 is connected to the end of the connecting portion 21 facing away from the top cover 1 and extends inward along the width direction of the top cover 1 to be stacked between the top cover 1 and the battery cell 20. Specifically, the supporting portion 22 is located between the top cover 1 and the tab 201 to support the tab 201. With this design, the connecting portion 21 and the supporting portion 22 together form an L-shaped support member 2, which has a simple structure, is easy to manufacture, and has a good supporting effect on the tab 201.

[0049] refer to Figure 9 As shown, the connection portion 21 can ensure that the distance between the top cover 1 and the battery cell 20 is relatively stable, thereby providing a relatively stable space for the tab 201, making the structure of the tab 201 stable and reliable. The support portion 22 is abutted against the tab 201, increasing the contact area with the tab 201, providing better load-bearing performance for the tab 201, and has the effect of gathering and aggregating the bent portion when the battery cell 20 is folded and closed, further avoiding the occurrence of fracture in the bent portion, thereby improving the assembly yield rate.

[0050] In a specific implementation, the connecting portion 21 and the supporting portion 22 can be integrally formed, for example, to have good integrity, high structural strength, and good load bearing performance for the tab 201. Of course, the connecting portion 21 and the supporting portion 22 can also be welded or bonded together.

[0051] Referring to Figure 2 and Figure 7 , in some embodiments, the side of the supporting portion 22 facing the top cover 1 has a gap 5 with the top cover 1, and in the thickness direction of the top cover 1 (referring to the Z direction in Figure 2 , the size of the gap 5 is not less than the size of the adapter tab 8 and / or the pole 7 exposed on the side of the top cover 1 facing the battery cell 20.

[0052] That is, the supporting portion 22 is spaced apart from the top cover 1, and as shown in Figure 2 , Figure 7 and Figure 9 , in the thickness direction of the top cover 1, the gap 5 between the supporting portion 22 and the top cover 1 can at least accommodate the adapter tab 8 and / or the pole 7 for connecting with the tab 201, so that the supporting portion 22 does not interfere with the connection of the tab 201.

[0053] In some implementations, if the tab 201 is directly connected to the pole 7, in the thickness direction of the top cover 1, the gap 5 between the supporting portion 22 and the top cover 1 is not less than the size of the pole 7 exposed between the top cover 1 and the battery cell 20, facilitating the connection of the tab 201 to the pole 7.

[0054] In other implementations, if the tab 201 needs to be connected to the pole 7 through the adapter tab 8, in the thickness direction of the top cover 1, the gap 5 between the supporting portion 22 and the top cover 1 is not less than the sum of the thickness of the adapter tab 8 and the size of the pole 7 exposed between the top cover 1 and the battery cell 20, facilitating the connection of the tab 201 to the pole 7 through the adapter tab 8.

[0055] Referring to Figure 1 , Figures 3 to 5 , Figure 8 and Figure 9 , in some embodiments, the battery further includes an insulating partition 3 located on the side of the tab 201 facing the battery cell 20 and connected to the supporting portion 2, and the projection of the part of the tab 201 other than the bent portion on the battery cell 20 is located within the projection area of the partition 3 on the battery cell 20, to at least shield the part of the tab 201 opposite to the battery cell 20.

[0056] The insulating partition 3 is connected on the support 2, and is located between the tab 201 and the first end surface of the battery cell 20. The tab 201 is covered by the partition 3, and the first end surface of the battery cell 20 is effectively separated from the tab 201. The partition 3 protects the battery cell 20, and avoids the tab 201 from being inserted into the battery cell 20.

[0057] In some embodiments, the two ends of the support 2 are exposed outside the tab 201 in the length direction of the top cover 1, and the partition 3 is connected on the support 2.

[0058] In some embodiments, the partition 3 is connected on the side of the top cover 1 facing the battery cell 20, and covers the tab 201.

[0059] In some embodiments, the partition 3 is made of polyethylene, polycarbonate, polypropylene or the like, and has high strength and good corrosion resistance.

[0060] Reference Figures 3 to 5 , Figure 8 and Figure 9 In some embodiments, the partition 3 includes a partition body 31 and at least one elastic part 32. The partition body 31 is connected with the support 2, and covers the part of the tab 201 opposite to the battery cell 20. The elastic part 32 is arranged on at least one side of the partition body 31 in the width direction, and is in contact with the bent part of the tab 201. The partition 3 has simple structure, is easy to manufacture, is convenient to connect with the support 2, and has good covering effect on the tab 201.

[0061] The partition body 31 covers the tab 201, and separates the first end surface of the battery cell 20 from the tab 201. The elastic part 32 is in contact with the bent part of the tab 201. When the battery cell is folded, the elastic part 32 not only guides the bent part, but also gathers the bent part, and avoids the bent part from being broken.

[0062] In some embodiments, the side of the elastic part 32 facing the bent part is convex and smooth. The elastic part 32 has better guiding and gathering effects on the bent part, is convenient to assemble, and has high assembly yield.

[0063] Reference Figure 2 and Figure 7As shown in some embodiments, the side of the support 2 away from the top cover 1 has a connecting groove 4, and the at least partial partition 3 is located in the connecting groove 4 along the thickness direction of the top cover 1.

[0064] By providing the connecting groove 4 on the support 2, the side of the partition 3 towards the bending part of the tab 201 is connected in the connecting groove 4, which increases the contact area between the partition 3 and the support 2, and makes the connection strength and stability between the two better.

[0065] At the same time, by providing the connecting groove 4 on the support 2, the contact area between the support 2 and the tab 201 is also increased, and the supporting effect of the support 2 on the tab 201 is enhanced, further avoiding the tab from being broken.

[0066] Specifically, the connecting groove 4 can be a stepped groove recessed towards the side of the top cover 1.

[0067] In some implementations, the partition 3 can be connected in the connecting groove by means of hot melting, clamping, or gluing.

[0068] Specifically, the elastic part 32 is connected in the connecting groove 4, which is convenient for connection and stable and reliable in connection.

[0069] Reference Figure 5 , Figure 8 and Figure 9 As shown in some embodiments, the top cover 1 includes a top cover sheet 11 and an insulating part 12, the insulating part 12 is arranged on the side of the top cover sheet 11 facing the battery cell 20, and the support 2 is arranged on the side of the insulating part 12 away from the top cover sheet 11, which is simple in structure and easy to manufacture.

[0070] Specifically, the top cover sheet 11 can be made of a metal material, such as aluminum, which has high structural strength.

[0071] The insulating part 12 is located between the top cover sheet 11 and the first end surface of the battery cell 20, so that the top cover sheet 11 and the first end surface of the battery cell 20 can be separated by the insulating part 12, and an insulation effect is achieved between the two.

[0072] The insulating part 12 can be made of polyethylene, polycarbonate, polypropylene, or the like.

[0073] In some implementations, the support 2 can be integrally formed with the insulating part 12, which has good integrity, high structural strength, and good load bearing on the tab 201.

[0074] Of course, in other implementations, the support 2 can also be connected to the insulating part 12 by welding, bonding, or the like.

[0075] This embodiment also provides an electrical device, which includes a battery.

[0076] The battery in this embodiment has the same structure and implementation principle as the battery provided in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here. For details, please refer to the description of the above embodiment.

[0077] In this document, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0078] In this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery, characterized in that: It comprises a top cover (1) and a battery cell (20); A tab (201) extends from a first end surface of the battery cell (20), and the tab (201) is bent from the first end surface to form a bent portion; The top cover (1) is arranged on a side of the tab (201) facing away from the battery cell (20), and an insulating support member (2) is provided on a side of the top cover (1) facing the battery cell (20), at least part of the support member (2) is located between the top cover (1) and the tab (201), and the support member (2) is arranged close to the bent portion to at least support the bent portion.

2. The battery according to claim 1, characterized in that In the length direction of the top cover (1), the size of the support member (2) is not less than the size of the tab (201), and the orthographic projection of the bent portion on the top cover (1) is located within the orthographic projection area of ​​the support member (2) on the top cover (1).

3. The battery according to claim 1, characterized in that The support member (2) comprises a connecting portion (21) and a supporting portion (22) connected to each other; The connecting portion (21) is connected to the top cover (1) and extends in a direction close to the battery cell (20); the supporting portion (22) is connected to an end of the connecting portion (21) that is away from the top cover (1) and extends along the width direction of the top cover (1); the supporting portion (22) is located between the top cover (1) and the battery cell (20) and is used to abut against the tab (201) to at least support the bent portion.

4. The battery according to claim 3, characterized in that A gap (5) is provided between the side of the support portion (22) facing the top cover (1) and the top cover (1), and in the thickness direction of the top cover (1), the size of the gap (5) is not less than the size of the adapter plate (8) and / or the pole (7) on the side of the top cover (1) facing the battery cell (20).

5. The battery according to any one of claims 1 to 4, characterized in that The battery further comprises an insulating separator (3); The separator (3) is located on a side of the pole tab (201) facing the battery cell (20) and is connected to the support member (2), and the projection of the portion of the pole tab (201) other than the bent portion on the battery cell (20) is located within a projection area of ​​the separator (3) on the battery cell (20), so as to shield at least the portion of the pole tab (201) opposite to the battery cell (20).

6. The battery according to claim 5, characterized in that The separator (3) comprises a separator body (31) and at least one elastic portion (32); The separator body (31) is connected to the support member (2) and is used to shield the portion of the tab (201) opposite to the battery core (20); the elastic portion (32) is provided on at least one side in the width direction of the separator body (31) and is used to fit with the bent portion.

7. The battery according to claim 6, characterized in that A side of the elastic portion (32) facing the bending portion is protruded toward the bending portion and has a smooth transition.

8. The battery according to claim 5, characterized in that The support member (2) has a connecting groove (4) on one side facing away from the top cover (1), and at least part of the partition member (3) is located in the connecting groove (4) along the thickness direction of the top cover (1).

9. The battery according to any one of claims 1 to 4, characterized in that The top cover (1) comprises a top cover sheet (11) and an insulating member (12); The insulating member (12) is arranged on a side of the top cover sheet (11) facing the battery core (20), and the supporting member (2) is arranged on a side of the insulating member (12) facing away from the top cover sheet (11).

10. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 9.

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