Battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery, which comprises a battery cell component, the battery cell component comprises a pole piece and a diaphragm, and the pole piece partially extends out of the diaphragm to form a tab; the switching piece is electrically connected with the tab, and a tab transition section is formed at the part, between the switching piece and the diaphragm, of the tab; the two ends of the insulated rubber tape are adhesive layers, the part, located between the two ends, of the insulated rubber tape is a non-adhesive layer, the first end of the insulated rubber tape is bonded with the switching piece, the second end of the insulated rubber tape is connected with the diaphragm, and the non-adhesive layer covers the tab transition section and part of the diaphragm. According to the utility model, the phenomenon of short circuit caused by inverted insertion of the tabs can be eliminated while the insulation protection effect is achieved, and the safety of the battery is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery. BACKGROUND

[0002] In the process of manufacturing the multi-tab roll core structure battery cell, the separator, negative electrode sheet, separator, positive electrode sheet and separator are sequentially stacked layer by layer, and then the battery cell is packaged into a shell. In order to avoid the contact between the outermost tab and the shell, an insulating tape is usually pasted at the connection between the outermost separator and the adapter tab connected to the electrode sheet.

[0003] Since the tab is usually made of a thin conductive foil, the tape will stick the outermost tab and the separator while playing an insulating protection role by using a full-coated tape. Since the adapter tab is arranged at an angle with the separator, the tape has a bending part when connecting the separator and the adapter tab. Under the action of the restoring force of the bending part, the separator is separated from the tab, which may cause the tab to be inserted into the battery cell, and the positive electrode sheet and the negative electrode sheet may be short-circuited, affecting the safety of the battery.

[0004] Therefore, there is a need for a battery to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a battery which can play an insulating protection role while eliminating the short-circuit phenomenon caused by the reverse insertion of the tab and ensuring the safety of the battery.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The battery comprises:

[0008] A cell assembly comprising an electrode sheet and a separator, wherein the electrode sheet partially extends out of the separator to form a tab;

[0009] An adapter tab electrically connected to the tab, wherein the part of the tab between the adapter tab and the separator forms a tab transition section;

[0010] An insulating tape, wherein the two ends of the insulating tape are adhesive layers, the part between the two ends of the insulating tape is a non-adhesive layer, the first end of the insulating tape is bonded to the adapter tab, the second end of the insulating tape is connected to the separator, and the non-adhesive layer covers the tab transition section and part of the separator.

[0011] The utility model has the following advantages:

[0012] The utility model provides a kind of battery, and the cell component includes pole piece and diaphragm, pole piece part extends diaphragm and forms pole lug, adapter piece is electrically connected with the pole lug opposite diaphragm extension, the part of pole lug between adapter piece and diaphragm forms pole lug transition section, the both ends of insulating tape are adhesive layer, the part between both ends is non-adhesive layer, the first end of insulating tape is bonded with adapter piece, the second end of insulating tape is connected with diaphragm, and non-adhesive layer covers pole lug transition section and part diaphragm.Because insulating tape connects diaphragm and adapter piece, and covers pole lug transition section, can play good insulating protection effect.And because insulating tape is non-adhesive layer in bending position, so insulating tape will not open diaphragm, to avoid pole lug reverse insertion into cell causes short circuit, guarantee the safety of battery.

[0013] The utility model provides a kind of battery, including shell and the battery as described above, can eliminate the phenomenon that pole lug reverse insertion causes short circuit while playing the role of insulating protection, guarantee the safety of battery. DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and these drawings for those skilled in the art without creating labor.

[0015] Figure 1 It is the schematic diagram of a kind of battery of the utility model.

[0016] In the drawing:

[0017] 1, diaphragm; 2, pole lug; 3, insulating tape; 31, adhesive layer; 32, non-adhesive layer; 4, adapter piece; 41, weight-reducing groove; 42, extension. DETAILED DESCRIPTION

[0018] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described drawings.

[0019] In the present application, the terms "comprising", "containing", "having" or any other variant thereof are intended to cover non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a …" does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0020] In this application, the terms "connected", "combined", "coupled", "mounted" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection refers to the connection of two parts or components without the need for an intermediate part, and indirect connection refers to the connection of two parts or components with at least one intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0021] In this application, those skilled in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0022] In this application, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the application. In addition, it should also be understood in the context that when referring to one element connected to another element "on" or "below", it can not only be directly connected to another element "on" or "below", but also indirectly connected to another element "on" or "below" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the lower side, the lower left side, the lower right side, the lower front side and the lower back side, etc.

[0023] In the process of assembling the battery, in order to be able to play an insulating protection role while eliminating the short circuit phenomenon caused by the reverse insertion of the tab, and ensure the safety of the battery, as shown in Figure 1 The utility model provides a kind of battery. Battery includes electric core component, adapter piece 4 and insulating adhesive tape 3.

[0024] Among them, electric core component includes pole piece and diaphragm 1, pole piece partially extends diaphragm 1 and forms tab. Adapter piece 4 is electrically connected with opposite tab 2, and the part of tab 2 between adapter piece 4 and diaphragm 1 forms tab transition section. The both ends of insulating adhesive tape 3 are adhesive layer 31, the part between the both ends of insulating adhesive tape 3 is non-adhesive layer 32, the first end of insulating adhesive tape 3 is bonded with adapter piece 4, the second end of insulating adhesive tape 3 is connected with diaphragm 1, and non-adhesive layer 32 covers tab transition section and part of diaphragm 1.

[0025] The insulating tape 3 connects the diaphragm 1 and the adapter piece 4 and covers the tab transition section, thereby achieving good insulation protection. Since the insulating tape 3 has a non-adhesive layer 32 at the bending position and part of the non-adhesive layer 32 covers the diaphragm 1, the insulating tape 3 will not lift the diaphragm 1, thereby avoiding short circuit caused by the tab 2 inserted into the battery cell in reverse and ensuring the safety of the battery.

[0026] In some embodiments, the adapter piece 4 is welded with the tab 2, and the first end of the insulating tape 3 completely covers the welding mark of the welding of the adapter piece 4 and the tab 2. By covering the welding mark with the insulating tape 3, the insulation of the welding position of the adapter piece 4 and the tab 2 can be ensured, and the welding mark position can be protected and isolated from the outside world, thereby preventing the position of the welding connection of the adapter piece 4 and the tab 2 from being corroded.

[0027] In some embodiments, the length of the non-adhesive layer 32 covering the diaphragm 1 along the direction of the tab 2 extending relative to the diaphragm 1 is 5mm-10mm. For example, the length of the non-adhesive layer 32 covering the diaphragm 1 can be 5.5mm, 6mm, 6.5mm, or 10mm. By limiting the length range of the non-adhesive layer 32 covering the diaphragm 1, the deformation force of the bending position of the insulating tape 3 can be reduced, and the pulling effect of the second end of the insulating tape 3 on the diaphragm 1 can be reduced, thereby preventing the diaphragm 1 from being lifted.

[0028] In some embodiments, the length L2 of the insulating tape 3 along the direction of the tab 2 extending relative to the diaphragm 1 is 50mm-55mm. For example, the length of the insulating tape 3 can be 50mm, 51mm, 52mm, 53mm, 54mm, or 55mm. By limiting the length range of the insulating tape 3, the effective insulation protection of the adapter piece 4 and the tab 2 can be ensured, the use of the insulating tape 3 can be reduced, the waste of materials can be reduced, and the economy can be improved.

[0029] In some embodiments, the length L3 of the non-adhesive layer 32 covering the adapter piece 4 along the direction of the tab 2 extending relative to the diaphragm 1 is 0mm-3mm. For example, the length of the non-adhesive layer 32 covering the adapter piece 4 can be 1mm, 2mm, or 3mm. By limiting the length range of the non-adhesive layer 32 covering the adapter piece 4, the area of the adhesive layer 31 connected with the adapter piece 4 can be reduced, and the length of the adhesive layer 31 can be reduced while protecting the adapter piece 4.

[0030] In some embodiments, the length L4 of the first end of the insulating tape 3 bonded with the adapter piece 4 along the direction of the tab 2 extending relative to the diaphragm 1 is 5mm-20mm. For example, the length of the first end of the insulating tape 3 bonded with the adapter piece 4 can be 5mm, 10mm, 15mm, or 20mm. By limiting the length of the first end of the insulating tape 3 bonded with the adapter piece 4, the bonding effect of the first end of the insulating tape 3 with the adapter piece 4 can meet the requirements.

[0031] In some embodiments, the adapter piece 4 is provided with a weight-reducing groove 41. By providing the weight-reducing groove 41, the weight of the adapter piece 4 can be reduced, and the use of the material of the adapter piece 4 can be saved, thereby improving the economy. In the present embodiment, the weight-reducing groove 41 is a U-shaped groove, and in other embodiments, the weight-reducing groove 41 can be designed in the shape of a long strip or other shapes, without being limited here.

[0032] In some embodiments, the first end of the partial insulating tape 3 is located in the weight-reducing groove 41. By the above arrangement, the end of the adapter piece connected with the tab 2 can be completely covered by the insulating tape 3, thereby ensuring the effective insulation protection of the adapter piece 4.

[0033] In some embodiments, the adapter piece 4 is provided with an extension 42 at one end, and the extension 42 is used to connect with the electrode of the battery. By providing the extension 42, the electrode can be easily welded with the adapter piece 4. In the present embodiment, the extension 42 is an integrated structure with the adapter piece 4, which is convenient for manufacturing and can ensure the conductivity of the extension 42 and the adapter piece 4.

[0034] In some embodiments, the battery comprises two electric cores arranged opposite to each other, and the adapter piece 4 is located between the two electric cores, and the tabs 2 of the same polarity of the two electric cores are connected with the adapter piece 4. Specifically, the tabs 2 of the two electric cores are connected with the part of the adapter piece 4 located on both sides of the weight-reducing groove 41. By using one adapter piece 4 to connect the two electric cores, the number of the adapter pieces 4 can be reduced, and the capacity of the battery can be improved.

[0035] In some embodiments, the adhesive layer 31 has a color, and the non-adhesive layer 32 is transparent. In the present embodiment, the adhesive layer 31 is blue. By designing the adhesive layer 31 to have a color and the non-adhesive layer 32 to be transparent, the assembler can easily observe during the process of assembling and pasting the insulating tape 3 on the battery, so that the insulating tape 3 can be correctly and efficiently pasted between the separator 1 and the adapter piece 4. In other embodiments, the color of the adhesive layer 31 can be red, yellow, green, etc., as long as the color is easy to identify, without being limited here.

[0036] In some embodiments, the insulating tape 3 is made of insulating plastic, and the insulating tape 3 is formed by coating the adhesive on the insulating plastic at intervals. In order to facilitate use, a plurality of insulating tapes 3 can be wound into a tape roll, and a point-shaped cutting line can be processed at the adjacent insulating tapes 3 according to the length of the insulating tape 3 used. When assembling the electric core, the assembler only needs to tear the insulating tape 3 along the cutting line for use. By using the above method, the manufacturing and use of the insulating tape 3 are facilitated.

[0037] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A battery, characterized by, The battery comprises: an electric core assembly comprising a tab and a separator (1), the tab partially protruding from the separator (1) to form a tab lug; a transition tab (4) electrically connected with the tab lug (2), the part of the tab lug (2) between the transition tab (4) and the separator (1) forming a tab lug transition section; an insulating tape (3) having two adhesive layers (31) at both ends thereof, a non-adhesive layer (32) between the two adhesive layers (31), the first end of the insulating tape (3) being bonded to the transition tab (4), the second end of the insulating tape (3) being connected to the separator (1), and the non-adhesive layer (32) covering the tab lug transition section and part of the separator (1).

2. The battery of claim 1, wherein, The transition tab (4) is welded to the tab lug (2), and the first end of the insulating tape (3) completely covers the welding mark of the welding of the transition tab (4) to the tab lug (2).

3. The battery of claim 1, wherein, The length of the non-adhesive layer (32) covering the separator (1) along the protruding direction of the tab lug (2) relative to the separator (1) is 5-10 mm.

4. The battery of claim 1, wherein, The length of the insulating tape (3) along the protruding direction of the tab lug (2) relative to the separator (1) is 50-55 mm.

5. The battery of claim 1, wherein, The length of the non-adhesive layer (32) covering the transition tab (4) along the protruding direction of the tab lug (2) relative to the separator (1) is 0-3 mm.

6. The battery of claim 1, wherein, The length of the first end of the insulating tape (3) bonded to the transition tab (4) along the protruding direction of the tab lug (2) relative to the separator (1) is 5-20 mm.

7. The battery of claim 1, wherein, The transition tab (4) is provided with a weight-reducing groove (41).

8. The battery of claim 7, wherein, Part of the first end of the insulating tape (3) is located in the weight-reducing groove (41).

9. The battery of claim 1, wherein, The battery comprises two electric cores arranged opposite to each other, and the transition tab (4) is located between the two electric cores, and the tab lugs (2) of the same polarity of the two electric cores are connected with the transition tab (4).

10. The battery according to any one of claims 1 to 9, characterized in that, The adhesive layer (31) has a color, and the non-adhesive layer (32) is transparent.

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