Battery and electronic equipment

Abstract

The utility model discloses a battery, which comprises a step-type battery cell, a plurality of lead wires, a plurality of lead wires, a plurality of lead wires and a plurality of lead wires, a first double-edgefold is arranged on the side edge of the thicker side of the battery cell, and a second double-edgefold is arranged on the side edge of the thinner side of the battery cell; the secondary edgefold of the first double edgefold is positioned between the battery cell and the primary edgefold of the first double edgefold; and the primary folding edge of the second double folding edge is positioned between the battery cell and the secondary folding edge of the second double folding edge. The battery has the beneficial effects that the first side edge of the battery cell is arranged to be the inner double-folded edge facing the battery cell, and the second side edge of the battery cell is arranged to be the outer double-folded edge deviating from the battery cell, so that the size of the battery in the width direction can be flexibly adjusted, and the size requirement of electronic equipment is met.

Description

Technical Field

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

[0002] Currently, batteries are manufactured in a stepped pattern with varying thicknesses to accommodate the irregular shapes of battery compartments. However, during the manufacturing process, the thinner side of a stepped battery is difficult to fold, or the thickness of the folded side can become greater than the cell thickness, ultimately reducing the battery's energy density. Utility Model Content

[0003] In order to solve the problem that traditional battery structures cannot adapt to the requirements of electronic devices in terms of size and energy density, the purpose of the present utility model is to provide a battery and electronic equipment.

[0004] In one aspect, the present invention provides a battery, comprising:

[0005] A battery cell, wherein the battery cell is a stepped battery cell;

[0006] The side edge of the thicker side of the battery core is provided with a first double folded edge, and the side edge of the thinner side of the battery core is provided with a second double folded edge;

[0007] The secondary fold of the first double fold is located between the battery core and the primary fold of the first double fold;

[0008] The first fold of the second double fold is located between the battery core and the second fold of the second double fold;

[0009] A first insulating tape is wrapped around the outer side of the second double folded edge.

[0010] As a further improvement of the present invention, the battery further comprises:

[0011] A handle is wrapped around the outer side of the first double folded edge.

[0012] As a further improvement of the present invention, a portion of the handle located on the surface of the battery core is provided with a plurality of notches.

[0013] As a further improvement of the present invention, the bonding surface between the handle and the battery cell includes a strong glue area, a glue spot area and a glue-free area arranged in sequence;

[0014] The strong glue area is located on the front side of the battery cell;

[0015] The glue-dispensing area and the glue-free area are located on the back side of the battery core.

[0016] As a further improvement of the present invention, the sum of the widths of the glue-dotting area and the glue-free area is greater than the width of the strong glue area.

[0017] As a further improvement of the present invention, the battery core is not provided with an easy-to-tear sticker.

[0018] As a further improvement of the utility model, it also includes a first pole tab and a second pole tab;

[0019] The orthographic projection of the first electrode tab or the second electrode tab on the surface of the battery cell overlaps with the orthographic projection of the handle on the surface of the battery cell.

[0020] As a further improvement of the present invention, the length of the secondary fold of the second double fold is greater than the length of the primary fold.

[0021] As a further improvement of the present invention, the battery further includes a second insulating tape.

[0022] The second insulating tape is wrapped around the bottom edge of the battery core;

[0023] The first insulating tape is connected to or overlapped with the second insulating tape at its corresponding position; and there is a gap between the handle and the second insulating tape at its corresponding position.

[0024] On the other hand, the present invention provides an electronic device, which includes the battery as described above, and the battery is used to power the electronic device.

[0025] The beneficial effects of the present invention are as follows: first, an outer double fold is provided on the thinner side of the stepped battery cell, which can avoid the problem that the thickness of the fold is greater than the thickness of the battery cell when a single fold is performed, resulting in a reduction in the battery energy density. At the same time, it can also avoid the problem that folding is difficult when an inner double fold is performed; second, wrapping the outer side of the outer double fold with insulating tape can avoid the risk of short circuit caused by contact between the exposed metal layer and the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0027] Figure 1 This is a front view of a battery according to an embodiment of the present utility model.

[0028] Figure 2 This is a rear view of a battery according to an embodiment of the present utility model.

[0029] Figure 3 This is a bottom view of a battery cell in a battery according to an embodiment of the present utility model.

[0030] Figure 4 for Figure 3 Enlarged view of point A.

[0031] Figure 5 for Figure 3 Enlarged view of point B.

[0032] Figure 6 This is a front view of the handle and the battery cell after bonding in the embodiment of the utility model.

[0033] Figure 7 This is a rear view of the embodiment of the present invention after the handle is bonded to the battery cell.

[0034] Figure 8 Schematic diagram of the regional distribution of adhesive on the handle in an embodiment of the present invention.

[0035] Figure 9 This is a front view of the first insulating tape bonded to the battery cell in an embodiment of the present invention.

[0036] Figure 10 This is a rear view of the embodiment of the present invention after the first insulating tape is bonded to the battery cell.

[0037] Figure 11 This is a perspective view of the handle and the battery core after bonding in an embodiment of the present invention.

[0038] In the figure,

[0039] 10. Battery cells;

[0040] 11. First double fold; 111. First primary fold; 112. First secondary fold; 12. Second double fold; 121. Second primary fold; 122. Second secondary fold; 13. First tab; 14. Second tab;

[0041] 20. Handle;

[0042] 21. First notch; 22. Second notch; 23. Strong glue area; 24. Glue dot area; 25. No glue area;

[0043] 30. First insulating tape;

[0044] 40. Second insulating tape. DETAILED DESCRIPTION

[0045] In the related art, the left and right sides of the battery cell often adopt the same folding structure. For example, both the left and right sides of the battery cell adopt a single folding structure facing the battery cell; or, in order to improve the insulation effect, both the left and right sides of the battery cell adopt an inner double folding structure facing the battery cell. Among them, the single folding structure refers to a structure formed by bending the left and right sides of the battery cell once toward the direction of the battery cell, and the folded edge formed is parallel to the thickness direction of the battery cell. The inner double folding structure refers to a structure formed by bending the left and right sides of the battery cell twice toward the direction of the battery cell, forming a primary folding edge when the first bend is performed, and forming a secondary folding edge when the second bend is performed. The primary and secondary folding edges formed are both parallel to the thickness direction of the battery cell, and the secondary folding edge is located between the battery cell and the primary folding edge.

[0046] However, when using a single-fold structure, the thickness of the fold on the thinner side of the stepped cell will be greater than the thickness of the cell, increasing the overall thickness of the battery and ultimately reducing the battery's energy density. When using an inner double-fold structure, the folding of the thinner side of the stepped cell will be difficult.

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0049] In addition, in the description of the present invention, the terms used are for illustrative purposes only and are not intended to limit the scope of the present invention. The terms "include" and / or "comprise" are used to specify the presence of the elements, steps, operations and / or components, but do not exclude the presence or addition of one or more other elements, steps, operations and / or components. The terms "first", "second" and the like may be used to describe various elements, do not represent an order, and do not limit these elements. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more. These terms are only used to distinguish one element from another. These and / or other aspects become apparent in conjunction with the following drawings, and it is easier for a person of ordinary skill in the art to understand the description of the embodiments of the present invention. The drawings are used to depict the embodiments of the present invention for illustrative purposes only. Those skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods shown in the present invention can be adopted without departing from the principles of the present invention.

[0050] For ease of understanding, in the following figures, the X-axis direction is the width direction of the battery, the Y-axis direction is the length direction of the battery, and the Z-axis direction is the thickness direction of the battery.

[0051] See also Figure 1-3 A battery according to an embodiment of the present invention includes a battery cell 10, a handle 20 and a first insulating tape 30, wherein the handle 20 and the first insulating tape 30 are respectively wrapped on the thicker side and the thinner side of the battery cell 10.

[0052] Specifically, such as Figure 3-5 As shown, the battery cell 10 is a stepped cell. It's easy to understand that a stepped cell refers to a cell with varying thicknesses. For example, the cell 10 is a stepped cell with a thinner left half and a thicker right half. A first double fold 11 is provided on the side of the right half of the cell 10, and a second double fold 12 is provided on the side of the left half of the cell 10. A handle 20 is wrapped around the outside of the first double fold 11, and a first insulating tape 30 is wrapped around the outside of the second double fold 12.

[0053] Among them, the first double fold 11 is an inner double fold, that is, the right side of the battery cell 10 is bent toward the battery cell 10 for the first time to form a first primary fold 111, and is bent a second time to form a first secondary fold 112. The first primary fold 111 and the first secondary fold 112 are both parallel to the thickness direction of the battery cell 10, and the first secondary fold 112 is located between the battery cell 10 and the first primary fold 111. The second double fold 12 is an outer double fold, which refers to a structure in which the side of the battery cell 10 is bent toward the battery cell 10 for the first time, and then bent a second time away from the battery cell 10. That is, the second double fold 12 is bent toward the battery cell 10 for the first time to form a second primary fold 121, and then bent a second time away from the battery cell 10 to form a second secondary fold 122. The second primary fold 121 and the second secondary fold 122 are both parallel to the thickness direction of the battery cell 10 , and the second primary fold 121 is located between the battery cell 10 and the second secondary fold 122 , and the second secondary fold 122 is located on the side away from the battery cell 10 .

[0054] It is understandable that, compared to a battery with both sides having inner double folds, the battery of this embodiment uses an outer double fold when folding the thinner side, making secondary folding more convenient. Furthermore, compared to a battery with both sides having single folds, using an outer double fold at the junction can effectively reduce the size of the fold in the battery thickness direction, thereby reducing the overall thickness of the battery without reducing the battery energy density.

[0055] See also Figure 6 and Figure 7 The handle 20 is configured as a strip groove with openings at both ends, and the raised edges on both sides of the strip groove are respectively adhered to the front and back of the battery cell 10, thereby wrapping the first double folded edge 11 inside. The front of the battery cell 10 refers to the surface with a gradient, and the back of the battery cell 10 refers to the surface without a gradient. The length of the strip groove is adapted to the length of the battery cell 10. For example, the length of the strip groove is slightly smaller than the length of the battery cell 10, so that the handle 20 can wrap the first double folded edge 11 as completely as possible to ensure that the first double folded edge 11 does not contact the electronic device and cause a short circuit. In addition, the handle 20 can also facilitate lifting or pulling the battery out of the electronic device.

[0056] See also Figure 9 and Figure 10The first insulating tape 30 is configured as a strip-shaped groove with open ends. The raised edges of the strip-shaped groove are respectively bonded to the front and back of the battery cell 10, thereby enclosing the second double fold 12. The length of the strip-shaped groove is adapted to the length of the battery cell 10. For example, the length of the strip-shaped groove is slightly smaller than the length of the battery cell 10, so that the first insulating tape 30 can fully enclose the second double fold 12 as much as possible, ensuring that the second double fold 12 does not come into contact with electronic equipment and cause a short circuit.

[0057] The handle 20 is typically made of polyethylene terephthalate (PET) with a thickness of 0.04 ± 0.005 mm. The first insulating tape 30 is typically made of polyimide (PI) with a thickness of 0.05 ± 0.01 mm. The handle 20 is thicker than the first insulating tape 30. Wrapping the handle 20 around the outside of the first double fold 11 minimizes the overall thickness of the battery. This allows the thickness of the battery cell 10 to be maximized within a limited electronic device installation space, thereby increasing the battery's energy density.

[0058] Further, such as Figure 6-8 As shown, the portion of the handle 20 located on the front of the battery cell 10 is provided with a first notch 21, and the portion of the handle 20 located on the back of the battery cell 10 is provided with a second notch 22. The first notch 21 can reserve more space for one end of the electronic device to avoid protrusions and other components provided on the electronic device at corresponding positions. In addition to forming an escape space for the electronic device, the second notch 22 can also facilitate the removal of the battery. For example, a tool can be inserted into the second notch 22 to lift or pull the battery out of the electronic device. In application, the number and location of the notches can be adaptively adjusted according to the structural design of the electronic device to facilitate the installation of the electronic device, and this application does not impose specific limitations on this.

[0059] Continue to see Figure 6-8 The bonding surface between the handle 20 and the battery cell 10 includes a strong glue area 23, a glue-dot area 24 and a glue-free area 25 arranged in sequence, wherein the strong glue area 23 is located on the back of the battery cell 10; the glue-dot area 24 and the glue-free area 25 are located on the front of the battery cell 10.

[0060] Specifically, the strong glue area 23 is, for example, arranged on the edge where the handle 20 is bonded to the front of the battery cell 10, and the glue-dispensing area 24 and the glue-free area 25 are arranged on other areas of the handle 20. It can be understood that the strong glue area 23 is an area where the adhesive is evenly applied to enhance the firmness of the bond between the handle 20 and the battery cell 10. The glue-dispensing area 24 is an area where the adhesive is applied by glue-dispensing to form evenly distributed glue dots, and the diameter of each glue dot is, for example, 1.4±0.0 mm. The size of each glue dot can also be appropriately increased or decreased according to the size of the handle 20, and this application does not make specific restrictions thereon. The glue-free area 25 is arranged near the edge of the portion of the handle 20 located on the back of the battery cell 10, so that the edge of the portion of the handle 20 located on the back of the battery cell 10 will not be bonded to the battery cell 10.

[0061] Furthermore, the sum of the widths of the adhesive-dotting area 24 and the adhesive-free area 25 is greater than the width of the strong adhesive area 23. For example, the width of the strong adhesive area 23 is 6-7 mm, and the sum of the widths of the adhesive-dotting area 24 and the adhesive-free area 25 is 11.5-12 mm. During use, the widths of the strong adhesive area 23, the adhesive-dotting area 24, and the adhesive-free area 25 can be adjusted according to the size of the battery cell 10 and the handle 20, and this application does not specifically limit them. It is understandable that the viscosity at the corresponding positions decreases in sequence from the strong adhesive area 23, the adhesive-dotting area 24 to the adhesive-free area 25. When the handle 20 needs to be torn off the battery cell 10, the handle 20 can be torn off by pinching the non-glue area 25, then tearing off the weaker glue area 24, and then tearing off the strongest glue area 23. The strong glue area 23 is narrow, while the glue area 24 and the non-glue area 25 are wide, making it easier to tear the handle 20 off the battery cell 10. This not only ensures the adhesion between the handle 20 and the battery cell 10, but also makes it easier to tear the handle 20 off the battery cell 10.

[0062] Furthermore, the battery cell 10 is not provided with an easy-to-tear sticker.

[0063] In this application, no easy-tear tape is wrapped around the outside of the battery cell 10. For example, double-sided tape could be used to secure the battery to the battery compartment of an electronic device. This avoids any overlap between the easy-tear tape and the handle 20 or the first insulating tape 30, which would increase the overall thickness of the battery. This eliminates the use of an easy-tear tape, reducing the space occupied by the battery in the thickness direction, thereby increasing the battery's thickness and improving its energy density.

[0064] In an optional embodiment, the battery further includes a first pole tab 13 and a second pole tab 14 ; the orthographic projection of the first pole tab 13 or the second pole tab 14 on the surface of the battery cell 10 overlaps with the orthographic projection of the handle 20 on the surface of the battery cell 10 .

[0065] Specifically, such as Figure 11As shown, the first tab 13 is, for example, the negative tab of the battery, and the second tab 14 is, for example, the positive tab of the battery. The handle 20 is wrapped around the side near the negative tab, and the portion of the handle 20 bonded to the front of the battery cell 10 is, for example, the first edge, and the portion of the handle 20 bonded to the back of the battery cell 10 is, for example, the second edge. The orthographic projection of the first edge and / or the second edge on the front and / or back of the battery cell 10 overlaps with the orthographic projection of the negative tab on the front and / or back of the battery cell 10, which can ensure that the first edge and / or the second edge is wrapped around the aluminum-plastic film at the position corresponding to the negative tab, thereby preventing the aluminum-plastic film from being scratched by the outside world, and thus ensuring the stability of the negative tab. In use, since the sizes and relative pasting positions of the handle 20 and the battery cell 10 are different, at least the following situations are included:

[0066] For example, only the orthographic projection of the first edge on the front face of the battery cell 10 overlaps with the orthographic projection of the negative electrode tab on the front face of the battery cell 10, so that only the first edge covers the aluminum-plastic film at the position corresponding to the negative electrode tab; or, only the orthographic projection of the second edge on the back face of the battery cell 10 overlaps with the orthographic projection of the negative electrode tab on the back face of the battery cell 10, so that only the second edge covers the aluminum-plastic film at the position corresponding to the negative electrode tab; or, the orthographic projection of the first edge on the front face of the battery cell 10 overlaps with the orthographic projection of the negative electrode tab on the front face of the battery cell 10, and the orthographic projection of the second edge on the back face of the battery cell 10 overlaps with the orthographic projection of the negative electrode tab on the back face of the battery cell 10, so that both the first edge and the second edge can cover the aluminum-plastic film at the position corresponding to the negative electrode tab. The above possible situations are all within the scope of protection of the present utility model.

[0067] In an alternative embodiment, see Figure 3 and Figure 5 , the length of the secondary fold of the second double fold 12 is greater than the length of its primary fold. Specifically, the second double fold 12 includes a second primary fold 121 and a second secondary fold 122, and the second secondary fold 122 is located on the outside of the second primary fold 121. When the first insulating tape 30 is wrapped around the outside of the second fold 12, the first insulating tape 30 will be bonded to the second secondary fold 122. Since the second fold 12 is arranged on the side of the thinner left half of the stepped battery cell 10, the length L2 of the second secondary fold 122 is greater than the length L1 of the second primary fold 121, which can ensure that the first insulating tape 30 and the second fold 12 have a larger bonding area, ensure the bonding effect between the first insulating tape 30 and the battery cell 10, and thus avoid the first insulating tape 30 from warping.

[0068] Preferably, Figure 1 and Figure 2As shown, the second insulating tape 40 is wrapped around the bottom edge of the battery cell 10 to prevent the bottom edge of the battery cell 10 from short-circuiting due to contact with the outside world, thereby achieving an insulating effect. The first insulating tape 30 is wrapped around the side edge of the thinner left half of the battery cell 10, and the handle 20 is wrapped around the side edge of the thicker right half of the battery cell 10. The end of the first insulating tape 30 close to the second insulating tape 40 (i.e., the lower end of the first insulating tape 30) is connected to or overlapped with the second insulating tape 40. On the one hand, it can ensure the sealing of the first insulating tape 30 and the second insulating tape 40 on the battery cell 10, thereby improving the insulation effect of the battery cell 10; on the other hand, it can also improve the problem of weak mechanical properties (such as stiffness and strength) of the thinner part of the battery cell 10, thereby better protecting the battery cell 10 and preventing damage to the battery cell 10. There is a gap between the end of the handle 20 close to the second insulating paper 40 (i.e., the lower end of the handle 20) and the second insulating paper 40, that is, the handle 20 and the second insulating paper 40 do not overlap, and will not increase the overall thickness of the battery, thereby avoiding increasing the space occupied in the electronic device.

[0069] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0070] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features that are included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0071] It will be understood by those skilled in the art that although the present invention has been described with reference to exemplary embodiments, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present invention without departing from the essential scope of the present invention. Therefore, the present invention is not limited to the particular embodiments disclosed, but is intended to include all embodiments falling within the scope of the appended claims.

Claims

1. A battery, characterized in that: The battery comprises: A battery cell, wherein the battery cell is a stepped battery cell; The side edge of the thicker side of the battery core is provided with a first double folded edge, and the side edge of the thinner side of the battery core is provided with a second double folded edge; The secondary fold of the first double fold is located between the battery core and the primary fold of the first double fold; The first fold of the second double fold is located between the battery core and the second fold of the second double fold; A first insulating tape is wrapped around the outer side of the second double folded edge.

2. The battery according to claim 1, wherein Also includes: A handle is wrapped around the outer side of the first double folded edge.

3. The battery according to claim 2, wherein The portion of the handle located on the surface of the battery core is provided with a plurality of notches.

4. The battery according to claim 2, wherein The bonding surface between the handle and the battery cell includes a strong glue area, a glue spot area and a glue-free area arranged in sequence; The strong glue area is located on the front side of the battery cell; The glue-dispensing area and the glue-free area are located on the back side of the battery core.

5. The battery according to claim 4, wherein The sum of the widths of the glue-dotting area and the glue-free area is greater than the width of the strong glue area.

6. The battery according to claim 5, wherein The battery cell is not provided with an easy-to-tear sticker.

7. The battery according to claim 2, wherein Also included is a first tab and a second tab; The orthographic projection of the first electrode tab or the second electrode tab on the surface of the battery cell overlaps with the orthographic projection of the handle on the surface of the battery cell.

8. The battery according to claim 1, wherein The length of the second double fold is greater than the length of the first fold.

9. The battery according to claim 2, wherein Also includes a second insulating tape, The second insulating tape is wrapped around the bottom edge of the battery core; The first insulating tape is connected to or overlapped with the second insulating tape at its corresponding position; and there is a gap between the handle and the second insulating tape at its corresponding position.

10. An electronic device, characterized in that: The device comprises the battery according to any one of claims 1 to 9, wherein the battery is used to power the electronic device.

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