Battery

Abstract

The utility model provides a battery. The battery comprises a first battery cell and a second battery cell, both the first battery cell and the second battery cell are provided with tabs; the wrapping part is provided with a first folding part and a second folding part, the first folding part and the second folding part are arranged in a foldable mode, the first folding part and the second folding part are each provided with a groove, the first battery cell is located in the groove of the first folding part, the second battery cell is located in the groove of the second folding part, and when the first folding part and the second folding part are folded, the first folding part and the second folding part are folded. The first battery cell and the second battery cell in the grooves are overlapped, and the tabs of the first battery cell and the second battery cell are positioned on the same side of the grooves and can be connected together. According to the battery circuit board, the problem that devices and circuits on the battery circuit board in the prior art are difficult to arrange is solved.

Description

Technical Field

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

[0002] Currently, multi-cell battery series connections typically involve connecting each cell's tab to a battery protection board via nickel sheets, leveraging the board's wiring structure to achieve the connection. Because high currents flow through the protection board, the space available for the board is limited. For example, in a two-cell series connection, the four tabs occupy a significant portion of the device space, making component and circuit layout difficult. This can also lead to heat concentration on the protection board, potentially causing battery circuit failure. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery to solve the problem of difficulty in layout of devices and circuits on a battery circuit board in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a battery is provided, comprising: a first battery cell; a second battery cell, the first battery cell and the second battery cell both having tabs; a covering, the covering having a first folding portion and a second folding portion, the first folding portion and the second folding portion being foldably arranged between each other, the first folding portion and the second folding portion both having a groove, the first battery cell being located in the groove of the first folding portion, the second battery cell being located in the groove of the second folding portion, when the first folding portion and the second folding portion are folded, the grooves butt against each other, the first battery cell and the second battery cell in the grooves are stacked, and the tabs of the first battery cell and the second battery cell are located on the same side of the grooves and can be connected together.

[0005] Furthermore, the first folding portion and the second folding portion are integrally formed.

[0006] Furthermore, the first folding portion and the second folding portion each have a circumferentially adjacent long side and short side, the short sides of the first folding portion and the second folding portion are connected to each other and can be folded, and the tab is located on the side opposite to the short side.

[0007] Furthermore, the covering piece has an avoidance recess, which is communicated with the groove and with the outer side of the covering piece.

[0008] Furthermore, the battery further includes a cell insulation layer, which is arranged between the stacked first cell and the second cell.

[0009] Furthermore, the tabs include a positive tab and a negative tab. When the first folding portion and the second folding portion are folded, the positive tab of the first battery cell and the negative tab of the second battery cell are overlapped and connected, and the negative tab of the first battery cell and the positive tab of the second battery cell are overlapped and separated.

[0010] Furthermore, the battery further includes a tab insulation layer, wherein the tab insulation layer is provided between two stacked and separated tabs.

[0011] Furthermore, the battery further includes a cell insulation layer, which is disposed between the stacked first cell and the second cell, and the cell insulation layer and the tab insulation layer are integrally formed.

[0012] Furthermore, the first folding portion and the second folding portion also have flanges, which are located at the edges of the groove. When the first folding portion and the second folding portion are folded, the flanges of the first folding portion and the flanges of the second folding portion are butted and pressed together.

[0013] Furthermore, the covering piece is an aluminum-plastic film piece.

[0014] By applying the technical solution of the present invention, a first folding portion and a second folding portion with grooves are provided, and the first battery cell and the second battery cell are provided in the grooves, so that the tabs of the two battery cells are stacked. On the one hand, the stacking of the tabs reduces the space occupied by the tabs, simplifies the wiring of the tabs, and helps to avoid heat concentration caused by multiple wirings, thereby avoiding damage to the battery. On the other hand, by wrapping the battery cells, the two battery cells are wrapped into a whole, making the structure of the battery more compact and the battery as a whole more reliable and stable. Moreover, the foldable design makes the packaging of the battery cells and tabs more convenient and simple. All of the above aspects reduce the space occupied by the battery, simplify the process, and are beneficial to the layout of devices and circuits on the circuit board, thereby facilitating design and improving the battery's ability to charge quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 An exploded view of a battery of the present invention is shown;

[0017] Figure 2 It shows a schematic structural diagram of the battery when the first folding part and the second folding part are unfolded;

[0018] Figure 3 It shows a schematic structural diagram of the battery after the first folding part and the second folding part are folded;

[0019] Figure 4 Shown Figure 3 Exploded diagram.

[0020] The above drawings include the following reference numerals:

[0021] 10. First battery cell; 11. Tab; 20. Covering; 21. First folding portion; 211. Groove; 212. Avoidance recess; 213. Flanged edge; 22. Second folding portion; 23. Folding line; 30. Battery cell insulation layer; 40. Tab insulation layer; 50. Second battery cell. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0024] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0025] In order to solve the problem in the prior art that the battery tabs of mobile phones occupy a large space, which leads to difficulty in battery layout, the utility model provides a battery.

[0026] like Figures 1 to 4 A battery shown includes a first battery cell 10, a second battery cell 50 and a covering 20, wherein the first battery cell 10 and the second battery cell 50 both have a tab 11; the covering 20 has a first folding portion 21 and a second folding portion 22, which can be folded between the first folding portion 21 and the second folding portion 22, and the first folding portion 21 and the second folding portion 22 both have a groove 211, the first battery cell 10 is located in the groove 211 of the first folding portion 21, and the second battery cell 50 is located in the groove 211 of the second folding portion 22, when the first folding portion 21 and the second folding portion 22 are folded, the grooves 211 are butted against each other, the first battery cell 10 and the second battery cell 50 are stacked in the groove 211, and the tabs 11 of the first battery cell 10 and the second battery cell 50 are located on the same side of the groove 211 and can be connected together.

[0027] In this embodiment, a first folding portion 21 and a second folding portion 22 having a groove 211 are provided, and the first battery cell 10 and the second battery cell 50 are provided in the groove 211, so that the tabs 11 of the two battery cells are overlapped. On the one hand, the overlapping of the tabs 11 reduces the space occupied by the tabs 11 and simplifies the wiring of the tabs 11, while helping to avoid heat concentration caused by multiple wirings and damage to the battery. On the other hand, by wrapping the battery cells, the two battery cells are wrapped into a whole, making the battery structure more compact and the battery as a whole more reliable and stable. Moreover, the foldable design makes the packaging of the battery cells and the tabs 11 more convenient and simple. All of the above aspects reduce the space occupied by the battery, simplify the process, and are beneficial to the layout of devices and circuits on the circuit board, thereby facilitating design and improving the battery's ability to charge quickly.

[0028] In this embodiment, the first folding portion 21 and the second folding portion 22 are integrally formed, which simplifies the structure of the covering 20, thereby making the structure of the covering 20 simpler and more reliable, and making the structure of the battery more compact. At the same time, it avoids the connectors of the covering 20 and the like occupying the battery space, reduces the space waste of the covering 20, and enables the same space to have a larger battery cell capacity, thereby improving the battery capacity.

[0029] It should be noted that if Figure 3 As shown, in this embodiment, the battery is generally rectangular in shape, and correspondingly, the two battery cells are also rectangular in shape. The recesses 211 within the first folded portion 21 and the second folded portion 22 are also rectangular in shape for accommodating the battery cells. The first folded portion 21 and the second folded portion 22 match the shape of the recess 211. Based on the above-described structural form, the first folded portion 21 and the second folded portion 22 of this embodiment each have circumferentially adjacent long sides and short sides. The long sides and short sides are essentially the sides where the long sides and short sides of the rectangular cross-section are located. The short sides of the first folded portion 21 and the second folded portion 22 are interconnected and foldable. In this way, when the first folded portion 21 and the second folded portion 22 are folded, they fold along the interconnected short sides, thereby achieving stacking of the two battery cells. Since the short sides are folded, the tabs 11 are arranged on the side opposite to the short sides, so that the tabs 11 are not affected during folding, and after folding, the tabs 11 are ensured to be on the same side and connected to each other.

[0030] In this embodiment, if Figure 1 、 2 As shown, when the first folding portion 21 and the second folding portion 22 are not folded, the surfaces on the same side of the first folding portion 21 and the second folding portion 22 are recessed in the same direction to form grooves 211, that is, Figure 1 and 2In both cases, two grooves 211 are formed by depressions on the upper surfaces of the first folding portion 21 and the second folding portion 22. The short side is between the first folding portion 21 and the second folding portion 22, and the short side has a folding line 23. The first folding portion 21 and the second folding portion 22 are folded upwards based on the folding line 23. The openings of the two grooves 211 are opposite to each other, and the circumferential edges of the first folding portion 21 and the second folding portion 22 are sealed and connected to form a closed space for accommodating two battery cells. Of course, the specific folding form of the above-mentioned first folding portion 21 and the second folding portion 22, the position of the overlap between the two, etc. can be adjusted as needed. For example, the long sides of the first folding portion 21 and the second folding portion 22 can be connected to each other, and the folding line 23 can be located at the long side.

[0031] In this embodiment, the covering 20 has an avoidance recess 212, which is connected to the groove 211 and to the outside of the covering 20, and the avoidance recess 212 corresponds to the setting position of the pole ear 11 of the battery cell. The avoidance recess 212 is set at the side of the first folding portion 21 and the second folding portion 22 away from the folding line 23, so that the pole ear 11 can extend from the groove 211 through the avoidance recess 212 and connect with external components.

[0032] In this embodiment, the battery further includes a cell insulation layer 30, which is disposed between the stacked first cell 10 and the second cell 50 to insulate the first cell 10 from the second cell 50. Preferably, the shape of the cell insulation layer 30 needs to match the shape of the surface stacked between the first cell 10 and the second cell 50. In this embodiment, the surface stacked between the first cell 10 and the second cell 50 is a rectangular surface, so the cell insulation layer 30 is also configured as a rectangular insulating surface to ensure insulation between the cells. Of course, the cell insulation layer 30 can also be configured as other shapes as long as insulation is ensured between the stacked surfaces of the cells.

[0033] In this embodiment, the tab 11 includes a positive tab and a negative tab. When the first folding portion 21 and the second folding portion 22 are folded, in the adjacent stacked first battery cell 10 and the second battery cell 50, the positive tab of the first battery cell 10 and the negative tab of the second battery cell 50 are stacked and connected as the first tab, and the negative tab of the first battery cell 10 and the positive tab of the second battery cell 50 are stacked and separated as the second tab. In this way, the first battery cell 10 and the second battery cell 50 are connected in series through the first tab, thereby utilizing the single-sided tab to realize the function of the double-sided tab, so that the positive tab and the negative tab of the second tab can serve as the positive and negative poles of the battery, thereby realizing stacked battery cells and stacked battery cells. For example, in an optional embodiment, the positive and negative pole ears of the first pole ear are connected and fixed by laser welding, the first pole ear is connected to the external protection board as a voltage detection, and the positive and negative pole ears of the second pole ear are respectively connected to the protection board. Compared with the traditional solution of using dual-cell with four separately set pole ears 11, the external protection board needs to be connected to the four pole ears 11 respectively. It has the disadvantages of occupying a large area of the protection board when connected to the protection board, and needs to be connected through the protection board, the protection board flows through the current, and increases the heat generation of the protection board. The connection method of this embodiment enables the battery to be connected to the protection board. It can reduce the area occupied by the pole ear 11 by half, improve heat dissipation and flow, and at the same time make the battery structure compact, increase the battery energy ratio, and reduce the difficulty of battery circuit board design. Of course, the specific connection method between the above-mentioned pole ears 11 can also be adjusted as needed. When the battery cells need to be connected in parallel, the two positive pole ears and the two negative pole ears can be connected together respectively. At the same time, when the number of battery cells increases, multiple battery cells can also be arranged in the groove 211 at the same time. At this time, the positive pole ear of one battery cell is connected to the negative pole ear of another battery cell between two adjacent battery cells, and the remaining pole ear can be matched with another adjacent battery cell or left vacant for external connection.

[0034] In this embodiment, the battery further includes a tab insulation layer 40. The tab insulation layer 40 is provided between the two tabs 11 stacked and separated, i.e., the aforementioned second tab. In other words, the positive tab and the negative tab of the second tab are insulated from each other by the tab insulation layer 40 to avoid short circuits within the battery cell. Specifically, the tab insulation layer 40 can be stacked between the positive tab and the negative tab as the second tab, or can be provided as shown in FIG. Figure 1 As shown, it is arranged on the positive or negative tab, thereby isolating the positive and negative tabs and providing insulation. Optionally, the tab insulation layer 40 of this embodiment uses insulating tape, which is pasted on the positive or negative tab to ensure that the positive and negative tabs are isolated by the insulating tape.

[0035] Since both the tab insulation layer 40 and the cell insulation layer 30 serve as insulation and separation, the tab insulation layer 40 and the cell insulation layer 30 can be set separately, that is, the tab insulation layer 40 and the cell insulation layer 30 are set separately, and the two are independent of each other and do not affect each other, or the tab insulation layer 40 and the cell insulation layer 30 can be set as an integral part, so that the two form a large insulation layer, which can separate the cell and separate the second tab.

[0036] In this embodiment, the first folding portion 21 and the second folding portion 22 also have a flange 213, which is located at the edges of the groove 211. When the first folding portion 21 and the second folding portion 22 are folded, the flange 213 of the first folding portion 21 and the flange 213 of the second folding portion 22 are docked and pressed together, thereby fixing the first folding portion 21 and the second folding portion 22, ensuring the safety and stability of the battery cell inside the groove 211, and at the same time ensuring the sealing of the battery to prevent battery damage from affecting other components.

[0037] In this embodiment, the covering 20 is an aluminum-plastic film, which has good stamping properties, so that the covering 20 can be better formed to match the shape of the battery cell and the external space. At the same time, the aluminum-plastic film has good insulation and barrier properties, and is used for covering the battery cell, which greatly improves the safety and reliability of the battery. When the battery cell is damaged, the covering 20 can prevent it from damaging other components around the battery.

[0038] The process flow of battery production in this embodiment is as follows:

[0039] 1. Double-grooving the covering member 20 to form two grooves 211;

[0040] 2. Place the first battery cell 10 and the second battery cell 50 in the two grooves 211 respectively;

[0041] 3. The covering member 20 is pre-laminated on the second battery cell 50 , and the second battery cell 50 is sealed with the battery cell insulation layer 30 , and isolated and insulated from the first battery cell 10 ;

[0042] 4. The first battery cell 10 is rotated 180 degrees. Figure 2 As shown, the flanges 213 of the first folding portion 21 and the second folding portion 22 are pressed together to form a battery sealing edge;

[0043] 5. The first battery cell 10 and the second battery cell 50 are injected with liquid, and the first tab, that is, the positive tab of the first battery cell 10 and the negative tab of the second battery cell 50 are cut, welded and pressed together;

[0044] 6. Use the tab insulation layer 40 to insulate the second tab, that is, to insulate the negative tab of the first battery cell 10 from the positive tab of the second battery cell 50, so that the positive tab and the negative tab of the second tab are insulated;

[0045] 7. Battery formation, battery folding to form stacked battery;

[0046] 8. Lead out the second tab, which is the negative tab of the first battery cell 10 and the positive tab of the second battery cell 50, and weld them to the battery protection plate;

[0047] 9. Wrap the second lead-out tab with adhesive tape for insulation.

[0048] It should be noted that, in the above embodiments, a plurality refers to at least two.

[0049] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0050] 1. It solves the problem in the prior art that the battery tabs of mobile phones occupy a large space, which makes battery layout difficult;

[0051] 2. The stacking of tabs reduces the space occupied by the tabs, simplifies the wiring of the tabs, and helps to avoid heat concentration caused by multiple wiring and damage to the battery;

[0052] 3. Wrapping the two battery cells into a whole makes the battery structure more compact and the battery as a whole more reliable and stable;

[0053] 4. It reduces the space occupied by the battery, simplifies the process, and is conducive to the layout of devices and circuits on the circuit board in a small space, thereby facilitating design and improving the battery's ability to charge quickly.

[0054] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0056] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery, characterized in that: include: a first battery cell (10); A second battery cell (50), wherein both the first battery cell (10) and the second battery cell (50) have a tab (11); A covering member (20), the covering member (20) having a first folding portion (21) and a second folding portion (22), the first folding portion (21) and the second folding portion (22) being foldable, the first folding portion (21) and the second folding portion (22) both having a groove (211), the first battery cell (10) being located in the groove (211) of the first folding portion (21), the second battery cell (50) being located in the groove (211) of the second folding portion (22), when the first folding portion (21) and the second folding portion (22) are folded, the grooves (211) being butted against each other, the first battery cell (10) and the second battery cell (50) being stacked in the groove (211), and the tabs (11) of the first battery cell (10) and the second battery cell (50) being located on the same side of the groove (211) and being capable of being connected together.

2. The battery according to claim 1, characterized in that The first folding portion (21) and the second folding portion (22) are integrally formed.

3. The battery according to claim 1, characterized in that The first folding portion (21) and the second folding portion (22) both have circumferentially adjacent long sides and short sides, the short sides of the first folding portion (21) and the second folding portion (22) are interconnected and foldable, and the tab (11) is located on a side opposite to the short side.

4. The battery according to claim 1, characterized in that The covering piece (20) has an avoidance recess (212), and the avoidance recess (212) is communicated with the groove (211) and is also communicated with the outside of the covering piece (20).

5. The battery according to claim 1, characterized in that The battery further comprises a cell insulation layer (30), wherein the cell insulation layer (30) is arranged between the stacked first cell (10) and the second cell (50).

6. The battery according to claim 1, characterized in that The electrode tab (11) includes a positive electrode tab and a negative electrode tab. When the first folding portion (21) and the second folding portion (22) are folded, the positive electrode tab of the first battery cell (10) and the negative electrode tab of the second battery cell (50) are overlapped and connected, and the negative electrode tab of the first battery cell (10) and the positive electrode tab of the second battery cell (50) are overlapped and separated.

7. The battery according to claim 6, characterized in that The battery further comprises a tab insulation layer (40), wherein the tab insulation layer (40) is arranged between two tabs (11) that are stacked and spaced apart.

8. The battery according to claim 7, characterized in that The battery further comprises a cell insulation layer (30), wherein the cell insulation layer (30) is arranged between the stacked first cell (10) and the second cell (50), and the cell insulation layer (30) and the tab insulation layer (40) are integrally formed.

9. The battery according to claim 1, characterized in that The first folding portion (21) and the second folding portion (22) further have flanges (213), and the flanges (213) are located at the edges of the groove (211). When the first folding portion (21) and the second folding portion (22) are folded, the flanges (213) of the first folding portion (21) and the flanges (213) of the second folding portion (22) are butted and pressed together.

10. The battery according to claim 1, characterized in that The covering part (20) is an aluminum-plastic film part.

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