Turnover tab folding flexible battery pack and electric device

Abstract

The utility model discloses a turnover tab folding flexible battery pack and an electric device, and relates to the technical field of flexible batteries, the battery pack comprises a flexible substrate and at least two single batteries linearly arranged on the flexible substrate; the flexible substrate is provided with a cutting line, and a folding part is formed in the cutting line; a folding line is arranged between at least one group of two adjacent single batteries; the at least one single battery is provided with at least one first target tab positioned on the folding part; and after the flexible substrate is folded along the folding line, the first target tab is in contact with the tab of the other single battery along with the folding of the folding part. According to the scheme, the cutting lines are arranged on the flexible substrate, so that the tabs of the single batteries are turned over, then the folding operation of the flexible substrate is matched with the folding operation of the tabs, so that the series connection or parallel connection of the two single batteries can be realized, and the short circuit risk caused by mistaken contact of the tabs is reduced by utilizing the flexible folding of the tabs; and the two single batteries can be independently used after being disconnected subsequently.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible batteries, in particular to a foldable tab-foldable flexible battery pack and an electrical device. Background Art

[0002] With the development of the Internet of Things and flexible electronics, flexible batteries are gaining increasing attention due to their simple production process and flexible application scenarios. Compared to traditional power batteries, flexible batteries are lighter and more flexible, allowing for more electrode design space.

[0003] The open-circuit voltage, battery capacity, and other battery parameters of a single flexible battery are relatively small. In practical applications, multiple flexible batteries are often connected in series or parallel to form a flexible battery pack to achieve a higher open-circuit voltage and larger battery capacity. However, if the traditional battery pack manufacturing method is used to connect multiple flexible batteries in series and parallel multiple times, the production process of the flexible battery pack will be more complicated, with higher process requirements and costs. If the stacked battery pack manufacturing method is used to connect multiple flexible batteries in series and parallel, each flexible battery cannot be used individually, which greatly limits the scope of application. In addition, when multiple flexible batteries need to be stacked back and forth, it is easy to cause short circuit problems due to accidental contact between the battery tabs. Utility Model Content

[0004] The main purpose of this utility model is to propose a foldable flexible battery pack with foldable tabs, which aims to connect multiple flexible batteries to form a flexible battery pack in a simple, easy-to-operate and low-cost manner, reduce the risk of short circuit, and at the same time not affect the individual use of each flexible battery.

[0005] To achieve the above-mentioned purpose, the present invention proposes a foldable flexible battery pack with foldable tabs, comprising:

[0006] The flexible substrate is provided with a cutting line, and a folding portion is formed within the cutting line;

[0007] At least two single cells are linearly arranged on the flexible substrate; a folding line is provided between at least two adjacent single cells; at least one of the single cells has at least one first target tab, at least part of which is disposed on the folded portion;

[0008] When the flexible substrate is folded along the folding line, the first target tab is used to contact a tab of another single battery as the folding portion is folded.

[0009] In one embodiment, the single battery further has a second target tab, which passes through the front and back surfaces of the flexible substrate; the second target tabs of at least two adjacent single batteries are configured to contact each other after the flexible substrate is folded along the folding line.

[0010] In one embodiment, the folding line divides the flexible substrate into a first base portion and a second base portion; a group of two adjacent single cells are used as a first battery and a second battery, respectively, with the first battery located at the first base portion and the second battery located at the second base portion;

[0011] The cutting line is set at the first base portion, and a connection window is opened at the second base portion; when the flexible substrate is folded along the folding line, the first target tab of the first battery is used to pass through the connection window as the folding portion is folded, and the first target tab of the first battery is used to be connected to the tab of the second battery after passing through the connection window.

[0012] In one embodiment, a conductive bridge layer is provided on the back side of the flexible substrate, and the first target tab is used to connect to a tab of another single battery through the conductive bridge layer.

[0013] In one embodiment, at least one of the single cells has two first target tabs, a cutting line is provided around each of the first target tabs, and a folded portion is formed within each of the cutting lines.

[0014] In one embodiment, at least one of the single cells has two first target tabs, and the two first target tabs are disposed on the folding portion and are configured to be folded simultaneously with the folding portion.

[0015] In one embodiment, the folding line divides the flexible substrate into a first base portion and a second base portion; a group of two adjacent single cells are used as a first battery and a second battery, respectively, with the first battery located at the first base portion and the second battery located at the second base portion;

[0016] At least one tab of the first battery crosses the folding line and extends to the second base portion.

[0017] In one embodiment, at least a portion of the cutting line coincides with a side line of the flexible substrate.

[0018] In one embodiment, the number of the single cells is at least four, and a folding line is provided between each group of two adjacent single cells, and the folding directions corresponding to the two adjacent folding lines are opposite;

[0019] The periphery of each tab of each single battery is provided with the cutting line, and a folding portion is formed within each cutting line.

[0020] In one embodiment, a serration structure is provided on the surface of at least one tab of the single battery.

[0021] In one embodiment, the folding line is configured as a tear line.

[0022] In one embodiment, an adhesive layer is provided on the surface of the flexible substrate.

[0023] The present invention also provides an electrical device, comprising the aforementioned foldable tab foldable flexible battery pack.

[0024] The technical solution of the present invention sets a cutting line on the flexible substrate so that the first target tab of the single battery can be folded. On the one hand, the first target tab can be flexibly adjusted to the front or back side of the flexible substrate through the folding operation, which facilitates the contact between the first target tab and other tabs, thereby conveniently realizing series connection or parallel connection between single batteries in conjunction with the folding operation of the flexible substrate, and connecting multiple single batteries in a low-cost and easy-to-operate manner to form a foldable tab foldable flexible battery pack with higher open-circuit voltage and larger battery capacity; on the other hand, the two tabs that should not be in contact can be adjusted to positions deviated from each other through the folding operation, thereby reducing the probability of accidental contact between the two tabs after the flexible substrate is folded, and reducing the risk of short circuit caused by accidental contact between the tabs. In addition, the foldable tab foldable flexible battery pack formed after the connection is completed can be disconnected from the series or parallel connection at any time as needed, so that the single cells therein can be used again as ordinary single cells flexible batteries, thereby overcoming the problems of the series and parallel connection method of the stacked battery pack, that the series and parallel operations are irreversible and each single cell flexible battery cannot be used individually again after the series and parallel connection is completed, thereby broadening the application scope of the foldable tab foldable flexible battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of a series-connected flexible battery pack with foldable tabs in the first embodiment of the present invention;

[0027] Figure 2This is a schematic structural diagram of the parallel connection of the first embodiment of the foldable tab flexible battery pack provided by the present invention;

[0028] Figure 3 This is a structural schematic diagram of a second embodiment of a foldable flexible battery pack with foldable tabs provided by the present invention;

[0029] Figure 4 A schematic structural diagram of a third embodiment of a foldable flexible battery pack with foldable tabs provided by the present invention;

[0030] Figure 5 This is a structural schematic diagram of a fourth embodiment of a foldable flexible battery pack with foldable tabs provided by the present invention;

[0031] Figure 6 This is a structural diagram of the fifth embodiment of the foldable tab-foldable flexible battery pack provided by the present invention;

[0032] Figure 7 This is a structural schematic diagram of a sixth embodiment of a foldable flexible battery pack with foldable tabs provided by the present invention;

[0033] Figure 8 This is a structural schematic diagram of the seventh embodiment of the foldable tab-foldable flexible battery pack provided by the present invention;

[0034] Figure 9 This is a structural schematic diagram of the eighth embodiment of the foldable tab foldable flexible battery pack provided by the utility model.

[0035] Description of Figure Numbers:

[0036] 1. Flexible substrate; 101. First base portion; 102. Second base portion; 103. Folding line;

[0037] 2. Cutting line;

[0038] 3. Single cell; 301. First cell; 302. Second cell;

[0039] 4. First target tab; 5. Second target tab; 6. Connection window.

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] 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 shall fall within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The open-circuit voltage, battery capacity, and other battery parameters of a single flexible battery are relatively small. In practical applications, multiple flexible batteries are often connected in series or parallel to form a flexible battery pack to achieve a higher open-circuit voltage and larger battery capacity. However, if the traditional battery pack manufacturing method is used to connect multiple flexible batteries in series and parallel multiple times, the production process of the flexible battery pack will be more complicated, with higher process requirements and costs. If the stacked battery pack manufacturing method is used to connect multiple flexible batteries in series and parallel, each flexible battery cannot be used individually, which greatly limits the scope of application. In addition, when multiple flexible batteries need to be stacked back and forth, it is easy to cause short circuit problems due to accidental contact between the tabs.

[0045] In order to solve the above problems, the utility model proposes a foldable flexible battery pack with foldable tabs, in which a cutting line is set on the flexible substrate to make the tabs of the single battery into a foldable form, and then the series or parallel connection of two single batteries can be achieved by folding the flexible substrate and folding the tabs. The flexible folding of the tabs effectively reduces the risk of short circuit caused by accidental contact of the tabs, and the two single batteries can be used separately after the series or parallel connection is subsequently released.

[0046] See also Figure 1 and Figure 2 In the first embodiment of the present invention, the folding tab folding flexible battery pack includes a flexible substrate 1, provided with a cutting line 2, and a folding portion (not shown in the figure) is formed within the cutting line 2;

[0047] At least two single cells 3 are linearly arranged on the flexible substrate 1; a folding line 103 is defined between at least two adjacent single cells 3; at least one single cell 3 has at least one first target tab 4, at least a portion of which is disposed on the folded portion;

[0048] When the flexible substrate 1 is folded along the folding line 103 , the first target tab 4 is used to contact the tab of another single battery 3 along with the folding portion.

[0049] In this embodiment, each single cell 3 is a flexible battery that can be used individually and has basic battery functions such as power storage and power supply; the tabs of the single cell 3 include a positive tab and a negative tab, and both the positive tab and the negative tab can serve as the first target tab 4.

[0050] The trajectory of the cutting line 2 can be set to a non-closed loop shape, for example, the cutting can be performed along three of the side lines of the rectangle, so that the folding portion after cutting can be rotated about the fourth side line of the rectangle, thereby realizing the folding operation. By setting the cutting line 2 on the flexible substrate 1, the first target electrode 4 within the cutting line 2 can be made into a foldable form; based on this structural form, the orientation of the first target electrode 4 can be flexibly adjusted through the folding operation, for example, when the first target electrode 4 is only set on one side of the flexible substrate 1, at least a part of the first target electrode 4 can be folded to the other side of the flexible substrate 1, thereby making it easier to connect the first target electrodes 4. It should be noted that in actual operation, the first target electrode 4 can be completely set within the cutting line 2 so that the entire first target electrode 4 forms a folding portion, that is, the entire first target electrode 4 can be folded, and at this time the first target electrode 4 does not need to be connected to an external circuit; it can also be as Figure 1 and Figure 2As shown, a portion of the first target tab 4 (for example, the end of the first target tab 4 away from the single battery cell 3) is arranged within the cutting line 2, so that a portion of the first target tab 4 forms a folded portion. Subsequently, only this portion of the first target tab 4 can be folded, and the non-foldable portion of the first target tab 4 can be used to connect to an external circuit.

[0051] For ease of understanding, Figure 1 and Figure 2 As an example, the two single cells 3 shown in FIG. Figure 1 For series connection, Figure 2 Regarding the parallel connection situation), the specific implementation of this embodiment is described as follows:

[0052] like Figure 1 As shown, the flexible substrate 1 is initially laid flat, with a folding line 103 provided in the middle of the flexible substrate 1 and dividing the flexible substrate 1 into a first base portion 101 and a second base portion 102. The single battery 3 located on the left side of the first base portion 101 is a first battery 301, and the single battery 3 located on the right side of the second base portion 102 is a second battery 302. The positive tab of the first battery 301 and the negative tab of the second battery 302 serve as first target tabs 4. The positive tab of the first battery 301 and the negative tab of the second battery 302 are both provided on the front surface of the flexible substrate 1. The cutting lines 2 are provided on the first base portion 101 and the second base portion 102, respectively. The right end of the positive tab of the first battery 301 is located within the cutting line 2 and forms a folded portion, and the left end of the negative tab of the second battery 302 is located within the cutting line 2 and forms another folded portion. Based on the above arrangement, the right end of the positive tab of the first battery 301 and the left end of the negative tab of the second battery 302 can be folded to the back of the flexible substrate 1. When the flexible substrate 1 is folded along the folding line 103, the back of the first base portion 101 and the back of the second base portion 102 are in contact. At this time, the portion of the positive tab of the first battery 301 that is folded to the back can contact the portion of the negative tab of the second battery 302 that is folded to the back. In this way, the electrical connection between the two tabs of opposite polarity in the first battery 301 and the second battery 302 is completed, thereby realizing the series connection between the two single cells 3.

[0053] For example Figure 2As shown, the flexible substrate 1 is laid flat in the initial state, and the folding line 103 is set in the middle of the flexible substrate 1 and divides the flexible substrate 1 into a first base portion 101 and a second base portion 102. The single battery 3 located on the left side of the first base portion 101 is the first battery 301, and the single battery 3 located on the right side of the second base portion 102 is the second battery 302. The positive and negative tabs of the first battery 301 and the positive and negative tabs of the second battery 302 are all used as the first target tab 4. The positive and negative tabs of the first battery 301 and the second battery 302 are used as the first target tab 4. The positive and negative ears of 02 are both arranged on the front side of the flexible substrate 1, and the cutting lines 2 are respectively arranged on the first base portion 101 and the second base portion 102. The right end portion of the positive ear of the first battery 301 is located within the cutting line 2 and forms a first folding portion, the right end portion of the negative ear of the first battery 301 is located within the cutting line 2 and forms a second folding portion, the left end portion of the positive ear of the second battery 302 is located within the cutting line 2 and forms a third folding portion, and the left end portion of the negative ear of the second battery 302 is located within the cutting line 2 and forms a fourth folding portion. Based on the above arrangement, the right ends of the positive and negative tabs of the first battery 301 and the left ends of the positive and negative tabs of the second battery 302 can be folded to the back of the flexible substrate 1; when the flexible substrate 1 is folded along the folding line 103, the back of the first base portion 101 fits in with the back of the second base portion 102. At this time, the portion of the positive tab of the first battery 301 folded to the back can contact the portion of the positive tab of the second battery 302 folded to the back, and the portion of the negative tab of the first battery 301 folded to the back can contact the portion of the negative tab of the second battery 302 folded to the back. In this way, the electrical connection between the two sets of tabs with the same polarity in the first battery 301 and the second battery 302 is completed, thereby realizing the parallel connection between the two single cells 3. Figure 2 In the specific embodiment shown, it is preferred that a portion of the first target tab 4 is disposed within the cutting line 2 so that a portion of the first target tab 4 forms a folded portion, and subsequently only this portion of the first target tab 4 can be folded, while the non-foldable portion of the first target tab 4 can be used to connect an external circuit.

[0054] It is understood that the above specific embodiments are only used to illustrate the implementation principle of this solution, and are not limited to the above methods during the specific implementation process. It is only necessary to ensure that the tabs can be folded using the folding portion formed by the cutting line 2, so that the corresponding tabs can be folded to the target orientation to achieve connection between the tabs. In addition, for two tabs that should not touch and are prone to accidental contact after the flexible substrate 1 is folded, the folding structure formed by the cutting line 2 can be used to fold one or both tabs to a position away from each other, thereby reducing the probability of the two tabs accidentally touching each other after folding, thereby reducing the risk of short circuits caused by accidental contact between the tabs.

[0055] It can be seen that in this embodiment, the cutting line 2 is provided on the flexible substrate 1 so that the first target tab 4 of the single battery 3 becomes foldable. On the one hand, the first target tab 4 can be flexibly adjusted to the front or back side of the flexible substrate 1 through the folding operation, which facilitates the contact between the first target tab 4 and other tabs, thereby conveniently realizing the series connection or parallel connection between the single batteries 3 in conjunction with the folding operation of the flexible substrate 1, and connecting multiple single batteries 3 in a low-cost and easy-to-operate manner to form a foldable tab foldable flexible battery pack with higher open-circuit voltage and larger battery capacity; on the other hand, the two tabs that should not be in contact can be adjusted to positions deviated from each other through the folding operation, thereby reducing the probability of the two tabs accidentally contacting each other after the flexible substrate 1 is folded, thereby reducing the risk of short circuit caused by accidental contact between the tabs. In addition, the foldable tab foldable flexible battery pack formed after the connection is completed can be disconnected from the series or parallel connection at any time as needed, so that the single cell 3 therein can be used again as an ordinary single cell flexible battery, thereby overcoming the problem that the series and parallel operation of the stacked battery pack is irreversible and each single cell flexible battery cannot be used separately again after the series and parallel connection is completed, thereby broadening the application scope of the foldable tab foldable flexible battery pack.

[0056] Optionally, refer to Figure 3 The single battery 3 further has a second target tab 5 , which passes through the front and back surfaces of the flexible substrate 1 ; the second target tabs 5 of at least two adjacent single batteries 3 are used to contact each other after the flexible substrate 1 is folded along the folding line 103 .

[0057] by Figure 3As shown in the example, the negative electrode tab of the first battery 301 and the negative electrode tab of the second battery 302 serve as the first target tab 4 and are arranged on the front surface of the flexible substrate 1. The cutting lines 2 are respectively arranged on the first base portion 101 and the second base portion 102. The negative electrode tab of the first battery 301 is located within the cutting line 2 and forms a first folding portion, and the negative electrode tab of the second battery 302 is located within the cutting line 2 and forms a second folding portion; the positive electrode tab of the first battery 301 and the positive electrode tab of the second battery 302 serve as the second target tab 5 and pass through the front and back surfaces of the flexible substrate 1. Based on the above arrangement, the negative tabs of the first battery 301 and the negative tabs of the second battery 302 can be folded to the back side of the flexible substrate 1. When the flexible substrate 1 is folded along the folding line 103, the back side of the first base portion 101 and the back side of the second base portion 102 are in contact with each other. At this time, the portion of the negative tab of the first battery 301 folded to the back side can contact the portion of the negative tab of the second battery 302 folded to the back side, and the portion of the positive tab of the first battery 301 located on the back side of the flexible substrate 1 can contact the portion of the positive tab of the second battery 302 located on the back side of the flexible substrate 1. In this way, the two sets of tabs with the same polarity in the first battery 301 and the second battery 302 are electrically connected, thereby achieving a parallel connection between the two single cells 3.

[0058] The above concept can be applied between any two adjacent single cells 3 on the flexible substrate 1, so as to complete the connection between the two sets of tabs with the same polarity in the two single cells 3 through a folding operation, thereby conveniently realizing the parallel connection between the two single cells 3; and the specific distribution form of the single cells 3, the arrangement form of the tab positions, etc., can be flexibly set according to the actual application situation based on the above concept, and will not be repeated here.

[0059] Optionally, refer to Figure 4 The cutting line 2 is set on the first base portion 101, and the second base portion 102 is provided with a connection window 6; when the flexible substrate 1 is folded along the folding line 103, the first target tab 4 of the first battery 301 is used to pass through the connection window 6 as the folding portion is folded, and the first target tab 4 of the first battery 301 is used to connect with the tab of the second battery 302 after passing through the connection window 6.

[0060] In this embodiment, only the tab of the first battery 301 is used as the foldable first target tab 4, and no cutting line 2 is set around the tab of the second battery 302. Instead, a connection window 6 is opened near the tab of the second battery 302. In this way, the first target tab 4 of the first battery 301 can pass through the connection window 6 after being folded and reach the area where the tab of the second battery 302 is located, thereby also achieving connection between the tab of the first battery 301 and the tab of the second battery 302.

[0061] Specifically, Figure 4As shown in the figure, the positive and negative tabs of the first battery 301 are used as the first target tabs 4 that can be folded, and connection windows 6 are opened near the positive and negative tabs of the second battery 302. When the flexible substrate 1 is folded along the folding line 103, the positive and negative tabs of the first battery 301 can be folded according to the position of the connection windows 6, so that the positive tab of the first battery 301 passes through the upper connection window 6 and connects to the positive tab of the second battery 302, and the negative tab of the first battery 301 passes through the lower connection window 6 and connects to the negative tab of the second battery 302, thereby achieving a parallel connection between the first battery 301 and the second battery 302. It should be noted that the positive and negative tabs of the first battery 301 can be extended as needed to ensure that they have sufficient length for the folding operation.

[0062] Optionally, refer to Figure 5 At least one single battery cell 3 has two first target tabs 4 , and a cutting line 2 is provided around each first target tab 4 , and a folding portion is formed within each cutting line 2 .

[0063] The cutting lines 2 in this embodiment are arranged in one-to-one correspondence with the first target tabs 4, so that different first target tabs 4 can be folded in different forms and angles, thereby making the adjustment flexibility of the first target tabs 4 higher and applicable to more different connection situations.

[0064] Optionally, refer to Figure 6 At least one single battery cell 3 has two first target tabs 4 , and the two first target tabs 4 are arranged on the folding portion and are used to be folded simultaneously with the folding portion.

[0065] The cutting line 2 and the first target tabs 4 in this embodiment adopt a one-to-many form. A folding portion formed by the cutting line 2 has two first target tabs 4. In this way, the two first target tabs 4 can be folded at the same time, thereby simplifying the manufacturing process and improving the folding efficiency.

[0066] Optionally, refer to Figure 7 , at least one tab of the first battery 301 crosses the folding line 103 and extends to the second base portion 102 ; or, at least one tab of the second battery 302 crosses the folding line 103 and extends to the first base portion 101 .

[0067] The tabs of a single cell 3, in addition to being used to connect to the tabs of another single cell 3 to achieve series and parallel connection, can also be used as external electrodes of the foldable tab foldable flexible battery pack and connected to the external battery contact terminals of an electrical device to achieve electrical connection between the foldable tab foldable flexible battery pack and the electrical device, allowing the foldable tab foldable flexible battery pack to power the electrical device. When the positive and negative poles of the external electrodes are located on the same plane, it is easier to connect the foldable tab foldable flexible battery pack to the external battery contact terminals of the electrical device through the external electrodes.

[0068] Based on the above considerations, in one specific implementation of this embodiment, the tab of the first battery 301 that is to be used as an external electrode is extended to the second base portion 102. When the flexible substrate 1 is folded along the folding line 103, the portion of the tab extending to the second base portion 102 will be located on the same plane as the tab of the second battery 302 that is also to be used as an external electrode. In another specific implementation of this embodiment, the tab of the second battery 302 that is to be used as an external electrode is extended to the first base portion 101. When the flexible substrate 1 is folded along the folding line 103, the portion of the tab extending to the first base portion 101 will be located on the same plane as the tab of the first battery 301 that is also to be used as an external electrode. Based on the above arrangement, it is more convenient to use the two tabs with opposite polarities and coplanar as the positive and negative poles of the external electrodes and connect them to the external battery contact terminals of the electrical device, thereby conveniently achieving electrical connection between the foldable tab foldable flexible battery pack and the electrical device.

[0069] Specifically, Figure 7As shown in the figure, the positive tab of the first battery 301 and the negative tab of the second battery 302 are taken as the first target tab 4. The positive tab of the first battery 301 and the negative tab of the second battery 302 are both arranged on the front side of the flexible substrate 1. The cutting lines 2 are respectively arranged on the first base portion 101 and the second base portion 102. The positive tab of the first battery 301 is located within the cutting line 2 and forms a folded portion, and the negative tab of the second battery 302 is located within the cutting line 2 and forms another folded portion. The negative tab of the first battery 301 and the positive tab of the second battery 302 are used as external electrodes of the folded tab folded flexible battery pack, and the positive tab of the second battery 302 crosses the folding line 103 to the left and extends to the first base portion 101. Based on the above arrangement, the positive tab of the first battery 301 and the negative tab of the second battery 302 can be folded to the back side of the flexible substrate 1. When the flexible substrate 1 is folded along the folding line 103, the back side of the first base portion 101 and the back side of the second base portion 102 are in contact with each other. At this time, the portion of the positive tab of the first battery 301 that is folded to the back side can contact the portion of the negative tab of the second battery 302 that is folded to the back side. In this way, the electrical connection between the two tabs of opposite polarity in the first battery 301 and the second battery 302 is completed, thereby realizing the series connection between the two single cells 3. Moreover, the negative tab of the first battery 301 and the positive tab of the second battery 302 are also located on the same plane after folding. This makes it easier to use the negative tab of the first battery 301 and the positive tab of the second battery 302 as external electrodes of the folded-tab folded flexible battery pack and connect them to the external battery contact terminals of the electrical device.

[0070] Optionally, refer to Figure 8 , at least a portion of the cutting line 2 coincides with the edge of the flexible substrate 1; in this way, the first target tab 4 can be folded by folding the edge of the flexible substrate 1, without the need to cut along the cutting line 2, or the number of cutting times can be reduced, thereby improving ease of use.

[0071] Optionally, refer to Figure 9 The number of single cells 3 is at least four, and a folding line 103 is provided between each group of two adjacent single cells 3, and the folding directions corresponding to the two adjacent folding lines 103 are opposite;

[0072] A cutting line 2 is provided around each tab of each single battery 3 , and a folding portion is formed within each cutting line 2 .

[0073] Specifically, Figure 9 Taking the four single cells 3 shown as an example, the specific implementation of this embodiment is described as follows:

[0074] In the initial state, the flexible substrate 1 is laid flat, and the positive and negative tabs of the four single batteries 3 are each provided with cutting lines 2 around them and can be folded over. A total of three folding lines 103 are provided on the flexible substrate 1, wherein the folding directions corresponding to the folding lines 103 on both sides are opposite to the folding direction corresponding to the folding line 103 in the middle. Based on the above arrangement, after the flexible substrate 1 is folded along the three folding lines 103 in the corresponding folding directions, the corresponding tabs are folded so that the positive tab of the first single cell 3 from the left contacts the negative tab of the second single cell 3 from the left, the positive tab of the second single cell 3 from the left contacts the negative tab of the third single cell 3 from the left, and the positive tab of the third single cell 3 from the left contacts the negative tab of the fourth single cell 3 from the left. In this way, the four single cells 3 are connected in series to form a complete folded tab folded flexible battery pack; the negative tab of the first single cell 3 from the left and the positive tab of the fourth single cell 3 from the left are folded to a position where they are not in contact after folding, and the negative tab of the first single cell 3 from the left and the positive tab of the fourth single cell 3 from the left are used as external electrodes of the folded tab folded flexible battery pack and are connected to the external battery contact terminal of the electrical device to supply power to the electrical device.

[0075] If the number of single cells 3 is set to four or more, the above-mentioned embodiment can be used for the same configuration, so that the multiple single cells 3 can be connected in series or in parallel by folding the flexible substrate 1 in conjunction with the folding operation of the corresponding tabs. The folding operation can also prevent the tabs from accidentally contacting each other and causing a short circuit, which will not be described in detail here.

[0076] Optionally, refer to Figures 1 to 9 A conductive bridge layer (not shown in the figure) is provided on the back of the flexible substrate 1 , and the first target tab 4 is used to connect to the tab of another single battery 3 through the conductive bridge layer.

[0077] Specifically, after the first target tab 4 is connected to the tab of another single cell 3 by folding the tab, a conductive bridge layer can be further used to connect the two tabs to serve as an auxiliary connection. The provision of the conductive bridge layer can strengthen the connection stability between the first target tab 4 and the tab of the other single cell 3, to a certain extent avoiding the uncertainties in the cutting, folding, and folding processes, and avoiding the problem of poor connection due to inadequate contact between the tabs. The conductive bridge layer can be made of any solid or liquid conductive medium, such as a conductive sheet, electrolyte, etc., and is not limited here. The direction of the conductive bridge layer is not limited to a straight line and can also be arranged in a corner. In this way, it can be used to connect two tabs that are not arranged symmetrically with respect to the fold line 103, thereby improving applicability.

[0078] Optionally, refer to Figures 1 to 9At least one tab of the single cell 3 has a serrated structure (not shown). When the two tabs contact each other after the flexible substrate 1 is folded, the serrated structure on the tab surface engages, strengthening the connection between the tabs. This reduces internal resistance and improves the operational stability of the foldable tab flexible battery pack.

[0079] Optionally, refer to Figures 1 to 9 Thus, when any single battery cell 3 needs to be used alone, the operator can easily tear the flexible substrate 1 along the folding line 103, thereby quickly separating the single battery cell 3 from the flexible substrate 1 without the aid of other tools.

[0080] Optionally, refer to Figures 1 to 9 The surface of the flexible substrate 1 is provided with an adhesive layer (not shown in the figure); wherein the adhesive layer can be made of a sticky glue layer or other adhesive material, and the adhesive layer can be provided on the front, back or other positions of the flexible substrate 1 as needed.

[0081] By providing an adhesive layer, on the one hand, the two parts of the flexible substrate 1 that are in contact with each other after folding can be bonded together, so that the connection between the corresponding tabs is tighter, and the folded tab folded flexible battery pack can stably maintain the folded state, thereby improving the structure and operation stability of the folded tab folded flexible battery pack; on the other hand, the flexible substrate 1 can be bonded to other devices, thereby realizing the connection and fixation between the flexible battery and external devices in a convenient and easy-to-operate manner, broadening its scope of use.

[0082] See also Figures 1 to 9 The present invention also provides an electrical device, including the foldable tab foldable flexible battery pack in any of the above embodiments.

[0083] In this embodiment, the electrical devices include wearable devices, terminal devices, and other devices that require electrical energy to operate. The foldable tab foldable flexible battery pack can output the stored electrical energy to the electrical device through the connection between the corresponding tabs and the external battery contact terminals of the electrical device to realize the power supply operation of the electrical device. For the specific structure of the foldable tab foldable flexible battery pack, reference can be made to the above embodiments. Since the electrical device in this embodiment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0084] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A foldable flexible battery pack with foldable tabs, characterized in that: include: The flexible substrate is provided with a cutting line, and a folding portion is formed within the cutting line; At least two single cells are linearly arranged on the flexible substrate; A folding line is provided between at least two adjacent single cells in a group; at least one single cell has at least one first target tab, and at least a portion of the first target tab is provided on the folded portion; When the flexible substrate is folded along the folding line, the first target tab is used to contact a tab of another single battery as the folding portion is folded.

2. The foldable flexible battery pack with foldable tabs according to claim 1, characterized in that: The single battery further has a second target tab, which passes through the front and back surfaces of the flexible substrate. The second target tabs of at least two adjacent single batteries are configured to contact each other after the flexible substrate is folded along the folding line.

3. The foldable flexible battery pack with foldable tabs according to claim 1, wherein: The folding line divides the flexible substrate into a first base portion and a second base portion; a group of two adjacent single cells are used as a first battery and a second battery, respectively, with the first battery located at the first base portion and the second battery located at the second base portion; The cutting line is set at the first base portion, and a connection window is opened at the second base portion; when the flexible substrate is folded along the folding line, the first target tab of the first battery is used to pass through the connection window as the folding portion is folded, and the first target tab of the first battery is used to be connected to the tab of the second battery after passing through the connection window.

4. The foldable flexible battery pack with foldable tabs according to claim 1, wherein: A conductive bridge layer is provided on the back side of the flexible substrate, and the first target tab is used to be connected to a tab of another single battery through the conductive bridge layer.

5. The foldable flexible battery pack with foldable tabs according to claim 1, wherein: At least one of the single cells has two first target tabs. A cutting line is provided around each of the first target tabs, and a folding portion is formed within each of the cutting lines.

6. The foldable flexible battery pack with foldable tabs according to claim 1, wherein: At least one of the single cells has two first target tabs, and the two first target tabs are arranged on the folding portion and are configured to be folded simultaneously with the folding portion.

7. The foldable flexible battery pack with foldable tabs according to claim 1, wherein: The folding line divides the flexible substrate into a first base portion and a second base portion; a group of two adjacent single cells are used as a first battery and a second battery, respectively, with the first battery located at the first base portion and the second battery located at the second base portion; At least one tab of the first battery extends beyond the folding line and to the second base portion; And / or, at least a portion of the cutting line coincides with a side line of the flexible substrate.

8. The foldable flexible battery pack with foldable tabs according to claim 1, wherein: The number of the single cells is at least four, and a folding line is provided between two adjacent single cells in each group, and the folding directions corresponding to the two adjacent folding lines are opposite; The periphery of each tab of each single battery is provided with the cutting line, and a folding portion is formed within each cutting line.

9. The foldable flexible battery pack according to any one of claims 1 to 8, wherein: At least one tab surface of the single battery is provided with a serrated structure; And / or, the folding line is configured as a tearing line; And / or, an adhesive layer is provided on the surface of the flexible substrate.

10. An electrical device, characterized in that: A foldable flexible battery pack comprising the foldable tabs according to any one of claims 1 to 9.

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