Flexible folding parallel battery pack and electric device

Abstract

The utility model discloses a flexible folding parallel battery pack and an electric device, and relates to the technical field of flexible batteries, the flexible folding parallel battery pack comprises a flexible substrate and at least two single batteries linearly arranged on the flexible substrate; a folding line is arranged between every two adjacent single batteries; at least two adjacent single batteries are provided with first target tabs with the same polarity and second target tabs with the same polarity, the first target tabs penetrate through the front surface and the back surface of the flexible substrate, and the second target tabs are electrically connected; the first target tabs of at least two adjacent single batteries are in contact to realize electrical connection after the flexible substrate is folded along the folding line. According to the scheme, the tabs with the same polarity in the two single batteries can be contacted by simply folding the flexible substrate, so that the parallel connection between the single batteries is realized in a low-cost and easy-to-operate manner; and the parallel connection mode can be removed at any time as required, so that the single battery can be used as a common single flexible battery.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible batteries, in particular to a flexible foldable parallel 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 battery capacity and other battery parameters of a single flexible battery are relatively small. In practical applications, multiple flexible batteries are often connected in parallel to form a flexible battery pack to obtain a larger battery capacity. However, if multiple flexible batteries are connected in parallel in multiple steps using the traditional battery pack manufacturing method, the flexible battery pack manufacturing process is cumbersome, with high process requirements and costs. If multiple flexible batteries are connected in parallel using the laminated battery pack manufacturing method, each flexible battery cannot be used independently, which greatly limits the scope of application. Utility Model Content

[0004] The main purpose of the utility model is to propose a flexible foldable parallel battery pack, which aims to form a flexible battery pack by connecting multiple flexible batteries in parallel in a simple, easy-to-operate and low-cost manner without affecting the individual use of each flexible battery.

[0005] To achieve the above objectives, the flexible foldable parallel battery pack proposed in the present invention includes:

[0006] Flexible substrate;

[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 two adjacent single cells have a first target tab with the same polarity and a second target tab with the same polarity, the first target tab passes through the front and back sides of the flexible substrate, and the second target tabs are electrically connected; the first target tabs of at least two adjacent single cells are configured to contact each other after the flexible substrate is folded along the corresponding folding line to achieve electrical connection.

[0008] In one embodiment, the second target tabs penetrate the front and back surfaces of the flexible substrate, and 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 corresponding folding lines.

[0009] In one embodiment, a first tab extension layer is provided on the back surface of the flexible substrate, and the first tab extension layer is connected to the first target tabs of two of the monomer cells connected in parallel.

[0010] In one embodiment, a second tab extension layer is provided on the back surface of the flexible substrate, and the second tab extension layer is connected to the second target tabs of two of the monomer cells connected in parallel.

[0011] In one embodiment, the folding line divides the flexible substrate into a first base portion and a second base portion; taking two adjacent and parallel monomer cells as a first cell and a second cell respectively, the first cell is located in the first base portion, and the second cell is located in the second base portion;

[0012] The first target tab of the first cell extends to the edge of the first base portion; when the flexible substrate is folded along the folding line, the first target tab of the second cell is within the orthographic projection range of the first target tab of the first cell;

[0013] And / or, the second target tab of the first cell extends to the edge of the first base portion; when the flexible substrate is folded along the folding line, the second target tab of the second cell is within the orthographic projection range of the second target tab of the first cell.

[0014] In one embodiment, a conductive bridge layer is provided on the flexible substrate, and the second target tabs are connected through the conductive bridge layer.

[0015] In one embodiment, the folding line divides the flexible substrate into a first base portion and a second base portion; taking two adjacent and parallel monomer cells as a first cell and a second cell respectively, the first cell is located in the first base portion, and the second cell is located in the second base portion;

[0016] A first cutting line is provided around the second target tab of the first cell, and a second cutting line is provided around the second target tab of the second cell; when the flexible substrate is folded along the folding line, the second target tab of the first cell is used to connect to the second target tab of the second cell.

[0017] In one embodiment, a third cutting line is provided around the second target tab of the first cell, and a connection window is formed in the second base portion, and the connection window is adjacent to the second target tab of the second cell; when the flexible substrate is folded along the folding line, the second target tab of the first cell is used to pass through the connection window and connect to the second target tab of the second cell.

[0018] In one embodiment, the number of the single cells is at least four, and a folding line is provided between each adjacent pair of the single cells, and the folding directions corresponding to two adjacent folding lines are opposite; the first target tabs and the second target tabs of each adjacent pair of the single cells are symmetrically arranged with respect to the corresponding folding line.

[0019] In one embodiment, the number of the single cells is four, and the first target tabs and the second target tabs of the two single cells located in the middle of the flexible substrate penetrate through the front and back surfaces of the flexible substrate, and the first target tabs and the second target tabs of the two single cells located at both ends of the flexible substrate are arranged on the front surface of the flexible substrate;

[0020] The flexible substrate is further provided with a first folding line and a second folding line, the first folding line passes through the first target tab and the second target tab of the single cell at one end of the flexible substrate, and the second folding line passes through the first target tab and the second target tab of the single cell at the other end of the flexible substrate.

[0021] In one embodiment, a serrated structure is provided on the surface of at least one of the first target tabs and / or on the surface of at least one of the second target tabs.

[0022] In one embodiment, the folding line is provided as an easy-to-tear line.

[0023] In one embodiment, an adhesive layer is provided on the surface of the flexible substrate.

[0024] The present utility model further provides an electrical device, including the flexible folding parallel battery pack as described above.

[0025] The technical solution of the present utility model sets the first target tabs with the same polarity in at least two single cells to penetrate through the front and back surfaces of the flexible substrate, and connects the second target tabs with the same polarity in the at least two single cells to each other. In this way, by simply folding the flexible substrate, the first target tabs with the same polarity in the at least two single cells can be brought into contact, thereby realizing the parallel connection between the single cells in a low-cost and easy-to-operate manner; moreover, this parallel connection form can be released at any time as needed to reuse the single cells as ordinary single flexible batteries, thus overcoming the problems existing in the parallel connection method of the stacked battery pack, such as the irreversibility of the parallel connection operation and the inability to use each single flexible battery separately after the parallel connection is completed, and broadening the application range of the flexible folding parallel battery pack. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0027] Figure 1 Schematic diagram of the front structure of the flexible substrate of the first embodiment of the flexible folding parallel battery pack provided by the present invention;

[0028] Figure 2 Schematic diagram of the back structure of the flexible substrate of the first embodiment of the flexible folding parallel battery pack provided by the present invention;

[0029] Figure 3 Schematic diagram of the back structure of the flexible substrate of the second embodiment of the flexible folding parallel battery pack provided by the present invention;

[0030] Figure 4 Schematic diagram of the front structure of the flexible substrate of the third embodiment of the flexible folding parallel battery pack provided by the present invention;

[0031] Figure 5 Schematic diagram of the back structure of the flexible substrate of the third embodiment of the flexible folding parallel battery pack provided by the present invention;

[0032] Figure 6 Schematic diagram of the front structure of the flexible substrate of the fourth embodiment of the flexible folding parallel battery pack provided by the present invention;

[0033] Figure 7 Schematic diagram of the front structure of the flexible substrate of the fifth embodiment of the flexible folding parallel battery pack provided by the present invention;

[0034] Figure 8 Schematic diagram of the front structure of the flexible substrate of the sixth embodiment of the flexible folding parallel battery pack provided by the present invention;

[0035] Figure 9 Schematic diagram of the front structure of the flexible substrate of the seventh embodiment of the flexible folding parallel battery pack provided by the present invention;

[0036] Figure 10 Schematic diagram of the front structure of the flexible substrate of the eighth embodiment of the flexible folding parallel battery pack provided by the present invention;

[0037] Figure 11 Schematic diagram of the front structure of the flexible substrate of the ninth embodiment of the flexible folding parallel battery pack provided by the present invention;

[0038] Figure 12Schematic diagram of the reverse side structure of the flexible substrate of the tenth embodiment of the flexible folding parallel battery pack provided by the present utility model.

[0039] Explanation of the reference numerals in the attached drawings:

[0040] 1. Flexible substrate; 101. First base part; 102. Second base part; 103. Folding line; 104. First folding line; 105. Second folding line;

[0041] 2. Single cell; 201. First cell; 202. Second cell;

[0042] 3. First target tab; 4. Second target tab; 5. First tab extension layer; 6. Second tab extension layer; 7. Conductive bridge layer; 8. First cutting line; 9. Second cutting line; 10. Third cutting line; 11. Connection window; 12. Adhesive layer.

[0043] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the attached drawings. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0045] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, if descriptions such as "first", "second", etc. are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0047] The battery parameters such as the battery capacity of a single flexible battery are relatively small. In actual applications, multiple flexible batteries are often formed into a flexible battery pack through parallel connection or other modes to obtain a larger battery capacity. However, if the traditional manufacturing method of a battery pack is used to connect multiple flexible batteries in parallel in multiple steps, the manufacturing process of the flexible battery pack will be relatively cumbersome, with high process requirements and costs. And if the manufacturing method of a stacked battery pack is used to connect multiple flexible batteries in parallel, each flexible battery among them cannot be used alone, thus greatly limiting the application scope.

[0048] To solve the above problems, the present utility model proposes a flexible folding parallel battery pack, which can achieve the parallel connection of two single flexible batteries through a simple folding operation, and the two single flexible batteries can still be used alone after the parallel connection is released subsequently.

[0049] Please refer to Figure 1 and Figure 2 , in the first embodiment of the present utility model, the flexible folding parallel battery pack includes a flexible substrate 1 and at least two single batteries 2; at least two single batteries 2 are linearly arranged on the flexible substrate 1; a folding line 103 is provided between at least one group of adjacent two single batteries 2; at least two adjacent single batteries 2 have a first target tab 3 with the same polarity and a second target tab 4 with the same polarity. The first target tab 3 penetrates the front and back of the flexible substrate 1, and the second target tabs 4 are electrically connected; the first target tabs 3 of at least two adjacent single batteries 2 are used to contact each other after the flexible substrate 1 is folded along the corresponding folding line 103 to achieve electrical connection.

[0050] In this embodiment, each single battery 2 is a flexible battery that can be used independently and has basic battery functions such as electrical energy storage and electrical energy supply; the tabs of the single battery 2 include a positive tab and a negative tab, and both the positive tab and the negative tab can serve as the first target tab 3 or the second target tab 4; generally speaking, each single battery 2 has one first target tab 3 and one second target tab 4, the first target tab 3 of each single battery 2 has the same polarity as the first target tab 3 of another single battery 2, and the second target tab 4 of each single battery 2 has the same polarity as the second target tab 4 of another single battery 2.

[0051] For ease of understanding, now taking Figure 1 and Figure 2 the two single batteries 2 shown as an example ( Figure 1 shows the front side of the flexible substrate 1, Figure 2 shows the back side of the flexible substrate 1; it can be understood that, for the purpose of intuitively corresponding the positions of the tabs on the front and back sides of the flexible substrate 1, Figure 2 the corresponding features in Figure 1 are directly set at the same position as Figure 1 without adjusting the position after flipping), the specific implementation of this embodiment is described as follows:

[0052] The flexible substrate 1 is laid flat in the initial state, the folding line 103 is arranged in the middle of the flexible substrate 1, and the two single batteries 2 are respectively located on the left and right sides of the folding line 103; the positive tabs of the left single battery 2 and the right single battery 2 can both serve as the first target tab 3 and penetrate through the front and back sides of the flexible substrate 1, the negative tabs of the left single battery 2 and the right single battery 2 can both serve as the second target tab 4 and penetrate through the front and back sides of the flexible substrate 1, the positive tab of the left single battery 2 and the positive tab of the right single battery 2 are symmetrically arranged with respect to the folding line 103, and the negative tab of the left single battery 2 and the negative tab of the right single battery 2 are symmetrically arranged with respect to the folding line 103. When the flexible substrate 1 is folded along the folding line 103, the left side and the right side on the back side of the flexible substrate 1 are attached to each other. At this time, the part of the positive tab of the left single battery 2 located on the back side of the flexible substrate 1 can be in contact with the part of the positive tab of the right single battery 2 located on the back side of the flexible substrate 1, and the part of the negative tab of the left single battery 2 located on the back side of the flexible substrate 1 can be in contact with the part of the negative tab of the right single battery 2 located on the back side of the flexible substrate 1. In this way, the electrical connection between the two first target tabs 3 with the same polarity and the electrical connection between the two second target tabs 4 with the same polarity in the two single batteries 2 are completed, thereby realizing the parallel connection between the two single batteries 2.

[0053] It should be noted that in addition to the above connection method, the second target tabs 4 of the two single-cell batteries 2 can also be brought into contact with the second target tabs 4 of another single-cell battery 2 by means of cutting, setting connection channels or adapters, so as to realize the electrical connection between the second target tabs 4 of the two single-cell batteries 2.

[0054] The above concept can be applied to any two adjacent single-cell batteries 2 on the flexible substrate 1 to complete the connection between the tabs with the same polarity in the two single-cell batteries 2 through a folding operation, so as to conveniently realize the parallel connection between the two single-cell batteries 2; regarding the specific distribution form of the single-cell batteries 2, the arrangement form of the electrode positions, etc., they can be flexibly set according to the actual application situation on the basis of the above concept, which will not be elaborated here. When at least two single-cell batteries 2 are connected in parallel by the above method, a complete flexible folding parallel battery pack can be formed.

[0055] It can be seen that in this embodiment, the first target tabs 3 with the same polarity in at least two single-cell batteries 2 are set to penetrate the front and back of the flexible substrate 1, and the second target tabs 4 with the same polarity in the at least two single-cell batteries 2 are connected to each other. In this way, a simple folding operation on the flexible substrate 1 can make the first target tabs 3 with the same polarity in the at least two single-cell batteries 2 come into contact, so as to realize the parallel connection between the single-cell batteries 2 in a low-cost and easy-to-operate manner; moreover, this parallel connection form can be released at any time as needed to use the single-cell batteries 2 as ordinary single flexible batteries again, thus overcoming the problems existing in the parallel connection method of the laminated battery pack, such as the irreversibility of the parallel connection operation and the inability of each single flexible battery after parallel connection to be used alone again, and broadening the application scope of this flexible folding parallel battery pack.

[0056] Optionally, referring to Figure 1 and Figure 2 , the folding line 103 divides the flexible substrate 1 into a first base part 101 and a second base part 102; taking one group of two adjacent and parallel single-cell batteries 2 as the first battery 201 and the second battery 202 respectively, the first battery 201 is located on the first base part 101, and the second battery 202 is located on the second base part 102;

[0057] The second target tabs 4 penetrate the front and back of the flexible substrate 1, and the second target tabs 4 of at least two adjacent single-cell batteries 2 are used to come into contact after the flexible substrate 1 is folded along the corresponding folding line 103.

[0058] Still taking the two single-cell batteries 2 shown in Figure 1 and Figure 2 as an example ( Figure 1 shows the front of the flexible substrate 1, Figure 2Shown is the reverse side of the flexible substrate 1; it can be understood that for the convenience of visually corresponding the positions of the tabs on the front and reverse sides of the flexible substrate 1, Figure 2 the corresponding features in Figure 1 are directly set at the same position as

[0059] without any position adjustment after flipping), and the specific implementation of this embodiment is described as follows:

[0060] 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. The left side of the folding line 103 is the first base part 101, and the right side of the folding line 103 is the second base part 102. The positive tabs of the first battery 201 and the second battery 202 serve as the first target tabs 3 and penetrate through the front and reverse sides of the flexible substrate 1. The negative tabs of the first battery 201 and the second battery 202 serve as the second target tabs 4 and penetrate through the front and reverse sides of the flexible substrate 1. The positive tab of the first battery 201 and the positive tab of the second battery 202 are symmetrically arranged with respect to the folding line 103, and the negative tab of the first battery 201 and the negative tab of the second battery 202 are symmetrically arranged with respect to the folding line 103. When the flexible substrate 1 is folded along the folding line 103, the reverse side of the first base part 101 is attached to the reverse side of the second base part 102. At this time, the part of the positive tab of the first battery 201 located on the reverse side of the flexible substrate 1 can be in contact with the part of the positive tab of the second battery 202 located on the reverse side of the flexible substrate 1, and the part of the negative tab of the first battery 201 located on the reverse side of the flexible substrate 1 can be in contact with the part of the negative tab of the second battery 202 located on the reverse side of the flexible substrate 1. In this way, the electrical connection between the two first target tabs 3 with the same polarity among the two single cells 2 and the electrical connection between the two second target tabs 4 with the same polarity are completed, thereby realizing the parallel connection between the two single cells 2.

[0061] Optionally, referring to Figure 3 , a first tab extension layer 5 is provided on the back of the flexible substrate 1, and the first tab extension layer 5 is connected to the first target tabs 3 of the two single cells 2 connected in parallel.

[0062] Optionally, referring to Figure 3 , a second tab extension layer 6 is provided on the back of the flexible substrate 1, and the second tab extension layer 6 is connected to the second target tabs 4 of the two single cells 2 connected in parallel.

[0063] By providing the first tab extension layer 5 and the second tab extension layer 6, the connection stability between the first target tabs 3 and the connection stability between the second target tabs 4 can be enhanced. The first tab extension layer 5 and the second tab extension layer 6 can be made of any conductive medium, preferably conductive adhesive.

[0064] Optionally, referring to Figure 6 , the first target tab 3 of the first battery 201 extends to the edge of the first base 101; when the flexible substrate 1 is folded along the folding line 103, the first target tab 3 of the second battery 202 is within the orthographic projection range of the first target tab 3 of the first battery 201.

[0065] Optionally, the second target tab 4 of the first battery 201 extends to the edge of the first base 101; when the flexible substrate 1 is folded along the folding line 103, the second target tab 4 of the second battery 202 is within the orthographic projection range of the second target tab 4 of the first battery 201.

[0066] Specifically, taking Figure 4 and Figure 5 as an example, the positive tab and the negative tab of the first battery 201 can be arranged on the side facing away from the second battery 202, and the positive tab and the negative tab of the second battery 202 can also be arranged on the side facing away from the first battery 201, and the positive tab and the negative tab of the first battery 201 and the positive tab and the negative tab of the second battery 202 are symmetrically arranged with respect to the folding line 103; on this basis, referring to Figure 6 , the positive tab and the negative tab of the first battery 201 can be further extended along the direction away from the second battery 202 to the left edge of the flexible substrate 1, so as to ensure that the coverage area of the positive tab and the negative tab of the first battery 201 on the flexible substrate 1 is larger than the coverage area of the positive tab and the negative tab of the second battery 202 on the flexible substrate 1; when the flexible substrate 1 is folded along the folding line 103, the positive tab of the first battery 201 can completely cover the positive tab of the second battery 202, and the negative tab of the first battery 201 can completely cover the negative tab of the second battery 202, thereby making the connection between the tabs of the first battery 201 and the second battery 202 more stable and improving the stability of the flexible folding parallel battery pack during subsequent operation.

[0067] Similarly, based on the electrode arrangement forms shown in Figure 4 and Figure 5 , the positive tab and the negative tab of the second battery 202 can also be further extended along the direction away from the first battery 201 to the right edge of the flexible substrate 1, so as to ensure that the positive tab and the negative tab of the second battery 202 can completely cover the positive tab and the negative tab of the first battery 201 respectively after folding, so as to achieve the same effect of improving the connection stability of the tabs.

[0068] Optionally, referring to Figure 7 and Figure 8 , a conductive bridge layer 7 is provided on the flexible substrate 1, and the second target tabs 4 are connected through the conductive bridge layer 7.

[0069] In this embodiment, the second target tabs 4 can be connected through the conductive bridge layer 7 before the flexible substrate 1 is folded, without relying on the folding operation of the flexible substrate 1 to complete the connection, thereby avoiding the uncertain factors existing in the folding process to a certain extent and ensuring the connection stability between the second target tabs 4. Specifically, taking Figure 7 as an example, the negative tabs of the first battery 201 and the negative tabs of the second battery 202 serve as the first target tabs 3 and penetrate through the front and back sides of the flexible substrate 1, and the positive tabs of the first battery 201 and the positive tabs of the second battery 202 serve as the second target tabs 4 and are arranged on the front side of the flexible substrate 1. The conductive bridge layer 7 is also arranged on the front side of the flexible substrate 1. The left end of the conductive bridge layer 7 is connected to the positive tab of the first battery 201, and the right end of the conductive bridge layer 7 is connected to the positive tab of the second battery 202; when the flexible substrate 1 is folded along the folding line 103, the back side of the first base portion 101 is attached to the back side of the second base portion 102, and the part of the negative tab of the first battery 201 located on the back side of the flexible substrate 1 can be in contact with the part of the negative tab of the second battery 202 located on the back side of the flexible substrate 1. Since the positive tab of the first battery 201 has been connected to the positive tab of the second battery 202 through the conductive bridge layer 7, the first battery 201 and the second battery 202 will be connected in parallel at this time.

[0070] Among them, the conductive bridge layer 7 can adopt any solid or liquid conductive medium, such as a conductive sheet, an electrolyte, etc., which is not limited here. The orientation of the conductive bridge layer 7 is not limited to Figure 7 the straight line form shown, and can also be set in a form with corners as shown in Figure 8 , so as to be used to connect two second target tabs 4 that are not symmetrically arranged with respect to the folding line 103, thereby improving the applicability.

[0071] Optionally, referring to Figure 9 , a first cutting line 8 is provided around the second target tab 4 of the first battery 201, and a second cutting line 9 is provided around the second target tab 4 of the second battery 202; when the flexible substrate 1 is folded along the folding line 103, the second target tab 4 of the first battery 201 is used to connect with the second target tab 4 of the second battery 202.

[0072] In this embodiment, by providing a first cutting line 8 on the flexible substrate 1, the area within the first cutting line 8 can form a foldable substrate portion, that is, the second target tab 4 of the first battery 201 can be made into a foldable form; similarly, by providing a second cutting line 9 on the flexible substrate 1, the area within the second cutting line 9 can form a foldable substrate portion, that is, the second target tab 4 of the second battery 202 can be made into a foldable form. Based on this structural form, the orientation of the second target tab 4 can be flexibly adjusted through a folding operation. Even if the second target tab 4 is only provided on one side of the flexible substrate 1, it can be folded to the other side of the flexible substrate 1 according to the connection needs, thus making it more convenient to connect the second target tabs 4 to each other.

[0073] Specifically, taking Figure 9 as an example, the negative tabs of the first battery 201 and the negative tabs of the second battery 202 serve as the first target tabs 3 and penetrate through the front and back sides of the flexible substrate 1, and the positive tabs of the first battery 201 and the positive tabs of the second battery 202 serve as the second target tabs 4 and are provided on the front side of the flexible substrate 1; and since a first cutting line 8 is provided around the positive tab of the first battery 201 and a second cutting line 9 is provided around the positive tab of the second battery 202, the positive tabs of the first battery 201 and the positive tabs of the second battery 202 can be folded to the back side of the flexible substrate 1; thus, when the flexible substrate 1 is folded along the folding line 103, the positive tabs of the first battery 201 and the positive tabs of the second battery 202 can contact each other, and the negative tabs of the first battery 201 and the negative tabs of the second battery 202 can also contact each other to achieve parallel connection.

[0074] Optionally, referring to Figure 10 , a third cutting line 10 is provided around the second target tab 4 of the first battery 201, and a connection window 11 is opened in the second base portion 102, and the connection window 11 is adjacent to the second target tab 4 of the second battery 202; when the flexible substrate 1 is folded along the folding line 103, the second target tab 4 of the first battery 201 is used to pass through the connection window 11 and connect to the second target tab 4 of the second battery 202.

[0075] Referring to the specific implementation manner of the previous embodiment, in this embodiment, only a third cutting line 10 is provided around the second target tab 4 of the first battery 201 so that the second target tab 4 of the first battery 201 can be folded, and no cutting line is provided around the second target tab 4 of the second battery 202, but instead a connection window 11 is opened near the second target tab 4 of the second battery 202; thus, the second target tab 4 of the first battery 201 can pass through the connection window 11 after being folded and reach the area where the second target tab 4 of the second battery 202 is located, thereby also realizing the connection between the two second target tabs 4.

[0076] Specifically, takingFigure 10 Taking the shown as an example, the negative electrode tabs of the first battery 201 and the negative electrode tabs of the second battery 202 serve as the first target electrode tabs 3 and penetrate through the front and back sides of the flexible substrate 1. The positive electrode tabs of the first battery 201 and the positive electrode tabs of the second battery 202 serve as the second target electrode tabs 4 and are arranged on the front side of the flexible substrate 1. When the flexible substrate 1 is folded along the folding line 103, the positive electrode tab of the first battery 201 can be folded according to the position of the connection window 11, so that the positive electrode tab of the first battery 201 passes through the connection window 11 and reaches the second base portion 102, thereby realizing the connection between the positive electrode tab of the first battery 201 and the positive electrode tab of the second battery 202. It should be noted that the positive electrode tab of the first battery 201 can be extended as needed to ensure that it has sufficient length for the folding operation.

[0077] Optionally, referring to Figure 11 , the number of the single cells 2 is at least four. A folding line 103 is provided between each adjacent pair of single cells 2, and the folding directions corresponding to two adjacent folding lines 103 are opposite. The first target electrode tabs 3 and the second target electrode tabs 4 of each adjacent pair of single cells 2 are symmetrically arranged with respect to the corresponding folding line 103.

[0078] For the convenience of understanding, taking the four single cells 2 shown in Figure 11 as an example, the specific implementation manner of this embodiment is described as follows:

[0079] The flexible substrate 1 is laid flat in the initial state. The positive electrode tab, the negative electrode tab of the second single cell 2 from the left, the positive electrode tab, and the negative electrode tab of the third single cell 2 from the left all penetrate through the front and back sides of the flexible substrate 1, and the remaining electrode tabs are arranged on the front side of the flexible substrate 1. A total of three folding lines 103 are provided on the flexible substrate 1, and the folding directions corresponding to the folding lines 103 on both sides are opposite to the folding direction corresponding to the middle folding line 103. The electrode tabs on each adjacent pair of single cells 2 are symmetrically arranged with respect to the corresponding folding line 103. Based on the above settings, when the flexible substrate 1 is folded along the three folding lines 103 in the corresponding folding directions respectively, the parts of the positive electrode tab and the negative electrode tab of the first single cell 2 from the left located on the front side of the flexible substrate 1 will respectively contact the parts of the positive electrode tab and the negative electrode tab of the second single cell 2 from the left located on the front side of the flexible substrate 1. The parts of the positive electrode tab and the negative electrode tab of the second single cell 2 from the left located on the back side of the flexible substrate 1 will respectively contact the parts of the positive electrode tab and the negative electrode tab of the third single cell 2 from the left located on the back side of the flexible substrate 1. The parts of the positive electrode tab and the negative electrode tab of the third single cell 2 from the left located on the front side of the flexible substrate 1 will respectively contact the parts of the positive electrode tab and the negative electrode tab of the fourth single cell 2 from the left located on the front side of the flexible substrate 1. In this way, the parallel connection between the four single cells 2 is realized.

[0080] Further, in this embodiment, a first folding line 104 and a second folding line 105 are further provided on the flexible substrate 1. As Figure 11 shown, the first folding line 104 is provided at the left end of the flexible substrate 1 and divides the flexible substrate 1 into two parts. The first folding line 104 sequentially passes through the positive electrode tab and the negative electrode tab of the first monomer battery 2 from top to bottom starting from the left. The second folding line 105 is provided at the right end of the flexible substrate 1 and divides the flexible substrate 1 into two parts. The second folding line 105 sequentially passes through the positive electrode tab and the negative electrode tab of the fourth monomer battery 2 from top to bottom starting from the left. Based on this setting, after the flexible substrate 1 is folded along the three folding lines 103, the positive electrode tab and the negative electrode tab of the first monomer battery 2 starting from the left will block the positive electrode tab and the negative electrode tab of the second monomer battery 2 starting from the left, and the positive electrode tab and the negative electrode tab of the fourth monomer battery 2 starting from the left will block the positive electrode tab and the negative electrode tab of the third monomer battery 2 starting from the left. At this time, the flexible substrate 1 can be turned outwards along the first folding line 104, so that a part of the positive and negative electrode tabs of the first monomer battery 2 starting from the left is turned to a position where it does not block the positive and negative electrode tabs of the second monomer battery 2 starting from the left. Similarly, the flexible substrate 1 can be turned outwards along the second folding line 105, so that a part of the positive and negative electrode tabs of the fourth monomer battery 2 starting from the left is turned to a position where it does not block the positive and negative electrode tabs of the third monomer battery 2 starting from the left. Based on the above operations, the positive electrode tab and the negative electrode tab of the second monomer battery 2 starting from the left and the positive electrode tab and the negative electrode tab of the third monomer battery 2 starting from the left can be exposed, which is more convenient for performing electrical connection operations and other operations to achieve the corresponding usage purposes.

[0081] For the case where the number of monomer batteries 2 is set to more than four, the above-described embodiment can be similarly set, so as to realize the parallel connection of multiple monomer batteries 2 through folding operations and avoid blocking the corresponding electrode tabs through turning operations, which will not be elaborated here.

[0082] Optionally, referring to Figures 1 to 11 , a serrated structure (not shown in the figure) is provided on the surface of at least one first target electrode tab 3 and / or the surface of at least one second target electrode tab 4. When the two electrode tabs come into contact with each other after the flexible substrate 1 is folded, through the biting action between the serrated structures on the surfaces of the electrode tabs, the connection stability between the electrode tabs can be increased, and the internal resistance can be reduced and the operation stability of the flexible foldable parallel battery pack can be improved accordingly.

[0083] Optionally, referring to Figures 1 to 11 , the folding line 103 is set as an easy-to-tear line; thus, when any monomer battery 2 needs to be used alone, the operator can easily tear the flexible substrate 1 along the folding line 103, so that the monomer battery 2 can be quickly separated from the flexible substrate 1 without the aid of other tools.

[0084] Optionally, referring to Figure 12, an adhesive layer 12 is provided on the surface of the flexible substrate 1; wherein, the adhesive layer 12 can be an adhesive layer with adhesiveness or other adhesive materials, and the adhesive layer 12 can be arranged on the front, back or other positions of the flexible substrate 1 as needed.

[0085] By providing the adhesive layer 12, 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, making the connection between the corresponding tab ears closer, and enabling the flexible folded parallel battery pack to stably maintain the folded state, thereby improving the structural and operational stability of the flexible folded parallel 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 the external devices in a convenient and easy-to-operate manner, and broadening its scope of use.

[0086] Please refer to Figures 1 to 12 , the present utility model also proposes an electrical device, including the flexible folded parallel battery pack in any of the above embodiments.

[0087] In this embodiment, the electrical device includes devices that need to be driven by electric energy, such as wearable devices and terminal devices. The flexible folded parallel battery pack can output the stored electric energy to the electrical device through the connection between the corresponding tab ears and the external battery contact end of the electrical device to realize the power supply operation of the electrical device. For the specific structure of the flexible folded parallel 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 at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0088] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present utility model.

Claims

1. A flexible folding parallel battery pack, characterized in that, Comprising: A flexible substrate; At least two single cells, linearly arranged on the flexible substrate; At least one set of folding lines are provided between two adjacent ones of the single cells; At least two adjacent single cells have a first target tab with the same polarity and a second target tab with the same polarity. The first target tab penetrates the front and back of the flexible substrate, and the second target tabs are electrically connected to each other; the first target tabs of at least two adjacent single cells are used to contact each other after the flexible substrate is folded along the corresponding folding line to achieve electrical connection.

2. The flexible folding parallel battery pack according to claim 1, wherein The second target tab penetrates the front and back of the flexible substrate, and the second target tabs of at least two adjacent single cells are used to contact each other after the flexible substrate is folded along the corresponding folding line.

3. The flexible folding parallel battery pack according to claim 2, wherein A first tab extension layer is provided on the back of the flexible substrate, and the first tab extension layer is connected to the first target tabs of two parallel single cells; And / or, a second tab extension layer is provided on the back of the flexible substrate, and the second tab extension layer is connected to the second target tabs of two parallel single cells.

4. The flexible folding parallel battery pack according to claim 2, wherein, The folding line divides the flexible substrate into a first base portion and a second base portion; taking two adjacent and parallel single cells as a first cell and a second cell respectively, the first cell is located in the first base portion, and the second cell is located in the second base portion; The first target tab of the first cell extends to the edge of the first base portion; When the flexible substrate is folded along the folding line, the first target tab of the second cell is within the orthographic projection range of the first target tab of the first cell; And / or, the second target tab of the first cell extends to the edge of the first base portion; When the flexible substrate is folded along the folding line, the second target tab of the second cell is within the orthographic projection range of the second target tab of the first cell.

5. The flexible folding parallel battery pack according to claim 1, characterized in that, A conductive bridge layer is provided on the flexible substrate, and the second target tabs are connected through the conductive bridge layer.

6. The flexible folding parallel battery pack according to claim 1, wherein, The folding line divides the flexible substrate into a first base portion and a second base portion; taking two adjacent and parallel single cells as a first cell and a second cell respectively, the first cell is located in the first base portion, and the second cell is located in the second base portion; A first cutting line is provided around the second target tab of the first cell, and a second cutting line is provided around the second target tab of the second cell; when the flexible substrate is folded along the folding line, the second target tab of the first cell is used to connect with the second target tab of the second cell; Or, a third cutting line is provided around the second target tab of the first cell, and a connection window is formed in the second base portion, and the connection window is adjacent to the second target tab of the second cell; when the flexible substrate is folded along the folding line, the second target tab of the first cell is used to pass through the connection window and connect with the second target tab of the second cell.

7. The flexible folding parallel battery pack according to claim 1, wherein, The number of the single cells is at least four, and the folding lines are provided between every two adjacent single cells. The folding directions corresponding to two adjacent folding lines are opposite; the first target tab and the second target tab of every two adjacent single cells are symmetrically arranged with respect to the corresponding folding line.

8. The flexible folding parallel battery pack according to claim 7, wherein, The number of the single cells is four. The first target tab and the second target tab of the two single cells located in the middle of the flexible substrate penetrate through the front and back surfaces of the flexible substrate, and the first target tab and the second target tab of the two single cells located at both ends of the flexible substrate are arranged on the front surface of the flexible substrate. The flexible substrate is further provided with a first folding line and a second folding line. The first folding line passes through the first target tab and the second target tab of the single cell at one end of the flexible substrate, and the second folding line passes through the first target tab and the second target tab of the single cell at the other end of the flexible substrate.

9. The flexible folding parallel battery pack according to any one of claims 1 to 8, wherein, The surface of at least one of the first target tabs and / or the surface of at least one of the second target tabs is provided with a serrated structure. And / or, the folding line is set as an easy tear line. And / or, the surface of the flexible substrate is provided with an adhesive layer.

10. An electrical appliance, characterized in that, It includes a flexible folding parallel battery pack according to any one of claims 1 to 9.

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