A novel polymer battery, battery module and battery system

Abstract

The utility model discloses a novel polymer battery and battery module and battery system. Novel polymer electric package polymer electric core, the top of polymer electric core sets up the top front edge portion of electric core, the top of polymer electric core is the remaining portion except the top front edge portion of electric core as the bottom surface of the front edge of electric core, the one side of the top front edge portion of electric core is the side surface of the front edge of electric core, the first conductive sheet and the second conductive sheet of protection board subassembly including respectively correspond with the positive pole lug of electric core and the negative pole lug of electric core electricity is connected, sets up protection board subassembly above the bottom surface of the front edge of battery and sets up the composite adhesive tape component for separating between the bottom surface of the front edge of electric core and the side surface of the front edge of electric core and protection board subassembly. The utility model can separate protection board and polymer electric core completely, makes the pole lug of electric core and protection board subassembly insulation, avoids internal short circuit, effectively reduces heat transfer, enhances the heat dissipation efficiency. In addition, firmly fix protection board in the head of electric core, reduce the risk of protection board impact electric core body when battery is doing safety test, improve the safety performance of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a novel polymer battery, battery module, and battery system. Background Technology

[0002] With the increasing prevalence of electronic devices such as smartphones, smart bracelets, smartwatches, and graphing calculators, consumers are demanding higher battery safety while also prioritizing lower battery costs. Therefore, combining the advantages of high safety with low cost has become particularly important.

[0003] However, traditional polymer batteries often have an unreasonable structural design, making it impossible to completely separate the protection board from the polymer cell. There are areas of direct contact between the polymer cell and the protection board, and this direct heat transfer exacerbates the risk of localized high temperatures. Especially during fast charging or high-load use, the inability to dissipate heat in time can lead to cell performance degradation or damage, affecting battery safety.

[0004] In addition, the protective plate at the top of the cell (i.e., above the cell) is not securely fixed to the top of the cell, which means that the protective plate may impact the cell body when the battery is being tested for safety (such as drop test).

[0005] Therefore, there is an urgent need to develop a technology that can solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to address the technical deficiencies of existing technologies by providing a novel polymer battery, battery module, and battery system.

[0007] Therefore, this utility model provides a novel polymer battery, including a composite tape assembly, a polymer cell, and a protection board; The polymer battery cell includes a positive electrode tab, a negative electrode tab, and a top leading edge portion of the battery cell. The top end of the polymer cell has an upward-protruding leading edge portion. The positive and negative tabs of the polymer battery cell are located on the top leading edge of the cell, respectively. The top part of a polymer cell, excluding the leading edge of the cell, is the bottom surface of the leading edge. The side of the top leading edge of the battery cell facing the bottom surface of the battery's leading edge is the side surface of the leading edge of the battery cell; The protection board assembly includes a circuit board, a first conductive sheet, and a second conductive sheet; The first and second conductive plates on the circuit board are electrically connected to the positive and negative tabs of the battery cell, respectively. Among them, a protection plate assembly is provided above the bottom surface of the leading edge of the battery, and a composite tape assembly is provided between the bottom surface of the leading edge of the battery cell and the side surface of the leading edge of the battery cell and the protection plate assembly; Composite tape assemblies are used to separate the bottom and sides of the leading edge of the battery cell from the protection plate assembly.

[0008] In addition, this utility model also provides a battery module, which includes a plurality of novel polymer batteries as described above; Multiple novel polymer batteries are connected in parallel, series, or series-parallel configurations.

[0009] In addition, this utility model also provides a battery system, characterized in that it includes at least one battery module as described above.

[0010] As can be seen from the technical solution provided by this utility model above, compared with the prior art, this utility model provides a novel polymer battery, battery module and battery system. Its structure is scientifically designed, which can completely separate the protection board from the polymer cell, insulate the cell tabs from the protection board assembly, avoid internal short circuits, effectively reduce heat transfer, enhance heat dissipation efficiency and extend battery life, and help improve the safety performance of the battery, which has great practical significance.

[0011] In addition, by adopting the technical solution of this utility model, the protection board is firmly fixed to the head of the battery cell, reducing the risk of the protection board hitting the battery cell body when the battery is being tested for safety.

[0012] Furthermore, the polymer battery of this utility model adopts an assembly structure of: polymer cell + protection board + composite tape. The positioning and pasting process of the composite tape can be completed in one step, which is quick and convenient, improves production efficiency, reduces labor costs, and enhances the competitive advantage of battery products. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of a novel polymer battery provided by this utility model; Figure 2 A schematic diagram of the planar structure of the composite tape assembly in the novel polymer battery provided by this utility model; Figure 3 A cross-sectional schematic diagram of the composite tape assembly in the novel polymer battery provided by this utility model; Figure 4 A schematic diagram of the planar structure of the composite tape assembly in the novel polymer battery provided by this utility model during positioning; Figure 5 A schematic diagram of the planar structure of the backing paper (i.e., base film) of the composite tape assembly in the novel polymer battery provided by this utility model when completely torn off; Figure 6 A schematic diagram of the planar structure of the composite tape assembly in the novel polymer battery provided by this utility model when the release film is removed; Figure 7 A three-dimensional structural diagram of a polymer cell in a novel polymer battery provided by this utility model, showing the polymer cell with its tabs bent. Figure 8 A three-dimensional structural diagram of a protection board assembly in a novel polymer battery provided by this utility model; Figure 9 A three-dimensional structural diagram of the composite tape assembly in a novel polymer battery provided by this utility model after use (i.e., in a fully assembled polymer battery). Figure 10 This is a schematic diagram showing the state of the protection board assembly and the polymer cell after electrical connection is completed during the assembly of a novel polymer battery provided by this utility model. Figure 11 This is a schematic cross-sectional view of the top portion of a novel polymer battery after assembly, as provided by this utility model. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] See Figures 1 to 11 This utility model provides a novel polymer battery, including a composite tape assembly 10, a polymer cell 20, and a protection board assembly 30. The polymer cell 20 includes a positive electrode tab 21, a negative electrode tab 22, and a top leading edge portion 201. At one top end of the polymer cell 20, a top leading edge portion 201 is provided protruding upward; The polymer cell 20 has a positive electrode tab 21 and a negative electrode tab 22 located on the top leading edge portion 201 of the cell, respectively; The top part of the polymer cell 20, excluding the leading edge 201 of the top of the cell, is the bottom surface 23 of the leading edge of the cell; The side of the top leading edge 201 of the cell facing the bottom surface 23 of the battery leading edge is the side surface 24 of the cell leading edge; The protection board assembly 30 includes a circuit board 31, a first conductive sheet 32, and a second conductive sheet 33. The first conductive sheet 32 ​​and the second conductive sheet 33 disposed on the circuit board 31 are electrically connected to the positive electrode tab 21 and the negative electrode tab 22 of the battery cell, respectively. Among them, a protection plate assembly 30 is provided above the bottom surface 23 of the front edge of the battery, and a composite tape assembly 10 is provided between the bottom surface 23 of the front edge of the battery cell and the side surface 24 of the front edge of the battery cell and the protection plate assembly 30. The composite tape assembly 10 is used to separate the bottom surface 23 and the side surface 24 of the leading edge of the battery cell from the protection plate assembly 30 (specifically, to completely separate them).

[0019] It should be noted that, in this utility model, the bottom surface 23 and the side surface 24 of the leading edge of the polymer cell 20 are isolated and protected from the protection plate assembly 30 by the composite tape assembly 10. That is, the protection plate assembly 30 and the polymer cell 20 are completely separated, thereby effectively reducing the heat transfer between the polymer cell and the protection plate, and enhancing the heat dissipation efficiency through reasonable spacing, thus significantly improving the safety of the battery.

[0020] In this invention, specifically, the first conductive sheet 32 ​​and the second conductive sheet 33 are respectively the positive electrode conductive sheet and the negative electrode conductive sheet.

[0021] It should be noted that the protection board assembly 30 is a conventional battery protection board in the existing battery technology field. It is a component for batteries with mature existing technology and will not be described in detail here.

[0022] In this utility model, for specific implementation, see [link to relevant documentation]. Figures 2 to 3 Before the assembly of the polymer battery is carried out, the initial composite tape assembly 10 includes a base film 11, a wrapping tape 12, a release film 13, and a double-sided adhesive 14. A wrapping tape 12 (not limited to the shape and size of the wrapping tape shown in the figure) is provided on the upper surface of the base film 11. Double-sided adhesive 14 (not limited to the position, shape and size of the double-sided adhesive shown in the figure) is provided on the upper surface of the wrapping tape 12. A release film 13 (not limited to the shape and size of the release film shown in the figure) is provided on the upper surface of the double-sided adhesive 14. In practice, the shape of the wrapping tape 12 is preferably rectangular.

[0023] In practice, double-sided adhesive tape 14 is provided on one end of the upper surface of the wrapping tape 12 along the long side of the base film 11.

[0024] In practice, the base film 11 is provided with a back tangent line 114 and two positioning holes 113; The two positioning holes 113 are located on the same side of the back tangent 114 (e.g., both on the right side). The base film 11 is divided by the back tangent line 114. The area on the side without the positioning hole 113 is the first region 111 of the base film, and the area on the other side with the positioning hole 113 is the second region 112 of the base film (not limited to the position of the back tangent line and the size of the positioning hole shown in the figure, nor limited to the shape and size of the base film 11 shown in the figure). Furthermore, the back tangent 114 is distributed along the long side of the base film 11; Furthermore, the two positioning holes 113 are symmetrically distributed; Furthermore, the back tangent 114 includes a plurality of through holes that are distributed sequentially at equal intervals, and the center points of the plurality of through holes are located on the same longitudinal axis, with each through hole penetrating the base film 11.

[0025] It should be noted that the design of the back tangent 114 must make the first region 111 of the base film easy to tear off during operation.

[0026] For specific implementation details, see [link to implementation details]. Figure 4 The wrapping tape 12 is a single-sided adhesive tape; With the back tangent line 114 of the base film 11 as the dividing line, the area on one side of the back tangent line of the wrapping tape 12 is the first wrapping tape area 121, and the area on the other side is the second wrapping tape area 122. The first area 121 of the wrapping tape is used to attach it to the front edge side 24 of the polymer cell 20; In practice, the peel strength between the double-sided adhesive 14 and the wrapping tape 12 is greater than (specifically, it must be much greater than) the peel strength between the double-sided adhesive 14 and the release film 13, so that the double-sided adhesive 14 will not be peeled off from the wrapping tape 12 when the release film 13 is torn off. For example, the peel strength between the double-sided adhesive 14 and the wrapping tape 12 is more than four times the peel strength between the double-sided adhesive 14 and the release film 13.

[0027] In practice, the release film 13 covers the upper surface of the double-sided adhesive 14; In practice, the length of the release film 13 is greater than the length of the double-sided adhesive 14, and the width of the release film 13 is equal to the width of the double-sided adhesive 14. In terms of specific implementation, as shown in Figure 5, the release film 13 includes a tear-off area 131 and a non-tear-off area 132; The non-tearable area 132 completely covers the upper surface of the double-sided tape 14; The tear-off area 131 is located outside the double-sided tape 14 and is connected to the non-tear-off area 132.

[0028] Furthermore, the tearing area 131 and the non-tearing area 132 are integrally formed.

[0029] Furthermore, the length of the non-tearable area 132 is equal to the length of the double-sided tape 14, and its width is also equal to the width of the double-sided tape 14. Furthermore, the length of the tear-off area 131 is less than the length of the double-sided tape 14, and a portion of its width is also equal to the width of the double-sided tape 14. Furthermore, the tearing area 131 includes rectangular portions and semi-circular portions that are connected together; The horizontal width of the rectangular part is equal to the horizontal width of the double-sided tape 14, and the horizontal width of the semi-circular part is less than the horizontal width of the double-sided tape 14.

[0030] It should be noted that the reason for designing the tear-off area 131 is to facilitate the staff to peel off the release film 13 more quickly during the operation. In this utility model, for specific implementation, see [link to relevant documentation]. Figure 9 , Figure 10 After the polymer battery assembly is completed, the composite tape assembly 10 includes wrapping tape 12 and double-sided adhesive tape 14. Double-sided adhesive 14 is provided on the surface of the wrapping tape 12; The wrapping tape 12 is specifically used to separate the bottom surface 23 and the side surface 24 of the leading edge of the battery cell from the protection board assembly 30; For specific implementation details, see [link to implementation details]. Figure 10 One side of the double-sided tape 14 is attached to the wrapping tape 12, and the other side is also attached to the wrapping tape 12 (specifically, a part of the bent wrapping tape 12), which helps to fix the protection board assembly 30 to the head of the battery cell.

[0031] To better understand the technical solution of this utility model, the assembly process of this utility model is described below.

[0032] First, the workers electrically connect the first conductive plate 32 and the second conductive plate 33 on the protection board assembly 30 to the positive electrode tab 21 and the negative electrode tab 22 of the polymer battery cell 20, respectively. The state of the protection board assembly 30 after electrical connection with the polymer battery cell 20 is as follows. Figure 10 As shown; Then, bend the protective plate assembly 30 backward by 90°, then peel off the base film first area 111 in the base film 11 of the composite tape assembly 10, and stick the wrapping tape first area 121 of the wrapping tape 12 onto the front edge side 24 of the cell (e.g., by conventional tooling fixtures). Then, the staff gently presses the first area 121 of the wrapping tape with their hands, and then pulls the tear-hand area 131 of the release film 13 to tear off the release film 13. Then, the first conductive sheet 32 ​​and the second conductive sheet 33 are simultaneously bent forward by 90°, and then folded vertically in the opposite direction by 90°. The protective plate assembly 30 is firmly attached to the front edge of the battery using double-sided tape 14 and wrapping tape 12. Then, the second area 112 of the base film 11 is peeled off, and the second area 122 of the wrapping tape is bent backward and attached to the head of the polymer cell 20. Finally, the protective plate assembly 30 is firmly attached to the front edge side 24 of the polymer cell 20, thus achieving the desired effect. Figure 11 The illustrated effect.

[0033] It should be noted that the second area 122 of the wrapping tape is attached to the bottom surface 23 of the front edge of the polymer cell 20, and then the first conductive sheet 32 ​​and the second conductive sheet 33 are bent (so that the bent positive electrode 21 and negative electrode 22 of the cell cover the top front edge 201 of the cell respectively), and the bottom surface 23 of the front edge of the polymer cell 20 is isolated from the protection plate assembly 30 (which is connected to the positive electrode 21 and negative electrode 22 of the cell) by the second area 122 of the wrapping tape.

[0034] In practice, the thickness of the wrapping tape 12 is 0.05mm, the adhesive strength is at least 6N / 25mm, and the common materials are PET / PI or other available materials; In practice, the thickness of the double-sided tape 14 is between 0.05 and 0.15 mm, and the adhesion strength is at least 11 N / 25 mm. It should be noted that this utility model adopts the design of a composite tape assembly 10 for polymer batteries, which can complete the positioning and pasting process of the tape in one step. This operation is fast and convenient, improves production efficiency, reduces labor costs, enhances competitive advantage, and is conducive to the safe application of more electronic portable mobile devices, and has broad market application prospects.

[0035] Based on the novel polymer battery provided by the present invention, the present invention also provides a battery module, which includes a plurality of novel polymer batteries as described above. Multiple novel polymer batteries are connected in parallel, series, or series-parallel (i.e., a combination of series and parallel connections).

[0036] It should be noted that the specific methods for connecting multiple polymer batteries (i.e., individual cells) in series, parallel, or series-parallel configurations for battery modules are conventional and well-known technologies in the existing battery technology field, and will not be elaborated here.

[0037] Based on the battery module provided by the present invention, the present invention also provides a battery system, which includes at least one battery module as described above.

[0038] In specific implementation, when the battery system includes multiple battery modules, the multiple battery modules are connected in parallel, in series, or in a series-parallel connection.

[0039] It should be noted that the specific methods for connecting multiple battery modules in series, parallel, or in a series-parallel configuration are common and well-known techniques in the existing battery technology field, and will not be elaborated here.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel polymer battery, characterized by, It includes a composite tape assembly (10), a polymer battery cell (20), and a protection board assembly (30). Among them, the polymer cell (20) includes a positive electrode tab (21), a negative electrode tab (22), and a top leading edge portion (201). One end of the polymer cell (20) is provided with a top leading edge portion (201) that protrudes upward. The polymer cell (20) has a positive electrode tab (21) and a negative electrode tab (22) located on the top leading edge (201) of the cell; The remaining part of the top of the polymer cell (20), except for the leading edge of the cell (201), is the bottom surface of the leading edge of the cell (23). The side of the top leading edge (201) of the cell facing the bottom surface (23) of the battery leading edge is the side surface (24) of the cell leading edge. The protection board assembly (30) includes a circuit board (31), a first conductive sheet (32), and a second conductive sheet (33). The first conductive sheet (32) and the second conductive sheet (33) provided on the circuit board (31) are electrically connected to the positive electrode tab (21) and the negative electrode tab (22) of the battery cell, respectively. Among them, a protection plate assembly (30) is provided above the bottom surface (23) of the front edge of the battery, and a composite tape assembly (10) is provided between the bottom surface (23) of the front edge of the battery cell and the side surface (24) of the front edge of the battery cell and the protection plate assembly (30). The composite tape assembly (10) is used to separate the bottom surface (23) and the side surface (24) of the leading edge of the cell from the protection plate assembly (30).

2. The novel polymer battery as claimed in claim 1, wherein, Before the assembly of the polymer battery is carried out, the composite tape assembly (10) includes a base film (11), a wrapping tape (12), a release film (13) and double-sided adhesive (14). The upper surface of the base film (11) is provided with wrapping tape (12); Double-sided adhesive (14) is provided on the upper surface of the wrapping tape (12); A release film (13) is provided on the upper surface of the double-sided adhesive (14).

3. The novel polymer battery as claimed in claim 2, wherein, Double-sided adhesive (14) is provided on one end of the upper surface of the wrapping tape (12) along the long side of the base film (11). The base film (11) is provided with a back tangent line (114) and two positioning holes (113). The two positioning holes (113) are located on the same side of the back tangent (114); The base membrane (11) is divided by the back tangent (114). The area on the side without the positioning hole (113) is the first region (111) of the base membrane, and the area on the other side with the positioning hole (113) is the second region (112) of the base membrane.

4. The novel polymer battery as described in claim 3, characterized in that, The back tangent (114) is distributed along the long side of the base film (11); The two positioning holes (113) are symmetrically distributed.

5. The novel polymer battery as described in claim 3, characterized in that, The back tangent (114) includes multiple through holes that are distributed at equal intervals in sequence, and the center points of the multiple through holes are located on the same longitudinal axis. Each through hole penetrates the base film (11).

6. The novel polymer battery as described in claim 3, characterized in that, The wrapping tape (12) is a single-sided adhesive tape; Using the back tangent line (114) of the base film (11) as the dividing line, the area on one side of the wrapping tape (12) is the first wrapping tape area (121), and the area on the other side is the second wrapping tape area (122). Wrapping tape in the first area (121) is used to attach it to the front edge side (24) of the polymer cell (20).

7. The novel polymer battery according to any one of claims 2 to 6, characterized in that, The peel strength between the double-sided adhesive (14) and the wrapping tape (12) is greater than the peel strength between the double-sided adhesive (14) and the release film (13); Release film (13) covers the upper surface of double-sided adhesive (14); The length of the release film (13) is greater than the length of the double-sided adhesive (14), and the width of the release film (13) is equal to the width of the double-sided adhesive (14); The release film (13) includes a tear-off area (131) and a non-tear-off area (132). The non-tearable area (132) completely covers the upper surface of the double-sided tape (14); The tear-off area (131) is located outside the double-sided tape (14) and is connected to the non-tear-off area (132); The tearing area (131) and the non-tearing area (132) are integrally formed.

8. The novel polymer battery as claimed in claim 1, wherein, The composite tape assembly (10) includes wrapping tape (12) and double-sided tape (14). Double-sided adhesive (14) is provided on the surface of the wrapping tape (12); Wrapping tape (12) is used to separate the bottom surface (23) and the side surface (24) of the leading edge of the cell from the protection board assembly (30).

9. A battery module, characterized in that, Includes multiple novel polymer batteries as described in any one of claims 1 to 8; Multiple novel polymer batteries are connected in parallel, series, or series-parallel configurations.

10. A battery system characterized by, It includes at least one battery module as described in claim 9.

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