Protective plate for three-tab battery and three-tab battery

Abstract

The utility model relates to the technical field of batteries, and discloses a protection plate for a three-tab battery and the three-tab battery, the protection plate comprises a rigid circuit board, a first flexible circuit board and a second flexible circuit board, the first flexible circuit board and the second flexible circuit board are respectively integrated with two opposite ends of the rigid circuit board; the two opposite ends of the lower surface of the rigid circuit board are provided with a first tab bonding pad and a second tab bonding pad respectively, a third tab bonding pad is arranged between the first tab bonding pad and the second tab bonding pad, and a first piece distribution area is arranged between every two adjacent tab bonding pads. The position, opposite to the first piece distribution area, of the upper surface of the rigid circuit board is provided with a second piece distribution area. According to the protection plate provided by the utility model, the two flexible circuit boards and the two opposite ends of the rigid circuit board are integrally formed, so that the positions of the tab pads and the distribution area on the rigid circuit board are optimized, the distribution space of electronic elements of the protection plate is optimized, compact layout is realized, and the problem of layout of the protection plate is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a protection plate for a three-electrode battery and the three-electrode battery. Background Art

[0002] In the current mobile phone industry, battery manufacturing technology plays a key role in mobile phone performance. Most mobile phones use a bipolar tab injection molding process. However, bipolar tab batteries have significant drawbacks. For example, bipolar tab batteries lead to higher internal resistance, resulting in significant energy loss when current flows through the battery, affecting the battery's charge and discharge efficiency. Bipolar tab batteries also have low current capacity, which limits the performance of mobile phones under high-power operation. For example, during fast charging, the ideal charging speed may not be achieved, and power shortages may occur when running power-intensive applications such as large-scale games.

[0003] To address these issues, tri-electrode batteries were developed. They effectively reduce the battery's internal resistance and significantly improve current handling, resulting in superior battery life and performance for mobile phones. For example, under the same charging conditions, phones using tri-electrode batteries can achieve faster charging speeds and maintain more stable power supply with less lag when running high-load applications.

[0004] However, due to the particularity of the tri-pole battery cell structure, the traditional bi-pole battery cell adopts a soft board welding hard board design. The welding position of the soft board of the bi-pole battery cell will occupy the space for component layout on the hard board. If the tri-pole battery cell continues to use the soft board welding hard board design, there will be insufficient space for component layout, affecting the widespread application of tri-pole battery cells in mobile phones. Utility Model Content

[0005] In order to solve the problems in the above-mentioned prior art where a three-pole battery cell adopts a soft board welded to a hard board design of a two-pole battery cell, resulting in insufficient space for component layout and inability to complete component layout, the embodiments of the present invention provide a protective plate for a three-pole battery and a three-pole battery.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical solutions:

[0007] The utility model provides a kind of protection plate for tri-electrode ear battery, comprising: rigid circuit board, first flexible circuit board and second flexible circuit board, first flexible circuit board and second flexible circuit board are integrally formed with the opposite ends of rigid circuit board respectively;The opposite ends of the lower surface of rigid circuit board are respectively provided with first lug pad and second lug pad, and the third lug pad is provided between first lug pad and second lug pad, and the first lug pad and the third lug pad between the lower surface of rigid circuit board and the second lug pad and the third lug pad are set as first cloth piece area, and the upper surface of rigid circuit board and the opposite position of first cloth piece area are set as second cloth piece area.

[0008] In some optional implementation modes, the first flexible circuit board includes a first connection section, a first bending section and a second connection section connected in sequence, the first connection section and the second connection section are arranged in parallel, the end of the second connection section away from the first bending section is integrally formed with the end of the rigid circuit board, and the first connection section and the upper surface of the rigid circuit board form a first cloth-prohibited area;

[0009] And / or, the second flexible circuit board includes a third connection section, a second bending section and a fourth connection section connected in sequence, the third connection section and the fourth connection section are arranged in parallel, the end of the fourth connection section away from the second bending section is integrally formed with the end of the rigid circuit board, and the third connection section and the upper surface of the rigid circuit board form a second cloth-prohibited area.

[0010] In some optional implementation modes, the first cloth-prohibited area is arranged opposite to the first lug pad, and the second cloth-prohibited area is arranged opposite to the second lug pad.

[0011] In some optional implementation modes, the upper surface of the rigid circuit board and the opposite position of the third lug pad are set as a third cloth-prohibited area.

[0012] In some optional implementation modes, the first flexible circuit board further includes a first flexible circuit board connector, and the first flexible circuit board connector is arranged at one end of the first connection section away from the first bending section.

[0013] And / or, the second flexible circuit board further includes a second flexible circuit board connector, and the second flexible circuit board connector is arranged at one end of the third connection section away from the second bending section.

[0014] In some optional implementation modes, the side wall of the rigid circuit board is provided with a glue groove, and the glue groove is arranged opposite to the first lug pad, the second lug pad and the third lug pad respectively.

[0015] The utility model provides a kind of three-pole lug battery, including electric core, injection glue structural member and above-mentioned protective plate, the top of electric core extends first pole lug, second pole lug and third pole lug, first pole lug, second pole lug and third pole lug are respectively welded with the first pole lug pad of protective plate, second pole lug pad and third pole lug pad;Injection glue structural member is covered in the top of electric core and covers the rigidity circuit board of first pole lug, second pole lug, third pole lug and protective plate.

[0016] In some optional implementation, the upper surface of the injection glue structural member is provided with a first recess and a second recess at opposite ends, respectively, the first flexible circuit board connector is located outside the injection glue structural member and at the first recess, and the second flexible circuit board connector is located outside the injection glue structural member and at the second recess.

[0017] In some optional implementation, the upper surface of the injection glue structural member is provided with a third recess and a fourth recess at ends away from the first recess and the second recess, respectively, the second connecting segment extends out of the injection glue structural member and is located in the third recess at an end close to the first bending segment, and the first bending segment is located outside the injection glue structural member and in the third recess; the fourth connecting segment extends out of the injection glue structural member and is located in the fourth recess at an end close to the second bending segment, and the second bending segment is located outside the injection glue structural member and in the fourth recess.

[0018] In some optional implementation, the first recess and the second recess are arranged opposite to the first pole lug pad and the second pole lug pad, respectively.

[0019] In summary, the utility model has at least the following advantages:

[0020] The protective plate for the three-pole lug battery is integrally formed with the opposite ends of the first flexible circuit board and the second flexible circuit board and the rigid circuit board, the positions of the pole lug pads and the layout area on the rigid circuit board are optimized, the layout space of the electronic components of the protective plate is optimized, compact layout is achieved, the layout problem of the protective plate is solved, the performance of the three-pole lug battery is improved, good connection is ensured, the advantages of the three-pole lug battery are brought into play, the battery life of the mobile phone is prolonged, the charging speed is improved, and the use stability is improved.

[0021] The above description is only a summary of the technical scheme of the utility model embodiment, in order to more clearly understand the technical means of the utility model embodiment, which can be implemented according to the content of the specification, and in order to let the above and other purposes, characteristics and advantages of the utility model embodiment can be more obvious and easy to understand, the specific implementation of the utility model is as follows. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1The utility model provides a side view of a protection plate for a three-pole lug battery.

[0023] Figure 2 The utility model provides a first angle structure schematic drawing of a protection plate for a three-pole lug battery.

[0024] Figure 3 The utility model provides a second angle structure schematic drawing of a protection plate for a three-pole lug battery.

[0025] Figure 4 The utility model provides a structure schematic drawing of a three-pole lug battery.

[0026] Figure 5 The utility model provides an explosion drawing of a three-pole lug battery.

[0027] Figure 6 The utility model provides a structure schematic drawing of the injection molding plastic structural member of a three-pole lug battery.

[0028] Figure 7 The utility model provides a packaging structure schematic drawing of the injection molding plastic structural member and the protection plate of a three-pole lug battery.

[0029] Figure 8 The utility model discloses a three-pole lug battery Figure 7 A-A section view.

[0030] Markings in the drawing:

[0031] 10, rigid circuit board;

[0032] 11, glue running groove;

[0033] 20, first flexible circuit board;

[0034] 21, first connecting section; 22, first bending section; 23, second connecting section; 24, first flexible circuit board connector;

[0035] 30, second flexible circuit board;

[0036] 31, third connecting section; 32, second bending section; 33, fourth connecting section; 34, second flexible circuit board connector;

[0037] 41, first pole lug pad; 42, second pole lug pad; 43, third pole lug pad;

[0038] 51, first cloth piece area; 52, second cloth piece area;

[0039] 61, first cloth piece area; 52, second cloth piece area;

[0040] 70, cell;

[0041] 71, first tab; 72, second tab; 73, third tab; 74, shell;

[0042] 741, main body part; 742, packaging part;

[0043] 80, injection molding plastic structure;

[0044] 81, first recessed part; 82, second recessed part; 83, third recessed part; 84, fourth recessed part. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0047] In order to solve the problems of insufficient element layout space and inability to complete the layout of the elements in the prior art three-tab cell using the soft plate welding hard plate design of the bipolar cell, the present application provides a protection plate for a three-tab battery.

[0048] Please refer to Figures 1-3 The protection plate for a three-tab battery disclosed in the embodiments of the present application comprises a rigid circuit board 10, a first flexible circuit board 20 and a second flexible circuit board 30, the first flexible circuit board 20 and the second flexible circuit board 30 are integrally formed with opposite ends of the rigid circuit board 10; the opposite ends of the lower surface of the rigid circuit board 10 are respectively provided with a first tab pad 41 and a second tab pad 42, a third tab pad 43 is arranged between the first tab pad 41 and the second tab pad 42, the first tab pad 41 and the third tab pad 43 and the second tab pad 42 and the third tab pad 43 are arranged as a first layout area 51 between the opposite ends of the lower surface of the rigid circuit board 10, and the upper surface of the rigid circuit board 10 and the opposite position of the first layout area 51 are arranged as a second layout area 52.

[0049] In the embodiment, the first flexible circuit board 20 and the second flexible circuit board 30 are integrally formed with the opposite ends of the rigid circuit board 10, thereby reducing the space occupied by the soft board welding position when the soft board welding hard board design is used for the bipolar lug battery, and when the three-pole lug design is used, the space occupied by the soft board welding position is designed as the lug pad, and the element layout space is further optimized.

[0050] Therefore, the protection plate for the three-pole lug battery provided in the embodiment optimizes the lug pad position and the layout area on the rigid circuit board 10 by integrally forming the first flexible circuit board 20 and the second flexible circuit board 30 with the opposite ends of the rigid circuit board 10, and arranging the first lug pad 41 and the second lug pad 42 on the lower surface of the rigid circuit board 10, and arranging the third lug pad 43 between the first lug pad 41 and the second lug pad 42. The protection plate for the three-pole lug battery of the embodiment optimizes the space utilization and realizes compact layout by reasonably arranging the lug pad and the layout area, such as arranging three lug pads on the lower surface of the rigid circuit board 10, and arranging different layout areas on the upper surface and the lower surface of the rigid circuit board 10, thereby solving the layout problem of the protection plate. Meanwhile, the performance of the three-pole lug battery is improved, good connection is ensured, the advantages of reducing internal resistance and improving overcurrent capacity of the three-pole lug battery are exerted, and the battery life of the mobile phone is prolonged, the charging speed is improved, and the use stability is improved.

[0051] The specific structure of the first flexible circuit board 20 and the second flexible circuit board 30 is optimized as a preferred embodiment.

[0052] Specifically, the first flexible circuit board 20 includes a first connecting section 21, a first bending section 22, and a second connecting section 23 connected in sequence, the first connecting section 21 and the second connecting section 23 are arranged in parallel, the end of the second connecting section 23 away from the first bending section 22 is integrally formed with the end of the rigid circuit board 10, and the first connecting section 21 and the upper surface of the rigid circuit board 10 form a first forbidden layout area 61.

[0053] The second flexible circuit board 30 includes a third connecting section 31, a second bending section 32, and a fourth connecting section 33 connected in sequence, the third connecting section 31 and the fourth connecting section 33 are arranged in parallel, the end of the fourth connecting section 33 away from the second bending section 32 is integrally formed with the end of the rigid circuit board 10, and the third connecting section 31 and the upper surface of the rigid circuit board 10 form a second forbidden layout area 62.

[0054] In the embodiment, the first forbidden layout area 61 is arranged opposite to the first lug pad 41, and the second forbidden layout area 62 is arranged opposite to the second lug pad 42. The opposite position of the upper surface of the rigid circuit board 10 and the third lug pad 43 is arranged as a third forbidden layout area 63.

[0055] In the embodiment, the protection plate for the three-tab battery is integrally formed with the first flexible circuit board 20 and the second flexible circuit board 30 at opposite ends of the rigid circuit board 10 by using the rigid-flexible combination board scheme, so that the space occupied by the soft board welding position is designed as the tab pad of the three-tab battery, thereby providing sufficient layout space for the three-tab battery.

[0056] Therefore, in the embodiment, the first flexible circuit board 20 and the second flexible circuit board 30 are designed to be U-shaped, the second connecting section 23 of the first flexible circuit board 20 is integrally formed with the end of the rigid circuit board 10 away from the first bending section 22, the first connecting section 21 of the first flexible circuit board 20 extends to the upper surface of the rigid circuit board 10 away from the end of the first bending section 22, so that the first forbidden component area 61 is formed between the lower surface of the first connecting section 21 and the upper surface of the rigid circuit board 10.

[0057] Similarly, the third connecting section 31 of the second flexible circuit board 30 is integrally formed with the end of the rigid circuit board 10 away from the second bending section 32, and the fourth connecting section 33 of the second flexible circuit board 30 extends to the upper surface of the rigid circuit board 10 away from the end of the second bending section 32, so that the second forbidden component area 62 is formed between the lower surface of the fourth connecting section 33 and the upper surface of the rigid circuit board 10.

[0058] Preferably, the first flexible circuit board 20 further comprises a first flexible circuit board connector 24 arranged at one end of the first connecting section 21 away from the first bending section 22.

[0059] The second flexible circuit board 30 further comprises a second flexible circuit board connector 34 arranged at one end of the third connecting section 31 away from the second bending section 32.

[0060] In addition, the glue running groove 11 is arranged on the side wall of the rigid circuit board 10, and the glue running groove 11 is arranged opposite to the first tab pad 41, the second tab pad 42 and the third tab pad 43.

[0061] Therefore, by optimizing the structures of the rigid circuit board 10, the first flexible circuit board 20 and the second flexible circuit board 30, the protection plate structure is further improved, and the element layout space is optimized to provide sufficient layout space for the three-tab battery.

[0062] In some optional embodiments, the utility model discloses a three-tab battery,

[0063] In the embodiment, the specific structure of the three-tab battery is as follows, Figures 4-5As shown, the battery includes the battery cell 70, the injection molding plastic structure 80, and the protection plate as described in the above embodiments. The top of the battery cell 70 extends the first tab 71, the second tab 72, and the third tab 73, which are respectively welded to the first tab pad 41, the second tab pad 42, and the third tab pad 43 of the protection plate. The injection molding plastic structure 80 covers the top of the battery cell 70 and the first tab 71, the second tab 72, the third tab 73, and the rigid circuit board 10 of the protection plate.

[0064] Specifically, the battery cell 70 includes an electrode assembly, a shell 74, and the first tab 71, the second tab 72, and the third tab 73. The shell 74 includes a main body part 741 and an encapsulation part 742. The electrode assembly is arranged in the main body part 741. The encapsulation part 742 is connected to the top of the main body part 741 to encapsulate the electrode assembly in the shell 74. The first tab 71, the second tab 72, and the third tab 73 are respectively connected to the electrode assembly and extend out of the encapsulation part 742. The first tab 71, the second tab 72, and the third tab 73 extending out of the encapsulation part 742 are respectively welded and fixed to the first tab pad 41, the second tab pad 42, and the third tab pad 43.

[0065] In the present embodiment, as shown, Figure 8 The injection molding plastic structure 80 covers the encapsulation part 742, the first tab 71, the second tab 72, the third tab 73, and the rigid circuit board 10 of the protection plate. The injection molding plastic structure 80 realizes the insulation protection of the encapsulation part 742, the first tab 71, the second tab 72, the third tab 73, and the rigid circuit board 10 of the protection plate. It also makes the connection of the rigid circuit board 10 and the battery cell 70 more firm, waterproof, and dustproof, and has higher stability. The injection molding plastic structure 80 is integrally formed by the injection molding process, which can improve the drop resistance of the battery. In drop test or daily use, it reduces the risk of battery failure caused by external impact. At the same time, the injection molding process can also cancel the insulating adhesive paper used for insulation and fixation of the rigid circuit board 10, simplify the production process, and reduce the production cost.

[0066] As a preferred embodiment, as shown, Figures 6-7 The upper surface of the injection molding plastic structure 80 is respectively provided with a first recessed part 81 and a second recessed part 82 at opposite ends. The first flexible circuit board connector 24 is located outside the injection molding plastic structure 80 and at the first recessed part 81. The second flexible circuit board connector 34 is located outside the injection molding plastic structure 80 and at the second recessed part 82.

[0067] In addition, the distal ends of the first recessed part 81 and the second recessed part 82 on the upper surface of the injection molding plastic structure 80 are respectively provided with a third recessed part 83 and a fourth recessed part 84, the end of the second connecting section 23 close to the first bending section 22 extends out of the injection molding plastic structure 80 and is located in the third recessed part 83, and the first bending section 22 is located out of the injection molding plastic structure 80 and in the third recessed part 83; the end of the fourth connecting section 33 close to the second bending section 32 extends out of the injection molding plastic structure 80 and is located in the fourth recessed part 84, and the second bending section 32 is located out of the injection molding plastic structure 80 and in the fourth recessed part 84.

[0068] Preferably, the first recessed part 81 and the second recessed part 82 are respectively arranged opposite to the first tab pad 41 and the second tab pad 42.

[0069] In the embodiment, by optimizing the structure of the injection molding plastic structure 80, the bending starting point of the first bending section 22 of the first flexible circuit board 20 can be at any position of the third recessed part 83, which facilitates the bending of the first flexible circuit board 20 according to actual conditions, and further increases the activity space of the first flexible circuit board 20. Similarly, the bending starting point of the second bending section 32 of the second flexible circuit board 30 can be at any position of the fourth recessed part 84, which facilitates the bending of the second flexible circuit board 30 according to actual conditions, and further increases the activity space of the second flexible circuit board 30.

[0070] In addition, the third recessed part 83 and the fourth recessed part 84 also make the root position of the first flexible circuit board 20 and the second flexible circuit board 30 covered by the injection molding plastic structure 80 lower, thereby increasing the activity space of the first flexible circuit board 20 and the second flexible circuit board 30, facilitating the assembly of the whole machine, and also improving the anti-shock and anti-impact performance of the battery. This is because when the battery is subjected to vibration or impact, the first flexible circuit board 20 and the second flexible circuit board 30 have a larger space for deformation, and are not easy to be pulled or stuck to cause damage. In addition, the third recessed part 83 and the fourth recessed part 84 can also reduce the installation position of the first flexible circuit board 20 and the second flexible circuit board 30, thereby reducing the thickness of the first flexible circuit board 20 and the second flexible circuit board 30 on the head side of the battery cell 70, and improving the capacity density of the battery.

[0071] The height differences between the first recess 81 and the second recess 82 and the top surface of the injection molding plastic structure 80 form accommodation spaces for accommodating the first connecting section 21 of the first flexible circuit board 20 and the third connecting section 31 of the second flexible circuit board 30, so that the first flexible circuit board connector 24 and the second flexible circuit board connector 34 have greater activity space in the direction with the height difference, and meanwhile, the height of the first flexible circuit board connector 24 and the second flexible circuit board connector 34 protruding from the top surface of the injection molding plastic structure 80 can be reduced, and the overall volume of the battery can be reduced. The distance between the top surface of the injection molding plastic structure 80 and the rigid circuit board 10 is large, so that the space between the first recess 81 and the second recess 82 can be used to accommodate components with a greater height, the internal space of the injection molding plastic structure 80 is reasonably utilized, and the energy density of the battery is improved.

[0072] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] In the description of the present application, it should be pointed out that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, structure and operation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0074] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the parts must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0075] In the utility model, unless another definite provision and limitation, first feature is above or below second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through additional feature between them.

[0076] Although the description of the utility model is combined with above specific embodiment, it is obvious that many substitutions, modifications and changes can be made according to the above-mentioned content by the person skilled in the art. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A guard plate for a tri-tab cell, characterized by, The application relates to a rigid circuit board (10), a first flexible circuit board (20) and a second flexible circuit board (30), the first flexible circuit board (20) and the second flexible circuit board (30) being integrally formed with opposite ends of the rigid circuit board (10) respectively; first tab pads (41) and second tab pads (42) are arranged at opposite ends of a lower surface of the rigid circuit board (10) respectively, a third tab pad (43) is arranged between the first tab pads (41) and the second tab pads (42), and a first cloth area (51) is arranged between the first tab pads (41) and the third tab pad (43) and between the second tab pads (42) and the third tab pad (43) on the lower surface of the rigid circuit board (10); and a second cloth area (52) is arranged at a position opposite to the first cloth area (51) on an upper surface of the rigid circuit board (10). The first flexible circuit board (20) comprises a first connecting section (21), a first bending section (22) and a second connecting section (23) connected in sequence, the first connecting section (21) and the second connecting section (23) are arranged in parallel, an end of the second connecting section (23) away from the first bending section (22) is integrally formed with an end of the rigid circuit board (10), and a first cloth-prohibited area (61) is formed between the first connecting section (21) and the upper surface of the rigid circuit board (10).

2. A guard plate for a three tab cell according to claim 1, characterised in that, And / or, the second flexible circuit board (30) comprises a third connecting section (31), a second bending section (32) and a fourth connecting section (33) connected in sequence, the third connecting section (31) and the fourth connecting section (33) are arranged in parallel, an end of the fourth connecting section (33) away from the second bending section (32) is integrally formed with an end of the rigid circuit board (10), and a second cloth-prohibited area (62) is formed between the third connecting section (31) and the upper surface of the rigid circuit board (10). The first cloth-prohibited area (61) is arranged opposite to the first tab pad (41), and the second cloth-prohibited area (62) is arranged opposite to the second tab pad (42).

3. A guard plate for a three tab cell according to claim 2, characterised in that, A third cloth-prohibited area (63) is arranged at a position opposite to the third tab pad (43) on the upper surface of the rigid circuit board (10).

4. A guard plate for a three tab cell according to claim 1, characterized in that The first flexible circuit board (20) further comprises a first flexible circuit board connector (24) arranged at one end of the first connecting section (21) away from the first bending section (22).

5. A guard plate for a three tab cell according to claim 2, characterized in that And / or, the second flexible circuit board (30) further comprises a second flexible circuit board connector (34) arranged at one end of the third connecting section (31) away from the second bending section (32). The side wall of the rigid circuit board (10) is provided with a glue groove (11) arranged opposite to the first tab pad (41), the second tab pad (42) and the third tab pad (43) respectively.

6. A guard plate for a three-tab cell according to claim 1, characterized in that ​ 7. A three-terminal tab cell characterized by, The protection plate comprises an electric core (70), an injection molding plastic structure (80), and the protection plate of any one of claims 1-6, the top of the electric core (70) extends a first tab (71), a second tab (72), and a third tab (73), the first tab (71), the second tab (72), and the third tab (73) are respectively welded with the first tab pad (41), the second tab pad (42), and the third tab pad (43) of the protection plate; the injection molding plastic structure (80) covers the top of the electric core (70) and covers the first tab (71), the second tab (72), the third tab (73), and the rigid circuit board (10) of the protection plate.

8. A three tab cell according to claim 7, characterised in that, The upper surface of the injection molding plastic structure (80) is respectively provided with a first recess (81) and a second recess (82) at opposite ends, the first flexible circuit board connector (24) is located outside the injection molding plastic structure (80) and at the position of the first recess (81), and the second flexible circuit board connector (34) is located outside the injection molding plastic structure (80) and at the position of the second recess (82).

9. A three tab cell according to claim 8, characterised in that, The distal ends of the first recess (81) and the second recess (82) on the upper surface of the injection molding plastic structure (80) are respectively provided with a third recess (83) and a fourth recess (84), the end of the second connecting section (23) close to the first bending section (22) extends outside the injection molding plastic structure (80) and is located in the third recess (83), and the first bending section (22) is located outside the injection molding plastic structure (80) and in the third recess (83). The end of the fourth connecting section (33) close to the second bending section (32) extends outside the injection molding plastic structure (80) and is located in the fourth recess (84), and the second bending section (32) is located outside the injection molding plastic structure (80) and in the fourth recess (84).

10. A three tab cell according to claim 8, characterised in that, The first recess (81) and the second recess (82) are respectively arranged opposite to the first tab pad (41) and the second tab pad (42).

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