Battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery, which comprises a battery core assembly, a protection plate assembly and an injection molding structural member. The cell assembly is provided with an electrode end surface; the protection plate assembly comprises a printed circuit board, and the printed circuit board is parallel to the electrode end face and arranged on the electrode end face. The injection molding structural part is connected to the battery cell assembly and wraps the protection plate assembly, the injection molding structural part comprises a first side face and a second side face which are opposite to each other, the first side face is provided with a limiting groove facing the protection plate assembly, and the second side face is provided with a limiting hole facing the protection plate assembly. According to the battery disclosed by the utility model, the problems that a distribution forbidding area needs to be arranged on the printed circuit board and the upper surface of the circuit board is exposed after demolding when the ejector pins fix the printed circuit board from the upper part of the printed circuit board are solved, and meanwhile, the printed circuit board cannot generate transverse deviation in the injection molding process; therefore, the injection molding structural member can better wrap the printed circuit board, and the stability and reliability of battery packaging are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, especially a kind of battery. BACKGROUND

[0002] In the field of traditional soft package lithium battery, the cell packaging has been a key process in the industry. In recent years, the integration of mobile terminals such as mobile phones is getting higher and higher, which makes the space inside for arranging the cell more and more limited, and the requirement for the improvement of battery energy density is getting higher and higher. The folded top sealed battery can save packaging space, thereby improving the space of the cell body to achieve the purpose of improving the capacity of the battery.

[0003] In the prior art, the injection molding part covers the circuit board and the cell to protect the circuit board and the cell, and the injection molding part has high insulation performance. However, in the injection molding process, it is necessary to ensure that the circuit board can be completely covered in the injection molding part. In the limited space, the injection molding material in the molten state is easy to move the circuit board, which causes the circuit board to be offset, so that the covering cannot be effectively carried out. At present, the ejector pin is used to respectively push the circuit board from the top and side of the circuit board, so as to fix the circuit board on the cell. However, this arrangement needs to set a forbidden area on the circuit board to avoid interference between the ejector pin above the circuit board and the circuit board, and it is difficult to ensure the accurate positioning of the circuit board in the thickness direction of the cell. Moreover, after the injection molding is completed, the ejector pin is removed, which exposes the upper surface of the circuit board. UTILITY MODEL CONTENT

[0004] In order to solve the problems of the prior art, the utility model provides a battery, which avoids the need to set a forbidden area on the printed circuit board when the ejector pin fixes the printed circuit board from above, and the upper surface of the circuit board is exposed after demolding. At the same time, the printed circuit board will not be horizontally offset during the injection molding process, so that the injection molding structure can better cover the printed circuit board, and the stability and reliability of the battery packaging are ensured.

[0005] The technical effects achieved by the utility model are realized by the following technical solutions:

[0006] The utility model provides a battery, which comprises:

[0007] The cell assembly has an electrode end face;

[0008] The protection plate assembly comprises a printed circuit board, which is arranged on the electrode end face parallel to the electrode end face; and

[0009] The injection molding structure is connected to the battery cell assembly and covers the protection plate assembly, and the injection molding structure comprises a first side and a second side opposite to each other, the first side is provided with a limiting groove facing the protection plate assembly, and the second side is provided with a limiting hole facing the protection plate assembly.

[0010] The printed circuit board comprises a first edge and a second edge opposite to each other, at least a part of the first edge is exposed to the bottom of the limiting groove, and at least a part of the second edge is exposed to the bottom of the limiting hole.

[0011] In some implementations, the first edge is flush with the bottom of the limiting groove.

[0012] In the implementation, the first edge of the printed circuit board is flush with the bottom of the limiting groove of the injection molding structure, so that the injection molding structure can better protect the printed circuit board, and the overall structure is more compact.

[0013] In some implementations, the first edge does not protrude from the plane where the first side is located.

[0014] In the implementation, the injection molding structure covers the printed circuit board, so as to avoid the printed circuit board being exposed, thereby ensuring the reliability of the circuit board and prolonging the service life of the battery.

[0015] In some implementations, the distance between the first edge and the first side is any value in the range of 0.05mm-0.4mm.

[0016] In some implementations, a glue groove is formed on the first edge and / or the second edge.

[0017] In the implementation, the glue flows through the glue groove to flow into the battery cell assembly and the printed circuit board more quickly, thereby improving the injection molding efficiency of the battery.

[0018] In some implementations, the depth of the glue groove is any value in the range of 0.3mm-1.0mm.

[0019] In some implementations, the surrounding of the glue groove is set as a forbidden area.

[0020] In some implementations, the protection plate assembly further comprises a flexible circuit board, a first end of the flexible circuit board is connected to a side of the printed circuit board facing the electrode end face, the flexible circuit board extends from the injection molding structure and is bent, so that a second end of the flexible circuit board extends above the injection molding structure.

[0021] In the present implementation, one end of the flexible circuit board is electrically connected to the side of the printed circuit board facing the electrode end surface, the flexible circuit board is bent so that the second end of the flexible circuit board extends to the side of the printed circuit board away from the electrode end surface, the injection molding structure is connected to the electrode end surface and covers the printed circuit board and the flexible circuit board after injection molding, and the second end of the flexible circuit board is located above the injection molding structure after the flexible circuit board extends from the injection molding structure and is bent.

[0022] In some implementations, the injection molding structure is formed with a recess at a corresponding position of the bent position of the flexible circuit board, and part of the flexible circuit board is located in the recess.

[0023] In some implementations, the protection plate assembly further comprises a first electronic device and a second electronic device, the first electronic device is connected to the side of the printed circuit board facing the electrode end surface, and the second electronic device is connected to the side of the printed circuit board away from the electrode end surface.

[0024] In summary, the present application has at least the following advantages:

[0025] The battery provided by the present application is connected to the electrode end surface through the printed circuit board parallel to the electrode end surface, the ejector pin of the mold presses against the first edge and the second edge of the printed circuit board during injection molding, and the injection molding structure formed after injection molding is connected to the electrode end surface of the battery cell assembly and covers the printed circuit board, so that the printed circuit board and the battery cell assembly are stably connected, the limiting groove and the limiting hole formed by the ejector pin pressing against the printed circuit board after demolding are located on the two sides of the injection molding structure away from each other, which avoids the need to set a forbidden area on the printed circuit board when the ejector pin fixes the printed circuit board from above, and the upper surface of the circuit board is exposed after demolding, and the printed circuit board does not produce lateral deviation during injection molding, so that the injection molding structure can better cover the printed circuit board, and the stability and reliability of the battery package are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the battery of Example 1;

[0027] Figure 2 It is a structural schematic diagram of the battery of Example 1; Figure 1 It is a partial enlarged schematic view of the battery shown in A;

[0028] Figure 3 It is a structural schematic diagram of the injection molding structure shown in B; Figure 2 It is a partial enlarged schematic view of the battery shown in A;

[0029] Figure 4 It is a partial sectional view of the battery of Example 2;

[0030] Figure 5Exploded view of the battery of Example 3;

[0031] Figure 6 Structure schematic view of the battery of Example 3;

[0032] Figure 7 For Figure 6 Structure schematic view of the printed circuit board shown.

[0033] Marked in the figure:

[0034] 1, cell assembly; 11, electrode end face;

[0035] 2, protection plate assembly; 21, printed circuit board; 211, first edge; 2111, glue groove; 2112, forbidden cloth area; 212, second edge; 22, flexible circuit board; 23, first electronic device; 24, second electronic device;

[0036] 3, injection molded structure; 31, first side; 311, limiting groove; 32, second side; 321, limiting hole; 33, recess. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. The described embodiments are part of the embodiments of the utility model, not all of the embodiments.

[0038] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0039] Example 1:

[0040] Please refer to the drawings Figure 1 Drawings Figure 3 The battery of the utility model comprises a cell assembly 1, a protection plate assembly 2 and an injection molded structure 3.

[0041] Among them, please combine Figures 1-3 , Figure 1 and Figure 2 The structural relationship among the cell assembly 1, the protection plate assembly 2 and the injection molded structure 3 in the embodiments of the utility model is shown, Figure 3The specific structure of the limiting hole 321 is shown in the embodiment of the utility model. Specifically, the electric core assembly 1 has an electrode end face 11; the protection plate assembly 2 comprises a printed circuit board 21, the printed circuit is arranged on the electrode end face 11 and parallel to the electrode end face 11; the injection molding structural part 3 is connected to the electric core assembly 1 and covers the protection plate assembly 2, the injection molding structural part 3 comprises a first side face 31 and a second side face 32 opposite to each other, the first side face 31 is provided with a limiting groove 311 facing the protection plate assembly 2, and the second side face 32 is provided with a limiting hole 321 facing the protection plate assembly 2. Wherein, the printed circuit board 21 comprises a first edge 211 and a second edge 212 opposite to each other, at least a part of the first edge 211 is exposed to the bottom of the limiting groove 311, and at least a part of the second edge 212 is exposed to the bottom of the limiting hole 321.

[0042] It should be noted that the above-mentioned electrode end face 11 actually refers to one side end face of the electric core, and the end face is arranged with a tab assembly extending out of the electric core. Or the end face where the tab assembly and the external electrical connection part are located. The first side face 31 and the second side face 32 of the injection molding structural part 3 specifically refer to two side faces of the injection molding structural part 3 perpendicular to the electrode end face 1 and opposite to each other, and the first side face 31 and the second side face 32 are connected with the electrode end face 11. In the preferred case, the first side face 31 and the second side face 32 are the side faces corresponding to the long side of the injection molding structural part 3.

[0043] The printed circuit board 21 adopts a hard board structure, which is usually pressed from multi-layer fiber glass or similar high-strength and high-insulation materials. These materials not only provide good mechanical support, but also ensure the electrical performance and physical stability of the circuit board in complex environments.

[0044] The first edge 211 and the second edge 212 of the printed circuit board 21 are two edges of the printed circuit board 21 parallel to the first side face 31 and / or the second side face 32 and opposite to each other. It should be noted that the first edge 211 and the second edge 212 do not refer to the edges corresponding to the planes of the upper and lower surfaces of the printed circuit board 21, but specifically refer to the side edges of the printed circuit board 21, which can reflect the thickness of the printed circuit board 21 in the vertical direction.

[0045] In the embodiment, the printed circuit board 21 is arranged parallel to the electrode end face 11 of the electric core assembly 1, so that the printed circuit board 21 is as close as possible to the electrode end face 11 of the electric core assembly 1, reducing the overall height of the battery after injection molding. At the same time, it is also convenient for the mold to fix the printed circuit board 21 when injecting glue.

[0046] The injection structure 3 formed by injection molding is connected to the cell assembly 1 and covers the printed circuit board 21, so that the printed circuit board 21 and the cell assembly 1 form an integral whole, improving the connection stability between the printed circuit board 21 and the cell assembly 1, thereby ensuring the reliability of the battery.

[0047] In some embodiments, the printed circuit board 21 includes a first edge 211 and a second edge 212 opposite to each other. The first edge 211 is covered in the first side 31 of the injection structure 3, and the second edge 212 is covered in the first side 31 of the injection structure 3. In a preferred case, the first edge 211 is parallel to the first side 31, and the second edge 212 is parallel to the second side 32. Meanwhile, the limiting groove 311 provided on the first side 31 of the injection structure 3 can make a part of the first edge 211 exposed at the bottom of the limiting groove 311; the limiting hole 321 provided on the second side 32 of the injection structure 3 can make a part of the second edge 212 exposed at the bottom of the limiting hole 321.

[0048] Generally, in order to better protect and position the printed circuit board 21, the exposed parts of the first edge 211 and the second edge 212 of the printed circuit board 21 can meet the injection requirements of the injection mold. In particular for the second edge 212, the size and number of the limiting hole 321 can be minimized. Preferably, it can be but not limited to no more than 2. Meanwhile, the hole diameter of the limiting hole 321 is preferably no greater than the thickness of the printed circuit board 21, so as to avoid the upper and lower surfaces of the printed circuit board 21 exposed to the outside.

[0049] Specifically, during injection molding, the printed circuit board 21 is electrically connected to the electrode end face 11 in parallel to the electrode end face 11, the ejector pins of the mold respectively abut against the first edge 211 and the second edge 212 of the printed circuit board 21, and the printed circuit board 21 is stably fixed at the predetermined position, avoiding displacement of the printed circuit board 21 caused by the flowing plastic during injection molding. The injection structure 3 is formed in the injection mold by low-pressure injection molding, and covers the printed circuit board 21, so that most of the structure is isolated from the outside.

[0050] Because the ejector pins of the mold continuously abut against the first edge 211 and the second edge 212 of the printed circuit board 21 during injection molding, the injection structure 3 formed after injection molding has the limiting groove 311 and the limiting hole 321 formed on the two opposite sides, respectively. In this way, on the basis of ensuring that the printed circuit board 21 is parallel and fixed on the electrode end face 11 during injection molding, the need for setting a non-printing area 2112 on the printed circuit board 21 when the ejector pins of the mold fix the printed circuit board 21 from above is avoided, and the problem that the upper surface of the circuit board is exposed after injection molding and demolding is also avoided.

[0051] The battery, the printed circuit board 21 is electrically connected with the electrode end surface 11 in parallel to the electrode end surface 11, the ejector pin of the mold is pressed against the first edge 211 and the second edge 212 of the printed circuit board 21 respectively during injection molding, and the injection molding structure 3 formed after injection molding is connected to the electrode end surface 11 of the battery cell assembly 1 and covers the printed circuit board 21, so that the printed circuit board 21 and the battery cell assembly 1 are stably connected, the limiting groove 311 and the limiting hole 321 formed due to the printed circuit board 21 being pressed by the ejector pin after demolding are located on two sides of the injection molding structure 3 away from each other, the printed circuit board 21 needs to be provided with a forbidden area 2112 when the ejector pin fixes the printed circuit board 21 from above, and the upper surface of the printed circuit board is exposed after demolding, and meanwhile, the printed circuit board 21 will not be laterally offset during injection molding, so that the injection molding structure 3 can better cover the printed circuit board 21, and the stability and reliability of the battery package are ensured.

[0052] Embodiment 2

[0053] The difference between this embodiment and embodiment 1 is that the battery of the utility model is further optimized in structure in this embodiment, please refer to the accompanying drawings Figure 2 and the accompanying drawings Figure 4 .

[0054] Among them, please refer to Figure 4 , Figure 4 the structural relationship between the first edge 211 and the limiting groove 311 in the embodiment of the utility model is shown. Specifically, the first edge 211 is flush with the bottom of the limiting groove 311.

[0055] In this embodiment, the first edge 211 of the printed circuit board 21 is flush with the bottom of the limiting groove 311 of the injection molding structure 3, so that the injection molding structure 3 can better protect the printed circuit board 21, and the overall structure is more compact.

[0056] Of course, the first edge 211 is not limited to being flush with the bottom of the limiting groove 311, in some other embodiments, the first edge 211 protrudes from the bottom of the limiting groove 311 but does not protrude from the top of the limiting groove 311, in this state, the edge of the printed circuit board 21 can be matched with the mold by using the edge of the glue injection groove, so that the printed circuit board 21 is better fixed during injection molding, and the upper surface and the lower surface of the printed circuit board 21 are also exposed to the limiting groove or the outside.

[0057] In some other embodiments, the first edge 211 can also be flush with the top of the limiting groove 311, so as to increase the surface area of the printed circuit board 21, and further improve the stability and reliability of the printed circuit board 21.

[0058] In some preferred embodiments, the first edge 211 does not protrude from the plane where the first side 31 is located. In this way, the injection molding structure 3 can cover the printed circuit board 21, so as to avoid the printed circuit board 21 being exposed, thereby ensuring the reliability of the circuit board and prolonging the service life of the battery.

[0059] In some preferred embodiments, the distance between the first edge 211 and the first side 31 is any value within the range of 0.05mm-0.4mm. In this way, the plastic can flow between the battery cell assembly 1 and the printed circuit board 21 through the gap formed between the first edge 211 and the first side 31 during injection molding, so as to make the connection between the printed circuit board 21 and the battery cell assembly 1 more stable and enhance the reliability of the injection molding structure 3. Preferably, the distance between the first edge 211 and the first side 31 is 0.1mm.

[0060] It can be understood that the distance between the first edge 211 and the first side 31 is actually the distance between the first edge 211 and the mold, and the plastic is injected from above the printed circuit board 21 and then flows onto the upper surface of the printed circuit board 21 and between the printed circuit board 21 and the battery cell assembly 1, so as to make the injection more reliable.

[0061] In some preferred embodiments, please refer to Figure 2 , Figure 2 The structural relationship between the first edge 211 and the glue passing groove 2111 in the embodiments of the present application is shown. Specifically, the glue passing groove 2111 is formed on the first edge 211 and / or the second edge 212. The plastic can flow into the battery cell assembly 1 and the printed circuit board 21 through the glue passing groove 2111 more quickly, thereby improving the injection efficiency of the battery and also increasing the connection area of the glue between the printed circuit board 21 and the electrode end surface 11 of the battery cell assembly 1, so as to make the overall structure more stable.

[0062] In some preferred embodiments, the depth of the glue passing groove 2111 is any value within the range of 0.3mm-1.0mm. In this way, the plastic can flow into the battery cell assembly 1 and the printed circuit board 21 through the glue passing groove 2111, thereby ensuring the reliability of the injection molding structure 3. Preferably, the depth of the glue passing groove 2111 is 0.5mm.

[0063] In some more preferred embodiments, the periphery of the glue passing groove 2111 is provided as a no-printing area 2112. No electronic components and conductive circuits are arranged in the no-printing area 2112, so as to avoid the plastic damaging the electrical circuits when passing through the glue passing groove 2111, thereby ensuring the stability and reliability of the printed circuit board 21.

[0064] Embodiment 3:

[0065] The difference between the embodiment and the embodiment 2 is that the embodiment further optimizes the structure of the battery of the utility model, please refer to the attached Figure 5 The difference between the embodiment and the embodiment 2 is that the embodiment further optimizes the structure of the battery of the utility model, please refer to the attached Figure 7 .

[0066] Among them, please combine Figure 5 And Figure 6 , Figure 5 And Figure 6 The structural relationship among the flexible circuit board 22, the printed circuit board 21 and the injection molding structural part 3 in the embodiment of the utility model is shown. Specifically, the protection plate assembly 2 further comprises a flexible circuit board 22, the first end of the flexible circuit board 22 is connected to one side of the printed circuit board 21 facing the electrode end surface 11, the flexible circuit board 22 extends from the injection molding structural part 3 and is bent to make the second end of the flexible circuit board 22 extend above the injection molding structural part 3.

[0067] In the embodiment, one end of the flexible circuit board 22 is electrically connected to one side of the printed circuit board 21 facing the electrode end surface 11, the flexible circuit board 22 is bent to make the second end of the flexible circuit board 22 extend to one side of the printed circuit board 21 away from the electrode end surface 11, after the injection molding is completed, the injection molding structural part 3 is connected to the electrode end surface 11 and covers the printed circuit board 21 and the flexible circuit board 22, the flexible circuit board 22 extends from the injection molding structural part 3 and is bent, so that the second end of the flexible circuit board 22 is located above the injection molding structural part 3.

[0068] In some preferred embodiments, the corresponding position of the bending part of the injection molding structural part 3 and the flexible circuit board 22 is formed with a recess 33, and part of the flexible circuit board 22 is located in the recess 33. After the flexible circuit board 22 is bent, part of the flexible circuit board 22 is located in the recess 33, thereby reducing the occupied space of the flexible circuit board 22, and further making the occupied space of the injection molding structural part 3 and the protection plate assembly 2 smaller.

[0069] In some more preferred embodiments, please combine Figure 5 And Figure 7 , Figure 5 And Figure 7 The structural relationship among the first electronic device 23 and the second electronic device 24 in the embodiment of the utility model is shown. Specifically, the protection plate assembly 2 further comprises a first electronic device 23 and a second electronic device 24, the first electronic device 23 is connected to one side of the printed circuit board 21 facing the electrode end surface 11, and the second electronic device 24 is connected to one side of the printed circuit board 21 away from the electrode end surface 11. The first electronic device 23 and the second electronic device 24 are respectively arranged on the two sides of the printed circuit board 21 away from each other, thereby ensuring the reliability of the printed circuit board 21.

[0070] The utility model discloses a battery, printed circuit board 21 parallel to electrode end surface 11 with electrode end surface 11 electricity is connected, and the ejector pin of mould is pressed against the first edge 211 and the second edge 212 of printed circuit board 21 respectively when injection moulding, and the injection moulding structural member 3 formed after injection moulding is connected in the electrode end surface 11 of electric core subassembly 1 and covers printed circuit board 21, to make the stable connection between printed circuit board 21 and electric core subassembly 1, and the limiting groove 311 and the limiting hole 321 formed after ejecting due to the ejector pin pressing against printed circuit board 21 are located at the two sides of injection moulding structural member 3 opposite each other, avoid when the ejector pin fixes printed circuit board 21 from the top of printed circuit board 21, need to set up the forbidden cloth area 2112 on printed circuit board 21, and the upper surface of circuit board is exposed after ejecting, make printed circuit board 21 not produce horizontal deviation in the injection moulding process simultaneously, thereby make injection moulding structural member 3 can better cover printed circuit board 21, guarantee the stability and reliability of battery package.

[0071] In the utility model, unless another explicit stipulation and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning in the utility model.

[0072] In the description of the utility model, it is necessary to explain that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" is based on the orientation or position relationship shown in the drawing, or the orientation or position relationship of the utility model product when using, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, so it can not be understood as the limitation of the utility model.In addition, the terms "first", "second", "third" and so on are only used for distinguishing description, and can not be understood as indicating or implying relative importance.

[0073] In addition, the terms "horizontal", "vertical", "overhang" and so on do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined.For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0074] 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.

[0075] 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 battery, characterized by, The application relates to a battery cell assembly (1) having an electrode end face (11), a protection plate assembly (2) comprising a printed circuit board (21) arranged parallel to the electrode end face (11) on the electrode end face (11), and an injection-molded structure (3) connected to the battery cell assembly (1) and covering the protection plate assembly (2), the injection-molded structure (3) comprising a first side (31) and a second side (32) facing away from each other, the first side (31) being provided with a limiting groove (311) facing the protection plate assembly (2), and the second side (32) being provided with a limiting hole (321) facing the protection plate assembly (2), wherein the printed circuit board (21) comprises a first edge (211) and a second edge (212) facing away from each other, at least a part of the first edge (211) being exposed to the bottom of the limiting groove (311), and at least a part of the second edge (212) being exposed to the bottom of the limiting hole (321). The first edge (211) is flush with the bottom of the limiting groove (311). The first edge (211) does not protrude from the plane in which the first side (31) is located. The distance between the first edge (211) and the first side (31) is any value within the range of 0.05 mm to 0.4 mm. A glue groove (2111) is formed on the first edge (211) and / or the second edge (212).

2. The battery of claim 1, wherein, The depth of the glue groove (2111) is any value within the range of 0.3 mm to 1.0 mm.

3. The battery of claim 1, wherein, The periphery of the glue groove (2111) is provided as a forbidden area (2112).

4. The battery according to claim 2 or 3, characterized in that, The protection plate assembly (2) further comprises a flexible circuit board (22), a first end of the flexible circuit board (22) being connected to the side of the printed circuit board (21) facing the electrode end face (11), the flexible circuit board (22) extending out of the injection-molded structure (3) and being bent so that a second end of the flexible circuit board (22) extends above the injection-molded structure (3).

5. The battery of claim 1, wherein, A recess (33) is formed in the injection-molded structure (3) at a position corresponding to the bent part of the flexible circuit board (22), and a part of the flexible circuit board (22) is located in the recess (33).

6. The battery of claim 5, wherein, The protection plate assembly (2) further comprises a first electronic device (23) and a second electronic device (24), the first electronic device (23) being connected to the side of the printed circuit board (21) facing the electrode end face (11), and the second electronic device (24) being connected to the side of the printed circuit board (21) facing away from the electrode end face (11).

7. The battery of claim 6, wherein, ​ 8. The battery of claim 1, wherein, ​ 9. The battery of claim 8, wherein, ​ 10. The battery of claim 1, wherein, ​

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