Battery

Abstract

The utility model provides a battery. The battery comprises a battery cell, a protection plate and an injection molding rubber structural body, the battery cell is provided with a tab and a top sealing edge, and the tab extends out of the top sealing edge; the protection plate is connected with the tabs and comprises a main plate positioned on one side, deviating from the battery cell, of the top sealing edge and at least one flexible circuit board connected with the main plate; the injection molding plastic structural body at least wraps the tab, the top sealing edge, the mainboard and part of the flexible circuit board, the output end of the flexible circuit board is located outside the injection molding plastic structural body, a groove is formed in the position, corresponding to the extending position of the output end, of the injection molding plastic structural body, and at least part of the output end is located in the groove; the minimum groove width of the groove in the first direction is not less than 2 mm, and the groove depth of the groove in the second direction is not less than 0.5 mm, so that effective protection of elements such as the protection plate is realized through the injection molding plastic structural body, and sufficient activity space of the flexible circuit board is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery. Background Art

[0002] Lithium-ion batteries are not only widely used in portable electronic devices such as mobile phones and laptops, but also in electric vehicles, electric bicycles, energy storage facilities, battery swap stations, smart devices, etc.

[0003] The cell is one of the main components of the battery. In the related art, a protective plate is usually set on the top of the cell to protect the cell from damage or explosion risks caused by abnormal conditions such as overcharging, overdischarging, and short circuit. However, when the battery of the related art is subjected to a drop test, the protective plate and other components on the top of the cell may be damaged due to the impact. Utility Model Content

[0004] In view of this, the embodiments of the present utility model are dedicated to providing a battery, so as to at least protect components such as a protection plate on the top of the battery cell, and to facilitate adjusting the position of the output end of the protection plate.

[0005] The utility model provides a battery, including a battery core, a protection plate and an injection molding structure;

[0006] The battery cell has a tab and a top seal, the tab extending from the top seal; the protection plate is connected to the tab, and the protection plate includes a main board located on a side of the top seal away from the battery cell and at least one flexible circuit board connected to the main board;

[0007] The injection molding structure at least covers the tab, the top edge seal, the main board and part of the flexible circuit board, the output end of the flexible circuit board is located outside the injection molding structure, and a groove is formed at a position of the injection molding structure corresponding to the output end extending therefrom, and at least part of the output end is located in the groove;

[0008] The minimum groove width of the groove in the first direction is not less than 2 mm, and the groove depth of the groove in the second direction is not less than 0.5 mm.

[0009] Optionally, the groove includes a first side groove wall and a groove bottom wall connected to one end of the first side groove wall close to the top sealing edge, and the output end extends from the first side groove wall into the groove.

[0010] Optionally, the angle between the first side groove wall and the groove bottom wall ranges from 90° to 100°;

[0011] And / or, the notch width of the groove in the first direction is greater than the bottom width of the groove in the first direction, and the width of the bottom wall of the groove in the first direction is not less than 2 mm.

[0012] Optionally, the top sealing edge forms a sealing edge convex angle on at least one side in the first direction, and the injection-molded plastic structure also covers the sealing edge convex angle.

[0013] Optionally, an injection-molded convex platform is formed in the area of the injection-molded plastic structure corresponding to covering the sealing edge convex angle;

[0014] The groove further includes a second side wall opposite to the first side wall, one end of the second side wall close to the top sealing edge is connected to the bottom wall, and one side of the injection-molded convex platform facing the output end forms the second side wall.

[0015] Optionally, the width of the top surface of the injection-molded convex platform in the first direction is not less than 1.5 mm.

[0016] Optionally, the height of the surface of the output end close to the top sealing edge is not higher than the height of the top surface of the sealing edge convex angle;

[0017] And / or, the included angle range between the second side wall and the bottom wall is 90° - 150°;

[0018] Optionally, the included angle range between the second side wall and the bottom wall is 95° - 140°

[0019] Optionally, the height of the surface of the output end close to the top sealing edge is higher than the height of the top surface of the sealing edge convex angle;

[0020] And / or, the included angle range between the top surface of the area of the injection-molded plastic structure covering the sealing edge convex angle and the horizontal plane is -10° - 10°;

[0021] And / or, the top surface of the area of the injection-molded plastic structure covering the sealing edge convex angle is not higher than the bottom wall.

[0022] Optionally, the flexible circuit board is arranged on at least one side of the protection board in the first direction;

[0023] The height of the top surface of at least the area of the injection-molded plastic structure covering the main board is not lower than the height of the top surface of the injection-molded convex platform.

[0024] The battery provided by the present utility model is provided with an injection molding structure body at the top of the battery cell. Through the injection molding structure body, at least components at the top of the battery cell such as the tab, the top sealing edge, the main board of the protection board, and part of the flexible circuit board are protected, avoiding the occurrence of damage and other situations to the components at the top of the battery cell such as the protection board due to impact (such as during a drop test).

[0025] Meanwhile, by forming a groove at the position corresponding to the output end of the flexible circuit board in the injection molding structure body, that is, at least making the bending point of the flexible circuit board located in the groove, it is convenient to bend the flexible circuit board according to the actual situation to adjust the specific position of the output end; and making the minimum groove width of the groove in the first direction not less than 2 mm, so that the groove can be compatible with more redundant dimensions of the flexible circuit board, further ensuring that the flexible circuit board has sufficient movement space, making it more convenient to bend and adjust the flexible circuit board, and improving production efficiency.

[0026] Moreover, the groove depth of the groove in the second direction is set to be not less than 0.5 mm. While further ensuring that the flexible circuit board has sufficient movement space, the groove can at least protect and accommodate and hide the bending part of the output end of the flexible circuit board to avoid the situation that the bending part of the output end of the flexible circuit board protrudes too much from the plane where the notch of the groove is located and is damaged due to pressure; in addition, such a setting can reduce the occupied space of the flexible circuit board in the length direction of the battery cell, thereby reducing the volume of the entire battery, and thus improving the energy density of the battery.

[0027] That is to say, the battery provided by the present utility model can not only effectively protect components such as the protection board at the top of the battery cell, reducing the risk of damage to the components due to impact to a certain extent; at the same time, it ensures that the flexible circuit board has sufficient active space, facilitating flexible adjustment of the position of the output end of the flexible circuit board, and can also better accommodate and hide the bending part of the flexible circuit board to avoid the situation of damage due to pressure, and in addition, it improves the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the battery cell described in an embodiment of the present utility model before unsealing the sealing edge;

[0029] Figure 2 is a schematic structural diagram of the battery cell described in an embodiment of the present utility model after folding the sealing edge;

[0030] Figure 3 is a schematic structural diagram of the battery cell described in an embodiment of the present utility model after connecting the protection board;

[0031] Figure 4 is Figure 3 the corresponding side view structural diagram;

[0032] Figure 5 is Figure 4 an enlarged view of the structure at position I in

[0033] Figure 6 a schematic structural view of a battery according to an embodiment of the present utility model Figure 1 ;

[0034] Figure 7 is Figure 6 an enlarged view of the structure at position I in

[0035] Figure 8 a schematic structural view of a battery according to an embodiment of the present utility model Figure 2 ;

[0036] Figure 9 is Figure 8 a schematic view of the explosion structure of the battery described above;

[0037] Figure 10 is Figure 9 an enlarged view of the structure at position I in

[0038] Figure 11 a schematic structural view of a battery according to an embodiment of the present utility model Figure 3 。

[0039] Among them, 1 is the battery cell; 11 is the housing; 111 is the top sealing edge; 112 is the side sealing edge; 113 is the sealing edge convex corner; 12 is the tab; 2 is the protection board; 21 is the main board; 22 is the flexible circuit board; 221 is the output end; 222 is the connector; 223 is the first connection section; 224 is the bending section; 225 is the second connection section; 3 is the injection plastic structure body; 31 is the groove; 311 is the first side groove wall; 312 is the second side groove wall; 313 is the groove bottom wall; 32 is the injection convex platform; 4 is the first insulating member; 5 is the second insulating member. Specific Embodiments

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0041] The battery cell is one of the main components of the battery. In related technologies, a protection board is usually provided on the top of the battery cell to protect the battery cell from damage or explosion risks caused by abnormal situations such as overcharging, over-discharging, and short circuits. However, for batteries in related technologies, when performing drop tests or accidentally dropping during use, components on the top of the battery cell such as the protection board may be damaged due to impacts.

[0042] Based on this, the present utility model provides a battery. By providing a plastic injection structure at the top of the battery cell, at least components at the top of the battery cell such as the ear, the top sealing edge, the main board of the protection board, and part of the flexible circuit board are protected by the plastic injection structure, thereby avoiding the situation where components are damaged due to impact. At the same time, a groove is formed at the position corresponding to the output end of the flexible circuit board of the plastic injection structure. By designing the size of the groove, sufficient space for movement of the flexible circuit board is ensured, thereby facilitating bending of the flexible circuit board and realizing adjustment of the specific position of the output end of the flexible circuit board.

[0043] The following combines the accompanying drawings to detail the battery provided by the present utility model through specific embodiments:

[0044] This embodiment provides a battery, which can be, for example, a lithium-ion battery. The battery can be used as a power source or an energy storage unit of an electronic device. The electronic device can be, but is not limited to, a mobile device (such as a mobile phone, a laptop computer, a tablet computer, etc.), an electric vehicle (such as a pure electric vehicle, a hybrid electric vehicle, an electric bicycle, etc.).

[0045] Referring to Figures 1 to 11 as shown, the battery provided in this embodiment includes: a battery cell 1, a protection board 2, and a plastic injection structure 3.

[0046] The battery cell 1 specifically includes: a battery cell main body, a housing 11, and an ear 12. Among them, the battery cell main body is located inside the housing 11, and the ear 12 is connected to the battery cell main body.

[0047] Referring to Figure 1 as shown, the housing 11 can specifically include a housing main body, a top sealing edge 111, and a side sealing edge 112. The housing main body wraps the battery cell main body. Both the side sealing edge 112 and the top sealing edge 111 extend from the housing main body. The top sealing edge 111 extends from the top surface of the housing main body, and the side sealing edge 112 extends from the side surface of the housing main body. Exemplarily, the battery cell 1 has two ears 12. Both of the two ears 12 extend from the top sealing edge 111 to the outside of the housing 11. Among them, the housing 11 can be, for example, an aluminum-plastic film housing.

[0048] Combining Figure 1 and Figure 2 as shown, during encapsulation, the top sealing edge 111 and the side sealing edge 112 need to be folded. That is, the top sealing edge 111 is bent towards the top surface direction of the battery cell 1. For example, the top sealing plate is fixed on the top surface of the battery cell 1 by bending and applying glue or double-sided tape. Similarly, the side sealing edge 112 is bent towards the side surface direction of the battery cell 1 and is fixed on the side surface of the battery cell 1 by bending and applying glue or double-sided tape.

[0049] Combining Figure 3As shown, the protection plate 2 is specifically located at the top of the battery cell 1. The protection plate 2 is connected to the tab 12 and is used to connect to an external electrical device to achieve the switching of the battery cell 1. The protection plate 2 can be used to protect the battery cell 1 from damage or explosion risks caused by abnormal conditions such as overcharging, overdischarging, and short circuit.

[0050] The protection plate 2 includes a main board 21 located on a side of the top sealing edge 111 away from the battery cell 1 and at least one flexible printed circuit (FPC) 22 connected to the main board 21 .

[0051] For example, the main board 21 has a welding position, and the tab 12 is welded to the welding position. After the protection board 2 and the tab 12 are welded, the protection board 2 and the tab 12 are turned over. Figure 3 and Figure 4 As shown, the protection plate 2 is located on the side of the top sealing edge 111 facing away from the battery cell 1 .

[0052] Reference Figure 8 As shown, in a specific implementation, a first insulating member 4 may be provided between the protection plate 2 and the top sealing edge 111 to prevent the protection plate 2 from contacting other components and causing a short circuit. In addition, a second insulating member 5 may be provided at the bottom of the battery cell 1 to insulate and protect the bottom of the battery cell 1. The first insulating member 4 and the second insulating member 5 may both be insulating tape, for example.

[0053] The injection molding structure 3 at least covers the tab 12, the top sealing edge 111, the main board 21 and part of the flexible circuit board 22. The output end 221 of the flexible circuit board 22 is located outside the injection molding structure 3, and a groove 31 is formed at the position where the corresponding output end 221 of the injection molding structure 3 extends, and at least part of the output end 221 is located in the groove 31.

[0054] That is to say, the injection molding structure 3 is formed on the top of the battery cell 1 by injection molding to insulate and protect at least the tabs 12, the top sealing edge 111, the main board 21 and part of the flexible circuit board 22 to prevent the battery from being damaged by impact or the like.

[0055] Specifically, the output terminal 221 of the flexible circuit board 22 is connected to an external device. Figures 6 to 10As shown, the output end 221 of the flexible circuit board 22 may specifically include a first connection segment 223, a bending segment 224, a second connection segment 225, and a connector 222. Among them, the first connection segment 223 is connected to the main board 21, the bending segment 224 is connected between the first connection segment 223 and the second connection segment 225, and the connector 222 is connected to the second connection segment 225. The protection board 2 is electrically connected to an external device through the connector 222. Specifically, during implementation, after injection molding, it is necessary to adjust the specific position of the connector 222 to achieve reliable and convenient connection between the connector 222 and the external device. Specifically, by adjusting the position of the bending part of the output end 221 of the flexible circuit board 22, the specific position of the connector 222 is adjusted.

[0056] Among them, a groove 31 is formed at the position where the injection plastic structure body 3 extends corresponding to the output end 221 of the flexible circuit board 22, so that at least a part of the output end 221 is located in the groove 31, thereby realizing the adjustment of the position of the bending part of the flexible circuit board 22, and further realizing the adjustment of the position of the connector 222 of the output end 221 of the flexible circuit board 22.

[0057] If the groove width of the groove 31 in the first direction is too small, when adjusting the bending part of the flexible circuit board 22, the moving space of the flexible circuit board 22 is small, resulting in difficulty in bending the flexible circuit board 22. Based on this, referring to Figure 6 and Figure 7 As shown, in this embodiment, the minimum groove width L of the groove 31 in the first direction is set to be not less than 2 mm. Exemplarily, the minimum groove width L of the groove 31 can be, for example, 2 mm, 2.2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm.

[0058] It should be noted that the first direction may specifically be the Figure 6 and Figure 7 left - right direction, for example, it can be the width direction of the battery cell 1. The groove width L of the groove 31 is specifically the dimension of the groove 31 in the left - right direction.

[0059] It can be understood that in some feasible implementation manners, in the direction from the groove opening to the groove bottom of the groove 31, the groove width of the groove 31 can be the same. At this time, the minimum groove width of the groove 31 in the first direction is the groove width of the groove 31 in the first direction. In other feasible implementation manners, referring to Figure 7 As shown, in the direction from the groove opening to the groove bottom of the groove 31, the groove width of the groove 31 can also be different. For example, in the direction from the groove opening to the groove bottom of the groove 31, the groove width of the groove 31 gradually decreases. At this time, the minimum groove width L of the groove 31 in the first direction is the width of the groove bottom of the groove 31 in the first direction.

[0060] Through the above settings, it can be further ensured that the bending starting point of the output end 221 of the flexible circuit board 22 can be at any position of the groove 31, so that the groove 31 can be compatible with more redundant sizes of the flexible circuit board 22, increasing the active space of the flexible circuit board 22, facilitating the bending adjustment of the flexible circuit board 22, etc., and improving the production efficiency.

[0061] If the groove depth of the groove 31 in the second direction is too small, it will cause the groove 31 to be unable to effectively accommodate the bent portion of the output end 221 of the flexible circuit board 22, resulting in the output end 221 of the flexible circuit board 22 protruding from the top surface of the injection-molded plastic structure 3 more, and thus occupying more battery thickness space. Based on this, continue to refer to Figure 7 As shown, the groove depth W of the groove 31 in the second direction can be set to not less than 0.5 mm. Exemplarily, the groove depth W can be, for example, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm.

[0062] It should be noted that the second direction here can specifically be Figure 7 the up-and-down direction in

[0063] such as the length direction of the battery cell 1. The groove depth W here is specifically the depth dimension of the groove 31 in the up-and-down direction.

[0064] The battery provided in this embodiment protects at least components such as the ear 12, the top sealing edge 111, the main board 21 of the protection board 2, and part of the flexible circuit board 22 at the top of the battery cell 1 by arranging an injection molding structure body 3 at the top of the battery cell 1, avoiding damage to components at the top of the battery cell 1 such as the protection board 2 due to impacts (such as during a drop test). At the same time, a groove 31 is formed at the position corresponding to the output end 221 of the flexible circuit board 22 in the injection molding structure body 3, that is, at least the bending point of the flexible circuit board 22 is located within the groove 31, facilitating the bending of the flexible circuit board 22 according to actual conditions to adjust the specific position of the output end 221; moreover, the minimum groove width of the groove 31 in the first direction is not less than 2 mm, so that the groove 31 can accommodate more redundant sizes of the flexible circuit board 22, further ensuring that the flexible circuit board 22 has sufficient movement space, making it more convenient to bend and adjust the flexible circuit board 22, and improving production efficiency. In addition, the groove depth of the groove 31 in the second direction is set to be not less than 0.5 mm. While further ensuring that the flexible circuit board 22 has sufficient movement space, the groove 31 can at least protect and accommodate and hide the bending part of the output end 221 of the flexible circuit board to avoid damage caused by compression due to the bending part of the output end 221 of the flexible circuit board protruding too much from the plane where the notch of the groove 31 is located; in addition, such a setting can reduce the occupied space of the flexible circuit board 22 in the length direction of the battery cell 1, thereby reducing the volume of the entire battery, and thus improving the energy density of the battery.

[0065] That is to say, the battery provided by the present utility model can not only effectively protect components such as the protection board 2 at the top of the battery cell 1, reducing the risk of component damage due to impacts to a certain extent; at the same time, it ensures that the flexible circuit board 22 has sufficient active space, facilitating flexible adjustment of the position of the output end 221 of the flexible circuit board 22, and can also better accommodate and hide the bending part of the flexible circuit board 22 to avoid damage caused by compression. In addition, the energy density of the battery is improved.

[0066] For example, as shown in FIG. 6, the protection board 2 includes two flexible circuit boards 22, the two flexible circuit boards 22 are respectively connected to the main board 21 and are arranged on both sides of the main board 21 along the first direction. Exemplarily, for example, the flexible circuit board 22 on the right side outputs from the positive extreme of the battery cell 1, and the flexible circuit board 22 on the left side outputs from the negative extreme of the battery cell 1. A groove 31 is respectively arranged at the position corresponding to the output end 221 of each flexible circuit board 22 on the injection molding structure body 3, and each output end 221 extends into the corresponding groove 31.

[0067] By arranging two flexible circuit boards 22, the overcurrent capacity of the battery can be improved, the internal resistance of the battery can be reduced, and thus the temperature rise of the battery can be reduced, improving the performance such as the rate of the battery.

[0068] For another example, referring to Figures 8 to 11 as shown, the protection board 2 includes a flexible circuit board 22, and the flexible circuit board 22 outputs, for example, from the positive electrode end of the battery cell 1. The injection-molded plastic structure 3 has a groove 31 at the position corresponding to the output end 221 of the flexible circuit board 22 for the output end 221 to protrude.

[0069] Referring to Figure 7 as shown, in some embodiments, the groove 31 may specifically include: a first side groove wall 311 and a groove bottom wall 313 connected to one end of the first side groove wall 311 close to the top sealing edge 111, and the output end 221 extends into the groove 31 from the first side groove wall 311. Among them, one end of the first side groove wall 311 close to the top sealing edge 111 may specifically be Figure 7 the bottom end of the first side groove wall 311 in

[0070] In specific implementation, if the angle between the first side groove wall 311 and the groove bottom wall 313 is too small, such as an acute angle, it will cause difficulty in demolding after injection molding, and the mold will interfere with other components after injection molding. However, if the angle between the first side groove wall 311 and the groove bottom wall 313 is too large, it will cause a reduction in the thickness of the injection-molded plastic above the protection board 2, easily resulting in missing glue and leaking plates, thereby affecting the insulation effect and the protection effect on the protection board 2, etc.

[0071] Based on this, referring to Figure 7 as shown, in some embodiments, the angle a between the first side groove wall 311 and the groove bottom wall 313 may specifically be set between 90° and 100°.

[0072] That is to say, referring to Figure 7 as shown, the first side groove wall 311 can be set perpendicular to the groove bottom wall 313, or the first side groove wall 311 can be inclined and extended to the left, and the included angle a of the inclination is not greater than 100°. Exemplarily, the included angle a can be, for example, 90°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, 100°.

[0073] Such a setting not only ensures the thickness of the injection-molded plastic above the protection board 2, thus ensuring the insulation effect and the protection effect, but also ensures the smoothness of demolding, and further increases the internal space of the groove 31, and further enables the flexible circuit board 22 to have a sufficiently large activity space, facilitating production and assembly.

[0074] Continuing to refer to Figure 7 as shown, in some embodiments, the width of the notch of the groove 31 in the first direction is greater than the width of the bottom of the groove 31 in the first direction, and the width L of the groove bottom wall 313 in the first direction is not less than 2 mm.

[0075] That is to say, by making the minimum groove width of the groove 31 not less than 2 mm, the internal space of the groove 31 is further ensured, and further, it is ensured that the groove 31 can accommodate more redundant dimensions of the flexible circuit board 22, and further, it is ensured that the flexible circuit board 22 has sufficient movement space.

[0076] Refer to Figures 2 to 5 As shown, at least one side of the top sealing edge 111 in the first direction is formed with a sealing edge convex corner 113. Wherein, the first direction can specifically be Figure 2 and Figure 3 the left - right direction in , for example, sealing edge convex corners 113 are formed on both the left side and the right side of the top sealing edge 111 in the first direction.

[0077] By setting the sealing edge convex corner 113, the insulation protection of the corner position of the battery cell main body can be improved to a certain extent. Exemplarily, the sealing edge convex corner 113 can be formed jointly by the top sealing edge 111 and the side sealing edge 112, that is, after the top sealing edge 111 and the side sealing edge 112 are folded, the sealing edge convex corner 113 is formed at the joint of the two.

[0078] Refer to Figures 6 to 11 As shown, the injection - molded plastic structure body 3 also covers the sealing edge convex corner 113. That is to say, the injection - molded plastic structure can also protect the sealing edge convex corner 113 at the same time, thereby realizing the insulation of the sealing edge convex corner 113, avoiding the occurrence of short - circuit and other situations caused by the contact of the sealing edge convex corner 113 with other components, and also realizing the protection of the sealing edge convex corner 113, avoiding the situation that the sealing edge convex corner 113 is damaged by external force extrusion.

[0079] Continue to refer to Figures 6 to 10 As shown, an injection - molded convex platform 32 is formed in the area of the injection - molded plastic structure body 3 corresponding to covering the sealing edge convex corner 113. Wherein, the groove 31 further includes a second side groove wall 312 opposite to the first side groove wall 311, one end of the second side groove wall 312 close to the top sealing plate is connected to the groove bottom wall 313, and one side of the injection - molded convex platform 32 facing the output end 221 is formed as the second side groove wall 312.

[0080] By setting the injection - molded convex platform 32, one side of the injection - molded convex platform 32 facing the output end 221 is formed as the second side groove wall 312 of the groove 31, thereby realizing better protection for the flexible circuit board 22 in the groove 31.

[0081] Refer to Figure 7 As shown, in some embodiments, the width D of the top surface of the injection - molded convex platform 32 in the first direction is not less than 1.5 mm. The width D here is the width of the top surface of the injection - molded convex platform 32 in the Figure 7Dimensions in the left - right direction. Exemplarily, the width D can be, for example, 1.5 mm, 1.55 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, etc.

[0082] By setting the width D to be not less than 1.5 mm, to a certain extent, it ensures that the top surface of the injection - molded boss 32 has sufficient width, thereby ensuring the protection strength of the injection - molded plastic at the injection - molded boss 32 against the edge - sealing convex corner 113, and further improving the strength, insulation, and overall stability of the edge - sealing convex corner 113.

[0083] Refer to Figure 4 and Figure 5 As shown, in some embodiments, the height h of the side of the output terminal 221 close to the top edge - sealing 111 is not higher than the height H of the top surface of the edge - sealing convex corner 113.

[0084] Here, the side of the output terminal 221 close to the top edge - sealing 111 can specifically be Figure 5 the bottom surface of the output terminal 221 in . Among them, the height h of the side of the output terminal 221 close to the top edge - sealing 111 can specifically be the vertical distance between the bottom surface of the output terminal 221 and the top surface after the top edge - sealing 111 is folded. Among them, the height H of the top surface of the edge - sealing convex corner 113 can specifically be the vertical distance between the top surface of the edge - sealing convex corner 113 and the top surface after the top edge - sealing 111 is folded.

[0085] In this case, the area of the injection - molded plastic structure 3 corresponding to covering the edge - sealing convex corner 113 can specifically form the above - mentioned injection - molded boss 32.

[0086] Continue to refer to Figure 6 and Figure 7 As shown, in some embodiments, the included angle b between the second side groove wall 312 and the groove bottom wall 313 can be set between 90° and 150°.

[0087] That is to say, the side groove wall of the injection - molded boss 32 facing the groove 31 can be set perpendicular to the groove bottom wall 313, or in the direction from bottom to top in Figure 7 , the side groove wall of the injection - molded boss 32 facing the groove 31 extends outwardly obliquely, and the inclination angle is not greater than 150°.

[0088] Exemplarily, the included angle b can be, for example, 90°, 95°, 100°, 110°, 115°, 117.5°, 120°, 130°, 135°, 140°, 145°, 150°.

[0089] Such a setting not only ensures the effective encapsulation of the edge-sealing convex corner 113 by the injection molding plastic, but also further increases the internal space of the groove 31, providing a more relaxed space for the bending adjustment of the flexible circuit board 22, so as to facilitate the bending adjustment of the flexible circuit board 22. Moreover, by setting the angle of the second side groove wall 312 within the above range, it is beneficial to demold after the injection molding is completed, avoiding interference of the mold during demolding and ensuring the smoothness of demolding.

[0090] Further specifically, the included angle between the second side groove wall 312 and the groove bottom wall 313 can be set between 95° and 140°, so as to further ensure the movement space of the flexible circuit board 22, ensure the encapsulation effect of the injection molding plastic on the edge-sealing convex corner 113, and further ensure the smoothness of demolding.

[0091] In some embodiments, the height of the surface of the output end 221 close to the top edge seal 111 is higher than the height of the top surface of the edge-sealing convex corner 113. Combining Figure 5 As shown, the surface of the output end 221 close to the top edge seal 111 here can specifically be Figure 5 the bottom surface of the output end 221 in . Among them, the height h of the surface of the output end 221 close to the top edge seal 111 can specifically be the vertical distance between the bottom surface of the output end 221 and the top surface after the top edge seal 111 is folded. Among them, the height H of the top surface of the edge-sealing convex corner 113 can specifically be the vertical distance between the top surface of the edge-sealing convex corner 113 and the top surface after the top edge seal 111 is folded.

[0092] In this case, the area of the injection molding plastic structure 3 corresponding to encapsulating the edge-sealing convex corner 113 can form the above-mentioned injection molding boss 32. For example, the height of the injection molding boss 32 formed in this case is lower in the up and down direction. Thus, while ensuring the effective encapsulation effect of the injection molding plastic on the edge-sealing convex corner 113, it is possible to avoid the situation of excessive injection molding plastic in the area corresponding to the edge-sealing convex corner 113, resulting in waste of the colloid.

[0093] Exemplarily, the included angle between the top surface of the area of the injection molding plastic structure 3 encapsulating the edge-sealing convex corner 113 and the horizontal plane can be in the range of -10° to 10°. For example, the included angle between the top surface of the injection molding boss 32 and the horizontal plane is in the range of -10° to 10°. Exemplarily, the included angle here can be, for example, -10°, -5°, 0°, 5°, 10°.

[0094] Of course, in this case, the area of the injection molding plastic structure 3 corresponding to encapsulating the edge-sealing convex corner 113 may not form the injection molding boss 32 either. Specifically, the height of the top surface of the area of the injection molding plastic structure 3 encapsulating the edge-sealing convex corner 113 may not be higher than the height of the groove bottom wall 313.

[0095] Exemplarily, referring to Figure 11As shown, the height of the top surface of the region of the injection-molded plastic structure 3 that wraps around the edge-sealing convex corner 113 is flush with the height of the bottom wall 313 of the groove.

[0096] Through the above settings, while ensuring the effective wrapping effect of the injection-molded plastic on the edge-sealing convex corner 113, it avoids the situation of excessive injection-molded plastic in the corresponding area of the edge-sealing convex corner 113, resulting in waste of the colloid, and reduces the production cost.

[0097] Since the size of the injection-molded boss 32 is relatively small, that is, the force-bearing area is relatively small. If the height of the top surface of the injection-molded boss is relatively high, when the battery cell 1 is under pressure (such as during the battery cell reliability test), it is easy to cause overpressure on the injection-molded boss and the edge-sealing convex corner 113, resulting in an increase in the force on the side of the battery cell in the length direction of the battery cell, and further causing deformation and damage to the injection-molded boss 32, the edge-sealing convex corner 113, the side edge-sealing 112, etc. Based on this, in some embodiments, referring to Figure 6 As shown, the flexible circuit board 22 is disposed on at least one side of the protection board 2 in the first direction, and the height X1 of the top surface of at least the region of the injection-molded plastic structure 3 that wraps around the main board 21 is not lower than the height X2 of the top surface of the injection-molded boss 32.

[0098] The specific first direction here is Figure 6 the up-down direction in

[0099] For example, it can be the length direction of the battery cell 1. Among them, the height X1 of the top surface of at least the region of the injection-molded plastic structure 3 that wraps around the main board 21 can specifically be the vertical distance between the top surface of the region of the injection-molded plastic structure 3 that wraps around the main board 21 and the bottom surface of the battery cell 1. Among them, the height X2 of the top surface of the injection-molded boss 32 can specifically be the vertical distance between the top surface of the injection-molded boss 32 and the bottom surface of the battery cell 1. Figure 6 Exemplarily, the main board 21 is located in the middle region in the left-right direction along the Figure 6 top of the battery cell 1, and there are two flexible circuit boards 22. The two flexible circuit boards 22 are located on both sides of the main board 21 in the left-right direction along the

[0100] Through the above settings, it can effectively avoid the situation of overpressure on the edge-sealing convex corner 113 and the injection-molded boss 32 when the battery cell 1 is under pressure, and further avoid the situation of excessive force on the side of the battery cell in the length direction of the battery cell, resulting in edge-sealing damage, etc., and ensures the stability and life of the battery cell 1.

[0101] In this text, it should be noted that unless otherwise clearly stipulated and defined, the terms "install", "connect", and "link" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, and can be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0102] In this text, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0103] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery, characterized in that, It comprises a battery cell (1), a protection plate (2) and an injection-molded plastic structure (3); The battery cell (1) comprises a pole ear (12) and a top sealing edge (111), wherein the pole ear (12) extends out from the top sealing edge (111); the protection plate (2) is connected to the pole ear (12), and the protection plate (2) comprises a main board (21) located on a side of the top sealing edge (111) away from the battery cell (1) and at least one flexible circuit board (22) connected to the main board (21); The injection molding structure (3) at least covers the pole ear (12), the top sealing edge (111), the main board (21) and part of the flexible circuit board (22); the output end (221) of the flexible circuit board (22) is located outside the injection molding structure (3); a groove (31) is formed at a position of the injection molding structure (3) corresponding to the protruding position of the output end (221); and at least part of the output end (221) is located in the groove (31); The minimum groove width of the groove (31) in the first direction is not less than 2 mm, and the groove depth of the groove (31) in the second direction is not less than 0.5 mm.

2. The battery according to claim 1, wherein The groove (31) comprises a first side groove wall (311) and a groove bottom wall (313) connected to an end of the first side groove wall (311) close to the top sealing edge (111), and the output end (221) extends from the first side groove wall (311) into the groove (31).

3. The battery according to claim 2, characterized in that, The included angle between the first side groove wall (311) and the groove bottom wall (313) is in the range of 90° to 100°; And / or, the slot width of the groove (31) along the first direction is greater than the slot bottom width of the groove (31) along the first direction, and the width of the slot bottom wall (313) in the first direction is not less than 2 mm.

4. The battery according to claim 2, characterized in that, The top edge seal (111) is formed with an edge seal convex corner (113) on at least one side along the first direction, and the injection molding structure (3) also covers the edge seal convex corner (113).

5. The battery according to claim 4, characterized in that, The area of the injection molding structure (3) corresponding to the edge sealing convex corner (113) forms an injection molding boss (32); The groove (31) further comprises a second side groove wall (312) arranged opposite to the first side groove wall (311); an end of the second side groove wall (312) close to the top sealing edge (111) is connected to the groove bottom wall (313); and a side of the injection molding boss (32) facing the output end (221) is formed as the second side groove wall (312).

6. The battery according to claim 5, characterized in that, The width of the top surface of the injection molding boss (32) along the first direction is not less than 1.5 mm.

7. The battery according to claim 5, characterized in that, The height of a surface of the output end (221) close to the top edge seal (111) is not higher than the height of the top surface of the edge seal convex corner (113); And / or, the angle between the second side groove wall (312) and the groove bottom wall (313) is in the range of 90° to 150°.

8. The battery according to claim 7, wherein, The included angle between the second side groove wall (312) and the groove bottom wall (313) ranges from 95° to 140°.

9. The battery according to any one of claims 4 to 6, characterized in that The height of the surface of the output end (221) near the top sealing edge (111) is higher than the height of the top surface of the sealing edge convex corner (113); and / or, the included angle range between the top surface of the area of the injection-molded plastic structure (3) covering the sealing edge convex corner (113) and the horizontal plane is -10° to 10°; and / or, the height of the top surface of the area of the injection-molded plastic structure (3) covering the sealing edge convex corner (113) is not higher than the height of the groove bottom wall (313).

10. The battery according to any one of claims 5 to 8, characterized in that, The flexible circuit board (22) is arranged on at least one side of the main board (21) along the first direction; The height of the top surface of at least the area of the injection-molded plastic structure (3) covering the main board (21) is not lower than the height of the top surface of the injection-molded boss (32).

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