Battery

Abstract

Battery, characterized in that it comprises a cell (1), a protective plate (2) and an injection-molded plastic structure (3), wherein the cell (1) has tabs (12) and an upper edge seal (111), wherein the tabs (12) each protrude from the upper edge seal (111), wherein the protective plate (2) is connected to the tabs (12) and the protective plate (2) comprises a main plate (21) on a side of the upper edge seal (111) facing away from the cell (1) and at least one flexible circuit board (22) connected to the main plate (21), wherein the injection-molded plastic structure (3) encloses at least the tabs (12), the upper edge seal (111), the main plate (21) and a part of the flexible circuit board (22), wherein an exit (221) of the flexible circuit board (22) is located outside the injection-molded plastic structure (3) and a recess (31) is formed at a location of the injection-molded plastic structure (3) corresponding to the location at which the exit (221) protrudes, wherein the exit (221) is at least partially located in the recess (31), and wherein the recess (31) has a minimum recess width of not less than 2 mm in a first direction and the recess (31) has a recess depth of not less than 0.5 mm in a second direction.

Description

Technical area

[0001] The present utility model relates to the technical field of batteries and in particular to a battery. State of the art

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

[0003] As one of the essential components of a battery, a cell in the prior art is typically provided with a protective plate on its top surface to protect the cell from the risk of damage or explosion due to overcharging, overdischarging, short circuiting, or other abnormalities. However, in prior art batteries, elements on the top surface of the cell, such as the protective plate, can be damaged by impacts, for example, during a drop test. Disclosure of the utility model

[0004] In view of the above, an embodiment of the present utility model aims to provide a battery that protects at least elements on the top of the cell, such as the protective plate, and promotes position adjustment for an output of a protective plate.

[0005] The present utility model provides a battery comprising a cell, a protective plate and an injection-molded plastic structure. wherein the cell has tabs and an upper edge seal, the tabs each projecting from the upper edge seal, the protective plate being connected to the tabs, and the protective plate comprising a main plate on a side of the upper edge seal facing away from the cell and at least one flexible circuit board connected to the main plate, wherein the injection-molded plastic structure encloses at least the tabs, the upper edge seal, the main plate and a part of the flexible circuit board, wherein an exit of the flexible circuit board is located outside the injection-molded plastic structure and a recess is formed at a location of the injection-molded plastic structure corresponding to the location at which the exit protrudes, wherein the exit is at least partially located in the recess, and wherein the recess in a first direction has a minimum recess width of not less than 2 mm and the recess in a second direction has a recess depth of not less than 0.5 mm.

[0006] Optionally, it is provided that the recess comprises a first recess flank and a recess bottom wall which is connected to an end of the first recess flank facing the upper edge seal, wherein the outlet projects into the recess via the first recess flank.

[0007] Optionally, an angle of 90° to 100° is included between the first recess flank and the recess bottom wall; and / or that the opening width of the recess in the first direction is greater than the width of the bottom of the recess in the first direction, wherein the width of the recess bottom wall in the first direction is not less than 2 mm.

[0008] Optionally, the upper edge seal is provided with a convex corner of the edge seal on at least one side in the first direction, wherein the injection-molded plastic structure also envelops the convex corner of the edge seal.

[0009] Optionally, an injection-molded shoulder is provided in the respective area of ​​the injection-molded plastic structure that envelops the convex corner of the edge seal; and that the recess further comprises a second recess flank arranged opposite the first recess flank, wherein an end of the second recess flank facing the upper edge seal is connected to the recess bottom wall, and wherein a side of the injection molding shoulder facing the exit is formed as the second recess flank.

[0010] Optionally, the injection-molded shoulder is provided to have a width in the first direction of not less than 1.5 mm on its upper surface.

[0011] Optionally, a surface of the outlet facing the upper edge seal is provided at a height not greater than that of the upper surface of the convex corner of the edge seal; and / or that an angle of 90° to 150° is enclosed between the second recess flank and the recess bottom wall.

[0012] Optionally, the angle between the second recess flank and the recess bottom wall is in the range of 95° to 140°.

[0013] Optionally, a surface of the outlet facing the upper edge seal is at a height greater than that of the upper surface of the convex corner of the edge seal; and / or that an angle of -10° to 10° is included between an upper surface of the region of the injection-molded plastic structure which envelops the convex corner of the edge seal and the horizontal; and / or that the upper surface of the portion of the injection-molded plastic structure enveloping the convex corner of the edge seal is at a height no greater than that of the recess bottom wall.

[0014] Optionally, the flexible circuit board is arranged on at least one side of the protective plate in the first direction; and that an upper surface of a portion of the injection-molded plastic structure enveloping at least the main plate is at a height not lower than that of the upper surface of the injection-molded shoulder.

[0015] By arranging the injection-molded plastic structure on top of the cell in the battery of the present utility model, at least the elements on top of the cell, such as the tab, the top edge seal, the main plate on the protective plate, and part of the flexible circuit board, are protected by the injection-molded plastic structure. This prevents the elements on top of the cell, such as the protective plate, from being damaged by impacts (e.g., during a drop test) or the like.

[0016] Furthermore, the recess at the location of the injection-molded plastic structure associated with the flexible circuit board's exit is formed such that at least one starting point of the flexible circuit board's bending lies within the recess. This facilitates the flexible circuit board's bending according to the actual situation to adjust the specific exit position. By setting the minimum recess width of the recess in the first direction to no less than 2 mm, it is also possible to adjust the recess to a larger redundant dimension of the flexible circuit board. This further ensures sufficient movement space for the flexible circuit board. This, in turn, facilitates the adjustment of the flexible circuit board's bending and thus increases production efficiency.

[0017] By setting the recess depth of the recess in the second direction to not less than 0.5 mm, sufficient movement space for the flexible circuit board is further ensured, while at the same time, the recess is designed to at least protect and to some extent accommodate and conceal the bending point at the exit of the flexible circuit board. This prevents the bending point at the exit of the flexible circuit board from protruding too far beyond the plane of the recess opening and thus being damaged by pressure or the like. Furthermore, this design can reduce the space required by the flexible circuit board in the length direction of the cell, so that the overall battery volume is reduced and the energy density of the battery is increased.

[0018] This means that the battery of the present utility model not only effectively protects the elements on top of the cell, such as the protective plate, but also reduces the risk of damage to these elements due to impact. At the same time, it ensures that the flexible circuit board has sufficient active space. This facilitates flexible adjustment of the position of the flexible circuit board's output and also provides good accommodation and concealment for the flexible circuit board's bending point, thus preventing pressure damage to the bending point and increasing the battery's energy density. Short description of the characters Fig. 1 shows a schematic structural view of a cell according to an embodiment of the present utility model before bending an edge seal; Fig. 2 shows a schematic structural view of the cell according to an embodiment of the present utility model after bending an edge seal; Fig. 3 shows a schematic structural view of the cell according to an embodiment of the present utility model in conjunction with a protective plate; Fig. 4 shows a lateral structural view according to Fig. 3; Fig. 5 shows an enlarged structural view of position I from Fig. 4; Fig. 6 shows a first schematic structural view of a battery according to an embodiment of the present utility model; Fig. Figure 7 shows an enlarged structural view of position I from Fig. 6; Fig. 8 shows a second schematic structural view of the battery according to an embodiment of the present utility model; Fig. 9 shows a schematic exploded structural view of the battery of Fig. 8; Fig. 10 shows an enlarged structural view of position I from Fig. 9; and Fig. 11 shows a third schematic structural view of the battery according to an embodiment of the present utility model.

[0019] List of reference symbols: 1. cell; 11. housing; 111. top edge seal; 112. side edge seal; 113. convex corner of the edge seal; 12. tab; 2. protection plate; 21. main plate; 22. flexible circuit board; 221. output; 222. connector; 223. first connection section; 224. bending section; 225. second connection section; 3. injection-molded plastic structure; 31. recess; 311. first recess flank; 312. second recess flank; 313. recess bottom wall; 32. injection-molded shoulder; 4. first insulating member; 5. second insulating member. Detailed embodiments

[0020] The technical solutions of the embodiments of the present utility model will be explained fully and clearly below with reference to the accompanying drawings in such embodiments. It should be understood that the described embodiments represent only some of the embodiments of the present utility model, rather than all of them. All other embodiments that can be obtained by a person of ordinary skill in the art from the embodiments of the present utility model without inventive steps are also within the scope of the present utility model.

[0021] As one of the essential components of a battery, a cell in the prior art is typically provided with a protective plate on its top surface to protect the cell from the risk of damage or explosion due to overcharging, overdischarging, short circuiting, or other abnormalities. However, in prior art batteries, elements on the top surface of the cell, such as the protective plate, can be damaged, for example, during a drop test or if accidentally dropped during use due to impacts or the like.

[0022] Based on this, the present utility model provides a battery in which an injection-molded plastic structure is arranged on top of a cell, so that at least the elements on the top of the cell, such as a tab, a top edge seal, a main plate on a protective plate, and a part of a flexible circuit board, are protected by the injection-molded plastic structure, thereby preventing these elements from being damaged by impact. Furthermore, a recess is formed at the location of the injection-molded plastic structure associated with an output of the flexible circuit board and is dimensioned such that the flexible circuit board can have sufficient freedom of movement. This facilitates the bending of the flexible circuit board and enables adjustment of the specific position of the output of the flexible circuit board.

[0023] The battery according to the present utility model is described in detail below in connection with the attached figures and using specific embodiments.

[0024] In the present embodiment, a battery is provided, which may be, for example, a lithium-ion battery. The battery can be used as a power source or energy storage unit for electronic devices. These may be, but are not limited to, mobile devices (mobile phones, laptops, tablets, etc.) and electric vehicles (e.g., pure electric cars, hybrid electric cars, electric bicycles, etc.).

[0025] See Fig. 1 to 11. The battery in this embodiment comprises: a cell 1, a protective plate 2 and an injection-molded plastic structure 3.

[0026] The cell 1 comprises in particular: a cell body, a housing 11 and tabs 12. The cell body is located in the housing 11 and the tabs 12 are each connected to the cell body.

[0027] See Fig. 1. The housing 11 can in particular comprise a housing body, an upper edge seal 111, and side edge seals 112, wherein the housing body encloses the cell body. The side edge seals 112 and the upper edge seal 111 each extend from the housing body. In particular, the upper edge seal 111 extends from an upper surface of the housing body, while the side edge seals 112 extend from the side surfaces of the housing body. The cell 1 has, for example, two tabs 12. The two tabs 12 extend from the upper edge seal 111 to the outside of the housing 11. The housing 11 can, for example, be a housing made of aluminum plastic film.

[0028] Combined with Fig. 1 and Fig. 2 During encapsulation, the upper edge seal 111 and the side edge seals 112 must be bent over, i.e., the upper edge seal 111 is bent toward the upper surface of the cell 1, for example, by attaching the upper closure plate to the upper surface of the cell 1 using a bent dispensing technique or with double-sided adhesive tape. Likewise, the side edge seals 112 are bent toward the respective side surface of the cell 1 and attached to the respective side surface of the cell 1, for example, using a bent dispensing technique or with double-sided adhesive tape.

[0029] Combined with Fig. 3, the protective plate 2 is located, in particular, on top of the cell 1. The protective plate 2 is connected to the tabs 12 and thus serves to connect to an external load to bridge the cell 1. The protective plate 2 can be used to protect the cell 1 from the risk of damage or explosion due to overcharging, overdischarging, short circuits, or other anomalies.

[0030] The protective plate 2 comprises a main plate 21 on a side of the upper edge seal 111 facing away from the cell 1 and at least one flexible printed circuit board 22 (FPC for short) connected to the main plate 21.

[0031] For example, it is provided that welding positions are provided in the main plate 21, to which the tabs 12 are welded. After the welding connection of the protective plate 2 with the tabs 12, the protective plate 2 and the tabs 12 are turned over so that the protective plate 2 is located on the side of the upper edge seal 111 facing away from the cell 1, as shown in Fig. 3 and Fig. 4 shown.

[0032] See Fig. 8. In practical implementation, a first insulating element 4 can be arranged between the protective plate 2 and the upper edge seal 111 to prevent a short circuit caused by contact between the protective plate 2 and other components. Additionally, a second insulating element 5 can be arranged on the underside of the cell 1 to provide insulating protection for the underside of the cell 1. For example, both the first insulating element 4 and the second insulating element 5 can be made of insulating adhesive paper.

[0033] The injection-molded plastic structure 3 encloses at least the tabs 12, the upper edge seal 111, the main plate 21 and a part of the flexible circuit board 22. An exit 221 of the flexible circuit board 22 is located outside the injection-molded plastic structure 3. At a location in the injection-molded plastic structure 3 that corresponds to the location at which the exit 221 protrudes, a recess 31 is formed, wherein the exit 221 is at least partially located in the recess 31.

[0034] That is, the injection-molded plastic structure 3 is formed on the top surface of the cell 1 by injection molding to insulate at least the tabs 12, the top edge seal 111, the main plate 21, and a part of the flexible circuit board 22, thus preventing damage to the elements due to impact of the battery or the like.

[0035] In particular, the output 221 of the flexible circuit board 22 is connected to an external device. See Fig. 6 to 10. The output 221 of the flexible printed circuit board 22 can, in particular, comprise a first connecting section 223, a bending section 224, a second connecting section 225, and a connector 222. The first connecting section 223 is connected to the main plate 21, the bending section 224 is connected between the first connecting section 223 and the second connecting section 225, and the connector 222 is connected to the second connecting section 225. The protective plate 2 is, in particular, electrically connected to an external device via the connector 222. In practice, the specific position of the connector 222 must be adjusted after the injection molding process in order to establish a reliable and simple connection between the connector 222 and the external device. To adjust the specific position of the connector 222, in particular, the position of a bending point at the output 221 of the flexible printed circuit board 22 is adjusted.

[0036] Because the recess 31 is formed at the location of the injection-molded plastic structure 3 that corresponds to the location at which the output 221 of the flexible circuit board 22 protrudes, and the output 221 is located at least partially in the recess 31, the position of the bending point of the flexible circuit board 22 and thus the position of the connector 222 of the output 221 of the flexible circuit board 22 is adjusted.

[0037] If the recess 31 has a too small recess width in a first direction, this results in the flexible circuit board 22 having too small a movement space when adjusting the bending point of the flexible circuit board 22, making it difficult to bend the flexible circuit board 22. For this reason, in this embodiment, a minimum recess width L of the recess 31 in the first direction is set to not less than 2 mm, as shown in Fig. 6 and Fig. 7. By way of example, it is provided that the minimum recess width L of the recess 31 can be, for example, 2 mm, 2.2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm or 4.5 mm.

[0038] It should be noted that the first direction is particularly the left-right direction in the Fig. 6 and Fig. 7, such as the width direction of the cell 1. The recess width L of the recess 31 specifically refers to the dimension of the recess 31 in the left-right direction.

[0039] It is understood that in some possible implementations, the recess width of the recess 31 may be constant in the direction from the opening to the bottom of the recess 31. In this case, the above-mentioned minimum recess width of the recess 31 in the first direction corresponds to the recess width of the recess 31 in the first direction. In further possible embodiments, as in Fig. 7, the recess width of the recess 31 may vary in the direction from the opening to the bottom of the recess 31. For example, the recess width of the recess 31 gradually decreases in the direction from the opening to the bottom of the recess 31. In this case, the minimum recess width L of the recess 31 in the first direction corresponds to the width of the bottom of the recess 31 in the first direction.

[0040] This configuration further ensures that a starting point for the bending of the output 221 of the flexible circuit board 22 can be located anywhere in the recess 31. In this way, the recess 31 can be adapted to a larger redundant dimension of the flexible circuit board 22, so that the active space of the flexible circuit board 22 can be increased. This facilitates the adaptation of the bending of the flexible circuit board 22 and thus increases production efficiency.

[0041] If the recess 31 has a recess depth that is too small in a second direction, this results in the recess 31 not being able to effectively accommodate the bending point of the output 221 of the flexible printed circuit board 22. As a result, the output 221 of the flexible printed circuit board 22 protrudes too far beyond an upper surface of the injection-molded plastic structure 3 and occupies too much space in the thickness direction of the battery. For this reason, a recess depth W of the recess 31 in the second direction can be set to not less than 0.5 mm, as further described in Fig. 7. By way of example, it is provided that the recess depth W can be, for example, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm or 0.8 mm.

[0042] It should be noted that the second direction in this case refers in particular to the upward or downward direction in Fig. 7, for example the length direction of the cell 1. The recess depth W in this case refers in particular to the depth dimension of the recess 31 in the upward or downward direction.

[0043] This configuration not only further ensures sufficient movement space 22 for the flexible circuit board, but the recess 31 can also be configured such that it at least protects and, to a certain extent, accommodates and conceals the bending point at the exit 221 of the flexible circuit board 22. This prevents the bending point at the exit 221 of the flexible circuit board 22 from protruding too far beyond the plane of the opening of the recess 31 and thus being damaged by pressure or the like. Furthermore, this configuration can reduce the space required by the flexible circuit board 22 in the length direction of the cell 1, so that the overall battery volume is reduced and the energy density of the battery is increased.

[0044] Because the injection-molded plastic structure 3 is arranged on top of the cell 1 in the battery according to this embodiment, at least the elements on the top of the cell 1, such as the tab 12, the upper edge seal 111, the main plate 21 on the protective plate 2, and a part of the flexible circuit board 22, are protected by the injection-molded plastic structure 3. This prevents the elements on the top of the cell 1, such as the protective plate 2, from being damaged by impacts (for example, during a drop test) or the like. Furthermore, the recess 31 at the location of the injection-molded plastic structure 3 associated with the exit 221 of the flexible circuit board 22 is formed such that at least one starting point of the bending of the flexible circuit board 22 lies in the recess 31. This facilitates the bending of the flexible circuit board 22 depending on the actual situation in order to adapt the specific position of the exit 221.By setting the minimum cutout width of the cutout 31 in the first direction to not less than 2 mm, it is also possible to adapt the cutout 31 to a larger redundant dimension of the flexible circuit board 22. This further ensures sufficient movement space for the flexible circuit board 22. This, in turn, facilitates the adjustment of the bending of the flexible circuit board 22 and thus increases production efficiency. By setting the cutout depth of the cutout 31 in the second direction to not less than 0.5 mm, sufficient movement space for the flexible circuit board 22 is further ensured, while at the same time, the cutout 31 is designed to protect, accommodate, and conceal at least the bending point at the exit 221 of the flexible circuit board to a certain extent.This prevents the bending point at the output 221 of the flexible circuit board from protruding too far beyond the plane of the opening of the recess 31 and thus being damaged by pressure or the like. Furthermore, this design allows the space required by the flexible circuit board 22 in the length direction of the cell 1 to be reduced, thus reducing the overall battery volume and thus increasing the battery's energy density.

[0045] This means that the battery of the present utility model not only effectively protects the elements on top of the cell 1, such as the protective plate 2, but also reduces the risk of damage to these elements due to impact. At the same time, it ensures that the flexible circuit board 22 has sufficient active space. This facilitates flexible adjustment of the position of the output 221 of the flexible circuit board 22 and also provides good accommodation and concealment for the bending point of the flexible circuit board 22, thereby preventing pressure damage to the bending point and also increasing the energy density of the battery.

[0046] For example, Fig. 6 that the protective plate 2 comprises two flexible circuit boards 22, wherein the two flexible circuit boards 22 are each connected to the main plate 21 and distributed on both sides of the main plate 21 in the first direction. By way of example, it is provided that the flexible circuit board 22 forms an output to the right of a positive pole of the cell 1, while the flexible circuit board 22 forms an output to the left of a negative pole of the cell 1. At the locations of the injection-molded plastic structure 3 that are assigned to the outputs 221 of the respective flexible circuit boards 22, a recess 31 is provided in each case, wherein the respective output 221 protrudes into the assigned recess 31.

[0047] By arranging the two flexible circuit boards 22, the overcurrent capacity of the battery can be increased, the internal resistance of the battery can be reduced, so that the temperature rise of the battery is reduced and thus its performance, for example its discharge rate, is improved.

[0048] For example, Fig. 8 to 11 that the protective plate 2 comprises a flexible printed circuit board 22, wherein this flexible printed circuit board 22 forms, for example, an output from the positive pole of the cell 1. At the location of the injection-molded plastic structure 3 that is assigned to the output 221 of the flexible printed circuit board 22, a recess 31 is provided into which the output 221 projects.

[0049] See Fig. 7. In some embodiments, the recess 31 may in particular comprise: a first recess flank 311 and a recess bottom wall 313, which is connected to an end of the first recess flank 311 facing the upper edge seal 111, wherein the outlet 221 projects into the recess 31 via the first recess flank 311. In this case, the end of the first recess flank 311 facing the upper edge seal 111 may in particular be the lower end of the first recess flank 311 in Fig. 7 be.

[0050] In practice, an angle between the first recess flank 311 and the recess bottom wall 313 that is too small, for example, an acute angle, makes demolding after the injection molding process difficult and causes interference between the mold and other components after the injection molding process. However, if the angle between the first recess flank 311 and the recess bottom wall 313 is too large, the thickness of the injection molding material above the protective plate 2 decreases. This can easily lead to the plate being exposed due to a lack of material, which in turn impairs the insulating and protective effect of the protective plate 2.

[0051] For this reason, in some embodiments, the angle a between the first recess flank 311 and the recess bottom wall 313 can be set in particular between 90° and 100°, as in Fig. 7 shown.

[0052] This means that the first recess flank 311, as in Fig. 7, can be arranged perpendicular to the recess bottom wall 313, or that the first recess flank 311 can be inclined to the left at the angle a, namely an inclination angle of no more than 100°. For example, it is provided that the angle a can be, for example, 90°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, or 100°.

[0053] This design not only ensures the thickness of the injection-molded material above the protective plate 2, thus ensuring the insulating and protective effect, but also ensures smooth demolding. Furthermore, the interior of the recess 31 is further enlarged, allowing the flexible printed circuit board 22 to continue to have sufficient movement space, facilitating production and assembly.

[0054] See further Fig. 7. In some embodiments, it is provided that the opening width of the recess 31 in the first direction is greater than the width of the bottom of the recess 31 in the first direction, wherein the width L of the recess bottom wall 313 in the first direction is not less than 2 mm.

[0055] That is, the minimum cutout width of the cutout 31 is set to not less than 2 mm to further ensure the internal space of the cutout 31. This further ensures that the cutout 31 can accommodate a larger redundant dimension of the flexible circuit board 22 and that the flexible circuit board 22 has sufficient movement space.

[0056] See Fig. 2 to 5. The upper edge seal 111 is provided on at least one side in the first direction with a convex corner 113 of the edge seal. The first direction can in particular be the left-right direction in the Fig. 2 and Fig. 3, wherein, for example, the upper edge seal 111 on the left and right sides in the first direction is each provided with a convex corner 113 of the edge seal.

[0057] By arranging the convex corner 113 of the edge seal, the insulation protection at the corners of the cell body can be improved to a certain extent. For example, it is envisaged that the convex corner 113 of the edge seal can be formed jointly by the upper edge seal 111 and the side edge seal 112. This means that after bending the upper edge seal 111 and the side edge seal 112, the convex corner 113 of the edge seal is formed at the junction between them.

[0058] See Fig. 6 to 11. The injection-molded plastic structure 3 also wraps the convex corner 113 of the edge seal. This means that the injection-molded plastic structure can simultaneously protect the convex corner 113 of the edge seal, thus isolating the convex corner 113 of the edge seal and preventing the convex corner 113 of the edge seal from coming into contact with other components and thereby causing a short circuit. Furthermore, the convex corner 113 of the edge seal is protected to prevent the convex corner 113 of the edge seal from being damaged due to external forces.

[0059] See further Fig. 6 to 10. An injection-molded shoulder 32 is formed in the respective region of the injection-molded plastic structure 3 that surrounds the convex corner 113 of the edge seal. The recess 31 further comprises a second recess flank 312 arranged opposite the first recess flank 311, wherein an end of the second recess flank 312 facing the upper closure plate is connected to the recess bottom wall 313, and wherein an end of the injection-molded shoulder 32 facing the outlet 221 is formed as the second recess flank 312.

[0060] Because the end of the injection-molded shoulder 32 facing the outlet 221 is designed as the second recess flank 312 of the recess 31 in the arrangement of the injection-molded shoulder 32, the flexible printed circuit board 22 is better protected within the recess 31.

[0061] See Fig. 7. In some embodiments, the injection-molded shoulder 32 has a width in the first direction D of not less than 1.5 mm on its upper surface. The width D here refers to the dimension of the upper surface of the injection-molded shoulder 32 in the left-right direction in Fig. 7. By way of example, it is provided that the width D can be, for example, 1.5 mm, 1.55 mm, 1.6 mm, 1.7 mm, 1.8 mm or 1.9 mm.

[0062] Setting the width D to no less than 1.5 mm ensures, to a certain extent, that the upper surface of the injection-molded shoulder 32 has a sufficient width. This ensures the protective effect of the injection-molded material on the injection-molded shoulder 32 for the convex corner 113 of the edge seal, which in turn improves the strength, insulation, and overall stability of the convex corner 113 of the edge seal.

[0063] See Fig. 4 and Fig. 5. In some embodiments, it is provided that a surface of the outlet 221 facing the upper edge seal 111 is at a height h which is not greater than the height H of the upper surface of the convex corner 113 of the edge seal.

[0064] In this case, this surface of the outlet 221 facing the upper edge seal 111 can in particular be a lower surface of the outlet 221 in Fig. 5. The height h of the surface of the outlet 221 facing the upper edge seal 111 can be, in particular, a vertical distance between the lower surface of the outlet 221 and the upper surface of the curved upper edge seal 111. The height H of the upper surface at the convex corner 113 of the edge seal can be, in particular, a vertical distance between the upper surface of the convex corner 113 of the edge seal and the upper surface of the curved upper edge seal 111.

[0065] In this case, in particular, the said injection-molded shoulder 32 can be formed in the respective region of the injection-molded plastic structure 3 which encloses the convex corner 113 of the edge seal.

[0066] See further Fig. 6 and Fig. 7. In some embodiments, it is provided that an angle b between the second recess flank 312 and the recess bottom wall 313 can be set between 90° and 150°.

[0067] This means that the recess flank of the injection-molded shoulder 32 facing the recess 31 can be formed perpendicular to the recess bottom wall 313, or that the recess flank of the injection-molded shoulder 32 facing the recess 31 extends in the direction from bottom to top in Fig. 7 extends outwards at an angle of inclination of not more than 150°.

[0068] For example, it is provided that the angle b can be 90°, 95°, 100°, 110°, 115°, 117.5°, 120°, 130°, 135°, 140°, 145° and 150°.

[0069] This not only ensures effective encapsulation of the convex corner 113 of the edge seal by the injection molding material, but also further enlarges the interior space of the recess 31. This creates greater freedom for adjusting the bending of the flexible circuit board 22, in turn facilitating the adjustment of the bending of the flexible circuit board 22. Furthermore, by setting the angle of the second recess flank 312 to the above range, it is advantageous for demolding after the injection molding process, preventing interference during demolding from the mold and ensuring smooth demolding.

[0070] Furthermore, it is provided that the angle between the second recess flank 312 and the recess bottom wall 313 can be adjusted, in particular, between 95° and 140°, so that both the movement space of the flexible printed circuit board 22 and the enveloping effect of the injection molding material for the convex corner 113 of the edge seal as well as the smoothness of the demolding are further ensured.

[0071] In some embodiments, it is provided that a surface of the outlet 221 facing the upper edge seal 111 is at a height that is greater than the height of the upper surface of the convex corner 113 of the edge seal. See Fig. 5. In this case, this surface of the outlet 221 facing the upper edge seal 111 can in particular be a lower surface of the outlet 221 in Fig. 5. The height h of the surface of the outlet 221 facing the upper edge seal 111 can be, in particular, a vertical distance between the lower surface of the outlet 221 and the upper surface of the curved upper edge seal 111. The height H of the upper surface at the convex corner 113 of the edge seal can be, in particular, a vertical distance between the upper surface of the convex corner 113 of the edge seal and the upper surface of the curved upper edge seal 111.

[0072] Here, the aforementioned injection-molded shoulder 32 can be formed in the respective region of the injection-molded plastic structure 3 that envelops the convex corner 113 of the edge seal, wherein, for example, the injection-molded shoulder 32 thus formed has a smaller height in the upward and downward directions. This ensures an effective enveloping effect of the injection-molded material for the convex corner 113 of the edge seal and also prevents excessive injection-molded material in the corresponding region of the convex corner 113 of the edge seal from leading to material waste.

[0073] By way of example, it is provided that an angle of -10° to 10° can be enclosed between the upper surface of the region of the injection-molded plastic structure 3 that surrounds the convex corner 113 of the edge seal and the horizontal. For example, the angle of -10° to 10° is enclosed between the upper surface of the injection-molded shoulder 32 and the horizontal. By way of example, it is provided that this angle can be, for example, -10°, -5°, 0°, 5°, or 10°.

[0074] It is of course also possible for the injection-molded shoulder 32 not to be formed in the region of the injection-molded plastic structure 3 that surrounds the convex corner 113 of the edge seal. In particular, it can be provided that the upper surface of the region of the injection-molded plastic structure 3 that surrounds the convex corner 113 of the edge seal lies at a height that is no greater than that of the recess bottom wall 313.

[0075] By way of example, as shown in Fig. 11, the height of the upper surface of the portion of the injection-molded plastic structure 3 that wraps around the convex corner 113 of the edge seal is flush with the height at which the recess bottom wall 313 lies.

[0076] This design ensures an effective enveloping effect of the injection molding material for the convex corner 113 of the edge seal and also prevents excessive injection molding material in the corresponding area of ​​the convex corner 113 of the edge seal from causing material waste. This reduces production costs.

[0077] The dimensions of the injection-molded shoulder 32 are relatively small, meaning it has a comparatively small pressure area. If the upper surface of the injection-molded shoulder is at a relatively high height, overpressure easily develops at the injection-molded shoulder and the convex corner 113 of the edge seal when the cell 1 is pressurized, for example, during a reliability test. This leads to increased force loading on the sides of the cell in its longitudinal direction, which in turn causes deformation and thus damage to the injection-molded shoulder 32, the convex corner 113 of the edge seal, and the side edge seals 112, etc.For this reason, in some embodiments, it is provided that the flexible circuit board 22 is arranged on at least one side of the protective plate 2 in the first direction, wherein an upper surface of a portion of the injection-molded plastic structure 3 enveloping at least the main plate 21 is at a height X1 which is not lower than the height X2 of the upper surface of the injection-molded shoulder 32, as shown in FIG. Fig. 6 shown.

[0078] The first direction in this case represents in particular the upward or downward direction in Fig. 6, for example, the length direction of the cell 1. The height X1 of the upper surface of the region of the injection-molded plastic structure 3 that encloses at least the main plate 21 can be, in particular, a vertical distance between the upper surface of the region of the injection-molded plastic structure 3 that encloses the main plate 21 and the lower surface of the cell 1. The height X2 of the upper surface of the injection-molded shoulder 32 can be, in particular, a vertical distance between the upper surface of the injection-molded shoulder 32 and the lower surface of the cell 1.

[0079] For example, it is provided that the main plate 21 is located in a central area in the left-right direction in Fig. 6 is located on the top side of the cell 1; and that two flexible circuit boards 22 are provided, wherein the two flexible circuit boards 22 are each located on both sides of the main plate 21 in the left-right direction in Fig.6. An upper surface of the central region of the injection-molded plastic structure 3 is at a height which is not lower than that of the upper surfaces of the individual injection-molded shoulders 32 on the two sides.

[0080] This effectively prevents overpressure at the convex corner 113 of the edge seal and the injection-molded shoulder 32 when the cell 1 is mounted under pressure. This prevents excessive force loading on the sides of the cell in its longitudinal direction, which would otherwise lead to damage to the edge seals, thus ensuring the stability and service life of the cell 1.

[0081] It should be noted that the terms "attach", "connected", "join", and the like, unless expressly stated or defined otherwise, should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an interface, an internal connection between two elements, or an interaction between two elements. One of ordinary skill in the art can understand the specific meaning of the above terms in the application according to the specific circumstances. Furthermore, it is intended that the orientation or positional relationship indicated by the terms "top", "bottom", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., is based on the orientation or position shown in the drawings.Positional relationship and serves only to facilitate and simplify the description of the present application, but does not indicate or imply that the designated device or element must have a particular orientation or be designed and operated in a particular orientation, which is why the terms mentioned cannot be understood as limitations of the present application.

[0082] The relational terms such as "first" and "second" are used herein merely to distinguish one object or operation from another, without asserting or implying any actual relationship or sequence between those objects or operations. Furthermore, the terms "comprise," "include," or any variation thereof are intended to mean inclusively including, such that a set of processes, procedures, items, or facilities that includes certain elements also includes other, unlisted elements or elements inherent to such processes, procedures, items, or facilities.In the absence of any additional limitation, an element limited by the expression ‘comprises a’ does not exclude the possibility that one or more other identical elements are also included in the processes, methods, articles or equipment containing that element.

[0083] Only the preferred embodiments of the present utility model have been explained above, but the present utility model is not intended to be limited thereto. All modifications and equivalent substitutions that fall within the scope of the idea and principle of the present utility model are intended to be included within the scope of protection of the present utility model.

Claims

[1] Battery, characterized by , that it comprises a cell (1), a protective plate (2) and an injection-molded plastic structure (3), wherein the cell (1) has tabs (12) and an upper edge seal (111), wherein the tabs (12) each protrude from the upper edge seal (111), wherein the protective plate (2) is connected to the tabs (12) and the protective plate (2) comprises a main plate (21) on a side of the upper edge seal (111) facing away from the cell (1) and at least one flexible printed circuit board (22) connected to the main plate (21), wherein the injection-molded plastic structure (3) encloses at least the tabs (12), the upper edge seal (111), the main plate (21) and a part of the flexible printed circuit board (22), wherein an outlet (221) of the flexible printed circuit board (22) is located outside the injection-molded plastic structure (3) and a recess (31) is formed at a location in the injection-molded plastic structure (3) corresponding to the location where the outlet (221) protrudes, wherein the outlet (221) is located at least partially in the recess (31), and wherein the recess (31) has a minimum recess width of not less than 2 mm in a first direction and the recess (31) has a recess depth of not less than 0.5 mm in a second direction. [2] Battery according to claim 1, characterized by, that the recess (31) comprises a first recess flank (311) and a recess bottom wall (313) which is connected to an end of the first recess flank (311) facing the upper edge seal (111), wherein the outlet (221) projects into the recess (31) via the first recess flank (311). [3] Battery according to claim 2, characterized by , that an angle of 90° to 100° is enclosed between the first recess flank (311) and the recess bottom wall (313); and / or that the opening width of the recess (31) in the first direction is greater than the width of the bottom of the recess (31) in the first direction, wherein the width of the recess bottom wall (313) in the first direction is not less than 2 mm. [4] Battery according to claim 2, characterized by, that the upper edge seal (111) is provided on at least one side in the first direction with a convex corner (113) of the edge seal, wherein the injection-molded plastic structure (3) also encloses the convex corner (113) of the edge seal. [5] Battery according to claim 4, characterized by , that an injection molding shoulder (32) is formed in the respective area of ​​the injection molded plastic structure (3) which encloses the convex corner (113) of the edge seal; and that the recess (31) further comprises a second recess flank (312) which is arranged opposite the first recess flank (311), wherein an end of the second recess flank (312) facing the upper edge seal (111) is connected to the recess bottom wall (313), and wherein a side of the injection molding shoulder (32) facing the outlet (221) is formed as the second recess flank (312). [6] Battery according to claim 5, characterized by, that the injection molded shoulder (32) has a width in the first direction of not less than 1.5 mm on its upper surface. [7] Battery according to claim 5, characterized by , that one of the surfaces of the outlet (221) facing the upper edge seal (111) is at a height that is no greater than that of the upper surface of the convex corner (113) of the edge seal; and / or that an angle of 90° to 150° is enclosed between the second recess flank (312) and the recess bottom wall (313). [8] Battery according to claim 7, characterized by , that the angle between the second recess flank (312) and the recess bottom wall (313) is in the range of 95° to 140°. [9] Battery according to any one of claims 4 to 6, characterized by , that one of the surfaces of the outlet (221) facing the upper edge seal (111) is at a height greater than that of the upper surface of the convex corner (113) of the edge seal; and / or that an angle of -10° to 10° is included between an upper surface of the area of ​​the injection-molded plastic structure (3) that encloses the convex corner (113) of the edge seal and the horizontal; and / or that the upper surface of the area of ​​the injection-molded plastic structure (3) that surrounds the convex corner (113) of the edge seal is at a height that is no greater than that of the recess bottom wall (313). [10] Battery according to any one of claims 5 to 8, characterized by , that the flexible printed circuit board (22) is arranged on at least one side of the main board (21) in the first direction; and that an upper surface of an area of ​​the injection-molded plastic structure (3) which encloses at least the main board (21) is at a height that is not lower than that of the upper surface of the injection-molded shoulder (32).

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