Electrochemical device and electric apparatus

Abstract

The utility model discloses electrochemical device and electric equipment, including electric core, the insulating paper is arranged on the top surface of electric core, and the pole lug of electric core is connected circuit board, and the circuit board includes protection board hard board and soft board, and the injection molding glue structural member is covered on protection board hard board, and the upper end of soft board extends to the upper side of injection molding glue structural member, and the top fixed gasket is arranged on injection molding glue structural member along its width direction, and the upper side of top fixed gasket is provided with FPC fixed gasket, and FPC fixed gasket is arranged along the length direction of injection molding glue structural member, and FPC fixed gasket is provided with virtual knife line, and the upper end of soft board is located inside FPC fixed gasket, and both ends of FPC fixed gasket are arranged on both sides of injection molding glue structural member, and the protection effect is played through top fixed gasket and FPC fixed gasket, and the warping of the upper end of soft board located on the lower side of FPC fixed gasket is resisted through the tension of FPC fixed gasket, and it is convenient for subsequent assembly.

Description

Technical Field

[0001] This utility model relates to the field of electrochemical device technology, specifically to electrochemical devices and electrical equipment. Background Technology

[0002] Electrochemical devices (such as polymer cells) are widely used in electronic devices such as electronic mobile devices, power tools and electric vehicles. Battery cells often adopt a structure of edge sealing and bending combined with injection molding. The FPC flexible board of the cell often warps due to stress factors. Warping occupies the space of other components that need to be assembled. During the assembly process, the warped FPC flexible board needs to be pressed down before the assembly can continue, which is not conducive to further improving assembly efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide an electrochemical device and electrical equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, this application provides an electrochemical device, including a battery cell. Insulating paper is arranged on the top surface of the battery cell. The battery cell's tabs are connected to a circuit board. The circuit board includes a rigid protective plate and a connected flexible plate. A plastic injection molding component is covered on the rigid protective plate. The upper end of the flexible plate extends to the upper side of the plastic injection molding component. A top fixing pad is arranged on the plastic injection molding component along its width direction. An FPC fixing pad is disposed on the upper side of the top fixing pad. The FPC fixing pad is arranged along the length direction of the plastic injection molding component and has a dotted knife line. The upper end of the flexible plate is located inside the FPC fixing pad, and both ends of the FPC fixing pad are arranged on both sides of the plastic injection molding component.

[0006] In some embodiments of this utility model, the two ends of the FPC fixing pad are provided with inwardly bent ends, which are arranged on the side of the injection molded structural part, and the height of the bent ends does not exceed the height of the injection molded structural part.

[0007] In some embodiments of this utility model, the sealing edges on both sides of the top of the battery cell are provided with bent angles, the bending angle of which ranges from 0.5 to 30°, and the bent angles are covered within the injection-molded structural component, the inclination angle of the side of the injection-molded structural component ranges from 0.5 to 30°.

[0008] In some embodiments of this utility model, a bottom pad is arranged at the bottom of the battery cell, the width of the FPC fixing pad is smaller than the width of the injection molded structural component, the cross-section of the top fixing pad is U-shaped, and the lower end of the top fixing pad is arranged on both sides of the battery cell.

[0009] In some embodiments of this utility model, the lower end of the flexible board is connected to the protective rigid board, the middle section of the flexible board is U-shaped, the top of the injection molded structural component is provided with a placement recess corresponding to the upper end of the flexible board, the upper end of the flexible board has a lateral extension, and the extension of the flexible board is provided with a connector for electrical connection with external electrical equipment.

[0010] In some embodiments of this utility model, the injection-molded structural component is provided with a central receiving groove corresponding to the middle section of the flexible plate, and one side of the upper end of the central receiving groove is connected to the placement recess.

[0011] In some embodiments of this utility model, the FPC fixing pad includes a first pad, a single-sided adhesive layer is provided on the inner side of the first pad, a second pad is arranged on one side of the single-sided adhesive layer, the second pad does not overlap with the top fixing pad, and the second pad is arranged above the upper end of the flexible board.

[0012] In some embodiments of this utility model, the first pad is a PI pad, the second pad is a PET pad, and the number of FPC fixing pads is two, which are respectively located on both sides of the top fixing pad.

[0013] In some embodiments of this utility model, the dummy knife line is arranged between the PET pad and the top fixed pad, and the distance between the dummy knife line and the PET pad is no more than 3mm.

[0014] In another aspect, this utility model also provides an electrical device, which includes an electrochemical device as described in any of the above embodiments.

[0015] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:

[0016] 1. The injection molded structural component is arranged with a top fixing pad and an FPC fixing pad in sequence, which provides good protection. The upper part of the flexible board is placed in the placement recess on the top of the injection molded structural component, and the FPC fixing pad is placed above the upper part of the flexible board. The tension of the FPC fixing pad resists the upper part of the flexible board from lifting up, and at the same time facilitates subsequent assembly, which helps to improve assembly efficiency.

[0017] 2. The middle section of the flexible board between the upper and lower ends is U-shaped to provide cushioning. The upper end of the flexible board, together with the injection-molded structural parts and FPC fixing pads on both sides, helps to reduce the possibility of the flexible board breaking due to severe impact when the device is dropped or collided.

[0018] 3. The FPC fixing pad includes a PET pad and a PI pad with a single-sided adhesive layer. The PET pad is placed on the upper part of the flexible board to prevent the single-sided adhesive layer of the PI pad from sticking to the flexible board. At the same time, the double-layer structure is more wear-resistant and helps to enhance tensile strength and extend its service life.

[0019] 4. The FPC fixing pad is equipped with a dummy knife line. When the device is dropped or collided, the dummy knife line is easily broken by stress, thereby reducing the stress on the FPC. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram showing the arrangement of the FPC fixing pad of this utility model;

[0023] Figure 3 This is a schematic diagram of the FPC fixing gasket of this utility model;

[0024] Figure 4 This is a schematic diagram showing the arrangement of the injection-molded structural component of this utility model;

[0025] Figure 5 For the present utility model Figure 4 Enlarged view of point A;

[0026] Explanation of key figure labels:

[0027] 1. Battery cell, 2. Bottom pad, 3. Insulating paper, 4. Protective board (rigid), 40. Flexible board, 41. Middle section, 42. Extension, 43. Connector, 5. Injection molded structural component, 50. Placement recess, 51. Top plane, 52. Middle receiving groove, 6. Top fixing pad, 7. FPC fixing pad, 70. Dotted knife line, 71. PI pad, 72. PET pad, 73. Bending end, a. Bending angle. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0030] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0031] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0032] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0033] See the example. Figure 1-5 :

[0034] An electrochemical device includes a battery cell 1, a bottom pad 2 attached to the bottom of the battery cell 1, an insulating paper 3 arranged on the top surface of the battery cell 1, and a tab of the battery cell 1 connected to a circuit board. The insulating paper 3 is located between the top surface of the battery cell 1 and the circuit board. Preferably, the insulating paper 3 is aramid paper, and the battery cell 1 is a polymer battery cell.

[0035] The circuit board includes a protective rigid board 4 and a connected flexible board 40. The electrode tabs of the battery cell 1 are soldered to the protective rigid board 4. The protective rigid board 4 is covered with an injection-molded structural component 5. The flexible board 40 extends out of the injection-molded structural component 5, and the upper end of the flexible board 40 extends to the upper side of the injection-molded structural component 5. A top fixing pad 6 is arranged on the injection-molded structural component 5 along its width direction, and an FPC fixing pad 7 is arranged on the top fixing pad 6 along the length direction of the injection-molded structural component 5. It can be understood that the plastic structural component is formed by low-pressure injection molding.

[0036] In one embodiment, the lower end of the flexible plate 40 is connected to the protective rigid plate 4. There are two flexible plates 40, which are located on both sides of the protective rigid plate 4. The middle section 41 of the flexible plate between the upper and lower ends of the flexible plate 40 is U-shaped to provide a buffering effect. The top of the injection molded structural component 5 is provided with a placement recess 50 corresponding to the upper end of the flexible plate 40. Preferably, the upper end of the flexible plate 40 does not extend beyond the placement recess 50, and the top plane 51 of the injection molded structural component 5 is between the two placement recesses 50. The injection molded structural component 5 is provided with a central receiving groove 52 corresponding to the middle section 41 of the U-shaped flexible plate. One side of the upper end of the central receiving groove 52 is connected to the placement recess 50.

[0037] The flexible board 40 has an extension portion 42 extending laterally from its upper end, and the extension portion 42 of the flexible board 40 is provided with a connector 43 for electrical connection with external electrical equipment; preferably, the extension portion 42 is perpendicular to the upper end of the flexible board 40.

[0038] In one embodiment, the top fixing pad 6 has a U-shaped cross-section, and the lower end of the top fixing pad 6 is arranged on both sides of the battery cell 1, that is, the height of the top fixing pad 6 is greater than the sum of the heights of the injection molded structural component 5 and the protective plate rigid plate 4; preferably, the height of the top fixing pad 6 is 2-3 times the sum of the heights of the injection molded structural component 5 and the protective plate rigid plate 4.

[0039] The upper end of the flexible plate 40 is located inside the FPC fixing pad 7, and the two ends of the FPC fixing pad 7 are arranged on both sides of the injection molding structure 5.

[0040] In one embodiment, the FPC fixing pad 7 has inwardly bent ends 73 at both ends, and the bent ends 73 are arranged on both sides of the injection molded structural component 5; preferably, the bent ends 73 are glued to the side of the injection molded structural component, and the tension of the FPC fixing pad 7 resists the lifting of the upper end of the soft plate 40, while facilitating subsequent assembly.

[0041] The FPC fixing pad 7 is provided with a dummy knife line 70. Since the dummy knife line 70 is relatively weak, it is easy to break when the device is dropped or collided, thereby reducing the stress of the FPC.

[0042] In one embodiment, the height of the bent end 73 does not exceed the height of the injection-molded structural component 5;

[0043] In one embodiment, the top two sides of the battery cell 1 are provided with bent corners, the bending angle of which is 0.5-30°. The corners are covered inside the injection-molded structural component 5, and the inclination angle of the side opposite to the corner of the injection-molded structural component 5 is 0.5-30°. Preferably, the inclination angle of the side opposite to the corner of the injection-molded structural component 5 is the same as the bending angle of the corner.

[0044] In one embodiment, the width of the FPC fixing pad 7 is smaller than the width of the injection molded structural component 5.

[0045] In one embodiment, the FPC fixing pad 7 includes a first pad, with the bent ends 73 located at both ends of the first pad. A single-sided adhesive layer is provided on the inner side of the first pad, and a second pad is arranged on one side of the single-sided adhesive layer. The second pad does not overlap with the top fixing pad 6 and is arranged above the upper end of the flexible board 40. The first pad is a PI pad 71, and the second pad is a PET pad 72. This avoids the single-sided adhesive layer of the PI pad 71 from sticking to the flexible board 40, which facilitates assembly. At the same time, the double-layer structure is more wear-resistant and helps to enhance tensile strength and extend its service life.

[0046] In one embodiment, the number of FPC fixing pads 7 is two, and they are located on both sides of the top fixing pad 6. Preferably, the thickness of the PI pads 71 ​​is 0.2-0.3 mm.

[0047] In one embodiment, the dummy knife line 70 is arranged between the PET pad 72 and the top fixed pad 6, and the distance between the dummy knife line 70 and the PET pad 72 is no more than 3mm.

[0048] In one embodiment, the arrangement distance between the virtual knife line 70 and the extension 42 is no greater than 3mm.

[0049] This application also provides an electrical device, which includes the electrochemical device as described in any of the above embodiments. The descriptions of the foregoing specification and embodiments are used to explain the scope of protection of this utility model, but do not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. An electrochemical device, characterized by: The device includes a battery cell (1), an insulating paper (3) is arranged on the top surface of the battery cell (1), and the tabs of the battery cell (1) are connected to a circuit board. The circuit board includes a protective rigid board (4) and a connected flexible board (40). The protective rigid board (4) is covered with an injection molding structure (5). The upper end of the flexible board (40) extends to the upper side of the injection molding structure (5). A top fixing pad (6) is arranged on the injection molding structure (5) along its width direction. An FPC fixing pad (7) is provided on the upper side of the top fixing pad (6). The FPC fixing pad (7) is arranged along the length direction of the injection molding structure (5). The FPC fixing pad (7) is provided with a dotted knife line (70). The upper end of the flexible board (40) is located inside the FPC fixing pad (7). The two ends of the FPC fixing pad (7) are arranged on both sides of the injection molding structure (5).

2. The electrochemical device of claim 1, wherein: The FPC fixing pad (7) has inwardly bent ends (73) at both ends. The bent ends (73) are arranged on the side of the injection molded structural part (5), and the height of the bent ends (73) does not exceed the height of the injection molded structural part (5).

3. The electrochemical device of claim 2, wherein: The top two sides of the battery cell (1) are provided with bent corners, the bending angle of which is 0.5-30°. The corners are covered inside the injection-molded structural component (5), and the tilt angle of the side of the injection-molded structural component (5) is 0.5-30°.

4. The electrochemical device of claim 1, wherein: The bottom of the battery cell (1) is provided with a bottom pad (2), the width of the FPC fixing pad (7) is smaller than the width of the injection molding structure (5), the cross-section of the top fixing pad (6) is U-shaped, and the lower end of the top fixing pad (6) is arranged on both sides of the battery cell (1).

5. The electrochemical device of claim 1, wherein: The lower end of the flexible board (40) is connected to the protective plate hard board (4). The middle section (41) of the flexible board is U-shaped. The top of the injection molded structural component (5) is provided with a placement recess (50) corresponding to the upper end of the flexible board (40). The upper end of the flexible board (40) has an extension (42) extending laterally. The extension (42) of the flexible board (40) is provided with a connector (43) for electrical connection with external electrical equipment.

6. The electrochemical device of claim 5, wherein: The injection molding structural component (5) is provided with a central receiving groove (52) corresponding to the middle section (41) of the soft plate, and one side of the upper end of the central receiving groove (52) is connected to the placement recess (50).

7. The electrochemical device according to any one of claims 1 to 6, wherein: The FPC fixing pad (7) includes a first pad, a single-sided adhesive layer is provided on the inner side of the first pad, a second pad is arranged on one side of the single-sided adhesive layer, the second pad does not overlap with the top fixing pad (6), and the second pad is arranged above the upper end of the flexible board (40).

8. The electrochemical device of claim 7, wherein: The first pad is a PI pad (71), the second pad is a PET pad (72), and the number of FPC fixing pads (7) is two, which are located on both sides of the top fixing pad (6).

9. The electrochemical device of claim 8, wherein: The dummy knife line (70) is arranged between the PET pad (72) and the top fixed pad (6), and the distance between the dummy knife line (70) and the PET pad (72) is no more than 3mm.

10. An electrical device, characterized by: The electrical equipment includes the electrochemical device as described in any one of claims 1-9.

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