Battery protection board and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery protection board and a battery, the battery protection board comprises an FPC board, the FPC board is in a long strip shape, the FPC board sequentially comprises a first segment, a first bending segment and a second segment along the length direction of the FPC board, at least part of the first segment is bent at the first bending segment and then is parallel to the second segment, the first segment is provided with a through hole, and the second segment is provided with a through hole. And the through hole is welded with the second segment through the bonding pad after the first bending segment is bent. The battery protection plate is low in manufacturing difficulty and high in manufacturing efficiency, and the reject ratio of the battery protection plate is reduced.

Description

Technical Field

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

[0002] During the battery charging and discharging process, when the battery protection board detects overcurrent, overvoltage and short circuit conditions, the IC (integrated circuit) of the protection circuit on the battery protection board will send a control signal to the MOS (abbreviation of MOSFET) to cut off the circuit power supply to avoid damage to the battery cells.

[0003] A traditional battery protection board includes at least three layers of PCB or FPC stacked in sequence along the thickness direction, wherein two adjacent layers are generally connected by glue PP bonding or pressing, and the two methods of glue PP bonding and pressing are used alternately, which makes the production difficult. In addition, since some layers of PCB or FPC are provided with copper layer etched pads, when it is superimposed and pressed with other layers of PCB or FPC without pattern circuits, depressions will be generated at the pads, resulting in a high defective rate of the battery protection board. Utility Model Content

[0004] In view of this, the utility model provides a battery protection board and a battery to solve the problem that the battery protection board is difficult to manufacture and has a high defect rate.

[0005] In a first aspect, the utility model provides a battery protection board, including an FPC board, which is in the shape of a long strip and includes a first segment, a first bending segment and a second segment in sequence along the length direction of the FPC board, at least a portion of the first segment is arranged parallel to the second segment after the first bending segment is bent, and a through hole is provided on the first segment, and the through hole is welded to the second segment through a welding pad after the first bending segment is bent.

[0006] Beneficial effect: After the first bending section is bent, the first segment and the second segment are converted from the original coplanar state to a parallel state, and are fixed by welding through holes and pads, so the first segment and the second segment form two parallel layers. Therefore, the battery protection board after bending and welding is formed into a battery protection board of at least two layers. Compared with stacking, PP bonding and pressing in sequence, the manufacturing difficulty is small and the manufacturing efficiency is high; after bending and welding instead of stacking and pressing, defects such as dents caused by pressing can also be avoided, reducing the defect rate of the battery protection board. In addition, the manufacturing cost of the battery protection board is saved because the number of board bodies used is reduced by bending. The setting of the first bending section can provide rounded corners for bending to avoid bending fractures.

[0007] In an optional implementation, it further includes electronic components, and the electronic components are soldered at the through holes through the soldering pads.

[0008] Beneficial effect: While welding the indispensable electronic components of the FPC board, the first segment and the second segment which are parallel to each other after the first bending segment is bent can be fixed and connected.

[0009] In an optional embodiment, a connecting piece is further included, which is connected to the second segment, and the connecting piece is used to connect to the pole piece of the battery.

[0010] Beneficial effect: The connecting piece can realize the connection between the FPC board and the pole piece of the battery.

[0011] In an optional embodiment, the connecting piece is connected to a side of the second segment facing away from the first segment.

[0012] Beneficial effects: It can prevent the connection piece from contacting with the first segment, thus avoiding dangers such as short circuit caused by the contact, and can also simplify the connection between the connection piece and the battery electrode.

[0013] In an optional implementation, the connecting sheet is a nickel sheet.

[0014] In an optional embodiment, the FPC board includes a two-layer board body.

[0015] Beneficial effect: Since the FPC board includes a two-layer board body, the first segment and the second segment are both two layers. Therefore, the battery protection board after bending and welding is formed into a four-layer battery protection board. Compared with the traditional four-layer battery protection board, the stacking and pressing steps are reduced, avoiding defects such as dents caused by pressing.

[0016] In an optional embodiment, after the first bending section is bent, the shapes and positions of the first segment and the second segment match.

[0017] Beneficial effect: The shape and appearance of the formed battery protection board are regular, which is convenient for connection with the battery.

[0018] In an optional embodiment, the FPC board also includes a third segment, the third segment is connected to an end of the first segment away from the first bending segment, or the third segment is connected to an end of the second segment away from the first bending segment, and the third segment is provided with a connector for connecting to an electrical device.

[0019] Beneficial effect: A connector is provided on the third segment, through which communication connection with the electrical equipment can be achieved, and connection with the power supply of the electrical equipment can be achieved through the connector, thereby realizing power supply of the battery protection board.

[0020] In an optional embodiment, the FPC board also includes a second bending section, which is arranged between the third segment and the first segment, or between the third segment and the second segment; at least a portion of the third segment is parallel to the first segment after being bent at the second bending section.

[0021] Beneficial effect: By setting the second bending section, the third segment can be bent to a position parallel to the first segment and the second segment as needed, thereby reducing the space occupied by the battery protection plate. The second bending section can provide a rounded corner for the bend to avoid bending fracture.

[0022] In an optional embodiment, the third segment is provided with a protrusion protruding along the width direction of the FPC board, the protrusion is located at an end of the third segment away from the first segment and the second segment, and the connector is provided on the protrusion.

[0023] Beneficial effect: By setting the protruding part, the position of the connector can be led out, which facilitates the connection of the connector with other structures.

[0024] In a second aspect, the utility model further provides a battery, comprising the above-mentioned battery protection board. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of a battery protection plate (after bending) according to an embodiment of the utility model from a first viewing angle;

[0027] Figure 2 A schematic diagram of a battery protection plate (after bending) according to an embodiment of the utility model from a second viewing angle;

[0028] Figure 3 This is a schematic diagram of a battery protection plate (after the second bending section is bent) according to an embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of a battery protection plate (before bending) according to an embodiment of the utility model;

[0030] Figure 5 A schematic diagram of a battery according to an embodiment of the utility model from a first viewing angle;

[0031] Figure 6 for Figure 5 A magnified view of part A;

[0032] Figure 7 A schematic diagram of a battery according to an embodiment of the utility model from a second viewing angle;

[0033] Figure 8 It is a schematic diagram of a battery according to an embodiment of the utility model from a third viewing angle.

[0034] Description of reference numerals:

[0035] 1. First segment; 2. First bending segment; 3. Second segment; 4. Electronic components; 5. Connecting piece; 6. Third segment; 61. Protrusion; 7. Connector; 8. Second bending segment; 10. Pole piece. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0037] Combine the following Figures 1 to 8 , describing an embodiment of the utility model.

[0038] According to an embodiment of the utility model, on the one hand, a battery protection board is provided, including an FPC board, the FPC board is in the shape of a long strip, and includes a first segment 1, a first bending segment 2 and a second segment 3 in sequence along the length direction of the FPC board, at least a portion of the first segment 1 is arranged parallel to the second segment 3 after being bent at the first bending segment 2, and a through hole is provided on the first segment 1, and the through hole is welded to the second segment 3 through a welding pad after the first bending segment 2 is bent.

[0039] After the first bending section 2 is bent, the first segment 1 and the second segment 3 are converted from the original coplanar state to a parallel state, and are fixed by welding through holes and pads, so the first segment 1 and the second segment 3 form two parallel layers. Therefore, the battery protection board after bending and welding is formed into a battery protection board of at least two layers. Compared with stacking, glue pp bonding and pressing in sequence, the production difficulty is small and the production efficiency is high; after bending and welding instead of stacking and pressing, defects such as dents caused by pressing can also be avoided, reducing the defective rate of the battery protection board. In addition, the production cost of the battery protection board is saved because the number of board bodies used is reduced by bending. The setting of the first bending section 2 can provide rounded corners for bending to avoid bending fractures.

[0040] In one embodiment, the electronic component 4 is further included, and the electronic component 4 is soldered at the through hole through the soldering pad.

[0041] While welding the indispensable electronic components 4 of the FPC board, the first segment 1 and the second segment 3 which are parallel to each other after the first bending section 2 is bent can also be fixed and connected. Specifically, there is a gap between the first segment 1 and the second segment 3, and the electronic components 4 can be arranged on the side of the first segment 1 facing away from the second segment 3.

[0042] In a specific implementation, the number of pads may be consistent with the number of electronic components 4, or may be more than the number of electronic components 4, some pads are used to weld the first fragment 1 and the second fragment 3, some pads are used to weld the electronic components 4, the first fragment 1 and the second fragment 3, and some pads are used to weld the electronic components 4 to the first fragment 1.

[0043] In one embodiment, a connecting piece 5 is further included, which is connected to the second segment 3 and is used to be connected to the pole piece 10 of the battery.

[0044] The connecting piece 5 can realize the connection between the FPC board and the pole piece 10 of the battery.

[0045] In one embodiment, the connecting piece 5 is connected to the side of the second segment 3 facing away from the first segment 1 .

[0046] The connection piece 5 can be prevented from contacting with the first segment 1 , thereby avoiding dangers such as short circuits caused by the contact, and the connection between the connection piece 5 and the battery electrode 10 can be simplified.

[0047] In one embodiment, the connecting sheet 5 is a nickel sheet.

[0048] In one embodiment, the FPC board includes two layers of board bodies. Specifically, the two layers of board bodies can be bonded by glue pp.

[0049] Since the FPC board includes a two-layer board body, the first segment 1 and the second segment 3 are both two layers. Therefore, the battery protection board after bending and welding is formed into a four-layer battery protection board. Compared with the traditional four-layer battery protection board, the stacking and pressing steps are reduced, avoiding defects such as dents caused by pressing.

[0050] In a specific implementation, the pad can be welded to a layer of the board body of the second segment 3 close to the first segment 1, or can be welded to both layers of the board body of the second segment 3. In this embodiment, the pad is preferably welded to a layer of the board body of the second segment 3 close to the first segment 1.

[0051] As a convertible implementation, the first segments 1 and the second segments 3 may be provided in two groups, and the first bending segments 2 may be provided in three groups. After three bends, the two groups of first segments 1 and the two groups of second segments 3 are alternately provided in parallel, and a four-layer battery protection plate may also be formed.

[0052] In one embodiment, after the first bending section 2 is bent, the shapes and positions of the first segment 1 and the second segment 3 match.

[0053] The battery protection board has a regular shape and appearance after molding, which is convenient for connection with the battery.

[0054] As a convertible implementation, it is also possible that after the first bending section 2 is bent, the first segment 1 and the second segment 3 are only partially parallel, and other positions can be set according to actual needs.

[0055] In one embodiment, the FPC board also includes a third segment 6, which is connected to the end of the first segment 1 away from the first bending segment 2, or the third segment 6 is connected to the end of the second segment 3 away from the first bending segment 2, and a connector 7 is provided on the third segment 6, which is used to connect to an electrical device.

[0056] The third segment 6 is provided with a connector 7, which can realize communication connection with the power-consuming device through the connector 7, and realize connection with the power supply of the power-consuming device through the connector 7 to realize power supply of the battery protection board. The power-consuming device can be a mobile terminal such as a mobile phone and a tablet computer.

[0057] In one embodiment, the FPC board further includes a second bending section, which is arranged between the third segment 6 and the first segment 1, or between the third segment 6 and the second segment 3; at least a portion of the third segment 6 is parallel to the first segment 1 after being bent by the second bending section 8.

[0058] By setting the second bending section 8, the third segment 6 can be bent to a position parallel to the first segment 1 and the second segment 3 as needed, thereby reducing the space occupied by the battery protection board. The second bending section can provide a rounded corner for the bend to avoid bending fracture.

[0059] In one embodiment, the third segment 6 is provided with a protrusion 61 protruding along the width direction of the FPC board. The protrusion 61 is located at one end of the third segment 6 away from the first segment 1 and the second segment 3 , and the connector 7 is provided on the protrusion 61 .

[0060] By providing the protruding portion 61 , the position of the connector 7 can be guided out, so as to facilitate the connection of the connector 7 with other structures.

[0061] In this embodiment, the manufacturing process of the battery protection board includes: fixing the bent FPC board by a finished carrier, printing solder paste on the FPC board, spot tinning on the FPC board, mounting electronic components 4 on the FPC board, setting a pressure cover plate, and then furnace welding the FPC board.

[0062] According to an embodiment of the present invention, on the other hand, a battery is provided, comprising the battery protection board mentioned above. The battery also comprises a pole piece 10 , and the battery protection board is connected to the pole piece 10 of the battery via a connecting piece 5 .

[0063] The steps of connecting the battery protection board and the battery include: sticking protective tape on the battery cell, welding the connecting piece 5 to the pole ear on the pole piece 10, bending the connecting piece 5 and connecting it to the battery protection board, gluing the battery protection board to the battery cell, and protecting the head of the battery with tape.

[0064] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery protection board, characterized in that: The FPC board comprises an FPC board, which is in the shape of an elongated strip and comprises a first segment (1), a first bending segment (2) and a second segment (3) in sequence along the length direction of the FPC board; at least a portion of the first segment (1) is arranged parallel to the second segment (3) after the first bending segment (2) is bent; a through hole is provided on the first segment (1); and the through hole is welded to the second segment (3) through a welding pad after the first bending segment (2) is bent.

2. The battery protection board according to claim 1, characterized in that: It also includes an electronic component (4), wherein the electronic component (4) is welded at the through hole via the welding pad.

3. The battery protection board according to claim 1, characterized in that: It also comprises a connecting piece (5) connected to the second segment (3), and the connecting piece (5) is used to be connected to a pole piece (10) of a battery.

4. The battery protection board according to claim 3, characterized in that: The connecting piece (5) is connected to a side of the second segment (3) facing away from the first segment (1); And / or, the connecting sheet (5) is a nickel sheet.

5. The battery protection board according to claim 1, characterized in that: The FPC board includes a two-layer board body.

6. The battery protection board according to any one of claims 1 to 5, characterized in that: After the first bending section (2) is bent, the shapes and positions of the first segment (1) and the second segment (3) match.

7. The battery protection board according to any one of claims 1 to 5, characterized in that: The FPC board further comprises a third segment (6), wherein the third segment (6) is connected to an end of the first segment (1) away from the first bending segment (2), or the third segment (6) is connected to an end of the second segment (3) away from the first bending segment (2), and the third segment (6) is provided with a connector (7), and the connector (7) is used to connect to an electrical device.

8. The battery protection board according to claim 7, characterized in that: The FPC board further comprises a second bending section (8), which is arranged between the third segment (6) and the first segment (1), or between the third segment (6) and the second segment (3); at least a portion of the third segment (6) is parallel to the first segment (1) after being bent by the second bending section (8).

9. The battery protection board according to claim 7, characterized in that: The third segment (6) is provided with a protruding portion (61) protruding along the width direction of the FPC board, the protruding portion (61) is located at an end of the third segment (6) away from the first segment (1) and the second segment (3), and the connector (7) is arranged on the protruding portion (61).

10. A battery, characterized in that: A battery protection plate comprising the battery protection plate according to any one of claims 1 to 9.

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