Integrated lithium ion battery protection plate and lithium ion battery

Abstract

The utility model provides an integrated lithium ion battery protection board and a lithium ion battery, belonging to the battery technical field, the protection board comprises a PCB board, and terminals and a B-metal sheet arranged on the PCB board, the terminals comprise a B + terminal and a P-terminal, the B + terminal comprises a B + metal sheet and a B + boss, and the B + metal sheet is fixed on the B + boss through a metal connecting piece; the P-terminal is composed of a P-metal sheet and a P-boss, and the P-metal sheet is fixed on the P-boss through a metal connecting piece. According to the utility model, the B + terminal, the P-terminal and the B-metal sheet are integrated on the PCB to form an integrated protection plate, so that the space utilization rate of the lithium ion battery is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and more specifically relates to an integrated lithium-ion battery protection board and a lithium-ion battery. Background Art

[0002] With the rapid development of the new energy industry, people have increased their requirements for the battery life of electric vehicles and higher battery capacity. Improving the battery space utilization is an effective way to increase battery capacity. + Positive terminal and P - The terminals are integrated into the PCB to form an integrated protection board, which greatly improves the space utilization of lithium-ion batteries and improves the efficiency of battery production and assembly.

[0003] Patent CN206834217U discloses a battery comprising a cell, a protective plate, and a steel frame. The protective plate is electrically connected to the top of the cell. The protective plate includes terminals, an FPC, and a PCB. The FPC and PCB are bonded to the steel frame with thermally conductive adhesive. The terminals are electrically connected to a mobile phone to provide power. However, the protective plate serves only as a current collector, requiring the terminals and FPC to be bonded to its surface, resulting in low space utilization.

[0004] Patent CN214280057U discloses a connection structure for a lithium battery protection board. The protection board includes a "copper coin"-shaped PCB board with etched electrical connections and electronic components on the board. A soldering window is provided in the middle of the board, and the electronic components are placed on the front of the board. The front of the board also has positive and negative terminals. A pair of negative connecting pieces are provided on the back of the board, and the negative connecting pieces are located on a pair of opposite sides of the soldering window. The negative connecting pieces are fixedly connected to the board, and at least one of them is electrically connected to the negative terminal. A negative soldering connecting piece is provided below the negative connecting piece, and the negative soldering connecting piece is fixedly electrically connected to the negative connecting piece. However, the protection board uses welding to connect the terminals and the connecting piece, which cannot achieve the overcurrent function.

[0005] In the above patents, the protective plates all play the role of current collection and cannot achieve the function of over-current, and the space utilization rate is low. Summary of the Invention

[0006] 1. Problems to be solved

[0007] In response to the problem of low space utilization of existing lithium-ion batteries, the first purpose of the utility model is to provide an integrated lithium-ion battery protection board, which serves as a current overflow board, integrates components on the same board, and improves space utilization.

[0008] Another object of the present invention is to provide a lithium-ion battery comprising the protective plate, wherein the lithium-ion battery has high space utilization.

[0009] 2. Technical solution

[0010] In order to solve the above problems, the present invention adopts the following technical solutions.

[0011] An integrated lithium-ion battery protection board, comprising:

[0012] PCB board, used for arranging electronic components, with charging, discharging, overcurrent and short circuit protection functions;

[0013] Terminals: Set on the PCB board to form a current loop, the terminals include B + Terminal and P - terminal,

[0014] The B + Terminal B + Metal sheet and B + The boss is composed of metal connectors. + The metal sheet is fixed to B + On the boss; + The function of the metal sheet is to provide the contact area of ​​the monomer cover plate and ensure the positive current output of the module. + The boss has a threaded hole, which has the functions of conducting electricity and fastening the external wiring harness;

[0015] The P - Terminals are P - Metal sheet and P - The boss is composed of metal connectors. - The metal sheet is fixed to P - On the boss. P - The metal sheet is used to provide contact area between the terminal and the PCB to ensure current input. - The boss has a threaded hole, which has the functions of conducting electricity and fastening the external wiring harness.

[0016] B - Metal sheet, used to connect the negative terminal of the battery to the PCB board.

[0017] This application will connect the terminal and B - The metal sheets are assembled on the PCB board 1 to form an integrated lithium-ion battery protection board. The protection board serves as a current overflow board to improve the space utilization of the lithium-ion battery.

[0018] Furthermore, the metal connecting piece is a bolt, and the B + Boss and P - A threaded hole is provided on the boss.

[0019] The metal connector is used for external circuit connection. The metal connector can also be a connector made of other metal materials, such as a pin and a pin hole, as long as it can achieve circuit connection.

[0020] When the metal connecting piece is a bolt, the boss is provided with a threaded hole, and the metal sheet is fastened under the boss by the bolt.

[0021] During actual use, the shape of the boss matches the metal connector. When the metal connector is a bolt, a threaded hole is provided on the boss. When the shape of the metal connector changes, the shape of the boss may also change.

[0022] Furthermore, terminal through holes for accommodating terminals are provided on the surface of the PCB board.

[0023] The height of the battery module can be effectively reduced by providing terminal through holes for accommodating the terminals.

[0024] Furthermore, the B + Metal sheet and P - Corner pins are provided at the corners of the metal sheet, and the metal sheet is fixed to the PCB board through the corner pins.

[0025] In the process of fastening the metal sheet with metal parts, the metal sheet is easy to deform. Therefore, corner pins are provided around the periphery and corners of the metal sheet to fix the metal sheet to the PCB board through the corner pins to prevent serious deformation.

[0026] Furthermore, information collection point through holes are provided on the PCB board for laser welding the information collection connecting pieces.

[0027] A lithium-ion battery, comprising the above-mentioned lithium-ion battery protection board, wherein the lithium-ion battery protection board comprises a PCB board, wherein the PCB board is provided with terminals, wherein the terminals comprise B + Terminal and P - Terminal, the B + The terminal is connected to the positive terminal of the lithium battery, the B - The metal sheet is connected to the negative terminal of the lithium battery.

[0028] By adopting the combination of terminals and B - The integrated lithium-ion battery protection plate of the metal sheet effectively improves the space utilization of lithium-ion batteries and the efficiency of battery production and assembly.

[0029] Furthermore, the PCB board is provided with a pole piece through hole.

[0030] The shape of the electrode through hole is rectangular, and other shapes can also be selected according to battery requirements. The number of electrode through holes is determined according to the number of battery cells connected in parallel, and the number is at least one. The electrode through hole is used to connect the positive electrode or negative electrode of the battery to achieve circuit connection.

[0031] Furthermore, the lithium-ion battery further comprises a battery cell, the PCB board is fixedly connected to the battery cell, the battery cell comprises a positive electrode sheet and a negative electrode sheet, the B + The metal sheet passes through the electrode through hole and is connected to the positive electrode of the battery. - The metal sheet passes through the electrode through hole and is connected to the negative electrode of the battery.

[0032] During the discharge process, the current flows from the positive electrode of the battery to the + Terminal, output to external electrical appliances, and then through P - Flows into the terminal and flows to B through the PCB board - The metal sheet is connected to the negative terminal of the battery to form a circuit.

[0033] The protective plate and battery of the utility model can be applied to cylindrical, square shell, soft pack and other battery fields.

[0034] 3. Beneficial effects

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] (1) The utility model provides a terminal through hole for accommodating the terminal on the surface of the PCB board, and connects the terminal and B - The metal sheets are assembled on the PCB to form an integrated lithium-ion battery protection board. This protection board acts as a current collector, effectively improving the space utilization of the lithium-ion battery.

[0037] (2) This application uses angle pins to fix the metal sheet to the PCB board to prevent serious deformation of the metal sheet during the process of fastening the bolts;

[0038] (3) The lithium-ion battery of the present invention adopts a combination of terminals and B - The integrated lithium-ion battery protection plate of the metal sheet effectively improves the space utilization of the lithium-ion battery and is conducive to improving the efficiency of battery production and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale.

[0040] Figure 1 This is an exploded diagram of the integrated lithium-ion battery protection board structure;

[0041] Figure 2 This is the assembly diagram of the integrated lithium-ion battery protection board;

[0042] Figure 3 This is a cross-sectional view of the integrated lithium-ion battery protection board;

[0043] In the figure: 1. PCB board: 11. Terminal through hole; 12. Information collection point through hole; 13. Pole through hole;

[0044] 2. Terminal: 21, B + Terminal: 211, B + Metal sheet; 212, B + Boss; 22, P - Terminal; 221, P - Metal sheet; 222, P - boss;

[0045] 3. B - Sheet metal. DETAILED DESCRIPTION

[0046] The following detailed description and example embodiments of the present invention can be better understood with reference to the accompanying drawings, in which elements and features of the present invention are identified by reference numerals.

[0047] Example 1

[0048] An integrated lithium-ion battery protection board, comprising:

[0049] PCB board 1, used for arranging electronic components, with charging, discharging, overcurrent and short circuit protection functions;

[0050] Terminal 2: Located on the PCB board 1, a terminal through hole 11 is provided on the PCB board 1, and the terminal 2 is provided in the terminal through hole 11 on the PCB board 1. By providing the terminal through hole 11 for accommodating the terminal 2, the height of the battery module is reduced.

[0051] The terminal 2 includes B + Terminal 21 and P - Terminal 22:

[0052] The B+ terminal 21 is connected to the B + Metal sheets 211 and B + The boss 212 is composed of the B + The boss 212 is provided with a threaded hole, and the B + Metal sheet 211 is fixed to B + On the boss 212;

[0053] The P - Terminal 22 is P - Metal sheet 221 and P - The boss 222 is composed of the P - The boss 222 is provided with a threaded hole, through which the P - The metal sheet 221 is fixed to the P- On the boss 222;

[0054] B - Metal sheet 3: used to connect the module's negative terminal to the PCB 1 to form a current loop.

[0055] Among them, the PCB board 1 is a conductive circuit board with a metal layer plated on its surface. In Example 1, it is a nickel-plated layer. In actual use, other metal plating layers can also be selected according to the battery.

[0056] The shape of the terminal through hole 11 is determined according to the shape of the terminal 2. In this embodiment, it is circular, but in actual use, it can also be polygonal or other shapes.

[0057] The B + Metal sheet 211 and P - Corners of the metal sheet 221 are provided with corner pins, and the metal sheet is fixed on the PCB board 1 through the corner pins.

[0058] Furthermore, the B + Boss 212 and P - The boss 222 has a threaded hole for connecting to an external circuit. In this embodiment, B + The cross-sectional shape of the boss 212 is circular, and may also be polygonal or other shapes, depending on the battery requirements.

[0059] Specifically, the B + Terminal 21, B + The metal sheet 211 is provided at B + Below the boss 212, with B + The boss 212 is an integral structure, wherein B + The function of the metal sheet 211 is to provide the contact area of ​​the monomer cover plate electrode to ensure the positive current output of the module. + The boss 212 has a threaded hole, which has the functions of conducting electricity and fastening the external wiring harness;

[0060] The P - Terminal 22, P - Metal sheet 221 and P - Boss 222 is composed of P - The boss 222 is an integral structure, wherein P - The metal sheet 221 is used to provide a contact area between the terminal 2 and the PCB board 1 to ensure current input. - The boss 222 has a threaded hole, which has the functions of conducting electricity and fastening the external wiring harness.

[0061] The B + Terminal 21 and P - Terminal 22, B -A tooling patch is used between the metal sheet 3 and the PCB board 1 to meet the overcurrent requirements.

[0062] The PCB board 1 is provided with an information collection point through hole 12 for laser welding the information collection connecting piece. The shape of the information collection point through hole 12 can be circular, rectangular, or other shapes, which can be selected according to the battery requirements.

[0063] In the existing lithium-ion battery, the electronic components such as terminal 2 are all arranged on the surface of PCB board 1, and the protection board only plays the role of current collection, resulting in low battery space utilization. Therefore, this application will connect terminal 2 and B - The metal sheet 3 is assembled on the PCB board 1 to form an integrated lithium-ion battery protection board. A terminal through hole 11 for accommodating the terminal 2 is provided on the surface of the PCB board 1. The terminal 2 is provided with a boss and a metal sheet. The metal sheet is located below the boss. The boss is provided with a threaded hole. The metal sheet is fastened by a bolt in the boss. However, during the fastening process, the metal sheet is easily deformed. Therefore, corner pins are provided around the metal sheet and at the corners. That is, the metal sheet is fixed to the PCB board 1 by the corner pins to prevent serious deformation. Using the PCB board 1 structure of the present application, the terminal 2 and the B - The metal sheets 3 are assembled on a protection plate, which serves as a flow plate to improve the space utilization of the lithium-ion battery.

[0064] A lithium-ion battery, comprising the above-mentioned lithium-ion battery protection board, wherein the lithium-ion battery protection board comprises a PCB board 1, the PCB board 1 is provided with a terminal 2, and the terminal 2 comprises a B + Terminal 21 and P - Terminal 22, B + Terminal 21 is connected to the positive terminal of the lithium battery. - The metal sheet 3 is connected to the negative terminal of the lithium battery.

[0065] The PCB board 1 is provided with a pole piece through hole 13, which is rectangular in shape. The number of the pole piece through hole 13 is determined according to the number of parallel-connected battery cells, and the number is at least one.

[0066] The lithium-ion battery also includes a cell, and the PCB board 1 is fixedly connected to the cell by a snap or high-temperature resistant glue. The cell includes a positive electrode sheet and a negative electrode sheet. + The metal sheet 211 passes through the electrode through hole 13 and is connected to the positive electrode of the battery. - The metal sheet 3 passes through the electrode through hole 13 and is connected to the negative electrode of the battery.

[0067] When in use, place the PCB board 1 on the negative terminal of the lithium battery. - The metal sheet 3 is electrically connected to the negative electrode of the lithium battery. +The terminal 21 is electrically connected to the positive electrode of the lithium battery. The lithium-ion battery using the structure of the present application has a higher space utilization rate.

[0068] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0069] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An integrated lithium-ion battery protection board, comprising: PCB board (1), terminal (2) and B - The metal sheet (3) is characterized in that the terminal (2) and B - The metal sheet (3) is provided on the PCB board (1), and the terminal (2) includes B + Terminal (21) and P - Terminal (22): The B + Terminal (21) is connected to B + Metal sheet (211) and B + The boss (212) is composed of a metal connector B + The metal sheet (211) is fixed to B + On the boss (212); The P - Terminal (22) is connected to P - Metal sheet (221) and P - The boss (222) is composed of a metal connector to connect the P - The metal sheet (221) is fixed to P - On the boss (222).

2. The integrated lithium-ion battery protection board according to claim 1, characterized in that: The B + Metal sheet (211), P - Metal sheet (221) and B - The metal sheet (3) is provided with a corner pin at the corner, B + Metal sheet (211) and P - The metal sheet (221) is fixed on the PCB board (1) via corner pins.

3. The integrated lithium-ion battery protection board according to claim 2, characterized in that: The PCB board (1) is provided with a terminal through hole (11).

4. The integrated lithium-ion battery protection board according to claim 3, characterized in that: The PCB board (1) is provided with an information collection point through hole (12).

5. A lithium-ion battery, characterized in that: The battery protection board according to any one of claims 1 to 4 comprises a PCB board (1), and the PCB board (1) is provided with a terminal (2) and a B - The metal sheet (3), the terminal (2) includes B + Terminal (21) and P - Terminal (22), the B + Terminal (21) is connected to the positive terminal of the battery, the B - The metal sheet (3) is connected to the negative terminal of the battery.

6. The lithium-ion battery according to claim 5, characterized in that The PCB board (1) is provided with a pole piece through hole (13).

7. The lithium-ion battery according to claim 6, characterized in that The lithium-ion battery further comprises a battery cell, and the PCB board (1) is fixedly connected to the battery cell.

8. The lithium-ion battery according to claim 7, characterized in that The battery cell includes a positive electrode sheet and a negative electrode sheet, and the B + The metal sheet (211) passes through the electrode through hole (13) and is connected to the positive electrode of the battery. - The metal sheet (3) passes through the electrode through-hole (13) and is connected to the negative electrode of the battery.

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