Lithium battery protection board

Abstract

The utility model provides a lithium battery protection plate, and relates to the field of protection plates. Comprising a protection plate body, a fuse, a lithium battery protection IC, a plurality of field effect transistors, a plurality of resistors and a plurality of capacitors are integrated on the protection plate body, and the protection plate body has charging and discharging high and low temperature protection and can perform multi-level and multi-aspect protection on a battery. A round hole is designed in the middle of the protection plate body, a bonding pad is arranged on the back face of the round hole and electrically connected with the lithium battery protection IC, and the protection plate body is externally connected with a first connecting line and a second connecting line. In the using process, the bonding pad is buckled on the positive electrode or the negative electrode of the lithium battery connected in series, so that lines led out by the protection plate can be effectively reduced, and the condition that the bonding pad is easy to damage or poor in contact does not exist in the using process; the difficulty, the reject ratio and the like of multi-series and parallel assembly of the battery pack are greatly reduced, and the production efficiency can be greatly improved.

Description

Technical Field

[0001] This application relates to the field of protection boards, and more specifically, to a lithium battery protection board. Background Technology

[0002] Lithium batteries require additional protection boards during charging and discharging to prevent overcharging or excessive current during charging; and to prevent damage to the battery from excessive discharge leading to low voltage or overloaded high current. Existing protection boards require additional leads, which are prone to damage or poor contact during use, thus requiring improvement. Summary of the Invention

[0003] The purpose of this application is to provide a lithium battery protection board that can solve the above-mentioned technical problems.

[0004] This application provides a lithium battery protection board, including a protection board body. The protection board body integrates a fuse, a lithium battery protection IC, multiple field-effect transistors, multiple resistors, and multiple capacitors. A circular hole is provided in the middle of the protection board body, and a solder pad is provided on the back of the circular hole. The solder pad is electrically connected to the lithium battery protection IC. A first connection line and a second connection line are externally connected to the protection board body.

[0005] Preferably, the solder pads are provided in three parts, and the solder pads are respectively connected to the positive and negative terminals of the lithium battery.

[0006] Preferably, the first connecting line and the second connecting line are arranged in a flat shape.

[0007] Preferably, both the end of the first connecting line away from the protective plate body and the end of the second connecting line away from the protective plate body are provided with a transverse connecting member.

[0008] Preferably, a notch is provided on one side of the lower end of the protective plate body.

[0009] Preferably, the lithium battery protection IC is model CM1032.

[0010] The beneficial effects of this utility model are:

[0011] This utility model provides a lithium battery protection board, including a protection board body. The protection board body integrates a fuse, a lithium battery protection IC, multiple field-effect transistors, multiple resistors, and multiple capacitors. A circular hole is provided in the center of the protection board body, and a solder pad is provided on the back of the circular hole. The solder pad is electrically connected to the lithium battery protection IC. A first connecting line and a second connecting line are externally connected to the protection board body. This utility model adds a fuse, a lithium battery protection IC, and solder pads to the protection board body, enabling multi-level protection of the battery. During use, the solder pads are attached to the positive or negative terminals of the series-connected lithium batteries. This utility model effectively reduces the number of leads from the protection board, and the solder pads are not easily damaged or prone to poor contact during use, greatly reducing the difficulty of assembling the protection board and improving production efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the PCB of this utility model;

[0014] Figure 2 This is a circuit schematic diagram for a utility model.

[0015] Figure 3 This is another PCB schematic diagram of this utility model.

[0016] The reference numerals in the attached figures are as follows:

[0017] 1. Protection board body; 2. Fuse; 3. Solder pad; 4. First connection line; 5. Second connection line; 6. Notch. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do 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 a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] like Figure 1-3As shown, a lithium battery protection board includes a protection board body 1. The protection board body 1 integrates a fuse 2, a lithium battery protection IC, multiple field-effect transistors, multiple resistors, and multiple capacitors. A circular hole is provided in the middle of the protection board body 1, and a solder pad 3 is provided on the back of the circular hole. The solder pad 3 is electrically connected to the lithium battery protection IC. A first connecting line 4 and a second connecting line 5 are externally connected to the protection board body 1. This utility model adds a fuse 2, a lithium battery protection IC, and a solder pad 3 to the protection board body 1, which can provide multi-level protection for the battery. In use, the solder pad 3 is attached to the positive or negative terminal of the series-connected lithium batteries. This utility model can effectively reduce the number of lines led out from the protection board. The solder pad 3 is not easily damaged or has poor contact during use, which greatly reduces the difficulty of assembling the protection board and improves production efficiency.

[0025] In this embodiment, three pads 3 are provided, and the pads 3 are respectively connected to the positive and negative terminals of the lithium battery; specifically, B-: connected to the negative terminal of the first battery; B1: connected to the positive terminal of the first battery and the negative terminal of the second battery; B2: connected to the positive terminal of the second battery and the negative terminal of the third battery; B+: connected to the positive terminal of the third battery; P+: positive terminal of the charge / discharge port; P-: negative terminal of the charge / discharge port; T: surface mount NTC port.

[0026] In this embodiment, to facilitate the distinction between the front and back sides, a notch 7 is provided on one side of the lower end of the protective plate body 1.

[0027] In this embodiment, the lithium battery protection IC is model CM1032. The continuous operating current of this utility model is ≤5A, the first-level discharge overcurrent protection is 7-13A (typical value 10A), and it has charge and discharge high temperature control and secondary protection.

[0028] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lithium battery protection board, characterized in that: The device includes a protection board body, which integrates a fuse, a lithium battery protection IC, multiple field-effect transistors, multiple resistors, and multiple capacitors. A circular hole is provided in the middle of the protection board body, and a solder pad is provided on the back of the circular hole. The solder pad is electrically connected to the lithium battery protection IC. A first connection line and a second connection line are externally connected to the protection board body.

2. The lithium battery protection board according to claim 1, characterized in that: The solder pads are provided in three parts, and the solder pads are respectively connected to the positive and negative terminals of the lithium battery.

3. A lithium battery protection board according to claim 1, characterized in that: The first connecting line and the second connecting line are arranged in a flat shape.

4. A lithium battery protection board according to claim 1, characterized in that: A notch is provided on one side of the lower end of the protective plate body.

5. A lithium battery protection board according to claim 1, characterized in that: The lithium battery protection IC is model CM1032.

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