Single battery charging protection circuit

Abstract

The utility model discloses a single battery charging protection circuit, which comprises a chip U1 and a chip U2, the model of the chip U1 is DW01A, and the model of the chip U2 is IP5306. A pin 1 of the chip U2 is connected with a resistor R3 and a capacitor C7, the resistor R3 is connected with a capacitor C6, a pin 2 of the chip U2 is connected with a diode D1 and a diode D2, a pin 3 of the chip U2 is connected with a diode D3 and a diode D4, a pin 4 of the chip U2 is connected with the diode D1, the diode D2, the diode D3 and the diode D4, and a pin 5 of the chip U2 is connected with a resistor R5. A diode D1, a diode D2, a diode D3 and a diode D4 are connected to a chip U2, then the diode D1, the diode D2, the diode D3 and the diode D4 can be controlled to emit light to display the electric quantity of a battery in real time, the electric quantity display is more visual, meanwhile, a plurality of protection capacitors such as a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5 are arranged, the anti-static performance of the battery is improved, and the service life of the battery is prolonged. And damage caused by static electricity is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field, specifically is a single battery charging protection circuit. BACKGROUND

[0002] The existing lithium battery circuit board circuit is mainly composed of a switching circuit module, a voltage comparison circuit module, a reference circuit module, an indicator lamp circuit module and a charge and discharge circuit module.

[0003] To solve the above problems, a single battery charging protection circuit is provided. SUMMARY

[0004] The utility model aims at providing a single battery charging protection circuit to solve the problem of the existing switching circuit module in the background art, which is inconvenient to intuitively display the battery capacity during use, leading to inconvenient operation and poor anti-static performance, which causes the module to be easily damaged by static electricity.

[0005] In order to realize the above object, the utility model provides the following technical scheme: a single battery charging protection circuit, including chip U1 (DW01A) and chip U2 (IPS306), the pin 1 of chip U2 (IPS306) is connected with resistance R3 and electric capacity C7, resistance R3 is connected with electric capacity C6, the pin 2 of chip U2 (IPS306) is connected with diode D1 and diode D2, the pin 3 of chip U2 (IPS306) is connected with diode D3 and diode D4, the pin 4 of chip U2 (IPS306) is connected with diode D1, diode D2, diode D3 and diode D4, the pin 5 of chip U2 (IPS306) is connected with resistance R5, resistance R5 is connected with switch S1, the pin 6 of chip U2 (IPS306) is connected with electric capacity C9 and resistance R4, the pin 7 of chip U2 (IPS306) is connected with firewire L1, resistance R4 and electric capacity C8, the pin 8 of chip U2 (IPS306) is connected with electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5, the VDD pin of chip U1 (DW01A) is connected with resistance R1 and electric capacity C1, the VSS pin of chip U1 (DW01A) is connected with electric capacity C1, the DO pin of chip U1 (DW01A) is connected with MOS tube A and is connected with the gate of MOS tube A, the CO pin of chip U1 (DW01A) is connected with MOS tube B and is connected with the gate of MOS tube B, the VM pin of chip U1 (DW01A) is connected with resistance R2, through the pin 1 of chip U2 (IPS306) is connected with diode D1, diode D2, diode D3 and diode D4, and then can control diode D1, diode D2, diode D3 and diode D4 emit light to show the electric capacity of battery in real time, so that the electric capacity display is more intuitive, and multiple protection capacitors such as electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 are arranged, so as to improve the anti-static performance and avoid damage due to static electricity.

[0006] Preferably, the electric capacity C6 and electric capacity C7 are grounded, and the pin 9 of the chip U2 (IPS306) is grounded.

[0007] Preferably, the electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 are grounded.

[0008] Preferably, the switch S1, electric capacity C9 and electric capacity C8 are grounded.

[0009] Preferably, the model of the chip U1 (DW01A) is DW01A, and the model of the chip U2 (IPS306) is IP5306.

[0010] The source of the MOS tube A is connected with one end of the capacitor C1 and the VSS pin of the chip U1 (DW01A), the drain of the MOS tube A is connected with the drain of the MOS tube B, and the source of the MOS tube B is connected with the resistor R2.

[0011] Compared with the prior art, the utility model has the advantages that the diode D1, the diode D2, the diode D3 and the diode D4 are connected on the chip U2 (IPS306), and the light emission of the diode D1, the diode D2, the diode D3 and the diode D4 can be controlled to display the battery capacity in real time, so that the capacity display is more intuitive, and the multiple protection capacitors such as the capacitor C2, the capacitor C3, the capacitor C4 and the capacitor C5 are arranged, so that the anti-static performance is improved, and damage caused by static electricity is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the first circuit principle diagram of the utility model;

[0013] Fig. 2 It is the second circuit principle diagram of the utility model. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0015] Please refer to Figs. 1-2The utility model provides a single battery charging protection circuit, including chip U1 (DW01A) and chip U2 (IPS306), the pin 1 of chip U2 (IPS306) is connected with resistance R3 and electric capacity C7, resistance R3 is connected with electric capacity C6, the pin 2 of chip U2 (IPS306) is connected with diode D1 and diode D2, the pin 3 of chip U2 (IPS306) is connected with diode D3 and diode D4, the pin 4 of chip U2 (IPS306) is connected with diode D1, diode D2, diode D3 and diode D4, the pin 5 of chip U2 (IPS306) is connected with resistance R5, and resistance R5 is connected with switch S1, the pin 6 of chip U2 (IPS306) is connected with electric capacity C9 and resistance R4, the pin 7 of chip U2 (IPS306) is connected with firewire L1, resistance R4 and electric capacity C8, the pin 8 of chip U2 (IPS306) is connected with electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5, the VDD pin of chip U1 (DW01A) is connected with resistance R1 and electric capacity C1, and the VSS pin of chip U1 (DW01A) is connected with electric capacity C1, the DO pin of chip U1 (DW01A) is connected with MOS tube A, and is connected with the gate of MOS tube A, the CO pin of chip U1 (DW01A) is connected with MOS tube B, and is connected with the gate of MOS tube B, the VM pin of chip U1 (DW01A) is connected with resistance R2, and through being connected with diode D1, diode D2, diode D3 and diode D4 on chip U2 (IPS306), then can control diode D1, diode D2, diode D3 and diode D4 emit light to show the electric capacity of battery in real time, make the electric capacity display more intuitive, and simultaneously be provided with multiple protection capacitors such as electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5, thereby improve its anti-static property, avoid damaging due to static.

[0016] Electric capacity C6 and electric capacity C7 are grounded, and the pin 9 of chip U2 (IPS306) is grounded.

[0017] Electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 are all grounded.

[0018] Switch S1, electric capacity C9 and electric capacity C8 are all grounded.

[0019] The model of chip U1 (DW01A) is DW01A, and the model of chip U2 (IPS306) is IP5306.

[0020] The source of MOS tube A is connected with one end of the VSS pin of chip U1 (DW01A) connected with electric capacity C1, the drain of MOS tube A is connected with the drain of MOS tube B, and the source of MOS tube B is connected with resistance R2.

[0021] In use, the embodiment of the application can display the battery power in real time by connecting diode D1, diode D2, diode D3 and diode D4 on chip U2 (IPS306) and controlling the light emission of diode D1, diode D2, diode D3 and diode D4, so that the power display is more intuitive, and the anti-static performance is improved by the multiple protective capacitors such as capacitor C2, capacitor C3, capacitor C4 and capacitor C5, so as to avoid damage caused by static electricity.

[0022] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A single-cell battery charging protection circuit, comprising chip U1 and chip U2, wherein chip U1 is model DW01A and chip U2 is model IP5306, characterized in that: Pin 1 of chip U2 is connected to resistor R3 and capacitor C7. Resistor R3 is connected to capacitor C6. Pin 2 of chip U2 is connected to diodes D1 and D2. Pin 3 of chip U2 is connected to diodes D3 and D4. Pin 4 of chip U2 is connected to diodes D1, D2, D3, and D4. Pin 5 of chip U2 is connected to resistor R5, which is connected to switch S1. Pin 6 of chip U2 is connected to capacitor C9 and resistor R4. Pin 7 of chip U1 is connected to the live wire L1, resistor R4, and capacitor C8. Pin 8 of chip U2 is connected to capacitors C2, C3, C4, and C5. Pin VDD of chip U1 is connected to resistor R1 and capacitor C1. Pin VSS of chip U1 is connected to capacitor C1. Pin DO of chip U1 is connected to MOSFET A and its gate. Pin CO of chip U1 is connected to MOSFET B and its gate. Pin VM of chip U1 is connected to resistor R2.

2. The single-cell battery charging protection circuit according to claim 1, characterized in that: The capacitors C6 and C7 are grounded, and pin 9 of the chip U2 is grounded.

3. The single-cell battery charging protection circuit according to claim 1, characterized in that: Capacitors C2, C3, C4, and C5 are all grounded.

4. The single-cell battery charging protection circuit according to claim 1, characterized in that: The switch S1, capacitor C9, and capacitor C8 are all grounded.

5. A single-cell battery charging protection circuit according to claim 1, characterized in that: The source of MOS transistor A is connected to one end of capacitor C1 and VSS pin of chip U1. The drain of MOS transistor A is connected to the drain of MOS transistor B. The source of MOS transistor B is connected to resistor R2.

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