High-voltage battery protection circuit

Abstract

The utility model discloses a high-voltage battery protection circuit which comprises a chip U1, a pin 1 of the chip U1 is connected with a capacitor C18, one end of the capacitor C18 far away from the chip U1 is connected with a resistor R18, a pin 3 of the chip U1 is connected with a capacitor C17 and a resistor R17, a pin 4 of the chip U1 is connected with a capacitor C16, a resistor R1g and a resistor R16, a triode Q17 is connected between the resistor R1g and the resistor R16, a base electrode of the triode Q17 is connected with the resistor R1g, and a base electrode of the triode Q17 is connected with the resistor R1g. An emitter of the triode Q17 is connected with a resistor R16, and a collector of the triode Q17 is connected with a resistor Ra7 and a resistor R11g. According to the high-voltage battery protection circuit, when input voltage exceeds a preset level, the battery protection circuit can automatically disconnect an output part or a load from the circuit, so that the circuit is protected from overvoltage; damage to the service life of the battery caused by overcharge can be effectively avoided, normal use of equipment is guaranteed, the high-voltage condition of the battery can be found in time, and dangerous accidents are avoided.

Description

TECHNICAL FIELD

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

[0002] Battery is a kind of device that chemical energy or physical energy is converted into electric energy. It is usually composed of two different components of electrochemically active electrode positive and negative, is soaked in electrolyte. When external circuit is connected, battery releases energy by chemical reaction, provides electric energy. But existing battery is not convenient to automatically disconnect the connection of output part or load and circuit when voltage exceeds preset level, lead to battery is vulnerable to damage, further influence the service life of battery. To solve the above problems, a high voltage battery protection circuit is proposed here. SUMMARY

[0003] The utility model is to provide a kind of high voltage battery protection circuit, to solve the problem raised in the above background technique.

[0004] In order to achieve the above object, the utility model provides following technical scheme: a high -voltage battery protection circuit, including chip U1, the pin 1 of chip U1 is connected with the capacitor C18, the one end of capacitor C18 away from chip U1 is connected with resistance R18, the pin 3 of chip U1 is connected with capacitor C17 and resistance R17, the pin 4 of chip U1 is connected with capacitor C16, resistance R1g and resistance R16, be connected with triode Q17 between resistance R1g and resistance R16, and the base of triode Q17 is connected with resistance R1g, the emitter of triode Q17 is connected with resistance R16, the collector of triode Q17 is connected with resistance Ra7 and resistance R11g, the pin 5 of chip U1 is connected with capacitor C15, resistance R1f and resistance R15, be connected with triode Q16 between resistance R1f and resistance R15, and the base of triode Q16 is connected with resistance R1f, the emitter of triode Q16 is connected with resistance R15, the collector of triode Q16 is connected with resistance Ra6 and resistance R11f, the pin 6 of chip U1 is connected with capacitor C140, resistance R1e and resistance R14, be connected with triode Q15 between resistance R1e and resistance R14, and the base of triode Q15 is connected with resistance R1e, the emitter of triode Q15 is connected with resistance R14, the collector of triode Q15 is connected with resistance Ra5 and resistance R11e, the pin 7 of chip U1 is connected with capacitor C13, resistance R1d and resistance R13, be connected with triode Q14 between resistance R1d and resistance R13, and the base of triode Q14 is connected with resistance R1d, the emitter of triode Q14 is connected with resistance R13, the collector of triode Q14 is connected with resistance Ra4 and resistance R11d, the pin 8 of chip U1 is connected with capacitor C12, resistance R1e and resistance R12, be connected with triode Q13 between resistance R1e and resistance R12, and the base of triode Q13 is connected with resistance R1e, the emitter of triode Q13 is connected with resistance R12, the collector of triode Q13 is connected with resistance Ra3 and resistance R11, the pin 9 of chip U1 is connected with capacitor C11, resistance R1b and resistance R11, be connected with triode Q12 between resistance R1b and resistance R11, and the base of triode Q12 is connected with resistance R1b, the emitter of triode Q12 is connected with resistance R11, the collector of triode Q12 is connected with resistance Ra2 and resistance R11b, the pin 10 of chip U1 is connected with capacitor C10, resistance R1a and resistance R10, be connected with triode Q11 between resistance R1a and resistance R10, and the base of triode Q11 is connected with resistance R1a, the emitter of triode Q11 is connected with resistance R10, the collector of triode Q11 is connected with resistance Ra1 and resistance R11a, resistance R10 is connected with resistance R19,The resistance R11g is connected with the firewire L17, the resistance R11f is connected with the firewire L16, the resistance R11e is connected with the firewire L15, the resistance R11d is connected with the firewire L14, the resistance R11c is connected with the firewire L13, the resistance R11b is connected with the firewire L12, and the resistance R11a is connected with the firewire L11, the battery protection circuit is provided with multiple transistors and diodes, when the input voltage exceeds the preset level, the output part or the load is automatically disconnected from the circuit, thereby protecting the circuit from overvoltage, which can effectively avoid the damage of excessive charging to the battery life, protect the normal use of the equipment, and also can timely find the high voltage condition of the battery to avoid dangerous accidents.

[0005] Preferably, the pin 11 of the chip U1 is connected with the capacitor C19, the pin 12 of the chip U1 is connected with the resistance R1h and the capacitor C19, and the resistance R1h is connected with the resistance R01.

[0006] Preferably, the pin 13 of the chip U1 is connected with the resistance R1i, the resistance R1i is connected with the mos tube Q01, the resistance R1i is connected with the gate of the mos tube Q01, the mos tube Q01 is connected in parallel with the capacitor C1b, the mos tube Q01 is connected with the resistance R01, the pin 14 of the chip U1 is connected with the transistor Q19, the pin 14 of the chip U1 is connected with the emitter of the transistor Q19, the transistor Q19 is connected with the resistance R1k and the diode D2, the base of the transistor Q19 is connected with the resistance R1k, the collector of the transistor Q19 is connected with the diode D2, the diode D2 is connected with the resistance R11 and the mos tube Q02, the diode D2 and the resistance R11 are connected with the gate of the mos tube Q02, the mos tube Q02 is connected in parallel with the capacitor C1c, the drain of the mos tube Q02 is connected with the drain of the mos tube Q01, and the source of the mos tube Q02 is connected with the source of the mos tube Q01, respectively connected with the capacitor C1b and the capacitor C1c.

[0007] Preferably, the pin 15 of the chip U1 is connected with the resistance R1m, and the resistance R1m is connected with the mos tube Q02.

[0008] Preferably, the pin 18 of the chip U1 is connected with the resistance R1v, the pin 19 of the chip U1 is connected with the resistance R1u, the pin 20 of the chip U1 is connected with the resistance R1t, and the resistance R1v, the resistance R1u and the resistance R1t are connected with the resistance RT1.

[0009] Preferably, the pin 21 of the chip U1 is connected with the capacitor C1a, and the pin 22 of the chip U1 is connected with the resistance R1s.

[0010] Preferably, the pin 23 of the chip U1 is connected with a resistor R1r, and the pin 24 of the chip U1 is connected with a resistor R1q.

[0011] Compared with the prior art, the battery protection circuit can automatically disconnect the connection between the output part or load and the circuit when the input voltage exceeds the preset level, thereby protecting the circuit from overvoltage, effectively avoiding damage to the service life of the battery caused by overcharging, ensuring normal use of the equipment, and timely discovering the high-voltage condition of the battery to avoid dangerous accidents. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The circuit diagram of the utility model. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model.

[0014] Please refer to Figure 1The utility model provides a kind of high voltage battery protection circuit, including chip U1, the pin 1 of chip U1 is connected with capacitor C18, the end of capacitor C18 away from chip U1 is connected with resistance R18, the pin 3 of chip U1 is connected with capacitor C17 and resistance R17, the pin 4 of chip U1 is connected with capacitor C16, resistance R1g and resistance R16, resistance R1g and resistance R16 between are connected with triode Q17, and the base of triode Q17 is connected with resistance R1g, the emitter of triode Q17 is connected with resistance R16, the collector of triode Q17 is connected with resistance Ra7 and resistance R11g, the pin 5 of chip U1 is connected with capacitor C15, resistance R1f and resistance R15, resistance R1f and resistance R15 between are connected with triode Q16, and the base of triode Q16 is connected with resistance R1f, the emitter of triode Q16 is connected with resistance R15, the collector of triode Q16 is connected with resistance Ra6 and resistance R11f, the pin 6 of chip U1 is connected with capacitor C140, resistance R1e and resistance R14, resistance R1e and resistance R14 between are connected with triode Q15, and the base of triode Q15 is connected with resistance R1e, the emitter of triode Q15 is connected with resistance R14, the collector of triode Q15 is connected with resistance Ra5 and resistance R11e, the pin 7 of chip U1 is connected with capacitor C13, resistance R1d and resistance R13, resistance R1d and resistance R13 between are connected with triode Q14, and the base of triode Q14 is connected with resistance R1d, the emitter of triode Q14 is connected with resistance R13, the collector of triode Q14 is connected with resistance Ra4 and resistance R11d, the pin 8 of chip U1 is connected with capacitor C12, resistance R1e and resistance R12, resistance R1e and resistance R12 between are connected with triode Q13, and the base of triode Q13 is connected with resistance R1e, the emitter of triode Q13 is connected with resistance R12, the collector of triode Q13 is connected with resistance Ra3 and resistance R11, the pin 9 of chip U1 is connected with capacitor C11, resistance R1b and resistance R11, resistance R1b and resistance R11 between are connected with triode Q12, and the base of triode Q12 is connected with resistance R1b, the emitter of triode Q12 is connected with resistance R11, the collector of triode Q12 is connected with resistance Ra2 and resistance R11b, the pin 10 of chip U1 is connected with capacitor C10, resistance R1a and resistance R10, resistance R1a and resistance R10 between are connected with triode Q11, and the base of triode Q11 is connected with resistance R1a, the emitter of triode Q11 is connected with resistance R10, the collector of triode Q11 is connected with resistance Ra1 and resistance R11a, resistance R10 is connected with resistance R19, resistance R11g is connected with firewire L17, resistance R11f is connected with firewire L16, resistance R11e is connected with firewire L15, resistance R11d is connected with firewire L14, resistance R11c is connected with firewire L13,The battery protection circuit is provided with a plurality of triodes and diodes, when the input voltage exceeds the preset level, the output part or load is automatically disconnected from the circuit, thereby protecting the circuit from overvoltage, which can effectively avoid the damage of excessive charging to the battery life, protect the normal use of the equipment, and also can timely find the high voltage condition of the battery to avoid dangerous accidents.

[0015] The pin 11 of the chip U1 is connected with the capacitor C19, the pin 12 of the chip U1 and the capacitor C19 are connected with the resistor R1h, the resistor R1h is connected with the resistor R01, the pin 13 of the chip U1 is connected with the resistor R1i, the resistor R1i is connected with the mos tube Q01, the resistor R1i is connected with the gate of the mos tube Q01, the mos tube Q01 is connected in parallel with the capacitor C1b, the mos tube Q01 is connected with the resistor R01, the pin 14 of the chip U1 is connected with the triode Q19, and the pin 14 of the chip U1 is connected with the emitter of the triode Q19, the triode Q19 is connected with the resistor R1k and the diode D2, the base of the triode Q19 is connected with the resistor R1k, the collector of the triode Q19 is connected with the diode D2, the diode D2 is connected with the resistor R11 and the mos tube Q02, and the diode D2 and the resistor R11 are connected with the gate of the mos tube Q02, the mos tube Q02 is connected in parallel with the capacitor C1c, the drain of the mos tube Q02 is connected with the drain of the mos tube Q01, and the source of the mos tube Q02 is connected with the source of the mos tube Q01 respectively with the capacitor C1b and the capacitor C1c.

[0016] The pin 15 of the chip U1 is connected with the resistor R1m, the resistor R1m is connected with the mos tube Q02, the pin 18 of the chip U1 is connected with the resistor R1v, the pin 19 of the chip U1 is connected with the resistor R1u, the pin 20 of the chip U1 is connected with the resistor R1t, the resistor R1v, the resistor R1u and the resistor R1t are connected with the resistor RT1, the pin 21 of the chip U1 is connected with the capacitor C1a, the pin 22 of the chip U1 is connected with the resistor R1s, the pin 23 of the chip U1 is connected with the resistor R1r, and the pin 24 of the chip U1 is connected with the resistor R1q.

[0017] In use, the battery protection circuit is provided with a plurality of triodes and diodes, when the input voltage exceeds the preset level, the output part or load is automatically disconnected from the circuit, thereby protecting the circuit from overvoltage, which can effectively avoid the damage of excessive charging to the battery life, protect the normal use of the equipment, and also can timely find the high voltage condition of the battery to avoid dangerous accidents.

[0018] Although the utility model has been explained 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. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high voltage battery protection circuit comprising a chip U1, characterized in that: The pin 1 of the chip U1 is connected with a capacitor C18, the far end of the capacitor C18 is connected with a resistor R18, the pin 3 of the chip U1 is connected with a capacitor C17 and a resistor R17, the pin 4 of the chip U1 is connected with a capacitor C16, a resistor R1g and a resistor R16, the resistor R1g and the resistor R16 are connected with a triode Q17, the base of the triode Q17 is connected with the resistor R1g, the emitter of the triode Q17 is connected with the resistor R16, the collector of the triode Q17 is connected with a resistor Ra7 and a resistor R11g, the pin 5 of the chip U1 is connected with a capacitor C15, a resistor R1f and a resistor R15, the resistor R1f and the resistor R15 are connected with a triode Q16, the base of the triode Q16 is connected with the resistor R1f, the emitter of the triode Q16 is connected with the resistor R15, the collector of the triode Q16 is connected with a resistor Ra6 and a resistor R11f, the pin 6 of the chip U1 is connected with a capacitor C140, a resistor R1e and a resistor R14, the resistor R1e and the resistor R14 are connected with a triode Q15, the base of the triode Q15 is connected with the resistor R1e, the emitter of the triode Q15 is connected with the resistor R14, the collector of the triode Q15 is connected with a resistor Ra5 and a resistor R11e, the pin 7 of the chip U1 is connected with a capacitor C13, a resistor R1d and a resistor R13, the resistor R1d and the resistor R13 are connected with a triode Q14, the base of the triode Q14 is connected with the resistor R1d, the emitter of the triode Q14 is connected with the resistor R13, the collector of the triode Q14 is connected with a resistor Ra4 and a resistor R11d, the pin 8 of the chip U1 is connected with a capacitor C12, a resistor R1e and a resistor R12, the resistor R1e and the resistor R12 are connected with a triode Q13, the base of the triode Q13 is connected with the resistor R1e, the emitter of the triode Q13 is connected with the resistor R12, the collector of the triode Q13 is connected with a resistor Ra3 and a resistor R11, the pin 9 of the chip U1 is connected with a capacitor C11, a resistor R1b and a resistor R11, the resistor R1b and the resistor R11 are connected with a triode Q12, the base of the triode Q12 is connected with the resistor R1b, the emitter of the triode Q12 is connected with the resistor R11, the collector of the triode Q12 is connected with a resistor Ra2 and a resistor R11b, the pin 10 of the chip U1 is connected with a capacitor C10, a resistor R1a and a resistor R10, the resistor R1a and the resistor R10 are connected with a triode Q11, the base of the triode Q11 is connected with the resistor R1a, the emitter of the triode Q11 is connected with the resistor R10, the collector of the triode Q11 is connected with a resistor Ra1 and a resistor R11a, the resistor R10 is connected with a resistor R19, the resistor R11g is connected with a live wire L17, the resistor R11f is connected with a live wire L16, the resistor R11e is connected with a live wire L15,The resistor R11d is connected with the firewire L14, the resistor R11c is connected with the firewire L13, the resistor R11b is connected with the firewire L12, and the resistor R11a is connected with the firewire L11.

2. A high voltage battery protection circuit according to claim 1, characterized in that: The pin 11 of the chip U1 is connected with a capacitor C19, the pin 12 of the chip U1 is connected with the capacitor C19 and a resistor R1h, and the resistor R1h is connected with a resistor R01.

3. A high voltage battery protection circuit according to claim 1, characterized in that: The pin 13 of the chip U1 is connected with a resistor R1i, the resistor R1i is connected with a mos Q01, the gate of the mos Q01 is connected with the resistor R1i, the mos Q01 is connected with a capacitor C1b in parallel, the mos Q01 is connected with the resistor R01, the pin 14 of the chip U1 is connected with a triode Q19, the pin 14 of the chip U1 is connected with the emitter of the triode Q19, the triode Q19 is connected with a resistor R1k and a diode D2, the base of the triode Q19 is connected with the resistor R1k, the collector of the triode Q19 is connected with the diode D2, the diode D2 is connected with a resistor R11 and a mos Q02, the diode D2 and the resistor R11 are connected with the gate of the mos Q02, the mos Q02 is connected with a capacitor C1c in parallel, the drain of the mos Q02 is connected with the drain of the mos Q01, and the source of the mos Q02 is connected with the source of the mos Q01, respectively connected with the capacitor C1b and the capacitor C1c.

4. A high voltage battery protection circuit according to claim 3, characterized in that: The pin 15 of the chip U1 is connected with a resistor R1m, and the resistor R1m is connected with the mos Q02.

5. A high voltage battery protection circuit according to claim 1, characterized in that: The pin 18 of the chip U1 is connected with a resistor R1v, the pin 19 of the chip U1 is connected with a resistor R1u, the pin 20 of the chip U1 is connected with a resistor R1t, and the resistor R1v, the resistor R1u and the resistor R1t are connected with a resistor RT1.

6. A high voltage battery protection circuit according to claim 1, characterized in that: The pin 21 of the chip U1 is connected with a capacitor C1a, and the pin 22 of the chip U1 is connected with a resistor R1s.

7. A high voltage battery protection circuit according to claim 1, characterized in that: The pin 23 of the chip U1 is connected with a resistor R1r, and the pin 24 of the chip U1 is connected with a resistor R1q.

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