CN215009699U

CN215009699U - Wake-up circuit for charging after lithium battery protection

Info

Publication number: CN215009699U
Application number: CN202121282561.7U
Authority: CN
Inventors: 贾宁浅; 秦兴
Original assignee: Jiangsu Linning Electronic Technology Co ltd
Current assignee: Jiangsu Linning Electronic Technology Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-12-03
Anticipated expiration: 2031-06-08

Abstract

The utility model belongs to the technical field of the circuit design technique and specifically relates to a lithium cell protection back charge awakening circuit, including lithium cell, lithium battery charger, be used for monitoring electric core state's protection shield control circuit and be used for appearing turning off the charging current detection circuitry who opens the MOS that discharges under the condition of discharging the MOS in the protection part, charging current detection circuitry includes timing circuit, electric capacity C17, C18, resistance RAl, RBl and R9. The utility model discloses after the MOS that discharges turn-offs appearing, open the MOS that discharges, make the protection shield discharge to the outside, the activation lithium battery charger, the protection shield is solved and is crossed to put, overflow, short circuit or go up the time and connect the charger and can charge, timing circuit uses at the protection shield, the timing circuit that the discrete device of hardware of adoption took. The invention protects the application of the timing circuit in the lithium battery protection board, reduces the manufacturing cost, reduces the standby power consumption of the lithium battery, and reduces the power consumption by intermittent starting.

Description

Wake-up circuit for charging after lithium battery protection

Technical Field

The utility model relates to a circuit design technical field specifically is a lithium cell protection back awakening circuit that charges.

Background

Currently, protective plates on the market are in the presence of protection, for example: the situation of no electricity charge can occur when over-discharge, over-current, short circuit or power-on occur. The protection board on the market can enter load locking when overdischarging, overcurrent, short circuit or power on, and after entering the load locking, the protection board can not be output outwards. However, the lithium battery chargers on the market have zero output externally, and can only activate charging through the lithium battery. In this case, the battery cannot be charged and can be activated only using a general charger. In addition, the intelligent protection board of software can be used to intermittently start the discharge of the battery.

The ordinary charger adopted in the market has high risk and large danger coefficient, and easily causes the ignition and explosion of the lithium battery. The lithium battery charger adopts a software intelligent protection board, and the software intelligent protection board has the following defects:

1. the power consumption is high, the normal working current of the software intelligent protection board is 50mA, the difference is too large compared with the current of 200uA of a common protection board, and the battery is easy to empty;

2. the cost is high, and the price of the software intelligent protection board is more than 2 times that of the common protection board;

3. the feasibility operation is poor, the program adaptation is required to be modified for different applications, and the program can not be directly substituted for use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium cell protection back awakening circuit that charges to the problem that the ordinary charger risk of present lithium cell is high, software intelligence protection shield is with high costs, the operability is poor is put forward in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a lithium cell protection back charge awaken circuit, includes lithium cell, lithium cell charger, is used for monitoring the protection shield control circuit of electric core state and is used for turning on the intermittent type discharge circuit of discharging the MOS under the circumstances that the MOS that discharges appears shutting down in the protection part, intermittent type discharge circuit includes timing circuit, electric capacity C17, C18, resistance RA1, RB1 and R9.

Preferably, the type of the capacitor C17 is 104/50V.

Preferably, the type of the capacitor C18 is 104/50V.

Preferably, the resistor RA1 has a model of 2k Ω.

Preferably, the resistor RB1 is 2k omega in type.

Preferably, the resistor R9 is an NC resistor.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the charging wake-up circuit after the protection of the lithium battery, after the discharging MOS is turned off, the discharging MOS is started, the protection board is enabled to discharge outwards, the lithium battery charger is activated, the standby power consumption of the lithium battery is considered, the power consumption is reduced by intermittent starting, the intermittent starting circuit is based on the principle that 30s within 1 minute externally sends 12V level driving discharging MOS to activate the charger, and the OV is output for the other 30s to reduce the power consumption.

2. In the charging wake-up circuit after the protection of the lithium battery, the problem that the protection board is connected with a charger to charge when the protection board is over-discharged, over-current, short-circuit or electrified is solved, and the timing circuit is used on the protection board and is taken by a hardware discrete device. The invention protects the application of the timing circuit in the lithium battery protection board, reduces the manufacturing cost, reduces the standby power consumption of the lithium battery, and reduces the power consumption by intermittent starting.

Drawings

Fig. 1 is a schematic diagram of the circuit principle of the present invention;

FIG. 2 is a circuit diagram of the circuit connection of the present invention;

FIG. 3 is a schematic diagram of the present invention;

fig. 4 is a schematic diagram of the intermittent open circuit of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-4, the present invention provides the following technical solutions:

Furthermore, the type of the capacitor C17 is 104/50V, and the type of the capacitor C18 is 104/50V.

Specifically, the resistor RA1 is 2k Ω, and the resistor RB1 is 2k Ω.

Further, the resistor R9 is an NC resistor.

It should be noted that the timing circuit may be a timing IC chip, or may be a discrete device circuit.

The specific principle of the wake-up circuit for charging after lithium battery protection in this embodiment is as follows: after the MOS that discharges turns off appearing, open the MOS that discharges, make the protection shield discharge to the outside, activate lithium battery charger, consider the stand-by power consumption of lithium cell, intermittent type nature opens the reduction power consumption, wherein intermittent type nature opens the circuit principle: through the timing circuit, 30s within 1 minute sends out 12V level driving discharge MOS to the outside to activate the charger, and the other 30s outputs 0V to reduce power consumption.

The utility model discloses a lithium cell protection back charge awaken circuit up solves the protection shield and connects the charger to charge when putting, overflowing, short circuit or going up, and timing circuit uses at the protection shield, the timing circuit that the hardware discrete device of adoption took. The invention protects the application of the timing circuit in the lithium battery protection board, reduces the manufacturing cost, reduces the standby power consumption of the lithium battery, and reduces the power consumption by intermittent starting.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a wake-up circuit charges after lithium cell protection which characterized in that: the battery protection circuit comprises a lithium battery, a lithium battery charger, a protection board control circuit for monitoring the state of a battery cell and an intermittent discharge circuit for starting a discharge MOS under the condition that the protection part turns off the discharge MOS, wherein the intermittent discharge circuit comprises a timing circuit, capacitors C17 and C18, a resistor RA1, RB1 and R9.

2. The post-lithium battery protection charge wake-up circuit of claim 1, further comprising: the type of the capacitor C17 is 104/50V.

3. The post-lithium battery protection charge wake-up circuit of claim 1, further comprising: the type of the capacitor C18 is 104/50V.

4. The post-lithium battery protection charge wake-up circuit of claim 1, further comprising: the resistor RA1 is 2k omega.

5. The post-lithium battery protection charge wake-up circuit of claim 1, further comprising: the resistor RB1 is 2k omega.

6. The post-lithium battery protection charge wake-up circuit of claim 1, further comprising: the resistor R9 is an NC resistor.