CN115459372A

CN115459372A - Charging wake-up circuit after lithium battery protection and use method thereof

Info

Publication number: CN115459372A
Application number: CN202110640750.5A
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: 2022-12-09

Abstract

The invention relates to the technical field of circuit design, in particular to a charging wake-up circuit after lithium battery protection and a using method thereof. According to the invention, after the discharge MOS is turned off, the discharge MOS is turned on, so that the protection board discharges to the outside, the lithium battery charger is activated, the problem that the protection board can be charged by connecting the charger when over-discharge, over-current, short-circuit or power-on is solved, and the timing circuit is used on the protection board and adopts a timing circuit built by discrete hardware devices. 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

Lithium battery protection post-charging wake-up circuit and use method thereof

Technical Field

The invention relates to the technical field of circuit design, in particular to a lithium battery protection post-charging wake-up circuit and a use method thereof.

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, all lithium battery chargers on the market have zero output, and can only activate charging through a lithium battery. In this case, the battery cannot be charged and can be activated only using a general charger. It is also possible to use a software smart protection board to intermittently turn on the battery discharge to the outside.

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.

Disclosure of Invention

The invention aims to provide a charging wake-up circuit after lithium battery protection and a using method thereof, and aims to solve the problems that a common lithium battery charger is high in risk, a software intelligent protection board is high in cost and poor in operability.

In order to achieve the above object, in one aspect, the present invention provides the following technical solutions: the utility model provides a lithium cell protection back awakening circuit that charges, includes lithium cell, lithium cell charger, is used for monitoring electric core state's protection shield control circuit and is used for turning on the intermittent type nature discharge circuit who discharges the MOS under the circumstances that the MOS appears turning off discharging in the protection part, intermittent type nature 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 type of the resistor RB1 is 2k omega.

Preferably, the resistor R9 is an NC resistor.

On the other hand, the invention also provides a use method of the charging wake-up circuit after the lithium battery protection, which comprises the following steps: and after the discharge MOS is turned off, the discharge MOS is turned on to enable the protection board to discharge outwards, the lithium battery charger is activated, and the lithium battery is intermittently turned on to reduce power consumption in consideration of standby power consumption of the lithium battery.

Preferably, the step of intermittently turning on the circuit comprises: 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.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the charging wake-up circuit after lithium battery protection and the using method thereof, after the discharging MOS is turned off, the discharging MOS is turned on, 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 turning on, wherein the intermittent turning on circuit is based on the principle that 30s within 1 minute sends out 12V level driving discharging MOS to the outside to activate the charger, and the other 30s outputs 0V to reduce the power consumption.

2. According to the charging wake-up circuit after lithium battery protection and the use method thereof, the problem that the protection board can be charged by connecting a charger when the protection board is overdischarged, overcurrent, short-circuited or electrified is solved, and the timing circuit is used on the protection board and is built by adopting hardware discrete devices. 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 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 an intermittent start-up circuit according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

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

the utility model provides a lithium cell protection back awakening circuit that charges, includes lithium cell, lithium cell charger, is used for monitoring electric core state's protection shield control circuit and is used for turning on the intermittent type nature discharge circuit who discharges the MOS under the circumstances that the MOS appears turning off discharging in the protection part, intermittent type nature discharge circuit includes timing circuit, electric capacity C17, C18, resistance RA1, RB1 and R9.

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

Specifically, the type of the resistor RA1 is 2k Ω, and the type of 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 invention also provides a use method of the charging wake-up circuit after lithium battery protection, which comprises the following steps: after the MOS that discharges turns off appearing, turn on 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 is opened and is reduced the consumption: the principle of intermittent starting circuit is as follows: by a timing circuit, 30s within 1 minute sends out 12V level driving discharge MOS to activate the charger, and the other 30s outputs 0V to reduce power consumption.

The invention relates to a charging wake-up circuit after lithium battery protection, which solves the problem that a protection board can be charged by connecting a charger when the protection board is over-discharged, over-current, short-circuited or electrified, and a timing circuit is used for the protection board and adopts a timing circuit built by discrete hardware devices. 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, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present 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 core and an intermittent discharge circuit for starting a discharge MOS under the condition that the protection part is turned off, wherein the intermittent discharge circuit comprises a timing circuit, capacitors C17 and C18, resistors 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 type of the resistor RA1 is 2k omega.

5. The post-lithium battery protection charge wake-up circuit of claim 1, further comprising: the type of 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.

7. A method for using a lithium battery protection post-charge wake-up circuit, comprising the lithium battery protection post-charge wake-up circuit of any of claims 1-6: the method is characterized in that: the method comprises the following steps: and after the discharge MOS is turned off, the discharge MOS is turned on to enable the protection board to discharge outwards, the lithium battery charger is activated, and the lithium battery is intermittently turned on to reduce power consumption in consideration of standby power consumption of the lithium battery.

8. The method for using the post-lithium battery protection charge wake-up circuit according to claim 7, wherein: the method for intermittently starting the circuit comprises the following steps: 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.