CN117374888A - Protection circuit, method and system for preventing battery overdischarge of equipment - Google Patents

Protection circuit, method and system for preventing battery overdischarge of equipment Download PDF

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Publication number
CN117374888A
CN117374888A CN202311354076.XA CN202311354076A CN117374888A CN 117374888 A CN117374888 A CN 117374888A CN 202311354076 A CN202311354076 A CN 202311354076A CN 117374888 A CN117374888 A CN 117374888A
Authority
CN
China
Prior art keywords
battery
equipment
state
controller
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311354076.XA
Other languages
Chinese (zh)
Inventor
朱从孟
杨明盛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lenovo Changfeng Technology Beijing Co Ltd
Original Assignee
Lenovo Changfeng Technology Beijing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lenovo Changfeng Technology Beijing Co Ltd filed Critical Lenovo Changfeng Technology Beijing Co Ltd
Priority to CN202311354076.XA priority Critical patent/CN117374888A/en
Publication of CN117374888A publication Critical patent/CN117374888A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention provides a protection circuit, a method and a system for preventing over-discharge of a battery of equipment, which relate to the technical field of battery protection and comprise the following steps: a battery having an electricity meter therein; the controller is connected with the fuel gauge through an I2C bus; the switch circuit is connected with a VBAT+ pin of the battery; the switch circuit is connected with the controller, receives a control signal sent by the controller, and controls the switch circuit to be turned off according to the monitored equipment state and the battery electric quantity, so that the technical effects of avoiding the damage of the battery and the equipment caused by the excessive discharge of the battery under the condition of no work are achieved, and the technical problem that the excessive discharge of the battery is caused because the battery is not effectively monitored when a management circuit of the equipment does not work in the prior art is solved.

Description

Protection circuit, method and system for preventing battery overdischarge of equipment
Technical Field
The invention relates to the technical field of battery protection, in particular to a protection circuit, a protection method and a protection system for preventing over-discharge of a battery of equipment.
Background
After the lithium battery is over-discharged, the raw materials are damaged, so that bulges (flatulence) are easy to generate, the battery is permanently damaged, and the risk of influencing personal safety due to explosion exists.
The battery is matched with the equipment in the use process, has a complete management mechanism, and can prevent the battery from being overdischarged, but in the shutdown state of the equipment, the battery is continuously output outwards due to leakage current of a circuit of the equipment, the management circuit of the equipment does not work, the battery is not effectively monitored, and the overdischarge phenomenon of the battery is easily caused.
The rated voltage of the lithium battery is generally 3.7V, the low-voltage protection point of the battery is generally 3.0V (or lower, different batteries are different), the battery itself generally has a hardware judgment circuit, and when the battery voltage reaches the threshold value, the battery itself can turn off the external output current.
The following problems exist in the prior art: 1) The voltage of the battery is not proportional to the electric quantity, the battery voltage is used as the electric quantity to detect inaccurately, the actual electric quantity of the battery cannot be reflected correctly, and particularly, the voltage of the battery drops faster, namely, the fluctuation is larger during high-power output. 2) When the small battery outputs high power, the battery electric quantity can be enough to support the electronic system to work for a period of time, but due to the transient high power of the electronic system, the battery voltage instantaneously drops to a low voltage threshold value, so that the battery misjudges and automatically shuts off the external output current. 3) The leakage current of the device is generally in the milliamp level, and the battery power can be wasted.
Disclosure of Invention
The purpose of the application is to provide a protection circuit, a method and a system for preventing the battery from being over-discharged, which solve the technical problem that the battery is over-discharged because the battery is not effectively monitored when a management circuit of the equipment does not work in the prior art.
In view of the above, the present application provides a protection circuit, a method and a system for preventing over-discharge of a battery of a device.
In a first aspect, the present application provides a protection circuit for preventing a battery from being overdischarged by a device, the protection circuit for preventing a battery from being overdischarged by a device, comprising: a battery having an electricity meter therein; the controller is connected with the fuel gauge through an I2C bus; the switch circuit is connected with a VBAT+ pin of the battery; the switch circuit is connected with the controller and receives a control signal sent by the controller.
Preferably, the controller is an MCU (micro control unit).
Preferably, the controller includes a timer.
In a second aspect, the present application provides a protection method for preventing a battery from being overdischarged in a device, where the method is applied to the protection circuit for preventing a battery from being overdischarged in a device in the first aspect, and the method includes: acquiring a system power-off signal through a controller; according to the system power-off signal, the controller judges and determines the on-off state of the equipment; determining a control rule of a control instruction according to the on-off state of the equipment; and monitoring by using a protection circuit based on the control rule, and generating a control instruction when the control rule is met, wherein the control instruction is used for controlling the switch circuit to be in a closed state.
Preferably, determining a control rule of a control instruction according to the on-off state of the device includes: when the equipment is in a power-on/off state, setting interval acquisition time, and acquiring battery electric quantity of a battery through a controller based on the interval acquisition time to obtain battery monitoring electric quantity; setting the over-discharge protection electric quantity of the battery according to the electric quantity information of the battery; and when the battery monitoring electric quantity reaches the battery overdischarge protection electric quantity, generating the control instruction.
Preferably, determining a control rule of a control instruction according to the on-off state of the device includes: and when the equipment on-off state is the shutdown state, acquiring the control instruction, and enabling the switching circuit to be in the off state.
Preferably, determining a control rule of a control instruction according to the on-off state of the device includes: when the equipment on-off state is shutdown, acquiring shutdown leakage current data and battery capacity of the equipment; according to the shutdown leakage current data and the battery capacity of the equipment, calculating and obtaining the discharge protection time of the equipment when the equipment is shut down; and when the discharge protection time is reached, acquiring the control instruction, and enabling the switching circuit to be in a closed state.
Preferably, determining a control rule of a control instruction according to the on-off state of the device includes: when the equipment is in an on-off state, acquiring the over-discharge protection time of the equipment battery according to the battery capacity and the equipment operation consumption current data; and when the counted time of the timer reaches the over-discharge protection time of the battery of the equipment, acquiring the control instruction, and enabling the switching circuit to be in a closed state.
In a third aspect, the present application provides a protection system for a device for preventing over-discharge of a battery, the system being applied to the method in the second aspect, the system comprising:
the signal acquisition module is used for acquiring a system power-off signal through the controller;
the state judging module is used for judging and determining the on-off state of the equipment according to the system power-off signal;
the control rule determining module is used for determining a control rule of a control instruction according to the on-off state of the equipment;
and the control execution module is used for monitoring by using the protection circuit based on the control rule, and generating a control instruction when the control rule is met, wherein the control instruction is used for controlling the switch circuit to be in a closed state.
One or more technical solutions provided in the present application have at least the following technical effects or advantages:
the protection circuit, the method and the system for preventing the over-discharge of the battery of the equipment are provided by arranging an electricity meter inside the battery; the controller is connected with the fuel gauge through an I2C bus; setting a switch circuit to be connected with a VBAT+ pin of the battery; the switching circuit is connected with the controller, and a system power-off signal is acquired through the controller; according to the system power-off signal, the controller judges and determines the on-off state of the equipment; determining a control rule of a control instruction according to the on-off state of the equipment; and monitoring by using a protection circuit based on the control rule, and performing circuit closing control by using a switching circuit when the setting requirement of overdischarge is met.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
Fig. 1 is a schematic structural diagram of a protection circuit for preventing a battery from being overdischarged in an apparatus according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a protection method for preventing a battery from being over-discharged for a device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a protection system for preventing over-discharge of a battery of a device according to an embodiment of the present application.
Reference numerals illustrate: the device comprises a battery 1, an electricity meter 2, a switching circuit 3, a controller 4, a signal acquisition module 11, a state judgment module 12, a control rule determination module 13 and a control execution module 14.
Detailed Description
The application provides a protection circuit, a method and a system for preventing the battery from being over-discharged for solving the technical problem that the battery is over-discharged because the battery is not effectively monitored when a management circuit of the equipment does not work in the prior art.
Aiming at the technical problems, the technical scheme provided by the application has the following overall thought:
by providing an electricity meter inside the battery; the controller is connected with the fuel gauge through an I2C bus; setting a switch circuit to be connected with a VBAT+ pin of the battery; the switch circuit is connected with the controller, receives a control signal sent by the controller, judges the state of the equipment according to the monitored equipment power-off signal, and combines the monitored battery electric quantity, when the setting requirement of overdischarge is met, the switch circuit is used for conducting circuit closing control.
Having introduced the basic principles of the present application, the technical solutions herein will now be clearly and fully described with reference to the accompanying drawings, it being apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments of the present application, and it is to be understood that the present application is not limited by the example embodiments described herein. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present application are shown.
Embodiment one: fig. 1 is a schematic structural diagram of a protection circuit for preventing a battery from being over-discharged, and this embodiment of the application provides a protection circuit for preventing a battery from being over-discharged, as shown in fig. 1, the protection circuit for preventing a battery from being over-discharged includes: a battery 1, a controller 4 and a switching circuit 3.
The battery 1 is internally provided with an electricity meter 2;
the controller 4 is connected with the fuel gauge 2 through an I2C bus;
the switch circuit 3 is connected with a VBAT+ pin of the battery 1;
the switch circuit 3 is connected to the controller 4, and receives a control signal sent by the controller 4.
Further, the controller 4 is an MCU (micro control unit).
Further, the controller 5 includes a timer.
As shown in fig. 1, a switch circuit 3 and an ultra-low power consumption MCU, i.e., a controller 4, are added to a power output line outside the battery 1. The MCU adopts the battery 1 to supply power, can ensure that the MCU always works normally when the battery outputs normally. The MCU adopts a query mode, and obtains the electricity quantity of the primary battery every time (such as 100 milliseconds) through the I2C bus and the electricity quantity meter inside the battery, thereby achieving the purpose of monitoring the electricity quantity of the battery in real time.
Meanwhile, the MCU controller has the function of a timer, and can calculate time. Under normal conditions, the MCU outputs an EN signal to control the switch circuit to be in a conducting state. The system power-off signal is input to the MCU, and the MCU can judge whether the equipment is in a power-off state or a normal working state according to the signal. When judging that the equipment is in a shutdown state, the MCU outputs an EN signal, and controls the switch circuit 3 to be in a shutdown state so as to avoid overdischarge of the battery, thereby achieving the technical effects of effectively monitoring the battery state and carrying out overdischarge protection on the battery based on a monitoring result.
The switch circuit 3 can be realized by devices such as a triode, a MOS tube, a relay and the like.
The controller 4 may be the MCU described above, or may be a device capable of realizing the above functions, such as CPU, CPLD, ASIC.
In summary, the protection circuit for preventing the battery from being over-discharged has the following beneficial effects:
and 1, the defect of management functions of the battery under the condition of equipment shutdown is overcome, the over-discharge protection of the battery is realized under the condition of equipment shutdown, and the expenditure of equipment leakage current is reduced.
2, ensuring that the battery is not damaged and personal safety is not caused by over-discharge.
The function is simple to realize, excessive expenditure is not needed, and the capacity or time threshold value set by closing can be easily changed through software according to actual conditions.
4, the existing battery is not required to be changed, and is easily realized through an external simple circuit.
5) The ultra-low power consumption MCU power consumption can reach microampere level, and when the equipment does not need to be powered, the method can realize the power consumption waste of milliamp level in the equipment shutdown state.
Embodiment two: the embodiment of the application provides a protection method for preventing a battery of a device from being over-discharged, which is applied to the protection circuit in the first embodiment, as shown in fig. 2, and includes:
step S10: acquiring a system power-off signal through a controller;
step S20: according to the system power-off signal, the controller judges and determines the on-off state of the equipment;
step S30: determining a control rule of a control instruction according to the on-off state of the equipment;
step S40: and monitoring by using a protection circuit based on the control rule, and generating a control instruction when the control rule is met, wherein the control instruction is used for controlling the switch circuit to be in a closed state.
In a normal state, the controller 4 outputs an EN signal to control the switching circuit to be in a conducting state, a system power-off signal is input to the controller 4, and the controller 4 can judge whether the equipment is in a shutdown state or a normal working state according to the received system power-off signal; different control rules are determined according to the on-off state of the equipment, the control rules are sent to the controller 4, the electric quantity state of the equipment is continuously monitored, if the control requirements in the control rules are met, a control instruction is generated to control the switching circuit to be closed, overdischarge is avoided when the battery 1 is closed, and the service life of the battery and the use safety of the equipment are ensured.
Further, according to the on-off state of the device, determining a control rule of the control instruction includes:
when the equipment is in a power-on/off state, setting interval acquisition time, and acquiring battery electric quantity of a battery through a controller based on the interval acquisition time to obtain battery monitoring electric quantity;
setting the over-discharge protection electric quantity of the battery according to the electric quantity information of the battery;
and when the battery monitoring electric quantity reaches the battery overdischarge protection electric quantity, generating the control instruction.
Further, according to the on-off state of the device, determining a control rule of the control instruction includes:
when the equipment is in an on-off state, acquiring the over-discharge protection time of the equipment battery according to the battery capacity and the equipment operation consumption current data;
and when the counted time of the timer reaches the over-discharge protection time of the battery of the equipment, acquiring the control instruction, and enabling the switching circuit to be in a closed state.
Specifically, when the on-off state of the device is an un-off state, such as a sleep state and a standby state, the control rule sets the logic of the switch circuit to be turned off according to the battery power:
the over-discharge protection electric quantity of the battery is set to be x% (the percentage of the actual electric quantity and the battery capacity), the MCU obtains the electric quantity of the battery through the I2C bus (CLK and DATA), and when the electric quantity of the battery is about to be x%, the MCU outputs an EN signal to close the switch circuit, and the battery is not powered externally.
Further, according to the on-off state of the device, determining a control rule of the control instruction includes:
and when the equipment on-off state is the shutdown state, acquiring the control instruction, and enabling the switching circuit to be in the off state.
Further, according to the on-off state of the device, determining a control rule of the control instruction includes:
when the equipment on-off state is shutdown, acquiring shutdown leakage current data and battery capacity of the equipment;
according to the shutdown leakage current data and the battery capacity of the equipment, calculating and obtaining the discharge protection time of the equipment when the equipment is shut down;
and when the discharge protection time is reached, acquiring the control instruction, and enabling the switching circuit to be in a closed state.
Specifically, when the on-off state of the equipment is the off state, two control rules exist, namely direct control logic and switching circuit closing logic according to time setting, wherein the direct control logic directly generates a control instruction as long as the equipment is monitored to be in the off state, and the switching circuit is controlled to be in the off state.
The logic of the switch circuit is closed according to time setting: according to the shutdown leakage current value of the equipment to which the battery is applied and the battery capacity, the time T from the discharge of the battery to the battery protection point under the equipment shutdown condition is actually measured or calculated, and the time T does not cause the battery to be in an overdischarge state.
The same effect can be achieved by both logics, and for a client, the control logics of different shutdown states can be set according to the use habit of the client or the use requirement of the device. If the client device is used uninterruptedly, the device can be set according to time when the device is turned on or off frequently, and if the battery is controlled when the battery reaches the overdischarge threshold value, the switch circuit is not controlled every time the device is turned off. If the client is not used for a period of time after shutdown, namely the condition of frequent startup and shutdown is not adopted, the control of the switch circuit is directly carried out after the shutdown is set, so that the state of the battery is ensured, and meanwhile, the use requirement of the user is ensured.
Embodiment III: based on the same inventive concept as the protection method for preventing the battery from being over-discharged in the foregoing embodiment, the embodiment of the present application provides a protection system for preventing the battery from being over-discharged in the device, as shown in fig. 3, where the system includes:
the signal acquisition module 11 is used for acquiring a system power-off signal through the controller;
the state judging module 12 is used for judging and determining the on-off state of the equipment according to the system power-off signal;
a control rule determining module 13, configured to determine a control rule of a control instruction according to the on-off state of the device;
the control execution module 14 is configured to monitor with a protection circuit based on the control rule, and generate a control instruction when the control rule is satisfied, where the control instruction is used to control the switch circuit to be in a closed state.
Further, the control execution module 14 is further configured to implement the following steps:
when the equipment is in a power-on/off state, setting interval acquisition time, and acquiring battery electric quantity of a battery through a controller based on the interval acquisition time to obtain battery monitoring electric quantity;
setting the over-discharge protection electric quantity of the battery according to the electric quantity information of the battery;
and when the battery monitoring electric quantity reaches the battery overdischarge protection electric quantity, generating the control instruction.
Further, the control execution module 14 is further configured to implement the following steps:
and when the equipment on-off state is the shutdown state, acquiring the control instruction, and enabling the switching circuit to be in the off state.
Further, the control execution module 14 is further configured to implement the following steps:
when the equipment on-off state is shutdown, acquiring shutdown leakage current data and battery capacity of the equipment;
according to the shutdown leakage current data and the battery capacity of the equipment, calculating and obtaining the discharge protection time of the equipment when the equipment is shut down;
and when the discharge protection time is reached, acquiring the control instruction, and enabling the switching circuit to be in a closed state.
Various modifications and specific examples of the protection method for preventing the battery from being overdischarged in the first embodiment are equally applicable to the protection system for preventing the battery from being overdischarged in the second embodiment, and those skilled in the art will be aware of the implementation method of the protection system for preventing the battery from being overdischarged in the second embodiment through the foregoing detailed description of the protection method for preventing the battery from being overdischarged in the second embodiment, so that the description will not be repeated for brevity.
Although the present application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary illustrations of the present application and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the present application and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims (8)

1. A protection circuit for preventing over-discharge of a battery of a device, the protection circuit for preventing over-discharge of a battery of a device comprising:
a battery having an electricity meter therein;
the controller is connected with the fuel gauge through an I2C bus;
the switch circuit is connected with a VBAT+ pin of the battery;
the switch circuit is connected with the controller and receives a control signal sent by the controller.
2. The protection circuit for preventing over-discharge of a battery of a device according to claim 1, wherein the controller is an MCU (micro control unit).
3. The device battery over-run protection circuit of claim 1, wherein the controller comprises a timer.
4. A method for protecting a device against battery overdischarge, which is applied to the protection circuit for protecting a device against battery overdischarge according to any one of claims 1 to 3, the method comprising:
acquiring a system power-off signal through a controller;
according to the system power-off signal, the controller judges and determines the on-off state of the equipment;
determining a control rule of a control instruction according to the on-off state of the equipment;
and monitoring by using a protection circuit based on the control rule, and generating a control instruction when the control rule is met, wherein the control instruction is used for controlling the switch circuit to be in a closed state.
5. The method of claim 4, wherein determining a control rule for a control instruction based on the device on-off state comprises:
when the equipment is in a power-on/off state, setting interval acquisition time, and acquiring battery electric quantity of a battery through a controller based on the interval acquisition time to obtain battery monitoring electric quantity;
setting the over-discharge protection electric quantity of the battery according to the electric quantity information of the battery;
and when the battery monitoring electric quantity reaches the battery overdischarge protection electric quantity, generating the control instruction.
6. The method of claim 4, wherein determining a control rule for a control instruction based on the device on-off state comprises:
and when the equipment on-off state is the shutdown state, acquiring the control instruction, and enabling the switching circuit to be in the off state.
7. The method of claim 4, wherein determining a control rule for a control instruction based on the device on-off state comprises:
when the equipment on-off state is shutdown, acquiring shutdown leakage current data and battery capacity of the equipment;
according to the shutdown leakage current data and the battery capacity of the equipment, calculating and obtaining the discharge protection time of the equipment when the equipment is shut down;
and when the discharge protection time is reached, acquiring the control instruction, and enabling the switching circuit to be in a closed state.
8. A protection system for a device against over-discharge of a battery, the system being applied in the method of any of claims 4-7, the system comprising:
the signal acquisition module is used for acquiring a system power-off signal through the controller;
the state judging module is used for judging and determining the on-off state of the equipment according to the system power-off signal;
the control rule determining module is used for determining a control rule of a control instruction according to the on-off state of the equipment;
and the control execution module is used for monitoring by using the protection circuit based on the control rule, and generating a control instruction when the control rule is met, wherein the control instruction is used for controlling the switch circuit to be in a closed state.
CN202311354076.XA 2023-10-18 2023-10-18 Protection circuit, method and system for preventing battery overdischarge of equipment Pending CN117374888A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311354076.XA CN117374888A (en) 2023-10-18 2023-10-18 Protection circuit, method and system for preventing battery overdischarge of equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311354076.XA CN117374888A (en) 2023-10-18 2023-10-18 Protection circuit, method and system for preventing battery overdischarge of equipment

Publications (1)

Publication Number Publication Date
CN117374888A true CN117374888A (en) 2024-01-09

Family

ID=89407254

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311354076.XA Pending CN117374888A (en) 2023-10-18 2023-10-18 Protection circuit, method and system for preventing battery overdischarge of equipment

Country Status (1)

Country Link
CN (1) CN117374888A (en)

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