CN114256892A - Battery protection circuit, method, battery and medium - Google Patents
Battery protection circuit, method, battery and medium Download PDFInfo
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- CN114256892A CN114256892A CN202011004601.1A CN202011004601A CN114256892A CN 114256892 A CN114256892 A CN 114256892A CN 202011004601 A CN202011004601 A CN 202011004601A CN 114256892 A CN114256892 A CN 114256892A
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- 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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- 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
- H02J7/00304—Overcurrent protection
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- 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]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- 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
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- Microelectronics & Electronic Packaging (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses a protection circuit and a method for a battery, the battery and a medium. The protection circuit of battery is coupled electric core, and the protection circuit includes: the drain electrode of the charging switch device is coupled with the anode of the battery cell; the drain electrode of the discharging switching device is coupled with the source electrode of the charging switching device; the detection circuit is coupled with the anode of the battery cell, the grid of the charging switch device and the grid of the discharging switch device; the control circuit is coupled with the detection circuit and the source electrode of the discharge switching device; when the detection circuit detects that the electric quantity parameter of the battery core is lower than the threshold value, the discharge switch device is controlled to be turned off, so that the control circuit is in a power-off state; or when the control circuit judges that the connection disconnection time of the battery and the electric equipment exceeds the preset time, the control circuit controls the discharge switch device to be switched off so that the control circuit is in a power-off state. Through the mode, the power consumption of the battery in an idle state can be reduced, the risk of overdischarge of the battery is reduced, and the storage time of the battery is prolonged.
Description
Technical Field
The present disclosure relates to the field of battery protection technologies, and in particular, to a battery protection circuit, a battery protection method, a battery, and a computer storage medium.
Background
In order to ensure the use safety, special battery management circuits are designed in the independently packaged rechargeable batteries, and the management circuits need to consume the electric quantity of the batteries when working, and the more complicated the management circuits are, the larger the electric consumption is, such as an intelligent battery pack with an ammeter or an explosion-proof battery pack with special requirements on safety protection. In the use or storage process of the battery, the battery cell is damaged due to deep overdischarge or long-time incapability of being charged after overdischarge, and the service life of the battery is further shortened.
Disclosure of Invention
The application mainly provides a battery protection circuit, a battery protection method, a battery and a medium, which are used for solving the technical problem of over-discharge of an over-current cell in the storage process of the battery in the related technology.
In order to solve the technical problem, the application adopts a technical scheme that: a protection circuit for a battery is provided. The protection circuit of battery is coupled electric core, and the protection circuit includes: the drain electrode of the charging switch device is coupled with the anode of the battery cell; the drain electrode of the discharging switching device is coupled with the source electrode of the charging switching device; the detection circuit is coupled with the anode of the battery cell, the grid of the charging switch device and the grid of the discharging switch device; the control circuit is coupled with the detection circuit and the source electrode of the discharge switching device; when the detection circuit detects that the electric quantity parameter of the battery core is lower than the threshold value, the discharge switch device is controlled to be turned off, so that the control circuit is in a power-off state; or when the control circuit judges that the connection disconnection time of the battery and the load exceeds the preset time, the control circuit controls the discharge switch device to be switched off so that the control circuit is in a power-off state.
In order to solve the technical problem, the application adopts a technical scheme that: a method for protecting a battery is provided. The method comprises the following steps: and in response to the fact that the electric quantity parameter of the battery core is detected to be lower than a threshold value, or in response to the fact that the connection disconnection time of the battery and the load exceeds the preset time, controlling the discharge switching device to be turned off to disconnect the power supply input of the control circuit.
In order to solve the technical problem, the application adopts a technical scheme that: a battery is provided. The battery comprises a battery core and the protection circuit of the battery.
In order to solve the technical problem, the application adopts a technical scheme that: a computer storage medium is provided. The computer storage medium stores a computer program that is executed to implement the steps of the above-described battery protection method.
The beneficial effect of this application is: be different from prior art, this application detection circuitry is coupled the positive pole of electric core, charging switch device and discharging switch device, control circuit is coupled the source electrode of discharging switch device, when detection circuitry detects the electric quantity parameter of electric core and is less than the threshold value, or when control circuitry judges that the off-time of electric core and load exceeds preset time, detection circuitry control discharging switch device turn-offs, so that control circuitry and electric core disconnection are in the outage state, thereby reduce the electric quantity consumption of detection circuitry and control circuitry under the no charging discharge state, can reduce the risk of overdischarging among the battery storage process, improve the time of depositing of battery, the life of extension battery.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a protection circuit of a battery provided in the present application;
fig. 2 is a schematic flow chart of a first embodiment of a battery protection method provided in the present application;
fig. 3 is a schematic flow chart of a second embodiment of a battery protection method provided by the present application;
FIG. 4 is a schematic structural diagram of an embodiment of a computer storage medium provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second" and "third" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a protection circuit of a battery provided in the present application.
In this embodiment, the battery 10 may include a battery cell 11 and a protection circuit 12. The battery cell 11 is a power storage portion of the battery 10, and includes a positive electrode and a negative electrode. The number of the battery cells 11 in the schematic diagram is merely illustrative, and the specific number is subject to practical application, which is not limited in this application. The protection circuit 12 includes a charge switching device Qc, a discharge switching device Qd, a detection circuit 121, and a control circuit 122. The drain of the charge switch device Qc is coupled to the positive electrode of the battery cell 11, the source of the charge switch device Qc is coupled to the drain of the discharge switch device Qd, the detection circuit 121 is coupled to the positive electrode of the battery cell 11, the gate of the charge switch device Qc, and the gate of the discharge switch device Qd, and the control circuit 122 is coupled to the detection circuit 121 and to the source of the discharge switch device Qd.
Specifically, the detection circuit 121 includes a detection chip U1, and a detection power supply pin VC, a charge switch driving pin CHG, and a discharge switch driving pin DSG provided on the detection chip U1. The control circuit 122 includes a control chip U2 and a control power pin VCC disposed on the control chip U2. The detection power supply pin VC is coupled with the positive electrode of the battery cell 11, the charging switch driving pin CHG is coupled with the grid electrode of the charging switch device Qc, the discharging switch driving pin DSG is coupled with the grid electrode of the discharging switch device Qd, and the control power supply pin VCC is coupled with the source electrode of the discharging switch device Qd.
In some embodiments, the power supply state of the control circuit 122 may be controlled according to the power parameter of the battery cell 11. Specifically, when the detection power supply pin VC of the detection chip U1 detects that the parameter of the electric quantity of the battery cell 11 is lower than the threshold value, the discharge switch driving pin DSG outputs a low level to the gate of the discharge switch device Qd, so that the discharge switch device Qd is turned off. The control circuit 122 is disconnected from the positive electrode of the battery cell 11, so that the control circuit 122 is in a power-off state.
The charge parameter may be a voltage value of the battery cell 11 or a remaining charge of the battery cell 11. The threshold of the electric quantity parameter may be set according to actual needs (such as different environmental temperatures, different capacities of the battery cell 11, and the like), which is not limited in this application.
In other embodiments, the power supply states of the detection circuit 121 and the control circuit 122 may also be controlled according to the disconnection time of the battery 10 from the load. Specifically, the detection chip U1 further includes a detection communication pin, the control chip U2 includes a control communication pin, and the detection communication pin is connected to the control communication pin through the data line SDA and the control line SCL. When the control chip U2 of the control circuit 122 determines that the disconnection time of the battery 10 from the load exceeds the preset time, the control chip U2 generates a control signal. The control communication pin outputs a control signal to the detection communication pin. The detection circuit 121 receives and responds to the control signal to control the discharge switch driving pin DSG to output a low level to the gate of the discharge switch device Qd, so that the discharge switch device Qd is turned off. The connection between the control circuit 122 and the battery cell 11 is thus disconnected, so that the control circuit 122 is in a power-off state.
The control chip U2 may further include a Data pin Data, and the protection circuit 12 may further include a discharge port 123, where the discharge port 123 includes a positive discharge terminal P + and a negative discharge terminal P-. The discharging positive terminal P + is coupled with the source electrode of the discharging switching device Qd, and the discharging negative terminal P-is grounded. The control electrode S of the discharge port 123 is coupled to the Data pin Data of the control circuit 122, and when the battery 10 is disconnected from the load, the control chip U2 receives a signal indicating that the battery 10 is disconnected from the load through the Data pin Data, and records the time of disconnection, so as to calculate the disconnection time of the battery 10 from the load.
In some embodiments, the control chip U2 has a timing function, and the control chip U2 itself can directly read the disconnection time of the battery 10 from the load.
Optionally, when the control chip U2 does not have a timing function, the protection circuit 12 may further include a clock circuit (not shown). The clock circuit comprises a clock chip, and a clock power supply pin and a clock communication pin which are arranged on the clock chip. The clock power supply pin is coupled to the positive electrode of the battery cell 11, and the clock communication pin is coupled to the detection communication pin and the control communication pin. The clock chip can record time data, such as year, month, day, week, hour, minute and second, and has the characteristic of low power consumption. The clock circuit outputs time data to a control communication pin of the control chip U2 through a clock communication pin. After the control chip U2 obtains the time data, it can determine whether the disconnection time of the battery 10 from the load exceeds the preset time according to the time data. When the control circuit 122 determines that the connection disconnection time exceeds the preset time, the detection circuit 121 switches to the off state, and controls the discharge switching device Qd to be turned off, so that the control circuit 122 is in the power-off state.
The preset time may be set according to the capacity of the battery 10, for example, the preset time of the battery 10 with a smaller capacity of the battery 10 may be relatively smaller, for example, 5 days, 10 days, 1 month, etc. The preset time for the battery 10 in which the capacity of the battery 10 is large may be relatively large, for example, 15 days, 20 days, 1 month, 2 months, etc.
Optionally, the control circuit 122 may further include a low dropout regulator LDO coupled to the control power pin VCC of the control chip U2 to stabilize the voltage input to the control chip U2. The low dropout regulator LDO has the characteristics of low power consumption, small packaging volume, low noise and the like, and can further reduce the power consumption of the protection circuit 12.
Further, the protection circuit 12 further includes a charging port 124, and the charging port 124 includes a charging plus terminal CH + and a charging minus terminal CH-. The charging positive terminal CH + is coupled with the source electrode of the discharging switching device Qd, and the charging negative terminal CH-is grounded. The charging port is connected to an external power source, that is, when the battery is charged, the source of the discharging switching device Qd is at a high level, and when the voltage difference between the source and the gate of the discharging switching device Qd is higher than the conduction threshold, the discharging switching device Qd is turned on to recover the power supply of the protection circuit 12.
The discharge port 123 is coupled to the detection circuit 121, so that when the battery is connected to the load, the detection circuit detects that the load is connected to the discharge port 123, and controls to turn on the discharge switching device Qd, so that the battery cell can supply power to the load and the control circuit 122. Specifically, the discharging positive terminal P + of the discharging port 123 is coupled to the sensing input pin PACK of the detecting chip U1, and the sensing input pin PACK of the detecting chip U1 is used for sensing whether the protection circuit 12 is connected to a load or an external power source. When the sensing input pin PACK of the detection chip U1 senses that the discharging positive terminal P + is connected with the load, a high level is output to the gate of the discharging switch device Qd through the discharging switch driving pin DSG to turn on the discharging switch device Qd, recover the power supply of the battery cell 11 to the protection circuit 12, and supply power to the load by the battery 10.
In this embodiment, the detection circuit 121 is coupled to the positive electrode of the battery cell 11, the charge switch device Qc and the discharge switch device Qd, the control circuit 122 is coupled to the source of the discharge switch device Qd, when the detection circuit 121 detects that the electric quantity parameter of the battery cell 11 is lower than the threshold, or when the control circuit 122 determines that the disconnection time of the battery 10 from the load exceeds the preset time, the detection circuit 121 is switched to the off state and controls the discharge switch device Qd to be turned off, so that the disconnection of the control circuit 122 from the battery cell 11 is in the off state, thereby reducing the consumption of the detection circuit 121 and the control circuit 122 on the remaining electric quantity of the battery 10 in the non-charge discharge state, reducing the risk of over-discharge in the storage process of the battery 10, improving the storage time and safety of the battery 10, and prolonging the service life of the battery 10. And, the electric quantity parameter and the preset time can be set according to actual conditions, such as storage environment of the battery 10, battery electric quantity and the like, and are more flexible.
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a first embodiment of a battery protection method according to the present application. The embodiment comprises the following steps:
s201: the detection circuit detects the electric quantity parameter of the battery core.
In this embodiment, the battery may include a battery cell and a protection circuit. The battery core is an electricity storage part of the battery and comprises a positive electrode and a negative electrode. The protection circuit comprises a charging switch device, a discharging switch device, a detection circuit and a control circuit. The protection circuit comprises a charging switch device, a discharging switch device, a detection circuit and a control circuit. The drain electrode of the charging switch device is coupled with the positive electrode of the battery core, the source electrode of the charging switch device is coupled with the drain electrode of the discharging switch device, the detection circuit is coupled with the positive electrode of the battery core, the grid electrode of the charging switch device and the grid electrode of the discharging switch device, and the control circuit is coupled with the detection circuit and coupled with the source electrode of the discharging switch device.
Specifically, the detection circuit comprises a detection chip, and a detection power supply pin, a charging switch driving pin and a discharging switch driving pin which are arranged on the detection chip. The control circuit comprises a control chip and a control power supply pin arranged on the control chip. The detection power supply pin is coupled with the anode of the battery core, the charging switch driving pin is coupled with the grid electrode of the charging switch device, the discharging switch driving pin is coupled with the grid electrode of the discharging switch device, and the control power supply pin is coupled with the source electrode of the discharging switch device.
In this embodiment, the electric quantity parameter of the electric core is detected through the detection power supply pin of the detection circuit.
The charge parameter may be a voltage value of the cell or a remaining charge of the cell. The threshold of the electric quantity parameter may be set according to actual needs (such as different environmental temperatures, different cell capacities, and the like), which is not limited in this application.
S202: the detection circuit compares the electrical quantity parameter with a threshold value.
After the detection chip of the detection circuit acquires the electric quantity parameter of the battery core, the electric quantity parameter is compared with the threshold value. If the power parameter is lower than the threshold, S203 is executed. And if the electric quantity parameter is higher than or equal to the threshold value, continuously detecting the electric quantity parameter of the battery cell.
S203: and if the electric quantity parameter is lower than the threshold value, the power supply input of the control circuit is disconnected.
When a detection power pin of the detection circuit detects that the electric quantity parameter of the battery core is lower than a threshold value, the detection chip controls a discharge switch driving pin to output a low level to a grid electrode of a discharge switch device, so that the discharge switch device is turned off. The connection between the control circuit and the positive electrode of the battery cell is disconnected, so that the control circuit is in a power-off state.
Further, when the battery is connected to an external power source, the discharge switching device is turned on to restore the power supply of the protection circuit. Specifically, the protection circuit further comprises a charging circuit, the charging circuit comprises a charging port, the anode of the charging port is coupled to the source of the discharging switch device, and the cathode of the charging port is grounded. When the charging port is connected with an external power supply, the source electrode of the discharging switching device is at a high level, the discharging switching device is conducted when the voltage difference between the source electrode and the grid electrode of the discharging switching device is higher than a conduction threshold value, and the control circuit recovers power supply and is also switched to a working state.
In this embodiment, this application detection circuitry is coupled the positive pole of electric core, charge switch device and discharge switch device, control circuit is coupled the source electrode of discharge switch device, when detection circuitry detects that the electric quantity parameter of electric core is less than the threshold value, detection circuitry control discharge switch device turn-offs, so that control circuitry and electric core disconnection are in the outage state, thereby reduce detection circuitry and control circuitry to the consumption of battery residual capacity under the no charge discharge state, reduce the risk that the battery overdischarged, can improve the latency and the security of battery, the life of extension battery. And, the electric quantity parameter can be according to actual conditions such as battery storage environment, battery electric quantity etc. and set up, and is more nimble.
Referring to fig. 3, fig. 3 is a schematic flow chart of a battery protection method according to a second embodiment of the present application. The embodiment comprises the following steps:
s301: the control circuit acquires the disconnection time of the battery and the load.
In this embodiment, the battery may include a battery cell and a protection circuit. The battery core is an electricity storage part of the battery and comprises a positive electrode and a negative electrode. The protection circuit comprises a discharge switching device, a detection circuit and a control circuit. The discharge switch device is coupled with the positive pole of electric core, and detection circuitry is coupled with the positive pole and the discharge switch device of electric core, and control circuit is coupled with detection circuitry, and is coupled with the positive pole of the electric core that discharges through the discharge switch device.
Specifically, the detection circuit comprises a detection chip, and a detection power supply pin, a charging switch driving pin and a discharging switch driving pin which are arranged on the detection chip. The control circuit comprises a control chip and a control power supply pin arranged on the control chip. The detection power supply pin is coupled with the anode of the battery core, the charging switch driving pin is coupled with the grid electrode of the charging switch device, the discharging switch driving pin is coupled with the grid electrode of the discharging switch device, and the control power supply pin is coupled with the source electrode of the discharging switch device.
In some embodiments, the control chip has a timing function, and can record the time when the battery is disconnected from the load and read the current time, so as to calculate the disconnection time of the battery from the load.
In other embodiments, when the control chip does not have the timing function, the time of the clock circuit connected to the control circuit may be read to obtain the disconnection time of the battery and the load. Specifically, the detection chip further comprises a detection communication pin, the control chip comprises a control communication pin, and the detection communication pin is coupled to the control communication pin. The protection circuit may further include a clock circuit. The clock circuit comprises a clock chip, and a clock power supply pin and a clock communication pin which are arranged on the clock chip. The clock power supply pin is coupled with the anode of the battery core, and the clock communication pin is coupled with the detection communication pin and the control communication pin. The clock chip can record time data, such as year, month, day, week, hour, minute and second, and has protection characteristics. The clock circuit outputs time data to a control communication pin of the control chip through the clock communication pin. The control chip makes a difference with the time data when the battery and the load are disconnected according to the currently acquired time data, and the connection disconnection time of the battery and the load can be obtained.
S302: the control circuit compares the connection disconnection time with a preset time.
The control circuit obtains the connection disconnection time and the preset time. If the connection disconnection time is greater than the preset time, S303 is executed. And if the connection and disconnection time is less than or equal to the preset time, continuously acquiring the connection and disconnection time of the battery and the load.
S303: and if the connection disconnection time is longer than the preset time, the control circuit sends a control signal to the detection circuit, and the control signal is used for controlling the discharge switching device to be switched off so as to disconnect the power supply input of the control circuit.
And when the control chip of the control circuit judges that the connection and disconnection time of the battery core and the load exceeds the preset time, the control chip generates a control signal. The control communication pin outputs a control signal to the detection communication pin. The detection chip receives and responds to the control signal through the detection communication pin, and controls the discharge switch driving pin to output low level to the grid electrode of the discharge switch device, so that the discharge switch device is turned off. The connection between the control circuit and the positive electrode of the battery cell is disconnected, so that the control circuit is in a power-off state.
In some embodiments, the discharge switching device is turned on to restore power to the protection circuit when the battery is connected to the external power source after the discharge switching device is turned off. Specifically, the protection circuit further comprises a charging circuit, the charging circuit comprises a charging port, the anode of the charging port is coupled to the source of the discharging switch device, and the cathode of the charging port is grounded. When the charging port is connected with an external power supply, the source electrode of the discharging switching device is at a high level, the discharging switching device is conducted when the voltage difference between the source electrode and the grid electrode of the discharging switching device is higher than a conduction threshold value, and the control circuit recovers power supply and is also switched to a working state.
In other embodiments, the discharge switching device is turned on to restore power to the protection circuit when the battery is connected to the load after the discharge switching device is turned off. Specifically, the protection circuit further comprises a discharge port including a discharge positive terminal and a discharge negative terminal. The discharging port is coupled with the detection circuit, so that when the battery is connected with the load, the detection circuit detects that the load is connected with the discharging port, and the detection circuit controls the conduction and coupling of the discharging switch device, so that the battery core can supply power for the load and the control circuit. Specifically, the discharging positive terminal of the discharging port is coupled to an inductive input pin of the detection chip, and the inductive input pin of the detection chip is used for sensing whether the protection circuit is connected with a load or an external power supply. When the sensing input pin of the detection chip senses that the discharging positive end is connected with the load, the high level is output to the grid electrode of the discharging switch device through the discharging switch driving pin so as to switch on the discharging switch device, recover the power supply of the battery core to the protection circuit and realize the power supply of the battery to the load.
In this embodiment, the detection circuit is coupled with the positive pole of electric core, charge switch device and discharge switch device, control circuit is coupled with the source electrode of discharge switch device, when control circuit judges that the disconnection time of electric core and load exceeds the preset time, detection circuit control discharge switch device turn-off, so that control circuit and electric core disconnection are in the outage state, thereby reduce detection circuit and control circuit to the consumption of battery residual capacity under the no charge discharge state, reduce the risk that the battery overdischarges, can improve the depositing time and the security of battery, the life of extension battery. In addition, the preset time can be set according to actual conditions such as battery storage environment, battery electric quantity and the like, and the method is more flexible.
For the method of the above embodiment, it may exist in the form of a computer program, so that the present application provides a computer storage medium, please refer to fig. 4, and fig. 4 is a schematic structural diagram of an embodiment of the computer storage medium provided in the present application. The computer storage medium 400 of the present embodiment stores therein a computer program 401 that can be executed to implement the method in the above-described embodiments.
The computer storage medium 400 of this embodiment may be a Read-Only Memory (ROM), a Random Access Memory (RAM), and other media that can store program instructions, or may also be a server that stores the program instructions, and the server may send the stored program instructions to other devices for operation, or may self-operate the stored program instructions.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a module or a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (13)
1. A protection circuit of a battery, wherein the protection circuit is coupled to a battery cell, and the protection circuit comprises:
a charging switch device, a drain of which is coupled to the anode of the battery cell;
a discharge switching device, a drain of the discharge switching device being coupled to a source of the charge switching device;
the detection circuit is coupled with the anode of the battery cell, the grid electrode of the charging switching device and the grid electrode of the discharging switching device;
a control circuit coupled to the detection circuit and the source of the discharge switching device;
when the detection circuit detects that the electric quantity parameter of the battery cell is lower than a threshold value, the discharge switch device is controlled to be turned off, so that the control circuit is in a power-off state; or
And when the control circuit judges that the connection disconnection time of the battery and the electric equipment exceeds the preset time, the control circuit controls the discharge switch device to be switched off so that the control circuit is in a power-off state.
2. The protection circuit according to claim 1, wherein the detection circuit comprises a detection chip and a detection power supply pin, a charging switch driving pin and a discharging switch driving pin which are arranged on the detection chip, and the control circuit comprises a control chip and a control power supply pin which is arranged on the control chip; the charging switch driving pin is coupled with a grid electrode of the charging switch device, the discharging switch driving pin is coupled with a grid electrode of the discharging switch device, and the control power supply pin is coupled with a source electrode of the discharging switch device.
3. The protection circuit of claim 2, wherein the sense chip further comprises a sense communication pin, the control chip comprises a control communication pin, and the sense communication pin is coupled to the control communication pin; the detection communication pin is used for receiving a control signal output by the control communication pin, and the control signal is used for controlling the discharge switch device to be turned off so that the control circuit is in a power-off state.
4. The protection circuit of claim 1, further comprising a charging port comprising a positive charging terminal coupled to the source of the discharge switching device and a negative charging terminal coupled to ground;
and when the charging port is connected with an external power supply, the discharging switch device is switched on to recover the power supply of the protection circuit.
5. The protection circuit of claim 1, further comprising a discharge port comprising a positive discharge terminal and a negative discharge terminal, the positive discharge terminal being coupled to the gate of the discharge switching device and the detection circuit, the negative discharge terminal being grounded;
when the discharge port is connected with a load, the detection circuit conducts the discharge switch device to recover the power supply of the protection circuit.
6. The protection circuit of claim 1, wherein the control chip further comprises a data pin, wherein the protection circuit further comprises a discharge circuit, wherein the discharge circuit comprises a discharge port, wherein an anode of the discharge port is coupled to a source of the discharge switching device, and a control electrode of the discharge port is coupled to the data pin.
7. A protection method of a battery is characterized in that the battery comprises a battery core and a protection circuit, the protection circuit comprises a detection circuit, a control circuit and a discharge switching device, and the method comprises the following steps:
and in response to the fact that the electric quantity parameter of the battery core is detected to be lower than a threshold value, or in response to the fact that the connection disconnection time of the battery and the load exceeds the preset time, controlling the discharge switching device to be turned off so as to disconnect the power supply input of the control circuit.
8. The method of claim 7, wherein the controlling the discharge switching device to turn off to disconnect a power supply input of the control circuit in response to detecting that the charge parameter of the cell is below a threshold value comprises:
the detection circuit detects the electric quantity parameter of the battery cell;
the detection circuit compares the electric quantity parameter with the threshold value;
if the electric quantity parameter is lower than the threshold value, the detection circuit controls the discharge switch device to be switched off so as to disconnect the power supply input of the control circuit.
9. The method of claim 7, wherein controlling the discharge switching device to turn off to disconnect the power supply input of the control circuit in response to determining that the disconnection time of the battery from the load exceeds a preset time comprises:
the control circuit acquires the disconnection time of the battery and the load;
the control circuit compares the off-time with the preset time;
and if the disconnection time is greater than the preset time, the control circuit sends a control signal to the detection circuit, and the control signal is used for enabling the detection circuit to control the discharge switch device to be switched off so as to disconnect the power supply input of the control circuit.
10. The method of claim 7, further comprising:
and responding to the battery to be connected with an external power supply, and turning on the discharge switching device to recover the power supply of the protection circuit.
11. The method of claim 7, further comprising:
and responding to the battery connection load, and turning on the discharge switching device to recover the power supply of the protection circuit.
12. A battery, characterized in that the protection battery comprises a cell and a protection circuit of the battery according to any one of claims 1 to 6, the cell being coupled to the protection circuit.
13. A computer storage medium, characterized in that the computer storage medium stores a computer program which is executed to implement the steps of the method according to any one of claims 7 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004601.1A CN114256892A (en) | 2020-09-22 | 2020-09-22 | Battery protection circuit, method, battery and medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004601.1A CN114256892A (en) | 2020-09-22 | 2020-09-22 | Battery protection circuit, method, battery and medium |
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| Publication Number | Publication Date |
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| CN114256892A true CN114256892A (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011004601.1A Pending CN114256892A (en) | 2020-09-22 | 2020-09-22 | Battery protection circuit, method, battery and medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118539539A (en) * | 2024-04-12 | 2024-08-23 | 重庆市紫建电子股份有限公司 | Battery charging protection circuit |
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2020
- 2020-09-22 CN CN202011004601.1A patent/CN114256892A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118539539A (en) * | 2024-04-12 | 2024-08-23 | 重庆市紫建电子股份有限公司 | Battery charging protection circuit |
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