CN210222517U - Control circuit of battery and battery - Google Patents

Abstract

The application discloses control circuit and battery of battery, this control circuit includes: a state detection circuit, a command generation circuit and a fuel gauge; the state detection circuit is connected with the instruction generation circuit and used for detecting the state of the battery and generating a corresponding state signal to be sent to the instruction generation circuit, wherein the state of the battery comprises an idle state and a non-idle state; the instruction generating circuit is connected with the fuel gauge and used for generating an instruction signal matched with the state signal and sending the instruction signal to the fuel gauge, wherein when the state signal indicates that the battery is in a non-idle state, a first instruction signal for indicating the fuel gauge to start is generated, and when the state signal indicates that the battery is in an idle state, a second instruction signal for indicating the fuel gauge to sleep or close is generated; the fuel gauge is used for monitoring the residual capacity of the battery after starting. Through the technical scheme, the leakage current of the battery is well reduced.

Description

Control circuit of battery and battery

Technical Field

The present disclosure relates to a battery, and more particularly to a battery control circuit and a battery.

Background

The battery is an important accessory in the mobile terminal, and the performance of the battery itself becomes an important index for the user experience. The gas gauge chip used in the battery motherboard often performs voltage and internal resistance sampling and performs external interactive communication, so that a large leakage current exists, which greatly shortens the transportation and storage time of the battery, and a scheme capable of solving the technical problems is needed.

Disclosure of Invention

The technical problem that this application mainly solved provides a technical scheme that can reduce ammeter leakage current.

In order to solve the above technical problem, the present application provides a control circuit of a battery, the control circuit including: a state detection circuit, a command generation circuit and a fuel gauge;

the state detection circuit is connected with the instruction generation circuit and is used for detecting the state of the battery and generating a corresponding state signal to be sent to the instruction generation circuit, wherein the state of the battery comprises an idle state and a non-idle state;

the instruction generating circuit is connected with the fuel gauge and used for generating an instruction signal matched with the state signal and sending the instruction signal to the fuel gauge, wherein when the state signal indicates that the battery is in a non-idle state, a first instruction signal for indicating the fuel gauge to start is generated, and when the state signal indicates that the battery is in an idle state, a second instruction signal for indicating the fuel gauge to sleep or shut down is generated;

the fuel gauge is used for monitoring the residual capacity of the battery after starting.

In order to solve the technical problem, the application further provides a battery, wherein the battery comprises an energy storage assembly and a control circuit, and the energy storage assembly is connected with the control circuit;

the energy storage assembly is used for storing electric energy and supplying power to an external load under the control of the control circuit;

the control circuit is a control circuit of the battery as described above.

The scheme includes that the control circuit of the battery comprises a state detection circuit, an instruction generation circuit and a fuel gauge, the state detection circuit is connected with the instruction generation circuit, the instruction generation circuit is connected with the fuel gauge, the state detection circuit is used for detecting whether the state of the battery is in an idle state or a non-idle state, the state detection circuit generates a corresponding state signal according to the detected state of the battery to send the state signal to the instruction generation circuit, the instruction generation circuit generates an instruction signal matched with the state signal and sends the instruction signal to the fuel gauge, the fuel gauge is switched to different states according to the state indication of the battery, when the state signal indicates that the battery is in the non-idle state, the instruction generation circuit generates a first instruction signal for indicating the fuel gauge to start, and when the state signal indicates that the battery is in the idle state, a second instruction signal for indicating the fuel gauge to sleep or shut down is generated, the fuel gauge is enabled to sleep or shut down when the battery is in an idle state so as to reduce the leakage current of the fuel gauge.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a control circuit of a battery according to the present application;

FIG. 2 is a schematic diagram of another embodiment of a control circuit for a battery according to the present application;

FIG. 3 is a schematic diagram of a control circuit of a battery according to another embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a control circuit of a battery according to another embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an embodiment of a battery according to 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. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. 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.

In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless 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 a control circuit of a battery according to an embodiment of the present disclosure.

In the present embodiment, the control circuit 100 of the battery provided in the present application includes: a state detection circuit 101, a command generation circuit 102, and a fuel gauge 103.

The state detection circuit 101 is connected to the instruction generation circuit 102, and is configured to detect a state of the battery 104 and generate a corresponding state signal to be sent to the instruction generation circuit 102. In the current embodiment, the states of the battery 104 include an idle state and a non-idle state, where the idle state of the battery 104 indicates that the battery 104 is not currently fastened with a terminal (not shown), such as possibly when the battery 104 is in a factory transportation stage; the non-idle state of the battery 104 indicates that the battery 104 is terminated. The status signal is a signal for informing the instruction generating circuit 102 of the current status of the battery 104, and since the status of the battery 104 includes an idle status and a non-idle status, the corresponding status signal also includes two different signals respectively indicating the two statuses of the battery 104.

Further, in another embodiment, a high signal and a low signal may be selected to indicate two states of the battery 104. If the high signal is selected to indicate that the current state of the battery 104 is a non-idle state, and the low signal is selected to indicate that the current state of the battery 104 is an idle state, it can be understood that in other embodiments, other types of signals may be selected to indicate the two states of the battery 104, which is not described in detail herein.

The command generating circuit 102 is connected to the electricity meter 103, and generates a command signal matching the received status signal, and transmits the command signal to the electricity meter 103 to instruct the electricity meter 103 to perform an action or enter a state. Specifically, when the state signal indicates that the battery 104 is in the non-idle state, a first instruction signal instructing the electricity meter 103 to start up is generated to activate the electricity meter 103 so that the electricity meter 103 can monitor the remaining amount of electricity of the battery 104. When the state signal indicates that the battery 104 is in an idle state, a second instruction signal for instructing the electricity meter 103 to sleep or shut down is generated to reduce the leakage current of the battery 104. Further, in the current embodiment, the instruction generating circuit 102 may be a single chip.

The electricity meter 103 is used for monitoring the remaining capacity of the battery 104 after the start-up, and feeding back the monitored remaining capacity of the battery 104 to a load (not shown). Specifically, in the current embodiment, when the instruction generating circuit 102 is a single chip, the electricity meter 103 may feed back the monitored remaining electricity quantity of the battery 104 to the single chip in the form of a signal, and the signal is processed by the single chip and fed back to the load. It is understood that, in another implementation, after the electricity meter 103 monitors the remaining capacity of the battery 104, the remaining capacity of the battery 104 may be directly fed back to the load side.

The control circuit 100 of the battery provided by the application detects the state of the battery 104 through the state detection circuit 101, generates a corresponding state signal to be sent to the instruction generation circuit 102 after detecting the state of the battery 104, and the instruction generation circuit 102 generates an instruction signal matched with the state signal and sends the instruction signal to the electricity meter 103. When the battery 104 is detected to be in the non-idle state, the instruction generating circuit 102 generates a first instruction signal for instructing the fuel gauge 103 to start up, and sends the first instruction signal to the fuel gauge 103 to instruct the fuel gauge 103 to start up for monitoring the remaining power of the battery 104, and when the battery 104 is detected to be in the idle state, the instruction generating circuit 102 generates a second instruction signal for instructing the fuel gauge 103 to sleep or shut down, so as to avoid more leakage current caused by continuous operation of the fuel gauge 103, thereby increasing the standby time of the battery 104 in the sleep state.

Referring to fig. 2, fig. 2 is a schematic structural diagram of another embodiment of a control circuit of a battery according to the present application. In the present embodiment, the control circuit 200 and the battery 204 together form a smart battery (not shown).

In the present embodiment, the state detection circuit includes a sensing circuit 201, and the sensing circuit 201 is connected to the command generation circuit 202, and is used for sensing whether the battery 204 is in contact with the load 210, and feeding back the sensing result to the command generation circuit 202 in the form of an electrical signal. Specifically, when the sensing circuit 201 senses that the battery 204 is in contact with the load 210, a signal indicating that the battery 204 is in a non-idle state is generated and sent to the instruction generating circuit 202, otherwise, when the sensing circuit 201 senses that the battery 204 is not in contact with the load 210, a signal indicating that the battery 204 is in an idle state is generated and sent to the instruction generating circuit 202, and the instruction generating circuit 202 generates a corresponding instruction according to the received signal and sends the instruction to the fuel gauge 203. The P + and P-terminals in fig. 2 identify the terminals from which the battery 204 supplies power to the load 210.

Further, please refer to fig. 3, wherein fig. 3 is a schematic structural diagram of a control circuit of a battery according to another embodiment of the present application. The P + and P-terminals in fig. 3 indicate the terminals for supplying power to the load 310 from the battery 304, the C-terminal indicates the power terminal of the instruction generating circuit, and the J-terminal indicates the sampling terminal of the fuel gauge for sampling the remaining amount of the battery.

In the current embodiment, the sensing circuit 201 in fig. 2 includes a switch 301. The first connection terminal a of the switch 301 is connected to a first power source terminal 307, and the second connection terminal B of the switch 301 is connected to the signal detection terminal D of the command generating circuit 302. The first command output end F of the command generating circuit 302 is connected to the command input end G of the fuel gauge 303, and is configured to output a command signal to the fuel gauge 303. When the battery 304 is in contact with the load 310, the first connection a of the switch 301 and the second connection B of the switch 301 are turned on, so that the signal of the first power source terminal 307 is transmitted to the instruction generating circuit 302 sequentially through the first connection a and the second connection B of the switch 301. In the present embodiment, when the battery 304 is in contact with the load 310, the signal sent to the command generating circuit 302 through the switch 301 is defined as a first level signal, and the voltage of the first level signal depends on the voltage of the first power source terminal 307 and the corresponding resistance value of the switch 301. When the command generating circuit 302 receives the first level signal through the signal detecting terminal D, it further generates a first command signal in response to the received first level signal, and outputs the first command signal to the fuel gauge 303 through the first command output terminal F. The first command signal is a signal for instructing the fuel gauge 303 to start. Further, when the battery 304 is continuously in contact with the load 310, the first connection end a and the second connection end B of the switch are continuously connected, and at this time, the first power end 307 continuously sends the first level signal to the command generating circuit 302 through the first connection end a and the second connection end B of the switch 301, so that the fuel gauge 303 always receives the first command signal sent by the command generating circuit 302, and the corresponding fuel gauge 303 always keeps in a start state to continuously monitor the remaining power of the battery 304.

On the contrary, when the battery 304 is not in contact with the load 310, the first connection terminal a of the switch 301 and the second connection terminal B of the switch 301 are disconnected, and at this time, the first power source terminal 307 cannot transmit the first level signal to the command generating circuit 302 through the switch 301. Correspondingly, when the command generating circuit 302 does not receive the first level signal through the signal detecting terminal D, a second command signal is generated and output to the fuel gauge 303 through the first command output terminal F. The second command signal is a signal different from the first command signal, and is a signal for instructing the electricity meter 303 to sleep or shut down. Further, when the battery 304 and the load 310 are not in contact all the time, the first connection end a of the switch 301 and the second connection end B of the switch 301 are kept in an off state all the time, and the corresponding instruction generating circuit 302 does not receive the first level signal all the time through the signal detection end D, and then generates a second instruction signal and outputs the second instruction signal to the fuel gauge 303 through the first instruction output end F, so as to control the fuel gauge 303 to keep a sleep state or an off state continuously, thereby avoiding frequent voltage and internal resistance sampling when the fuel gauge 303 is not buckled to the load 310, and reducing leakage current of the fuel gauge 303.

Specifically, in one embodiment, switch 301 comprises: the push switch, load 310, includes a terminal. When the battery 304 is terminated, the terminal gives a pressure to the push switch, so that the first connection end a and the second connection end B of the push switch are connected, and a first level signal is generated and sent to the command generating circuit 302.

When the battery 304 is not terminated, the pressing switch is not pressed by an external force, the corresponding first connection end a and the second connection end B are disconnected, and the command generating circuit 302 cannot receive the first level signal through the signal detection end D. It will be appreciated that in other embodiments, the switch 301 may be another type of switch, such as a switch that detects battery status using infrared.

With continued reference to fig. 3, the battery control circuit 300 further includes a protection circuit 305. The input end M of the protection circuit 305 is connected to the second power supply end 306, the output end (not shown) of the protection circuit 305 is connected to the power supply input end H of the electricity meter 303, the control end K of the protection circuit 305 is connected to the second instruction output end E of the instruction generating circuit 302, and the instruction generating circuit 302 is configured to generate a cut-off instruction signal and output the cut-off instruction signal to the protection circuit 305 through the second instruction output end E, so that the protection circuit 305 cuts off the power supply of the second power supply end 306 to the electricity meter 303.

Specifically, in one embodiment, the protection circuit 305 includes a field effect transistor. The input end of the field effect transistor is connected with the second power supply end 306, the output end of the field effect transistor is connected with the power supply input end H of the electricity meter 303, and the control end of the field effect transistor is connected with the second instruction output end E of the instruction generating circuit 302. In another embodiment, the protection circuit 305 may include a plurality of fets for voltage overcharge protection, voltage overdischarge protection, and charge control, respectively.

Further, in other embodiments, the protection circuit 305 further includes a protection resistor (not shown). In the present embodiment, the protection resistor is connected to the second power terminal 306 and the input terminal of the fet for increasing the anti-interference capability of the fet and preventing the fet from being damaged or damaged due to external interference, which may cause the fet to start protection in a normal state and thus damage the battery 304.

Here, when the rated voltage of the instruction generating circuit 302 is equal to the rated voltage of the fuel gauge 303, the first power source terminal 307 and the second power source terminal 306 may be the same power source terminal. Specifically, the first power source terminal 307 and the second power source terminal 306 may be ldo (low drop out regulator) chips, and are respectively configured to convert the voltage at the input terminal of the first power source terminal 307 or the input terminal of the second power source terminal 306 into a voltage conforming to the rated voltage of the corresponding device.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a control circuit of a battery according to another embodiment of the present disclosure. In the current embodiment, the instruction generating circuit is a single chip microcomputer U1, the sensing circuit is a push switch S1, the coulometer is U2, the protection circuit is connected with a DSG port of the coulometer U2, and the protection circuit comprises a plurality of field effect transistors Q1, Q2, Q3 and Q4.

When the battery (not shown) is buckled with an external load (not shown), the push switch S1 in the control circuit (not shown) is pressed to turn on the first terminal N and the second terminal Y, and outputs a first level signal to the signal detection terminal P1.0 of the single chip microcomputer U1, and the single chip microcomputer U1 determines that the battery is in a non-idle state according to the received first level signal, and further generates a first command signal and outputs the first command signal to the control terminal SCL of the fuel gauge U2 through the first command output terminal P1.6, so that the fuel gauge U2 is activated. The fuel gauge U2 may be used to monitor the remaining capacity of the battery in the activated state.

On the contrary, when the battery is not buckled to the external load, the first terminal N and the second terminal Y of the push switch S1 are kept disconnected, the signal detection terminal P1.0 of the corresponding single chip microcomputer U1 cannot receive the first level signal, and the single chip microcomputer U1 generates the second command signal and outputs the second command signal to the fuel gauge U2 through the first command output terminal P1.6, so that the fuel gauge U2 is in a sleep state or is turned off. In the embodiment illustrated in fig. 4, the first level signal is a voltage signal of 3.3V, and it is understood that the first level signal may be other types of signals in other embodiments.

When the battery enters an over-discharge state, the single chip microcomputer U1 generates a cut-off instruction signal, and the cut-off instruction signal is output to the protection circuit through the second instruction output end P1.5, so that the protection circuit cuts off the power supply of a second power supply end (not shown) to the fuel gauge U2.

After the electricity meter U2 is started, the voltage value of the battery is collected through the sampling voltage end VM and fed back to the electricity meter U2 through the VC1 port to monitor the residual electric quantity of the battery, and the residual electric quantity of the battery can be fed back to the single chip microcomputer U1 through the data lines SDA and the P1.7 end of the electricity meter U2.

In fig. 4, terminals P and P are denoted as a battery supply terminal, terminals CH + and CH-are battery charge terminals, terminals B + and B-denote a positive electrode and a negative electrode of the battery, terminal SD _ HI is a high-level terminal, an output terminal connected to a second power supply terminal (not shown in fig. 4), and terminals SRN and SRP are current input comparison terminals. Fig. 4 only illustrates a part of the structure in the technical solution provided by the present application, and a part of devices that are not related to the present application, such as a watchdog chip for preventing the command generating circuit U1 from being abnormal, or an LDO chip for supplying power to the fuel gauge U2 and the command generating circuit U1, respectively, is omitted. It is understood that in other embodiments, the control circuit of the battery may further include other components, which are not described in detail herein.

Referring to fig. 5, the present application further provides a battery. Fig. 5 is a schematic structural diagram of an embodiment of a battery according to the present application. In the present embodiment, the battery 500 includes an energy storage component 502 and a control circuit 501. Wherein, the energy storage component 502 is connected with the control circuit 501.

In the present embodiment, the energy storage component 502 is used for storing electric energy and supplying power to an external load (not shown) under the control of the control circuit 501, or charging under the control of the control circuit 501. The control circuit 501 is a control circuit of the battery as described in any one of fig. 1 to 3 and corresponding embodiments thereof.

Further, with continued reference to fig. 5, in another embodiment, the battery 500 provided by the present application further includes a power conversion circuit 503. The input end of the power conversion circuit 503 is connected to the energy storage component 502, and the output end of the power conversion circuit 503 is connected to the control circuit 501, and is configured to convert the first power signal output by the energy storage component 502 into a second power signal meeting the rated voltage requirement, and output the second power signal to the control circuit 501, so as to supply power to the control circuit 501.

The battery 500 provided by the application can be used for supplying power to intelligent terminals such as mobile phones, interphones or computers and the like. When the state detection circuit in the control circuit 501 in the battery 500 is a push switch, the push switch is provided on the side where the battery 500 contacts the terminal, so that when the battery 500 is snapped onto the terminal, pressure from the terminal may cause the switch to close. The switch is closed to generate a corresponding first level signal and send the first level signal to the instruction generating circuit, and the instruction generating circuit receives the first level signal and generates a first instruction signal for indicating the activation of the fuel gauge according to the first level signal.

On the other hand, if the battery 500 is in the transportation process, the battery 500 is not buckled to the terminal, and the switch is not pressed by the terminal, the switch is kept in the off state. Correspondingly, the command generating circuit in the control circuit 501 does not receive the first level signal, so that a second command signal is generated and sent to the fuel gauge, so as to enable the fuel gauge to sleep or shut down for reducing the leakage current, which may be referred to as the corresponding parts in fig. 1 to fig. 4 above.

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 (10)

1. A control circuit for a battery, the control circuit comprising: a state detection circuit, a command generation circuit and a fuel gauge;

the state detection circuit is connected with the instruction generation circuit and is used for detecting the state of the battery and generating a corresponding state signal to be sent to the instruction generation circuit, wherein the state of the battery comprises an idle state and a non-idle state;

the instruction generating circuit is connected with the fuel gauge and used for generating an instruction signal matched with the state signal and sending the instruction signal to the fuel gauge, wherein when the state signal indicates that the battery is in the non-idle state, a first instruction signal for indicating the fuel gauge to start is generated, and when the state signal indicates that the battery is in the idle state, a second instruction signal for indicating the fuel gauge to sleep or shut down is generated;

the fuel gauge is used for monitoring the residual capacity of the battery after starting.

2. The battery control circuit of claim 1, wherein the state detection circuit is a sensing circuit for sensing whether the battery is in contact with a load, wherein the battery is in the non-idle state when the battery is in contact with the load, and the battery is in the idle state when the battery is not in contact with the load.

3. The battery control circuit according to claim 2, wherein the sensing circuit comprises a switch, a first connection terminal of the switch is connected to a first power source terminal, and a second connection terminal of the switch is connected to the signal detection terminal of the command generating circuit; a first instruction output end of the instruction generating circuit is connected with an instruction input end of the fuel gauge;

when the battery is in contact with the load, the first connecting end and the second connecting end are connected, the command generating circuit receives a first level signal through the signal detection end, responds to the received first level signal to generate the first command signal, and outputs the first command signal to the fuel gauge through the first command output end;

when the battery is not in contact with the load, the first connecting end and the second connecting end are disconnected, and the instruction generating circuit generates the second instruction signal and outputs the second instruction signal to the fuel gauge through the first instruction output end if the first level signal cannot be received through the signal detection end.

4. The control circuit of claim 3, wherein the switch is a push switch, and when the switch is pressed by an external force, the first connection terminal and the second connection terminal are connected; when the push switch is not pressed by external force, the first connecting end and the second connecting end are disconnected.

5. The battery control circuit according to claim 3, further comprising a protection circuit, wherein an input terminal of the protection circuit is connected to a second power supply terminal, an output terminal of the protection circuit is connected to a power supply input terminal of the fuel gauge, a control terminal of the protection circuit is connected to a second command output terminal of the command generation circuit, and the command generation circuit is configured to generate a shutdown command signal and output the shutdown command signal to the protection circuit through the second command output terminal, so that the protection circuit shuts off power supply of the fuel gauge from the second power supply terminal.

6. The battery control circuit according to claim 5, wherein the first power supply terminal and the second power supply terminal are the same power supply terminal.

7. The battery control circuit of claim 5, wherein the protection circuit comprises a fet, an input terminal of the fet is connected to the second power supply terminal, an output terminal of the fet is connected to the power supply input terminal of the electricity meter, and a control terminal of the fet is connected to the second command output terminal of the command generation circuit.

8. The battery control circuit of claim 7, wherein the protection circuit further comprises a protection resistor, and the protection resistor is connected between the second power supply terminal and the input terminal of the fet.

9. The battery is characterized by comprising an energy storage assembly and a control circuit, wherein the energy storage assembly is connected with the control circuit;

the energy storage assembly is used for storing electric energy and supplying power to an external load under the control of the control circuit;

the control circuit is a control circuit for a battery according to any one of claims 1 to 8.

10. The battery of claim 9, further comprising a power conversion circuit, wherein an input terminal of the power conversion circuit is connected to the energy storage assembly, and an output terminal of the power conversion circuit is connected to the control circuit, and is configured to convert a first power signal output by the energy storage assembly into a second power signal meeting a rated voltage requirement, and output the second power signal to the control circuit to supply power to the control circuit.

Images