CN116191615A - Battery identification circuit, battery protection system and electric equipment - Google Patents

Abstract

The invention belongs to the field of battery charging protection, and particularly relates to a battery identification circuit, a battery protection system and electric equipment, which comprises the following components: the discharging module is connected with the target battery and used for discharging the target battery; the first end of the control module is connected with the first end of the discharging module and the first end of the target battery, and the second end of the control module is connected with the second end of the target battery; the control module is used for controlling the discharging module through the first end so that the target battery discharges the discharging module, receiving a voltage signal of the target battery through the second end, and judging the battery type of the target battery according to the change rate of the voltage signal.

Description

Battery identification circuit, battery protection system and electric equipment

Technical Field

The invention belongs to the field of battery charging protection, and particularly relates to a battery identification circuit, a battery protection system and electric equipment.

Background

With the development of science and technology, people have increasingly high requirements on energy storage and electricity utilization devices. In order to meet travel demands, portable energy storage power supplies are appeared on the market. The energy storage power supply is a high-capacity mobile power supply and is mainly used for emergency treatment and meeting outdoor power requirements. The energy storage power supply outputs alternating current 220V voltage to provide electric energy, when the household power fails suddenly, the energy storage power supply can meet the requirement of power consumption of low-power electrical appliances, and when the household power supply is used for camping outdoors, the energy storage power supply can be used for charging a power consumption device. The energy storage power supply also has all functions of an online UPS, provides stable power protection for key loads, provides stable power supply in emergency situations, and is widely applied to disaster relief and rescue.

When the electric quantity of the energy storage power supply is exhausted, the energy storage power supply can be charged by using a solar battery or an automobile storage battery, but because the automobile battery is generally internally provided with a fuse, the output current cannot be too large, the solar battery has no limitation, if the energy storage power supply cannot distinguish the energy storage power supply from the automobile battery, the fuse of the automobile battery is burnt out by adopting maximum current charging, the automobile is damaged, the energy storage power supply is charged by adopting minimum current charging, the charging efficiency is low, and the battery capacity cannot be fully utilized. The traditional battery identification mode is used for identifying according to different voltage ranges of different types of batteries, the voltage ranges of the solar battery and the automobile storage battery are relatively close, and the difference of two power utilization devices cannot be accurately identified through simple voltage identification, so that the two power utilization devices are distinguished.

Disclosure of Invention

The embodiment of the invention provides a battery identification circuit, which aims to solve the problem that two batteries with similar voltage ranges cannot be accurately identified in a traditional battery identification mode.

The embodiment of the invention is realized in such a way that a battery identification circuit comprises:

the discharging module is connected with the target battery and used for discharging the target battery;

the first end of the control module is connected with the first end of the discharging module and the first end of the target battery, and the second end of the control module is connected with the second end of the target battery;

the control module is used for controlling the discharging module through the first end to enable the target battery to discharge the discharging module, receiving a voltage signal of the target battery through the second end, and judging the battery type of the target battery according to the change rate of the voltage signal.

Further, the discharging module comprises a load unit and a control switch, the load unit is connected with the target battery in parallel, and the control switch is arranged on a connecting path between the target battery and the load unit and is driven to be opened or closed by the control module.

Still further, the identification circuit further includes a voltage division module disposed between the target battery and the control module.

Still further, the device also comprises a detection module and a connection module;

the input end of the detection module is connected with the anode of the target battery through a connection module, and the output end of the detection module is connected with the third end of the control module;

the connecting module comprises an anode conductor, a cathode conductor and a signal conductor, one end of the signal conductor is connected with the detecting module, and the other end of the signal conductor is connected with the anode conductor and the anode of the battery.

Still further, the detection module includes level detection unit, level detection unit one end with connecting module links to each other, one end with control module links to each other, level detection unit is according to the battery different to the control module transmission different level signals of access, the main control unit is according to different level signals to charge the power consumption device control.

Still further, the detection module includes voltage detection unit, voltage detection unit one end with connecting module links to each other, one end with control module links to each other, voltage detection unit is according to the battery different that inserts to control module send different voltage signal, the main control unit is according to different voltage signal to charge the power consumption device control.

The embodiment of the invention also provides a battery protection system, which is characterized by comprising an electric device and the battery identification circuit;

the power utilization device is connected with the fourth end of the control module, and the control module is used for determining current parameters of the power utilization device according to the battery type after identifying the target battery type.

Still further, the protection system further includes a bleed module connected in parallel with the target battery.

The embodiment of the invention also provides electric equipment, which comprises the battery protection system.

Further, the electric equipment is an energy storage power supply.

The invention has the beneficial effects that the discharging module and the control module are arranged, the control module controls the discharging module to be communicated with the target battery, so that the target battery discharges the discharging module, the voltage of the target battery changes in the process of discharging the target battery when the discharging module is required to discharge, meanwhile, the control module collects the voltage of the target battery end, and the battery type is identified according to the change rate of the voltage of the target battery during the period of communicating the discharging module with the target battery.

Drawings

FIG. 1 is a functional block diagram of a battery identification circuit provided by the present invention;

fig. 2 is a circuit diagram of a battery identification circuit provided by the invention;

FIG. 3 is a functional block diagram of a battery identification circuit with a detection module according to the present invention;

FIG. 4 is a circuit diagram of a functional block diagram of a battery identification circuit with a detection module according to the present invention;

description of main reference numerals:

the device comprises a target battery 10, a discharging module 20, a load unit 201, a control switch 202, a control module 30, a voltage dividing module 40, a connecting module 50, a detecting module 60 and a discharging module 70.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features.

According to the invention, the discharging module and the control module are arranged, the discharging module is controlled by the control module to discharge the target battery to the discharging module, and as the voltage of the solar battery fluctuates along with the fluctuation of load current in real time, when the voltage of the storage battery is in a certain range of load, the current changes and the voltage fluctuation is not very large, the discharging module is connected into the target battery as the load to discharge the target battery, the control module monitors the voltage of the battery end, and the battery type is identified according to the change rate of the voltage of the target battery during the communication period of the discharging module and the target battery.

Example 1

Referring to fig. 1, an embodiment of the present invention provides a battery identification circuit, which is characterized by comprising: a discharging module 20 and a control module 30, the discharging module 20 being connected with the target battery 10 for discharging to the target battery 10; the control module 30, the first end of the control module 30 is connected with the first end of the discharging module 20 and the first end of the target battery 10, and the second end of the control module 30 is connected with the second end of the target battery 10; the control module 30 is configured to control the discharging module 20 through a first end so that the target battery 10 discharges the discharging module 20, and to receive a voltage signal of the target battery 10 through a second end, and to determine a battery type of the target battery 10 according to a voltage change rate.

Because the voltage of the solar battery can fluctuate in real time along with the fluctuation of the load current, when the voltage of the storage battery is connected with a certain range of load, the current changes and the voltage fluctuation is not very large, namely the voltage does not fluctuate along with the fluctuation of the load current. The voltage change rate refers to the fluctuation change of the battery voltage, and the corresponding voltage fluctuation change is large when the solar battery is connected, the voltage change rate is large, the fluctuation change of the battery voltage is small, and the voltage change rate is small.

The discharging module 20 may be a resistor, a battery, an external circuit or other components that can be used as a load; the control module 30 may be a single chip microcomputer or other control circuit. The functions of the discharging module 20 and the control module 30 can be implemented in various ways, and the implementation can be implemented by conventional technical means without the need of creative efforts, for those skilled in the art.

The target battery 10 may be a solar battery, an automobile battery or other batteries, and the solar battery and the batteries have different power supply performance requirements, so that the solar battery and the battery type need to be judged.

According to the invention, by arranging the discharging module 20 and the control module 30, the discharging module 20 is controlled by the control module 30 so that the target battery 10 discharges the discharging module 20, the voltage of the target battery 10 is changed by the discharging module 20, the control module 30 collects the voltage of the target battery 10, and the battery type is identified according to the change rate of the voltage of the target battery 10 during the period that the discharging module 20 is used as a load to be communicated with the target battery 10.

In this embodiment, the discharging module 20 is connected in parallel with the target battery 10, the second end of the discharging module 20 is connected to the first end of the target battery 10, and the third end of the discharging module 20 is connected to the second end of the target battery 10 to form a loop with the target battery 10; the first end of the control module 30 is connected with the first end of the discharging module 20 and the first end of the target battery 10, the second end of the control module 30 is connected with the second end of the target battery 10, the control module 30 is connected with the target battery 10 in parallel to monitor the voltage of the target battery 10, and meanwhile, the control module 30 sends out a control signal to control whether the discharging module 20 is communicated with the target battery 10 or not. While the discharge module 20 communicates with the target battery 10, as a load, the target battery 10 changes in voltage during the discharge of the target battery 10, and the voltage change rates of different types of batteries are different. The voltage of the solar battery fluctuates along with the change of the load current, and the voltage change rate is high; the voltage of the storage battery does not fluctuate along with the change of the load current, the voltage change rate is small, and the type of the battery is judged according to the voltage change rate.

Specifically, the battery has a rated voltage range, because the solar battery fluctuates along with the change of load current, when the load is suddenly connected, the voltage of the battery is instantaneously reduced and exceeds the rated voltage range, namely the solar battery, and the voltage reduction range is smaller, and the voltage value of the battery is within the rated voltage range, namely the storage battery.

In this embodiment, the signals sent by the control module 30 to the discharge module 20 include an on signal and an off signal.

Specifically, after the target battery 10 is connected, the control module 30 sends a turn-on signal to the discharge module 20 to control the discharge module 20 to turn on, the discharge module 20 is connected with the target battery 10, the target battery 10 discharges to the discharge module 20, the voltage of the target battery 10 changes, the control module 30 collects the voltage of the target battery 10, the battery type is identified according to the change rate of the voltage of the target battery 10 during the connection period of the discharge module 20, the control module 30 sends a turn-off signal to the discharge module 20 after the identification is completed to control the discharge module 20 to turn off, and the discharge module 20 is disconnected from the target battery 10.

Example two

On the basis of the first embodiment, the discharging module 20 includes a load unit 201 and a control switch 202, the load unit 201 is connected in parallel with the target battery 10, and the control switch 202 is provided on a connection path of the target battery 10 and the load unit 201 and is driven to be opened or closed by the control module 30.

In this embodiment, one end of the load unit 201 is connected to the positive electrode of the target battery 10, the other end is connected to the second end of the control switch 202, the third end of the control switch 202 is connected to the negative electrode of the target battery 10, the load unit 201 and the target battery 10 form a loop, the control switch 202 is closed and is connected, and the control switch 202 is opened and disconnected. The first end of the control switch 202 is connected with the first end of the control module 30, receives a control signal sent by the module, is driven to be closed or opened by the control signal, and the first end of the control module 30 is also connected with the cathode of the target battery 10. The second end of the control module 30 is connected with the anode of the target battery 10, receives the voltage signal of the target battery 10, collects the voltage of the target battery 10 during the communication period of the load unit 201, presets a rated voltage range in the control module 30, compares the collected voltage with the preset rated voltage range, and judges the battery type according to the difference of the variation amplitude of the collected voltage compared with the rated voltage range.

When the control module 30 works, the control switch 202 is controlled to be conducted by sending a control signal, the loop between the load unit 201 and the target battery 10 is communicated, the target battery 10 discharges to the load unit 201, the voltage of the target battery 10 changes, the control module 30 collects the voltage change of the target battery 10, the battery type of the target battery 10 is identified according to the change rate of the voltage of the target battery 10 during the connection period of the load unit 201, the control module 30 sends an off signal to the control switch 202 after the identification is finished, the control switch 202 is turned off, the loop between the discharge battery and the target battery 10 is turned off, and the target battery 10 stops discharging to the load unit 201.

Referring to fig. 2, in particular, the discharge unit may employ a resistor, denoted as load resistor R1; the control switch 202 may employ a triode. .

One end of the load resistor R1 is connected with the anode of the target battery 10, and the other end is connected with the triode; the base electrode of the triode is connected with the first end of the control module 30 through a resistor R2, the collector electrode is connected with a load resistor R1, and the emitter electrode is grounded; the anode of the target battery 10 is connected with the second end of the control module 30, and the cathode of the target battery 10 is grounded.

During operation, the control module controls the triode to be opened through the resistor R2, the target battery discharges through the load resistor R1, the voltage signal is converted by the voltage dividing module 40 and then transmitted to the inside of the control module, and the control module judges the type of the target battery by comparing the voltage change rate.

Example III

On the basis of the first embodiment, the identification circuit further includes a voltage division module 40, and the voltage division module 40 is disposed between the target battery 10 and the control module 30.

In this embodiment, the voltage dividing module 40 is used to share the voltage to avoid burning out the control module 30.

Specifically, the voltage dividing module 40 may adopt two resistors, namely a resistor R3 and a resistor R4, where the resistor R3 is connected in series with the resistor R4, and in the circuit connection, the resistor R3 and the resistor R4 share the voltage emitted by the target battery 10; meanwhile, the resistor R4 is connected with the control module 30 in parallel, and the parallel circuit voltage is equal in circuit connection, namely the voltage born by the control module 30 is equal to the voltage born by the resistor R4. A part of the voltage emitted by the target battery 10 is divided by the resistor R3, the voltage born by the resistor R4 is limited, and the voltage born by the resistor R4 is equal to the voltage born by the control module 30, so that the voltage born by the control module 30 is reduced, the control module 30 is prevented from being burnt out due to overhigh voltage, and the stability of a circuit is ensured.

Example IV

Referring to fig. 3, on the basis of the first embodiment, the battery identification circuit further includes a detection module 60 and a connection module 50;

the input end of the detection module 60 is connected with the anode of the target battery 10 through the connection module 50, and the output end of the detection module 60 is connected with the third end of the control module 30; the connection module 50 includes a positive conductor, a negative conductor, and a signal conductor, one end of which is connected to the detection module 60, and the other end of which is connected to the positive conductor and to the positive electrode of the battery.

The connection module 50 is provided with a signal conductor, the signal conductor is connected with the positive electrode conductor, the signal conductor senses the positive electrode voltage of the target battery 10, the signal conductor transmits the sensed positive electrode voltage to the detection module 60, the detection module 60 sends an identification signal to the control module 30 according to the received positive electrode voltage, and the identification module judges the battery type according to the identification signal sent by the control module 30.

In this embodiment, the connection module 50 and the detection module 60 are only used when a particular battery type is identified. The connection module 50 can only be connected with a specific type of battery, when the connection module 50 is connected with the specific type of battery, a signal conductor arranged in the connection module 50 is connected with an anode conductor, the signal conductor senses the anode voltage of the battery, the signal conductor transmits the sensed anode voltage to the detection module 60, the detection module 60 sends an identification signal to the control module 30 according to the received anode voltage, and the identification module judges the type of battery according to the identification signal sent by the control module 30. If the specific type of battery is not available, the connection module 50 cannot match the specific type of battery, and a one-implementation mode is adopted for judging.

In this embodiment, the specific battery type may be a solar battery. When the target battery 10 is a solar battery, the detection module 60 is connected with the solar battery through the connection module 50, the signal conductor senses the positive voltage of the battery, the signal conductor transmits the sensed positive voltage to the detection module 60, the detection module 60 sends an identification signal to the control module 30 according to the received positive voltage, and the identification module judges that the battery is the solar battery according to the identification signal sent by the control module 30. When the target battery 10 is a battery of another type than the solar battery, the connection module 50 cannot be connected to the target battery 10, and the detection module 60 cannot transmit an identification signal to the control module 30 to identify the battery type.

In this embodiment, the connection module 50 and the detection module 60 are added, the control module 30 determines the battery type of the target battery 10 according to the signal fed back by the detection module 60, the control module 30 does not need to collect the voltage of the target battery 10, and then compares the voltage with the rated voltage range, so that the battery type can be determined directly according to the determination signal sent by the detection module 60, and the speed is faster. When the control module 30 cannot directly determine the battery type through the signal fed back by the detection module 60, the discharge module 20 is controlled to communicate with the target battery 10, so that the target battery 10 discharges to the discharge module 20, and then the battery type is determined according to the collected voltage of the target battery 10.

In this embodiment, the detection module 60 may be a level signal detection module 60, or may be a voltage signal detection module 60, and level detection or voltage detection may be implemented by a person skilled in the art without performing any inventive work.

Example five

Referring to fig. 4, on the basis of the fourth embodiment, the detection module 60 includes a level detection unit having one end connected to the connection module 50 and one end connected to the control module 30.

In this embodiment, the input end of the level detection unit is connected to the signal conductor of the connection module 50, and the output end of the level detection unit is connected to the control module 30. The signal conductor is connected with the positive electrode conductor, the signal conductor senses positive electrode high voltage, the level detection unit receives positive electrode high voltage sensed by the signal conductor and sends a high level signal to the control module 30 according to the voltage, and the control module 30 receives the high level signal sent by the level detection unit and judges the battery type according to the received high level signal.

Specifically, the level detection unit may be a triode, where the base of the triode is connected to the signal conductor through a resistor, the collector is connected to the main control unit and is connected to the power supply VCC through a resistor, and the emitter is grounded.

When the voltage signal generator works, the signal conductor transmits an induced voltage signal to the base electrode of the triode, if the voltage signal received by the triode is a high voltage signal, the triode is turned on, the collector electrode is conducted with the emitter electrode, and the collector electrode outputs a low level; if the voltage signal received by the base electrode of the triode is a low voltage signal, the triode is turned off, the collector electrode and the emitter electrode are not conducted, and the collector electrode is connected to VCC through a pull-up resistor, so that a high level is output.

When the connected battery is a solar battery, the signal conductor in the connection module 50 is connected with the positive electrode conductor, the signal conductor senses the positive electrode high voltage of the battery and transmits the high voltage to the triode, the triode outputs a low-level signal according to the received high voltage, and the main control unit receives the low-level signal output by the triode and judges that the connected battery is the solar battery.

Example six

On the basis of the fourth embodiment, the detection module 60 includes a voltage detection unit, one end of which is connected to the connection module 50 and one end of which is connected to the control module 30.

Specifically, in this embodiment, the input terminal of the voltage detecting unit is connected to the signal conductor, and the voltage detecting unit converts the voltage signal at the signal conductor terminal into a signal recognizable by the control module 30.

Specifically, the voltage detection module 60 may employ two resistors connected in series, and in the circuit connection, the two resistors share the voltage emitted by the target battery 10; meanwhile, one of the resistors is connected in parallel with the main control unit, and the parallel circuit voltage is equal in circuit connection, namely the voltage born by the main control unit is equal to the voltage born by the resistor. The voltage of the target battery 10 is shared by two resistors, so that the voltage born by the main control unit is also reduced. The main control unit can identify the voltage signal, and meanwhile burning out of the main control unit due to overhigh voltage is avoided.

Example seven

The embodiment of the invention also provides a battery protection system, which comprises an electric device and the battery identification circuit; the power consumption device is connected to the fourth terminal of the control module 30, and the control module 30 is configured to determine a current parameter of the power consumption device according to the battery type after identifying the type of the target battery 10.

In this embodiment, the control module 30 determines the battery type according to the received identification signal or the collected battery voltage, and sends different energizing signals to the electric device according to the determination result, so as to control the energizing current parameter of the electric device, so that the current magnitude when the electric device draws electric quantity from the target battery 10 is matched with the current magnitude that can be born when the target battery 10 is powered.

Example eight

Referring to fig. 2, on the basis of the seventh embodiment, the protection system further includes a bleed module 70, and the bleed module 70 is connected in parallel with the target battery 10.

In this embodiment, the bleed module 70 quickly bleeds energy when the battery is unplugged, ensuring that the control module 30 can quickly identify after the interface is unplugged.

Specifically, the bleed module 70 may include a capacitor that is connected in parallel with the target battery 10.

After the battery is pulled out, the control module 30 briefly controls the discharge module 20 to be conducted, so that residual voltage on the terminal capacitance of the battery is converted into heat form to be dissipated through the discharge module 20, the port voltage is reduced, the control module 30 recognizes that the port voltage is reduced through the voltage acquisition module, and accordingly the battery is judged to be pulled out.

Example nine

The embodiment of the invention also provides electric equipment, which comprises the battery protection system.

Examples ten

On the basis of the ninth embodiment, the electric equipment is an energy storage power supply.

In this embodiment, by setting the identification module and the control module 30, after the battery is connected, the load unit 201 in the identification module starts to discharge the battery, the electric quantity discharged by the load unit 201 changes the voltage of the battery end, the voltage change is detected by the voltage detection unit and sent to the control module 30, the control module 30 identifies the battery type according to the voltage change rate of the battery end during the discharging period of the discharge module 20, and controls the energizing current of the energy storage power supply so as to adapt to the bearable current of the connected target battery 10, and avoid burning the battery due to overlarge current.

It is understood that those skilled in the art can combine the various embodiments of the above embodiments to obtain technical solutions of the various embodiments under the teachings of the above embodiments.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (10)

1. A battery identification circuit, comprising:

the discharging module is connected with the target battery and used for discharging the target battery;

the first end of the control module is connected with the first end of the discharging module and the first end of the target battery, and the second end of the control module is connected with the second end of the target battery;

the control module is used for controlling the discharging module through the first end to enable the target battery to discharge the discharging module, collecting voltage signals of the target battery through the second end, and judging the battery type of the target battery according to the change rate of the voltage signals.

2. The battery identification circuit of claim 1, wherein the discharging module comprises a load unit and a control switch, the load unit is connected in parallel with the target battery, and the control switch is arranged on a connection path between the target battery and the load unit and is driven to be opened or closed by the control module.

3. The battery identification circuit of claim 1, further comprising a voltage divider module disposed between the target battery and the control module.

4. A battery identification circuit as claimed in any one of claims 1 to 3, further comprising a detection module and a connection module;

the input end of the detection module is connected with the anode of the target battery through a connection module, and the output end of the detection module is connected with the third end of the control module;

the connecting module comprises an anode conductor, a cathode conductor and a signal conductor, one end of the signal conductor is connected with the detecting module, and the other end of the signal conductor is connected with the anode conductor and the anode of the battery;

the control module is used for judging the type of the target battery according to the signal fed back by the detection module, and if the type of the target battery cannot be judged according to the signal fed back by the detection module, the control module controls the discharge module to discharge the target battery through the first end, collects the voltage change rate of the target battery during the discharge period of the discharge module through the second end, and judges the type of the target battery according to the voltage change rate.

5. The battery identification circuit of claim 4 wherein the detection module comprises a level detection unit having one end connected to the connection module and one end connected to the control module.

6. The battery identification circuit of claim 4 wherein the detection module comprises a voltage detection unit having one end connected to the connection module and one end connected to the control module.

7. A battery protection system comprising an electrical device and the battery identification circuit of claim 1;

the power utilization device is connected with the fourth end of the control module, and the control module is used for determining current parameters of the power utilization device according to the battery type after identifying the target battery type.

8. The battery protection system of claim 7, further comprising a bleed module connected in parallel with the target battery.

9. A powered device comprising the battery protection system of claim 8.

10. The powered device of claim 9, wherein the powered device is an energy storage power source.

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