CN217508311U - Discharge protection circuit and battery pack - Google Patents
Discharge protection circuit and battery pack Download PDFInfo
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- CN217508311U CN217508311U CN202220665603.3U CN202220665603U CN217508311U CN 217508311 U CN217508311 U CN 217508311U CN 202220665603 U CN202220665603 U CN 202220665603U CN 217508311 U CN217508311 U CN 217508311U
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Abstract
The present disclosure relates to a discharge protection circuit and a battery pack. The discharge protection circuit includes: the first end of the first switch component is connected with the battery, the second end of the first switch component is connected with a load circuit, and the first energy storage component is connected with the first switch component so that the battery and the first energy storage component jointly supply power to the load circuit when the first switch component is conducted; and the second energy storage assembly is connected with the load circuit so as to supply power to the load circuit by the second energy storage assembly when the first switch assembly is switched off, and is also connected with the battery by the first switch assembly so as to charge the second energy storage assembly by the battery when the first switch assembly is switched on. By adopting the circuit, the discharge capacity of the battery can be greatly improved without influencing the use of the whole machine.
Description
Technical Field
The present disclosure relates to the field of battery discharge technologies, and in particular, to a discharge protection circuit and a battery pack.
Background
The negative electrode material of lithium ion batteries used in consumer electronics is usually graphite, and lithium ion batteries using silica negative electrode materials are also gradually used at present, because the capacity of silica negative electrode lithium ion batteries is larger under the same battery volume. However, the capacity of the silicon-oxygen cathode battery is more concentrated in the low-voltage region of the battery, for example, the capacity of the conventional graphite cathode battery is 30% in the region of 3.6V to 0V under the same capacity, and the capacity of the silicon-oxygen cathode battery is 40%.
During discharging, the discharge cut-off voltage of the graphite cathode battery is usually 3.0V, while the discharge cut-off voltage of the silicon-oxygen cathode battery can reach 2.75V, but the battery voltage cannot be used to 2.75V when the whole machine is used, and because the hardware circuit of the whole machine cannot work when the voltage is too low, the shutdown voltage of the whole machine is usually about 3.3V.
For the product of the battery applying the silicon-oxygen cathode, the whole machine cannot fully use the whole capacity of the battery, and larger capacity loss exists, so that the endurance is influenced.
SUMMERY OF THE UTILITY MODEL
To overcome the problems in the related art, the present disclosure provides a discharge protection circuit and a battery pack.
According to a first aspect of embodiments of the present disclosure, there is provided a discharge protection circuit, the circuit including:
the first end of the first switch component is connected with the battery, the second end of the first switch component is connected with a load circuit, and the first switch component is also connected with a first energy storage component, so that the battery and the first energy storage component jointly supply power to the load circuit when the first switch component is conducted;
and the second energy storage assembly is connected with the load circuit so as to supply power to the load circuit by the second energy storage assembly when the first switch assembly is switched off, and is also connected with the battery by the first switch assembly so as to charge the second energy storage assembly by the battery when the first switch assembly is switched on.
In some embodiments, the circuit further comprises:
the first end of the second switch component is connected with the battery, the second end of the second switch component is grounded, and the second switch component is also connected with the first energy storage component, so that the battery charges the first energy storage component when the second switch component is switched on.
In some embodiments, the circuit further comprises:
the fuel gauge chip is provided with a first pulse signal output end and a second pulse signal output end;
the first pulse signal output end is connected with the control end of the first switch component, the second pulse signal output end is connected with the control end of the second switch component, and the first pulse signal and the second pulse signal are set to enable the first switch component and the second switch component not to be conducted simultaneously.
In some embodiments, the circuit further comprises:
a third switch assembly, a first end of the third switch assembly being connected to the battery, a second end of the third switch assembly being connected to the load circuit.
In some embodiments, the circuit further comprises:
and the host input/output port is connected with the control end of the third switch component and the control end of the first switch component, so that when the electricity meter chip detects that the battery voltage is greater than a set threshold value, the host input/output port outputs a conduction control signal to control the third switch component to be conducted, and when the electricity meter chip detects that the battery voltage is less than or equal to the set threshold value, the host input/output port outputs the conduction control signal to allow the first switch component to be conducted.
In some embodiments, the host input/output port is connected to the control terminal of the third switching element through an inverter, the host input/output port and the first pulse signal are respectively connected to two input terminals of an and gate, and an output terminal of the and gate is connected to the control terminal of the first switching element, so that when the first switching element is allowed to be turned on by outputting the turn-on control signal through the host input/output port, the turn-on of the first switching element is controlled by the first pulse signal.
In some embodiments, the duty cycle of the first pulse signal and the second pulse signal output by the fuel gauge chip are both less than 0.5.
In some embodiments, the first switching component comprises a first transistor and a second transistor, a first terminal of the first transistor is connected with the battery, and a second terminal of the first transistor is connected with a first terminal of the second transistor through the first energy storage component;
the first end of the second energy storage component is connected with the second end of the second transistor and is connected with the load circuit.
In some embodiments, the second switch component includes a third transistor and a fourth transistor, a first end of the third transistor is connected to the battery, a second end of the third transistor is connected to the first end of the third transistor through the first energy storage component, and a second end of the third transistor is grounded.
In some embodiments, the first energy storage assembly comprises a capacitor and a voltage regulator tube connected in parallel, and the voltage regulator tube has a voltage regulation value equal to a set voltage value;
the second energy storage component comprises a capacitor.
According to a second aspect of embodiments of the present disclosure, there is provided a battery assembly including:
a battery;
the discharge protection circuit according to the first aspect described above, connected to the battery.
By adopting the discharge protection circuit disclosed by the invention, the following beneficial effects can be realized: when the first switch component is conducted, the battery and the first energy storage component form a series circuit to jointly supply power to the load circuit. Thus, when the battery voltage is low, the voltage supplied to the load circuit is not so low, thereby ensuring that the capacity of the battery is fully utilized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram illustrating a discharge protection circuit according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating a discharge protection circuit according to an exemplary embodiment;
FIG. 3 is a schematic diagram illustrating a discharge protection circuit according to an exemplary embodiment;
FIG. 4 is a waveform diagram illustrating a first pulse signal and a second pulse signal in accordance with an exemplary embodiment;
FIG. 5 is a circuit diagram illustrating a discharge protection circuit in accordance with an exemplary embodiment;
FIG. 6 is a schematic diagram illustrating the dischargeable capacity of a conventional cell phone battery and the comparison of the dischargeable capacity of the battery in the discharge protection circuit employing the present disclosure with the dischargeable capacity of the battery in the conventional battery discharge circuit in accordance with an exemplary embodiment;
FIG. 7 is a schematic diagram illustrating the construction of a battery assembly according to an exemplary embodiment;
FIG. 8 is a block diagram illustrating an apparatus in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a schematic diagram illustrating a structure of a discharge protection circuit according to an exemplary embodiment. As shown in fig. 1, the discharge protection circuit is connected to a battery 200, and the discharge protection circuit 100 includes:
a first switch assembly 101, a first end of the first switch assembly 101 is connected with the battery 200, a second end of the first switch assembly 101 is connected with a load circuit 300,
a first energy storage component 102 connected to the first switching component 101, so that when the first switching component 101 is turned on, the battery 200 and the first energy storage component 102 jointly supply power to the load circuit 300;
the second energy storage assembly 103 is connected with the load circuit 300, so that when the first switch assembly 101 is turned off, the second energy storage assembly 103 supplies power to the load circuit 300, and the second energy storage assembly 103 is further connected with the battery 200 through the first switch assembly 101, so that when the first switch assembly 101 is turned on, the battery 200 charges the second energy storage assembly 103.
The discharge protection circuit in the embodiment of the present disclosure is connected between the battery and the load circuit. When the first switch component is conducted, the battery and the first energy storage component form a series circuit to jointly supply power to the load circuit. The first energy storage assembly is used for supplementing the battery voltage when the battery voltage is lower. Thus, when the battery voltage is low, the voltage supplied to the load circuit is not so low as to ensure that the capacity of the battery is fully utilized.
The first switch assembly may include at least one transistor, and the first switch assembly is connected in series with the first energy storage assembly, so that the battery and the first energy storage assembly form a series circuit when the first switch assembly is turned on. Illustratively, the first switching component includes two transistors, and the first energy storage component is connected between the two transistors.
With the circuit in the above embodiment, power can be supplied to the load circuit regardless of whether the first switching element is turned on or off.
In some embodiments, as shown in fig. 2, the circuit further comprises:
a second switch assembly 104, a first end of the second switch assembly 104 is connected to the battery 200, a second end of the second switch assembly 104 is grounded, and the second switch assembly 104 is further connected to the first energy storage assembly 102, so that the battery 200 charges the first energy storage assembly 102 when the second switch assembly 104 is turned on.
The second switch assembly may include an indication transistor, and the second switch assembly is connected in series with the first energy storage assembly such that the first energy storage assembly is charged by the battery when the second switch assembly is turned on. Illustratively, the second switching component includes two transistors, and the first energy storage component is connected between the two transistors.
By adopting the circuit in the embodiment, the first energy storage assembly can be charged, so that the load circuit can be stably powered when the first switch assembly is switched on.
In some embodiments, the circuit further comprises:
the fuel gauge chip is provided with a first pulse signal output end and a second pulse signal output end;
wherein the first pulse signal output terminal is connected to the control terminal of the first switch module, the second pulse signal output terminal is connected to the control terminal of the second switch module, and the first pulse signal and the second pulse signal are set such that the first switch module and the second switch module are not turned on simultaneously.
In this embodiment, the fuel gauge chip is provided with two pulse output terminals for controlling the on and off of the first switch component and the second switch component, respectively. The phase of the pulses output by the two pulse output ends is different by 180 degrees, so that the first switch component and the second switch component are not conducted at the same time. If the first switch assembly and the second switch assembly are conducted at the same time, the battery is directly grounded through the first switch assembly and the second switch assembly, and the battery is short-circuited.
In some embodiments, as shown in fig. 3, the circuit further comprises:
a third switching component 105, a first end of the third switching component 105 being connected to the battery, and a second end of the third switching component being connected to the load circuit.
In this embodiment, the third switching component is connected between the battery and the load circuit, so that when the third switching component is turned on, power is directly supplied to the load circuit by the battery. The third switching component may include at least one transistor.
In some embodiments, the circuit further comprises:
and the host input/output port is connected with the control end of the third switch component and the control end of the first switch component, so that when the electricity meter chip detects that the battery voltage is greater than a set threshold value, the host input/output port outputs a conduction control signal to control the third switch component to be conducted, and when the electricity meter chip detects that the battery voltage is less than or equal to the set threshold value, the host input/output port outputs the conduction control signal to allow the first switch component to be conducted.
In this embodiment, the host obtains the battery power through the fuel gauge chip, and outputs the on-state control signal through the input/output port to control the on-state of the first switch component and the third switch component. On one hand, when the electricity meter chip detects that the battery voltage is higher, the host machine judges that the battery voltage does not need to be supplemented at the moment after the electricity meter chip acquires the battery voltage information, outputs a conduction control signal through the input/output port to control the conduction of the third switch component, and the battery directly supplies power to the load circuit. On the other hand, when the electricity meter chip detects that the battery voltage is low, the host machine judges that the battery voltage needs to be supplemented at the moment after the information of the battery voltage is acquired through the electricity meter chip, the first switch component is controlled to be conducted through the input/output port to output a conducting control signal, and the battery and the first energy storage component supply power to the load circuit together.
Illustratively, the threshold is set at 3.3V.
In some embodiments, the host input/output port is connected to the control terminal of the third switching element through an inverter, the host input/output port and the first pulse signal are respectively connected to two input terminals of an and gate, and an output terminal of the and gate is connected to the control terminal of the first switching element, so that when the first switching element is allowed to be turned on by outputting the turn-on control signal through the host input/output port, the turn-on of the first switching element is controlled by the first pulse signal.
Illustratively, the input/output port is connected with the control terminal of the third switching component through an inverter, and the input/output port and the first pulse signal are connected with the control terminal of the first switching component through a logic and gate together. When the battery voltage is higher than the set threshold, the level of the conduction control signal output from the input/output port is set low, and when the battery voltage is lower than or equal to the set threshold, the level of the conduction control signal output from the input/output port is set high. Through the connection mode, the third switch assembly is conducted when the battery voltage is larger than the set threshold, and the first switch assembly is allowed to be conducted when the battery voltage is smaller than or equal to the set threshold. When the voltage of the battery is less than or equal to the set threshold, the third switching component is turned off, and the first switching component is turned on or turned off under the control of the first pulse signal, so that the battery and the first energy storage component supply power to the load circuit in common, or the second energy storage component supplies power to the load circuit.
By adopting the circuit in the embodiment, when the battery voltage is lower, higher voltage can be provided for the load circuit, so that the capacity of the battery is fully utilized.
In some embodiments, the duty cycle of the first pulse signal and the second pulse signal output by the fuel gauge chip are both less than 0.5.
In the above embodiment, the duty ratios of the first pulse signal and the second pulse signal output by the fuel gauge chip are both less than 0.5, and the first pulse signal and the second pulse signal both have a dead time of Δ T, so that the first switch component and the second switch component controlled by the first pulse signal and the second pulse signal are sufficiently turned on or off to prevent the battery from being short-circuited. Exemplary waveforms of the first pulse signal and the second pulse signal are shown in fig. 4. Where Pulse2 represents the first Pulse signal and Pulse1 represents the second Pulse signal. The period of the two pulse signals is T.
In some embodiments, the first switching component comprises a first transistor and a second transistor, a first terminal of the first transistor is connected with the battery, and a second terminal of the first transistor is connected with a first terminal of the second transistor through the first energy storage component;
the first end of the second energy storage component is connected with the second end of the second transistor and is connected with the load circuit.
In the above embodiments, the first switching component includes a first transistor and a second transistor, and the first energy storage component is connected between the first transistor and the second transistor. The second energy storage assembly and the first switch assembly are connected with the load circuit so as to respectively supply power to the load circuit when the first switch assembly is cut off or conducted.
In some embodiments, the second switch component includes a third transistor and a fourth transistor, a first terminal of the third transistor is connected to the battery, a second terminal of the third transistor is connected to the first terminal of the third transistor through the first energy storage component, and a second terminal of the third transistor is grounded.
In the above embodiment, the second switching component includes a third transistor and a fourth transistor, and the first energy storage component is connected between the third transistor and the fourth transistor. When the second switch component is conducted, the battery charges the first energy storage component.
In some embodiments, the first energy storage assembly comprises a capacitor and a voltage regulator tube connected in parallel, and the voltage regulator tube has a voltage regulation value equal to a set voltage value;
the second energy storage component comprises a capacitor.
In this embodiment, the set voltage value is, for example, 0.7V. The set voltage value may be set according to actual needs.
A specific embodiment of the discharge protection circuit of the present disclosure is given below, and a circuit diagram of the specific embodiment is shown with reference to fig. 5.
The first switch component comprises transistors S3 and S4, the second switch component comprises transistors S1 and S2, the third switch component comprises a transistor Q3, the first energy storage component comprises a capacitor C and a voltage regulator tube which are connected in parallel, the second energy storage component comprises a capacitor Chold, an input/output port of a host is represented by I/O, and the first Pulse signal and the second Pulse signal are respectively represented by Pulse2 and Pulse 1. Cell represents a battery, and P + and P-represent interfaces of load circuits.
When the electricity meter chip detects that the battery voltage is higher (greater than 3.3V), after the host computer obtains the battery voltage information through the electricity meter chip, the conduction control signal output by the input/output port is controlled to be at low level, so that the transistor Q3 is conducted, and the battery directly supplies power to the load circuit. When the electricity meter chip detects that the battery voltage is lower (less than or equal to 3.3V), after the host computer obtains the battery voltage information through the electricity meter chip, the on control signal output by the input/output port is controlled to be at a high level, the transistor Q3 is cut off, and the first switch component or the second switch component is switched on to supply power to the load circuit.
As shown in fig. 4, when the Pulse1 outputs a high level, the Pulse2 outputs a low level, S1 and S2 in the second switch element are turned on, S3 and S4 in the first switch element are turned off, the battery Cell charges the capacitor C, the regulated voltage value of the regulator tube is 0.7V, and the voltage of the capacitor C is also 0.7V. The load circuit is now powered by the capacitor Chold. The threshold was set at 3.3V.
When the Pulse1 outputs a low level, the Pulse2 outputs a high level, the S1 and the S2 in the second switch assembly are disconnected, the S3 and the S4 in the first switch assembly are connected, and the battery Cell is connected in series with a parallel circuit of a capacitor C and a voltage regulator tube to supply power to a load circuit. And the battery Cell charges the capacitor Chold. At this time V p+ ＝V cell +0.7, so the output voltage is 4-3.45V in the low-voltage area where the battery voltage is 3.3-2.75V, thereby ensuring the normal operation of the whole machine and using the battery in the low-voltage area.
The ratio of the conventional cell phone battery dischargeable capacity and the battery dischargeable capacity of the present scheme to the low-voltage discharge capacity when the circuit of the embodiment of the present disclosure is used is Q2, the conventional discharge capacity is Q1, and Q1< Q2, for example, as shown in fig. 6.
Therefore, by adopting the circuit disclosed by the embodiment of the disclosure, the discharge capacity of a battery, such as a silicon-oxygen cathode battery, can be greatly improved without influencing the use of the whole machine.
The present disclosure also provides a battery assembly, as shown in fig. 7, the battery assembly 400 including:
a battery 200;
and a discharge protection circuit 100 connected to the battery 200.
Fig. 8 is a block diagram illustrating a terminal 800 according to an exemplary embodiment, the terminal 800 being powered by a battery assembly provided by the present disclosure.
Referring to fig. 8, the apparatus 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.
The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile and non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed state of the device 800, the relative positioning of the components, such as a display and keypad of the apparatus 800, the sensor assembly 814 may also detect a change in position of the apparatus 800 or a component of the apparatus 800, the presence or absence of user contact with the apparatus 800, orientation or acceleration/deceleration of the apparatus 800, and a change in temperature of the apparatus 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an example embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (11)
1. A discharge protection circuit, the circuit comprising:
a first switch assembly, a first end of which is connected with a battery, and a second end of which is connected with a load circuit;
the first energy storage assembly is connected with the first switch assembly so as to supply power to the load circuit by the battery and the first energy storage assembly together when the first switch assembly is conducted;
and the second energy storage assembly is connected with the load circuit so as to supply power to the load circuit by the second energy storage assembly when the first switch assembly is switched off, and the second energy storage assembly is also connected with the battery through the first switch assembly so as to charge the second energy storage assembly by the battery when the first switch assembly is switched on.
2. The discharge protection circuit of claim 1, wherein the circuit further comprises:
the first end of the second switch component is connected with the battery, the second end of the second switch component is grounded, and the second switch component is also connected with the first energy storage component, so that the battery charges the first energy storage component when the second switch component is switched on.
3. The discharge protection circuit of claim 2, wherein the circuit further comprises:
the fuel gauge chip is provided with a first pulse signal output end and a second pulse signal output end;
wherein the first pulse signal output terminal is connected to the control terminal of the first switch module, the second pulse signal output terminal is connected to the control terminal of the second switch module, and the first pulse signal and the second pulse signal are set such that the first switch module and the second switch module are not turned on simultaneously.
4. The discharge protection circuit of claim 3, wherein the circuit further comprises:
a third switch assembly, a first end of the third switch assembly being connected to the battery, a second end of the third switch assembly being connected to the load circuit.
5. The discharge protection circuit of claim 4, wherein the circuit further comprises:
and the host input/output port is connected with the control end of the third switch assembly and the control end of the first switch assembly, so that when the electricity meter chip detects that the battery voltage is greater than a set threshold value, the host input/output port outputs a conduction control signal to control the conduction of the third switch assembly, and when the electricity meter chip detects that the battery voltage is less than or equal to the set threshold value, the host input/output port outputs the conduction control signal to allow the conduction of the first switch assembly.
6. The discharge protection circuit of claim 5, wherein said host input/output port is connected to a control terminal of said third switching element through an inverter, said host input/output port and said first pulse signal are respectively connected to two input terminals of an AND gate, an output terminal of said AND gate is connected to a control terminal of said first switching element, so that when said conduction control signal is outputted through said host input/output port to allow said first switching element to conduct, conduction of said first switching element is controlled by said first pulse signal.
7. The discharge protection circuit of claim 3, wherein the duty cycle of the first pulse signal and the second pulse signal output by the fuel gauge chip are both less than 0.5.
8. The discharge protection circuit of claim 1,
the first switch component comprises a first transistor and a second transistor, wherein a first end of the first transistor is connected with the battery, and a second end of the first transistor is connected with a first end of the second transistor through the first energy storage component;
the first end of the second energy storage component is connected with the second end of the second transistor and is connected with the load circuit.
9. The discharge protection circuit of claim 2,
the second switch component comprises a third transistor and a fourth transistor, a first end of the third transistor is connected with the battery, a second end of the third transistor is connected with a first end of the third transistor through the first energy storage component, and a second end of the third transistor is grounded.
10. The discharge protection circuit of claim 8 or 9,
the first energy storage assembly comprises a capacitor and a voltage stabilizing tube which are connected in parallel, and the voltage stabilizing value of the voltage stabilizing tube is a set voltage value;
the second energy storage component comprises a capacitor.
11. A battery assembly, comprising:
a battery;
the discharge protection circuit of any of claims 1-10, connected to the battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220665603.3U CN217508311U (en) | 2022-03-25 | 2022-03-25 | Discharge protection circuit and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220665603.3U CN217508311U (en) | 2022-03-25 | 2022-03-25 | Discharge protection circuit and battery pack |
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| CN217508311U true CN217508311U (en) | 2022-09-27 |
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| CN202220665603.3U Active CN217508311U (en) | 2022-03-25 | 2022-03-25 | Discharge protection circuit and battery pack |
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