CN-121984184-A - Energy storage device and external device battery self-adaptive charging control circuit thereof

Abstract

The invention discloses energy storage equipment and an external equipment battery self-adaptive charging control circuit thereof, comprising a memristor, a first end, a second end and a control circuit, wherein the first end is connected to a charging interface; the memristor can set and maintain the resistance value of the memristor in one of a plurality of discrete resistance states under external electric excitation, the excitation module is used for providing excitation control voltage for the memristor to switch the resistance value of the memristor, the input end of the voltage detection module is connected to the first end and the second end of the memristor respectively and used for detecting feedback signals representing the charging voltage, the controller is used for judging the battery health state of external equipment based on the feedback signals, and when the battery health state is judged to be abnormal, the excitation control voltage applied to the memristor is adjusted through the excitation module so as to switch the resistance state of the memristor to adjust the charging voltage. The high-precision high-stability monitoring and self-adaptive control charging of the battery state of the charged equipment are realized, so that the charging safety and the battery life are improved.

Inventors

• WAN CHUAN
• LI ZAN
• YANG WEI

Assignees

• 深圳市南和移动通信科技股份有限公司

Dates

Publication Date

20260505

Application Date

20260212

Claims (10)

1. 1. An external device battery adaptive charge control circuit for an energy storage device for charging an external device, the circuit comprising: The memristor (1) can set and maintain the resistance value of the memristor (1) in one of a plurality of discrete resistance states under external electric excitation; The output end of the excitation module (3) is connected to the control end of the memristor (1) and is used for providing excitation control voltage for the memristor (1) so as to switch the resistance value of the memristor (1); The input end of the voltage detection module (4) is respectively connected to the first end and the second end of the memristor (1) and is used for detecting a feedback signal (Vout) representing the magnitude of charging voltage; And the controller (5) is respectively connected with the voltage detection module (4) and the excitation module (3), and the controller (5) is used for judging the battery health state of the external equipment based on the feedback signal, and when judging that the battery health state is abnormal, the excitation control voltage applied to the memristor (3) is adjusted through the excitation module (3) so as to switch the resistance state of the excitation control voltage, so that the charging voltage is adjusted.
2. 2. The external device battery adaptive charge control circuit according to claim 1, wherein the voltage detection module (4) includes an operational amplifier (41) and a power management chip (42), wherein: the non-inverting input end of the operational amplifier (41) is connected with the first end of the memristor (1), and the output end of the operational amplifier (41) is connected to the power management chip (42) and is used for outputting a feedback signal (Vout) representing the magnitude of charging voltage; the power management chip (42) is in signal connection with the controller (5), and the power management chip (42) is used for outputting the magnitude of the feedback signal (Vout) to the controller (5).
3. 3. The external device battery adaptive charge control circuit according to claim 2, wherein the output of the operational amplifier (4) is fed back to the inverting input via a first resistor (R1), and the inverting input is grounded via a second resistor (R2).
4. 4. The external device battery adaptive charge control circuit of claim 2, further comprising: The switch regulation and control module (6) is in signal connection with the power management chip (42), and the switch regulation and control module (6) responds to a control signal output by the controller (5) to regulate and control the charging voltage of the external equipment.
5. 5. The battery adaptive charge control circuit of an external device of any one of claims 1-4, wherein the plurality of discrete resistance states correspond to different standard charge voltage steps, respectively.
6. 6. The battery adaptive charging control circuit for an external device according to any one of claims 1 to 4, wherein the charging interface (2) is a USB interface or a Type-C interface, and a potential of a connection terminal connected to the first end of the memristor (1) in the charging interface (2) is a fixed value.
7. 7. The external device battery adaptive charge control circuit of claim 6, further comprising: The memristor comprises a transistor (N1), a first end of the transistor (N1) is connected to the charging interface (2) through the transistor (N1), a second end of the transistor (N1) is connected to the first end of the memristor (1), and a control end of the transistor (N1) is connected to the controller (5); The transistor (N1) responds to the effective level of the controller (5) to conduct the first end and the second end, so that the wiring terminal is grounded through the memristor (1), and charging work is started.
8. 8. The battery adaptive charge control circuit for an external device according to claim 6, wherein the controller (5) monitors a voltage-time curve during charging, and determines that abnormality is occurred when a degree to which the voltage-time curve deviates from a preset standard healthy charge curve exceeds a preset tolerance.
9. 9. An energy storage device comprising an external device battery adaptive charge control circuit as claimed in any one of claims 1 to 8.
10. 10. The energy storage device of claim 9, wherein the energy storage device is a charger baby having a hot spot function.

Description

Energy storage device and external device battery self-adaptive charging control circuit thereof Technical Field The invention relates to the technical field of battery management, in particular to energy storage equipment and an external equipment battery self-adaptive charging control circuit thereof. Background Portable energy storage devices (e.g., charger) have become an indispensable electronic product in modern life. To enhance functionality, the prior art has developed a charger baby that integrates mobile hotspot (MiFi) functionality, which incorporates a complex power management circuit inside for charging external devices (e.g., cell phones). In the charging process, it is important to accurately judge the battery health state of the charged equipment, so that the potential safety hazards caused by overcharge and undercharge and even battery degradation can be effectively avoided. Currently, the determination of the state of health of a battery is mostly dependent on monitoring the charging voltage and current. A common monitoring scheme is to use a resistance-based sampling circuit in combination with a software algorithm. However, such schemes have inherent drawbacks in that the resistance of the common resistive element may drift in temperature with operating temperature and is sensitive to fluctuations in supply voltage. This results in distortion of the sampled voltage/current signal, which does not accurately reflect the true state of charge, thus making the battery health determination based on this signal less reliable and more error. In addition, some external devices lack a battery health monitoring mechanism. Therefore, the technical problem to be solved in the art is how to realize high-precision and high-stability monitoring of the battery health state of the charged device and adaptively control charging so as to improve the charging safety and the battery life. Disclosure of Invention Based on the above-mentioned current situation, the main objective of the present invention is to provide an energy storage device and an external device battery adaptive charging control circuit thereof, so as to realize high-precision and high-stability monitoring of the battery state of the charged device and adaptive control charging, thereby improving charging safety and battery life. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: In a first aspect, an embodiment of the present invention discloses an external device battery adaptive charging control circuit of an energy storage device, where the energy storage device is used to charge the external device, and the circuit includes: the memristor can set and maintain the resistance value of the memristor in one of a plurality of discrete resistance states under external electric excitation; the output end of the excitation module is connected to the control end of the memristor and is used for providing excitation control voltage for the memristor so as to switch the resistance value of the memristor; The input end of the voltage detection module is connected to the first end and the second end of the memristor respectively and is used for detecting a feedback signal representing the charging voltage; and when the battery health state is judged to be abnormal, the excitation control voltage applied to the memristor is adjusted through the excitation module so as to switch the resistance state of the memristor, and the charging voltage is adjusted. Optionally, the voltage detection module comprises an operational amplifier and a power management chip, wherein: The non-inverting input end of the operational amplifier is connected with the first end of the memristor, and the output end of the operational amplifier is connected to the power management chip and used for outputting a feedback signal representing the magnitude of the charging voltage; The power management chip is in signal connection with the controller and is used for outputting the magnitude of the feedback signal to the controller. Optionally, the output end of the operational amplifier is fed back to the inverting input end through the first resistor, and the inverting input end is grounded through the second resistor. Optionally, the method further comprises: The switch regulation and control module is in signal connection with the power management chip and responds to a control signal output by the controller to regulate and control the charging voltage of the external equipment. Optionally, the plurality of discrete resistance states respectively correspond to different standard charging voltage gears. Optionally, the charging interface is a USB interface or a Type-C interface, and a potential of a connection terminal connected to the first end of the memristor in the charging interface is a fixed value. Optionally, the method further comprises: The memristor is connected to the charging interface through the transistor, the firs