Electric quantity detection circuit and energy storage power supply

Abstract

The embodiment of the utility model discloses an electric quantity detection circuit and an energy storage power supply, and the circuit comprises a power supply module, a first indication module, a second indication module and a third indication module. Outputting a first control signal to enable a first indication module to generate a first indication signal; when the power supply voltage is greater than the first voltage, a second indication signal is generated, and a second control signal is output to cut off the first indication module; the third indication module generates a third indication signal when the power supply voltage is greater than the second voltage, and outputs a third control signal to enable the second indication module to stop generating the second indication signal; and when the power supply voltage is greater than the third voltage, the generation of the third indication signal is stopped, and a fourth control signal is output to cut off the second indication module. According to the embodiment of the utility model, the plurality of indication modules respectively generate different indication signals to prompt the voltage interval of the detection voltage, so that the voltage detection is realized, and the circuit structure can be simplified.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of electronic technology, and in particular to a power detection circuit and an energy storage power supply. Background Art

[0002] Lead-acid batteries use lead and lead oxide as electrode materials and sulfuric acid as the electrolyte. They are commonly used in applications such as automotive starting batteries, emergency lighting and backup power supplies, and solar and wind power systems.

[0003] Lead-acid batteries are prone to over-discharge during discharge, necessitating constant monitoring of their discharge status. Prior art systems typically use a central processing unit (CPU) to monitor the battery's voltage status. This requires the development and maintenance of complex software to manage multiple processors and sensors, making voltage status monitoring complex and costly. Utility Model Content

[0004] The main technical problem solved by the embodiments of the utility model is to provide a power detection circuit and an energy storage power supply, which can solve the problems of complex control process and high cost caused by the existing lead-acid battery using a CPU to detect the voltage state.

[0005] To solve the above technical problems, the present invention adopts a technical solution: to provide a power detection circuit, characterized in that it includes: a power module, a first indication module, a second indication module and a third indication module, the first indication module is respectively connected to the second indication module and the power module, the second indication module is respectively connected to the third indication module and the power module, and the third indication module is connected to the power module; the second indication module is configured to output a first control signal to the first indication module when the power voltage output by the power module is less than a preset first voltage, so that the first indication module generates a first indication signal; and when the power voltage is greater than the first voltage, form a power supply circuit, generate a second indication signal, and output a second control signal to the first indication module to cut off the power supply circuit of the first indication module; the third indication module is configured to generate a third indication signal when the power voltage is greater than a preset second voltage, and output a third control signal to the second indication module to cause the second indication module to stop generating the second indication signal; and when the power voltage is greater than the preset third voltage, stop generating the third indication signal and output a fourth control signal to the second indication module to cut off the power supply circuit of the second indication module; the third voltage is greater than the second voltage, and the second voltage is greater than the first voltage.

[0006] In some embodiments, the second indication module includes a second indication unit and a second driving unit, the second indication unit is respectively connected to the first indication module, the power module and the second driving unit, and the second driving unit is connected to the power module; the second indication unit is used to output the first control signal to the first indication module when the power supply voltage is less than the first voltage; the second driving module is used to output the first driving signal to the second indication unit when the power supply voltage is greater than the first voltage, so that the second indication unit and the power module form a loop, and the second indication unit generates the second indication signal.

[0007] In some embodiments, the third indication module includes a third indication unit, a third drive unit and a fourth drive unit, the third indication unit is respectively connected to the power supply module, the third drive unit, the fourth drive unit and the second indication module, and the third drive unit and the fourth drive unit are respectively connected to the power supply module; the third drive unit is used to output the third control signal to the third indication unit and the second indication module when the power supply voltage is greater than the second voltage, so as to respectively cause the third indication unit to generate the third indication signal and the second indication module to stop generating the second indication signal; the fourth drive unit is used to output the fourth control signal to the third indication unit and the second indication module when the power supply voltage is greater than the third voltage, so as to respectively cause the third indication unit to stop generating the third indication signal and cut off the power supply circuit of the second indication module.

[0008] In some embodiments, the first indication module includes a light-emitting diode LED1, a resistor R1, a resistor R2 and a transistor Q1, the anode of the light-emitting diode LED1 is connected to the positive pole of the power module, the cathode of the light-emitting diode LED1 is connected to the first end of the resistor R1, the second end of the resistor R1 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to the first end of the resistor R2, the second end of the resistor R2 is connected to the signal output end of the second indication module, and the emitter of the transistor Q1 is connected to the negative pole of the power module.

[0009] In some embodiments, the second indication unit includes a light-emitting diode LED2, a resistor R3, a resistor R4, a transistor Q2 and a transistor Q3, the anode of the light-emitting diode LED2 is connected to the positive electrode of the power module and the emitter of the transistor Q3, the cathode of the light-emitting diode LED2 is connected to the first end of the resistor R3 and the collector of the transistor Q3, the base of the transistor Q3 is connected to the first output end of the third indication module, the second end of the resistor R3 is connected to the signal input end of the first indication module and the collector of the transistor Q2; the base of the transistor Q2 is connected to the first end of the resistor R4, the second end of the resistor R4 is connected to the signal output end of the second driving unit and the second output end of the third indication module, and the emitter of the transistor Q2 is connected to the negative electrode of the power module.

[0010] In some embodiments, the second driving unit includes a voltage regulator diode D1, a resistor R5 and a resistor R10, the cathode of the voltage regulator diode D1 is connected to the positive electrode of the power module, the anode of the voltage regulator diode D1 is connected to the first end of the resistor R10, the second end of the resistor R10 is connected to the first end of the resistor R5, the second input end of the second indication unit and the second output end of the third indication module, and the second end of the resistor R5 is connected to the negative electrode of the power module.

[0011] In some embodiments, the third indication unit includes a transistor Q4, a resistor R6, a resistor R7 and a light-emitting diode LED3, the emitter of the transistor Q4 is connected to the positive pole of the power module, the base of the transistor Q4 is connected to the first end of the resistor R7 and the second input end of the second indication module, and the second end of the resistor R7 is connected to the signal output end of the third driving unit; the collector of the transistor Q4 is connected to the first end of the resistor R6, the second end of the resistor R6 is connected to the anode of the light-emitting diode LED3 and the signal output end of the fourth driving unit, and the cathode of the light-emitting diode LED3 is connected to the negative pole of the power module.

[0012] In some embodiments, the third driving unit includes a resistor R8 and a Zener diode D2, the first end of the resistor R8 is connected to the positive electrode of the power module, the second end of the resistor R8 is connected to the cathode of the Zener diode D2 and the first input end of the third indication unit, and the anode of the Zener diode D2 is connected to the negative electrode of the power module.

[0013] In some embodiments, the fourth driving unit includes a resistor R9, a resistor R11, a Zener diode D3 and a transistor Q5, the first end of the resistor R9 is connected to the positive electrode of the power module, the second end of the resistor R9 is connected to the cathode of the Zener diode D3, the base of the Zener diode D3 is connected to the first end of the resistor R11 and the base of the transistor Q5, the collector of the transistor Q5 is connected to the second input end of the second indication module and the second input end of the third indication unit, and the emitter of the transistor Q5 is connected to the second end of the resistor R11 and the negative electrode of the power module.

[0014] In order to solve the above technical problems, another technical solution adopted by the present invention is to provide an energy storage power supply, including the power detection circuit as described above.

[0015] The beneficial effect of the embodiment of the present utility model is: different from the prior art, the embodiment of the present utility model sets up several indication modules to generate corresponding indication signals when the detection voltage is in different voltage ranges, so as to prompt the voltage range of the detection voltage, thereby realizing voltage detection, eliminating the setting of the CPU and the corresponding control logic, thereby improving the stability of the circuit and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a power detection circuit provided by an embodiment of the utility model;

[0017] Figure 2 This is a structural diagram of a second indication module provided by an embodiment of the present utility model;

[0018] Figure 3 This is a structural diagram of a third indication module provided by an embodiment of the present utility model;

[0019] Figure 4 This is a circuit principle diagram of a power detection circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in this specification and in the description of this utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the relevant listed items.

[0022] In order to solve the problems of complex control process and high cost caused by the existing battery power detection, such as the power detection of lead-acid batteries, which uses the CPU to detect the voltage state, the embodiment of the utility model provides a power detection circuit, the structural diagram of which is shown in FIG. Figure 1 As shown, the power detection circuit includes a power module 100 , a first indication module 200 , a second indication module 300 and a third indication module 400 .

[0023] The first indication module 200 is connected to the second indication module 300 and the power module respectively. The second indication module 300 is connected to the third indication module 400 and the power module 100 respectively. The third indication module 400 is connected to the power module 100.

[0024] Specifically, the second indication module 300 is used to output a first control signal to the first indication module 200 when the power supply voltage output by the power supply module 100 is less than a preset first voltage, so that the first indication module 200 generates a first indication signal; the second indication module 300 is also used to form a power supply circuit with the power supply module 100 when the power supply voltage is greater than the first voltage, generate a second indication signal, and output a second control signal to the first indication module 200 to cut off the power supply circuit between the first indication module 200 and the power supply module 100.

[0025] The third indication module 400 is used to generate a third indication signal when the power supply voltage is greater than a preset second voltage, and output a third control signal to the second indication module 300 to stop the second indication module 200 from generating the second indication signal, such as short-circuiting the indication signal generating source of the second indication module 300 without cutting off the power supply circuit between the second indication module 300 and the power supply module 100; the third indication module 400 is also used to stop generating the third indication signal when the power supply voltage is greater than a preset third voltage, and output a fourth control signal to the second indication module 300 to cut off the power supply circuit between the second indication module 300 and the power supply module 100.

[0026] As an example and not a limitation, the first indication signal, the second indication signal and the third indication signal are optical signals, and the first indication module 200, the second indication module 300 and the third indication module 400 are each provided with a light-emitting device as a source of the corresponding indication signal, such as a light-emitting diode that generates light of different colors.

[0027] It should be noted that the third voltage is greater than the second voltage, and the second voltage is greater than the first voltage.

[0028] In some embodiments of the present application, a second indication module is provided, and its structural diagram is as follows: Figure 2 As shown, the second indication module 300 includes a second indication unit 310 and a second driving unit 320 .

[0029] The second indication unit 310 is respectively connected to the first indication module 200, the power module 100 and the second driving unit 320, and the second driving unit 320 is connected to the power module 100; the second indication unit 310 is used to output a first control signal to the first indication module 200 when the power supply voltage is less than the first voltage; the second driving module 320 is used to output a first driving signal to the second indication unit 310 when the power supply voltage is greater than the first voltage, so that the second indication unit 310 and the power module 100 form a loop, and the second indication unit 310 generates a second indication signal.

[0030] In some embodiments of the present application, a third indication module is provided, whose structural diagram is as follows: Figure 3 As shown, the third indication module 400 includes a third indication unit 410 , a third driving unit 420 and a fourth driving unit 430 .

[0031] The third indication unit 410 is connected to the power module 100 , the third driving unit 420 , the fourth driving unit 430 and the second indication module 300 respectively. The third driving unit 420 and the fourth driving unit 430 are connected to the power module 100 respectively.

[0032] The third driving unit 420 is configured to output a third control signal to the third indication unit 410 and the second indication module 300 when the power supply voltage is greater than the second voltage, so as to respectively cause the third indication unit 410 to generate the third indication signal and the second indication module 300 to stop generating the second indication signal.

[0033] The fourth driving unit 430 is used to output a fourth control signal to the third indication unit 410 and the second indication module 300 when the power supply voltage is greater than the third voltage, so as to respectively stop the third indication unit 410 from generating the third indication signal and cut off the power supply circuit of the second indication module 300.

[0034] Figure 4This is a circuit schematic diagram of a power detection circuit provided in an embodiment of the present application. The power detection circuit includes a power module 100, a first indication module 200, a second indication module 300 and a third indication module 400. The second indication module 300 includes a second indication unit 310 and a second drive unit 320, and the third indication module 400 includes a third indication unit 410, a third drive unit 420 and a fourth drive unit 430.

[0035] The first indication module 200 includes a light-emitting diode LED1, a resistor R1, a resistor R2, and a transistor Q1. The anode of the light-emitting diode LED1 is connected to the positive electrode of the power module 100, the cathode of the light-emitting diode LED1 is connected to the first end of the resistor R1, the second end of the resistor R1 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to the first end of the resistor R2, and the second end of the resistor R2 is connected to the signal output end (i.e., Figure 4 The collector of the transistor Q2 is connected to the cathode of the power module 100, and the emitter of the transistor Q1 is connected to the cathode of the power module 100. The resistor R1 is a current limiting resistor of the light emitting diode LED1.

[0036] The second indicating unit 310 includes a light emitting diode LED2, a resistor R3, a resistor R4, a transistor Q2, and a transistor Q3. The second driving unit 320 includes a voltage stabilizing diode D1, a resistor R5, and a resistor R10.

[0037] The anode of the light-emitting diode LED2 is connected to the positive electrode of the power module 100 and the emitter of the transistor Q3, the cathode of the light-emitting diode LED2 is connected to the first end of the resistor R3 and the collector of the transistor Q3, and the base of the transistor Q3 is connected to the first output end (i.e. Figure 4 The base of the transistor Q4 is connected to the second end of the resistor R3 and the signal input end of the first indication module 200 (ie Figure 4 The second end of the resistor R2 is connected to the collector of the transistor Q2. The resistor R3 is a current limiting resistor for the light emitting diode LED2.

[0038] The base of the transistor Q2 is connected to the first end of the resistor R4, and the second end of the resistor R4 is connected to the signal output end of the second driving unit 320 (ie Figure 4 The second end of the resistor R10 shown in FIG. 1 and the second output end of the third indication module 400 (ie Figure 4 The collector of the transistor Q5 is connected, and the emitter of the transistor Q2 is connected to the negative electrode of the power module 100.

[0039] The cathode of the voltage stabilizing diode D1 is connected to the positive electrode of the power module 100, the anode of the voltage stabilizing diode D1 is connected to the first end of the resistor R10, the second end of the resistor R10 is connected to the first end of the resistor R5, and the second input end of the second indication unit 310 (i.e. Figure 4 The second end of the resistor R4 shown) and the second output end of the third indication module 400 (ie Figure 4 The collector of the transistor Q5 is connected, and the second end of the resistor R5 is connected to the negative electrode of the power module 100.

[0040] In the embodiment of the present application, the first control signal is a high-level voltage signal, the second control signal is a low-level voltage signal, and the first driving signal is a high-level voltage signal.

[0041] The third indicating unit 410 includes a transistor Q4, resistors R6, R7 and a light emitting diode LED3. The third driving unit 420 includes a resistor R8 and a Zener diode D2. The fourth driving unit 430 includes a resistor R9, R11, a Zener diode D3 and a transistor Q5.

[0042] The emitter of the transistor Q4 is connected to the positive electrode of the power module 100, and the base of the transistor Q4 is connected to the first end of the resistor R7 and the second input end of the second indication module 300 (ie Figure 4 The base of the transistor Q3 is connected to the second end of the resistor R7 and the signal output end of the third driving unit 420 (ie Figure 4 The second end of the resistor R8 is connected.

[0043] The collector of the transistor Q4 is connected to the first end of the resistor R6, the second end of the resistor R6 is connected to the anode of the light emitting diode LED3 and the signal output end of the fourth driving unit 430 (ie Figure 4 The anode of the voltage stabilizing diode D3 is connected to the cathode of the light emitting diode LED3 and the negative electrode of the power module 100. The resistor R6 is a current limiting resistor of the light emitting diode LED3.

[0044] The first end of the resistor R8 is connected to the positive electrode of the power module 100, the second end of the resistor R8 is connected to the cathode of the voltage stabilizing diode D2 and the first input end of the third indicating unit 420 (ie Figure 4 The base of the transistor Q4 is connected, and the anode of the voltage regulator diode D2 is connected to the negative electrode of the power module 100.

[0045] The first end of the resistor R9 is connected to the positive electrode of the power module 100, the second end of the resistor R9 is connected to the cathode of the voltage-stabilizing diode D3, the acting end of the voltage-stabilizing diode D3 is connected to the first end of the resistor R11 and the base of the transistor Q5, the collector of the transistor Q5 and the second input end of the second indication module 300 (i.e. Figure 4The second end of the resistor R4 shown) and the second input end of the third indicating unit 420 (ie Figure 4 The emitter of the transistor Q5 is connected to the second end of the resistor R11 and the negative electrode of the power module 100.

[0046] In the embodiment of the present application, the third control signal is a low-level voltage signal, and the fourth control signal is a low-level voltage signal.

[0047] By way of example and not limitation, power module 100 is a battery with a rated output voltage of 12V. Zener diode D1 has a breakdown voltage of 10V, Zener diode D2 has a breakdown voltage of 12V, and Zener diode D3 has a breakdown voltage of 14V. LED1 emits red light, LED2 emits orange light, and LED3 emits green light. Accordingly, the preset first voltage is 10V, the second voltage is 12V, and the third voltage is 14V.

[0048] Based on the above example Figure 4 The circuit shown is specifically described. When the battery voltage is between 0-10V, since the voltage regulator diode D1 has not yet broken down, the transistor Q2 is non-conductive, that is, the light-emitting diode LED2 is off. However, a small current still flows through the light-emitting diode LED2, and the resistance of the resistor R2 is large. Therefore, the voltage across the resistor R2 is high, causing the transistor Q1 to be conductive. At this time, the battery, the light-emitting diode LED1, the resistor R1 and the transistor Q1 form a loop, and the light-emitting diode LED1 emits red light, indicating that the battery voltage is less than 10V, that is, the battery is in an undervoltage state.

[0049] When the battery voltage is between 10-12V, the Zener diode D1 is reversely broken down. At this time, the voltage across the resistor R4 is high, the transistor Q2 is turned on, and the voltage across the resistor R2 is low, then the transistor Q1 is turned off. Therefore, the loop formed by the battery, light-emitting diode LED1, resistor R1 and transistor Q1 is cut off, making the light-emitting diode LED1 extinguished. The battery, light-emitting diode LED2, resistor R3 and transistor Q2 form a loop, and the light-emitting diode LED2 emits orange light, indicating that the battery voltage is less than 10-12V, that is, the battery power is moderate.

[0050] When the battery voltage is between 12-14V, the Zener diode D2 is reversely broken down, and the emitter voltage of the transistor Q3 and the transistor Q4 is greater than the base voltage, that is, the transistor Q3 and the transistor Q4 are turned on, and the transistor Q3 short-circuits the light-emitting diode LED2. However, the transistor Q2 is still turned on, so the light-emitting diodes LED1 and LED2 are turned off. The battery, transistor Q4, resistor R6 and light-emitting diode LED2 form a loop, and the light-emitting diode LED3 emits green light, indicating that the battery is saturated.

[0051] When the battery voltage is above 14V, the voltage-stabilizing diode D3 is reversely broken down. At this time, the base of the transistor Q5 is at a high level, and the transistor Q5 is turned on, pulling down the voltage of the light-emitting diode LED3, that is, the light-emitting diode LED3 is off. The voltage across the other end of the resistor R4 is low, and the transistor Q2 is not turned on, that is, the light-emitting diode LED2 is not lit. The battery, the light-emitting diode LED1, the resistor R1 and the transistor Q1 form a loop. At this time, the light-emitting diode LED1 emits red light, while the light-emitting diodes LED2 and LED3 are off, indicating that the battery voltage is abnormally high; thereby reminding the user of the battery power status.

[0052] Different from the prior art, the embodiment of the present invention sets up several indication modules to generate corresponding indication signals when the detection voltage is in different voltage ranges, so as to prompt the voltage range of the detection voltage, thereby realizing voltage detection, eliminating the need for the CPU and the corresponding control logic settings, thereby improving the stability of the circuit and reducing costs.

[0053] Based on the power detection circuit provided in the above embodiments, an embodiment of the present application further provides an energy storage power supply, which includes the power detection circuit as described in any of the above embodiments.

[0054] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of the present invention; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A power detection circuit, characterized in that: include: a power supply module, a first indication module, a second indication module and a third indication module, The first indication module is connected to the second indication module and the power module respectively, the second indication module is connected to the third indication module and the power module respectively, and the third indication module is connected to the power module; The second indication module is configured to output a first control signal to the first indication module when the power voltage output by the power module is lower than a preset first voltage, so that the first indication module generates a first indication signal; and forming a power supply circuit when the power supply voltage is greater than the first voltage, generating a second indication signal, and outputting a second control signal to the first indication module to cut off the power supply circuit of the first indication module; The third indication module is configured to generate a third indication signal when the power supply voltage is greater than a preset second voltage, and output a third control signal to the second indication module to cause the second indication module to stop generating the second indication signal; and when the power supply voltage is greater than a preset third voltage, stopping generating the third indication signal and outputting a fourth control signal to the second indication module to cut off the power supply circuit of the second indication module; The third voltage is greater than the second voltage, and the second voltage is greater than the first voltage.

2. The circuit according to claim 1, wherein: The second indication module includes a second indication unit and a second driving unit. The second indication unit is connected to the first indication module, the power module and the second driving unit respectively, and the second driving unit is connected to the power module; The second indication unit is configured to output the first control signal to the first indication module when the power supply voltage is lower than the first voltage; The second driving unit is configured to output a first driving signal to the second indicating unit when the power supply voltage is greater than the first voltage, so that the second indicating unit and the power module form a loop, and the second indicating unit generates the second indicating signal.

3. The circuit according to claim 1, wherein: The third indication module includes a third indication unit, a third driving unit and a fourth driving unit. The third indication unit is connected to the power module, the third driving unit, the fourth driving unit and the second indication module respectively, and the third driving unit and the fourth driving unit are connected to the power module respectively; The third driving unit is configured to output the third control signal to the third indication unit and the second indication module when the power supply voltage is greater than the second voltage, so as to respectively cause the third indication unit to generate the third indication signal and the second indication module to stop generating the second indication signal; The fourth driving unit is used to output the fourth control signal to the third indication unit and the second indication module when the power supply voltage is greater than the third voltage, so as to respectively cause the third indication unit to stop generating the third indication signal and cut off the power supply circuit of the second indication module.

4. The circuit according to claim 1, wherein: The first indication module includes a light emitting diode LED1, a resistor R1, a resistor R2 and a transistor Q1. The anode of the light-emitting diode LED1 is connected to the positive electrode of the power module, the cathode of the light-emitting diode LED1 is connected to the first end of the resistor R1, the second end of the resistor R1 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to the first end of the resistor R2, the second end of the resistor R2 is connected to the signal output end of the second indication module, and the emitter of the transistor Q1 is connected to the negative electrode of the power module.

5. The circuit according to claim 2, characterized in that The second indicating unit includes a light emitting diode LED2, a resistor R3, a resistor R4, a transistor Q2 and a transistor Q3. The anode of the light-emitting diode LED2 is connected to the positive electrode of the power module and the emitter of the transistor Q3, the cathode of the light-emitting diode LED2 is connected to the first end of the resistor R3 and the collector of the transistor Q3, the base of the transistor Q3 is connected to the first output end of the third indication module, and the second end of the resistor R3 is connected to the signal input end of the first indication module and the collector of the transistor Q2; The base of the transistor Q2 is connected to the first end of the resistor R4, the second end of the resistor R4 is connected to the signal output end of the second drive unit and the second output end of the third indication module, and the emitter of the transistor Q2 is connected to the negative electrode of the power module.

6. The circuit according to claim 2, characterized in that The second driving unit includes a voltage stabilizing diode D1, a resistor R5 and a resistor R10. The cathode of the voltage-stabilizing diode D1 is connected to the positive electrode of the power module, the anode of the voltage-stabilizing diode D1 is connected to the first end of the resistor R10, the second end of the resistor R10 is connected to the first end of the resistor R5, the second input end of the second indication unit and the second output end of the third indication module, and the second end of the resistor R5 is connected to the negative electrode of the power module.

7. The circuit according to claim 3, characterized in that The third indicating unit includes a transistor Q4, a resistor R6, a resistor R7 and a light emitting diode LED3. The emitter of the transistor Q4 is connected to the positive electrode of the power module, the base of the transistor Q4 is connected to the first end of the resistor R7 and the second input end of the second indication module, and the second end of the resistor R7 is connected to the signal output end of the third driving unit; The collector of the transistor Q4 is connected to the first end of the resistor R6, the second end of the resistor R6 is connected to the anode of the light-emitting diode LED3 and the signal output end of the fourth driving unit, and the cathode of the light-emitting diode LED3 is connected to the negative electrode of the power module.

8. The circuit according to claim 3, characterized in that The third driving unit includes a resistor R8 and a voltage stabilizing diode D2. The first end of the resistor R8 is connected to the positive electrode of the power module, the second end of the resistor R8 is connected to the cathode of the voltage regulator diode D2 and the first input end of the third indication unit, and the anode of the voltage regulator diode D2 is connected to the negative electrode of the power module.

9. The circuit according to claim 3, characterized in that The fourth driving unit includes a resistor R9, a resistor R11, a voltage stabilizing diode D3 and a transistor Q5. The first end of the resistor R9 is connected to the positive electrode of the power module, the second end of the resistor R9 is connected to the cathode of the Zener diode D3, the base of the Zener diode D3 is connected to the first end of the resistor R11 and the base of the transistor Q5, the collector of the transistor Q5 is connected to the second input end of the second indication module and the second input end of the third indication unit, and the emitter of the transistor Q5 is connected to the second end of the resistor R11 and the negative electrode of the power module.

10. An energy storage power supply, characterized in that: include: The power detection circuit according to any one of claims 1 to 9.

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