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. The circuit comprises a power supply module, a driving module and an indicating module, the power supply module is respectively connected with a power supply to be detected, the driving module and the indicating module, and the driving module is respectively connected with the power supply to be detected and the indicating module; the power supply module is used for outputting a power supply voltage when the detection voltage is greater than a preset conduction voltage; the driving module is used for correspondingly outputting a driving signal pair in response to the detection voltage when receiving the power supply voltage; the indication module is used for correspondingly generating indication signals in response to different driving signal pairs under the action of the power supply voltage; the indication signal is used for prompting that the detection voltage is in a corresponding preset voltage interval. According to the embodiment of the utility model, the driving module outputs the corresponding driving signal according to the detection voltage, and the indication module generates the corresponding indication signal according to the different driving signals to prompt the voltage interval of the detection voltage, so that the structure of the electric quantity detection circuit can be simplified.

Description

Technical Field

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

[0002] A battery State of Charge (SOC) display system is an integrated system involving hardware and software, mainly used to monitor and display the remaining power of a battery. Traditional battery power display systems usually rely on a sampling IC (integrated circuit) and software algorithms, plus an LED display to show power information.

[0003] The sampling IC is used to monitor parameters such as the voltage and current of the battery in real time, and then processes and analyzes these parameters through software algorithms to estimate the remaining power of the battery. This implementation method requires dedicated hardware and software support. Although it can provide relatively accurate power display, the circuit structure is complex and the cost is relatively high. Summary of the Utility Model

[0004] The main technical problem to be solved by the embodiments of the present utility model is to provide a power detection circuit and a power detection device, which can solve the problems of complex circuit structure and high cost of the existing battery power detection circuit.

[0005] To solve the above technical problem, a technical solution adopted by the present utility model is: to provide a power detection circuit, including: a power supply module, a driving module, and an indication module. The power supply module is respectively connected to a power supply to be detected, the driving module, and the indication module. The driving module is respectively connected to the power supply to be detected and the indication module. The power supply module is used to output a supply voltage when the detection voltage output by the power supply to be detected is greater than a preset conduction voltage. The driving module is used to output a first driving signal pair, a second driving signal pair, or a third driving signal pair in response to the detection voltage when receiving the supply voltage. The indication module is used to generate a first indication signal, a second indication signal, or a third indication signal in response to the first driving signal pair, the second driving signal pair, or the third driving signal pair under the action of the supply voltage. The first indication signal is used to indicate that the detection voltage is in a preset first voltage range. The second indication signal is used to indicate that the detection voltage is in a preset second voltage range. The third indication signal is used to indicate that the detection voltage is in a preset third voltage range.

[0006] In some embodiments, the driving module includes a voltage dividing unit and a comparison unit. The voltage dividing unit is respectively connected to the power supply module and the comparison unit, and the comparison unit is respectively connected to the power supply to be detected and the indicating module. The voltage dividing unit is configured to respectively output a first voltage signal and a second voltage signal under the action of the supply voltage, and the comparison unit outputs the first driving signal pair, the second driving signal pair or the third driving signal pair correspondingly in response to the first voltage signal, the second voltage signal and the detection voltage.

[0007] In some embodiments, the first driving signal pair includes a first driving signal and a second driving signal, the second driving signal pair includes a third driving signal and the second driving signal, and the third driving signal pair includes the third driving signal and a fourth driving signal. When the detection voltage is in the first voltage range, the comparison unit respectively outputs the first driving signal and the second driving signal to the indicating module. When the detection voltage is in the second voltage range, the comparison unit respectively outputs the third driving signal and the second driving signal to the indicating module. When the detection voltage is in the third voltage range, the comparison unit respectively outputs the third driving signal and the fourth driving signal to the indicating module.

[0008] In some embodiments, the power supply module includes a power supply, a switching unit and a voltage stabilizing unit. The switching unit is respectively connected to the power supply, the power supply to be detected and the voltage stabilizing unit, and the voltage stabilizing unit is respectively connected to the driving module and the indicating module. The power supply is configured to output a first voltage to the switching unit, the switching unit is configured to output the first voltage to the voltage stabilizing unit when the detection voltage is greater than the conduction voltage, and the voltage stabilizing unit is configured to convert the first voltage into the supply voltage.

[0009] In some embodiments, the comparison unit includes a comparator U2A, a comparator U2B, a control switch J1, and a resistor R7. The first end of the control switch J1 is connected to the positive pole of the power supply to be detected. The second end of the control switch J1 is respectively connected to the first end of the resistor R1, the inverting input terminal of the comparator U2B, and the inverting input terminal of the comparator U2A. The non-inverting input terminal of the comparator U2A is connected to the first output terminal of the voltage dividing unit. The non-inverting input terminal of the comparator U2B is connected to the second output terminal of the voltage dividing unit. The output terminal of the comparator U2A is connected to the second input terminal of the indication module. The output terminal of the comparator U2B is connected to the third input terminal of the indication module. The positive pole of the power supply terminal of the comparator U2A is respectively connected to the output terminal of the power supply module and the positive pole of the power supply terminal of the comparator U2B. The negative pole of the power supply terminal of the comparator U2A and the negative pole of the power supply terminal of the comparator U2B are grounded.

[0010] In some embodiments, the voltage dividing unit includes a resistor R1, a resistor R2, and a resistor R3. The first end of the resistor R1 is connected to the output terminal of the power supply module. The second end of the resistor R1 is respectively connected to the first end of the resistor R2 and the first input terminal of the comparison unit. The second end of the resistor R2 is respectively connected to the first end of the resistor R3 and the second input terminal of the comparison unit. The second end of the resistor R3 is grounded.

[0011] In some embodiments, the switch unit includes a triode Q2, a triode Q3, and a resistor R10. The emitter of the triode Q2 is connected to the positive pole of the power supply. The base of the triode Q2 is connected to the first end of the resistor R10. The collector of the triode Q2 is connected to the input terminal of the voltage stabilizing unit. The second end of the resistor R10 is connected to the collector of the triode Q3. The base of the triode Q3 is connected to the positive pole of the power supply to be detected. The emitter of the triode Q3 is grounded.

[0012] In some embodiments, the voltage stabilizing unit includes a voltage regulator U1 and a capacitor C1. The first end of the capacitor C1 is respectively connected to the output terminal of the switch unit and the input terminal of the voltage regulator U1. The output terminal of the voltage regulator U1 is respectively connected to the input terminal of the driving module and the first input terminal of the indication module. The grounding terminal of the voltage regulator U1 and the second end of the capacitor C1 are grounded.

[0013] In some embodiments, the indication module includes a resistor R4, a resistor R5, a resistor R6, a light-emitting diode LED1, a light-emitting diode LED2, and a light-emitting diode LED3. The first end of the resistor R5 is connected to the output end of the power supply module. The second end of the resistor R5 is connected to the anode of the light-emitting diode LED1. The cathode of the light-emitting diode LED1 is respectively connected to the first end of the resistor R6 and the first output end of the driving module. The second end of the resistor R6 is connected to the anode of the light-emitting diode LED2. The cathode of the light-emitting diode LED2 is respectively connected to the first end of the resistor R4 and the second output end of the driving module. The second end of the resistor R4 is connected to the anode of the light-emitting diode LED3. The cathode of the light-emitting diode LED3 is grounded.

[0014] To solve the above technical problem, another technical solution adopted by the present utility model is: to provide an energy storage power supply, including: the power quantity detection circuit as described above.

[0015] The beneficial effects of the embodiments of the present utility model are: different from the prior art, the embodiments of the present utility model are provided with a driving module and an indication module. The driving module outputs corresponding driving signals according to the detected voltage of the power supply to be detected, and the indication module generates corresponding indication signals according to different driving signals to prompt the voltage range of the detected voltage, so as to realize voltage detection, which can simplify the structure of the power quantity detection circuit, improve the stability of the circuit, and reduce costs. Description of the Drawings

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

[0017] Figure 2 is a schematic structural diagram of a power supply module provided by an embodiment of the present utility model;

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

[0019] Figure 4 is a circuit structure diagram of a power quantity detection circuit provided by an embodiment of the present utility model. Detailed Embodiments

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

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

[0022] An embodiment of the present application provides a power detection circuit, and its structural schematic diagram is as Figure 1 shown. The power detection circuit includes a power supply module 110, a driving module 120, and an indication module 130. The power supply module 110 is respectively connected to the power supply to be detected 20, the driving module 120, and the indication module 130. The driving module 120 is respectively connected to the power supply to be detected 20 and the indication module 130.

[0023] The power supply module 110 is configured to output a supply voltage when the detection voltage output by the power supply to be detected 20 is greater than a preset conduction voltage. The driving module 120 is configured to output a first driving signal pair, a second driving signal pair, or a third driving signal pair in response to the supply voltage and in response to the detection voltage. That is, in response to the detection voltage, one of the first driving signal pair, the second driving signal pair, and the third driving signal is output accordingly.

[0024] The indication module 130 is configured to generate a first indication signal, a second indication signal, or a third indication signal in response to the first driving signal pair, the second driving signal pair, or the third driving signal pair under the action of the supply voltage. The first indication signal is used to indicate that the detection voltage is in a preset first voltage range, the second indication signal is used to indicate that the detection voltage is in a preset second voltage range, and the third indication signal is used to indicate that the detection voltage is in a preset third voltage range.

[0025] By way of example and not limitation, the preset conduction voltage is 0.7V, the preset first voltage range is 3V - the maximum output voltage of the power supply to be detected, the preset second voltage range is 2V - 3V, and the preset third voltage range is 1V - 2V. When the detection voltage output by the power supply 20 to be detected is greater than 0.7V, the power supply module 110 outputs a power supply voltage to supply power to the drive module 120 and the indication module 130. When the detection voltage is in the range of 3V - the maximum output voltage of the power supply to be detected, the drive module 120 outputs a third pair of drive signals, causing the indication module 130 to generate a first indication signal accordingly, to indicate that the detection voltage is in the range of 3V - the maximum output voltage of the power supply to be detected; when the detection voltage is in the range of 2V - 3V, the drive module 120 outputs a second pair of drive signals, causing the indication module 130 to generate a second indication signal accordingly, to indicate that the detection voltage is in the range of 2V - 3V; when the detection voltage output by the power supply 20 to be detected is in the range of 1V - 2V, the drive module 120 outputs a first pair of drive signals, causing the indication module 130 to generate a third indication signal accordingly, to indicate that the detection voltage is in the range of 1V - 2V. When the indication module 130 does not generate any indication signal, it means that the detection voltage is less than the preset conduction voltage, that is, the detection voltage is less than 0.7V. It should be particularly noted that the voltage range settings in this embodiment are only for exemplary purposes, so as to more intuitively illustrate the technical solution of the present application, and do not constitute a limitation on the protection scope of the present application. The specific voltage range can be set according to actual needs or actual application scenarios, and the parameters in the circuit can be adjusted accordingly.

[0026] In some embodiments of the present application, a power supply module is provided, and its structural schematic diagram is as Figure 2 shown. The power supply module 110 includes a power supply 111, a switch unit 112, and a voltage stabilizing unit 113. The switch unit 112 is respectively connected to the power supply 111, the power supply 20 to be detected, and the voltage stabilizing unit 113, and the voltage stabilizing unit 113 is respectively connected to the drive module 120 and the indication module 130.

[0027] The power supply 111 is used to output a first voltage to the switch unit 112. The switch unit 112 is used to output the first voltage to the voltage stabilizing unit 113 when the detection voltage is greater than the conduction voltage. The voltage stabilizing unit 113 is used to convert the first voltage into a power supply voltage.

[0028] In some embodiments of the present application, a drive module is provided, and its structural schematic diagram is as Figure 3 shown. The drive module 120 includes a voltage dividing unit 121 and a comparison unit 122. The voltage dividing unit 121 is respectively connected to the power supply module 110 and the comparison unit 122, and the comparison unit 122 is respectively connected to the power supply 20 to be detected and the indication module 130.

[0029] The voltage dividing unit 121 is configured to output a first voltage signal and a second voltage signal respectively under the action of a power supply voltage. The comparison unit 122 outputs a first driving signal pair, a second driving signal pair or a third driving signal pair correspondingly in response to the first voltage signal, the second voltage signal and the detection voltage.

[0030] In the embodiment of the present application, the first driving signal pair includes a first driving signal and a second driving signal, the second driving signal pair includes a third driving signal and the second driving signal, and the third driving signal pair includes a third driving signal and a fourth driving signal.

[0031] When the detection voltage is in the first voltage range, the comparison unit 122 outputs the first driving signal and the second driving signal to the indication module 130 respectively; when the detection voltage is in the second voltage range, the comparison unit 122 outputs the third driving signal and the second driving signal to the indication module 130 respectively; when the detection voltage is in the third voltage range, the comparison unit 122 outputs the third driving signal and the fourth driving signal to the indication module 130 respectively.

[0032] Figure 4 It is a circuit structure diagram of a power detection circuit provided by an embodiment of the present application.

[0033] In this embodiment, the switch unit 112 includes a triode Q2, a triode Q3 and a resistor R10. The emitter of the triode Q2 is connected to the positive pole of the power supply 111, the base of the triode Q2 is connected to the first end of the resistor R10, and the collector of the triode Q2 is connected to the input end of the voltage stabilizing unit 113 (i.e., Figure 4 the input end LINE VOLTAGE of the voltage regulator U1 shown). The second end of the resistor R10 is connected to the collector of the triode Q3. The base of the triode Q3 is connected to the positive pole of the power supply 20 to be detected, and the emitter of the triode Q3 is grounded.

[0034] The voltage stabilizing unit 113 includes a voltage regulator U1 and a capacitor C1. The first end of the capacitor C1 is connected to the output end of the switch unit 112 (i.e., Figure 4 the collector of the triode Q2 shown) and the input end LINE VOLTAGE of the voltage regulator U1 respectively. The output end VREG of the voltage regulator U1 is connected to the input end of the driving module 120 (i.e., Figure 4 the first end of the resistor R1 shown, the positive pole of the electric energy of the comparator U2A and the positive pole of the electric energy of the comparator U2B) and the first input end of the indication module 130 (i.e., Figure 4 the first end of the resistor R5 shown) respectively. The grounding end COMMON of the voltage regulator U1 and the second end of the capacitor C1 are grounded.

[0035] The voltage dividing unit 121 includes a resistor R1, a resistor R2, and a resistor R3. The first end of the resistor R1 is connected to the output end of the power supply module 110 (i.e., Figure 4 the output end VREG of the voltage regulator U1 shown), the second end of the resistor R1 is respectively connected to the first end of the resistor R2 and the first input end of the comparison unit 122 (i.e., Figure 4 the non-inverting input end of the comparator U2A shown), the second end of the resistor R2 is respectively connected to the first end of the resistor R3 and the second input end of the comparison unit 122 (i.e., Figure 4 the non-inverting input end of the comparator U2B shown), and the second end of the resistor R3 is grounded.

[0036] The comparison unit 122 includes a comparator U2A, a comparator U2B, a control switch J1, and a resistor R7. The first end of the control switch J1 is connected to the positive pole of the power supply 20 to be detected. The second end of the control switch J1 is respectively connected to the first end of the resistor R1, the non-inverting input end of the comparator U2B, and the non-inverting input end of the comparator U2A. The non-inverting input end of the comparator U2A is connected to the first output end of the voltage dividing unit 121 (i.e., Figure 4 the second end of the resistor R1 shown), and the non-inverting input end of the comparator U2B is connected to the second output end of the voltage dividing unit 121 (i.e., Figure 4 the second end of the resistor R2 shown).

[0037] The output end of the comparator U2A is connected to the second input end of the indication module 130 (i.e., Figure 4 the cathode of the light emitting diode LED1 shown), the output end of the comparator U2B is connected to the third input end of the indication module 130 (i.e., Figure 4 the cathode of the light emitting diode LED2 shown), the positive pole of the power supply end of the comparator U2A is respectively connected to the output end of the power supply module 110 (i.e., Figure 4 the output end VREG of the voltage regulator U1 shown) and the positive pole of the power supply end of the comparator U2B. The negative pole of the power supply end of the comparator U2A and the negative pole of the power supply end of the comparator U2B are grounded.

[0038] The indication module 130 includes a resistor R4, a resistor R5, a resistor R6, a light emitting diode LED1, a light emitting diode LED2, and a light emitting diode LED3. The first end of the resistor R5 is connected to the output end of the power supply module 110 (i.e., Figure 4 the output end VREG of the voltage regulator U1 shown), the second end of the resistor R5 is connected to the anode of the light emitting diode LED1. The cathode of the light emitting diode LED1 is respectively connected to the first end of the resistor R6 and the first output end of the driving module 120 (i.e., Figure 4 the output end of the comparator U2A shown), and the second end of the resistor R6 is connected to the anode of the light emitting diode LED2.

[0039] The cathode of the light emitting diode LED2 is connected to the first end of the resistor R4 and the second output end of the driving module 120 (ie Figure 4 The output end of the comparator U2B is connected, the second end of the resistor R4 is connected to the anode of the light emitting diode LED3, and the cathode of the light emitting diode LED3 is grounded.

[0040] Specifically, when the control switch J1 is closed, the power detection of the power source 20 to be detected is started, and the comparator U2A and the comparator U2B constitute the voltage judgment of the power source 20 to be detected.

[0041] according to Figure 4 From the circuit structure shown, it is not difficult to obtain that the voltage received by the non-inverting input terminal of the comparator U2A is Vu1*(R2+R3) / (R1+R2+R3); the voltage received by the non-inverting input terminal of the comparator U2B is Vu1*R3 / (R1+R2+R3); wherein Vu1 is the supply voltage output by the voltage regulator U1. Therefore, it can be seen that the voltage received by the non-inverting input terminal of the comparator U2A is greater than the voltage received by the non-inverting input terminal of U2B.

[0042] When the voltage of the power supply 20 to be detected is greater than the conduction voltage of the transistor Q3, the transistor Q3 can be turned on. As an example but not a limitation, the conduction threshold of the transistor Q3 is 0.7V, that is, the preset conduction voltage is 0.7V. When the transistor Q3 is turned on, the transistor Q2 is turned on, and the power supply 111 supplies power to the regulator U1 through the transistor Q2, and the regulator U1 reduces the voltage to the preset power supply voltage to supply power to the comparator U2A and the comparator U2B.

[0043] As an example but not limitation, the supply voltage is 5V, the preset first voltage interval is 1V-2V, the preset second voltage interval is 2V-3V, and the preset third voltage interval is 3V-maximum output voltage of the power supply to be detected.

[0044] In the embodiment of the present application, the first indication signal, the second indication signal and the third indication signal are all optical signals.

[0045] When the detection voltage output by the power supply 20 to be detected is greater than or equal to 3V, the voltage at the in-phase input terminal of the comparator U2A is lower than the voltage at the inverting input terminal, so the output terminal of the comparator U2A outputs a low level (i.e., the first drive signal is a low-level voltage signal), and the light-emitting diode LED1 is turned on at this time, and the light-emitting diode LED1 generates a first indication signal, i.e., emits light. The voltage at the in-phase input terminal of the comparator U2B is lower than the voltage at the inverting input terminal, and the output terminal of the comparator U2B outputs a low level (i.e., the second drive signal is a low-level voltage signal), and the light-emitting diodes LED2 and LED3 are not turned on.

[0046] When the detected voltage is in the range of 2V - 3V, the voltage at the non-inverting input terminal of comparator U2 is higher than that at the inverting input terminal. The output terminal of comparator U2A outputs a high level (i.e., the third drive signal is a high-level voltage signal), and the light-emitting diode LED1 is not conducting. At this time, the voltage at the non-inverting input terminal of comparator U2B is lower than that at the inverting input terminal. Therefore, the output terminal of comparator U2B outputs a low level (i.e., the second drive signal), and the light-emitting diode LED2 conducts, generating a second indication signal, that is, emitting light, while the light-emitting diode LED3 is not conducting.

[0047] When the detected voltage is in the range of 1V - 2V, the voltage at the non-inverting input terminal of comparator U2A is higher than that at the inverting input terminal. The output terminal of comparator U2A outputs a high level (i.e., the third drive signal), and the light-emitting diode LED1 is not conducting. At this time, the voltage at the non-inverting input terminal of comparator U2B is lower than that at the inverting input terminal. Therefore, the output terminal of comparator U2B outputs a high level (i.e., the fourth drive signal is a high-level voltage signal), and the light-emitting diode LED2 is not conducting, while the light-emitting diode LED3 conducts, generating a third indication signal, that is, emitting light.

[0048] When the detected voltage is less than the conduction threshold of triode Q3 (under-voltage state), triode Q3 is turned off. At this time, the voltage regulator U1 loses power, and the light-emitting diodes LED1, LED2, and LED3 are all not conducting and are in the extinguished state.

[0049] In some embodiments, the light-emitting diodes LED1, LED2, and LED3 have different emission colors to better indicate different power states.

[0050] Different from the prior art, the embodiment of the present utility model provides a drive module and an indication module. The drive module outputs corresponding drive signals according to the detected voltage of the power supply to be detected, and the indication module generates corresponding indication signals according to different drive signals to prompt the voltage range of the detected voltage, thereby realizing voltage detection, which can simplify the structure of the power detection circuit, improve the stability of the circuit, and reduce costs.

[0051] Based on any of the power detection circuits provided in the above embodiments, the present application also provides an energy storage power supply, which includes the power detection circuit described in any of the above embodiments.

[0052] It should be noted that the description and drawings of the present utility model provide preferred embodiments of the present utility model. However, the present utility model 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 to the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Moreover, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the description of the present utility model. Further, for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A power detection circuit, characterized in that, Including: A power supply module, a driving module, and an indicating module. The power supply module is respectively connected to the power supply to be detected, the driving module, and the indicating module. The driving module is respectively connected to the power supply to be detected and the indicating module. The power supply module is configured to output a supply voltage when the detection voltage output by the power supply to be detected is greater than a preset conduction voltage. The driving module is configured to output a first driving signal pair, a second driving signal pair, or a third driving signal pair correspondingly in response to the detection voltage when receiving the supply voltage. The indicating module is configured to generate a first indication signal, a second indication signal, or a third indication signal correspondingly in response to the first driving signal pair, the second driving signal pair, or the third driving signal pair under the action of the supply voltage. The first indication signal is used to indicate that the detection voltage is within a preset first voltage range. The second indication signal is used to indicate that the detection voltage is within a preset second voltage range. The third indication signal is used to indicate that the detection voltage is within a preset third voltage range.

2. The circuit according to claim 1, wherein The driving module includes a voltage dividing unit and a comparison unit. The voltage dividing unit is respectively connected to the power supply module and the comparison unit. The comparison unit is respectively connected to the power supply to be detected and the indicating module. The voltage dividing unit is configured to output a first voltage signal and a second voltage signal respectively under the action of the supply voltage. The comparison unit outputs the first driving signal pair, the second driving signal pair, or the third driving signal pair correspondingly in response to the first voltage signal, the second voltage signal, and the detection voltage.

3. The circuit according to claim 2, wherein The first driving signal pair includes a first driving signal and a second driving signal. The second driving signal pair includes a third driving signal and the second driving signal. The third driving signal pair includes the third driving signal and a fourth driving signal. When the detection voltage is within the first voltage range, the comparison unit outputs the first driving signal and the second driving signal to the indicating module respectively. When the detection voltage is within the second voltage range, the comparison unit outputs the third driving signal and the second driving signal to the indicating module respectively. When the detection voltage is within the third voltage range, the comparison unit outputs the third driving signal and the fourth driving signal to the indicating module respectively.

4. The circuit according to claim 1, wherein The power supply module includes a power supply, a switching unit, and a voltage stabilizing unit. The switching unit is respectively connected to the power supply, the power supply to be detected, and the voltage stabilizing unit. The voltage stabilizing unit is respectively connected to the driving module and the indicating module. The power supply is configured to output a first voltage to the switching unit. The switching unit is configured to output the first voltage to the voltage stabilizing unit when the detection voltage is greater than the conduction voltage. The voltage stabilizing unit is configured to convert the first voltage into the supply voltage.

5. The circuit according to claim 2, wherein The comparison unit includes a comparator U2A, a comparator U2B, a control switch J1, and a resistor R7. The first end of the control switch J1 is connected to the positive electrode of the power supply to be detected. The second end of the control switch J1 is respectively connected to the first end of the resistor R1, the inverting input terminal of the comparator U2B, and the inverting input terminal of the comparator U2A. The non-inverting input terminal of the comparator U2A is connected to the first output terminal of the voltage dividing unit. The non-inverting input terminal of the comparator U2B is connected to the second output terminal of the voltage dividing unit; The output terminal of the comparator U2A is connected to the second input terminal of the indicating module. The output terminal of the comparator U2B is connected to the third input terminal of the indicating module. The positive electrode of the power supply end of the comparator U2A is respectively connected to the output terminal of the power supply module and the positive electrode of the power supply end of the comparator U2B. The negative electrode of the power supply end of the comparator U2A and the negative electrode of the power supply end of the comparator U2B are grounded.

6. The circuit according to claim 2, wherein The voltage dividing unit includes a resistor R1, a resistor R2, and a resistor R3. The first end of the resistor R1 is connected to the output terminal of the power supply module. The second end of the resistor R1 is respectively connected to the first end of the resistor R2 and the first input terminal of the comparison unit. The second end of the resistor R2 is respectively connected to the first end of the resistor R3 and the second input terminal of the comparison unit. The second end of the resistor R3 is grounded.

7. The circuit according to claim 4, wherein The switch unit includes a triode Q2, a triode Q3, and a resistor R10. The emitter of the triode Q2 is connected to the positive electrode of the power supply. The base of the triode Q2 is connected to the first end of the resistor R10. The collector of the triode Q2 is connected to the input terminal of the voltage stabilizing unit. The second end of the resistor R10 is connected to the collector of the triode Q3. The base of the triode Q3 is connected to the positive electrode of the power supply to be detected. The emitter of the triode Q3 is grounded.

8. The circuit according to claim 4, characterized in that, The voltage stabilizing unit includes a voltage regulator U1 and a capacitor C1. The first end of the capacitor C1 is respectively connected to the output terminal of the switch unit and the input terminal of the voltage regulator U1. The output terminal of the voltage regulator U1 is respectively connected to the input terminal of the driving module and the first input terminal of the indicating module. The grounding terminal of the voltage regulator U1 and the second end of the capacitor C1 are grounded.

9. The circuit according to any one of claims 1-8, characterized in that, The indicating module includes a resistor R4, a resistor R5, a resistor R6, a light emitting diode LED1, a light emitting diode LED2, and a light emitting diode LED3. The first end of the resistor R5 is connected to the output terminal of the power supply module. The second end of the resistor R5 is connected to the anode of the light emitting diode LED1. The cathode of the light emitting diode LED1 is respectively connected to the first end of the resistor R6 and the first output terminal of the driving module. The second end of the resistor R6 is connected to the anode of the light emitting diode LED2. The cathode of the light emitting diode LED2 is respectively connected to the first end of the resistor R4 and the second output terminal of the driving module. The second end of the resistor R4 is connected to the anode of the light emitting diode LED3. The cathode of the light emitting diode LED3 is grounded.

10. A energy storage power supply, characterized in that, Comprising: The power quantity detection circuit according to any one of claims 1-9.

Images