CN113141050A - Electronic device - Google Patents
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- CN113141050A CN113141050A CN202010062436.9A CN202010062436A CN113141050A CN 113141050 A CN113141050 A CN 113141050A CN 202010062436 A CN202010062436 A CN 202010062436A CN 113141050 A CN113141050 A CN 113141050A
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- 238000007600 charging Methods 0.000 claims abstract description 101
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 230000002159 abnormal effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 239000000306 component Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 9
- 239000000446 fuel Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
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Abstract
The application discloses electronic equipment belongs to the technical field of charging. The electronic device includes a processor, a charge controller, and a battery. The processor is connected with the battery and is used for measuring the charging parameters of the battery and sending the charging parameters to the charging controller, wherein the charging parameters comprise charging current and/or battery voltage; the charging controller is connected with the processor, and is used for receiving the charging parameter and outputting control information to the power adapter according to the charging parameter, wherein the control information is used for instructing the power adapter to adjust the output current and/or voltage according to the control information. The technical scheme provided by the embodiment of the application can realize the indication of the power adapter with lower hardware cost, so that the power adapter adjusts the current and/or voltage output by the power adapter according to the indication.
Description
Technical Field
The present application relates to the field of charging technologies, and in particular, to an electronic device.
Background
Currently, with the development of scientific technology, electronic devices such as smart phones are more and more common in people's daily life. The electronic equipment is provided with a battery, and under a normal condition, the battery in the electronic equipment can be charged through the power adapter to provide electric energy required by normal operation for the electronic equipment.
The process of charging the battery may include a plurality of charging phases, for example, the plurality of charging phases may include a constant current charging phase, a constant voltage charging phase, and the like, in each of which the electronic device needs to output control information to the power adapter to instruct the power adapter to adjust the current and/or voltage output by itself using the control information. Currently, how to implement the indication of the power adapter with a low hardware cost is a critical issue to enable the power adapter to adjust the current and/or voltage output by itself according to the indication.
Disclosure of Invention
In view of this, it is necessary to provide an electronic device in which the power adapter adjusts the current and/or voltage output by the power adapter itself in accordance with the instruction in order to realize the instruction to the power adapter at a low hardware cost.
An embodiment of the application provides an electronic device, which includes a processor, a charge controller and a battery.
The processor is connected with the battery and is used for measuring the charging parameters of the battery and sending the charging parameters to the charging controller, wherein the charging parameters comprise charging current and/or battery voltage; the charging controller is connected with the processor, and is used for receiving the charging parameter and outputting control information to the power adapter according to the charging parameter, wherein the control information is used for instructing the power adapter to adjust the output current and/or voltage according to the control information.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
by measuring a charging parameter of a battery by a processor of the electronic device, wherein the charging parameter includes a charging current and/or a battery voltage, and outputting control information to a power adapter by a charging controller according to the charging parameter measured by the processor, the control information being used for instructing the power adapter to adjust the output current and/or voltage according to the control information, since the processor and the charging controller are both intrinsic and indispensable components in the electronic device, wherein the processor is used for providing processing capability for the electronic device, and the charging controller is used for controlling a charging process of the battery, in the embodiment of the present application, the electronic device can realize the instruction to the power adapter by using only the intrinsic and indispensable components, so that the power adapter adjusts the current and/or voltage output by itself according to the instruction, compared with the mode that an additional fuel gauge chip is needed in the prior art, the electronic device provided by the embodiment of the application has fewer components, so that the hardware cost is lower.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another electronic device provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of another electronic device provided in an embodiment of the present application;
fig. 4 is a schematic diagram of an internal structure of a battery according to an embodiment of the present disclosure;
fig. 5 is a schematic view of an internal structure of another battery provided in an embodiment of the present application;
fig. 6 is a schematic view of an internal structure of another battery according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of another electronic device provided in the embodiment of the present application;
fig. 8 is a schematic structural diagram of another electronic device according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Generally, the electronic device needs to output control information to the power adapter at each charging stage of the battery charging so as to instruct the power adapter to adjust the current and/or voltage output by itself by using the control information. In the related art, an electronic device may be provided with a fuel gauge chip, the fuel gauge chip being connected to the battery and configured to measure a charging current and/or a battery voltage of the battery, and the electronic device may output the control information to the power adapter according to the charging current and/or the battery voltage measured by the fuel gauge chip, so as to indicate a current and/or a voltage output by the power adapter.
However, the additional arrangement of the fuel gauge chip in the electronic device may bring high hardware cost. Based on this, the embodiment of the application provides an electronic device, and the electronic device can realize the control of the electronic device on the power adapter with lower hardware cost.
Please refer to fig. 1, which illustrates a schematic diagram of an electronic device according to an embodiment of the present disclosure, where the electronic device in the embodiment of the present disclosure may be an electronic device with a charging function, such as a mobile phone, a tablet computer, a wearable device, and an electronic book reader, which needs to charge a battery.
As shown in fig. 1, the electronic device may include a processor 101, a charge controller 102, and a battery D, the processor 101 may be connected to the battery D, and the charge controller 102 may be connected to the processor 101.
The processor 101 is configured to measure a charging parameter of the battery D, and send the charging parameter to the charging controller 102, where the charging parameter includes a charging current and/or a battery voltage. The charging controller 102 is configured to receive a charging parameter and output control information to the power adapter according to the charging parameter, where the control information is used to instruct the power adapter to adjust the output current and/or voltage according to the control information.
In this embodiment, the processor 101 may be an application processor for providing processing capability for the operation of an operating system and application programs in the electronic device. Optionally, the processor 101 may be integrated with an analog-to-digital conversion circuit (ADC), and the ADC may measure a charging parameter of the battery D. In practical application, the analog-to-digital conversion circuit can sample the charging current and/or the battery voltage of the battery D and acquire the charging current and/or the battery voltage of the battery D according to the sampling result.
The charge controller 102 may communicate with the power adapter during charging of the battery D, and the charge controller 102 may output the above-described control information to the power adapter based on the communication with the power adapter.
The battery D may generally include a battery core, a battery protection circuit, a battery pin, and a casing, where the battery core is a core component of the battery and is used for storing and outputting electric energy, which determines performance of the battery, the battery protection circuit is used for disconnecting a circuit between the battery core and an external component of the battery under an abnormal condition of the battery (for example, under a short circuit condition of the battery), so as to protect the battery core from being damaged, the battery pin refers to a positive and negative output pin of the battery, the external component of the battery may be connected to the battery through the battery pin to receive the electric energy output by the battery through the battery pin, and the battery core and the battery protection circuit of the battery may be disposed in the casing of the battery.
In the embodiment of the present application, the battery D may include a single battery cell or a plurality of battery cells, and in the case that the battery D includes a plurality of battery cells, the plurality of battery cells may be connected to each other in a series connection manner, or may be connected to each other in a parallel connection manner.
The electronic device provided by the embodiment of the present application may utilize the processor to measure a charging parameter of the battery, where the charging parameter includes a charging current and/or a battery voltage, and may utilize the charging controller to output control information to the power adapter according to the charging parameter measured by the processor, where the control information is used to instruct the power adapter to adjust the output current and/or voltage according to the control information, since the processor and the charging controller are both intrinsic and indispensable components in the electronic device, where the processor is used to provide processing capability for the electronic device, and the charging controller is used to control a charging process of the battery, in this embodiment of the present application, the electronic device only needs to use its intrinsic and indispensable components to achieve an instruction to the power adapter, so that the power adapter adjusts the current and/or voltage output by itself according to the instruction, compared with the mode that an additional fuel gauge chip is needed in the prior art, the electronic device provided by the embodiment of the application has fewer components, so that the hardware cost is lower.
In addition, in the process of charging the battery, the electronic device provided in the embodiment of the present application only needs to communicate between the processor and the charging controller, so that the process is simple, and the complexity of the communication protocol between the related components is low, whereas if another component is additionally provided in the electronic device, the processor and the charging controller need to communicate with each other and the additionally provided component, respectively, so that the process is complex, and the complexity of the communication protocol between the related components is high. In other words, according to the electronic device provided by the embodiment of the application, in the process of charging the battery, the flow of communication between the components is simple, and the complexity of the communication protocol between the components is low.
Optionally, in an embodiment of the application, the processor 101 may calculate the electric quantity of the battery D according to the charging current and the battery voltage, and then, the processor 101 may output the calculated electric quantity, so that the electronic device displays the electric quantity of the battery D, for example, the electronic device may display the electric quantity of the battery D through a display screen. Thus, the user can understand the charging process of the battery D.
Optionally, in an embodiment of the present application, the processor 101 may obtain an operating state of the charging controller 102, for example, the processor 101 may periodically receive operating state report information sent by the charging controller 102, where the operating state report information is used to indicate the operating state of the charging controller 102.
The working state of the charge controller 102 may include a normal state and an abnormal state, in a normal case, if all the parameters of the charge controller 102 used for characterizing the working state are within a normal range, the charge controller 102 is in the normal state, and if one or more parameters of the charge controller 102 used for characterizing the working state are not within the normal range, the charge controller 102 is in the abnormal state. For example, if the temperature value of charge controller 102 is not within the normal range, that is, if the temperature of charge controller 102 is too high, charge controller 102 is in an abnormal state, and for example, if the current value inside charge controller 102 is not within the normal range, that is, if the current value inside charge controller 102 is too high, charge controller 102 is in an abnormal state.
When the processor 101 determines that the operating state of the charge controller 102 is an abnormal state, the processor 101 may perform shutdown processing on the charge controller 102, and damage to the battery D due to abnormality of the charge controller 102 may be avoided by performing shutdown processing on the charge controller 102 when the charge controller 102 is in the abnormal state.
Referring to fig. 2, in an alternative embodiment of the present application, the electronic device described above may further include a measuring resistor 103, wherein the measuring resistor 103 is connected in series with the battery D, and the processor 101 is connected in parallel with the measuring resistor 103. Optionally, in the case that the processor 101 is integrated with an analog-to-digital conversion circuit, what the processor 101 and the measuring resistor 103 refer to in parallel may be: an analog-to-digital conversion circuit integrated in the processor 101 is connected in parallel with the measuring resistor 103.
Since the processor 101 is connected in parallel with the measuring resistor 103, the processor 101 can measure the voltage across the measuring resistor 103, and after measuring the voltage, the processor 101 can calculate the charging current according to the measured voltage and the resistance value of the measuring resistor 103. Alternatively, the processor 101 may calculate the charging current using ohm's law.
Optionally, in a case where the processor 101 is integrated with an analog-to-digital conversion circuit, the analog-to-digital conversion circuit may measure a voltage across the measurement resistor 103, and after the voltage is measured by the analog-to-digital conversion circuit, the processing core of the processor 101 may calculate a charging current according to the voltage measured by the analog-to-digital conversion circuit and a resistance value of the measurement resistor, where english of the processing core is core, which is the most important component of the processor, and all calculation and processing functions of the processor are implemented by the processing core.
Referring to fig. 3, in an embodiment of the present application, the processor 101 may be connected in parallel with the battery cell of the battery D. Optionally, in a case that the battery D includes a plurality of battery cells, the processor 101 may be connected in parallel with the plurality of battery cells, it should be noted that, when the plurality of battery cells are connected to each other in parallel, the processor 101 may be connected in parallel with each of the plurality of battery cells, when the plurality of battery cells are connected to each other in series, the processor 101 may be connected in parallel with the plurality of battery cells in series, and in this parallel relationship, the plurality of battery cells in series may be connected in parallel with the processor 101 as a whole as a circuit structure. Optionally, when the processor 101 is integrated with an analog-to-digital conversion circuit, what the processor 101 and the battery cell of the battery D are connected in parallel may be: the analog-to-digital conversion circuit integrated in the processor 101 is connected in parallel with the battery cell of the battery D.
Since the processor 101 is connected in parallel with the cells of the battery D, the processor 101 may measure voltages across the cells, so that the voltages across the cells are obtained through the measurement of the processor 101, and the measured voltages across the cells may be used as the battery voltage by the processor 101. Alternatively, in a case where the processor 101 is integrated with an analog-to-digital conversion circuit, the analog-to-digital conversion circuit in the processor 101 may measure the voltage across the battery cell of the battery D.
In an alternative embodiment of the present application, the line c1 between the processor 101 and the positive pole of the battery cell prohibits the current from passing through, and at the same time, the line c2 between the processor 101 and the negative pole of the battery cell prohibits the current from passing through, in other words, the lines between the processor 101 and the positive pole of the battery cell and the lines between the processor 101 and the negative pole of the battery cell are not used for outputting the electric energy from the battery cell.
Referring to fig. 4, which is a schematic diagram of an internal structure of a battery D, as shown in fig. 4, the battery D may include a battery cell x, a VBAT + pin, a GND pin, and a battery protection circuit B, where the VBAT + pin is a positive electrode pin of the battery D, the GND pin is a ground pin of the battery D, a positive electrode of the battery cell x is connected to the VBAT + pin, a negative electrode of the battery cell x is connected to the GND pin, and the battery protection circuit B is connected to a line between the battery cell x and the GND pin, and the battery protection circuit B may cut off the line between the battery cell x and the GND pin when the battery D is in an abnormal state (e.g., a short circuit state), so as to protect the battery cell x from being damaged.
In general, the electronic device may use the voltage between the VBAT + pin and the GND pin as the battery voltage of the battery D. However, since the current passes through the line between the battery cell x and the GND pin and the current also passes through the line between the battery cell x and the VBAT + pin, the voltage drop is generated on the voltage output by the battery cell x by the resistance of the line between the battery cell x and the GND pin and the line between the battery cell x and the VBAT + pin, and the voltage between the VBAT + pin and the GND pin is not equal to the actual voltage output by the battery cell x due to the voltage drop, so that the accuracy of taking the voltage between the VBAT + pin and the GND pin as the battery voltage of the battery D is not high.
In this embodiment, the processor 101 may be connected in parallel with the battery cell of the battery D, and the line c1 between the processor 101 and the positive electrode of the battery cell and the line c2 between the processor 101 and the negative electrode of the battery cell prohibit current from passing through, so that the line c1 between the processor 101 and the positive electrode of the battery cell and the line c2 between the processor 101 and the negative electrode of the battery cell do not generate a voltage drop on the voltage output by the battery cell of the battery D, and therefore, the voltage across the battery cell measured by the processor 101 is the voltage actually output by the battery cell, and therefore, the accuracy of the battery voltage measured by the processor 101 is high.
Referring to fig. 5, a schematic diagram of the processor 101 connected in parallel with the battery cell x of the battery D is shown.
In an alternative embodiment of the present application, the above-mentioned line c1 between the processor 101 and the positive pole of the battery cell and/or the line c2 between the processor 101 and the negative pole of the battery cell may be connected with the battery protection circuit B. Referring to fig. 6, optionally, a line c2 between the negative electrode of the battery cell x and the processor 101 may be connected to the battery protection circuit B. In the embodiment of the present application, the battery protection circuit B may cut off a line connected to the battery protection circuit B when the battery D is in an abnormal state (for example, a short-circuit state), so as to protect the battery cell x from being damaged. For example, the battery protection circuit B may cut off the line c2 between the processor 101 and the negative electrode of the battery cell when the battery D is in an abnormal state.
In an alternative embodiment of the present application, the electronic device may further include a power interface for supplying the power adapter to charge the battery D. The power interface may be a parallel port or a serial port for transmitting electric energy, for example, the power interface may be a USB 2.0 interface, a Micro USB interface, a lightning interface, or a USB TYPE-C interface. It is noted that in some embodiments of the present application, the power interface may be used to transmit data in addition to power.
Referring to fig. 7, optionally, the electronic device may include a power interface 104, where the power interface 104 includes a data signal pin, the charging controller 102 is connected to the data signal pin, and the charging controller 102 may send the above control information to the power adapter through the data signal pin.
Taking the power interface 104 as a USB interface as an example, the power interface 104 may include data signal pins D + and D-, where the data signal pins D + and D-are used to transmit differential data signals, the charging controller 102 may be connected to the data signal pins D + and D-through a USB switch, and the charging controller 102 may send the control information to the power adapter in the form of differential signals through the data signal pins D + and D-.
With continued reference to fig. 7, the power interface 104 further includes an electrical signal pin, wherein the electrical signal pin is connected to the battery D, and the charging controller 102 can control the connection and disconnection of the circuit between the electrical signal pin and the battery D. For example, the charge controller 102 may control the electrical signal pin to be in line communication with the battery D when the charging starts, for another example, the charge controller 102 may control the electrical signal pin to be in line disconnection with the battery D when the charging ends, for another example, the charge controller 102 may control the electrical signal pin to be in line disconnection with the battery D when the temperature of the battery D is higher than a preset temperature threshold.
Taking the power interface 104 as a USB interface as an example, the power interface 104 may include an electrical signal pin VBUS, the electrical signal pin VBUS is connected to the battery D, and the charging controller 102 may control the disconnection and connection of a line between the electrical signal pin VBUS and the battery D.
It should be noted that the circuit structures shown in fig. 1 to 7 may be combined arbitrarily to form an electronic device protected by the embodiment of the present application.
Referring to fig. 8, a schematic diagram of an exemplary electronic device formed by combining some of the circuit structures of fig. 1-7 is shown.
As shown in fig. 8, the electronic device may include a battery D, a processor 101, a charge controller 102, a measuring resistor 103, and a power interface 104.
An analog-to-digital conversion circuit ADC is integrated in the processor 101, wherein the analog-to-digital conversion circuit ADC is connected in parallel with the measuring resistor 103, and the analog-to-digital conversion circuit ADC is connected with the positive electrode and the negative electrode of the battery cell of the battery D respectively. The processor 101 is configured to measure a charging parameter of the battery D, wherein the charging parameter includes a charging current and/or a battery voltage.
The charge controller 102 and the processor 101 are connected through a clock signal interface AP _ CLK of the processor 101 and a DATA signal interface AP _ DATA of the processor 101. The processor 101 may send the charging parameters to the charging controller 102 through a connection with the charging controller.
The power interface 104 may be a USB interface, and the power interface 104 may include an electrical signal pin VBUS and data signal pins D + and D-.
The electrical signal pin VBUS is connected in series with the measuring resistor 103 and the battery D, the charging controller 102 is connected to a switch G1 disposed on a line between the electrical signal pin VBUS and the battery D, and the charging controller 102 is configured to control the switch G1 to be turned off and turned on.
The data signal pins D + and D-are connected to the charge controller 102 through a USB switch, wherein a line connected to the data signal pin D-is a data line DM, and a line connected to the data signal pin D + is a data line DP, the charge controller 102 may generate control information according to the charging parameter sent by the processor 101, and then the charge controller 102 may send the control information to the power adapter through the data signal pins D + and D-.
An embodiment of the present application further provides a charging system, which includes the electronic device and the power adapter described in any of the above embodiments.
In this application, unless expressly stated or limited otherwise, the terms "connected" and "connecting" are used broadly and encompass, for example, electrical and communication connections; can be directly connected or indirectly connected. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, "and/or" is used to describe the association relationship of the associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate that three cases, i.e., a exists alone, B exists alone, and a and B exist simultaneously. The symbol "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. An electronic device, comprising a processor, a charge controller, and a battery;
the processor is connected with the battery and used for measuring the charging parameters of the battery and sending the charging parameters to the charging controller, wherein the charging parameters comprise charging current and/or battery voltage;
the charging controller is connected with the processor, and is used for receiving the charging parameters and outputting control information to the power adapter according to the charging parameters, wherein the control information is used for indicating the power adapter to adjust the output current and/or voltage according to the control information.
2. The electronic device of claim 1, wherein the processor has integrated therein an analog-to-digital conversion circuit;
the analog-to-digital conversion circuit is used for measuring the charging parameters of the battery.
3. The electronic device of claim 1 or 2, further comprising a measuring resistor in series with the battery;
the processor is connected with the measuring resistor in parallel and used for measuring the voltage at two ends of the measuring resistor and calculating the charging current according to the measured voltage and the resistance value of the measuring resistor.
4. The electronic device of claim 1 or 2, wherein the processor is connected in parallel with a cell of the battery, and is configured to measure a voltage across the cell and use the measured voltage as the battery voltage.
5. The electronic device of claim 4, wherein a line between the processor and the positive pole of the cell and a line between the processor and the negative pole of the cell both inhibit current flow.
6. The electronic device of claim 4, wherein a line between the processor and the positive electrode of the battery cell and/or a line between the processor and the negative electrode of the battery cell is connected to a battery protection circuit, and the battery protection circuit is configured to disconnect the line connected to the battery protection circuit when the battery is in an abnormal state.
7. The electronic device of claim 1, wherein the processor is further configured to calculate an amount of power of the battery according to the charging current and the battery voltage, and the processor is further configured to output the amount of power, and the amount of power is used for presentation by the electronic device.
8. The electronic device of claim 1, further comprising a power interface, wherein the power interface is configured to allow the power adapter to charge the battery, the power interface comprises a data signal pin, and the charge controller is connected to the data signal pin;
the charging controller is used for sending the control information to the power adapter through the data signal pin.
9. The electronic device of claim 8, wherein the power interface further comprises an electrical signal pin, the electrical signal pin being connected to the battery;
the charging controller is also used for controlling the disconnection and the communication of a circuit between the electric signal pin and the battery.
10. The electronic device of claim 1, wherein the processor is further configured to perform a shutdown process on the charge controller when the charge controller is in an abnormal state.
11. The electronic device of claim 1, further comprising a measuring resistor in series with the battery and a power interface for the power adapter to charge the battery;
the processor is integrated with an analog-to-digital conversion circuit, the analog-to-digital conversion circuit is respectively connected with the measuring resistor and the battery core of the battery in parallel, the analog-to-digital conversion circuit is used for measuring the voltage at two ends of the measuring resistor and calculating the charging current according to the measured voltage and the resistance value of the measuring resistor, and the analog-to-digital conversion circuit is also used for measuring the voltage at two ends of the battery core and taking the measured voltage as the voltage of the battery;
the power interface comprises a data signal pin and an electric signal pin, the data signal pin is connected with the charging controller, the electric signal pin is connected with the battery, the charging controller is used for sending the control information to the power adapter through the data signal pin, and the charging controller is also used for controlling the connection and disconnection of a circuit between the electric signal pin and the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010062436.9A CN113141050A (en) | 2020-01-19 | 2020-01-19 | Electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010062436.9A CN113141050A (en) | 2020-01-19 | 2020-01-19 | Electronic device |
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| CN113141050A true CN113141050A (en) | 2021-07-20 |
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| CN202010062436.9A Pending CN113141050A (en) | 2020-01-19 | 2020-01-19 | Electronic device |
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Cited By (1)
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| CN113866660A (en) * | 2021-09-07 | 2021-12-31 | 国网湖南省电力有限公司 | Monitoring system and monitoring equipment for back-up power supply of breaker on deep fusion column |
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