CN110138056B - Emergency power supply protection method and device - Google Patents
Emergency power supply protection method and device Download PDFInfo
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- CN110138056B CN110138056B CN201910567130.6A CN201910567130A CN110138056B CN 110138056 B CN110138056 B CN 110138056B CN 201910567130 A CN201910567130 A CN 201910567130A CN 110138056 B CN110138056 B CN 110138056B
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- emergency power
- power supply
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides an emergency power supply protection method and device, wherein the emergency power supply protection method comprises the following steps: the charging circuit is communicated with the emergency power supply and charges the emergency power supply for a first preset time; detecting the voltage of the emergency power supply, and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point or not; when the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point, a charging loop of the emergency power supply is disconnected; judging whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset duration or not; when the charging times do not reach the first preset times or the total charging time does not reach the third preset time, after the second preset time, the steps are circulated; and when the charging times are more than the preset times, determining that the emergency power supply is damaged and disconnecting the charging loop. The invention can restore the undervoltage emergency power supply to a normal state, reduce the condition that the undervoltage emergency power supply is mistakenly judged as a damaged battery, and increase the utilization rate of the emergency power supply.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an emergency power supply protection method and device.
Background
The existing emergency equipment is generally provided with an emergency power supply which is easy to cause problems, and the emergency equipment is provided with a protective measure related to a battery so as to avoid battery accidents caused by improper operation.
The existing battery protection measures comprise battery damage protection, namely that the voltage of a battery is detected when emergency equipment is connected with the battery to work, and if the detected voltage is lower than the usable voltage value of the battery, the battery is disconnected permanently. However, when the voltage of the battery is less than the usable voltage value of the battery, the battery may be in an undervoltage state and not damaged, and therefore it is determined that the use rate of the emergency power supply is greatly reduced due to the damaged battery.
Disclosure of Invention
In view of the above problems, the present invention provides an emergency power protection method, an emergency power protection device, an emergency lighting device, and a computer storage medium, so as to restore the emergency power in the undervoltage state to the normal state, reduce the situation that the emergency power in the undervoltage state is mistakenly judged as a damaged battery, and increase the utilization rate of the emergency power.
In order to achieve the purpose, the invention adopts the following technical scheme:
an emergency power supply protection method, comprising:
the charging circuit is communicated with an emergency power supply, and the emergency power supply is charged for a first preset time;
detecting the voltage of the emergency power supply, and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point or not;
when the voltage of the emergency power supply is smaller than the first preset low-voltage cut-off point, a charging loop of the emergency power supply is disconnected;
judging whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset duration or not;
when the charging times do not reach the first preset times or the total charging time does not reach the third preset time, after the second preset time, the steps are circulated;
and when the charging times are more than the preset times, determining that the emergency power supply is damaged and disconnecting the charging loop.
Preferably, in the emergency power protection method, the emergency power supply includes a rechargeable battery.
Preferably, in the emergency power protection method, the second preset duration is longer than the first preset duration, and the third preset duration is longer than the second preset duration.
Preferably, in the emergency power protection method, the first preset time period is 2 seconds, and the second preset time period is 28 seconds.
Preferably, in the emergency power protection method, the first preset number of times is 240 times, and the third preset duration is 2 hours.
Preferably, the emergency power protection method further includes:
when the voltage of the emergency power supply is larger than a first preset low-voltage cut-off point, the charging loop of the emergency power supply is kept connected, and the normal charging mode is switched.
Preferably, the emergency power protection method further includes:
when the emergency power supply is used for discharging, detecting the voltage of the emergency power supply and the voltage of a load according to a preset time interval;
judging whether the voltage of the emergency power supply is continuously greater than a second preset low-voltage cut-off point within a second preset number of times;
and when the voltage of the emergency power supply is continuously greater than the second preset low-voltage cut-off point within the preset times, determining that the voltage is under-voltage output and cutting off the circuit from the emergency power supply to the load.
Preferably, in the emergency power protection method, the preset time interval is 0.1 second, and the second preset number of times is 10 times.
The invention also provides an emergency power supply protection device, comprising:
the charging loop communication module is used for communicating a charging loop of an emergency power supply and charging the emergency power supply for a first preset time;
the battery voltage judging module is used for detecting the voltage of the emergency power supply and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point or not;
the charging loop disconnection module is used for disconnecting the charging loop of the emergency power supply when the voltage of the emergency power supply is smaller than the first preset low-voltage cut-off point;
the charging frequency judging module is used for judging whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset duration or not;
the charging circulation module is used for circularly operating the modules after a second preset time length when the charging times do not reach a first preset time or the total charging time does not reach a third preset time length;
and the battery damage determining module is used for determining that the emergency power supply is damaged and disconnecting the charging loop when the charging times are greater than the preset times.
Preferably, the emergency power protection device further includes:
and the normal charging switching module is used for maintaining the communication of the charging loop of the emergency power supply when the voltage of the emergency power supply is greater than a first preset low-voltage cut-off point, and switching to a normal charging mode.
The invention provides an emergency power supply protection method, which comprises the following steps: the charging circuit is communicated with an emergency power supply, and the emergency power supply is charged for a first preset time; detecting the voltage of the emergency power supply, and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point or not; when the voltage of the emergency power supply is smaller than the first preset low-voltage cut-off point, a charging loop of the emergency power supply is disconnected; judging whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset duration or not; when the charging times do not reach the first preset times or the total charging time does not reach the third preset time, after the second preset time, the steps are circulated; and when the charging times are more than the preset times, determining that the emergency power supply is damaged and disconnecting the charging loop. The emergency power supply protection method can restore the emergency power supply in the undervoltage state to the normal state, reduce the condition that the emergency power supply in the undervoltage state is mistakenly judged as a damaged battery, and increase the utilization rate of the emergency power supply.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 is a flowchart of an emergency power protection method according to embodiment 1 of the present invention;
fig. 2 is a flowchart of an emergency power protection method according to embodiment 2 of the present invention;
fig. 3 is a flowchart of an emergency power protection method according to embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of an emergency power protection device provided in embodiment 4 of the present invention;
fig. 5 is a schematic structural diagram of another emergency power protection device provided in embodiment 4 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Fig. 1 is a flowchart of an emergency power protection method provided in embodiment 1 of the present invention, where the method includes the following steps:
step S11: and the charging loop is communicated with the emergency power supply and is used for charging the emergency power supply for a first preset time.
In the embodiment of the invention, the emergency power supply in the emergency equipment is excessive in working times, the emergency power supply after being discharged for many times can enter an undervoltage or damaged state, and the voltage of the battery can not rise when the battery is possibly charged in the subsequent charging process, wherein the emergency power supply comprises a rechargeable battery. Therefore, the charging power supply is connected to the emergency equipment, and after the emergency power supply is activated, the charging loop of the emergency power supply can be communicated before the emergency power supply is normal, the emergency power supply is charged for a first preset time, and the emergency power supply is also subjected to a transient charging test. Wherein, the charging time of this first predetermined duration is less than normal charging time far away to avoid under-voltage or the emergency power supply of damage state to take place the charging accident, wherein, this first predetermined duration's charging time can set up to 2 seconds, can break off the charging circuit after 2 seconds charge.
In the embodiment of the present invention, the process of connecting the battery charging loop for charging for a preset time period and then disconnecting the charging loop may be repeated for multiple times until the battery in the undervoltage state returns to normal, wherein the process of repeating for multiple times and charging for a short time may be implemented in the emergency device by using an algorithm or an application program, for example, the application program may be set in the emergency device, and the connection and disconnection of the charging loop is controlled by using the application program until it is determined that the battery returns to normal or the battery is damaged.
Step S12: and detecting the voltage of the emergency power supply, and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point.
In the embodiment of the invention, after the emergency power supply is charged for the first preset time, the voltage of the emergency power supply after the short charging can be detected, and the voltage of the emergency power supply after the short charging is compared with the preset cut-off voltage to judge whether the voltage of the emergency power supply is smaller than the preset cut-off voltage or judge whether the voltage of the emergency power supply is larger than the preset cut-off voltage, if the voltage of the emergency power supply is smaller than the preset cut-off voltage, the emergency power supply is still in an undervoltage state or possibly in a damage state all the time.
In the embodiment of the present invention, the process of determining whether the voltage of the emergency power supply is less than the first preset low-voltage cutoff point may be implemented by using an algorithm or an application program, for example, an application program may be installed in the emergency device, and the application program is used to compare the battery voltage with the preset cutoff voltage, which is not limited herein.
Step S13: and when the voltage of the emergency power supply is smaller than the first preset low-voltage cut-off point, disconnecting the charging loop of the emergency power supply.
In the embodiment of the invention, when the voltage of the emergency power supply after the short-time charging is determined to be smaller than the first preset low-voltage cut-off point, the charging loop of the emergency power supply is disconnected, so that the emergency power supply in an abnormal state is prevented from accidents caused by continuous charging. The process of detecting the voltage of the emergency power supply can be a continuous process, namely, the emergency equipment can continuously monitor the voltage of the emergency power supply by using an application program and a detection element in the transient charging process.
Step S14: and judging whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset duration.
In the embodiment of the invention, after the charging loop of the emergency power supply is disconnected, the temporary charging can be recorded, and whether the temporary charging times reach the preset times or not is judged. After the short-time charging, the charging loop of the emergency power supply is disconnected for a second preset time, and the short-time charging for the first preset time is carried out again after the second preset time so as to try to recover the emergency power supply from the undervoltage state to the normal state. The second preset time period is longer than the first preset time period, for example, the first preset time period may be set to 2 seconds, the second preset time period may be set to 28 seconds, the first preset number of times may be set to 240 times, that is, the time for performing the short charging is 2 hours, and the third preset time period, and the emergency power supply may be determined to be damaged if the emergency power supply is not restored to the normal state after the charging is performed for 240 times or 2 hours.
In the embodiment of the present invention, the process of recording the charging times or the total charging time may be implemented by using an algorithm or an application program, for example, a recording application program may be set in the emergency device, and the recording may be performed after each short charging, and compared with the preset times.
Step S15: and when the charging times do not reach the first preset times or the total charging time does not reach the third preset time, circulating the steps after the second preset time.
In the embodiment of the present invention, the second preset time period is longer than the first preset time period, and the third preset time period is longer than the second preset time period. The first preset time is 2 seconds, and the second preset time is 28 seconds. The first preset number of times is 240 times, and the third preset time is 2 hours.
Step S16: and when the charging times are more than the preset times, determining that the emergency power supply is damaged and disconnecting the charging loop.
In the embodiment of the invention, a preset charging frequency can be set in the emergency equipment, the under-voltage emergency power supply is repeatedly and temporarily charged according to the preset frequency, the emergency power supply is tried to be recovered from the under-voltage state to the normal state, when the repeated and temporary charging frequency exceeds the preset frequency, the temporary charging is not carried out, and the battery is determined to be damaged. In the event that it is determined that the battery has been damaged, a battery damage prompt may be generated prompting replacement of the battery. After the steps, the emergency power supply in the undervoltage state can be recovered to the normal chargeable state, so that the battery is prevented from being damaged due to undervoltage misjudgment.
Example 2
Fig. 2 is a flowchart of an emergency power protection method provided in embodiment 2 of the present invention, where the method includes the following steps:
step S21: and the charging loop is communicated with the emergency power supply and is used for charging the emergency power supply for a first preset time.
This step is identical to step S11 described above, and will not be described herein again.
Step S22: and detecting the voltage of the emergency power supply, and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point.
This step is identical to step S12 described above, and will not be described herein again.
Step S23: and when the voltage of the emergency power supply is smaller than the first preset low-voltage cut-off point, disconnecting the charging loop of the emergency power supply.
This step is identical to step S13 described above, and will not be described herein again.
Step S24: and judging whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset duration.
This step is identical to step S14 described above, and will not be described herein again.
Step S25: and when the charging times do not reach the first preset times or the total charging time does not reach the third preset time, circulating the steps after the second preset time.
This step is identical to step S15 described above, and will not be described herein again.
Step S26: and when the charging times are more than the preset times, determining that the emergency power supply is damaged and disconnecting the charging loop.
This step is identical to step S16 described above, and will not be described herein again.
Step S27: when the voltage of the emergency power supply is larger than a first preset low-voltage cut-off point, the charging loop of the emergency power supply is kept connected, and the normal charging mode is switched.
In the embodiment of the invention, after the short charging for the first preset duration, the voltage of the emergency power supply is greater than the first preset low-voltage cut-off point, which indicates that the emergency power supply is normal or has recovered from the undervoltage state to the normal state, and at this time, the emergency equipment maintains the charging loop of the battery and switches to the normal charging mode.
Example 3
Fig. 3 is a flowchart of an emergency power protection method according to embodiment 3 of the present invention, where the method includes the following steps:
step S301: and the charging loop is communicated with the emergency power supply and is used for charging the emergency power supply for a first preset time.
This step is identical to step S11 described above, and will not be described herein again.
Step S302: and detecting the voltage of the emergency power supply, and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point.
This step is identical to step S12 described above, and will not be described herein again.
Step S303: and when the voltage of the emergency power supply is smaller than the first preset low-voltage cut-off point, disconnecting the charging loop of the emergency power supply.
This step is identical to step S13 described above, and will not be described herein again.
Step S304: and judging whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset duration.
This step is identical to step S14 described above, and will not be described herein again.
Step S305: and when the charging times do not reach the first preset times or the total charging time does not reach the third preset time, circulating the steps after the second preset time.
This step is identical to step S15 described above, and will not be described herein again.
Step S306: and when the charging times are more than the preset times, determining that the emergency power supply is damaged and disconnecting the charging loop.
This step is identical to step S16 described above, and will not be described herein again.
Step S307: when the voltage of the emergency power supply is larger than a first preset low-voltage cut-off point, the charging loop of the emergency power supply is kept connected, and the normal charging mode is switched.
This step is identical to step S27 described above, and will not be described herein again.
Step S308: and when the emergency power supply is used for discharging, detecting the voltage of the emergency power supply and the voltage of a load according to a preset time interval.
In the embodiment of the invention, the emergency power supply may output voltages to various load components in the emergency equipment during the charging process, so as to protect the safety of various loads in the emergency equipment and avoid the components from being damaged by heavy current, and the voltage of the emergency power supply and the voltage of the load in the emergency equipment can be detected according to the preset time interval. For example, the preset time interval may be 0.1 second, the voltage of the emergency power supply and the voltage of the load are recorded every 0.1 second, and a recording table for recording the voltages of the emergency power supply and the load may be established for subsequent judgment.
Step S309: and judging whether the voltage of the emergency power supply is continuously greater than the second preset low-voltage cut-off point within a second preset number of times.
Step S310: and when the voltage of the emergency power supply is continuously greater than the second preset low-voltage cut-off point within the preset times, determining that the voltage is under-voltage output and cutting off the circuit from the emergency power supply to the load.
In the embodiment of the invention, the sum of the load voltage in the emergency equipment and the preset supplementary voltage is a little larger than the voltage of the emergency power supply under normal conditions, so the judgment process cannot only take the voltage value at one time point for comparison, and in order to reduce the detection error, continuous judgment can be carried out, for example, the preset times is 10 times, namely 10 times of recording in 1 second can be continuously judged, when the voltage of the emergency power supply in 10 times of recording is larger than the second preset low-voltage cut-off point, the circuit which outputs undervoltage and cuts off the emergency power supply to the load can be determined, and the second preset low-voltage cut-off point can be 11V. The above determination process may be implemented by using an algorithm or an application program, which is not limited herein.
Example 4
Fig. 4 is a schematic structural diagram of an emergency power protection device provided in embodiment 4 of the present invention.
The emergency power protection device 400 includes:
the charging loop communication module 410 is used for communicating a charging loop of an emergency power supply and charging the emergency power supply for a first preset time;
the battery voltage judging module 420 is configured to detect a voltage of the emergency power supply, and judge whether the voltage of the emergency power supply is smaller than a first preset low-voltage cutoff point;
a charging loop disconnection module 430, configured to disconnect a charging loop of the emergency power supply when the voltage of the emergency power supply is less than the first preset low-voltage cutoff point;
the charging frequency judging module 440 is configured to judge whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset duration;
a charging cycle module 450, configured to cyclically operate the above modules after a second preset time period elapses when the charging frequency does not reach a first preset frequency or the total charging time does not reach a third preset time period;
and a battery damage determining module 460, configured to cyclically run the above modules when the charging frequency is less than or equal to a preset frequency, and determine that the emergency power supply is damaged and disconnect the charging loop when the charging frequency is greater than the preset frequency.
In the embodiment of the present invention, the second preset duration is longer than the first preset duration.
As shown in fig. 5, the emergency power protection device 400 further includes:
and a normal charging switching module 470, configured to maintain the charging loop of the emergency power supply connected when the voltage of the emergency power supply is greater than a first preset low-voltage cut-off point, and switch to a normal charging mode.
In the embodiment of the present invention, for more detailed description of functions of the modules, reference may be made to contents of corresponding parts in the foregoing embodiment, which are not described herein again.
Furthermore, the present invention also provides an emergency lighting device, which comprises a memory and a processor, wherein the memory can be used for storing a computer program, and the processor can be used for operating the computer program, so that the emergency lighting device executes the functions of the above method or each module in the above emergency power protection device.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the stored data area may store data created from use of the emergency lighting device (such as audio data, a phone book, etc.), and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The present embodiment also provides a computer storage medium for storing a computer program for use in the above-described emergency lighting device.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing an emergency lighting device to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. An emergency power supply protection method, comprising:
the charging circuit is communicated with an emergency power supply, and the emergency power supply is charged for a first preset time;
detecting the voltage of the emergency power supply, and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point or not;
when the voltage of the emergency power supply is smaller than the first preset low-voltage cut-off point, a charging loop of the emergency power supply is disconnected;
after a second preset time length, judging whether the charging frequency of the emergency power supply reaches a first preset frequency or whether the total charging time reaches a third preset time length, wherein the charging frequency is the frequency of charging the emergency power supply for the first preset time length, and the total charging time is the product of the charging frequency and the sum of the first preset time length and the second preset time length;
when the charging times do not reach a first preset time or the total charging time does not reach a third preset time, the steps are circulated;
when the charging times are greater than the preset times or the total charging time is greater than a third preset time length, determining that the emergency power supply is damaged and disconnecting a charging loop;
when the voltage of the emergency power supply is larger than a first preset low-voltage cut-off point, the charging loop of the emergency power supply is kept connected, and the normal charging mode is switched.
2. The emergency power protection method of claim 1, wherein the emergency power supply comprises a rechargeable battery.
3. The emergency power protection method of claim 1, wherein the second predetermined period of time is greater than the first predetermined period of time, and the third predetermined period of time is greater than the second predetermined period of time.
4. The emergency power protection method of claim 1, wherein the first predetermined time period is 2 seconds and the second predetermined time period is 28 seconds.
5. The emergency power protection method according to claim 4, wherein the first predetermined number of times is 240 times, and the third predetermined time period is 2 hours.
6. The emergency power protection method of claim 1, further comprising:
detecting the voltage of the emergency power supply according to a preset time interval when the emergency power supply is used for discharging;
judging whether the voltage of the emergency power supply is continuously greater than a second preset low-voltage cut-off point within a second preset number of times;
and when the voltage of the emergency power supply is continuously greater than the second preset low-voltage cut-off point within the preset times, determining that the voltage is under-voltage output and cutting off the circuit from the emergency power supply to the load.
7. The emergency power protection method according to claim 6, wherein the predetermined time interval is 0.1 second and the second predetermined number of times is 10 times.
8. An emergency power supply protection device, comprising:
the charging loop communication module is used for communicating a charging loop of an emergency power supply and charging the emergency power supply for a first preset time;
the battery voltage judging module is used for detecting the voltage of the emergency power supply and judging whether the voltage of the emergency power supply is smaller than a first preset low-voltage cut-off point or not;
the charging loop disconnection module is used for disconnecting the charging loop of the emergency power supply when the voltage of the emergency power supply is smaller than the first preset low-voltage cut-off point;
the charging time judging module is used for judging whether the charging time of the emergency power supply reaches a first preset time or not or whether the total charging time reaches a third preset time or not after a second preset time, wherein the charging time is the time for charging the emergency power supply for the first preset time, and the total charging time is the product of the charging time and the sum of the first preset time and the second preset time;
the charging cycle module is used for circularly operating the modules when the charging times do not reach a first preset time or the total charging time does not reach a third preset time;
the battery damage determining module is used for determining that the emergency power supply is damaged and disconnecting the charging loop when the charging times are greater than the preset times or the total charging time is greater than a third preset duration;
and the normal charging switching module is used for maintaining the communication of the charging loop of the emergency power supply when the voltage of the emergency power supply is greater than a first preset low-voltage cut-off point, and switching to a normal charging mode.
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