CN116388313B - Battery reverse connection prevention control method and device - Google Patents
Battery reverse connection prevention control method and device Download PDFInfo
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- CN116388313B CN116388313B CN202211651770.3A CN202211651770A CN116388313B CN 116388313 B CN116388313 B CN 116388313B CN 202211651770 A CN202211651770 A CN 202211651770A CN 116388313 B CN116388313 B CN 116388313B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000002265 prevention Effects 0.000 title claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 230000005669 field effect Effects 0.000 claims description 25
- 238000004590 computer program Methods 0.000 claims description 17
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- 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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application belongs to the technical field of battery charging, and provides a battery reverse connection prevention control method and device, which are based on a charging device comprising an alternating current-direct current conversion circuit, a filter circuit and a switch circuit which are connected in sequence, wherein alternating current is firstly accessed; the control switch circuit is in a current limiting state and judges whether the battery is reversely connected or not; if the battery is judged not to be reversely connected, then the switch circuit is controlled to be in a conducting state, and whether the current of the filtered direct current is larger than a preset current or not is judged; if the current of the filtered direct current is less than or equal to the preset current, controlling the switch circuit to be in the current-limiting state for a second preset time period at intervals of a first preset time period, and judging whether the battery is reversely connected or not when the switch circuit is in the current-limiting state for the second preset time period; if the reverse connection of the battery is judged, the switch circuit is controlled to be in the off state finally, so that the impact current generated at the instant of the reverse connection of the battery is limited, the charging device is protected, and the service life of the battery is prolonged.
Description
Technical Field
The application belongs to the technical field of battery charging, and particularly relates to a battery reverse connection prevention control method and device.
Background
When the battery is charged, a reverse connection condition exists, and a large impact current can be generated during the reverse connection, so that a charging electronic device is damaged, and the service life of the battery is shortened; the current battery reverse connection prevention method adopts a switching element with high response speed to realize a circuit protection function, but the driving circuit is required to be driven by the switching element, and delay is introduced by the driving circuit, so that the requirement on the switching element is very high, if the switching element cannot be turned off in time, the switching element is damaged by hundred ampere of impact current, a charging device is damaged, and the service life of the battery is shortened.
Disclosure of Invention
The purpose of the application is to provide a battery reverse connection prevention control method and device, and aims to solve the problem that the impact current is large when a battery is reversely connected in the traditional battery charging process.
In a first aspect, an embodiment of the present application provides a battery reverse connection prevention control method, based on a charging device, where the charging device includes an ac/dc conversion circuit, a filter circuit, and a switch circuit that are sequentially connected; the alternating current-direct current conversion circuit converts the accessed alternating current into direct current; the filter circuit filters the direct current; the switch circuit switches the filtered direct current to a battery in a conducting state, stops switching the filtered direct current to the battery in an off state, limits the current of the filtered direct current in a current limiting state and switches the current-limited direct current to the battery; the battery reverse connection prevention control method comprises the following steps:
the alternating current is connected;
controlling the switch circuit to be in a current-limiting state, and judging whether the battery is reversely connected or not when the switch circuit is in the current-limiting state;
if the battery is judged not to be reversely connected, the switch circuit is controlled to be in a conducting state, and whether the current of the filtered direct current is larger than a preset current or not is judged;
if the current of the filtered direct current is less than or equal to the preset current, controlling the switch circuit to be in a current-limiting state for a second preset time period every a first preset time period, and judging whether the battery is reversely connected or not when the switch circuit is in the current-limiting state for the second preset time period;
and if the battery is judged to be reversely connected, controlling the switch circuit to be in an off state.
In a second aspect, an embodiment of the present application provides a battery reverse connection preventing control device, based on a charging device, where the charging device includes an ac/dc conversion circuit, a filter circuit, and a switch circuit that are sequentially connected; the alternating current-direct current conversion circuit converts the accessed alternating current into direct current; the filter circuit filters the direct current; the switch circuit switches the filtered direct current to the battery in a conducting state, stops switching the filtered direct current to the battery in an off state, limits the current of the filtered direct current in a current limiting state and switches the current-limited direct current to the battery; comprising the following steps:
the access module is used for accessing the alternating current;
the first judging module is used for controlling the switch circuit to be in a current-limiting state and judging whether the battery is reversely connected or not when the switch circuit is in the current-limiting state;
the second judging module is used for controlling the switch circuit to be in a conducting state if the first judging module judges that the battery is not reversely connected, and judging whether the current of the filtered direct current is larger than a preset current or not;
the third judging module is used for judging whether the battery is reversely connected or not if the second judging module judges that the current of the filtered direct current is smaller than or equal to the preset current, controlling the switch circuit to be in the current limiting state for a second preset time length every a first preset time length, and judging whether the battery is reversely connected or not when the switch circuit is in the current limiting state for the second preset time length;
and the first turn-off module is used for controlling the switch circuit to be in a turn-off state if the third judging module judges that the battery is reversely connected.
In a third aspect, embodiments of the present application provide a control device including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the method described above when executing the computer program.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the method described above.
It will be appreciated that the advantages of the second to fourth aspects may be found in the relevant description of the first aspect and are not repeated here.
According to the embodiment of the invention, after the alternating current is accessed, the switch circuit is controlled to be in a current-limiting state, when the battery is judged to be not reversely connected, the switch circuit is controlled to be in a conducting state, when the current of the filtered direct current is judged to be less than or equal to the preset current, the switch circuit is controlled to be in the current-limiting state for a second preset time period every first preset time period, and when the switch circuit is in the current-limiting state for the second preset time period, whether the battery is reversely connected is judged; therefore, when the second preset time period is shorter, the switch circuit is in the current-limiting state to detect whether the battery is reversely connected, for example, the battery is reversely connected, the circuit period formed by the battery, the switch circuit and the filter circuit is short, and the circuit is subjected to current limiting, so that the impact current generated in the moment of reversely connecting the battery is limited, the charging device is protected, and the service life of the battery is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit block diagram of a charging device on which a battery reverse connection prevention control method according to an embodiment of the present disclosure is based;
fig. 2 is a schematic flow chart of a battery reverse connection prevention control method according to an embodiment of the present disclosure;
FIG. 3 is a schematic circuit diagram of a portion of the circuit blocks in the circuit block diagram of the charging device shown in FIG. 1;
fig. 4 is a schematic flow chart of a battery reverse connection prevention control method according to another embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a battery anti-reverse connection control device according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a battery anti-reverse connection control device according to another embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a battery anti-reverse connection control device according to another embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a battery anti-reverse connection control device according to another embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a battery anti-reverse connection control device according to another embodiment of the present application.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
As used in this specification and the appended claims, the term "if" may be construed as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Fig. 1 shows a circuit block diagram of a charging device according to a first embodiment of the present application, and for convenience of explanation, only the portions related to the present embodiment are shown, and the details are as follows:
the charging device comprises an alternating current-direct current conversion circuit 300, a filter circuit 200 and a switch circuit 100 which are sequentially connected; the ac-dc conversion circuit 300 converts the ac power into dc power; the filter circuit 200 filters the direct current; the switching circuit 100 switches the filtered dc power to the battery in the on state, stops switching the filtered dc power to the battery in the off state, limits the current of the filtered dc power in the current-limiting state, and switches the current-limited dc power to the battery.
The switch circuit 100 can implement current limiting on the filtered dc and transfer the current-limited dc to the battery in the current-limiting state, and if the battery is reversely connected, the switch circuit 100 transfers the current-limited dc to the battery, so that the magnitude of the impact current is directly limited, and damage to the charging device and the battery caused by excessive impact current can be fundamentally avoided.
Based on the above charging device, fig. 2 shows a schematic flowchart of the battery anti-reverse connection control method provided in the present application, where the battery anti-reverse connection control method includes steps S100 to S140.
In step S100, ac power is supplied.
In step S110, the switch circuit 100 is controlled to be in a current-limiting state, and when the switch circuit 100 is in the current-limiting state, it is determined whether the battery is reversely connected.
In step S120, if it is determined that the battery is not reversely connected, the switch circuit 100 is controlled to be in the on state, and it is determined whether the current of the filtered dc power is greater than the preset current.
In step S130, if it is determined that the current of the filtered dc power is less than or equal to the preset current, the switch circuit 100 is controlled to be in the current-limiting state for a second preset period of time every a first preset period of time, and if the switch circuit 100 is in the current-limiting state for the second preset period of time, it is determined whether the battery is reversely connected.
In step S140, if it is determined that the battery is reversely connected, the control switch circuit 100 is in an off state.
It should be noted that, judging whether the battery is reversely connected specifically is: judging whether the battery voltage is smaller than a second preset number of times of preset voltage; if the battery voltage is judged to be smaller than the preset voltage for the second preset times, the reverse connection of the battery is judged; if the battery voltage is larger than the preset voltage and smaller than the second preset times, the battery is judged to be connected positively. Wherein the preset voltage may be less than-15V and greater than-25V, and the second preset number of times may be greater than 1 time and less than 5 times.
By way of example and not limitation, as shown in fig. 3, the filter circuit 200 includes a capacitor C1, and the circuit is simple and reliable.
The switching circuit 100 includes a first fet Q1, a second fet Q2, and a first resistor R1.
The gate of the second field effect transistor Q2 is used as a first control signal input end of the switch circuit 100 to be connected with a first control signal; the gate of the first field effect transistor Q1 is used as a second control signal input end of the switching circuit 100 to be connected with a second control signal; the source electrode of the second field effect transistor Q2 and the source electrode of the first field effect transistor Q1 are used as the negative electrode of the direct current input end of the switching circuit 100 together and are connected with the filter circuit so as to be connected with the filtered direct current; the drain electrode of the second field effect transistor Q2 is connected to the first end of the first resistor R1, and the second end of the first resistor R1 and the drain electrode of the first field effect transistor Q1 are used together as the negative electrode of the dc output end of the switching circuit 100, and are connected to the battery, so as to output the filtered dc or the current-limited dc.
The switch circuit 100 outputs the filtered direct current through the first field effect transistor Q1, so that the battery can be charged normally under the condition that the battery is connected positively, and outputs the current-limited direct current through the second field effect transistor Q2 and the first resistor R1, so that the impact current can be limited under the condition that the battery is connected reversely, and the charging device and the battery are protected.
In one possible implementation, the gate of the second fet Q2 is used as the first control signal input terminal of the switching circuit 100 to access the first control signal, so that the fet switching speed is fast, and a shorter time response to the control signal can be achieved.
In another possible implementation manner, the second field effect transistor Q2 may also use a relay, where the relay has an isolation function, and may achieve complete isolation between the driving circuit and the battery, with high reliability.
Note that, the control switch circuit 100 is in the off state specifically includes: the supply of the first control signal is stopped to turn off the second fet Q2, and the supply of the second control signal is stopped to turn off the first fet Q1.
The control switch circuit 100 is in a current limiting state specifically: the first control signal is provided to turn on the second fet Q2 and the second control signal is stopped to turn off the first fet Q1.
The control switch circuit 100 is in a conductive state specifically: the first control signal is stopped to turn off the second fet Q2, and the second control signal is supplied to turn on the first fet Q1.
The switching of different states of the control switch circuit 100 is realized by controlling the switches of the first field effect transistor Q1 and the second field effect transistor Q2, the operation is simple and quick, and the circuit construction cost is low.
Fig. 4 shows another schematic flowchart of the battery anti-reverse connection control method provided by the present application, and the battery anti-reverse connection control method includes steps S200 to S250c.
In step S200, ac power is supplied.
In step S210, when ac power is supplied, it is determined whether the battery is reversely connected.
In step S220a, if it is determined that the battery is reversely connected, the control switch circuit 100 is in an off state.
When the battery is first connected, the charging device is not connected with alternating current, and is in a non-working state, then connected with alternating current, and the switch circuit 100 is in an off state by default. If the battery is determined to be reversely connected, the control switch circuit 100 is kept in the off state, and the switch circuit is not turned on at all times, so that no large impact current flows through the charging device and the battery at the moment, and damage to the charging device and the battery can be avoided.
In step S220b, if it is determined that the battery is not reversely connected, the switch circuit 100 is controlled to be in the current-limiting state, and if the switch circuit 100 is in the current-limiting state, it is determined whether the battery is reversely connected.
In step S230a, if it is determined that the battery is reversely connected, the control switch circuit 100 is in an off state.
When the battery is reversely connected, the switch circuit 100 is directly controlled to be in an off state, so that the charging device is prevented from continuously outputting charging current to the battery, and the charging device and the battery are prevented from being damaged.
In step S230b, if it is determined that the battery is not reversely connected, the switch circuit 100 is controlled to be in the on state, and it is determined whether the current of the filtered dc power is greater than the preset current.
In step S240a, if it is determined that the current of the filtered dc power is less than or equal to the preset current, the switch circuit 100 is controlled to be in the current-limiting state for a second preset period of time every a first preset period of time, and if the switch circuit 100 is in the current-limiting state for the second preset period of time, it is determined whether the battery is reversely connected.
In step S250a, if it is determined that the battery is reversely connected, the control switch circuit 100 is in an off state.
If it is determined that the battery is not reversely connected, step S240a is repeatedly performed. It should be noted that, after the step S240a is repeatedly performed for the first preset number of times, the switch circuit 100 is controlled to be in the off state. When the battery is charged into the float charge state, the step S240a is repeatedly executed for a first preset number of times, and the float charge is completed, so that the switch circuit 100 is controlled to be in the off state, thereby avoiding overcharge of the battery and damaging the battery performance.
In step S240b, if it is determined that the current of the filtered dc power is greater than the preset current, the switching circuit is maintained in the on state; the battery is now in a normal charge phase.
In step S250c, it is determined in real time whether the current of the filtered direct current is greater than a preset current; through step S250c, it is determined whether the battery is switched from the normal charge phase to the float charge phase.
If the current of the filtered direct current is greater than the preset current, repeating the step S240b; at this time, the battery is still in the normal charging stage, and the switch circuit is maintained in the on state.
If it is determined that the current of the filtered dc power is less than or equal to the preset current, step S240a is performed. The first control signal and the second control signal control the switching circuit to switch the normal charging phase of the battery to the float charging phase, and float charging is achieved through step S240a.
The embodiment of the application also provides a battery reverse connection prevention control device, which is based on the charging device shown in fig. 1, wherein the charging device comprises an alternating current-direct current conversion circuit 300, a filter circuit 200 and a switch circuit 100 which are sequentially connected; the ac-dc conversion circuit 300 converts the ac power into dc power; the filter circuit 200 filters the direct current; the switching circuit 100 switches the filtered direct current to the battery in the on state, stops switching the filtered direct current to the battery in the off state, performs current limiting on the filtered direct current in the current limiting state, and switches the current-limited direct current to the battery; as shown in fig. 5, the above-mentioned battery reverse connection prevention control device includes an access module 400, a first judgment module 410, a second judgment module 420, a third judgment module 430, and a first shutdown module 440.
The access module 400 is used for accessing alternating current.
The first determining module 410 is configured to control the switch circuit 100 to be in a current-limiting state, and determine whether the battery is reversely connected when the switch circuit 100 is in the current-limiting state.
The second determining module 420 is configured to control the switch circuit 100 to be in a conductive state and determine whether the current of the filtered dc power is greater than a preset current if the first determining module 410 determines that the battery is not reversely connected.
The third judging module 430 is configured to control the switch circuit 100 to be in the current-limiting state for a second preset duration at intervals of the first preset duration, and judge whether the battery is reversely connected when the switch circuit 100 is in the current-limiting state for the second preset duration if the second judging module 420 judges that the current of the filtered dc is less than or equal to the preset current.
The first shutdown module 440 is configured to control the switch circuit 100 to be in a shutdown state if the third determination module 430 determines that the battery is reversely connected.
As shown in fig. 6, the battery anti-reverse connection control device further includes a fourth judging module 450 and a second shutdown module 460.
And a fourth judging module 450, configured to judge whether the battery is reversely connected when the alternating current is connected.
The second shutdown module 460 is configured to control the switch circuit 100 to be in a shutdown state if the fourth determination module 450 determines that the battery is reversely connected.
If the fourth determination module 450 determines that the charging device battery is not connected in reverse, the first determination module 410 is triggered.
As shown in fig. 7, the battery anti-reverse connection control device further includes a third shutdown module 470.
The third shutdown module 470 is configured to control the switch circuit 100 to be in a shutdown state if the first determination module 410 determines that the battery is reversely connected.
As shown in fig. 8, if the third determining module 430 determines that the battery is not connected reversely, the third determining module 430 is triggered repeatedly.
As shown in fig. 9, the battery anti-reverse connection control device further includes a maintenance module 480 and a fifth determination module 490.
A maintenance module 480, configured to maintain the charging device switching circuit 100 in a conductive state if the second determination module 420 determines that the current of the filtered dc power is greater than the preset current;
a fifth determining module 490, configured to determine in real time whether the current of the filtered dc power is greater than a preset charging device current;
if the fifth decision module 490 decides that the current of the filtered dc current is greater than the preset current, then the maintenance module 480 is triggered;
if the fifth determining module 490 determines that the current of the filtered dc power is less than or equal to the preset current, the third determining module 430 is triggered.
The embodiment of the application also provides a control device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program to realize the method in each embodiment.
The embodiments of the present application also provide a computer readable storage medium storing a computer program, which when executed by a processor, implements the methods in the above embodiments.
The embodiment of the invention is based on a charging device comprising an alternating current-direct current conversion circuit, a filter circuit and a switch circuit which are connected in sequence, and the switch circuit is controlled to be in a current-limiting state and whether a battery is reversely connected is judged; if the battery is judged not to be reversely connected, the switch circuit is controlled to be in a conducting state, and whether the current of the filtered direct current is larger than a preset current or not is judged; if the current of the filtered direct current is less than or equal to the preset current, controlling the switch circuit to be in a current-limiting state for a second preset time period every a first preset time period, and judging whether the battery is reversely connected or not when the switch circuit is in the current-limiting state for the second preset time period; if the reverse connection of the battery is judged, the switch circuit is controlled to be in an off state, so that the impact current generated at the instant of the reverse connection of the battery is limited, the charging device is protected, and the service life of the battery is prolonged.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each method embodiment described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (12)
1. The battery reverse connection prevention control method is based on a charging device, wherein the charging device comprises an alternating current-direct current conversion circuit, a filter circuit and a switch circuit which are sequentially connected; the alternating current-direct current conversion circuit converts the accessed alternating current into direct current; the filter circuit filters the direct current; the switch circuit switches the filtered direct current to a battery in a conducting state, stops switching the filtered direct current to the battery in an off state, limits the current of the filtered direct current in a current limiting state and switches the current-limited direct current to the battery; the battery reverse connection prevention control method is characterized by comprising the following steps of:
the alternating current is connected;
controlling the switch circuit to be in a current-limiting state, and judging whether the battery is reversely connected or not when the switch circuit is in the current-limiting state;
if the battery is judged not to be reversely connected, the switch circuit is controlled to be in a conducting state, and whether the current of the filtered direct current is larger than a preset current or not is judged;
if the current of the filtered direct current is less than or equal to the preset current, controlling the switch circuit to be in a current-limiting state for a second preset time period every a first preset time period, and judging whether the battery is reversely connected or not when the switch circuit is in the current-limiting state for the second preset time period;
if the battery is judged to be reversely connected, the switch circuit is controlled to be in an off state;
if the current of the filtered direct current is larger than the preset current, maintaining the switching circuit in a conducting state;
judging whether the current of the filtered direct current is larger than the preset current or not in real time;
if the current of the filtered direct current is larger than the preset current, repeating the step of maintaining the switch circuit in a conducting state;
and if the current of the filtered direct current is less than or equal to the preset current, executing the steps of controlling the switching circuit to be in the current-limiting state for a second preset time period every first preset time period, and judging whether the battery is reversely connected or not when the switching circuit is in the current-limiting state for the second preset time period.
2. The battery reverse connection prevention control method according to claim 1, wherein the controlling the switching circuit in a current limiting state, and before determining whether the battery is reverse connected when the switching circuit is in a current limiting state, further comprises:
when the alternating current is connected, judging whether the battery is reversely connected or not;
if the battery is judged to be reversely connected, the switch circuit is controlled to be in an off state;
and if the battery is judged not to be reversely connected, executing the step of controlling the switch circuit to be in a current-limiting state and judging whether the battery is reversely connected when the switch circuit is in the current-limiting state.
3. The battery reverse connection prevention control method according to claim 1, wherein the controlling the switching circuit in a current limiting state, and the judging whether the battery is reverse connected when the switching circuit is in a current limiting state further comprises:
and if the battery is judged to be reversely connected, controlling the switch circuit to be in an off state.
4. The method for controlling reverse connection prevention of a battery according to claim 1, wherein if it is determined that the current of the filtered dc power is less than or equal to a preset current, controlling the switching circuit to be in a current-limiting state for a second preset period of time every a first preset period of time, and determining whether the battery is reverse-connected after the switching circuit is in the current-limiting state for the second preset period of time, further comprises:
and if the battery is judged not to be reversely connected, repeatedly executing the steps of controlling the switching circuit to be in the current-limiting state for a second preset time period every first preset time period, and judging whether the battery is reversely connected or not when the switching circuit is in the current-limiting state for the second preset time period.
5. The method for controlling reverse connection prevention of a battery according to claim 4, wherein the step of controlling the switching circuit to be in the current-limiting state for a second preset time period every a first preset time period is repeatedly performed, and judging whether the battery is reverse-connected after the step of judging whether the switching circuit is in the current-limiting state for the second preset time period is performed for the first preset time period, and controlling the switching circuit to be in the off state.
6. The battery reverse connection prevention control method according to claim 1, wherein the switching circuit comprises a first field effect transistor, a second field effect transistor and a first resistor;
the grid electrode of the second field effect transistor is used as a first control signal input end of the switch circuit so as to be connected with a first control signal; the grid electrode of the first field effect transistor is used as a second control signal input end of the switch circuit so as to be connected with a second control signal; the source electrode of the second field effect tube and the source electrode of the first field effect tube are used as the negative electrode of the direct current input end of the switch circuit together and are connected with the filter circuit so as to be connected with the filtered direct current; the drain electrode of the second field effect tube is connected with the first end of the first resistor, the second end of the first resistor and the drain electrode of the first field effect tube are used as the negative electrode of the direct current output end of the switch circuit together and are connected with the battery so as to output the direct current after filtering or the direct current after current limiting.
7. The method for controlling reverse connection prevention of a battery according to claim 6, wherein the controlling the switch circuit in the off state is specifically:
stopping providing the first control signal to cut off the second field effect transistor, and stopping providing the second control signal to cut off the first field effect transistor.
8. The method for controlling reverse connection prevention of a battery according to claim 6, wherein the controlling the switching circuit in the current limiting state is specifically:
and providing the first control signal to enable the second field effect transistor to be conducted, and stopping providing the second control signal to enable the first field effect transistor to be turned off.
9. The method for controlling reverse connection prevention of a battery according to claim 6, wherein the controlling the switch circuit to be in a conductive state is specifically:
stopping providing the first control signal to stop the second field effect transistor, and providing the second control signal to stop the first field effect transistor.
10. The battery reverse connection prevention control device is based on a charging device, and the charging device comprises an alternating current-direct current conversion circuit, a filter circuit and a switch circuit which are sequentially connected; the alternating current-direct current conversion circuit converts the accessed alternating current into direct current; the filter circuit filters the direct current; the switch circuit switches the filtered direct current to the battery in a conducting state, stops switching the filtered direct current to the battery in an off state, limits the current of the filtered direct current in a current limiting state and switches the current-limited direct current to the battery; characterized by comprising the following steps:
the access module is used for accessing the alternating current;
the first judging module is used for controlling the switch circuit to be in a current-limiting state and judging whether the battery is reversely connected or not when the switch circuit is in the current-limiting state;
the second judging module is used for controlling the switch circuit to be in a conducting state if the first judging module judges that the battery is not reversely connected, and judging whether the current of the filtered direct current is larger than a preset current or not;
the third judging module is used for judging whether the battery is reversely connected or not if the second judging module judges that the current of the filtered direct current is smaller than or equal to the preset current, controlling the switch circuit to be in the current limiting state for a second preset time length every a first preset time length, and judging whether the battery is reversely connected or not when the switch circuit is in the current limiting state for the second preset time length;
the first turn-off module is used for controlling the switch circuit to be in a turn-off state if the third judging module judges that the battery is reversely connected;
the maintenance module is used for maintaining the switching circuit of the charging device in a conducting state if the second judgment module judges that the current of the filtered direct current is larger than the preset current;
the fifth judging module is used for judging whether the current of the filtered direct current is larger than the preset current of the charging device in real time;
if the fifth judging module judges that the current of the filtered direct current is larger than the preset current, repeating the step of maintaining the switch circuit in a conducting state;
and if the fifth judging module judges that the current of the filtered direct current is smaller than or equal to the preset current, executing the steps of controlling the switching circuit to be in the current limiting state for a second preset time period every first preset time period, and judging whether the battery is reversely connected or not when the switching circuit is in the current limiting state for the second preset time period.
11. A control device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any one of claims 1 to 9 when executing the computer program.
12. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the method according to any one of claims 1 to 9.
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| CN202211651770.3A CN116388313B (en) | 2022-12-21 | 2022-12-21 | Battery reverse connection prevention control method and device |
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| CN202211651770.3A CN116388313B (en) | 2022-12-21 | 2022-12-21 | Battery reverse connection prevention control method and device |
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| CN116388313B true CN116388313B (en) | 2023-12-29 |
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| CN116388313A (en) | 2023-07-04 |
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