CN112421710A - Intelligent charging protection system and method for battery pack - Google Patents
Intelligent charging protection system and method for battery pack Download PDFInfo
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- CN112421710A CN112421710A CN202011173487.5A CN202011173487A CN112421710A CN 112421710 A CN112421710 A CN 112421710A CN 202011173487 A CN202011173487 A CN 202011173487A CN 112421710 A CN112421710 A CN 112421710A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims abstract description 53
- 230000003287 optical effect Effects 0.000 claims description 27
- 238000012544 monitoring process Methods 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 14
- 230000002457 bidirectional effect Effects 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 230000001052 transient effect Effects 0.000 abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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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
- 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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Abstract
The invention discloses an intelligent charging protection system and method of a battery pack, wherein the intelligent charging protection system of the battery pack comprises: the system comprises a processor, a front-end input buffer module and a rear-end output identification module; the rear-end output identification module is electrically connected with the processor and the battery pack respectively; the front-end input buffer module is electrically connected with a charging circuit of the battery pack; the front-end input buffer module is used for realizing spark-free starting of a switching power supply in the charging circuit; the rear-end output identification module is used for judging whether the output voltage of the battery pack is in a stable state. Therefore, the invention can effectively inhibit the transient current when the battery pack is electrified, realize the slow charging of the output filter capacitor by the load battery at the output end, eliminate the arc ignition phenomenon at the two ends and improve the charging protection efficiency and the safety of the battery pack.
Description
Technical Field
The invention relates to the technical field of battery charging control, in particular to an intelligent charging protection system of a battery pack.
Background
The traditional charging equipment has the advantages of single charging mode, large charging current pulsation, rough charging mode, low charging speed and long charging time. For the three-stage charging of the charging front region, the platform region and the charging end region, the fitting degree of the three-stage charging method to the charging curve is not high enough; secondly, because the capacitive load of the switching power supply is equivalent to a short circuit at the electrifying moment, a negative temperature coefficient resistor (NTC) is connected in series at a high-voltage input end in a conventional measure, but the mode cannot completely inhibit transient current, an interface contact is easy to generate an ignition phenomenon, and moreover, the matching of a load battery cannot be judged, and the anti-reverse function is not realized. Therefore, the invention of a perfect and reliable intelligent charging protection system for a battery pack becomes a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The present invention provides an intelligent charging protection system and method for a battery pack, aiming at the above-mentioned defects in the prior art.
In a first aspect, the invention discloses an intelligent charging protection system of a battery pack, which comprises a processor, a front-end input buffer module and a rear-end output identification module; the rear-end output identification module is electrically connected with the processor and the battery pack respectively; the front-end input buffer module is electrically connected with a charging circuit of the battery pack; the front-end input buffer module is used for realizing spark-free starting of a switching power supply in the charging circuit; the rear-end output identification module is used for judging whether the output voltage of the battery pack is in a stable state.
Preferably, the intelligent charging protection system for the battery pack further comprises a feedback loop control module; the feedback loop control module is electrically connected with the battery pack and the rear-end output identification module respectively, and is used for controlling the output voltage of the battery pack within a preset range.
Preferably, the intelligent charging protection system for the battery pack further comprises a monitoring module; the monitoring module is respectively electrically connected with the processor and the front-end input buffer module; the monitoring module is used for detecting whether the front-end input buffer module works normally or not.
Preferably, the feedback loop control module comprises a control unit, a main feedback unit and an auxiliary feedback unit; the main feedback unit is electrically connected with the control unit and the rear-end output identification module respectively, and the auxiliary feedback unit is electrically connected with the control unit and the rear-end output identification module respectively.
Preferably, the front-end input buffer module includes a first optocoupler, a second optocoupler, a third optocoupler, a bidirectional thyristor, a common-mode inductor, a rectifier bridge, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; the first end of the first resistor is electrically connected with an alternating current input end, the first end of the bidirectional thyristor and the first end of the first optical coupler respectively, the second end of the first resistor is electrically connected with the first end of the second optical coupler and the second end of the bidirectional thyristor respectively, the second end of the second optical coupler is electrically connected with the third end of the bidirectional thyristor, the second end of the first optical coupler, the first end of the common mode inductor and the first end of the first capacitor respectively, the third end of the first optical coupler is electrically connected with the first end of the processor, the fourth end of the first optical coupler is electrically connected with the second end of the processor, the third end of the second optical coupler is electrically connected with the third end of the processor, the fourth end of the second optical coupler is grounded, and the second end of the common mode inductor is electrically connected with the alternating current input end and the second end of the first capacitor respectively, the third end of common mode inductance respectively with the first end of second electric capacity the first end electricity of rectifier bridge is connected, the second end of second electric capacity with the first end electricity of third electric capacity is connected, the second end of third electric capacity respectively with the fourth end of common mode inductance reaches the second end electricity of rectifier bridge is connected, the third end of rectifier bridge respectively with the first end of fourth electric capacity reaches the first end electricity of third opto-coupler, the second end of fourth electric capacity respectively with the fourth end of rectifier bridge the first end of second resistance and power input end electricity are connected, the first end of second resistance with the second end electricity of third opto-coupler is connected, the third end of third opto-coupler with the first end electricity of treater is connected, the fourth end ground connection of third opto-coupler.
Preferably, the rear-end output identification module comprises a three-terminal regulator, a controlled silicon, a diode, a fifth capacitor, a sixth capacitor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor; the first end of the three-terminal regulator is respectively electrically connected with the first end of a third resistor, the first end of a fifth capacitor and the anode of a battery pack, the second end of the third resistor is electrically connected with the first end of a fourth resistor, the second end of the fourth resistor is respectively electrically connected with the first end of the fifth resistor and the first end of a sixth resistor, the second end of the fifth resistor is respectively electrically connected with the first end of the sixth capacitor and the fourth end of the processor, the second end of the three-terminal regulator is electrically connected with the fifth end of the processor, the cathode of the battery pack is respectively electrically connected with the first end of a seventh resistor and the first end of the controllable silicon, the second end of the controllable silicon is electrically connected with the first end of an eighth resistor, the second end of the eighth resistor is electrically connected with the sixth end of the processor, and the third end of the controllable silicon is respectively electrically connected with the first end of a ninth resistor, and the second end of the eighth resistor is electrically connected with the first end of the diode, and the second end of the diode, the second end of the ninth resistor, the second end of the third resistor and the third end of the three-terminal regulator are grounded.
In a second aspect, the present invention also discloses a method, comprising:
initializing a control system, and closing a front-end high-voltage circuit part and a rear-end control circuit part of the charging circuit;
detecting a battery pack and judging whether the connection state of the battery pack is normal or not;
if the battery pack is normally accessed, starting the front-end input buffer module, and closing the rear-end output identification module after delaying for a first preset time period;
measuring whether the charging voltage of the battery pack matches a charging requirement;
if the charging voltage of the battery pack is matched with the charging requirement, detecting whether the front-end input buffer module finishes the buffer work;
and if the front-end buffer module finishes the buffer work, closing the front-end buffer module, and starting a charging circuit of the battery pack to enter the charging work.
Preferably, the method further comprises: and if the charging voltage of the battery pack does not match the charging requirement, resetting the system.
The intelligent charging protection system and the method of the battery pack have the following beneficial effects that: the front-end input buffer module and the rear-end output identification module; the back end output identification module comprises a processor and a back end output identification module; the rear-end output identification module is electrically connected with the processor and the battery pack respectively; the front-end input buffer module is electrically connected with a switching power supply of the battery pack; the front-end input buffer module is used for realizing the sparkless starting of the switching power supply; the rear-end output identification module is used for judging whether the output voltage of the battery pack is in a stable state. Therefore, the invention can effectively inhibit the transient current when the battery pack is electrified, and realize that the load battery slowly charges the output filter capacitor at the output end, thereby eliminating the arc ignition phenomenon at the two ends. In addition, the monitoring module is used for monitoring whether the front-end input buffer module is in a normal working state or not, so that the normal operation of the front-end input buffer module is ensured, and the efficiency and the safety of battery pack charging protection are further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
fig. 1 is a schematic block diagram of an intelligent charging protection system for a battery pack according to a preferred embodiment of the present invention;
fig. 2 is a schematic block diagram of an intelligent charging protection system for a battery pack according to another preferred embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a front-end input buffer module of an intelligent charging protection system for a battery pack according to a preferred embodiment of the present invention;
fig. 4 is a schematic block circuit diagram of a back-end output identification module of an intelligent charging protection system for a battery pack according to a preferred embodiment of the present invention;
fig. 5 is a flowchart of an intelligent charging protection method for a battery pack according to a preferred embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
Example one
Fig. 1 shows a preferred embodiment of the present invention, which includes a processor 11, a front-end input buffer module 2 and a back-end output identification module 3; the rear-end output identification module 3 is respectively electrically connected with the processor 1 and the battery pack; the front-end input buffer module 2 is electrically connected with a charging circuit of the battery pack; the front-end input buffer module 2 is used for realizing the sparkless starting of a switching power supply in the charging circuit; the rear-end output identification module 3 is used for judging whether the output voltage of the battery pack is in a stable state. Therefore, the invention can effectively inhibit the transient current when the battery pack A is electrified, and realize that the load battery slowly charges the output filter capacitor at the output end, and eliminate the arc ignition phenomenon at the two ends; and a passive starting mode of load power supply starting is adopted, so that zero-loss standby is realized, and the charging protection efficiency and safety of the battery pack A are improved.
Preferably, referring to fig. 2, the intelligent charging protection system for battery pack a further includes a feedback loop control module 4; the feedback loop control module 4 is electrically connected with the rear-end output identification module 3, and the feedback loop control module 4 is used for controlling the output voltage of the battery pack A within a preset range.
Preferably, referring to fig. 2, the intelligent charging protection system for the battery pack a further includes a monitoring module 5; the monitoring module 5 is respectively electrically connected with the processor 1 and the front-end input buffer module 2; the monitoring module 5 is used for detecting whether the front-end input buffer module 2 works normally. It can be understood that, the monitoring module 5 specifically detects whether there are abnormal situations such as short circuit and short circuit in the front-end input module, and the circuit structure of the monitoring module 5 may adopt an existing short circuit or open circuit detection module, and the circuit structure is not limited specifically herein. In this embodiment, the monitoring module ensures the normal operation of the front-end input buffer module, which is equivalent to adding a layer of protection to the front-end input buffer module 2, so that the present invention further ensures the safety protection of intelligent charging of the battery pack.
Preferably, referring to fig. 2, the feedback loop control module 4 includes a control unit 41, a main feedback unit 42 and an auxiliary feedback unit 43; the main feedback unit 42 is electrically connected to the control unit 41 and the rear-end output recognition module 3, respectively, and the auxiliary feedback unit 43 is electrically connected to the control unit 41 and the rear-end output recognition module 3, respectively. Preferably, in this embodiment, the feedback loop control module 4 is configured to perform maximum power and maximum output voltage control of the system.
Preferably, referring to fig. 3, the front-end input buffer module 2 includes a first optical coupler U1, a first optical coupler U0, a third optical coupler U6, a bidirectional thyristor Q1, a common-mode inductor T1, a rectifier bridge D1, a first resistor R1, a second resistor R3, a first capacitor C3, a second capacitor C1, a third capacitor C4, and a fourth capacitor C2; a first end of the first resistor R1 is electrically connected to an ac input terminal, a first end of the triac Q1 and a first end of the first optocoupler U1, a second end of the first resistor R1 is electrically connected to a first end of the first optocoupler U0 and a second end of the triac Q1, a second end of the first optocoupler U0 is electrically connected to a third end of the triac Q1, a second end of the first optocoupler U1, a first end of the common mode inductor T1 and a first end of the first capacitor C3, a third end of the first optocoupler U1 is electrically connected to the first end of the processor 1, a fourth end of the first optocoupler U1 is electrically connected to the second end of the processor 1, a third end of the first optocoupler U0 is electrically connected to the third end of the processor 1, a fourth end of the first optocoupler U0 is grounded, and a second end of the common mode inductor T1 is electrically connected to the ac input terminal and the second end of the first capacitor C3, the third ends of the common mode inductors T1 are respectively electrically connected with the first end of the second capacitor C1 and the first end of the rectifier bridge D1, a second terminal of the second capacitor C1 is electrically connected to a first terminal of the third capacitor C4, a second terminal of the third capacitor C4 is electrically connected to a fourth terminal of the common-mode inductor T1 and a second terminal of the rectifier bridge D1, the third end of the rectifier bridge D1 is electrically connected with the first end of the fourth capacitor C2 and the first end of the third optocoupler U6 respectively, a second end of the fourth capacitor C2 is electrically connected to the fourth end of the rectifier bridge D1, the first end of the second resistor R3 and the power input end, the first end of the second resistor R3 is electrically connected with the second end of the third optical coupler U6, the third end of the third optical coupler U6 is electrically connected with the first end of the processor 1, and the fourth end of the third optical coupler U6 is grounded.
Preferably, due to the existence of the high-voltage filter capacitor at the front end of the switching power supply in the charging circuit B, electric sparks are generated at the moment when the charging circuit B is electrified. In this embodiment, the working principle for realizing the sparkless start is as follows: when the access after the group battery A, the treater puts low the ON end of first opto-coupler U1 closes first opto-coupler U1, and control the enable end EN of second opto-coupler U0 makes the inside silicon controlled rectifier of second opto-coupler U0 switches ON, and the power process first resistance R1 is progressively slowly to fourth electric capacity C2 charges, works as the voltage of fourth electric capacity fills more than 80% (by the resistance decision of second resistance R3), the output AC _ ON of third opto-coupler U6 is the low level. At this time, the processor 1 closes the second optical coupler U0, enables the ON end of the first optical coupler U1 to be at a high level, and drives the bidirectional thyristor Q1 to be switched ON by the first optical coupler U1 to perform alternating current input, that is, the sparkless starting process is completed; if the third optical coupler U6 is cut off, the front end of the first optical coupler U1 cannot work, and therefore misoperation of the processor is prevented. The second optocoupler U0 is then turned off in order to prevent the first resistor R1 from being damaged due to overheating and being not started because the bidirectional thyristor Q1 is damaged, and the safety is improved. In this embodiment, F1 is a fuse, and the first capacitor C3, the common mode inductor T1, the second capacitor C1, and the third capacitor C4 constitute an EMI filter.
Preferably, referring to fig. 4, the rear-end output identification module 3 includes a three-terminal regulator VR1, a thyristor Q4, a diode D5, a fifth capacitor C11, a sixth capacitor C16, a third resistor R12, a fourth resistor R24, a fifth resistor R13, a sixth resistor R15, a seventh resistor R17, an eighth resistor R16, and a ninth resistor R9; a first end of the three-terminal regulator VR1 is electrically connected to a first end of a third resistor R12, a first end of the fifth capacitor C11, and a positive electrode of the battery a, a second end of the third resistor R12 is electrically connected to a first end of the fourth resistor R24, a second end of the fourth resistor R24 is electrically connected to a first end of the fifth resistor R13 and a first end of the sixth resistor R15, a second end of the fifth resistor R13 is electrically connected to a first end of the sixth capacitor C16 and a fourth end of the processor 1, a second end of the three-terminal regulator VR1 is electrically connected to a fifth end of the processor 1, a negative electrode of the battery a is electrically connected to a first end of the seventh resistor R17 and a first end of the thyristor Q4, a second end of the thyristor Q4 is electrically connected to a first end of the eighth resistor R16, and a second end of the eighth resistor R16 is electrically connected to a sixth end of the processor 1, the third terminal of the thyristor Q4 is electrically connected to the first terminal of the ninth resistor R9, the second terminal of the eighth resistor R16 is electrically connected to the first terminal of the diode D5, and the second terminal of the diode D5, the second terminal of the ninth resistor R9, the second terminal of the sixth capacitor C16, the second terminal of the third resistor R12, and the third terminal of the three-terminal regulator VR1 are grounded.
Preferably, the output end of the charging circuit is provided with a filter capacitor with a certain capacity, and the larger the power of the filter capacitor is, the larger the capacity is; when the battery end is connected firstly and then the high-voltage input voltage end is connected, the battery pack A charges the filter capacitor C11 instantly, so that the phenomenon of sparking is easy to occur at the interface. Therefore, the buffer identification processing must be performed on the output terminal. When the battery pack A is correctly accessed, the battery pack A preferentially charges the filter capacitor C11 through the diode D5 and the seventh resistor R17, the three-terminal voltage regulator VR1 is gradually stabilized, and +5V is output to supply power to the processor 1. The processor 1 sets ENK point high level, the controllable silicon Q4 is conducted, so that the filter capacitor C11 is completely connected with the voltage of the battery, the processor 1 monitors the voltage of the VFB, judges the matching of the battery and finally controls the starting and stopping of the charging circuit B; if the battery pack a is reversely connected, the diode D5 is turned off, and the system cannot be started.
In this embodiment, before charging, the processor 1 first determines whether the output voltage of the battery pack a is stable, if V-FB drops, which indicates that the battery pack a is disconnected from the port, the processor 1 is powered only by the output capacitor and the voltage rapidly decays, and the processor 1 cannot start charging; if the output voltage of the battery pack A is stable, the processor starts a charging circuit B; after full charging, the charging circuit B is firstly closed, the current of the controlled silicon Q4 is 0 at the moment, the ENK of the eighth resistor R16 is put low, the controlled silicon Q4 is completely closed, the processor 1 circularly detects the attenuation degree of the V-FB voltage, and if the attenuation time is too long, charging can be started again to maintain the full-charged state of the battery. In the present embodiment, the ninth resistor R9 is a charging current sampling resistor for system monitoring and recording the charging curve of the charging circuit.
Example two
The present invention also discloses a method, please refer to fig. 5, including the intelligent charging protection system of the battery pack a according to the first aspect, the method includes:
s1, initializing a control system, and closing a front-end high-voltage circuit part and a rear-end control circuit part of the charging circuit;
s2, detecting the battery pack A and judging whether the connection state of the battery pack A is normal or not;
s3, if the battery pack a is normally accessed, starting the front-end input buffer module 21, and after delaying for a first preset time period, closing the rear-end output identification module 3;
s4, measuring whether the charging voltage of the battery pack A is matched with the charging requirement;
s5, if the charging voltage of the battery pack a matches the charging requirement, detecting whether the front-end input buffer module 21 completes the buffering operation;
and S6, if the front-end buffer module finishes the buffer work, closing the front-end buffer module, and starting the charging circuit B of the battery pack A to enter the charging work.
Preferably, the method further comprises: and if the charging voltage of the battery pack A does not match the charging requirement, resetting the system.
In this embodiment, after the battery pack a is correctly connected to the circuit, the system initializes various parameters, closes the front-end high-voltage circuit and the output control circuit of the charging circuit, detects the connection state of the battery pack, confirms that the output voltage is stable and does not attenuate, starts the front-end input buffer module if the battery pack is normally connected, delays for 1S, and closes the output end thyristor in the rear-end output identification module to make the voltage of the battery pack and the voltage of the output filter capacitor completely equal, and then measures whether the battery voltage matches the charging requirement, and the system resets if the battery voltage does not match the charging requirement; when the requirement is met, detecting whether the buffering of the front-end input buffering module is finished; under the normal condition, through earlier stage 2s time, the buffering is almost accomplished, and closed front end input buffer module's bidirectional thyristor closes this moment, closes front end input buffer module, starts charging circuit.
In summary, the intelligent charging protection system for the battery pack a provided by the present invention includes a front-end input buffer module 21 and a rear-end output identification module 3; the back end output identification module 3 comprises a processor 1 and a back end output identification module 3; the rear-end output identification module 3 is respectively electrically connected with the processor 1 and the battery pack A; the front-end input buffer module 21 is electrically connected with a switching power supply of the battery pack A; the front-end input buffer module 21 is used for realizing spark-free starting of the switch unit and reducing standby loss; the rear-end output identification module 3 is used for judging whether the output voltage of the battery pack a is in a stable state. Therefore, the invention can effectively inhibit the transient current when the high-voltage filter capacitor is electrified at the input end, realizes the slow charging of the load battery to the output filter capacitor at the output end, has the function of preventing reverse connection, eliminates the phenomenon of arc ignition at the two ends, and improves the efficiency and the safety of the charging protection of the battery pack.
The above detailed description is made on the intelligent charging protection system and method of the battery pack a provided by the present invention, and a specific example is applied in the present document to explain the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be a change in the specific implementation and application scope, and in summary, the content of the present specification is only an implementation of the present invention, and not a limitation to the scope of the present invention, and all equivalent structures or equivalent flow transformations made by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention. And should not be construed as limiting the invention.
Claims (8)
1. An intelligent charging protection system for a battery pack, comprising: the system comprises a processor, a front-end input buffer module and a rear-end output identification module; the rear-end output identification module is electrically connected with the processor and the battery pack respectively; the front-end input buffer module is electrically connected with a charging circuit of the battery pack; the front-end input buffer module is used for realizing spark-free starting of a switching power supply in the charging circuit; the rear-end output identification module is used for judging whether the output voltage of the battery pack is in a stable state.
2. The intelligent charging protection system for a battery pack of claim 1, further comprising a feedback loop control module; the feedback loop control module is electrically connected with the battery pack and the rear-end output identification module respectively, and is used for controlling the output voltage of the battery pack within a preset range.
3. The intelligent charging protection system for a battery pack according to claim 1, further comprising a monitoring module; the monitoring module is respectively electrically connected with the processor and the front-end input buffer module; the monitoring module is used for detecting whether the front-end input buffer module works normally or not.
4. The intelligent charging protection system of claim 2, wherein the feedback loop control module comprises a control unit, a main feedback unit and an auxiliary feedback unit; the main feedback unit is electrically connected with the control unit and the rear-end output identification module respectively, and the auxiliary feedback unit is electrically connected with the control unit and the rear-end output identification module respectively.
5. The intelligent charging protection system of a battery pack according to claim 1, wherein the front-end input buffer module comprises a first optocoupler, a second optocoupler, a third optocoupler, a triac, a common-mode inductor, a rectifier bridge, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; the first end of the first resistor is electrically connected with an alternating current input end, the first end of the bidirectional thyristor and the first end of the first optical coupler respectively, the second end of the first resistor is electrically connected with the first end of the second optical coupler and the second end of the bidirectional thyristor respectively, the second end of the second optical coupler is electrically connected with the third end of the bidirectional thyristor, the second end of the first optical coupler, the first end of the common mode inductor and the first end of the first capacitor respectively, the third end of the first optical coupler is electrically connected with the first end of the processor, the fourth end of the first optical coupler is electrically connected with the second end of the processor, the third end of the second optical coupler is electrically connected with the third end of the processor, the fourth end of the second optical coupler is grounded, and the second end of the common mode inductor is electrically connected with the alternating current input end and the second end of the first capacitor respectively, the third end of common mode inductance respectively with the first end of second electric capacity the first end electricity of rectifier bridge is connected, the second end of second electric capacity with the first end electricity of third electric capacity is connected, the second end of third electric capacity respectively with the fourth end of common mode inductance reaches the second end electricity of rectifier bridge is connected, the third end of rectifier bridge respectively with the first end of fourth electric capacity reaches the first end electricity of third opto-coupler, the second end of fourth electric capacity respectively with the fourth end of rectifier bridge the first end of second resistance and power input end electricity are connected, the first end of second resistance with the second end electricity of third opto-coupler is connected, the third end of third opto-coupler with the first end electricity of treater is connected, the fourth end ground connection of third opto-coupler.
6. The intelligent charging protection system of a battery pack according to claim 1, wherein the back-end output identification module comprises a three-terminal regulator, a thyristor, a diode, a fifth capacitor, a sixth capacitor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor; the first end of the three-terminal regulator is respectively electrically connected with the first end of a third resistor, the first end of a fifth capacitor and the anode of a battery pack, the second end of the third resistor is electrically connected with the first end of a fourth resistor, the second end of the fourth resistor is respectively electrically connected with the first end of the fifth resistor and the first end of a sixth resistor, the second end of the fifth resistor is respectively electrically connected with the first end of the sixth capacitor and the fourth end of the processor, the second end of the three-terminal regulator is electrically connected with the fifth end of the processor, the cathode of the battery pack is respectively electrically connected with the first end of a seventh resistor and the first end of the controllable silicon, the second end of the controllable silicon is electrically connected with the first end of an eighth resistor, the second end of the eighth resistor is electrically connected with the sixth end of the processor, and the third end of the controllable silicon is respectively electrically connected with the first end of a ninth resistor, and the second end of the eighth resistor is electrically connected with the first end of the diode, and the second end of the diode, the second end of the ninth resistor, the second end of the third resistor and the third end of the three-terminal regulator are grounded.
7. An intelligent charging protection method for a battery pack, comprising the intelligent charging protection system for a battery pack according to any one of claims 1 to 5, the method comprising:
initializing a control system, and closing a front-end high-voltage circuit part and a rear-end control circuit part of the charging circuit;
detecting a battery pack and judging whether the connection state of the battery pack is normal or not;
if the battery pack is normally accessed, starting the front-end input buffer module, and closing the rear-end output identification module after delaying for a first preset time period;
measuring whether the charging voltage of the battery pack matches a charging requirement;
if the charging voltage of the battery pack is matched with the charging requirement, detecting whether the front-end input buffer module finishes the buffer work;
and if the front-end buffer module finishes the buffer work, closing the front-end buffer module, and starting a charging circuit of the battery pack to enter the charging work.
8. The intelligent charging protection method of a battery pack according to claim 7, further comprising: and if the charging voltage of the battery pack does not match the charging requirement, resetting the system.
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| CN112421710B (en) | 2024-07-26 |
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