CN219458669U - Anti-surge protection circuit - Google Patents
Anti-surge protection circuit Download PDFInfo
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- CN219458669U CN219458669U CN202320566960.9U CN202320566960U CN219458669U CN 219458669 U CN219458669 U CN 219458669U CN 202320566960 U CN202320566960 U CN 202320566960U CN 219458669 U CN219458669 U CN 219458669U
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Abstract
The utility model relates to an anti-surge protection circuit, it includes DC/DC conversion module, one-level anti-surge module and second grade anti-surge module, DC/DC conversion module establishes ties between equipment end and group battery, one-level anti-surge module establishes ties between DC/DC conversion module and the equipment end, second grade anti-surge module establishes ties between DC/DC conversion module and group battery, DC/DC conversion module is configured to direct current or to direct current that the group battery provided the equipment end, one-level anti-surge module is configured to direct current or input that the equipment end provided the equipment end carries out voltage filtering processing, second grade anti-surge module is configured to direct current or input that the group battery provided the group battery carries out voltage filtering processing. The protection effect to battery and circuit equipment end is improved to this application.
Description
Technical Field
The application relates to the technical field of lithium batteries, in particular to an anti-surge protection circuit.
Background
At present, with the continuous appearance of new materials, the lithium battery technology will continue to develop and mature, and by virtue of the excellent performance, the high-capacity high-power lithium battery will have wider application prospects in various fields. The capacity requirement of the lithium battery is higher and higher, the power of a conversion circuit at a corresponding charging and discharging equipment end is higher and higher, stable voltage and current are required to be achieved after the power of the conversion circuit is increased, filter capacitors at an input end and an output end of the circuit are also required to be increased correspondingly, and the instant surge current generated by the larger the filter capacitors is also increased correspondingly due to the capacitive properties of the filter capacitors.
However, the surge current not only can damage the components and circuit boards inside the electronic equipment end, but also can cause battery interference and damage to the power grid facilities, the circuit can generate great surge current at the moment of being connected, and great current impact is generated on the battery, the electronic element and the interface terminal, so that the battery, the interface terminal and the switch circuit power devices are greatly damaged, the protection effect on the battery and the circuit equipment end is poor, the reliability and the service life of the product are seriously affected, and the situation needs to be improved.
Disclosure of Invention
In order to improve the protection effect to battery and circuit equipment end, this application provides an anti surge protection circuit.
The application provides an anti surge protection circuit adopts following technical scheme:
an anti-surge protection circuit comprising: the DC/DC conversion module is connected in series between the equipment end and the battery pack and is configured to perform direct current conversion on direct current provided by the equipment end or direct current provided by the battery pack; the primary anti-surge module is connected in series between the DC/DC conversion module and the equipment end and is configured to perform voltage filtering treatment on direct current provided by the equipment end or direct current input into the equipment end; the secondary anti-surge module is connected in series between the DC/DC conversion module and the battery pack, and is configured to perform voltage filtering processing on direct current provided by the battery pack or direct current input into the battery pack.
By adopting the technical scheme, when the equipment end charges the battery pack, current firstly flows to the DC/DC conversion module after passing through the primary anti-surge module, so that the generation of larger surge current to the DC/DC conversion module by the equipment end can be reduced, the DC/DC conversion module converts direct current provided by the equipment end into direct current required by the battery pack, then charges the battery pack after passing through the secondary anti-surge module, and the secondary anti-surge module can play a role in inhibiting the surge current generated by the DC/DC conversion module during starting up; if the battery pack charges the equipment end, current flows to the DC/DC conversion module after passing through the secondary anti-surge module, so that the battery pack can be reduced to generate larger surge current for the DC/DC conversion module, the DC/DC conversion module can convert direct current provided by the battery pack into direct current required by the equipment end, and surge current impact on the equipment end is reduced through buffering of the primary anti-surge module.
Optionally, the device further comprises an MCU control module, wherein the MCU control module is respectively connected with the DC/DC conversion module, the primary anti-surge module and the secondary anti-surge module.
By adopting the technical scheme, the MCU control module can be used for carrying out different combination control on different application occasions, and can judge different situations of charging or electricity consumption of the equipment end, and the like, and carry out different combination control on the primary anti-surge module, the secondary anti-surge module and the DC/DC conversion module.
Optionally, the first-stage anti-surge module comprises a first anti-surge unit and a first filtering unit, the first anti-surge unit and the first filtering unit are connected in series, the first anti-surge unit is connected with the positive electrode of the equipment end, and the first filtering unit is connected with the negative electrode of the equipment end; the connection node between the first anti-surge unit and the first filtering unit is connected with the DC/DC conversion module for inputting current into the DC/DC conversion module or receiving current transmitted from the DC/DC conversion module.
Through adopting above-mentioned technical scheme, when equipment end charges to the group battery, the electric current flows to first filter unit after first anti surge unit earlier, can reduce equipment end and produce great surge current to first filter unit, and charging voltage forms steady voltage current after first filter unit filters, adjusts into the required charging voltage and the electric current of group battery through DC/DC conversion module again.
Optionally, the first anti-surge unit comprises a first resistor and a relay, wherein the first resistor is connected in parallel with a switch end of the relay, and a coil end of the relay is connected in series between the MCU control module and a ground wire.
Through adopting above-mentioned technical scheme, when equipment end charges, because the impedance of first resistor itself can reduce surge current when the start, the delay after a period of time turns on, and the circuit gets into normal operating condition and can not produce unnecessary loss to the circuit after first resistor is short-circuited, through setting up first anti surge unit in the circuit, can reduce the equipment end and to the great surge current of production of first filter unit.
Optionally, the first filtering unit includes a first capacitor, one end of the first capacitor is connected with the first anti-surge unit, and the other end of the first capacitor is connected with the equipment end.
Through adopting above-mentioned technical scheme, first condenser has filtering and energy storage's effect, and when equipment end was charged to the group battery, charging voltage formed steady voltage current after first filter unit filtering.
Optionally, the second-stage anti-surge module includes a second anti-surge unit and a second filtering unit, the second anti-surge unit is connected in series with the second filtering unit, the second anti-surge unit and the second filtering unit are both connected with the DC/DC conversion module, the second anti-surge unit is also connected with the negative electrode of the battery pack, and the second filtering unit is also connected with the positive electrode of the battery pack.
By adopting the technical scheme, the voltage and the current converted by the DC/DC conversion module firstly pass through the second anti-surge unit and then pass through the second filtering unit, and the second anti-surge unit can inhibit the surge current generated by the DC/DC conversion module due to the second filtering unit during starting up, and the converted voltage and current charge the battery pack through the second filtering unit.
Optionally, the second anti-surge unit includes a second resistor and a MOS tube, a source of the MOS tube is connected to the DC/DC conversion module, a drain of the MOS tube is connected to the second filtering unit, a gate of the MOS tube is connected to the MCU control module, one end of the second resistor is connected to the source of the MOS tube, and the other end of the second resistor is connected to the drain of the MOS tube.
Through adopting above-mentioned technical scheme, the current of second filter unit is to DC/DC conversion module behind the second resistor, because the impedance of second resistor itself to reduce DC/DC conversion module because of the surge current that second filter unit produced, the MOS pipe switches on after the delay of a period, and the second resistor is by the short circuit, and the circuit gets into normal operating condition, and the current voltage after the DC/DC conversion charges for the group battery through MOS pipe, second filter unit in proper order.
Optionally, the second filtering unit includes a second capacitor, one end of the second capacitor is connected with the DC/DC conversion module, and the other end of the second capacitor is connected with the second anti-surge unit.
Through adopting above-mentioned technical scheme, the second condenser has filtering and energy storage's effect, and charging voltage is after DC/DC conversion module conversion, forms steady voltage current after the filtering of second filter unit and charges to the group battery.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the equipment end charges the battery pack, current flows to the DC/DC conversion module after passing through the primary anti-surge module, so that the equipment end can be reduced to generate larger surge current for the DC/DC conversion module, the DC/DC conversion module can convert direct current provided by the equipment end into direct current required by the battery pack, then the battery pack is charged after passing through the secondary anti-surge module, and the secondary anti-surge module can play a role in inhibiting the surge current generated by the DC/DC conversion module during starting.
2. If the battery pack charges the equipment end, current flows to the DC/DC conversion module after passing through the secondary anti-surge module, so that the battery pack can be reduced to generate larger surge current for the DC/DC conversion module, the DC/DC conversion module can convert direct current provided by the battery pack into direct current required by the equipment end, and surge current impact on the equipment end is reduced through buffering of the primary anti-surge module.
3. The MCU control module can be used for carrying out different combination control on different application occasions, can judge different situations such as charging or electricity consumption of the equipment end, and carries out different combination control on the primary anti-surge module, the secondary anti-surge module and the DC/DC conversion module.
Drawings
FIG. 1 is a system block diagram of an anti-surge protection circuit;
fig. 2 is a schematic circuit diagram of an anti-surge protection circuit.
Reference numerals illustrate:
1. a DC/DC conversion module; 2. an equipment end; 3. a battery pack; 4. a primary anti-surge module; 41. a first anti-surge unit; 42. a first filtering unit; 5. a secondary anti-surge module; 51. a second anti-surge unit; 52. a second filtering unit; 6. and the MCU control module.
Detailed Description
Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.
"connected" in the present utility model encompasses both direct and indirect connections, such as those made through some active device, passive device, or electrically conductive medium; connections through other active or passive devices, such as through switches, follower circuits, etc. circuits or components, may be included as known to those skilled in the art, on the basis of achieving the same or similar functional objectives.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs
The embodiment of the application discloses an anti-surge protection circuit. Referring to fig. 1 and 2, the device comprises a DC/DC conversion module 1, a primary anti-surge module 4, a secondary anti-surge module 5, and an MCU control module 6, wherein the DC/DC conversion module 1 is connected in series between the device end 2 and the battery pack 3, the primary anti-surge module 4 is connected in series between the DC/DC conversion module 1 and the device end 2, the secondary anti-surge module 5 is connected in series between the DC/DC conversion module 1 and the battery pack 3, and the MCU control module 6 is connected with the DC/DC conversion module 1, the primary anti-surge module 4, and the secondary anti-surge module 5, respectively. The DC/DC conversion module 1 is configured to perform DC conversion on the DC power supplied from the device side 2 or the DC power supplied from the battery pack 3, the primary anti-surge module 4 is configured to perform voltage filtering on the DC power supplied from the device side 2 or the DC power inputted to the device side 2, and the secondary anti-surge module 5 is configured to perform voltage filtering on the DC power supplied from the battery pack 3 or the DC power inputted to the battery pack 3.
In this embodiment of the application, when the device end 2 charges the battery pack 3, the current flows to the DC/DC conversion module 1 after passing through the primary anti-surge module 4, so that the device end 2 can be reduced to generate larger surge current to the DC/DC conversion module 1, the DC/DC conversion module 1 converts the direct current provided by the device end 2 into direct current required by the battery pack 3, and then charges the battery pack 3 after passing through the secondary anti-surge module 5, and the secondary anti-surge module 5 can play a role in inhibiting the surge current generated by the DC/DC conversion module 1 during startup. If the battery pack 3 charges the equipment end 2, the current flows to the DC/DC conversion module 1 after passing through the secondary anti-surge module 5, so that the battery pack 3 can be reduced to generate larger surge current for the DC/DC conversion module 1, the DC/DC conversion module 1 can convert the direct current provided by the battery pack 3 into direct current required by the equipment end 2, then the surge current impact on the equipment end 2 is reduced through the buffering of the primary anti-surge module 4, different combination control can be performed for different application occasions by using the MCU control module, different situations such as charging or electricity consumption of the equipment end 2 can be judged, and different combination control is performed for the primary anti-surge module 4, the secondary anti-surge module 5 and the DC/DC conversion module 1. The protection effect on the battery and the circuit equipment end 2 can be improved by adopting the dual anti-surge circuit in the scheme.
Referring to fig. 2, the primary anti-surge module 4 includes a first anti-surge unit 41 and a first filter unit 42, the first anti-surge unit 41 and the first filter unit 42 are connected in series, the first anti-surge unit 41 is connected with the positive electrode of the equipment terminal 2, and the first filter unit 42 is connected with the negative electrode of the equipment terminal 2; a connection node between the first anti-surge unit 41 and the first filtering unit 42 is connected with the DC/DC conversion module 1 for inputting a current into the DC/DC conversion module 1 or receiving a current transmitted from the DC/DC conversion module 1; the first anti-surge unit 41 includes a first resistor R1 and a relay, the first resistor R1 is connected in parallel to a switching end of the relay, a coil end of the relay is connected in series between the MCU control module 6 and the ground, the first filter unit 42 includes a first capacitor C1, one end of the first capacitor C1 is connected to the first anti-surge unit 41, and the other end of the first capacitor C1 is connected to the device end 2.
In the embodiment of the present application, when the device end 2 charges the battery pack 3, the current passes through the first anti-surge unit 41, and due to the impedance of the first resistor R1, the surge current can be reduced when the device is started, the relay is turned on after a period of delay, the circuit enters a normal working state, and unnecessary loss of the circuit is not generated after the first resistor R1 is shorted; and then flows to the first capacitor C1, the charging voltage is filtered by the first capacitor C1 to form stable voltage and current, so that the device end 2 can reduce the larger surge current generated on the first capacitor C1, and then the charging voltage and current required by the battery pack 3 are regulated by the DC/DC conversion module 1.
Referring to fig. 2, the secondary anti-surge module 5 includes a second anti-surge unit 51 and a second filter unit 52, the second anti-surge unit 51 and the second filter unit 52 are connected in series with the second anti-surge unit 51 and the second filter unit 52 are both connected with the DC/DC conversion module 1, the second anti-surge unit 51 is also connected with the negative electrode of the battery pack 3, and the second filter unit 52 is also connected with the positive electrode of the battery pack 3; the second anti-surge unit 51 comprises a second resistor R1 and a MOS tube Q5, wherein a source electrode of the MOS tube Q5 is connected with the DC/DC conversion module 1, a drain electrode of the MOS tube Q5 is connected with the second filtering unit 52, a grid electrode of the MOS tube Q5 is connected with the MCU control module 6, one end of the second resistor R1 is connected with the source electrode of the MOS tube Q5, and a drain electrode of the MOS tube Q5 at the other end of the second resistor R1 is connected; the second filtering unit 52 includes a second capacitor C1, one end of the second capacitor C1 is connected to the DC/DC conversion module 1, and the other end of the second capacitor C1 is connected to the second anti-surge unit 51.
In the embodiment of the application, the voltage and the current converted by the DC/DC conversion module 1 first pass through the second anti-surge unit 51, the current of the second filtering unit 52 passes through the second resistor R1 and then reaches the DC/DC conversion module 1, and the surge current generated by the DC/DC conversion module 1 due to the second filtering unit 52 is reduced due to the impedance of the second resistor R1, the MOS transistor Q5 is turned on after a period of delay, the second resistor R1 is shorted, the circuit enters a normal working state, and the current and the voltage after DC/DC conversion pass through the MOS transistor Q5 and the second capacitor C1 in sequence to charge the battery pack 3; the second anti-surge unit 51 can suppress the surge current generated by the DC/DC conversion module 1 due to the second filter unit 52 at the time of startup.
In this embodiment of the present application, when the device end 2 is used as the charging device end 2, and the device end 2 charges the battery pack 3, the charging current charges the first filtering unit 42 through the first resistor R1, and due to the impedance of the first resistor R1, the surge current can be reduced when the device is started, after a period of delay, the voltage of the first filtering unit 42 is equal to the voltage of the device end 2, the MCU control module issues an instruction, so that the relay is turned on, the first resistor R1 is shorted, the circuit enters a normal working state, the first resistor R1 is not lost after being shorted, and by setting the first anti-surge unit 41 in the circuit, the device end 2 can reduce the large surge current generated by the first filtering unit 42.
The voltage of the first filtering unit 42 is converted into the voltage required by the battery pack 3 through the DC/DC conversion module 1 and then is sent to the second filtering unit 52 and the second anti-surge unit 51, when the MCU control module outputs a low level during starting, the MOS transistor Q5 is in a cut-off state, the voltage of the second filtering unit 52 flows into the DC/DC conversion module 1 through the second resistor R1, due to the impedance of the second resistor R1, the surge current generated by the DC/DC conversion module 1 due to the second filtering unit 52 is reduced, when the voltage of the second filtering unit 52 is equal to the voltage of the battery pack 3 after a period of delay, the MCU control module 6 sends out an instruction to enable the MOS transistor Q5 to be turned on and the second resistor R1 to be short-circuited, the circuit enters a normal state, and the current flows through the second capacitor C1 by the MOS transistor Q5 to charge the battery pack 3.
In this embodiment of the present application, when the device end 2 is used as the consumer end 2 and the battery pack 3 discharges, the current in the battery pack 3 passes through the second filtering unit 52 and the second anti-surge unit 51, and when the power-on is started, the current flows into the DC/DC conversion module 1 through the second filtering unit 52 and the second resistor R1 due to the cut-off of the MOS transistor Q5, when the voltage of the second filtering unit 52 is equal to the voltage of the battery pack 3 after a period of delay, the MCU control module 6 issues an instruction, so that the MOS transistor Q5 is turned on and the second resistor R1 is shorted, the circuit enters a normal state, and the current flows through the second capacitor C1 from the MOS transistor Q5 and then enters the DC/DC conversion module 1.
The voltage of the second filtering unit 52 forms the voltage required by the equipment end 2 through the DC/DC conversion module 1, when the power-on, the MCU control module 6 sends out an instruction to enable the relay to be turned off, the voltage of the first filtering unit 42 passes through the first resistor R1 and then reaches the equipment end 2, due to the impedance of the first resistor R1, the surge current of the equipment end 2 can be reduced, after a period of delay, the voltage of the first filtering unit 42 is equal to the voltage of the equipment end 2, the power-on is started normally, the MCU control module 6 sends out an instruction to enable the relay to be turned on and R1 to be short-circuited, the voltage of the first filtering unit 42 passes through the relay and then enters the equipment end 2, the surge current can be reduced by utilizing the impedance of the resistor, the short-circuit resistor does not generate loss to the circuit during normal operation, and the power-on anti-surge protection is realized when the circuit conversion is efficient.
The implementation principle of the anti-surge protection circuit in the embodiment of the application is as follows:
when the equipment end 2 charges the battery pack 3, current flows to the DC/DC conversion module 1 after passing through the primary anti-surge module 4, so that the generation of larger surge current to the DC/DC conversion module 1 by the equipment end 2 can be reduced, the DC power provided by the equipment end 2 is converted into direct current required by the battery pack 3 by the DC/DC conversion module 1, then the battery pack 3 is charged after passing through the secondary anti-surge module 5, and the secondary anti-surge module 5 can inhibit the surge current generated by the DC/DC conversion module 1 during startup. If the battery pack 3 charges the equipment end 2, the current flows to the DC/DC conversion module 1 after passing through the secondary anti-surge module 5, so that the battery pack 3 can be reduced to generate larger surge current for the DC/DC conversion module 1, the DC/DC conversion module 1 can convert the direct current provided by the battery pack 3 into direct current required by the equipment end 2, then the surge current impact on the equipment end 2 is reduced through the buffering of the primary anti-surge module 4, different combination control can be performed for different application occasions by using the MCU control module, different situations such as charging or electricity consumption of the equipment end 2 can be judged, and different combination control is performed for the primary anti-surge module 4, the secondary anti-surge module 5 and the DC/DC conversion module 1. The protection effect on the battery and the circuit equipment end 2 can be improved by adopting the dual anti-surge circuit in the scheme.
The protection effect to battery and circuit equipment end 2 can be improved to the dual anti-surge protection circuit that adopts in this application scheme, and dual start-up surge protection circuit design when charging or discharging has better protect function to circuit power components and parts, interface terminal to reduce the surging impact of group battery 3 to play the effect that improves battery life, and can not produce extra loss to the battery, realize the high-efficient conversion of energy when charging and discharging circuit plays anti-surge.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (5)
1. An anti-surge protection circuit, comprising:
a DC/DC conversion module (1), the DC/DC conversion module (1) being connected in series between a device end (2) and a battery pack (3), the DC/DC conversion module (1) being configured to DC-convert direct current provided by the device end (2) or direct current provided by the battery pack (3);
the primary anti-surge module (4) is connected in series between the DC/DC conversion module (1) and the equipment end (2), and the primary anti-surge module (4) is configured to perform voltage filtering treatment on direct current provided by the equipment end (2) or direct current input into the equipment end (2);
a secondary anti-surge module (5), wherein the secondary anti-surge module (5) is connected in series between the DC/DC conversion module (1) and the battery pack (3), and the secondary anti-surge module (5) is configured to perform voltage filtering processing on direct current provided by the battery pack (3) or direct current input into the battery pack (3);
the system further comprises an MCU control module (6), wherein the MCU control module (6) is respectively connected with the DC/DC conversion module (1), the primary anti-surge module (4) and the secondary anti-surge module (5);
the primary anti-surge module (4) comprises a first anti-surge unit (41) and a first filtering unit (42), the first anti-surge unit (41) and the first filtering unit (42) are connected in series, the first anti-surge unit (41) is connected with the positive electrode of the equipment end (2), and the first filtering unit (42) is connected with the negative electrode of the equipment end (2); a connection node between the first anti-surge unit (41) and the first filtering unit (42) is connected with the DC/DC conversion module (1) for inputting a current into the DC/DC conversion module (1) or receiving a current transmitted from the DC/DC conversion module (1);
the secondary anti-surge module (5) comprises a second anti-surge unit (51) and a second filtering unit (52), the second anti-surge unit (51) and the second filtering unit (52) are connected in series, the second anti-surge unit (51) and the second filtering unit (52) are both connected with the DC/DC conversion module (1), the second anti-surge unit (51) is also connected with the negative electrode of the battery pack (3), and the second filtering unit (52) is also connected with the positive electrode of the battery pack (3).
2. An anti-surge protection circuit according to claim 1, characterized in that the first anti-surge unit (41) comprises a first resistor and a relay, the first resistor being connected in parallel to the switching end of the relay, the coil end of the relay being connected in series between the MCU control module (6) and ground.
3. An anti-surge protection circuit according to claim 1, characterized in that the first filter unit (42) comprises a first capacitor, one end of which is connected to the first anti-surge unit (41) and the other end of which is connected to the equipment end (2).
4. The anti-surge protection circuit according to claim 1, wherein the second anti-surge unit (51) comprises a second resistor and a MOS transistor, a source of the MOS transistor is connected to the DC/DC conversion module (1), a drain of the MOS transistor is connected to the second filtering unit (52), a gate of the MOS transistor is connected to the MCU control module (6), one end of the second resistor is connected to the source of the MOS transistor, and the other end of the second resistor is connected to the drain of the MOS transistor.
5. An anti-surge protection circuit according to claim 1, characterized in that the second filter unit (52) comprises a second capacitor, one end of which is connected to the DC/DC conversion module (1), and the other end of which is connected to the second anti-surge unit (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320566960.9U CN219458669U (en) | 2023-03-13 | 2023-03-13 | Anti-surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320566960.9U CN219458669U (en) | 2023-03-13 | 2023-03-13 | Anti-surge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219458669U true CN219458669U (en) | 2023-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320566960.9U Active CN219458669U (en) | 2023-03-13 | 2023-03-13 | Anti-surge protection circuit |
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| Country | Link |
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| CN (1) | CN219458669U (en) |
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- 2023-03-13 CN CN202320566960.9U patent/CN219458669U/en active Active
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