CN216146104U - Direct current conversion control circuit and device based on battery charging and discharging management - Google Patents
Direct current conversion control circuit and device based on battery charging and discharging management Download PDFInfo
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- CN216146104U CN216146104U CN202023145174.7U CN202023145174U CN216146104U CN 216146104 U CN216146104 U CN 216146104U CN 202023145174 U CN202023145174 U CN 202023145174U CN 216146104 U CN216146104 U CN 216146104U
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Abstract
The utility model discloses a DC conversion control circuit and a device based on battery charging and discharging management, the DC conversion control circuit based on battery charging and discharging management comprises: the device comprises a direct current stabilized power supply, a mode selection module, a bidirectional conversion control module, a battery and a constant current control module; the direct-current stabilized power supply is electrically connected with the mode selection module, the mode selection module is electrically connected with the bidirectional conversion control module, and the bidirectional conversion module and the constant current control module are electrically connected with the battery; the bidirectional conversion control module comprises a Boost unit, a discharge control unit, a BUCK voltage reduction unit and a charge control unit; the Boost unit is respectively and electrically connected with the mode selection module and the discharge control unit, the BUCK unit is respectively and electrically connected with the mode selection module and the charge control unit, and the discharge control unit and the charge control unit are respectively and electrically connected with the battery. The utility model can effectively save resources.
Description
Technical Field
The utility model relates to the technical field of battery management, in particular to a direct current conversion control circuit and a direct current conversion control device based on battery charging and discharging management.
Background
With the popularization of electric automobile technology and the development of some green energy power generation technologies such as wind energy, solar energy and the like, the demand on the bidirectional DC-DC converter can be greatly increased. The bidirectional DC-DC power supply is developed in the directions of large current, adjustable output voltage, high precision, small size, light weight and the like. In the prior art, the lithium battery formation equipment is charged by a charging power supply, and is discharged in a mode of connecting resistors in parallel at two ends of the charging power supply, so that the energy of the battery is completely consumed on the resistors. Although the formation equipment has low cost and simple structure and is easy to realize, the formation equipment is a phenomenon of energy waste from the viewpoint of energy conservation. Therefore, the present invention is directed to a dc conversion control circuit based on battery charging and discharging management, which is a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a dc conversion control circuit and device based on battery charging and discharging management, which overcome the above-mentioned drawbacks of the prior art.
In a first aspect, the utility model discloses a direct current conversion control circuit based on battery charging and discharging management, which comprises a direct current stabilized power supply, a mode selection module, a bidirectional conversion control module, a battery and a constant current control module; the direct-current stabilized power supply is electrically connected with the mode selection module, the mode selection module is electrically connected with the bidirectional conversion control module, and the bidirectional conversion module and the constant current control module are electrically connected with the battery; the bidirectional conversion control module comprises a Boost unit, a discharge control unit, a BUCK voltage reduction unit and a charge control unit; the Boost unit is respectively and electrically connected with the mode selection module and the discharge control unit, the BUCK unit is respectively and electrically connected with the mode selection module and the charge control unit, and the discharge control unit and the charge control unit are respectively and electrically connected with the battery.
Preferably, the battery charge-discharge management-based direct current conversion control circuit further comprises an overcharge prevention module, and the overcharge prevention module is electrically connected with the charge control unit and the battery respectively.
Preferably, the BUCK unit includes a first control subunit and a BUCK subunit; the BUCK voltage reduction subunit is electrically connected with the mode selection module and the charging control unit respectively, and the first control subunit is electrically connected with the BUCK voltage reduction subunit.
Preferably, the Boost unit comprises a second control subunit and a Boost subunit; the Boost sub-unit is electrically connected with the mode selection module and the discharge control unit respectively, and the second control unit is electrically connected with the Boost sub-unit.
Preferably, the mode selection module comprises a first comparator, a logic unit, a first resistor and a second resistor; the first end of the first resistor is electrically connected with the direct-current stabilized voltage power supply, the second end of the first resistor is electrically connected with the positive phase input end of the first comparator and the first end of the second resistor respectively, the negative phase input end of the first comparator is a reference voltage input end, the second end of the second resistor is grounded, the output end of the first comparator is electrically connected with the Boost unit and the input end of the logic unit respectively, and the output end of the logic unit is electrically connected with the BUCK voltage reduction unit.
Preferably, the overcharge prevention module comprises a second comparator, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a first diode and a second diode; a first end of the third resistor is electrically connected with the battery, a second end of the third resistor is respectively electrically connected with a first end of the first capacitor, a first end of the fourth resistor, a first end of the first diode and a non-inverting input end of the second comparator, a second end of the first capacitor and a second end of the fourth resistor are grounded, a first end of the fifth resistor and a first end of the sixth resistor are respectively and electrically connected with an inverting input end of the second comparator, the second end of the fifth resistor is a reference voltage input end, the second end of the sixth resistor is grounded, the output end of the second comparator is respectively and electrically connected with the second end of the first diode and the first end of the second diode, the second end of the second diode is electrically connected with the first end of the seventh resistor, and the second end of the seventh resistor is electrically connected with the BUCK voltage reduction unit.
In a second aspect, the present invention discloses a dc conversion control device based on battery charging and discharging management, including the dc conversion control circuit based on battery charging and discharging management of the first aspect.
The direct current conversion control circuit based on battery charge and discharge management has the following beneficial effects that: the device comprises a direct current stabilized power supply, a mode selection module, a bidirectional conversion control module, a battery and a constant current control module; the direct-current stabilized power supply is electrically connected with the mode selection module, the mode selection module is electrically connected with the bidirectional conversion control module, and the bidirectional conversion module and the constant current control module are electrically connected with the battery; the bidirectional conversion control module comprises a Boost unit, a discharge control unit, a BUCK voltage reduction unit and a charge control unit; the Boost unit is respectively and electrically connected with the mode selection module and the discharge control unit, the BUCK unit is respectively and electrically connected with the mode selection module and the charge control unit, and the discharge control unit and the charge control unit are respectively and electrically connected with the battery. The direct current stabilized power supply is used for providing voltage input; when the battery supplies power to a load, the discharge control unit controls the Boost unit to work, and when the battery is insufficient in electric quantity, the charge control unit controls the BUCK voltage reduction unit to work; the mode selection module is used for acquiring the voltage of the battery and comparing the voltage with a reference voltage so as to realize the switching of a battery charging mode and a battery discharging mode; the constant current control module is used for realizing constant current control of the charging current. The utility model can realize the reliable conversion of the charging mode and the discharging mode, replaces the traditional mode of consuming the discharging current on the resistor, and avoids the waste of energy. Therefore, the utility model can effectively save resources.
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 a dc conversion control circuit based on battery charging/discharging management according to a preferred embodiment of the present invention;
fig. 2 is a schematic block diagram of a dc conversion control circuit based on battery charging/discharging management according to another preferred embodiment of the present invention;
FIG. 3 is a circuit diagram of a mode selection module of a DC conversion control circuit based on battery charging/discharging management according to a preferred embodiment of the present invention;
fig. 4 is a circuit diagram of an overcharge protection module of a dc conversion control circuit based on battery charging/discharging management according to a preferred embodiment of the utility model.
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 dc regulated power supply 1, a mode selection module 2, a bidirectional conversion control module 3, a battery 4 and a constant current control module 5; the direct-current stabilized power supply 1 is electrically connected with the mode selection module 2, the mode selection module 2 is electrically connected with the bidirectional conversion control module 3, and the bidirectional conversion module 3 and the constant current control module 5 are electrically connected with the battery 4; the bidirectional conversion control module 3 comprises a Boost unit 31, a discharge control unit 32, a BUCK voltage reduction unit 33 and a charge control unit 34; the Boost unit 31 is electrically connected to the mode selection module 2 and the discharge control unit 32, the BUCK unit 33 is electrically connected to the mode selection module 2 and the charge control unit 34, and the discharge control unit 32 and the charge control unit 34 are electrically connected to the battery 4. The direct current stabilized power supply 1 is used for providing voltage input; when the battery 4 supplies power to a load, the discharge control unit 32 controls the Boost unit 31 to work, and when the battery 4 is insufficient in electric quantity, the charge control unit 34 controls the BUCK voltage-reducing unit 33 to work; the mode selection module 2 is used for collecting the voltage of the battery and comparing the voltage with a reference voltage, so that the switching between a battery charging mode and a battery discharging mode is realized; the constant current control module 5 is used for realizing constant current control of the charging current. The utility model can realize the reliable conversion of the charging mode and the discharging mode, replaces the traditional mode of consuming the discharging current on the resistor, and avoids the waste of energy. Therefore, the utility model can effectively save resources.
Preferably, referring to fig. 2, the dc conversion control circuit based on battery charging and discharging management further includes an anti-overcharge module 6, and the anti-overcharge module 6 is electrically connected to the charging control unit 34 and the battery 4, respectively.
Preferably, the BUCK unit 33 includes a first control subunit 331 and a BUCK voltage subunit 332; the BUCK voltage sub-unit 332 is electrically connected to the mode selection module 2 and the charging control unit 34, respectively, and the first control sub-unit 331 is electrically connected to the BUCK voltage sub-unit 332. In this embodiment, the first control subunit 331 is configured to implement control over the BUCK voltage reducing subunit 332, and a chip model of the first control subunit 331 is SG 3525.
Preferably, the Boost unit 31 includes a second control subunit 311 and a Boost subunit 312; the Boost sub-unit 312 is electrically connected to the mode selection module 2 and the discharge control unit 32, respectively, and the second control unit 311 is electrically connected to the Boost sub-unit 312. In this embodiment, the second control subunit 311 is configured to implement control over the Boost boosting subunit 312, and a chip model of the second control subunit 311 is US 3843.
Preferably, referring to fig. 3, the mode selection module 2 includes a first comparator U1, a logic unit U2, a first resistor R18 and a second resistor R24; a first end of the first resistor R18 is electrically connected to the dc regulated power supply 1, a second end of the first resistor R18 is electrically connected to a positive-phase input terminal of the first comparator U1 and a first end of the second resistor R24, an inverting input terminal of the first comparator U1 is a reference voltage input terminal, a second end of the second resistor R24 is grounded, an output terminal of the first comparator U1 is electrically connected to the Boost subunit 312 and the input terminal of the logic unit U2, and an output terminal of the logic unit U2 is electrically connected to the BUCK subunit 332. It can be understood that, in this embodiment, the first comparator U1 collects the voltage of the dc voltage regulator and then compares the voltage with a reference voltage, and the output terminal is connected to the logic unit U2 to select the charge/discharge mode, and if the voltage is higher than the reference voltage, the charging mode is entered, otherwise, the discharging mode is entered.
Preferably, referring to fig. 4, the overcharge prevention module 6 includes a second comparator U3, a third resistor R1, a fourth resistor R4, a fifth resistor R3, a sixth resistor R5, a seventh resistor R2, a first capacitor C1, a first diode D1, and a second diode D2; a first end of the third resistor R1 is electrically connected to the battery 4, a second end of the third resistor R1 is electrically connected to a first end of the first capacitor C1, a first end of the fourth resistor R4, a first end of the first diode D1 and a non-inverting input end of the second comparator U3, respectively, a second end of the first capacitor C1 and a second end of the fourth resistor R4 are grounded, a first end of the fifth resistor R3 and a first end of the sixth resistor R5 are electrically connected to an inverting input end of the second comparator U3, respectively, a second end of the fifth resistor R3 is a reference voltage input end, a second end of the sixth resistor R5 is grounded, an output end of the second comparator U3 is electrically connected to a second end of the first diode D1 and a first end of the second diode D2, respectively, a second end of the second diode D2 is electrically connected to a first end of the seventh resistor R2, a second end of the seventh resistor R2 is electrically connected to the BUCK unit 33. It can be understood that, in this embodiment, the second comparator U3 divides the collected output voltage U1, compares the divided voltage with the reference voltage, and outputs a high level if the divided voltage is higher than the reference voltage, and sends the high level to the enable pin of the control module to turn off the chip; and front and rear stages of the second comparator U3 are connected with diodes to realize voltage clamping, so that the off state of the chip is kept.
Example two
The utility model also discloses a direct current conversion control device based on battery charge and discharge management, which comprises the direct current conversion control circuit based on battery charge and discharge management in the first embodiment.
In summary, the dc conversion control circuit based on battery charging/discharging management provided by the present invention includes a dc voltage-stabilized power supply 1, a mode selection module 2, a bidirectional conversion control module 3, a battery 4 and a constant current control module 5; the direct-current stabilized power supply 1 is electrically connected with the mode selection module 2, the mode selection module 2 is electrically connected with the bidirectional conversion control module 3, and the bidirectional conversion module and the constant current control module 5 are electrically connected with the battery 4; the bidirectional conversion control module 3 comprises a Boost unit 31, a discharge control unit 32, a BUCK voltage reduction unit 33 and a charge control unit 34; the Boost unit 31 is electrically connected to the mode selection module 2 and the discharge control unit 32, the BUCK unit 33 is electrically connected to the mode selection module 2 and the charge control unit 34, and the discharge control unit 32 and the discharge control unit 34 are electrically connected to the battery 4. The direct current stabilized power supply 1 is used for providing voltage input; when the battery 4 supplies power to a load, the discharge control unit 32 controls the Boost unit 31 to work, and when the battery 4 is insufficient in electric quantity, the charge control unit 34 controls the BUCK voltage-reducing unit 33 to work; the mode selection module 2 is used for collecting the voltage of the battery and comparing the voltage with a reference voltage, so that the switching between a battery charging mode and a battery discharging mode is realized; the constant current control module 5 is used for realizing constant current control of the charging current. The utility model can realize the reliable conversion of the charging mode and the discharging mode, replaces the traditional mode of consuming the discharging current on the resistor, and avoids the waste of energy. Therefore, the utility model can effectively save resources.
The dc conversion control circuit and the dc conversion control device based on battery charging and discharging management provided by the present invention are introduced in detail, and a specific example is applied in the present document to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; 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 utility model.
Claims (7)
1. A DC conversion control circuit based on battery charge and discharge management is characterized by comprising: the device comprises a direct current stabilized power supply, a mode selection module, a bidirectional conversion control module, a battery and a constant current control module; the direct-current stabilized power supply is electrically connected with the mode selection module, the mode selection module is electrically connected with the bidirectional conversion control module, and the bidirectional conversion module and the constant current control module are electrically connected with the battery; the bidirectional conversion control module comprises a Boost unit, a discharge control unit, a BUCK voltage reduction unit and a charge control unit; the Boost unit is respectively and electrically connected with the mode selection module and the discharge control unit, the BUCK unit is respectively and electrically connected with the mode selection module and the charge control unit, and the discharge control unit and the charge control unit are respectively and electrically connected with the battery.
2. The battery charging and discharging management-based direct current conversion control circuit according to claim 1, further comprising an anti-overcharge module, wherein the anti-overcharge module is electrically connected to the charging control unit and the battery respectively.
3. The direct current conversion control circuit based on battery charging and discharging management of claim 1, wherein the BUCK voltage reduction unit comprises a first control subunit and a BUCK voltage reduction subunit; the BUCK voltage reduction subunit is electrically connected with the mode selection module and the charging control unit respectively, and the first control subunit is electrically connected with the BUCK voltage reduction subunit.
4. The battery charging and discharging management-based direct current conversion control circuit according to claim 1, wherein the Boost voltage boosting unit comprises a second control subunit and a Boost voltage boosting subunit; the Boost sub-unit is electrically connected with the mode selection module and the discharge control unit respectively, and the second control sub-unit is electrically connected with the Boost sub-unit.
5. The battery charging and discharging management-based direct current conversion control circuit according to claim 1, wherein the mode selection module comprises a first comparator, a logic unit, a first resistor and a second resistor; the first end of the first resistor is electrically connected with the direct-current stabilized voltage power supply, the second end of the first resistor is electrically connected with the positive phase input end of the first comparator and the first end of the second resistor respectively, the negative phase input end of the first comparator is a reference voltage input end, the second end of the second resistor is grounded, the output end of the first comparator is electrically connected with the Boost unit and the input end of the logic unit respectively, and the output end of the logic unit is electrically connected with the BUCK voltage reduction unit.
6. The battery charging and discharging management-based direct current conversion control circuit according to claim 2, wherein the anti-overcharge module comprises a second comparator, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a first diode and a second diode; a first end of the third resistor is electrically connected with the battery, a second end of the third resistor is respectively electrically connected with a first end of the first capacitor, a first end of the fourth resistor, a first end of the first diode and a non-inverting input end of the second comparator, a second end of the first capacitor and a second end of the fourth resistor are grounded, a first end of the fifth resistor and a first end of the sixth resistor are respectively and electrically connected with an inverting input end of the second comparator, the second end of the fifth resistor is a reference voltage input end, the second end of the sixth resistor is grounded, the output end of the second comparator is respectively and electrically connected with the second end of the first diode and the first end of the second diode, the second end of the second diode is electrically connected with the first end of the seventh resistor, and the second end of the seventh resistor is electrically connected with the BUCK voltage reduction unit.
7. A dc conversion control device based on battery charging and discharging management, characterized in that the dc conversion control device based on battery charging and discharging management comprises a dc conversion control circuit based on battery charging and discharging management according to any one of claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023145174.7U CN216146104U (en) | 2020-12-23 | 2020-12-23 | Direct current conversion control circuit and device based on battery charging and discharging management |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023145174.7U CN216146104U (en) | 2020-12-23 | 2020-12-23 | Direct current conversion control circuit and device based on battery charging and discharging management |
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| CN216146104U true CN216146104U (en) | 2022-03-29 |
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