CN112366794A - Battery charging control device - Google Patents
Battery charging control device Download PDFInfo
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- CN112366794A CN112366794A CN202011375800.3A CN202011375800A CN112366794A CN 112366794 A CN112366794 A CN 112366794A CN 202011375800 A CN202011375800 A CN 202011375800A CN 112366794 A CN112366794 A CN 112366794A
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention provides a battery charging control device, which is applied to the technical field of battery charging and comprises the following components: the charging system comprises a charging mode switching module, a voltage loop control module, a current loop control module and an output competition module; the charging mode switching module is used for determining a voltage given value of the voltage loop control module according to an externally input charging trigger signal; the voltage loop control module is used for generating a voltage stabilization signal according to the voltage given value and an externally input output voltage value of the target battery; the current loop control module is used for generating a current stabilization signal according to an externally input current given value and an externally input charging current value of the target battery; and the output competition module is used for outputting a signal with a smaller level in the voltage stabilizing signal and the current stabilizing signal as a charging control signal of the target battery. The battery charging control device provided by the invention is simple to control and smooth in charging mode switching.
Description
Technical Field
The invention belongs to the technical field of battery charging, and particularly relates to a battery charging control device.
Background
In the prior art, batteries mainly have two charging modes, one is an even charging mode for rapidly charging the battery in a constant current and timing manner, and the other is a floating charging mode for additionally charging the battery at a constant voltage slightly higher than the open-circuit voltage of the battery.
Since the battery may be charged and exploded in a state of being uniformly charged for a long time and may be hard to reach a saturated state of charge in a state of being float-charged for a long time, it is necessary to perform switching of a charge mode and control of a charge signal. However, the existing battery charging control scheme generally has the problems of unsmooth charging control switching and complex control scheme.
Disclosure of Invention
The invention aims to provide a battery charging control device to solve the technical problems of unsmooth charging control switching and complex control scheme in the prior art.
In order to achieve the above object, the present invention provides a battery charging control device, including:
the charging system comprises a charging mode switching module, a voltage loop control module, a current loop control module and an output competition module;
the charging mode switching module is connected with the voltage loop control module, and the voltage loop control module and the current loop control module are both connected with the output competition module;
the charging mode switching module is used for determining a voltage given value of the voltage loop control module according to an externally input charging trigger signal;
the voltage loop control module is used for generating a voltage stabilization signal according to the voltage given value and an externally input output voltage value of the target battery; the current loop control module is used for generating a current stabilization signal according to an externally input current given value and an externally input charging current value of the target battery;
and the output competition module is used for outputting a signal with a smaller level in the voltage stabilizing signal and the current stabilizing signal as a charging control signal of the target battery.
Optionally, the charging trigger signal is a pre-charging trigger signal, an even-charging trigger signal or a floating-charging trigger signal; the charging mode switching module comprises an equalizing charge control unit, a floating charge control unit, a pre-charging control unit and a voltage given value switching unit;
the pre-charging control unit is used for outputting a corresponding pre-charging gating signal according to an externally input pre-charging trigger signal; the equalizing control unit is used for outputting a corresponding equalizing gating signal according to an equalizing triggering signal input from the outside; the floating charge control unit is used for outputting a corresponding floating charge gating signal according to a floating charge trigger signal input from the outside;
the voltage given value switching module is used for determining the voltage given value of the voltage loop control module according to the pre-charging gating signal, the equalizing charging gating signal and the floating charging gating signal.
Optionally, the charging mode switching module further includes a charging mode locking unit;
the charging mode locking unit is connected between the equalizing control unit and the floating control unit and used for realizing locking between the equalizing control unit and the floating control unit.
Optionally, the floating charge control unit includes a first floating charge trigger circuit, a second floating charge voltage trigger circuit, and a floating charge output circuit;
the input end of the first floating charge trigger circuit is used for receiving a charging current value of a target battery input from the outside and a floating charge current given value of the target battery input from the outside; the first end of the second floating charge trigger circuit is used for receiving an externally input floating charge trigger signal;
the output end of the first floating charge trigger circuit and the second end of the second floating charge trigger circuit are both connected with the first end of the floating charge output circuit, and the second end of the floating charge output circuit is used for outputting a floating charge gating signal.
Optionally, the equalizing control unit includes an equalizing trigger circuit and an equalizing output circuit connected in series;
the first end of the equalizing charge trigger circuit is used for receiving an equalizing charge trigger signal input from the outside, the second end of the equalizing charge trigger circuit is connected with the first end of the equalizing charge output circuit, and the second end of the equalizing charge output circuit is used for outputting an equalizing charge gating signal.
Optionally, the charging mode locking unit includes a first comparison circuit and a deadlock circuit;
the deadlock circuit comprises a first NAND gate and a second NAND gate;
the input end of the first comparison circuit is respectively connected with the voltage loop control module and the current loop control module, the output end of the first comparison circuit is connected with the second end of the equalizing charge trigger circuit and the first input end of the first NAND gate, the first end of the floating charge output circuit is connected with the second input end of the first NAND gate, and the output end of the first NAND gate is connected with the first end of the equalizing charge output circuit;
the output end of the first NAND gate is connected with the first input end of the second NAND gate, the output end of the first floating charge trigger circuit and the second end of the second floating charge trigger circuit are both connected with the second input end of the second NAND gate, and the output end of the second NAND gate is connected with the second input end of the first NAND gate.
Optionally, the voltage given value switching unit includes a first analog switch, a second analog switch, and a third analog switch;
the input end of the first analog switch is used for receiving a pre-charging voltage given value input from the outside, the output end of the first analog switch is used for outputting the pre-charging voltage given value, and the gating end of the first analog switch is used for receiving a pre-charging gating signal output by the pre-charging control unit;
the input end of the second analog switch is used for receiving an equalizing charge given value input from the outside, the output end of the second analog switch is used for outputting the equalizing charge given value, and the gating end of the second analog switch is used for receiving an equalizing charge gating signal output by the equalizing charge control unit;
the input end of the third analog switch is used for receiving a floating charge voltage given value input from the outside, the output end of the third analog switch is used for outputting the floating charge voltage given value, and the gating end of the third analog switch is used for receiving a floating charge gating signal output by the floating charge control unit;
and the output end of the first analog switch, the output end of the second analog switch and the output end of the third analog switch are connected with the voltage ring control module after being connected together, and are used for outputting a voltage given value to the voltage ring control module.
Optionally, the battery charging control device further includes: a flow limiting control module;
the current limiting control module is connected with the output competition module and is used for outputting a current limiting signal according to an externally input current limiting value and an externally input charging current value of the target battery;
and the output competition module is also used for outputting a signal with a smaller level in the voltage stabilizing signal, the current stabilizing signal and the current limiting signal as a charging control signal of the target battery.
Optionally, the battery charging control device further includes: a voltage sensor;
the voltage sensor is used for detecting the output voltage value of a target battery and transmitting the output voltage value of the target battery to the voltage loop control module.
Optionally, the battery charging control device further includes: a current sensor;
the current sensor is used for detecting the charging current value of a target battery and transmitting the charging current value of the target battery to the current loop control module.
The battery charging control device provided by the invention has the beneficial effects that:
in the aspect of charging signal control, the charging mode switching module can provide voltage set values under different charging modes for the voltage loop control module according to different charging trigger signals, and the voltage loop control module can control the charging voltage of a target battery under different charging modes based on the voltage set values. The current loop can directly control the charging current of the target battery according to the current set value input from the outside. Different from the prior art, the charging control method and the charging control device realize the control of the charging signals under a plurality of charging modes by only adopting two basic control loops, and the control scheme is simpler.
In the aspect of charging mode switching, the charging control signal is determined by the output competition module, and the output competition module determines the charging control signal according to the level of the voltage stabilizing signal and the level stabilizing signal. That is to say, the invention realizes the division of the charging mode through the comparison of the voltage stabilizing signal and the level of the current stabilizing signal, and the design can effectively prevent the sudden change of the regulating quantity in the switching process of the charging mode, thereby realizing the smooth switching of the charging mode.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a battery charging control apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a float charge control unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a voltage set point switching module according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery charging control device according to an embodiment of the present invention, where the battery charging control device 10 includes:
the charging mode switching module 11, the voltage loop control module 12, the current loop control module 13, and the output competition module 14. The charging mode switching module 11 is connected to the voltage loop control module 12, and both the voltage loop control module 13 and the current loop control module 14 are connected to the output competition module.
The charging mode switching module 11 is configured to determine a voltage set value of the voltage loop control module 12 according to an externally input charging trigger signal.
In this embodiment, the charging mode switching module 11 is configured to receive different charging trigger signals and output different voltage set values according to the different charging trigger signals. That is, different charging trigger signals correspond to different voltage set values.
The charging trigger signal is divided according to a charging mode, for example, the charging trigger signal may be a pre-charging trigger signal, an even-charging trigger signal, or a floating-charging trigger signal.
The voltage loop control module 12 is configured to generate a voltage stabilization signal according to the voltage set value and an externally input output voltage value of the target battery.
In this embodiment, the voltage loop control module 12 may be implemented based on a comparator circuit, wherein a positive input terminal of the comparator circuit is used for receiving an externally input output voltage value of the target battery, a negative input terminal is used for inputting a voltage set value, and an output terminal is used for outputting a voltage stabilization signal.
The current loop control module 13 is configured to generate a current stabilization signal according to an externally input current given value and an externally input charging current value of the target battery.
In this embodiment, the current loop control module 13 may be implemented based on a comparator circuit, wherein a positive input terminal of the comparator circuit is configured to receive a charging current value of the target battery input from the outside, a negative input terminal is configured to receive a current set value input from the outside, and an output terminal is configured to output a current stabilizing signal.
The output competition module 14 is configured to output a signal with a smaller level of the regulated voltage signal and the regulated current signal as the charge control signal of the target battery.
In the present embodiment, the output competition module 14 determines the charging control signal according to the level of the regulated voltage signal and the regulated current signal. That is to say, the invention realizes the division of the charging mode through the comparison of the voltage stabilizing signal and the level of the current stabilizing signal, and the design can effectively prevent the sudden change of the regulating quantity in the switching process of the charging mode, thereby realizing the smooth switching of the charging mode.
The output competition module 14 may be implemented directly based on a pull-up resistor and two diodes, for example, the output competition module may include a first diode, a second diode, and a pull-up resistor.
A first end of the pull-up resistor is connected with a preset voltage, and a second end of the pull-up resistor is respectively connected with the positive end of the first diode and the positive end of the second diode; the negative end of the first diode is connected with the output end of the voltage loop control module, and the negative end of the second diode is connected with the output end of the current loop control module; the positive end of the first diode and the positive end of the second diode form the output end of the output competition module, and the circuit can be used for selecting the signal with the lower level in the voltage stabilizing signal and the current stabilizing signal.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the charging mode switching module includes an equalizing charge control unit, a floating charge control unit, a pre-charge control unit, and a voltage set value switching unit.
The pre-charging control unit is used for outputting a corresponding pre-charging gating signal according to an externally input pre-charging trigger signal. The equalizing control unit is used for outputting a corresponding equalizing gating signal according to an equalizing triggering signal input from the outside. The floating charge control unit is used for outputting a corresponding floating charge gating signal according to a floating charge trigger signal input from the outside.
And the voltage given value switching module is used for determining the voltage given value of the voltage ring control module according to the pre-charging gating signal, the equalizing charging gating signal and the floating charging gating signal.
In this embodiment, the pre-charge control unit, the equalizing charge control unit, and the floating charge control unit are all connected to the voltage given value switching unit, and are configured to output the pre-charge gating signal, the equalizing charge gating signal, and the floating charge gating signal to the voltage given value switching unit, respectively.
The working process of the pre-charging control unit is as follows: when the pre-charging trigger signal is not received, the pre-charging strobe signal output by the pre-charging control unit is at a low level, and after the pre-charging trigger signal is received, the pre-charging strobe signal output by the pre-charging control unit can be changed into a high level (at this time, the corresponding pre-charging line in the voltage given value switching module is conducted, and then the voltage given value in the pre-charging mode is output).
The working process of the equalizing charge control unit and the floating charge control unit is the same, after receiving the equalizing charge trigger signal, the corresponding equalizing charge line in the voltage given value switching module is conducted to output the voltage given value under the equalizing charge mode, and after receiving the floating charge trigger signal, the corresponding floating charge line in the voltage given value switching module is conducted to output the voltage given value under the floating charge mode.
Optionally, the working process of the precharge control unit may also be designed as follows: when the pre-charging trigger signal is not received, the pre-charging strobe signal output by the pre-charging control unit is at a high level, and after the pre-charging trigger signal is received, the pre-charging strobe signal output by the pre-charging control unit is changed into a low level (at this time, the corresponding pre-charging line in the voltage given value switching module is switched on, and the voltage given value in the pre-charging mode is output), that is, as long as the pre-charging control unit can generate level change according to the pre-charging trigger signal, and the voltage given value switching unit can recognize the level change and respond in time.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the charging mode switching module further includes a charging mode locking unit.
The charging mode locking unit is connected between the equalizing control unit and the floating control unit and used for realizing locking between the equalizing control unit and the floating control unit.
In this embodiment, the meaning of achieving the locking between the equalizing charge control unit and the floating charge control unit is: at a certain moment, only one unit between the equalizing charge control unit and the floating charge control unit is in operation. The charging mode locking unit is arranged to prevent the uniform charging control unit and the floating charging control unit from running simultaneously.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the floating charge control unit includes a first floating charge trigger circuit, a second floating charge voltage trigger circuit, and a floating charge output circuit.
The input end of the first floating charge trigger circuit is used for receiving a charging current value of a target battery input from the outside and a floating charge current set value of the target battery input from the outside. The first end of the second floating charge trigger circuit is used for receiving an externally input floating charge trigger signal.
The output end of the first floating charge trigger circuit and the second end of the second floating charge trigger circuit are both connected with the first end of the floating charge output circuit, and the second end of the floating charge output circuit is used for outputting a floating charge gating signal.
In this embodiment, the triggering of the float control unit includes two conditions, the first is that the charging current value of the target battery is smaller than a preset float current set value, and the second is that a float trigger signal is received. Wherein, the float current set value can be set to 15% of the current set value of the current loop control module. That is, when the charging current is reduced to 15%, the target battery may be controlled to enter the float charging mode.
The first floating charge trigger circuit can be realized based on a comparator circuit and a diode, wherein a positive input end of the comparator circuit receives a charging current value of a target battery input from the outside, a negative input end of the comparator circuit receives a floating charge current set value of the target battery input from the outside, and an output end of the comparator circuit outputs a high/low level signal. The second float trigger circuit may be implemented based on a diode. In this embodiment, referring to fig. 2, fig. 2 shows an implementation manner of a first trigger circuit and a second trigger circuit, where the first trigger circuit and the second trigger circuit can implement conduction of an internal line of a floating charge control unit by pulling down a level of a cathode end of a diode, so as to output a corresponding floating charge gating signal.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the equalizing control unit includes an equalizing trigger circuit and an equalizing output circuit that are connected in series.
The first end of the equalizing charge trigger circuit is used for receiving an equalizing charge trigger signal input from the outside, the second end of the equalizing charge trigger circuit is connected with the first end of the equalizing charge output circuit, and the second end of the equalizing charge output circuit is used for outputting an equalizing charge gating signal.
In this embodiment, the design of the equalizing charge trigger circuit may refer to the second floating charge trigger circuit, and the same process is not repeated here.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the charging mode locking unit includes a first comparison circuit and a deadlock circuit.
The deadlock circuit comprises a first nand gate and a second nand gate.
The input end of the first comparison circuit is respectively connected with the voltage loop control module and the current loop control module, the output end of the first comparison circuit is connected with the second end of the equalizing charge trigger circuit and the first input end of the first NAND gate, the first end of the floating charge output circuit is connected with the second input end of the first NAND gate, and the output end of the first NAND gate is connected with the first end of the equalizing charge output circuit.
The output end of the first NAND gate is connected with the first input end of the second NAND gate, the output end of the first floating charge trigger circuit and the second end of the second floating charge trigger circuit are both connected with the second input end of the second NAND gate, and the output end of the second NAND gate is connected with the second input end of the first NAND gate.
In this embodiment, the first comparing circuit is configured to output a corresponding high/low level signal according to the regulated voltage signal output by the voltage loop control module and the regulated current signal output by the current loop control module, where the high/low level signal is used for locking the charging mode.
In this embodiment, the locking between the equalizing control unit and the floating control unit can be realized based on the comparison circuit and the nand gate. The first comparison circuit is used for realizing level comparison of the voltage stabilizing signal and the current stabilizing signal and outputting a level signal corresponding to the current charging mode, and the level signal and the second end of the equalizing charge trigger circuit are connected in common and then serve as the input quantity of the first NAND gate. That is to say, in this embodiment, the independence of the two control units is realized through the two nand gates, and the distinction of the charging modes between the two control units is realized through the comparison of the voltage stabilizing signal and the current stabilizing signal, so as to realize the locking between the even charging control unit and the floating charging control unit.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the voltage set value switching unit includes a first analog switch, a second analog switch, and a third analog switch.
The input end of the first analog switch is used for receiving a pre-charging voltage given value input from the outside, the output end of the first analog switch is used for outputting the pre-charging voltage given value, and the gating end of the first analog switch is used for receiving a pre-charging gating signal output by the pre-charging control unit.
The input end of the second analog switch is used for receiving an equalizing charge voltage set value input from the outside, the output end of the second analog switch is used for outputting the equalizing charge voltage set value, and the gating end of the second analog switch is used for receiving an equalizing charge gating signal output by the equalizing charge control unit.
The input end of the third analog switch is used for receiving a floating charge voltage given value input from the outside, the output end of the third analog switch is used for outputting the floating charge voltage given value, and the gating end of the third analog switch is used for receiving a floating charge gating signal output by the floating charge control unit.
The output end of the first analog switch, the output end of the second analog switch and the output end of the third analog switch are connected with the voltage ring control module after being connected together, and the output end of the first analog switch, the output end of the second analog switch and the output end of the third analog switch are used for outputting a given voltage value to the voltage ring control module.
In this embodiment, referring to fig. 3, the voltage set-point switching unit can be implemented based on three analog switches, in fig. 3, Uref-Bat1 is a pre-charge set-point voltage, Uc-Bat is a pre-charge gating signal, Uref-jc1 is an average charge set-point voltage, Uc-jc is an average charge gating signal, Uref-fc1 is a floating set-point voltage, Uc-fc is a floating gating signal, and UDC-ref is a voltage set-point voltage output by the voltage loop control module.
In this embodiment, referring to fig. 3, a diode may be disposed in the set-point voltage switching unit to achieve the locking of the precharge mode, and the principle is as follows: when the battery is in the pre-charging mode (i.e. after receiving the pre-charging trigger signal), the cathode terminals of the two diodes are at a low level, and in the example shown in fig. 3, the gating terminal of the analog switch is turned on only when receiving a high level signal, so that when the battery is in the pre-charging mode, the conduction of the equalizing charge line and the floating charge line can be prevented, and the operation of only the pre-charging line is ensured.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the battery charging control apparatus further includes: and a flow limiting control module.
The current limiting control module is connected with the output competition module and used for outputting a current limiting signal according to an externally input current limiting value and an externally input charging current value of the target battery.
The output competition module is also used for outputting a signal with a smaller level in the voltage stabilizing signal, the current stabilizing signal and the current limiting signal as a charging control signal of the target battery.
In this embodiment, the current-limiting control module is configured to perform short-circuit protection on the battery charging line, that is, when the battery charging line is short-circuited and the charging current of the target battery is greater than the current-limiting value, the current is limited in time.
In this embodiment, the current-limiting control module may be implemented based on a comparator circuit, wherein a positive input terminal of the comparator circuit is configured to receive a charging current value of a target battery input from the outside, a negative input terminal of the comparator circuit is configured to receive a current-limiting current value input from the outside, and an output terminal of the comparator circuit is configured to output a current-limiting signal.
The current limiting current value can be set to 110% -125% of a current given value corresponding to the current loop control module (that is, the range of the current limiting current value can be 110% -125% -of the current given value).
As can be seen from the above description of the embodiments, the present invention can implement the charging control of the battery in a pure hardware manner, and thus can be effectively applied to the field of nuclear power. In the field of nuclear power, in order to avoid complex line connection in the prior art, charging control of a battery is generally realized through software, and the software control has the defects of complex algorithm, high detection cost, low safety and the like, so that a battery charging control scheme with low cost and high safety is urgently needed. According to the description of the above embodiment of the present invention, the battery charging control can be realized in a pure hardware manner, and the hardware implementation manner of the present invention has a simple circuit structure (the charging control in multiple modes is realized through the innovative connection of the comparator circuit and other basic circuits), and does not have the defects of complex algorithm, high detection cost, low safety and the like, so that the problems faced by the battery charging control in the nuclear power field are effectively solved.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the battery charging control apparatus may further include: a voltage sensor.
The voltage sensor is used for detecting the output voltage value of the target battery and transmitting the output voltage value of the target battery to the voltage loop control module.
Optionally, as a specific implementation manner of the battery charging control apparatus provided in the embodiment of the present invention, the battery charging control apparatus may further include: and a current sensor.
The current sensor is used for detecting the charging current value of the target battery and transmitting the charging current value of the target battery to the current loop control module.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A battery charge control device, comprising:
the charging system comprises a charging mode switching module, a voltage loop control module, a current loop control module and an output competition module;
the charging mode switching module is connected with the voltage loop control module, and the voltage loop control module and the current loop control module are both connected with the output competition module;
the charging mode switching module is used for determining a voltage given value of the voltage loop control module according to an externally input charging trigger signal;
the voltage loop control module is used for generating a voltage stabilization signal according to the voltage given value and an externally input output voltage value of the target battery; the current loop control module is used for generating a current stabilization signal according to an externally input current given value and an externally input charging current value of the target battery;
and the output competition module is used for outputting a signal with a smaller level in the voltage stabilizing signal and the current stabilizing signal as a charging control signal of the target battery.
2. The battery charge control device of claim 1, wherein the charge trigger signal is a pre-charge trigger signal, an even-charge trigger signal, or a floating-charge trigger signal; the charging mode switching module comprises an equalizing charge control unit, a floating charge control unit, a pre-charging control unit and a voltage given value switching unit;
the pre-charging control unit is used for outputting a corresponding pre-charging gating signal according to an externally input pre-charging trigger signal; the equalizing control unit is used for outputting a corresponding equalizing gating signal according to an equalizing triggering signal input from the outside; the floating charge control unit is used for outputting a corresponding floating charge gating signal according to a floating charge trigger signal input from the outside;
the voltage given value switching module is used for determining the voltage given value of the voltage loop control module according to the pre-charging gating signal, the equalizing charging gating signal and the floating charging gating signal.
3. The battery charge control device according to claim 2, wherein the charge mode switching module further comprises a charge mode locking unit;
the charging mode locking unit is connected between the equalizing control unit and the floating control unit and used for realizing locking between the equalizing control unit and the floating control unit.
4. The battery charge control device of claim 3, wherein the float control unit comprises a first float trigger circuit, a second float voltage trigger circuit, a float output circuit;
the input end of the first floating charge trigger circuit is used for receiving a charging current value of a target battery input from the outside and a floating charge current given value of the target battery input from the outside; the first end of the second floating charge trigger circuit is used for receiving an externally input floating charge trigger signal;
the output end of the first floating charge trigger circuit and the second end of the second floating charge trigger circuit are both connected with the first end of the floating charge output circuit, and the second end of the floating charge output circuit is used for outputting a floating charge gating signal.
5. The battery charge control apparatus according to claim 4, wherein the equalizing control unit includes an equalizing trigger circuit and an equalizing output circuit connected in series;
the first end of the equalizing charge trigger circuit is used for receiving an equalizing charge trigger signal input from the outside, the second end of the equalizing charge trigger circuit is connected with the first end of the equalizing charge output circuit, and the second end of the equalizing charge output circuit is used for outputting an equalizing charge gating signal.
6. The battery charge control apparatus of claim 5, wherein the charge mode locking unit comprises a first comparison circuit and a deadlock circuit;
the deadlock circuit comprises a first NAND gate and a second NAND gate;
the input end of the first comparison circuit is respectively connected with the voltage loop control module and the current loop control module, the output end of the first comparison circuit is connected with the second end of the equalizing charge trigger circuit and the first input end of the first NAND gate, the first end of the floating charge output circuit is connected with the second input end of the first NAND gate, and the output end of the first NAND gate is connected with the first end of the equalizing charge output circuit;
the output end of the first NAND gate is connected with the first input end of the second NAND gate, the output end of the first floating charge trigger circuit and the second end of the second floating charge trigger circuit are both connected with the second input end of the second NAND gate, and the output end of the second NAND gate is connected with the second input end of the first NAND gate.
7. The battery charge control device according to claim 2, wherein the voltage given value switching unit includes a first analog switch, a second analog switch, a third analog switch;
the input end of the first analog switch is used for receiving a pre-charging voltage given value input from the outside, the output end of the first analog switch is used for outputting the pre-charging voltage given value, and the gating end of the first analog switch is used for receiving a pre-charging gating signal output by the pre-charging control unit;
the input end of the second analog switch is used for receiving an equalizing charge given value input from the outside, the output end of the second analog switch is used for outputting the equalizing charge given value, and the gating end of the second analog switch is used for receiving an equalizing charge gating signal output by the equalizing charge control unit;
the input end of the third analog switch is used for receiving a floating charge voltage given value input from the outside, the output end of the third analog switch is used for outputting the floating charge voltage given value, and the gating end of the third analog switch is used for receiving a floating charge gating signal output by the floating charge control unit;
and the output end of the first analog switch, the output end of the second analog switch and the output end of the third analog switch are connected with the voltage ring control module after being connected together, and are used for outputting a voltage given value to the voltage ring control module.
8. The battery charge control apparatus of claim 1, further comprising:
a flow limiting control module;
the current limiting control module is connected with the output competition module and is used for outputting a current limiting signal according to an externally input current limiting value and an externally input charging current value of the target battery;
and the output competition module is also used for outputting a signal with a smaller level in the voltage stabilizing signal, the current stabilizing signal and the current limiting signal as a charging control signal of the target battery.
9. The battery charge control apparatus of claim 1, further comprising:
a voltage sensor;
the voltage sensor is used for detecting the output voltage value of a target battery and transmitting the output voltage value of the target battery to the voltage loop control module.
10. The battery charge control apparatus of claim 1, further comprising:
a current sensor;
the current sensor is used for detecting the charging current value of a target battery and transmitting the charging current value of the target battery to the current loop control module.
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