CN112366794B - Battery charging control device - Google Patents
Battery charging control device Download PDFInfo
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- CN112366794B CN112366794B CN202011375800.3A CN202011375800A CN112366794B CN 112366794 B CN112366794 B CN 112366794B CN 202011375800 A CN202011375800 A CN 202011375800A CN 112366794 B CN112366794 B CN 112366794B
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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 device 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 stabilizing signal according to the voltage given value and an output voltage value of a target battery input from the outside; the current loop control module is used for generating a steady current 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 the voltage stabilizing signal and a signal with smaller level in the voltage 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, the battery mainly has two charging modes, namely a uniform charging mode for rapidly charging the battery in a constant current and constant time mode and a floating charging mode for carrying out supplementary charging on the battery in a constant voltage slightly higher than the breaking voltage of the battery.
Since the battery may be charged and exploded in a state of being charged for a long time and may be difficult to reach a saturated state of charge in a state of being floated for a long time, it is necessary to perform switching of a charging mode and control of a charging 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 which solves 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 device 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 stabilizing signal according to the voltage given value and an output voltage value of a target battery input from the outside; the current loop control module is used for generating a steady current 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 the voltage stabilizing signal and a signal with smaller level in the voltage stabilizing signal as a charging control signal of the target battery.
Optionally, the charging trigger signal is a pre-charging trigger signal, a homogeneous charging trigger signal or a floating charging trigger signal; the charging mode switching module comprises a uniform charging control unit, a floating charging control unit, a precharge control unit and a voltage set value switching unit;
the precharge control unit is used for outputting a corresponding precharge gating signal according to an externally input precharge triggering signal; the uniform charging control unit is used for outputting corresponding uniform charging strobe signals according to externally input uniform charging trigger signals; the floating charge control unit is used for outputting a corresponding floating charge gating signal according to an externally input floating charge triggering signal;
the voltage set value switching module is used for determining a voltage set value of the voltage loop control module according to the pre-charging strobe signal, the uniform charging strobe signal and the floating charging strobe signal.
Optionally, the charging mode switching module further includes a charging mode locking unit;
the charging mode locking unit is connected between the uniform charging control unit and the floating charging control unit and is used for locking the uniform charging control unit and the floating charging control unit.
Optionally, the floating charge control unit comprises 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 float charge trigger circuit is used for receiving an externally input charging current value of the target battery and an externally input float charge current given value of the target battery; 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 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 homogeneous charge control unit comprises a homogeneous charge trigger circuit and a homogeneous charge output circuit which are connected in series;
the first end of the charge-equalization trigger circuit is used for receiving an externally input charge-equalization trigger signal, the second end of the charge-equalization trigger circuit is connected with the first end of the charge-equalization output circuit, and the second end of the charge-equalization output circuit is used for outputting a charge-equalization gate signal.
Optionally, the charging mode locking unit includes a first comparing 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 charge balancing 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 charge balancing 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 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 an externally input precharge voltage given value, the output end of the first analog switch is used for outputting the precharge voltage given value, and the gating end of the first analog switch is used for receiving a precharge gating signal output by the precharge control unit;
the input end of the second analog switch is used for receiving an average charging voltage given value input from the outside, the output end of the second analog switch is used for outputting the average charging voltage given value, and the gating end of the second analog switch is used for receiving an average charging gating signal output by the average charging control unit;
the input end of the third analog switch is used for receiving an externally input floating charge voltage given value, 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 loop control module after being connected together and are used for outputting a voltage given value to the voltage loop control module.
Optionally, the battery charging control device further includes: a current 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;
the output competition module is further configured to output a signal with a smaller level of 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 the 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 a 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 the 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. Compared with the prior art, the invention realizes the control of the charging signals in a plurality of charging modes by only adopting two basic control loops, and the control scheme is simpler.
In the aspect of charge mode switching, the charge control signal is determined by the output competition module, and the output competition module determines the charge control signal according to the level of the voltage stabilizing signal and the level of the current stabilizing signal. That is, the invention realizes the division of the charging modes by comparing the voltage stabilizing signal and the voltage stabilizing signal level, and the design can effectively prevent the abrupt change of the regulating variable in the process of switching the charging modes, thereby realizing the smooth switching of the charging modes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery charging control device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a floating 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 invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the 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 for purposes of illustration only and are not intended to limit the scope of the invention.
The invention will be described in further detail with reference to the drawings and the detailed description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery charging control device according to an embodiment of the invention, and the battery charging control device 10 includes:
a charging mode switching module 11, a voltage loop control module 12, a current loop control module 13, and an output competition module 14. The charging mode switching module 11 is connected with the voltage loop control module 12, and the voltage loop control module 13 and the current loop control module 14 are connected with the output competition module.
The charging mode switching module 11 is configured to determine a voltage set point 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 charge trigger signals correspond to different voltage set points.
The charging trigger signal is divided according to a charging mode, for example, the charging trigger signal may be a precharge trigger signal, a homogeneous charge trigger signal, or a float charge trigger signal.
The voltage loop control module 12 is used for generating a voltage stabilizing signal according to a voltage given value and an output voltage value of an externally input target battery.
In this embodiment, the voltage loop control module 12 may be implemented based on a comparator circuit, where a positive input terminal of the comparator circuit is used for receiving an output voltage value of a target battery input from the outside, a negative input terminal is used for inputting a voltage set value, and an output terminal is used for outputting a voltage stabilizing signal.
The current loop control module 13 is used for generating a steady-current signal according to an externally input current given value and an externally input charging current value of a target battery.
In this embodiment, the current loop control module 13 may be implemented based on a comparator circuit, where a positive input terminal of the comparator circuit is used for receiving an externally input charging current value of the target battery, a negative input terminal is used for receiving an externally input current set value, and an output terminal is used for outputting a steady current signal.
The output competition module 14 is configured to output a signal with a smaller level of the voltage stabilizing signal and the current stabilizing signal as a charge control signal of the target battery.
In this embodiment, the output competition module 14 determines the charging control signal according to the level of the voltage stabilizing signal and the level of the current stabilizing signal. That is, the invention realizes the division of the charging modes by comparing the voltage stabilizing signal and the voltage stabilizing signal level, and the design can effectively prevent the abrupt change of the regulating variable in the process of switching the charging modes, thereby realizing the smooth switching of the charging modes.
The output competition module 14 may be directly implemented based on the 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.
The first end of the pull-up resistor is connected with a preset voltage, and the second end of the pull-up resistor is connected with the positive electrode end of the first diode and the positive electrode end of the second diode respectively; the negative electrode end of the first diode is connected with the output end of the voltage loop control module, and the negative electrode end of the second diode is connected with the output end of the current loop control module; the positive terminal of the first diode and the positive terminal of the second diode form an output terminal of the output competition module, and the circuit can be used for selecting a voltage stabilizing signal and a signal with smaller level in the voltage stabilizing signal.
Optionally, as a specific implementation manner of the battery charging control device provided by the embodiment of the invention, the charging mode switching module includes a homogeneous charging control unit, a float charging control unit, a precharge control unit, and a voltage set value switching unit.
The precharge control unit is used for outputting a corresponding precharge gating signal according to an externally input precharge triggering signal. The homogeneous charge control unit is used for outputting a corresponding homogeneous charge gating signal according to an externally input homogeneous charge triggering signal. The floating charge control unit is used for outputting a corresponding floating charge gating signal according to an externally input floating charge triggering signal.
The voltage set point switching module is used for determining the voltage set point of the voltage ring control module according to the pre-charging strobe signal, the uniform charging strobe signal and the floating charging strobe signal.
In this embodiment, the precharge control unit, the charge equalization control unit, and the floating charge control unit are all connected to the voltage set value switching unit, and are configured to output a precharge gate signal, a charge equalization gate signal, and a floating charge gate signal to the voltage set value switching unit, respectively.
The working process of the precharge control unit is as follows: when the precharge trigger signal is not received, the precharge gate signal output by the precharge control unit is at a low level, and after the precharge trigger signal is received, the precharge gate signal output by the precharge control unit is changed to a high level (at this time, a corresponding precharge line in the voltage set value switching module is conducted, and then a voltage set value in a precharge mode is output).
The working processes of the uniform charging control unit and the floating charging control unit are the same, after receiving the uniform charging trigger signal, the corresponding uniform charging line in the voltage set value switching module is conducted, the voltage set value in the uniform charging mode is output, after receiving the floating charging trigger signal, the corresponding floating charging line in the voltage set value switching module is conducted, and the voltage set value in the floating charging mode is output.
Alternatively, the precharge control unit may be designed to operate as follows: when the precharge trigger signal is not received, the precharge gate signal output by the precharge control unit is at a high level, and after the precharge trigger signal is received, the precharge gate signal output by the precharge control unit is changed to a low level (at this time, a corresponding precharge line in the voltage set point switching module is conducted, and a voltage set point in a precharge mode is output), that is, as long as the precharge control unit can change the level according to the precharge trigger signal, and the voltage set point switching unit can recognize the level change and respond in time.
Optionally, as a specific implementation manner of the battery charging control device provided by 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 uniform charging control unit and the floating charging control unit and is used for locking the uniform charging control unit and the floating charging control unit.
In this embodiment, the means of realizing the lock between the homogeneous charge control unit and the float charge control unit is: at a certain moment, only one unit between the homogeneous charge control unit and the floating charge control unit is running. The charging mode locking unit is arranged to avoid simultaneous operation of the homogeneous charging control unit and the floating charging control unit.
Optionally, as a specific implementation manner of the battery charging control device provided by the embodiment of the present invention, the floating charging control unit includes a first floating charging trigger circuit, a second floating charging voltage trigger circuit, and a floating charging output circuit.
The input end of the first float trigger circuit is used for receiving an externally input charging current value of the target battery and an externally input float charging current given value of the target battery. 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 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, a first condition is that the charging current value of the target battery is smaller than a preset float charging current given value, and a second condition is that a float trigger signal is received. Wherein, the floating charge current given value can be set to be 15% of the current given value of the current loop control module. That is, when the charging current is reduced to 15%, the target battery can be controlled to enter the float mode.
The first floating charge trigger circuit can be realized based on a comparator circuit and a diode, wherein the positive input end of the comparator circuit receives the externally input charging current value of the target battery, the negative input end receives the externally input floating charging current given value of the target battery, and the output end outputs a high/low level signal. The second floating charge 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 realize the conduction of an internal circuit of the floating charge control unit by pulling down the level of the negative terminal of the diode, so as to output a corresponding floating charge strobe signal.
Optionally, as a specific implementation manner of the battery charging control device provided by the embodiment of the present invention, the homogeneous charge control unit includes a homogeneous charge trigger circuit and a homogeneous charge output circuit connected in series.
The first end of the charge equalization trigger circuit is used for receiving an externally input charge equalization trigger signal, the second end of the charge equalization trigger circuit is connected with the first end of the charge equalization output circuit, and the second end of the charge equalization output circuit is used for outputting a charge equalization strobe signal.
In this embodiment, the design of the homogeneous charge trigger circuit may refer to the second floating charge trigger circuit, and the two are similar, and will not be described herein again.
Optionally, as a specific implementation manner of the battery charging control device provided by the embodiment of the present invention, the charging mode locking unit includes a first comparing circuit and a deadlock circuit.
The deadlock circuit includes 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 charge-equalization 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 charge-equalization 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 comparison circuit is configured to output a corresponding high/low level signal according to the voltage stabilizing signal output by the voltage loop control module and the current stabilizing signal output by the current loop control module, where the high/low level signal is used for locking the charging mode.
In the present embodiment, locking between the homogeneous charge control unit and the float control unit may be achieved based on the comparison circuit and the nand gate. The first comparison circuit is used for comparing the level of the voltage stabilizing signal and the level of the current stabilizing signal, outputting a level signal corresponding to the current charging mode, and the level signal is commonly connected with the second end of the homogeneous charge trigger circuit and then used as the input quantity of the first NAND gate. That is, in this embodiment, the two control units are independent through the two nand gates, and the charging modes between the two control units are distinguished through the comparison of the voltage stabilizing signal and the current stabilizing signal, so that the locking between the homogeneous charging control unit and the floating charging control unit is realized.
Optionally, as a specific implementation manner of the battery charging control device provided by the embodiment of the present invention, 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 an externally input precharge voltage given value, the output end of the first analog switch is used for outputting the precharge voltage given value, and the gating end of the first analog switch is used for receiving a precharge gating signal output by the precharge control unit.
The input end of the second analog switch is used for receiving the uniform charging voltage set value input from the outside, the output end of the second analog switch is used for outputting the uniform charging voltage set value, and the gating end of the second analog switch is used for receiving the uniform charging gating signal output by the uniform charging control unit.
The input end of the third analog switch is used for receiving the 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 the 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 loop control module after being connected together and used for outputting a voltage given value to the voltage loop control module.
In this embodiment, referring to fig. 3, the voltage set point switching unit may be implemented based on three analog switches, where Uref-Bat1 is a precharge voltage set point, uc-Bat is a precharge gate signal, uref-jc1 is a uniform charge voltage set point, uc-jc is a uniform charge gate signal, uref-fc1 is a floating charge voltage set point, uc-fc is a floating charge gate signal, and UDC-ref is a voltage set point output by the voltage loop control module in fig. 3.
In this embodiment, referring to fig. 3, a diode may be provided in the voltage set point switching unit to realize locking of the precharge mode, which is based on the following principle: when the battery is in the precharge mode (i.e., after receiving the precharge trigger signal), the negative terminals of the two diodes are at low level, and in the example of fig. 3, the strobe terminal of the analog switch is turned on only when receiving the high level signal, so that the battery is in the precharge mode, the homogeneous charge line and the floating charge line can be prevented from being turned on, and only the precharge line is ensured to operate.
Optionally, as a specific implementation manner of the battery charging control device provided by the embodiment of the present invention, the battery charging control device further includes: and the current 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 the externally input current limiting value and the externally input charging current value of the target battery.
The output competition module is also used for outputting a signal with 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 current value, current limiting is performed in time.
In this embodiment, the current limiting control module may be implemented based on a comparator circuit, where a positive input terminal of the comparator circuit is used for receiving an externally input charging current value of the target battery, a negative input terminal is used for receiving an externally input current limiting value, and an output terminal is used for outputting a current limiting signal.
The current limiting value can be set to 110% -125% of the current set value corresponding to the current loop control module (i.e. the current limiting value range can be 110% -125% of the current set value).
From the description of the above embodiments, the present invention can realize the charge control of the battery by means of pure hardware, and thus can be effectively applied to the nuclear power field. In the nuclear power field, in order to avoid complex circuit connection in the prior art, the battery charging control is generally implemented by 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 needed. According to the description of the embodiment of the invention, the battery charge control can be realized by a pure hardware mode, and the hardware implementation mode of the invention has a simple circuit structure (the charge control of multiple modes is realized by innovative connection of a comparator circuit and other basic circuits), and the defects of complex algorithm, high detection cost, low safety and the like are overcome, so that the problem of the battery charge control in the nuclear power field is effectively solved.
Optionally, as a specific implementation manner of the battery charging control device provided by the embodiment of the present invention, the battery charging control device 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 device provided by the embodiment of the present invention, the battery charging control device may further include: a current sensor.
The current sensor is used for detecting a charging current value of the target battery and transmitting the charging current value of the target battery to the current loop control module.
The present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. A battery charge control device, characterized by comprising:
the device comprises a charging mode switching module, a voltage loop control module, a current loop control module, an output competition module and a current limiting control module;
the charging mode switching module is connected with the voltage loop control module, and the voltage loop control module, the current loop control module and the current limiting control module are all 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 charging trigger signals are pre-charging trigger signals, uniform charging trigger signals or floating charging trigger signals, and different charging trigger signals correspond to different voltage set values;
the voltage loop control module is used for generating a voltage stabilizing signal according to the voltage given value and an output voltage value of a target battery input from the outside; the current loop control module is used for generating a steady current signal according to an externally input current given value and an externally input charging current value of the target battery; the current limiting control module 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; the output competition module is used for outputting a signal with 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.
2. The battery charge control device according to claim 1, wherein the charge mode switching module includes a homogeneous charge control unit, a float charge control unit, a precharge control unit, a voltage set point switching unit;
the precharge control unit is used for outputting a corresponding precharge gating signal according to an externally input precharge triggering signal; the uniform charging control unit is used for outputting corresponding uniform charging strobe signals according to externally input uniform charging trigger signals; the floating charge control unit is used for outputting a corresponding floating charge gating signal according to an externally input floating charge triggering signal;
the voltage set value switching module is used for determining a voltage set value of the voltage loop control module according to the pre-charging strobe signal, the uniform charging strobe signal and the floating charging strobe signal.
3. The battery charge control device according to claim 2, wherein the charge mode switching module further includes a charge mode locking unit;
the charging mode locking unit is connected between the uniform charging control unit and the floating charging control unit and is used for locking the uniform charging control unit and the floating charging control unit.
4. The battery charge control device according to claim 3, wherein the float control unit includes a first float trigger circuit, a second float trigger circuit, a float output circuit;
the input end of the first float charge trigger circuit is used for receiving an externally input charging current value of the target battery and an externally input float charge current given value of the target battery; 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 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 device according to claim 4, wherein the homogeneous charge control unit includes a homogeneous charge trigger circuit and a homogeneous charge output circuit connected in series;
the first end of the charge-equalization trigger circuit is used for receiving an externally input charge-equalization trigger signal, the second end of the charge-equalization trigger circuit is connected with the first end of the charge-equalization output circuit, and the second end of the charge-equalization output circuit is used for outputting a charge-equalization gate signal.
6. The battery charge control device according to claim 5, wherein the charge mode locking unit includes a first comparing 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 charge balancing 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 charge balancing 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 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 an externally input precharge voltage given value, the output end of the first analog switch is used for outputting the precharge voltage given value, and the gating end of the first analog switch is used for receiving a precharge gating signal output by the precharge control unit;
the input end of the second analog switch is used for receiving an average charging voltage given value input from the outside, the output end of the second analog switch is used for outputting the average charging voltage given value, and the gating end of the second analog switch is used for receiving an average charging gating signal output by the average charging control unit;
the input end of the third analog switch is used for receiving an externally input floating charge voltage given value, 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 loop control module after being connected together and are used for outputting a voltage given value to the voltage loop control module.
8. The battery charge control device according to claim 1, further comprising:
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.
9. The battery charge control device according to claim 1, further comprising:
a current sensor;
the current sensor is used for detecting a 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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