CN112366794B - Battery charging control device - Google Patents

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

Battery Charging Control

technical field

The invention belongs to the technical field of battery charging, and more specifically relates to a battery charging control device.

Background technique

In the prior art, there are mainly two charging modes for the battery, one is the equalization charging mode that rapidly charges the battery with a constant current and a fixed time, and the other is a constant voltage that is slightly higher than the battery cut-off voltage. Float charge mode for supplementary charging of the battery.

Since the battery may explode in the state of long-term equal charge, and it may be difficult to reach the saturated state of charge in the state of long-term floating charge, so it is necessary to switch the charging mode and control the charging signal. However, the existing battery charging control schemes usually have the problems of unsmooth charging control switching and complicated control schemes.

Contents of the invention

The object of the present invention is to provide a battery charging control device to solve the technical problems of unsmooth charging control switching and complex control schemes in the prior art.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a battery charging control device, which includes:

Charging mode switching module, voltage loop control module, current loop control module, output competition module;

The charging mode switching module is connected to the voltage loop control module, and both the voltage loop control module and the current loop control module are connected to the output competition module;

The charging mode switching module is used to determine a given voltage value of the voltage loop control module according to an externally input charging trigger signal;

The voltage loop control module is used to generate a voltage stabilization signal according to the given voltage value and the output voltage value of the target battery input from the outside; The charging current value of the target battery generates a steady current signal;

The output competition module is used for outputting the signal with a lower level among the steady voltage signal and the steady current signal as the charging control signal of the target battery.

Optionally, the charging trigger signal is a pre-charge trigger signal, an equal charge trigger signal or a floating charge trigger signal; the charging mode switching module includes an equal charge control unit, a float charge control unit, a pre-charge control unit, a voltage setting value switching unit;

The pre-charging control unit is used to output a corresponding pre-charging strobe signal according to an externally input pre-charging trigger signal; the equalizing charge control unit is used to output a corresponding equalizing charging strobe signal according to an externally input equalizing charging trigger signal; The float charge control unit is used to output a corresponding float charge strobe signal according to an externally input float charge trigger signal;

The voltage setting value switching module is used to determine the voltage setting 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 equalization charging control unit and the floating charging control unit, and is used for realizing the locking between the equalizing charging control unit and the floating charging control unit.

Optionally, the float control unit includes a first float trigger circuit, a second float voltage trigger circuit, and a float output circuit;

The input terminal of the first floating charge trigger circuit is used to receive the charging current value of the target battery input externally and the floating charge current given value of the target battery input externally; the first terminal of the second float charge trigger circuit is used for To receive the floating charge trigger signal input from the outside;

The output end of the first float trigger circuit and the second end of the second float trigger circuit are connected to the first end of the float output circuit, and the second end of the float output circuit is used for Output float strobe signal.

Optionally, the equalization control unit includes an equalization trigger circuit and an equalization output circuit connected in series;

The first end of the equalizing trigger circuit is used to receive an externally input equalizing trigger signal, the second end of the equalizing trigger circuit is connected to the first end of the equalizing output circuit, and the equalizing output circuit The second terminal is used to output equalizing strobe signal.

Optionally, the charging mode locking unit includes a first comparison circuit and a deadlock circuit;

The deadlock circuit includes a first NAND gate and a second NAND gate;

The input terminal of the first comparison circuit is respectively connected to the voltage loop control module and the current loop control module, and the output terminal of the first comparison circuit is connected to the second terminal of the equalizing trigger circuit, the second The first input end of a NAND gate is connected, the first end of the floating charge output circuit is connected with the second input end of the first NAND gate, the output end of the first NAND gate is connected with the equalizing The first end of the charge output circuit is connected;

The output end of the first NAND gate is connected to the first input end of the second NAND gate, and the output end of the first floating charge trigger circuit and the second end of the second float charge trigger circuit are both connected to the second input end of the second NAND gate, and the output end of the second NAND gate is connected to the second input end of the first NAND gate.

Optionally, the voltage setting 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 to receive a given value of the precharge voltage input from the outside, the output end of the first analog switch is used to output the given value of the precharge voltage, and the first analog switch The gate terminal is used to receive the precharge gate signal output by the precharge control unit;

The input terminal of the second analog switch is used to receive a given value of the equalized charging voltage input from the outside, and the output terminal of the second analog switch is used to output the given value of the equalized charging voltage. The strobe terminal is used to receive the equalized charge gate signal output by the equalized charge control unit;

The input end of the third analog switch is used to receive a given value of floating charge voltage input from the outside, the output end of the third analog switch is used to output the given value of floating charge voltage, and the set value of the floating charge voltage of the third analog switch is The gate terminal is used to receive the float gate signal output by the float 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 to the voltage loop control module after being connected together, and are used to connect to the voltage loop control module Output voltage given value.

Optionally, the battery charging control device further includes: a current limiting control module;

The current-limiting control module is connected to the output competition module, and is used to output a current-limiting signal according to an externally input current-limiting current value and an externally input charging current value of a target battery;

The output competition module is further configured to output the signal with a lower level among the voltage-stabilizing signal, the current-stabilizing signal, and the current-limiting signal as the charging control signal of the target battery.

Optionally, the battery charging control device further includes: a voltage sensor;

The voltage sensor is used to detect the output voltage value of the target battery, and transmit 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 to detect the charging current value of the target battery, and transmit the charging current value of the target battery to the current loop control module.

The beneficial effects of the battery charging control device provided by the present invention are:

In terms of charging signal control, the charging mode switching module in the present invention can provide voltage given values in different charging modes for the voltage loop control module according to different charging trigger signals, and the voltage loop control module can perform different charging based on the given voltage values. Control of the target battery charge voltage in charge mode. The current loop can directly control the target battery charging current according to the external input current given value. Different from the prior art, the present invention only uses two basic control loops to realize the control of charging signals in multiple charging modes, and the control scheme is simpler.

In terms of charging mode switching, in the present invention, 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 steady voltage signal and the steady current signal. That is to say, the present invention realizes the division of charging modes by comparing the voltage-stabilizing signal and the steady-current signal level, and this design can effectively prevent sudden changes in the adjustment value during switching of charging modes, thereby realizing smooth switching of charging modes.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a battery charging control device provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a float control unit provided by an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a voltage setting switching module provided by an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a battery charging control device provided by an embodiment of the present invention. 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 to the voltage loop control module 12, and the voltage loop control module 13 and the current loop control module 14 are both connected to the output competition module.

The charging mode switching module 11 is used to determine a given voltage 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 reference values according to different charging trigger signals. That is, different charging trigger signals correspond to different given voltage values.

Wherein, the charging trigger signal is divided according to the charging mode, for example, the charging trigger signal may be a pre-charging trigger signal, an equalizing charging trigger signal or a floating charging trigger signal.

The voltage loop control module 12 is used for generating a voltage stabilization signal according to a given voltage value and an output voltage value of an externally input target battery.

In this embodiment, the voltage loop control module 12 can be implemented based on a comparator circuit, the positive input terminal of the comparator circuit is used to receive the output voltage value of the target battery input from the outside, and the negative input terminal is used to input a given voltage value. The output end is used for outputting a voltage-stabilized signal.

The current loop control module 13 is used to generate a steady current signal according to an externally input current given value and an externally input target battery charging current value.

In this embodiment, the current loop control module 13 can be implemented based on a comparator circuit. The positive input terminal of the comparator circuit is used to receive the charging current value of the target battery input from the outside, and the negative input terminal is used to receive the current input from the external input. Fixed value, the output terminal is used to output steady current signal.

The output competition module 14 is used for outputting the signal with a lower level among the steady voltage signal and the steady current signal as the charging control signal of the target battery.

In this embodiment, the output competition module 14 determines the charging control signal according to the levels of the voltage stabilization signal and the current stabilization signal. That is to say, the present invention realizes the division of charging modes by comparing the voltage-stabilizing signal and the steady-current signal level, and this design can effectively prevent sudden changes in the adjustment value during switching of charging modes, thereby realizing smooth switching of charging modes.

Wherein, the output competition module 14 can be implemented directly based on a pull-up resistor and two diodes, for example, the output competition module can include a first diode, a second diode, and a pull-up resistor.

The first terminal of the pull-up resistor is connected to a preset voltage, and the second terminal is respectively connected to the positive terminal of the first diode and the positive terminal of the second diode; the negative terminal of the first diode is connected to the voltage loop control The output terminal of the module is connected, and the negative terminal of the second diode is connected with the output terminal of the current loop control module; the positive terminal of the first diode and the positive terminal of the second diode constitute the output terminal of the output competition module. The circuit can be used to select a signal with a smaller level among the voltage-regulated signal and the steady-current signal.

Optionally, as a specific implementation of the battery charging control device provided in the embodiment of the present invention, the charging mode switching module includes an equalizing charging control unit, a floating charging control unit, a precharging controlling unit, and a voltage setting switching unit.

The precharge control unit is configured to output a corresponding precharge gate signal according to an externally input precharge trigger signal. The equalization charge control unit is used for outputting a corresponding equalization charge gate signal according to an externally input equalization charge trigger signal. The float charge control unit is used for outputting a corresponding float charge gate signal according to an externally input float charge trigger signal.

The voltage setting value switching module is used to determine the voltage setting value of the voltage loop control module according to the pre-charge strobe signal, the equal charge strobe signal and the float charge strobe signal.

In this embodiment, the pre-charge control unit, equal charge control unit, and floating charge control unit are all connected to the voltage setting value switching unit, and are used to output the pre-charging strobe signal, equalizing charge selection pass signal, float charge strobe signal.

Wherein, the working process of the pre-charge control unit is: when the pre-charge trigger signal is not received, the pre-charge strobe signal output by the pre-charge control unit is at a low level, and after receiving the pre-charge trigger signal, the pre-charge control unit outputs The pre-charge strobe signal will change to a high level (at this time, the corresponding pre-charge line in the voltage setting value switching module will be turned on, and then the voltage setting value in the pre-charging mode will be output).

The working process of the equalizing charge control unit and floating charge control unit is the same. After receiving the equalizing charge trigger signal, the corresponding equalizing charge line in the voltage setting value switching module will be turned on, and the voltage setting value in the equalizing charging mode will be output. , after receiving the floating charging trigger signal, the corresponding floating charging line in the voltage setting value switching module will be turned on, and the voltage setting value in the floating charging mode will be output.

Optionally, the working process of the pre-charging control unit can 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 receiving the pre-charging trigger signal, The precharge strobe signal output by the precharge control unit changes to a low level (at this time, the corresponding precharge line in the voltage given value switching module is turned on, and the voltage given value in the precharge mode is output), that is to say, As long as the pre-charging control unit can change the level according to the pre-charging trigger signal, and the voltage setting value switching unit can recognize this level change and respond in time.

Optionally, as a specific implementation manner of the battery charging control device 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 charge control unit and the floating charge control unit, and is used for realizing the locking between the equalizing charge control unit and the floating charge control unit.

In this embodiment, the realization of the locking between the equalization charge control unit and the floating charge control unit means that at a certain moment, only one unit is running between the equalization charge control unit and the float charge control unit. The purpose of setting the charging mode locking unit is to prevent the equalization charge control unit and float charge control unit from running at the same time.

Optionally, as a specific implementation of the battery charge control device provided in the embodiment of the present invention, the float charge control unit includes a first float charge trigger circuit, a second float charge voltage trigger circuit, and a float charge output circuit.

The input end of the first floating charge trigger circuit is used to receive the externally input charging current value of the target battery and the externally input floating charge current given value of the target battery. The first end of the second floating charging trigger circuit is used to receive a floating charging trigger signal input from the outside.

The output end of the first float trigger circuit and the second end of the second float trigger circuit are both connected to the first end of the float output circuit, and the second end of the float output circuit is used to output a float gate signal.

In this embodiment, the triggering of the floating charging control unit includes two conditions, the first is that the charging current value of the target battery is less than the preset floating charging current given value, and the second is receiving a floating charging trigger signal. Wherein, the floating charge current given value can be set as 15% of the current given value of the aforementioned current loop control module. That is, when the charging current decreases to 15%, the target battery can be controlled to enter the float charging mode.

Wherein, the first float charge trigger circuit can be realized based on a comparator circuit and a diode, the positive input terminal of the comparator circuit receives the charging current value of the target battery input from the outside, and the negative input terminal receives the float charge current value of the target battery input from the outside. Fixed value, the output terminal outputs a high/low level signal. The second float trigger circuit can be implemented based on diodes. For this embodiment, please refer to FIG. 2. FIG. 2 shows an implementation of the first trigger circuit and the second trigger circuit, wherein the first trigger circuit and the second trigger circuit can be controlled by pulling down Realize the conduction of the internal circuit of the floating charge control unit, and then output the corresponding floating charge strobe signal.

Optionally, as a specific implementation manner of the battery charging control device provided in the embodiment of the present invention, the equalization charge control unit includes an equalization charge trigger circuit and an equalization charge output circuit connected in series.

The first end of the equalizing trigger circuit is used to receive an externally input equalizing trigger signal, the second end of the equalizing trigger circuit is connected to the first end of the equalizing output circuit, and the second end of the equalizing output circuit is used to output the equalizing Charge strobe signal.

In this embodiment, the design of the equalizing charge trigger circuit can refer to the second floating charge trigger circuit, both of which are similar and will not be repeated here.

Optionally, as a specific implementation manner of the battery charging control device 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 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 equalizing trigger circuit and the first input end of the first NAND gate, and the floating The first terminal of the charge output circuit is connected with the second input terminal of the first NAND gate, and the output terminal of the first NAND gate is connected with the first terminal of the equalized charge output circuit.

The output terminal of the first NAND gate is connected with the first input terminal of the second NAND gate, and the output terminal of the first floating charge trigger circuit and the second terminal of the second floating charge trigger circuit are all connected with the first input terminal of the second NAND gate. The two input terminals are connected, and the output terminal of the second NAND gate is connected with the second input terminal of the first NAND gate.

In this embodiment, the first comparison circuit is used to output a corresponding high/low level signal according to the steady voltage signal output by the voltage loop control module and the steady current signal output by the current loop control module, and the high/low level signal is used for lock in charging mode.

In this embodiment, the locking between the equalization charge control unit and the floating charge control unit can be realized based on a comparison circuit and a NAND gate. Among them, the first comparison circuit is used to realize the level comparison between the voltage-stabilizing signal and the current-stabilizing signal, and output the level signal corresponding to the current charging mode. Input to the NAND gate. That is to say, this embodiment realizes the independence of the two control units through two NAND gates, realizes the distinction of the charging mode between the two control units through the comparison of the voltage-stabilizing signal and the steady-current signal, and then realizes equalization charging Lockout between control unit and float control unit.

Optionally, as a specific implementation of the battery charging control device provided in the embodiment of the present invention, the voltage setting switching unit includes a first analog switch, a second analog switch, and a third analog switch.

The input terminal of the first analog switch is used to receive the given value of the pre-charge voltage input from the outside, the output terminal of the first analog switch is used to output the given value of the pre-charge voltage, and the gate terminal of the first analog switch is used to receive the pre-charge voltage Precharge strobe signal output by the control unit.

The input terminal of the second analog switch is used to receive the given value of the equalized charging voltage input from the outside, the output terminal of the second analog switch is used to output the given value of the equalized charging voltage, and the gate terminal of the second analog switch is used to receive the given value of the equalized charging voltage. The equalizing charge strobe signal output by the control unit.

The input terminal of the third analog switch is used to receive the given value of floating charge voltage input from the outside, the output terminal of the third analog switch is used to output the given value of floating charge voltage, and the gate terminal of the third analog switch is used to receive the given value of floating charge voltage. The float gate signal output by the 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 together and connected to the voltage loop control module for outputting a given voltage value to the voltage loop control module.

In this embodiment, referring to FIG. 3, the voltage setting switching unit can be implemented based on three analog switches. In FIG. 3, Uref-Bat1 is the pre-charging voltage setting, and Uc-Bat is the pre-charging strobe signal. Uref-jc1 is the given value of the equalizing charge voltage, Uc-jc is the equalizing charge strobe signal, Uref-fc1 is the given value of the float charge voltage, Uc-fc is the float charge strobe signal, and UDC-ref is the voltage loop control module Output voltage given value.

In this embodiment, referring to FIG. 3 , a diode can be set in the voltage setting value switching unit to realize the locking of the precharge mode. The principle is: when the battery is in the precharge mode After), the negative terminals of the two diodes are at low level. In the example in Figure 3, the gate of the analog switch will only be turned on when it receives a high-level signal, so when the battery is in the pre-charge mode, it can prevent The equalizing charging line and floating charging line are turned on to ensure that only the pre-charging line is running.

Optionally, as a specific implementation manner of the battery charging control device provided in the embodiment of the present invention, 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 current value and an externally inputted charging current value of a target battery.

The output competition module is also used to output the signal with a lower level among the voltage stabilizing signal, the steady current signal and the current limiting signal as the charging control signal of the target battery.

In this embodiment, the current-limiting control module is used for short-circuit protection of the battery charging circuit, that is, when the battery charging circuit is short-circuited and the charging current of the target battery is greater than the current-limiting current value, the current is limited in time.

In this embodiment, the current limiting control module can be implemented based on a comparator circuit, the positive input terminal of the comparator circuit is used to receive the charging current value of the target battery input from the outside, and the negative input terminal is used to receive the current limiting current input from the external Value, the output terminal is used to output the current limit signal.

Among them, the current limiting current value can be set as 110% to 125% of the given current value corresponding to the current loop control module (that is, the range of the current limiting current value can be 110%*current given value～125%*current given value value).

It can be seen from the description of the above embodiments that the present invention can realize the charging control of the battery through pure hardware, and thus can be effectively applied to the field of nuclear power. In the field of nuclear power, in order to avoid complex line connections in the prior art, the charging control of the battery is usually realized by software, but software control has defects such as complex algorithms, high detection costs, and low safety. Therefore, a low-cost , High security battery charging control scheme. According to the description of the above-mentioned embodiments of the present invention, the present invention can realize the charging control of the battery through pure hardware, and the circuit structure of the hardware realization mode of the present invention is simple (through the innovative connection of the comparator circuit and other basic circuits, multiple charging control in this mode), there are no defects such as complex algorithms, high detection costs, and low safety, so it effectively solves the problems faced by battery charging control in the field of nuclear power.

Optionally, as a specific implementation manner of the battery charging control device provided in the embodiment of the present invention, the battery charging control device may further include: a voltage sensor.

The voltage sensor is used to detect the output voltage value of the target battery, and transmit 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 in the embodiment of the present invention, the battery charging control device may further include: a current sensor.

The current sensor is used to detect the charging current value of the target battery, and transmit the charging current value of the target battery to the current loop control module.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or modifications within the technical scope disclosed in the present invention. Replacement, these modifications or replacements shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (9)

1. A battery charging control device, characterized in that, comprising: Charging mode switching module, voltage loop control module, current loop control module, output competition module and current limiting control module; The charging mode switching module is connected to 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 to the output competition module; The charging mode switching module is used to determine a given voltage value of the voltage loop control module according to an externally input charging trigger signal; wherein, the charging trigger signal is a pre-charge trigger signal, an equal charge trigger signal or a floating charge trigger signal , different charging trigger signals correspond to different voltage given values; The voltage loop control module is used to generate a voltage stabilization signal according to the given voltage value and the output voltage value of the target battery input from the outside; The charging current value of the target battery generates a steady current signal; the current limiting control module is used to output the current limiting signal according to the externally input current limiting current value and the charging current value of the target battery input externally; the output competition module is used to The signal with a lower level among the voltage stabilizing signal, the current stabilizing signal and the current limiting signal is output as the charging control signal of the target battery. 2. The battery charging control device according to claim 1, wherein the charging mode switching module comprises an equalizing charging control unit, a float charging control unit, a pre-charging control unit, and a voltage setting switching unit; The pre-charging control unit is used to output a corresponding pre-charging strobe signal according to an externally input pre-charging trigger signal; the equalizing charge control unit is used to output a corresponding equalizing charging strobe signal according to an externally input equalizing charging trigger signal; The float charge control unit is used to output a corresponding float charge strobe signal according to an externally input float charge trigger signal; The voltage setting value switching module is used to determine the voltage setting 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 charging control device according to claim 2, wherein the charging mode switching module further comprises a charging mode locking unit; The charging mode locking unit is connected between the equalization charging control unit and the floating charging control unit, and is used for realizing the locking between the equalizing charging control unit and the floating charging control unit. 4. The battery charging control device according to claim 3, wherein the float charge control unit comprises a first float charge trigger circuit, a second float charge trigger circuit, and a float charge output circuit; The input terminal of the first floating charge trigger circuit is used to receive the charging current value of the target battery input externally and the floating charge current given value of the target battery input externally; the first terminal of the second float charge trigger circuit is used for To receive the floating charge trigger signal input from the outside; The output end of the first float trigger circuit and the second end of the second float trigger circuit are connected to the first end of the float output circuit, and the second end of the float output circuit is used for Output float strobe signal. 5. The battery charging control device according to claim 4, wherein the equalization control unit comprises an equalization trigger circuit and an equalization output circuit connected in series; The first end of the equalizing trigger circuit is used to receive an externally input equalizing trigger signal, the second end of the equalizing trigger circuit is connected to the first end of the equalizing output circuit, and the equalizing output circuit The second terminal is used to output equalizing strobe signal. 6. The battery charging control device according to claim 5, wherein the charging mode locking unit comprises a first comparison circuit and a deadlock circuit; The deadlock circuit includes a first NAND gate and a second NAND gate; The input terminal of the first comparison circuit is respectively connected to the voltage loop control module and the current loop control module, and the output terminal of the first comparison circuit is connected to the second terminal of the equalizing trigger circuit, the second The first input end of a NAND gate is connected, the first end of the floating charge output circuit is connected with the second input end of the first NAND gate, the output end of the first NAND gate is connected with the equalizing The first end of the charge output circuit is connected; The output end of the first NAND gate is connected to the first input end of the second NAND gate, and the output end of the first floating charge trigger circuit and the second end of the second float charge trigger circuit are both connected to the second input end of the second NAND gate, and the output end of the second NAND gate is connected to the second input end of the first NAND gate. 7. The battery charging control device according to claim 2, wherein the switching unit for a given voltage value comprises a first analog switch, a second analog switch, and a third analog switch; The input end of the first analog switch is used to receive a given value of the precharge voltage input from the outside, the output end of the first analog switch is used to output the given value of the precharge voltage, and the first analog switch The gate terminal is used to receive the precharge gate signal output by the precharge control unit; The input terminal of the second analog switch is used to receive a given value of the equalized charging voltage input from the outside, and the output terminal of the second analog switch is used to output the given value of the equalized charging voltage. The strobe terminal is used to receive the equalized charge gate signal output by the equalized charge control unit; The input end of the third analog switch is used to receive a given value of floating charge voltage input from the outside, the output end of the third analog switch is used to output the given value of floating charge voltage, and the set value of the floating charge voltage of the third analog switch is The gate terminal is used to receive the float gate signal output by the float 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 to the voltage loop control module after being connected together, and are used to connect to the voltage loop control module Output voltage given value. 8. The battery charging control device according to claim 1, further comprising: voltage sensor; The voltage sensor is used to detect the output voltage value of the target battery, and transmit the output voltage value of the target battery to the voltage loop control module. 9. The battery charging control device according to claim 1, further comprising: current sensor; The current sensor is used to detect the charging current value of the target battery, and transmit the charging current value of the target battery to the current loop control module.

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