Power-distributable charger

Abstract

The application provides a power-distributable charger, which comprises a rectifier circuit, a charging module and a controller; the rectifier circuit is in communication connection with the controller; the rectifier circuit is electrically connected with the charging module; the charging module is in bus control connection with the controller; the rectifier circuit is used for converting alternating current into direct current; the charging module comprises a plurality of parallelly connected direct-current-to-direct-current conversion units, and the direct-current-to-direct-current conversion units are used for forming a single charging power supply; the charging module is used for charging a battery; and the controller controls the rectifier circuit to provide direct current for the charging module and controls the charging module to charge the battery. The power-distributable charger provided by the application can flexibly distribute power, flexibly configure output voltage and meet the charging requirements of a battery system in multiple scenes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible charging, in particular to a power-distributable charger. BACKGROUND

[0002] In recent years, as a new, energy-saving and efficient short-distance electric transportation tool, including electric forklifts, electric unmanned vehicles, automatic track vehicles, electric patrol vehicles, electric motorcycles and electric bicycles, etc., because of the convenience of power supply, the emission of no pollution, the low noise during operation, it is increasingly widely used in production and life; The corresponding charging demand: fast, efficient and convenient also gradually increases. Compared with the two charging methods of DC high-power charging phase and AC charging method, the DC high-power charging phase has the advantages of high charging rate (large current), high charging safety (low output voltage), energy centralized management (simple layout and application) compared with the AC charging method, and is more and more concerned and applied; The power-distributable charger can be applied to electric vehicles of different power sizes and electric vehicles of different voltage grades at the same time, and has a wide application prospect.

[0003] The output of the electric charger on the current market is connected to the electric vehicle on-board charger or non-vehicle charger input port through AC charging; There are two obvious problems: first, the charging power is subject to the vehicle on-board charger OBC or non-vehicle charger, the vehicle on-board charger is subject to the compact size in the vehicle, and the power is generally not large, only 200W-2KW, the non-vehicle charger is subject to the requirement of portability and the current limit of 220V household AC socket, and the power is relatively small; The second is that the range of acceptable battery specifications is narrow, 48V, 60V, 72V conventional lead-acid or iron phosphate lithium battery can be charged, but with the improvement of battery technology, 24V, 200V-300V voltage grade, manganese acid lithium battery, sodium ion battery, nickel hydrogen battery and other battery packs are also widely used.

[0004] Therefore, a power-distributable charger is needed. SUMMARY

[0005] The present application provides a power-distributable charger, which can flexibly distribute power and flexibly configure output voltage. Different voltage grade battery systems can be charged in one power network, the charger intelligently distributes power size to the battery system, reducing human operation; One specification charger can be applied to multiple models of battery systems, avoiding the mixing of multiple models of charging equipment, and meeting the charging requirements of battery systems in multiple scenarios.

[0006] The application provides a power-distributable charger, which comprises a rectifier circuit, a charging module and a controller, the rectifier circuit is in communication connection with the controller, the rectifier circuit is electrically connected with the charging module, the charging module is in bus control connection with the controller, the rectifier circuit is used for converting alternating current into direct current, the charging module comprises a plurality of parallelly connected direct-current-to-direct-current conversion units, the direct-current-to-direct-current conversion units are used for forming a single charging power supply, the charging module is used for charging a battery, and the controller controls the rectifier circuit to provide direct current for the charging module and controls the charging module to charge the battery.

[0007] Further, the rectifier circuit converts the input power supply into a certain level according to the total power value of the charger; the level conversion comprises the following steps: if the total power value of the charger is greater than 6KW, three-phase 380V alternating current is inputted and converted into 110V direct current; otherwise, single-phase 220V alternating current is inputted and converted into 110V direct current.

[0008] Further, the direct-current-to-direct-current conversion units in the charging module are designed in an isolation mode, the direct-current-to-direct-current conversion units input 110V direct current and output 24V to 110V direct current or 110V to 300V direct current.

[0009] Further, the direct-current-to-direct-current conversion units comprise in-use direct-current-to-direct-current conversion units and redundant direct-current-to-direct-current conversion units, the number of the in-use direct-current-to-direct-current conversion units is configured according to the charging power demand of the battery; if the in-use direct-current-to-direct-current conversion units cannot be used, the preset redundant direct-current-to-direct-current conversion units are controlled to work.

[0010] Further, the controller obtains the charging power demand and the charging voltage demand of the battery, and controls the charging module to charge the battery according to the charging power demand and the charging voltage demand.

[0011] Further, the current effective value of the alternating current obtained by the rectifier circuit is calculated according to the total power value of the charger, and the formula for calculating the current effective value is as follows:

[0012]

[0013] In the above formula, I represents the current effective value of the alternating current, P represents the total power value of the charger, U represents the voltage of the alternating current, sinwt represents the calculation of a synchronous sine signal, w represents an angular frequency, and t represents time. a(t) a In the above formula, I represents the current effective value of the alternating current, P represents the total power value of the charger, U represents the voltage of the alternating current, sinwt represents the calculation of a synchronous sine signal, w represents an angular frequency, and t represents time.

[0014] Further, the controller controls the charging module to charge the battery after obtaining the total control current value of the charger.

[0015] ​The total control current value is obtained by summing up the current effective value of the alternating current, the DC side capacitor current value after the rectifier circuit, the compensation current value of the unbalanced current in the circuit, and the charging current demand value of the battery.

[0016] Further, the controller controls the rectifier circuit to provide power for the charging module, and controls the charging module to charge the battery, including:

[0017] obtaining the charging voltage demand value and the charging current demand value of the battery;

[0018] obtaining the maximum output voltage and the maximum output current that the charging module can provide; determining whether the maximum output voltage and the maximum output current that the charging module can provide meet the demand of the battery, if yes, controlling the charging module to work according to the maximum output voltage and the maximum output current, if not, controlling the preset redundant DC-DC conversion unit to work and then controlling the charging module to work according to the maximum output voltage and the maximum output current; the control module monitors the charging process of the battery, and when the charging state of the battery reaches a preset optimal charging state, the control module controls the charging module to stop working.

[0019] Further, it further includes an adaptive charging module for establishing an adaptive timing charging model according to the demand of the battery, and automatically stopping charging when the charging state of the battery reaches a preset optimal charging state; the adaptive charging module includes:

[0020] obtaining the historical charging work data of the charging machine;

[0021] establishing an adaptive charging monitoring function based on three parameters of the historical battery demand, the historical battery charging end time, and the historical DC-DC conversion unit configuration quantity according to the historical charging work data, and obtaining an adaptive charging monitoring function value by using the adaptive charging monitoring function; when the adaptive charging monitoring function value reaches a preset optimal value, the battery charging is completed;

[0022] establishing a matching relationship library of the battery demand, the DC-DC conversion unit configuration quantity, and the battery charging time according to the optimal value;

[0023] obtaining the demand of the battery to be charged, matching the charging time of the battery to be charged and the DC-DC conversion unit configuration quantity according to the matching relationship library, and automatically charging according to the timing program set according to the charging time of the battery to be charged and the DC-DC conversion unit configuration quantity.

[0024] Further, it further includes a DC-DC conversion unit configuration management module for reasonably configuring the number of DC-DC conversion units to ensure the safety and durability of the charging efficiency of the charging machine; the DC-DC conversion unit configuration management module includes:

[0025] Obtain the use cycle data, the fault frequency data and the charging efficiency data of the DC-DC conversion unit based on historical data of the DC-DC conversion unit configuration;

[0026] According to the fault frequency data and the use cycle data, the health value of the DC-DC conversion unit is evaluated according to a preset health value evaluation condition; and according to the charging efficiency data, the current charging efficiency value of the DC-DC conversion unit is calculated according to a preset calculation standard;

[0027] The health value and the current charging efficiency value of the DC-DC conversion unit are weighted and accumulated, and then the average value is obtained to obtain the safe and stable power supply evaluation value of the DC-DC conversion unit; the power supply safety risk value of the DC-DC conversion unit is set according to the safe and stable power supply evaluation value of the DC-DC conversion unit combined with the current charging efficiency value; and the DC-DC conversion unit is grouped and combined in quantity according to the safe and stable power supply evaluation value and the power supply safety risk value, to obtain a plurality of DC-DC conversion unit groups;

[0028] According to the demand power of the charging battery, the DC-DC conversion unit group is selected for charging.

[0029] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and achieved by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0030] The technical solutions of the present application will be further described in detail below with the help of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0032] Figure 1 It is a power distributable charging machine structure schematic diagram of the present application;

[0033] Figure 2 It is a power distributable charging machine total control current value composition schematic diagram of the present application;

[0034] Figure 3 It is a power distributable charging machine charging control method step schematic diagram of the present application. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application will be described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and do not limit the present application.

[0036] The application provides a power-distributable charger, such as Figure 1 As shown, the charger comprises a rectifier circuit, a charging module and a controller; the rectifier circuit is in communication connection with the controller; the rectifier circuit is electrically connected with the charging module; the charging module is in bus control connection with the controller; the rectifier circuit is used for converting alternating current into direct current; the charging module comprises a plurality of parallelly connected direct-current-to-direct-current conversion units, and the direct-current-to-direct-current conversion units are used for forming a single charging power supply; the charging module is used for charging a battery; and the controller controls the rectifier circuit to provide direct current for the charging module and controls the charging module to charge the battery.

[0037] The working principle of the above technical solution is as follows: the charger comprises a rectifier circuit, a charging module and a controller; the rectifier circuit is in communication connection with the controller; the rectifier circuit is electrically connected with the charging module; the charging module is in bus control connection with the controller; the rectifier circuit is used for converting alternating current into direct current; the charging module comprises a plurality of parallelly connected direct-current-to-direct-current conversion units, and the direct-current-to-direct-current conversion units are used for forming a single charging power supply; the charging module is used for charging a battery; and the controller controls the rectifier circuit to provide direct current for the charging module and controls the charging module to charge the battery.

[0038] The above technical solution has the following beneficial effects: the scheme provided in the embodiment can flexibly distribute power and flexibly configure output voltage; battery systems of different voltage grades can be charged in one power supply network; the charger intelligently distributes power to the battery system, reducing manual operation; one specification of charger can be applied to multiple models of battery systems, avoiding the mixing of multiple models of charging equipment, and meeting the charging requirements of battery systems in multiple scenarios.

[0039] In one embodiment, the rectifier circuit converts the level of the accessed mains power according to the total power value of the charger; the level conversion comprises: if the total power value of the charger is greater than 6KW, three-phase 380V alternating current is accessed, and the three-phase 380V alternating current is converted into 110V direct current; otherwise, single-phase 220V alternating current is accessed, and the single-phase 220V alternating current is converted into 110V direct current.

[0040] The working principle of the above technical solution is as follows: the rectifier circuit converts the level of the accessed mains power according to the total power value of the charger; the level conversion comprises: if the total power value of the charger is greater than 6KW, three-phase 380V alternating current is accessed, and the three-phase 380V alternating current is converted into 110V direct current; otherwise, single-phase 220V alternating current is accessed, and the single-phase 220V alternating current is converted into 110V direct current.

[0041] The above technical solution has the following beneficial effects: by selecting different alternating currents for access, the scheme provided in the embodiment can ensure the extensive use of the rectifier circuit.

[0042] In one embodiment, the DC-DC conversion unit in the charging module adopts an isolated design, the DC-DC conversion unit inputs 110V DC power, and the output current is 24V-110V DC power or 110V-300V DC power.

[0043] The working principle of the above technical solution is that the DC-DC conversion unit in the charging module adopts an isolated design, the DC-DC conversion unit inputs 110V DC power, and the output current is 24V-110V DC power or 110V-300V DC power.

[0044] The beneficial effects of the above technical solution are that by adopting the scheme provided in the embodiment, the DC-DC conversion unit is designed in an isolated manner, the configuration and combination of the DC-DC conversion unit are facilitated, and the charging efficiency and flexible operation of the charging module can be ensured.

[0045] In one embodiment, the DC-DC conversion unit includes in-use DC-DC conversion units and redundant DC-DC conversion units, the number of in-use DC-DC conversion units is configured according to the charging power requirement of the battery, and if the in-use DC-DC conversion unit cannot be used, the preset redundant DC-DC conversion unit is controlled to work.

[0046] The working principle of the above technical solution is that the DC-DC conversion unit includes in-use DC-DC conversion units and redundant DC-DC conversion units, the number of in-use DC-DC conversion units is configured according to the charging power requirement of the battery, and if the in-use DC-DC conversion unit cannot be used, the preset redundant DC-DC conversion unit is controlled to work.

[0047] The beneficial effects of the above technical solution are that by distinguishing the in-use DC-DC conversion unit and the redundant DC-DC conversion unit, the charging can be carried out safely, reliably and stably.

[0048] In one embodiment, the controller obtains the charging power requirement and the charging voltage requirement of the battery, and controls the charging module to charge the battery according to the charging power requirement and the charging voltage requirement.

[0049] The working principle of the above technical solution is that the controller obtains the charging power requirement and the charging voltage requirement of the battery, and controls the charging module to charge the battery according to the charging power requirement and the charging voltage requirement.

[0050] The beneficial effects of the above technical solution are that by obtaining the charging power requirement and the charging voltage requirement through the controller, the charging module is controlled to charge the battery, and the charging process can be controlled scientifically and accurately.

[0051] In one embodiment, according to the size of the total power value of the charger, the current effective value of the alternating current obtained by the rectifier circuit is calculated, and the current effective value calculation formula is:

[0052]

[0053] In the above formula, I a(t) represents the current effective value of the alternating current, P represents the total power value of the charger, U a represents the voltage of the alternating current, sinwt represents the calculation of the synchronous sine signal, w represents the angular frequency, and t represents the time.

[0054] The working principle of the above technical solution is that constant current constant voltage charging is the most widely used charging method at present. During charging, a fixed rate current set in advance is used to charge the battery. In order to obtain the fixed rate current, the current effective value of the alternating current obtained by the rectifier circuit is calculated according to the size of the total power value of the charger, and the current effective value calculation formula is:

[0055]

[0056] In the above formula, I a(t) represents the current effective value of the alternating current, P represents the total power value of the charger, U a represents the voltage of the alternating current, sinwt represents the calculation of the synchronous sine signal, w represents the angular frequency, and t represents the time.

[0057] The beneficial effects of the above technical solution are that by calculating the current effective value of the alternating current, the rectifier circuit can provide sufficient charging current required by the subsequent stage, and data reference is provided for further obtaining the total control current of the charger.

[0058] In one embodiment, as Figure 2 shown, the controller obtains the total control current value of the charger, and controls the charging module to charge the battery.

[0059] The total control current value is obtained by summing and calculating the current effective value of the alternating current, the direct current side capacitor current value after the rectifier circuit, the compensation current value of the unbalanced current in the circuit, and the charging current demand value of the battery.

[0060] The working principle of the above technical solution is that the controller obtains the total control current value of the charger, and controls the charging module to charge the battery.

[0061] The total control current value is obtained by summing and calculating the current effective value of the alternating current, the direct current side capacitor current value after the rectifier circuit, the compensation current value of the unbalanced current in the circuit, and the charging current demand value of the battery.

[0062] The beneficial effects of the above technical solutions are: by using the scheme provided in the embodiment, various factors affecting the total control current value can be fully considered through calculation of the total control current value, and the accuracy of the total control current of the charger is ensured.

[0063] In one embodiment, as shown in FIG. 1, a controller controls a rectifier circuit to provide power for a charging module and controls the charging module to charge a battery, including: Figure 3

[0064] obtaining a charging voltage requirement value and a charging current requirement value of the battery;

[0065] obtaining a maximum output voltage and a maximum output current that the charging module can provide; determining whether the maximum output voltage and the maximum output current that the charging module can provide meet the requirement of the battery, if yes, controlling the charging module to work according to the maximum output voltage and the maximum output current, if not, controlling a preset redundant DC-DC conversion unit to work and then controlling the charging module to work according to the maximum output voltage and the maximum output current; and monitoring a charging process of the battery by the control module, and stopping the charging module when a charging state of the battery reaches a preset optimal charging state.

[0066] The working principle of the above technical solutions is: the controller controls the rectifier circuit to provide power for the charging module and controls the charging module to charge the battery, including:

[0067] obtaining a charging voltage requirement value and a charging current requirement value of the battery;

[0068] obtaining a maximum output voltage and a maximum output current that the charging module can provide; determining whether the maximum output voltage and the maximum output current that the charging module can provide meet the requirement of the battery, if yes, controlling the charging module to work according to the maximum output voltage and the maximum output current, if not, controlling a preset redundant DC-DC conversion unit to work and then controlling the charging module to work according to the maximum output voltage and the maximum output current; and monitoring a charging process of the battery by the control module, and stopping the charging module when a charging state of the battery reaches a preset optimal charging state.

[0069] ​During the charging process by using the charger, the temperature of the battery is a parameter that needs to be monitored. If the battery is charged at a high charging rate, the temperature of the battery will be increased, which will affect the service life of the battery and even cause thermal runaway. By monitoring the temperature change of the battery by the controller, the hidden danger of the temperature increase of the battery can be found in time, and if the temperature of the battery is higher than the preset temperature threshold, an alarm prompt is given in time. By calculating the total heat power of the battery, the temperature change of the battery can be obtained. The factors affecting the total heat power of the battery include the reversible heat power caused by the entropy change in the chemical reaction of the battery, the polarization heat power generated by the polarization reaction in the charging and discharging process of the battery, the Joule heat power caused by the ohmic resistance, and the heat power transferred to the environment. The calculation formula of the total heat power of the battery is:

[0070] P = P1 + I 2 *R jh + I 2 *R om - δ * B * (T n -T h )

[0071] In the above formula, P represents the total heat power of the battery, P1 represents the reversible heat power caused by the entropy change in the chemical reaction of the battery, R jh represents the polarization resistance, R om represents the ohmic resistance, I represents the charging current of the battery, δ represents the heat transfer coefficient, B represents the surface area of the battery, T n represents the surface temperature of the battery, and T h represents the ambient temperature of the battery.

[0072] The beneficial effects of the above technical solution are: by using the scheme provided in the embodiment, the charging voltage demand value and the charging current demand value of the battery are obtained, and the maximum output voltage and the maximum output current that can be provided by the charging module are obtained and judged, so that the charging module can be controlled to work according to the maximum output voltage and the maximum output current, and the scientific control level of charging is improved. By monitoring the total heat power of the battery by the controller, the hidden danger of the temperature increase of the battery can be found in time, and if the temperature of the battery is higher than the preset temperature threshold, an alarm prompt is given in time, which is beneficial to the scientific monitoring and safe charging of the battery.

[0073] In one embodiment, it further includes an adaptive charging module for establishing an adaptive timing charging model according to the required power of the battery, and automatically stopping charging when the charging state of the battery reaches a preset optimal charging state. The adaptive charging module includes:

[0074] Obtain the historical charging work data of the charger;

[0075] According to historical charging work data, an adaptive charging monitoring function based on three parameters of historical battery demand power, historical battery charging end time and historical DC-DC conversion unit configuration quantity is established, and an adaptive charging monitoring function value is calculated by using the adaptive charging monitoring function; when the adaptive charging monitoring function value reaches a preset optimal value, the battery charging is ended;

[0076] According to the optimal value, a matching relationship database of battery demand power, DC-DC conversion unit configuration quantity and battery charging time is established;

[0077] The demand power of a battery to be charged is obtained, the battery charging time and the DC-DC conversion unit configuration quantity are matched and obtained according to the matching relationship database, and automatic charging is performed according to the timing program set according to the battery charging time and the DC-DC conversion unit configuration quantity.

[0078] The working principle of the above technical solution is that: the adaptive charging module is further included, which is used for establishing an adaptive timing charging model according to the demand power of the battery, and automatically stopping charging when the battery charging state reaches a preset optimal charging state; the adaptive charging module includes:

[0079] The historical charging work data of the charger is obtained;

[0080] According to the historical charging work data, an adaptive charging monitoring function based on three parameters of historical battery demand power, historical battery charging end time and historical DC-DC conversion unit configuration quantity is established, and an adaptive charging monitoring function value is calculated by using the adaptive charging monitoring function; when the adaptive charging monitoring function value reaches a preset optimal value, the battery charging is ended;

[0081] According to the optimal value, a matching relationship database of battery demand power, DC-DC conversion unit configuration quantity and battery charging time is established;

[0082] The demand power of a battery to be charged is obtained, the battery charging time and the DC-DC conversion unit configuration quantity are matched and obtained according to the matching relationship database, and automatic charging is performed according to the timing program set according to the battery charging time and the DC-DC conversion unit configuration quantity.

[0083] The beneficial effects of the above technical solution are that: by using the scheme provided in the embodiment, an adaptive timing charging model is established according to the demand power of the battery, and the charging is automatically stopped when the battery charging state reaches a preset optimal charging state, so that the intelligent charging level and the charging efficiency of the charger can be improved.

[0084] In one embodiment, a DC-DC conversion unit configuration management module is further included for reasonably configuring the number of DC-DC conversion units to ensure the safe and persistent charging efficiency of the charger; the DC-DC conversion unit configuration management module includes:

[0085] Based on the historical data of the DC-DC conversion unit configuration, usage cycle data, fault frequency data and charging efficiency data of the DC-DC conversion unit are obtained;

[0086] According to the fault frequency data and the usage cycle data, the health value of the DC-DC conversion unit is evaluated according to a preset health value evaluation condition; according to the charging efficiency data, the current charging efficiency value of the DC-DC conversion unit is calculated according to a preset calculation standard;

[0087] The health value and the current charging efficiency value of the DC-DC conversion unit are weighted and accumulated, and then the average value is obtained to obtain the safe and stable power supply evaluation value of the DC-DC conversion unit; according to the safe and stable power supply evaluation value of the DC-DC conversion unit, the current charging efficiency value is combined to set the power supply safety risk value of the DC-DC conversion unit; according to the safe and stable power supply evaluation value and the power supply safety risk value, the DC-DC conversion unit is grouped and combined in number to obtain a plurality of DC-DC conversion unit groups;

[0088] According to the demand power of the charging battery, the DC-DC conversion unit group is selected for charging.

[0089] The working principle of the above technical solution is: a DC-DC conversion unit configuration management module is further included for reasonably configuring the number of DC-DC conversion units to ensure the safe and persistent charging efficiency of the charger; the DC-DC conversion unit configuration management module includes:

[0090] Based on the historical data of the DC-DC conversion unit configuration, usage cycle data, fault frequency data and charging efficiency data of the DC-DC conversion unit are obtained;

[0091] According to the fault frequency data and the usage cycle data, the health value of the DC-DC conversion unit is evaluated according to a preset health value evaluation condition; according to the charging efficiency data, the current charging efficiency value of the DC-DC conversion unit is calculated according to a preset calculation standard;

[0092] The safe and steady power supply evaluation value of the DC-DC conversion unit is obtained by weighting and accumulating the health value and the current charging efficiency value of the DC-DC conversion unit and then averaging the values; the power supply safety risk value of the DC-DC conversion unit is set according to the safe and steady power supply evaluation value of the DC-DC conversion unit and in combination with the current charging efficiency value; and the DC-DC conversion units are grouped and combined in quantity according to the safe and steady power supply evaluation value and the power supply safety risk value, thereby obtaining a plurality of DC-DC conversion unit groups.

[0093] According to the required power of the charging battery, the DC-DC conversion unit group is selected for charging.

[0094] The above technical solution has the following beneficial effects: by using the scheme provided in the embodiment, the configuration quantity of the DC-DC conversion unit is obtained by analyzing the safe and steady power supply evaluation value obtained by combining the health value and the current charging efficiency value of the DC-DC conversion unit and the power supply safety risk value, thereby ensuring the rationality of the configuration of the DC-DC conversion unit and facilitating the safe and persistent performance of the charging efficiency of the charger.

[0095] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A power-distributable charger, characterized in that, The charger comprises a rectifier circuit, a charging module and a controller; the rectifier circuit is in communication connection with the controller; the rectifier circuit is electrically connected with the charging module; the charging module is in bus control connection with the controller; the rectifier circuit is used for converting alternating current into direct current; the charging module comprises a plurality of parallelly connected direct-current-to-direct-current conversion units, and the direct-current-to-direct-current conversion units are used for forming a single charging power supply; the charging module is used for charging a battery; the controller controls the rectifier circuit to provide direct current for the charging module and controls the charging module to charge the battery; The charger further comprises an adaptive charging module, which is used for establishing an adaptive timing charging model according to the required power of the battery, and automatically stopping charging when the charging state of the battery reaches a preset optimal charging state. The adaptive charging module comprises: obtaining historical charging working data of the charger; According to the historical charging working data, an adaptive charging monitoring function based on three parameters of historical battery required power, historical battery charging end time and historical direct-current-to-direct-current conversion unit configuration quantity is established, and an adaptive charging monitoring function value is calculated by using the adaptive charging monitoring function; when the adaptive charging monitoring function value reaches a preset optimal value, the battery charging is completed; According to the optimal value, a matching relationship database of the battery required power, the direct-current-to-direct-current conversion unit configuration quantity and the battery charging time is established; The required power of the battery to be charged is obtained, and the charging time of the battery to be charged and the configuration quantity of the direct-current-to-direct-current conversion unit are matched according to the matching relationship database; a timing program is set according to the charging time of the battery to be charged and the configuration quantity of the direct-current-to-direct-current conversion unit, and automatic charging is performed.

2. The power-distributable charger of claim 1, wherein, The rectifier circuit converts the input power according to the total power value of the charger; the level conversion comprises: if the total power value of the charger is greater than 6KW, three-phase 380V alternating current is connected, and the three-phase 380V alternating current is converted into 110V direct current; otherwise, single-phase 220V alternating current is connected, and the single-phase 220V alternating current is converted into 110V direct current.

3. The power-distributable charger of claim 1, wherein, The direct-current-to-direct-current conversion unit in the charging module adopts an isolation type design, and the direct-current-to-direct-current conversion unit inputs 110V direct current and outputs a current of 24V to 110V direct current or 110V to 300V direct current.

4. The power-distributable charger of claim 3, wherein, The direct-current-to-direct-current conversion unit comprises an in-use direct-current-to-direct-current conversion unit and a redundant direct-current-to-direct-current conversion unit, and the number of the in-use direct-current-to-direct-current conversion unit is configured according to the charging power requirement of the battery; if the in-use direct-current-to-direct-current conversion unit cannot be used, the preset redundant direct-current-to-direct-current conversion unit is controlled to work.

5. The power-distributable charger of claim 1, wherein, The controller obtains the charging power requirement and the charging voltage requirement of the battery, and controls the charging module to charge the battery according to the charging power requirement and the charging voltage requirement.

6. The power-distributable charger of claim 5, wherein, The controller obtains the total control current value of the charger, and controls the charging module to charge the battery; The total control current value is obtained by summing the current effective value of the alternating current, the direct current value of the capacitor after the rectifier circuit, the compensation current value of the unbalanced current in the circuit and the charging current requirement value of the battery.

7. The power-distributable charger of claim 1, wherein, The controller controls the rectifier circuit to provide power for the charging module and controls the charging module to charge the battery, which comprises: Obtain a charging voltage requirement value and a charging current requirement value of the battery; Obtain a maximum output voltage and a maximum output current that the charging module can provide; determine whether the maximum output voltage and the maximum output current that the charging module can provide meet the requirements of the battery; if yes, control the charging module to work according to the maximum output voltage and the maximum output current; if not, control a preset redundant DC-DC conversion unit to work, and then control the charging module to work according to the maximum output voltage and the maximum output current; and control the charging process of the battery by the control module, and stop the charging module when the charging state of the battery reaches a preset optimal charging state.

8. The power-distributable charger of claim 1, wherein, The DC-DC conversion unit configuration management module is further included to reasonably configure the number of DC-DC conversion units and ensure the safe and long-lasting charging performance of the charger. Based on the historical data of the DC-DC conversion unit configuration, obtain the usage cycle data, the fault frequency data and the charging performance data of the DC-DC conversion unit; According to the fault frequency data and the usage cycle data, obtain the health value of the DC-DC conversion unit according to a preset health value evaluation condition; and according to the charging performance data, obtain the current charging performance value of the DC-DC conversion unit according to a preset calculation standard; After weighting and accumulating the health value and the current charging performance value of the DC-DC conversion unit, obtain the safe and stable power supply evaluation value of the DC-DC conversion unit by averaging; set the power supply safety risk value of the DC-DC conversion unit according to the safe and stable power supply evaluation value and the current charging performance value; and group and combine the DC-DC conversion units according to the safe and stable power supply evaluation value and the power supply safety risk value to obtain a plurality of DC-DC conversion unit groups; According to the required power of the charging battery, select a DC-DC conversion unit group for charging.

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