Charging devices, multi-battery charging systems and charging cabinets

Abstract

The present application provides a charging device, a multi-battery charging system and a charging cabinet. It includes an AC / DC conversion circuit, a processor, multiple DC / DC charging circuits, multiple micro control units and a charging management unit. The AC / DC conversion circuit is used to electrically connect to an AC power source. The processor is electrically connected to the AC / DC conversion circuit, and is used to obtain the AC voltage, AC current, and frequency of the AC power input, and to obtain the first voltage and first current output by the AC / DC conversion circuit. Each DC / DC charging circuit is electrically connected to the AC / DC conversion circuit. The DC / DC charging circuit is used to electrically connect a battery pack to be charged. Each micro control unit is electrically connected to a DC / DC charging circuit. The charging management unit is used to adjust the output power of the output end of the DC / DC charging circuit through each micro control unit based on the AC voltage, AC current, frequency, first voltage, first current, second voltage, and second current.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a charging device, a multi-battery charging system and a charging cabinet. Background Art

[0002] At present, battery charging power supplies are widely used in battery charging occasions or equipment, such as electric bicycle chargers. Most of the charging power supplies on the market can only charge a single battery. In order to charge a group of batteries at the same time, the method used is to combine multiple independent charging power supplies (such as charging cabinets).

[0003] The device for charging multiple batteries simultaneously combines single controllable or uncontrollable charging power sources, controls the charging power sources through relays or communication interfaces, and then directly connects these charging power sources in parallel to an AC 220V power source. When in use, the 220V is converted into a DC (direct current) charging voltage to charge the batteries.

[0004] Devices for charging multiple batteries simultaneously have the disadvantages of low charging efficiency, large heat loss and low battery turnover rate because they use a single charging power source. Summary of the invention

[0005] Based on this, it is necessary to provide a charging device, a multi-battery charging system and a charging cabinet to address the problems of low charging efficiency, large heat loss and low battery turnover rate in existing devices for charging multiple batteries at the same time due to the use of a single charging power supply.

[0006] A charging device, comprising:

[0007] An AC / DC conversion circuit, wherein an input end of the AC / DC conversion circuit is used to electrically connect to an AC power source;

[0008] A processor, electrically connected to the AC / DC conversion circuit, configured to obtain the AC voltage, AC current, and frequency of the AC power input, and to obtain the first voltage and first current output by the output end of the AC / DC conversion circuit;

[0009] A plurality of DC / DC charging circuits, wherein the input end of each DC / DC charging circuit is electrically connected to the output end of the AC / DC conversion circuit, and the output end of each DC / DC charging circuit is used to electrically connect to a battery pack to be charged;

[0010] a plurality of micro control units, each of which is electrically connected to one of the DC / DC charging circuits, and is used to obtain a second voltage and a second current at an output end of the DC / DC charging circuit; and

[0011] a charging management unit, electrically connected to the processor and the plurality of micro control units, respectively, for obtaining the AC voltage, the AC current, the frequency, the first voltage, the first current, the second voltage and the second current, and adjusting the output power of the output end of the DC / DC charging circuit through each of the micro control units based on the AC voltage, the AC current, the frequency, the first voltage, the first current, the second voltage and the second current.

[0012] In one of the embodiments, the processor determines a first power output from an output end of the AC / DC conversion circuit and a total power input from the AC power source based on the AC voltage, the AC current, the frequency, the first voltage, and the first current;

[0013] The charging management unit obtains the second voltage and the second current, and adjusts the output power of the output end of the DC / DC charging circuit through each of the micro control units based on the first power and the total power.

[0014] In one embodiment, the DC / DC charging circuit includes:

[0015] a DC / DC switching circuit, wherein an input end of the DC / DC switching circuit is electrically connected to an output end of the AC / DC conversion circuit, and an output end of the DC / DC switching circuit is electrically connected to the battery pack to be charged;

[0016] a voltage / current feedback circuit, wherein an input end of the voltage / current feedback circuit is electrically connected to an output end of the DC / DC switching circuit, and an output end of the voltage / current feedback circuit is electrically connected to the micro control unit, and is used to collect the second voltage and the second current outputted from the output end of the DC / DC switching circuit; and

[0017] A pulse width modulation control circuit, wherein a first input end of the pulse width modulation control circuit is electrically connected to an output end of the voltage / current feedback circuit, a second input end of the pulse width modulation control circuit is electrically connected to the micro control unit, an output end of the pulse width modulation control circuit is electrically connected to the DC / DC switching circuit, and the micro control unit adjusts the output power of the output end of the DC / DC charging circuit (300) through the pulse width modulation control circuit.

[0018] In one embodiment, the DC / DC charging circuit further includes:

[0019] An overvoltage / overcurrent protection circuit, wherein the input end of the overvoltage / overcurrent protection circuit is electrically connected to the output end of the DC / DC switching circuit, and the output end of the overvoltage / overcurrent protection circuit is electrically connected to the third input end of the pulse width modulation control circuit and the micro control unit, respectively, for determining whether the second voltage and the second current exceed a preset threshold value to provide overvoltage / overcurrent protection.

[0020] In one embodiment, the DC / DC charging circuit further includes:

[0021] A battery protection circuit, wherein the input end of the battery protection circuit is electrically connected to the battery pack, and the output end of the battery protection circuit is electrically connected to the fourth input end of the pulse width modulation control circuit and the micro control unit respectively, for obtaining the power information of the battery pack and determining whether the battery pack is fully charged.

[0022] In one embodiment, the charging management unit is electrically connected to the processor and the plurality of micro control units respectively through a communication bus.

[0023] A multi-battery charging system comprises: a charging device as described in any one of the above embodiments, wherein the charging device is used to charge multiple battery packs to be charged at the same time.

[0024] In one of the embodiments, each of the battery packs is provided with a battery management system;

[0025] The multiple battery management systems are all electrically connected to the charging management unit, and the charging management unit obtains the battery parameters of the battery pack through the battery management system. The battery parameters include at least one of battery material information, discharge cut-off voltage, charge cut-off voltage, maximum constant current charging current, constant current and constant voltage turning point, and charging end current.

[0026] In one of the embodiments, each of the battery packs is provided with a battery management system;

[0027] The microcontroller unit is electrically connected to the battery management system, and the microcontroller unit corresponds to the battery management system one-to-one. The microcontroller unit obtains the battery parameters of the battery pack through the battery management system, and the battery parameters include at least one of battery material information, discharge cut-off voltage, charge cut-off voltage, maximum constant current charging current, constant current and constant voltage turning point, and charge end current.

[0028] A charging cabinet, comprising:

[0029] A charging device as described in any of the above embodiments, wherein the charging device is used to charge a plurality of battery packs to be charged at the same time;

[0030] A main controller, electrically connected to the charging management unit;

[0031] A backup battery is electrically connected to the main controller.

[0032] Compared with the prior art, the above-mentioned charging device, multi-battery charging system and charging cabinet convert the AC power input by the AC power source into DC power through the AC / DC conversion circuit, and cooperate with multiple DC / DC charging circuits to convert the DC power into a DC voltage that can charge the battery pack to be charged. At the same time, through the cooperation of the processor, multiple micro-control units and the charging management unit, the processor is used to obtain the AC voltage, AC current, frequency, first voltage and first current, and the multiple micro-control units are used to respectively obtain the second voltage and second current of each DC / DC charging circuit output terminal, so that the charging management unit adjusts the output power of the DC / DC charging circuit output terminal through each micro-control unit based on the above-mentioned parameters obtained, thereby improving the charging efficiency of the charging device, reducing heat loss, and improving the battery turnover rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A circuit diagram of a charging device provided in one embodiment of the present application;

[0034] Figure 2 A circuit diagram of an AC / DC conversion circuit provided in one embodiment of the present application;

[0035] Figure 3 A circuit block diagram of an AC / DC conversion circuit provided in an embodiment of the present application;

[0036] Figure 4 A circuit diagram of a DC / DC charging circuit provided in an embodiment of the present application;

[0037] Figure 5 A circuit block diagram of a DC / DC charging circuit provided in an embodiment of the present application;

[0038] Figure 6 A schematic diagram of the circuit structure of a charging device provided in one embodiment of the present application;

[0039] Figure 7 A circuit connection diagram of a multi-battery charging system provided in one embodiment of the present application;

[0040] Figure 8 A circuit connection diagram of a multi-battery charging system provided by another embodiment of the present application;

[0041] Fig. 9 A circuit diagram of a charging cabinet according to an embodiment of the present application.

[0042] 10 Charging device

[0043] 100 AC / DC conversion circuit

[0044] 101 AC Power Supply

[0045] 20+ battery charging systems

[0046] 200 processors

[0047] 30 Charging Cabinet

[0048] 31 Main controller.

[0049] 32 Spare battery

[0050] 300 DC / DC Charging Circuit

[0051] 301 Battery Pack

[0052] 302 Battery Management System

[0053] 310 DC / DC switching circuit

[0054] 320 Voltage / Current Feedback Circuit

[0055] 330 Pulse Width Modulation Control Circuit

[0056] 340 Overvoltage / Overcurrent Protection Circuit

[0057] 350 Battery Protection Circuit

[0058] 360 Input filter circuit

[0059] 370 Output filter circuit

[0060] 400 Microcontroller Unit

[0061] 401 Charging Module

[0062] 500 Charge Management Unit

[0063] 501 Communication Bus DETAILED DESCRIPTION

[0064] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0065] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0067] See also Figure 1 An embodiment of the present application provides a charging device 10, comprising: an AC / DC conversion circuit 100, a processor 200, a plurality of DC / DC charging circuits 300, a plurality of microcontroller units 400, and a charging management unit 500. The input end of the AC / DC conversion circuit 100 is used to electrically connect to an AC power source 101. The processor 200 is electrically connected to the AC / DC conversion circuit 100. The processor 200 is used to obtain the AC voltage, AC current, and frequency input by the AC power source 101, and to obtain the first voltage and first current output by the output end of the AC / DC conversion circuit 100. The input end of each of the DC / DC charging circuits 300 is electrically connected to the output end of the AC / DC conversion circuit 100. The output end of each of the DC / DC charging circuits 300 is used to electrically connect to a battery pack 301 to be charged.

[0068] Each of the micro control units 400 is electrically connected to one of the DC / DC charging circuits 300. The micro control unit 400 is used to obtain a second voltage and a second current at the output end of the DC / DC charging circuit 300. The charging management unit 500 is electrically connected to the processor 200 and multiple micro control units 400, respectively. The charging management unit 500 is used to obtain the AC voltage, the AC current, the frequency, the first voltage, the first current, the second voltage, and the second current, and adjust the output power of the output end of the DC / DC charging circuit 300 through each of the micro control units 400 based on the AC voltage, the AC current, the frequency, the first voltage, the first current, the second voltage, and the second current.

[0069] It can be understood that the specific circuit structure of the AC / DC conversion circuit 100 is not limited, as long as it has the function of converting the AC power input by the AC power source 101 into DC power. In one embodiment, the AC / DC conversion circuit 100 can be composed of an AC / DC converter. Specifically, the AC / DC converter can convert the AC power (220V) input by the AC power source 101 into a DC voltage higher than that required by the battery pack 301. In one embodiment, the AC / DC conversion circuit 100 can also adopt a traditional AC / DC conversion circuit, such as Figure 2 shown.

[0070] In one embodiment, the AC / DC conversion circuit 100 may also be constructed by a surge protection circuit, an input overvoltage / undervoltage protection circuit, an overcurrent protection circuit, an impact current suppression circuit, a rectification and filtering circuit, a power factor correction circuit, a high-frequency switching circuit, an isolation transformer, an output rectification and filtering circuit, etc. (e.g. Figure 3 In one embodiment, the above architecture can be used to control the input power of the AC / DC conversion circuit 100 within 3000W, thereby improving the safety of use.

[0071] In one embodiment, the processor 200 may be any one of an MCU, a DSP (Digital Signal Processing) and a CPU. The processor 200 may obtain the AC voltage, AC current, frequency input from the AC power source 101 to the AC / DC conversion circuit 100, and various power parameters such as the first voltage and the first current output from the output end of the AC / DC conversion circuit 100, so as to measure and control the real-time power of the AC / DC conversion circuit 100, thereby realizing the digitization of the AC / DC conversion circuit 100 and realizing intelligent control.

[0072] It can be understood that the specific circuit structure of the DC / DC charging circuit 300 is not limited, as long as it has the function of converting the DC power output by the AC / DC conversion circuit 100 to charge the battery pack 301. In one embodiment, the DC / DC charging circuit 300 can be composed of a DC / DC switching power supply. The specific circuit structure is as follows: Figure 4 In one embodiment, the DC / DC charging circuit 300 may also be composed of a DC / DC switching circuit 310, a voltage / current feedback circuit 320, and a pulse width modulation control circuit 330 (as shown in FIG. Figure 5 shown).

[0073] Specifically, the input end of the DC / DC switch circuit 310 is electrically connected to the output end of the AC / DC conversion circuit 100. The output end of the DC / DC switch circuit 310 is electrically connected to the battery pack 301 to be charged. The input end of the voltage / current feedback circuit 320 is electrically connected to the output end of the DC / DC switch circuit 310 and the micro control unit 400, respectively. The voltage / current feedback circuit 320 is used to collect the second voltage and the second current output by the output end of the DC / DC switch circuit 310.

[0074] The first input end of the pulse width modulation control circuit 330 is electrically connected to the output end of the voltage / current feedback circuit 320. The second input end of the pulse width modulation control circuit 330 is electrically connected to the micro control unit 400. The output end of the pulse width modulation control circuit 330 is electrically connected to the DC / DC switching circuit 310. The micro control unit 400 adjusts the output power of the output end of the DC / DC charging circuit 300 through the pulse width modulation control circuit 330.

[0075] In one embodiment, the DC / DC switch circuit 310 may be a MOS tube integration. In one embodiment, the voltage / current feedback circuit 320 may adopt a conventional feedback circuit, which is not specifically listed here. In one embodiment, the pulse width modulation control circuit 330 may adopt a PWM (Pulse width modulation) controller.

[0076] In one embodiment, the second voltage and the second current are collected through the voltage / current feedback circuit 320, and the second voltage and the second current are fed back to the micro control unit 400, and the micro control unit 400 sends the acquired second voltage and the second current to the charging management unit 500. Thus, the charging management unit 500 adjusts the output power of the output end of the DC / DC charging circuit 300 through the micro control unit 400 based on the AC voltage, the AC current, the frequency, the first voltage, the first current, the second voltage and the second current, thereby realizing charging of a larger number of the battery packs 301 and maximizing the charging efficiency.

[0077] In one embodiment, the micro control unit 400 adjusts the output power of the output end of the DC / DC charging circuit 300 through the pulse width modulation control circuit 330, which means: adjusting the setting parameters of the pulse width modulation control circuit 330 through the micro control unit 400, so that the pulse width modulation control circuit 330 can adjust the output power of the output end of the DC / DC charging circuit 300.

[0078] In one embodiment, the microcontroller unit 400 (MCU) may also be replaced by a DSP. In one embodiment, the number of the microcontroller units 400 is the same as that of the DC / DC charging circuits 300, and the microcontroller units 400 correspond to the DC / DC charging circuits 300 one by one.

[0079] In one embodiment, the micro control unit 400 can obtain the second voltage and the second current in real time, and determine whether the second voltage and the second current are the same as the set value sent by the charging management unit 500; if they are not the same, the micro control unit 400 can adjust the set parameters of the pulse width modulation control circuit 330, that is, adjust the output pulse of the pulse width modulation control circuit 330, so as to further adjust the voltage and current outputted by the output terminal of the DC / DC charging circuit 300 through the pulse width modulation control circuit 330, thereby achieving the purpose of adjusting the output power of the output terminal of the DC / DC charging circuit 300. In one embodiment, the micro control unit 400 can also be used to control the start-up of the DC / DC charging circuit 300.

[0080] In one embodiment, the micro control unit 400 can be integrated with the DC / DC charging circuit 300 to form a charging module 401 (eg, Figure 6 As shown). Thus, the battery pack 301 is charged through the charging module 401.

[0081] In one embodiment, the specific structure of the charging management unit 500 is not limited, as long as it has the function of adjusting the output power of the output end of the DC / DC charging circuit 300 through each of the micro control units 400 based on the AC voltage, the AC current, the frequency, the first voltage, the first current, the second voltage and the second current. In one embodiment, the charging management unit 500 can be a CPU (central processing unit). In one embodiment, the charging management unit 500 can also be a single chip microcomputer.

[0082] In one embodiment, the charging management unit 500 can be electrically connected to the processor 200 and the plurality of micro control units 400 through a communication bus 501. In one embodiment, the communication bus 501 can be a bus such as PM-BUS, RS485, CAN, RS232, etc. In one embodiment, the “ / ” in the AC / DC conversion circuit 100 and the DC / DC charging circuit 300 means: conversion or transformation, not “or”.

[0083] In one embodiment, after acquiring various power parameters such as the AC voltage, the AC current, the frequency, the first voltage, and the first current, the processor 200 may determine the first power output from the output end of the AC / DC conversion circuit 100 and the total power input from the AC power source 101 according to a preset algorithm based on the AC voltage, the AC current, the frequency, the first voltage, and the first current. The determined first power and the total power are transmitted to the charging management unit 500 via the communication bus 501. In one embodiment, the preset algorithm may be calculated using a traditional power calculation method.

[0084] After acquiring the first power and the total power, the charging management unit 500 may adjust the output power of the output end of the DC / DC charging circuit 300 based on the second voltage and the second current acquired by the micro control unit 400. Specifically, the charging management unit 500 may adjust the output power of the output end of the DC / DC charging circuit 300 corresponding to the micro control unit 400 through each micro control unit 400, thereby improving the charging efficiency of the charging device 10 and reducing heat loss.

[0085] In this embodiment, the AC / DC conversion circuit 100 converts the AC power inputted by the AC power source 101 into DC power, and cooperates with the plurality of DC / DC charging circuits 300 to convert the DC power into a DC voltage capable of charging the battery pack 301 to be charged. At the same time, the processor 200, the plurality of micro control units 400 and the charging management unit 500 cooperate to obtain the AC voltage, AC current, frequency, first voltage and first current by using the processor 200, and obtain the second voltage and second current of the output end of each DC / DC charging circuit 300 by using the plurality of micro control units 400, so that the charging management unit 500 adjusts the output power of the output end of the DC / DC charging circuit 300 through each micro control unit based on the acquired parameters, thereby improving the charging efficiency of the charging device 10 and reducing heat loss.

[0086] In one embodiment, the DC / DC charging circuit 300 further includes: an overvoltage / overcurrent protection circuit 340. The input end of the overvoltage / overcurrent protection circuit 340 is electrically connected to the output end of the DC / DC switching circuit 310. The output end of the overvoltage / overcurrent protection circuit 340 is electrically connected to the third input end of the pulse width modulation control circuit 330 and the micro control unit 400, respectively. The overvoltage / overcurrent protection circuit 340 is used to determine whether the second voltage and / or the second current exceeds a preset threshold value to provide overvoltage / overcurrent protection. In one embodiment, the overvoltage / overcurrent protection circuit 340 can adopt a conventional circuit with overvoltage / overcurrent protection function.

[0087] The overvoltage / overcurrent protection circuit 340 is used to determine whether the second voltage and / or the second current exceeds a preset threshold value. If the second voltage and / or the second current exceeds the preset threshold value, the microcontroller unit 400 controls the DC / DC switch circuit 310 to be turned off based on the pulse width modulation control circuit 330, thereby improving overvoltage / overcurrent protection and preventing damage to the battery pack 301.

[0088] In one embodiment, the DC / DC charging circuit 300 further includes: a battery protection circuit 350. The input end of the battery protection circuit 350 is electrically connected to the battery pack 301. The output end of the battery protection circuit 350 is electrically connected to the fourth input end of the pulse width modulation control circuit 330 and the micro control unit 400, respectively. The battery protection circuit 350 is used to obtain the power information of the battery pack 301 and determine whether the battery pack 301 is fully charged. In one embodiment, the battery protection circuit 350 can be a traditional circuit with a power monitoring function. The battery protection circuit 350 can monitor the power information of the battery pack 301 in real time and determine whether the battery pack 301 is fully charged. At the same time, the battery protection circuit 350 can also provide active protection for whether the battery pack 301 is connected in reverse or connected, thereby improving the safety of use.

[0089] In one embodiment, the DC / DC charging circuit 300 further includes: an input filter circuit 360 and an output filter circuit 370. The input filter circuit 360 is connected in series between the output end of the AC / DC conversion circuit and the input end of the DC / DC switching circuit 310. The input end of the output filter circuit 370 is electrically connected to the output end of the DC / DC switching circuit 310. The output end of the output filter circuit 370 is electrically connected to the input end of the voltage / current feedback circuit 320 and the battery pack 301, respectively. In one embodiment, both the input filter circuit 360 and the output filter circuit 370 can adopt conventional circuits with filtering functions, such as: EMI filters, etc. Through the cooperation of the input filter circuit 360 and the output filter circuit 370, the DC voltage output by the DC / DC charging circuit 300 can be made more stable.

[0090] See also Figure 7 In one embodiment of the present application, a multi-battery charging system 20 is provided, comprising: a charging device 10 as described in any of the above embodiments. The charging device 10 is used to simultaneously charge a plurality of battery packs 301 to be charged. In one embodiment, the battery pack 301 may be a lithium-ion battery.

[0091] In one embodiment, the capacities of the multiple battery packs 301 to be charged may be the same or different. When in use, the multiple battery packs 301 to be charged only need to be electrically connected to the charging device 10, and the charging device 10 can charge the multiple battery packs 301 to be charged at the same time, making charging simpler and more portable. During the charging process, the charging management unit 500 can adjust the output power of the output end of the DC / DC charging circuit 300 corresponding to the micro control unit 400 through each micro control unit 400, thereby improving the charging efficiency of the charging device 10 and reducing heat loss.

[0092] In one embodiment, a battery management system 302 is provided in each battery pack 301. Multiple battery management systems 302 are electrically connected to the charging management unit 500. The charging management unit 500 obtains battery parameters of the battery pack 301 through the battery management system 302. The battery parameters include at least one of battery material information, discharge cut-off voltage, charge cut-off voltage, maximum constant current charging current, constant current and constant voltage turning point, and charge end current.

[0093] In one embodiment, the charging management unit 500 and the battery management system 302 (i.e., BMS) may be electrically connected via the communication bus 501. The charging management unit 500 may obtain the battery parameters of the corresponding battery pack 301 through each of the battery management systems 302. This facilitates the charging management unit 500 to manage multiple battery packs 301, realizes full parameterization of charging, and can charge different types of battery packs 301 at the same time. The battery parameters may include battery material information, discharge cut-off voltage, charge cut-off voltage, maximum constant current charging current, constant current and constant voltage turning point, charge end current, current temperature of the battery core, battery cycle life, etc.

[0094] See also Figure 8 In one embodiment, a battery management system 302 is provided in each of the battery packs 301. The microcontroller unit 400 is electrically connected to the battery management system 302, and the microcontroller unit 400 corresponds to the battery management system 302 one by one. The microcontroller unit 400 obtains the battery parameters of the battery pack 301 through the battery management system 302. The battery parameters include at least one of battery material information, discharge cut-off voltage, charge cut-off voltage, maximum constant current charging current, constant current and constant voltage turning point, and charge end current.

[0095] In one embodiment, the microcontroller unit 400 can obtain the battery parameters of the battery pack 301 through the battery management system 302, and transmit the obtained battery parameters to the charging management unit 500 through the communication bus 501, so as to facilitate the charging management unit 500 to manage multiple battery packs 301 and realize full parameterization of charging, and then charge different types of battery packs 301 at the same time.

[0096] See also Fig. 9 In one embodiment of the present application, a charging cabinet 30 is provided, comprising: a charging device 10 as described in any of the above embodiments, a main controller 31, and a backup battery 32. The charging device 10 is used to charge a plurality of battery packs 301 to be charged at the same time. The main controller 31 is electrically connected to the charging management unit 500. The backup battery 32 is electrically connected to the main controller 31.

[0097] In one embodiment, the main controller 31 may be a CPU. The main controller 31 may be used to monitor the status of each device inside the charging cabinet 30 (such as the current temperature and voltage of each battery pack 301), execute logic, and other functions. In one embodiment, the charging cabinet 30 may enable the backup battery 32 when the main power is cut off to ensure that the network facilities such as the circuit board in the charging cabinet 30 can operate, and transmit relevant information to the background through the main controller 31. At this time, the charging device 10 will not continue to charge the battery pack 301.

[0098] In one embodiment, the charging cabinet 30 further includes a cabinet body, in which the plurality of battery packs 301 to be charged, the charging device 10, the main controller 31 and the backup battery 32 can be arranged. The charging device 10 and the main controller 31 are protected by the cabinet body to avoid damage.

[0099] In summary, the present application converts the AC power input by the AC power source 101 into DC power through the AC / DC conversion circuit 100, and cooperates with the multiple DC / DC charging circuits 300 to convert the DC power into a DC voltage capable of charging the battery pack 301 to be charged. At the same time, through the cooperation of the processor 200, the multiple micro control units 400 and the charging management unit 500, the processor 200 is used to obtain the AC voltage, AC current, frequency, first voltage and first current, and the multiple micro control units 400 are used to respectively obtain the second voltage and second current of the output end of each DC / DC charging circuit 300, so that the charging management unit 500 adjusts the output power of the output end of the DC / DC charging circuit 300 through each micro control unit based on the above parameters obtained, thereby improving the charging efficiency of the charging device 10, reducing heat loss and improving the circulation rate of the battery.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A charging device, characterized in that: include: An AC / DC conversion circuit (100), wherein an input end of the AC / DC conversion circuit (100) is used to electrically connect to an AC power source (101); A processor (200) is electrically connected to the AC / DC conversion circuit (100) and is used to obtain the AC voltage, AC current, and frequency input by the AC power source (101) and to obtain the first voltage and first current output by the output end of the AC / DC conversion circuit (100); A plurality of DC / DC charging circuits (300), wherein the input end of each DC / DC charging circuit (300) is electrically connected to the output end of the AC / DC conversion circuit (100), and the output end of each DC / DC charging circuit (300) is used to electrically connect to a battery pack (301) to be charged; A plurality of micro control units (400), each of the micro control units (400) being electrically connected to one of the DC / DC charging circuits (300), the micro control unit (400) being used to obtain a second voltage and a second current at an output end of the DC / DC charging circuit (300); as well as a charging management unit (500), electrically connected to the processor (200) and the plurality of micro control units (400), respectively, for acquiring the AC voltage, the AC current, the frequency, the first voltage, the first current, the second voltage and the second current, and adjusting the output power of the output end of the DC / DC charging circuit (300) through each of the micro control units (400) based on the AC voltage, the AC current, the frequency, the first voltage, the first current, the second voltage and the second current; The processor (200) determines the first power output from the output end of the AC / DC conversion circuit (100) and the total power input from the AC power source (101) based on the AC voltage, the AC current, the frequency, the first voltage, and the first current; the charging management unit (500) obtains the second voltage and the second current, and adjusts the output power of the output end of the DC / DC charging circuit (300) through each of the micro control units (400) based on the first power and the total power; The DC / DC charging circuit (300) comprises: a DC / DC switching circuit (310), the input end of the DC / DC switching circuit (310) being electrically connected to the output end of the AC / DC conversion circuit (100), and the output end of the DC / DC switching circuit (310) being electrically connected to the battery pack (301) to be charged; and a voltage / current feedback circuit (320), the input end of the voltage / current feedback circuit (320) being electrically connected to the output end of the DC / DC switching circuit (310), and the output end of the voltage / current feedback circuit (320) being electrically connected to the micro control unit (400), for collecting the DC / DC current. The second voltage and the second current are outputted at the output end of the DC switch circuit (310); and a pulse width modulation control circuit (330), wherein the first input end of the pulse width modulation control circuit (330) is electrically connected to the output end of the voltage / current feedback circuit (320), the second input end of the pulse width modulation control circuit (330) is electrically connected to the micro control unit (400), the output end of the pulse width modulation control circuit (330) is electrically connected to the DC / DC switch circuit (310), and the micro control unit (400) adjusts the output power of the output end of the DC / DC charging circuit (300) through the pulse width modulation control circuit (330).

2. The charging device according to claim 1, characterized in that: The DC / DC charging circuit (300) further includes: An overvoltage / overcurrent protection circuit (340), wherein an input end of the overvoltage / overcurrent protection circuit (340) is electrically connected to an output end of the DC / DC switch circuit (310), and an output end of the overvoltage / overcurrent protection circuit (340) is electrically connected to a third input end of the pulse width modulation control circuit (330) and the micro control unit (400), respectively, for determining whether the second voltage and the second current exceed a preset threshold value, so as to provide overvoltage / overcurrent protection.

3. The charging device according to claim 1, characterized in that: The DC / DC charging circuit (300) further includes: A battery protection circuit (350), wherein an input end of the battery protection circuit (350) is electrically connected to the battery pack (301), and an output end of the battery protection circuit (350) is electrically connected to a fourth input end of the pulse width modulation control circuit (330) and the micro control unit (400), respectively, for obtaining power information of the battery pack (301) and determining whether the battery pack (301) has been fully charged.

4. The charging device according to claim 1, characterized in that: The AC / DC conversion circuit (100) comprises: a surge protection circuit, an input overvoltage / undervoltage protection circuit, an overcurrent protection circuit, an impact current suppression circuit, a rectification and filtering circuit, a power factor correction circuit, a high-frequency switching circuit, an isolation transformer and an output rectification and filtering circuit.

5. The charging device according to claim 1, characterized in that: The DC / DC switch circuit (310) is an integrated MOS tube.

6. The charging device according to any one of claims 1 to 5, characterized in that: The charging management unit (500) is electrically connected to the processor (200) and the plurality of micro control units (400) respectively via a communication bus (501).

7. A multi-battery charging system, characterized in that: include: The charging device (10) according to any one of claims 1 to 5, wherein the charging device (10) is used to simultaneously charge a plurality of battery packs (301) to be charged.

8. The multi-battery charging system as claimed in claim 7, characterized in that: Each battery pack (301) is provided with a battery management system (302); The plurality of battery management systems (302) are electrically connected to the charging management unit (500), and the charging management unit (500) obtains battery parameters of the battery pack (301) through the battery management system (302), wherein the battery parameters include at least one of battery material information, discharge cut-off voltage, charge cut-off voltage, maximum constant current charging current, constant current and constant voltage turning point, and charge end current.

9. The multi-battery charging system as claimed in claim 7, characterized in that: Each battery pack (301) is provided with a battery management system (302); The microcontrol unit (400) is electrically connected to the battery management system (302), and the microcontrol unit (400) corresponds to the battery management system (302) one by one. The microcontrol unit (400) obtains battery parameters of the battery pack (301) through the battery management system (302), and the battery parameters include at least one of battery material information, discharge cut-off voltage, charge cut-off voltage, maximum constant current charging current, constant current and constant voltage turning point, and charge end current.

10. A charging cabinet, characterized in that: include: The charging device (10) according to any one of claims 1 to 5, wherein the charging device (10) is used to simultaneously charge a plurality of battery packs (301) to be charged; A main controller (31) electrically connected to the charging management unit (500); and A backup battery (32) is electrically connected to the main controller (31).

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