WO2018201299A1

WO2018201299A1 - Battery management system, charging apparatus, and charging method

Info

Publication number: WO2018201299A1
Application number: PCT/CN2017/082772
Authority: WO
Inventors: 张彩辉; 罗昊
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2017-05-02
Filing date: 2017-05-02
Publication date: 2018-11-08
Also published as: CN108702006A

Abstract

A battery management system (20), a charging apparatus (100), and a charging method, used for controlling the charging of multiple batteries (800). The battery management system (20) comprises an input terminal (21), a plurality of output terminals (23), a switch assembly (25), a distribution circuit (27), and a controller (29). The input terminal (21) is used for receiving a charging power input, the charging power comprising a first power and a second power. The switch assembly (25) comprises a first switch unit (252) and a second switch unit (254), the first switch unit (252) being connected to the input terminal (21) and each output terminal (23). The distribution circuit (27) is connected to the input terminal (21) and is connected to each output terminal (23) by means of the second switch unit (254), the distribution circuit (27) being used for distributing the second power to an output terminal (23). The controller (29) is used for controlling the distribution circuit (27) and the second switch unit (254) to charge a second battery (840) at the second power and, when the second battery (840) is charging, controlling the first switch unit (252) to charge a first battery (820) at a first power.

Description

Battery management system, charging device and charging method

Technical field

The present invention relates to the field of consumer electronics, and in particular, to a battery management system, a charging device, and a charging method.

Background technique

In the related art, an adapter charging a plurality of batteries has a poor effect, and has the disadvantages of long charging time, large safety hazard, and high cost. For example, an adapter is used to charge a plurality of batteries in turn, and the charging method has a longer charging time.

Summary of the invention

Embodiments of the present invention provide a battery management system, a charging device, and a charging method.

An embodiment of the present invention provides a battery management system for controlling charging of a plurality of batteries, the plurality of batteries including a first battery and a second battery, and the battery management system includes:

An input, the input is configured to receive an input of charging power, where the charging power includes a first power and a second power;

a plurality of output ends, each of the output ends for correspondingly connecting one of the batteries;

a switch assembly, the switch assembly including a first switch unit and a second switch unit, the first switch unit connecting the input end and each of the output ends;

a distribution circuit, the distribution circuit is connected to the input terminal and connected to each of the output terminals by the second switching unit, the distribution circuit is configured to allocate the second power to one of the output terminals;

a controller for:

Controlling the distribution circuit and the second switching unit to cause the second battery to be charged with the second power; and

The first switching unit is controlled to charge the first battery at the first power while the second battery is charging.

An embodiment of the present invention provides a charging device for controlling charging of a plurality of batteries, the plurality of batteries including a first battery and a second battery, and the charging device includes:

Adapter; and

A battery management system, the battery management system comprising:

a controller for:

An embodiment of the present invention provides a charging method for charging a plurality of batteries, the plurality of batteries including a first battery and a second battery, and the charging method includes the following:

Allocating a first power and one or more second powers from the charging power output by the adapter;

Charging one of the second batteries with the second power, wherein the second power is less than or equal to a rated power of the second battery;

Charging one or more of the first batteries with the first power.

The battery management system, the charging device, and the charging method of the embodiments of the present invention increase the charging power to obtain the first power and the second power, and simultaneously charge the first battery and the second battery with the first power and the second power, thereby improving The efficiency of charging.

The additional aspects and advantages of the embodiments of the present invention will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic view showing the connection of a charging device and a battery according to an embodiment of the present invention;

2 is a schematic flow chart of a charging method according to an embodiment of the present invention;

3 is another schematic flow chart of a charging method according to an embodiment of the present invention;

4 is a schematic flow chart of still another charging method according to an embodiment of the present invention.

The main component symbol drawing description:

Charging device 100, adapter 10, battery management system 20, input terminal 21, output terminal 23, switch assembly 25, first switch unit 252, second switch unit 254, distribution circuit 27, controller 29, battery 800, first battery 820, a second battery 840.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include one or more of the described features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; may be mechanically connected, or may be electrically connected or may communicate with each other; may be directly connected or indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention may be repeated with reference to the numerals and/or reference numerals in the various examples, which are for the purpose of simplicity and clarity, and do not indicate the relationship between the various embodiments and/or arrangements discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the use of other processes and/or the use of other materials.

Referring to FIG. 1, a battery management system 20 of an embodiment of the present invention can be used to control charging of a plurality of batteries 800. The plurality of batteries 800 includes a first battery 820 and a second battery 840. The battery management system 20 includes an input 21, a plurality of outputs 23, a switch assembly 25, a distribution circuit 27, and a controller 29. The input terminal 21 is configured to receive an input of charging power, and the charging power includes a first power and a second power. Each output terminal 23 is used to connect a battery 800 correspondingly. The switch assembly 25 includes a first switch unit 252 and a second switch unit 254 that connects the input terminal 21 and each of the output terminals 23. The distribution circuit 27 is connected to the input terminal 21 and is connected to each output terminal 23 via a second switching unit 254 for distributing the second power to an output terminal 23. The controller 29 is configured to control the distribution circuit 27 and the second switching unit 254 to control the first switching unit 252 to cause the first battery 820 to be first when the second battery 840 is charged at the second power and when the second battery 840 is charged. Power charging.

The battery management system 20 of the embodiment of the present invention may be applied to the charging device 100 of the embodiment of the present invention, or The charging device 100 of the embodiment of the present invention includes the battery management system 20 of the embodiment of the present invention. Further, the charging device 100 of the embodiment of the present invention further includes an adapter 10. The adapter 10 is used to connect to the battery management system 20.

Referring to FIG. 2, a charging method according to an embodiment of the present invention can be used to charge a plurality of batteries 800. The plurality of batteries 800 includes a first battery 820 and a second battery 840. Charging methods include:

Step S1: allocating a first power and one or more second powers from the charging power output by the adapter 10;

Step S2: charging a second battery 840 with a second power, wherein the second power is less than or equal to the rated power of the second battery 840; and

Step S3: charging one or more first batteries 820 with the first power.

That is, the charging method of the embodiment of the present invention can be implemented by the battery management system 20 of the embodiment of the present invention, wherein the steps S1, S2, and S3 can be implemented by the controller 29.

The battery management system 20, the charging device 100, and the charging method of the embodiments of the present invention obtain the first power and the second power by distributing the charging power, and simultaneously give the first battery 820 and the second battery 840 using the first power and the second power. Charging to increase the efficiency of charging.

In the embodiment of the present invention, step S2 is performed before step S3. It can be understood that in other embodiments, step S3 is performed before step S2, or step S2 and step S3 are simultaneously performed. Preferably, step S2 and step S3 are performed simultaneously to shorten the charging time of the plurality of batteries 800.

In the embodiment of the present invention, the battery 800 that is charged via the distribution circuit 27 and the second switching unit 254 functions as the second battery 840, and the battery 800 that is charged via the first switching unit 252 serves as the first battery 820.

In some embodiments, the battery 800 having the highest voltage among the plurality of batteries 800 can be selected as the second battery 840, so that the second battery 840 can be fully charged in a shorter time to provide user use and satisfy the user. Demand for use.

The distribution circuit 27 is used to distribute a portion of the power from the charging line as a charging branch. For example, in one of the embodiments, the distribution circuit 27 can include a direct current (DC-DC) buck-boost circuit.

In some embodiments, the input 21 of the battery management system 20 is configured to receive an input of the charging power of the direct current. Therefore, it is necessary to convert the alternating current (such as commercial power) into direct current by the adapter 10, and then supply it to the battery management system 20. In one embodiment, the adapter 10 is coupled to the input 21 of the battery management system 20 and provides charging power to the battery management system 20 via the input 21.

In some embodiments, the adapter 10 is connected to the controller 29 through a voltage stabilizing unit, and the DC power of the adapter 10 is regulated by the voltage stabilizing unit, thereby preventing the normal operation of the controller 29 from being unsatisfactory when the DC power of the adapter 10 is unstable. influences. In one embodiment, the voltage stabilizing unit can be a low dropout linear regulator.

In some embodiments, charging device 100 is a charging base station for a charger, a charging housekeeper, or an unmanned aerial vehicle. As such, the charging base station of the charger, charging housekeeper or unmanned aerial vehicle includes the battery management system 20 of the embodiment of the present invention, The battery 800 can be charged using the charging method of the embodiment of the present invention.

In one embodiment, the first battery 820 is plural. When the second battery 840 is charged, the controller 29 is configured to determine the first battery 820 having a smaller voltage among the plurality of first batteries 820, and control the first switch. Unit 252 first charges the first battery 820 having a lower voltage.

Referring to FIG. 3, in an embodiment, step S3 includes:

Step S31: determining a first battery 820 having a smaller voltage among the plurality of first batteries 820;

Step S32: First charge the first battery 820 having a small voltage.

That is to say, steps S31 and S32 can be implemented by the controller 29.

In this way, it is possible to avoid the danger that the first battery 820 having a higher voltage among the plurality of first batteries 820 charges the first battery 820 having a lower voltage when the plurality of first batteries 820 are simultaneously charged.

It can be understood that when the plurality of first batteries 820 are charged, the voltages of the plurality of first batteries 820 may be different in height, such that the first battery 820 having a higher voltage and the first battery 820 having a lower voltage and a lower voltage are simultaneously present. Charging, the first battery 820 that is charged at a lower voltage is extremely prone to dangerous situations such as damage or explosion. Therefore, before the plurality of first batteries 820 are simultaneously charged, the controller 29 controls the first switching unit 252 to first charge the first battery 820 having a lower voltage. In the example of the present invention, the number of first batteries 820 is two. When the number of the first batteries 820 is three or more, the first battery 820 having the lowest voltage is obtained by the pairwise comparison, and the controller 29 controls the first switching unit 252 to first charge the first battery 820 having the lowest voltage. When the number of the first batteries 820 having the smallest voltage obtained is two or more, the controller 29 can control the first switching unit 252 to simultaneously charge all of the first batteries 820 having the lowest voltage.

It is noted that in certain embodiments, the controller 29 charges the battery 800 by controlling the closing of the switch assembly 25, and stops charging the battery 800 by controlling the opening of the switch assembly 25.

In one embodiment, during charging of the first battery 820 having a lower voltage, when the voltage of the first battery 820 having a smaller voltage rises to be the same as the voltage of the other first battery 820, the controller 29 passes the first The switching unit 252 controls the two first batteries 820 having the same voltage to be simultaneously charged.

Referring to FIG. 4, in an embodiment, step S3 includes:

Step S33: When the voltage of the first battery 820 having a small voltage rises to be the same as the voltage of the other first battery 820, the two first batteries 820 having the same voltage are simultaneously charged.

As such, the simultaneously charged first battery 820 can be gradually increased until all of the first batteries 820 are simultaneously charged.

Specifically, in one example, taking four first batteries 820 as an example, the controller 29 determines that the voltages of the four first batteries 820 are 4.1V, 4.3V, 4.5V, and 4.7V, respectively. The controller 29 controls the first battery 820 of 4.1 V to be charged first by the first switching unit 252. When the voltage of the first battery 820 of 4.1 V rises to 4.3 V, the controller 29 controls the two 4.3 by the first switching unit 252. The first battery 820 of V is charged; in the first battery 820 of two 4.3V When the voltage rises to 4.5V, the controller 29 controls the three 4.5V first batteries 820 to be charged by the first switching unit 252; when the voltage of the three 4.5V first batteries rises to 4.7V, the controller 29 passes The first switching unit 252 controls the four 4.7V first batteries 820 to simultaneously charge. In this example, this charging method is called the first charging method.

In one embodiment, the voltage of the first battery 820 having a lower voltage rises to be the same as the voltage of the first battery 820 having the highest voltage.

In this manner, the voltage of the first battery 820 having a small voltage can be raised to the voltage of the first battery 820 having the largest voltage.

Specifically, in another example, taking four first batteries 820 as an example, the controller 29 determines that the voltages of the four first batteries 820 are 4.1V, 4.3V, 4.5V, and 4.7V, respectively. The controller 29 controls the voltages of the first battery 820 of 4.1 V, 4.3 V, and 4.5 V to rise to 4.7 V through the first switching unit 252, respectively, and then controls the charging of the four 4.7 V first batteries 820 simultaneously. More specifically, the controller 29 controls the first battery 820 of 4.1 V to be charged first by the first switching unit 252, and when the voltage of the first battery 820 of 4.1 V rises to 4.7 V, the controller 29 passes the first switching unit 252. The first battery 820 that controls two 4.7Vs stops charging and controls the first battery 820 of 4.3V for charging; when the voltage of the first battery 820 of 4.3V rises to 4.7V, the controller 29 controls through the first switching unit 252. The three 4.7V first batteries 820 stop charging and control the 4.5V first battery 820 for charging; when the 4.5V first battery 820 voltage rises to 4.7V, the controller 29 controls the fourth through the first switching unit 252. A 4.7V first battery 820 is simultaneously charged. In this example, this type of charging is referred to as the second charging mode.

In some embodiments, the first charging mode and the second charging mode described above may be combined to cause the plurality of first batteries 820 to be simultaneously charged.

Specifically, taking four first batteries 820 as an example, the voltages of the four first batteries 820 are 4.1V, 4.3V, 4.5V, and 4.7V, respectively. The controller 29 controls the first battery 820 of 4.1 V to be charged first by the first switching unit 252. When the voltage of the first battery 820 of 4.1 V rises to 4.3 V, the controller 29 controls the two 4.3 by the first switching unit 252. The first battery 820 of V is charged; when the voltage of the two 4.3V first batteries 820 rises to 4.7V, the controller 29 controls the three 4.7V first batteries 820 to stop charging and controlling through the first switching unit 252. The first battery 820 of 4.5 V is charged; when the voltage of the first battery of 4.5 V rises to 4.7 V, the controller 29 controls the four 4.7 V first batteries 820 to be simultaneously charged by the first switching unit 252.

In one embodiment, the first power is less than or equal to the total rated power of the first battery 820 being charged; and/or the second power is less than or equal to the rated power of the single second battery 840.

In this way, it is possible to ensure the safety of the battery 800 when it is charged.

It can be understood that when the battery 800 is charged, the power of charging is greater than the rated power of the battery 800 may cause damage or explosion of the battery 800, so the first power for charging the first battery 820 is less than or equal to the first battery being charged. The total rated power of 820; the second power to charge the second battery 840 is less than or equal to a single second power The rated power of the pool 840 ensures that the battery 800 is safely charged.

In an embodiment, the charging method further includes:

Step S4: adjusting the size of the first power according to the number of the first battery 820 and the state of charge;

Step S5: Adjust the magnitude of the second power according to the state of charge of the second battery 840.

In this way, the power charged by the battery 800 can be adjusted according to actual needs.

It can be understood that, in this embodiment, the first power is used to charge one or more first batteries 820, and the second power is used to charge a single second battery 840. Therefore, the size of the first power may be according to the first The number of one battery 820 and the state of charge are determined, and the magnitude of the second power may be determined according to the state of charge of the second battery 840.

It should be noted that the second power that charges the battery 800 via the distribution circuit 27 and the second switching unit 254 has priority over the first power, that is, the controller 29 can control the charging power to be first distributed to form the second power to the second battery. The 840 is charged and then distributed from the remaining charging power to form a first power. In some embodiments, when the power required for charging by the first battery 820 is greater than or equal to the remaining charging power, the remaining charging power charges the first battery 820 as the first power; the power required by the first battery 820 is less than At the remaining charging power, the remaining charging power is distributed to the first battery 820 by the first power equal to the charging power required by the first battery 820.

In one embodiment, the charging mode of the battery 800 includes a constant current charging mode and a constant voltage charging mode.

As such, the battery 800 can be quickly charged and the corresponding state of charge of the battery 800 can be obtained according to the charging mode of the battery 800.

It can be understood that when the charging mode of the battery 800 is the constant current charging mode, the charging speed is faster, the required charging power is larger, and the power of the battery 800 can be quickly added to a near full value; the charging mode of the battery 800 is constant. In the charging mode, the charging speed is slow, and the required charging power is small, and the battery 800 power close to the full value can be added to the full value. The state of charge of the battery 800 can be divided into a constant current state and a constant voltage state according to the charging mode of the battery 800, that is, when the charging mode of the battery 800 is a constant current charging state, the state of charge of the battery 800 is a constant current state; When the charging mode of 800 is the constant voltage charging state, the state of charge of the battery 800 is a constant voltage state. In this way, the magnitudes of the first power and the second power can be adjusted according to the power of charging required for the charging mode corresponding to the state of charge of the battery 800.

In one embodiment, the first battery 820 and the second battery 840 have the same or different structure.

In this way, the first battery 820 and the second battery 840 having the same or different structures can be simultaneously charged, so that the battery management system 20 has a wide application range.

Specifically, the battery management system 20, the charging device 100, and the charging method of the embodiments of the present invention may simultaneously charge the battery 800 having the same or different structure. The structure of the battery 800 may refer to the type of the battery 800, such as a lithium iron phosphate battery. Lithium manganate battery; the structure of the battery 800 may also refer to the specifications of the battery 800 (such as rated power or internal structure, etc.), for example, the battery 800 may be a battery 800 produced by a different manufacturer or a battery 800 of different specifications produced by the same manufacturer. Wait.

In one embodiment, the charging power is greater than the rated power of a single battery 800.

As such, when the plurality of batteries 800 are charged by the charging power, the second battery 840 can be charged at the rated power, ensuring that the charging power can simultaneously charge at least two of the batteries 800.

Specifically, the charging power distribution forms a first power and one or more second powers, and the second power charges a second battery 840. Since the charging power is greater than the rated power of the single battery 800, the charging power can be allocated and The power of the equal power of the two batteries 840 is taken as the second power, so that the second battery 840 is charged at a faster speed. The remaining power except the second power is distributed according to the demand to form the first power, and the first battery 820 is charged by the first power, thereby achieving simultaneous charging of the first battery 820 and the second battery 840, thereby accelerating the plurality of times. The efficiency of battery 800 charging.

In one embodiment, the number of distribution circuits 27 is determined based on the charging power, or the number of second power allocations is determined based on the charging power.

As such, the number of distribution circuits 27 can be determined based on the charging power.

Specifically, the distribution circuit 27 is for distributing the charging power to form the second power, one distribution circuit 27 can be distributed to form a second power, and a second power can be supplied to a second battery 840 for charging. In order to control the cost of the battery management system 20 or the charging device 100, it is necessary to consider the number of the distribution circuits 27. The number of required distribution circuits 27 can be determined by the magnitude of the charging power, so that the manufacturing cost can be reduced while improving the charging power distribution capability of the battery management system or the charging device 100.

In one embodiment, the number of distribution circuits 27 or the number of second power allocations is calculated by the following formula:

Where m is the number of distribution circuits 27 or the number of second power distributions, P _c is the charging power, and P _b is the rated power of the individual battery 800.

As such, the number of distribution circuits 27 required by the battery management system 20 or the charging device 100 can be obtained by a formula.

specifically,

Indicates rounding up. For example, when X=(0,1],

When X=(1,2),

And so on.

In one embodiment, the charging power is 200W, the rated power of the single battery 800 is 150W, and the number of the distribution circuits 27 is

One.

In another embodiment, the charging power is 350W, the rated power of the single battery 800 is 150W, and the number of the distribution circuits 27 is

One.

In one embodiment, the switch assembly 25 includes at least one of an electronic switch and a mechanical switch.

As such, the switch assembly 25 has a wider selection of switches, reducing the cost of the charging device 100.

Specifically, the switch assembly 25 includes at least one of an electronic switch and a mechanical switch, which refers to one of the following: the switch assembly 25 can include an electronic switch; the switch assembly 25 can include a mechanical switch; and the switch assembly 25 can include an electronic switch and Mechanical switch. The electronic switch can include electronic components such as a triode and a relay. This is not specifically limited.

For example, in the example shown in FIG. 1, the three first switching units 252 and the three second switching units 254 are both electrically The sub-switches, or both are mechanical switches, or one or several of the switch units are electronic components, one or several of which are mechanical switches. Preferably, all of the switching units are electronic or mechanical switches to facilitate simplification of circuit design and control.

In one embodiment, when the temperature of the battery 800 is less than the preset temperature, the controller 29 is configured to control the distribution circuit 27 and the second switching unit 254 to cause one of the output terminals 23 to output a preset safety current to a temperature lower than a preset temperature. The battery 800, or the second power, is supplied to the battery 800 having a temperature lower than a preset temperature in a predetermined safe current.

In this way, when the temperature of the battery 800 is less than the preset temperature, the battery 800 having a temperature lower than the preset temperature is charged with a preset safety current, thereby ensuring the service life of the battery 800.

In some embodiments, the temperature of the battery 800 is less than the preset temperature and can be considered to be in a low temperature state.

It can be understood that when the temperature of the battery 800 is less than the preset temperature, if the charging current of the battery 800 is too large, the battery 800 is easily damaged, so the battery 800 needs to be charged with a preset safety current, thereby ensuring the safety of the charging process. Sex. In order to ensure that the current of the charging of the battery 800 is a preset safe current, the current of the charging of the battery 800 can be controlled by the distribution circuit 27, so when the temperature of the battery 800 is less than the preset temperature, the controller 29 controls the distribution circuit 27 to be in the The battery 800 in a low temperature state is charged to be able to accurately control the magnitude of the preset safe current.

In one embodiment, the preset temperature is 15 degrees Celsius. As such, when the temperature of the battery 800 is below 15 degrees Celsius, the battery 800 needs to be charged with a preset safe current.

In some embodiments, when the temperature of the battery 800 is below 0 degrees Celsius, since the temperature of the battery 800 is too low, the controller 29 can control the battery 800 to stop charging to prevent damage to the battery 800.

In one embodiment, the preset safe current is 0.7 times the rated current of the battery 800. In this way, the battery 800 in a low temperature state can be charged relatively quickly while preventing damage to the battery 800.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for performing the steps of a particular logical function or process. And the scope of the preferred embodiments of the invention includes additional implementations, which may be performed in a substantially simultaneous manner or in the reverse order, depending on the functions involved, in the order shown or discussed, which should It will be understood by those skilled in the art to which the embodiments of the present invention pertain.

The logic and/or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for performing logical functions, and may be embodied in any computer readable medium, For execution of a system, apparatus, or device (such as a computer-based system, a system including a processor, or other executable system from instructions) A system, device, or device that fetches instructions and executes instructions for use, or in conjunction with such instructions to execute a system, device, or device. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport a program for use in an instruction execution system, apparatus, or device, or in conjunction with the instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections (electronic devices) having one or more wires, portable computer disk cartridges (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM). In addition, the computer readable medium may even be a paper or other suitable medium on which the program can be printed, as it may be optically scanned, for example by paper or other medium, followed by editing, interpretation or, if appropriate, other suitable The method is processed to obtain the program electronically and then stored in computer memory.

It should be understood that portions of the invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, multiple steps or methods may be performed by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if executed in hardware, as in another embodiment, it can be performed by any one of the following techniques or combinations thereof known in the art: having logic gates for performing logic functions on data signals Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

Those skilled in the art can understand that all or part of the steps carried in carrying out the above implementation method can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the program is executed. Including one or a combination of the steps of the method embodiments.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be executed in the form of hardware or in the form of software functional modules. The integrated modules, if executed in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.

The above mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like. Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A battery management system for controlling charging of a plurality of batteries, wherein the plurality of batteries comprises a first battery and a second battery, and the battery management system comprises:

An input, the input is configured to receive an input of charging power, where the charging power includes a first power and a second power;

a plurality of output ends, each of the output ends for correspondingly connecting one of the batteries;

a switch assembly, the switch assembly including a first switch unit and a second switch unit, the first switch unit connecting the input end and each of the output ends;

a distribution circuit, the distribution circuit is connected to the input terminal and connected to each of the output terminals by the second switching unit, the distribution circuit is configured to allocate the second power to one of the output terminals;

a controller for:

Controlling the distribution circuit and the second switching unit to cause the second battery to be charged with the second power; and

The first switching unit is controlled to charge the first battery at the first power while the second battery is charging.
The battery management system according to claim 1, wherein the first battery is plural, and when the second battery is charged, the controller is configured to determine a voltage comparison among the plurality of the first batteries. The first battery is small, and the first switching unit is controlled to charge the first battery with a small voltage.
A battery management system according to claim 2, wherein during charging of said first battery having a small voltage, when a voltage of said first battery having a small voltage rises to another said first When the voltages of the batteries are the same, the controller controls the two first batteries having the same voltage to be simultaneously charged by the first switching unit.
The battery management system of claim 2 wherein said first power is less than or equal to a total rated power of said first battery being charged; and/or said second power is less than or equal to a single said The rated power of the second battery.
The battery management system according to claim 1, wherein said first battery and said second battery have the same or different structure.
The battery management system of claim 1 wherein said charging power is greater than a rated power of said single battery.
The battery management system of claim 1 wherein said number of distribution circuits is determined based on said charging power.
The battery management system according to claim 7, wherein the number of said distribution circuits is calculated by the following formula:
Where m is the number of the distribution circuits, P c is the charging power, and P b is the rated power of a single of the batteries.
The battery management system according to claim 1, wherein said battery charging mode comprises a constant current charging mode and a constant voltage charging mode.
The battery management system of claim 1 wherein said switch assembly comprises at least one of an electronic switch and a mechanical switch.
The battery management system according to claim 1, wherein said controller is configured to control said distribution circuit and said second switching unit to cause one of said states when said battery temperature is less than a preset temperature The output terminal outputs a preset safety current to the battery whose temperature is less than the preset temperature.
The battery management system of claim 11 wherein said predetermined temperature is 15 degrees Celsius.
The battery management system according to claim 11, wherein said preset safety current is 0.7 times the rated current of said battery.
A charging device for controlling charging of a plurality of batteries, wherein the plurality of batteries comprises a first battery and a second battery, and the charging device comprises:

Adapter; and

A battery management system, the battery management system comprising:

An input, the input is configured to receive an input of charging power, where the charging power includes a first power and a second power;

a plurality of output ends, each of the output ends for correspondingly connecting one of the batteries;

a switch assembly, the switch assembly including a first switch unit and a second switch unit, the first switch unit connecting the input end and each of the output ends;

a distribution circuit, the distribution circuit is connected to the input terminal and connected to each of the output terminals by the second switching unit, the distribution circuit is configured to allocate the second power to one of the output terminals;

a controller for:

Controlling the distribution circuit and the second switching unit to cause the second battery to be charged with the second power; and

The first switching unit is controlled to charge the first battery at the first power while the second battery is charging.
The charging device according to claim 14, wherein said first battery is plural, and said controller is configured to determine that a voltage of said plurality of said first batteries is small when said second battery is charged The first battery, and controlling the first switching unit to first charge the first battery with a small voltage.
A charging apparatus according to claim 15, wherein during charging of said first battery having a small voltage, when a voltage of said first battery having a small voltage rises to another said first battery When the voltages are the same, the controller is configured to simultaneously charge the two first batteries having the same voltage through the first switching unit.
A charging device according to claim 15, wherein said first power is less than or equal to charging The total rated power of the first battery; and/or the second power is less than or equal to the rated power of a single of the second battery.
The charging device according to claim 14, wherein said first battery and said second battery have the same or different structure.
The charging device of claim 14 wherein said adapter is operative to convert alternating current to direct current to provide said charging power to said input.
The charging device according to claim 14, wherein said charging power is greater than a rated power of said single battery.
A charging device according to claim 14, wherein the number of said distribution circuits is determined in accordance with said charging power.
A charging apparatus according to claim 21, wherein said number of distribution circuits is calculated by the following formula:
Where m is the number of the distribution circuits, P c is the charging power, and P b is the rated power of a single of the batteries.
A charging apparatus according to claim 14, wherein said battery is charged in a constant current charging mode and a constant voltage charging mode.
The charging device of claim 14 wherein said switch assembly comprises at least one of an electronic switch and a mechanical switch.
The charging device according to claim 14, wherein said controller is configured to control said distribution circuit and said second switching unit to cause one of said outputs when said battery temperature is less than a preset temperature The terminal outputs a preset safety current to the battery whose temperature is less than the preset temperature.
The charging device according to claim 25, wherein said preset temperature is 15 degrees Celsius.
The charging device according to claim 25, wherein said preset safety current is 0.7 times the rated current of said battery.
The charging device according to claim 14, wherein said charging device is a charging base station of a charger, a charging housekeeper or an unmanned aerial vehicle.
A charging method for charging a plurality of batteries, wherein the plurality of batteries comprises a first battery and a second battery, and the charging method comprises:

Allocating a first power and one or more second powers from the charging power output by the adapter;

Charging one of the second batteries with the second power, wherein the second power is less than or equal to a rated power of the second battery;

Charging one or more of the first batteries with the first power.
The charging method according to claim 29, wherein said adopting said first power pair one or more Charging the first battery includes:

Determining the first battery having a smaller voltage among the plurality of first batteries;

The first battery having a small voltage is charged first.
The charging method according to claim 30, wherein said charging said one or more of said first batteries with said first power comprises:

When the voltage of the first battery having a small voltage rises to be the same as the voltage of the other of the first batteries, the two first batteries having the same voltage are simultaneously charged.
The charging method according to claim 30, wherein said first power is less than or equal to a total rated power of said first battery being charged; and/or said second power is less than or equal to said single said first The rated power of the two batteries.
The charging method according to claim 31, wherein said first battery and said second battery have the same or different structure.
The charging method according to claim 31, wherein said adapter is for converting alternating current to direct current to provide said charging power.
The charging method according to claim 31, wherein said charging power is greater than a rated power of said single battery.
The charging method according to claim 29, wherein the amount of the second power allocation is determined according to the charging power.
The charging method according to claim 36, wherein said second power allocation amount is calculated by the following formula:
Where m is the number of the second power distribution, P c is the charging power, and P b is the rated power of a single of the batteries.
The charging method according to claim 29, wherein the charging mode of the battery comprises a constant current charging mode and a constant voltage charging mode.
The charging method according to claim 29, wherein the charging method further comprises:

Adjusting a size of the first power according to the number of the first battery and the state of charge;

Adjusting the magnitude of the second power according to a state of charge of the second battery.
The charging method according to claim 29, wherein when the temperature of the battery is less than a preset temperature, the second power is supplied to the temperature at a temperature lower than the preset temperature by a preset safety current battery.
The charging method according to claim 40, wherein said preset temperature is 15 degrees Celsius.
The charging method according to claim 40, wherein said preset safety current is 0.7 times the rated current of said battery.