CN114448012A - Charging and discharging communication control system and method and battery pack - Google Patents

Charging and discharging communication control system and method and battery pack Download PDF

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Publication number
CN114448012A
CN114448012A CN202110599056.3A CN202110599056A CN114448012A CN 114448012 A CN114448012 A CN 114448012A CN 202110599056 A CN202110599056 A CN 202110599056A CN 114448012 A CN114448012 A CN 114448012A
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CN
China
Prior art keywords
battery pack
control unit
type
charging
discharging
Prior art date
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Pending
Application number
CN202110599056.3A
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Chinese (zh)
Inventor
崔阳
陶雨
刘传君
罗明
朱彦亮
李保安
庄宪
李志远
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Globe Jiangsu Co Ltd
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Globe Jiangsu Co Ltd
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Filing date
Publication date
Priority claimed from CN202011228201.9A external-priority patent/CN112259866A/en
Application filed by Globe Jiangsu Co Ltd filed Critical Globe Jiangsu Co Ltd
Priority to CA3220576A priority Critical patent/CA3220576A1/en
Priority to PCT/CN2022/087124 priority patent/WO2022247517A1/en
Priority to EP22810250.5A priority patent/EP4350866A1/en
Priority to AU2022282142A priority patent/AU2022282142A1/en
Publication of CN114448012A publication Critical patent/CN114448012A/en
Priority to US18/519,071 priority patent/US20240088506A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285—Testing apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/446—Initial charging measures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/448—End of discharge regulating measures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a communication control system and a communication control method for charging and discharging and a battery pack, which support a USB PD rapid charging protocol, are provided with three communication lines between a power supply terminal and a first control unit, between each Type-C interface and a second control unit and between the first control unit and the second control unit, and dynamically adjust input/output power according to real-time data interaction execution charging/discharging protection logic in the charging/discharging process of the battery pack, thereby not only rapidly charging/discharging, but also effectively protecting the safety of the battery pack and prolonging the service life of the battery pack.

Description

Charging and discharging communication control system and method and battery pack
Technical Field
The invention relates to the technical field of battery packs, in particular to a charging and discharging communication control system and method and a battery pack.
Background
In recent years, with the development of battery material technology, the application range of lithium batteries has been greatly increased. Electric tools and garden tool products on the market are used in a large amount at present, and the application mode is to supply power to corresponding tools through power supply terminals.
The garden tool is a maintenance device for the greening landscape of human beings, takes the maintenance of lawns, hedgerows, protection of flowers and plants and trees as operation objects, and replaces most of mechanized tools represented by manual labor.
The garden instrument provides the power through the battery package, and the charge-discharge interface of present battery package generally adopts mechanical terminal, and input/output's voltage is single, leads to relatively poor with the matching nature of access device, and application scope is little, inconvenient user's use.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a communication control system and method for charging and discharging, and a battery pack, which are used to solve the problems that a battery pack in the prior art uses a mechanical terminal as a charging and discharging interface, and is relatively single in function and inconvenient for a user to use.
A first aspect of the present invention provides a control system for charging and discharging, applied to a battery pack including a power supply terminal and at least one Type-C interface, the communication control system including:
the first control unit is electrically connected with the power supply terminal and is used for communicating with an access device on the power supply terminal;
the second control unit is electrically connected with each Type-C interface and is used for communicating with the access equipment on each Type-C interface;
the first control unit is in communication connection with the second control unit.
In an embodiment of the invention, the second control unit is communicatively connected to the access device on each Type-C interface through a Type-C communication protocol.
In an embodiment of the present invention, the communication control system further includes:
and the terminal communication unit is connected between the power supply terminal and the first control unit in series and is used for connecting the first control unit and the access equipment on the power supply terminal in a communication mode.
In an embodiment of the present invention, the communication control system further includes:
and the Type-C communication unit is connected between each Type-C interface and the second control unit in series and is used for connecting the second control unit with the access equipment on each Type-C interface in a communication manner.
In an embodiment of the present invention, the first control unit is configured to obtain, in real time, a device type of an access device on the power supply terminal;
the second control unit is used for acquiring the device Type of the access device on each Type-C interface in real time and transmitting the device Type to the first control unit;
the first control unit is further used for charging/discharging the battery pack through the power supply terminal according to the device type of the access device on the power supply terminal; the charging/discharging control unit is also used for sending a charging/discharging instruction to the second control unit according to the equipment Type of the access equipment on each Type-C interface;
the second control unit is further configured to charge/discharge the battery pack through each Type-C interface according to the charge/discharge instruction;
wherein the device types include a charging device and a discharging device.
In an embodiment of the present invention, the first control unit is further configured to receive a battery parameter of the battery pack, obtain a battery pack status according to the battery parameter, and transmit the battery pack status to the second control unit;
the second control unit is further configured to charge/discharge the battery pack according to the battery pack state.
In an embodiment of the invention, the battery parameter is obtained by a real-time detection of the first detection unit of the battery pack and is transmitted to the first control unit.
In an embodiment of the present invention, the battery pack state includes: abnormal, normal, charge protection and discharge protection;
if any condition that the voltage of the electric core assembly is smaller than a preset first threshold value, larger than a fourth threshold value or the temperature is larger than a preset temperature threshold value is met, the state of the battery pack is abnormal, and charging/discharging is not allowed;
if the voltage of the battery pack assembly is between a preset second threshold value and a preset third threshold value, the battery pack is in a normal state, and charging/discharging can be carried out;
if the voltage of the battery pack assembly is between a preset first threshold value and a preset second threshold value, the battery pack is in a charging protection state and is only used for charging;
if the voltage of the battery pack assembly is between a preset third threshold and a preset fourth threshold, the battery pack state is discharge protection and is only used for discharging;
wherein the voltage values of the first threshold, the second threshold, the third threshold and the fourth threshold increase in sequence.
In an embodiment of the present invention, the first control unit includes a first sending end and a first receiving end, and the second control unit includes a second sending end and a second receiving end;
the first sending end is in communication connection with the second receiving end and is used for sending the battery pack state to the second control unit;
the first receiving end is in communication connection with the second sending end, and is configured to receive the device type from the first control unit.
In an embodiment of the present invention, the first sending end and the second receiving end respectively include at least two pins, each pin of the first sending end is a high-low level sending port, and the high-low level of each pin represents the state of the battery pack; and each pin of the second receiving end is a high-low level receiving port.
In an embodiment of the present invention, the first receiving end and the second sending end respectively include at least two pins, each pin of the second sending end is a high-low level sending port, and the type of the device is represented by the high-low level of each pin; and each pin of the first receiving end is a high-low level receiving port.
A second aspect of the present invention provides a control method of charging and discharging, applied to a battery pack including a power supply terminal and at least one Type-C interface, the communication control method including:
the first control unit acquires the device type of the access device on the power supply terminal;
the second control unit acquires the equipment Type of the access equipment on each Type-C interface and transmits the equipment Type to the first control unit;
the first control unit charges/discharges the battery pack according to the power supply terminal and/or the equipment Type of the access equipment on each Type-C interface;
wherein the device types include a charging device and a discharging device.
In an embodiment of the present invention, the step of obtaining the device Type of the power supply terminal and/or the access device on each Type-C interface includes:
the first control unit and/or the second control unit and the access device perform communication handshake, if the handshake is successful, the type of the communication handshake is judged, and if the type of the communication handshake is charging handshake, the access device is charging device; and if the type of the communication handshake is a discharging handshake, the communication handshake is a discharging device.
In an embodiment of the present invention, the step of the first control unit charging/discharging the battery pack according to the power supply terminal and/or the device Type of the access device on each Type-C interface includes:
if the battery pack is a charging device, judging whether a charging request sent by the charging device is received, if so, judging the working condition of the battery pack, and if the working condition of the battery pack is in a non-discharging mode, charging the battery pack;
if the battery pack is a discharging device, judging whether a discharging request sent by the discharging device is received, if so, judging the working condition of the battery pack, and if the working condition of the battery pack is in a non-charging mode, discharging the battery pack;
the working conditions of the battery pack are set by the first control unit according to the charging/discharging state of the battery pack and the connection state of the access device, and comprise a charging mode, a discharging mode and an idle mode.
In an embodiment of the present invention, the step of charging/discharging the battery pack includes:
the first control unit charges/discharges the battery pack through the power supply terminal according to the device type of the device connected to the power supply terminal;
the first control unit sends a charging/discharging instruction to the second control unit according to the equipment Type of the access equipment on each Type-C interface;
and the second control unit charges/discharges the battery pack through each Type-C interface according to the charging/discharging instruction.
In an embodiment of the present invention, the communication control method further includes:
the first control unit receives battery parameters of the battery pack battery core assembly, acquires a battery pack state according to the battery parameters and transmits the battery pack state to the second control unit;
the second control unit charges/discharges the battery pack according to the battery pack state.
In one embodiment of the present invention, the battery pack status includes power-off, protection, normal and abnormal; the battery pack state is indicated by a high-low level on the first transmitting terminal of the first control unit.
In an embodiment of the invention, the device type is indicated by a high-low level on the second transmitting end of the second control unit.
A third aspect of the present invention provides a battery pack, including a charging and discharging communication control system, a power supply terminal, and at least one Type-C interface; the communication control system is arranged in the battery pack and is in communication connection with the power supply terminal and each Type-C interface respectively;
the communication control system includes:
the first control unit is electrically connected with the power supply terminal and is used for communicating with an access device on the power supply terminal;
the second control unit is electrically connected with each Type-C interface and is used for communicating with the access equipment on each Type-C interface;
the first control unit is in communication connection with the second control unit.
As described above, the communication control system and method for charging and discharging and the battery pack according to the present invention have the following advantageous effects:
the invention supports the USB PD rapid charging protocol, is provided with three communication lines between a power supply terminal and a first control unit, between each Type-C interface and a second control unit and between the first control unit and the second control unit, and dynamically adjusts the input/output power according to the real-time data interactive execution charging/discharging protection logic in the charging/discharging process of the battery pack, thereby not only rapidly charging/discharging, but also effectively protecting the safety of the battery pack and prolonging the service life of the battery pack.
Drawings
Fig. 1 is a block diagram showing a configuration of a communication control system disclosed in the embodiment of the present invention.
Fig. 2 is a block diagram showing another configuration of the communication control system disclosed in the embodiment of the present invention.
Fig. 3 is a schematic connection diagram of the first control unit and the second control unit disclosed in the embodiment of the present invention.
Fig. 4 is a schematic connection diagram of the first control unit and the second control unit disclosed in the embodiment of the present invention.
Fig. 5 is a schematic flowchart illustrating a communication control method according to an embodiment of the present invention.
Fig. 6 is a schematic diagram showing a workflow of charging/discharging according to the device type disclosed in the embodiment of the present invention.
Fig. 7 is a schematic view showing another operation flow of the communication control method disclosed in the embodiment of the present invention.
Element number description:
100-a battery pack; 122-Type-C interface; 132-a power supply terminal; 1701-a first detection unit;
1801 — a first control unit; 1802-a second control unit; 191-terminal communication unit;
192-Type-C communication unit.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in practical implementation, and the type, quantity and proportion of the components in practical implementation can be changed freely, and the layout of the components can be more complicated.
Referring to fig. 1, an embodiment of the present invention discloses a charging and discharging communication control system, which is applied to a battery pack 100 including a power supply terminal 132 and at least one Type-C interface 122, and it should be understood that the battery pack 100 includes a cell assembly, the cell assembly includes a plurality of cells, and the cells can be combined into the cell assembly in a series-parallel manner, and the cell assembly is used for storing electric energy and can be charged/discharged through the power supply terminal 132 and/or each Type-C interface 122.
The communication control system includes: a first control unit 1801 and a second control unit 1802.
A first control unit 1801 electrically connected to the power supply terminal 132 for communicating with an access device on the power supply terminal 132;
a second control unit 1802 electrically connected to each Type-C interface 122 for communicating with an access device on each Type-C interface 122;
the first control unit 1801 is communicatively connected to the second control unit 1802.
It should be understood that the power supply terminal 132 is a commonly used connection port in a garden tool, and has various types of connection ports, and the pin thereof in this embodiment includes: p +, CHG, COM, P-.
The Type-C interface 122 is a USB standard interface, and the Type of the USB standard interface is a double-sided Type that can adapt to forward and reverse insertion, and supports a USB PD fast charging protocol (USB Power Delivery Specification, USB fast charging standard). In this embodiment, the pins of the Type-C interface 122 include VBUS, CC, D +, D ", and GND, and the second control unit 1802 is communicatively connected to the access devices on the respective Type-C interfaces 122 through the Type-C communication protocol.
In addition, the communication protocol of the Type-C interface 122 is not limited to the above standardized USB PD rapid charging protocol, but also supports a proprietary protocol, which is generally designed by each manufacturer according to the situation of the manufacturer, and this is not limited by this scheme.
The first control unit 1801 may be communicatively connected to the second control unit 1802 through a plurality of communication methods, where the communication methods include I2C bus communication, UART serial port communication, and SPI communication.
Referring to fig. 2, the communication control system obtains the device Type of the access device on the power supply terminal 132 and/or each Type-C interface 122 in real time, and also obtains the battery parameter of the battery pack in real time, and charges/discharges the battery pack 100 according to the device Type and the battery parameter, where the device Type includes a charging device and a discharging device. The following detailed description:
the first control unit 1801 is configured to obtain a device type of the device connected to the power supply terminal 132 in real time, and charge/discharge the battery pack 100 through the power supply terminal 132 according to the device type.
The second control unit 1802 is configured to obtain device types of the access devices on the Type-C interfaces 122 in real time, and transmit the device types to the first control unit 1801, where after receiving the device types of the access devices on the Type-C interfaces 122, the first control unit 1801 sends a charging/discharging instruction to the second control unit 1802 according to the device types, and the second control unit 1802 charges/discharges the battery pack 100 through the Type-C interfaces 122 according to the charging/discharging instruction.
The first control unit 1801 is further configured to receive battery parameters of the battery pack assembly of the battery pack 100, obtain a battery pack state according to the battery parameters, and transmit the battery pack state to the second control unit 1802, where the second control unit 1802 charges/discharges the battery pack 100 through each Type-C interface 122 according to the battery pack state. The battery parameters are obtained by real-time detection by the first detection unit 1701 of the battery pack 100 and transmitted to the first control unit 1801, and in this embodiment, the first detection unit 1701 and the first control unit 1801 are in communication connection through an I2C bus.
It should be understood that, in the charging/discharging process of the battery pack 100, the parameter range of the battery pack assembly can be preset according to the use requirement, and the battery pack state can be determined according to the parameter range, the battery pack state in this embodiment includes abnormal, normal, charge protection and discharge protection, in practical application, the user can further subdivide according to the requirement, specifically:
if any condition that the voltage of the electric core assembly is smaller than a preset first threshold value, larger than a fourth threshold value or the temperature is larger than a preset temperature threshold value is met, the state of the battery pack is abnormal, and charging/discharging is not allowed;
if the voltage of the battery pack assembly is between a preset second threshold and a preset third threshold, the battery pack is in a normal state, and charging/discharging can be carried out;
if the voltage of the battery pack assembly is between a preset first threshold value and a preset second threshold value, the battery pack state is charging protection and is only used for charging;
if the voltage of the battery pack assembly is between a preset third threshold and a preset fourth threshold, the battery pack state is discharge protection and is only used for discharging;
and the voltage values of the first threshold, the second threshold, the third threshold and the fourth threshold are sequentially increased.
It should be understood that the first threshold, the second threshold, the third threshold and the fourth threshold are preset values, and may be determined according to index parameters of the battery pack 100, where the index parameters generally include capacity, voltage, charging current, discharging voltage and discharging current, and a user may set the values according to needs.
Referring to fig. 2, the communication control system further includes: a terminal communication unit 191 and a Type-C communication unit 192.
And a terminal communication unit 191 connected in series between the power supply terminal 132 and the first control unit 1801, for communicatively connecting the first control unit 1801 and the access device on the power supply terminal 132.
And the Type-C communication unit 192 is connected between each Type-C interface 122 and the second control unit 1802 in series and is used for connecting the second control unit 1802 and the access equipment on each Type-C interface 122 in a communication mode.
Referring to fig. 3, the first control unit 1801 includes a first sending end and a first receiving end, and the second control unit 1802 includes a second sending end and a second receiving end; the first sending end is in communication connection with the second receiving end, and is used for sending the battery pack state to the second control unit 1802; the first receiver is communicatively coupled to the second transmitter for receiving the device type from the second control unit 1802.
The first sending end and the second receiving end respectively comprise at least two pins, each pin of the first sending end is a high-low level sending port, and the battery pack state is represented by the high-low level of each pin; each pin of the second receiving terminal is a high-low level receiving port.
The first receiving end and the second sending end respectively comprise at least two pins, each pin of the second sending end is a high-low level sending port, and the type of equipment is represented by the high-low level of each pin; each pin of the first receiving terminal is a high-low level receiving port.
Referring to fig. 4, in order to improve communication efficiency and interference rejection capability, in this embodiment, 4 groups of I/O ports are selected from the multiple I/O ports of the first control unit 1801 and the second control unit 1802 to implement data interaction, and a specific communication protocol is described as follows:
defining a first pin and a second pin of the first control unit 1801 as a first sending end, and defining a third pin and a fourth pin as a first receiving end; defining a first pin and a second pin of a second control unit 1802 as a second receiving end, and defining a third pin and a fourth pin as a second sending end; and the high level output by the first control unit 1801 and/or the second control unit 1802 is defined as 1 and the low level is defined as 0.
The first control unit 1801 obtains a battery pack state according to the battery parameters, and transmits the battery pack state to the second control unit 1802 through the high and low levels of the pins, and the second control unit 1802 charges/discharges the battery pack 100 through the Type-C interface 122 according to the battery pack state; wherein, the corresponding parameter of the battery pack state is recorded as OVP.
The second control unit 1802 performs matching of a common protocol with the access device on the Type-C interface 122, determines whether the access device is a charging device or a discharging device, and transmits the common protocol to the first control unit 1801 through the high and low levels of the pins.
The following gives a definition of the state of a battery pack:
OVP is 00, and at this time, the battery pack 100 is in an abnormal state, and charging/discharging is not allowed;
OVP is 01, and at this time, the battery pack 100 is in a normal state, and charging/discharging may be performed;
OVP is 10, at which time the battery pack 100 is in a charge protection state and is used for charging only;
at this time, the battery pack 100 is in a discharge protection state and is used only for discharging, i.e., OVP is 11.
It should be noted that the above communication protocol is still applicable to multiple Type-C interfaces 122, any Type-C interface 122 is connected with an access device provided with a Type-C interface 122, and after the communication handshake with the first control unit 1801 is successful, the first control unit 1801 can perform data interaction with the second control unit 1802.
It should be noted that, in the above embodiment, the first Processing Unit and the second Processing Unit are usually a Central Processing Unit (CPU) of the whole Digital display sensing processor system of the microcomputer, and may be configured with a corresponding operating system, a control interface, and the like, specifically, may be a Digital logic processor which can be used for automatic control, such as a single chip, a DSP (Digital Signal Processing), an ARM (Advanced RISC machines, ARM processors, and the like, and may load the control instruction into a memory at any time for storage and execution, and meanwhile, may be built with units such as a CPU instruction and a data memory, an input/output Unit, a power module, and a Digital analog, and may be specifically set according to actual use conditions, and this scheme is not limited thereto.
It can be seen that the communication control system in the above embodiment is applied to the battery pack 100 including the power supply terminal 132 and at least one Type-C interface 122, supports the USB PD fast charging protocol, and includes three communication lines between the power supply terminal 132 and the first control unit 1801, between each Type-C interface 122 and the second control unit 1802, and between the first control unit 1801 and the second control unit 1802, and during the charging/discharging process of the battery pack 100, performs the charging/discharging protection logic alternately according to real-time data, dynamically adjusts the input/output power, not only can perform the charging/discharging rapidly, but also can effectively protect the safety of the battery pack 100, and prolong the service life of the battery pack 100.
Referring to fig. 5, another embodiment of the present invention discloses a communication control method for charging and discharging, the communication control method is applied to a battery pack 100 including a power supply terminal 132 and at least one Type-C interface 122, and the communication control method includes:
step 501, the first control unit 1801 obtains the device type of the device connected to the power supply terminal 132;
step 502, the second control unit 1802 obtains the device Type of the access device on each Type-C interface 122, and transmits the device Type to the first control unit 1801;
step 503, the first control unit 1801 charges/discharges the battery pack 100 according to the device Type of the access device on the power supply terminal 132 and/or each Type-C interface 122; wherein the device type includes a charging device and a discharging device, and the device type is represented by a high-low level on the second transmitting side of the second control unit 1802.
Referring to fig. 6, the step of obtaining the device Type of the access device on the power supply terminal 132 and/or each Type-C interface 122 further includes:
the first control unit 1801 and/or the second control unit 1802 perform communication handshake with the access device, determine a type of the communication handshake if the handshake is successful, and determine that the access device is a charging device if the type of the communication handshake is charging handshake; and if the type of the communication handshake is a discharging handshake, the communication handshake is a discharging device.
Referring to fig. 6, the step of the first control unit 1801 performing charging/discharging on the battery pack 100 according to the device Type of the device connected to the power supply terminal 132 and/or each Type-C interface 122 includes:
if the battery pack is a charging device, judging whether a charging request sent by the charging device is received, if so, judging the working condition of the battery pack, and if the working condition of the battery pack is in a non-discharging mode, charging the battery pack 100 through the Type-C interface 122 and/or the power supply terminal 132;
if the battery pack is a discharging device, judging whether a discharging request sent by the discharging device is received, if so, judging the working condition of the battery pack, and if the working condition of the battery pack is in a non-charging mode, discharging the battery pack 100 through the Type-C interface 122 and/or the power supply terminal 132;
the working conditions of the battery pack comprise a charging mode, a discharging mode and an idle mode; the first control unit 1801 marks the battery pack operating condition according to the charging/discharging state of the battery pack 100 and the connection state of the access device, and specifically:
the first control unit 1801 sets the battery pack condition to the charging mode when the battery pack 100 starts charging through the Type-C interface 122 or the power supply terminal 132;
the first control unit 1801 sets the battery pack condition to the discharge mode when the battery pack 100 starts to discharge through the Type-C interface 122 or the power supply terminal 132;
the first control unit 1801 sets the battery pack status to the idle mode when there is no access device on the Type-C interface 122 or the power supply terminal 132.
To continue the description, the step of the first control unit 1801 charging/discharging the battery pack 100 includes:
the first control unit 1801 charges/discharges the battery pack 100 through the power supply terminal 132 according to the device type of the device connected to the power supply terminal 132;
the first control unit 1801 sends a charging/discharging instruction to the second control unit 1802 according to the device Type of the access device on each Type-C interface 122; the second control unit 1802 charges/discharges the battery pack 100 through each Type-C interface 122 according to the charge/discharge instruction.
Referring to fig. 7, continuing the description, the communication control method further includes:
step 701, the first control unit 1801 receives battery parameters of the battery pack assembly of the battery pack 100, obtains a battery pack state according to the battery parameters, and transmits the battery pack state to the second control unit 1802; wherein, the battery pack state comprises power-off, protection, normal and abnormal; the battery pack status is indicated by a high-low level on the first transmitting terminal of the first control unit 1801.
In step 701, the second control unit 1802 charges/discharges the battery pack 100 according to the battery pack state.
Specifically, when a charging request is received, the state of the battery pack is detected first, and charging is allowed only when the battery pack is not abnormal; when a discharging request is received, the state of the battery pack is detected firstly, and discharging is allowed when the battery pack is normal, so that damage to the battery pack assembly and influence on the service life of the battery pack assembly caused by over-charging or under-voltage are avoided.
During the charging/discharging process, the second control unit 1802 also detects the state of the battery pack in real time, and stops the charging/discharging process if an abnormality occurs, thereby protecting the battery cells from being damaged.
It can be seen that the communication control method in the foregoing embodiment is applied to the battery pack 100 including the power supply terminal 132 and at least one Type-C interface 122, supports the USB PD fast charging protocol, and includes three communication lines between the power supply terminal 132 and the first control unit 1801, between each Type-C interface 122 and the second control unit 1802, and between the first control unit 1801 and the second control unit 1802, and during the charging/discharging process of the battery pack 100, executes the charging/discharging protection logic according to real-time data interaction, dynamically adjusts the input/output power, thereby not only performing fast charging/discharging, but also effectively protecting the safety of the battery pack 100, and prolonging the service life of the battery pack 100.
Referring to fig. 1, another embodiment of the present invention discloses a battery pack 100, which includes a charging/discharging communication control system, a power supply terminal 132, and at least one Type-C interface 122; the communication control system is arranged in the battery pack 100 and is respectively in communication connection with the power supply terminal 132 and each Type-C interface 122;
the communication control system includes:
a first control unit 1801 electrically connected to the power supply terminal 132 for communicating with an access device on the power supply terminal 132;
a second control unit 1802 electrically connected to each Type-C interface 122 for communicating with an access device on each Type-C interface 122;
the first control unit 1801 is communicatively connected to the second control unit 1802.
It can be seen that the battery pack 100 in this embodiment supports the USB PD fast charging protocol, and has three communication lines between the power supply terminal 132 and the first control unit 1801, between each Type-C interface 122 and the second control unit 1802, and between the first control unit 1801 and the second control unit 1802, and during the charging/discharging process of the battery pack 100, the charging/discharging protection logic is executed according to real-time data interaction, so as to dynamically adjust the input/output power, thereby not only performing charging/discharging rapidly, but also effectively protecting the safety of the battery pack 100, and prolonging the service life of the battery pack 100.
In summary, the charging and discharging communication control system, method and battery pack according to the present invention support the USB PD fast charging protocol, and have three communication lines between the power supply terminal 132 and the first control unit 1801, between each Type-C interface 122 and the second control unit 1802, and between the first control unit 1801 and the second control unit 1802, during the charging and discharging process of the battery pack 100, the charging and discharging protection logic is executed according to real-time data interaction, so as to dynamically adjust the input/output power, thereby not only performing the charging and discharging rapidly, but also effectively protecting the safety of the battery pack 100 and prolonging the service life of the battery pack 100. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (19)

1. A communication control system of charging and discharging is characterized in that, applied to a battery pack including a power supply terminal and at least one Type-C interface, the communication control system includes:
the first control unit is electrically connected with the power supply terminal and is used for communicating with an access device on the power supply terminal;
the second control unit is electrically connected with each Type-C interface and is used for communicating with the access equipment on each Type-C interface;
the first control unit is in communication connection with the second control unit.
2. The charge/discharge communication control system according to claim 1, characterized in that: and the second control unit is in communication connection with the access equipment on each Type-C interface through a Type-C communication protocol.
3. The charge and discharge communication control system according to claim 1, further comprising:
and the terminal communication unit is connected between the power supply terminal and the first control unit in series and is used for connecting the first control unit and the access equipment on the power supply terminal in a communication mode.
4. The charge and discharge communication control system according to claim 1, further comprising:
and the Type-C communication unit is connected between each Type-C interface and the second control unit in series and is used for connecting the second control unit with the access equipment on each Type-C interface in a communication manner.
5. The charge/discharge communication control system according to claim 1, characterized in that:
the first control unit is used for acquiring the equipment type of the equipment connected to the power supply terminal in real time;
the second control unit is used for acquiring the device Type of the access device on each Type-C interface in real time and transmitting the device Type to the first control unit;
the first control unit is further used for charging/discharging the battery pack through the power supply terminal according to the device type of the access device on the power supply terminal; the charging/discharging control unit is also used for sending a charging/discharging instruction to the second control unit according to the equipment Type of the access equipment on each Type-C interface;
the second control unit is further configured to perform charging/discharging on the battery pack through each Type-C interface according to the charging/discharging instruction;
wherein the device types include a charging device and a discharging device.
6. The charge/discharge communication control system according to claim 5, characterized in that:
the first control unit is also used for receiving battery parameters of the battery pack battery core assembly, acquiring a battery pack state according to the battery parameters and transmitting the battery pack state to the second control unit;
the second control unit is further configured to charge/discharge the battery pack according to the battery pack state.
7. The charge and discharge communication control system according to claim 6, wherein the battery parameter is obtained by real-time detection of the first detection unit of the battery pack and transmitted to the first control unit.
8. The charge-discharge communication control system according to claim 5, wherein the battery pack state includes: abnormal, normal, charge protection and discharge protection;
if any condition that the voltage of the electric core assembly is smaller than a preset first threshold value, larger than a fourth threshold value or the temperature is larger than a preset temperature threshold value is met, the state of the battery pack is abnormal, and charging/discharging is not allowed;
if the voltage of the battery pack assembly is between a preset second threshold value and a preset third threshold value, the battery pack is in a normal state, and charging/discharging can be carried out;
if the voltage of the battery pack assembly is between a preset first threshold value and a preset second threshold value, the battery pack state is charging protection and is only used for charging;
if the voltage of the battery pack assembly is between a preset third threshold and a preset fourth threshold, the battery pack state is discharge protection and is only used for discharging;
wherein the voltage values of the first threshold, the second threshold, the third threshold and the fourth threshold increase in sequence.
9. The charge and discharge communication control system according to claim 5, wherein the first control unit includes a first transmitting terminal and a first receiving terminal, and the second control unit includes a second transmitting terminal and a second receiving terminal;
the first sending end is in communication connection with the second receiving end and is used for sending the battery pack state to the second control unit;
the first receiving end is in communication connection with the second sending end, and is configured to receive the device type from the first control unit.
10. The charge and discharge communication control system according to claim 9, wherein the first transmitting terminal and the second receiving terminal respectively include at least two pins, each pin of the first transmitting terminal is a high/low level transmitting port, and the battery pack state is indicated by the high/low level of each pin; and each pin of the second receiving end is a high-low level receiving port.
11. The charge and discharge communication control system according to claim 9, wherein the first receiving terminal and the second transmitting terminal respectively include at least two pins, each pin of the second transmitting terminal is a high/low level transmitting port, and the device type is indicated by the high/low level of each pin; and each pin of the first receiving end is a high-low level receiving port.
12. A communication control method for charging and discharging is applied to a battery pack comprising a power supply terminal and at least one Type-C interface, and is characterized by comprising the following steps:
the first control unit acquires the device type of the access device on the power supply terminal;
the second control unit acquires the equipment Type of the access equipment on each Type-C interface and transmits the equipment Type to the first control unit;
the first control unit charges/discharges the battery pack according to the power supply terminal and/or the equipment Type of the access equipment on each Type-C interface;
wherein the device types include a charging device and a discharging device.
13. The charging and discharging communication control method according to claim 12, wherein the step of acquiring a device Type of a device connected to the power supply terminal and/or each Type-C interface comprises:
the first control unit and/or the second control unit perform communication handshake with the access device, the type of the communication handshake is judged if the handshake is successful, and the access device is a charging device if the type of the communication handshake is charging handshake; and if the type of the communication handshake is a discharging handshake, the communication handshake is a discharging device.
14. The communication control method for charging and discharging according to claim 12, wherein the step of the first control unit charging/discharging the battery pack according to a device Type of an access device on the power supply terminal and/or each Type-C interface comprises:
if the battery pack is a charging device, judging whether a charging request sent by the charging device is received, if so, judging the working condition of the battery pack, and if the working condition of the battery pack is in a non-discharging mode, charging the battery pack;
if the battery pack is a discharging device, judging whether a discharging request sent by the discharging device is received, if so, judging the working condition of the battery pack, and if the working condition of the battery pack is in a non-charging mode, discharging the battery pack;
the working conditions of the battery pack are set by the first control unit according to the charging/discharging state of the battery pack and the connection state of the access device, and comprise a charging mode, a discharging mode and an idle mode.
15. The communication control method of charge and discharge according to claim 14, wherein the step of charging/discharging the battery pack includes:
the first control unit charges/discharges the battery pack through the power supply terminal according to the device type of the device connected to the power supply terminal;
the first control unit sends a charging/discharging instruction to the second control unit according to the equipment Type of the access equipment on each Type-C interface;
and the second control unit charges/discharges the battery pack through each Type-C interface according to the charging/discharging instruction.
16. The communication control method of charging and discharging according to claim 14, characterized by further comprising:
the first control unit receives battery parameters of the battery pack battery core assembly, acquires a battery pack state according to the battery parameters and transmits the battery pack state to the second control unit;
the second control unit charges/discharges the battery pack according to the battery pack state.
17. The communication control method of charge and discharge according to claim 16, wherein the battery pack state includes power-off, protection, normal, and abnormal; the battery pack state is indicated by a high-low level on the first transmitting terminal of the first control unit.
18. The charge/discharge communication control method according to claim 12, characterized in that: the device type is indicated by a high-low level on the second transmitting end of the second control unit.
19. A battery pack is characterized by comprising a charging and discharging communication control system, a power supply terminal and at least one Type-C interface; the communication control system is arranged in the battery pack and is in communication connection with the power supply terminal and each Type-C interface respectively;
the communication control system includes:
the first control unit is electrically connected with the power supply terminal and is used for communicating with an access device on the power supply terminal;
the second control unit is electrically connected with each Type-C interface and is used for communicating with the access equipment on each Type-C interface;
the first control unit is in communication connection with the second control unit.
CN202110599056.3A 2020-11-06 2021-05-28 Charging and discharging communication control system and method and battery pack Pending CN114448012A (en)

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CA3220576A CA3220576A1 (en) 2021-05-28 2022-04-15 Battery pack, power tool system, and charging system
PCT/CN2022/087124 WO2022247517A1 (en) 2021-05-28 2022-04-15 Battery pack, electric tool system, and charging system
EP22810250.5A EP4350866A1 (en) 2021-05-28 2022-04-15 Battery pack, electric tool system, and charging system
AU2022282142A AU2022282142A1 (en) 2021-05-28 2022-04-15 Battery pack, electric tool system, and charging system
US18/519,071 US20240088506A1 (en) 2021-05-28 2023-11-27 Battery pack, power tool system and charging system

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CN220400799U (en) 2024-01-26
CN218548687U (en) 2023-02-28
CN114448013A (en) 2022-05-06
CN114447457A (en) 2022-05-06
CN215911524U (en) 2022-02-25
CN218939917U (en) 2023-04-28
CN114448010A (en) 2022-05-06
CN114448007A (en) 2022-05-06
CN114447533B (en) 2023-07-18
CN215418445U (en) 2022-01-04
CN114447507B (en) 2023-03-10
CN214797631U (en) 2021-11-19
CN114448009A (en) 2022-05-06
CN114447507A (en) 2022-05-06
CN114448011A (en) 2022-05-06
CN218939916U (en) 2023-04-28
CN114530899A (en) 2022-05-24
CN114447450A (en) 2022-05-06
CN114530900A (en) 2022-05-24
CN114448008A (en) 2022-05-06

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