WO2023125012A1 - Battery management system and battery pack - Google Patents

Battery management system and battery pack Download PDF

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Publication number
WO2023125012A1
WO2023125012A1 PCT/CN2022/139049 CN2022139049W WO2023125012A1 WO 2023125012 A1 WO2023125012 A1 WO 2023125012A1 CN 2022139049 W CN2022139049 W CN 2022139049W WO 2023125012 A1 WO2023125012 A1 WO 2023125012A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
battery
module
battery management
data
Prior art date
Application number
PCT/CN2022/139049
Other languages
French (fr)
Chinese (zh)
Inventor
鲁志健
Original Assignee
南京泉峰科技有限公司
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Publication date
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Publication of WO2023125012A1 publication Critical patent/WO2023125012A1/en

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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
    • 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
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or 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
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • 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
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • 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

Definitions

  • the present application relates to the technical field of energy storage, for example, to a battery management system and a battery pack.
  • the power battery pack can provide power supply for different DC electric tools.
  • Each battery pack has a battery management system (Battery Management System, BMS).
  • BMS Battery Management System
  • BMS is used as a control system to control the safety of the battery pack. It can monitor the battery status at all times and ensure the use of the battery pack through some necessary control measures. Safety.
  • the cell pack of the battery pack needs to be connected to the BMS module through a cable, and then output the state parameters of the cells in the battery pack, such as current, voltage, temperature, etc. Therefore, the more battery packs in the battery pack, the more cables there will be, which makes the wiring in the entire battery pack more complicated, and faults that affect reliability are prone to occur between the wire harness and the connector, increasing maintenance costs.
  • thicker cables are usually used, which not only increases the volume of the battery pack, but also affects the endurance of the battery pack.
  • the present application provides a battery pack management system capable of transmitting battery pack data through wireless communication and managing the battery pack.
  • a battery management system suitable for electric tools comprising: at least one battery pack; the battery pack includes at least one set of battery cells; a power port, used to output electric energy to power the electric tool; a data acquisition module, and At least one battery pack is connected, configured to collect the state data of the connected battery pack; the data transmission module is used to output the state data of the battery pack by wireless communication; the battery management system also includes: battery management A module, configured to obtain the state data of the battery pack, and manage the use state of the battery pack according to the state data; the battery management module is set inside the battery pack or inside the electric tool or an external terminal inside the device.
  • a battery pack suitable for an electric tool comprising: a casing; a cell set housed in the casing and configured to supply power to the electric tool; a power port used to output the power of the cell set; a data acquisition module , connected to at least one battery pack, set to collect the state data of the connected battery pack; the data transmission module is used to output the state data of the battery pack in a wireless communication manner; the battery management module is set to acquire the state data of the battery pack The state data of the battery pack, and manage the use state of the battery pack according to the state data; the battery management module is set in the housing; the data transmission module can output the state in a wireless communication manner data to the power tool.
  • FIG. 1 is a schematic structural diagram of a battery management system in an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a battery management system in another embodiment of the present application.
  • Fig. 3 is a schematic structural view of a battery pack in an embodiment
  • Fig. 4 is a schematic structural diagram of a battery pack in an embodiment.
  • the present disclosure mainly improves the communication method between the battery pack and the battery management system, or in other words, the electric tool or the charger.
  • the battery pack may only include power ports, ie, a positive output port and a negative output port, without communication ports.
  • the cable between the battery pack inside the battery pack and the communication port will also no longer exist, which reduces the complexity of wiring inside the battery pack to a certain extent.
  • the battery pack without a communication port still needs to perform data communication with external devices such as BMS or electric tools or chargers, so this disclosure will provide multiple communication methods to meet the data monitoring and management functions of the battery pack.
  • the battery pack in this application can be used in electric tools, electric vehicles, or other devices capable of using DC power supply.
  • the battery management system 100a as shown in FIG. 103 and the data transmission module 104, wherein the power port 102 includes a positive output port 1021 and a negative output port 1022.
  • the battery management module 200 may be a BMS module set in the battery pack 100 or a BMS module set in other battery packs or a control module set in an electric tool or a control module set in a charger or an integrated battery Smart terminals for users with management functions.
  • the application does not limit the type and location of the battery management module 200 .
  • the battery management module 200 is configured to obtain status data of the battery pack 100 through wireless communication, and control the usage status of the battery pack 100 accordingly.
  • the state data such as output voltage, current and temperature of the cell pack 101 in the battery pack 100 are obtained, and the charging and discharging of the battery pack 100 or the charging and discharging of any cell pack 101 in the battery pack 100 are controlled according to the monitored data.
  • the battery pack 101 in this application may be composed of a plurality of battery cells 1011, and each battery cell 1011 is a minimum unit of a single battery.
  • a plurality of batteries 1011 are electrically connected in series and/or in parallel to form a battery pack 101 .
  • the data collection module 103 in this application may be a voltage sensor, a current sensor, a temperature sensor or other electrical components capable of collecting data related to the battery pack 101 .
  • the data transmission module 104 can be integrated with the data collection module 103, and can also be set to provide independent power supply to support wireless communication.
  • the data transmission module 104 and the data collection module 103 may be two independent modules.
  • the data transmission module 104 and the data collection module 103 may be an integrated unit, and this unit has functions of data collection and data wireless transmission.
  • the data transmission module 104 may support at least one of multiple wireless communication methods such as Bluetooth communication, radio frequency communication, Long Term Evolution (LTE), and ZigBee communication. It can be understood that the data transmission module 104 and the battery management module 200 respectively have a data transmitter and a receiver for wireless communication. For example, if the data transmission module 104 has a transmitting antenna, the battery management module 200 has a receiving antenna, and if the data transmission module 104 has a receiving antenna, then the battery management module 200 has a transmitting antenna.
  • the battery management system 100a may further include a network distribution unit. The network distribution unit can select the optimal wireless communication method as the currently used communication method according to all the supported wireless communication methods detected by the data transmission module 104 .
  • the data transmission module 104 supports Bluetooth and wireless network (wifi) at the same time, and when the distribution network unit detects that the Bluetooth signal is strong, it can trigger the data transmission module 104 to use Bluetooth communication to perform data interaction.
  • the battery pack 100 may include at least one data acquisition module 103 .
  • a data collection module 103 can collect state data of at least one set of battery packs 101 .
  • the identification information may be the number (Identity Document, ID) or location information of the battery pack 101, which can uniquely determine the identity of the battery pack 101. . Therefore, when the data collection module 103 collects the state data of the battery pack 101 , it also correspondingly acquires the identification information of the battery pack 101 .
  • all the batteries 1011 in the battery pack 101 also have a unique battery identification.
  • the identification information of the cell group 101 may include cell identifications of all the cells 1011 constituting the cell group.
  • any one data collection module 103 in the battery pack 100 can communicate wirelessly with at least one other data collection module 103 .
  • the data collection module 103 may transmit different communication data based on different channels, or communicate with different objects based on different channels.
  • different data acquisition modules 103 in a battery pack 100 may communicate based on the first channel.
  • the data transmission modules 104 between different battery packs may use the second channel for communication. The communication frequencies of the first channel and the second channel are different. It can be understood that the data transmission modules in different tools or battery packs can form a wireless local area network, and exchange data in the wireless local area network.
  • the networking mode is not limited here.
  • the data transmission module 104 can output the verification information while transmitting the state data, and when the data acquisition module inside the battery pack 100 or outside the battery pack 100 receives the above state data, it can obtain the verification information, and Receive status data after verification is passed. The accuracy of the status data transmission of the battery pack is guaranteed.
  • the data transmission module 104 may send the above-mentioned verification information to a user terminal, such as a smart phone, and after the user confirms and enters the verification code information on the battery pack or electric tool where the battery management module 200 is located, the battery management The module 200 may receive the above status data.
  • the above check information may be a check code.
  • the data transmission module 104 may also send verification information before sending the status data.
  • the data transmission module 104 transmits the state data of the battery pack 100 at a time for less than or equal to 500 ms, so as to reduce the probability of adding noise in the transmitted data.
  • the battery management module 200 has a quiescent current.
  • the so-called quiescent current refers to the standby current when the battery management module 200 is in a standby state, or the average work when the battery management module 200 acquires data at a frequency lower than 5 Hz. current.
  • the battery management module 200 may have multiple working modes.
  • the battery management module 200 may include a low power consumption mode, a sleep mode, a deep sleep mode and a shutdown mode.
  • the working current corresponding to the above four working modes decreases in turn.
  • the working current of the battery management module 200 in the low power consumption mode is basically A1
  • the working current in the sleep mode is basically A2
  • the current in the deep sleep mode is basically A3.
  • the working current is zero, where A1>A2>A3>0.
  • the battery management module 200 can control at least one battery pack 101 to be powered on or off.
  • the BMS module detects that the state data stored in a cell group 101 is abnormal (for example, the temperature is higher than the preset temperature), it will disconnect the electrical connection between the cell group 101 and the power port 102, and no longer use The battery pack 101 supplies power or no longer charges the battery pack 101 .
  • the battery management module 200 may acquire the state data of the battery pack at a preset frequency or a preset period, for example, once every 1 second. It can be understood that when the battery management module 200 obtains the state data of the battery pack 101 , it will also know the identification information of the battery pack 101 at the same time. That is to say, if all the battery packs 101 are working normally, the battery management module 200 can acquire the state data of all the battery packs 101 and the corresponding identification information of all the battery packs 101 every preset frequency. Therefore, the battery management module 200 can determine whether all the battery packs 101 are working normally by comparing whether the identification information of all the battery packs 101 is detected each time, or determine whether the wireless communication links of all the battery packs 101 are normal Work.
  • the battery management module 200 will output a control signal to disconnect the electrical connection between the first battery pack corresponding to the first identification information and the power port 102 . That is to say, when any battery pack is working abnormally or the communication link is disconnected, the battery management module 200 can remove the battery pack from the charging circuit or discharging circuit of the battery pack 100 .
  • the battery management module 200 may compare each received state data of the battery pack 101 with a preset data threshold to determine whether the received state data is abnormal. For example, after receiving the temperature data of the battery pack 101 , it is compared with the preset temperature threshold, and when the temperature data is higher than the preset temperature threshold, it is determined that the temperature data is abnormal state data. Furthermore, according to the corresponding relationship between the state data and the identification information, the second identification information corresponding to the abnormal state data is determined.
  • the battery management module 200 may output a control signal to disconnect the electrical connection between the second battery module corresponding to the second identification information and the power port 102 . That is to say, when the status data of any battery pack 101 is abnormal, the battery management module 200 can remove the battery pack 101 from the charging circuit or discharging circuit of the battery pack 100 .
  • the battery management module 200 can confirm that the battery pack has stopped charging and discharging, so that the battery management module 200 automatically enters low power consumption. model. Later, when the battery pack 100 starts to work again, the battery management module 200 can be woken up from the low power consumption mode according to the user's switch operation on the tool side or the switch operation on the battery pack 100 .
  • the battery management module 200 can monitor the status data of the battery pack 100 in a more timely manner through wireless communication, which ensures the timeliness of the battery pack 100's working status control response.
  • the battery management module 200 can obtain power from the battery pack 100, or obtain power from any group of battery packs 101 in the battery pack 100, or obtain power based on an independent power module.
  • the independent power supply module may be a button battery or other small DC power supply devices.
  • the battery management module 200 may obtain power from the battery pack 100 where the data transmission module 104 is located based on wireless charging while performing data interaction with the data transmission module 104 .
  • the battery management module 200 may also obtain power from the battery pack or the electric tool side by means of electromagnetic charging.
  • the battery management system 100a may also include an independent power generation unit, which is set on a battery pack or an electric tool or a charger, and can generate power by means of vibration, pressing, or sound.
  • the independent power generation unit can be set in the battery management module 200 or around the battery management module, so as to supply the generated power to the battery management module 200 .
  • the battery management module 200 may also include an electric energy storage unit, which can store electric energy generated by wireless charging, electromagnetic charging, vibration power generation, pressing power generation, etc., to provide power for the battery management module 200 .
  • the battery management system 100a further includes a data storage module (not shown).
  • the data storage module can store the state data of all battery packs, or only store the abnormal state data and/or the second identification information. During follow-up maintenance, you only need to find the abnormal state data or the second identification information from the data storage module to locate the abnormal battery pack or obtain the cause of the abnormal battery pack, which is convenient for later maintenance.
  • the data storage module can be set in the battery pack 100 , and can also be set in an electric tool or a charger.
  • Fig. 2 shows a battery management system 300a according to another embodiment of the present application, including a battery pack 300 and a battery management module 400, wherein the battery pack 300 includes multiple sets of battery packs 301, power ports 302, and carrier communication units 303, wherein the power
  • the ports 302 include a positive output port 3021 and a negative output port 3022 .
  • this embodiment is different in that it does not include a data collection module and a data transmission module, but includes a carrier communication unit 303 .
  • the carrier communication unit 303 can collect the state data of each battery pack and transmit it to the battery management module 400 .
  • the battery management module 400 may also be a BMS module set in the battery pack 300 or a BMS module set in other battery packs or a control module set in an electric tool or a control module set in a charger or an integrated Smart terminals for users with battery management functions.
  • the present embodiment also does not limit the type and location of the battery management module 400 .
  • the battery management module 400 is configured to obtain the status data of the battery pack 300 through carrier communication, and control the usage status of the battery pack 300 accordingly.
  • state data such as the output voltage, current, and temperature of the battery pack 301 in the battery pack 300
  • control the charging and discharging of the battery pack 300 or the charging and discharging of any battery pack 301 in the battery pack 300 according to the monitored data .
  • the carrier communication unit 303 is integrated on each battery cell 3011 , and can collect state data of all battery cells 3011 instead of collecting data of a group of battery cells 301 .
  • the carrier communication unit 303 sends the state data to the battery management module 400 on a continuous high-frequency carrier.
  • the battery pack 300 does not need to be provided with a communication port, nor does it need to be provided with a communication cable for connecting the battery cell or the battery pack to the communication port. The effect of reducing the wiring complexity in the battery pack 300 is also achieved.
  • the battery management module 400 can calculate the state of charge (State of Charge, SOC) of the battery pack 300 according to the state data of all the battery cells 3011, State of Power (State Of Power, SOP), State of Health (State of Health, SOH) and other state information, and the accuracy of the calculated state information of the battery pack can be guaranteed due to sufficient raw data.
  • SOC state of Charge
  • SOP State of Power
  • SOH State of Health
  • the battery pack 500 includes a casing 501 , a cell pack 502 , a cell 503 , a power port 504 , a data acquisition module 505 , a data transmission module 506 and a battery management module 507 .
  • the casing 501 may be a detachable sealed box, and the sealed box may have openings for a positive output port 5041 and a negative output port 5042 .
  • a plurality of batteries 503 form a battery pack 502 in series and/or in parallel.
  • the data acquisition module 505 can be various sensor devices, such as temperature sensors, voltage sensors, and current sensors.
  • the data transmission module 506 can be integrated on the data acquisition module 505 to output the state data of the battery cell or the battery pack in a wireless communication manner.
  • the battery management module 507 is a BMS management module, which can be located in the battery pack 500 , or in an electric tool powered by the battery pack 500 or in a charger. It can be understood that the BMS module is integrated with various components such as a controller, a processor, a memory, and a transceiver.
  • the battery pack 500 protected in this embodiment can be applied in the battery management system of the above embodiments.
  • the battery pack 600 includes a casing 601, a cell pack 602, a cell 603, a power port 604, a carrier communication unit 605, and a battery management module 606, wherein the power port 604 includes a positive output port 6041 and negative output port 6042.
  • the carrier communication unit 605 in the battery pack 600 is a carrier chip integrated on each battery cell 603 , which can output the status data of the battery cells in the form of carrier communication.
  • the state data output of the cell group in the battery pack that can be monitored by this application without the use of cables reduces the complexity of wiring in the battery pack and facilitates later maintenance, and also reduces the power consumption inside the battery pack due to the reduction of cables Improved battery life.

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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)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Disclosed in the present application are a battery management system and a battery pack. The system comprises at least one battery pack and a battery management module. The battery pack comprises a plurality of battery cell groups; a power port, which is used for outputting power of the battery cell groups; a data acquisition module, which is connected to at least one battery cell group and is configured to acquire state data of the battery cell group connected thereto; and a data transmission module, which is connected to the data acquisition module and outputs the state data of the battery cell group in a wireless communication mode. The battery management module is in wireless communication with the data transmission module so as to obtain state data of the battery cell groups and to manage a use state of the battery pack according to the state data. The battery management module is arranged in the battery pack or in an electric tool or in an external terminal device.

Description

电池管理***及电池包Battery management system and battery pack
本申请要求在2021年12月27日提交中国专利局、申请号为202111609918.2的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。This application claims priority to a Chinese patent application with application number 202111609918.2 filed with the China Patent Office on December 27, 2021, the entire contents of which are incorporated herein by reference.
技术领域technical field
本申请涉及能量存储技术领域，例如涉及一种电池管理***及电池包。The present application relates to the technical field of energy storage, for example, to a battery management system and a battery pack.
背景技术Background technique
动力电池包作为一种电能储备装置，可以为不同的直流电动工具提供供电电能。每个电池包均具有一套电池管理***(Battery Management System，BMS)，BMS作为控制电池包使用安全的控制***，能时刻监控电池的使用状态，通过一些必要的控制措施能保证电池包的使用安全。As an electric energy storage device, the power battery pack can provide power supply for different DC electric tools. Each battery pack has a battery management system (Battery Management System, BMS). BMS is used as a control system to control the safety of the battery pack. It can monitor the battery status at all times and ensure the use of the battery pack through some necessary control measures. Safety.
然而，电池包的电芯组需要通过电缆连接BMS模块，进而输出电池包中电芯的状态参数，例如电流、电压、温度等。从而电池包中电芯组越多电缆也越多，造成整个电池包内的布线比较复杂，且线束和连接器之间也容易出现影响可靠性的故障，增加维护成本。另外，为了增加线束的可靠性，通常会使用较粗的电缆，在增加电池包体积的同时，也影响了电池包的续航能力。However, the cell pack of the battery pack needs to be connected to the BMS module through a cable, and then output the state parameters of the cells in the battery pack, such as current, voltage, temperature, etc. Therefore, the more battery packs in the battery pack, the more cables there will be, which makes the wiring in the entire battery pack more complicated, and faults that affect reliability are prone to occur between the wire harness and the connector, increasing maintenance costs. In addition, in order to increase the reliability of the wiring harness, thicker cables are usually used, which not only increases the volume of the battery pack, but also affects the endurance of the battery pack.
发明内容Contents of the invention
为解决相关技术的不足，本申请提供一种能进行无线通信传输电池包数据并管理电池包的电池包管理***。In order to solve the deficiencies of related technologies, the present application provides a battery pack management system capable of transmitting battery pack data through wireless communication and managing the battery pack.
为了实现上述目标，本申请采用如下的技术方案：In order to achieve the above goals, the application adopts the following technical solutions:
一种适用于电动工具的电池管理***，包括：至少一个电池包；所述电池包包括至少一组电芯组；电力端口，用以输出电能以给所述电动工具供电；数据采集模块，与至少一个电芯组连接，设置为采集所连接的电芯组的状态数据； 数据传输模块，用以无线通信的方式输出所述电芯组的状态数据；所述电池管理***还包括：电池管理模块，设置为获取所述电芯组的状态数据，并根据所述状态数据管理所述电池包的使用状态；所述电池管理模块设置在所述电池包内部或者所述电动工具内或者外部终端设备内。A battery management system suitable for electric tools, comprising: at least one battery pack; the battery pack includes at least one set of battery cells; a power port, used to output electric energy to power the electric tool; a data acquisition module, and At least one battery pack is connected, configured to collect the state data of the connected battery pack; the data transmission module is used to output the state data of the battery pack by wireless communication; the battery management system also includes: battery management A module, configured to obtain the state data of the battery pack, and manage the use state of the battery pack according to the state data; the battery management module is set inside the battery pack or inside the electric tool or an external terminal inside the device.
一种适用于电动工具的电池包，包括：壳体；电芯组，容纳于所述壳体内，设置为向电动工具供电；电力端口，用以输出所述电芯组的电力；数据采集模块，与至少一个电芯组连接，设置为采集所连接的电芯组的状态数据；数据传输模块，用以无线通信的方式输出所述电芯组的状态数据；电池管理模块，设置为获取所述电芯组的状态数据，并根据所述状态数据管理所述电池包的使用状态；所述电池管理模块设置在所述壳体内；所述数据传输模块能以无线通信的方式输出所述状态数据至所述电动工具。A battery pack suitable for an electric tool, comprising: a casing; a cell set housed in the casing and configured to supply power to the electric tool; a power port used to output the power of the cell set; a data acquisition module , connected to at least one battery pack, set to collect the state data of the connected battery pack; the data transmission module is used to output the state data of the battery pack in a wireless communication manner; the battery management module is set to acquire the state data of the battery pack The state data of the battery pack, and manage the use state of the battery pack according to the state data; the battery management module is set in the housing; the data transmission module can output the state in a wireless communication manner data to the power tool.
附图说明Description of drawings
图1是本申请的一种实施方式中电池管理***的结构示意图；FIG. 1 is a schematic structural diagram of a battery management system in an embodiment of the present application;
图2是本申请的另一种实施方式中电池管理***的结构示意图；FIG. 2 is a schematic structural diagram of a battery management system in another embodiment of the present application;
图3是一种实施方式中电池包的结构示意图；Fig. 3 is a schematic structural view of a battery pack in an embodiment;
图4是一种实施方式中电池包的结构示意图。Fig. 4 is a schematic structural diagram of a battery pack in an embodiment.
具体实施方式Detailed ways
此外，为了简洁起见，在此可以不详细描述单个组件的某些子组件以及***的其他方面。应当注意，在实际***中，例如电池管理***中，可能存在许多替代或附加功能关系或物理耦合。可以通过被配置为执行指定功能的任何数量的合适组件来实现此类功能块。Furthermore, certain subcomponents of individual components, as well as other aspects of the systems, may not be described in detail herein for the sake of brevity. It should be noted that in an actual system, such as a battery management system, many alternative or additional functional relationships or physical couplings may exist. Such functional blocks may be realized by any number of suitable components configured to perform the specified functions.
本公开主要改进了电池包与电池管理***或者说与电动工具或者与充电器等的通信方式。在本申请中，电池包可以只包含电力端口即正极输出端口和负极输出端口而不具有通信端口。在不具有通信端口的前提下，电池包内部的电 芯组与通信端口之间的电缆也将不复存在，这在一定程度上减少了电池包内部的布线复杂度。然而，不具有通信端口的电池包仍需与BMS或者电动工具或者充电器等外部设备进行数据通信，因此本公开将提供多种通信方式来满足电池包的数据监控及管理等功能。需要说明的是，本申请中的电池包可用于电动工具、电动汽车、或者其他能够使用直流供电的设备。The present disclosure mainly improves the communication method between the battery pack and the battery management system, or in other words, the electric tool or the charger. In this application, the battery pack may only include power ports, ie, a positive output port and a negative output port, without communication ports. On the premise that there is no communication port, the cable between the battery pack inside the battery pack and the communication port will also no longer exist, which reduces the complexity of wiring inside the battery pack to a certain extent. However, the battery pack without a communication port still needs to perform data communication with external devices such as BMS or electric tools or chargers, so this disclosure will provide multiple communication methods to meet the data monitoring and management functions of the battery pack. It should be noted that the battery pack in this application can be used in electric tools, electric vehicles, or other devices capable of using DC power supply.
在本申请的第一个实施例中，电池管理***100a如图1所示，包括电池包100和电池管理模块200，其中电池包100包括多组电芯组101、电力端口102、数据采集模块103和数据传输模块104，其中，电力端口102包括正极输出端口1021和负极输出端口1022。其中，电池管理模块200可以是设置在电池包100内的BMS模块或者设置在其他电池包内的BMS模块或者设置在电动工具内的控制模块或者设置在充电器内的控制模块或者是集成了电池管理功能的用户的智能终端。本申请并不限定电池管理模块200的类型及位置。在图1所示的电池管理***100a中，电池管理模块200被配置为以无线通信的方式获取电池包100的状态数据，并据此控制电池包100的使用状态。例如，获取电池包100中电芯组101的输出电压、电流以及温度等状态数据，并根据所监控到的数据控制电池包100的充放电或者电池包100中任意电芯组101的充放电。In the first embodiment of the present application, the battery management system 100a, as shown in FIG. 103 and the data transmission module 104, wherein the power port 102 includes a positive output port 1021 and a negative output port 1022. Wherein, the battery management module 200 may be a BMS module set in the battery pack 100 or a BMS module set in other battery packs or a control module set in an electric tool or a control module set in a charger or an integrated battery Smart terminals for users with management functions. The application does not limit the type and location of the battery management module 200 . In the battery management system 100 a shown in FIG. 1 , the battery management module 200 is configured to obtain status data of the battery pack 100 through wireless communication, and control the usage status of the battery pack 100 accordingly. For example, the state data such as output voltage, current and temperature of the cell pack 101 in the battery pack 100 are obtained, and the charging and discharging of the battery pack 100 or the charging and discharging of any cell pack 101 in the battery pack 100 are controlled according to the monitored data.
示例性的，本申请中的电芯组101可以是由多个电芯1011组成，每个电芯1011为一个最小单位的单体电池。多个电芯1011以串联和/或并联的方式电气的连接形成电芯组101。Exemplarily, the battery pack 101 in this application may be composed of a plurality of battery cells 1011, and each battery cell 1011 is a minimum unit of a single battery. A plurality of batteries 1011 are electrically connected in series and/or in parallel to form a battery pack 101 .
本申请中的数据采集模块103可以是电压传感器、电流传感器、温度传感器或者其他能够采集电芯组101相关数据的电气组件。数据传输模块104可以与数据采集模块103集成一体，也可以被设置为独立供电以支持无线通信。在一个实施例中，数据传输模块104可以与数据采集模块103为两个独立的模块。在一个实施例中，数据传输模块104可以与数据采集模块103是一个集成单元，该单元具备数据采集和数据的无线传输功能。The data collection module 103 in this application may be a voltage sensor, a current sensor, a temperature sensor or other electrical components capable of collecting data related to the battery pack 101 . The data transmission module 104 can be integrated with the data collection module 103, and can also be set to provide independent power supply to support wireless communication. In an embodiment, the data transmission module 104 and the data collection module 103 may be two independent modules. In one embodiment, the data transmission module 104 and the data collection module 103 may be an integrated unit, and this unit has functions of data collection and data wireless transmission.
示例性的，数据传输模块104可以支持蓝牙通信、射频通信、长期演进通 信(Long Term Evolution，LTE)、紫蜂(ZigBee)通信等多种无线通信方式中的至少一种。可以理解的是，数据传输模块104和电池管理模块200分别具有无线通信的数据发射器和接收器。例如，数据传输模块104具有发射天线，则电池管理模块200具有接收天线，数据传输模块104具有接收天线，则电池管理模块200具有发射天线。在一个实施例中，电池管理***100a还可以包括配网单元。配网单元能根据数据传输模块104检测到的所有可支持的无线通信方式选择最优的无线通信方式作为当前所采用的通信方式。例如，数据传输模块104同时支持蓝牙和无线网络(wifi)，在配网单元检测到蓝牙信号较强时，能触发数据传输模块104采用蓝牙通信的方式进行数据交互。Exemplarily, the data transmission module 104 may support at least one of multiple wireless communication methods such as Bluetooth communication, radio frequency communication, Long Term Evolution (LTE), and ZigBee communication. It can be understood that the data transmission module 104 and the battery management module 200 respectively have a data transmitter and a receiver for wireless communication. For example, if the data transmission module 104 has a transmitting antenna, the battery management module 200 has a receiving antenna, and if the data transmission module 104 has a receiving antenna, then the battery management module 200 has a transmitting antenna. In one embodiment, the battery management system 100a may further include a network distribution unit. The network distribution unit can select the optimal wireless communication method as the currently used communication method according to all the supported wireless communication methods detected by the data transmission module 104 . For example, the data transmission module 104 supports Bluetooth and wireless network (wifi) at the same time, and when the distribution network unit detects that the Bluetooth signal is strong, it can trigger the data transmission module 104 to use Bluetooth communication to perform data interaction.
在一种实现方式中，电池包100中可以包括至少一个数据采集模块103。一个数据采集模块103可以采集至少一组电芯组101的状态数据。可以理解的是，任一组电芯组101均对应唯一的标识信息，该标识信息可以是电芯组101的编号(Identity Document，ID)或者位置信息等能够唯一确定电芯组101身份的信息。从而，数据采集模块103采集电芯组101的状态数据时，也对应的获取到该电芯组101的标识信息。可以理解的，电芯组101内的所有电芯1011也具有唯一的电芯标识。示例性的，电芯组101的标识信息可以包括组成该电芯组的所有电芯1011的电芯标识。In an implementation manner, the battery pack 100 may include at least one data acquisition module 103 . A data collection module 103 can collect state data of at least one set of battery packs 101 . It can be understood that any group of battery packs 101 corresponds to unique identification information, and the identification information may be the number (Identity Document, ID) or location information of the battery pack 101, which can uniquely determine the identity of the battery pack 101. . Therefore, when the data collection module 103 collects the state data of the battery pack 101 , it also correspondingly acquires the identification information of the battery pack 101 . It can be understood that all the batteries 1011 in the battery pack 101 also have a unique battery identification. Exemplarily, the identification information of the cell group 101 may include cell identifications of all the cells 1011 constituting the cell group.
在一个实现方式中，电池包100内的任一个数据采集模块103可以与其他至少一个数据采集模块103进行无线通信。可选的，数据采集模块103可以基于不同的信道传输不同的通信数据，或者基于不同的信道与不同的对象进行通信。示例性的，一个电池包100内的不同数据采集模块103可以基于第一信道通信。在一种实现方式中，不同电池包之间的数据传输模块104可以采用第二信道通信。第一信道和第二信道的通信频率不同。可以理解的，处于不同工具或者电池包内的数据传输模块可以组成一个无线局域网，在这个无线局域网内进行数据交互。组网方式此处不做限定。In an implementation manner, any one data collection module 103 in the battery pack 100 can communicate wirelessly with at least one other data collection module 103 . Optionally, the data collection module 103 may transmit different communication data based on different channels, or communicate with different objects based on different channels. Exemplarily, different data acquisition modules 103 in a battery pack 100 may communicate based on the first channel. In an implementation manner, the data transmission modules 104 between different battery packs may use the second channel for communication. The communication frequencies of the first channel and the second channel are different. It can be understood that the data transmission modules in different tools or battery packs can form a wireless local area network, and exchange data in the wireless local area network. The networking mode is not limited here.
在一个实现方式中，数据传输模块104在传输状态数据的同时可以输出校 验信息，电池包100内或者电池包100外的数据采集模块接收到上述状态数据时，可以获取到校验信息，并在验证通过后接收状态数据。保证了电池包的状态数据传输的准确性。可选的，数据传输模块104可以将上述校验信息发送至用户终端，如智能手机上，由用户确认并在电池管理模块200所在的电池包或者电动工具上输入校验码信息后，电池管理模块200可以接收到上述状态数据。可选的，上述校验信息可以是一种校验码。数据传输模块104也可以在发送状态数据之前发送校验信息。In one implementation, the data transmission module 104 can output the verification information while transmitting the state data, and when the data acquisition module inside the battery pack 100 or outside the battery pack 100 receives the above state data, it can obtain the verification information, and Receive status data after verification is passed. The accuracy of the status data transmission of the battery pack is guaranteed. Optionally, the data transmission module 104 may send the above-mentioned verification information to a user terminal, such as a smart phone, and after the user confirms and enters the verification code information on the battery pack or electric tool where the battery management module 200 is located, the battery management The module 200 may receive the above status data. Optionally, the above check information may be a check code. The data transmission module 104 may also send verification information before sending the status data.
在一种实施方式中，数据传输模块104一次传输电池包100的状态数据的时长小于或等于500ms，从而能够降低所传输的数据中增加噪音的概率。In one embodiment, the data transmission module 104 transmits the state data of the battery pack 100 at a time for less than or equal to 500 ms, so as to reduce the probability of adding noise in the transmitted data.
在一种实施方式中，电池管理模块200具有静态电流，所谓的静态电流是指电池管理模块200处于待机状态的待机电流，或者是电池管理模块200以低于5Hz的频率获取数据时的平均工作电流。In one embodiment, the battery management module 200 has a quiescent current. The so-called quiescent current refers to the standby current when the battery management module 200 is in a standby state, or the average work when the battery management module 200 acquires data at a frequency lower than 5 Hz. current.
在一种实施方式中，电池管理模块200可以具有多种工作模式。示例性的，电池管理模块200可包括低功耗模式、睡眠模式、深度睡眠模式以及关机模式。上述四种工作模式所对应的工作电流依次降低，例如，低功耗模式下电池管理模块200的工作电流基本为A1，睡眠模式下工作电流基本为A2，深度睡眠模式下电流基本为A3，关机模式下工作电流为零，其中，A1>A2>A3>0。In one embodiment, the battery management module 200 may have multiple working modes. Exemplarily, the battery management module 200 may include a low power consumption mode, a sleep mode, a deep sleep mode and a shutdown mode. The working current corresponding to the above four working modes decreases in turn. For example, the working current of the battery management module 200 in the low power consumption mode is basically A1, the working current in the sleep mode is basically A2, and the current in the deep sleep mode is basically A3. In mode, the working current is zero, where A1>A2>A3>0.
在一种实施方式中，电池管理模块200可以控制至少一个电芯组101上电或断电。示例性的，若BMS模块检测到某一电芯组101存储的状态数据异常(例如，温度高于预设温度)，则断开该电芯组101与电力端口102的电连接，不再采用该电芯组101供电或者不再给该电芯组101充电。In one implementation manner, the battery management module 200 can control at least one battery pack 101 to be powered on or off. Exemplarily, if the BMS module detects that the state data stored in a cell group 101 is abnormal (for example, the temperature is higher than the preset temperature), it will disconnect the electrical connection between the cell group 101 and the power port 102, and no longer use The battery pack 101 supplies power or no longer charges the battery pack 101 .
在一种实现方式中，电池管理模块200可以以预设频率或预设周期获取电芯组的状态数据，例如每1s获取一次数据。可以理解的是，电池管理模块200在获取到电芯组101的状态数据时，也会同时知悉该电芯组101的标识信息。也就是说，若所有的电芯组101均正常工作，则电池管理模块200每隔预设频率均能获取到所有的电芯组101的状态数据和对应的所有电芯组101的标识信 息。从而，电池管理模块200可对比每次是否检测到所有的电芯组101的标识信息，来确定是否所有的电芯组101均正常工作，或者确定所有电芯组101的无线通信链路均正常工作。可以理解的，若电池管理模块200在预设时间内未检测到第一标识信息，则可以认为第一标识信息对应的第一电芯组的无线通信链路中断或者该第一电芯组未正常工作，其状态数据不能有效输出。从而，电池管理模块200将输出控制信号以断开第一标识信息对应的第一电芯组与电力端口102的电连接。也就是说，任一电芯组工作异常或通信链路断开时，电池管理模块200均可以将该电芯组从电池包100的充电回路或放电回路中剔除。In an implementation manner, the battery management module 200 may acquire the state data of the battery pack at a preset frequency or a preset period, for example, once every 1 second. It can be understood that when the battery management module 200 obtains the state data of the battery pack 101 , it will also know the identification information of the battery pack 101 at the same time. That is to say, if all the battery packs 101 are working normally, the battery management module 200 can acquire the state data of all the battery packs 101 and the corresponding identification information of all the battery packs 101 every preset frequency. Therefore, the battery management module 200 can determine whether all the battery packs 101 are working normally by comparing whether the identification information of all the battery packs 101 is detected each time, or determine whether the wireless communication links of all the battery packs 101 are normal Work. It can be understood that if the battery management module 200 does not detect the first identification information within the preset time, it can be considered that the wireless communication link of the first battery pack corresponding to the first identification information is interrupted or the first battery pack is not connected. It works normally, but its status data cannot be effectively output. Therefore, the battery management module 200 will output a control signal to disconnect the electrical connection between the first battery pack corresponding to the first identification information and the power port 102 . That is to say, when any battery pack is working abnormally or the communication link is disconnected, the battery management module 200 can remove the battery pack from the charging circuit or discharging circuit of the battery pack 100 .
可以理解的，即使电池管理模块200检测到所有的电芯组101的标识信息，也不能确保所有的电芯组101的状态数据均正常。在一种实现方式中，电池管理模块200可以将每次接收的电芯组101的状态数据与预设的数据阈值进行比较，以判断接收到的状态数据是否存在异常。例如，接收到电芯组101的温度数据后，与预设温度阈值比较，在温度数据高于预设温度阈值时，确定该温度数据为异常状态数据。进而，根据状态数据和标识信息的对应关系，确定异常状态数据对应的第二标识信息。示例性的，电池管理模块200可以输出控制信号断开第二标识信息对应的第二电池模组与电力端口102的电连接。也就是说，任一电芯组101的状态数据异常时，电池管理模块200均可以将该电芯组101从电池包100的充电回路或放电回路中剔除。It can be understood that even if the battery management module 200 detects the identification information of all the battery packs 101 , it cannot ensure that the status data of all the battery packs 101 are normal. In an implementation manner, the battery management module 200 may compare each received state data of the battery pack 101 with a preset data threshold to determine whether the received state data is abnormal. For example, after receiving the temperature data of the battery pack 101 , it is compared with the preset temperature threshold, and when the temperature data is higher than the preset temperature threshold, it is determined that the temperature data is abnormal state data. Furthermore, according to the corresponding relationship between the state data and the identification information, the second identification information corresponding to the abnormal state data is determined. Exemplarily, the battery management module 200 may output a control signal to disconnect the electrical connection between the second battery module corresponding to the second identification information and the power port 102 . That is to say, when the status data of any battery pack 101 is abnormal, the battery management module 200 can remove the battery pack 101 from the charging circuit or discharging circuit of the battery pack 100 .
在一种实现方式中，电池管理模块200若在预设时间内未检测到任何电芯组101的状态数据，则可以确认电池包已停止充放电工作，从而电池管理模块200自动进入低功耗模式。后期，在电池包100再次启动工作时，可以根据用户针对工具侧的开关操作或者针对电池包100的开关操作，将电池管理模块200从低功耗模式中唤醒。In one implementation, if the battery management module 200 does not detect any state data of the battery pack 101 within a preset time, it can confirm that the battery pack has stopped charging and discharging, so that the battery management module 200 automatically enters low power consumption. model. Later, when the battery pack 100 starts to work again, the battery management module 200 can be woken up from the low power consumption mode according to the user's switch operation on the tool side or the switch operation on the battery pack 100 .
可以理解的是，电池管理模块200通过无线通信的方式可以更及时的监控到电池包100的状态数据，保证了电池包100工作状态控制响应的及时性。It can be understood that the battery management module 200 can monitor the status data of the battery pack 100 in a more timely manner through wireless communication, which ensures the timeliness of the battery pack 100's working status control response.
在一种实施方式中，电池管理模块200可以从电池包100上获取电源电力， 或者从电池包100内的任一组电芯组101上获取电力，或者基于独立的电源模块获得电力。其中，独立的电源模块可以是纽扣电池或者其他小型直流电源装置。可选的，电池管理模块200可以在与数据传输模块104进行数据交互的同时，基于无线充电的方式从数据传输模块104所在的电池包100获取电源电力。可选的，电池管理模块200还可以采用电磁充电的方式从电池包或者电动工具侧获取电源电力。可选的，电池管理***100a还可以包括独立发电单元，设置在电池包或者电动工具或者充电器上，能以震动或者按压或者声音等方式发电。可以理解的，该独立发电单元可以设置在电池管理模块200内或者设置在电池管理模块周围，以便将发电的电力供给电池管理模块200。可选的，电池管理模块200还可以包括电能存储单元，该单元能将无线充电、电磁充电或者震动发电、按压发电等方式产生的电能存储起来，以为电池管理模块200供电。In one embodiment, the battery management module 200 can obtain power from the battery pack 100, or obtain power from any group of battery packs 101 in the battery pack 100, or obtain power based on an independent power module. Wherein, the independent power supply module may be a button battery or other small DC power supply devices. Optionally, the battery management module 200 may obtain power from the battery pack 100 where the data transmission module 104 is located based on wireless charging while performing data interaction with the data transmission module 104 . Optionally, the battery management module 200 may also obtain power from the battery pack or the electric tool side by means of electromagnetic charging. Optionally, the battery management system 100a may also include an independent power generation unit, which is set on a battery pack or an electric tool or a charger, and can generate power by means of vibration, pressing, or sound. It can be understood that the independent power generation unit can be set in the battery management module 200 or around the battery management module, so as to supply the generated power to the battery management module 200 . Optionally, the battery management module 200 may also include an electric energy storage unit, which can store electric energy generated by wireless charging, electromagnetic charging, vibration power generation, pressing power generation, etc., to provide power for the battery management module 200 .
在一种实现方式中，电池管理***100a还包括数据存储模块(未示出)。数据存储模块可以存储所有的电芯组的状态数据，也可以仅存储异常状态数据和/或第二标识信息。后续维护时，只需从数据存储模块中查找异常状态数据或者第二标识信息即可定位发生异常的电芯组或者获取该电芯组异常的原因，便于后期维护。In an implementation manner, the battery management system 100a further includes a data storage module (not shown). The data storage module can store the state data of all battery packs, or only store the abnormal state data and/or the second identification information. During follow-up maintenance, you only need to find the abnormal state data or the second identification information from the data storage module to locate the abnormal battery pack or obtain the cause of the abnormal battery pack, which is convenient for later maintenance.
在一种实现方式中，数据存储模块可以设置在电池包100内，也可以设置在电动工具或者充电器内。In an implementation manner, the data storage module can be set in the battery pack 100 , and can also be set in an electric tool or a charger.
图2表示本申请的另一实施例的电池管理***300a，包括电池包300和电池管理模块400，其中电池包300包括多组电芯组301、电力端口302、载波通信单元303，其中，电力端口302包括正极输出端口3021和负极输出端口3022。本实施方式相比上一实施方式不同之处在于：不包含数据采集模块和数据传输模块，但包含载波通信单元303。载波通信单元303能采集每组电芯组的状态数据并传输至电池管理模块400。Fig. 2 shows a battery management system 300a according to another embodiment of the present application, including a battery pack 300 and a battery management module 400, wherein the battery pack 300 includes multiple sets of battery packs 301, power ports 302, and carrier communication units 303, wherein the power The ports 302 include a positive output port 3021 and a negative output port 3022 . Compared with the previous embodiment, this embodiment is different in that it does not include a data collection module and a data transmission module, but includes a carrier communication unit 303 . The carrier communication unit 303 can collect the state data of each battery pack and transmit it to the battery management module 400 .
其中，电池管理模块400也可以是设置在电池包300内的BMS模块或者设置在其他电池包内的BMS模块或者设置在电动工具内的控制模块或者设置在 充电器内的控制模块或者是集成了电池管理功能的用户的智能终端。本实施例同样不限定电池管理模块400的类型及位置。在图2所示的电池管理***中，电池管理模块400被配置为以载波通信的方式获取电池包300的状态数据，并据此控制电池包300的使用状态。例如，获取电池包300中电芯组301的输出电压、电流以及温度等状态数据，并根据所监控到的数据控制电池包300的充放电或者电池包300中任一电芯组301的充放电。Wherein, the battery management module 400 may also be a BMS module set in the battery pack 300 or a BMS module set in other battery packs or a control module set in an electric tool or a control module set in a charger or an integrated Smart terminals for users with battery management functions. The present embodiment also does not limit the type and location of the battery management module 400 . In the battery management system shown in FIG. 2 , the battery management module 400 is configured to obtain the status data of the battery pack 300 through carrier communication, and control the usage status of the battery pack 300 accordingly. For example, obtain state data such as the output voltage, current, and temperature of the battery pack 301 in the battery pack 300, and control the charging and discharging of the battery pack 300 or the charging and discharging of any battery pack 301 in the battery pack 300 according to the monitored data .
本实施例中，如图2所示载波通信单元303集成在每个电芯3011上，可以采集所有电芯3011的状态数据，而不是采集一组电芯组301的数据。示例性的，载波通信单元303采集到电芯3011的状态数据后，将状态数据寄载在连续的高频载波上输出至电池管理模块400。同样，电池包300不需要设置通信端口，也不需要设置用于使电芯或者电芯组与通信端口间进行连接的通信电缆。同样达到了降低电池包300内布线复杂度的效果。In this embodiment, as shown in FIG. 2 , the carrier communication unit 303 is integrated on each battery cell 3011 , and can collect state data of all battery cells 3011 instead of collecting data of a group of battery cells 301 . Exemplarily, after the carrier communication unit 303 collects the state data of the battery cell 3011 , it sends the state data to the battery management module 400 on a continuous high-frequency carrier. Likewise, the battery pack 300 does not need to be provided with a communication port, nor does it need to be provided with a communication cable for connecting the battery cell or the battery pack to the communication port. The effect of reducing the wiring complexity in the battery pack 300 is also achieved.
可以理解的是，由于载波通信单元303能采集每个电芯3011的状态数据，从而电池管理模块400可以根据所有电芯3011的状态数据计算电池包300的充电状态(State of Charge，SOC)、功率状态(State Of Power，SOP)、健康状态(State of Health，SOH)等状态信息，且由于原始数据充足也能保证计算所得到电池包的状态信息的精确性。It can be understood that, since the carrier communication unit 303 can collect the state data of each battery cell 3011, the battery management module 400 can calculate the state of charge (State of Charge, SOC) of the battery pack 300 according to the state data of all the battery cells 3011, State of Power (State Of Power, SOP), State of Health (State of Health, SOH) and other state information, and the accuracy of the calculated state information of the battery pack can be guaranteed due to sufficient raw data.
在本实施例中，除了载波通信的方式与上述实施例中的无线通信方式不同外，其他的功能均与上述实施例中的描述一致，此处不再赘述。In this embodiment, except that the carrier communication method is different from the wireless communication method in the above embodiments, other functions are consistent with the descriptions in the above embodiments, and will not be repeated here.
可以理解的是，无论是无线通信还是载波通信，本质上都是不借助通信电缆实现的电池包内数据的输出，减少电池包内的布线。因此，其他能不借助通信电缆实现电池包数据输出的方式也在本申请的保护范围内。It can be understood that whether it is wireless communication or carrier communication, it is essentially the output of data in the battery pack without the use of communication cables, reducing the wiring in the battery pack. Therefore, other ways to output battery pack data without using communication cables are also within the protection scope of the present application.
在一个实施例中，如图3所示，电池包500包括壳体501、电芯组502、电芯503、电力端口504、数据采集模块505、数据传输模块506和电池管理模块507。壳体501可以是可拆卸的密封盒，密封盒上可以具有正极输出端口5041和负极输出端口5042的开口。多个电芯503以串联和/或并联的方式组成电芯 组502。数据采集模块505可以是各种传感器件，如温度传感器、电压传感器、电流传感器。数据传输模块506可以集成在数据采集模块505上，用以无线通信的方式输出电芯或者电芯组的状态数据。电池管理模块507为BMS管理模块，可以位于电池包500内部，也可以位于由电池包500供电的电动工具内或者位于充电器内。可以理解的，BMS模块集成有控制器、处理器、存储器、收发器能各种组件。In one embodiment, as shown in FIG. 3 , the battery pack 500 includes a casing 501 , a cell pack 502 , a cell 503 , a power port 504 , a data acquisition module 505 , a data transmission module 506 and a battery management module 507 . The casing 501 may be a detachable sealed box, and the sealed box may have openings for a positive output port 5041 and a negative output port 5042 . A plurality of batteries 503 form a battery pack 502 in series and/or in parallel. The data acquisition module 505 can be various sensor devices, such as temperature sensors, voltage sensors, and current sensors. The data transmission module 506 can be integrated on the data acquisition module 505 to output the state data of the battery cell or the battery pack in a wireless communication manner. The battery management module 507 is a BMS management module, which can be located in the battery pack 500 , or in an electric tool powered by the battery pack 500 or in a charger. It can be understood that the BMS module is integrated with various components such as a controller, a processor, a memory, and a transceiver.
本实施例所保护的电池包500可应用在上述实施例的电池管理***中。The battery pack 500 protected in this embodiment can be applied in the battery management system of the above embodiments.
在一个实施例中，如图4所示，电池包600包括壳体601、电芯组602、电芯603、电力端口604、载波通信单元605和电池管理模块606，其中电力端口604包括正极输出端口6041和负极输出端口6042。区别于图2所示的电池包300，该电池包600中载波通信单元605是集成在每个电芯603上的载波芯片，可以将电芯的状态数据以载波通信的方式输出。In one embodiment, as shown in FIG. 4 , the battery pack 600 includes a casing 601, a cell pack 602, a cell 603, a power port 604, a carrier communication unit 605, and a battery management module 606, wherein the power port 604 includes a positive output port 6041 and negative output port 6042. Different from the battery pack 300 shown in FIG. 2 , the carrier communication unit 605 in the battery pack 600 is a carrier chip integrated on each battery cell 603 , which can output the status data of the battery cells in the form of carrier communication.
本申请无需借助电缆即可监测到的电池包内电芯组的状态数据输出，减少了电池包内布线的复杂度，便于后期维护，同时也由于电缆的减少而降低了电池包内部的功耗提升了电池包的续航能力。The state data output of the cell group in the battery pack that can be monitored by this application without the use of cables reduces the complexity of wiring in the battery pack and facilitates later maintenance, and also reduces the power consumption inside the battery pack due to the reduction of cables Improved battery life.

Claims (20)

  1. 一种适用于电动工具的电池管理***，包括：A battery management system for power tools comprising:
    至少一个电池包；at least one battery pack;
    所述电池包包括：The battery pack includes:
    至少一组电芯组；at least one battery pack;
    电力端口，用以输出电能以给所述电动工具供电；a power port for outputting electric energy to power the electric tool;
    数据采集模块，与至少一个电芯组连接，设置为采集所连接的电芯组的状态数据；The data acquisition module is connected to at least one battery pack, and is configured to collect state data of the connected battery pack;
    数据传输模块，设置为以无线通信的方式输出所述电芯组的状态数据；The data transmission module is configured to output the state data of the battery pack in a wireless communication mode;
    所述电池管理***还包括：The battery management system also includes:
    电池管理模块，设置为获取所述电芯组的状态数据，并根据所述状态数据管理所述电池包的使用状态；A battery management module, configured to acquire the state data of the battery pack, and manage the use state of the battery pack according to the state data;
    所述电池管理模块设置在所述电池包内部或者所述电动工具内或者外部终端设备内。The battery management module is arranged inside the battery pack or inside the electric tool or inside the external terminal equipment.
  2. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述电池包不包括通信端口。The battery pack does not include a communication port.
  3. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述电池包包括多个数据采集模块，所述多个数据采集模块相互之间基于第一信道传输所采集的电芯组的状态数据。The battery pack includes a plurality of data acquisition modules, and the plurality of data acquisition modules transmit the collected state data of the battery pack to each other based on the first channel.
  4. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    一个电池包的电池管理模块能基于第二信道获取另一个电池包的数据传输模块传输的状态数据。The battery management module of one battery pack can acquire the state data transmitted by the data transmission module of another battery pack based on the second channel.
  5. 根据权利要求4所述的电池管理***，其中，The battery management system according to claim 4, wherein,
    各个电池包内的数据传输模块处于同一区域网内。The data transmission modules in each battery pack are in the same area network.
  6. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述数据传输模块包括射频单元、蓝牙单元、红外单元中的至少一个。The data transmission module includes at least one of a radio frequency unit, a bluetooth unit and an infrared unit.
  7. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述数据采集模块与所述数据传输模块集成在一个处理芯片上；The data acquisition module and the data transmission module are integrated on a processing chip;
    所述处理芯片通过所述电力端口的电缆线输出所述电芯组的状态数据。The processing chip outputs the state data of the battery pack through the cable of the power port.
  8. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述状态数据携带所述电芯组的标识信息。The state data carries identification information of the battery pack.
  9. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述数据传输模块还被设置为输出校验信息至所述电池管理模块。The data transmission module is also configured to output verification information to the battery management module.
  10. 根据权利要求8所述的电池管理***，其中，The battery management system according to claim 8, wherein,
    所述电池管理模块被配置为：The battery management module is configured to:
    以预设频率获取所述电芯组的状态数据；Obtaining the state data of the battery pack at a preset frequency;
    检测所述状态数据中是否包含所有的电芯组的标识信息；Detecting whether the state data includes identification information of all battery packs;
    若预设时间内未检测到第一标识信息，输出控制信号以断开所述第一标识信息对应的第一电池模组与所述电力端口的电连接。If the first identification information is not detected within a preset time, a control signal is output to disconnect the electrical connection between the first battery module corresponding to the first identification information and the power port.
  11. 根据权利要求10所述的电池管理***，其中，The battery management system according to claim 10, wherein,
    所述电池管理模块被配置为：The battery management module is configured to:
    若检测到异常的状态数据，确定异常状态数据对应的电芯组的第二标识信息；If abnormal state data is detected, determine the second identification information of the battery pack corresponding to the abnormal state data;
    输出控制信号以断开所述第二标识信息对应的第二电池模组与所述连接端口的电连接。Outputting a control signal to disconnect the electrical connection between the second battery module corresponding to the second identification information and the connection port.
  12. 根据权利要求11所述的电池管理***，还包括：The battery management system according to claim 11, further comprising:
    数据存储模块，设置为存储所述电芯组的异常状态数据或者所述第二标识信息。The data storage module is configured to store the abnormal state data of the battery pack or the second identification information.
  13. 根据权利要求10所述的电池管理***，其中，The battery management system according to claim 10, wherein,
    所述电池管理模块在预设时间内未检测到所述电芯组的状态数据时，进入低功耗模式。When the battery management module does not detect the state data of the battery pack within a preset time, it enters a low power consumption mode.
  14. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述电池管理模块以无线通信的方式获取所述数据采集模块所采集的所述 状态数据。The battery management module obtains the state data collected by the data collection module through wireless communication.
  15. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述数据传输模块每次输出所述状态数据的数据传输时长小于或等于500ms。The data transmission duration of each output of the status data by the data transmission module is less than or equal to 500ms.
  16. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述电池管理模块的静态电流小于或等于100uA，所述静态电流包括所述电池管理模块处于待机状态下的待机电流或者所述电池管理模块以低于5Hz的频率获取所述状态数据的平均工作电流。The quiescent current of the battery management module is less than or equal to 100uA, and the quiescent current includes the standby current when the battery management module is in the standby state or the average work of the battery management module acquiring the state data at a frequency lower than 5Hz current.
  17. 根据权利要求1所述的电池管理***，其中，The battery management system according to claim 1, wherein,
    所述电池管理模块能从任一个所述电芯组获取电力或者从所述电池包获取电力或者从独立电源模块获取电力，所述独立电源模块包括纽扣电池。The battery management module can obtain power from any one of the battery packs or from the battery pack or from an independent power supply module, and the independent power supply module includes a button battery.
  18. 一种适用于电动工具的电池包，包括：A battery pack suitable for electric tools, comprising:
    壳体；case;
    电芯组，容纳于所述壳体内，设置为向电动工具供电；A battery pack, housed in the casing, configured to supply power to the electric tool;
    电力端口，用以输出所述电芯组的电力；a power port for outputting the power of the battery pack;
    数据采集模块，与至少一个电芯组连接，设置为采集所连接的电芯组的状态数据；The data acquisition module is connected to at least one battery pack, and is configured to collect state data of the connected battery pack;
    数据传输模块，设置为以无线通信的方式输出所述电芯组的状态数据；The data transmission module is configured to output the state data of the battery pack in a wireless communication mode;
    电池管理模块，设置为获取所述电芯组的状态数据，并根据所述状态数据管理所述电池包的使用状态；A battery management module, configured to acquire the state data of the battery pack, and manage the use state of the battery pack according to the state data;
    所述电池管理模块设置在所述壳体内；The battery management module is arranged in the housing;
    所述数据传输模块能以无线通信的方式输出所述状态数据至所述电动工具。The data transmission module can output the state data to the electric tool in a wireless communication manner.
  19. 根据权利要求18所述的电池包，其中，The battery pack according to claim 18, wherein,
    所述电池包的数据传输模块与另一电池包的数据传输模块进行无线通信。The data transmission module of the battery pack performs wireless communication with the data transmission module of another battery pack.
  20. 根据权利要求19所述的电池包，其中，The battery pack according to claim 19, wherein,
    所述电池包的数据传输模块与外部终端进行无线通信。The data transmission module of the battery pack performs wireless communication with an external terminal.
PCT/CN2022/139049 2021-12-27 2022-12-14 Battery management system and battery pack WO2023125012A1 (en)

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WO2018076785A1 (en) * 2016-10-25 2018-05-03 宁德时代新能源科技股份有限公司 Battery management apparatus and system for battery pack
CN110896233A (en) * 2018-09-12 2020-03-20 宁德时代新能源科技股份有限公司 Battery management system
WO2020199237A1 (en) * 2019-04-01 2020-10-08 北斗航天汽车（北京）有限公司 Battery module with wireless communication function and battery pack
CN112327184A (en) * 2020-10-14 2021-02-05 江苏纵帆微电子有限公司 Battery pack data transmission system and transmission method thereof

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CN205564907U (en) * 2016-03-30 2016-09-07 比亚迪股份有限公司 Battery module, battery package and vehicle
WO2018076785A1 (en) * 2016-10-25 2018-05-03 宁德时代新能源科技股份有限公司 Battery management apparatus and system for battery pack
CN110896233A (en) * 2018-09-12 2020-03-20 宁德时代新能源科技股份有限公司 Battery management system
WO2020199237A1 (en) * 2019-04-01 2020-10-08 北斗航天汽车（北京）有限公司 Battery module with wireless communication function and battery pack
CN112327184A (en) * 2020-10-14 2021-02-05 江苏纵帆微电子有限公司 Battery pack data transmission system and transmission method thereof

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