TWI664771B - Li-ion battery module remote calibration system - Google Patents

Abstract

The invention provides a remote calibration system for a lithium-ion battery module, which includes: one or more lithium-ion battery module calibration devices, and one lithium-ion battery module calibration device can correspond to one lithium-ion battery module; one or more The central processing control module is connected to the lithium ion battery module calibration device, and receives / sets data to the lithium ion battery module calibration device; a relay server receives the lithium ion battery module connected to the central processing control module through the network. The data of the calibration device and the corresponding lithium-ion battery module, and can transmit the setting calibration data to the central processing control module; a database system, which is connected to the relay server, and stores the lithium-ion battery module calibration device and the corresponding Data and calibration data for lithium-ion battery modules; a web server, which connects to a database, provides remote client devices on the Internet for monitoring, and can receive control operations from client devices. The invention can improve lithium Use efficiency of ion battery modules, and more accurately grasp the remaining capacity and usage status of battery modules.

Description

Remote calibration system for lithium ion battery module

The invention relates to a system for calibrating a lithium ion battery module through remote monitoring and management.

Facing the advent of the green energy era, the demand for electric vehicles is also increasing. Whether it is electric bicycles, electric vehicles, or electric vehicles, the basic source of electrical energy is provided by electrical energy storage modules, and electrical energy storage In the module, the storage energy density of the lithium ion battery energy storage module is the best. However, the charging rate of the lithium-ion battery module is limited by the chemical reaction rate of the lithium-ion electrochemical reaction, so that the larger the storage capacity of the lithium-ion battery module, the longer the charging time.

In order to improve the use efficiency of the lithium-ion battery module and avoid wasting time in the charging process of the lithium-ion battery module, the business model of the lithium-ion battery module exchange system and charging station system came into being. In order to effectively manage and improve the use efficiency of lithium-ion battery modules on the market, the lithium-ion battery module exchange system and charging system must provide lithium-ion battery module identification and charging for the lithium-ion battery modules that are exchanged and charged. Features.

The lithium-ion battery module includes a lithium-ion battery management system (BMS). The main functions of the lithium-ion battery management system include the ability to overcharge / discharge, over-temperature, and over-current the lithium-ion battery module. In addition to the protection function, it also includes the management of the use of each lithium-ion battery in the lithium-ion battery module, and provides communication with external devices. Communication's communication network interface enables external devices to access voltage, current, remaining power, temperature, and other management information in the lithium-ion battery management system (BMS).

The composition of the lithium ion battery management system (BMS) includes at least a lithium ion battery voltage sensing circuit, a lithium ion battery protection circuit, a BMS power circuit, an A / D conversion circuit, a temperature sensing circuit, an LED display circuit, and a plurality of powers. Transistors, etc .; With the increase of the functions of the lithium-ion battery management system, it can further include: microprocessor modules, external communication network interface modules, display modules, sound modules, human-machine input modules, etc. The detailed functions and structures of the lithium-ion battery management system can be described as well-known technologies in the art.

When the lithium ion battery module is used for a long period of time after charging and discharging, there will be a problem of energy storage efficiency degradation, which is caused by the deterioration of the electrode of the lithium ion battery and the reduction of the electrochemical reaction efficiency. Deterioration of the electrodes of the battery causes an increase in the internal resistance of the battery and also causes a loss of battery capacity.

In addition, the lithium-ion battery module is formed by combining a plurality of lithium-ion battery cells in series and parallel. After the lithium-ion battery module is used for a long period of charge and discharge, the voltage of each lithium-ion battery cell will also be different, and the voltage difference of each lithium-ion battery cell will cause some lithium-ion battery cells to be charged and discharged. The voltage will be too high or too low, which will further cause the loss of battery capacity.

In view of the problems and difficulties associated with the decrease and inaccuracy of the battery capacity caused by the long-term cyclic charging / discharging of the lithium-ion battery module in the prior art, the object of the present invention is to provide a remote management terminal for the lithium-ion battery module. It can remotely calibrate the lithium ion battery module of the lithium ion battery module exchange station and charging station, so as to improve the use efficiency of the lithium ion battery module and more accurately grasp the remaining capacity and use of the battery module status.

Therefore, in order to achieve the above-mentioned object, the technical means adopted by the present invention is directed to a plurality of series-connected and parallel-connected lithium-ion battery modules. Lithium-ion battery modules in the range can be applied to the remote calibration system of the present invention for remote calibration.

Another object of the present invention is to manage the lithium-ion battery modules circulating in the market through remote monitoring without the need to return the lithium-ion battery modules to the factory for maintenance, which can further reduce the labor costs required for maintenance and increase Maintenance execution efficiency.

The invention provides a calibration device for a lithium ion battery module, which at least includes: a calibration module, a power supply unit, a lithium ion battery module identification and certification unit, a micro control unit, a calibration mode setting unit, and a lithium ion Battery module communication unit; the calibration module includes at least: a voltage measurement unit and a temperature measurement unit; the lithium ion battery module communication unit and the calibration module communicate with the external lithium ion battery module through one or more ports Docking; the calibration mode setting unit and the calibration module are connected through a wired circuit, and the calibration mode setting unit controls the calibration module to perform a calibration operation on the external lithium ion battery module; the lithium ion battery module identification and authentication unit and the external lithium ion battery The connection interface of the module includes at least one of wired or wireless connection methods.

In a preferred embodiment, the calibration module further includes: a micro-resistance measurement unit and a certain current load source; the micro-resistance measurement unit and a constant current load source also pass through one or more ports and an external lithium-ion battery The modules are docked; the micro-resistance range measured by the micro-resistance measurement unit is between 10 μΩ and 10 Ω; the constant current load source provides a settable discharge current to an external lithium-ion battery module.

In a preferred embodiment, the calibration mode stored by the calibration mode setting unit is Included: one of voltage-corresponding capacity look-up table method, voltage-capacity linear correspondence estimation method, discharge voltage drop slope-capacity correspondence estimation method.

In a preferred embodiment, the calibration mode is at least for a fixed temperature, a set of temperature interval ranges, multiple sets of temperature interval ranges, a fixed lithium-ion battery module internal resistance, a set of lithium-ion battery module internal resistance interval ranges, One of the ranges of the internal resistance range of multiple groups of lithium ion battery modules for calibration.

In a preferred embodiment, the lithium ion battery module identification and authentication unit or micro-control unit, the connection interface with the external lithium ion battery module, if it is a wired connection interface, it includes at least: UART, SPI-Bus, RS-232 , RS-485, CAN-Bus, I2C-Bus, HDQ-Bus connection interface; if it is a wireless connection interface, it includes at least: RF tag interface (RFID), near field communication interface (NFC), Bluetooth (BT) , Zigbee connection interface.

In a preferred embodiment, the connection interface of the lithium ion battery module calibration device to an external communication network, if it is a wired connection interface, it includes at least: RS-485, CAN-Bus, I2C-Bus, Ethernet (Ethernet ) One of the connection interfaces; if it is a wireless connection interface, it includes at least one of Bluetooth (BT), Zigbee, and WiFi connection interfaces.

The present invention further provides a remote calibration system for a lithium ion battery module, which at least includes: one or more of the foregoing lithium ion battery module calibration devices, and one lithium ion battery module calibration device can correspond to one lithium ion battery module ; One or more central processing control modules, connected to the lithium ion battery module calibration device, receiving / setting data to the lithium ion battery module calibration device; a relay server, receiving the central processing control module connection through the network Lithium-ion battery module calibration device and corresponding lithium-ion battery module data, and can transmit setting calibration data to the central processing control module; a database system, which is connected to a relay server to store the lithium-ion battery module Data of the calibration device and the corresponding lithium-ion battery module and calibration data; a web server, which is connected to the database, provides remote monitoring of client devices on the Internet, and can receive control operations from client devices.

In a preferred embodiment, the relay server, the database system and the web server are independent hardware systems; or any two systems are on the same hardware system; or all systems are on the same hardware system.

In a preferred embodiment, the database system is a SQL database system.

In a preferred embodiment, the web server provides a dynamic web page for the user to operate. The dynamic web page at least includes: the serial number or number information of the remote calibration system of the lithium ion battery module, and the calibration mode of the lithium ion battery module calibration device. Selection information, electrical information of the lithium-ion battery module, and calibration information of the lithium-ion battery module perform one of the selection information.

The invention has the effect of reducing the cost required to perform calibration on a large number of lithium ion battery modules, and effectively improves the efficiency of performing calibration on a large number of lithium ion battery modules.

11‧‧‧ Lithium-ion battery module calibration device

111‧‧‧Micro Control Unit

112‧‧‧ Lithium-ion battery module identification and certification unit

1121‧‧‧Interface

113‧‧‧lithium-ion battery module communication unit

1131‧‧‧Interface

114‧‧‧ Calibration mode setting unit

115‧‧‧calibration module

1151‧‧‧Voltage measurement unit

1152‧‧‧Temperature measuring unit

1153‧‧‧Micro-resistance measurement unit

1154‧‧‧Constant current load source

1155‧‧‧connection circuit

1156‧‧‧connection circuit

1157‧‧‧connection circuit

1158‧‧‧connection circuit

116‧‧‧Power Supply Unit

117‧‧‧Interface

12‧‧‧ lithium ion battery module

121‧‧‧ Li-ion battery module port

122‧‧‧lithium-ion battery cell

13‧‧‧Central Processing Control Module

14‧‧‧Connect Interface

21‧‧‧lithium ion battery module exchange system

211‧‧‧Central Processing Control Module

212‧‧‧lithium-ion battery module socket

2121‧‧‧lithium ion battery module calibration device

213‧‧‧Interface

22‧‧‧lithium-ion battery module

23‧‧‧Connect Interface

31‧‧‧lithium-ion battery module charging station system

311‧‧‧Central Processing Control Module

312‧‧‧lithium-ion battery module charging stand

3121‧‧‧lithium ion battery module calibration device

313‧‧‧Interface

32‧‧‧ Electric vehicles

33‧‧‧lithium-ion battery module

34‧‧‧Connect Interface

41‧‧‧ Lithium-ion battery module remote calibration system

42‧‧‧lithium ion battery module exchange system

43‧‧‧Li-ion battery module charging station system

421, 431‧‧‧central processing control module

422‧‧‧lithium-ion battery module socket

432‧‧‧lithium ion battery module calibration device

44‧‧‧ relay server

45‧‧‧Database system

46‧‧‧Web Server

47‧‧‧Internet

48‧‧‧Connect Interface

49‧‧‧lithium-ion battery module

51, 52, 53, 54, 55‧‧‧ steps

61‧‧‧Remote monitoring and management screen of lithium ion battery module remote calibration system

FIG. 1 is a structural diagram of a lithium ion battery module calibration device of the present invention.

FIG. 2 is a schematic diagram of a lithium ion battery module exchange system of the present invention.

FIG. 3 is a schematic diagram of a lithium-ion battery module charging station system of the present invention.

FIG. 4 is a structural diagram of the remote calibration system of the lithium ion battery module of the present invention.

Figures 5 (A) -5 (F) are graphs and flowcharts of the calibration mode of the remote calibration system of the lithium-ion battery module of the present invention (taking a 16-series lithium-ion battery cell as an example).

Figure 6 shows the remote web monitoring and management of the remote calibration system of the lithium ion battery module of the present invention. Screen diagram.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making advancements fall within the protection scope of the present invention.

Figure 1 shows an embodiment of a lithium-ion battery module calibration device 11 according to the present invention, which includes: a micro-control unit 111, a lithium-ion battery module identification and certification unit 112, a lithium-ion battery module communication unit 113, and calibration. Mode setting unit 114, calibration module 115, power supply unit 116; calibration module 115 further includes: voltage measurement unit 1151, temperature measurement unit 1152, micro-resistance measurement unit 1153, constant current load source 1154, and lithium-ion battery The module calibration device 111 is connected to the lithium-ion battery module 12 through the port 121, and the lithium-ion battery module 12 is composed of a plurality of lithium-ion battery cells 122 to increase the battery module voltage in series and increase the battery in parallel. Consisting of module capacity.

The communication connection interface 1121 between the lithium-ion battery module identification and authentication unit 112 and the lithium-ion battery module 12 can be a wired connection interface, such as: UART, SPI-Bus, RS-232, RS-485, CAN- In addition to at least one of the interfaces such as Bus, I2C-Bus, HDQ-Bus, etc., it can also be a wireless connection interface, such as: RF tag interface (RFID), near field communication interface (NFC), Bluetooth (BT ), Zigbee ... and at least one of the wireless interfaces.

The micro control unit 111 may be one of 8-bit, 16-bit, or 32-bit microcontrollers. The firmware design of the microcontroller may include an operating system (OS) or a simple one without an operating system. Firmware programming. In addition, the microcontroller also provides a variety of peripheral modules, such as: A / D conversion circuit, Timer circuit, D / A conversion circuit, UART communication circuit, programmable input / output circuit (GPIO), real-time clock circuit (RTC), non-volatile memory ... and other modules.

The communication connection interface 1131 of the lithium-ion battery module communication unit 113 and the lithium-ion battery module 12 is a wired connection interface, such as: UART, SPI-Bus, RS-232, RS-485, CAN-Bus, I2C- At least one of the interfaces such as Bus, HDQ-Bus, etc., in which the lithium-ion battery module communication unit 113 and the connection interface 1131 with the lithium-ion battery module 12 can also identify and authenticate the lithium-ion battery module 112 The communication connection interface 1121 shared with the lithium-ion battery module 12 is the same communication connection interface, that is, the lithium-ion battery module communication unit 113 and the lithium-ion battery module identification and authentication unit 112 use the same communication for the lithium-ion battery module 12 Connection interface.

In addition, the micro-control unit 111 accesses the management information of the lithium-ion battery module lithium-ion battery management system (BMS) of the lithium-ion battery module 12, in addition to voltage, current, remaining power, temperature, etc., Also includes: BMS hardware / firmware version, number of charge / discharge cycles, battery module serial number, battery module manufacturing date, battery module manufacturer, battery cell type, number of battery cell series, battery cell parallel number, battery Module error status information can be accessed through the communication unit interface of the lithium-ion battery module 12.

In addition to the hardware logic chip components, the calibration mode setting unit 114 can also implement various calibration modes through software and firmware programming with the same functions in the micro control unit 111, and then perform settings and perform calibration. action.

The connection interface 117 between the calibration mode setting unit 114 and the calibration module 115 is connected through a wired circuit. The calibration mode setting unit 114 uses the A / D conversion circuit around the micro control unit 111 to measure the calibration module 115. Measured voltage, temperature, micro-resistance signal values Line conversion; and set the constant current value for the constant current load source through the D / A conversion circuit and GPIO circuit around the micro control unit 111. Then, the micro control unit 111 accesses the lithium ion battery module lithium ion battery management system (BMS) of the lithium ion battery module 12 through the lithium ion battery module communication unit 113, and completes the lithium according to the set calibration mode. Calibration operation of the ion battery module 12.

The calibration module 115 calibrates the lithium-ion battery module 12 according to the calibration mode flow steps set by the calibration mode setting unit 114. Through the connection port 121 of the lithium-ion battery module 12, each unit of the calibration module 115 performs lithium calibration. The ion battery module 12 has independent connection circuits 1155-1158, which respectively measure and perform signal values required for calibration.

The lithium ion battery module calibration device 11 performs a data transfer communication operation with the central processing control module 13 through the communication connection interface 14.

Figure 2 shows an embodiment of a lithium-ion battery module switching system 21 of the present invention, which includes a central processing control module 211, one or more lithium-ion battery module sockets 212, and each lithium-ion battery module The group socket 212 includes a lithium-ion battery module calibration device 2121, and each lithium-ion battery module socket 212 can be connected to a lithium-ion battery module 22.

The central processing control module 211 simultaneously communicates with a plurality of lithium ion battery module calibration devices 2121. The communication connection network structure is a one-to-many device connection communication method. On the communication connection interface 213, it can be wired. Connection interface, such as: at least one of RS-485, CAN-Bus, I2C-Bus, Ethernet, etc., it can also be a wireless connection interface, such as: Bluetooth (BT ), Zigbee, WiFi, etc. at least one of the wireless interfaces.

The central processing control module 211 includes a 32-bit microcontroller. The device architecture can be either the RISC instruction set architecture or the CISC instruction set architecture. The microcontroller's firmware design can include an operating system (OS) or simple firmware programming without an operating system. It is responsible for interacting with each lithium-ion battery module. The micro control unit in the calibration device 2121 communicates and collects and sets data and parameters of the lithium ion battery module calibration device 2121.

On the implementation of the wireless communication connection interface between the central processing control module 211 and the lithium-ion battery module calibration device 2121, one embodiment of the present invention is to implement an WiFi wireless network interface with an ESP8266-WiFi module, one of which is ESP8266. -The WiFi module is connected to the microcontroller in the central processing control module 211 through the UART interface, and the other ESP8266-WiFi module is also connected to the microcontroller in the lithium ion battery module calibration device 2121 through the UART interface. Connection; the operation and wireless data transmission of these two ESP8266-WiFi modules are controlled by the micro-control unit in the central processing control module 211 and the lithium-ion battery module calibration device 2121 through AT commands.

In addition, the WiFi wireless communication connection interface of the central processing control module 211 can also be implemented through a common WiFi IP sharer. The central processing control module 211 is connected to the IP sharer as a network node through a wired connection with other wireless connections. Communicate with the lithium ion battery module calibration device 2121 of the IP sharer.

On the implementation of the wireless communication connection interface between the central processing control module 211 and the lithium-ion battery module calibration device 2121, another embodiment of the present invention is to implement Bluetooth (BT) using the FBT06-Bluetooth (BT) module. Wireless network interface. One of the FBT06-Bluetooth (BT) modules is connected to the microcontroller in the central processing control module 211 through the UART interface, and the other FBT06-Bluetooth (BT) module is also connected. Connected to the micro control unit in the lithium ion battery module calibration device 2121 through the UART interface; the operation and wireless data transmission of the two FBT06-Bluetooth (BT) modules are controlled by the central processing control module 211 and the lithium ion battery The micro control unit in the module calibration device 2121 passes the AT finger Order to control.

On the implementation of the wired communication connection interface between the central processing control module 211 and the lithium-ion battery module calibration device 2121, another embodiment of the present invention uses an ENC28J60 module to implement an Ethernet wired network interface. The microcontroller in the central processing control module 211 uses an SPI interface to connect to one ENC28J60 module, and the microcontroller in the lithium ion battery module calibration device 2121 also uses the SPI interface to connect to another ENC28J60 module. Each lithium-ion battery module calibration device 2121 has a set of ENC28J60 modules. The central processing control module 211 and all lithium-ion battery module calibration devices 2121 use the Ethernet architecture to connect to a hub or router. Network communication in the IP sharer.

The central processing control module 211 performs a data transfer communication operation with the outside through the wireless communication connection interface 23.

FIG. 3 shows an embodiment of a lithium-ion battery module charging station system 31 according to the present invention, which includes: a central processing control module 311, one or more lithium-ion battery module charging bases 312, each lithium ion The battery module charging base 312 includes a lithium ion battery module calibration device 3121, and each lithium ion battery module charging base 312 can be docked with a lithium ion battery module 33 disposed on the electric vehicle 32.

The central processing control module 311 simultaneously communicates with a plurality of lithium-ion battery module calibration devices 3121. The communication connection network structure is a one-to-many device connection communication method. The communication connection interface 313 can be wired except Connection interface, such as: at least one of RS-485, CAN-Bus, I2C-Bus, Ethernet, etc., it can also be a wireless connection interface, such as: Bluetooth (BT ), Zigbee, WiFi, etc. at least one of the wireless interfaces.

The central processing control module 311 includes a 32-bit microcontroller. The microcontroller architecture can be a RISC instruction set architecture or a CISC instruction set architecture. The firmware design of the microcontroller can include an operating system (OS) or The simple firmware programming without operating system is responsible for communicating with the micro-control unit in each lithium ion battery module calibration device 3121 to collect and set the data and parameters of the lithium ion battery module calibration device 3121.

In the implementation of the wireless communication connection interface between the central processing control module 311 and the lithium-ion battery module calibration device 3121, one embodiment of the present invention is to implement a WiFi wireless network interface using an ESP8266-WiFi module, of which a group of ESP8266 -The WiFi module is connected to the microcontroller in the central processing control module 311 through the UART interface, and the other ESP8266-WiFi module is also connected to the microcontroller in the lithium ion battery module calibration device 3121 through the UART interface. Connection; the operation and wireless data transmission of these two ESP8266-WiFi modules are controlled by the micro-control unit in the central processing control module 311 and the lithium-ion battery module calibration device 3121 through AT commands.

In addition, the WiFi wireless communication connection interface of the central processing control module 311 can also be implemented through a common WiFi IP sharer. The central processing control module 311 is connected to the IP sharer as a network node through a wire, and is connected to other wireless Communicate with the lithium ion battery module calibration device 3121 of the IP sharer.

On the implementation of the wireless communication connection interface between the central processing control module 311 and the lithium-ion battery module calibration device 3121, another embodiment of the present invention is to implement Bluetooth (BT) using the FBT06-Bluetooth (BT) module. Wireless network interface. One set of FBT06-Bluetooth (BT) modules is connected to the microcontroller in the central processing control module 311 through the UART interface, and the other set of FBT06-Bluetooth (BT) modules is also Connected with the micro control unit in the lithium ion battery module calibration device 3121 through the UART interface; the operation and wireless data transmission of these two sets of FBT06-Bluetooth (BT) modules are from the central office The micro control unit in the physical control module 311 and the lithium ion battery module calibration device 3121 is controlled by the AT command.

On the implementation of the wired communication connection interface between the central processing control module 311 and the lithium ion battery module calibration device 3121, another embodiment of the present invention uses an ENC28J60 module to implement an Ethernet wired network interface. The microcontroller in the central processing control module 311 uses an SPI interface to connect to one ENC28J60 module, and the microcontroller in the lithium ion battery module calibration device 3121 also uses the SPI interface to connect to another ENC28J60 module. Each lithium-ion battery module calibration device 3121 has a set of ENC28J60 modules. The central processing control module 311 and all lithium-ion battery module calibration devices 3121 are connected to a hub or router using the Ethernet architecture. Network communication in the IP sharer.

The central processing control module 311 performs a data transfer communication operation with the outside through the wireless communication connection interface 34.

Figure 4 shows an embodiment of a remote calibration system 41 for a lithium-ion battery module according to the present invention, which includes: one or more lithium-ion battery module exchange systems 42, a lithium-ion battery module charging station system 43, Relay server 44, database system 45, web server 46, Internet 47; lithium-ion battery module exchange system 42 and lithium-ion battery module charging station system 43 all include the aforementioned central processing control The module 421 and the aforementioned lithium-ion battery module calibration device, and the lithium-ion battery module exchange system 42 further includes the aforementioned lithium-ion battery module socket 422 docked with the lithium-ion battery module 49.

The relay server 44 simultaneously communicates with a plurality of central processing control modules 421 and 431. Its communication connection network structure is a one-to-many device connection communication method, and a long-distance communication is achieved on the communication connection interface 48. Purpose, mainly based on wireless connection interface, such as: GPRS, 3G, 4G, 5G, WiFi, etc., and the role of the relay server is with the central processing control modules 421 in the lithium-ion battery module exchange system 42 or the lithium-ion battery module charging station system 43, 431 performs data transmission, collects real-time data and status of each lithium-ion battery module exchange system 42 or lithium-ion battery module charging station system 43 in real time, and sets control parameters to each lithium-ion battery module exchange system 42 or The lithium-ion battery module charging station system 43 allows each lithium-ion battery module exchange system 42 or the lithium-ion battery module charging station system 43 to execute a lithium-ion battery module calibration instruction of a control person.

The realization of the relay server 44 can be accomplished by using a PC or a PC server. By designing a program on the PC or a PC server, the aforementioned real-time data and status are collected and control parameters are set. The programming of the PC or the PC server can include the application design of Windows and Linux.

In the implementation of the wireless communication connection interface between the central processing control module and the relay server, one embodiment of the present invention is to implement a WiFi wireless network interface with an ESP8266-WiFi module, one of which is an ESP8266-WiFi module. It is connected to the microcontroller in the central processing control modules 421 and 431 through the UART interface, and another set of ESP8266-WiFi modules is also connected to the relay server 44 through the UART interface. The relay server 44 and ESP8266 -The connection interface of the WiFi module is a USB to UART interface adapter; the operation and wireless data transmission of these two ESP8266-WiFi modules are controlled by the microcontroller and relay server of the central processing control modules 421 and 431 44 Controlled by AT command.

In addition, the WiFi wireless communication connection interface of the relay server 44 can also be realized through an IP sharer of general WiFi. The relay server 44 is connected to the IP sharer as a network node through a wired network, and is connected to other wireless networks. Communicate with the central processing control modules 421 and 431 of the IP sharer.

On the implementation of the wireless communication connection interface between the central processing control modules 421, 431 and the relay server 44, another embodiment of the present invention uses a GPRS-A6-module to implement GPRS, GSM, 3G, 4G wireless networks Road interface, one group of GPRS-A6- module is connected to the microcontroller in the central processing control modules 421 and 431 through the UART interface, and the other group of GPRS-A6- modules is also connected to the relay through the UART interface The server 44 is connected, wherein the connection interface between the relay server 44 and the GPRS-A6-module is a USB to UART interface adapter; the operation and wireless data transmission of these two sets of GPRS-A6-modules are from the central The microcontroller and the relay server 44 of the processing control modules 421 and 431 perform control through AT commands.

Database system 45. An embodiment of the present invention is an SQL database system built on a PC or a PC server, such as MySQL, MS-SQL, etc. The SQL database planning and design includes at least: (1) each Lithium-ion battery module exchange system 42, lithium-ion battery module charging station system 43, central processing control modules 421 and 431, and status information part of the lithium-ion battery module calibration device (including the status of the connected lithium-ion battery module Information), each lithium-ion battery module exchange system 42, (2) the lithium-ion battery module calibration device parameter setting of the lithium-ion battery module charging station system 43, and the calibration control part.

Web server 46, an embodiment of the present invention is a web server on a pc or pc server, which provides a dynamic web page, such as: ASP.NET, JSP, etc., or a static web page such as: HTML + PHP + JavaScript ... etc. to design and present web pages, access the status information of each lithium-ion battery module exchange system 42 and lithium-ion battery module charging station system 43 in the aforementioned database system 45, and can be operated through the web page The control state and parameter settings in the aforementioned database system 45 are updated to achieve remote control and set the lithium ion battery module calibration device of each lithium ion battery module exchange system 42 and lithium ion battery module charging station system 43.

The relay server 44, database system 45, and web server 46 can be built on separate server hardware systems; any two systems can also be built on the same server hardware system; or All systems are built on the same server hardware system.

Figures 5A-5E show an example of the calibration mode of the calibration mode setting unit in the lithium ion battery module calibration device of the present invention (taking a 16-series lithium-ion battery cell as an example).

The calibration mode setting unit sets the calibration mode performed by the lithium-ion battery module. The executed calibration mode can be roughly divided into: a table lookup method, a corresponding estimation method, etc .; and the implementation of the table lookup method may include at least : Cycle times-temperature-voltage-corresponding capacity look-up table method, temperature-internal resistance-voltage-corresponding capacity look-up table method, etc., the implementation of the corresponding estimation method may include at least: temperature-voltage-capacity linear correspondence estimation Method, internal resistance-voltage-capacity linear correspondence estimation method, discharge voltage drop slope-capacity correspondence estimation method, etc.

The implementation of the calibration mode is the cooperation of the calibration mode setting unit and the lithium-ion battery management system (BMS). The calibration mode setting unit provides the calibration reference signals external to the lithium-ion battery module, and the calibration mode setting unit The output signal of the lithium-ion battery module is externally measured, and then compared with the measured signal inside the lithium-ion battery management system (BMS) to calibrate and correct the internal signal value of the lithium-ion battery management system (BMS).

The calibration mode of the present invention: the cycle number-temperature-voltage-corresponding capacity look-up table method (FIG. 5A) is described in the embodiment. The micro control unit in the lithium ion battery module calibration device judges whether the calibration mode set in the calibration mode setting unit is "cycle number-temperature-voltage-corresponding capacity look-up table method". If the calibration mode is correct, then read the docking lithium Information on the current number of charge / discharge cycles of the lithium ion battery module in the ion battery management system (BMS), the instantaneous temperature of the lithium ion battery module, the instantaneous voltage of the lithium ion battery module, and the remaining instantaneous capacity of the lithium ion battery module, and then calibrate The mode setting unit sets the calibration mode of the calibration module. The voltage measurement unit and temperature measurement unit are used to measure the external temperature and voltage of the lithium-ion battery module. If the error exceeds the allowable range, first calibrate the real-time temperature and real-time voltage readings of the lithium-ion battery management system (BMS); then rely on the "cycles-temperature-voltage-corresponding capacity" table in the micro-control unit and the aforementioned After checking the information in the table (as shown in FIG. 5A), the corresponding corresponding capacity is set into the remaining real-time capacity of the lithium ion battery management system (BMS) lithium ion battery module.

The calibration mode of the present invention: temperature-internal resistance-voltage-corresponding capacity look-up table method (FIG. 5B) is described in the embodiment. The micro control unit in the lithium ion battery module calibration device determines whether the calibration mode set in the calibration mode setting unit is "temperature-internal resistance-voltage-corresponding capacity lookup table method". If the calibration mode is correct, then read the docking lithium Information about the real-time temperature of the lithium-ion battery module, the real-time voltage of the lithium-ion battery module, and the remaining real-time capacity of the lithium-ion battery module in the ion battery management system (BMS). Then, the calibration mode setting unit sets the calibration mode of the calibration module. The voltage measurement unit and temperature measurement unit measure the external temperature and voltage of the lithium-ion battery module. Compared with the real-time temperature and instant voltage of the lithium-ion battery module, if the error exceeds the allowable range, first calibrate the lithium ion. Battery management system (BMS) real-time temperature and real-time voltage readings; and the micro-resistance measurement unit of the calibration module to measure the internal resistance of the lithium-ion battery module; and then rely on the "temperature-internal "Resistance-Voltage-Corresponding Capacity" table and the aforementioned information lookup table (as shown in Figure 5B), set the corresponding corresponding capacity into the lithium-ion battery management system (BMS) lithium ion battery module instant capacity remaining.

The calibration mode of the present invention: the description of the embodiment of the temperature-voltage-capacity linear correspondence estimation method (FIG. 5C). Microcontrol unit in the lithium ion battery module calibration device determines the calibration mode setting Whether the calibration mode set in the unit is the "temperature-voltage-capacity linear correspondence estimation method". If the calibration mode is correct, then read the real-time temperature and lithium of the lithium-ion battery module in the connected lithium-ion battery management system (BMS). Information about the real-time voltage of the ion battery module and the remaining real-time capacity of the lithium-ion battery module, and then the calibration mode setting unit sets the calibration mode of the calibration module. The voltage measurement unit and the temperature measurement unit are used to measure the external temperature of the lithium-ion battery module. , Voltage, compared with the real-time temperature and real-time voltage of the lithium-ion battery module read, if the error exceeds the allowable range, first calibrate the real-time temperature and real-time voltage reading of the lithium-ion battery management system (BMS); then rely on Linear curve equations of voltage and capacity in different temperature sections of the micro-control unit (as shown in Figure 5C) and the aforementioned information. After performing a linear calculation of the capacity of the lithium-ion battery module, set the voltage corresponding capacity of the calculation result to the lithium ion Battery Management System (BMS) Li-Ion Battery Module Remaining Instant Capacity.

The calibration mode of the present invention: an embodiment of the internal resistance-voltage-capacity linear correspondence estimation method (FIG. 5D) is described. The micro control unit in the lithium ion battery module calibration device determines whether the calibration mode set in the calibration mode setting unit is the "internal resistance-voltage-capacity linear correspondence estimation method". If the calibration mode is correct, then read the connected lithium-ion battery Information about the real-time temperature of the lithium-ion battery module, the real-time voltage of the lithium-ion battery module, and the remaining real-time capacity of the lithium-ion battery module in the management system (BMS), and then the calibration mode setting unit sets the calibration mode of the calibration module. The measuring unit and temperature measuring unit measure the external temperature and voltage of the lithium-ion battery module. Compared with the real-time temperature and real-time voltage of the lithium-ion battery module, if the error exceeds the allowable range, first calibrate the lithium-ion battery management. System (BMS) real-time temperature and real-time voltage readings; and use the micro-resistance measurement unit of the calibration module to measure the internal resistance of the lithium-ion battery module; and then depend on the temperature and different lithium-ion batteries in the micro-control unit Module internal resistance value interval, linear curve of voltage and capacity Equation (as shown in Figure 5D) and the foregoing information. After performing a linear calculation of the capacity of the lithium-ion battery module, set the voltage corresponding capacity of the calculation result to the remaining real-time capacity of the lithium-ion battery module in the lithium-ion battery management system (BMS). .

The calibration mode of the present invention: the embodiment of the discharge voltage drop slope-capacity correspondence estimation method (FIGS. 5E-5F) is explained. The micro control unit in the lithium ion battery module calibration device determines whether the calibration mode set in the calibration mode setting unit is the "discharge voltage drop slope-capacity correspondence estimation method". If the calibration mode is correct, then read the docking lithium ion battery management Information about the real-time temperature of the lithium-ion battery module, the real-time voltage of the lithium-ion battery module, and the remaining real-time capacity of the lithium-ion battery module in the system (BMS), and then the calibration mode setting unit sets the calibration mode of the calibration module, and measures with voltage Unit and temperature measurement unit, measure the external temperature and voltage of the lithium-ion battery module. Compare with the real-time temperature and voltage of the lithium-ion battery module. If the error exceeds the allowable range, first calibrate the lithium-ion battery management system. (BMS) real-time temperature and real-time voltage readings; then use the constant current load source unit of the calibration module to provide a fixed load current to read the real-time coulomb of the lithium-ion battery module in the connected lithium-ion battery management system (BMS) The reading of the counting current is compared with the constant load current value provided by the constant current load source unit of the calibration module. If the difference exceeds the allowable range, the current Coulomb counter current reading of the lithium ion battery management system (BMS) is calibrated first; and the external voltage of the lithium ion battery module is measured with a voltage measurement unit, and a lithium ion battery is measured within a time interval The voltage drop curve of the module is calculated by the microcontroller. The slope of the voltage drop curve is calculated by the micro control unit. It depends on the constant temperature, constant load current, and slope of the voltage drop curve of the different lithium-ion battery modules in the micro control unit. The linear curve equation (as shown in Figure 5E) and the foregoing information, after performing a linear calculation of the capacity of the lithium-ion battery module, set the voltage corresponding capacity of the calculated result to the remaining lithium-ion battery module of the lithium-ion battery management system (BMS). immediate capacity.

Figure 5F illustrates the implementation steps of the discharge voltage drop slope-capacity estimation method; step 51: start the real-time coulomb counter current reading calibration of the lithium-ion battery module; step 52: connect the calibration module and the lithium-ion battery module, and use The constant current load source unit of the calibration module provides a fixed load current to discharge the lithium-ion battery module. Step 53: Read the Lithium-ion battery module in the docked lithium-ion battery management system (BMS). The value is compared with the constant load current value provided by the constant current load source unit of the calibration module, and is used to calibrate the real-time coulomb counter current reading of the lithium ion battery module. Step 54: Measure the lithium ion battery mode with the voltage measurement unit. The external voltage of the group is measured in a time interval to obtain a voltage drop curve of the lithium-ion battery module, and then the micro-control unit calculates the slope value of the voltage drop curve; Step 55: Depends on the constant temperature, constant load current, Different slope curves of voltage drop curves, voltage and capacity linear curve equations and measured information for different lithium-ion battery modules. After calculation of the linear row of the module capacity lithium ion battery, the capacity corresponding to the calculated voltage set results into a lithium ion battery management system (BMS) module lithium ion battery residual capacity instantly.

Figure 6 shows an embodiment 61 of the remote monitoring management screen of the lithium ion battery module remote calibration system of the present invention, which includes at least: map information, remote monitoring site system information, and the remote end of the lithium ion battery module Serial number or number information of the calibration system, selection information of the calibration mode of the lithium ion battery module calibration device, electrical information of the lithium ion battery module, one of the selection information of the calibration operation execution of the lithium ion battery module, etc.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

Claims (10)

A lithium ion battery module calibration device includes at least: a calibration module, a power supply unit, a lithium ion battery module identification and certification unit, a micro control unit, a calibration mode setting unit, and a lithium ion battery module communication Unit; wherein the calibration module includes at least a voltage measurement unit and a temperature measurement unit; wherein the above-mentioned lithium-ion battery module communication unit and the calibration module communicate with the external lithium-ion battery through one or more ports. The module performs docking; wherein the calibration mode setting unit and the calibration module are connected through a wired circuit, and the calibration mode setting unit controls the calibration module to perform a calibration operation on the external lithium ion battery module; wherein the lithium The connection interface between the ion battery module identification and authentication unit and the external lithium ion battery module includes at least one of wired or wireless connection methods; wherein the micro control unit sets the calibration result data back to the external lithium ion battery module. The calibration device for a lithium ion battery module according to claim 1, wherein the calibration module further includes: a micro-resistance measurement unit and a certain current load source; wherein the micro-resistance measurement unit and the constant current load source, It is also connected to the external lithium-ion battery module through the one or more ports. The micro-resistance range measured by the micro-resistance measurement unit is between 10 μΩ and 10 Ω. Among them, the constant current load source provides A settable fixed value discharge current to the external lithium-ion battery module. The lithium ion battery module calibration device according to claim 1 or 2, wherein the calibration mode stored in the calibration mode setting unit at least includes: a voltage-corresponding capacity look-up table method, a voltage-capacity linear correspondence estimation method, and a discharge voltage drop slope -One of the capacity correspondence estimation methods. The calibration device for a lithium-ion battery module according to claim 3, wherein the calibration mode is at least for a fixed temperature, a group of temperature ranges, a plurality of temperature ranges, a fixed lithium-ion battery module internal resistance, and a group of lithium Calibrate the internal resistance range of the ion battery module or one of the internal resistance ranges of multiple sets of lithium ion battery modules. The lithium-ion battery module calibration device according to claim 1 or 2, wherein the above-mentioned connection interface of the above-mentioned lithium-ion battery module identification and authentication unit or the above-mentioned micro-control unit and the external lithium-ion battery module are wired connections The interface includes at least: UART, SPI-Bus, RS-232, RS-485, CAN-Bus, I2C-Bus, HDQ-Bus connection interface; if it is a wireless connection interface, it includes at least: RF tag interface (RFID) , Near Field Communication Interface (NFC), Bluetooth (BT), Zigbee connection interface. The lithium-ion battery module calibration device according to claim 1 or 2, wherein the above-mentioned lithium-ion battery module calibration device is connected to an external communication network interface. If it is a wired connection interface, it includes at least: RS-485, CAN- One of bus, I2C-Bus, and Ethernet connection interfaces; if it is a wireless connection interface, it includes at least one of Bluetooth (BT), Zigbee, and WiFi connection interfaces. A remote calibration system for a lithium-ion battery module includes at least: one or more lithium-ion battery module calibration devices according to claims 1 to 5, and the above-mentioned lithium-ion battery module calibration device can correspond to one lithium ion Battery module; one or more central processing control modules, connected to the above-mentioned lithium-ion battery module calibration device, receiving / setting data to the above-mentioned lithium-ion battery module calibration device; a relay server, receiving the central through the network Process the data of the above-mentioned lithium-ion battery module calibration device connected to the control module and the corresponding data of the above-mentioned lithium-ion battery module, and can transmit the setting calibration data to the above-mentioned central processing control module; a database system connected to the above-mentioned relay A server storing the above-mentioned lithium-ion battery module calibration device, the corresponding data of the above-mentioned lithium-ion battery module, and the above-mentioned calibration data; a web server connected to the above-mentioned database and providing a remote client on the Internet The device monitors and can receive control operations from the client device. The remote calibration system for a lithium-ion battery module according to claim 7, wherein the relay server, the database system, and the web server are independent hardware systems; or any two of the above systems are on the same hardware System; or all of the above systems are on the same hardware system. The remote calibration system for a lithium-ion battery module according to claim 7 or 8, wherein the database system is a SQL database system. The remote calibration system for a lithium-ion battery module according to claim 7 or 8, wherein the web server provides a dynamic webpage for the user to operate, and the dynamic webpage includes at least the serial number of the remote calibration system for the lithium-ion battery module. Or one of the number information, the selection information of the calibration mode of the above-mentioned lithium-ion battery module calibration device, the electrical information of the above-mentioned lithium-ion battery module, and the above-mentioned selection information of the calibration operation execution of the above-mentioned lithium-ion battery module.