T-BOX for vehicle-mounted power battery system, battery system and electric vehicle

Abstract

The utility model discloses a T-BOX for a vehicle-mounted power battery system, a battery system and an electric automobile. The T-BOX comprises an MCU module, a CAN communication module, a security encryption module, a storage module and a wireless communication module with a positioning function, wherein the CAN communication module, the security encryption module and the storage module are electrically connected with the MCU module in a bidirectional mode. According to the utility model, the security encryption module is added to increase the security of data transmission between the T-BOX and the battery enterprise monitoring platform; the number of transmitted battery system state information is increased through the CAN bus connected with the BMS; by using the integrated wireless communication module in which the GSM module and the GPS module are integrated, an external independent GPS module is omitted, the product size is reduced, and the product cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted terminals, in particular to a T-BOX used for a vehicle-mounted power battery system, a battery system and an electric vehicle. Background Art

[0002] As the core component of electric vehicles, the power battery system needs to understand its status information in real time and ensure its information security. T-BOX (Telematics Box, on-board communication terminal) is an important link and core component of data transmission between the on-board power battery system and the big data monitoring platform. It is used to receive the power battery system information of electric vehicles, receive the information of the big data monitoring platform, provide positioning, data communication transmission, and upgrade the power battery management system BMS.

[0003] CN201910651985 7 discloses a vehicle-mounted T-BOX, the input end of the power module of which is a car battery, and the output end is provided to a CPU module, such as Figure 1 Although this solution uses the CAN communication module to detect the sleep instructions in the vehicle CAN bus through the CPU module and control the working mode of other modules to reduce power consumption, the CPU module still has sleep power consumption and will still consume battery power during the vehicle sleep period; secondly, this solution separates the GPS and GSM modules, which increases the chip cost, increases the PCB layout area, and increases the product size; and, the CAN communication is connected to the vehicle body CAN bus, which contains very little information about the battery system, making it inconvenient for battery companies to understand the battery system status and predict future status in a timely and detailed manner; at the same time, this solution cannot guarantee information security, especially when transmitting key data and program upgrade firmware through T-BOX, it cannot prevent malicious human attacks and ensure vehicle and personal safety.

[0004] The commonly used T-BOXs on the market are all T-BOXs developed for complete vehicles, which are used to receive relevant information in the CAN bus of the complete vehicle. The CAN information of the complete vehicle contains more information about the status of the complete vehicle. For the battery system, there are only some extreme value information, fault alarm and other rough status information, but no detailed relevant information of the battery system, such as the voltage value, temperature value, module status in the system, detailed alarm fault and other parameters of each cell. In addition, battery companies cannot directly receive the status parameters of the battery system in real time. Often, after a fault or accident occurs, the complete vehicle forwards the data to the battery company, which is not convenient for problem analysis and after-sales service personnel to understand the situation in time. At the same time, it is impossible to perform intelligent analysis of existing data and predict faults and risks in advance. Utility Model Content

[0005] The purpose of the utility model is to provide a T-BOX, a battery system and an electric vehicle for a vehicle-mounted power battery system in view of the technical defects existing in the prior art.

[0006] One aspect of the utility model provides a T-BOX for a vehicle-mounted power battery system, comprising an MCU module and a CAN communication module, a security encryption module, a storage module, and a wireless communication module with a positioning function that are bidirectionally electrically connected to the MCU module; the communication module is used for bidirectionally communicating with a power battery monitoring platform, sending information to the power battery monitoring platform and receiving information from the power battery monitoring platform, and is also used for positioning the power battery system; the CAN communication module is used for connecting to a CAN bus of a vehicle-mounted battery management system BMS, receiving CAN signals from the vehicle-mounted battery management system BMS and sending signals from the vehicle-mounted CAN bus to the battery management system BMS; the security encryption module is used for encrypting or decrypting data transmitted from the MCU module and then returning it to the MCU module; the storage module is used for storing data transmitted from the MCU module when writing data and transmitting the stored data to the MCU module when reading data.

[0007] Wherein, the wireless communication module adopts an integrated communication module of GPS and GSM two-in-one.

[0008] It also includes a power module for providing working power to the T-BOX.

[0009] The input end of the power module is connected to a power output end of the vehicle-mounted battery management system BMS, and is powered by the vehicle-mounted battery management system BMS, so that the T-BOX and the vehicle-mounted battery management system BMS can work simultaneously.

[0010] Among them, the power supply module includes a first voltage conversion unit, a second voltage conversion unit, and a third voltage conversion unit. The first voltage conversion unit is used to convert the input voltage into a 5V voltage for supplying to the CAN communication module, and output it to the second voltage conversion unit and the third voltage conversion unit as input voltage. The second voltage conversion unit is used to convert the 5V voltage into 3.3V for supplying to the security encryption module, MCU module, and storage module. The third voltage conversion unit is used to convert the 5V voltage into a 3.8V voltage for supplying to the wireless communication module.

[0011] The RTC timing module built into the MCU chip of the MCU module is used to provide working time for the T-box.

[0012] Wherein, the wireless communication module is bidirectionally electrically connected to the eSIM card.

[0013] Wherein, the storage module is a FLASH memory.

[0014] The second aspect of the utility model provides a battery system, including the T-BOX for the vehicle-mounted power battery system, wherein the T-BOX is communicatively connected to the vehicle-mounted battery management system BMS and is communicatively connected to the battery enterprise monitoring platform.

[0015] A third aspect of the utility model provides an electric vehicle, comprising the battery system.

[0016] The utility model increases the security of data transmission between the T-BOX and the battery enterprise monitoring platform by adding a security encryption module; increases the amount of battery system status information transmitted by connecting the CAN bus of the vehicle-mounted battery management system BMS; eliminates the power consumption of the T-BOX when the vehicle is static by controlling the power supply of the T-BOX through the vehicle-mounted battery management system BMS; and eliminates the external separate GPS module by using an integrated wireless communication module of a GSM module and a GPS module two-in-one, and adopts the solution of the RTC timing module inside the MCU module without adding timing-related chips, thereby reducing the product size and reducing the product cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the vehicle-mounted TBOX under current technology.

[0018] Figure 2 It is a structural schematic diagram of the power battery system T-BOX of the utility model.

[0019] Figure 3 It is a structural schematic diagram of a power module of a power battery system T-BOX of the utility model. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] like Figures 2 to 3As shown, the power battery system T-BOX provided by the embodiment of the utility model includes an MCU module, a CAN communication module, a security encryption module, a storage module, a wireless communication module with a positioning function, and an eSIM card that cooperates with the wireless communication module for data transmission. The CAN communication module, the security encryption module, the storage module, and the wireless communication module are each communicatively connected with the MCU module, wherein the MCU module is the core of data processing and control of the T-BOX, the wireless communication module is used for bidirectional communication with the power battery monitoring platform, and sending or receiving information from the monitoring platform to the monitoring platform, and the CAN communication module is used for connecting to the CAN bus of the battery management system BMS, receiving relevant signals of the CAN of the battery management system BMS or sending relevant signals to the CAN bus of the battery management system BMS.

[0022] In the embodiment of the present application, the CAN communication module is bidirectionally electrically connected to the CAN interface of the vehicle battery management system BMS, and can be used for bidirectional signal transmission to receive all information about the battery system status collected from the BMS. Based on this communication T-BOX, the instructions to be processed by the BMS can be sent to the BMS, and the program upgrade or parameter configuration of the BMS can be completed. The CAN communication module is also bidirectionally electrically connected to the MCU module, and can be used for bidirectional signal transmission, and can receive information from the MCU module and output information to the MCU module.

[0023] The security encryption module and the MCU module are bidirectionally electrically connected and can be used for bidirectional signal transmission. When encryption is required, the input is the MCU module, and the MCU sends some sensitive unencrypted data to the security encryption module, which uses the SM2 standard encryption method to encrypt the data. After completion, the encrypted data is sent to the MCU module; when decryption is required, the MCU sends the encrypted upgrade firmware or sensitive parameter information received from the monitoring platform to the security encryption module. After decryption, the security encryption module sends the decrypted data to the MCU module.

[0024] The MCU module is the core of data processing and control of other modules. It performs data transmission with other modules and can control the working status of other modules. Every time the T-BOX is turned on, the battery enterprise monitoring platform will send the current time to the T-BOX, and then use the RTC timing module built into the MCU module to provide time to the T-BOX, without adding an additional chip with RTC timing function.

[0025] The storage module and the MCU module are bidirectionally electrically connected and can be used for bidirectional signal transmission. When data needs to be written to the storage module, the MCU module sends the data to the storage module, and the storage module stores the data according to the instructions. When data needs to be read from the storage module, the storage module sends the internal data to the MCU module according to the instructions.

[0026] In the embodiment of the utility model, the wireless communication module and the MCU module are bidirectionally electrically connected, and bidirectional signal transmission can be performed in use.

[0027] In the embodiment of the utility model, by adding a security encryption module, when the T-BOX needs to transmit sensitive information to the battery enterprise monitoring platform, the MCU module will send the sensitive data received from the CAN bus to the security encryption module, which will be encrypted by its security encryption chip before transmitting the information to the battery enterprise monitoring platform; similarly, when the information needs to be transmitted from the battery enterprise monitoring platform to the T-BOX, the encrypted information is received through the wireless communication module, and then the security encryption module decrypts it and transmits it to the on-board battery management system BMS, thereby solving the problem of the existing T-BOX setting. When the battery management system BMS is batch maintained or parameter configured through the vehicle T-BOX, the information security required by the ISO / SAE 21434:2021 standard cannot be guaranteed, and malicious attacks cannot be prevented, thereby creating a safety hazard to vehicles and personnel. At the same time, for some sensitive information collected by the T-BOX, the confidentiality of data transmission cannot be guaranteed, which can easily lead to the leakage of customer information or commercial information.

[0028] As a preferred embodiment, the wireless communication module adopts an integrated communication module of GPS and GSM two-in-one. The GPS module built into the wireless communication module is used for positioning the power battery system. This example adopts an integrated wireless communication module of GSM and GPS two-in-one (such as a 4G wireless communication module), uses the GSM module for data communication, and uses the GPS module for positioning, so as to reduce the product size and cost. The wireless communication module can adopt the SIMCom A7680C-MANV product. The security encryption module can adopt the CCM3310S-T product, and the CAN communication module can adopt the TJA1042 product.

[0029] In some embodiments, the wireless communication module is connected to the eSIM card and is bidirectionally electrically connected to the eSIM card. The eSIM card and the battery enterprise monitoring platform can perform bidirectional data transmission, cooperate with the communication module to perform data transmission function, and the power supply input of the eSIM card is provided by the communication module.

[0030] In some embodiments, the RTC timing module (S32K144 MCU chip can be used) inside the MCU chip of the MCU module is used to provide working time for T-BOX, and the storage module is a FLASH memory, which can use GD GD25Q256EYIGR product.

[0031] Furthermore, a power module is provided to provide working power for the T-BOX; in some embodiments, the input end of the power module is connected to a power output end of a vehicle-mounted battery management system BMS, and the vehicle-mounted battery management system BMS supplies power, so that the T-BOX and the vehicle-mounted battery management system BMS can work simultaneously. Since the input of the power module is a power output of the battery management system BMS, the T-BOX and the BMS work simultaneously, so when the BMS is powered on according to the status of the whole vehicle, a power supply is immediately output for powering the T-BOX. When the BMS is powered on according to the status of the whole vehicle, the output power supply is also stopped immediately, and the T-BOX is in a stopped working state. This T-BOX working mode will not generate static power consumption current when the whole vehicle is static, and will not consume the battery power of the whole vehicle under static conditions.

[0032] In a further embodiment, the power module includes a first voltage conversion unit, a second voltage conversion unit, and a third voltage conversion unit. The first voltage conversion unit is used to convert the input DC voltage into a 5V voltage for supplying the CAN communication module, and outputting it to the second voltage conversion unit and the third voltage conversion unit as the input voltage. The second voltage conversion unit is used to convert the 5V voltage into 3.3V for supplying the security encryption module, the MCU module, and the storage module. The third voltage conversion unit is used to convert the 5V voltage into a 3.8V voltage for supplying the 4G communication module. The first voltage conversion unit can adopt the product of RICHTEK RTQ2963GSP-QA, the second voltage conversion unit can adopt the product of RICHTEKRTQ2513TGQW, and the third voltage conversion unit can adopt the product of RICHTEK RTQ2531WGQW.

[0033] When the T-BOX of the embodiment of the utility model is working, the T-BOX is first connected to the CAN network of the vehicle-mounted battery management system BMS, and the CAN network has all the detailed information of the vehicle-mounted battery management system BMS system. At the same time, the other end of the T-BOX is connected to the remote monitoring platform of the battery company itself, thereby solving the problem that the T-BOX under the prior art is a T-BOX developed for the whole vehicle, which receives relevant information in the CAN bus of the whole vehicle. The CAN information of the whole vehicle is more about the status of the whole vehicle. For the battery system, there is only some extreme value information, fault alarm and other rough status information, but no detailed relevant information of the battery system, such as the voltage value, temperature value, module status in the system, detailed alarm fault and other parameters of each single cell, and the battery company cannot directly receive the status parameters of the battery system in real time. Often, after a fault or accident occurs, the whole vehicle forwards the data to the battery company, which is not convenient for problem analysis and after-sales service personnel to understand the situation in time, and it is even more impossible to perform intelligent analysis of existing data and predict faults and risks in advance.

[0034] The power input of the utility model is directly connected to the power output of the vehicle-mounted battery management system BMS, and it will work only when the vehicle-mounted battery management system BMS is awakened, so that no current of the vehicle battery will be consumed when the vehicle is static.

[0035] The utility model adopts the internal RTC timing module of the MCU module and the integrated wireless communication module of GPS and GSM two-in-one, and can be compatible with the GPR positioning function of the GSM module instead of the independent GPS module, thereby eliminating the GPS module, further reducing the cost and reducing the product size.

[0036] In summary, the utility model solves the problem of security of data transmission between T-BOX and monitoring platform through the design of the above technical solutions; solves the problem of insufficient battery system status information transmitted by vehicle-mounted T-BOX; solves the problem of excessive power consumption of T-BOX when the whole vehicle is static; solves the problem of large product size and high cost of T-BOX for battery system.

[0037] An embodiment of the utility model provides a battery system, including the T-BOX for a vehicle-mounted power battery system, wherein the T-BOX is communicatively connected to a vehicle-mounted battery management system BMS, and is communicatively connected to a battery enterprise monitoring platform.

[0038] The embodiment of the utility model further provides an electric vehicle, comprising the battery system.

[0039] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. T-BOX for vehicle-mounted power battery system, characterized in that: It includes an MCU module and a CAN communication module, a security encryption module, a storage module, and a wireless communication module with a positioning function that are bidirectionally electrically connected to the MCU module; the wireless communication module is used for bidirectional communication with the power battery monitoring platform, sending information to the power battery monitoring platform and receiving information from the power battery monitoring platform, and is also used for positioning the power battery system; the CAN communication module is used to connect to the CAN bus of the vehicle-mounted battery management system BMS, receive the CAN signal of the vehicle-mounted battery management system BMS, and send a signal from the vehicle-mounted CAN bus to the battery management system BMS; the security encryption module is used to encrypt or decrypt the data transmitted from the MCU module and then return it to the MCU module; The storage module is used to store the data transmitted from the MCU module when writing data and to transmit the stored data to the MCU module when reading data.

2. The T-BOX for a vehicle-mounted power battery system according to claim 1, characterized in that: The wireless communication module adopts a GPS and GSM two-in-one integrated communication module.

3. The T-BOX for a vehicle-mounted power battery system according to claim 1, characterized in that: It also includes a power module for providing working power to the T-BOX.

4. The T-BOX for a vehicle-mounted power battery system according to claim 3, characterized in that: The input end of the power module is connected to a power output end of the vehicle-mounted battery management system BMS, and is powered by the vehicle-mounted battery management system BMS, so that the T-BOX and the vehicle-mounted battery management system BMS can work simultaneously.

5. The T-BOX for a vehicle-mounted power battery system according to claim 3, characterized in that: The power supply module includes a first voltage conversion unit, a second voltage conversion unit, and a third voltage conversion unit. The first voltage conversion unit is used to convert the input voltage into a 5V voltage for use by the CAN communication module, and output it to the second voltage conversion unit and the third voltage conversion unit as input voltage. The second voltage conversion unit is used to convert the 5V voltage into 3.3V for use by the security encryption module, the MCU module, and the storage module. The third voltage conversion unit is used to convert the 5V voltage into a 3.8V voltage for use by the wireless communication module.

6. The T-BOX for a vehicle-mounted power battery system according to claim 1, characterized in that: The RTC timing module built into the MCU chip of the MCU module is used to provide working time for the T-box.

7. The T-BOX for a vehicle-mounted power battery system according to claim 1, characterized in that: The wireless communication module is bidirectionally electrically connected to the eSIM card.

8. The T-BOX for a vehicle-mounted power battery system according to claim 1, characterized in that: The storage module is a FLASH memory.

9. A battery system, characterized in that The invention comprises a T-BOX for a vehicle-mounted power battery system as claimed in any one of claims 1 to 8, wherein the T-BOX is communicatively connected to a vehicle-mounted battery management system BMS and is communicatively connected to a battery enterprise monitoring platform.

10. An electric vehicle, characterized in that: Comprising the battery system as claimed in claim 9.

Images