A battery management method, interface device, medium, controller and battery pack

Abstract

The present application belongs to the technical field of intelligent vehicles, and particularly relates to a battery management method, an interface device, a medium, a controller and a battery pack. In terms of hardware, the present application does not need to increase additional components such as microprocessors MCU (Microcontroller Unit) and system basis chips SBC (System Basis Chip), can simplify the system and significantly save material costs. In terms of software, the present application can integrate the target battery management system with the existing battery management system, and manage the target battery system by means of the existing battery management program or control strategy of the same type of battery, so that the development tools and application systems are reused or shared, and the research and development costs are further reduced. In addition, the system architecture of the present application is simplified, so that the physical space occupied by the battery management system is significantly reduced, which is beneficial to improving the energy density of the product, promoting the lightweight of the battery system, especially the 12V battery system, and improving the integration quality of the whole vehicle.

Description

Technical Field

[0001] This invention belongs to the field of intelligent vehicle technology, and particularly relates to a battery management method, interface device, medium, controller and battery pack. Background Technology

[0002] The vehicle's chemical battery and related management and auxiliary systems are indispensable functional units; they are essential components of vehicle electronic control, start-stop, auxiliary lighting, thermal management, and other processes; for electric and hybrid vehicles, they are even more so the energy support unit. With the continuous innovation of chemical energy storage technology, lead-acid batteries are increasingly being replaced by lithium batteries and other batteries with longer lifespans, more stable discharge characteristics, and better environmental performance.

[0003] However, new battery systems, such as lithium batteries, have highly active chemical properties in their energy storage units. To improve safety and avoid the risk of thermal runaway, more stringent requirements are placed on the safety monitoring of the system. As a result, the complexity and integration difficulty of related systems continue to increase.

[0004] To achieve a higher Automotive Safety Integration Level (ASIL), various microcontroller units (MCUs) and dedicated management devices or components have emerged in related technologies. For example, the analog front end (AFE) for battery sampling and the power management integrated circuit (PMIC) have been widely used. However, the selection process for these components is challenging, and there is an urgent need to reduce system complexity to facilitate the upgrading of the entire vehicle system and achieve technical and economic targets. Summary of the Invention

[0005] This invention discloses a battery management method, including a first integration and detection step and a second communication and regulation step. The first integration and detection step integrates a first battery or battery pack and a second battery or battery pack into a structural unit of a target system, and utilizes the existing hardware of the second battery or battery pack to implement relevant power management for the first battery or battery pack. The first battery or battery pack and / or the second battery or battery pack are electrically connected to the target power system. The switching devices and / or components for circuit switching of the first battery or battery pack and / or the second battery or battery pack are controlled by a drive unit dominated by the second battery or battery pack.

[0006] On the other hand, the second communication and regulation step exchanges data between the first battery or battery pack and the second battery or battery pack through the second communication and regulation unit; wherein, the second battery management system (BMS) of the second battery or battery pack executes management programs or controls the actions of the actuators; its management programs and / or the actions of the actuators are shared or jointly used between the first battery or battery pack and the second battery or battery pack; the second battery management system (BMS) is communicatively connected to the first integration and detection unit of the battery interface device through the communication line of the second communication and regulation unit.

[0007] The target system can be a system that is powered by a first battery or battery pack and / or a second battery or battery pack; the target system is typically an electrical device that operates independently off the power grid; such target systems include vehicles and other similar electrical devices.

[0008] Specifically, the first integration and detection step acquires a first set of parameter information of the first battery or battery pack, and the second communication and adjustment step exchanges information between the first battery or battery pack and the second battery or battery pack and sends control or drive commands from the control unit of the second battery or battery pack to the first battery or battery pack.

[0009] In this process, the second communication and regulation step stores or transmits the first set of parameter information via the second communication and regulation unit; the second battery management system (BMS) manages and controls the second battery or battery pack on the one hand; on the other hand, the first set of parameter information is processed in the second battery management system (BMS) and then sent to the first battery or battery pack via the second communication and regulation unit to update the relevant control or management process.

[0010] Specifically, the second communication and regulation unit can communicate using a daisy-chain structure or a CAN link; the daisy-chain structure or CAN link is connected between preset boards and / or chips; the second communication and regulation unit exchanges second communication and regulation information between the first integration and detection unit and the second microprocessor; the second microprocessor is used to manage the second battery or battery pack; at the same time, the second microprocessor receives and processes information from the first battery or battery pack; the second communication and regulation information is processed by the second battery management system (BMS) of the second battery or battery pack; the second communication and regulation information reflects or governs the power management or input / output of the first battery or battery pack.

[0011] Furthermore, the battery management method may also include a third protection and monitoring step; the third protection and monitoring step uses the microprocessor, actuator and / or drive unit of the aforementioned second battery management system (BMS) to process similar data or perform similar functions, referred to as "reuse"; furthermore, the third protection and monitoring step may use the control program and / or control strategy of the second battery management system (BMS) to manage the first battery or battery pack.

[0012] Specifically, the aforementioned target power system is powered by a first battery or battery pack and / or a second battery or battery pack; the target power system includes a first power system and a second power system; the first battery or battery pack and the second battery or battery pack use the same type or material of chemical battery system; these chemical battery systems may be lithium-ion battery systems; wherein the first battery or battery pack and the second battery or battery pack use different rated voltages; the first battery or battery pack supplies power to the first power system; the second battery or battery pack supplies power to the second power system; the rated voltage of the first battery or battery pack is lower than the rated voltage of the second battery or battery pack.

[0013] Furthermore, the rated voltage of the first battery or battery pack can be 12V; the rated output voltage of the voltage level used by the second battery or battery pack is greater than the rated voltage of the first battery or battery pack.

[0014] Specifically, the information processing hardware used by the second battery management system (BMS) supports daisy-chain communication; its information processing hardware includes at least one of a power management chip (PMIC) and a battery sampling analog front-end (AFE); its driving unit includes at least one of the following driving methods: relay driving and MOSFET driving; the control strategies and / or management methods that the second battery management system (BMS) may adopt include processing for at least one of the battery's state of charge (SOC), state of health (SOH), remaining energy (SOE), and state of power (SOP); these strategies and methods are also applied to the management or control of the first battery or battery pack.

[0015] Furthermore, this embodiment of the invention also discloses a battery interface device, including a first integration and detection unit and a second communication and regulation unit; wherein, the first integration and detection unit is used to integrate a first battery or battery pack and a second battery or battery pack into a structural unit of a target system, the first battery or battery pack and / or the second battery or battery pack being electrically connected to the target power system; the switching devices and / or circuit-switching components of the first battery or battery pack and / or the second battery or battery pack are controlled by a drive unit dominated by the second battery or battery pack; the second communication and regulation unit exchanges data between the first battery or battery pack and the second battery or battery pack; the second battery management system (BMS) of the second battery or battery pack executes management programs or controls the actions of actuators; its management programs and / or the actions of actuators are shared or jointly used between the first battery or battery pack and the second battery or battery pack; the second battery management system (BMS) is communicatively connected to the first integration and detection unit of the battery interface device through the communication line of the second communication and regulation unit.

[0016] The target system is a system powered by a first battery or battery pack and / or a second battery or battery pack; the target system includes electrical equipment that operates independently off the power grid; the target system can be a vehicle or other similar electrical equipment; the first integration and detection unit acquires a first set of parameter information of the first battery or battery pack; the second communication and regulation unit exchanges information between the first battery or battery pack and the second battery or battery pack, and the control unit of the second battery or battery pack sends control or drive commands to the first battery or battery pack; the second communication and regulation unit stores or transmits the first set of parameter information; the second battery management system (BMS) manages and controls the second battery or battery pack; the first set of parameter information is processed in the second battery management system (BMS) and then sent to the first battery or battery pack via the second communication and regulation unit.

[0017] Specifically, the second communication and regulation unit can communicate using a daisy-chain structure or a CAN link; its daisy-chain structure or CAN link is connected between preset boards and / or chips; the second communication and regulation unit exchanges second communication and regulation information between the first integration and detection unit and the second microprocessor; the second microprocessor is used to manage the second battery or battery pack; at the same time, the second microprocessor receives and processes information from the first battery or battery pack; the second communication and regulation information is processed by the second battery management system (BMS) of the second battery or battery pack; the second communication and regulation information reflects or governs the power management or input / output of the first battery or battery pack.

[0018] Furthermore, the device may also include a third protection and monitoring unit; the third protection and monitoring unit uses the microprocessor, actuator and / or drive unit of the second battery management system (BMS) to process the corresponding data; the third protection and monitoring unit uses the control program and / or control strategy of the second battery management system (BMS) to manage the first battery or battery pack.

[0019] Specifically, the target power system is powered by a first battery or battery pack and / or a second battery or battery pack; the target power system includes a first power system and a second power system; the first battery or battery pack and the second battery or battery pack use the same type or material of chemical battery system; the chemical battery system includes a lithium-ion battery system; the first battery or battery pack and the second battery or battery pack use different rated voltages; the first battery or battery pack powers the first power system; the second battery or battery pack powers the second power system; the rated voltage of the first battery or battery pack is lower than the rated voltage of the second battery or battery pack.

[0020] The rated voltage of the first battery or battery pack can be 12V; the rated output voltage of the second battery or battery pack is greater than the rated voltage of the first battery or battery pack; in this embodiment, the second battery or battery pack can be a power battery or battery pack used to provide energy for the drive motor.

[0021] Furthermore, the information processing hardware of the second battery management system (BMS) can support daisy-chain communication; its information processing hardware can be at least one of a power management chip (PMIC) and a battery sampling analog front-end (AFE); its driving unit can adopt at least one of the following driving methods: relay driving and MOSFET driving; the control strategy and / or management method adopted by the second battery management system (BMS) includes processing for at least one of the battery state of charge (SOC), state of health (SOH), remaining energy (SOE), and state of power (SOP).

[0022] Furthermore, embodiments of the present invention also disclose a computer storage medium, including a storage medium body for storing a computer program; when the computer program is executed by a microprocessor, it can implement any of the battery management methods described above.

[0023] In addition, a controller is disclosed, including any of the battery interface devices as described above; and / or any computer storage medium; similarly, a battery pack is also disclosed, including any of the battery interface devices as described above; and / or any of the computer storage media; and may also include any of the controllers as described above.

[0024] Compared with existing technologies, in terms of hardware, this invention does not require additional microprocessors (MCUs) and system base chips (SBCs), simplifying the system and significantly reducing material costs. In terms of software, this invention can integrate the target battery management system with existing battery management systems and manage the target battery system using existing battery management programs or control strategies for similar batteries, enabling the reuse or sharing of development tools and application systems, further reducing R&D costs. In addition, the system architecture of this invention is simplified, significantly reducing the physical space occupied by the battery management system, which is beneficial to improving the energy density of the product, promoting the lightweighting of battery systems, especially 12V battery systems, and improving the overall vehicle integration quality.

[0025] It should be noted that the terms "first," "second," and similar terms used in this article are merely for describing the constituent elements of the technical solution and do not constitute a limitation on the technical solution, nor should they be interpreted as an indication or implication of the importance of the corresponding elements; elements with terms such as "first," "second," or similar terms indicate that at least one of the elements is included in the corresponding technical solution. Attached Figure Description

[0026] To more clearly illustrate the technical solution of the present invention and facilitate a further understanding of its technical effects, features, and objectives, the present invention will be described in detail below with reference to the accompanying drawings. The drawings constitute an essential part of the specification and are used together with Embodiment 1 of the present invention to illustrate the technical solution of the present invention, but do not constitute a limitation on the present invention.

[0027] The same reference numerals in the attached diagrams represent the same parts, specifically: Figure 1 This is a schematic diagram illustrating the principle of batteries and their management systems in related technologies.

[0028] Figure 2 , Figure 8 , Figure 9 , Figure 10 This is a schematic diagram illustrating the principle of an embodiment of the battery system of the present invention.

[0029] Figure 3 This is a schematic diagram of the process of an embodiment of the method of the present invention.

[0030] Figure 4 This is a schematic diagram illustrating the composition principle of the interface component of the present invention.

[0031] Figure 5 This is a schematic diagram of the composition structure of an embodiment of the product of the present invention. Figure 1 .

[0032] Figure 6 This is a schematic diagram of the composition structure of an embodiment of the product of the present invention. Figure 2 .

[0033] Figure 7 This is a schematic diagram of the composition structure of an embodiment of the product of the present invention. Figure 3 .

[0034] in: 100 - First integration and testing step; 101 - First set of parameter information; 200 - Second Communication and Adjustment Steps; 201-Second Communication and Regulation Information; 300 - Third safeguard and monitoring steps; 301 - Third group of parameter information; 710 - Microprocessors in related technologies; 720 - System foundation chip in related technologies; 730 - Communication chips in related technologies; 800 - Second Reuse Management Unit; 801 - Second Multiplexing Processing Unit; 802 - Second Multiplexing Processing Unit; 808 - Second battery or battery pack; 810-Drive Unit; 900 - Vehicles; 901 - Controller; 903 - Computer storage media; 906 - Battery interface device; 909 - First battery or battery pack; 916 - First Integration and Detection Unit; 921 - DaisyChain, CAN bus or other real-time communication links; 926 - Second Communication and Regulation Unit; 936 - Third Protection and Monitoring Unit. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described below are merely illustrative of the technical solutions of the present invention, and not intended to limit the invention. Furthermore, the parts described in the embodiments or drawings are merely illustrative examples of relevant parts of the present invention, and not the entirety of the invention.

[0036] like Figure 3 The battery management method shown includes a first integration and detection step 100 and a second communication and regulation step 200; wherein, as Figure 1 , Figure 2 , Figure 7As shown, the first integration and detection step 100 integrates the first battery or battery pack 909 and the second battery or battery pack 808 onto the target system, i.e., the structural unit of the vehicle; the first battery or battery pack 909 and / or the second battery or battery pack 808 are electrically connected to the target electrical system; the switching devices and / or circuit-switching components of the first battery or battery pack 909 and / or the second battery or battery pack 808 are controlled by the drive unit 810 dominated by the second battery or battery pack 808; the second communication and regulation step 200 exchanges data between the first battery or battery pack 909 and the second battery or battery pack 808 through the second communication and regulation unit 926; wherein, the second battery management system (BMS) of the second battery or battery pack 808 executes management programs or controls the actions of the actuators; its management programs and / or the actions of the actuators are shared or jointly used between the first battery or battery pack 909 and the second battery or battery pack 808; the second battery management system (BMS) is communicatively connected to the first integration and detection unit 916 of the battery interface device 906 through the communication line of the second communication and regulation unit 926.

[0037] The target system is a vehicle 900 powered by a first battery or battery pack 909 and / or a second battery or battery pack 808. This target system operates independently of the power grid, and the target can also be other electrical equipment besides the vehicle 900. The first integration and detection step 100 acquires a first set of parameter information 101 from the first battery or battery pack 909. The second communication and regulation step 200 exchanges information between the first battery or battery pack 909 and the second battery or battery pack 808, and the control unit of the second battery or battery pack 808 sends control or drive commands to the first battery or battery pack 909. The second communication and regulation step 200 stores or transmits the first set of parameter information 101 via a second communication and regulation unit 926. The second battery management system (BMS) manages and controls the second battery or battery pack 808. The first set of parameter information 101 is processed in the second BMS and then sent to the first battery or battery pack 909 via the second communication and regulation unit 926.

[0038] Furthermore, the second communication and regulation unit 926 may employ, for example... Figure 1The daisy-chain structure or CAN link 921 shown communicates; the daisy-chain structure or CAN link 921 communicates between preset boards and / or chips; the second communication and regulation unit 926 exchanges second communication and regulation information 201 between the first integration and detection unit 916 and the second microprocessor 931; the second microprocessor 931 is used to manage the second battery or battery pack 808; at the same time, the second microprocessor 931 receives and processes information from the first battery or battery pack 909; the second communication and regulation information 201 is processed by the second battery management system (BMS) of the second battery or battery pack 808; the second communication and regulation information 201 reflects or governs the power management or input / output of the first battery or battery pack 909.

[0039] Furthermore, such as Figure 3 As shown, this embodiment also includes a third protection and monitoring step 300; wherein: the third protection and monitoring step 300 adopts the microprocessor, actuator and / or drive unit 810 of the second battery management system BMS; the third protection and monitoring step 300 adopts the control program and / or control strategy of the second battery management system BMS to manage the first battery or battery pack 909 and exchange a third set of parameter information 301, the third set of parameter information 301 including the control strategy and power management information shared by the first battery or battery pack 909 and the second battery or battery pack 808.

[0040] Specifically, the target power system is powered by a first battery or battery pack 909 and a second battery or battery pack 808; the target power system includes a first power system and a second power system; the first battery or battery pack 909 and the second battery or battery pack 808 use the same type or material of chemical battery system; the chemical battery system includes a lithium-ion battery system; the first battery or battery pack 909 and the second battery or battery pack 808 use different rated voltages; the first battery or battery pack 909 supplies power to the first power system; the second battery or battery pack 808 supplies power to the second power system; the rated voltage of the first battery or battery pack 909 is lower than the rated voltage of the second battery or battery pack 808.

[0041] The rated voltage of the first battery or battery pack 909 is 12V; the rated output voltage of the second battery or battery pack 808 is greater than the rated voltage of the first battery or battery pack 909.

[0042] Specifically, the information processing hardware used by the second battery management system (BMS) supports daisy-chain communication; the information processing hardware may be at least one of a power management chip (PMIC) or a battery sampling analog front-end (AFE); the drive unit 810 may be a relay driver or a MOSFET driver; the control strategy and / or management method used by the second battery management system (BMS) includes processing for at least one of the battery state of charge (SOC), state of health (SOH), remaining energy (SOE), and state of power (SOP).

[0043] In addition, such as Figure 2 , Figure 4 A battery interface device 906 is also disclosed, including a first integration and detection unit 916 and a second communication and regulation unit 926. The first integration and detection unit 916 is a structural unit for integrating a first battery or battery pack 909 and a second battery or battery pack 808 into a target system. The first battery or battery pack 909 and / or the second battery or battery pack 808 are electrically connected to the target power system. The switching devices and / or circuit-changing components of the first battery or battery pack 909 and / or the second battery or battery pack 808 are controlled by a drive unit 810 controlled by the second battery or battery pack 808. Control; data is exchanged between the first battery or battery pack 909 and the second battery or battery pack 808 via the second communication and regulation unit 926; wherein, the second battery management system (BMS) of the second battery or battery pack 808 executes management programs or controls the actions of actuators; the management programs and / or the actions of actuators are shared or jointly used between the first battery or battery pack 909 and the second battery or battery pack 808; the second battery management system (BMS) is communicatively connected to the first integration and detection unit 916 of the battery interface device 906 via the communication line of the second communication and regulation unit 926.

[0044] The target system is a system powered by a first battery or battery pack 909 and / or a second battery or battery pack 808; the target system includes electrical equipment that operates independently off the power grid; it can be, for example... Figure 5 , Figure 6 , Figure 7The system includes a vehicle 900 and electrical equipment; a first integration and detection unit 916 acquires a first set of parameter information 101 from a first battery or battery pack 909; a second communication and regulation unit 926 exchanges information between the first battery or battery pack 909 and a second battery or battery pack 808, and the control unit of the second battery or battery pack 808 sends control or drive commands to the first battery or battery pack 909; the second communication and regulation unit 926 stores or transmits the first set of parameter information 101; a second battery management system (BMS) manages and controls the second battery or battery pack 808; the first set of parameter information 101 is processed in the second battery management system (BMS) and then sent to the first battery or battery pack 909 via the second communication and regulation unit 926; thereby realizing the management or control of the first battery or battery pack.

[0045] Specifically, the second communication and regulation unit 926 can communicate using a daisy-chain structure or a CAN link 921; the daisy-chain structure or CAN link 921 connects the pre-defined boards and / or chips; the second communication and regulation unit 926 exchanges second communication and regulation information 201 between the first integration and detection unit 916 and the second microprocessor 931; the second microprocessor 931 manages the second battery or battery pack 808; simultaneously, the second microprocessor 931 receives and processes information from the first battery or battery pack 909; the second communication and regulation information 201 is processed by the second battery management system (BMS) of the second battery or battery pack 808; the second communication and regulation information 201 reflects or governs the power management or input / output of the first battery or battery pack 909.

[0046] Furthermore, this embodiment also includes a third protection and monitoring unit 936; wherein, the third protection and monitoring unit 936 uses the microprocessor, actuator and / or drive unit 810 of the second battery management system (BMS) for management or control; the third protection and monitoring unit 936 uses the control program and / or control strategy of the second battery management system (BMS) to manage the first battery or battery pack 909 and exchange a third set of parameter information 301, the third set of parameter information 301 including the control strategy and power management information shared by the first battery or battery pack 909 and the second battery or battery pack 808.

[0047] The target power system is powered by a first battery or battery pack 909 and / or a second battery or battery pack 808; the target power system includes a first power system and a second power system; the first battery or battery pack 909 and the second battery or battery pack 808 use the same type or material of chemical battery system; the chemical battery system includes a lithium-ion battery system; the first battery or battery pack 909 and the second battery or battery pack 808 use different rated voltages; the first battery or battery pack 909 supplies power to the first power system; the second battery or battery pack 808 supplies power to the second power system; the rated voltage of the first battery or battery pack 909 is lower than the rated voltage of the second battery or battery pack 808.

[0048] Specifically, the rated voltage of the first battery or battery pack 909 can be 12V; the rated output voltage of the voltage level used by the second battery or battery pack 808 is greater than 12V.

[0049] Furthermore, the information processing hardware used in the second battery management system (BMS) supports daisy-chain communication; its information processing hardware includes at least one of a power management chip (PMIC) and a battery sampling analog front-end (AFE); its drive unit 810 includes at least one of the following drive methods: relay drive and MOSFET drive; the control strategy and / or management method used in the second battery management system (BMS) includes processing for at least one of the battery state of charge (SOC), state of health (SOH), remaining energy (SOE), and state of power (SOP).

[0050] In addition, such as Figures 5 to 7 A computer storage medium 903 is also disclosed, including a storage medium body for storing a computer program; when executed by a microprocessor, the computer program can implement any of the battery management methods described above; similarly, its controller 901, including any of the battery interface devices 906 described above; and / or any of the computer storage media 903; also adopts the same inventive concept. A battery pack 909 adopting the same inventive concept may also include any of the battery interface devices 906 described above; and / or any of the computer storage media 903; and / or any of the controllers 901; its physical processes and solutions are similar or correspond to each other, and will not be described in detail here.

[0051] For example Figure 2 The battery management system shown employs a daisy-chain communication structure and a 12V first battery or battery pack 909. Its chemical battery is a 12V lithium battery. Its control system shares the resources of the high-voltage BMS. The 12V lithium battery system of the first battery or battery pack 909 also uses a relay control harness as a drive unit 810. The aforementioned daisy-chain communication harness serves as the basic carrier for the daisy-chain structure or CAN link 921, and is powered by the high-voltage BMS harness.

[0052] The 12V lithium battery system includes a battery cell, a shunt sensor for detecting the current of the lithium battery system, a negative temperature coefficient (NTC) unit for detecting the temperature of the shunt sensor, an NTC unit for detecting the temperature of the 12V lithium battery system, a fuse for protecting the lithium battery system, a relay for switching the output of the 12V lithium battery system, and a data acquisition board for monitoring relevant parameters of the 12V lithium battery system.

[0053] Specifically, its acquisition board mainly consists of a front-end acquisition chip (AFE) and corresponding sampling equalization circuits and daisy-chain communication circuits. This acquisition board can acquire the voltage of each individual battery cell, acquire the current of the 12V lithium battery system through shunt, acquire the battery module voltage, fuse back-end voltage, relay back-end voltage, shunt temperature, and module temperature through the battery sampling analog front-end AFE (General-purpose input / output) of the AFE, and summarize the above relevant information into the first set of parameter information 101, and upload it to the high-voltage BMS in real time through the second communication and regulation unit 926, using the daisy-chain structure or CAN link 921.

[0054] Among them, high-voltage BMS is the current common technology. Its minimum system generally consists of a power management chip PMIC, a microprocessor MCU, a daisy-chain communication bridge chip CB (Communication Bbridge), a driver unit HSD (High Side Drivers), and LSD (Low Side Drivers). The power supply of its high-voltage BMS can be taken from the back end of the 12V lithium battery system fuse to form a constant power supply.

[0055] Specifically, after receiving relevant information about the 12V lithium battery system through the DaisyChain structure or CAN link 921, if the high-voltage BMS detects that the 12V lithium battery system is fault-free, it can close the relay of the 12V lithium battery system through the drive unit to enable the 12V lithium battery system to supply power to the outside. When the high-voltage BMS detects abnormal parameters of the 12V lithium battery system (overvoltage, undervoltage, overtemperature, overcurrent), it can actively disconnect the relay to protect the safety of the 12V lithium battery system.

[0056] In this invention, only one AFE chip needs to be placed in the 12V lithium battery system, i.e., the first battery or battery pack 909. This chip can be NXP's MC33772 or a similar front-end sampling chip that can detect current. At this time, the above-mentioned functions of the acquisition board can be realized by the method of the present invention. The relevant control strategy is implemented by the high-voltage BMS.

[0057] Since the lithium batteries used in the 12V lithium battery system are the same as those used in the high-voltage battery system, the hardware resources such as the PMIC / MCU of the high-voltage BMS can be reused. In terms of software, the relevant control strategies of the high-voltage battery management system, such as battery parameter monitoring and key battery algorithms, can be reused. Among them, the key algorithms include several functional units that process the battery's state of charge (SOC), state of health (SOH), state of energy (SOE), and state of power (SOP).

[0058] Based on the above improvements, both the system's Bill of Material (BOM) cost and development cost can be significantly reduced. Furthermore, when selecting materials, such as the aforementioned AFE chip, options can be chosen from current mainstream products, which generally support data acquisition functions and meet ASIL-D requirements. This allows the embodiments of the present invention to support a higher safety level, ASIL-D, on relatively economical hardware, thereby improving the feasibility of system integration, facilitating the technological upgrade process represented by 12V lithium batteries, and promoting the replacement of lead-acid batteries. Figure 1 , Figure 2 A comparison reveals that the core control modules of a 12V BMS and a high-voltage BMS process similar information or can use the same data structure, both possessing power management units, data management units, and drive units. Furthermore, high-voltage batteries also face the risk of thermal runaway, therefore the safety level requirements for high-voltage BMS must meet ASIL C to ASIL D. If a higher-end chip is chosen for the 12V BMS, and the data volume of the 12V battery system is relatively small, it could potentially lead to a waste of resources. Figure 2 , Figure 8 , Figure 9 , Figure 10 As shown, in this embodiment of the invention, the 12V BMS data processing unit is moved to the high-voltage BMS, and the control strategy is also integrated into the high-voltage BMS. Only the AFE front-end acquisition unit is retained in the 12V battery system, which can maximize the reuse of the high-voltage BMS's hardware and software resources, resulting in a high degree of integration and a significant reduction in BOM and development costs.

[0059] On the other hand, 12V lead-acid batteries are prone to a sharp reduction in battery life when the depth of discharge increases; the battery life is generally close to 1-2 years, which increases maintenance costs; furthermore, by adopting the method and product of this invention based on lithium batteries, the technical problems such as a sudden drop in effective capacity and short cycle life after lead-acid batteries age can also be avoided.

[0060] It should be noted that the above embodiments are only for more clearly illustrating the technical solution of the present invention. Those skilled in the art will understand that the implementation of the present invention is not limited to the above content. Any obvious changes, substitutions or replacements made based on the above content do not exceed the scope of the technical solution of the present invention. Other implementations will also fall within the scope of the present invention without departing from the concept of the present invention.

Claims

1. A battery management method, characterized in that, It includes a first integration and detection step (100) and a second communication and regulation step (200); wherein, the first integration and detection step (100) integrates a first battery or battery pack (909) and a second battery or battery pack (808) into the structural unit of the target system, and the first battery or battery pack (909) and / or the second battery or battery pack (808) are electrically connected to the target power system; the switching devices and / or components for switching circuits of the first battery or battery pack (909) and / or the second battery or battery pack (808) are controlled by a drive unit (810) dominated by the second battery or battery pack (808); The second communication and regulation step (200) exchanges data between the first battery or battery pack (909) and the second battery or battery pack (808) through the second communication and regulation unit (926); wherein, the second battery management system (BMS) of the second battery or battery pack (808) executes management programs or controls the actions of actuators; the management programs and / or the actions of the actuators are shared or jointly used between the first battery or battery pack (909) and the second battery or battery pack (808); the second battery management system (BMS) is communicatively connected to the first integration and detection unit (916) of the battery interface device (906) through the communication line of the second communication and regulation unit (926).

2. The battery management method as described in claim 1, wherein: The target system is a system powered by the first battery or battery pack (909) and / or the second battery or battery pack (808); the target system includes electrical equipment that can operate independently off the power grid; The first integration and detection step (100) acquires the first set of parameter information (101) of the first battery or battery pack (909), and the second communication and adjustment step (200) exchanges information between the first battery or battery pack (909) and the second battery or battery pack (808) and sends control or drive commands from the control unit of the second battery or battery pack (808) to the first battery or battery pack (909). The second communication and regulation step (200) stores or transmits the first set of parameter information (101) via the second communication and regulation unit (926); the second battery management system (BMS) manages and controls the second battery or battery pack (808); the first set of parameter information (101) is processed in the second battery management system (BMS) and then sent to the first battery or battery pack (909) via the second communication and regulation unit (926).

3. The battery management method as described in claim 1 or 2, wherein: The second communication and regulation unit (926) communicates using a daisy-chain structure or a CAN link (921); the daisy-chain structure or CAN link (921) is connected between preset boards and / or chips; the second communication and regulation unit (926) exchanges second communication and regulation information (201) between the first integration and detection unit (916) and the second microprocessor (931); the second microprocessor (931) manages the second battery or battery pack (808); at the same time, the second microprocessor (931) receives and processes information from the first battery or battery pack (909); the second communication and regulation information (201) is processed by the second battery management system (BMS) of the second battery or battery pack (808); the second communication and regulation information (201) reflects or governs the power management or input / output of the first battery or battery pack (909).

4. The battery management method as described in claim 3, further comprising a third protection and monitoring step (300); wherein: The third protection and monitoring step (300) uses the microprocessor, actuator and / or drive unit (810) of the second battery management system (BMS); the third protection and monitoring step (300) uses the control program and / or control strategy of the second battery management system (BMS) to manage the first battery or battery pack (909) and exchange the third set of parameter information (301), the third set of parameter information (301) includes the control strategy and power management information shared by the first battery or battery pack (909) and the second battery or battery pack (808).

5. The battery management method as described in claim 1, 2, or 4, wherein: The target power system is powered by the first battery or battery pack (909) and / or the second battery or battery pack (808); the target power system includes a first power system and a second power system; the first battery or battery pack (909) and the second battery or battery pack (808) use the same type or material of chemical battery system; the chemical battery system includes a lithium-ion battery system; the first battery or battery pack (909) and the second battery or battery pack (808) use different rated voltages; the first battery or battery pack (909) supplies power to the first power system; the second battery or battery pack (808) supplies power to the second power system; the rated voltage of the first battery or battery pack (909) is lower than the rated voltage of the second battery or battery pack (808).

6. The battery management method as described in claim 5, wherein: The rated voltage of the first battery or battery pack (909) is 12V; the rated output voltage of the voltage level used by the second battery or battery pack (808) is greater than the rated voltage of the first battery or battery pack (909).

7. The battery management method as described in claim 1, 2, 4 or 6, wherein: The second battery management system (BMS) uses information processing hardware that supports daisy-chain communication; the information processing hardware includes at least one of a power management chip (PMIC) and a battery sampling analog front-end (AFE); the drive unit (810) includes at least one of the following drive methods: relay drive and MOSFET drive; the control strategy and / or management method used by the second battery management system (BMS) includes processing for at least one of the battery state of charge (SOC), state of health (SOH), remaining energy (SOE), and state of power (SOP).

8. A battery interface device (906), comprising a first integration and detection unit (916) and a second communication and regulation unit (926); wherein, The first integration and detection unit (916) is a structural unit for integrating a first battery or battery pack (909) and a second battery or battery pack (808) into the target system. The first battery or battery pack (909) and / or the second battery or battery pack (808) are electrically connected to the target power system. The switching devices and / or circuit-switching components of the first battery or battery pack (909) and / or the second battery or battery pack (808) are controlled by a drive unit (810) dominated by the second battery or battery pack (808). Data is exchanged between the first battery or battery pack (909) and the second battery or battery pack (808) via the second communication and regulation unit (926); wherein, the second battery management system (BMS) of the second battery or battery pack (808) executes management programs or controls the actions of actuators; the management programs and / or the actions of the actuators are shared or jointly used between the first battery or battery pack (909) and the second battery or battery pack (808); the second battery management system (BMS) is communicatively connected to the first integration and detection unit (916) of the battery interface device (906) via the communication line of the second communication and regulation unit (926).

9. The battery interface device (906) as claimed in claim 8, wherein: The target system is a system powered by the first battery or battery pack (909) and / or the second battery or battery pack (808); the target system includes electrical equipment that can operate independently off the power grid; The first integration and detection unit (916) acquires the first set of parameter information (101) of the first battery or battery pack (909), and the second communication and regulation unit (926) exchanges information between the first battery or battery pack (909) and the second battery or battery pack (808) and sends control or drive commands to the first battery or battery pack (909) by the control unit of the second battery or battery pack (808). The second communication and regulation unit (926) stores or transmits the first set of parameter information (101) via the second communication and regulation unit (926); the second battery management system (BMS) manages and controls the second battery or battery pack (808); the first set of parameter information (101) is processed in the second battery management system (BMS) and then sent to the first battery or battery pack (909) via the second communication and regulation unit (926).

10. The battery interface device (906) as claimed in claim 8 or 9, wherein: The second communication and regulation unit (926) communicates using a daisy-chain structure or a CAN link (921); the daisy-chain structure or CAN link (921) is connected between preset boards and / or chips; the second communication and regulation unit (926) exchanges second communication and regulation information (201) between the first integration and detection unit (916) and the second microprocessor (931); the second microprocessor (931) manages the second battery or battery pack (808); at the same time, the second microprocessor (931) receives and processes information from the first battery or battery pack (909); the second communication and regulation information (201) is processed by the second battery management system (BMS) of the second battery or battery pack (808); the second communication and regulation information (201) reflects or governs the power management or input / output of the first battery or battery pack (909).

11. The battery interface device (906) as claimed in claim 10, further comprising a third protection and monitoring unit (936); wherein: The third protection and monitoring unit (936) adopts the microprocessor, actuator and / or drive unit (810) of the second battery management system (BMS); the third protection and monitoring unit (936) adopts the control program and / or control strategy of the second battery management system (BMS) to manage the first battery or battery pack (909) and exchange the third set of parameter information (301), the third set of parameter information (301) includes the control strategy and power management information shared by the first battery or battery pack (909) and the second battery or battery pack (808).

12. The battery interface device (906) as claimed in claim 8, 9 or 11, wherein: The target power system is powered by the first battery or battery pack (909) and / or the second battery or battery pack (808); the target power system includes a first power system and a second power system; the first battery or battery pack (909) and the second battery or battery pack (808) use the same type or material of chemical battery system; the chemical battery system includes a lithium-ion battery system; the first battery or battery pack (909) and the second battery or battery pack (808) use different rated voltages; the first battery or battery pack (909) supplies power to the first power system; the second battery or battery pack (808) supplies power to the second power system; the rated voltage of the first battery or battery pack (909) is lower than the rated voltage of the second battery or battery pack (808).

13. The battery interface device (906) as claimed in claim 12, wherein: The rated voltage of the first battery or battery pack (909) is 12V; the rated output voltage of the voltage level used by the second battery or battery pack (808) is greater than the rated voltage of the first battery or battery pack (909).

14. The battery interface device (906) as claimed in claim 8, 9, 11 or 13, wherein: The second battery management system (BMS) uses information processing hardware that supports daisy-chain communication; the information processing hardware includes at least one of a power management chip (PMIC) and a battery sampling analog front-end (AFE); the drive unit (810) includes at least one of the following drive methods: relay drive and MOSFET drive; the control strategy and / or management method used by the second battery management system (BMS) includes processing for at least one of the battery state of charge (SOC), state of health (SOH), remaining energy (SOE), and state of power (SOP).

15. A computer storage medium (903) comprising a storage medium body for storing a computer program; said computer program, when executed by a microprocessor, implements the battery management method as described in any one of claims 1 to 7.

16. A controller (901) comprising a battery interface device (906) as claimed in any one of claims 8 to 14; and / or a computer storage medium (903) as claimed in claim 15.

17. A battery pack (909) comprising a battery interface device (906) as claimed in any one of claims 8 to 14; and / or a computer storage medium (903) as claimed in claim 15; and / or a controller (901) as claimed in claim 16.

Images