A bus energy storage system

Abstract

The embodiment of the present application discloses a bus energy storage system. The bus energy storage system is a two-layer architecture, and the bus energy storage system comprises a display control module and at least one slave control module. The display control module is located in one layer of the two-layer architecture, and the at least one slave control module is located in another layer of the two-layer architecture. The slave control module comprises a bus, a master control unit and at least one slave control unit. The display control module is electrically connected with the master control unit and the at least one slave control unit through the bus. The bus is used for signal transmission between the display control module and the master control unit and signal transmission between the display control module and the slave control unit. The bus energy storage system provided by the embodiment of the present application can improve the communication bandwidth of the bus energy storage system, solve the bandwidth bottleneck of the low-speed bus in large-scale data acquisition, and effectively improve the signal acquisition efficiency, the signal transmission rate and the working efficiency of the bus energy storage system.

Description

Technical Field

[0001] The embodiments of the present invention relate to industrial control and communication technology, and in particular to a bus energy storage system. Background Technology

[0002] For new energy vehicles such as electric vehicles, the battery pack is the power source for all devices on the vehicle that require power, and is a crucial component of the electric vehicle. The charging and discharging control of the battery pack, as well as the voltage and current acquisition of the battery cells, are the responsibility of the battery pack's energy storage system. In the energy storage system, the bus, as the common communication trunk line for transmitting information between various functional components, is indispensable.

[0003] Currently, existing bus-based energy storage systems typically use CAN communication buses or daisy-chain communication buses. These two communication methods have bandwidth bottlenecks when acquiring large-scale data, resulting in low communication bandwidth for bus-based energy storage systems. This affects the signal acquisition efficiency, signal transmission rate, and overall operating efficiency of the bus-based energy storage systems. Summary of the Invention

[0004] This invention provides a bus energy storage system to improve the communication bandwidth of the bus energy storage system, solve the bandwidth bottleneck of low-speed bus during large-scale data acquisition, and effectively improve the signal acquisition efficiency, signal transmission rate and working efficiency of the bus energy storage system.

[0005] This invention provides a bus energy storage system with a two-layer architecture. The bus energy storage system includes a display and control module and at least one slave control module. The display and control module is located on one layer of the two-layer architecture, and the at least one slave control module is located on the other layer of the two-layer architecture.

[0006] The slave control module includes an AUTBUS bus, a master control unit, and at least one slave control unit. The display control module is electrically connected to the master control unit and at least one slave control unit via the bus. The bus is used for signal transmission between the display control module and the master control unit, as well as between the display control module and the slave control unit.

[0007] Optionally, the display and control module is equipped with a master station, and the slave control module is equipped with a slave station. The master station is electrically connected to the slave station via a bus.

[0008] Optionally, the display and control module includes a first bus chip and a controller. The controller is electrically connected to the first bus chip, and the first bus chip is electrically connected to the master control unit and at least one slave control unit via a bus.

[0009] Optionally, the main control unit includes a second bus chip and a switching chip. The second bus chip and the switching chip are electrically connected, and the switching chip is used to transmit the signals of the second bus chip to the host computer.

[0010] Optionally, the main control unit also includes an interface circuit, which is electrically connected to the second bus chip.

[0011] Optionally, the slave control unit includes a third bus chip and an isolator, the isolator being used to transmit signals acquired by the slave control unit to the third bus chip.

[0012] Optionally, there are multiple master control units and multiple slave control units, with the number of master control units being less than the number of slave control units, and one master control unit corresponding to multiple slave control units.

[0013] Optionally, there can be multiple slave control modules.

[0014] Optionally, the bus energy storage system is an energy storage system for the electric vehicle battery pack.

[0015] Optionally, the main control unit is electrically connected to the electric vehicle battery pack, and the slave control unit is electrically connected to the battery cells in the electric vehicle battery pack.

[0016] The bus energy storage system provided in this embodiment of the invention has a two-layer architecture. The system includes a control module and at least one slave module. The control module is located on one layer of the two-layer architecture, and the slave module is located on the other layer. Each slave module includes a bus, a master control unit, and at least one slave control unit. The control module is electrically connected to the master control unit and the at least one slave control unit via the bus. The bus is used for signal transmission between the control module and the master control unit, and between the control module and the slave control units. This bus energy storage system, based on a two-layer architecture and using the AUTBUS bus, improves the communication bandwidth of the bus energy storage system, solves the bandwidth bottleneck of low-speed buses during large-scale data acquisition, and effectively improves the signal acquisition efficiency, signal transmission rate, and operating efficiency of the bus energy storage system. Attached Figure Description

[0017] Figure 1 This is a structural block diagram of a bus energy storage system in the prior art;

[0018] Figure 2 This is a structural block diagram of a CAN communication architecture in the prior art;

[0019] Figure 3 This is a structural block diagram of a daisy-chain communication architecture in the prior art;

[0020] Figure 4 This is a structural block diagram of a bus energy storage system provided in an embodiment of the present invention;

[0021] Figure 5 This is a structural block diagram of a display and control module provided in an embodiment of the present invention;

[0022] Figure 6 This is a structural block diagram of a main control unit provided in an embodiment of the present invention;

[0023] Figure 7 This is a structural block diagram of a slave control unit provided in an embodiment of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0025] Figure 1 This is a structural block diagram of a bus energy storage system in the prior art. Figure 1 The illustrated bus energy storage system is a typical traditional CAN bus energy storage system used in battery packs. This system employs a three-layer architecture, consisting of a display and control module in the third layer, a master control module in the second layer, and a slave control module in the first layer. In this three-layer architecture, the CAN bus between layers two and three has insufficient bandwidth and poor real-time performance for large-scale data acquisition. The 500Kbps data rate means the display and control module needs more than ten seconds to poll the cell status; furthermore, it does not support GPS time synchronization and lacks a TSN network mechanism similar to the 1588 protocol, resulting in the absence of high-precision data timestamps and insufficient synchronization of large-scale data acquisition. Therefore, it can only support relatively coarse SOC / SOH algorithms. Battery lifespan deteriorates significantly, and energy utilization is low.

[0026] Figure 2 This is a structural block diagram of a CAN communication architecture in the prior art. Figure 3 This is a structural block diagram of a daisy-chain communication architecture in existing technology. (Reference) Figure 2 and Figure 3Currently, the commonly used buses in the energy storage field are CAN communication and daisy-chain communication. Because CAN communication has a long history of application in automotive electronics and offers good communication stability, it continues to be used between the main board and slave boards of electric vehicle battery packs. However, due to cost considerations in automotive electronics, the industry has gradually developed a new communication method—daisy-chain communication. Daisy-chain communication uses fewer components (reducing chip usage) and has a cost advantage. Although its stability is lower than CAN communication, energy storage systems are mostly placed in a relatively closed application environment (within the battery pack), and the wiring harness between the main board and slave boards is shorter, meeting application requirements. Therefore, daisy-chain communication is currently more widely used in the market. Energy storage systems are large-scale applications of cell status monitoring based on electric vehicle battery pack technology, and they also utilize the two bus technologies mentioned above. Because daisy-chain usage is less common than CAN bus and its stability is lower, CAN bus is currently the primary bus in energy storage systems. Both CAN bus and daisy-chain bus are low-speed buses. The CAN bus can reach a maximum speed of 2Mbps, but in automotive battery packs, due to limitations in the number of nodes and data stability, it typically operates below 1Mbps, and stably between 250 and 500Kbps. Daisy-chain buses also typically operate below 1Mbps, and because they use a daisy-chain (one-in, one-out) network topology, the failure of a single node chip can cause the entire network to break down, resulting in lower reliability.

[0027] To address the aforementioned issues, this embodiment proposes a bus-based energy storage system. Figure 4 This is a structural block diagram of a bus energy storage system provided in an embodiment of the present invention. This embodiment can be applied to electric vehicle battery packs and the like. The bus energy storage system is a two-layer architecture. The bus energy storage system includes: a display and control module BAMS and at least one slave control module. The display and control module BAMS is located on the first layer of the two-layer architecture, and each slave control module is located on the other layer of the two-layer architecture.

[0028] The slave control module includes an AUTBUS bus, a master control unit (BCMS), and at least one slave control unit (BMU). The display and control module (BAMS) is electrically connected to the master control unit (BCMS) and each slave control unit (BMU) via the bus. The bus is used for signal transmission between the display and control module (BAMS) and the master control unit (BCMS), as well as between the display and control module (BAMS) and the slave control units (BMU).

[0029] For example, the bus energy storage system is an energy storage system for an electric vehicle battery pack, and the bus is an AUTBUUS bus. The bus energy storage system adopts a two-layer architecture, including a second-layer control module BAMS and a first-layer slave control module consisting of the AUTBUUS bus, master control unit BCMS, and slave control unit BMU. Figure 4The diagram illustrates the main control units BCMS1-BCMS5. BCMS1 corresponds to slave control units BMU1-1 to BMU1-1-6, which in turn correspond to cells PACK1-1 to PACK-1-6 in the electric vehicle battery pack. The main control unit BCMS controls the charging and discharging of the electric vehicle battery pack, while the slave control units BMUs collect data such as voltage and current from the cells within the battery pack. Information collected by both the main control unit BCMS and the slave control units BMUs can be transmitted to the main control unit BCMS via the AUTBUS bus. The main control unit BCMS can then perform overall control of the electric vehicle battery pack based on the received information. This bus-based energy storage system, using the AUTBUS bus standard, achieves high-speed, high-real-time communication and control in energy storage voltage acquisition, current acquisition, temperature acquisition, and charging / discharging control. This enables full-network topology optimization and improves the communication bandwidth of the bus-based energy storage system, overcoming the bandwidth bottleneck of low-speed buses during large-scale data acquisition.

[0030] Furthermore, the high real-time synchronous data acquisition of the AUTBUS bus forms the basis for high-precision intelligent algorithms, significantly extending battery life. Additionally, the extremely low bit error rate of the AUTBUS bus improves system robustness. The AUTBUS bus addresses the issues of bus bandwidth, real-time performance, and reliability in energy storage systems. As a domestically produced, fully independent and controllable bus chip, the AUTBUS bus is of paramount importance for the network security of new energy systems and the stable operation of the entire network. Simultaneously, the high reliability of the AUTBUS bus reduces maintenance costs for frontline operators, simplifies on-site operations, facilitates the widespread adoption of advanced technologies, and improves the efficiency of production and construction. The high real-time performance of the AUTBUS bus, combined with highly intelligent algorithms, brings cost reduction and efficiency improvement value in energy storage fields such as wind power, photovoltaics, and hydropower, greatly enhancing energy utilization and significantly contributing to the achievement of dual-carbon goals.

[0031] The bus energy storage system provided in this embodiment has a two-layer architecture. The system includes a control module and at least one slave module. The control module is located on one layer of the two-layer architecture, and the slave module is located on the other layer. Each slave module includes an AUTBUS bus, a master control unit, and at least one slave control unit. The control module is electrically connected to the master control unit and the at least one slave control unit via the bus. The bus is used for signal transmission between the control module and the master control unit, and between the control module and the slave control units. This bus energy storage system, based on a two-layer architecture and using the AUTBUS bus, improves the communication bandwidth of the bus energy storage system, solves the bandwidth bottleneck of low-speed buses during large-scale data acquisition, and effectively improves the signal acquisition efficiency, signal transmission rate, and overall operating efficiency of the bus energy storage system.

[0032] Optionally, the display and control module BAMS is equipped with a master station, and the slave control module is equipped with a slave station. The master station is electrically connected to the slave station via the AUTBUS bus.

[0033] In this system, there is at least one master station and at least one slave station, and there can be multiple slave stations. Devices in the Display and Control Module (BAMS) are connected to the AUTBUUS bus via the master station. Both the Master Control Unit (BCMS) and the Slave Control Unit (BMU) in the slave control module are connected to the AUTBUUS bus via slave stations, thus enabling communication between the BAMS and BCMS for signal transmission, as well as communication between the BAMS and BMUs for signal transmission.

[0034] Optionally, the display and control module BAMS includes a first bus chip K1 and a controller U1. The controller U1 is electrically connected to the first bus chip K1, and the first bus chip K1 is electrically connected to the master control unit BCMS and each slave control unit BMU through a bus.

[0035] For example, Figure 5 This is a structural block diagram of a display and control module provided in an embodiment of the present invention. (Reference) Figure 1 and Figure 5 The display and control module BAMS includes multiple first bus chips K1, each of which is electrically connected to the controller U1. Each first bus chip K1 can be connected to different slave control modules. The signals from the slave control modules are transmitted to the controller U1 through the first bus chip K1. The controller U1 can analyze and process the received signals and transmit them to the host computer.

[0036] in addition, Figure 1 and Figure 5 The diagram also illustrates the DDR memory, clock, PPS+TOD interface, MAC chip, and PHY chip. Signals from the first bus chip K1 can be transmitted sequentially to the controller U1 via transceiver KD and the MAC chip. Signals from the first bus chip K1 can also be transmitted to the PPS interface and the transmitter UA. The display and control module BAMS communicates with the host PC via the TX PHY interface, FX PHY interface, and PCS interface.

[0037] Optionally, the main control unit BCMS includes a second bus chip K2 and a switching chip. The second bus chip K2 is electrically connected to the switching chip, and the switching chip is used to transmit the signals of the second bus chip K2 to the host computer.

[0038] For example, Figure 6 This is a structural block diagram of a main control unit provided in an embodiment of the present invention. Figure 6The main control unit BCMS, as shown in the diagram, is powered by a DC power supply, such as a 24VDC power supply, through a DC-DC converter. The overcurrent protection device Adtc is electrically connected to the second bus chip K2. Signals collected by the main control unit BCMS can be transmitted through the second bus chip K2. For example, signals transmitted to the second bus chip K2 are transmitted to the host computer through a switching chip, so that the host computer can store and process the received signals.

[0039] Optionally, the main control unit BCMS also includes an interface circuit, which is electrically connected to the second bus chip K2. Specifically, the signals received by the second bus chip K2 can be transmitted to the bus through the interface circuit, enabling the bus to transmit signals from the main control unit BCMS to the display and control module BAMS.

[0040] Optionally, the slave control unit (BMU) includes a third bus chip K3 and an isolator. The isolator is used to transmit the signals acquired by the slave control unit (BMU) to the third bus chip K3.

[0041] For example, Figure 7 This is a structural block diagram of a slave control unit provided in an embodiment of the present invention. (Reference) Figure 7 The slave control unit (BMU) can detect the cell voltage and temperature in the electric vehicle battery pack through the acquisition and detection port. The signals acquired by the slave control unit (BMU) are transmitted to the third bus chip K3 via SPI communication through an isolator, which can prevent the port side signals from interfering with the third bus chip K3.

[0042] Optionally, there are multiple master control units (BCMS) and multiple slave control units (BMUs). The number of master control units (BCMS) is less than the number of slave control units (BMUs), and one master control unit (BCMS) corresponds to multiple slave control units (BMUs).

[0043] For details, please refer to Figure 4 Different master control units (BCMS) can control the charging and discharging of different battery packs. A battery pack contains multiple cells, and different slave control units (BMUs) can collect the voltage and current of different cells in the same battery pack. That is, the slave control units (BMUs) corresponding to the master control unit (BCMS) collect the voltage and current of different cells in the battery pack controlled by the master control unit (BCMS).

[0044] Optionally, there can be multiple slave control modules. For example, there can be four slave control modules, which can collect the voltage and current of more battery cells. The signals collected by each slave control module are transmitted to the display and control module BAMS through its own set AUTBUS bus.

[0045] It should be noted that the number of slave control modules, slave control units and master control units connected to one display and control module in this embodiment is only for illustrative purposes. The specific number can be set according to the actual energy storage application scenario, and is not limited here.

[0046] Optionally, the bus-based energy storage system is an energy storage system for the electric vehicle battery pack. This system can acquire signals and manage the electric vehicle battery pack. The bus-based energy storage system has a faster signal transmission rate, which can improve the control efficiency of the electric vehicle battery pack.

[0047] Optionally, the master control unit is electrically connected to the electric vehicle battery pack, and the slave control unit is electrically connected to the battery cells in the electric vehicle battery pack. Specifically, the master control unit can control the charging and discharging of the electric vehicle battery pack, and the slave control unit can collect the current and voltage signals of the battery cells in the electric vehicle battery pack, so that the bus energy storage system can control the electric vehicle battery pack according to the collected current and voltage signals.

[0048] The bus energy storage system provided in this embodiment is based on a two-layer architecture and uses the AUTBUS bus, which improves the communication bandwidth of the bus energy storage system, solves the bandwidth bottleneck of low-speed buses during large-scale data acquisition, and effectively improves the signal acquisition efficiency, signal transmission rate, and working efficiency of the bus energy storage system. Furthermore, the bus energy storage system is an energy storage system for electric vehicle battery packs. By acquiring signals and managing and controlling the electric vehicle battery pack, the bus energy storage system can improve the control efficiency of the electric vehicle battery pack. In the bus energy storage system provided in this embodiment, the master control unit is electrically connected to the electric vehicle battery pack, and the slave control unit is electrically connected to the cells in the electric vehicle battery pack. The master control unit can control the charging and discharging of the electric vehicle battery pack, and the slave control unit can acquire the current and voltage signals of the cells in the electric vehicle battery pack. The signals from the master control unit and the slave control unit are transmitted to the display and control module through the AUTBUS bus, so that the display and control module can control the electric vehicle battery pack according to the acquired current and voltage signals.

[0049] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A bus-based energy storage system, characterized in that, The bus energy storage system has a two-layer architecture. The bus energy storage system includes: a display and control module and at least one slave control module. The display and control module is located on the first layer of the two-layer architecture, and the at least one slave control module is located on the other layer of the two-layer architecture. The slave control module includes an AUTBUS bus, a master control unit, and at least one slave control unit. The display control module is electrically connected to the master control unit and the at least one slave control unit via the bus. The bus is used for signal transmission between the display control module and the master control unit, and for signal transmission between the display control module and the slave control unit. The slave control unit includes an isolator for transmitting signals acquired by the slave control unit. The display and control module includes a first bus chip and a controller. The controller is electrically connected to the first bus chip, and the first bus chip is electrically connected to the master control unit and the at least one slave control unit through the bus. The main control unit includes a second bus chip and a switching chip. The second bus chip is electrically connected to the switching chip, and the switching chip is used to transmit the signals of the second bus chip to the host computer. The slave control unit also includes a third bus chip, and the isolator is used to transmit the signals collected by the slave control unit to the third bus chip.

2. The bus energy storage system according to claim 1, characterized in that, The display and control module is equipped with a master station, and the slave control module is equipped with a slave station. The master station is electrically connected to the slave station through the bus.

3. The bus energy storage system according to claim 1, characterized in that, The main control unit also includes an interface circuit, which is electrically connected to the second bus chip.

4. The bus energy storage system according to claim 1, characterized in that, There are multiple master control units and multiple slave control units. The number of master control units is less than the number of slave control units. One master control unit corresponds to multiple slave control units.

5. The bus-based energy storage system according to claim 1, characterized in that, There are multiple slave control modules.

6. The bus energy storage system according to claim 1, characterized in that, The bus energy storage system is an energy storage system for electric vehicle battery packs.

7. The bus energy storage system according to claim 6, characterized in that, The main control unit is electrically connected to the electric vehicle battery pack, and the slave control unit is electrically connected to the battery cells in the electric vehicle battery pack.

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