Capacity expansion communication conversion system and energy storage management system of energy storage battery pack

Abstract

The embodiment of the utility model discloses a capacity expansion communication conversion system and an energy storage management system of an energy storage battery pack. The capacity expansion communication conversion system of the energy storage battery pack comprises n energy storage battery packs, a first communication conversion module, a communication conversion module and a second communication conversion module, wherein n is an integer greater than or equal to 2; the n energy storage battery packs send respective CAN messages to the first communication conversion module, and the first communication conversion module sends the received CAN messages to the communication conversion module; the communication conversion module carries out data summarization processing on the CAN message and transmits a corresponding communication protocol message to the second communication conversion module, and the second communication conversion module carries out communication interaction with the inverter. According to the utility model, the energy storage battery packs of different versions and models can be connected in parallel and flexibly combined, so that the capacity expansion of the battery is more convenient and efficient, the efficiency is greatly improved, and the user experience is improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of battery communication technology, and in particular to a capacity expansion communication conversion system and an energy storage management system for an energy storage battery pack. Background Art

[0002] In the existing technology, energy storage battery packs of different versions and models cannot be used in parallel, cannot meet people's usage needs, and have limitations. Utility Model Content

[0003] The utility model provides an expansion communication conversion system and an energy storage management system for an energy storage battery pack, which solves the problem that energy storage battery packs of different versions and models cannot be used in parallel, cannot meet people's usage needs, and have limitations. The utility model realizes the parallel connection and flexible combination of energy storage battery packs of different versions and models, making battery expansion more convenient and efficient, greatly improving efficiency, and enhancing user experience.

[0004] According to one aspect of the present invention, a capacity expansion communication conversion system for an energy storage battery pack is provided, the capacity expansion communication conversion system for an energy storage battery pack comprising: n energy storage battery packs, a first communication conversion module, a communication conversion module, and a second communication conversion module, wherein n is an integer greater than or equal to 2;

[0005] The n energy storage battery packs are connected to the first communication conversion module, the first communication conversion module is connected to the communication conversion module, the n energy storage battery packs are used to send their respective CAN messages to the first communication conversion module, and the first communication conversion module is used to send the received CAN messages to the communication conversion module;

[0006] The communication conversion module is connected to the second communication conversion module, and the second communication conversion module is connected to the inverter. The communication conversion module is used to perform data aggregation processing on the CAN message and transmit the corresponding communication protocol message to the second communication conversion module. The second communication conversion module is used to communicate and interact with the inverter.

[0007] Optionally, the value of n is 4.

[0008] Optionally, the communication conversion module includes: a microcontroller in a communication conversion box.

[0009] Optionally, the first communication conversion module includes: a CAN chip at the battery end in the communication conversion box.

[0010] Optionally, the second communication conversion module includes: a CAN chip at the inverter end in the communication conversion box or a 485 chip at the inverter end in the communication conversion box.

[0011] Optionally, the first communication conversion module, the communication conversion module and the second communication conversion module are integrated in the same communication conversion box.

[0012] Optionally, the n energy storage battery packs and the first communication conversion module communicate via a CAN communication protocol.

[0013] Optionally, the second communication conversion module and the inverter communicate via RS485 communication protocol or CAN communication protocol.

[0014] Optionally, the energy storage battery pack is a lithium battery.

[0015] According to another aspect of the present invention, an energy storage management system is provided, which includes the capacity expansion communication conversion system of the energy storage battery pack and the inverter described in any one of the above aspects, and the connection between the inverter and the capacity expansion communication conversion system of the energy storage battery pack.

[0016] The technical solution of the embodiment of the present utility model is to identify the messages sent by energy storage battery packs of different versions and models through the communication conversion module to perform data aggregation processing and transmit the corresponding communication protocol messages, and then communicate and interact with the external inverter; the energy storage battery packs of different versions and models can be flexibly expanded and used in parallel, with the characteristics of wide compatibility, flexibility and convenience, cost reduction and efficiency improvement; it is more efficient and convenient, increases the wide range of use of energy storage batteries, reduces costs, and improves efficiency and user experience. In summary, the utility model solves the problem of the existing technology that different versions and models of energy storage battery packs cannot be used in parallel, cannot meet people's usage needs, and have limitations.

[0017] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of a capacity expansion communication conversion system for an energy storage battery pack provided according to an embodiment of the present utility model;

[0020] Figure 2This is a structural diagram of another capacity expansion communication conversion system for an energy storage battery pack provided according to an embodiment of the present utility model;

[0021] Figure 3 This is a working principle diagram of a capacity expansion communication conversion system provided according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] Figure 1 This is a schematic diagram of a capacity expansion communication conversion system for an energy storage battery pack according to an embodiment of the present invention, with reference to Figure 1 An embodiment of the present invention provides a capacity expansion communication conversion system for an energy storage battery pack, the capacity expansion communication conversion system for an energy storage battery pack comprising: n energy storage battery packs 10, a first communication conversion module 20, a communication conversion module 30, and a second communication conversion module 40, where n is an integer greater than or equal to 2;

[0025] The n energy storage battery packs 10 are connected to the first communication conversion module 20, which is connected to the communication conversion module 30. The n energy storage battery packs 10 are used to send their respective CAN messages to the first communication conversion module 20, and the first communication conversion module 20 is used to send the received CAN messages to the communication conversion module 30;

[0026] The communication conversion module 30 is connected to the second communication conversion module 40, and the second communication conversion module 40 is connected to the inverter. The communication conversion module 30 is used to perform data aggregation processing on the CAN message and transmit the corresponding communication protocol message to the second communication conversion module 40, and the second communication conversion module 40 is used to communicate and interact with the inverter.

[0027] Specifically, the type A energy storage battery pack in the energy storage battery pack 10 sends a CAN message through its own host (main BMS), and the type B energy storage battery pack in the energy storage battery pack 10 sends a CAN message through its own host, and both are sent to the first communication conversion module 20, which transmits the data to the communication conversion module 30 for data aggregation processing.

[0028] If the data is normal, the communication conversion module 30 directly transmits it to the second communication conversion module 40, which selects the appropriate communication protocol based on the inverter communication type. The communication conversion module 30 can identify data packets sent by the energy storage battery pack 10 using different communication protocols and automatically respond to and reply to the corresponding data packets, enabling communication between the energy storage battery pack 10 and the inverter.

[0029] When a data alarm occurs: the communication conversion module 30 will display the alarm information through the light status, and the corresponding communication protocol message transmitted by the communication conversion module 30 will also send an alarm flag to the second communication conversion module 40, and then transmit it to the inverter.

[0030] The communication conversion module 30 can identify messages sent by different versions of the energy storage battery pack 10, aggregate and process the data, and transmit the corresponding communication protocol messages. The communication conversion module 30 is compatible with the communication protocols of different inverters and can automatically respond and reply to the corresponding communication protocol messages based on the messages sent by the external inverter. This eliminates the need to disassemble the battery system to set the DIP switch, making it very convenient and quick.

[0031] The technical solution of the embodiment of the present utility model is to identify the messages sent by energy storage battery packs of different versions and models through the communication conversion module to perform data aggregation processing and transmit the corresponding communication protocol messages, and then communicate and interact with the external inverter; the energy storage battery packs of different versions and models can be flexibly expanded and used in parallel, with the characteristics of wide compatibility, flexibility and convenience, cost reduction and efficiency improvement; it is more efficient and convenient, increases the wide range of use of energy storage batteries, reduces costs, and improves efficiency and user experience. In summary, the utility model solves the problem of the existing technology that different versions and models of energy storage battery packs cannot be used in parallel, cannot meet people's usage needs, and have limitations.

[0032] Optionally, the value of n is 4.

[0033] Specifically, up to four energy storage battery packs A, B, C, and D can be connected.

[0034] Figure 2 This is a structural diagram of another energy storage battery pack expansion communication conversion system provided according to an embodiment of the present utility model, with reference to Figure 1 and Figure 2 Optionally, the communication conversion module 30 includes: a microcontroller in the communication conversion box.

[0035] Continue to refer Figure 1 and Figure 2 Optionally, the first communication conversion module 20 includes: a CAN chip at the battery end in the communication conversion box.

[0036] Continue to refer Figure 1 and Figure 2 Optionally, the second communication conversion module 40 includes: a CAN chip at the inverter end in the communication conversion box or a 485 chip at the inverter end in the communication conversion box.

[0037] Figure 3 This is a working principle diagram of a capacity expansion communication conversion system provided according to an embodiment of the present utility model, referring to Figure 3 , Type A energy storage battery pack sends CAN messages through its own host, and Type B energy storage battery pack sends CAN messages through its own host, and they are sent together to the CAN chip at the battery end (Battery, BAT) in the communication conversion box. The CAN chip at the battery end in the communication conversion box transmits the data to the microcontroller unit (Microcontroller Unit, MCU) in the communication conversion box for data aggregation and processing.

[0038] When the data is normal: the MCU in the communication conversion box will directly transmit it to the CAN chip on the inverter (INV) side in the communication conversion box or the 485 chip on the inverter side in the communication conversion box, and select the appropriate communication protocol for interaction according to the communication type of the inverter.

[0039] When data alarm occurs: the MCU in the communication conversion box will display the alarm information through the light status, and the corresponding communication protocol message transmitted by the MCU in the communication conversion box will also send an alarm flag to the inverter-side CAN chip in the communication conversion box or the inverter-side 485 chip in the communication conversion box, and then transmit it to the external inverter.

[0040] Optionally, the energy storage battery pack is a lithium battery.

[0041] Optionally, the first communication conversion module, the communication conversion module and the second communication conversion module are integrated in the same communication conversion box.

[0042] Specifically, the communication conversion box identifies the messages sent by lithium batteries of different versions of BMS, performs data aggregation and processing, and transmits the corresponding communication protocol messages, thereby realizing flexible expansion and parallel use of lithium batteries of different versions of BMS.

[0043] Optionally, the n energy storage battery packs and the first communication conversion module communicate via a CAN communication protocol.

[0044] Optionally, the second communication conversion module and the inverter communicate via RS485 communication protocol or CAN communication protocol.

[0045] Specifically, the communication within the expansion communication conversion system of the energy storage battery pack is based on the CAN communication protocol, using standard frames, a rate of 500kbps, and a data transmission cycle of 1s.

[0046] An embodiment of the present invention further provides an energy storage management system, which includes the capacity expansion communication conversion system of the energy storage battery pack and the inverter provided in any embodiment of the present invention, and the connection between the inverter and the capacity expansion communication conversion system of the energy storage battery pack.

[0047] Specifically, an inverter is a converter that converts DC power (energy storage battery pack, storage battery) into constant frequency and constant voltage or frequency and voltage adjustable AC power (usually 220V, 50Hz sine wave).

[0048] Since the energy storage management system includes the capacity expansion communication conversion system of the energy storage battery pack provided by any embodiment of the present invention, the beneficial effects of the above energy storage management system and the capacity expansion communication conversion system of the energy storage battery pack are the same and will not be repeated here.

[0049] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

Claims

1. A capacity expansion communication conversion system for an energy storage battery pack, characterized in that: include: n energy storage battery packs, a first communication conversion module, a communication conversion module, and a second communication conversion module, where n is an integer greater than or equal to 2; The n energy storage battery packs are connected to the first communication conversion module, the first communication conversion module is connected to the communication conversion module, the n energy storage battery packs are used to send their respective CAN messages to the first communication conversion module, and the first communication conversion module is used to send the received CAN messages to the communication conversion module; The communication conversion module is connected to the second communication conversion module, and the second communication conversion module is connected to the inverter. The communication conversion module is used to perform data aggregation processing on the CAN message and transmit the corresponding communication protocol message to the second communication conversion module. The second communication conversion module is used to communicate and interact with the inverter.

2. The system according to claim 1, wherein: The value of n is 4.

3. The system according to claim 1, wherein: The communication conversion module includes: a microcontroller in a communication conversion box.

4. The system according to claim 1, wherein: The first communication conversion module includes: a CAN chip at the battery end in the communication conversion box.

5. The system according to claim 1, wherein: The second communication conversion module includes: a CAN chip at the inverter end in the communication conversion box or a 485 chip at the inverter end in the communication conversion box.

6. The system according to claim 1, wherein: The first communication conversion module, the second communication conversion module and the second communication conversion module are integrated into the same communication conversion box.

7. The system according to claim 1, wherein: The n energy storage battery packs communicate with the first communication conversion module via the CAN communication protocol.

8. The system according to claim 1, wherein: The second communication conversion module and the inverter communicate with each other via the RS485 communication protocol or the CAN communication protocol.

9. The system according to claim 1, wherein: The energy storage battery pack is a lithium battery.

10. An energy storage management system, characterized in that: It comprises the capacity expansion communication conversion system of the energy storage battery pack and the inverter according to any one of claims 1 to 9, and the connection between the inverter and the capacity expansion communication conversion system of the energy storage battery pack.

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