Communication access circuit of energy storage equipment, communication access device and energy storage system

Abstract

The utility model relates to a communication access circuit of energy storage equipment, a communication access device and an energy storage system, the communication access circuit comprises a first communication access circuit and at least one second communication access circuit, and the second communication access circuit is connected between an internal unit of the energy storage equipment and a communication bus. The first communication access circuit adopts a cascade structure of a first conversion module, a second conversion module and an isolation module to realize signal conversion between external equipment and a communication bus. Wherein a first asynchronous transceiving signal transmitted between the isolation module and the first conversion module is electrically isolated from a second asynchronous transceiving signal transmitted between the isolation module and the second conversion module, and the transmission of a fault signal generated by external equipment to a communication bus is effectively blocked. Through the technical scheme provided by the invention, the technical problem that communication faults of part of external equipment can influence the overall working condition of the energy storage equipment in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of device communication, and in particular to a communication access circuit of an energy storage device, a communication access device and an energy storage system. BACKGROUND

[0002] At present, the energy storage system involves multiple devices, and when each external device is connected to the energy storage device, they communicate with each other based on a communication bus.

[0003] The working environment of some external devices connected to the energy storage device is relatively harsh, for example, oil engine devices usually work in outdoor scenes, and the port communication wire harness of these external devices with a relatively harsh working environment is prone to short circuit when communicating. In some possible scenarios, if the external device has a communication failure due to short circuit of the port communication wire harness when communicating, the communication bus of the energy storage device will be affected, and the internal unit of the energy storage device connected to the communication bus will also have a communication failure, resulting in that the entire energy storage device cannot communicate normally.

[0004] It can be seen that the communication failure of some external devices in the prior art will affect the overall working condition of the energy storage device. CONTENT OF THE INVENTION

[0005] The present application provides a communication access circuit of an energy storage device, a communication access device and an energy storage system to solve the technical problem that the communication failure of some external devices in the prior art will affect the overall working condition of the energy storage device.

[0006] In a first aspect, the present application provides a communication access circuit of an energy storage device, which comprises a first communication access circuit and at least one second communication access circuit, and the second communication access circuit is connected between an internal unit of the energy storage device and the communication bus.

[0007] The first communication access circuit comprises a first conversion module, a second conversion module and an isolation module, one end of the first conversion module is connected to an external device, the other end of the first conversion module is connected to one end of the isolation module, the other end of the isolation module is connected to one end of the second conversion module, and the other end of the second conversion module is connected to the communication bus.

[0008] The first conversion module transmits a first communication signal with the external device, the isolation module transmits a first asynchronous transceiving signal with the first conversion module, the isolation module transmits a second asynchronous transceiving signal with the second conversion module, and the second conversion module transmits a second communication signal with the communication bus.

[0009] The transmission rate of the first communication signal and the second communication signal is greater than the transmission rate of the first asynchronous transceiver signal, the second communication signal is electrically isolated from the first communication signal, and the first asynchronous transceiver signal is electrically isolated from the second asynchronous transceiver signal.

[0010] In an embodiment of the present application, the signal type of the first communication signal is a 485 signal type or a CAN signal type.

[0011] In an embodiment of the present application, the signal type of the second communication signal is a 485 signal type or a CAN signal type, and the signal type of the second communication signal, the signal type of the first communication signal, and the signal type supported by the communication bus are consistent.

[0012] In an embodiment of the present application, the signal type of the first communication signal is a 485 signal type, and the first conversion module includes a first UART converter chip.

[0013] The 485 signal transceiver end of the first UART converter chip is connected to the 485 signal transceiver end of the external device, the sending end of the first UART converter chip is connected to the first receiving end of the isolation module, and the receiving end of the first UART converter chip is connected to the first sending end of the isolation module.

[0014] In an embodiment of the present application, the signal type of the second communication signal is a CAN signal type, and the second conversion module includes a second UART converter chip.

[0015] The CAN signal transceiver end of the second UART converter chip is connected to the communication bus, the sending end of the second UART converter chip is connected to the second receiving end of the isolation module, and the receiving end of the second UART converter chip is connected to the second sending end of the isolation module.

[0016] In an embodiment of the present application, the isolation module includes a dual-channel digital isolator chip.

[0017] The first receiving end of the dual-channel digital isolator chip is connected to the sending end of the first UART converter chip, and the second receiving end of the dual-channel digital isolator chip is connected to the sending end of the second UART converter chip.

[0018] The first sending end of the dual-channel digital isolator chip is connected to the receiving end of the first UART converter chip, and the second sending end of the dual-channel digital isolator chip is connected to the receiving end of the second UART converter chip.

[0019] The first power supply end of the double-channel digital isolator chip is connected with a first external power supply, and the second power supply end of the double-channel digital isolator chip is connected with a second external power supply.

[0020] The ground end of the double-channel digital isolator chip is grounded.

[0021] In an embodiment of the present application, the isolation module further comprises a first resistor, a second resistor, a third resistor and a fourth resistor.

[0022] One end of the first resistor is connected with the first receiving end of the double-channel digital isolator chip, and the other end of the first resistor is connected with the transmitting end of the first UART converter chip.

[0023] One end of the second resistor is connected with the second receiving end of the double-channel digital isolator chip, and the other end of the second resistor is connected with the transmitting end of the second UART converter chip.

[0024] One end of the third resistor is connected with the first transmitting end of the double-channel digital isolator chip, and the other end of the third resistor is connected with the receiving end of the first UART converter chip.

[0025] One end of the fourth resistor is connected with the second transmitting end of the double-channel digital isolator chip, and the other end of the fourth resistor is connected with the receiving end of the second UART converter chip.

[0026] In an embodiment of the present application, the first resistor, the second resistor, the third resistor and the fourth resistor have the same resistance value.

[0027] In a second aspect, the present application provides a communication access device of an energy storage device, which comprises the communication access circuit according to any one of the embodiments of the first aspect.

[0028] In a third aspect, the present application provides an energy storage system, which comprises an external device and an energy storage device, wherein the energy storage device comprises the communication access device according to the second aspect, and communicates with the external device through the communication access device.

[0029] Compared with the prior art, the above technical solution provided by the embodiments of the present application has the following advantages:

[0030] The technical scheme provided in the embodiment of the application, when the external device is connected with the communication bus through the first communication access circuit, the internal unit of the energy storage device is connected with the communication bus through the second communication access circuit, the first asynchronous transceiving signal and the second asynchronous transceiving signal transmitted between the two ends of the isolation module are electrically isolated, and the first communication signal and the second communication signal are also electrically isolated. Through the technical scheme provided in the application, for the signal input by the external device, the signal is isolated from the signal received by the internal unit of the energy storage device based on the connected isolation module, so that even if the port communication wiring harness of the external device is short-circuited during communication, the communication bus cannot be affected, and the internal unit of the energy storage device cannot be affected, thereby solving the technical problem that the communication failure of part of the external device in the prior art affects the overall working condition of the energy storage device. BRIEF DESCRIPTION OF DRAWINGS

[0031] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the application, and together with the specification, serve to explain the principles of the application.

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor under the premise of not paying creative labor.

[0033] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments, and the elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, and the drawings do not constitute a proportional limitation.

[0034] Figure 1 A structural schematic diagram of a communication access circuit of an energy storage device provided by the embodiment of the application;

[0035] Figure 2 A structural schematic diagram of a first conversion module of a communication access circuit of an energy storage device provided by the embodiment of the application;

[0036] Figure 3 A structural schematic diagram of a second conversion module of a communication access circuit of an energy storage device provided by the embodiment of the application;

[0037] Figure 4 A connection schematic diagram of a communication access circuit of an energy storage device provided by the embodiment of the application;

[0038] Figure 5 A structural schematic diagram of a communication access device of an energy storage device provided by the embodiment of the application;

[0039] Figure 6 A structural schematic diagram of an energy storage system provided by an embodiment of the present application is provided.

[0040] Explanation of reference signs:

[0041] 1, first communication access circuit; 2, second communication access circuit; 11, first conversion module; 12, second conversion module; 13, isolation module; U1, first UART converter chip; U2, second UART converter chip; U3, dual-channel digital isolator chip; u1, first external power supply; u2, second external power supply; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity and clarity, the description of the specific examples in the following text will be described. Of course, they are only examples, and the purpose is not to limit the present application. In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed.

[0044] In order to solve the technical problem that the communication failure of part of external devices will affect the overall working condition of the energy storage device in the prior art, the present application provides a communication access circuit of an energy storage device, a communication access device and an energy storage system, which can avoid the influence of the communication failure of external devices on the overall working condition of the energy storage device.

[0045] Figure 1 A structural schematic diagram of a communication access circuit of an energy storage device provided by an embodiment of the present application is provided with reference to Figure 1 The communication access circuit comprises a first communication access circuit 1 and at least one second communication access circuit 2, and the second communication access circuit 2 is connected between the internal unit of the energy storage device and the communication bus;

[0046] The first communication access circuit 1 comprises a first conversion module 11, a second conversion module 12 and an isolation module 13. One end of the first conversion module 11 is connected to an external device. The other end of the first conversion module 11 is connected to one end of the isolation module 13. The other end of the isolation module 13 is connected to one end of the second conversion module 12. The other end of the second conversion module 12 is connected to a communication bus.

[0047] The first conversion module 11 transmits a first communication signal with the external device. The isolation module 13 transmits a first asynchronous transceiving signal with the first conversion module 11. The isolation module 13 transmits a second asynchronous transceiving signal with the second conversion module 12. The second conversion module 12 transmits a second communication signal with the communication bus.

[0048] The transmission rate of the first communication signal and the second communication signal is greater than the transmission rate of the first asynchronous transceiving signal. The second communication signal is electrically isolated from the first communication signal. The first asynchronous transceiving signal is electrically isolated from the second asynchronous transceiving signal.

[0049] Specifically, the communication access circuit of the energy storage device can be applied to the energy storage device. The communication access circuit can be arranged at the connection between the energy storage device and the external device.

[0050] The energy storage device comprises a plurality of internal units. The internal units communicate with each other through a communication bus. As a specific example, the energy storage device can be an outdoor energy storage battery, an outdoor refrigerator, an outdoor air conditioner or the like. The internal units of the energy storage device can be energy storage units, control units, management units or the like.

[0051] The external device is additionally connected to the energy storage device to realize energy storage, power generation, interaction and the like. The external device is connected to the energy storage device through the communication access circuit to realize the above functions. As a specific example, the external device can be an oil machine (diesel generator), a photovoltaic device, a display interaction device or the like.

[0052] The communication access circuit comprises a first communication access circuit 1. The first communication access circuit 1 is connected between the external device and the communication bus. The first communication access circuit 1 comprises a first conversion module 11, a second conversion module 12 and an isolation module 13. The first conversion module 11 and the second conversion module 12 are connected to the isolation module 13. A first asynchronous transceiving signal is transmitted between the first conversion module 11 and the isolation module 13. A second asynchronous transceiving signal is transmitted between the second conversion module 12 and the isolation module 13. The first asynchronous transceiving signal is electrically isolated from the second asynchronous transceiving signal.

[0053] The signal type of the first asynchronous transceiving signal and the second asynchronous transceiving signal is a UART type (Universal Asynchronous Receiver / Transmitter).

[0054] The isolation module 13 can realize electrical isolation between the first asynchronous transceiving signal and the second asynchronous transceiving signal. It can be understood that, since the isolation module 13 realizes electrical isolation between the first asynchronous transceiving signal and the second asynchronous transceiving signal, a communication failure generated by a module or a device before the isolation module 13 (i.e., the first conversion module 11 and the external device) will not affect a module or a device after the isolation module 13 (i.e., the second conversion module 12 and the communication bus).

[0055] Based on the technical solution provided in the above embodiment, if a short circuit occurs in the port communication wire harness when the external device is communicating at this time, the overload current or signal generated by the error will be terminated at the isolation module 13, and the module or the device after the isolation module 13 will not fail due to the overload current or the signal. It can be seen that, by using the technical solution provided in the present application, the technical problem that the communication failure of some external devices in the prior art affects the overall working condition of the energy storage device is solved.

[0056] The communication access circuit further comprises a second communication access circuit 2 connected between the internal unit of the energy storage device and the communication bus. The second communication access circuit 2 transmits a third communication signal between the internal unit of the energy storage device and the second communication access circuit 2. The second communication access circuit 2 is configured to convert between the second communication signal and the third communication signal. The third communication signal is a communication signal supported by the internal unit of the energy storage device.

[0057] Continuing to refer to Figure 1 , the other end of the first conversion module 11 is connected to the external device. The first communication signal is transmitted between the external device and the first conversion module 11. The first conversion module 11 is configured to convert the first communication signal into the first asynchronous transceiving signal. The signal type of the first communication signal is a 485 signal type or a CAN signal type.

[0058] Specifically, the protocol type of the communication protocol supported by the external device can be an RS-485 protocol type or a CAN protocol type. When the protocol type of the communication protocol supported by the external device is the RS-485 protocol type, the signal type of the first communication signal is the 485 signal type. When the protocol type of the communication protocol supported by the external device is the CAN protocol type, the signal type of the first communication signal is the CAN protocol type.

[0059] Based on this, the first conversion module 11 can convert a first communication signal of type 485 signal into a first asynchronous transceiver signal, and can also convert a first communication signal of type CAN signal into a first asynchronous transceiver signal. Therefore, regardless of the protocol type of the communication protocol supported by the external device, the communication access circuit of the energy storage device provided in this application embodiment can handle it, improving the adaptability of the communication access circuit of the energy storage device provided in this application embodiment to different external devices.

[0060] Continue to refer to Figure 1 The other end of the second conversion module 12 is connected to the communication bus. The second conversion device transmits a second communication signal with the communication bus. The second conversion module 12 is used to convert the second communication signal into a second asynchronous transceiver signal. The signal type of the second communication signal is either 485 signal type or CAN signal type. The signal type of the second communication signal, the signal type of the first communication signal, and the signal type supported by the communication bus are consistent.

[0061] Specifically, the signal types supported by the communication bus are adapted to the communication protocol types supported by the control motherboard of the energy storage device. The communication protocol types supported by the control motherboard can be RS-485 or CAN.

[0062] To ensure that the signals transmitted by external devices can be correctly configured or received by the control motherboard, the second conversion module 12 needs to convert the second asynchronous transceiver signal into a second communication signal that is consistent with the signal type supported by the communication bus.

[0063] Specifically, when the signal type supported by the communication bus is RS-485, the second conversion module 12 converts the second asynchronous transceiver signal into a second communication signal of RS-485 type; when the signal type supported by the communication bus is CAN type, the second conversion module 12 converts the second asynchronous transceiver signal into a second communication signal of CAN type.

[0064] Furthermore, to ensure normal communication between external devices and the control motherboard, the signal types of the second communication signal, the first communication signal, and the signals supported by the communication bus are consistent. Specifically, if the control motherboard supports RS-485, both the first and second communication signals will be RS-485; if the control motherboard supports CAN, both the first and second communication signals will be CAN.

[0065] Figure 2This is a schematic diagram of the structure of the first conversion module 11 in the communication access circuit of an energy storage device provided in an embodiment of this application, with reference to... Figure 2 In one feasible embodiment of this application, the signal type of the first communication signal is 485 signal type, and the first conversion module 11 includes a first UART converter chip U1;

[0066] The 485 signal transceiver terminal of the first UART converter chip U1 is connected to the 485 signal transceiver terminal of the external device, the transmitting terminal of the first UART converter chip U1 is connected to the first receiving terminal of the isolation module 13, and the receiving terminal of the first UART converter chip U1 is connected to the first transmitting terminal of the isolation module 13.

[0067] Specifically, the first conversion module 11 includes a first UART converter chip U1, which includes a 485 signal transceiver terminal (as shown in 485_A2 and 485_B2 in the figure), a transmitter (as shown in 485_TX1 in the figure) and a receiver (as shown in 485_RX1 in the figure).

[0068] When an external device sends a signal to the internal unit of the energy storage device, the 485 signal transceiver terminal of the first UART converter chip U1 receives the first communication signal from the 485 signal transceiver terminal of the external device (as shown in 485_A1 and 485_B1 in the figure). The first communication signal is an RS-485 signal represented by high and low levels. The first UART converter chip U1 processes the first communication signal, converts the first communication signal into a first asynchronous transceiver signal, and then sends the first asynchronous transceiver signal to the isolation module 13 through the transmitting end.

[0069] When the internal unit of the energy storage device sends a signal to the external device, the receiving end of the first UART converter chip U1 receives the first asynchronous transceiver signal from the isolation module 13. The first UART converter chip U1 processes the first asynchronous transceiver signal and converts it into an RS-485 signal that represents high and low levels. In other words, the first asynchronous transceiver signal is converted into a first communication signal, and then the first communication signal is sent to the external device through the 485 signal transceiver terminal.

[0070] As a specific example, the chip model of the first UART converter chip U1 includes, but is not limited to, MAX14830, SP3485, etc.

[0071] Figure 3 This is a schematic diagram of the second conversion module 12 in the communication access circuit of an energy storage device provided in an embodiment of this application, with reference to... Figure 3In one feasible embodiment of this application, the signal type of the second communication signal is a CAN signal type, and the second conversion module 12 includes a second UART converter chip U2;

[0072] The CAN signal transceiver terminal of the second UART converter chip U2 is connected to the communication bus, the transmitting terminal of the second UART converter chip U2 is connected to the second receiving terminal of the isolation module 13, and the receiving terminal of the second UART converter chip U2 is connected to the second transmitting terminal of the isolation module 13.

[0073] Specifically, the second conversion module 12 includes a second UART converter chip U2, which includes a CAN signal transceiver end (as shown in CAN_L1 and CAN_H1 in the figure), a transmitter end (as shown in CAN_TX1 in the figure) and a receiver end (as shown in CAN_RX1 in the figure).

[0074] When an external device sends a signal to the internal unit of the energy storage device, the receiving end of the second UART converter chip U2 receives the second asynchronous transceiver signal from the isolation module 13. The second UART converter chip U2 processes the second asynchronous transceiver signal and converts it into a CAN signal, that is, converts the second asynchronous transceiver signal into a second communication signal, and then sends the second communication signal to the communication bus through the CAN signal transceiver end.

[0075] When the internal unit of the energy storage device sends a signal to the external device, the CAN signal transceiver of the second UART converter chip U2 receives the second communication signal from the communication bus. The second communication signal is a CAN signal. The second UART converter chip U2 processes the second communication signal, converts the second communication signal into a second asynchronous transceiver signal, and then sends the second asynchronous transceiver signal to the isolation module 13 through the transmitting end.

[0076] As a specific example, the chip model of the second UART converter chip U2 includes, but is not limited to, MAX14830, SP3485, etc.

[0077] Figure 4 This is a connection diagram of a communication access circuit for an energy storage device provided in an embodiment of this application. In a feasible embodiment of this application, the isolation module 13 includes a dual-channel digital isolator chip U3.

[0078] The first receiving end of the dual-channel digital isolator chip U3 is connected to the transmitting end of the first UART converter chip U1, and the second receiving end of the dual-channel digital isolator chip U3 is connected to the transmitting end of the second UART converter chip U2.

[0079] The first transmitting end of the dual-channel digital isolator chip U3 is connected to the receiving end of the first UART converter chip U1, and the second transmitting end of the dual-channel digital isolator chip U3 is connected to the receiving end of the second UART converter chip U2.

[0080] The first power supply terminal of the dual-channel digital isolator chip U3 is connected to the first external power supply u1, and the second power supply terminal of the dual-channel digital isolator chip U3 is connected to the second external power supply u2.

[0081] The grounding terminal of the dual-channel digital isolator chip U3 is grounded.

[0082] Specifically, taking the first and second communication signals as both being RS-485 type, the dual-channel digital isolator chip U3 includes a first receiver (as shown in UART_RX1 in the figure), a second receiver (as shown in UART_RX2 in the figure), a first transmitter (as shown in UART_TX1 in the figure), a second transmitter (as shown in UART_TX2 in the figure), a first power supply terminal (as shown in VCC1 in the figure), a second power supply terminal (as shown in VCC2 in the figure), and a ground terminal (as shown in GND in the figure).

[0083] The dual-channel digital isolator chip U3 enables the mutual conversion between the first asynchronous transmit / receive signal and the second asynchronous transmit / receive signal. The dual-channel digital isolator chip U3 achieves electrical isolation between the first asynchronous transmit / receive signal and the second asynchronous transmit / receive signal based on principles such as optocoupler, magnetic coupling, or capacitive coupling.

[0084] When an external device sends a signal to the internal unit of the energy storage device, the first receiving end of the dual-channel digital isolator chip U3 receives the first asynchronous transmit / receive signal from the first UART converter chip U1. The dual-channel digital isolator chip U3 processes the first asynchronous transmit / receive signal, converts it into a second asynchronous transmit / receive signal, and then sends the second asynchronous transmit / receive signal to the second UART converter chip U2 through the second transmitting end of the dual-channel digital isolator chip U3.

[0085] When the internal unit of the energy storage device sends a signal to the external device, the second receiving end of the dual-channel digital isolator chip U3 receives the second asynchronous transmit / receive signal from the second UART converter chip U2. The dual-channel digital isolator chip U3 processes the second asynchronous transmit / receive signal, converts the second asynchronous transmit / receive signal into a first asynchronous transmit / receive signal, and then sends the first asynchronous transmit / receive signal to the first UART converter chip U1 through the first transmitting end of the dual-channel digital isolator chip U3.

[0086] As a specific example, the dual-channel digital isolator chip U3 may be NIRS21N1-DSPR. The power supply terminal of the dual-channel digital isolator chip U3 is connected to a first external power supply u1 with a voltage of 3.3V, and the second power supply terminal of the dual-channel digital isolator chip U3 is connected to a second external power supply u2 with a voltage of 3.3V.

[0087] To ensure the reliability of isolation module 13, reduce signal reflection, and improve signal transmission quality, continue to refer to... Figure 4 In one feasible embodiment of this application, the isolation module 13 further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.

[0088] One end of the first resistor R1 is connected to the first receiving end of the dual-channel digital isolator chip U3, and the other end of the first resistor R1 is connected to the transmitting end of the first UART converter chip U1.

[0089] One end of the second resistor R2 is connected to the second receiving end of the dual-channel digital isolator chip U3, and the other end of the second resistor R2 is connected to the transmitting end of the second UART converter chip U2.

[0090] One end of the third resistor R3 is connected to the first transmitting end of the dual-channel digital isolator chip U3, and the other end of the third resistor R3 is connected to the receiving end of the first UART converter chip U1.

[0091] One end of the fourth resistor R4 is connected to the second transmitting end of the dual-channel digital isolator chip U3, and the other end of the fourth resistor R4 is connected to the receiving end of the second UART converter chip U2.

[0092] To ensure the symmetry and balance between the first asynchronous transmit / receive signal and the second asynchronous transmit / receive signal, and to maintain the consistency of the amplitude and shape of the first asynchronous transmit / receive signal and the second asynchronous transmit / receive signal on the transmission path, in a feasible embodiment of this application, the resistance values ​​of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are the same.

[0093] As a specific example, the resistance values ​​of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are all set to 100Ω.

[0094] Figure 5 This is a schematic diagram of the structure of a communication access device for an energy storage device provided in an embodiment of this application, with reference to... Figure 5 This application also provides a communication access device for an energy storage device, which includes the communication access circuit described in any of the above embodiments.

[0095] Figure 6This is a schematic diagram of the structure of an energy storage system provided in an embodiment of this application, with reference to... Figure 6 This application also provides an energy storage system, which includes external devices and energy storage devices. The energy storage devices include a communication access device as described in the above device embodiments, and communicate with the external devices through the communication access device.

[0096] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0097] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A communication access circuit for an energy storage device, characterized in that: The communication access circuit includes a first communication access circuit and at least one second communication access circuit, wherein the second communication access circuit is connected between the internal unit of the energy storage device and the communication bus. The first communication access circuit includes a first conversion module, a second conversion module, and an isolation module. One end of the first conversion module is connected to an external device, the other end of the first conversion module is connected to one end of the isolation module, the other end of the isolation module is connected to one end of the second conversion module, and the other end of the second conversion module is connected to the communication bus. The first conversion module transmits a first communication signal with the external device, the isolation module transmits a first asynchronous transmit / receive signal with the first conversion module, the isolation module transmits a second asynchronous transmit / receive signal with the second conversion module, and the second conversion module transmits a second communication signal with the communication bus. The transmission rates of the first communication signal and the second communication signal are both greater than the transmission rate of the first asynchronous transceiver signal. The second communication signal is electrically isolated from the first communication signal, and the first asynchronous transceiver signal is electrically isolated from the second asynchronous transceiver signal.

2. The communication access circuit according to claim 1, characterized in that, The first communication signal is of type 485 or CAN.

3. The communication access circuit according to claim 2, characterized in that, The signal type of the second communication signal is either 485 or CAN, and the signal type of the second communication signal, the signal type of the first communication signal, and the signal type supported by the communication bus are consistent.

4. The communication access circuit according to claim 2, characterized in that, The first communication signal is of type 485, and the first conversion module includes a first UART converter chip; The 485 signal transceiver terminal of the first UART converter chip is connected to the 485 signal transceiver terminal of the external device, the transmitting terminal of the first UART converter chip is connected to the first receiving terminal of the isolation module, and the receiving terminal of the first UART converter chip is connected to the first transmitting terminal of the isolation module.

5. The communication access circuit according to claim 2, characterized in that, The second communication signal is a CAN signal, and the second conversion module includes a second UART converter chip; The CAN signal transceiver terminal of the second UART converter chip is connected to the communication bus, the transmitting terminal of the second UART converter chip is connected to the second receiving terminal of the isolation module, and the receiving terminal of the second UART converter chip is connected to the second transmitting terminal of the isolation module.

6. The communication access circuit according to claim 4 or 5, characterized in that, The isolation module includes a dual-channel digital isolator chip; The first receiving end of the dual-channel digital isolator chip is connected to the transmitting end of the first UART converter chip, and the second receiving end of the dual-channel digital isolator chip is connected to the transmitting end of the second UART converter chip. The first transmitting end of the dual-channel digital isolator chip is connected to the receiving end of the first UART converter chip, and the second transmitting end of the dual-channel digital isolator chip is connected to the receiving end of the second UART converter chip. The first power supply terminal of the dual-channel digital isolator chip is connected to a first external power supply, and the second power supply terminal of the dual-channel digital isolator chip is connected to a second external power supply. The ground terminal of the dual-channel digital isolator chip is grounded.

7. The communication access circuit according to claim 6, characterized in that, The isolation module also includes a first resistor, a second resistor, a third resistor, and a fourth resistor; One end of the first resistor is connected to the first receiving end of the dual-channel digital isolator chip, and the other end of the first resistor is connected to the transmitting end of the first UART converter chip. One end of the second resistor is connected to the second receiving end of the dual-channel digital isolator chip, and the other end of the second resistor is connected to the transmitting end of the second UART converter chip. One end of the third resistor is connected to the first transmitting end of the dual-channel digital isolator chip, and the other end of the third resistor is connected to the receiving end of the first UART converter chip. One end of the fourth resistor is connected to the second transmitting end of the dual-channel digital isolator chip, and the other end of the fourth resistor is connected to the receiving end of the second UART converter chip.

8. The communication access circuit according to claim 7, characterized in that, The first resistor, the second resistor, the third resistor, and the fourth resistor have the same resistance value.

9. A communication access device for an energy storage device, characterized in that, The communication access device includes the communication access circuit as described in any one of claims 1-8.

10. An energy storage system, characterized in that, The energy storage system includes external devices and energy storage devices. The energy storage devices include the communication access device as described in claim 9, and communicate with the external devices through the communication access device.

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