CN220773447U - CAN and 485 multiplexing communication protection circuit and energy storage system - Google Patents
CAN and 485 multiplexing communication protection circuit and energy storage system Download PDFInfo
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- CN220773447U CN220773447U CN202322731140.3U CN202322731140U CN220773447U CN 220773447 U CN220773447 U CN 220773447U CN 202322731140 U CN202322731140 U CN 202322731140U CN 220773447 U CN220773447 U CN 220773447U
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Abstract
The utility model discloses a CAN and 485 multiplexing communication protection circuit and an energy storage system, which comprise a communication selection logic control circuit, a channel change-over switch circuit, a CAN transceiver, a 485 transceiver, a digital isolator and an interference suppression circuit; one path of output pins of the communication selection logic control circuit is connected with the enabling pins of the channel change-over switch, and two paths of input pins are respectively connected into the internal gating and the external gating; a pair of serial input pins of the CAN transceiver and the 485 transceiver are respectively connected with two pairs of serial output pins of the communication selection logic control circuit, and the respective pair of serial output pins are connected in parallel with a pair of input pins of the digital isolator; a pair of output pins of the digital isolator are connected with the interference suppression circuit and output as two paths of isolated output ends. The utility model reduces the intensity of the interference introduced by the external communication port and improves the protection of the internal chip of the circuit while meeting the requirements of various communication modes of users.
Description
Technical Field
The utility model relates to the technical field of energy storage system communication, in particular to a CAN and 485 multiplexing communication protection circuit and an energy storage system.
Background
The current energy storage industry and technology are rapidly developed, the communication module is single in design, and one communication main board CAN only support CAN or 485 communication. If both communication modes are needed by the client, the system configures a plurality of hardware or when the client changes or increases one communication mode, the corresponding hardware needs to be changed or increased.
At present, an industrial personal computer which adopts an RS485 and CAN multiplexing communication mode to solve the problem of communication interface resources and multiplexes a path of serial port containing the function of a CAN controller from a controller is a common central controller of the energy storage system, but the multiplexing circuit of CAN and 485 in circuit design often has external impact, so that the CAN or 485 chip is damaged, and the system cannot normally operate.
Meanwhile, the current energy storage system is complex, impact voltage can occur in the use process of a plurality of electrical components, and when a communication port is not protected, a chip is often damaged and a communication module needs to be replaced.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the CAN and 485 multiplexing communication protection circuit and the energy storage system are provided, so that the intensity of interference introduced by an external communication port is reduced and the protection of an internal chip of the circuit is improved while the requirements of various communication modes of users are met.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a CAN and 485 multiplexing communication protection circuit comprises a communication selection logic control circuit, a channel change-over switch circuit, a CAN transceiver, a 485 transceiver, a digital isolator and an interference suppression circuit;
one path of output pin of the communication selection logic control circuit is connected with the enabling pin of the channel change-over switch, two paths of input pins are respectively connected into an internal gating and an external gating, and the internal gating and the external gating both comprise a CAN communication mode, a 485 communication mode and an unselected communication mode;
a pair of serial input pins of the CAN transceiver and the 485 transceiver are respectively connected with two pairs of serial output pins of the communication selection logic control circuit, and the respective pair of serial output pins are connected in parallel with a pair of input pins of the digital isolator;
and a pair of output pins of the digital isolator are connected with the interference suppression circuit and output as two paths of isolated output ends.
Further, the interference suppression circuit comprises four TVS bipolar diodes;
the four TVS bipolar diodes are connected in series in pairs to form two groups of TVS pipelines, one ends of the two groups of TVS pipelines are connected with the ground in parallel, and the other ends of the two groups of TVS pipelines are respectively connected with a pair of output pins of the digital isolator and lead out two paths of isolation output ends.
Further, the TVS bipolar diode is of a type PESD1CAN.
Further, the digital isolator comprises a controller workplace and a communication interface workplace;
the communication interface is operatively connected to one end of the TVS circuit of the interference suppression circuit, which is grounded.
Further, a pair of inductors are connected in series between a pair of output pins of the digital isolator and two paths of isolation output ends.
Further, the power supply selection logic control circuit is also included;
two paths of input pins of the power supply selection logic control circuit are respectively connected with an internal isolation power supply and an external isolation power supply;
one output pin of the power supply selection logic control circuit is connected with one power supply input pin of the digital isolator.
Further, the internal isolation power supply is 3.3V, and the external isolation power supply is 5V.
Further, a pair of serial input pins of the channel switching switch circuit are respectively connected with an external serial port.
In order to solve the technical problems, the utility model adopts another technical scheme that:
an energy storage system comprises a communication module, wherein the communication module adopts the communication protection circuit multiplexing CAN and 485.
The utility model has the beneficial effects that: the communication selection logic control circuit is used for carrying out mode selection to control the channel switching switch circuit to switch the corresponding CAN transceiver or 485 transceiver, so that a communication module accessed by an external communication port is correspondingly matched, the work of corresponding communication modes is carried out, the digital isolator and the interference suppression circuit are increased, the high-speed absorption of book new high energy impact generated when the communication mode is switched no matter CAN or 485 communication is used, the interference intensity introduced by the external communication port CAN be reduced, the circuit is protected from being damaged, and the protection of the internal chip of the circuit is improved while the requirements of various communication modes of users are met.
Drawings
FIG. 1 is a schematic circuit diagram of a communication protection circuit with multiplexing of CAN and 485 according to an embodiment of the utility model;
fig. 2 is a schematic circuit diagram of an RS485 communication circuit in a CAN and 485 multiplexing communication protection circuit according to an embodiment of the utility model.
Description of the reference numerals:
u1, a communication selection logic control circuit; u2, a channel switching circuit; u3, CAN transceiver; u4, 485 transceivers; u5, a digital isolator; u6, a power supply selection logic control circuit; u7, interference suppression circuit;
d1, TVS bipolar diode.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1, a communication protection circuit with multiplexing of CAN and 485 includes a communication selection logic control circuit, a channel switch circuit, a CAN transceiver, a 485 transceiver, a digital isolator and an interference suppression circuit;
one path of output pin of the communication selection logic control circuit is connected with the enabling pin of the channel change-over switch, two paths of input pins are respectively connected into an internal gating and an external gating, and the internal gating and the external gating both comprise a CAN communication mode, a 485 communication mode and an unselected communication mode;
a pair of serial input pins of the CAN transceiver and the 485 transceiver are respectively connected with two pairs of serial output pins of the communication selection logic control circuit, and the respective pair of serial output pins are connected in parallel with a pair of input pins of the digital isolator;
and a pair of output pins of the digital isolator are connected with the interference suppression circuit and output as two paths of isolated output ends.
From the above description, the beneficial effects of the utility model are as follows: the communication selection logic control circuit is used for carrying out mode selection to control the channel switching switch circuit to switch the corresponding CAN transceiver or 485 transceiver, so that a communication module accessed by an external communication port is correspondingly matched, the work of corresponding communication modes is carried out, the digital isolator and the interference suppression circuit are increased, the high-speed absorption of book new high energy impact generated when the communication mode is switched no matter CAN or 485 communication is used, the interference intensity introduced by the external communication port CAN be reduced, the circuit is protected from being damaged, and the protection of the internal chip of the circuit is improved while the requirements of various communication modes of users are met.
Further, the interference suppression circuit comprises four TVS bipolar diodes;
the four TVS bipolar diodes are connected in series in pairs to form two groups of TVS pipelines, one ends of the two groups of TVS pipelines are connected with the ground in parallel, and the other ends of the two groups of TVS pipelines are respectively connected with a pair of output pins of the digital isolator and lead out two paths of isolation output ends.
Further, the TVS bipolar diode is of a type PESD1CAN.
As can be seen from the above description, the interference suppression circuit is formed by four TVS bipolar diodes, and the TVS bipolar diodes are connected in parallel after being connected in series on two output ports of the digital isolator, so that when two ends of the TVS bipolar diodes are switched in communication mode, the TVS bipolar diodes can withstand instant high-energy impact and absorb the high-energy impact at an extremely high speed, and further, the communication circuit is not damaged due to electric shock on the circuit, and in addition, when the communication circuit is short-circuited, the TVS bipolar diodes can also effectively protect the whole circuit on the industrial personal computer of the energy storage system.
Further, the digital isolator comprises a controller workplace and a communication interface workplace;
the communication interface is operatively connected to one end of the TVS circuit of the interference suppression circuit, which is grounded.
As can be seen from the above description, the general digital isolator is formed by a primary side pin and a secondary side pin, wherein the primary side pin is a controller working ground GNDA, the secondary side pin is a communication interface working ground GNDB, and is used for transmitting differential communication signals, and certain isolation withstand voltage is provided between signal input and signal output, i.e. the communication interface working ground of the digital isolator is connected with one end of two groups of TVS pipelines of the interference suppression circuit, which is grounded, so that the GNDB has certain isolation withstand voltage to the GNDA, and interference such as surge and static at a port position is prevented from entering the controller working ground circuit.
Further, a pair of inductors are connected in series between a pair of output pins of the digital isolator and two paths of isolation output ends.
From the above description, the inductors are connected in series to make the output of the CAN and 485 serial signals more stable.
Further, the power supply selection logic control circuit is also included;
two paths of input pins of the power supply selection logic control circuit are respectively connected with an internal isolation power supply and an external isolation power supply;
one output pin of the power supply selection logic control circuit is connected with one power supply input pin of the digital isolator.
Further, the internal isolation power supply is 3.3V, and the external isolation power supply is 5V.
As CAN be seen from the above description, the power supply selection logic control circuit is added to select the power supply voltage of the communication circuit, so as to meet the work of the CAN or 485 chip with different models; the internal isolation power supply adopts 3.3V, the external isolation power supply adopts 5V, and the internal isolation power supply is two conventional power supply sources, so that the CAN or 485 chip with most models CAN be met.
Further, a pair of serial input pins of the channel switching switch circuit are respectively connected with an external serial port.
As CAN be seen from the above description, the pair of serial input pins on the channel switch circuit are used for being connected with an external serial port and for being externally connected with a CAN or 485 communication module, so as to satisfy the corresponding matching after the communication selection logic control circuit selects the communication mode.
An energy storage system comprises a communication module, wherein the communication module adopts the communication protection circuit multiplexing CAN and 485.
From the above description, the beneficial effects of the utility model are as follows: based on the unified technical conception, the CAN and 485 multiplexing communication protection circuit is adopted as a communication module of the energy storage system, and a CAN and 485 multiplexing communication circuit is formed by combining a communication selection logic control circuit, a channel switching switch circuit, a CAN transceiver, a 485 transceiver, a digital isolator and an interference suppression circuit, wherein the communication selection logic control circuit is used for carrying out mode selection, the channel switching switch circuit is controlled to switch the corresponding CAN transceiver or 485 transceiver, so that the communication module which is correspondingly matched with an external communication port for access is used for carrying out the work of corresponding communication modes, the digital isolator and the interference suppression circuit are added, so that the high-speed absorption of book new construction generated when the switching communication mode is carried out no matter the CAN or 485 communication is used, the intensity of the introduction of interference by the external communication port CAN be reduced, the protection circuit is not damaged, and the protection of the internal chip of the circuit is improved while the requirements of various communication modes of users are met.
The CAN and 485 multiplexing communication protection circuit provided by the utility model CAN meet the requirements of various communication modes of users, and meanwhile, improves the protection of chips inside the circuit, and is specifically described below with reference to the embodiment.
Referring to fig. 1, a first embodiment of the present utility model is as follows:
a CAN and 485 multiplexing communication protection circuit, as shown in figure 1, comprises a communication selection logic control circuit U1, a channel change-over switch circuit U2, a CAN transceiver U3, a 485 transceiver U4, a digital isolator U5 and an interference suppression circuit U7.
IN this embodiment, the internal gating and the external gating both include a CAN communication mode, a 485 communication mode and an unselected communication mode, and the communication selection logic control circuit U1 CAN select whether to use the CAN or 485 communication mode or not by the internal gating and the external gating, or CAN select a mode which does not perform communication, thereby realizing the multiplexing of the CAN and the 485 to the serial port channel from the controller; wherein the external strobe has a higher priority than the internal strobe.
And a pair of serial port input pins RX_IN/TX_IN of the communication switching circuit are respectively connected with an external serial port, namely connected with an externally accessed CAN communication module or an RS485 communication module, wherein the communication switching circuit matches the externally accessed module on the basis of internal gating and external gating of the communication selection logic control circuit U1, and then the corresponding communication mode is switched.
The pair of serial input pins RXD/TXD of the CAN transceiver U3 and 485 transceiver U4 are respectively connected with the two pairs of serial output pins rxb_out/txb_out and rxa_out/txa_out of the communication selection logic control circuit U1, and the respective pair of serial output pins CANL/CANH and 485B/485A are connected in parallel with the pair of input pins A1/A2 of the digital isolator U5. In this embodiment, the CAN transceiver U3 may convert the serial communication into CAN communication, and the 485 transceiver U4 may convert the serial communication into 485 communication.
The pair of output pins B1/B2 of the digital isolator U5 is connected with the interference suppression circuit U7 and outputs as two paths of isolated output ends CANH/485B and CANL/485A.
In this embodiment, the communication selection logic control circuit U1, the channel switching switch circuit U2, the CAN transceiver U3, the 485 transceiver U4, the digital isolator U5 and the interference suppression circuit U7 are adopted to form a communication circuit with multiplexing of CAN and 485, the communication selection logic control circuit U1 performs mode selection to control the channel switching switch circuit U2 to switch the corresponding CAN transceiver U3 or 485 transceiver U4, so as to correspondingly match a communication module accessed by an external communication port, perform work of a corresponding communication mode, and increase the digital isolator U5 and the interference suppression circuit U7, so that high-speed absorption CAN be performed on new book energy impact generated when switching communication modes no matter CAN be used or 485 communication is performed, and the strength of introducing interference to the external communication port CAN be reduced, thereby protecting the circuit from being damaged, and improving chip protection inside the circuit while meeting various communication mode requirements of users.
Referring to fig. 1, a second embodiment of the present utility model is as follows:
in the first embodiment, as shown in fig. 1, the interference suppression circuit U7 includes four TVS bipolar diodes D1.
In this embodiment, two TVS pipelines are formed by connecting four TVS bipolar diodes D1 in series, one ends of the two TVS pipelines are connected in parallel, and the other ends of the two TVS pipelines are respectively connected with a pair of output pins of the digital isolator U5 and lead out two isolated output ends, wherein the TVS bipolar diode D1 is of a type of PESD1CAN.
In this embodiment, the interference suppression circuit U7 is formed by four TVS bipolar diodes D1, and the two output ports of the digital isolator U5 are connected in parallel after being connected in series, so that when the two ends of the TVS bipolar diode D1 are switched in communication mode, the TVS bipolar diode D1can withstand instant high-energy impact and absorb at an extremely high speed, and further, the communication circuit is not damaged due to the electric shock on the circuit, and in addition, when the short circuit occurs on the communication circuit, the TVS bipolar diode D1can also effectively protect the whole circuit on the industrial personal computer of the energy storage system.
As shown in fig. 1, the digital isolator U5 includes a controller working ground GND and a communication interface working ground GNDB, and the communication interface working ground GNDB is connected to one end of the two groups of TVS circuits of the interference suppression circuit U7.
That is, the general digital isolator U5 may be formed by a primary side pin and a secondary side pin, where the primary side pin is a controller working ground GNDA, and the secondary side pin is a communication interface working ground GNDB, which is used for transmitting differential communication signals, and has a certain isolation withstand voltage between the signal input and the signal output, that is, the communication interface working ground of the digital isolator U5 is connected with one end of two groups of TVS pipelines of the interference suppression circuit U7, which is grounded, so that the GNDB has a certain isolation withstand voltage to the GNDA, and prevents the interference such as surging and static electricity at the port position from entering the controller working ground circuit.
In addition, in the embodiment, a pair of inductors are further connected in series between a pair of output pins BA/B2 of the digital isolator U5 and two paths of isolation output ends CANH/485B and CANL/485A, so that the output of CAN and 485 serial signals is more stable.
Referring to fig. 1 and 2, a third embodiment of the present utility model is as follows:
based on the second embodiment, the communication protection circuit with the multiplexing of the CAN and 485 further includes a power supply selection logic control circuit U6 as shown in fig. 1.
The two paths of input pins IN_B/IN_A of the power supply selection logic control circuit U6 are respectively connected with an internal isolation power supply and an external isolation power supply, and one path of output pin OUT of the power supply selection logic control circuit U6 is connected with a communication interface power supply input pin VCCB of the digital isolator U5, so that the power supply voltage of the communication circuit is selected, and the work of CAN or 485 chips of different types is met.
In the embodiment, the internal isolation power supply adopts 3.3V, the external isolation power supply adopts 5V, and the external isolation power supply is two conventional power supplies, so that the CAN or 485 chip with most models CAN be met.
In this embodiment, the communication selection operation of the energy storage system is performed mainly through two switches, namely a communication selection logic control circuit U1 and a power supply selection logic control circuit U6, and the steps are as follows:
firstly, the communication selection logic control circuit U1 selects an unselected communication mode by external gating, and selects a CAN communication mode or a 485 communication mode by internal gating (the priority CAN be changed according to the requirement of a customer); the power supply selection logic control circuit U6 selects either the internal isolated power supply 3.3V or the external isolated power supply 5V.
Then, how to make on-off selection in the operation process can be divided into two cases:
1. customer replacement equipment testing; 2. the communication state is required to be switched in the communication process.
The current state of the current factory equipment is established to be that the communication selection logic control circuit U1 selects a CAN communication mode, the power supply selection logic control circuit U6 selects an internal isolation power supply 3.3V, a customer needs to replace equipment and an energy storage system to test, the communication mode needs to be changed into a 485 communication mode, and the communication voltage is hoped to be increased to 5V. Before switching, a command CAN be sent to the energy storage system through the CAN, the communication mode is switched to a 485 communication mode based on a priority principle after the communication selection logic control short circuit receives an external command, the energy storage system simultaneously sends the command to the power supply selection logic control circuit U6, and the power supply selection logic control circuit U6 switches the original internal isolation power supply 3.3V to the external isolation power supply 5V so as to meet the communication requirement of external equipment.
Meanwhile, as shown in fig. 2, a schematic circuit diagram of an RS485 communication circuit is shown, and in this embodiment, a specific embodiment of the RS485 communication circuit is given.
The RS485 chip in fig. 2 is an 8pin max485 chip (U15), and the triode (Q38) in the circuit is an NPN triode, and the model is 2SC1623.
The resistors (R28 and R189) on TXD and RXD are pull-up resistors, the resistance values are respectively 4.7K, and TXD and RXD are both in high level when no data is received, so that the unstable levels of the TXD and RXD pins just powered on are prevented from causing the received disturbed data; meanwhile, the pull-down resistors R193 and R190 are respectively arranged on the pins RS485A and RS485B, the resistance is 4.7K, and the resistor is connected in parallel with a terminal resistor (R191) with the resistance of 120 omega, so that the device can be normally used for communication with an external controller and is not interfered.
The RS485A and the RS485B are respectively provided with an inductor which can filter signals (F2).
Two TVS tubes are connected in parallel on an RS485 output circuit port of the industrial personal computer, the TVS public ends are grounded, and the TVS tubes are of a PESD1 CAN/bipolar type. The protection design is as follows: when the two ends of the TVS tube are subjected to instant high-energy impact, the TVS can absorb at an extremely high speed, so that the communication circuit is prevented from being damaged due to the electric shock of outgoing lines on the circuit, and in addition, when the outgoing lines on the communication circuit are short-circuited, the TVS tube can also protect the communication circuit on the industrial personal computer from being damaged.
In this embodiment, the signal receiving and transmitting of the RS485 communication circuit are as follows:
and (3) signal receiving: when TXD is high level, a triode (Q38) is conducted, the RE pin of the MAX485 chip is enabled at low level, RO data receiving is effective, and at the moment, what data received from a 485AB port is transmitted to the MCU through an RO channel, so that the data receiving is completed;
and (3) signal transmission: when transmitting data, TXD will have a pull-down level to indicate that data transmission is to begin, and the transistor is turned off and DE is high. When the data is transmitted as "0", the data "0" is transmitted to the AB port at this time because the DI port is connected with the ground, A-B <0, and the data "0" is transmitted, and the low-level transmission is completed. When "1" is sent, the transistor (Q38) is turned on, and the MAX485 is in a high-impedance state in this state because it is still in the sending data, and the pull-down resistance (R190) of the pull-up resistor (R193) B on a determines that a-B >0 transmits "1", and the high-level transmission is completed.
The fourth embodiment of the utility model is as follows:
an energy storage system comprises a communication module, wherein the communication module adopts the CAN and 485 multiplexing communication protection circuit of any one of the first to third embodiments.
In this embodiment, based on a unified technical concept, the communication protection circuit with multiplexing CAN and 485 is adopted as a communication module of an energy storage system, and a communication selection logic control circuit, a channel switching switch circuit, a CAN transceiver, a 485 transceiver, a digital isolator and an interference suppression circuit are adopted to form a communication circuit with multiplexing CAN and 485 through circuit combination, the communication selection logic control circuit is used for carrying out mode selection to control the channel switching switch circuit to switch the corresponding CAN transceiver or 485 transceiver, so that the corresponding communication module accessed by an external communication port is correspondingly matched, the work of corresponding communication modes is carried out, the digital isolator and the interference suppression circuit are added, the high-speed absorption of the new high-energy impact generated when switching communication modes CAN be carried out no matter when the CAN or 485 communication is used, the interference intensity introduced by the external communication port CAN be reduced, the protection circuit is not damaged, and the protection of a chip inside the circuit is improved while the requirements of various communication modes of users are met.
In summary, the CAN and 485 multiplexing communication protection circuit and the energy storage system provided by the utility model have the following beneficial effects:
1. the method solves the problem of customer communication interface resources, can meet the requirements of various communication modes, and does not need to increase the material and time cost of hardware in the process of switching and increasing the communication modes.
2. An interference suppression circuit is added in the circuit, so that the intensity of interference introduced by an external communication port is further reduced; and the protection of chips inside the circuit is improved.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.
Claims (9)
1. The CAN and 485 multiplexing communication protection circuit is characterized by comprising a communication selection logic control circuit, a channel change-over switch circuit, a CAN transceiver, a 485 transceiver, a digital isolator and an interference suppression circuit;
one path of output pin of the communication selection logic control circuit is connected with the enabling pin of the channel change-over switch, two paths of input pins are respectively connected into an internal gating and an external gating, and the internal gating and the external gating both comprise a CAN communication mode, a 485 communication mode and an unselected communication mode;
a pair of serial input pins of the CAN transceiver and the 485 transceiver are respectively connected with two pairs of serial output pins of the communication selection logic control circuit, and the respective pair of serial output pins are connected in parallel with a pair of input pins of the digital isolator;
and a pair of output pins of the digital isolator are connected with the interference suppression circuit and output as two paths of isolated output ends.
2. The CAN and 485 multiplexed communication protection circuit of claim 1 wherein the interference suppression circuit comprises four TVS bipolar diodes;
the four TVS bipolar diodes are connected in series in pairs to form two groups of TVS pipelines, one ends of the two groups of TVS pipelines are connected with the ground in parallel, and the other ends of the two groups of TVS pipelines are respectively connected with a pair of output pins of the digital isolator and lead out two paths of isolation output ends.
3. The CAN and 485 multiplexed communication protection circuit of claim 2, wherein the TVS bipolar diode is of the type PESD1CAN.
4. The CAN and 485 multiplexed communication protection circuit of claim 2, wherein the digital isolator includes a controller workplace and a communication interface workplace;
the communication interface is operatively connected to one end of the TVS circuit of the interference suppression circuit, which is grounded.
5. The CAN and 485 multiplexed communication protection circuit of claim 2, wherein a pair of inductors are further connected in series between a pair of output pins of the digital isolator and two of the isolated output terminals.
6. The CAN and 485 multiplexed communication protection circuit of claim 1, further comprising a power select logic control circuit;
two paths of input pins of the power supply selection logic control circuit are respectively connected with an internal isolation power supply and an external isolation power supply;
one output pin of the power supply selection logic control circuit is connected with one power supply input pin of the digital isolator.
7. The CAN and 485 multiplexed communication protection circuit of claim 6, wherein the internal isolated power supply is 3.3V and the external isolated power supply is 5V.
8. The CAN and 485 multiplexed communication protection circuit of claim 1, wherein a pair of serial input pins of the channel switch circuit are respectively connected with external serial ports.
9. An energy storage system, comprising a communication module, wherein the communication module employs a CAN and 485 multiplexed communication protection circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322731140.3U CN220773447U (en) | 2023-10-11 | 2023-10-11 | CAN and 485 multiplexing communication protection circuit and energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322731140.3U CN220773447U (en) | 2023-10-11 | 2023-10-11 | CAN and 485 multiplexing communication protection circuit and energy storage system |
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| CN220773447U true CN220773447U (en) | 2024-04-12 |
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| CN202322731140.3U Active CN220773447U (en) | 2023-10-11 | 2023-10-11 | CAN and 485 multiplexing communication protection circuit and energy storage system |
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