Resistor intelligent identification system and communication combination system

Abstract

The invention relates to a resistor intelligent identification system and a communication combination system. The resistor intelligent identification system comprises a first communication device, an Nth communication device and a communication device group which are connected in sequence, the OUT interface module of the first communication device is connected with the IN interface module of the communication device group, and the OUT interface module of the communication device group is connected with the IN interface module of the Nth communication device. In the field of automatic control, downstream clients need to carry out a series of field adjustment work after purchasing a plurality of pieces of communication equipment of upstream energy storage manufacturers in batches, so that normal operation of the plurality of pieces of communication equipment can be ensured. On one hand, the time of customers is delayed, and on the other hand, the workload of after-sales services of energy storage manufacturers is increased. Based on this, according to the scheme of the application, the process of resistance adjustment can be omitted to save time, and the reliability of the communication combination system can be ensured.

Description

Technical Field

[0001] This invention relates to the field of automatic control, and in particular to a resistance intelligent identification system and a communication combination system. Background Technology

[0002] In the field of automatic control, after downstream customers purchase multiple communication devices from upstream energy storage manufacturers in bulk, they still need to carry out a series of on-site adjustments to ensure the normal operation of these devices. This not only delays the customer's time but also increases the workload of the energy storage manufacturer's after-sales service.

[0003] For example, at a customer's site, multiple communication devices need to be interconnected to form a communication system. However, the overall resistance after such connection does not meet the standard resistance range requirements, necessitating adjustment of the overall resistance (e.g., adding terminating resistors) to ensure the communication system meets the standard resistance range requirements, i.e., the matching resistor requirements. Therefore, existing technology has shortcomings; not only is the resistance adjustment process cumbersome, but the communication system still suffers from insufficient reliability even after adjustment. Currently, no reasonable solution has been proposed in the industry to address these technical problems. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to design a technical solution that can not only eliminate the process of resistance adjustment to save time, but also ensure the reliability of the communication combination system.

[0005] In a first aspect, embodiments of the present invention provide a resistor intelligent identification system, the resistor intelligent identification system comprising: a first communication device, an Nth communication device, and a communication device group connected in sequence; the OUT interface module of the first communication device is connected to the IN interface module of the communication device group, and the OUT interface module of the communication device group is connected to the IN interface module of the Nth communication device.

[0006] Most existing PCS communication interfaces use RJ45 interfaces, meaning both the IN and OUT interfaces use RJ45 communication interfaces. This solution enables the PCS to automatically identify which is the first and last unit. Furthermore, it only requires one pin on the RJ45 interface. By satisfying these two requirements, the CAN matching resistors of the first and last PCS units can be connected to the parallel system.

[0007] A further technical solution is that the first communication device is provided with a first matching resistor R2-1, and the Nth communication device is provided with an Nth matching resistor R2-N. The first matching resistor R2-1 is connected to the Nth matching resistor R2-N after passing through the OUT interface module of the first communication device, the IN interface module of the communication device group, the OUT interface module of the communication device group, and the IN interface module of the Nth communication device in sequence, so as to realize the parallel connection of the first matching resistor R2-1 and the Nth matching resistor R2-N.

[0008] A further technical solution is that the IN interface module of the first communication device includes an EN1 unit, and the OUT interface module of the first communication device includes an EN2 unit. Specifically, the internal structure of the first communication device is such that the EN1 unit is sequentially connected to the first optocoupler U1, the first switch Q1, the second optocoupler U2, the first matching resistor R2-1, and the OUT interface module of the first communication device. The first switch Q1 of the first communication device is sequentially connected to the third switch Q3, the second optocoupler U3, and the EN2 unit of the OUT interface module of the first communication device, and then connected to the IN interface module of the adjacent communication device in the communication device group.

[0009] A further technical solution is that the IN interface module of the Nth communication device includes an EN1 unit, and the OUT interface module of the Nth communication device includes an EN2 unit; the internal structure of the Nth communication device is specifically such that the EN1 unit is sequentially connected to the first optocoupler U1, the first switch Q1, the second optocoupler U2, the Nth matching resistor R2-N, and the OUT interface module of the Nth communication device; the first switch Q1 of the Nth communication device is sequentially connected to the third switch Q3, the second optocoupler U3, and the EN2 unit of the OUT interface module of the Nth communication device, and thus connected to functional devices outside the resistor intelligent identification system.

[0010] A further technical solution is that the communication device group includes at least four communication devices, and the internal structure of each of the at least four communication devices is the same as that of the first communication device. Further, the resistance value of the first matching resistor R2-1 is equal to the resistance value of the Nth matching resistor R2-N. Further, the resistance range of both the first matching resistor R2-1 and the Nth matching resistor R2-N is 100 ohms to 120 ohms. Further, the solution described in this application includes the following three parts.

[0011] In the first part, all N devices in this application have the same circuit (at least six devices), and have two external interfaces, namely IN and OUT. The IN interface is defined as: GND unit, EN1 unit, CANH unit, CANL unit; the OUT interface is defined as: GND unit, EN2 unit, CANH unit, CANL unit; among them, CANH unit and CANL unit both correspond to the CAN bus; furthermore, GND unit is the device communication power ground; EN1 unit is the identification interface of the first PCS, and EN2 unit is the identification interface of the last PCS.

[0012] In the second part, when there are at least six devices, the OUT pin of the previous device is connected to the IN pin of the next device. Specifically, the IN pin of the first device does not need to be connected, and the OUT pin of the last device does not need to be connected. The EN2 pin of the OUT interface of the previous device powers the optocoupler of the EN1 pin of the IN interface of the next device, and simultaneously powers the optocoupler of the EN2 pin of the previous device. If it is the first device, then the IN pin does not need to be connected to any other device, and the optocoupler of the EN1 pin of the IN interface will not be powered. If it is the last device, then the OUT pin does not need to be connected to any other device, and the optocoupler of the EN2 pin of the OUT interface will not be powered.

[0013] In the third part, after at least six devices are wired, the first and last devices (the first and Nth devices) will have their OUT or IN interfaces not connected, while the intermediate devices will have both their OUT and IN interfaces connected. A NOR gate circuit is used to automatically enable the terminating resistor for the first and last devices. The conducting sides of the optocouplers in units EN1 and EN2 are the input ports of the NOR gates, with EN1 corresponding to EN1_IO and EN2 corresponding to EN2_IO. Furthermore, the output of the NOR gate is connected to the cathode of the optocoupler diode, and the other end of the optocoupler is connected in series with a 120-ohm resistor to the communication line. When both EN1_IO and EN2_IO are low, the NOR gate output is high, thus disabling the terminating resistor; when either EN1_IO or EN2_IO is high, the NOR gate output is low, thus enabling the terminating resistor.

[0014] Compared with existing technologies, this solution has the following advantages: First, this solution can complete the identification and input of the terminating resistor using a single line, without the need for manual handling of the terminating resistor; Second, it helps reduce the maintenance cost of incorrect connections and improves the reliability of the entire system; Third, even if any device loses power, a terminating resistor with a preset resistance value can still be maintained on the communication line system; Fourth, the current-type identification scheme adopted has strong anti-interference capabilities; Fifth, when one device loses power due to a fault, the fault point can be automatically reported through the next or previous machine.

[0015] The innovations of this invention patent include: by using one pin in the IN and OUT interfaces and its corresponding identification circuit, the software can automatically identify the first and last PCS, thereby automatically connecting the CAN matching resistor to the circuit, so that the CAN communication will maintain a 60-ohm matching resistor value regardless of the number of nodes, thus making the CAN communication more stable and reliable compared with the existing technology.

[0016] In summary, in the field of automatic control, after downstream customers purchase multiple communication devices from upstream energy storage manufacturers in bulk, a series of on-site adjustments are still required to ensure the normal operation of these devices. This not only wastes the customer's time but also increases the workload of the energy storage manufacturer's after-sales service. Therefore, the solution described in this application not only eliminates the resistance adjustment process to save time but also ensures the reliability of the communication system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the framework of the intelligent resistance identification system proposed in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of a prior art solution proposed in an embodiment of the present invention.

[0020] Figure 3 This is an internal circuit diagram of the intelligent resistance identification system proposed in an embodiment of the present invention.

[0021] Figure 4 This is a circuit diagram of the peripheral circuit of the first matching resistor proposed in an embodiment of the present invention.

[0022] Figure 5 This is a circuit diagram of the Nth matching resistor proposed in an embodiment of the present invention. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] It should be understood that the terminology used in the specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in the specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] Example See Figure 1 as well as Figure 2 As shown, this invention proposes a resistance intelligent identification system and a communication combination system. Currently, major energy storage manufacturers develop parallel operation solutions (communication combination systems) for users to choose from. In parallel operation solutions, it is usually necessary to connect the CAN communication of each PCS in parallel or in series (see...). Figure 2 As shown in the diagram, when using CAN communication with multiple nodes, the matching resistor must be between 40 ohms and 60 ohms (standard resistance range requirement). Each PCS's output CAN communication interface constitutes a node. Based on this, in a first aspect, this invention proposes a resistor intelligent identification system, comprising: a first communication device, an Nth communication device, and a communication device group connected sequentially; the OUT interface module of the first communication device is connected to the IN interface module of the communication device group, and the OUT interface module of the communication device group is connected to the IN interface module of the Nth communication device.

[0026] Most existing PCS communication interfaces use RJ45 interfaces, meaning both the IN and OUT interfaces use RJ45 communication interfaces. This solution enables the PCS to automatically identify which is the first and last unit. Furthermore, it only requires one pin on the RJ45 interface. By satisfying these two requirements, the CAN matching resistors of the first and last PCS units can be connected to the parallel system.

[0027] The further technical solution is as follows, see details below. Figure 3 as well as Figure 4 as well as Figure 5 As shown, the first communication device has a first matching resistor R2-1, and the Nth communication device has an Nth matching resistor R2-N. The first matching resistor R2-1 passes sequentially through the OUT interface module of the first communication device, the IN interface module of the communication device group, the OUT interface module of the communication device group, and the IN interface module of the Nth communication device before being connected to the Nth matching resistor R2-N to achieve parallel connection of the first matching resistor R2-1 and the Nth matching resistor R2-N. The technical effect of the above solution is that by connecting the first matching resistor R2-1 and the Nth matching resistor R2-N in parallel, the expected resistance value can be obtained, thereby maintaining a terminating resistor with a preset resistance value on the communication line system.

[0028] Further technical solutions are as follows, please refer to [link / reference]. Figure 3 As shown, the IN interface module of the first communication device includes an EN1 unit, and the OUT interface module of the first communication device includes an EN2 unit. The internal structure of the first communication device is as follows: the EN1 unit is sequentially connected to the first optocoupler U1, the first switch Q1, the second optocoupler U2, the first matching resistor R2-1, and the OUT interface module of the first communication device. The first switch Q1 of the first communication device is sequentially connected to the third switch Q3, the second optocoupler U3, and the EN2 unit of the OUT interface module of the first communication device, and then connected to the IN interface module of the adjacent communication device in the communication device group.

[0029] Further technical solutions are as follows, please refer to [link / reference]. Figure 3 As shown, the IN interface module of the Nth communication device includes an EN1 unit, and the OUT interface module of the Nth communication device includes an EN2 unit. The internal structure of the Nth communication device is as follows: the EN1 unit is sequentially connected to the first optocoupler U1, the first switch Q1, the second optocoupler U2, the Nth matching resistor R2-N, and the OUT interface module of the Nth communication device; the first switch Q1 of the Nth communication device is sequentially connected to the third switch Q3, the second optocoupler U3, and the EN2 unit of the OUT interface module of the Nth communication device, and thus connected to functional devices outside the resistor intelligent identification system.

[0030] A further technical solution is that the communication device group includes at least four communication devices, and the internal structure of each of the at least four communication devices is the same as that of the first communication device. Further, the resistance value of the first matching resistor R2-1 is equal to the resistance value of the Nth matching resistor R2-N. Further, the resistance range of both the first matching resistor R2-1 and the Nth matching resistor R2-N is 100 ohms to 120 ohms. Further, the solution described in this application includes the following three parts.

[0031] In the first part, all N devices in this application have the same circuit (at least six devices), and have two external interfaces, namely IN and OUT. The IN interface is defined as: GND unit, EN1 unit, CANH unit, CANL unit; the OUT interface is defined as: GND unit, EN2 unit, CANH unit, CANL unit; among them, CANH unit and CANL unit both correspond to the CAN bus; furthermore, GND unit is the device communication power ground; EN1 unit is the identification interface of the first PCS, and EN2 unit is the identification interface of the last PCS.

[0032] In the second part, when there are at least six devices, the OUT pin of the previous device is connected to the IN pin of the next device. Specifically, the IN pin of the first device does not need to be connected, and the OUT pin of the last device does not need to be connected. The EN2 pin of the OUT interface of the previous device powers the optocoupler of the EN1 pin of the IN interface of the next device, and simultaneously powers the optocoupler of the EN2 pin of the previous device. If it is the first device, then the IN pin does not need to be connected to any other device, and the optocoupler of the EN1 pin of the IN interface will not be powered. If it is the last device, then the OUT pin does not need to be connected to any other device, and the optocoupler of the EN2 pin of the OUT interface will not be powered.

[0033] In the third part, after at least six devices are wired, the first and last devices (the first and Nth devices) will have their OUT or IN interfaces not connected, while the intermediate devices will have both their OUT and IN interfaces connected. A NOR gate circuit is used to automatically enable the terminating resistor for the first and last devices. The conducting sides of the optocouplers in units EN1 and EN2 are the input ports of the NOR gates, with EN1 corresponding to EN1_IO and EN2 corresponding to EN2_IO. Furthermore, the output of the NOR gate is connected to the cathode of the optocoupler diode, and the other end of the optocoupler is connected in series with a 120-ohm resistor to the communication line. When both EN1_IO and EN2_IO are low, the NOR gate output is high, thus disabling the terminating resistor; when either EN1_IO or EN2_IO is high, the NOR gate output is low, thus enabling the terminating resistor.

[0034] In one embodiment, the communication device group includes four communication devices, plus a first communication device and an Nth communication device, for a total of six communication devices. The first communication device corresponds to PCS1, and the Nth communication device is PCS6 (i.e., the sixth communication device). Further, see... Figure 3As shown, the identification principle of EN1 and EN2 units in the system is as follows: When PCS1 is the first unit, there is no signal input to the IN interface of PCS1, so there is no input signal to EN1 unit. Pin 4 of optocoupler U1 is at a high level, transistor Q1 is turned on, and current flows through Pin 1 and Pin 2 of optocoupler U2. Pin 3 and Pin 4 are essentially shorted. At this time, R2 is automatically connected to the CANH and CANL terminals. Thus, the CAN matching resistor R2 of the first unit is now connected to the circuit system. Furthermore, when the OUT of PCS1 is connected to the IN of PCS2, the EN2 and EN1 units form a path, specifically as follows: +5V passes through R12 and Pin1 and Pin2 of the U3 optocoupler; the EN2 unit is connected to the EN1 unit and then through U1, R3, and Q2 to the GND current loop; Pin3 and Pin4 of U3 and U1 are essentially shorted, pulling the base voltage of the transistors Q1 and Q3 to zero, and U2 is not conducting; the matching resistor R2 is not connected to the CAN communication circuit. Furthermore, when PCS6 is the last unit, since there is no signal input to the OUT interface of PCS6, the EN2 unit is floating, the optocoupler U3 is not conducting, the base of the transistor Q3 is at a high level, and Q3 is conducting. Current flows through Pin1 and Pin2 of the optocoupler U2, and Pin3 and Pin4 are essentially short-circuited. At this time, R2 is automatically connected to the CANH and CANL terminals. On the other hand, the CAN matching resistor R2 of the last unit has been connected to the circuit.

[0035] Compared with existing technologies, this solution has the following advantages: First, this solution can complete the identification and input of the terminating resistor using a single line, without the need for manual handling of the terminating resistor; Second, it helps reduce the maintenance cost of incorrect connections and improves the reliability of the entire system; Third, even if any device loses power, a terminating resistor with a preset resistance value can still be maintained on the communication line system; Fourth, the current-type identification scheme adopted has strong anti-interference capabilities; Fifth, when one device loses power due to a fault, the fault point can be automatically reported through the next or previous machine.

[0036] In summary, in the field of automatic control, after downstream customers purchase multiple communication devices from upstream energy storage manufacturers in bulk, a series of on-site adjustments are still required to ensure the normal operation of these devices. This not only wastes the customer's time but also increases the workload of the energy storage manufacturer's after-sales service. Therefore, the solution described in this application not only eliminates the resistance adjustment process to save time but also ensures the reliability of the communication system.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0042] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0043] The above description describes specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A resistor intelligent identification system, characterized in that, The intelligent resistance identification system includes: A first communication device, an Nth communication device, and a communication device group are connected sequentially; the OUT interface module of the first communication device is connected to the IN interface module of the communication device group, and the OUT interface module of the communication device group is connected to the IN interface module of the Nth communication device.

2. The intelligent resistance identification system according to claim 1, characterized in that: The first communication device is provided with a first matching resistor R2-1, and the Nth communication device is provided with an Nth matching resistor R2-N. The first matching resistor R2-1 is connected to the Nth matching resistor R2-N after passing through the OUT interface module of the first communication device, the IN interface module of the communication device group, the OUT interface module of the communication device group, and the IN interface module of the Nth communication device in sequence, so as to realize the parallel connection of the first matching resistor R2-1 and the Nth matching resistor R2-N.

3. The intelligent resistance identification system according to claim 2, characterized in that: The IN interface module of the first communication device includes an EN1 unit, and the OUT interface module of the first communication device includes an EN2 unit. Specifically, the internal structure of the first communication device is such that the EN1 unit is sequentially connected to the first optocoupler U1, the first switch Q1, the second optocoupler U2, the first matching resistor R2-1, and the OUT interface module of the first communication device. The first switch Q1 of the first communication device is sequentially connected to the third switch Q3, the second optocoupler U3, and the EN2 unit of the OUT interface module of the first communication device, and then connected to the IN interface module of the adjacent communication device in the communication device group.

4. The intelligent resistance identification system according to claim 3, characterized in that: The IN interface module of the Nth communication device includes an EN1 unit, and the OUT interface module of the Nth communication device includes an EN2 unit. Specifically, the internal structure of the Nth communication device is as follows: the EN1 unit is sequentially connected to the first optocoupler U1, the first switch Q1, the second optocoupler U2, the Nth matching resistor R2-N, and the OUT interface module of the Nth communication device; the first switch Q1 of the Nth communication device is sequentially connected to the third switch Q3, the second optocoupler U3, and the EN2 unit of the OUT interface module of the Nth communication device, and thus connected to functional devices outside the resistor intelligent identification system.

5. The intelligent resistance identification system according to claim 4, characterized in that: The communication equipment group includes at least four communication devices, and the internal structure of at least four communication devices is the same as that of the first communication device.

6. The intelligent resistance identification system according to claim 5, characterized in that: The resistance value of the first matching resistor R2-1 is equal to the resistance value of the Nth matching resistor R2-N.

7. The intelligent resistance identification system according to claim 6, characterized in that: The resistance range of the first matching resistor R2-1 and the resistance range of the Nth matching resistor R2-N are both 100 ohms to 120 ohms.

8. A communication combination system, characterized in that, The communication system includes the resistor intelligent identification system as described in claims 1 to 7.

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