CN219892986U - Battery management module and battery management system - Google Patents
Battery management module and battery management system Download PDFInfo
- Publication number
- CN219892986U CN219892986U CN202320950699.2U CN202320950699U CN219892986U CN 219892986 U CN219892986 U CN 219892986U CN 202320950699 U CN202320950699 U CN 202320950699U CN 219892986 U CN219892986 U CN 219892986U
- Authority
- CN
- China
- Prior art keywords
- battery management
- management module
- access
- signal
- access detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 101
- 238000004891 communication Methods 0.000 claims abstract description 55
- 230000005669 field effect Effects 0.000 claims description 3
- 101100134058 Caenorhabditis elegans nth-1 gene Proteins 0.000 claims 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 101000984533 Homo sapiens Ribosome biogenesis protein BMS1 homolog Proteins 0.000 description 1
- 102100027057 Ribosome biogenesis protein BMS1 homolog Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to the field of battery management, in particular to a battery management module and a battery management system. The battery management module comprises a terminal resistor, a switch unit and a main control unit, wherein the switch unit is connected with the terminal resistor in series and connected with a communication bus of the battery management system in parallel; the main control unit is provided with a first access detection end, a second access detection end and a detection chip, wherein the first access detection end is used for receiving a first access signal of one battery management module, the second access detection end is used for receiving a second access signal of the other battery management module, the detection chip is respectively connected with the first access detection end and the second access detection end, and a control signal is output to the switch unit based on the first access signal received by the first access detection end and the second access signal received by the second access detection end so as to switch on or switch off the switch unit. The utility model can reduce the operation and maintenance difficulty of users, is convenient to operate and ensures the normal use of products.
Description
Technical Field
The utility model relates to the field of battery management, in particular to a battery management module and a battery management system.
Background
The battery module generally sets up a battery management module to monitor the internal charging voltage, current, temperature, discharging current and other operating parameters so as to ensure the normal operation of the battery module.
The battery system is formed by connecting a plurality of battery modules in parallel, and the plurality of battery modules are connected in parallel for charging, discharging, standing and the like. The battery system can be provided with a central control module for uniformly managing and controlling the battery management modules corresponding to the plurality of battery modules. Specifically, the central control module is connected to the battery management module of each battery module through a communication bus to acquire the operation information of the battery module or manage and control the battery module.
Further, in order to ensure stable communication of the communication bus, a termination resistor needs to be connected in parallel to the head and tail ends of the communication bus. However, since the number of the parallel battery modules can be determined after the application system is built, a user needs to manually connect a terminal resistor in parallel at the head end and the tail end of the communication bus after the application system is built so as to ensure the stability of communication, and the user needs to have professional knowledge skills, so that the operation is inconvenient and the normal use of the product is influenced easily due to improper operation.
Disclosure of Invention
The utility model aims to solve the technical problems that aiming at the defects in the prior art, the utility model provides a battery management module and a battery management system, and solves the problems that the resistance operation of a communication bus access terminal of the traditional battery system is inconvenient and the normal use of products is easily affected.
The technical scheme adopted for solving the technical problems is as follows: there is provided a battery management module applied to a battery management system and connected to a communication bus of the battery management system, the battery management module including a termination resistor, a switching unit and a main control unit, wherein,
the switch unit is connected with the terminal resistor in series and connected with the terminal resistor in parallel to a communication bus of the battery management system;
the main control unit is provided with a first access detection end, a second access detection end and a detection chip, wherein the first access detection end is used for receiving a first access signal of a battery management module, the second access detection end is used for receiving a second access signal of another battery management module, the detection chip is respectively connected with the first access detection end and the second access detection end, and a control signal is output to the switch unit based on the first access signal received by the first access detection end and the second access signal received by the second access detection end so as to switch on or switch off the switch unit.
Among them, the preferred scheme is: the detection chip comprises an exclusive-or gate, a first input end of the exclusive-or gate is connected with the first access detection end, a second input end of the exclusive-or gate is connected with the second access detection end, and an output end of the exclusive-or gate is connected with the switch unit.
Among them, the preferred scheme is: the main control unit is also provided with a first signal output end and a second signal output end, wherein the first signal output end is used for outputting a second access signal, and the second signal output end is used for outputting a first access signal.
Among them, the preferred scheme is: the switch unit comprises one of a relay, a field effect transistor and a transistor.
The technical scheme adopted for solving the technical problems is as follows: the battery management system comprises a communication bus and N battery management modules, wherein the switch units and the terminal resistors of each battery management module are connected to the communication bus in parallel, N is an integer, and N is more than or equal to 2.
Among them, the preferred scheme is: the first access detection end of the Nth battery management module is connected with the N-1 th battery management module, receives the first access signal of the N-1 th battery management module, the second access detection end of the Nth battery management module is connected with the (N+1) th battery management module, and receives the second access signal of the (N+1) th battery management module.
Among them, the preferred scheme is: the main control unit of each battery management module is provided with a first signal output end and a second signal output end, the first signal output end is used for outputting a second access signal, the second signal output end is used for outputting a first access signal, the first signal output end of the Nth battery management module is connected with the second access detection end of the N-1 th battery management module, and the second signal output end of the Nth battery management module is connected with the first access detection end of the (n+1) th battery management module.
Among them, the preferred scheme is: the communication bus is a CAN bus or a 485 bus.
Among them, the preferred scheme is: the battery management system further comprises N battery modules connected in parallel, and one battery module is correspondingly connected to a main control unit of the battery management module.
Compared with the prior art, the utility model has the beneficial effects that the terminal resistor, the switch unit and the main control unit are arranged on the battery management module, the first access detection end and the second access detection end of the main control unit respectively receive the first access signal and the second access signal of the external battery management module, and the detection chip of the main control unit outputs the control signal to the switch unit based on the first access signal and the second access signal so as to switch on or switch off the switch unit, so that the terminal resistor of the battery management module is connected in parallel to the communication bus under the condition that the battery management module is automatically identified to be positioned at the head end or the tail end of the communication bus, the operation and maintenance difficulty of a user is reduced, the operation is convenient, and the normal use of products is ensured.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block diagram of one embodiment of a battery management module of the present utility model;
FIG. 2 is a block diagram illustrating a connection between a first access detection terminal and a second access detection terminal and a detection chip in an embodiment of a battery management module according to the present utility model;
FIG. 3 is a block diagram of one embodiment of a battery management system of the present utility model;
FIG. 4 is a block diagram illustrating the construction of one embodiment of a battery management system according to the present utility model;
fig. 5 is a schematic circuit diagram of a battery management system according to an embodiment of the present utility model.
The reference numerals in the drawings are as follows:
100. a battery management module; 110. a termination resistor; 120. a switching unit; 130. a main control unit; 131. a first access detection end; 132. a second access detection end; 133. a detection chip; 1331. an exclusive or gate; 134. a first signal output terminal; 135. a second signal output terminal;
200. a communication bus.
Detailed Description
Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings.
The battery management module 100 may control the charge, discharge, etc. of the battery module to maintain the normal operation of the battery module. The battery management module 100 may be applied to a battery management system, in which a communication bus 200 is connected to the battery management module 100, and the battery management system implements management control of the battery management modules 100 of a plurality of battery modules through the communication bus 200.
Referring to fig. 1, the present utility model provides a preferred embodiment of a battery management module 100.
The battery management module 100 includes a termination resistor 110, a switching unit 120, and a main control unit 130.
The switching unit 120 is connected in series with the termination resistor 110 and connected in parallel with the termination resistor 110 to the communication bus 200 of the battery management system.
The main control unit 130 is provided with a first access detection end 131, a second access detection end 132 and a detection chip 133, the first access detection end 131 is used for receiving a first access signal of a battery management module 100, the second access detection end 132 is used for receiving a second access signal of another battery management module 100, the detection chip 133 is respectively connected with the first access detection end 131 and the second access detection end 132, and a control signal is output to the switch unit 120 based on the first access signal received by the first access detection end 131 and the second access signal received by the second access detection end 132 so as to switch on or off the switch unit 120.
According to the utility model, the terminal resistor 110, the switch unit 120 and the main control unit 130 are arranged on the battery management module 100, the first access detection end 131 and the second access detection end 132 of the main control unit 130 respectively receive the first access signal and the second access signal of the external battery management module 100, and the detection chip 133 of the main control unit 130 outputs a control signal to the switch unit 120 based on the first access signal and the second access signal so as to switch on or switch off the switch unit 120, so that the terminal resistor 110 of the battery management module 100 is connected in parallel to the communication bus 200 under the condition that the battery management module 100 is automatically identified to be positioned at the head end or the tail end of the communication bus 200, the operation and maintenance difficulty of a user is reduced, the operation is convenient, and the normal use of a product is ensured.
Among other things, termination resistor 110 is an impediment encountered by electronic information during transmission. When high-frequency signals are transmitted, the wavelength of the signals is shorter than that of the transmission line, reflected waves are formed at the terminal of the transmission line by the signals, and original signals are interfered, so that the signals are connected to the terminal resistor 110 in parallel at the head end and the tail end of the communication bus 200 of the battery management system, and the signals can not be reflected after reaching the head end and the tail end of the communication bus 200, thereby ensuring the reliability of communication. The resistance of termination resistor 110 may be selectively determined based on the type of actual communication bus 200.
In one embodiment, referring to fig. 1 and 2, the detection chip 133 includes an exclusive or gate 1331, a first input terminal of the exclusive or gate 1331 is connected to the first access detection terminal 131, a second input terminal is connected to the second access detection terminal 132, and an output terminal is connected to the switching unit 120. The exclusive or gate 1331 outputs a control signal to the switching unit 120 based on the first and second access signals input from the first and second access detection terminals 131 and 132 to turn on or off the switching unit 120, thereby allowing the terminal resistor 110 of the battery management module 100 to be connected in parallel to the communication bus 200 of the battery management system or to maintain a disconnected state.
Specifically, the first access signal received by the first access detection end 131 is a high level signal or a low level signal, i.e. 1 or 0, and the second access signal received by the second access detection end 132 is also a high level signal or a low level signal, i.e. 1 or 0.
When the first access signal received by the first access detection end 131 is 1, the second access signal received by the second access detection end 132 is 1, which indicates that the first access detection end 131 and the second access detection end 132 of the battery management module 100 are both connected to the external battery management module 100 for use, that is, the battery management module 100 is located in the middle position of the communication bus 200, the output of the exclusive or gate 1331 is 0, that is, a low level signal is output, the switch unit 120 is disconnected under the control of the low level signal, and the terminal resistor 110 connected in series with the switch unit 120 remains in a disconnected state and is not connected to the communication bus 200.
When the first access signal received by the first access detection end 131 is 0, the second access detection end 132 receives the second access signal as 0, which means that neither the first access detection end 131 nor the second access detection end 132 of the battery management module 100 is connected to the external battery management module 100 for use, that is, the battery management module 100 is not connected for use, the xor gate 1331 outputs 0, that is, outputs a low level signal, the switch unit 120 is disconnected under the control of the low level signal, and the termination resistor 110 connected in series with the switch unit 120 remains in a disconnected state and is not connected to the communication bus 200.
When one of the first access signal received by the first access detection end 131 and the second access signal received by the second access detection end 132 is 1 and the other is 0, it is indicated that one of the first access detection end 131 and the second access detection end 132 of the battery management module 100 has an external battery management module 100 connected to the external battery management module for use, that is, the battery management module 100 is located at the head end or the tail end of the communication bus 200, the output of the exclusive-OR gate 1331 is 1, that is, a high level signal is output, the switch unit 120 is turned on under the control of the high level signal, and the terminal resistor 110 connected in series with the switch unit 120 is connected in parallel to the communication bus 200, so as to ensure the communication stability of the communication bus 200.
The signals input by the first access detection terminal 131 and the second access detection terminal 132 may be sent by the corresponding accessed battery management module 100 or may be sent by another control module.
The detection chip 133 may be an existing chip having one or more logic gates, including an exclusive-or gate 1331.
In one embodiment, referring to fig. 1 and 2, the main control unit 130 is further provided with a first signal output terminal 134 and a second signal output terminal 135, the first signal output terminal 134 for outputting the second access signal, and the second signal output terminal 135 for outputting the first access signal.
By setting the first signal output end 134 to output the second access signal, the second signal output end 135 outputs the first access signal, and after the battery management module 100 is connected and connected to other battery management modules 100, the corresponding first access signal and second access signal can be transmitted to the first access detection end 131 and the second access detection end 132 of the corresponding battery management module 100, without setting an additional control module to output the first access signal and the second access signal, and the structure of the battery management module 100 is simple and smart.
In one embodiment, the switch unit 120 may be one of a relay, a field effect transistor, and a transistor, which may be turned on or off under the control of the control signal of the detection chip 133, and the termination resistor 110 is connected to the communication bus 200 or kept in a disconnected state.
Referring to fig. 3 and 4, the present utility model also provides a preferred embodiment of a battery management system.
Referring to fig. 3 and 4, the battery management system includes a communication bus 200 and N battery management modules 100 as described above, and the switching unit 120 of each battery management module 100 is connected to the communication bus 200 in parallel with the termination resistor 110, where N is an integer and N is not less than 2.
In the battery management system of the present utility model, by setting the terminal resistor 110, the switch unit 120 and the main control unit 130, the first access detection end 131 and the second access detection end 132 of the main control unit 130 respectively receive the first access signal and the second access signal of the external battery management module 100, and the detection chip 133 of the main control unit 130 outputs a control signal to the switch unit 120 based on the first access signal and the second access signal, so as to switch on or switch off the switch unit 120, thereby connecting the terminal resistor 110 of the battery management module 100 in parallel to the communication bus 200 under the condition that the battery management module 100 is automatically identified to be located at the head end or the tail end of the communication bus 200, reducing the operation and maintenance difficulty of a user, being convenient to operate, and ensuring the normal use of products.
The first access detection end 131 of the nth battery management module 100 is connected with the (N-1) th battery management module 100, receives the first access signal of the (N-1) th battery management module 100, and the second access detection end 132 of the nth battery management module 100 is connected with the (n+1) th battery management module 100, and receives the second access signal of the (n+1) th battery management module 100.
By connecting the N-1 th battery management module 100 to the first access detection terminal 131 of the N-th battery management module 100 and connecting the n+1 th battery management module 100 to the second access detection terminal 132 of the N-th battery management module 100, with this connection structure, each battery management module 100 recognizes whether itself is at the head end or the end of the communication bus 200 based on the access signal input from the connected battery management module 100, so that in the case that it is recognized that itself is at the head end or the end of the communication bus 200, the self-contained terminal resistor 110 is connected in parallel to the communication bus 200 without manually checking whether the battery management module 100 is connected to the head end or the end of the communication bus 200 for use, which is convenient to operate.
In one embodiment, the main control unit 130 of each battery management module 100 is provided with a first signal output end 134 and a second signal output end 135, the first signal output end 134 is used for outputting a second access signal, the second signal output end 135 is used for outputting a first access signal, the first signal output end 134 of the nth battery management module 100 is connected with the second access detection end 132 of the N-1 th battery management module 100, and the second signal output end 135 of the nth battery management module 100 is connected with the first access detection end 131 of the n+1th battery management module 100.
By providing the first signal output terminal 134 and the second signal output terminal 135 in each battery management module 100, and connecting n battery management modules 100, each battery management module 100 itself is utilized to send out the first access signal and the second access signal, and each battery management module 100 identifies whether itself is at the head end or the tail end of the communication bus 200 based on the access signal input by the connected battery management module 100.
In the battery management system of the present utility model, the communication bus 200 is a CAN bus or a 485 bus. In this embodiment, the communication bus 200 is preferably a CAN bus. The CAN bus is a serial communication protocol bus for real-time applications, which CAN use twisted pair wires to transmit signals, and is one of the most widely used fieldbuses worldwide. Each battery management module 100 is connected in parallel with the CAN bus, and communicates with an external central control module through the CAN bus to upload own operation information.
Wherein the CAN bus includes a high signal line and a low signal line. A high signal line and a low signal line are connected in parallel with each of the battery management modules 100. The switching unit 120 and the termination resistor 110 of each battery management module 100 are connected in series and then connected in parallel between the high signal line and the low signal line. When the switching unit 120 is turned on, the termination resistor 110 is connected in parallel between the high signal line and the low signal line; when the switching unit 120 is turned off, the termination resistor 110 maintains a disconnected state, and is not connected between the high signal line and the low signal line.
In one embodiment, the battery management system further includes N battery modules connected in parallel, and one battery module is correspondingly connected to one battery management module 100. Each battery management module 100 may control the operation states of charge, discharge, etc. of the corresponding battery module.
The capacity of the battery formed by the whole can be increased by connecting N battery modules in parallel, and longer battery service time and higher electric energy output capability are provided.
The following describes the working principle of the battery management system according to the present utility model in a specific implementation scenario with reference to fig. 1 to 5, where fig. 5 is a schematic circuit diagram of the battery management system in a specific implementation scenario:
IN fig. 5, the identifier CANH is a high signal line of the CAN bus, CANL is a low signal line of the CAN bus, N battery modules are connected IN parallel, the identifier pack is a battery module, the identifier BMSn is a battery management module 100 corresponding to the battery module, the identifiers IN1 and IN2 are a first access detection end 131 and a second access detection end 132 corresponding to the battery management module 100, and the identifiers OUT1 and OUT2 are a first signal output end 134 and a second signal output end 135 corresponding to the battery management module 100, respectively. The nth battery management module 100 enables the access signals to be sent from the OUT1 terminal and the OUT2 terminal, and the two input terminals of the xor gate 1331 of the nth battery management module 100 input the access signals input from the IN1 terminal and the IN2 terminal, and the output terminal outputs the control signal. If the result of the signal at the IN1 end or the signal at the IN2 end is 0, it indicates that the IN1 end and the IN2 end of the battery management module are both connected to another battery management module 100 for use, or that the IN1 end and the IN2 end are not connected to another battery management module 100 for use, and the battery management module 100 and the corresponding battery module are located at the middle position of the communication bus 200 or are not connected IN parallel for use; if the result of the signal at the IN1 end or the signal at the IN2 end is 1, it is indicated that one of the IN1 end and the IN2 end of the battery management module is connected to another battery management module 100 for use, and the battery management module 100 is located at the head end or the tail end of the communication bus 200, i.e. as BMS1 and BMSn IN fig. 5, the corresponding battery modules PACK1 and PACK n are located at the head end or the tail end, and the corresponding switch unit 120 is controlled to be turned on, so that the terminal resistor 110 of the battery management module 100 is connected IN parallel to the communication bus 200, thereby realizing automatic identification that the battery management module 100 and the corresponding battery module are located at the head end or the tail end of the communication bus 200, and automatic parallel connection and combination of the terminal resistor 110.
It should be noted that, the battery management module 100 and the battery management system of the present utility model include specific hardware structures such as the terminal resistor 110, the switch unit 120, and the main control unit 130, and mainly protect the connection manner between the hardware structures, and part of hardware such as the main control unit 130 has the participation of a software program in the operation process of the battery module, so that the software program assisting the battery management module 100 and the battery management system to operate is a current replicable software program, and does not constitute the innovation point of the present utility model.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the utility model, but rather is intended to cover all modifications and variations within the scope of the present utility model as defined in the appended claims.
Claims (9)
1. A battery management module is characterized in that the battery management module is applied to a battery management system and is connected with a communication bus of the battery management system, the battery management module comprises a terminal resistor, a switch unit and a main control unit, wherein,
the switch unit is connected with the terminal resistor in series and connected with the terminal resistor in parallel to a communication bus of the battery management system;
the main control unit is provided with a first access detection end, a second access detection end and a detection chip, wherein the first access detection end is used for receiving a first access signal of a battery management module, the second access detection end is used for receiving a second access signal of another battery management module, the detection chip is respectively connected with the first access detection end and the second access detection end, and a control signal is output to the switch unit based on the first access signal received by the first access detection end and the second access signal received by the second access detection end so as to switch on or switch off the switch unit.
2. The battery management module of claim 1, wherein the detection chip comprises an exclusive-or gate, a first input terminal of the exclusive-or gate is connected to the first access detection terminal, a second input terminal of the exclusive-or gate is connected to the second access detection terminal, and an output terminal of the exclusive-or gate is connected to the switching unit.
3. The battery management module of claim 1, wherein the main control unit is further provided with a first signal output terminal for outputting a second access signal and a second signal output terminal for outputting a first access signal.
4. A battery management module according to any one of claims 1 to 3, wherein the switching unit comprises one of a relay, a field effect transistor, and a transistor.
5. A battery management system comprising a communication bus and N battery management modules according to any one of claims 1 to 4, a switching unit of each of the battery management modules being connected to the communication bus in parallel with a termination resistor, wherein N is an integer and N is not less than 2.
6. The battery management system of claim 5, wherein a first access detection terminal of an nth battery management module is connected to the nth-1 battery management module and receives a first access signal of the nth-1 battery management module, and a second access detection terminal of the nth battery management module is connected to the (n+1) th battery management module and receives a second access signal of the (n+1) th battery management module.
7. The battery management system according to claim 6, wherein the main control unit of each of the battery management modules is provided with a first signal output end and a second signal output end, the first signal output end is used for outputting a second access signal, the second signal output end is used for outputting a first access signal, the first signal output end of the nth battery management module is connected with the second access detection end of the nth-1 battery management module, and the second signal output end of the nth battery management module is connected with the first access detection end of the (n+1) th battery management module.
8. The battery management system according to any one of claims 5 to 7, wherein the communication bus is a CAN bus or a 485 bus.
9. The battery management system according to any one of claims 5 to 7, further comprising N parallel-connected battery modules, one of which is correspondingly connected to a main control unit of the battery management module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320950699.2U CN219892986U (en) | 2023-04-23 | 2023-04-23 | Battery management module and battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320950699.2U CN219892986U (en) | 2023-04-23 | 2023-04-23 | Battery management module and battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219892986U true CN219892986U (en) | 2023-10-24 |
Family
ID=88409324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320950699.2U Active CN219892986U (en) | 2023-04-23 | 2023-04-23 | Battery management module and battery management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219892986U (en) |
-
2023
- 2023-04-23 CN CN202320950699.2U patent/CN219892986U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103218331B (en) | Synchronous mode is adopted to switch and the self-adjusting bus unit of frame priority and method | |
| CN103475068B (en) | A kind of charger, charging terminal, charging system and charge control method | |
| CN107547210B (en) | Non-standard power supply equipment, powered equipment and system | |
| US20220102988A1 (en) | Battery pack | |
| US20190181656A1 (en) | Multi-cell battery management device | |
| CN219892986U (en) | Battery management module and battery management system | |
| CN102882508A (en) | Simple circuit for switching polarity of RS485 interface | |
| CN106877462A (en) | A kind of method and charger for detecting charged state | |
| CN110380469A (en) | Electronic equipment and method of supplying power to | |
| CN111711552B (en) | Terminal resistor access circuit, servo driver and control system | |
| US4881244A (en) | Transmission-reception equipment for a bus system | |
| CN209472629U (en) | RS422 communication and CAN communication equipment based on PCIE bus | |
| CN206835123U (en) | A kind of RS485 automatic receiving-transmitting switching circuits | |
| CN113596189B (en) | Parallel addressing method, battery pack and parallel addressing system | |
| CN210804414U (en) | Circuit with reusable communication interface | |
| CN114661646A (en) | Serial port switching control circuit | |
| CN216002227U (en) | Charging machine | |
| CN116404278A (en) | Battery management module and control method thereof, battery management system and control method thereof | |
| CN107562165B (en) | Power supply device and power supply management system for supplying power to server | |
| CN216281977U (en) | Communication circuit and air conditioner | |
| CN216434712U (en) | Bus node control device and bus node control system | |
| CN112448922A (en) | Protocol conversion device for air conditioner, communication system and communication method | |
| CN110401490B (en) | Level conversion circuit supporting MDIO communication, level conversion method and PAM optical module | |
| CN214256310U (en) | Signal relay circuit | |
| CN219938359U (en) | Power supply communication circuit based on twisted pair nonpolar connection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |