CN216565447U - Communication conversion circuit and communication converter with same - Google Patents

Abstract

The present disclosure relates to a communication converter circuit and a communication converter having the same, the communication converter circuit includes: a communication module; the control module is in communication connection with the communication module; the signal output end of the control module is connected with the signal input end of the prompting module; the USB interface module is electrically connected with the control module; the first power supply module is electrically connected with the communication module and the prompt module respectively; and the signal output end of the control module is connected with the signal input end of the second power supply module. The communication converter comprises the communication conversion circuit. The communication state control prompting method and the communication state control prompting device can control the prompting module to send out corresponding prompts according to the communication state, and can facilitate operators to intuitively master the communication state; the control module adopts a more universal and more stable USB interface to supply power; the battery protection board is powered by the second power supply module, so that the battery protection board can be powered and communicated with the outside when self-powered is turned off, and the stability of the communication process is improved.

Description

Communication conversion circuit and communication converter with same

Technical Field

The present disclosure relates to the field of communications devices, and in particular, to a communications converter circuit and a communications converter having the same.

Background

In recent years, with the deep popularization of energy-saving and emission-reducing concepts, batteries have been widely applied to various vehicles as power sources to reduce the usage amount of gasoline and reduce carbon emission. The battery protection board is an integrated circuit board for protecting charging and discharging of lithium battery, and generally includes control IC, MOS switch, precision resistor and auxiliary device NTC, ID memory, etc. The Battery Management System BMS (Battery Management System, BMS) is one of the core components for the safe use of batteries, and predicts the capacity of the batteries by monitoring the operating states of the batteries in real time, thereby preventing the batteries from over-discharge, over-charge, overheating and serious imbalance among the single batteries. In practical applications, the battery protection board and the BMS need to communicate to synchronize battery status information, and since the battery protection board and the BMS employ different communication protocols, for example, the battery protection board may employ a daisy chain architecture protocol, while the BMS often employs a general CAN bus communication protocol, it is necessary to use a communication converter to implement the communication between the battery protection board and the BMS.

The existing communication converter mainly carries out protocol conversion processing on signals through a built-in controller to realize communication conversion and enable the battery protection board and the BMS to communicate with each other.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problems of the prior art, it is an object of the present disclosure to provide a communication converter circuit, and it is another object of the present disclosure to provide a communication converter having the circuit. The communication state control prompting method and the communication state control prompting device can control the prompting module to send out corresponding prompts according to the communication state, and can facilitate operators to intuitively master the communication state; the control module adopts a more universal and more stable USB interface to supply power; the battery protection board is powered by the second power supply module, so that the battery protection board can be powered and communicated with the outside when self-powered is turned off, and the stability of the communication process is improved.

This disclosure describes a communication conversion circuit, includes:

a communication module;

the control module is in communication connection with the communication module so as to communicate with an external system through the communication module, and is also used for being in communication connection with the battery protection board and enabling the battery protection board to communicate with the external system through protocol conversion;

the signal output end of the control module is connected with the signal input end of the prompting module, and the control module controls the operation of the prompting module according to the communication state of the battery protection board and an external system;

the USB interface module is electrically connected with the control module and used for supplying power to the control module;

the first power supply module is respectively and electrically connected with the communication module and the prompt module for supplying power;

and the signal output end of the control module is connected with the signal input end of the second power module and used for supplying power to the battery protection board according to the control of the control module.

Preferably, the communication module includes a transceiver chip TCAN1042, and the transceiver chip TCAN1042 communicates with an external system through a CAN bus.

Preferably, the communication module further includes an isolation interface chip Nirs21, and the transceiver chip TCAN1042 is communicatively connected to the control module through the isolation interface chip Nirs 21.

Preferably, the control module comprises an STM32 series MCU.

Preferably, the prompting module comprises an indicator light and a speaker.

Preferably, the first power supply module includes a first DC-DC power supply chip; the second power module includes a second DC-DC power chip.

Preferably, the first DC-DC power supply chip and the second DC-DC power supply chip are both power supply chips B0515S.

Preferably, the second power supply module further comprises:

and the signal output end of the control module is connected with the control end of the switching element and is used for controlling the on-off of the switching element.

Preferably, the switching element is a MOS transistor.

The present disclosure also provides a communication converter, including the above communication conversion circuit.

The communication converter circuit and the communication converter with the same disclosed by the disclosure have the advantages that:

1. according to the battery protection board and the external system communication method, the control module and the prompt module are arranged, the control module controls the operation of the prompt module according to the communication state between the battery protection board and the external system, and different prompt messages are respectively sent by the communication module when the communication module tries to communicate with the BMS, successfully communicates with the BMS and reports errors of the BMS, so that an operator can intuitively master the communication state between the battery protection board and the external system, and convenience is brought to the operation of the operator during the BMS communication;

2. the control module adopts the USB interface to supply power, the USB interface is more universal in power supply mode, and the power supply is more stable, so that the working process of the communication converter is more stable;

3. this is disclosed is connected through setting up second power module and battery protection shield electricity to for the battery protection shield power supply under control module's control, can open the second power module for the battery protection shield power supply when the self-powered discharge opening of battery protection shield is closed, keep the communication between battery protection shield and the BMS, improved communication process's stability.

Drawings

Fig. 1 is a block diagram of a communication conversion circuit according to the present disclosure;

fig. 2 is a pin wiring diagram of the TCAN1042 of the transceiver chip of the present disclosure;

FIG. 3 is a pin wiring diagram of the isolation interface chip NIRs21 according to the present disclosure;

FIG. 4 is a pin wiring diagram of the STM32 series MCU of the present disclosure;

FIG. 5 is a circuit block diagram of a USB interface module according to the present disclosure;

FIG. 6 is a circuit block diagram of a first power module according to the present disclosure;

fig. 7 is a circuit configuration diagram of a second power module according to the present disclosure.

Description of reference numerals: the device comprises a communication module, a control module, a prompt module, a 4-USB interface module, a first power module, a second power module, an external system and a battery protection board, wherein the communication module is 1, the control module is 2, the prompt module is 3, the second power module is 6, and the external system is 7.

Detailed Description

As shown in fig. 1 to 7, a communication conversion circuit according to the present disclosure includes:

a communication module 1;

and a control module 2, the control module 2 being communicatively connected with the communication module to communicate with an external system 7, such as a BMS, through the communication module 1. The control module 2 is further configured to be in communication connection with the battery protection board 8, and usually, the battery protection board 8 may be connected to a signal input end of the control module 2 through a signal line to establish communication between the control module 2 and the battery protection board 8, after the battery protection board 8 is in communication with the control module 2, the control module 2 is in communication with the external system 7 through the communication module 1, and communication between the battery protection board 8 and the external system 7 is achieved through a protocol conversion program built in the control module 2.

The signal output end of the control module 2 is connected with the signal input end of the prompt module 3, the control module 2 controls the operation of the prompt module 3 according to the communication state of the battery protection board 8 and the external system 7 so as to send different prompt information to an operator, and the operator can intuitively master the communication state between the battery protection board 8 and the external system 7.

The USB interface module 4 is electrically connected with the control module 2 and used for supplying power to the control module 2, the circuit connection structure of the USB interface module 4 is specifically shown in figure 5, and the USB interface module 4 is connected with a USB interface of a computer host and supplies power to the control module 2 through the USB interface.

The first power module 5, the first power module 5 is connected with the communication module 1, the prompt module 3 electricity respectively and is used for supplying power.

And a signal output end of the control module 2 is connected with a signal input end of the second power module 6, a voltage input end of the second power module 6 is used for accessing power supply voltage, and a voltage output end is connected with a voltage input end of the battery protection board 8 so as to supply power for the battery protection board 8 through the second power module 6.

The working process of the communication conversion circuit is as follows, the USB interface module 4 is connected into the electrified USB socket, the first power module 5 is started, and the communication module 1 and the prompt module 3 are electrified and started. And starting a self-powered system of the battery protection board 8 to electrify the battery protection board 8 to work. Connect battery protection board 8 with control module 2's signal input part through the signal line to establish the communication between control module 2 and the battery protection board 8, carry out protocol conversion through control module 2, then through communication module 1 and external system 7, if the communication is established to BMS, at the in-process with BMS communication, control module 2 is according to communication module 1 and BMS's communication state, if when trying with BMS communication, when successfully communicating with BMS, BMS reports wrong time control prompt module 3 and sends different prompt message respectively, until circuit protection board and BMS successfully communicate.

When the self-powered discharge port of the battery protection board 8 is accidentally closed, the control module 2 controls the second power module 6 to start to supply power to the battery protection board 8, so that the battery protection board 8 is kept electrified, and stable communication between the battery protection board 8 and the BMS is realized.

According to the operation control method and the operation control device, the control module 2 and the prompt module 3 are arranged, the control module 2 controls the operation of the prompt module 3 according to the communication state between the battery protection board 8 and the external system 7, and different prompt messages are respectively sent when the communication module 1 tries to communicate with the BMS, successfully communicates with the BMS and reports errors of the BMS, so that an operator can intuitively master the communication state between the battery protection board 8 and the external system 7, and convenience is brought to the operation of the operator during the communication of the BMS;

the control module 2 disclosed by the invention adopts the USB interface for power supply, the USB interface is more universal in power supply mode, and the power supply is more stable, so that the working process of the communication converter is more stable;

this is disclosed is connected with battery protection shield 8 electricity through setting up second power module 6 to for battery protection shield 8 power supply under control module's 2 control, can open second power module 6 for battery protection shield 8 power supply when battery protection shield 8 self-powered discharge opening is closed, keep the communication between battery protection shield 8 and the BMS, improved communication process's stability.

Further, in this embodiment, please refer to fig. 2 in detail, the communication module 1 includes a transceiver chip TCAN1042, the transceiver chip TCAN1042 communicates with the external system 7 through a CAN bus, and a pin wiring diagram between the transceiver chip TCAN1042 and the MCU is shown in fig. 2, the transceiver chip TCAN1042 has the advantages of stable signal transceiving and low energy consumption, and the CAN bus communication has the advantages of simple architecture, mature application, and good versatility.

Further, in this embodiment, please refer to fig. 3 in detail, the communication module 1 further includes an isolation interface chip Nirs21, the transceiver chip TCAN1042 is in communication connection with the control module 2 through the isolation interface chip Nirs21, and the isolation interface chip Nirs21 is used to reduce signal crosstalk, so that the communication between the communication module 1 and the control module 2 is stable.

Further, in this embodiment, please refer to fig. 4 in detail, the control module 2 includes an STM32 series MCU, and the STM32 series MCU has advantages of high performance, low cost, and low power consumption.

Further, in this embodiment, the prompt module 3 includes an indicator light and a speaker, and the control module 2 controls the indicator light to emit different light colors and controls the speaker to emit different prompt sounds according to the communication status between the battery protection board 8 and the external system 7, so that an operator can intuitively grasp the communication status between the battery protection board 8 and the external system 7.

Further, in the present embodiment, referring to fig. 6 and 7 in detail, the first power module 5 includes a first DC-DC power chip; the second power module 6 comprises a second DC-DC power chip, and more specifically, the first DC-DC power chip and the second DC-DC power chip are both power chips B0515S, and the power chips B0515S can provide stable direct current voltage to stably supply power to the communication module 1, the prompt module 3 and the battery protection board 8.

Further, in the present embodiment, please continue to refer to fig. 7, the second power module 6 further includes:

the switching element is connected to an external voltage, such as +5V voltage shown in fig. 7, and a voltage input end of the second DC-DC power supply chip, a signal output end of the control module 2 is connected to a control end of the switching element for controlling on/off of the switching element, specifically, the switching element is an MOS transistor, a source of the MOS transistor is connected to +5V voltage, a drain of the MOS transistor is connected to a voltage input end of the second DC-DC power supply chip, one output pin of the MCU is connected to a gate of the MOS transistor, and a voltage output end of the second DC-DC power supply chip is connected to a power end of the battery protection board 8. When the control module 2 outputs a conducting signal to the grid electrode of the MOS tube, the MOS tube is conducted, and the +5V voltage outputs +15V voltage to the battery protection board 8 through the boosting and voltage stabilizing action of the second DC-DC power supply chip, so that the battery protection board 8 is connected with high-voltage current to keep the power-on operation. The second power module 6 can supply power to the battery protection board 8 under the control of the control module 2, and when the self-powered discharge port of the battery protection board 8 is closed, the second power module 6 can be turned on to supply power to the battery protection board 8, so that the communication between the battery protection board 8 and the BMS is maintained, and the stability of the communication process is improved.

The embodiment also provides a communication converter, which comprises the communication conversion circuit, so that the communication converter can control the prompt module 3 to send out a corresponding prompt according to the communication state, and an operator can conveniently and visually master the communication state; the control module 2 adopts a more universal and more stable USB interface to supply power; the second power module 6 supplies power to the battery protection board 8, so that the battery protection board 8 can be powered and communicated with the outside when being powered off, and the stability of the communication process is improved.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the present disclosure, and in the absence of a contrary explanation, these directional terms are not intended to indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present disclosure.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present disclosure.

Claims (10)

1. A communication conversion circuit, comprising:

a communication module;

the control module is in communication connection with the communication module so as to communicate with an external system through the communication module, and is also used for being in communication connection with the battery protection board and enabling the battery protection board to communicate with the external system through protocol conversion;

the signal output end of the control module is connected with the signal input end of the prompting module, and the control module controls the operation of the prompting module according to the communication state of the battery protection board and an external system;

the USB interface module is electrically connected with the control module and used for supplying power to the control module;

the first power supply module is respectively and electrically connected with the communication module and the prompt module for supplying power;

and the signal output end of the control module is connected with the signal input end of the second power module and used for supplying power to the battery protection board according to the control of the control module.

2. The communication conversion circuit of claim 1, wherein the communication module comprises a TCAN1042, and the TCAN1042 communicates with an external system through a CAN bus.

3. The communication conversion circuit of claim 2, wherein the communication module further comprises an isolation interface chip Nirs21, and the transceiver chip TCAN1042 is communicatively connected to the control module through the isolation interface chip Nirs 21.

4. The communication conversion circuit of claim 1, wherein the control module comprises an STM32 series MCU.

5. The communication conversion circuit of claim 1, wherein the prompting module comprises an indicator light and a speaker.

6. The communication conversion circuit of claim 1, wherein the first power module comprises a first DC-DC power chip; the second power module includes a second DC-DC power chip.

7. The communication conversion circuit of claim 6, wherein the first DC-DC power chip and the second DC-DC power chip are both power chips B0515S.

8. The communication conversion circuit of claim 6, wherein the second power module further comprises:

and the signal output end of the control module is connected with the control end of the switching element and is used for controlling the on-off of the switching element.

9. The communication conversion circuit of claim 8, wherein the switching element is a MOS transistor.

10. A communication converter comprising a communication conversion circuit according to any of claims 1-9.

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