CN111030257A - Communication protection device and method - Google Patents
Communication protection device and method Download PDFInfo
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- CN111030257A CN111030257A CN201911422843.XA CN201911422843A CN111030257A CN 111030257 A CN111030257 A CN 111030257A CN 201911422843 A CN201911422843 A CN 201911422843A CN 111030257 A CN111030257 A CN 111030257A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a communication protection device and a method, wherein the communication protection device comprises: the isolation power supply comprises a main control module, an isolation power supply module and an isolation control module, wherein the main control module is connected with the isolation power supply module, the isolation power supply module is connected with the isolation control module, and the isolation power supply module is used for providing isolation voltage to the isolation control module. The invention also discloses a communication protection method. The invention can realize normal communication of the device while charging and discharging protection is carried out on the BMS.
Description
Technical Field
The present invention relates to a communication device protection apparatus, and in particular, to a communication protection apparatus and method.
Background
At present, a battery management system is generally provided with a plurality of communication interfaces, for the safe and reliable operation of the battery management system, charging and discharging protection functions are generally required, if the charging and discharging protection is arranged at a positive end, the driving device required by the positive end is expensive, and the input cost is increased, if the charging and discharging protection is arranged at a negative end, when the battery discharging protection is carried out, the discharging negative end can be pulled to the positive end due to the load effect, so that the high voltage of the battery is directly transmitted to the communication device, the communication device is easy to damage, the common ground problem of communication output can be influenced by the protection at the negative end, the requirement condition on the performance of an MOS (metal oxide semiconductor) transistor for switching between high and low levels is particularly high, and the MOS transistor is damaged in capacity when short circuit and external abnormal voltage impact occur.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a communication protection device which can realize normal communication of the device while charging and discharging protection of the BMS is realized.
The invention also provides a communication protection method.
In a first aspect, an embodiment of the present invention provides a communication protection apparatus, including:
the isolation power supply comprises a main control module, an isolation power supply module and an isolation control module, wherein the main control module is connected with the isolation power supply module, the isolation power supply module is connected with the isolation control module, and the isolation power supply module is used for providing isolation voltage to the isolation control module.
The communication protection device of the embodiment of the invention at least has the following beneficial effects: the hardware environment that provides communication protection when can carry out charge-discharge protection for BMS to make BMS charge-discharge in-process not influence normal communication.
According to other embodiments of the present invention, the communication protection device further comprises an acquisition module, wherein the acquisition module comprises a first resistor and an acquisition chip, and is used for acquiring voltage and/or current signals.
According to other embodiments of the present invention, a communication protection device includes a switch module, where the switch module includes a charging protection switch module and a discharging protection switch module, and the charging protection switch module and the discharging protection switch module are respectively connected to the acquisition module.
According to another embodiment of the present invention, the communication protection apparatus further includes a communication module, the communication module is connected to the isolation control module, and the communication module is further connected to the main control module.
According to another embodiment of the present invention, the communication protection device further includes a power supply module, the power supply module is connected to the isolated power supply module, and the power supply module is further connected to the main control module, and is configured to provide power input to the isolated power supply module and the main control module.
According to another embodiment of the present invention, the isolated power module comprises an isolated power chip and a transformer, a first diode, a second diode, a first capacitor, a second capacitor, a third capacitor, and a second resistor, wherein a first end of the first capacitor is connected to a fifth pin of the isolated power chip, a second end of the first capacitor is connected to a first pin, a second pin, and a third pin of the isolated power chip, a fifth pin of the isolated power chip is connected to a second pin of the transformer, a sixth pin of the isolated power chip is connected to a first pin of the transformer, a fourth pin of the isolated power chip is connected to a third pin of the transformer, a fourth pin of the transformer is connected to the second diode, a fifth pin of the transformer is grounded, and a sixth pin of the transformer is connected to the first diode, the second end of the first diode is connected with the first end of the second capacitor, the second end of the second diode is also connected with the first end of the second capacitor, the second end of the first diode and the second end of the second diode are also connected with the first end of the second resistor, the second end of the first diode and the second end of the second diode are also connected with the first end of the third capacitor, and the second end of the second capacitor, the second end of the second resistor and the second end of the third capacitor are grounded.
According to another embodiment of the present invention, the isolation controller module includes a fourth capacitor, a fifth capacitor, and an isolation chip, a first end of the fourth capacitor is connected to the first pin of the isolation chip, a second end of the fourth capacitor is connected to the fourth pin of the isolation chip, an eighth pin of the isolation chip is connected to the power isolation module, the eighth pin of the isolation chip is further connected to the first end of the fifth capacitor, and a second end of the fifth capacitor is connected to the fifth pin of the isolation chip.
In a second aspect, an embodiment of the present invention provides a communication protection method, including:
the isolation voltage module acquires an isolation voltage;
providing the isolation voltage to an isolation control module;
the isolation control module protects the communication module.
The communication protection method of the embodiment of the invention at least has the following beneficial effects: the communication module can be provided with isolation protection, and the communication module is prevented from being damaged due to high voltage influence.
According to another embodiment of the present invention, a communication protection method includes converting a first communication signal into a second communication signal by the isolation control module, where the first communication signal is an input voltage and/or current communication signal, and the second communication signal is an output voltage and/or current communication signal.
The embodiment can protect the charging and discharging of the BMS and simultaneously does not influence the input and output of the communication signals.
Drawings
Fig. 1 is a block diagram of a charging and discharging protection device according to an embodiment of the present invention;
fig. 2 is another block diagram of another embodiment of a charging and discharging protection device according to the present invention;
fig. 3 is a block diagram of another embodiment of a charging and discharging protection device according to the present invention;
fig. 4 is a block diagram of another embodiment of a charging and discharging protection device according to the present invention;
fig. 5 is another block diagram of another embodiment of a charging and discharging protection device according to the present invention;
FIG. 6 is a schematic circuit diagram of a charge/discharge protection device according to an embodiment of the present invention;
fig. 7 is a diagram of an application scenario of a charging and discharging protection device according to an embodiment of the present invention.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "greater than", "lower" or "inner" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
To facilitate a better understanding of the present invention, the following embodiments are developed with the communication protection in the BMS system as an example.
Example 1: referring to fig. 1, a block diagram of a charging and discharging protection device according to an embodiment of the present invention includes: the isolation power supply comprises a main control module, an isolation power supply module and an isolation control module, wherein the main control module is connected with the isolation power supply module, the isolation power supply module is connected with the isolation control module, and the isolation power supply module is used for providing isolation voltage to the isolation control module.
Specifically, the isolation power supply module can provide proper power supply input for the isolation control module, and the operation stability of the whole communication protection device is ensured.
It can be understood that the communication protection is modularly processed by the modular design in the embodiment, and the reason for the design is that the portability of the module is convenient, and the communication protection module can be more flexibly applied to other similar or similar products or devices or systems, so as to improve the application value of the invention.
Specifically, referring to fig. 2 and fig. 7, another block diagram of the charge and discharge protection device in the embodiment of the present invention is shown; the communication protection device further comprises an acquisition module, wherein the acquisition module 60 comprises a first resistor 21 and an acquisition chip for acquiring voltage and/or current signals.
Specifically, the acquisition chip in this embodiment is a DAM-8021 series product, and the acquisition chip can provide industrial applications, dual isolation protection, low temperature drift and low power consumption, and can provide reliable voltage/current signals for the main control module, so as to provide accurate communication signals to be transmitted to the communication module for output.
Specifically, the acquisition module and the main control module communicate with each other through an I2C or SPI bus, and the device has the advantages of being simple to operate and high in data transmission rate.
Example 2: referring to fig. 3, a block diagram of a charging and discharging protection device according to another specific embodiment of the present invention is shown, and in this embodiment, on the basis of embodiment 2, the charging and discharging protection device further includes a switch module, where the switch module includes a charging protection switch module and a discharging protection switch module, and the charging protection switch module and the discharging protection switch module are respectively connected to the acquisition module.
Specifically, the charging protection switch module and the discharging protection switch module may be MOS transistors or other devices that can be used as switches, wherein the charging protection switch module is used to protect the communication module when the BMS battery pack is charged, and wherein the discharging protection switch module is used to protect the communication module when the BMS battery pack is discharged.
Example 3: referring to fig. 4, a block diagram of another specific embodiment of the charging and discharging protection device in the embodiment of the present invention further includes a communication module on the basis of embodiment 3, where the communication module is connected to the isolation control module, and the communication module is also connected to the main control module.
Wherein, communication module CAN provide external communication's interface, also CAN regard as internal communication's interface, plays the effect of bridge to internal and external communication, is the necessary link of guaranteeing that the communication is normal when carrying out BMS charge-discharge protection, and simultaneously, communication module in this embodiment CAN choose for use according to actual scene is nimble, CAN choose for use RS232 communication module, RS485 communication module, CAN communication module etc. for use.
The power supply module is connected with the isolation power supply module, and the power supply module is further connected with the main control module and used for providing power input for the isolation power supply module and the main control module.
The power supply module may be the BMS battery pack according to the present invention, or may be other power supply devices, such as other storage batteries or power supply sources capable of providing +5V power.
Referring to fig. 5, the present embodiment further includes a load, wherein the load is connected to the communication module, the type of the load may be selected according to the actual application of a user, and the load may be a charger or other types of loads.
Example 4: referring to fig. 6, which is a schematic circuit diagram of a specific embodiment of the charging and discharging protection device in the embodiment of the present invention, on the basis of embodiment 1, this embodiment performs an internal circuit design on an isolated power supply module therein.
Specifically, the circuit comprises an isolation power chip 30, a transformer 40, a first diode 61, a second diode 62, a first capacitor 11, a second capacitor 12, a third capacitor 13 and a second resistor 22, wherein a first end of the first capacitor 11 is connected with a fifth pin of the isolation power chip 30, a second end of the first capacitor 11 is connected with a first pin, a second pin and a third pin of the isolation power chip 30, the fifth pin of the isolation power chip 30 is connected with a second pin of the transformer 40, a sixth pin of the isolation power chip 30 is connected with a first pin of the transformer 40, a fourth pin of the isolation power chip 30 is connected with a third pin of the transformer 40, a fourth pin of the transformer 40 is connected with the second diode 62, the fifth pin of the transformer 40 is grounded, the sixth pin of the transformer 40 is connected with the first diode 61, a second end of the first diode 61 is connected with a first end of the second capacitor 12, a second end of the second diode 62 is also connected with a first end of the second capacitor 12, the second terminal of the first diode 61 and the second terminal of the second diode 62 are also connected to the first terminal of the second resistor 22, the second terminal of the first diode 61 and the second terminal of the second diode 62 are also connected to the first terminal of the third capacitor 13, and the second terminal of the second capacitor 12, the second terminal of the second resistor 22 and the second terminal of the third capacitor 13 are grounded.
Specifically, the isolation controller module includes a fourth capacitor 14, a fifth capacitor 15, and an isolation chip 50, where a first end of the fourth capacitor 14 is connected to the first pin of the isolation chip 50, a second end of the fourth capacitor 14 is connected to the fourth pin of the isolation chip 50, an eighth pin of the isolation chip 50 is connected to the power isolation module, the eighth pin of the isolation chip 50 is further connected to the first end of the fifth capacitor 15, and a second end of the fifth capacitor 15 is connected to the fifth pin of the isolation chip 50.
The isolation power supply chip is used in the embodiment because the isolation power supply chip can play a role in short-circuit protection in the whole device, the withstand voltage at the pin can reach 40V, and effective and stable voltage output can be provided for the whole device.
The isolating chip is pi 122U31 in model number, the maximum propagation delay is 3.6ns and the pulse width distortion is less than 0.3ns in the communication protection device under the working condition of 5V, and the isolating chip can play a good high-voltage isolating role under the condition that the communication signal is not distorted.
Example 5: referring to fig. 7, which is an application scenario diagram of a specific embodiment of the charge and discharge protection device in the embodiment of the present invention, wherein the sampling module 60 is connected to the sampling resistor 21, the sampling module 60 is connected to the main control module 100, the main control module 100 is connected to the power supply module 110, the main control module 100 is connected to the communication module 70, and the port a and the port B are communication output ports and provide port connection for communication connection devices.
Specifically, the sampling module connects the BMS charge protection module 80 and the BMS discharge protection module 90 at the same time, wherein the sampling resistor 21, the BMS charge protection module 80 and the BMS discharge protection module 90 are connected at the negative terminal of the BMS system and are connected at this negative terminal, B-in fig. 7-represents the negative terminal of the BMS battery, B + represents the positive terminal of the BMS battery, at the output port, P-represents the output negative terminal, which is connected to the negative terminal of the load, P + represents the output positive terminal, which is connected to the positive terminal of the load.
It can be understood that this embodiment plays a critical role in understanding the whole scheme, the BMS charging and discharging protection module is arranged at the negative terminal of the BMS battery pack or the BMS management system, and since the communication module 70 is grounded to the negative terminal of the BMS battery pack or the BMS management system, the normal communication function is not affected while the BMS charging and discharging protection is realized.
The charging protection module 80 and the discharging protection module 90 may use MOS transistors as switching devices, or may use other devices capable of replacing switching functions as protection modules.
s100: the isolation voltage module acquires an isolation voltage;
s200: providing the isolation voltage to an isolation control module;
s300: the isolation control module protects the communication module.
The steps in this embodiment further include:
s400: the first communication signal is converted into a second communication signal through the isolation control module, wherein the first communication signal is an input voltage and/or current communication signal, and the second communication signal is an output voltage and/or current communication signal.
The embodiment can transmit the isolation voltage to the communication module by providing the isolation control module with the isolation voltage, and effectively protect the communication module, so that the signal can be transmitted to the output end of the signal module without distortion when the signal is input at the input end of the communication module, and the beneficial effect of ensuring that the signal transmission is not influenced by external factors is achieved.
The communication module of the above embodiment includes an RS232 module, an RS485 module, and a CAN module, but is not limited to the above communication module, and the application of the present invention may be performed according to a communication module provided in an actual application situation.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (9)
1. A communication protection device, comprising:
the isolation power supply comprises a main control module, an isolation power supply module and an isolation control module, wherein the main control module is connected with the isolation power supply module, the isolation power supply module is connected with the isolation control module, and the isolation power supply module is used for providing isolation voltage to the isolation control module.
2. The communication protection device according to claim 1, further comprising an acquisition module, wherein the acquisition module is connected to the main control module, and the acquisition module comprises a first resistor and an acquisition chip, and is configured to acquire a voltage and/or current signal.
3. The communication protection device according to claim 2, further comprising a switch module, wherein the switch module is connected to the collection module, the switch module comprises a charge protection switch module and a discharge protection switch module, and the charge protection switch module and the discharge protection switch module are respectively connected to the collection module.
4. The communication protection device according to claim 3, further comprising a communication module, wherein the communication module is connected to the main control module, and the communication module is further connected to the isolation control module.
5. The communication protection device according to claim 4, further comprising a power supply module, wherein the power supply module is connected to the isolated power supply module, and the power supply module is further connected to the main control module, and is configured to provide power input to the isolated power supply module and the main control module.
6. The communication protection device of claim 1, wherein the isolated power module comprises an isolated power chip and a transformer, a first diode, a second diode, a first capacitor, a second capacitor, a third capacitor, and a second resistor, wherein a first end of the first capacitor is connected to a fifth pin of the isolated power chip, a second end of the first capacitor is connected to the first pin, the second pin, and the third pin of the isolated power chip, the fifth pin of the isolated power chip is connected to the second pin of the transformer, the sixth pin of the isolated power chip is connected to the first pin of the transformer, the fourth pin of the isolated power chip is connected to the third pin of the transformer, the fourth pin of the transformer is connected to the second diode, the fifth pin of the transformer is grounded, and the sixth pin of the transformer is connected to the first diode, the second end of the first diode is connected with the first end of the second capacitor, the second end of the second diode is also connected with the first end of the second capacitor, the second end of the first diode and the second end of the second diode are also connected with the first end of the second resistor, the second end of the first diode and the second end of the second diode are also connected with the first end of the third capacitor, and the second end of the second capacitor, the second end of the second resistor and the second end of the third capacitor are grounded.
7. The communication protection device according to claim 1, wherein the isolation control module comprises a fourth capacitor, a fifth capacitor, and an isolation chip, a first end of the fourth capacitor is connected to the first pin of the isolation chip, a second end of the fourth capacitor is connected to the fourth pin of the isolation chip, an eighth pin of the isolation chip is connected to the power isolation module, the eighth pin of the isolation chip is further connected to the first end of the fifth capacitor, and a second end of the fifth capacitor is connected to the fifth pin of the isolation chip.
8. A communication protection method applied to the apparatus according to any one of claims 1 to 7, comprising the steps of:
the isolation voltage module acquires an isolation voltage;
providing the isolation voltage to an isolation control module;
the isolation control module protects the communication module.
9. The communication protection method according to claim 8, further comprising: the first communication signal is converted into a second communication signal through the isolation control module, the first communication signal is an input voltage and/or current communication signal, and the second communication signal is an output voltage and/or current communication signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422843.XA CN111030257A (en) | 2019-12-31 | 2019-12-31 | Communication protection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422843.XA CN111030257A (en) | 2019-12-31 | 2019-12-31 | Communication protection device and method |
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| CN111030257A true CN111030257A (en) | 2020-04-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467842A (en) * | 2020-11-26 | 2021-03-09 | 广东电网有限责任公司 | Unmanned aerial vehicle battery charging management equipment |
| CN114696374A (en) * | 2020-12-11 | 2022-07-01 | 南京泉峰科技有限公司 | Charging device and charging system |
-
2019
- 2019-12-31 CN CN201911422843.XA patent/CN111030257A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467842A (en) * | 2020-11-26 | 2021-03-09 | 广东电网有限责任公司 | Unmanned aerial vehicle battery charging management equipment |
| CN112467842B (en) * | 2020-11-26 | 2023-02-17 | 广东电网有限责任公司 | Unmanned aerial vehicle battery charging management equipment |
| CN114696374A (en) * | 2020-12-11 | 2022-07-01 | 南京泉峰科技有限公司 | Charging device and charging system |
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