CN211208607U - Monitoring device for battery management system and battery management system - Google Patents
Monitoring device for battery management system and battery management system Download PDFInfo
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- CN211208607U CN211208607U CN201922455835.7U CN201922455835U CN211208607U CN 211208607 U CN211208607 U CN 211208607U CN 201922455835 U CN201922455835 U CN 201922455835U CN 211208607 U CN211208607 U CN 211208607U
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- battery management
- clock circuit
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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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Abstract
The utility model provides a monitoring device and battery management system for battery management system belongs to electron technical field. The monitoring device for a battery management system includes: the switch module is connected with an external power supply and the clock circuit in series, and a branch formed by connecting the switch module and the external power supply in series is connected with the standby power supply in parallel; and a processing module, connected in series with the backup power supply, for: when the clock circuit is powered by the standby power supply and the external power supply supplies power to the clock circuit and the battery management system, controlling the switch module to be switched off so that the standby power supply supplies power to the clock circuit; and detecting the working voltage of the standby power supply. Monitoring device can realize the monitoring to stand-by power supply, can in time discover before stand-by power supply electric quantity exhausts whether it is about to become invalid, effectively improve entire system's job stabilization nature and security.
Description
Technical Field
The utility model relates to the field of electronic technology, specifically relate to a monitoring device and battery management system for battery management system.
Background
The BMS (Battery Management System), which is a core component of a Battery System, is a System for managing a Battery, and is capable of dynamically detecting data of voltage, current, temperature, insulation resistance, etc. of the Battery, and performing operations such as state estimation, Battery equalization Management, thermal Management, contactor control, fault diagnosis, alarm, etc. according to the detected data, the BMS may perform real-time communication with an external energy storage controller through a CAN bus, RS485, and ethernet communication, and display necessary information to a user in real time through a display System.
The BMS is supplied with power by an external power supply when working, and the external power supply is powered off when not working, and the BMS stops working because of no external power supply input at the moment. When the BMS calculates the initial remaining power at each time of power on, it is necessary to determine whether to correct the initial remaining power according to a time length for which the BMS stops operating, so that the BMS needs to have a real-time clock function, i.e., when the external power supply is powered off, the BMS still maintains a timing function and provides accurate current time data at any time.
In order to solve the technical problems, the implementation method of the prior art adopts the button cell as a standby power supply of the clock circuit, when the external power supply is powered on, the external power supply supplies power to the clock circuit, and when the external power supply is powered off, the button cell supplies power to the clock circuit, so that the BMS can still accurately time under the condition of power failure. The schematic circuit diagram of the clock circuit powered by the button cell is shown in fig. 1, and the external power supply and the button cell are respectively connected with the clock circuit in series.
The inventor of the application finds that the battery management system is also commonly applied to large-scale wind and light power stations, usually in remote areas and unattended areas, the method of using the button battery as a standby power supply of the clock circuit at present solves the timing function of the BMS under the condition of external power failure, but lacks the diagnosis of the state of the button battery, when the electric quantity of the button battery is exhausted and cannot supply power normally, a worker cannot learn in time, the clock timing is inaccurate or the timing is stopped after the system is powered off, so that the initial value of the residual electric quantity of the system cannot be corrected, the energy storage battery has the risk of overcharge or overdischarge, and the whole system cannot work normally and has potential safety hazards.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to a monitoring device and a battery management system for a battery management system to solve the problem that the battery management system is prone to fail to work due to the fact that the state of the standby power supply supplying power to the clock circuit is not monitored in the prior art
In order to achieve the above purpose, the technical solution of the present invention is realized as follows:
a monitoring device for a battery management system provided with a clock circuit and a backup power supply for supplying power to the clock circuit in a case where an external power supply stops supplying power to the battery management system, comprising: the switch module is connected with the external power supply and the clock circuit in series, and a branch formed by connecting the switch module and the external power supply in series is connected with the standby power supply in parallel; and a processing module, connected in series with the backup power supply, for: when the clock circuit is powered by the standby power supply and the external power supply supplies power to the clock circuit and the battery management system, controlling the switch module to be switched off so that the standby power supply supplies power to the clock circuit; and detecting the working voltage of the standby power supply.
Furthermore, the processing module is further configured to control the switch module to be closed after the processing module detects the working voltage of the standby power supply.
Furthermore, the monitoring device for the battery management system further comprises a warning module, connected to the processing module, and configured to send a warning signal when the processing module determines that the operating voltage is less than the preset value.
Further, the preset value is the termination voltage of the standby power supply.
Further, the processing module is a processor of the battery management system.
Further, the monitoring device for the battery management system further comprises a diode, and the external power supply, the switch module, the diode and the clock circuit are connected in series.
Further, the anode of the diode is connected to the switch module, and the cathode of the diode is connected to the input end of the clock circuit.
Further, the standby power supply is a button battery.
Compared with the prior art, a monitoring device for battery management system have following advantage:
(1) the embodiment of the utility model provides a monitoring device for battery management system make processing module can detect the operating voltage when stand-by power supply supplies power for clock circuit through the switch action to the realization has advantage with low costs, simple structure and easy realization to battery management system's control.
(2) The embodiment of the utility model provides a monitoring device for battery management system, can in time send alarm information before stand-by power supply's electric quantity exhausts, the suggestion maintainer in time changes stand-by power supply, has effectively improved entire system's reliability and security.
Another object of the present invention is to provide a battery management system, which solves the problem that the prior art does not monitor the state of the standby power supply supplying power for the clock circuit, resulting in the battery management system being unable to work easily.
In order to achieve the above purpose, the technical solution of the present invention is realized as follows:
a battery management system provided with a monitoring device for a battery management system as claimed in any one of the preceding claims.
The advantages of the battery management system and the monitoring device for the battery management system are the same as those of the monitoring device for the battery management system in comparison with the prior art, and are not described herein again.
Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:
FIG. 1 is a schematic circuit diagram of a button cell for powering a clock circuit;
fig. 2 is a block diagram of a monitoring device for a battery management system according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a monitoring device for a battery management system according to an embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating the working principle of the monitoring device for a battery management system according to the embodiment of the present invention.
Description of the reference numerals
210 switch module 220 external power supply
230 clock circuit 240 standby power supply
250 processing module
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.
Under a normal working condition, an external power supply is adopted to supply power to the battery management system, when the external power supply is powered off, namely the power supply of the battery management system is stopped, the battery management system stops working due to power off, in order to reduce the influence of the power off on the judgment of the battery management system on the monitored residual electric quantity of the battery, a clock circuit connected with the battery management system is arranged, and the clock circuit is used for assisting the battery management system to determine the power off time of the battery management system. When the external power supply can supply power, the external power supply can simultaneously supply power to the clock circuit, and when the external power supply is in a power-off state, the standby power supply supplies power to the clock circuit, so that the clock circuit can continuously work. Consider that stand-by power supply also can appear the electric quantity not enough and the condition of stopping the power supply, based on this, the utility model provides a monitoring device for battery management system.
Fig. 2 is a block diagram of a monitoring device for a battery management system according to an embodiment of the present invention. As shown in fig. 2, the monitoring apparatus for a battery management system includes a switch module 210 and a processing module 250. The switch module, the external power supply 220 for supplying power to the battery management system and the clock circuit 230 of the battery management system are connected in series, a branch formed by connecting the switch module 210 and the external power supply 220 in series is connected in parallel with the standby power supply 240 for supplying power to the clock circuit 230, and the standby power supply 240 is further used for being connected in series with the processing module 250.
In the case that the external power source 220 stops supplying power to the battery management system, the standby power source 240 can automatically supply power to the clock circuit 230 to ensure that the clock circuit 230 is always in a working state, so that the battery management system can accurately determine the power-off time of the battery management system.
When the battery management system is switched from the power-off state to the power-on state, the switch module 210 is turned off, so that the external power supply 220 supplies power to the battery management system, and the standby power supply 240 supplies power to the clock circuit 230, at this time, the processing module 250 connected in series with the standby power supply 240 can collect an electric signal output by the standby power supply 240 and determine the working voltage of the standby power supply 240, and it can be determined whether the standby power supply can continue to supply power to the clock circuit 230 when the external power supply 220 stops supplying power according to the working voltage of the standby power supply 240.
For example, the processing module 250 may compare the operating voltage of the backup power supply 240 with a preset value, and when the operating voltage is less than the preset value, determine that the backup power supply 240 fails and cannot operate any more.
Optionally, the preset value may be set according to the specific model of the backup power supply and the use environment. For example, the preset value may be the termination voltage obtained by testing before the standby power supply is put into use.
In order to reduce unnecessary power consumption, the processing module 250, after detecting the operating voltage of the backup power source 240, may control the switching module 210 to operate, switch from the open state to the closed state, so that the backup power source 240 stops outputting the electrical signal, and utilize the external power source 220 to supply power to the battery management system and the clock circuit 230, so as to maintain normal operation of the whole system.
The embodiment of the utility model provides a technical scheme confirms its electric quantity consumption state through the operating voltage who confirms stand-by power supply, when reducing product cost, can also effectively reduce because stand-by power supply electric quantity exhausts and lead to the unable system safety problem that arouses of clock circuit, guarantees the normal work of system.
In some optional embodiments, the utility model provides a monitoring device for battery management system can also include the module of warning that is connected with processing module, when processing module confirms that stand-by power supply's operating voltage is less than the default, confirms that stand-by power supply's electric quantity is not enough, consequently processing module can control the module of warning sends out the signal of warning.
Optionally, the warning module may be an alarm or an indicator light, or the warning module may also be a device that is provided in the battery management system and is capable of outputting a warning signal.
In some alternative embodiments, the processing module may be a separate processor having the functions of acquiring and processing the electrical signals, or may be a processor of the battery management system.
In some alternative embodiments, the backup power source may be a button cell.
In some optional embodiments, the monitoring apparatus for a battery management system may further be provided with a diode such that the external power supply, the switching module, the diode, and the clock circuit are connected in series for preventing a reverse current. For example, the positive terminal of the diode may be connected to the output terminal of the switching module and the negative terminal to the input terminal of the clock circuit.
Fig. 3 the utility model discloses an embodiment a circuit schematic diagram for monitoring device for battery management system, wherein, stand-by power supply is button cell, and processing module is battery management system's CPU, and switch module is simple switch K. The specific scheme provided by the embodiment of the present invention will now be explained in detail with reference to fig. 3.
As shown in fig. 3, the external power supply, the switch K, and the diode D1 are connected in series with the clock circuit, the external power supply is connected in series with the processor of the battery management system, the button cell is connected in series with the clock circuit, and the button cell is also connected in series with the processor of the battery management system.
When the switch K is closed and the external power supply does not supply power to the battery management system, the button battery supplies power to the clock circuit; when the battery management system is switched to the power-on state from the power-off state, the switch K is switched off, the button battery supplies power for the clock circuit while the external power supply supplies power for the battery management system, the processor of the battery management system can sample the electric signal output by the button battery at the moment, and after the sampling of the processor is finished, the switch K is controlled to be closed, so that the external power supply supplies power for the clock circuit at the same time.
The positive terminal of the diode D1 in fig. 3 is connected to the output terminal of the switch K, and the negative terminal is connected to the input terminal of the clock circuit, and the specific connection position of the diode D1 is not limited to that shown in fig. 3 as long as the influence of the reverse current on the circuit can be avoided.
Fig. 4 is a schematic flow chart illustrating the working principle of the monitoring device for a battery management system according to the embodiment of the present invention. As shown in fig. 4, the operation principle of the monitoring device for the battery management system is as follows:
(1) when the BMS is powered on and initialized under the condition that the external power supply supplies power again;
(2) the BMS controls the switch K to be switched off;
(3) the button Battery supplies power to the clock circuit, and the BMS measures the output Voltage Battery _ Measure _ Voltage at the two ends of the button Battery at the moment;
(4) if the output Voltage Battery _ Measure _ Voltage is greater than the operating cut-off Voltage Battery _ End _ Voltage of the button Battery, indicating that the button Battery operates in a normal state; if the output Voltage Battery _ Measure _ Voltage is smaller than the working cut-off Voltage Battery _ End _ Voltage of the button Battery, the button Battery is invalid and cannot provide normal power supply Voltage, and the Battery management system sends out a button Battery failure alarm to prompt maintenance personnel to replace the button Battery;
(5) after the system finishes collecting and diagnosing the button output voltage, the switch K is closed, and an external power supply simultaneously supplies power to the clock circuit, so that the normal operation of the system is ensured.
Correspondingly, the embodiment of the utility model provides a battery management system is still provided with the monitoring device who is used for battery management system as in any one above.
The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.
Claims (9)
1. A monitoring device for a battery management system provided with a clock circuit and a backup power supply for supplying power to the clock circuit in a case where an external power supply stops supplying power to the battery management system, comprising:
the switch module is connected with the external power supply and the clock circuit in series, and a branch formed by connecting the switch module and the external power supply in series is connected with the standby power supply in parallel; and
a processing module connected in series with the backup power supply for:
when the clock circuit is powered by the standby power supply and the external power supply supplies power to the clock circuit and the battery management system, controlling the switch module to be switched off so that the standby power supply supplies power to the clock circuit; and
and detecting the working voltage of the standby power supply.
2. The monitoring device of claim 1, wherein the processing module is further configured to control the switch module to close after the processing module detects the operating voltage of the backup power source.
3. The monitoring device for a battery management system according to claim 1, further comprising an alarm module connected to the processing module for sending an alarm signal when the processing module determines that the operating voltage is less than a predetermined value.
4. The monitoring device for a battery management system according to claim 3, wherein the preset value is an end voltage of the backup power supply.
5. The monitoring device for a battery management system according to claim 1, wherein the processing module is a processor of the battery management system.
6. The monitoring device for a battery management system according to claim 1, wherein the monitoring device for a battery management system further comprises a diode, and the external power supply, the switching module, the diode, and the clock circuit are connected in series.
7. The monitoring device for a battery management system according to claim 6, wherein the anode of the diode is connected to the switching module and the cathode is connected to the input of the clock circuit.
8. The monitoring device for a battery management system of claim 1, wherein the backup power source is a button cell battery.
9. A battery management system provided with a monitoring device for a battery management system according to any one of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922455835.7U CN211208607U (en) | 2019-12-30 | 2019-12-30 | Monitoring device for battery management system and battery management system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922455835.7U CN211208607U (en) | 2019-12-30 | 2019-12-30 | Monitoring device for battery management system and battery management system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969713A (en) * | 2020-08-20 | 2020-11-20 | 北京浪潮数据技术有限公司 | Monitoring device for real-time clock battery |
| CN112034974A (en) * | 2020-08-22 | 2020-12-04 | 深圳市海曼科技股份有限公司 | Clock chip power supply switching method, device, terminal and medium |
| CN112366803A (en) * | 2020-11-06 | 2021-02-12 | 杭州叙简未兰电子有限公司 | Power supply method, power supply circuit and law enforcement recorder |
| CN112491115A (en) * | 2020-11-25 | 2021-03-12 | 四川长虹电器股份有限公司 | Power supply management circuit for standby rechargeable battery |
| CN113489100A (en) * | 2021-07-09 | 2021-10-08 | 上海海得控制系统股份有限公司 | RTC clock power supply circuit |
-
2019
- 2019-12-30 CN CN201922455835.7U patent/CN211208607U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969713A (en) * | 2020-08-20 | 2020-11-20 | 北京浪潮数据技术有限公司 | Monitoring device for real-time clock battery |
| CN112034974A (en) * | 2020-08-22 | 2020-12-04 | 深圳市海曼科技股份有限公司 | Clock chip power supply switching method, device, terminal and medium |
| CN112034974B (en) * | 2020-08-22 | 2021-12-24 | 深圳市海曼科技股份有限公司 | Clock chip power supply switching method, device, terminal and medium |
| CN112366803A (en) * | 2020-11-06 | 2021-02-12 | 杭州叙简未兰电子有限公司 | Power supply method, power supply circuit and law enforcement recorder |
| CN112491115A (en) * | 2020-11-25 | 2021-03-12 | 四川长虹电器股份有限公司 | Power supply management circuit for standby rechargeable battery |
| CN113489100A (en) * | 2021-07-09 | 2021-10-08 | 上海海得控制系统股份有限公司 | RTC clock power supply circuit |
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