CN111525636A - Method and system for online safely collecting open-circuit voltage of lead-acid storage battery - Google Patents
Method and system for online safely collecting open-circuit voltage of lead-acid storage battery Download PDFInfo
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- CN111525636A CN111525636A CN202010305992.4A CN202010305992A CN111525636A CN 111525636 A CN111525636 A CN 111525636A CN 202010305992 A CN202010305992 A CN 202010305992A CN 111525636 A CN111525636 A CN 111525636A
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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
- 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
- H01M10/06—Lead-acid accumulators
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
- H01M10/4285—Testing apparatus
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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
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a method and a system for safely acquiring the open-circuit voltage of a lead-acid storage battery on line, which comprises the steps of connecting a management module on a connecting bus of the lead-acid storage battery and a charger in series; defining whether the lead-acid storage battery pack is fully charged, if so, disconnecting a charging loop of the charger from the management module; standing for a period of time at a standard temperature; respectively testing and recording the open-circuit voltage of each lead-acid storage battery by using a battery monitoring module; after the open-circuit voltage of each lead-acid storage battery is measured and recorded, the management module is connected with a charging loop of the charger, the open-circuit voltage is acquired on line on the premise of guaranteeing the safety of the system, the safety of the lead-acid storage batteries is improved, and therefore the safety of the direct-current power supply system for the station is guaranteed.
Description
Technical Field
The invention relates to the technical field of lead-acid storage battery application, in particular to a method and a system for safely acquiring open-circuit voltage of a lead-acid storage battery on line.
Background
A lead-acid battery is a storage battery with electrodes mainly made of lead and its oxides and electrolyte solution of sulfuric acid solution. In the discharge state of the lead-acid battery, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead; in a charged state, the main components of the positive electrode and the negative electrode are lead sulfate.
The working mode of the conventional lead-acid storage battery is generally a floating charge mode, when the lead-acid storage battery discharges to a set limit value and is charged by constant current and constant voltage, a charger carries out long-term floating charge on the lead-acid storage battery according to the set floating charge voltage value, a battery monitoring system collects and reports the single voltage, and the collected floating charge voltage is higher than the open-circuit voltage of the lead-acid storage battery, so that the real voltage information of the single storage battery cannot be obtained. At present, few ways for detecting the open-circuit voltage are not perfect enough, the open-circuit voltage of the lead-acid storage battery cannot be acquired on line on the premise of guaranteeing the system safety, and the method has great influence on safely obtaining the real voltage information of the single storage battery.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The invention is provided in view of the problems of the voltage detection of the prior lead-acid storage battery.
Therefore, the technical problem solved by the invention is as follows: the problem of current battery monitoring system can't gather the open circuit voltage of lead acid battery on line under the prerequisite of guarantee system security is solved.
In order to solve the technical problems, the invention provides the following technical scheme: a method for safely collecting the open-circuit voltage of a lead-acid storage battery on line comprises the steps of connecting a management module on a connecting bus of a lead-acid storage battery pack and a charger in series; defining whether the lead-acid storage battery pack is fully charged, if so, disconnecting a charging loop of the charger from the management module; standing for a period of time at a standard temperature; respectively testing and recording the open-circuit voltage of each lead-acid storage battery by using a battery monitoring module; and after the open-circuit voltage of each lead-acid storage battery is measured and recorded, the management module is connected with a charging loop of the charger.
As a preferred scheme of the method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line, the method comprises the following steps: connecting the management module in series with a connecting bus of the lead-acid storage battery pack and the charger, wherein the positive bus and the negative bus of the lead-acid storage battery pack are connected into the management module; and the management module is connected into the charger through a bus.
As a preferred scheme of the method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line, the method comprises the following steps: and when the charging current of the lead-acid storage battery pack is less than 0.005C during charging or the charging current does not change continuously for 5 hours, the lead-acid storage battery pack is defined to be fully charged, and the management module is disconnected from a charging loop of the charger.
As a preferred scheme of the method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line, the method comprises the following steps: when the management module is disconnected from a charging loop of the charger, the diode is used for ensuring the connectivity of the lead-acid storage battery pack and a discharging loop of the charger, and the normal discharging of the lead-acid storage battery pack is not influenced.
As a preferred scheme of the method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line, the method comprises the following steps: and after the management module is disconnected from a charging loop of the charger, standing the lead-acid storage battery for 24-36 hours at the temperature of 5-35 ℃.
As a preferred scheme of the method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line, the method comprises the following steps: and the temperature of the lead-acid storage battery pack is required to be defined to be consistent with the ambient temperature before the battery monitoring module is utilized to respectively test and record the open-circuit voltage of each lead-acid storage battery, and the open-circuit voltage is basically unchanged.
As a preferred scheme of the method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line, the method comprises the following steps: and when the difference between the temperature of the lead-acid storage battery pack and the ambient temperature is within +/-3 ℃, the temperature and the ambient temperature are defined to be consistent.
As a preferred scheme of the method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line, the method comprises the following steps: and a bypass module is connected in parallel into the management module.
In order to solve the technical problems, the invention also provides the following technical scheme: a system for safely acquiring the open-circuit voltage of a lead-acid storage battery on line comprises a management module, a charging module and a charging module, wherein the management module is connected in series with a connecting bus of a lead-acid storage battery pack and a charger and controls the disconnection and the connection of a charging loop of the charger; the battery monitoring module is used for testing and recording the open-circuit voltage of each lead-acid storage battery; the diode is configured in the management module and used for ensuring the connectivity of the lead-acid storage battery pack and a discharge loop of the charger; and the bypass module is connected in parallel into the management module and is used for playing a role of bypass when the management module is abnormal, so that the safety of the system is ensured.
As a preferred scheme of the system for safely acquiring the open-circuit voltage of the lead-acid storage battery on line, the system comprises the following steps: the management module comprises a detection unit for detecting the charging current condition of the lead-acid storage battery pack during charging; and the control unit is used for controlling the disconnection and the connection of the charging loop of the charger.
The invention has the beneficial effects that: the open-circuit voltage testing method collects the open-circuit voltage of the lead-acid storage battery under the condition that the normal work of the lead-acid storage battery is not influenced, the open-circuit voltage can reflect and judge the health state of the lead-acid storage battery more truly than the floating charge voltage, and the daily operation and maintenance work can be better guided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a flow chart of a method for safely acquiring open-circuit voltage of a lead-acid storage battery on line according to the invention;
FIG. 2 is a block diagram of a system for on-line safe acquisition of open-circuit voltage of a lead-acid battery according to the present invention;
FIG. 3 is a system structure diagram of a management module in the method for online and safe acquisition of open-circuit voltage of a lead-acid battery according to the present invention;
FIG. 4 is an internal schematic view of a management module;
fig. 5 is a schematic diagram of the operation of the management module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below, and it is apparent that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially in general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Meanwhile, in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and operate, and thus, cannot be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected and connected" in the present invention are to be understood broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The working mode of the conventional lead-acid storage battery is generally a floating charge mode, so that the real voltage information of the single storage battery cannot be obtained, the conventional few modes for detecting the open-circuit voltage are not perfect enough, the open-circuit voltage of the lead-acid storage battery cannot be acquired on line on the premise of ensuring the system safety, and the safety of obtaining the real voltage information of the single storage battery is greatly influenced.
Therefore, referring to fig. 1 and fig. 3 to 5, the present invention provides a method for online and safe collection of open-circuit voltage of a lead-acid battery, comprising: a method for safely acquiring open-circuit voltage of a lead-acid storage battery on line comprises the following steps:
the management module 100 is connected in series with a connecting bus of a lead-acid storage battery pack and a charger;
defining whether the lead-acid storage battery pack is fully charged, if so, disconnecting a charging loop with a charger by the management module 100;
standing for a period of time at a standard temperature;
respectively testing and recording the open-circuit voltage of each lead-acid storage battery by using a battery monitoring module 200;
after the open-circuit voltage of each lead-acid storage battery is measured and recorded, the management module 100 is connected with a charging loop of the charger.
Wherein, connecting management module 100 in series on the connecting bus of lead-acid battery and charger includes:
connecting positive and negative buses of a lead-acid storage battery pack into the management module 100;
the management module 100 is connected to the charger through a bus.
Further, when the charging current of the lead-acid storage battery pack is less than 0.005C during charging or the charging current does not change for 5 continuous hours, the lead-acid storage battery pack is defined to be fully charged, the management module 100 opens the built-in contactor, and disconnects the charging loop of the lead-acid storage battery pack and the charger, so that the lead-acid storage battery pack enters an open-circuit state.
It should be noted that: when the management module 100 is disconnected from the charging loop of the charger, the diode 300 configured in the management module 100 is used to ensure connectivity between the lead-acid battery pack and the discharging loop of the charger, so that normal discharging of the lead-acid battery pack is not affected, and the diode is added to enhance the safety of the management device, so as to avoid normal discharging of the lead-acid battery pack when the commercial power is cut off or the charger is abnormal in the process of detecting open-circuit voltage. The diode is an electronic device, and can play a function of one-way connectivity.
As shown in table 1 below, a safety comparison table for the management device with and without the diode is shown:
as shown in table 1 above, the levels of the discharge stability in the abnormal state and the unidirectional connectivity in the abnormal state are defined as 1 level, 2 levels, 3 levels, 4 levels and 5 levels from low to high, and the detection shows that the addition of the diode plays an important role in ensuring the security of the management device.
Preferably, the management device in this patent can realize the connection of a plurality of diodes, can carry out the quantity of adding of selection diode according to actual conditions. When it appears that the float voltage of the detected cell reaches the threshold of the normal detection condition (below 3V), it is necessary to equip with 2 diodes to guarantee the normal discharge.
Furthermore, after the management module 100 is disconnected from the charging loop of the charger, the lead-acid storage battery is kept stand at 5-35 ℃ for 24-36 h, and if the lead-acid storage battery discharges due to mains supply power failure in the standing process, the measurement operation is terminated.
It should be noted that: before the battery monitoring module 200 is used for respectively testing and recording the open-circuit voltage of each lead-acid storage battery, the temperature of the lead-acid storage battery pack needs to be defined to be consistent with the ambient temperature, and the open-circuit voltage is basically unchanged. After the open-circuit voltage of each lead-acid storage battery is measured and recorded, the management module 100 closes the built-in contact, and the system returns to the original floating charge mode.
And if the temperature of the lead-acid storage battery cannot meet the requirement of the definition, the measurement operation is terminated.
Furthermore, a bypass module 400 is connected in parallel to the management module 100, and the purpose of the bypass device is to play a role of bypass when the management device is abnormal, so as to ensure the safety of the system.
It should be noted that: in the management module 100, a bypass switch, a contactor and a diode are controlled by a main control unit and are connected into the management module 100 in series, and the main control unit controls the contactor to disconnect a charging loop of a charger and a lead-acid storage battery pack; the diode is used for preventing normal discharge of the lead-acid storage battery pack when commercial power is cut off or the charger is abnormal in the process of detecting open-circuit voltage; by the bypass switch, when the management module 100 is abnormal, the safety of the original system can be ensured.
Table 2: comparison table for lead-acid storage battery float charge voltage and open-circuit voltage tested by the invention
When the voltage of the single storage battery is detected, the lower the detected voltage is, the more the health state of the battery can be reflected, and the data in the table 2 show that the open-circuit voltage monitored on line can better display the health state of the lead-acid storage battery than the float charge voltage collected in the prior art, which clearly shows that the open-circuit voltage of the lead-acid storage battery can be collected on line by the invention.
The open-circuit voltage on-line testing method of the patent can cut off a charging loop of a charger to a lead-acid storage battery pack through a management device under the condition that the normal work of the lead-acid storage battery is not influenced and the battery does not need to discharge, so that the lead-acid storage battery pack enters an open-circuit state, the voltage tested under the open-circuit state is the open-circuit voltage of the lead-acid storage battery pack, the open-circuit voltage of the lead-acid storage battery pack can be really acquired on line, the open-circuit voltage can reflect and judge the health state of the lead-acid storage battery more truly than the floating charge voltage, the daily operation and maintenance work can be better guided, and the safety of the lead-acid storage battery is improved compared with the existing imperfect open-circuit voltage testing method, so that.
Example 2
Referring to fig. 2, a first embodiment of the system for online safely collecting the open-circuit voltage of the lead-acid battery according to the present invention is shown: a system for safely acquiring open-circuit voltage of a lead-acid storage battery on line comprises:
the management module 100 is connected in series with a connecting bus of the lead-acid storage battery pack and the charger and controls disconnection and connection with a charging loop of the charger;
the battery monitoring module 200 is used for testing and recording the open-circuit voltage of each lead-acid storage battery;
a diode 300, configured in the management module 100, for ensuring connectivity between the lead-acid battery pack and a discharge loop of the charger;
the bypass module 400 is connected to the management module 100 in parallel, and is used for playing a role of bypass when the management module 100 is abnormal, so as to ensure the security of the system.
In the management module 100, the bypass switch, the contactor, and the diode are controlled by the main control unit. The main control unit controls the contactor to disconnect the charging loop of the charger and the lead-acid storage battery; the diode is used for preventing normal discharge of the lead-acid storage battery pack when commercial power is cut off or the charger is abnormal in the process of detecting open-circuit voltage; by the bypass switch, when the management module 100 is abnormal, the safety of the original system can be ensured.
Further, the management module 100 includes:
the detection unit is used for detecting the charging current condition of the lead-acid storage battery pack during charging;
and the control unit is used for controlling the disconnection and the connection of the charging loop of the charger.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, the operations of processes described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described herein (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described herein includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein. A computer program can be applied to input data to perform the functions described herein to transform the input data to generate output data that is stored to non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
As used in this application, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being: a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of example, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for safely acquiring open-circuit voltage of a lead-acid storage battery on line is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the management module (100) is connected in series with a connecting bus of a lead-acid storage battery pack and a charger;
defining whether the lead-acid storage battery pack is fully charged, if so, disconnecting a charging loop of the charger from the management module (100);
standing for a period of time at a standard temperature;
respectively testing and recording the open-circuit voltage of each lead-acid storage battery by using a battery monitoring module (200);
after the open-circuit voltage of each lead-acid storage battery is measured and recorded, the management module (100) is connected with a charging loop of the charger.
2. The method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line according to claim 1, characterized by comprising the following steps of: the management module (100) is connected in series with a connecting bus of the lead-acid storage battery pack and the charger,
connecting positive and negative buses of the lead-acid storage battery pack into the management module (100);
and connecting the management module (100) into the charger through a bus.
3. The method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line according to claim 2, characterized by comprising the following steps of: when the charging current of the lead-acid storage battery pack is less than 0.005C or the charging current does not change for 5 continuous hours, the lead-acid storage battery pack is defined to be fully charged, and the management module (100) is disconnected from a charging loop of the charger.
4. The method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line according to claim 2 or 3, wherein the method comprises the following steps: when the management module (100) is disconnected from a charging loop of the charger, the diode (300) is used for ensuring the connectivity of the lead-acid storage battery pack and the discharging loop of the charger, and the normal discharging of the lead-acid storage battery pack is not influenced.
5. The method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line according to claim 4, wherein the method comprises the following steps: and after the management module (100) is disconnected from a charging loop of the charger, standing the lead-acid storage battery for 24-36 h at the temperature of 5-35 ℃.
6. The method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line according to claim 5, wherein the method comprises the following steps: and (3) respectively testing and recording the open-circuit voltage of each lead-acid storage battery by using the battery monitoring module (200), wherein the temperature of the lead-acid storage battery is required to be defined to be consistent with the ambient temperature, and the open-circuit voltage is basically unchanged.
7. The method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line according to claim 6, characterized by comprising the following steps: and when the difference between the temperature of the lead-acid storage battery pack and the ambient temperature is within +/-3 ℃, the temperature and the ambient temperature are defined to be consistent.
8. The method for safely acquiring the open-circuit voltage of the lead-acid storage battery on line according to any one of claims 5 to 7, characterized by comprising the following steps: a bypass module (400) is connected in parallel to the management module (100).
9. The utility model provides a system for on-line safety gathers lead acid battery open circuit voltage which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the management module (100) is connected in series with a connecting bus of the lead-acid storage battery pack and the charger and controls the disconnection and the connection of the lead-acid storage battery pack and a charging loop of the charger;
the battery monitoring module (200) is used for testing and recording the open-circuit voltage of each lead-acid storage battery;
the diode (300) is configured in the management module (100) and used for ensuring the connectivity of the lead-acid storage battery pack and a discharge loop of the charger;
and the bypass module (400) is connected into the management module (100) in parallel and is used for playing a role of bypass when the management module (100) is abnormal, so that the safety of the system is ensured.
10. The system for safely acquiring the open-circuit voltage of the lead-acid storage battery on line according to claim 9, is characterized in that: the management module (100) comprises a memory,
the detection unit is used for detecting the charging current condition of the lead-acid storage battery pack during charging;
and the control unit is used for controlling the disconnection and the connection of the charging loop of the charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305992.4A CN111525636A (en) | 2020-04-17 | 2020-04-17 | Method and system for online safely collecting open-circuit voltage of lead-acid storage battery |
Applications Claiming Priority (1)
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Application publication date: 20200811 |