CN114069766A - Battery management method, system and storage medium - Google Patents
Battery management method, system and storage medium Download PDFInfo
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- CN114069766A CN114069766A CN202111192108.1A CN202111192108A CN114069766A CN 114069766 A CN114069766 A CN 114069766A CN 202111192108 A CN202111192108 A CN 202111192108A CN 114069766 A CN114069766 A CN 114069766A
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- 238000007726 management method Methods 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 27
- 230000002159 abnormal effect Effects 0.000 claims description 21
- 238000004590 computer program Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries 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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses a battery management method, a battery management system and a storage medium, which are suitable for a battery module, wherein the battery module comprises a plurality of batteries connected in parallel. The battery management method comprises the following steps: monitoring whether a new battery is connected to the battery module in parallel; when a new battery is connected in parallel to the battery module, detecting the voltage of all batteries in the battery module to determine whether the battery needing to be charged exists; when a battery needing to be charged exists, the battery needing to be charged is connected to a charging circuit for charging. The embodiment of the invention can ensure that the electric quantity of the new battery is basically consistent with that of the original battery in the battery module, simplify the circuit, save the cost and protect the circuit.
Description
Technical Field
The present disclosure relates to the field of battery management systems, and in particular, to a battery management method, a battery management system, and a storage medium.
Background
With the rapid development of modern electronic industry, various electronic products, such as mobile phones, portable notebook computers, new energy vehicles, etc., have been widely used in various fields of daily work and life. As is well known, a power source is a power source for all electronic products, and once the electronic products cannot be driven by enough power, the electronic products cannot be used. In order to meet the power supply requirement of the electronic device, a plurality of single batteries are usually connected in series to obtain a battery or a battery pack, and such a battery can provide a higher voltage for the electronic device. Some electronic devices even require a plurality of such batteries. For electronic devices with high power requirements, a Battery Management System (BMS) is often used to manage the Battery.
When a battery management system is used for managing batteries, when a plurality of batteries are required to be connected in parallel, the original voltage of each battery is not necessarily the same, so that the plurality of batteries cannot be directly connected in parallel, an independent protection circuit is required to be arranged for protecting each battery, and then peripheral DC-DC are arranged in parallel for input and output. Fig. 1 is a schematic diagram of a conventional battery management system. The battery protection circuit comprises n battery branches connected in parallel, a battery is arranged in each battery branch, a battery protection circuit is arranged in each battery, and each battery is connected with one DC-DC converter. The parallel n battery branches are connected in series with another direct current converter DC-DC. The whole circuit is controlled by a Micro Control Unit (MCU). Therefore, the traditional battery circuit is complex in overall structure and high in cost.
Disclosure of Invention
The present application is proposed to solve the above problems. According to an aspect of the present application, there is provided a battery management method applied to a battery module including a plurality of batteries connected in parallel, the battery management method including:
monitoring whether a new battery is connected to the battery module in parallel;
when a new battery is connected in parallel to the battery module, detecting the voltages of an original battery and the new battery in the battery module to determine whether a battery needing to be charged exists;
when a battery needing to be charged exists, the battery needing to be charged is connected to a charging circuit for charging.
In one embodiment of the present application, detecting the voltages of all the batteries in the battery module to determine whether there is a battery requiring charging includes:
comparing the voltage of the new battery with the voltage of the original battery in the battery module;
when the voltage of the primary battery is lower than that of the new battery and the voltage difference between the primary battery and the new battery is greater than a preset voltage difference, determining that the primary battery needs to be charged;
and when the voltage of the new battery is lower than that of the original battery and the voltage difference between the new battery and the original battery is greater than the preset voltage difference, determining that the new battery needs to be charged.
In an embodiment of the present application, after the battery to be charged is connected to a charging circuit for charging, the method further includes:
and when the voltage difference between the battery needing to be charged and the compared battery is smaller than the preset voltage difference, stopping charging.
In an embodiment of the present application, before the battery to be charged is connected to a charging circuit for charging, the method further includes:
and when the battery to be charged is a primary battery, disconnecting the battery to be charged from other batteries in the battery module before charging the battery to be charged.
In an embodiment of the present application, after the battery to be charged is connected to a charging circuit for charging, the method further includes:
and when the voltage difference between the battery to be charged and the compared battery is smaller than the preset voltage difference, connecting the battery to be charged into the battery module, so that the battery to be charged is connected with other batteries in the battery module in parallel.
In an embodiment of the present application, after connecting the battery to be charged to the battery module and connecting the battery to be charged in parallel with other batteries in the battery module, the method further includes:
detecting whether an abnormal battery exists;
and if the abnormal battery exists, disconnecting the abnormal battery from other batteries in the battery module.
In one embodiment of the present application, wherein the battery comprises a single or a plurality of battery cells.
According to another aspect of the present application, there is provided a battery management system including: the charging device comprises a battery module, a switch module, a charging circuit and a controller;
wherein the battery module comprises a plurality of batteries connected in parallel;
the switch module comprises a switch unit arranged on each battery branch and is used for connecting or disconnecting each battery with the charging circuit;
the charging circuit for charging each of the batteries included in the battery module;
the controller is configured to:
monitoring whether a new battery is connected in parallel to the battery module;
when a new battery is connected in parallel to the battery module, detecting the voltages of an original battery and the new battery in the battery module to determine whether a battery needing to be charged exists;
when the battery needing to be charged exists, the switch unit corresponding to the battery needing to be charged in the switch module is controlled to be conducted, so that the battery needing to be charged is connected to the charging circuit to be charged.
In one embodiment of the present application, the controller is further configured to:
comparing the voltage of the new battery with the voltage of the original battery in the battery module;
when the voltage of the primary battery is lower than that of the new battery and the voltage difference between the primary battery and the new battery is greater than a preset voltage difference, determining that the primary battery needs to be charged;
and when the voltage of the new battery is lower than that of the original battery and the voltage difference between the new battery and the original battery is greater than the preset voltage difference, determining that the new battery needs to be charged.
According to yet another aspect of the present application, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, causes the processor to execute the above battery management method.
According to the battery management method, the battery management system and the storage medium, when a new battery is connected into the battery module, whether the battery needing to be charged exists is determined by detecting the voltage of each battery in the battery module, when the battery needing to be charged exists, the battery needing to be charged is connected into the charging circuit for charging, finally, the electric quantity of the new battery is basically consistent with that of the original battery in the battery module, and the circuit can be protected while the circuit is simplified and the cost is saved.
In addition, according to the battery management method, after the new battery is connected, whether the abnormal battery exists in the whole battery module is detected, and when the abnormal battery exists, the abnormal battery is automatically disconnected, so that the damage of the abnormal battery to the whole battery module can be avoided.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 shows a schematic diagram of a battery management system in the prior art;
FIG. 2 shows a schematic flow diagram of a battery management method according to an embodiment of the application;
fig. 3 shows a schematic structural diagram of a battery management system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, exemplary embodiments according to the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the application described in the application without inventive step, shall fall within the scope of protection of the application.
Based on the foregoing technical problem, the present application provides a battery management method, which is applicable to a battery module, where the battery module includes a plurality of batteries connected in parallel, and the battery management method includes: monitoring whether a new battery is connected in parallel to the battery module; when a new battery is connected in parallel to the battery module, detecting the voltage of all batteries in the battery module to determine whether the battery needing to be charged exists; when the battery needing to be charged exists, the battery needing to be charged is connected into the charging circuit for charging. According to the battery management method, the battery is detected through the newly-accessed battery, whether the battery needing to be charged exists is determined, when the battery needing to be charged exists, the battery needing to be charged is accessed into the charging circuit to be charged, the electric quantity of the new battery and the electric quantity of the primary battery in the battery module can be basically consistent, the circuit is simplified, the cost is saved, and meanwhile, the circuit is protected.
The following describes in detail a scheme of a battery management method according to an embodiment of the present application with reference to the drawings. The features of the various embodiments of the present application may be combined with each other without conflict.
FIG. 2 shows a schematic flow diagram of a battery management method according to an embodiment of the application; the battery management method is applicable to a battery module, and the battery module comprises a plurality of batteries connected in parallel. As shown in fig. 2, a battery management method 200 according to an embodiment of the present application may include the following steps S201, S202, and S203:
in step S201, it is monitored whether a new battery is connected in parallel to the battery module.
In one example, the battery includes a single battery cell. The battery may be constructed of a single battery cell. When the user's electric equipment needs a small voltage, only one battery unit is needed to constitute the battery.
In one example, a battery includes a plurality of battery cells. And the plurality of battery cells are connected in series. It should be appreciated by those skilled in the art that when a voltage of one battery cell is small, a plurality of battery cells need to be connected in series to obtain a larger voltage when a larger voltage is required by a user's electric device.
In one embodiment of the invention, whether a new battery is connected to the battery module may be monitored by a controller in the battery management circuit. However, in this case, in order to secure the circuit safety, the new battery is not directly connected to the entire circuit, and a switch unit may be provided in a branch of the new battery, and when the new battery is connected, the switch unit may be kept in an off state to disconnect the new battery from the other batteries in the entire battery module. And after the voltage of the new battery is basically equal to that of the original battery in the battery module, the new battery circuit is conducted with the whole battery circuit.
The original battery of the battery module or the original parallel circuit formed by each battery is referred to as the original primary battery. For example, a battery module includes two batteries, and then a battery is newly added, and the battery module includes two batteries or a parallel circuit of two batteries with respect to the newly added battery, and the parallel circuit of two batteries is called a primary battery. Accordingly, the newly added battery is referred to as a new battery. For convenience of description, the original parallel circuit formed by the batteries is referred to as a primary battery.
In step S202, when a new battery is connected to the battery module in parallel, the voltages of the original battery and the new battery in the battery module are detected to determine whether there is a battery to be charged.
In one example, a method of determining whether there is a battery that needs to be charged includes the steps of: comparing the voltages of the new battery and the original battery in the battery module; b, when the voltage of the primary battery is lower than that of the new battery and the voltage difference between the primary battery and the new battery is greater than a preset voltage difference, determining that the primary battery needs to be charged; and C, when the voltage of the new battery is lower than that of the original battery and the voltage difference between the new battery and the original battery is greater than the preset voltage difference, determining that the new battery needs to be charged.
Since the original voltage of each battery is not necessarily uniform, the batteries having non-uniform voltage cannot be directly connected in parallel. It is therefore desirable to regulate the voltage of the battery to as substantially a uniform voltage as possible. In the embodiment of the invention, the method for charging the low-voltage batteries is adopted, so that the voltages of all the batteries are basically consistent or have small phase difference, and the aim of protecting the circuit is fulfilled. In other words, the voltages between the new battery and the primary batteries in the battery module may be compared, and then which voltage is low, which voltage is charged. This allows the cell voltages in the battery modules to remain substantially uniform.
Since the primary cells are connected in parallel, the voltage of the primary cell is substantially the same as the voltage of each cell in the parallel circuit, so that the primary cell can be compared with a new cell, and if the primary cell is lower, it means that each cell in the primary cell circuit is lower, and each cell in the primary cell circuit needs to be charged.
In one particular example, the voltage differential across the lithium battery is between about 100mV and about 200 mV. The user may set the voltage difference to 200mV in advance. And comparing the voltages of the new battery and the original battery, and if the voltage of the new battery is greater than that of the original battery and the voltage difference between the new battery and the original battery exceeds 200m V, charging the original battery so that the voltage difference between the original battery and the new battery does not exceed 200 mV.
In another specific example, the battery module is composed of a plurality of primary batteries, and when a new battery is connected, the new battery and the primary batteries can be compared one by one, then the battery with lower voltage is charged, and finally the voltage of the new battery is basically consistent with that of the primary batteries.
In step S203, when there is a battery to be charged, the battery to be charged is connected to the charging circuit for charging.
In one example, before the battery to be charged is connected to the charging circuit for charging, the method further comprises: when the battery needing to be charged is a primary battery, the battery needing to be charged is disconnected with other batteries in the battery module before the battery needing to be charged is charged.
In one example, after the battery to be charged is connected to the charging circuit for charging, the method further comprises: and when the voltage difference between the battery needing to be charged and the compared battery is smaller than the preset voltage difference, stopping charging.
Here, when the new battery and the primary battery are compared, both batteries are not charged when the voltage difference therebetween is equal to or less than a preset voltage. However, when the voltage difference between the two batteries is greater than the preset voltage, the battery with the lower voltage of the two batteries will need to be charged, and for convenience of description, the battery with the lower voltage is referred to as a battery to be charged, and the battery with the higher voltage of the two batteries is referred to as a compared battery.
In one example, after the battery to be charged is connected to the charging circuit for charging, the method further comprises: when the voltage difference between the battery needing to be charged and the compared battery is smaller than the preset voltage difference, the battery needing to be charged is connected into the battery module, and the battery needing to be charged is connected with other batteries in the battery module in parallel.
In other embodiments of the present invention, after the battery to be charged is connected to the battery module and the battery to be charged is connected in parallel with other batteries in the battery module, it may be detected whether an abnormal battery exists in the entire battery module. Specifically, whether there is a battery with abnormality is detected; if the abnormal battery exists, the abnormal battery is disconnected so as to prevent the abnormal battery from damaging the whole battery module. Common abnormal situations include: battery aging, battery outage, excessive battery leakage current, inability of a battery to fully charge, etc.
In another embodiment, when an abnormal battery is found after the whole battery module is detected, a notification may be sent to the user to prompt the user that the abnormal battery exists, so that the user can find the fault as soon as possible and perform maintenance to avoid greater loss.
The battery management system of the present application is described below with reference to fig. 3, where fig. 3 shows a block diagram of the structure of the battery management system according to the embodiment of the present application.
As shown in fig. 3, a battery management system 300 according to an embodiment of the present invention includes a battery module 301, a switch module 302, a charging circuit 303, and a controller 304. The various modules may each perform the various steps/functions of the battery management method described above in connection with fig. 2. Only the main functions of the units of the battery management system 300 are described below, and the details that have been described above are omitted.
A battery module 301 including a plurality of batteries connected in parallel;
a switch module 302 including a switch unit provided to each battery branch for connecting or disconnecting each battery to or from the charging circuit;
a charging circuit 303 for charging each battery included in the battery module.
In an embodiment of the present invention, the controller 304 is configured to: monitoring whether a new battery is connected in parallel to the battery module; when a new battery is connected in parallel to the battery module, detecting the voltage of all batteries in the battery module to determine whether the battery needing to be charged exists; when the battery needing to be charged exists, the switch unit corresponding to the battery needing to be charged in the switch module is controlled to be conducted, so that the battery needing to be charged is connected to the charging circuit for charging.
In one example, the battery may include a lithium battery, a lead-acid battery, a nickel-hydrogen rechargeable battery, or the like. The battery management method provided by the embodiment of the invention can be suitable for different battery types. Accordingly, the battery management system of the embodiment of the invention can also be applied to various electronic devices.
In one example, the switching unit includes a mechanical switch or a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) electronic switch. In each battery branch, a switching unit is connected in series with the battery. So that the switching unit can control the battery to be connected with or disconnected from the charging circuit. The cells may also be controlled to be on or off from the battery module 301.
In one example, an external power source or other reserve power source or the like may be connected through the charging circuit 303 to charge a battery that needs to be charged.
In one example, the controller 304 may comprise a micro-control unit, or other suitable type of controller.
It should be noted that, in the embodiment of the present invention, the controller 304 may detect the voltage of each battery and control each battery to charge and stop charging. In other embodiments of the present invention, a detection circuit independent from the controller 304 may be further provided to detect the voltage of each battery, and the controller 304 may acquire the voltage of each battery detected by the detection circuit.
In one embodiment, the controller 304 is further configured to:
comparing the voltages of the new battery and the original battery in the battery module;
when the voltage of the primary battery is lower than that of the new battery and the voltage difference between the primary battery and the new battery is greater than a preset voltage difference, determining that the primary battery needs to be charged;
and when the voltage of the new battery is lower than that of the original battery and the voltage difference between the new battery and the original battery is greater than the preset voltage difference, determining that the new battery needs to be charged.
In one embodiment, the controller 304 is further configured to:
and when the voltage difference between the battery needing to be charged and the compared battery is smaller than the preset voltage difference, stopping charging.
In one embodiment, the controller 304 is further configured to:
and when the battery to be charged is a primary battery, disconnecting the battery to be charged from other batteries in the battery module before charging the battery to be charged.
In one embodiment, the controller 304 is further configured to:
and when the voltage difference between the battery to be charged and the compared battery is smaller than the preset voltage difference, connecting the battery to be charged into the battery module, so that the battery to be charged is connected with other batteries in the battery module in parallel.
In one embodiment, the controller 304 is further configured to:
connecting the battery to be charged into the battery module, and detecting whether an abnormal battery exists after the battery to be charged is connected with other batteries in the battery module in parallel;
and if the abnormal battery exists, disconnecting the abnormal battery from other batteries in the battery module.
In a specific example, continuing with fig. 3, in a circuit management system 300, a battery module 301 is included, wherein the battery module includes a primary battery and 1 new battery, and the primary battery is composed of (n-1) batteries (see batteries 1 to (n-1) in the figure), and the new battery is battery n. The battery module 301 is connected to the switch module 302, and each switch unit in the switch module is connected to one battery respectively to control the on/off of the battery. Meanwhile, the battery module 301 is connected to the charging circuit 303 through the switching unit, and to the controller 304. So that the battery is controlled by the controller 304 to be connected with the charging circuit 303 for charging or stopping charging, and the battery is controlled by the controller 304 to be connected in parallel to the battery module 301.
When a new cell n is connected in parallel to the battery module 301, the voltage of the new cell n is compared with the voltage of the original cell by the controller 304. For example, if the voltage of the new cell n is higher than that of the original cell and the voltage difference between the two is greater than 200mV, the controller 304 controls the switching units 1 to (n-1) to disconnect each of the original cells from the other cells in the battery module 301 and connect the original cells to the charging circuit 303 for charging. The voltage difference between the original battery and the new battery does not exceed the preset voltage difference. To avoid circuit damage due to battery voltage imbalance.
In one embodiment of the present invention, the switch unit may be a switch having a multiplexing function, which can control both a circuit composed of a battery and the charging circuit 303 and a circuit composed of a plurality of batteries connected in parallel. When a battery needs to be charged or when the battery is abnormal, the controller 304 controls the switch unit to disconnect a loop formed by connecting the battery needing to be charged and a plurality of batteries in parallel. At the same time, the switch unit is controlled to conduct the circuit formed by the battery to be charged and the charging circuit 303 for charging. When the battery is disconnected from other batteries, the operation of other batteries in the battery module is not affected.
Accordingly, when the charging of the battery to be charged is completed, the controller 304 controls the switching unit to disconnect the battery to be charged from the circuit formed by the charging circuit 303 and to turn on the circuit formed by connecting the battery to be charged in parallel with the plurality of batteries. Thereby completing access to the new battery.
In another embodiment of the present invention, the switching unit may include at least two switches. One of the switches controls a circuit composed of a battery and a charging circuit 303, and the other switch controls a circuit composed of a plurality of batteries connected in parallel. When a battery needs to be charged, the controller 304 controls the other switch to be turned off, so that a loop formed by connecting the battery needing to be charged and a plurality of batteries in parallel is disconnected. And simultaneously, one switch is controlled to conduct a loop formed by the battery to be charged and the charging circuit 303 so as to charge. And when the battery needing to be charged is charged, the operation of other batteries in the battery module is not influenced.
Accordingly, when the charging of the battery to be charged is completed, the controller 304 controls one of the switches to be turned off, so that the circuit formed by the battery to be charged and the charging circuit 303 is disconnected, and the charging is stopped. And meanwhile, the other switch is controlled to be conducted, so that a loop formed by connecting the battery to be charged and the plurality of batteries in parallel is conducted. Thereby completing access to the new battery.
Furthermore, according to an embodiment of the present application, there is also provided a storage medium on which program instructions are stored, and the program instructions are used for executing corresponding steps of the battery management method of the embodiment of the present application when the program instructions are executed by a computer or a processor. The storage medium may include, for example, a memory card of a smart phone, a storage component of a tablet computer, a hard disk of a personal computer, a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a portable compact disc read only memory (CD-ROM), a USB memory, or any combination of the above storage media.
In one example, the computer or processor includes a controller, such as a micro-control unit.
The battery management system and the storage medium according to the embodiments of the present application have the same advantages as the foregoing battery management method since the foregoing battery management method can be implemented.
Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another device, or some features may be omitted, or not executed.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the description of exemplary embodiments of the present application, various features of the present application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the application and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present application should not be construed to reflect the intent: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the present application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a micro-control unit or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some of the modules according to embodiments of the present application. The present application may also be embodied as apparatus programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present application may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
The above description is only for the specific embodiments of the present application or the description thereof, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope disclosed in the present application, and shall be covered by the protection scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A battery management method applied to a battery module including a plurality of batteries connected in parallel, the battery management method comprising:
monitoring whether a new battery is connected to the battery module in parallel;
when a new battery is connected in parallel to the battery module, detecting the voltages of an original battery and the new battery in the battery module to determine whether a battery needing to be charged exists;
when a battery needing to be charged exists, the battery needing to be charged is connected to a charging circuit for charging.
2. The method of claim 1, wherein when a new battery is connected in parallel to the battery module, detecting voltages of a primary battery and the new battery in the battery module to determine whether a battery needing charging exists comprises:
comparing the voltage of the new battery with the voltage of the original battery in the battery module;
when the voltage of the primary battery is lower than that of the new battery and the voltage difference between the primary battery and the new battery is greater than a preset voltage difference, determining that the primary battery needs to be charged;
and when the voltage of the new battery is lower than that of the original battery and the voltage difference between the new battery and the original battery is greater than the preset voltage difference, determining that the new battery needs to be charged.
3. The method of claim 2, wherein after the battery to be charged is connected to a charging circuit for charging, the method further comprises:
and when the voltage difference between the battery needing to be charged and the compared battery is smaller than the preset voltage difference, stopping charging.
4. The method of claim 3, wherein before the battery to be charged is connected to a charging circuit for charging, the method further comprises:
and when the battery to be charged is a primary battery, disconnecting the battery to be charged from other batteries in the battery module before charging the battery to be charged.
5. The method of claim 3, wherein after the battery to be charged is connected to a charging circuit for charging, the method further comprises:
and when the voltage difference between the battery to be charged and the compared battery is smaller than the preset voltage difference, connecting the battery to be charged into the battery module, so that the battery to be charged is connected with other batteries in the battery module in parallel.
6. The method of claim 5, wherein after connecting the battery to be charged to the battery module and connecting the battery to be charged in parallel with other batteries in the battery module, the method further comprises:
detecting whether an abnormal battery exists;
and if the abnormal battery exists, disconnecting the abnormal battery from other batteries in the battery module.
7. The method of claim 1, wherein the battery comprises a single or a plurality of battery cells.
8. A battery management system, characterized in that the battery management system comprises: the charging device comprises a battery module, a switch module, a charging circuit and a controller;
wherein the battery module comprises a plurality of batteries connected in parallel;
the switch module comprises a switch unit arranged on each battery branch and is used for connecting or disconnecting each battery with the charging circuit;
the charging circuit for charging each of the batteries included in the battery module;
the controller is configured to:
monitoring whether a new battery is connected in parallel to the battery module;
when a new battery is connected in parallel to the battery module, detecting the voltages of an original battery and the new battery in the battery module to determine whether a battery needing to be charged exists;
when the battery needing to be charged exists, the switch unit corresponding to the battery needing to be charged in the switch module is controlled to be conducted, so that the battery needing to be charged is connected to the charging circuit to be charged.
9. The battery management system of claim 8, wherein the controller is further configured to:
comparing the voltage of the new battery with the voltage of the original battery in the battery module;
when the voltage of the primary battery is lower than that of the new battery and the voltage difference between the primary battery and the new battery is greater than a preset voltage difference, determining that the primary battery needs to be charged;
and when the voltage of the new battery is lower than that of the original battery and the voltage difference between the new battery and the original battery is greater than the preset voltage difference, determining that the new battery needs to be charged.
10. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method according to any one of claims 1 to 7.
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| CN202111192108.1A CN114069766A (en) | 2021-10-13 | 2021-10-13 | Battery management method, system and storage medium |
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| CN202111192108.1A CN114069766A (en) | 2021-10-13 | 2021-10-13 | Battery management method, system and storage medium |
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