CN113839453B - Battery control circuit, device and equipment - Google Patents
Battery control circuit, device and equipment Download PDFInfo
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- CN113839453B CN113839453B CN202111417596.1A CN202111417596A CN113839453B CN 113839453 B CN113839453 B CN 113839453B CN 202111417596 A CN202111417596 A CN 202111417596A CN 113839453 B CN113839453 B CN 113839453B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- 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
- 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
- H01M10/443—Methods for charging or discharging in response to temperature
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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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
- H02J7/00309—Overheat or overtemperature protection
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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
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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
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The embodiment of the application provides a battery control circuit, device and equipment, and the circuit includes: the system comprises an alternating current power grid, a rectifier, a direct current bus, K bidirectional DCDCDCDCs, K battery packs and loads, a K battery pack management system and a communication bus, wherein the alternating current power grid is connected with the input end of the rectifier, the output end of the rectifier is connected with the direct current bus, the direct current bus is connected with the first end of each of the K bidirectional DCDs and the first end of the load, the second end of each of the K bidirectional DCDs is connected with the first end of one of the K battery packs, the second end of each of the K battery packs is grounded, and the second end of the load is grounded; k group battery management system and K group battery one-to-one and correspond and be connected, communication bus is connected with every group battery management system in the K group battery management system, every two-way DCDC in the K two-way DCDC, can promote the stability of circuit.
Description
Technical Field
The application relates to the technical field of circuit structures, in particular to a battery control circuit, a battery control device and battery control equipment.
Background
With the continuous development of industries such as electric vehicles, wind power generation, solar power generation, data centers, energy storage power supplies and the like, the application of the lithium battery is more and more extensive. In a traditional power supply system architecture, a bidirectional inversion mode is mostly adopted, and electric energy of a power grid is rectified through a bidirectional inverter.
With the rapid development of industries such as electric vehicles, data centers and the like, a direct current bus energy storage framework is mostly adopted, in the direct current bus energy storage framework, an alternating current power grid forms a direct current bus through a rectifier, a lithium battery interacts with the direct current bus through a bidirectional direct current converter, and a load is connected to the direct current bus.
The biggest problem that the lithium cell exists in the application can not the multiunit parallelly connected, if the lithium cell multiunit is parallelly connected, because the characteristic of every group lithium cell is inconsistent with ageing process, at the charging and the discharge in-process of lithium cell, there will be inhomogeneous phenomenon, lead to connecting the multiunit lithium cell on a generating line can not charge simultaneously or discharge and accomplish, during the extreme condition, when certain a set of has the trouble, because the protection characteristic of lithium cell, the lithium cell on same generating line can not work to make the stability of circuit relatively poor.
Disclosure of Invention
The embodiment of the application provides a battery control circuit, a battery control device and battery control equipment, which can improve the stability of a circuit.
A first aspect of an embodiment of the present application provides a battery control circuit, including: alternating current network, rectifier, direct current bus, K bidirectional DCDCDCDCs, K battery packs and load, wherein,
the alternating current power grid is connected with the input end of the rectifier, the output end of the rectifier is connected with the direct current bus, the direct current bus is connected with the first end of each of the K bidirectional DCDCDCDCDCDCs and the first end of the load, the second end of each of the K bidirectional DCDCDCDCDCDs is connected with the first end of one of the K battery packs, the second end of each of the K battery packs is grounded, and the second end of the load is grounded;
the circuit further comprises K battery pack management systems and a communication bus, wherein the K battery pack management systems correspond to the K battery packs one by one and are correspondingly connected with the K battery packs, the communication bus is connected with each battery pack management system in the K battery pack management systems and each bidirectional DCDC in the K bidirectional DCDCDCDCDCDCDCDCDCDCDC, and the communication bus is used for providing communication links for the K bidirectional DCDCDCDCDCDCDCDCDCDC and the K battery pack management systems;
the battery pack management system is used for detecting the electric quantity of the battery pack corresponding to the battery pack management system and requesting to charge the battery pack corresponding to the battery pack management system when the electric quantity of the battery pack corresponding to the battery pack management system is lower than the preset electric quantity;
if the first battery management system requests the first bi-directional DCDC to charge the battery pack corresponding to the first battery management system, the second battery management system requests the second bi-directional DCDC to charge the battery pack corresponding to the second battery management system, the bidirectional DCDC of the first bidirectional DCDC and the second bidirectional DCDC having the higher charging priority charges the corresponding battery pack, the bidirectional DCDCDCDC of the K bidirectional DCDCDCDCDCDCDCDCDCDCDs other than the bidirectional DCDC of the first bidirectional DCDC and the second bidirectional DCDC having a higher charging priority are in a discharging state, the first bidirectional DCDC and the second bidirectional DCDC are any bidirectional DCDC in the K bidirectional DCDCDCDCDCDCDCDCDCDCDC, the first battery management system is a battery management system corresponding to the first bi-directional DCDC connected battery, the second battery management system is a battery management system corresponding to the battery connected to the second bidirectional DCDC.
With reference to the first aspect, in one possible implementation manner, the circuit further includes a first resistor R1 and a first capacitor C1, where,
a first terminal of the first resistor R1 is connected to the output terminal of the rectifier and a first terminal of the first capacitor C1, a second terminal of the first resistor R1 is connected to a first terminal of each of the K bidirectional DCDCs and a first terminal of the load, and a second terminal of the first capacitor C1 is connected to ground.
With reference to the first aspect, in one possible implementation manner, the circuit further includes a voltage regulation module, a first end of the voltage regulation module is connected to the second end of the first resistor R1, and a second end of the voltage regulation module is connected to the first end of the load.
With reference to the first aspect, in a possible implementation manner, the circuit further includes a temperature detection module, where the temperature detection module is connected to each of the K battery packs, and the temperature detection module is configured to perform temperature detection on each of the K battery packs and send temperature data of each of the K battery packs to a battery pack management system corresponding to each of the K battery packs;
and the battery pack management system corresponding to each battery pack in the K battery packs is used for determining whether to send alarm information according to the temperature information after receiving the temperature information.
With reference to the first aspect, in one possible implementation manner, a voltage value of the dc bus is a preset voltage value, and the preset voltage value is associated with a supply voltage range of the load.
A second aspect of embodiments of the present application provides a battery control apparatus, wherein the apparatus includes a circuit board and the battery control circuit according to any one of the first aspect.
A third aspect of embodiments of the present application provides a battery control apparatus, characterized in that the apparatus includes a housing and the battery control device described in the second aspect.
The embodiment of the application has at least the following beneficial effects:
the battery control circuit includes: the battery pack management system comprises an alternating current power grid, a rectifier, a direct current bus, K bidirectional DCDCDCDCDs, K battery packs and a load, wherein the alternating current power grid is connected with an input end of the rectifier, an output end of the rectifier is connected with the direct current bus, the direct current bus is connected with a first end of each of the K bidirectional DCDCDCDCDs and a first end of the load, a second end of each of the K bidirectional DCDs is connected with a first end of one of the K battery packs, a second end of each of the K battery packs is grounded, a second end of the load is grounded, the circuit further comprises K battery pack management systems and a communication bus, the K battery pack management systems are in one-to-one correspondence and are connected with the K battery packs, and the communication bus is connected with each of the K battery pack management systems, Each of the K bidirectional DCDCs is connected to one another, the communication bus is configured to provide a communication link for the K bidirectional DCDCs and the K battery management systems, each battery management system is configured to perform power detection on a battery corresponding to the battery management system, and request to charge the battery corresponding to the battery management system when the power of the battery corresponding to the battery management system is lower than a preset power, and if a first battery management system requests a first bidirectional DCDC to charge the battery corresponding to the first battery management system and a second battery management system requests a second bidirectional DCDC to charge the battery corresponding to the second battery management system, the battery corresponding to the first bidirectional DCDC and the second bidirectional DCDC having a higher charging priority is charged by the bidirectional DCDC having the first and second bidirectional DCDCs, the battery pack management system comprises a first battery pack management system, a second battery pack management system and a load, wherein the first battery pack management system is a battery pack management system corresponding to a battery pack connected with the first bidirectional DCDC, the second battery pack management system is a battery pack management system corresponding to a battery pack connected with the second bidirectional DCDC, and therefore only one group of batteries are allowed to be in a charging state, the single group of batteries are in a charging state, the rest of batteries are in a discharging state, even if an alternating current power grid is in a power failure, the load cannot have a power failure risk, and therefore stability of the circuit is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a battery control circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another communication bus connection provided in the embodiments of the present application;
FIG. 3 is a schematic diagram of another battery control circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another battery control circuit according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery control circuit according to an embodiment of the present disclosure. As shown in fig. 1, the battery control circuit includes: the system comprises an alternating current power grid 10, a rectifier 20, a direct current bus 30, K bidirectional DCDCDCDCDCDC, K battery packs and a load 40, wherein the K bidirectional DCDC are respectively represented by a bidirectional DCDC1, bidirectional DCDC2, … … and bidirectional DCDCDCK, the K battery packs are respectively represented by a battery pack 1, a battery pack 2, a battery pack … … and a battery pack K,
the alternating current grid 10 is connected with an input end of the rectifier 20, an output end of the rectifier 20 is connected with the direct current bus 30, the direct current bus 30 is connected with a first end of each of the K bidirectional DCDCs and a first end of the load 40, a second end of each of the K bidirectional DCDCs is connected with a first end of one of the K battery packs, a second end of each of the K battery packs is grounded, and a second end of the load 40 is grounded;
the circuit further comprises K battery pack management systems and a communication bus, wherein the K battery pack management systems correspond to the K battery packs one by one and are correspondingly connected with the K battery packs, the communication bus is connected with each battery pack management system in the K battery pack management systems and each bidirectional DCDC in the K bidirectional DCDCDCDCDCDCDCDCDCDCDC, and the communication bus is used for providing communication links for the K bidirectional DCDCDCDCDCDCDCDCDCDC and the K battery pack management systems;
the battery pack management system is used for detecting the electric quantity of the battery pack corresponding to the battery pack management system and requesting to charge the battery pack corresponding to the battery pack management system when the electric quantity of the battery pack corresponding to the battery pack management system is lower than the preset electric quantity;
if the first battery management system requests the first bi-directional DCDC to charge the battery pack corresponding to the first battery management system, the second battery management system requests the second bi-directional DCDC to charge the battery pack corresponding to the second battery management system, the bidirectional DCDC of the first bidirectional DCDC and the second bidirectional DCDC having the higher charging priority charges the corresponding battery pack, the bidirectional DCDCDCDC of the K bidirectional DCDCDCDCDCDCDCDCDCDCDs other than the bidirectional DCDC of the first bidirectional DCDC and the second bidirectional DCDC having a higher charging priority are in a discharging state, the first bidirectional DCDC and the second bidirectional DCDC are any bidirectional DCDC in the K bidirectional DCDCDCDCDCDCDCDCDCDCDC, the first battery management system is a battery management system corresponding to the first bi-directional DCDC connected battery, the second battery management system is a battery management system corresponding to the battery connected to the second bidirectional DCDC.
Wherein, the one-to-one correspondence between the battery pack and the bidirectional DCDC can be understood as: the bidirectional DCDC1 corresponds to the battery pack 1, the bidirectional DCDC2 corresponds to the battery pack 2, and the preset electric quantity is set by an empirical value or historical data.
As shown in fig. 2, fig. 2 provides a schematic diagram of a communication bus to connect to a bi-directional DCDC, battery pack. In fig. 2, a communication bus (CAN) is connected to each battery management system (Bms), each bi-directional DCDC, to provide a communication link for communication therebetween. The battery pack management system comprises K battery packs, which are specifically represented by Bms1, Bms2, … … and BmsK.
In one possible implementation, as shown in fig. 3, the circuit further includes a first resistor R1, a first capacitor C1, wherein,
a first terminal of the first resistor R1 is connected to the output terminal of the rectifier and a first terminal of the first capacitor C1, a second terminal of the first resistor R1 is connected to a first terminal of each of the K bidirectional DCDCs and a first terminal of the load, and a second terminal of the first capacitor C1 is connected to ground. The circuit is filtered through the first resistor R1 and the first capacitor C1, so that the stability of subsequent load current is improved.
In one possible implementation, as shown in fig. 4, the circuit further includes a voltage regulation module 50, a first end of the voltage regulation module 50 is connected to the second end of the first resistor R1, and a second end of the voltage regulation module 50 is connected to the first end of the load.
In a possible implementation manner, the circuit further includes a temperature detection module, where the temperature detection module is connected to each of the K battery packs, and the temperature detection module is configured to perform temperature detection on each of the K battery packs and send temperature data of each of the K battery packs to a battery pack management system corresponding to each of the K battery packs;
and the battery pack management system corresponding to each battery pack in the K battery packs is used for determining whether to send alarm information according to the temperature information after receiving the temperature information.
When the temperature value in the temperature information is higher than a preset temperature value, sending alarm information; and if the temperature value in the temperature information is lower than the preset temperature value, no alarm information is sent. The warning information may be warning information for prompting a higher temperature.
In one possible implementation manner, the voltage value of the dc bus is a preset voltage value, and the preset voltage value is associated with a supply voltage range of the load.
Wherein the preset voltage value is determined by the supply voltage range of the load. The preset voltage value remains unchanged after the battery control circuit is operated.
In one embodiment, a method of battery control may be:
(a) all the batteries Bat1, Bat2, … … and BatK are in a discharge state;
(b) when the battery capacity of the battery pack Bat2 and the battery capacity of the battery pack Bat3 are relatively low at the same time (the battery capacities are lower than the preset capacity value), the corresponding Bms2 and Bms3 simultaneously send the request charging instruction to the corresponding bidirectional DCDC2 and bidirectional DCDC 3;
(c) and setting the priority of the charging sequence as the priority of the low-sequence-number, at the moment, performing priority sequencing on the bidirectional DCDC2 and the bidirectional DCDC3, winning the bidirectional DCDC2, enabling the bidirectional DCDC2 to enter a charging state, and enabling the bidirectional DCDC3 to continuously keep a discharging state and be in a waiting charging state.
(d) When the charging of the bidirectional DCDC2 is completed, the bidirectional DCDC2 is automatically converted into a discharging state, at the moment, the bidirectional DCDC3 detects that no other bidirectional DCDC with high priority on the direct current bus is in the charging state, and the bidirectional DCDC3 is converted from the discharging state into the charging state;
(e) when the bidirectional DCDC3 is in a charging state, whether a bidirectional DCDC with high priority exists on the direct current bus and is in the charging state is detected in real time, and when the bidirectional DCDC with high priority is detected to be in the charging state, for example, when the bidirectional DCDC1 or the bidirectional DCDC2 is in the charging state, the bidirectional DCDC3 stops charging immediately, changes to a discharging state and continues to wait.
(f) Through the mutually exclusive sequential charging control method, only one of all the bidirectional DCDCDCDCDCDs can be ensured to be in a charging state, even if charging conflict occurs, the bidirectional DCDCDCDC directly passes through the communication bus, so that the bidirectional DCDC can be known at the first time, only the DCDC with high priority is allowed to be in the charging state through the priority rule, and the rest bidirectional DCDCDCDCDCDC are forced to be in a discharging state. The control method can effectively prevent a plurality of groups of batteries from being in a charging state, and ensures the reliability of load power supply.
The embodiment of the application provides a battery control device, which is characterized by comprising a circuit board and a battery control circuit in any one of the preceding embodiments.
An embodiment of the present application provides a battery control apparatus, which is characterized in that the apparatus includes a housing and a battery control device as described in the foregoing embodiment.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module.
The integrated units, if implemented in the form of software program modules and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned memory comprises: various media capable of storing program codes, such as a usb disk, a read-only memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and the like.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash memory disks, read-only memory, random access memory, magnetic or optical disks, and the like.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (7)
1. A battery control circuit, the circuit comprising: alternating current network, rectifier, direct current bus, K bidirectional DCDCDCDCs, K battery packs and load, wherein,
the alternating current power grid is connected with the input end of the rectifier, the output end of the rectifier is connected with the direct current bus, the direct current bus is connected with the first end of each of the K bidirectional DCDCDCDCDCDCs and the first end of the load, the second end of each of the K bidirectional DCDCDCDCDCDs is connected with the first end of one of the K battery packs, the second end of each of the K battery packs is grounded, and the second end of the load is grounded;
the circuit further comprises K battery pack management systems and a communication bus, wherein the K battery pack management systems correspond to the K battery packs one by one and are correspondingly connected with the K battery packs, the communication bus is connected with each battery pack management system in the K battery pack management systems and each bidirectional DCDC in the K bidirectional DCDCDCDCDCDCDCDCDCDCDC, and the communication bus is used for providing communication links for the K bidirectional DCDCDCDCDCDCDCDCDCDC and the K battery pack management systems;
the battery pack management system is used for detecting the electric quantity of the battery pack corresponding to the battery pack management system and requesting to charge the battery pack corresponding to the battery pack management system when the electric quantity of the battery pack corresponding to the battery pack management system is lower than the preset electric quantity;
if the first battery management system requests the first bi-directional DCDC to charge the battery pack corresponding to the first battery management system, the second battery management system requests the second bi-directional DCDC to charge the battery pack corresponding to the second battery management system, the bidirectional DCDC of the first bidirectional DCDC and the second bidirectional DCDC having the higher charging priority charges the corresponding battery pack, the bidirectional DCDCDCDC of the K bidirectional DCDCDCDCDCDCDCDCDCDCDs other than the bidirectional DCDC of the first bidirectional DCDC and the second bidirectional DCDC having a higher charging priority are in a discharging state, the first bidirectional DCDC and the second bidirectional DCDC are any bidirectional DCDC in the K bidirectional DCDCDCDCDCDCDCDCDCDCDC, the first battery management system is a battery management system corresponding to the first bi-directional DCDC connected battery, the second battery management system is a battery management system corresponding to the battery connected to the second bidirectional DCDC.
2. The circuit of claim 1, further comprising a first resistor R1, a first capacitor C1, wherein,
a first terminal of the first resistor R1 is connected to the output terminal of the rectifier and a first terminal of the first capacitor C1, a second terminal of the first resistor R1 is connected to a first terminal of each of the K bidirectional DCDCs and a first terminal of the load, and a second terminal of the first capacitor C1 is connected to ground.
3. The circuit of claim 2, further comprising a voltage regulation block, a first terminal of the voltage regulation block being connected to the second terminal of the first resistor R1, a second terminal of the voltage regulation block being connected to the first terminal of the load.
4. The circuit according to any one of claims 1-3, further comprising a temperature detection module connected to each of the K battery packs, the temperature detection module configured to detect a temperature of each of the K battery packs and send temperature data of each of the K battery packs to a battery pack management system corresponding to each of the K battery packs;
and the battery pack management system corresponding to each battery pack in the K battery packs is used for determining whether to send alarm information according to the temperature information after receiving the temperature information.
5. The circuit of claim 4, wherein the voltage value of the DC bus is a preset voltage value, the preset voltage value being associated with a supply voltage range of the load.
6. A battery control device, characterized in that the device comprises a circuit board and a battery control circuit according to any of claims 1-5.
7. A battery control apparatus, characterized in that the apparatus comprises a housing and a battery control device according to claim 6.
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| CN101257136B (en) * | 2007-02-28 | 2011-03-30 | 北京恒基伟业投资发展有限公司 | Photovoltaic battery-small battery charging method |
| CN109842170A (en) * | 2017-11-29 | 2019-06-04 | 上海国际汽车城（集团）有限公司 | A kind of power supply system and its control method using retired battery |
| CN108155707A (en) * | 2018-02-01 | 2018-06-12 | 深圳奥特迅电力设备股份有限公司 | A kind of DC bus powered system and its control method |
| CN111546942A (en) * | 2019-12-19 | 2020-08-18 | 上海煦达新能源科技有限公司 | Low-voltage direct-current charging and discharging source management system of high-voltage power battery in communication base station |
| CN111152685B (en) * | 2020-01-06 | 2021-09-10 | 武汉理工大学 | Droop control method for improving throughput and service life of energy storage battery of micro-grid |
| CN111342676A (en) * | 2020-03-17 | 2020-06-26 | 深圳威迈斯新能源股份有限公司 | DCDC conversion circuit capable of pre-charging |
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