CN116667482A - Battery device and power supply system using DC input - Google Patents

Battery device and power supply system using DC input Download PDF

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Publication number
CN116667482A
CN116667482A CN202310528345.3A CN202310528345A CN116667482A CN 116667482 A CN116667482 A CN 116667482A CN 202310528345 A CN202310528345 A CN 202310528345A CN 116667482 A CN116667482 A CN 116667482A
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CN
China
Prior art keywords
battery
switch module
direct current
module
current input
Prior art date
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Pending
Application number
CN202310528345.3A
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Chinese (zh)
Inventor
张永照
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Anhui Mingde Yuanneng Technology Co ltd
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Anhui Mingde Yuanneng Technology Co ltd
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Publication date
Application filed by Anhui Mingde Yuanneng Technology Co ltd filed Critical Anhui Mingde Yuanneng Technology Co ltd
Priority to CN202310528345.3A priority Critical patent/CN116667482A/en
Publication of CN116667482A publication Critical patent/CN116667482A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • 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 application relates to energy storage technology, and discloses a battery device and a power supply system adopting direct current input, wherein the battery device comprises a direct current input end, a monitoring management unit, a first switch module, a second switch module and a battery core module, the first switch module and the second switch module are connected in series between the direct current input end and a load, and the input end and the output end of the battery core module are respectively and electrically connected with the direct current input end and the load through the first switch module and the second switch module; the monitoring management unit is used for monitoring and controlling the battery device, is responsible for management work of the battery device, is responsible for communication with the background management system, reports the running information of the system, and executes the remote control instruction of the background management system. The application aims to provide a battery device which is convenient for distributed arrangement and is used for uninterrupted power supply for a load under the direct current input condition, so that the running stability of the load is ensured, the current flow direction is controllable, and a terminal uninterrupted power supply solution is provided under the direct current input condition, so that the battery can be charged and discharged under the control and can work independently.

Description

Battery device and power supply system using DC input
Technical Field
The application relates to the technical field of energy storage, in particular to a battery device and a power supply system adopting direct current input.
Background
The data center not only needs a large amount of power to maintain the operation of the server, the storage device, the backup device, the cooling system and other devices, but also needs to be equipped with a corresponding storage battery for the power supply system of the data center in order to prevent the data center from being lost or damaging related devices due to sudden interruption of the supply of the power supply to the data center, so that the load of the data center can be supplied with power through the storage battery when the power is off from the outside, and the normal operation of the data center is maintained.
In order to meet the huge power supply requirement of the data center, a large-scale storage battery pack is often required to be equipped for the data center, and the storage battery pack equipped for the data center is generally placed and managed in a centralized mode at present, so that potential safety hazards that the storage battery is easier to fire at high temperature due to the fact that the storage battery is too centralized exist, and once the storage battery fires, all the storage batteries can be burnt out (even the whole power supply system is damaged), and the load of the data center cannot be maintained. And along with the increase of the power of the data center server, the space occupied by the centralized storage battery pack is larger and larger, and the setting space of the data center main equipment is seriously decompressed.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present application and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The application mainly aims to provide a battery device and a power supply system adopting direct current input, and aims to provide a battery device which is convenient for distributed arrangement and is used for uninterrupted power supply for a load under the direct current input condition so as to ensure the stability of load operation, realize the controllability of current flow and ensure the safety of power supply.
In order to achieve the above object, the present application provides a battery device adopting direct current input, the battery device includes a direct current input end, a monitoring management unit, a first switch module, a second switch module and a battery core module, wherein the first switch module and the second switch module are sequentially connected in series between the direct current input end and a load, the battery core module includes a storage battery, a first voltage transformation unit and a third switch module, the input end of the first voltage transformation unit is electrically connected with the direct current input end through the first switch module, the charge and discharge end of the storage battery is electrically connected with the output end of the first voltage transformation unit and the first conduction end of the third switch module, and the second conduction end of the third switch module is electrically connected with the load through the second switch module;
The monitoring management unit is used for monitoring and controlling the battery device, is responsible for management work of the battery device, and controls the first switch module to form a passage between the direct current input end and the load when the direct current input end supplies power normally, so that current input by the direct current input end flows to the load and/or the storage battery is charged through the first voltage transformation unit; when the power supply of the direct current input end is abnormal, the output current of the storage battery flows to the load through the third switch module and the second switch module in sequence, so that the battery core module discharges to the load; and controlling the battery core module to stop discharging through the third switch module when the load is abnormal or the storage capacity of the storage battery is smaller than a preset threshold value.
In order to achieve the above object, the present application further provides a power supply system, which includes a dc source and a plurality of battery devices, wherein the battery devices are the battery devices using dc input; the direct current input end of each battery device is electrically connected with the direct current output end of the direct current source.
The battery device and the power supply system adopting direct current input are provided, the battery device which can independently operate and is distributed between the power supply system and the load of the data center is provided, potential safety hazards caused by centralized arrangement of the battery device in the power supply system are reduced, occupied area is reduced, the stability of the power supply system for supplying power to the load is guaranteed, the battery device can operate in a low-circuit-loss mode except for charging when the power supply system can normally supply power to the load, a storage battery in the battery device can be started for supplying power to the load when the power supply system cannot normally supply power to the load, and therefore whether the power supply of the direct current input end is normal or not can be realized, uninterrupted power supply can be realized, and accordingly continuous and stable operation of the load is guaranteed, namely the stability of the operation of the load is guaranteed.
Drawings
Fig. 1 is a diagram showing an exemplary structure of a battery device employing dc input according to an embodiment of the present application;
fig. 2 is a diagram showing another example of the structure of a battery device employing dc input according to an embodiment of the present application;
FIG. 3 is a diagram showing a third switch module in a battery device using DC input according to an embodiment of the present application;
fig. 4 is a diagram showing another exemplary structure of a third switch module in a battery device using dc input according to an embodiment of the present application;
fig. 5 is a diagram showing an example of the structure of a battery device employing dc input according to another embodiment of the present application;
fig. 6 is a diagram showing another example of the structure of a battery core module in a battery device using dc input according to an embodiment of the present application;
fig. 7 is a diagram showing a structural example of a first switch module in a battery device using dc input according to an embodiment of the present application;
fig. 8 is a diagram showing an example of the structure of a battery device employing dc input according to another embodiment of the present application;
fig. 9 is a diagram illustrating a structure of a power supply system according to an embodiment of the application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present application and should not be construed as limiting the application, and all other embodiments, based on the embodiments of the present application, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present application.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only (e.g., to distinguish between identical or similar elements) and is not to be construed as indicating or implying a relative importance or an implicit indication of the number of features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
Referring to fig. 1, in an embodiment, the present application provides a battery device adopting dc input, where the battery device includes a dc input end, a monitoring management unit, a first switch module, a second switch module, and a battery core module, where the first switch module and the second switch module are sequentially connected in series between the dc input end and a load, the battery core module includes a storage battery, a first voltage transformation unit, and a third switch module, an input end of the first voltage transformation unit is electrically connected to the dc input end through the first switch module, a charge-discharge end of the storage battery is electrically connected to an output end of the first voltage transformation unit, a first conduction end of the third switch module, and a second conduction end of the third switch module is electrically connected to the load through the second switch module;
The monitoring management unit is used for monitoring and controlling the battery device, is responsible for management work of the battery device, and controls the first switch module to form a passage between the direct current input end and the load when the direct current input end supplies power normally, so that current input by the direct current input end flows to the load and/or the storage battery is charged through the first voltage transformation unit; when the power supply of the direct current input end is abnormal, the output current of the storage battery flows to the load through the third switch module and the second switch module in sequence, so that the battery core module discharges to the load; and controlling the battery core module to stop discharging through the third switch module when the load is abnormal or the storage capacity of the storage battery is smaller than a preset threshold value.
Optionally, the dc input end may be electrically connected to a dc output end of the power supply system, and may be connected to a dc output by the power supply system; the power supply system may include a plurality of dc outputs, each of which may be electrically connected to at least one of the battery devices, and the connection of the battery devices into the power supply system may be accomplished by electrically connecting the dc input of each of the battery devices to the dc output of the power supply system.
The power supply system can be a power supply system of the data center, and is used for converting the accessed alternating current commercial power into direct current suitable for loads of the data center and outputting the direct current through a direct current output end.
Optionally, the monitoring management unit may be a control system of the battery device, or a device of a single-chip microcomputer with a control function, and when the power supply of the dc input end is normal (for example, the dc output of the power supply system has a current output), the monitoring management unit may take power from the dc input end; when the power supply of the direct current input end is abnormal, the monitoring management unit can take power from the output end of the third switch module.
The monitoring management unit is used for monitoring and controlling the battery device, is responsible for management work of the battery device, is responsible for communication with a background management system, reports running information of the system, and executes a remote control instruction of the background management system.
Optionally, the monitoring management unit includes a plurality of control signal output terminals, configured to electrically connect control terminals of controllable devices (such as the first switch module) in the battery device, and output corresponding control signals to the controllable devices, so as to control the controllable devices; the monitoring management unit is further configured with at least one monitoring terminal, through which the current, voltage or other state in the system of any circuit (including the battery core module) in the battery device can be detected (refer to fig. 1, for example, the monitoring terminal is connected to the line between the dc input terminal and the first switch module, so that the current between the dc input terminal and the first switch module can be monitored, and if the monitoring terminal is connected to the charge/discharge terminal of the battery, the input/output voltage and current of the battery can be monitored).
Optionally, the first switch module may be provided with a controllable unidirectional conduction switch device (such as a MOS transistor), or may be provided with an uncontrollable unidirectional conduction switch device (such as a diode), where a current conduction direction of the unidirectional conduction switch device in the first switch module is a first conduction end of the first switch module to a second conduction end of the first switch module. If the first switch module is provided with a controllable unidirectional conduction switch device, the control signal output end of the monitoring management unit is electrically connected with the control end of the first switch module (as shown in fig. 1). In addition, if necessary, the first switch module may further include circuit protection devices such as a circuit breaker and a lightning protection device, so as to protect the system circuit at critical time.
Alternatively, the semiconductor device (such as a MOS transistor or a diode) in the first switching module may be connected in parallel to a relay or a contactor device to reduce the working loss, but the device should be cut off immediately when abnormal, and when the parallel relay or contactor device is not provided, if only the MOS transistor is used, the MOS transistor should cut off the path for the first time, and only the body diode or the unidirectional diode connected in parallel to increase the current-carrying capacity is kept on to the load side.
Optionally, the second switch module may be used as a circuit protection device, and may have a corresponding detection and measurement function (for example, detecting whether a battery device is connected to one side of the load), and through communication connection with the monitoring management unit, report the corresponding detection and measurement to the monitoring management unit. The second switch module may be an output power distribution unit (e.g., a power distribution cabinet, a small bus, etc.) to distribute the output power of the battery device to the load. The operation information of the second switch module may also be directly detected by the monitoring management unit.
However, in some alternative embodiments, when the second switch module adopts a controllable device, the control signal output end of the monitoring management unit may be electrically connected to the control end of the second switch module, so as to control the second switch module to be turned on or turned off by controlling whether the power distribution unit in the second switch module is operated.
When the second switch module is closed, a passage can be formed between the first conducting end and the second conducting end of the second switch module; when the second switch module is disconnected, an open circuit is formed between the first conducting end and the second conducting end of the second switch module.
Optionally, the first conducting end of the first switch module is electrically connected with the dc input end, and the second conducting end of the first switch module is electrically connected with the first conducting end of the second switch module, and the second conducting end of the second switch module is electrically connected with the load, so that when the monitoring management unit controls the first switch module and the second switch module to form a channel, the channel can be formed between the dc input end and the load, and the dc input end can directly supply power to the load; on the contrary, if any one of the first switch module and the second switch module is disconnected, the direct current input end and the load are disconnected, and at this time, the direct current input end cannot directly supply power to the load.
If the direct current input end is connected with the direct current output end of the power supply system of the data center, the load electrically connected with the battery device can be the load of the data center; and the battery device can be electrically connected with one load or multiple loads.
Optionally, the input end of the battery core module is electrically connected to the second conducting end of the first switch module, and the output end of the battery core module is electrically connected to the first conducting end of the second switch module.
Optionally, the battery core module includes a storage battery, a first voltage transformation unit and a third switch module, where a charge-discharge end of the storage battery is electrically connected to an output end of the first voltage transformation unit and a first conduction end of the third switch module, an input end of the first voltage transformation unit is an input end of the battery core module, and a second conduction end of the third switch module is an output end of the battery core module; when the battery core module is charged, the current input by the battery core module charges the storage battery through the first transformation unit; when the battery core module discharges, the storage battery enables the battery core module to output current through the third switch module.
Optionally, the first voltage transformation unit is a unidirectional voltage transformation unit, and the current flow direction of the unidirectional voltage transformation unit is from the input end to the output end of the first voltage transformation unit. The output end of the first voltage transformation unit is electrically connected with the charge and discharge end of the storage battery, and the input end of the first voltage transformation unit is electrically connected with the second conduction end of the first switch module. Optionally, the first transforming unit may be a DC/DC (direct current to direct current) voltage power converting unit, and the first transforming unit may be configured to convert the received direct current voltage into a direct current voltage adapted to the storage battery (e.g. into a rated voltage of the storage battery), and then output the converted voltage to the storage battery.
Optionally, the first voltage transformation unit may convert the received dc voltage into a dc voltage adapted to the storage battery according to a preset working parameter; or, the control end of the first voltage transformation unit is electrically connected with the control signal output end (as shown in fig. 1) of the monitoring management unit and is controlled by the monitoring management unit, so that the monitoring management unit can set the working parameters of the first voltage transformation unit by outputting corresponding control signals to the first voltage transformation unit, and the first voltage transformation unit can charge the storage battery according to the charging requirement of the storage battery.
Optionally, a first switching device is disposed in the third switching module; or, the third switch module is provided with a first switch device and a second switch device in parallel; or, the third switch module is provided with a first switch device and a second switch device in series;
the first switching device is a unidirectional conduction device, and the conduction direction is the direction from the storage battery to the load; the second switching device is a non-unidirectional conducting device; if the second switching device is connected with the first switching device in series, the second switching device is a normally open switching device; and if the second switching device is connected with the first switching device in parallel, the second switching device is in an off state when the storage battery is in a non-discharging state.
Optionally, the first switching device may be a controllable unidirectional conduction switching device (such as a MOS transistor), or an uncontrollable unidirectional conduction switching device (such as a diode), where a current conduction direction of the unidirectional conduction switching device is a conduction direction from the storage battery to the load.
Optionally, the first conducting end of the third switch module is electrically connected to the charge and discharge end of the storage battery, and the second conducting end of the third switch module is electrically connected to the first conducting end of the second switch module.
Optionally, when the monitoring management unit monitors that the power supply of the dc input end is normal, the first switch module is controlled to form a path between the dc input end and the load, so that the current input by the dc input end flows to the load through the first switch module and the second switch module in sequence. At this time, the second switching device in the third switching module is turned off or the first switching device is naturally turned off in one direction, so that no current is output from the output end of the battery core module, that is, the storage battery in the battery core module does not need to supply power to the load.
Of course, if the monitoring management unit monitors that the storage battery in the battery core module is not fully charged at this time, the current at the direct current input end can be controlled to flow to the first transformation unit through the first switch module, and after the voltage transformation is performed by the first transformation unit, the storage battery in the battery core module is charged (so that the storage battery can be charged by using the first transformation unit).
In addition, if the load has no power supply requirement, the load can also send a corresponding control signal to the monitoring management unit to actively disconnect the second switch module (even if the second switch module is in an off state) so as to prevent the direct current input end from charging the battery through the second switch module.
Optionally, in a general case, if the second switch module is a controlled switch, the monitoring management unit may control the second switch module to maintain a normally closed state, and if the monitoring management unit detects that the load is abnormal through the second switch module, then control the second switch module to be turned off, so as to avoid damaging the battery device by the fault load.
Alternatively, the second switch module may be a protection device such as a circuit breaker, a fuse, etc., and the action of the second switch module is not controlled by the monitoring unit.
Optionally, when the power supply of the direct current input end is abnormal (voltage loss or power loss), the third switch module is naturally conducted (because the second switch device connected in series is in a closed state, the first switch device is in a unidirectional conduction state from the storage battery to the load), so that uninterrupted power supply from the battery to the load is realized; when the monitoring management unit monitors the battery discharge information, the monitoring unit controls the second switching device to be closed when the second switching device connected in parallel with the first switching device exists, and a low-impedance path is formed to supply power to the load.
Optionally, if the load abnormality is detected in the process of controlling the discharging of the battery core module by the monitoring management unit, the discharging of the battery core module can be controlled by the third switch module, so as to avoid unnecessary electric energy loss (such as controlling the third switch module to be disconnected), and ensure the power supply safety; or in the process of controlling the battery core module to discharge by the monitoring management unit, if the storage capacity of the storage battery in the battery core module is detected to be smaller than the preset threshold value, the battery core module can be controlled to stop discharging so as to avoid over-discharging of the storage battery, thereby protecting the storage battery and prolonging the service life of the storage battery.
The preset threshold value can be 1% -90% of the total storage capacity according to actual situation requirements.
Therefore, when the direct current input end supplies power to the load through the first switch module and the second switch module, the path between the direct current input end and the load can be equivalent to a direct current bus, and as no other power consumption devices except the first switch module and the second switch module are arranged on the direct current bus, a control chip with low power consumption can be adopted by the monitoring management unit, and a plurality of switching devices with low power consumption can be adopted in the first switch module and the second switch module, so that the power supply system of the data center can be configured with a battery device to ensure the stability of the power supply of the load of the data center (for example, when the mains supply connected with the power supply system is abnormal, the battery device can be started to supply power to the load to ensure the stability of the power supply), and the battery device can directly supply power to the load continuously when the direct current input end is abnormal.
The battery device provided by the embodiment can independently operate and is arranged between the power supply system and the load of the data center, so that a plurality of similar battery devices are conveniently and simultaneously arranged between the power supply system and the load in a distributed mode, potential safety hazards caused by centralized arrangement of the battery devices can be avoided, the stability of the power supply system for supplying power to the load is guaranteed, meanwhile, when the power supply system can normally supply power to the load, each battery device can operate in a low-circuit-loss mode except charging, when the power supply system cannot normally supply power to the load, a storage battery in the battery device can be started for supplying power to the load, and therefore, whether the power supply of a direct-current input end is normal or not can be realized, uninterrupted power supply for the load can be realized through the battery device provided by the embodiment, and continuous and stable operation of the load is guaranteed. The battery core module can realize the controlled output of energy to the direct current input end through the controllable current flow direction, so that the battery energy in the whole power supply system is more fully utilized, the reliability and the stability of the whole data center power supply are ensured, and the terminal uninterruptible power supply solution is provided under the direct current input condition, so that the battery charge and discharge are controlled and independently operated.
Optionally, at least one battery core module is provided in each battery device, and in some alternative embodiments, a plurality of battery core modules (as shown in fig. 2) are provided in each battery device, and the plurality of battery core modules are arranged in parallel between the first switch module and the second switch module, so that the plurality of battery core modules can be connected in parallel to supply power to the load when necessary, thereby increasing the output power of the single battery device or improving the redundancy of the battery.
In an embodiment, on the basis of the above embodiment, the third switch module is provided with a first switch device; alternatively, referring to fig. 3, the third switching module is provided with a first switching device and a second switching device in parallel; alternatively, referring to fig. 4, the third switching module is provided with a first switching device and a second switching device in series;
the first switching device is a unidirectional conduction device, and the conduction direction is the direction from the storage battery to the load; the second switching device is a non-unidirectional conducting device; if the second switching device is connected with the first switching device in series, the second switching device is a normally open switching device; and if the second switching device is connected with the first switching device in parallel, the second switching device is in an off state when the storage battery is in a non-discharging state.
The first switching device may be a diode or a MOS transistor; the second switching device may be a non-unidirectional conducting device such as a contactor, relay, or the like.
Optionally, if only the first switching device is disposed in the third switching module and the first switching device is a diode, an anode of the diode may be used as a first conducting end of the third switching module and a cathode of the diode may be used as a second conducting end of the third switching module. When the direct current input end can normally supply power to a load, the cathode voltage of the diode is larger than the anode voltage, so that the diode is cut off, the third switch module is disconnected, and at the moment, the output end of the battery core module does not have current output; when the direct current input end cannot normally supply power to a load, the cathode voltage of the diode is smaller than the anode voltage, so that the diode is conducted, the third switch module is closed, the output end of the battery core module is provided with current output, and the current output by the output end of the battery core module can also supply power to the load through the second switch module. In this way, the third switch module can be automatically turned on or off according to the voltage difference between the first conducting end and the second conducting end of the third switch module.
Or the first switching device is a MOS tube, and the control signal output end of the monitoring management unit is electrically connected with the grid electrode of the MOS tube; if the MOS tube is a PMOS tube, the first conduction end of the third switch module is the drain electrode of the PMOS tube, and the second conduction end of the third switch module is the source electrode of the PMOS tube; if the MOS tube is an NMOS tube, the first conduction end of the third switch module is the source electrode of the NMOS tube, and the second conduction end of the third switch module is the drain electrode of the NMOS tube.
When the direct current input end can normally supply power to a load, the monitoring management unit can control the MOS tube to cut off so as to realize the disconnection of the third switch module, and at the moment, the output end of the battery core module does not have current output; when the direct current input end cannot normally supply power to a load, the monitoring management unit can control the MOS tube to be conducted, the third switch module is conducted, the output end of the battery core module is enabled to have current output, and the current output by the output end of the battery core module can also supply power to the load through the second switch module.
The body diode of the MOS tube is used as a unidirectional conduction function of the diode, and when the direct current input end is abnormal, current flows from the storage battery to the load through the body diode. When the current-carrying capacity of the body diode does not meet the load requirement, the body diode can be realized in a parallel connection homodromous diode mode.
Optionally, referring to fig. 3, if the third switch module is provided with the first switch device and the second switch device in parallel, two conducting ends of the second switch device are respectively and electrically connected between the first conducting end and the second conducting end of the first switch device (equivalent to a parallel circuit formed by the first switch device and the second switch device in the third switch module), and a control end of the second switch device is further electrically connected with a control signal output end of the monitoring management unit, where the monitoring management unit can control the second switch device to be opened or closed by outputting a corresponding control signal to the second switch device.
Optionally, when the storage battery is in a non-discharging state (at this time, the dc input terminal supplies power normally, and the battery core module has no discharging requirement), the monitoring management unit may control the second switching device to be in an off state (at this time, the first switching device is in an off state, so that the third switching module is in an off state (i.e. cannot be turned on by the first switching device or the second switching device)).
Optionally, when the power supply of the dc input end is abnormal, the first switching device is turned on first to realize that the third switching module is turned on, and at this time, the battery core module may output current through the third switching module (i.e. the output end of the battery core module has current output, and the current output may supply power to the load through the second switching module). At this time, when the monitoring management unit monitors that the battery core module has current output, the second switching device can be further controlled to be closed, and at this time, the current provided by the storage battery in the battery core module is output through the second switching device (at this time, if the first switching device is a MOS tube, the MOS tube can be simultaneously controlled to be cut off, and if the first switching device is a diode, the first switching device can not be conducted due to the fact that the voltages at two ends of the anode and the cathode are equal) because the branch loss corresponding to the second switching device is lower than that of the first switching device, so that the circuit loss of the storage battery during discharging can be reduced.
Alternatively, referring to fig. 4, if the first switching device and the second switching device are serially connected in the third switching module, the first switching device and the second switching device may be serially connected between the charge and discharge end of the storage battery and the load (as shown in fig. 4), or the second switching device and the first switching device may be serially connected between the charge and discharge end of the storage battery and the load (not shown in the figure).
Optionally, when the storage battery is in a non-discharging state (at this time, the direct current input terminal supplies power normally, and the battery core module has no discharging requirement), the monitoring management unit may control the second switching device to be in an off state (at this time, the first switching device is simultaneously in an off state, so that the third switching module is in a unidirectional off state (i.e. cannot be turned on by the first switching device and the second switching device)). And because the second switching device is a normally open switching device, when the battery device is not connected to the power supply system, the second switching device is disconnected because of uncontrollability, so that the storage battery cannot discharge outwards, the power consumption of the battery device is reduced, and the safety of the battery device during independent storage and transportation is ensured.
Optionally, in a state that the battery device is connected to the power supply system, when the power supply of the dc input end is abnormal, the first switching device is turned on, then the second switching device is controlled to be turned on, so as to realize the turning on of the third switching module, and at this time, the battery core module can output current through the third switching module (i.e. the output end of the battery core module has current output, and the current output can supply power to the load through the second switching module).
In an embodiment, referring to fig. 5, on the basis of the above embodiment, the battery device further includes a fourth switch module, where an input end of the first voltage transformation unit is electrically connected to the first switch module through the fourth switch module; the fourth switch module is a normally open switch device.
Optionally, the second conducting end of the fourth switch module is electrically connected to the input end of the first voltage transformation unit, and the first conducting end of the fourth switch module is electrically connected to the second conducting end of the first switch module.
Optionally, a controllable switching tube (such as a MOS tube) or a switching device (such as a contactor, a relay, etc.) may be disposed in the fourth switching module, and the monitoring management unit may control the switching tube and/or the switching device in the fourth switching module to be turned on or turned off so as to control the fourth switching module to be turned on or turned off. The control signal output end of the monitoring management unit is electrically connected with the control end of the fourth switch module, so that the monitoring management unit can control the fourth switch module to be closed or opened by outputting a corresponding control signal to the control end of the fourth switch module.
Optionally, the fourth switch module may also be a normally open switch device (such as a normally open contactor and a normally open relay), and when the fourth switch module does not receive the control signal output by the monitoring management unit, the fourth switch module maintains an off state; when the fourth switch module receives the control signal output by the monitoring management unit, the fourth switch module keeps a closed state.
When the fourth switch module is closed, a passage can be formed between the first conducting end and the second conducting end of the fourth switch module; when the fourth switch module is disconnected, an open circuit is formed between the first conducting end and the second conducting end of the fourth switch module.
Optionally, the monitoring management unit may be configured to monitor an electric quantity of the storage battery, and if the monitoring management unit monitors that the electric quantity of the storage battery is not full, control the fourth switch module to be closed, so that when the power supply of the dc input end is normal, the current input by the dc input end may be sequentially output to the first voltage transformation unit through the first switch module and the fourth switch module, and the voltage transformation unit performs voltage transformation to charge the storage battery; if the monitoring management unit monitors that the electric quantity of the storage battery is full, the fourth switch module can be controlled to be disconnected, and even if the power supply of the direct current input end is normal, the first voltage transformation unit is in a power-off state and does not generate power consumption, so that the purpose of energy conservation is achieved. When the storage battery needs to work in a floating charge state, the switch module can be kept in a closed state, and the first transformation unit keeps the floating charge voltage output required by the storage battery.
In addition, the control signal output end of the monitoring management unit can be electrically connected with the control end of the first voltage transformation unit, so that the monitoring management unit can set working parameters of the first voltage transformation unit by outputting corresponding control signals to the first voltage transformation unit, the first voltage transformation unit can convert received direct current voltage into corresponding direct current voltage according to the charging requirement of a storage battery (namely, the monitoring management unit can allocate the voltage converted by the first voltage transformation unit according to the charging requirement).
In an embodiment, referring to fig. 6, if only the first switching device is provided in the third switching module on the basis of the above embodiment, the battery core module further includes a fifth switching module, and the charge-discharge end of the storage battery is electrically connected to the output end of the first voltage transformation unit and the first conduction end of the third switching module through the fifth switching module; the third switch module and the fifth switch module are normally open switch devices.
In this embodiment, when only the first switching device is separately provided in the third switching module, in order to ensure the use safety of the battery device, a fifth switching module is further required to be provided between the charge and discharge end of the storage battery and the first conductive end of the third switching module. And the first conducting end of the fifth switch module is electrically connected with the output end of the first voltage transformation unit, and the second conducting end of the fifth switch module is electrically connected with the charge and discharge end of the storage battery.
Optionally, controllable switching devices (such as contactors and relays) may be disposed in the fifth switch module, and the monitoring management unit may control on or off of the switching tubes and/or the switching devices in the fifth switch module to control on or off of the fifth switch module. The control signal output end of the monitoring management unit is electrically connected with the control end of the fifth switch module, so that the fifth switch module can be controlled to be closed or opened by outputting a corresponding control signal to the control end of the fifth switch module.
Optionally, the fifth switch module is a normally open switch device (such as a normally open contactor and a normally open relay), and when the fifth switch module does not receive the control signal output by the monitoring management unit, the fifth switch module maintains an off state; when the fifth switch module receives the control signal output by the monitoring management unit, the fifth switch module keeps a closed state.
When the fifth switch module is closed, a passage can be formed between the first conducting end and the second conducting end of the fifth switch module; when the fifth switch module is disconnected, an open circuit is formed between the first conducting end and the second conducting end of the fifth switch module.
Therefore, when the battery device is not connected to the power supply system, the fifth switch module is disconnected because of uncontrollability, so that the storage battery cannot discharge outwards, the power consumption of the battery device is reduced, and the safety of the battery device in independent storage and transportation is ensured.
Optionally, the monitoring management unit may be further configured to monitor a health status of the storage battery, and if the monitoring management unit monitors that the storage battery is normal (for example, the storage battery can be charged or discharged normally), control the fifth switch module to be closed, so that the storage battery can be charged or discharged; if the monitoring management unit monitors that the storage battery is abnormal (such as incapable of being charged or discharged normally), the storage battery is judged to be faulty, and the fifth switch module can be controlled to be disconnected in time, so that the storage battery is disconnected with other circuit modules in the battery device, and the faulty storage battery is prevented from affecting the other circuit modules and damaging components of the other circuit modules.
It should be noted that the battery device structures shown in fig. 1, 5 and 6 are only exemplary structures, and should not be construed as limiting the combination of the embodiments of the present application, and the second switch module, the fourth switch module and the fifth switch module may be arbitrarily combined.
In an embodiment, based on the above embodiment, a third switching device is disposed in the first switching module; alternatively, referring to fig. 7, a third switching device and a fourth switching device are disposed in parallel in the first switching module;
the third switching device is a unidirectional conduction device, and the conduction direction is from the direct current input end to the load; the fourth switching device is a non-unidirectional conduction device, and is in an off state when the battery core module is in a discharge state.
Alternatively, only one unidirectional conduction switching device (labeled as a third switching device) may be disposed in the first switching module; the first switch module may be provided with a third switch device and a fourth switch device in parallel, where the third switch device is a unidirectional conduction switch device, and the fourth switch device is a non-unidirectional conduction device.
The third switching device may be a diode or a MOS transistor; the fourth switching device may be a non-unidirectional conductive device such as a contactor, a relay, or the like.
Alternatively, if the third switching device is a diode, the anode of the diode may be used as the first conducting terminal of the first switching module, and the cathode of the diode may be used as the second conducting terminal of the first switching module. When the power supply of the direct current input end is normal, the anode voltage of the diode is enabled to be larger than the cathode voltage, the diode is further enabled to be conducted, the first switch module is closed, meanwhile, the monitoring management unit controls the second switch module to be closed, and accordingly, a passage can be formed between the direct current input end and the load through the first switch module and the second switch module, so that the current input by the direct current input end flows to the load, and/or a storage battery in the battery core module is charged; when the power supply of the direct current input end is abnormal, the monitoring management unit needs to control the battery core module to discharge to the load through the second switch module, and the current output by the output end of the battery core module can be prevented from flowing backwards to the direct current input end due to the unidirectional conduction characteristic of the third switch device.
Alternatively, a MOS transistor may be used instead of the diode as the third switching device, and the control signal output end of the monitoring management unit is electrically connected to the gate of the MOS transistor; if the MOS tube is a PMOS tube, the first conduction end of the third switching device is the drain electrode of the PMOS tube, and the second conduction end of the third switching device is the source electrode of the PMOS tube; if the MOS tube is an NMOS tube, the first conduction end of the third switching device is the source electrode of the NMOS tube, and the second conduction end of the third switching device is the drain electrode of the NMOS tube.
When the power supply of the direct current input end is normal, the monitoring management unit controls the third switching device to be conducted so as to realize the closing of the first switching module, and simultaneously controls the second switching module to be closed so as to realize the control of the first switching module and the second switching module to form a passage between the direct current input end and the load, so that the current input by the direct current input end flows to the load and/or the storage battery in the battery core module is charged; when the power supply of the direct current input end is abnormal, the monitoring management unit needs to control the battery core module to discharge to the load through the second switch module, and the current output by the output end of the battery core module can be prevented from flowing backwards to the direct current input end due to the unidirectional conduction characteristic of the third switch device.
Optionally, if the first switch module is provided with a third switch device and a fourth switch device in parallel, two conducting ends of the fourth switch device are respectively and electrically connected between the first conducting end and the second conducting end of the third switch device (equivalent to a parallel circuit formed by the third switch device and the fourth switch device in the first switch module), and a control end of the fourth switch device is further electrically connected with a control signal output end of the monitoring management unit, and the monitoring management unit can output a corresponding control signal to the fourth switch device to control the fourth switch device to be opened or closed.
Optionally, when the battery core module is in a discharging state (at this time, the dc input end is abnormal in power supply, the monitoring management unit needs to control the battery core module to discharge to the load), the monitoring management unit may control the fourth switching device to be in an off state, and control the third switching device to be in an off state, so that the first switching module is in an off state (i.e., the first conducting end and the second conducting end of the first switching module cannot be conducted), so that the battery core module cannot flow backward to the dc input end through the current output to the load.
Optionally, when the power supply of the dc input end is normal, the third switching device is turned on first to realize that the first switching module is turned on, and at this time, the current input by the dc input end may flow to the load and/or the battery core module through the third switching device in the first switching module. At this time, when the monitoring management unit monitors that the power supply of the direct current input end is normal, the fourth switching device can be further controlled to be closed, and at this time, the current input by the direct current input end can bypass the branch where the third switching device is located and flow to the load and/or the battery core module through the branch where the fourth switching device is located (at this time, if the third switching device is an MOS tube, the MOS tube can be simultaneously controlled to be cut off, and if the third switching device is a diode, the third switching device can not be turned on due to the fact that the voltages at two ends of the anode and the cathode are equal), so that the circuit loss is reduced.
In an embodiment, referring to fig. 8, on the basis of the foregoing embodiment, the battery device further includes a second voltage transformation unit, an input end of the second voltage transformation unit is electrically connected to an output end of the battery core module, and an output end of the second voltage transformation unit is electrically connected to the dc input end; the second voltage transformation unit is used for enabling the current output by the battery core module to flow to the direct current input end.
In this embodiment, the power supply system to which the battery device is connected includes a plurality of dc output terminals, each of the dc output terminals may be electrically connected to at least one battery device, and the dc input terminal of each of the battery devices is electrically connected to the corresponding dc output terminal.
Alternatively, each battery device may include a second transforming unit in addition to the structural units described in the above embodiments. The input end of the second voltage transformation unit is electrically connected with the output end of the battery core module, and the output end of the second voltage transformation unit is electrically connected with the direct current input end, so that the voltage output by the second voltage transformation unit can be directly supplied to the direct current output end.
The second transforming unit may be a DC/DC (direct current to direct current) voltage power converting unit, and the second transforming unit may be configured to convert a direct current voltage output from the storage battery through the battery core module into a preset voltage.
Optionally, the control end of the second voltage transformation unit is electrically connected with the control signal output end of the monitoring management unit and is controlled by the monitoring management unit, so that the monitoring management unit can output corresponding control signals to the second voltage transformation unit to set working parameters of the second voltage transformation unit, and the second voltage transformation unit can convert the direct current voltage output by the storage battery into corresponding preset voltage.
Optionally, if the battery device at the home terminal detects that the power supply of other battery devices (i.e. among the plurality of battery devices connected to the power supply system, other battery devices except the battery device at the home terminal) is insufficient, if the electric quantity of the storage battery at the home terminal is detected to satisfy the condition that the load connected to the home terminal has a margin (or the load connected to the home terminal has no power supply requirement), the battery core module can be controlled to discharge to the second voltage transformation unit, so that the current provided by the storage battery at the home terminal can flow to the direct current input terminal through the second voltage transformation unit, and the direct current input terminal at the home terminal supplies power to other battery modules with power shortage through the direct current input terminal of the power supply system, so as to realize the mutual allocation of the electric quantity among the plurality of battery devices connected to the power supply system, and ensure the stability of the power supply system to the load of the data center as a whole.
When other battery devices are in short supply (for example, the storage battery in the other battery devices is in short supply, and the power supply system is not provided with external power input or the external power input is in short supply for all battery devices), electric quantity allocation information (which can contain specific short supply, for example, the power of a certain rack is larger, so that the electric quantity of the battery is quickly reduced to be insufficient to support load power or the support time is shorter, and other batteries in the power supply system are in excess of the electric quantity required by the power supply of the rack, the battery devices of the rack can control output power to a shared bus (direct current input end) through a second voltage transformation unit), so that the battery devices with sufficient electric quantity can learn the situation that other battery devices are in short supply, and judge whether to supply power to the other battery devices according to the situation of the electric quantity of the battery devices; similarly, if the battery device at the local end is in the power failure state, the power allocation information can be sent to the battery device with sufficient power, so that the insufficient power can be supplemented from the battery device with sufficient power. In such a charge allocation mode, only the power supply to the load is guaranteed, and the battery is generally not charged.
In an embodiment, on the basis of the above embodiment, the monitoring management unit includes a control unit;
or the monitoring management unit comprises two control units, namely a first control unit and a second control unit, wherein the first control unit is responsible for overall management and external communication work of the battery device, the second control unit is responsible for management work of the battery device, and the management work of the battery device comprises management work of the battery core module.
In this embodiment, the monitoring management unit is provided with a general control unit, and the control unit monitors and controls the circuits or components in the battery device, and is responsible for overall management of the battery device, management of the battery core module, and external communication.
Or, the monitoring and managing unit may be composed of two control units, and divided into a first control unit and a second control unit, where the first control unit is responsible for overall management and external communication work of the battery device, and the second control unit is responsible for management work of the battery core module.
The first control unit is provided with a communication module which supports wired communication or wireless communication, and the first control unit can communicate outwards based on the communication module. For example, the power supply system is a power supply system of a battery device or other designed upper management units, and the peer control unit is a first control unit of other battery devices.
Optionally, the first control unit may also be used to directly monitor and control a circuit (including monitoring and controlling components in the circuit, such as adjusting an operating parameter of the second voltage transformation unit, controlling the closing or opening of the fourth switching device, and collecting operation information) other than the battery core module in the battery device, and directly take charge of management work of the circuit (including managing components in the circuit); the second control unit is responsible for managing the battery body (including collecting the voltage of the battery cell, detecting the temperature of the battery, monitoring and controlling the components in the circuit, managing the charge and discharge of the battery, controlling the related switch components, alarming the abnormality in the battery operation), managing the battery core module (such as managing the charge and discharge of the battery core module), establishing communication connection with the first control unit, reporting the monitoring data of the battery core module (including the electric quantity of the storage battery, the current value of each place in the battery core module, etc.) to the first control unit by the second control unit, and executing corresponding control operation on the battery core module based on the control instruction sent by the first control unit, i.e. the first control unit can monitor and control the battery core module through the second control unit (which is equivalent to the master control unit in the battery device, and the second control unit is the slave control unit in the battery device), and managing the battery core module.
The second control unit may be a BMS (BATTERY MANAGEMENT SYSTEM ).
In an embodiment, based on the foregoing embodiment, the monitoring management unit is further configured to detect whether the dc input terminal is powered normally, or the monitoring management unit learns, through a communication manner, whether the dc input terminal is powered normally;
and/or the monitoring management unit is also used for monitoring the current direction input by the direct current input end;
and/or the monitoring management unit is also used for managing and controlling the charging time of the battery core module;
and/or the monitoring management unit is also used for managing and controlling the discharge of the battery core module to the direct current input end side;
and/or the monitoring management unit is also used for collecting the operation information of the battery device and carrying out safety management according to the collected information;
and/or the monitoring management unit is also used for providing operation information and a control interface for a user through a communication or display interface.
In this embodiment, the monitoring management unit may be configured to detect whether the power supply of the dc input terminal is normal, if it is detected that the dc voltage input by the dc input terminal is greater than or equal to a preset value, determine that the power supply of the dc input terminal is normal, and if it is detected that the dc voltage input by the dc input terminal is less than the preset value (including the case that the dc voltage is zero), determine that the power supply of the dc input terminal is abnormal. Or the monitoring management unit acquires whether the direct current input end is normally powered or not through a communication mode from the power supply system, wherein the monitoring management unit can acquire communication information from the power supply system through the communication mode and acquires whether the direct current input end is normally powered or not based on the communication information.
Optionally, the monitoring management unit is further configured to monitor a current direction input by the dc input terminal. Especially when the switching device of the indistinguishable direction is used in the first switching module, when the direction of the input current is detected to be reversed, the switching device of the indistinguishable direction needs to be immediately turned off, and only the device from the direct current input side to the load direction is kept on (such as a diode and the like); for discharging from the battery to the dc input, a controlled discharge by means of a second transformer unit is required.
Optionally, the monitoring management unit is further configured to manage and control charging time of the battery core module, and if the electric quantity of the storage battery in the battery core module is monitored to be less than the preset electric quantity when the power supply of the direct current input end is normal, control the battery core module to charge; the preset value can be set according to actual conditions, for example, 10% -95% of the total electric quantity.
Optionally, the monitoring management unit is further configured to manage and control discharge of the battery core module to the dc input terminal side.
Optionally, the monitoring management unit is further configured to collect operation information of the battery device, and perform safety management according to the collected information, for example, if the collected information indicates that the storage battery cannot be charged or discharged normally, then the fifth switch module is controlled to be turned off, or the third switch module and the fourth switch module are controlled to be turned off.
Optionally, the monitoring management unit is further configured to provide operation information and a control interface for the user through a communication or display interface, where the monitoring management unit may establish a communication connection with an associated device of the user and send the operation information of the battery device to the associated device, and of course, the user may also send a control instruction to the monitoring management unit through the associated device, so as to implement management and control of the battery device based on the control instruction. The associated equipment can be a background server, a handheld mobile device, an intelligent computer, a display device and the like.
Referring to fig. 9, a power supply system further provided by the present invention includes a current source and a plurality of battery devices, and the specific structure of any one of the battery devices can refer to the above embodiments.
Optionally, the dc input of each battery device is electrically connected to the dc output of the dc source. The direct current source can be used for accessing external energy (such as alternating current commercial power), and converts the external energy into direct current suitable for loads of the data center, and then outputs the direct current to each battery device.
Optionally, between the same load and the dc output end of the dc source, one battery device may be separately set to supply power to the load, or multiple battery devices may be simultaneously set in parallel to supply power to the load in parallel. For example, in a data center application scenario, a set of battery devices may be disposed in each server rack to supply power to loads in the rack, and a plurality of server racks are disposed in the machine room.
Optionally, an external energy conversion module and a power distribution module may be disposed in the dc source, where the external energy conversion module is used to access an external energy source and convert the external energy source into dc; the power distribution module is used for distributing and outputting the converted direct current to each battery device through each direct current output end.
Optionally, the monitoring management unit in the battery device is configured to control the first switch module in the battery device to prevent the battery device from outputting energy to the dc source side uncontrollably or cut off a path from the battery device side to the dc source side when the dc source cannot output power or is abnormal.
If the monitoring management unit in the battery device monitors that the direct current source cannot output power or monitors that the direct current source is abnormal in power supply, the first switch module can be subjected to corresponding control measures to avoid that one side of the battery device outputs energy to one side of the direct current source uncontrollably, namely, only the energy can be output to one side of the direct current source under the controlled condition. For example, when the dc source cannot output power or is abnormal, if the battery device with surplus electric power needs to supply power to other battery devices with non-surplus electric power, the first switch module may be controlled to be turned on at this time, so that the battery core module in the battery device with surplus electric power provides voltage through the second voltage transformation unit, and controllable power supply from the battery device with surplus electric power to the dc source is realized, so that the output electric energy is transferred to the battery device with insufficient power supply through the dc source; when the battery device does not need to supply power to other battery devices with non-redundant electric quantity, the first switch module can be controlled to be turned off at the moment so as to prevent the battery device from supplying power to the direct current source unnecessarily.
Or when the direct current source is monitored to be incapable of outputting power or abnormal power supply of the direct current source is monitored, the first switch module can be directly controlled to be disconnected, so that a path for outputting energy to one side of the direct current source from one side of the battery device is cut off, and unnecessary power supply to the direct current source by the battery device is avoided.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, apparatus, article or method that comprises the element.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims (10)

1. The battery device adopting direct current input is characterized by comprising a direct current input end, a monitoring management unit, a first switch module, a second switch module and a battery core module, wherein the first switch module and the second switch module are sequentially connected in series between the direct current input end and a load, the battery core module comprises a storage battery, a first voltage transformation unit and a third switch module, the input end of the first voltage transformation unit is electrically connected with the direct current input end through the first switch module, the charge and discharge end of the storage battery is electrically connected with the output end of the first voltage transformation unit and the first conduction end of the third switch module, and the second conduction end of the third switch module is electrically connected with the load through the second switch module;
the monitoring management unit is used for monitoring and controlling the battery device, is responsible for management work of the battery device, and controls the first switch module to form a passage between the direct current input end and the load when the direct current input end supplies power normally, so that current input by the direct current input end flows to the load and/or the storage battery is charged through the first voltage transformation unit; when the power supply of the direct current input end is abnormal, the output current of the storage battery flows to the load through the third switch module and the second switch module in sequence, so that the battery core module discharges to the load; and controlling the battery core module to stop discharging through the third switch module when the load is abnormal or the storage capacity of the storage battery is smaller than a preset threshold value.
2. The battery device using direct current input according to claim 1, wherein a first switching device is provided in the third switching module; or, the third switch module is provided with a first switch device and a second switch device in parallel; or, the third switch module is provided with a first switch device and a second switch device in series;
the first switching device is a unidirectional conduction device, and the conduction direction is the direction from the storage battery to the load; the second switching device is a non-unidirectional conducting device;
if the second switching device is connected with the first switching device in series, the second switching device is a normally open switching device; and if the second switching device is connected with the first switching device in parallel, the second switching device is in an off state when the storage battery is in a non-discharging state.
3. The battery device using direct current input according to claim 1, further comprising a fourth switch module, wherein an input terminal of the first transforming unit is electrically connected to the first switch module via the fourth switch module; the fourth switch module is a normally open switch device.
4. The battery device according to claim 2, wherein if only the first switching device is provided in the third switching module, the battery core module further includes a fifth switching module, and the charge and discharge end of the storage battery is electrically connected to the output end of the first transforming unit and the first conducting end of the third switching module through the fifth switching module; the fifth switch module is a normally open switch device.
5. The battery device using direct current input according to claim 1, wherein a third switching device is provided in the first switching module; or, a third switching device and a fourth switching device are arranged in the first switching module in parallel;
the third switching device is a unidirectional conduction device, and the conduction direction is from the direct current input end to the load; the fourth switching device is a non-unidirectional conduction device, and is in an off state when the battery core module is in a discharge state.
6. The battery device using direct current input according to claim 1, further comprising a second voltage transformation unit, wherein an input terminal of the second voltage transformation unit is electrically connected to an output terminal of the battery core module, and an output terminal of the second voltage transformation unit is electrically connected to the direct current input terminal.
7. The battery device employing direct current input according to any one of claims 1 to 6, wherein the monitoring management unit includes a control unit;
or the monitoring management unit comprises two control units, namely a first control unit and a second control unit, wherein the first control unit is responsible for overall management and external communication work of the battery device, the second control unit is responsible for management work of the battery device, and the management work of the battery device comprises management work of the battery core module.
8. The battery device according to any one of claims 1 to 6, wherein the monitoring management unit is configured to detect whether the dc input terminal is powered normally or learn, by communication, whether the dc input terminal is powered normally;
and/or the monitoring management unit is also used for monitoring the current direction input by the direct current input end;
and/or the monitoring management unit is also used for managing and controlling the charging time of the battery core module;
and/or the monitoring management unit is also used for managing and controlling the discharge of the battery core module to the direct current input end side;
And/or the monitoring management unit is also used for collecting the operation information of the battery device and carrying out safety management according to the collected information;
and/or the monitoring management unit is also used for providing operation information and a control interface for a user through a communication or display interface.
9. A power supply system comprising a direct current source and a plurality of battery devices, wherein the battery devices are the battery devices using direct current input as claimed in any one of claims 1 to 8; the direct current input end of each battery device is electrically connected with the direct current output end of the direct current source.
10. The power supply system according to claim 9, wherein the monitoring management unit in the battery device is configured to control the first switch module in the battery device to prevent the battery device from uncontrollably outputting energy to the dc source side or to cut off the path of the battery device from outputting energy to the dc source side when the dc source is unable to output power or abnormal.
CN202310528345.3A 2023-05-11 2023-05-11 Battery device and power supply system using DC input Pending CN116667482A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117748690A (en) * 2024-02-19 2024-03-22 西安图为电气技术有限公司 Charging and discharging circuit of battery and charging and discharging method of battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117748690A (en) * 2024-02-19 2024-03-22 西安图为电气技术有限公司 Charging and discharging circuit of battery and charging and discharging method of battery

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