CN116014829A - Lithium battery system, control method and device, storage medium and processor - Google Patents
Lithium battery system, control method and device, storage medium and processor Download PDFInfo
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- CN116014829A CN116014829A CN202111236365.0A CN202111236365A CN116014829A CN 116014829 A CN116014829 A CN 116014829A CN 202111236365 A CN202111236365 A CN 202111236365A CN 116014829 A CN116014829 A CN 116014829A
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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
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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
- 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
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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
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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 application discloses a lithium battery system, a control method, a control device, a storage medium and a processor. The method comprises the following steps: judging the connection state of a lithium battery pack in the current lithium battery system according to the data interaction condition of the lithium battery system; if a plurality of lithium battery packs are connected in parallel, controlling the target lithium battery pack to be connected into a lithium battery system according to data interaction among the lithium battery packs; if a plurality of lithium battery boxes are connected in series in the target lithium battery pack, the on-off of the target lithium battery boxes is controlled according to the data interaction in the plurality of lithium battery boxes. Through this application, solved the lithium battery system among the prior art and be difficult to the extension, lead to the problem that can't satisfy the demand of UPS equipment.
Description
Technical Field
The application relates to the technical field of lithium battery processing, in particular to a lithium battery system, a control method, a control device, a storage medium and a processor.
Background
Currently, along with the increasing maturity of the related technology of lithium batteries and the continuous reduction of the cost of the lithium batteries, a storage battery matched with a product of an uninterruptible power supply system (UPS for short) is transited from a lead storage battery to the lithium battery. A typical lithium battery system boosts voltage by cell series and capacity by cell parallel, which is suitable for application in a system with fixed voltage and fixed capacity. The matching of the current UPS product and the lithium battery box generally supplies power for a single lithium battery pack, and the voltage level is not easy to expand, so that the expansibility of the system is poor, as shown in fig. 1 and 2. However, a lithium battery system with expandable capacity and voltage is required in the UPS device, and thus, the lithium battery system in the prior art is difficult to expand, so that the requirements of the UPS device cannot be satisfied.
Aiming at the problem that the lithium battery system in the prior art is difficult to expand and cannot meet the requirement of UPS equipment, no effective solution is proposed at present.
Disclosure of Invention
The main objective of the present application is to provide a lithium battery system, a control method, a control device, a storage medium and a processor, so as to solve the problem that the lithium battery system in the prior art is difficult to expand, and thus cannot meet the requirements of UPS equipment.
In order to achieve the above object, according to one aspect of the present application, there is provided a lithium battery system. The system comprises: the lithium battery pack comprises a plurality of lithium battery packs, wherein each lithium battery pack is formed by connecting a plurality of lithium battery boxes in series; the lithium battery box comprises a lithium battery, a main relay, a pre-charging relay and a pre-charging resistor; the second end of the main relay is connected with the positive electrode of the lithium battery, and charge and discharge of the lithium battery are controlled through the main relay; the first end of the pre-charging relay is connected with the first end of the main relay, the second end of the pre-charging relay is connected with the first end of the pre-charging resistor, the second end of the pre-charging resistor is connected with the positive electrode of the lithium battery, and the pre-charging of the lithium battery is controlled through the pre-charging relay.
Further, the lithium battery pack includes: connecting a plurality of lithium battery boxes in series according to a preset voltage value, and carrying out data interaction among the lithium battery boxes through intra-group communication lines; when the lithium battery pack is connected to the lithium battery bus, the lithium battery box with the positive electrode connected with the lithium battery bus is a main lithium battery box, and the rest lithium battery boxes are auxiliary lithium battery boxes.
Further, the lithium battery system includes: and connecting a plurality of lithium battery packs in parallel according to a preset capacity value, and carrying out data interaction among the lithium battery packs through a system communication line.
In order to achieve the above object, according to another aspect of the present application, there is provided a control method of a lithium battery system. The method comprises the following steps: judging the connection state of a lithium battery pack in the current lithium battery system according to the data interaction condition of the lithium battery system; if a plurality of lithium battery packs are connected in parallel, controlling the target lithium battery pack to be connected into a lithium battery system according to data interaction among the lithium battery packs; if a plurality of lithium battery boxes are connected in series in the target lithium battery pack, the on-off of the target lithium battery boxes is controlled according to the data interaction in the plurality of lithium battery boxes.
Further, according to the data interaction in the plurality of lithium battery box groups, controlling the on-off of the target lithium battery box further comprises: identifying a master lithium battery box and a slave lithium battery box through address information of each lithium battery box in the target lithium battery pack; if the self-inspection of the secondary lithium battery box is fault-free, the main relay of the secondary lithium battery box is controlled to be closed, and a closing signal is sent to the main lithium battery box; under the condition that the main lithium battery box receives a closing signal, starting self-checking; and if the self-inspection of the main lithium battery box is fault-free, controlling the main relay of the main lithium battery box to be closed.
Further, according to the data interaction in the plurality of lithium battery box groups, controlling the on-off of the target lithium battery box further comprises: if the self-check of the secondary lithium battery box has a fault, controlling the main relay and the pre-charging relay of the secondary lithium battery box to be in a disconnected state, and sending a fault signal I to the main lithium battery box; if the main lithium battery box receives the first fault signal of the secondary lithium battery box or the self-detection of the main lithium battery box has faults, the main relay and the pre-charging relay of the main lithium battery box are controlled to be in the disconnection state, and the second fault signal is sent to a target system where the lithium battery system is located.
Further, according to the data interaction between each lithium battery pack, controlling the target lithium battery pack to be connected to the lithium battery system further comprises: if the lithium battery bus is connected to the first lithium battery pack and is connected to the second lithium battery pack, controlling the first lithium battery pack to start charging, and when the voltage difference between the first lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold value, sending a target signal to the second lithium battery pack by the first lithium battery pack, wherein the voltage of the second lithium battery pack is higher than that of the first lithium battery pack; in the charging process of the first lithium battery pack, the main relay and the pre-charging relay of the second lithium battery pack are in an off state; and under the condition that the second lithium battery pack receives the target signal, controlling the main relay of the second lithium battery pack to be closed.
Further, according to the data interaction between each lithium battery pack, controlling the target lithium battery pack to be connected to the lithium battery system further comprises: if the first lithium battery pack is connected into the lithium battery bus, and the second lithium battery pack is connected into the lithium battery bus, the pre-charging relay of the second lithium battery pack is controlled to be closed, and charging is started; when the voltage difference between the second lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold, the main relay of the second lithium battery pack is controlled to be closed, and the pre-charging relay is controlled to be opened, wherein the voltage of the second lithium battery pack is lower than that of the first lithium battery pack.
Further, according to the data interaction between each lithium battery pack, controlling the target lithium battery pack to be connected to the lithium battery system further comprises: if the lithium battery busbar is not connected with the lithium battery packs, when a plurality of lithium battery packs are detected to be simultaneously connected with the lithium battery packs, the lithium battery packs interact data through a system communication line, the voltage values of the lithium battery packs are compared, and the lithium battery packs are sequentially connected with the lithium battery system according to the sequence from low voltage values to high voltage values.
In order to achieve the above object, according to another aspect of the present application, there is provided a control device. The device comprises: the judging unit is used for judging the connection state of the lithium battery pack in the current lithium battery system according to the data interaction condition of the lithium battery system; the first control unit is used for controlling the target lithium battery pack to be connected into the lithium battery system according to data interaction among the lithium battery packs if a plurality of lithium battery packs are connected in parallel; and the second control unit is used for controlling the on-off of the target lithium battery boxes according to the data interaction in the plurality of lithium battery box groups if the plurality of lithium battery boxes are connected in series in the target lithium battery group.
Further, the second control unit further includes: the identification module is used for identifying the master lithium battery box and the slave lithium battery boxes through the address information of each lithium battery box in the target lithium battery pack; the first control module is used for controlling the main relay of the secondary lithium battery box to be closed if the secondary lithium battery box has no fault in self-detection, and sending a closing signal to the main lithium battery box; the self-checking module is used for starting self-checking under the condition that the main relay of the slave lithium battery box is closed when the main lithium battery box receives a signal from the slave lithium battery box; and the second control module is used for controlling the main relay of the main lithium battery box to be closed if the self-check of the main lithium battery box is fault-free.
Further, the apparatus further comprises: the third control unit is used for controlling the main relay and the pre-charging relay of the secondary lithium battery box to be in a disconnected state if the secondary lithium battery box self-tests to have faults, and sending a fault signal I to the main lithium battery box; and the fourth control unit is used for controlling the main relay and the pre-charging relay of the main lithium battery box to be in a disconnected state and sending the fault signal II to a target system where the lithium battery system is located if the main lithium battery box receives the fault signal I of the auxiliary lithium battery box or the self-inspection of the main lithium battery box has faults.
Further, the first control unit further includes: the third control module is used for controlling the lithium battery pack to be charged initially if the lithium battery bus is connected with the first lithium battery pack and is connected with the second lithium battery pack, and sending a target signal to the second lithium battery pack by the lithium battery pack when the voltage difference between the first lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold value, wherein the voltage of the second lithium battery pack is higher than that of the first lithium battery pack; in the charging process of the first lithium battery pack, the main relay and the pre-charging relay of the second lithium battery pack are in an off state; and the fourth control module is used for controlling the main relay of the second lithium battery pack to be closed under the condition that the second lithium battery pack receives the target signal.
Further, the first control unit further includes: the fifth control module is used for controlling the closing of the pre-charging relay of the second lithium battery pack to start charging if the first lithium battery pack is connected into the bus of the lithium battery pack and the second lithium battery pack is connected into the bus of the lithium battery pack; when the voltage difference between the second lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold, the main relay of the second lithium battery pack is controlled to be closed, and the pre-charging relay is controlled to be opened, wherein the voltage of the second lithium battery pack is lower than that of the first lithium battery pack.
Further, the first control unit further includes: and the sixth control module is used for comparing the voltage values of the lithium battery packs and sequentially connecting the lithium battery packs into the lithium battery system according to the sequence from low voltage value to high voltage value if the lithium battery packs are not connected into the lithium battery bus and when the simultaneous combination of the plurality of lithium battery packs into the lithium battery packs is detected.
In order to achieve the above object, according to another aspect of the present application, there is provided a computer-readable storage medium including a stored program, wherein the program performs the control method of the lithium battery system according to any one of the above.
In order to achieve the above object, according to another aspect of the present application, there is provided a processor for running a program, wherein the program runs to execute the control method of the lithium battery system as set forth in any one of the above.
The lithium battery system provided by the application comprises the following components: the lithium battery pack comprises a plurality of lithium battery packs, wherein each lithium battery pack is formed by connecting a plurality of lithium battery boxes in series; the lithium battery case includes: the lithium battery, the main relay, the pre-charging relay and the pre-charging resistor; the second end of the main relay is connected with the anode of the lithium battery, and charge and discharge of the lithium battery are controlled through the main relay; the first end of precharge relay is connected the first end of main relay, the second end of precharge relay is connected the first end of precharge resistor, the second end of precharge resistor is connected the positive pole of lithium cell, through precharge relay control the precharge of lithium cell, solved the lithium cell system among the prior art and be difficult to expand, lead to unable problem that satisfies the demand of UPS equipment. A plurality of lithium battery boxes are connected in series to form a lithium battery pack, and a plurality of lithium battery packs are connected in parallel to form a lithium battery system, so that the capacity and the voltage of the obtained lithium battery system can be expanded, and the technical effect of expanding the lithium battery system is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. In the drawings:
fig. 1 is a schematic view of a lithium battery case in the related art;
fig. 2 is a schematic diagram of a lithium battery system in the related art;
fig. 3 is a schematic diagram of a lithium battery system provided according to an embodiment of the present application;
fig. 4 is a schematic view of a lithium battery case provided according to an embodiment of the present application;
fig. 5 is a schematic diagram of a lithium battery pack provided according to an embodiment of the present application;
fig. 6 is a flowchart of a control method of a lithium battery system provided according to an embodiment of the present application;
fig. 7 is a schematic view of a control device of a lithium battery system according to an embodiment of the present application.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described with reference to preferred embodiments, and fig. 3 is a schematic diagram of a lithium battery system according to an embodiment of the present application, where the lithium battery system includes:
the lithium battery pack comprises a plurality of lithium battery packs, wherein each lithium battery pack is formed by connecting a plurality of lithium battery boxes in series; the lithium battery box comprises a lithium battery, a main relay, a pre-charging relay and a pre-charging resistor; the second end of the main relay is connected with the anode of the lithium battery, and charge and discharge of the lithium battery are controlled through the main relay; the first end of the pre-charging relay is connected with the first end of the main relay, the second end of the pre-charging relay is connected with the first end of the pre-charging resistor, the second end of the pre-charging resistor is connected with the positive electrode of the lithium battery, and the pre-charging of the lithium battery is controlled through the pre-charging relay.
The composition of the lithium battery case may be as shown in fig. 4, in which K1 (corresponding to the above-described main relay), K2 (corresponding to the above-described precharge relay), and R (corresponding to the above-described precharge resistor). When the lithium battery box is used, K1 is closed, K2 is opened, and the lithium battery box is charged and discharged through K1; when K1 is opened and K2 is closed, the lithium battery box is precharged through K2. The precharge arrangement can avoid damage to the lithium battery case from overshoots.
Through the scheme, the problem that the lithium battery system in the prior art is difficult to expand and cannot meet the requirements of UPS equipment is solved. A plurality of lithium battery boxes are connected in series to form a lithium battery pack, and a plurality of lithium battery packs are connected in parallel to form a lithium battery system, so that the capacity and the voltage of the obtained lithium battery system can be expanded, and the technical effect of expanding the lithium battery system is achieved.
Optionally, in the lithium battery system provided in the embodiment of the present application, the lithium battery pack includes: connecting a plurality of lithium battery boxes in series according to a preset voltage value, and carrying out data interaction among the lithium battery boxes through intra-group communication lines; when the lithium battery pack is connected to the lithium battery bus, the lithium battery box with the positive electrode connected with the lithium battery bus is a main lithium battery box, and the rest lithium battery boxes are auxiliary lithium battery boxes.
As shown in fig. 5, two lithium battery boxes are connected in series to be used as one lithium battery pack. A is used as a main lithium battery box, and B is used as a secondary lithium battery box; the negative electrode of the lithium battery box A is connected with the positive electrode of the lithium battery box B, and the lithium battery pack is formed by the same. And information is interacted between the lithium battery box A and the lithium battery box B through an intra-group communication line, so that the on-off of the main relay and the pre-charging relay is realized. In actual use, a plurality of lithium battery boxes can be connected in series according to the voltage requirement of a using system.
Optionally, in the lithium battery system provided in the embodiment of the present application, the lithium battery system includes: and connecting a plurality of lithium battery packs in parallel according to a preset capacity value, and carrying out data interaction among the lithium battery packs through a system communication line.
As shown in fig. 5, the positive electrodes of two lithium battery packs are connected in parallel to a lithium battery busbar to form a lithium battery system, and the lithium battery packs are in information interaction through a system communication line to control the lithium battery packs to be connected into the system. In actual use, a plurality of lithium battery boxes can be connected to the lithium battery bus in parallel according to the capacity requirement of the use system.
Fig. 6 is a flowchart of a control method of a lithium battery system according to an embodiment of the present application, as shown in fig. 6, the method includes the steps of:
Step S101, judging the connection state of a lithium battery pack in the current lithium battery system according to the data interaction condition of the lithium battery system.
In a UPS device using a lithium battery system, after the lithium battery system is connected to the system, the lithium battery system transmits data through a system communication line and an intra-group communication line, and whether a plurality of lithium battery groups are integrated in the lithium battery system is judged.
Step S102, if a plurality of lithium battery packs are connected in parallel, controlling the target lithium battery pack to be connected into the lithium battery system according to data interaction among the lithium battery packs.
For example, when three lithium battery packs (lithium battery pack 1, lithium battery pack 2 and lithium battery pack 3) are connected in parallel to the system, data information is interacted between the three lithium battery packs through a system communication line, and after the interaction of the data information, the lithium battery pack 1 is determined to be the target lithium battery pack, and then the lithium battery pack 1 is controlled to be connected to the lithium battery system.
And step S103, if a plurality of lithium battery boxes are connected in series in the target lithium battery pack, controlling the on-off of the target lithium battery boxes according to the data interaction in the plurality of lithium battery box packs.
For example, the target lithium battery pack is lithium battery pack 1, and 3 lithium battery boxes (lithium battery box a, lithium battery box B and lithium battery box C) are arranged in the lithium battery pack 1, and the three lithium battery boxes sequentially control the on-off of a main relay and a pre-charging relay of the lithium battery box a (corresponding to the target lithium battery box) through intra-pack communication interaction data.
Through the steps, the problems of series connection of the lithium battery boxes and parallel connection of the lithium battery packs are solved, the voltage and the capacity of the lithium battery system can be safely and orderly expanded, and the technical effect of expandability of the lithium battery system is achieved.
Optionally, in the method for controlling a lithium battery system provided in the embodiment of the present application, controlling on/off of a target lithium battery box according to data interaction in a plurality of lithium battery box groups includes: identifying a master lithium battery box and a slave lithium battery box through address information of each lithium battery box in the target lithium battery pack; starting self-checking from the lithium battery box, controlling the main relay of the lithium battery box to be closed when the self-checking from the lithium battery box has no fault, and sending a closing signal to the main lithium battery box; under the condition that the main lithium battery box receives a closing signal, starting self-checking; and if the self-inspection of the main lithium battery box is fault-free, controlling the main relay of the main lithium battery box to be closed.
For example, in a UPS product, the actual voltage requirement is 220 volts (V for short), the voltage of a single lithium battery box is 110V, and then one lithium battery pack needs to include two lithium battery boxes, as shown in fig. 5, one lithium battery pack includes two lithium battery boxes, and after one lithium battery pack is connected to the UPS system as a whole, the address of the lithium battery box a is allocated to be 01, the address of the lithium battery box 2 is allocated to be 02, and the lithium battery box a is identified as a master lithium battery box and the lithium battery box B is identified as a slave lithium battery through address information. The lithium battery box B starts self-checking, closes the main relay under the condition of no fault, and sends a closing signal to the lithium battery box A through an intra-group communication line; after the lithium battery box A receives the closing signal, the lithium battery box A starts self-checking, and after the self-checking is fault-free, the main relay of the lithium battery box A is closed.
Through the real-time interaction of the information between the lithium battery boxes, the on-off of the main relay of each lithium battery box can be accurately controlled, and the safety and the reliability of the system are ensured.
Optionally, in the method for controlling a lithium battery system provided in the embodiment of the present application, controlling on/off of a target lithium battery box according to data interaction in a plurality of lithium battery box groups includes: if the slave lithium battery box self-check has a fault, controlling the slave lithium battery box main relay and the pre-charging relay to be in a disconnected state, and sending a fault signal I to a target system where the main lithium battery box and the lithium battery system are located; if the main lithium battery box receives the first fault signal of the secondary lithium battery box or the self-detection of the main lithium battery box has faults, the main relay and the pre-charging relay of the main lithium battery box are controlled to be in the disconnection state, and the second fault signal is sent to a target system where the lithium battery system is located.
For example, in the actual use of the UPS product, if the lithium battery box B is self-checked and a fault is found, the control main relay and the pre-charging relay are both in an off state, and the fault signal is sent to the lithium battery box a through the intra-group communication line; and sending the first fault signal to the UPS system where the lithium battery system is located through a system data line. When the lithium battery box A receives the first fault signal or the self-detection of the lithium battery box A fails, the main relay and the pre-charging relay of the lithium battery box A are controlled to be in the disconnected state, and the second fault signal is sent to a target system where the lithium battery system is located through a system communication line.
When a certain lithium battery box fails, the lithium battery pack where the lithium battery box is positioned is in a disconnected state for the UPS system, so that the safety of the system and the normal use of other lithium battery packs are ensured.
Optionally, in the control method of a lithium battery system provided in the embodiment of the present application, according to data interaction between each lithium battery pack, controlling access of a target lithium battery pack to the lithium battery system includes: if the lithium battery bus is connected to the first lithium battery pack and is connected to the second lithium battery pack, controlling the first lithium battery pack to start charging, and when the voltage difference between the first lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold value, sending a target signal to the second lithium battery pack by the first lithium battery pack, wherein the voltage of the second lithium battery pack is higher than that of the first lithium battery pack; in the charging process of the first lithium battery pack, the main relay and the pre-charging relay of the second lithium battery pack are in an off state; and under the condition that the second lithium battery pack receives the target signal, controlling the main relay of the second lithium battery pack to be closed.
For example, in UPS products, the actual required capacity is 100 Ampere Hours (AH), and the capacity of a lithium battery pack connected in series with two lithium battery boxes is 50AH, so that two lithium battery packs need to be connected in parallel to form a lithium battery system. The lithium battery system shown in fig. 3 is two lithium battery packs connected to the lithium battery bus, wherein the left side is the first lithium battery pack, and the right side is the second lithium battery pack. If the first lithium battery pack is successfully incorporated into the system, the second lithium battery pack is newly incorporated into the lithium battery system, the voltage of the first lithium battery pack is 60V, and the voltage of the second lithium battery pack is 100V, then the main relay and the pre-charge relay of the second lithium battery pack are not closed. And the UPS system charges the first lithium battery pack until the voltage difference between the UPS system and the second lithium battery pack is smaller than the parallel voltage threshold, and the main relay of the second lithium battery pack is closed, so that the second lithium battery pack is successfully integrated into the lithium battery system.
When a new lithium battery pack is incorporated in the use process of the UPS product, the damage to the lithium battery caused by different voltages in the incorporation process is avoided through information interaction among the lithium battery packs.
Optionally, in the control method of a lithium battery system provided in the embodiment of the present application, according to data interaction between each lithium battery pack, controlling access of a target lithium battery pack to the lithium battery system includes: if the first lithium battery pack is connected into the lithium battery bus, and the second lithium battery pack is connected into the lithium battery bus, the pre-charging relay of the second lithium battery pack is controlled to be closed, and charging is started; when the voltage difference between the second lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold, the main relay of the second lithium battery pack is controlled to be closed, and the pre-charging relay is controlled to be opened, wherein the voltage of the second lithium battery pack is lower than that of the first lithium battery pack.
For example, as shown in fig. 3, two lithium battery packs are connected in parallel to a lithium battery bus, a first lithium battery pack is on the left, and a second lithium battery pack is on the right. If the first lithium battery pack is successfully integrated into the system, the second lithium battery pack is newly integrated into the lithium battery system, the voltage value of the first lithium battery pack is 110V, the voltage value of the second lithium battery pack is 60V, then the pre-charging relay of the second lithium battery pack is closed, the UPS system starts to charge the second lithium battery pack until the voltage difference between the second lithium battery pack and the first lithium battery pack is smaller than the connection voltage threshold, the main relay of the second lithium battery pack is closed, and the pre-charging relay is opened, so that the second lithium battery pack is successfully integrated into the lithium battery system.
When the lithium battery pack II with the voltage lower than that of the lithium battery pack I is combined in the use process of the UPS product, the charging of the lithium battery pack II is realized through the pre-charging relay, and the lithium battery pack is prevented from being damaged by overshoot.
Optionally, in the control method of a lithium battery system provided in the embodiment of the present application, according to data interaction between each lithium battery pack, controlling access of a target lithium battery pack to the lithium battery system includes: if the lithium battery busbar is not connected with the lithium battery packs, when a plurality of lithium battery packs are detected to be simultaneously connected with the lithium battery packs, the lithium battery packs interact data through a system communication line, the voltage values of the lithium battery packs are compared, and the lithium battery packs are sequentially connected with the lithium battery system according to the sequence from low voltage values to high voltage values.
For example, as shown in fig. 3, two lithium battery packs are connected in parallel to a lithium battery bus, a first lithium battery pack is on the left, and a second lithium battery pack is on the right. If the first lithium battery pack and the second lithium battery pack are simultaneously integrated into the lithium battery system, when the voltage of the first lithium battery pack is 60V and the voltage of the second lithium battery pack is 110V, the first lithium battery pack and the second lithium battery pack exchange voltage information through a system communication line, the first lithium battery pack is preferentially connected into the system, and after the first lithium battery pack is successfully connected into the system, the second lithium battery pack is connected into the lithium battery system.
Through the scheme, the information interaction among the lithium battery packs enables the lithium battery packs to be orderly connected in parallel to the system, so that the safety, stability and reliability of the system are ensured.
In summary, according to the control method of the lithium battery system provided by the embodiment of the application, a plurality of lithium battery boxes are connected in series according to the preset voltage to form a lithium battery pack, and a plurality of lithium battery packs are connected in parallel according to the preset capacity to form the lithium battery system. The serial connection between the lithium battery boxes is realized through the data interaction between the lithium battery boxes; through the data interaction between the lithium battery packs, the parallel connection between the lithium battery packs is realized, and the problem that the lithium battery system in the prior art is difficult to expand and cannot meet the requirements of UPS equipment is solved. Thereby realizing the technical effect of expandability of the lithium battery system.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
The embodiment of the application also provides a control device of the lithium battery system, and it is noted that the control device of the lithium battery system of the embodiment of the application can be used for executing the control method for the lithium battery system provided by the embodiment of the application. The following describes a control device of a lithium battery system provided in an embodiment of the present application.
Fig. 7 is a schematic view of a control device of a lithium battery system according to an embodiment of the present application. As shown in fig. 7, the apparatus includes: the device comprises: a judgment unit 10, a first control unit 20, and a second control unit 30.
The judging unit 10 is used for judging the connection state of the lithium battery pack in the current lithium battery system according to the data interaction condition of the lithium battery system;
the first control unit 20 is configured to control the target lithium battery pack to be connected to the lithium battery system according to data interaction between the lithium battery packs if there are a plurality of lithium battery packs connected in parallel;
and the second control unit 30 is configured to control on-off of the target lithium battery box according to data interaction in the plurality of lithium battery box groups if the plurality of lithium battery boxes are connected in series in the target lithium battery group.
In summary, in the control device of the lithium battery system according to the embodiment of the present application, the judging unit 10 judges the connection state of the lithium battery pack in the current lithium battery system according to the data interaction condition of the lithium battery system during the use process of the lithium battery system; when a plurality of lithium battery packs are connected in parallel, the first control unit 20 controls the target lithium battery pack to be connected into the lithium battery system according to data interaction among the lithium battery packs; when a plurality of lithium battery boxes are connected in series in the target lithium battery pack, the second control unit 30 controls the on-off of the target lithium battery boxes according to the data interaction in the plurality of lithium battery box packs, so that the problem that a lithium battery system in the prior art is difficult to expand and cannot meet the requirements of UPS equipment is solved. A plurality of lithium battery boxes are connected in series according to preset voltage to form a lithium battery pack, and a plurality of lithium battery packs are connected in parallel according to preset capacity to form a lithium battery system, so that the technical effect of expandability of the lithium battery system is achieved.
Optionally, in the control device of a lithium battery system provided in the embodiment of the present application, the second control unit 30 includes: the identification module is used for identifying the master lithium battery box and the slave lithium battery boxes through the address information of each lithium battery box in the target lithium battery pack; the first control module is used for controlling the main relay of the secondary lithium battery box to be closed if the secondary lithium battery box has no fault in self-detection, and sending a closing signal to the main lithium battery box; the self-checking module is used for starting self-checking under the condition that the main relay of the slave lithium battery box is closed when the main lithium battery box receives a signal from the slave lithium battery box; and the second control module is used for controlling the main relay of the main lithium battery box to be closed if the self-check of the main lithium battery box is fault-free.
Optionally, in the control device of a lithium battery system provided in the embodiment of the present application, the device further includes: the third control unit is used for controlling the main relay and the pre-charging relay of the secondary lithium battery box to be in a disconnected state if the secondary lithium battery box self-tests to have faults, and sending a fault signal I to the main lithium battery box; and the fourth control unit is used for controlling the main relay and the pre-charging relay of the main lithium battery box to be in a disconnected state and sending the fault signal II to a target system where the lithium battery system is located if the main lithium battery box receives the fault signal I of the auxiliary lithium battery box or the self-inspection of the main lithium battery box has faults.
Optionally, in the control device of a lithium battery system provided in the embodiment of the present application, the first control unit 20 includes: the third control module is used for controlling the lithium battery pack to be charged initially if the lithium battery bus is connected with the first lithium battery pack and is connected with the second lithium battery pack, and sending a target signal to the second lithium battery pack by the lithium battery pack when the voltage difference between the first lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold value, wherein the voltage of the second lithium battery pack is higher than that of the first lithium battery pack; in the charging process of the first lithium battery pack, the main relay and the pre-charging relay of the second lithium battery pack are in an off state; and the fourth control module is used for controlling the main relay of the second lithium battery pack to be closed under the condition that the second lithium battery pack receives the target signal.
Optionally, in the control device of a lithium battery system provided in the embodiment of the present application, the first control unit 20 further includes: the fifth control module is used for controlling the closing of the pre-charging relay of the second lithium battery pack to start charging if the first lithium battery pack is connected into the bus of the lithium battery pack and the second lithium battery pack is connected into the bus of the lithium battery pack; when the voltage difference between the second lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold, the main relay of the second lithium battery pack is controlled to be closed, and the pre-charging relay is controlled to be opened, wherein the voltage of the second lithium battery pack is lower than that of the first lithium battery pack.
Optionally, in the control device of a lithium battery system provided in the embodiment of the present application, the first control unit 20 further includes: and the sixth control module is used for comparing the voltage values of the lithium battery packs and sequentially connecting the lithium battery packs into the lithium battery system according to the sequence from low voltage value to high voltage value if the lithium battery packs are not connected into the lithium battery bus and when the simultaneous combination of the plurality of lithium battery packs into the lithium battery packs is detected.
According to the control device of the lithium battery system, the lithium battery packs are formed by connecting the lithium battery boxes in series according to the preset voltage, and the lithium battery systems are formed by connecting the lithium battery packs in parallel according to the preset capacity. The serial connection between the lithium battery boxes is realized through the data interaction between the lithium battery boxes; through the data interaction between the lithium battery packs, the parallel connection between the lithium battery packs is realized, and the problem that the lithium battery system in the prior art is difficult to expand and cannot meet the requirements of UPS equipment is solved. Thereby realizing the technical effect of expandability of the lithium battery system.
The control device of the lithium battery system includes a processor and a memory, the above-mentioned judging unit 10, the first control unit 20, the second control unit 30, and the like are stored as program units in the memory, and the processor executes the above-mentioned program units stored in the memory to realize the corresponding functions.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The core can be provided with one or more cores, and the capacity-expandable lithium battery system is realized by adjusting core parameters.
The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.
The embodiment of the invention provides a storage medium, on which a program is stored, which when executed by a processor, implements a method for controlling a lithium battery system.
The embodiment of the invention provides a processor, which is used for running a program, wherein the program runs to execute a control method of a lithium battery system.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes the following steps when executing the program: judging the connection state of a lithium battery pack in the current lithium battery system according to the data interaction condition of the lithium battery system; if a plurality of lithium battery packs are connected in parallel, controlling the target lithium battery pack to be connected into a lithium battery system according to data interaction among the lithium battery packs; if a plurality of lithium battery boxes are connected in series in the target lithium battery pack, controlling the on-off of the target lithium battery boxes according to the data interaction in the plurality of lithium battery box packs.
Optionally, controlling the on-off of the target lithium battery box according to the data interaction in the plurality of lithium battery box groups further includes: identifying a master lithium battery box and a slave lithium battery box through address information of each lithium battery box in the target lithium battery pack; if the self-inspection of the secondary lithium battery box is fault-free, the main relay of the secondary lithium battery box is controlled to be closed, and a closing signal is sent to the main lithium battery box; under the condition that the main lithium battery box receives a closing signal, starting self-checking; and if the self-inspection of the main lithium battery box is fault-free, controlling the main relay of the main lithium battery box to be closed.
Optionally, controlling the on-off of the target lithium battery box according to the data interaction in the plurality of lithium battery box groups further includes: if the self-check of the secondary lithium battery box has a fault, controlling the main relay and the pre-charging relay of the secondary lithium battery box to be in a disconnected state, and sending a fault signal I to the main lithium battery box; if the main lithium battery box receives the first fault signal of the secondary lithium battery box or the self-detection of the main lithium battery box has faults, the main relay and the pre-charging relay of the main lithium battery box are controlled to be in the disconnection state, and the second fault signal is sent to a target system where the lithium battery system is located.
Optionally, controlling the target lithium battery pack to access the lithium battery system according to the data interaction between the lithium battery packs further includes: if the lithium battery bus is connected to the first lithium battery pack and is connected to the second lithium battery pack, controlling the first lithium battery pack to start charging, and when the voltage difference between the first lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold value, sending a target signal to the second lithium battery pack by the first lithium battery pack, wherein the voltage of the second lithium battery pack is higher than that of the first lithium battery pack; in the charging process of the first lithium battery pack, the main relay and the pre-charging relay of the second lithium battery pack are in an off state; and under the condition that the second lithium battery pack receives the target signal, controlling the main relay of the second lithium battery pack to be closed.
Optionally, controlling the target lithium battery pack to access the lithium battery system according to the data interaction between the lithium battery packs further includes: if the first lithium battery pack is connected into the lithium battery bus, and the second lithium battery pack is connected into the lithium battery bus, the pre-charging relay of the second lithium battery pack is controlled to be closed, and charging is started; when the voltage difference between the second lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold, the main relay of the second lithium battery pack is controlled to be closed, and the pre-charging relay is controlled to be opened, wherein the voltage of the second lithium battery pack is lower than that of the first lithium battery pack.
Optionally, controlling the target lithium battery pack to access the lithium battery system according to the data interaction between the lithium battery packs further includes: if the lithium battery busbar is not connected with the lithium battery packs, when a plurality of lithium battery packs are detected to be simultaneously connected with the lithium battery packs, the lithium battery packs interact data through a system communication line, the voltage values of the lithium battery packs are compared, and the lithium battery packs are sequentially connected with the lithium battery system according to the sequence from low voltage values to high voltage values. The device herein may be a server, PC, PAD, cell phone, etc.
The present application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with the method steps of: judging the connection state of a lithium battery pack in the current lithium battery system according to the data interaction condition of the lithium battery system; if a plurality of lithium battery packs are connected in parallel, controlling the target lithium battery pack to be connected into a lithium battery system according to data interaction among the lithium battery packs; if a plurality of lithium battery boxes are connected in series in the target lithium battery pack, controlling the on-off of the target lithium battery boxes according to the data interaction in the plurality of lithium battery box packs.
Optionally, controlling the on-off of the target lithium battery box according to the data interaction in the plurality of lithium battery box groups further includes: identifying a master lithium battery box and a slave lithium battery box through address information of each lithium battery box in the target lithium battery pack; if the self-inspection of the secondary lithium battery box is fault-free, the main relay of the secondary lithium battery box is controlled to be closed, and a closing signal is sent to the main lithium battery box; under the condition that the main lithium battery box receives a closing signal, starting self-checking; and if the self-inspection of the main lithium battery box is fault-free, controlling the main relay of the main lithium battery box to be closed.
Optionally, controlling the on-off of the target lithium battery box according to the data interaction in the plurality of lithium battery box groups further includes: if the self-check of the secondary lithium battery box has a fault, controlling the main relay and the pre-charging relay of the secondary lithium battery box to be in a disconnected state, and sending a fault signal I to the main lithium battery box; if the main lithium battery box receives the first fault signal of the secondary lithium battery box or the self-detection of the main lithium battery box has faults, the main relay and the pre-charging relay of the main lithium battery box are controlled to be in the disconnection state, and the second fault signal is sent to a target system where the lithium battery system is located.
Optionally, controlling the target lithium battery pack to access the lithium battery system according to the data interaction between the lithium battery packs further includes: if the lithium battery bus is connected to the first lithium battery pack and is connected to the second lithium battery pack, controlling the first lithium battery pack to start charging, and when the voltage difference between the first lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold value, sending a target signal to the second lithium battery pack by the first lithium battery pack, wherein the voltage of the second lithium battery pack is higher than that of the first lithium battery pack; in the charging process of the first lithium battery pack, the main relay and the pre-charging relay of the second lithium battery pack are in an off state; and under the condition that the second lithium battery pack receives the target signal, controlling the main relay of the second lithium battery pack to be closed.
Optionally, controlling the target lithium battery pack to access the lithium battery system according to the data interaction between the lithium battery packs further includes: if the first lithium battery pack is connected into the lithium battery bus, and the second lithium battery pack is connected into the lithium battery bus, the pre-charging relay of the second lithium battery pack is controlled to be closed, and charging is started; when the voltage difference between the second lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold, the main relay of the second lithium battery pack is controlled to be closed, and the pre-charging relay is controlled to be opened, wherein the voltage of the second lithium battery pack is lower than that of the first lithium battery pack.
Optionally, controlling the target lithium battery pack to access the lithium battery system according to the data interaction between the lithium battery packs further includes: if the lithium battery busbar is not connected with the lithium battery packs, when a plurality of lithium battery packs are detected to be simultaneously connected with the lithium battery packs, the lithium battery packs interact data through a system communication line, the voltage values of the lithium battery packs are compared, and the lithium battery packs are sequentially connected with the lithium battery system according to the sequence from low voltage values to high voltage values. It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (12)
1. A lithium battery system, comprising:
the lithium battery pack comprises a plurality of lithium battery packs, wherein each lithium battery pack is formed by connecting a plurality of lithium battery boxes in series;
the lithium battery box comprises a lithium battery, a main relay, a pre-charging relay and a pre-charging resistor;
the second end of the main relay is connected with the anode of the lithium battery, and charge and discharge of the lithium battery are controlled through the main relay;
the first end of the pre-charging relay is connected with the first end of the main relay, the second end of the pre-charging relay is connected with the first end of the pre-charging resistor, the second end of the pre-charging resistor is connected with the positive electrode of the lithium battery, and the pre-charging of the lithium battery is controlled through the pre-charging relay.
2. The system of claim 1, wherein the lithium battery pack comprises:
connecting a plurality of lithium battery boxes in series according to a preset voltage value, and carrying out data interaction among the lithium battery boxes through intra-group communication lines;
when the lithium battery pack is connected to the lithium battery bus, the lithium battery box with the anode connected with the lithium battery bus is a main lithium battery box, and the rest lithium battery boxes are secondary lithium battery boxes.
3. The system of claim 2, wherein the lithium battery system comprises:
And connecting a plurality of lithium battery packs in parallel according to a preset capacity value, and carrying out data interaction among the lithium battery packs through a system communication line.
4. A control method of a lithium battery system, characterized in that the control method is applied to the lithium battery system according to any one of claims 1 to 3, comprising:
judging the connection state of a lithium battery pack in the lithium battery system at present according to the data interaction condition of the lithium battery system;
if a plurality of lithium battery packs are connected in parallel, controlling the target lithium battery pack to be connected into the lithium battery system according to data interaction among the lithium battery packs;
and if a plurality of lithium battery boxes are connected in series in the target lithium battery pack, controlling the on-off of the target lithium battery boxes according to the data interaction in the plurality of lithium battery box packs.
5. The method of claim 4, wherein controlling the opening and closing of the target lithium battery box according to the data interaction in the plurality of lithium battery box groups comprises:
identifying a master lithium battery box and a slave lithium battery box through address information of each lithium battery box in the target lithium battery pack;
if the self-inspection of the secondary lithium battery box is free of faults, the main relay of the secondary lithium battery box is controlled to be closed, and a closing signal is sent to the main lithium battery box;
Under the condition that the main lithium battery box receives the closing signal, starting self-checking;
and if the self-check of the main lithium battery box is fault-free, controlling the main relay of the main lithium battery box to be closed.
6. The method according to claim 5, characterized in that the method comprises:
if the self-inspection of the secondary lithium battery box has faults, controlling a main relay and a pre-charging relay of the secondary lithium battery box to be in a disconnected state, and sending a fault signal I to the main lithium battery box;
if the main lithium battery box receives the first fault signal of the auxiliary lithium battery box or the self-detection of the main lithium battery box has faults, the main relay and the pre-charging relay of the main lithium battery box are controlled to be in the disconnected state, and the second fault signal is sent to a target system where the lithium battery system is located.
7. The method of claim 4, controlling access of the target lithium battery pack to the lithium battery system based on data interactions between the respective lithium battery packs, comprising:
if a lithium battery bus is connected to a first lithium battery pack and is integrated with a second lithium battery pack, controlling the first lithium battery pack to start charging, and when the voltage difference between the first lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold value, sending a target signal to the second lithium battery pack by the first lithium battery pack, wherein the voltage of the second lithium battery pack is higher than that of the first lithium battery pack; in the charging process of the first lithium battery pack, both a main relay and a pre-charging relay of the second lithium battery pack are in an off state;
And under the condition that the second lithium battery pack receives the target signal, controlling the main relay of the second lithium battery pack to be closed.
8. The method of claim 4, controlling access of the target lithium battery pack to the lithium battery system based on data interactions between the respective lithium battery packs, comprising:
if the first lithium battery pack is connected into the lithium battery bus, and the second lithium battery pack is connected into the lithium battery bus, controlling a pre-charging relay of the second lithium battery pack to be closed, and starting charging; when the voltage difference between the second lithium battery pack and the second lithium battery pack is smaller than a preset voltage threshold, the main relay of the second lithium battery pack is controlled to be closed, and the pre-charging relay is controlled to be opened, wherein the voltage of the second lithium battery pack is lower than that of the first lithium battery pack.
9. The method of claim 4, controlling access of a target lithium battery pack to the lithium battery system based on data interactions between individual lithium battery packs, comprising:
if the lithium battery busbar is not connected with the lithium battery packs, when a plurality of lithium battery packs are detected to be simultaneously connected with the lithium battery packs, the lithium battery packs interact data through a system communication line, voltage values of the lithium battery packs are compared, and the lithium battery packs are sequentially connected with the lithium battery system according to the sequence from low voltage values to high voltage values.
10. A control device of a lithium battery system, characterized in that the control device is applied to the lithium battery system according to any one of claims 1 to 3, the device comprising:
the judging unit is used for judging the connection state of the lithium battery pack in the lithium battery system according to the data interaction condition of the lithium battery system;
the first control unit is used for controlling the target lithium battery pack to be connected into the lithium battery system according to data interaction among the lithium battery packs if a plurality of lithium battery packs are connected in parallel;
and the second control unit is used for controlling the on-off of the target lithium battery boxes according to the data interaction in the plurality of lithium battery boxes if the plurality of lithium battery boxes are connected in series in the target lithium battery pack.
11. A computer-readable storage medium, characterized in that the storage medium includes a stored program, wherein the program performs the control method of the lithium battery system according to claim 4.
12. A processor for running a program, wherein the program, when run, performs the control method of the lithium battery system according to claim 4.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111236365.0A CN116014829A (en) | 2021-10-22 | 2021-10-22 | Lithium battery system, control method and device, storage medium and processor |
| PCT/CN2022/076589 WO2023065574A1 (en) | 2021-10-22 | 2022-02-17 | Lithium battery system, control method and apparatus, and storage medium and processor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111236365.0A CN116014829A (en) | 2021-10-22 | 2021-10-22 | Lithium battery system, control method and device, storage medium and processor |
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| KR102044737B1 (en) * | 2012-08-21 | 2019-11-15 | 에스케이이노베이션 주식회사 | Relay control system and control method |
| CN111030244A (en) * | 2019-12-28 | 2020-04-17 | 广州宝狮新能源有限公司 | Household energy storage inverter and lithium battery parallel operation system |
| CN110890776A (en) * | 2019-12-28 | 2020-03-17 | 广州宝狮新能源有限公司 | Three-level soft parallel UPS module lithium battery system |
| CN110957799A (en) * | 2019-12-28 | 2020-04-03 | 广州宝狮新能源有限公司 | UPS and lithium battery parallel operation system |
| US11228185B2 (en) * | 2020-04-09 | 2022-01-18 | Saft America, Inc. | Modular-scalable decentralized high voltage battery system |
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