System and method for controlling operation mode of battery pack

Abstract

The invention provides a battery pack operation mode control system and method. In the system, a control unit is respectively connected with a communication power supply screen, a battery unit and an embedded battery pack operation unit; one end of the embedded battery pack operation unit is respectively connected with a communication power supply screen and a direct current load through a busbar; the other end is connected with the battery unit; wherein the voltage information of the busbar and the battery information of the battery unit are obtained through the control unit, and an operation mode instruction is sent to the embedded battery pack operation unit, so that the battery unit and the communication power supply screen operate according to a mode corresponding to the operation mode instruction. According to the invention, the operation mode of the battery pack and the communication power supply screen in the battery unit is changed according to the operation mode instruction, so that the battery pack and the busbar operate in the modes of direct connection floating charge, isolated follow current and the like. According to the system, through intelligent control and optimal adjustment, the service life of the battery pack is prolonged while the efficient and stable operation of the power supply system is ensured, and the manual intervention and maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy management, and particularly to a control system and method for the operation mode of a battery pack. Background Art

[0002] In modern communication power supply systems, the battery pack serves as an important thermal standby power source, mainly used to ensure the normal operation of the system in the event of an interruption of the AC power supply and to ensure that communication equipment provides services without interruption. Especially in the case of a power outage in the city power grid or a failure of the power generation equipment to supply power in a timely manner, the battery pack can smoothly transition to the standby power mode by immediately providing DC electrical energy, greatly improving the reliability and safety of the system. However, in the current communication power supply system, with the continuous changes in the capacity and service life of the battery pack, how to effectively manage and maintain the battery pack has become an urgent problem to be solved.

[0003] Currently, for battery packs, manual charge and discharge management is inefficient and error-prone, and it is impossible to monitor the status of the battery pack in real time. The remote capacity verification technology detects through a dummy load simulation, but the generated heat and uncontrollable charging current may cause potential safety hazards and affect the battery life.

[0004] Therefore, reducing the workload of manual operation and maintenance, ensuring the stable and efficient operation of the battery pack, and extending the service life of the battery pack are urgent problems to be solved at present. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a control system and method for the operation mode of a battery pack to achieve the purpose of reducing the workload of manual operation and maintenance and effectively managing and maintaining the battery pack.

[0006] To achieve the above purpose, embodiments of the present invention provide the following technical solutions:

[0007] The first aspect of the present invention discloses a control system for the operation mode of a battery pack, and the system includes: a control unit, a communication power supply panel, a DC load, a battery unit, and an embedded battery pack operation mode unit;

[0008] The control unit is respectively connected to the communication power supply panel, the battery unit, and the embedded battery pack operation mode unit; one end of the embedded battery pack operation mode unit is respectively connected to the communication power supply panel and the DC load through a busbar; the other end of the embedded battery pack operation mode unit is connected to the battery unit;

[0009] Wherein, the voltage information of the busbar and the battery information of the battery unit are obtained through the control unit, and an operation mode instruction is sent to the embedded battery pack operation mode unit, so that the battery unit and the communication power supply panel operate according to the mode corresponding to the operation mode instruction.

[0010] Preferably, the battery unit includes: a battery acquisition module and a battery pack;

[0011] One end of the battery acquisition module is connected to the battery pack; the other end of the battery acquisition module is connected to the control unit;

[0012] The battery pack is connected to the embedded battery pack operation unit;

[0013] The battery acquisition module is configured to collect battery information of the battery pack and send the battery information to the control unit.

[0014] Preferably, the communication power supply screen includes a plurality of AC-DC converters;

[0015] Each of the AC-DC converters is connected to the busbar;

[0016] Each of the AC-DC converters is configured to convert alternating current into direct current and deliver the direct current to the busbar, and supply power to the DC load or the battery unit through the busbar.

[0017] Preferably, the embedded battery pack operation unit includes a relay, an isolation freewheeling module, and a bidirectional DC-DC converter;

[0018] The bidirectional DC-DC converter is connected to a first common end connected to the relay and the isolation freewheeling module through a first switch;

[0019] The first common end where the relay and the isolation freewheeling module are connected is connected to the communication power supply screen through the busbar;

[0020] The second common end where the relay and the isolation freewheeling module are connected is connected to the battery unit;

[0021] The first common end where the relay and the isolation freewheeling module are connected is connected to the control unit;

[0022] The bidirectional DC-DC converter is configured to boost the output voltage of the battery unit when the operation mode instruction is a battery pack discharge operation mode instruction or a battery pack capacity verification operation mode instruction, so that the battery unit supplies power to the DC load through the busbar; and is also configured to boost the voltage of the busbar to the equalizing charge voltage when the operation mode instruction is a battery pack equalizing charge operation mode instruction, so that the communication power supply screen charges the battery unit through the busbar;

[0023] The relay is configured to connect the battery unit and the busbar when the operation mode instruction is a floating charge operation mode instruction; and is also configured to disconnect the battery unit and the busbar when the operation mode instruction is not a floating charge operation mode instruction;

[0024] The isolation freewheeling module is used to connect the battery unit and the busbar when the operation mode instruction is an isolation operation mode instruction, a battery pack discharge operation mode instruction, a battery pack capacity verification operation mode instruction, or a battery pack equalizing charge operation mode instruction; it is also used to disconnect the battery unit and the busbar when the operation mode instruction is a floating charge operation mode instruction.

[0025] Preferably, the isolation freewheeling module includes: an insulated gate bipolar transistor (IGBT) device, a metal-oxide-semiconductor (MOS) device, and a second switch;

[0026] The cathode of the MOS device is connected to one end of the second switch; the other end of the second switch is connected to the busbar; the anode of the MOS device is connected to the battery unit;

[0027] One end of the IGBT device is connected to the busbar; the other end of the IGBT device is connected to the battery unit;

[0028] When the operation mode instruction is an isolation operation mode instruction, a battery pack discharge operation mode instruction, a battery pack capacity verification operation mode instruction, or a battery pack equalizing charge operation mode instruction, the second switch is closed; when the operation mode instruction is a floating charge operation mode instruction, the second switch is opened.

[0029] Preferably, the insulated gate bipolar transistor (IGBT) device is a self-locking switch;

[0030] The metal-oxide-semiconductor (MOS) device is a diode.

[0031] A second aspect of the present invention discloses a control method for the operation mode of a battery pack, which is applied to the control system for the operation mode of a battery pack disclosed in the first aspect of the present invention. The method includes:

[0032] Using a control unit to control the communication power supply panel to supply power to a DC load;

[0033] Obtaining the voltage information of the busbar and the battery information of the battery unit through the control unit, and sending an operation mode instruction to the embedded battery pack operation mode unit according to the voltage information and the battery information;

[0034] Using the embedded battery pack operation mode unit to execute the operation mode instruction to control the operation modes of the battery unit and the communication power supply panel.

[0035] Preferably, the step of using the embedded battery pack operation mode unit to execute the operation mode instruction to control the operation modes of the battery unit and the communication power supply panel includes:

[0036] When the operation mode instruction is the floating charge operation mode instruction, close the relay in the embedded battery pack operation unit to connect the battery unit to the busbar, so that the communication power supply screen charges the battery unit;

[0037] When the operation mode instruction is the isolation operation mode instruction, disconnect the relay in the embedded battery pack operation unit to disconnect the connection between the battery unit and the busbar;

[0038] When the operation mode instruction is the battery pack discharge operation mode instruction, use the bidirectional DC-DC converter in the embedded battery pack operation unit to increase the output voltage of the battery pack in the battery unit, so as to supply power to the DC load through the battery pack;

[0039] When the operation mode instruction is the battery pack capacity verification operation mode instruction, use the bidirectional DC-DC converter in the embedded battery pack operation unit to adjust the output voltage of the battery pack, so that the battery pack discharges the DC load based on a preset current;

[0040] When the operation mode instruction is the battery pack equalizing charge operation mode instruction, boost the voltage of the busbar through the bidirectional DC-DC converter in the embedded battery pack operation unit, so as to charge the battery unit by using the communication power supply screen.

[0041] Preferably, when the operation mode instruction is the battery pack equalizing charge operation mode instruction, boosting the voltage of the busbar through the bidirectional DC-DC converter in the embedded battery pack operation unit to charge the battery unit by using the communication power supply screen includes:

[0042] When the operation mode instruction is the battery pack equalizing charge operation mode instruction, use the bidirectional DC-DC converter in the embedded battery pack operation unit to boost the voltage of the busbar to the equalizing charge voltage and keep the charge amount at a preset stable value;

[0043] Disconnect the relay and the isolation freewheeling module in the embedded battery pack operation unit;

[0044] Use the communication power supply screen to charge the battery pack in the battery unit according to the equalizing charge voltage and the preset stable value.

[0045] Preferably, the method further includes:

[0046] When it is detected by the control unit that the communication power supply screen is in a power-off state, use the control unit to control the relay and the isolation freewheeling module in the embedded battery pack operation unit to close, so as to connect the battery pack in the battery unit and the busbar;

[0047] Use the battery pack to supply continuous current power to the busbar.

[0048] Based on the control system and method for a battery pack operation mode provided in the above embodiments of the present invention, in the system, the control unit is respectively connected to the communication power supply panel, the battery unit, and the embedded battery pack operation unit; one end of the embedded battery pack operation unit is respectively connected to the communication power supply panel and the DC load through a busbar; the other end is connected to the battery unit; wherein, the control unit obtains the voltage information of the busbar and the battery information of the battery unit, and sends an operation mode instruction to the embedded battery pack operation unit, so that the battery unit and the communication power supply panel operate according to the mode corresponding to the operation mode instruction. In the present invention, according to the operation mode instruction, the battery pack in the battery unit and the communication power supply panel change the operation mode, so that the battery pack and the busbar operate in a direct connection floating charge, isolation continuous current and other modes. Through intelligent control and optimized adjustment, the system ensures the efficient and stable operation of the power supply system, extends the service life of the battery pack, and reduces the manual intervention and maintenance cost. Description of the Drawings

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0050] Figure 1 The first structure diagram of a control system for a battery pack operation mode provided by an embodiment of the present invention;

[0051] Figure 2 The second structure diagram of a control system for a battery pack operation mode provided by an embodiment of the present invention;

[0052] Figure 3 The third structure diagram of a control system for a battery pack operation mode provided by an embodiment of the present invention;

[0053] Figure 4 The fourth structure diagram of a control system for a battery pack operation mode provided by an embodiment of the present invention;

[0054] Figure 5 The fifth structure diagram of a control system for a battery pack operation mode provided by an embodiment of the present invention;

[0055] Figure 6 The external structure diagram of the embedded battery pack operation unit provided by an embodiment of the present invention;

[0056] Figure 7 The layout diagram of the embedded battery pack operation unit provided by an embodiment of the present invention;

[0057] Figure 8 A flowchart of a control method for a battery pack operation mode provided by an embodiment of the present invention. Detailed implementation manners

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0059] In this application, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0060] As can be seen from the background technology, currently, the maintenance of the battery pack mainly relies on manual work. However, the efficiency of manual charge and discharge management is low and prone to errors, and the state of the battery pack cannot be monitored in real time. The remote capacity verification technology detects through a dummy load simulation, but the generated heat and uncontrollable charging current may cause potential safety hazards and affect the battery life.

[0061] Therefore, an embodiment of the present invention provides a control system and method for a battery pack operation mode. In the system, a control unit is respectively connected to a communication power supply panel, a battery unit and an embedded battery pack operation unit; one end of the embedded battery pack operation unit is respectively connected to the communication power supply panel and a DC load through a busbar; the other end is connected to the battery unit; wherein, the voltage information of the busbar and the battery information of the battery unit are obtained through the control unit, and an operation mode instruction is sent to the embedded battery pack operation unit, so that the battery unit and the communication power supply panel operate according to the operation mode instruction corresponding thereto. In the present invention, according to the operation mode instruction, the battery pack in the battery unit and the communication power supply panel change the operation mode, so that the battery pack and the busbar operate in a direct connection floating charge, isolation freewheeling and other modes. The system prolongs the service life of the battery pack and reduces the manual intervention and maintenance cost while ensuring the efficient and stable operation of the power supply system through intelligent control and optimized regulation.

[0062] See Figure 1, showing the first structure diagram of a control system for a battery pack operation mode provided by an embodiment of the present invention. The control system includes: a control unit 11, a communication power supply panel 12, a DC load 13, a battery unit 14, and an embedded battery pack operation unit 15.

[0063] Specifically, the control unit 11 is respectively connected to the communication power supply panel 12, the battery unit 14, and the embedded battery pack operation unit 15; one end of the embedded battery pack operation unit 15 is respectively connected to the communication power supply panel 12 and the DC load 13 through a busbar (i.e., Figure 1 the "DC busbar" in the figure); the other end of the embedded battery pack operation unit 15 is connected to the battery unit 14.

[0064] It should be noted that the control unit 11 is used to control the communication power supply panel 12 to supply power to the DC load 13 through the busbar. The control unit 11 is also used to obtain the voltage information of the busbar and the battery information of the battery unit 14, and send an operation mode instruction to the embedded battery pack operation unit 15 according to the voltage information and the battery information.

[0065] Among them, the battery information includes but is not limited to battery voltage, battery internal resistance, and battery terminal temperature and other information.

[0066] It should be noted that the embedded battery pack operation unit 15 is used to control the battery unit 14 and the communication power supply panel 12 to operate according to the operation mode corresponding to the operation mode instruction.

[0067] Specifically, the control system for the battery pack operation mode is divided into two types of operation modes: normal operation mode and battery test operation mode. Among them, the normal operation mode includes floating charge operation mode, isolation operation mode, and battery pack equalizing charge operation mode. The battery test operation mode includes battery pack discharge operation mode and battery pack capacity verification operation mode.

[0068] In the floating charge operation mode, the communication power supply panel 12 provides a 54V DC power supply to the busbar, and the DC load 13 is connected to the busbar; the battery unit 14 is directly connected to the busbar; the static terminal voltage of the battery pack in the battery unit 14 is 50V. The communication power supply panel 12 supplies power to the DC load 13 and replenishes the charge of the battery pack in the battery unit 14 at the same time.

[0069] Under normal conditions, the voltage of the busbar is 54V, and the voltage of the battery unit 14 is 51V. When the control unit 11 obtains that the voltage information of the busbar is lower than 51V, it sends an isolation operation mode instruction to the embedded battery pack operation unit 15 to disconnect the direct connection between the battery unit 14 and the busbar. At this time, the battery unit 14 supplies power to the busbar through the embedded battery pack operation unit 15. Thus, the damage to the battery pack life caused by the long-term floating charge operation of the battery pack in the battery unit 14 is solved.

[0070] In the battery pack discharge operation mode, the output voltage of the battery unit 14 is increased to 55V by embedding the battery pack operation unit 15, so that the battery unit 14 discharges to the DC load 13, thereby verifying the actual support duration of the battery pack in the battery unit 14 under the condition of AC power loss.

[0071] In the battery pack capacity verification operation mode, the output voltage of the battery pack in the battery unit 14 is adjusted by embedding the battery pack operation unit 15, so that the battery pack discharges to the DC load 13 at a 10C current, thereby verifying the battery pack capacity according to the standard specification.

[0072] In the battery pack equalizing charge operation mode, the battery unit 14 is connected to the hot standby operation by embedding the battery pack operation unit 15. The embedded battery pack operation unit 15 raises the voltage of the busbar to the equalizing charge voltage to perform equalizing charge on the battery unit 14 using the busbar.

[0073] It should be noted that only by charging the battery unit 14 with the equalizing charge voltage can the battery pack in the battery unit 14 be charged to the full charge state.

[0074] It can be understood that in the battery pack equalizing charge operation mode, if the voltage of the busbar drops instantaneously, the battery unit 14 will perform continuous current on the busbar through the embedded battery pack operation unit 15 within 2ms.

[0075] It should be particularly noted that all the above-mentioned numbers are only examples, and the specific situation may be different, and the actual situation is not restricted here.

[0076] The following combines Figures 2 to 4 to elaborate in detail on the structure of the control system for the battery charging and discharging.

[0077] Refer to Figure 2 , the battery unit 14 includes: a battery acquisition module and a battery pack.

[0078] Specifically, one end of the battery acquisition module is connected to the battery pack; the other end of the battery acquisition module is connected to the control unit; the battery pack is connected to the embedded battery pack operation unit.

[0079] It should be noted that the battery acquisition module is used to acquire the battery information of the battery pack and send the battery information to the control unit. The control unit issues operation mode instructions (such as floating charge operation mode instructions, isolation operation mode instructions, battery pack discharge operation mode instructions, battery pack capacity verification operation mode instructions, or battery pack equalizing charge operation mode instructions) to the embedded battery pack operation unit in combination with the pre-set battery pack self-maintenance strategy, the voltage information of the busbar, and the battery information.

[0080] It can be understood that the self-maintenance strategy of the battery pack can be set to discharge once a month, for example. The specific method is to conduct a discharge test according to the discharge durations of 1 hour, 2 hours, and 4 hours, and at the same time conduct a complete discharge cycle once a quarter.

[0081] It should be noted that the normal service life of a commonly used lead-acid battery is usually 800 charge-discharge cycles. If a charge-discharge test is conducted once a month, it is 12 times a year and 120 times in 10 years. Through the control system proposed in the embodiments of the present invention, it helps to achieve the self-maintenance of the battery pack, can significantly improve the performance of the battery pack, and conforms to the electrochemical characteristics of the lead-acid battery electrolyte.

[0082] As Figure 2 shown, the communication power supply panel 12 includes a plurality of AC-DC converters.

[0083] Specifically, one end of each AC-DC converter is connected to the alternating current, and the other end is connected to the busbar.

[0084] It should be noted that each AC-DC converter is used to convert the alternating current into direct current and deliver the direct current to the busbar, and supply power to the DC load or the battery unit through the busbar.

[0085] Referring to Figure 3 , the embedded battery pack operation unit includes a relay (such as Figure 3 K11 in

[0086] ), an isolation freewheeling module, and a bidirectional DC-DC converter. Figure 3 Specifically, the bidirectional DC-DC converter is connected to the first common end connected to the relay and the isolation freewheeling module through a first switch (such as

[0087] K12 in

[0088] ). The first common end connected to the relay and the isolation freewheeling module is connected to the communication power supply panel through the busbar. The second common end connected to the relay and the isolation freewheeling module is connected to the battery unit; the first common end connected to the relay and the isolation freewheeling module is connected to the control unit.

[0089] When the bidirectional DC-DC converter boosts the output voltage of the battery pack in the battery unit to above 54V (such as 55V), the battery pack can supply power to the DC load through the busbar for a preset duration to complete discharging.

[0090] It should be specifically noted that the isolation freewheeling module is used for the single-battery operation mode of the dual-power system.

[0091] Specifically, the bidirectional DC-DC converter is also used to boost the voltage of the busbar to the equalizing charge voltage when the operation mode instruction is the equalizing charge operation mode instruction of the battery pack, so that the communication power supply screen can charge the battery unit through the busbar.

[0092] That is to say, through the bidirectional DC-DC converter, the voltage of the busbar is boosted from 54V to the equalizing charge voltage of 56.7V; and the current is stabilized at about 10C (to protect the battery pack from being burned out) to charge the battery pack.

[0093] Specifically, the relay is used to connect the battery unit and the busbar when the operation mode instruction is the floating charge operation mode instruction; it is also used to disconnect the battery unit and the busbar when the operation mode instruction is not the floating charge operation mode instruction (that is, Figure 3 K11 in

[0094] is pulled open and not closed).

[0095] See Figure 4 for details. The isolation freewheeling module includes: an insulated gate bipolar transistor IGBT device, a metal-oxide-semiconductor MOS device, and a second switch.

[0096] Specifically, the cathode of the MOS device is connected to one end of the second switch (such as Figure 4 K13 in

[0097] ); the other end of the second switch is connected to the busbar; the anode of the MOS device is connected to the battery unit. One end of the IGBT device is connected to the busbar; the other end of the IGBT device is connected to the battery unit.

[0098] In some specific embodiments, the insulated gate bipolar transistor IGBT device is a self-locking switch; the metal-oxide-semiconductor MOS device is a diode.

[0099] It should be noted that due to the inherent characteristics of power electronic devices, the overload capacity of the DC / DC conversion device is usually limited (generally not exceeding 1.2 times the rated value). The overload impact of the communication load or the feeder short-circuit fault may cause the current-limiting protection of the DC / DC device to start, resulting in a drop in the -48V bus voltage. And in this case, the circuit breaker may not be able to operate reliably. When the output voltage drops below 43V, the communication power supply system will experience an overall loss of voltage. To solve this problem, the isolation freewheeling module can provide a maximum of 1000A of current freewheeling, and the freewheeling delay is less than 1 millisecond, which can effectively ensure the stable operation of the communication power supply system.

[0100] Specifically, as shown in Figure 4 , the single-arm diode and the normally open contact are used to cope with the sudden AC power loss during the self-check of the control system. At the same time, the isolation freewheeling module can provide freewheeling protection between the battery pack and the busbar, and the freewheeling speed is within 1 millisecond.

[0101] It can be understood that the isolation freewheeling module realizes the bidirectional isolation between the power busbar and the battery pack, meeting the need for independent charging of the battery pack. It also solves the time-delay problem when the relay contacts open and close, enabling the device to achieve freewheeling within 1 millisecond, ensuring the uninterrupted and reliable operation of the communication device. It further realizes the micro-current opening and closing function of the relay, effectively extending the service life of the relay.

[0102] In the actual application process, when the battery pack cannot meet the normal capacity after the communication load increases, it can be achieved through the method shown in Figure 5 . Multiple embedded battery pack operation units are connected to battery units (which can be battery units of different manufacturers and models) to expand the capacity of the communication power supply.

[0103] In the embodiment of the present invention, through intelligent control and automated management, the system can reduce the manual operation and maintenance workload, improve the operation efficiency and stability of the battery pack. The control unit automatically adjusts the charging and discharging process according to the real-time state of the battery unit, avoiding overcharging or over-discharging, and extending the service life of the battery pack. The system can also flexibly adjust the energy transmission, reduce energy waste, improve the overall energy utilization efficiency, thereby reducing the operation cost. At the same time, the system can monitor and optimize the working state of each part in real time, enhancing the maintainability of the system, ensuring long-term stable operation, and providing significant economic and technical advantages.

[0104] Referring to Figure 6 , it shows the external structure schematic diagram of the embedded battery pack operation unit provided by the embodiment of the present invention.

[0105] As shown in Figure 6As shown in the figure, the embedded battery pack operation unit includes: a plurality of bidirectional DC / DC units (i.e., bidirectional DC / DC converters), a main control unit (i.e., a control unit), and an isolation freewheeling unit (i.e., an isolation freewheeling module).

[0106] It should be noted that the main control unit (i.e., the control unit) specifically provides a manual operation panel for maintenance personnel to perform manual operations.

[0107] It can be understood that integrating the embedded battery pack operation unit into the Figure 6 structure shown in the figure makes the embedded battery pack operation unit more convenient for expansion and update, and at the same time convenient for testing and debugging. Thereby saving development and operation and maintenance costs and enhancing overall security.

[0108] See Figure 7 , which shows the layout schematic diagram of the embedded battery pack operation unit provided by the embodiment of the present invention. The embedded battery pack operation unit can be installed by drilling holes at the top of the cabinet, which is beneficial to saving space and facilitating the transformation of old stations. The embedded battery pack operation unit can also be installed inside the cabinet, which makes the cabinet style unified and personnel operation more convenient.

[0109] See Figure 8 , which shows the flowchart of a control method for a battery pack operation mode provided by the embodiment of the present invention. This control method is applicable to the control system for a battery pack operation mode provided by the above embodiment of the present invention. The method includes:

[0110] Step S801: Use the control unit to control the communication power supply panel to supply power to the DC load.

[0111] In the specific process of implementing step S801, the communication power supply panel is regulated by the control unit to provide power supply for the DC load.

[0112] Step S802: Obtain the voltage information of the busbar and the battery information of the battery unit through the control unit, and send an operation mode instruction to the embedded battery pack operation unit according to the battery information and the battery information.

[0113] It should be noted that the battery information includes but is not limited to battery voltage, battery internal resistance, battery terminal temperature and other information.

[0114] In the specific process of implementing step S802, the voltage information of the busbar and the battery information of the battery unit are obtained through the control unit, and an operation mode instruction is sent to the embedded battery pack operation unit according to this information.

[0115] It can be understood that the operation mode instructions include floating charge operation mode instructions, isolation operation mode instructions, battery pack equalizing charge operation mode instructions, battery pack discharge operation mode instructions, and battery pack capacity verification operation mode instructions.

[0116] Step S803: Use the embedded battery bank operation unit to execute the operation mode instruction to control the operation modes of the battery unit and the communication power supply panel.

[0117] In the process of specifically implementing step S803, use the embedded battery bank operation unit to execute the received operation mode instruction, thereby controlling the operation modes of the battery unit and the communication power supply panel.

[0118] Specifically, the specific processes of execution and control are as follows (processes A1 to A5):

[0119] Process A1: When the operation mode instruction is the floating charge operation mode instruction, close the relay in the embedded battery bank operation unit to connect the battery unit to the busbar, so that the communication power supply panel charges the battery unit.

[0120] It can be understood that closing the relay in the embedded battery bank operation unit can achieve a direct connection between the battery unit and the busbar, so that the communication power supply panel replenishes the charge of the battery bank in the battery unit.

[0121] Process A2: When the operation mode instruction is the isolation operation mode instruction, disconnect the relay in the embedded battery bank operation unit to disconnect the connection between the battery unit and the busbar.

[0122] It can be understood that disconnecting the connection between the battery unit and the busbar can solve the damage to the battery bank life caused by the long-term floating charge operation of the battery bank.

[0123] Process A3: When the operation mode instruction is the battery bank discharge operation mode instruction, use the bidirectional DC-DC converter in the embedded battery bank operation unit to increase the output voltage of the battery bank in the battery unit to supply power to the DC load through the battery bank.

[0124] It can be understood that through the bidirectional DC-DC converter, the output voltage of the battery bank is increased to be higher than the voltage of the communication power supply panel, such as 55V voltage, so that the battery bank discharges to the DC load, thereby verifying the actual support duration of the battery bank under the condition of AC power failure.

[0125] Process A4: When the operation mode instruction is the battery bank capacity verification operation mode instruction, use the bidirectional DC-DC converter in the embedded battery bank operation unit to adjust the output voltage of the battery bank, so that the battery bank discharges the DC load based on a preset current.

[0126] Among them, the preset current can be 10C current.

[0127] Process A5: When the operation mode instruction is the battery bank equalizing charge operation mode instruction, increase the voltage of the busbar through the bidirectional DC-DC converter in the embedded battery bank operation unit to charge the battery unit using the communication power supply panel.

[0128] Specifically, when the operation mode instruction is the equalizing charge operation mode instruction of the battery pack, the bidirectional DC-DC converter embedded in the battery pack operation unit is used to boost the voltage of the busbar to the equalizing charge voltage and keep the charge quantity at a preset stable value; the relay and the isolation freewheeling module embedded in the battery pack operation unit are disconnected; and the communication power supply panel is used to charge the battery pack in the battery unit according to the equalizing charge voltage and the preset stable value.

[0129] In some specific embodiments, when the control unit detects that the communication power supply panel is in a power-off state, the control unit is used to control the relay and the isolation freewheeling module embedded in the battery pack operation unit to close, so as to connect the battery pack in the battery unit and the busbar; and the battery pack is used to supply continuous current to the busbar.

[0130] Specifically, when the control unit detects AC power failure, the control unit is used to control the relay to close (it takes 100 ms for the relay to close), and at the same time, the isolation freewheeling module is used to connect the battery pack and the busbar (it only takes 0.7 ms - 2 ms) to supply power to the DC load.

[0131] It can be understood that the rapid response of this process can ensure that the DC load is not affected at the moment of AC power failure, avoiding the instability caused by system interruption and voltage fluctuation. Through this mechanism, efficient power switching and instantaneous seamless transition can be achieved, significantly improving the reliability of the system and the stability of power supply. In addition, the system can reduce the wear of the relay and other components, extend the service life of the equipment, and at the same time reduce the probability of failure. Generally speaking, this intelligent control and rapid response mechanism improves the safety, stability and maintainability of the system, and effectively reduces the maintenance cost and failure risk.

[0132] In the embodiment of the present invention, the control unit is used to automatically adjust the charging and discharging process according to the real-time state of the battery unit, avoid overcharging or over-discharging, and extend the service life of the battery pack. Through intelligent control and automatic management, the manual operation and maintenance workload can be reduced, and the operation efficiency and stability of the battery pack can be improved.

[0133] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for a system or system embodiment, since it is basically similar to a method embodiment, the description is relatively simple. For the relevant parts, reference can be made to the description of the method embodiment. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative efforts.

[0134] Those skilled in the art can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described according to their functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0135] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control system for a battery pack operation mode, characterized in that, The system comprises: a control unit, a communication power supply panel, a DC load, a battery unit and an embedded battery pack transport unit; The control unit is respectively connected to the communication power supply screen, the battery unit and the embedded battery pack transport unit; one end of the embedded battery pack transport unit is respectively connected to the communication power supply screen and the DC load through a busbar; the other end of the embedded battery pack transport unit is connected to the battery unit; The control unit obtains the voltage information of the busbar and the battery information of the battery cell, and sends an operation mode instruction to the embedded battery pack operation unit, so that the battery cell and the communication power supply screen operate in a manner corresponding to the operation mode instruction.

2. The system according to claim 1, wherein The battery unit includes: a battery collection module and a battery pack; One end of the battery collection module is connected to the battery pack; the other end of the battery collection module is connected to the control unit; The battery pack is connected to the embedded battery pack transport unit; The battery collection module is used to collect battery information of the battery pack and send the battery information to the control unit.

3. The system according to claim 1, wherein The communication power supply panel includes a plurality of AC-DC converters; Each of the AC-DC converters is connected to the busbar; Each of the AC-DC converters is used to convert alternating current into direct current, and transmit the direct current to the busbar, so as to supply power to the DC load or the battery unit through the busbar.

4. The system according to claim 1, wherein The embedded battery pack transport unit includes a relay, an isolation freewheeling module and a bidirectional DC-DC converter; The bidirectional DC-DC converter is connected to a first common terminal connected to the relay and the isolation freewheeling module through a first switch; The first common end connected between the relay and the isolation freewheeling module is connected to the communication power supply panel through the busbar; The second common end where the relay and the isolation freewheeling module are connected is connected to the battery unit; The first common end connecting the relay and the isolation freewheeling module is connected to the control unit; The bidirectional DC-DC converter is used to increase the output voltage of the battery unit when the operation mode instruction is a battery pack discharge operation mode instruction or a battery pack core capacity operation mode instruction, so that the battery unit supplies power to the DC load through the busbar; and is also used to increase the voltage of the busbar to the equalization charging voltage when the operation mode instruction is a battery pack equalization charging operation mode instruction, so that the communication power supply screen charges the battery unit through the busbar; The relay is used to connect the battery unit and the busbar when the operation mode instruction is a floating charge operation mode instruction; Also used for disconnecting the battery unit and the busbar when the operation mode instruction is not a floating charge operation mode instruction; The isolation freewheeling module is used to connect the battery cell and the busbar when the operating mode instruction is an isolation operating mode instruction, a battery pack discharge operating mode instruction, a battery pack core capacity operating mode instruction or a battery pack equalization charging operating mode instruction; and is also used to disconnect the battery cell and the busbar when the operating mode instruction is a floating charge operating mode instruction.

5. The system according to claim 4, wherein The isolation freewheeling module includes: an insulated gate bipolar transistor (IGBT) device, a metal-oxide-semiconductor (MOS) device, and a second switch; The cathode of the MOS device is connected to one end of the second switch; the other end of the second switch is connected to the busbar; the anode of the MOS device is connected to the battery unit; One end of the IGBT device is connected to the busbar; the other end of the IGBT device is connected to the battery unit; When the operation mode instruction is an isolation operation mode instruction, a battery pack discharge operation mode instruction, a battery pack capacity verification operation mode instruction, or a battery pack equalizing charge operation mode instruction, the second switch is closed; when the operation mode instruction is a floating charge operation mode instruction, the second switch is opened.

6. The system according to claim 5, characterized in that The insulated gate bipolar transistor (IGBT) device is a self-locking switch; The metal-oxide-semiconductor (MOS) device is a diode.

7. A control method for the operation mode of a battery pack, characterized in that, Applied to the control system of the battery pack operation mode according to any one of claims 1 to 6, the method includes: Using a control unit to control the communication power supply panel to supply power to the DC load; Obtaining the voltage information of the busbar and the battery information of the battery unit through the control unit, and sending an operation mode instruction to the embedded battery pack operation unit according to the voltage information and the battery information; Using the embedded battery pack operation unit to execute the operation mode instruction to control the operation modes of the battery unit and the communication power supply panel.

8. The method according to claim 7, wherein The using the embedded battery pack operation unit to execute the operation mode instruction to control the operation modes of the battery unit and the communication power supply panel includes: When the operation mode instruction is a floating charge operation mode instruction, closing the relay in the embedded battery pack operation unit to connect the battery unit and the busbar, so that the communication power supply panel charges the battery unit; When the operation mode instruction is an isolation operation mode instruction, opening the relay in the embedded battery pack operation unit to disconnect the connection between the battery unit and the busbar; When the operation mode instruction is a battery pack discharge operation mode instruction, using the bidirectional DC-DC converter in the embedded battery pack operation unit to increase the output voltage of the battery pack in the battery unit, so as to supply power to the DC load through the battery pack; When the operation mode instruction is a battery pack capacity verification operation mode instruction, using the bidirectional DC-DC converter in the embedded battery pack operation unit to adjust the output voltage of the battery pack, so that the battery pack discharges the DC load based on a preset current; When the operation mode instruction is a battery pack equalizing charge operation mode instruction, raising the voltage of the busbar through the bidirectional DC-DC converter in the embedded battery pack operation unit, so as to use the communication power supply panel to charge the battery unit.

9. The method according to claim 8, wherein The when the operation mode instruction is a battery pack equalizing charge operation mode instruction, raising the voltage of the busbar through the bidirectional DC-DC converter in the embedded battery pack operation unit, so as to use the communication power supply panel to charge the battery unit, includes: When the operation mode instruction is the equalizing charge operation mode instruction of the battery pack, use the bidirectional DC-DC converter embedded in the battery pack operation unit to boost the voltage of the busbar to the equalizing charge voltage and keep the charge quantity at a preset stable value; Disconnect the relay and the isolation freewheeling module in the battery pack operation unit; Use the communication power supply panel to charge the battery pack in the battery unit according to the equalizing charge voltage and the preset stable value.

10. The method according to claim 7, characterized in that The method further includes: When the communication power supply panel is detected to be in a power-off state by the control unit, use the control unit to control the relay and the isolation freewheeling module in the battery pack operation unit to close, so as to connect the battery pack in the battery unit and the busbar; Use the battery pack to supply continuous current to the busbar.

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