Energy storage battery cluster control system and maintenance method

Abstract

The invention discloses an energy storage battery cluster control system and a maintenance method, the energy storage battery cluster control system comprises a service terminal, a wireless module, a PCS module and a battery cluster, the service terminal is in communication connection with the wireless module, the wireless module is in communication connection with the PCS module, the PCS module is connected with the battery cluster, and maintenance instruction information is issued through the service terminal. And the PCS module and the battery cluster are used for discharging or discharging treatment, so that the SOC information in the battery cluster is matched with the standard SOC, and the battery pack is convenient to replace. The problem that after-sales maintenance of the energy storage battery is difficult is solved, the maintenance efficiency is improved, the maintenance difficulty is reduced, and the battery module is convenient to replace.

Description

Technical Field

[0001] The present invention belongs to the field of new energy storage batteries, and specifically relates to a control system and method for energy storage battery clusters. Background Art

[0002] With the continuous development of power generation technology and the increase in the scale of new energy power generation, energy storage systems have been more and more widely promoted and applied. As a key system structure of energy storage technology, the stable operation of energy storage battery clusters is particularly critical. Currently, it is more popular to design stackable batteries, which can easily expand the capacity of battery modules or provide increased system power. Some stacks can realize parallel connection of battery modules, and some stacks can realize series connection of battery modules.

[0003] When the modules are designed to be stackable, there are many advantages, such as easy installation, capacity expansion, and easy inspection and maintenance.

[0004] However, sometimes when a battery module has an abnormal output line, if the battery module needs to be replaced after-sales maintenance, the voltage of the battery module may also be inconsistent due to the inconsistency of the battery capacity. If the capacity and voltage of the new battery module are inconsistent with those of the battery module in the original battery cluster, the addition of the new module will cause certain troubles.

[0005] Some energy storage systems will design some passive balancing modules in the battery system, but the passive balancing speed is very slow, and generally it takes a long time to wait at the maintenance site. Some configurations also have active balancing, and the power of active balancing is generally greater than that of passive balancing, but the power is still limited. It usually takes a lot of time and manpower to solve the problem at the customer site and verify whether the entire system has returned to normal. These have brought some troubles to after-sales maintenance and are not efficient. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an energy storage battery cluster control system and a maintenance method.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] An energy storage battery cluster control system, comprising:

[0009] A battery cluster includes several battery modules, and the battery modules are connected in parallel or in series;

[0010] Service terminal, used to issue instruction information and receive data information;

[0011] A wireless module is connected to the service terminal for wireless communication;

[0012] The PCS module is connected to the battery cluster and is in communication connection with the wireless module. The PCS module receives command information sent by the service terminal through the wireless module to obtain the SOC information of the battery cluster.

[0013] The wireless module includes a WiFi module, a 4G module, a 5G module or a Bluetooth module.

[0014] The service terminal is a web server or a monitoring platform.

[0015] A method for maintaining an energy storage battery cluster comprises the following steps:

[0016] Input maintenance instruction information to the service terminal. After receiving the maintenance instruction information, the service terminal transmits the maintenance instruction information to the wireless module, and the wireless module then forwards the maintenance instruction information to the PCS module;

[0017] After receiving the maintenance instruction information, the PCS module enters the maintenance mode and obtains the SOC information of the battery cluster to be maintained;

[0018] The PCS module compares the acquired SOC information with the SOC information of the new battery module, and controls the discharge or charging of the battery cluster based on the comparison results.

[0019] As a further improvement, if the SOC information of the battery cluster to be maintained is greater than the SOC information of the new battery module, the PCS module discharges the battery cluster to be maintained;

[0020] If the SOC information of the battery cluster to be maintained is less than the SOC information of the new battery module, the PCS module charges the battery cluster to be maintained;

[0021] When the battery cluster is discharging or charging, the PCS module obtains the SOC information of the battery cluster in real time. When the SOC information of the battery cluster to be maintained is equal to the SOC information of the new battery module, the discharging or charging is stopped to complete the SOC matching.

[0022] As a further improvement, an indicator light is provided on the surface of the battery cluster. When the battery cluster to be maintained stops charging or discharging, the indicator light is always on or flashes.

[0023] After completing the SOC matching, the battery modules that need maintenance in the battery cluster are replaced, and then the system is powered off and restored to normal operating mode.

[0024] As a further improvement, during the maintenance mode, if an abnormality is detected in the battery cluster during charging or discharging of the battery cluster, the system is restarted to exit the maintenance mode and restore the battery cluster to a normal operating mode.

[0025] As a further improvement, a reservation unit is built in the PCS module, and after entering the maintenance mode, the time for entering the maintenance is set through the reservation unit.

[0026] As a further improvement, the PCS module adjusts the battery cluster to a preset power during charging or during charging, sets a working time, and performs real-time detection. If the discharge or charging is not completed within the working time, a reminder is given to indicate an abnormal situation.

[0027] As a further improvement, several battery modules in the battery cluster are numbered and marked, and during the maintenance process, the corresponding numbers are displayed for the battery packs being charged or discharged.

[0028] Compared with the prior art, the present invention has the following beneficial technical effects:

[0029] Using the service terminal, you can use a mobile phone or other control terminal to send instructions to the service terminal. After receiving the instructions, the service terminal will send out maintenance on the battery modules in the battery cluster through the PCS module to achieve charging or discharging. The power of charging and discharging is much greater than the power of passive balancing and active balancing. Therefore, when it is urgent to match the battery module to be maintained with the standard SOC, the waiting time required by on-site personnel will be much shorter than other active balancing or passive balancing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the battery cluster of the present invention;

[0031] Figure 2 It is a schematic diagram of the system framework of the present invention;

[0032] Figure 3 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] refer to Figure 1 and 2 As shown, a control system for an energy storage battery cluster includes:

[0037] The battery cluster includes a plurality of battery modules, and the plurality of battery modules are connected in parallel or in series, such as battery module Pack1, battery module Pack2, battery module Pack3, battery module Pack4, and battery module PackN.

[0038] The service terminal is used to issue command information and receive data information; the wireless module is connected to the service terminal for wireless communication; the PCS module is connected to the battery cluster and the wireless module, receives the command information sent by the service terminal through the wireless module, and obtains the SOC information of the battery cluster.

[0039] The wireless module includes a WiFi module, a 4G module, a 5G module or a Bluetooth module. Alternatively, the wireless module can be replaced by an EMS module, and a variety of different communication methods can meet different usage requirements.

[0040] The service terminal is a web server or a monitoring platform, and an APP can be set on a smart phone for control to realize the sending of command information and the query of information status.

[0041] refer to Figure 1-3 As shown, a method for maintaining an energy storage battery cluster comprises the following steps:

[0042] Input maintenance instruction information to the service terminal. After receiving the maintenance instruction information, the service terminal transmits the maintenance instruction information to the wireless module, and the wireless module then forwards the maintenance instruction information to the PCS module. Maintenance instructions can be sent to the service terminal by the mobile phone or other control terminal.

[0043] After receiving the maintenance instruction information, the PCS module enters the maintenance mode and obtains the SOC information of the battery cluster to be maintained. Among them, not all battery modules in the battery cluster need to be maintained. Depending on the usage, sometimes only a part needs to be maintained. For the convenience of description, it is assumed that there are four battery modules in the battery cluster, namely battery module Pack1, battery module Pack2, battery module Pack3, battery module Pack4, and new battery module PackX. It should be noted that the SOC of new battery modules leaving the factory is generally controlled to a specific SOC value. Because the SOC of new battery modules is a known value.

[0044] The PCS module compares the acquired SOC information with the SOC information of the new battery module, and controls the discharge or charging of the battery cluster based on the comparison results.

[0045] If the SOC information of the battery cluster to be maintained is greater than the standard SOC information, the PCS module discharges the battery cluster to be maintained;

[0046] If the SOC information of the battery cluster to be maintained is less than the standard SOC information, the PCS module charges the battery cluster to be maintained;

[0047] When the battery cluster is discharging or charging, the PCS module obtains the SOC information of the battery cluster in real time. When the SOC information of the battery cluster to be maintained is equal to the standard SOC information, the discharging or charging is stopped to complete the SOC matching.

[0048] In this embodiment, by obtaining the SOC information of four battery modules, when it is found through comparison that the SOC information of the battery module is inconsistent with the SOC information of the new battery module PackX, it is necessary to maintain the abnormal Pack1 or Pack2 in the battery cluster to be maintained, that is, match according to the above steps to directly complete the matching.

[0049] An indicator light is set on the surface of the battery cluster. When the battery cluster to be maintained stops charging or discharging, the indicator light is always on or flashing, which is convenient for the staff to check. After completing the SOC matching, the battery module that needs maintenance in the battery cluster is replaced, and then the system is powered off and restored to normal operation mode.

[0050] If there is any abnormal situation during the operation of the system in maintenance mode, you can directly restart the system, that is, exit the maintenance mode, without affecting the normal operation of the system.

[0051] The power of charging and discharging the module to be maintained through PCS is much greater than the power of passive balancing and active balancing. Therefore, when the SOC of the battery module to be maintained and the new battery module need to be matched urgently, the waiting time required by the on-site personnel will be much shorter than other active balancing or passive balancing.

[0052] In addition, the PCS module has a built-in reservation unit. After entering the maintenance mode, the reservation unit is used to set the time to enter the maintenance, or to schedule maintenance at a fixed point. This time can be used by maintenance personnel to make more reasonable and planned arrangements, maximize efficiency and time arrangements, and save labor costs. The economic benefits are good and the customer experience is improved.

[0053] In addition, the PCS module adjusts the battery cluster to a preset power, sets a working time, and performs real-time detection when charging or charging the battery cluster. If the discharge or charging is not completed within the working time, a reminder will be given that there is an abnormality. According to the test data, the time required for charging and discharging can be set to a completion time interval under different powers and battery module capacities. If the discharge or charging is not completed within the set time, there may be other problems with the charging or charging, and it is necessary to check in time.

[0054] Several battery modules in the battery cluster are numbered and marked. During maintenance, the corresponding numbers of the battery packs being charged or discharged are displayed. A display screen can be set to display the numbers so that the staff can observe more intuitively.

[0055] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A control system for an energy storage battery cluster, characterized in that: include: A battery cluster includes several battery modules, and the battery modules are connected in parallel or in series; Service terminal, used to issue instruction information and receive data information; A wireless module is connected to the service terminal for wireless communication; The PCS module is connected to the battery cluster and is in communication connection with the wireless module. The PCS module receives command information sent by the service terminal through the wireless module to obtain the SOC information of the battery cluster.

2. The energy storage battery cluster control system according to claim 1, characterized in that: The wireless module includes a WiFi module, a 4G module, a 5G module or a Bluetooth module.

3. The energy storage battery cluster control system according to claim 1, characterized in that: The service terminal is a web server or a monitoring platform.

4. A method for maintaining an energy storage battery cluster, characterized in that: The following steps are involved: Input maintenance instruction information to the service terminal. After receiving the maintenance instruction information, the service terminal transmits the maintenance instruction information to the wireless module, and the wireless module then forwards the maintenance instruction information to the PCS module; After receiving the maintenance instruction information, the PCS module enters the maintenance mode and obtains the SOC information of the battery cluster to be maintained; The PCS module compares the acquired SOC information with the SOC information of the new battery module, and controls the discharge or charging of the battery cluster based on the comparison results.

5. The energy storage battery cluster maintenance method according to claim 4, characterized in that: If the SOC information of the battery cluster to be maintained is greater than the SOC information of the new battery module, the PCS module discharges the battery cluster to be maintained; If the SOC information of the battery cluster to be maintained is less than the SOC information of the new battery module, the PCS module charges the battery cluster to be maintained; When the battery cluster is discharging or charging, the PCS module obtains the SOC information of the battery cluster in real time. When the SOC information of the battery cluster to be maintained is equal to the SOC information of the new battery module, the discharging or charging is stopped to complete the SOC matching.

6. The energy storage battery cluster maintenance method according to claim 5, characterized in that: An indicator light is set on the surface of the battery cluster. When the battery cluster to be maintained stops charging or discharging, the indicator light is always on or flashes. After completing the SOC matching, the battery modules that need maintenance in the battery cluster are replaced, and then the system is powered off and restored to normal operating mode.

7. The energy storage battery cluster maintenance method according to claim 5, characterized in that: During the maintenance mode, if an abnormality is detected in the battery cluster during charging or discharging of the battery cluster, the system is restarted to exit the maintenance mode and restore the battery cluster to normal operating mode.

8. The energy storage battery cluster maintenance method according to claim 5, characterized in that: The PCS module has a built-in reservation unit. After entering the maintenance mode, the time for entering the maintenance is set through the reservation unit.

9. The energy storage battery cluster maintenance method according to claim 5, characterized in that: The PCS module charges the battery cluster or adjusts it to a preset power during the charging process, sets a working time, and performs real-time detection. If the discharge or charging is not completed within the working time, a reminder is given to indicate an abnormal situation.

10. The energy storage battery cluster maintenance method according to claim 5, characterized in that: Several battery modules in the battery cluster are numbered and marked, and during maintenance, the corresponding numbers are displayed for the battery packs being charged or discharged.

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