TW201813243A - Energy storage system and battery balancing and repairing method - Google Patents

Abstract

An energy storage system including a battery management device and a battery repair device is provided. The battery management device is electrically connected to a plurality of lead-acid batteries. The battery management device is configured to detect electrical quantities of the lead-acid batteries. The battery repair device is electrically connected to the battery management device. The battery repair device is configured to generate a pulse voltage. When the battery management device detects at least one of the lead-acid batteries which is an abnormal lead-acid battery, the battery repair device outputs the pulse voltage to the abnormal lead-acid battery to execute a repair operation for the abnormal lead-acid battery. The battery management device utilizes a backup battery to temporary replace the abnormal lead-acid battery until the repair operation is complete. In addition, a battery balancing and repairing method is also provided.

Description

Energy storage system and battery balance and repair method

The invention relates to a power system and a battery management technology, and in particular to an energy storage system and a battery balancing and repairing method.

With the advancement of green energy technology, the application of energy storage systems consisting of a large number of batteries has become more and more popular in various power systems, such as electric vehicles, emergency backup systems, renewable energy systems, smart grids or household storage. A system or device such as a device. However, due to the limited service life of current batteries, it is still necessary to perform frequent replacement operations on the batteries in the energy storage system to maintain efficient power storage and power supply efficiency. Therefore, how to effectively maintain the energy storage and power supply efficiency of the energy storage system at the same time, and reduce the replacement frequency of the storage battery in the energy storage system is an important issue at present. In view of this, the present invention will set forth the solutions of several embodiments below.

The invention provides an energy storage system and a battery balancing and repairing method, which can provide functions for monitoring lead-acid battery power, automatically repairing lead-acid batteries and battery backup, so that the energy storage system can effectively maintain good power storage and Power supply efficiency.

The energy storage system of the present invention includes a battery management device and a battery repair device. The battery management device is electrically connected to a plurality of lead-acid batteries for detecting the amount of electricity of the plurality of lead-acid batteries. A plurality of lead acid batteries are used for charging operation and discharging operation. The battery repairing device is electrically connected to the battery management device. A battery repair device is used to generate a pulse voltage. When the battery management device detects that at least one of the plurality of lead-acid batteries is a lead-acid battery having an abnormal battery capacity, the battery repair device outputs a lead-acid battery with a pulse voltage to an abnormal battery capacity, with a lead acid having an abnormal battery capacity. The battery is repaired. The battery management device temporarily replaces the lead-acid battery with abnormal battery capacity by using the backup battery until the repair operation is completed.

In an embodiment of the invention, after the charging operation is completed, the battery management device determines whether the amount of the plurality of lead-acid batteries is lower than a critical value to determine whether the lead-acid battery has an abnormal battery capacity.

In an embodiment of the invention, the battery repairing device is electrically connected to the positive electrode terminal and the negative electrode terminal of the lead-acid battery with abnormal battery capacity, and inputs at least one pulse voltage to at least one of the positive electrode terminal and the negative electrode terminal. One of them.

In an embodiment of the invention, the at least one pulse voltage includes at least one of a positive pulse voltage and a negative pulse voltage.

In an embodiment of the present invention, when the plurality of lead-acid batteries are charged, the battery management device detects whether the difference between the plurality of lead-acid batteries reaches a first preset amount of difference, to determine whether Multiple lead-acid batteries perform charge balancing operations.

In an embodiment of the invention, when the plurality of lead-acid batteries are discharged, the battery management device detects whether the difference between the plurality of lead-acid batteries reaches a second preset difference in power to determine whether Multiple lead acid batteries perform discharge balancing operations.

In an embodiment of the invention, the battery management device includes a voltage detector, an internal resistance detector, and a controller. The voltage detector is electrically connected to a plurality of lead acid batteries. The voltage detector is used to detect the voltage value of each lead acid battery. The internal resistance detector is electrically connected to a plurality of lead acid batteries. The internal resistance detector is used to detect the internal resistance of each lead-acid battery. The controller is electrically connected to the voltage detector and the internal resistance detector. The controller is configured to calculate the power of each lead-acid battery according to the voltage value and the internal resistance value of each lead-acid battery.

In an embodiment of the invention, the battery management device includes a temperature detector and a warning device. And a temperature detector electrically connected to the controller and the plurality of lead acid batteries for monitoring the temperature of each of the plurality of lead acid batteries. The alerter is electrically connected to the controller such that the alerter emits a warning signal when a temperature abnormality occurs in at least one of the plurality of lead-acid batteries.

In an embodiment of the invention, the battery management device includes a communication module. The communication module is electrically connected to the controller for communicating with an electronic device by wireless or wired transmission to provide battery status information of the plurality of lead-acid batteries to the electronic device

In an embodiment of the invention, the energy storage system includes a display device electrically connected to the battery management device for displaying battery state information of the plurality of lead acid batteries.

The battery balancing and repair method of the present invention is suitable for use in an energy storage system. The energy storage system includes multiple lead-acid batteries and backup batteries. A plurality of lead acid batteries are used for charging operation and discharging operation. Battery balancing and repair methods include detecting the amount of electricity in multiple lead-acid batteries. When at least one of the plurality of lead-acid batteries is detected as a lead-acid battery having an abnormal battery capacity, at least one pulse voltage is outputted to the lead-acid battery having an abnormal battery capacity to repair the lead-acid battery having abnormal battery capacity. Use a backup battery to temporarily replace the lead-acid battery with abnormal battery capacity until the lead-acid battery with abnormal battery capacity is repaired.

In an embodiment of the invention, the step of detecting the amount of power of the plurality of lead-acid batteries includes determining whether the amount of the plurality of lead-acid batteries is lower than a critical value after the charging operation is completed to determine the plurality of lead-acid batteries Whether the battery capacity is abnormal.

In an embodiment of the invention, the step of repairing the lead-acid battery having abnormal battery capacity includes inputting at least one pulse voltage to at least one of the positive electrode terminal and the negative electrode terminal.

In an embodiment of the invention, the at least one pulse voltage includes at least one of a positive pulse voltage and a negative pulse voltage.

In an embodiment of the invention, the step of detecting the power of the plurality of lead-acid batteries includes detecting whether the difference between the plurality of lead-acid batteries reaches the first time when the plurality of lead-acid batteries are charged. The preset power is poor to determine whether to charge balance operation for multiple lead-acid batteries.

In an embodiment of the invention, the step of detecting the power of the plurality of lead-acid batteries includes detecting whether the difference between the plurality of lead-acid batteries reaches the second when the plurality of lead-acid batteries perform the discharging operation The preset battery is poor to determine whether to perform a discharge balancing operation on multiple lead-acid batteries.

In an embodiment of the invention, the step of detecting the amount of power of the plurality of lead-acid batteries includes detecting a voltage value of the plurality of lead-acid batteries. Detect the internal resistance of multiple lead-acid batteries. Calculate the amount of lead-acid battery according to the voltage value and internal resistance value of each lead-acid battery.

In an embodiment of the invention, the battery balancing and repair method further includes monitoring the temperature of the plurality of lead acid batteries. A warning signal is issued when a temperature abnormality is detected in at least one of the plurality of lead-acid batteries.

In an embodiment of the invention, the battery balancing and repair method further includes communicating with the electronic device through wireless/wired transmission to provide battery status information of the plurality of lead-acid batteries to the electronic device.

In an embodiment of the invention, the battery balancing and repairing method further includes displaying the amount of power of the plurality of lead-acid batteries by using the display device.

Based on the above, the energy storage system of the embodiment of the present invention can detect the power of the lead-acid battery in the energy storage system by using the battery management device, and repair the lead-acid battery with abnormal battery capacity by using the battery repair device, so as to be effective. Maintain energy storage and power supply efficiency of the energy storage system. In addition, the energy storage system of the embodiment of the present invention is further provided with a backup battery to provide power backup capability that is lacking when the battery is repaired.

The above described features and advantages of the invention will be apparent from the following description.

The invention is illustrated by the following examples, but the invention is not limited to the illustrated embodiments. Further combinations are also allowed between the embodiments. The term "electrical connection" as used throughout the specification (including the scope of the patent application) may be used in any direct or indirect connection. For example, if the first device is described as being electrically connected to the second device, it should be construed that the first device can be directly connected to the second device, or the first device can be indirectly through other devices or some means of connection. Connected to the second device.

1 is a schematic diagram of an energy storage system in accordance with an embodiment of the present invention. Referring to FIG. 1 , the energy storage system 100 includes a battery management device 110 and a battery repair device 120 . The battery management device 110 is electrically connected to the battery repair device 120 and electrically connected to the plurality of lead acid batteries 130. In this embodiment, the lead-acid batteries 130 are electrically connected to the microcontroller 130_1, respectively. These lead-acid batteries 130 are used for charging operations and discharging operations. Moreover, the battery management device 110 is configured to detect the amount of power of the lead-acid batteries 130. The battery repairing device 120 is for generating a pulse voltage. In the present embodiment, the lead-acid batteries 130 are electrically connected to each other by a plurality of microcontrollers 130_1, and voltage signals are supplied to the positive electrode terminals and the negative electrode terminals of each of the lead-acid batteries 130 through the microcontrollers 130_1. However, the electrical connection manner of these lead-acid batteries 130 is not limited to that shown in FIG. In an embodiment, the lead-acid batteries 130 may also be battery arrays that are connected in series, in parallel, or partially in series, partially in parallel.

In the present embodiment, the energy storage system 100 can be disposed in a system or device such as an electric vehicle, an emergency backup system, a renewable energy system, a smart grid, or a household energy storage device. The energy storage system 100 can monitor the amount of power of the lead-acid batteries 130 by the battery management device 110 to determine the storage capacity of the lead-acid batteries 130. In this embodiment, the lead-acid batteries 130 may be (shallow cycle) non-gel batteries, (deep cycle) gel batteries or (deep cycle) semi-colloid batteries (half-gel battery). And the like, the invention is not limited.

It is to be noted that, in this embodiment, during the repeated charging and discharging process of the lead-acid battery 130, at least one of the positive electrode terminal and the negative electrode terminal of the battery undergoes a chemical reaction to generate lead sulfate crystals, thereby causing the battery to be Vulcanization occurs at the positive electrode terminal and the negative electrode terminal. However, when the lead acid battery has too much crystallization of lead sulfate, it will result in a decrease in the storage capacity of the lead-acid battery or a shortened battery life. That is, in the present embodiment, the lead-acid battery of the abnormal battery capacity means that there is excessive leaching of lead sulfate in the lead-acid battery to reduce the storage capacity (effective battery capacity). Reduce) poor battery. Therefore, in the present embodiment, the energy storage system 100 can be used to monitor the lead-acid battery 130, and can be used to repair a lead-acid battery with abnormal battery capacity. In other words, the energy storage system 100 can extend the service life of the lead-acid battery 130 by repairing the function of the battery, and the battery array can maintain good power storage and power supply capability.

In addition, in the present embodiment, when the energy storage system 100 repairs the lead-acid battery with abnormal battery capacity, the energy storage system 100 can temporarily replace the lead-acid battery with abnormal battery capacity by using the backup battery 140 until the repair operation ends. In the present embodiment, the backup battery 140 may be an additional lead acid battery, but the invention is not limited thereto. The backup battery 140 can also be other battery types than lead acid batteries. In the present embodiment, after the lead-acid battery with abnormal battery capacity is repaired, the energy storage system 100 will stop using the backup battery 140. Moreover, when the backup battery 140 is not used, the energy storage system 100 can perform a charging operation on the backup battery 140 so that the backup battery 140 can maintain a good backup capability.

In the embodiment, the battery management device 110 is a battery management system (BMS). The battery management device 110 can have a battery charge detection mechanism and manage the charge and discharge mechanism of the battery to maintain the battery balance of the plurality of batteries. The battery management device 110 can be used to perform the battery balancing and repair methods of various embodiments of the present invention. That is, the battery management device 110 can implement the battery balancing and repairing method described in the present invention by a software program or a hardware logic circuit, which is not limited by the present invention.

In addition, these microcontrollers 130_1 are microcontroller (MCU) circuits having an electronic tag function. In the present embodiment, the microcontroller 130_1 can be used to provide relevant battery information to the battery management device 110 to enable the battery management device 110 to efficiently manage and identify these lead-acid batteries 130. Moreover, the battery management device 110 can provide voltage signals to the positive and negative electrode terminals of the lead-acid batteries 130 through the microcontroller 130_1.

2 is a schematic diagram of repair of an energy storage system according to an embodiment of the present invention. Referring to FIG. 2, in the embodiment, when the battery management device 210 of the energy storage system 200 detects that one of the plurality of lead-acid batteries 230 of the battery array is the lead-acid battery 230b with abnormal battery capacity, the battery The management device 210 will isolate the lead-acid battery 230b having an abnormal battery capacity. The battery management device 210 switches the lead-acid battery 230b having an abnormal battery capacity to the battery repairing device 220 so that the battery repairing device 220 is electrically connected to the lead-acid battery 230b having an abnormal battery capacity. Further, the battery management device 210 temporarily replaces the lead-acid battery 230b having an abnormal battery capacity by using the backup battery 240. That is to say, the backup battery 240 can be electrically connected to other lead-acid batteries with normal storage capacity, so that the battery array can maintain normal power storage or power supply functions. Therefore, the energy storage system 200 of the present embodiment can be used to enable the battery array of FIG. 2 when the lead-acid battery 230 of one of the battery arrays shown in FIG. 2 cannot be effectively stored by the battery backup mechanism described above. It can still maintain normal power storage or power supply functions. In other words, the energy storage system 200 of the present embodiment can continue to perform the function of storing electricity or supplying power without waiting for replacement or repair of the lead-acid battery 230b with abnormal battery capacity.

In the present embodiment, the battery repairing device 220 is electrically connected to the positive electrode terminal and the negative electrode terminal of the lead-acid battery 230b having abnormal battery capacity. The battery repairing device 220 can be used to generate a single pulse voltage, a double-order pulse voltage, or a positive electrode terminal and a negative electrode terminal of a lead-acid battery 230b having a basic potential (0 V) to abnormal battery capacity. In the present embodiment, the battery repairing device 220 may provide a pulse voltage for at least one of the positive electrode terminal or the negative electrode terminal of the lead-acid battery 230b having abnormal battery capacity for battery repair. That is, the battery repairing device 220 inputs the voltage signal to the positive electrode terminal and the negative electrode terminal of the lead-acid battery, and provides at least one pulse voltage to the lead-acid battery 230b with abnormal battery capacity, so that the battery capacity is abnormal by the pulse voltage. The lead acid battery 230b is repaired. Accordingly, the energy storage system 200 of the present embodiment can simultaneously have the functions of battery power monitoring, battery backup, and automatic repair of lead-acid batteries.

For example, in this embodiment, after the charging operation is completed, the battery management device 210 determines whether the amount of the lead-acid batteries is lower than a preset threshold to determine whether the lead-acid batteries have an abnormal battery capacity. That is to say, due to excessive crystals of lead sulfate in lead-acid batteries, the effective battery capacity of lead-acid batteries will decrease. Therefore, after the charging operation is completed, if the battery management device 210 detects that the amount of the lead-acid battery is still lower than 80% of the normal power, indicating that the effective battery capacity of the lead-acid battery is only 80%, the battery management The device 210 will determine that the lead acid battery is a lead acid battery having an abnormal battery capacity. However, in an embodiment, the preset threshold may also be set to 40%, 50% or 60% of the normal amount of electricity, etc., and the invention is not limited thereto.

In this embodiment, the battery management device 210 can determine whether to perform the battery repair operation by determining whether the lead-acid battery has a power greater than a preset threshold after the charging operation is completed. In this embodiment, the battery repairing device 220 inputs at least one pulse voltage to at least one of the positive electrode terminal and the negative electrode terminal of the lead-acid battery having abnormal battery capacity to remove the lead acid having abnormal battery capacity by the pulse voltage. Sulfuric acid crystals in the battery to restore the storage capacity of the lead-acid battery.

It is to be noted that the pulse voltage of the present embodiment is a lead sulfate crystal among the lead-acid batteries 230b for removing abnormal battery capacity. That is to say, the principle of the present invention for removing lead sulfate crystals is to charge the lead-acid battery 230b with abnormal battery capacity by using a pulse voltage to reduce the sulfurization of the lead-acid battery.

In addition, in the present embodiment, the microcontroller 230_2 of FIG. 2 can obtain sufficient teachings, suggestions, and implementation descriptions from the description of the embodiment of FIG. 1 described above, and thus will not be described again.

3 is a schematic diagram of a pulse voltage according to an embodiment of the present invention. Please refer to Figures 2 and 3. In the present embodiment, the pulse voltage VP1 represents a Pulse Width Modulation (PWM) signal. The pulse voltage VP2 represents a negative pulse width modulation signal. In the present embodiment, the battery repairing device 220 can output at least two voltage waveforms such as pulse voltages VP1 and VP2. In the present embodiment, the pulse voltage VP1 can be input to the positive electrode terminal of the lead-acid battery 230b having an abnormal battery capacity to resonate with the lead sulfate crystal at the positive electrode end and reduce the lead sulfate crystal. The pulse voltage VP2 can be input to the negative electrode terminal of the lead-acid battery 230b having an abnormal battery capacity to resonate with the lead sulfate crystal at the negative electrode end and reduce the lead sulfate crystal. It should be noted that the pulse voltage VP1 and the pulse voltage VP2 of the present embodiment can be modulated by a pulse width modulation circuit for a duty cycle and a frequency, which is not limited in the present invention.

In the present embodiment, the battery repairing device 220 can output at least the pulse voltage VP1 or the pulse voltage VP2 to the positive and negative electrode terminals of the lead-acid battery 230b whose battery capacity is abnormal. For example, the battery repair device 220 can set four repair modes to sequentially perform a repair operation on the lead-acid battery 230b with abnormal battery capacity. In the first repair mode, the battery repairing device 220 can simultaneously output the pulse voltage VP1 and the pulse voltage VP2 to the positive and negative electrode ends of the lead-acid battery 230b with abnormal battery capacity to resonate the lead sulfate crystals at the positive and negative electrode ends. In the second repair mode, the battery repairing device 220 may output only the pulse voltage VP2 to the negative electrode terminal of the lead-acid battery 230b whose battery capacity is abnormal. In the third repair mode, the battery repairing device 220 can simultaneously output the pulse voltage VP1 and the pulse voltage VP2 to the positive and negative electrode ends of the lead-acid battery 230b with abnormal battery capacity to resonate the lead sulfate crystals at the positive and negative electrode ends. However, the pulse frequency of the pulse voltage of the third repair mode may be different from the first repair mode, and the present invention is not limited thereto. In the fourth repair mode, the battery repairing device 220 may output only the pulse voltage VP1 to the positive electrode terminal of the lead-acid battery 230b whose battery capacity is abnormal. Accordingly, the battery repairing device 220 of the present embodiment can effectively remove the lead sulfate crystals in the lead-acid battery 230b having abnormal battery capacity through the repeated repair operation, so as to restore the power storage capacity of the normal lead-acid battery.

Incidentally, the pulse voltage VP1 may have a peak voltage V1, and the pulse voltage VP2 may have a peak voltage V2. In the present embodiment, the voltage difference between the peak voltage V1 of the pulse voltage VP1 and the highest voltage (0 volt) of the pulse voltage VP2 may be equal to the voltage difference of the peak voltage V2 of the pulse voltage VP2 to the lowest voltage V0 of the pulse voltage VP1. For example, in one embodiment, the peak voltages V1, V2 can be 14.7 volts and -12 volts. The voltage V0 can be 2.7V. However, the present invention is not limited thereto, and the magnitudes of the peak voltages V1, V2 and the voltage V0 may be determined depending on the battery characteristics or the degree of repair of the lead-acid battery, and the present invention is not limited thereto. In addition, the periodic frequency of the pulse voltage VP1 and the pulse voltage VP2 can also be determined according to the battery characteristics of the lead-acid battery or other battery repair conditions, and the present invention is not limited thereto.

FIG. 4 is a schematic diagram of a fuel balance of a charging operation according to an embodiment of the present invention. Referring to FIG. 4, the battery management device 410 is electrically connected to the lead-acid batteries 430_1, 430_2, 430_3, 430_4. The power distribution device 500a is used to charge the lead-acid batteries 430_1, 430_2, 430_3, 430_4. Specifically, when the lead-acid batteries 430_1, 430_2, 430_3, 430_4 perform a charging operation, the battery management device 410 can monitor the amount of power of the lead-acid batteries 430_1, 430_2, 430_3, 430_4. If the difference in the amount of electricity between the lead-acid batteries 430_1, 430_2, 430_3, 430_4 reaches the first preset amount of difference, the battery management device 410 will charge balance the lead-acid batteries 430_1, 430_2, 430_3, 430_4. That is, the battery management device 410 can reduce the difference in the amount of electricity between the lead-acid batteries 430_1, 430_2, 430_3, 430_4 by controlling the magnitude of the charging current or voltage. For example, in the charging operation, when the amount of the lead-acid battery 430_3 is too low, and the difference between the amount of the lead-acid battery 430_3 and the lead-acid batteries 430_1, 430_2, 430_4 is greater than the preset first preset difference . The battery management device 410 can adjust the magnitude of the charging current or the charging voltage provided by the power distribution device 500 to the lead-acid batteries 430_1, 430_2, 430_3, 430_4, so that the power distribution device 500a can provide a larger charging current or charging voltage to the lead-acid battery 430_3. . However, the operation of the charge balancing of the present invention is not limited thereto, and the battery management device 410 may determine the respective charging voltage or current magnitude according to the magnitude of the amount of power of the lead-acid batteries 430_1, 430_2, 430_3, and 430_4, respectively.

FIG. 5 is a schematic diagram of a fuel balance of a discharge operation according to an embodiment of the present invention. Referring to FIG. 5, the battery management device 410 is electrically connected to the lead-acid batteries 430_1, 430_2, 430_3, 430_4. The lead acid batteries 430_1, 430_2, 430_3, 430_4 can be discharged to the output load 500b. Specifically, when the lead-acid batteries 430_1, 430_2, 430_3, 430_4 perform a discharge operation, the battery management device 410 can monitor the amount of power of the lead-acid batteries 430_1, 430_2, 430_3, 430_4. If the difference in the amount of electricity between the lead-acid batteries 430_1, 430_2, 430_3, and 430_4 reaches the second preset amount of difference, the battery management device 410 will discharge balance the lead-acid batteries 430_1, 430_2, 430_3, and 430_4. That is, the battery management device 410 can reduce the difference in the amount of electricity between the lead-acid batteries 430_1, 430_2, 430_3, 430_4 by controlling the magnitude of the discharge current or voltage. For example, in the discharge operation, when the amount of the lead-acid battery 430_2 is too low, and the difference between the amount of the lead-acid battery 430_2 and the lead-acid batteries 430_1, 430_3, 430_4 is greater than the preset second preset difference . The battery management device 410 can adjust the discharge current or the discharge voltage of the lead-acid battery 430_1, 430_2, 430_3, 430_4 to the output load 500b, so that the lead-acid battery 430_2 can output a small discharge current or discharge voltage to the output load 500b. . However, the operation of the discharge balance of the present invention is not limited thereto, and the battery management device 410 may determine the respective discharge voltages or current sizes according to the magnitudes of the amounts of electricity of the lead-acid batteries 430_1, 430_2, 430_3, and 430_4, respectively.

In addition, the first preset power difference and the second preset power difference of FIG. 4 and FIG. 5 can be determined according to the battery characteristics of the lead-acid battery or other battery repair conditions. For example, in an embodiment, in the charging operation or the discharging operation, the battery management device 410 can determine whether the difference in the amount of electricity between the lead-acid batteries 430_1, 430_2, 430_3, and 430_4 reaches 5%, 10% of the standard battery capacity. Or 20%, etc., to decide whether to perform a charging operation or a discharging operation.

6 is a schematic diagram of an energy storage system according to another embodiment of the present invention. Referring to FIG. 6, the implementation architecture of the energy storage system of the present invention can be as shown in FIG. 6. In this embodiment, the plurality of lead-acid batteries 630 can be electrically connected in series and electrically connected to the power distribution device 600 for energy storage or energy supply. In this embodiment, the lead-acid batteries 630 can be electrically connected to the plurality of microcontrollers 650, respectively, and the microcontrollers 650 are electrically connected to each other. In this embodiment, the microcontrollers 650 are respectively configured to detect the power of the corresponding lead-acid battery and transmit the detection result back to the battery management device 610. However, the present invention is not limited thereto. In an embodiment, the microcontrollers 650 may also be disposed in the battery management device 610 or implemented in other logic circuit architectures in the battery management device 610.

In the present embodiment, the battery management device 610 is electrically connected to the power distribution device 660, and performs charging and discharging operations as shown in FIGS. 4 and 5 described above. In this embodiment, the energy storage system 600 can further include a display device 670 electrically connected to the battery management device 610. Display device 670 is used to display battery status information of these lead-acid batteries 630. That is, the energy storage system 600 can have a display function to present current battery status information to increase the ease of operation of the energy storage system 600. In the present embodiment, the display device 670 is, for example, a liquid crystal display (LCD) or a touch screen with a touch module, and the like, which is not limited by the present invention.

In addition, in the present embodiment, the energy storage system 600 can further communicate with the external control device 700 and the electronic device 800. The energy storage system 600 can transmit current battery status information to the external control circuit 700 and the electronic device 800 in a wired or wireless transmission manner. For example, the energy storage system 600 of the present embodiment can be applied to systems or devices such as electric vehicles, emergency backup systems, renewable energy systems, smart grids, or household energy storage devices. Therefore, the energy storage system 600 can communicate with the consoles of the systems or devices themselves to provide battery status information, or provide the user with the ability to control the energy storage system 600 through the external control device 700.

Incidentally, the energy storage system 600 of the present embodiment can also communicate with other electronic devices 800 to increase the convenience of the operation of the energy storage system 600. In the embodiment, the electronic device 800 refers to an electronic device that is small in size and can be carried around, such as a mobile phone, a NOTE BOOK, a personalized digital assistant (PDA), etc., and the present invention. There are no restrictions.

FIG. 7 is a schematic diagram of a battery management device according to an embodiment of the present invention. Referring to FIG. 7, the battery management device 910 of FIG. 7 can be applied to the battery management device in each of the above embodiments. In this embodiment, the battery management device 910 can include a controller 911, a voltage detector 912, an internal resistance detector 913, a temperature detector 914, an alarm 915, and a communication module 916. In this embodiment, the voltage detector 912 is electrically connected to the lead acid battery. Voltage detector 912 can be used to detect the voltage value of the lead acid battery. The internal resistance detector 913 is electrically connected to the lead acid battery. The internal resistance detector 913 can be used to detect the internal resistance of the lead-acid battery.

In this embodiment, the controller 911 may be a hardware (eg, a chipset, a processor, etc.) having computing capabilities for controlling the overall operation of the battery management device 910. The controller 911 is, for example, a central processing unit (CPU), or other programmable microprocessor (Microprocessor), a digital signal processor (DSP), a programmable controller, and a special application. Application Specific Integrated Circuits (ASICs), Programmable Logic Devices (PLDs), or the like.

Specifically, in the embodiment, the controller 911 can obtain the voltage value and the internal resistance value of the lead-acid battery by using the voltage detector 912 and the internal resistance detector 913, and according to the voltage value of the lead-acid battery. The resistance is used to calculate the amount of lead acid battery. In this embodiment, the controller 911 can also detect the temperature value of the lead-acid battery through the temperature detector 914, so that the controller 911 has the function of monitoring the temperature of the lead-acid battery. Moreover, the controller 911 can raise an alarm of excessive temperature through the warning device 915 to effectively prevent the lead acid battery from overheating. However, the present invention is not limited thereto, and the alerter 915 can also be used to provide other alert functions, such as a battery replacement reminder or a surge alert.

In addition, in this embodiment, the battery management device 910 can also configure the communication module 916 to enable the controller 911 to communicate with the external electronic device 1000 through the communication module 916 to provide battery status information or control functions. . In this embodiment, the communication module 916 supports, for example, Wireless Fidelity (Wi-Fi), Worldwide Interoperability for Microwave Access (WiMAX), Bluetooth, and Ultra Wideband ( An ultra-wideband (UWB) or radio-frequency identification (RFID) communication protocol device that can transmit a wireless transmission signal to establish a data transmission connection with a communication module of the electronic device 1000.

FIG. 8 illustrates a battery balancing and repairing method according to an embodiment of the invention. Referring to FIG. 2 and FIG. 8 simultaneously, the method of this embodiment can be applied to at least the energy storage system of FIG. 2. In step S1110, the battery management device 110 of the energy storage system 100 detects the amount of power of the plurality of lead-acid batteries 130. In step S1120, when the battery management device 110 detects that at least one of the lead-acid batteries 130 is a lead-acid battery with abnormal battery capacity, the battery repair device 120 outputs at least one pulse voltage to the lead-acid battery with abnormal battery capacity. To repair the lead-acid battery with abnormal battery capacity. In step S1130, the energy storage system 100 temporarily replaces the lead acid battery having abnormal battery capacity with the backup battery 140 until the lead acid battery having abnormal battery capacity is repaired. Therefore, the battery balancing and repairing method of the embodiment can enable the energy storage system to have the function of monitoring the lead-acid battery power, automatically repairing the lead-acid battery, and the battery backup.

In addition, in the present embodiment, the battery balancing and repairing method can obtain sufficient teaching, suggestion and implementation description from the description of the embodiment of FIG. 1 to FIG. 7, respectively, and therefore will not be described again.

In summary, in an exemplary embodiment of the present invention, the energy storage system can effectively monitor the power of a plurality of lead-acid batteries by the battery management device, and the battery management device can maintain the lead-acid batteries during charging and discharging operations. The balance of electricity. Moreover, the energy storage system can repair the lead-acid battery with abnormal battery capacity by using the battery repair device, so as to maintain the service life of the lead-acid battery, and even effectively maintain the energy storage and power supply performance of the energy storage system. In addition, the energy storage system of the present invention also has a backup battery design to enable the energy storage system to continuously perform power storage and power supply functions without being affected by battery repair operations. That is to say, the energy storage system of the present invention can simultaneously provide functions of monitoring, automatically repairing lead-acid batteries and redundancy. In addition, the energy storage system of the present invention can also display the current battery energy storage state information in combination with the display device, and combine the communication module to provide the battery state information or control function to the external portable electronic device, so that Increase the convenience of using energy storage systems.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100, 200, 600 ‧ ‧ energy storage system

110, 210, 410, 610, 910‧‧‧ battery management device

120, 220‧‧‧Battery repair device

130, 230, 430_1, 430_2, 430_3, 430_4, 630‧‧ lead-acid batteries

130_1, 230_1, 650‧‧Microcontrollers

140, 240‧‧‧ spare battery

230b‧‧‧Lead acid battery with abnormal battery capacity

500a, 660‧‧‧ power distribution units

500b‧‧‧output load

670‧‧‧ display device

700‧‧‧External control device

800, 1000‧‧‧ electronic devices

911‧‧‧ controller

912‧‧‧Voltage Detector

913‧‧‧Internal resistance detector

914‧‧‧Temperature Detector

915‧‧‧ warning device

916‧‧‧Communication module

V0, V1, V2‧‧‧ voltage

VP1, VP2‧‧‧ pulse voltage

S1110, S1120, S1130‧‧‧ steps

1 is a schematic diagram of an energy storage system in accordance with an embodiment of the present invention. 2 is a schematic diagram of repair of an energy storage system according to an embodiment of the present invention. 3 is a schematic diagram of a pulse voltage according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a fuel balance of a charging operation according to an embodiment of the present invention. FIG. 5 is a schematic diagram of a fuel balance of a discharge operation according to an embodiment of the present invention. 6 is a schematic diagram of an energy storage system according to another embodiment of the present invention. FIG. 7 is a schematic diagram of a battery management device according to an embodiment of the present invention. FIG. 8 illustrates a battery balancing and repairing method according to an embodiment of the invention.

Claims (20)

An energy storage system includes: a battery management device electrically connected to a plurality of lead-acid batteries for detecting the amount of electricity of the lead-acid batteries, wherein the lead-acid batteries are used for performing a charging operation and a discharging operation; And a battery repairing device electrically connected to the battery management device for generating at least one pulse voltage, wherein when the battery management device detects that at least one of the lead-acid batteries is a lead with abnormal battery capacity In the case of an acid battery, the battery repairing device outputs the at least one pulse voltage to the lead-acid battery having abnormal battery capacity, to perform a repair operation on the lead-acid battery having abnormal battery capacity, and the battery management device temporarily replaces the battery with a spare battery The lead-acid battery with abnormal battery capacity until the end of the repair operation. The energy storage system of claim 1, wherein when the charging operation is finished, the battery management device determines whether the amount of the lead-acid batteries is lower than a critical value to determine whether the lead-acid batteries are generated. The battery capacity is abnormal. The energy storage system of claim 1, wherein the battery repairing device is electrically connected to a positive electrode terminal and a negative electrode terminal of the lead acid battery having abnormal battery capacity, and the at least one pulse voltage is input to At least one of the positive electrode end and the negative electrode end. The energy storage system of claim 1, wherein the at least one pulse voltage comprises at least one of a positive pulse voltage and a negative pulse voltage. The energy storage system of claim 1, wherein when the lead-acid batteries perform the charging operation, the battery management device detects whether the difference between the lead-acid batteries reaches a first preset The battery is poor to determine whether to perform a charge balancing operation on the lead-acid batteries. The energy storage system of claim 1, wherein when the lead-acid batteries perform the discharging operation, the battery management device detects whether the difference between the lead-acid batteries reaches a second preset The battery is poor to determine whether to perform a discharge balancing operation on the lead-acid batteries. The energy storage system of claim 1, wherein the battery management device comprises: a voltage detector electrically connected to the lead acid batteries for detecting a voltage of each of the lead acid batteries An internal resistance detector electrically connected to the lead acid batteries for detecting an internal resistance of each of the lead acid batteries; and a controller electrically connected to the voltage detector And the internal resistance detector is configured to calculate the power of each of the lead-acid batteries according to the voltage value and the internal resistance value of each of the lead-acid batteries. The energy storage system of claim 1, wherein the battery management device comprises: a temperature detector electrically connected to the controller and the lead acid batteries for monitoring each of the lead acids a temperature of the battery; and a warning device electrically connected to the controller to cause a warning signal when the temperature abnormality occurs in at least one of the lead-acid batteries. The energy storage system of claim 1, wherein the battery management device comprises: a communication module electrically connected to the controller for communicating with an electronic device via wireless transmission to provide The battery status information of the lead-acid batteries is to the electronic device. The energy storage system of claim 1, further comprising: a display device electrically connected to the battery management device for displaying battery state information of the lead acid batteries. A battery balancing and repairing method is applicable to an energy storage system, and the energy storage system comprises a plurality of lead acid batteries and a backup battery, wherein the lead acid batteries are used for performing a charging operation and a discharging operation, wherein the battery The repairing method includes: detecting a quantity of the lead-acid batteries; and detecting that at least one of the lead-acid batteries is a lead-acid battery having an abnormal battery capacity, outputting the at least one pulse voltage to the abnormal battery capacity The lead-acid battery is repaired by the lead-acid battery having abnormal battery capacity; and the lead-acid battery having abnormal battery capacity is temporarily replaced by a spare battery until the lead-acid battery having abnormal battery capacity is repaired. The method for balancing and repairing a battery according to claim 11, wherein the step of detecting the amount of the lead-acid battery comprises: determining whether the amount of the lead-acid battery is lower than a critical value after the charging operation is completed Value to determine if the lead-acid batteries have abnormal battery capacity. The battery balancing and repairing method according to claim 11, wherein the step of repairing the lead-acid battery having abnormal battery capacity comprises: inputting at least one pulse voltage into the positive electrode terminal and the negative electrode terminal At least one of them. The battery balancing and repairing method of claim 11, wherein the at least one pulse voltage comprises at least one of a positive pulse voltage and a negative pulse voltage. The battery balancing and repairing method of claim 11, wherein the step of detecting the amount of the lead-acid battery includes: detecting the lead-acid batteries when the lead-acid batteries perform the charging operation Whether the difference between the electric powers reaches a first preset electric quantity difference to determine whether to perform a charge balancing operation on the lead acid batteries. The method for balancing and repairing a battery according to claim 11, wherein the step of detecting the amount of the lead-acid battery includes: detecting the lead-acid batteries when the lead-acid batteries perform the discharging operation Whether the difference between the electric quantities reaches a second preset electric quantity difference to determine whether to perform a discharge balancing operation on the lead acid batteries. The battery balancing and repairing method of claim 11, wherein the detecting the power of the lead-acid battery comprises: detecting a voltage value of the lead-acid battery; detecting the lead-acid battery An internal resistance value; and calculating the amount of the lead-acid battery according to the voltage value of each of the lead-acid batteries and the internal resistance value. The method for balancing and repairing a battery according to claim 11, further comprising: monitoring a temperature of the lead acid battery; and detecting a temperature abnormality of at least one of the lead acid batteries; A warning signal. The battery balancing and repairing method of claim 11, further comprising: communicating with an electronic device by wireless transmission to provide battery status information of the lead-acid batteries to the electronic device. The method for balancing and repairing a battery according to claim 11, further comprising: displaying the amount of the lead-acid battery by using a display device.