Series-parallel connection management method and system of energy storage all-in-one machine

Abstract

The invention provides a series-parallel connection management method and system for an energy storage all-in-one machine, and the method comprises the steps: obtaining a first voltage sequence according to the first voltage information of each battery in the energy storage all-in-one machine and a preset first sorting mode; according to first target voltage information required by a load, grouping the first voltage sequence according to a preset grouping mode to obtain at least two voltage series combinations; then, first temperature information of the voltage series combination is obtained according to the temperature information of the battery, and is used for obtaining a first current proportion sequence according to a preset second sorting mode; and finally, obtaining first current information of the voltage series combination according to first target current information required by the load and the first current proportion sequence. By intelligently switching the series-parallel connection states of the batteries of the energy storage all-in-one machine, the electricity utilization voltage requirement of the load is met, then the current value of each series connection combination is intelligently adjusted according to the temperature information of the batteries, the service life of the batteries is prolonged, and the safety of the batteries is improved.

Description

Technical Field

[0001] The present invention relates to the field of power supply control, and more specifically, to a series-parallel management method and system for an integrated energy storage device. Background Art

[0002] The integrated energy storage machine is a kind of energy storage equipment, which highly integrates the battery energy storage system, energy conversion system and intelligent control system to achieve efficient storage and utilization of energy. As one of the core components of the integrated energy storage machine, the battery pack can store excess electric energy and release it when needed, thereby balancing the supply and demand of the power grid. This equipment not only improves the utilization rate of electric energy, but also effectively alleviates the energy shortage problem caused by fluctuations in electricity demand.

[0003] An integrated energy storage device is usually composed of several batteries. Multiple batteries are connected in series to form a series group, so that the voltage of the series group meets the power supply demand of the load. Multiple series groups are connected in parallel to add up the currents of each series group to meet the power demand of the load. Therefore, there is an urgent need for a series-parallel management technology for an integrated energy storage device that can accurately control the series-parallel state of the battery to meet the power supply demand of the load and take into account the safety of battery use. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a series-parallel management method and system for an energy storage integrated machine. First, the voltage values ​​of the batteries are arranged into a first voltage sequence, and the batteries are combined according to the voltage requirements of the load according to the first voltage sequence to generate at least two voltage series combinations; then, the first temperature information of the voltage series combination is calculated according to the temperature value of the battery, and the first current ratio sequence is obtained according to the deviation value between the first temperature information and the target operating temperature of the battery; finally, the current value required to be provided by each voltage series combination is adjusted according to the current required by the load and the first current ratio sequence; the present invention meets the power voltage requirement of the load by intelligently switching the series-parallel state of the batteries of the energy storage integrated machine, and then intelligently adjusts the current value of each series combination according to the temperature information of the battery, thereby improving the service life and safety of the battery.

[0005] A first aspect of the present invention provides a series-parallel management method for an energy storage integrated device, the method comprising: Acquiring first voltage information; Obtaining a first voltage sequence according to the first voltage information and in a preset first sorting manner; According to the set first target voltage information, the first voltage sequence is grouped in a preset grouping manner to obtain at least two voltage series combinations; Based on the voltage series combination, obtaining first temperature information; According to the first temperature information, a first current ratio sequence is obtained according to a preset second sorting method; The first current information of the voltage series combination is obtained according to the set first target current information and the first current ratio sequence.

[0006] In this solution, the first voltage sequence is grouped according to the set first target voltage information in a preset grouping manner to obtain at least two voltage series combinations, specifically: Based on the second voltage information of the first voltage sequence, a first voltage series combination is established, and the first voltage sequence is updated; Calculating a difference between the second voltage information and the first target voltage information to obtain second target voltage information; Determining whether the second target voltage information is greater than 0; If yes, the grouping operation of the first voltage series combination is completed; If not, completing the grouping operation of the first voltage series combination according to the first voltage sequence and the second target voltage information and a preset grouping method; Obtaining third voltage information according to the first voltage sequence; determining whether the third voltage information is lower than the first target voltage information; If yes, the grouping operation ends; If not, continue with the grouping operation.

[0007] In this solution, the grouping operation of the first voltage series combination is completed according to the first voltage sequence and the second target voltage information and a preset grouping method, specifically: According to the first voltage sequence, determining whether there is a voltage value exceeding the second target voltage information; If yes, obtaining fourth voltage information according to the first voltage information; Setting the fourth voltage information in the first voltage series combination, updating the first voltage sequence, and ending the grouping operation of the first voltage series combination; If not, setting the maximum value of the first voltage sequence to the first voltage series combination; updating the second target voltage information and the first voltage sequence according to a difference between a maximum value of the first voltage sequence and the second target voltage information; The grouping operation of the first voltage series combination continues to be performed according to the first voltage sequence and the second target voltage information.

[0008] In this solution, the first temperature information is obtained based on the voltage series combination, specifically: Based on the voltage series combination, obtaining second temperature information; Obtaining a first temperature sequence according to the second temperature information; According to the first temperature sequence, the first temperature information is obtained according to a preset weighted average algorithm or a preset deviation value extraction algorithm.

[0009] In this solution, according to the first temperature sequence, the first temperature information is obtained according to a preset deviation value extraction algorithm, specifically: Based on the first temperature sequence, selecting third temperature information in sequence; sequentially calculating the difference between the third temperature information and the temperature values ​​in the first temperature sequence to obtain a first deviation value; Calculating the sum of the absolute values ​​of the first deviation values ​​to obtain a second deviation value; According to the second deviation value, a first deviation value sequence is obtained; The third temperature information corresponding to the minimum value in the first deviation value sequence is searched for setting the first temperature information.

[0010] In this solution, according to the first temperature information, a first current ratio sequence is obtained according to a preset second sorting method, specifically: Obtaining first temperature difference information according to a difference between the first temperature information and preset target operating temperature information; According to the temperature difference information, a first temperature difference sequence is obtained in ascending order; According to the first temperature difference sequence and a preset output ratio configuration strategy, a first current ratio sequence is obtained.

[0011] In this solution, the first current information of the voltage series combination is obtained according to the set first target current information and the first current ratio sequence, specifically: According to the set first target current information and the first current ratio sequence, second current information of the first voltage series combination is obtained; Determine a first current threshold value according to first temperature information of the first voltage series combination; determining whether the second current information exceeds the first current threshold; If yes, setting the first current information of the first voltage series combination according to the first current threshold value, and updating the first current ratio sequence; If not, the first current information of the first voltage series combination is set according to the second current information, and the first current information of the next voltage series combination is continued to be set.

[0012] A second aspect of the present invention provides a series-parallel management system for an integrated energy storage device, the system comprising: Processor, battery connection module, current limiting control module and temperature detection module; The processor is used to adjust the series and parallel connection of the batteries through the battery connection module and set the power supply current in the battery series combination according to the temperature value of the batteries; The battery connection module is used to adjust the series and parallel connection of the batteries; The current limiting control module is used to adjust the power supply current of the battery; The temperature detection module is used to detect the temperature value of the battery.

[0013] In this solution, the battery connection module is specifically: It includes an analog connection switch unit, which is used to control the series-parallel state or disconnection state of the corresponding battery by switching the state of the analog switch.

[0014] In this solution, the current limiting control module is specifically: It includes a current limiting control unit, which is used to control the power supply output current of the battery by adjusting the resistance value of the feedback resistor of the current limiting control unit.

[0015] The present invention provides a series-parallel management method and system for an energy storage integrated machine. First, according to the first voltage information of each battery in the energy storage integrated machine, a first voltage sequence is obtained according to a preset first sorting method; according to the first target voltage information required by the load, the first voltage sequence is grouped according to a preset grouping method to obtain at least two voltage series combinations; then, according to the temperature information of the battery, first temperature information of the voltage series combination is obtained, which is used to obtain a first current ratio sequence according to a preset second sorting method; finally, according to the first target current information required by the load and the first current ratio sequence, first current information of the voltage series combination is obtained; the present invention meets the power voltage demand of the load by intelligently switching the series-parallel state of the battery of the energy storage integrated machine, and then intelligently adjusts the current value of each series combination according to the temperature information of the battery, thereby improving the service life and safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope.

[0017] Figure 1 A flow chart of a series-parallel management method of an energy storage integrated device of the present invention is shown; Figure 2 A grouping flow chart of voltage series combination provided by an embodiment of the present invention is shown; Figure 3A calculation flow chart of the first temperature information provided by an embodiment of the present invention is shown; Figure 4 A block diagram of a series-parallel management system of an integrated energy storage device of the present invention is shown. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention are explicitly defined in this way.

[0020] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the method of the embodiment of the present invention are not necessarily carried out in order. On the contrary, various steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a step or several steps can be removed from these processes.

[0021] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0022] Figure 1 A flow chart of a series-parallel management method of an integrated energy storage device of the present invention is shown.

[0023] like Figure 1 As shown, the first aspect of the present invention discloses a series-parallel management method of an energy storage integrated device, the method comprising: S102, obtaining first voltage information; S104, obtaining a first voltage sequence according to the first voltage information and a preset first sorting method; S106, grouping the first voltage sequence according to the set first target voltage information in a preset grouping manner to obtain at least two voltage series combinations; S108, acquiring first temperature information based on the voltage series combination; S110, obtaining a first current ratio sequence according to the first temperature information and a preset second sorting method; S112, obtaining first current information of the voltage series combination according to the set first target current information and the first current proportion sequence.

[0024] It should be noted that the energy storage device is provided with a number of batteries, and a battery group is first formed by connecting at least one battery in series, so that the power supply voltage of the battery group meets the load demand; and then at least two battery groups are connected in parallel, and the output currents of the two battery groups are superimposed, so that the power supply current of the energy storage device meets the load demand. Among them, the first voltage information is the voltage value of each battery in the energy storage device; the first voltage sequence is the voltage sequence after the voltage values ​​of each battery in the energy storage device are arranged in a preset order; the first target voltage information is the power supply voltage value required by the load of the energy storage device; the voltage series combination is a battery group formed by at least one battery in series; the first temperature information is the calculated temperature value of the battery group, which is used to indicate the overall temperature of the battery group; the first current ratio sequence is a sequence composed of the ratios of the power supply current required to be provided by each battery group; the first target current information is the power supply current value required by the load of the energy storage device; the first current information is the current value required to be provided when the battery group is powered on.

[0025] In this embodiment, first, according to the first voltage information of each battery in the energy storage integrated machine, the batteries are arranged in ascending or descending order to obtain a sequence of battery voltages, namely, a first voltage sequence. Secondly, the batteries of the energy storage integrated machine are grouped according to a preset grouping method, namely, the voltage values ​​in the first voltage sequence are selected and superimposed until the superimposed voltage value exceeds the first target voltage information; corresponding to the actual operation of connecting the batteries in series until the voltage of the battery group after series connection exceeds the power supply voltage required by the load, the battery group composed of batteries in the same series circuit is identified as a voltage series combination. The voltage values ​​in the first voltage sequence are divided into at least two voltage series combinations; that is, the batteries in the energy storage integrated machine are combined into at least two battery groups; the battery groups superimpose the output current in parallel to jointly provide the power supply current for the load. Then, according to the temperature information of each battery in the battery group, according to the set calculation method, the temperature calculation value of the battery group is obtained, namely, the first temperature information, which is used to represent the overall temperature of the battery group. According to the temperature value of the battery group, the output current of each battery group is set to achieve a state of balancing the heat generation between each battery group, thereby improving the service life of the battery. Therefore, the first temperature information is compared with the reference operating temperature of the battery, and is arranged in ascending or descending order to obtain a first current ratio sequence to represent the output current ratio required by each battery pack. Finally, according to the power supply current required by the load, that is, the first target current information, the current value required to be output by each battery pack is calculated according to the output current ratio of the battery pack. This embodiment meets the power voltage demand of the load by intelligently switching the series and parallel states of the batteries of the energy storage integrated machine, and then intelligently adjusts the current value of each voltage series combination according to the temperature information of the battery, thereby improving the life and safety of the battery.

[0026] Figure 2 A grouping flow chart of voltage series combination provided by an embodiment of the present invention is shown.

[0027] According to an embodiment of the present invention, Figure 2 As shown, according to the set first target voltage information, the first voltage sequence is grouped in a preset grouping manner to obtain at least two voltage series combinations, specifically: S202, establishing a first voltage series combination based on second voltage information of the first voltage sequence, and updating the first voltage sequence; S204, calculating a difference between the second voltage information and the first target voltage information to obtain second target voltage information; S206, determining whether the second target voltage information is greater than 0; S208, if yes, completing the grouping operation of the first voltage series combination; S210, if not, completing the grouping operation of the first voltage series combination according to the first voltage sequence and the second target voltage information and a preset grouping method; S212, obtaining third voltage information according to the first voltage sequence; S214, determining whether the third voltage information is lower than the first target voltage information; S216, if yes, then end the grouping operation; S218: If not, continue to perform the grouping operation.

[0028] It should be noted that the second voltage information is the maximum value in the first voltage sequence; the first voltage series combination is a series battery group of the energy storage integrated machine; and the third voltage information is the sum of the voltage values ​​in the first voltage sequence.

[0029] As an implementation method, the battery pack is grouped according to selecting the maximum value in the voltage sequence to form a first voltage series combination. If the total voltage value of the first voltage series combination exceeds the target voltage value, it means that the combination is completed. Otherwise, it is necessary to select other voltage values ​​from the voltage sequence and add them to the first voltage series combination. In this embodiment, first, a battery pack is created according to the maximum value in the first voltage sequence, that is, the second voltage information; and the second voltage information is removed from the first voltage sequence. Secondly, the difference between the second voltage information and the first target voltage information is calculated, that is, the difference between the voltage value in the battery pack and the load power supply voltage, to obtain the second target voltage information; then, the second target voltage information represents the difference between the voltage value in the battery pack and the power supply voltage required by the load. It is determined whether the second target voltage information is greater than 0. If so, it means that the voltage value in the battery pack meets the power supply voltage requirement required by the load. At this time, it can be determined that the grouping operation of the first series combination has been completed; if not, it means that the voltage value in the battery pack does not meet the power supply requirement required by the load, and it is necessary to continue to group according to the first voltage sequence, that is, it is necessary to connect other batteries in the first voltage sequence in series into the battery pack until the voltage value of the battery pack reaches the power supply voltage required by the load. Finally, after completing the grouping of a battery group, calculate the sum of the voltage values ​​of the updated first voltage sequence to obtain the third voltage information; determine whether the third voltage information exceeds the first target voltage information; if so, it means that the batteries in the first voltage sequence can still be combined in series to obtain a battery group that meets the load power supply voltage, and at this time, continue to perform the grouping operation; if not, it means that the voltage of the remaining batteries no longer meets the load power supply voltage requirement, and no battery group will be set up; the unallocated batteries can be used as backup batteries and can be connected in series to the existing battery group as needed.

[0030] According to an embodiment of the present invention, the grouping operation of the first voltage series combination is completed according to the first voltage sequence and the second target voltage information and a preset grouping method, specifically: According to the first voltage sequence, determining whether there is a voltage value exceeding the second target voltage information; If yes, obtaining fourth voltage information according to the first voltage information; Setting the fourth voltage information in the first voltage series combination, updating the first voltage sequence, and ending the grouping operation of the first voltage series combination; If not, setting the maximum value of the first voltage sequence to the first voltage series combination; updating the second target voltage information and the first voltage sequence according to a difference between a maximum value of the first voltage sequence and the second target voltage information; The grouping operation of the first voltage series combination continues to be performed according to the first voltage sequence and the second target voltage information.

[0031] It should be noted that the fourth voltage information is the minimum value of the voltage value in the first voltage sequence that is greater than the second target voltage information. As an implementation, the battery pack adds a battery member based on selecting the maximum value in the voltage sequence and combining it with other voltage values ​​in the sequence until the sum of the combined voltage values ​​is greater than the target voltage value, and the sum of the voltage values ​​is the minimum value among various combinations. First, search for voltage values ​​in the first voltage sequence to determine whether there is a voltage value that exceeds the second target voltage information; if so, it means that there is a battery in the first voltage sequence that is connected in series with the first voltage series combination, so that the voltage value of the battery group meets the load demand, that is, the first voltage series combination can complete the grouping operation. At this time, first find out the minimum value greater than the second target voltage information according to the first voltage sequence, that is, the fourth voltage information, and then connect the battery corresponding to the fourth voltage information in series with the battery group corresponding to the first voltage series combination, and remove the fourth voltage information from the first voltage sequence; if not, it means that at least 2 voltages in the first voltage sequence need to be connected in series with the first voltage series combination to meet the load demand. At this time, first select the battery corresponding to the maximum value in the current first voltage sequence and connect it in series with the battery group corresponding to the first voltage series combination, then update the second target voltage information according to the above maximum value and remove the above maximum value from the first voltage sequence, and finally continue to perform the grouping operation of the first voltage series combination until the voltage value of the battery group meets the power supply voltage requirement of the load.

[0032] Figure 3 A calculation flow chart of the first temperature information provided by an embodiment of the present invention is shown.

[0033] According to an embodiment of the present invention, Figure 3As shown, the first temperature information is obtained based on the voltage series combination, specifically: S302, acquiring second temperature information based on the voltage series combination; S304, obtaining a first temperature sequence according to the second temperature information; S306: Obtain first temperature information according to the first temperature sequence and a preset weighted average algorithm or a preset deviation value extraction algorithm.

[0034] It should be noted that the second temperature information is the temperature value of each battery in the battery pack. In this embodiment, based on the battery temperature value in each battery pack, the first temperature information is obtained according to the set calculation method to represent the overall temperature value of the battery pack. The temperature value of each battery in the battery pack is measured to obtain a first temperature sequence. As an embodiment, according to the weighted average algorithm, the temperature data of the first temperature sequence is filtered and averaged to obtain a weighted average value as the first temperature information of the battery pack. As another embodiment, according to the extraction of the deviation value, the first temperature information of the battery pack is obtained by comparing the size of the deviation value.

[0035] According to an embodiment of the present invention, the first temperature information is obtained according to the first temperature sequence and a preset deviation value extraction algorithm, specifically: Based on the first temperature sequence, selecting third temperature information in sequence; sequentially calculating the difference between the third temperature information and the temperature values ​​in the first temperature sequence to obtain a first deviation value; Calculating the sum of the absolute values ​​of the first deviation values ​​to obtain a second deviation value; According to the second deviation value, a first deviation value sequence is obtained; The third temperature information corresponding to the minimum value in the first deviation value sequence is searched for setting the first temperature information.

[0036] It should be noted that the third temperature information is any temperature value of the first temperature sequence. As an implementation method, the third temperature information is selected in sequence based on the first temperature sequence, and the sum of the deviation values ​​of the third temperature information and other temperature values ​​in the sequence is calculated, wherein the third temperature information with the smallest sum of deviation values ​​is used to set the first temperature information. In this embodiment, first, the third temperature information in the first temperature sequence is selected in sequence. Secondly, the deviation value of the third temperature information to the temperature value in the first temperature sequence is calculated to obtain the first deviation value. Then, the sum of the absolute values ​​of the first deviation values ​​is calculated to obtain the second deviation value; wherein the second deviation value represents the degree of deviation between the third temperature information and the temperature value in the first temperature sequence, and the smaller the second deviation value, the smaller the deviation. Finally, the first deviation sequence is obtained according to the second deviation value, and the minimum value is found in the first deviation sequence. At this time, the third temperature information corresponding to the above minimum value is used to set the first temperature information.

[0037] According to an embodiment of the present invention, according to the first temperature information, a first current ratio sequence is obtained according to a preset second sorting method, specifically: Obtaining first temperature difference information according to a difference between the first temperature information and preset target operating temperature information; According to the temperature difference information, a first temperature difference sequence is obtained in ascending order; According to the first temperature difference sequence and a preset output ratio configuration strategy, a first current ratio sequence is obtained.

[0038] It should be noted that since the power supply current of the battery pack directly affects the heat generated by the battery pack, the power supply current of the battery pack is controlled to balance the temperature conditions between the battery packs. In this embodiment, first, the difference between the battery pack temperature value and the target operating temperature information is calculated to obtain the first temperature difference information, and then the first temperature difference sequence is obtained in ascending order; wherein the target operating temperature information is the preset theoretical operating temperature of the battery. According to the first temperature difference sequence, according to the preset output ratio configuration strategy, the first current ratio sequence is obtained; wherein, the smaller the temperature difference value, the larger the corresponding current ratio.

[0039] According to an embodiment of the present invention, the first current information of the voltage series combination is obtained according to the set first target current information and the first current ratio sequence, specifically: According to the set first target current information and the first current ratio sequence, second current information of the first voltage series combination is obtained; Determine a first current threshold value according to first temperature information of the first voltage series combination; determining whether the second current information exceeds the first current threshold; If yes, setting the first current information of the first voltage series combination according to the first current threshold value, and updating the first current ratio sequence; If not, the first current information of the first voltage series combination is set according to the second current information, and the first current information of the next voltage series combination is continued to be set.

[0040] It should be noted that the second current information is the theoretical value of the output current of the battery pack calculated according to the first current ratio sequence. In this embodiment, the preset current threshold corresponding table is searched according to the first temperature information of the battery pack to obtain the first current threshold corresponding to the first voltage series combination, which is used to prevent the battery pack from outputting high current at high temperature and causing continuous heating. It is determined whether the second current information exceeds the first current threshold. If so, it means that the calculated value is higher than the upper limit value. At this time, the first current information of the first voltage series combination is set according to the first current threshold value, and after removing the current battery group, the first current ratio sequence is recalculated and updated; if not, it means that the calculated value is lower than the upper limit value. At this time, the first current information of the first voltage series combination is set according to the second current information, and the first current information of the next voltage series combination is continued to be set.

[0041] It is worth mentioning that it also includes: Acquiring third temperature information; Determining whether the third temperature information exceeds a preset over-temperature threshold; If yes, disconnect the power supply connection state of the corresponding battery; And according to the first voltage information of the corresponding battery, the grouping of the voltage series combination is adjusted.

[0042] It should be noted that the third temperature information is the real-time temperature value of any battery in the energy storage device. When the temperature value of the battery exceeds the preset over-temperature threshold, it is necessary to disconnect the power supply connection state of the current battery and stop the power supply output or charging input of the battery. In addition, if the current battery is in any battery pack, the battery that is not connected in series to the battery pack will replace the current battery, or the power supply connection state of the current battery pack will be disconnected.

[0043] It is worth mentioning that it also includes: Acquire first quantity information of a first voltage series combination; Determining whether the first quantity information exceeds a preset quantity threshold; If so, the power supply connection state of the batteries in the first voltage series combination is disconnected.

[0044] It should be noted that the first quantity information is the number of batteries connected in series in the same battery pack. When the first quantity information exceeds the preset quantity threshold, it means that the power of the batteries in the battery pack is at a low state. In order to avoid the battery life being affected by excessive discharge, the power supply connection state of the current battery pack is disconnected at this time.

[0045] Figure 4 A block diagram of a series-parallel management system of an integrated energy storage device of the present invention is shown.

[0046] like Figure 4 As shown, the second aspect of the present invention discloses a series-parallel management system of an energy storage integrated machine, the system comprising: Processor 401, battery connection module 402, current limiting control module 403 and temperature detection module 404; The processor 401 is used to adjust the series and parallel connection of the batteries through the battery connection module and set the power supply current in the battery series combination according to the temperature value of the batteries; The battery connection module 402 is used to adjust the series and parallel connection of the batteries; The current limiting control module 403 is used to adjust the power supply current of the battery; The temperature detection module 404 is used to detect the temperature value of the battery.

[0047] It should be noted that the processor serves as the data processing center and control center of the series-parallel management system of the energy storage device. It is used to control the battery connection module according to the battery voltage value and the target voltage value, so that the batteries are connected in series into several battery groups; then the temperature value of the battery is obtained according to the temperature detection module, which is used to calculate the temperature value of the battery group, and the power supply current value is calculated for the battery group according to the temperature value of the battery group, and then the current output of the battery group is set through the current limiting control module.

[0048] According to an embodiment of the present invention, the battery connection module is specifically: It includes an analog connection switch unit, which is used to control the series-parallel state or disconnection state of the corresponding battery by switching the state of the analog switch.

[0049] It should be noted that each battery is provided with a number of analog switch units, and the power supply conduction state or the series-parallel connection state of each battery is controlled by the analog switch units.

[0050] According to an embodiment of the present invention, the current limiting control module is specifically: It includes a current limiting control unit, which is used to control the power supply output current of the battery by adjusting the resistance value of the feedback resistor of the current limiting control unit.

[0051] It should be noted that each battery is provided with a current limiting control unit, wherein the current limiting control unit is provided with a feedback resistor, and the resistance value of the feedback resistor is adjusted to adjust the current value output by the current limiting control unit, so as to achieve the purpose of controlling the output current of the battery pack.

[0052] The present invention provides a series-parallel management method and system for an energy storage integrated machine. First, according to the first voltage information of each battery in the energy storage integrated machine, a first voltage sequence is obtained according to a preset first sorting method; according to the first target voltage information required by the load, the first voltage sequence is grouped according to a preset grouping method to obtain at least two voltage series combinations; then, according to the temperature information of the battery, first temperature information of the voltage series combination is obtained, which is used to obtain a first current ratio sequence according to a preset second sorting method; finally, according to the first target current information required by the load and the first current ratio sequence, first current information of the voltage series combination is obtained; the present invention meets the power voltage demand of the load by intelligently switching the series-parallel state of the battery of the energy storage integrated machine, and then intelligently adjusts the current value of each series combination according to the temperature information of the battery, thereby improving the service life and safety of the battery.

[0053] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A series-parallel management method for an integrated energy storage device, characterized in that: The method comprises: Acquiring first voltage information; Obtaining a first voltage sequence according to the first voltage information and in a preset first sorting manner; According to the set first target voltage information, the first voltage sequence is grouped in a preset grouping manner to obtain at least two voltage series combinations; Based on the voltage series combination, obtaining first temperature information; According to the first temperature information, a first current ratio sequence is obtained according to a preset second sorting method; The first current information of the voltage series combination is obtained according to the set first target current information and the first current ratio sequence.

2. A series-parallel management method for an integrated energy storage device according to claim 1, characterized in that: The first voltage sequence is grouped according to the set first target voltage information in a preset grouping manner to obtain at least two voltage series combinations, specifically: Based on the second voltage information of the first voltage sequence, a first voltage series combination is established, and the first voltage sequence is updated; Calculating a difference between the second voltage information and the first target voltage information to obtain second target voltage information; Determining whether the second target voltage information is greater than 0; If yes, the grouping operation of the first voltage series combination is completed; If not, completing the grouping operation of the first voltage series combination according to the first voltage sequence and the second target voltage information and a preset grouping method; Obtaining third voltage information according to the first voltage sequence; determining whether the third voltage information is lower than the first target voltage information; If yes, the grouping operation ends; If not, continue with the grouping operation.

3. A series-parallel management method for an integrated energy storage device according to claim 2, characterized in that: The grouping operation of the first voltage series combination is completed according to the first voltage sequence and the second target voltage information and a preset grouping method, specifically: According to the first voltage sequence, determining whether there is a voltage value exceeding the second target voltage information; If yes, obtaining fourth voltage information according to the first voltage information; Setting the fourth voltage information in the first voltage series combination, updating the first voltage sequence, and ending the grouping operation of the first voltage series combination; If not, setting the maximum value of the first voltage sequence to the first voltage series combination; updating the second target voltage information and the first voltage sequence according to a difference between a maximum value of the first voltage sequence and the second target voltage information; The grouping operation of the first voltage series combination continues to be performed according to the first voltage sequence and the second target voltage information.

4. The series-parallel management method of an integrated energy storage device according to claim 1, characterized in that: The acquiring the first temperature information based on the voltage series combination is specifically: Based on the voltage series combination, obtaining second temperature information; Obtaining a first temperature sequence according to the second temperature information; According to the first temperature sequence, the first temperature information is obtained according to a preset weighted average algorithm or a preset deviation value extraction algorithm.

5. A series-parallel management method for an integrated energy storage device according to claim 4, characterized in that: According to the first temperature sequence, the first temperature information is obtained according to a preset deviation value extraction algorithm, specifically: Based on the first temperature sequence, selecting third temperature information in sequence; sequentially calculating the difference between the third temperature information and the temperature values ​​in the first temperature sequence to obtain a first deviation value; Calculating the sum of the absolute values ​​of the first deviation values ​​to obtain a second deviation value; According to the second deviation value, a first deviation value sequence is obtained; The third temperature information corresponding to the minimum value in the first deviation value sequence is searched for setting the first temperature information.

6. The series-parallel management method of an integrated energy storage device according to claim 1, characterized in that: According to the first temperature information, a first current ratio sequence is obtained according to a preset second sorting method, specifically: Obtaining first temperature difference information according to a difference between the first temperature information and preset target operating temperature information; According to the temperature difference information, a first temperature difference sequence is obtained in ascending order; According to the first temperature difference sequence and a preset output ratio configuration strategy, a first current ratio sequence is obtained.

7. The series-parallel management method of an integrated energy storage device according to claim 1, characterized in that: According to the set first target current information and the first current ratio sequence, the first current information of the voltage series combination is obtained, specifically: According to the set first target current information and the first current ratio sequence, second current information of the first voltage series combination is obtained; Determine a first current threshold value according to first temperature information of the first voltage series combination; determining whether the second current information exceeds the first current threshold; If yes, setting the first current information of the first voltage series combination according to the first current threshold value, and updating the first current ratio sequence; If not, the first current information of the first voltage series combination is set according to the second current information, and the first current information of the next voltage series combination is continued to be set.

8. A series-parallel management system for an integrated energy storage device, applied to a series-parallel management method for an integrated energy storage device as claimed in any one of claims 1 to 7, characterized in that: The system comprises: Processor, battery connection module, current limiting control module and temperature detection module; The processor is used to adjust the series and parallel connection of the batteries through the battery connection module and set the power supply current in the battery series combination according to the temperature value of the batteries; The battery connection module is used to adjust the series and parallel connection of the batteries; The current limiting control module is used to adjust the power supply current of the battery; The temperature detection module is used to detect the temperature value of the battery.

9. A series-parallel management system for an integrated energy storage device according to claim 8, characterized in that: The battery connection module is specifically: It includes an analog connection switch unit, which is used to control the series-parallel state or disconnection state of the corresponding battery by switching the state of the analog switch.

10. The series-parallel management system of an integrated energy storage device according to claim 8, characterized in that: The current limiting control module is specifically: It includes a current limiting control unit, which is used to control the power supply output current of the battery by adjusting the resistance value of the feedback resistor of the current limiting control unit.

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