A series-parallel management method and system for an integrated energy storage device

Abstract

The present invention provides a series-parallel management method and system for an integrated energy storage device. First, according to the first voltage information of each battery in the integrated energy storage device, 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, the first temperature information of the voltage series combination is obtained according to the temperature information of the battery, and 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, the first current information of the voltage series combination is obtained. The present invention intelligently switches the series-parallel state of the batteries of the integrated energy storage device to meet the power supply voltage requirements of the load, and then intelligently adjusts the current values of each series combination according to the temperature information of the batteries, thereby improving the service life and safety of the batteries.

Description

Technical Field

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

[0002] An integrated energy storage device is an energy storage device that highly integrates a battery energy storage system, an energy conversion system, and an intelligent control system, achieving efficient energy storage and utilization. As one of the core components of the integrated energy storage device, the battery pack can store excess electric energy and release it when needed, thus balancing the supply and demand relationship of the power grid. This device not only improves the utilization rate of electric energy but also effectively alleviates the energy shortage problem caused by power demand fluctuations.

[0003] An integrated energy storage device usually consists of several batteries; a series group is formed by connecting multiple batteries in series so that the voltage of the series group meets the power supply requirements of the load; by connecting multiple series groups in parallel, the currents of each series group are superimposed to meet the power consumption requirements 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 batteries to meet the power supply requirements of the load while taking 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 integrated energy storage device. First, the voltage values of each battery are arranged into a first voltage sequence, and at least two voltage series combinations are generated according to the first voltage sequence in accordance with the voltage requirements of the load; then, the first temperature information of the voltage series combination is calculated based on the temperature value of the battery, and a 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, according to the current required by the load and the first current ratio sequence, the current values required for each voltage series combination are adjusted; by intelligently switching the series-parallel state of the batteries of the integrated energy storage device, the present invention meets the power supply voltage requirements of the load, and then intelligently adjusts the current values of each series combination according to the temperature information of the battery, improving the service life and safety of battery use.

[0005] The first aspect of the present invention provides a series-parallel management method for an integrated energy storage device, the method comprising:

[0006] Obtain first voltage information;

[0007] According to the first voltage information, obtain a first voltage sequence according to a preset first sorting method;

[0008] According to the set first target voltage information, group the first voltage sequence according to a preset grouping method to obtain at least two voltage series combinations;

[0009] Obtain the first temperature information based on the voltage series combination;

[0010] According to the first temperature information, obtain the first current ratio sequence according to the preset second sorting method;

[0011] According to the set first target current information and the first current ratio sequence, obtain the first current information of the voltage series combination.

[0012] In this solution, the first voltage sequence is grouped according to the set first target voltage information according to the preset grouping method to obtain at least two voltage series combinations, specifically:

[0013] Based on the second voltage information of the first voltage sequence, establish the first voltage series combination and update the first voltage sequence;

[0014] Calculate the difference between the second voltage information and the first target voltage information to obtain the second target voltage information;

[0015] Judge whether the second target voltage information is greater than 0;

[0016] If so, complete the grouping operation of the first voltage series combination;

[0017] If not, according to the first voltage sequence and the second target voltage information, complete the grouping operation of the first voltage series combination according to the preset grouping method;

[0018] Obtain the third voltage information according to the first voltage sequence;

[0019] Judge whether the third voltage information is lower than the first target voltage information;

[0020] If so, end the grouping operation;

[0021] If not, continue to perform the grouping operation.

[0022] 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 according to the preset grouping method, specifically:

[0023] Judge whether there is a voltage value exceeding the second target voltage information according to the first voltage sequence;

[0024] If so, obtain the fourth voltage information according to the first voltage information;

[0025] Set the fourth voltage information in the first voltage series combination, update the first voltage sequence, and end the grouping operation of the first voltage series combination;

[0026] Otherwise, set the maximum value of the first voltage sequence in the first voltage series combination;

[0027] Update the second target voltage information and the first voltage sequence according to the difference between the maximum value of the first voltage sequence and the second target voltage information;

[0028] Continue to perform the grouping operation of the first voltage series combination according to the first voltage sequence and the second target voltage information.

[0029] In this solution, obtaining the first temperature information based on the voltage series combination specifically includes:

[0030] Obtain the second temperature information based on the voltage series combination;

[0031] Obtain the first temperature sequence according to the second temperature information;

[0032] Obtain the first temperature information according to the first temperature sequence according to the preset weighted average algorithm or the preset deviation value extraction algorithm.

[0033] In this solution, obtaining the first temperature information according to the preset deviation value extraction algorithm based on the first temperature sequence specifically includes:

[0034] Based on the first temperature sequence, sequentially select the third temperature information;

[0035] Sequentially calculate the difference between the third temperature information and the temperature values in the first temperature sequence to obtain the first deviation value;

[0036] Calculate the sum of the absolute values of the first deviation value to obtain the second deviation value;

[0037] Obtain the first deviation value sequence according to the second deviation value;

[0038] Find the third temperature information corresponding to the minimum value in the first deviation value sequence for setting the first temperature information.

[0039] In this solution, obtaining the first current ratio sequence according to the preset second sorting method based on the first temperature information specifically includes:

[0040] Obtain the first temperature difference information according to the difference between the first temperature information and the preset target working temperature information;

[0041] Obtain the first temperature difference sequence in ascending order according to the temperature difference information;

[0042] Obtain the first current ratio sequence according to the first temperature difference sequence according to the preset output ratio configuration strategy.

[0043] In this solution, 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 as follows:

[0044] Obtain the second current information of the first voltage series combination according to the set first target current information and the first current ratio sequence;

[0045] Determine the first current threshold according to the first temperature information of the first voltage series combination;

[0046] Judge whether the second current information exceeds the first current threshold;

[0047] If so, set the first current information of the first voltage series combination according to the first current threshold and update the first current ratio sequence;

[0048] If not, set the first current information of the first voltage series combination according to the second current information and continue to set the first current information of the next voltage series combination.

[0049] The second aspect of the present invention provides a series-parallel management system for an energy storage integrated machine, and the system includes:

[0050] A processor, a battery connection module, a current limiting control module, and a temperature detection module;

[0051] The processor is used to adjust the series-parallel situation of the battery according to the battery connection module and set the supply current in the battery series combination according to the temperature value of the battery;

[0052] The battery connection module is used to adjust the series-parallel situation of the battery;

[0053] The current limiting control module is used to adjust the supply current of the battery;

[0054] The temperature detection module is used to detect the temperature value of the battery.

[0055] In this solution, the battery connection module is specifically:

[0056] It includes an analog connection switch unit for controlling the series-parallel state or disconnection state of the corresponding battery by switching the state of the analog switch.

[0057] In this solution, the current limiting control module is specifically:

[0058] It includes a current limiting control unit for controlling the supply output current of the battery by adjusting the feedback resistance value of the current limiting control unit.

[0059] The present invention provides a series-parallel management method and system for an integrated energy storage machine. First, according to the first voltage information of each battery in the integrated energy storage 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, the first temperature information of the voltage series combination is obtained according to the temperature information of the battery, and 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, the first current information of the voltage series combination is obtained. By intelligently switching the series-parallel state of the batteries of the integrated energy storage machine, the present invention meets the power supply voltage requirements of the load, and then intelligently adjusts the current values of each series combination according to the temperature information of the batteries, improving the service life and safety of the batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] 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 some embodiments of the present invention and should not be regarded as limiting the scope.

[0061] Figure 1 The flowchart of a series-parallel management method for an integrated energy storage machine according to the present invention is shown;

[0062] Figure 2 The flowchart of the grouping of the voltage series combination provided by the embodiment of the present invention is shown;

[0063] Figure 3 The flowchart of the calculation of the first temperature information provided by the embodiment of the present invention is shown;

[0064] Figure 4 The block diagram of a series-parallel management system for an integrated energy storage machine according to the present invention is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0065] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0066] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the embodiments of the present invention.

[0067] The "first", "second" and similar terms used in the embodiments of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similar terms such as "a", "an" or "the" do not denote a quantity limitation either, but mean that there is at least one. Similarly, terms such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the methods of the embodiments of the present invention do not necessarily need to be carried out precisely in sequence. On the contrary, they can be carried out in reverse order or various steps can be processed simultaneously. At the same time, other operations can also be added to these processes, or one or several steps can be removed from these processes.

[0068] In addition, in each embodiment of the present invention, the functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0069] Figure 1 The flowchart of a series-parallel management method for an energy storage integrated machine of the present invention is shown.

[0070] As Figure 1 shown, in a first aspect of the present invention, a series-parallel management method for an energy storage integrated machine is disclosed, and the method includes:

[0071] S102, obtaining first voltage information;

[0072] S104, according to the first voltage information, obtaining a first voltage sequence according to a preset first sorting method;

[0073] S106, according to the set first target voltage information, grouping the first voltage sequence according to a preset grouping method to obtain at least two voltage series combinations;

[0074] S108, based on the voltage series combination, obtaining first temperature information;

[0075] S110. Obtain a first current ratio sequence according to the first temperature information in a preset second sorting manner;

[0076] S112. Obtain the first current information of the voltage series combination according to the set first target current information and the first current ratio sequence.

[0077] It should be noted that the integrated energy storage device is provided with a number of batteries. First, at least one battery is connected in series to form a battery pack so that the supply voltage of the battery pack meets the load requirements; then at least two battery packs are connected in parallel to superimpose the output currents of the two battery packs so that the supply current of the integrated energy storage device meets the load requirements. Among them, the first voltage information is the voltage value of each battery in the integrated energy storage device; the first voltage sequence is the voltage sequence after the voltage values of each battery in the integrated energy storage device are arranged in a preset order; the first target voltage information is the supply voltage value required by the load of the integrated energy storage device; the voltage series combination is a battery pack formed by at least 1 battery connected in series; the first temperature information is the calculated temperature value of the battery pack, which is used to represent the overall temperature of the battery pack; the first current ratio sequence is a sequence composed of the ratios of the supply currents required by each battery pack; the first target current information is the supply current value required by the load of the integrated energy storage device; the first current information is the current value required to be provided when the battery pack supplies power.

[0078] In this embodiment, first, according to the first voltage information of each battery in the integrated energy storage machine, arrange them in ascending or descending order to obtain a sequence of battery voltages, that is, the first voltage sequence. Secondly, group the batteries of the integrated energy storage machine according to a preset grouping method, that is, select the voltage values in the first voltage sequence for superposition until the superposed voltage value exceeds the first target voltage information; corresponding to the actual operation, the batteries are connected in series until the voltage of the series-connected battery pack exceeds the power supply voltage required by the load. At this time, the battery pack composed of the batteries in the same series circuit is regarded as a voltage series combination. Divide the voltage values in the first voltage sequence into at least 2 voltage series combinations; that is to say, combine the batteries in the integrated energy storage machine into at least 2 battery packs; the battery packs output current in parallel to jointly provide power supply current for the load. Then, according to the temperature information of each battery in the battery pack, obtain the temperature calculation value of the battery pack, that is, the first temperature information, according to a set calculation method, which is used to represent the overall temperature of the battery pack. Set the output current of each battery pack according to the temperature value of the battery pack to achieve a state of balancing the heat generation between the battery packs, thereby improving the service life of the battery. Therefore, compare the first temperature information with the reference operating temperature of the battery, and after arranging them in ascending or descending order, obtain the first current ratio sequence, which is used 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, calculate the current values required to be output by each battery pack according to the output current ratio of the battery pack. In this embodiment, by intelligently switching the series-parallel states of the batteries of the integrated energy storage machine to meet the power supply voltage requirements of the load, and then according to the temperature information of the batteries, intelligently adjust the current values of each voltage series combination to improve the service life and safety of the batteries.

[0079] Figure 2 Fig. shows the grouping flowchart of the voltage series combination provided by the embodiment of the present invention.

[0080] According to the embodiment of the present invention, as Figure 2 shown, according to the set first target voltage information, group the first voltage sequence according to a preset grouping method to obtain at least 2 voltage series combinations. Specifically:

[0081] S202, based on the second voltage information of the first voltage sequence, establish a first voltage series combination and update the first voltage sequence;

[0082] S204, calculate the difference between the second voltage information and the first target voltage information to obtain the second target voltage information;

[0083] S206, determine whether the second target voltage information is greater than 0;

[0084] S208, if so, complete the grouping operation of the first voltage series combination;

[0085] S210, if not, then according to the first voltage sequence and the second target voltage information, complete the grouping operation of the first voltage series combination according to a preset grouping method;

[0086] S212, obtain the third voltage information according to the first voltage sequence;

[0087] S214, determine whether the third voltage information is lower than the first target voltage information;

[0088] S216, if so, end the grouping operation;

[0089] S218, if not, then continue to execute the grouping operation.

[0090] 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 pack of an energy storage integrated machine; the third voltage information is the sum of the voltage values in the first voltage sequence.

[0091] As an implementation, the grouping of the battery pack is performed based on 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 indicates that the combination is completed; otherwise, other voltage values need to be selected from the voltage sequence and added to the first voltage series combination. In this embodiment, first, according to the maximum value in the first voltage sequence, that is, the second voltage information, a battery pack is created; and the second voltage information is removed from the first voltage sequence. Secondly, calculate the difference between the second voltage information and the first target voltage information, that is, the difference between the voltage value in the battery pack and the load supply voltage, to obtain the second target voltage information; then, the second target voltage information represents the gap between the voltage value in the battery pack and the supply voltage required by the load. Determine whether the second target voltage information is greater than 0. If so, it indicates that the voltage value in the battery pack meets the supply voltage requirement of the load. At this time, it can be determined that the grouping operation of the first series combination is completed; if not, it indicates that the voltage value in the battery pack does not meet the supply requirement of the load, and grouping needs to be continued according to the first voltage sequence, that is, other batteries in the first voltage sequence need to be connected in series into the battery pack until the voltage value of the battery pack reaches the supply voltage value required by the load. Finally, when the grouping of a battery pack is completed, 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 indicates that the batteries in the first voltage sequence can still obtain a battery pack that meets the load supply voltage through series combination. At this time, continue to perform the grouping operation; if not, it indicates that the voltage of the remaining batteries no longer meets the load supply voltage requirement, and no more battery packs are established; the unassigned batteries are used as backup batteries and can be connected in series to the existing battery packs as needed.

[0092] 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 according to a preset grouping method, specifically:

[0093] According to the first voltage sequence, determine whether there is a voltage value exceeding the second target voltage information;

[0094] If so, obtain the fourth voltage information according to the first voltage information;

[0095] Set the fourth voltage information in the first voltage series combination, and update the first voltage sequence to end the grouping operation of the first voltage series combination;

[0096] If not, set the maximum value of the first voltage sequence in the first voltage series combination;

[0097] Update the second target voltage information and update the first voltage sequence according to the difference between the maximum value of the first voltage sequence and the second target voltage information;

[0098] Continue to perform the grouping operation of the first voltage series combination according to the first voltage sequence and the second target voltage information.

[0099] It should be noted that the fourth voltage information is the minimum value of the voltage values in the first voltage sequence that are greater than the second target voltage information. As an implementation manner, the execution basis for adding battery members to the battery pack is to select the maximum value in the voltage sequence and combine 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 the voltage values in the first voltage sequence and determine whether there are voltage values exceeding the second target voltage information; if so, it means that after a battery in the first voltage sequence is connected in series to the first voltage series combination, the voltage value of the battery pack meets the load requirement, that is, the first voltage series combination can complete the grouping operation. At this time, first find the minimum value greater than the second target voltage information in the first voltage sequence, that is, the fourth voltage information, then connect the battery corresponding to the fourth voltage information in series to the battery pack 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 voltage values in the first voltage sequence need to be connected in series to the first voltage series combination to meet the load requirement. At this time, first connect the battery corresponding to the maximum value in the current first voltage sequence in series to the battery pack 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 pack meets the power supply voltage requirement of the load.

[0100] Figure 3 The flowchart for calculating the first temperature information provided by the embodiment of the present invention is shown.

[0101] According to the embodiment of the present invention, as Figure 3 shown, obtaining the first temperature information based on the voltage series combination specifically includes:

[0102] S302, obtaining second temperature information based on the voltage series combination;

[0103] S304, obtaining a first temperature sequence according to the second temperature information;

[0104] S306, obtaining the first temperature information according to the first temperature sequence according to a preset weighted average algorithm or a preset deviation value extraction algorithm.

[0105] 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 temperature values of the batteries in each battery pack, the first temperature information is obtained according to a set calculation method, which is used to represent the overall temperature value of the battery pack. The temperature values of each battery in the battery pack are measured to obtain the first temperature sequence. As an implementation manner, according to the weighted average algorithm, the temperature data of the first temperature sequence is filtered and averaged to obtain the weighted average value as the first temperature information of the battery pack. As another implementation manner, the deviation value is extracted, and the first temperature information of the battery pack is obtained by comparing the magnitudes of the deviation values.

[0106] According to the embodiment of the present invention, according to the first temperature sequence, the first temperature information is obtained according to a preset deviation value extraction algorithm, specifically:

[0107] Based on the first temperature sequence, the third temperature information is sequentially selected;

[0108] The difference between the third temperature information and the temperature value in the first temperature sequence is sequentially calculated to obtain the first deviation value;

[0109] The sum of the absolute values of the first deviation values is calculated to obtain the second deviation value;

[0110] According to the second deviation value, a first deviation value sequence is obtained;

[0111] The third temperature information corresponding to the minimum value in the first deviation value sequence is found, which is used to set the first temperature information.

[0112] It should be noted that the third temperature information is any temperature value of the first temperature sequence. As an implementation manner, based on the first temperature sequence, the third temperature information is sequentially selected, and the total deviation value between the third temperature information and other temperature values in the sequence is calculated. Among them, the third temperature information with the smallest total deviation value is used to set the first temperature information. In this embodiment, first, the third temperature information in the first temperature sequence is sequentially selected. Secondly, the deviation value of the third temperature information from 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; among them, the second deviation value represents the deviation degree 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, according to the second deviation value, a first deviation sequence is obtained, and the minimum value is found in the first deviation sequence. At this time, according to the third temperature information corresponding to the above minimum value, it is used to set the first temperature information.

[0113] According to the embodiment of the present invention, according to the first temperature information, the first current ratio sequence is obtained according to a preset second sorting method, specifically:

[0114] Obtain first temperature difference information based on the difference between the first temperature information and the preset target operating temperature information;

[0115] Obtain a first temperature difference sequence in ascending order according to the temperature difference information;

[0116] Obtain a first current ratio sequence according to the first temperature difference sequence and the preset output ratio configuration strategy.

[0117] It should be noted that since the supply current of the battery pack directly affects the heat generation of the battery pack, therefore, by controlling the supply current of the battery pack, the temperature conditions between the battery packs are balanced. In this embodiment, first, calculate the difference between the battery pack temperature value and the target operating temperature information to obtain the first temperature difference information, and obtain the first temperature difference sequence 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 and the preset output ratio configuration strategy, the first current ratio sequence; the smaller the temperature difference value, the larger the corresponding current ratio.

[0118] According to the embodiment of the present invention, obtain the first current information of the voltage series combination according to the set first target current information and the first current ratio sequence, specifically:

[0119] Obtain the second current information of the first voltage series combination according to the set first target current information and the first current ratio sequence;

[0120] Determine a first current threshold according to the first temperature information of the first voltage series combination;

[0121] Judge whether the second current information exceeds the first current threshold;

[0122] If so, set the first current information of the first voltage series combination according to the first current threshold and update the first current ratio sequence;

[0123] If not, set the first current information of the first voltage series combination according to the second current information, and continue to set the first current information of the next voltage series combination.

[0124] It should be noted that the second current information is the theoretical output current value of the battery pack calculated according to the first current ratio sequence. In this embodiment, a preset current threshold correspondence 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 still outputting a high current in a high temperature situation and having a continuous heating phenomenon. It is judged 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, and after removing the current battery pack, 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.

[0125] It is worth mentioning that it further includes:

[0126] Obtain the third temperature information;

[0127] Judge whether the third temperature information exceeds a preset over-temperature threshold;

[0128] If so, disconnect the power supply connection state of the corresponding battery;

[0129] And adjust the grouping situation of the voltage series combination according to the first voltage information of the corresponding battery.

[0130] It should be noted that the third temperature information is the real-time temperature value of any battery in the energy storage integrated machine. 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. And, if the current battery is in any battery pack, replace the current battery with a battery that is not connected in series to the battery pack, or disconnect the power supply connection state of the current battery pack.

[0131] It is worth mentioning that it further includes:

[0132] Obtain the first quantity information of the first voltage series combination;

[0133] Judge whether the first quantity information exceeds a preset quantity threshold;

[0134] If so, disconnect the power supply connection state of the batteries in the first voltage series combination.

[0135] It should be noted that the first quantity information is the number of batteries connected in series within 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 in a low state. To prevent the batteries from being affected by over-discharge and affecting their service life, the power supply connection state of the current battery pack is disconnected at this time.

[0136] Figure 4 The block diagram of the series-parallel management system of an energy storage integrated machine according to the present invention is shown.

[0137] As Figure 4 shown, the second aspect of the present invention discloses a series-parallel management system of an energy storage integrated machine, and the system includes:

[0138] a processor 401, a battery connection module 402, a current limiting control module 403, and a temperature detection module 404;

[0139] The processor 401 is used to adjust the series-parallel situation of the battery according to the battery connection module, and set the supply current in the battery series combination according to the temperature value of the battery;

[0140] The battery connection module 402 is used to adjust the series-parallel situation of the battery;

[0141] The current limiting control module 403 is used to adjust the supply current of the battery;

[0142] The temperature detection module 404 is used to detect the temperature value of the battery.

[0143] It should be noted that the processor, as the data processing center and control center of the series-parallel management system of the energy storage integrated machine, is used to control the battery connection module according to the voltage value and target voltage value of the battery, so that the batteries are connected in series into several battery groups; then, according to the temperature value of the battery obtained by the temperature detection module, it is used to calculate the temperature value of the battery group, and calculate the supply current value for the battery group according to the temperature value of the battery group, and then set the current output situation of the battery group through the current limiting control module.

[0144] According to an embodiment of the present invention, the battery connection module specifically is:

[0145] 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.

[0146] It should be noted that several analog switch units are provided for each battery, and the power supply conduction state or series-parallel connection state of each battery is controlled through the analog switch units.

[0147] According to an embodiment of the present invention, the current limiting control module specifically is:

[0148] It includes a current limiting control unit, which is used to control the supply output current of the battery by adjusting the feedback resistance value of the current limiting control unit.

[0149] It should be noted that a current limiting control unit is provided for each battery. Among them, the current limiting control unit is provided with a feedback resistor. By adjusting the resistance value of the feedback resistor, the current value output through the current limiting control unit is adjusted to achieve the purpose of controlling the power supply output current of the battery pack.

[0150] 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, the first temperature information of the voltage series combination is obtained according to the temperature information of the battery, and 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, the first current information of the voltage series combination is obtained; by intelligently switching the series-parallel state of the batteries of the energy storage integrated machine, the present invention meets the power supply voltage requirements of the load, and then intelligently adjusts the current values of each series combination according to the temperature information of the batteries, improving the service life and safety of the batteries.

[0151] If the above-mentioned 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 such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0152] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within 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; Obtaining first current information of the voltage series combination according to the set first target current information and the first current ratio sequence; Acquire first quantity information of a first voltage series combination; Determining whether the first quantity information exceeds a preset quantity threshold; If so, disconnecting the power supply connection state of the batteries in the first voltage series combination; 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: 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 to perform the grouping operation; Wherein, the first current ratio sequence is obtained according to the first temperature information and in accordance with 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; 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.

2. A series-parallel management method for an integrated energy storage device according to claim 1, 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.

3. 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.

4. A series-parallel management method for an integrated energy storage device according to claim 3, 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.

5. 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 4, 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; Wherein, 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; Wherein, 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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