CN218415879U - Mobile energy storage system capable of expanding power - Google Patents
Mobile energy storage system capable of expanding power Download PDFInfo
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- CN218415879U CN218415879U CN202222486883.4U CN202222486883U CN218415879U CN 218415879 U CN218415879 U CN 218415879U CN 202222486883 U CN202222486883 U CN 202222486883U CN 218415879 U CN218415879 U CN 218415879U
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Abstract
The utility model discloses a can expand mobile energy storage system of power relates to portable power source technical field to the energy storage system who solves among the prior art is difficult to the technical problem of compatible different model batteries in order to expand power. The utility model discloses a remove energy storage system includes two at least energy storage modules and middle module. The energy storage modules are provided with a shell, the shell is provided with a handle, the energy storage modules are convenient to lift and place, and the energy storage modules are connected through a middle module; the middle module comprises a discharge power management module, and the discharge power management module comprises a power expansion interface; the discharging power management module is used for controlling the power expansion interface to start when the external load power of the power expansion interface is larger than the rated output power of a single energy storage module, so that the plurality of energy storage modules are connected in parallel and the expansion power is output. The event the utility model has the advantages of the power demand is expanded under compatible strong, the diversified scene of satisfying.
Description
Technical Field
The utility model relates to a portable power source technical field particularly, relates to a can expand mobile energy storage system of power.
Background
At present, most portable energy storage devices are designed integrally, the battery capacity, the rated power and the weight of the portable energy storage devices are fixed, and the portable energy storage devices belong to independent energy storage systems. However, the existing energy storage system has certain limitations in application scenarios such as excess rated power and long endurance maintenance. The mobile energy storage products with high power are usually purchased to meet the scenes, but the common energy storage products meeting the scenes are usually heavier and are only suitable for being installed in fixed places, are not favorable for long-distance carrying, and are poor in portability.
SUMMERY OF THE UTILITY MODEL
An object of this application is to provide a can expand mobile energy storage system of power, its can compatible each energy storage module, in order to realize expanding the demand of power through its connection, have portable, satisfy advantages such as diversified scene demand.
The embodiment of the application is realized as follows:
the first aspect of the embodiment of the application provides a mobile energy storage system capable of expanding power, which comprises at least two energy storage modules and a middle module, wherein the energy storage modules are provided with a shell, and a handle is arranged on the shell. The energy storage modules are connected through the middle module; the middle module comprises a discharge power management module, and the discharge power management module comprises a power expansion interface. The discharging power management module is used for controlling the power expansion interface to start when the external load power of the power expansion interface is larger than the rated output power of a single energy storage module, so that the energy storage modules are connected in parallel and the expanded power is output.
In an embodiment, the discharging power management module further includes a discharging power management unit, and the discharging power management unit is connected to the power expansion interface and configured to control the power expansion interface and the output power.
In one embodiment, the energy storage module is provided with an independent output interface, and the discharge power management module further comprises a discharge power distribution unit connected with the discharge power management unit; the discharge power distribution unit is used for detecting the external load power of the power expansion interface and forbidding the independent output interface when the external load power of the power expansion interface is larger than the rated output power of the single energy storage module.
In one embodiment, the energy storage module includes a battery pack and a main control module. The battery pack is used for storing electric quantity; the main control module is connected with the battery pack and used for controlling other modules in the energy storage module.
In an embodiment, the middle module further includes a capacity expansion module, the capacity expansion module includes a discharging buck-boost unit, and the discharging buck-boost unit is connected with each energy storage module; the discharging voltage increasing and decreasing unit is used for adjusting the output voltage values of other energy storage modules to the input voltage value of the highest efficiency point of the current discharging energy storage module.
In an embodiment, the energy storage module further includes an inverter module, the capacity expansion module is connected to the main control module through the inverter module, and the inverter module is configured to convert the direct current of the battery pack into an alternating current.
In one embodiment, the energy storage module includes a battery management module, and the battery management module is connected to the battery pack and the main control module, and is configured to control a charge/discharge state of the battery pack and prevent overcharge or overdischarge of the battery pack.
In one embodiment, the middle module further comprises an internal charging management module, the internal charging management module comprises a charging buck-boost unit, and the charging buck-boost unit is connected with the battery management module; the energy storage module comprises a first energy storage module and a second energy storage module, and the charging buck-boost unit is used for adjusting the initial voltage value of the second energy storage module to the rated charging voltage value of the first energy storage module when the second energy storage module charges the first energy storage module.
In an embodiment, the middle module further includes an external charging power management module, the external charging power management module includes a charging power distribution unit and an external charging interface, and the charging power distribution unit is connected to the main control module of each energy storage module respectively, and is configured to distribute charging power to each energy storage module when the external charging interface is connected to an external power supply.
In an embodiment, the energy storage module further includes a display and external setting interface module, and the display and external setting interface module is connected to the main control module and is configured to display the remaining power and the input/output power of the energy storage module.
This application compares beneficial effect with prior art:
according to the power expansion output control method and device, through the arrangement of the discharge power management module, when the external load power is larger than the rated output power of a single energy storage module, the power expansion interface is controlled to be started, so that the energy storage modules are connected in parallel, the expansion power is output, and the expansion power discharge output of the mobile energy storage system is achieved. Meanwhile, the handle is arranged on the shell of the energy storage module, so that the energy storage module is convenient to lift and put.
In addition, this application can also satisfy the mutual dilatation of energy storage module, demands such as inside and outside charge-discharge when realizing removing the energy storage module of the compatible different capacity of energy storage system, voltage platform or power through the dilatation module that sets up and be used for inside and outside charge-discharge.
The user can independently use an energy storage module in the mobile energy storage system provided by the application, and the power expansion and long endurance effects of the mobile energy storage system can be realized by combining different energy storage modules according to the application scene requirements.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a mobile energy storage system according to an embodiment of the present application;
fig. 2 is a partial schematic structural diagram of a mobile energy storage system according to an embodiment of the present application, the partial structural diagram being related to a first energy storage module;
fig. 3 is a partial schematic structural diagram of a mobile energy storage system according to an embodiment of the present application, the partial structural diagram being related to a second energy storage module;
fig. 4 is a schematic power expansion discharge flow diagram of a mobile energy storage system according to an embodiment of the present application;
fig. 5 is a schematic expansion discharge flow diagram of a mobile energy storage system according to an embodiment of the present application;
fig. 6 is a schematic diagram illustrating a charging process of a mobile energy storage system according to an embodiment of the present application.
Icon: 1-a mobile energy storage system; 21-a first energy storage module; 22-a second energy storage module; 20-a middle module; 211-A system battery pack; 212-A System BMS + EMS Module; 213-A system main control module; 214-A system inversion module; 215-A system display and external setting interface module; 216-a system AC output interface; 221-B system battery pack; 222-B system BMS + EMS module; 223-B system main control module; 224-B system inversion module; 225-B system display and external setting interface module; 226-B system AC output interface; 201-discharge power management module; 2011-discharge power management unit; 2012-power expansion interface; 2013-A system discharge power distribution unit; 2014-B system discharge power distribution unit; 202-capacity expansion module; 2021-discharge buck-boost unit; 203-external charging power management module; 2031-a charging power distribution unit; 2032 — external charging interface; 204-internal charge management module; a 2041-A system internal DC voltage boosting and reducing unit; a 2042-B system internal DC voltage boosting and reducing unit; 2043-a direct current input output unit; 2044-A system external bidirectional DC input/output interface; 2045-B system external bidirectional DC input/output interface.
Detailed Description
The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are usually placed when products of the application are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a mobile energy storage system 1 capable of expanding power according to an embodiment of the present disclosure. As shown in fig. 1, the present application provides a mobile energy storage system 1 with power expansion, which includes at least two energy storage modules and an intermediate module 20. The energy storage module is provided with a shell, a handle is arranged on the shell, the energy storage module is convenient to lift and place, and the energy storage module can be independently used in respective applicable scenes and is convenient to carry; the energy storage modules of different voltage platforms can also be connected together through the middle module 20 to form a mobile energy storage system 1 capable of meeting the power expansion, in addition, the mobile energy storage system 1 can meet the capacity expansion requirement through the capacity expansion module and other functional modules for internal and external charging and discharging so as to be applied to various application scenes, and the energy storage system can support the energy storage modules included in the energy storage system to be charged simultaneously; or under the condition that no external power supply supports charging, the plurality of energy storage modules included in the system are supported to be charged mutually.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic partial structure diagram of a mobile energy storage system 1 according to an embodiment of the present disclosure; fig. 3 is a partial structural schematic diagram of the mobile energy storage system 1 according to an embodiment of the present application. As shown in fig. 2 and fig. 3, for example, the same mobile energy storage system 1 includes two energy storage modules, which are a first energy storage module 21 and a second energy storage module 22. The first energy storage module 21 is equivalent to a subsystem of the mobile energy storage system 1, and may be a system a shown in the figure; the second energy storage module 22 corresponds to another subsystem of the mobile energy storage system 1, and may be a system B shown in the figure.
In an embodiment, the two energy storage modules (system a and system B) are respectively provided with a battery pack (as shown in system a battery pack 211 or system B battery pack 221), a battery management module (as shown in system a BMS + EMS module 212 or system B BMS + EMS module 222), a main control module (as shown in system a MCU main control module or system B MCU main control module), an inverter module (as shown in system a inverter module 214 or system B inverter module 224), and other basic hardware modules. The battery pack is used for storing electric quantity; the battery management module is connected with the battery pack and is used for system management and electric quantity management of the battery pack, and the battery management module comprises: the battery management module can effectively prolong the service life of the battery and improve the utilization rate of the battery pack; the inversion module is used for converting the direct current of the battery pack into alternating current; the energy storage module can also be provided with an AC-DC module; the main control module is connected with the battery management module and is used for controlling the work of other modules in the energy storage module, such as the input and output of alternating current to direct current, direct current to alternating current or current and voltage.
In one embodiment, the energy storage module further includes an independent output interface (e.g., the a system AC output interface 216 or the B system AC output interface 226) and a display and external setting interface module, where the display and external setting interface module is connected to the main control module and is configured to display working or status parameter information such as remaining power, input/output power, and the like of the corresponding energy storage module. A user can set a specific mode of the energy storage module or the mobile energy storage system 1 during charging or discharging through a display screen or an external interface; and the independent output interface is used for supplying power to an alternating current load connected to the outside of the corresponding energy storage module.
As shown in fig. 2, when the first energy storage module 21 is a subsystem-a system in the mobile energy storage system 1, the first energy storage module 21 is provided with a plurality of hardware modules, including: the system a includes a system a inverter module 214, a system a main control module 213 (in the figure, the system a MCU main control module), a system a battery management module (system a BMS + EMS module 212), a system a battery pack 211, a system a AC output interface 216 (each interface in the present application is not a specific strictly defined physical interface, for example, the system a AC output interface 216, and may also be a part of a module circuit or a hardware module connected to an external load after the dc/AC conversion by the inverter module, and therefore may also be referred to as a system a AC output module), and a system a display and external setting interface module 215.
As shown in fig. 3, when the second energy storage module 22 is a subsystem-B system in the mobile energy storage system 1, the second energy storage module 22 has a plurality of hardware modules, including: a B system inverter module 224, a B system main control module 223 (in the figure, the B system MCU main control module), a B system battery management module (the B system BMS + EMS module 222), a B system battery pack 221, a B system AC output interface 226 (not strictly defined as a specific physical interface, but may be a part of module circuits or hardware modules connected to an external load after the dc to AC conversion by the inverter module, and thus may also be referred to as a B system AC output module), and a B system display and external setting interface module 225.
In one embodiment, the intermediate hardware for connecting the a system and the B system or for connecting the energy storage modules is referred to as an intermediate module 20, and the intermediate module 20 is not strictly referred to as an inherent hardware module, and the functional circuits or functional hardware including the interface unit, the detection unit or the distribution unit may be simultaneously provided to each subsystem, so that the functional circuits may be directly connected without additional connection when the operator actually assembles the mobile energy storage system 1. Taking the example of the mobile energy storage system 1 formed by connecting the system a and the system B in the present application, the intermediate module 20 for connecting the system a and the system B includes hardware such as an interface circuit and a detection circuit, which can be simultaneously disposed in the system a and the system B. The intermediate module 20 includes: a discharge power management module 201, a capacity expansion module 202, an internal charge management module 204, and an external charge power management module 203.
The discharge power management module 201 includes a discharge power management unit 2011, a power extension interface 2012 (i.e., the AB system AC power extension output interface in fig. 2 to 3), an a-system discharge power distribution unit 2013, and a B-system discharge power distribution unit 2014; the discharging power management module 201 is configured to control the power expansion interface 2012 to start up when the external load power of the power expansion interface 2012 is greater than the rated output power of a single energy storage module, so that the plurality of energy storage modules are connected in parallel and output the expanded power.
The discharge power management unit 2011 is connected to the power expansion interface 2012, and is configured to control an interface (the power expansion interface 2012) and output power of the output power in the mobile energy storage system 1; the discharging power distribution unit is connected with the discharging power management unit 2011, and the discharging power distribution unit is used for detecting the external load power of the power expansion interface 2012 and forbidding the independent output interface when the external load power of the power expansion interface 2012 is greater than the rated output power of the single energy storage module.
In this application, the power expansion interface 2012 and the independent output interface do not refer to a visible independent physical output interface, but refer to the mobile energy storage system 1 or an output interface circuit of the independent energy storage module thereof for outputting power and discharging to an external load, and a user may only observe an independent physical discharge interface for connecting the external load when using the mobile energy storage system 1, but actually when the physical discharge interface is connected with the external load, both the independent output interface of the energy storage module and the power expansion interface 2012 of the mobile energy storage system 1 are connected with the external load. Therefore, the discharge power distribution unit is configured to detect the external load power of the power expansion interface 2012, and substantially monitor the external load power of the independent output interface of the energy storage module where the discharge power distribution unit is located based on the preset of the mobile energy storage system 1.
When the mobile energy storage system 1 actually outputs power, the system a or the system B may output power based on a preset setting, and when the external load power is greater than the rated output power of any energy storage module, the power expansion interface 2012 is activated to amplify the total output power of the mobile energy storage system 1, so as to improve the discharging efficiency of the mobile energy storage system 1. The discharge power distribution unit (a-system discharge power distribution unit 2013 or B-system discharge power distribution unit 2014) is connected to the corresponding independent output interface (a-system AC output interface 216 or B-system AC output interface 226) for detecting the output power of the independent output interface.
When the mobile energy storage system 1 is used for discharging, when the system a discharging power distribution unit 2013 detects that the external load power of the system a AC output interface 216 is greater than the rated output power of a single energy storage module-a system, the system a main control module disables the system a AC output interface 216 through the system a discharging power distribution unit 2013, the system B main control module controls the system B to intervene in discharging, the system B discharging power distribution unit 2014 starts the system B to output discharging, and the system a main control module is further used for controlling the discharging power management unit 2011 to enable the power expansion interface 2012 to enable the system a and the system B to output in parallel. When the external load power of the discharge power management module 201 is greater than the rated output power of a single energy storage module, the discharge power management module disables the corresponding independent output interface through the discharge power distribution unit, and then turns on the power expansion interface 2012 through the discharge power management unit 2011, so that a plurality of energy storage modules are connected in parallel to output the expansion power.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a power expansion discharge process of the mobile energy storage system 1 according to an embodiment of the present application. Referring to fig. 2 to 4, steps of the mobile energy storage system 1 to achieve the power expansion discharge output are shown in steps S210 to S217.
The discharging power management module 201 manages the output power of the system a, the system B and the mobile energy storage system 1, and the specific process is as follows: the system a discharge power distribution unit 2013 detects the load power of the system a AC output interface 216, the system B discharge power distribution unit 2014 detects the load power of the system B AC output interface 226, and the main control module respectively judges whether the independent output interface corresponding to the main control module is connected with the external load based on the respective load power. When the independent output interface of the system A is connected with a load and the load power is greater than the rated output power of the system A or the system B, the mobile energy storage system 1 starts the energy storage module-system B through the system B main control module to control the energy storage module-system B to intervene in the common discharge, specifically: the B system output is started through the discharging power distribution module of the middle module 20, the power expansion interface 2012 is opened through the power management unit to control the B system and the a system to realize AC parallel output, and at this time, the sum of the rated power of the a system and the rated power of the B system is the expansion power of the mobile energy storage system 1.
The system A and the system B can control the frequency of the output voltage of the corresponding inversion module to be the same through the main control module. After the power expansion interface 2012 detects the load output, the system a main control module or the system B main control module limits the output voltage of the other subsystem by controlling the system a inverter module 214 or the system B inverter module 224 with reference to the subsystem with large output power, and the output voltage of the subsystem with limited output does not exceed the reference voltage of the subsystem with large output power, and the voltage and current phases output by the two subsystems are almost the same, and the phase difference cannot exceed 1 degree. For example, based on the system a, the microprocessor in the system B inverter module 224 can sense the ac waveform outputted from the system a, and generate the same phase voltage and the same phase output of the system a according to the waveform.
In addition, when the external load power is greater than the rated output power of the system a or the system B and the power expansion interface 2012 is started, the discharging power distribution unit controls the independent output interfaces of the system B and the system a to prohibit output. When the power expansion interface 2012 is connected without a load, the independent output interfaces of the B system and the a system can be discharged separately. When the mobile energy storage system 1 discharges through the power expansion interface 2012 or the independent output interface of the subsystem, the internal or external charging operation is prohibited.
In an embodiment, the middle module 20 further includes a capacity expansion module 202, the capacity expansion module 202 includes a discharging step-up and step-down unit 2021 (a step-up and step-down unit inside the AB system shown in fig. 2 or fig. 3), and the discharging step-up and step-down unit 2021 is connected to the system a inverter module 214 and the system B inverter module 224, and is configured to adjust the output voltage values of the other energy storage modules to the input voltage value of the highest efficiency point of the current discharging energy storage module.
Referring to fig. 5, fig. 5 is a schematic view illustrating an expansion discharging flow of the mobile energy storage system 1 according to an embodiment of the present application. Referring to fig. 2 to 5, the capacity expansion discharging process is shown in steps S220 to S227.
The discharging step-up and step-down unit 2021 is used for adjusting the output voltage of the a-system battery pack 211Or the B-system battery pack 221 outputs a voltage to reach the same reference voltage V _REF . Wherein, the initial output voltages of the battery pack voltages of the system B and the system A are respectively V B 、V A . Output voltage V of system B B The voltage is adjusted to V by the discharging step-up and step-down unit 2021 B Lifting; output voltage V of A system A The voltage is adjusted to V by the discharging step-up and step-down unit 2021 A And (6) lifting. The highest efficiency point of an inversion module in the A system is designed to have an input voltage V Height A And the highest efficiency point of the inversion module in the system B is designed to have an input voltage V Height B 。
The specific process of capacity expansion and discharge is as follows: the main control module detects an independent output interface (a system AC output interface 216 or a system AC output interface 226) corresponding to the subsystem where the main control module is located, and judges whether the system AC output interface 226 is the system AC output interface 216 or the system AC output interface 216 discharges. After detecting that a certain independent output interface discharges, the main control module determines the currently discharged subsystem and sets a reference voltage V _REF The reference voltage is the maximum efficiency point input voltage of the inverter module corresponding to the discharging subsystem (i.e. the maximum efficiency point design input voltage of the inverter module), and the output voltage of the current discharging subsystem is also substantially equal to the reference voltage. The system A or the system B can mutually read the input voltage V of the maximum efficiency point of the inverter module of the opposite side through the corresponding main control module Height B Or V Height A 。
After setting the reference voltage as the maximum efficiency point input voltage of the inverter module of the discharging subsystem, the output voltage of the battery pack 211 of the system a or the output voltage of the battery pack 221 of the system B is respectively and correspondingly boosted or stepped down to V through the discharging step-up and step-down unit 2021 (the step-up and step-down unit in the system AB) _REF . That is, when the system B discharges and the system a expands the capacity of the system B, the system a adjusts the voltage input to the system B to the reference voltage through the discharging step-up/step-down unit 2021, so that the system B can output the voltage on the same voltage platform to achieve the effect of capacity expansion and discharge, and at this time, the system V discharges _REF Is a V Height B (ii) a When the system a discharges and the system B expands the capacity of the system a, the system B adjusts the voltage input to the system a to the reference voltage through the discharging step-up/step-down unit 2021, so that the system a and the system B can be maintained on the same voltage platformOutput and reach the effect of capacity expansion discharge, V _REF Is a V Height A . When discharging on the same platform, the total capacity of the mobile energy storage system 1 is the sum of the capacity of the system A and the capacity of the system B, so that the purpose of capacity expansion and discharge is achieved; the voltage platform of the currently discharged energy storage module can be equal to the input voltage of the maximum efficiency point of the corresponding inverter module by default.
In an embodiment, the middle module 20 further includes an internal charging management module 204 and an external charging power management module 203, the internal charging management module 204 includes a charging buck-boost unit (shown as an internal DC boost-buck unit 2041 of the system a or an internal DC boost-buck unit 2042 of the system B) and a DC input/output unit 2043 (shown as an internal DC input/output unit of the system AB), and the charging buck-boost unit is connected to the battery management module; the charging buck-boost unit is used for adjusting the initial voltage value of the second energy storage module 22 to the rated charging voltage value of the first energy storage module 21 when the second energy storage module 22 charges the first energy storage module 21. The charging buck-boost unit is further configured to adjust an initial voltage value of the first energy storage module 21 to a rated charging voltage value of the second energy storage module 22 when the first energy storage module 21 charges the second energy storage module 22. The dc input/output unit 2043 is connected to the battery management modules of the two subsystems. The rated charging voltage value is the voltage value of the charged energy storage module when the charged energy storage module is fully charged.
In an embodiment, the charging buck-boost unit (the internal DC boost and buck unit 2041 of the system a or the internal DC boost and buck unit 2042 of the system B) and the discharging buck-boost unit 2021 (the internal DC boost and buck unit of the system AB) can be uniformly designed as a same functional circuit for implementing boost or buck functions, so as to implement buck-boost under capacity expansion requirements and buck-boost under internal charging requirements of other energy storage modules, thereby simplifying the circuit structure of the energy storage module.
The internal charging management module 204 further includes an external bidirectional dc input/output interface 2044 of the system a and an external bidirectional dc input/output interface 2045 of the system B, which are connected to the dc input/output unit 2043 and can be used to connect with an external power source or an external load for charging or discharging in a dc environment. The system a external bidirectional dc input/output interface 2044 and the system B external bidirectional dc input/output interface 2045 may be charged or discharged in a dc environment after being connected to an external power supply or an external load.
The external charging power management module 203 includes a charging power distribution unit 2031 (shown as an AB system AC charging power distribution unit 2031) and an external charging interface 2032 (shown as an AB system AC charging external interface), the charging power distribution unit 2031 is respectively connected to the main control modules of the energy storage modules (the a system main control module 213 and the B system main control module 223), and is configured to distribute charging power to the energy storage modules when the external charging interface 2032 is connected to an external AC power supply.
Referring to fig. 6, fig. 6 is a schematic view of a charging process of the mobile energy storage system 1 according to an embodiment of the present disclosure. As shown in fig. 2 to 6, the charging process of the mobile energy storage system 1 is as shown in steps S230 to S258.
External charging flow (see steps S241 to S246 in fig. 6): an external power supply can charge each subsystem in the mobile energy storage system 1 through an external charging interface 2032 (AB system AC charging interface). The charging power management can be set through a charging key, and when the mobile energy storage system 1 is charged by an external power supply, the system A or the system B can be independently charged, and after one subsystem is fully charged, the other subsystem is automatically replaced for charging; it may also be arranged that both subsystems are charged simultaneously.
Based on the charging mode preset by the user clicking the key, when it is detected that the external charging interface 2032 is connected to an external power supply for charging, the main control module determines whether the subsystems in the mobile energy storage system 1 are sequentially and independently charged or simultaneously charged. If the charging is performed independently, the charging power distribution unit 2031 distributes the total charging power to the corresponding subsystems; when the external power supply charges two subsystems in the mobile energy storage system 1 at the same time, the charging power distribution unit 2031 is configured to distribute and manage the charging power of the system B and the system a, and specifically includes: when the total power of the alternating current charging is W Charging assembly Then, the residual electric quantity of the system B and the system A is respectively calculated as SOC B And SOC A At this time, the distributed charging power of the B system is defined as W B System ADistributing charging power to W A . The charging power distribution unit 2031 needs to satisfy the following conditions when distributing the charging power to ensure that the subsystems are fully charged at the same time:
W charging assembly ＝W B +W A ；
SOC B /W B ＝SOC A /W A 。
Internal charging process (see steps S251 to S258 in fig. 6): under the condition of no external power supply, the system B and the system a may be connected through the dc input/output unit 2043 and charged with each other. When the electric quantity of a certain subsystem is too low, the subsystem with high electric quantity can charge the subsystem with low electric quantity through the preset system setting. Since the battery pack voltages of the system B and the system a are not necessarily at one voltage level, and thus cannot be charged directly, the initial charging voltage needs to be adjusted in advance by the corresponding charging step-up and step-down units.
For example, the system B is set to charge the system A, and the initial voltage of the system B is V B When the a-system battery pack 211 is fully charged, the voltage is V A is full . Initial charging voltage V of B system B Regulated to V by B system internal DC step-up and step-down unit 2042 B lifting And need to satisfy V B lifting ＝V A is full Then, the charging voltage of the B system charges the a system battery pack 211 through the dc input output unit 2043.
Setting the system A to charge the system B, wherein the initial voltage of the system A is V A When the B-system battery pack 221 is fully charged, the voltage is V B is full of . Initial voltage V of A system A Regulated to V by system A internal DC step-up and step-down unit 2041 A lifting And need to satisfy V A lifting ＝V B is full of The charging voltage of the a system charges the B system battery pack 221 through the dc input/output unit 2043.
In an embodiment, the dc input/output unit 2043 is further connected to a dc input/output interface, and when the dc input/output interface is connected to an external dc power source or an external dc load, the subsystem may supply power to the external dc load through the dc input/output interface (the external bidirectional dc input/output interface 2044 of the system a and the external bidirectional dc input/output interface 2045 of the system B), or may be charged through the external dc power source.
Through the arrangement of the discharging power management module 201 and other modules, the mobile energy storage system 1 is compatible with energy storage modules with different capacities, voltage platforms or powers, so that functional requirements of mutual power expansion and the like of the energy storage modules in the system are met. The user can independently use an energy storage module in the mobile energy storage system 1 provided by the application, and the power expansion and long endurance effects of the mobile energy storage system 1 can be realized by combining different energy storage modules according to the application scene requirements.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A scalable power mobile energy storage system, comprising:
the energy storage modules are provided with shells, and handles are arranged on the shells;
the energy storage modules are connected through the middle module; the middle module comprises a discharge power management module, and the discharge power management module comprises a power expansion interface;
the discharge power management module is used for controlling the power expansion interface to be started when the external load power of the power expansion interface is larger than the rated output power of a single energy storage module, so that the energy storage modules are connected in parallel and the expansion power is output.
2. The mobile energy storage system of claim 1, wherein the discharge power management module further comprises:
and the discharge power management unit is connected with the power expansion interface and is used for controlling the power expansion interface and the output power.
3. The mobile energy storage system of claim 2, wherein the energy storage module is provided with an independent output interface, and the discharge power management module further comprises:
the discharge power distribution unit is connected with the discharge power management unit;
the discharge power distribution unit is used for detecting the external load power of the power expansion interface and forbidding the independent output interface when the external load power of the power expansion interface is larger than the rated output power of the single energy storage module.
4. The mobile energy storage system of claim 1, wherein the energy storage module comprises:
the battery pack is used for storing electric quantity;
and the main control module is connected with the battery pack and used for controlling other modules in the energy storage module.
5. The mobile energy storage system of claim 4, wherein the intermediate module further comprises:
the capacity expansion module comprises a discharge buck-boost unit, and the discharge buck-boost unit is connected with each energy storage module;
the discharging buck-boost unit is used for adjusting the output voltage values of other energy storage modules to the input voltage value of the highest efficiency point of the current discharging energy storage module.
6. The mobile energy storage system of claim 5, wherein the energy storage module further comprises:
the expansion module is connected with the main control module through the inversion module, and the inversion module is used for converting the direct current of the battery pack into alternating current.
7. The mobile energy storage system of claim 4, wherein the energy storage module comprises:
and the battery management module is connected with the battery pack and the main control module and used for controlling the charging and discharging state of the battery pack and preventing the battery pack from being overcharged or overdischarged.
8. The mobile energy storage system of claim 7, wherein the intermediate module further comprises an internal charge management module, the internal charge management module comprising:
the charging voltage boosting and reducing unit is connected with the battery management module;
the energy storage module comprises a first energy storage module and a second energy storage module, and the charging voltage boosting and reducing unit is used for adjusting the initial voltage value of the second energy storage module to the rated charging voltage value of the first energy storage module when the second energy storage module charges the first energy storage module.
9. The mobile energy storage system of claim 4, wherein the intermediate module further comprises:
the external charging power management module comprises a charging power distribution unit and an external charging interface, wherein the charging power distribution unit is respectively connected with the main control module of each energy storage module and is used for distributing charging power for each energy storage module when the external charging interface is connected with an external power supply.
10. The mobile energy storage system of claim 4, wherein the energy storage module further comprises:
and the display and external interface module is connected with the main control module and is used for displaying the residual electric quantity and the input and output power of the energy storage module.
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| CN202222486883.4U CN218415879U (en) | 2022-09-20 | 2022-09-20 | Mobile energy storage system capable of expanding power |
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| CN202222486883.4U CN218415879U (en) | 2022-09-20 | 2022-09-20 | Mobile energy storage system capable of expanding power |
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