Household energy storage system

Abstract

The utility model provides a household energy storage system, comprising an inversion device comprising a housing, and a DC / DC converter and a DC / AC converter arranged in the housing; the at least one first battery pack and the at least one second battery pack are detachably mounted on the shell respectively, the first battery pack is a low-nominal-voltage battery pack, and the second battery pack is a high-nominal-voltage battery pack; the solar charging interface is configured on the inversion device and is suitable for being connected with a solar cell panel so as to store photovoltaic power to the first battery pack and / or the second battery pack through the DC / DC converter; wherein the DC / AC converter is configured to be suitable for receiving direct-current power from the first battery pack and / or the second battery pack and outputting alternating-current power, and the alternating-current power is used by a household load. According to the technical scheme, the household energy storage system which is highly flexible and adapts to multiple scenes is provided.

Description

Technical Field

[0001] This utility model relates to an energy storage system, and more particularly to a home energy storage system. Background Technology

[0002] The limitations of existing home energy storage system technologies are mainly reflected in the following aspects:

[0003] Poor single voltage adaptability: Traditional systems only support a single voltage;

[0004] Fixed structure is rigid: Battery packs are mostly non-removable, which cannot meet the needs of outdoor operations. When working outdoors, the entire energy storage device must be carried, which is not portable and forces the power supply to household loads to be interrupted. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problems and provide a highly flexible home energy storage system that is adaptable to multiple scenarios.

[0006] This utility model provides a home energy storage system, which includes:

[0007] Inverter unit, including housing and DC / DC converter and DC / AC converter located within the housing;

[0008] At least one first battery pack and at least one second battery pack are detachably mounted on the housing, wherein the first battery pack is a low nominal voltage battery pack and the second battery pack is a high nominal voltage battery pack;

[0009] A solar charging interface, configured on the inverter and adapted to connect a solar panel, is provided to store photovoltaic power into the first battery pack and / or the second battery pack via the DC / DC converter; wherein,

[0010] The DC / AC converter is configured to receive DC power from the first battery pack and / or the second battery pack and output AC power for use by household loads.

[0011] Furthermore, the DC / AC converter is also adapted to receive photovoltaic power and transmit excess power to the public power grid when there is a surplus of photovoltaic power.

[0012] Furthermore, it also includes:

[0013] A wireless power metering socket is connected between the AC input bus and the AC electrical equipment to monitor the power consumption of the AC electrical equipment.

[0014] Furthermore, in the off-grid state, the inverter and the first battery pack and / or the second battery pack are suitable for carrying out outdoor energy storage.

[0015] Furthermore, the second battery pack has a higher nominal battery capacity than the first battery pack, and in the off-grid state, the second battery pack is suitable for charging the first battery pack through the inverter.

[0016] Furthermore, the second battery pack is adapted to support the stacking and expansion of multiple battery packs of the same model through a parallel interface.

[0017] Furthermore, the first battery pack and / or the second battery pack are adapted to be separated from the housing to power a first DC power device and / or a second DC power device, wherein the first DC power device and the second DC power device are power devices of different voltage series.

[0018] Furthermore, it also includes:

[0019] A third battery pack suitable for storing photovoltaic power, the third battery pack being detachably mounted on the housing;

[0020] The third battery pack and the first battery pack are low-voltage battery packs with different nominal voltages.

[0021] Furthermore, the third battery pack is adapted to be detached from the housing for use in powering a third DC electrical device.

[0022] Furthermore, the DC / AC converter is configured to selectively receive DC power from a single battery pack, a second battery pack, and a third battery pack, or to simultaneously select multiple battery packs, and to output AC power through an inverter.

[0023] Furthermore, the system supports three operating modes:

[0024] Mode 1: Photovoltaic power is prioritized for storage in battery banks, with surplus power connected to the grid;

[0025] Mode 2: Solar power is prioritized for household loads, with any surplus stored in battery banks;

[0026] Mode 3: Photovoltaic power is used only for household loads and battery storage, and is not connected to the grid.

[0027] This utility model provides another home energy storage system, characterized in that it includes:

[0028] First inverter unit;

[0029] A portable battery pack adapted and connected to the first inverter;

[0030] The second inverter is suitable for connecting to solar energy and mains power;

[0031] A fourth battery pack adapted and connected to the second inverter, wherein the fourth battery pack is electrically connected in parallel with the portable battery pack;

[0032] The second inverter and the fourth battery pack are suitable for home fixed installation;

[0033] A solar charging interface is configured on the second inverter and adapted to connect a solar panel to store photovoltaic power in the fourth battery pack and / or the portable battery pack.

[0034] The second inverter is also configured to receive DC power from the fourth battery pack and / or the portable battery pack and output AC power for use by household loads.

[0035] Furthermore, the second inverter is equipped with rollers, and the fourth battery pack is stacked on top of the second inverter.

[0036] Furthermore, the portable battery pack includes a first battery pack and a second battery pack, with the second battery pack stacked on top of the fourth battery pack and connected in electrical parallel.

[0037] Furthermore, the first inverter and the portable battery pack are suitable for disassembly and separation for outdoor energy storage.

[0038] Furthermore, the system supports the following modes:

[0039] Users can detach the portable battery pack to power power tools, while the fourth battery pack continuously powers household loads.

[0040] Furthermore, the system supports the following modes:

[0041] Take the first inverter and the portable battery pack with you when you go out, and disconnect the battery pack to power the power tools.

[0042] Furthermore, the portable battery pack includes at least a first battery pack and a second battery pack, wherein when the second battery pack is connected to the first inverter, it is adapted to charge the first battery pack.

[0043] Furthermore, the portable battery pack also includes a third battery pack, which is detachably installed in the first inverter device;

[0044] The third battery pack and the first battery pack are low-voltage battery packs with different nominal voltages, and the second battery pack is a high-nominal-voltage battery pack. The second battery pack is adapted to charge the first battery pack and / or the third battery pack through the first inverter.

[0045] Furthermore, the portable battery pack includes a second battery pack, which is adapted to support the stacking and expansion of multiple battery packs of the same model through a parallel interface, and is electrically connected in parallel with the fourth battery pack through the parallel interface.

[0046] Furthermore, the fourth battery pack has the same nominal voltage as the second battery pack and / or the nominal capacity of the fourth battery pack is greater than the nominal capacity of the second battery pack.

[0047] The advantages of this utility model over the prior art are as follows:

[0048] This invention provides a highly flexible home energy storage system that is adaptable to multiple scenarios through modular battery pack design and multi-voltage adaptation. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 : Schematic diagram of the structure of the energy storage system of this utility model in specific embodiment 1;

[0051] Figure 2 Specific Embodiment 1 of the Utility Model Energy Storage System Structure: Structural Cross-Section Figure 1 ;

[0052] Figure 3 : Schematic diagram of the second battery pack structure in specific embodiment 1 of the utility model energy storage system;

[0053] Figure 4 : Specific embodiment of the energy storage system structure of this utility model 1: Structural cross-section Figure 2 ;

[0054] Figure 5 : Schematic diagram of the structure of the energy storage system of this utility model in specific embodiment 2;

[0055] Figure 6 : A schematic diagram of the inverter device structure in specific embodiment 2 of the energy storage system of this utility model;

[0056] Figure 1a : Schematic diagram of the structure of the energy storage system of this utility model in specific embodiment 1a;

[0057] Figure 2a : Schematic diagram of the structure of the energy storage system of this utility model, specific embodiment 2a;

[0058] Figure 1b : Schematic diagram of the structure of the energy storage system of this utility model in specific embodiment 1b;

[0059] Figure 2b : Schematic diagram of the structure of the energy storage system of this utility model in specific embodiment 2b;

[0060] Figure 7 : Specific embodiment 1 of the charging and discharging of the energy storage system of this utility model: Discharge schematic block diagram;

[0061] Figure 8 Specific embodiment of the charging and discharging of the energy storage system of this utility model 1 Charging schematic box Figure 1

[0062] Figure 9 Specific embodiment of the charging and discharging of the energy storage system of this utility model 1 Charging schematic box Figure 2 ;

[0063] Figure 10 : Specific embodiment 2 of the charging and discharging of the energy storage system of this utility model: Discharge schematic block diagram;

[0064] Figure 11 : Specific embodiment 2 of the charging and discharging of the energy storage system of this utility model: Charging schematic box Figure 1 ;

[0065] Figure 12 : Specific embodiment 2 of the charging and discharging of the energy storage system of this utility model: Charging schematic box Figure 2 ;

[0066] Figure 13 : Specific embodiment 3 of the charging and discharging of the energy storage system of this utility model: Discharge schematic block diagram;

[0067] Figure 14 3. Charging schematic diagram of a specific embodiment of the energy storage system of this utility model. Figure 1 ;

[0068] Figure 15 3. Charging schematic diagram of a specific embodiment of the energy storage system of this utility model. Figure 2 ;

[0069] Figure 16 : Schematic block diagram of specific embodiment 4 of the energy storage system of this utility model for charging and discharging;

[0070] Figure 17 : Specific embodiment of the charging and discharging of the energy storage system of this utility model, 4. Charging schematic box Figure 1 ;

[0071] Figure 18 : Specific embodiment of the charging and discharging of the energy storage system of this utility model, 4. Charging schematic box Figure 2 ;

[0072] Figure 19 : Schematic block diagram of specific embodiment 5 of the energy storage system of this utility model for charging and discharging;

[0073] Figure 20 5. Charging schematic diagram of a specific embodiment of the energy storage system of this utility model. Figure 1 ;

[0074] Figure 21 5. Charging schematic diagram of the specific embodiment of the energy storage system of this utility model. Figure 2 ;

[0075] Figure 22 : Specific embodiment 6 of the charging and discharging of the energy storage system of this utility model: Discharge schematic block diagram;

[0076] Figure 23 7. Charging schematic diagram of the specific embodiment of the energy storage system of this utility model. Figure 1 ;

[0077] Figure 24 : Specific embodiment of the charging and discharging of the energy storage system of this utility model 8 Charging schematic box Figure 2 ;

[0078] Figure 25 : Schematic diagram of the principle of embodiment 1 of the household energy storage system of this utility model;

[0079] Figure 26 : Schematic diagram of the application of the outdoor energy storage embodiment 1 of this utility model;

[0080] Figure 27 : Schematic diagram of the working mode of Embodiment 1 of the outdoor energy storage system of this utility model;

[0081] Figure 28 : Schematic diagram of working mode 2 of embodiment 1 of the outdoor energy storage system of this utility model;

[0082] Figure 29 : Schematic diagram of working mode three of embodiment 1 of this utility model outdoor energy storage system;

[0083] Figure 30 : Schematic diagram of the principle of embodiment 2 of the household energy storage system of this utility model;

[0084] Figure 31 Example 2 of the outdoor energy storage system of this utility model: working mode 1 schematic diagram;

[0085] Figure 32 Example 2 of this utility model's outdoor energy storage system provides a schematic diagram of a home energy storage system corresponding to its working mode.

[0086] Figure 33Example 2 of the outdoor energy storage system of this utility model: working mode 2 schematic diagram;

[0087] Figure 34 Example 2 of this utility model shows a schematic diagram of a home energy storage system corresponding to working mode two of the outdoor energy storage system.

[0088] Figure 35 Example 2 of this utility model's outdoor energy storage system illustrates the working mode 3.

[0089] Figure 36 Example 2 of this utility model shows a schematic diagram of a home energy storage system corresponding to working mode three of the outdoor energy storage system. Detailed Implementation

[0090] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0091] [Energy Storage System Structure]

[0092] Example 1

[0093] Reference Figure 1 and Figure 2 As shown, an energy storage system includes:

[0094] An inverter 100 includes a housing 10 and an inverter 11 located within the housing 10;

[0095] At least one first battery pack 200 is configured to be removably mounted to the housing 10;

[0096] At least one second battery pack 300, one of which is configured to be detachably mounted to the housing 10, and the remaining second battery packs 300 can be stacked with the second battery packs 300 mounted to the housing 10.

[0097] Inverter 11 is configured to receive and generate AC power output from first battery pack 200 and / or second battery pack 300; wherein,

[0098] The second battery pack 300 is different from the first battery pack 200;

[0099] When both the first battery pack 200 and the second battery pack 300 are installed in the housing 10, the second battery pack 300 is adapted to charge the first battery pack 200 through the inverter 100.

[0100] Of course, the inverter 100 also has a charging interface and a discharging interface suitable for user contact. The charging interface includes an AC charging port for connecting and receiving external AC power and a solar charging interface. The discharging interface includes an AC discharging port 14 and a DC discharging port. The AC discharging port 14 outputs AC power that has been inverted by the inverter 11.

[0101] In addition, the housing 10 of the inverter 100 is also provided with a mounting part 12 for removing and installing the first battery pack 200. The mounting part 12 includes a latching connection part and an electrical connection terminal. When the first battery pack 200 is inserted into the mounting part 12, a latching connection is formed between the first battery pack 200 and the latching connection part. At the same time, the discharge terminal of the first battery pack 200 forms an electrical connection with the corresponding electrical connection terminal. Of course, the first battery pack 200 is also provided with an unlocking button regarding the latching connection part. When it is necessary to remove the first battery pack 200, the unlocking button is pressed to unlock the first battery pack 200 from the latching connection part, and the user can remove and pull out the first battery pack 200 from the mounting part 12.

[0102] Furthermore, the second battery pack 300 is configured to be detachably mounted to the housing 10. Specifically, in this embodiment 1, the second battery pack 300 is detachably mounted at the bottom of the housing 10. In short, the second battery pack 300 serves as a base, and the inverter 100 is stacked on top of the second battery pack 300.

[0103] More specifically, refer to Figure 3 As shown, the second battery pack 300 has an unlock button 30, a latch 31 and a positioning slot 32, as well as an electrical connection interface 33, such as a male plug. Operating the unlock button 30, such as pressing the unlock button 30, can actuate the latch 31.

[0104] Correspondingly, refer to Figure 4 As shown, the inverter 100 has a latch groove corresponding to the latch 31, a positioning foot corresponding to the positioning groove 32, and a power receiving interface corresponding to the electrical connection interface 33, such as a female socket corresponding to the male plug. Through the male-female plug-in configuration of the male plug and female socket, the electrical connection between the second battery pack 300 and the inverter 100 is realized.

[0105] It is also worth mentioning that there are multiple second battery packs 300, which are stacked on top of each other and connected in parallel. At this time, the second battery packs 300 are also provided with parallel interfaces 34. The two are electrically connected to each other through the electrical connection interface 33 of one second battery pack 300 and the parallel interface 34 of another second battery pack 300 to realize the parallel connection between the two.

[0106] At this time, the inverter 100 can output AC inverters through the first battery pack 200 installed in the housing 10, and it can also output AC inverters through the second battery pack 300 installed in the housing 10. The various output modes of the inverter 100 will be described in detail below.

[0107] The first battery pack 200 or the second battery pack 300 of any detachable housing 10 is adapted to supply power to a first DC power device or a second DC power device, wherein the first DC power device is different from the second DC power device.

[0108] Specifically, the first battery pack 200 is a low nominal voltage battery pack with a low nominal voltage of less than 40V, such as 12V, 18V, 20V, 24V or 36V; it can be matched with DC power equipment with low nominal voltage, such as DC power tools for DC power output operation, especially electric drills, screwdrivers, garden blowers, chainsaws, etc.

[0109] The second battery pack 300 is a high nominal voltage battery pack with a nominal voltage of 40V or higher, preferably 40V to 80V, such as 40V, 54V, 60V, 72V and / or 80V; it can be matched with DC power equipment with high nominal voltage, such as DC power tools for DC power output operation, especially ice chisels, ride-on lawnmowers, electric bicycles, etc.

[0110] Furthermore, more preferably, the second battery pack 300 has a higher nominal battery capacity than the first battery pack 200. In this case, the second battery pack 300 may have the same nominal voltage as the first battery pack 200, or the nominal voltage of the second battery pack 300 may be higher than the nominal voltage of the first battery pack 200, or even the nominal voltage of the second battery pack 300 may be lower than the nominal voltage of the first battery pack 200. In this case, the second battery pack 300 is suitable for charging the first battery pack 200 by boosting its voltage through a DC / DC conversion module.

[0111] Example 2

[0112] Reference Figure 5 and Figure 6 As shown, in addition to the first battery pack 200, the inverter 100 is also equipped with a third battery pack 400, and the second battery pack 300 continues to be connected to the inverter 100 in accordance with the manner of Embodiment 1.

[0113] Specifically, the third battery pack 400 differs from the first battery pack 200, particularly in that it has different voltage parameters. However, it is worth mentioning that both the third battery pack 400 and the first battery pack 200 are preferably configured as low nominal voltage battery packs, with a low nominal voltage of less than 40V, such as 12V, 18V, 20V, 24V, or 36V. For example, the third battery pack 400 is 18V, and the first battery pack 200 is 12V; the third battery pack 400 is 24V, and the first battery pack 200 is 12V or 18V; the third battery pack 400 is 36V, and the first battery pack 200 is 12V, 18V, or 24V.

[0114] Furthermore, more preferably, the second battery pack 300 has a higher nominal battery capacity than the first battery pack 200 and the third battery pack 400, and the second battery pack 300 can charge the first battery pack 200 and the third battery pack 400.

[0115] Preferably, the first battery pack 200 and the third battery pack 400 have different nominal voltages, while the second battery pack 300 may have the same nominal voltage as the first battery pack 200 or the third battery pack 400, or the nominal voltage of the second battery pack 300 may be higher than that of the first battery pack 200 or the third battery pack 400, or even lower than that of the first battery pack 200 or the third battery pack 400. In this case, the second battery pack 300 is suitable for charging the first battery pack 200 or the third battery pack 400 by boosting its voltage through a DC / DC conversion module. Regarding the structural design, refer to... Figure 6 As shown, the housing 10 of the inverter 100 is provided with two support feet (10a, 10b), and a mounting part suitable for mounting and connecting a third battery pack 400 is provided between the support feet (10a, 10b). The third battery pack 400 is detachably mounted to the mounting part. The surface of the third battery pack 400 mounted to the mounting part does not extend beyond the bottom surface of the support feet (10a, 10b).

[0116] At this time, the second battery pack 300 can charge both the first battery pack 200 and the third battery pack 400. The charging control method will be further described below.

[0117] Example 1a

[0118] Reference Figure 1a As shown, this embodiment is basically similar in structure and principle to the above embodiment 1. The difference is that this embodiment also includes a fourth battery pack 500 with a larger nominal capacity. At this time, the nominal capacity of the fourth battery pack 500 is greater than the nominal capacity of the second battery pack 300, and the nominal capacity of the second battery pack 300 is greater than the nominal capacity of the first battery pack 200.

[0119] Preferably, the fourth battery pack 500 has the same nominal voltage as the second battery pack 300. Of course, the fourth battery pack 500 and the second battery pack 300 may also have different nominal voltages. In this case, the fourth battery pack 500 and / or the second battery pack 300 have their respective corresponding DC / DC conversion modules.

[0120] Example 2a

[0121] Reference Figure 2a As shown, this embodiment is basically similar in structure and principle to the above embodiment 2. The difference is that this embodiment also includes a fourth battery pack 500 with a larger nominal capacity. At this time, the nominal capacity of the fourth battery pack 500 is greater than the nominal capacity of the second battery pack 300, and the nominal capacity of the second battery pack 300 is greater than the nominal capacity of the first battery pack 200 or the third battery pack 400.

[0122] Preferably, the fourth battery pack 500 has the same nominal voltage as the second battery pack 300. Of course, the fourth battery pack 500 and the second battery pack 300 may also have different nominal voltages. In this case, the fourth battery pack 500 and / or the second battery pack 300 have their respective corresponding DC / DC conversion modules.

[0123] Example 1b

[0124] Reference Figure 1b As shown, this embodiment is basically similar in structure and principle to the above embodiment 1a. The difference is that the energy storage system also includes a second inverter 600. The fourth battery pack 500 is stacked on top of the second inverter 600. Preferably, the second inverter 600 is provided with rollers to facilitate movement.

[0125] The aforementioned fourth battery pack 500 can be stacked and installed above the second inverter 600 to form a home energy storage system, which will be described in detail below.

[0126] The first battery pack 200, together with the inverter 100 and the second battery pack 200, can be stacked on top of the fourth battery pack 500 and connected in parallel with it, thereby expanding the capacity of the home energy storage system composed of the fourth battery pack 500 and the second inverter 600.

[0127] Example 2b

[0128] Reference Figure 2bAs shown, this embodiment is basically similar in structure and principle to the above embodiment 2a. The difference is that the energy storage system also includes a second inverter 600. The fourth battery pack 500 is stacked on top of the second inverter 600. Preferably, the second inverter 600 is provided with rollers to facilitate movement.

[0129] The aforementioned fourth battery pack 500 can be stacked and installed above the second inverter 600 to form a home energy storage system, which will be described in detail below.

[0130] The first battery pack 200, together with the inverter 100, the second battery pack 200 and the third battery pack 400, can be stacked on top of the fourth battery pack 500 and connected in parallel with it, which can expand the capacity of the home energy storage system composed of the fourth battery pack 500 and the second inverter 600.

[0131] [Energy storage system charging and discharging]

[0132] Example 1

[0133] Reference Figure 7 As shown, the inverter device 100 includes a bidirectional inverter. Multiple first battery packs 200 are boosted by a bidirectional DC / DC converter and then output to a bidirectional DC / AC converter. The bidirectional DC / DC converter and the bidirectional DC / AC converter are combined to form a bidirectional inverter.

[0134] The second battery pack 300 is directly connected to the bidirectional DC / AC converter.

[0135] Regarding the inverter output of inverter 100

[0136] When the inverter 100 outputs AC power, it can either receive DC power from multiple first battery packs 200, which is then boosted by a bidirectional DC / DC converter and connected to a bidirectional DC / AC converter for AC power output, or it can receive DC power from second battery packs 300, which is then directly output to the bidirectional DC / AC converter for AC power output. It should be noted that there can be multiple second battery packs 300, such as the multiple stacked second battery packs 300 connected in parallel as proposed in the above-mentioned [Energy Storage System Structure].

[0137] When the inverter 100 simultaneously receives power from the first battery pack 200 and the second battery pack 300, the inverter 100 preferably selects to receive the DC power from the second battery pack 300 for AC power output. When multiple second battery packs 300 are connected in parallel, the inverter 100 only starts to receive the DC power from the multiple first battery packs 200 when all the multiple second battery packs 300 are outputting to their cutoff voltage. At this time, the DC power from the multiple first battery packs 200 is boosted by the bidirectional DC / DC converter and then output to the bidirectional DC / AC converter for AC power output.

[0138] It should be noted that:

[0139] The inverter output power generated by the power output of a single second battery pack 300 to the inverter 100 is equivalent to the inverter output power generated by the power output of multiple first battery packs 200 to the inverter 100.

[0140] Regarding the charging of inverter 100

[0141] Charging method 1: Inverter 100 is connected to an external AC power source.

[0142] Reference Figure 8 As shown, when the inverter 100 is connected to an external AC power source, the AC power from the external AC power source is converted and rectified into DC power by a bidirectional DC / AC converter. The DC power can either be stepped down by the bidirectional DC / DC converter to charge the first battery pack 200, or it can be directly used to charge the second battery pack 300.

[0143] When the inverter 100 simultaneously receives and installs both the first battery pack 200 and the second battery pack 300, the inverter 100 preferably charges the first battery pack 200 to quickly charge its lower nominal voltage to meet user needs. Then, it charges the second battery pack 300. During this process, switches controlled by a controller should be installed on the branches of both the first and second battery packs (not shown in the figure). When multiple second battery packs 300 are connected in parallel, all of them can be charged simultaneously; alternatively, the first and second battery packs 200 can be charged alternately.

[0144] Charging method 2: Inverter 100 is not connected to an external AC power source.

[0145] Reference Figure 9As shown, when the inverter 100 is not connected to an external AC power source, the inverter 100 simultaneously receives and installs a first battery pack 200 and a second battery pack 300. When the controller detects that the first power parameter of the first battery pack 200 is lower than a first preset threshold and the second power parameter of the second battery pack 300 is higher than a second preset threshold, the controller controls the charging circuit between the first battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the first battery pack 200 through the charging circuit.

[0146] The charging circuit includes a bidirectional DC / DC converter and a first switch, which are configured between the first battery pack 200 and the second battery pack 300. When the first switch is closed, the second battery pack 300 is adapted to charge the first battery pack 200 by stepping down the voltage through the bidirectional DC / DC converter.

[0147] Wherein, the first power parameter is voltage or remaining power; and / or, the second power parameter is voltage or remaining power.

[0148] The second battery pack 300 is preferably designed to simultaneously meet the maximum charging power of multiple first battery packs 200.

[0149] Example 2

[0150] Reference Figure 10 As shown, the inverter device 100 includes a bidirectional inverter. Multiple first battery packs 200 are boosted by bidirectional DC / DC converters corresponding to each other and then connected to bidirectional DC / AC converters. The bidirectional DC / DC converters and bidirectional DC / AC converters are combined to form a bidirectional inverter.

[0151] The second battery pack 300 is directly connected to the bidirectional DC / AC converter.

[0152] Regarding the inverter output of inverter 100

[0153] When the inverter 100 outputs AC power, it can either receive DC power from multiple first battery packs 200, which is then boosted by corresponding bidirectional DC / DC converters and connected to the bidirectional DC / AC converter for AC power output, or it can receive DC power from second battery packs 300, which is then directly output to the bidirectional DC / AC converter for AC power output. It should be noted that there can be multiple second battery packs 300, such as multiple stacked second battery packs 300 connected in parallel as proposed in the above-mentioned [Energy Storage System Structure].

[0154] When the inverter 100 simultaneously receives power from the first battery pack 200 and the second battery pack 300, the inverter 100 preferably selects to receive the DC power from the second battery pack 300 for AC power output. When multiple second battery packs 300 are connected in parallel, the inverter 100 only starts to receive the DC power from the multiple first battery packs 200 when all the multiple second battery packs 300 output to their cutoff voltage. At this time, the DC power from the multiple first battery packs 200 is boosted by the corresponding bidirectional DC / DC converter and then output to the bidirectional DC / AC converter for AC power output.

[0155] It should be noted that:

[0156] The inverter output power generated by the power output of a single second battery pack 300 to the inverter 100 is equivalent to the inverter output power generated by the power output of multiple first battery packs 200 to the inverter 100.

[0157] Regarding the charging of inverter 100

[0158] Charging method 1: Inverter 100 is connected to an external AC power source.

[0159] Reference Figure 11 As shown, when the inverter 100 is connected to an external AC power source, the AC power from the external AC power source is converted and rectified into DC power by a bidirectional DC / AC converter. The DC power can either be stepped down by the bidirectional DC / DC converter to charge the first battery pack 200, or it can be directly used to charge the second battery pack 300.

[0160] When the inverter 100 simultaneously receives and installs both the first battery pack 200 and the second battery pack 300, the inverter 100 preferably charges the first battery pack 200 to quickly charge its lower nominal voltage to meet user needs. Then, it charges the second battery pack 300. During this process, switches controlled by a controller should be installed on the branches of both the first and second battery packs (not shown in the figure). When multiple second battery packs 300 are connected in parallel, all of them can be charged simultaneously; alternatively, the first and second battery packs 200 can be charged alternately.

[0161] Charging method 2: Inverter 100 is not connected to an external AC power source.

[0162] Reference Figure 12As shown, when the inverter 100 is not connected to an external AC power source, the inverter 100 simultaneously receives and installs a first battery pack 200 and a second battery pack 300. When the controller detects that the first power parameter of the first battery pack 200 is lower than a first preset threshold and the second power parameter of the second battery pack 300 is higher than a second preset threshold, the controller controls the charging circuit between the first battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the first battery pack 200 through the charging circuit.

[0163] The charging circuit includes a bidirectional DC / DC converter and a first switch, which are configured between the first battery pack 200 and the second battery pack 300. When the first switch is closed, the second battery pack 300 is adapted to charge the first battery pack 200 by stepping down the voltage through the bidirectional DC / DC converter.

[0164] Wherein, the first power parameter is voltage or remaining power; and / or, the second power parameter is voltage or remaining power.

[0165] It should be noted that the aforementioned first switch is provided between the second battery pack 300 and each of the first battery packs 200. Furthermore, the second battery pack 300 is preferably capable of simultaneously satisfying the maximum charging power of multiple first battery packs 200.

[0166] Example 3

[0167] Reference Figure 13 As shown, the inverter 100 includes a bidirectional inverter, and multiple first battery packs 200 are directly connected to the bidirectional DC / AC converter.

[0168] The second battery pack 300 is stepped down by a corresponding bidirectional DC / DC converter and then connected to a bidirectional DC / AC converter. The bidirectional DC / DC converter and the bidirectional DC / AC converter are combined to form a bidirectional inverter.

[0169] Regarding the inverter output of inverter 100

[0170] When the inverter 100 is performing AC inverter output, it can either receive DC power from multiple first battery packs 200, and connect the DC power output of the multiple first battery packs 200 to a bidirectional DC / AC converter for AC inverter output, or it can receive DC power from second battery packs 300, and output the DC power of the second battery packs 300 to a bidirectional DC / AC converter after being stepped down by a bidirectional DC / DC converter for AC inverter output. It should be noted that there can be multiple second battery packs 300, such as multiple stacked second battery packs 300 connected in parallel as proposed in the above [Energy Storage System Structure].

[0171] When the inverter 100 simultaneously receives power from the first battery pack 200 and the second battery pack 300, the inverter 100 preferably selects to receive the DC power from the second battery pack 300 for AC power output. When multiple second battery packs 300 are connected in parallel, the inverter 100 only starts to receive the DC power from the multiple first battery packs 200 when all the multiple second battery packs 300 output to their cutoff voltage. At this time, the DC power from the multiple first battery packs 200 is directly output to the bidirectional DC / AC converter for AC power output.

[0172] It should be noted that:

[0173] The inverter output power generated by the power output of a single second battery pack 300 to the inverter 100 is equivalent to the inverter output power generated by the power output of multiple first battery packs 200 to the inverter 100.

[0174] Regarding the charging of inverter 100

[0175] Charging method 1: Inverter 100 is connected to an external AC power source.

[0176] Reference Figure 14 As shown, when the inverter 100 is connected to an external AC power source, the AC power from the external AC power source is converted and rectified into DC power by a bidirectional DC / AC converter. The DC power can either be boosted by the bidirectional DC / DC converter to charge the second battery pack 300, or it can directly charge the first battery pack 200.

[0177] When the inverter 100 simultaneously receives and installs both the first battery pack 200 and the second battery pack 300, the inverter 100 preferably charges the first battery pack 200 to quickly charge its lower nominal voltage to meet user needs. Then, it charges the second battery pack 300. During this process, switches controlled by a controller should be installed on the branches of both the first and second battery packs (not shown in the figure). When multiple second battery packs 300 are connected in parallel, all of them can be charged simultaneously; alternatively, the first and second battery packs 200 can be charged alternately.

[0178] Charging method 2: Inverter 100 is not connected to an external AC power source.

[0179] Reference Figure 15As shown, when the inverter 100 is not connected to an external AC power source, the inverter 100 simultaneously receives and installs a first battery pack 200 and a second battery pack 300. When the controller detects that the first power parameter of the first battery pack 200 is lower than a first preset threshold and the second power parameter of the second battery pack 300 is higher than a second preset threshold, the controller controls the charging circuit between the first battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the first battery pack 200 through the charging circuit.

[0180] The charging circuit includes a bidirectional DC / DC converter and a first switch, which are configured between the first battery pack 200 and the second battery pack 300. When the first switch is closed, the second battery pack 300 is adapted to charge the first battery pack 200 by stepping down the voltage through the bidirectional DC / DC converter.

[0181] Wherein, the first power parameter is voltage or remaining power; and / or, the second power parameter is voltage or remaining power.

[0182] It should be noted that the aforementioned first switch is provided between the second battery pack 300 and each of the first battery packs 200. Furthermore, the second battery pack 300 is preferably capable of simultaneously satisfying the maximum charging power of multiple first battery packs 200.

[0183] Example 4

[0184] Reference Figure 16 As shown, the inverter device 100 includes a unidirectional inverter. Multiple first battery packs 200 are boosted by a unidirectional DC / DC converter and then output to a unidirectional DC / AC converter. The unidirectional DC / DC converter and the unidirectional DC / AC converter are combined to form a unidirectional inverter.

[0185] The second battery pack 300 is directly connected to a unidirectional DC / AC converter;

[0186] Meanwhile, a charging bypass is configured, and multiple first battery packs 200 and second battery packs 300 are respectively connected to the charging bypass through charging branches, and switches are provided on the charging branches.

[0187] Regarding the inverter output of inverter 100

[0188] When the inverter 100 outputs AC power, it can either receive DC power from multiple first battery packs 200, which is then boosted by a unidirectional DC / DC converter and output to a unidirectional DC / AC converter for AC power output, or it can receive DC power from second battery packs 300, which is then directly output to a unidirectional DC / AC converter for AC power output. It should be noted that there can be multiple second battery packs 300, such as multiple stacked second battery packs 300 connected in parallel as proposed in the above-mentioned [Energy Storage System Structure].

[0189] When the inverter 100 simultaneously receives power from the first battery pack 200 and the second battery pack 300, the inverter 100 preferably selects to receive the DC power from the second battery pack 300 for AC power output. When multiple second battery packs 300 are connected in parallel, the inverter 100 only starts to receive the DC power from the multiple first battery packs 200 when all the multiple second battery packs 300 output to their cutoff voltage. At this time, the DC power from the multiple first battery packs 200 is boosted by a unidirectional DC / DC converter and then output to a unidirectional DC / AC converter for AC power output.

[0190] It should be noted that:

[0191] The inverter output power generated by the power output of a single second battery pack 300 to the inverter 100 is equivalent to the inverter output power generated by the power output of multiple first battery packs 200 to the inverter 100.

[0192] Regarding the charging of inverter 100

[0193] Charging method 1: Inverter 100 is connected to an external AC power source.

[0194] Reference Figure 17 As shown, when the inverter 100 is connected to an external AC power source, the AC power from the external AC power source is converted and rectified into DC power through a charging bypass. The DC power is then used to charge the first battery pack 200 and the second battery pack 300 through their respective charging branches.

[0195] When the inverter 100 simultaneously receives and installs the first battery pack 200 and the second battery pack 300, the inverter 100 preferably charges the first battery pack 200 to quickly charge the first battery pack 200 with its lower nominal voltage to meet user needs. Then, it charges the second battery pack 300. During this process, switches controlled by the controller should be installed on the branches of both the first battery pack 200 and the second battery pack 300. When multiple second battery packs 300 are connected in parallel, all of them can be charged simultaneously; alternatively, the first battery pack 200 and the second battery pack 300 can be charged alternately.

[0196] Charging method 2: Inverter 100 is not connected to an external AC power source.

[0197] Reference Figure 18 As shown, when the inverter 100 is not connected to an external AC power source, the inverter 100 simultaneously receives the first battery pack 200 and the second battery pack 300. When the controller detects that the first power parameter of the first battery pack 200 is lower than the first preset threshold and the second power parameter of the second battery pack 300 is higher than the second preset threshold, the controller controls the charging bypass between the first battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the first battery pack 200 through the charging bypass.

[0198] Wherein, the first power parameter is voltage or remaining power; and / or, the second power parameter is voltage or remaining power.

[0199] The second battery pack 300 is preferably designed to simultaneously meet the maximum charging power of multiple first battery packs 200.

[0200] Example 5

[0201] Reference Figure 19 As shown, this embodiment 5 is basically the same in principle as the above embodiment 4, except that the charging bypass is provided with a first charging bypass and a second charging bypass.

[0202] Because the first battery pack 200 is different from the second battery pack 300, for example, the first battery pack 200 described above is a low nominal voltage battery pack with a low nominal voltage of less than 40V, such as 12V, 18V, 20V, 24V or 36V; it can be matched with DC power equipment with low nominal voltage, such as DC power tools for DC power output operation, especially electric drills, screwdrivers, garden blowers, chainsaws, etc.

[0203] The second battery pack 300 is a high nominal voltage battery pack with a nominal voltage of 40V or higher, preferably 40V to 80V, such as 40V, 54V, 60V, 72V and / or 80V; it can be matched with DC power equipment with high nominal voltage, such as DC power tools for DC power output operation, especially ice chisels, ride-on lawnmowers, electric bicycles, etc.

[0204] This results in inconsistent charging voltages for the first battery pack 200 and the second battery pack 300. Therefore, to facilitate the charging management of the first battery pack 200 and the second battery pack 300, a first charging bypass and a second charging bypass corresponding to each other are respectively set up.

[0205] Regarding the charging of inverter 100

[0206] Charging method 1: Inverter 100 is connected to an external AC power source.

[0207] Reference Figure 20 As shown, when the inverter 100 is connected to an external AC power source, the AC power from the external AC power source is converted and rectified into DC power through the first charging bypass. The DC power is then used to charge the first battery pack 200 and the second battery pack 300 through the corresponding charging branches.

[0208] When the inverter 100 simultaneously receives and installs the first battery pack 200 and the second battery pack 300, the inverter 100 preferably charges the first battery pack 200 to quickly charge the first battery pack 200 with its lower nominal voltage to meet user needs. Then, it charges the second battery pack 300. During this process, switches controlled by the controller should be installed on the branches of both the first battery pack 200 and the second battery pack 300. When multiple second battery packs 300 are connected in parallel, all of them can be charged simultaneously; alternatively, the first battery pack 200 and the second battery pack 300 can be charged alternately.

[0209] Charging method 2: Inverter 100 is not connected to an external AC power source.

[0210] The second battery pack 300 is connected to the first charging bypass via switch S3.

[0211] Reference Figure 21 As shown, when the inverter 100 is not connected to an external AC power source, the inverter 100 simultaneously receives and installs a first battery pack 200 and a second battery pack 300. When the controller detects that the first power parameter of the first battery pack 200 is lower than a first preset threshold and the second power parameter of the second battery pack 300 is higher than a second preset threshold, the controller controls the switches S3 and S1 between the first battery pack 200 and the second battery pack 300 to close and S2 to open, the first charging bypass is opened, and the second battery pack 300 charges the first battery pack 200 through the first charging bypass.

[0212] Wherein, the first power parameter is voltage or remaining power; and / or, the second power parameter is voltage or remaining power.

[0213] The second battery pack 300 is preferably designed to simultaneously meet the maximum charging power of multiple first battery packs 200.

[0214] Example 6

[0215] Reference Figure 22 As shown, unlike the embodiments described above, this embodiment also includes at least one third battery pack 400. As mentioned above, the third battery pack 400 differs from the first battery pack 200, particularly in that it has different voltage parameters. However, it is worth mentioning that both the third battery pack 400 and the first battery pack 200 are preferably configured as low nominal voltage battery packs, with a low nominal voltage of less than 40V, such as 12V, 18V, 20V, 24V, or 36V. For example, the third battery pack 400 is 18V, and the first battery pack 200 is 12V; the third battery pack 400 is 24V, and the first battery pack 200 is 12V or 18V; the third battery pack 400 is 36V, and the first battery pack 200 is 12V, 18V, or 24V.

[0216] At this time, multiple first battery packs 200 are connected to the bidirectional DC / AC converter via a first bidirectional DC / DC converter with step-down voltage, at least one third battery pack 400 is connected to the bidirectional DC / AC converter via a second bidirectional DC / DC converter with step-down voltage, and the second battery pack 300 is directly connected to the bidirectional DC / AC converter.

[0217] In this specific embodiment 6, the nominal voltage U2 of the second battery pack 300 > the nominal voltage U3 of the third battery pack 400 > the nominal voltage U1 of the first battery pack 200.

[0218] When the inverter 100 simultaneously receives power from the first battery pack 200, the second battery pack 300, and the third battery pack 400, it is preferable to receive the DC power from the second battery pack 300 for AC power output. When multiple second battery packs 300 are connected in parallel, the inverter 100 will only start receiving DC power from the multiple first battery packs 200 and / or the multiple third battery packs 400 when all the multiple second battery packs 300 are outputting to their cutoff voltage. At this time, the DC power from the multiple first battery packs 200 is directly output to the bidirectional DC / AC converter for AC power output.

[0219] Regarding the charging of inverter 100

[0220] Charging method 1: Inverter 100 is connected to an external AC power source.

[0221] Reference Figure 22 As shown, when the inverter 100 is connected to an external AC power source, the AC power from the external AC power source is converted and rectified into DC power by a bidirectional DC / AC converter. The DC power can either be stepped down by the first bidirectional DC / DC converter to charge the first battery pack 200, and / or stepped down by the second bidirectional DC / DC converter to charge the third battery pack 400, or it can directly charge the second battery pack 300.

[0222] When the inverter 100 simultaneously receives and installs the first battery pack 200, the second battery pack 300, and the third battery pack 400, the inverter 100 preferably charges the first battery pack 200 to quickly charge its lower nominal voltage to meet user needs. Then, it charges the third battery pack 400, and finally the second battery pack 300. During this process, switches controlled by a controller should be installed on the branches of the first battery pack 200, the second battery pack 300, and the third battery pack 400 (not shown in the figure). When multiple second battery packs 300 are connected in parallel, all of them can be charged simultaneously.

[0223] Charging method 2: Inverter 100 is not connected to an external AC power source.

[0224] Continue to refer to Figure 22 As shown, when the inverter 100 is not connected to an external AC power source, it simultaneously receives power from the first battery pack 200, the second battery pack 300, and the third battery pack 400.

[0225] When the controller detects that the first power parameter of the first battery pack 200 is lower than the first preset threshold and the second power parameter of the second battery pack 300 is higher than the second preset threshold, the controller controls the charging circuit between the first battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the first battery pack 200 through the charging circuit.

[0226] Similarly, when the controller detects that the first power parameter of the third battery pack 400 is lower than the first preset threshold and the second power parameter of the second battery pack 300 is higher than the second preset threshold, the controller controls the charging circuit between the third battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the third battery pack 400 through the charging circuit.

[0227] When the controller detects that the first power parameter of the first battery pack 200 is lower than the first preset threshold, and the first power parameter of the third battery pack 400 is lower than the first preset threshold, while the second power parameter of the second battery pack 300 is higher than the second preset threshold, the controller controls the second battery pack 300 to prioritize charging the first battery pack 200. After charging is completed, it then charges the third battery pack 400. More preferably, the second battery pack 300 can simultaneously meet the maximum charging power of multiple first battery packs 200 and multiple third battery packs 400, and charge them simultaneously.

[0228] Wherein, the first power parameter is voltage or remaining power; and / or, the second power parameter is voltage or remaining power.

[0229] Example 7

[0230] Reference Figure 23 As shown, this embodiment 7 is basically similar in principle to the above embodiment 6, except that: the inverter device 100 includes a bidirectional inverter, and multiple first battery packs 200 and third battery packs 400 are boosted by bidirectional DC / DC converters corresponding to each other and then output to bidirectional DC / AC converters. The bidirectional DC / DC converters and bidirectional DC / AC converters are combined to form a bidirectional inverter.

[0231] The second battery pack 300 is directly connected to the bidirectional DC / AC converter.

[0232] Regarding the inverter output of inverter 100

[0233] When the inverter 100 outputs AC power, it can either receive DC power from multiple first battery packs 200 and at least one third battery pack 400, with the DC power from the first battery packs 200 and the third battery pack 400 boosted by corresponding bidirectional DC / DC converters and then output to the bidirectional DC / AC converter for AC power output, or it can receive DC power from the second battery pack 300, with the DC power from the second battery pack 300 directly output to the bidirectional DC / AC converter for AC power output. It should be noted that there can be multiple second battery packs 300, such as multiple stacked second battery packs 300 connected in parallel as proposed in the above-mentioned [Energy Storage System Structure].

[0234] When the inverter 100 simultaneously receives power from the first battery pack 200, the second battery pack 300, and the third battery pack 400, the inverter 100 preferably selects to receive the DC power from the second battery pack 300 for AC power output. When multiple second battery packs 300 are connected in parallel, the inverter 100 only starts to receive the DC power from the multiple first battery packs 200 and the third battery pack 400 when all the multiple second battery packs 300 are outputting to their cutoff voltage. At this time, the DC power from the multiple first battery packs 200 is boosted by the corresponding bidirectional DC / DC converter and then output to the bidirectional DC / AC converter for AC power output.

[0235] Regarding the charging of inverter 100

[0236] Charging method 1: Inverter 100 is connected to an external AC power source.

[0237] Continue to refer to Figure 23 As shown, when the inverter 100 is connected to an external AC power source, the AC power from the external AC power source is converted and rectified into DC power by a bidirectional DC / AC converter. The DC power can be either stepped down by the bidirectional DC / DC converter to charge the first battery pack 200 and the third battery pack 400, or it can be directly used to charge the second battery pack 300.

[0238] When the inverter 100 simultaneously receives the first battery pack 200, the second battery pack 300, and the third battery pack 400, the inverter 100 preferably selects to charge the first battery pack 200 or the third battery pack 400 to quickly charge the first battery pack 200 or the third battery pack 400 with the lower nominal voltage to meet the user's needs. Then, the second battery pack 300 is charged. At this time, switches controlled by the controller should be installed on the branches of the first battery pack 200 and the second battery pack 300, which are not shown in the figure.

[0239] Charging method 2: Inverter 100 is not connected to an external AC power source.

[0240] Reference Figure 23 As shown, when the inverter 100 is not connected to an external AC power source, the inverter 100 simultaneously receives and installs a first battery pack 200, a second battery pack 300, and a third battery pack 400. When the controller detects that the first power parameter of the first battery pack 200 is lower than a first preset threshold and the second power parameter of the second battery pack 300 is higher than a second preset threshold, the controller controls the charging circuit between the first battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the first battery pack 200 through the charging circuit.

[0241] Similarly, when the controller detects that the first power parameter of the third battery pack 400 is lower than the first preset threshold and the second power parameter of the second battery pack 300 is higher than the second preset threshold, the controller controls the charging circuit between the third battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the third battery pack 400 through the charging circuit.

[0242] When the controller detects that the first power parameter of the first battery pack 200 is lower than the first preset threshold, and the first power parameter of the third battery pack 400 is lower than the first preset threshold, while the second power parameter of the second battery pack 300 is higher than the second preset threshold, the controller controls the second battery pack 300 to prioritize charging the first battery pack 200. After charging is completed, it then charges the third battery pack 400. More preferably, the second battery pack 300 can simultaneously meet the maximum charging power of multiple first battery packs 200 and multiple third battery packs 400, and charge them simultaneously.

[0243] Example 8

[0244] Reference Figure 24 As shown, Inverter 100 includes a bidirectional inverter, and multiple first battery packs 200 are directly connected to a bidirectional DC / AC converter.

[0245] The second battery pack 300 is stepped down by the corresponding first bidirectional DC / DC converter and then connected to the bidirectional DC / AC converter. The third battery pack 400 is stepped down by the corresponding second bidirectional DC / DC converter and then connected to the bidirectional DC / AC converter. The bidirectional DC / DC converter and the bidirectional DC / AC converter are combined to form a bidirectional inverter.

[0246] Regarding the inverter output of inverter 100

[0247] When the inverter 100 outputs AC power, it can either receive DC power from multiple first battery packs 200 and third battery packs 400, with the DC power outputs of the first battery packs 200 and third battery packs 400 connected to a bidirectional DC / AC converter for AC power output, or it can receive DC power from a second battery pack 300, with the DC power from the second battery pack 300 being stepped down by a bidirectional DC / DC converter and then output to a bidirectional DC / AC converter for AC power output. It should be noted that there can be multiple second battery packs 300, such as multiple stacked second battery packs 300 connected in parallel as proposed in the above-mentioned [Energy Storage System Structure].

[0248] When the inverter 100 simultaneously receives power from the first battery pack 200, the second battery pack 300, and the third battery pack 400, the inverter 100 preferably selects to receive the DC power from the second battery pack 300 for AC power output. When multiple second battery packs 300 are connected in parallel, the inverter 100 only starts to receive DC power from the first battery pack 200 and the third battery pack 400 when all multiple second battery packs 300 are outputting to their cutoff voltage.

[0249] Regarding the charging of inverter 100

[0250] Charging method 1: Inverter 100 is connected to an external AC power source.

[0251] Reference Figure 24 As shown, when the inverter 100 is connected to an external AC power source, the AC power from the external AC power source is converted and rectified into DC power by a bidirectional DC / AC converter. The DC power can be boosted by the bidirectional DC / DC converter to charge the second battery pack 300 or the third battery pack 400, or it can be directly charged to the first battery pack 200.

[0252] When the inverter 100 simultaneously receives and installs the first battery pack 200, the second battery pack 300, and the third battery pack 400, the inverter 100 preferably selects to charge the first battery pack 200 and / or the third battery pack 400 to quickly charge the first battery pack 200 and / or the third battery pack 400 with their lower nominal voltages to meet user needs. Then, the second battery pack 300 is charged. During this process, switches controlled by a controller should be installed on the branches of both the first battery pack 200 and the second battery pack 300 (not shown in the figure). When multiple second battery packs 300 are connected in parallel, all of them can be charged; alternatively, the first battery pack 200 and the second battery pack 300 can be charged alternately.

[0253] Charging method 2: Inverter 100 is not connected to an external AC power source.

[0254] Reference Figure 15 As shown, when the inverter 100 is not connected to an external AC power source, the inverter 100 simultaneously receives and installs a first battery pack 200, a second battery pack 300, and a third battery pack 400. When the controller detects that the first power parameter of the first battery pack 200 is lower than a first preset threshold and the second power parameter of the second battery pack 300 is higher than a second preset threshold, the controller controls the charging circuit between the first battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the first battery pack 200 through the charging circuit.

[0255] Similarly, when the controller detects that the first power parameter of the third battery pack 400 is lower than the first preset threshold and the second power parameter of the second battery pack 300 is higher than the second preset threshold, the controller controls the charging circuit between the third battery pack 200 and the second battery pack 300 to open, and the second battery pack 300 charges the third battery pack 400 through the charging circuit.

[0256] When the controller detects that the first power parameter of the first battery pack 200 is lower than the first preset threshold, and the first power parameter of the third battery pack 400 is lower than the first preset threshold, while the second power parameter of the second battery pack 300 is higher than the second preset threshold, the controller controls the second battery pack 300 to prioritize charging the first battery pack 200. After charging is completed, it then charges the third battery pack 400. More preferably, the second battery pack 300 can simultaneously meet the maximum charging power of multiple first battery packs 200 and multiple third battery packs 400, and charge them simultaneously.

[0257] [Energy Storage System Operation Mode]

[0258] Example 1

[0259] Reference Figure 25 As shown, the energy storage system described above can be applied to homes to form a home energy storage system. This energy storage system can receive direct current from solar panels for solar charging and storage.

[0260] Home energy storage system operating modes:

[0261] Mode 1: Photovoltaics provide energy storage, and surplus electricity is fed into the grid. When there is sufficient sunlight, part of the electricity generated by the solar cell array is used to meet household electricity needs, and the other part is stored in the battery pack of the energy storage system. If there is any surplus electricity, it is fed into the public grid through a grid-connected inverter.

[0262] Mode 2: Photovoltaics provide energy storage and power to users. In this mode, the electricity generated by the solar array first meets the electricity needs of households, and any excess electricity is stored in the battery packs of the energy storage system. If the battery packs of the energy storage system are also full, the excess electricity can be fed into the public power grid.

[0263] Mode 3: Photovoltaics provide only partial energy storage. In this mode, the electricity generated by the solar cell array is mainly used to meet household electricity needs and is stored in the battery packs of the energy storage system, without being fed into the public power grid.

[0264] In any of the above modes, the user can also separate one or more of the first battery pack 200, the second battery pack 300, and the third battery pack 400 from the energy storage system to meet the needs of portable power tools in the user's home, such as pruning machines, lawn mowers, garden blowers, chainsaws, lawn mowers, snow sweepers, electric drills, screwdrivers, grinders, etc.

[0265] Specifically, such as Figure 26 As shown, the user separates the first battery pack 200 from the energy storage system to supply power to electrical equipment of the first voltage series, particularly cordless power tools of the first voltage series, such as... Figure 26 The system includes electric drills, pruning machines, chainsaws, lawnmowers, etc.; users can also separate a third battery pack 400 from the energy storage system to supply power to devices in the second voltage series, especially cordless power tools coupled to the second voltage series, such as circular saws, lawnmowers, garden blowers, etc., as shown in the figure. In addition, users can separate a second battery pack 300 from the energy storage system to supply power to devices in the third voltage series, especially cordless power tools coupled to the third voltage series, such as ride-on lawnmowers, riding tools, snowplows, especially two-step snowplows, as shown in the figure. Furthermore, the energy storage system itself can also supply AC power to devices.

[0266] Operating modes of outdoor energy storage systems:

[0267] Mode 1: Reference Figure 27 As shown, a user carries an inverter 100, a first battery pack 200, and a third battery pack 400 to work outside the system. The user can disconnect the first battery pack 200 from the energy storage system to supply power to devices operating at a first voltage level, particularly cordless power tools. The user can also disconnect the third battery pack 400 from the energy storage system to supply power to devices operating at a second voltage level, particularly cordless power tools. Furthermore, the energy storage system itself can also supply power to AC devices.

[0268] Mode 2: Reference Figure 28As shown, a user carries an inverter 100, a first battery pack 200, a third battery pack 400, and a second battery pack 300 for outdoor work. The user can separate the first battery pack 200 from the energy storage system to supply power to electrical equipment of the first voltage series, especially cordless power tools coupled to the first voltage series. The user can also separate the third battery pack 400 from the energy storage system to supply power to electrical equipment of the second voltage series, especially cordless power tools coupled to the second voltage series. The user can separate the second battery pack 300 from the energy storage system to supply power to electrical equipment of the third voltage series, especially cordless power tools coupled to the third voltage series, such as ride-on lawnmowers, riding tools, snowplows, especially two-step snowplows, as shown in the figure. In addition, the energy storage system itself can also supply power to AC electrical equipment.

[0269] When the second battery pack 300 is connected to the inverter 100, it can also charge the first battery pack 200 and the third battery pack 400.

[0270] Mode 3: Reference Figure 29 As shown, a user carries an inverter 100, a first battery pack 200, a third battery pack 400, and multiple second battery packs 300 for outdoor work. The user can separate the first battery pack 200 from the energy storage system to supply power to electrical equipment of the first voltage series, especially cordless power tools coupled to the first voltage series. The user can also separate the third battery pack 400 from the energy storage system to supply power to electrical equipment of the second voltage series, especially cordless power tools coupled to the second voltage series. The user can also separate the second battery packs 300 from the energy storage system to supply power to electrical equipment of the third voltage series, especially cordless power tools coupled to the third voltage series, such as ride-on lawnmowers, riding tools, snowplows, especially two-step snowplows, as shown in the figure. In addition, the energy storage system itself can also supply power to AC electrical equipment.

[0271] When the second battery pack 300 is connected to the inverter 100, it can also charge the first battery pack 200 and the third battery pack 400.

[0272] Example 2

[0273] Reference Figure 30 As shown, the energy storage system described above can be applied to homes to form a home energy storage system. This energy storage system can receive direct current from solar panels for solar charging and storage.

[0274] This embodiment 2 is basically similar in structure and principle to the above embodiment 1, except that: in this embodiment 2, solar energy and mains power are connected through a second inverter device 600.

[0275] Home energy storage system operating modes:

[0276] Mode 1: Photovoltaics provide energy storage, and surplus electricity is fed into the grid. When there is sufficient sunlight, part of the electricity generated by the solar cell array is used to meet household electricity needs, and the other part is stored in the battery pack of the energy storage system. If there is any surplus electricity, it is fed into the public grid through a grid-connected inverter.

[0277] Mode 2: Photovoltaics provide energy storage and power to users. In this mode, the electricity generated by the solar array first meets the electricity needs of households, and any excess electricity is stored in the battery packs of the energy storage system. If the battery packs of the energy storage system are also full, the excess electricity can be fed into the public power grid.

[0278] Mode 3: Photovoltaics provide only partial energy storage. In this mode, the electricity generated by the solar cell array is mainly used to meet household electricity needs and is stored in the battery packs of the energy storage system, without being fed into the public power grid.

[0279] In any of the above modes, the user can also detach one or more of the first battery pack 200, the second battery pack 300, and the third battery pack 400 from the energy storage system to meet the needs of portable power tools in the user's home, such as pruning machines, lawn mowers, garden blowers, chainsaws, snowplows, electric drills, screwdrivers, and grinders. In this case, the user can detach one or more of the first battery pack 200, the second battery pack 300, and the third battery pack 400 from the energy storage system without affecting the home energy storage system. The home energy storage system continues to operate through the fourth battery pack 500. The fourth battery pack 500 is generally a high-capacity battery pack, such as a battery pack with a nominal capacity of 5 kWh, which is usually fixed indoors and not taken outside.

[0280] Operating modes of outdoor energy storage systems:

[0281] Mode 1: Reference Figure 31 As shown, a user carries an inverter 100, a first battery pack 200, and a third battery pack 400 to work outside the system. The user can disconnect the first battery pack 200 from the energy storage system to supply power to devices operating at a first voltage level, particularly cordless power tools. The user can also disconnect the third battery pack 400 from the energy storage system to supply power to devices operating at a second voltage level, particularly cordless power tools. Furthermore, the energy storage system itself can also supply power to AC devices.

[0282] At this time, the home energy storage system is operating as follows: Figure 32 As shown.

[0283] Mode 2: Reference Figure 33 As shown, a user carries an inverter 100, a first battery pack 200, a third battery pack 400, and a second battery pack 300 for outdoor work. The user can separate the first battery pack 200 from the energy storage system to supply power to electrical equipment of the first voltage series, especially cordless power tools coupled to the first voltage series. The user can also separate the third battery pack 400 from the energy storage system to supply power to electrical equipment of the second voltage series, especially cordless power tools coupled to the second voltage series. The user can separate the second battery pack 300 from the energy storage system to supply power to electrical equipment of the third voltage series, especially cordless power tools coupled to the third voltage series, such as ride-on lawnmowers, riding tools, snowplows, especially two-step snowplows, as shown in the figure. In addition, the energy storage system itself can also supply power to AC electrical equipment.

[0284] When the second battery pack 300 is connected to the inverter 100, it can also charge the first battery pack 200 and the third battery pack 400.

[0285] At this time, the home energy storage system is operating as follows: Figure 34 As shown.

[0286] Mode 3: Reference Figure 35 As shown, a user carries an inverter 100, a first battery pack 200, a third battery pack 400, and multiple second battery packs 300 for outdoor work. The user can separate the first battery pack 200 from the energy storage system to supply power to electrical equipment of the first voltage series, especially cordless power tools coupled to the first voltage series. The user can also separate the third battery pack 400 from the energy storage system to supply power to electrical equipment of the second voltage series, especially cordless power tools coupled to the second voltage series. The user can also separate the second battery packs 300 from the energy storage system to supply power to electrical equipment of the third voltage series, especially cordless power tools coupled to the third voltage series, such as ride-on lawnmowers, riding tools, snowplows, especially two-step snowplows, as shown in the figure. In addition, the energy storage system itself can also supply power to AC electrical equipment.

[0287] When the second battery pack 300 is connected to the inverter 100, it can also charge the first battery pack 200 and the third battery pack 400.

[0288] At this time, the home energy storage system is operating as follows: Figure 36 As shown.

[0289] In this embodiment, those skilled in the art will know that, In the working mode of outdoor energy storage systems When users carry inverter 100, first battery pack 200, third battery pack 400, and multiple second battery packs 300, the home energy storage system will remain in an effective working state while they are away from home.

[0290] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A home energy storage system, characterized in that, include: An inverter (100) includes a housing (10) and a DC / DC converter and a DC / AC converter located within the housing (10); At least one first battery pack (200) and at least one second battery pack (300) are detachably mounted on the housing (10), wherein the first battery pack (200) is a low nominal voltage battery pack and the second battery pack (300) is a high nominal voltage battery pack. A solar charging interface, configured on the inverter (100) and adapted to connect a solar panel, is provided to store photovoltaic power into the first battery pack (200) and / or the second battery pack (300) via the DC / DC converter; wherein, The DC / AC converter is configured to receive DC power from the first battery pack (200) and / or the second battery pack (300) and output AC power for use by household loads.

2. The home energy storage system according to claim 1, characterized in that: The DC / AC converter is also adapted to receive photovoltaic power and transmit excess power to the public power grid when there is a surplus of photovoltaic power.

3. The home energy storage system according to claim 1 or 2, characterized in that, Also includes: A wireless power metering socket is connected between the AC input bus and the AC electrical equipment to monitor the power consumption of the AC electrical equipment.

4. The home energy storage system according to claim 1, characterized in that: In the off-grid state, the inverter and the first battery pack (200) and / or the second battery pack (300) are suitable for carrying out outdoor energy storage.

5. The home energy storage system according to claim 1 or 4, characterized in that: The second battery pack (300) has a higher nominal battery capacity than the first battery pack (200), and in the off-grid state, the second battery pack (300) is adapted to charge the first battery pack (200) through the inverter (100).

6. The home energy storage system according to claim 5, characterized in that: The second battery pack (300) is adapted to support the stacking and expansion of multiple battery packs of the same type via a parallel interface (34).

7. The home energy storage system according to claim 5, characterized in that: The first battery pack (200) and / or the second battery pack (300) are adapted to be separated from the housing (10) to power a first DC power device and / or a second DC power device, wherein the first DC power device and the second DC power device are power devices of different voltage series.

8. The home energy storage system according to claim 4, characterized in that, Also includes: A third battery pack (400) suitable for storing photovoltaic power, the third battery pack (400) being detachably mounted on the housing (10); The third battery pack (400) and the first battery pack (200) are low-voltage battery packs with different nominal voltages.

9. The home energy storage system according to claim 8, characterized in that: The third battery pack (400) is adapted to be detached from the housing (10) for use in powering a third DC power device.

10. The home energy storage system according to claim 8, characterized in that: The DC / AC converter is configured to selectively receive DC power from a single battery pack (200), a second battery pack (300), and a third battery pack (400), or to simultaneously select multiple battery packs, and to output AC power through an inverter.

11. The home energy storage system according to claim 3, characterized in that: The system supports three operating modes: Mode 1: Photovoltaic power is prioritized for storage in battery banks, with surplus power connected to the grid; Mode 2: Solar power is prioritized for household loads, with any surplus stored in battery banks; Mode 3: Photovoltaic power is used only for household loads and battery storage, and is not connected to the grid.

12. A home energy storage system, characterized in that, include: First inverter (100); A portable battery pack adapted to and connected to the first inverter (100); The second inverter (600) is suitable for connection to solar energy and mains power; A fourth battery pack (500) is adapted to be connected to the second inverter (600), and the fourth battery pack (500) is electrically connected in parallel with the portable battery pack; The second inverter (600) and the fourth battery pack (500) are adapted for home fixed installation; A solar charging interface is configured on the second inverter (600) and adapted to connect a solar panel to store photovoltaic power in the fourth battery pack (500) and / or the portable battery pack; The second inverter (600) is also configured to receive DC power from the fourth battery pack (500) and / or the portable battery pack and output AC power for use by household loads.

13. The home energy storage system according to claim 12, characterized in that: The second inverter (600) is equipped with rollers, and the fourth battery pack (500) is stacked on top of the second inverter (600).

14. The home energy storage system according to claim 13, characterized in that: The portable battery pack includes a first battery pack (200) and a second battery pack (300), the second battery pack (300) being stacked on top of the fourth battery pack (500) and kept electrically in parallel.

15. The home energy storage system according to claim 12, characterized in that: The first inverter (100) and the portable battery pack are suitable for disassembly and separation for outdoor energy storage.

16. The home energy storage system according to claim 12 or 15, characterized in that: The system supports the following modes: The user can detach the portable battery pack to power power tools, while the fourth battery pack (500) continuously powers household loads.

17. The home energy storage system according to claim 12 or 15, characterized in that: The system supports the following modes: Take the first inverter (100) and the portable battery pack with you when you go out, and disconnect the battery pack to power the power tools.

18. The home energy storage system according to claim 17, characterized in that: The portable battery pack includes at least a first battery pack (200) and a second battery pack (300), wherein when the second battery pack (300) is connected to the first inverter (100), it is adapted to charge the first battery pack (200).

19. The home energy storage system according to claim 18, characterized in that: The portable battery pack also includes a third battery pack (400), which is detachably mounted to the first inverter (100); The third battery pack (400) and the first battery pack (200) are low-voltage battery packs with different nominal voltages, and the second battery pack (300) is a high-nominal-voltage battery pack. The second battery pack (300) is adapted to charge the first battery pack (200) and / or the third battery pack (400) through the first inverter (100).

20. The home energy storage system according to claim 12, characterized in that: The portable battery pack includes a second battery pack (300), which is adapted to support the stacking and expansion of multiple battery packs of the same type through a parallel interface (34) and is electrically connected in parallel with the fourth battery pack (500) through the parallel interface (34).

21. The home energy storage system according to claim 20, characterized in that: The fourth battery pack (500) has the same nominal voltage as the second battery pack (300) and / or the nominal capacity of the fourth battery pack (500) is greater than the nominal capacity of the second battery pack (300).

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