Energy storage bidirectional power supply and power conversion device

Abstract

The invention discloses an energy storage bidirectional power supply and power conversion device, and the device comprises an inner housing which comprises a first air inlet and a first air outlet, and a first air flow channel is formed between a battery pack and the inner housing. The path of the first airflow channel comprises that airflow entering the inner shell from the first air inlet enters the battery pack and then is discharged out of the battery bin from the first air outlet. The outer shell comprises a second air inlet and a second air outlet, and a second airflow channel is formed between the inner shell and the outer shell. The inverter circuit board is located between the inner shell and the outer shell, at least part of the inverter circuit board is located in the second airflow channel, and airflow entering the second airflow channel from the second air inlet passes through the inverter circuit board and then is exhausted out of the outer shell from the second air outlet. And air flow exhausted from the first air outlet can be exhausted out of the outer shell through the second air outlet. According to the energy storage bidirectional power supply, heat dissipation is carried out on the inverter circuit board through the second air outlet, and meanwhile heat dissipation and discharge are carried out on the first air outlet of the battery bin.

Description

[Technical Field]

[0001] This application relates to the field of energy storage technology, and in particular to a bidirectional energy storage power supply and power conversion device. [Background Technology]

[0002] New energy-powered garden tools include ride-on lawnmowers, smart lawnmowers, hedge trimmers, and industrial fans. However, due to the wide variety of garden tools, different chargers are required for different tools, which can lead to a poor user experience and increase operating costs.

[0003] Traditional energy storage or charging devices have complex ventilation paths for heat dissipation. Hot airflow often needs to pass through multiple bends in the ventilation path to exit the device. With multiple bends, the kinetic energy loss of hot airflow is relatively large, the heat dissipation efficiency is low, and the heat dissipation effect is poor. Moreover, when hot airflow passes through multiple ventilation paths, some heat is transferred to the side walls of the pipes and then dissipated into the energy storage through the side walls, leaving a lot of heat inside the device. In this way, the setting of multiple bend ventilation paths also forms a heat insulation layer inside the device, which is not conducive to heat dissipation and affects the heat dissipation effect.

[0004] Moreover, the traditional energy storage or charger equipment has its heat dissipation vents set up opposite each area, which makes the structural design of the entire equipment complex in terms of heat dissipation and cooling, and makes production and assembly more time-consuming and labor-intensive, which is not conducive to mass production.

[0005] Therefore, it is indeed necessary to provide an improved outdoor power device to overcome the shortcomings of the prior art. [Summary of the Invention]

[0006] In view of the shortcomings of the existing technology, the purpose of this application is to provide a bidirectional energy storage power supply with good heat dissipation;

[0007] In addition, a power conversion device with good heat dissipation is provided.

[0008] The technical solution adopted by this application to solve the problems of the prior art is: a bidirectional energy storage power supply, comprising:

[0009] The inner housing is configured to be detachably assembled to the battery pack. The inner housing includes a first air inlet and a first air outlet. A first airflow channel is formed between the battery pack and the inner housing. The path of the first airflow channel includes: airflow entering the inner housing from the first air inlet enters the battery pack and then exits the battery compartment from the first air outlet.

[0010] An outer shell is disposed outside the inner shell, the outer shell includes a second air inlet and a second air outlet, and a second airflow channel is formed between the inner shell and the outer shell;

[0011] An inverter circuit board is configured to convert the electrical energy of the battery pack into external discharge and / or convert external electrical energy into charging of the battery pack. The inverter circuit board is located between the inner housing and the outer housing and is at least partially located within the second airflow channel. Airflow entering the second airflow channel from the second air inlet passes through the inverter circuit board and is discharged from the outer housing from the second air outlet.

[0012] The airflow discharged from the first air outlet can be discharged from the outer casing through the second air outlet.

[0013] In some embodiments, the battery pack includes a battery pack air inlet and a battery pack air outlet. Airflow in the first airflow channel enters the battery pack through the battery pack air inlet, passes through the battery cells in the battery pack, and then exits the battery pack through the battery pack air outlet and exits the inner casing through the first air outlet.

[0014] In some embodiments, the inner housing includes a first side plate and a second side plate that are respectively disposed thereon. A first air outlet is disposed on both the first side plate and the second side plate. A cooling fan for exhausting air to the outside of the inner housing is disposed on the first air outlet. The battery pack is located between the two first air outlets.

[0015] In some embodiments, the battery pack is provided with a first terminal, and the inner shell is provided with a second terminal. When the battery pack is fitted into the inner shell, the first terminal and the second terminal are electrically connected. The airflow entering the inner shell from the first air inlet passes through the first terminal and the second terminal and is discharged from the first air outlet.

[0016] In some embodiments, in the battery pack assembly direction, the first terminal and the second terminal are located between the first air inlet and the first air outlet.

[0017] In some embodiments, the inner housing is a receiving cavity with an opening, the battery pack is detachably disposed within the receiving cavity, and the first air inlet is at least a portion of the opening.

[0018] In some embodiments, a control circuit board capable of controlling the operation of the inverter circuit board and an output circuit board capable of receiving power from at least one of the control circuit board and / or the inverter circuit board are further provided between the inner housing and the outer housing. The airflow entering the second airflow channel from the second air inlet flows through the control circuit board, the output circuit board and the inverter circuit board and is discharged from the outer housing through the second air outlet.

[0019] In some embodiments, a receiving space is formed between the inner housing and the outer housing, and the second airflow passage is at least partially located in the receiving space, the receiving space comprising:

[0020] A first space is provided on one side of the inner housing, and the control circuit board is located within the first space;

[0021] A second space is disposed on the opposite side of the inner housing corresponding to the first space, and the output circuit board is located in the second space; and,

[0022] A third space is disposed between the first space and the second space, and the inverter circuit board is located in the third space. The third space is located between the first space and the second space and below the inner housing.

[0023] The airflow entering the second airflow channel through the second air inlet passes through the control circuit board, output circuit board and inverter circuit board in the accommodating space and is then discharged through the second air outlet.

[0024] In some embodiments, the housing includes a third side plate and a fourth side plate respectively, the second air inlet is disposed on the third side plate, the second air outlet is disposed on the fourth side plate, and the control circuit board, the output circuit board and the inverter circuit board are located between the second air inlet and the second air outlet.

[0025] In some embodiments, at least one of the second air inlet and the second air outlet is equipped with a cooling fan.

[0026] In some embodiments, the battery pack is located above the inverter circuit board.

[0027] In some embodiments, the first air outlet is disposed adjacent to the second air outlet.

[0028] In some embodiments, the inner shell includes a first side plate and a second side plate respectively, and a first air outlet is provided on both the first side plate and the second side plate. The outer shell includes a third side plate and a fourth side plate respectively, a second air inlet is provided on the third side plate, and a second air outlet is provided on the fourth side plate. The first air outlet is located in the same straight line direction as the first air inlet, the second air inlet and the second air outlet in its air outlet direction.

[0029] In some embodiments, the first air outlet is disposed adjacent to the second airflow channel, and a guide member is provided at the first air outlet to guide the airflow discharged from the first air outlet to the second air outlet.

[0030] In some embodiments, the flow guide is a tubular structure or a plate-like structure.

[0031] In some embodiments, the flow guide is provided with a wire harness limiting portion, the inner housing is provided with an external terminal for electrical connection with the battery pack, a wire harness is connected between the external terminal and the control circuit board, the wire harness is limited by the wire harness limiting portion, and the wire harness is located outside the flow guide.

[0032] In some embodiments, the inner housing forms a receiving cavity configured to receive two first-size battery packs or one second-size battery pack.

[0033] In some embodiments, inverter components are disposed on the inverter circuit board, and the inverter components are located within the second airflow channel.

[0034] This application also provides a bidirectional energy storage power source, including:

[0035] An inner housing is configured to detachably house a battery pack. The inner housing includes a first air inlet and a first air outlet through which cooling airflow passes, wherein airflow entering the inner housing through the first air inlet enters the battery pack and exits the battery compartment through the first air outlet.

[0036] The outer casing includes a second air inlet and a second air outlet;

[0037] An inverter module is located between the inner housing and the outer housing. The inverter module is configured to convert the electrical energy of the battery pack into external discharge and / or convert external electrical energy into charging of the battery pack. The airflow entering the outer housing through the second air inlet flows through the inverter module and is discharged from the outer housing through the second air outlet.

[0038] The airflow discharged from the first air outlet can be discharged from the outer casing through the second air outlet.

[0039] In some embodiments, the first air outlet and the second air outlet are disposed adjacent to each other, and a cooling fan is disposed adjacent to the first air outlet and the second air outlet. The cooling fan is configured to discharge airflow from the inner housing and between the inner housing and the outer housing through the second air outlet into the outer housing.

[0040] In some embodiments, the cooling fan is located between the first air outlet and the second air outlet in the air outlet direction of the first air outlet or the second air outlet.

[0041] A power conversion device includes: an inner housing configured to be detachably mounted on a battery pack, the inner housing including a first air inlet and a first air outlet, a first airflow channel forming between the battery pack and the inner housing, the path of the first airflow channel including: airflow entering the inner housing from the first air inlet entering the battery pack and then exiting the battery compartment from the first air outlet;

[0042] An outer shell is disposed outside the inner shell, the outer shell includes a second air inlet and a second air outlet, and a second airflow channel is formed between the inner shell and the outer shell;

[0043] An inverter circuit board is configured to convert the electrical energy of the battery pack into external discharge and / or convert external electrical energy into charging of the battery pack. The inverter circuit board is located between the inner housing and the outer housing and is at least partially located within the second airflow channel. Airflow entering the second airflow channel from the second air inlet passes through the inverter circuit board and is discharged from the outer housing from the second air outlet.

[0044] The first air outlet is located adjacent to the second air outlet, and the airflow discharged from the first air outlet can be discharged from the outer casing through the second air outlet.

[0045] Compared with the prior art, this application has the following beneficial effects:

[0046] This application discloses a bidirectional energy storage power supply, comprising a battery compartment and an outer casing. An inverter circuit board is disposed between the battery compartment and the outer casing. A first air inlet and a first air outlet are provided on the battery compartment, which houses the battery pack, forming a first airflow channel between the battery pack and the battery compartment. The path of the first airflow channel includes: airflow entering the battery compartment through the first air inlet, entering the battery pack, and then exiting the battery compartment through the first air outlet. A second air inlet and a second air outlet are provided on the outer casing, forming a second airflow channel between the battery compartment and the outer casing. Airflow entering the second airflow channel through the second air inlet passes through the inverter circuit board and exits the outer casing through the second air outlet. Airflow exiting through the first air outlet can also exit the outer casing through the second air outlet. This configuration allows the second air outlet to discharge airflow passing through the inverter circuit board, while also discharging airflow from the first air outlet for cooling the battery pack. This shared cooling vent configuration for different areas ultimately gathers the hot airflow from different areas into a single outlet, eliminating the need for separate outlets for each area requiring cooling. This reduces kinetic energy loss during the movement of hot airflow, simplifies the equipment structure, and provides excellent heat dissipation.

[0047] In addition, the first airflow channel and the second airflow channel converge at the second air outlet. The two airflow channels can interact to drive the airflow of the other airflow channel, which makes the heat dissipation efficiency better and can indirectly save the power consumption of the cooling fan. Moreover, the lower temperature area of ​​one of the two airflow channels at the convergence point can absorb the air temperature of the higher temperature area, so that the air in the higher temperature area can be partially absorbed by the air in the lower temperature area, making the heat dissipation effect of the higher temperature area better.

[0048] The power conversion device of this application includes a battery compartment and a housing. The battery compartment is at least partially housed within the housing, and an inverter module is disposed between the battery compartment and the housing. The battery compartment is detachably fitted with a battery pack. The battery compartment has a first air inlet and a first air outlet for heat dissipation of the battery pack. Airflow entering the battery compartment through the first air inlet enters the battery pack and exits the battery compartment through the first air outlet. The housing has a second air inlet and a second air outlet. Airflow entering the housing through the second air inlet flows through the inverter module and exits the housing through the second air outlet. Furthermore, airflow exiting the housing through the first air outlet can also exit the housing through the second air outlet. This arrangement allows the second air outlet to discharge airflow flowing through the power conversion circuit board and also to discharge airflow from the first air outlet for heat dissipation of the battery pack.

[0049] In addition, the first airflow channel and the second airflow channel converge at the second air outlet. The two airflow channels can interact to drive the airflow of the other airflow channel, which makes the heat dissipation efficiency better and can indirectly save the power consumption of the cooling fan. Moreover, the lower temperature area of ​​one of the two airflow channels at the convergence point can absorb the air temperature of the higher temperature area, so that the air in the higher temperature area can be partially absorbed by the air in the lower temperature area, making the heat dissipation effect of the higher temperature area better. [Image Description]

[0050] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings:

[0051] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the bidirectional energy storage power supply (power conversion device) of this application;

[0052] Figure 2 This is a three-dimensional structural schematic diagram of an energy storage bidirectional power supply (power conversion device) according to an embodiment of this application from another angle;

[0053] Figure 3 This is a schematic diagram of the structure of the bidirectional energy storage power supply (power conversion device) after removing the cover, as per this application;

[0054] Figure 4 This is a top view of the bidirectional energy storage power supply (power conversion device) of this application;

[0055] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of the middle AA surface;

[0056] Figure 6 This is a right-side structural schematic diagram of the bidirectional energy storage power supply (power conversion device) of this application;

[0057] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure of the middle BB surface;

[0058] Figure 8 This is a cross-sectional structural schematic diagram of the bidirectional energy storage power supply (power conversion device) of this application;

[0059] Figure 9 This is a schematic diagram of the internal structure of the bidirectional energy storage power supply (power conversion device) of this application;

[0060] Figure 10 This is a schematic diagram of the locking structure, flow guide, and first cooling fan of the bidirectional energy storage power supply (power conversion device) of this application;

[0061] Figure 11This is a schematic diagram of the installation structure of the protective net assembly of the bidirectional energy storage power supply (power conversion device) of this application;

[0062] Figure 12 This is a schematic diagram of the protective mesh assembly and outer casing with slots of the bidirectional energy storage power supply (power conversion device) of this application;

[0063] Figure 13 This is a schematic diagram of the main structure of the bidirectional energy storage power supply (power conversion device) of this application;

[0064] Figure 14 yes Figure 13 Enlarged view of section A;

[0065] Figure 15 This is a perspective view showing the bottom structure of the bidirectional energy storage power supply (power conversion device) of this application;

[0066] Figure 16 This is a perspective view of the bottom structure of the bidirectional energy storage power supply (power conversion device) of this application from another angle;

[0067] Figure 17 yes Figure 16 Enlarged view of section B;

[0068] Figure 18 This is a schematic diagram of the hinge assembly of the bidirectional energy storage power supply (power conversion device) of this application;

[0069] Figure 19 This is a schematic diagram of the structure of the energy conversion circuit board (inverter circuit board) of the bidirectional energy storage power supply (power conversion device) of this application located between the wheels;

[0070] Figure 20 This is a perspective view of the bottom structure of the energy storage bidirectional power supply (power conversion device) of this application from another angle;

[0071] Figure 21 This is a schematic diagram of the structure of the walking wheel in this application;

[0072] Figure 22 This is a schematic diagram of the structure of the storage compartment cover of the bidirectional energy storage power source (power conversion device) of this application when it is open;

[0073] Figure 23 This is a schematic diagram of the extended pull rod structure of the bidirectional energy storage power supply (power conversion device) of this application;

[0074] Figure 24 This is a structural schematic diagram of the pull rod of the bidirectional energy storage power supply (power conversion device) of this application at another angle;

[0075] Figure 25This is a schematic diagram of the installation of a second-specification battery pack in the bidirectional energy storage power supply (power conversion device) of this application;

[0076] Figure 26 This is a schematic diagram of the installation of two first-specification battery packs in the bidirectional energy storage power supply (power conversion device) of this application;

[0077] Figure 27 This is a schematic diagram of gravity analysis of the bidirectional energy storage power source of this application in a tilted moving state;

[0078] Figure 28 This is a force analysis diagram of the bidirectional energy storage power source of this application from the tilted state to the horizontal state;

[0079] Figure 29 This is a logical block diagram showing the connection relationships of the ports in this application. [Detailed Implementation]

[0080] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0081] Please see Figures 1 to 29 The image shows the bidirectional energy storage power supply disclosed in this application, which includes a battery pack 300, a battery compartment 100, a housing 200, and an energy conversion circuit board 231.

[0082] like Figures 1 to 3 , Figure 5 , Figures 7 to 9As shown, the battery compartment 100 is configured to accommodate the battery pack 300, and the battery compartment 100 has a first vent for heat exchange between its interior and exterior. The battery compartment 100 is at least partially housed within a housing 200, and the housing 200 has a second vent for heat exchange between its interior and exterior. A power conversion circuit board 231 is disposed within the housing space formed by the battery compartment 100 and the housing 200, and the power conversion circuit board 231 is configured to at least convert and output the electrical energy of the battery pack 300. In the ventilation direction of the second vent, the projection of the first vent at least partially overlaps with the projection of the second vent. In this application, by setting the first vent for heat dissipation of the battery pack 300 and the second vent for heat dissipation of the power conversion circuit board 231 in the housing space to at least partially overlap along the ventilation direction of the second vent, this arrangement facilitates the battery pack 300 located in the battery compartment 100 inside the housing 200 to expel heat with the airflow through the first vent and then through the second vent on the housing 200. The second vent also serves to dissipate heat from the power conversion circuit board 231, so that the heat generated by the battery pack 300 and the heat generated by the power conversion circuit board 231 can be discharged to the outside of the bidirectional power storage power supply through the second vent with the airflow.

[0083] Please also refer to Figures 4 to 9 In some embodiments, the battery pack 300 includes a battery casing and battery cells 301 disposed within the battery casing. The casing of the battery pack 300 has a third vent for dissipating heat from the battery cells 301. In the ventilation direction of the second vent, the projection of the third vent at least partially overlaps with the projection of the second vent. This allows heat generated by the battery cells 301 within the battery casing to be expelled from the battery casing as hot airflow through the third vent and flow along a straight path into the battery compartment 100. Then, it flows along a straight path through the first vent and exits the battery compartment 100 into the outer casing 200, before finally flowing along a straight path through the second vent and exiting the outer casing 200. Furthermore, in the ventilation direction of the second vent, the projection of the third vent at least partially overlaps with the projection of the first vent, combining the aforementioned at least partial overlap of the projections of the first and second vents. This configuration helps to directly dissipate heat from the battery pack 300 to the outside. Compared to the existing technology that sets up multiple bends in the ventilation path, my solution sets the ventilation direction of multiple vents on a straight path to directly discharge hot air, which helps to quickly dissipate heat from the battery pack 300, thereby enabling rapid cooling of the battery pack 300 and the power conversion circuit board 231.

[0084] Please also refer to Figures 4 to 10Furthermore, the battery casing is also provided with an air inlet for allowing airflow into the battery pack 300. To improve the heat dissipation efficiency of the battery pack 300 and accelerate the removal of heat from its interior, in some embodiments, the first vent is equipped with a first cooling fan 113 for dissipating heat from the interior of the battery pack 300. In the ventilation direction of the second vent, the projection of the first cooling fan 113 at least partially overlaps with the projection of the second vent. By directly blowing air onto the second vent by the first cooling fan 113, heat within the battery compartment 100 can be quickly expelled through the second vent. The rotation of the first cooling fan 113 accelerates the airflow speed (the fan creates a local pressure difference through rotating blades, converting mechanical energy into kinetic energy, forcing air to flow in a specific direction), thus improving the heat dissipation efficiency of the battery pack 300. Specifically, the first cooling fan 113 is located outside the battery compartment 100; however, the first cooling fan 113 can also be located inside the battery compartment 100.

[0085] Please also refer to Figures 7 to 9 In some embodiments, a second cooling fan 201 for dissipating heat from the power conversion circuit board 231 is provided within the accommodating space. The projection of the second cooling fan 201 at least partially overlaps with the projection of the second ventilation opening in the ventilation direction of the second ventilation opening. This arrangement allows the second cooling fan 201 to dissipate the heat generated by the power conversion circuit board 231 rapidly through the second ventilation opening, as a hot airflow along a straight path.

[0086] In some embodiments, a first cooling fan 113 is provided at each of the first ventilation openings at both ends of the battery compartment 100. Both first cooling fans 113 exhaust air to the outside. Two second cooling fans 201 are provided at each of the two ends of the power conversion circuit board 231. The two second cooling fans 201 at one end of the power conversion circuit board 231 blow air onto the power conversion circuit board, and the two second cooling fans 201 at the other end exhaust air to the outside.

[0087] In some embodiments, the rotational speed of the second cooling fan 201 is greater than that of the first cooling fan 113. By increasing the rotational speed of the second cooling fan 201, the speed of the airflow it generates is increased, thereby achieving a better heat dissipation effect on the power conversion circuit board 231, which generates a lot of heat.

[0088] It should be noted that the description of at least partial overlap between the projections of the two components in this application includes both partial overlap and complete overlap.

[0089] Please also refer to Figures 4 to 9In some embodiments, the projection of the power conversion circuit board 231 at least partially overlaps with the projection of the second vent in the ventilation direction of the second vent. Combined with the aforementioned arrangement of the projection of the second cooling fan 201 at least partially overlapping with the projection of the second vent in the ventilation direction of the second vent, this arrangement of the power conversion circuit board 231, the second cooling fan 201, and the second vent along a straight line or approximately a straight line ensures that the heat generated by the power conversion circuit board 231 is dissipated along a straight path, improving the heat dissipation efficiency of the power conversion circuit board 231.

[0090] It should be noted that in this application, the power conversion circuit board includes a circuit board body and a plurality of components disposed on the circuit board body. The projection of the aforementioned conversion circuit board 231 at least partially overlaps with the projection of the second vent, which means that the projection of the plurality of components on the circuit board body at least partially overlaps with the projection of the second vent.

[0091] Please also refer to Figures 4 to 10 It should be noted that the battery compartment 100 of this application is a battery compartment 100 with an opening. The battery compartment 100 is used to install the battery pack 300, and the battery pack 300 is detachably inserted into the battery compartment 100. The outer shell 200 is an outer shell 200 with an opening that can at least partially accommodate the battery compartment 100. The battery compartment 100 is assembled inside the outer shell 200 through the opening. After assembly, the battery compartment 100 and the outer shell 200 form an accommodating space between them. Further, the accommodating space includes a first space, a second space, and a third space. The first space is located on one side of the battery compartment 100 and a first circuit board is disposed in the first space. The second space is located on the opposite side of the battery compartment 100 from the first space and a second circuit board is disposed in the second space. The third space is located between the first space and the second space, and the power conversion circuit board 231 is located in the third space. The first space, the second space, and the third space can all exchange heat with external gas through the second vent. By dividing the storage space into three areas, each housing a circuit board, and utilizing a second ventilation opening to dissipate heat from the circuits within each area, the circuit boards are rationally arranged to ensure they do not interfere with each other while also providing adequate heat dissipation for each individual board. In some embodiments, the first, second, and third spaces are interconnected. Specifically, the first and second spaces are located on either side of the battery pack 300, and the third space is located below the battery pack 300.

[0092] Please also refer to Figures 4 to 10Furthermore, the first circuit board includes a display panel 212 configured to display at least the power information of the battery pack 300, and the second circuit board includes a control circuit board 227 configured to control the power conversion circuit board 231 to perform power conversion. Further, the first circuit board may also include a DC circuit board with a DC output port for supplying power to outdoor DC appliances, and the first circuit board may also include an AC circuit board with an AC output port 210 for supplying power to external AC appliances.

[0093] The functions of the power conversion circuit board 231 include converting external electrical energy into charging energy for the battery pack 300 and / or converting the electrical energy of the battery pack 300 into electrical energy that is output to the outside through the AC output port 210 of the AC circuit board or the DC output port of the DC circuit board. The functions of the control circuit board 227 include controlling the operation of the power conversion circuit board 231, receiving the power supply from the power conversion circuit board 231, and transferring the electrical energy of the power conversion circuit board 231 to the DC output circuit board. The DC output circuit board discharges to the outside through its DC output port, which can supply power to outdoor DC electrical appliances.

[0094] Please also refer to Figures 4 to 10 This application also provides a power conversion device, including a housing 200, a battery compartment 100, and an inverter module. The battery compartment 100 is at least partially housed within the housing 200 and can accommodate a battery pack 300. The battery pack 300 can be detached from the power conversion device to power power tools, thereby expanding the application range of the battery pack 300. The inverter module is disposed within the accommodating space enclosed by the battery compartment 100 and the housing 200. The battery compartment 100 has a first vent for heat dissipation of the battery pack 300, and the housing has a second vent for heat dissipation of the accommodating space. In the ventilation direction of the second vent, the projections of the first vent and the second vent at least partially overlap. This configuration facilitates the battery pack 300 located inside the battery compartment 100 within the housing 200 to expel heat to the outside in a straight path through the first vent and then through the second vent on the housing 200. The second vent also serves to dissipate heat from the inverter module, ensuring that the heat generated by both the battery pack 300 and the inverter module can be discharged to the outside of the power conversion device through the second vent.

[0095] Please also refer to Figures 4 to 10In some embodiments, the battery compartment 100 includes a first side plate 105 and a second side plate 106, both of which are provided with first ventilation openings. By providing first ventilation openings on the corresponding first side plate 105 and second side plate 106 of the battery compartment 100, the efficiency of heat exchange between the inside and outside of the battery compartment 100 is improved.

[0096] Please also refer to Figures 4 to 10 In some embodiments, the outer casing 200 includes a third side plate 222 and a fourth side plate 223, both of which are provided with second ventilation openings. By providing second ventilation openings on the corresponding third side plate 222 and fourth side plate 223 of the outer casing 200, the efficiency of heat exchange between the accommodating space and the external environment of the outer casing 200 is improved.

[0097] Please also refer to Figures 4 to 10 In some embodiments, in the ventilation direction of the second vent, the projection of the first vent on the first side plate 105 at least partially overlaps with the projection of the second vent on its adjacent third side plate 222. In the ventilation direction of the second vent, the projection of the first vent on the second side plate 106 at least partially overlaps with the projection of the second vent on its adjacent fourth side plate 223. By arranging the first vent on the first side plate 105 and the second vent on the third side plate 222 adjacent to each other and at least partially overlapping the projections of the two adjacent vents, and by arranging the first vent on the second side plate 106 and the second vent on the fourth side plate 223 adjacent to each other and at least partially overlapping the projections of the two adjacent vents, the heat generated by the battery pack 300 can be discharged to the outside of the housing 200 along a straight path in the form of hot airflow through the first vent and the second vent. Moreover, by providing two first vents and two second vents, the heat dissipation efficiency of the battery pack 300 and the housing space is improved, achieving the purpose of rapid cooling of the battery pack 300 and the power conversion circuit board 231.

[0098] In some embodiments, a first cooling fan 113 is provided at the first vent on the first side plate 105 and the first vent on the second side plate 106 to accelerate the heat dissipation efficiency inside the battery compartment 100.

[0099] Please also refer to Figures 4 to 10In some embodiments, the first cooling fans 113 on the first side plate 105 and the second side plate 106 are both configured to exhaust air out of the battery compartment 100. Furthermore, the battery pack 300 is provided with an air inlet and an air outlet. The air outlet of the battery pack 300 corresponds to the first ventilation opening and is on the same ventilation path. Due to the obstruction of the battery cells 301 inside the battery pack 300, blowing air into the battery pack 300 would result in poor heat dissipation. Compared to blowing air into the battery compartment 100, exhausting air out through the first cooling fans 113 can effectively extract heat from the battery pack 300 through airflow, resulting in better heat dissipation.

[0100] Of course, in another embodiment, a cooling fan can be provided between the first side plate 105 and the third side plate 222 to exhaust air and dissipate heat from both the first and second vents. Similarly, a cooling fan can also be provided between the second side plate 106 and the fourth side plate 223 to exhaust air and dissipate heat from both the first and second vents at the other end.

[0101] like Figure 5 and Figure 8 In some embodiments, the first vents on the first side plate 105 and the second side plate 106 both exhaust air to the outside, while the second vents on the third side plate 222 and the fourth side plate 223 have opposite orientations: one blows air into the receiving space, and the other exhausts air outward from the receiving space. Furthermore, the first vent also exhausts air to the outside through the second vent. This results in one side of the power conversion device having the same ventilation direction for both the first and second vents, while the other side has conflicting ventilation directions. Consequently, the airflow exhausted from the first vent is drawn into the receiving space before exiting the second vent, affecting the heat dissipation of the power conversion circuit board 231. To address these issues, this application provides a guide 114 at the first vent, which guides the airflow exhausted from the first vent to the second vent for discharge. Although a portion of the airflow discharged through the first vent and then through the second vent is drawn back into the second receiving space, the airflow discharged through the second vent has already undergone at least some heat exchange after contacting the external environment, and the discharged airflow has achieved partial heat dissipation. Therefore, its impact on the heat dissipation of the power conversion circuit board 231 is relatively small after being drawn back into the receiving space. In some embodiments, the guide member 114 includes a guide pipe.

[0102] In some embodiments, the battery pack 300 (specifically, the second-specification battery pack in this application) has first terminals for electrical connection to the outside at both ends. The first side plate 105 and the second side plate 106 each have second terminals 119 that can be electrically connected to the first terminals, and the second terminals 119 are located above the first vent. After the battery pack 300 is assembled with the battery compartment 100, the first terminals and the second terminals 119 are electrically connected. Airflow passing through the first and second terminals 119 can be discharged from the power conversion device through the first and second vents. Therefore, the first and second vents can dissipate heat from the battery pack 300 and the inverter circuit board while also dissipating heat generated during the conduction process of the first and second terminals 119.

[0103] In some embodiments, a cover 101 is provided on the battery compartment 100, and a gap is provided between the cover 101 and the battery compartment 100 for airflow to pass through. At least part of the airflow entering the battery compartment 100 through the gap can flow through the first terminal and the second terminal 119 and be discharged from the power conversion device through the first vent and the second vent.

[0104] like Figure 8 As shown, in some embodiments, part of the airflow entering the battery compartment 100 through the gap passes through the first terminal and the second terminal 119, and another part enters the battery pack 300, passes through the battery cell 301 inside the battery pack 300, and then exits the battery pack 300. Finally, both parts of the airflow are discharged from the power conversion device through the first vent and the second vent.

[0105] Of course, ventilation holes can also be directly provided on the cover 101 so that airflow enters the battery compartment 100 through the ventilation holes on the cover 101, and then enters the battery pack 300 and flows through the first terminal and the second terminal 119.

[0106] Please also refer to Figures 4 to 10The battery compartment 100 of this application has an opening, through which the battery pack 300 is detachably inserted. The battery compartment 100 is at least partially housed within the outer casing 200. After assembly, the battery compartment 100 and the outer casing 200 form a receiving space. This receiving space includes a first space, a second space, and a third space. The first space is located on one side of the battery compartment 100 and houses a first circuit board. The second space is located on the opposite side of the battery compartment 100 from the first space and houses a second circuit board. The third space is located between the first and second spaces, and the inverter module is located within the third space. Furthermore, the first, second, and third spaces are located between the third side plate 222 and the fourth side plate 223. Gas entering the outer casing 200 through the second vent of the third side plate 222 can flow through the first, second, and third spaces and then exit the outer casing 200 through the second vent of the fourth side plate 223.

[0107] It should be noted that the technical features of the power conversion circuit board 231, inverter module, inverter circuit board, etc. involved in this application all describe the same functional component, whose main function is to convert DC power into AC power and / or AC power into DC power, or to convert DC power between different voltages.

[0108] In some embodiments, the first circuit board extends and is arranged in the first space along the ventilation direction of the second vent, the second circuit board extends and is arranged in the second space along the ventilation direction of the second vent, and the inverter module extends and is arranged in the third space along the ventilation direction of the second vent. This arrangement helps the airflow to flow along the extension direction of the first circuit board, the second circuit board and the inverter module, so as to achieve the purpose of fully dissipating heat from the surface of each circuit board.

[0109] In some embodiments, a second cooling fan 201 is provided at both ends of the inverter module. In the ventilation direction of the second vent, each second cooling fan 201 is at least partially overlapped with its adjacent second vent. By providing the second cooling fans 201, the airflow velocity near the inverter module is increased, thereby improving the efficiency of heat exchange between the inverter module and the airflow. Combined with the battery compartment 100 dissipating heat through the first vent and then through the second vent, this ensures that both main heat sources (battery pack 300 and inverter module) in this application are ultimately discharged through the second vent.

[0110] In some embodiments, the second cooling fan 201 at one end of the inverter module is configured to blow air onto the inverter module, and the second cooling fan 201 at the other end of the inverter module is configured to extract the airflow flowing through the inverter module. By blowing and extracting air, external cold air is passed through the inverter module to achieve heat dissipation of the inverter module.

[0111] In some embodiments, in the ventilation direction of the second vent, the projection of the inverter module at least partially overlaps with the projection of the second vent on the third side plate 222 and the projection of the second vent on the fourth side plate 223. This allows airflow entering from the outside and passing through the inverter module to exit directly in the same direction, eliminating the need for a winding ventilation path, reducing kinetic energy loss during airflow, and improving heat dissipation rate.

[0112] Please also refer to Figures 3 to 8 In some embodiments, both the third side plate 222 and the fourth side plate 223 are provided with a third cooling fan (not shown in the figure) corresponding to the second vent. The third cooling fan can exhaust the hot air from the battery compartment 100 and the housing space of the power conversion device. In this embodiment, the use of a third cooling fan achieves the purpose of heat dissipation for both the battery compartment 100 and the housing space. In some embodiments, in the vertical direction, the third cooling fans at both ends of the power conversion device span across the first vent and the inverter module. In some embodiments, the third cooling fan on the third side plate 222 blows air towards the first vent and the inverter module, while the third cooling fan on the fourth side plate 223 draws air from the first vent and the inverter module and exhausts air to the outside.

[0113] Please also refer to Figures 4 to 8 In some embodiments, in the ventilation direction of the second vent, the projection of any one of the projections of the first vent on the first side plate 105, the first vent on the second side plate 106, the second vent on the third side plate 222, and the second vent on the fourth side plate 223 at least partially overlaps with the projections of each of the other three. This allows ventilation to be achieved by setting the ventilation paths of the vents at both ends of the power conversion device along the same path or approximately the same path.

[0114] In some embodiments, the heights of the first and second vents at one end of the power conversion device are different from those at the other end of the power conversion device.

[0115] like Figure 8 and Figure 10 As shown, in some embodiments, a first terminal at one end of the battery pack 300 can supply power to a second terminal 119 on a first side plate 105, and a first terminal at the other end of the battery pack 300 can supply power to a second terminal 119 on a second side plate 106. The inverter module can receive power from the second terminal 119 on the first side plate 105 and the second terminal 119 on the second side plate 106 and convert the electrical energy into external discharge. In some embodiments, the first terminals at both ends of the battery pack 300 can simultaneously discharge externally or simultaneously receive electrical energy to charge themselves.

[0116] like Figure 3 and Figure 10As shown, in some embodiments, a first terminal at one end of the battery pack 300 is electrically connected to a second terminal 119 on a first side plate 105, and a first terminal at the other end of the battery pack 300 is electrically connected to a second terminal 119 on a second side plate 106. The inverter module is able to receive mains power and convert it into electrical energy to charge the battery pack 300.

[0117] like Figure 3 and Figure 10 As shown, further, the second terminal 119 in this application is disposed on the terminal base 118. The terminal base 118 is pivotally connected to the mounting base 120 on the battery compartment 100 by a rotating shaft 121. Specifically, the mounting base 120 is provided with a first connecting hole 1201, and the terminal base 118 is provided with a second connecting hole 1181. The rotating shaft 1201 is rotatably connected within the first connecting hole 1201 and the second connecting hole 1181 to realize the rotational mounting of the terminal base 118 on the mounting base 120. Therefore, the second terminal 119 can rotate with the terminal base 118 relative to the mounting base 120 of the battery compartment 100. A torsion spring 122 is provided on the rotating shaft 121, and the force of the torsion spring 122 acts on the terminal base 118 and the mounting base 120 of the battery compartment 100. In the initial state, under the force of the torsion spring 122, the second terminal 119 on the terminal block 118 is located in the area between the battery compartment 100 and the outer casing 200, thus protecting the second terminal 119 when the battery pack 300 is not inserted. The battery compartment 110 is also provided with a side opening 107, through which part of the terminal block 118 extends into the battery compartment 100. When the battery pack 300 is inserted into the battery compartment 100, the battery pack 300 first contacts the part of the terminal block 118 located inside the battery compartment. As the battery pack 300 continues to move into the battery compartment 100, it continuously pushes the terminal block 118. The terminal block 118 rotates under the rotational support of the rotating shaft 121, causing the second terminal 119 on the terminal block 118 to gradually contact and electrically connect with the first terminal on the battery pack 300. During the process of inserting the battery pack 300 into the battery compartment 100, the terminal block 118 flips against the elastic force of the torsion spring 122. When the battery pack 300 is removed from the battery compartment 100, the terminal block 118 automatically resets under the action of the elastic force of the torsion spring 122 and returns to the position between the battery compartment 100 and the outer casing 200.

[0118] like Figure 3 and Figure 10As shown, in some embodiments, a locking mechanism 111 is provided on the battery compartment 100. When the battery pack 300 is inserted into the battery compartment 100, the locking mechanism 111 locks the battery pack 300 to prevent the battery pack 300 from detaching from the battery compartment 100 due to non-human factors. Specifically, the locking mechanism 111 includes an unlocking key 123 rotatably disposed on the mounting base 120 and a locking block 125 for locking or unlocking the battery pack 300. A sliding groove is provided on the mounting base 120, and the locking block 125 is partially located in the sliding groove and can move within the groove. The locking block 125 is linked with the unlocking key 123 and can move within the sliding groove under the drive of the unlocking key 123 to unlock or unlock the battery pack 300.

[0119] like Figure 10 As shown, the unlock key 123 is further provided with an extension 1231, and the locking block 125 is provided with a recessed groove 1251. The extension 1231 is partially located in the recessed groove 1251 so that when the unlock key 123 rotates under the action of external force, it can apply a driving force to the locking block 125 and drive the locking block 125 to move.

[0120] In some embodiments, a compression spring 124 is also provided between the locking block 125 and the mounting base 120. Under the elastic force of the compression spring 124, the locking block 125 remains in an extended state to maintain the lock on the battery pack 300. The battery pack 300 can only be unlocked by driving the unlocking block to rotate under the operation of an external force and resisting the elastic force of the compression spring 124 to move the locking block 125 away from the battery pack 300.

[0121] In some embodiments, a pop-out mechanism 102 is provided at the bottom of the battery compartment 100. When the locking structure releases the battery pack 300, the pop-out mechanism 102 pops the battery pack 300 upwards to a height greater than its original height so that the operator can take out the battery pack 300.

[0122] Please also refer to Figures 2 to 10This application also provides an outdoor work vehicle system, including a battery pack 300, a power conversion device, and an outdoor work vehicle. The power conversion device includes a housing 200, a battery compartment 100, and an inverter module. The housing 200 is provided with an external power interface 217, which can be electrically connected to an external power source to receive external electrical energy. The battery compartment 100 is at least partially housed within the housing 200 and can accommodate the battery pack 300. The inverter module is disposed within the housing space enclosed by the battery compartment 100 and the housing 200, and can receive electrical energy from the external power source and convert it to supply power to the battery pack 300. The battery compartment 100 is provided with a first vent for heat dissipation of the battery pack 300, and the housing is provided with a second vent for heat dissipation of the housing space. In the ventilation direction of the second vent, the projection of the first vent and the projection of the second vent at least partially overlap. This configuration facilitates the heat dissipation of the battery pack 300 located inside the battery compartment 100 within the outer casing 200 through the first vent and then through the second vent on the outer casing 200. The second vent also serves to dissipate heat from the power conversion circuit board 231, ensuring that the heat generated by both the battery pack 300 and the power conversion circuit board 231 can be discharged to the outside of the bidirectional power storage device. Outdoor work vehicles can connect to the power conversion device. When the power conversion device converts electrical energy from an external power source and charges the energy devices on the outdoor work vehicle, it stops charging the battery pack 300. In some embodiments, the power conversion device can charge not only the battery pack 300 housed in its battery compartment 100 but also the outdoor work vehicle. However, when charging the outdoor work vehicle, it cannot charge the battery pack 300 housed within the power conversion device.

[0123] In some embodiments, the power conversion device can simultaneously charge the battery pack 300 housed in its battery compartment 100 and also charge outdoor work vehicles. In some embodiments, the power conversion device can simultaneously charge the battery pack 300 housed in its battery compartment 100 and also charge outdoor work vehicles, and can also provide power to outdoor electrical appliances.

[0124] In some embodiments, the outdoor work vehicle system employs the power conversion device described in the above embodiments, wherein the battery compartment 100 includes a first side plate 105 and a second side plate 106 respectively, and both the first side plate 105 and the second side plate 106 are provided with first ventilation openings. By providing first ventilation openings on the corresponding first side plate 105 and the second side plate 106 of the battery compartment 100, the efficiency of heat exchange between the inside and outside of the battery compartment 100 is improved.

[0125] In some embodiments, the outer casing 200 includes a third side plate 222 and a fourth side plate 223 respectively, and both the third side plate 222 and the fourth side plate 223 are provided with second ventilation openings. By providing second ventilation openings on the corresponding third side plate 222 and the fourth side plate 223 of the outer casing 200, the efficiency of heat exchange between the accommodating space and the external environment of the outer casing 200 is improved.

[0126] Please also refer to Figures 3 to 10 In some embodiments, in the ventilation direction of the second vent, the projection of the first vent on the first side plate 105 at least partially overlaps with the projection of the second vent on its adjacent third side plate 222. In the ventilation direction of the second vent, the projection of the first vent on the second side plate 106 at least partially overlaps with the projection of the second vent on its adjacent fourth side plate 223. By arranging the first vent on the first side plate 105 and the second vent on the third side plate 222 adjacent to each other and at least partially overlapping the projections of the two adjacent vents, and by arranging the first vent on the second side plate 106 and the second vent on the fourth side plate 223 adjacent to each other and at least partially overlapping the projections of the two adjacent vents, the heat generated by the battery pack 300 can be discharged to the outside of the outer casing 200 in a straight path as hot airflow. Moreover, by setting two first vents and two second air outlets 221, the heat dissipation efficiency of the battery pack 300 and the housing space is improved. Furthermore, by dissipating heat separately for the inner casing and the housing space between the inner casing and the outer casing, heat accumulation is effectively avoided, and the battery pack 300 and the power conversion circuit board 231 are cooled rapidly.

[0127] In some embodiments, a first cooling fan 113 is provided at the first vent on the first side plate 105 and the first vent on the second side plate 106 to improve the heat dissipation efficiency inside the battery compartment 100.

[0128] In some embodiments, the first cooling fans 113 on the first side plate 105 and the second side plate 106 are both configured to exhaust air to the outside of the battery compartment 100. Further, the battery pack 300 is provided with an air inlet and an air outlet. The air outlet of the battery pack 300 corresponds to the first ventilation opening and is on the same ventilation path. Due to the obstruction of the battery cells 301 inside the battery pack 300, blowing air into the battery pack 300 would result in poor heat dissipation. Compared to blowing air into the battery compartment 100, exhausting air to the outside via the first cooling fans 113 can effectively remove heat from the battery pack 300 through airflow.

[0129] In some embodiments, the battery pack 300 is provided with a first terminal that is electrically connected to the outside at both ends. The first side plate 105 and the second side plate 106 are each provided with a second terminal 119 that can be electrically connected to the first terminal and the second terminal 119 is located above the first vent. The airflow flowing through the first terminal and the second terminal 119 can be discharged from the power conversion device through the first vent and the second vent. The first vent and the second vent serve to dissipate heat from the first terminal and the second terminal 119.

[0130] In some embodiments, a cover 101 is provided on the battery compartment 100, and a gap is provided between the cover 101 and the battery compartment 100 for airflow to pass through. At least part of the airflow entering the battery compartment 100 through the gap can flow through the first terminal and the second terminal 119 and be discharged from the power conversion device through the first vent and the second vent.

[0131] In some embodiments, part of the airflow entering the battery compartment 100 through the gap passes through the first terminal and the second terminal 119, and another part enters the battery pack 300, passes through the battery cell 301 inside the battery pack 300, and then exits the battery pack 300. Finally, both parts of the airflow are discharged from the power conversion device through the first vent and the second vent.

[0132] Please also refer to Figures 3 to 10 This application also provides an outdoor work vehicle system, including a battery pack 300, a power conversion device, and an outdoor work vehicle. The power conversion device includes a housing 200, a battery compartment 100, and an inverter module. The housing 200 is provided with an external power interface 217 for electrical connection to an external power source to receive external electrical energy. The battery compartment 100 is at least partially housed within the housing 200 and is capable of accommodating the battery pack 300. The inverter module is disposed within the accommodating space enclosed by the battery compartment 100 and the housing 200, and is electrically connected to the external power interface 217. The battery compartment 100 is provided with a first vent for heat dissipation of the battery pack 300, and the housing is provided with a second vent for heat dissipation of the accommodating space. In the ventilation direction of the second vent, the projections of the first vent and the second vent at least partially overlap.

[0133] The outdoor work vehicle can be connected to a power conversion device, which converts external power into electrical energy to charge the energy devices on the outdoor work vehicle. The outdoor work vehicle system in this application uses the power conversion device described in the above embodiment. The energy device on the outdoor work vehicle is a battery pack 300.

[0134] In some embodiments, the battery pack 300 can be detached from the power conversion device and used to power outdoor work vehicles, expanding the application scenarios of the battery pack 300.

[0135] This application also provides a bidirectional energy storage power supply, including an inner housing, an outer housing 200, and an inverter circuit board. The inner housing is configured to be detachably mounted on a battery pack 300. The inner housing includes a first air inlet 103 and a first air outlet 104. A first airflow channel is formed between the battery pack 300 and the inner housing. The path of the first airflow channel includes: airflow entering the inner housing through the first air inlet 103, entering the battery pack 300, and then exiting the battery compartment 100 through the first air outlet 104. The outer housing 200 is disposed outside the inner housing. The outer housing 200 includes a second air inlet 220 and a second air outlet 221. A second airflow channel is formed between the inner housing and the outer housing 200. The inverter circuit board is configured to convert the electrical energy of the battery pack 300 into external discharge and / or convert external electrical energy into charging of the battery pack 300. The inverter circuit board is located between the inner housing and the outer housing 200 and is at least partially located within the second airflow channel. Airflow entering the second airflow channel through the second air inlet 220 passes through the inverter circuit board and exits the outer housing 200 through the second air outlet 221. Airflow exiting through the first air outlet 104 can exit the outer housing 200 through the second air outlet 221. In this application, the battery pack 300 within the inner housing is cooled by the first airflow channel, while the inverter circuit board between the inner housing and the outer housing 200 uses the second airflow channel. Ultimately, the first and second airflow channels share the second air outlet 221 for external exhaust, effectively preventing heat accumulation and achieving rapid heat dissipation for both the battery pack 300 and the inverter circuit board.

[0136] It should be noted that the first air outlet 104 in this application is equivalent to the first ventilation outlet in the above embodiment, and the second air outlet 221 is equivalent to the second ventilation outlet in the above embodiment.

[0137] In some embodiments, the battery pack 300 includes a battery pack air inlet and a battery pack air outlet. Airflow in the first airflow channel enters the battery pack through the battery pack air inlet, passes through the battery cells 301 inside the battery pack 300, and then exits the battery pack 300 through the battery pack air outlet and exits the inner casing through the first air outlet 104. This allows for cooling and heat dissipation of the battery cells 301 inside the battery pack 300.

[0138] It should be noted that the aforementioned third ventilation opening includes a battery pack air inlet and a battery pack air outlet. That is, there are multiple third ventilation openings, one of which is a battery pack air inlet and the other is a battery pack air outlet.

[0139] In some embodiments, the inner housing includes a first side plate 105 and a second side plate 106 correspondingly arranged. Both the first side plate 105 and the second side plate 106 are provided with a first air outlet 104. A cooling fan for exhausting air from the outside of the inner housing is provided on the first air outlet 104. The battery pack 300 is located between the two first air outlets 104. With first air outlets 104 at both ends of the battery pack 300, the airflow entering and exiting the battery pack 300 is then discharged to the outside through the two first air outlets 104. Compared to a single air outlet, two first air outlets 104 can improve the heat dissipation efficiency inside the battery pack 300.

[0140] In some embodiments, the first air outlet 104 on the first side plate 105 and the first air outlet 104 on the second side plate 106 are symmetrically arranged.

[0141] like Figure 8 and Figure 10 As shown, in some embodiments, the battery pack 300 is provided with a first terminal, and the inner shell is provided with a second terminal 119. When the battery pack 300 is assembled into the inner shell, the first terminal and the second terminal 119 are electrically connected. The airflow entering the inner shell through the first air inlet 103 passes through the first terminal and the second terminal 119 and is discharged through the first air outlet 104. This dissipates the heat generated when the first terminal on the battery pack 300 and the second terminal 119 on the inner shell are in electrical contact, so that the airflow entering the inner shell can not only dissipate heat from the battery pack 300, but also dissipate heat from the electrically connected first terminal and the second terminal 119.

[0142] In some embodiments, along the assembly direction of the battery pack 300, the first terminal and the second terminal 119 are located between the first air inlet 103 and the first air outlet 104. The airflow entering through the first air inlet 103 can be discharged through the first air outlet 104 after passing through the first terminal and the second terminal 119. This arrangement can dissipate the heat generated by the first terminal and the second terminal 119 when they are in electrical contact, which is beneficial to the overall heat dissipation of the internal structure of the bidirectional energy storage power supply.

[0143] like Figure 3 and Figure 8 As shown, in some embodiments, the inner housing is a receiving cavity with an opening, and the battery pack 300 is detachably disposed within the receiving cavity. The first air inlet 103 is at least part of the opening of the inner housing. This arrangement allows the opening of the inner housing for the installation and removal of the battery pack 300 to also allow airflow into the inner housing for heat dissipation of the battery pack 300 and the multiple terminals used for electrical connections within the inner housing.

[0144] In some embodiments, the battery pack 300 is further provided with a control board assembly for controlling the charging and discharging of the battery pack 300, and the airflow entering the battery pack 300 can also dissipate heat from the control board assembly.

[0145] In some embodiments, a control circuit board 227 capable of controlling the operation of the inverter circuit board and an output circuit board 226 capable of receiving power from at least one of the control circuit board 227 and the inverter circuit board are further provided between the inner housing and the outer housing 200. The airflow entering the second airflow channel from the second air inlet 220 flows through the control circuit board 227 and the output circuit board 226 and is discharged from the outer housing 200 through the second air outlet 221.

[0146] The second airflow channel formed between the second air inlet 220 and the second air outlet 221 can dissipate heat from the control circuit board 227, output circuit board 226 and inverter circuit board disposed between the inner shell and the outer shell 200.

[0147] like Figure 3 , Figure 7 and Figure 8 As shown, in some embodiments, a receiving space is formed between the inner housing and the outer housing 200. The second airflow channel is at least partially located in the receiving space, which includes a first space, a second space, and a third space. Specifically, the first space is located on one side of the inner housing, and the control circuit board 227 is located within the first space. The second space is located on the opposite side of the inner housing corresponding to the first space, and the output circuit board 226 is located within the second space. The third space is located between the first and second spaces, and the inverter circuit board is located within the third space. The third space is located between the first and second spaces and below the inner housing. The airflow entering the second airflow channel from the second air inlet 220 passes through the control circuit board 227, the output circuit board 226, and the inverter circuit board within the receiving space and is then discharged from the second air outlet 221. In this application, the area between the inner housing and the outer housing 200 is divided into three spatial areas, located on the front side, the rear side, and below the bottom of the inner housing, respectively. The airflow through the second airflow channel dissipates heat from the control circuit board 227, the output circuit board 226, and the inverter circuit board within these three spatial areas.

[0148] See also Figure 5 and Figure 7 In some embodiments, the housing 200 includes a correspondingly disposed third side plate 222 and a fourth side plate 223. A second air inlet 220 is disposed on the third side plate 222, and a second air outlet 221 is disposed on the fourth side plate 223. The control circuit board 227, the output circuit board 226, and the inverter circuit board are located between the second air inlet 220 and the second air outlet 221. Airflow enters the receiving space through the second air inlet 220, flows through the control circuit board 227, the output circuit board 226, and the inverter circuit board, and then exits to dissipate heat from the control circuit board 227, the output circuit board 226, and the inverter circuit board.

[0149] See also Figure 5 and Figure 7 In some embodiments, the second air inlet 220 on the third side plate 222 and the second air outlet 221 on the fourth side plate 223 are symmetrically arranged.

[0150] In some embodiments, at least one of the second air inlet 220 and the second air outlet 221 is equipped with a cooling fan. Specifically, the second air inlet 220 or the second air outlet 221 is equipped with a cooling fan, or both the second air inlet 220 and the second air outlet 221 are equipped with cooling fans.

[0151] In some embodiments, the battery pack 300 is located above the inverter circuit board, and the inner housing has an upward-opening receiving cavity, so that the battery pack 300 is not interfered with by the inverter circuit board when it is being placed or removed.

[0152] See also Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments, the inner shell (battery compartment 100) includes a first side plate 105 and a second side plate 106 respectively, both of which are provided with a first air outlet 104. The outer shell 200 includes a third side plate 222 and a fourth side plate 223 respectively, a second air inlet 220 is provided on the third side plate 222, and a second air outlet 221 is provided on the fourth side plate 223. The two first air outlets 104 are located in the same straight line direction as the second air inlet 220 and the second air outlet 221 in their ventilation direction. The two first air outlets 104 on the inner shell and the two second air outlets 221 on the outer shell 200 are located in the same straight line direction. Compared with the curved airflow channel, the straight discharge arrangement adopted in this embodiment is more conducive to the discharge of airflow.

[0153] In some embodiments, the first air outlet 104 is disposed adjacent to the second airflow channel, and a guide member 114 is provided at the first air outlet 104 to guide the airflow discharged from the first air outlet 104 to the second air outlet 221. The airflow discharged through the first air outlet 104 is discharged through the second air outlet 221 under the guidance of the guide member 114.

[0154] See also Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 10In some embodiments, the first air outlets 104 on the first side plate 105 and the second side plate 106 both exhaust air to the outside, the second air inlet 220 on the third side plate 222 is used for air intake, and the second vent on the fourth side plate 223 is used for air exhaust. Furthermore, the first air outlet 104 also exhausts air to the outside through the second air inlet 220, and the first side plate 105 and the third side plate 222 are adjacent to and correspondingly arranged, as are the second side plate 106 and the fourth side plate 223. This results in the first air outlet 104 and the second air outlet 221 on one side having the same ventilation direction, while the first air outlet 104 and the second air inlet 220 on the other side of the inner shell have conflicting ventilation directions. This can easily lead to the air discharged from the first air outlet 104 being sucked into the second airflow channel before exiting the second air inlet 220, which will affect the heat dissipation of the power conversion circuit board 231. Based on the above problems, a guide 114 is provided at the first air outlet 104 in this application. The guide 114 can guide the airflow discharged from the first air outlet 104 to the second air inlet 220 for discharge (i.e., using a part of the second air inlet 220 for the exhaust of the first air outlet 104). Although some of the airflow that is discharged through the first air outlet 104 and then through the second air inlet 220 will be drawn back into the second airflow channel, the airflow that is discharged through the second air inlet 220 has already achieved at least a part of the heat exchange after contacting the external environment, and its impact on the heat dissipation of the inverter circuit board is small after being drawn back into the second airflow channel.

[0155] like Figure 10 As shown, in some embodiments, the flow guide 114 is a tubular structure.

[0156] In some embodiments, the air guide 114 is provided with a wire harness limiting part 116, and the inner housing is provided with an external terminal for electrical connection with the battery pack 300. A wire harness is connected between the external terminal and the control circuit board 227, and the wire harness is limited by the wire harness limiting part 116, with the wire harness located outside the air guide 114. This is to prevent the wire harness from blocking the first air outlet 104, thereby preventing it from affecting the airflow speed. It should be noted that the external terminal in this embodiment is functionally equivalent to the second terminal 119 in other embodiments.

[0157] like Figure 9 and Figure 10As shown, in some embodiments, the airflow guide 114 is configured to house a fan shroud for the first cooling fan 113. The fan shroud surrounds the first cooling fan 113 circumferentially. The airflow generated when the first cooling fan 113 rotates can pass through the fan shroud and then through another part of the airflow guide 114 to exit the battery compartment 100. With this configuration, the airflow generated by the first cooling fan 113 can be reduced in loss when it is transmitted to the airflow guide 114. That is, by using the constraint and guidance of the airflow guide 115, almost all of the airflow generated by the rotation of the first cooling fan 113 can be used to exhaust air into the battery compartment 100, thereby improving the heat dissipation efficiency of the battery compartment 100 and the battery pack 300 placed in the battery compartment 100.

[0158] like Figure 10 As shown, in some embodiments, the wiring harness limiting portion 116 is disposed on the fan cover and located on the same end face of the fan cover.

[0159] like Figure 10 As shown, in some embodiments, the fan cover is also provided with a terminal block clearance portion 117 for avoiding the rotation of the terminal block 118. Specifically, the terminal block 118 is disposed above the fan cover, and the terminal block 118 and the fan cover are arranged adjacent to each other, one above the other. When the battery pack 300 is inserted into or removed from the battery compartment 100, the terminal block 118 will be driven to rotate. In order to save installation space, the terminal block 118 and the fan cover are installed relatively close in this application, and the terminal block clearance portion 117 is to prevent the fan cover from interfering with the rotation of the terminal block 118 driven by the battery pack 300.

[0160] In some embodiments, the inner housing forms a receiving cavity, which is configured to accommodate two first-specification battery packs or one second-specification battery pack. The bidirectional energy storage power supply in this application can be used for charging or discharging the two types of battery packs.

[0161] In some embodiments, inverter components are provided on the inverter circuit board and are located in the second airflow channel. Since the inverter components are the main source of heat in the entire bidirectional energy storage power supply, the second airflow channel is used to dissipate heat from the inverter components, which can effectively alleviate the heat problem of the entire inverter circuit board and ensure the normal and efficient conversion of current by the inverter circuit board.

[0162] See also Figures 3 to 9This application also provides a bidirectional energy storage power supply, including an inner housing, an outer housing 200, and an inverter module. The inner housing is configured to detachably house a battery pack 300. The inner housing includes a first air inlet 103 and a first air outlet 104 for cooling airflow, wherein airflow entering the inner housing through the first air inlet 103 enters the battery pack 300 and exits the battery compartment 100 through the first air outlet 104. The outer housing 200 includes a second air inlet 220 and a second air outlet 221, and an airflow channel for cooling airflow is formed between the inner housing and the outer housing 200. The inverter module is at least partially located within the airflow channel between the inner housing and the outer housing 200. The inverter module is configured to convert the electrical energy of the battery pack 300 into external discharge and / or convert external electrical energy into charging of the battery pack 300, wherein airflow entering the airflow channel through the second air inlet 220 flows through the inverter module and exits the outer housing 200 through the second air outlet 221. The airflow discharged from the first air outlet 104 can exit the outer casing 200 through the second air outlet 221. This application involves heat dissipation in two main independent spaces. One is the heat dissipation of the battery pack 300 inside the inner casing. The battery pack 300 enters the inner casing through the first air inlet 103, passes through the battery pack 300, exits the inner casing through the first air outlet 104, and finally exits outside the bidirectional energy storage power supply through the second air outlet 221. The other is the heat dissipation of the inverter circuit board between the inner casing and the outer casing 200. Specifically, the airflow entering between the inner casing and the outer casing 200 through the second air inlet 220 passes through the inverter module and exits through the second air outlet 221. By using two airflow paths to dissipate heat from the bidirectional energy storage power supply, heat accumulation is reduced and the heat dissipation effect is improved.

[0163] like Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments, the first air outlet 104 and the second air outlet 221 are arranged adjacent to each other, and a cooling fan is arranged adjacent to the first air outlet 104 and the second air outlet 221. The cooling fan is configured to blow the airflow in the inner shell and the airflow between the inner shell and the outer shell 200 out of the outer shell 200 through the second air outlet 221. The first air outlet 104 and the second air outlet 221 share the cooling fan for exhaust, which saves production costs and also saves the space occupied by the cooling fan.

[0164] In some embodiments, in the ventilation direction of the first air outlet 104 or the second air outlet 221, the cooling fan is located between the first air outlet 104 and the second air outlet 221.

[0165] See also Figures 3 to 9This application also provides a power conversion device, including an inner housing, an outer housing 200, and an inverter circuit board. The inner housing is configured to be detachably mounted on a battery pack 300. The inner housing includes a first air inlet 103 and a first air outlet 104. A first airflow channel is formed between the battery pack 300 and the inner housing. The path of the first airflow channel includes: airflow entering the inner housing through the first air inlet 103, entering the battery pack 300, and then exiting the battery compartment 100 through the first air outlet 104. The outer housing 200 is disposed outside the inner housing. The outer housing 200 includes a second air inlet 220 and a second air outlet 221. A second airflow channel is formed between the inner housing and the outer housing 200. The inverter circuit board is configured to convert the electrical energy of the battery pack 300 into external discharge and / or convert external electrical energy into external charging of the battery pack 300. The inverter circuit board is located between the inner housing and the outer housing 200 and is at least partially located within the second airflow channel. Airflow entering the second airflow channel through the second air inlet 220 passes through the inverter circuit board and exits the outer housing 200 through the second air outlet 221. The first air outlet 104 is located adjacent to the second air outlet 221, and airflow exiting from the first air outlet 104 can exit the outer housing 200 through the second air outlet 221. In this application, the battery pack 300 within the inner housing is cooled via a first airflow path, while the inverter circuit board between the inner housing and the outer housing 200 utilizes a second airflow channel. Ultimately, the first and second airflow channels share the second air outlet 221 for external exhaust, achieving common cooling for both the battery pack 300 and the inverter circuit board.

[0166] See also Figures 2 to 9 This application also provides a power conversion device, including a housing 200, a battery compartment 100, a first functional area, a second functional area, and a third functional area. The battery compartment 100 is at least partially housed within the housing 200 and can accommodate a battery pack 300. The first functional area is located on one side of the battery pack 300 and is equipped with at least a display panel 212 capable of displaying status information of the power conversion device. The second functional area is located on the opposite side of the battery pack 300 relative to the first functional area and is equipped with at least an external power port 217 capable of being electrically connected to an external power source. The power conversion area is located between the first and second functional areas and below the battery pack 300. The power conversion area is equipped with a power conversion circuit board 231, which can receive electrical energy transmitted from the external power port 217 and convert it into power to charge the battery pack 300 and / or convert and output the electrical energy of the battery pack 300. By setting different functional areas in the outer casing 200, and setting circuit boards with specific functional attributes in each functional area, the various areas inside the power conversion device are reasonably divided so that the circuit boards can be reasonably laid out. Moreover, the circuit boards in each functional area do not interfere with each other when they are disassembled or assembled.

[0167] See also Figure 1 , Figure 2 , Figure 6 and Figure 7 Furthermore, the first functional area is provided with a DC output circuit board and an AC output circuit board. The DC output circuit board is provided with a DC output port, and the display panel 212 is electrically connected to the DC output circuit board. The AC output circuit board is provided with an AC output port 210.

[0168] See also Figure 1 , Figure 2 and Figure 6 The DC output ports include a USB output interface 205 and a cigarette lighter output interface 208. The DC output circuit board is equipped with a USB control switch 206 to control the on / off state of the USB output interface 205 and a cigarette lighter control switch 207 to control the on / off state of the cigarette lighter output port.

[0169] See also Figure 1 , Figure 2 and Figure 6 In some embodiments, the DC circuit board is also provided with a circular hole power connection port 209.

[0170] See also Figure 1 , Figure 2 and Figure 6 The AC output port 210 has multiple ports, specifically 2, 4 or 6. The AC output port 210 can output 120V and 240V voltages. The AC output circuit board is equipped with an AC output control switch 211 to control the power on and off of the AC port.

[0171] See also Figure 1 , Figure 2 and Figure 6 The first functional area also features a display screen connected to the DC output circuit board. The screen displays information such as the battery pack's 300mAh capacity, charging and discharging voltage and current, and output power during external discharge.

[0172] See also Figure 1 , Figure 2 , Figure 6 and Figure 7 The first functional area is also equipped with a lighting lamp 214 and a lighting switch 215 for controlling the lighting lamp 214 to turn on and off. The lighting lamp 214 is connected to the DC output circuit board. The lighting lamp 214 facilitates the operator to illuminate the first functional area in low light conditions so as to perform plug-in and plug-out operations.

[0173] See also Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 29The first functional area is also equipped with a main switch 213 to control the power supply of the entire first functional area. The main switch 213 controls the power supply of the first functional area to prevent the power supply of the entire line from being controlled when other branch switches fail.

[0174] See also Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 29 The second functional area is equipped with a control circuit board 227, which controls the operation of the power conversion circuit board 231 and acquires the electrical energy converted by the power conversion circuit board 231. A DC output circuit board is electrically connected to the control circuit board 227 and can transfer the electrical energy from the control circuit board 227 to the DC output port. An AC output circuit board is electrically connected to the power conversion circuit board 231 and can transfer the electrical energy from the power conversion circuit board 231 to the AC output port 210.

[0175] like Figure 7 and Figure 8 As shown, in some embodiments, an accommodating space is formed between the outer shell 200 and the inner shell (battery compartment 100). The first functional area, the second functional area, and the power conversion area are located within the accommodating space. The outer shell 200 is also provided with a heat dissipation vent that can dissipate heat from the accommodating space. The heat dissipation vent is used to dissipate heat from the first functional area, the second functional area, and the power conversion area within the accommodating space.

[0176] like Figure 2 and Figure 7 As shown, the second functional area is also provided with an external output port 216 that can charge outdoor work vehicles. The external output port 216 is electrically connected to the power conversion circuit board 231, and the outdoor work vehicles can be charged through this power conversion device.

[0177] like Figure 2 and Figure 7 As shown in the figure, in this application, the housing is also provided with a pull rod 203 for moving the power conversion device. The pull rod 203 is located near the second functional area. Specifically, the pull rod 203 is located on the outer shell 200 near the second functional area, such as... Figure 22 and Figure 23 As shown, the pull rod 203 can be a pull-out pull rod 203.

[0178] like Figure 7 As shown, in some embodiments, the battery compartment 100 includes a fifth side plate 109 and a sixth side plate 110 disposed opposite to each other, and the outer casing 200 includes a seventh side plate 224 and an eighth side plate 225 disposed correspondingly. A first functional area is located between the fifth side plate 109 and the seventh side plate 224, and a second functional area is located between the sixth side plate 110 and the eighth side plate 225.

[0179] like Figure 7 As shown, it should be noted that the first side plate 105, the second side plate 106, the fifth side plate 109, and the sixth side plate 110 together form the complete side wall structure of the battery compartment 100, and the third side plate 222, the fourth side plate 223, the seventh side plate 224, and the eighth side plate 225 together form the complete side wall structure of the outer shell 200.

[0180] In some embodiments, the power conversion area is located between the bottom plate of the battery compartment 100 and the bottom plate of the outer casing 200.

[0181] This application also provides a power conversion device, including a housing, an output circuit board assembly 226, a control circuit board 227, and an inverter circuit board. The output circuit board assembly 226 is disposed on one side of the housing, and the output circuit board assembly 226 is connected to an output port that can be connected to an external electrical device. The control circuit board 227 is disposed on the other side of the housing opposite to the output circuit board assembly 226. The inverter circuit board is disposed between the output circuit board assembly 226 and the control circuit board 227, and the inverter circuit board can convert external electrical energy and supply power to the control circuit board 227.

[0182] In some embodiments, the output circuit board assembly 226 includes a DC output circuit board and an AC output circuit board, wherein the DC output circuit board is electrically connected to the control circuit board 227 and the AC output circuit board is electrically connected to the inverter circuit board.

[0183] The housing is also provided with a pull rod 203 for moving the power conversion device, and the pull rod 203 is located near the control circuit board 227.

[0184] In some embodiments, an external output port 216 capable of charging outdoor work vehicles is also provided on the same side of the control circuit board 227, and the external output port 216 is electrically connected to the inverter circuit board.

[0185] like Figure 16 , Figure 17 and Figure 22As shown, this application also provides a power conversion device, including a housing 200, a pull rod 203, and a cover 101. The housing 200 includes a battery compartment 100 with an opening, configured to accommodate a battery pack 300. An inverter assembly is disposed within the housing 200, capable of being electrically connected to the battery pack 300 and converting the electrical energy of the battery pack 300 for external discharge and / or converting mains power for charging the battery pack 300. The pull rod 203 is connected to the housing 200 and can extend or retract along the height direction of the power conversion device. The cover 101 is hinged to the housing 200 and can pivot relative to the housing 200 to close or open the opening of the battery compartment 100. When the pull rod 203 is retracted, the maximum opening angle of the cover 101 is greater than 90° and less than or equal to 150°. By setting the opening angle of the compartment cover 101 to be greater than 90° and less than or equal to 150°, interference caused by the compartment cover 101 to the battery pack 300 during loading and unloading can be avoided, making it easier for operators to load and unload the battery pack 300 in the battery compartment 100.

[0186] In some embodiments, the lever 203 can be a telescopic lever, and the telescopic lever 203 is in a retracted state when the cover 101 is opened.

[0187] like Figure 2 , Figure 16 As shown, in some embodiments, the height of the hinge position between the cover 101 and the outer shell 200 is lower than the top of the pull rod 203. In some embodiments, the hinge assembly 112 is connected to the opening of the battery compartment 100, and the height of the pull rod 203 is higher than the height of the opening of the battery compartment 100. The pull rod 203 is a telescopic pull rod 203. In order to cooperate with the operator's pulling, the top of the telescopic pull rod 203 is also higher in the retracted state. Generally, the top of the telescopic pull rod 203 is higher than the hinge position between the cover 101 and the outer shell 200.

[0188] To limit the opening angle of the compartment cover 101, in some embodiments, the compartment cover 101 is provided with an abutment surface 1011, and the outer shell 200 is provided with a limiting block 1012. When the compartment cover 101 is in the open position, the abutment surface 1011 abuts against the limiting block 1012. Through the abutment cooperation between the abutment surface 1011 on the compartment cover 101 and the limiting block 1012 on the outer shell 200, the opening angle of the compartment cover 101 can be effectively limited. Of course, the opening angle of the compartment cover 101 can also be set by setting the angle at which the compartment cover 101 abuts against the limiting block 1012.

[0189] In some embodiments, the maximum opening angle of the cover 101 relative to the horizontal plane is 120°.

[0190] like Figure 16 and Figure 17As shown, to reduce the automatic falling or opening of the compartment cover 101 without human intervention, this application also includes a hinge assembly 112 connected to the compartment cover 101 and the outer casing 200. The hinge assembly 112 includes a first hinge portion 1121 disposed on the compartment cover 101 and a second hinge portion 1122 disposed on the outer casing 200. A connector 1123 connects the first hinge portion 1121 and the second hinge portion 1122. A damping member 1124 is provided on the connector 1123, which can act between the first hinge portion 1121 and the second hinge portion 1122. By providing the damping member 1124, the automatic falling of the compartment cover 101 in the open state can be reduced, preventing the compartment cover 101 from colliding with the entire power conversion device due to gravity and causing damage. It can also effectively reduce the unintentional opening of the compartment cover 101 in the moving state.

[0191] like Figure 17 and Figure 18 As shown, further, the first hinge portion 1121 is provided with a first connecting hole 11211, and the second hinge portion 1122 is provided with a second connecting hole 11221. The connector 1123 is inserted into the first connecting hole 11211 and the second connecting hole 11221, allowing the first hinge portion 1121 and the second hinge portion 1122 to be rotatably connected relative to each other. Specifically, the connector 1123 is a screw and nut structure, and the damping member 1124 is a ring structure. The damping member 1124 is sleeved on the screw, and the nut is threadedly connected to the screw. The damping member 1124 acts on the first hinge portion 1121 and the second hinge portion 1122, generating a damping force on the first hinge portion 1121 and the second hinge portion 1122. Specifically, the damping member is made of a soft material.

[0192] like Figure 17 and Figure 18 As shown, in some embodiments, during installation, the damping element 1124 is at least partially accommodated within the second connecting hole 11221 and located between the nut and the first hinge portion 1121. When the operator tightens the screw, the nut moves relative to the screw and from one end of the screw to the other. During this process, the nut pushes the damping element 1124. Due to the restrictive effect of the first hinge portion 1121, the damping element 1124 is continuously compressed and deformed, and the force exerted on the inner wall of the second connecting hole 11221 gradually increases. In this way, the magnitude of the damping force between the first hinge portion 1121 and the second hinge portion 1122 can be adjusted to meet the different usage needs of the operator in adjusting the magnitude of the damping force when the cover 101 is opened or closed.

[0193] like Figure 2 and Figure 16As shown, in some embodiments, the hinge assembly 112 is provided on both sides of the pull rod 203. By providing the hinge assembly on both sides of the pull rod 203, the cover 101 has two rotational support points when rotating relative to the outer shell 200, so that the cover 101 can be more stable during rotation and reduce the possibility of damage to the cover 101 or the outer shell 200 due to uneven force on the cover 101.

[0194] In some embodiments, the cover 101 is made of a transparent or translucent material. In some embodiments, the light transmittance of the cover 101 is greater than or equal to 30% and less than or equal to 99%. In some embodiments, the light transmittance of the cover 101 is 30%, 50%, 65%, and 90%. Higher transparency makes it easier for operators to observe the situation inside the battery compartment 100 through the cover 101.

[0195] In some embodiments, a first sensing element is provided on the cover 101, and a second sensing element is provided on the housing 200, capable of sensing the signal of the first sensing element. When the cover 101 is in the closed position, the first sensing element can sense the signal of the second sensing element; when the cover 101 is in the open position, the first sensing element disconnects from the signal sensing of the second sensing element. The opening status of the cover 101 is monitored by the signal sensing of the first and second sensing elements. If the cover 101 is opened while the power conversion device is in use, the power conversion device reduces its operating power to prevent electric shock to the operator, thus protecting the operator. Further, the first and second sensing elements can be Hall effect sensors, photoelectric switches, or mechanical switches, etc.

[0196] like Figure 8 and Figure 16As shown, this application also provides a power conversion device, including a housing 200, a pull rod 203, and a cover 101. The housing 200 includes a battery compartment 100 with an opening, configured to accommodate a battery pack 300. An inverter assembly is disposed within the housing 200, which is electrically connected to the battery pack 300 and can convert the electrical energy of the battery pack 300 into external discharge and / or convert external electrical energy into charging of the battery pack 300. The pull rod 203 is connected to the housing 200 and can extend or retract along the height direction of the power conversion device. The cover 101 is hinged to the edge of the opening of the battery compartment 100 and can pivot relative to the housing 200 to close or open the opening of the battery compartment 100. The height of the pull rod 203 is higher than the height of the opening of the battery compartment 100. The cover 101 has a clearance portion 126, which allows the cover 101 to bypass the pull rod 203 when switching between an open and closed position. By providing a clearance part 126 on the cover 101, interference caused by the pull rod 203 when opening or closing the cover 101 can be avoided. Specifically, the pull rod 203 is a telescopic pull rod 203.

[0197] like Figure 16 and Figure 17 As shown, in some embodiments, an abutment surface 1011 is provided on the edge of the compartment cover 101 near the hinge assembly 112, and a limit block 1012 is provided on the outer shell 200. When the compartment cover 101 is in the open position, the abutment surface 1011 can abut against the limit block 1012. Through the abutment cooperation between the abutment surface 1011 on the compartment cover 101 and the limit block 1012 on the outer shell 200, the opening angle of the compartment cover 101 can be effectively limited. Of course, the opening angle of the compartment cover 101 can also be set by setting the angle at which the compartment cover 101 abuts against the limit block 1012.

[0198] like Figure 2 and Figure 16 As shown, in some embodiments, an external power port 217 located on the same side of the pull rod 203 and disposed on the housing 200 is also included. When the cover 101 is in the open position, the external power port 217 is located below the end of the cover 101. The external power port 217 can be electrically connected to an external power supply such as mains power or solar power supply system. Since there will be a wiring harness when the external power supply is connected, especially when the wiring harness is connected from high to low to the power conversion device, it will obstruct the opening of the cover 101. In this application, the external power port 217 is located below the end of the cover 101, which is beneficial to provide more space for the wiring harness of the external power supply to move at the end of the cover 101.

[0199] like Figure 2 and Figure 16As shown, this application also includes a power conversion device, comprising a housing 200, a pull rod 203, and a cover 101. The housing 200 has a battery compartment 100 with an opening, configured to accommodate a battery pack 300. An inverter assembly is disposed within the housing 200, capable of being electrically connected to the battery pack 300 and converting the electrical energy of the battery pack 300 for external discharge and / or converting external electrical energy for charging the battery pack 300. The pull rod 203 is connected to the housing 200 and can extend or retract along the height direction of the power conversion device. The cover 101 is hinged to the housing 200 and can pivot relative to the housing 200 to close or open the opening of the battery compartment 100. The cover 101 has a clearance portion 126, through which the pull rod 203 can extend and retract when the cover 101 is in the closed or open position. The storage compartment cover 101 has an abutment surface 1011, and the outer casing 200 has a limit block 1012. When the storage compartment cover 101 is in the open position, the abutment surface 1011 abuts against the limit block 1012. The abutment between the abutment surface 1011 on the storage compartment cover 101 and the limit block 1012 on the outer casing 200 effectively limits the opening angle of the storage compartment cover 101. Alternatively, the opening angle of the storage compartment cover 101 can be set by adjusting the angle at which the storage compartment cover 101 abuts against the limit block 1012.

[0200] like Figure 6 , Figure 24 and Figure 25 As shown, in some embodiments, this application also provides a bidirectional energy storage power supply, including a battery pack and an inverter. The battery pack is detachably mounted on the inverter, which can convert external AC power to charge the battery pack and / or convert the battery pack's electrical energy to supply power. The inverter includes two handles 202. The inverter allows the installation of two first-specification battery packs or one second-specification battery pack. The center of gravity 234 of the bidirectional energy storage power supply when installing two first-specification battery packs and when installing one second-specification battery pack is approximately located on the symmetrical plane 235 of the two handles 202, making the overall center of gravity 234 of the bidirectional energy storage power supply relatively concentrated both when the battery pack is not installed and after installation, preventing tipping during daily use and when retrieving the battery pack.

[0201] It should be noted that the aforementioned center of gravity 234 is approximately located on the plane of symmetry 235 of the two handles 202. This can be understood as the center of gravity 234 when installing two first-specification battery packs and the center of gravity 234 when installing one second-specification battery pack being 0.1cm to 1cm away from the plane of symmetry 235 of the two handles 202 on the horizontal plane.

[0202] like Figure 6As shown, in some embodiments, the inverter has a central surface 229 in the vertical direction. The vertical distance between the central surface 229 and the uppermost end of the inverter and the lowermost end of the inverter are equal. The bottom plate 108 of the battery compartment 100 is configured to support the battery pack. The bottom plate 108 is located below the central surface 229. By setting the bottom plate 108 of the battery compartment 100, which is used to support the battery pack, below the central surface 229, the battery pack can be installed and supported in the inverter at a lower position, and the center of gravity 234 of the entire bidirectional energy storage power supply after the battery pack is installed is lower.

[0203] like Figure 6 As shown, in some embodiments, the inverter also includes a battery compartment 100 for mounting a battery pack, and the center of gravity 234 of the bidirectional energy storage power supply is located below the center plane 229 in both the state without the battery pack and the state with the battery pack installed.

[0204] like Figure 24 and Figure 25 As shown, in some embodiments, the inverter device also includes a battery compartment 100 for installing battery packs. The battery compartment 100 has two corresponding side plates with power terminals that can be electrically connected to the first-specification battery pack and the second-specification battery pack. The power terminals on the two side plates are roughly symmetrically distributed with respect to the symmetry plane 235 of the two handles 202. The power terminals for electrically connecting to the first-specification battery pack and the second-specification battery pack are also symmetrically arranged with respect to the symmetry plane 235 of the two handles 202, which fully considers the design layout of centering the center of gravity 234.

[0205] Combination Figure 6 , Figure 8 , Figure 10 , Figure 24 and Figure 25 As shown, in some embodiments, the second-specification battery pack has two output terminals, one of which is electrically connected to one of the power terminals on the two side plates, and the other output terminal is electrically connected to the other of the power terminals on the two side plates. The second-specification battery pack can discharge to the outside or charge itself using the two output terminals.

[0206] Combination Figure 6 , Figure 8 , Figure 10 , Figure 24 and Figure 25 As shown, in some embodiments, the two power terminals are approximately symmetrically distributed about the plane of symmetry 235 of the two handles 202. It should be noted that the power terminals in this application are functionally equivalent to the second terminal 119.

[0207] like Figure 8In some embodiments, the inverter includes an inverter circuit board located below the battery pack when the inverter is fitted with the battery pack. This placement of the inverter circuit board below the battery pack facilitates the removal and insertion of the battery pack from above the inverter.

[0208] like Figure 16 and Figure 20 As shown, in some embodiments, a plurality of wheels 218 are provided below the inverter to support the movement of the inverter. Further, four wheels 218 are provided, which are respectively located at the four corners of the bottom of the inverter.

[0209] like Figure 6 , Figure 24 and Figure 25 This application also provides a bidirectional energy storage power supply, including a battery pack and an inverter. The battery pack is detachably mounted on the inverter, which can convert external AC power to charge the battery pack and / or convert the battery pack's electrical energy to supply power. The inverter includes two handles 202. The inverter allows the installation of two first-specification battery packs or one second-specification battery pack. The center of gravity 234 of the bidirectional energy storage power supply when installing two first-specification battery packs and when installing one second-specification battery pack are both approximately located on the plane of symmetry 235 of the two handles 202. The battery pack can be detached from the inverter to power other tools. The inverter can simultaneously accommodate both first-specification and second-specification battery packs and also detach the battery pack to power other tools, realizing the multi-purpose function of the battery pack. The feature description of the battery pack in this application is functionally equivalent to that of the battery pack 300.

[0210] In some embodiments, the inverter device further includes a battery compartment 100 for installing a battery pack. The battery compartment 100 has two corresponding side plates with power terminals that can be electrically connected to a first-specification battery pack and a second-specification battery pack. The power terminals on the two side plates are approximately symmetrically distributed about the symmetrical plane 235 of the two handles 202.

[0211] In some embodiments, the inverter includes an inverter circuit board located below the battery pack when the inverter is installed. This arrangement of the inverter circuit board below the battery pack facilitates the removal and placement of the battery pack from above the inverter.

[0212] like Figure 6 and Figure 8As shown, this application also provides a power conversion device configured to be electrically connected to a battery pack. The power conversion device includes an inverter assembly, on which the battery pack is detachably mounted. The inverter assembly is capable of converting external AC power to charge the battery pack and / or converting the battery pack's electrical energy to supply power to the outside. The power conversion device includes two handles 202. The power conversion device allows the installation of two first-specification battery packs or one second-specification battery pack. The center of gravity 234 of the power conversion device when installing two first-specification battery packs and when installing one second-specification battery pack are both approximately located on the plane of symmetry 235 of the two handles 202. The power conversion device has a central plane 229 in the vertical direction. The vertical distance between the central plane 229 and the uppermost point of the inverter is equal to the vertical distance between the lowermost point of the inverter. The bottom plate of the battery compartment 100 is configured to support the battery pack, and the bottom plate is located below the central plane 229. This arrangement makes the center of gravity 234 of the power conversion device lower, thus making it more stable.

[0213] Furthermore, the power conversion device of this application allows the insertion of a large battery pack or two relatively small battery packs. When a large battery pack or two small battery packs are inserted, the center of gravity 234 of the power conversion device is also approximately located on the plane of symmetry 235 of the two handles 202.

[0214] like Figure 8 As shown, this application also provides a bidirectional energy storage power supply, including a housing 200, a battery cell 301, an inverter module, wheels 218, a pull rod 203, and a support member 219. The battery cell 301 is located inside the housing 200. The inverter module is disposed inside the housing 200 and is capable of converting the electrical energy of the battery cell 301 for external power supply and / or converting external electrical energy for charging the battery cell 301. The wheels 218 are disposed within the housing 200 and are configured to support the bidirectional energy storage power supply for movement. The pull rod 203 is connected to the housing 200, and when the pull rod 203 is pulled, the bidirectional energy storage power supply can move at an angle on the ground via the wheels 218. The support member 219 is connected to the bottom of the housing 200, and when the bidirectional energy storage power supply is placed horizontally on the ground, the support member 219 supports the entire bidirectional energy storage power supply on the ground, and the wheels 218 do not contact the ground. The wheels enable the bidirectional energy storage power supply to move, allowing operators to easily move it to a designated location as needed. Once moved to the designated location, the support member 219 supports the bidirectional energy storage power supply on the ground and allows the wheels 218 to leave the ground, reducing the load on the wheels 218 and extending their service life.

[0215] like Figure 13 and Figure 14As shown, in some embodiments, when the bidirectional energy storage power supply is placed horizontally on the ground, the lowest end of the walking wheel 218 is higher than the lowest end of the support member 219, so as to ensure that the walking wheel 218 does not contact the ground when the support member 219 supports the entire bidirectional energy storage power supply on the ground.

[0216] In some embodiments, the bottom of the housing 200 is provided with a limiting portion 2191 that can restrict the movement of the support member 219. The support member 219 is at least partially located within the limiting portion 2191, which serves to position and limit the movement of the support member 219.

[0217] like Figure 13 , Figure 14 , Figure 23 , Figure 24 as well as Figures 27 to 28 As shown, to facilitate operators switching the bidirectional energy storage power supply from an inclined (dragging) state to a horizontal position, in some embodiments, this application also provides an auxiliary support member 230 at the bottom of the outer casing 200. Along the axis perpendicular to the walking wheel 218, the auxiliary support member 230 is at least partially located between the walking wheel 218 and the support member 219. Since there is a certain distance between the walking wheel 218 and the support member 219, by adding the auxiliary support member 230 to the walking wheel 218 and the support member 219, it is to ensure that when the entire bidirectional energy storage power supply is switched from an inclined state to a horizontal state by moving the pull rod 203, the auxiliary support member 230 can contact the ground and generate friction before the support member 219. Specifically, when the user pulls the bidirectional energy storage power supply, to save effort, the center of gravity of the entire bidirectional energy storage power supply will be adjusted to be located at or approximately directly above the walking wheel. At this time, the weight of the bidirectional energy storage power supply is almost or entirely borne by the walking wheel (e.g., Figure 27 As shown in the diagram, the lever exerts almost no downward pressure on the user's hand; the user only needs to apply a horizontal force to move the bidirectional energy storage power supply. However, when the user switches the bidirectional energy storage power supply from an inclined (dragging) state to a horizontal position, its center of gravity shifts away from the user and gradually moves away from directly above the wheels. At this time, as... Figure 28 As shown, gravity G1 has a first component F1 that causes the bidirectional energy storage power supply to rotate, and another component F2 that is approximately directed towards the wheel (the direction of F2 is from the center of gravity of the power supply towards the contact point between the traveling wheel 218 and the ground). Since the traveling wheel 218 can only provide a vertically upward supporting force to the bidirectional energy storage power supply, this force F2 can cause the power supply to produce a horizontal acceleration, that is, it will cause the bidirectional energy storage power supply to produce a horizontal displacement. After the auxiliary support 230 contacts the ground, the ground can not only provide a vertically upward supporting force to 230, but also generate a horizontal frictional force. This frictional force overcomes the force F2 that drives the power supply to move horizontally, so that the power supply will not move horizontally until the bidirectional energy storage power supply returns to a horizontal state.

[0218] Furthermore, when the bidirectional energy storage power supply is placed horizontally on the ground, the lowest end of the auxiliary support 230 is lower than the lowest end of the walking wheel 218 and higher than the lowest end of the support 219.

[0219] like Figure 14 As shown, in some embodiments, the projection of the auxiliary support 230 at least partially overlaps with the projection of the walking wheel 218 along the axis perpendicular to the walking wheel 218.

[0220] like Figure 15 As shown, in some embodiments, the outer casing 200 includes a base plate and side plates arranged around the base plate. The wheels 218 are located at the junction of the base plate and the side plates, so that when the operator tilts the bidirectional energy storage power supply, the wheels 218 can make contact with the ground in a relatively quick manner, making it easy to drag.

[0221] like Figure 15 As shown, in some embodiments, two wheels 218 are provided, with the two wheels 218 located on both sides of the pull rod 203. By placing the two wheels 218 on both sides of the pull rod 203, two supporting wheels 218 are provided on both sides of the pull rod 203 and at the bottom of the bidirectional energy storage power supply. This prevents uneven force distribution on both sides of the pull rod 203 when it is pulled, and helps the bidirectional energy storage power supply to move stably on the ground.

[0222] like Figure 15 As shown, in some embodiments, multiple support members 219 are provided, and multiple support members 219 are provided at the bottom edge of the housing 200. The provision of multiple support members 219 makes the bidirectional energy storage power supply more stable when placed horizontally.

[0223] like Figure 13 and Figure 14As shown, this application also provides a bidirectional energy storage power supply, including a housing 200, a battery compartment 100, an inverter module, wheels 218, a pull rod 203, and a support member 219. The battery compartment 100 is at least partially located within the housing 200 and is configured to detachably mount a battery pack 300. The inverter module is disposed within the receiving space between the housing 200 and the battery compartment 100, and is capable of converting external electrical energy and charging the battery pack 300. The wheels 218 are disposed on the housing 200 and are configured to support the bidirectional energy storage power supply's movement. The pull rod 203 is connected to the housing 200, and when the pull rod 203 is pulled, the bidirectional energy storage power supply can move at an angle on the ground via the wheels 218. The support member 219 is connected to the bottom of the housing 200, and when the bidirectional energy storage power supply is placed horizontally on the ground, the support member 219 supports the bidirectional energy storage power supply on the ground, and the wheels 218 do not contact the ground.

[0224] like Figure 13 and Figure 14 As shown, in some embodiments, when the bidirectional energy storage power supply is placed horizontally on the ground, the distance between the walking wheel 218 and the ground is greater than or equal to 5 mm and less than or equal to 45 mm.

[0225] like Figure 5 As shown, in some embodiments, the battery compartment 100 is provided with a first drain hole, and the outer casing 200 is provided with a second drain hole. A water guide pipe 228 is connected between the first drain hole and the second drain hole to guide the liquid that falls into the battery compartment 100 out of the battery compartment 100 so as to avoid damage to the battery pack 300, etc.

[0226] like Figure 13 and Figure 14 As shown, a bidirectional energy storage power supply includes a housing 200, a battery compartment 100, an inverter module, wheels 218, and a support member 219. The battery compartment 100 is at least partially located within the housing 200 and is configured to detachably mount a battery pack 300. The inverter module is disposed within the receiving space between the housing 200 and the battery compartment 100, and is capable of converting external electrical energy and charging the battery pack 300. The wheels 218 are disposed within the housing 200 and are configured to support the bidirectional energy storage power supply for movement. The bidirectional energy storage power supply can move at an angle on the ground while being towed by a trailer (such as a ride-on lawnmower or all-terrain vehicle). The support member 219 is connected to the bottom of the housing 200. When the bidirectional energy storage power supply is placed horizontally on the ground, the support member 219 supports the bidirectional energy storage power supply on the ground, and the wheels 218 do not contact the ground.

[0227] like Figure 20As shown, this application also provides a power conversion device, including a housing 200, a battery compartment 100, an inverter module, and a plurality of wheel assemblies. The battery compartment 100 is at least partially located within the housing 200 and is configured to detachably mount a battery pack 300. The inverter module is disposed within a receiving space between the housing 200 and the battery compartment 100, and the inverter module is capable of converting external electrical energy and charging the battery pack 300. The plurality of wheel assemblies are configured to support the power conversion device in movement on the ground. Each wheel assembly includes a wheel 218 and a support bracket for mounting the wheel 218. The support bracket includes a bracket connection portion 236, which can be connected to the base plate of the housing 200. The inverter module is located between the plurality of support connection portions 236 in a horizontal direction parallel to the base plate of the housing 200. This arrangement helps to reserve a position on the base plate of the housing 200 for connecting the bracket connection part 236, so as to prevent the inverter module located on the other side of the base plate from interfering with the installation of the walking wheel assembly.

[0228] like Figure 20 and Figure 21 As shown, in some embodiments, the bottom plate of the outer casing 200 is provided with a bottom plate connecting portion that is installed and engaged with the bracket connecting portion 236. Further, the bracket connecting portion 236 is a protrusion 2181 or a groove 237, and the bottom plate connecting portion is a groove 237 or a protrusion 2181 that can be detachably engaged with the bracket connecting portion 236. The bracket connecting portion 236 and the bottom plate connecting portion are connected by a plug-in connection, thereby achieving the installation and fixation of the wheel assembly at the bottom of the outer casing 200.

[0229] like Figure 20 and Figure 21 As shown, in some embodiments, in order to achieve stable installation of the walking wheel assembly on the housing 200 and prevent it from easily detaching from the base plate of the housing 200, a recess 2182 is provided circumferentially along the protrusion 2181, and a semi-circular retaining ring 2183 is provided around the recess 2182, with the semi-circular retaining ring 2183 at least partially located outside the recess 2182. The semi-circular retaining ring 2183 is an elastic retaining ring. In some embodiments, the diameter of the groove 237 extends in the vertical direction of the power conversion device, and the diameter gradually increases from top to bottom. During installation, as the protrusion 2181 is gradually inserted into the groove 237, the diameter of the groove 237 gradually shrinks, and the semi-circular retaining ring 2183 on the protrusion 2181 will gradually press and clamp against the inner wall of the groove 237. The semi-circular retaining ring 2183 will gradually clamp against the protrusion 2181 and generate friction between the semi-circular retaining ring 2183, the protrusion 2181, and the groove 237. This allows the wheel assembly to be installed relatively stably on the base plate of the outer casing 200.

[0230] It should be noted that when the bracket connection part is provided with a protrusion and the traveling wheel is provided with a groove, the diameter of the groove gradually narrows from top to bottom. During installation, the traveling wheel is moved towards the protrusion of the bracket connection part through the groove and the two are inserted into each other.

[0231] In this application, the walking wheel assembly includes at least two walking wheels 218 disposed at the bottom of the energy storage bidirectional power supply or power conversion device.

[0232] like Figure 19 As shown in Figure 20, this application also provides a bidirectional energy storage power supply, including a housing 200, a battery compartment 100, an inverter module, and multiple walking mechanisms. The battery compartment 100 is at least partially located within the housing 200 and is configured to detachably mount a battery pack 300. The inverter module is disposed within a receiving space between the housing 200 and the battery compartment 100, and the inverter module is capable of converting external electrical energy and charging the battery pack 300. Multiple walking mechanisms are configured to support the bidirectional energy storage power supply on the ground, and each walking mechanism includes a walking connection portion for connecting to the base plate of the housing 200. The inverter module is located between the multiple walking connections in a horizontal direction parallel to the base plate of the housing 200. This arrangement helps to reserve space for the walking connections on the base plate of the housing 200, preventing the inverter module located on the other side of the base plate from interfering with the installation of the walking wheel assembly.

[0233] Combination Figure 1 and Figure 2 As shown, in some embodiments, a vent for heat dissipation of the inverter module is also included on the side plate of the housing 200. The vent is located outside the traveling mechanism in a horizontal direction parallel to the base plate of the housing 200. The vent helps to dissipate the heat generated during inverter module operation. Furthermore, cooling fans are provided at both ends of the inverter module. In the ventilation direction of the cooling fans, the air outlets of the cooling fans at least partially overlap with the vents on the housing. This arrangement allows airflow to be directly discharged from the housing 200, reducing kinetic energy loss and improving heat dissipation efficiency.

[0234] In some embodiments, the base plate of the outer casing 200 is provided with a base plate connecting portion that is installed and mates with the walking connecting portion. In some embodiments, the base plate connecting portion is the bracket connecting portion 236 described above.

[0235] like Figure 19 and Figure 20As shown, this application also provides a power conversion device, including a housing 200, a battery compartment 100, an inverter module, a control module, and multiple walking mechanisms. The battery compartment 100 is at least partially located within the housing 200 and is configured to detachably mount a battery pack 300. The inverter module is disposed within a receiving space between the housing 200 and the battery compartment 100, and is capable of converting external electrical energy and charging the battery pack 300. The control module is disposed within the receiving space between the housing 200 and the battery compartment 100, and is used at least to control the operation of the inverter module; in the vertical direction of the power conversion device, the control module is located above the inverter module. Multiple walking mechanisms are configured to support the power conversion device in movement on the ground, and each walking mechanism includes a walking connection portion for connection to the base plate of the housing 200. The inverter module is located between the multiple walking connections in a horizontal direction parallel to the base plate of the housing 200.

[0236] In some embodiments, the bottom plate of the outer casing 200 is provided with a bottom plate connecting portion that is installed and cooperates with the walking connecting portion. Specifically, the walking connecting portion is a protrusion 2181 or a groove 237, and the bottom plate connecting portion is a groove 237 or a protrusion 2181.

[0237] In some embodiments, the device also includes at least one vent disposed on the side panel of the housing 200 for heat dissipation of the inverter module, the vent being capable of exchanging heat between the airflow within the housing space and the airflow outside the power conversion device.

[0238] like Figure 11 As shown, this application also provides a power conversion device, including a housing, a battery pack, and an inverter module. The battery pack is detachably installed in the housing. The inverter module can convert the electrical energy of the battery pack for external discharge and / or convert external electrical energy for charging the battery pack. The housing is provided with a heat dissipation vent, and a protective mesh assembly 232 is provided at the heat dissipation vent to cover it. The protective mesh assembly 232 includes a first protective mesh 2321 and a second protective mesh 2322 with different mesh sizes. By setting two layers of protective meshes with different mesh sizes, while ensuring ventilation, it can effectively reduce the entry of debris into the housing, protect the components inside the housing, and extend their service life.

[0239] like Figure 11 and Figure 12As shown, in some embodiments, the first protective net 2321 is located inside the second protective net 2322, and the mesh size of the first protective net 2321 is smaller than that of the second protective net 2322. In some embodiments, the first protective net 2321 and the second protective net 2322 are connected by adhesive. In some embodiments, the receiving portion 233 of the outer casing 200 is provided with a slot 2332, and the first protective net 2321 and the second protective net 2322 are inserted into the slot 2332 to achieve plug-and-play installation on the outer casing 200, which is simple and quick to assemble. In some embodiments, the first protective net 2321 and the second protective net 2322 are connected by magnetic attraction, and the first protective net 2321 and the second protective net 2322 can be magnetically attracted together and then inserted into the slot 2332 for installation.

[0240] In some embodiments, the mesh size of the first protective net 2321 is greater than or equal to 2 mm and less than or equal to 3 mm. In some embodiments, the mesh size of the first protective net 2321 is greater than or equal to 2 mm, 2.5 mm, or 3 mm. It should be noted that if the mesh of the first protective net 2321 is a round hole, its mesh size is the diameter of that round hole. If the mesh of the first protective net 2321 is an irregular hole, its mesh size is the diameter of the outer circle of that hole.

[0241] In some embodiments, heat dissipation vents are provided on both sides of the housing, and each heat dissipation vent is provided with a protective mesh assembly 232, with the inverter module located between the corresponding heat dissipation vents.

[0242] like Figure 11 As shown, in some embodiments, the housing is provided with a receiving portion 233 capable of accommodating the protective net assembly 232. The receiving portion 233 is formed by recessing inward from the outer surface of the housing, which serves to limit the installation of the protective net assembly 232.

[0243] like Figure 11 and Figure 12 As shown, in some embodiments, a heat dissipation vent is disposed in the receiving portion 233, and the receiving portion 233 forms a third protective net 2331, which is an air intake grille.

[0244] In some embodiments, the second protective net 2322 is a grid structure with large mesh size, which facilitates air intake and can also protect and support the honeycomb structure. The first protective net 2321 is a honeycomb structure with small mesh size, which can effectively prevent small flying insects and impurities from entering the shell.

[0245] like Figure 11As shown, this application also provides a power conversion device, including a housing, a battery pack, an inverter module, and a moving component. The battery pack is detachably mounted on the housing. The inverter module is capable of converting the electrical energy from the battery pack for external discharge and / or converting external electrical energy for charging the battery pack. The housing is provided with a heat dissipation vent, and a protective mesh assembly 232 is provided at the heat dissipation vent to cover it. The protective mesh assembly 232 includes a first protective mesh 2321 and a second protective mesh 2322 with different mesh sizes. The moving component is configured to support the movement of the entire power conversion device.

[0246] In some embodiments, the moving component is a wheel 218 disposed at the bottom of the housing, used to support the movement of the entire power conversion device.

[0247] like Figure 11 As shown, this application also provides a bidirectional energy storage power supply, including a housing, multiple battery cells 301, and an inverter module. The multiple battery cells 301 are disposed within the housing. The inverter module is capable of converting the electrical energy of the multiple battery cells 301 for external discharge and / or converting external electrical energy for charging the multiple battery cells 301. The housing is provided with symmetrically arranged heat dissipation vents, and a protective mesh assembly 232 is provided at each heat dissipation vent to cover the vents. The protective mesh assembly 232 includes a first protective mesh 2321 and a second protective mesh 2322 with different mesh sizes.

[0248] This application is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions exist without departing from the principles and scope of this application. The scope of protection of this application is determined by the claims.

Claims

1. A bidirectional energy storage power supply, characterized in that, include: A battery compartment is configured to be detachably assembled into a battery pack. The battery compartment includes a first air inlet and a first air outlet. A first airflow channel is formed between the battery pack and the battery compartment. The path of the first airflow channel includes: airflow entering the battery compartment from the first air inlet enters the battery pack and then exits the battery compartment from the first air outlet. An outer casing is disposed outside the battery compartment. The outer casing includes a second air inlet and a second air outlet, and a second airflow channel is formed between the battery compartment and the outer casing. An inverter circuit board is configured to convert the electrical energy of the battery pack into external discharge and / or convert external electrical energy into charging of the battery pack. The inverter circuit board is located between the battery compartment and the outer casing and is at least partially located within the second airflow channel. Airflow entering the second airflow channel from the second air inlet passes through the inverter circuit board and is discharged from the outer casing from the second air outlet. The airflow discharged from the first air outlet can be discharged from the outer casing through the second air outlet.

2. The bidirectional energy storage power supply according to claim 1, characterized in that: The battery pack includes a battery pack air inlet and a battery pack air outlet. The airflow in the first airflow channel enters the battery pack through the battery pack air inlet, passes through the battery cells in the battery pack, and then exits the battery pack through the battery pack air outlet and exits the battery compartment through the first air outlet.

3. The bidirectional energy storage power supply according to claim 1 or 2, characterized in that: The battery compartment includes a first side plate and a second side plate that are respectively arranged. Both the first side plate and the second side plate are provided with a first air outlet. A cooling fan for exhausting air to the outside of the battery compartment is provided on the first air outlet. The battery pack is located between the two first air outlets.

4. The bidirectional energy storage power supply according to claim 1, characterized in that: The battery pack is provided with a first terminal, and the battery compartment is provided with a second terminal. When the battery pack is assembled into the battery compartment, the first terminal and the second terminal are electrically connected. The airflow entering the battery compartment from the first air inlet passes through the first terminal and the second terminal and is discharged from the first air outlet (to dissipate heat from the battery pack's electrical terminals).

5. The bidirectional energy storage power supply according to claim 4, characterized in that: In the battery pack assembly direction, the first terminal and the second terminal are located between the first air inlet and the first air outlet.

6. The bidirectional energy storage power supply according to claim 1 or 4, characterized in that: The battery compartment is a receiving cavity with an opening, and the battery pack is detachably disposed within the receiving cavity. The first air inlet is at least a portion of the opening.

7. The bidirectional energy storage power supply according to claim 1, characterized in that: Between the battery compartment and the outer casing, there is at least a control circuit board capable of controlling the operation of the inverter circuit board, and an output circuit board capable of receiving power from at least one of the control circuit board and the inverter circuit board. The airflow that enters the second airflow channel through the second air inlet flows through the control circuit board, the output circuit board and the inverter circuit board and is discharged from the outer casing through the second air outlet.

8. The bidirectional energy storage power supply according to claim 7, characterized in that: A receiving space is formed between the battery compartment and the outer shell, and the second airflow channel is at least partially located in the receiving space, the receiving space comprising: A first space is located on one side of the battery compartment, and the control circuit board is located within the first space; A second space is disposed on the opposite side of the battery compartment corresponding to the first space, and the output circuit board is located in the second space; and, A third space is disposed between the first space and the second space, and the inverter circuit board is located in the third space. The third space is located between the first space and the second space and below the battery compartment. The airflow entering the second airflow channel through the second air inlet passes through the control circuit board, output circuit board and inverter circuit board in the accommodating space and is then discharged through the second air outlet.

9. The bidirectional energy storage power supply according to claim 8, characterized in that: The housing includes a third side plate and a fourth side plate that are correspondingly arranged. The second air inlet is arranged on the third side plate, and the second air outlet is arranged on the fourth side plate. The control circuit board, the output circuit board, and the inverter circuit board are located between the second air inlet and the second air outlet.

10. The bidirectional energy storage power supply according to claim 9, characterized in that: At least one of the second air inlet and the second air outlet is equipped with a cooling fan.

11. The bidirectional energy storage power supply according to claim 7 or 8, characterized in that: The battery pack is located above the inverter circuit board.

12. The bidirectional energy storage power supply according to claim 1, characterized in that: The first air outlet is located adjacent to the second air outlet.

13. The bidirectional energy storage power supply according to claim 7, characterized in that: The battery compartment includes a first side plate and a second side plate, each with a first air outlet. The outer shell includes a third side plate and a fourth side plate, with a second air inlet on the third side plate and a second air outlet on the fourth side plate. The first air outlet is located in the same straight line direction as the first air inlet, the second air inlet, and the second air outlet in its air outlet direction.

14. The bidirectional energy storage power supply according to claim 13, characterized in that: The first air outlet is located adjacent to the second airflow channel, and a guide component is provided at the first air outlet to guide the airflow discharged from the first air outlet to the second air outlet.

15. The bidirectional energy storage power supply according to claim 14, characterized in that: The flow guide is a tubular or plate-like structure.

16. The bidirectional energy storage power supply according to claim 15, characterized in that: The flow guide is provided with a wire harness limiting part, and the battery compartment is provided with an external terminal for electrical connection with the battery pack. A wire harness is connected between the external terminal and the control circuit board. The wire harness is limited by the wire harness limiting part and is located outside the flow guide.

17. The bidirectional energy storage power supply according to claim 1, characterized in that: The battery compartment forms a receiving cavity, which is configured to accommodate two first-size battery packs or one second-size battery pack.

18. The bidirectional energy storage power supply according to claim 1, characterized in that: The inverter circuit board is equipped with inverter components, which are located within the second airflow channel.

19. A bidirectional energy storage power supply, characterized in that, include: A battery compartment is configured to detachably accommodate a battery pack. The battery compartment includes a first air inlet and a first air outlet for cooling airflow, wherein airflow entering the battery compartment through the first air inlet enters the battery pack and exits the battery compartment through the first air outlet. The outer casing includes a second air inlet and a second air outlet; An inverter module is located between the battery compartment and the outer casing. The inverter module is configured to convert the electrical energy of the battery pack into external discharge and / or convert external electrical energy into charging of the battery pack. The airflow entering the outer casing through the second air inlet flows through the inverter module and is discharged from the outer casing through the second air outlet. The airflow discharged from the first air outlet can be discharged from the outer casing through the second air outlet.

20. The bidirectional energy storage power supply according to claim 19, characterized in that: The first air outlet and the second air outlet are disposed adjacent to each other. A cooling fan is disposed adjacent to the first air outlet and the second air outlet. The cooling fan is configured to discharge the airflow inside the battery compartment and between the battery compartment and the outer casing through the second air outlet to the outer casing.

21. The bidirectional energy storage power supply according to claim 20, characterized in that: In the airflow direction of the first air outlet or the second air outlet, the cooling fan is located between the first air outlet and the second air outlet.

22. A power conversion device, characterized in that, include: A battery compartment is configured to be detachably assembled into a battery pack. The battery compartment includes a first air inlet and a first air outlet. A first airflow channel is formed between the battery pack and the battery compartment. The path of the first airflow channel includes: airflow entering the battery compartment from the first air inlet enters the battery pack and then exits the battery compartment from the first air outlet. An outer casing is disposed outside the battery compartment. The outer casing includes a second air inlet and a second air outlet, and a second airflow channel is formed between the battery compartment and the outer casing. An inverter circuit board is configured to convert the electrical energy of the battery pack into external discharge or external electrical energy into charging of the battery pack. The inverter circuit board is located between the battery compartment and the outer casing and is at least partially located within the second airflow channel. Airflow entering the second airflow channel from the second air inlet passes through the inverter circuit board and is discharged from the outer casing from the second air outlet. The first air outlet is located adjacent to the second air outlet, and the airflow discharged from the first air outlet can be discharged from the outer casing through the second air outlet.

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