Energy storage bidirectional power supply, power conversion apparatus, and outdoor work vehicle system

Abstract

The present application discloses an energy storage bidirectional power supply, a power conversion apparatus, and an outdoor work vehicle system. The energy storage bidirectional power supply comprises: a first housing, configured to accommodate a battery pack, the first housing being provided with a first vent capable of exchanging heat between the inside and the outside of the first housing; a second housing, the first housing being at least partially accommodated in the second housing, and the second housing being provided with a second vent; an electrical energy conversion circuit board, configured to at least be able to convert electrical energy of the battery pack and output the electrical energy to the outside, the electrical energy conversion circuit board being located in an accommodation space formed by the first housing and the second housing, and the electrical energy conversion circuit board in the accommodation space being capable of exchanging heat with an external air flow by means of the second vent; in an air outlet direction of the second vent, a projection of the first vent at least partially overlaps with a projection of the second vent. The energy storage bidirectional power supply, by means of providing a second vent on a second housing, takes into consideration both heat dissipation of the internal circuit conversion circuit board and heat dissipation in the first housing.

Description

Energy storage bidirectional power supply, power conversion device and outdoor working vehicle system [TECHNICAL FIELD]

[0001] The present application relates to the technical field of new energy, in particular to an energy storage bidirectional power supply, a power conversion device and an outdoor working vehicle system. [BACKGROUND]

[0002] With the development of new energy technology, garden tools driven by new energy power gradually replace traditional fuel garden tools to work on lawns, hedges, landscape flowers and trees.

[0003] New energy power-driven garden tools include riding lawn mowers, intelligent lawn mowers, hedge trimmers and industrial fans. However, due to the variety of garden tools, different chargers need to be matched when using different garden tools, and different garden tools need to use different chargers, which can easily lead to poor user experience and increase user costs.

[0004] Traditional chargers have single functions and cannot meet the charging of different specifications of battery packs, nor do they support charging of household appliances such as 3C products. Moreover, the heat dissipation and ventilation structure of the traditional charger is complex, and the heat dissipation effect is general.

[0005] Therefore, it is necessary to provide an improved energy storage bidirectional power supply to overcome the defects of the prior art. [SUMMARY]

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide an energy storage bidirectional power supply with good heat dissipation effect, a power conversion device and an outdoor working vehicle system.

[0007] The purpose of the present application is achieved by the following technical solutions:

[0008] In a first aspect, the technical solution adopted by the present application to solve the problems of the prior art is: an energy storage bidirectional power supply, comprising:

[0009] a battery pack,

[0010] a battery compartment configured to accommodate the battery pack, the battery compartment being provided with a first ventilation opening capable of exchanging heat between the inside and outside of the battery compartment;

[0011] an outer shell, the battery compartment being at least partially accommodated in the outer shell, the outer shell being provided with a second ventilation opening;

[0012] An electric energy conversion circuit board configured to at least convert and output electric energy of the battery pack, the electric energy conversion circuit board being located in the accommodating space formed by the battery compartment and the outer shell, the electric energy conversion circuit board in the accommodating space being capable of exchanging heat with external airflow through the second air vent;

[0013] In the ventilation direction of the second air vent, a projection of the first air vent at least partially overlaps a projection of the second air vent.

[0014] In some embodiments, the battery pack includes a battery shell and an electric core disposed in the battery shell, the battery shell being provided with a third air vent for dissipating heat of the electric core inside the battery shell, in the ventilation direction of the second air vent, a projection of the third air vent at least partially overlaps a projection of the second air vent.

[0015] In some embodiments, the first air vent is provided with a first heat dissipation fan for dissipating heat inside the battery pack, in the ventilation direction of the second air vent, a projection of the first heat dissipation fan at least partially overlaps a projection of the first air vent.

[0016] In some embodiments, the accommodating space is provided with a second heat dissipation fan for dissipating heat of the electric energy conversion circuit board, in the ventilation direction of the second air vent, a projection of the second heat dissipation fan at least partially overlaps a projection of the second air vent.

[0017] In some embodiments, in the ventilation direction of the second air vent, a projection of the electric energy conversion circuit board at least partially overlaps a projection of the second air vent.

[0018] In some embodiments, the accommodating space includes: a first space disposed at one side of the battery compartment, the first space being provided with a first circuit board;

[0019] a second space disposed at the other side of the battery compartment opposite to the first space, the second space being provided with a second circuit board;

[0020] a third space disposed between the first space and the second space, the electric energy conversion circuit board being located in the third space;

[0021] The first space, the second space and the third space are all capable of exchanging heat with external air through the second air vent.

[0022] In some embodiments, the first circuit board comprises a display panel configured to display at least power information of the battery pack, and the second circuit board comprises a control circuit board configured to control the power conversion circuit board to perform power conversion.

[0023] The application also provides a power conversion device, comprising:

[0024] a housing;

[0025] a battery compartment at least partially accommodated in the housing, the battery compartment being capable of accommodating a battery pack, the battery pack being capable of being detached from the power conversion device to supply power to a power tool;

[0026] an inverter module arranged in an accommodation space formed by the battery compartment and the housing, the inverter module being capable of converting power of the battery pack and discharging externally and / or converting external power to charge the battery pack;

[0027] wherein the battery compartment is provided with a first vent for heat dissipation of the battery pack, and the housing is provided with a second vent for heat dissipation of the accommodation space, and in the ventilation direction of the second vent, the projection of the first vent at least partially overlaps the projection of the second vent.

[0028] In some embodiments, the battery compartment comprises a first side plate and a second side plate arranged correspondingly, and the first side plate and the second side plate are both provided with the first vent;

[0029] the housing comprises a third side plate and a fourth side plate arranged correspondingly, and the third side plate and the fourth side plate are both provided with the second vent;

[0030] in the ventilation direction of the second vent, the projection of the first vent on the first side plate at least partially overlaps the projection of the second vent on the adjacent third side plate;

[0031] in the ventilation direction of the second vent, the projection of the first vent on the second side plate at least partially overlaps the projection of the second vent on the adjacent fourth side plate.

[0032] In some embodiments, the first vent on the first side plate and the first vent on the second side plate are both provided with a first heat dissipation fan.

[0033] In some embodiments, the first heat dissipation fans are both configured to exhaust air outside the battery compartment.

[0034] In some embodiments, the battery pack is provided with a first terminal electrically connected to the outside, and the first side plate and the second side plate are each provided with a second terminal electrically connected to the first terminal, and the second terminal is located above the first vent, and the airflow flowing through the first terminal and the second terminal can be discharged from the power conversion device through the first vent and the second vent.

[0035] In some embodiments, the battery compartment is provided with a compartment cover, and a gap for airflow is provided between the compartment cover and the battery compartment, and the airflow entering the battery compartment through the gap can at least partially flow through the first terminal and the second terminal and be discharged from the power conversion device through the first vent and the second vent.

[0036] In some embodiments, the accommodation space comprises:

[0037] A first space is provided on one side of the battery compartment, and the first space is provided with a first circuit board;

[0038] A second space is provided on the other side of the battery compartment opposite to the first space, and the second space is provided with a second circuit board;

[0039] A third space is provided between the first space and the second space, and the inverter module is located in the third space;

[0040] The first space, the second space and the third space are located between the third side plate and the fourth side plate, and the gas entering the outer shell through the second vent of the third side plate can flow through the first space, the second space and the third space and then flow out of the outer shell through the second vent of the fourth side plate.

[0041] In some embodiments, the first circuit board is arranged to extend in the ventilation direction of the second vent in the first space;

[0042] The second circuit board is arranged to extend in the ventilation direction of the second vent in the second space; and the inverter module is arranged to extend in the ventilation direction of the second vent in the third space.

[0043] In some embodiments, the inverter module is provided with a second heat dissipation fan at each end, and each second heat dissipation fan is at least partially overlapped with the second vent adjacent thereto in the ventilation direction of the second vent.

[0044] In some embodiments, the second heat dissipation fan at one end of the inverter module is configured to blow air flow to the inverter module, and the second heat dissipation fan at the other end of the inverter module is configured to extract the air flow flowing through the inverter module.

[0045] In some embodiments, in the ventilation direction of the second ventilation port, the projection of the inverter module at least partially overlaps with the projection of the second ventilation port on the third side plate and with the projection of the second ventilation port on the fourth side plate.

[0046] In some embodiments, the third side plate and the fourth side plate are each provided with a third cooling fan corresponding to the second ventilation port, and the third cooling fan is capable of discharging hot air in the battery compartment and the accommodation space out of the power conversion device.

[0047] In some embodiments, in the ventilation direction of the second ventilation port, the projection of any one of the first ventilation port on the first side plate, the first ventilation port on the second side plate, the second ventilation port on the third side plate, and the second ventilation port on the fourth side plate at least partially overlaps with the projection of each of the other three.

[0048] In some embodiments, the first terminal at one end of the battery pack is capable of supplying power to the second terminal on the first side plate, the first terminal at the other end of the battery pack is capable of supplying power to the second terminal on the second side plate, and the inverter module is capable of receiving power from the second terminal on the first side plate and the second terminal on the second side plate and converting the power to discharge externally.

[0049] In some embodiments, the first terminal at one end of the battery pack is electrically connected to the second terminal on the first side plate, the first terminal at the other end of the battery pack is electrically connected to the second terminal on the second side plate, and the inverter module is capable of receiving power from the external power supply and converting the power to charge the battery pack.

[0050] The application also provides an outdoor work vehicle system, comprising:

[0051] a battery pack;

[0052] a power conversion device, comprising:

[0053] an outer housing provided with an external power supply interface capable of being electrically connected to an external power supply;

[0054] a battery compartment at least partially accommodated in the outer housing, the battery compartment being capable of accommodating the battery pack;

[0055] an inverter module arranged in the accommodation space formed by the battery compartment and the outer housing, the inverter module being capable of receiving power from the external power supply and converting the power to supply the battery pack;

[0056] The first ventilation opening is arranged on the battery compartment for heat dissipation of the battery pack, and the second ventilation opening is arranged on the shell for heat dissipation of the accommodating space.

[0057] The outdoor work vehicle is capable of being connected with the power conversion device, and the power conversion device stops charging the battery pack when the power conversion device converts the electric energy of the external power source and charges the energy device on the outdoor work vehicle.

[0058] The application further provides an outdoor work vehicle system, comprising:

[0059] The power conversion device comprises:

[0060] The outer shell is provided with an external power source interface for electrical connection with an external power source.

[0061] The battery compartment is at least partially accommodated in the outer shell and is capable of accommodating a battery pack.

[0062] The inverter module is arranged in the accommodating space formed by the battery compartment and the outer shell and is electrically connected with the external power source interface.

[0063] The first ventilation opening is arranged on the battery compartment for heat dissipation of the battery pack, and the second ventilation opening is arranged on the shell for heat dissipation of the accommodating space.

[0064] The outdoor work vehicle is capable of being connected with the power conversion device, and the power conversion device is capable of converting the commercial power electric energy into electric energy for charging the energy device on the outdoor work vehicle.

[0065] In some embodiments, the battery pack is capable of being detached from the power conversion device and supplying power to the outdoor work vehicle.

[0066] Compared with the prior art, the application has the following beneficial effects:

[0067] The energy storage bidirectional power supply of the application is provided with a first air vent on a battery compartment for accommodating a battery pack, a second air vent on an outer shell for accommodating the battery compartment, and a circuit conversion circuit board between the battery compartment and the outer shell. The projection of the first air vent and the projection of the second air vent are at least partially overlapped in the air vent direction of the second air vent. The second air vent can discharge the air flow through the electric energy conversion circuit board, and the first air vent can discharge the air flow for heat dissipation of the battery pack.

[0068] The power conversion device of the application comprises a battery compartment and an outer shell. The battery compartment is at least partially accommodated in the outer shell, and an inverter module is arranged between the battery compartment and the outer shell. The battery compartment is detachably installed with a battery pack. The battery compartment is provided with a first air vent for heat dissipation of the battery pack. The outer shell is provided with a second air vent. The first air vent and the second air vent are arranged adjacent to each other, and the projection of the first air vent and the projection of the second air vent are at least partially overlapped in the air vent direction of the second air vent. The second air vent can discharge the air flow through the electric energy conversion circuit board, and the first air vent can discharge the air flow for heat dissipation of the battery pack.

[0069] The outdoor work vehicle system of the application comprises a power conversion device and an outdoor work vehicle. The power conversion device comprises a battery compartment and an outer shell. The battery compartment is at least partially accommodated in the outer shell, and an inverter module is arranged between the battery compartment and the outer shell. The battery compartment is detachably installed with a battery pack. The battery compartment is provided with a first air vent for heat dissipation of the battery pack. The outer shell is provided with a second air vent. The first air vent and the second air vent are arranged adjacent to each other, and the projection of the first air vent and the projection of the second air vent are at least partially overlapped in the air vent direction of the second air vent. The second air vent can discharge the air flow through the electric energy conversion circuit board, and the first air vent can discharge the air flow for heat dissipation of the battery pack. The power conversion device can convert the mains electric energy into electric energy for charging the energy device on the outdoor work vehicle.

[0070] In addition, the outdoor work vehicle can be connected with the power conversion device. When the power conversion device converts the electric energy of the external power supply and charges the energy device on the outdoor work vehicle, the power conversion device stops charging the battery pack, which can ensure stable power supply for the outdoor work vehicle.

[0071] New energy power driven garden tools include riding lawn mowers, intelligent lawn mowers, hedge trimmers, and industrial fans. Due to the variety of garden tools, different chargers need to be matched when different garden tools are used, and different chargers need to be used for different garden tools, which easily leads to poor user experience and increases the user's use cost.

[0072] The traditional energy storage device or charger device has a complex ventilation path for heat dissipation. The hot air flow is discharged from the inside of the device to the outside of the device, and needs to pass through multiple ventilation path bends. The kinetic energy of the hot air flow is greatly lost in the multiple bends, the heat dissipation efficiency is low, the heat dissipation effect is not good, and the hot air flow will transfer part of the heat to the side wall of the pipeline when passing through the multiple ventilation paths, and then dissipate to the inside of the energy storage through the side wall, so that a lot of heat is left in the device. The setting of the multiple bend ventilation path also relatively forms a heat preservation layer in the device, which is not conducive to heat dissipation and affects the heat dissipation effect.

[0073] Moreover, the heat dissipation air outlets of each area of the traditional energy storage device or charger device are oppositely arranged, which makes the structure design of the whole device complex and time-consuming and laborious in production and assembly, and is not conducive to mass production.

[0074] Therefore, it is necessary to provide an energy storage bidirectional power supply and a power conversion device to overcome the defects in the prior art.

[0075] In a second aspect, the technical scheme adopted by the present application to solve the problems in the prior art is: an energy storage bidirectional power supply, comprising:

[0076] An inner shell body configured to be detachably assembled to a battery pack, the inner shell body comprising a first air inlet and a first air outlet, a first air flow channel being formed between the battery pack and the inner shell body, a path of the first air flow channel comprising: air flow entering the inner shell body from the first air inlet, entering the battery pack, and being discharged from the battery pack by the first air outlet;

[0077] An outer shell body arranged outside the inner shell body, the outer shell body comprising a second air inlet and a second air outlet, a second air flow channel being formed between the inner shell body and the outer shell body;

[0078] An inverter circuit board configured to be able to convert the electrical energy of the battery pack to discharge externally and / or convert external electrical energy to charge the battery pack, the inverter circuit board being located between the inner shell body and the outer shell body and at least partially located in the second air flow channel, wherein the air flow entering the second air flow channel from the second air inlet passes through the inverter circuit board and is discharged from the outer shell body by the second air outlet;

[0079] Wherein, the air flow discharged from the first air outlet can be discharged from the outer shell body through the second air outlet.

[0080] In some embodiments, the battery pack comprises a battery pack air inlet and a battery pack air outlet, the air flow in the first air flow channel enters the battery pack from the battery pack air inlet, passes through the battery cell in the battery pack, and is discharged from the battery pack by the battery pack air outlet and then discharged from the inner shell body by the first air outlet.

[0081] In some embodiments, the inner housing comprises a first side plate and a second side plate arranged correspondingly, and the first side plate and the second side plate are both provided with a first air outlet, and the first air outlet is provided with a cooling fan for exhausting air outside the inner housing, and the battery pack is located between the two first air outlets.

[0082] In some embodiments, the battery pack is provided with a first terminal, the inner housing is provided with a second terminal, the first terminal and the second terminal are electrically connected when the battery pack is assembled in the inner housing, and the air flow entering the inner housing through the first air inlet passes through the first terminal and the second terminal and is exhausted through the first air outlet.

[0083] In some embodiments, in the assembling direction of the battery pack, the first terminal and the second terminal are located between the first air inlet and the first air outlet.

[0084] In some embodiments, the inner housing is a containing cavity with an opening, and the battery pack is detachably arranged in the containing cavity, and the first air inlet is at least part of the opening.

[0085] In some embodiments, the inner housing and the outer housing are further provided with 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 supply of at least one of the control circuit board and / or inverter circuit board, and the air flow entering the second air flow passage through the second air inlet flows through the control circuit board, output circuit board and inverter circuit board and is exhausted from the outer housing through the second air outlet.

[0086] In some embodiments, the inner housing and the outer housing form a containing space, and the second air flow passage is at least partially located in the containing space, and the containing space comprises:

[0087] a first space arranged on one side of the inner housing, and the control circuit board is located in the first space;

[0088] a second space arranged on the other side of the inner housing corresponding to the first space, and the output circuit board is located in the second space; and

[0089] a third space arranged between the first space and the second space, and the inverter circuit board is located in the third space, and the third space is located between the first space and the second space and below the inner housing.

[0090] The air flow entering the second air flow passage from the second air inlet passes through the control circuit board, the output circuit board and the inverter circuit board in the accommodating space and is discharged from the second air outlet.

[0091] In some embodiments, the outer shell includes a third side plate and a fourth side plate arranged correspondingly, the second air inlet is arranged on the third side plate, the second air outlet is arranged 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.

[0092] In some embodiments, at least one of the second air inlet and the second air outlet is provided with a cooling fan.

[0093] In some embodiments, the battery pack is located above the inverter circuit board.

[0094] In some embodiments, the first air outlet is arranged adjacent to the second air outlet.

[0095] In some embodiments, the inner shell includes a first side plate and a second side plate arranged correspondingly, the first side plate and the second side plate are both provided with the first air outlet, the outer shell includes a third side plate and a fourth side plate arranged correspondingly, the second air inlet is arranged on the third side plate, the second air outlet is arranged on the fourth side plate, and 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 the air outlet direction of the first air outlet.

[0096] In some embodiments, the first air outlet is arranged adjacent to the second air flow passage, and a flow guide member capable of guiding the air flow discharged from the first air outlet to the second air outlet is arranged at the first air outlet.

[0097] In some embodiments, the flow guide member is a tubular structure or a plate structure.

[0098] In some embodiments, a wire harness limiting portion is arranged on the flow guide member, the inner shell 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 member.

[0099] In some embodiments, the inner shell is formed with an accommodating cavity configured to accommodate two first-specification battery packs or one second-specification battery pack.

[0100] In some embodiments, an inverter component is arranged on the inverter circuit board, and the inverter component is located in the second air flow passage.

[0101] The application also provides a bidirectional power storage device, comprising:

[0102] an inner shell configured to detachably accommodate a battery pack, the inner shell comprising a first air inlet and a first air outlet for air flow for cooling, wherein the air flow entering the inner shell through the first air inlet enters the battery pack and is discharged from the battery pack through the first air outlet;

[0103] an outer shell comprising a second air inlet and a second air outlet;

[0104] an inverter module located between the inner shell and the outer shell, the inverter module being configured to convert the electrical energy of the battery pack to external discharge and / or convert external electrical energy to charge the battery pack, wherein the air flow entering the outer shell through the second air inlet flows through the inverter module and is discharged from the outer shell through the second air outlet;

[0105] wherein the air flow discharged from the first air outlet can be discharged from the outer shell through the second air outlet.

[0106] In some embodiments, the first air outlet and the second air outlet are arranged adjacent to each other, and a cooling fan is arranged adjacent to the first air outlet and the second air outlet, the cooling fan being configured to discharge the air flow in the inner shell and between the inner shell and the outer shell from the outer shell through the second air outlet.

[0107] In some embodiments, in the air outlet 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.

[0108] A power conversion device, comprising: an inner shell configured to detachably accommodate a battery pack, the inner shell comprising a first air inlet and a first air outlet, a first air flow channel being formed between the battery pack and the inner shell, the path of the first air flow channel comprising: air flow entering the inner shell through the first air inlet entering the battery pack and being discharged from the battery pack through the first air outlet;

[0109] an outer shell arranged outside the inner shell, the outer shell comprising a second air inlet and a second air outlet, a second air flow channel being formed between the inner shell and the outer shell;

[0110] an inverter circuit board configured to convert the electrical energy of the battery pack to external discharge and / or convert external electrical energy to charge the battery pack, the inverter circuit board being located between the inner shell and the outer shell and at least partially located in the second air flow channel, wherein the air flow entering the second air flow channel through the second air inlet passes through the inverter circuit board and is discharged from the outer shell through the second air outlet;

[0111] The first air outlet is adjacent to the second air outlet, and the airflow discharged from the first air outlet can be discharged from the shell body through the second air outlet.

[0112] Compared with the prior art, the application has the following beneficial effects:

[0113] The energy storage bidirectional power supply comprises a battery compartment and a shell body, an inverter circuit board is arranged between the battery compartment and the shell body, a first air inlet and a first air outlet are formed on the battery compartment for accommodating a battery pack, a first airflow channel is formed between the battery pack and the battery compartment, and the path of the first airflow channel comprises: the airflow entering the battery compartment from the first air inlet enters the battery pack and is discharged from the battery compartment through the first air outlet. A second air inlet and a second air outlet are arranged on the shell body, a second airflow channel is formed between the battery compartment and the shell body, and the airflow entering the second airflow channel from the second air inlet is discharged from the shell body through the second air outlet after passing through the inverter circuit board. The airflow discharged from the first air outlet can be discharged from the shell body through the second air outlet. Such an arrangement enables the second air outlet to discharge the airflow passing through the inverter circuit board and also discharge the airflow discharged from the first air outlet for heat dissipation of the battery pack. The arrangement of the shared heat dissipation air outlets in different regions finally collects the hot airflows in the different regions into one air outlet, so that it is not necessary to arrange separate air outlets for each region requiring heat dissipation, the kinetic energy loss in the movement of the hot airflows is reduced, the device structure is simplified, and the heat dissipation effect is good.

[0114] 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 in the other airflow channel to flow, so that the heat dissipation efficiency is better, the electric energy loss of the heat dissipation fan can be indirectly saved, and the airflow in the region with a lower temperature in the two airflow channels at the convergence position can absorb the temperature of the airflow in the region with a higher temperature, so that the airflow in the region with a higher temperature can be absorbed by the airflow in the region with a lower temperature, and the heat dissipation effect of the region with a higher temperature is better.

[0115] The power conversion device comprises a battery compartment and a shell body, the battery compartment is at least partially accommodated in the shell body, and an inverter module is arranged between the battery compartment and the shell body. The battery compartment detachably mounts a battery pack, and the battery compartment is provided with a first air inlet and a first air outlet for heat dissipation of the battery pack. The airflow entering the battery compartment from the first air inlet enters the battery pack and is discharged from the battery compartment through the first air outlet. The shell body is provided with a second air inlet and a second air outlet, the airflow entering the shell body from the second air inlet flows through the inverter module and is discharged from the shell body through the second air outlet, and the airflow discharged from the first air outlet can be discharged from the shell body through the second air outlet. Such an arrangement enables the second air outlet to discharge the airflow passing through the power conversion circuit board and also discharge the airflow discharged from the first air outlet for heat dissipation of the battery pack.

[0116] In addition, the first air flow channel and the second air flow channel converge at the second air outlet, the two air flow channels can interact to drive the air flow of the other air flow channel, so that the heat dissipation efficiency is better, the power consumption of the heat dissipation fan can be indirectly saved, and the air flow of the high-temperature region can be absorbed by the air flow of the low-temperature region, so that the heat dissipation effect of the high-temperature region is better.

[0117] In use of the power conversion device, especially the power conversion device with the plug-in battery pack, in order to protect the battery pack from being interfered by impurities or stains, a cover is arranged at the battery compartment opening of the power conversion device, however, if the cover is not reasonably designed, the cover cannot affect the taking and placing of the battery pack, and the cover can interfere with other structures when being opened and closed, affecting the user experience.

[0118] Therefore, it is necessary to provide an improved power conversion device to overcome the defects in the prior art.

[0119] In a third aspect, the technical scheme adopted by the present application to solve the problems in the prior art is: a power conversion device, comprising:

[0120] an outer shell body provided with a battery compartment with an opening, the battery compartment being configured to accommodate a battery pack, and an inverter assembly arranged in the outer shell body, the inverter assembly being electrically connectable with the battery pack and being capable of converting the electrical energy of the battery pack to discharge externally or converting the commercial power to charge the battery pack;

[0121] a handle connected with the outer shell body and capable of being extended or retracted along the height direction of the power conversion device;

[0122] a cover hinged with the outer shell body and capable of being pivoted relative to the outer shell body to close or open the opening of the battery compartment;

[0123] the maximum opening angle of the cover is greater than 90° and less than or equal to 150° when the handle is in the retracted state.

[0124] In some embodiments, the height of the hinged position of the cover and the outer shell body is lower than the uppermost position of the handle.

[0125] In some embodiments, the cover is provided with an abutting surface, and the outer shell body is provided with a limiting block, and the abutting surface and the limiting block abut when the cover is in the open position.

[0126] In some embodiments, the maximum opening angle of the cover relative to the horizontal plane is 120°.

[0127] In some embodiments, a hinged assembly is connected to the cover and the outer housing, the hinged assembly comprising a first hinged part arranged on the cover and a second hinged part arranged on the outer housing, a connecting member being arranged between the first hinged part and the second hinged part, and a damping member being arranged on the connecting member and capable of acting between the first hinged part and the second hinged part.

[0128] In some embodiments, the hinged assembly is arranged on both sides of the handle.

[0129] In some embodiments, the hinged assembly is connected to the opening of the battery compartment, and the height of the handle is higher than the height of the opening of the battery compartment.

[0130] In some embodiments, the cover is made of transparent or semi-transparent material.

[0131] In some embodiments, the cover has a light transmittance of greater than or equal to 30% and less than or equal to 99%.

[0132] In some embodiments, a first sensing element is arranged on the cover, and a second sensing element capable of signal sensing with the first sensing element is arranged on the outer housing, the first sensing element being capable of signal sensing with the second sensing element when the cover is in the closed position.

[0133] The first sensing element is disconnected from signal sensing with the second sensing element when the cover is in the open position.

[0134] The present application also provides a power conversion device, comprising:

[0135] An outer housing is provided with a battery compartment having an opening, the battery compartment being configured to accommodate a battery pack, and an inverter assembly is arranged in the outer housing, the inverter assembly being capable of electrical connection with the battery pack and capable of converting the electrical energy of the battery pack to discharge externally or converting external electrical energy to charge the battery pack.

[0136] A handle is connected to the outer housing and capable of extending or retracting in the height direction of the power conversion device.

[0137] A cover is hinged to the edge of the opening of the battery compartment and capable of pivoting relative to the outer housing to close or open the opening of the battery compartment, and the height of the handle is higher than the height of the opening of the battery compartment.

[0138] The cover has a bypass portion.

[0139] When the cover switches between the open position and the closed position, the cover can bypass the handle through the bypass portion.

[0140] In some embodiments, the cover is provided with an abutting surface, and the shell body is provided with a limiting block, and when the cover is in the open position, the abutting surface can abut against the limiting block.

[0141] In some embodiments, a power connector is further arranged on the shell body on the same side as the handle, and when the cover is in the open position, the power connector is located below the end of the cover.

[0142] The application further provides an electric power conversion device, comprising:

[0143] A shell body is provided with a battery compartment with an opening, the battery compartment is configured to accommodate a battery pack, and the shell body is provided with an inverter assembly, which can be electrically connected to the battery pack and can convert the electric energy of the battery pack to discharge externally or convert external electric energy to charge the battery pack.

[0144] A handle is connected to the shell body and can be extended or retracted in the height direction of the electric power conversion device.

[0145] A cover is hinged to the shell body and can be pivoted relative to the shell body to close or open the opening of the battery compartment, and the cover has a bypass portion.

[0146] When the cover is in the closed position or the open position, the handle can be extended and retracted through the bypass portion.

[0147] In some embodiments, the cover is provided with an abutting surface, and the shell body is provided with a limiting block, and when the cover is in the open position, the abutting surface can abut against the limiting block.

[0148] Compared with the prior art, the application has the following beneficial effects:

[0149] The application sets the opening cover angle of the battery compartment to be greater than or equal to 90° and less than or equal to 150°, so that the cover does not interfere with the taking and placing of the battery pack in the battery compartment when it is opened, and the user experience is good.

[0150] Moreover, in order to avoid the obstruction caused by the handle, the application provides a bypass portion on the cover, which can bypass the handle when the cover is opened or closed, so that the cover can be normally opened.

[0151] In addition, in order to open or close the cover within a certain angle range, the application provides an abutting surface on the cover and a limiting block on the shell body, and when the cover is in the open position, the abutting surface abuts against the limiting block.

[0152] When the energy storage structure is applied in different scenarios, it needs to be moved or transported, and the stability of the center of gravity of the energy storage bidirectional power supply is required. Especially when the energy storage structure is a plug-in battery pack, if the overall center of gravity of the energy storage structure is unstable, the center of gravity of the energy storage structure will change when the battery pack is taken out or placed, and the problem of overturning is easy to occur, which may cause the energy storage structure to be damaged.

[0153] Therefore, it is necessary to provide an improved energy storage bidirectional power supply and power conversion device to overcome the defects in the prior art.

[0154] In a fourth aspect, the technical scheme adopted by the present application to solve the problems in the prior art is: an energy storage bidirectional power supply, comprising:

[0155] a battery pack;

[0156] an inverter device, the battery pack being detachably mounted on the inverter device, the inverter device being capable of converting external alternating current to charge the battery pack or converting the electrical energy of the battery pack to supply power to the outside, the inverter device comprising two handles;

[0157] The inverter device allows the installation of two battery packs of a first specification or one battery pack of a second specification, and the center of gravity of the energy storage bidirectional power supply when two battery packs of the first specification are installed and the center of gravity when one battery pack of the second specification is installed are both located on the symmetry plane of the two handles.

[0158] In some embodiments, the inverter device has a center plane in the up-down direction, the vertical distance from the center plane to the uppermost end of the inverter device is equal to the vertical distance from the center plane to the lowermost end of the inverter device, and the bottom plate of the battery compartment is configured to support the battery pack, the bottom plate being located below the center plane.

[0159] In some embodiments, the inverter device further comprises a battery compartment for mounting the battery pack, and the height of the center of gravity of the energy storage bidirectional power supply is below the center plane in both the state without mounting the battery pack and the state with mounting the battery pack.

[0160] In some embodiments, the inverter device further comprises a battery compartment for mounting the battery pack, and the two corresponding side plates of the battery compartment are each provided with an electrical connection terminal capable of being electrically connected with the battery pack of the first specification and the battery pack of the second specification, and the electrical connection terminals on the two side plates are approximately symmetrically distributed with respect to the symmetry plane of the two handles.

[0161] In some embodiments, the second specification battery pack is provided with two output terminals, one of which is electrically connected with one of the electrical connection terminals on the two side plates, and the other of which is electrically connected with the other of the electrical connection terminals on the two side plates.

[0162] In some embodiments, the two power connection terminals are symmetrically distributed with respect to the symmetry plane of the two handles.

[0163] In some embodiments, the inverter device comprises an inverter circuit board, which is located below the battery pack when the inverter device is installed on the battery pack.

[0164] In some embodiments, the inverter device is provided with a plurality of walking wheels capable of supporting the inverter device to walk.

[0165] The application also provides a power storage bidirectional power supply, comprising:

[0166] a battery pack;

[0167] an inverter device, the battery pack being detachably installed on the inverter device, the inverter device being capable of converting external alternating current to charge the battery pack or converting the electric energy of the battery pack to supply external power, the inverter device comprising two handles;

[0168] The inverter device allows installation of two battery packs of a first specification or one battery pack of a second specification, and the center of gravity of the power storage bidirectional power supply when installing two battery packs of the first specification and the center of gravity of the power storage bidirectional power supply when installing one battery pack of the second specification are both located on the symmetry plane of the two handles,

[0169] wherein the battery pack can be detached from the inverter device to supply power to other tools.

[0170] In some embodiments, the inverter device further comprises a battery compartment for installing the battery pack, and each of the two corresponding side plates of the battery compartment is provided with a power connection terminal capable of electrically connecting with the battery pack of the first specification and the battery pack of the second specification, and the power connection terminals on the two side plates are symmetrically distributed with respect to the symmetry plane of the two handles.

[0171] In some embodiments, the inverter device comprises an inverter circuit board, which is located below the battery pack when the inverter device is installed on the battery pack.

[0172] The application also provides a power conversion device configured to be capable of electrically connecting with a battery pack, comprising:

[0173] an inverter assembly, the battery pack being detachably installed on the inverter device, the inverter assembly being capable of converting external alternating current to charge the battery pack or converting the electric energy of the battery pack to supply external power, the power conversion device comprising two handles;

[0174] The power conversion device allows installation of two battery packs of a first specification or one battery pack of a second specification, and the center of gravity of the power conversion device when the two battery packs of the first specification are installed and the center of gravity of the power conversion device when the one battery pack of the second specification is installed are both located on the symmetry plane of the two handles,

[0175] The power conversion device has a center plane in the up-down direction, the vertical distance from the center plane to the uppermost end of the inverter device is equal to the vertical distance from the center plane to the lowermost end of the inverter device, and the bottom plate of the battery compartment is configured to support the battery pack and is located below the center plane.

[0176] Compared with the prior art, the present application has the following beneficial effects:

[0177] The inverter device of the energy storage bidirectional power supply allows installation of two battery packs of a first specification or one battery pack of a second specification, and the center of gravity of the energy storage bidirectional power supply when the two battery packs of the first specification are installed and the center of gravity of the energy storage bidirectional power supply when the one battery pack of the second specification is installed are both located on the symmetry plane of the two handles, so that the center of gravity of the energy storage bidirectional power supply before and after installation of the battery pack is relatively concentrated, and the energy storage bidirectional power supply will not tip over during daily use and when the battery pack is taken out or placed.

[0178] The power conversion device of the present application, due to the heavy weight of the battery pack, the bottom plate of the battery compartment supporting the battery pack is arranged below the center plane of the power conversion device in the up-down direction, which makes the center of gravity of the power conversion device lower and more stable.

[0179] In the power conversion device, in order to realize its multifunctionalization, a plurality of output interfaces and input interfaces are arranged on the power conversion device to output power to the outside (such as garden tool charging output port, AC output port, USB output port, cigarette lighter output port, etc.) and input (such as AC power input port, solar input port, charging pile input port), since each port needs to be connected to different circuit boards inside the device according to its different attributes, if these output ports, input ports and circuit boards cannot be reasonably arranged, the whole device structure design will be chaotic, and users cannot better distinguish the functional attributes of each port, which easily leads to poor user experience.

[0180] Therefore, it is necessary to provide an improved power conversion device to overcome the defects in the prior art.

[0181] In a fifth aspect, the technical scheme adopted by the present application to solve the problems in the prior art is: a power conversion device, comprising:

[0182] A housing body;

[0183] A battery compartment at least partially accommodated in the housing body, the battery compartment being capable of accommodating a battery pack;

[0184] a first functional area disposed on one side of the battery pack, the first functional area being provided with at least a display panel capable of displaying state information of the power conversion device;

[0185] a second functional area disposed on the other side of the battery pack relative to the first functional area, the second functional area being provided with at least an external power port capable of being electrically connected with an external power source;

[0186] an electric energy conversion area disposed between the first functional area and the second functional area and below the battery pack, the electric energy conversion area being provided with an electric energy conversion circuit board capable of receiving electric energy transmitted by the external power port and converting the electric energy for charging the battery pack or converting electric energy of the battery pack and outputting the electric energy externally.

[0187] In some embodiments, the first functional area is provided with a direct current output circuit board and an alternating current output circuit board, the direct current output circuit board being provided with a direct current output port, the display panel being electrically connected with the direct current output port, and the alternating current output circuit board being provided with an alternating current output port.

[0188] In some embodiments, the second functional area is provided with a control circuit board capable of controlling operation of the electric energy conversion circuit board and capable of obtaining electric energy converted by the electric energy conversion circuit board.

[0189] In some embodiments, the direct current output circuit board is electrically connected with the control circuit board and capable of transmitting electric energy of the control circuit board to the direct current output port;

[0190] the alternating current output circuit board is electrically connected with the electric energy conversion circuit board and capable of transmitting electric energy of the electric energy conversion circuit board to the alternating current output port.

[0191] In some embodiments, a containing space is formed between the outer shell and the inner shell, the first functional area, the second functional area and the electric energy conversion area being located in the containing space, and the outer shell is further provided with a heat dissipation air outlet capable of dissipating heat of the containing space.

[0192] In some embodiments, the second functional area is further provided with an external output port capable of charging an outdoor working vehicle, the external output port being electrically connected with the electric energy conversion circuit board.

[0193] In some embodiments, the shell is further provided with a handle for moving the power conversion device, the handle being disposed close to the second functional area.

[0194] In some embodiments, the battery compartment comprises a fifth side plate and a sixth side plate arranged oppositely, the outer shell comprises a seventh side plate and an eighth side plate arranged correspondingly, the first functional area is located at the fifth side plate and the seventh side plate, and the second functional area is located at the sixth side plate and the eighth side plate.

[0195] The application also provides a power conversion device, comprising:

[0196] a shell;

[0197] an output circuit board assembly arranged on one side of the shell, the output circuit board assembly being connected with an output port capable of being connected with an external power-consuming device;

[0198] a control circuit board arranged on the other side of the shell relative to the output circuit board assembly;

[0199] an inverter circuit board arranged between the output circuit board assembly and the control circuit board, the inverter circuit board being capable of converting external electric energy and supplying power to the control circuit board.

[0200] In some embodiments, the output circuit board assembly comprises a direct-current output circuit board and an alternating-current output circuit board, the direct-current output circuit board being electrically connected with the control circuit board, and the alternating-current output circuit board being electrically connected with the inverter circuit board.

[0201] In some embodiments, a handle for moving the power conversion device is further arranged on the outer shell, the handle being arranged close to the control circuit board.

[0202] In some embodiments, an external output port capable of charging an outdoor working vehicle is further arranged on the outer shell and on the same side of the control circuit board, the external output port being electrically connected with the inverter circuit board.

[0203] Compared with the prior art, the application has the following beneficial effects:

[0204] The application sets ports with different functional attributes in different functional areas on the power conversion device, specifically, sets the main external output port at the front end face (the first functional area) of the power conversion device, sets the external power supply port for connecting the external power supply at the rear end face (the second functional area) of the device, and sets the external output circuit board in the front part of the device, so that the output port and the input port of the power conversion device are arranged in different areas, the power conversion device can supply power to multiple devices and display real-time information, and the practicability and user experience of the device are improved.

[0205] The AC and DC power supply can be simultaneously realized; the charging and discharging information can be displayed in real time, and the charging and discharging conditions can be mastered in real time; the safety can be improved by avoiding misoperation in a low illumination environment.

[0206] The outdoor energy storage device is heavy, and walking wheels are installed on the outdoor energy storage device to facilitate movement. However, the walking wheels of the existing outdoor energy storage device are still supported on the ground when the outdoor energy storage device is placed. Due to the presence of batteries in the outdoor energy storage device, the overall weight is heavy, and the walking wheels are easily damaged if they are supported on the ground for a long time, thereby shortening the service life of the walking wheels.

[0207] Therefore, it is necessary to provide an improved energy storage bidirectional power supply to overcome the defects of the prior art.

[0208] In a sixth aspect, the technical scheme adopted by the present application to solve the problems in the prior art is: an energy storage bidirectional power supply, comprising:

[0209] An outer shell;

[0210] An electric core located in the outer shell;

[0211] An inverter module arranged in the outer shell, the inverter module being capable of converting the electric energy of the electric core and supplying power to the outside or converting the electric energy from the outside and charging the electric core;

[0212] A walking wheel arranged in the outer shell, the walking wheel being configured to support the energy storage bidirectional power supply to walk;

[0213] A handle connected to the outer shell, when the handle is pulled, the energy storage bidirectional power supply can move on the ground in an inclined manner through the walking wheel;

[0214] A support connected to the bottom of the outer shell, when the energy storage bidirectional power supply is placed horizontally on the ground, the support supports the entire energy storage bidirectional power supply on the ground, and the walking wheel does not contact the ground.

[0215] In some embodiments, when the energy storage bidirectional power supply is placed horizontally on the ground, the lowest end of the walking wheel is higher than the lowest end of the support.

[0216] In some embodiments, the bottom of the outer shell is provided with a limiting portion capable of limiting the movement of the support, and the support is at least partially located in the limiting portion.

[0217] In some embodiments, an auxiliary support is further arranged at the bottom of the outer shell, and the auxiliary support is at least partially located between the walking wheel and the support in a direction perpendicular to the axis of the walking wheel.

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

[0219] In some embodiments, the projection of the auxiliary support and the projection of the walking wheel at least partially overlap in the direction perpendicular to the axis of the walking wheel.

[0220] In some embodiments, the outer shell comprises a bottom plate and a side plate arranged around the bottom plate, and the walking wheel is located at the junction of the bottom plate and the side plate.

[0221] In some embodiments, the walking wheel is provided with two, and the two walking wheels are respectively located on both sides of the handle.

[0222] In some embodiments, the support is provided with a plurality of, and the plurality of supports are arranged at the edge of the bottom of the outer shell.

[0223] The energy storage bidirectional power supply is also provided, comprising:

[0224] An outer shell;

[0225] A battery compartment, at least partially located in the outer shell, the battery compartment is configured to detachably assemble a battery pack;

[0226] An inverter module, arranged in the accommodation space between the outer shell and the battery compartment, the inverter module can at least convert external electric energy and charge the battery pack;

[0227] A walking wheel, arranged in the outer shell, the walking wheel is configured to support the energy storage bidirectional power supply to walk;

[0228] A handle connected to the outer shell, when the handle is pulled, the energy storage bidirectional power supply can move on the ground in an inclined manner through the walking wheel;

[0229] A support connected to the bottom of the outer shell, when the energy storage bidirectional power supply is horizontally placed on the ground, the support supports the energy storage bidirectional power supply on the ground and the walking wheel is not in contact with the ground.

[0230] In some embodiments, when the energy storage bidirectional power supply is horizontally placed on the ground, the distance between the walking wheel and the ground is greater than or equal to 5mm and less than or equal to 45mm.

[0231] In some embodiments, a first water leakage hole is arranged on the battery compartment, a second water leakage hole is arranged on the outer shell, and a flow guide pipe is connected between the first water leakage hole and the second water leakage hole.

[0232] The energy storage bidirectional power supply comprises:

[0233] An outer shell;

[0234] A battery compartment located at least partially in the outer shell, the battery compartment being configured to detachably assemble a battery pack;

[0235] An inverter module arranged in the accommodating space between the outer shell and the battery compartment, the inverter module being capable of at least converting external electric energy and charging the battery pack;

[0236] A walking wheel arranged in the outer shell, the walking wheel being configured to support the energy storage bidirectional power supply to move on the ground in an inclined manner;

[0237] A support connected to the bottom of the outer shell, when the energy storage bidirectional power supply is horizontally placed on the ground, the support supports the energy storage bidirectional power supply on the ground and the walking wheel is not in contact with the ground.

[0238] Compared with the prior art, the energy storage bidirectional power supply has the following beneficial effects:

[0239] The energy storage bidirectional power supply can move on the ground with the support of the walking wheel when the user pulls the handle. When placed horizontally, the entire energy storage bidirectional power supply is supported by the support, and the walking wheel is lifted off the ground. This arrangement can reduce the load pressure on the walking wheel and prolong the service life of the walking wheel.

[0240] Outdoor energy storage devices are heavy, and walking wheels are installed on the bottom plate of the outer shell of the outdoor energy storage device to facilitate movement. In particular, when moving, the weight of the entire energy storage device is concentrated on the walking wheel, and the walking wheel bears a large amount of weight pressure. Therefore, at the beginning of the design, the researchers will thicken the connection between the walking wheel and the bottom plate of the outer shell. The thickened part extends to the inside of the outer shell to improve the appearance of the outside. This will occupy part of the internal space of the outer shell. Since other components such as the inverter module need to be installed inside the outer shell, if the required installation components inside the outer shell are directly arranged on the thickened part, it will lead to unstable installation, especially when moving, which will affect the normal use of the entire device over time. Therefore, in the case of installing components inside and outside the bottom plate of the outer shell, the positional relationship between the walking wheel and the inverter module needs to be reasonably designed to prevent the bottom plate of the outer shell from meeting the internal installation requirements while failing to meet the strength requirements of the external walking wheel installation.

[0241] Therefore, it is necessary to provide an improved power conversion device to overcome the shortcomings of the prior art.

[0242] In a seventh aspect, the present application provides an electric power conversion device, comprising:

[0243] a housing body;

[0244] a battery compartment at least partially located in the housing body, the battery compartment being configured to detachably assemble a battery pack;

[0245] an inverter module located in a receiving space between the housing body and the battery compartment, the inverter module being capable of at least converting external electric energy and charging the battery pack;

[0246] a plurality of walking wheel assemblies configured to support the electric power conversion device to walk on the ground, each of the walking wheel assemblies comprising a walking wheel and a walking support for mounting the walking wheel, the walking support comprising a support connecting portion capable of being connected to a bottom plate of the housing body;

[0247] wherein, in a horizontal direction parallel to the bottom plate of the housing body, the inverter module is located between a plurality of the support connecting portions.

[0248] In some embodiments, the bottom plate of the housing body is provided with a bottom plate connecting portion that is detachably coupled with the support connecting portion.

[0249] In some embodiments, the support connecting portion is a protrusion or a groove, and the bottom plate connecting portion is a groove or a protrusion that is detachably coupled with the support connecting portion.

[0250] In some embodiments, a recess is provided along a circumferential direction of the protrusion, and a semicircular snap ring is provided around the recess, the semicircular snap ring being at least partially located outside the recess.

[0251] In some embodiments, an aperture of the groove extends in a vertical direction of the electric power conversion device and gradually increases from top to bottom.

[0252] The present application also provides an electric power conversion device, comprising:

[0253] a housing body;

[0254] a battery compartment at least partially located in the housing body, the battery compartment being configured to detachably assemble a battery pack;

[0255] an inverter module located in a receiving space between the housing body and the battery compartment, the inverter module being capable of at least converting external electric energy and charging the battery pack;

[0256] A plurality of walking mechanisms configured to support the power conversion device to walk on the ground, each of the walking mechanisms comprising a walking connecting portion for connecting with a bottom plate of the outer shell;

[0257] The inverter module is located between the plurality of walking connecting portions in a horizontal direction parallel to the bottom plate of the outer shell.

[0258] In some embodiments, at least a ventilation opening for dissipating heat from the inverter module is arranged on a side plate of the outer shell, and the ventilation opening is located outside the walking mechanism in the horizontal direction parallel to the bottom plate of the outer shell.

[0259] In some embodiments, heat dissipation fans are arranged at two ends of the inverter module, and the outlets of the heat dissipation fans at least partially overlap with the ventilation opening on the outer shell in the outlet direction of the heat dissipation fans.

[0260] In some embodiments, a bottom plate connecting portion is arranged on the bottom plate of the outer shell and is mounted in cooperation with the walking connecting portion.

[0261] The application also provides a bidirectional energy storage power supply, comprising:

[0262] An outer shell;

[0263] A battery compartment at least partially located in the outer shell, the battery compartment being configured to detachably assemble a battery pack;

[0264] An inverter module arranged in a containing space between the outer shell and the battery compartment, the inverter module being capable of at least converting external electric energy and charging the battery pack;

[0265] A control module arranged in the containing space between the outer shell and the battery compartment, the control module being used at least for controlling operation of the inverter module, and the control module being located above the inverter module in the up-down direction of the bidirectional energy storage power supply;

[0266] A plurality of walking mechanisms configured to support the bidirectional energy storage power supply to walk on the ground, each of the walking mechanisms comprising a walking connecting portion for connecting with a bottom plate of the outer shell;

[0267] The inverter module is located between the plurality of walking connecting portions in a horizontal direction parallel to the bottom plate of the outer shell.

[0268] In some embodiments, a bottom plate connecting portion is arranged on the bottom plate of the outer shell and is mounted in cooperation with the walking connecting portion.

[0269] In some embodiments, at least a ventilation opening for dissipating heat from the inverter module is arranged on the side plate of the outer shell, and the ventilation opening can exchange heat with the airflow outside the energy storage bidirectional power supply.

[0270] Compared with the prior art, the present application has the following beneficial effects:

[0271] The power conversion device of the present application is arranged between the plurality of support connecting portions in the horizontal direction parallel to the bottom plate of the outer shell. Such arrangement helps to reserve a position for connecting the support connecting portions on the bottom plate of the outer shell, so as to prevent the inverter module on the other side of the bottom plate from interfering with the installation of the walking wheel assembly.

[0272] The energy storage bidirectional power supply of the present application is arranged between the plurality of walking connecting portions in the horizontal direction parallel to the bottom plate of the outer shell. Such arrangement helps to reserve a position for connecting the walking support connecting portions on the bottom plate of the outer shell, so as to prevent the inverter module on the other side of the bottom plate from interfering with the installation of the walking wheel assembly.

[0273] The outdoor energy storage device needs to convert electrical energy to output electrical energy to the outside or to the inside, and the conversion of electrical energy generates a large amount of heat. Therefore, a heat dissipation opening is often provided on the outdoor energy storage device to exchange heat with the external environment. However, when used outdoors, impurities or flying insects can enter the interior of the device through the heat dissipation opening, which can easily damage the internal components and affect normal use.

[0274] Therefore, it is necessary to provide an improved power conversion device and energy storage bidirectional power supply to overcome the defects of the prior art.

[0275] In the eighth aspect, the technical scheme adopted by the present application to solve the problems of the prior art is: a power conversion device, comprising:

[0276] a shell;

[0277] a battery pack, which is detachably mounted on the shell;

[0278] an inverter module, which can convert the electrical energy of the battery pack to discharge to the outside or convert the electrical energy of the outside to charge the battery pack;

[0279] a heat dissipation opening is arranged on the shell, and a protective net assembly capable of covering the heat dissipation opening is arranged at the heat dissipation opening. The protective net assembly comprises a first protective net and a second protective net with different mesh sizes.

[0280] In some embodiments, the first protective net is located outside the second protective net, and the mesh size of the first protective net is larger than that of the second protective net.

[0281] In some embodiments, the first protective net and the second protective net are connected by adhesion.

[0282] In some embodiments, a sliding groove is arranged on the outer shell, and the first protective net is inserted into the sliding groove.

[0283] In some embodiments, the first protective net and the second protective net are connected by magnetic attraction.

[0284] In some embodiments, the size of the mesh of the first protective net is greater than or equal to 2 mm and less than or equal to 3 mm.

[0285] In some embodiments, the shell is provided with the heat dissipation air vents on both sides, each of the heat dissipation air vents is provided with the protective net assembly, and the inverter module is located between the corresponding heat dissipation air vents.

[0286] In some embodiments, the shell is provided with a containing portion capable of containing the protective net assembly, and the containing portion is formed by inwardly recessing the outer surface of the shell.

[0287] In some embodiments, the heat dissipation air vent is arranged in the containing portion, and the containing portion is formed with a third protective net.

[0288] In some embodiments, the first protective net is a grid structure, and the second protective net is a honeycomb net structure.

[0289] The application also provides an electric power conversion device, comprising:

[0290] a shell;

[0291] a battery pack, which is detachably mounted on the shell;

[0292] an inverter module, which is capable of converting the electric energy of the battery pack to discharge externally or converting the external electric energy to charge the battery pack;

[0293] The shell is provided with a heat dissipation air vent, the heat dissipation air vent is provided with a protective net assembly capable of covering the heat dissipation air vent, the protective net assembly comprises a first protective net and a second protective net with different mesh sizes;

[0294] a moving assembly configured to support the movement of the entire electric power conversion device.

[0295] The application also provides an energy storage bidirectional power supply, comprising:

[0296] a shell;

[0297] a plurality of battery cells arranged in the shell;

[0298] An inverter module capable of converting the electrical energy of the plurality of battery cells to discharge externally or charging the plurality of battery cells with external electrical energy after conversion;

[0299] The shell is provided with symmetrically arranged heat dissipation air inlets, and the heat dissipation air inlets are provided with protective screen assemblies capable of covering the heat dissipation air inlets, the protective screen assemblies comprising first protective screens and second protective screens with different mesh sizes.

[0300] Compared with the prior art, the application has the following beneficial effects:

[0301] By arranging two layers of protective screens with different mesh sizes, foreign matters can be effectively reduced from entering the shell, the components in the shell are protected, and the service life is prolonged. [SUMMARY]

[0302] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings:

[0303] Fig. 1 is a perspective structural schematic view of an energy storage bidirectional power supply (power conversion device) according to an embodiment of the application;

[0304] Fig. 2 is a perspective structural schematic view of the energy storage bidirectional power supply (power conversion device) according to an embodiment of the application from another angle;

[0305] Fig. 3 is a structural schematic view of the energy storage bidirectional power supply (power conversion device) according to the application after removing the cover;

[0306] Fig. 4 is a top view structural schematic view of the energy storage bidirectional power supply (power conversion device) according to the application;

[0307] Fig. 5 is a sectional view structural schematic view of the A-A plane in Fig. 4;

[0308] Fig. 6 is a right view structural schematic view of the energy storage bidirectional power supply (power conversion device) according to the application;

[0309] Fig. 7 is a sectional view structural schematic view of the B-B plane in Fig. 6;

[0310] Fig. 8 is a sectional view structural schematic view of the energy storage bidirectional power supply (power conversion device) according to the application;

[0311] Fig. 9 is an internal partial structural schematic view of the energy storage bidirectional power supply (power conversion device) according to the application;

[0312] Fig. 10 is a structural schematic view of the locking structure, flow guide and first heat dissipation fan of the energy storage bidirectional power supply (power conversion device) according to the application;

[0313] Fig. 11 is a mounting structural schematic view of the protective screen assembly of the energy storage bidirectional power supply (power conversion device) according to the application;

[0314] Figure 12 is a structural diagram of the protective net assembly and the shell with a slot of the energy storage bidirectional power supply (power conversion device) of the present application;

[0315] Figure 13 is a front structural diagram of the energy storage bidirectional power supply (power conversion device) of the present application;

[0316] Figure 14 is an enlarged view of part A in Figure 12;

[0317] Figure 15 is a perspective view of the display bottom structure of the energy storage bidirectional power supply (power conversion device) of the present application;

[0318] Figure 16 is a perspective view of the display bottom structure of the energy storage bidirectional power supply (power conversion device) of the present application from another angle;

[0319] Figure 17 is an enlarged view of part B in Figure 15;

[0320] Figure 18 is a structural diagram of the hinge assembly of the energy storage bidirectional power supply (power conversion device) of the present application;

[0321] Figure 19 is a structural diagram of the energy conversion circuit board (inverter circuit board) of the energy storage bidirectional power supply (power conversion device) of the present application located between the walking wheels;

[0322] Figure 20 is a perspective view of the display bottom structure of the energy storage bidirectional power supply (power conversion device) of the present application from another angle;

[0323] Figure 21 is a structural diagram of the walking wheel of the present application;

[0324] Figure 22 is a structural diagram of the energy storage bidirectional power supply (power conversion device) of the present application with the cover opened;

[0325] Figure 23 is a structural diagram of the energy storage bidirectional power supply (power conversion device) of the present application with the pull rod extended;

[0326] Figure 24 is a structural diagram of the energy storage bidirectional power supply (power conversion device) of the present application with the pull rod extended from another angle;

[0327] Figure 25 is a structural diagram of the energy storage bidirectional power supply (power conversion device) of the present application with one second-specification battery pack installed;

[0328] Figure 26 is a structural diagram of the energy storage bidirectional power supply (power conversion device) of the present application with two first-specification battery packs installed;

[0329] Figure 27 is a force analysis diagram of the energy storage bidirectional power supply of the present application in an inclined moving state;

[0330] Figure 28 is a force analysis diagram of the energy storage bidirectional power supply of the present application from an inclined state to a horizontal state;

[0331] Figure 29 is a logical block diagram of the connection relationship of the ports of the present application. [DETAILED DESCRIPTION]

[0332] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0333] Please refer to Figures 1 to 27, which show the energy storage bidirectional power supply disclosed in the present application, including a battery pack 300, a battery compartment 100, an outer shell 200 and an electric energy conversion circuit board 231.

[0334] As shown in Figures 1 to 3, 5, 7 to 9, the battery compartment 100 is configured to accommodate the battery pack 300, and the battery compartment 100 is provided with a first ventilation opening capable of exchanging heat between the inside and outside of the battery compartment 100. The battery compartment 100 is at least partially accommodated in the outer shell 200, and the outer shell 200 is provided with a second ventilation opening capable of exchanging heat between the inside and outside of the outer shell 200. The electric energy conversion circuit board 231 is configured in the accommodation space formed by the battery compartment 100 and the outer shell 200, and the electric energy conversion circuit board 231 is configured to at least convert the electric energy of the battery pack 300 and output it externally. In the ventilation direction of the second ventilation opening, the projection of the first ventilation opening at least partially overlaps the projection of the second ventilation opening. In the present application, by setting the first ventilation opening for dissipating heat from the battery pack 300 and the second ventilation opening for dissipating heat from the electric energy conversion circuit board 231 in the accommodation space to at least partially overlap in the ventilation direction of the second ventilation opening, such a setting facilitates the battery pack 300 in the battery compartment 100 inside the outer shell 200 to dissipate heat through the first ventilation opening and then through the second ventilation opening on the outer shell 200 to exhaust heat with the airflow, and the second ventilation opening also dissipates heat from the electric energy conversion circuit board 231, so that the heat generated by the battery pack 300 and the heat generated by the electric energy conversion circuit board 231 can both be exhausted outside the energy storage bidirectional power supply through the second ventilation opening.

[0335] Please refer to FIGS. 4-9, in some embodiments, the battery pack 300 comprises a battery shell and a battery cell 301 arranged in the battery shell, the shell of the battery pack 300 is provided with a third air vent for heat dissipation of the battery cell 301 inside, and the projection of the third air vent at least partially overlaps the projection of the second air vent in the ventilation direction of the second air vent. In this way, the heat generated by the battery cell 301 in the battery shell can be discharged in the form of a hot air flow through the third air vent and into the battery compartment 100 along a straight path, and then discharged along a straight path through the first air vent into the outer shell 200, and then discharged along a straight path through the second air vent out of the outer shell 200. In the ventilation direction of the second air vent, the projection of the third air vent at least partially overlaps the projection of the first air vent, in combination with the above-mentioned at least partial overlap of the projections of the first and second air vents. This arrangement helps to directly discharge the heat in the battery pack 300. Compared with the prior art arrangement of multiple curved ventilation paths, my scheme directly discharges the hot air flow by arranging the ventilation directions of multiple air vents in a straight path, which helps to quickly discharge the heat in the battery pack 300, and thus quickly cools the battery pack 300 and the power conversion circuit board 231.

[0336] Please refer to FIGS. 4-10, further, the battery shell is also provided with an air inlet for air flow into the battery pack 300. In order to improve the heat dissipation efficiency of the battery pack 300 and accelerate the discharge of heat inside the battery pack 300, in some embodiments, the first air vent is provided with a first heat dissipation fan 113 for heat dissipation inside the battery pack 300, and the projection of the first heat dissipation fan 113 at least partially overlaps the projection of the second air vent in the ventilation direction of the second air vent. By directly blowing the second air vent with the first heat dissipation fan 113, the heat in the battery compartment 100 can be quickly discharged through the second air vent, and the rotation of the first heat dissipation fan 113 can speed up the flow of air (the fan creates a local pressure difference by rotating blades, converts mechanical energy into air kinetic energy, and forces air to flow in a certain direction.), improving the heat dissipation efficiency of the battery pack 300. Specifically, the first heat dissipation fan 113 is arranged outside the battery compartment 100, of course, the first heat dissipation fan 113 can also be arranged inside the battery compartment 100.

[0337] Please refer to FIGS. 7-9, in some embodiments, the second heat dissipation fan 201 is arranged in the accommodating space for dissipating heat of the electric energy conversion circuit board 231, and the projection of the second heat dissipation fan 201 at least partially overlaps the projection of the second vent in the ventilation direction of the second vent. With such an arrangement, the heat generated by the electric energy conversion circuit board 231 can be quickly discharged in the form of hot air along a straight path and through the second vent by the second heat dissipation fan 201.

[0338] In some embodiments, a first heat dissipation fan 113 is arranged at each of the first vents at both ends of the battery compartment 100, both of the first heat dissipation fans 113 discharge air outward, and two second heat dissipation fans 201 are arranged at each of the two ends of the electric energy conversion circuit board 231, the two second heat dissipation fans 201 at one end of the electric energy conversion circuit board 231 blow air to the electric energy conversion circuit board, and the two second heat dissipation fans 201 at the other end discharge air outward.

[0339] In some embodiments, the rotation speed of the second heat dissipation fan 201 is greater than the rotation speed of the first heat dissipation fan 113, by increasing the rotation speed of the second heat dissipation fan 201, the speed of the airflow generated by the second heat dissipation fan 201 is increased, thereby having a better heat dissipation effect on the electric energy conversion circuit board 231 which generates more heat.

[0340] It should be noted that the description of at least partial overlap between the projections of the two components in the present application includes both partial overlap and complete overlap.

[0341] Please refer to FIGS. 4-9, in some embodiments, the projection of the electric energy conversion circuit board 231 at least partially overlaps the projection of the second vent in the ventilation direction of the second vent, in combination with the above-mentioned at least partial overlap between the projection of the second heat dissipation fan 201 and the projection of the second vent in the ventilation direction of the second vent. In this way, by arranging the electric energy conversion circuit board 231, the second heat dissipation fan 201, and the second vent in a straight line or approximately in a straight line, the heat generated by the electric energy conversion circuit board 231 is discharged outward along a straight path, thereby improving the heat dissipation efficiency of the electric energy conversion circuit board 231.

[0342] It should be noted that in the present application, the electric energy conversion circuit board includes a circuit board body and a plurality of components arranged on the circuit board body, and the above-mentioned at least partial overlap between the projection of the electric energy conversion circuit board 231 and the projection of the second vent includes at least partial overlap between the projections of the plurality of components on the circuit board body and the second vent.

[0343] Please refer to FIG. 4 to FIG. 10, it is to be noted that the battery compartment 100 of the present application is a battery compartment 100 with an opening, the battery compartment 100 is used for installing the battery pack 300, the battery pack 300 is detachably inserted into the battery compartment 100, the outer shell 200 is an outer shell 200 with an opening capable of at least partially accommodating the battery compartment 100, and the battery compartment 100 is assembled in the outer shell 200 through the opening of the outer shell 200. After the battery compartment 100 and the outer shell 200 are assembled, an accommodation space is formed between the two. Further, the accommodation space includes a first space, a second space and a third space, the first space is arranged at one side of the battery compartment 100, and the first space is provided with a first circuit board. The second space is arranged at the other side of the battery compartment 100 opposite to the first space, and the second space is provided with a second circuit board. The third space is arranged 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 exchange heat with external gas through the second ventilation port. By dividing the accommodation space into three space regions, each space region is provided with a circuit board, and the second ventilation port is used to dissipate heat of the respective circuits in the three regions, which not only satisfies the reasonable layout of the circuit boards and the mutual non-interference between the circuit boards, but also takes into account the heat dissipation design of each circuit board. In some embodiments, the first space, the second space and the third space are in communication with each other. Specifically, the first space and the second space are located at two sides of the battery pack 300, and the third space is located below the battery pack 300.

[0344] Please refer to FIG. 4 to FIG. 10, further, 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 can further include a direct current circuit board provided with a direct current output port, the direct current output port can supply power to an outdoor direct current electrical appliance, and the first circuit board can further include an alternating current circuit board provided with an alternating current output port 210, the alternating current output port 210 can supply power to an external alternating current electrical appliance.

[0345] The functions of the power conversion circuit board 231 include converting external power into charging power of the battery pack 300 and / or converting power of the battery pack 300 and outputting the power to the outside through the alternating current output port 210 of the alternating current circuit board or the direct current output port of the direct current circuit board. The functions of the control circuit board 227 include controlling the operation of the power conversion circuit board 231, receiving power supply of the power conversion circuit board 231, and transmitting power of the power conversion circuit board 231 to the direct current output circuit board, and the direct current output circuit board discharges power to the outside through the direct current output port thereon, and the direct current output port can supply power to an outdoor direct current electrical appliance.

[0346] Please refer to FIG. 4 to FIG. 10, the application further provides a power conversion device, comprising a housing 200, a battery compartment 100 and an inverter module. The battery compartment 100 is at least partially accommodated in the housing 200, and the battery compartment 100 can accommodate a battery pack 300, which can be detached from the power conversion device to power the electric tool, so as to expand the application field of the battery pack 300. The inverter module is arranged in the accommodating space formed by the battery compartment 100 and the housing 200. Among them, the first vent is arranged on the battery compartment 100 for heat dissipation of the battery pack 300, and the second vent is arranged on the housing for heat dissipation of the accommodating space. In the ventilation direction of the second vent, the projection of the first vent at least partially overlaps the projection of the second vent. Such arrangement facilitates the battery pack 300 in the battery compartment 100 inside the housing 200 to discharge heat in a straight path through the first vent and then through the second vent on the housing 200, and the second vent also considers the heat dissipation of the inverter module, so that the heat generated by the battery pack 300 and the heat generated by the inverter module can be discharged outside the power conversion device through the second vent.

[0347] Please refer to FIG. 4 to FIG. 10, in some embodiments, the battery compartment 100 comprises a first side plate 105 and a second side plate 106 arranged correspondingly, and the first side plate 105 and the second side plate 106 are both provided with the first vent. By arranging the first vent on the first side plate 105 and the second side plate 106 arranged correspondingly on the battery compartment 100 respectively, the heat exchange efficiency between the inside and outside of the battery compartment 100 is improved.

[0348] Please refer to FIG. 4 to FIG. 10, in some embodiments, the housing 200 comprises a third side plate 222 and a fourth side plate 223 arranged correspondingly, and the third side plate 222 and the fourth side plate 223 are both provided with the second vent. By arranging the second vent on the third side plate 222 and the fourth side plate 223 arranged correspondingly on the housing 200 respectively, the heat exchange efficiency between the accommodating space and the external environment of the housing 200 is improved.

[0349] Please refer to FIG. 4 to FIG. 10, in some embodiments, in the ventilation direction of the second ventilation port, the projection of the first ventilation port on the first side plate 105 at least partially overlaps with the projection of the second ventilation port on the third side plate 222 adjacent thereto. In the ventilation direction of the second ventilation port, the projection of the first ventilation port on the second side plate 106 at least partially overlaps with the projection of the second ventilation port on the fourth side plate 223 adjacent thereto. By adjacently arranging the first ventilation port on the first side plate 105 and the second ventilation port on the third side plate 222 and at least partially overlapping the projections of the two adjacent ventilation ports, and by adjacently arranging the first ventilation port on the second side plate 106 and the second ventilation port on the fourth side plate 223 and at least partially overlapping the projections of the two adjacent ventilation ports, the heat generated by the battery pack 300 can be discharged to the outside of the outer housing 200 in the form of a hot air flow along a straight path, and the heat dissipation efficiency of the battery pack 300 and the containing space is improved by arranging two first ventilation ports and two second ventilation ports, achieving the purpose of quickly cooling the battery pack 300 and the power conversion circuit board 231.

[0350] In some embodiments, the first ventilation port on the first side plate 105 and the first ventilation port on the second side plate 106 are both provided with a first heat dissipation fan 113 to accelerate the heat dissipation efficiency in the battery compartment 100.

[0351] Please refer to FIG. 4 to FIG. 10, in some embodiments, the first heat dissipation fan 113 on the first side plate 105 and the second side plate 106 are both configured to discharge air to the outside of the battery compartment 100. Further, the battery pack 300 is provided with an air inlet and an air outlet, and the air outlet of the battery pack 300 corresponds to the first ventilation port and is on the same ventilation path. Due to the blockage of the battery cell 301 inside the battery pack 300, blowing air into the battery pack 300 will not achieve good heat dissipation effect. Compared with the way of blowing air into the battery compartment 100, discharging air to the outside by the first heat dissipation fan 113 can effectively extract the heat in the battery pack 300 through air flow, achieving better heat dissipation effect.

[0352] Of course, in another embodiment, a heat dissipation fan can be arranged between the first side plate 105 and the third side plate 222 to discharge air to the first ventilation port and the second ventilation port. Similarly, a heat dissipation fan can also be arranged between the second side plate 106 and the fourth side plate 223 to discharge air to the first ventilation port and the second ventilation port at the other end.

[0353] As shown in FIG. 5 and FIG. 8, in some embodiments, the first ventilation openings on the first side plate 105 and the second side plate 106 all exhaust air to the outside, while the second ventilation openings on the third side plate 222 and the fourth side plate 223, one of which blows air into the containing space, and the other of which exhausts air from the containing space to the outside. Moreover, the first ventilation openings also exhaust air through the second ventilation openings, so that the air flow of the first ventilation openings on one side of the power conversion device is in the same direction as the second ventilation openings, while the air flow of the first ventilation openings on the other side is in the opposite direction of the second ventilation openings, resulting in the air flow of the first ventilation openings being sucked into the containing space before being exhausted through the second ventilation openings, which affects the heat dissipation of the power conversion circuit board 231. Based on the above problems, a flow guide member 114 is arranged at the first ventilation opening in the present application, which can guide the air flow of the first ventilation opening to the second ventilation opening and exhaust it. Although part of the air flow that is exhausted through the first ventilation opening and then through the second ventilation opening is sucked back into the second containing space, the air flow that is exhausted through the second ventilation opening has at least partially exchanged heat with the external environment after being in contact with it, and the air flow has partially dissipated heat, so that the influence on the heat dissipation of the power conversion circuit board 231 is small after being sucked into the containing space. In some embodiments, the flow guide member 114 includes a flow guide pipe.

[0354] In some embodiments, the battery pack 300 (specifically the second specification battery pack in the present application) is provided with a first terminal for electrical connection with the outside at both ends, and the first side plate 105 and the second side plate 106 are both provided with a second terminal 119 capable of electrical connection with the first terminal and located above the first ventilation opening. After the battery pack 300 is assembled with the battery compartment 100, the first terminal is electrically connected with the second terminal 119, and the air flow passing through the first terminal and the second terminal 119 can be exhausted through the first ventilation opening and the second ventilation opening of the power conversion device. Therefore, the first ventilation opening and the second ventilation opening can not only dissipate heat from the battery pack 300 and the inverter circuit board, but also dissipate heat generated during the conduction of the first terminal and the second terminal 119.

[0355] In some embodiments, the battery compartment 100 is provided with a compartment cover 101, and a gap for air flow is provided between the compartment cover 101 and the battery compartment 100. At least part of the air flow entering the battery compartment 100 through the gap can flow through the first terminal and the second terminal 119 and be exhausted through the first ventilation opening and the second ventilation opening of the power conversion device.

[0356] As shown in FIG. 8, in some embodiments, part of the air flow entering the battery compartment 100 through the gap passes through the first terminal and the second terminal 119, and another part of the air flow enters the battery pack 300, passes through the battery cells 301 inside the battery pack 300, and is exhausted from the battery pack 300. Finally, both parts of the air flow are exhausted through the first ventilation opening and the second ventilation opening of the power conversion device.

[0357] Of course, the vent hole can also be directly provided on the cover 101, so that the airflow enters the battery compartment 100 through the vent hole on the cover 101, and then enters the battery pack 300 and flows through the first terminal and the second terminal 119.

[0358] Please refer to FIGS. 4-10, the battery compartment 100 of the present application has an opening, the battery pack 300 is detachably installed in the battery compartment 100 through the opening of the battery compartment 100, and the battery compartment 100 can be at least partially accommodated in the outer shell 200. After assembly, the battery compartment 100 and the outer shell 200 form a containing space therebetween. The containing space includes a first space, a second space, and a third space. The first space is provided on one side of the battery compartment 100, and the first space is provided with a first circuit board. The second space is provided on the other side of the battery compartment 100 opposite the first space, and the second space is provided with a second circuit board. The third space is provided between the first space and the second space, and the inverter module is located in the third space. Further, the first space, the second space, and the third space are located between the third side plate 222 and the fourth side plate 223, and the gas entering the outer shell 200 through the second vent of the third side plate 222 can flow through the first space, the second space, and the third space and then flow out of the outer shell 200 through the second vent of the fourth side plate 223.

[0359] It should be noted that the technical features related to the electric energy conversion circuit board 231, the inverter module, the inverter circuit board, etc. in the present application all refer to the same functional component, which mainly functions to convert direct current into alternating current and / or convert alternating current into direct current, or convert direct current between different voltages.

[0360] In some embodiments, the first circuit board is arranged to extend in the ventilation direction of the second vent in the first space, the second circuit board is arranged to extend in the ventilation direction of the second vent in the second space, and the inverter module is arranged to extend in the ventilation direction of the second vent in the third space. Such 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.

[0361] In some embodiments, the inverter module is provided with a second heat dissipation fan 201 at both ends, and each second heat dissipation fan 201 is at least partially overlapped and correspondingly arranged with the second vent adjacent thereto in the ventilation direction of the second vent. By arranging the second heat dissipation fan 201, the airflow speed near the inverter module is improved, and the heat exchange efficiency between the inverter module and the airflow is improved. In combination with the above-mentioned battery compartment 100 which dissipates heat through the first vent and then through the second vent, it is realized that both of the two main heat sources (the battery pack 300 and the inverter module) in the present application are finally discharged through the second vent.

[0362] In some embodiments, the second cooling fan 201 at one end of the inverter module is configured to blow air to the inverter module, and the second cooling fan 201 at the other end of the inverter module is configured to extract the air flow through the inverter module, so that the external cold air passes through the inverter module in a way of blowing and extracting, and the inverter module is cooled.

[0363] In some embodiments, in the ventilation direction of the second ventilation opening, the projection of the inverter module at least partially overlaps the projection of the second ventilation opening on the third side plate 222 and the projection of the second ventilation opening on the fourth side plate 223. In this way, the air flow entering from the outside and passing through the inverter module can be directly discharged in the same direction, and the ventilation path does not need to be bent, reducing the kinetic energy loss in the air flow process and improving the cooling rate.

[0364] Please refer to FIGS. 3 to 8, in some embodiments, the third cooling fan (not shown in the figure) corresponding to the second ventilation opening is arranged on the third side plate 222 and the fourth side plate 223, and the third cooling fan can discharge the hot air flow in the battery compartment 100 and the accommodation space to the power conversion device. In the present embodiment, the third cooling fan is used to cool the battery compartment 100 and the accommodation space. In some embodiments, in the up-down direction, the third cooling fan at both ends of the power conversion device spans the first ventilation opening and the inverter module. In some embodiments, the third cooling fan on the third side plate 222 blows air to the first ventilation opening and the inverter module, and the third cooling fan on the fourth side plate 223 extracts air from the first ventilation opening and the inverter module and discharges air to the outside.

[0365] Please refer to FIGS. 4 to 8, in some embodiments, in the ventilation direction of the second ventilation opening, the projection of any one of the projection of the first ventilation opening on the first side plate 105, the projection of the first ventilation opening on the second side plate 106, the projection of the second ventilation opening on the third side plate 222, and the projection of the second ventilation opening on the fourth side plate 223 at least partially overlaps the projection of each of the other three. In this way, the ventilation paths of the ventilation openings at both ends of the power conversion device can be arranged in the same path or substantially along the same path.

[0366] In some embodiments, the height of the first ventilation opening and the second ventilation opening at one end of the power conversion device is different from the height of the first ventilation opening and the second ventilation opening at the other end of the power conversion device.

[0367] As shown in FIG. 8 and FIG. 10, in some embodiments, the first terminal at one end of the battery pack 300 can supply power to the second terminal 119 on the first side plate 105, the first terminal at the other end of the battery pack 300 can supply power to the second terminal 119 on the second side plate 106, and the inverter module can receive the power supply of the second terminal 119 on the first side plate 105 and the second terminal 119 on the second side plate 106 and convert the power to discharge externally. In some embodiments, the first terminals at both ends of the battery pack 300 can simultaneously discharge externally or simultaneously receive power to charge themselves.

[0368] As shown in FIG. 3 and FIG. 10, in some embodiments, the first terminal at one end of the battery pack 300 is electrically connected to the second terminal 119 on the first side plate 105, the first terminal at the other end of the battery pack 300 is electrically connected to the second terminal 119 on the second side plate 106, and the inverter module can receive the power supply of the second terminal 119 on the first side plate 105 and the second terminal 119 on the second side plate 106 and convert the power to charge the battery pack 300.

[0369] As shown in FIG. 3 and FIG. 10, further, the second terminal 119 in the present application is arranged on the terminal seat 118, the terminal seat 118 is pivotably connected to the mounting seat 120 on the battery compartment 100 through the rotating shaft 121, specifically, the mounting seat 120 is provided with the first connecting hole 1201, the terminal seat 118 is provided with the second connecting hole 1181, and the rotating shaft 1201 is rotatably connected in the first connecting hole 1201 and the second connecting hole 1181 to realize the rotating installation of the terminal seat 118 on the mounting seat 120. Therefore, the second terminal 119 can rotate with the terminal seat 118 relative to the mounting seat 120 of the battery compartment 100, the rotating shaft 121 is provided with the torsional spring 122 and the acting force of the torsional spring 122 acts on the terminal seat 118 and the mounting seat 120 of the battery compartment 100. In the initial state, under the action of the acting force of the torsional spring 122, the second terminal 119 on the terminal seat 118 is located in the area between the battery compartment 100 and the outer shell 200, so that the second terminal 119 can be protected when the battery pack 300 is not inserted, and the battery compartment 110 is also provided with the side opening hole 107, and the terminal seat 118 partially extends into the battery compartment 100 through the side opening hole 107. When the battery pack 300 is inserted into the battery compartment 100, the battery pack 300 first contacts the part of the terminal seat 118 located in the battery compartment, and when the battery pack 300 continuously moves into the battery compartment 100, the battery pack 300 continuously pushes the terminal seat 118, the terminal seat 118 rotates under the rotating support of the rotating shaft 121 and makes the second terminal 119 on the terminal seat 118 gradually contact and electrically connect with the first terminal on the battery pack 300. In the process of inserting the battery pack 300 into the battery compartment 100, the terminal seat 118 is turned over against the elastic force of the torsional spring 122, and when the battery pack 300 is pulled out of the battery compartment 100, the terminal seat 118 is automatically reset under the action of the elastic force of the torsional spring 122 and returns to the position between the battery compartment 100 and the outer shell 200.

[0370] As shown in FIG. 3 and FIG. 10, in some embodiments, the battery compartment 100 is provided with a locking mechanism 111, which locks the battery pack 300 when the battery pack 300 is loaded into the battery compartment 100, so as to prevent the battery pack 300 from being separated from the battery compartment 100 under non-human factors. Specifically, the locking mechanism 111 includes a rotatable unlocking key 123 provided on the mounting seat 120 and a locking block 125 for locking or unlocking the battery pack 300. The mounting seat 120 is provided with a sliding groove, and the locking block 125 is partially located in the sliding groove and can move under the limitation of the sliding groove. The locking block 125 is linked with the unlocking key 123 and can move in the sliding groove under the driving of the unlocking key 123 to achieve the unlocking or locking of the battery pack 300.

[0371] As shown in FIG. 10, further, the unlocking key 123 is provided with an extension 1231, and the locking block 125 is provided with a recessed groove 1251, and the extension 1231 is partially located in the recessed groove 1251, so that when the unlocking key 123 is rotated under the action of external force, the unlocking key 123 can exert a driving force on the locking block 125 and drive the locking block 125 to move.

[0372] In some embodiments, the locking block 125 and the mounting seat 120 are further provided with a compression spring 124, and under the elastic force of the compression spring 124, the locking block 125 remains in an extended state to keep the locking of the battery pack 300. Only when the unlocking block is driven to rotate under the operation of external force and drives the locking block 125 to move away from the battery pack 300 against the elastic force of the compression spring 124, the unlocking of the battery pack 300 can be achieved.

[0373] In some embodiments, the bottom of the battery compartment 100 is provided with a pop-up mechanism 102, which pops up the battery pack 300 by a part of the original height when the locking structure releases the locking of the battery pack 300, so as to facilitate the operator to take out the battery pack 300.

[0374] Please refer to FIG. 2 to FIG. 10, the application further provides an outdoor work vehicle system, which comprises a battery pack 300, a power conversion device and an outdoor work vehicle. The power conversion device comprises an outer shell 200, a battery compartment 100 and an inverter module. The outer shell 200 is provided with an external power supply interface 217 which can be electrically connected with an external power supply to receive external electric energy. The battery compartment 100 is at least partially accommodated in the outer shell 200 and can accommodate the battery pack 300. The inverter module is arranged in the accommodating space formed by the battery compartment 100 and the outer shell 200 and can receive the electric energy of the external power supply and convert the electric energy to supply power to the battery pack 300. The battery compartment 100 is provided with a first ventilation opening for heat dissipation of the battery pack 300, and the outer shell is provided with a second ventilation opening for heat dissipation of the accommodating space. In the ventilation direction of the second ventilation opening, the projection of the first ventilation opening at least partially overlaps the projection of the second ventilation opening. Such arrangement facilitates the battery pack 300 in the battery compartment 100 inside the outer shell 200 to discharge heat through the first ventilation opening and then through the second ventilation opening on the outer shell 200, and the second ventilation opening also serves to dissipate heat of the electric energy conversion circuit board 231, so that the heat generated by the battery pack 300 and the heat generated by the electric energy conversion circuit board 231 can be discharged to the outside of the energy storage bidirectional power supply through the second ventilation opening. The outdoor work vehicle can be connected with the power conversion device. When the power conversion device converts the electric energy of the external power supply and charges the energy device on the outdoor work vehicle, the power conversion device stops charging the battery pack 300. In some embodiments, the power conversion device can charge the battery pack 300 accommodated in the battery compartment 100 and also can charge the outdoor work vehicle. Of course, when charging the outdoor work vehicle, the battery pack 300 accommodated in the power conversion device cannot be charged.

[0375] In some embodiments, the power conversion device can simultaneously charge the battery pack 300 accommodated in the battery compartment 100 and also can charge the outdoor work vehicle. In some embodiments, the power conversion device can simultaneously charge the battery pack 300 accommodated in the battery compartment 100 and also can charge the outdoor work vehicle, and can also provide electric energy for the outdoor electrical appliances.

[0376] In some embodiments, the outdoor work vehicle system adopts the power conversion device in the above-mentioned embodiments, wherein the battery compartment 100 comprises a first side plate 105 and a second side plate 106 which are correspondingly arranged and are both provided with the first ventilation opening. By arranging the first ventilation opening on the correspondingly arranged first side plate 105 and second side plate 106 of the battery compartment 100, the heat exchange efficiency between the inside and outside of the battery compartment 100 is improved.

[0377] In some embodiments, the outer shell 200 comprises a third side plate 222 and a fourth side plate 223 which are correspondingly arranged and each of which is provided with a second air vent. By arranging the second air vents on the correspondingly arranged third side plate 222 and fourth side plate 223 of the outer shell 200, the heat exchange efficiency between the accommodation space and the external environment of the outer shell 200 is improved.

[0378] Please refer to FIGS. 3-10, in some embodiments, in the air venting direction of the second air vent, the projection of the first air vent on the first side plate 105 at least partially overlaps with the projection of the second air vent on the adjacent third side plate 222. In the air venting direction of the second air vent, the projection of the first air vent on the second side plate 106 at least partially overlaps with the projection of the second air vent on the adjacent fourth side plate 223. By arranging the first air vent on the first side plate 105 adjacent to the second air vent on the third side plate 222 and at least partially overlapping the projections of the two adjacent air vents, and by arranging the first air vent on the second side plate 106 adjacent to the second air vent on the fourth side plate 223 and at least partially overlapping the projections of the two adjacent air vents, the heat generated by the battery pack 300 can be discharged to the outside of the outer shell 200 in the form of a straight airflow through the first air vent and the second air vent, and the heat dissipation efficiency of the battery pack 300 and the accommodation space is improved by arranging two first air vents and two second air vents 221, and the heat accumulation is effectively avoided by dissipating heat from the inner shell and the accommodation space between the inner shell and the outer shell, which quickly cools the battery pack 300 and the power conversion circuit board 231.

[0379] In some embodiments, the first air vent on the first side plate 105 and the first air vent on the second side plate 106 are each provided with a first heat dissipation fan 113, which improves the heat dissipation efficiency in the battery compartment 100.

[0380] In some embodiments, the first heat dissipation fan 113 on the first side plate 105 and the second side plate 106 is configured to discharge air outside the battery compartment 100. Further, the battery pack 300 is provided with an air inlet and an air outlet, and the air outlet of the battery pack 300 corresponds to the first air vent and is on the same air venting path. Since the battery pack 300 is blocked by the battery cells 301 inside, blowing air into the battery pack 300 will not have a good heat dissipation effect. Compared with the way of blowing air into the battery compartment 100, discharging air outside by the first heat dissipation fan 113 can effectively extract and discharge the heat in the battery pack 300 through airflow.

[0381] In some embodiments, the battery pack 300 is provided with a first terminal at each end for electrical connection with the outside, and the first side plate 105 and the second side plate 106 are each provided with a second terminal 119 capable of electrical connection with the first terminal, and the second terminal 119 is located above the first vent. The airflow passing 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, and the first vent and the second vent can simultaneously dissipate heat from the first terminal and the second terminal 119.

[0382] In some embodiments, the battery compartment 100 is provided with a compartment cover 101, and a gap is provided between the compartment 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 pass 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.

[0383] 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 of the airflow enters the battery pack 300, passes through the battery cells 301 inside the battery pack 300, and is discharged from the battery pack 300. Finally, both parts of the airflow pass through the first vent and the second vent and are discharged from the power conversion device.

[0384] Please refer to FIGS. 3-10, the present application also provides an outdoor work vehicle system, which includes a battery pack 300, a power conversion device, and an outdoor work vehicle. The power conversion device includes an outer housing 200, a battery compartment 100, and an inverter module. The outer housing 200 is provided with an external power source interface 217 for electrical connection with an external power source to receive external electrical energy. The battery compartment 100 is at least partially accommodated in the outer housing 200, and the battery compartment 100 can accommodate the battery pack 300. The inverter module is disposed in a containing space formed by the battery compartment 100 and the outer housing 200, and the inverter module is electrically connected with the external power source interface 217. The battery compartment 100 is provided with a first vent for heat dissipation of the battery pack 300, and the outer housing is provided with a second vent for heat dissipation of the containing space. In the ventilation direction of the second vent, the projection of the first vent at least partially overlaps the projection of the second vent.

[0385] The outdoor work vehicle can be connected with the power conversion device, and the power conversion device can convert the external power source into electrical energy for charging an energy device on the outdoor work vehicle. The outdoor work vehicle system in the present application uses the power conversion device in the above embodiments. The energy device on the outdoor work vehicle is the battery pack 300.

[0386] In some embodiments, the battery pack 300 can be detached from the power conversion device and used to power the outdoor work vehicle, thereby expanding the use scenarios of the battery pack 300.

[0387] The application also provides a bidirectional energy storage power supply, which comprises an inner shell, an outer shell 200 and an inverter circuit board. The inner shell is configured to be detachably assembled to a battery pack 300. The inner shell comprises a first air inlet 103 and a first air outlet 104. A first air flow channel is formed between the battery pack 300 and the inner shell. The path of the first air flow channel comprises: air flowing into the inner shell through the first air inlet 103, entering the battery pack 300, and then being discharged from the battery pack 100 through the first air outlet 104. The outer shell 200 is arranged outside the inner shell. The outer shell 200 comprises a second air inlet 220 and a second air outlet 221. A second air flow channel is formed between the inner shell and the outer shell 200. The inverter circuit board is configured to convert the electric energy of the battery pack 300 into external discharge and / or convert external electric energy into charging of the battery pack 300. The inverter circuit board is located between the inner shell and the outer shell 200 and at least partially located in the second air flow channel. Air flowing into the second air flow channel through the second air inlet 220 passes through the inverter circuit board and is then discharged from the outer shell 200 through the second air outlet 221. The air discharged from the first air outlet 104 can be discharged from the outer shell 200 through the second air outlet 221. In the application, the battery pack 300 in the inner shell is cooled by the first air flow channel, and the inverter circuit board between the inner shell and the outer shell 200 is cooled by the second air flow channel. Finally, the first air flow channel and the second air flow channel share the second air outlet 221 to discharge air externally, effectively avoiding the accumulation of heat and achieving rapid cooling of the battery pack 300 and the inverter circuit board.

[0388] It should be noted that the first air outlet 104 in the application is equivalent to the first air vent in the above-mentioned embodiments, and the second air outlet 221 is equivalent to the second air vent in the above-mentioned embodiments.

[0389] In some embodiments, the battery pack 300 comprises a battery pack air inlet and a battery pack air outlet. The air flow in the first air flow channel enters the battery pack through the battery pack air inlet, passes through the battery cell 301 in the battery pack 300, and is then discharged from the battery pack 300 through the battery pack air outlet and the first air outlet 104 of the inner shell. In this way, the battery cell 301 inside the battery pack 300 can be cooled.

[0390] It should be noted that the third air vent described above comprises a battery pack air inlet and a battery pack air outlet, i.e. the third air vent comprises a plurality of air vents, part of which is the battery pack air inlet and the other part is the battery pack air outlet.

[0391] In some embodiments, the inner shell includes a first side plate 105 and a second side plate 106 arranged correspondingly, and the first side plate 105 and the second side plate 106 are both provided with a first air outlet 104, and the first air outlet 104 is provided with a cooling fan for discharging air outside the inner shell. The battery pack 300 is located between the two first air outlets 104. The first air outlet 104 is arranged at both ends of the battery pack 300, and the air entering the battery pack 300 is discharged outside by the two first air outlets 104. Compared with one air outlet, the two first air outlets 104 can improve the heat dissipation efficiency of the battery pack 300.

[0392] 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.

[0393] As shown in FIGS. 8 and 10, in some embodiments, the battery pack 300 is provided with a first terminal, the inner shell is provided with a second terminal 119, and the first terminal and the second terminal 119 are electrically connected when the battery pack 300 is assembled in the inner shell. The air entering the inner shell through the first air inlet 103 is discharged through the first air outlet 104 after passing through the first terminal and the second terminal 119. 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 is dissipated, so that the air entering the inner shell can not only dissipate heat from the battery pack 300, but also dissipate heat from the first terminal and the second terminal 119 in electrical contact.

[0394] 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, and the air 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. Such an arrangement can dissipate the heat generated when the first terminal and the second terminal 119 are in electrical contact, which is beneficial to the overall heat dissipation of the energy storage bidirectional power supply.

[0395] As shown in FIGS. 3 and 8, in some embodiments, the inner shell is a containing cavity with an opening, and the battery pack 300 is detachably arranged in the containing cavity. The first air inlet 103 is at least part of the opening of the inner shell. Such an arrangement allows the opening of the inner shell for disassembly of the battery pack 300 to also be used for air flow into the inner shell to dissipate heat from the battery pack 300 and the plurality of terminals for electrical connection in the inner shell.

[0396] In some embodiments, the battery pack 300 further includes a control board assembly for controlling charging and discharging of the battery pack 300, and the air entering the battery pack 300 can also dissipate heat from the control board assembly.

[0397] In some embodiments, at least a control circuit board 227 capable of controlling the operation of the inverter circuit board is arranged between the inner housing and the outer housing 200, and an output circuit board 226 capable of supplying power to at least one of the control circuit board 227 and the inverter circuit board is arranged. The air flow entering the second air flow passage through 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.

[0398] The second air flow passage formed between the second air inlet 220 and the second air outlet 221 can dissipate heat from the control circuit board 227, the output circuit board 226, and the inverter circuit board arranged between the inner housing and the outer housing 200.

[0399] As shown in FIGS. 3, 7, and 8, in some embodiments, a containing space is formed between the inner housing and the outer housing 200, and the second air flow passage is at least partially located in the containing space. The containing space includes a first space, a second space, and a third space. Specifically, the first space is arranged on one side of the inner housing, and the control circuit board 227 is located in the first space. The second space is arranged on the other side of the inner housing corresponding to the first space, and the output circuit board 226 is located in the second space. The third space is arranged 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. The air flow entering the second air flow passage through the second air inlet 220 passes through the control circuit board 227, the output circuit board 226, and the inverter circuit board in the containing space and is discharged through the second air outlet 221. In the present application, the area between the inner housing and the outer housing 200 is divided into three space areas, which are located on the front side, the back side, and below the bottom of the inner housing, respectively. The control circuit board 227, the output circuit board 226, and the inverter circuit board in the above three space areas are cooled by the air flow through the second air flow passage.

[0400] Referring to FIGS. 5 and 7, in some embodiments, the outer housing 200 includes a third side plate 222 and a fourth side plate 223 arranged correspondingly. The second air inlet 220 is arranged on the third side plate 222, and the second air outlet 221 is arranged 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. The air flow enters the containing 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 is discharged to cool the control circuit board 227, the output circuit board 226, and the inverter circuit board.

[0401] Referring to FIGS. 5 and 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 arranged symmetrically.

[0402] In some embodiments, at least one of the second air inlet 220 and the second air outlet 221 is provided with a cooling fan, specifically, the second air inlet 220 or the second air outlet 221 is provided with a cooling fan, or both the second air inlet 220 and the second air outlet 221 are provided with cooling fans.

[0403] In some embodiments, the battery pack 300 is located above the inverter circuit board, and the inner shell has an upwardly open accommodating cavity, so that the battery pack 300 can be taken out without being interfered by the inverter circuit board.

[0404] Meanwhile, referring to FIGS. 5, 7 and 8, in some embodiments, the inner shell (the battery compartment 100) includes a first side plate 105 and a second side plate 106 arranged correspondingly, and the first side plate 105 and the second side plate 106 are both provided with the first air outlet 104. The outer shell 200 includes a third side plate 222 and a fourth side plate 223 arranged correspondingly, the second air inlet 220 is arranged on the third side plate 222, and the second air outlet 221 is arranged on the fourth side plate 223. The two first air outlets 104 are located in the same straight line direction with the second air inlet 220 and the second air outlet 221 in the 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, and relative to the curved air flow channel, the straight line arrangement in this embodiment is more conducive to the discharge of air flow.

[0405] In some embodiments, the first air outlet 104 is arranged adjacent to the second air flow channel, and the first air outlet 104 is provided with a flow guide member 114 capable of guiding the air flow discharged from the first air outlet 104 to the second air outlet 221. The air flow discharged from the first air outlet 104 is guided by the flow guide member 114 and discharged through the second air outlet 221.

[0406] Referring to FIGS. 5, 7, 8, 9 and 10, in some embodiments, the first air outlet 104 on the first side plate 105 and the second side plate 106 both discharge air, the second air inlet 220 on the third side plate 222 is used for air intake, and the second air vent on the fourth side plate 223 is used for air discharge. Moreover, the first air outlet 104 also discharges air through the second air inlet 220, and the first side plate 105 is adjacent to and corresponds to the third side plate 222, and the second side plate 106 is adjacent to and corresponds to the fourth side plate 223. In this way, the ventilation directions of the first air outlet 104 and the second air outlet 221 on one side of the two sides are the same, and the ventilation directions of the first air outlet 104 and the second air inlet 220 on the other side of the inner shell are opposite, which easily causes the air discharged by the first air outlet 104 to be sucked into the second airflow channel before being discharged through the second air inlet 220, thereby affecting the heat dissipation of the power conversion circuit board 231. Based on the above problem, the flow guide piece 114 is arranged at the first air outlet 104 in the present application, which can guide the airflow discharged by the first air outlet 104 to be discharged through the second air inlet 220 (i.e., part of the second air inlet 220 is used for air discharge of the first air outlet 104). Although part of the airflow discharged through the first air outlet 104 and then discharged through the second air inlet 220 is sucked back into the second airflow channel, the airflow discharged through the second air inlet 220 contacts the external environment and has at least achieved a part of heat exchange, and the influence on the heat dissipation of the inverter circuit board is small after being sucked into the second airflow channel.

[0407] As shown in FIG. 10, in some embodiments, the flow guide piece 114 is a tubular structure.

[0408] In some embodiments, the flow guide piece 114 is provided with a wire harness limiting portion 116, the inner shell is provided with an external terminal for electrical connection with the battery pack 300, and a wire harness is connected between the external terminal and the control circuit board 227. The wire harness is limited by the wire harness limiting portion 116 and located outside the flow guide piece 114. In this way, the wire harness is prevented from being blocked at the first air outlet 104, thereby preventing the flow speed of the airflow from being affected. It should be noted that the external terminal in the present embodiment is functionally equivalent to the second terminal 119 in other embodiments.

[0409] As shown in FIG. 9 and FIG. 10, in some embodiments, the flow guide 114 is partially configured as a fan cover for accommodating the first heat dissipation fan 113, the fan cover circumferentially surrounds the first heat dissipation fan 113, and the airflow generated by the rotation of the first heat dissipation fan 113 can be discharged from the battery compartment 100 through another part of the flow guide 114 via the fan cover. With such a configuration, the airflow generated by the first heat dissipation fan 113 can be reduced in transmission to the flow guide 114, i.e., the airflow generated by the rotation of the first heat dissipation fan 113 can be almost entirely used for air extraction in the battery compartment 100 by using the wind guide cover 115 to guide the airflow, thereby improving the heat dissipation efficiency in the battery compartment 100 and the battery pack 300 placed in the battery compartment 100.

[0410] As shown in FIG. 10, in some embodiments, the wire harness limiting part 116 is arranged on the fan cover and located at the same end surface of the fan cover.

[0411] As shown in FIG. 10, in some embodiments, the fan cover is further provided with a terminal seat avoiding part 117 for avoiding the rotation of the terminal seat 118. Specifically, the terminal seat 118 is arranged above the fan cover, and the terminal seat 118 and the fan cover are arranged in an upper-lower adjacent manner. The terminal seat 118 is driven to rotate when the battery pack 300 is loaded into or taken out of the battery compartment 100. In order to save installation space, the terminal seat 118 is arranged relatively close to the fan cover in the present application, and the terminal seat avoiding part 117 is arranged to avoid the rotation of the terminal seat 118 under the driving of the battery pack 300 without interference from the fan cover.

[0412] In some embodiments, the inner housing is formed with an accommodating cavity configured to accommodate two first-specification battery packs or one second-specification battery pack. The energy storage bidirectional power supply in the present application can be used for charging or discharging two specifications of battery packs.

[0413] In some embodiments, the inverter circuit board is provided with inverter components, and the inverter components are located in the second airflow channel. Since the inverter components are the main source of heat generation of the entire energy storage bidirectional power supply, the use of the second airflow channel for heat dissipation of the inverter components can effectively alleviate the heat generation problem of the entire inverter circuit board, thereby ensuring the normal and efficient conversion of the inverter circuit board to the current.

[0414] Referring to FIGS. 3-9, the application also provides a storage energy bidirectional power supply, which comprises an inner shell, an outer shell 200 and an inverter module. The inner shell is configured to detachably accommodate a battery pack 300, and the inner shell comprises a first air inlet 103 and a first air outlet 104 for air flow for cooling, wherein the air flow entering the inner shell from the first air inlet 103 enters the battery pack 300 and is discharged from the battery pack 100 through the first air outlet 104. The outer shell 200 comprises a second air inlet 220 and a second air outlet 221, and an air flow passage for the cooling air flow is formed between the inner shell and the outer shell 200. The inverter module is at least partially located in the air flow passage between the inner shell and the outer shell 200, and the inverter module is configured to be able to convert the electrical energy of the battery pack 300 to external discharge and / or convert external electrical energy to charge the battery pack 300, wherein the air flow entering the air flow passage from the second air inlet 220 flows through the inverter module and is discharged from the outer shell 200 through the second air outlet 221. The air flow discharged from the first air outlet 104 can be discharged from the outer shell 200 through the second air outlet 221. The application relates to the heat dissipation of two main independent spaces, one is the heat dissipation of the battery pack 300 in the inner shell, the air flow enters the inner shell through the first air inlet 103, then passes through the battery pack 300 and is discharged from the inner shell through the first air outlet 104, and finally is discharged from the outside of the storage energy bidirectional power supply through the second air outlet 221. The other is the heat dissipation of the inverter circuit board between the inner shell and the outer shell 200, specifically, the air flow between the inner shell and the outer shell 200 passes through the inverter module and is discharged through the second air outlet 221. The storage energy bidirectional power supply is cooled through the two air flow paths, which reduces the accumulation of heat and improves the heat dissipation effect.

[0415] As shown in FIGS. 5, 7 and 8, in some embodiments, the first air outlet 104 is adjacent to the second air outlet 221, and a cooling fan is arranged adjacent to the first air outlet 104 and the second air outlet 221, and the cooling fan is configured to blow the air flow in the inner shell and the air flow 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 cost and saves the space occupied by the cooling fan.

[0416] In some embodiments, the cooling fan is located between the first air outlet 104 and the second air outlet 221 in the ventilation direction of the first air outlet 104 or the second air outlet 221.

[0417] Referring to FIGS. 3-9, the application also provides a power conversion device, which comprises an inner housing, an outer housing 200 and an inverter circuit board. The inner housing is configured to be detachably assembled to the battery pack 300, and the inner housing comprises a first air inlet 103 and a first air outlet 104. A first air flow channel is formed between the battery pack 300 and the inner housing, and the path of the first air flow channel comprises: the air flow entering the inner housing through the first air inlet 103, entering the battery pack 300, and being discharged from the battery compartment 100 through the first air outlet 104. The outer housing 200 is arranged outside the inner housing, and the outer housing 200 comprises a second air inlet 220 and a second air outlet 221. A second air flow 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 to external discharge and / or convert external electrical energy to charge the battery pack 300. The inverter circuit board is located between the inner housing and the outer housing 200 and at least partially located in the second air flow channel, wherein the air flow entering the second air flow channel through the second air inlet 220 passes through the inverter circuit board and is discharged from the outer housing 200 through the second air outlet 221. Wherein the first air outlet 104 is arranged adjacent to the second air outlet 221, and the air flow discharged from the first air outlet 104 can be discharged from the outer housing 200 through the second air outlet 221. In the application, the battery pack 300 in the inner housing is cooled by the first air flow path, and the inverter circuit board between the inner housing and the outer housing 200 adopts the second air flow channel, and finally the first air flow channel and the second air flow channel share the second air outlet 221 to discharge air externally, which can realize the common cooling of the battery pack 300 and the inverter circuit board.

[0418] Referring to FIGS. 2-9, the application also provides a power conversion device, which comprises an outer 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 accommodated in the outer housing 200, and the battery compartment 100 can accommodate a battery pack 300. The first functional area is arranged on one side of the battery pack 300, and the first functional area is provided with at least a display panel 212 capable of displaying state information of the power conversion device. The second functional area is arranged on the other side of the battery pack 300 relative to the first functional area, and the second functional area is provided with at least an external power supply port 217 capable of being electrically connected with an external power supply. The power conversion area is arranged between the first functional area and the second functional area and below the battery pack 300, and the power conversion area is provided with a power conversion circuit board 231 capable of receiving electrical energy transmitted by the external power supply port 217 and converting the electrical energy to charge the battery pack 300 and / or converting electrical energy of the battery pack 300 and outputting the electrical energy externally. By arranging different functional areas in the outer housing 200, each functional area is provided with a circuit board having a specific functional property, and each area in the power conversion device is reasonably divided to reasonably arrange each circuit board, and the circuit boards in each functional area do not interfere with each other during disassembly.

[0419] Referring to FIG. 1, FIG. 2, FIG. 6 and FIG. 7, further, the first functional area is provided with a direct current output circuit board and an alternating current output circuit board, the direct current output circuit board is provided with a direct current output port, and the display panel 212 is electrically connected with the direct current output circuit board, and the alternating current output circuit board is provided with the alternating current output port 210.

[0420] Referring to FIG. 1, FIG. 2 and FIG. 6, the direct current output port includes a USB output interface 205 and a cigar lighter output interface 208, the direct current output circuit board is provided with a USB control switch 206 for controlling the on-off of the USB output interface 205 and a cigar lighter control switch 207 for controlling the on-off of the cigar lighter output port.

[0421] Referring to FIG. 1, FIG. 2 and FIG. 6, in some embodiments, the direct current circuit board is further provided with a round hole electrical connection port 209.

[0422] Referring to FIG. 1, FIG. 2 and FIG. 6, the alternating current output port 210 is provided with a plurality of, specifically, 2, 4 or 6, the alternating current output port 210 can output 120V and 240V voltage, and the alternating current output circuit board is provided with an alternating current output control switch 211 for controlling the on-off of the alternating current port.

[0423] Referring to FIG. 1, FIG. 2 and FIG. 6, the first functional area is further provided with a display screen, and the display screen is connected with the direct current output circuit board. The display screen can display the battery pack 300 power, the voltage and current of charging and discharging, and the output power and other information when discharging externally.

[0424] Referring to FIG. 1, FIG. 2, FIG. 6 and FIG. 7, the first functional area is further provided with an illuminating lamp 214 and an illuminating switch 215 for controlling the turning on and off of the illuminating lamp 214, the illuminating lamp 214 is connected with the direct current output circuit board, and the illuminating lamp 214 facilitates the operator to illuminate the first functional area in the environment with insufficient light, so as to carry out plugging operation.

[0425] Referring to FIG. 1, FIG. 2, FIG. 6, FIG. 7 and FIG. 27, the first functional area is further provided with a total switch 213 for controlling the on-off of the entire first functional area, and the on-off of the first functional area is controlled through the total switch 213, so as to prevent the on-off control of the total line when other branch switches fail.

[0426] Referring to FIGS. 1, 2, 6, 7 and 27, the second functional area is provided with a control circuit board 227, which can control the operation of the electric energy conversion circuit board 231 and obtain the electric energy converted by the electric energy conversion circuit board 231. The DC output circuit board is electrically connected with the control circuit board 227 and can transmit the electric energy of the control circuit board 227 to the DC output port. The AC output circuit board is electrically connected with the electric energy conversion circuit board 231 and can transmit the electric energy of the electric energy conversion circuit board 231 to the AC output port 210.

[0427] As shown in FIGS. 7 and 8, in some embodiments, a containing space is formed between the outer shell 200 and the inner shell (the battery compartment 100), and the first functional area, the second functional area and the electric energy conversion area are located in the containing space. The outer shell 200 is further provided with a heat dissipation air outlet capable of dissipating heat from the containing space, which is used for dissipating heat from the first functional area, the second functional area and the electric energy conversion area in the containing space.

[0428] As shown in FIGS. 2 and 7, the second functional area is further provided with an external output port 216 capable of charging the outdoor working vehicle, which is electrically connected with the electric energy conversion circuit board 231, so that the outdoor working vehicle can be charged through the power conversion device.

[0429] As shown in FIGS. 2 and 7, in the present application, the shell is further provided with a pull rod 203 for moving the power conversion device, which is arranged close to the second functional area. Specifically, the pull rod 203 is arranged on the outer shell 200 close to the second functional area. As shown in FIGS. 22 and 23, the pull rod 203 can be a pull-out type pull rod 203.

[0430] As shown in FIG. 7, in some embodiments, the battery compartment 100 includes a fifth side plate 109 and a sixth side plate 110 arranged oppositely, and the outer shell 200 includes a seventh side plate 224 and an eighth side plate 225 arranged correspondingly. The first functional area is located between the fifth side plate 109 and the seventh side plate 224, and the second functional area is located between the sixth side plate 110 and the eighth side plate 225.

[0431] As shown in FIG. 7, it is to be noted that the first side plate 105 and the second side plate 106 and the fifth side plate 109 and the sixth side plate 110 collectively form the complete side wall structure of the battery compartment 100, and the third side plate 222 and the fourth side plate 223 and the seventh side plate 224 and the eighth side plate 225 collectively form the complete side wall structure of the outer shell 200.

[0432] In some embodiments, the electric energy conversion area is located between the bottom plate of the battery compartment 100 and the bottom plate of the outer shell 200.

[0433] The application also provides a power conversion device, comprising a shell, an output circuit board assembly 226, a control circuit board 227 and an inverter circuit board. The output circuit board assembly 226 is arranged on one side of the shell, and the output circuit board assembly 226 is connected with an output port capable of being connected with an external power consumption device. The control circuit board 227 is arranged on the other side of the shell relative to the output circuit board assembly 226. The inverter circuit board is arranged between the output circuit board assembly and the control circuit board 227, and the inverter circuit board can convert external power and supply power to the control circuit board 227.

[0434] In some embodiments, the output circuit board assembly 226 comprises a direct current output circuit board and an alternating current output circuit board, the direct current output circuit board is electrically connected with the control circuit board 227, and the alternating current output circuit board is electrically connected with the inverter circuit board.

[0435] The shell is also provided with a pull rod 203 for moving the power conversion device, and the pull rod 203 is arranged close to the control circuit board 227.

[0436] In some embodiments, an external output port 216 capable of charging an outdoor working vehicle is also arranged on the same side of the control circuit board 227, and the external output port 216 is electrically connected with the inverter circuit board.

[0437] As shown in FIGS. 16, 17 and 22, the application also provides a power conversion device, comprising an outer shell 200, a pull rod 203 and a warehouse cover 101, the outer shell 200 comprises a battery warehouse 100 with an opening, the battery warehouse 100 is configured to accommodate a battery pack 300, the outer shell 200 is provided with an inverter assembly, the inverter assembly can be electrically connected with the battery pack 300 and can convert the power of the battery pack 300 to discharge externally and / or convert the power of the mains to charge the battery pack 300. The pull rod 203 is connected with the outer shell 200 and can be extended or retracted along the height direction of the power conversion device. The warehouse cover 101 is hinged with the outer shell 200 and can be pivoted relative to the outer shell 200 to close or open the opening of the battery warehouse 100, and the maximum opening angle of the warehouse cover 101 is greater than 90° and less than or equal to 150° in the retracted state of the pull rod 203. By setting the opening angle of the warehouse cover 101 to be greater than 90° and less than or equal to 150°, interference caused by the warehouse cover 101 when taking and placing the battery pack 300 can be avoided, and the operator can easily operate the taking and placing of the battery pack 300 in the battery warehouse 100.

[0438] In some embodiments, the pull rod 203 can be a telescopic pull rod, and the telescopic pull rod 203 is in the retracted state when the warehouse cover 101 is opened.

[0439] As shown in FIG. 2 and FIG. 16, in some embodiments, the height of the hinge position of the cover 101 and the outer shell 200 is lower than the uppermost of the pull rod 203, in some embodiments, the hinge assembly 112 is connected to 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 pull rod 203 is a telescopic pull rod 203, due to the need to match the pulling of the operator, the telescopic pull rod 203 is in the retracted state, the uppermost height is also relatively high, generally the uppermost height of the telescopic pull rod 203 is higher than the hinge position of the cover 101 and the outer shell 200.

[0440] In order to limit the opening angle of the cover 101, in some embodiments, an abutting surface 1011 is arranged on the cover 101, and a limiting block 1012 is arranged on the outer shell 200, when the cover 101 is in the open position, the abutting surface 1011 abuts against the limiting block 1012, through the abutting cooperation of the abutting surface 1011 on the cover 101 and the limiting block 1012 on the outer shell 200, the opening angle of the cover 101 can be effectively limited. Of course, the angle of the cover 101 when opened can also be set by setting the angle of the cover 101 and the limiting block 1012 when abutting.

[0441] In some embodiments, the maximum opening angle of the cover 101 relative to the horizontal plane is 120°.

[0442] As shown in FIG. 16 and FIG. 17, in order to reduce the automatic falling or opening of the cover 101 under non-human action, the present application also includes a hinge assembly 112 connected to the cover 101 and the outer shell 200, the hinge assembly 112 includes a first hinge part 1121 arranged on the cover 101 and a second hinge part 1122 arranged on the outer shell 200, a connecting piece 1123 is connected between the first hinge part 1121 and the second hinge part 1122, and a damping piece 1124 capable of acting between the first hinge part 1121 and the second hinge part 1122 is arranged on the connecting piece 1123. Through the arrangement of the damping piece 1124, the automatic falling of the cover 101 in the open state can be reduced, so as to prevent the cover 101 from being damaged due to the collision with the power conversion device as a whole under the action of gravity. It can also effectively reduce the opening of the cover 101 in the moving state by non-human.

[0443] As shown in FIGS. 17 and 18, further, the first hinge part 1121 is provided with a first connecting hole 11211, the second hinge part 1122 is provided with a second connecting hole 11221, and the connecting piece 1123 is inserted into the first connecting hole 11211 and the second connecting hole 11221 to rotationally connect the first hinge part 1121 and the second hinge part 1122 for relative rotation. Specifically, the connecting piece 1123 is a screw and nut structure, and the damping piece 1124 is an annular structure, which is sleeved on the screw and screwed on the screw, and acts on the first hinge part 1121 and the second hinge part 1122 to generate a damping force. Specifically, the damping piece is made of soft material.

[0444] As shown in FIGS. 17 and 18, in some embodiments, when installed, the damping piece 1124 is at least partially accommodated in the second connecting hole 11221 and located between the nut and the first hinge part 1121. When the operator rotates the screw, the nut moves relative to the screw and from one end of the screw to the other end, in the process, the nut pushes the damping piece 1124, and due to the restriction of the first hinge part 1121, the damping piece 1124 is continuously extruded to generate deformation and gradually increase the force acting on the inner wall of the second connecting hole 11221. In this way, the size of the damping force between the first hinge part 1121 and the second hinge part 1122 can be adjusted to meet the different use requirements of the operator for adjusting the size of the damping force when opening or closing the lid 101.

[0445] As shown in FIGS. 2 and 16, 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 lid 101 has two rotation support points when rotating relative to the outer shell 200, so that the lid 101 can be more stable during rotation, and the damage to the lid 101 or the outer shell 200 caused by uneven force can be reduced.

[0446] In some embodiments, the lid 101 is made of transparent or translucent material. In some embodiments, the light transmittance of the lid 101 is greater than or equal to 30% and less than or equal to 99%, and in some embodiments, the light transmittance of the lid 101 is 30%, 50%, 65% and 90%. The higher the transparency, the more convenient it is for the operator to observe the situation in the battery compartment 100 through the lid 101.

[0447] In some embodiments, the first sensing element is arranged on the cover 101, and the second sensing element capable of signal sensing with the first sensing element is arranged on the outer shell 200. When the cover 101 is in the closed position, the first sensing element can signal sense with the second sensing element. When the cover 101 is in the open position, the first sensing element is disconnected from the signal sensing with the second sensing element. By signal sensing of the first sensing element and the second sensing element, the opening of the cover 101 is monitored. If the power conversion device is in use, the cover 101 is opened, and the power conversion device reduces its operating power to prevent the operator from being electrocuted, thereby protecting the operator. Further, the first sensing element and the second sensing element can be a Hall sensing element, a photoelectric switch, or a mechanical switch, etc.

[0448] As shown in FIGS. 8 and 16, the present application also provides a power conversion device, which includes an outer shell 200, a pull rod 203, and a cover 101. The outer shell 200 includes a battery compartment 100 having an opening, the battery compartment 100 is configured to accommodate a battery pack 300, and the outer shell 200 is provided with an inverter assembly capable of being electrically connected with the battery pack 300 and capable of converting the electrical energy of the battery pack 300 to discharge externally and / or converting external electrical energy to charge the battery pack 300. The pull rod 203 is connected with the outer shell 200 and can be extended or retracted 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 be pivoted relative to the outer shell 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 an avoiding portion 126, and when the cover 101 switches between the open position and the closed position, the cover 101 can bypass the pull rod 203 through the avoiding portion 126. By arranging the avoiding portion 126 on the cover 101, interference caused by the pull rod 203 when the cover 101 is switched on or off can be avoided. Specifically, the pull rod 203 is a telescopic pull rod 203.

[0449] As shown in FIGS. 16 and 17, in some embodiments, the cover 101 is provided with an abutting surface 1011 near the edge of one side of the hinged assembly 112, and the outer shell 200 is provided with a limiting block 1012. When the cover 101 is in the open position, the abutting surface 1011 can abut against the limiting block 1012. By abutting cooperation of the abutting surface 1011 on the cover 101 and the limiting block 1012 on the outer shell 200, the opening angle of the cover 101 can be effectively limited. Of course, the angle of the cover 101 when opened can also be set by setting the angle of the cover 101 when abutting against the limiting block 1012.

[0450] As shown in FIG. 2 and FIG. 16, in some embodiments, an external power supply port 217 is further provided on the same side of the pull rod 203 on the outer shell 200, and when the cover 101 is in the open position, the external power supply port 217 is located below the end of the cover 101. The external power supply port 217 can be electrically connected to an external power supply such as a mains power supply or a solar power supply system. Since the external power supply will have a wire harness when the external power supply connector is connected, especially when the wire harness is connected from high to low to the power conversion device, it will hinder the opening of the cover 101. In the present application, the external power supply port 217 is arranged below the end of the cover 101, which is beneficial to providing more space for the wire harness of the external power supply to move at the end of the cover 101.

[0451] As shown in FIG. 2 and FIG. 16, the present application further comprises a power conversion device comprising an outer shell 200, a pull rod 203 and a cover 101. The outer shell 200 is provided with a battery compartment 100 having an opening, the battery compartment 100 is configured to accommodate a battery pack 300, and the outer shell 200 is provided with an inverter assembly, which can be electrically connected to the battery pack 300 and can convert the electrical energy of the battery pack 300 to discharge externally and / or convert external electrical energy to charge the battery pack 300. The pull rod 203 is connected to the outer shell 200 and can be extended or retracted along the height direction of the power conversion device. The cover 101 is hinged to the outer shell 200 and can be pivoted relative to the outer shell 200 to close or open the opening of the battery compartment 100, and the cover 101 has a avoiding part 126, when the cover 101 is in the closed position or the open position, the pull rod 203 can pass through the avoiding part 126 to make the extension and retraction movement. Among them, the cover 101 is provided with an abutting surface 1011, and the outer shell 200 is provided with a limiting block 1012, and when the cover 101 is in the open position, the abutting surface 1011 abuts against the limiting block 1012. Through the abutting cooperation of the abutting surface 1011 on the cover 101 and the limiting block 1012 on the outer shell 200, the opening angle of the cover 101 can be effectively limited. Of course, the angle of the cover 101 when it is opened can also be set by setting the angle of the cover 101 when it abuts against the limiting block 1012.

[0452] As shown in FIG. 6, FIG. 24 and FIG. 25, in some embodiments, the application also provides a bidirectional energy storage power supply, which comprises a battery pack and an inverter device. The battery pack is detachably mounted on the inverter device, and the inverter device is capable of converting external alternating current to charge the battery pack and / or converting the power of the battery pack to supply external power. The inverter device comprises two handles 202. The inverter device 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 two first-specification battery packs are installed and when one second-specification battery pack is installed are both located on the symmetry plane 235 of the two handles 202, so that the center of gravity 234 of the bidirectional energy storage power supply before and after the installation of the battery pack is relatively concentrated, and the bidirectional energy storage power supply will not fall over during daily use and battery pack installation.

[0453] It should be noted that the above-mentioned center of gravity 234 located on the symmetry plane 235 of the two handles 202 can be understood as the center of gravity 234 when two first-specification battery packs are installed and the center of gravity 234 when one second-specification battery pack is installed can be 0.1 cm to 1 cm away from the symmetry plane 235 of the two handles 202 in the horizontal plane.

[0454] As shown in FIG. 6, in some embodiments, the inverter device has a center plane 229 in the up-down direction, the vertical distance from the center plane 229 to the uppermost end of the inverter device is equal to the vertical distance from the center plane 229 to the lowermost end of the inverter device. The bottom plate 108 of the battery compartment 100 is configured to support the battery pack, and the bottom plate 108 is located below the center plane 229. The bottom plate 108 of the battery compartment 100 used to support the battery pack is arranged below the center plane 229, so that the battery pack can be installed and supported in the inverter device at a lower position, and the center of gravity 234 of the entire bidirectional energy storage power supply after the installation of the battery pack is lower.

[0455] As shown in FIG. 6, in some embodiments, the inverter device further comprises a battery compartment 100 for installing the battery pack, and the height of the center of gravity 234 of the bidirectional energy storage power supply is below the center plane 229 in both the state without installing the battery pack and the state with installing the battery pack.

[0456] As shown in FIG. 24 and FIG. 25, in some embodiments, the inverter device further comprises a battery compartment 100 for installing the battery pack, and the two corresponding side plates of the battery compartment 100 are both provided with electrical connection terminals capable of electrically connecting with the first-specification battery pack and the second-specification battery pack. The electrical connection terminals on the two side plates are symmetrically distributed with respect to the symmetry plane 235 of the two handles 202. The electrical connection terminals for electrically connecting with 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, fully considering the design and layout of the center of gravity 234.

[0457] As shown in FIGS. 6, 8, 10, 24 and 25, in some embodiments, the second-specification battery pack is provided with two output terminals, one of which is electrically connected to one of the electrical connection terminals on the two side plates, and the other of which is electrically connected to the other of the electrical connection terminals on the two side plates. The second-specification battery pack can discharge externally with the two output terminals or charge itself with the two output terminals.

[0458] As shown in FIGS. 6, 8, 10, 24 and 25, in some embodiments, the two electrical connection terminals are symmetrically distributed substantially with respect to the symmetry plane 235 of the two handles 202. It should be noted that the electrical connection terminals in the present application are functionally equivalent to the second terminals 119.

[0459] As shown in FIG. 8, in some embodiments, the inverter device includes an inverter circuit board, which is located below the battery pack when the inverter device is installed on the battery pack. In this way, the inverter circuit board is arranged below the battery pack to facilitate the taking and placing of the battery pack from above the inverter device.

[0460] As shown in FIGS. 16 and 20, in some embodiments, the inverter device is provided below with a plurality of walking wheels 218 capable of supporting the walking of the inverter device, for supporting the movement of the inverter device. Further, the walking wheels 218 are provided in four, respectively at the four corners of the bottom of the inverter device.

[0461] As shown in FIGS. 6, 24 and 25, the present application also provides a storage energy bidirectional power supply, which includes a battery pack and an inverter device. The battery pack is detachably installed on the inverter device, and the inverter device is capable of converting external alternating current to charge the battery pack and / or converting the electrical energy of the battery pack to supply power externally. The inverter device includes two handles 202. The inverter device allows the installation of two first-specification battery packs or one second-specification battery pack. The center of gravity 234 of the storage energy bidirectional power supply when installing two first-specification battery packs and the center of gravity 234 when installing one second-specification battery pack are both substantially located on the symmetry plane 235 of the two handles 202. The battery pack can be detached from the inverter device to supply power to other tools. The inverter device, while meeting the installation of first-specification battery packs and second-specification battery packs, can also detach the battery pack from the inverter device to supply power to other tools, realizing the multi-purpose function of the battery pack. The features of the battery pack in the present application are functionally equivalent to the battery pack 300.

[0462] In some embodiments, the inverter device further includes a battery compartment 100 for installing the battery pack. The two corresponding side plates of the battery compartment 100 are each provided with an electrical connection terminal capable of being electrically connected to the first-specification battery pack and the second-specification battery pack. The electrical connection terminals on the two side plates are symmetrically distributed substantially with respect to the symmetry plane 235 of the two handles 202.

[0463] In some embodiments, the inverter device comprises an inverter circuit board, when the battery pack is mounted on the inverter device, the inverter circuit board is located below the battery pack, and the inverter circuit board is arranged below the battery pack in order to facilitate the taking and placing of the battery pack from above the inverter device.

[0464] As shown in FIG. 6 and FIG. 8, the application further provides a power conversion device configured to be electrically connected with a battery pack, the power conversion device comprises an inverter assembly, the battery pack is detachably mounted on the inverter device, the inverter assembly is capable of converting external alternating current to charge the battery pack and / or converting the power of the battery pack to supply power to the outside, and the power conversion device comprises two handles 202. The power conversion device allows the installation of two battery packs of a first specification or one battery pack of a second specification, and the center of gravity 234 of the power conversion device when installing two battery packs of the first specification and the center of gravity 234 of the power conversion device when installing one battery pack of the second specification are both located on the symmetry plane 235 of the two handles 202. Wherein, the power conversion device has a center plane 229 in the up-down direction, the vertical distance between the center plane 229 and the uppermost end of the inverter device is equal to the vertical distance between the center plane 229 and the lowermost end of the inverter device, and the bottom plate of the battery compartment 100 is configured to support the battery pack and is located below the center plane 229. Such arrangement makes the center of gravity 234 of the power conversion device lower and more stable.

[0465] Further, the power conversion device of the application allows the insertion of one large battery pack with a relatively large volume or the insertion of two small battery packs with a relatively small volume, and when one large battery pack or two small battery packs are inserted, the center of gravity 234 of the power conversion device as a whole is also located on the symmetry plane 235 of the two handles 202.

[0466] As shown in FIG. 8, the application also provides a bidirectional energy storage power supply, which includes an outer housing 200, an electric cell 301, an inverter module, a walking wheel 218, a pull rod 203, and a support 219. The electric cell 301 is located in the outer housing 200. The inverter module is arranged in the outer housing 200, and the inverter module can convert the electric energy of the electric cell 301 and supply power to the outside and / or convert the external electric energy and charge the electric cell 301. The walking wheel 218 is arranged in the outer housing 200, and the walking wheel 218 is configured to support the bidirectional energy storage power supply to walk. The pull rod 203 is connected to the outer housing 200, and when the pull rod 203 is pulled, the bidirectional energy storage power supply can move on the ground in an inclined manner through the walking wheel 218. The support 219 is connected to the bottom of the outer housing 200, and when the bidirectional energy storage power supply is placed horizontally on the ground, the support 219 supports the entire bidirectional energy storage power supply on the ground and the walking wheel 218 is not in contact with the ground. The movement of the bidirectional energy storage power supply can be supported by the wheels, so that the operator can drag the bidirectional energy storage power supply to the specified position according to the use requirement. After moving to the specified position, the support 219 can support the bidirectional energy storage power supply on the ground, and the walking wheel 218 can be away from the ground, reducing the bearing pressure of the walking wheel 218 and prolonging the service life of the walking wheel 218.

[0467] As shown in FIG. 13 and FIG. 14, 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 219, so as to ensure that the walking wheel 218 is not in contact with the ground when the support 219 supports the entire bidirectional energy storage power supply on the ground.

[0468] In some embodiments, the bottom of the outer housing 200 is provided with a limiting portion 2191 capable of limiting the movement of the support 219, and the support 219 is at least partially located in the limiting portion 2191, which plays the role of installation positioning and movement limiting of the support 219.

[0469] As shown in FIG. 13, FIG. 14, FIG. 23, FIG. 24, and FIG. 27-28, in order to facilitate the operator to switch the energy storage bidirectional power supply from the inclined state (towing state) to the horizontal state, in some embodiments, the application further provides an auxiliary support 230 at the bottom of the outer shell 200, which is at least partially located between the walking wheel 218 and the support 219 along the direction perpendicular to the axis of the walking wheel 218. Since the walking wheel 218 and the support 219 are at a certain distance, the auxiliary support 230 is installed between the walking wheel 218 and the support 219, so that when the entire energy storage bidirectional power supply is switched from the inclined state to the horizontal state by moving the pull rod 203, the auxiliary support 230 can contact the ground and generate friction earlier than the support 219. Specifically, when the user pulls the energy storage bidirectional power supply, in order to save effort, the user will adjust the center of gravity of the entire energy storage bidirectional power supply to be located or approximately located directly above the walking wheel, at this time, the gravity of the energy storage bidirectional power supply is almost or entirely borne by the walking wheel (as shown in FIG. 27), that is, the pull rod almost does not exert downward pressure on the user's hand, and the user only needs to exert horizontal force on the pull rod to pull the energy storage bidirectional power supply to move. When the user switches the energy storage bidirectional power supply from the inclined state (towing state) to the horizontal state, the center of gravity will move away from the user and gradually away from the walking wheel. At this time, as shown in FIG. 28, the gravity G1 has a first component F1 that makes the energy storage bidirectional power supply rotate and another component F2 that is approximately directed to the wheel (the direction of F2 is from the center of gravity of the power supply to the contact point of the walking wheel 218 and the ground), since the walking wheel 218 can only provide vertical upward support force to the energy storage bidirectional power supply, the force F2 can generate horizontal acceleration of the power supply, that is, the energy storage bidirectional power supply will generate horizontal displacement. After the auxiliary support 230 contacts the ground, the ground can not only provide vertical upward support force to the auxiliary support 230, but also generate horizontal friction force, which overcomes the driving force of the above-mentioned force F2 to drive the power supply to move horizontally, so that the power supply does not generate horizontal movement, until the energy storage bidirectional power supply returns to the horizontal state.

[0470] Further, when the energy storage bidirectional power supply is horizontally placed 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.

[0471] As shown in FIG. 14, in some embodiments, the projection of the auxiliary support 230 and the projection of the walking wheel 218 at least partially overlap along the direction perpendicular to the axis of the walking wheel 218.

[0472] As shown in FIG. 15, in some embodiments, the outer housing 200 comprises a bottom plate and a side plate arranged around the bottom plate, and the walking wheels 218 are located at the junction of the bottom plate and the side plate to facilitate the operator to tilt the energy storage bidirectional power supply, so that the walking wheels 218 are in contact with the ground in a relatively fast manner, facilitating dragging.

[0473] As shown in FIG. 15, in some embodiments, the walking wheels 218 are provided in two, and the two walking wheels 218 are respectively located on both sides of the pull rod 203. By arranging the two walking wheels 218 on both sides of the pull rod 203, two walking wheels 218 for supporting walking can be provided on both sides of the pull rod 203 and at the bottom of the energy storage bidirectional power supply, which can prevent uneven force from being generated on both sides of the pull rod 203 when the pull rod 203 is pulled, and help the energy storage bidirectional power supply to walk stably on the ground.

[0474] As shown in FIG. 15, in some embodiments, the support 219 is provided in multiple, and the multiple supports 219 are arranged at the edges of the bottom of the outer housing 200. The arrangement of the multiple supports 219 enables the energy storage bidirectional power supply to be more stable when placed horizontally.

[0475] As shown in FIGS. 13 and 14, the present application also provides an energy storage bidirectional power supply, which comprises an outer housing 200, a battery compartment 100, an inverter module, a walking wheel 218, a pull rod 203, and a support 219. The battery compartment 100 is at least partially located in the outer housing 200, and the battery compartment 100 is configured to detachably assemble a battery pack 300. The inverter module is arranged in the accommodation space between the outer housing 200 and the battery compartment 100, and the inverter module can at least convert external electric energy and charge the battery pack 300. The walking wheel 218 is arranged on the outer housing 200, and the walking wheel 218 is configured to support the energy storage bidirectional power supply to walk. The pull rod 203 is connected to the outer housing 200, and when the pull rod 203 is pulled, the energy storage bidirectional power supply can move on the ground in an inclined manner through the walking wheel 218. The support 219 is connected to the bottom of the outer housing 200, and when the energy storage bidirectional power supply is placed horizontally on the ground, the support 219 supports the energy storage bidirectional power supply on the ground and the walking wheel 218 does not contact the ground.

[0476] As shown in FIGS. 13 and 14, in some embodiments, when the energy storage bidirectional 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.

[0477] As shown in FIG. 5, in some embodiments, a first water leakage hole is arranged on the battery compartment 100, a second water leakage hole is arranged on the outer housing 200, and a water guide pipe 228 is connected between the first water leakage hole and the second water leakage hole to guide the liquid falling into the battery compartment 100 out of the battery compartment 100, so as to prevent damage to the battery pack 300 and the like.

[0478] As shown in FIG. 13 and FIG. 14, an energy storage bidirectional power supply includes a housing 200, a battery compartment 100, an inverter module, a walking wheel 218, and a support 219. The battery compartment 100 is at least partially located in the housing 200, and the battery compartment 100 is configured to detachably assemble a battery pack 300. The inverter module is disposed in a containing space between the housing 200 and the battery compartment 100, and the inverter module is at least capable of converting external electric energy and charging the battery pack 300. The walking wheel 218 is disposed on the housing 200, and the walking wheel 218 is configured to support the energy storage bidirectional power supply to walk. The energy storage bidirectional power supply is capable of moving on the ground in an inclined manner through the walking wheel 218 under the dragging of a trailer (such as a riding mower, an all-terrain vehicle, etc.). The support 219 is connected to the bottom of the housing 200, and when the energy storage bidirectional power supply is placed horizontally on the ground, the support 219 supports the energy storage bidirectional power supply on the ground, and the walking wheel 218 does not contact the ground.

[0479] As shown in FIG. 20, the present application also provides a power conversion device, which includes a housing 200, a battery compartment 100, an inverter module, and a plurality of walking wheel assemblies. The battery compartment 100 is at least partially located in the housing 200, and the battery compartment 100 is configured to detachably assemble a battery pack 300. The inverter module is disposed in a containing space between the housing 200 and the battery compartment 100, and the inverter module is at least capable of converting external electric energy and charging the battery pack 300. The plurality of walking wheel assemblies are configured to support the power conversion device to walk on the ground, and each walking wheel assembly includes a walking wheel 218 and a walking bracket for mounting the walking wheel 218, and the walking bracket includes a bracket connecting portion 236 capable of being connected to the bottom plate of the housing 200. Wherein, in the horizontal direction parallel to the bottom plate of the housing 200, the inverter module is located between the plurality of bracket connecting portions 236. Such arrangement helps to reserve a position on the bottom plate of the housing 200 for connecting the bracket connecting portion 236, so as to prevent the inverter module located on the other side of the bottom plate from interfering with the installation of the walking wheel assembly.

[0480] As shown in FIG. 20 and FIG. 21, in some embodiments, the bottom plate of the housing 200 is provided with a bottom plate connecting portion matched 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 capable of detachably matching with the bracket connecting portion 236. The bracket connecting portion 236 and the bottom plate connecting portion are connected by plug-in, thereby realizing the installation and fixation of the walking wheel assembly on the bottom of the housing 200.

[0481] As shown in FIG. 20 and FIG. 21, in some embodiments, in order to achieve stable installation of the walking wheel assembly on the outer shell 200 and prevent the walking wheel assembly from easily detaching from the bottom plate of the outer shell 200, a recess 2182 is arranged along the circumference of the protrusion 2181, a semicircular clasp 2183 is arranged around the recess 2182, and the semicircular clasp 2183 is at least partially located outside the recess 2182. The semicircular clasp 2183 is an elastic clasp. In some embodiments, the caliber of the groove 237 extends in the up-down direction of the power conversion device, and the caliber gradually increases from top to bottom. When installing, as the protrusion 2181 gradually inserts into the groove 237, the semicircular clasp 2183 on the protrusion 2181 is gradually squeezed and clamped with the inner wall of the groove 237 due to the gradually shrinking caliber of the groove 237, and the semicircular clasp 2183 is gradually clamped with the protrusion 2181 and generates a friction force between the semicircular clasp 2183, the protrusion 2181 and the groove 237, which can more stably install the walking wheel assembly on the bottom plate of the outer shell 200.

[0482] It should be noted that when the protrusion is arranged on the support connecting portion and the groove is arranged on the walking wheel, the caliber of the groove is gradually narrowed from top to bottom, and when installing, the groove on the walking wheel is moved to the protrusion of the support connecting portion and the two are inserted and matched.

[0483] In the present application, the walking wheel assembly includes at least two walking wheels 218 arranged on the bottom of the energy storage bidirectional power supply or the power conversion device.

[0484] As shown in FIG. 19 and FIG. 20, the present application also provides an energy storage bidirectional power supply, which includes an outer shell 200, a battery compartment 100, an inverter module and a plurality of walking mechanisms. The battery compartment 100 is at least partially located in the outer shell 200, and the battery compartment 100 is configured to detachably assemble a battery pack 300. The inverter module is arranged in the accommodation space between the outer shell 200 and the battery compartment 100, and the inverter module can at least convert external power and charge the battery pack 300. The plurality of walking mechanisms are configured to support the energy storage bidirectional power supply to walk on the ground, and each walking mechanism includes a walking connecting portion for connecting with the bottom plate of the outer shell 200. In the horizontal direction parallel to the bottom plate of the outer shell 200, the inverter module is located between the plurality of walking connecting portions. Such arrangement helps to reserve a position for the walking connecting portion on the bottom plate of the outer shell 200 to prevent the inverter module located on the other side of the bottom plate from interfering with the installation of the walking wheel assembly.

[0485] Referring to Figures 1 and 2, in some embodiments, a vent for heat dissipation of the inverter module is further 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.

[0486] 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.

[0487] As shown in Figures 19 and 20, 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 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.

[0488] 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.

[0489] 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.

[0490] As shown in FIG. 11, the application also provides a power conversion device, which comprises a shell, a battery pack and an inverter module. The battery pack is detachably mounted on the shell. The inverter module is capable of converting the electric energy of the battery pack to discharge externally and / or converting the external electric energy to charge the battery pack. The shell is provided with a heat dissipation air vent, and the heat dissipation air vent is provided with a protective net assembly 232 capable of covering the heat dissipation air vent. The protective net assembly 232 comprises first and second protective nets 2321 and 2322 with different mesh sizes. By arranging two layers of protective nets with different mesh sizes, foreign matters can be effectively prevented from entering the shell, the components in the shell are protected, and the service life is prolonged.

[0491] As shown in FIG. 11 and FIG. 12, 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 pasting. In some embodiments, the accommodating portion 233 of the outer shell 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-in installation on the outer shell 200, which is simple and fast. 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 to one piece and then inserted into the slot 2332 for installation.

[0492] 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 circular hole, the mesh size is the diameter of the circular hole. If the mesh of the first protective net 2321 is an irregular hole, the mesh size is the diameter of the outer contour circle of the hole.

[0493] In some embodiments, both sides of the shell are provided with heat dissipation air vents, each of which is provided with a protective net assembly 232, and the inverter module is located between the corresponding heat dissipation air vents.

[0494] As shown in FIG. 11, in some embodiments, the shell is provided with an accommodating portion 233 capable of accommodating the protective net assembly 232. The accommodating portion 233 is formed by recessing inward from the outer surface of the shell, which plays a limiting role in the installation of the protective net assembly 232.

[0495] As shown in FIG. 11 and FIG. 12, in some embodiments, the heat dissipation air vent is arranged in the accommodating portion 233, and the accommodating portion 233 is formed with a third protective net 2331, which is an air inlet grille.

[0496] In some embodiments, the second protective net 2322 is a grid structure with large mesh to facilitate air intake and also to protect and support the honeycomb net structure. The first protective net 2321 is a honeycomb net structure with small mesh to effectively prevent small flying insects and impurities from entering the shell.

[0497] As shown in FIG. 11, the application also provides a power conversion device, comprising a shell, a battery pack, an inverter module and a moving assembly. The battery pack is detachably installed on the shell. The inverter module is capable of converting the electric energy of the battery pack to discharge externally and / or converting the external electric energy to charge the battery pack. The shell is provided with a heat dissipation air port, and the heat dissipation air port is provided with a protective net assembly 232 capable of covering the heat dissipation air port. The protective net assembly 232 comprises a first protective net 2321 and a second protective net 2322 with different mesh sizes. The moving assembly is configured to support the movement of the entire power conversion device.

[0498] In some embodiments, the moving assembly is a walking wheel 218 arranged at the bottom of the shell, which is used to support the walking of the entire power conversion device.

[0499] As shown in FIG. 11, the application also provides a bidirectional power supply, comprising a shell, a plurality of battery cells 301 and an inverter module. The plurality of battery cells 301 are arranged in the shell. The inverter module is capable of converting the electric energy of the plurality of battery cells 301 to discharge externally and / or converting the external electric energy to charge the plurality of battery cells 301. The shell is provided with symmetrically arranged heat dissipation air ports, and the heat dissipation air ports are provided with a protective net assembly 232 capable of covering the heat dissipation air ports. The protective net assembly 232 comprises a first protective net 2321 and a second protective net 2322 with different mesh sizes.

[0500] The application is not limited to the above specific embodiments. Those skilled in the art can easily understand that the application has many alternatives without departing from the principles and scope of the application. The protection scope of the application is subject to the contents of the claims.

Claims

1. An energy storage bidirectional power supply, characterized by, include: Battery pack: A battery compartment is configured to house the battery pack, and the battery compartment is provided with a first vent capable of exchanging heat between the interior and exterior of the battery compartment. The outer casing, in which the battery compartment is at least partially housed, has a second vent provided on it; A power conversion circuit board is configured to convert and output the power of the battery pack. The power conversion circuit board is located in the housing space formed by the battery compartment and the outer shell. The power conversion circuit board in the housing space can exchange heat with the external airflow through the second vent. 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.

2. The energy storage bidirectional power converter of claim 1, wherein: The battery pack includes a battery casing and battery cells disposed within the battery casing. The battery casing is provided with a third vent for dissipating heat from the battery cells inside. 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.

3. The energy storage bidirectional power supply of claim 1 or 2, wherein: The first vent is provided with a first cooling fan for dissipating heat from the inside of the battery pack. In the ventilation direction of the second vent, the projection of the first cooling fan and the projection of the second vent at least partially overlap.

4. The energy storage bidirectional power supply of claim 3, wherein: The accommodating space is provided with a second cooling fan for dissipating heat from the power conversion circuit board. In the ventilation direction of the second vent, the projection of the second cooling fan at least partially overlaps with the projection of the second vent.

5. The energy storage bidirectional power supply of claim 4, wherein: In the ventilation direction of the second vent, the projection of the power conversion circuit board at least partially overlaps with the projection of the second vent.

6. The energy storage bidirectional power supply of claim 1 or 5, wherein: The accommodating space includes: a first space, disposed on one side of the battery compartment, wherein a first circuit board is disposed in the first space; The second space is located on the opposite side of the battery compartment from the first space, and the second space is provided with a second circuit board; A third space is provided between the first space and the second space, and the power conversion circuit board is located in the third space; The first space, the second space, and the third space can all exchange heat with the external gas through the second vent.

7. The energy storage bidirectional power converter of claim 6, wherein: The first circuit board includes a display panel configured to display at least the power information of the battery pack, and the second circuit board includes a control circuit board configured to control the power conversion circuit board to perform power conversion.

8. A power conversion device, characterized by, include: outer shell; A battery compartment, at least partially housed within the housing, is capable of accommodating a battery pack that can be detached from the power conversion device to power power tools. An inverter module is disposed within the housing space enclosed by the battery compartment and the outer shell. The inverter module is capable of converting the electrical energy of the battery pack and discharging it to the outside and / or converting external electrical energy into charging the battery pack. The first vent is arranged on the battery compartment and is used for heat dissipation of the battery pack, the second vent is arranged on the shell and is used for heat dissipation of the accommodating space, the first vent is arranged adjacent to the second vent, and the projection of the first vent at least partially overlaps the projection of the second vent in the ventilation direction of the second vent.

9. The power conversion device of claim 8, wherein: The battery compartment comprises a first side plate and a second side plate arranged correspondingly, and the first side plate and the second side plate are both provided with the first vent; The outer shell comprises a third side plate and a fourth side plate arranged correspondingly, and the third side plate and the fourth side plate are both provided with the second vent; In the ventilation direction of the second vent, the projection of the first vent on the first side plate at least partially overlaps the projection of the second vent on the adjacent third side plate; In the ventilation direction of the second vent, the projection of the first vent on the second side plate at least partially overlaps the projection of the second vent on the adjacent fourth side plate.

10. The power conversion device of claim 9, wherein: The first vent on the first side plate and the first vent on the second side plate are both provided with a first heat dissipation fan.

11. The power conversion device of claim 10, wherein: The first heat dissipation fan on the first side plate and the second side plate is configured to exhaust air outside the battery compartment.

12. The power conversion device of claim 10, wherein: Both ends of the battery pack are provided with a first terminal electrically connected to the outside, and the first side plate and the second side plate are both provided with a second terminal electrically connected to the first terminal, and the second terminal is located above the first vent, and the airflow flowing through the first terminal and the second terminal can be exhausted from the power conversion device through the first vent and the second vent.

13. The power conversion device of claim 12, wherein: The battery compartment is provided with a compartment cover, and a gap for airflow is arranged between the compartment cover and the battery compartment, and the airflow entering the battery compartment through the gap can at least partially flow through the first terminal and the second terminal and be exhausted from the power conversion device through the first vent and the second vent.

14. The power conversion device according to claim 9 or 12, characterized by: The accommodating space comprises: A first space is arranged on one side of the battery compartment, and the first space is provided with a first circuit board; A second space is arranged on the other side of the battery compartment opposite to the first space, and the second space is provided with a second circuit board; A third space is arranged between the first space and the second space, and the inverter module is located in the third space; The first space, the second space and the third space are located between the third side plate and the fourth side plate, and the airflow entering the outer shell through the second vent of the third side plate can flow through the first space, the second space and the third space and then flow out of the outer shell through the second vent of the fourth side plate.

15. The power conversion device of claim 14, wherein: The first circuit board is arranged in the first space and extends along the ventilation direction of the second vent; The second circuit board is arranged in the second space and extends along the ventilation direction of the second vent; The inverter module is arranged in the third space and extends along the ventilation direction of the second vent.

16. The power conversion device of claim 15, wherein: The second heat dissipation fan at one end of the inverter module is configured to blow air flow to the inverter module, and the second heat dissipation fan at the other end of the inverter module is configured to extract the air flow passing through the inverter module.

17. The power conversion device of claim 16, wherein: In the ventilation direction of the second ventilation opening, the projection of the inverter module at least partially overlaps the projection of the second ventilation opening on the third side plate and the projection of the second ventilation opening on the fourth side plate.

18. The power conversion device of claim 13, wherein: The third heat dissipation fan on the third side plate and the fourth side plate is arranged corresponding to the second ventilation opening, and the third heat dissipation fan can discharge the hot air flow in the battery compartment and the containing space to the power conversion device.

19. The power conversion device of claim 15 or 16, wherein: In the ventilation direction of the second ventilation opening, the projection of any one of the first ventilation opening on the first side plate, the first ventilation opening on the second side plate, the second ventilation opening on the third side plate, and the second ventilation opening on the fourth side plate at least partially overlaps the projection of each of the other three.

20. The power conversion device of claim 9 or 12 or 15, wherein: The first terminal at one end of the battery pack can supply power to the second terminal on the first side plate, and the first terminal at the other end of the battery pack can supply power to the second terminal on the second side plate, and the inverter module can receive the power supply of the second terminal on the first side plate and the second terminal on the second side plate and convert the power to discharge externally.

21. The power conversion device of claim 12, wherein: The first terminal at one end of the battery pack is electrically connected to the second terminal on the first side plate, and the first terminal at the other end of the battery pack is electrically connected to the second terminal on the second side plate, and the inverter module can receive the power supply and convert it to the power for charging the battery pack.

22. The power conversion device of claim 12, wherein: It includes:

23. An outdoor work vehicle system characterized by a battery pack; a power conversion device, comprising: an outer shell body provided with an external power supply interface, the external power supply interface can be electrically connected with an external power supply; a battery compartment, at least partially contained in the outer shell body, the battery compartment can contain the battery pack; an inverter module, arranged in the containing space surrounded by the battery compartment and the outer shell body, the inverter module can receive the power of the external power supply and convert it to power supply for the battery pack; wherein the battery compartment is provided with a first ventilation opening for heat dissipation of the battery pack, and the shell body is provided with a second ventilation opening for heat dissipation of the containing space, and in the ventilation direction of the second ventilation opening, the projection of the first ventilation opening at least partially overlaps the projection of the second ventilation opening; an outdoor work vehicle, which can be connected with the power conversion device, when the power conversion device converts the power of the external power supply and charges the energy device on the outdoor work vehicle, the power conversion device stops charging the battery pack. It includes:

24. An outdoor work vehicle system characterized by a power conversion device, comprising: an outer shell body provided with an external power supply interface, the external power supply interface is used for electrically connecting with an external power supply; a battery compartment, at least partially contained in the outer shell body, the battery compartment can contain a battery pack; ​ An inverter module is arranged in the accommodating space formed by the battery compartment and the shell, and the inverter module is electrically connected with the external power supply interface; The battery compartment is provided with a first air vent for heat dissipation of the battery pack, and the shell is provided with a second air vent for heat dissipation of the accommodating space. In the air flow direction of the second air vent, the projection of the first air vent at least partially overlaps the projection of the second air vent. An outdoor work vehicle can be connected with the power conversion device, and the power conversion device can convert commercial power into electric energy for charging an energy device on the outdoor work vehicle.

25. The outdoor work vehicle system of claim 24, characterized in that: The battery pack can be detached from the power conversion device and used to power the outdoor work vehicle.

26. An energy storage bidirectional power supply, characterized by, The battery compartment is configured to be detachably assembled with the battery pack, and the battery compartment includes a first air inlet and a first air outlet. A first air flow channel is formed between the battery pack and the battery compartment. The path of the first air flow channel includes: the air flow entering the battery compartment through the first air inlet, and then entering the battery pack, and then being discharged from the battery compartment through the first air outlet. A shell is arranged outside the battery compartment. The shell includes a second air inlet and a second air outlet. A second air flow channel is formed between the battery compartment and the shell. An inverter circuit board is configured to convert the electric energy of the battery pack into external discharge and / or convert external electric energy into charging of the battery pack. The inverter circuit board is located between the battery compartment and the shell and at least partially located in the second air flow channel. The air flow entering the second air flow channel through the second air inlet passes through the inverter circuit board and is then discharged from the shell through the second air outlet. The air flow discharged from the first air outlet can be discharged from the shell through the second air outlet. The battery pack includes a battery pack air inlet and a battery pack air outlet. The air flow in the first air flow channel enters the battery pack through the battery pack air inlet, passes through the battery cell in the battery pack, and is then discharged from the battery pack through the battery pack air outlet and the first air outlet.

27. The energy storage bidirectional power supply of claim 26, wherein: The battery compartment includes a first side plate and a second side plate arranged correspondingly. The first side plate and the second side plate are both provided with a first air outlet. The first air outlet is provided with a heat dissipation fan for discharging air outside the battery compartment. The battery pack is located between the two first air outlets.

28. The energy storage bidirectional power supply of claim 26 or 27, wherein: 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 in the battery compartment, the first terminal and the second terminal are electrically connected. The air flow entering the battery compartment through the first air inlet passes through the first terminal and the second terminal and is then discharged through the first air outlet.

29. The energy storage bidirectional power supply of claim 26, wherein: In the assembly direction of the battery pack, the first terminal and the second terminal are located between the first air inlet and the first air outlet.

30. The energy storage bidirectional power supply of claim 29, wherein: The battery compartment is a accommodating cavity with an opening. The battery pack is detachably arranged in the accommodating cavity. The first air inlet is at least part of the opening.

31. The energy storage bidirectional power supply of claim 26 or 29, wherein: ​ 32. The energy storage bidirectional power supply of claim 26, wherein: The control circuit board capable of at least controlling the operation of the inverter circuit board is further arranged between the battery compartment and the outer shell, and the output circuit board capable of receiving power supply of at least one of the control circuit board and the inverter circuit board is arranged, and the air flow entering the second air flow passage 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 second air outlet of the outer shell.

33. The energy storage bidirectional power supply of claim 32, wherein: The battery compartment and the outer shell form an accommodation space, and the second air flow passage is at least partially located in the accommodation space, and the accommodation space comprises: a first space arranged on one side of the battery compartment, the control circuit board being located in the first space; a second space arranged on the other side of the battery compartment corresponding to the first space, the output circuit board being located in the second space; and a third space arranged between the first space and the second space, the inverter circuit board being located in the third space, the third space being located between the first space and the second space and below the battery compartment; The air flow entering the second air flow passage from the second air inlet flows through the control circuit board, the output circuit board and the inverter circuit board in the accommodation space and is discharged from the second air outlet.

34. The energy storage bidirectional power supply of claim 33, wherein: The outer shell comprises a third side plate and a fourth side plate arranged correspondingly, the second air inlet is arranged on the third side plate, the second air outlet is arranged 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.

35. The energy storage bidirectional power supply of claim 34, wherein: At least one of the second air inlet and the second air outlet is provided with a cooling fan.

36. The energy storage bidirectional power supply of claim 32 or 33, wherein: The battery pack is located above the inverter circuit board.

37. The energy storage bidirectional power supply of claim 26, wherein: The first air outlet is arranged adjacent to the second air outlet.

38. The energy storage bidirectional power supply of claim 32, wherein: The battery compartment comprises a first side plate and a second side plate arranged correspondingly, the first side plate and the second side plate are both provided with the first air outlet, the outer shell comprises a third side plate and a fourth side plate arranged correspondingly, the second air inlet is arranged on the third side plate, the second air outlet is arranged on the fourth side plate, and 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 the air outlet direction of the first air outlet.

39. The energy storage bidirectional power supply of claim 38, wherein: The first air outlet is arranged adjacent to the second air flow passage, and the first air outlet is provided with a flow guide member capable of guiding the air flow discharged from the first air outlet to the second air outlet.

40. The energy storage bidirectional power supply of claim 39, wherein: The flow guide member is a tubular structure or a plate structure.

41. The energy storage bidirectional power supply of claim 40, wherein: The flow guide member is provided with a wire harness limiting portion, 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 portion, and the wire harness is located outside the flow guide member.

42. The energy storage bidirectional power supply of claim 26, wherein: The battery compartment forms an accommodation cavity configured to accommodate two first-specification battery packs or one second-specification battery pack.

43. The energy storage bidirectional power supply of claim 26, wherein: The inverter circuit board is provided with inverter components, and the inverter components are located in the second air flow passage.

44. An energy storage bidirectional power supply, comprising: Comprise: a battery compartment configured to detachably accommodate a battery pack, the battery compartment comprising a first air inlet and a first air outlet for cooling airflow passing through, wherein the airflow entering the battery compartment through the first air inlet enters the battery pack and is discharged from the battery compartment through the first air outlet; an outer shell comprising a second air inlet and a second air outlet; an inverter module located between the battery compartment and the outer shell, the inverter module being configured to convert the electrical energy of the battery pack to external discharge and / or convert external electrical energy to charge the battery pack, wherein the airflow entering the outer shell through the second air inlet flows through the inverter module and is discharged from the outer shell through the second air outlet; wherein the airflow discharged from the first air outlet can be discharged from the outer shell through the second air outlet.

45. The energy storage bidirectional power supply of claim 44, wherein: The first air outlet and the second air outlet are arranged adjacent to each other, and a cooling fan is arranged adjacent to the first air outlet and the second air outlet, the cooling fan being configured to discharge the airflow in the battery compartment and between the battery compartment and the outer shell from the outer shell through the second air outlet.

46. The energy storage bidirectional power supply of claim 45, wherein: In the air outlet 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.

47. A power conversion device, characterized by comprising: a battery compartment configured to detachably accommodate a battery pack, the battery compartment comprising a first air inlet and a first air outlet, a first airflow channel being formed between the battery pack and the battery compartment, the path of the first airflow channel comprising: the airflow entering the battery compartment through the first air inlet entering the battery pack and being discharged from the battery compartment through the first air outlet; an outer shell arranged outside the battery compartment, the outer shell comprising a second air inlet and a second air outlet, a second airflow channel being formed between the battery compartment and the outer shell; an inverter circuit board configured to convert the electrical energy of the battery pack to external discharge or convert external electrical energy to charge the battery pack, the inverter circuit board being located between the battery compartment and the outer shell and at least partially located in the second airflow channel, wherein the airflow entering the second airflow channel through the second air inlet passes through the inverter circuit board and is discharged from the outer shell through the second air outlet; wherein the first air outlet is arranged adjacent to the second air outlet and the airflow discharged from the first air outlet can be discharged from the outer shell through the second air outlet.

48. A power conversion device, characterized by comprising: an outer shell provided with a battery compartment having an opening, the battery compartment being configured to accommodate a battery pack, the outer shell being provided with an inverter assembly capable of being electrically connected to the battery pack and capable of converting the electrical energy of the battery pack to external discharge and / or converting commercial power to charge the battery pack; a pull rod connected to the outer shell and capable of extending or retracting in the height direction of the power conversion device; a compartment cover hinged to the outer shell and capable of pivoting relative to the outer shell to close or open the opening of the battery compartment; In the retracted state of the pull rod, the maximum opening angle of the compartment cover is greater than 90° and less than or equal to 150°.

49. The power conversion device of claim 48, wherein: The height of the hinged position of the compartment cover and the outer shell is lower than the uppermost position of the pull rod.

50. The power conversion device of claim 48, wherein: The cover is provided with an abutting surface, and the shell body is provided with a limiting block, and the abutting surface is capable of abutting with the limiting block when the cover is in the open position.

51. The power conversion device of claim 48 or 49 or 50, wherein: The maximum opening angle of the cover relative to the horizontal plane is 120°.

52. The power conversion device of claim 48, wherein: The hinge assembly is further connected to the cover and the shell body, and comprises a first hinge part provided on the cover and a second hinge part provided on the shell body, and a connecting member connected between the first hinge part and the second hinge part, and the connecting member is provided with a damping member capable of acting between the first hinge part and the second hinge part.

53. The power conversion device of claim 52, wherein: The hinge assembly is provided on both sides of the pull rod.

54. The power conversion device of claim 53, wherein: The hinge assembly is connected to the opening of the battery compartment, and the height of the pull rod is higher than the height of the opening of the battery compartment.

55. The power conversion device of claim 48, wherein: The cover is made of transparent or translucent material.

56. The power conversion device of claim 48 or 55, wherein: The light transmittance of the cover is greater than or equal to 30% and less than or equal to 99%.

57. The power conversion device of claim 48, wherein: The cover is provided with a first sensing element, and the shell body is provided with a second sensing element capable of signal sensing with the first sensing element, and the first sensing element is capable of signal sensing with the second sensing element when the cover is in the closed position. The first sensing element is disconnected from the signal sensing with the second sensing element when the cover is in the open position.

58. A power conversion device, characterized by, The shell body is provided with a battery compartment with an opening, the battery compartment is configured to accommodate a battery pack, and the shell body is provided with an inverter assembly, the inverter assembly is capable of electrical connection with the battery pack and capable of converting the electrical energy of the battery pack to external discharge and / or converting external electrical energy to charge the battery pack. The pull rod is connected with the shell body and capable of extending or retracting along the height direction of the power conversion device. The cover is hinged to the edge of the opening of the battery compartment and capable of pivoting relative to the shell body to close or open the opening of the battery compartment, and the height of the pull rod is higher than the height of the opening of the battery compartment. The cover has a bypass portion. When the cover switches between the open position and the closed position, the cover can bypass the pull rod through the bypass portion. The cover is provided with an abutting surface, and the shell body is provided with a limiting block, and the abutting surface is capable of abutting with the limiting block when the cover is in the open position.

59. The power conversion device of claim 58, wherein: The power connector is provided on the same side of the pull rod and on the shell body, and the power connector is located below the end of the cover when the cover is in the open position.

60. The power conversion device of claim 58 or 59, wherein: The shell body is provided with a battery compartment with an opening, the battery compartment is configured to accommodate a battery pack, and the shell body is provided with an inverter assembly, the inverter assembly is capable of electrical connection with the battery pack and capable of converting the electrical energy of the battery pack to external discharge and / or converting external electrical energy to charge the battery pack.

61. A power conversion device, characterized by, The pull rod is connected with the shell body and capable of extending or retracting along the height direction of the power conversion device. The cover is hinged to the shell body and capable of pivoting relative to the shell body to close or open the opening of the battery compartment, and the cover has a bypass portion. ​ ​ When the cover is in the closed position or the open position, the pull rod can make extension and contraction movement through the avoiding part; The cover is provided with an abutting surface, and the shell body is provided with a limiting block; when the cover is in the open position, the abutting surface abuts against the limiting block.

62. An energy storage bidirectional power supply, comprising: Comprise A battery pack; an inverter device, the battery pack is detachably installed on the inverter device, the inverter device can convert external alternating current to charge the battery pack or convert the electric energy of the battery pack to supply power to the outside, the inverter device comprises two handles; The inverter device allows the installation of two first specification battery packs or one second specification battery pack, and the center of gravity of the energy storage bidirectional power supply when installing two first specification battery packs and the center of gravity when installing one second specification battery pack are both located on the symmetry plane of the two handles.

63. The energy storage bidirectional power supply of claim 62, wherein: The inverter device has a center plane in the up-down direction, the vertical distance from the uppermost end of the inverter device to the center plane is equal to the vertical distance from the lowermost end of the inverter device to the center plane, and the bottom plate of the battery compartment is configured to support the battery pack, and the bottom plate is located below the center plane.

64. The energy storage bidirectional power supply of claim 63, wherein: The inverter device further comprises a battery compartment for installing the battery pack, and the height of the center of gravity of the energy storage bidirectional power supply is below the center plane in the state of not installing the battery pack and in the state of installing the battery pack.

65. The energy storage bidirectional power supply of claim 62, wherein: The inverter device further comprises a battery compartment for installing the battery pack, and the two corresponding side plates of the battery compartment are both provided with an electric connection terminal capable of being electrically connected with the first specification battery pack and the second specification battery pack, and the electric connection terminals on the two side plates are symmetrically distributed with the symmetry plane of the two handles.

66. The energy storage bidirectional power supply of claim 65, wherein: The second specification battery pack is provided with two output terminals, one of which is electrically connected with one of the electric connection terminals on the two side plates, and the other is electrically connected with the other electric connection terminal.

67. The energy storage bidirectional power supply of claim 66, wherein: The two electric connection terminals are symmetrically distributed with the symmetry plane of the two handles.

68. The energy storage bidirectional power supply of claim 66, wherein: The inverter device comprises an inverter circuit board, and when the inverter device installs the battery pack, the inverter circuit board is located below the battery pack.

69. The energy storage bidirectional power supply of claim 66, wherein: The lower part of the inverter device is provided with a plurality of walking wheels capable of supporting the inverter device to walk.

70. An energy storage bidirectional power supply, comprising: Comprise A battery pack; An inverter device, the battery pack is detachably installed on the inverter device, the inverter device can convert external alternating current to charge the battery pack or convert the electric energy of the battery pack to supply power to the outside, the inverter device comprises two handles; The inverter device allows the installation of two first specification battery packs or one second specification battery pack, and the center of gravity of the energy storage bidirectional power supply when installing two first specification battery packs and the center of gravity when installing one second specification battery pack are both located on the symmetry plane of the two handles, Wherein, the battery pack can be detached from the inverter device to supply power to other tools.

71. The energy storage bidirectional power supply of claim 70, wherein: The inverter device further comprises a battery compartment for mounting the battery pack, two corresponding side plates of the battery compartment are each provided with an electrical connection terminal capable of being electrically connected with the first specification battery pack and the second specification battery pack, and the electrical connection terminals on the two side plates are symmetrically distributed with respect to the symmetry plane of the two handles.

72. The energy storage bidirectional power supply of claim 70, wherein: The inverter device comprises an inverter circuit board, which is located below the battery pack when the inverter device is mounted on the battery pack.

73. An electric power conversion device configured to be electrically connectable with a battery pack, characterized by The power conversion device comprises an inverter assembly, the battery pack is detachably mounted on the inverter device, and the inverter assembly is capable of converting external alternating current to charge the battery pack or converting the electrical energy of the battery pack to supply power to the outside, and the power conversion device comprises two handles. The power conversion device allows mounting of two first specification battery packs or one second specification battery pack, and the center of gravity of the power conversion device when mounting two first specification battery packs and the center of gravity of the power conversion device when mounting one second specification battery pack are both located on the symmetry plane of the two handles, wherein the power conversion device has a center plane in the up-down direction, the vertical distance from the uppermost end of the inverter device to the center plane is equal to the vertical distance from the lowermost end of the inverter device to the center plane, and the bottom plate of the battery compartment is configured to support the battery pack and is located below the center plane.

74. A power conversion device, characterized by It comprises: an outer shell; a battery compartment at least partially contained in the outer shell, the battery compartment being capable of containing a battery pack; a first functional area provided on one side of the battery pack, the first functional area being provided with at least a display panel capable of displaying state information of the power conversion device; a second functional area provided on the other side of the battery pack with respect to the first functional area, the second functional area being provided with at least an external power supply port capable of being electrically connected with an external power supply; an electrical energy conversion area provided between the first functional area and the second functional area and below the battery pack, the electrical energy conversion area being provided with an electrical energy conversion circuit board capable of receiving electrical energy transmitted by the external power supply port and converting the electrical energy to charge the battery pack or converting the electrical energy of the battery pack and outputting to the outside.

75. The power conversion device of claim 74, wherein: The first functional area is provided with a direct current output circuit board and an alternating current output circuit board, the direct current output circuit board is provided with a direct current output port, the display panel is electrically connected with the direct current output circuit board, and the alternating current output circuit board is provided with an alternating current output port.

76. The power conversion device of claim 75, wherein: The second functional area is provided with a control circuit board capable of controlling the operation of the electrical energy conversion circuit board and capable of obtaining the electrical energy converted by the electrical energy conversion circuit board.

77. The power conversion device of claim 76, wherein: The direct current output circuit board is electrically connected with the control circuit board and capable of transmitting the electrical energy of the control circuit board to the direct current output port; The alternating current output circuit board is electrically connected with the electrical energy conversion circuit board and capable of transmitting the electrical energy of the electrical energy conversion circuit board to the alternating current output port.

78. The power conversion device of claim 77, wherein: The outer shell and the battery compartment form a containing space, the first functional area, the second functional area and the electric energy conversion area are located in the containing space, and the outer shell is further provided with a heat dissipation air outlet capable of dissipating heat from the containing space.

79. The power conversion device of claim 74, wherein: The second functional area is further provided with an external output port capable of charging the outdoor work vehicle, and the external output port is electrically connected with the electric energy conversion circuit board.

80. The power conversion device of claim 74 or 75, wherein: The shell is further provided with a pull rod for moving the electric power conversion device, and the pull rod is arranged close to the second functional area.

81. The power conversion device of claim 74, wherein: The battery compartment comprises a fifth side plate and a sixth side plate arranged oppositely, and the outer shell comprises a seventh side plate and an eighth side plate arranged correspondingly, the first functional area is located between the fifth side plate and the seventh side plate, and the second functional area is located between the sixth side plate and the eighth side plate.

82. A power conversion device, characterized by, It comprises: an outer shell; an output circuit board assembly arranged on one side of the shell, the output circuit board assembly being connected with an output port capable of being connected with an external power consumption device; a control circuit board arranged on the other side of the shell relative to the output circuit board assembly; an inverter circuit board arranged between the output circuit board assembly and the control circuit board, the inverter circuit board being capable of converting external electric energy and supplying power to the control circuit board.

83. The power conversion device of claim 82, wherein: The output circuit board assembly comprises a direct-current output circuit board and an alternating-current output circuit board, the direct-current output circuit board being electrically connected with the control circuit board, and the alternating-current output circuit board being electrically connected with the inverter circuit board.

84. The power conversion device of claim 82, wherein: The outer shell is further provided with a pull rod for moving the electric power conversion device, and the pull rod is arranged close to the control circuit board.

85. The power conversion device of claim 82, wherein: The outer shell is further provided with an external output port capable of charging the outdoor work vehicle on the same side of the control circuit board, and the external output port is electrically connected with the inverter circuit board.

86. An energy storage bidirectional power supply, comprising: It comprises: an outer shell; an electric core located in the outer shell; an inverter module arranged in the outer shell, the inverter module being capable of converting electric energy of the electric core and supplying power to the outside or converting external electric energy and charging the electric core; a walking wheel arranged in the outer shell, the walking wheel being configured to support the energy storage bidirectional power supply to walk; a handle connected to the outer shell, when the handle is pulled, the energy storage bidirectional power supply can move on the ground in an inclined manner through the walking wheel; a support connected to the bottom of the outer shell, when the energy storage bidirectional power supply is placed horizontally on the ground, the support supports the entire energy storage bidirectional power supply on the ground and the walking wheel does not contact the ground.

87. The energy storage bidirectional power supply of claim 86, wherein: When the energy storage bidirectional power supply is placed horizontally on the ground, the lowest end of the walking wheel is higher than the lowest end of the support.

88. The energy storage bidirectional power supply of claim 86, wherein: The bottom of the outer shell is provided with a limiting portion capable of limiting the movement of the support, and the support is at least partially located in the limiting portion.

89. The energy storage bidirectional power supply of claim 86, wherein: It further comprises an auxiliary support arranged at the bottom of the outer shell, and the auxiliary support is at least partially located between the walking wheel and the support in the direction perpendicular to the axis of the walking wheel.

90. The energy storage bidirectional power supply of claim 89, wherein: When the energy storage bidirectional power supply is horizontally placed on the ground, the lowest end of the auxiliary support is lower than the lowest end of the walking wheel and higher than the lowest end of the support.

91. The energy storage bidirectional power supply of claim 89, wherein: In a direction perpendicular to the axis of the walking wheel, the projection of the auxiliary support at least partially overlaps the projection of the walking wheel.

92. The energy storage bidirectional power supply of claim 86, wherein: The outer shell comprises a bottom plate and a side plate arranged around the bottom plate, and the walking wheel is located at the junction of the bottom plate and the side plate.

93. The energy storage bidirectional power supply of claim 90, wherein: The walking wheel is provided with two, and the two walking wheels are respectively located on both sides of the handle.

94. The energy storage bidirectional power supply of claim 86, wherein: The support is provided with a plurality of, and a plurality of supports are arranged at the edge of the bottom of the outer shell.

95. An energy storage bidirectional power supply, comprising: It comprises: An outer shell; A battery compartment at least partially located in the outer shell, the battery compartment is configured to be detachably assembled with a battery pack; An inverter module arranged in the accommodation space between the outer shell and the battery compartment, the inverter module can at least convert external electric energy and charge the battery pack; A walking wheel arranged in the outer shell, the walking wheel is configured to support the energy storage bidirectional power supply to walk; A handle connected to the outer shell, when the handle is pulled, the energy storage bidirectional power supply can move on the ground in an inclined manner through the walking wheel; A support connected to the bottom of the outer shell, when the energy storage bidirectional power supply is horizontally placed on the ground, the support supports the energy storage bidirectional power supply on the ground and the walking wheel is not in contact with the ground.

96. The energy storage bidirectional power supply of claim 95, wherein: When the energy storage bidirectional power supply is horizontally placed on the ground, the distance between the walking wheel and the ground is greater than or equal to 5mm and less than or equal to 45mm.

97. The energy storage bidirectional power supply of claim 95, wherein: A first water leakage hole is arranged on the battery compartment, a second water leakage hole is arranged on the outer shell, and a flow guide pipe is connected between the first water leakage hole and the second water leakage hole.

98. An energy storage bidirectional power supply, comprising: It comprises: An outer shell; A battery compartment at least partially located in the outer shell, the battery compartment is configured to be detachably assembled with a battery pack; An inverter module arranged in the accommodation space between the outer shell and the battery compartment, the inverter module can at least convert external electric energy and charge the battery pack; A walking wheel arranged in the outer shell, the walking wheel is configured to support the energy storage bidirectional power supply to walk, and the energy storage bidirectional power supply can move on the ground in an inclined manner through the walking wheel; A support connected to the bottom of the outer shell, when the energy storage bidirectional power supply is horizontally placed on the ground, the support supports the energy storage bidirectional power supply on the ground and the walking wheel is not in contact with the ground.

99. A power conversion device, characterized by It comprises: An outer shell; A battery compartment at least partially located in the outer shell, the battery compartment is configured to be detachably assembled with a battery pack; An inverter module arranged in the accommodation space between the outer shell and the battery compartment, the inverter module can at least convert external electric energy and charge the battery pack; A plurality of walking wheel assemblies configured to support the power conversion device to walk on the ground, each walking wheel assembly comprises a walking wheel and a walking support for mounting the walking wheel, and the walking support comprises a support connecting part which can be connected to the bottom plate of the outer shell; The inverter module is located between the plurality of support connecting portions in a horizontal direction parallel to the bottom plate of the outer shell.

100. The power conversion device of claim 99, wherein: The bottom plate of the outer shell is provided with a bottom plate connecting portion that is mounted in cooperation with the support connecting portion.

101. The power conversion device of claim 100, wherein: The support connecting portion is a protrusion or a groove, and the bottom plate connecting portion is a groove or a protrusion that is detachably cooperated with the support connecting portion.

102. The power conversion device of claim 101, wherein: A recess is arranged along the circumferential direction of the protrusion, and a semicircular snap ring is arranged around the recess, and the semicircular snap ring is at least partially located outside the recess.

103. The power conversion device of claim 102, wherein: The caliber of the groove extends in the up-down direction of the power conversion device, and the caliber gradually increases from top to bottom.

104. A power conversion device, characterized by, It comprises: an outer shell; a battery compartment, at least partially located in the outer shell, configured to detachably assemble a battery pack; an inverter module arranged in a containing space between the outer shell and the battery compartment, capable of at least converting external electric energy and charging the battery pack; a plurality of walking mechanisms configured to support the power conversion device to walk on the ground, each of the walking mechanisms comprising a walking connecting portion for connecting with the bottom plate of the outer shell; wherein the inverter module is located between a plurality of walking connecting portions in a horizontal direction parallel to the bottom plate of the outer shell.

105. The power conversion device of claim 104, wherein: Further comprising at least a ventilation opening arranged on the side plate of the outer shell for dissipating heat from the inverter module, the ventilation opening is located outside the walking mechanism in a horizontal direction parallel to the bottom plate of the outer shell.

106. The power conversion device of claim 105, wherein: Both ends of the inverter module are provided with heat dissipation fans, and the air outlets of the heat dissipation fans at least partially overlap with the ventilation openings on the shell in the air outlet direction of the heat dissipation fans.

107. The power conversion device of claim 106, wherein: The bottom plate of the outer shell is provided with a bottom plate connecting portion that is mounted in cooperation with the walking connecting portion.

108. An energy storage bidirectional power supply, comprising: It comprises: an outer shell; a battery compartment, at least partially located in the outer shell, configured to detachably assemble a battery pack; an inverter module arranged in a containing space between the outer shell and the battery compartment, capable of at least converting external electric energy and charging the battery pack; a control module arranged in the containing space between the outer shell and the battery compartment, at least for controlling the operation of the inverter module, the control module is located above the inverter module in the up-down direction of the energy storage bidirectional power supply; a plurality of walking mechanisms configured to support the power conversion device to walk on the ground, each of the walking mechanisms comprising a walking connecting portion for connecting with the bottom plate of the outer shell; wherein the inverter module is located between a plurality of walking connecting portions in a horizontal direction parallel to the bottom plate of the outer shell.

109. The energy storage bidirectional power supply of claim 108, wherein: The bottom plate of the outer shell is provided with a bottom plate connecting portion that is mounted in cooperation with the walking connecting portion.

110. The energy storage bidirectional power supply of claim 108, wherein: Further comprising at least a ventilation opening arranged on the side plate of the outer shell for dissipating heat from the inverter module, the ventilation opening is located outside the walking mechanism in a horizontal direction parallel to the bottom plate of the outer shell.

111. A power conversion device, characterized by, It comprises: a shell; a battery pack, detachably mounted in the shell; An inverter module capable of converting the electric energy of the battery pack to discharge externally or converting the external electric energy to charge the battery pack; The shell is provided with a heat dissipation air inlet, and a protective screen assembly capable of covering the heat dissipation air inlet is arranged at the heat dissipation air inlet.

112. The power conversion device of claim 111, wherein: The first protective screen is located outside the second protective screen, and the mesh size of the first protective screen is larger than that of the second protective screen.

113. The power conversion device of claim 111 or 112, wherein: The first protective screen and the second protective screen are connected by pasting.

114. The power conversion device of claim 111 or 112, wherein: The outer shell is provided with a sliding groove, and the first protective screen is inserted into the sliding groove.

115. The power conversion device of claim 111 or 112, wherein: The first protective screen and the second protective screen are connected by magnetic attraction.

116. The power conversion device of claim 111, wherein: The size of the mesh of the first protective screen is greater than or equal to 2mm and less than or equal to 3mm.

117. The power conversion device of claim 111, wherein: Both sides of the shell are provided with the heat dissipation air inlets, and each heat dissipation air inlet is provided with the protective screen assembly.

118. The power conversion device of claim 111, wherein: The shell is provided with a containing portion capable of containing the protective screen assembly, and the containing portion is recessed inwardly from the outer surface of the shell.

119. The power conversion device of claim 118, wherein: The heat dissipation air inlet is arranged in the containing portion, and the containing portion is formed with a third protective screen.

120. The power conversion device of claim 111, wherein: The first protective screen is a grid structure, and the second protective screen is a honeycomb screen structure.

121. An electric power conversion device, characterized by, It comprises: A shell; A battery pack detachably mounted in the shell; An inverter module capable of converting the electric energy of the battery pack to discharge externally or converting the external electric energy to charge the battery pack; The shell is provided with a heat dissipation air inlet, and a protective screen assembly capable of covering the heat dissipation air inlet is arranged at the heat dissipation air inlet. A moving assembly configured to support the movement of the entire power conversion device.

122. An energy storage bidirectional power supply, comprising: It comprises: A shell; A plurality of battery cells arranged in the shell; An inverter module capable of converting the electric energy of the plurality of battery cells to discharge externally or converting the external electric energy to charge the plurality of battery cells; The shell is provided with symmetrically arranged heat dissipation air inlets, and a protective screen assembly capable of covering the heat dissipation air inlets is arranged at the heat dissipation air inlets. The protective screen assembly comprises first and second protective screens with different mesh sizes.

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