A conversion device and an energy storage apparatus

Abstract

This application relates to the field of converter technology, and more particularly to a conversion device and an energy storage device. The conversion device includes a converter, which comprises a circuit board and a bracket fixedly connected together. The circuit board includes a processor and a first element. The processor is disposed on a first side of the circuit board, and the first element is disposed on a second side of the circuit board. The circuit board has two first sides disposed opposite to each other along a first direction. Along the first direction, the distance between the first element and one of the first sides is greater than the distance between the first element and the other first side. Two converters are disposed at a distance from each other along a second direction, with the circuit boards of the two converters disposed at a distance from each other along the second direction. The second sides of the two circuit boards are opposite to each other along the second direction, and the two first elements are staggered in the first direction. This allows the two circuit boards to be disposed closer together, thereby reducing the overall size of the conversion device and the space occupied by the conversion device in the energy storage device.

Description

Technical Field

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

[0002] In existing energy storage devices, a DC-DC converter needs to be connected between the battery and the inverter. Typically, two DC-DC converters are used, each installed independently and with its own independent cooling system. This means that the two DC-DC converters occupy a significant amount of internal space within the energy storage device, resulting in relatively low internal space utilization and volumetric energy density. Utility Model Content

[0003] To address the aforementioned problems, embodiments of this application provide a conversion device and an energy storage device.

[0004] In a first aspect, embodiments of this application provide a conversion device, which has a first direction and a second direction, the first direction and the second direction intersecting, including:

[0005] A converter includes a circuit board and a bracket, the circuit board being fixedly connected to the bracket; the circuit board includes a processor and a first component, the circuit board having a first side, a second side, and a first edge, the processor being disposed on the first side, and the first component being disposed on the second side; there are two first edges, and the two first edges are disposed opposite each other along a first direction, and along the first direction, the distance between the first component and one of the first edges is greater than the distance between the first component and the other first edge;

[0006] The converter is provided in two parts, the circuit boards of the two converters are arranged at intervals relative to each other along the second direction, the second sides of the two circuit boards are opposite each other along the second direction, and the two first elements are misaligned in the first direction.

[0007] Optionally, the bracket includes a first part and a second part, two first parts are provided, the two first parts are arranged opposite to each other and spaced apart, the second part is disposed between the two first parts and connected to the two first parts; the circuit board is fixedly connected to the second part and the second side faces the second part, the second part has a first through hole, and the first element passes through the first through hole;

[0008] The brackets of the two converters are interlocked, and the first part of one converter abuts against the first part of the other converter along the second direction; the first part and the second part of the two converters form a heat dissipation channel for refrigerant flow.

[0009] Optionally, the converter includes a base plate; the base plate is disposed between and connected to the two first portions, and along the second direction, the base plate is spaced apart from the second portions, the base plate has a second through hole, and the first element passes through the second through hole;

[0010] The base plates of the two converters are spaced apart relative to each other along the second direction, and the heat dissipation channel is divided into at least two sub-channels.

[0011] Optionally, the converter includes a support structure disposed on the side of the base plate opposite to the second portion; along the second direction, the distance from the end of the first element away from the circuit board to the side of the base plate opposite to the circuit board is not greater than the external dimensions of the support structure along the second direction.

[0012] Optionally, the converter includes a heat sink, and the circuit board includes power components;

[0013] The power element is located on a second side of the circuit board, and the second part has a third through hole;

[0014] The heat sink is fixedly connected to the second part and is disposed on the side of the second part facing away from the circuit board. The power element passes through the third through hole and contacts the heat sink.

[0015] Optionally, the conversion device includes a fan assembly;

[0016] The bracket has an opening, and the openings of the two brackets form an air inlet, which is connected to the heat dissipation channel; the fan assembly is fixedly connected to the bracket, and the fan assembly is arranged opposite to the air inlet along the air outlet direction of the fan assembly.

[0017] Optionally, the bracket has a third part disposed within the heat dissipation channel along the air outlet direction of the fan assembly, and the third part is offset from the first element.

[0018] Optionally, the third part is fixedly connected to both the first part and the second part.

[0019] Optionally, the conversion device includes a connector; the connector is fixedly connected to the brackets of the two converters respectively.

[0020] Optionally, the connector is provided with a lifting structure.

[0021] Secondly, embodiments of this application provide an energy storage device, which includes any of the conversion devices described above.

[0022] In some implementations of this application, the conversion device includes two converters. Each converter includes a circuit board and a bracket fixedly connected to each other. The circuit board has a processor and a first element. The processor is disposed on a first side of the circuit board, and the first element is disposed on a second side of the circuit board. The circuit board has two first sides disposed opposite each other along a first direction. Along the first direction, the distance between the first element and one of the first sides is greater than the distance between the first element and the other first side. When the two converters are interlocked along a second direction, the circuit boards of the two converters are spaced apart opposite each other along the second direction, and the second sides of the two circuit boards are opposite each other along the second direction. Since the distance between the first element and one of the first sides along the first direction is greater than the distance between the first element and the other first side, the two first elements can be misaligned in the first direction without interfering with each other. The two circuit boards can be disposed closer along the second direction, thereby reducing the overall volume of the conversion device after the two converters are interlocked. This helps to reduce the space occupied by the conversion device in the energy storage device, allowing more batteries to be placed in the saved space, thus improving the space utilization and volumetric energy density inside the energy storage device. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 These are isometric views of the conversion device in some embodiments of this application;

[0025] Figure 2 yes Figure 1 Exploded view of the converter;

[0026] Figure 3 yes Figure 1 Isometric view in another direction (without fan assembly and connectors);

[0027] Figure 4 yes Figure 1 Axonometric view in another direction;

[0028] Reference numerals: 1. Converter; 11. Circuit board; 11a. First side; 11b. Second side; 11c. First side edge; 111. Processor; 112. First component; 113. Power component; 12. Bracket; 12a. Opening; 121. First part; 122. Second part; 1221. First through hole; 1222. Third through hole; 123. Third part; 13. Heat dissipation channel; 131. Sub-channel; 14. Base plate; 141. Second through hole; 15. Support structure; 16. Heat sink; 2. Fan assembly; 3. Air inlet; 4. Connector; 41. Lifting structure; X - First direction; Y - Third direction; Z - Second direction. Detailed Implementation

[0029] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0030] Energy storage devices are devices that can store energy and release it when needed. For example, energy storage devices can store excess electrical energy when power generation is high and power consumption is low, and release the stored energy when power generation is low and power consumption is high. Therefore, energy storage devices play an important new and flexible regulation means in the power system, playing a positive role on the power source side, load side, and grid side.

[0031] Existing energy storage devices require a DC-DC converter between the battery and the inverter. The DC-DC converter helps ensure a balance in charging and discharging power between battery clusters, preventing internal circulating currents caused by differences in battery internal resistance, and thus avoiding the "weakest link" effect. This improves battery life and increases the discharge capacity of the energy storage device, while also providing better protection for the mixing of new and old batteries.

[0032] An existing energy storage device incorporates two DC-DC converters. These converters are typically installed independently and each has its own independent cooling system. Because space needs to be allocated for each DC-DC converter and its cooling system, these components occupy a significant amount of internal space. This results in relatively low space utilization and volumetric energy density, hindering efforts to increase the energy storage device's capacity.

[0033] To address the aforementioned problems, embodiments of this application provide a conversion device and an energy storage device.

[0034] In a first aspect, embodiments of this application provide a conversion device, referring to... Figure 1 The conversion device described in this application embodiment has a first direction X and a second direction Z. The first direction X and the second direction Z are two intersecting directions. The first direction X and the second direction Z can be in a general intersecting relationship, that is, the included angle between the first direction X and the second direction Z is an acute angle or an obtuse angle. Preferably, the first direction X and the second direction Z are two orthogonal directions, that is, the included angle between the first direction X and the second direction Z is a right angle.

[0035] refer to Figure 1 The conversion device specifically includes two identical converters 1. In the embodiments described in this application, converter 1 can specifically be a DC converter 1, or an AC converter 1, etc. In other words, the specific type of converter 1 is not specifically limited in the embodiments described in this application. (See reference...) Figure 2 The converter 1 specifically includes a circuit board 11 and a bracket 12, which are fixedly connected by means of adhesive bonding, fasteners, etc. The circuit board 11 is the main component that realizes the conversion function of the converter 1. The circuit board 11 includes electronic components such as a processor 111 and a first element 112. The processor 111 is the core component for performing conversion functions such as current adjustment, and the first element 112 is the component on the circuit board 11 that generates significant heat. In the embodiment described in this application, the converter 1 is specifically a DC-DC converter 1, and the first element 112 is the transformer of the DC-DC converter 1. The circuit board 11 has a first side 11a, a second side 11b, and a first side 11c. The processor 111 is disposed on the first side 11a. In other words, the first side 11a is the surface on which the main electronic components on the circuit board 11 are disposed. Electronic components such as the processor 111 and capacitors are disposed on the first side 11a of the circuit board 11, and their pins pass through the circuit board 11 and are fixedly connected to the pads on the second side 11b of the circuit board 11 by soldering.

[0036] refer to Figure 2 The first element 112 is disposed on the second side 11b and is eccentrically disposed in the first direction X. Specifically, the circuit board 11 is provided with two first sides 11c, and the two first sides 11c are disposed opposite to each other along the first direction X. Along the first direction X, the distance between the first element 112 and one of the first sides 11c is greater than the distance between the first element 112 and the other first side 11c.

[0037] When two converters 1 are snapped together, their circuit boards 11 are spaced apart along the second direction Z, and their second sides 11b are opposite each other along the second direction Z. Since the distance between the first element 112 and one of its first sides 11c along the first direction X is greater than the distance between the first element 112 and the other first side 11c, the two first elements 112 can be misaligned along the first direction X without interfering with each other. The two circuit boards 11 can be positioned closer together along the second direction Z, thereby reducing the overall volume of the conversion device after the two converters 1 are snapped together. This helps reduce the space occupied by the conversion device in the energy storage device, allowing more batteries to be placed in the saved space, thus improving the space utilization and volumetric energy density inside the energy storage device.

[0038] refer to Figure 3 In some embodiments of this application, optionally, the bracket 12 includes a first part 121 and a second part 122. Two first parts 121 are provided, spaced apart from each other. The second part 122 is disposed between and connected to the two first parts 121. The circuit board 11 is fixedly connected to the second part 122 of the bracket 12 by fasteners, adhesive bonding, or other means. In the embodiments described in this application, a rivet nut is provided on the second part 122 of the bracket 12, and the circuit board 11 is fixedly connected to the rivet nut on the second part 122 by screws. The rivet nut ensures a certain gap between the circuit board 11 and the bracket 12, thus preventing electrical conductivity between the circuit board 11 and the bracket 12 while also improving the heat dissipation of the circuit board 11.

[0039] refer to Figure 3The second side 11b of the circuit board 11 faces the second portion 122. At this time, the first element 112 of the circuit board 11 also extends towards the second portion 122 of the bracket 12. To avoid the first element 112, the second portion 122 has a first through hole 1221, and the first element 112 passes through the first through hole 1221. When the two converters 1 are engaged, the first portion 121 of one converter 1 abuts against the first portion 121 of the other converter 1 along the second direction Z. At this time, the first portions 121 and second portions 122 of the two converters 1 form a heat dissipation channel 13 for refrigerant flow. After the first element 112 passes through the first through hole 1221, a portion of it is directly located within the heat dissipation channel 13. When cold air, water, or other refrigerant is injected into the heat dissipation channel 13, the refrigerant can directly exchange heat with the portion of the first element 112 located within the heat dissipation channel 13. This ensures good heat dissipation for the first element 112. Meanwhile, since the heat dissipation channel 13 is surrounded by the brackets 12 of the two converters 1, portions of the two first elements 112 are located within the heat dissipation channel 13. This allows the refrigerant to dissipate heat from both first elements 112 simultaneously. Compared to the technical solution of dissipating heat from each first element 112 separately, this helps to reduce the space occupied by the conversion device and also helps to reduce the energy consumption of the conversion device during heat dissipation.

[0040] refer to Figure 3 In some embodiments of this application, the converter 1 includes a base plate 14. The base plate 14 is disposed between and connected to the two first portions 121. Along the second direction Z, the base plate 14 is spaced apart from the second portions 122. The base plate 14 has a second through hole 141, and a first element 112 passes through the second through hole 141. After the two converters 1 are snapped together, the base plates 14 of the two converters 1 are spaced apart from each other along the second direction Z, and the heat dissipation channel 13 is divided into at least two sub-channels 131.

[0041] Specifically, the base plates 14 of the two converters 1 are spaced apart relative to each other along the second direction Z, dividing the heat dissipation channel 13 into two sub-channels 131. Each converter 1 has one sub-channel 131, which is formed by the bracket 12 of its respective converter 1 and the base plate 14. The base plate 14 is specifically a bent plate with a bent edge. When the two converters 1 are fastened together, the bent edge of the base plate 14 can seal the gap between the two base plates 14 to prevent refrigerant from flowing within the gap. The first element 112 on the converter 1 passes through the first through hole 1221 into the sub-channel 131, so that the refrigerant in the sub-channel 131 can directly exchange heat with the portion of the first element 112 located within the sub-channel 131. In actual implementation, the specific positions of the first element 112 and the base plate 14 can be adjusted so that the most severely heated part of the first element 112 is located within the sub-channel 131. The less severely heated end portion exits the sub-channel 131 through the second through hole 141. At this time, the refrigerant in the sub-channel 131 can directly exchange heat with the part of the first element 112 that is most severely heated, which not only improves the heat exchange efficiency of the first element 112, but also makes the arrangement of the refrigerant more reasonable.

[0042] Alternatively, the base plates 14 of the two converters 1 are spaced apart relative to each other along the second direction Z, dividing the heat dissipation channel 13 into three sub-channels 131. In this case, the brackets 12 and base plates 14 of each of the two converters 1 respectively form a sub-channel 131, and the gap between the two base plates 14 forms a third sub-channel. This ensures that the portion of the first element 112 extending into the heat dissipation channel 13 can contact the refrigerant and exchange heat, thereby giving the portion of the first element 112 extending into the heat dissipation channel 13 a more comprehensive heat dissipation effect.

[0043] refer to Figure 3In some embodiments of this application, optionally, the converter 1 includes a support structure 15. The support structure 15 is disposed on the side of the base plate 14 facing away from the second portion 122, and along the second direction Z, the distance from the end of the first element 112 away from the circuit board 11 to the side of the base plate 14 facing away from the circuit board 11 is not greater than the external dimensions of the support structure 15 along the second direction Z. Since the first element 112 protrudes from the second through hole 141 of the base plate 14, when the converter 1 is placed on the bearing surface with the first element 112 facing the bearing surface, the first element 112 protruding from the second through hole 141 is prone to colliding with the bearing surface. Along the second direction Z, the distance from the end of the first element 112 away from the circuit board 11 to the side of the base plate 14 facing away from the circuit board 11 is less than or equal to the external dimensions of the support structure 15 along the second direction Z. Therefore, the support structure 15 can support the converter 1 to prevent the first element 112 from colliding with the bearing surface. In the embodiments described in this application, the second direction Z is preferably the direction of gravity. When the converter 1 is placed on a table or ground surface with the first element 112 facing downwards in the direction of gravity, the support structure 15 can lift the converter 1 to prevent the first element 112 from hitting the ground. Specifically, the support structure 15 can be a columnar structure fixed to the base plate 14 by welding, bonding, fastener connection, etc., or it can be a press-fit stud fixed to the base plate 14 by press-fitting.

[0044] In the embodiments described in this application, guide holes may also be provided on the base plate 14. When the two converters 1 are fastened together, the support structure 15 on one converter 1 can be inserted into the guide hole in the other converter 1 to provide guidance for the fastening process of the two converters 1.

[0045] refer to Figure 2 In some embodiments of this application, optionally, the converter 1 includes a heat sink 16, and the circuit board 11 includes a power element 113. The power element 113 may specifically be a high-voltage transistor, a low-voltage transistor, or other device that generates a large amount of heat during operation. The specific type and number of power elements 113 can be determined according to actual needs, and will not be elaborated here. The power element 113 is specifically disposed on the second side 11b of the circuit board 11, that is, the power element 113 and the first element 112 are disposed on the same side of the circuit board 11.

[0046] refer to Figure 2The heat sink 16 can specifically be a heat dissipation fin. The heat sink 16 can be fixedly connected to the side of the second part 122 facing away from the circuit board 11 by welding, bonding, or fastening. The second part 122 of the bracket 12 has a third through hole 1222 through which the power component 113 passes and contacts the heat sink 16. To achieve insulation between the power component 113 and the heat sink 16, an insulating thermally conductive pad such as a ceramic pad can be placed on the heat sink 16. The power component 113 directly contacts the insulating thermally conductive pad on the heat sink 16, allowing the heat generated by the power component 113 to be transferred to the main body of the heat sink 16 via the insulating thermally conductive pad. Since the heat sink 16 is connected to the side of the second part 122 facing away from the circuit board 11, after the two converters 1 are interlocked, the heat sink 16 is precisely located within the heat dissipation channel 13 formed by the interlocking of the two brackets 12. The heat on the heat sink 16 can be promptly carried away by the refrigerant within the heat dissipation channel 13 to ensure the heat dissipation effect of the power device. In other words, the above arrangement ensures the heat dissipation effect of the power device on the conversion device. Meanwhile, since the heat dissipation channel 13 is surrounded by the brackets 12 of the two converters 1, the heat sinks 16 of the two converters 1 are both located within the heat dissipation channel 13. This allows for simultaneous heat dissipation of the heat sinks 16 on both converters 1. Compared to the technical solution of dissipating heat from each converter 1 separately, this helps to reduce the space occupied by the conversion device and also reduces the energy consumption of the conversion device during heat dissipation.

[0047] refer to Figure 1 In some embodiments of this application, the conversion device optionally includes a fan assembly 2. In the embodiments described in this application, the fan assembly 2 may specifically include a fan frame and fans mounted on the fan frame. The fan assembly 2 may specifically have one, two, three, or even more fans; the specific number of fans can be determined according to actual needs, and will not be elaborated here. Specifically, in the embodiments described in this application, the fan assembly 2 has three fans, and the three fans are arranged along a first direction X.

[0048] refer to Figure 2 The bracket 12 has an opening 12a. (See reference) Figure 3When the two converters 1 are interlocked, the openings 12a of the brackets 12 on the two converters 1 form an air inlet 3 that communicates with the heat dissipation channel 13. The fan assembly 2 is fixedly connected to the brackets 12, which can be achieved by fasteners, welding, bonding, or other methods. When the fan assembly 2 is running, it can deliver air, which serves as the refrigerant, into the heat dissipation channel 13 in a single direction, which is the air outlet direction of the fan assembly 2. Under the action of the fan assembly 2, the heat of the first element 112 and the heat sink 16 can be quickly carried away by the air, which serves as the refrigerant. This can improve the heat dissipation efficiency of the first element 112 and the power device on the conversion device, and also help ensure the heat dissipation effect of the first element 112 and the power device. At the same time, since the heat dissipation channel 13 is formed by the brackets 12 of the two converters 1, the first element 112 and the heat sink 16 of the two converters 1 are both located within the heat dissipation channel 13. This allows a single fan assembly 2 to simultaneously cool the first element 112 and the heat sink 16 on both converters 1. Compared to the technical solution of using a separate fan assembly 2 for each converter 1, this reduces the size of the conversion device and also lowers the energy consumption during heat dissipation.

[0049] Specifically, in the embodiments described in this application, the conversion device has a third direction Y. The third direction Y intersects the first direction X and the second direction Z respectively, but they are not coplanar. The first direction X, the second direction Z, and the third direction Y are preferably three mutually orthogonal directions. In this case, the first direction X and the third direction Y can be two horizontal directions, and the second direction Z can be the direction of gravity.

[0050] The airflow direction of the fan assembly 2 is specifically the same as the third direction Y. The first part 121 of the bracket 12 is arranged at intervals along the first direction X; the first part 121 and the second part 122 form the opening 12a of the bracket 12 along the edge of the third direction Y. After the two converters 1 are fastened together, the first part 121 and the second part 122 of the two brackets 12 form a frame structure, which has a cavity that runs through the third direction Y, and this cavity is the heat dissipation channel 13. The opening 12a of the two brackets 12 forms an air inlet 3, which is connected to the heat dissipation channel 13. When the fan assembly 2 is working, the fan assembly 2 can send air, which is used as a refrigerant, into the heat dissipation channel 13 through the air inlet 3. After the air exchanges heat with the first element 112 and the heat sink 16 in the heat dissipation channel 13, it flows out from the other end of the heat dissipation channel 13.

[0051] refer to Figure 3In some embodiments of this application, optionally, the bracket 12 has a third portion 123 disposed within the heat dissipation channel 13. Along the airflow direction of the fan assembly 2, the third portion 123 is offset from the first element 112. The third portion 123 can obstruct the flow of air from the fan assembly 2 into the heat dissipation channel 13, allowing the air from the fan assembly 2 into the heat dissipation channel 13 to flow as close as possible to the first element 112, thereby improving the heat dissipation capacity of the first element 112. When the circuit board 11 is provided with a power element 113, and the converter 1 has a heat sink 16 for dissipating heat from the power element 113, along the airflow direction of the fan assembly 2, the third portion 123 can also be offset from the heat sink 16, so that the air from the fan assembly 2 into the heat dissipation channel 13 can flow as close as possible to the heat sink 16. In the embodiments described in this application, the third portion 123 is preferably a plate-like structure, and the thickness direction of the third portion 123 is the same as the airflow direction of the fan assembly 2. The specific shape of the third part 123 can be determined according to actual needs. For example, the third part 123 can be a plate-like structure in the shape of a rectangle, circle, triangle, trapezoid, etc., which will not be listed in detail here.

[0052] In some embodiments of this application, optionally, the third part 123 is fixedly connected to both the first part 121 and the second part 122. This allows the third part 123 to serve as a reinforcing structure, improving the structural rigidity and strength of the support 12. Specifically, in the embodiments described in this application, the support 12 is a structure formed from a thin plate using sheet metal processing. The first part 121 and the second part 122 of the support 12 are both thin-walled plate structures. The third part 123 can specifically be a plate structure, and its edge can be fixedly connected to the first part 121 and the second part 122 by welding. In this case, the third part 123 acts as a reinforcing rib between the first part 121 and the second part 122, preventing relative swaying or deformation between them. This effectively prevents deformation or instability of the support 12, thereby ensuring the structural stability of the conversion device.

[0053] refer to Figure 4In some embodiments of this application, optionally, the conversion device includes a connector 4. The connector 4 is fixedly connected to the brackets 12 of the two converters 1 respectively, thereby achieving a fixed connection between the brackets 12 of the two converters 1. The connector 4 prevents the brackets 12 of the two converters 1 from moving relative to each other or disengaging, ensuring that the brackets 12 of the two converters 1 remain in a preset position, thus contributing to the structural reliability of the conversion device. In the embodiments described in this application, the connector 4 may be specifically fixedly connected to the first part 121 of the bracket 12. After the two converters 1 are snapped together, the first parts 121 of the two brackets 12 abut against each other. For any two abutting first parts 121, the connector 4 can be fixedly connected to both of these first parts 121 simultaneously. For example, the connector 4 is provided with a connecting hole, and the first parts 121 of both brackets 12 are provided with threaded holes; the connector 4 and the first parts 121 of the brackets 12 are fixedly connected by screws. When the first part 121 is a thin-walled plate structure, a rivet nut can be installed on the first part 121, or a block structure with threaded holes can be welded on, so that the first part 121 and the connector 4 can be fixedly connected by screws. Alternatively, the connector 4 can also be fixedly connected to the first part 121 by welding. The connector 4 can also be fixedly connected to the second part 122 of the bracket 12. For example, the connector 4 can be a columnar part disposed between the second parts 122 of the two brackets 12, with threaded holes at both ends. The second part 122 of the bracket 12 is provided with a connecting hole, so that the second part 122 of the bracket 12 can be fixedly connected to the connector 4 by screws. Alternatively, the connector 4 can also be fixedly connected to the second part 122 of the bracket 12 by welding.

[0054] refer to Figure 4In some embodiments of this application, optionally, the connector 4 is provided with a lifting structure 41. After the conversion device is assembled, it can be lifted to a certain height using a lifting device, then adjusted to a suitable position for installation in the energy storage device, and finally transferred to the energy storage device for installation using the lifting device. During this process, the lifting structure 41 can serve as a connection point to connect the lifting structure 41 with the conversion device. Therefore, the provision of the lifting structure 41 facilitates the connection between the lifting device and the conversion device, making it easier to install the conversion device using the lifting device. This facilitates the installation of the conversion device, reduces the installation difficulty, and improves the installation efficiency. Specifically, the lifting structure 41 can be a lifting hole opened on the connector 4, a lifting eye screw threaded onto the connector 4, or even a lifting lug fixed to the connector 4 by welding, fastener connection, or other means. Preferably, in the embodiments described in this application, the connector 4 can be a plate with an L-shaped cross-section, that is, the connector 4 has two mutually perpendicular plates. One plate of the connector 4 is fixedly connected to the brackets 12 of the two converters 1, and the other plate is provided with a lifting hole as a lifting structure 41. The number and location of the lifting structures 41 can be determined according to the actual lifting needs. For example, in a single connector 4, only one lifting structure 41 can be provided and located at the center of the connector 4. Alternatively, two lifting structures 41 can be provided and located at both ends of the connector 4 respectively.

[0055] Secondly, embodiments of this application provide an energy storage device, which includes any of the conversion devices described above. Using the aforementioned conversion device, when two converters 1 are fastened together, the circuit boards 11 of the two converters 1 are spaced apart relative to each other along the second direction Z, and the second side surfaces 11b of the two circuit boards 11 are opposite each other along the second direction Z. Since the distance between the first element 112 and one of the first side surfaces 11c along the first direction X is greater than the distance between the first element 112 and the other first side surface 11c, the two first elements 112 can be misaligned in the first direction X without interfering with each other. The two circuit boards 11 can be positioned closer along the second direction Z, thereby reducing the overall volume of the conversion device after the two converters 1 are fastened together. This helps to reduce the space occupied by the conversion device in the energy storage device, allowing more batteries to be arranged in the saved space, thus improving the space utilization and volumetric energy density inside the energy storage device.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0057] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or at least two of the features. In the description of this utility model, unless otherwise stated, "at least two" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0058] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "left", "right", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0059] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or at least two embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A conversion device, characterized in that, The conversion device has a first direction (X) and a second direction (Z), the first direction (X) and the second direction (Z) intersecting, and includes: A converter (1) includes a circuit board (11) and a bracket (12), the circuit board (11) and the bracket (12) being fixedly connected; the circuit board (11) includes a processor (111) and a first element (112), the circuit board (11) having a first side (11a), a second side (11b) and a first side (11c), the processor (111) being disposed on the first side (11a), and the first element (112) being disposed on the second side (11b); there are two first side (11c), and the two first side (11c) are disposed opposite to each other along the first direction (X), along the first direction (X), the distance between the first element (112) and one of the first side (11c) is greater than the distance between the first element (112) and the other first side (11c); Two converters (1) are provided, and the circuit boards (11) of the two converters (1) are arranged at intervals relative to each other along the second direction (Z). The second side surfaces (11b) of the two circuit boards (11) are opposite to each other along the second direction (Z), and the two first elements (112) are misaligned in the first direction (X).

2. The conversion device according to claim 1, characterized in that, The bracket (12) includes a first part (121) and a second part (122). There are two first parts (121) arranged at intervals. The second part (122) is arranged between the two first parts (121) and connected to them. The circuit board (11) is fixedly connected to the second part (122) and its second side (11b) faces the second part (122). The second part (122) has a first through hole (1221) and the first element (112) passes through the first through hole (1221). The brackets (12) of the two converters (1) are fastened together, and the first part (121) of one converter (1) abuts against the first part (121) of the other converter (1) along the second direction (Z); the first part (121) and the second part (122) of the two converters (1) form a heat dissipation channel (13) for the circulation of refrigerant.

3. The conversion device according to claim 2, characterized in that, The converter (1) includes a base plate (14); the base plate (14) is disposed between and connected to the two first parts (121) along the second direction (Z), the base plate (14) and the second part (122) are disposed at a distance from each other, the base plate (14) has a second through hole (141), and the first element (112) passes through the second through hole (141); The base plates (14) of the two converters (1) are arranged at relative intervals along the second direction (Z) and the heat dissipation channel (13) is divided into at least two sub-channels (131).

4. The conversion device according to claim 3, characterized in that, The converter (1) includes a support structure (15) disposed on the side of the base plate (14) facing away from the second part (122); along the second direction (Z), the distance from the end of the first element (112) away from the circuit board (11) to the side of the base plate (14) facing away from the circuit board (11) is not greater than the outer dimensions of the support structure (15) along the second direction (Z).

5. The conversion device according to any one of claims 2-4, characterized in that, The converter (1) includes a heat sink (16), and the circuit board (11) includes a power element (113). The power element (113) is located on the second side (11b) of the circuit board (11), and the second part (122) has a third through hole (1222). The heat sink (16) is fixedly connected to the second part (122). The heat sink (16) is disposed on the side of the second part (122) facing away from the circuit board (11). The power element (113) passes through the third through hole (1222) and contacts the heat sink (16).

6. The conversion device according to claim 2, characterized in that, The conversion device includes a fan assembly (2); The bracket (12) has an opening (12a), and the openings (12a) of the two brackets (12) form an air inlet (3), which is connected to the heat dissipation channel (13); the fan assembly (2) is fixedly connected to the bracket (12), and the fan assembly (2) is arranged opposite to the air inlet (3) along the air outlet direction of the fan assembly (2).

7. The conversion device according to claim 6, characterized in that, The bracket (12) has a third part (123) which is disposed in the heat dissipation channel (13) along the air outlet direction of the fan assembly (2) and is offset from the first element (112).

8. The conversion device according to claim 7, characterized in that, The third part (123) is fixedly connected to the first part (121) and the second part (122).

9. The conversion device according to any one of claims 1-4, characterized in that, The conversion device includes a connector (4); the connector (4) is fixedly connected to the bracket (12) of each of the two converters (1).

10. The conversion device according to claim 9, characterized in that, The connector (4) is provided with a hoisting structure (41).

11. An energy storage device, characterized in that, The energy storage device includes the conversion device as described in any one of claims 1-10.

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