Energy storage unit, conversion module and energy storage device

Abstract

The embodiment of the utility model provides an energy storage unit, a conversion module and an energy storage device. The energy storage unit comprises a battery module and a conversion module, the conversion module is detachably connected to the battery module and electrically connected with the battery module, and the conversion module is used for converting voltage provided by the battery module. According to the energy storage unit provided by the embodiment of the invention, the maintenance difficulty of the energy storage device can be reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage, and particularly relates to an energy storage unit, a conversion module and an energy storage device. BACKGROUND

[0002] With the continuous development of new energy technology, more and more household tools and appliances begin to use voltage as a power source. In order to avoid the situation that household tools and appliances cannot be used when there is a power shortage, people usually equip energy storage devices for storing voltage at home for future use.

[0003] The energy storage unit in the energy storage device disclosed in the related art usually comprises a battery module and a conversion module connected to the battery module. The battery module stores voltage, and the conversion module converts the voltage of the battery module and provides it to household appliances to adapt to the working requirements of different appliances. However, the conversion module in the energy storage unit is usually fixedly connected to the battery module. When the conversion module needs to be replaced or repaired, the conversion module is difficult to disassemble and assemble, thereby increasing the difficulty of maintenance and repair of the energy storage device. UTILITY MODEL CONTENT

[0004] The application aims to provide an energy storage unit, a conversion module and an energy storage device to solve the problem of high difficulty in maintenance and repair of the existing energy storage device.

[0005] In order to solve the above technical problem, the application is implemented as follows:

[0006] In a first aspect, the application discloses an energy storage unit, which comprises:

[0007] a battery module, which is used to provide voltage;

[0008] and a conversion module, which is detachably connected to the battery module and electrically connected to the battery module, and is used to convert the voltage provided by the battery module.

[0009] Optionally, the battery module comprises a first plug-in part, and the conversion module comprises a second plug-in part, the first plug-in part and the second plug-in part being plugged into each other.

[0010] Optionally, the first plug-in part and the second plug-in part are hot-plug connected.

[0011] Optionally, the first plug-in part is provided with a first electrical connecting piece, and the second plug-in part is provided with a second electrical connecting piece, the first electrical connecting piece and the second electrical connecting piece being electrically connected when the first plug-in part and the second plug-in part are plugged into each other.

[0012] Optionally, the first plug-in part comprises a first plug-in slot, the first electric connector is arranged in the first plug-in slot, the second plug-in part comprises a second plug-in slot, and the second electric connector is arranged in the second plug-in slot.

[0013] Optionally, a sealing member is connected to the first plug-in slot or the second plug-in slot, and the sealing member is used for sealing the first plug-in slot and the second plug-in slot.

[0014] Optionally, the battery module comprises a target surface and a side surface adjacent to the target surface, and the first plug-in part is connected to any one of the target surface and the side surface, wherein the target surface is a surface with the largest area of the battery module.

[0015] Optionally, a handle is arranged on a side of the conversion module away from the second plug-in part.

[0016] Optionally, a guide rail is connected to the battery module, and a sliding block is arranged on the conversion module and is slidingly connected to the guide rail.

[0017] Optionally, the guide rail comprises a first connecting part, a second connecting part and a third connecting part which are connected in sequence and vertically, the first connecting part is fixedly connected to the battery module, the second connecting part and the third connecting part and the battery module jointly define a receiving cavity, and the sliding block moves in the receiving cavity.

[0018] Optionally, the guide rail is two, and the two guide rails are connected to the battery module in a spaced manner.

[0019] Optionally, a limiting member is further arranged, the limiting member is arranged on a side of the guide rail and the sliding block away from the first plug-in part, and the limiting member is used for fixing the sliding block after the sliding block stops moving, so as to limit the sliding block.

[0020] Optionally, the limiting member comprises a first fixing part, a second fixing part and a fastener, a side of the guide rail away from the first plug-in part extends outward to form the first fixing part, a side of the sliding block away from the first plug-in part extends outward to form the second fixing part, the first fixing part and the second fixing part are superposed, and the fastener passes through the first fixing part and the second fixing part in sequence to fix the sliding block.

[0021] Optionally, the conversion module is any one of a direct-current-direct-current converter and a direct-current-alternating-current converter.

[0022] In a second aspect, the application further discloses a conversion module which is detachably connected to a terminal device and is adapted to be electrically connected with the terminal device, and is used for converting a voltage provided by the terminal device.

[0023] In a third aspect, the application further discloses a storage energy device, comprising the storage energy unit.

[0024] Optionally, the storage energy unit is at least two, the at least two storage energy units are stacked and distributed, and two adjacent battery modules are electrically connected.

[0025] Optionally, the two adjacent battery modules are detachably connected.

[0026] Optionally, the end surfaces of the two adjacent battery modules contact each other, one of the end surfaces is provided with a third plug-in part, the other end surface is provided with a fourth plug-in part, the third plug-in part is provided with a third electric connecting piece, the fourth plug-in part is provided with a fourth electric connecting piece, and the third electric connecting piece and the fourth electric connecting piece are electrically connected when the third plug-in part and the fourth plug-in part are plugged into each other.

[0027] Optionally, the storage energy device further comprises a control module, the control module is connected to the storage energy unit and is electrically connected to the storage energy unit.

[0028] Optionally, the storage energy device further comprises a base connected to the storage energy unit.

[0029] And an interlocking piece connected to the storage energy unit and / or the base.

[0030] In the embodiment of the application, the conversion module is detachably connected to the battery module, when the conversion module needs to be replaced or repaired, the conversion module is directly detached from the battery module, the conversion module is repaired or replaced, and the difficulty of maintenance and repair of the storage energy device is reduced.

[0031] Additional aspects and advantages of the application will be described in part in the description that follows, and will become apparent from the description that follows, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of the application will become apparent and be readily understood from the description that follows, including the appended drawings, in which:

[0033] Figure 1 is one of the structural schematic diagrams of the storage energy unit according to the embodiment of the application;

[0034] Figure 2 is a split schematic diagram of the storage energy unit according to the embodiment of the application;

[0035] Figure 3 is a structural schematic diagram of the battery module of the storage energy unit according to the embodiment of the application;

[0036] Figure 4 is a structural exploded schematic view of a conversion module of an energy storage unit shown in an embodiment of the present application;

[0037] Figure 5 is an enlarged schematic view of the structure at A shown in Figure 1

[0038] Figure 6 is a structural schematic view No. 2 of an energy storage unit shown in an embodiment of the present application;

[0039] Figure 7 is a structural schematic view No. 3 of an energy storage unit shown in an embodiment of the present application;

[0040] Figure 8 is a structural schematic view No. 4 of an energy storage unit shown in an embodiment of the present application;

[0041] Figure 9 is a structural schematic view No. 5 of an energy storage unit shown in an embodiment of the present application;

[0042] Figure 10 is a structural schematic view of an energy storage device shown in an embodiment of the present application.

[0043] Fig. 1 is an energy storage unit; Fig. 2 is a conversion module; Fig. 3 is a control module; Fig. 4 is a base; Fig. 5 is an interlocking piece; Fig. 6 is a guide rail; Fig. 7 is a first connecting piece; Fig. 8 is a second connecting piece; Fig. 9 is a third connecting piece; Fig. 10 is a limiting piece; Fig. 11 is a first fixed piece; Fig. 12 is a second fixed piece; Fig. 13 is a fastener; Fig. 14 is a first plug-in part; Fig. 15 is a first plug-in slot; Fig. 16 is a first electrical connecting piece; Fig. 17 is a third plug-in part; Fig. 18 is a third plug-in slot; Fig. 19 is a third electrical connecting piece; Fig. 20 is a target surface; Fig. 21 is a side surface; Fig. 22 is a second plug-in part; Fig. 23 is a second plug-in slot; Fig. 24 is a second electrical connecting piece; Fig. 25 is a sliding block; Fig. 26 is a handle; Fig. 27 is a sealing piece; Fig. 28 is a conversion housing; Fig. 29 is a sealing ring; Fig. 30 is a circuit board; Fig. 31 is a heat sink; Fig. 32 is a fixed screw; Fig. 33 is a back plate; Fig. 34 is a guide rail; Fig. 35 is a first connecting piece; Fig. 36 is a second connecting piece; Fig. 37 is a third connecting piece; Fig. 38 is a limiting piece; Fig. 39 is a first fixed piece; Fig. 40 is a second fixed piece; Fig. 41 is a fastener; Fig. 42 is a nut; Fig. 43 is a screw; Fig. 44 is a control module; Fig. 45 is a base; Fig. 46 is an interlocking piece. DETAILED DESCRIPTION

[0044] ​The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used to explain the present application, and should not be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0045] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0047] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] The embodiment of the present application provides a kind of energy storage unit 1, specifically, energy storage unit 1 is used to provide power supply to electric appliance.

[0049] Referring to Figure 1 , a structure schematic view of one of the energy storage units 1 described in the embodiments of the present application is shown, referring to Figure 2, a split schematic diagram of a kind of energy storage unit 1 described in the embodiment of the application is shown.The energy storage unit 1 includes battery module 10, the battery module 10 is used to provide voltage;And conversion module 20, the conversion module 20 is detachably connected to the battery module 10, and is electrically connected with the battery module 10, and the conversion module 20 is used to convert the voltage provided by the battery module 10.

[0050] Specifically, battery module 10 is used to output voltage, when battery module 10 outputs voltage, the output voltage can not match the voltage required by the electrical equipment.By conversion module 20, the output voltage of battery module 10 can be converted into the specific voltage required by the electrical equipment, to ensure that the electrical equipment operates normally.

[0051] In the embodiment of the application, by detachably connecting the conversion module 20 on the battery module 10, when the conversion module 20 needs to be replaced or repaired, the conversion module 20 is directly detached from the battery module 10, and the conversion module 20 is repaired or replaced, which reduces the difficulty of maintenance and maintenance of the energy storage device, in addition, the conversion module 20 is separated from the battery module 10 to form a separate warehouse structure, so that the cabins are relatively independent, thereby reducing the influence of heat exchange between the two in the same cabin on the entire energy storage device, and prolonging the service life of each electronic and electrical component inside the energy storage unit 1.

[0052] In some alternative embodiments, the conversion module 20 can be a direct-current-direct-current converter, or a direct-current-alternating-current converter, when the conversion module 20 is a direct-current-direct-current converter, the conversion module 20 can provide the direct-current voltage provided by the battery module 10 with voltage reduction or voltage increase, that is, the high-voltage direct-current can be converted into low-voltage direct-current, or the low-voltage direct-current can be converted into high-voltage direct-current, and then provided to the electrical equipment.When the conversion module 20 is a direct-current-alternating-current converter, the conversion module 20 can convert the alternating-current voltage provided by the battery module 10 into direct-current voltage or convert the direct-current voltage provided by the battery module 10 into alternating-current voltage, the specific type of the conversion module 20 as a direct-current-direct-current conversion module 20 can be selected according to actual needs, and the embodiment of the application does not make specific limitation.In practical application, by setting the conversion module 20, the voltage can be flexibly adjusted to meet the needs of various electrical equipment, and the compatibility of the energy storage unit 1 is enhanced.

[0053] Referring to Figure 3 , a structure schematic diagram of the battery module 10 of a kind of energy storage unit 1 described in the embodiment of the application is shown;Referring to Figure 4, shows a structural exploded view of a conversion module 20 of an energy storage unit 1 according to an embodiment of the present application. Optionally, the battery module 10 comprises a first plug-in part 101, and the conversion module 20 comprises a second plug-in part 201, the first plug-in part 101 and the second plug-in part 201 are plugged into each other.

[0054] Specifically, the battery module 10 comprises a battery shell and a battery pack arranged in the battery shell, the battery pack stores voltage, and the first plug-in part 101 is connected to the shell. The conversion module 20 comprises a conversion shell 206 and a converter assembly arranged in the conversion shell 206, the converter assembly is used to convert the voltage of the battery module 10, and the second plug-in part 201 is connected to the side wall of the conversion shell 206. In actual application, when the battery module 10 and the conversion module 20 are connected, the first plug-in part 101 and the second plug-in part 201 are plugged into each other, and the conversion module 20 can be detachably connected to the battery module 10. When the conversion module 20 needs to be repaired or replaced, the first plug-in part 101 and the second plug-in part 201 are separated. Since the plug-in is a relatively easy detachable way, the difficulty of maintenance and maintenance of the energy storage device can be reduced.

[0055] Further, as shown in Figure 4 The converter assembly can comprise a back plate 2001, a circuit board 208, a sealing ring 207, and a heat sink 209. The back plate 2001 is connected to the conversion shell 206, the conversion shell 206 and the back plate 2001 form an installation cavity, the circuit board 208 is arranged in the installation cavity, the circuit board 208 has a plurality of electronic components, which can be used to convert the voltage of the battery module 10. The sealing ring 207 is arranged between the conversion shell 206 and the back plate 2001, and the sealing ring 207 is used to seal the gap between the conversion shell 206 and the back plate 2001, so as to prevent external water vapor from entering the inside of the conversion shell 206. The conversion shell 206 is provided with a plurality of heat sinks 209 arranged at intervals, and the heat sinks 209 are used to reduce the temperature of the conversion module 20, so as to avoid that the temperature of the conversion module 20 is too high. Further, the conversion shell 206 and the back plate 2001 can be fixedly connected by a plurality of fixing screws 2010. The conversion shell 206 can also be provided with a cooling fan to further reduce the temperature of the conversion module 20.

[0056] In some optional embodiments, the first plug-in part 101 and the second plug-in part 201 are hot-plug connected.

[0057] Specifically, the hot plug connection refers to that a plurality of pins with different lengths are arranged in the first plug-in part 101 and the second plug-in part 201, and the pins have different sequences during the plugging process of the first plug-in part 101 and the second plug-in part 201, that is, the longer pins are contacted first, and the shorter pins are contacted later. For example, the pre-charging pin is usually a longer pin, and the power pin is usually a shorter pin. In actual application, the sudden contact and disconnection of the pins during the plugging process can cause electric arc, and the electric arc can generate electric sparks, which can damage the battery module 10 and the conversion module 20. By means of the hot plug connection of the first plug-in part 101 and the second plug-in part 201, the different sequences of the pins can reduce the generation of electric arc, reduce the damage risk of the battery module 10 and the conversion module 20, and prolong the service life of the energy storage unit 1.

[0058] Optionally, the first plug-in part 101 is provided with a first electrical connecting member 1012, and the second plug-in part 201 is provided with a second electrical connecting member 2012. When the first plug-in part 101 and the second plug-in part 201 are plugged with each other, the first electrical connecting member 1012 and the second electrical connecting member 2012 are electrically connected.

[0059] Specifically, the first plug-in part 101 is internally provided with the first electrical connecting member 1012, and the first electrical connecting member 1012 is electrically connected with the battery pack arranged inside the battery module 10 housing. The second plug-in part 201 is internally provided with the second electrical connecting member 2012, and the second electrical connecting member 2012 is electrically connected with the circuit board 208 arranged inside the conversion housing 206. When the first plug-in part 101 and the second plug-in part 201 are plugged with each other, the first electrical connecting member 1012 and the second electrical connecting member 2012 are contacted, and the first electrical connecting member 1012 and the second electrical connecting member 2012 are electrically connected, thereby electrically connecting the battery module 10 and the conversion module 20. In actual application, when the battery module 10 and the conversion module 20 are connected, the first plug-in part 101 and the second plug-in part 201 are plugged with each other at the same time, and the first electrical connecting member 1012 and the second electrical connecting member 2012 are electrically connected, without the need of additional wiring between the battery module and the conversion module 20. Therefore, when the conversion module 20 is repaired or replaced, the wiring or unwiring between the battery module and the conversion module 20 is not needed, and the difficulty of maintenance and repair of the energy storage device is further reduced. Further, the first electrical connecting member 1012 and the second electrical connecting member 2012 can be pins.

[0060] Optionally, the first plug-in part 101 comprises a first plug-in slot 1011, and the first electrical connecting member 1012 is arranged in the first plug-in slot 1011. The second plug-in part 201 comprises a second plug-in slot 2011, and the second electrical connecting member 2012 is arranged in the second plug-in slot 2011.

[0061] Specifically, the first plug-in slot 1011 is arranged on the shell of the battery module 10, the first electric connecting piece 1012 is arranged in the first plug-in slot 1011, the first plug-in slot 1011 plays a protective role for the first electric connecting piece 1012, the second plug-in slot 2011 is arranged on the conversion shell 206 of the conversion module 20, the second electric connecting piece 2012 is arranged in the second plug-in slot 2011, and the second plug-in slot 2011 plays a protective role for the second electric connecting piece 2012.

[0062] As shown in Figure 2 and Figure 3 , the second plug-in slot 2011 is a ring-shaped plug-in structure, the first plug-in slot 1011 is adapted to the structure of the ring-shaped plug-in structure, so that the first plug-in slot 1011 can limit the second plug-in slot 2011, and then the second plug-in slot 2011 can be inserted into the first plug-in slot 1011.

[0063] In other embodiments, the first plug-in slot 1011 can also be arranged as a ring-shaped plug-in structure, and the second plug-in slot 2011 is adapted to the first plug-in slot 1011 and the ring-shaped plug-in structure, so that the second plug-in slot 2011 can be inserted into the first plug-in slot 1011.

[0064] Optionally, the first plug-in slot 1011 or the second plug-in slot 2011 is connected with a sealing piece 205, and the sealing piece 205 is used for sealing the first plug-in slot 1011 and the second plug-in slot 2011. In actual application, by arranging the sealing piece 205 on the first plug-in slot 1011 or the second plug-in slot 2011, when the first plug-in slot 1011 and the second plug-in slot 2011 are plugged, the sealing piece 205 can seal the gap between the first plug-in slot 1011 and the second plug-in slot 2011, avoid external moisture entering the inside of the first plug-in slot 1011 and the second plug-in slot 2011 through the gap, and improve the safety of the energy storage device.

[0065] As shown in Figure 2 , in some optional embodiments, the sealing piece 205 can be arranged on the outside of the second plug-in slot 2011. Specifically, the sealing piece 205 can be a sealing ring, and the sealing ring is sleeved on the outside of the second plug-in slot 2011. When the second plug-in slot 2011 is inserted into the first plug-in slot 1011, the sealing ring can fill the gap between the first plug-in slot 1011 and the second plug-in slot 2011, avoid external moisture entering the inside of the first plug-in slot 1011 and the second plug-in slot 2011 through the gap, and improve the safety of the energy storage device. Moreover, since the sealing surface between the conversion modules 20 and the battery modules 10 is only a plane with the size of the circumference of the sealing ring, the sealing surface is small, and the sealing reliability is high.

[0066] In some alternative embodiments, the sealing member 205 can be arranged inside the first insertion slot, and in particular, the sealing member 205 can be a sealing gasket which can be attached to the inner wall of the first insertion slot, so that when the second insertion slot 2011 is inserted into the first insertion slot 1011, the sealing gasket can also fill the gap between the first insertion slot 1011 and the second insertion slot 2011, thereby playing a sealing role.

[0067] With reference to Figure 1 , Figure 2 and Figures 6-9 , optionally, the battery module 10 comprises a target surface 103 and a side surface 104 adjacent to the target surface 103, and the first insertion part 101 is connected to any one of the target surface 103 and the side surface 104, wherein the target surface 103 is the surface with the largest area of the battery module 10.

[0068] In particular, the battery module 10 is rectangular, and the rectangular battery module 10 comprises a plurality of surfaces, the target surface 103 is one of the plurality of surfaces of the battery module 10 with the largest area, and the side surface 104 is one of the surfaces adjacent to the target surface 103; the first insertion part 101 can be arranged on the target surface 103, and in this case, the conversion module 20 is connected to the target surface 103 of the battery module 10, or the first insertion part 101 can be arranged on the side surface 104, and the conversion module 20 can be connected to the side surface 104 of the battery module 10.

[0069] In a specific application, by arranging the first insertion part 101 on any one of the target surface 103 or the side surface 104, the installation position of the conversion module 20 can be selected according to actual needs, thereby improving design flexibility.

[0070] As a preferred embodiment, as shown in Figures 1-3 , the first insertion part 101 can be arranged on the target surface 103, which is one of the side surfaces of the rectangular battery module 10 with the largest area, and when the conversion module 20 is connected to the first insertion part 101, the conversion module 20 is located on the largest surface of the battery module 10, and in actual application, since the target surface 103 has the largest area, the volume of the conversion module 20 can also be increased accordingly, which can increase the heat dissipation area of the energy storage unit, thereby improving the heat dissipation effect of the energy storage unit. Moreover, the target surface 103 can be the back surface of the battery module 10, i.e., the conversion module 20 is located on the back surface of the battery module 10, which can improve the aesthetic appearance of the front surface of the energy storage unit 1.

[0071] Further, on the target surface 103 or the side surface 104, the first plug-in part 101 can be arranged on different sides of the target surface 103 or the side surface 104, or the second plug-in part 201 can be arranged on different sides of the conversion module 20, so that the plug-in direction of the conversion module 20 is different when the conversion module 20 is plugged on the battery module 10. The plug-in direction of the conversion module 20 can be set according to actual needs, improving the design flexibility. Exemplarily, Figure 6 is that the first plug-in part 101 is arranged on the lower side of the target surface 103, Figure 7 is that the first plug-in part 101 is arranged on the left side of the target surface 103, Figure 8 is that the second plug-in part 201 is arranged on the lower side of the conversion module 20, Figure 9 is that the first plug-in part 101 is arranged on the lower side of the side surface 104.

[0072] It should be noted that, Figures 6-9 The different arrangement modes of the first plug-in part 101 are only exemplary. The specific arrangement position of the first plug-in part 101 is not limited in the embodiments of the application, and can be selected according to actual needs.

[0073] Optionally, a handle 204 is arranged on the side of the conversion module 20 away from the second plug-in part 201.

[0074] Specifically, the handle 204 is fixedly arranged on the conversion module 20. The handle 204 is designed so that a technician can more conveniently grasp and move the conversion module 20 when installing, adjusting the position or performing maintenance, especially in the scenario of needing to regularly check or quickly replace the module, thereby improving the work efficiency.

[0075] Optionally, a guide rail 30 is connected to the battery module 10, and a sliding block 203 is arranged on the conversion module 20, and the sliding block 203 is slidingly connected to the guide rail 30.

[0076] Specifically, the guide rail is fixedly connected to the battery module 10, and the sliding block 203 is arranged on the conversion module 20, and the sliding block 203 is slidingly connected to the guide rail 30. In actual application, the installation and disassembly process of each module is greatly simplified through the cooperation of the guide rail and the sliding block 203, without the need for complex tool assistance, and a single person can complete the operation. When the conversion module 20 needs to be repaired or upgraded, the operator only needs to simply slide the conversion module 20 along the guide rail 30, thereby shortening the maintenance operation time, reducing the difficulty of the maintenance operation, and improving the usability and response speed of the overall system.

[0077] Optionally, the guide rail 30 includes a first connecting part 301, a second connecting part 302, and a third connecting part 303 connected vertically in sequence. The first connecting part 301 is fixedly connected to the battery module 10. The second connecting part 302, the third connecting part 303, and the battery module 10 together define a receiving cavity, and the slider 203 moves within the receiving cavity.

[0078] Specific references Figure 5 The guide rail 30 has a plate-like structure, with one side of the plate-like guide rail 30 facing upwards. Figure 5 The first connecting part 301 is formed by vertically bending the middle part (up and down direction), the second connecting part 302 is formed without bending the middle part, and the third connecting part 303 is formed by vertically bending the other side downwards. Thus, the first connecting part 301 is perpendicular to the second connecting part 302, and the second connecting part 302 is perpendicular to the third connecting part 303. The first connecting part 301 is fixedly connected to the battery module 10, and the guide rail 30 is fixed to the battery module 10. The bottom surface of the second connecting part 302 and the side surface 104 of the third connecting part 303 form a receiving cavity, and the slider 203 moves within the receiving cavity. The position of the slider 203 is defined by the second connecting part 302 and the third connecting part 303, thereby allowing the conversion module 20 to be movably connected to the battery module 10. In this embodiment, the second connecting part 302 and the third connecting part 303 are used to define the slider 203, making the structure of the guide rail 30 simpler, thus simplifying the structure of the energy storage unit 1 and reducing its cost.

[0079] Furthermore, the first connecting part 301 can be fixed to the outer shell of the battery module 10 by means of screw fixing, welding or other fixing methods. This application embodiment does not make specific limitations in this regard.

[0080] Optionally, there are two guide rails 30, which are connected to the battery module 10 at intervals.

[0081] Specifically, there are two guide rails 30, symmetrically arranged on both sides of the battery module 10 along its axis. Correspondingly, there are also two sliders 203, which move between the two guide rails 30. In this embodiment, the precise positioning and guidance of the guide rails 30 make the installation and disassembly of the conversion module 20 more intuitive and convenient. Operators can easily align the guide rails 30 and slide the sliders 203 to complete the installation without complicated alignment operations, saving manpower and time costs and further reducing the maintenance difficulty of the conversion module 20.

[0082] Optionally, a limiting member 40 is further included, which is arranged on the side of the guide rail 30 and the sliding block 203 away from the first plug-in part 101, and is used for fixing the sliding block 203 after the sliding block 203 stops moving on the guide rail 30, so as to limit the sliding block. In actual application, the arrangement of the limiting member 40 ensures that the moving range of the sliding block 203 on the guide rail 30 is strictly limited, avoids the potential risk of the sliding block 203 deviating from the guide rail 30, and enhances the safety of the system.

[0083] In some embodiments, the limiting member 40 includes a first fixing part 401, a second fixing part 402 and a fastener 403. The side of the guide rail 30 away from the first plug-in part 101 extends outward to form the first fixing part 401. The side of the sliding block 203 away from the first plug-in part 101 extends outward to form the second fixing part 402. The first fixing part 401 and the second fixing part 402 are superimposed. The fastener 403 passes through the first fixing part 401 and the second fixing part 402 in sequence to fix the sliding block 203.

[0084] Specifically, as shown in Figure 5 The first fixing part 401 is arranged on the side of the guide rail 30 away from the first plug-in part 101 and is formed by the guide rail 30 extending outward. The second fixing part 402 is arranged on the side of the sliding block 203 away from the first plug-in part 101 and is formed by the sliding block 203 extending outward. The sliding block 203 moves in the guide rail 30, so that the first fixing part 401 and the second fixing part 402 are superimposed. The fastener 403 passes through the first fixing part 401 and the second fixing part 402, so that the sliding block 203 is fixed. In actual application, the first fixing part 401 and the second fixing part 402 are respectively formed by the guide rail 30 and the sliding block 203 extending outward, which realizes the limiting of the sliding block 203, and thus no additional components are needed, so that the structure of the energy storage unit 1 is simpler and the cost is saved. In addition, the fastener 403 passes through the first fixing part 401 and the second fixing part 402 to fix the sliding block 203, and the first fixing part 401 and the second fixing part 402 can be disassembled, which improves the operation convenience of connecting or disassembling the first fixing part 401 and the second fixing part 402.

[0085] Further, the fastener 403 can be a nut 4031 and a screw 4032. The nut 4031 is arranged on the second fixing part 402, and the screw 4032 is connected to the nut 4031 by passing through the first fixing part 401 and the second fixing part 402.

[0086] In summary, the energy storage unit described in the embodiments of the present application can at least have the following advantages:

[0087] In the embodiment of the present application, the conversion module 20 is detachably connected to the battery module 10. When the conversion module 20 needs to be replaced or repaired, the conversion module 20 is directly detached from the battery module 10 for repair or replacement of the conversion module 20, thereby reducing the difficulty of maintenance and repair of the energy storage device. In addition, the conversion module 20 is separated from the battery module 10 to form a separate compartment structure, so that the two compartments are relatively independent, thereby reducing the influence of heat exchange between the two compartments on the entire energy storage device and prolonging the service life of each electronic and electrical component inside the energy storage unit 1.

[0088] The embodiment of the present application also provides a conversion module 20 which is detachably connected to a terminal device and is adapted to be electrically connected to the terminal device. The conversion module 20 is used to convert the voltage provided by the terminal device.

[0089] Specifically, the conversion module 20 can be a direct current-direct current converter or a direct current-alternating current converter. The conversion module 20 can be detachably connected to a terminal device. The terminal device can provide voltage. The conversion module 20 can convert the voltage provided by the terminal device. In this way, when the conversion module 20 needs to be replaced or repaired, the conversion module 20 is directly detached from the terminal device for repair or replacement of the conversion module 20, thereby reducing the difficulty of maintenance and repair of the terminal device and the conversion module 20.

[0090] The terminal device can be the battery module 10 in the energy storage unit 1 described in the above embodiments or other devices which can provide voltage. The embodiment of the present application does not make specific limitation on this.

[0091] It should be noted that in the embodiment of the present application, the method of detachable connection between the terminal device and the conversion module 20 is the same as the method of detachable connection between the conversion module 20 and the battery module 10 in the energy storage unit 1 in the above embodiments, and the beneficial effects are similar, which will not be described here.

[0092] The embodiment of the present application also provides an energy storage device. Referring to Figure 10 , a structure schematic diagram of an energy storage device according to the embodiment of the present application is shown. The energy storage device can specifically include the energy storage unit 1 according to any one of the above embodiments.

[0093] It should be noted that in the embodiment of the present application, the structure of the energy storage unit 1 is the same as that of the energy storage unit 1 in any one of the above embodiments, and the beneficial effects are similar, which will not be described here.

[0094] Optionally, as Figure 10As shown, the energy storage unit 1 is at least two, at least two energy storage units 1 are stacked and distributed, and electrically connected between adjacent two battery modules 10.

[0095] Specifically, at least two energy storage units 1 are stacked, and electrically connected between adjacent two battery modules 10, so that the battery modules 10 in the plurality of energy storage units 1 are connected to each other. In practical application, the plurality of energy storage units 1 can flexibly adjust the capacity and voltage of the energy storage device according to the actual needs of the user, and can be realized by simply adding more energy storage units 1 whether it is to increase the capacity or the voltage, thereby improving the scalability and adaptability of the energy storage device.

[0096] Optionally, the adjacent two battery modules 10 are detachably connected. In practical application, by making the adjacent two battery modules 10 detachably connected, the user can add or remove the battery modules 10 according to the actual needs, flexibly adjust the capacity and voltage of the energy storage unit, and when a certain battery module 10 fails, the failed battery module 10 can be directly disassembled and replaced without disassembling the entire energy storage device, thereby reducing the maintenance cost and time.

[0097] Optionally, as shown, Figures 1-10 The end faces of the adjacent two battery modules 10 are in contact with each other, one of the end faces is provided with a third plug-in part 102, and the other end face is provided with a fourth plug-in part, the third plug-in part 102 is provided with a third electrical connection part, and the fourth plug-in part is provided with a fourth electrical connection part, and the third electrical connection part and the fourth electrical connection part are electrically connected when the third plug-in part 102 and the fourth plug-in part are plugged into each other.

[0098] Specifically, the adjacent two battery modules 10 are connected by plugging, and the adjacent two end faces of the adjacent two battery modules 10 are provided with a third plug-in part 102 and a third electrical connection part on one end face and a fourth plug-in part and a fourth electrical connection part on the other end face. The third plug-in part 102 of one battery module 10 and the fourth plug-in part of the adjacent battery module 10 can be plugged into each other, and the third electrical connection part of one battery module 10 can be electrically connected with the fourth electrical connection part of the adjacent battery module 10. In practical application, the two battery modules 10 are connected by plugging, so that the installation process is very fast and simple, and when the battery module needs to be maintained or replaced, it can be quickly disassembled, thereby reducing the maintenance time.

[0099] Specifically, the third plug-in part includes a third plug-in slot 1021 and a third electrical connection part 1022, the third plug-in slot 1021 is arranged on the end face, and the third electrical connection part 1022 is arranged in the third plug-in slot to protect the third electrical connection part 1022.

[0100] It should be noted that the structure of the fourth plug-in part, the third plug-in part 102, the third electrical connection and the fourth electrical connection can be set according to specific circumstances. The present embodiment does not make specific limitations on this.

[0101] As shown in Figure 10 Optionally, the energy storage device further comprises a control module 2, which is connected to the energy storage unit 1 and electrically connected with the energy storage unit 1.

[0102] Specifically, the control module 2 is stacked above the battery module 10, and the control module 2 can be used to monitor the state of the battery module 10, and by continuously monitoring the voltage, current, temperature and other parameters of the battery module 10, it can ensure that all battery modules 20 work within a safe and efficient range. Implement battery management algorithms, including ensuring that the state of charge of the battery module 20 is consistent, avoiding overcharging, overdischarging, excessively high or low temperature, etc., and prolonging the service life of the battery module 10.

[0103] In some optional embodiments, the energy storage device further comprises a base 3 connected to the energy storage unit 1, and an interlocking piece 4 connected to the energy storage unit 1 and / or the base 3.

[0104] The base 3 is connected below the battery module 10, and the base 3 is used to carry the energy storage unit 1, avoiding direct contact of the battery module 10 with the bottom surface, and improving the use safety of the battery module 10.

[0105] The interlocking piece 4 can be connected to the battery module 10 or the base 3, or both the battery module 10 and the base 3 can be provided with the interlocking piece 4. The interlocking piece 4 can be connected with other fixing devices, which means devices that cannot be moved at will, to fix the energy storage device and avoid accidental movement or dumping of the energy storage device, thereby improving the safety and stability of the energy storage device.

[0106] For example, the other fixing device can be a wall, and the interlocking piece 4 can be fixedly connected to the wall to fix the energy storage device.

[0107] In some optional embodiments, the interlocking piece 4 comprises a bracket, one side of the bracket is fixedly connected to the battery module 10 or the base 3, and the other side of the bracket is provided with a hole or a clamping groove matched with a pre-buried piece in the other fixing device. By connecting the pre-buried piece to the hole or the clamping groove, the energy storage device can be closely connected with the wall. The pre-buried piece can be an expansion bolt.

[0108] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0109] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An energy storage unit, characterized by, The energy storage unit (1) comprises: a battery module (10); and a conversion module (20) detachably connected to and electrically connected with the battery module (10), the conversion module (20) being used for converting the voltage provided by the battery module (10).

2. The energy storage unit of claim 1, wherein, The battery module (10) comprises a first plug-in part (101), and the conversion module (20) comprises a second plug-in part (201), the first plug-in part (101) and the second plug-in part (201) being plugged into each other.

3. The energy storage cell of claim 2, wherein, The first plug-in part (101) and the second plug-in part (201) are hot-plug connected.

4. The energy storage cell of claim 2, wherein, The first plug-in part (101) is provided with a first electrical connector (1012) therein, and the second plug-in part (201) is provided with a second electrical connector (2012) therein, the first electrical connector (1012) and the second electrical connector (2012) being electrically connected when the first plug-in part (101) and the second plug-in part (201) are plugged into each other.

5. The energy storage unit of claim 4, wherein, The first plug-in part (101) comprises a first plug-in slot (1011), and the first electrical connector (1012) is arranged in the first plug-in slot (1011), the second plug-in part (201) comprises a second plug-in slot (2011), and the second electrical connector (2012) is arranged in the second plug-in slot (2011).

6. The energy storage unit of claim 5, wherein, A sealing member (205) is connected to the first plug-in slot (1011) or the second plug-in slot (2011), and the sealing member (205) is used for sealing the first plug-in slot (1011) and the second plug-in slot (2011).

7. The energy storage cell of claim 2, wherein, The battery module (10) comprises a target surface (103) and a side surface (104) adjacent to the target surface (103), and the first plug-in part (101) is connected to any one of the target surface and the side surface, wherein the target surface is the surface with the largest area of the battery module (10).

8. The energy storage cell of claim 2, wherein, A handle (204) is arranged on a side of the conversion module (20) away from the second plug-in part (201).

9. The energy storage cell of claim 2, wherein, A guide rail (30) is connected to the battery module (10), and a sliding block (203) is arranged on the conversion module (20), and the sliding block (203) is slidingly connected to the guide rail (30).

10. The energy storage cell of claim 9, wherein, The guide rail (30) comprises a first connecting part (301), a second connecting part (302) and a third connecting part (303) connected in sequence and perpendicularly, the first connecting part (301) is fixedly connected to the battery module (10), and the second connecting part (302), the third connecting part (303) and the battery module (10) jointly define a receiving cavity, and the sliding block (203) moves in the receiving cavity.

11. The energy storage cell of claim 9, wherein, There are two guide rails (30), and the two guide rails (30) are spaced apart and connected to the battery module (10).

12. The energy storage cell of claim 9, wherein, Further comprising a limiting member (40), which is arranged on the side of the guide rail (30) and the sliding block (203) away from the first plug-in part (101), and is used for fixing the sliding block (203) after the guide rail (30) stops moving, so as to limit the sliding block (203).

13. The energy storage unit of claim 12, wherein, The limiting member (40) comprises a first fixing part (401), a second fixing part (402) and a fastener (403), the side of the guide rail (30) away from the first plug-in part (101) extends outward to form the first fixing part (401), the side of the sliding block (203) away from the first plug-in part (101) extends outward to form the second fixing part (402), the first fixing part (401) and the second fixing part (402) are superimposed, and the fastener (403) passes through the first fixing part (401) and the second fixing part (402) in sequence to fix the sliding block (203).

14. The energy storage cell of any one of claims 1-13, wherein, The conversion module (20) comprises any one of a direct-current-direct-current converter and a direct-current-alternating-current converter.

15. A conversion module characterized by The conversion module (20) is detachably connected to a terminal device and is adapted to be electrically connected to the terminal device, and is used for converting the voltage provided by the terminal device.

16. An energy storage device, characterized by The energy storage device comprises the energy storage unit according to any one of claims 1-14.

17. The energy storage device of claim 16, wherein, The energy storage unit (1) is at least two, and the at least two energy storage units (1) are stacked and distributed, and electrically connected between adjacent two battery modules (10).

18. The energy storage device of claim 17, wherein, The adjacent two battery modules (10) are detachably connected.

19. The energy storage device of claim 18, wherein, The end faces of the adjacent two battery modules (10) contact each other, one of the end faces is provided with a third plug-in part (102), the other end face is provided with a fourth plug-in part, the third plug-in part (102) is provided with a third electric connecting member (1022), and the fourth plug-in part is provided with a fourth electric connecting member, the third electric connecting member (1022) and the fourth electric connecting member are electrically connected when the third plug-in part (102) and the fourth plug-in part are plugged into each other.

20. The energy storage device of claim 16, wherein, The energy storage device further comprises a control module (2), which is connected to the energy storage unit (1) and electrically connected to the battery module (10).

21. The energy storage device of claim 16, wherein, The energy storage device further comprises a base (3), which is connected to the energy storage unit (1). And an interlocking member (4) connected to the energy storage unit (1) or the base (3).

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