A battery box

Abstract

The utility model relates to battery box technical field, more particularly, relate to a battery box. Include: first frame subassembly, first frame subassembly includes first frame unit and energy storage unit, energy storage unit with first frame unit is detachable connection, second frame subassembly, second frame subassembly includes second frame unit and heat dissipation device, heat dissipation device with second frame unit is detachable connection, first frame unit along its height direction one end with second frame unit is detachable connection, energy storage unit with heat dissipation device is detachable intercommunication. In this way, the problem that the existing battery box needs to spend more transportation time and transportation cost in the process of installing heat dissipation device and battery pack, and the installation efficiency is lower is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery box technology, and more specifically, to a battery box. Background Technology

[0002] The on-board battery box is a key supporting structure for electric vehicle battery systems. Its main function is to provide physical fixation, safety assurance, and environmental adaptability support for battery modules, directly affecting the stability, safety, and overall vehicle performance of the battery system. Most existing battery boxes are single units, housing cooling devices, battery packs, and other connecting devices. During installation, the entire battery box is first transported to the cooling device manufacturer for installation, and then transported to the battery pack installation site for installation. This method of installing the cooling device and battery pack in stages incurs significant transportation time and costs, and has low installation efficiency. Utility Model Content

[0003] To address the problems of high transportation time and costs, and low installation efficiency, in existing battery boxes during the installation of heat dissipation devices and battery packs, this utility model provides a battery box comprising:

[0004] A first frame assembly, comprising a first frame unit and an energy storage unit; the energy storage unit is detachably connected to the first frame unit.

[0005] The second frame assembly includes a second frame unit and a heat dissipation device; the heat dissipation device is detachably connected to the second frame unit; one end of the first frame unit along its height direction is detachably connected to the second frame unit; the energy storage unit is detachably connected to the heat dissipation device.

[0006] In some embodiments, the first frame unit includes a first frame body, a first mounting slot, and a plurality of second mounting slots; the first frame body is formed by a plurality of elongated strips; the first mounting slot and the plurality of second mounting slots are arranged sequentially along the height direction of the first frame body; the energy storage unit includes a first battery pack and a second battery pack; the first mounting slot extends along the length direction of the first frame body from the inner surface of one end to the inner surface of the other end; the second mounting slot extends along the length direction of the first frame body from the inner surface of one end to the inner surface of the other end; the distance between the first mounting slot and the second frame unit is less than the distance between the second mounting slot and the second frame unit; One end of the first frame body along its height direction is detachably connected to the second frame unit; the height of the first mounting slot is less than the height of the second mounting slot; the length of the first battery pack is less than the length of the first mounting slot; the height of the first battery pack is greater than the height of the first mounting slot; the width of the first battery pack is less than the width of the first mounting slot; the first battery pack is located in the first mounting slot and connected to the first frame body; the width of the second battery pack is less than the width of the second mounting slot; the height of the second battery pack is less than the height of the second mounting slot; the second battery pack is located in the second mounting slot and connected to the first frame body; the heat dissipation device is connected to both the first battery pack and the second battery pack.

[0007] In some embodiments, the first frame assembly further includes a connector; the first frame unit further includes a third mounting slot; the third mounting slot extends from the inner surface of one end of the first frame body to the inner surface of the other end along the length direction of the first frame body; the first mounting slot, the second mounting slot, and the third mounting slot are arranged sequentially along the height direction of the first frame body; the distance between the third mounting slot and the first mounting slot is greater than the distance between the second mounting slot and the first mounting slot; the connector is located in the third mounting slot and is detachably connected to the first frame body; the connector is electrically connected to the first battery pack and the second battery pack respectively.

[0008] In some embodiments, the first frame unit further includes two sets of fastening units; the two sets of fastening units are detachably connected to both ends of the first frame body along its length.

[0009] In some embodiments, the fastening unit includes a plurality of triangular plates and a plurality of diagonal braces; the plurality of triangular plates are detachably connected to the corners at both ends of the first frame body along its length direction; one end of the diagonal brace is detachably connected to one of the triangular plates, and the other end is detachably connected to another triangular plate; wherein the two triangular plates are arranged diagonally.

[0010] In some embodiments, the diagonal tie rod is spaced apart from the second mounting slot; the length of the second battery pack is greater than the length of the second mounting slot; and the second battery pack is spaced apart from the diagonal tie rod.

[0011] In some embodiments, the second frame unit includes a second frame body and a fourth mounting slot; the second frame body is formed by multiple long strips; the fourth mounting slot extends along the length direction of the second frame body from the inner surface of one end to the inner surface of the other end; one end of the second frame body along its height direction is detachably connected to the first frame body; the heat dissipation device is located in the fourth mounting slot and is detachably connected to the second frame body; the heat dissipation device is detachably connected to the first battery pack and the second battery pack respectively.

[0012] In some embodiments, the fourth mounting slot is connected to the first mounting slot; the length of the fourth mounting slot is greater than or equal to the length of the first mounting slot; and the width of the fourth mounting slot is greater than or equal to the width of the first mounting slot.

[0013] In some embodiments, the length of the first frame body is equal to the length of the second frame body; the width of the first frame body is equal to the width of the second frame body.

[0014] In some embodiments, the heat dissipation device includes a cooler, a controller, and a fan; the cooler, the controller, and the fan are located in the fourth mounting slot and connected to the second frame body; the controller is electrically connected to the cooler and the fan respectively; the cooler is detachably connected to the first battery pack and the second battery pack respectively.

[0015] To address the issues of high transportation time and costs, and low installation efficiency, in existing battery boxes during the installation of heat dissipation devices and battery packs, this invention offers the following advantages:

[0016] By dividing the battery box into a first frame assembly and a second frame assembly, the first frame assembly includes a first frame unit and an energy storage unit; the energy storage unit is detachably connected to the first frame unit; the second frame assembly includes a second frame unit and a heat dissipation device; the heat dissipation device is detachably connected to the second frame unit; one end of the first frame unit along its height direction is detachably connected to the second frame unit; and the energy storage unit and the heat dissipation device are detachably connected, thereby enabling the first frame unit and the second frame unit to be separated and transported to different locations for installation of the energy storage unit and the heat dissipation device. This not only increases the loading capacity of the first frame unit and the second frame unit, but also saves transportation time and costs, and improves assembly efficiency. Attached Figure Description

[0017] Figure 1 This is a front view of a battery box;

[0018] Figure 2 This is a three-dimensional view of a battery box;

[0019] Figure 3 This is a left view of a battery box;

[0020] Figure 4 This is a right view of a battery box.

[0021] Reference numerals: 01, First frame assembly; 11, First frame unit; 111, First frame body; 112, First mounting slot; 113, Second mounting slot; 114, Third mounting slot; 12, Energy storage unit; 121, First battery pack; 122, Second battery pack; 13, Connector; 14, Fastening unit; 141, Triangular plate; 142, Diagonal tie rod; 02, Second frame assembly; 21, Second frame unit; 211, Second frame body; 212, Fourth mounting slot; 22, Heat dissipation device; 221, Cooler; 222, Controller; 223, Fan. Detailed Implementation

[0022] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0023] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0024] The on-board battery box is a key supporting structure for electric vehicle battery systems. Its main function is to provide physical fixation, safety assurance, and environmental adaptability support for battery modules, directly affecting the stability, safety, and overall vehicle performance of the battery system. Most existing battery boxes are single units, with a heat dissipation device 22 and battery packs, among other connecting devices, mounted on them. During installation, the entire battery box is first transported to the heat dissipation device 22 manufacturer for installation, and then transported to the battery pack installation site for battery pack installation. This method of installing the heat dissipation device 22 and battery pack in stages incurs significant transportation time and costs, and has low installation efficiency. To address this problem, this utility model provides a battery box, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, it may include:

[0025] First frame assembly 01, the first frame assembly 01 includes a first frame unit 11 and an energy storage unit 12; the energy storage unit 12 is detachably connected to the first frame unit 11.

[0026] The second frame assembly 02 includes a second frame unit 21 and a heat dissipation device 22; the heat dissipation device 22 is detachably connected to the second frame unit 21; one end of the first frame unit 11 along its height direction is detachably connected to the second frame unit 21; the energy storage unit 12 is detachably connected to the heat dissipation device 22.

[0027] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the battery box includes a first frame assembly 01, which includes a first frame unit 11 and an energy storage unit 12. The energy storage unit 12 is detachably connected to the first frame unit 11. In this embodiment, the detachable connection between the energy storage unit 12 and the first frame unit 11 can be a bolt connection or a snap-fit ​​connection. Those skilled in the art will know that any detachable connection method described in this embodiment can be used as long as it is applicable to the scenario in which this utility model is located.

[0028] The second frame assembly 02 includes a second frame unit 21 and a heat dissipation device 22. The heat dissipation device 22 is detachably connected to the second frame unit 21. In this embodiment, the heat dissipation device 22 is a conventional device (e.g., a water chiller), and its structure will not be described in detail here. One end of the first frame unit 11 along its height direction is detachably connected to the second frame unit 21. In this embodiment, by separating the first frame unit 11 and the second frame unit 21 and transporting them to different locations to install the energy storage unit 12 and the heat dissipation device 22, the loading capacity of the first frame unit 11 and the second frame unit 21 can be increased, while saving transportation time and costs, and also improving assembly efficiency. In this embodiment, the energy storage unit 12 and the heat dissipation device 22 are detachably connected. Those skilled in the art will know that the heat dissipation device 22 is connected to the energy storage unit 12 by a pipe and delivers coolant to the energy storage unit 12 to remove the heat generated during the operation of the energy storage unit 12, thereby achieving cooling and heat dissipation of the energy storage unit 12.

[0029] In some embodiments, such as Figure 1 , Figure 2As shown, the first frame unit 11 includes a first frame body 111, a first mounting slot 112, and a plurality of second mounting slots 113; the first frame body 111 is formed by multiple long strips; the first mounting slot 112 and the plurality of second mounting slots 113 are arranged sequentially along the height direction of the first frame body 111; the energy storage unit 12 includes a first battery pack 121 and a second battery pack 122; the first mounting slot 112 extends from the inner surface of one end of the first frame body 111 to the inner surface of the other end along the length direction of the first frame body 111; the second mounting slots 113 extend from the inner surface of one end of the first frame body 111 to the inner surface of the other end along the length direction of the first frame body 111; the distance between the first mounting slot 112 and the second frame unit 21 is less than the distance between the second mounting slot 113 and the second frame unit 21; the first frame body 111... One end of the body 111 along its height direction is detachably connected to the second frame unit 21; the height of the first mounting slot 112 is less than the height of the second mounting slot 113; the length of the first battery pack 121 is less than the length of the first mounting slot 112; the height of the first battery pack 121 is greater than the height of the first mounting slot 112; the width of the first battery pack 121 is less than the width of the first mounting slot 112; the first battery pack 121 is located in the first mounting slot 112 and connected to the first frame body 111; the width of the second battery pack 122 is less than the width of the second mounting slot 113; the height of the second battery pack 122 is less than the height of the second mounting slot 113; the second battery pack 122 is located in the second mounting slot 113 and connected to the first frame body 111; the heat dissipation device 22 is connected to the first battery pack 121 and the second battery pack 122 respectively.

[0030] In this embodiment, as Figure 1 , Figure 2 As shown, the first frame unit 11 includes a first frame body 111, a first mounting groove 112, and multiple second mounting grooves 113. The first frame body 111 is formed by multiple long strips joined together, which can be square tubes and / or angle steel. Those skilled in the art will know that a frame unit like this can be constructed by welding or bolting the square tubes and / or angle steel together. Figure 1 , Figure 2 The first frame body 111 shown; as Figure 1 , Figure 2As shown, the first mounting slot 112 and multiple second mounting slots 113 are arranged sequentially along the height direction of the first frame body 111. In this embodiment, the distance between the multiple second mounting slots 113 can be equal or unequal, and the specific distance can be set according to the actual scenario. In this embodiment, the energy storage unit 12 includes a first battery pack 121 and a second battery pack 122. The first mounting slot 112 extends from the inner surface of one end of the first frame body 111 to the inner surface of the other end along the length direction of the first frame body 111. The second mounting slots 113 extend from the inner surface of one end of the first frame body 111 to the inner surface of the other end along the length direction of the first frame body 111. The distance between the first mounting slot 112 and the second frame unit 21 is... The distance between the second mounting slot 112 and the second frame unit 21 is less than the distance between the second mounting slot 113 and the second frame unit 21. One end of the first frame body 111 along its height direction is detachably connected to the second frame unit 21. The height of the first mounting slot 112 is less than the height of the second mounting slot 113. In this embodiment, since the total height of the battery box needs to remain as constant as possible, those skilled in the art will know that when the battery box is divided into the first frame assembly 01 and the second frame assembly 02, in order to ensure the stability of the first frame assembly 01 and the second frame assembly 02, more material will be added to stabilize the first frame assembly 01 and the second frame assembly 02, thereby making the first frame assembly... Component 01 and the second frame assembly 02 can have a relatively stable structure, but this may increase the overall height of the battery box. Therefore, in order to keep the overall height of the battery box as constant as possible, the height of the first mounting slot 112 is set to be less than the height of the second mounting slot 113. In order to ensure that the first battery pack 121 can be smoothly installed in the first mounting slot 112, the length of the first battery pack 121 is set to be less than the length of the first mounting slot 112. In order to make full use of the space between the first frame assembly 01 and the second frame assembly 02, the height of the first battery pack 121 is set to be greater than the height of the first mounting slot 112. The width of the first battery pack 121 is less than the width of the first mounting slot 112. Battery pack 121 is located in the first mounting slot 112 and connected to the first frame body 111. Thus, when the first battery pack 121 is hoisted and installed in the first mounting slot 112 by a hoisting machine, part of its volume will extend towards the second frame unit 21, fully utilizing the space between the second frame assembly 02 and the first frame assembly 01. The width of the second battery pack 122 is less than the width of the second mounting slot 113. The height of the second battery pack 122 is less than the height of the second mounting slot 113. The second battery pack 122 is located in the second mounting slot 113 and connected to the first frame body 111. In this embodiment, when installing the second battery pack 122, it can be pushed into the second mounting slot 113 from one side end.The heat dissipation device 22 is connected to the first battery pack 121 and the second battery pack 122 respectively. In this embodiment, the heat dissipation device 22 is detachably connected to the first battery pack 121 and the second battery pack 122 via pipes, thereby delivering coolant to the first battery pack 121 and the second battery pack 122 to cool them down. Since this heat dissipation method is a conventional technique in the art, it will not be described in detail in this invention.

[0031] In some embodiments, such as Figure 3 , Figure 4 As shown, the first frame assembly 01 further includes a connector 13; the first frame unit 11 further includes a third mounting slot 114; the third mounting slot 114 extends from the inner surface of one end of the first frame body 111 to the inner surface of the other end along the length direction of the first frame body 111; the first mounting slot 112, the second mounting slot 113, and the third mounting slot 114 are arranged sequentially along the height direction of the first frame body 111; the distance between the third mounting slot 114 and the first mounting slot 112 is greater than the distance between the second mounting slot 113 and the first mounting slot 112; the connector 13 is located in the third mounting slot 114 and is detachably connected to the first frame body 111; the connector 13 is electrically connected to the first battery pack 121 and the second battery pack 122 respectively.

[0032] In this embodiment, as Figure 1 , Figure 2 As shown, by setting connector 13, when the first battery pack 121 and the second battery pack 122 discharge to the outside, connector 13 can serve as an interface for external discharge. Since connector 13 is a conventional device in the art, its structure will not be described in detail in this embodiment.

[0033] In some embodiments, such as Figure 3 , Figure 4 As shown, the first frame unit 11 further includes two sets of fastening units 14; the two sets of fastening units 14 are detachably connected to both ends of the first frame body 111 along its length direction.

[0034] In this embodiment, as Figure 3 , Figure 4 As shown, the first frame assembly 01 also includes two sets of fastening units 14; the two sets of fastening units 14 are respectively connected to the two ends of the first frame body 111 along its length direction; the two sets of fastening units 14 can be connected to the first frame body 111 after the first battery pack 121 and the second battery pack 122 are installed on the first frame body 111.

[0035] In some embodiments, such as Figure 3 , Figure 4 As shown, the fastening unit 14 includes multiple triangular plates 141 and multiple diagonal braces 142; the multiple triangular plates 141 are detachably connected to the corners at both ends of the first frame body 111 along its length direction; one end of the diagonal brace 142 is detachably connected to one of the triangular plates 141, and the other end is detachably connected to another triangular plate 141; wherein, the two triangular plates 141 are arranged diagonally.

[0036] In this embodiment, as Figure 3 , Figure 4 As shown, the fastening unit 14 includes multiple triangular plates 141 and multiple diagonal braces 142; the multiple triangular plates 141 are respectively connected to the corners at both ends of the first frame body 111 along its length direction; in this embodiment, the triangular plates 141 can be detachably connected to the first frame body 111, for example, by bolts; in this embodiment, one end of the diagonal brace 142 is connected to one triangular plate 141, and the other end is connected to another triangular plate 141; wherein, the two triangular plates 141 are arranged diagonally, and by providing multiple triangular plates 141 and diagonal braces 142 on both ends of the first frame body 111 along its length direction, the stability of the first frame body 111 can be further enhanced. In this embodiment, as... Figure 3 , Figure 4 As shown, those skilled in the art will know that, in order to facilitate the installation of the tie rod 142, a slot can be made on some of the tie rods 142, and some of the tie rods 142 can be engaged in the slot during the installation process.

[0037] In some embodiments, such as Figure 1 , Figure 2 , Figure 3 As shown, the diagonal tie rod 142 is spaced apart from the second mounting slot 113; the length of the second battery pack 122 is greater than the length of the second mounting slot 113; the second battery pack 122 and the diagonal tie rod 142 are spaced apart.

[0038] In this embodiment, as Figure 1 , Figure 2 , Figure 3 As shown, by spacing the diagonal tie rod 142 and the second mounting slot 113 apart; the length of the second battery pack 122 is greater than the length of the second mounting slot 113; and the second battery pack 122 and the diagonal tie rod 142 are spaced apart, the length of the second battery pack 122 can be appropriately increased, thereby increasing the battery pack's energy storage capacity.

[0039] In some embodiments, such as Figure 1 , Figure 2As shown, the second frame unit 21 includes a second frame body 211 and a fourth mounting groove 212; the second frame body 211 is formed by multiple long strips; the fourth mounting groove 212 extends along the length direction of the second frame body 211 from the inner surface of one end of the second frame body 211 to the inner surface of the other end; one end of the second frame body 211 along its height direction is detachably connected to the first frame body 111; the heat dissipation device 22 is located in the fourth mounting groove 212 and is detachably connected to the second frame body 211; the heat dissipation device 22 is detachably connected to the first battery pack 121 and the second battery pack 122 respectively.

[0040] In some embodiments, such as Figure 1 , Figure 2 As shown, the fourth mounting groove 212 is connected to the first mounting groove 112; the length of the fourth mounting groove 212 is greater than or equal to the length of the first mounting groove 112; and the width of the fourth mounting groove 212 is greater than or equal to the width of the first mounting groove 112.

[0041] In this embodiment, as Figure 1 , Figure 2 As shown, the fourth mounting slot 212 is connected to the first mounting slot 112; the length of the fourth mounting slot 212 is greater than or equal to the length of the first mounting slot 112; the width of the fourth mounting slot 212 is greater than or equal to the width of the first mounting slot 112, thereby allowing a portion of the volume of the first battery pack 121 to smoothly extend into the fourth mounting slot 212 or extend out of the first mounting slot 112 and approach the fourth mounting slot 212. Appropriately increasing the length and / or width of the fourth mounting slot 212 can prevent the second frame body 211 from rubbing against the first battery pack 121 during use. Those skilled in the art should understand that increasing the length and / or width of the fourth mounting slot 212 should not affect the overall stability of the battery box.

[0042] In some embodiments, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the length of the first frame body 111 is equal to the length of the second frame body 211; the width of the first frame body 111 is equal to the width of the second frame body 211.

[0043] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the length of the first frame body 111 is equal to the length of the second frame body 211; the width of the first frame body 111 is equal to the width of the second frame body 211. By setting the first frame body 111 and the second frame body 211 in this way, the overall shape of the battery box can be made more regular, and the force on the first frame body 111 in its height direction can be more uniform, thereby ensuring the overall stability of the first frame body 111.

[0044] In some embodiments, such as Figure 1 , Figure 2 As shown, the heat dissipation device 22 includes a cooler 221, a controller 222, and a fan 223; the cooler 221, the controller 222, and the fan 223 are located in the fourth mounting slot 212 and connected to the second frame body 211; the controller 222 is electrically connected to the cooler 221 and the fan 223 respectively; the cooler 221 is detachably connected to the first battery pack 121 and the second battery pack 122 respectively.

[0045] In this embodiment, the controller 222 can control the activation of the fan 223 and the cooler 221. The cooler 221 delivers coolant to the first battery pack 121 and the second battery pack 122 to dissipate heat from the first battery pack 121 and the second battery pack 122. The fan 223 can expel the heat generated by the cooler 221 from the second frame body 211. Those skilled in the art will know that the heat dissipation device 22 may also include other components. Since the heat dissipation method of the heat dissipation device 22 for the first battery and the second battery pack 122 is a conventional technical means in the art, it will not be described in detail in this embodiment.

[0046] The working principle of this utility model is as follows:

[0047] When the battery box needs to be transported, the first frame unit 11 and the second frame unit 21 are separated and transported to different locations to install the energy storage unit 12 and the heat dissipation device 22. This not only increases the loading capacity of the first frame unit 11 and the second frame unit 21, but also saves transportation time and costs, and improves assembly efficiency.

[0048] When it is necessary to assemble a battery box, the first frame unit 11 containing the energy storage unit 12 and the second frame unit 21 containing the heat dissipation device 22 can be combined and connected together to obtain the required battery box.

[0049] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A battery box, characterized in that, The battery box includes: A first frame assembly, comprising a first frame unit and an energy storage unit; the energy storage unit is detachably connected to the first frame unit. The second frame assembly includes a second frame unit and a heat dissipation device; the heat dissipation device is detachably connected to the second frame unit; one end of the first frame unit along its height direction is detachably connected to the second frame unit; the energy storage unit is detachably connected to the heat dissipation device.

2. The battery box according to claim 1, characterized in that, The first frame unit includes a first frame body, a first mounting slot, and multiple second mounting slots; the first frame body is formed by multiple long strips; the first mounting slot and the multiple second mounting slots are arranged sequentially along the height direction of the first frame body; the energy storage unit includes a first battery pack and a second battery pack; the first mounting slot extends along the length direction of the first frame body from the inner surface of one end to the inner surface of the other end; the second mounting slot extends along the length direction of the first frame body from the inner surface of one end to the inner surface of the other end; the distance between the first mounting slot and the second frame unit is less than the distance between the second mounting slot and the second frame unit; the first frame... One end of the frame body along its height direction is detachably connected to the second frame unit; the height of the first mounting slot is less than the height of the second mounting slot; the length of the first battery pack is less than the length of the first mounting slot; the height of the first battery pack is greater than the height of the first mounting slot; the width of the first battery pack is less than the width of the first mounting slot; the first battery pack is located in the first mounting slot and connected to the first frame body; the width of the second battery pack is less than the width of the second mounting slot; the height of the second battery pack is less than the height of the second mounting slot; the second battery pack is located in the second mounting slot and connected to the first frame body; the heat dissipation device is connected to both the first battery pack and the second battery pack.

3. A battery box according to claim 2, characterized in that, The first frame assembly further includes a connector; the first frame unit further includes a third mounting slot; the third mounting slot extends from the inner surface of one end of the first frame body to the inner surface of the other end along the length direction of the first frame body; the first mounting slot, the second mounting slot, and the third mounting slot are arranged sequentially along the height direction of the first frame body; the distance between the third mounting slot and the first mounting slot is greater than the distance between the second mounting slot and the first mounting slot; the connector is located in the third mounting slot and is detachably connected to the first frame body; the connector is electrically connected to the first battery pack and the second battery pack respectively.

4. A battery box according to claim 3, characterized in that, The first frame unit further includes two sets of fastening units; the two sets of fastening units are detachably connected to both ends of the first frame body along its length.

5. A battery box according to claim 4, characterized in that, The fastening unit includes multiple triangular plates and multiple diagonal tie rods; the multiple triangular plates are detachably connected to the corners at both ends of the first frame body along its length direction; one end of each diagonal tie rod is detachably connected to one of the triangular plates, and the other end is detachably connected to another triangular plate; wherein, the two triangular plates are arranged diagonally.

6. A battery box according to claim 5, characterized in that, The diagonal tie rod is spaced apart from the second mounting slot; the length of the second battery pack is greater than the length of the second mounting slot; the second battery pack is spaced apart from the diagonal tie rod.

7. A battery box according to claim 2, characterized in that, The second frame unit includes a second frame body and a fourth mounting slot; the second frame body is formed by multiple long strips; the fourth mounting slot extends along the length of the second frame body from the inner surface of one end to the inner surface of the other end; one end of the second frame body along its height direction is detachably connected to the first frame body; the heat dissipation device is located in the fourth mounting slot and is detachably connected to the second frame body; the heat dissipation device is detachably connected to the first battery pack and the second battery pack respectively.

8. A battery box according to claim 7, characterized in that, The fourth mounting slot is connected to the first mounting slot; the length of the fourth mounting slot is greater than or equal to the length of the first mounting slot; the width of the fourth mounting slot is greater than or equal to the width of the first mounting slot.

9. A battery box according to claim 7, characterized in that, The length of the first frame body is equal to the length of the second frame body; the width of the first frame body is equal to the width of the second frame body.

10. A battery box according to claim 7, characterized in that, The heat dissipation device includes a cooler, a controller, and a fan; the cooler, the controller, and the fan are located in the fourth mounting slot and connected to the second frame body; the controller is electrically connected to the cooler and the fan respectively; the cooler is detachably connected to the first battery pack and the second battery pack respectively.

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