Energy storage device

Abstract

The utility model belongs to the technical field of energy storage, and discloses an energy storage device which comprises an energy storage module, a first connecting plate, a second connecting plate, a front cover and two side covers, the energy storage module comprises an energy storage shell and a battery module, the energy storage shell is installed on one side of the battery module in the first direction, and the first connecting plate is connected with the second connecting plate. The first connecting plate and the second connecting plate are respectively mounted on two sides of the battery module along the second direction, the front cover is positioned on the other side of the battery module along the first direction, and the two side covers are respectively positioned on two sides of the battery module along the third direction; the two sides, in the second direction, of each side cover are connected with the second connecting plate and the first connecting plate correspondingly. The two sides, in the first direction, of each side cover are connected with the energy storage shell and the front cover in a buckled mode respectively. The energy storage device is relatively simple in assembly process and relatively low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an energy storage device. Background Art

[0002] Existing energy storage devices usually include a shell and a battery module arranged inside the shell. During the assembly process, the battery module needs to be placed into the shell. Since the battery module is generally heavy, external equipment is required to assist in grabbing the battery module, and the battery module needs to be positioned after being placed in the shell. This makes the assembly of existing energy storage devices complicated and places high requirements on the structural strength of the load-bearing shell, thereby increasing the manufacturing cost of the energy storage device. Utility Model Content

[0003] The utility model aims to provide an energy storage device, the assembly process of which is relatively simple and the manufacturing cost is relatively low.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses an energy storage device, comprising: an energy storage module, the energy storage module comprising an energy storage shell and a battery module, the energy storage shell being installed on one side of the battery module along a first direction; a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate being respectively installed on both sides of the battery module along a second direction; a front cover, the front cover being located on the other side of the battery module along the first direction; two side covers, the two side covers being respectively located on both sides of the battery module along a third direction; the two sides of each side cover along the second direction are respectively connected to the second connecting plate and the first connecting plate; and the two sides of each side cover along the first direction are respectively connected to the energy storage shell and the front cover with buckles.

[0006] In some embodiments, the energy storage module further includes an inverter, the outer side of the inverter is surrounded by a metal shell, and the inverter is installed on a side of the battery module away from the energy storage shell in the first direction.

[0007] In some specific embodiments, the first connecting plate and the second connecting plate are respectively installed on both sides of the battery module and the metal housing along the second direction.

[0008] In some embodiments, the battery module includes: a plurality of battery cells and a battery cell holder, the battery cell holder is provided with a plurality of first receiving grooves; the energy storage shell is provided with a plurality of second receiving grooves, one end of the battery cell is received in the first receiving groove, and the other end of the battery cell is received in the second receiving groove, and the battery cell holder is connected to the energy storage shell to fix the battery cell.

[0009] In some embodiments, top mounting flanges are respectively provided on both sides of the first connecting plate along the third direction, and the top ends of the two side covers along the second direction are provided with first mounting portions corresponding to the top mounting flanges, and the top mounting flanges are connected to the first mounting portions via a first connecting member.

[0010] In some embodiments, the second connecting plate is provided with bottom mounting flanges on both sides along the third direction, and the bottom ends of the two side covers along the second direction are provided with second mounting portions corresponding to the bottom mounting flanges, and the bottom mounting flanges are connected to the second mounting portions via a second connecting member.

[0011] In some embodiments, each side cover is provided with a first latching protrusion and a second latching protrusion on both sides along the first direction; the energy storage shell is provided with a first latching hole that cooperates with the first latching protrusion on both sides along the third direction; and the front cover is provided with a second latching hole that cooperates with the second latching protrusion on both sides along the third direction.

[0012] In some embodiments, the energy storage device also includes: a top cover assembly, which is connected to the first connecting plate through a third connecting member and is connected to the two side covers through a fourth connecting member, and a handle is installed on the top cover assembly; a bottom cover assembly, which is connected to the second connecting plate through a fifth connecting member, and a walking wheel is installed on the bottom cover assembly.

[0013] In some specific embodiments, the top cover assembly includes: a top cover support, the top cover support is connected to the first connecting plate through the third connecting member, the top cover support is provided with an avoidance hole, the first connecting plate is provided with a protrusion corresponding to the avoidance hole, and the protrusion passes through the avoidance hole and is connected to the handle; a top cover, the top cover is clamped on the top cover support, the front cover and the energy storage shell.

[0014] In some specific embodiments, the bottom cover assembly includes a bottom cover, which is installed on the second connecting plate through the fifth connecting piece, and one of the bottom cover and the side cover is provided with a plug-in sleeve, and the other of the bottom cover and the side cover is provided with a plug-in column corresponding to the plug-in sleeve.

[0015] In some specific embodiments, one of the top cover assembly and the front cover is provided with a first guide protrusion, and the other of the top cover assembly and the front cover is provided with a first guide groove that cooperates with the first guide protrusion; the first guide protrusion and the first guide groove are both arranged along the second direction; and / or: one of the top cover assembly and the energy storage shell is provided with a second guide protrusion, and the other of the top cover assembly and the energy storage shell is provided with a second guide groove that cooperates with the second guide protrusion; the second guide protrusion and the second guide groove are both arranged along the second direction.

[0016] In some specific embodiments, the walking wheels include two front wheels and two rear wheels, the diameter of the rear wheels is larger than the diameter of the front wheels; the two front wheels are located below the front cover, and the two rear wheels are located below the energy storage shell;

[0017] The energy storage device further comprises a pull rod assembly, which is installed on a side of the energy storage shell away from the energy storage module, and the pull rod assembly comprises a retractable pull rod.

[0018] In some embodiments, a fixed edge extending along a third direction is provided on the first connecting plate, the fixed edge is connected to the energy storage shell via a sixth connecting member, and the second connecting plate is connected to the energy storage shell via a seventh connecting member.

[0019] The beneficial effects of the energy storage device of the utility model are as follows: in the actual assembly process, the energy storage module, the first connecting plate and the second connecting plate are connected as a whole, which serves as the main beam of the whole machine. The two side covers and the front cover are respectively installed on the main beam. Since the two side covers are connected with the energy storage shell and the front cover by snapping, the installation process of the energy storage device of this embodiment is similar to the assembly process of building blocks. Compared with the structure of placing the battery module into the box body in the prior art, the assembly of the energy storage device of this embodiment is very convenient. At the same time, since the first connecting plate and the second connecting plate are respectively installed on both sides of the battery module along the second direction, after the actual assembly is completed, the two side covers and the front cover are not load-bearing structures, and the strength requirements for them can be reduced during the manufacturing process, thereby reducing the manufacturing cost of the energy storage device.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the energy storage device of an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the exploded structure of the energy storage device of an embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the energy storage device of the embodiment of the utility model with the top cover assembly and the front cover removed;

[0024] Figure 4 yes Figure 3 An exploded schematic diagram of the structure shown;

[0025] Figure 5 It is a schematic structural diagram of the front cover and the side cover of the energy storage device of an embodiment of the utility model;

[0026] Figure 6 is a schematic diagram of the top structure of the energy storage device according to an embodiment of the utility model;

[0027] Figure 7 It is a schematic diagram of the matching structure of the energy storage module and the pull rod assembly of the embodiment of the utility model;

[0028] Figure 8 is Figure 7 A schematic diagram of the structure in which the left cover and the right cover are installed on the structure shown;

[0029] Fig. 9 is Figure 8 A schematic diagram of a structure in which a first connecting plate and a second connecting plate are installed on the structure shown;

[0030] Fig.10 is Fig. 9 A schematic diagram of the structure of installing the bottom cover assembly on the structure shown;

[0031] Fig.11 is Fig.10 A schematic diagram of the structure in which the top cover support and the handle are installed on the structure shown;

[0032] Fig.12 is Fig.11 Schematic diagram of the structure with the top cover installed on the structure shown.

[0033] Reference numerals:

[0034] 100, energy storage module; 110, energy storage shell; 111, first clamping hole; 112, fifth clamping hole; 113, second guide groove; 114, second receiving groove; 120, battery module; 121, battery cell; 122, battery cell bracket; 130, inverter; 131, metal shell;

[0035] 200, first connecting plate; 210, top mounting flange; 220, protruding portion; 230, fixing edge;

[0036] 300, second connecting plate; 310, bottom mounting flange;

[0037] 400, front cover; 410, second clamping hole; 420, fourth clamping hole; 430, first guide groove;

[0038] 500, side cover; 501, first mounting portion; 502, second mounting portion; 503, first latching protrusion; 504, second latching protrusion; 505, plug-in column; 510, left cover; 520, right cover;

[0039] 600, top cover assembly; 610, handle; 620, top cover support; 621, avoidance hole; 622, third clamping hole; 623, first guide protrusion; 624, second guide protrusion; 630, top cover; 631, third clamping protrusion; 632, fourth clamping protrusion; 633, fifth clamping protrusion;

[0040] 700, bottom cover assembly; 710, running wheel; 711, front wheel; 712, rear wheel; 720, bottom cover; 721, plug-in sleeve;

[0041] 800. Tie rod assembly. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] The utility model discloses an energy storage device, such as Figure 1 and Figure 2 As shown, the energy storage device of this embodiment includes an energy storage module 100, a first connecting plate 200, a second connecting plate 300, a front cover 400 and two side covers 500 (hereinafter referred to as a left cover 510 and a right cover 520 for the convenience of distinction), the energy storage module 100 includes an energy storage shell 110 and a battery module 120, the energy storage shell 110 is installed on one side of the battery module 120 along the first direction, the first connecting plate 200 and the second connecting plate 300 are respectively installed on both sides of the battery module 120 along the second direction, and the front cover 400 is located on the other side of the battery module 120 along the first direction; the left cover 510 and the right cover 520 are respectively located on both sides of the battery module 120 along the third direction; the left cover 510 and the right cover 520 are respectively connected to the second connecting plate 300 and the first connecting plate 200 on both sides along the second direction; and the left cover 510 and the right cover 520 are respectively snap-connected to the energy storage shell 110 and the front cover 400 on both sides along the first direction.

[0047] It can be understood that, in the actual assembly process, the energy storage module 100, the first connecting plate 200 and the second connecting plate 300 are connected as a whole, as the main beam of the whole machine, the left cover 510, the right cover 520 and the front cover 400 are respectively installed on the main beam, because the left cover 510 is snap-connected with the energy storage shell 110 and the front cover 400, and the right cover 520 is snap-connected with the energy storage shell 110 and the front cover 400, that is, the installation process of the energy storage device of this embodiment is similar to the assembly process of building blocks, compared with the structure of placing the battery module into the box in the prior art, the assembly of the energy storage device of this embodiment is very convenient. At the same time, because the first connecting plate 200 and the second connecting plate 300 are respectively installed on both sides of the battery module 120 along the second direction, after the actual assembly is completed, the left cover 510, the right cover 520 and the front cover 400 are not load-bearing structures, and the strength requirements for them can be reduced during the manufacturing process, thereby reducing the manufacturing cost of the energy storage device.

[0048] refer to Figure 2 and Figure 4As shown, the energy storage module 100 also includes an inverter 130, and the outer side of the inverter 130 is surrounded to form a metal shell 131. The inverter 130 is installed on the side of the battery module 120 away from the energy storage shell 110 in the first direction. It can be understood that the additional inverter 130 converts DC power into constant frequency and constant voltage or frequency and voltage modulation AC power (generally 220V, 50Hz sine wave), so as to facilitate the use of the energy storage device. The outer side of the inverter 130 is surrounded to form a metal shell 131, which can protect the inverter 130 and prevent the inverter 130 from being damaged. The inverter 130 is installed on the side of the battery module 120 away from the energy storage shell 110 in the first direction. The inverter 130 and the energy storage shell 110 sandwich the battery module 120 in the middle, which can play a good protective role on the battery module 120, reduce the probability of the battery module 120 being damaged, thereby reducing the failure rate of the energy storage device and extending the service life of the energy storage device.

[0049] Further, the first connecting plate 200 and the second connecting plate 300 are respectively installed on both sides of the battery module 120 and the metal shell 131 along the second direction. It can be understood that the first connecting plate 200 and the second connecting plate 300 are respectively connected to the battery module 120 and the metal shell 131, which is conducive to improving the connection stability of the first connecting plate 200 and the second connecting plate 300, thereby improving the bearing capacity of the first connecting plate 200 and the second connecting plate 300, thereby ensuring the structural strength of the entire energy storage device.

[0050] Optionally, the first connecting plate 200 and the second connecting plate 300 are connected to the battery module 120 respectively through the first fixing member. In this way, the connection stability between the first connecting plate 200 and the second connecting plate 300 and the battery module 120 can be improved, and the installation and removal of the first connecting plate 200 and the second connecting plate 300 and the battery module 120 can be facilitated.

[0051] Further optionally, the first fixing member is any one or more of a screw, a fixing pin or a rivet.

[0052] Optionally, the first connecting plate 200 and the second connecting plate 300 are connected to the metal housing 131 respectively through a second fixing member. Thus, the connection stability between the first connecting plate 200 and the second connecting plate 300 and the metal housing 131 can be improved, and the installation and removal of the first connecting plate 200 and the second connecting plate 300 and the metal housing 131 can be facilitated. Further optionally, the second fixing member is any one or more of a screw, a fixing pin or a rivet.

[0053] refer to Figure 7As shown, the battery module 120 includes a plurality of battery cells 121 and a battery cell holder 122, wherein the battery cell holder 122 is provided with a plurality of first receiving grooves; the energy storage shell 110 is provided with a plurality of second receiving grooves 114, wherein one end of the battery cell 121 is received in the first receiving groove, and the other end of the battery cell 121 is received in the second receiving groove 114, and the battery cell holder 122 is connected to the energy storage shell 110 to fix the battery cell 121. It can be understood that the battery cell holder 122 is connected to the energy storage shell 110 to fix the battery cell 121, and the two ends of the battery cell 121 are respectively matched in the first receiving groove on the battery cell holder 122 and the second receiving groove 114 on the energy storage shell 110, thereby ensuring the installation stability of the battery cell 121, and the battery cell holder 122 and the energy storage shell 110 can play a good protective role on the battery cell 121, reduce the occurrence of damage to the battery cell 121, thereby reducing the failure rate of the energy storage device and extending the service life of the energy storage device.

[0054] refer to Figure 3 and Figure 4 As shown, the first connecting plate 200 is provided with top mounting flanges 210 on both sides along the third direction, and the top ends of the left cover 510 and the right cover 520 along the second direction are provided with first mounting portions 501 corresponding to the top mounting flanges 210, and the top mounting flanges 210 and the first mounting portions 501 are connected via a first connector (not shown). It is understandable that, in the actual installation process, when the first connecting plate 200 and the second connecting plate 300 are fixed to both sides of the battery module 120 along the second direction, the two top mounting flanges 210 of the first connecting plate 200 also stop against the first mounting portion 501 on the left cover 510 and the first mounting portion 501 on the right cover 520, respectively, and then the first connector is used to realize the reinforced fixation of the first connecting plate 200 with the left cover 510 and the right cover 520, thereby facilitating the improvement of the structural reliability of the entire energy storage device.

[0055] Optionally, the first connecting member is any one or more of a screw, a fixing pin or a rivet.

[0056] refer to Figure 3 and Figure 4As shown, the second connecting plate 300 is provided with bottom mounting flanges 310 on both sides along the third direction, and the bottom ends of the two side covers 500 along the second direction are provided with second mounting portions 502 corresponding to the bottom mounting flanges 310, and the bottom mounting flanges 310 are connected to the second mounting portions 502 via a second connector. It is understandable that, in the actual installation process, when the first connecting plate 200 and the second connecting plate 300 are fixed to both sides of the battery module 120 along the second direction, the two bottom mounting flanges 310 of the second connecting plate 300 also stop against the second mounting portion 502 on the left cover 510 and the second mounting portion 502 on the right cover 520, respectively, and then the second connector is used to realize the reinforced fixation of the first connecting plate 200 with the left cover 510 and the right cover 520, thereby facilitating the improvement of the structural reliability of the entire energy storage device.

[0057] Optionally, the second connecting member is any one or more of a screw, a fixing pin or a rivet.

[0058] refer to Figure 4 and Figure 6 As shown, the left cover 510 and the right cover 520 are provided with a first clamping protrusion 503 and a second clamping protrusion 504 on both sides along the first direction; the energy storage shell 110 is provided with a first clamping hole 111 that matches the first clamping protrusion 503 on both sides along the third direction; and the front cover 400 is provided with a second clamping hole 410 that matches the second clamping protrusion 504 on both sides along the third direction. It can be understood that when installing the left cover 510 and the right cover 520, it is only necessary to insert the left cover 510 and the right cover 520 into the energy storage shell 110 along the first direction so that the first clamping protrusion 503 is clamped into the first clamping hole 111, which is very convenient to install and has a good connection strength. When installing the front cover 400, it is only necessary to insert the front cover 400 into the left cover 510 and the right cover 520 along the first direction so that the second clamping hole 410 matches the second clamping protrusion 504, which is very convenient to install and has a good connection strength.

[0059] Optionally, there are multiple first latching protrusions 503 and first latching holes 111, and they are spaced apart along the second direction. The left cover 510 and the right cover 520 are connected to the energy storage shell 110 by the cooperation of multiple first latching protrusions 503 and the first latching holes 111, so as to improve the connection stability between the left cover 510 and the right cover 520 and the energy storage shell 110.

[0060] Optionally, there are multiple second locking protrusions 504 and second locking holes 410, which are spaced apart along the second direction. The left cover 510 and the right cover 520 are connected to the front cover 400 by the cooperation of multiple second locking protrusions 504 and second locking holes 410, so as to improve the connection stability between the left cover 510 and the right cover 520 and the front cover 400.

[0061] refer to Figure 2As shown, the energy storage device also includes a top cover assembly 600 and a bottom cover assembly 700, the top cover assembly 600 is connected to the first connecting plate 200 through a third connecting member (not shown in the figure), and is connected to the left cover 510 and the right cover 520 through a fourth connecting member (not shown in the figure), a handle 610 is installed on the top cover assembly 600, and the bottom cover assembly 700 is connected to the second connecting plate 300 through a fifth connecting member (not shown in the figure), and a walking wheel 710 is installed on the bottom cover assembly 700. It can be understood that the additional top cover assembly 600 and the bottom cover assembly 700 can hide the first connecting plate 200 and the second connecting plate 300, thereby improving the appearance of the entire energy storage device. The handle 610 is installed on the top cover assembly 600, and the walking wheel 710 is installed on the bottom cover assembly 700 to facilitate the handling and transportation of the energy storage device, improve the convenience of use of the energy storage device, and help improve user experience satisfaction. In addition, the top cover assembly 600 is connected to the first connecting plate 200 through the third connecting member, and is connected to the left cover 510 and the right cover 520 through the fourth connecting member, and the bottom cover assembly 700 is connected to the second connecting plate 300 through the fifth connecting member, which can improve the installation stability of the top cover assembly 600 and the bottom cover assembly 700, thereby further improving the structural reliability of the energy storage device.

[0062] Optionally, the third connecting member, the fourth connecting member and the fifth connecting member are any one or more of screws, fixing pins or rivets.

[0063] refer to Figure 2 and Figure 5 As shown, the top cover assembly 600 includes a top cover support 620 and a top cover 630. The top cover support 620 is connected to the first connecting plate 200 through a third connecting member. An avoidance hole 621 is provided on the top cover support 620. The first connecting plate 200 is provided with a protrusion 220 corresponding to the avoidance hole 621. The protrusion 220 passes through the avoidance hole 621 and is connected to the handle 610. The top cover 630 is clamped to the top cover support 620, the front cover 400 and the energy storage shell 110. It is understandable that the first connecting plate 200 is provided with a protrusion 220 corresponding to the avoidance hole 621, and the protrusion 220 passes through the avoidance hole 621 and is connected to the handle 610. When the user holds the handle 610 to carry the energy storage device, since the handle 610 is connected to the first connecting plate 200, and the first connecting plate 200 is connected to the energy storage module 100, it is equivalent to the user directly lifting the energy storage module 100, ensuring the carrying reliability of the entire energy storage device and reducing the probability of the handle 610 breaking. The top cover 630 is snapped to the top cover support 620, the front cover 400 and the energy storage shell 110. During the installation process, the top cover 630 can be directly aligned with the top cover support 620, the front cover 400 and the energy storage shell 110, and it can be snapped in, which is very convenient to install.

[0064] Optionally, a third latching protrusion 631, a fourth latching protrusion 632 and a fifth latching protrusion 633 are provided on the top cover 630, a third latching hole 622 cooperating with the third latching protrusion 631 is provided on the top cover support 620, a fourth latching hole 420 cooperating with the fourth latching protrusion 632 is provided on the front cover 400, and a fifth latching hole 112 cooperating with the fifth latching protrusion 633 is provided on the energy storage shell 110.

[0065] refer to Figure 4 As shown, the bottom cover assembly 700 includes a bottom cover 720, which is mounted on the second connecting plate 300 through a fifth connecting member, and the bottom cover 720 is provided with a plug-in sleeve 721, and the left cover 510 and the right cover 520 are provided with a plug-in column 505 corresponding to the plug-in sleeve 721. It can be understood that in the actual installation process, the bottom cover assembly 700 is aligned with one end of the left cover 510 and the right cover 520 and pushed along the second direction, and the plug-in sleeve 721 on the bottom cover 720 is matched with the plug-in column 505 on the left cover 510 and the right cover 520, and the bottom cover 720 is fixed to the second connecting plate 300 by using the fifth connecting member. The plug-in sleeve 721 and the plug-in column 505 realize the positioning of the bottom cover assembly 700, and the fifth connecting member realizes the fixing of the bottom cover assembly 700, which ensures the installation accuracy and convenience of the bottom cover assembly 700.

[0066] In an alternative embodiment, the bottom cover 720 is provided with a plug-in column 505 , and the left cover 510 and the right cover 520 are provided with a plug-in sleeve 721 corresponding to the plug-in column 505 .

[0067] refer to Figure 5 As shown, the top cover support 620 is provided with a first guide protrusion 623, and the front cover 400 is provided with a first guide groove 430 that cooperates with the first guide protrusion 623; the first guide protrusion 623 and the first guide groove 430 are both arranged along the second direction. It can be understood that when installing the top cover support 620, the top cover support 620 can be pushed along the second direction, and the cooperation between the first guide protrusion 623 and the first guide groove 430 can guide the installation direction of the top cover support 620, thereby avoiding the top cover support 620 from getting stuck during the installation process. In an alternative embodiment of the utility model, the top cover support 620 is provided with a first guide groove 430, and the front cover 400 is provided with a first guide protrusion 623 that cooperates with the first guide groove 430.

[0068] refer to Figure 5As shown, the top cover support 620 is provided with a second guide protrusion 624, and the energy storage shell 110 is provided with a second guide groove 113 that cooperates with the second guide protrusion 624; the second guide protrusion 624 and the second guide groove 113 are both arranged along the second direction. It can be understood that when installing the top cover support 620, the top cover support 620 can be pushed along the second direction, and the cooperation of the second guide protrusion 624 and the second guide groove 113 can guide the installation direction of the top cover support 620, thereby avoiding the top cover support 620 from getting stuck during the installation process. In an alternative embodiment of the utility model, the top cover support 620 is provided with a second guide groove 113, and the energy storage shell 110 is provided with a second guide protrusion 624 that cooperates with the second guide groove 113.

[0069] It should be noted that the transverse cross-section of the top cover support member 620 is substantially rectangular, and two sides of the rectangle extend in the first direction and the second direction, respectively. In this embodiment, two first guide protrusions 623 and two second guide protrusions 624 are respectively provided on the top cover support member 620, and the two first guide protrusions 623 and the two second guide protrusions 624 are respectively located at the corners of the top cover support member 620.

[0070] refer to Figure 2 As shown, the walking wheel 710 includes two front wheels 711 and two rear wheels 712, and the diameter of the rear wheel 712 is larger than the diameter of the front wheel 711; the two front wheels 711 are located below the front cover 400, and the two rear wheels 712 are located below the energy storage shell 110; the energy storage device also includes a tie rod assembly 800, and the tie rod assembly 800 is installed on the side of the energy storage shell 110 away from the energy storage module 100, and the tie rod assembly 800 has a retractable tie rod. It is understandable that during the transportation process, the user can lengthen the tie rod of the tie rod assembly 800 and tilt the entire energy storage device so that the two rear wheels 712 are on the ground and the two front wheels 711 are tilted, so that the entire energy storage device can be pulled very conveniently, which is conducive to improving user satisfaction.

[0071] refer to Figure 3 As shown, the first connecting plate 200 is provided with a fixed edge 230 extending along the third direction, and the fixed edge 230 is connected to the energy storage shell 110 through a sixth connecting member (not shown). This can strengthen the connection strength between the first connecting plate 200 and the energy storage module 100, thereby facilitating the improvement of the structural strength of the entire energy storage device.

[0072] Optionally, the second connecting plate 300 is connected to the energy storage shell 110 via a seventh connecting member (not shown), thereby strengthening the connection strength between the second connecting plate 300 and the energy storage module 100, thereby facilitating the improvement of the structural strength of the entire energy storage device.

[0073] Optionally, the sixth connecting member and the seventh connecting member are any one or more of screws, fixing pins or rivets.

[0074] The advantages of the energy storage device of this embodiment are as follows:

[0075] First, the energy storage module 100 serves as an internal support frame, which is connected as a whole by the first connecting plate 200 and the second connecting plate 300, and serves as the main beam of the whole machine. Since the energy storage module 100 accounts for two-thirds of the weight of the whole machine and is located in the center of the whole machine, the center of gravity of the whole machine is concentrated, the balance is good, and the strength and stability are very reliable.

[0076] Second: the whole machine does not need to be moved during assembly. The left cover 510, the right cover 520, the first connecting plate 200, the second connecting plate 300, the bottom cover assembly 700, the front cover 400, and the top cover assembly 600 are assembled in sequence. The assembly is very simple, saving time and effort.

[0077] Third: Because the appearance structural parts (left cover 510, right cover 520, front cover 400, bottom cover 720) do not bear gravity, the conventional left and right structures and deep cavity and deep frame positions are changed to a spliced ​​structure. The cavity depth and frame position of a single part are small, the structure is simple, and the mold processing efficiency is greatly improved. The injection molding machine used in production has a small tonnage and a short injection molding time, thereby reducing the manufacturing time and manufacturing cost of the entire machine.

[0078] The assembly process of the energy storage device of this embodiment is as follows:

[0079] Step 1: Fix the rod assembly 800 to the energy storage shell 110 of the energy storage module 100 by connecting screws, and then place the energy storage module 100 flat on a work surface (such as Figure 7 shown);

[0080] Step 2: Align the left cover 510 and the right cover 520 to the two sides of the energy storage shell 110 along the third direction, and insert the multiple first latching protrusions 503 on the left cover 510 and the right cover 520 into the multiple first latching holes 111 on the energy storage shell 110 in a one-to-one correspondence (such as Figure 8 shown);

[0081] Step 3: The first connecting plate 200 and the second connecting plate 300 are respectively connected to the two sides of the battery holder 122 along the second direction by using the first fixing member, and are connected to the two sides of the metal shell 131 along the second direction by using the second fixing member, and the top mounting flanges 210 provided on the two sides of the first connecting plate 200 along the third direction are respectively fixed to the first mounting parts 501 on the left cover 510 and the right cover 520 by using the first connecting member (connecting screw), and the top mounting flanges 210 provided on the two sides of the second connecting plate 300 along the third direction are respectively fixed to the second mounting parts 502 on the left cover 510 and the right cover 520 by using the second connecting member (connecting screw), and the fixing edge 230 on the first connecting plate 200 is fixed to the energy storage shell 110 by using the sixth connecting member, and the first connecting plate 200 is connected to the energy storage shell 110 by using the seventh connecting member (such as Fig. 9 shown);

[0082] Step 4: Align the bottom cover assembly 700 with one end of the left cover 510 and the right cover 520 and push it along the second direction, so that the plug sleeve 721 on the bottom cover 720 is matched with the plug post 505 on the left cover 510 and the right cover 520, and the bottom cover 720 is fixed to the second connecting plate 300 (such as Fig.10 shown);

[0083] Step 5: Align the top cover support 620 with the left cover 510 and the right cover 520 and push it along the other end of the second direction, so that the first guide protrusion 623 on the top cover support 620 is inserted into the first guide groove 430 of the front cover 400, and the second guide protrusion 624 is inserted into the second guide groove 113 of the energy storage shell 110, and the protrusion 220 on the first connecting plate 200 passes through the avoidance hole 621 on the top cover support 620, and then fix the handle 610 to the protrusion 220 and the top cover support 620 by screws (such as Fig.11 shown);

[0084] Step 6: Align the top cover 630 with the top cover support 620 and push it forward so that the third latching protrusion 631, the fourth latching protrusion 632 and the fifth latching protrusion 633 on the top cover 630 are respectively inserted into the third latching hole 622 on the top cover support 620, the fourth latching hole 420 of the front cover 400 and the fifth latching hole 112 on the energy storage shell 110 (as shown in FIG. Fig.12 shown).

[0085] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An energy storage device, characterized in that: include: An energy storage module, the energy storage module comprising an energy storage shell and a battery module, the energy storage shell being mounted on one side of the battery module along a first direction; A first connecting plate and a second connecting plate, wherein the first connecting plate and the second connecting plate are respectively mounted on two sides of the battery module along a second direction; A front cover, the front cover is located at the other side of the battery module along the first direction; Two side covers, the two side covers are respectively located on both sides of the battery module along the third direction; the two sides of each side cover along the second direction are respectively connected to the first connecting plate and the second connecting plate; and the two sides of each side cover along the first direction are respectively connected to the energy storage shell and the front cover by snap-fitting.

2. The energy storage device according to claim 1, characterized in that: The energy storage module further includes an inverter, the outer side of the inverter is surrounded by a metal shell, and the inverter is installed on a side of the battery module away from the energy storage shell in the first direction.

3. The energy storage device according to claim 2, characterized in that: The first connecting plate and the second connecting plate are respectively installed on both sides of the battery module and the metal shell along the second direction.

4. The energy storage device according to claim 1, characterized in that: The battery module includes: a plurality of battery cells and a battery cell bracket, The battery cell support is provided with a plurality of first accommodating grooves; The energy storage shell is provided with a plurality of second accommodating grooves, one end of the battery cell is accommodated in the first accommodating groove, the other end of the battery cell is accommodated in the second accommodating groove, and the battery cell bracket is connected to the energy storage shell to fix the battery cell.

5. The energy storage device according to claim 1, characterized in that: The first connecting plate is provided with top mounting flanges on both sides along the third direction, and the top ends of the two side covers along the second direction are provided with first mounting portions corresponding to the top mounting flanges, and the top mounting flanges are connected to the first mounting portions via a first connecting member.

6. The energy storage device according to claim 1, characterized in that: The second connecting plate is provided with bottom mounting flanges on both sides along the third direction, and the bottom ends of the two side covers along the second direction are provided with second mounting parts corresponding to the bottom mounting flanges, and the bottom mounting flanges are connected to the second mounting parts through a second connecting member.

7. The energy storage device according to claim 1, characterized in that: Each of the side covers is provided with a first clamping protrusion and a second clamping protrusion on both sides along the first direction; The energy storage shell is provided with first clamping holes matched with the first clamping protrusions on both sides along the third direction; the front cover is provided with second clamping holes matched with the second clamping protrusions on both sides along the third direction.

8. The energy storage device according to any one of claims 1 to 7, characterized in that: The energy storage device also includes: A top cover assembly, the top cover assembly is connected to the first connecting plate through a third connecting member, and is connected to the two side covers through a fourth connecting member, and a handle is installed on the top cover assembly; A bottom cover assembly is connected to the second connecting plate via a fifth connecting member, and walking wheels are installed on the bottom cover assembly.

9. The energy storage device according to claim 8, characterized in that: The top cover assembly comprises: A top cover support, wherein the top cover support is connected to the first connecting plate through the third connecting member, the top cover support is provided with an avoidance hole, the first connecting plate is provided with a protrusion corresponding to the avoidance hole, and the protrusion passes through the avoidance hole and is connected to the handle; A top cover is clamped on the top cover support, the front cover and the energy storage shell.

10. The energy storage device according to claim 8, characterized in that: The bottom cover assembly includes a bottom cover, which is installed on the second connecting plate through the fifth connecting piece. A plug-in sleeve is provided on one of the bottom cover and the side cover, and a plug-in column corresponding to the plug-in sleeve is provided on the other of the bottom cover and the side cover.

11. The energy storage device according to claim 8, characterized in that: One of the top cover assembly and the front cover is provided with a first guide protrusion, and the other of the top cover assembly and the front cover is provided with a first guide groove matched with the first guide protrusion; the first guide protrusion and the first guide groove are both arranged along the second direction; and / or: One of the top cover assembly and the energy storage shell is provided with a second guide protrusion, and the other of the top cover assembly and the energy storage shell is provided with a second guide groove matching with the second guide protrusion; the second guide protrusion and the second guide groove are both arranged along the second direction.

12. The energy storage device according to claim 8, characterized in that: The walking wheels include two front wheels and two rear wheels, and the diameter of the rear wheels is larger than that of the front wheels; the two front wheels are located below the front cover, and the two rear wheels are located below the energy storage shell; The energy storage device further comprises a pull rod assembly, which is installed on a side of the energy storage shell away from the energy storage module, and the pull rod assembly comprises a retractable pull rod.

13. The energy storage device according to any one of claims 1 to 7, characterized in that: The first connecting plate is provided with a fixed edge extending along the third direction, the fixed edge is connected to the energy storage shell via a sixth connecting member, and the second connecting plate is connected to the energy storage shell via a seventh connecting member.

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