Shell assembly and energy storage device

Abstract

The utility model discloses a shell assembly and an energy storage device. The shell assembly is used for the energy storage device. A containing cavity is formed in the energy storage device, and a connecting hole communicated with the containing cavity is formed in the shell assembly. The connecting hole comprises a first hole opening facing the containing cavity and a second hole opening deviating from the containing cavity. Wherein the projection plane is perpendicular to the orifice axis of the first orifice, the first orifice forms a first orthographic projection on the projection plane, the second orifice forms a second orthographic projection on the projection plane, and at least part of the first orthographic projection is located on the upper side of the second orthographic projection. According to the scheme, the arrangement position of the first hole is higher than that of the second hole, so that external rainwater can be effectively prevented from entering the first hole at the high position from the second hole at the low position through the connecting hole, the rainwater can be prevented from entering the containing cavity, the sealing performance of the shell assembly is effectively improved, and short circuit of the energy storage device and corrosion of internal devices by the rainwater are prevented; and continuous normal operation of the energy storage device is ensured.

Description

Technical Field

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

[0002] Energy storage containers are used to store electrical energy for release when needed. They are used in balancing renewable energy generation (such as solar and wind power), energy scheduling, and emergency power backup. The container contains a chamber containing battery modules. External cables or wires must be inserted into the chamber to connect the battery modules.

[0003] In related art, the energy storage box body has a connection hole that connects to the storage cavity. Cables can pass through the connection hole and enter the storage cavity. Sealing material is used to seal the gap between the cables and the connection hole to ensure that the energy storage box has a protection level of at least IP54. However, when multiple cables pass through the connection hole, external rainwater may flow into the storage cavity along the gaps between the cables and the sealing material, and between the connection hole and the sealing material. This can cause the energy storage box to short-circuit or cause rainwater to corrode internal components, affecting the normal operation and service life of the energy storage box. In other words, the sealing performance of existing energy storage boxes is poor. Utility Model Content

[0004] The main purpose of the utility model is to provide a shell assembly and an energy storage device, aiming to solve the technical problem of poor sealing performance of the energy storage box.

[0005] To achieve the above-mentioned objectives, an embodiment of the first aspect of the present invention proposes a shell assembly for an energy storage device, wherein the energy storage device has a cavity therein, and the shell assembly is provided with a connecting hole connected to the cavity, and the connecting hole includes a first opening facing the cavity and a second opening away from the cavity; wherein, the projection plane is perpendicular to the opening axis of the first opening, the first opening forms a first orthographic projection on the projection plane, and the second opening forms a second orthographic projection on the projection plane, and the first orthographic projection is at least partially located on the upper side of the second orthographic projection.

[0006] In some embodiments, the first orthographic projection includes a first bottom endpoint at its bottom, the first bottom endpoint has a first height H1, and the second orthographic projection includes a second bottom endpoint at its bottom, the second bottom endpoint has a second height H2, wherein 10mm≤H1-H2≤50mm.

[0007] In some embodiments, the connecting hole includes a hole axis passing through the first orifice and the second orifice, the hole axis is a straight line, the horizontal plane is perpendicular to the projection plane, and the angle between the hole axis and the horizontal plane is α, wherein α satisfies: 10°≤α≤45°.

[0008] In some embodiments, the connecting hole includes a first hole segment and a second hole segment that are arranged opposite to each other, the first hole segment includes the first orifice, and the second hole segment includes the second orifice;

[0009] The first hole section has a first hole axis passing through the first hole, and the second hole section has a second hole axis passing through the second hole. The first hole axis and the second hole axis are both straight lines and perpendicular to the projection plane, and the first orthographic projection and the second orthographic projection partially overlap or are spaced apart.

[0010] In some embodiments, the connecting hole includes a third hole section located between the first hole section and the second hole section, the third hole section has a third orifice and a third orifice axis passing through the third orifice, the third orifice axis is a straight line and perpendicular to the projection plane, the third orifice forms a third orthographic projection on the projection plane, and the third orthographic projection partially overlaps with the first orthographic projection and the second orthographic projection.

[0011] In some embodiments, the connecting hole includes a first hole segment and a second hole segment that are oppositely arranged, the first hole segment includes the first orifice, and the second hole segment includes the second orifice; and

[0012] The first bore section has a first bore axis passing through the first bore, the first bore axis being a curve, and / or the second bore section has a second bore axis passing through the second bore, the second bore axis being a curve.

[0013] In some embodiments, the connecting hole includes a third hole segment located between the first hole segment and the second hole segment, the third hole segment has a third orifice and a third orifice axis passing through the third orifice, and the third orifice axis is a curve.

[0014] In some embodiments, the projection area of ​​the first orthographic projection is larger than the projection area of ​​the second orthographic projection, or the projection area of ​​the first orthographic projection is equal to the projection area of ​​the second orthographic projection.

[0015] The second embodiment of the present invention provides an energy storage device, comprising:

[0016] The housing assembly as described in the above embodiment;

[0017] A battery module is arranged in the cavity.

[0018] In some embodiments, the energy storage device includes a wire, which passes through the connection hole and is electrically connected to the battery module.

[0019] In some embodiments, the energy storage device further includes a sealing portion, which is at least partially disposed in the connecting hole and connects an inner wall of the connecting hole and the wire.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In the technical solution of the present invention, a housing assembly is used for an energy storage device. The energy storage device has a cavity within it, and the housing assembly is provided with a connection hole communicating with the cavity. In the prior art, when multiple cables are routed through the connection hole, external rainwater may flow into the cavity along the gaps between the cables and the sealing material, and between the connection hole and the sealing material, causing the energy storage box to short-circuit or corrode internal components, thereby affecting the normal operation and service life of the energy storage box. The connection hole of this solution includes a first opening facing the cavity and a second opening facing away from the cavity. The projection plane is perpendicular to the aperture axis of the first opening, and the first opening forms a first orthographic projection on the projection plane, while the second opening forms a second orthographic projection on the projection plane, with the first orthographic projection at least partially located above the second orthographic projection. In other words, the first opening of this solution is positioned higher than the second opening. Therefore, this solution effectively prevents external rainwater from entering the higher-positioned first opening through the connection hole from the lower-positioned second opening, thereby preventing rainwater from flowing into the cavity. This effectively improves the sealing performance of the housing assembly, prevents short-circuiting of the energy storage device and corrosion of internal components, and ensures the continued normal operation of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram of a housing assembly in one embodiment of the present invention; wherein the aperture axis of the first aperture is parallel to the left-right direction, and the first orthographic projection and the second orthographic projection partially overlap;

[0024] Figure 2 This is a schematic structural diagram of an energy storage device in one embodiment of the present invention, wherein the housing assembly and the connection hole are shown;

[0025] Figure 3 This is a schematic diagram of an explosion of an energy storage device in one embodiment of the present utility model;

[0026] Figure 4 for Figure 3 A partial enlarged view of point A in the middle, showing the housing assembly, the wire tube and the wires;

[0027] Figure 5 This is a side view of an energy storage device in one embodiment of the present utility model;

[0028] Figure 6 A partial cross-sectional schematic diagram of an energy storage device in one embodiment of the present utility model;

[0029] Figure 7 for Figure 6 A partial enlarged view of point C in the middle, showing the first orifice and the second orifice;

[0030] Figure 8 1 is a partial schematic diagram of a housing assembly in one embodiment of the present invention; wherein the first opening is located above the second opening, and the first orthographic projection is spaced apart from the second orthographic projection;

[0031] Figure 9 1 is a partial schematic diagram of a housing assembly in one embodiment of the present invention; wherein the first opening is located above the second opening, and the first orthographic projection partially overlaps with the second orthographic projection;

[0032] Figure 10 It is a partial schematic diagram of a shell assembly in one embodiment of the present invention, wherein the first hole segment, the second hole segment and the third hole segment are shown.

[0033] Description of Figure Numbers:

[0034] Energy storage device 1;

[0035] Housing assembly 10;

[0036] Connecting hole 100;

[0037] First orifice 110; orifice axis 111;

[0038] a second orifice 120;

[0039] Projection plane 130; first orthographic projection 131; first bottom endpoint 1311; second orthographic projection 132;

[0040] second bottom endpoint 1321;

[0041] Hole axis 140;

[0042] First hole section 150; first hole axis 151;

[0043] Second hole section 160; second hole axis 161;

[0044] Third hole section 170; third orifice 171; third orifice axis 1711;

[0045] Threading tube 180;

[0046] horizontal plane 190;

[0047] Cavity 20;

[0048] Wire 30.

[0049] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] Energy storage containers are used to store electrical energy for release when needed. They are used in balancing renewable energy generation (such as solar and wind power), energy scheduling, and emergency power backup. The container contains a chamber containing battery modules. External cables or wires must be inserted into the chamber to connect the battery modules.

[0052] In related art, the energy storage box body has a connection hole that connects to the storage cavity. Cables can pass through the connection hole and enter the storage cavity. Sealing material is used to seal the gap between the cables and the connection hole to ensure that the energy storage box has a protection level of at least IP54. However, when multiple cables pass through the connection hole, external rainwater may flow into the storage cavity along the gaps between the cables and the sealing material, and between the connection hole and the sealing material. This can cause the energy storage box to short-circuit or cause rainwater to corrode internal components, affecting the normal operation and service life of the energy storage box. In other words, the sealing performance of existing energy storage boxes is poor.

[0053] In view of this, the first embodiment of the present invention proposes a shell assembly 10 that can ensure the sealing performance of the energy storage device 1. It can be understood that the shell assembly 10 is used for the energy storage device 1, and the energy storage device 1 can be an energy storage box or an energy storage cabin, etc. The embodiment of the present application takes the energy storage device 1 as an energy storage box as an example for explanation. It should be noted that the energy storage device 1 has a cavity 20 inside, and the cavity 20 can accommodate a battery module, etc. Figures 1 to 10 The housing assembly 10 according to an embodiment of the present application will be introduced.

[0054] Reference Figures 2 to 6The shell assembly 10 can define at least part of the cavity 20. The specific structure and size of the shell assembly 10 can be determined according to actual conditions. The embodiment of the present application is described by taking the shell assembly 10 as a cube. The shell assembly 10 is provided with a connection hole 100, and the connection hole 100 can be connected to the cavity 20. It can be understood that the wire 30 or cable can pass through the connection hole 100 to enter the cavity 20 and then electrically connect the battery module. It should be noted that in some embodiments, the shell assembly 10 itself can be provided with a connection hole 100. In other embodiments, the energy storage device 1 has a threading tube 180, and the threading tube 180 can be arranged through the shell assembly 10, and the threading tube 180 has a connection hole 100. The specific structure and size can be determined according to actual conditions. The embodiment of the present application is described by taking the threading tube 180 as an example. The threading tube 180 of this solution is convenient for separate processing and can ensure the threading and installation efficiency of the wire 30. It should be noted that the threading tube 180 can be welded to the shell assembly 10.

[0055] Reference Figure 1 and Figure 7 The connecting hole 100 includes a first opening 110 and a second opening 120 arranged opposite to each other. The first opening 110 is the opening of the connecting hole 100 facing the cavity 20, and the second opening 120 is the opening of the connecting hole 100 facing away from the cavity 20. Figure 7 The first opening 110 is the opening at the left end of the connecting hole 100, and the second opening 120 is the opening at the right end of the connecting hole 100. It should be noted that the shape of the first opening 110 can be circular, square, or triangular, etc. It is understood that the shape of the second opening 120 can be the same as or different from that of the first opening 110. The present embodiment of the application is described using the example where both the first opening 110 and the second opening 120 are circular.

[0056] Reference Figure 1 , the relative arrangement positions of the first orifice 110 and the second orifice 120 are described below. For ease of description and understanding, a projection plane 130 is defined. The projection plane 130 is perpendicular to the orifice axis 111 of the first orifice 110. Figure 1 In terms of orientation, the aperture axis 111 of the first aperture 110 points in the left-right direction, and the projection plane 130 is a vertical plane perpendicular to the left-right direction. The first aperture 110 forms a first orthographic projection 131 on the projection plane 130, which is a closed geometric figure. The second aperture 120 forms a second orthographic projection 132 on the projection plane 130, which is also a closed geometric figure. Vertically, the first orthographic projection 131 is at least partially located above the second orthographic projection 132, meaning that the first aperture 110 is positioned higher than the second aperture 120.

[0057] Need explanation, refer to Figure 1The relative heights of the first orthographic projection 131 and the second orthographic projection 132 are compared using their respective base endpoints as a reference, i.e., comparing the first base endpoint 1311 of the first orifice 110 with the second base endpoint 1321 of the second orifice 120. The relative positions of the top points of the first orthographic projection 131 and the second orthographic projection 132 can be determined based on actual circumstances. Specifically, in some embodiments, the top point of the first orthographic projection 131 can be higher than the top point of the second orthographic projection 132, i.e., the top point of the first orthographic projection 131 can be higher than the top point of the second orthographic projection 132. In other embodiments, the top point of the first orthographic projection 131 can be flush with the top point of the second orthographic projection 132, i.e., the top point of the first orthographic projection 110 can be flush with the top point of the second orthographic projection 120. In other embodiments, the top point of the first orthographic projection 131 can be lower than the top point of the second orthographic projection 132. The present embodiment is described using the example where the top point of the first orthographic projection 131 is higher than the top point of the second orthographic projection 132.

[0058] In the technical solution of the present invention, a shell assembly 10 is used for an energy storage device 1. The energy storage device 1 has a cavity 20, and the shell assembly 10 is provided with a connection hole 100 connected to the cavity 20. In the prior art, when multiple cables are passed through the connection holes, external rainwater may flow into the cavity along the gaps between the cables and the sealing material, and between the connection holes and the sealing material, causing the energy storage box to short-circuit or rainwater to corrode internal components, affecting the normal operation and service life of the energy storage box. The connection hole 100 of this solution includes a first orifice 110 facing the cavity 20 and a second orifice 120 facing away from the cavity 20. The projection plane 130 is perpendicular to the orifice axis of the first orifice 110. The first orifice 110 forms a first orthographic projection 131 on the projection plane 130, and the second orifice 120 forms a second orthographic projection 132 on the projection plane 130. The first orthographic projection 131 is at least partially located above the second orthographic projection 132. In other words, the first orifice 110 of the present embodiment is arranged at a higher position than the second orifice 120. Therefore, the present embodiment can effectively inhibit external rainwater from entering the higher-positioned first orifice 110 through the connecting hole 100 from the lower-positioned second orifice 120, thereby preventing rainwater from entering the cavity 20, effectively improving the sealing performance of the shell assembly 10, preventing the energy storage device 1 from short-circuiting and rainwater from corroding internal components, and ensuring that the energy storage device 1 can continue to operate normally.

[0059] Reference Figure 1, the specific height difference setting between the first orifice 110 and the second orifice 120 is introduced below. In some embodiments, the first orthographic projection 131 has a first bottom endpoint 1311 located at the bottom thereof, and the first bottom endpoint 1311 has a first height H1. The second orthographic projection 132 has a second bottom endpoint 1321 located at the bottom thereof, and the second bottom endpoint 1321 has a second height H2. It should be noted that the height of the first bottom endpoint 1311 and the height of the second bottom endpoint 1321 can be based on the horizontal bottom surface of the shell assembly 10 as a reference. Among them, 10mm≤H1-H2≤50mm. Exemplarily, the height difference between the first orthographic projection 131 and the second orthographic projection 132 can be 10mm, 18mm, 25mm, 28mm, 31mm, 34mm, 49mm or 50mm, etc. If the height difference between the first opening 110 and the second opening 120 is too small, there is still a certain possibility that rainwater will splash into the cavity 20 through the gap at the connection hole 100, causing water ingress. If the height difference between the first opening 110 and the second opening 120 is too large, it will be difficult to install the wire 30 in the connection hole 100. The connection hole 100 of this embodiment adopts the above-mentioned configuration, which can effectively prevent water from flowing back into the cavity 20 and facilitate the installation of the wire 30.

[0060] Reference Figure 1 and Figure 7 , the specific tilt setting of the connecting hole 100 is introduced below. In some embodiments, the connecting hole 100 has a hole axis 140, and the hole axis 140 can pass through the first orifice 110 and the second orifice 120. It should be noted that the hole axis 140 can be a straight line. In order to facilitate the description and understanding of the tilt direction of the connecting hole 100, a horizontal plane 190 is defined, and the tilt setting of the hole axis 140 relative to the horizontal plane 190 is used as the definition of the tilt angle of the connecting hole 100. Specifically, the horizontal plane 190 is perpendicular to the projection plane 130, with reference to Figure 7 Axis, the horizontal plane 190 extends along the left and right direction and the front and back direction, and Figure 7 The middle horizontal plane 190 is linear. The angle formed by the hole axis 140 and the horizontal plane 190 is α, wherein α satisfies: 10°≤α≤45°. For example, α can be 10°, 12°, 15°, 23°, 24°, 27°, 30°, 36°, 38° or 45°, etc. When the inclination angle of the connecting hole 100 is too small, that is, rainwater still has a certain possibility of splashing into the cavity 20 through the gap at the connecting hole 100, causing water ingress; when the inclination angle of the connecting hole 100 is too large, the threading and installation operation of the wire 30 in the connecting hole 100 is inconvenient. The connecting hole 100 of this scheme adopts the above-mentioned setting, which can effectively prevent the water from flowing back into the cavity 20, and the threading and installation operation of the wire 30 is convenient and quick.

[0061] Reference Figure 7 and Figure 8, the specific structural arrangement of the connecting hole 100 is described below. In some embodiments, the connecting hole 100 includes a first hole section 150 and a second hole section 160 arranged opposite to each other. It is understood that the first hole section 150 can be connected to the second hole section 160 or can be separated from the second hole section 160. The first hole section 150 includes a first orifice 110, and the second hole section 160 includes a second orifice 120. Figure 8 Regarding orientation, the embodiment of the present application is described by taking the left hole section as the first hole section 150 and the right hole section as the second hole section 160 as an example.

[0062] Reference Figure 8 The first hole section 150 has a first hole axis 151, and the first hole axis 151 can be arranged through the first hole 110. The second hole section 160 has a second hole axis 161, and the second hole axis 161 can be arranged through the second hole 120. Among them, the first hole axis 151 and the second hole axis 161 are both straight lines, that is, the first hole section 150 and the second hole section 160 can both be straight hole sections. In addition, the first hole axis 151 and the second hole axis 161 are both perpendicular to the projection plane 130, that is, the extension direction of the first hole section 150 and the extension direction of the second hole section 160 are both perpendicular to the projection plane 130, that is, the first hole section 150 and the second hole section 160 can together form a first-level stepped hole. The first hole section 150 and the second hole section 160 of this solution are easy to process, and can effectively prevent external rainwater from flowing from the second hole section 160 to the first hole section 150 and then entering the cavity 20 to cause water ingress, thereby improving the sealing performance of the shell assembly 10.

[0063] Need explanation, refer to Figure 9 In some embodiments, the first orthographic projection 131 may partially overlap with the second orthographic projection 132. In other embodiments, referring to Figure 8 , the first orthographic projection 131 may be spaced apart from the second orthographic projection 132. The embodiment of the present application is described by taking the partial overlap of the first orthographic projection 131 and the second orthographic projection 132 as an example.

[0064] Reference Figure 10The specific structural arrangement of the connecting hole 100 is described below. In some embodiments, the connecting hole 100 has a third hole section 170, which is located between the first hole section 150 and the second hole section 160. The third hole section 170 has a third opening 171. It is understood that the third opening 171 can be the opening of the third hole section 170 facing the first hole section 150 or the opening of the third hole section 170 facing the second hole section 160, depending on the actual situation. The third hole section 170 has a third opening axis 1711, which can be arranged to extend through the third hole section 171. The third opening axis 1711 can be a straight line, meaning that the third hole section 170 can be a straight hole section. Furthermore, the third opening axis 1711 is perpendicular to the projection plane 130, meaning that the extension direction of the third hole section 170 is perpendicular to the projection plane 130. This means that the third hole section 170, the first hole section 150, and the second hole section 160 can collectively form a secondary stepped hole. The first hole section 150 , the second hole section 160 and the third hole section 170 of this solution can further prevent external rainwater from entering the cavity 20 through the second hole section 160 , the third hole section 170 and the first hole section 150 , thereby improving the sealing performance of the shell assembly 10 .

[0065] It should be noted that third orifice 171 forms a third orthographic projection on projection plane 130. In some embodiments, the third orthographic projection partially overlaps with both first orthographic projection 131 and second orthographic projection 132. In other embodiments, the third orthographic projection may be spaced apart from second orthographic projection 132, and the second orthographic projection 132 may be spaced apart from first orthographic projection 131, depending on the actual situation.

[0066] The specific structural arrangement of the connecting hole 100 is described below. In some embodiments, the connecting hole 100 includes a first hole section 150. The first hole section 150 has a first orifice 110, and the first hole section 150 has a first orifice axis 151. The first orifice axis 151 can be arranged through the first orifice 110. Specifically, the first orifice axis 151 can be a curve, that is, the first hole section 150 can be a curved hole section. In other embodiments, the connecting hole 100 includes a second hole section 160 arranged opposite the first hole section 150, the second hole section 160 has a second orifice 120, and the second hole section 160 has a second orifice axis 161. The second orifice axis 161 can be arranged through the second orifice 120. Specifically, the second orifice axis 161 can be a curve, that is, the second hole section 160 can be a curved hole section. The connection hole 100 of this solution is a curved hole segment, which can further reduce the risk of rainwater splashing into the connection hole 100 from the second hole 120 and entering the cavity 20, thereby ensuring the sealing performance of the shell assembly 10.

[0067] It should be noted that in some embodiments, the first hole segment 150 of the connecting hole 100 may be a straight hole segment, and the second hole segment 160 may be a curved hole segment. In other embodiments, the first hole segment 150 of the connecting hole 100 may be a curved hole segment, and the second hole segment 160 may be a straight hole segment. In other embodiments, part of the first hole segment 150 may be a straight hole segment and another part may be a curved hole segment, while part of the second hole segment 160 may be a straight hole segment and another part may be a curved hole segment. The specific structural configuration of the connecting hole 100 may depend on actual conditions.

[0068] In some embodiments, the connecting hole 100 includes a third hole section 170, and the third hole section 170 is located between the first hole section 150 and the second hole section 160. The third hole section 170 has a third orifice 171. It can be understood that the third orifice 171 can be the orifice of the third hole section 170 facing the first hole section 150, or it can be the orifice of the third hole section 170 facing the second hole section 160, which can be determined according to the actual situation. The third hole section 170 has a third orifice axis 1711, and the third orifice axis 1711 can be arranged through the third orifice 171. The third orifice axis 1711 can be a curve, that is, the third hole section 170 can be a curved hole section. The connecting hole 100 of this solution is a curved hole section, that is, it can further reduce the risk of rainwater splashing into the connecting hole 100 from the second orifice 120 and entering the cavity 20, thereby ensuring the sealing performance of the shell assembly 10.

[0069] The following describes the relative sizes of the first opening 110 and the second opening 120. In some embodiments, the projected area of ​​the first orthographic projection 131 is larger than the projected area of ​​the second orthographic projection 132, meaning that the opening size of the first opening 110 can be larger than the opening size of the second opening 120. After the multiple wires 30 of this embodiment pass through the connection hole 100, the larger size of the first opening 110 facilitates multi-directional electrical connection of each wire 30 to battery modules or electrical components at different locations, preventing leakage caused by excessive bending of the wires 30 and effectively reducing the occurrence of knots and entanglements among the wires 30. The smaller size of the second opening 120 effectively reduces the probability of rainwater flowing into the connection hole 100 through the second opening 120 and causing water ingress into the cavity 20, thereby ensuring the sealing performance of the housing assembly 10. In other embodiments, the projected area of ​​the first orthographic projection 131 can be equal to the projected area of ​​the second orthographic projection 132, meaning that the opening size of the first opening 110 can be equal to the opening size of the second opening 120. The specific arrangement of the connecting hole 100 may depend on actual conditions.

[0070] The second embodiment of the present invention proposes an energy storage device 1, which includes the shell assembly 10 of the above embodiment, and the energy storage device 1 also includes a battery module. It can be understood that the battery module is arranged in the cavity 20. The first orifice 110 of this solution is arranged at a position higher than the second orifice 120. Therefore, this solution can effectively inhibit external rainwater from entering the first orifice 110 at a higher position through the connecting hole 100 from the second orifice 120 at a lower position, thereby preventing rainwater from entering the cavity 20, effectively improving the sealing performance of the energy storage device 1, preventing the energy storage device 1 from short-circuiting and rainwater from corroding internal components, etc., and ensuring that the energy storage device 1 can continue to operate normally.

[0071] Reference Figure 4 In some embodiments, the energy storage device 1 includes a wire 30, which can pass through the connecting hole 100 and electrically connect the battery module. It can be understood that the energy storage device 1 can be provided with multiple wires 30 to adapt to various conductive requirements. In other embodiments, the energy storage device 1 includes a liquid cooling tube, which can pass through the connecting hole 100. The liquid cooling tube can transmit liquid to achieve heat dissipation and cooling of the battery module in the cavity 20, and by making the first orifice 110 of the connecting hole 100 higher than the second orifice 120, it is possible to prevent rainwater from flowing into the cavity 20 along the gap between the liquid cooling tube and the connecting hole 100 and causing water ingress, thereby ensuring the sealing of the energy storage device 1. The embodiment of the present application is described by taking the example of the wire 30 passing through the connecting hole 100.

[0072] In some embodiments, the energy storage device 1 includes a sealing portion. The sealing portion may be at least partially disposed within the connection hole 100. The specific placement of the sealing portion within the connection hole 100 may depend on the actual situation. Furthermore, the sealing portion may connect the wire 30 to the inner wall of the connection hole 100. Specifically, the sealing portion may be a sealant, etc. The addition of the sealing portion in this solution further enhances the sealing performance of the energy storage device 1, preventing short circuits in the energy storage device 1 and rainwater corrosion of internal components, thereby ensuring the continued normal operation of the energy storage device 1.

[0073] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly. When a directional reference is introduced in a specific embodiment, if the direction is not specifically limited to unidirectional, the direction can be unidirectional or bidirectional (two directions parallel to each other and opposite to each other). Whether it is unidirectional or bidirectional is based on what a person of ordinary skill in the art can achieve. When the directional reference is bidirectional, it should be considered that two different embodiments are introduced in parallel.

[0074] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0075] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A housing assembly for an energy storage device having a cavity therein, characterized in that: The shell assembly is provided with a connecting hole connected to the cavity, and the connecting hole includes a first opening facing the cavity and a second opening away from the cavity; wherein, the projection plane is perpendicular to the opening axis of the first opening, the first opening forms a first orthographic projection on the projection plane, and the second opening forms a second orthographic projection on the projection plane, and the first orthographic projection is at least partially located on the upper side of the second orthographic projection.

2. The housing assembly according to claim 1, wherein: The first orthographic projection includes a first bottom endpoint at its bottom, the first bottom endpoint has a first height H1, and the second orthographic projection includes a second bottom endpoint at its bottom, the second bottom endpoint has a second height H2, wherein 10mm≤H1-H2≤50mm.

3. The housing assembly according to claim 1, wherein: The connecting hole includes a hole axis passing through the first orifice and the second orifice, the hole axis is a straight line, the horizontal plane is perpendicular to the projection plane, and the angle between the hole axis and the horizontal plane is α, wherein α satisfies: 10°≤α≤45°.

4. The housing assembly according to claim 1, wherein: The connecting hole includes a first hole section and a second hole section that are arranged opposite to each other, the first hole section includes the first hole opening, and the second hole section includes the second hole opening; The first hole section has a first hole axis passing through the first hole, and the second hole section has a second hole axis passing through the second hole. The first hole axis and the second hole axis are both straight lines and perpendicular to the projection plane, and the first orthographic projection and the second orthographic projection partially overlap or are spaced apart.

5. The housing assembly according to claim 4, wherein: The connecting hole includes a third hole section located between the first hole section and the second hole section, the third hole section has a third orifice and a third orifice axis passing through the third orifice, the third orifice axis is a straight line and is perpendicular to the projection plane, the third orifice forms a third orthographic projection on the projection plane, and the third orthographic projection partially overlaps with the first orthographic projection and the second orthographic projection.

6. The housing assembly according to claim 1, wherein: The connecting hole includes a first hole section and a second hole section that are oppositely arranged, the first hole section includes the first hole opening, and the second hole section includes the second hole opening; and The first bore section has a first bore axis passing through the first bore, the first bore axis being a curve, and / or the second bore section has a second bore axis passing through the second bore, the second bore axis being a curve.

7. The housing assembly according to claim 6, wherein: The connecting hole includes a third hole section located between the first hole section and the second hole section. The third hole section has a third orifice and a third orifice axis passing through the third orifice. The third orifice axis is a curve.

8. The housing assembly according to claim 1, wherein: The projection area of ​​the first orthographic projection is larger than the projection area of ​​the second orthographic projection, or the projection area of ​​the first orthographic projection is equal to the projection area of ​​the second orthographic projection.

9. An energy storage device, characterized in that include: The housing assembly according to any one of claims 1 to 8; A battery module is arranged in the cavity.

10. The energy storage device according to claim 9, characterized in that The energy storage device includes a wire, which passes through the connection hole and is electrically connected to the battery module.

11. The energy storage device according to claim 10, wherein: The energy storage device further includes a sealing portion, which is at least partially disposed in the connecting hole and connects an inner wall of the connecting hole and the wire.

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