Energy storage devices and their protection structures, mobile energy storage systems

Abstract

This utility model relates to an energy storage device and its protective structure, as well as a mobile energy storage system. The protective structure of the energy storage device includes multiple first protective ribs, multiple second protective ribs, and multiple support portions. The multiple first protective ribs are spaced apart from each other at the bottom of the liquid-cooled plate, and each first protective rib extends longitudinally. The multiple second protective ribs are spaced apart from each other at the bottom of the liquid-cooled plate and intersect with the first protective ribs. The top surfaces of the multiple first protective ribs and the multiple second protective ribs together form a support plane. Multiple support portions are disposed on the first or second protective ribs and protrude from the support plane. Each support portion is correspondingly arranged between two adjacent liquid-cooled channels of the liquid-cooled plate to support the liquid-cooled plate. This protective structure can support and protect the liquid-cooled plate, effectively reducing the risk of failure of the liquid-cooled plate and the battery cell module. The multiple support portions further ensure the long-term effectiveness of the liquid-cooled plate's performance and guarantee the safety of the energy storage device.

Description

Technical Field

[0001] This utility model relates to the field of energy storage vehicle technology, and in particular to an energy storage device and its protective structure, and a mobile energy storage system. Background Technology

[0002] Mobile power vehicles are a new type of energy storage that mounts traditional stationary containerized energy storage systems onto vehicles. They solve the problem of traditional stationary containerized energy storage systems being immobile, providing users with timely, long-distance charging and discharging capabilities.

[0003] At the same time, mobile power supply vehicles have also encountered new problems. For example, when driving on rough roads (potholes, gravel roads, washboard roads, cobblestone roads, etc.), the strong vibrations and impacts experienced by the vehicle body will negatively affect the safety performance and functionality of the battery pack system. Among the potential negative impacts, the most prominent is the failure of the battery pack's cell modules and the liquid cooling plate at the bottom.

[0004] Therefore, there is an urgent need to design an energy storage device that can reduce the risk of failure of the battery pack's cell modules and bottom liquid cooling plate. Utility Model Content

[0005] One objective of this invention is to address the shortcomings of existing technologies and provide a protective structure for energy storage devices. To solve the aforementioned technical problems, this invention adopts the following technical solution:

[0006] A protective structure for an energy storage device, the energy storage device including a housing and a liquid cooling plate, the liquid cooling plate being disposed at the bottom of the housing, the circumferential edge of the liquid cooling plate being connected and fixed to the circumferential edge of the housing to form an accommodating space for installing a battery cell module; the protective structure includes:

[0007] Multiple first protective ribs are arranged at intervals at the bottom of the liquid cooling plate, and each first protective rib extends longitudinally.

[0008] Multiple second protective ribs are arranged at intervals at the bottom of the liquid cooling plate. Each second protective rib intersects with the first protective rib. The top surfaces of the multiple first protective ribs and the top surfaces of the multiple second protective ribs together form a support plane for contacting the bottom of the liquid cooling plate.

[0009] Multiple support parts are provided on the first or second protective rib and protrude from the support plane. Each support part is respectively arranged between two adjacent liquid cooling channels of the liquid cooling plate to support the liquid cooling plate.

[0010] In one embodiment, the height of each support protruding from the support plane is not less than the height of the liquid cooling channel of the liquid cooling plate.

[0011] In one embodiment, the bottom of the circumferential edge of the liquid cooling plate is provided with an annular frame along the circumferential direction, the annular frame including two longitudinal frames and two transverse frames.

[0012] The multiple first protective ribs include two side protective ribs respectively corresponding to the two longitudinal frames, and each side protective rib is connected and fixed to the inner side of the corresponding longitudinal frame.

[0013] In one embodiment, a plurality of second protective ribs are connected in parallel and spaced apart between two side protective ribs, and the two ends of each second protective rib are respectively connected and fixed to the two side protective ribs.

[0014] In one embodiment, each of the second protective ribs intersects the first protective rib perpendicularly.

[0015] In one embodiment, the protective structure further includes a protective frame, which is disposed on top of the circumferential edge of the housing, corresponding to the circumferential edge of the housing, and the protective frame is attached to and connected to the top surface of the circumferential edge of the housing.

[0016] Another objective of this utility model is to provide an energy storage device, including a battery cell module, a housing and a liquid cooling plate, and a protective structure as described in any of the above. The liquid cooling plate is disposed at the bottom of the housing, and the circumferential edge of the liquid cooling plate is connected and fixed to the circumferential edge of the housing. The battery cell module is installed in the accommodating space between the housing and the liquid cooling plate.

[0017] Multiple first protective ribs and multiple second protective ribs are set at the bottom of the liquid cooling plate to support the liquid cooling plate.

[0018] In one embodiment, the energy storage device further includes a sealing ring disposed between the circumferential edge of the housing and the circumferential edge of the liquid cooling plate.

[0019] In one embodiment, the energy storage device further includes a fixing structure that is detachably connected to the circumferential edge of the housing and the circumferential edge of the liquid cooling plate. The fixing structure is used to fix the energy storage device to an external fixture.

[0020] Another objective of this utility model is to provide a mobile energy storage system, including a vehicle body and an energy storage device as described in any of the above, wherein the energy storage device is fixedly installed on the vehicle body.

[0021] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0022] In this invention, the protective structure of the energy storage device includes multiple first protective ribs, multiple second protective ribs, and multiple support parts. The multiple first and second protective ribs are all disposed at the bottom of the liquid cooling plate. The top surfaces of the multiple first and second protective ribs together form a support plane for contacting the bottom of the liquid cooling plate. Therefore, the multiple first and second protective ribs not only support the liquid cooling plate and enhance the bending and torsional resistance of the bottom of the energy storage device, but also protect the liquid cooling plate from direct external impacts and collisions, effectively reducing the risk of liquid cooling plate failure. Furthermore, since the liquid cooling plate is not directly subjected to external impacts and collisions, it effectively prevents damage to the battery cell module from external impacts and collisions, thus ensuring the safety of the battery cell module and guaranteeing the performance of the energy storage device.

[0023] Furthermore, by setting multiple support parts, each support part is respectively arranged between two adjacent liquid cooling channels of the liquid cooling plate, that is, the non-protruding part of the bottom surface of the liquid cooling plate. Thus, each support part can directly abut against the non-protruding part of the bottom surface of the liquid cooling plate to support it, avoiding the fact that the supporting force of the first or second protective ribs on the liquid cooling plate is entirely applied to the protruding part of the bottom surface of the liquid cooling plate, i.e., the bottom surface of the liquid cooling channel. This effectively reduces the possibility of deformation of the liquid cooling channel under stress, ensuring the long-term effectiveness of the liquid cooling plate's performance and guaranteeing the safety of the energy storage device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the energy storage device according to an embodiment of the present invention.

[0025] Figure 2 yes Figure 1 A schematic diagram of the bottom of the energy storage device shown.

[0026] Figure 3 yes Figure 1 A side view of the energy storage device shown.

[0027] Figure 4 yes Figure 3 A schematic diagram of the AA cross-section of the structure shown.

[0028] Figure 5 This is a schematic diagram of the fixed structure of the energy storage device according to an embodiment of the present invention.

[0029] Figure 6 yes Figure 4 An enlarged schematic diagram of point B in the structure shown.

[0030] Figure 7 yes Figure 1 An exploded view of the liquid cooling plate and its bottom structure in the energy storage device shown.

[0031] The annotations in the attached figures are explained as follows:

[0032] 10 - Energy storage device; 101 - Battery cell module; 20 - Mounting column;

[0033] 100 - Outer shell;

[0034] 200 - Liquid cooling plate; 210 - Liquid cooling channel; 211 - Heat-conducting plate; 212 - Flow channel plate; 220 - Annular frame; 221 - Vertical frame; 222 - Horizontal frame; 223 - Connecting hole; 230 - Second perforation;

[0035] 300 - Protective Structure;

[0036] 310 - First protective reinforcement; 311 - Side protective reinforcement;

[0037] 320 - Second protective reinforcement;

[0038] 330 - Support part; 340 - Protective frame; 341 - Fourth perforation;

[0039] 400 - Fixed structure; 410 - Support plate; 411 - First plate; 412 - Second plate; 413 - Fixing hole; 414 - Fastening hole;

[0040] 500 - Sealing ring. Detailed Implementation

[0041] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0042] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] Please see Figure 1As shown, this application provides a mobile energy storage system, including a vehicle body and an energy storage device 10. The vehicle body can be a semi-trailer body or other transport vehicle body.

[0045] The energy storage device 10 is fixedly mounted on the vehicle body. For example, such as Figures 1 to 5 As shown, the energy storage device 10 includes a battery cell module 101, a housing 100, a liquid cooling plate 200, a protective structure 300, and a fixing structure 400. The battery cell module 101 can be a module composed of multiple battery cells. Multiple modules are combined in a certain way and encapsulated using the housing 100 and the liquid cooling plate 200 to form the energy storage device 10.

[0046] For example, the overall shape of the energy storage device 10 can be a cuboid. In this application, for ease of description, the length direction of the energy storage device 10 is defined as the longitudinal direction, and the width direction of the energy storage device 10 is defined as the transverse direction.

[0047] like Figure 1 As shown, the outer casing 100 can be a plastic box structure with an opening at the bottom. Using plastic material for the outer casing 100 can achieve the purposes of weight reduction, cost reduction, and better insulation.

[0048] The outer casing 100 may have a plurality of first through holes on its circumferential edge, each for fasteners such as bolts to pass through. For example, the opening edge at the bottom of the outer casing 100 may have an annular flange, which may be perpendicular to the side wall of the outer casing 100. The plurality of first through holes may all be formed on the flange and arranged at intervals along the circumference.

[0049] like Figure 1 As shown, a liquid cooling plate 200 is disposed at the bottom of the housing 100, and the circumferential edge of the liquid cooling plate 200 is connected and fixed to the circumferential edge of the housing 100. For example, combined with... Figure 7 As shown, the circumferential edge of the liquid cooling plate 200 has multiple second through holes 230 corresponding to the multiple first through holes on the flange of the outer casing 100. The multiple second through holes 230 are arranged one-to-one with the multiple first through holes. Each second through hole 230 is used for fasteners such as bolts to pass through, so that by using fasteners to pass through the first through holes and the corresponding second through holes 230 in sequence, the outer casing 100 and the liquid cooling plate 200 can be connected and fixed.

[0050] After the outer casing 100 is connected and fixed to the liquid cooling plate 200, a hollow accommodating space is formed between them. Multiple battery cell modules 101 are installed in the accommodating space between the outer casing 100 and the liquid cooling plate 200. The liquid cooling plate 200 is located at the bottom of the multiple battery cell modules 101 and is used to contact the battery cell modules 101 to exchange heat with them and cool the battery cells.

[0051] See Figure 6 The liquid cooling plate 200 can be structured as follows: It includes a heat-conducting plate 211 and a flow channel plate 212 stacked on top of each other. A liquid cooling flow channel 210 can be formed between the heat-conducting plate 211 and the flow channel plate 212, allowing coolant to flow through. The heat-conducting plate 211 is a flat plate used to contact the bottom of multiple battery cell modules 101. The flow channel plate 212 has concave flow channels. After the flow channel plate 212 is connected and fixed to the heat-conducting plate 211, a liquid cooling flow channel 210 for coolant flow is formed between the concave flow channel on the flow channel plate 212 and the heat-conducting plate 211. For example, the heat-conducting plate 211 and the flow channel plate 212 can be connected and fixed by sealed brazing.

[0052] It is understood that in other embodiments, the liquid cooling plate 200 may also adopt other structural forms, which can be set according to actual needs. For example, the liquid cooling plate 200 may include a base plate and a liquid cooling pipe fixed to the bottom of the base plate, with a liquid cooling flow channel 210 formed inside the liquid cooling pipe for the flow of coolant. The liquid cooling pipe and the base plate may be connected by welding.

[0053] See Figure 2 In one embodiment, the bottom of the circumferential edge of the liquid cooling plate 200 is provided with an annular frame 220, which includes two longitudinal frames 221 and two transverse frames 222. In this embodiment, the annular frame 220 is mainly used to strengthen the structural strength at the circumferential edge of the energy storage device 10, and can also serve as a connection base between the energy storage device 10 and external fixed objects, thereby helping to ensure the reliability of the fixation of the energy storage device 10.

[0054] Furthermore, for the energy storage device 10 itself, the annular frame 220 can serve as a connection base for connecting the circumferential edge of the liquid cooling plate 200 and the circumferential edge of the outer casing 100, thereby ensuring a reliable connection between the outer casing 100 and the liquid cooling plate 200.

[0055] Specifically, two longitudinal frame borders 221 are arranged in parallel and spaced apart, both extending longitudinally. Two transverse frame borders 222 are arranged in parallel and spaced apart, both extending transversely. The two ends of each transverse frame border 222 are respectively connected and fixed to the two longitudinal frame borders 221. The connection between each transverse frame border 222 and each longitudinal frame border 221 can be welded. Thus, the two longitudinal frame borders 221 and the two transverse frame borders 222 can be combined to form an annular frame border 220, and the shape of the annular frame border 220 matches the circumferential edge shape of the outer casing 100 and the liquid cooling plate 200.

[0056] like Figure 2As shown, each longitudinal frame 221 and each transverse frame 222 is provided with a connecting hole 223 for fasteners to pass through. Specifically, in the height direction of the energy storage device 10, each connecting hole 223 corresponds to a first through hole on the flange of the outer casing 100 and a second through hole 230 on the circumferential edge of the liquid cooling plate 200. This allows a fastener to pass through the first through hole, the second through hole 230, and the connecting hole 223 sequentially from top to bottom, thereby achieving the purpose of connecting and fixing the outer casing 100, the liquid cooling plate 200, and the annular frame 220.

[0057] See Figure 6 In one embodiment, the energy storage device 10 further includes a sealing ring 500 disposed between the circumferential edge of the housing 100 and the circumferential edge of the liquid cooling plate 200. Specifically, the sealing ring 500 is disposed between the flange at the bottom of the housing 100 and the circumferential edge of the liquid cooling plate 200.

[0058] The sealing ring 500 can be made of materials such as rubber. The shape of the sealing ring 500 matches the shape of the flange at the bottom of the housing 100 and the circumferential edge of the liquid cooling plate 200. For example, the sealing ring 500 can be a ring structure formed by connecting multiple long strips of sealing strips end to end. Alternatively, the sealing ring 500 can also be a one-piece ring structure, which can be set according to actual needs.

[0059] It is understood that the sealing ring 500 has multiple third through holes corresponding to the flange of the outer shell 100, and each third through hole is used for fasteners such as bolts to pass through.

[0060] Therefore, in this embodiment, when connecting the outer casing 100 to the liquid cooling plate 200, fasteners such as bolts can be used to sequentially pass through the first through hole on the circumferential edge of the outer casing 100, the third through hole on the sealing ring 500, the second through hole 230 on the circumferential edge of the liquid cooling plate 200, and the connecting hole 223 on the annular frame 220 from top to bottom, thereby achieving the purpose of connecting and fixing the outer casing 100, the liquid cooling plate 200, and the annular frame 220. Simultaneously, the presence of the sealing ring 500 ensures an effective seal at the connection between the outer casing 100 and the liquid cooling plate 200. Furthermore, the presence of the annular frame 220 enhances the connection reliability between the circumferential edge of the liquid cooling plate 200 and the circumferential edge of the outer casing 100, and also helps to improve the connection reliability between the energy storage device 10 and external fixed objects.

[0061] In this application, the fixing structure 400 is used to fix the energy storage device 10 to an external fixed object, for example, the external fixed object may be the vehicle body.

[0062] See Figure 5The fixing structure 400 is detachably connected to the circumferential edges of the outer casing 100 and the liquid cooling plate 200. For example, the fixing structure 400 may include two support plates 410, which are spaced apart from each other and respectively located below the two longitudinal frame edges 221. Each support plate 410 may include an integrally formed first plate 411 and a second plate 412, which are vertically connected and can form an L-shaped groove. The L-shaped groove of each support plate 410 can be used to accommodate the longitudinal edge of the bottom of the energy storage device 10.

[0063] The first plate 411 is used to contact and connect with the longitudinal frame 221 at the bottom of the energy storage device 10. For example, the first plate 411 may have multiple fixing holes 413 for fasteners to pass through, and each fixing hole 413 is arranged corresponding to the connection hole 223 on the longitudinal frame 221. When connecting the energy storage device 10 to the first plate 411, fasteners such as bolts can be used to pass through the first through hole on the circumferential edge of the outer shell 100, the third through hole on the sealing ring 500, the second through hole 230 on the circumferential edge of the liquid cooling plate 200, the connection hole 223 on the longitudinal frame 221, and the fixing hole 413 on the first plate 411 from top to bottom. Thus, the connection and fixation between the energy storage device 10 and the fixed structure 400 can be achieved by fasteners.

[0064] The second plate 412 is used for connection and fixation to the vehicle body. For example, see Figure 5 The vehicle body can be provided with multiple sets of paired mounting columns 20, with the two mounting columns 20 in each set spaced apart from each other and each mounting column 20 facing the outer side of the second plate 412 of the corresponding support plate 410. The second plate 412 and the corresponding mounting column 20 can be provided with fastening holes 414 for fasteners to pass through, so that the connection and fixation between the fixing structure 400 and the vehicle body can be realized by fasteners, thereby realizing the connection and fixation between the energy storage device 10 and the vehicle body.

[0065] In this application, the protective structure 300 is used to protect the liquid cooling plate 200 and the outer casing 100 of the energy storage device 10, so that the liquid cooling plate 200 and the outer casing 100 are protected from damage by external forces. The specific embodiments of the protective structure 300 of the energy storage device 10 of this application will be described in detail below with reference to the accompanying drawings.

[0066] See Figure 2According to an embodiment of this application, the protective structure 300 of the energy storage device 10 includes a plurality of first protective ribs 310, a plurality of second protective ribs 320, and a plurality of support portions 330. The plurality of first protective ribs 310 and the plurality of second protective ribs 320 are all disposed at the bottom of the liquid cooling plate 200. The top surfaces of the plurality of first protective ribs 310 and the top surfaces of the plurality of second protective ribs 320 together form a support plane for contacting the bottom of the liquid cooling plate 200.

[0067] Optionally, each first protective rib 310 can be made of U-shaped channel steel, and each first protective rib 310 can be arranged with its opening facing downwards at the bottom of the liquid cooling plate 200. Each second protective rib 320 can also be made of U-shaped channel steel, and each second protective rib 320 can be arranged with its opening facing downwards at the bottom of the liquid cooling plate 200. Using U-shaped channel steel for the first and second protective ribs 310 and 320 results in lower manufacturing costs and lighter weight. It is understood that in other embodiments, the first and second protective ribs 310 and 320 can also be made of other materials, such as square steel or aluminum alloy profiles, etc.

[0068] In this application, by providing multiple first protective ribs 310 and multiple second protective ribs 320 at the bottom of the liquid cooling plate 200, the multiple first protective ribs 310 and multiple second protective ribs 320 can support and protect the liquid cooling plate 200, preventing the liquid cooling plate 200 from being directly subjected to external impacts and collisions, thereby effectively reducing the risk of failure of the liquid cooling plate 200. Furthermore, since the liquid cooling plate 200 is not directly subjected to external impacts and collisions, it can more effectively prevent external impacts and collisions from damaging the cell module 101, thereby ensuring the safety of the cell module 101 and guaranteeing the performance of the energy storage device 10.

[0069] Specifically, multiple first protective ribs 310 are spaced apart at the bottom of the liquid cooling plate 200, and each first protective rib 310 extends longitudinally. The multiple first protective ribs 310 extending longitudinally can enhance the bending and torsional resistance of the energy storage device 10 in the longitudinal direction, thereby improving the structural stability of the energy storage device 10 and ensuring the safe and reliable use of the energy storage device 10.

[0070] like Figure 2 As shown, in one embodiment, the plurality of first protective ribs 310 include two side protective ribs 311 respectively corresponding to two longitudinal frame edges 221, and each side protective rib 311 is connected and fixed to the inner side surface of the corresponding longitudinal frame edge 221. Optionally, the side surface of each side protective rib 311 is welded to the side surface of the corresponding longitudinal frame edge 221. The two ends of each side protective rib 311 can be welded to two transverse frame edges 222 respectively.

[0071] In this embodiment, the side protective ribs 311 not only protect the liquid cooling plate 200 from the bottom, but also reinforce the longitudinal edge of the energy storage device 10 from the side, thereby more effectively protecting the liquid cooling plate 200 and the battery cell module 101, and further improving the safety and reliability of the energy storage device 10.

[0072] like Figure 2 As shown, multiple second protective ribs 320 are spaced apart at the bottom of the liquid cooling plate 200, and each second protective rib 320 intersects with the first protective rib 310. For example, each second protective rib 320 may intersect the first protective rib 310 perpendicularly. That is, each second protective rib 320 extends laterally. Thus, the multiple second protective ribs 320 extending laterally can enhance the bending and torsional resistance of the energy storage device 10 in the lateral direction, improve the structural stability of the energy storage device 10, and ensure the safe use of the energy storage device 10.

[0073] See Figure 2 In one embodiment, a plurality of second protective ribs 320 are connected in parallel and spaced apart between two side protective ribs 311, and the two ends of each second protective rib 320 are respectively connected and fixed to the two side protective ribs 311. The ends of each second protective rib 320 and the corresponding side protective rib 311 may be welded together.

[0074] It is understood that in other embodiments, each of the second protective ribs 320 may be arranged at a different angle to the first protective rib 310. The plurality of second protective ribs 320 may be parallel to each other or non-parallel to each other.

[0075] like Figure 2 and Figure 7 As shown, multiple support portions 330 are disposed on the first protective rib 310 or the second protective rib 320 and protrude from the support plane. Each support portion 330 is respectively arranged between two adjacent liquid cooling channels 210 of the liquid cooling plate 200 to support the liquid cooling plate 200.

[0076] It is understood that, since the liquid cooling plate 200 is provided with liquid cooling channels 210 for the flow of coolant, the surface portion of the liquid cooling plate 200 protrudes. Specifically, the liquid cooling channels 210 cause the bottom surface of the liquid cooling plate 200 to protrude downwards, with the protruding portion corresponding to the location of the liquid cooling channels 210. That is, the non-protruding portion of the bottom surface of the liquid cooling plate 200 is the bottom surface of the main body of the liquid cooling plate 200, and the protruding portion of the bottom surface of the liquid cooling plate 200 is the bottom surface of the liquid cooling channels 210. It is understood that each support portion 330 is correspondingly arranged on the non-protruding portion of the bottom surface of the liquid cooling plate 200.

[0077] In this application, multiple support portions 330 are provided, each of which is respectively arranged between two adjacent liquid cooling channels 210 of the liquid cooling plate 200, i.e., the non-protruding part of the bottom surface of the liquid cooling plate 200. Thus, each support portion 330 can directly abut against the non-protruding part of the bottom surface of the liquid cooling plate 200 to support the liquid cooling plate 200, avoiding the support force of the first protective rib 310 or the second protective rib 320 acting entirely on the protruding part of the bottom surface of the liquid cooling plate 200, i.e., the bottom surface of the liquid cooling channel 210. This effectively reduces the possibility of deformation of the liquid cooling channel 210 under stress, ensuring the long-term effectiveness of the liquid cooling plate 200 and guaranteeing the safety of the energy storage device 10.

[0078] See Figure 6 In one embodiment, the height of each support portion 330 protruding from the support plane is not less than the height of the liquid cooling channel 210 of the liquid cooling plate 200. For example, the height of each support portion 330 protruding from the support plane can be equal to the height of the liquid cooling channel 210 of the liquid cooling plate 200. That is, when each support portion 330 abuts against the non-protruding portion of the bottom surface of the liquid cooling plate 200, the bottom surface of the liquid cooling channel 210 abuts against the support plane. At this time, the supporting plane formed by the multiple first protective ribs 310 and the multiple second protective ribs 320, as well as the various supporting parts 330, can jointly support the liquid cooling plate 200, avoiding the fact that the weight of the liquid cooling plate 200 and the battery cell module 101 on it is only borne by the contact point between the bottom surface of the liquid cooling channel 210 and the supporting plane. It also avoids that external impacts and collisions are completely acted on the bottom surface of the liquid cooling channel 210, thereby effectively reducing the possibility of deformation of the liquid cooling channel 210 under stress, ensuring the long-term effectiveness of the liquid cooling plate 200, and guaranteeing the safety of the energy storage device 10.

[0079] Alternatively, in other embodiments, the height of each support portion 330 protruding from the support plane can be higher than the height of the liquid cooling channel 210 of the liquid cooling plate 200. In this case, when each support portion 330 abuts against the non-protruding portion of the bottom surface of the liquid cooling plate 200, there is a gap between the bottom surface of the liquid cooling channel 210 and the support plane. Thus, multiple support portions 330 can independently support the liquid cooling plate 200, avoiding the gravity of the liquid cooling plate 200 and the battery cell module 101 on it from acting on the contact point between the bottom surface of the liquid cooling channel 210 and the support plane. It also avoids external impacts and collisions acting on the bottom surface of the liquid cooling channel 210, thereby effectively reducing the possibility of deformation of the liquid cooling channel 210 under stress, ensuring the long-term effectiveness of the performance of the liquid cooling plate 200, and guaranteeing the safety of the energy storage device 10.

[0080] For example, such as Figure 2As shown, the liquid cooling channel 210 protruding from the bottom surface of the liquid cooling plate 200 includes multiple longitudinally extending channels arranged at intervals. Multiple support portions 330 can be respectively protruded from the top surface of multiple second protective ribs 320, and each support portion 330 can be correspondingly located in the interval between two longitudinally extending channels to abut against the bottom surface of the liquid cooling plate 200.

[0081] Of course, in other embodiments, some support portions 330 may be provided on the first protective rib 310 as needed, or multiple support portions 330 may be provided on the first protective rib 310 and the second protective rib 320, as long as each support portion 330 can avoid the liquid cooling channel 210 and abut against the non-protruding part of the bottom surface of the liquid cooling plate 200.

[0082] For example, such as Figure 7 As shown, each support portion 330 can be a block structure. Each support portion 330 can be made of elastic materials such as rubber to elastically support the liquid cooling plate 200, and to further eliminate the impact of external impacts and collisions on the liquid cooling plate 200 and the battery cell module 101, thus ensuring the safety of the energy storage device 10.

[0083] See Figure 1 In one embodiment, the protective structure 300 further includes a protective frame 340, which is disposed on top of the circumferential edge of the housing 100. Specifically, the shape of the protective frame 340 matches the shape of the flange of the housing 100, and the protective frame 340 covers the flange of the housing 100 from top to bottom.

[0084] The protective frame 340 can be made of materials such as steel plate or aluminum alloy plate. The protective frame 340 is attached to and fixed to the top surface of the circumferential edge of the outer shell 100, that is, the top surface of the flange of the outer shell 100. For example, the protective frame 340 has multiple fourth through holes 341 corresponding to the multiple first through holes on the flange of the outer shell 100. Each fourth through hole 341 is used for fasteners such as bolts to pass through. This allows a fastener to pass through the fourth through hole 341, the first through hole, the third through hole, the second through hole 230 and the connecting hole 223 from top to bottom, so as to achieve the purpose of connecting and fixing the protective frame 340, the outer shell 100, the liquid cooling plate 200 and the annular frame 220.

[0085] In this application, by setting the protective frame 340, the structural strength of the circumferential edge of the outer shell 100 can be increased, and the ability of the outer shell 100 to resist deformation and cracking under vibration and impact can be enhanced. This can effectively reduce the failure risk of the outer shell 100 cracking under vibration and impact, and achieve the purpose of improving the performance of the energy storage device 10 under harsh working conditions for longer.

[0086] The protective structure of the energy storage device in this embodiment includes multiple first protective ribs, multiple second protective ribs, and multiple support portions. The multiple first and second protective ribs are all disposed at the bottom of the liquid cooling plate. The top surfaces of the multiple first and second protective ribs together form a support plane for contacting the bottom of the liquid cooling plate. Therefore, the multiple first and second protective ribs not only support the liquid cooling plate and enhance the bending and torsional resistance of the bottom of the energy storage device, but also protect the liquid cooling plate from direct external impacts and collisions, effectively reducing the risk of liquid cooling plate failure. Furthermore, since the liquid cooling plate is not directly subjected to external impacts and collisions, it effectively prevents damage to the battery cell module from external impacts and collisions, thereby ensuring the safety of the battery cell module and guaranteeing the performance of the energy storage device.

[0087] Furthermore, by setting multiple support parts, each support part is respectively arranged between two adjacent liquid cooling channels of the liquid cooling plate, that is, the non-protruding part of the bottom surface of the liquid cooling plate. Thus, each support part can directly abut against the non-protruding part of the bottom surface of the liquid cooling plate to support it, avoiding the fact that the supporting force of the first or second protective ribs on the liquid cooling plate is entirely applied to the protruding part of the bottom surface of the liquid cooling plate, i.e., the bottom surface of the liquid cooling channel. This effectively reduces the possibility of deformation of the liquid cooling channel under stress, ensuring the long-term effectiveness of the liquid cooling plate's performance and guaranteeing the safety of the energy storage device.

[0088] Since the protective structure of the energy storage device of this application has the aforementioned beneficial effects, the energy storage device and mobile energy storage system that include the protective structure also have corresponding effective effects, which will not be elaborated here.

[0089] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0090] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or substance of the application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A protective structure for an energy storage device, the energy storage device comprising a housing and a liquid cooling plate, the liquid cooling plate being disposed at the bottom of the housing, the circumferential edge of the liquid cooling plate being connected and fixed to the circumferential edge of the housing to form an accommodating space for installing a battery cell module; characterized in that, The protective structure includes: Multiple first protective ribs are arranged at intervals at the bottom of the liquid cooling plate, and each first protective rib extends longitudinally. Multiple second protective ribs are arranged at intervals at the bottom of the liquid cooling plate. Each second protective rib intersects with the first protective rib. The top surfaces of the multiple first protective ribs and the top surfaces of the multiple second protective ribs together form a support plane for contacting the bottom of the liquid cooling plate. Multiple support portions are disposed on the first or second protective rib and protrude from the support plane. Each of the support portions is respectively arranged between two adjacent liquid cooling channels of the liquid cooling plate to support the liquid cooling plate.

2. The protective structure of the energy storage device according to claim 1, characterized in that, The height of each of the support portions protruding from the support plane is not less than the height of the liquid cooling channel of the liquid cooling plate.

3. The protective structure of the energy storage device according to claim 1, characterized in that, The bottom of the circumferential edge of the liquid cooling plate is provided with an annular frame, which includes two longitudinal frames and two transverse frames. The plurality of first protective ribs include two side protective ribs respectively corresponding to the two longitudinal frames, and each side protective rib is connected and fixed to the inner side surface of the corresponding longitudinal frame.

4. The protective structure of the energy storage device according to claim 3, characterized in that, Multiple second protective ribs are connected in parallel and spaced apart between two side protective ribs, and the two ends of each second protective rib are respectively connected and fixed to the two side protective ribs.

5. The protective structure of the energy storage device according to claim 1, characterized in that, Each of the second protective reinforcement bars intersects the first protective reinforcement bar perpendicularly.

6. The protective structure of the energy storage device according to any one of claims 1-5, characterized in that, The protective structure also includes a protective frame, which is disposed on the top of the circumferential edge of the housing, corresponding to the circumferential edge of the housing. The protective frame is attached to and connected to the top surface of the circumferential edge of the housing.

7. An energy storage device, characterized in that, The device includes a battery cell module, a housing, and a liquid cooling plate, as well as a protective structure according to any one of claims 1-6, wherein the liquid cooling plate is disposed at the bottom of the housing, the circumferential edge of the liquid cooling plate is connected and fixed to the circumferential edge of the housing, and the battery cell module is installed in the accommodating space between the housing and the liquid cooling plate; Multiple first protective ribs and multiple second protective ribs are disposed at the bottom of the liquid cooling plate to support the liquid cooling plate.

8. The energy storage device according to claim 7, characterized in that, It also includes a sealing ring disposed between the circumferential edge of the housing and the circumferential edge of the liquid cooling plate.

9. The energy storage device according to claim 7, characterized in that, It also includes a fixing structure, which is detachably connected to the circumferential edge of the outer shell and the circumferential edge of the liquid cooling plate. The fixing structure is used to fix the energy storage device on an external fixed object.

10. A mobile energy storage system, characterized in that, It includes a vehicle body and an energy storage device as described in any one of claims 7 to 9, wherein the energy storage device is fixedly installed on the vehicle body.

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