Aircraft battery

Abstract

This application relates to an aviation battery, including a casing and an energy storage unit, a support plate, and an electrical unit disposed within the casing. The bottom wall of the casing has spaced-apart limiting strips, and between adjacent limiting strips are spaced-apart height limiting strips with a height lower than the limiting strips. The energy storage unit is placed on the height limiting strips and abuts against two adjacent limiting strips in the length or width direction of the casing. Each limiting strip has an overflow space, which communicates with the gap formed between two adjacent height limiting strips. The support plate supports the electrical unit above the energy storage unit, and the support plate and the energy storage unit are jointly fixed to the bottom wall of the casing by fasteners. This design ensures that the adhesive is evenly spread and excess adhesive is drained during the coating process, meeting the uniformity and controllability requirements of aviation-grade adhesive coating. Simultaneously, the double-layer structure improves spatial integration, reduces the number of fasteners, enhances overall structural stability, and solves the problem of difficult component assembly in confined spaces.

Description

Technical Field

[0001] This application relates to the field of aviation power battery technology, and in particular to an aviation storage battery. Background Technology

[0002] Currently, most aviation batteries used in electric aircraft and other aircraft are nickel-cadmium batteries, which have disadvantages such as short lifespan and frequent maintenance. With the popularization of lithium-ion battery technology in the field of new energy vehicles, its advantages such as long lifespan, almost maintenance-free operation, and high energy density are gradually being recognized and introduced into the aviation field.

[0003] However, automotive lithium-ion batteries have low integration levels, which cannot meet the high integration requirements of aerospace systems. At the same time, conventional adhesive application methods cannot guarantee that the adhesive is applied evenly and in sufficient quantity in the required area. Especially in the context of the stringent requirements for the reliability and controllability of the adhesive application process in aerospace systems, uneven adhesive application may lead to poor adhesion at the bottom of the cell and uneven stress in some areas, which in turn affects the structural stability and electrical safety of the entire battery system under harsh conditions such as vibration and impact. In addition, the internal space of aerospace batteries is small, and how to complete the arrangement and assembly of components in a limited space has become a technical challenge. Summary of the Invention

[0004] Based on this, the purpose of this application is to provide an aviation battery that can meet the high integration requirements of aviation, ensure uniform and reliable adhesive coating, and facilitate assembly in a confined space, thereby solving the above-mentioned technical problems existing in the application of existing lithium-ion batteries in the aviation field.

[0005] According to one aspect of this application, an aviation battery is provided, comprising: a housing and a storage unit, a support plate, and an electrical unit disposed together within the housing;

[0006] The bottom wall of the housing is provided with at least two spaced limiting strips, and the opposite ends of each limiting strip are respectively connected to the opposite side walls of the housing. At least two spaced height limiting strips with a height lower than the limiting strips are provided between two adjacent limiting strips. The energy storage unit is placed on the height limiting strips and abuts against the two adjacent limiting strips in the length or width direction of the housing. Each limiting strip has an overflow space, and the overflow space is interconnected with the gap formed by each two adjacent height limiting strips.

[0007] The support plate is located above the energy storage unit along the height direction of the housing, and the support plate and the energy storage unit are connected to each other by a number of fasteners and are jointly fixed to the bottom wall of the housing by the fasteners.

[0008] The electrical unit is connected to the energy storage unit, and the electrical unit is fixedly mounted on the side surface of the support plate opposite to the energy storage unit.

[0009] In one embodiment, a baffle strip made of elastic material is provided between each pair of adjacent height limiting strips. The baffle strip forms an adhesive application area between each pair of adjacent height limiting strips. The baffle strip has an overflow outlet, and the adhesive application area is connected to the overflow space through the overflow outlet.

[0010] When the energy storage unit is not placed in the housing, the height of the sealing strip is higher than the height of the height limit strip; when the energy storage unit is placed in the housing, the energy storage unit compresses the sealing strip to the same height as the height limit strip.

[0011] In one embodiment, each of the limiting strips has multiple spaced overflow spaces, the number of which is the same as the number of overflow ports and they are arranged in a one-to-one correspondence.

[0012] In one embodiment, the support plate includes a support body and a plurality of support seats spaced apart from the periphery of the support body. Each support seat is bent and connected to the energy storage unit by the fastener, such that the support body and the energy storage unit are spaced apart.

[0013] In one embodiment, the electrical unit includes an electrical component and a control component. The electrical component is electrically connected to the energy storage unit, and the control component is communicatively connected to the electrical component and electrically connected to the energy storage unit via a cable. The cable is fixedly connected to a plurality of brackets spaced apart on the support plate.

[0014] In one embodiment, the support plate has a plurality of spaced-apart connecting platforms that correspond one-to-one with the brackets. Each bracket includes a body and a connecting part that is perpendicularly connected to the body. The body is attached to the side of a corresponding connecting platform, and the connecting part is fixedly attached to the top surface of a corresponding connecting platform. And / or, each bracket is provided with at least two cross-connected reinforcing ribs.

[0015] In one embodiment, the energy storage unit includes a battery module and two end plates respectively attached to opposite sides of the battery module. Each end plate has a mounting hole extending through its opposite ends along the height direction, and the fastener is detachably inserted through the mounting hole.

[0016] In one embodiment, the top surface of the limiting strip is provided with a threaded blind hole, which is coaxially arranged with the mounting hole.

[0017] In one embodiment, the mounting hole includes a threaded hole and a smooth hole that are sequentially connected from top to bottom along the height direction, the diameter of the threaded hole being larger than the diameter of the smooth hole, and the threaded hole being configured to allow an eye bolt to be inserted and secured therein after the fastener is removed from the mounting hole.

[0018] In one embodiment, the other two opposite sides of the battery module are respectively attached with two side plates that are vertically connected to the two end plates. Each side plate has multiple through holes, and all the through holes are configured to make the stiffness of the side plate gradually decrease from top to bottom along the height direction.

[0019] The aforementioned aviation battery, on the one hand, features height-limiting and positioning strips on the bottom wall of the casing. The battery cell is placed on the height-limiting strip and abuts against it. Simultaneously, an adhesive application area is formed between adjacent height-limiting strips, and the adhesive overflow space is interconnected with this area. During assembly, while ensuring accurate positioning of the battery cell, excess adhesive in the application area is squeezed into the adhesive overflow space as the battery cell is placed into the casing. This ensures a sufficient and uniform adhesive layer between the bottom of the battery cell and the casing, avoiding issues such as insufficient adhesive in certain areas or excessive adhesive thickness. This structural design makes the entire adhesive application process controllable, with uniform and reliable adhesive distribution, fully meeting the stringent requirements of the aviation system for adhesive application as a special process.

[0020] On the other hand, by adopting a double-layer layout structure in which the support plate and the energy storage unit are jointly fixed to the bottom wall of the housing with fasteners, the electrical unit is fixedly mounted on the surface of the support plate opposite to the energy storage unit, thus achieving a three-dimensional arrangement of the electrical unit above the energy storage unit. Compared with the low-integration layout of existing automotive lithium-ion batteries, this application makes full use of the space in the height direction of the housing, significantly reducing the overall projected area in the height direction of the housing. At the same time, the number of fasteners is reduced by the joint fixing method, resulting in a more compact structure that meets the requirements of the aerospace field for high integration, lightweight, and high reliability of devices.

[0021] Finally, the support plate and the energy storage unit are interconnected and jointly fixed to the bottom wall of the housing by several fasteners, forming a complete force transmission path from the electrical unit to the support plate, then to the energy storage unit, and finally to the housing. The overall structure has good rigidity and strong resistance to vibration and impact, meeting the stringent mechanical environment requirements of aviation. At the same time, this integrated design reduces the need for independent brackets and distributed fixing, allowing all components to be positioned and fastened within a limited space. This effectively solves the problem of difficult production and assembly in confined spaces, improving assembly efficiency and consistency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an explosion of an aviation battery provided in an embodiment of this application.

[0023] Figure 2 This is a schematic diagram of the appearance of an aviation battery provided in one embodiment of this application.

[0024] Figure 3 This is a schematic diagram of the internal structure of an aviation battery provided in an embodiment of this application.

[0025] Figure 4 for Figure 3 An enlarged schematic diagram of region A in the middle.

[0026] Figure 5 A partial cross-sectional view of a storage unit provided in an embodiment of this application (fasteners pass through mounting holes).

[0027] Figure 6 This is a schematic diagram of the structure of the housing in an embodiment of this application.

[0028] Figure 7 for Figure 6 A magnified view of region B in the middle.

[0029] Figure 8 This is a cross-sectional view of a portion of the housing provided in an embodiment of this application.

[0030] Figure 9 This is a schematic diagram of the structure of the support plate in an aviation battery provided in one embodiment of this application.

[0031] Figure 10 This is a schematic diagram of the structure of one of the brackets in a wire harness assembly provided in an embodiment of this application.

[0032] Figure 11 This is a schematic diagram of the structure of another bracket in a wire harness assembly provided in one embodiment of this application.

[0033] Figure 12 This is a schematic diagram of the structure of the energy storage unit in an aviation battery provided in an embodiment of this application.

[0034] Figure 13 This is a top view of the end plate of the energy storage unit provided in an embodiment of this application.

[0035] Figure 14 for Figure 13 A cross-sectional view along the CC direction.

[0036] Figure 15 A cross-sectional view of a portion of an energy storage unit provided in an embodiment of this application (fasteners are removed from the mounting holes and eye bolts are tightened in the mounting holes).

[0037] Figure 16 This is a schematic diagram of the structure of a lifting eye bolt provided in one embodiment of this application.

[0038] Figure 17 This is a schematic diagram showing the support plate and the energy storage unit connected to each other via eye bolts, according to an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 10. Aviation battery; 100. Housing; 101. Receiving cavity; 110. Box body; 120. Top cover; 130. Limiting strip; 131. Glue overflow space; 132. Threaded blind hole; 140. Height limit strip; 150. Glue blocking strip; 151. Glue application area; 152. Glue overflow port; 200. Energy storage unit; 210. Battery module; 220. End plate; 221. Mounting hole; 221a. Threaded hole; 221b. Smooth hole; 230. Isolation assembly; 24. 0. Side plate; 241. Through hole; 300. Support plate; 301. Support column; 302. Fixing hole; 303. Connecting platform; 310. Support body; 320. Support base; 400. Electrical unit; 410. Electrical component; 420. Control component; 500. Fastener; 600. Cable assembly; 610. Cable; 620. Bracket; 620a. Reinforcing rib; 621. Body; 622. Connecting part; 700. Lifting eye bolt; 701. Lifting eye. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only 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, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] This application provides an aviation battery for providing and storing electrical energy for the electrical equipment of aircraft such as electric aircraft. It can be used as a main power source or an emergency power source and has extremely high structural integration, reliability and ease of assembly.

[0048] Specifically, see Figure 1 and Figure 2 , Figure 1An explosion diagram of an aviation battery 10 provided in an embodiment of this application is shown. Figure 2 A schematic diagram of the external appearance of the aviation battery 10 according to this embodiment is shown. The aviation battery 10 provided in one embodiment of this application includes a housing 100, an energy storage unit 200, a support plate 300, and an electrical unit 400. The housing 100 serves as the housing and protective structure for the entire battery and is used for mounting on the fuselage of an aircraft. It has an internal cavity 101 in which the energy storage unit 200, support plate 300, and electrical unit 400 are all disposed. The energy storage unit 200 is used to store and release electrical energy. The support plate 300 is connected to the energy storage unit 200 and supports the electrical unit 400. The electrical unit 400 is connected to the energy storage unit 200 and is used for managing, controlling, and distributing electrical energy to the energy storage unit 200.

[0049] In one embodiment, such as Figure 1 As shown, the housing 100 has a split-connection structure to facilitate the installation and removal of the electrical unit 400, support plate 300, and energy storage unit 200 from the housing 100. Specifically, the housing 100 includes a box body 110 and a top cover 120. The receiving cavity 101 is enclosed by the box body 110, and the upper side of the box body 110 has an opening communicating with the receiving cavity 101. The top cover 120 covers the opening of the box body 110 and closes the receiving cavity 101.

[0050] More specifically, regarding the arrangement of the electrical unit 400, the support plate 300, and the energy storage unit 200 within the housing 100, and their interconnection structures, such as... Figure 3 As shown, the energy storage unit 200 is disposed at the bottom of the receiving cavity 101, specifically on the bottom wall of the receiving cavity 101; the support plate 300 is disposed above the energy storage unit 200 along the height direction of the housing 100 (the Z direction shown in the figure); the electrical unit 400 is connected to the energy storage unit 200 and fixedly disposed on the side surface of the support plate 300 opposite to the energy storage unit 200 (i.e., above the support plate 300 along the height direction). Meanwhile, as... Figure 4 As shown, the support plate 300 and the energy storage unit 200 are connected together by a number of fasteners 500 (e.g., long bolts). In the figure, there are four fasteners 500, which are respectively set at the four corners of the support plate 300 and the energy storage unit 200. Of course, the number of fasteners 500 is not limited, and there can be two or more of them spaced apart around the four edges of the support plate 300 and the energy storage unit 200.

[0051] Furthermore, the entire assembly of the support plate 300 and the energy storage unit 200 is also secured to the bottom wall of the housing 100 by the fasteners 500. In other words, as... Figure 5As shown, the support plate 300 has a fixing hole 302, and the energy storage unit 200 has a mounting hole 221. The same set of fasteners 500 pass through both the fixing hole 302 of the support plate 300 and the mounting hole 221 of the energy storage unit 200, and are ultimately locked onto the bottom wall of the housing 100, thus achieving the joint fixation of the support plate 300, the energy storage unit 200, and the housing 100. Furthermore, the electrical unit 400 is integrally fixed on the surface of the support plate 300 opposite to the energy storage unit 200, i.e., on the upper surface of the support plate 300.

[0052] As can be seen, the above structure forms a two-layer three-dimensional layout by arranging the electrical unit 400 above the energy storage unit 200. This layout makes great use of the space inside the housing 100 in the vertical direction, avoids the scattered arrangement of electrical components in the horizontal direction, effectively reduces the space occupied by the aviation battery 10 in the horizontal direction, significantly improves the space utilization and overall integration of the aviation battery 10, and can meet the stringent requirements of the aviation field for high integration of devices and installation in narrow spaces. Meanwhile, by pre-connecting the support plate 300 and the energy storage unit 200 with fasteners 500, and then installing them together into the housing 100 and fixing them to the bottom wall of the housing 100, a complete force transmission path is formed from the electrical unit 400 to the support plate 300, then to the energy storage unit 200, and finally to the housing 100. This not only reduces the number of fasteners 500 and assembly steps, but also improves the overall rigidity of the structure and strengthens its resistance to vibration and impact. Under the severe vibration and impact environment of aircraft, it can effectively prevent relative displacement, improve the reliability of the aviation battery 10, and meet the stringent mechanical environment requirements of aviation.

[0053] It is worth noting that in aviation batteries 10, the energy storage unit 200 typically needs to be bonded to the bottom wall of the casing 100 to enhance structural strength and impact resistance, as well as achieve electrical insulation, in the harsh vibration environment of aviation. The aviation industry has strict requirements for the adhesive coating process, ensuring that the amount, coverage, and uniformity of the adhesive are completely controllable.

[0054] Before the energy storage unit 200 is securely connected to the housing 100, in order to limit the position of the energy storage unit 200 and to achieve the aforementioned purpose of uniform and controllable adhesive application, this application makes special designs to the structure of the housing 100, such as... Figure 6As shown, the bottom wall of the housing 100 (i.e., the bottom wall of the box 110) is provided with at least two spaced limiting strips 130. The opposite ends of each limiting strip 130 are respectively connected to the opposite side walls of the housing 100. At least two spaced height limiting strips 140, which are lower than the limiting strips 130, are provided between adjacent limiting strips 130. In the embodiment shown, the height limiting strips 140 are perpendicular to the limiting strips 130 and are made of rigid material. They are used to precisely control the final thickness of the adhesive layer between the bottom of the energy storage unit 200 and the bottom wall of the housing 100. Each limiting strip 130 has an adhesive overflow space 131, which communicates with the gap formed by each pair of adjacent height limiting strips 140. Correspondingly, the bottom of the energy storage unit 200 has grooves on its opposite edges in the length direction and forms stepped surfaces. In the embodiment shown, the stepped surfaces are formed on the bottom of the end plate 220.

[0055] Thus, during adhesive application, the gaps between adjacent height-limiting strips 140 can be filled with adhesive, slightly submerging the height-limiting strips 140. When the energy storage unit 200 is placed on the height-limiting strip 140, the energy storage unit 200 abuts against the limiting strip 130, that is, the two stepped surfaces at the bottom of the energy storage unit 200 are respectively attached to the top and side surfaces of a limiting strip 130. This allows the limiting strip 130 to not only limit the energy storage unit 200 in the length or width direction, but also allows excess adhesive to overflow into the overflow space 131 opened within the limiting strip 130 under the push of the energy storage unit 200. This ensures sufficient adhesive between the energy storage unit 200 and the bottom wall of the housing 100 and guarantees a uniform adhesive layer thickness. Preferably, as follows... Figure 7 As shown, the top surface of the limiting strip 130 may also have a threaded blind hole 132 for fasteners 500 (e.g., long bolts) to be inserted, so that after the energy storage unit 200 is pre-installed into the housing 100 and abuts against the limiting strip 130, and before the fasteners 500 are tightened, the position of the energy storage unit 200 is already in place, at which point it is combined with... Figure 5 As shown, the threaded blind hole 132 is coaxially aligned with the mounting hole 221 of the energy storage unit 200. Without the operator having to reposition the energy storage unit 200, the fastener 500 can be passed sequentially through the fixing hole 302 of the support plate 300, the mounting hole 221 of the energy storage unit 200, and finally inserted into the threaded blind hole 132 on the limit strip 130. This reduces the number of operation steps and allows the support plate 300 and the energy storage unit 200 to be quickly and easily fastened together to the bottom wall of the housing 100.

[0056] Furthermore, in order to more precisely control the final thickness of the adhesive layer between the bottom of the energy storage unit 200 and the bottom wall of the housing 100, and to ensure that the space between the bottom of the energy storage unit 200 and the bottom wall of the housing 100 is filled with uniform and sufficient adhesive, based on the above embodiments, as follows: Figure 7As shown, a retaining strip 150 made of elastic material (such as silicone or foamed rubber) is provided between each pair of adjacent height limiting strips 140. The retaining strip 150 is annular (e.g., rectangular ring) and forms an adhesive application area 151 between two adjacent height limiting strips 140. An overflow outlet 152 is provided on the retaining strip 150, and the adhesive application area 151 is connected to the overflow space 131 in the limiting strip 130 through the overflow outlet 152.

[0057] like Figure 8 As shown, when the energy storage unit 200 is not placed inside the housing 100, the height of the retaining strip 150 is significantly higher than the height of the height restriction strip 140 (for example, the height of the retaining strip 150 is twice that of the height restriction strip 140). The operator applies twice the designed amount of adhesive to the adhesive application area 151. Subsequently, the energy storage unit 200 is inserted downwards into the housing 100. During the insertion process, the bottom of the energy storage unit 200 first contacts and compresses the retaining strip 150. As the energy storage unit 200 continues to descend until it contacts the height restriction strip 140, the retaining strip 150 is compressed to the same height as the height restriction strip 140. During compression, the adhesive strip 150 undergoes elastic deformation, squeezing the adhesive inside its annular structure. Excess adhesive is forced through the overflow port 152 into the overflow space 131 of the limiting strip 130. Ultimately, the bottom of the energy storage unit 200 contacts the top surface of the height limiting strip 140, and the adhesive is confined within the adhesive application area 151 and spread evenly, preventing it from flowing into the non-adhesive application area 151. If subsequent maintenance requires replacement of the energy storage unit 200, when the energy storage unit 200 is removed from the housing 100, the elastic deformation of the adhesive strip 150 returns to normal, and its height becomes higher than that of the height limiting strip 140 again, preparing for the next adhesive application and assembly.

[0058] The above structural design achieves aerospace-grade high-reliability adhesive application. The pre-compression design of the adhesive barrier strip 150 ensures easy control of the adhesive application amount, the overflow space 131 provides a channel to accommodate excess adhesive, and the height limit strip 140 ensures absolute consistency in adhesive layer thickness. The adhesive application process does not rely on complex automated equipment or skilled workers; it automatically achieves sufficient and uniform adhesive distribution without bubbles or missing adhesive, greatly improving product consistency and reliability. Furthermore, it offers excellent maintainability, ensuring the adhesive application effect even after multiple disassemblies and reassemblies of the battery unit 200, meeting the stringent requirements of aerospace adhesive application processes.

[0059] Preferably, such as Figure 7As shown, each limiting strip 130 has multiple spaced overflow spaces 131, the number of which corresponds to the number of overflow ports 152. This provides multiple independent discharge channels for excess glue. When the energy storage unit 200 compresses the glue-blocking strip 150, the excess glue squeezed out of the glue application area 151 can simultaneously and quickly enter the corresponding multiple overflow spaces 131 through multiple overflow ports 152. Furthermore, the multiple overflow spaces 131 prevent blockages or sudden pressure spikes that might occur if all glue is discharged through a single channel. Each overflow channel is independent, allowing for glue diversion and reducing the pressure on a single overflow space 131, preventing excessive glue pressure from damaging the glue-blocking strip 150 or the limiting strip 130 structure. More importantly, the multiple overflow ports 152 allow glue to overflow simultaneously from multiple directions. Instead of discharging from only one direction, this helps maintain a balanced distribution of adhesive pressure within the coating area 151 during compression, thereby ensuring that the adhesive remaining in the coating area 151 is evenly spread at the bottom of the cell, avoiding problems such as localized missing adhesive or inconsistent adhesive layer thickness. Finally, the one-to-one correspondence between the overflow space 131 and the overflow port 152 ensures that each overflow port 152 has its own dedicated space, preventing the adhesive discharged from one overflow port 152 from interfering with or sharing space with the adhesive discharged from another overflow port 152, thus preventing overflow. This further enhances the controllability and consistency of the coating process, meeting the stringent requirements of aerospace special processes for traceability and predictable results in the coating process.

[0060] See Figure 9, in order to improve the support stability and space utilization rate of the support plate 300, in one embodiment, the support plate 300 is not a flat plate with an integral planar shape, but a structure with a "U" - shaped cross - section in part. Specifically, the support plate 300 includes a support main body 310 and support seats 320. The support main body 310 is a flat plate, and a plurality of support columns 301 with bolt holes are provided on its upper surface. The whole electrical unit 400 is fastened to these support columns 301 by a plurality of screws. There are several support seats 320, and all the support seats 320 are connected to the four - peripheral edges of the support main body 310 at intervals. Each support seat 320 is bent, and it is connected to the energy - storage unit 200 through a fastener 500, so that the support main body 310 and the energy - storage unit 200 are arranged at intervals. In the embodiment shown in the figure, the number of support seats 320 is four, and the four support seats 320 are connected to the four corners of the support main body 310. Each support seat 320 is "L - shaped", and a fixing hole 302 for the fastener 500 to pass through is opened in the horizontally extending part below it, and the vertically extending part above is integrally connected to the support main body 310. This bent structure makes the support main body 310 and the energy - storage unit 200 below arranged at intervals. During assembly, the fastener 500 sequentially passes through the fixing hole 302 on the support seat 320 and the corresponding hole positions on the energy - storage unit 200, and finally is screwed into the threaded blind hole 132 on the bottom wall of the housing 100.

[0061] This design of the support plate 300 with a "U" - shaped cross - section not only forms an electrical gap between the electrical unit 400 and the energy - storage unit 200 through the interval distance between the support main body 310 and the energy - storage unit 200, preventing accidental creepage or short - circuit between the high voltage of the electrical unit 400 and the electrodes of the energy - storage unit 200, but also is beneficial to air circulation to take away the heat generated by the energy - storage unit 200. More importantly, the "U" - shaped structure increases the cross - section height of the support plate 300, and its moment of inertia is significantly greater than that of a flat - plate structure as a whole, making the structural stiffness also significantly greater than that of a flat plate. In addition, the support plate 300 only contacts the energy - storage unit 200 through several support seats 320 instead of the whole surface of the support plate 300 contacting the energy - storage unit 200, which simplifies the assembly accuracy requirements and reduces the processing cost.

[0062] Please continue to refer to Figure 3 , for the structure of the electrical unit 400, the electrical unit 400 includes an electrical component 410 and a control component 420. The electrical component 410 includes high - voltage devices such as relays, fuses, current sensors, etc., which are electrically connected to the positive and negative electrodes of the energy - storage unit 200 through a socket or a wire, and are responsible for the on - off and protection of the power - transmission path in the energy - storage unit 200. The control component 420 is communicatively connected to the electrical component 410 and is electrically connected to the energy - storage unit 200 through the Figure 1 and Figure 4 cable assembly 600 shown in Figure 4 As shown, the cable assembly 600 includes a cable 610 and a bracket 620. The cable 610 is used to collect signals such as voltage and temperature from the energy storage unit 200. The control component 420 executes a control strategy based on the signals collected by the cable 610 to promptly control the circuit's on / off state in case of unexpected situations. Multiple brackets 620 are spaced apart and mounted on the support plate 300. The cable 610 is fixedly connected to these brackets 620 using cable ties or clips to prevent wear or loosening of the cable 610 under vibration.

[0063] In one specific embodiment, the top surface of the support body 310 in the support plate 300 is provided with a plurality of protruding connecting platforms 303 at intervals near the edge. The number of connecting platforms 303 is the same as the number of brackets 620 and corresponds one-to-one. Figure 10 As shown, each bracket 620 includes a body 621 and a connecting part 622 perpendicularly connected to the body 621, forming an overall "L" shape. The body 621 is plate-shaped and is attached to the side of a corresponding connecting platform 303. The connecting part 622 is fixedly attached to the top surface of the corresponding connecting platform 303, for example, by bonding, welding, or using fasteners 500 such as screws. This double-sided contact design creates a stable L-shaped contact between the bracket 620 and the connecting platform 303, significantly improving the bending stiffness of the bracket 620. This effectively solves the problem of insufficient stiffness of the bracket 620 under vibration, which can easily lead to resonance or fatigue fracture, ensuring the reliability of signal transmission.

[0064] Optionally, such as Figure 10 and Figure 11 As shown, each bracket 620 is also provided with at least two cross-connected reinforcing ribs 620a, which further enhances the structural strength of the bracket 620 itself.

[0065] Regarding the structure of the energy storage unit 200, refer to Figure 12 The energy storage unit 200 includes a battery module 210 and an end plate 220. The battery module 210 includes multiple battery cells arranged in a matrix. The end plate 220 has two pieces, which are respectively attached to the battery module 210 along the length direction of the housing 100. Figure 12The end plates 220, located on opposite sides of the housing 100 in the X direction (perpendicular to the height direction of the housing 100), are designed to clamp multiple loose battery cells and facilitate the fixation of the entire battery module 210 to the bottom wall of the housing 100. Mounting holes 221 for the energy storage unit 200 are formed on the end plates 220, extending along the height direction through opposite ends of the end plates 220. Fasteners 500 are detachably inserted through the fixing holes 302 and the mounting holes 221 to connect the support plate 300 and the energy storage unit 200. In the figure, there are four mounting holes 221, corresponding to the number of support seats 320 in the support plate 300. Figure 13 As shown, each end plate 220 has two mounting holes 221. It is understood that the number of mounting holes 221 can be more than that, and is not limited here.

[0066] For a better option, see [link / reference] Figure 1 The energy storage unit 200 also includes an isolation component 230 installed in the battery module 210. The material of the isolation component 230 can be aerogel or the like. The purpose of setting the isolation component 230 is that there is a gap between each two adjacent cells. The isolation component 230 installed in the battery module 210 can isolate the two adjacent cells, so as to block the heat from spreading to other cells when a single cell experiences thermal runaway or other unexpected situations, and avoid the entire battery module 210 from thermal failure due to a chain reaction caused by the failure of a single cell.

[0067] Preferably, in order to more securely clamp the battery module 210, such as Figure 12 As shown, the other two opposite sides of the battery module 210 are respectively attached with side plates 240 integrally connected to the two end plates 220. The two side plates 240 are perpendicular to the two end plates 220. That is, the two side plates 240 are arranged opposite to each other along the width direction of the housing 100 (the Y direction shown in the figure is perpendicular to the length and height directions of the housing 100), so that the two end plates 220 and the two side plates 240 together form a cylindrical structure with a rectangular cross-section. This cylindrical structure clamps the battery module 210 inside itself.

[0068] However, it is worth noting that the battery cell heats up and expands during operation. This expansion force acts on the end plate 220. Because the bottom of the end plate 220 is strongly constrained by the side plate 240 and the bottom wall of the housing 100, while the top constraint is relatively weak, the end plate 220 is prone to tilting deformation (larger displacement at the top and smaller displacement at the bottom, such as...). Figure 5 (As shown by the dotted line in the image). This uneven stress can lead to excessive local pressure on the battery cell, accelerating its aging.

[0069] To address this issue, based on the above embodiments, this application optimizes the design of the side panel 240. Specifically, as follows: Figure 12As shown, each side plate 240 has multiple through holes 241. The distribution, size, or density of these through holes 241 are specially designed so that the stiffness of the side plate 240 gradually decreases from top to bottom along the height direction. For example, as shown in the figure, the multiple strip-shaped through holes 241 on the side plate 240 divide the side plate 240 into multiple spaced parts. From top to bottom along the height direction, the size of each part gradually decreases in the height direction, making the upper part of the side plate 240 more stiff and the lower part less stiff.

[0070] This non-uniform stiffness design of the side plate 240 ensures that the expansion force generated by the cell's heating first pushes the end plate 220. Because the upper part of the side plate 240 has high stiffness and strong resistance to deformation, it limits the displacement of the top of the end plate 220; while the lower part of the side plate 240 has weak stiffness, allowing some displacement at the bottom of the end plate 220. Thus, this design effectively compensates for the tilting deformation of the end plate 220, making the entire end plate 220 move more parallel in the height direction. This allows the expansion force to be more evenly distributed to each cell, ensuring uniform stress across the entire surface of the cell. This significantly improves the cycle life and safety performance of the battery module 210.

[0071] It is understandable that the opening structure of side panel 240 is not limited to Figure 12 The structure shown, for example, each through hole 241 opened on the side plate 240 can be a continuous through hole 241 with the diameter gradually increasing from top to bottom in the height direction, or multiple sets of through holes can be opened, all through hole sets are spaced apart along the length direction, each set of through holes includes multiple through holes 241 spaced apart along the height direction, and the diameter of the multiple through holes 241 in each set of through holes gradually increases from top to bottom in the length direction. All of the above designs can make the stiffness of the side plate 240 gradually decrease from top to bottom along the height direction.

[0072] More preferably, since the aircraft is used in the air most of the time, the overall weight of the aviation battery 10 should not be too heavy. In order to reduce the weight of the aviation battery 10, weight reduction holes can be opened on the end plate 220. At the same time, in order to ensure the strength of the end plate 220, multiple weight reduction holes can be opened. Multiple weight reduction holes are spaced apart along the width direction, so that multiple ribs are formed in the end plate 220 spaced apart along the width direction.

[0073] It should also be noted that for vehicle-mounted batteries, clamps are typically used to hold the opposite sides of the battery cell 200, allowing the battery cell 200 to be placed into or removed from the housing 100. However, in the aviation field, due to the limited internal space and compact installation environment of aircraft, aviation batteries 10 require extremely high integration to meet the aforementioned stringent installation conditions. Therefore, as... Figure 5As shown, there should not be too large a gap between the energy storage unit 200 and the side wall of the housing 100, so that there is not enough space to use the grippers to clamp the energy storage unit 200 to put the energy storage unit 200 into the housing 100 or to take the energy storage unit 200 out of the housing 100.

[0074] To facilitate the placement and removal of the energy storage unit 200 while maintaining the overall compactness of the aviation battery 10, this application also features a special design for the mounting holes 221 on the end plate 220. Specifically, as follows... Figure 14 As shown, the mounting hole 221 is a stepped hole, which includes a threaded hole 221a and a smooth hole 221b connected sequentially from top to bottom along the height direction. The diameter of the threaded hole 221a is larger than the diameter of the smooth hole 221b. For example, the diameter of the threaded hole 221a is 12mm, and the diameter of the smooth hole 221b is 10mm. Figure 15 As shown, when the fastener 500 is a long bolt, after the long bolt is removed from the mounting hole 221, it can supply a device with a... Figure 16 The eye bolt 700 (a bolt with an eye bolt 701 at the top) is inserted and tightened into the mounting hole 221. When the eye bolt 700 is tightened into the mounting hole 221, as shown... Figure 17 As shown, hoisting equipment can be used to hook the lifting ring 701 from above the energy storage unit 200, so that the energy storage unit 200 can be easily picked up and put down when the gap between the side wall of the energy storage unit 200 and the side wall of the housing 100 is very small.

[0075] When assembling the energy storage unit 200 into the housing 100, the assembly steps are as follows:

[0076] First, apply adhesive to the bottom wall of the housing 100, and use eye bolts 700 to pass through the fixing holes 302 on the support plate 300 from above and screw them into the mounting holes 221 on the top of the end plate 220 to temporarily lock the support plate 300 and the energy storage unit 200 into a single assembly.

[0077] Next, the assembly is lifted as a whole by hooking the lifting eye 701 on the lifting eye bolt 700 with the lifting equipment and slowly placed into the housing 100.

[0078] After the assembly is fully inserted into the housing and placed in place, remove the eye bolts 700. At this point, since the fastening position between the end plate 220 and the bottom wall of the housing 100 is pre-drilled, the operator can see the threaded blind hole 132 on the bottom wall of the housing 100 from above through the clear hole 221b and threaded hole 221a (which is now empty) on the end plate 220. Subsequently, replace it with a fastener 500, such as a long bolt. This fastener 500 passes through the fixing hole 302 of the support plate 300, the mounting hole 221 of the energy storage unit 200, and the threaded blind hole 132 inside the housing 100, and is finally fixedly connected to the bottom wall of the housing 100, thereby firmly fixing the support plate 300 and the energy storage unit 200 as a whole inside the housing 100.

[0079] Finally, install and connect the electrical unit 400.

[0080] The above design utilizes the same mounting hole 221 on the end plate 220 to achieve two functions. One function is that the threaded hole 221a of the mounting hole 221 can be used as a lifting force point during assembly. The other function is that after assembly, the mounting hole 221 serves as a channel for permanent fixation. Even if the gap between the energy storage unit 200 and the side wall of the housing 100 is extremely narrow, the energy storage unit 200 can be successfully hoisted and fixed, avoiding problems such as bumps, improper assembly, or low efficiency caused by insufficient operating space.

[0081] In summary, the aviation battery 10 provided in this application achieves a high degree of three-dimensional integration between the electrical unit 400 and the energy storage unit 200 through the support plate 300 and the common fastener 500; it achieves precise control of the aviation-grade adhesive coating process through the cooperation of the height limiting strip 140, the glue blocking strip 150 and the glue overflow space 131; it ensures the reliability of the electrical connection through the two-sided bonding of the bracket 620 and the design of the reinforcing rib 620a; it optimizes the assembly process in a confined space by designing the mounting holes 221 of the end plate 220 as stepped holes; and it solves the problem of uneven stress due to cell expansion through the variable stiffness design of the side plate 240. All these technical features together constitute a highly integrated, highly reliable, easy-to-manufacture and maintain aviation battery 10, which fully meets the stringent requirements of the aviation field.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An aviation storage battery, characterized in that, include: The housing and the energy storage unit, support plate and electrical unit disposed together within the housing; The bottom wall of the housing is provided with at least two spaced limiting strips, and the opposite ends of each limiting strip are respectively connected to the opposite side walls of the housing. At least two spaced height limiting strips with a height lower than the limiting strips are provided between two adjacent limiting strips. The energy storage unit is placed on the height limiting strips and abuts against the two adjacent limiting strips in the length or width direction of the housing. Each limiting strip has an overflow space, and the overflow space is interconnected with the gap formed by each two adjacent height limiting strips. The support plate is located above the energy storage unit along the height direction of the housing, and the support plate and the energy storage unit are connected to each other by a number of fasteners and are jointly fixed to the bottom wall of the housing by the fasteners. The electrical unit is connected to the energy storage unit, and the electrical unit is fixedly mounted on the side surface of the support plate opposite to the energy storage unit.

2. The aviation battery according to claim 1, characterized in that, A baffle strip made of elastic material is provided between each pair of adjacent height limiting strips. The baffle strip forms an adhesive application area between each pair of adjacent height limiting strips. The baffle strip has an overflow outlet, and the adhesive application area is connected to the overflow space through the overflow outlet. When the energy storage unit is not placed in the housing, the height of the sealing strip is higher than the height of the height limit strip; when the energy storage unit is placed in the housing, the energy storage unit compresses the sealing strip to the same height as the height limit strip.

3. The aviation battery according to claim 2, characterized in that, Each of the limiting strips has multiple spaced overflow spaces, and the number of overflow spaces is the same as the number of overflow ports and they are set one-to-one.

4. The aviation battery according to claim 1, characterized in that, The support plate includes a support body and a plurality of support seats spaced apart from the periphery of the support body. Each support seat is bent and connected to the energy storage unit by the fastener, so that the support body and the energy storage unit are spaced apart.

5. The aviation battery according to claim 1, characterized in that, The electrical unit includes an electrical component and a control component. The electrical component is electrically connected to the energy storage unit, and the control component is communicatively connected to the electrical component and electrically connected to the energy storage unit via a cable. The cable is fixedly connected to a plurality of brackets spaced apart on the support plate.

6. The aviation battery according to claim 5, characterized in that, The support plate has multiple spaced connecting platforms that correspond one-to-one with the brackets. Each bracket includes a body and a connecting part that is perpendicularly connected to the body. The body is attached to the side of a corresponding connecting platform, and the connecting part is fixedly attached to the top surface of a corresponding connecting platform. And / or, each bracket is provided with at least two cross-connected reinforcing ribs.

7. The aviation battery according to claim 1, characterized in that, The energy storage unit includes a battery module and two end plates respectively attached to the opposite two sides of the battery module. Each end plate has a mounting hole that extends through its opposite ends along the height direction. The fastener is detachably inserted through the mounting hole.

8. The aviation storage battery according to claim 7, characterized in that, The top surface of the limiting strip is provided with a threaded blind hole, which is coaxially arranged with the mounting hole.

9. The aviation storage battery according to claim 7, characterized in that, The mounting hole includes a threaded hole and a smooth hole that are connected sequentially from top to bottom along the height direction. The diameter of the threaded hole is larger than the diameter of the smooth hole. The threaded hole is configured to allow an eye bolt to be inserted and fastened therein after the fastener is removed from the mounting hole.

10. The aviation storage battery according to claim 7, characterized in that, The battery module also has two side plates that are vertically connected to the two end plates on its other opposite sides. Each side plate has multiple through holes, and all the through holes are configured so that the stiffness of the side plate gradually decreases from top to bottom along the height direction.

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