Battery tray for electric vehicles

Abstract

The present invention discloses a battery tray for an electric vehicle, comprising: a tray body; a cover plate assembly, the cover plate assembly comprising a circumferential cover plate and a middle cover plate, the circumferential cover plate comprising a rectangular ring-shaped protective frame, and the protective frame cover is arranged on the top of the side panel, the inner end of the protective frame is provided with a first extension portion extending downward to the accommodating cavity, a guide cavity is arranged inside the protective frame, and the outer end of the protective frame is provided with a tray pressure relief valve connected with the guide cavity, an expansion component is provided on the inner side of the first extension portion, a expansion cavity is formed between the expansion component and the first extension portion, and a guide pressure relief valve is provided between the expansion cavity and the guide cavity, wherein part of the expansion component is movably arranged so as to be connected with the inner cavity of the protective frame when the air pressure in the expansion cavity reaches a first pressure relief threshold, so as to realize that when the exhaust speed of the tray pressure relief valve is insufficient and the pressure in the guide cavity increases, the air pressure in the guide cavity can be reduced in multiple stages, thereby effectively alleviating the exhaust resistance of the battery cell and increasing the safety performance of the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of battery trays, in particular to a battery tray for electric vehicles. Background Art

[0002] Battery trays, also known as power battery trays, battery boxes, and battery brackets, refer to components that carry and protect power batteries. Battery trays have the advantages of good corrosion resistance, strong load-bearing capacity, and good sealing, and are widely used in the field of new energy vehicles. There are many types of battery trays. According to different materials and production processes, they can be divided into extruded aluminum battery trays, steel battery trays, and die-cast aluminum battery trays.

[0003] The existing battery tray includes a bottom plate and side baffles arranged around the bottom plate, a cavity is arranged inside the side baffle, and the cavity has an air inlet and an air outlet formed on the inner surface of the side baffle, the air outlet is provided with a tray pressure relief valve, the battery cell is provided with a battery cell pressure relief valve, and the battery cell pressure relief valve is connected to the air inlet, and the gas discharged from the battery cell pressure relief valve directly enters the cavity and is depressurized through the tray pressure relief valve when the air pressure inside the cavity reaches a set value. However, the above battery tray has the following problems:

[0004] 1. Opening an exhaust cavity and multiple air inlets and outlets on the side baffle of the battery tray will reduce the structural strength of the battery tray and increase the risk of damage to the battery tray;

[0005] 2. When a large number of battery cells fail in succession, the tray pressure relief valve is limited by its own pressure relief capacity, making it difficult to quickly reduce the pressure inside the exhaust chamber, resulting in increased exhaust resistance of the battery cells. Summary of the invention

[0006] The object of the present invention is to provide a battery tray for an electric vehicle to solve the problems raised in the above background technology.

[0007] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention is a battery tray for electric vehicles, comprising:

[0009] The tray body comprises a bottom plate and side panels arranged around the bottom plate, wherein the bottom plate and the side panels are arranged to form a receiving cavity for receiving the battery cell assembly;

[0010] A cover plate assembly, the cover plate assembly includes a circumferential cover plate and a middle cover plate, the circumferential cover plate includes a rectangular ring-shaped protective frame and the protective frame cover is arranged on the top of the side panel, the middle cover plate cover is arranged on the top of the protective frame, the inner end of the protective frame is provided with a first extension portion extending downward to the accommodating cavity, a guide cavity is provided inside the protective frame, and a bottom surface of the first extension portion is provided with a plurality of first air inlets all connected with the guide cavity, the plurality of first air inlets are used to dock with a plurality of battery cell pressure relief valves located on the top of the battery cell assembly one by one, the outer end of the protective frame is provided with a tray pressure relief valve connected with the guide cavity, the inner side of the first extension portion is provided with a capacity expansion component, a capacity expansion cavity is formed between the capacity expansion component and the first extension portion, a drainage pressure relief valve is provided between the capacity expansion cavity and the guide cavity, wherein a part of the capacity expansion component is movably arranged so that when the air pressure of the capacity expansion cavity reaches a first pressure relief threshold, it is connected with the inner cavity of the protective frame, and the pressure relief threshold of the drainage pressure relief valve is between the first pressure relief threshold and the pressure relief threshold of the tray pressure relief valve.

[0011] Furthermore, an annular lap plate is provided on the inner side wall of the first extension portion, and the capacity expansion assembly includes a rectangular annular square plate and a first elastic seal. The square annular plate is arranged on the inner side of the first extension portion and is movable along the height direction of the tray body. The square annular plate includes a horizontal plate section and a vertical plate section arranged at the bottom of the horizontal plate section. One end of the horizontal plate section is overlapped on the top of the lap plate. The first elastic seal is connected to the vertical plate section and the bottom of the first extension portion. The first elastic seal is provided with a plurality of diversion holes corresponding to the plurality of first air inlets one by one, wherein the drainage pressure relief valve is arranged on the first extension portion.

[0012] Furthermore, it also includes an extrusion component, which is arranged in the inner cavity of the protective frame, and includes a positioning plate and an elastic pressure component arranged on the outer periphery of the positioning plate, one end of the elastic pressure component is pressed and matched with the top of the horizontal plate section, wherein when the middle cover plate is covered on the protective frame, the middle cover plate and the positioning plate are abutted and matched, so that the elastic pressure component applies an elastic force toward the accommodating cavity to the moment ring plate.

[0013] Furthermore, the elastic pressure assembly includes four elastic pressure frames, two of which are respectively located on both sides of the positioning plate along the length direction of the tray body, and the other two elastic pressure frames are respectively located on both sides of the positioning plate along the width direction of the tray body, and one end of the elastic pressure frame connected to the positioning plate is higher than the other end.

[0014] Furthermore, a recessed hole rod is provided through the middle of the positioning plate, and the top of the recessed hole rod is abutted against the middle cover plate, the recessed hole rod has a mounting hole, a rubber rod is fixedly connected in the mounting hole and the bottom of the rubber rod extends out of the mounting hole, and a through-hole extrusion plate is fixedly connected to the bottom of the rubber rod, and the through-hole extrusion plate is used to contact the top of the battery assembly.

[0015] In some embodiments of the present application, a second extension portion extending downward is provided at the outer end of the protective frame, the second extension portion is located at the outer side of the side panel, the second extension portion is screwed with a screw, the side panel is provided with a threaded connection hole, the screw is screwed into the screw threaded connection hole, and a limiting component is provided on the outer side of the side panel, the limiting component includes a support plate, the end of the support plate is fixedly connected to the outer side surface of the side panel, the top of the support plate is fixedly connected to a triangular plate, the side of the triangular plate close to the side panel is fixedly connected to a skateboard, a groove is provided at the top of the skateboard, a lifting frame is slidably connected to the side of the skateboard close to the side panel, the end of the lifting frame away from the skateboard is fixedly connected to the contact frame, the inner wall of the groove is rotatably connected to the pressure frame, the top of the pressure frame is fixedly connected to a spring clip, and the end of the spring clip away from the pressure frame is fixedly connected to the side of the skateboard away from the tray body.

[0016] Furthermore, a connecting plate is fixedly connected to the end of the pallet body, and a fixed plate is fixedly connected to the end of the connecting plate away from the pallet body. A bottom supporting component is provided at the bottom of the pallet body, and the bottom supporting component includes a bent plate, and the end of the bent plate is fixedly connected to the surface of the connecting plate, and a cylindrical rod is fixedly connected to the end of the bent plate away from the connecting plate, and a sieve plate is fixedly connected to the end of the cylindrical rod away from the bent plate, and a stabilizing rod is fixedly connected to the surface of the bent plate, and a compression rod is fixedly connected to the surface of the stabilizing rod.

[0017] Furthermore, one end of the bending plate away from the connecting plate extends to the bottom of the tray body, the top of the sieve plate contacts the bottom of the battery tray of the tray body, the stabilizing rod is symmetrically arranged around the bending plate, and there are two compression rods, which are symmetrically arranged around the bending plate.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention avoids providing a guide cavity and a plurality of air inlets and outlets on the tray body by arranging the guide cavity on the cover plate assembly, thereby ensuring the structural strength of the tray body and improving the safety performance of the battery tray. At the same time, a capacity expansion cavity is formed on the inner side of the protective frame, and a drainage pressure relief valve is provided between the capacity expansion cavity and the guide cavity. Part of the capacity expansion assembly is movably arranged so that the capacity expansion cavity is connected with the accommodating cavity when the air pressure exceeds the pressure relief threshold of the tray pressure relief valve. The pressure relief threshold of the drainage pressure relief valve is between the first pressure relief threshold and the pressure relief threshold of the tray pressure relief valve. In this way, not only the capacity expansion cavity and the guide cavity are connected to reduce the pressure in the guide cavity when the exhaust speed of the tray pressure relief valve is insufficient and the pressure in the guide cavity is relatively large, but also part of the gas in the capacity expansion cavity can be drained into the inner cavity of the protective frame when the internal pressure of the guide cavity continues to expand, and the pressure in the guide cavity is reduced again, thereby realizing that when the exhaust speed of the tray pressure relief valve is insufficient and the pressure in the guide cavity increases, the air pressure in the guide cavity can be reduced in multiple stages, effectively alleviating the exhaust resistance of the battery cell and improving the safety performance of the battery pack.

[0020] 2. After the screw is fixed, the lifting frame is placed on the surface of the slide plate and pushed to move downward. When the bottom of the lifting frame contacts the top of the support plate, the inner wall of the contact frame contacts the surface of the screw. The contact frame is used to limit the screw to prevent the screw from loosening and sliding after being vibrated. The pressure frame squeezes the top of the lifting frame through the elasticity of the spring sheet to improve the stability of the lifting frame when limiting the contact frame.

[0021] 3. When the protective frame of the present invention is fixed on the top of the battery tray, the fixing frame will limit the positioning plate. At this time, the bottom of the through-hole extrusion plate will contact the top of the battery and squeeze and fix the battery, further improving the stability of the battery inside the battery tray. The sieve plate is fixed to the bottom of the battery tray by connecting the cylindrical rod and the curved plate. The sieve plate is used to protect the bottom of the battery tray to avoid the cross stuck at the bottom of the battery tray when the car is driving. The stabilizing bar and the anti-compression bar cooperate with each other to protect the battery tray and improve the pressure resistance of the battery tray.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the battery tray structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall structure of the extruded component of the present invention;

[0027] Figure 4 For the present invention Figure 3 A magnified schematic diagram of part A in FIG.

[0028] Figure 5 It is a schematic diagram of the overall structure of the limiting component of the present invention;

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] In the figure: 1. tray body; 2. connecting plate; 3. fixing plate; 4. circumferential cover plate; 5. extrusion component; 6. limiting component; 7. bottom supporting component; 10. Protective frame; 101. First extension part; 102. Second extension part; 103. Guide cavity; 104. Overlap plate; 105. First air inlet; 106. Expansion cavity; 11. Screw; 12. Bottom plate; 13. Rectangular ring plate; 131. Horizontal plate section; 132. Vertical plate section; 14. Side panel; 20. Support plate; 21. Triangular plate; 22. Slide plate; 23. Shrapnel; 24. Groove; 25. Pressure frame; 26. Lifting frame; 27. Contact frame; 30. First elastic pressure frame; 31. Second elastic pressure frame; 32. Positioning plate; 33. Concave hole rod; 34. Rubber rod; 35. Through hole extrusion plate; 40. Bending plate; 41. Cylindrical rod; 42. Sieve plate; 43. Stabilizing rod; 44. Anti-pressure rod. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 5As shown, the present invention is a battery tray for electric vehicles, including a tray body 1 and a cover plate assembly. The tray body 1 is in the shape of a rectangular parallelepiped and includes a bottom plate 12 and side panels 14 arranged around the bottom plate 12. The bottom plate 12 and the side panels 14 are arranged to form a receiving cavity for receiving the battery cell assembly. A connecting plate 2 is fixedly connected to the end of the tray body 1, and a fixing plate 3 is fixedly connected to the end of the connecting plate 2 away from the tray body 1. The battery tray is fixedly connected to the vehicle body through the fixing plate 3. A cover plate assembly is arranged above the tray body 1, and the cover plate assembly includes a circumferential cover plate 4 and a middle cover plate. The circumferential cover plate 4 includes a protective frame 10 in the shape of a rectangular ring. The protective frame 10 is covered on the top of the side panels 14 and is fixedly connected to the side panels 14. In order to improve the sealing performance, a sealing gasket can be provided between the protective frame 10 and the side panels 14. The middle cover plate is arranged on the top of the protective frame 10. The middle cover plate can be a liquid cooling plate, etc. The middle cover plate and the protective frame 10 are fixedly connected and a sealing gasket can also be arranged between the two. The inner end of the protective frame 10 is provided with a first extension portion 101 extending downward to the accommodating cavity. The protective frame 10 is provided with a flow guide cavity 103 inside and the bottom surface of the first extension portion 101 is provided with a plurality of first air inlets 105 all connected with the flow guide cavity 103. The plurality of first air inlets 105 are used to dock with a plurality of battery cell pressure relief valves located at the top of the battery cell assembly one by one. The outer end of the protective frame 10 is provided with a tray pressure relief valve connected with the flow guide cavity 103. The gas discharged from the battery cell pressure relief valve can flow into the flow guide cavity 103 through the corresponding first air inlet 105 and exhaust and relieve pressure through the tray pressure relief valve when the internal pressure of the flow guide cavity 103 reaches a certain pressure value. The battery assembly includes a plurality of battery cells and a battery cell pressure relief valve is provided on the top of each battery cell. The battery cell can be, but is not limited to, a strip-shaped blade battery, etc. When a battery assembly is installed in the accommodating cavity, the first extension portion 101 is located above the battery assembly and the plurality of first air inlets 105 are connected one by one with the plurality of battery cell pressure relief valves of the battery cell assembly. By arranging the flow guiding cavity 103 in the cover plate assembly, it is avoided to arrange the flow guiding cavity 103 and the plurality of air inlets and outlets on the tray body 1, thereby ensuring the structural strength of the tray body 1 and improving the safety performance of the battery tray.

[0033] A capacity expansion component is provided inside the first extension portion 101, and a capacity expansion chamber 106 is formed between the capacity expansion component and the first extension portion 101. A drainage pressure relief valve is provided between the capacity expansion chamber 106 and the diversion chamber 103, and the diversion pressure relief valve is used to realize the connection and disconnection between the capacity expansion chamber 106 and the diversion chamber 103. Part of the capacity expansion component is movably arranged so that when the air pressure of the capacity expansion chamber 106 reaches a first pressure relief threshold, it is connected to the inner cavity of the protective frame 10, and the pressure relief threshold of the drainage pressure relief valve is between the first pressure relief threshold and the pressure relief threshold of the tray pressure relief valve.

[0034] When there are a large number of cells with structural failures in the cell assembly, a large amount of gas will be quickly discharged into the diversion cavity 103, causing the pressure to rise rapidly. When the pressure value in the diversion cavity 103 reaches the pressure relief threshold of the tray pressure relief valve, the tray pressure relief valve will exhaust and relieve pressure. Since the exhaust capacity of the tray pressure relief valve is fixed and limited, the pressure in the diversion cavity 103 will increase when the tray pressure relief valve is open. At this time, the pressure in the diversion cavity 103 is too high, which not only increases the risk of deformation of the circumferential cover, but also increases the exhaust resistance of the faulty cell, which may aggravate the expansion of the cell. When the pressure in the diversion cavity 103 reaches the pressure relief threshold of the diversion pressure relief valve, the diversion pressure valve is triggered and connects the diversion cavity 103 and the capacity expansion cavity 106, expanding the volume of the cavity that accommodates the gas discharged by the cell, reducing the pressure in the diversion cavity 103 at this time, and reducing the exhaust resistance of the faulty cell. Since the volume of the capacity expansion chamber 106 is limited, if the pressure in the guide chamber 103 continues to rise to a higher pressure value during the subsequent period of connecting the capacity expansion chamber 106, it means that a large number of battery cells of the battery assembly are damaged at this time. When the pressure of the guide chamber 103 reaches the first pressure relief threshold, the capacity expansion assembly moves under the action of the internal pressure of the capacity expansion chamber 106 to connect the capacity expansion chamber 106 and the inner cavity of the protective frame 10, thereby further expanding the cavity volume to reduce the pressure in the guide chamber 103 again. In this way, when the exhaust speed of the tray pressure relief valve is insufficient and the pressure in the guide chamber 103 increases, the air pressure in the guide chamber 103 can be reduced in multiple stages, thereby effectively alleviating the exhaust resistance of the battery cells, extending the owner's avoidance opportunity, and increasing the safety performance of the battery pack.

[0035] Among them, the pressure relief threshold of the drainage pressure relief valve may be 1.1-1.2 times of the tray pressure relief threshold, and the first pressure relief threshold may be 1.2-1.3 times of the tray pressure relief threshold.

[0036] In some embodiments of the present application, the inner side wall of the first extension part 101 is provided with a rectangular ring-shaped lap plate 104, and the capacity expansion assembly includes a rectangular ring-shaped square plate 13 and a first elastic seal. The square ring plate 13 is arranged on the inner side of the first extension part 101 and is movable along the height direction of the tray body 1. The square ring plate 13 includes a horizontal plate section 131 and a vertical plate section 132 arranged at the bottom of the horizontal plate section 131. One end of the horizontal plate section 131 overlaps the top of the lap plate 104. The first elastic seal is connected to the vertical plate section 132 and the bottom of the first extension part 101. The first elastic seal is provided with a plurality of diversion holes corresponding to the plurality of first air inlets 105, wherein the diversion pressure relief valve is arranged on the first extension part 101. When the battery assembly is installed in the accommodating cavity, the first elastic seal contacts the top of the battery assembly and is squeezed between the vertical plate section 132 and the battery assembly. The first elastic seal can elastically limit the battery assembly to reduce the friction damage caused by the vibration of the battery assembly. At the same time, the first elastic seal can also seal the multiple first air inlets 105 to prevent the exhaust gas of the battery cells from leaking from here. The first elastic seal can be, but is not limited to, a high-temperature resistant rubber sealing pad, etc., which can be bonded and fixedly connected to the vertical plate section 132 and the first extension portion 101. When the internal pressure of the capacity expansion chamber 106 reaches the first pressure relief threshold, the moment ring plate 13 moves upward under the action of pressure, so that an exhaust gap is formed between the lap plate 104 and the horizontal plate section 131, and the gas is discharged to the inner cavity of the protective frame 10 through the exhaust gap.

[0037] Among them, the inner cavity of the protective frame 10 is connected with the accommodating cavity and is located above the battery assembly. Although the gas discharged from the exhaust gap is high-temperature gas, it does not directly pass through the battery assembly during the flow process, and the rectangular ring plate 13 forms a sealing enclosure on the top of the battery assembly, so that its impact on the battery assembly is smaller and the impact speed is slower.

[0038] In order to improve the sealing performance between the horizontal plate section 131 and the lap plate 104 , a high temperature resistant sealing gasket may be provided between the two, and the sealing gasket is bonded to the horizontal plate section 131 or the lap plate 104 .

[0039] In some embodiments of the present application, an extrusion component 5 is also included. The extrusion component 5 is arranged in the inner cavity of the protective frame 10, and includes a positioning plate 32 and an elastic pressing component arranged on the outer periphery of the positioning plate 32. One end of the elastic pressing component is pressed against the top of the horizontal plate section 131. When the middle cover plate is covered on the protective frame 10, the middle cover plate and the positioning plate 32 are in contact with each other, so that the elastic pressing component applies an elastic force toward the accommodating cavity to the moment ring plate 13. The above-mentioned extrusion component 5 can elastically press the moment ring plate 13, close the exhaust gap when the pressure in the volume increase cavity 106 is less than the first pressure relief threshold, and open the exhaust gap when the pressure reaches the first pressure relief threshold. The size of the exhaust gap is positively correlated with the internal pressure, so as to control the amount of gas discharged into the inner cavity of the protective frame 10.

[0040] The elastic pressure assembly includes four elastic pressure racks, two of which are first elastic pressure racks 30 and the two first elastic pressure racks 30 are respectively located on both sides of the positioning plate 32 along the length direction of the tray body 1, and the other two elastic pressure racks are second elastic pressure racks 31 and the two second elastic pressure racks 31 are respectively located on both sides of the positioning plate 32 along the width direction of the tray body 1, and one end of the elastic pressure rack connected to the positioning plate 32 is higher than the other end. The ends of the above four elastic pressure racks are all provided with pressure rods and are in pressure contact with the top of the horizontal plate section 131 through the pressure rods. A recessed hole rod 33 is provided through the middle of the positioning plate 32, and both ends of the recessed hole rod 33 extend out of the positioning plate 32. The top of the recessed hole rod 33 is in abutment with the middle cover plate. The concave hole rod 33 has a mounting hole, a rubber rod 34 is fixedly connected in the mounting hole and the bottom of the rubber rod 34 extends out of the mounting hole, and a through-hole extrusion plate 35 is fixedly connected to the bottom of the rubber rod 34, and the through-hole extrusion plate 35 is used to contact the top of the battery assembly to achieve elastic limiting of the battery assembly. There is a spacing between the horizontal plate section 131 and the first extension portion 101, and a guide rod assembly is provided between the horizontal plate section 131 and the lap plate 104 to ensure the moving direction of the moment ring plate 13. The guide rod assembly includes a guide rod and a guide hole, which are respectively located on the horizontal plate section 131 and the lap plate 104.

[0041] In some embodiments of the present application, a second extension portion 102 extending downward is provided at the outer end of the protective frame 10, the second extension portion 102 is located on the outer side of the side panel 14, the second extension portion 102 is screwed with a screw 11, the side panel 14 is provided with a threaded connection hole, and the screw 11 is screwed into the threaded connection hole. A limiting component 6 is provided on the outer side of the side panel 14, and the limiting component 6 includes a supporting plate 20, the end of the supporting plate 20 is fixedly connected to the outer side surface of the side panel 14, the top of the supporting plate 20 is fixedly connected to a triangular plate 21, the side of the triangular plate 21 near the side panel 14 is fixedly connected to a slide plate 22, a groove 24 is provided on the top of the slide plate 22, a lifting frame 26 is slidably connected to the side of the slide plate 22 close to the side panel 14, the end of the lifting frame 26 away from the slide plate 22 is fixedly connected to a contact frame 27, the inner wall of the groove 24 is rotatably connected to a pressure frame 25, the top of the pressure frame 25 is fixedly connected to a spring plate 23, and the end of the spring plate 23 away from the pressure frame 25 is fixedly connected to the side of the slide plate 22 away from the pallet body 1.

[0042] The end of the pressure frame 25 extends to the outer end of the groove 24, the triangular plate 21 is located at the end of the support plate 20 away from the tray body 1, and the bottom of the lifting frame 26 contacts the bottom of the support plate 20. After the screw 11 is fixed to the present invention, the lifting frame 26 is placed on the surface of the slide plate 22 and the lifting frame 26 is pushed to move downward. When the bottom of the lifting frame 26 contacts the top of the support plate 20, the inner wall of the contact frame 27 contacts the surface of the screw 11, and the contact frame 27 is used to limit the screw 11 to prevent the screw 11 from loosening and sliding after being vibrated. The pressure frame 25 will squeeze the top of the lifting frame 26 through the elasticity of the spring sheet 23 to improve the stability of the lifting frame 26 when limiting the contact frame 27. The bottom of the pressure frame 25 contacts the top of the lifting frame 26, the inner wall of the contact frame 27 contacts the surface of the screw 11, and the end of the lifting frame 26 away from the contact frame 27 contacts the surface of the triangular plate 21.

[0043] In some embodiments of the present application, a bottom supporting component 7 is provided at the bottom of the tray body 1, and the bottom supporting component 7 includes a bent plate 40, the end of the bent plate 40 is fixedly connected to the surface of the connecting plate 2, the end of the bent plate 40 away from the connecting plate 2 is fixedly connected to a cylindrical rod 41, the end of the cylindrical rod 41 away from the bent plate 40 is fixedly connected to a sieve plate 42, the surface of the bent plate 40 is fixedly connected to a stabilizing rod 43, and the surface of the stabilizing rod 43 is fixedly connected to a compression-resistant rod 44.

[0044] The end of the bent plate 40 away from the connecting plate 2 extends to the bottom of the pallet body 1. The sieve plate 42 is fixed to the bottom of the pallet body 1 by connecting the bent plate 40 with the cylindrical rod 41. The sieve plate 42 is used to protect the bottom of the pallet body 1 to prevent the cross from being stuck at the bottom of the pallet body 1 when the car is driving. At the same time, the sieve plate 42 can assist the pallet body 1 in dissipating heat for the battery assembly. The stabilizing bar 43 and the compression bar 44 cooperate with each other to protect the pallet body 1 and improve the pressure resistance of the pallet body 1. The top of the sieve plate 42 contacts the bottom of the pallet body 1. The stabilizing bar 43 is symmetrically arranged with the bent plate 40 as the center. There are two compression bars 44, and the two compression bars 44 are symmetrically arranged with the bent plate 40 as the center.

[0045] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A battery tray for electric vehicles, characterized in that: include: The tray body comprises a bottom plate and side panels arranged around the bottom plate, wherein the bottom plate and the side panels surround a receiving cavity for receiving the battery cell assembly; A cover plate assembly, the cover plate assembly includes a circumferential cover plate and a middle cover plate, the circumferential cover plate includes a rectangular ring-shaped protective frame and the protective frame cover is arranged on the top of the side panel, the middle cover plate cover is arranged on the top of the protective frame, the inner end of the protective frame is provided with a first extension portion extending downward to the accommodating cavity, the protective frame is provided with a guide cavity inside and the bottom surface of the first extension portion is provided with a plurality of first air inlets all connected to the guide cavity, the plurality of first air inlets are used to communicate with a plurality of battery cell pressure relief valves located on the top of the battery cell assembly A tray pressure relief valve connected to the diversion cavity is provided at the outer end of the protection frame, a capacity expansion component is provided on the inner side of the first extension portion, a capacity expansion cavity is formed between the capacity expansion component and the first extension portion, a drainage pressure relief valve is provided between the capacity expansion cavity and the diversion cavity, wherein a portion of the capacity expansion component is movably arranged so as to be connected to the inner cavity of the protection frame when the air pressure of the capacity expansion cavity reaches a first pressure relief threshold, and a pressure relief threshold of the drainage pressure relief valve is between the first pressure relief threshold and the pressure relief threshold of the tray pressure relief valve; The inner side wall of the first extension portion is provided with an annular lap plate, the capacity expansion assembly includes a rectangular annular square plate and a first elastic seal, the square annular plate is arranged on the inner side of the first extension portion and is movable along the height direction of the tray body, the square annular plate includes a horizontal plate segment and a vertical plate segment arranged at the bottom of the horizontal plate segment, one end of the horizontal plate segment is overlapped on the top of the lap plate, the first elastic seal is connected to the vertical plate segment and the bottom of the first extension portion, the first elastic seal is provided with a plurality of diversion holes corresponding to the plurality of first air inlets one by one, wherein the drainage pressure relief valve is arranged on the first extension portion; It also includes an extrusion component, which is arranged in the inner cavity of the protective frame, and includes a positioning plate and an elastic pressing component arranged on the outer periphery of the positioning plate, one end of the elastic pressing component is pressed and matched with the top of the horizontal plate segment, wherein when the middle cover plate is covered on the protective frame, the middle cover plate is abutted and matched with the positioning plate, so that the elastic pressing component applies an elastic force toward the accommodating cavity to the moment ring plate; The elastic pressing assembly includes four elastic pressing frames, two of which are respectively located on both sides of the positioning plate along the length direction of the tray body, and the other two elastic pressing frames are respectively located on both sides of the positioning plate along the width direction of the tray body, and one end of the elastic pressing frame connected to the positioning plate is higher than the other end; A recessed hole rod is provided through the middle of the positioning plate, and the top of the recessed hole rod is abutted against the middle cover plate, the recessed hole rod has a mounting hole, a rubber rod is fixedly connected in the mounting hole and the bottom of the rubber rod extends out of the mounting hole, and a through-hole extrusion plate is fixedly connected to the bottom of the rubber rod, and the through-hole extrusion plate is used to contact the top of the battery assembly.

2. A battery tray for electric vehicles according to claim 1, characterized in that: A connecting plate is fixedly connected to the end of the pallet body, and a fixing plate is fixedly connected to the end of the connecting plate away from the pallet body. A bottom supporting component is provided at the bottom of the pallet body, and the bottom supporting component includes a bent plate, and the end of the bent plate is fixedly connected to the surface of the connecting plate, and a cylindrical rod is fixedly connected to the end of the bent plate away from the connecting plate, and a sieve plate is fixedly connected to the end of the cylindrical rod away from the bent plate, a stabilizing rod is fixedly connected to the surface of the bent plate, and a compression rod is fixedly connected to the surface of the stabilizing rod.

3. A battery tray for electric vehicles according to claim 2, characterized in that: One end of the bending plate away from the connecting plate extends to the bottom of the tray body, the top of the sieve plate contacts the bottom of the tray body, the stabilizing rod is symmetrically arranged with the bending plate as the center, and the number of the anti-compression rods is two, and the two anti-compression rods are symmetrically arranged with the bending plate as the center.

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