Replaceable battery protection chassis for new energy automobile

Abstract

The invention relates to the technical field of new energy vehicles, in particular to a replaceable battery protection chassis for a new energy vehicle, which comprises a chassis frame, a protective cover plate is arranged in the middle of the chassis frame, and the protective cover plate is of a hollow structure with an opening in the upper part; a heat exchange partition plate is arranged between the upper side of the buffer layer and the battery pack body; the buffer piece is bonded and fixed in a groove in the lower side of the buffer layer, and the lower surface of the buffer piece protrudes downwards to the lower part of the buffer layer; an internal thread is arranged on the inner wall of the lower side of the stepped through hole, and the internal thread is matched with the external thread; the device has the beneficial effects that the buffer layer is arranged at the bottom of the protective cover plate, the buffer layer is in a wave shape, the buffer piece is installed in the groove in the lower side of the buffer layer, the lower surface of the buffer piece protrudes to the position below the buffer layer, the buffer piece can block most stones and stones, the impact force generated by the stones and the stones on the buffer layer is reduced, and the service life of the stones and the stones is prolonged. And in cooperation with the wavy structure of the buffer layer, the impact force is further weakened.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and specifically to a replaceable battery protection chassis for new energy vehicles. Background Technique

[0002] The installation method of the power battery pack of new energy vehicles on the whole vehicle is to hoist it on the vehicle chassis. After the battery pack is installed, in order to prevent the battery pack from directly colliding with foreign objects when the vehicle floor collides with foreign objects on the ground and causing damage to the battery pack, a protective structure for protection needs to be installed outside the battery pack.

[0003] In the prior art, Chinese Utility Model with publication number CN219214739U discloses a composite structure of a new energy vehicle chassis and a battery pack, realizing that the upper cover and the lower cover can be quickly disassembled.

[0004] However, at present, the traditional chassis cover structure is relatively simple and only relies on its own strength to protect the battery pack. For complex roads with many pebbles and stones, it is difficult for the vehicle chassis cover to have a good buffering effect on the bounced pebbles and stones, and the protection effect on the battery pack is relatively limited during the long-term driving of the vehicle. Therefore, the present invention proposes a replaceable battery protection chassis for new energy vehicles to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a replaceable battery protection chassis for new energy vehicles to solve the problems of the simple structure of the traditional chassis cover and the limited protection effect on the battery pack proposed in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A replaceable battery protection chassis for new energy vehicles, comprising:

[0007] A chassis frame, a protective cover is arranged in the middle of the chassis frame. The protective cover has a hollow structure with an opening at the upper part, and a battery pack body is arranged in the inner cavity of the protective cover;

[0008] A buffer layer is arranged at the bottom of the protective cover, and the cross-section of the buffer layer is wavy. A heat exchange partition is arranged between the upper side of the buffer layer and the battery pack body, and a cooling pipe is arranged in the upper groove of the protective cover;

[0009] A buffer member is adhesively fixed in the lower groove of the buffer layer, and the lower surface of the buffer member protrudes downward below the buffer layer. The buffer member includes two upper and lower layers, namely a rubber layer and a metal layer. A stepped through hole is formed through the middle of the buffer member, and a buffer is arranged in the inner cavity of the stepped through hole. The upper end of the buffer is fixedly connected to the buffer layer;

[0010] The buffer includes an outer cylinder and an inner cylinder movably inserted into the inner cavity of the outer cylinder. A thrust spring is disposed inside the outer cylinder. The outer sidewall of the outer cylinder is provided with an external thread, and the lower inner wall of the stepped through hole is provided with an internal thread that is adapted to the external thread.

[0011] Preferably, the lower end of the outer cylinder is provided with a boss, and the boss is frustum-shaped. A polygonal slot is formed in the middle of the boss, and an oil injection hole communicating with the inner cavity of the outer cylinder is formed at the bottom of the polygonal slot. A one-way valve is installed in the inner cavity of the oil injection hole. The inner cavity of the outer cylinder is filled with hydraulic oil, which can facilitate the fixed connection between the outer cylinder and the metal layer.

[0012] Preferably, the inner part of the inner cylinder is hollow, and an opening is provided at one end located in the inner cavity of the outer cylinder. A sealing ring that is hermetically fitted to the inner wall of the outer cylinder is fixedly sleeved on the outer side of one end of the inner cylinder. A sealing plate is fixed in the inner cavity of the opening end of the inner cylinder, and damping holes are formed through the surface of the sealing plate, ensuring that the overall expansion and contraction of the buffer has a damping effect and can buffer and damp the impact received by the metal layer.

[0013] Preferably, an annular platform concentric with it is fixed on the side surface of the sealing ring. One end of the thrust spring abuts against the side surface of the sealing ring and is sleeved outside the annular platform. A sealing ring is movably sleeved on the outer side of the inner cylinder, and the sealing ring and the opening end of the outer cylinder are fixedly connected by bolts, thereby preventing the inner cylinder and the outer cylinder from separating from each other.

[0014] Preferably, strip-shaped bases are fixed on both side surfaces of the protective cover plate. Suspension shaft rods parallel to the strip-shaped bases are provided on the outer sides of the strip-shaped bases. The suspension shaft rods and the strip-shaped bases are movably connected by connecting arms. A plurality of connecting arms are provided and are equally spaced along the length direction of the strip-shaped base, realizing the suspension installation of the entire protective cover plate and the battery pack body.

[0015] Preferably, avoiding grooves are formed on both inner sidewalls of the chassis frame to form suspension hooks. The side surfaces of the suspension hooks are attached to the outer sidewalls of the protective cover plate. The suspension shaft rods penetrate into the inner cavities of the avoiding grooves from bottom to top, and the suspension shaft rods are stuck inside the suspension hooks after rotating close to the protective cover plate. The suspension shaft rods are suspended on the suspension hooks by gravity. Mudguards corresponding to a plurality of connecting arms are formed on the side surfaces of the suspension hooks. Therefore, the suspension shaft rods can be suspended inside the suspension hooks under the action of the gravity of the protective cover plate.

[0016] Preferably, a recessed groove corresponding to the strip-shaped base is formed on the lower side of the suspension hook. A tightening bolt is threaded through the middle of the strip-shaped base. The upper end of the tightening bolt abuts against the bottom of the recessed groove on the lower side of the suspension hook. A mudguard is fixedly connected to the lower opening end of the avoiding groove by bolts, which can prevent the protective cover plate from shaking and displacing.

[0017] Preferably, the length and width of the buffer layer are respectively smaller than the inner length and width of the protective cover plate. The cooling pipes are distributed in an "S" shape in the inner cavity of the protective cover plate. The diameter of the cooling pipes is smaller than the depth of the upper-side groove of the buffer layer, and a flexible layer is padded under the lower side of the cooling pipes. The heat exchange partition plate is placed on the upper side of the buffer layer and there is a gap between the heat exchange partition plate and the cooling pipes, realizing heat exchange and temperature reduction of the battery pack body.

[0018] Preferably, the heat exchange partition plate divides the inner cavity of the protective cover plate into two independent upper and lower layers. A positioning frame adapted to the battery pack body is fixed on the upper surface of the heat exchange partition plate, which can prevent the battery pack body from shaking.

[0019] Preferably, an arc-shaped heat exchange plate located in the upper-side groove of the buffer layer is arranged below the heat exchange partition plate, and the arc-shaped heat exchange plate semi-surrounds the outside of the cooling pipes. A plurality of heat exchange fins are fixed along the length direction of the outside of the arc-shaped heat exchange plate at equal intervals, and the heat exchange fins are fixed on the lower surface of the heat exchange partition plate. The heat exchange fins are stuck in the upper-side groove of the buffer layer and are adapted to it, which can further improve the cooling and heat exchange effect on the battery pack body.

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

[0021] In the present invention, a buffer layer is arranged at the bottom of the protective cover plate. The buffer layer is wavy. The cooling pipes are arranged in the upper-side inner cavity of the buffer layer, which can reduce the occupation of space and avoid the overall vertical thickness of the protective cover plate from being too large. A buffer member is installed in the lower-side groove of the buffer layer, and the lower surface of the buffer member protrudes below the buffer layer. A buffer is installed inside the buffer member, and the upper end of the buffer is fixedly connected to the buffer layer. The distance between adjacent two buffer members is small. When stones and rocks bounce up during the driving of the vehicle, the buffer member can block and buffer most of the stones and rocks, greatly reducing the impact force generated on the buffer layer. Coupled with the wavy structure of the buffer layer, the impact force is further weakened, improving the protection effect on the battery pack body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is an exploded schematic diagram of the overall structure of the present invention;

[0024] Figure 3 is an exploded schematic diagram of the heat exchange partition plate and the protective cover plate structure of the present invention;

[0025] Figure 4 is a three-dimensional schematic diagram of the protective cover plate structure of the present invention;

[0026] Figure 5 is a cross-sectional schematic diagram of the overall structure of the present invention;

[0027] Figure 6 Schematic diagram of a partial cross-section of the chassis frame structure of the present invention;

[0028] Figure 7 Schematic diagram of the local structure connection of the suspension shaft rod and the chassis frame of the present invention;

[0029] Figure 8 Schematic side cross-section of the protective cover plate structure of the present invention;

[0030] Figure 9 Schematic diagram of the separation of the buffer member and the buffer layer structure of the present invention;

[0031] Figure 10 Explosion schematic diagram of the buffer structure of the present invention;

[0032] Figure 11 For the present invention Figure 2 Enlarged schematic diagram of the structure at position A in;

[0033] Figure 12 For the present invention Figure 8 Enlarged schematic diagram of the structure at position B in.

[0034] In the figure: 1. Chassis frame; 11. Avoidance groove; 12. Suspension hook; 13. Mudguard; 2. Protective cover plate; 21. Buffer layer; 22. Cooling pipe; 23. Suspension shaft rod; 24. Connecting arm; 25. Strip-shaped base; 26. Tightening bolt; 3. Battery pack body; 4. Heat exchange partition; 41. Positioning frame; 42. Arc-shaped heat exchange plate; 43. Heat exchange fin; 5. Buffer member; 51. Rubber layer; 52. Metal layer; 53. Step through hole; 54. Internal thread; 6. Buffer; 61. Outer cylinder; 611. Thrust spring; 612. Boss; 613. Polygonal slot; 614. Oil injection hole; 615. Check valve; 616. External thread; 62. Insertion cylinder; 621. Sealing plate; 622. Damping hole; 623. Annular platform; 63. Sealing ring; 64. Sealing ring. Detailed implementation manners

[0035] In order to clearly and completely describe the purpose, technical solution of the present invention, and make the advantages more clear, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0036] Please refer to Figures 1 to 12 , the present invention provides a technical solution:

[0037] Embodiment 1. A replaceable battery protection chassis for a new energy vehicle, comprising: a chassis frame 1 and a buffer member 5.

[0038] Specifically, a protective cover plate 2 is provided in the middle of the chassis frame 1. The middle part of the chassis frame 1 is in a "mouth" shape and is adapted to the protective cover plate 2, allowing the protective cover plate 2 to be installed from bottom to top. The protective cover plate 2 is a hollow structure with an opening at the upper part. A battery pack body 3 is arranged in the inner cavity of the protective cover plate 2. The battery pack body 3 is placed in the inner cavity of the protective cover plate 2 from top to bottom. According to actual needs, in order to prevent the battery pack body 3 from bouncing up and down in the inner cavity of the protective cover plate 2, a baffle (not shown in the figure) is also provided at the upper opening of the protective cover plate 2. The baffle can press down and compact the battery pack body 3 to prevent the battery pack body 3 from detaching from the inner cavity of the protective cover plate 2;

[0039] Secondly, a buffer layer 21 is provided at the bottom of the protective cover plate 2, and the cross-section of the buffer layer 21 is wavy. Combining Figure 4 and Figure 8 it can be known that the buffer layer 21 and the protective cover plate 2 are of an integral structure. The buffer layer 21 is formed by stamping the bottom plate of the protective cover plate 2 with a stamping machine. A heat exchange partition 4 is arranged between the upper side of the buffer layer 21 and the battery pack body 3. A cooling pipe 22 is arranged in the upper groove of the protective cover plate 2. On the one hand, the heat exchange partition 4 is used to separate the cooling pipe 22 and the battery pack body 3 on the upper and lower sides, preventing the cooling pipe 22 from leaking water due to damage and seeping onto the surface of the battery pack body 3, which may cause a failure of the battery pack body 3. On the other hand, the heat exchange partition 4 cooperates with the cooling pipe 22 to exchange heat and cool the battery pack body 3, preventing the battery pack body 3 from generating excessive heat during operation and affecting its own lifespan;

[0040] Furthermore, the buffer member 5 is adhesively fixed in the lower groove of the buffer layer 21, and the lower surface of the buffer member 5 protrudes downward below the buffer layer 21. The buffer member 5 includes two layers, namely a rubber layer 51 and a metal layer 52. The rubber layer 51 is made of a relatively hard rubber material. Since the lower surface of the metal layer 52 is below the buffer layer 21, it can block most of the stones, rocks and other sundries that bounce up during vehicle driving, preventing these sundries from directly hitting the buffer layer 21, thereby extending the service life of the buffer layer 21. A stepped through-hole 53 is formed through the middle of the buffer member 5, and a buffer 6 is arranged in the inner cavity of the stepped through-hole 53. The upper end of the buffer 6 is fixedly connected to the buffer layer 21. The buffer 6 cooperates with the elastic deformation of the rubber layer 51 to improve the overall buffering performance of the buffer member 5, thereby reducing the possibility of the buffer member 5 being damaged due to impact;

[0041] In addition, the buffer 6 includes an outer cylinder 61 and an inner cylinder 62 movably inserted into the inner cavity of the outer cylinder 61. Therefore, the buffer 6 as a whole can be telescopic to cooperate with the elastic deformation generated when the buffer member 5 is impacted. A thrust spring 611 is built into the outer cylinder 61, and the thrust spring 611 is always in a compressed state, so that the buffer 6 as a whole is always in an extended state. An external thread 616 is provided on the outer side wall of the outer cylinder 61, and an internal thread 54 is provided on the lower inner wall of the stepped through hole 53, and the internal thread 54 is adapted to the external thread 616. As Figure 10 and Figure 9 shown, when the outer cylinder 61 rotates, the outer cylinder 61 can be fixedly connected to the metal layer 52 through the cooperation between the external thread 616 and the internal thread 54. The upper end of the inner cylinder 62 can be pre-welded and fixed on the buffer layer 21. Therefore, through the fixed connection between the outer cylinder 61 and the metal layer 52, the possibility that the buffer member 5 is separated from the buffer layer 21 due to insufficient bonding strength between the rubber layer 51 and the buffer layer 21 can be compensated for;

[0042] Combined with the above, it can be seen that in this device, the buffer layer 21 is arranged in a wavy shape, and a buffer member 5 is installed in the lower groove of the buffer layer 21, and the lower surface of the buffer member 5 protrudes below the buffer layer 21. When stones and rocks bounce up during the driving of the vehicle, the buffer member 5 can block and buffer most of the stones and rocks, greatly reducing the impact force generated on the buffer layer 21. In addition, a buffer 6 is installed inside the buffer member 5, and the upper end of the buffer 6 is fixedly connected to the buffer layer 21. Since the distance between adjacent buffer members 5 is small, combined with the wavy structure of the buffer layer 21, the impact force can be further weakened, and the protection effect on the battery pack body 3 can be improved.

[0043] In order to facilitate the fixed connection between the outer cylinder 61 and the metal layer 52, the present application also has a boss 612 provided at the lower end of the outer cylinder 61, and the boss 612 is in a frustum shape. The frustum-shaped boss 612 can more conveniently penetrate into the inner cavity of the stepped through hole 53 from top to bottom, so as to facilitate the threaded connection between the external thread 616 and the internal thread 54. A polygonal slot 613 is opened in the middle of the boss 612. The polygonal slot 613 is a regular hexagon groove structure, which can facilitate the staff to twist the outer cylinder 61 with the help of an inner hexagon wrench. An oil injection hole 614 communicating with the inner cavity of the outer cylinder 61 is opened at the bottom of the polygonal slot 613, and a one-way valve 615 is installed in the inner cavity of the oil injection hole 614. The inner cavity of the outer cylinder 61 is filled with hydraulic oil. The oil injection hole 614 and the one-way valve 615 are provided to facilitate the injection of hydraulic oil into the inner cavity of the outer cylinder 61 and prevent the leakage of hydraulic oil.

[0044] To describe the structure of the buffer 6 in detail, the inner cavity of the insertion cylinder 62 of the present application is hollow, and an opening is provided at one end of the inner cavity of the outer cylinder 61. A sealing ring 63 that is fixedly sleeved on the outer side of one end of the insertion cylinder 62 and is hermetically attached to the inner wall of the outer cylinder 61 is provided. The sealing ring 63 is provided to prevent the hydraulic oil in the inner cavity of the outer cylinder 61 from leaking from the upper opening of the outer cylinder 61. A sealing plate 621 is fixed in the inner cavity of the opening end of the insertion cylinder 62, and damping holes 622 are formed through the surface of the sealing plate 621. As Figure 10 shown, only the damping holes 622 keep the inner cavities of the outer cylinder 61 and the insertion cylinder 62 in communication. When the buffer 6 as a whole expands and contracts, the hydraulic oil will flow and exchange between the inner cavity of the outer cylinder 61 and the inner cavity of the insertion cylinder 62. Since the inner diameter of the damping holes 622 is relatively small, and combined with the viscosity of the hydraulic oil itself, it can generate a damping effect on the flow of the hydraulic oil, thereby ensuring that the overall expansion and contraction of the buffer 6 has a damping effect and can buffer and damp the impact received by the metal layer 52.

[0045] To prevent the insertion cylinder 62 from being separated from the outer cylinder 61, the present application also has a concentric annular platform 623 fixed to the side surface of the sealing ring 63. One end of the thrust spring 611 abuts against the side surface of the sealing ring 63 and is sleeved outside the annular platform 623. A sealing ring 64 is movably sleeved on the outside of the insertion cylinder 62. The sealing ring 64 is fixedly connected to the opening end of the outer cylinder 61 by bolts. The sealing ring 64 is provided to limit the sliding of the sealing ring 63 and prevent the sealing ring 63 from sliding out of the upper opening of the outer cylinder 61, thereby avoiding the possibility of the insertion cylinder 62 and the outer cylinder 61 being separated from each other.

[0046] To suspend the protective cover plate 2, the present application also has strip-shaped bases 25 fixed to both side surfaces of the protective cover plate 2. A suspension shaft rod 23 parallel to the strip-shaped bases 25 is provided outside the strip-shaped bases 25. The suspension shaft rod 23 and the strip-shaped bases 25 are movably connected by a connecting arm 24. A plurality of connecting arms 24 are provided and are equally spaced along the length direction of the strip-shaped bases 25. As Figure 4 and Figure 7 shown, the lower end of the connecting arm 24 is rotatably connected to the strip-shaped base 25, and the suspension shaft rod 23 is relatively fixed to the connecting arm 24. Therefore, when the connecting arm 24 rotates around its lower end, it can drive the suspension shaft rod 23 to displace. By suspending the suspension shaft rod 23, the present device can suspend and install the entire protective cover plate 2 and the battery pack body 3.

[0047] In order to suspend the suspension shaft rod 23, the present application also has avoidance grooves 11 opened on the inner walls of both sides of the chassis frame 1, and suspension hooks 12 are formed. The side surface of the suspension hook 12 is attached to the outer side wall of the protective cover plate 2. The suspension shaft rod 23 penetrates into the inner cavity of the avoidance groove 11 from bottom to top, and after the suspension shaft rod 23 rotates close to the protective cover plate 2, it is stuck inside the suspension hook 12. The suspension shaft rod 23 is suspended on the suspension hook 12 by means of gravity. The side surface of the suspension hook 12 is provided with mudguard plates 13 corresponding to a plurality of connecting arms 24 one by one. Combining Figure 5 and Figure 7 As shown, the suspension installation process of the protective cover plate 2 of the present device is as follows: Place the protective cover plate 2 in the middle of the chassis frame 1 from top to bottom, and the suspension shaft rod 23 slides into the inner cavity of the avoidance groove 11 from bottom to top. During this process, the suspension shaft rod 23 maintains a 45-degree inclination until the suspension shaft rod 23 contacts the upper inner wall of the avoidance groove 11. Then, the staff can push the connecting arm 24 to turn upwards to clip the suspension shaft rod 23 inside the suspension hook 12. At this time, release the protective cover plate 2. After the protective cover plate 2 moves slightly downward, the suspension shaft rod 23 can be suspended inside the suspension hook 12 under the action of the gravity of the protective cover plate 2.

[0048] In order to prevent the protective cover plate 2 from shaking and displacing, the present application also has a recessed groove corresponding to the strip-shaped base 25 opened on the lower side of the suspension hook 12. A tightening bolt 26 is provided through the middle of the strip-shaped base 25 by means of a thread. The upper end of the tightening bolt 26 abuts against the bottom of the recessed groove on the lower side of the suspension hook 12. After suspending the suspension shaft rod 23 inside the suspension hook 12 to suspend the protective cover plate 2, when the staff turns the tightening bolt 26 and the upper end of the tightening bolt 26 abuts against the suspension hook 12, the limit of the strip-shaped base 25 can be realized, and the strip-shaped base 25 and the protective cover plate 2 can be prevented from moving upward. In this state, the side surface of the protective cover plate 2 is attached to the side surface of the suspension hook 12. The protective cover plate 2 is positioned by the chassis frame 1 in the horizontal direction, and the protective cover plate 2 is positioned by the cooperation of the tightening bolt 26 and the strip-shaped base 25 in the vertical direction. Therefore, the protective cover plate 2 itself can remain stable and will not shift in position. In addition, a mudguard plate 13 is fixedly connected to the lower opening end of the avoidance groove 11 by bolts. The mudguard plate 13 is used to block the inner cavity of the avoidance groove 11 to prevent dust, water, sundries, etc. from entering the inner cavity of the avoidance groove 11.

[0049] In order to cool the battery pack body 3, the length and width of the buffer layer 21 of the present application are respectively smaller than the inner length and width of the protective cover plate 2. The cooling pipes 22 are distributed in an "S" shape in the inner cavity of the protective cover plate 2. The diameter of the cooling pipes 22 is smaller than the depth of the upper groove of the buffer layer 21, and a flexible layer is padded under the lower side of the cooling pipes 22. The heat exchange partition plate 4 is placed on the upper side of the buffer layer 21 and there is a gap between the heat exchange partition plate 4 and the cooling pipes 22. As Figure 4 and Figure 8As can be seen, the cooling pipe 22 is placed in the upper groove of the buffer layer 21, which can avoid being squeezed by the heat exchange partition 4. Cooling water is transported in the inner cavity of the cooling pipe 22, and the heat exchange of the heat exchange partition 4 can achieve the cooling of the battery pack body 3.

[0050] In order to prevent the battery pack body 3 from shaking, the heat exchange partition 4 of the present application divides the inner cavity of the protective cover plate 2 into two independent upper and lower layers. A positioning frame 41 adapted to the battery pack body 3 is fixed on the upper surface of the heat exchange partition 4. The positioning frame 41 is provided to position the battery pack body 3 and prevent the battery pack body 3 from shaking in the horizontal direction.

[0051] In order to improve the heat exchange and cooling effect on the battery pack body 3, the present application also has an arc-shaped heat exchange plate 42 disposed below the heat exchange partition 4 and located in the upper groove of the buffer layer 21, and the arc-shaped heat exchange plate 42 semi-envelops the outside of the cooling pipe 22. A plurality of heat exchange fins 43 are fixed along the length direction of the outside of the arc-shaped heat exchange plate 42 at equal intervals, and the heat exchange fins 43 are fixed to the lower surface of the heat exchange partition 4. The heat exchange fins 43 are stuck in the upper groove of the buffer layer 21 and are adapted to it. As Figure 2 and Figure 11 shown, the arrangement of the heat exchange fins 43 and the arc-shaped heat exchange plate 42 can increase the contact area between the heat exchange partition 4 and the cooling pipe 22, thereby improving the heat exchange effect of the cooling pipe 22 on the heat exchange partition 4 and ensuring that the heat exchange partition 4 can achieve a better heat exchange and cooling effect on the battery pack body 3.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A replaceable battery protection chassis for new energy vehicles, characterized in that: include: A chassis frame (1), wherein a protective cover plate (2) is arranged in the middle of the chassis frame (1), the protective cover plate (2) is a hollow structure with an opening at the top, and a battery pack body (3) is arranged in the inner cavity of the protective cover plate (2); A buffer layer (21) is provided at the bottom of the protective cover plate (2), and the cross section of the buffer layer (21) is wavy; a heat exchange baffle (4) is provided between the upper side of the buffer layer (21) and the battery pack body (3); and a cooling pipe (22) is provided in the groove on the upper side of the protective cover plate (2); A buffer (5), the buffer (5) being bonded and fixed in the lower groove of the buffer layer (21), and the lower surface of the buffer (5) protruding downward to below the buffer layer (21), the buffer (5) comprising an upper and lower layer, which are a rubber layer (51) and a metal layer (52), respectively, a stepped through hole (53) penetrating the middle of the buffer (5), a buffer (6) being arranged in the inner cavity of the stepped through hole (53), and the upper end of the buffer (6) being fixedly connected to the buffer layer (21); The buffer (6) comprises an outer tube (61) and an insert tube (62) movably inserted into the inner cavity of the outer tube (61); a thrust spring (611) is built into the outer tube (61); an outer wall of the outer tube (61) is provided with an outer thread (616); an inner wall of the lower side of the stepped through hole (53) is provided with an inner thread (54), and the inner thread (54) is matched with the outer thread (616).

2. The replaceable battery protection chassis for new energy vehicles according to claim 1 is characterized in that: A boss (612) is provided at the lower end of the outer cylinder (61), and the boss (612) is in the shape of a truncated cone. A polygonal slot (613) is provided in the middle of the boss (612). An oil injection hole (614) communicating with the inner cavity of the outer cylinder (61) is provided at the bottom of the groove of the polygonal slot (613), and a one-way valve (615) is installed in the inner cavity of the oil injection hole (614). The inner cavity of the outer cylinder (61) is filled with hydraulic oil.

3. The replaceable battery protection chassis for new energy vehicles according to claim 2 is characterized in that: The insert tube (62) is hollow inside and is provided with an opening at one end located in the inner cavity of the outer tube (61). A sealing ring (63) is fixedly sleeved on the outer side of one end of the insert tube (62) and is in sealing contact with the inner wall of the outer tube (61). A sealing plate (621) is fixed to the inner cavity of the open end of the insert tube (62), and a damping hole (622) is formed through the surface of the sealing plate (621).

4. The replaceable battery protection chassis for new energy vehicles according to claim 3 is characterized in that: A concentric annular platform (623) is fixed to the side of the sealing ring (63); one end of the thrust spring (611) abuts against the side of the sealing ring (63) and is sleeved on the outside of the annular platform (623); a sealing ring (64) is movably sleeved on the outside of the insert cylinder (62); and the sealing ring (64) is fixedly connected to the open end of the outer cylinder (61) by bolts.

5. The replaceable battery protection chassis for new energy vehicles according to claim 1 is characterized in that: A strip base (25) is fixed to both side surfaces of the protective cover plate (2), and a suspension shaft (23) parallel to the strip base (25) is arranged on the outer side of the strip base (25). The suspension shaft (23) and the strip base (25) are movably connected via a connecting arm (24), and a plurality of connecting arms (24) are arranged and are evenly spaced along the length direction of the strip base (25).

6. The replaceable battery protection chassis for new energy vehicles according to claim 5 is characterized in that: The inner walls on both sides of the chassis frame (1) are provided with avoidance grooves (11) and form suspension hooks (12). The sides of the suspension hooks (12) fit the outer walls of the protective cover plate (2). The suspension shaft rod (23) penetrates into the inner cavity of the avoidance groove (11) from bottom to top, and the suspension shaft rod (23) is rotated close to the protective cover plate (2) and then stuck on the inner side of the suspension hook (12). The suspension shaft rod (23) is suspended on the suspension hook (12) by gravity. The side of the suspension hook (12) is provided with a fender guard (13) corresponding to a plurality of connecting arms (24).

7. The replaceable battery protection chassis for new energy vehicles according to claim 6 is characterized in that: The lower side of the suspension hook (12) is provided with a recessed groove corresponding to the strip base (25); a tightening bolt (26) is provided through a thread in the middle of the strip base (25); the upper end of the tightening bolt (26) abuts against the bottom of the recessed groove on the lower side of the suspension hook (12); and the lower open end of the avoidance groove (11) is fixedly connected to a fender guard (13) by means of bolts.

8. The replaceable battery protection chassis for new energy vehicles according to claim 1 is characterized in that: The length and width of the buffer layer (21) are respectively smaller than the inner length and width of the protective cover plate (2); the cooling pipe (22) is distributed in an "S" shape in the inner cavity of the protective cover plate (2); the diameter of the cooling pipe (22) is smaller than the depth of the groove on the upper side of the buffer layer (21); and a flexible layer is padded on the lower side of the cooling pipe (22); the heat exchange baffle (4) is placed on the upper side of the buffer layer (21) and a gap is left between the cooling pipe (22) and the heat exchange baffle (4).

9. The replaceable battery protection chassis for new energy vehicles according to claim 8 is characterized in that: The heat exchange baffle (4) divides the inner cavity of the protective cover plate (2) into two independent layers, one above the other. A positioning frame (41) adapted to the battery pack body (3) is fixed to the upper surface of the heat exchange baffle (4).

10. The replaceable battery protection chassis for new energy vehicles according to claim 9, characterized in that: An arc-shaped heat exchange plate (42) is arranged below the heat exchange baffle (4) and is located in the groove on the upper side of the buffer layer (21), and the arc-shaped heat exchange plate (42) half covers the outer side of the cooling tube (22); a plurality of heat exchange fins (43) distributed at equal intervals are fixed to the outer side of the arc-shaped heat exchange plate (42) along its length direction, and the heat exchange fins (43) are fixed to the lower surface of the heat exchange baffle (4); the heat exchange fins (43) are stuck in the groove on the upper side of the buffer layer (21) and are adapted thereto.

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