New energy automobile battery module

Abstract

The invention relates to the technical field of new energy batteries, and discloses a new energy automobile battery module, which comprises an outer box, an inner box and a plurality of groups of battery modules, the inner box is fixedly mounted in the outer box, the plurality of groups of battery modules are mounted in the inner box, and the outer box is fixedly mounted in the inner box. The multiple groups of battery modules are connected in series or in parallel through conductive devices; a gap is formed between the outer box and the inner box, and buffering assemblies are arranged in the gap and outside the outer box. The buffer assembly is arranged between the outer box and the inner box, so that when an automobile is collided by a chassis or collided by the automobile in the running process, the inner box in the outer box can be buffered through the buffer assembly, after the automobile is collided, external impact force can be effectively absorbed by the buffer assembly, and the service life of the inner box is prolonged. Therefore, the inner box does not deform or hardly deforms, so that the battery module in the inner box is effectively protected, and the safety of the battery is protected.

Description

Technical Field

[0001] This invention relates to the field of new energy battery technology, specifically to a new energy vehicle battery module. Background Technology

[0002] There are several main types of batteries for new energy vehicles: Lithium iron phosphate batteries have good stability, but their energy density is lower than that of ternary lithium batteries and lithium cobalt oxide batteries, and their charging efficiency decreases at low temperatures; Ternary lithium batteries have higher safety and are more suitable for the future development trend of new energy vehicle batteries, especially suitable for northern climates, where they are more stable at low temperatures; In existing new energy vehicles, the battery module is protected by the chassis guard plate, which can only prevent minor bumps from flying stones. In the event of an accident, the battery module may deform after being subjected to a violent impact, causing a short circuit in the battery cell and potentially leading to spontaneous combustion. Therefore, a buffer structure is needed to effectively protect the battery module. Summary of the Invention

[0003] This invention provides the following technical solution:

[0004] A new energy vehicle battery module includes an outer casing, an inner casing, and a battery module. The inner casing is fixedly installed inside the outer casing. The battery module has multiple sets, which are installed inside the inner casing. The multiple sets of battery modules are connected in series or in parallel through a conductive device.

[0005] There is a gap between the outer box and the inner box, and there is a cushioning component inside the gap and outside the outer box;

[0006] By installing a buffer component between the outer and inner boxes, when the vehicle is bumped or hit by the chassis while driving, the buffer component can cushion the inner box inside the outer box. When impacted, the external impact force can be effectively absorbed by the buffer component, so that the inner box does not deform or undergoes very little deformation, thereby effectively protecting the battery module inside the inner box and protecting battery safety.

[0007] Preferably, the buffer assembly includes a buffer beam, and the buffer beam has energy-absorbing blocks between its two ends in the direction of vehicle travel and the outer wall of the outer box. The energy-absorbing blocks include multi-layered annular sleeves, and the multi-layered annular sleeves form a tower-shaped main body with increasing or decreasing diameters. The interior of the tower-shaped main body composed of multi-layered annular sleeves is hollow.

[0008] By further installing a buffer beam on the outside of the outer box, when the car is impacted, the energy-absorbing block located inside the buffer beam has a multi-layered ring structure, which can buffer the impact force in multiple ways, thus further improving the buffering performance.

[0009] Preferably, multiple energy-absorbing blocks are provided on the inner sides of both the front and rear ends of the buffer beam, and the gaps between the multiple energy-absorbing blocks are equal.

[0010] Preferably, the top of the buffer beam is connected to a protective cover, which is U-shaped. The bottom of the protective cover and the top of the battery module have a flow space, and the two ends of the flow space are interconnected, with the direction of the connection being consistent with the direction of travel.

[0011] Preferably, there is a gap between two adjacent battery modules, and an air vent is provided at the bottom of the outer casing. The position of the air vent corresponds to the position of the gap, and external air can be blown into the gap through the air vent. The air vent has an angle inclined towards the driving direction. An air guide plate is also connected to the bottom of the air vent. The air guide plate has the same inclination angle as the air vent. A bottom plate is also provided below the outer casing. The front and rear ends of the bottom plate are fixedly connected to the bottom of the outer casing. An arc-shaped surface is provided at the rear end of the bottom of the outer casing. The arc-shaped surface is close to the rear of the vehicle.

[0012] By setting a gap between two adjacent battery modules and simultaneously setting an air vent at the bottom of the outer casing, air can be blown into the interior of the outer casing from the air vent when the vehicle is in operation, and blown to the sides of the battery modules, thereby dissipating heat from the battery modules, preventing them from overheating, and protecting the battery modules.

[0013] Preferably, the outer wall of the outer casing and the bottom of the protective cover are provided with mounting holes, and bolts and nuts are inserted into the mounting holes. The outer casing and the protective cover are fixedly installed by bolts and nuts. An elastic strip is connected to the outer wall of the outer casing, and the inner wall of the protective cover is in contact with the elastic strip.

[0014] Preferably, the outer casing has slots at all four corners, which are connected to the interior of the outer casing, allowing external air to enter through the slots and exit through the slots at the other end.

[0015] Preferably, the inner wall of the outer box is connected to a buffer block, and the outer wall of the inner box is connected to a buffer bladder. The vertical cross-sectional shape of the buffer bladder and the buffer block is triangular. The middle part of the buffer bladder is hollow and its top is open to the outside. Buffer posts are also provided at the four corners of the inner wall of the outer box. The other end of the buffer post is fixed to the four corners of the outer wall of the inner box. The buffer posts, buffer blocks and buffer bladder are all made of rubber.

[0016] By installing buffer blocks on the inner wall of the outer box and buffer bladders on the outer wall of the inner box, the impact force can be absorbed by deforming the buffer bladders when the vehicle is hit.

[0017] Preferably, the top of the battery module is provided with a connecting plate, the connecting plate has multiple contact points, and the multiple contact points are connected by an etching circuit. Each battery module has a connecting point on its top, and the connecting point is in contact with the contact point. The connecting plate has an elongated hole, one end of which is connected to an arc-shaped plate, and the elongated hole is connected to the bottom of the connecting plate.

[0018] Preferably, the connecting plate is connected to two lifting rods at both ends, the two ends of the lifting rods are connected to the inner wall of the outer casing, the bottom of the lifting rods are in contact with the top of the buffer bladder, the top of the protective cover is connected to two contact rods, the top of the protective cover is connected to a sliding groove, the outer walls of the two contact rods are glued to the inner wall of the sliding groove, the middle of the contact rods is provided with a wire core, the adjacent ends of the two contact rods have a gap, and a spring is connected between the top of the connecting plate and the bottom of the inner wall of the protective cover. There are multiple springs, and the multiple springs, the two contact rods and the battery module are connected in series by cables.

[0019] With the above solution, when the outer casing is impacted, the buffer blocks on the inner wall of the outer casing press against the buffer bladders on the outer wall of the inner casing. Since the buffer bladders are hollow, they can be compressed when they are compressed. When the buffer bladders are compressed, the air inside them is discharged from the top of the buffer bladders. The discharged air drives the lifting rod to rise, and finally the lifting rod drives the connecting plate to rise synchronously, thereby allowing the connecting plate to separate from the battery module, thus achieving the purpose of power disconnection, preventing short circuits in the battery module, and improving the safety of the battery module.

[0020] Compared with the prior art, the present invention provides a new energy vehicle battery module with the following advantages:

[0021] 1. This invention provides a buffer component between the outer and inner boxes. When the vehicle is bumped or hit by the chassis during driving, the buffer component can cushion the inner box inside the outer box. When impacted, the external impact force can be effectively absorbed by the buffer component, thus preventing or minimizing deformation of the inner box and effectively protecting the battery module inside the inner box, thereby protecting battery safety.

[0022] 2. The present invention further improves the buffering performance by setting a buffer beam on the outside of the outer box, so that when the car is impacted, the tower-shaped energy-absorbing block with a multi-layered ring structure located inside the buffer beam can buffer the impact force in multiple ways.

[0023] 3. This invention, by setting up a lifting rod, allows the buffer blocks on the inner wall of the outer casing to press against the buffer bladder on the outer wall of the inner casing when the outer casing is impacted. Since the buffer bladder is hollow, it can be compressed when it is compressed, and the air inside is discharged from the top of the buffer bladder. The discharged gas drives the lifting rod to rise, and finally the lifting rod drives the connecting plate to rise synchronously, thereby allowing the connecting plate to leave the battery module, thus achieving the purpose of power disconnection, preventing short circuit of the battery module, and improving the safety of the battery module.

[0024] 4. This invention sets a gap between two adjacent battery modules and sets an air vent at the bottom of the outer casing. When the car is in motion, air can be blown into the interior of the outer casing through the air vent and blown to the side of the battery module, thereby dissipating heat from the battery module, preventing the battery module from overheating, and protecting the battery module. Attached Figure Description

[0025] Figure 1 This is a perspective view of the entire invention;

[0026] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a perspective view of the outer casing, inner casing, and battery module of the present invention;

[0028] Figure 4 This is a top sectional view of the present invention;

[0029] Figure 5 This is a front sectional view of the present invention;

[0030] Figure 6 This is a perspective view of the connecting plate and inner box of the present invention;

[0031] Figure 7 This is a perspective view of the inner and outer boxes of the present invention;

[0032] Figure 8 This is a perspective view of the outer casing of the present invention;

[0033] Figure 9 This is a partial structural cross-sectional view of the connecting plate, spring, and contact rod of the present invention.

[0034] In the diagram: 100, outer casing; 101, buffer beam; 102, energy-absorbing block; 103, battery module; 104, connection point; 105, mounting hole; 106, slot; 107, elastic strip; 108, protective cover; 200, inner casing; 201, buffer bladder; 202, buffer block; 203, air vent; 204, air guide plate; 205, bottom plate; 206, curved surface; 207, buffer column; 300, connecting plate; 301, elongated hole; 302, curved plate; 303, lifting rod; 304, contact rod; 305, sliding groove; 306, spring. Detailed Implementation

[0035] See Figure 1-9 This embodiment provides a new energy vehicle battery module, including an outer box 100, an inner box 200 and a battery module 103. The inner box 200 is fixedly installed inside the outer box 100. The battery module 103 has multiple sets, and the multiple sets of battery modules 103 are installed inside the inner box 200. The multiple sets of battery modules 103 are connected in series or in parallel through conductive devices.

[0036] There is a gap between the outer box 100 and the inner box 200, and a buffer assembly is provided inside the gap and outside the outer box 100;

[0037] By setting a buffer assembly between the outer box 100 and the inner box 200, when the vehicle is bumped or hit by the chassis during driving, the buffer assembly can cushion the inner box 200 inside the outer box 100. When impacted, the external impact force can be effectively absorbed by the buffer assembly, so that the inner box 200 does not deform or undergoes very little deformation, thereby effectively protecting the battery module 103 inside the inner box 200 and protecting battery safety.

[0038] As one possible embodiment, the buffer assembly includes a buffer beam 101, and the buffer beam 101 has energy-absorbing blocks 102 between its two ends in the direction of vehicle travel and the outer wall of the outer box 100. The energy-absorbing blocks 102 include multi-layered annular sleeves, which form a tower-shaped main body with increasing or decreasing diameters. The interior of the tower-shaped main body composed of multi-layered annular sleeves is hollow.

[0039] By further providing a buffer beam 101 on the outside of the outer box 100, when the car is impacted, the tower-shaped energy-absorbing block 102 with a multi-layered annular structure located inside the buffer beam 101 can buffer the impact force in multiple ways, thereby further improving the buffering performance.

[0040] As one possible embodiment, multiple energy-absorbing blocks 102 are provided on the inner sides of both the front and rear ends of the buffer beam 101, and the gaps between the multiple energy-absorbing blocks 102 are equal.

[0041] As one possible embodiment, the top of the buffer beam 101 is connected to a protective cover 108, which is U-shaped. The bottom of the protective cover 108 and the top of the battery module 103 have a flow space, and the two ends of the flow space are interconnected, with the direction of the connection being consistent with the direction of travel.

[0042] As one possible embodiment, there is a gap between two adjacent battery modules 103. The bottom of the outer casing 100 is provided with an air guide 203. The position of the air guide 203 corresponds to the position of the gap. External air can be blown into the gap through the air guide 203. The air guide 203 has an angle inclined towards the driving direction. The bottom of the air guide 203 is also connected to an air guide plate 204. The air guide plate 204 has the same inclination angle as the air guide 203. A bottom plate 205 is also provided below the outer casing 100. The front and rear ends of the bottom plate 205 are fixedly connected to the bottom of the outer casing 100. The rear end of the bottom of the outer casing 100 is provided with an arc-shaped surface 206. The arc-shaped surface 206 is close to the rear of the vehicle.

[0043] By setting a gap between two adjacent battery modules 103 and simultaneously setting an air vent 203 at the bottom of the outer casing 100, air can be blown into the interior of the outer casing 100 from the air vent 203 when the car is in motion, and blown to the side of the battery module 103, thereby dissipating heat from the battery module 103, preventing the battery module 103 from overheating, and protecting the battery module 103.

[0044] As one possible embodiment, the outer wall of the outer casing 100 and the bottom of the protective cover 108 are both provided with mounting holes 105. Bolts and nuts are inserted into the mounting holes 105. The outer casing 100 and the protective cover 108 are fixedly installed by bolts and nuts. An elastic strip 107 is connected to the outer wall of the outer casing 100, and the inner wall of the protective cover 108 is in contact with the elastic strip 107.

[0045] As one possible embodiment, slots 106 are provided at each of the four corners of the outer casing 100. The slots 106 are connected to the interior of the outer casing 100, allowing external air to enter through the slots 106 and exit through the slots 106 at the other end.

[0046] As one possible embodiment, the inner wall of the outer box 100 is connected to a buffer block 202, and the outer wall of the inner box 200 is connected to a buffer bladder 201. The vertical cross-sectional shape of the buffer bladder 201 and the buffer block 202 is triangular. The middle part of the buffer bladder 201 is hollow, and its top is open to the outside. Buffer posts 207 are also provided at the four corners of the inner wall of the outer box 100. The other end of the buffer post 207 is fixed to the four corners of the outer wall of the inner box 200. The buffer posts 207, the buffer block 202 and the buffer bladder 201 are all made of rubber.

[0047] As one possible embodiment, a connecting plate 300 is provided on the top of the battery module 103. The connecting plate 300 has multiple contact points, and the multiple contact points are connected by an etching circuit. Each battery module 103 has a connection point 104 on its top, and the connection point 104 is in contact with the contact points. An elongated hole 301 is provided on the connecting plate 300. One end of the elongated hole 301 is connected to an arc-shaped plate 302, and the elongated hole 301 is connected to the bottom of the connecting plate 300.

[0048] As one possible embodiment, the connecting plate 300 is connected to two lifting rods 303 at both ends. The two ends of the lifting rods 303 are connected to the inner wall of the outer casing 100. The bottom of the lifting rods 303 contacts the top of the buffer bladder 201. The top of the protective cover 108 is connected to two contact rods 304. The top of the protective cover 108 is connected to a sliding groove 305. The outer walls of the two contact rods 304 are glued to the inner wall of the sliding groove 305. A wire core is provided in the middle of the contact rods 304. There is a gap between the adjacent ends of the two contact rods 304. A spring 306 is connected between the top of the connecting plate 300 and the bottom of the inner wall of the protective cover 108. There are multiple springs 306. The multiple springs 306, the two contact rods 304 and the battery module 103 are connected in series by cables.

[0049] With the above solution, when the outer casing 100 is impacted, the buffer block 202 on the inner wall of the outer casing 100 presses against the buffer bladder 201 on the outer wall of the inner casing 200. Since the buffer bladder 201 is hollow, it can be compressed when it is compressed. When the buffer bladder 201 is compressed, the air inside it is discharged from the top of the buffer bladder 201. The discharged gas drives the lifting rod 303 to rise. Finally, the lifting rod 303 drives the connecting plate 300 to rise synchronously, thereby allowing the connecting plate 300 to leave the battery module 103, thus achieving the purpose of power disconnection, preventing the battery module 103 from short-circuiting, and improving the safety of the battery module 103.

[0050] Furthermore, when the car is impacted, one of the contact rods 304 is displaced under the impact, causing the two contact rods 304 to come into contact with each other, thereby connecting the circuit. Under the action of the electromagnetic field, the spring 306 contracts, causing the connecting plate 300 to move upward, thereby cutting off the circuit of the battery module 103 and protecting the safety of the battery module 103.

Claims

1. A new energy vehicle battery module, characterized in that: It includes an outer casing (100), an inner casing (200), and a battery module (103). The inner casing (200) is fixedly installed inside the outer casing (100). The battery module (103) has multiple sets, and the multiple sets of battery modules (103) are installed inside the inner casing (200). The multiple sets of battery modules (103) are connected in series or in parallel through conductive devices. There is a gap between the outer casing (100) and the inner casing (200), and there is a buffer assembly inside the gap and outside the outer casing (100).

2. The new energy vehicle battery module according to claim 1, characterized in that: The buffer assembly includes a buffer beam (101), which has energy-absorbing blocks (102) located between the two ends of the buffer beam (101) in the direction of vehicle travel and the outer wall of the outer box (100). The energy-absorbing blocks (102) include multi-layered annular sleeves, which form a tower-shaped main body with increasing or decreasing diameter. The interior of the tower-shaped main body composed of multi-layered annular sleeves is hollow.

3. A new energy vehicle battery module according to claim 2, characterized in that: Multiple energy-absorbing blocks (102) are provided on the inner sides of both the front and rear ends of the buffer beam (101), and the gaps between the multiple energy-absorbing blocks (102) are equal.

4. A new energy vehicle battery module according to claim 2, characterized in that: The top of the buffer beam (101) is connected to a protective cover (108). The protective cover (108) is U-shaped. The bottom of the protective cover (108) and the top of the battery module (103) have a flow space. The two ends of the flow space are interconnected, and the direction of the connection is consistent with the direction of driving.

5. A new energy vehicle battery module according to claim 1, characterized in that: There is a gap between two adjacent battery modules (103). An air vent (203) is provided at the bottom of the outer casing (100). The position of the air vent (203) corresponds to the position of the gap. External air can be blown into the gap through the air vent (203). The air vent (203) has an angle inclined towards the driving direction. An air guide plate (204) is also connected to the bottom of the air vent (203). The air guide plate (204) has the same inclination angle as the air vent (203). A bottom plate (205) is also provided below the outer casing (100). The front and rear ends of the bottom plate (205) are fixedly connected to the bottom of the outer casing (100). An arc-shaped surface (206) is provided at the rear end of the bottom of the outer casing (100). The arc-shaped surface (206) is close to the rear of the vehicle.

6. A new energy vehicle battery module according to claim 4, characterized in that: The outer wall of the outer casing (100) and the bottom of the protective cover (108) are provided with mounting holes (105). Bolts and nuts are inserted into the mounting holes (105). The outer casing (100) and the protective cover (108) are fixedly installed by bolts and nuts. An elastic strip (107) is connected to the outer wall of the outer casing (100). The inner wall of the protective cover (108) is in contact with the elastic strip (107).

7. A new energy vehicle battery module according to claim 1, characterized in that: The outer casing (100) has slots (106) at each of its four corners. The slots (106) are connected to the interior of the outer casing (100), allowing external air to enter through the slots (106) and exit through the slots (106) at the other end.

8. A new energy vehicle battery module according to claim 1, characterized in that: The inner wall of the outer box (100) is connected to a buffer block (202), and the outer wall of the inner box (200) is connected to a buffer bladder (201). The vertical cross-sectional shape of the buffer bladder (201) and the buffer block (202) is triangular. The middle part of the buffer bladder (201) is hollow and its top is open to the outside. The four corners of the inner wall of the outer box (100) are also provided with buffer posts (207). The other end of the buffer post (207) is fixed to the four corners of the outer wall of the inner box (200). The buffer post (207), the buffer block (202) and the buffer bladder (201) are all made of rubber.

9. A new energy vehicle battery module according to claim 8, characterized in that: The top of the battery module (103) is provided with a connecting plate (300), the connecting plate (300) has multiple contact points, and the multiple contact points are connected by an etching circuit. The top of each battery module (103) is provided with a connection point (104), the connection point (104) is in contact with the contact point, the connecting plate (300) is provided with an elongated hole (301), one end of the elongated hole (301) is connected to an arc plate (302), and the elongated hole (301) is connected to the bottom of the connecting plate (300).

10. A new energy vehicle battery module according to claim 9, characterized in that: The connecting plate (300) is connected to two lifting rods (303) at both ends. The two ends of the lifting rods (303) are connected to the inner wall of the outer casing (100). The bottom of the lifting rods (303) is in contact with the top of the buffer bladder (201). The top of the protective cover (108) is connected to two contact rods (304). The top of the protective cover (108) is connected to a sliding groove (305). The outer walls of the two contact rods (304) are glued to the inner wall of the sliding groove (305). The middle of the contact rods (304) is provided with a wire core. There is a gap between the adjacent ends of the two contact rods (304). A spring (306) is connected between the top of the connecting plate (300) and the bottom of the inner wall of the protective cover (108). There are multiple springs (306). The multiple springs (306), the two contact rods (304), and the battery module (103) are connected in series by cables.

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