Battery assembly and electric vehicle adopting same

Abstract

The utility model discloses a battery assembly and an electric vehicle adopting the battery assembly. The battery assembly comprises a fire retardant device. A first bottom plate, a second bottom plate and a filter plate, the first bottom plate is connected with the shell, an exhaust hole is formed in the first bottom plate, and at least part of the anti-explosion valve is located in the exhaust hole; the filter plate basically extends in the opening direction of the exhaust hole, the filter plate surrounds to form an exhaust channel, the exhaust channel is communicated with the exhaust hole, one end of the filter plate is connected with the first bottom plate, the other end of the filter plate is connected with the second bottom plate, filter holes communicated with the exhaust channel are formed in the filter plate, and the exhaust hole is communicated with the outside through the filter holes. Through the arrangement, the safety performance of the battery assembly can be improved.

Description

Technical Field

[0001] The present application relates to the fields of vehicles and power devices, and particularly to a battery assembly and an electric vehicle using the battery assembly. Background Art

[0002] Currently, electric vehicles include electric bicycles, electric motorcycles, electric four-wheel vehicles, etc. A battery assembly is provided inside each electric vehicle, and the battery assembly can provide sufficient electric energy for the electric vehicle to achieve normal operation.

[0003] In the prior art, the battery assembly includes a housing, a battery module, and an explosion-proof valve. The battery module is located inside the housing, and the explosion-proof valve is connected to the housing. When the battery module inside the housing catches fire accidentally, the explosion-proof valve is separated from the housing under the influence of the air pressure inside and outside the housing, resulting in the ejection of metal particles and flames inside the housing, which can harm the driver and passenger, and thus the safety performance of the battery assembly is relatively low. Summary of the Utility Model

[0004] In order to solve the deficiencies of the prior art, the purpose of the present application is to provide a battery assembly and an electric vehicle using the battery assembly, and the battery assembly has relatively high safety performance.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] A battery assembly, which includes a housing, a battery module, an explosion-proof valve, and a fire-blocking device. The battery module is located inside the housing; at least part of the explosion-proof valve penetrates the housing, and the explosion-proof valve is connected to the housing; the fire-blocking device is arranged around the explosion-proof valve, and the fire-blocking device is connected to the housing; a first bottom plate, a second bottom plate, and a filter plate. The first bottom plate is connected to the housing, and an exhaust hole is formed on the first bottom plate. At least part of the explosion-proof valve is located inside the exhaust hole; the filter plate extends substantially along the opening direction of the exhaust hole, and the filter plate surrounds to form an exhaust passage, and the exhaust passage is communicated with the exhaust hole. One end of the filter plate is connected to the first bottom plate, the other end of the filter plate is connected to the second bottom plate, and filter holes communicating with the exhaust passage are formed on the filter plate, and the exhaust hole is communicated with the outside through the filter holes.

[0007] Further, the fire-blocking device further includes a heat dissipation plate. The heat dissipation plate is arranged between the first bottom plate and the second bottom plate, and the heat dissipation plate extends substantially along the extension direction of the exhaust hole. The filter plate is fixedly connected to the first floor, or the filter plate is fixedly connected to the second bottom plate.

[0008] Further, a smoke exhaust gap is formed between the heat dissipation plate and the first bottom plate, or a smoke exhaust gap is formed between the heat dissipation plate and the second bottom plate. The heat dissipation plate is arranged around the exhaust hole, and the exhaust hole is communicated with the outside through the smoke exhaust gap; the filter plate is arranged around the heat dissipation plate, or the heat dissipation plate is arranged around the filter plate; the range of the minimum distance between the filter plate and the heat dissipation plate is 1.5 mm to 7.5 mm.

[0009] Further, the filter plate includes a first filter plate and a second filter plate. The first filter plate is disposed outside the second filter plate, and the heat dissipation plate is located between the first filter plate and the second filter plate.

[0010] Further, a heat dissipation channel is formed inside the flame arrester device. The heat dissipation channel is located between the first filter plate and the second filter plate, and the filter holes are communicated with the heat dissipation channel.

[0011] Further, at least a part of the second bottom plate extends towards the direction close to the first bottom plate to form a limiting block. The limiting block is located between the first filter plate and the second filter plate, and the end of the heat dissipation plate far away from is fixedly connected to the limiting block.

[0012] Further, the flame arrester device further includes a heat dissipation plate. A smoke exhaust gap is formed between the heat dissipation plate and the first bottom plate. A smoke exhaust hole is formed on the housing. The explosion-proof valve is clamped in the smoke exhaust hole, and the exhaust volume of the smoke exhaust gap is greater than or equal to the exhaust volume of the smoke exhaust hole.

[0013] Further, the housing includes a plurality of first connection parts disposed around the smoke exhaust hole. The first bottom plate includes a plurality of second connection parts disposed around the exhaust hole. The plurality of first connection parts are connected to the plurality of second connection parts.

[0014] Further, along the extending direction of the exhaust hole, the distance between the first bottom plate and the second bottom plate is greater than the length of the explosion-proof valve along the extending direction of the exhaust hole.

[0015] An electric vehicle includes a frame, a body covering, a traveling assembly, and a suspension assembly. The body covering is at least partially disposed on the frame; the traveling assembly is at least partially disposed below the frame; the traveling assembly is mounted to the frame through the suspension assembly; the electric vehicle includes the battery assembly of any one of the foregoing, and the battery assembly is at least partially disposed in the space formed by surrounding the frame.

[0016] The above motorcycle can cover the flame arrester device on the explosion-proof valve, so that the filter plate can reduce the temperature of the combustible gas, prevent the flame and metal particles from splashing to the outside of the housing, thereby improving the safety performance of the battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic three-dimensional structure diagram of the battery assembly provided by the embodiment of the present application.

[0018] Figure 2 It is an exploded view of a partial structure of the battery assembly provided by the embodiment of the present application.

[0019] Figure 3 It is a cross-sectional view of the explosion-proof valve and the flame arrester device of the battery assembly provided by the embodiment of the present application.

[0020] Figure 4 is Figure 3 The partial enlarged view at position A in

[0021] Figure 5 is the structural explosion view of the battery assembly provided by the embodiment of the present application from another angle.

[0022] Figure 6 is the three-dimensional structure schematic diagram of the electric vehicle provided by the embodiment of the present application. Specific embodiments

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the specific embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0024] As Figure 1 and Figure 2 shown, a battery assembly 100 includes a housing 11, a battery module 12, an explosion-proof valve 13, and a flame arrester 14. The battery module 12 is located inside the housing 11, and the housing 11 is used to protect the battery module 12. The explosion-proof valve 13 at least partially penetrates the housing 11, and the explosion-proof valve 13 is connected to the housing 11. When the pressure inside the housing 11 abnormally increases, the explosion-proof valve 13 provides a safety channel for releasing pressure. Specifically, the explosion-proof valve 13 can play a role in exhausting gas and preventing explosion during battery thermal runaway to protect the occupants. The flame arrester 14 is arranged around the explosion-proof valve 13, and the flame arrester 14 is connected to the housing 11. The flame arrester 14 can fully utilize heat transfer to reduce the temperature of combustible gas and prevent flames and metal particles from splashing outside the housing 11, thereby helping to improve the safety performance of the battery assembly 100.

[0025] In order to clearly illustrate the technical solution of the application, the front, rear, left, right, up, and down as Figure 1 shown are also defined. In the present application, the length direction of the battery assembly 100 refers to the above-mentioned front-rear direction, the width direction of the battery assembly 100 refers to the above-mentioned left-right direction, and the height direction of the battery assembly 100 refers to the above-mentioned up-down direction.

[0026] As Figure 2 and Figure 3As shown, as an implementation, the flame arrester 14 includes a first bottom plate 141, a filter plate 142, a second bottom plate 143, a heat dissipation plate 144, and an exhaust passage 145. The first bottom plate 141 is connected to the housing 11. An exhaust hole 1411 communicating with the exhaust passage 145 is formed on the first bottom plate 141. The explosion-proof valve 13 is at least partially located in the exhaust hole 1411. The filter plate 142 extends substantially along the opening direction of the exhaust hole 1411. The filter plate 142 surrounds to form the exhaust passage 145, and the exhaust passage 145 communicates with the exhaust hole 1411. One end of the filter plate 142 is connected to the first bottom plate 141, and the other end of the filter plate 142 is connected to the second bottom plate 143. Filter holes 146 communicating with the exhaust passage 145 are formed on the filter plate 142. The filter plate 142 is disposed around the exhaust hole 1411, and the exhaust hole 1411 communicates with the outside through the filter holes 146. The second bottom plate 143 covers one end of the filter plate 142 away from the first bottom plate 141, and the second bottom plate 143 is connected to the filter plate 142. The heat dissipation plate 144 is disposed between the first bottom plate 141 and the second bottom plate 143. The heat dissipation plate 144 extends substantially along the opening direction of the exhaust hole 1411. The heat dissipation plate 144 is fixedly connected to the first bottom plate 141, or the heat dissipation plate 144 is fixedly connected to the second bottom plate 143. A smoke exhaust gap 147 is formed between the heat dissipation plate 144 and the first bottom plate 141, or a smoke exhaust gap 147 is formed between the heat dissipation plate 144 and the second bottom plate 143. The heat dissipation plate 144 is disposed around the exhaust passage 145, and the exhaust passage 145 communicates with the outside through the smoke exhaust gap 147. Specifically, both the filter plate 142 and the heat dissipation plate 144 are located between the first bottom plate 141 and the second bottom plate 143. The first bottom plate 141 and the second bottom plate 143 block both ends of the filter plate 142 and form the above-mentioned exhaust passage 145. The exhaust passage 145 communicates with the inside of the housing 11 through the exhaust hole 1411, so that the gas in the housing 11 can enter the exhaust passage 145 through the guidance of the explosion-proof valve 13 and the exhaust passage 145. The gas stays briefly in the exhaust passage 145 and is then conveyed to the outside through the exhaust hole 1411. Among them, the heat dissipation plate 144 can block metal particles and play a role in cooling the gas, thereby preventing the flame and metal particles from splashing to the outside of the flame arrester 14. Through the above settings, the flame arrester 14 reduces the temperature of the combustible gas and prevents the flame and metal particles from splashing to the outside of the housing 11, which is beneficial to improving the safety performance of the battery assembly 100.

[0027] As an implementation, the filter plate 142 is arranged around the heat dissipation plate 144. Specifically, when the numbers of both the filter plate 142 and the heat dissipation plate 144 are one, the heat dissipation plate 144 is arranged in the exhaust passage 145. First, the combustible gas leaking inside and outside the housing 11 can be cooled, and then the low-temperature gas is discharged to the outside through the filter holes 146. At the same time, the heat dissipation plate 144 can block most of the metal particles to prevent the metal particles from blocking the filter holes 146. Through the above arrangement, the service life of the filter plate 142 can be improved. At the same time, the filter plate 142 can protect the heat dissipation plate 144, which is also beneficial to improving the service life of the heat dissipation plate 144.

[0028] As another implementation, the heat dissipation plate 144 is arranged around the filter plate 142. Specifically, when the numbers of both the filter plate 142 and the heat dissipation plate 144 are one, the heat dissipation plate 144 is arranged outside the exhaust passage 145. First, the combustible gas leaking inside and outside the housing 11 can be filtered to filter out the metal particles with larger volume, and then the filtered gas is cooled by the heat dissipation plate 144 so that the low-temperature gas is discharged to the outside. Through the above arrangement, the blockage of the smoke exhaust gap 147 by the metal particles with larger volume can be avoided, which is beneficial to improving the emission efficiency of the combustible gas. At the same time, the heat dissipation plate 144 can protect the filter plate 142 to prevent the filter holes 146 of the filter plate 142 from being blocked by external dust, which is also beneficial to improving the working efficiency of the filter plate 142.

[0029] Exemplarily, the range of the minimum distance D1 between the filter plate 142 and the heat dissipation plate 144 is from 1.5 mm to 7.5 mm. Specifically, the range of the minimum distance D1 between the filter plate 142 and the heat dissipation plate 144 is from 2.5 mm to 5.5 mm. More specifically, the range of the minimum distance D1 between the filter plate 142 and the heat dissipation plate 144 is 3.5 mm. Through the above arrangement, it can be avoided that the volume of the flame arrester 14 is too large due to the too large range of the minimum distance D1 between the filter plate 142 and the heat dissipation plate 144, so as to prevent the flame arrester 14 from occupying a large space, which is beneficial to improving the space utilization rate of the battery assembly 100. Also, it can be avoided that the metal particles are deposited between the filter plate 142 and the heat dissipation plate 144 due to the too small range of the minimum distance D1 between the filter plate 142 and the heat dissipation plate 144, so as to prevent the flame arrester 14 from not working properly, which is beneficial to improving the working efficiency of the flame arrester 14.

[0030] As an implementation, the filter plate 142 includes a first filter plate 1421 and a second filter plate 1422. The first filter plate 1421 is disposed outside the second filter plate 1422, and the heat dissipation plate 144 is located between the first filter plate 1421 and the second filter plate 1422. Specifically, both the first filter plate 1421 and the second filter plate 1422 function to filter metal particles and prevent fire. When the temperature of the combustible gas in the housing 11 is relatively high, it may cause the battery module 12 in the housing 11 to burn. When the battery module 12 burns, a large amount of smoke, flames, and metal particles will be generated. The first filter plate 1421 and the second filter plate 1422 can provide double protection to prevent the flames and metal particles from being discharged from the inside of the fire prevention device 14 to the outside. Through the above arrangement, the filtering ability and fire prevention ability of the fire prevention device 14 can be improved, which is beneficial to improving the overall performance of the fire prevention device 14. At the same time, the heat dissipation plate 144 located between the first filter plate 1421 and the second filter plate 1422 can efficiently reduce the temperature of the combustible gas, which is also beneficial to improving the cooling performance of the fire prevention device 14.

[0031] In this embodiment, a heat dissipation channel 148 is further formed inside the fire prevention device 14. The heat dissipation channel 148 is located between the first filter plate 1421 and the second filter plate 1422, and the filter holes 146 are communicated with the heat dissipation channel 148. Specifically, the heat dissipation channel 148 is arranged around the heat dissipation plate 144, and the smoke exhaust gap 147 is located inside the heat dissipation channel 148. The combustible gas can enter the heat dissipation channel 148 through the filter holes 146 on the second filter plate 1422, so that the combustible gas can contact the heat dissipation plate 144 in the heat dissipation channel 148 and be quickly cooled. The cooled combustible gas is then discharged to the outside through the filter holes 146 on the first filter plate 1421. Through the above arrangement, the length of the heat dissipation channel 148 is relatively long, which is beneficial to improving the heat dissipation ability of the fire prevention device 14. Moreover, the heat dissipation plate 144 is located inside the heat dissipation channel 148 to prevent the heat dissipation plate 144 from being exposed and damaged, which is also beneficial to extending the service life of the heat dissipation plate 144.

[0032] As Figure 4As shown, as an implementation manner, the second bottom plate 143 extends at least partially towards the first bottom plate 141 to form a limiting block 149. The limiting block 149 is located between the first filter plate 1421 and the second filter plate 1422. One end of the heat dissipation plate 144 away from the smoke exhaust gap 147 is fixedly connected to the limiting block 149. Specifically, the first filter plate 1421 and the second filter plate 1422 respectively abut against both sides of the limiting block 149. The limiting block 149 is at least partially recessed towards the end away from the smoke exhaust gap 147 to form a limiting groove 140. The heat dissipation plate 144 is clamped in the limiting groove 140 and fixedly connected to the limiting plate. Through the above settings, the limiting block 149 can improve the connection strength between the first filter plate 1421, the second filter plate 1422 and the heat dissipation plate 144, and thus is beneficial to improving the structural stability of the fire prevention device 14.

[0033] As Figure 5 shown, as an implementation manner, a smoke exhaust hole 111 is formed in the housing 11. The explosion-proof valve 13 is clamped in the smoke exhaust hole 111, and the exhaust volume of the smoke exhaust gap 147 is greater than or equal to the exhaust volume of the smoke exhaust hole 111. Specifically, when the pressure in the housing 11 is too high, the explosion-proof valve 13 will eject from the smoke exhaust hole 111, so that the smoke and dust in the housing 11 can be quickly discharged through the smoke exhaust hole 111. When the exhaust volume of the smoke exhaust gap 147 is too small, it may prevent the smoke and dust from being quickly discharged to the outside and hinder the heat dissipation of the housing 11, so as to prevent the housing 11 from exploding or self-igniting, thereby being beneficial to improving the safety performance of the battery assembly 100.

[0034] As Figure 3 shown, in this embodiment, along the extending direction of the exhaust hole 1411, the length between the first bottom plate 141 and the second bottom plate 143 is defined as the first length L1, and the length of the explosion-proof valve 13 is defined as the second length L2. The first length L1 is greater than the second length L2. Specifically, when the pressure in the housing 11 is too high, the explosion-proof valve 13 will eject from the smoke exhaust hole 111. Therefore, in this application, enough space is reserved between the first bottom plate 141 and the second bottom plate 143 to store the explosion-proof valve 13, so as to prevent the explosion-proof valve 13 from blocking the smoke exhaust hole 111, and thus is beneficial to improving the smoke exhaust efficiency of the smoke exhaust hole 111, and further beneficial to improving the safety performance of the battery assembly 100.

[0035] As Figure 5As shown, as an implementation, the housing 11 includes a plurality of first connection parts 112. The first connection parts 112 are arranged around the smoke exhaust hole 111. The first bottom plate 141 includes a plurality of second connection parts 1423. The plurality of second connection parts 1423 are arranged around the exhaust hole 1411. The plurality of first connection parts 112 are connected to the plurality of second connection parts 1423. Specifically, each first connection part 112 and each second connection part 1423 are connected by a fastener, so that the first bottom plate 141 and the housing 11 are fixed to the housing 11 by a plurality of fasteners. Through the above arrangement, the connection strength between the first bottom plate 141 and the housing 11 can be improved, which is beneficial to improving the connection stability between the fire prevention device 14 and the housing 11.

[0036] As Figure 6 shown, the present application further provides an electric vehicle 200, and the above battery assembly 100 can be applied to the electric vehicle 200. Specifically, the electric vehicle 200 includes a vehicle frame 21, a body covering 22, a running assembly 23, and a suspension assembly 24. The vehicle frame 21 constitutes the basic framework of the electric vehicle 200 and is used to support the body covering 22, the running assembly 23, and the suspension assembly 24. The body covering 22 is at least partially connected to the vehicle frame 21. The battery assembly 100 is at least partially arranged in the space formed by surrounding the vehicle frame 21. The body covering 22 covers the vehicle frame 21 and is used to isolate other components inside the vehicle frame 21 from the outside world, and at the same time protect the equipment and structure inside the vehicle. The running assembly 23 is used for the movement of the electric vehicle 200. The running assembly 23 is installed on the vehicle frame 21 through the suspension assembly 24. It should be noted that the electric vehicle 200 can be an electric bicycle, an electric motorcycle, an electric four-wheeler, etc.

[0037] It should be understood that for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present application.

Claims

1. A battery assembly, comprising: A housing; A battery module, which is installed in the housing; An explosion-proof valve, which is connected to the housing; A flame arrestor, which is connected to the housing; Characterized in that: The flame arrestor includes: A first bottom plate, a second bottom plate and a filter plate. The first bottom plate is connected to the housing, and exhaust holes are formed in the first bottom plate. At least a part of the explosion-proof valve is located in the exhaust holes; the filter plate extends substantially along the opening direction of the exhaust holes. One end of the filter plate is connected to the first bottom plate, and the other end of the filter plate is connected to the second bottom plate. The filter plate forms an exhaust passage, and the exhaust passage is communicated with the exhaust holes. Filter holes communicating with the exhaust passage are formed in the filter plate, and the exhaust holes are communicated with the outside through the filter holes.

2. The battery assembly according to claim 1, characterized in that, The flame arrestor further includes a heat dissipation plate, which is arranged between the first bottom plate and the second bottom plate. The heat dissipation plate extends substantially along the opening direction of the exhaust holes. The filter plate is fixedly connected to the first bottom plate, or the filter plate is fixedly connected to the second bottom plate.

3. The battery assembly according to claim 2, characterized in that, A smoke exhaust gap is formed between the heat dissipation plate and the first bottom plate, or a smoke exhaust gap is formed between the heat dissipation plate and the second bottom plate. The heat dissipation plate is arranged around the exhaust passage, and the exhaust passage is communicated with the outside through the smoke exhaust gap; The filter plate is arranged around the heat dissipation plate, or the heat dissipation plate is arranged around the filter plate. The range of the minimum distance between the filter plate and the heat dissipation plate is 1.5 mm to 7.5 mm.

4. The battery assembly according to claim 2, characterized in that, The filter plate includes a first filter plate and a second filter plate. The first filter plate is arranged outside the second filter plate, and the heat dissipation plate is located between the first filter plate and the second filter plate.

5. The battery assembly according to claim 4, characterized in that, A heat dissipation passage is further formed inside the flame arrestor. The heat dissipation passage is located between the first filter plate and the second filter plate, and the filter holes are communicated with the heat dissipation passage.

6. The battery assembly according to claim 5, characterized in that, At least a part of the second bottom plate extends towards the direction close to the first bottom plate to form a limiting block. The limiting block is located between the first filter plate and the second filter plate, and one end of the heat dissipation plate is fixedly connected to the limiting block.

7. The battery assembly according to claim 1, characterized in that, A smoke exhaust hole is formed in the housing, and the explosion-proof valve is clamped in the smoke exhaust hole. The flame arrestor further includes a heat dissipation plate, and a smoke exhaust gap is formed between the heat dissipation plate and the first bottom plate. The exhaust volume of the smoke exhaust gap is greater than or equal to the exhaust volume of the smoke exhaust hole.

8. The battery assembly according to claim 7, characterized in that, The housing includes a plurality of first connection parts, the first connection parts are arranged around the exhaust hole, the first bottom plate includes a plurality of second connection parts, the plurality of second connection parts are arranged around the exhaust vent, and the plurality of first connection parts are connected to the plurality of second connection parts.

9. The battery assembly according to claim 1, wherein Along the extending direction of the exhaust vent, the distance between the first bottom plate and the second bottom plate is greater than the length of the explosion-proof valve.

10. An electric vehicle, comprising: A frame; A body covering, at least part of the body covering is arranged on the frame; A running assembly, at least part of the running assembly is arranged below the frame; A suspension assembly, the running assembly is mounted to the frame through the suspension assembly; Characterized in that: The electric vehicle includes the battery assembly according to any one of claims 1 to 9, and at least part of the battery assembly is arranged in the space formed by surrounding the frame.

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