An explosion-proof battery box

Abstract

The present invention discloses an explosion-proof battery box, comprising an upper cover and a bottom shell. The bottom shell is provided with a plurality of partitions, which are hollow structures and are connected to each other to divide the bottom shell into a plurality of battery compartments. A heat insulation plate is installed in the battery compartment, and a connecting assembly and a first airbag are installed in the partition. The upper cover is detachably connected to the bottom shell through the connecting assembly. The heat insulation plate has a puncturer at one end close to the first airbag, and a through hole is provided on the partition at a position corresponding to the puncturer. The above-mentioned explosion-proof battery box is divided into a plurality of battery compartments by the partitions, so that the battery energy will not accumulate quickly, thereby reducing the risk of explosion. At the same time, the upper cover and the lower shell are detachably connected by the connecting assembly. When the pressure of the combustible gas is too high, the combustible gas pushes the puncturer to puncture the first airbag, causing the connecting assembly to fall off from the upper cover, so that the combustible gas can be quickly released, thereby avoiding the occurrence of explosion and buying time for the driver and passengers to evacuate to a safe place.

Description

Technical Field

[0001] The present invention relates to the technical field of battery boxes, in particular to an explosion-proof battery box. Background Art

[0002] In recent years, with the catalysis of my country's new energy vehicle industry policy, a large number of new energy vehicles have been put on the market, and the safety of vehicles has faced major challenges. In particular, once the lithium-ion battery box catches fire, the entire box of batteries will catch fire and be scrapped in the mildest case, and the vehicle will be ignited or even exploded in the worst case, posing a potential hazard to the driver and passengers of the vehicle. Many electric vehicle lithium-ion battery fire accidents have occurred at home and abroad, causing huge economic losses and casualties.

[0003] Lithium-ion battery box fires are generally caused by thermal runaway of lithium-ion batteries. After thermal runaway, lithium-ion batteries will release a large amount of flammable gas, liquid and solid mixture in the battery box. Under certain conditions, the mixture will burn or explode.

[0004] Existing battery boxes contain all batteries in a single space. When battery energy becomes uncontrollable, it quickly spreads to the batteries within this space, generating even greater uncontrollable energy and maximizing the risk. Furthermore, battery boxes are typically installed with screws. When batteries overheat, the large amount of flammable gas generated cannot be effectively released, causing the generated energy to rapidly accumulate, generating even greater energy potential. Under certain conditions, this energy can break through the screws or the box, resulting in an explosion. Summary of the Invention

[0005] Based on this, it is necessary to provide an explosion-proof battery box.

[0006] An explosion-proof battery box includes an upper cover and a bottom shell. The bottom shell is provided with a plurality of partitions. The plurality of partitions are hollow structures and are connected to each other to divide the bottom shell into a plurality of battery compartments. A heat insulation board is installed in the battery compartment. A connecting assembly and a first airbag are installed in the partition. The upper cover is detachably connected to the bottom shell via the connecting assembly. The heat insulation board has a puncture device at one end near the first airbag, and a through hole is opened on the partition at a position corresponding to the puncture device.

[0007] In one embodiment, the connecting assembly includes a buckle, which is rotatably mounted on the partition and has one end engaged in a first groove formed in the upper cover, and one end of the buckle is in contact with the first airbag.

[0008] In one embodiment, the connecting assembly includes a clamping member, which is rotatably mounted on the partition at both ends, with one end clamped in the second groove formed in the upper cover and the other end clamped on the first airbag.

[0009] In one embodiment, the explosion-proof battery box further includes a U-shaped flame-retardant plate, which is installed on the battery grid.

[0010] In one embodiment, a second air bag is installed on the top surface, the bottom surface, and the side surfaces connected to the top surface and the bottom surface respectively of the battery cell.

[0011] In one embodiment, the explosion-proof battery box further includes a connecting chain, and two ends of the connecting chain are respectively installed on the upper cover and the bottom shell.

[0012] In one embodiment, the puncture device has a spiral tip.

[0013] In one embodiment, the first airbag and the second airbag are made of PE material.

[0014] The above-mentioned explosion-proof battery box is divided into several battery cells by partitions, so that the battery energy will not accumulate quickly, reducing the risk of explosion; at the same time, the upper cover and the lower shell are detachably connected by a connecting assembly. When the combustible gas pressure is too high, the combustible gas pushes the puncturer to puncture the first airbag, causing the connecting assembly to fall off the upper cover, and the upper cover and the lower shell to automatically separate, so that the combustible gas can be quickly released, avoiding the occurrence of explosion, and also buying time for the driver and passengers to evacuate to a safe place, ensuring the safety of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an assembly diagram of an explosion-proof battery box according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 An assembly diagram of a bottom shell of an explosion-proof battery box according to an embodiment of the present invention;

[0017] Figure 3 for Figure 1 A cross-sectional view of an explosion-proof battery box according to an embodiment of the present invention;

[0018] Figure 4 for Figure 1 An enlarged view of part A of an explosion-proof battery box according to an embodiment of the present invention;

[0019] Figure 5 for Figure 1 An enlarged view of part B of an explosion-proof battery box according to an embodiment of the present invention;

[0020] Figure 6 for Figure 1 A structural diagram of a puncture device for an explosion-proof battery box according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figure 1 As shown, an explosion-proof battery box includes an upper cover 10 and a bottom shell 20. The bottom shell 20 has a plurality of partitions 21. The plurality of partitions 21 are hollow structures and are interconnected to divide the bottom shell 20 into a plurality of battery cells 30. A heat insulation board 31 is installed in the battery cell 30. A connecting assembly 40 and a first airbag 50 are installed in the partition 21. The upper cover 10 is detachably connected to the bottom shell 20 through the connecting assembly 40. The end of the heat insulation board 31 near the first airbag 50 has a puncture device 60, and a through hole is opened on the partition 21 at a position corresponding to the puncture device 60.

[0025] The upper cover 10 is mounted on the vehicle chassis, and several partitions 21 are hollow and interconnected. The first airbag 50 is mounted within the several partitions 21 and all are interconnected. When the battery pack in a battery compartment 30 overheats, the battery pack will emit flammable gas. When the pressure of the generated flammable gas is too high, it will push the puncturer 60 toward the first airbag 50 until the first airbag 50 is punctured. When the first airbag 50 on one side of a battery compartment 30 is punctured, because the first airbag 50 is interconnected as a whole, the entire first airbag 50 will deflate, and all connecting components 40 will fall off the upper cover 10, allowing the upper cover 10 and the bottom shell 20 to quickly separate and the flammable gas to be quickly discharged.

[0026] In this way, an explosion-proof battery box is provided, in which the battery box is divided into a plurality of battery cells 30 by the partition 21, so that the battery energy will not accumulate quickly, thereby reducing the risk of explosion; at the same time, the upper cover 10 and the lower shell 20 are detachably connected by the connecting assembly 40. When the pressure of the combustible gas is too high, the combustible gas pushes the puncturer 60 to puncture the first airbag 50, causing the connecting assembly 40 to fall off from the upper cover 10, and the upper cover 10 and the lower shell 20 to automatically separate, so that the combustible gas can be quickly released, thereby avoiding the occurrence of explosion, and buying time for the driver and passengers to evacuate to a safe place, thereby ensuring the safety of the driver and passengers.

[0027] Furthermore, in order to make the connecting assembly 40 include a buckle 41 , the buckle 41 is rotatably mounted on the partition 21 and one end is snapped into the first groove 11 opened in the upper cover 10 , and one end of the buckle 41 is against the first airbag 50 .

[0028] Example 1: When the battery pack in a certain battery cell 30 is overheated, the battery pack will emit flammable gas. When the pressure of the generated flammable gas is too high, it will push the puncture device 60 to move toward the first airbag 50 until the first airbag 50 is punctured. One end of the buckle 41 is against the first airbag 50. When the support of the first airbag 50 is lost, one end of the buckle 41 falls off from the upper cover 10 due to gravity, causing the upper cover 10 and the bottom shell 20 to be quickly separated, allowing the flammable gas to be quickly discharged.

[0029] In this way, through the setting of the buckle 41, when the first airbag 50 is punctured, the buckle 41 falls off the upper cover 10 due to the loss of support from the first airbag 50, so that the upper cover 10 and the bottom shell 20 are quickly separated, and the upper cover 10 and the bottom shell 20 are automatically separated, so that the combustible gas is quickly discharged, thereby ensuring the safety of the battery box.

[0030] Furthermore, the connecting assembly 40 includes a clamping member 42 , which is rotatably mounted on the partition 21 at both ends, with one end clamped in the second groove 12 provided in the upper cover and the other end clamped on the first airbag 50 .

[0031] Example 2: The clamping member 42 consists of two clamping parts, which are connected by a torsion spring. When the battery pack in a battery cell 30 is overheated, the battery pack will emit flammable gas. When the pressure of the generated flammable gas is too high, it will push the puncturer 60 to move toward the first airbag 50 until the first airbag 50 is punctured. The two clamping parts of the clamping member 42 clamp one end of the first airbag 50 and retract inward under the action of the torsion spring, and the other end detaches from the second groove 12, so that the upper cover 10 and the bottom shell 20 are quickly separated.

[0032] In this way, through the setting of the buckle 41, when the first airbag 50 is punctured, one end of the clamping member 42 loses the support of the first airbag 50 and the other end falls off the upper cover 10, so that the upper cover 10 and the bottom shell 20 are quickly separated, and the upper cover 10 and the bottom shell 20 are automatically separated, so that the combustible gas is quickly discharged, thereby ensuring the safety of the battery box.

[0033] Furthermore, in order to control the spread of flames, the explosion-proof battery box further includes a U-shaped flame-retardant plate 70 , which is mounted on the battery grid 30 .

[0034] In this way, the "U"-shaped flame retardant plate 70 is provided. When a fire occurs in the battery pack, the flame is ejected from the small hole opened in the middle of the flame retardant plate 70, thereby controlling the burning path of the flame and, to a certain extent, preventing the flame from burning toward other surrounding battery packs. The spread speed of the flame is effectively controlled, and time is bought for the evacuation of the driver and passengers.

[0035] Furthermore, in order to achieve a good shock absorption effect, second air bags 80 are installed on the top surface, the bottom surface, and the side surfaces connected to the top surface and the bottom surface respectively of the battery cell 30 .

[0036] Thus, by installing the second airbags 80 on the top surface, bottom surface, and side surfaces connected to the top surface and bottom surface of the battery cell 30, a good shock absorption effect can be achieved, effectively preventing the battery pack from being damaged due to vibration.

[0037] Furthermore, in order to avoid accidents caused by the separation of the bottom shell 20 , the explosion-proof battery box further includes a connecting chain 90 , the two ends of which are respectively mounted on the upper cover 10 and the bottom shell 20 .

[0038] In this way, after the upper cover 10 and the bottom shell 20 are separated, since the upper cover 10 is installed on the car, the upper cover 10 is always connected to the bottom shell 20 through the connecting chain 90, thereby preventing the bottom shell 20 from moving to other places due to external force, thereby causing other accidents.

[0039] Furthermore, in order to quickly pierce the first airbag 50 , the puncturer 60 has a spiral pointed cone.

[0040] In this way, there are multiple sharp cones on the puncture device 60, and any one of the sharp cones that touches the first airbag 50 can puncture the first airbag 50, so that the battery box can quickly complete the pressure relief.

[0041] Furthermore, the first airbag 50 and the second airbag 80 are made of PE material.

[0042] The melting point of PE material is relatively low, generally around 150 degrees. When the temperature of the battery pack rises or catches fire, after the first airbag 50 and the second airbag 80 are melted, the first airbag 50 and the second airbag 80 can also be burned through, so that the upper cover 10 and the bottom shell 20 are automatically separated. To a certain extent, it can ensure the safety of the battery box, delay the occurrence of explosion accidents, and provide sufficient time for the driver and passengers to evacuate.

[0043] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An explosion-proof battery box, characterized by: The device comprises an upper cover, a bottom shell, and a plurality of partitions in the bottom shell. The plurality of partitions are hollow and interconnected, dividing the bottom shell into a plurality of battery compartments. A heat shield is installed in each battery compartment. A connecting assembly and a first airbag are installed in each partition. The upper cover is detachably connected to the bottom shell via the connecting assembly. The heat shield has a puncture device at one end near the first airbag, and a through hole is formed on the partition at a position corresponding to the puncture device. The connecting assembly includes a buckle, which is rotatably mounted on the partition and has one end engaged in a first groove formed in the upper cover. One end of the buckle abuts against the first airbag. When the support of the first airbag is lost, the one end of the buckle falls off from the upper cover due to gravity. The connecting assembly includes a clamping member, which is rotatably installed on the partition on both sides, with one end clamped in the second groove opened in the upper cover, and the other end clamped on the first airbag. The two clamping parts of the clamping member clamp one end of the first airbag and retract inward under the action of the torsion spring, and the other end disengages from the second groove, so that the upper cover and the bottom shell are quickly separated.

2. The explosion-proof battery box according to claim 1, characterized in that: The explosion-proof battery box also includes a "U"-shaped flame retardant plate, which is installed on the battery grid.

3. The explosion-proof battery box according to claim 1, characterized in that: The top surface, the bottom surface, and the side surfaces respectively connected to the top surface and the bottom surface of the battery cell are installed with second air bags.

4. The explosion-proof battery box according to claim 1, characterized in that: The explosion-proof battery box further comprises a connecting chain, and two ends of the connecting chain are respectively mounted on the upper cover and the bottom shell.

5. The explosion-proof battery box according to claim 1, characterized in that: The puncture device has a spiral pointed cone.

6. The explosion-proof battery box according to claim 1, characterized in that: The first airbag and the second airbag are made of PE material.

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