CN210052768U

CN210052768U - Electric automobile battery safety device

Info

Publication number: CN210052768U
Application number: CN201920597439.5U
Authority: CN
Inventors: 朱卫华
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-02-11
Anticipated expiration: 2029-04-28

Abstract

The utility model relates to a new energy automobile field just discloses an electric automobile battery safety device, protective housing's material is fire-retardant material, the cap is installed at protective housing's top, a plurality of fin is evenly installed to protective housing's profile side, be the rectangle array on protective housing's the top surface and arrange a plurality of standing groove that is used for placing battery module, constitute the inside equipartition of cell wall of standing groove has put thermal radiation insulating layer. Place inside independent standing groove through battery module, accelerate unusual battery module's heat through graphite alkene heat dissipation membrane and spill, realize dispelling the heat fast at the cooling system who cooperates on the protective housing through the air-cooling device of battery package self-band, still surround independent standing groove with heat radiation insulating layer to prevent the heat to adjacent battery module department diffusion, avoid battery module in the chain reaction that leads to the thermal runaway behind the internal short circuit.

Description

Electric automobile battery safety device

Technical Field

The utility model relates to a new energy automobile field specifically is an electric automobile battery safety device.

Background

The electric automobile mainly adopts the electric drive's car as the name implies, supplies power to driving motor through the battery package, realizes the operation of electric motor car. In the high energy density battery developed for realizing high endurance, since the high energy density technology is difficult to ensure hundreds of percent of safety even at the mature stage of the technology, spontaneous combustion caused by thermal runaway of the battery still occurs, and therefore, the use safety of the battery pack is particularly important.

According to the product provided in patent document CN201420699001.5, the product effectively judges when the single battery in the battery pack is abnormal, and takes measures to switch the circuit in time to terminate the operation of the abnormal single battery, and uses the spare single battery to replace the abnormal single battery to continue the operation, and at the same time, the battery pack is not disconnected from the high-voltage circuit, so that the vehicle will not lose power driving. However, the technical scheme is that only the used battery cells are switched, the abnormal battery cells are not effectively processed, due to the fact that thermal runaway of the battery is not only caused by external short circuit, but also possibly caused by internal short circuit, if the thermal runaway is not effectively processed, the abnormal battery can generate a large amount of heat to further self-ignite, meanwhile, the generated heat radiation can also affect the peripheral batteries to form chain reaction, and the damage is extremely large.

SUMMERY OF THE UTILITY MODEL

To the problem, an object of the utility model is to provide an electric automobile battery safety device has high security.

The utility model discloses a realize that technical purpose adopts following technical scheme:

the utility model provides an electric automobile battery safety device, includes a plurality of wind balls that are used for the air inlet, the bottom of wind ball all is fixed in the cabin top and all communicates with the air inlet end of the inside first air-supply line in cabin, the air-out end and the noise reduction box intercommunication of first air-supply line.

The wind ball comprises a base with a circular structure, a plurality of supporting plates, a plurality of guide plates with circular structures and V-shaped cross sections, a protective net with a cylindrical structure and a sealing cover with an oval bottom, the bottom ends of the supporting plates and the top surface of the base are evenly welded near the inner circular arc, fixing grooves are machined in the outer edge of each guide plate, the guide plates are fixedly connected with the supporting plates through the fixing grooves, the adjacent guide plates after fixing are equal in distance, the protective net sleeves are arranged on the outer sides of the guide plates, the bottom ends of the protective nets are attached to the top surface of the base, the top ends of the protective nets are fixed with the sealing cover in a clamping mode, the sealing cover is connected with the top ends of the supporting plates through screws, and the conical structures at the bottom ends of the sealing cover are located in the middle of the tops of cylindrical.

The one end of making an uproar case falls is the cylinder structure, and the other end is the toper structure, it includes shell body and interior casing to fall the case of making an uproar, interior casing is located the inside of shell body, just it has non-Newton's fluid to fill between shell body and the interior casing, the air-out end of first air-supply line is tangent with the arc surface of making an uproar case upper cylindrical structure part, the toper structure end of making an uproar case is connected with the second air-supply line.

Preferably, the middle part of the top surface of the base is of a frustum-shaped structure, the supporting plate is fixedly mounted at the top of the frustum structure on the base, and the frustum structure on the base is located at the lower part of the inner side of the protective net.

Preferably, a fireproof air brake is installed on the first air inlet pipe, and the input end of the fireproof air brake is electrically connected with the output end of the external control system.

Preferably, the fire-fighting water pipe is installed to the tip of the last cylindrical structure part of noise reduction box, the last control valve that installs of fire-fighting water pipe, the wind cap of arc structure is installed to the end of intaking that fire-fighting water pipe and be located on interior casing inner wall.

Preferably, the second air inlet pipe is provided with an air purification system and a silencer.

Preferably, the base, the supporting plate, the guide plate, the protective net and the sealing cover are all made of stainless steel.

The utility model discloses possess following beneficial effect:

1. this electric automobile battery safety device, place inside independent standing groove through battery module, accelerate the heat effluvium of unusual battery module through graphite alkene heat dissipation membrane, and with on the heat direction standing groove body, because pass through the isolated layer separation heat transfer of heat radiation between the adjacent standing groove, make the heat can only transmit through each chamber way, the diffusion, thereby improve the heat exchange efficiency of the inside gas or the liquid of chamber way, not only prevented the heat to adjacent battery module department diffusion lead to the chain reaction of thermal runaway, and improved heat exchange efficiency, realize quick cooling, make battery module's security further obtain the guarantee.

2. This electric automobile battery safety device, through being greater than first chamber way internal diameter with the internal diameter of third chamber way, the internal diameter of water inlet connector is greater than the internal diameter of third chamber way for be used for refrigerated gas or liquid when first chamber way, second chamber way and fourth chamber way, because the reduction of chamber way internal diameter, make the velocity of flow of gas or liquid accelerate, and gas or liquid when the velocity of flow is very fast, refrigerated effect is better.

Drawings

Fig. 1 is a top view of a protective housing according to the present invention;

fig. 2 is a schematic structural view of the protective housing of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken at B-B of FIG. 2;

fig. 5 is a side view of the present invention;

FIG. 6 is a side view of the housing cover of the present invention;

fig. 7 is a second side view of the housing cover of the present invention.

In the figure: 1. a protective housing; 2. a shell cover; 201. a contact piece; 202. a binding post; 3. a heat sink; 4. a placement groove; 5. a thermal radiation insulating layer; 6. a cooling system; 601. a first channel; 602. a second channel; 603. a third channel; 604. a fourth channel; 605. water inlet connector.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-7, according to the utility model discloses an embodiment provides a pair of electric automobile battery safety device, including protective housing 1, protective housing 1's material is fire-retardant material, cap 2 is installed at protective housing 1's top, a plurality of fin 3 is evenly installed to protective housing 1's profile side, it arranges a plurality of standing groove 4 that is used for placing battery module to be rectangular array on protective housing 1's the top surface, the inside equipartition of cell wall that constitutes standing groove 4 has put thermal radiation isolated layer 5, cooling system 6 has been arranged around the standing groove to protective housing 1's inside.

The cap 2 is insulating material, and a plurality of is installed to the bottom of cap 2 and is used for electrically conductive contact piece 201, contact piece 201 with install the electrode adaptation on the battery module in standing groove 4, the top of cap 2 is provided with the terminal 202 that a plurality of and contact piece 201 electricity are connected.

The cooling system 6 comprises a first channel 601, a second channel 602, a third channel 603 and a fourth channel 604, wherein the first channel 601, the second channel 602 and the fourth channel 604 are parallel to the top surface of the protective shell 1, the third channel 603 is perpendicular to the top surface of the protective shell 1, the first channel 601, the second channel 602 and the third channel 603 are uniformly arranged in the wall of the placing groove 4, the fourth channel 604 is arranged in the bottom of the protective shell 1, the first channel 601 and the second channel 602 are vertically arranged, the first channel 601 and the second channel 602 which are mutually crossed form a cooling layer, each cooling layer formed by the first channel 601 and the second channel 602 is mutually parallel and has the same interval, the third channel 603 is uniformly arranged at the crossing position of the first channel 601 and the second channel 602 on each cooling layer and is communicated with the first channel 603, the bottom end of the third channel 603 is communicated with the two ends of the corresponding fourth channel 604, the third channels 603 on the same diagonal of the protective casing 1 and at the corners are all communicated with the water inlet connector 605.

Wherein, after the cap 2 and the protective housing 1 are assembled completely, the cap 2 and the protective housing 1 form a sealed cavity, thereby further enhancing the waterproof and dustproof requirements and avoiding directly exposing the battery module after the battery pack is damaged.

Wherein, all attach graphene heat dissipation film on the inner wall of standing groove 4 and the bottom of standing groove 4, utilize the graphene film to have high heat conductivity and super flexible characteristics concurrently, improve the heat dissipation of the inside battery module of standing groove 4 to difficult damaged.

The inner diameters of the first cavity channel 601, the second cavity channel 602 and the fourth cavity channel 604 are the same, the diameter of the third cavity channel 603 is 3 times of the diameter of the first cavity channel 601, the inner diameter of the water inlet connector 605 is larger than the inner diameter of the third cavity channel 603, and the cavity channels with different inner diameters are used for enabling gas or liquid used for cooling to be filled in the cavity channels, and ensuring that the liquid or the gas can perform sufficient heat exchange inside the cavity channels and take away heat.

Wherein, protective housing 1 and cap 2 are all installed in the inside of battery package, provide duplicate protection for battery module to the cooling system 6 on the inside air cooling system cooperation protective housing 1 of battery package uses, makes the heat that the battery produced effluvium fast.

Wherein, cooling system 6 is not linked together with the engine circulative cooling system on the car, because the coolant liquid among the engine circulative cooling system on the car has already cooled off the engine, consequently, the temperature of this coolant liquid can be higher, if reuse this coolant liquid in cooling system 6, not only be difficult to play better cooling effect, also make the quantity greatly increased of coolant liquid.

The water inlet connector 605 is communicated with the upper end of the corresponding third cavity 603, so that the cavity is filled with the water inlet connector 605 more easily when liquid is introduced, an air cavity cannot be generated in the cavity, and the condition of uneven heat dissipation is caused.

The working principle is as follows: when the battery pack cooling device is used, a battery module is placed in the placing groove 4, the shell cover 2 is covered, the contact piece 201 is made to be in contact with and close to an electrode on the corresponding battery module, the shell cover 2 is kept to be locked with the protection shell 1, at the moment, a circuit is connected with the corresponding binding post 202, power supply of the battery module can be achieved, the installed protection shell 1 is placed in a proper position in the battery pack and fixed, at the moment, one water inlet connector 605 on the protection shell 1 is connected with an external pipeline used for inputting cooled gas or liquid, the other water inlet connector 605 is connected with an external pipeline used for outputting cooled gas or liquid, when the battery module works normally, the set temperature is not reached, the cooling system 6 does not work, heat dissipation can be achieved only through an air cooling system in the battery pack, when the battery module is short-circuited, when heat release phenomenon still exists after the battery module for supplying power is switched, the cooling system 6 works immediately, the gas or liquid for cooling enters through a water inlet connector 605 and is filled with the first channel 601, the second channel 602, the third channel 603 and the fourth channel 604, because the inner diameter of the third channel 603 is larger than that of the first channel 601, and the inner diameter of the water inlet connector 605 is larger than that of the third channel 603, the gas or liquid for cooling is reduced when passing through the first channel 601, the second channel 602 and the fourth channel 604, the inner diameter of the channel is reduced, the flow rate of the gas or liquid is accelerated, the temperature of the gas or liquid for cooling is reduced, the cooling effect is improved, the heat dissipation is accelerated by the graphene heat dissipation film on the inner wall of the placing groove 4, the heat is guided to the body of the placing groove 4, and the heat transfer is isolated by the heat radiation isolation layer 5 between the adjacent placing grooves 4, so that the heat can only be transferred and diffused through each channel, therefore, the heat exchange efficiency of gas or liquid in the cavity is improved, the rapid and efficient cooling and heat dissipation are realized, and the chain reaction of thermal runaway caused by heat diffusion to adjacent battery modules is prevented.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an electric automobile battery safety device which characterized in that: the protective shell is made of flame-retardant materials, a shell cover is installed at the top of the protective shell, a plurality of radiating fins are evenly installed on the side edge of the outline of the protective shell, a plurality of placing grooves used for placing battery modules are arranged on the top surface of the protective shell in a rectangular array, heat radiation isolation layers are evenly distributed inside the groove walls forming the placing grooves, and a cooling system is arranged inside the protective shell around the placing grooves;

the shell cover is made of insulating materials, a plurality of contact pieces for conducting electricity are mounted at the bottom of the shell cover, the contact pieces are matched with electrodes on the battery module mounted in the placing groove, and a plurality of binding posts electrically connected with the contact pieces are arranged at the top of the shell cover;

the cooling system comprises a first cavity channel, a second cavity channel, a third cavity channel and a fourth cavity channel, the first cavity channel, the second cavity channel and the fourth cavity channel are parallel to the top surface of the protective shell, the third cavity channel is vertical to the top surface of the protective shell, the first cavity channel, the second cavity channel and the third cavity channel are uniformly distributed in the groove wall of the placing groove, the fourth cavity channel is arranged inside the bottom of the protective shell, the first cavity channel and the second cavity channel are vertically arranged, the first cavity channel and the second cavity channel which are mutually crossed form a cooling layer, the cooling layers formed by the first cavity channel and the second cavity channel are mutually parallel and have equal distance, a third cavity channel is uniformly arranged at the crossed part of the first cavity channel and the second cavity channel on each layer of cooling layer and is communicated with the third cavity channel, the bottom that the third chamber said all communicates with the both ends that correspond the fourth chamber said, the third chamber that just is located the corner on the same diagonal line of protective housing says all with the connector intercommunication of intaking.

2. The electric vehicle battery safety protection device of claim 1, characterized in that: and after the shell cover and the protection shell are completely assembled, the shell cover and the protection shell form a sealed cavity.

3. The electric vehicle battery safety protection device of claim 1, characterized in that: graphene heat dissipation films are attached to the inner wall of the placing groove and the bottom of the placing groove.

4. The electric vehicle battery safety protection device of claim 1, characterized in that: the internal diameter that first chamber said, second chamber said and fourth chamber said is the same, the diameter that the third chamber said is 3 times of the diameter that the first chamber said, the internal diameter of the water supply connector is greater than the internal diameter that the third chamber said.

5. The electric vehicle battery safety protection device of claim 1, characterized in that: the protection shell and the shell cover are both arranged in the battery pack.

6. The electric vehicle battery safety protection device of claim 1, characterized in that: the cooling system is not communicated with an engine circulating cooling system on the automobile.

7. The electric vehicle battery safety protection device of claim 1, characterized in that: and the water inlet connector is communicated with the upper end of the corresponding third cavity.