CN218165829U

CN218165829U - Battery package thermal runaway safety device

Info

Publication number: CN218165829U
Application number: CN202222539797.5U
Authority: CN
Inventors: 蒋立琴; 陈岩; 王记磊; 胡风; 何志辉; 林菁
Original assignee: Guangdong Province Zhuhai City Quality Measurement Supervision And Inspection Institute
Current assignee: Guangdong Province Zhuhai City Quality Measurement Supervision And Inspection Institute
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2022-12-30
Anticipated expiration: 2032-09-26

Abstract

The utility model aims at providing a simple structure, low, the convenient and good battery package thermal runaway safety device of protecting effect of maintenance of input cost. The utility model discloses a sink and set up the pond in the below ground, the both sides in pond all are provided with the support frame, be provided with in the pond and bear the bracket, it is located two to bear the bracket between the support frame, two the below of support frame all is provided with the pneumatic cylinder, the both ends that bear the bracket respectively with two support frame sliding fit, two all slide on the support frame be provided with it is connected guiding mechanism to bear the bracket, the output of pneumatic cylinder with guiding mechanism is connected and drives it carries out the action of going up and down to bear the bracket. The utility model discloses be applied to the technical field of battery package test.

Description

Battery package thermal runaway safety device

Technical Field

The utility model relates to a technical field of battery package test, in particular to battery package thermal runaway safety device.

Background

Lithium ion batteries are considered to be the most promising power sources for electric vehicles due to their high energy density, long cycle life, and wide operating environment. However, the commercialization of electric vehicles is hindered due to the problem of thermal runaway of lithium ion batteries. Therefore, it is very necessary to test and verify the thermal runaway of the lithium ion battery, especially for the lithium ion battery with high energy density.

Thermal runaway is caused by continuous exothermic side reactions between battery components, including decomposition and regeneration reactions at the Solid Electrolyte Interface (SEI), redox reactions between the electrolyte and the electrodes, reduction of the binder by the negative electrode material, and reactions between the positive and negative electrodes. The reaction that the temperature is suddenly increased due to thermal runaway is mainly that oxygen released from the anode diffuses to the cathode to cause severe oxidation-reduction reaction and generate huge heat.

At present, a battery pack thermal runaway and thermal diffusion test project is required to be tested and verified as a national mandatory standard (GB 38031-safety requirement of a power storage battery for an electric automobile), the verification is carried out in a heating or puncturing mode specified in the standard, and if the battery pack is designed to have defects, the battery pack is easy to smoke and catch fire in the test process, and explosion accidents can happen in severe cases. When the battery is in a fire accident, sand or a CO2 fire extinguishing agent and the like are used for fighting fire in the traditional method, and the effect of the fighting fire is not ideal due to the large energy of the battery pack. The most effective method in the industry today is to quickly place the battery pack in the water, and to accomplish this type of testing, a complete set of protective devices is required, given the heavy weight of the battery pack.

The invention patent with publication number CN 110596592B discloses a low-ground safety protection method for a battery pack thermal diffusion test, which adopts a sinking type battery pack thermal runaway test method; placing the battery pack on a liftable stainless steel structure platform for testing, wherein the stainless steel structure platform is at the highest position during testing and is exposed out of the ground; after the test is finished, the stainless steel structure platform descends until the battery pack is completely immersed in the sunken water tank, so that cooling, fire extinguishing, smoke extinguishing and safety isolation of the battery pack are realized.

Above-mentioned patent can provide important protection for the safety of battery package test, has effectively ensured experimental security. However, in the technical scheme adopted in the above patent, the stainless steel structure platform is lowered to the ground through the lifting mechanism, all lifting rods in the lifting mechanism which drive the stainless steel structure platform to lift are driven by the same motor to realize synchronous operation, the lifting mechanism specifically divides the lifting rods into two groups which are arranged at two sides of the pool and connected through synchronous driving shafts, the driving motors respectively drive the synchronous driving shafts at two sides through synchronous chains to realize synchronous driving of the lifting rods at two sides, and the lifting of the lifting rods is realized by matching of a worm and a turbine, namely the lifting is realized by a screw rod transmission structure; it can be seen that its transmission structure is comparatively complicated, and not only initial stage cost drops into highly, and the lifter directly supports stainless steel structural platform, need bear very big gravity when the battery package is arranged in above that, causes great burden to the screw-thread fit easily, also breaks down easily in the operation in later stage to required maintenance cost is high, maintains also comparatively inconveniently, in case structural damage appears then can only change the part, has the limitation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a simple structure, input cost low, maintain convenient and battery package thermal runaway safety device that protecting effect is good.

The utility model adopts the technical proposal that: the utility model discloses a sink and set up the pond in the below ground, the both sides in pond all are provided with the support frame, be provided with in the pond and bear the bracket, it is located two to bear the bracket between the support frame, two the below of support frame all is provided with the pneumatic cylinder, the both ends that bear the bracket respectively with two support frame sliding fit, two all slide on the support frame be provided with it is connected guiding mechanism to bear the bracket, the output of pneumatic cylinder with guiding mechanism is connected and drives it carries out the action of going up and down to bear the bracket.

Further, guiding mechanism includes lift diaphragm, fixed diaphragm, a plurality of leading wheel and a plurality of drive chain, the lift diaphragm is located the middle part and both ends of support frame respectively with two stand sliding fit of support frame, fixed diaphragm sets up the outside of support frame, the leading wheel rotates and sets up on the lift diaphragm, drive chain's middle part cooperation is taken and is put on the leading wheel and both ends respectively with bear the bracket and fixed diaphragm is connected.

Further, the support frame includes that vertical setting is in two of front and back end in the pond stand, two the last lower extreme of stand all is connected with the connection diaphragm, two the relative inboard and the relative outside of stand have been seted up respectively in perpendicular spout and perpendicular spout outward, the both ends of lift diaphragm are all rotated and are provided with first runner, first runner is located in the interior perpendicular spout and with the side slot face sliding fit of interior perpendicular spout, the pneumatic cylinder is located the below of lift diaphragm and output with the lift diaphragm is connected.

Further, the front end and the rear end of the two sides of the bearing bracket are both provided with mounting plates, one side of each mounting plate close to the corresponding stand column is rotatably provided with a second rotating wheel, and the second rotating wheels are located in the outer vertical sliding grooves and in sliding fit with the side groove faces of the outer vertical sliding grooves.

Furthermore, guard rails are arranged on the left side, the right side and the rear side of the pool and are connected with the adjacent support frames.

Further, the upper end of bearing the weight of the bracket is provided with places the board, place and seted up a plurality of sieve mesh of permeating water on the board.

Further, the pool wall and the pool bottom of the pool are both provided with concrete layers.

Furthermore, the same guide mechanism comprises two guide wheels and two transmission chains.

The utility model has the advantages that: the utility model discloses carry out the action of going up and down through two pneumatic cylinder direct drive drives bearing bracket at the during operation, guiding mechanism plays the guide effect to bearing bracket's lift action for bearing bracket's lift action is steady, if explosion or the combustion condition can be fast with the aquatic in battery package immerse the pond in battery package test procedure, stops the occurence of failure. Compared with the prior art, the utility model has the advantages that the whole structure is simple, the input cost is low, drive simple structure, it is convenient to maintain, still has fine protecting effect, guarantees the safety of tester, equipment.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is an exploded view of the present invention;

fig. 3 is a first exploded view of a portion of the structure of the present invention;

fig. 4 is a second exploded view of a portion of the structure of the present invention.

Detailed Description

As shown in fig. 1 to 4, in this embodiment, the utility model discloses a sink and set up pond 1 in the below ground, the both sides in pond 1 all are provided with support frame 2, be provided with in the pond 1 and bear bracket 3, it is located two to bear bracket 3 between the support frame 2, two the below of support frame 2 all is provided with pneumatic cylinder 4, bear bracket 3's both ends respectively with two 2 sliding fit of support frame, two all slide on the support frame 2 be provided with bear bracket 3 and be connected guiding mechanism 5, the output of pneumatic cylinder 4 with guiding mechanism 5 is connected and drives bear bracket 3 and carry out the action of going up and down. The water pool 1 is positioned below the ground, and tap water is filled in the water pool during testing; the two support frames 2 are arranged at the left side and the right side of the pool 1 and are used for supporting the bearing bracket 3, and the height of the support frames 2 is higher than the ground so that the bearing bracket 3 can be exposed out of the ground; the bearing bracket 3 is used for placing a battery pack, and the bearing bracket 3 is arranged between the two support frames 2 in a sliding way, so that the bearing bracket 3 can move up and down to sink the battery pack into the water pool 1 when needed; the two hydraulic cylinders 4 act simultaneously and are used for driving the bearing bracket 3 to lift so as to realize the movement of the battery pack; the two guide mechanisms 5 are used for guiding the lifting action of the bearing bracket 3, are directly connected with the hydraulic cylinder 4, and are driven by the hydraulic cylinder 4 during working so as to drive the bearing bracket 3 to move.

In this embodiment, the guide mechanism 5 includes a lifting transverse plate 51, a fixed transverse plate 52, two guide wheels 53 and two transmission chains 54, the lifting transverse plate 51 is slidably disposed in the middle of the support frame 2, and two ends of the lifting transverse plate 51 are respectively slidably engaged with the two upright posts 21 of the support frame 2, so as to be capable of moving up and down; the fixed transverse plate 52 is fixedly arranged at the outer side of the support frame 2, and the two guide wheels 53 are rotatably arranged on the lifting transverse plate 51; two ends of the two transmission chains 54 are respectively connected with the bearing bracket 3 and the fixed transverse plate 52, so that the bearing bracket 3 is connected with the fixed transverse plate 52, and the two transmission chains 54 bypass the two guide wheels 53, so that direct friction with the lifting transverse plate 51 can be avoided during movement, and abrasion is effectively reduced. When the lifting device is driven, the hydraulic cylinder 4 drives the lifting transverse plate 51 to move upwards, and the fixed transverse plate 52 is fixedly arranged, so that the bearing bracket 3 is lifted upwards by the force of the transmission chain 54, and the guide wheel 53 removes the sliding friction force between the guide wheel and the transmission chain 54 through rotation, so that the friction is reduced, and the lifting action is smooth and stable.

In this embodiment, the supporting frame 2 includes two upright posts 21 vertically disposed at the front and rear ends in the pool 1, the upper and lower ends of the two upright posts 21 are both connected with a connecting transverse plate 22, and the two upright posts 21 are both made of H-shaped steel, so that the opposite inner sides and the opposite outer sides of the upright posts 21 are provided with an inner vertical chute 23 and an outer vertical chute 24, the two ends of the lifting transverse plate 51 are both rotatably provided with first rotating wheels 55, the first rotating wheels 55 are located in the inner vertical chute 23 and are in sliding fit with the side groove surfaces of the inner vertical chute 23, when the lifting transverse plate 51 performs lifting action, the two first rotating wheels 55 slide along the two inner vertical chutes 23, that is, the inner vertical chute 23 provides a moving path for the lifting transverse plate 51 and can also perform a limiting and guiding function on the moving direction of the lifting transverse plate 51, thereby ensuring that the lifting transverse plate 51 performs vertical and vertical movement; the hydraulic cylinder 4 is located below the lifting transverse plate 51, and the output end of the hydraulic cylinder 4 is connected with the lifting transverse plate 51, so that when the output end of the hydraulic cylinder 4 extends out, the lifting transverse plate 51 is jacked up, the guide wheel 53 rotates, the transmission chain 54 is jacked up, the bearing bracket 3 is pulled to be lifted, and when the output end of the hydraulic cylinder 4 retracts, the bearing bracket 3 moves downwards depending on the self weight or the weight of a stacked battery pack, and then falls into the water pool 1.

In this embodiment, the front and rear ends of the two sides of the carrying bracket 3 are provided with mounting plates 6, that is, the number of the mounting plates 6 is four, and two mounting plates are arranged on the left and right sides of the carrying bracket 3; the mounting panel 6 is close to one side of stand 21 is rotated and is provided with second runner 7, second runner 7 is in outer vertical chute 24 and with the side groove face sliding fit of outer vertical chute 24, two second runner 7 is along the twice outer vertical chute 24 slides, promptly outer vertical chute 24 does bear bracket 3 provides the removal route and can also be right simultaneously bear the weight of the moving direction of bracket 3 and play the effect of spacing direction, guarantee bear bracket 3 and carry out vertical removal from top to bottom.

In this embodiment, guard rails 8 are disposed on the left side, the right side and the rear side of the pool 1, and the guard rails 8 are connected to the support frames 2. The protective guard 8 is used for protecting, so that people or objects can be prevented from falling into the water pool 1, and meanwhile, the strength of the support frame 2 can be enhanced by connecting the protective guard with the support frame 2.

In this embodiment, a placing plate 9 is disposed at the upper end of the bearing bracket 3, and a plurality of water permeable sieve pores are formed in the placing plate 9. The battery pack can be prevented from impacting water surface displacement when the descending speed is too high by the placing plate 9, the placing plate 9 is provided with a plurality of water permeable sieve pores for water permeation, and the speed of soaking the battery pack in pool water can be accelerated.

In this embodiment, the wall and the bottom of the pool 1 are both provided with concrete layers. Through setting up concrete layer can strengthen the intensity in pond 1 to make the guard effect better, and be favorable to using repeatedly.

It should be noted that the hydraulic cylinder 4 can be protected by a waterproof structure, and the hydraulic cylinder 4 can be sunk to be arranged on one side of the water pool 1 to avoid water inflow.

While the embodiments of the present invention have been described in terms of practical embodiments, they are not intended to limit the scope of the invention, and modifications of the embodiments and combinations with other embodiments will be apparent to those skilled in the art in light of the present description.

Claims

1. The utility model provides a battery package thermal runaway safety device, it sets up at subaerial pond (1) including sinking, the both sides in pond (1) all are provided with support frame (2), be provided with in pond (1) and bear bracket (3), it is located two to bear bracket (3) between support frame (2), its characterized in that: the two support frames (2) are provided with hydraulic cylinders (4) below, the two ends of the bearing bracket (3) are respectively in sliding fit with the two support frames (2), the two support frames (2) are provided with guide mechanisms (5) connected with the bearing bracket (3) in a sliding mode, and the output end of each hydraulic cylinder (4) is connected with the guide mechanisms (5) and drives the bearing bracket (3) to move up and down.

2. The battery pack thermal runaway safety guard of claim 1, wherein: guiding mechanism (5) are including lift diaphragm (51), fixed diaphragm (52), a plurality of leading wheel (53) and a plurality of drive chain (54), lift diaphragm (51) are located the middle part and both ends of support frame (2) respectively with two stand (21) sliding fit of support frame (2), fixed diaphragm (52) set up the outside of support frame (2), leading wheel (53) rotate the setting and are in on lift diaphragm (51), the middle part cooperation of drive chain (54) is taken and is put on leading wheel (53) and both ends respectively with bearing bracket (3) and fixed diaphragm (52) are connected.

3. The battery pack thermal runaway safety guard of claim 2, wherein: support frame (2) are in including vertical setting two of front and back end in pond (1) stand (21), two the last lower extreme of stand (21) all is connected with connection diaphragm (22), two interior perpendicular spout (23) and outer perpendicular spout (24) have been seted up respectively to the relative inboard and the relative outside of stand (21), the both ends of lift diaphragm (51) all rotate and are provided with first runner (55), first runner (55) are located in interior perpendicular spout (23) and with the side slot face sliding fit of interior perpendicular spout (23), pneumatic cylinder (4) are located the below and the output of lift diaphragm (51) with lift diaphragm (51) are connected.

4. The battery pack thermal runaway safety guard of claim 3, wherein: the front and rear ends of the two sides of the bearing bracket (3) are provided with mounting plates (6), the mounting plates (6) are close to one side of the upright post (21) is rotated to be provided with second rotating wheels (7), and the second rotating wheels (7) are located in the outer vertical sliding grooves (24) and in sliding fit with the side groove faces of the outer vertical sliding grooves (24).

5. The battery pack thermal runaway safety guard of claim 1, wherein: guard railings (8) are arranged on the left side, the right side and the rear side of the pool (1), and the guard railings (8) are connected with the support frames (2) which are close to each other.

6. The battery pack thermal runaway safety guard of claim 1, wherein: the upper end of the bearing bracket (3) is provided with a placing plate (9), and a plurality of water permeable sieve pores are formed in the placing plate (9).

7. The battery pack thermal runaway safety guard of claim 1, wherein: concrete layers are arranged on the wall and the bottom of the water pool (1).

8. The battery pack thermal runaway safety guard of claim 2, wherein: the same guide mechanism (5) comprises two guide wheels (53) and two transmission chains (54).