CN112366400A

CN112366400A - Battery tray, power battery package and vehicle

Info

Publication number: CN112366400A
Application number: CN201910675049.XA
Authority: CN
Inventors: 唐江龙; 朱燕; 鲁志佩; 熊柏钧; 易宁
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2021-02-12
Anticipated expiration: 2039-07-25
Also published as: CN112366400B

Abstract

The invention discloses a battery tray, a power battery pack and a vehicle, wherein the battery tray is provided with a containing cabin for containing a battery, the battery tray comprises a tray main body, at least one part of the tray main body is internally provided with a gas channel for prolonging the flow path of gas flow, the tray main body is provided with a gas inlet hole and a gas outlet hole, and the gas inlet hole is communicated with the gas outlet hole through the gas channel. According to the battery tray, the flow guide body is arranged, and the flow guide body can be used for guiding airflow to circulate in the gas channel in a roundabout mode, so that the flowing path of the airflow can be prolonged, the instantaneous pressure of the airflow is consumed, the temperature of the airflow is properly reduced, the battery tray has the functions of cooling and buffering, and the battery tray is protected, the damage of the high-temperature airflow to the battery tray can be reduced, and the stability and the safety of the structure of the battery tray can be improved.

Description

Battery tray, power battery package and vehicle

Technical Field

The invention relates to the technical field of batteries, in particular to a battery tray, a power battery pack and a vehicle.

Background

In the related art, the battery pack comprises batteries and a tray, the batteries are arranged in the tray, and when abnormal batteries release high-temperature gas, the high-temperature gas easily melts the battery tray, so that the overall structure of the battery pack is damaged, and the overall safety and stability are poor.

Disclosure of Invention

The invention provides a battery tray which has the advantages of high safety coefficient and strong stability.

The invention provides a power battery pack which comprises the battery tray.

The invention provides a vehicle which comprises the power battery pack.

According to the battery tray provided by the embodiment of the invention, the battery tray is provided with a containing cabin for containing a battery, the battery tray comprises a tray main body, at least one part of the tray main body is internally provided with a gas channel, the tray main body is provided with a gas inlet hole and a gas outlet hole, and the gas inlet hole is communicated with the gas outlet hole through the gas channel; the gas channel is also provided with a flow guide body, and the flow guide body is used for guiding the gas flow to circulate in a roundabout way in the gas channel.

According to the battery tray provided by the embodiment of the invention, the flow guide body is arranged, and the flow guide body can be used for guiding airflow to circulate in the gas channel in a roundabout manner, so that the flowing path of the airflow can be prolonged, the instantaneous pressure of the airflow is consumed, the temperature of the airflow is properly reduced, the battery tray has the functions of cooling and buffering, and the battery tray is protected, so that the damage of high-temperature airflow to the battery tray can be reduced, and the stability and the safety of the structure of the battery tray can be further improved.

In some embodiments of the invention, the tray body comprises a floor and a perimeter beam, the perimeter beam being disposed around the floor, the floor and the perimeter beam together defining a compartment for receiving a battery, the perimeter beam or the floor being at least partially hollow to form the gas channel.

In some embodiments of the invention, the pallet body further comprises a cross beam for reinforcing the pallet body, the cross beam being at least partially hollow and communicating with the hollow portion of the side beam or the bottom plate to form the gas channel.

In some embodiments of the present invention, the flow guiding body includes a flow guiding plate, the flow guiding plate includes a plurality of sub flow guiding plates, the plurality of sub flow guiding plates divide the gas channel into a plurality of sub gas channels, and the plurality of sub gas channels are communicated with each other.

According to some embodiments of the invention, a plurality of the sub-gas channels are connected in an S-shape.

In some embodiments of the present invention, the sub-diversion plate includes a first plate and a second plate, the first plate and the second plate are spaced from the inside of the tray body to the outside of the tray body and divide the gas channel into three sub-gas channels, and the three sub-gas channels include a first channel, a second channel and a third channel, and the first channel, the second channel and the third channel are sequentially disposed from the inside of the tray body to the outside of the tray body.

In some embodiments of the present invention, the first channel communicates with the receiving compartment through the air inlet hole, the first plate is provided with a plurality of first through holes, the second plate is provided with a plurality of second through holes, the first channel and the second channel communicate through the first through holes, the second channel and the third channel communicate through the second through holes, and the third channel communicates with an external space of the battery tray through the air outlet hole.

In some embodiments of the present invention, at least a portion of the air inlet holes are staggered with at least a portion of the first through holes, or at least a portion of the first through holes are staggered with at least a portion of the second through holes.

In some embodiments of the invention, a phase change material, a thermal insulation material or a porous adsorption material is disposed within the second channel.

In some embodiments of the present invention, in the inside-outside direction of the tray main body, a plurality of the sub-baffles protrude from one side of the tray main body and extend toward the other side of the tray main body and divide the gas channel into a plurality of sub-gas channels.

In some embodiments of the present invention, third through holes are provided on a plurality of the sub-deflectors, and the third through holes on two adjacent sub-deflectors are arranged in a staggered manner.

In some embodiments of the present invention, the sub-baffles include an inner end and an outer end, and the third through holes of two adjacent sub-baffles are respectively disposed at the inner end and the outer end of the sub-baffles.

The power battery pack comprises a plurality of single batteries, wherein each single battery comprises a single explosion-proof valve; the power battery pack further comprises a cover plate and the battery tray, wherein the cover plate is connected with the battery tray in a sealing mode and forms a sealed space for containing the battery together.

According to some embodiments of the invention, the unitary explosion vent is disposed at the air inlet.

According to the power battery pack provided by the embodiment of the invention, the flow guide body is arranged, and the flow guide body can be used for guiding airflow to circulate in the gas channel in a roundabout manner, so that the flowing path of the airflow can be prolonged, the instantaneous pressure of the airflow is consumed, the temperature of the airflow is properly reduced, the cooling and buffering effects are achieved, the battery tray is protected, the damage of the high-temperature airflow to the battery tray can be reduced, and the stability and the safety of the structure of the battery tray can be further improved.

The vehicle comprises the power battery pack.

According to the vehicle provided by the embodiment of the invention, the flow guide body is arranged, and the flow guide body can be used for guiding airflow to circulate in the gas channel in a roundabout manner, so that the flowing path of the airflow can be prolonged, the instantaneous pressure of the airflow is consumed, the temperature of the airflow is properly reduced, the cooling and buffering effects are achieved, the battery tray is protected, the damage of the high-temperature airflow to the battery tray can be reduced, and the stability and the safety of the structure of the battery tray can be further improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a side view of a power battery pack according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the power cell pack of FIG. 1 taken along the line A-A;

FIG. 3 is an enlarged view at B in FIG. 2;

FIG. 4 is an enlarged view at C in FIG. 2;

fig. 5 is a partial schematic view of a battery tray according to an embodiment of the present invention, in which a first air outlet and a second air outlet are in an open state;

fig. 6 is a sectional view of the battery tray of fig. 5 taken along the direction D-D;

FIG. 7 is a schematic view of the structure of the body portion of FIG. 6;

FIG. 8 is a schematic view of the movable seal and the elastic member of FIG. 6;

fig. 9 is a partial schematic view of a battery tray according to an embodiment of the present invention, in which a first air outlet and a second air outlet are in a closed state;

fig. 10 is a sectional view of the battery tray of fig. 9 taken along the direction E-E;

fig. 11 is a partial schematic view of a battery tray according to another embodiment of the present invention.

Reference numerals:

a power battery pack 1000, a battery tray 100,

the containing compartment 1, the tray main body 2, the bottom plate 21, the side beams 22,

the gas channel 3, the first channel 31, the second channel 32, the third channel 33,

flow conductor 34, flow guide 341, first plate 342, second plate 343, sub-gas passages 35,

an air inlet hole 41, an air outlet hole 42, a first through hole 43, a second through hole 44, a third through hole 45,

the bag body one-way explosion-proof valve 5, the main body part 51,

a first drum segment 511, a second drum segment 512, a first fold 513,

a second flap 514, a first exhaust opening 515, a second exhaust opening 516,

the movable sealing portion 52, the first sealing portion 521,

the second sealing part 522, the connecting rod 523, the elastic member 524,

a battery 200.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A battery tray 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the battery tray 100 is provided with a receiving compartment 1 for receiving a battery 200, the battery tray 100 includes a tray main body 2, at least a portion of the interior of the tray main body 2 is formed with a gas passage 3, the tray main body 2 has a gas inlet hole 41 and a gas outlet hole 42, the gas inlet hole 41 communicates with the gas outlet hole 42 through the gas passage 3; a flow guiding body 34 is further arranged in the gas channel 3, and the flow guiding body 34 is used for guiding the gas flow to circulate in a circuitous way in the gas channel 3.

It is understood that when an abnormal problem (e.g., short circuit) occurs in the battery 200, a high-temperature air flow is easily generated, and this air flow needs to be discharged out of the battery tray 100 in time so as not to damage other batteries 200 in a normal state. In the present invention, the air flow generated from the abnormal battery 200 may enter the gas channel 3 through the air intake hole 41, and then be discharged out of the battery tray 100 through the air discharge hole 42 of the gas channel 3. The gas flow may be a flame, smoke or gas, but may also be a mixture of flame, smoke and gas.

Wherein, at least a part of the tray main body 2 is internally formed with a gas passage 3. It is to be understood that the gas passages 3 may be formed only in some of the components of the tray main body 2, or the gas passages 3 may be formed in all of the components of the tray main body 2.

According to the battery tray 100 of the embodiment of the invention, by arranging the guide body 34, the guide body 34 can be used for guiding the airflow to circulate in the gas channel 3 in a roundabout manner, so that the flowing path of the airflow can be prolonged, the instantaneous pressure of the airflow is consumed, the temperature of the airflow is properly reduced, the cooling and buffering effects are achieved, the battery tray is protected, the damage of the high-temperature airflow to the battery tray 100 can be reduced, and the stability and the safety of the structure of the battery tray 100 can be further improved.

In some embodiments of the present invention, as shown in fig. 1 and 2, the tray main body 2 includes a bottom plate 21 and a side beam 22, the side beam 22 is disposed around the bottom plate 21, the bottom plate 21 and the side beam 22 together define a receiving compartment 1 for receiving the battery 200, and the side beam 22 or at least a part of the bottom plate 21 is hollow to form the gas channel 3. From this, can simplify the complexity of tray main part 2 structure, reduce the manufacturing degree of difficulty of tray main part 2, promote tray main part 2's production efficiency, reduce tray main part 2's manufacturing cost.

In some embodiments of the invention, the pallet body 2 further comprises a cross beam for reinforcing the pallet body 2, at least part of the cross beam being hollow and penetrating the hollow part of the side beam 22 or the bottom plate 21 to form the gas channel 3. From this, can promote tray main part 2's structural strength, promote the reliability of tray main part 2 work, can also prolong tray main part 2's life simultaneously.

The specific structure of current carrier 34 is not particularly limited, and it is within the scope of the present disclosure to enable the gas flow to circulate in a circuitous manner in gas channel 3.

In some embodiments of the present invention, as shown in fig. 11, the baffle 34 includes a baffle 341, and the baffle 341 includes a plurality of sub-baffles, the plurality of sub-baffles divides the gas channel 3 into a plurality of sub-gas channels 35, and the plurality of sub-gas channels 35 are communicated with each other.

It is understood that when the battery 200 fails to release high temperature air flow, the high temperature air flow may pass through the plurality of sub-air channels in sequence, and the temperature and pressure of the air flow may gradually decrease as the air flow moves along the plurality of sub-air channels. From this, can suitably reduce the direct impact to the lateral wall of battery tray 200 of the high-pressure air current of high temperature, and then can promote the life of the lateral wall of battery tray 200, guarantee the stability of the lateral wall structure of battery tray 200.

According to some embodiments of the present invention, as shown in fig. 4 and 11, several sub-gas channels are connected in an S-shape. Therefore, the exhaust path of the airflow in the air channel 3 can be prolonged to the maximum extent, the temperature of the airflow is reduced, the finally exhausted gas to the outside can be reduced to the temperature harmless to the whole vehicle and members, and the high-temperature gas is prevented from entering the outside to cause secondary damage.

The position where the deflector 341 is provided is not particularly limited in this application. In some embodiments of the present invention, as shown in fig. 3 and 4, the sub-baffle includes a first plate 342 and a second plate 343, the first plate 342 and the second plate 343 are spaced from the inside of the tray body 2 (the inside shown in fig. 3) to the outside of the tray body 2 (the outside shown in fig. 3) and divide the gas channel 3 into three sub-gas channels, and the three sub-gas channels include a first channel 31, a second channel 32, and a third channel 33, and the first channel 31, the second channel 32, and the third channel 33 are sequentially disposed from the inside of the tray body 2 to the outside of the tray body 2. Wherein, the inside of tray main part 2 is the side of tray main part 2 near battery or holding cabin 1, and the outside of tray main part 2 is the side of tray main part 2 that deviates from the battery.

It can be understood that the first channel 31, the second channel 32 and the third channel 33 are provided, on one hand, the exhaust path of the air flow can be extended, and the temperature of the air flow is reduced, on the other hand, the first plate 342 and the second plate 343 can play a role in isolating heat propagation, the high-temperature air flow entering the second channel 32 from the first channel 31 can reduce the propagation of heat to other batteries of the accommodation compartment 1, and avoid chain thermal runaway caused by thermal diffusion, and again, due to the action of the first plate 342 and the second plate 343, the air flow generated by an abnormal battery cannot generate direct hedging on the outer side wall of the tray body 2, and damage to the battery tray 100 due to the hedging is reduced, thereby further improving the structural stability and safety of the battery tray 100 (refer to fig. 2), and the maintenance of the battery tray 100 is convenient.

In some embodiments of the present invention, as shown in fig. 3 and 4, the first channel 31 communicates with the receiving chamber 1 through the air inlet hole 41, the first plate 342 is provided with a plurality of first through holes 43, the second plate 343 is provided with a plurality of second through holes 44, the first channel 31 and the second channel 32 communicate through the first through holes 43, the second channel 32 and the third channel 33 communicate through the second through holes 44, and the third channel 33 communicates with the external space of the battery tray 100 (refer to fig. 2) through the air outlet hole 42.

For example, in the embodiment shown in fig. 3 and 4, a plurality of intake holes 41 are provided, the plurality of intake holes 41 correspond to the plurality of cells 200 one-to-one, the plurality of intake holes 41 are provided inside the first passage 31, the second passage 32, and the third passage 33 are sequentially stacked in the direction from inside to outside, the right end of the first plate 342 is provided with a first through hole 43, the left end of the second plate 343 is provided with a second through hole 44, and the right side of the top end of the third passage 33 is provided with an exhaust hole 42.

Thus, the airflow sequentially flows through the first channel 31, the third channel 33 and the second channel 32, the flow direction of the airflow in the first channel 31 is from left to right, the flow direction of the airflow in the second channel 32 is from right to left, and the flow direction of the airflow in the third channel 33 is from left to right.

In some embodiments of the present invention, at least some of the air intake holes 41 are staggered with at least some of the first through holes 43, or at least some of the first through holes 43 are staggered with at least some of the second through holes 44. It will be appreciated that the air flow enters the first passage 31 through the air inlet hole 41, and flows along the first passage 31 with a distance and then enters the second passage 32 from the first through hole 43. At least part of the air inlet holes 41 and at least part of the first through holes 43 are arranged in a staggered mode, the distance between the air inlet holes 41 and the first through holes 43 can be prolonged, so that the flowing distance of the air flow in the first channel 31 can be increased, and the processing effect of the first channel 31 on the air pressure and the temperature of the air flow can be improved.

Similarly, the air flow enters the second channel 32 through the first through hole 43, and enters the third channel 33 from the second through hole 44 after flowing a distance along the first through hole 43. At least part of the first through holes 43 and at least part of the second through holes 44 are arranged in a staggered mode, the distance between the first through holes 43 and the second through holes 44 can be prolonged, the flowing distance of the air flow in the second channel 32 can be increased, and the processing effect of the second channel 32 on the air pressure and the temperature of the air flow can be improved.

Of course, the invention is not limited thereto, and any scheme that can ensure the path of the air flow discharged from a part of the unit cells 200 to be extended is within the scope of the present application.

In some embodiments of the present invention, as shown in fig. 2 and 4, a phase change material, a thermal insulation material, or a porous adsorbent material is disposed within the second channel 32. The phase change material can absorb the heat in the gas channel 3 rapidly, so that the temperature in the gas channel 3 can be reduced rapidly, the heat in the gas channel 3 is prevented from being too high and generating adverse effects on other batteries 200, other batteries 200 can be protected, and the working safety of the battery tray 100 can be improved. The heat insulating material can isolate the inner wall of the gas passage 3 from the high-temperature gas flow to form an effective heat blocking layer and a fire blocking layer, thereby enhancing the stability of the gas passage 3. The porous adsorption material can adsorb particulate matters in smoke, avoids toxic smoke from being discharged to the outdoor environment, and has the advantages of safety and environmental protection.

It should be noted that the damaged deflector 341 is easy to repair, but the sidewall of the tray main body 2 is damaged, and the repair cost is high. When the air enters the first channel 31 from the air inlet hole 41, the air is not directly sprayed on the inner side wall of the tray main body 2, the phase-change material, the heat-insulating material or the porous adsorption material is arranged in the second channel 32, and when the air flow enters the third channel 33, the damage to the outer side wall of the tray main body 2 is reduced.

In some embodiments of the present invention, as shown in fig. 11, in the inside-outside direction of the tray main body 2, a plurality of sub-baffles protrude from one side of the tray main body 2 and extend toward the other side of the tray main body 2 and divide the gas channel 3 into a plurality of sub-gas channels 35. It is understood that when the battery 200 (see fig. 1) fails to release a high temperature air flow, the high temperature air flow may pass through the plurality of sub-gas channels 35 in sequence, and the temperature and pressure of the air flow may gradually decrease as the air flow moves along the plurality of sub-gas channels 35. From this, can reduce the direct offset with the lateral wall of battery tray 200 of the high-pressure air current of high temperature, and then can promote the life of the lateral wall of battery tray 200, guarantee the stability of the lateral wall structure of battery tray 200.

It should be noted that the part marked F in fig. 11 may be an inner side wall of the tray main body 2, and specifically, a plurality of air inlet holes 41 (only one is shown in the figure) may be disposed on F. Of course, the present invention is not limited thereto and F may also be a part of current carrier 34.

In some embodiments of the present invention, as shown in fig. 11, third through holes 45 are provided on a plurality of sub-deflectors, and the third through holes 45 on two adjacent sub-deflectors are arranged in a staggered manner. It is understood that when the battery 200 is out of order to release high-temperature air flow through the third through holes 45 of the plurality of sub-baffles, the flow path of the air flow is formed in an S-shape, and thus, the flow path of the air flow can be extended such that the temperature and pressure of the air flow can be lowered.

In some embodiments of the present invention, as shown in fig. 11, the sub-baffles include an inner end (a lower end as shown in fig. 1) and an outer end (an upper end as shown in fig. 1), and the third through holes of two adjacent sub-baffles are respectively disposed at the inner end and the outer end of the sub-baffles. Therefore, the complexity of the structure of the sub-guide plate can be reduced, and the manufacturing cost of the sub-guide plate is favorably reduced. In addition, the flow path of the airflow can be further prolonged, so that the effects of airflow temperature reduction and pressure reduction are better. The inner end refers to an end (lower end as shown in fig. 1) of the sub-deflector close to the accommodation compartment 1, and the outer end refers to an end (upper end as shown in fig. 1) of the sub-deflector far from the accommodation compartment 1.

According to some embodiments of the invention, at least part of the inner wall of the gas channel 3 is provided with a coating. By providing a coating, the coating can pre-treat the gas stream (e.g., cool or adsorb particulate matter) as it flows through the coating. Thereby, the influence of the gas flow on the gas channel 3 and the battery 200 in the normal state can be reduced, thereby further improving the reliability and safety of the operation of the battery tray 100.

In some embodiments of the invention, the coating is a barrier layer. The isolation layer has thermal-insulated and the effect that separates the fire, when the flame of high temperature, smog or gaseous inflow gas channel 3 back, the isolation layer can prevent that the heat from transmitting other spare parts in other battery 200 monomer and the power battery package 1000 through gas channel 3's inner wall, can prevent that spare part in the battery tray 100 from receiving the damage, also can protect other batteries 200 in the battery tray 100, thereby can avoid battery tray 100 to take place conflagration and thermal runaway, and then the safety in utilization of promotion battery tray 100 that can be further.

In some embodiments of the invention, the isolation layer is a thermally expansive layer. After flame, smog or gas of high temperature got into gas passage 3, the thermal expansion layer is heated and can be expanded fast, can form effectual thermal barrier layer and fire barrier layer at gas passage 3's inner wall to can make gas passage 3 have better thermal-insulated function.

In some embodiments of the invention, the thermally expandable layer is a thermally expandable graphite layer or a thermally expandable vermiculite layer. The heat-expandable graphite layer or the heat-expandable vermiculite layer can be coated on the inner wall of the gas channel 3, and under the condition that the temperature of the gas flow is lower (less than or equal to 300 ℃), the gas channel 3 only serves as an exhaust channel to collect the exhausted gas flow in time. When the temperature of the airflow is higher (more than 300 ℃), the thermal expansion graphite layer or the thermal expansion vermiculite layer is heated to expand rapidly to form an effective thermal barrier layer and a fire barrier layer, so that the diffusion of high temperature in the battery tray 100 can be effectively avoided.

In some embodiments of the invention, the coating is an adsorbent layer. The adsorbed layer can adsorb the particulate matter in the smog, avoids these poisonous smog to arrange to outdoor environment in, has the advantage of safety and environmental protection. In some embodiments of the invention, the coating is a silica gel layer, an activated carbon layer, or a ceramic particle layer. The silica gel layer, the activated carbon layer and the ceramsite layer have excellent physical adsorption performance, and the silica gel layer, the activated carbon layer and the ceramsite layer are low in cost. In addition, the silica gel layer, the activated carbon layer and the ceramic particle layer are stable in chemical properties, not prone to corrosion of acid and alkali and long in service life.

In some embodiments of the invention, the coating is a layer of phase change material. When the air pressure and the temperature in the first channel 31 change, the phase change material layer can generate phase change and rapidly absorb the heat in the gas channel 3, so that the temperature in the gas channel 3 can be rapidly reduced, the phenomenon that the heat in the gas channel 3 is too high to generate adverse effects on other batteries 200 is avoided, other batteries 200 can be protected, and the working safety of the battery tray 100 can be improved.

It should be noted that the phase-change material may be a cooling liquid, such as transparent, colorless, odorless, and insulating liquid-state environmental-friendly fire-extinguishing agent perfluorohexanone. When the high-temperature airflow is sprayed out of the exhaust hole 42 and enters the air channel 3, the perfluorohexanone liquid with the boiling point of only about fifty degrees can be evaporated, heat is absorbed in the evaporation process, the evaporation heat is only about 1/25 of water, and the purpose of quickly taking away heat and reducing the temperature is achieved. Besides the liquid coolant such as perfluorohexanone, various phase change materials can be selected, and the environment-friendly materials are standard in that the final heating phase is changed into a gas state, the latent heat is large, and the triggering temperature is about 200 ℃.

In some embodiments of the invention, at least a portion of the air intake holes 41 are opposite the coating. Thus, it is possible to ensure that the high-temperature gas, flame, entering the gas channel 3 from the gas inlet holes 41 can come into contact with the coating layer, and it is possible to better prevent heat from being transferred to other batteries 200 in the battery tray 100. And, the gas flow can be effectively prevented from directly breaking through the inner wall of the entire gas passage 3.

In some embodiments of the invention, as shown in fig. 2 and 3, the bag body one-way explosion-proof valve 5 is arranged at the exhaust hole 42. The bag body one-way explosion-proof valve 5 can block the air vent 42, flame, smoke or gas exhausted from the battery 200 enters through the air inlet 41 and is accumulated in the gas channel 3, and when the air pressure in the gas channel 3 reaches a certain value, the bag body one-way explosion-proof valve 5 is opened to exhaust the flame, smoke or gas accumulated in the gas channel 3.

In some embodiments of the invention, as shown in fig. 5 and 6, the inclusion one-way burst valve 5 comprises: the main body 51 (see fig. 7) and the movable sealing portion 52 (see fig. 8), the main body 51 having a first exhaust port 515, a second exhaust port 516 and an exhaust passage communicating the first exhaust port 515 and the second exhaust port 516, the movable sealing portion 52 being movable relative to the main body 51, the movable sealing portion 52 including a first sealing portion 521, a second sealing portion 522 and a connecting rod 523 connected between the first sealing portion 521 and the second sealing portion 522, the first sealing portion 521 being adapted to open or close the first exhaust port 515 (see fig. 6 and 10), and the second sealing portion 522 being adapted to open or close the second exhaust port 516.

It is understood that the flames, smoke, or gas discharged from the abnormal battery 200 enters through the gas inlet hole 41 and is accumulated in the gas channel 3, and when the gas pressure in the gas channel 3 reaches a certain value, the gas flow of high pressure may push the movable sealing portion 52 to open the first and second exhaust ports 515 and 516 (refer to fig. 9 and 10), and the flames, smoke, or gas accumulated in the gas channel 3 is discharged through the first and

second exhaust ports

515 and 516.

In some examples of the present invention, the first sealing part 521, the second sealing part 522 and the connecting rod 523 are an integrally formed part. From this, integrated into one piece's structure not only can guarantee first sealing 521, the structure of second sealing 522 and connecting rod 523, the stability of performance, and convenient shaping, it is simple to make, and unnecessary assembly part and connection process have been saved, the assembly efficiency of first sealing 521, second sealing 522 and connecting rod 523 has been improved greatly, the connection reliability of first sealing 521, second sealing 522 and connecting rod 523 has been guaranteed, moreover, integrated into one piece's structure's bulk strength and stability are higher, it is more convenient to assemble, the life-span is longer.

In some embodiments of the present invention, as shown in fig. 6 and 7, the main body portion 51 includes: the first cylinder section 511, the second cylinder section 512, the first folded part 513 and the second folded part 514, and a gap is formed between the outer circumferential wall of the first sealing part 521 and the inner circumferential wall of the first cylinder section 511. Thereby, it is ensured that the first sealing part 521 can move relative to the first barrel section 511, and at the same time, friction between the first sealing part 521 and the first barrel section 511 during the movement can be reduced.

The first sealing part 521 moves in the first cylinder section 511, the second cylinder section 512 is connected and communicated with the first cylinder section 511, the second cylinder section 512 and the first cylinder section 511 define an exhaust channel, the edge of the first cylinder section 511 far away from the second cylinder section 512 is folded towards the inside of the exhaust channel to form a first folding part 513, and the edge of the first folding part 513 far away from the first cylinder section 511 forms a first exhaust port 515. It is understood that the first exhaust opening 515 may be defined by the first flap 513, thereby simplifying the difficulty of forming the first exhaust opening 515 and reducing the manufacturing cycle time of the first exhaust opening 515.

The first sealing portion 521 is adapted to abut against the first folding portion 513, the edge of the second tube section 512 far away from the first tube section 511 is folded toward the inside of the exhaust passage to form a second folding portion 514, the edge of the second folding portion 514 far away from the second tube section 512 forms a second exhaust port 516, and the second sealing portion 522 is adapted to abut against the second folding portion 514. It is understood that the second vent 516 may be defined by the second flap 514, thereby simplifying the difficulty of forming the second vent 516 and reducing the manufacturing cycle time of the second vent 516.

In some embodiments of the present invention, as shown in fig. 6 and 8, the cross-section of the second sealing portion 522 is gradually increased in a direction from the first exhaust port 515 to the second exhaust port 516. It is understood that the second sealing portion 522 may close the second exhaust port 516, and the cross section of the second exhaust port 516 is gradually reduced in a direction from the first exhaust port 515 to the second exhaust port 516. Thereby, the sealing effect of the second sealing portion 522 on the second exhaust port 516 can be improved. In addition, in the process of opening or closing the second exhaust port 516 by the second sealing part 522, the inner circumferential wall of the second exhaust port 516 does not interfere with the outer circumferential wall of the second sealing part 522, so that the smoothness of opening or closing the second exhaust port 516 by the second sealing part 522 can be improved.

In some embodiments of the invention, as shown in fig. 6 and 8, the enclosure one-way explosion prevention valve 5 (see fig. 5) further comprises: the elastic element 524 is located in the exhaust passage, the connecting rod 523 is sleeved with the elastic element 524, and the elastic element 524 is sandwiched between the first sealing portion 521 and the second folding portion 514 to normally push the first sealing portion 521 to close the first exhaust port 515. It is understood that the flame, smoke or gas discharged from the abnormal battery 200 enters through the gas inlet hole 41 and accumulates in the gas channel 3, and when the gas pressure in the gas channel 3 is greater than the elastic force of the elastic member 524 applied to the movable sealing portion 52, the movable sealing portion 52 may open the first exhaust port 515 and the second exhaust port 516; when the gas pressure in the gas passage 3 is smaller than the elastic force of the elastic member 524 applied to the movable sealing portion 52, the movable sealing portion 52 may close the first exhaust port 515 and the second exhaust port 516. Thereby, the automatic restoration of the movable seal portion 52 can be realized.

In some embodiments of the present invention, as shown in fig. 6 and 7, second barrel section 512 tapers in cross-section in a direction from first exhaust port 515 to second exhaust port 516. Therefore, the flow velocity of the air flow can be increased, the discharge distance of the air flow is increased, and the high-temperature air flow is prevented from being gathered at the second air outlet 516, so that the air temperature around the battery tray 100 is further reduced, and the heat around the battery tray 100 is prevented from being transferred back to the battery tray 100.

The power battery pack 1000 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

The power battery pack 1000 according to the embodiment of the invention comprises a plurality of single batteries 200, wherein each single battery 200 comprises a single explosion-proof valve; the power battery pack 1000 further includes a cover plate and the above-mentioned battery tray 100, the cover plate and the battery tray 100 are hermetically connected and together form a closed space for accommodating the battery 200.

In some examples of the present invention, the battery 200 is a four-pole battery, when the single explosion-proof valve is opened, the battery 200 may use a spare pole of the four poles to implement the reconnection of the entire power battery pack 1000, and meanwhile, since the outer side of the battery tray 100 is intact, the power battery pack 1000 cannot be repaired entirely due to the damage of the battery tray 100.

According to some embodiments of the present invention, a single explosion-proof valve is provided at the air intake hole 41. The single explosion-proof valve can block the air inlet 41, and when the pressure of the flame, smoke or gas discharged from the battery 200 reaches a certain value, the single explosion-proof valve is opened to discharge the accumulated flame, smoke or gas into the gas channel 3.

According to the power battery pack 1000 of the embodiment of the invention, by arranging the guide body 34, the guide body 34 can be used for guiding the airflow to circulate in the gas channel 3 in a roundabout manner, so that the flowing path of the airflow can be prolonged, the instantaneous pressure of the airflow is consumed, the temperature of the airflow is properly reduced, the cooling and buffering effects are achieved, the battery tray 100 is protected, the damage of the high-temperature airflow to the battery tray 100 can be reduced, and the stability and the safety of the structure of the battery tray 100 can be further improved.

A vehicle according to an embodiment of the invention is described below with reference to the drawings.

The vehicle according to the embodiment of the invention comprises the power battery pack 1000.

According to the vehicle of the embodiment of the invention, by arranging the guide body 34, the guide body 34 can be used for guiding the airflow to circulate in the gas channel 3 in a roundabout manner, so that the flowing path of the airflow can be prolonged, the instantaneous pressure of the airflow is consumed, the temperature of the airflow is properly reduced, the cooling and buffering effects are achieved, the battery tray 100 is protected, the damage of the high-temperature airflow to the battery tray 100 can be reduced, and the stability and the safety of the structure of the battery tray 100 can be further improved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery tray is characterized in that the battery tray is provided with a containing cabin for containing a battery, the battery tray comprises a tray main body, at least one part of the tray main body is internally provided with a gas channel, the tray main body is provided with a gas inlet hole and a gas outlet hole, and the gas inlet hole is communicated with the gas outlet hole through the gas channel; the gas channel is also provided with a flow guide body, and the flow guide body is used for guiding the gas flow to circulate in a roundabout way in the gas channel.

2. The battery tray of claim 1, wherein the tray body comprises a floor and a perimeter beam, the perimeter beam being disposed about the floor, the floor and the perimeter beam together defining a compartment for receiving a battery, the perimeter beam or the floor being at least partially hollow to form the gas channel.

3. The battery tray of claim 2, wherein the tray body further comprises a cross beam for reinforcing the tray body, the cross beam being at least partially hollow and penetrating the hollow portion of the side beam or the bottom plate to form the gas channel.

4. The battery tray of claim 1, wherein the flow conductor comprises a flow guide plate comprising a plurality of sub-flow guide plates that divide the gas channel into a plurality of sub-gas channels that communicate therebetween.

5. The battery tray of claim 4, wherein a plurality of said sub-gas channels are connected in an S-shape.

6. The battery tray of claim 4, wherein at least some of the sub-gas channels are provided with a phase change material, a thermal insulation material, or a porous adsorbent material.

7. The battery tray according to any one of claims 4 to 6, wherein the sub-flow guide plate comprises a first plate and a second plate, the first plate and the second plate are arranged at intervals from the inside of the tray body to the outside of the tray body and divide the gas channel into three sub-gas channels, and the three sub-gas channels comprise a first channel, a second channel and a third channel, and the first channel, the second channel and the third channel are arranged in sequence from the inside of the tray body to the outside of the tray body.

8. The battery tray according to claim 7, wherein the first passage communicates with the accommodation compartment through the air inlet hole, the first plate is provided with a plurality of first through holes, the second plate is provided with a plurality of second through holes, the first passage and the second passage communicate through the first through holes, the second passage and the third passage communicate through the second through holes, and the third passage communicates with an external space of the battery tray through the air outlet hole.

9. The battery tray of claim 8, wherein at least some of the air inlet holes are staggered with at least some of the first through holes, or at least some of the first through holes are staggered with at least some of the second through holes.

10. The battery tray of claim 9, wherein a phase change material, a thermal insulation material, or a porous adsorbent material is disposed within the second channel.

11. The battery tray according to any one of claims 4 to 6, wherein a plurality of the sub-flow deflectors protrude from one side of the tray main body and extend toward the other side of the tray main body in the inside-outside direction of the tray main body and divide the gas passage into a plurality of sub-gas passages.

12. The battery tray of claim 11, wherein a plurality of the sub-baffles are provided with third through holes, and the third through holes of two adjacent sub-baffles are arranged in a staggered manner.

13. The battery tray of claim 12, wherein the sub-baffles comprise an inner end and an outer end, and the third through holes of two adjacent sub-baffles are respectively disposed at the inner end and the outer end of the sub-baffles.

14. A power battery pack is characterized by comprising a plurality of single batteries, wherein each single battery comprises a single explosion-proof valve; the power battery pack further comprises a cover plate and the battery tray as set forth in any one of claims 1 to 13, wherein the cover plate and the battery tray are hermetically connected and jointly form a closed space for accommodating the battery.

15. The power battery pack of claim 14, wherein the unit explosion-proof valve is disposed at the air inlet.

16. A vehicle characterized by comprising the power battery pack according to claim 14 or 15.