CN218242202U - Battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery package and vehicle, the battery package, include: the battery box comprises a shell, a battery box body and a battery box body, wherein the shell comprises a plurality of outer walls, the outer walls are enclosed to form a battery accommodating cavity, a battery is arranged in the battery accommodating cavity, and an inner cavity flow channel is formed in at least one outer wall; an insulator disposed between the housing and the battery, the insulator configured to define an airflow chamber; an opening window is arranged on the insulating part, the battery is provided with a pressure release valve, the opening window is arranged corresponding to the pressure release valve, and the opening window is suitable for enabling gas in the battery to flow into the airflow cavity when the pressure release valve is opened; the inner cavity flow channel is adapted to communicate the airflow cavity with an exterior of the battery pack. The utility model discloses a battery package can realize the isolation of high-temperature gas and battery, reduces high-temperature gas's temperature, reduces the air current impact force, guarantees that the gas in the battery package is discharged safely, promotes the security of battery package.

Description

Battery pack and vehicle

Technical Field

The utility model belongs to the technical field of the battery manufacturing technique and specifically relates to a battery package and vehicle are related to.

Background

At present, the safety of the power battery is always an industry pain point, and how to realize the safety of the power battery without ignition and explosion is the research direction of various manufacturers at present. After the battery pressure relief valve is opened, high-temperature gas with sparks can fill the inner space of the bag body firstly, and impact and high temperature brought by the gas can cause insulation failure of high-voltage and low-voltage parts in the bag body, so that the risks of arcing, ignition and high-voltage short circuit are caused. Simultaneously, because opening of battery package explosion-proof valve, inside oxygen can the suck-back battery package, there is the spark inside the battery package, has the risk that the battery package explodes on fire.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a battery pack, wherein the insulating member can isolate the high temperature gas from the battery, thereby effectively preventing the thermal runaway diffusion of the battery and improving the safety of the battery pack.

According to the utility model discloses battery package, include: the battery box comprises a shell, a battery cover and a battery cover, wherein the shell comprises a plurality of outer walls, the outer walls are enclosed to form a battery accommodating cavity, a battery is arranged in the battery accommodating cavity, and an inner cavity flow channel is formed in at least one outer wall; an insulator disposed between the housing and the battery, the insulator configured to define an airflow cavity; the insulating part is provided with an opening window, the battery is provided with a pressure release valve, the opening window is arranged corresponding to the pressure release valve, and the opening window is suitable for enabling gas in the battery to flow into the airflow cavity when the pressure release valve is opened; the inner cavity flow channel is suitable for communicating the airflow cavity with the outside of the battery pack.

According to the utility model discloses battery package is equipped with the insulating part between battery and casing, and is equipped with exhaust structure outside battery package, and sets up the casing into having hollow inner chamber runner, does benefit to the isolation that realizes high-temperature gas and battery, reduces high-temperature gas's temperature, reduces the air current impact force, guarantees that the gas in the battery package discharges safely, promotes the security of battery package.

According to the utility model discloses some embodiments's battery package, a plurality of outer walls include diapire and a plurality of lateral wall, a plurality of lateral walls install in one side of diapire and with the diapire inject the battery and hold the chamber, at least one be formed with the inner chamber runner in the lateral wall and with be equipped with between the battery the insulating part.

According to the utility model discloses some embodiments's battery package, a plurality of outer walls include four lateral walls, every be formed with the inner chamber runner in the lateral wall and with be equipped with between the battery the insulating part.

According to the utility model discloses the battery package of some embodiments, the casing still includes the centre sill, the centre sill is located the battery holds the intracavity and will the battery holds the chamber and separates for at least two sons hold the chamber, the son holds the intracavity and is equipped with the battery, be formed with the inner chamber runner in the centre sill, just the centre sill with be equipped with between the battery the insulating part.

According to the utility model discloses battery package of some embodiments still includes: and the exhaust structure is arranged outside the shell and is provided with an exhaust flow channel, and the exhaust flow channel is communicated with the inner cavity flow channel and is suitable for downward exhaust.

According to the utility model discloses the battery package of some embodiments, exhaust structure is a plurality of, and is a plurality of exhaust structure spaced distribution in the circumference of casing is upwards, and is a plurality of exhaust structure's exhaust runner is suitable for respectively the casing is relative both sides are discharged.

According to the utility model discloses the battery package of some embodiments, the air current chamber with the inner chamber runner sets up to the multiunit, and multiunit air current chamber and multiunit inner chamber runner one-to-one intercommunication just is suitable for respectively from a plurality of exhaust structure's exhaust runner exhausts.

According to the utility model discloses the battery package of some embodiments, exhaust structure's bottom is equipped with the exhaust hole, the exhaust hole is a plurality of and spaced apart distribution.

According to the utility model discloses the battery package of some embodiments, at least one the outer wall is equipped with the air current mouth, the insulating part with at least one the outer wall is injectd jointly the air current chamber, the air current chamber orientation the air current mouth is opened and is passed through the air current mouth with the inner chamber runner intercommunication.

According to the utility model discloses some embodiments's battery package, the insulating part is including connecting portion and the passageway portion that links to each other, connecting portion be used for with the casing link to each other and with the air current mouth staggers, passageway portion is towards deviating from one side of battery is opened, passageway portion with the casing is injectd jointly the air current chamber, open the window and locate passageway portion.

According to the utility model discloses the battery package, it is equipped with the shutoff board to open window department, the shutoff board sets up to open when the pressurized is greater than the setting value open the window, just the shutoff board with the interior wall connection department of opening the window is equipped with the reduction region.

According to the utility model discloses some embodiments's battery package, inject in the insulating part the air current chamber, just the insulating part is deviating from one side of battery be formed with the intercommunication mouth of inner chamber runner intercommunication.

According to the utility model discloses some embodiments's battery package, the insulating part with casing detachably links to each other.

The utility model also provides a vehicle.

According to the utility model discloses the vehicle is provided with any kind of embodiment the battery package.

The vehicle and the battery pack have the same advantages compared with the prior art, and the detailed description is omitted.

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 schematic structural diagram of a battery pack according to an embodiment of the present invention;

fig. 2 is a side view of a battery pack according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a side wall of a battery pack, an insulator, and a battery according to an embodiment of the invention;

fig. 4 is a cross-sectional view of a battery pack according to an embodiment of the present invention;

FIG. 5 is an enlarged view at A in FIG. 4;

fig. 6 is an enlarged view at B in fig. 4.

Reference numerals:

the battery pack 100 is provided with a battery pack,

a shell 1, a bottom wall 11, a side wall 12, a middle beam 13, an inner cavity flow channel 14, a battery pack 15, a battery 151, a pressure relief valve 16, an airflow opening 17,

the insulating member 2, the connecting portion 21, the passage portion 22, the airflow chamber 23, the opening window 24, the blocking plate 25,

the air exhaust structure 3, an air exhaust flow passage 31 and a battery pack explosion-proof valve 32.

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 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 drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The following describes the battery pack 100 according to the embodiment of the present invention with reference to fig. 1-6, an insulating member 2 is provided between the casing 1 of the battery pack 100 and the battery 151, the insulating member 2 can isolate the high temperature gas from the battery 151, and can prevent the high temperature gas generated by the battery 151 from causing thermal runaway diffusion, and meanwhile, the longer flow channel formed in the battery pack 100 facilitates the realization of the cooling of the high temperature gas and the extinguishing of sparks, and the safe discharge of the high temperature gas.

As shown in fig. 1 to 6, a battery pack 100 according to an embodiment of the present invention includes: a housing 1, an insulator 2 and an exhaust structure 3.

Casing 1 includes a plurality of outer walls, and a plurality of outer walls enclose to close and form the battery and hold the chamber, and the battery holds the intracavity and is equipped with group battery 15, and group battery 15 includes at least one battery 151, in other words, casing 1 has the open battery of up and holds the chamber, and battery 151 fixed mounting holds the intracavity in the battery, and battery 151 can adopt the blade battery. An inner cavity flow channel 14 is formed in at least one outer wall of the housing 1, that is, at least one outer wall of the housing 1 is configured as a hollow structure, and the inner cavity flow channel 14 is formed in the outer wall configured as the hollow structure, it should be noted that the battery accommodating cavity is formed by enclosing a plurality of outer walls of the housing 1, the inner cavity flow channel 14 is formed inside at least one outer wall of the housing 1, for example, the inner cavity flow channel 14 is located in a side wall of the housing 1, and the inner cavity flow channel 14 and the battery accommodating cavity are different spaces respectively.

The insulating member 2 is installed between the housing 1 and the battery 151, and it can be understood that the battery 151 is installed in the housing 1, and a certain installation gap exists between the end of the battery 151 and the inner wall of the housing 1, and the insulating member 2 can be disposed in the installation gap, so that the insulating member 2 can isolate the end of the battery 151 from the inner wall of the housing 1 in the installation gap. After the insulating member 2 is mounted between the case 1 and the battery 151, the insulating member 2 serves to define the airflow chamber 23. If the opening window 24 is opposite to the pressure release valve 16, high-temperature gas generated by thermal runaway of the battery can directly impact the opening window 24 after the pressure release valve 16 is broken through, so that the high-temperature gas can be directly discharged from the opening window 24 and enter the gas flow chamber 23, in other words, the opening window 24 is suitable for enabling the gas in the battery 15 to flow into the gas flow chamber 23 when the pressure release valve 16 is opened.

Thus, the gas flow chamber 23 of the insulating member 2 can communicate with the space where the battery 15 is located only at the opening window 24, that is, in the event of actual thermal runaway of the battery, the high-temperature gas flowing into the gas flow chamber 23 can be spaced apart from the battery 15 under the insulating action of the insulating member 2.

Therefore, high-temperature gas generated by the thermal runaway battery 151 can enter the gas flow chamber 23 from the corresponding opening window 24, so that the high-temperature gas is isolated from other parts in the battery pack 100 as much as possible through the insulating member 2, gas fleeing is avoided, and particularly, the high-temperature gas generated by the thermal runaway battery 151 and sparks accompanying in the gas can be prevented from flowing to adjacent or spaced normal batteries 151, and thermal runaway diffusion is avoided; and, the distance between adjacent cells 151 is small, the high-temperature gas generated by the thermal runaway cells 151 is liable to rebound to other cells 151 under the action of the inner wall of the case 1, and by providing the insulating member 2, the rebound of the high-temperature gas can be effectively prevented, and at the same time, the situation that the high-temperature gas impacts the relief valve 16 of the adjacent cell 151 due to rebound impact after impacting the case is avoided, and the occurrence of continuous thermal runaway of the cells 151 is prevented; moreover, appear thermal runaway and open 24 pressurized backs of opening of window in battery 151, the inside electrified material of battery 151 is discharged like copper aluminium foil is likely to follow high-temperature gas, and the metallics leads to the short circuit in the overlap joint, the utility model provides an insulating part 2's insulating nature is good, and the size of opening window 24 can the great material of separation spill over, can paste one deck mica paper simultaneously on casing 1 in order to form with insulating part 2 and seal high temperature resistant insulating cavity, prevent that the short circuit from drawing the arc. The insulation 2 may comprise a mica material.

The inner cavity flow channel 14 is communicated with the air flow cavity 23, and the inner cavity flow channel 14 is used for communicating the air flow cavity 23 with the outside of the battery pack 100. That is, when thermal runaway occurs in the battery 151 in the battery pack 15, high-temperature gas generated by the battery 151 can enter the gas flow chamber 23 from the opening window 24, flow in the gas flow chamber 23, and be cooled, and the high-temperature gas in the gas flow chamber 23 enters the inner cavity flow channel 14 of the housing 1 from the gas flow chamber 23, so that the high-temperature gas further flows in the inner cavity flow channel 14 to be cooled, and is finally discharged from the inner cavity flow channel 14, for example, the gas flow is discharged toward the ground.

The utility model discloses in, inner chamber runner 14 communicates with air current chamber 23, can be that battery 151 in group battery 15 does not take place the high-temperature gas blowout when communicate promptly, also can set up the structure that window 24 was opened to the similarity between inner chamber runner 14 and air current chamber 23, does not communicate or only communicates through very little gap when battery 151 in group battery 15 does not take place the high-temperature gas blowout, nevertheless communicates when battery 151 in group battery 15 takes place the high-temperature gas blowout.

The utility model discloses in, inner chamber runner 14 is used for referring to air current chamber 23 and the outside intercommunication of battery package 100, when needs communicate air current chamber 23 and the outside of battery package 100, for example, battery 151 in group battery 15 takes place the high-temperature gas blowout, when needing the battery package of high-temperature gas discharge, inner chamber runner 14 can play intercommunication air current chamber 23 and the outside effect of battery package 100, but when battery 151 in group battery 15 does not take place the high-temperature gas blowout, air current chamber 23 can not communicate with the outside of battery package 100. Through the arrangement, the high-temperature gas generated by the battery 151 needs to sequentially pass through the opening window 24, the airflow cavity 23 and the inner cavity runner 14 in the discharging process, the high-temperature gas generated by the battery 151 can be insulated and isolated, the high-temperature gas has a longer flow path when being discharged, and in the flowing process, the material performance of the shell 1 can be utilized for heat conduction and temperature reduction. When high-temperature gas flows in a plurality of different runners, at least two of the different runners are connected in a bending mode, so that the airflow path is prolonged, the flowing of the high-temperature gas can be buffered, and the impact force of the airflow is reduced. Meanwhile, a longer flow path is arranged, so that part of carbonized powder carried in high-temperature gas is deposited in each flow channel, and further the carbonized powder is prevented from being blocked at the outlet of the inner cavity flow channel 14 in a centralized manner, if a battery pack explosion-proof valve 32 is arranged on the outer peripheral wall of the shell 1, the carbonized powder is prevented from being accumulated at the battery pack explosion-proof valve 32, and the normal exhaust of the battery pack 100 is ensured.

According to the utility model discloses battery package 100 is equipped with insulating part 2 between battery 151 and casing 1, and insulating part 2 is used for injecing air current chamber 23, sets up at least one outer wall of casing 1 into having inner chamber runner 14, can be isolated high-temperature gas and battery 151, reduces high-temperature gas's temperature, reduces the air current impact force, guarantees that the gas in battery package 100 discharges safely, promotes battery package 100's security.

In some embodiments, the plurality of outer walls includes a bottom wall 11 and a plurality of side walls 12.

Wherein, the bottom wall 11 is configured to be a flat plate shape, the bottom wall 11 is generally located at the bottom of the housing 1 in the practical application scene of the battery pack 100, and supports the batteries and other components in the battery pack 100, the plurality of side walls 12 are configured to be annular structures which are closed in the circumferential direction, and the plurality of side walls 12 are installed at one side of the bottom wall 11, for example, in the practical application scene of the battery pack 100, the plurality of side walls 12 are arranged at the upper side of the bottom wall 11 and define a battery accommodating cavity with the upper side surface of the bottom wall 11, so that the battery accommodating cavity is opened upwards.

Wherein, at least one side wall 12 has an inner cavity flow channel 14 therein, and the insulating member 2 is provided between the inner side of the at least one side wall 12 and the battery 151, thereby, when high-temperature gas is generated in the battery 151, the high-temperature gas can enter the gas flow cavity 23 of the insulating member 2 from the opening window 24, enter the inner cavity flow channel 14 of the at least one side wall 12 from the gas flow cavity 23, further continuously flow in the at least one side wall 12, and finally be discharged from the outer side of the at least one side wall 12, thereby, the effective discharge of the high-temperature gas flow is realized.

In some embodiments, the plurality of outer walls includes four side walls 12, the four side walls 12 are sequentially connected end to form a circumferentially closed annular structure, an inner cavity flow channel 14 is formed in each side wall 12, and an insulating member 2 is arranged between each side wall 12 and the battery 151. In this way, the insulating member 2 corresponding to each side wall 12 can separate the side wall 12 from the internal battery 151, and the air flow can be guided out through the inner cavity flow channel 14 in the corresponding side wall 12, and especially when the battery 151 at any position is in thermal runaway, high-temperature gas can be guided out through the corresponding insulating member 2 and the corresponding side wall 12, thereby ensuring the reliability of the air flow guiding effect.

In some embodiments, the housing 1 further includes a middle beam 13, the middle beam 13 is installed in the battery accommodating cavity, and the middle beam 13 divides the battery accommodating cavity into at least two sub accommodating cavities, optionally, as shown in fig. 1, the middle beam 13 is extended along a length direction (left and right directions in fig. 1) of the battery pack 100, and a plurality of sub accommodating cavities are formed at two sides of the middle beam 13, that is, the middle beam 13 divides the battery accommodating cavity into a plurality of sub accommodating cavities, wherein the sub accommodating cavities are provided with batteries 151, and the plurality of batteries 151 in each sub accommodating cavity are in one group to form the battery pack 15, as shown in fig. 1, 4 battery packs 15 are installed in the battery pack 100.

The intermediate beam 13 also has an inner cavity flow channel 14 therein, and an insulator 2 is provided between the intermediate beam 13 and the battery 151. Similar to the insulator 2 disposed between at least one of the outer walls and the battery 151, the insulator 2 between the center beam 13 and the battery 151 is configured to define a gas flow chamber 23, and an opening window 24 is disposed on the insulator 2, the opening window 24 is disposed corresponding to the pressure release valve 16 of the battery 151, the opening window 24 is adapted to allow the gas in the battery 151 to flow into the gas flow chamber 23 when the pressure release valve 16 is opened, and the inner chamber flow channel 14 is adapted to communicate the gas flow chamber 23 with the outside of the battery pack 100. In some embodiments, the inner cavity flow channel 14 of the middle beam 13 is communicated with the built-in flow channel 14 of the side wall 12, when the battery 151 arranged corresponding to the opening window 24 of the insulating member 2 arranged between the middle beam 13 and the battery 151 is out of thermal runaway, the generated high-temperature gas can flow out through the insulating member 2 arranged between the middle beam 13 and the battery 151, and the high-temperature gas can flow in the middle beam 13 and the side wall 12, so that the flow path of the high-temperature gas is increased, and the gas flow out effect is increased.

As shown in fig. 1, the side walls 12 and the middle beam 13 are provided with inner cavity runners 14, and the insulating members 2 are arranged between the battery pack 15 and the side walls 12 and between the battery pack 15 and the middle beam 13, so that after thermal runaway occurs in the batteries 151 at different positions, airflow can be led out through the side walls 12 or the middle beam 13 connected with the batteries 151, the structure is simple, the internal safety of the battery pack 100 is guaranteed, and timely leading-out of thermal runaway high-temperature gas is realized.

In some embodiments, the battery pack 15 includes a plurality of batteries 151, and the plurality of batteries 151 are sequentially stacked in the sub-receiving cavity, that is, as shown in fig. 3, each battery pack 15 includes a plurality of batteries 151 that are sequentially stacked, as shown in fig. 1, 4 battery packs 15 are provided in the battery pack 100, and the stacking directions of the batteries 151 of the 4 battery packs 15 are the same and are all stacked along the length direction (the left-right direction in fig. 1) of the battery pack 100.

The insulating member 2 is provided between the end of the battery 151 and the side wall 12 and/or the intermediate beam 13, and the insulating member 2 may be provided between the end of the battery 151 and the side wall 12 or between the end of the battery 151 and the intermediate beam 13.

As shown in fig. 1, the battery pack 100 includes four side walls 12, four battery packs 15 are distributed in the battery pack 100, and the length direction (e.g., the up-down direction in fig. 1) of the battery 151 is the same as the width direction (e.g., the up-down direction in fig. 1) of the battery pack 100, while the center beam 13 is located in the middle of the battery pack 100 and extends in the length direction of the battery pack 100, two battery packs 15 are provided on one side of the center beam 13, and two battery packs 15 are provided on the other side. Wherein, as shown in fig. 1, two insulators 2 are provided between one side of the middle beam 13 and two batteries 15, two insulators 2 are provided between the other side of the middle beam 13 and two batteries 15, and four insulators 2 are provided between four side walls 12 and four battery packs 15, respectively.

Therefore, when thermal runaway occurs in any one of the batteries 151 in the four battery packs 15, high-temperature gas of the thermal runaway can be led out through the insulating members 2 corresponding to the end parts of the batteries, and the high-temperature gas can be separated from other batteries 151 in the battery packs 15 which are not subjected to the thermal runaway through the insulating members 2, so that the overall safety of the battery pack 100 is greatly improved.

In some embodiments, the battery pack 100 further includes a vent structure 3, the vent structure 3 is mounted outside the housing 1, and the vent structure 3 has a vent channel 31, the vent channel 31 is in communication with the inner cavity channel 14, and the vent channel 31 is adapted to vent air downwards. That is, when the thermal runaway of the battery 151 in the battery pack 15 occurs, the high-temperature gas generated by the battery 151 can flow from the opening window 24, the airflow chamber 23 and the inner cavity flow channel 14 to the exhaust flow channel 31 of the exhaust structure 3 in sequence, so that the high-temperature gas is discharged downwards under the diversion effect of the exhaust flow channel 31, for example, the airflow is discharged towards the ground. The exhaust flow passage 31 is communicated with the inner cavity flow passage 14, and the exhaust flow passage 31 can be directly communicated with the inner cavity flow passage 14; the exhaust channel 31 may be communicated with the inner cavity channel 14 through another component such as an explosion-proof valve, and at this time, the exhaust channel 31 is not communicated with the inner cavity channel 14 when the inner cavity channel 14 does not need to exhaust the gas to the outside of the battery pack, for example, the exhaust channel 31 is not communicated with the inner cavity channel 14 when the high-temperature gas is not ejected from the battery 151 in the battery pack 15, but the explosion-proof valve is broken when the high-temperature gas is ejected from the battery 151 in the battery pack 15, and the exhaust channel 31 is communicated with the inner cavity channel 14.

Through foretell setting, and when the gas after cooling through each runner was discharged by exhaust runner 31, reduce the air current impact force, and under exhaust structure 3's water conservancy diversion effect, gaseous ground around can being towards battery package 100 is discharged, and the combustion gas impact force is little and the discharge direction is lower, from this, can avoid battery package 100 combustion gas to produce the impact to pedestrian or cockpit around, and battery package 100's use is safer.

In some embodiments, as shown in fig. 1, the number of the exhaust structures 3 is multiple, and the exhaust structures 3 are distributed in the circumferential direction of the side wall 12 at intervals, so that the thermal runaway high-temperature gas in the battery pack 100 can be respectively led out from different positions in the circumferential direction of the side wall 12, and the exhaust amount can be increased, thereby avoiding the situation that the high-temperature gas cannot be led out in time.

The exhaust gas flow passages 31 of the plurality of exhaust structures 3 are adapted to exhaust gas on opposite sides of the side walls 12, respectively. As shown in fig. 1, the battery pack 100 is provided with four vent structures 3, and two vent structures 3 are provided on a first side of the battery pack 100, e.g., an upper side in fig. 1, and two vent structures 3 are provided on a second side of the battery pack 100, e.g., a lower side in fig. 1. Therefore, high-temperature gas out of control of heat in the battery pack 100 can be led out from two sides of the battery pack 100, exhaust efficiency is improved, and directional leading-out is achieved.

And, as shown in fig. 2, the two exhaust structures 3 on each side of the battery pack 100 are respectively disposed at two end positions of the corresponding side wall, that is, the four exhaust structures 3 of the battery pack 100 are respectively located at four corner positions of the battery pack 100, so that the thermal runaway high-temperature gas can be uniformly dispersed from each position in the circumferential direction of the battery pack 100, thereby reducing concentrated gas discharge, preventing interference of the derived gas flows of the exhaust structures 3 at different positions, and ensuring the exhaust efficiency.

In some embodiments, the bottom of the exhaust structure 3 is provided with a plurality of exhaust holes distributed at intervals, and therefore, high-temperature airflow flowing into the exhaust structure 3 can be discharged out of the exhaust structure 3 from the plurality of exhaust holes, so that the high-temperature airflow is dispersed into multiple strands of fine airflow, the injection speed is increased, the effects of shunting and accelerating similar showers are realized, and cooling and heat dissipation are facilitated. The bottom of the venting structure 3 is understood to mean the side of the venting structure 3 facing away from the passenger compartment in the usual application scenario of the battery pack 100, for example, when the battery pack 100 is mounted on the bottom of a vehicle.

In some embodiments, the airflow chambers 23 and the inner cavity flow passages 14 are provided in multiple sets, and the multiple sets of airflow chambers 23 are in one-to-one communication with the multiple sets of inner cavity flow passages 14 and are adapted to exhaust from the exhaust flow passages of the multiple exhaust structures 3, respectively, to form multiple sets of flow guide paths. This enables the different battery packs 15 in the battery pack 100 to be led out of the battery pack 100 through different paths when the batteries are thermally runaway. For example, a plurality of sets of flow guiding paths respectively correspond to a plurality of battery packs 15, that is, each set of battery pack 15 may correspond to a set of independent flow guiding paths, the flow guiding paths of different battery packs 15 are not communicated with each other, and each set of flow guiding paths is formed by a set of airflow cavities 23, inner cavity flow channels 14 and exhaust structures 3 which are communicated with each other. When thermal runaway occurs in the batteries 151 in the plurality of battery packs 15, the batteries can be discharged out of the battery pack 100 through the corresponding flow guide paths. As shown in fig. 1, four sets of flow guide paths are formed in the battery pack 100, and the four sets of flow guide paths are used for guiding out high-temperature gas generated by thermal runaway of the four battery packs 15.

In some embodiments, as shown in fig. 3, the insulating member 2 is provided with a plurality of opening windows 24, the plurality of opening windows 24 are distributed at intervals in the length direction (left-bottom-up-right direction in fig. 3) of the insulating member 2, as shown in fig. 3, the battery pack 15 includes a plurality of batteries 151, the plurality of batteries 151 are sequentially stacked, and each battery 151 is provided with one pressure relief valve 16. The plurality of opening windows 24 are distributed in one-to-one correspondence with the pressure release valves 16 of the plurality of batteries 151, and therefore when thermal runaway occurs in any one of the batteries 151, generated high-temperature gas can enter the airflow cavity 23 of the insulating member 2 through the corresponding opening window 24, thermal runaway diffusion is well prevented, and safety of the battery pack 100 is improved.

In some embodiments, the at least one outer wall of the housing 1 facing the inside of the battery 151 is provided with the airflow port 17, the insulating member 2 and the at least one outer wall together define the airflow chamber 23 facing the inside of the battery 151, the airflow chamber 23 is open to the airflow port 17 to communicate with the inner chamber flow channel 14 through the airflow port 17, the airflow port 17 is used for communicating the inner chamber flow channel 14 with the airflow chamber 23, and in practical design, the shut-off area of the airflow port 17 can be larger than that of the opening window 24, so that the airflow in the airflow chamber 23 can be timely and effectively discharged to the inner chamber flow channel 14 of the housing 1.

As shown in fig. 3, a plurality of air flow ports 17 are disposed on the inner side of the at least one outer wall facing the battery 151, and the air flow ports 17 are distributed at intervals on the outer wall, so that the air flow chambers 23 can be communicated with the inner cavity flow channels 14 at multiple positions through the air flow ports 17, the air flow quantity between the air flow chambers 23 and the inner cavity flow channels 14 is increased, and the high-temperature gas is ensured to be discharged in time.

In some embodiments, the insulating member 2 includes the connecting portion 21 and the channel portion 22 that are connected to each other, and the connecting portion 21 and the channel portion 22 may be integrally formed, so as to ensure the connection strength between the connecting portion 21 and the channel portion 22, improve the overall structural strength of the insulating member 2, prevent the problem that the connecting portion 21 and the channel portion 22 are broken when the battery pack 100 is impacted by the thermal runaway high-temperature gas, and ensure the stable structural state of the insulating member 2. Wherein the connecting portion 21 may be configured as a flat plate shape, and the channel portion 22 may be configured as a plurality of connected bending plates.

The connecting portion 21 is used for being connected with the casing 1 and staggered with the airflow port 17, for example, the connecting portion 21 and the outer wall are attached and fixed towards the inner side of the battery 151, and when the battery pack is actually designed, the connecting portion 21 and the outer wall can be detachably connected through a connecting piece towards the inner side of the battery 151, so that the insulating part 2 is fixedly installed on the casing 1, the insulating part 2 can be flexibly detached from the battery pack 100, and later maintenance and replacement of the insulating part 2 are facilitated.

The channel part 22 is formed with a recessed area opened to a side away from the battery 15, as shown in fig. 5, the connecting part 21 is connected to an upper side of the channel part 22, and a left side of the channel part 22 is formed with a recessed area opened to the left side, so that after the insulating member 2 is attached to the inner wall of the housing 1, the connecting part 21 is fixed in contact with the housing 1, the channel part 22 is spaced apart from the inner wall of the housing 1 at the recessed area to form the airflow chamber 23, in other words, the airflow chamber 23 is formed at the recessed area of the channel part 22. Therefore, the insulating member 2 is fixedly connected to the housing 1 through the connecting portion 21, and the airflow chamber 23 is defined by the channel portion 22 and the housing 1, so that after the thermal runaway high-temperature gas enters the airflow chamber 23, the channel portion 22 can isolate the high-temperature gas from other components of the battery pack 100.

The opening window 24 is disposed on the channel portion 22, wherein, during actual design, the opening window 24 is disposed on one side of the channel portion 22 close to the battery 15, so that when the battery is out of control due to thermal runaway, the high temperature gas can impact the opening window 24, and further the high temperature gas can be discharged into the airflow cavity 23 in time, thereby avoiding the high temperature gas from staying in the battery 151 and the battery pack 15 for too long time, and improving the safety of the battery pack 100.

In some embodiments, a blocking plate 25 is disposed at the opening window 24, a weakened area is disposed at a connection position of the blocking plate 25 and an inner wall of the opening window 24, and the blocking plate 25 is configured to open the opening window 24 when the pressure is greater than a set value. A weakened area is formed at the junction of the outer circumferential edge of the blocking plate 25 and the inner circumferential edge of the opening window 24, and a weakened area is also formed in the middle of the blocking plate 25, i.e., the weakened area includes an outer weakened area surrounding the blocking plate 25 and an inner weakened area formed in the blocking plate 25, wherein the inner weakened area may be configured in a cross shape, and the inner weakened area communicates with the outer weakened area.

It should be noted that the thickness of the weakened region is smaller than that of the blocking plate 25, and the weakened region is configured as a weakened groove to reduce the connection strength between the blocking plate 25 and the inner peripheral wall of the opening window 24, and simultaneously reduce the structural strength of the blocking plate 25 itself. Thus, when thermal runaway of the battery 151 occurs, the blocking plate 25 is impacted by high-temperature gas and is broken at the weakened region, thereby opening the opening window 24 to communicate the airflow chamber 23 with the internal space of the battery 15.

In some embodiments, an airflow cavity 23 is defined in the insulating member 2, a communication port communicated with the inner cavity flow channel 14 is formed in one side of the insulating member 2 away from the battery, that is, in actual design, the insulating member 2 can be constructed as an intermediate member, and the airflow cavity 23 is formed in the insulating member 2, so that the airflow cavity 23 is communicated with the inner cavity flow channel 14 at the communication port, that is, the insulating member 2 separates the high-temperature airflow inside the insulating member from the inner wall of the housing 1, thereby improving the insulating effect, and meanwhile, the flexible arrangement of the structure of the insulating member 2 is facilitated, and the arrangement difficulty is facilitated to be reduced.

In some embodiments, the insulating member 2 is detachably connected to the housing 1, for example, the insulating member 2 is provided with a plurality of connecting holes for detachably connecting to the housing 1, and the plurality of connecting holes are distributed at intervals along the length direction of the insulating member 2. As shown in fig. 1, the connecting portions 21 are disposed at the connecting portions 21, and the connecting portions are uniformly spaced apart in a length direction (e.g., a left-lower-upper-right direction in fig. 3) of the connecting portions 21, and the connecting portions 21 can be connected and fixed to the housing 1 by connecting members respectively penetrating the connecting portions, so as to improve the connection stability between the insulating member 2 and the housing 1.

The utility model also provides a vehicle.

According to the utility model discloses vehicle is provided with any of above-mentioned embodiments battery package 100, can guarantee that the high-temperature gas that battery 151 in the battery package 100 produced when thermal runaway discharges effectively, and is doing benefit to the isolation that realizes high-temperature gas and battery 151, reduces high-temperature gas's temperature, reduces the air current impact force, guarantees that the gas in the battery package 100 discharges safely, and then promotes whole car security.

Wherein, what need explain is, among the length direction, width direction and the thickness direction of the structure that the utility model refers to, the ascending size in length direction of structure is greater than the ascending size in width direction, and all is greater than the ascending size in thickness direction, and length direction, width direction and the thickness direction quadrature of each other.

1. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

2. In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

3. In the description of the present invention, "a plurality" means two or more.

4. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

5. In the description of the invention, "on", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means 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 present 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 present 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 (14)

1. A battery pack (100), comprising:

the battery box comprises a shell (1), wherein the shell (1) comprises a plurality of outer walls, the outer walls surround to form a battery accommodating cavity, a battery (151) is arranged in the battery accommodating cavity, and an inner cavity flow channel (14) is formed in at least one outer wall;

an insulator (2), the insulator (2) being disposed between the housing (1) and the battery (151), the insulator (2) being configured to define an airflow chamber (23);

an opening window (24) is arranged on the insulating part (2), the battery (151) is provided with a pressure relief valve (16), the opening window (24) is arranged corresponding to the pressure relief valve (16), and the opening window (24) is suitable for enabling the gas in the battery (151) to flow into the airflow cavity (23) when the pressure relief valve (16) is opened;

the inner cavity flow channel (14) is adapted to communicate the airflow cavity (23) with the outside of the battery pack (100).

2. The battery pack (100) of claim 1, wherein the plurality of outer walls comprise a bottom wall (11) and a plurality of side walls (12), the plurality of side walls (12) are mounted on one side of the bottom wall (11) and define the battery receiving cavity with the bottom wall (11), at least one of the side walls (12) has an inner cavity flow channel (14) formed therein and the insulating member (2) is disposed between the inner cavity flow channel and the battery (151).

3. The battery pack (100) of claim 2, wherein the plurality of outer walls comprises four side walls (12), wherein an inner cavity flow channel (14) is formed in each side wall (12) and the insulating member (2) is disposed between the side wall and the battery (151).

4. The battery pack (100) of claim 2, wherein the housing (1) further comprises a middle beam (13), the middle beam (13) is located in the battery accommodating cavity and divides the battery accommodating cavity into at least two sub-accommodating cavities, the batteries (151) are arranged in the sub-accommodating cavities, an inner cavity flow channel (14) is formed in the middle beam (13), and the insulating member (2) is arranged between the middle beam (13) and the batteries (151).

5. The battery pack (100) according to any one of claims 1-4, further comprising: the exhaust structure (3) is installed outside the shell (1) and is provided with an exhaust flow channel (31), and the exhaust flow channel (31) is communicated with the inner cavity flow channel (14) and is suitable for downward exhaust.

6. The battery pack (100) according to claim 5, wherein the vent structure (3) is plural, and the plurality of vent structures (3) are spaced apart from each other and distributed on the circumference of the housing (1), and the vent channels (31) of the plurality of vent structures (3) are adapted to vent air on two opposite sides of the housing (1).

7. The battery pack (100) according to claim 6, wherein the air flow chambers (23) and the inner chamber flow channels (14) are provided in a plurality of sets, and the plurality of sets of air flow chambers (23) communicate with the plurality of sets of inner chamber flow channels (14) in one-to-one correspondence and are adapted to exhaust air from the exhaust air flow channels (31) of the plurality of exhaust structures (3), respectively.

8. The battery pack (100) according to claim 5, wherein the bottom of the venting structure (3) is provided with a plurality of venting holes distributed at intervals.

9. The battery pack (100) of claim 1, wherein the at least one of the outer walls is provided with an air flow port (17), the insulator (2) and the at least one of the outer walls together defining the air flow chamber (23), the air flow chamber (23) being open to the air flow port (17) and communicating with the inner chamber flow channel (14) through the air flow port (17).

10. The battery pack (100) according to claim 9, wherein the insulating member (2) includes a connecting portion (21) and a channel portion (22) connected to each other, the connecting portion (21) being adapted to be connected to the case (1) and being offset from the airflow opening (17), the channel portion (22) being open to a side facing away from the battery (151), the channel portion (22) defining the airflow chamber (23) together with the case (1), the opening window (24) being provided in the channel portion (22).

11. The battery pack (100) according to claim 1, wherein a blocking plate (25) is provided at the opening window (24), the blocking plate (25) is configured to open the opening window (24) when the pressure is greater than a set value, and a weakened area is provided at a connection position of the blocking plate (25) and the inner wall of the opening window (24).

12. The battery pack (100) according to claim 1, wherein the airflow chamber (23) is defined in the insulating member (2), and the insulating member (2) is formed with a communication port communicating with the inner chamber flow channel (14) at a side facing away from the battery (151).

13. The battery pack (100) according to claim 1, wherein the insulating member (2) is detachably connected to the case (1).

14. A vehicle, characterized in that a battery pack (100) according to any one of claims 1-13 is provided.

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