CN220042134U - Bottom plate assembly and battery with same - Google Patents

Abstract

The utility model discloses a bottom plate assembly and a battery with the same, wherein the bottom plate assembly is supported on the lower side of a battery monomer, the battery monomer is provided with a pressure release mechanism arranged towards the bottom plate assembly, and the bottom plate assembly comprises: the first plate and the second plate are horizontal plates and are arranged at intervals up and down, and the first plate is positioned on the upper side of the second plate; the connecting ribs are connected between the first plate and the second plate, the connecting ribs extend along a first direction of a horizontal plane and are distributed at intervals in a second direction in the horizontal plane, the first direction is perpendicular to the second direction, the bottom plate assembly is provided with an exhaust channel with an upward opening, and the exhaust channel extends along the second direction. According to the bottom plate assembly provided by the utility model, the anti-collision capacity of the bottom of the battery and the stability of the battery cell can be improved, and the probability of crushing during the exhaust of the exhaust channel is reduced.

Description

Bottom plate assembly and battery with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a bottom plate assembly and a battery with the same.

Background

With the great development of new energy automobiles, various spontaneous combustions frequently occur in electric vehicles, wherein the spontaneous combustions are relatively high due to the impact of batteries, particularly the impact of the bottoms of the batteries. An exhaust channel is arranged in the battery, and the gas in the battery core in thermal runaway is exhausted to slow down the spread of the thermal runaway of the battery core, but the exhaust channel is easy to crush due to the larger impact force of the exhausted gas when the battery core is in thermal runaway.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model aims to provide the bottom plate assembly which can improve the anti-collision capacity of the bottom of the battery, improve the stability of the battery monomer in the battery and improve the safety of the battery and the reliability in the working process.

The utility model also provides a battery with the bottom plate assembly.

According to a first aspect of the present utility model, a floor assembly is supported on an underside of a battery cell having a pressure relief mechanism disposed toward the floor assembly, the floor assembly comprising: the first plate and the second plate are horizontal plates and are arranged at intervals up and down, and the first plate is positioned on the upper side of the second plate; the connecting ribs are connected between the first plate and the second plate, the connecting ribs extend along a first direction of a horizontal plane and are distributed at intervals in a second direction in the horizontal plane, the first direction is perpendicular to the second direction, the bottom plate assembly is provided with an exhaust channel with an upward opening, and the exhaust channel extends along the second direction.

According to the bottom plate assembly of the first aspect of the utility model, the first plate and the second plate are arranged, the plurality of connecting ribs are connected between the first plate and the second plate, so that the anti-collision capacity of the bottom of the battery can be improved, the stability of the battery unit in the battery is improved, the exhaust channel is arranged, the pressure release mechanism can be discharged to the gas of the bottom plate assembly through the exhaust channel, the safety of the battery is improved, the extending direction of the connecting ribs is vertical to the extending direction of the exhaust channel, the plurality of supporting ribs support the first plate at two sides of the exhaust channel, the probability of being crushed when the exhaust channel is exhausted can be reduced, and the reliability of the battery in the working process is improved.

According to some embodiments of the utility model, the vent channel is formed by the first plate being recessed downward.

According to some embodiments of the utility model, the ratio between the depth of the exhaust channel and the total height of the floor assembly is 50% -90% in the up-down direction; and/or, in a top-down direction, two opposite side walls of the exhaust channel in the first direction extend towards each other, and an included angle between the two side walls of the exhaust channel and the first plate is 15 ° -60 °; and/or the ratio between the width of the opening side of the exhaust passage in the first direction and the maximum size of the pressure relief mechanism in the first direction is 1.2-1.5.

According to some embodiments of the utility model, the number of the exhaust channels is a plurality, the exhaust channels are arranged at intervals in the first direction, two adjacent connecting ribs are matched with the first plate and the second plate to define a communication channel, the communication channel extends along the first direction, a vent hole penetrating through the side wall of the exhaust channel is formed in the side wall of the exhaust channel, and the exhaust channel is communicated with the communication channel through the vent hole.

According to some embodiments of the utility model, the plurality of air vents are arranged at intervals along the second direction, and the ratio between the interval between two adjacent air vents in the second direction and the maximum size of the pressure release mechanism in the second direction is 1-3.

According to some embodiments of the utility model, a ratio between a length of the exhaust passage in the second direction and a total length of the plurality of battery cells in the second direction is 1.1-1.3.

According to some embodiments of the utility model, the connection ribs are inclined with respect to a horizontal plane, and in the second direction, the inclination directions of two adjacent connection ribs are the same or opposite.

According to some embodiments of the utility model, the angle between the connecting rib and the horizontal plane is 25 ° -65 °; and/or in the second direction, the ratio of the maximum distance between two adjacent connecting ribs to the height of the bottom plate assembly in the up-down direction is 6-9.

According to some embodiments of the utility model, a ratio between a height of the bottom plate assembly and a total height of the case of the battery in an up-down direction is 1/10 to 1/4; and/or the ratio between the thickness of the connecting rib and the height of the bottom plate assembly in the up-down direction is 1/5-1/2.

According to a second aspect of the utility model, a battery comprises a box body and a plurality of battery units, wherein the box body comprises a frame and the bottom plate assembly according to the first aspect of the utility model, the bottom plate assembly is connected to the bottom of the frame, the battery units are arranged in the box body and supported on the bottom plate assembly, and at least part of pressure release mechanisms of the battery units are arranged towards the bottom plate assembly and are communicated with the exhaust channel.

According to the battery of the second aspect of the utility model, by arranging the bottom plate assembly according to the embodiment of the first aspect of the utility model, the bottom plate assembly can be matched with the frame to limit the assembly space of the battery unit, so that the assembly of a plurality of battery units is realized. In addition, the bottom plate assembly has strong anti-collision capability and high exhaust efficiency, and also has energy absorption and vibration reduction capabilities, so that the anti-collision capability of the bottom of the battery, the safety of the battery and the stability of internal elements of the battery can be improved.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

Fig. 1 is an exploded view of a battery according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of the floor assembly shown in FIG. 1;

fig. 3 is an enlarged view at a shown in fig. 2;

FIG. 4 is a schematic view of a first plate, a second plate and a connecting bar according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of the floor assembly shown in FIG. 2.

Reference numerals:

1000. a battery;

100. a base plate assembly;

10. a first plate; 11. an exhaust passage; 111. a vent;

20. a second plate;

30. a connecting rib;

200. a battery cell;

300. a case; 310. a frame;

400. a cooling plate;

500. a high voltage distribution box access cover plate; 510. high voltage distribution box access opening.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A floor assembly 100 according to an embodiment of the first aspect of the utility model is described below with reference to fig. 1-5.

As shown in fig. 1 and 2, according to the floor assembly 100 of the first aspect of the embodiment of the present utility model, the floor assembly 100 is supported on the lower side of the battery cell 200, the battery cell 200 has a pressure release mechanism (not shown) disposed toward the floor assembly 100, and the floor assembly 100 includes: a first plate 10, a second plate 20 and a plurality of connecting ribs 30.

Specifically, the first plate 10 and the second plate 20 are both horizontal plates and are arranged at intervals up and down, a plurality of connection ribs 30 are connected between the first plate 10 and the second plate 20 at the upper side of the first plate 10, the plurality of connection ribs 30 extend in a first direction (e.g., the front-rear direction shown in fig. 2) of a horizontal plane and are arranged at intervals in a second direction (e.g., the left-right direction shown in fig. 2) of the horizontal plane, the first direction is perpendicular to the second direction, the floor assembly 100 is formed with an exhaust passage 11 with an opening upward, and the exhaust passage 11 extends in the second direction.

Wherein both the first plate 10 and the second plate 20 can provide protection for the battery cell 200 at the lower side of the battery cell 200, and the battery cell 200 is not in contact with the external environment until both the first plate 10 and the second plate 20 are broken. And when the bottom plate assembly 100 is impacted, the impact force can enable the second plate 20 to press the connecting rib 30, and the connecting rib 30 can absorb a part of impact force when being deformed, so that the anti-impact capability of the bottom plate assembly 100 can be improved, and the anti-impact capability of the bottom of the battery 1000 can be further improved.

When there is vibration on the battery cell 200, the vibration is conducted to the bottom plate assembly 100 to enable the first plate 10 to squeeze the connecting rib 30, the connecting rib 30 can absorb the vibration on the battery cell 200 when being deformed, similarly, when acting force acts on the battery cell 200, acting force is conducted to the bottom plate assembly 100 to enable the first plate 10 to squeeze the connecting rib 30, and the connecting rib 30 can absorb a part of acting force when being deformed, so that the acting effect of acting force on the battery cell 200 is weakened.

In the process of the operation of the battery 1000, when the battery cell 200 is in thermal runaway, high-temperature and high-pressure gas in the battery cell 200 can flow from the pressure release mechanism to the exhaust channel 11, and then the exhaust channel 11 discharges the high-temperature and high-pressure gas out of the battery 1000, so that the internal temperature and the excessive gas pressure of the battery 1000 are avoided, and the safety of the battery 1000 is improved. In this embodiment, the extending direction of the connection ribs 30 is perpendicular to the extending direction of the exhaust passage 11, so that each connection rib 30 can provide support to the first plate 10 at both sides of the exhaust passage 11 in the extending direction of the exhaust passage 11, the pressure on the single connection rib 30 is smaller, and when the support of the first plate 10 by a certain connection rib 30 at the exhaust passage 11 fails, the other connection ribs 30 can still support the first plate 10. Thereby, the probability of the exhaust passage 11 being crushed can be reduced.

According to the bottom plate assembly 100 of the first embodiment of the present utility model, by arranging the first plate 10 and the second plate 20, the plurality of connection ribs 30 are connected between the first plate 10 and the second plate 20, so that the anti-collision capability of the bottom of the battery 1000 can be improved, the stability of the battery unit 200 in the battery 1000 can be improved, and by arranging the exhaust channel 11, the exhaust channel 11 can discharge the gas of the decompression mechanism to the bottom plate assembly 100, so that the safety of the battery 1000 can be improved, and by arranging the exhaust channel 11, the extension direction of the connection ribs 30 is perpendicular to the extension direction of the exhaust channel 11, the plurality of support ribs support the first plate 10 at two sides of the exhaust channel 11, so that the probability of being crushed during the exhaust of the exhaust channel 11 can be reduced, and the reliability of the battery 1000 in the working process can be improved.

In some embodiments of the present utility model, as shown in fig. 2, the exhaust passage 11 is formed by the first plate 10 being recessed downward. Thus, the exhaust passage 11 can be integrally formed with the first plate 10 at the time of production of the first plate 10, thereby improving production efficiency. And the surface of the first plate 10 matched with the battery cell 200 is smoother, so that the difficulty in designing the battery 1000 and assembling the battery 1000 can be reduced.

In some embodiments of the present utility model, as shown in fig. 5, the ratio between the depth a of the exhaust passage 11 and the total height b of the floor assembly 100 is 50% -90%, for example, the ratio between the depth a of the exhaust passage 11 and the total height b of the floor assembly 100 may be 50%, 70%, or 90%.

Therefore, a sufficient gap can be formed between the exhaust channel 11 and the second plate 20, when the first plate 10 and the second plate 20 press the connecting ribs 30, the probability that the second plate 20 presses the exhaust channel 11 to crush the exhaust channel 11 can be reduced, so that the reliability of the battery 1000 in the working process is improved, and meanwhile, the exhaust channel 11 has a sufficient exhaust volume, and the exhaust efficiency can be ensured in the exhaust process. In addition, in designing the battery 1000, the ratio between the depth a of the exhaust passage 11 and the total height b of the floor assembly 100 can be adjusted to meet more design requirements of the battery 1000.

In some embodiments of the present utility model, as shown in fig. 5, two opposite side walls of the exhaust passage 11 in the first direction extend toward each other in the top-down direction, and an angle c between the two side walls of the exhaust passage 11 and the first plate 10 is 15 ° -60 °, for example, the angle c between the two side walls of the exhaust passage 11 and the first plate 10 may be 15 °, 45 °, or 60 °.

Therefore, the joint of the bottom wall and the side wall of the exhaust channel 11 can have enough connection strength, so that the structural strength of the exhaust channel 11 is ensured, the reliability of the exhaust channel 11 in the working process is improved, and the reliability of the battery 1000 in the working process is further improved. In addition, in designing the battery 1000, the included angle c between the two sidewalls of the exhaust passage 11 and the first plate 10 may be adjusted to meet more design requirements of the battery 1000.

In some embodiments of the utility model, as shown in fig. 5, the ratio between the width d of the open side of the exhaust passage 11 in the first direction and the largest dimension of the pressure relief mechanism (not shown) in the first direction is 1.2-1.5. For example, the ratio of the width d of the opening side of the exhaust passage 11 to the maximum dimension of the pressure relief mechanism in the first direction may be 1.2, 1.3 or 1.5.

That is, the width d of the opening side of the exhaust passage 11 in the first direction is greater than the maximum size of the pressure relief mechanism in the first direction, so that the gas discharged from the pressure relief mechanism can enter the exhaust passage 11 more smoothly, thereby improving the exhaust efficiency of the bottom plate assembly 100 and further improving the safety of the battery 1000. In addition, in designing the battery 1000, the ratio between the width d of the opening side of the exhaust passage 11 in the first direction and the maximum size of the pressure release mechanism in the first direction may be adjusted to meet more design requirements of the battery 1000.

In some embodiments of the present utility model, as shown in fig. 2, the number of the exhaust channels 11 is plural, for example, the number of the exhaust channels 11 may be two, three or four, the plurality of the exhaust channels 11 are arranged at intervals in the first direction, the adjacent two connecting ribs 30 cooperate with the first plate 10 and the second plate 20 to define a communication channel therebetween, the communication channel extends along the first direction, a vent 111 penetrating through a sidewall of the exhaust channel 11 is formed on a sidewall of the exhaust channel 11, and the exhaust channel 11 communicates with the communication channel through the vent 111.

When one of the exhaust channels 11 is provided with a pressure relief structure for exhausting gas, the gas can enter the communication channel through the air vent 111 and then pass through the communication channel to enter the other exhaust channels 11, so that each exhaust channel 11 can exhaust, thereby improving the exhaust efficiency of the bottom plate assembly 100 and further improving the safety of the battery 1000. Wherein, the connecting rib 30 and the first plate 10 and the second plate 20 cooperate to define a communication channel, so that the structure on the bottom plate assembly 100 can be reasonably utilized, the material for independently arranging the communication channel is saved, and the production cost is reduced.

In some embodiments of the present utility model, as shown in fig. 2 and 3, the number of the air vents 111 is plural, for example, two, three or four air vents 111 may be provided, the plurality of air vents 111 are arranged at intervals along the second direction, and a ratio between a distance e between two adjacent air vents 111 in the second direction and a maximum dimension of a pressure release mechanism (not shown in the drawings) in the second direction is 1-3. For example, the ratio between the spacing e of two adjacent vents 111 in the second direction and the maximum dimension of the pressure relief mechanism in the second direction may be 1, 2, or 3.

Therefore, the arrangement of the ventilation openings 111 on the side walls of the exhaust channels 11 is not too dense, so that the side walls of the exhaust channels 11 are ensured to have enough structural strength, and meanwhile, the gas in the exhaust channels 11 can be timely discharged into other exhaust channels 11 through the communication channels, so that the exhaust efficiency of the bottom plate assembly 100 is ensured. In addition, in the design of the battery 1000, the ratio between the interval e between two adjacent air vents 111 in the second direction and the maximum size of the pressure release mechanism in the second direction can be adjusted, so that more design requirements of the battery 1000 can be met.

In some embodiments of the present utility model, as shown in fig. 3, the ratio between the width dimension f of the vent 111 in the second direction and the maximum dimension of the pressure release mechanism (not shown) of the battery cell 200 in the second direction is 1/3 to 1/5, for example, the ratio between the width dimension f of the vent 111 in the second direction and the maximum dimension of the pressure release mechanism of the battery cell 200 in the second direction may be 1/3, 1/4, or 1/5.

Therefore, the area of the air vent 111 on the side wall of the air exhaust channel 11 is not excessively large, so that the side wall of the air exhaust channel 11 is ensured to have enough structural strength, and meanwhile, the air discharged to the air exhaust channel 11 by the pressure release mechanism can be timely discharged into other air exhaust channels 11, so that the air exhaust efficiency of the bottom plate assembly 100 is ensured. In addition, in designing the battery 1000, the ratio between the width dimension f of the vent 111 in the second direction and the maximum dimension of the pressure release mechanism of the battery cell 200 in the second direction may be adjusted to meet more design requirements of the battery 1000.

In some embodiments of the present utility model, as shown in fig. 1, the ratio between the length g of the exhaust passage 11 in the second direction and the total length h of the plurality of battery cells 200 in the second direction is 1.1-1.3, for example, the ratio between the length of the exhaust passage 11 in the second direction and the total length of the plurality of battery cells 200 in the second direction may be 1.1, 1.2, or 1.3.

That is, in the second direction, the length g of the exhaust channel 11 is greater than the total length h of the plurality of battery cells 200, and thus, the gas exhausted from the pressure release mechanism of each battery cell 200 can smoothly enter the exhaust channel 11, thereby improving the safety of the battery 1000 during operation. In addition, in designing the battery 1000, the ratio between the length g of the exhaust passage 11 in the second direction and the total length h of the plurality of battery cells 200 in the second direction may be adjusted to meet more design requirements of the battery 1000.

In some embodiments of the present utility model, as shown in fig. 2 and 4, the connection ribs 30 are disposed obliquely with respect to the horizontal plane, and in the second direction, the oblique directions of the adjacent two connection ribs 30 are the same or opposite. Wherein, through the connecting rib 30 for the horizontal plane slope setting, first board 10 and second board 20 extrusion connecting rib 30 make connecting rib 30 take place deformation easier to promote the absorbing effect of bottom plate assembly 100 to effort, make battery 1000 working process more stable.

When the inclination directions of the adjacent two connection bars 30 are the same, the connection bars 30 are more easily arranged between the first plate 10 and the second plate 20, thereby reducing the difficulty in producing the floor assembly 100; when the inclination directions of the two adjacent connecting ribs 30 are opposite, the connecting ribs 30 have stronger bearing capacity to the acting force of the inclination direction of the connecting ribs 30, so that the load bearing capacity of the bottom plate assembly 100 can be improved, and the probability of crushing the bottom plate assembly 100 by external force can be reduced.

In some embodiments of the present utility model, as shown in fig. 4, the included angle i between the connecting rib 30 and the horizontal plane is 25 ° -65 °, for example, the included angle i between the connecting rib 30 and the horizontal plane may be 25 °, 45 ° or 65 °, so that the deformability of the connecting rib 30 may meet the requirements of energy absorption and vibration reduction of the bottom plate assembly 100, and at the same time, the bearing capacity of the connecting rib 30 may meet the bearing requirement of the bottom plate assembly 100 during the working process. In addition, when designing the battery 1000, the included angle between the connecting rib 30 and the horizontal plane can be adjusted, so as to meet more design requirements of the battery 1000.

In some embodiments of the present utility model, as shown in fig. 4, the ratio between the maximum distance j between two adjacent connection ribs 30 and the height b of the floor assembly 100 in the up-down direction in the second direction is 6-9. For example, the ratio between the maximum distance j between two adjacent connection ribs 30 and the height b of the floor assembly 100 in the up-down direction may be 6, 7 or 9.

Thus, the load bearing capacity of the connecting rib 30 can meet the load bearing requirement of the bottom plate assembly 100 in the working process. In addition, in designing the battery 1000, the ratio of the maximum distance j between two adjacent connection ribs 30 to the height b of the bottom plate assembly 100 in the up-down direction can be adjusted, thereby satisfying more design requirements of the battery 1000.

In some embodiments of the present utility model, the ratio between the height b of the bottom plate assembly 100 and the total height of the case 300 of the battery 1000 in the up-down direction is 1/10-1/4, for example, the ratio between the height b of the bottom plate assembly 100 and the total height of the case 300 of the battery 1000 may be 1/10, 1/7, or 1/4.

Thus, the floor assembly 100 can meet the protection requirements for the bottom of the battery 1000, while there is sufficient space within the housing 300 of the battery 1000 to accommodate other components within the battery 1000. In addition, in designing the battery 1000, the ratio between the height of the bottom plate assembly 100 and the total height of the case 300 of the battery 1000 may be adjusted to meet more design requirements of the battery 1000.

In some embodiments of the present utility model, as shown in FIG. 4, the ratio between the thickness k of the connecting rib 30 and the height b of the floor assembly 100 in the up-down direction is 1/5-1/2. For example, the ratio between the thickness k of the connection rib 30 and the height b of the floor assembly 100 in the up-down direction may be 1/5, 1/3 or 1/2.

Therefore, the bearing capacity of the connecting ribs 30 can meet the bearing requirement of the bottom plate assembly 100, and meanwhile, the deformation capacity of the connecting ribs 30 can meet the energy absorption and vibration reduction requirements of the bottom plate assembly 100. In addition, in designing the battery 1000, the ratio between the thickness k of the connecting rib 30 and the height b of the bottom plate assembly 100 in the up-down direction can be adjusted, thereby satisfying more design requirements of the battery 1000.

A battery 1000 according to an embodiment of the second aspect of the present utility model is described below with reference to fig. 1 to 5.

As shown in fig. 1 and 2, a battery 1000 according to an embodiment of the second aspect of the present utility model includes a case 300 and a plurality of battery cells 200.

Specifically, the case 300 includes the frame 310 and the base plate assembly 100 according to the embodiment of the first aspect of the present utility model, the base plate assembly 100 is connected to the bottom of the frame 310, the plurality of battery cells 200 are disposed in the case 300 and supported on the base plate assembly 100, and at least part of the pressure release mechanisms of the plurality of battery cells 200 are disposed toward the base plate assembly 100 and are communicated with the exhaust channel 11.

Among them, the frame 310 may provide protection for the plurality of battery cells 200 from the sides of the plurality of battery cells 200, and the frame 310 may limit the displacement of the plurality of battery cells 200 in the horizontal direction.

The bottom plate assembly 100 may provide support and protection for the plurality of battery cells 200 from the bottom, and the first plate 10 and the second plate 20 of the bottom plate assembly 100 may provide two-layer protection for the plurality of battery 1000 battery cells 200, and at the same time, the connection rib 30 between the first plate 10 and the second plate 20 may be deformed when the bottom plate assembly 100 is subjected to an external force, thereby absorbing external force and vibration. When the thermal runaway occurs in the battery cell 200, the high-temperature and high-pressure gas discharged from the battery cell 200 enters the exhaust channel 11, wherein the exhaust channel 11 can directly discharge the high-temperature and high-pressure gas, and the exhaust channel 11 can also discharge the gas into other exhaust channels 11 through the communication channels, so that the high-temperature and high-pressure gas is discharged from the plurality of exhaust channels 11 together, and the exhaust efficiency is greatly improved.

According to the battery 1000 of the second embodiment of the present utility model, by providing the above-described base plate assembly 100 according to the first embodiment of the present utility model, the base plate assembly 100 may cooperate with the frame 310 to define the assembly space of the battery cells 200, thereby realizing the assembly of a plurality of battery cells 200. In addition, the floor assembly 100 has strong impact resistance, high exhaust efficiency, and energy absorption and vibration reduction, so that the impact resistance of the bottom of the battery 1000, the safety of the battery 1000, and the stability of the internal components of the battery 1000 can be improved.

In some embodiments of the present utility model, as shown in fig. 1, the battery 1000 further includes: the cooling plate 400, the cooling plate 400 is connected at the top of the frame 310 for absorbing heat generated by the plurality of battery cells 200 during operation, thereby reducing the probability of thermal runaway caused by excessive temperature during operation of the battery 1000, and improving reliability and safety during operation of the battery 1000.

In some embodiments of the present utility model, the cooling plate 400 is adhered to the top of the plurality of battery cells 200 through the heat-conducting structural adhesive, and the heat-conducting structural adhesive has good heat-conducting capability and strong adhesion capability, so that the cooling plate 400 can be installed on the top of the plurality of battery cells 200, and the efficiency of transferring heat of the plurality of battery cells 200 to the cooling plate 400 is improved, thereby ensuring the cooling effect of the cooling plate 400 on the plurality of battery cells 200.

In some embodiments of the present utility model, the floor assembly 100 further comprises: the cooling structure (not shown in the figure) can absorb heat generated by the plurality of battery cells 200 in the working process, thereby further improving the cooling effect on the plurality of battery cells 200 and further improving the reliability and safety of the battery 1000 in the working process.

In some embodiments of the present utility model, the bottom plate assembly 100 is adhered to the bottoms of the plurality of battery cells 200 by a structural adhesive. The structural adhesive ability is strong and vibration can be damped, whereby the reliability of connection of the base plate assembly 100 and the plurality of battery cells 200 can be ensured and the stability of the plurality of battery cells 200 can be improved.

In some embodiments of the present utility model, as shown in fig. 1, the battery 1000 further includes a high voltage distribution box service cover plate 500, a high voltage distribution box service opening 510 facing the high voltage distribution box is formed on the cooling plate 400, and the high voltage distribution box service cover plate 500 covers the high voltage distribution box service opening 510. Therefore, when the high-voltage distribution box needs to be overhauled, an overhauling personnel can open the overhauling hole 510 of the high-voltage distribution box, so that the overhauling personnel can overhaul the high-voltage distribution box conveniently.

In some embodiments of the present utility model, the battery cell 200 includes a pole, and the pole is located at the lower side (not shown) of the battery cell 200, and the bottom plate assembly 100 is formed with a space (not shown) for avoiding the pole, so that the battery 1000 can adapt to more installation situations, thereby meeting more use requirements.

In the description of the present utility model, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., 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 utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

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

Claims (10)

1. A floor assembly supported on a lower side of a battery cell having a pressure relief mechanism disposed toward the floor assembly, the floor assembly comprising:

the first plate and the second plate are horizontal plates and are arranged at intervals up and down, and the first plate is positioned on the upper side of the second plate;

a plurality of connecting ribs connected between the first plate and the second plate, the plurality of connecting ribs extending in a first direction of a horizontal plane and being arranged at intervals in a second direction in the horizontal plane, the first direction being perpendicular to the second direction,

the floor assembly is formed with an upwardly opening exhaust passage extending in the second direction.

2. The floor assembly of claim 1, wherein the vent channel is formed by the first plate being recessed downwardly.

3. The floor assembly of claim 2, wherein the ratio between the depth of the exhaust channel and the total height of the floor assembly in the up-down direction is 50% -90%; and/or the number of the groups of groups,

in the direction from top to bottom, two opposite side walls of the exhaust channel in the first direction extend oppositely, and an included angle between the two side walls of the exhaust channel and the first plate is 15-60 degrees; and/or the number of the groups of groups,

the ratio between the width of the open side of the exhaust passage in the first direction and the maximum dimension of the pressure relief mechanism in the first direction is 1.2-1.5.

4. The floor assembly of claim 2, wherein the number of said exhaust passages is plural, and a plurality of said exhaust passages are spaced apart in said first direction,

two adjacent connecting ribs are matched with the first plate and the second plate to define a communication channel, the communication channel extends along the first direction,

and a vent hole penetrating through the side wall of the exhaust channel is formed in the side wall of the exhaust channel, and the exhaust channel is communicated with the communication channel through the vent hole.

5. The floor assembly of claim 4, wherein a plurality of said vents are spaced apart along said second direction, and the ratio between the spacing between adjacent two of said vents in said second direction and the largest dimension of said pressure relief mechanism in said second direction is 1-3.

6. The floor assembly of claim 1, wherein a ratio between a length of said exhaust channel in said second direction and a total length of a plurality of said battery cells in said second direction is 1.1-1.3.

7. The floor assembly of claim 1, wherein the connecting ribs are inclined with respect to a horizontal plane, and in the second direction, the inclination directions of two adjacent connecting ribs are the same or opposite.

8. The floor assembly of claim 7, wherein the angle between the connecting ribs and the horizontal is 25 ° -65 °; and/or the number of the groups of groups,

in the second direction, the ratio of the maximum distance between two adjacent connecting ribs to the height of the bottom plate assembly in the up-down direction is 6-9.

9. The floor assembly according to claim 7, wherein a ratio between a height of the floor assembly and a total height of a case of the battery in an up-down direction is 1/10 to 1/4; and/or the number of the groups of groups,

the ratio between the thickness of the connecting ribs and the height of the bottom plate assembly in the up-down direction is 1/5-1/2.

10. A battery comprising a housing and a plurality of battery cells, the housing comprising a frame and a floor assembly according to any one of claims 1-9, the floor assembly being connected to the bottom of the frame, a plurality of battery cells being disposed within the housing and supported on the floor assembly, at least a portion of the plurality of battery cells being disposed toward the floor assembly and in communication with the vent passage.