CN218182410U - Battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and more particularly to a battery device, which includes: a case and a plurality of batteries, the case having a bottom plate; the batteries are arranged on one side of the bottom plate, and the batteries are distributed on the bottom plate in N rows; the battery exhaust device comprises a base plate, a plurality of batteries and an exhaust area, wherein the base plate is internally provided with a plurality of exhaust cavities, the projection of the exhaust cavities on the surface of the base plate facing the batteries is the exhaust area, the exhaust area comprises a first area and a second area, at least two rows of batteries are arranged in the first area, a first hole is formed in the first area and communicated with the exhaust cavities, a second hole is formed in the second area and communicated with the exhaust cavities, and the second area is arranged at the end part of the first area and communicated with the exhaust cavities. Can transmit battery spun high temperature high-pressure gas to the exhaust chamber when battery thermal runaway, derive by the second hole in second district again, avoid high temperature high-pressure gas to influence battery on every side to control thermal runaway effectively.

Description

Battery device

Technical Field

The present disclosure relates to the field of battery technologies, and particularly, to a battery device.

Background

With the development and progress of technology, electric vehicles are increasingly used. A battery pack is provided in an electric vehicle for storing electric energy and supplying energy to the electric vehicle. A plurality of batteries are generally provided in a battery pack, and a battery case is exploded when the batteries are thermally runaway, thereby allowing high-temperature and high-pressure gas inside the batteries to escape. The high temperature and high pressure gas ejected from the battery may cause the surrounding batteries to be affected, thereby causing more thermal runaway of the battery.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The purpose of this disclosure is to provide a battery device, and then reduces the influence of battery thermal runaway to whole battery device to at least some extent.

The present disclosure provides a battery device, including:

a case having a bottom plate;

the batteries are arranged on one side of the bottom plate and distributed on the bottom plate in N rows, and N is a positive integer greater than or equal to 2;

the battery pack comprises a base plate, a plurality of batteries and a plurality of air exhaust chambers, wherein the base plate is internally provided with a plurality of air exhaust chambers, the projection of the air exhaust chambers on the surface of the base plate facing the batteries is an air exhaust area, the air exhaust area comprises a first area and a second area, at least two rows of batteries are arranged in the first area, a first hole is formed in the first area and communicated with the air exhaust chambers, a second hole is formed in the second area and communicated with the air exhaust chambers, and the end part of the first area is arranged in the second area.

The battery device that this disclosed embodiment provided is provided with a plurality of exhaust chambeies on the bottom plate, through set up first hole intercommunication exhaust chamber in the first district that corresponds with the battery, can transmit battery spun high temperature high-pressure gas to the exhaust chamber when battery thermal runaway, derives by the second hole in second district again, avoids high temperature high-pressure gas to influence battery on every side to control thermal runaway's scope effectively. And the multiple rows of batteries correspond to one exhaust cavity, so that the situation that fragments burst out when the batteries are out of control due to the fact that the volumes of the exhaust cavities are too small are prevented from blocking the exhaust cavities or the second holes.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It should be apparent that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived by those of ordinary skill in the art without inventive effort.

Fig. 1 is a schematic structural diagram of a battery device according to an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic view of a backplane provided by an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic view of another backplane provided by exemplary embodiments of the present disclosure;

fig. 4 is a schematic structural diagram of a battery provided in an exemplary embodiment of the present disclosure.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" object or "an" object are also intended to mean one of possibly multiple such objects.

The terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood as a specific case by a person skilled in the art.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

The present exemplary embodiment provides a battery device, as shown in fig. 1, the battery device includes a case 10 and a plurality of batteries 20, the case 10 having a bottom plate 11; the batteries 20 are arranged on one side of the bottom plate 11, and the batteries 20 are distributed on the bottom plate 11 in N rows, wherein N is a positive integer greater than or equal to 2; as shown in fig. 2 and fig. 3, a plurality of air exhaust cavities 101 are disposed in the bottom plate 11, a projection of the air exhaust cavities 101 on a surface of the bottom plate 11 facing the cells 20 is an air exhaust area, the air exhaust area includes a first area 111 and a second area 112, the first area 111 is provided with at least two rows of cells 20, the first area 111 is provided with first holes 102, the first holes 102 are communicated with the air exhaust cavities 101, the second area 112 is disposed at an end of the first area 111, the second area 112 is provided with second holes 103, and the second holes 103 are communicated with the air exhaust cavities 101.

The battery device provided by the embodiment of the disclosure is provided with the plurality of exhaust cavities on the bottom plate, the first area 111 corresponding to the battery 20 is provided with the first hole 102 to be communicated with the exhaust cavity 101, so that high-temperature and high-pressure gas sprayed by the battery 20 can be transmitted to the exhaust cavity 101 when the battery 20 is in thermal runaway, and then the high-temperature and high-pressure gas is led out through the second hole 103 of the second area 112, thereby preventing the high-temperature and high-pressure gas from influencing the surrounding battery 20, and effectively controlling the range of the thermal runaway. And the multiple rows of batteries 20 correspond to one air exhaust cavity 101, so that the situation that the air exhaust cavity 101 or the second hole 103 is blocked by fragments blown out when the batteries 20 are out of control due to the fact that the volume of the air exhaust cavity 101 is too small is avoided.

The following will explain each part of the battery device provided by the embodiment of the present disclosure in detail:

the case 10 may include a base plate 11 and a rim 12, the rim 12 being coupled to the base plate 11, and the rim 12 surrounding the base plate 11. The frame 12 forms an accommodation space in which the battery 20 is disposed on the top surface side of the base plate 11. The frame 12 and the base plate 11 may be connected by one or more of welding, bolting, riveting and gluing.

At least one exhaust cavity 101 is arranged in the bottom plate 11, and the exhaust cavity 101 is used for containing high-temperature and high-pressure gas sprayed out from the battery 20 when the battery 20 is in thermal runaway. When a plurality of air discharge chambers 101 are provided in the bottom plate 11, the air discharge chambers 101 are independent of each other, and each air discharge chamber 101 corresponds to at least two rows of the batteries 20. The plurality of exhaust chambers 101 may be arranged in a direction perpendicular to the column direction of the cells 20 ((Y direction in fig. 3)).

The projection area of the exhaust chamber 101 on the side (top side) of the bottom plate 11 facing the battery 20 is an exhaust area, and the exhaust area includes a first area 111 and a second area 112. The multiple rows of batteries 20 are arranged in the first area 111, the first area 111 is provided with first holes 102, the first holes 102 are communicated with exhaust holes, and the first holes 102 are used for leading high-temperature and high-pressure gas sprayed by the batteries 20 into the exhaust cavity 101 when the batteries 20 are in thermal runaway.

The second area 112 is arranged at the end of the first area 111, the second area 112 is provided with a second hole 103, the second hole 103 is communicated with the exhaust cavity 101, and the second hole 103 is used for leading out the gas in the exhaust cavity 101. In practical applications, the second region 112 may be disposed at one end of the first region 111, or the second regions 112 may be disposed at both ends of the first region 111. When the second zones 112 are disposed at both ends of the first zone 111, the second holes 103 are disposed in each of the second zones 112, that is, the exhaust chamber 101 can exhaust air from both ends.

For example, the bottom plate 11 may be a rectangular parallelepiped or an approximately rectangular parallelepiped structure, and a plurality of rectangular parallelepiped exhaust chambers 101 are disposed in the bottom plate 11, and the plurality of rectangular parallelepiped exhaust chambers 101 are juxtaposed in a direction perpendicular to the row direction of the batteries 20. When the exhaust chamber 101 has a rectangular parallelepiped structure, the exhaust area is a rectangular area. The second zone 112 is located at the end of the exhaust zone in the longitudinal direction, and the second zone 112 is provided at one or both ends of the exhaust zone in the longitudinal direction.

The first region 111 is provided with at least two rows of first holes 102, one first hole 102 for each cell 20. The end of the battery 20 facing the base plate 11 is provided with an explosion-proof valve, the projection of which on the base plate 11 at least partially coincides with the corresponding first hole 102.

The first hole 102 may be a circular hole, and correspondingly, the explosion-proof valve on the battery 20 may also be circular or approximately circular. The diameter of the first hole 102 is equal to or larger than the diameter of the explosion-proof valve. The second hole 103 may be a rectangular hole or an approximately rectangular hole. The dimension of the second holes 103 is larger than the dimension of the first holes 102 in the direction perpendicular to the row direction of the cells 20, for example, the dimension of the second holes 103 is L1, the dimension of the gas discharge chamber 101 is L2, and 0.5L2. Ltoreq.L 1. Ltoreq.L 2 in the direction perpendicular to the row direction of the cells 20. By setting the size of the second holes 103 larger than the size of the first holes 102 in the direction perpendicular to the row direction of the batteries 20, the exhaust area of the exhaust hole can be secured, and clogging of the second holes 103 with debris generated when the batteries 20 burst can be avoided. And providing the second hole 103 as a long hole can save space in the row direction of the batteries 20.

In a possible embodiment of the present disclosure, the base plate 11 may include a first plate 110, a second plate 120, and a separation plate 130, the second plate 120 and the first plate 110 being disposed opposite to each other with a predetermined interval therebetween; the partition plates 130 are disposed between the first plate 110 and the second plate 120 to form a plurality of exhaust chambers 101 independent of each other.

Wherein the first plate 110 and the second plate 120 may be disposed in parallel, and the first plate 110 is located on a side of the second plate 120 adjacent to the battery 20. The first and second regions 111 and 112 are provided to the first plate 110, the first and second holes 102 and 103 are provided to the first plate 110, and the first and second holes 102 and 103 penetrate the first plate 110.

One or more partition plates 130 may be disposed between the first plate 110 and the second plate 120, and when the bottom plate 11 includes a plurality of partition plates 130, the plurality of partition plates 130 are disposed in parallel between the first plate 110 and the second plate 120. For example, the bottom plate 11 includes N partition plates 130, the N partition plates 130 are disposed in parallel to partition an area between the first plate 110 and the second plate 120 into N +1 exhaust chambers 101.

Edges of the first plate 110 and the second plate 120 are connected to close a space between the first plate 110 and the second plate 120. That is, a sealed chamber is formed between the first plate 110 and the second plate 120, and the sealed chamber is partitioned into a plurality of exhaust chambers 101 by partition plates 130.

For example, the bottom plate 11 provided by the embodiment of the present disclosure further includes a side plate 140, the side plate 140 surrounds the first plate 110 and the second plate 120, and the first plate 110 and the second plate 120 are respectively connected to the side plate 140. For example, the first plate 110 and the second plate 120 are rectangular or approximately rectangular plates. The side plate 140 includes a first edge, a second edge, a third edge and a fourth edge, the first edge, the second edge, the third edge and the fourth edge are sequentially connected end to end, and the first edge, the second edge, the third edge and the fourth edge are respectively connected to the first plate 110 and the second plate 120 correspondingly.

Wherein the first and third sides may be disposed parallel to the separation plate 130, and the second and third sides may be disposed perpendicular to the separation plate 130. That is, the first and third sides are disposed along the long side of the base plate 11, and the second and fourth sides are disposed along the short side of the base plate 11.

It is understood that a hem facing the second plate 120 may be provided on an edge of the first plate 110, and the hem on the first plate 110 and the second plate 120 are connected. Alternatively, a hem facing the first plate 110 is provided on an edge of the second plate 120, and the hem on the second plate 120 is connected with the first plate 110. Alternatively, a first flap facing the second plate 120 is provided on the first plate 110, a second flap facing the first plate 110 is provided on the second plate 120, and the first flap and the second flap are connected.

It should be noted that, in the embodiment of the present disclosure, the first plate 110, the second plate 120, the partition plate 130, and the side plate 140 may be a split structure, for example, the first plate 110 and the second plate 120 are respectively welded to the partition plate 130 and the side plate 140. Alternatively, the first plate 110, the second plate 120, the partition plate 130 and the side plate 140 may be a single-piece structure, for example, the bottom plate 11 may be formed by profile extrusion.

When the bottom plate 11 is an extrusion, the first and third edges of the side plate 140 may be integrally formed with the first and second plates 110 and 120 and the separation plate 130, and the second and fourth edges of the side plate 140 may be connected to the corresponding positions of the first and second plates 110 and 120 after the extrusion is formed.

The first holes 102 and the second holes 103 are provided in the first plate 110, and a plurality of first holes 102 in a row of the first holes 102 are arranged in the longitudinal direction of the first plate 110. The second holes 103 are provided at the ends of one row of the first holes 102, and one second hole 103 may correspond to a plurality of rows of the first holes 102. This ensures that the vent chamber 101 and the second hole 103 have sufficient widths to prevent debris generated during the explosion of the battery 20 from clogging the second hole 103 or the vent chamber 101. And, the second hole 103 is formed in the first plate 110, that is, the second hole 103 is formed in the top of the bottom plate 11, so that the debris from the blasting of the battery 20 is deposited on the bottom of the exhaust chamber 101, thereby ensuring that the second hole 103 is not blocked.

The size of the second holes 103 is larger than the size of the first holes 102 in the column direction perpendicular to the batteries 20. For example, the second hole 103 may be a long kidney-shaped hole, and the length direction of the second hole 103 is perpendicular to the column direction of the battery 20. Of course, in practical applications, the second hole 103 may also be a rectangular hole, and the embodiment of the disclosure is not limited thereto.

Further, in order to ensure that the second holes 103 are not blocked, the size of the second holes 103 is L1 and the size of the vent chamber 101 is L2 in the direction perpendicular to the row of the cells 20, wherein 0.5L2. Ltoreq.L 1. Ltoreq.L 2. For example, the width of the second hole 103 is 0.5l2, 0.6l2, 0.7l2, 0.8l2, L2, or the like.

Of course, in practical applications, the rows of first holes 102 may also be connected, for example, the rows of first holes 102 are connected to each other to form a through long hole. Or several batteries 20 in a row of batteries 20 are communicated to form a plurality of air exhaust long holes, and each air exhaust long hole corresponds to at least two batteries 20. That is, in the embodiment of the present disclosure, one row of the batteries 20 corresponds to one row of the first holes 102, and the shape of the first holes 102 is not limited to the above shape.

In the embodiment of the present disclosure, the bottom plate 11 may be an integral bottom plate 11, or the bottom plate 11 may also be a bottom plate 11 formed by splicing a plurality of sub-plates, and the like, which is not specifically limited in the embodiment of the present disclosure.

The frame 12 is connected to the bottom plate 11, and a receiving space is formed in the bottom plate 11, and the battery 20 is disposed in the receiving space. The frame 12 may surround the bottom plate 11, and the top of the frame 12 is higher than the top of the bottom plate 11, so that an accommodating space is formed at the top of the bottom plate 11. Or the frame 12 may be disposed on the top of the bottom plate 11 and enclose an accommodating space on the top of the bottom plate 11. The frame 12 and the bottom plate 11 may be connected by one or more of welding, bolting, riveting, gluing, etc.

By way of example, the bezel 12 may have a rectangular or approximately rectangular configuration. The frame 12 may include a first edge beam, a second edge beam, a third edge beam, and a fourth edge beam, which are connected end to end in sequence. For example, the first and third side beams may be disposed along the long side of the base plate 11, and the second and fourth side beams may be disposed along the short side of the base plate 11.

In a possible embodiment of the present disclosure, when the frame 12 surrounds the bottom plate 11, a portion of the edge beam may be used as the side plate 140 of the bottom plate 11. For example, the first and third side beams respectively block the openings at the long sides of the bottom plate 11, and the second and fourth side beams respectively block the openings at the short sides of the bottom plate 11. Alternatively, the base plate 11 is an extruded profile, and the first and third side beams are connected to the long side of the base plate 11 (without a sealing function), and the second and fourth side beams are connected to the short side of the base plate 11 to seal the exhaust chamber 101.

Optionally, in some possible embodiments, an explosion-proof valve may be further disposed on the frame 12, for example, the explosion-proof valve may be disposed on the first side beam, the second side beam, the third side beam or the fourth side beam. The explosion-proof valve is used for bursting when the internal pressure of the battery device is greater than a preset value so as to release the pressure of the battery device.

The second region may be located adjacent to the frame 12, i.e. the second aperture 103 is adjacent to the frame 12. For example, the second aperture 103 may be adjacent to the second and/or fourth side beam. On this basis, the explosion-proof valve can be arranged on the second side beam and/or the fourth side beam, and the position of the explosion-proof valve is opposite to that of the second hole 103.

The battery 20 provided by the embodiment of the present disclosure may be a cylindrical battery 20, and the battery device is provided with a plurality of batteries 20, and the plurality of batteries 20 are distributed in at least two rows. For example, the plurality of cells 20 may be arranged in an array. At least two rows of cells 20 in the array of cells 20 form a battery 20 pack, and a battery 20 pack is disposed in an exhaust area.

An explosion-proof valve is arranged at one end of the battery 20 facing the bottom plate 11, and the explosion-proof valve is used for exploding when the battery 20 is in thermal runaway so as to relieve the pressure of the battery 20. The explosion-proof valve on the battery 20 may correspond one-to-one to the first hole 102 on the bottom plate 11. Or one first hole 102 may correspond to a plurality of explosion-proof valves.

For example, as shown in fig. 4, a battery 20 provided in an embodiment of the present disclosure may include a casing 21, a battery cell 22, and a pole 23, where the casing 21 has an accommodating cavity, the battery cell 22 is disposed in the accommodating cavity in the casing 21, the pole 23 is disposed in the casing 21, and the pole 23 at least partially protrudes into the accommodating cavity.

The case 21 serves to form an outer contour of the battery 20 and protect devices inside the battery 20. The housing 21 has a hollow cylindrical structure, for example, the housing 21 may include a housing main body 211, a first end plate 212 and a second end plate 213, the housing main body 211 has a cylindrical structure with two open ends, and the first end plate 212 and the second end plate 213 are respectively disposed at two ends of the housing main body 211.

Among them, the case main body 211, the first end plate 212, and the second end plate 213 may be a unitary structure, or the case main body 211 and the first end plate 212 or the second end plate 213 may be a unitary structure in the embodiment of the present disclosure.

The pole 23 may be disposed on the first end plate 212, and a mounting hole is disposed on the first end plate 212, and the pole 23 is inserted into the mounting hole. One part of the pole 23 is located outside the housing 21 and is used for connecting external devices such as a bus bar, and the other part of the pole 23 is located inside the housing 21 and is used for connecting the battery cell 22.

The tab of the battery cell 22 near one end of the terminal 23 is a positive tab, and the positive tab is connected to the terminal 23, that is, the terminal 23 is the positive terminal 23. The negative electrode of the battery 20 may be implemented by the case 21, and the negative electrode tab may be electrically connected to the case 21 of the battery 20, so that the case 21 of the battery 20 made of a metal material serves as the negative electrode.

When the electrode post 23 is a first electrode of the battery 20 and the case 21 is a second electrode of the battery 20, the electrode post 23 and the case 21 of the battery 20 need to be insulated. For example, an insulating member may be disposed between the terminal 23 and the housing 21 to insulate the housing 21 and the terminal 23 of the battery 20.

In the disclosed embodiment, the explosion-proof valve of the battery 20 is provided at one end of the battery 20 near the bottom plate 11. In a possible embodiment, the pole 23 is disposed at an end of the housing 21 away from the bottom plate 11, i.e. the first end plate 212 is away from the bottom plate 11, and the second end plate 213 is close to the bottom plate 11. An explosion proof valve may be provided at the second end plate 213. For example, the explosion proof valve is a score on second end panel 213 or the explosion proof valve is a thinned area on second end panel 213.

In another possible embodiment of the present disclosure, the pole 23 may be disposed at an end of the housing 21 close to the bottom plate 11, that is, the first end plate 212 is close to the bottom plate 11, and the second end plate 213 is far away from the bottom plate 11. At this time, the explosion-proof valve may be the first end plate 212 or the explosion-proof valve may be provided to the pole 23.

When the explosion-proof valve is provided in first end plate 212, the explosion-proof may be a scored or thinned area on the first end adjacent pole 23. When the explosion-proof valve is arranged on the pole 23, a through hole can be arranged on the pole 23, the explosion-proof valve is of a plate-shaped structure, and the explosion-proof valve covers the through hole on the pole 23.

It should be noted that, in the above embodiment, the battery 20 provided in the embodiment of the present disclosure is described by taking the cylindrical battery 20 as an example, but in practical applications, the battery 20 in the embodiment of the present disclosure may also be a square battery 20, and the embodiment of the present disclosure is not limited thereto.

According to the battery device provided by the embodiment of the disclosure, the first hole 102 is arranged in the first area 111 corresponding to the battery 20 and communicated with the exhaust cavity 101, so that high-temperature and high-pressure gas sprayed out from the battery 20 can be transmitted to the exhaust cavity 101 when the battery 20 is in thermal runaway, and then the high-temperature and high-pressure gas is led out through the second hole 103 of the second area 112, thereby preventing the high-temperature and high-pressure gas from influencing the surrounding battery 20, and effectively controlling the range of the thermal runaway. And the multiple rows of batteries 20 correspond to one air exhaust cavity 101, so that the situation that the air exhaust cavity 101 or the second hole 103 is blocked by fragments blown out when the batteries 20 are out of control due to the fact that the volume of the air exhaust cavity 101 is too small is avoided.

The battery device provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery is used in the electric vehicle, the plurality of battery devices can be battery packs, and the battery packs are mounted on the electric vehicle to provide energy for the electric vehicle.

In practical application, the battery pack can be mounted on a frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modular battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A battery device, characterized in that the battery device comprises:

a case having a bottom plate;

the batteries are arranged on one side of the bottom plate and distributed on the bottom plate in N rows, and N is a positive integer greater than or equal to 2;

the battery pack comprises a base plate, a plurality of batteries and a plurality of air exhaust chambers, wherein the base plate is internally provided with a plurality of air exhaust chambers, the projection of the air exhaust chambers on the surface of the base plate facing the batteries is an air exhaust area, the air exhaust area comprises a first area and a second area, at least two rows of batteries are arranged in the first area, a first hole is formed in the first area and communicated with the air exhaust chambers, a second hole is formed in the second area and communicated with the air exhaust chambers, and the end part of the first area is arranged in the second area.

2. The battery device of claim 1, wherein said first region is provided with at least two rows of first apertures, one for each of said cells.

3. The battery device according to claim 2, wherein an end of the battery facing the base plate is provided with an explosion-proof valve, and a projection of the explosion-proof valve on the base plate at least partially coincides with the corresponding first hole.

4. The battery device of claim 1, wherein the base plate comprises:

a first plate;

a second plate disposed opposite to the first plate with a predetermined interval therebetween;

a partition plate disposed between the first plate and the second plate to form a plurality of the exhaust chambers independent of each other between the first plate and the second plate.

5. The battery device of claim 4, wherein the base plate comprises a plurality of separator plates disposed in parallel between the first plate and the second plate.

6. The battery device according to claim 1, wherein the second hole size is larger than the first hole size in a direction perpendicular to the column direction of the batteries.

7. The battery device according to claim 6, wherein the second hole is an elongated kidney-shaped hole, and a length direction of the second hole is perpendicular to a column direction of the batteries.

8. The battery device according to claim 1, wherein the second hole has a size L1 and the vent chamber has a size L2 in a direction perpendicular to the column direction of the cells, wherein 0.5l2 ≦ L1 ≦ L2.

9. The battery device of claim 1, wherein said second regions are disposed on both ends of said first region, each of said second regions being provided with a second aperture.

10. The battery device of any of claims 1-9, wherein the battery is a cylindrical battery.

Images