CN218420726U

CN218420726U - Battery pack

Info

Publication number: CN218420726U
Application number: CN202221353789.5U
Authority: CN
Inventors: 陈卓烈; 崔鑫; 吴昌军; 何亚飞
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2023-02-03
Anticipated expiration: 2032-05-31

Abstract

The utility model relates to a battery technology field especially relates to a battery pack. The battery module comprises a plurality of battery core assemblies arranged side by side; battery case includes top cap, bottom plate and surrounding panel, and bottom plate and top cap set up respectively in surrounding panel's bottom and top, and the electric core subassembly sets up in the space that battery case formed, and the top cap is provided with the water injection hole, is provided with on the top cap to be used for the metal rupture disc with the shutoff of water injection hole. Owing to be provided with the metal rupture disc at the top cap, consequently, under the battery package normal operating conditions, the metal rupture disc can play the effect of keeping apart battery module and external world, after catching fire when the electric core subassembly in the battery package, the accessible external force destroys the metal rupture disc, makes the water injection hole that the metal rupture disc covered expose, can realize the mesh of putting out a fire to inside electric core subassembly with the downthehole realization of water pipe disect insertion water injection like this. So can realize in time putting out a fire to electric core subassembly, prevent to cause the incident.

Description

Battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery package.

Background

Because electric core subassembly is located inside the battery box, consequently when battery production thermal runaway, generally spray the temperature of refrigerating fluid such as water in order to reduce electric core subassembly in the box through the outside to the battery box to prevent electric core subassembly burning in the box. When the electric core assembly is out of control due to heat, the temperature of the electric core assembly is increased to possibly cause the combustion of the electric core assembly, external oxygen is not needed for the combustion of the electric core assembly, and the positive and negative short circuits of the electric core assembly release huge energy along with the damage of an internal structure, so that the combustion is facilitated; therefore, if the electric core component is not put out the fire in time, a safety accident can be caused.

Therefore, a battery pack is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery pack can be in introducing battery case with water through battery case after the battery module in the battery case catches fire and realize putting out a fire.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery pack, comprising:

the battery module comprises a plurality of battery core components arranged side by side;

battery case, including top cap, bottom plate and surrounding panel, the bottom plate set up in the bottom of surrounding panel, the top cap set up in the top of surrounding panel, the electric core subassembly set up in the space that battery case formed, the top cap is provided with the water injection hole, be provided with on the top cap be used for with the metal rupture disk of water injection hole shutoff.

As a preferable embodiment of the above battery pack,

the bottom or the top of the metal rupture disk is also provided with a puncture structure, and the puncture structure is used for puncturing the metal rupture disk.

As a preferable embodiment of the above battery pack,

the puncture structure comprises a puncture plate, the puncture plate comprises a plate main body and puncture needles arranged on the plate main body, and the puncture needles are arranged on one side, facing the metal rupture disk, of the plate main body.

As a preferable embodiment of the above battery pack,

the plate body is provided with an alignment hole, the alignment hole and the water injection hole are coaxially arranged, a support beam is arranged in the alignment hole, two ends of the support beam are respectively connected with the inner side wall of the water injection hole, and the felting needle is arranged on the support beam.

As a preferable embodiment of the above battery pack,

the metal rupture disk comprises a flat plate and an arc-shaped plate, the arc-shaped plate is fixedly connected with the flat plate, and a space capable of containing the puncture needle is surrounded by the arc-shaped plate.

As a preferable embodiment of the above battery pack,

the outer surface of the arc-shaped plate is provided with notches which divide the arc-shaped plate into two or more independent blasting subareas.

As a preferable embodiment of the above battery pack,

the wall thickness of the arc-shaped plate is smaller than that of the flat plate.

As a preferable embodiment of the above battery pack,

and a sealing gasket is also arranged between the metal rupture disk and the top cover.

As a preferable embodiment of the above battery pack,

the top cover is upwards provided with a strip-shaped bulge, the bottom of the strip-shaped bulge is provided with an air beam, the air beam and the strip-shaped bulge form an air channel in a surrounding mode, and the water injection hole is formed in the strip-shaped bulge.

As a preferable embodiment of the above battery pack,

the ventilating beam is provided with a plurality of water distribution holes, and the water distribution holes and the electric core assemblies are arranged in a one-to-one correspondence mode.

The utility model discloses beneficial effect:

owing to be provided with the metal rupture disc at the top cap, consequently, under the battery package normal operating conditions, the metal rupture disc can play the effect of keeping apart battery module and external world, after catching fire when the electric core subassembly in the battery package, the accessible external force destroys the metal rupture disc, makes the water injection hole that the metal rupture disc covered expose, can realize the mesh of putting out a fire to inside electric core subassembly with the downthehole realization of water pipe disect insertion water injection like this. So can realize in time putting out a fire to electric core subassembly, prevent to cause the incident.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

fig. 2 is a top view of a battery pack provided by an embodiment of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken at A-A of FIG. 2;

fig. 4 is a schematic structural diagram of the assembled metal rupture disk, puncture plate and sealing gasket provided by the embodiment of the present invention;

fig. 5 is a sectional view at B-B in fig. 4.

Fig. 6 is a schematic structural diagram of a metal rupture disk, a puncture plate and a sealing gasket provided by an embodiment of the present invention;

in the figure:

1. a battery module; 2. a battery case; 21. a top cover; 211. strip-shaped bulges; 2111. a water injection hole; 22. Enclosing a surrounding plate; 3. a metal rupture disc; 31. a flat plate; 32. an arc-shaped plate; 4. puncturing the plate; 41. a plate main body; 411. aligning the holes; 42. a needle; 43. a support beam; 5. a gasket; 6. an explosion-proof valve; 7. and (4) bolts.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, 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. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Need cool down the temperature in order to reduce inside electric core subassembly among the prior art after the battery package thermal runaway to the battery box, prevent electric core subassembly burning, but because its inner structure's destruction can release huge energy and help the burning after electric core subassembly burning, if not in time put out a fire to electric core subassembly and can cause the incident.

Therefore, in the embodiment, a battery pack is provided, which can make water enter into the space formed by the battery shell, and make the water directly contact with fire, thereby achieving the effect of extinguishing fire.

As shown in fig. 1 to 3, the battery pack includes a battery module 1 and a battery case 2, the battery case 2 includes a top cover 21, a bottom plate and an outer surrounding plate 22, the bottom plate is disposed at the bottom of the outer surrounding plate 22, the top cover 21 is disposed at the top of the outer surrounding plate 22, the battery cell assembly is disposed in a space formed by the battery case 2, the top cover 21 is provided with a water injection hole 2111, and the top cover 21 is provided with a metal rupture disc 3 for sealing the water injection hole 2111. The battery module 1 includes a plurality of cell assemblies arranged side by side. The electric core assembly comprises a plurality of electric core assemblies which are arranged in series or in parallel.

Owing to be provided with metal rupture disc 3 at top cap 21, consequently, under the battery package normal operating conditions, metal rupture disc 3 can play the effect of keeping apart battery module 1 with the external world, after the electric core subassembly in the battery package catches fire, accessible external force destroys metal rupture disc 3, makes the water injection hole 2111 that metal rupture disc 3 covered expose, can realize the purpose of putting out a fire to inside electric core subassembly with the water pipe disect insertion water injection hole 2111 like this. So can realize in time putting out a fire to electric core subassembly, prevent to cause the incident.

As shown in fig. 1, the outer surrounding plate 22 is further provided with an explosion-proof valve 6, and the explosion-proof valve 6 can guide the smoke generated by the electric core assembly out of the battery case 2, so as to prevent the smoke in the battery case 2 from causing the increase of the internal temperature at home.

In order to facilitate the quick puncture damage to the metal rupture disk 3, the bottom or the top of the metal rupture disk 3 is also provided with a puncture structure in the embodiment, and the puncture structure is used for puncturing the metal rupture disk 3. Because the bottom or the top at metal rupture disk 3 are provided with the puncture structure, no matter metal rupture disk 3 installs the inside at battery case 2 or outside homoenergetic and is poured out after the electric core subassembly is fired, prevents the production of incident.

In this embodiment, the number of the water injection holes 2111 provided on the battery case 2 may be plural, one water injection hole 2111 is correspondingly provided right above each battery module 1, but the water injection holes 2111 are provided in an excessive number, which also reduces the strength of the battery case 2, for this reason, referring to fig. 1 and 2, in this embodiment, the top cover 21 is formed upward with a strip-shaped protrusion 211, the bottom of the strip-shaped protrusion 211 is provided with an air ventilation beam, the air ventilation beam and the strip-shaped protrusion 211 form an air ventilation channel, and the water injection holes 2111 are provided at the top of the strip-shaped protrusion 211, so that the air ventilation channel is communicated with the water injection holes 2111. Because the both ends of air channel can get into the flue gas, therefore water also can be discharged into battery case 2's inside from air channel's both ends, realizes putting out a fire the mesh to the electric core subassembly at battery case 2 both ends.

Because battery module 1 comprises a plurality of electric core subassemblies, can stretch to other electric core subassemblies when single electric core subassembly catches fire after, for this reason, the ventilation beam is provided with a plurality of water diversion holes in this embodiment, and a plurality of water diversion holes set up with a plurality of electric core subassemblies one-to-one. Therefore, water entering the battery shell 2 can extinguish the electric core assembly in a targeted manner, and the overall fire extinguishing capability of the battery pack is improved.

Specifically, in the present embodiment, as shown in fig. 4 to 6, the puncture structure includes a puncture plate 4, the puncture plate 4 includes a plate body 41 and a puncture needle 42 provided on the plate body 41, and the puncture needle 42 is provided on a side of the plate body 41 facing the metal rupture disk 3. The lancet 42 is integrally formed with the plate body 41, which facilitates manufacture and is obtained by integral molding, although in some embodiments the lancet 42 and the plate body 41 are of a split construction.

The puncture plate 4 needs to allow water to pass through regardless of whether the puncture plate 4 is at the top or the bottom of the metal rupture disk 3, and for this purpose, in the present embodiment, as shown in fig. 5, an alignment hole 411 is provided on the plate main body 41, the alignment hole 411 is disposed coaxially with the water injection hole 2111, a support beam 43 is provided in the alignment hole 411, both ends of the support beam 43 are connected to the inner side walls of the water injection hole 2111, respectively, and the puncture needle 42 is provided on the support beam 43. After the metal rupture disk 3 is ruptured by the puncture needle 42, when the puncture plate 4 is positioned on top of the metal rupture disk 3, water enters the inside of the battery case 2 from the alignment hole 411 of the puncture plate 4, the metal rupture disk 3, and the water injection hole 2111; when the piercing plate 4 is positioned at the bottom of the metal rupture disc 3, water enters the inside of the battery case 2 from the metal rupture disc 3, the alignment hole 411 of the piercing plate 4, and the water injection hole 2111; therefore, the purpose of extinguishing the electric core assembly in case of fire can be realized.

Of course, in some embodiments, the plate main body 41 is a hollow plate, so that water can enter the battery case 2 through the plate main body 41.

Correspondingly, when the metal rupture disk 3 is integrally arranged in parallel with the plate main body 41, a slight pressure is applied to cause the metal rupture disk 3 to be pierced, when the battery pack is not in a fire condition, the metal rupture disk 3 is pierced to cause the battery module 1 to be exposed, in order to prevent the above problem, with reference to fig. 5 and 6, in the present embodiment, the metal rupture disk 3 includes a flat plate 31 and an arc plate 32, the arc plate 32 is fixedly connected with the flat plate 31, and the arc plate 32 encloses a space capable of accommodating the puncture needle 42. The lancet 42 is located in the space defined by the curved plate 32, so that the lancet 42 is prevented from piercing the metal rupture disk 3 when water injection is not required, and the purpose of accommodating the lancet 42 is achieved.

Further, when the puncturing plate 4 is located at the bottom of the metal rupture disk 3, the metal rupture disk 3 needs to be pressed to contact with the puncturing needle 42, in order to ensure that the arc plate 32 is pressed, in this embodiment, the wall thickness of the arc plate 32 is smaller than that of the flat plate 31, so that the metal rupture disk 3 can be pressed downward as a whole, and the purpose of being punctured is achieved.

Of course, in order to further improve the piercing ability of the metal rupture disk 3, in the present embodiment, the outer surface of the arc plate 32 is provided with notches (not shown in the figure), and the notches divide the arc plate 32 into two or more independent rupture partitions, which can facilitate the overall piercing of the metal rupture disk 3. The notch arrangement reduces the strength of the arc-shaped plate 32, so that after the puncture needle 42 pierces through the metal rupture disk 3, the water pipe enters the water injection hole 2111 from the arc-shaped plate 32, and the arc-shaped plate 32 is squeezed in the entering process, and the area of the damaged part is continuously enlarged due to the notch arrangement, so that the purpose that the water pipe enters the water injection hole 2111 is achieved.

Optionally, in the present embodiment, as shown in fig. 6, a sealing gasket 5 is further disposed between the metal rupture disk 3 and the top cover 21. Sealed 5 can prevent to produce the gap between metal rupture disc 3 and the battery case 2 of filling up, and inside external object entered into battery case 2 through the gap, influence battery module 1's work.

Of course, in other embodiments, the metal rupture disk 3 is welded to the top cover 21, and this connection method can also eliminate the gap between the metal rupture disk 3 and the top cover 21 to prevent foreign objects from entering the battery case 2. Including but not limited to particles, moisture, etc.

In order to facilitate the installation of the metal rupture disk 3, in the present embodiment, the metal rupture disk 3 is fixedly connected to the top cover 21 by a fastener. Wherein the fastener can be bolt 7 or screw, because bolt 7 and screw are standard part, so can reduce the whole manufacturing cost of battery package, can also shorten development time. In detail, the fastening member is a bolt 7 in the present embodiment, which facilitates installation of the metal rupture disc 3.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A battery pack, comprising:

a battery module (1) including a plurality of cell assemblies arranged side by side;

battery case (2), including top cap (21), bottom plate and outer bounding wall (22), the bottom plate set up in the bottom of outer bounding wall (22), top cap (21) set up in the top of outer bounding wall (22), the electric core subassembly set up in the space that battery case (2) formed, top cap (21) are provided with water injection hole (2111), be provided with on top cap (21) and be used for with metal rupture disc (3) of water injection hole (2111) shutoff.

2. The battery pack according to claim 1, wherein the bottom or top of the metal rupture disc (3) is further provided with a piercing structure for piercing the metal rupture disc (3).

3. The battery pack according to claim 2, wherein the piercing structure comprises a piercing plate (4), the piercing plate (4) comprising a plate body (41) and a piercing pin (42) provided on the plate body (41), the piercing pin (42) being provided on a side of the plate body (41) facing the metal rupture disc (3).

4. The battery pack according to claim 3, wherein the plate body (41) is provided with an alignment hole (411), the alignment hole (411) is coaxially arranged with the water injection hole (2111), a support beam is arranged in the alignment hole (411), both ends of the support beam are respectively connected with the inner side wall of the water injection hole (2111), and the puncture needle (42) is arranged on the support beam.

5. A battery pack as claimed in claim 3, wherein the metal rupture disc (3) comprises a flat plate (31) and an arc-shaped plate (32), the arc-shaped plate (32) is fixedly connected with the flat plate (31), and the arc-shaped plate (32) encloses a space capable of accommodating the puncture needle (42).

6. The battery pack according to claim 5, wherein the outer surface of the arc plate (32) is provided with notches which divide the arc plate (32) into two or more independent blasting partitions.

7. A battery pack according to claim 5, wherein the curved plate (32) has a wall thickness smaller than that of the flat plate (31).

8. The battery pack according to claim 1, wherein a sealing gasket (5) is further provided between the metal rupture disc (3) and the top cover (21).

9. The battery pack according to any one of claims 1 to 8, wherein the top cover (21) is formed with a bar-shaped protrusion (211) upward, an air vent beam is provided at the bottom of the bar-shaped protrusion (211), the air vent beam and the bar-shaped protrusion (211) define an air vent channel, and the water injection hole (2111) is provided on the bar-shaped protrusion (211).

10. The battery pack according to claim 9, wherein the ventilation beam is provided with a plurality of water distribution holes, and the plurality of water distribution holes are arranged in one-to-one correspondence with the plurality of electric core assemblies.