CN213520178U

CN213520178U - Power battery cover plate assembly and power battery

Info

Publication number: CN213520178U
Application number: CN202022673227.6U
Authority: CN
Inventors: 励建炬; 邱宜升; 吴林峰
Original assignee: Shenzhen Kedali Industry Co ltd
Current assignee: Shenzhen Kedali Industry Co ltd; Shenzhen Kedali Ind Co Ltd
Priority date: 2020-09-18
Filing date: 2020-11-18
Publication date: 2021-06-22
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a power battery cover plate subassembly and power battery, this power battery cover plate subassembly include lid and rigidity layer. The lid is made of aluminum. The rigid layer is arranged on the top wall of the cover body and is made of stainless steel, and the cross section area of the rigid layer is not smaller than that of the cover body. The cover body and the rigid layer are integrally formed. The rigid layer can effectively prevent the cover body from expanding under the external action, so that the cover plate assembly can effectively avoid the problems of battery failure and battery safety caused by the bulge of the cover body, and the safety and the service life of the cover plate assembly are improved.

Description

Power battery cover plate assembly and power battery

Technical Field

The utility model relates to a power battery technical field especially relates to a power battery cover plate subassembly and power battery.

Background

In the long-term use process of the power battery in the prior art, certain pressure can be generated during charging and discharging of the battery, the cover plate is easy to bulge under the long-term action of the pressure, and the cover plate is easy to cause the failure of the power battery and greatly reduce the safety of the power battery after bulging.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a power battery cover plate subassembly can effectively avoid because the apron bulges and the battery inefficacy and the battery safety problem that lead to, improves the security and the life of apron subassembly.

Another object of the utility model is to provide a power battery cover plate subassembly can prevent that power battery leads to the apron to appear the phenomenon of bulging at the charge-discharge in-process, improves power battery's security.

For realizing the technical effect, the utility model discloses a power battery cover plate subassembly and power battery's technical scheme as follows:

a power battery cover plate assembly, comprising: a lid body made of aluminum; the rigid layer is arranged on the top wall of the cover body and is made of stainless steel, and the cover body and the rigid layer are integrally formed.

Furthermore, two bulges are arranged on the bottom wall of the cover body, through holes penetrating through the cover body and the rigid layer are formed in the bottom wall of each bulge, and the through holes are used for installing the pole column pieces.

Further, a step is formed in the through hole, and the step is used for supporting the pole column piece.

Further, the power battery cover plate component further comprises a plurality of mounting protrusions, the mounting protrusions are arranged on the top wall of the rigid layer, and each mounting protrusion surrounds one through hole.

Further, at least one mounting protrusion comprises a plurality of protrusions which are evenly distributed around the central axis of the through hole.

Further, the power battery cover plate component further comprises a counter bore, and the counter bore is formed in the top wall of the rigid layer and penetrates through the cover body and the rigid layer.

Further, power battery cover plate subassembly still includes the extension arch, it establishes on the diapire of lid to extend the arch, it encircles to extend the arch the counter sink setting.

Further, power battery cover plate subassembly still includes the articulamentum, articulamentum integrated into one piece in on the diapire of lid, the articulamentum is prepared by aluminium and forms, the articulamentum is used for being connected with power battery's casing.

Further, the cross-sectional area of the connection layer gradually decreases in a direction away from the cover body.

A power cell comprising the power cell cover assembly described above.

The utility model discloses a beneficial effect does: establish the rigidity layer on the lid roof better rigidity and be difficult to appear deformation, even the lid produces the deformation trend under the inside pressure effect of power battery, can play limiting displacement to the deformation of lid with lid integrated into one piece's rigidity layer, thereby make the lid keep the original state under the restriction on rigidity layer, make the apron subassembly still can keep the original state when power battery is inside to appear pressure, thereby ensure to set up monomer electricity core or module in power battery inside and in groups the back, potential safety hazards such as battery failure that can not appear leading to by the lid inflation, the life and the security performance of apron subassembly have been showing and have been improved. Meanwhile, the rigid layer is made of stainless steel, so that the rigid effect of the rigid layer can be conveniently realized, and meanwhile, the production cost of the power battery cover plate assembly can be reduced. According to the utility model discloses a shell subassembly because the rigidity layer can prevent effectively that the lid from appearing the inflation phenomenon under external effect, can effectively avoid because the lid is bloated and the battery inefficacy and the battery safety problem that lead to the security and the life of shell subassembly have been improved.

The utility model discloses an another beneficial effect does: due to the power battery cover plate assembly, the cover plate can be prevented from bulging in the charging and discharging process of the power battery, and the safety of the power battery is improved.

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

Drawings

Fig. 1 is a schematic structural diagram of a power battery cover plate assembly provided in embodiment 1 of the present invention;

fig. 2 is a schematic view of an internal structure of a power battery cover plate assembly provided in embodiment 1 of the present invention;

FIG. 3 is an enlarged partial schematic view of FIG. 2 at A;

fig. 4 is a schematic structural diagram of a power battery cover plate assembly provided in embodiment 2 of the present invention;

fig. 5 is a schematic diagram of an internal structure of a power battery cover plate assembly provided in embodiment 2 of the present invention;

fig. 6 is a partially enlarged structural view at B in fig. 5.

Reference numerals

1. A cover body; 2. a rigid layer; 3. a connecting layer; 4. a projection; 5. a through hole; 6. mounting a boss; 7. a countersunk hole; 8. an extension protrusion.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

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; either directly or indirectly through intervening media, either internally or in any other relationship. 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.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The specific structure of the power battery cover plate assembly according to the embodiment of the present invention is described below with reference to fig. 1 to 3.

As shown in fig. 1-3, fig. 1 discloses a power battery cover plate assembly comprising a cover body 1, a rigid layer 2 and a connection layer 3. The lid body 1 is made of aluminum. The rigid layer 2 is arranged on the top wall of the cover body 1, the rigid layer 2 is made of stainless steel, and the cross section area of the rigid layer 2 is not smaller than that of the cover body 1. The connecting layer 3 is arranged on the bottom wall of the cover body 1, the connecting layer 3 is made of aluminum, the connecting layer 3 is used for being connected with a shell of the power battery, and the cover body 1, the rigid layer 2 and the connecting layer 3 are integrally formed.

It can be understood that, because aluminium has better ductility, make the lid 1 that is prepared by aluminium appear the deformation phenomenon easily in the in-service use process, behind power battery internally mounted monomer electricity core or module group, power battery makes lid 1 appear warping easily at the pressure that the operation in-process produced, and then leads to potential safety hazards such as battery inefficacy. Establish rigidity layer 2 on 1 roof of lid and have better rigidity and be difficult to appear deformation, even lid 1 produces the deformation trend under the inside pressure effect of power battery, rigidity layer 2 with 1 integrated into one piece of lid can play limiting displacement to the deformation of lid 1, thereby make lid 1 keep the original state under the restriction of rigidity layer 2, make the apron subassembly still can keep the original state when power battery is inside to appear pressure, thereby ensure to set up monomer electricity core or module in power battery inside and after in groups, potential safety hazards such as battery failure that can not appear leading to by the inflation of lid 1, the life and the security performance of apron subassembly have been showing and have been improved. Simultaneously, rigidity layer 2 is prepared by the stainless steel and is formed can be comparatively convenient the rigidity effect of realization rigidity layer 2, can also reduce the manufacturing cost of power battery cover plate subassembly simultaneously.

In addition, in the present invention, there are various methods for integrally molding the cover body 1 and the rigid layer 2, for example, in some embodiments, the rigid layer 2 can be integrally molded on the cover body 1 by using a molding method such as injection molding, compression molding, hot pressing, or an integrally casting processing method, and in this embodiment, the method for forming the cover body 1 and the rigid layer 2 as an integrally molded piece may be any integrally molding method. In the present embodiment, a structure in which the cover body 1 and the rigid layer 2 are not detachable is emphasized, rather than a process in which the cover body 1 and the rigid layer 2 are integrally molded.

According to the shell subassembly of this embodiment, because the inflation phenomenon can effectively prevent to appear in lid 1 under the external action in rigidity layer 2, can effectively avoid the battery inefficacy and the battery safety problem that lead to because lid 1 bloated to the security and the life of shell subassembly have been improved.

In some embodiments, as shown in fig. 2 and 3, two protrusions 4 are provided on the bottom wall of the connecting layer 3, and through holes 5 are provided on the bottom walls of the protrusions 4, penetrating through the connecting layer 3, the cover 1 and the rigid layer 2, the through holes 5 being used for mounting the pole piece.

It can be understood that the contact area of the bottom wall of the pole column piece and the connecting layer 3 can be increased when the pole column piece is installed due to the arrangement of the protruding portions 4, and meanwhile, the pole column piece can be limited in installation, so that the stability and the sealing performance of the pole column piece during installation on the cover plate assembly can be improved.

In some embodiments, as shown in fig. 3, the through-hole 5 is formed with a step therein for supporting the pole piece.

It can be understood that the step can be convenient for play the location effect to the installation of post, provides installation space for the installation of other structures such as sealing washer simultaneously to reduce the space use of post on the roof of rigid layer 2, make the partial volume that structures such as post outstanding rigid layer 2's roof less, improve power battery's pleasing to the eye degree.

In some embodiments, as shown in fig. 2 and 3, the power battery cover plate assembly further includes a mounting protrusion 6, the mounting protrusion 6 is disposed on the top wall of the rigid layer 2, the mounting protrusion 6 is plural, and each mounting protrusion 6 is disposed around one through hole 5.

It will be appreciated that the provision of the mounting projections 6 can facilitate the fixing of the post member to the rigid layer 2 to improve the stability of the mounting of the post member in the cover plate assembly.

In some embodiments, as shown in fig. 2, the at least one mounting boss 6 comprises a plurality of bosses evenly distributed around the central axis of the through-hole 5.

It can be understood that the setting of a plurality of bellyings can cooperate with utmost point post to be convenient for the utmost point post piece accuracy and install in through-hole 5, the bellyings can also play limiting displacement simultaneously, prevent that utmost point post piece from rotating on rigid layer 2, both improved the installation convenience of apron subassembly, also improved the security when apron subassembly uses.

In some embodiments, as shown in fig. 2 and 3, the power cell cover plate assembly further includes a counterbore 7, the counterbore 7 being provided on the top wall of the rigid layer 2 and extending through the cover body 1, the rigid layer 2 and the connecting layer 3.

It can be understood that counter sink 7 can regard as to annotate the liquid hole to use, because annotate the liquid hole and set up to counter sink 7, can prevent that electrolyte from flowing to the surface of rigid layer 2 when pouring into power battery inside to guaranteed the cleanliness factor on rigid layer 2 surface, in addition, counter sink 7's setting also can be convenient for annotate the sealed of liquid hole.

In some embodiments, as shown in fig. 3, the power battery cover plate assembly further comprises an extension protrusion 8, the extension protrusion 8 is provided on the bottom wall of the connection layer 3, and the extension protrusion 8 is provided around the counter sink 7.

It can be understood that the arrangement of the extension protrusion 8 can significantly reduce the possibility that the electrolyte is contaminated on the bottom wall of the connecting layer 3 when injected into the power battery, thereby improving the safety of the injected electrolyte, preventing the electrolyte from polluting the connecting layer 3 and prolonging the service life of the connecting layer 3.

In some embodiments, the cross-sectional area of the tie layer 3 gradually decreases in a direction away from the cover 1.

It can be understood that, because the cross sectional area of the connecting layer 3 is gradually reduced along the direction away from the cover body 1, and the cross sectional area of the cover plate assembly is matched with the cross sectional area of the power battery shell, the arrangement of the connecting layer 3 can not only reduce the stress concentration phenomenon, but also be convenient for accurately and quickly installing the cover plate assembly on the shell, thereby improving the installation efficiency of the cover plate assembly.

In some embodiments, the cover 1 and the rigid layer 2 are both rectangular in cross-section.

Example 1:

a power battery cover plate assembly according to an embodiment of the present invention will be described with reference to fig. 1 to 3.

The power battery cover plate assembly of the present embodiment includes a cover body 1, a rigid layer 2, a connection layer 3, a mounting boss 6, a counter sink 7, and an extension boss 8.

The lid body 1 is made of aluminum.

The rigid layer 2 is arranged on the top wall of the cover body 1, the rigid layer 2 is made of stainless steel, and the cross section area of the rigid layer 2 is not smaller than that of the cover body 1. The cover 1 and the rigid layer 2 are rectangular in cross section.

The connecting layer 3 is arranged on the bottom wall of the cover body 1, the connecting layer 3 is made of aluminum, the connecting layer 3 is used for being connected with a shell of the power battery, and the cover body 1, the rigid layer 2 and the connecting layer 3 are integrally formed. The cross-sectional area of the connecting layer 3 decreases gradually in a direction away from the cover 1. Be equipped with two bulges 4 on the diapire of articulamentum 3, be equipped with the through-hole 5 that runs through articulamentum 3, lid 1 and rigidity layer 2 on the diapire of bulge 4, through-hole 5 is used for installing the utmost point post spare. A step is formed in the through-hole 5 for supporting the pole piece.

The mounting protrusion 6 is arranged on the top wall of the rigid layer 2, the mounting protrusions 6 are multiple, and each mounting protrusion 6 is arranged around one through hole 5. The at least one mounting protrusion 6 comprises a plurality of protrusions which are evenly distributed around the central axis of the through hole 5.

The counter sink 7 is provided on the top wall of the rigid layer 2 and penetrates the lid 1, the rigid layer 2 and the connecting layer 3.

The extending protrusion 8 is arranged on the bottom wall of the connecting layer 3, and the extending protrusion 8 is arranged around the countersunk hole 7.

The specific structure of the power battery cover plate assembly according to the embodiment of the present invention will be described with reference to fig. 4 to 6.

As shown in fig. 4-6, fig. 4 discloses a power battery cover plate assembly comprising a cover 1 and a rigid layer 2. The lid body 1 is made of aluminum. The rigid layer 2 is arranged on the top wall of the cover body 1, the rigid layer 2 is made of stainless steel, and the cover body 1 and the rigid layer 2 are integrally formed.

According to the cover plate assembly of the embodiment, the rigid layer 2 can effectively prevent the cover body 1 from expanding under the external action, so that the problems of battery failure and battery safety caused by the bulge of the cover body 1 can be effectively avoided, and the safety and the service life of the cover plate assembly are improved.

In some embodiments, as shown in fig. 5 and 6, two protrusions 4 are provided on the bottom wall of the cover 1, and through holes 5 are provided on the bottom walls of the protrusions 4, which penetrate through the cover 1 and the rigid layer 2, and the through holes 5 are used for mounting the pole pieces.

It can be understood that the setting of bulge 4 can improve the area of contact of the diapire of utmost point post and lid 1 when the installation utmost point post of being convenient for, can play spacing effect to the installation of utmost point post simultaneously to be favorable to improving steadiness and the leakproofness of utmost point post when installing on the apron subassembly.

In some embodiments, as shown in fig. 4, the through-hole 5 is formed with a step therein for supporting the pole piece.

In some embodiments, as shown in fig. 5 and 6, the power battery cover plate assembly further includes a mounting protrusion 6, the mounting protrusion 6 is disposed on the top wall of the rigid layer 2, the mounting protrusion 6 is plural, and each mounting protrusion 6 is disposed around one through hole 5.

In some embodiments, as shown in fig. 5, the at least one mounting boss 6 comprises a plurality of bosses evenly distributed around the central axis of the through-hole 5.

In some embodiments, as shown in fig. 5 and 6, the power cell cover plate assembly further comprises a counterbore 7, the counterbore 7 being provided on the top wall of the rigid layer 2 and extending through the cover 1 and the rigid layer 2.

In some embodiments, as shown in fig. 6, the power battery cover plate assembly further comprises an extension protrusion 8, the extension protrusion 8 is provided on the bottom wall of the cover body 1, and the extension protrusion 8 is provided around the counter sink 7.

It can be understood that the arrangement of the extending protrusion 8 can significantly reduce the possibility that the electrolyte is contaminated on the bottom wall of the casing 1 when being injected into the power battery, thereby improving the safety of the injected electrolyte, preventing the electrolyte from polluting the casing 1, and prolonging the service life of the casing 1.

Example 2:

a power cell cover assembly according to an embodiment of the present invention is described below with reference to fig. 4-6.

The power battery cover plate assembly of the present embodiment includes a cover body 1, a rigid layer 2, a mounting boss 6, a counter-sunk hole 7 and an extension boss 8.

The lid body 1 is made of aluminum. Be equipped with two bulges 4 on the diapire of lid 1, be equipped with the through-hole 5 that runs through lid 1 and rigidity layer 2 on the diapire of bulge 4, through-hole 5 is used for installing the utmost point post spare. A step is formed in the through-hole 5 for supporting the pole piece.

A power cell comprising the power cell cover assembly described above.

According to the utility model discloses power battery, owing to have the preceding power battery apron subassembly, can prevent that power battery leads to the apron to appear the phenomenon of bulging at the charge-discharge in-process, improves power battery's security.

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

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A power battery cover plate assembly, comprising:

the cover body (1), the cover body (1) is made of aluminum;

rigid layer (2), establish rigid layer (2) on the roof of lid (1), rigid layer (2) are prepared by the stainless steel and form, lid (1) with rigid layer (2) are integrated into one piece.

2. The power battery cover plate assembly according to claim 1, characterized in that two bulges (4) are arranged on the bottom wall of the cover body (1), and through holes (5) penetrating through the cover body (1) and the rigid layer (2) are arranged on the bottom walls of the bulges (4), and the through holes (5) are used for installing pole pieces.

3. Power battery cover plate assembly according to claim 2, characterized in that a step is formed in the through hole (5) for supporting the pole piece.

4. The power battery cover plate assembly according to claim 2, further comprising a plurality of mounting protrusions (6), wherein the mounting protrusions (6) are provided on the top wall of the rigid layer (2), and each mounting protrusion (6) is provided around one of the through holes (5).

5. Power battery cover plate assembly according to claim 4, characterized in that at least one of the mounting protrusions (6) comprises a plurality of protrusions which are evenly distributed around the central axis of the through hole (5).

6. The power cell cover plate assembly according to claim 3, further comprising a counter bore (7), the counter bore (7) being provided on the top wall of the rigid layer (2) and extending through the cover (1) and the rigid layer (2).

7. The power battery cover plate assembly according to claim 6, further comprising an extension protrusion (8), wherein the extension protrusion (8) is arranged on the bottom wall of the cover body (1), and the extension protrusion (8) is arranged around the counter sink (7).

8. The power battery cover plate assembly according to claim 1, further comprising a connection layer (3), wherein the connection layer (3) is integrally formed on the bottom wall of the cover body (1), the connection layer (3) is made of aluminum, and the connection layer (3) is used for connecting with a housing of a power battery.

9. Power battery cover plate assembly according to claim 8, characterized in that the cross-sectional area of the connection layer (3) is decreasing in a direction away from the cover body (1).

10. A power cell comprising the power cell cover assembly of any of claims 1-9.