CN217691357U

CN217691357U - Multi-material composite battery pack bottom plate structure

Info

Publication number: CN217691357U
Application number: CN202221234986.5U
Authority: CN
Inventors: 曹晓燕; 卞学鹏
Original assignee: Nanjing Aochuang Advanced Material Technology Co ltd
Current assignee: Nanjing Aochuang Advanced Material Technology Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-10-28
Anticipated expiration: 2032-05-20

Abstract

The utility model provides a compound battery package bottom plate structure of many materials, a serial communication port, including the thermal-insulated main part of bottom plate, switching structure sets up the outer lane position in the thermal-insulated main part of bottom plate, switching structure and the outer lane fixed connection of the thermal-insulated main part of bottom plate. The bottom plate structure has better heat insulation effect.

Description

Multi-material composite battery pack bottom plate structure

Technical Field

The utility model relates to a battery package bottom plate structure, concretely relates to compound battery package bottom plate structure of many materials.

Background

At present, in the new energy automobile battery industry, the mainstream material in the industry is still steel or aluminum alloy, and the manufacturing method mainly comprises stamping and welding. The scheme is widely applied due to the stable and mature process route and the thick and durable structure.

Meanwhile, with the rise of composite materials, the composite materials are applied to new energy battery base plates, so that base plates with more advantages are obtained, and the development direction of companies and host factories is changed.

With the further research, the defect of poor heat insulation effect of the traditional battery pack bottom plate is more and more obvious. A multi-material composite battery pack bottom plate structure is designed to improve the condition of poor heat insulation of a traditional battery pack bottom plate.

Disclosure of Invention

For overcoming the not enough of prior art, the utility model provides a compound battery package bottom plate structure of many materials, its thermal-insulated effect is better.

In order to achieve the above object, the utility model discloses a compound battery package bottom plate structure of many materials, including the thermal-insulated main part of bottom plate, switching structure encloses the outer lane position of establishing in the thermal-insulated main part of bottom plate, switching structure and the outer lane fixed connection of the thermal-insulated main part of bottom plate.

Furthermore, the bottom plate heat insulation main body comprises an upper bottom plate, a lower bottom plate and a heat insulation sandwich layer, the upper bottom plate and the lower bottom plate are respectively located above and below the heat insulation sandwich layer, the upper bottom plate, the lower bottom plate and the heat insulation sandwich layer are rectangular, the switching structure is arranged around the heat insulation sandwich layer in a surrounding mode, one part of the switching structure is located between the upper bottom plate and the lower bottom plate, the lower surface of the upper panel and the upper surface of the lower panel are respectively bonded with the heat insulation sandwich layer and the switching structure, and the switching structure and the heat insulation sandwich layer are sealed mutually.

Furthermore, the upper surface and the lower surface of the switching structure are both concavely provided with grooves, the grooves are positioned between the lower surface of the upper base plate and the upper surface of the switching structure, the grooves are positioned between the upper surface of the lower base plate and the lower surface of the switching structure, and the grooves extend along the length direction of the edge of the upper base plate.

Furthermore, the interior of the adapter structure is provided with a lightening groove, and the lightening groove extends along the length direction of the edge of the upper bottom plate.

Furthermore, the upper panel includes fire-retardant layer and first gluing layer, and fire-retardant layer is in the top on first gluing layer, and fire-retardant layer is in that first gluing layer bonds each other.

Further, lower panel includes that the second glues glutinous layer, supporting layer and inoxidizing coating, and the second glues glutinous layer, supporting layer and inoxidizing coating and from last to setting gradually down, and the second glues glutinous layer, supporting layer and inoxidizing coating and bonds each other.

Further, the vertical cross-sectional shape of the groove is saw-toothed.

Has the beneficial effects that: the bottom plate is divided into an upper bottom plate, a lower bottom plate, a heat insulation sandwich layer and a switching structure, the heat insulation sandwich layer plays a heat insulation effect, the heat insulation sandwich layer is positioned between the upper bottom plate and the lower bottom plate, and the four parts are mutually independent, so that the heat insulation sandwich layer is convenient to place between the upper bottom plate and the lower bottom plate, and the assembly is easy.

Drawings

The invention will be further described and illustrated with reference to the accompanying drawings.

Fig. 1 is an overall schematic structural view of the preferred embodiment of the present invention.

Fig. 2 isbase:Sub>A cross-sectional view atbase:Sub>A-base:Sub>A in fig. 1.

Fig. 3 is a sectional view of the upper plate.

Fig. 4 is a sectional view of the lower plate.

Reference numerals: 1. an upper base plate; 2. a lower base plate; 3. a thermally insulating sandwich layer; 4. a switching structure; 5. a groove; 6. a flame retardant layer; 7. a first adhesive layer; 8. a second adhesive layer; 9. a support layer; 10. a protective layer; 11. and a weight reduction groove.

Detailed Description

The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, the multi-material composite battery pack bottom plate structure of the preferred embodiment of the present invention comprises an upper bottom plate 1, a lower bottom plate 2, a heat insulation sandwich layer 3, and a switching structure 4, wherein the upper bottom plate 1 and the lower bottom plate 2 are respectively located above and below the heat insulation sandwich layer 3, the switching structure 4 is enclosed in the outer ring of the heat insulation sandwich layer 3, and the upper bottom plate 1, the lower bottom plate 2, and the heat insulation sandwich layer 3 are all rectangular, so that the switching structure 4 is enclosed in the peripheral positions of the outer ring of the upper bottom plate 1, the lower bottom plate 2, and the heat insulation sandwich layer 3; alternatively, the adapting structures 4 are arranged on two opposite surfaces of the outer rings of the upper bottom plate 1, the lower bottom plate 2 and the heat insulation sandwich layer 3.

Mutual fixation between the outer wall surface of the switching structure 4 and the heat insulation sandwich layer 3, the fixed mode comprises mechanical connection and glue connection, wherein the mechanical connection comprises bolts or rivet connection, the mechanical connection needs to ensure the sealing property between the switching structure 4 and the heat insulation sandwich layer 3, the sealing mode comprises but is not limited to the use of sealing rivets with sealing rings, the rivets and the gaps between the switching structure 4 and the heat insulation sandwich layer 3 are filled through sealing glue, and the glue connection comprises structural glue.

In the embodiment, the adapting structure 4 is enclosed around the outer rings of the upper base plate 1, the lower base plate 2 and the heat insulating sandwich layer 3.

The vertical section of the adapter structure 4 is in a shape of a 'convex' in an inclined manner. The top portion of the adapter structure 4 is located between the upper plate 1 and the lower plate 2, and the bottom portion of the adapter structure 4 is not located between the upper plate 1 and the lower plate 2.

Moreover, the upper surface and the lower surface of the bottom of the adapting structure 4 are designed with two conditions, the first condition is: the upper surface and the lower surface of the bottom part of the adapter structure 4 are respectively leveled to the upper surface and the lower surface of the upper base plate 1 and the lower base plate 2; the second case is: the upper surface and the lower surface of the bottom part of the adapter structure 4 respectively protrude from the upper surface and the lower surface of the upper base plate 1 and the lower base plate 2. The present embodiment is illustrated by the first case of the adapting structure 4.

The lower surface of the upper base plate 1 and the upper surface of the lower base plate 2 are respectively bonded with the upper surface and the lower surface of the heat insulation sandwich layer 3 through structural adhesives. The upper surface of the top part of the 'convex' shape switching structure 4 placed in an inclined mode is bonded with the lower surface of the upper base plate 1 through structural adhesive, and the lower surface of the switching structure 4 is bonded with the upper surface of the lower base plate 2 through structural adhesive.

The pouring-placed convex switching structure 4 and the heat insulation sandwich layer 3 are encapsulated by structural adhesive, and the switching structure 4 and the heat insulation sandwich layer 3 are in a sealed state.

The upper surface and the lower surface of the top part of the 'convex' adapter structure 4 placed in a toppling mode are both concavely provided with grooves 5, the grooves 5 are located between the lower surface of the upper base plate 1 and the upper surface of the adapter structure 4, and the grooves 5 are located between the upper surface of the lower base plate 2 and the lower surface of the adapter structure 4.

The groove 5 extends along the length direction of the edge of the upper bottom plate 1, and has 4 sections in total, and is also arranged around the heat insulation sandwich layer 3.

The vertical cross section of the groove 5 is preferably in a sawtooth shape, and due to the existence of the groove 5, after the groove 5 is filled with the structural adhesive, the thickness of the structural adhesive between the upper base plate 1 and the adapter structure 4 is increased, and the sealing property and the connection strength of the upper base plate and the adapter structure are improved. Similarly, the other side of the adapter structure 4 also improves the sealing performance and the connection strength between the adapter structure 4 and the lower plate 2 after the structural adhesive fills the groove 5.

The inside of the adapter structure 4 is provided with a lightening slot 11, the shape of the lightening slot 11 is not particularly required, and the lightening slot 11 extends along the length direction of the edge of the upper base plate 1. The lightening grooves 11 are used for reducing the weight of the whole bottom plate and lightening the whole bottom plate.

In this embodiment, the upper plate 1 is divided into two layers, including fire-retardant layer 6 and the first layer 7 that glues glutinous, and fire-retardant layer 6 and the first layer 7 that glues glutinous sets gradually from last to down, and both connect through the mode that bonds.

The flame-retardant layer 6 is a layer structure which is made of materials such as epoxy glass fiber/unsaturated polyester glass fiber/PP-glass fiber and has a certain thickness. The first sticky layer 7 is a layer structure made of non-woven fabric material and having a certain thickness.

The lower bottom plate 2 is divided into three layers, and comprises a second adhesive layer 8, a supporting layer 9 and a protective layer 10, wherein the second adhesive layer 8, the supporting layer 9 and the protective layer 10 are sequentially arranged from top to bottom, and the three layers are connected in a bonding mode.

The second adhesive layer 8 is a layer structure made of non-woven fabric material and having a certain thickness.

The supporting layer 9 is a layer structure with a certain thickness made of unsaturated polyester glass fiber/PP-glass fiber and other materials.

The protective layer 10 is a layer structure made of silicone resin-glass fiber composite material/flame-retardant PVC and the like and having a certain thickness.

The heat insulation sandwich layer 3 is made of honeycomb products such as aluminum honeycomb, PP honeycomb and the like, or foam products such as PMI foam, PU foam, EPS foam and the like.

The adapter 4 is an aluminum alloy/steel. All the above materials are known materials. The whole manufactured bottom plate is connected with the outer frame of the lower box body of the battery pack through welding or mechanical connection.

To sum up, the utility model has the advantages that: 1. the thermal insulation effect is achieved by the material of the thermal insulating sandwich layer 3 by the composite material properties.

2. The bottom plate is divided into four parts, namely an upper bottom plate 1, a lower bottom plate 2, a heat insulation sandwich layer 3 and a switching structure 4, and the four parts are mutually independent, so that the heat insulation sandwich layer 3 is convenient to place between the upper bottom plate 1 and the lower bottom plate 2, and the assembly is easy.

The detailed description is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention. Without departing from the design concept and spirit scope of the present invention, the ordinary skilled in the art should belong to the protection scope of the present invention according to the present invention provides the text description and drawings to the various modifications, replacements and improvements made by the technical solution of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. The utility model provides a compound battery package bottom plate structure of many materials, its characterized in that includes the thermal-insulated main part of bottom plate, switching structure sets up the outer lane position at the thermal-insulated main part of bottom plate, switching structure and the outer lane fixed connection of the thermal-insulated main part of bottom plate.

2. The multi-material composite battery pack floor structure according to claim 1, wherein the floor heat insulation main body comprises an upper floor, a lower floor and a heat insulation sandwich layer, the upper floor and the lower floor are respectively located above and below the heat insulation sandwich layer, the upper floor, the lower floor and the heat insulation sandwich layer are rectangular, the switching structure is arranged around the heat insulation sandwich layer in a surrounding mode, one part of the switching structure is located between the upper floor and the lower floor, the lower surface of the upper floor and the upper surface of the lower floor are respectively bonded with the heat insulation sandwich layer and the switching structure, and the switching structure and the heat insulation sandwich layer are sealed with each other.

3. The multi-material composite battery pack bottom plate structure as claimed in claim 2, wherein the grooves are recessed on both the upper surface and the lower surface of the adapter structure, the grooves are located between the lower surface of the upper bottom plate and the upper surface of the adapter structure, and the grooves are located between the upper surface of the lower bottom plate and the lower surface of the adapter structure, and the grooves extend along the length direction of the edge of the upper bottom plate.

4. The multi-material composite battery pack bottom plate structure as claimed in claim 1, wherein the interior of the adapter structure is provided with weight-reducing slots, and the weight-reducing slots extend along the length direction of the edge of the upper bottom plate.

5. The multi-material composite battery pack bottom plate structure according to claim 2, wherein the upper bottom plate comprises a flame retardant layer and a first adhesive layer, the flame retardant layer is located above the first adhesive layer, and the flame retardant layer is located at the position where the first adhesive layer is adhered to each other.

6. The multi-material composite battery pack bottom plate structure according to claim 2, wherein the bottom plate comprises a second adhesive layer, a supporting layer and a protective layer, the second adhesive layer, the supporting layer and the protective layer are sequentially arranged from top to bottom, and the second adhesive layer, the supporting layer and the protective layer are adhered to each other.

7. The multi-material composite battery pack floor structure according to claim 3, wherein the vertical cross-sectional shape of the groove is saw-toothed.