阅读说明：本技术 一种钢铝混合电池箱 (Steel-aluminum hybrid battery box ) 是由 杨坤 熊栋 宋金庄 陈凯 阮承峰 于 2021-08-20 设计创作，主要内容包括：本发明属于电池盒产品技术领域,提供了一种钢铝混合电池箱,由上至下依次包括框架分总成、铝合金冲压板、铝合金冲压水冷板、冲压防护底板、安装支架以及多个热融自攻螺丝,框架总成由多块铝合金挤出成型并通过MIG焊接连接组成一个整体,铝合金冲压板与铝合金冲压水冷板通过钎焊连接成水冷板分总成,冲压防护底板和安装支架分通过电阻焊连接成底板分总成,框架分总成、水冷板分总成、底板分总成通过热融自攻螺丝连接成箱体总成。本发明的优点在于钢铝材料的混合使用,保护特征为底板使用碳钢材料,框架使用铝合金材料,使用FDS冷热融自攻螺丝连接成总成,水冷板与冲压防护底板有安全间隙,重量轻,可大幅降低成本。(The invention belongs to the technical field of battery box products, and provides a steel-aluminum hybrid battery box which sequentially comprises a frame sub-assembly, an aluminum alloy stamping plate, an aluminum alloy stamping water-cooling plate, a stamping protective bottom plate, a mounting bracket and a plurality of hot-melting self-tapping screws from top to bottom. The invention has the advantages that the steel and aluminum materials are mixed for use, and the protection characteristic is that the bottom plate is made of carbon steel materials, the frame is made of aluminum alloy materials, and FDS cold and hot melting self-tapping screws are used for connecting the bottom plate and the frame into an assembly, so that a safety gap is formed between the water cooling plate and the stamping protection bottom plate, the weight is light, and the cost can be greatly reduced.)

1. The utility model provides a steel-aluminum hybrid battery case, its characterized in that includes frame subassembly, aluminum alloy punching press board, aluminum alloy punching press water-cooling board, punching press protection bottom plate, installing support and a plurality of hot self tapping screw from top to bottom in proper order, the frame assembly constitute a whole by polylith aluminum alloy extrusion moulding and through MIG welded connection, aluminum alloy punching press board and aluminum alloy punching press water-cooling board be connected into water-cooling board subassembly through brazing, punching press protection bottom plate and installing support divide and connect into bottom plate subassembly through resistance welding, frame subassembly, water-cooling board subassembly, bottom plate subassembly connect into the box assembly through hot self tapping screw.

2. The steel-aluminum hybrid battery box according to claim 1, wherein the frame subassembly, the aluminum alloy stamping plate and the aluminum alloy stamping water cooling plate are made of aluminum alloy materials, and the stamping protective bottom plate and the mounting bracket are made of carbon steel materials through stamping forming.

3. The steel-aluminum hybrid battery box according to claim 2, wherein the aluminum alloy punching water-cooling plate is provided with a water inlet and a water outlet, the water inlet and the water outlet are provided with adapters, and the water inlet and the water outlet of the water-cooling plate are screwed on the frame sub-assembly through the adapters.

4. A steel aluminium hybrid battery box according to claim 3, wherein the aluminium alloy stamping water-cooling plate is placed between the frame subassembly and the base plate subassembly and forms a 5mm safety gap with the stamping protection base plate.

5. A steel-aluminum hybrid battery case according to claim 1, 2 or 3, wherein the hot-melt self-tapping screw includes a front threaded region and a rear non-threaded region, the bottom plate subassembly has a through hole, the hot-melt self-tapping screw passes through the through hole and is tapped into the frame subassembly through the front threaded region, wherein the non-threaded region of the hot-melt self-tapping screw is located in the through hole, and the threaded region of the hot-melt self-tapping screw is threadedly engaged with the frame subassembly and the aluminum alloy stamped plate.

6. The steel-aluminum hybrid battery box according to claim 5, wherein a glue storage groove is arranged between the frame subassembly and the aluminum alloy stamping plate, and the glue storage groove is filled with a sealant.

7. The steel-aluminum hybrid battery box according to claim 6, wherein the via hole simultaneously punches the protective base plate and the mounting bracket, and the punched protective base plate is located between the aluminum alloy punching water-cooling plate and the mounting bracket.

Technical Field

The invention belongs to the technical field of battery box products, and relates to a steel-aluminum hybrid battery box.

Background

The new energy subsidy policy in China and international is a temporary policy, the cost of the next generation of electric vehicles is reduced by 7% -23% after the subsidy is withdrawn, the charging time is shortened to 10 minutes in 2025, people do not have mileage anxiety to the electric vehicles, the electric vehicles do not excessively pursue high endurance, accordingly, a host factory does not excessively pursue high energy density of a PACK system, and a battery box has a certain weight increasing space. Through the analysis of the standard, the concept design of the Benz battery box and the BMW battery box is the steel-aluminum mixed battery box and the all-steel battery box, and the hybrid battery box which takes the steel and the aluminum as main materials and takes other materials as auxiliary materials is one of the trends. The battery box is used as a part of a power battery PACK system, the structural characteristics of the battery box are independent in development similar to those of a vehicle body, and the material use condition of the vehicle body has a standard meaning for the design of the battery box. At present, 3 main technical routes of vehicle bodies exist, high-end vehicle bodies mostly adopt mixed materials, middle-end and low-end vehicle bodies mainly adopt carbon steel, and all-aluminum vehicle bodies are gradually abandoned due to safety, maintenance, cost and the like, and the current main solution schemes include 2, wherein the scheme 1 is an all-steel stamping scheme, although the cost is greatly reduced, the weight is increased sharply, the current requirement of the whole vehicle on energy density is often not met, and the scheme 2 is a structure for optimizing an aluminum extrusion scheme, so that the cost is reduced limitedly, and the problem is difficult to solve fundamentally.

Disclosure of Invention

The invention aims to solve the technical problem and provides a steel-aluminum hybrid battery box aiming at the current situation of the prior art, which combines the advantages of an all-steel battery box and an all-aluminum battery box, achieves the balance of strength, weight and cost and greatly reduces the cost.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a steel-aluminum hybrid battery case, its characterized in that includes frame subassembly, aluminum alloy punching press board, aluminum alloy punching press water-cooling board, punching press protection bottom plate, installing support and a plurality of hot self tapping screw from top to bottom in proper order, the frame assembly constitute a whole by polylith aluminum alloy extrusion moulding and through MIG welded connection, aluminum alloy punching press board and aluminum alloy punching press water-cooling board be connected into water-cooling board subassembly through brazing, punching press protection bottom plate and installing support divide and connect into bottom plate subassembly through resistance welding, frame subassembly, water-cooling board subassembly, bottom plate subassembly connect into the box assembly through hot self tapping screw.

In foretell steel aluminium hybrid battery case, frame subassembly, aluminum alloy punching press board, aluminum alloy punching press water-cooling board make for aluminum alloy material, punching press protection bottom plate and installing support make for carbon steel material stamping forming.

In the above steel-aluminum hybrid battery box, the aluminum alloy flushing water-cooling plate is provided with a water inlet and a water outlet, the water inlet and the water outlet are provided with adapters, and the water inlet and the water outlet of the water-cooling plate are in screwed connection with the frame sub-assembly through the adapters.

In the above steel-aluminum hybrid battery box, the aluminum alloy stamping water-cooling plate is arranged between the frame sub-assembly and the bottom plate sub-assembly and forms a 5mm safety gap with the stamping protection bottom plate.

At foretell steel aluminium hybrid battery case, hot melt self-tapping screw include anterior threaded zone and the unthreaded district at rear portion, bottom plate subassembly on have a via hole, in the frame subassembly is attacked through anterior threaded zone to hot melt self-tapping screw through the via hole, wherein, the unthreaded position of hot melt self-tapping screw is in the via hole, hot melt self-tapping screw's threaded zone and frame subassembly and aluminum alloy stamping plate thread engagement.

In the steel-aluminum hybrid battery box, a glue storage groove is formed between the frame sub-assembly and the aluminum alloy stamping plate, and sealant is filled in the glue storage groove.

In the steel-aluminum hybrid battery box, the through hole simultaneously punches the protective bottom plate and the mounting bracket, and the punching protective bottom plate is positioned between the aluminum alloy punching water-cooling plate and the mounting bracket.

Compared with the prior art, the invention has the advantages that the steel and aluminum materials are mixed for use, and the protection characteristic is that the bottom plate is made of carbon steel materials, the frame is made of aluminum alloy materials, and FDS cold and hot melting self-tapping screws are used for connecting the bottom plate and the frame into an assembly, the water cooling plate and the stamping protection bottom plate have a safety gap, the strength is high, the weight is light, the cost is balanced, and the cost can be greatly reduced.

Drawings

FIG. 1 is an exploded view of a steel-aluminum hybrid battery case;

fig. 2 is a schematic view of a connection structure of the steel-aluminum hybrid battery case.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting to the scope of the present invention.

In the figure, the frame sub-assembly 100; a water-cooled plate subassembly 200; an aluminum alloy stamped plate 201; an aluminum alloy stamping water cooling plate 202; a bottom plate sub-assembly 300; stamping the guard base plate 301; a mounting bracket 302; a hot-melt tapping screw 400; a threaded region 401; a non-threaded region 402; a via 500; a glue storage tank 600; a sealant 700; an adapter 800.

As shown in fig. 1, the steel-aluminum hybrid battery box sequentially includes, from top to bottom, a frame sub-assembly 100, an aluminum alloy stamping plate 201, an aluminum alloy stamping water-cooling plate 202, a stamping protection base plate 301, a mounting bracket 302, and a plurality of hot-melt self-tapping screws 400.

Specifically, the frame assembly is formed by extruding a plurality of aluminum alloys and is connected into a whole through MIG welding, the aluminum alloy stamping plate 201 and the aluminum alloy stamping water-cooling plate 202 are connected into the water-cooling plate sub-assembly 200 through brazing, the stamping protection base plate 301 and the mounting bracket 302 are connected into the base plate sub-assembly 300 through resistance welding, the frame sub-assembly 100, the water-cooling plate sub-assembly 200 and the base plate sub-assembly 300 are connected into a box body assembly through hot melting self-tapping screws 400, wherein the frame sub-assembly 100, the aluminum alloy stamping plate 201 and the aluminum alloy stamping water-cooling plate 202 are made of aluminum alloy materials, the stamping protection base plate 301 and the mounting bracket 302 are made of carbon steel through stamping forming, specifically, the frame sub-assembly 100 adopts 6061 aluminum alloy materials, the aluminum alloy stamping plate 201 and the aluminum alloy stamping water-cooling plate 202 adopt 3033 aluminum alloy materials, the stamping protection base plate 301 adopts Q235 carbon steel materials, and the stamping protection base plate 301 is subjected to surface anti-corrosion treatment through electrophoresis, the mounting bracket 302 is made of a high strength carbon steel material such as Q900.

In order to facilitate water inlet and water outlet during cooling, the aluminum alloy flushing water-cooling plate 202 is provided with a water inlet and a water outlet, the water inlet and the water outlet are provided with adapters 800, the water inlet and the water outlet of the water-cooling plate are screwed on the frame sub-assembly 100 through the adapters 800, the aluminum alloy flushing water-cooling plate 202 is arranged between the frame sub-assembly 100 and the bottom plate sub-assembly 300 and forms a 5mm safety gap with the stamping protection bottom plate 301, and thus the bottom ball impact test can be ensured to pass safely.

As shown in fig. 2, the hot-melt self-tapping screw 400 includes a front threaded region 401 and a rear non-threaded region 402, the backplane sub-assembly 300 has a through hole 500, the through hole 500 simultaneously punches the protection backplane 301 and the mounting bracket 302, the punching protection backplane 301 is located between the aluminum alloy punching water-cooling plate 202 and the mounting bracket 302, the hot-melt self-tapping screw 400 passes through the through hole 500 and taps into the frame sub-assembly 100 through the front threaded region 401, wherein the non-threaded region 402 of the hot-melt self-tapping screw 400 is located in the through hole 500, where it is necessary to reserve an FDS through hole 500 between the punching protection backplane 301 and the mounting bracket 302 during processing, wherein the diameter of the FDS through hole is 8mm, the aluminum alloy punching plate 201 and the frame sub-assembly 100 are not pre-bored, so as to ensure that the front threaded region 401 taps into the frame sub-assembly 100, two layers of aluminum alloy material can be threadedly engaged, so that the threaded region 401 of the hot-melt self-tapping screw 400 is threadedly engaged with the frame sub-assembly 100 and the aluminum alloy punching plate 201, thereby guarantee the firm nature of connection, be provided with between frame subassembly 100 and the aluminum alloy stamping plate 201 and store up gluey groove 600, store up gluey groove 600 and fill and have sealed glue 700, can guarantee the sealed and anticorrosive of battery box like this, can obtain the balance of intensity, weight, cost, but reduce cost by a wide margin.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the described embodiments may be made by those skilled in the art without departing from the scope and spirit of the invention as defined by the accompanying claims.