Honeycomb aluminum battery pack lower shell

Abstract

The utility model relates to the technical field of battery packs, in particular to a lower shell of a honeycomb aluminum battery pack, which comprises a lower shell main body made of honeycomb aluminum materials, air bags are respectively clamped on the inner walls of the lower shell main body, the central position of the bottom of the lower shell main body is hollow to form an empty bin, and a disc is arranged in the empty bin of the lower shell main body. A reset spring clamped with the disc is further arranged in the empty bin of the lower shell body, connecting frames are arranged on the outer ring of the disc at intervals, and limiting blocks are connected to the positions, close to the corners of the lower shell body, of the connecting frames. The central position of the lower shell of the honeycomb aluminum battery pack is hollow to form the empty bin, and the honeycomb aluminum is used for replacing a traditional material, so that the structural strength of the shell is greatly improved, the lightweight design of the lower shell is realized, the overall structural strength reaches the level of an iron shell, and the product plasticity is superior to that of the traditional material; and the material has the material properties of heat insulation, fire prevention, shock resistance and buffer resistance, and is very suitable for the lower shell of the battery pack.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely is a honeycomb aluminum battery pack lower shell. BACKGROUND

[0002] With the improvement of people's life quality, the popularity rate of vehicles is higher and higher, at the same time, with the improvement of environmental protection consciousness, hybrid electric vehicles and pure electric vehicles and other new energy vehicles have been greatly developed. In new energy vehicles, the performance of the on-board battery pack is particularly important, and the battery pack lower shell is an important component of the battery pack structure, which is mainly used for accommodating and supporting the internal battery module and providing physical protection. The battery pack lower shell needs to meet sufficient mechanical strength, such as after the vehicle collision, the battery pack shell needs to provide sufficient anti-collision protection for the battery pack to ensure the safety of the battery pack.

[0003] As disclosed in CN117613485A, a battery pack lower shell of a new energy vehicle is disclosed, which sets a fold line type support rib between the upper plate and the lower plate, which can meet the structural strength of the bottom plate, reduce the weight of the lower shell, and improve the endurance of the battery. In this scheme, the battery is placed on the upper plate, and then the battery is fixed by the horizontal and vertical clamping assemblies, which is convenient, time-saving and labor-saving.

[0004] However, the battery pack lower shell also has some disadvantages:

[0005] (1) Since the battery module needs to be installed into the lower shell, there will be a gap between the four sides of the lower shell and the battery module. When the vehicle shakes, for example: braking, uphill and downhill driving on uneven roads, the battery module will hit the inner wall of the lower shell due to inertia, which will cause damage to the battery module and reduce the service life of the battery.

[0006] (2) When installing the battery module and the liquid cooling plate, the battery module is directly pressed on the surface of the liquid cooling plate, which may cause damage to the liquid cooling plate. INVENTION CONTENTS

[0007] The utility model aims at providing a honeycomb aluminum battery pack lower shell to solve the problem of gap between the battery pack lower shell and the battery module on the market, which cannot effectively protect the battery module, and the battery module is directly pressed on the surface of the liquid cooling plate, which may cause damage to the liquid cooling plate.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: a honeycomb aluminum battery pack lower shell, including lower shell main part, the lower shell main part is honeycomb aluminum material, and the lower shell main part inner wall is respectively clamped with air bag, the lower shell main part bottom center position hollow forms the empty warehouse, and the empty warehouse in lower shell main part is equipped with disc, and the empty warehouse in lower shell main part is also equipped with the reset spring that is clamped with disc, the disc outer ring interval is equipped with connecting frame, and the position of connecting frame near lower shell main part corner is connected with limiting block, first limiting slot and second limiting slot are respectively set up on the limiting block, and the connecting slot is set up on the second limiting slot bottom of limiting block, and the inner wall of connecting slot is clamped with sliding block, the limiting block is longitudinally clamped with limiting column, and the air passage that is corresponding with limiting column is set up in limiting block, and the air passage is communicated with connecting slot.

[0009] Preferably, the lower shell main body inner side bottom is provided with a heat insulation pad, and the heat insulation pad is located between the connecting frames.

[0010] Preferably, the lower shell main body side wall is internally hollow to form an air chamber, and a piston and a top rod are slidingly inserted into the air chamber of the lower shell main body.

[0011] Preferably, the piston is transversely arranged, and a connecting spring adapted to the piston is movably clamped in the air chamber of the lower shell main body.

[0012] Preferably, the top rod is also transversely arranged, and the top rod is inserted and fixed with the air bag.

[0013] Preferably, the first limiting slot is located below the second limiting slot, and the height of the first limiting slot is equal to the thickness of the liquid cooling plate.

[0014] Preferably, the sliding block is of L-shaped structure, and two extrusion springs are longitudinally fixed in the connecting slot and fastened with the bottom of the sliding block.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The central position of the honeycomb aluminum battery pack lower shell is hollow to form an empty warehouse, and honeycomb aluminum is used instead of traditional materials, which greatly improves the strength of the shell structure and realizes lightweight design of the lower shell. The overall structural strength reaches the level of iron shell, and the product has better plasticity than traditional materials, and has the material properties of heat insulation, fireproof, shockproof and buffer resistance, which is very suitable for battery pack lower shell.

[0017] 2、The lower shell body of the honeycomb aluminum battery pack is provided with four sets of limiting blocks for positioning the liquid cooling plate, so that the battery module does not exert pressure on the liquid cooling plate, and after the battery module is installed, the extrusion spring is compressed by extruding the sliding block, so that air is injected into the limiting block, and the limiting column is pushed upward and the limiting of the limiting block is released, so that when the vehicle shakes, the battery module pushes the disc to slide in the empty cavity and extrudes the return spring, and the return spring exerts a counterforce on the disc, thereby offsetting part of the force exerted by the battery module on the disc, thereby playing a shock-absorbing role on the battery module.

[0018] 3、The lower shell body of the honeycomb aluminum battery pack is provided with four sets of limiting blocks for positioning the liquid cooling plate, so that the battery module does not exert pressure on the liquid cooling plate, and after the battery module is installed, the extrusion spring is compressed by extruding the sliding block, so that air is injected into the limiting block, and the limiting column is pushed upward and the limiting of the limiting block is released, so that when the vehicle shakes, the battery module pushes the disc to slide in the empty cavity and extrudes the return spring, and the return spring exerts a counterforce on the disc, thereby offsetting part of the force exerted by the battery module on the disc, thereby playing a shock-absorbing role on the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A honeycomb structure schematic view of the lower shell body of the honeycomb aluminum battery pack of the utility model;

[0020] Figure 2 A honeycomb structure schematic view of the lower shell body of the honeycomb aluminum battery pack of the utility model;

[0021] Figure 3 A connecting frame and disc connecting structure schematic view of the lower shell body of the honeycomb aluminum battery pack of the utility model;

[0022] Figure 4 A limiting block structure schematic view of the lower shell body of the honeycomb aluminum battery pack of the utility model;

[0023] Figure 5 A connecting structure schematic view of the main body and air bag of the lower shell body of the honeycomb aluminum battery pack of the utility model.

[0024] In the drawing: 1, lower shell body; 2, connecting frame; 3, heat insulation pad; 4, air bag; 5, limiting block; 6, disc; 7, return spring; 8, first limiting groove; 9, second limiting groove; 10, sliding block; 11, extrusion spring; 12, connecting groove; 13, limiting column; 14, air passage; 15, connecting spring; 16, piston; 17, top rod. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0026] See Figures 1-5The utility model provides a technical scheme: a honeycomb aluminum battery pack lower shell, including lower shell main body 1, lower shell main body 1 is honeycomb aluminum material, has realized the great promotion of shell structure strength, and has realized the lightweight design of lower shell main body 1, and the overall structural strength reaches the level of iron shell, and the inner wall of lower shell main body 1 is respectively clamped with air bag 4, and the bottom center position of lower shell main body 1 is hollow and forms the empty warehouse, and the empty warehouse of lower shell main body 1 is equipped with disc 6, makes disc 6 can slide in the empty warehouse of lower shell main body 1, and the empty warehouse of lower shell main body 1 still is equipped with the reset spring 7 of disc 6 clamping, can be reset to disc 6 through reset spring 7 and handle, disc 6 outer circle interval is equipped with connecting frame 2, and the bottom of lower shell main body 1 inboard is equipped with heat insulation pad 3, and heat insulation pad 3 is located between connecting frame 2, this structure makes heat insulation pad 3 be located at the bottom of liquid cooling plate, lets heat insulation pad 3 can be to lower shell main body 1 to bottom heat insulation protection's effect, and connecting frame 2 is close to the position of lower shell main body 1 corner and is connected with limiting block 5, make reliable connection between connecting frame 2 and limiting block 5, first limiting slot 8 and second limiting slot 9 are respectively set up on limiting block 5, and first limiting slot 8 is located below second limiting slot 9, and the height of first limiting slot 8 is equal to the thickness of liquid cooling plate, this structure provides the locating structure for liquid cooling plate through first limiting slot 8, and after battery module is fixed, through the positioning of battery module through second limiting slot 9, avoid the pressure that battery module exerts to liquid cooling plate, to realize the protection of liquid cooling plate, and the connecting groove 12 is set up on the bottom of second limiting slot 9 on limiting block 5, and the inner wall of connecting groove 12 is slidably clamped with slider 10, and slider 10 is L type structure, and two extrusion springs 11 that are clamped and fastened with the bottom of slider 10 are longitudinally fixed in connecting groove 12, this structure makes slider 10 can slide down after being subjected to longitudinal pressure, to make extrusion spring 11 compression, let battery module can be installed and positioned through the shock absorption of slider 10, prevent the surface of battery module from impacting the inner wall of lower shell main body 1 and cause damage, and let battery module can be smoothly clamped into second limiting slot 9, limiting column 13 is longitudinally clamped in limiting block 5, and the air passage 14 that corresponds with limiting column 13 is set up in limiting block 5, and air passage 14 is communicated with connecting groove 12, when installing battery module, battery module makes slider 10 slide down, and the pressure of slider 10 is reduced through extrusion spring 11, and the air in connecting groove 12 is pressed into air passage 14, to push limiting column 13 to move upward, when contacting the limiting of limiting block 5 by limiting column 13, make the vehicle when braking, uphill and uneven road driving, can push disc 6 to slide in the inside of the bottom middle empty warehouse of lower shell main body 1 and extrude reset spring 7 through connecting frame 2, and reset spring 7 will add a counterthrust to disc 6, to offset a part of the force that battery module exerts on disc 6, to play the shock absorption of battery module, and the air warehouse is hollow in the inside of lower shell main body 1 side wall,And the gas chamber of the lower shell body 1 is also slidingly connected with the piston 16 and the top rod 17, and the insertion parts of the piston 16 and the top rod 17 are communicated with each other, which makes the lower shell body 1 can be through the gas chamber and the cooperation of the air bag 4 to carry out the shock absorption protection treatment of the side wall, the piston 16 and the top rod 17 can be linked through gas compression, the piston 16 is transversely arranged, and the gas chamber of the lower shell body 1 is also movably connected with the connecting spring 15 matched with the piston 16, which makes the gas chamber of the lower shell body 1 communicate with the air bag 4, so that the air bag 4 is compressed to make the gas chamber compressed, so as to make the piston 16 active, the connecting spring 15 is compressed when the piston 16 moves, the top rod 17 is also transversely arranged, and the top rod 17 is inserted and fixed with the air bag 4, which can position the air bag 4 and the lower shell body 1 through the top rod 17, and when the battery module moves due to inertia and extrudes the air bag 4, the air bag 4 shrinks and injects the air in the inside into the inside of the gas chamber, so as to push the piston 16 to slide and extrude the connecting spring 15, and the air pressure caused by the movement of the piston 16 pushes the top rod 17 to slide outwards and applies a pushing force to the surface of the battery module, preventing the surface of the battery module from impacting the inner wall of the lower shell body 1 and causing damage, thereby playing a shock absorption protection role.

[0027] Working principle: when using the honeycomb aluminum battery pack lower shell, first put the four corners of the liquid cooling plate into the first limiting groove 8 on the surface of the four limiting blocks 5, and then put the battery module into the second limiting groove 9 as the liquid cooling plate, because the height of the first limiting groove 8 is the same as that of the liquid cooling plate, so as to avoid the pressure of the battery module on the liquid cooling plate, realize the protection of the liquid cooling plate, the heat insulation pad 3 is arranged at the bottom of the liquid cooling plate, which plays a role in heat insulation at the bottom of the lower shell body 1, after the installation of the battery module, the sliding block 10 is extruded, at this time, the sliding block 10 slides and compresses the compression spring 11, so as to inject the air in the connecting groove 12 into the limiting block 5 through the air vent groove 14, and then push the limiting column 13 to slide upwards and release the limiting of the limiting block 5, when the vehicle shakes, for example: brake, uphill and downhill and driving on uneven road, the battery module moves due to inertia, the connecting frame 2 pushes the disc 6 to slide in the empty chamber of the lower shell body 1 and extrudes the return spring 7, at the same time, the return spring 7 applies a counterforce to the disc 6, so as to offset part of the force applied by the battery module on the disc 6, realizing the shock absorption of the battery module, at the same time, when the battery module moves due to inertia, it extrudes the air bag 4, so that the air bag 4 shrinks and injects the air in the inside into the inside of the gas chamber, and pushes the piston 16 to slide and extrudes the connecting spring 15, so that the piston 16 pushes the top rod 17 to slide outwards and applies a pushing force to the surface of the battery module, preventing the surface of the battery module from impacting the inner wall of the lower shell body 1 and causing damage, thereby completing a series of work.

[0028] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lower cell pack case of honeycomb aluminum, comprising a lower case body (1), characterized in that: The lower shell body (1) is a honeycomb aluminum material, and the lower shell body (1) is provided with an air bag (4) in the inner wall, the bottom center of the lower shell body (1) is hollow to form an empty warehouse, and the empty warehouse of the lower shell body (1) is provided with a disc (6), and the empty warehouse of the lower shell body (1) is also provided with a reset spring (7) clamped with the disc (6), the outer circle of the disc (6) is provided with a connecting frame (2), and the connecting frame (2) is connected with a limiting block (5) near the corner of the lower shell body (1), the limiting block (5) is provided with a first limiting groove (8) and a second limiting groove (9), and the limiting block (5) is provided with a connecting groove (12) at the bottom of the second limiting groove (9), and the connecting groove (12) is provided with a sliding block (10) on the inner wall, the limiting block (5) is provided with a limiting column (13) in the longitudinal direction, and the limiting block (5) is provided with a ventilation groove (14) corresponding to the limiting column (13), and the ventilation groove (14) is communicated with the connecting groove (12).

2. A cellular aluminum battery pack lower case as set forth in claim 1, wherein: The inner bottom of the lower shell body (1) is provided with a heat insulation pad (3), and the heat insulation pad (3) is located between the connecting frames (2).

3. A cellular aluminum battery pack lower case as set forth in claim 1, wherein: The inner wall of the lower shell body (1) is hollow to form an air warehouse, and the air warehouse of the lower shell body (1) is also provided with a piston (16) and a top rod (17) slidingly inserted, and the insertion parts of the piston (16) and the top rod (17) are communicated with each other.

4. A cellular aluminum battery pack lower case as set forth in claim 3, wherein: The piston (16) is transversely arranged, and the air warehouse of the lower shell body (1) is also movably clamped with a connecting spring (15) matched with the piston (16).

5. A cellular aluminum battery pack lower case as set forth in claim 3, wherein: The top rod (17) is also transversely arranged, and the top rod (17) is inserted and fixed with the air bag (4).

6. A cellular aluminum battery pack lower case as defined in claim 1 wherein: The first limiting groove (8) is located below the second limiting groove (9), and the height of the first limiting groove (8) is equal to the thickness of the liquid cooling plate.

7. The lower cell pack housing of claim 1, wherein: The sliding block (10) is an L-shaped structure, and two extrusion springs (11) are fixed in the connecting groove (12) and clamped and fastened with the bottom of the sliding block (10).

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