Battery pack and vehicle

Abstract

The battery pack comprises a box body, a cover plate, a supporting beam, a battery pack and a hoisting cylinder, the cover plate covers an opening of the box body, the two ends of the supporting beam are correspondingly and fixedly connected with the two opposite inner side walls of the box body, the battery pack is arranged in the box body, a through hole is formed in the hoisting cylinder in the axial direction, and the through hole is communicated with the box body. The hoisting cylinder comprises a first hoisting cylinder and a second hoisting cylinder, the two ends of the first hoisting cylinder are correspondingly connected to the two opposite sides of the cover plate and the supporting beam, the second hoisting cylinder is arranged in the supporting beam in a penetrating mode in the vertical direction, the lower end of the second hoisting cylinder is connected with a bottom plate of the box body, and the upper end of the second hoisting cylinder is detachably connected with the first hoisting cylinder; the minimum inner diameter of the through hole of the hoisting cylinder is zmm, the height of the second hoisting cylinder is a mm, the height of the first hoisting cylinder is b mm, and (a / b) * z is larger than or equal to 40 and smaller than or equal to 77.9. According to the utility model, the hoisting cylinder can be conveniently mounted, and the stability between the hoisting cylinder and the supporting beam is ensured, so that the mounting stability of the battery pack is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack and vehicle. BACKGROUND

[0002] The battery pack of electric automobile is usually fixed under the automobile chassis in the way of hoisting, in order to realize the hoisting of battery pack, usually set up hoisting cylinder on the battery pack, so that the fastener can be locked under the automobile chassis after penetrating the hoisting cylinder, and the installation of battery pack is completed.

[0003] In the conventional technology, the hoisting cylinder is mainly welded on the support beam in the battery pack in the way of welding, so that the hoisting cylinder is fixedly installed on the support beam, but the hoisting cylinder and the support beam are fixed by welding, which not only causes the deformation of the hoisting cylinder and the support beam, but also the installation method is more troublesome. UTILITY MODEL CONTENTS

[0004] The primary object of the utility model is to provide a battery pack to facilitate the installation of the hoisting cylinder and ensure the stability between the hoisting cylinder and the support beam.

[0005] Another object of the utility model is to provide a vehicle using the above-mentioned battery pack.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0007] A battery pack, comprising a box body, a cover plate, a support beam, a battery pack and a hoisting cylinder, the upper part of the box body is provided with an opening, the cover plate is arranged on the opening of the box body, the support beam is horizontally arranged in the box body, the two ends of the support beam are fixedly connected with the two opposite inner side walls of the box body, the battery pack is arranged in the box body, the inside of the hoisting cylinder is formed with a through hole in the axial direction, the hoisting cylinder comprises a first hoisting cylinder and a second hoisting cylinder arranged in sequence from top to bottom, the two ends of the first hoisting cylinder are correspondingly connected with the opposite sides of the cover plate and the support beam, the second hoisting cylinder is arranged in the support beam in the vertical direction, the lower end of the second hoisting cylinder is connected with the bottom plate of the box body, and the upper end of the second hoisting cylinder is detachably connected with the first hoisting cylinder.

[0008] The minimum inner diameter of the through hole of the hoisting cylinder is zmm, the height of the second hoisting cylinder is amm, and the height of the first hoisting cylinder is bmm, wherein 40≤(a / b)*z≤77.9.

[0009] The utility model also relates to a vehicle comprising the battery pack.

[0010] Compared with the prior art, the battery pack of the utility model embodiment has the following advantages:

[0011] In the utility model, the hoisting cylinder is installed on the battery pack in the mode of mechanical connection, welding is not needed, the hoisting cylinder and the support beam do not deform due to welding, and the stability of the battery pack is ensured, further, when the battery pack is installed on the chassis of the vehicle, fasteners are sequentially penetrated through the second hoisting cylinder and the first hoisting cylinder, the lower end of the fastener is supported on the lower end of the second hoisting cylinder, therefore, the second hoisting cylinder is the main force bearing component, the weight of the battery pack is mainly borne on the second hoisting cylinder, further, when a / b is larger, the height of the second hoisting cylinder is relatively larger than the first hoisting cylinder, the bearing capacity of the second hoisting cylinder is larger, therefore the inner diameter z of the through hole is reduced, and the hoisting strength of the battery pack can also be ensured, therefore, 40≤(a / b)*z≤77.9 is maintained, the height a of the second hoisting cylinder, the height b of the first hoisting cylinder and the inner diameter z of the through hole are comprehensively considered, so that the hoisting cylinder has suitable hoisting strength. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a top view of the battery pack of the utility model embodiment;

[0013] Figure 2 is Figure 1 is a sectional view of B-B in

[0014] Figure 3 is Figure 2 is an enlarged view of A in

[0015] Figure 4 is a size schematic view of the hoisting cylinder and the support beam of the utility model embodiment.

[0016] In the figure, 1, box body;11, bottom plate;2, cover plate;3, support beam;4, battery pack;5, hoisting cylinder;51, through hole;52, first hoisting cylinder;521, upper support part;522, lower support part;53, second hoisting cylinder;531, connecting part;532, limiting part;54, third hoisting cylinder;541, abutting part;55, lock nut;6, first sealing element;7, second sealing element. DETAILED DESCRIPTION

[0017] The specific embodiment of the utility model is further described in detail below in combination with the drawings and embodiments.The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0018] In the description of the utility model, it should be understood that the phrase "comprising" used in the utility model specification means that the features, integers, steps, operations, parts and / or components exist, but it does not exclude the existence or addition of one or more other features, integers, steps, operations, parts, components and / or their groups. It should be understood that when we say that a part is "connected" to another part, it can be directly connected to the other part, or there can be an intermediate part. The phrase "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0019] As Figures 1 to 4 The utility model relates to a kind of battery pack, including box 1, cover plate 2, support beam 3, battery group 4 and hoisting cylinder 5, the upper opening of the box 1 is set, the cover plate 2 is covered in the opening of the box 1, the support beam 3 is horizontally arranged in the box 1, the two ends of the support beam 3 are fixedly connected with the two opposite inner side walls of the box 1, the battery group 4 is arranged in the box 1, the inside of the hoisting cylinder 5 is formed with through hole 51 along the axial direction, the hoisting cylinder 5 includes first hoisting cylinder 52 and second hoisting cylinder 53 sequentially arranged from top to bottom, the two ends of the first hoisting cylinder 52 are correspondingly connected to the opposite sides of the cover plate 2 and the support beam 3, the second hoisting cylinder 53 is vertically arranged in the support beam 3, the lower end of the second hoisting cylinder 53 is connected with the bottom plate 11 of the box 1, and the upper end of the second hoisting cylinder 53 is detachably connected with the first hoisting cylinder 52.

[0020] The minimum inner diameter of the through hole 51 of the hoisting cylinder 5 is zmm, the height of the second hoisting cylinder 53 is a mm, and the height of the first hoisting cylinder 52 is b mm, wherein 40≤(a / b)*z≤77.9, 100mm≤a≤110mm, 27mm≤b≤40mm. Specifically, the value of a can be 101mm, 102mm, 103mm, 104mm, 105mm, 106mm, 107mm, 108mm or 109mm;The value of b can be 28mm, 29mm, 30mm, 32mm, 34mm, 35mm, 37mm, 38mm or 39mm;The value of (a / b)*z can be 41, 42, 45, 48, 50, 52, 54, 55, 58, 60, 62, 64, 66, 68, 70, 71, 73, 75, 76 or 77.

[0021] In the utility model, the hoisting cylinder 5 includes first hoisting cylinder 52 and second hoisting cylinder 53 set successively from top to bottom, both ends of the first hoisting cylinder 52 are connected to the opposite sides of the cover plate 2 and the support beam 3 respectively, the second hoisting cylinder 53 is arranged in the support beam 3 along the vertical direction, the lower end of the second hoisting cylinder 53 is connected with the bottom plate 11 of the box body 1, and the upper end of the second hoisting cylinder 53 is detachably connected with the first hoisting cylinder 52, so that the hoisting cylinder 5 is installed on the battery pack in a mechanical connection mode, welding is not needed, the hoisting cylinder 5 and the support beam 3 are not deformed due to welding, and the stability of the battery pack is ensured.

[0022] In the embodiment, the upper end of the second hoisting cylinder 53 is arranged to be out of the upper end surface of the support beam 3, the upper end of the second hoisting cylinder 53 is arranged to be in the first hoisting cylinder 52, and the upper end of the second hoisting cylinder 53 is threadedly connected with the first hoisting cylinder 52, so that the stability of the connection between the first hoisting cylinder 52 and the second hoisting cylinder 53 can be ensured, and the sealing of the first hoisting cylinder 52 and the second hoisting cylinder 53 can be ensured.

[0023] Specifically, the height of the support beam 3 in the vertical direction is hmm, and 0.2≤a / h≤0.6; the value of a / h can be 0.22, 0.24, 0.26, 0.28, 0.3, 0.32, 0.35, 0.38, 0.4, 0.42, 0.45, 0.48, 0.5, 0.52, 0.54, 0.56, 0.58 or 0.59.

[0024] Since the upper end of the second hoisting cylinder 53 is arranged to be out of the upper end surface of the support beam 3, if the size of the second hoisting cylinder 53 in the height direction of the battery pack is too small, the thread connection between the first hoisting cylinder 52 and the second hoisting cylinder 53 is not easy, and when the height of the support beam 3 is too high, the center of gravity is too high, which leads to the instability of the structure of the battery pack, therefore, 0.2≤a / h≤0.6 is maintained to facilitate the assembly of the hoisting cylinder 5 and ensure the stability of the battery pack.

[0025] In the embodiment, the hoisting cylinder 5 further comprises a third hoisting cylinder 54, an outer periphery of an upper end of the third hoisting cylinder 54 is provided with an abutting portion 541, and a lower end of the third hoisting cylinder 54 penetrates into an inner portion of the upper end of the first hoisting cylinder 52 and is threadedly connected with the first hoisting cylinder 52, so that when the third hoisting cylinder 54 is screwed, the abutting portion 541 abuts against a top surface of the cover plate 2.

[0026] That is, after the third hoisting cylinder 54 penetrates into the first hoisting cylinder 52 and is threadedly connected with the first hoisting cylinder 52, the abutting portion 541 of the third hoisting cylinder 54 abuts against an upper end surface of the cover plate 2, the first hoisting cylinder 52 abuts against a lower end surface of the cover plate 2, and the first hoisting cylinder 52 and the third hoisting cylinder 54 jointly clamp the cover plate 2, so that the hoisting cylinder 5 can be stably installed on the battery pack and the installation is faster.

[0027] In the embodiment, a lower end of the second hoisting cylinder 53 is provided with a connecting portion 531, the connecting portion 531 penetrates downward to below the box body 1, and a lock nut 55 is threadedly connected to an outer side of the connecting portion 531, and the lock nut 55 abuts against a bottom surface outside the box body 1.

[0028] That is, the lower end of the second hoisting cylinder 53 is fixed to the bottom plate 11 of the box body 1 by the lock nut 55, so that the second hoisting cylinder 53 is more stable, and the hoisting cylinder 5 can be stably installed on the battery pack and the installation is more convenient.

[0029] Preferably, an outer side of the second hoisting cylinder 53 and a region located in the box body 1 are provided with a limiting portion 532, and the limiting portion 532 is located between the support beam 3 and the bottom plate 11 of the box body 1.

[0030] Through the limiting portion 532, when the lock nut 55 is tightened, the lock nut 55 and the limiting portion 532 jointly clamp the bottom plate 11 of the box body 1, so that the position of the hoisting cylinder 5 is more stable, and meanwhile, the limiting portion 532 can support the support beam 3, which is conducive to making the hoisting force for hoisting the battery pack uniform and conducive to ensuring the stability of the position of the battery pack.

[0031] In the embodiment, a first sealing member 6 is arranged between the limiting portion 532 and the bottom plate 11 of the box body 1.

[0032] Since the hoisting cylinder 5 penetrates the bottom plate 11 of the box body 1 in the vertical direction, in order to ensure the sealing performance of the connection between the hoisting cylinder 5 and the box body 1 and prevent water from penetrating into the box body 1, the first sealing member 6 is arranged between the limiting portion 532 and the bottom plate 11 of the box body 1, and the first sealing member 6 is a sealing ring, so that when the limiting portion 532 abuts against the bottom plate 11 of the box body 1, the sealing ring is extruded, so as to ensure the sealing performance between the limiting portion 532 and the box body 1.

[0033] In the embodiment, the outer side of the upper end of the first lifting cylinder 52 extends outwardly with an upper support part 521, and the outer side of the lower end of the first lifting cylinder 52 extends outwardly with a lower support part 522, and the upper support part 521 and the lower support part 522 correspondingly abut against the opposite sides of the cover plate 2 and the support beam 3.

[0034] That is, the upper end and the lower end of the first lifting cylinder 52 correspondingly abut against the opposite sides of the cover plate 2 and the support beam 3 to play a supporting role between the cover plate 2 and the support beam 3, and due to the arrangement of the upper support part 521 and the lower support part 522, the contact area of the first lifting cylinder 52 with the cover plate 2 and the support beam 3 is increased, so that the support is more stable, and the stability after the battery pack is installed can be ensured.

[0035] Preferably, a second sealing member 7 is arranged between the upper support part 521 of the first lifting cylinder 52 and the cover plate 2.

[0036] Since the lifting cylinder 5 penetrates the cover plate 2 in the vertical direction, in order to ensure the sealing performance of the connection between the lifting cylinder 5 and the cover plate 2 and prevent water from seeping into the box body 1, a second sealing member 7 is arranged between the upper support part 521 and the cover plate 2, and the second sealing member 7 is a sealing ring, so that when the upper support part 521 abuts against the cover plate 2, the sealing ring is extruded to ensure the sealing performance between the upper support part 521 and the cover plate 2.

[0037] It should be noted that the smallest inner diameter of the first lifting cylinder 52, the second lifting cylinder 53 and the third lifting cylinder 54 is the smallest inner diameter z of the through hole 51 of the lifting cylinder 5, and the smallest inner diameter of the lifting cylinder 5 is used to determine the maximum size of the fastener, and the size of the fastener can determine the lifting strength.

[0038] The utility model also relates to a vehicle comprising the battery pack.

[0039] The structure of the battery pack is more stable, and the assembly is simpler, and the vehicle adopts the battery pack, so that the battery pack can be stably installed on the vehicle, thereby ensuring the normal use of the vehicle.

[0040] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary technical personnel in the technical field, without departing from the technical principle of the utility model, a number of improvements and replacements can be made, and these improvements and replacements should be regarded as the protection range of the utility model.

Claims

1. A battery pack, characterized in that, The device includes a housing, a cover plate, a support beam, a battery pack, and a lifting cylinder. The housing has an opening at the top, and the cover plate covers the opening. The support beam is horizontally positioned inside the housing, with its two ends fixedly connected to the two opposite inner sidewalls of the housing. The battery pack is located inside the housing. The lifting cylinder has an axially formed through hole inside. The lifting cylinder includes a first lifting cylinder and a second lifting cylinder arranged sequentially from top to bottom. The two ends of the first lifting cylinder are connected to the opposite sides of the cover plate and the support beam. The second lifting cylinder passes vertically through the support beam. The lower end of the second lifting cylinder is connected to the bottom plate of the housing, and the upper end of the second lifting cylinder is detachably connected to the first lifting cylinder. The minimum inner diameter of the through hole of the lifting cylinder is z mm, the height of the second lifting cylinder is a mm, and the height of the first lifting cylinder is b mm, wherein 40 ≤ (a / b)*z ≤ 77.

9.

2. The battery pack according to claim 1, characterized in that, The upper end of the second lifting cylinder extends upward to the top of the support beam, and the upper end of the second lifting cylinder enters the first lifting cylinder and is threadedly connected to the first lifting cylinder.

3. The battery pack according to claim 2, characterized in that, The height of the support beam is h mm, where 0.2 ≤ a / h ≤ 0.

6.

4. The battery pack according to claim 1, characterized in that, The lifting cylinder also includes a third lifting cylinder. The outer periphery of the upper end of the third lifting cylinder is provided with an abutment portion. The lower end of the third lifting cylinder passes through the interior of the upper end of the first lifting cylinder and is threadedly connected to the first lifting cylinder so that when the third lifting cylinder is tightened, the abutment portion abuts against the top surface of the cover plate.

5. The battery pack according to claim 1, characterized in that, The lower end of the second lifting cylinder is provided with a connecting part, which extends downward to the bottom of the box body. A locking nut is threaded on the outer side of the connecting part, and the locking nut is pressed against the bottom surface of the box body.

6. The battery pack according to claim 5, characterized in that, A limiting part is provided on the outer side of the second lifting cylinder and in the area inside the box, and the limiting part is located between the support beam and the bottom plate of the box.

7. The battery pack according to claim 6, characterized in that, A first sealing element is provided between the limiting part and the bottom plate of the box.

8. The battery pack according to claim 1, characterized in that, An upper support portion extends outward from the outer side of the upper end of the first lifting cylinder, and a lower support portion extends outward from the outer side of the lower end of the first lifting cylinder. The upper support portion and the lower support portion abut against the opposite sides of the cover plate and the support beam, respectively.

9. The battery pack according to claim 7, characterized in that, A second sealing element is provided between the upper support part of the first lifting cylinder and the cover plate.

10. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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