CN217009419U - Power battery upper casing and battery pack - Google Patents

Abstract

The utility model relates to a modularized upper power battery shell and a battery pack, which comprise a front shell and a rear shell, wherein the rear shell comprises a permanent magnet, a sealing ring, a battery management unit fixing support and a maintenance cover, the permanent magnet is embedded in the rear shell, the front shell and the rear shell can be connected under the magnetic force of the permanent magnet after being lapped, the sealing ring is arranged in the rear shell in advance, when the front shell and the rear shell are tightly connected under the action of the permanent magnet, the sealing ring is arranged between the front shell and the rear shell, the front shell comprises a main body and a wire harness fixing plate fixed with the main body, the main body can be attracted by the permanent magnet, and the wire harness fixing plate is provided with a steel plate for riveting a stud. The utility model provides a modularized upper shell of a power battery, which not only is a load-bearing upper cover of the battery and meets the requirement of an integrated electric control system, but also can be used as a split upper cover and can meet the requirement of convenience in disassembly when a battery pack is maintained; the permanent magnets are used for realizing the connection of the front shell and the rear shell, and the waterproof sealing effect of the joint of the front shell and the rear shell is realized by combining the sealant.

Description

Power battery upper casing and battery pack

Technical Field

The utility model belongs to the technical field of power batteries, and particularly relates to an upper shell of a power battery and a battery pack.

Background

The power battery shell is used as a carrier of the whole power battery, so that the power battery shell not only plays a role of bearing a power battery structure, but also can protect the inside of the power battery. When designing the housing, not only the internal space should be considered, but also the stability of the housing should be increased without damaging the internal structure. Therefore, there is a need to develop a battery case having high strength and occupying a small space.

Because of the requirement of the integration of the whole vehicle, the integration of an electric control system and a battery of the vehicle is a development trend and limited by space, and the electric control system can only be integrated with a shell on the battery. Because the electronic control system is large and heavy, the battery upper shell needs to have high strength. At present, the scheme of the upper shell of the battery comprises an upper cover of a steel plate stamping process, an upper cover of a composite material and an upper cover of an aluminum plate stamping process. Wherein, steel sheet and aluminum plate upper cover improve intensity and just need thickening panel, and the weight of going up the casing will be overweight like this, and composite's last casing density is little, and thickening casing wall thickness weight increase is not a lot, but composite's last casing supports the bearing, and self intensity can hardly satisfy the requirement. Therefore, based on the current demand, the development of a high-strength and light-weight upper shell solution is needed.

The prior art discloses an upper cover structure of a power battery, which comprises an upper cover main body, wherein a side wall of the upper cover main body is connected with a flanging flange; the flanging flange comprises a first part connected with the side wall of the upper cover main body and a second part connected with the first part, and the first part and the second part are connected to form an L-shaped structure; the thickness of the first portion is less than the thickness of the second portion; the first portion is equipped with silica gel, silica gel with the second portion supports and leans on. However, the waterproof sealing effect at the joint of the front and rear housings is desired to be improved.

Meanwhile, because the frequency of the faults of the parts of the battery pack is different, the upper shell needs to be disassembled and assembled once as long as the parts have faults, so that the working strength is increased, if the parts with high fault frequency are intensively arranged in a specified area, the upper shell adopts a combined structure, so that the working strength can be reduced while the repair is ensured, and therefore, a combined modular battery upper cover needs to be designed.

Disclosure of Invention

The utility model aims to provide a modularized upper shell of a power battery and a battery pack, and solves the problem that the battery pack is convenient to disassemble when being maintained while the requirement of an integrated electric control system is met.

The purpose of the utility model is realized by the following technical scheme:

a power battery upper case includes a front case 100 and a rear case 200;

wherein the rear case 200 includes a permanent magnet 210, a sealing ring 220, a battery management unit fixing bracket 230, and a maintenance cover 240;

the permanent magnet 210 is pre-embedded in the rear shell 200, and the front shell and the rear shell can be connected under the magnetic force of the permanent magnet 210 after being lapped; the sealing ring 220 is pre-arranged in the rear shell 200, and when the front and rear shells are tightly connected under the action of the permanent magnet 210, the sealing ring 220 is arranged between the front and rear shells;

the front case 100 includes a main body 110 and a wire harness fixing plate 120 fixed with the main body 110, the main body 110 being capable of being attracted by a permanent magnet 210; the wire harness fixing plate 120 has a steel plate to which a stud is press-riveted.

Further, the rear case 200 is integrally formed by a cast aluminum molding process.

Further, the permanent magnet 210 is embedded at the lap joint of the rear housing 200.

Further, the rear case 200 has mounting grooves, the width of which is 2mm to 6mm, and the depth of which is 1mm to 6 mm.

Further, the packing 220 is installed in the installation groove.

Further, the sealing ring 220 is pre-drilled in the mounting groove of the rear housing 200 by means of gluing.

Further, the battery management unit fixing bracket 230 is used to fix the battery management unit.

Further, the main body 110 is a steel plate integrally formed in a press molding structure.

Further, the wire harness fixing plate 120 is connected to the body 110 by resistance welding or gluing.

A battery pack, comprising: the battery pack comprises the power battery upper shell.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides a modularized upper power battery shell which can be used as a load-bearing upper battery cover to meet the requirement of an integrated electric control system and can also be used as a split upper cover to meet the requirement of convenience in disassembly when a battery pack is maintained; the permanent magnets are used for realizing the connection of the front shell and the rear shell, and the waterproof sealing effect of the joint of the front shell and the rear shell is realized by combining the sealant.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a rear housing in an upper housing of a power cell;

FIG. 2 is a schematic structural diagram of an upper housing of the power cell;

FIG. 3 is a schematic structural view of a wire harness fixing plate;

FIG. 4 is a schematic view of the front housing and rear housing connection;

fig. 5 is a schematic structural view.

In the figure, 100, front housing 200, rear housing 200210, permanent magnet 220, gasket 230, battery management unit mounting bracket 240, service cover 110, main body 120, and harness mounting plate are shown.

Detailed Description

The utility model is further illustrated by the following examples:

the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not to be construed as limiting the utility model. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the upper case of the power battery of the present invention includes a front case 100 and a rear case 200.

The rear case 200 includes a permanent magnet 210, a sealing ring 220, a battery management unit fixing bracket 230, and a maintenance cover 240.

The rear housing 200 is integrally formed by cast aluminum, and has high strength and light weight. The permanent magnet 210 is pre-embedded in the rear housing 200, specifically, at the lap joint of the rear housing 200. The front and rear housings are connected by the magnetic force of the permanent magnet 210 after the front and rear housings are lapped.

The sealing ring 220 is pre-arranged in the rear shell 200, and when the front and rear shells are tightly connected under the action of the permanent magnet 210, the sealing ring 220 is arranged between the front and rear shells to ensure the sealing performance of the lap joint of the front and rear shells. When the front and rear housings are connected, the permanent magnet 210 acts to strongly attract the front housing and compress the sealing ring 220, thereby achieving the effect of sealing and waterproofing.

The rear case 200 has a mounting groove, the width of the mounting groove is preferably 2mm to 6mm, and the depth is 1mm to 6mm, the sealing ring 220 is mounted in the mounting groove, and the mounting groove can play a role in controlling the compression amount of the sealing ring 220 and fixing the sealing ring 220.

Specifically, the sealing ring 220 is pre-mounted in the sealing ring mounting groove of the rear housing 200 in a gluing manner, so that the sealing ring can be prevented from falling off from the sealing ring mounting groove.

The battery management unit fixing bracket 230 can realize the fixing function of the battery management unit.

The front case 100 includes a main body 110 and a wire harness fixing plate 120, and the main body 110 is a steel plate integrally formed structure and can be attracted by a permanent magnet 210. The wire harness fixing plate 120 is formed of a steel plate with a rivet stud, and the wire harness fixing plate 120 is connected to the body 110 by resistance welding or gluing.

A battery pack comprises the battery upper shell.

Example 1

A power battery upper case includes a front case 100 and a rear case 200. The rear case 200 includes a permanent magnet 210, a sealing ring 220, a battery management unit fixing bracket 230, and a service cover 240. The rear case 200 is integrally formed by cast aluminum. The permanent magnet 210 is pre-buried at the lap joint of the rear case 200. The front and rear housings are connected by the magnetic force of the permanent magnet 210 after the front and rear housings are lapped. The sealing ring 220 is pre-arranged in the rear shell 200, and when the front and rear shells are tightly connected under the action of the permanent magnet 210, the sealing ring 220 is arranged between the front and rear shells to ensure the sealing performance of the lap joint of the front and rear shells. The rear housing 200 has a mounting groove with a width of 2mm to 6mm and a depth of 1mm to 6mm, and the sealing ring 220 is mounted in the mounting groove by gluing. The battery management unit fixing bracket 230 can realize the fixing function of the battery management unit. The front case 100 includes a main body 110 and a wire harness fixing plate 120, and the main body 110 is a steel plate integrally formed structure and can be attracted by a permanent magnet 210. The wire harness fixing plate 120 is formed of a steel plate with a rivet stud, and the wire harness fixing plate 120 is connected to the body 110 by resistance welding or gluing.

A battery pack comprises the battery pack of the power battery upper shell.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A power battery upper casing, its characterized in that: comprises a front case (100) and a rear case (200);

wherein the rear case (200) includes a permanent magnet (210), a sealing ring (220), a battery management unit fixing bracket (230), and a maintenance cover (240); the permanent magnet (210) is pre-buried in the rear shell (200), and the front shell and the rear shell can be connected under the magnetic force of the permanent magnet (210) after being lapped; the sealing ring (220) is arranged in the rear shell (200) in advance, and when the front shell and the rear shell are tightly connected under the action of the permanent magnet (210), the sealing ring (220) is arranged between the front shell and the rear shell;

the front case (100) includes a main body (110) and a wire harness fixing plate (120) fixed to the main body (110), the main body (110) being attractable by a permanent magnet (210); the wire harness fixing plate (120) is provided with a steel plate for pressing and riveting the stud.

2. The upper shell of the power battery as claimed in claim 1, wherein: the rear shell (200) is integrally manufactured by adopting a cast aluminum forming process.

3. The upper shell of the power battery as claimed in claim 1, wherein: the permanent magnet (210) is pre-buried at the lap joint of the rear shell (200).

4. The upper shell of the power battery as claimed in claim 1, wherein: the rear shell (200) is provided with an installation groove, the width of the installation groove is 2mm-6mm, and the depth of the installation groove is 1mm-6 mm.

5. The upper shell of the power battery as claimed in claim 4, wherein: the sealing ring (220) is arranged in the mounting groove.

6. The upper shell of the power battery as claimed in claim 5, wherein: the sealing ring (220) is pre-arranged in an installation groove of the rear shell (200) in a gluing mode.

7. The upper shell of the power battery as claimed in claim 1, wherein: the battery management unit fixing bracket (230) is used for fixing a battery management unit.

8. The upper shell of the power battery as claimed in claim 1, wherein: the main body (110) is of an integrated stamping and forming structure of a steel plate.

9. The upper shell of the power battery as claimed in claim 1, wherein: the wire harness fixing plate (120) is connected with the main body (110) through resistance welding or gluing.

10. A battery pack, comprising: the battery pack comprises the power battery upper shell.

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