Battery steel shell

Abstract

The utility model discloses a battery steel shell and relates to the technical field of battery protection. Comprising a shell, the shell comprises a frame body and an upper cover plate, an opening is formed in one end of the frame body, the upper cover plate is arranged at the opening, the periphery of the upper cover plate is connected with the frame body, the upper cover plate is flush with the opening end of the frame body, and a sealed cavity is defined by the upper cover plate and the frame body; the roll core is arranged in the sealing cavity, the shape of the roll core is matched with the shape of the frame body, a connecting piece is arranged on the frame body, and the roll core is connected with the connecting piece. According to the battery steel shell provided by the utility model, the upper cover plate is directly fixed at the opening of the frame body, so that the roll core can be positioned in the sealed cavity, the size of the upper cover plate is reduced, the battery structure is more compact, the influence on the battery performance due to the offset between the upper cover plate and the frame body is avoided, and the risk of liquid leakage is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery protection technical field, more specifically relates to a battery steel shell. BACKGROUND

[0002] At present, the battery steel shell is made of steel material, has greater hardness, can be applied to some possible collision equipment, therefore, has obtained greater attention, and the traditional steel shell generally includes electric core, encapsulates electric core steel lower shell body and connects the upper cover on the steel shell.

[0003] However, in the production process, the gap between the upper cover and the lower shell welding position cannot reach zero, and the gap between the upper cover and the lower shell is not connected. Figure 1 As shown in the drawings, the winding core is assembled into the lower shell 7 according to the requirement, the upper cover 6 and the lower shell 7 are welded and sealed, at this time, the slight gap between the upper cover 6 and the lower shell 7 is easy to be virtual welding, and there is a risk of liquid leakage.

[0004] Therefore, how to provide a battery steel shell without gap is a problem to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a battery steel shell, avoids the gap between the upper cover plate and the frame, ensures the welding quality of the shell, and reduces the risk of liquid leakage. In order to realize the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a battery steel shell, which comprises:

[0007] The shell comprises a frame and an upper cover plate, one end of the frame is provided with an opening, the upper cover plate is arranged at the opening, and the periphery of the upper cover plate is connected with the frame, the upper cover plate is flush with the opening end of the frame, and the upper cover plate and the frame form a sealed cavity.

[0008] The winding core is arranged in the sealed cavity, the shape of the winding core is adapted to the shape of the frame, the frame is provided with a connecting piece, and the winding core is connected with the connecting piece.

[0009] Further, the frame comprises a middle frame and a lower cover plate, the upper and lower ends of the middle frame are provided with openings, the upper and lower cover plates are connected with the openings at the upper and lower ends of the middle frame respectively, and the upper and lower ends of the middle frame are flush with the upper and lower ends of the middle frame.

[0010] Further, the connecting piece includes a positive connecting piece and a negative connecting piece, the positive connecting piece and the negative connecting piece are arranged on the middle frame, the winding core is provided with a positive pole lug and a negative pole lug, the positive pole lug of the winding core is connected with the positive connecting piece, and the negative pole lug of the winding core is connected with the negative connecting piece.

[0011] Further, the middle frame is provided with a liquid injection hole, and the liquid injection hole is connected with a liquid injection hole cover plate.

[0012] Further, the upper cover plate and the lower cover plate are fixed on the upper and lower ends of the middle frame through welding.

[0013] Compared with the prior art, the battery steel shell is connected at the opening of the frame body, the shape of the upper cover plate is adapted to the frame body, the volume of the battery steel shell is reduced, the battery structure is more compact, the gap between the upper cover plate and the frame body is avoided, the upper cover plate and the frame body form a sealed cavity, the winding core is arranged in the sealed cavity, and the risk of liquid leakage is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0015] Figure 1 It is a structural schematic view of the battery steel shell in the prior art.

[0016] Figure 2 It is a structural schematic view of the battery steel shell provided by the present application.

[0017] Figure 3 It is an exploded view of the battery steel shell provided by the present application.

[0018] In the figure: 1, upper cover plate; 2, winding core; 3, middle frame; 4, liquid injection hole cover plate; 5, lower cover plate; 6, upper cover; 7, lower shell. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] Referring to Figures 2-3 The utility model discloses a battery steel shell, comprising:

[0021] The shell comprises a frame and an upper cover plate 1, one end of the frame is provided with an opening, the upper cover plate 1 is arranged at the opening, and the periphery of the upper cover plate 1 is connected with the frame, the upper cover plate 1 is flush with the opening end of the frame, and the upper cover plate 1 and the frame enclose a sealed cavity.

[0022] The winding core 2 is arranged in the sealed cavity, the shape of the winding core 2 is adapted to the shape of the frame, the frame is provided with a connecting piece, and the winding core 2 is connected with the connecting piece.

[0023] During the assembly of the battery, the winding core 2 is installed in the frame, and the upper cover plate 1 is connected at the opening of the frame, so that the winding core 2 can be located in the sealed cavity, and the risk of liquid leakage is reduced.

[0024] The upper cover plate 1 is directly fixed at the opening, the volume of the upper cover plate 1 is reduced, the gap between the upper cover plate 1 and the frame is avoided, the battery performance is affected, the battery structure is more compact, and the battery structure is more compact.

[0025] In some embodiments, the frame comprises a middle frame 3 and a lower cover plate 5, the upper and lower ends of the middle frame 3 are provided with openings, the upper cover plate 1 and the lower cover plate 5 are connected at the openings of the upper and lower ends of the middle frame 3 respectively, and the ends, away from each other, of the upper cover plate 1 and the lower cover plate 5 are flush with the upper and lower ends of the middle frame 3.

[0026] Before the winding core 2 is installed, the lower cover plate 5 is welded and fixed with one end of the middle frame 3 to form a mold cavity, the shape and size of the lower cover plate 5 are adapted to the shape and size of the middle frame 3, the gap between the lower cover plate 5 and the middle frame 3 is avoided, the fixing effect of the middle frame 3 and the lower cover plate 5 is ensured, the gapless connection between the middle frame and the upper cover plate and the lower cover plate is ensured, zero assembly is realized, and battery liquid leakage is avoided.

[0027] In some embodiments, the connecting piece comprises a positive electrode connecting piece and a negative electrode connecting piece, the positive electrode connecting piece and the negative electrode connecting piece are arranged on the middle frame 3, the winding core 2 is provided with a positive electrode lug and a negative electrode lug, the positive electrode lug of the winding core 2 is connected with the positive electrode connecting piece, and the negative electrode lug of the winding core is connected with the negative electrode connecting piece.

[0028] In some embodiments, the middle frame 3 is provided with a liquid injection hole, and the liquid injection hole cover plate 4 is connected in the liquid injection hole.

[0029] Liquid is injected into the cavity through the liquid injection hole, so that the liquid can fill the entire cavity, the quality of the battery is improved, and the performance of the battery is ensured.

[0030] In some embodiments, the upper cover plate 1 and the lower cover plate 5 are welded and fixed at the upper and lower ends of the middle frame 3.

[0031] In the assembling process, firstly, the lower cover plate 5 is welded with one end of the middle frame 3 to form a cavity, the winding core 2 is installed in the cavity, the positive pole lug of the winding core 2 is welded with the positive pole connecting piece, the negative pole lug of the winding core 2 is welded with the negative pole connecting piece, and the insulation piece is pasted at the connecting position, then the upper cover plate 1 is welded at the other end of the middle frame 3, the winding core 2 is ensured to be located in the sealed cavity, liquid is injected into the cavity from the liquid injection hole, after the liquid injection is completed, the liquid injection hole cover plate 4 is welded at the liquid injection hole to avoid liquid flowing out, meanwhile, the structure of the assembled battery is more compact, the volume of the battery is reduced, and the capacity of the battery is enlarged.

[0032] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0033] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery steel casing, characterized in that, include: The housing includes a frame and a top cover. One end of the frame is provided with an opening. The top cover is disposed at the opening and is connected to the frame around its perimeter. The top cover is flush with the opening end of the frame and the top cover and the frame enclose a sealed cavity. A core is disposed within the sealed cavity. The shape of the core is adapted to the shape of the frame. A connector is provided on the frame, and the core is connected to the connector.

2. The battery steel casing according to claim 1, characterized in that, The frame includes a middle frame and a lower cover plate. The middle frame has openings at both the top and bottom ends. The upper cover plate and the lower cover plate are respectively connected to the openings at the top and bottom ends of the middle frame, and the ends of the upper cover plate and the lower cover plate that are far apart from each other are flush with the top and bottom ends of the middle frame.

3. The battery steel casing according to claim 2, characterized in that, The connector includes a positive electrode connector and a negative electrode connector, both of which are disposed on the middle frame. The core is provided with a positive electrode lug and a negative electrode lug. The positive electrode lug of the core is connected to the positive electrode connector, and the negative electrode lug of the core is connected to the negative electrode connector.

4. The battery steel casing according to claim 2, characterized in that, The middle frame is provided with a liquid injection hole, and a liquid injection hole cover plate is connected inside the liquid injection hole.

5. The battery steel casing according to claim 2, characterized in that, The upper and lower cover plates are fixed to the upper and lower ends of the middle frame by welding.

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