Split type shell structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a split type shell structure and a battery, the split type shell structure comprises a shell and a top cover sheet, the shell comprises a bent main shell, two ends of the main shell are respectively provided with an end opening, and the top of the main shell is provided with a top opening; the top cover plate covers the top opening, the side plates cover the end openings, the thickness of the side plates is larger than that of the main shell, and the main shell, the top cover plate and the two side plates enclose to form an inner cavity for placing a battery cell; the shell adopts a split structure, and the thickness of the main shell is smaller than that of the side plate, so that the thickness of the main shell is reduced, the storage space of the inner cavity is increased, and the capacity density of the battery is improved; secondly, the thickness of the side plate is greater than that of the main shell, so that the structural strength of the shell structure can be enhanced, and the structural strength of the battery is improved; in addition, the thickness of the main shell and the thickness of the side plate are not equal, when the internal air pressure of the inner cavity is too large, the main shell expands and deforms preferentially, and the effect of controlling the deformation direction of the shell structure is achieved.

Description

TECHNICAL FIELD

[0001] The utility model discloses a technical field of pole, concretely relates to split type shell structure and battery. BACKGROUND

[0002] The structure of battery can be divided into internal structure and shell structure two parts, and the shell structure includes top cover assembly and shell two parts, and the internal structure is electric core. In order to achieve the goal of " pursuing higher energy density " of battery, it needs to optimize battery.

[0003] At present, in order to realize the optimization of battery, the thickness of shell structure is generally thinned to provide more space for electric core, but the top cover sheet is prone to deformation when the top cover assembly is thinned, causing the fluctuation of the explosion-proof sheet blasting value and reducing the safety factor of product.

[0004] In the prior art, the production of the shell is mainly in the form of integrated stretching, which is limited by the material stretching coefficient, and needs to be stretched multiple times to form a complete shell, and needs annealing treatment in the middle, so the production efficiency is low, and when the thickness of the shell is reduced to a certain extent, the integrated stretching cannot be formed, and the overall strength of the shell structure is reduced, which reduces the quality of the battery. UTILITY MODEL CONTENTS

[0005] The utility model discloses a split type shell structure, which aims to solve the problem of low strength of the shell structure in the prior art.

[0006] The utility model discloses a split type shell structure, which aims to solve the problem of low strength of the shell structure in the prior art.

[0007] Further, the main shell includes two spaced apart panels, a bottom plate is arranged between the bottoms of the two panels, the end openings are formed between the ends of the two panels, and the top openings are formed between the tops of the two panels.

[0008] Further, the thickness of the side plate is greater than the thickness of the panel.

[0009] Further, the bottom of the top cover sheet is provided with a mounting step, the mounting step is arranged around the circumference of the top cover sheet, and the top of the panel and the top of the side plate are embedded in the mounting step respectively.

[0010] Further, the top cover sheet is provided with an explosion-proof area arranged in a hollow manner, the outer periphery of the explosion-proof area is arched upward to form a protruding connecting ring arranged along the circumferential direction of the explosion-proof area; the explosion-proof area is provided with an explosion-proof sheet, and the outer periphery of the explosion-proof sheet is connected with the connecting ring.

[0011] Further, the bottom of the connecting ring is recessed upward to form an annular groove arranged along the circumferential direction of the explosion-proof area, and the outer periphery of the explosion-proof sheet is embedded in the annular groove.

[0012] Further, the connecting ring is arranged in a curved manner along the direction towards the center of the explosion-proof area.

[0013] Further, the explosion-proof sheet is provided with a reinforcing rib protruding thereon, and the reinforcing rib is arranged in a closed loop shape.

[0014] Further, the reinforcing rib is arranged in a diamond shape.

[0015] Compared with the prior art, the split type shell structure provided by the utility model has the shell adopting a split type structure, and the thickness of the main shell is smaller than the thickness of the side plate, so that the thickness of the main shell is reduced, the storage space of the inner cavity is increased, and the battery capacity density is improved; secondly, the thickness of the side plate is greater than the thickness of the main shell, so that the structural strength of the shell structure is enhanced, and the structural strength of the battery is improved; in addition, the thickness of the main shell and the side plate is not equal, when the internal air pressure of the inner cavity is too large, the main shell will be deformed by expansion first, so that the deformation direction of the shell structure is controlled.

[0016] The utility model also provides a battery comprising the split type shell structure.

[0017] Compared with the prior art, the shell of the shell structure adopts a split type structure, the thickness of the main shell is reduced, the storage space of the battery is increased, the battery capacity density is improved, the thickness of the side plate is greater than the thickness of the main shell, the structural strength of the shell structure can be enhanced, and the structural strength of the battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a three-dimensional schematic view of the split type shell structure provided by the utility model;

[0019] Figure 2 is a sectional view of the split type shell structure provided by the utility model;

[0020] Figure 3 is Figure 1 the enlarged view of A in the figure;

[0021] Figure 4 is a partial sectional view of the top cover sheet provided by the utility model;

[0022] Figure 5 is a partial sectional view of the top cover sheet provided by the utility model;

[0023] In the drawing: panel 101, side plate 102, top cover sheet 103, bottom plate 104, inner cavity 105, mounting step 106; connecting ring 200, explosion-proof area 201, annular groove 202; explosion-proof sheet 300, reinforcing rib 301. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0025] The implementation of the utility model is described in detail below in combination with specific examples.

[0026] In the drawings of the examples, the same or similar reference signs correspond to the same or similar components; in the description of the utility model, it should be understood that the orientation or position relationship indicated by terms such as "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the patent, for ordinary skilled persons in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] Referring to Figures 1-5 , a preferred example provided by the utility model is shown.

[0028] The split type shell structure includes a shell and a top cover sheet 103, the shell includes a main shell in a bent shape, the two ends of the main shell have end openings respectively, and the top of the main shell has a top opening; the top cover sheet 103 covers the top opening, the end openings are covered with side plates 102, the thickness of the side plates 102 is greater than the thickness of the main shell, and the main shell, the top cover sheet 103 and the two side plates 102 enclose an inner cavity 105 for placing the battery cell.

[0029] The split type shell structure provided above, the shell adopts a split type structure, and the thickness of the main shell is less than the thickness of the side plates 102, which reduces the thickness of the main shell, increases the storage space of the inner cavity 105, and improves the battery capacity density; secondly, the thickness of the side plates 102 is greater than the thickness of the main shell, which can enhance the structural strength of the shell structure and improve the structural strength of the battery; in addition, the thickness of the main shell and the side plates 102 is not equal, when the internal pressure of the inner cavity 105 is too large, the main shell will deform preferentially, which can control the deformation direction of the shell structure.

[0030] In the embodiment, the main shell comprises two spaced-apart panels 101, a bottom plate 104 is arranged between the bottoms of the two panels 101, the end openings are formed between the ends of the two panels 101, and the top openings are formed between the tops of the two panels 101.

[0031] The bottom plate 104 is formed between the bottoms of the two panels 101, so that the main shell is arranged in a bent shape, which can be integrally bent to ensure the overall structural strength of the main shell.

[0032] In the embodiment, the thickness of the side plate 102 is greater than the thickness of the panel 101. Since the area size of the panel 101 is greater than the area size of the side plate 102, when the internal pressure in the inner cavity 105 is too large, the panel 101 will preferentially expand and deform, thereby controlling the deformation direction of the shell structure.

[0033] In the embodiment, the bottom of the top cover sheet 103 is provided with a mounting step 106, the mounting step 106 is arranged along the circumference of the top cover sheet 103, and the top of the panel 101 and the top of the side plate 102 are embedded in the mounting step 106, respectively.

[0034] By arranging the mounting step 106, a welding position can be provided for the fixed mounting of the top cover sheet 103, the welding hook is simplified, and the product yield of the battery is improved. Secondly, the space of the top cover sheet 103 is avoided, and the shape and area of the top cover sheet 103 can be customized according to the required current-carrying capacity. In addition, when the top cover sheet 103 is welded and fixed, the difficulty during debugging is greatly reduced.

[0035] In the embodiment, the top cover sheet 103 is provided with an explosion-proof area 201 arranged in a hollow manner, the outer periphery of the explosion-proof area 201 is arched upward to form a convex connection ring 200, the connection ring 200 is arranged along the circumference of the explosion-proof area 201, and the explosion-proof area 201 is provided with an explosion-proof sheet 300, and the outer periphery of the explosion-proof sheet 300 is connected with the connection ring 200.

[0036] Connecting the explosion-proof sheet 300 to the connection ring 200 can reduce the deformation of the top cover sheet 103, thereby avoiding the influence on the blasting value of the explosion-proof sheet 300. In addition, the convex connection ring 200 can be used as a reinforcing structure of the top cover sheet 103 to strengthen the structural strength of the top cover sheet 103 and reduce the degree of deformation of the top cover sheet 103.

[0037] In the embodiment, the bottom of the connection ring 200 is recessed upward to form an annular groove 202, the annular groove 202 is arranged along the circumference of the explosion-proof area 201, and the outer periphery of the explosion-proof sheet 300 is embedded in the annular groove 202. In this way, the outer periphery of the explosion-proof sheet 300 is matched with the connection ring 200, and the explosion-proof sheet 300 and the connection ring 200 are welded and fixed.

[0038] In the embodiment, the connecting ring 200 is arranged in a curved shape along the direction towards the center of the explosion-proof area 201 of the connecting ring 200, so that the structural strength of the connecting ring 200 is greatly enhanced, and the structural strength of the entire top cover sheet 103 is enhanced, and when the explosion-proof sheet 300 is welded on the connecting ring 200, the deformation of the top cover sheet 103 is avoided.

[0039] In the embodiment, the reinforcing ribs 301 are arranged on the explosion-proof sheet 300 in a closed loop shape. By arranging the reinforcing ribs 301, when the explosion-proof sheet 300 is stressed, the pressure can be effectively dispersed and resisted, the deformation degree of the explosion-proof sheet 300 is reduced, and the blasting value of the explosion-proof sheet 300 is stabilized.

[0040] As a preferred embodiment, the reinforcing ribs 301 are arranged in a rhombus shape. Due to the characteristics that the diagonals of the rhombus are perpendicular to each other and bisect each other, the four sides of the rhombus are equal and dispersed, which can ensure that the reinforcing strength is consistent, and as many cross sections as possible have two reinforcing ribs 301.

[0041] The embodiment also provides a battery comprising the split shell structure.

[0042] The shell of the shell structure adopts a split structure, and the thickness of the main shell is reduced, the storage space of the battery is increased, the capacity density of the battery is improved, and the thickness of the side plate 102 is greater than the thickness of the main shell, which can enhance the structural strength of the shell structure and improve the structural strength of the battery.

[0043] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A split housing structure, characterized by, The shell includes a main shell in a bent shape, two ends of the main shell are respectively provided with end openings, and a top of the main shell is provided with a top opening; the top cover sheet covers the top opening, and the end openings are covered with side plates, the thickness of the side plates is greater than the thickness of the main shell, and the main shell, the top cover sheet and the two side plates enclose an inner cavity for placing an electric core.

2. The split housing structure of claim 1, wherein, The main shell includes two spaced-apart panels, a bottom plate is arranged between the bottoms of the two panels, the end openings are formed between the ends of the two panels, and the top openings are formed between the tops of the two panels.

3. The split housing structure of claim 2, wherein, The thickness of the side plates is greater than the thickness of the panels.

4. The split housing structure of claim 2, wherein, A mounting step is arranged on the bottom of the top cover sheet, the mounting step is arranged around the circumference of the top cover sheet, and the top of the panel and the top of the side plate are respectively embedded in the mounting step.

5. The split housing structure of any one of claims 1 to 4, wherein, An explosion-proof area in a hollow arrangement is arranged in the top cover sheet, the outer periphery of the explosion-proof area is arched upward to form a convex connection ring, the connection ring is arranged around the circumference of the explosion-proof area, and the explosion-proof area is provided with an explosion-proof sheet, and the outer periphery of the explosion-proof sheet is connected with the connection ring.

6. The split housing structure of claim 5, wherein, The bottom of the connection ring is recessed upward to form an annular groove, the annular groove is arranged around the circumference of the explosion-proof area, and the outer periphery of the explosion-proof sheet is embedded in the annular groove.

7. The split housing structure of claim 5, wherein, The connection ring is arranged in a curved shape in the direction of the center of the explosion-proof area along the connection ring.

8. The split housing structure of claim 5, wherein, A reinforcing rib is protruded on the explosion-proof sheet, and the reinforcing rib is arranged in a closed loop shape.

9. The split housing structure of claim 8, wherein, The reinforcing rib is arranged in a diamond shape.

10. A battery characterized by The split shell structure of any one of claims 1 to 9 is included.

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