Injection molding cover plate structure for lithium battery

Abstract

The utility model provides an injection molding cover plate structure for a lithium battery, which comprises the following structures: an aluminum shell in which a plurality of battery cells are stacked; according to the design combination of the aluminum plate, the injection molding plate is embedded in the bottom of the aluminum plate, the butt joint piece, the sleeve and the heat dissipation rod are embedded in the middle of the injection molding plate, the heat dissipation rod extends into the outer portion of the battery cells stacked in the aluminum shell, and in the process that the heat dissipation rod makes contact with the battery cells, heat generated by working of the battery cells is transmitted to the aluminum plate through the heat dissipation rod, the sleeve and the butt joint piece; the double-layer structure auxiliary heat dissipation structure design of the aluminum plate and the injection molding plate is completed, the heat dissipation efficiency of the aluminum plate and the injection molding plate of the lithium battery is improved, and the technical problem that an existing double-layer structure lithium battery cover plate is low in heat dissipation efficiency is solved.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to lithium battery cover plate technical field, concretely relates to a kind of injection molding cover plate structure for lithium battery. BACKGROUND

[0002] Lithium battery internally adopts multiple cell arrangement, finally connect with the anode column or cathode column on cover plate, wherein the heat dissipation treatment of cell is completed by the aluminum shell packaging of lithium battery, and its general aluminum plate stamping outer layer structure is arranged on cover plate structure, and inner layer structure with injection molding structure is further provided, the double-layer structure design of cover plate, compared with aluminum shell structure, there is low heat dissipation efficiency in the heat dissipation of cell work.

[0003] The utility model discloses an injection molding cover plate structure for lithium battery, which is provided with a heat conduction component, the heat conduction component is extended to the outside of the arranged cells, and a part of the heat generated by the cell work is transferred to the cover plate, thereby providing assistance for the heat dissipation design of the lithium battery, and avoiding the influence of the low heat dissipation efficiency of the double-layer structure cover plate on the working stability of the lithium battery. UTILITY MODEL CONTENTS

[0004] 1. The utility model solves the technical problem of low heat dissipation efficiency of the existing double-layer structure lithium battery cover plate.

[0005] The utility model provides an injection molding cover plate structure for lithium battery, which solves the technical problem of low heat dissipation efficiency of the existing double-layer structure lithium battery cover plate.

[0006] 2. Technical scheme

[0007] To achieve the above-mentioned purpose, the utility model provides a technical scheme for an injection molding cover plate structure for lithium battery, which comprises the following structures:

[0008] Aluminum shell, the inside of the aluminum shell is stacked with multiple cells.

[0009] Aluminum plate, the bottom of the aluminum plate is nested with an injection molding plate, and the middle part of the injection molding plate is nested with a butt joint piece.

[0010] Further, the outer side of the aluminum plate is fixedly connected with the top opening of the aluminum shell, the top left and right sides of the aluminum plate are respectively provided with an anode column and a cathode column, and the middle part of the aluminum plate is nested with a pressure relief valve, and the input end of the pressure relief valve extends to the inside of the aluminum shell.

[0011] Further, the left and right sides of the aluminum plate about the pressure relief valve are both provided with a butt joint hole, and the butt joint hole is arranged in an S shape.

[0012] Further, the shape of the butt joint piece is matched with the butt joint hole, and the top of the butt joint piece extends to the top surface of the aluminum plate.

[0013] Further, the bottom of the butt joint sheet is welded with a sleeve, the bottom of the sleeve is clamped with a heat dissipation rod, the outer side of the heat dissipation rod is attached to the outer side of the battery cell, and the heat dissipation rod extends to the stacking gap of the plurality of battery cells.

[0014] Further, the bottom of the heat dissipation rod penetrates from the inner side to the outer side of the bottom of the aluminum shell, the middle part of the heat dissipation rod is fixedly provided with a flow guide hole penetrating from the bottom to the top thereof, and the top of the flow guide hole extends to the top of the aluminum plate.

[0015] 3. Beneficial effects:

[0016] Compared with the prior art, the technical scheme has the following beneficial effects:

[0017] The utility model provides a kind of injection cover plate structure for lithium battery, sleeve and the design combination of heat dissipation rod, heat dissipation rod is inserted into the outside of the battery cell stacked in aluminum shell, and the heat generated in the process of contacting battery cell is transferred to aluminum plate by heat dissipation rod, sleeve and butt joint sheet, complete double-layer structure auxiliary heat dissipation structure design of injection plate and aluminum plate, improve the heat dissipation efficiency of lithium battery's aluminum plate and injection plate place;

[0018] The utility model provides a kind of injection cover plate structure for lithium battery, considering that heat dissipation rod is handled to the heat dissipation of the battery cell stacked in aluminum shell, can set flow guide hole to heat dissipation rod, the penetration design of heat dissipation rod on aluminum shell and flow guide hole extend to the top of aluminum plate, facilitate user in subsequent product application in the flow guide hole of heat dissipation rod design waterway or air cooling pipe, further improve the heat dissipation efficiency of the equipment of this equipment;

[0019] The parts not involved in the device are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the perspective view of the structure of the utility model;

[0021] Figure 2 It is the half cutaway perspective view of the aluminum shell structure of the utility model;

[0022] Figure 3 It is the half cutaway perspective view of the aluminum plate structure of the utility model;

[0023] Figure 4 It is the utility model Figure 3 The enlarged view of structure A in the utility model.

[0024] REFERENCE NUMERALS:

[0025] Aluminum shell-1;

[0026] Battery cell-2;

[0027] Aluminum plate-3; Butt joint hole-31;

[0028] Anode column-4;

[0029] Cathode column-5;

[0030] Pressure relief valve-6;

[0031] Injection molding plate-7;

[0032] Docking piece-8; sleeve-81; heat dissipation rod-82. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, wherein several embodiments of the present application are given, however, the present application can be realized in many different forms and is not limited to the embodiments described herein, on the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or there can be intervening elements; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present; the terms "vertical", "horizontal", "left", "right", and the like as used herein are for purposes of illustration and description only and are not intended to limit the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0036] Referring to the accompanying drawings Figures 1-4 The present application provides a kind of injection cover plate structure for lithium battery, including the following structure:

[0037] Aluminum shell 1, multiple electric cores 2 are stacked in the inside of aluminum shell 1.

[0038] Aluminum plate 3, injection molding plate 7 is nested in the bottom of aluminum plate 3, docking piece 8 is nested in the middle of injection molding plate 7.

[0039] In the embodiment, the outside of aluminum plate 3 is fixedly connected with the top opening of aluminum shell 1, the top left and right sides of aluminum plate 3 are respectively fixedly provided with anode column 4 and cathode column 5, the middle of aluminum plate 3 is nested with pressure relief valve 6, and the input end of the pressure relief valve 6 extends to the inside of aluminum shell 1.

[0040] Anode column 4, cathode column 5 and pressure relief valve 6 are arranged on aluminum plate 3, which is based on the conventional layout design of the current product.

[0041] In this embodiment, aluminum plate 3 is fixedly provided with butt joint holes 31 on the left and right sides of pressure relief valve 6, and the butt joint holes 31 are arranged in an S shape.

[0042] The S-shaped arrangement of the butt joint holes 31 matches the butt joint piece 8, thereby increasing the contact area of the butt joint piece 8 and the aluminum plate 3.

[0043] In this embodiment, the shape of the butt joint piece 8 is adapted to the butt joint hole 31, and the top of the butt joint piece 8 extends to the top surface of the aluminum plate 3.

[0044] In combination with the high integration structure design of the lithium battery, in order to increase the contact area of the butt joint piece 8 and the aluminum plate 3, while avoiding expanding the structure size of the lithium battery, the butt joint holes 31 are arranged on the aluminum plate 3, thereby increasing the contact area of the butt joint piece 8 and the aluminum plate 3.

[0045] In this embodiment, the bottom of the butt joint piece 8 is welded with a sleeve 81, and the bottom of the sleeve 81 is connected with a heat dissipation rod 82, the outer side of the heat dissipation rod 82 is attached to the outer side of the battery cell 2, and the heat dissipation rod 82 extends to the stacking gap of the plurality of battery cells 2.

[0046] The design combination of the sleeve 81 and the heat dissipation rod 82 extends the heat dissipation rod 82 into the battery cells 2 stacked in the aluminum shell 1, and in the process of contacting the battery cells 2, the heat generated by the working of the battery cells 2 is transmitted to the aluminum plate 3 through the heat dissipation rod 82, the sleeve 81 and the butt joint piece 8, thereby completing the double-layer structure auxiliary heat dissipation structure design of the aluminum plate 3 and the injection molding plate 7, and improving the heat dissipation efficiency of the aluminum plate 3 and the injection molding plate 7 of the lithium battery.

[0047] In this embodiment, the bottom of the heat dissipation rod 82 penetrates from the inner side to the outer side of the bottom of the aluminum shell 1, and the middle part of the heat dissipation rod 82 is fixedly provided with a flow guide hole penetrating from the bottom to the top, and the top of the flow guide hole extends to the top of the aluminum plate 3.

[0048] Considering the heat dissipation treatment of the heat dissipation rod 82 to the battery cells 2 stacked in the aluminum shell 1, the heat dissipation rod 82 can be provided with a flow guide hole, and the heat dissipation rod 82 is designed to penetrate the aluminum shell 1 and the flow guide hole extends to the top of the aluminum plate 3, which facilitates the user to design water pipes or air cooling pipes at the flow guide hole of the heat dissipation rod 82 in subsequent product applications, thereby further improving the heat dissipation efficiency of the device.

[0049] The above-described embodiments only express certain implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the present application; it should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application; therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A structure for an injection-molded cover plate for lithium batteries, characterized in that: Includes the following structure: An aluminum shell (1) has multiple battery cells (2) stacked inside it. An aluminum plate (3) is nested at the bottom of the aluminum plate (3), and a mating piece (8) is nested in the middle of the injection molded plate (7).

2. The injection-molded cover structure for lithium batteries according to claim 1, characterized in that: The outer side of the aluminum plate (3) is fixedly connected to the top opening of the aluminum shell (1). Anode column (4) and cathode column (5) are fixedly provided on the left and right sides of the top of the aluminum plate (3). A pressure relief valve (6) is nested in the middle of the aluminum plate (3). The input end of the pressure relief valve (6) extends to the inner side of the aluminum shell (1).

3. The injection-molded cover structure for lithium batteries according to claim 1, characterized in that: The aluminum plate (3) is provided with docking holes (31) on both the left and right sides of the pressure relief valve (6), and the docking holes (31) are arranged in an S-shape.

4. The injection-molded cover structure for lithium batteries according to claim 1, characterized in that: The shape of the mating piece (8) is adapted to the mating hole (31), and the top of the mating piece (8) extends to the top surface of the aluminum plate (3).

5. The injection-molded cover structure for lithium batteries according to claim 1, characterized in that: The bottom of the docking piece (8) is welded with a sleeve (81), and the bottom of the sleeve (81) is snapped with a heat sink rod (82). The outer side of the heat sink rod (82) is in contact with the outer side of the battery cell (2), and the heat sink rod (82) extends to the stacking gap of multiple battery cells (2).

6. The injection-molded cover structure for lithium batteries according to claim 5, characterized in that: The bottom of the heat sink (82) extends from the inner side to the outer side of the bottom of the aluminum shell (1), and a guide hole is fixed in the middle of the heat sink (82) extending from its bottom to its top. The top of the guide hole extends to the top of the aluminum plate (3).

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