Mounting structure of battery adapter plate and pole

Abstract

The utility model relates to the technical field of power batteries, in particular to a mounting structure of a battery adapter plate and a pole, which can greatly reduce the manufacturing cost of the battery, improve the energy density of the battery and simultaneously ensure the safety of the battery through the connecting structure. And parts are simpler, a simple connection mode replaces laser welding equipment, and the manufacturing cost is saved. The connection mode of the adapter sheets is flexible, and the tool cost is saved; the weight of the battery cell is reduced and the energy density of the battery cell is improved due to the simple adapter plate design; the size of the holes in the adapter plate can be determined according to actual use conditions, the weight of the adapter plate can be reduced due to the design of the holes, and the adapter plate can be fused in time to serve as a fuse in the use process of the battery when the temperature is too high, so that thermal runaway is prevented. According to the utility model, the technical problems of complex design, high cost and potential safety hazard of the connection mode of the existing adapter sheet can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field especially relates to a battery adapter piece and the mounting structure of pole. BACKGROUND

[0002] In the manufacturing process of lithium battery, the overcurrent capacity of adapter piece is extremely important for the performance and safety of lithium battery, so the connection among the three of tab, adapter piece and top cover is an important link in the production and assembly process of lithium battery.

[0003] The existing copper-aluminum adapter piece and top cover pole are laser welded, the copper-aluminum adapter piece is placed on the lower plastic part connected with the top cover, the copper-aluminum adapter piece is connected with the positive and negative poles through laser welding, the positive and negative tabs are fixed on the aluminum-copper adapter piece through ultrasonic welding, and after welding and fixing, the battery cell is assembled next. For example, in the manufacturing process of square aluminum shell lithium ion battery, different types of adapter pieces are usually used to be connected with the poles through laser welding, the upper part of the adapter piece is connected with the pole, and the two sides are extended and ultrasonically welded with the tabs. This type of adapter piece has the problem of not being able to melt down in time when the temperature is too high, thereby causing safety hazards. In addition, laser welding is a relatively mature connection method in the current battery cell production, but its cost is high, and the metal adapter piece increases the weight of the battery cell, thereby reducing the energy density of the battery cell.

[0004] Therefore, the prior art has the following disadvantages:

[0005] 1. The existing laser welding tooling is complex and has high cost.

[0006] 2. The existing adapter piece design is too complex, and the weld mark (copper pole weld mark) of laser welding with the pole is easily oxidized and blackened when the battery cell is packaged into a finished product, and the battery cell has risks after long-term use. The welding position of the pole and the adapter piece is easily affected by the environment and the quality of the parts, and welding defects occur, which affects the performance and safety of the battery cell.

[0007] 3. The copper-aluminum adapter piece has a single shape, and the conventional hole opening method can cause the overcurrent area to be narrow, so that the adapter piece cannot melt down in time when the temperature rises too high, thereby causing safety hazards. UTILITY MODEL CONTENTS

[0008] The utility model aims at providing a battery adapter piece and the mounting structure of pole, which can solve the technical problems of complex design, high cost and safety hazards of the existing adapter piece connection method.

[0009] In order to achieve the above object, the utility model discloses a kind of installation structure of battery adapter plate and pole, including pole, top cover, pole positioning peg, adapter plate, the pole is arranged on the top cover, the pole positioning peg is arranged on the pole, the adapter plate is located above the pole, and the adapter plate is attached with the pole by the pole positioning peg.

[0010] As a preferred scheme, the adapter plate includes pole connecting part, positioning connecting part, the pole connecting part is equipped with pole mounting hole matched with the pole positioning peg, and the positioning connecting part is equipped with lower plastic part positioning hole and fuse hole.

[0011] As a preferred scheme, the installation structure further includes lower plastic part positioning peg and fuse positioning peg arranged on the top cover, and the lower plastic part positioning peg and the fuse positioning peg are matched with the lower plastic part positioning hole and the fuse hole respectively.

[0012] Further, the pole connecting part and the positioning connecting part are arc-shapedly connected.

[0013] As a preferred scheme, the adapter plate is two, and symmetrically arranged above the pole.

[0014] The utility model has the advantages of:

[0015] The installation structure of battery adapter plate and pole provided by the utility model can greatly reduce the manufacturing cost of battery, improve the energy density of battery, and ensure the safety of battery.

[0016] 1. The parts are simpler, and the simple connection mode replaces the laser welding equipment, saving the manufacturing cost.

[0017] 2. The connection mode of the adapter plate is flexible, saving the tooling cost.

[0018] 3. The simple adapter plate design reduces the weight of the battery cell and improves the energy density of the battery cell.

[0019] 4. The size of the hole in the adapter plate can be determined according to actual use, and the hole design can reduce the weight of the adapter plate. In the process of using the battery, the adapter plate can be fused in time when the temperature is too high, acting as a fuse to prevent thermal runaway. DRAWINGS

[0020] Figure 1 It is a plane schematic view of the adapter plate.

[0021] Figure 2 It is a three-dimensional schematic view of the top cover and the pole.

[0022] Figure 3 is a plan view of the top cover and the pole.

[0023] Figure 4 is an assembly view of the top cover, the pole and the adapter plate.

[0024] Explanation of reference signs:

[0025] The pole 1, the top cover 2, the pole positioning stud 3, the lower plastic part positioning stud 4, the fuse positioning stud 5, the adapter plate 6 (the pole connecting part 61, the positioning connecting part 62, the pole mounting hole 63, the lower plastic part positioning hole 64, the fuse hole 65). DETAILED DESCRIPTION

[0026] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described here are only used to explain the present application, but not limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all.

[0027] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0028] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0029] The utility model relates to a kind of installation structure of battery adapter plate and pole, by this connecting structure, can greatly reduce the manufacturing cost of battery, improve the energy density of battery, while guarantee the security of battery.The component is simpler, and simple connection mode replaces laser welding equipment, saves manufacturing cost.The connection mode of adapter plate is flexible, saves tooling cost;Simple adapter plate design, reduces the weight of battery cell, improves the energy density of battery cell;The size of the hole in adapter plate can be determined according to actual use, and the hole design can reduce its own weight, in the process of battery use, when temperature is too high, adapter plate can be fused in time, act as fuse, prevent the occurrence of thermal runaway.The utility model can solve the technical problems of existing adapter plate connection mode design, high cost, and security risk.

[0030] As Figures 2 to 4 Shown, the installation structure includes pole 1, top cover 2, pole positioning peg 3, adapter plate 6, and be provided on the top cover 2 lower plastic piece positioning peg 4, fuse positioning peg 5.The pole 1 is arranged on the top cover 2, the pole positioning peg 3 is arranged on the pole 1, the adapter plate 6 is located above the pole 1, and is attached with the pole 1 by the pole positioning peg 3.The adapter plate 6 is two, and symmetrically arranged above the pole 1.

[0031] As Figure 1 Shown, the adapter plate 6 includes pole connecting portion 61, positioning connecting portion 62, the pole connecting portion 61 is equipped with pole mounting hole 63 matched with the pole positioning peg 3, the positioning connecting portion 62 is equipped with lower plastic piece positioning hole 64, fuse hole 65.The lower plastic piece positioning peg 4, fuse positioning peg 5 are matched with the lower plastic piece positioning hole 64, fuse hole 65 respectively.The arc connection between the pole connecting portion 61 and the positioning connecting portion 62.

[0032] The adapter plate introduced in the utility model uses a new design, splits the adapter plate into two parts, and designs three positioning mounting holes on the adapter plate.Pole positioning peg and lower plastic piece positioning peg of same material are designed on the top cover pole bottom plane.

[0033] Figure 1 Shown simplified adapter plate design, cancels the traditional adapter plate and pole bottom laser welding part, and two-part adapter plate is directly connected with pole, and three positioning mounting holes are opened on the adapter plate, and the middle hole position is designed with fuse function, and acts as fuse.When battery cell temperature is too high, adapter plate is fused in time, to avoid fire caused by overcharge.The size of the adapter plate and the size of the three positioning holes can be determined according to actual demand, and the material is preferably copper or aluminum.

[0034] Figure 2 、 3The top cover and the pole are shown in a perspective view and a plane view, three positioning bolt columns are respectively arranged on the two sides of the pole and the lower plastic part, and are used for fixing the adapter piece, the size of the positioning bolt column can be determined according to actual requirements, the column body is made of the same material as the base body; the top cover is optimized, the design of the top cover is optimized according to the simplified adapter piece, so that the top cover is matched with the simplified adapter piece, and the stability of the whole structure of the battery cell is improved. The simplified adapter piece and the top cover are connected together, then the battery cell is placed in the shell, and finally the shell is sealed. The above is the specific steps of the embodiment, through the connecting structure, the manufacturing cost of the battery can be greatly reduced, the energy density of the battery is improved, and the safety of the battery is ensured.

[0035] The above-mentioned embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A battery tab and post mounting structure, characterized by: The pole (1), the top cover (2), the pole positioning bolt column (3), the adapter plate (6), the pole (1) is arranged on the top cover (2), the pole positioning bolt column (3) is arranged on the pole (1), the adapter plate (6) is located above the pole (1) and is attached to the pole (1) through the pole positioning bolt column (3).

2. The battery tab and post mounting structure of claim 1, wherein: The adapter plate (6) includes a pole connecting part (61) and a positioning connecting part (62), the pole connecting part (61) is provided with a pole mounting hole (63) matched with the pole positioning bolt column (3), and the positioning connecting part (62) is provided with a lower plastic part positioning hole (64) and a fuse hole (65).

3. The battery tab-to-post mounting structure of claim 2, wherein: The mounting structure further includes a lower plastic part positioning bolt column (4) and a fuse positioning bolt column (5) arranged on the top cover (2), and the lower plastic part positioning bolt column (4) and the fuse positioning bolt column (5) are matched with the lower plastic part positioning hole (64) and the fuse hole (65) respectively.

4. The battery tab-to-post mounting structure of claim 2, wherein: The pole connecting part (61) and the positioning connecting part (62) are arc-shapedly connected.

5. The mounting structure of a battery tab and a post according to any one of claims 1 to 4, characterized in that: The adapter plate (6) is two and symmetrically arranged above the pole (1).

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