CN202259459U - Power type lithium ion battery structure - Google Patents

Abstract

The utility model discloses a power type lithium ion battery structure which comprises a shell, an anode electrode and a cathode electrode, wherein the anode electrode and the cathode electrode are stacked with each other and are located in the shell; a diaphragm which is used for reliably insulating two electrode slices is arranged between the anode electrode and the cathode electrode; at least one anode tab and cathode tab are respectively led from one ends of the anode electrode and the cathode electrode; and the anode tab and the cathode tab are respectively fixed outside two ends of the shell. The battery has excellent radiating property; during a discharging process, the temperature of the battery is not obviously changed; the phenomena of short circuit and micro short circuit are greatly reduced; the safety is increased; and the outer surface of the shell of the battery is designed in an arch-shaped array, and air channels along horizontal, vertical and inclined directions are formed on the surfaces of the shells of adjacent batteries after monomer batteries are stacked, so that the radiating effect of a whole battery pack can be increased.

Description

A power type lithium-ion battery structure

technical field

The utility model belongs to the technical field of electrical components and relates to a power type lithium ion battery structure.

Background technique

At present, power lithium-ion batteries have been popularized and applied in electric vehicles due to their advantages such as high energy density, high voltage, wide operating temperature range, and long life. The current power lithium-ion battery adopts the method of leading out a positive and a negative tab at one end. When the battery is charged and discharged, the current density at the tab is too high, and the heat generated by the battery current collector is not easy to dissipate, which affects the performance of the battery. In addition, when the battery is in use, the single cells are stacked together to form a battery pack. In order to dissipate the heat generated by the battery during use, the usual design is to add horizontal or vertical ribs on the surface of the battery case. Only horizontal or vertical heat dissipation and ventilation can be formed, and other directions will be closed after stacking, and the heat dissipation effect is not ideal, which affects the performance of the entire battery pack. Therefore, it is an important research topic to design a power lithium-ion battery with good thermal conductivity and excellent heat dissipation effect after stacking.

Utility model content

The technical problem to be solved by the utility model is to provide a power type lithium-ion battery structure with good heat dissipation performance, which can improve the safety performance of the battery and the heat dissipation effect of the stacked battery pack.

The technical solution of the utility model is as follows:

A power type lithium-ion battery structure, comprising a casing and a positive electrode and a negative electrode positioned in the casing; a diaphragm is provided between the positive electrode and the negative electrode to reliably insulate the two pole pieces, and one end of the positive electrode and one end of the negative electrode One end leads out at least one positive pole ear and negative pole lug respectively, and the positive pole ear and the negative pole ear are respectively fixed on the outer sides of both ends of the housing; the outer wall of the housing adopts a circular arch array structure composed of a plurality of circular arch blocks arranged .

The arched array is similar to the epidermis structure of pineapple (that is, the pineapple epidermal structure), and consists of multiple arched blocks.

The number of the positive tab and the negative tab are equal, 1 to 5.

Beneficial effect:

The utility model power lithium-ion battery structure adopts the method of leading out the tabs at both ends of the battery shell, which has good heat dissipation performance, and at the same time, the outer surface of the battery shell is designed as a circular arched array structure, which can improve the heat dissipation of the stacked battery pack Effect.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the power type lithium-ion battery of the utility model.

In the figure, 1 is the positive tab, 2 is the casing whose outer surface forms a circular arch array, 3 is the circular arch on the outer surface of the casing, 4 is the negative tab, 5 is the negative electrode piece, and 6 is the positive electrode piece.

Detailed ways

The utility model will be described in further detail below in conjunction with accompanying drawing and specific embodiment:

As shown in Figure 1, a kind of power type lithium-ion battery structure, comprises shell and is positioned at the positive electrode and the negative electrode in the shell; The diaphragm that will reliably insulate the two pole pieces is provided between the positive electrode and the negative electrode, the positive electrode One end of the electrode and one end of the negative electrode lead out at least one positive pole ear and negative pole ear respectively, and the positive pole ear and the negative pole ear are respectively fixed on the outer sides of the two ends of the shell; arched array structure.

The number of the positive tab and the negative tab are equal, 1 to 5.

The utility model adopts the method of leading out tabs at both ends of the battery shell, has good heat dissipation performance, does not produce obvious changes in battery temperature during discharge, greatly reduces short-circuit and micro-short-circuit phenomena, and improves safety performance. At the same time, the outer surface of the battery case is designed as a circular arch array. After each single battery is stacked, air ducts in various directions such as horizontal, vertical and oblique will be formed on the surface of the adjacent battery case, which can improve the heat dissipation effect of the entire battery pack.

Claims (2)

1. a power-type lithium ion battery structure is characterized in that, comprises housing and the positive electrode and the negative electrode that are positioned at housing; Be provided with the barrier film with the reliable insulation of two pole pieces between said positive electrode and the negative electrode, an end of positive electrode and an end of negative electrode are drawn at least one anode ear and negative electrode lug respectively, and anode ear and negative electrode lug are separately fixed at the outside at housing two ends; The outer wall of said housing adopts the dome-shaped array structure of being arranged and being formed by a plurality of circular arch type blockss.

2. power-type lithium ion battery structure as claimed in claim 1 is characterized in that, the quantity of said anode ear and negative electrode lug equates, is 1～5.

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