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Battery

A battery and cell technology, applied in secondary batteries, secondary battery manufacturing, battery pack components, etc., can solve the problems of uneven internal temperature, poor performance of cells, uncontrollable, etc., to achieve consistent reaction temperature, improve Cyclic performance, effect of reducing internal resistance

Inactive Publication Date: 2012-07-11
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the disadvantages of the existing battery such as uneven and uncontrollable internal temperature during operation, and poor performance and instability of the battery cell under complex working conditions, the present invention provides a uniform and controllable internal temperature, which can keep the battery cell continuously Batteries in good working condition

Method used

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Examples

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Effect test

Embodiment 1

[0035] as attached Figure 1-5 It is a structural schematic diagram of an electric core of the present invention.

[0036] After placing the parallel sheet-shaped positive and negative current and heat conduction parts 1 and 2 in parallel and at intervals, injection molding is performed on their surfaces to obtain an insulating core in which both ends of the positive and negative current and heat conduction parts 1 and 2 are exposed. piece 3. Insulator 5 is filled between the positive current conduction heat conduction part 1 and the negative pole current conduction heat conduction part 2 at the same time, and the positive pole current conduction heat conduction part 1 and the negative pole current conduction heat conduction part 2 are located in the insulating core part 3, that is, the positive pole current conduction heat conduction part 1 and the negative pole heat conduction part 1 The surface of the negative electrode current and heat conduction member 2 is covered with ...

Embodiment 2

[0045] Such as Figure 6-9 As shown, the battery is prepared in the same manner as in Example 1, the difference is that both the positive electrode flow and heat conduction element 1 and the negative electrode flow and heat conduction element 2 are made into U-shaped solid rods, and the U-shaped bottoms of the U-shaped solid rods are opposed to each other. Place them at intervals and inject molding on their surfaces to obtain insulating core parts 3 in which the ends of the positive and negative current-conducting and heat-conducting parts 1 and 2 are exposed. Insulator 5 is filled between the positive current conduction heat conduction part 1 and the negative pole current conduction heat conduction part 2 at the same time, and the positive pole current conduction heat conduction part 1 and the negative pole current conduction heat conduction part 2 are located in the insulating core part 3, that is, the positive pole current conduction heat conduction part 1 and the negative p...

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Abstract

The invention provides a battery, comprising a cover plate, a shell, a battery cell and electrolyte. The battery cell and the electrolyte are sealed in the shell of the battery, and the cover plate is hermetically connected with the shell. The battery cell comprises a positive polar plate, a negative polar plate and a diaphragm arranged between the positive polar plate and the negative polar plate. A positive polar lug is arranged on the positive polar plate, and a negative polar lug is arranged on the negative polar plate. The battery cell is further internally provided with a positive polar current and heat conducting member and a negative polar current and heat conducting member, and the positive polar current and heat conducting member and the negative polar current and heat conducting member are mutually insulated. The positive polar current and heat conducting member and the positive polar lug are conducted; the negative polar current and heat conducting member and the negative polar lug are conducted; the positive polar current and heat conducting member and / or the negative polar current and heat conducting member penetrate(s) through the cover plate to leading out current. According to the invention, the internal heat of the battery cell can be reduced rapidly, substances on the polar plates can be prevented from further thermal reaction, and thus, the safety performance of the battery is increased. Meanwhile, the stability of the internal temperature of the battery cell is guaranteed, the cyclic performance and the like of the battery are improved. In addition, the temperature at all parts in the battery cell can be ensured to be consistent so as to eliminate temperature differences and make the reaction temperature of all parts of the polar plates consistent. Meanwhile, the current and heat conducting members can play roles of backbone and support to support the battery cell, and is beneficial to not only assembly but also winding of the battery cell.

Description

technical field [0001] The invention relates to a battery. Background technique [0002] In the context of the depletion of non-renewable resources such as oil and the increasingly serious environmental pollution, people place great expectations on new energy vehicles. The power battery is the heart of the new energy vehicle, and it is required to have excellent power performance, cycle life and environmental tolerance. [0003] The power battery is basically in a mobile state when it is working, and its working environment is diverse. In order to provide high-power discharge and large energy supply, the power battery generally connects a large number of batteries in series and parallel to form a battery pack, and basically stores them in a sealed space for the appearance of the car, and the heat generated during use will continue to accumulate, while the shell dissipates heat The effect is slow and limited, and the internal temperature of the battery cannot be guaranteed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/50H01M2/26H01M50/271
CPCY02E60/12H01M10/5042H01M10/5046H01M10/5004H01M10/5044H01M10/5016Y02T10/7016H01M10/5032H01M2/1022H01M10/504H01M10/5034H01M10/625H01M10/653H01M10/647H01M10/654H01M10/6551H01M10/65H01M10/655H01M10/613Y02E60/10Y02P70/50H01M50/271
Inventor 刘建国仝志伟
Owner BYD CO LTD
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