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Protective device, protective device system and protective method of power battery

A power battery and protection device technology, which is applied in the field of power systems, can solve the problems of short board effect of battery packs and performance decline of single batteries

Inactive Publication Date: 2010-06-09
李光明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that there is an environmental temperature difference between the single cells during the charge and discharge process of the power battery, the efficiency of the single battery is reduced and the entire battery pack forms a short board effect. The present invention provides a power battery protection device and a protection device. The system and protection method are used to balance the ambient temperature of each single battery in the battery pack, avoid the problem of the performance drop of the single battery caused by the temperature difference, and prevent the occurrence of the short board effect

Method used

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  • Protective device, protective device system and protective method of power battery
  • Protective device, protective device system and protective method of power battery
  • Protective device, protective device system and protective method of power battery

Examples

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Embodiment 1

[0047] Such as figure 1 Shown is an embodiment of a power battery protection device of the present invention. The power battery protection device 100 includes a battery box housing 101 , ethylene glycol 104 and a water pump 106 . The battery pack 105 is placed inside the ethylene glycol 104 in the battery box casing 101, and the water pump 106 performs forced circulation to the ethylene glycol 104 in the battery box casing 101, so that each single cell of the battery pack 105 is at an equilibrium temperature. In the environment, the occurrence of single battery problems is avoided, the short board effect is prevented, and the service life of the battery is prolonged. In addition, the liquid-sealed battery pack 105 is isolated from oxygen, which also avoids the occurrence of fire. The air conditioner condensation pipe 103 passes through the battery case housing 101 and contacts the ethylene glycol 104 in the battery case case. When the external high temperature vehicle air co...

Embodiment 2

[0051] Such as figure 2 As shown, it is an embodiment of a power battery protection device system of the present invention. The power battery in this embodiment includes two groups of battery groups 205 and 205' ( figure 2 The connection lines between the battery groups are not shown in the figure), correspondingly, the battery protection device system 200 includes two battery boxes connected in series, and two sets of battery groups 205 and 205' are respectively placed in the two battery boxes. Same as in Embodiment 1, the outer surface of the battery box casing 201 (201') is coated with a fireproof insulation layer 202 (202'), and the battery box casing 201 (201') is loaded with ethylene glycol 204. However, in this embodiment, the two battery case casings 201 and 201' communicate through two liquid passages 207 and 207', so that the ethylene glycol 204 in the battery case casing 201 and the ethylene glycol in the battery case casing 201' Alcohol 204 is connected. The li...

Embodiment 3

[0054] Such as image 3 Shown is another embodiment of a power battery protection device of the present invention. The power battery protection device 300 includes a battery box inner shell 301, a battery box outer shell 302, ethylene glycol 304, a liquid tank 307, a liquid pipeline 308 (308') and a circulating water pump 306. The inner shell 301 of the battery box is made of metal material, such as aluminum and stainless steel, and is used to shield the electromagnetic radiation of the battery pack 305; the outer shell 302 of the battery box is made of a fire-proof and heat-insulating material, such as a high-silica glass fiber composite material, of course it can also be Other fire-proof and heat-preserving materials are used to block the external temperature and avoid the impact of the environment of the vehicle on the ethylene glycol 304 and the battery pack 305 inside the power battery protection device, and also have a fire-proof effect. An airtight space is formed betw...

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Abstract

The invention provides a protective device of a power battery, which solves the problem that the whole battery pack forms a short-board effect because the environmental temperature difference between single batteries causes the effectiveness reduction of single batteries in the process of charging and discharging a battery pack of the power battery in the prior art. The protective device comprises a closed battery box inside which a liquid is contained, wherein the battery pack is immersed into the liquid inside the battery box. The invention also provides a protective method of the power battery, comprising the step of immersing the battery pack of the power battery into the liquid. The protective device or the protective method can equalize the environmental temperature of all single batteries in the battery pack, avoid the problem of the single batteries, prevent the short-board effect, prolong the service life of the batteries and also achieve the effect of fire prevention because of the liquid sealability of the liquid.

Description

technical field [0001] The invention relates to a power system of an electric vehicle or a hybrid electric vehicle, in particular to a protection device for a power battery, a protection device system and a protection method. Background technique [0002] The power battery system of an electric vehicle or a hybrid electric vehicle is a group of battery packs. The balance of the battery pack is a common worldwide problem. During the charging and discharging process, there is a problem with the single battery, such as the failure to charge and discharge normally. Cause the short board effect of the whole battery pack, and vicious circle. There are many reasons for this, including reasons in the production process, raw materials and use processes. In response to this problem, there are various charging and discharging real-time management systems in the industry at present, which are used to find out the single battery with problems, and repair or replace them to ensure the no...

Claims

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Application Information

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IPC IPC(8): H01M10/50H01M2/02H01M2/10B60K1/04H01M10/617H01M10/625H01M10/6567H01M50/224H01M50/244H01M50/249
CPCY02E60/12Y02E60/10
Inventor 李光明
Owner 李光明
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