Explosion pressure prediction system for medium- and large-size cell module, and method for predicting explosion pressure of medium- and large-size cell module

1. A method for predicting an explosion pressure of a medium-large cell module, the method comprising:

deriving a SOC-temperature profile of a generated temperature according to a charge amount (SOC) of the medium-large cell module (S 100 );

mounting a small cell inside an explosion pressure measuring device (S 200 );

heating the small cell in a same manner as the SOC-temperature profile and overcharging the small cell until the small cell is exploded (S 300 );

measuring a pressure when the small cell is exploded (S 400 ); and

converting the measured pressure of the small cell into an explosion pressure of the medium-large cell module (S 500 ).

2. The method of claim 1 , wherein in the converting the measured pressure (S 500 ), a pressure of the medium-large cell module is calculated by substituting the pressure measured at the explosion of the small cell with an equation,

P

md

=

P

s

×

C

ml

C

s

×

N

m

⁢

d

[

Equation

]

wherein in the above equation, P md is the explosion pressure of the medium-large cell module, P s is the pressure when the small cell is exploded, C ml is a capacity of the medium-large cell, C s is a capacity of the small cell, and N md is a number of cells of the medium-large cell module.

3. The method of claim 1 , wherein in the deriving the SOC-temperature profile (S 100 ), the SOC-temperature profile is different by capacities of the medium-large cell module.

4. The method of claim 1 , wherein the small cell has a capacity of 1.0 Ah or less.

5. The method of claim 1 , wherein the medium-large cell module includes one or more medium-large cells having a capacity of 20 Ah or more, which are electrically connected to each other.

6. The method of claim 1 , wherein in the overcharging the small cell (S 300 ), a charging current is applied and at the same time, a voltage of the small cell is measured concurrently.

7. The method of claim 1 , wherein the medium-large cell module is a power source of an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a power storage device.

8. A system for predicting an explosion pressure of a medium-large cell module, the system comprising:

a chamber having a heating member disposed therein and including a mounting portion for mounting a small cell on the heating member;

a temperature control unit connected to the heating member to adjust a temperature of the heating member;

a charge/discharge unit electrically connected to the small cell;

a pressure measuring sensor located on one side of the chamber; and

a controller configured to control the temperature control unit, the charge/discharge unit, and the pressure measuring sensor;

wherein the controller controls the charge/discharge unit and the temperature control unit in order to heat the small cell in a same manner as a SOC-temperature profile of the medium-large cell module.

9. The system of claim 8 , wherein the heating member includes a first heating plate and a second heating plate, and

wherein a mounting portion is provided between the first heating plate and the second heating plate.

10. The system of claim 8 , wherein the chamber has a through portion formed at the one side, and is connected to the pressure measuring sensor through the through portion.

11. The system of claim 8 , wherein the chamber includes: a chamber body having a hollow structure with an open top; and a chamber cover coupled with the open top of the chamber body to seal the mounted small cell.

12. The system of claim 8 , further comprising an output unit configured to convert a pressure of the small cell measured by the pressure measuring sensor to a pressure of the medium-large cell module.