KR-20260063420-A - Apparatus of testing secondary battery

KR20260063420AKR 20260063420 AKR20260063420 AKR 20260063420AKR-20260063420-A

Abstract

The present invention relates to a test apparatus for a secondary battery. A test apparatus for a secondary battery according to one aspect of the present invention is a test apparatus for a secondary battery capable of applying thermal energy to the secondary battery to verify the thermal characteristics of the secondary battery, and comprises: a heater that can be disposed on the outer surface of the secondary battery; and a temperature sensor for measuring the temperature of the heater. The heater may include: a heater body made of a conductive material capable of converting electrical energy into thermal energy; an insulating layer provided on the outer surface of the heater body; and a metal layer provided on the outer surface of the insulating layer and to which the temperature sensor is coupled.

Inventors

채영철
김상진
조재윤
김대형
김형석

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (13)

A test device for a secondary battery capable of applying thermal energy to the secondary battery to verify the thermal characteristics of the secondary battery, A heater that can be disposed on the outer surface of a secondary battery; and It includes a temperature sensor for measuring the temperature of the heater, and The above heater is, A heater body made of a conductive material to convert electrical energy into thermal energy; An insulating layer provided on the outer surface of the heater body; and A test device for a secondary battery comprising a metal layer provided on the outer surface of the insulating layer and to which the temperature sensor is coupled.
In Article 1, The above temperature sensor is a test device for a secondary battery, welded to the metal layer.
In Article 2, The above temperature sensor is, First metal part; Second metal part; and A test device for a secondary battery, comprising a connecting portion connecting one side of the first metal portion and one side of the second metal portion.
In Paragraph 3, The above connection is welded to the metal layer, and A test device for a secondary battery, wherein the first and second metal parts are positioned at a predetermined distance from the metal layer.
In Paragraph 3, The above first and second metal parts are metal wires, forming a test device for a secondary battery.
In Paragraph 3, The above-mentioned connecting portion has a convex shape on the outer side of the metal layer, for a secondary battery test device.
In Article 6, A test device for a secondary battery, wherein at least a portion of the above-mentioned connecting member has a hemispherical shape.
In Paragraph 3, A test device for a secondary battery, wherein the first metal part is made of a different material from the second metal part.
In Article 1, The above insulating layer is made of ceramic, a test device for a secondary battery.
In Article 1, The above heater body is a test device for a secondary battery, made of an alloy containing nickel (Ni) and chromium (Cr).
In Article 1, The above metal layer is made of aluminum (Al), a test device for a secondary battery.
In Article 1, A test device for a secondary battery comprising a controller that controls the operation of the heater based on information obtained by the temperature sensor.
In Article 1, The outer surface of the above insulating layer is, A cover area provided with the above metal layer; and A test device for a secondary battery, comprising an exposed area exposed to the outside.

Description

Apparatus of testing secondary battery The present invention relates to a test apparatus for a secondary battery, and more specifically, to a test apparatus for a secondary battery for verifying the thermal characteristics of a secondary battery. Although secondary batteries have been applied to small-scale fields such as mobile devices and laptop computers, recently the direction of research has expanded to medium and large-scale fields, and they are widely used in fields requiring high voltage and large capacity, such as Energy Storage Systems (ESS) and Electric Vehicles (EV). Meanwhile, as secondary batteries are utilized in various devices, the demand for their stability is increasing. Recently, international standards for testing the thermal characteristics of secondary batteries related to thermal propagation phenomena are being discussed. An example of this is the standard test condition for localized rapid eternal heating. To perform such a test, a test device consisting of a heater installed on the outer surface of a secondary battery and a sensor for measuring the temperature of the heater may be used. However, since this test device requires the heater and the sensor to be combined or assembled, it has low usability and there is a problem in that the accuracy of the test varies depending on the operator's skill level or installation precision. This can become an even greater problem when testing cylindrical secondary batteries with curved outer surfaces. FIG. 1 is a schematic diagram showing a test apparatus for a secondary battery according to one embodiment of the present invention. FIG. 2 is a top-view perspective of the heater and temperature sensor shown in FIG. 1 installed on the outside of the secondary battery. In this case, the secondary battery is indicated by a dotted line. Figure 3 is an enlarged view of a portion of the cross-section according to II of Figure 2. Preferred embodiments of the present invention are described in detail so that those skilled in the knowledge can easily implement them. However, the present invention may be embodied in various different forms and is not limited or restricted by the following embodiments. In order to clearly explain the present invention, detailed descriptions of related prior art that are irrelevant to the explanation or that may unnecessarily obscure the essence of the invention have been omitted. Furthermore, when assigning reference numerals to the components of each drawing in this specification, identical or similar reference numerals are assigned to identical or similar components throughout the entire specification. In addition, terms or words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. FIG. 1 is a schematic diagram showing a test apparatus for a secondary battery according to an embodiment of the present invention. FIG. 2 is a top-view perspective of the state in which the heater and temperature sensor shown in FIG. 1 are installed on the outside of the secondary battery. In this case, the secondary battery is indicated by a dotted line. FIG. 3 is an enlarged view of a portion of the cross-section along I-I in FIG. 2. FIGS. 1 to 3 disclose a test apparatus for a secondary battery (hereinafter referred to as the test apparatus) according to an embodiment of the present invention. Referring to FIG. 1, the test apparatus (1) according to an embodiment of the present invention may be a device for verifying the thermal characteristics of a secondary battery (B). For example, the test device (1) may be a device for checking whether the secondary battery (B) undergoes deformation, changes in temperature or pressure, gas emission, or explosion by applying a predetermined amount of thermal energy to the secondary battery (B), but the thermal characteristics that the test device (1) can check are not limited to those described above. Meanwhile, the secondary battery (B) may be a cylindrical secondary battery, but the type or structure of the secondary battery to which the test device (1) is applied is not particularly limited. Referring to FIGS. 1 to 3, a test device (1) according to one embodiment of the present invention may include a heater (10). The heater (10) may be configured to apply thermal energy to a secondary battery (B). To this end, the heater (10) may be configured to be placed on the outer surface of the secondary battery (B). The heater (10) may be a heating device that converts supplied electrical energy into thermal energy. Although not illustrated, the heater (10) may be fixed to the outer surface of the secondary battery (B) by a predetermined fixing member. The fixing member may be a tape, etc. A heater (10) of a test