KR101660443B1 - Device for detecting inner pressure of secondary battery, and method for detecting inner pressure of secondary battery by using the same - Google Patents

Abstract

The present invention discloses an apparatus for measuring internal pressure of a secondary battery and a method for measuring an internal pressure of a secondary battery using the same, by simulating the state of the secondary battery included in the battery pack. An apparatus for measuring internal pressure of a secondary battery according to the present invention includes: a lower heat dissipating plate contacting a surface of a secondary battery to load the secondary battery; An upper heat sink contacting the other surface of the loaded secondary battery to cover the secondary battery; A lower heating plate contacting the lower heat sink and including a heating portion; An upper heating plate contacting the upper heat sink and including a heating portion; And a pressure sensor contacting the lower portion of the lower heating plate. According to the present invention, the secondary battery included in the battery pack can simulate various influences due to the heat generated by the adjacent secondary battery depending on the position of the secondary battery.

Description

TECHNICAL FIELD [0001] The present invention relates to an internal pressure measuring device for a secondary battery, and a method for measuring an internal pressure of the secondary battery using the same. BACKGROUND OF THE INVENTION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring internal pressure of a secondary battery and a method for measuring an internal pressure of the secondary battery using the same, and more particularly, And a method of measuring internal pressure of a secondary battery to be used.

Recently, interest in energy storage technology is increasing. As the application fields of cell phones, camcorders, laptops and even electric vehicles are expanded, efforts for research and development of electrochemical devices are becoming more and more specified. The electrochemical device is one of the most remarkable fields in this respect, and the development of a rechargeable secondary battery has become a focus of attention.

Among the currently applied secondary batteries, the lithium secondary batteries developed in the early 1990's are attracting attention because they have higher operating voltage and higher energy density than conventional batteries such as Ni-MH.

One of the main tasks of the lithium secondary battery is to improve the safety of the lithium secondary battery. The lithium secondary battery has various problems that threaten the safety of the secondary battery such as internal short circuit due to external shock, overheating due to overcharge, overheating, degradation of the electrolyte due to the external shock, and thermal runaway phenomenon.

Particularly, the explosion of the secondary battery is caused by various reasons, but the increase of the gas pressure inside the secondary battery due to the decomposition of the electrolyte is also one cause. Specifically, in a secondary battery, a swelling phenomenon occurs in an abnormal state such as overcharge, overdischarge, short circuit, and overcurrent. In this case, the degree of swelling can not be accurately detected in real time. Here, the swelling phenomenon of the secondary battery refers to a phenomenon in which the internal pressure of the secondary battery, for example, a cell is rapidly increased, so that the outside of the battery, for example, the external battery case, swells up. Such a swelling phenomenon may occur mainly due to generation of gas in the secondary battery, such as generation of gas due to heat generation or ignition of the electrode of the secondary battery, or generation of gas due to decomposition of the electrolyte due to overvoltage.

Such a swelling phenomenon of the secondary battery can cause the explosion of the secondary battery, which not only destroys the pack of the secondary battery and the other device (s) to which the pack is attached, but also seriously damages the persons living there . Further, due to the breakage of the external battery case of the secondary battery, the electrolyte may leak out from the inside of the secondary battery and cause additional damage such as short-circuit, electric shock and fire. Particularly, when a high voltage battery is used such as a hybrid vehicle or an electric vehicle, such a damage situation may occur more seriously.

In order to solve the safety problem of the secondary battery as described above, it is required to measure the internal pressure of the secondary battery during charging and discharging of the secondary battery, and to manufacture an external battery case capable of sufficiently holding the internal pressure. Korean Patent Laid- 2010-0088927 discloses a method of measuring the internal pressure of a secondary battery by inserting a pressure sensor into an external battery case of a secondary battery to measure a pressure. However, the above-described technique has a great limitation in accurate pressure measurement because leakage of gas, leakage of electrolyte, change of internal space due to installation of pressure sensor, and the like may occur in the process of drilling holes for pressure measurement. In addition, in order to accurately measure the pressure that changes with repetitive charging and discharging, the deformation of the external battery case must be minimized. However, as in the above-described technique, there is a problem that accurate measurement of pressure can not be performed because a destructive measurement method of puncturing an external battery case causes deformation of the external battery case. Accordingly, there is a need for an apparatus and method for accurately measuring the internal pressure of a secondary battery without destroying the external battery case of the secondary battery.

Further, as the secondary battery is deformed due to its abnormal state, the portion of the measuring device in contact with the secondary battery is difficult to be parallel to the entire shape of the portion contacting with the secondary battery, and the continuous internal pressure There is a problem that it is difficult to measure the change of

In recent years, a plurality of secondary batteries are connected in series or in parallel to constitute a battery pack. Therefore, the secondary battery included in the battery pack is affected by the heat generation of the adjacent secondary battery. Accordingly, there is a need for an apparatus and method that can measure the pressure of a secondary battery at various temperatures by simulating the state of the secondary battery included in the battery pack.

Disclosure of the Invention The present invention has been made in recognition of the above-described prior art, and it is an object of the present invention to provide an apparatus for measuring internal pressure of a secondary battery and a method for measuring internal pressure of a secondary battery using the same, .

According to an aspect of the present invention, there is provided an apparatus for measuring internal pressure of a secondary battery, the apparatus comprising: a lower heat dissipating plate contacting the one surface of the secondary battery to load the secondary battery; An upper heat sink contacting the other surface of the loaded secondary battery to cover the secondary battery; A lower heating plate contacting the lower heat sink and including a heating portion; An upper heating plate contacting the upper heat sink and including a heating portion; And a pressure sensor contacting the lower portion of the lower heating plate.

According to an embodiment of the present invention, the heating unit included in the upper heating plate and the heating unit included in the lower heating plate are two or more heating wires, respectively.

Preferably, two or more heat lines included in the upper heating plate and two or more heat lines included in the lower heating plate are disposed symmetrically with respect to a plane center of the upper heating plate and the lower heating plate, respectively.

More preferably, the two or more heat wires included in the upper heating plate and the two or more heat wires included in the lower heating plate are disposed at mutually opposite positions.

The internal pressure measuring device of the present invention further includes a spring connected to the upper heating plate to connect the upper heating plate and the lower heating plate to each other to transmit an elastic force in a direction perpendicular to the surface.

Preferably, the number of the springs is three or more.

More preferably, the spring is disposed symmetrically with respect to the plane center of the upper heating plate.

According to an embodiment of the present invention, the upper heat radiating plate and the lower heat sink have a width equal to or greater than the width of the secondary battery in contact therewith.

According to an embodiment of the present invention, the upper heat generating plate and the lower heat generating plate have the same or larger width than the upper heat radiating plate and the lower heat radiating plate which are in contact with the upper heat generating plate and the lower heat generating plate.

The apparatus for measuring internal pressure of a secondary battery according to the present invention may further comprise pressure display means for displaying a value output from the pressure sensor.

The apparatus for measuring internal pressure of a secondary battery according to the present invention may further include a temperature correction sensor connected to the upper heating plate or the lower heating plate. In this case, the apparatus for measuring an internal pressure of a secondary battery according to the present invention may further comprise temperature display means for displaying a value output from the temperature correction sensor. Also, an apparatus for measuring internal pressure of a secondary battery according to the present invention includes: a power supply for supplying power to the heat generating unit; A memory unit for storing a temperature setting profile; And a control unit for comparing the value output from the temperature correction sensor with a temperature setting profile stored in the memory unit and controlling power supplied from the power supply unit.

According to an embodiment of the present invention, the upper heat radiating plate and the lower heat radiating plate are formed with temperature sensor inserting holes for measuring the temperature of the secondary battery.

Preferably, two or more temperature sensor ports are formed.

The apparatus for measuring internal pressure of a secondary battery according to the present invention may further include temperature display means for displaying a value output from a temperature sensor inserted in the temperature sensor insertion port. In this case, the apparatus for measuring internal pressure of a secondary battery according to the present invention includes: a power supply for supplying power to the heat generating unit; A memory unit for storing a temperature setting profile; And a control unit for comparing a value output from the temperature sensor inserted in the temperature sensor insertion port with a temperature setting profile stored in the memory unit and controlling power supplied from the power supply unit.

According to another aspect of the present invention, there is provided a method of measuring an internal pressure of a secondary battery, the method including measuring an internal pressure of a secondary battery, including an upper and a lower heating plate including a heat generating unit, upper and lower heat sinks interposed between the upper and lower heating plates, A method of measuring an internal pressure of a secondary battery using an apparatus including a controller for controlling a power supply for supplying power to a heat generating unit, the method comprising: (a) loading a secondary battery between the upper and lower heat sinks; (b) fixing the upper and lower heating plates so as to face each other; (c) controlling power supplied from the power supply unit to the heating unit through the control unit; And (d) controlling charge / discharge of the secondary battery.

The method of measuring internal pressure of a secondary battery according to the present invention further includes a memory unit for storing a temperature setting profile, wherein a temperature correction sensor is connected to the upper and lower heating plates, and the step (c) And comparing the value output from the sensor with a temperature setting profile stored in the memory unit to control power supplied from the power supply.

The method for measuring internal pressure of a secondary battery according to the present invention may further include a memory unit for storing a temperature setting profile, wherein the upper and lower heat sinks are provided with a temperature sensor inlet, And comparing the value output from the temperature sensor inserted in the insertion port with the temperature setting profile stored in the memory unit to control power supplied from the power supply.

The method of measuring internal pressure of a secondary battery according to the present invention may further include: (e) displaying a value output from the pressure sensor.

According to an embodiment of the present invention, the step (e) represents a value obtained by subtracting the pressure value (initial pressure value) output immediately after the step (b) from the value output from the pressure sensor.

According to the present invention, the secondary battery included in the battery pack can simulate various influences due to the heat generated by the adjacent secondary battery depending on the position in the battery pack.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention, And should not be construed as limiting.
1 is a front view showing a configuration of an apparatus 100 for measuring internal pressure of a secondary battery according to an embodiment of the present invention.
2 is an exploded perspective view showing a configuration of an apparatus 100 for measuring internal pressure of a secondary battery according to an embodiment of the present invention.
FIG. 3 is a block diagram schematically illustrating a configuration according to an embodiment of the present invention.
FIG. 4 is a block diagram schematically illustrating a configuration according to another embodiment of the present invention.
5 is a flowchart schematically illustrating a method of measuring an inner pressure of a secondary battery according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a front view showing a configuration of an apparatus 100 for measuring internal pressure of a secondary battery according to an embodiment of the present invention.

2 is an exploded perspective view showing a configuration of an apparatus 100 for measuring internal pressure of a secondary battery according to an embodiment of the present invention.

1 and 2, an apparatus 100 for measuring internal pressure of a secondary battery according to the present invention includes an upper heating plate 110, an upper heat sink 120, a lower heat sink 130, a lower heating plate 140, 150).

Between the upper heat sink 120 and the lower heat sink 130, a secondary battery 200 for measuring an internal pressure is interposed. The lower heat sink 130 is in contact with one surface of the secondary battery to provide a space for loading the secondary battery 200. The upper heat sink 120 is in contact with the other surface of the loaded secondary battery 200 to cover the secondary battery 200.

The upper heat radiating plate 120 and the lower heat radiating plate 130 serve to uniformly transfer the heat generated from the upper heating plate 110 and the lower heating plate 140 to the loaded rechargeable battery 200 do. Accordingly, the upper heat sink 120 and the lower heat sink 130 may be formed by selecting a heat transfer material easily selectable by a person skilled in the art (hereinafter referred to as "the person skilled in the art").

The kind of the secondary battery measured by the internal pressure measuring apparatus 100 according to the present invention is not particularly limited. The secondary battery can be composed of a lithium ion battery, a lithium polymer battery, a nickel-cadmium battery, a nickel-metal hydride battery, a nickel-zinc battery, or the like, which can be recharged and must consider a charging or discharging voltage. The inner pressure measuring apparatus 100 according to the present invention is not particularly limited in the type of the secondary battery to be measured according to the packaging material of the secondary battery, although it can be classified into a pouch type, a square type, and a can type depending on the packaging material of the secondary battery .

The upper heat generating plate 110 is in contact with the upper heat dissipating plate 120. The upper heat generating plate 110 includes a heat generating portion.

The lower heat generating plate (140) is in contact with the lower heat dissipating plate (130). The lower heating plate 140 includes a heat generating portion.

According to an embodiment of the present invention, the heat generating unit included in the upper heat generating plate 110 and the heat generating unit included in the lower heat generating plate 140 are two or more coils 111, 112, 141, and 142, respectively.

Preferably, at least two heat lines 111 and 112 included in the upper heat generating plate 110 and at least two heat lines 141 and 142 included in the lower heat generating plate 140 are formed in the upper heat generating plate 110 and the lower heat generating plate 140, Are arranged symmetrically with respect to the plane center of the magnet (140).

More preferably, two or more heat lines 111 and 112 included in the upper heat generating plate 110 and two or more heat lines 141 and 142 included in the lower heat generating plate 140 are disposed at mutually opposite positions.

In this specification, a heating coil is an example of the heating unit, but the heating unit is a component that generates heat by external energy. Therefore, it should be understood that it includes all the heating means that can be easily replaced by those skilled in the art.

The secondary battery 200 interposed between the lower heat sink 130 and the upper heat sink 120 is charged and discharged. Particularly, charging and discharging are performed so that a swelling phenomenon such as overcharge, overdischarge, short circuit, overcurrent occurs in the secondary battery. The internal pressure of the secondary battery 200 increases due to a swelling phenomenon occurring at this time.

The pressure sensor 150 contacts the lower portion of the lower heating plate 140 to measure a pressure increased due to swelling of the secondary battery 200. The pressure sensor 150 may convert the applied pressure into an electrical signal and output the electrical signal.

The apparatus for measuring internal pressure of a secondary battery 100 according to the present invention may further include a pressure display means 151 for displaying a value output from the pressure sensor 150.

Meanwhile, the internal pressure increased due to swelling of the secondary battery 200 is transmitted in all directions. Therefore, in order to measure the internal pressure more accurately, it is necessary to transmit the increased internal pressure only by the swelling phenomenon of the secondary battery 200 in the downward direction.

The apparatus 100 for measuring internal pressure of a secondary battery according to the present invention is connected to the upper heating plate 110 so as to transmit an elastic force in a direction perpendicular to the surfaces of the upper heating plate 110 and the lower heating plate 140 And may further include a spring 131.

Preferably, the number of the springs 131 is three or more.

More preferably, the spring 131 is disposed symmetrically with respect to the plane center of the upper heating plate 110. The force applied in the downward direction by the spring 131 can be applied uniformly through the arrangement of the spring 131.

The upper heat radiating plate 120 and the lower heat radiating plate 130 may have a width equal to or greater than the width of the secondary battery 200 contacting the upper heat radiating plate 120 and the lower heat radiating plate 130.

The upper heat generating plate 110 and the lower heat generating plate 140 may have a width equal to or larger than the upper heat radiating plate 120 and the lower heat radiating plate 130 which are in contact with the upper heat generating plate 110 and the lower heat generating plate 140.

The apparatus 100 for measuring internal pressure of a secondary battery according to the present invention may further include a temperature correction sensor 114 connected to the upper heating plate 110 or the lower heating plate 140. 1 and 2 show an embodiment in which a temperature correction sensor 114 is connected to the upper heating plate 110. In FIG. The temperature correction sensor 114 measures the temperature of the heating unit (hot wire). The temperature of the heating unit (hot wire) can be adjusted to a desired temperature through the temperature correction sensor 114. The degree of cooling of the secondary battery included in the battery pack differs depending on the position in the battery pack. Therefore, the degree of the secondary battery included in the battery pack may be affected by the heat generated by the adjacent secondary battery depending on the position of the secondary battery included in the battery pack. The temperature of the heating unit (heating wire) can be adjusted to various positions of the secondary battery included in the battery pack, various situations, or various external environments.

The apparatus 100 for measuring internal pressure of a secondary battery according to the present invention may further include temperature display means (not shown) for displaying a value output from the temperature correction sensor 114.

FIG. 3 is a block diagram schematically illustrating a configuration according to an embodiment of the present invention.

Referring to FIG. 3, an apparatus 100 for measuring internal pressure of a secondary battery according to the present invention may further include a power supply 230, a memory unit 210, and a controller 220.

The power supply 230 supplies power to the heating unit (hot wire).

The memory unit 210 stores a temperature setting profile. The temperature setting profile means data in which a temperature value desired by the experimenter is stored. The temperature setting profile may be set to have a temperature value that varies with time.

The control unit 220 compares a value output from the temperature correction sensor 114 with a temperature setting profile stored in the memory unit 210 and compares the power supplied from the power supply unit 230 to the heating unit .

According to an embodiment of the present invention, the upper heat sink 120 and the lower heat sink 130 are formed with temperature sensor ports 122, 123 and 124 for measuring the temperature of the secondary battery 200.

Referring again to FIGS. 1 and 2, it can be seen that grooves 121 and 131 are formed in the upper heat sink 120 and the lower heat sink 130, respectively, in a semicircular shape. The grooves 121 and 131 abut against each other to form temperature sensor insertion ports 122, 123 and 124 for measuring the temperature of the secondary battery 200.

According to an embodiment of the present invention, two or more temperature sensor ports 122, 123 and 124 are formed. In the embodiment shown in FIGS. 1 and 2, a total of three temperature sensor inserting ports 122, 123 and 124 are formed. The three temperature sensor inserting ports 122, 123 and 124 are formed at a position for checking the central portion of the secondary battery 200 and the heating state of the respective electrode tabs. However, the embodiment shown in the drawings does not limit the position and the number of the temperature sensor insertion ports 122, 123, 124 for the present invention.

The apparatus 100 for measuring internal pressure of a secondary battery according to the present invention may further include temperature display means (not shown) for displaying a value output from the temperature sensor 125 inserted in the temperature sensor inlet.

FIG. 4 is a block diagram schematically illustrating a configuration according to another embodiment of the present invention.

Referring to FIG. 4, an apparatus 100 for measuring internal pressure of a secondary battery according to the present invention may further include a power supply 230, a memory unit 210, and a controller 220.

The power supply 230 and the memory unit 210 are the same as the power supply 230 and the memory unit 210 of the embodiment shown in FIG.

3, the control unit 220 receives a value output from the temperature sensor 125 inserted into the temperature sensor insertion ports 122, 123, and 124. [ The value output from the temperature sensor 125 inserted in the temperature sensor insertion ports 122, 123 and 124 is compared with the temperature setting profile stored in the memory unit 210 and the power supplied from the power supply 230 . The actual temperature environment of the secondary battery 200 can be simulated through the above configuration.

Hereinafter, a method for measuring internal pressure of a secondary battery according to the present invention will be described. 1 to 4, but redundant description will be omitted.

5 is a flowchart schematically illustrating a method of measuring an inner pressure of a secondary battery according to an embodiment of the present invention.

Referring to FIG. 5, firstly, in step 10, a secondary battery 200 to be measured for internal pressure is loaded. The secondary battery 200 is loaded between the upper heat sink plate 120 and the lower heat sink plate 130.

In the next step 20, the upper heating plate 110 and the lower heating plate 140 are fixed so as to face each other. As described above, a spring 131 may be connected to the upper heating plate 110 for accurate pressure measurement.

In the next step 30, the control unit 220 controls the power supplied from the power supply unit 230 to the heating unit (hot line). As described above, the power output from the power supply 230 can be controlled by comparing the value output from the temperature correction sensor 114 with the temperature setting profile stored in the memory unit 210 have. The value output from the temperature sensor 125 inserted in the temperature sensor insertion ports 122, 123 and 124 is compared with the temperature setting profile stored in the memory unit 210, (Hot line) can be controlled.

And displays the value output from the pressure sensor 150 in a final step 40. The value displayed in this step may be a value obtained by subtracting the initial pressure value from the value output from the pressure sensor 150. [ The initial pressure value means a value output from the pressure sensor 150 before the secondary battery is charged / discharged. The pressure of the internal pressure measuring apparatus 100 itself of the secondary battery according to the present invention is also measured by the pressure sensor 150. Therefore, in order to display only the internal pressure of the secondary battery 200, the initial pressure value should be limited to a residual value.

According to the present invention, the secondary battery included in the battery pack can simulate various influences due to the heat generated by the adjacent secondary battery depending on the position in the battery pack.

In the meantime, in describing the present invention, it should be understood that each component of the present invention shown in FIG. 3 to FIG. 4 is logically divided into components rather than physically separated components.

That is, since each configuration corresponds to a logical component for realizing the technical idea of the present invention, even if each component is integrated or separated, if the functions performed by the logical configuration of the present invention can be realized, And it is to be understood that any component that performs the same or similar function should be construed as being within the scope of the present invention irrespective of the consistency of the name.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

100: Internal pressure measuring device of a secondary battery
110: upper heating plate
111, 112: heating part (heating wire)
113: spring
114: Temperature compensation sensor
120: upper heat sink
121: Home
122, 123, 124: Temperature sensor inlet
125: Temperature sensor
130: Lower heat sink
131: Home
140: Lower heating plate
141, 142: Heat generating part (hot wire)
150: Pressure sensor
151: Pressure display means
200: secondary battery
210:
220:
230: Power supply

Claims (22)

An apparatus for measuring an internal pressure of a secondary battery in a state in which a secondary battery is included in a battery pack, the apparatus comprising:
A lower heat sink contacting the one surface of the secondary battery and loading the secondary battery;
An upper heat sink contacting the other surface of the loaded secondary battery to cover the secondary battery;
A lower heating plate contacting the lower heat sink and including a heating portion;
An upper heating plate contacting the upper heat sink and including a heating portion;
A pressure sensor in contact with a lower portion of the lower heating plate;
A memory unit for storing a temperature setting profile;
A power supply for supplying power to the heating unit; And
And a control unit for controlling the power supply using a temperature setting profile stored in the memory unit. The method according to claim 1,
Wherein the heating unit included in the upper heating plate and the heating unit included in the lower heating plate are respectively two or more heat lines. 3. The method of claim 2,
Wherein two or more heat lines included in the upper heating plate and two or more heat lines included in the lower heating plate are arranged symmetrically with respect to a plane center of the upper heating plate and the lower heating plate, Device. The method of claim 3,
Wherein the two or more heat wires included in the upper heating plate and the two or more heat wires included in the lower heating plate are disposed at mutually opposite positions. The method according to claim 1,
Further comprising a spring connected to the upper heating plate and connected to transmit an elastic force in a direction perpendicular to a surface of the upper heating plate and the lower heating plate facing each other. 6. The method of claim 5,
Wherein the number of the springs is three or more. The method according to claim 6,
Wherein the spring is disposed symmetrically with respect to a plane center of the upper heating plate. The method according to claim 1,
Wherein the upper heat radiating plate and the lower heat sink have a width equal to or greater than a width of the secondary battery in contact with the upper heat radiating plate and the lower heat radiating plate. The method according to claim 1,
Wherein the upper heat generating plate and the lower heat generating plate have the same or larger width than the upper heat radiating plate and the lower heat radiating plate which are in contact with the upper heat generating plate and the lower heat generating plate. The method according to claim 1,
And pressure display means for displaying a value output from the pressure sensor. The method according to claim 1,
And a temperature correction sensor connected to the upper heating plate or the lower heating plate. 12. The method of claim 11,
And temperature display means for displaying a value output from the temperature correction sensor. 12. The method of claim 11,
Wherein the controller compares a value output from the temperature correction sensor with a temperature setting profile stored in the memory unit to control power supplied from the power supply. The method according to claim 1,
Wherein the upper heat radiating plate and the lower heat radiating plate are provided with a temperature sensor inlet for measuring the temperature of the secondary battery. 15. The method of claim 14,
Wherein at least two of the temperature sensor insertion ports are formed. 15. The method of claim 14,
And temperature display means for displaying a value output from a temperature sensor inserted into the temperature sensor insertion port. 15. The method of claim 14,
Wherein the control unit controls the power supplied from the power supply by comparing the value output from the temperature sensor inserted in the temperature sensor insertion port with the temperature setting profile stored in the memory unit, . A method of measuring an internal pressure of a secondary battery in a state in which a secondary battery is included in a battery pack,
An upper and lower heating plates including a heating part, upper and lower heat sinks interposed between the upper and lower heating plates, a pressure sensor contacting the lower heating plate, a memory part storing a temperature setting profile, a power supply supplying power to the heating part, And a controller for controlling a power supply for supplying power to the heating unit, the method comprising the steps of:
(a) loading the secondary battery between the upper and lower heat sinks;
(b) fixing the upper and lower heating plates so as to face each other;
(c) controlling the power supplied from the power supply unit to the heating unit by using the temperature setting profile stored in the memory unit; And
(d) controlling the charging and discharging of the secondary battery. 19. The method of claim 18,
A temperature correction sensor is connected to the upper and lower heating plates,
Wherein the step (c) includes the step of comparing the value output from the temperature correction sensor with a temperature setting profile stored in the memory unit to control power supplied from the power supply, Way. 19. The method of claim 18,
The upper and lower heat sinks are formed with temperature sensor ports,
Wherein the step (c) includes the step of comparing the value output from the temperature sensor inserted in the temperature sensor insertion port with the temperature setting profile stored in the memory unit, and controlling power supplied from the power supply unit A method for measuring internal pressure of a battery. 19. The method of claim 18,
(e) displaying a value output from the pressure sensor. 22. The method of claim 21,
Wherein the step (e) displays a value obtained by subtracting the pressure value (initial pressure value) output immediately after the step (b) from the value output from the pressure sensor.

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