KR20200069758A - Battery charge-discharge cycle test after battery crush test apparatus and method - Google Patents

Abstract

An embodiment of the present invention provides an apparatus for a battery charge-discharge cycle test after a battery impact test, comprising: a chamber formed to test a battery under a set temperature; a battery impact test unit positioned within the chamber and including a battery base unit formed to position the battery on a plane and a battery pressing unit formed to press the battery with a set pressure and to apply an impact to the battery; a temperature measurement unit including a chamber inside temperature measurement sensor which can measure the temperature inside the chamber in order to check the set temperature and a battery temperature measurement sensor which can measure a temperature change of the battery; a voltage measurement unit for measuring voltage of the battery; a data collection unit connected to the temperature measurement unit and the voltage measurement unit to collect and display the measured values; and a battery charge-discharge cycle test unit performing charge-discharge cycles as many as the set number wherein, in the charge-discharge cycle, charging and discharging the pressed battery are repeated, and accordingly performing the test for outputting a battery capacity measurement result.

Description

Charging and discharging cycle test device and method after battery shock test {BATTERY CHARGE-DISCHARGE CYCLE TEST AFTER BATTERY CRUSH TEST APPARATUS AND METHOD}

The present invention relates to an apparatus and method for testing and discharging cycles after a battery shock test capable of performing a battery charge/discharge cycle test after the battery has been subjected to an impact that can be received in real life.

2. Description of the Related Art As the development and research of batteries continues in the 2000s, the spread of portable devices such as smartphones, notebooks, and tablet PCs in which batteries are used as an energy source is increasing.

In particular, lithium-ion batteries are secondary batteries that can be reused repeatedly through charging and discharging, and are mainly used as power sources for mobile devices and electric vehicles because they can obtain high voltage and high current density. As described above, a lithium ion battery is an efficient energy source of high energy and high density, but due to such characteristics, there is a risk of ignition and explosion.

In the real life, if the device to which the battery is applied is strongly pressurized and the consumer continues to use charge and discharge repeatedly without being ignited, perforation of the separator inside the battery that may occur after the impact, separation of the membrane shrinkage, electrode crack, electrode The battery may ignite due to tally. Therefore, it is necessary to check the safety through a charge/discharge cycle test even after a routine shock is applied to the battery.

Japanese Registered Patent No. 464244 (Nov. 26, 2010)

Embodiments of the present invention provide a charging and discharging cycle test device and method after the battery shock test that can grasp the safety of the battery when the battery is continuously charged and discharged and used after the battery receives a certain shock in the device using the battery .

An embodiment of the present invention, a chamber formed to test the battery under a set temperature, located in the chamber, press the battery base and the battery formed to be located on the plane to a predetermined pressure to apply an impact A battery impact test unit including a battery pressurization unit formed to enable, a chamber temperature measurement sensor to measure the temperature inside the chamber to check the set temperature, and a battery temperature measurement sensor to measure the temperature change of the battery Temperature measurement unit, a voltage measurement unit for measuring the voltage of the battery, the temperature measurement unit and connected to the voltage measurement unit to collect the measured value, display and display the data collection unit and charging and discharging the pressurized battery It is possible to provide a charge/discharge cycle test apparatus after a battery shock test including a battery charge/discharge cycle test unit that performs a test for calculating a battery capacity measurement result according to a predetermined number of repetitive charge/discharge cycles.

At this time, the battery charge/discharge cycle test unit calculates and displays a charging unit for charging the pressurized battery, a discharge unit for supplying and discharging the pressurized battery, and a set number of charge/discharge cycles and a battery capacity measurement result accordingly. It may include a display.

At this time, the set temperature may be in the range of 15 °C to 25 °C.

At this time, the pressure set to pressurize the battery may be in the range of 12KN to 14KN.

At this time, the set number of charge/discharge cycles may be 100 or more times.

In one embodiment of the present invention, the interior of the chamber is set to a temperature within the range of 15°C to 25°C to prepare a battery shock test unit and a battery charge/discharge cycle test unit therein. Placing the battery on a flat surface, and performing a charging and discharging cycle that repeats charging and discharging the pressurized battery at least 100 times in a pressurizing step of applying a shock to the battery by pressing the battery pressurizing part at a set pressure. Accordingly, it is possible to provide a charging and discharging cycle test method after a battery shock test including the step of performing a charging and discharging cycle test for calculating the battery capacity measurement result accordingly.

At this time, the pressure set to pressurize the battery may be in the range of 12KN to 14KN.

Other aspects, features and advantages other than those described above will become apparent from the following drawings, claims and description of the invention.

After the battery shock test according to an embodiment of the present invention, a charging and discharging cycle test apparatus and method, in reality, when a device using a battery in real life is shocked and the battery is strongly shocked, the battery is continuously ignited. When used, the safety of the battery can be checked.

1 is a block diagram showing a charge/discharge cycle test apparatus after a battery shock test according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram schematically showing a battery shock test unit of FIG. 1.
3 is a flowchart illustrating a method for testing a charge/discharge cycle after a battery shock test of a battery according to an embodiment of the present invention.

The present invention can be applied to a variety of transformations and may have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention and methods for achieving them will be clarified with reference to embodiments described below in detail with reference to the drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the drawings, identical or corresponding components will be denoted by the same reference numerals and redundant description thereof will be omitted. .

In the following examples, terms such as first and second are not used in a limited sense, but for the purpose of distinguishing one component from other components.

In the following embodiments, the singular expression includes the plural expression unless the context clearly indicates otherwise.

In the examples below, terms such as include or have are meant to mean the presence of features or components described in the specification, and do not preclude the possibility of adding one or more other features or components in advance.

In the following embodiments, when a part of a film, region, component, etc. is said to be on or on another part, as well as when it is directly above the other part, other films, regions, components, etc. are intervened Also included.

In the drawings, the size of components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to what is shown.

When an embodiment can be implemented differently, a specific process order may be performed differently from the described order. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to that described.

In the following embodiments, when a membrane, region, component, etc. is connected, other membranes, regions, components are interposed in the middle of the membrane, region, components, as well as when the membranes, regions, components are directly connected. It is also included indirectly. For example, in the present specification, when a membrane, region, component, etc. is electrically connected, not only is the membrane, region, component, etc. directly electrically connected, but other membranes, regions, components, etc. are interposed therebetween. Also includes indirect electrical connection.

Hereinafter, with reference to FIGS. 1 and 2, the charging and discharging cycle test apparatus 10 will be described after a battery shock test according to an embodiment of the present invention.

1 is a block diagram showing an apparatus for testing a charge/discharge cycle after a battery shock test according to an embodiment of the present invention, and FIG. 2 is a schematic diagram schematically showing a battery shock test unit of FIG. 1.

1 to 2, after the battery shock test according to an embodiment of the present invention, the charge/discharge cycle test apparatus 10 includes a chamber 100, a battery shock test unit 300, a temperature measurement unit 400, It may include a voltage measuring unit 500, a data collection unit 600, a battery charge and discharge cycle test unit 700.

The chamber 100 may be formed to test the battery 200 under a set temperature. The shape of the chamber 100 is not limited, and may be formed to an appropriate size to perform a test on the battery 200 under a set temperature. The chamber 100 may be made of a material and a structure that secures durability so as to protect a user's safety and minimize risk in preparation for a heat and explosion accident that may occur inside.

The battery 200 is not limited to a specific shape such as a square shape, a cylindrical shape, or a pouch shape, and may have any shape. Testing may be performed using a battery 200 of a type that is a target of an applied device. At this time, the battery 200 may be one or a plurality.

The battery impact test unit 300 may include a battery base unit 310 and a battery pressing unit 330. The battery base 310 is located in the chamber 100 and is formed to be able to position the battery 200 on a plane. The shape of the battery base 310 is not limited, and any shape is possible as long as the battery 200 cannot move in a static state. The battery impact unit 330 may apply an impact by pressing the battery 200 positioned on the plane of the battery base unit 310 at a set pressure. At this time, the battery base portion 310 and the battery pressing portion 330 are in contact with each other to form a plane with each other, the battery 200 can be placed on the plane of the battery base portion 310 to operate the battery pressing portion 330. have. On the other hand, by placing the battery 200 on the plane of the battery base part 310, the battery pressing part 330 is operated so that the battery pressing part 330 can apply an impact so that the overall shape of the battery 200 is deformed. I can do it. In addition, the battery pressurization unit 330 may be operated by placing the battery 200 on a plane of the battery base unit 310 such that an impact is applied to some shapes of the battery 200. The battery pressing unit 330 is configured of, for example, a hydraulic ram, and may impact the battery 200 through a piston action using fluid pressure. However, the battery pressurizing portion 330 is not necessarily limited to the hydraulic ram, and can be anything as long as it can impact the battery 200 on the battery base 310.

The pressure set to pressurize the battery 200 is preferably a pressure corresponding to 13KN±1KN (3000lbs±224lbs). That is, the pressure set in order to pressurize the battery 200 is set within a range of 12KN to 14KN, so that the battery 200 must be pressurized to prevent ignition or explosion. This is because in the real life, even after the battery 200 is pressurized, leakage, explosion, or ignition of the battery 200 is not observed, and it is necessary to check the safety of the battery when the battery 200 can be continuously used.

The temperature measurement unit 400 may include a temperature measurement sensor and a battery temperature measurement sensor inside the chamber. The temperature measurement sensor inside the chamber can measure the temperature inside the chamber to confirm the set temperature. The chamber temperature measurement sensor may check whether the temperature inside the chamber 100 corresponds to a set temperature and whether to maintain the set temperature over time. The battery temperature measurement sensor may measure temperature changes over time of the battery 200 to check the state changes before and after receiving the pressing force. When attaching the battery temperature sensor to the surface of the battery 200, a polycarbonate film is used to prevent damage to the surface. In addition, the temperature change after the charge/discharge cycle test is performed by the battery charge/discharge cycle test unit 700 may be measured.

The voltage measuring unit 500 may measure voltage changes over time of the battery 200 respectively, and may measure changes in voltage of the battery 200 before and after receiving a pressing force. In addition, the battery 200 may measure a state of change in voltage after the battery charge/discharge cycle test unit 700 performs a charge/discharge cycle test.

The data collection unit 600 may be connected to the temperature measurement unit 400 and the voltage measurement unit 500 to collect and display measured values. Temperature and voltage measurements of the battery 200 may be collected and displayed at set time intervals.

The battery charge/discharge cycle test unit 700 may perform a test for calculating a battery capacity measurement result according to a predetermined number of charge/discharge cycles that repeat charging and discharging on the pressurized battery 200. The battery charge/discharge cycle test unit 700 may include a charging unit, a discharging unit, and a display unit. The charging unit may charge the pressurized battery 200, and the discharge unit may supply and discharge a current to the pressurized battery 200. The display unit may calculate and display the set number of charge/discharge cycles and the measured battery capacity measurement result accordingly. The set number of charge/discharge cycles is preferably 100 or more.

For example, in the case of the charging/discharging cycle test using the constant current test method, a constant current is applied to the battery 200 to measure a change in voltage over time of the battery over time to check characteristics. When the battery 200 is a lithium ion battery, the voltage of the battery 200 increases in the case of charging, and the voltage of the battery 200 decreases in the case of discharge. Typically, the charging voltage uses a voltage of 4.3 V or less for electrolyte decomposition and electrode material safety, and in the case of discharge voltage, measures up to 3 V for discharge voltage to prevent damage to the electrode material due to over-discharge. do. In this way, the battery 200 performs a cycle process of repeating charging and discharging within a range representing a specific voltage, thereby calculating a capacity measurement result of the battery and performing a test.

Meanwhile, after the battery shock test, the charge/discharge cycle test apparatus 10 may further include an air filter unit capable of discharging toxic gases or the like, as there may be a possibility of ignition or explosion in the process of testing the battery 200. have.

Figure 3 is a flow chart showing the battery charging and discharging cycle test method step by step after the battery shock test according to an embodiment of the present invention.

Hereinafter, a charging and discharging cycle test method after a battery shock test according to an embodiment of the present invention will be described with reference to FIG. 3.

Step S100 is a preparation step of installing the battery shock test unit 300 and the battery charge/discharge cycle test unit 400 therein by setting the inside of the chamber 200 to a temperature within a range of 15°C to 25°C.

The step S200 is a pressing step of placing the battery 200 on the plane of the battery base unit 310 in the battery impact test unit 300 and applying pressure to the battery 200 by pressing the battery pressing unit 330 to a set pressure. to be. At this time, the set pressure is preferably a value between 12KN to 14KN. When the battery 200 is pressurized by the battery pressurizing unit 330, leakage may not occur in the battery or ignition or explosion may not occur, so that a subsequent step may be performed. In the real life, even after the battery 200 is pressurized, leakage or explosion, ignition, etc. are not observed in the battery 200, so it is necessary to check the safety of the battery in a case where the battery 200 can be continuously used. to be.

In step S300, a charge/discharge cycle test is performed by performing a charge/discharge cycle that repeats charging and discharging of the battery 200, which is pressurized by the battery charge/discharge cycle test unit 700, 100 times or more to calculate a battery capacity measurement result accordingly. This is a step to perform.

As described above, after the battery shock test according to the embodiments of the present invention, the charging/discharging cycle test apparatus 10 and the measuring method are continuously applied to a battery in a state of using the battery even after receiving a daily shock when using the battery in real life. You can check the safety of the battery by conducting charge and discharge tests. Therefore, it is possible to test the safety of the battery by assuming an environment in which the battery is continuously used in a daily life after daily impact on the battery.

As described above, the present invention has been described with reference to one embodiment shown in the drawings, but this is only an example, and those skilled in the art will understand that various modifications and modifications of the embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: charge and discharge cycle test device after battery shock test
100: chamber
200: battery
300: battery shock test unit
400: temperature measuring unit
500: voltage measuring unit
600: data collection unit
700: battery charge and discharge cycle test unit

Claims (7)

A chamber formed to test the battery under a set temperature;
A battery impact test unit located in the chamber and including a battery base formed to place the battery on a flat surface and a battery pressing portion formed to press the battery at a set pressure to apply an impact;
A temperature measuring unit including a chamber temperature measuring sensor capable of measuring the temperature inside the chamber and a battery temperature measuring sensor for measuring the temperature change of the battery to check the set temperature;
A voltage measuring unit for measuring the voltage of the battery;
A data collection unit connected to the temperature measurement unit and the voltage measurement unit to collect and display measured values; And
Battery charging and discharging cycle test unit comprising a battery charging and discharging cycle test unit for performing a test for calculating a battery capacity measurement result according to a predetermined number of times the charging and discharging cycle repeating charging and discharging on the pressurized battery Test device. According to claim 1,
The battery charge and discharge cycle test unit
A charging unit for charging the pressurized battery, a charging unit for supplying and discharging current to the pressurized battery, and a display unit for calculating and displaying a set number of charging and discharging cycles and a result of measuring the battery capacity accordingly. Discharge cycle test device. According to claim 1,
The set temperature is in the range of 15 °C to 25 °C, the battery charging and discharging cycle test device after the shock test. According to claim 1,
The pressure set in order to pressurize the battery is within a range of 12KN to 14KN, and a charge/discharge cycle test device after a battery shock test. According to claim 1,
The set number of times of the charge/discharge cycle is 100 or more times, and a charge/discharge cycle test device after a battery shock test. A preparation step of setting the inside of the chamber to a temperature within the range of 15°C to 25°C to install a battery shock test unit and a battery charge/discharge cycle test unit therein;
A pressing step of placing a battery on a flat surface of the battery base in the battery impact test unit and applying a shock to the battery by pressing the battery pressurizing unit at a set pressure; And
The battery charging and discharging cycle test unit performs a charging and discharging cycle test that calculates a battery capacity measurement result according to the charging and discharging cycle of repeating charging and discharging of the pressurized battery 100 times or more. Test and charge cycle test method. The method of claim 6,
The pressure set to pressurize the battery is within a range of 12KN to 14KN, a method of testing a charge/discharge cycle after a battery shock test.

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