KR101783921B1 - Equipment For Evaluating Cell - Google Patents

Abstract

The present invention discloses a battery evaluation apparatus. An apparatus according to the present invention comprises: a battery shorting member including a first sensor and a press-in needle; A battery support member including a plate-shaped test stand including a through hole facing perpendicularly to the battery shorting member, and a pedestal which contacts the test stand below the test stand and supports the first movement of the test stand around the through hole of the test stand; A needle bearing member including a roller and a second sensor which are in contact with the press-in needle through the through hole of the test bench to relatively move the second movement relative to the test bench horizontally; And a recording system electrically connected to the first sensor and the second sensors.

Description

[0001] Equipment For Evaluating Cell [

The present invention relates to a battery evaluation apparatus and method for evaluating a battery suitable for quickly and reliably sensing a voltage generated due to a short-circuit current and a heat generation temperature of a secondary battery by artificially shorting the positive and negative current collectors of the secondary battery using a nail ≪ / RTI >

Recently, in order to reduce the air pollution caused by the exhaust gas of a vehicle, the vehicle is being manufactured based on a study for securing a driving force by using an internal combustion engine and / or an electric motor. Accordingly, the vehicle evolved in the order of a hybrid car, a plug-in hybrid car, and an electric car. In this case, the hybrid vehicle and the plug-in hybrid vehicle have an internal combustion engine, an electric motor and a battery, and the electric vehicle has an electric motor and a battery without an internal combustion engine.

In addition, the battery has evolved with hybrid cars, plug-in hybrid cars and electric vehicles. The battery is configured to be chargeable outside the electric vehicle. The battery has a plurality of battery packs, and each of the battery packs has pouch type secondary batteries. Each of the secondary batteries includes at least one positive electrode collector and at least one negative electrode collector. The positive electrode collector and the negative electrode collector are formed in a plate shape in the secondary battery so as to face each other.

The secondary battery is configured to supply power in a field region such as a vehicle. Before being used in the field region, the secondary battery receives a safety evaluation in response to an environmental condition of a field region. The safety evaluation has a test step of artificially short-circuiting the secondary battery to confirm the electrical characteristics and / or heat generation characteristics of the secondary battery. In the test step, the secondary battery is penetrated through the test pin. Then, the positive electrode collector and the negative electrode collector of the secondary battery are electrically short-circuited by the test pin.

On the other hand, before the secondary battery is penetrated by the test pin, voltage sensors are disposed on the head of the test pin (opposite of the tie point) and on the positive and negative terminals of the secondary battery, respectively. In order to measure the temperature of the secondary battery, temperature sensors are disposed on the head of the test pin, the positive terminal and the negative terminal of the secondary battery, and the main body of the secondary battery, respectively. Therefore, the above testing step requires a lot of work by the operator in order to evaluate the safety of the secondary battery.

In addition, in the testing step, the safety evaluation of the secondary battery may be performed using a test pin having a temperature sensor inside the secondary battery in consideration of the heat generated from the secondary battery after passing the test pin through the secondary battery. For example, Japanese Unexamined Patent Application Publication No. 2012-215537 (published on November 8, 2012) discloses a safety evaluation test method, a stability evaluation test apparatus, and a fracture measurement apparatus with a thermocouple. The thermocouple damage measurement mechanism is configured to measure the temperature generated from the test body by providing two thermocouples inside the thermocouple to extend thermocouples from the head to the periphery of the apex to generate thermoelectric power after penetrating the test body (battery).

However, the above-mentioned breakage measuring instrument with a thermocouple discloses a complicated structure in which it is difficult to confirm the shape of two thermocouples during the service life inside. With reference to the above-mentioned prior art, the test step has a disadvantage in that a work requiring a lot of worker workload is used as a whole and a mechanism having a complicated structure is used.

It is an object of the present invention to provide a battery evaluation device which is suitable for easily performing voltage measurement and temperature measurement of a secondary battery during a short-circuiting test of the secondary battery.

The present invention directly confirms the constituent elements for confirming the electrical characteristics of the secondary battery in the short-circuited state by the operator's eyes, so that the evaluation of the battery suitable for trusting the stability evaluation result of the secondary battery (hereinafter referred to as "battery" There is another purpose in providing the device.

According to an aspect of the present invention, there is provided a battery evaluation device comprising: a battery shorting member including a first sensor and a press-in needle; A plate-shaped test bed including a through hole facing perpendicular to the battery shorting member, and a pedestal which contacts the test stand under the test stand and supports a first movement of the test stand around the through hole of the test stand, A support member; A needle bearing member including a roller and second sensors for contacting the press-in needle through the through-hole of the test bench to relatively move the second motion relative to the test bench horizontally; And a recording system electrically connected to the first sensor and the second sensors.

Preferably, the press-in needle is formed of a conductor.

Preferably, the first sensor is located on the opposite side of the tip of the press-in needle and is electrically connected to the press-in needle.

Preferably, the through hole of the test table has a diameter larger than an outer diameter of the press-in needle.

Advantageously, said pedestals are characterized by comprising hydraulic or pneumatic cylinders.

Preferably, the first movement is performed in parallel with the opening direction of the through hole of the test table.

According to the present invention, the needle accepting member is fixed to the test table below the test table, and has a hollow inside, and has a guide at each of the opposite side walls; And an elastic member enclosed by the housing, the elastic member being fixed to one side wall between the side walls at the inside of the housing, a moving block positioned in the hollow of the housing in contact with the elastic member, And a moving member including ribs extending at right angles to the opening direction of the through hole of the test table via the guide holes of the housing.

Preferably, the housing is made of an insulator and is fixed to the test stand through screw members or an adhesive.

Preferably, the elastic member includes a spring.

Advantageously, the moving block is made of an insulator and is adapted to perform the second movement with the ribs along the guide holes of the housing through the elastic force of the elastic member in contact with the roller and the press- .

Preferably, the second movement is performed so as to be perpendicular to the opening direction of the through hole of the test table.

Preferably, the second sensors and the roller are integrally formed, the roller is made of a conductor, and the ribs are made of an insulator.

Advantageously, said second sensors are each inserted into the free ends of said ribs in rotation axes, said rollers being located between said free ends of said ribs and electrically connected with said second sensors .

The battery evaluation device according to the present invention has a simple structure by using the voltage sensors attached to the needle accepting member and the battery shorting member, including the needle accepting member, the cell supporting member and the battery shorting member, It is possible to reduce the workload of the operator compared to the prior art.

The battery evaluation device according to the present invention is capable of sufficiently separating the voltage sensors attached to the needle accepting member and the battery shorting member from the battery so that the obsolete shape of the voltage sensor can be directly confirmed through the eyes of the operator during the service life, The safety evaluation results are reliable compared to the prior art.

The battery evaluating apparatus according to the present invention senses the voltage between the needle accepting member and the battery and confirms the heat generation temperature of the battery based on the voltage, so that the stability evaluation of the battery can be confirmed more quickly than in the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate an embodiment of the invention and, together with the description given below, serve to further augment the technical spirit of the invention, And shall not be interpreted.
1 is an exploded perspective view showing a battery evaluation apparatus according to an embodiment of the present invention.
2 is a perspective view showing a battery evaluation apparatus according to an embodiment of the present invention in more detail.
Fig. 3 and Fig. 4 are schematic views for explaining the operation method of the battery evaluation apparatus of Fig. 1. Fig.

Hereinafter, embodiments of the present invention will be described 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 meanings, and the inventor should appropriately interpret the concept of a term appropriately in order to describe its own application in the best way possible. 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 the present specification and the configurations shown in the drawings are only examples of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents And variations are possible.

In the embodiment described below, the battery refers to a lithium secondary battery. Here, the lithium secondary battery is generally referred to as a secondary battery in which lithium ions act as working ions during charging and discharging to cause an electrochemical reaction between the positive electrode and the negative electrode.

On the other hand, lithium ions are used as working ions even if the name of the battery is changed depending on the type of the electrolyte or separator used in the lithium secondary battery, the type of the packing material used for packing the lithium secondary battery, the structure of the inside or outside of the lithium secondary battery, The battery should be interpreted as being included in the category of the lithium secondary battery.

The present invention is also applicable to batteries other than lithium secondary batteries. Therefore, even if the working ion is not lithium ion, any type of battery to which the technical idea of the present invention can be applied should be construed as falling within the scope of the present invention.

Further, the battery is not limited by the number of constituent elements thereof. Accordingly, the battery may include an anode / separator / cathode assembly and an electrolyte in one package.

1 is an exploded perspective view showing a battery evaluation apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a battery evaluation apparatus 100 according to the present invention includes a battery supporting member 10, a needle accepting member 50, a battery shorting member 70, and a recorder 90. The battery supporting member 10 has a dimension along the X axis, the Y axis, and the Z axis. The cell supporting member 10 has a shape of a desk, but is not limited thereto. The battery supporting member 10 is configured to have a space for smoothly moving the roller 44 of the needle accepting member 50 below the through hole 6 along the Y axis.

The needle accepting member 50 may be arranged along the X axis and the Y axis on the lower side of the cell supporting member 10. [ More specifically, the needle accepting member 50 is disposed on the lower side of the battery supporting member 10 while exposing the roller 44 to the through-hole 6 of the cell supporting member 10. [ The battery short-circuit member 70 is disposed on the upper side of the battery supporting member 10. That is, the battery short-circuiting member 70 is positioned facing the through-hole 6 of the battery supporting member 10 along the Z-axis.

The recorder 90 has an electrical connection (not shown in the figure) to the needle accepting member 50 and the battery short-circuit member 70. The recorder 90 is located on the cell support member 10, but is not limited thereto.

2 is a perspective view showing a battery evaluation apparatus according to an embodiment of the present invention in more detail.

Referring to FIG. 2, the battery short-circuit member 70 of the battery evaluation apparatus 100 includes a press-in needle 64 and a first sensor 68. The press-in needles 64 have a pin shape and are made of a conductor. The indentation needles 64 have a predetermined diameter and extend along the Z axis. The first sensor 68 is located on the opposite side of the tip of the press-in needles 64 and is electrically connected to the press-in needles 64. Preferably, the first sensor 68 may be a voltage sensor.

The battery supporting member 10 of the battery evaluating apparatus 100 has a pedestal 3 and a test bed 9. The pedestals 3 are located along the X-axis and the Y-axis under the test bed 9 and contact the test bed 9. The pedestals (3) support the first movement of the test stand (9) around the through holes (6) of the test stand (9). The first movement is performed along the Z-axis in parallel with the opening direction of the through-hole 6 of the test table 9. [ The pedestals (3) include hydraulic or pneumatic cylinders.

The test bench 9 includes a through hole 6 formed in a plate shape along the X axis, the Y axis, and the Z axis and facing the battery shorting member 70 vertically along the Z axis. The through hole (6) of the test table (9) has a diameter larger than the outer diameter of the press-in needles (64). The needle accepting member 50 of the battery evaluating apparatus 100 is positioned between the supports 3 under the test stand 9 and fixed to the lower side of the test stand 9. [ Preferably, the needle receiving member 50 includes a shifting member 28, a roller 44, a second sensor 48 and a housing 38.

The housing 38 is fixed to the lower surface of the test bed 9 and has a hollow interior and a pair of guide openings 34 on the side walls facing each other along the X axis. The guide holes 34 are opened along the Y axis in the housing 38 to expose the inside of the housing 38 to the outside of the housing 38. The housing 38 is made of an insulator and can be fixed to the lower surface of the test bed 9 through screw members or an adhesive.

The moving member 28 includes an elastic member 22 accommodated in the housing 38 and ribs 26 that are exposed to the outside of the housing 38 through the moving block 24 and the guide holes 34 of the housing 38 ). The elastic member 22 elastically biases the moving block 24 in the Y-axis within the housing 38. That is, the elastic member 22 may be compressed or stretched along the Y axis. To this end, the elastic member 22 is fixed to one inner wall of the housing 38 at one end and fixed to the moving block 24 at the other end.

The elastic bias is performed by the movement of the ribs 26. Preferably, the elastic member 22 includes but is not limited to a spring. The moving block 24 is in contact with the resilient member 22 and is located in the hollow of the housing 38. The moving block 24 is made of an insulator and performs a second movement along the guide holes 34 of the housing 38 through the elastic force of the elastic member 22.

The second movement is performed along the Y-axis at right angles to the opening direction of the through hole 6 of the test table 9. [ The ribs 26 are made of an insulator and protrude from the moving block 24 and pass through the guide holes 34 of the housing 38 so that the Y axis is perpendicular to the opening direction of the through hole 6 of the test bench 9 Lt; / RTI > In addition, the needle receiving member 50 further includes a roller 44 and a second sensor 48. In one example, the roller 44 and the second sensor 48 may be integrally formed.

The roller 44 and the second sensor 48 are coupled to the moving member 28 to perform a second movement with the moving member 28. Specifically, the roller 44 and the second sensor 48 intermittently come into contact with the press-in needles 64 of the battery short-circuit member 70 through the through-holes 6 of the test stand 9, Relative to the test bed 9 around the through-hole 6 of the test bed 9. Here, the second sensors 48 are inserted into the free ends of the ribs 26 (on the opposite sides of the guide grooves in the Y-axis direction), respectively.

The rollers 44 are positioned between the free ends of the ribs 26 to electrically connect with the second sensors 48. The roller 44 is made of a conductor. The second sensors 48 are voltage sensors. The recorder 90 of the battery evaluation apparatus 100 is electrically connected to the first sensor 68 of the battery short circuit member 70 and the second sensor 48 of the needle acceptance member 50. [ In detail, the recorder 90 is electrically connected to the first sensor 68 and the second sensor 48 through the first line L1 and the second line L2.

Fig. 3 and Fig. 4 are schematic views for explaining the operation method of the battery evaluation apparatus of Fig. 1. Fig.

Referring to Fig. 3, in order to perform the safety evaluation, the battery evaluation apparatus 100 may be prepared. The battery evaluation apparatus 100 will be described in detail with reference to FIGS. 1 and 2. FIG. The roller 44 of the needle accepting member 50 of the battery evaluating apparatus 100 can be exposed to the through hole 6 of the test stand 9 of the battery supporting member 10 in an initial state. At this time, the roller 44 corresponds to the maximum elongation of the elastic member 22 since the external physical force is not applied in the initial state. Next, the battery 118 may be seated on the test stand 9.

The battery 118 may be pouch-shaped, but not limited thereto. The battery 118 may be charged to a predetermined state of charge (SOC) before it is placed on the test stand 9 or after it is placed on the test stand 9. Preferably, the battery 118 may be positioned on the through hole 6 of the test bed 9 of the battery evaluation apparatus 100. Here, the test bench 9 may have aligning members (not shown) aligning the center of the through hole 6 and the center of the battery 118 around the through hole 6. The battery 118 covers the through-hole 6.

Referring to FIG. 4, the pedestals 3 of the battery supporting member 10 of the battery evaluation apparatus 100 can perform the first motion M1 along the Z-axis. The pedestals (3) move the test stand (9) toward the battery shorting member (70) by using hydraulic pressure or pneumatic pressure. The battery short-circuit member 70 can be brought into contact with the battery 118 while the test stand 9 is moved toward the battery short-circuit member 70.

While the test stand 9 is continuously moved toward the battery short-circuiting member 70, the press-in needles 64 of the battery short-circuiting members 70 are held in contact with the external appearance of the battery 118, Through the at least one negative electrode current collector and at least one positive electrode current collector to the through hole 6 of the test stand 9. At this time, the press-in needles 64 electrically short-circuit the anode current collector and the cathode current collector inside the battery 118.

The press-in needles 64 may form press-fit holes 114 in the battery 118. The battery 118 is changed from the charged state to the discharged state and transfers the charge stored in the negative electrode current collector or the positive electrode current collector to the first sensor 68 through the press-in needles 64. When the first sensor 68 receives a charge from the negative electrode current collector or the positive electrode current collector, the first sensor 68 can transmit the first electrical signal corresponding to the charge magnitude to the recorder 90 in real time .

Thereafter, the press-in needles 64 can be brought into contact with the rollers 44 of the needle accepting members 50 via the through-holes 6 of the test stand 9. The contact between the press-in needles 64 and the rollers 44 sequentially causes the rotary motion R and the second motion M2 of the rollers 44 in the moving member 28 and the roller 44 and the ribs 26, And the elasticity of the elastic member 22 through the moving block 24 is increased. Here, the ribs 26 are moved to the left in the drawing along the guide holes 34 of the housing 38.

Since the roller 44 and the press-in needles 64 are conductors, the battery 118 can store the charge stored in the positive or negative electrode current collector through the press-in needles 64 and the rollers 44, 48). When the second sensor 48 receives a charge from the positive electrode collector or the negative electrode collector, the second sensor 48 can transmit a second electrical signal corresponding to the charge magnitude to the recorder 90 in real time .

The recording system 90 receives the first and second electrical signals from the first sensor 68 and the second sensor 44 and outputs the voltage between the first sensor 68 and the second sensor 48 to the first And can be displayed on the outside by moving the display needle 84 to the monitor window 84. [ The recording system 90 displays the voltage between the first sensor 68 and the second sensor 48 in the monitor window 84 in an analog manner, but is not limited thereto.

In addition, since the recording system 90 receives a resistance value according to the kind of the press-in needles 64 and a resistance value of the roller 44 through the safety evaluation operator, the recording system 90 uses the microprocessor Based on the voltage between the first sensor 64 and the second sensor 48, the value of the heat generation temperature generated around the press-in needles 64 and the battery 118, for example, around the press- (Including time, area, resistance, current, power, and / or joule heat).

The recording system 90 can display the temperature of the heat generated between the press-in needles 64 and the battery 118 on the outside through the second monitor window 88 in an analog manner or a digital manner.

In describing various embodiments of the invention, the named elements in the description should be understood to be functionally distinct elements rather than physically distinct elements. Thus, each component may be selectively integrated with another component, or each component may be divided into sub-components for efficient execution of the present invention. It will be apparent to those skilled in the art, however, that, even if components are integrated or partitioned, the integrity of the functionality can be recognized, it is understood that the integrated or segmented components are also within the scope of the present invention.

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.

3; Pedestal, 9; Test bench
10; A cell support member, 28; Movable member
38; A housing, 44; roller
48, 68; Sensor, 50; The needle-
64; Indentation needle, 70; The battery short-
90; Recorder, 100; Battery evaluation device

Claims (13)

A battery shorting member including a first sensor and a press-in needle;
A plate-shaped test bed including a through hole facing perpendicular to the battery shorting member, and a pedestal which contacts the test stand under the test stand and supports a first movement of the test stand around the through hole of the test stand, A support member; And
A needle bearing member including a roller and second sensors for contacting the press-in needle through the through-hole of the test bench to relatively move the second motion relative to the test bench horizontally; And
And a recording system electrically connected to the first sensor and the second sensors,
The needle-
A housing fixed to the test table below the test table and having hollows therein and having guide holes on opposite side walls; And
An elastic member which is surrounded by the housing and is fixed to one side wall between the side walls at the inside of the housing; a movable block which is located in the hollow of the housing in contact with the elastic member; Further comprising a moving member including ribs extending at right angles to the opening direction of the through hole of the test table via the guide holes of the housing. The method according to claim 1,
Wherein the press-in needle is made of a conductor. The method according to claim 1,
Wherein the first sensor is located on the opposite side of the tip of the press-in needle and is electrically connected to the press-in needle. The method according to claim 1,
Wherein the through hole of the test bed has a diameter larger than an outer diameter of the press-in needle. The method according to claim 1,
Wherein said pedestal includes a hydraulic or pneumatic cylinder. The method according to claim 1,
Wherein the first movement is performed in parallel with the opening direction of the through hole of the test table. delete The method according to claim 1,
The housing includes:
Insulator,
And is fixed to the test table through screw members or an adhesive. The method according to claim 1,
Wherein the elastic member comprises a spring. The method according to claim 1,
The moving block includes:
Insulator,
And the second movement is performed along with the ribs along the guide holes of the housing through the elastic force of the elastic member in contact with the roller and the press-in needle. The method according to claim 1,
And the second movement is performed so as to be perpendicular to an opening direction of the through hole of the test table. The method according to claim 1,
The second sensors and the roller are integrally formed,
The roller comprises a conductor,
Wherein the ribs are made of an insulator. The method according to claim 1,
The second sensors being inserted into the free ends of the ribs, respectively,
Wherein the roller is located between the free ends of the ribs and electrically connected to the second sensors.

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