KR101750328B1 - Apparatus for measuring wetting of secondary battery - Google Patents

Abstract

The present invention discloses an apparatus capable of quantitatively measuring electrolyte wettability with respect to a secondary battery. The wettability measurement apparatus according to the present invention is an apparatus for measuring the wettability of a secondary battery by an electrolytic solution, comprising: an internal space formed to accommodate an electrode assembly; and an inlet port through which the electrolyte can flow into at least one side, ; And a measuring unit provided on the inlet side to supply the electrolytic solution to the housing unit and measure the amount of the electrolytic solution supplied to the housing unit.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for measuring wettability of a secondary battery,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for measuring the wettability of a secondary battery, and more particularly, to a technique for quantitatively measuring the wettability of an electrode assembly with respect to an electrolyte solution in each secondary battery.

2. Description of the Related Art Generally, a secondary battery is a battery capable of being charged and discharged unlike a primary battery which can not be charged, and is widely used in electronic devices such as mobile phones, notebook computers, camcorders, and electric vehicles. Particularly, the lithium secondary battery has a larger capacity than a nickel-cadmium battery or a nickel-hydrogen battery and has a high energy density per unit weight, so that the utilization rate thereof is rapidly increasing.

These lithium secondary batteries mainly use a lithium-based oxide and a carbonaceous material as a cathode active material and an anode active material, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate each coated with such a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, and a jacket for sealingly storing the electrode assembly together with the electrolyte solution.

Meanwhile, the lithium secondary battery can be classified into a can type secondary battery in which an electrode assembly is embedded in a metal can, and a pouch type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, depending on the shape of the battery case.

The secondary battery is generally manufactured through a process in which a liquid electrolyte, that is, an electrolyte is injected and the battery case is sealed while the electrode assembly is housed in the battery case.

Here, the injected electrolyte is impregnated by the capillary force between the positive electrode plate, the negative electrode plate and the separator constituting the electrode assembly. However, the positive electrode plate, the negative electrode plate and the separator are materials having high hydrophobicity, whereas the electrolyte is a material having high hydrophilicity. It takes a considerable time to wet the electrode assembly by the electrolyte, and the process conditions are also severe.

If the electrolytic solution can not sufficiently penetrate between the positive electrode plate and the separator or between the negative electrode plate and the separator, the charge / discharge efficiency of the lithium ion or the like decreases, so that the performance of the secondary battery can not help but decrease.

Accordingly, various attempts have been made to improve the wettability of the secondary battery by the electrolyte solution. For example, a process of aging the secondary battery for a long time after the pouring step or the activating step of the electrolytic solution is performed.

However, a technology for quantitatively measuring the wettability by the electrolyte of the secondary battery has not been proposed so far. For example, there is a method for effectively measuring the wettability of the electrolyte solution which can be wetted to the electrode assembly in each secondary battery, or the time for which the electrolyte solution reaches the electrode assembly at the maximum not.

Therefore, until now, the electrolyte solution is not sufficiently injected during the production of the secondary battery, so that the wettability due to the electrolyte solution is not maximized. As a result, the performance of the secondary battery can not be exhibited properly or the electrolyte solution may be unnecessarily overcharged, . In addition, in the conventional case, the wettability of the electrolyte solution can not be maximized because a sufficient aging time is not achieved, or an excessive aging time may be required to make the manufacturing time unnecessarily long.

Accordingly, it is an object of the present invention to provide an apparatus for quantitatively measuring an electrolyte wettability of a secondary battery, such as an electrolyte solution wetting time and a wetting time, in order to solve the above problems.

Other objects and advantages of the present invention will become apparent from the following description, and it will be understood by those skilled in the art that the present invention is not limited thereto. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided an apparatus for measuring wettability of a secondary battery by an electrolyte, the apparatus comprising: an internal space formed to accommodate an electrode assembly; A receiving unit having an inlet formed therein; And a measuring unit provided on the inlet side to supply the electrolytic solution to the housing unit and measure the amount of the electrolytic solution supplied to the housing unit.

Preferably, the measuring unit receives the electrolytic solution, measures the reduced electrolytic solution in the electrolytic solution, and measures the amount of the electrolytic solution supplied to the accommodating unit.

Preferably, the measuring unit is made of a transparent material, and is configured in such a manner that a scale is displayed in the vertical direction.

Preferably, the accommodating unit includes a main body portion having an open top and a lid portion coupled to an upper end of the main body portion to seal the main body portion.

Still preferably, the wettability measurement apparatus further includes an insertion unit inserted between the inner surface of the accommodating unit and the outer surface of the electrode assembly.

Preferably, the accommodating unit is configured to be capable of changing the size of the internal space.

Still preferably, the wettability measurement apparatus further includes a timer unit for measuring time.

According to the present invention, the wettability of the secondary battery by the electrolytic solution can be measured easily and accurately quantitatively.

In particular, according to one aspect of the present invention, it is possible to accurately and easily grasp whether the wettability of the secondary battery by the electrolyte is maximized in manufacturing the secondary battery.

According to an aspect of the present invention, when the wettability of the electrolyte is maximized, the amount of the electrolytic solution impregnated, that is, the maximum wettability of the electrolytic solution, and the time required for the electrolytic solution to wet the electrode assembly It can be easily and quickly grasped. Moreover, through such information or the like, it is easy to grasp the amount of the electrolytic solution wetted on the electrode assembly per hour, that is, the rate of the electrolytic solution wetting.

Therefore, according to the present invention, it is possible to appropriately determine the amount of the electrolyte injected, the injection rate, and the aging time in the manufacturing process of the secondary battery through the amount of the electrolyte solution wetted by each secondary battery, According to the invention, it is possible to improve the performance of the secondary battery by maximizing the wettability of the electrolyte, and to prevent waste of electrolyte and manufacturing time.

According to an embodiment of the present invention, a wetting amount, a wetting time, a wetting speed, and the like of the electrode assembly can be quantitatively measured for a secondary battery having various shapes and sizes. This makes it possible to compare electrolyte wettability by each type or size of the secondary battery. Therefore, according to this embodiment of the present invention, it can be easily grasped whether the wettability of the secondary battery having any type or size can be maximized or minimized, and this can be helpful in the design of a high performance secondary battery.

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 augment the technical spirit of the invention. And should not be construed as limiting.
1 is a perspective view schematically showing a configuration of a wettability measurement apparatus according to an embodiment of the present invention.
Fig. 2 is an exploded perspective view of Fig. 1. Fig.
3 is an exploded perspective view schematically showing a part of the structure of a wettability measurement apparatus according to another embodiment of the present invention.
Fig. 4 is a top view of the coupling arrangement of Fig. 3; Fig.

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 the present specification and the configurations shown in the drawings are only 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.

The wettability measurement apparatus according to the present invention is an apparatus for measuring the wettability of the electrode assembly inside the secondary battery, that is, the wettability of the electrode assembly when the electrolyte is injected into the secondary battery. Here, the wettability can be used in various terms to mean that the electrolyte penetrates between the electrode assemblies, such as impregnation property and permeability.

1 is an assembled perspective view schematically showing a structure of a wettability measurement apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG. 1.

Referring to FIG. 1, the wettability measurement apparatus according to the present invention includes a storage unit 100 and a measurement unit 200.

The storage unit 100 may have an empty space formed therein so that the electrode assembly 1 can be housed in the internal space.

Here, the electrode assembly 1 housed in the housing unit 100 may have at least one positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate and the negative electrode plate, that is, the electrode plates may be formed as a structure in which the active material slurry is applied to the current collector. The slurry is usually agitated in the state where the active material, auxiliary conductor, binder, plasticizer, . On the other hand, each of the electrode plates may have an uncoated portion to which no slurry is applied, and an electrode tab corresponding to each electrode plate may be attached to the uncoated portion.

As shown in FIG. 2, the electrode assembly 1 includes a plurality of positive plates, a plurality of negative plates, and a plurality of separators. The electrode assembly 1 may be housed in the housing unit 100 in a stacked manner in the horizontal direction. Alternatively, the electrode assembly 1 may have various configurations such as a configuration in which a plurality of positive plates and a separator in which a plurality of negative plates are arranged are folded, or a configuration in which one positive electrode plate and negative electrode plate are wound with a separator interposed therebetween.

As described above, various types of electrode assemblies 1 can be housed in the housing unit 100 of the apparatus for measuring wettability of a secondary battery according to the present invention. Therefore, the accommodating unit 100 may be formed in various shapes corresponding to the shape of the electrode assembly 1. [ For example, as shown in FIGS. 1 and 2, the housing unit 100 may be formed in a rectangular parallelepiped shape, and in this case, it may be advantageous to store the stacked or foldable electrode assembly 1. Alternatively, the housing unit 100 may be formed in a cylindrical shape, and in this case, it may be advantageous for storing the wound electrode assembly 1.

The inlet unit (100) has an inlet (101) formed on at least one side thereof. The electrolytic solution can be supplied to the inner space of the housing unit 100 through the inlet 101. Since the wettability measurement apparatus according to the present invention is intended to measure the degree of wetting of the electrolyte solution in the electrode assembly 1, it is necessary to supply the electrolyte solution to the inner space of the housing unit 100 in which the electrode assembly 1 is housed . Therefore, the housing unit 100 is provided with an inlet 101, through which the electrolytic solution can be injected into the electrode assembly 1.

The inlet 101 may be located at a portion where the corners of the positive electrode plate and the negative electrode plate are formed so that the electrolyte can easily permeate into the gap between the positive electrode plate and the separator or between the negative electrode plate and the separator. For example, as shown in FIG. 2, when the electrode plate is stacked in the front-rear direction with reference to the drawing, the inlet 101 is formed at the front end or the rear end of the housing unit 100 where the edge of the electrode plate is not positioned And may be formed on the upper or lower portion, the left side portion, or the right side portion of the housing unit 100 where the edge of the electrode plate is located.

In particular, the position of the inlet 101 may be realized in a different form depending on the manufacturing environment when the secondary battery is manufactured. For example, in order to measure the wettability of a secondary battery in which an electrolytic solution is injected from the top to the bottom in the manufacturing process, the inlet 101 may be configured to be positioned at the top of the housing unit 100 as shown in FIG. 2 have.

The housing unit 100 is preferably made of a material which does not react with the electrolytic solution. Further, it is preferable that the housing unit 100 is made of a material which is easily broken and light. According to such a storage unit 100, the shape does not change even when the electrolytic solution is input, and safety and convenience in measurement can be ensured. For example, the storage unit 100 may be made of a material such as synthetic resin or iron. However, the present invention is not limited to the specific material of the housing unit 100.

The measurement unit 200 is provided on the side of the inlet 101 of the housing unit 100 and supplies the electrolyte solution to the housing unit 100 through the inlet 101. In particular, the inlet 101 may be formed on the top of the housing unit 100, and the metering unit 200 may also be located on top of the housing unit 100. In this case, the supply of the electrolyte solution from the measurement unit 200 to the storage unit 100 can be performed by gravity without requiring any additional power.

Particularly, in order to prevent the electrolytic solution from leaking while supplying the electrolytic solution to the accommodating unit 100, the measuring unit 200 is provided at the connecting portion of the measuring unit 200 and the accommodating unit 100, as shown in Fig. 2 A sealing member (not shown) may be provided.

The measurement unit 200 measures the amount of the electrolytic solution supplied to the housing unit 100. That is, the measurement unit 200 can measure how much electrolyte is supplied to the accommodating unit 100.

Such measurement information of the measurement unit 200 can be used for quantitatively grasping the wettability of the secondary battery. For example, the wettability of the secondary battery can be referred to as the amount of the electrolytic solution that has permeated through the electrode assembly 1. When the measurement unit 200 measures the amount of the electrolyte supplied to the storage unit 100, The amount of the electrolytic solution can be estimated as the amount of the electrolytic solution penetrated into the electrode assembly 1.

Preferably, the measurement unit 200 can be configured to receive an electrolyte, and an empty space for accommodating the electrolyte can be formed for this purpose. The measuring unit 200 can be configured to supply the electrolytic solution thus accommodated to the housing unit 100. [

For example, the measurement unit 200 may be configured in the form of a cylinder, and configured to receive electrolyte in the internal space.

In particular, the measurement unit 200 may be provided on the upper portion of the housing unit 100, and an opening may be formed on the lower end thereof. In this case, the lower end opening of the survey unit 200 may be configured to be connected to the inlet 101 of the accommodating unit 100. Therefore, the electrolytic solution contained in the measurement unit 200 can be supplied to the interior of the housing unit 100 through the lower opening and the inlet 101.

Here, the measurement unit 200 can measure the amount of the electrolytic solution supplied to the housing unit 100 through the reduced amount of the electrolytic solution. That is, the measurement unit 200 can be configured to measure to some extent the amount of electrolyte contained in the measurement unit 200. The decrease in the amount of electrolyte is caused by the supply of the electrolyte solution to the storage unit 100, The amount of the electrolytic solution supplied to the electrolytic cell 100 can be estimated. For example, the measurement unit 200 can measure 30 ml of the electrolytic solution supplied to the housing unit 100 when 30 ml of the electrolytic solution contained therein is decreased.

In addition, the measurement unit 200 may have an opening at an upper end thereof. In this case, the measurement unit 200 can receive the electrolytic solution through the upper opening.

For example, when the measuring unit 200 is formed in a cylindrical shape, an opening may be formed at both the upper end and the lower end, and an electrolytic solution may be injected through the upper end opening and a predetermined amount of electrolyte may be injected into the measuring unit 200 To be accommodated. The electrolytic solution contained in the measurement unit 200 can be discharged to the electrode assembly 1 of the housing unit 100 through the bottom opening.

More preferably, the metering unit 200 may include a lower opening / closing member when an opening is formed at the lower end. The lower opening / closing member is a component for opening and closing the opening formed at the lower end of the measurement unit 200, and can determine whether or not the measurement unit 200 supplies the electrolytic solution. For example, when the electrolytic solution is introduced into the measurement unit 200 through the upper opening, the lower opening and closing member is closed and the electrolytic solution flows out to the housing unit 100 through the lower opening during the electrolytic solution inflow into the measurement unit 200 Can be prevented. After the process of introducing the electrolytic solution into the measurement unit 200 is completed, the lower opening / closing member may be opened to allow the electrolytic solution to flow out from the measurement unit 200 to the storage unit 100.

Further, preferably, the metering unit 200 may include an upper opening / closing member 210 when an opening is formed at an upper end thereof. The upper openable and closable member 210 is a component for opening and closing an opening formed in the upper end of the measurement unit 200 and can prevent the electrolytic solution from overflowing or evaporating out from the measurement unit 200 to the upper opening. Therefore, according to this embodiment, the amount of the electrolyte solution supplied from the measuring unit 200 to the accommodating unit 100 can be measured more accurately.

Also, preferably, the measurement unit 200 may be made of a transparent material, and the scale may be displayed in the vertical direction. For example, the measurement unit 200 may be configured in the form of a scalpel cylinder.

According to this embodiment, the amount of reduction of the electrolytic solution contained in the measurement unit 200 can be easily measured with the naked eye. For example, if the amount of the electrolytic solution originally housed in the measuring unit 200 in the form of a scalpel indicates the scale of 100 ml, and if the amount of the electrolytic solution is stopped while pointing to the scale of 70 ml after a predetermined time has elapsed, Can be said to have penetrated into the electrode assembly 1 of the housing unit 100. Therefore, in this case, the wettability of the electrolytic solution can be estimated to be 30 ml.

However, the wetting amount of the electrolytic solution may be measured by the surveying unit 200 and displayed on a monitor or the like. In the above embodiment, the wetting amount of the electrolytic solution is determined by the naked eye of the observer. For example, the measurement unit 200 can display information indicating that the measurement amount is 30 ml on the monitor when the electrolyte decrease amount is measured to be 30 ml.

As described above, the wettability measurement apparatus according to the present invention can measure the amount of the electrolytic solution supplied from the measurement unit 200 to the accommodating unit 100, and the wettability of the electrode assembly 1 by the electrolytic solution That is, how much electrolyte has penetrated into the electrode assembly 1 can be measured.

In this case, it is preferable that the electrolytic solution is supplied from the measuring unit 200 to the accommodating unit 100 for a sufficient time in order to more accurately measure the wettability. For example, when the lower opening / closing member is opened to measure the amount of electrolyte decrease in the measurement unit 200 as in the above embodiment, the lower opening / closing member is opened for a predetermined period of time, It is good to measure the amount of electrolyte decrease. According to this embodiment, although the infiltration of the electrolytic solution can proceed further, it is possible to prevent the wettability of the electrolyte solution from being accurately measured.

1 and 2, the housing unit 100 may include a main body 110 and a lid 120. The main body 110 and the lid 120 may have the same shape.

The main body 110 has an accommodating space for accommodating the electrode assembly 1 and an upper end thereof is opened so that the electrode assembly 1 can be inserted into the accommodating space through the opened portion of the upper end . At this time, the opening area of the main body 110 has a size equal to or larger than the size of the electrode assembly 1 to be accommodated, so that the electrode assembly 1 can be easily inserted or withdrawn through the opened portion.

The lid part 120 closes the opened part of the main body part 110 by sealing the opened part of the main body part 110. However, the inlet 101 may be formed in the lid 120 for the input of the electrolyte solution. In this configuration, the electrode assembly 1 is housed in the main body 110 through the opened portion in a state that the cover 120 is not covered, and then the cover 110 is closed to cover the main body 110 can do. According to this embodiment of the present invention, the insertion of the electrode assembly 1 can be facilitated because the storage unit 100 is configured as a separate type of the main body 110 and the lid 120.

The storage unit 100 may include a sealing member 130 at a connection portion between the main body 110 and the lid 120.

The sealing member 130 is a component for sealing the joint portion between the main body 110 and the lid 120 to strengthen the sealing force. It may be difficult to accurately measure the amount of the electrolytic solution impregnated into the electrode assembly 1 due to the leaked electrolyte, that is, the electrolyte wettability, when the electrolyte leaks to the joint between the body 110 and the cover 120. According to this embodiment of the present invention, however, leakage of the electrolyte from the joint portion between the main body 110 and the lid 120 can be effectively prevented. Therefore, measurement accuracy of the electrolyte fluid wettability is reduced due to leakage of the electrolyte solution Can be prevented.

The sealing member 130 may have an O-ring shape or the like suitable for the shape of the measurement unit 200. The sealing member 130 may be made of a material such as Teflon which is excellent in sealing ability and does not dissolve in the electrolyte solution. However, the present invention is not limited to the shape and material of the sealing member 130. The sealing member 130 may be formed of various shapes or materials capable of sealing the main body 110 and the lid 120, .

The housing unit 100 may include a fastening member 140 at a portion where the main body 110 and the lid 120 are coupled.

The fastening member 140 is a component for fastening the main body 110 and the lid 120 to each other so that the fastening member 140 tightens the coupling force between the main body 110 and the lid 120 . Therefore, according to this embodiment of the present invention, it is possible to prevent the electrolyte from leaking from the joint portion between the main body 110 and the lid 120.

Here, the fastening member 140 may be implemented as a clamp. Such a clamp-type fastening member 140 can make the coupling force between the main body 110 and the lid 120 more rigid. However, the present invention is not limited to this type of fastening member, and the fastening member 140 may be embodied in various forms. For example, the fastening member 140 may be formed in a bolt shape so that the main body 110 and the lid 120 are fastened together by inserting bolts.

Preferably, the wettability measurement apparatus according to the present invention may further include an insertion unit. This will be described in more detail with reference to FIG. 3 and FIG.

FIG. 3 is an exploded perspective view schematically showing a part of the apparatus for measuring wettability according to another embodiment of the present invention, and FIG. 4 is a top view of the combined structure of FIG. In Figs. 3 and 4, for convenience of illustration, the cover 120 or the metering unit 200 of Figs. 1 and 2 are not shown. 3, the electrode assembly 1 and the inserting unit 300 are shown in a state in which they are not completely inserted into the accommodating unit 100 for convenience of explanation.

3 and 4, the insertion unit 300 is inserted between the inner surface of the housing unit 100 and the outer surface of the electrode assembly 1. In order to estimate the electrolyte wettability through the electrolyte supply amount measured by the measurement unit 200, the electrolyte supplied to the storage unit 100 must be supplied between the electrode assemblies 1, that is, between the positive plate and the separator or between the negative plate and the separator , And is not supplied to the outside of the electrode assembly (1). Therefore, it is preferable to reduce the void space between the electrode assembly 1 and the inner surface of the housing unit 100 as much as possible. The accommodating unit 100 can fill the void space between the inner surface of the accommodating unit 100 and the outer surface of the electrode assembly 1 as described above, thereby preventing or reducing the supply of the electrolyte solution to the space.

In particular, the inserting unit 300 may be provided in various types so as to have various sizes and shapes to suit the electrode assembly 1 having various sizes and shapes. According to this embodiment, since the accuracy of measurement of wettability can be ensured even for electrode assemblies 1 of various sizes and shapes, the wettability of various secondary batteries can be measured.

3 and 4, one insertion unit 300 is illustrated as being inserted between the storage unit 100 and the electrode assembly 1, but this is merely an example, (300) may be inserted. For example, the four insertion units 300 may be configured to be respectively inserted outside the four sides of the electrode assembly 1.

3 and 4, the insertion unit 300 is shown as being inserted only on the side surface of the electrode assembly 1, but the insertion unit 300 may be formed on the upper portion of the electrode assembly 1 and / May be inserted into the lower portion.

Although a configuration using the insertion unit 300 is described to reduce the space between the electrode assembly 1 and the storage unit 100 in the above embodiment, In order to reduce the space, the accommodating unit 100 may be configured to be capable of changing the size of the internal space. For example, the accommodating unit 100 may be configured to be adjustable in the horizontal direction and / or the vertical direction so as to correspond to various sizes and shapes of the electrode assembly 1.

Still preferably, the wettability measurement apparatus according to the present invention may further comprise a timer unit.

The timer unit measures time. For example, the timer unit can measure the time from when the electrolyte solution is supplied to the storage unit 100 by the measurement unit 200 to when the supply of the electrolyte solution is stopped.

The timer unit may be activated by the user at a start time or an end time point of time measurement. For example, the timer unit may include a switch so that when the switch is depressed by the user, the time measurement is started and the time measurement can be stopped if the switch is pressed again.

Alternatively, the timer unit can determine the start time or the stop time point for the time measurement by itself. For example, when the lower unit is provided in the measurement unit 200, the timer unit can start the time measurement by reporting the time when the lower openable and closable member is opened to the start time for the time measurement. Further, the timer unit can terminate the time measurement by reporting the time point at which the supply amount of the electrolyte solution no longer changes in the measurement unit 200 as the end time point for the time measurement.

The timer unit may also provide the measured time information to a user or provide it to other components, such as the measurement unit 200. For example, when the timer unit measures the time (electrolyte supply time) from the start time to the stop time for the electrolyte supply to 30 hours, this time information can be provided to the user. Then, the user can predict the 30 hours measured in this way as the time necessary for completing the electrolyte wetting.

In addition, the user can calculate the wetting speed of the electrolytic solution using the time information measured by the timer unit and the measurement information measured by the measurement unit 200 in this manner. For example, when the electrolyte supply time measured by the timer unit is 30 hours (hr) and the electrolyte supply amount measured by the measurement unit 200 is 30 ml, the electrolyte wetting speed can be estimated at 1 ml / hr .

Meanwhile, the apparatus for measuring wettability according to the present invention may further comprise a speed calculation unit.

The speed calculation unit calculates the electrolyte wetting speed, that is, the amount of electrolytic solution wetted by the electrode assembly 1 per hour. To this end, the speed calculation unit can use the supply amount measurement information by the measurement unit 200 and the time measurement information by the timer unit. For example, when the measurement unit 200 measures the electrolyte supply amount at 30 ml and the timer unit measures the electrolyte supply time at 30 hours, such information is transmitted from the measurement unit 200 and the timer unit to the speed calculation unit, respectively . Then, based on the information thus transmitted, the speed calculating unit can calculate the electrolyte wetting speed at 1 ml / hr. According to this embodiment, the average wetting speed of the electrolytic solution can be calculated quickly and accurately, and the user does not have to check and calculate the measurement information by the measurement unit 200 and the measurement information by the timer unit.

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 limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

1: electrode assembly
100: storage unit
101: inlet
110:
120:
130: sealing member
140: fastening member
200: Measurement unit
210: upper opening / closing member
300: insertion unit

Claims (14)

An apparatus for measuring wettability of a secondary battery by an electrolytic solution,
A housing unit in which an internal space is formed in a shape corresponding to the shape of the electrode assembly so that the electrode assembly can be housed and an inlet port through which the electrolyte solution can flow at least is formed; And
A measuring unit provided on the inlet side to receive an electrolyte solution and supply the electrolyte solution to the housing unit, measure a reduced electrolyte solution in the electrolyte solution, and measure the amount of the electrolyte solution supplied to the housing unit,
Wherein the wettability measurement apparatus comprises:
delete The method according to claim 1,
Wherein the measuring unit has an opening at an upper end and a lower end, respectively, so that the electrolytic solution flows in through the upper opening, and the electrolytic solution is discharged to the accommodating unit through the lower opening. The method of claim 3,
Wherein the measuring unit includes a lower opening / closing member for opening / closing the lower opening. 5. The method of claim 4,
Wherein the measuring unit has a top opening / closing member for opening / closing the top opening. The method according to claim 1,
Wherein the measuring unit is made of a transparent material, and is scaled in the vertical direction. The method according to claim 1,
Wherein the accommodating unit has a main body portion with an open top and a lid portion coupled to an upper end of the main body portion to seal the main body portion. 8. The method of claim 7,
Wherein the accommodating unit has an O-ring-shaped sealing member at an engagement portion between the main body portion and the lid portion. 8. The method of claim 7,
Wherein the accommodating unit includes a fastening member for fastening the main body part and the lid part. 10. The method of claim 9,
Wherein the fastening member is implemented as a clamp. The method according to claim 1,
Further comprising an insertion unit inserted between an inner surface of the accommodating unit and an outer surface of the electrode assembly. The method according to claim 1,
Wherein the accommodating unit is configured to be capable of changing the size of the inner space. The method according to claim 1,
Further comprising a timer unit for measuring a time. 14. The method of claim 13,
Further comprising a speed calculating unit that calculates the electrolyte wetting speed using the supply amount measurement information by the measurement unit and the time measurement information by the timer unit.

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