WO2021153839A1

WO2021153839A1 - Gripper for charging and discharging of pouch-type battery

Info

Publication number: WO2021153839A1
Application number: PCT/KR2020/002284
Authority: WO
Inventors: 임종현
Original assignee: (주)에이프로
Priority date: 2020-01-31
Filing date: 2020-02-18
Publication date: 2021-08-05
Also published as: KR20210097903A; KR102363196B1

Abstract

The present invention relates to a gripper for charging and discharging of a pouch-type battery and, particularly, to a gripper for charging and discharging of a pouch-type battery, which has a clip-type configuration and thus can minimize poor contact with an electrode lead of a pouch-type battery, and is configured so that a current electrode terminal and a voltage electrode terminal come into contact with both sides of the electrode lead of the pouch-type battery, so as to enhance the contact reliability and increase the contact area, thereby ultimately improving the charging and discharging efficiency and reliability.

Description

Gripper for charging and discharging pouch-type batteries

The present invention relates to a gripper for charging and discharging of a pouch-type battery. In particular, by configuring the gripper for charging and discharging in a tongs type, contact failure with the electrode lead of the pouch-type battery can be minimized, and the current electrode terminal and the voltage electrode terminal are provided in the pouch. By configuring so that both sides of the electrode lead of the battery-type battery are in contact, the contact reliability can be improved and the contact area can be increased. it's about

Recently, with the rapid development of electricity, electronics, communication and computer industries, the demand for high-performance and high-safety batteries is gradually increasing. The demand for thinning is increasing day by day. In response to these demands, lithium secondary batteries with high energy density are receiving the most attention recently.

Lithium secondary batteries have the advantages of long lifespan and large capacity, and are widely used in portable electronic devices in recent years. and lithium polymer batteries using batteries. In addition, the lithium secondary battery is classified into a prismatic battery in which a prismatic can is used, a cylindrical battery in which a cylindrical can is used, and a pouch-type battery in which a pouch is used according to the type of the exterior material for sealing the electrode assembly.

Among them, the pouch-type battery has advantages such as higher energy density per unit weight and volume, thinner and lighter battery, and lower material cost as an exterior material.

In the method of manufacturing such a pouch-type battery, first, a positive electrode plate and a negative electrode plate are prepared, a separator is interposed therebetween, and then laminated to prepare an electrode assembly. A tab is welded to the lead of the electrode assembly manufactured as described above, and is embedded in the pouch. After the electrode assembly is embedded in the pouch, an electrolyte is injected into the pouch to impregnate the electrode assembly with the electrolyte. When the electrolyte is injected as described above, the edges of the pouch are joined by thermal fusion to seal the pouch.

The pouch-type battery assembled as described above has a pressurization activation process (pre-formation process) in which the pouch is activated by pressing in order to evenly spread the electrolyte filled inside the pouch, and aging (pre-formation process) to stabilize the battery. Aging) process and a charging/discharging process (formation process) for activating the battery are performed.

The pouch-type battery charging/discharging process is performed by a pouch-type battery charging/discharging device having a gripper for charging and discharging the pouch-type battery.

A gripper for charging and discharging a pouch-type battery according to a conventional embodiment is shown in FIG. 1 .

The gripper for charging and discharging the conventional pouch-type battery is equipped with a plurality of current applying pieces 2 on one support 1, and one voltage measuring piece 3 is mounted on the center or one side of the support 1 is composed of

That is, the current applying pieces 2 are in contact with the electrode lead of the pouch-type battery to conduct current, and the voltage measuring piece 3 is in contact with the electrode lead of the pouch-type battery to measure the voltage at the time of charging or discharging. plays a role in measuring.

However, the conventional current applying piece (2) could not be installed in a large area because it was mounted avoiding the width (S) of the voltage measuring piece (3) mounted on the support (1).

As described above, when the width of the current applying piece 2 is small, the contact area with the electrode piece is reduced, and the contact resistance increases and heat is generated a lot. had caused

In order to solve this problem, Republic of Korea Patent Registration No. 10-1065392 (hereinafter referred to as "prior art literature") discloses an electrode piece (electrode lead) of a battery (pouch-type battery) with a support and a current applying piece attached to the support. And in the battery charging and discharging jig (gripper) for charging and discharging the battery by close contact between the voltage measuring pieces, the current applying piece is attached to the support without the voltage measuring piece, and the voltage measuring piece is separately attached to the support to measure the voltage. This is done by attaching the voltage measuring piece to the support by means of an attachment means after measuring it. Since the contact area is widened by the widened width of the current applying piece, the contact resistance can be reduced and the amount of heat generated during charging and discharging can be reduced. Disclosed is a jig for battery charging and discharging that can simultaneously improve charging and discharging efficiency.

However, in the prior art document, since the voltage measuring piece is structurally completely separated in order to increase the contact area for the current applying piece, it is structurally complicated, resulting in an increase in time, effort and cost for manufacturing, Since the current applying piece contacts only one side of both sides of the electrode piece of the battery, there is still a limit to increasing the contact area of the current applying piece to the electrode piece of the battery, and the current applying piece and the voltage applying piece to the electrode piece of the battery There is a problem that the contact failure and contact error cannot be fundamentally solved.

The present invention was devised to solve the problems of the prior art as described above, and by configuring the gripper for charging and discharging in a tongs type, it is possible to minimize the contact defect with the electrode lead of the pouch type battery, and the current electrode terminal and voltage By configuring the electrode terminals to contact both sides of the electrode lead of the pouch type battery, the contact reliability can be improved and the contact area can be increased, thereby ultimately improving the charging and discharging efficiency and reliability of the pouch type battery. An object of the present invention is to provide a gripper for charging and discharging.

The component constituting the gripper for charging and discharging of the pouch-type battery according to the present invention proposed to solve the above problems includes a current electrode terminal and a voltage electrode terminal for elastically gripping the electrode lead of the pouch-type battery to provide a pouch-type battery. A gripper for charging and discharging a pouch-type battery for gripping an electrode lead of the pouch-type battery during charging and discharging, comprising: a terminal mounting block formed by coupling a first mounting block and a second mounting block in a clamp-type structure with an elastic force; a pair of voltage electrode terminals protruding from front ends of each of the first and second mounting blocks and disposed to face each other; A pair of current electrode terminals protruding from the front end of each of the first mounting block and the second mounting block and disposed opposite to each other, spaced apart from the voltage electrode terminal, and disposed inside the voltage electrode terminal. characterized by being

Here, each of the voltage electrode terminals is a voltage terminal body that is formed to protrude while being fixedly mounted on the terminal mounting block, a plurality of voltage terminals extending integrally with the voltage terminal body, and separated from each other through a voltage terminal cutout. It characterized in that it comprises an elastic piece, the voltage terminal bent piece formed integrally with each of the voltage terminal elastic piece, bent in the inward direction is formed.

In addition, each of the current electrode terminals is a current terminal body that is formed to protrude while being fixedly mounted on the terminal mounting block, a plurality of current terminals extending integrally with the current terminal body, and separated from each other through a current terminal cutout. It is characterized in that it comprises an elastic piece, the current terminal bending piece formed integrally with each of the current terminal elastic piece, bent in the inward direction is formed.

In addition, it is characterized in that the current terminal flat contact piece for increasing the contact area with the electrode lead of the pouch-type battery is provided on each of the current terminal elastic piece.

According to the present invention, the gripper for charging and discharging a pouch-type battery having the above problems and solutions, since the gripper for charging and discharging is configured as a clamp type, it is possible to minimize contact failure with the electrode lead of the pouch-type battery, and the current Since the electrode terminal and the voltage electrode terminal are configured to contact both sides of the electrode lead of the pouch type battery, it is possible to improve the contact reliability and increase the contact area, thereby ultimately improving the charging/discharging efficiency and reliability. effect occurs.

1 is a schematic perspective view of a conventional gripper for charging and discharging.

2 is a front view of a charging/discharging apparatus for a pouch type battery having a gripper for charging and discharging a pouch type battery according to an embodiment of the present invention.

3 is a partial perspective view of a charging/discharging device for a pouch type battery having a gripper for charging and discharging a pouch type battery according to an embodiment of the present invention.

4 is a plan view of a charging/discharging apparatus for a pouch type battery having a gripper for charging and discharging a pouch type battery according to an embodiment of the present invention.

5 is a perspective view of a gripper for charging and discharging of a pouch-type battery according to an embodiment of the present invention.

6 is a schematic cross-sectional view of a gripper for charging and discharging of a pouch-type battery according to an embodiment of the present invention.

The gripper 50 for charging and discharging the pouch-type battery according to the embodiment of the present invention is provided in the charging/discharging device 100 for the pouch-type battery according to the embodiment of the present invention shown in FIGS. It is electrically connected to the electrode lead of the pouch-type battery mounted on the back so that the pouch-type battery can be charged and discharged.

That is, the gripper 50 for charging/discharging a pouch-type battery according to an embodiment of the present invention may be provided in various charging/discharging devices of a pouch-type battery that may be configured with various structures and technical characteristics, and FIGS. 2 to 4 show A charging/discharging device 100 for a pouch-type battery according to an embodiment is shown, which includes a gripper 50 for charging and discharging a pouch-type battery according to an embodiment of the present invention.

A gripper 50 for charging/discharging a pouch-type battery according to an embodiment of the present invention provided in a charging/discharging device for various pouch-type batteries that may be configured with the various structures and technical characteristics is shown in FIGS. 5 and 6 .

5 and 6, the gripper 50 for charging and discharging a pouch-type battery according to an embodiment of the present invention has a current electrode terminal 30 and a voltage electrode for elastically gripping the electrode lead of the pouch-type battery. The terminal 20 is provided to have a structure capable of performing an operation of gripping the electrode lead of the pouch-type battery during charging and discharging of the pouch-type battery.

The gripper 50 for charging and discharging a pouch-type battery according to the embodiment of the present invention includes a terminal mounting block 10 formed by combining a first mounting block 11 and a second mounting block 13, and the first A pair of voltage electrode terminals 20 respectively coupled to the mounting block 11 and the second mounting block 13, respectively coupled to the first mounting block 11 and the second mounting block 13, the It is configured to include a pair of current electrode terminals 30 disposed inside the voltage electrode terminal 20 .

The terminal mounting block 10 is formed by coupling the first mounting block 11 and the second mounting block 13 in a tongs-like structure with an elastic force. The gripper 50 for charging and discharging of the pouch-type battery according to the embodiment of the present invention adopts and applies a clamp-type structure, unlike the conventional one. To this end, the terminal mounting block 10 is formed by combining the first mounting block 11 and the second mounting block 13 in a tongs-type structure.

Specifically, the first mounting block 11 and the second mounting block 13 are rotatably coupled to each other through a coupling pin 15 to configure the terminal mounting block 10 having a clamp-type structure. And, the first mounting block 11 and the second mounting block 13 are coupled in a state of mutual elasticity to provide the terminal mounting block 10 of a clamp-type structure.

Between the first mounting block 11 and the second mounting block 13 so that the first mounting block 11 and the second mounting block 13 are coupled in a tongs-type structure with mutual elastic force An elastic body (not shown) such as a torsion spring is interposed therebetween. The elastic body (not shown) such as the torsion spring is the first mounting block 11 and the front ends of the second mounting block 13 in a state in which no external force is applied, so that the front ends of the first mounting block 11 and the second mounting block 13 are in a mutually open state or in a mutually adjacent state. It is interposed between the first mounting block 11 and the second mounting block 13 .

That is, the first mounting block 11 and the second mounting block 13 constituting the terminal mounting block 10 are a pair of voltages protrudingly coupled to their respective front ends in a state where no external force is applied. The electrode terminals 20 (a pair of current electrode terminals 30 ) are coupled to each other by an elastic body (not shown) such as the torsion spring and the coupling pins 15 so as to be in a mutually open state or in a mutually adjacent state.

In a state in which no external force is applied, the first mounting block 11 and the second mounting block 13 constituting the terminal mounting block 10 are connected to a pair of voltage electrode terminals 20 (a pair of current If the electrode terminals 30) are combined to be adjacent to each other, the pressure of the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) gripping both sides of the electrode lead of the pouch-type battery. The bearing force is determined by an elastic body such as the torsion spring. In this case, the pressure of the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) for gripping both sides of the electrode lead of the pouch-type battery cannot be adjusted or controlled, resulting in a disadvantage. Also, due to the decrease in the elastic force of the elastic body, which is generated with the increase of the number of times and time of use, the gripping force on the electrode lead of the pouch-type battery is weakened, which causes poor contact with the electrode lead of the pouch-type battery. could be

Due to such a problem, the first mounting block 11 and the second mounting block 13 constituting the terminal mounting block 10 according to the present invention are connected to each other in a state in which no external force is applied. It is preferable that the voltage electrode terminals 20 (a pair of current electrode terminals 30) are coupled so as to be in a state of being spaced apart from each other. In this case, the gripping force of the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) gripping both sides of the electrode lead of the pouch-type battery is based on the external force applied not by the elastic body. is determined by Therefore, the pressure of the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) for gripping both sides of the electrode lead of the pouch-type battery can be adjusted or controlled by an external force applied. . As a result, even if the thickness of the electrode lead of the pouch-type battery is changed or the blotting elastic force of the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) is changed, by an external force, the pouch-type battery The pressure of the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) for gripping both sides of the electrode lead of the battery may be appropriately adjusted or variably controlled.

The external force makes the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) in a state apart from each other in a state where no external force is applied to be adjacent to each other, so that the electrode lead of the pouch-type battery Apply elastic pressure on both sides. The external force can be generated and applied through various configurations and methods as long as the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) can be brought into adjacent states.

For example, in the present invention, as shown in FIG. 6 , to be inserted between the rear ends of each of the first mounting block 11 and the second mounting block 13 constituting the terminal mounting block 10 . An external force can be applied by the clamping inductor 19 disposed. When the clamping derivative 19 is inserted between the rear ends of each of the first mounting block 11 and the second mounting block 13, they are rotatably coupled to each other at each central portion by the coupling pins 15 The rear ends of each of the first mounting block 11 and the second mounting block 13 are spaced apart from each other, whereas the front ends of each of the first mounting block 11 and the second mounting block 13 are adjacent to each other. will do As a result, by the external force of the clamping inductor 19, the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) become adjacent to each other, so that the electrode leads of the pouch-type battery Both sides can be elastically blotted.

The frontal portion of the clamping derivative 19 corresponding to the portion inserted between the rear ends of the first and second mounting blocks 11 and 13, respectively, has a round shape, specifically, the thickness going from the front end to the rear end. It is preferable to have a shape in which the is thickened. In this case, by adjusting or variably controlling the depth of the frontal portion of the clamping derivative 19 inserted between the rear ends of each of the first mounting block 11 and the second mounting block 13, the pair of voltages The degree or distance of mutual proximity of the electrode terminals 20 (a pair of current electrode terminals 30) can be adjusted, and as a result, the pair of voltage electrode terminals 20 gripping both sides of the electrode lead of the pouch-type battery. ) (a pair of current electrode terminals 30) can be appropriately adjusted or variably controlled.

At the rear ends of each of the first mounting block 11 and the second mounting block 13, a first pressing part 12 and a second pressing part ( 14) is provided. That is, the rear end of the first mounting block 11 is provided with a first pressing part 12 that is pressed according to the insertion of the clamping derivative 19, but is not deformed by the insertion pressing, and the second mounting block ( 13) is provided with a second pressing part 14 that is pressed according to the insertion of the clamping derivative 19, but is not deformed according to the insertion pressing.

The first pressing part 12 and the second pressing part 14 allow the clamping derivative 19 to be inserted between the rear ends of the first and second mounting blocks 11 and 13, respectively, more smoothly. It is preferably formed so that it can be rotated in place in order to be able to be inserted. To this end, the first pressing part 12 and the second pressing part 14 are preferably composed of rollers that can rotate in place according to the entry of the clamping derivative 19 .

Meanwhile, a current/voltage cable 17 is connected to the rear end of the first mounting block 11 and the second mounting block 13 constituting the terminal mounting block 10 . The current/voltage cable 17 includes a pair of voltage electrode terminals 20 and a pair of current electrode terminals 30 coupled to the front ends of each of the first mounting block 11 and the second mounting block 13 . ) is electrically connected to That is, the current/voltage cable 17 is connected to each voltage electrode terminal 20 and each current electrode terminal 30 through the inside of each of the first mounting block 11 and the second mounting block 13 . ) and electrically connected.

The voltage electrode terminal 20 is protrudingly coupled to the front end of each of the first mounting block 11 and the second mounting block 13 constituting the terminal mounting block 10, and a pair of voltage electrode terminals ( 20) are disposed to face each other inwardly. That is, the pair of voltage electrode terminals 20 are protruded from the front ends of each of the first mounting block 11 and the second mounting block 13 to face each other.

Here, the inner side means a space in a direction in which the pair of voltage electrode terminals 20 face each other, and the electrode lead of the pouch-type battery is inserted into the inner side, and the pair of voltage electrode terminals 20 and one Both sides are elastically pressed by the pair of current electrode terminals 30 .

In addition, the current electrode terminal 30 is protrudingly coupled to the front end of each of the first mounting block 11 and the second mounting block 13 constituting the terminal mounting block 10, and a pair of current electrodes The terminals 30 are disposed to face each other inwardly, and are disposed inside while being spaced apart from the voltage electrode terminal 20 . That is, the pair of current electrode terminals 30 are protruded from the front ends of each of the first mounting block 11 and the second mounting block 13 and are arranged to face each other, and to the voltage electrode terminal 20 . It is disposed inside the voltage electrode terminal 20 in a spaced apart state.

Here, the inside means a space in which the pair of current electrode terminals 30 face each other, and the electrode lead of the pouch-type battery is inserted into the inside, so that the pair of voltage electrode terminals 20 and one Both sides are elastically pressed by the pair of current electrode terminals 30 .

Each of the pair of current electrode terminals 30 is always spaced apart from the voltage electrode terminal 20 so as not to be short-circuited with the adjacent voltage electrode terminal 20 . In addition, each of the pair of current electrode terminals 30 is disposed inside the adjacent voltage electrode terminals 20 in order to increase the contact area with the electrode lead of the pouch-type battery.

According to the gripper 50 for charging and discharging of the pouch type battery according to the present invention described above, since the gripper 50 for charging and discharging is configured in a tongs type, contact failure with the electrode lead of the pouch type battery can be minimized, and the current Since the electrode terminal 30 and the voltage electrode terminal 20 are configured to be in contact with both sides of the electrode lead of the pouch-type battery, it is possible to improve contact reliability and increase the contact area, which ultimately results in charging and discharging efficiency and reliability can be improved.

On the other hand, the gripper 50 for charging and discharging of the pouch-type battery according to the embodiment of the present invention enables it to adhere to the electrode lead of the pouch-type battery with a strong elastic force, and thereby an oxide film formed on the electrode lead surface of the pouch-type battery A structure is adopted and applied to prevent a contact error occurring when contacting the battery or contacting the non-uniform electrode lead of the pouch-type battery.

To this end, as shown in FIGS. 5 and 6 , each of the pair of voltage electrode terminals 20 according to the present invention, that is, each of the voltage electrode terminals 20 is fixed to the terminal mounting block 10 . A voltage terminal body 21 protruding in a mounted state, a plurality of voltage terminal elastic pieces 23 extending integrally with the voltage terminal body 21 and separated from each other through a voltage terminal cutout 24 . , is formed integrally with each of the voltage terminal elastic pieces 23, and includes a voltage terminal bent piece 25 formed by being bent in an inward direction.

The voltage terminal body 21 is formed to protrude while being fixedly mounted to the terminal mounting block 10 . That is, the voltage terminal body 21 of the voltage electrode terminal 20 protrudingly coupled from the front end of the first mounting block 11 is formed to protrude while being fixedly mounted to the first mounting block 11 , The voltage terminal body 21 of the voltage electrode terminal 20 protruded from the front end of the second mounting block 13 is protruded while being fixedly mounted to the second mounting block 13 . Each of the voltage terminal bodies 21 is fixedly mounted while being inserted into the terminal mounting block 10 , and is mounted to be electrically connected to the above-described current/voltage cable 17 .

The plurality of voltage terminal elastic pieces 23 are integrally formed with the voltage terminal body 21 coupled to the first mounting block 11 and the second mounting block 13, respectively, and are formed with voltage terminal cutouts. (24) is formed through mutual separation. Since the plurality of voltage terminal elastic pieces 23 are spaced apart from each other through the voltage terminal cutout 24 , they are elastically integrally coupled to the voltage terminal body 21 . As a result, the coupling structure of the voltage terminal body 21 and the plurality of voltage terminal elastic pieces 23 has a rake-shaped structure.

The voltage terminal bent piece 25 is formed integrally with each of the voltage terminal elastic pieces 23 formed separately from each other, and is bent inwardly. Since the voltage terminal bent pieces 25 are integrally formed with the respective voltage terminal elastic pieces 23 that are formed to be separated from each other, they are also formed in plurality and are formed to be separated from each other. Accordingly, the plurality of voltage terminal bent pieces 25 are also elastically integrally coupled to the voltage terminal body 21 via the voltage terminal elastic piece 23 . As a result, the coupling structure of the voltage terminal body 21 , the plurality of voltage terminal elastic pieces 23 and the voltage terminal bent piece 25 has a more complete rake-shaped structure.

Since the voltage terminal bent piece 25 is formed by being bent inwardly from the end of each voltage terminal elastic piece 23, it is in a state of being elastically integrally coupled to the voltage terminal elastic piece 23, and further Furthermore, it is in a state of being elastically and integrally coupled to the voltage terminal body 21 via the voltage terminal elastic piece 23 .

Since the voltage terminal bent piece 25 is formed by being bent inwardly from the end of each voltage terminal elastic piece 23 , a pair of voltage terminal bent pieces 25 , that is, the first mounting block 11 . The voltage terminal bent piece 25 constituting the voltage electrode terminal 20 coupled to ) and the voltage terminal bent piece 25 constituting the voltage electrode terminal 20 coupled to the second mounting block 13 are inside are arranged opposite each other in the direction.

The end of the voltage terminal bent piece 25 is preferably formed in a sawtooth shape. Since an oxide film may be formed on the electrode lead surface of the pouch-type battery, it is preferable that the end of the voltage terminal bent piece 25 has a sawtooth shape so as to pass through the oxide film. Accordingly, charging and discharging may be performed in a state in which resistance is minimized without generating a contact error.

On the other hand, if the voltage terminal bent piece 25 can be integrally formed by bending inwardly from the end of the voltage terminal elastic piece 23, the bending angle with respect to the voltage terminal elastic piece 23 needs to be limited. there is no However, while considering maintaining the elastic force of the voltage terminal bent piece 25, the current electrode terminal 30, specifically the current terminal bent piece ( 35), the bending angle θ of the voltage terminal bending piece 25 with respect to the voltage terminal elastic piece 23 is in the range of 90˚ or more and 110˚ or less (90˚ ≤ θ ≤ 110). ˚), and most preferably in the range of 95˚ or more and 100˚ or less (95˚ ≤ θ ≤ 100˚).

On the other hand, each of the pair of current electrode terminals 30 according to the present invention, that is, each of the current electrode terminals 30 . 5 and 6, the current terminal body 31 is formed to protrude in a state of being fixedly mounted on the terminal mounting block 10, and the current terminal body 31 is formed to extend integrally with the current terminal. A plurality of current terminal elastic pieces 33 formed to be separated from each other through the cutout 34, the current terminal bending pieces 35 formed integrally with each of the current terminal elastic pieces 33 and formed by bending inwardly ) is included.

As described above, since the current electrode terminal 30 is disposed inside the voltage electrode terminal 20 in a state that is always spaced apart from the voltage electrode terminal 20, the current electrode terminal 30 is The current terminal body 31 , the plurality of current terminal elastic pieces 33 , and the current terminal bent piece 35 are the voltage terminal body 21 and the plurality of voltage terminals constituting the voltage electrode terminal 20 corresponding to each other. It is disposed inside the elastic piece 23 and the voltage terminal bent piece 25 in a spaced apart state.

The current terminal body 31 is formed to protrude while being fixedly mounted to the terminal mounting block 10 . That is, the current terminal body 31 of the current electrode terminal 30 protrudingly coupled from the front end of the first mounting block 11 is formed to protrude in a state of being fixedly mounted to the

first mounting block

11 , 2 The current terminal body 31 of the current electrode terminal 30 protrudingly coupled from the front end of the mounting block 13 is formed to protrude while being fixedly mounted to the second mounting block 13 . Each of the current terminal body 31 is fixedly mounted while being inserted into the terminal mounting block 10 , and is mounted to be electrically connected to the above-described current/voltage cable 17 .

The plurality of current terminal elastic pieces 33 are integrally formed with the current terminal body 31 coupled to the first mounting block 11 and the second mounting block 13, respectively, and the current terminal cutout portion 34 through mutual separation is formed. Since the plurality of current terminal elastic pieces 33 are spaced apart from each other through the current terminal cutout 34 , they are elastically integrally coupled to the current terminal body 31 . As a result, the coupling structure of the current terminal body 31 and the plurality of current terminal elastic pieces 33 has a rake-shaped structure.

The current terminal bent piece 35 is formed integrally with each of the current terminal elastic pieces 33 formed separately from each other, and is bent inwardly. Since the current terminal bent pieces 35 are integrally formed with the respective current terminal elastic pieces 33 that are formed to be separated from each other, they are also formed in plurality and are formed to be separated from each other. Accordingly, the plurality of current terminal bent pieces 35 are also elastically integrally coupled to the current terminal body 31 via the current terminal elastic pieces 33 . As a result, the coupling structure of the current terminal body 31 , the plurality of current terminal elastic pieces 33 and the current terminal bent piece 35 has a more complete rake-shaped structure.

Since the current terminal bent piece 35 is formed by being bent inwardly from the end of each current terminal elastic piece 33, it is in a state of being elastically integrally coupled to the current terminal elastic piece 33, and further Furthermore, it is in a state of being elastically integrally coupled to the current terminal body 31 via the current terminal elastic piece 33 .

Since the current terminal bent piece 35 is formed by being bent inwardly at the end of each of the current terminal elastic piece 33 , a pair of current terminal bent pieces 35 , that is, the first mounting block 11 . ) The current terminal bent piece 35 constituting the current electrode terminal 30 coupled to and the current terminal bent piece 35 constituting the current electrode terminal 30 coupled to the second mounting block 13 are inside are arranged opposite each other in the direction.

The end of the current terminal bent piece 35 is preferably formed in a sawtooth shape. Since an oxide film may be formed on the electrode lead surface of the pouch-type battery, it is preferable that the end of the current terminal bent piece 35 has a sawtooth shape so as to pass through the oxide film. Accordingly, charging and discharging may be performed in a state in which resistance is minimized without generating a contact error.

On the other hand, if the current terminal bending piece 35 can be formed integrally by being bent inwardly from the end of the current terminal elastic piece 33, the bending angle with respect to the current terminal elastic piece 33 needs to be limited. there is no However, while considering maintaining the elastic force of the current terminal bent piece 35, the voltage electrode terminal 20, specifically the voltage terminal bent piece ( 25), the bending angle θ of the current terminal bent piece 35 with respect to the current terminal elastic piece 33 is determined by the voltage terminal bent piece with respect to the voltage terminal elastic piece 23. It is preferably the same as the bending angle θ of (25). That is, the bending angle θ of the current terminal bent piece 35 with respect to the current terminal elastic piece 33 is preferably in the range of 90˚ to 110˚ (90˚ ≤ θ ≤ 110˚), and 95˚ It is most preferable that the range is greater than or equal to 100˚ (95˚ ≤ θ ≤ 100˚).

On the other hand, it is preferable that the current terminal bent piece 35 protrudes less inwardly than the voltage terminal bent piece 25 . That is, the voltage terminal bent piece 25 is formed to protrude further inward than the current terminal bent piece 35 . Therefore, in the process of elastically gripping both sides of the electrode lead of the pouch-type battery by the pair of voltage electrode terminals 20 and the pair of current electrode terminals 30, the voltage terminal bent piece is preferentially disposed outside. (25) is bent outward to elastically grip the electrode lead of the pouch-type battery, and then, in the process in which the voltage terminal bent piece 25 is bent outward, the current terminal bent piece 35 is the electrode of the pouch-type battery. The electrode lead of the pouch-type battery can be elastically gripped while being bent outward while in contact with the lead.

On the other hand, in the present invention, by providing the current terminal flat contact piece 37 on the current terminal elastic piece 33 of the current electrode terminal 30, the contact area with the electrode lead of the pouch-type battery can be further increased, Due to this, the contact resistance can be reduced, the amount of heat generated during charging and discharging can be reduced, and as a result, the structure of the gripper 50 for charging and discharging of the pouch type battery can be adopted to further improve the charging and discharging efficiency.

To this end, as shown in FIGS. 5 and 6 , a current terminal flat contact piece 37 for increasing the contact area with the electrode lead of the pouch-type battery is provided on each of the current terminal elastic pieces 33 . do.

As described above, since the current electrode terminal 30 and the voltage electrode terminal 20 according to the present invention are configured to contact both sides of the electrode lead of the pouch-type battery, the contact reliability can be improved, and compared to the conventional The contact area can be increased. However, in the present invention, in order to further improve the charging/discharging efficiency by further increasing the contact area with the electrode lead of the pouch-type battery, the current terminal flat contact piece 37 is formed on each of the current terminal elastic pieces 33 . The configuration provided is additionally adopted and applied.

The current terminal flat contact piece 37 is not formed on the current terminal body 31 to elastically grip the electrode lead of the pouch-type battery, but is formed on the current terminal elastic piece 33 . In order to form the current terminal flat contact piece 37 on the current electrode terminal 30 , specifically, the current terminal elastic piece 33 , the current electrode terminal 30 is positioned inside the voltage electrode terminal 20 . It will adopt and apply the structure arranged in

On the inner side surface of the current terminal planar contact piece 37 (the side opposite to each other a pair of current terminal planar contact surfaces 37 respectively formed on the pair of mutually opposing current terminal elastic pieces 33), a plurality of It is preferable that the projection is formed. Since an oxide film may be formed on the electrode lead surface of the pouch-type battery, it is preferable that a plurality of protrusions are formed on the inner surface of the current terminal flat contact piece 37 so as to pass through the oxide film. Accordingly, charging and discharging may be performed in a state in which resistance is minimized without generating a contact error.

On the other hand, it is preferable that the current terminal flat contact piece 37 protrudes inward less than the current terminal bent piece 35 . That is, the current terminal bent piece 35 is formed to protrude further inward than the current terminal flat contact piece 37 . Therefore, in the process of elastically gripping both sides of the electrode lead of the pouch-type battery by the pair of voltage electrode terminals 20 and the pair of current electrode terminals 30, the voltage terminal bent piece is preferentially disposed outside. (25) is bent outward to elastically grip the electrode lead of the pouch-type battery, and then, in the process in which the voltage terminal bent piece 25 is bent outward, the current terminal bent piece 35 is the electrode of the pouch-type battery. The electrode lead of the pouch-type battery can be elastically gripped while in contact with the lead and bent outward, and then, in the process of the current terminal bending piece 35 being bent outward, the current terminal flat contact piece 37 becomes the pouch. It can be elastically blotted by contacting the electrode lead of a battery-type battery.

Next, a charging/discharging device for a pouch-type battery including the gripper 50 for charging and discharging a pouch-type battery having the above-described configuration and operation will be schematically described.

The charging/discharging device 100 for a pouch-type battery according to an embodiment of the present invention is a device for performing an activation process for a pouch-type battery, that is, a charging/discharging process, and is electrically connected to the electrode lead of the mounted pouch-type battery to connect the pouch-type battery. The operation of charging and discharging the type battery is performed.

The charging/discharging device 100 for a pouch-type battery according to an embodiment of the present invention includes a current electrode terminal and a voltage electrode terminal that are elastically gripped by the electrode lead of the pouch-type battery, and the pouch-type battery is charged and discharged during charging and discharging. A gripper for charging and discharging a pouch-type battery that is gripped by an electrode lead of the battery is provided. Here, the gripper 50 for charging and discharging of the pouch-type battery follows the above-described configuration and operation.

As described above, the gripper 50 for charging and discharging the pouch type battery provided in the charging/discharging device 100 for the pouch type battery according to the embodiment of the present invention includes the first mounting block 11 and the second mounting block 11 , as described above. The terminal mounting block 10, the first mounting block 11 and the second mounting block 13 formed by being coupled in a clamp-type structure in a state in which the block 13 has an elastic force, is protruded from the front end of each of the mounting blocks 13 and is mutually coupled to each other A pair of opposing voltage electrode terminals 20 and the first mounting block 11 and the second mounting block 13 are respectively protruded from the front ends and arranged to face each other, the voltage electrode terminal 20 It is configured to include a pair of current electrode terminals 30 disposed inside the voltage electrode terminal 20 in a spaced apart state.

Since the gripper 50 for charge/discharge of the pouch-type battery follows the above-described configuration and operation, a detailed description of the gripper 50 for charge/discharge of the pouch-type battery will be omitted below, and the pouch according to the embodiment of the present invention will be omitted. Other configurations and operations constituting the charging/discharging device 100 of the type battery will be schematically described.

2 to 4 , the charging/discharging apparatus 100 for a pouch-type battery according to an embodiment of the present invention includes a gripper 50 for charging and discharging a plurality of pouch-type batteries, and a plurality of pouch-type batteries. A gripper support block 60 that fixedly supports the gripper 50 for charging and discharging so that it is continuously arranged in the horizontal direction, and a transfer block 70 that is transported according to a driving force while supporting the gripper support block 60 in the vertical direction , a driving module 80 for horizontally reciprocating the transfer block 70, and a tray holder 90 for seating and supporting a tray 95 for mounting and fixing a plurality of pouch-type batteries.

The grippers 50 for charging and discharging of the plurality of pouch-type batteries are spaced apart from each other at equal intervals in the horizontal direction. The gripper support block 60 fixedly supports the grippers 50 for charging and discharging the plurality of pouch-type batteries. The gripper support block 60 fixedly supports the grippers 50 for charging and discharging of the plurality of pouch-type batteries, and applies an external force to each of the grippers 50 for charging and discharging of the plurality of pouch-type batteries to apply the above-described pair of voltages. The electrode leads of the pouch-type battery disposed between the electrode terminals 20 (a pair of current electrode terminals 30) are inserted into a pair of voltage electrode terminals 20 (a pair of current electrode terminals 30). ) is provided with a pressing module (not shown) so that it can be elastically blotted.

The pressing module may include the above-described clamping derivative 19 and a driving body (not shown) such as a cylinder that drives the clamping derivative 19 to move forward or backward.

The transfer block 70 supports the gripper support block 60 in a vertical direction, and horizontally reciprocates, specifically, forwards or backwards according to the driving of the driving module 80 . The forward or backward movement of the transport block 70 is performed by the driving module 80 . That is, the driving module 80 may drive the transport block 70 to move forward or backward, and as a result, the gripper support block 60 supported and coupled to the transport block 70 and a plurality of support blocks supported thereon. The gripper 50 for charging and discharging the pouch-type battery may also be moved forward or backward.

The gripper 50 for charging and discharging of the plurality of pouch-type batteries performs an operation of gripping both sides of electrode leads of the plurality of pouch-type batteries mounted and fixed to the tray 95 . A plurality of pouch-type batteries are mounted and fixed to the tray 95 so as to correspond one-to-one to the grippers 50 for charging and discharging of the pouch-type batteries. The tray 95 is seated on the tray holder 90 provided in front of the gripper 50 for charging and discharging the plurality of pouch-type batteries. The tray mount 90 is preferably formed so as to be seated by guiding the lower four corners of the tray 95 .

The gripper 50, the gripper support block 60, the transfer block 70, and the driving module 80 for charging/discharging of the plurality of pouch-type batteries described above constitute a unit charging/discharging unit. That is, the unit charging/discharging unit includes the aforementioned gripper 50 for charging and discharging the plurality of pouch-type batteries, the gripper support block 60 , the transfer block 70 , and the driving module 80 .

A process and operation for charging and discharging the pouch-type battery stably mounted on the tray 95 through the unit charging/discharging unit will be schematically described as follows.

The tray 95 in which a plurality of pouch-type batteries are stably mounted while being spaced apart from each other at equal intervals is seated on the tray holder 90 . The plurality of pouch-type batteries are mounted on the tray 95 such that electrode leads are arranged in a lateral direction, specifically, in a direction toward the gripper 50 for charging and discharging of the pouch-type battery.

Next, by driving the grippers 50 for charging and discharging of the plurality of pouch-type batteries forward, a pair of voltage electrodes of the grippers 50 for charging and discharging of the pouch-type batteries corresponding to one-to-one electrode leads of the pouch-type batteries It is placed between the terminals 20 (a pair of current electrode terminals 30 ).

To this end, the driving module 80 drives the transfer block 70 to advance in the direction of the tray 95 . Then, as the transfer block 70 advances, the gripper support block 60 also advances, and as a result, the gripper 50 for charging and discharging the plurality of pouch-type batteries supported by the gripper support block 60 is It advances to a position where the electrode leads of the plurality of pouch-type batteries mounted on the tray 95 can be clamped. At this time, the electrode lead of the pouch-type battery is disposed between a pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) constituting the gripper 50 for charging and discharging each pouch-type battery. .

Thereafter, by applying an external force to each of the charge/discharge grippers 50 of the plurality of pouch-type batteries, the charge/discharge grippers 50 of each pouch-type battery elastically grip and clamp the electrode leads of the corresponding pouch-type batteries. let it be As described above, the external force may be performed by driving the clamping inductor 19 forward. When the electrode leads of the plurality of pouch-type batteries are elastically gripped and clamped by the gripper 50 for charging and discharging the plurality of pouch-type batteries, charging and discharging of the plurality of pouch-type batteries is performed according to a predetermined procedure. do.

In the process of performing the charging and discharging, there is a need to detect whether an abnormality that may occur during the charging and discharging process. That is, it is preferable that a temperature sensor for detecting heat that may be abnormally generated in the charging/discharging process and a smoke sensor for detecting abnormal fire are provided in the unit charging/discharging unit. That is, it is preferable to provide the temperature sensor to detect the heat generated by the gripper due to contact failure and resistance increase in the charging/discharging process, and further, to provide a smoke detection sensor for quick response in case of a fire due to overheating It is preferable to do

In particular, as shown in FIGS. 2 to 4 , in order to effectively detect the heat generated by the gripper, the temperature sensor is adjacent to the gripper 50 for charging and discharging the plurality of pouch-type batteries and the gripper support block 60 ) is preferably disposed on.

On the other hand, the tray 95 seated on the tray holder 90 may be seated out of alignment, and in this state, when the grippers 50 for charging and discharging of the plurality of pouch-type batteries are advanced, the The electrode lead of the pouch-type battery cannot be correctly inserted between the pair of voltage electrode terminals 20 (a pair of current electrode terminals 30) constituting the gripper 50 for charging and discharging of the corresponding pouch-type battery and is misaligned. state can be

In order to prevent such misalignment, a pair of tray guides 63 capable of guiding both sides of the tray 95 in contact while advancing the grippers 50 for charging and discharging the plurality of pouch-type batteries are provided. It is fixedly disposed on both sides of the unit charging/discharging unit, specifically, on both sides of the gripper support block 60 .

The unit charging/discharging unit described above enables the charging/discharging process to be performed by clamping the electrode lead of the pouch type battery only in one direction of the pouch type battery. Therefore, when the charging/discharging process for the pouch-type battery is performed using only one charging/discharging unit as described above, the charging/discharging process for the pouch-type battery in which both the positive electrode lead and the negative electrode lead are formed on one side is performed. in case it is performed.

However, in the case of the pouch-type battery, electrode leads are formed on both sides, respectively. That is, a pouch-type battery in which a positive electrode lead is formed on one side of the pouch-type battery and a negative electrode lead is formed on the other side of the pouch-type battery may be applied.

In order to perform a charging/discharging process for a pouch-type battery in which electrode leads are formed on both sides, the charging/discharging device 100 for a pouch-type battery according to the present invention comprises the above-described unit charging/discharging unit as a pair. Specifically, a pair of charging/discharging units are disposed to face each other, and the tray 95 may be seated therebetween.

Therefore, in order to charge/discharge a pouch-type battery having electrode leads respectively formed on both sides thereof in a state in which it is mounted on the tray 95, all of the unit charge/discharge units disposed on both sides of the tray 95 are used in the tray ( 95), the charge/discharge grippers 50 of each of the plurality of pouch-type batteries constituting the charge/discharge units on both sides clamp the electrode leads formed on both sides of the pouch-type battery while charging Allow the discharge process to be performed. In this case, each unit charging/discharging unit also performs the same operation as the above-described unit charging/discharging unit.

Meanwhile, FIGS. 2 and 3 illustrate that the pair of unit charge/discharge units is configured in multiple stages, specifically, two layers. In this case, the tray 95 is also stacked in multiple stages, specifically, two layers. The charging/discharging device for a pouch-type battery having such a configuration may perform a charging/discharging process in a state in which a plurality of pouch-type batteries forming electrode leads on both sides are disposed in multiple stages, specifically, in two layers. As a result, the charging/discharging process can be simultaneously performed for more pouch-type batteries.

The charging/discharging device of the pouch-type battery may be configured by arranging the pair of charging/discharging units in two layers, as illustrated in FIGS. You may. As shown in FIGS. 2 and 3 , when a pair of unit charge/discharge units are arranged in two layers, the tray guide 63 is fixedly disposed between the unit charge/discharge units arranged up and down, respectively. desirable.

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent ranges of embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

The gripper for charging and discharging of the pouch-type battery according to the present invention has industrial applicability to minimize contact failure with the electrode lead of the pouch-type battery because the gripper for charging and discharging is configured as a clamp type.

Claims

In the charging/discharging gripper of a pouch-type battery, comprising a current electrode terminal and a voltage electrode terminal for elastically gripping the electrode lead of the pouch-type battery, the gripper for gripping the electrode lead of the pouch-type battery during charging and discharging of the pouch-type battery,

a terminal mounting block formed by coupling the first mounting block and the second mounting block in a tongs-like structure with an elastic force;

a pair of voltage electrode terminals protruding from front ends of each of the first and second mounting blocks and disposed to face each other;

A pair of current electrode terminals protruding from the front end of each of the first mounting block and the second mounting block and disposed opposite to each other, spaced apart from the voltage electrode terminal, and disposed inside the voltage electrode terminal. A gripper for charging and discharging a pouch-type battery, characterized in that it becomes
The method according to claim 1,

Each of the voltage electrode terminals includes a voltage terminal body which is formed to protrude while being fixedly mounted on the terminal mounting block, and a plurality of voltage terminal elastic pieces formed integrally with the voltage terminal body and separated from each other through a voltage terminal cutout. , A gripper for charging and discharging a pouch-type battery, characterized in that it is integrally formed with each of the voltage terminal elastic pieces, and includes a voltage terminal bent piece formed by bending inward.
The method according to claim 1,

Each of the current electrode terminals is a current terminal body which is formed to protrude in a state of being fixedly mounted on the terminal mounting block, and a plurality of current terminal elastic pieces formed to extend integrally with the current terminal body and separated from each other through a current terminal cutout. , A gripper for charging and discharging a pouch-type battery, characterized in that it is formed integrally with each of the current terminal elastic pieces, and includes a current terminal bent piece formed by being bent in an inward direction.
4. The method according to claim 3,

A gripper for charging and discharging a pouch-type battery, characterized in that a current terminal flat contact piece for increasing a contact area with an electrode lead of the pouch-type battery is provided on each of the current terminal elastic pieces.