KR20210136604A - Foldable cell jig, battery module and secondary battery evaluation apparatus including the same - Google Patents

Abstract

A cell cartridge, a battery module including the same, a cell jig including the same, and a secondary battery evaluation device including the cell jig according to the present invention include the cell jig having a foldable structure, so that storage and stacking of battery cells are convenient, and temperature behavior or performance evaluation of a secondary battery module can be easily performed.

Description

FOLDABLE CELL JIG, BATTERY MODULE AND SECONDARY BATTERY EVALUATION APPARATUS INCLUDING THE SAME}

The present invention relates to a foldable cell jig, a battery module including the same, and a secondary battery evaluation device.

Recently, the price of energy sources due to the depletion of fossil fuels, interest in environmental pollution is increasing, and the demand for eco-friendly alternative energy sources is becoming an indispensable factor for future life. Accordingly, research on various power production technologies, such as nuclear power, solar power, wind power, and tidal power, continues, and power storage devices for using the generated energy more efficiently are also of great interest.

In particular, as technology development and demand for mobile devices increase, the demand for batteries as an energy source is rapidly increasing, and thus, research on batteries capable of meeting various needs is being conducted.

Representatively, in terms of battery shape, there is a high demand for prismatic secondary batteries and pouch-type secondary batteries that can be applied to products such as mobile phones with thin thickness, and in terms of materials, advantages such as high energy density, discharge voltage, and output stability are high. Demand for lithium secondary batteries such as lithium ion batteries and lithium ion polymer batteries is high.

A secondary battery is manufactured by accommodating an electrode assembly in a battery case, injecting an electrolyte, and then activating the battery. In this case, the battery activation step includes a process of charging and discharging the secondary battery under conditions necessary for activation after the secondary battery is mounted on the cell jig. Such a cell jig is mainly used for charging or discharging a secondary battery in the battery activation step, and is also used for performance evaluation of the secondary battery.

1 is a schematic diagram of a conventional cell jig for evaluation of secondary battery performance. As shown in FIG. 1 , the conventional cell jig 10 presses and fixes the battery cell 11 through the upper plate 12 and the lower plate 13 respectively positioned in the upper and lower portions. Also, the electrode leads of the battery cells 11 protrude from one side or both sides of the cell jig 10 .

On the other hand, in this cell jig 10, in order to fix the battery cell 11, it is necessary to perform bolt fastening using a separate bolt 14 and a nut 15 penetrating the upper plate 12 and the lower plate 13. There is a problem that it is cumbersome, and it is not easy to electrically connect to the fixed battery cell 11 . Moreover, when the evaluation target or condition is changed, there is a limitation in that the process of re-fastening after releasing the fastening between the bolt 14 and the nut 15 is complicated and cumbersome.

Korean Patent Publication No. 2018-0100748

The present invention provides a folding type cell jig, a battery module including the same, and a secondary battery evaluation device in order to solve the problems of the prior art.

The present invention relates to a foldable cell jig for accommodating a battery cell. In one example, the foldable cell jig according to the present invention is formed in a frame structure surrounding four sides of a battery cell, a first electrode lead receiving portion is formed in one direction, and a second electrode lead receiving portion is formed in the other direction n cell cartridges formed (n is an integer greater than or equal to 2); a hinge formed on both sides of the cell cartridge and formed in a region forming a vertical direction with the first and second electrode lead receiving portions to connect the n cell cartridges to each other; and a terminal accommodating part formed at the ends of the first and second electrode lead accommodating parts, in which terminals of bus bars or insulating bars are accommodated, wherein the n cell cartridges are a k th cell cartridge (k is 1 or more, an integer less than or equal to n-1) has a structure in which one surface of the k+1-th cell cartridge is folded to be adjacent to each other.

In one example, the hinge may include a shaft pipe installed on one surface of one end of the cell cartridge and the other surface of the other end of the cell cartridge; and a coupling pin passing through the shaft tube and coupling the cell cartridges adjacent to each other.

In a specific example, the hinge includes a first shaft pipe installed on one surface of one end of the cell cartridge and a second shaft pipe installed on the other surface of the other end of the cell cartridge, wherein the first shaft pipe and the second shaft pipe are alternately arranged and the first shaft tube of the k+1th cell cartridge has a structure coupled to the first shaft tube of the kth cell cartridge.

In one example, the cell cartridge has a structure in which fixing protrusions for fixing the battery cells are formed in areas adjacent to the battery cells on both inner surfaces of the battery cell accommodating part, and the protrusions on the other surface of one end and one surface of the other end, respectively It has a structure including a support in the form of a support.

In one example, the terminal accommodating part has a structure in which a protrusion or a groove is formed, and the terminal has a structure in which a protrusion or a groove or a protrusion corresponding to the protrusion or the groove of the terminal accommodating part is formed in a region in contact with the terminal accommodating part.

In another example, the terminal accommodating part may include: a first terminal accommodating part in which terminals in contact with one surface of the first and second electrode leads are accommodated; and a second terminal accommodating part in which terminals contacting the other surfaces of the first and second electrode leads are accommodated.

In this case, the terminal has a structure in which two terminal ends are connected to each other to form a pair, and the pair of terminals are hinged to each other and folded. In a specific example, the pair of terminals has a structure accommodated in the first or second terminal accommodating portion of the two cell cartridges that are folded to be adjacent to each other.

In one example, the foldable cell jig according to the present invention, each battery cell is accommodated in n cell cartridges, a bus bar is accommodated in the first terminal accommodating portion of one side of each cell cartridge, the number of first terminals on the other side The insulation bar is accommodated in the payment, the insulation bar is accommodated in the second terminal receiving part of one side of the n cell cartridges, and the bus bar is accommodated in the second terminal receiving part of the other side. In a specific example, the n cell cartridges are folded by a hinge to form a cartridge stack, and the battery cells accommodated in the n cell cartridges have a structure in which the first electrode leads and the second electrode leads are alternately arranged based on the stacking direction. has

In another example, the foldable cell jig according to the present invention has a structure in which battery cells are accommodated in n cell cartridges, respectively, and busbars are accommodated in first and second terminal receiving portions of each cell cartridge. In a specific example, the n cell cartridges are folded by a hinge to form a cartridge stack, and the first and second electrode leads of the k-th battery cell housed are the first and second electrode leads of the k+1-th battery cell housed, respectively. It has a structure positioned in the same direction as the two electrode leads.

In addition, the present invention provides a battery module including the above-described cell jig. In one example, the cell jig according to the present invention includes a cartridge stack in which n cell cartridges are stacked.

In addition, the present invention provides a secondary battery evaluation device including the above-described cell jig. For example, the secondary battery evaluation apparatus may evaluate a temperature behavior according to charging and discharging of a battery cell.

The foldable cell jig according to the present invention, a battery module and a secondary battery evaluation device including the same, include the cell jig of the foldable structure, so that storage and stacking of battery cells is convenient, and the temperature behavior and performance of the secondary battery module The evaluation can be easily performed.

1 is a schematic diagram of a conventional cell jig for evaluation of secondary battery performance.
2 to 3 are perspective views of a cell jig of the folding type according to an embodiment of the present invention.
Figure 4 is a detailed view showing the cell cartridge of the cell jig of the folding type according to an embodiment of the present invention.
5 is a view showing one side of a folding cell jig according to an embodiment.
6 is a detailed view showing a terminal of a folding type cell jig according to an embodiment of the present invention.
7 is a perspective view showing a cartridge stack in which a folding cell jig is vertically stacked according to an embodiment of the present invention.
8 is a view showing a process of using a cell cartridge according to an embodiment of the present invention.
9 is a cross-sectional view illustrating a series-connected state of a plurality of battery cells accommodated in a foldable cell jig according to an embodiment of the present invention.
10 is a cross-sectional view illustrating a parallel connection state of a plurality of battery cells accommodated in a folding-type cell jig according to another embodiment of the present invention.
11 is a view showing a series-connected state of a plurality of battery cells accommodated in a folding-type cell jig according to an embodiment of the present invention.
12 is a diagram illustrating a parallel-connected state of a plurality of battery cells accommodated in a folding-type cell jig according to another embodiment of the present invention.

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof. Also, when a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where it is "directly on" another part, but also the case where another part is in the middle. Conversely, when a part of a layer, film, region, plate, etc. is said to be “under” another part, this includes not only cases where it is “directly under” another part, but also cases where another part is in between. In addition, in the present application, “on” may include the case of being disposed not only on the upper part but also on the lower part.

The present invention relates to a foldable cell jig, a battery module including the same, and a secondary battery evaluation device.

The cell jig according to the present invention includes n cell cartridges accommodating battery cells, and the n cell cartridges have a structure connected to each other by a hinge. In particular, the n cell cartridges have a structure in which one surface of the k-th cell cartridge is folded to be adjacent to one surface of the k+1-th cell cartridge by a hinge connection.

In general, the cell jig presses and fixes the battery cell through the upper plate and the lower plate respectively located in the upper and lower parts. In this case, in order to fix the battery cell, there is a problem in that it is inconvenient to perform bolt fastening using a separate bolt and nut penetrating the upper plate and the lower plate, and electrical connection to the fixed battery cell is not easy. have. Moreover, when the evaluation target or condition is changed, there is a limitation in that the process of releasing the fastening between the bolt and the nut and then fastening it again is complicated and cumbersome.

Accordingly, the present invention provides a foldable cell jig, a battery module including the same, and a secondary battery evaluation device, which is convenient for storing and stacking battery cells, and for easily performing temperature behavior and performance evaluation of the secondary battery module. .

Hereinafter, a folding-type cell jig according to the present invention, a battery module including the same, and a secondary battery evaluation device will be described in detail with reference to FIGS. 2 to 12 . In describing each figure, like reference numerals have been used for like elements. In the accompanying drawings, the dimensions of the structures are enlarged than the actual size for clarity of the present invention. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The singular expression includes the plural expression unless the context clearly dictates otherwise.

2 to 3 are perspective views of a cell jig of the folding type according to an embodiment of the present invention.

2 to 3, the folding-type cell jig 10 according to an embodiment of the present invention includes a cell cartridge 100, and the cell cartridge 100 is a battery cell 11 ) is configured to include a battery cell accommodating part 110 , a hinge 120 connecting the plurality of cell cartridges 100 to each other, and a terminal accommodating part 130 for accommodating terminals of bus bars or insulating bars.

In one example, the foldable cell jig 10 according to the present invention includes n cell cartridges 100 (n is an integer of 2 or more). The cell cartridge 100 is formed in a frame structure surrounding the four sides of the battery cell 11, the first electrode lead receiving portion 111 in which the first electrode lead is accommodated in one direction is formed, and in the other direction. A second electrode lead receiving portion 112 in which the second electrode lead is accommodated is formed. In addition, end portions of the first and second electrode lead accommodating parts 111 and 112 include a terminal accommodating part 130 in which a terminal 140 such as a bus bar or an insulating bar is accommodated.

In one example, the foldable cell jig 10 according to the present invention includes a hinge 120 for connecting the n cell cartridges 100 to each other. In a specific example, the hinge 120 is positioned on both sides of the cell cartridge 100 , and is formed in an area perpendicular to the first and second electrode lead accommodating parts 111 and 112 .

At this time, the n number of cell cartridges 100, one surface of the k-th cell cartridge 100 (k is an integer greater than or equal to 1, n-1 or less) by the hinge 120 connection is the k+1-th cell cartridge 100 ) and has a structure that is folded so as to be adjacent to each other. For example, if k is 2 or more, the n number of cell cartridges 100, one surface of the k-th cell cartridge 100 by the connection of the hinge 120 is one surface of the k+1-th cell cartridge 100 and each other folded to be adjacent. In addition, the other surface of the k-th cell cartridge 100 is folded to be adjacent to the other surface of the k-1 th cell cartridge 100 . That is, the foldable cell jig 10 of the present invention according to one embodiment may have a folding screen structure.

In one example, the hinge 120 is configured to include a shaft tube 121 and a coupling pin 122 . The hinge 120 penetrates through the shaft tube 121 and the shaft tube 121 installed on one surface of one end of the cell cartridge 100 and the other surface of the other end of the cell cartridge 100, thereby coupling the neighboring cell cartridges 100 to each other. It is configured to include a pin (122). The shaft tube 121 may mean a tube shape in which a hollow is formed.

In another example, the shaft tube 121 includes a first shaft tube 1211 and a second shaft tube 1212 . In a specific example, the first shaft tube 1211 is formed on one surface of one end of the cell cartridge 100 , and the second shaft tube 1212 is installed on the other surface of the other end of the cell cartridge 100 . In this case, the first shaft tube 1211 and the second shaft tube 1212 may be alternately arranged. On the other hand, as described above, the first shaft tube 1211 and the second shaft tube 1212 are perpendicular to the position where the first and second electrode lead receiving portions 111 and 112 are formed in the cell cartridge 100 . It may be formed in a vertical direction to the forming region.

Furthermore, the first shaft tube 1211 of the k+1th cell cartridge 100 may be coupled to the k-th first shaft tube 1211 . For example, when the first shaft tube 1211 is positioned on the front side of the left end of the k and k+1th cell cartridge 100 and the second shaft tube 1212 is positioned on the rear surface of the right end, the kth cell cartridge (100) is rotated 180 ° so that the first shaft tube 1211 is located in front of the right end so that the k-th first shaft tube 1211 and the k+1-th first shaft tube 1211 are arranged to be crossed, and then the coupling pin 122 ), the k-th cell cartridge 100 and the k+1-th cell cartridge 100 may be connected to each other.

Figure 4 is a detailed view showing a cell cartridge of the cell jig of the folding type according to an embodiment of the present invention, Figure 5 is a view showing one side of the cell jig folding type according to an embodiment of the present invention.

Hereinafter, a folding cell jig according to an embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5 .

In one example, the cell cartridge 100 includes a battery cell accommodating part 110 for accommodating the battery cells therein. In this case, the central portion may have an open top and bottom. For example, the body portion of the battery cell may be accommodated in the open portion of the cell cartridge 100 .

In addition, the cell cartridge 100 includes electrode lead accommodating parts 111 and 112 in which the electrode leads of the battery cells are accommodated. In one example, the cell cartridge 100 includes a first electrode lead receiving portion 111 formed in one direction, and has a structure including a second electrode lead receiving portion 112 formed in the other direction.

Furthermore, a terminal accommodating part 130 in which a terminal 140 such as a bus bar or an insulating bar is accommodated is included at the ends of the first and second electrode lead accommodating parts 111 and 112 .

In one example, the terminal accommodating part 130 has a structure in which a protrusion or a groove part 133 is formed. In addition, the terminal 140 accommodated in the terminal accommodating part 130 has a protrusion or a protrusion corresponding to the protrusion 133 of the terminal accommodating part 130 in an area in contact with the terminal accommodating part 130 . 143) may be a formed structure.

In another example, the terminal accommodating part 130 includes a first terminal accommodating part 131 and a second terminal accommodating part 132 . The first terminal accommodating part 131 may be a region in which the terminal 140 in contact with one surface of the first and second electrode leads is accommodated, and the second terminal accommodating part 132 is the first and second electrode leads. It may be an area in which the terminal 140 in contact with the other surface of the is accommodated. That is, the terminal 140 may be accommodated on one surface and the other surface with the electrode lead as the center, respectively. The specific structure and effect of the terminal 140 will be described later.

In one example, the cell cartridge 100 according to the present invention has a structure in which fixing protrusions 101 are formed on both inner surfaces of the battery cell accommodating part 110 . In a specific example, the fixing protrusion 101 is formed in the battery cell accommodating part 110 of the cell cartridge 100 , has a structure formed in an area adjacent to the battery cell, and protrudes in the horizontal direction of the cell cartridge 100 . is the structure The fixing protrusions 101 are formed to protrude from both inner surfaces of the battery cell accommodating part 110 , so that the battery cells accommodated in the cell cartridge 100 can be easily fixed from both sides. Meanwhile, the fixing protrusion 101 may have a structure in which the cell cartridge 100 is formed in a region oriented in a vertical direction with the first and second electrode lead receiving portions 111 and 112 .

Furthermore, the cell cartridge 100 according to the present invention may have a structure including a support 102 in the form of a protrusion on the other surface of one end and one surface of the other end, respectively. The support 102 is formed on the surface opposite to the area where the first shaft pipe 1211 and the second shaft pipe 1212 are located, and corresponds to the area where the first shaft pipe 1211 and the second shaft pipe 1212 are located. It can be formed in a position where The support 102 is such that when arranging the n cell cartridges 100 horizontally, they can be placed side by side on the ground.

In one example, the cell cartridge 100 according to the present invention includes a support 102 in the form of a protrusion, respectively, on the other surface of one end and one surface of the other end, and the support 102 is concave on the same line as the formed region. It is a structure including a groove (103). For example, the support 102 and the concave groove 103 may be alternately arranged on one surface and the other surface on which the shaft tube 121 is not formed in the cell cartridge 100 . And, when the n cell cartridges 100 are folded and vertically stacked, the support 102 of the k-th cell cartridge 100 may be seated in the concave groove 103 of the k+1-th cell cartridge 100 . have. Accordingly, the n cell cartridges 100 may be stacked more stably.

6 is a detailed view showing a terminal of a folding type cell jig according to an embodiment of the present invention.

In one example, the terminal 140 for electrically connecting or insulating the electrode leads of the neighboring battery cells 11 to each other is accommodated in the terminal receiving part 130 of the folding-type cell jig 10 according to the present invention. do. Here, the terminal 140 may be a bus bar or an insulating bar. The bus bar may be made of a material such as gold, silver, copper, or nickel, and may be any material as long as it enables the flow of current between the electrode leads of each battery cell. In addition, the insulating bar is intended to block the flow of current, and any material may be used as long as it is a plastic material capable of blocking the current.

In one example, in the terminal 140 according to the present invention, two terminals 140 end are connected to each other to form a pair of two terminals. In addition, the pair of terminals 140 are hinged 141 to each other and have a structure in which they are folded.

In a specific example, the terminal hinge 141 is configured to include a terminal shaft tube 1411 and a terminal coupling pin 1412 at an end thereof. The hinge 141 has a terminal shaft tube 1411 formed in one region of one end of the terminal 140 and includes a terminal coupling pin 1412 coupled to the other terminal. The terminal shaft tube 1411 may mean a tube shape in which a hollow is formed. For example, in a state in which the shaft tube 1411 of the two terminals 140 is positioned on the same axis, the terminal coupling pin 1412 is passed through the shaft tube 1411 to connect the two terminals 140, By fixing it with a terminal cap 1413, two terminals can be connected.

The terminal 140 may form a pair of terminals 140 by connecting a bus bar and a bus bar, and an insulating bar and an insulating bar to each other for electrical connection of the battery cells 11 accommodated in the cell cartridge 100 .

Furthermore, the terminal 140 may have a structure in which a protrusion of the terminal accommodating part 130 or a groove or a protrusion 143 corresponding to the protrusion 133 is formed in a region in contact with the terminal accommodating part 130 .

In one example, the terminal 140 is a pair of two terminals 140 , and is located in the first or second terminal receiving portions 131 and 132 of the two cell cartridges 100 that are folded to be adjacent to each other. It has a storage structure. In another example, when the n cell cartridge 100 of the present invention is folded to form a cartridge stack, a pair of terminals 140 is folded by the terminal hinge 141 to the k-th cell cartridge 100 . and the electrode lead of the k+1th cell cartridge. Accordingly, it is possible to electrically connect or insulate the battery cells 11 adjacent to each other.

On the other hand, when the pair of terminals 140 are accommodated in the terminal receiving part 130 of the cell cartridge 100, the hinge 120 and the terminal hinge 141 of the cell cartridge 100 are positioned on the same axis. It is preferable to be oriented and accommodated in the same direction.

7 is a perspective view showing a cartridge stack in which a folding cell jig is vertically stacked according to an embodiment of the present invention.

As shown in Figure 7, the cell jig of the folding type according to the present invention, n cell cartridges 100 are folded, can be vertically stacked. If necessary, the n cell cartridges 100 may be horizontally arranged without being folded.

In one example, the cell jig 10 of the folding type according to the present invention is accommodated in each of the battery cells 11 in the n number of cell cartridges (100). In addition, the bus bar is accommodated in the first terminal accommodating part 131 on one side of each cell cartridge 100 , and the insulating bar is accommodated in the first terminal accommodating part 131 on the other side of each cell cartridge 100 . Furthermore, an insulating bar is accommodated in the second terminal accommodating part 132 on one side of each cell cartridge 100 , and a bus bar is accommodated in the second terminal accommodating part 132 on the other side of each cell cartridge 100 . In this case, the battery cells 11 may be horizontally arranged without folding the n cell cartridges 100 , or the battery cells 11 may be vertically stacked by folding the n cell cartridges 100 . have.

In one example, the n cell cartridges 100 are folded by the hinge 120 to form the cartridge stack 1000 . In this case, the battery cells 11 accommodated in the n cell cartridges 100 have a structure in which the first electrode leads and the second electrode leads are alternately arranged based on the stacking direction. That is, in this case, the battery cells 11 accommodated in the cartridge stack 1000 may be electrically connected in series.

In another example, in the cell jig 10 of the folding type according to the present invention, the battery cells 11 are accommodated in each of the n cell cartridges 100 . In addition, the bus bars are accommodated in the first and second terminal accommodating parts 131 and 132 of each cell cartridge 100 . In this case, the battery cells 11 may be horizontally arranged without folding the n cell cartridges 100 , or the battery cells 11 may be vertically stacked by folding the n cell cartridges 100 . have.

In another example, the n cell cartridge 100 is folded by the hinge 120 to form the cartridge stack 1000, and the first and second electrode leads of the k-th battery cell 11 are accommodated. It has a structure positioned in the same direction as the first and second electrode leads of the k+1-th battery cell accommodated, respectively. That is, in this case, the battery cells 11 accommodated in the cartridge stack 1000 may be electrically connected in parallel.

8 is a view showing a process of using a cell cartridge according to an embodiment of the present invention. Referring to FIG. 8, the process and effect of using a cell cartridge according to an embodiment of the present invention will be described.

First, a user prepares a cell jig 10 of a folding type, and stores the battery cells 11 to be accommodated in each cell cartridge 100 . The battery cell 11 may be accommodated in the battery cell accommodating part 110 . At this time, it is preferable to prepare as many cell cartridges 100 as the number of battery cells 11 to be accommodated ( FIG. 8A ).

Then, the terminal 140 is accommodated in the terminal accommodating part 130 of the cell cartridge 100 . At this time, depending on the electrical connection, a bus bar or an insulating bar may be accommodated. Meanwhile, the terminal accommodating part 130 includes a first terminal accommodating part 131 and a second terminal accommodating part 132 . When the battery cells 11 accommodated in the cell jig 10 are electrically connected in series, A bus bar is accommodated in the first terminal accommodating part 131 on one side of each cell cartridge 100 , and an insulating bar is accommodated in the first terminal accommodating part 131 on the other side of each cell cartridge 100 . In addition, the insulating bar is accommodated in the second terminal accommodating part 132 on one side, and the bus bar is accommodated in the second terminal accommodating part 132 on the other side.

Alternatively, when the battery cells 11 accommodated in the cell jig 10 are electrically connected in parallel, bus bars are accommodated in the first and second terminal accommodating parts 131 and 132 of each cell cartridge 100 (FIG. 8B). , c).

Meanwhile, the cell jig 10 accommodating the battery cells 11 may be arranged horizontally, or the battery cells 11 may be vertically stacked to simulate a battery module. When the battery cells 11 are stacked, they are folded around the hinge 120 ( FIG. 8D ). With this configuration, the cell jig 10 of the present invention can easily accommodate and stack the battery cells 11 , and can easily perform temperature behavior or performance evaluation of the secondary battery module.

In addition, the present invention provides a battery module including the above-described cell jig.

In one example, the battery module is formed in a frame structure surrounding four sides of the battery cell, the first electrode lead receiving portion is formed in one direction, the second electrode lead receiving portion is formed in the other direction n pieces (n is an integer greater than or equal to 2) of a cell cartridge; a hinge formed on both sides of the cell cartridge and formed in a region forming a vertical direction with the first and second electrode lead receiving portions to connect the n cell cartridges to each other; and a terminal accommodating part formed at the ends of the first and second electrode lead accommodating parts, in which terminals of bus bars or insulating bars are accommodated, wherein the n cell cartridges are a k th cell cartridge (k is 1 or more, an integer less than or equal to n-1) has a structure in which one surface is folded so as to be adjacent to one surface of the k+1-th cell cartridge.

In addition, the cell cartridge may have a structure in which battery cells are accommodated. Since each configuration has been described above, a detailed description thereof will be omitted.

In addition, the present invention provides a secondary battery evaluation device (not shown) including the above-described cell jig. In one example, the cell jig further includes a charging/discharging unit electrically connected to a plurality of battery cells accommodated in the cell cartridge. The charging/discharging unit may supply charging power to the battery cell or receive discharging power from the battery cell. Here, supplying the charging power to the battery cells is not necessarily limited to the meaning of supplying sufficient power to the extent to buffer the battery cells. That is, supplying charging power to the battery cell may be used as supplying power sufficient to measure voltages of the first electrode lead, the second electrode lead, and the like for performance evaluation of the battery cell. Since the meaning of receiving discharge power from a battery cell can be used in the same way, a repeated description will be omitted.

In one example, the charging/discharging unit may have a structure directly connected to an electrode lead of a battery cell. Alternatively, the charging/discharging unit may have a structure connected to a bus bar or a terminal receiving unit of the cell jig according to the present invention.

For example, the secondary battery evaluation apparatus may evaluate a temperature behavior according to charging and discharging of a battery cell. In one example, by giving a change in the measured temperature, it is possible to reproduce an environment of increasing the withstand pressure of the battery cell according to the temperature change.

Furthermore, the present invention provides a secondary battery evaluation method using the secondary battery evaluation device described above. In one example, generating a gas inside the battery cells by overdischarging a plurality of battery cells connected to the charging/discharging unit to induce a chemical reaction inside the battery; and measuring the pressure and temperature inside the battery cell; includes

In one example, in the secondary battery evaluation method, a plurality of battery cells are overdischarged using a charging/discharging unit to induce gas emission, and the internal pressure and temperature of the battery may be measured using the overdischarge.

Hereinafter, various types of cell cartridges according to the present invention will be described with reference to the drawings.

(First embodiment)

9 is a cross-sectional view illustrating a series-connected state of a plurality of battery cells accommodated in a foldable cell jig according to an embodiment of the present invention.

Referring to FIG. 9 , a bus bar is accommodated in the first terminal accommodating part of one side of each cell cartridge, and the insulating bar is accommodated in the first terminal accommodating part of the other side of each cell cartridge. In addition, an insulating bar is accommodated in the second terminal accommodating part of one side of each cell cartridge, and the bus bar is accommodated in the second terminal accommodating part of the other side of each cell cartridge.

In addition, each cell cartridge is folded by a hinge to form a cartridge stack. At this time, each battery cell is stacked so that the positive electrode and the negative electrode cross each other in a vertical direction. Specifically, based on the battery cell stacked on the top, the first electrode lead (+) is in contact with the lower bus bar, and the second electrode lead (-) is in contact with the lower insulating bar. The bus bar in contact with the first electrode lead (+) of the battery cell stacked on the top is in contact with the second electrode lead (-) of the second battery cell stacked below, and electrically connects the two. On the other hand, the insulating bar in contact with the second electrode lead (-) of the battery cell stacked on top is in contact with the first electrode lead (+) of the second battery cell stacked below, but electrically cuts off the two. . The stacked structure electrically connects the stacked battery cells in series.

(Second embodiment)

10 is a cross-sectional view illustrating a parallel connection state of a plurality of battery cells accommodated in a folding-type cell jig according to another embodiment of the present invention.

Referring to FIG. 10 , both the bus bars are accommodated in the first and second terminal accommodating portions of each cell cartridge.

In addition, each cell cartridge is folded by a hinge shaft to form a cartridge stack. At this time, each battery cell is stacked so that the positive electrode and the negative electrode are oriented in the same direction. Specifically, first electrode leads (+) protrude from the left side of the stacked battery cells, and the first electrode leads (+) are electrically connected by intervening bus bars. In addition, second electrode leads (-) protrude from the right side of the stacked battery cells, and the second electrode leads (-) are electrically connected by intervening bus bars. This stacked structure electrically connects the stacked battery cells in parallel.

(Third embodiment)

11 is a view showing a series-connected state of a plurality of battery cells accommodated in a folding-type cell jig according to an embodiment of the present invention.

Referring to FIG. 11 , a bus bar is accommodated in the first terminal accommodating part of one side of each cell cartridge, and the insulating bar is accommodated in the first terminal accommodating part of the other side of each cell cartridge. In addition, an insulating bar is accommodated in the second terminal accommodating part of one side of each cell cartridge, and the bus bar is accommodated in the second terminal accommodating part of the other side of each cell cartridge.

Each of the cell cartridges shows a horizontally stacked state. Specifically, each cell cartridge is in an unfolded state.

At this time, each battery cell is arranged such that the positive electrode and the negative electrode cross each other in a vertical direction. Specifically, based on the leftmost battery cell, the first electrode lead (+) is in contact with the lower bus bar, and the second electrode lead (-) is in contact with the lower insulating bar. The bus bar in contact with the first electrode lead (+) of the battery cell arranged on the leftmost side is in contact with the second electrode lead (-) of the battery cell arranged on the second side to electrically connect the two. Specifically, two bus bars form a pair, in this case, one bus bar is accommodated in the second terminal accommodating part of the first array of battery cells, and the other bus bar is the second terminal of the second array of battery cells. stored in the storage unit.

In contrast, the insulating bar in contact with the second electrode lead (-) of the battery cell stacked on the far left is in contact with the first electrode lead (+) of the second arranged battery cell, but electrically blocks the two. The stacked structure electrically connects the stacked battery cells in series.

(Fourth embodiment)

12 is a diagram illustrating a parallel connection state of a plurality of battery cells accommodated in a foldable cell jig according to another embodiment of the present invention.

12, each cell cartridge shows a horizontally stacked state. Specifically, each cell cartridge is in an unfolded state.

The bus bars are both accommodated in the first and second terminal accommodating portions of each cell cartridge. Specifically, the bus bars are accommodated in the first and second terminal accommodating portions of one side of each cell cartridge, and the bus bars are also accommodated in the first terminal accommodating portions of the other side of the cell cartridge.

At this time, each battery cell is arranged such that the positive electrode and the negative electrode are oriented in the same direction. Specifically, first electrode leads (+) protrude from the upper side of the arranged battery cells, and the first electrode leads (+) are electrically connected by intervening bus bars. In addition, second electrode leads (-) protrude from the lower side of the arranged battery cells, and the second electrode leads (-) are electrically connected by intervening bus bars. This stacked structure electrically connects the stacked battery cells in parallel.

In the above, preferred embodiments of the present invention have been described with reference to the drawings, but those skilled in the art or those having ordinary skill in the art will not depart from the spirit and scope of the present invention described in the claims. It will be understood that various modifications and variations of the present invention can be made without departing from the scope of the present invention.

Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: cell jig
11: battery cell
12: top plate
13: lower plate
14: bolt
15: nut
100: cell cartridge
101: fixed projection
102: support
110: battery cell storage unit
111: first electrode lead receiving part
112: second electrode lead receiving part
120: hinge
121: shaft tube
1211: first shaft tube
1212: second shaft tube
122: coupling pin
123: hinge cap
130: terminal accommodating part
131: first terminal accommodating part
132: second terminal accommodating part
133: groove or protrusion
140: terminal
141: terminal hinge
1411: terminal shaft tube
1412: terminal coupling pin
1413: terminal cap
143: projection or groove
1000: cartridge stack

Claims (15)

n cell cartridges (n is an integer greater than or equal to 2) formed in a frame structure surrounding four sides of a battery cell, in which a first electrode lead receiving part is formed in one direction and a second electrode lead receiving part is formed in the other direction cartridge);
a hinge formed on both sides of the cell cartridge and formed in a region forming a vertical direction with the first and second electrode lead receiving portions to connect the n cell cartridges to each other; and
It is formed at the ends of the first and second electrode lead accommodating parts, and includes a terminal accommodating part in which terminals of a bus bar or an insulating bar are accommodated,
The n cell cartridge is a folding type having a structure in which one surface of the k-th cell cartridge (k is an integer greater than or equal to 1 and less than or equal to n-1) is folded adjacent to one surface of the k+1-th cell cartridge by a hinge connection. of cell jig.
The method of claim 1,
The hinge includes a shaft tube installed on one surface of one end of the cell cartridge and the other surface of the other end of the cell cartridge; and
A folding-type cell jig that is penetrated through the shaft and includes a coupling pin for coupling neighboring cell cartridges to each other.
3. The method of claim 2,
The hinge includes a first shaft tube installed on one surface of one end of the cell cartridge and a second shaft tube installed on the other surface of the other end of the cell cartridge, wherein the first shaft tube and the second shaft tube are alternately arranged,
The first shaft tube of the k+1th cell cartridge is a folding type cell jig having a structure in which it is coupled with the first shaft tube of the kth cell cartridge.
The method of claim 1,
The cell cartridge is a foldable cell jig having a structure in which fixing protrusions for fixing the battery cells are formed in the area adjacent to the battery cells on both inner surfaces of the battery cell accommodating part.
The method of claim 1,
The cell cartridge is a foldable cell jig having a structure including a support in the form of a protrusion, respectively, on the other surface of one end and one surface of the other end.
The method of claim 1,
The terminal accommodating part has a structure in which a protrusion part or a groove part is formed,
The terminal is a foldable cell jig having a structure in which a protrusion or a groove or a protrusion corresponding to the protrusion of the terminal accommodating part is formed in an area in contact with the terminal accommodating part.
The method of claim 1,
The terminal accommodating part may include: a first terminal accommodating part accommodating terminals in contact with one surface of the first and second electrode leads; and
A foldable cell jig having a structure including a second terminal accommodating portion in which terminals contacting the other surfaces of the first and second electrode leads are accommodated.
8. The method of claim 7,
Terminal, two terminal ends are connected to each other to form a pair of two terminals,
A foldable cell jig having a structure in which the pair of terminals are hinged to each other and folded.
9. The method of claim 8,
a pair of terminals,
A foldable cell jig having a structure accommodated in the first or second terminal accommodating portion of two cell cartridges that are folded to be adjacent to each other.
8. The method of claim 7,
Each battery cell is accommodated in n cell cartridges,
A bus bar is accommodated in the first terminal accommodating part of one side of each cell cartridge, and an insulating bar is accommodated in the first terminal accommodating part of the other side,
A folding-type cell jig in which an insulating bar is accommodated in the second terminal accommodating part of one side of each cell cartridge, and the bus bar is accommodated in the second terminal accommodating part of the other side.
11. The method of claim 10,
n cell cartridges are folded by a hinge to form a cartridge stack,
The battery cells accommodated in the n cell cartridges are foldable cell jigs having a structure in which a first electrode lead and a second electrode lead are alternately arranged based on a stacking direction.
8. The method of claim 7,
Each battery cell is accommodated in n cell cartridges,
A foldable cell jig having a structure in which bus bars are accommodated in the first and second terminal accommodating portions of each cell cartridge.
13. The method of claim 12,
n cell cartridges are folded by a hinge to form a cartridge stack,
A foldable cell jig having a structure in which the first and second electrode leads of the k-th battery cell are accommodated in the same direction as the first and second electrode leads of the k+1-th battery cell, respectively.
A battery module comprising a foldable cell jig according to claim 1
A secondary battery evaluation device comprising the folding-type cell jig according to claim 1 .

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