KR102211192B1 - Unit battery modue, Battery module and Battery pack And Method for manufacturing the same - Google Patents

Abstract

The unit battery module according to an embodiment of the present invention includes a battery cell including a battery body and a pair of electrode terminals protruding from the battery body, at least one battery cell being accommodated in both directions, and the received battery cell A cell support having a terminal coupling portion to which an inner connection bus bar to which the electrode terminals are electrically coupled, and a pair of frame portions coupled to and supporting the received battery cells in both directions, and the terminal coupling portion of the cell support At least one protrusion for forming the avoidance space s is formed to protrude when coupled with the connection bus bar.

Description

Unit battery modue, Battery module and Battery pack And Method for manufacturing the same}

The present invention relates to a unit battery module, a battery module and a battery pack, and a manufacturing method thereof.

In general, a secondary battery is a battery that can be used repeatedly through a discharge and charging process in the reverse direction that converts chemical energy into electrical energy, and the types include nickel-cadmium (Ni-Cd) batteries and nickel-hydrogen (Ni-MH). Batteries, lithium-metal batteries, lithium-ion (Ni-Ion) batteries, and lithium-ion polymer batteries (Li-Ion Polymer Battery, hereinafter referred to as “LIPB”), and the like.

The secondary battery is composed of a positive electrode, a negative electrode, an electrolyte, and a separator, and stores and generates electricity by using the voltage difference between different positive and negative materials. Here, discharging refers to moving electrons from a high voltage negative electrode to a low positive electrode (generating electricity as much as the voltage difference between the positive electrodes), and charging means moving electrons back from the positive electrode to the negative electrode. It returns to the original metal oxide. That is, when the secondary battery is charged, a charging current flows as metal atoms move from the anode to the cathode through the separator, and when discharging, the metal atoms move from the cathode to the anode, and the discharge current flows.

Recently, secondary batteries are attracting attention as an energy source in the spotlight by being widely used in IT products, automobile fields, and energy storage fields. In the field of IT products, secondary batteries can be used continuously for a long time, and are required to be miniaturized and lightweight, and in the automotive field, high power, durability, and stability to eliminate the risk of explosion are required. The energy storage field stores surplus power produced by wind power and solar power generation, and as it is used as a fixed type, a secondary battery with more relaxed conditions can be applied.

Such a secondary battery may be used by configuring a battery pack through serial or parallel continuous electrical connection between unit battery modules constituting a battery module, as in Korean Laid-Open Publication No. 2006-0028058, which is a patent document below.

KR 2006-0028058 A

One embodiment of the present invention is to solve the above conventional problems, it is possible to obtain a higher energy efficiency with a minimum space when configuring the unit cell module,

By standardizing the unit battery module, not only can the configuration of the battery module be shared, but also the degree of freedom in designing the shape of the electrical connection and the battery module can be effectively improved for various device specifications.

A unit battery module capable of simultaneously improving the electrical reliability and performance of the battery module and the battery pack including the same by securing electrical reliability as well as mechanical rigidity inside the unit battery module, and a method of manufacturing a battery module and battery module including the same And it is to provide a battery pack including the same.

The unit battery module according to an embodiment of the present invention includes a battery cell including a battery body and a pair of electrode terminals protruding from the battery body, at least one battery cell being accommodated in both directions, and the received battery cell A cell support having a terminal coupling portion to which an internal connection bus bar to which the electrode terminals are electrically coupled; And a pair of frame portions that are coupled in both directions of the accommodated battery cells to support, and the terminal coupling portion of the cell support protrudes at least one protrusion for forming an avoidance space when coupled with the internal connection bus bar. Is formed.

In addition, the inner connection bus bar coupled to the terminal coupling portion is formed by extending from the upper end of the terminal coupling portion to both sides and bending both sides downward, and both sides of the inner connection bus bar One side and the other side in the outer direction bent at may be formed to be electrically bonded to the electrode terminals of the battery cell, respectively.

In addition, a frame protrusion protruding outward may be further formed on an outer surface of the frame part to form a space between adjacent unit cell modules.

In addition, the frame protrusion may be continuously formed along the outer circumference of the frame protrusion.

In addition, the frame protrusion may be intermittently formed along the outer circumference of the frame protrusion.

In addition, the inner connection bus bar is formed to be spaced apart from each other on the one cell support, extends from the upper end of the terminal coupling portion to both sides, and is formed by bending both sides downward, and both sides of the inner connection bus bar One side and the other side in the outer direction bent in are formed to be spaced apart from the first inner connecting bus bar and the first inner connecting bus bar each formed to be electrically connected to the electrode terminal of the battery cell, and the bus bar body and the bus It may include a second internal connection bus bar including a terminal portion formed to extend in the direction of both sides in which the battery cells of the bar body are accommodated.

In addition, in the second internal connection bus bar, the bus bar body may be formed of an insulating material, and the terminal portion may be formed of a conductive metal material.

In the battery module according to an embodiment of the present invention, at least two or more unit battery modules are sequentially stacked and coupled in a lateral direction, and each internal connection bus bar is electrically connected between the sequentially stacked unit battery modules. It is formed to be connected to, and is formed by being stacked on the outermost side in the direction of one side of the unit cell module, and one of the pair of internal connection bus bars is electrically connected to the internal bus bar, and the other is electrically connected to an external power source. A first unit cell module including a first module terminal and a first unit cell module are stacked and formed on the outermost side in the direction of the other side of the unit cell module, and one of the pair of inner connecting bus bars is electrically connected to the inner bus bar, and the other And a second unit battery module including a second module terminal electrically connected to an external power source.

A battery pack according to an embodiment of the present invention includes a lower housing accommodating a battery module; And a metal cover member including a first metal cover member on one side and a second metal cover member on the other side so as to be coupled to the outermost sides of both sides of the battery module.

In addition, the internal connection bus bar is spaced apart on the unit battery module and formed as a first internal connection bus bar and a second internal connection bus bar, and the internal bus bar is coupled to a sensing circuit board coupled to an upper end of the battery module. , It may be formed of a coupling terminal portion respectively connected to the first internal connection bus bar and the second internal connection bus bar in both directions.

In addition, the lower housing is formed of a first side housing formed on one side to surround one side of the battery module, and a second side housing formed on the other side opposite to the first side housing to surround the other side of the battery module, At least one guide groove for coupling and alignment of the battery modules may be formed inside the first side housing and the second side housing, respectively.

In addition, it may further include an upper housing coupled to cover the upper portion of the lower housing.

A method of manufacturing a unit cell module according to an embodiment of the present invention includes the steps of preparing a first frame part, mounting a first battery cell on the first frame, an electrode terminal on the first battery cell and the received Coupling a cell support including a terminal coupling portion to which the internal connection bus bar is coupled so that the electrode terminal of the first battery cell is electrically connected to one side of the internal connection bus bar, and an electrode in the other direction of the internal connection bus bar Seating a second battery cell so that a terminal is electrically connected, coupling a second frame portion coupled to the second battery cell to correspond to the first frame portion, and the first frame portion and the It includes the step of laser welding along the outer circumference of the second frame portion.

In addition, after the step of stacking the first battery cells, the step of stacking a cooling assembly so as to be formed between the first battery cells and the second battery cells is further included.

In addition, the cooling assembly may have a cooling body corresponding to the battery body of the first battery cell and the second battery cell, and a cooling passage along the edge of the cooling body.

Further, in the step of laser welding the outer circumferences of the first frame part and the second frame part, the first frame part and the second frame part may be formed of a translucent material.

A method of manufacturing a battery module according to an embodiment of the present invention includes preparing a unit battery module, sequentially stacking a plurality of unit battery modules in a lateral direction of the unit battery module, and the plurality of unit battery modules It includes; performing electrical connection of each of the internal connection bus bars through the internal bus bar.

Further, in the step of performing electrical connection through the inner bus bar, the inner bus bar may be formed as a coupling terminal portion integrally coupled to a sensing circuit board coupled to the plurality of unit battery modules.

A method of manufacturing a battery pack according to an embodiment of the present invention includes the steps of inserting a battery module including a plurality of unit battery modules into a lower housing, from an upper direction opposite the lower housing to surround an upper surface of the inserted battery module. Combining the upper housing, and coupling a metal cover member to each of the outer surfaces of the unit battery modules respectively formed on the outermost sides of both side surfaces of the battery module.

In addition, in the step of inserting the plurality of unit battery modules into the lower housing, the lower housing is formed on one side of the first side housing surrounding one side of the battery module and the other side opposite the first side housing. It is formed as a second side housing surrounding the other side of the battery module, and at least one guide groove for coupling alignment of the battery module is formed inside the first side housing and the second side housing, respectively, and the unit cell Both sides of the module may be inserted into the guide groove.

Features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in the present specification and claims should not be interpreted in a conventional and dictionary meaning, and the inventor may appropriately define the concept of the term in order to describe his or her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

According to an embodiment of the present invention, by forming a protrusion on the terminal coupling portion of the cell support coupled to the internal connection bus bar for electrical connection of the unit cell module, the reliability of the welding connection between the internal connection bus bar and the terminal coupling portion can be improved. There is an effect.

In addition, by forming the internal connection bus bar for electrical connection of the unit battery module in a shape in which both sides are bent downward, the connection between the internal bus bar for electrical connection between the internal connection bus bars and the electrode terminal of the battery cell By minimizing overlap, there is an effect of further improving the reliability of the electrical connection.

In addition, there is an effect of improving the mechanical stiffness and durability of the unit battery module by providing a frame portion for fixing and supporting the battery cells accommodated in the unit battery module on the outer surfaces in both directions.

In addition, a plurality of unit battery modules are electrically connected through an internal connection bus bar formed in the unit battery module, and an internal connection bus bar and a module terminal are provided on each unit battery module formed on the outermost side in both directions. There is an effect that the battery module can be implemented through the battery module.

In addition, by realizing the battery module by sharing the unit battery module, battery modules of various specifications can be implemented more easily and accurately, thereby improving the electrical stability through the reliability of the electrical connection of the battery module and the bonding force at the time of assembly. There is an effect that can improve at the same time.

In addition, by providing a guide groove for guiding the side of each unit battery module on the lower housing in which the battery module is accommodated, it is possible to more effectively improve the reliability of assembly and operation performance as well as the electrical stability of the battery pack to which the battery module is combined. There is an effect.

1 is a perspective view of a battery cell according to an embodiment of the present invention;
2 is an exploded perspective view of a unit cell module according to an embodiment of the present invention;
3 and 4 are an exploded perspective view of a cell support according to an embodiment of the present invention
Further 5 is a cross-sectional view of the unit cell module according to an embodiment of the present invention;
6 is an exploded perspective view of a battery module according to an embodiment of the present invention;
7 to 13 are process diagrams of a method of manufacturing a unit cell module according to an embodiment of the present invention; And
14 to 17 are views showing a process of a method of manufacturing a battery pack using a unit battery module according to an embodiment of the present invention.

Objects, specific advantages, and novel features according to an embodiment of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings. In adding reference numerals to elements of each drawing in the present specification, it should be noted that, even though they are indicated on different drawings, only the same elements are to have the same number as possible. In addition, terms such as “one side”, “the other side”, “first”, and “second” are used to distinguish one component from other components, and the component is limited by the terms no. Hereinafter, in describing one embodiment of the present invention, a detailed description of related known technologies that may unnecessarily obscure the subject matter of the present embodiment will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a battery cell according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a unit battery module according to an embodiment of the present invention, and FIGS. 3 and 4 are a cell support according to an embodiment of the present invention. An exploded perspective view, further 5 is a cross-sectional view of a unit battery module according to an embodiment of the present invention, and Figure 6 is an exploded perspective view of the battery module according to an embodiment of the present invention.

The unit battery module according to an embodiment of the present invention includes a battery cell 10 including a battery body 11 and a pair of electrode terminals 12 protruding from the battery body 11, at least one in both directions. The battery cell 10 is accommodated, and a cell support having a terminal coupling portion 21a to which the internal connection bus bar 30 to which the electrode terminals 12 of the accommodated battery cell 10 are electrically coupled is formed ( 21) and a pair of frame portions 23 that are coupled to and supported in both directions of the housed battery cell 10, and the terminal coupling portion 21a of the cell support 21 includes the internal connection bus bar ( When combined with 30), at least one protrusion 21b for forming an avoidance space s is formed to protrude.

The battery cell 10 according to an embodiment of the present invention may use a lithium secondary battery or a nickel-hydrogen secondary battery as a rechargeable and dischargeable secondary battery, but is not necessarily limited thereto, and any secondary battery capable of charging and discharging It is obvious to those skilled in the art that various types of secondary batteries can be selected and applied. The battery cell 10 is a secondary battery having a thin thickness and a wide width and length to achieve a compactness of the battery module 40 formed by stacking at least one or more unit cells. Can be formed. For example, an electrode assembly is embedded in a case of a laminate sheet including a resin layer and a metal layer, and the first tab portion 12a and the second tab portion 12b constituting the electrode terminal 12 protrude. In particular, it may be formed in a structure in which an electrode assembly is embedded in a pouch-shaped case of an aluminum lined sheet.

Here, the electrode assembly includes an anode, a cathode, and a separator, and a separator is formed between the anode and the cathode. Depending on the method of combining the anode, the cathode, and the separator, it may be a type wound with a jelly-roll, or may be formed in a stack type/stack folding type. Hereinafter, a detailed description will be omitted since it corresponds to a conventionally known technology.

As shown in FIG. 1, the battery cell 10 includes a battery body 11 including an electrode assembly and a first tab portion 12a and a second electrode terminal 12 protruding and extending from the battery body 11. It may be formed as a tab portion (12b). The illustrated drawing shows that the first tab portion 12a and the second tab portion 12b are formed on the same side from the battery body 11, but the first tab portion 12a at one end and the other end of the battery body 11, respectively. And the second tab portion 12b may be formed, and the arrangement and type of the electrode terminals 12 are not limited to a special structure.

As shown in FIG. 2, the unit battery module includes a cell support 21, a battery cell 10 coupled to the cell support 21 in both directions, and a battery cell 10 in both directions outside the battery cell 10. ) Is composed of a frame portion 23 for receiving and fixing.

Hereinafter, each configuration of the unit cell module will be described in detail.

3 and 4, the cell support 21 is a terminal coupling portion 21a to which an internal connection bus bar 30 that can be electrically coupled to the electrode terminal 12 of the battery cell 10 is coupled. ) Are spaced apart from each other in the cell frame 21c to form a pair. As shown in the drawing, the terminal coupling portions 21a are spaced apart from each other at corresponding positions so that they can be coupled with a pair of electrode terminals 12 protruding from the battery cell 10 on the cell frame 21c. Can be formed. In one embodiment of the present invention, an example in which a pair of electrode terminals 12 protrude in one direction of the electrode terminal 12 is described, but in addition, the position of the electrode terminals 12 of the battery cell 10 is structurally changed. It can be, and accordingly, the structure of the cell support 21 can also be changed in design to correspond.

3 is an exploded perspective view showing a state in which the internal connection bus bar 30 is coupled to each terminal coupling portion 21a to the cell support 21. As described above, the internal connection bus bar 30 is coupled to each of the first tab portion 12a and the second tab portion 12b, which are electrode terminals 12 formed protruding from the battery body 11 of the battery cell 10. In order to do so, the terminal coupling portion 21a is formed at the corresponding position. As shown in the drawing, a pair of terminal coupling portions 21a are separated from each other and insulated, respectively, and are coupled to the internal connection bus bar 30. The internal connection bus bar 30 according to an embodiment of the present invention includes a first internal connection bus bar 31 and a second internal connection bus bar 32. The first internal connection bus bar 31 may be formed in a "∩" shape of an inverted "U" shape. That is, the internal connection bus bar 30 is formed by extending from the top surface in both directions and bent downward at both side ends. In this case, either of the first tab portion 12a or the second tab portion 12b of the electrode terminal 12 may be electrically welded to each other on each outer surface bent downward on both sides. It is obvious to those skilled in the art that the inverted "U" shape "∩" shown here is a specific embodiment, and that the design can be changed into any other specific shape formed on both sides so that the electrode terminals can be electrically connected respectively. to be.

The second internal connection bus bar 32 forms a terminal portion 32b on both sides of the bus bar body 32a and the bus bar body 32a so as to be electrically welded to the electrode terminal 12. As shown in FIG. 3, terminal portions 32b are formed on both side surfaces of the bus bar body 32a so as to correspond to the outer surfaces bent in both directions of the first internal connection bus bar 31. As shown in FIG. 2, the terminal portion 32b disposed to contact the terminal coupling portion is formed of a conductive metal material for electrical connection, and the bus bar body 32a is formed of an insulating material, and the method of formation thereof is It can be manufactured in various ways, such as.

It goes without saying that the first internal connection bus bar 31 and the second internal connection bus bar 32 are referred to as arbitrary, and the mutual positions of the exemplary embodiments shown in the drawings may be changed.

4 is a view showing a cell support 21 formed with the internal connection bus bar 30 and the module terminal 40. The module terminal 40 is formed for electrical connection between the battery module and an external device when forming one battery module by stacking a plurality of unit battery modules. That is, when one battery module is formed, it is electrically connected in parallel or in series between the internal connection bus bars 30 of each unit battery module through the internal bus bar, and the module terminals 40 are respectively arranged on the outermost side. It can be electrically connected to an external power supply and device through.

As shown in FIG. 5, at least one protrusion 21b may be formed to protrude on the terminal coupling portion 21a of the cell support 21. In the case of coupling the internal connection bus bar 30 on the terminal coupling portion 21a, in the case of general welding, when the cell support 21 including the terminal coupling portion 21a is damaged or coupled by heat generated during welding There may be a problem of poor reliability. Therefore, as shown in Fig. 5, when the protrusion 21b and the internal connection bus bar 30 are coupled, an avoidance space is formed so that the terminal coupling portion 21a and the internal connection bus bar 30 are welded together ( P portion) can prevent the cell support 21 including the terminal coupling portion 21a from being damaged by heat.

As shown in FIG. 2, the frame part 23 is electrically coupled to the battery cells 10 on the cell support 21, and the first frame parts ( It can be fixedly supported through 23a) and the second frame portion 23b. As will be described later, the first frame portion 23a and the second frame portion 23b may be coupled by laser welding in a manufacturing method, and thus may be formed of a translucent insulating material. A frame protrusion 21b may be formed on the outer periphery of the first frame part 23a and the second frame part 23b to secure a space between the unit battery modules. By providing a space between the unit battery modules, it is possible to see a cooling effect by air, and there is an advantage of preventing the occurrence of electrical reliability problems that may occur between the unit battery modules. Here, the frame protrusion may be formed continuously or intermittently along the outer circumference of the frame part 23.

6 is a view showing a schematic diagram of forming a battery module by electrically coupling a plurality of unit battery modules. In the battery module according to an embodiment of the present invention, at least two or more unit battery modules are sequentially stacked and coupled in a lateral direction, and each internal connection bus bar 30 is disposed between each of the sequentially stacked unit battery modules. It is formed to be electrically connected through a bus bar, and is formed by being stacked on the outermost side in the direction of one side of the unit cell module, and one of the pair of inner connecting bus bars 30 is electrically connected to the inner bus bar, and the other Is formed by being stacked on the outermost side in the direction of the other side of the unit cell module and a first unit battery module 1a including a first module terminal 41 electrically connected to an external power source, and a pair of internal connection bus bars 30 One of) is electrically connected to the internal bus bar, and the other includes a second unit cell module 1b including a second module terminal 42 electrically connected to an external power source.

That is, as shown in FIG. 6, an internal bus bar for electrical connection between the internal connection bus bars 30 is formed, and through the first module terminal 41 and the second module terminal 42 on both outermost sides. Electrical connection with external power or external devices is possible. As shown in FIG. 6, the internal bus bar may be formed through the coupling terminal portion 51 coupled to the sensing circuit board 50.

Hereinafter, the structure of the battery pack in the unit battery module and the method of manufacturing the battery module and the battery pack including the same will be described later.

7 to 13 are views showing a process of manufacturing a unit cell module according to an embodiment of the present invention.

A method of manufacturing a unit cell module according to an embodiment of the present invention includes preparing a first frame part 23a, seating a first battery cell 10a on the first frame, the first battery The internal connection bus bar (the internal connection bus bar ()) so that the electrode terminal 12 on the cell 10a and the electrode terminal 12 of the received first battery cell 10a are electrically connected to one side of the internal connection bus bar 30 The step of coupling the cell support 21 including the terminal coupling portion 21a to which the 30) is coupled, the second battery cell so that the electrode terminal 12 is electrically connected in the other direction of the internal connection bus bar 30 ( Mounting 10b), coupling a second frame portion 23b coupled to the second battery cell 10b and coupled to correspond to the first frame portion 23a; And laser welding along the outer circumferences of the first frame portion 23a and the second frame portion 23b.

Hereinafter, the detailed description will be described with reference to the drawings.

First, as shown in FIG. 7, a first frame part 23a is prepared. As described above, the first frame part 23a may be formed of a translucent material for laser welding bonding with the second frame part 23b to be described later.

Next, as shown in FIG. 8, the first battery cell 10a is inserted so as to be seated therein.

Next, as shown in Fig. 9, a pair of electrode terminals 12 formed in the first battery cell 10a and the internal connection bus bar 30 are electrically connected to each other, a terminal coupling portion 21a The cell support 21 to which the internal connection bus bar 30 is coupled is coupled to the first battery cell 10a.

Next, as shown in FIG. 10, the cooling assembly 80 is inserted. Insertion of the cooling assembly 80 is not necessarily an essential step in the manufacturing method of the unit cell module, and may be appropriately omitted in some cases. The cooling assembly 80 includes a cooling body 81 in contact with the battery cell 10 and a cooling passage 82 formed along the circumference of the cooling body 81. The battery cell is directly in close contact with the battery cell 10 to transfer heat generated from the battery cell 10 to the outside, and through the cooling water or refrigerant flowing in the cooling passage 82 formed around the cooling body 81 The heat of 10) can be cooled. Here, in the cooling assembly 80, a spacer forming an air channel for the air-cooled module may be inserted, and in the case of the water-cooled type, a cooling channel is formed inside the cooling body 81 As a matter of course, a cooling pin may be inserted, and a cooling assembly of various cooling methods may be inserted to suit the applied device.

Next, as shown in FIG. 11, the second battery cell 10b may be directly inserted into the first battery cell 10a, or the second battery cell 10b may be inserted into the cooling assembly 80 described above. have. Like the first battery cell 10a, the second battery cell 10b is coupled to one side of the inner connection bus bar 30 of the cell support 21 so that the electrode terminal 12 can be electrically connected.

Next, as shown in FIG. 12, by combining the second frame part 23b, the first battery cell 10a and the second battery cell 10b accommodated therein are supported and fixed. The second frame portion 23b is mated and coupled to a position facing the first frame portion 23a.

Next, as shown in FIG. 13, the outer peripheral portions of the first frame portion 23a and the second frame portion 23b are coupled through laser welding. By using laser welding, there is an advantage in that problems such as damage or breakage of a member that may occur through a physical coupling structure, and reliability of coupling can be prevented in advance. In addition, it goes without saying that productivity can be improved by reducing the lead time in the process.

14 to 17 are diagrams illustrating a process of a method of finally manufacturing a battery pack by configuring a battery module through a unit battery module.

14, a battery module obtained by sequentially stacking and bonding unit battery modules to a lower housing 70 is combined. Here, the manufacturing method of the battery module includes preparing the unit battery module manufactured above, sequentially stacking a plurality of unit battery modules in a lateral direction of the unit battery module, and each interior of the plurality of unit battery modules. It includes; performing electrical connection of the connection bus bar through the inner bus bar. That is, one battery module may be formed by stacking a plurality of unit battery modules. Each unit battery module of the battery module can be formed by electrically connecting the internal bus bars between the internal connection bus bars of the unit battery module as described above. In addition, as described above, the internal bus bar may be formed as a coupling terminal portion integrally coupled to a sensing circuit board coupled to a plurality of unit battery modules.

At this time, the lower housing 70 is formed on one side of the first side housing 71 that surrounds one side of the battery module, and the second side that is formed on the other side opposite to the first side housing 71 to surround the other side of the battery module. It is formed as a housing 72, and at least one guide groove 73 for coupling alignment of the battery modules is formed inside the first side housing 71 and the second side housing 72, respectively, and Both sides are inserted to match the guide groove (73). As shown in FIG. 14, the battery module coupled to the lower housing 70 has one first module terminal 41 and a second module on the outermost unit cell module, respectively, to enable electrical connection to an external power source or device. A module terminal 42 is provided.

Next, as shown in FIG. 15, an internal bus bar for electrical series or parallel connection between unit battery modules of the battery module is coupled. In the step of coupling the sensing circuit board 50, the internal bus bar may be implemented through the coupling terminal portions 51 protruding in both directions on the sensing circuit board 50. As shown in FIG. 15, the coupling terminal portions 51 are coupled in a corresponding number at positions respectively electrically coupled to the internal connection bus bars 30 on both sides of the sensing circuit board 50.

Next, as shown in FIG. 16, the upper housing 60 is coupled to cover the upper surface of the inserted battery module. The upper housing 60 is coupled on the opposite side of the lower housing 70 described above. The upper housing 60 is also provided with the same guide grooves 73 on both side housings as shown in the lower housing 70, so that each of the unit battery modules is coupled from the upper direction to guide the coupling direction. .

Next, finally, both sides of the battery module are coupled with a pair of metal cover members 90. By doing so, a final battery pack can be configured.

A detailed description of each component has been described above in the unit cell module according to an embodiment of the present invention, and therefore, a duplicate description will be omitted.

One embodiment of the present invention has been described in detail through specific examples, but this is to specifically describe one embodiment of the present invention, and one embodiment of the present invention is not limited thereto, and an embodiment of the present invention It is clear that modifications or improvements can be made by those of ordinary skill in the art within the technical idea contained in

All simple modifications or changes to an embodiment of the present invention belong to the scope of an embodiment of the present invention, and the specific scope of protection of an embodiment of the present invention will be clarified by the appended claims.

1: unit battery module 1a: first unit battery module
1b: second unit battery module 10: battery cell
10a: first battery cell 10b: second battery cell
11: battery body 12: electrode terminal
12a: first tab portion 12b: second tab portion
21: cell support 21a: terminal coupling portion
21b: protrusion 21c: cell frame
23: frame portion 23a: first frame portion
23b: second frame part 30: internal connection bus bar
31: first internal connection bus bar 32: second internal connection bus bar
32a: bus bar body 32b: terminal portion
40: module terminal 41: first module terminal
42: second module terminal 50: sensing circuit board
51: coupling terminal part 60: upper housing
70: lower housing 71: first side housing
72: second side housing 73: guide groove
80: cooling assembly 81: cooling body
82: cooling channel 90: metal cover member

Claims (20)

A battery cell including a battery body and a pair of electrode terminals protruding from the battery body;
A cell support having at least one battery cell in both directions and having a terminal coupling portion to which an inner connection bus bar to which the electrode terminals of the housed battery cells are electrically coupled; And
It includes a pair of frame portions that are coupled to and supported in both directions of the housed battery cells,
A unit battery module formed by protruding at least one protrusion for forming an avoidance space when the terminal coupling portion of the cell support is coupled to the internal connection bus bar. The method according to claim 1,
The inner connection bus bar coupled to the terminal coupling portion is formed by extending from the upper end of the terminal coupling portion to both sides and bent downward, and bent at both sides of the inner connection bus bar. The unit battery module is formed such that the side and the other side are electrically bonded to the electrode terminals of the battery cells, respectively. The method according to claim 1,
A unit cell module further formed on an outer surface of the frame portion with a frame protrusion protruding outward to form a space between adjacent unit cell modules. The method of claim 3,
The unit cell module wherein the frame protrusion is continuously formed along an outer circumference of the frame protrusion. The method of claim 3,
The frame protrusion is a unit cell module intermittently formed along the outer circumference of the frame protrusion. The method according to claim 1,
The internal connection bus bar is formed to be spaced apart from each other on the one cell support,
The terminal coupling part is formed by extending from the upper surface of the coupling direction to both sides so that both sides are bent downward, and one side and the other side in the outward direction bent at both sides of the inner connection bus bar are each of the electrode terminals of the battery cell. A first internal connection bus bar formed to be electrically joined, and
The bus bar body formed to be spaced apart from the first internal connection bus bar, and
A unit battery module comprising a second internal connection bus bar including terminal portions extending in the direction of both side surfaces of the bus bar body to accommodate the battery cells. The method of claim 6,
The second internal connection bus bar
The bus bar body is formed of an insulating material, and the terminal portion disposed to contact the terminal coupling portion is formed of a conductive metal material. At least two or more unit battery modules according to claim 1 are sequentially stacked and coupled in a lateral direction, and each internal connection bus bar is formed to be electrically connected through the internal bus bar between each of the sequentially stacked unit battery modules,
It is formed by being stacked on the outermost side of one side of the unit battery module, and one of the pair of internal connection bus bars is electrically connected to the internal bus bar, and the other includes a first module terminal electrically connected to an external power source. The first unit cell module and
The unit battery module is formed by being stacked on the outermost side in the direction of the other side, and one of the pair of internal connection bus bars is electrically connected to the internal bus bar, and the other includes a second module terminal electrically connected to an external power source. A battery module including a second unit battery module. A lower housing accommodating the battery module according to claim 8; And
A battery pack comprising a metal cover member including a first metal cover member on one side and a second metal cover member on the other side so as to be coupled to the outermost sides of both sides of the battery module. The method of claim 9,
The internal connection busbar
It is spaced apart on the unit battery module and formed as a first internal connection bus bar and a second internal connection bus bar,
The inner bus bar is
A battery pack formed of coupling terminal portions coupled to a sensing circuit board coupled to an upper end of the battery module and connected to a first internal connection bus bar and a second internal connection bus bar in both directions. The method of claim 9,
The lower housing
A first side housing formed on one side to surround one side of the battery module, and
It is formed on the other side of the opposite side of the first side housing is formed as a second side housing surrounding the other side of the battery module,
At least one guide groove for coupling and alignment of the battery modules is formed inside the first side housing and the second side housing, respectively. The method of claim 9,
A battery pack further comprising an upper housing coupled to the battery module to cover an upper surface of the battery module. Preparing a first frame unit;
Seating a first battery cell on the first frame;
The electrode terminal on the first battery cell and
The internal connection bus bar is coupled so that the electrode terminal of the received first battery cell is electrically connected to one side of the internal connection bus bar, and at least one protrusion for forming an avoidance space when the internal connection bus bar is coupled Coupling the cell support including the terminal coupling portion formed to protrude above;
Seating a second battery cell so that the electrode terminals are electrically connected to the other side of the internal connection bus bar;
Coupling a second frame portion coupled to the second battery cell and coupled to correspond to the first frame portion; And
A method of manufacturing a unit cell module comprising the step of laser welding along the outer circumferences of the first frame part and the second frame part. The method of claim 13,
After the step of stacking the first battery cells,
The method of manufacturing a unit battery module further comprising the step of stacking a cooling assembly to be formed between the first battery cell and the second battery cell. The method of claim 14,
The cooling assembly includes a cooling body corresponding to the battery body of the first battery cell and the second battery cell, and
A method of manufacturing a unit cell module in which a cooling passage is formed along the edge of the cooling body. The method of claim 13,
In the step of laser welding the outer circumference of the first frame part and the second frame part,
A method of manufacturing a unit cell module in which the first frame part and the second frame part are formed of a translucent material. Preparing the unit cell module manufactured according to claim 13;
Sequentially stacking a plurality of unit battery modules in a lateral direction of the unit battery module;
A method of manufacturing a battery module comprising: performing electrical connection to each of the plurality of unit battery modules through an internal bus bar. The method of claim 17,
In the step of performing electrical connection through the internal bus bar,
The method of manufacturing a battery module, wherein the internal bus bar is a coupling terminal unit integrally coupled to a sensing circuit board coupled to the plurality of unit battery modules. Inserting a battery module including the plurality of unit battery modules manufactured according to claim 17 into a lower housing;
Coupling an upper housing in an upper direction opposite the lower housing to surround the upper surface of the inserted battery module;
A method of manufacturing a battery pack comprising the step of coupling a metal cover member to each outer surface of each unit battery module formed on the outermost side in the direction of both sides of the battery module. Including the step of inserting the battery module including the plurality of unit battery modules manufactured according to claim 17 into the lower housing,
The lower housing
A first side housing formed on one side to surround one side of the battery module, and
It is formed on the other side of the opposite side of the first side housing is formed as a second side housing surrounding the other side of the battery module,
At least one guide groove for coupling alignment of the battery module is formed inside the first side housing and the second side housing, respectively,
A method of manufacturing a battery pack in which both sides of the unit battery module are inserted into the guide groove.

Images