KR102539183B1 - ICB sensing part AND BATTERY PACKAGE COMPRISING THEREOF - Google Patents

Abstract

Disclosed are an ICB sensing unit capable of preventing a crack of a bus bar and a short circuit of a fuse, and a battery package including the same. The ICB sensing unit of the battery package includes an internal circuit board (ICB) housing, a plurality of bus bars disposed in parallel to the ICB housing, a PCB to which the bus bars are electrically coupled, and a plurality of bus bars mounted on the PCB and electrically connected to the bus bars. It may include a locking block that accommodates the terminal and the PCB and is coupled with the ICB housing step by step.

Description

ICB sensing part and battery package including the same

The following description relates to an ICB sensing unit in a secondary battery and a battery package including the ICB sensing unit.

Batteries can be divided into primary batteries, which are used once and discarded, and secondary batteries, which can be recharged and reused.

Due to its advantages, secondary batteries are applied to various technical fields throughout the industry, and are widely used as energy sources for electronic devices, as well as solving air pollution from existing gasoline and diesel internal combustion engines using fossil fuels. As a way to achieve this, it is attracting attention as an energy source such as hybrid electric vehicles.

As the secondary battery, a nickel metal hydride (Ni-MH) battery is mainly used, and recently, a lithium ion battery has also been attempted. In order to satisfy high output and large capacity, a secondary battery pack having a large capacity is used by connecting small unit cells (hereinafter referred to as 'battery cells') in series or parallel. In the secondary battery battery pack, battery cells may be stacked at a high density, and prismatic or pouch-type batteries are used to increase space utilization.

In Korean Patent Registration No. 10-1230954, (a) a plurality of battery cells or unit modules connected in series and/or parallel are stacked in a lateral direction, and the electrode terminals of the battery cells are connected to the external input/output A battery cell stack equipped with a bus bar for connecting to a terminal; (b) voltage sensing members electrically connected to the electrode terminal connection parts of the battery cells located on the front and rear surfaces of the battery cell stack and having connection terminals at the ends for detecting the voltage of the battery cells or unit modules; (c) an upper case having a mounting portion for inserting and mounting the voltage sensing members, as a structure surrounding an end portion of one side of the battery cell stack and a portion of an upper end and a lower end; And (d) a lower case having an external input/output terminal provided on the front side as a structure coupled to the upper case while wrapping the other side end and upper and lower portions of the battery cell stack, a battery module comprising a is initiated

On the other hand, on the upper surface of the battery cell stack, a PCB and a bus bar for measuring the voltage of the battery cells are provided. Ultrasonic fusion is used when welding the bus bar, and vibration generated during ultrasonic fusion of the bus bar is transmitted to the PCB, causing cracks in the bus bar or short-circuiting of fuses provided in the PCB.

According to embodiments, an ICB sensing unit capable of preventing cracks of bus bars and short circuits of fuses when the bus bars are fused, and a battery package including the same are provided.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to embodiments for achieving the object of the present invention described above, the ICB sensing unit provided in the battery package includes an internal circuit board (ICB) housing, a plurality of bus bars arranged in parallel to the ICB housing, and the bus bars are electrically coupled It is configured to include a PCB, a plurality of terminals mounted on the PCB and electrically connected to the bus bar, and a locking block accommodating the PCB and coupled to the ICB housing in stages.

According to one side, the locking block may include a block housing to which the PCB is coupled to one side and a locking portion formed on an outer surface of the block housing and coupled to the ICB housing. The locking block may be primarily locked in a state in which the block housing is spaced apart from the ICB housing by a predetermined distance, and may be secondarily locked by further pushing the block housing against the ICB housing in the primary locking state. In the primary locking state, the contact portion of the bus bar is in a non-contact state with the terminal. In the secondary locking state, an end of the locking block is in contact with the ICB housing and the contact portion is in contact with the terminal.

According to one side, the locking part may include a plurality of protrusions protruding from the outer wall surface of the block housing. A locking block coupling guide to which the locking block is coupled may be formed at the center of the ICB housing, and a locking step to which the locking portion is coupled to the locking portion may be formed in the locking block coupling guide. For example, the locking part includes a first locking protrusion formed on an outer wall of the block housing and a second locking protrusion provided rearward than the first locking protrusion in a direction in which the locking block is coupled to the ICB housing. can do. The ICB housing is formed with a locking portion to which the locking unit is engaged, and a locking step formed on one side of the locking portion and protruding inwardly toward the locking block. The locking jaw may have a protrusion or a flange shape in which an upper end of the locking portion protrudes inward. In the primary locking state, an upper portion of the first locking protrusion may be coupled to a lower portion of the locking protrusion, and a lower portion of the second locking protrusion may be coupled to an upper portion of the protrusion. In the secondary locking state, an upper portion of the second locking protrusion may be coupled to a lower portion of the locking jaw.

According to one side, the first locking protrusion and the second locking protrusion may be formed with an inclined surface at the bottom. An inclined surface may be formed at an upper portion of the holding jaw. The second locking protrusion may have a larger contact area with the locking protrusion than the first locking protrusion.

According to one side, one end of the bus bar is bent to a predetermined length to form a contact portion, and the contact portion may pass through the PCB and be connected to the terminal.

On the other hand, according to embodiments for achieving the object of the present invention described above, a battery package having an ICB sensing unit forms a battery housing in which a plurality of battery cells are stacked and an upper surface of the battery housing, and sensing of the battery cells An ICB (Internal Circuit Board) sensing unit for the ICB sensing unit, an ICB housing, a plurality of bus bars disposed in parallel to the ICB housing, a PCB to which the bus bars are electrically coupled, and mounted on the PCB, It is configured to include a plurality of electrically connected terminals and a locking block accommodating the PCB and coupled with the ICB housing in stages.

According to one side, a locking block coupling guide to which the locking block is coupled is formed at the center of the ICB housing, and a locking portion and a locking jaw to which the locking block is coupled may be formed in the locking block coupling guide. For example, the locking block coupling guide may protrude from the ICB housing and have a vertical wall shape supporting a side surface of the locking block.

According to one side, the bus bar may be disposed on both sides of the center of the ICB housing, and the contact unit may be disposed in the center of the ICB housing.

Various embodiments of the present invention may have one or more of the following effects.

According to the embodiments, by assembling the ICB sensing unit in two steps, the bus bar is fused in a state where the PCB is separated from the bus bar, so that the vibration generated when the bus bar is fused is not directly transferred from the bus bar to the PCB. It is possible to prevent cracks from occurring and to prevent short circuits of fuses.

1 is a perspective view of a battery package according to an embodiment of the present invention.
2 is a plan view of an ICB sensing unit according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line II in the ICB sensing unit of FIG. 2 .
4 is an exploded perspective view of a locking block and a PCB according to an embodiment of the present invention.
5A and 5B are perspective views of main parts for explaining an assembly process of a locking block and a bus bar in the ICB sensing unit of FIG. 2 .

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

Hereinafter, the ICB sensing unit 110 and the battery package 100 including the ICB sensing unit 110 according to embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5B.

1 is a perspective view of a battery package 100 according to an embodiment of the present invention.

Referring to FIG. 1 , a battery package 100 includes a plurality of battery cells (not shown), is provided on an upper portion of a battery housing 101 in which the battery cells are accommodated, and has an internal circuit board (ICB) for sensing the battery cells. ) The sensing unit 110 is provided.

The battery package 100 may have a pouch-type secondary battery in which battery cells are stacked in a vertical or horizontal direction. Also, the battery housing 101 may be formed to surround at least a portion of a lower end and/or a side surface of the stack of battery cells. In the drawings, the battery housing 101 is simplified, and the present invention is not limited by the drawings.

Meanwhile, the battery package 100 includes, in addition to these battery cells, end plates (not shown) provided on the top and bottom of the battery cell stack, ducts (not shown) for inflow and outflow of air inside and outside the battery package 100, and battery cells. A sensing module (not shown) that is connected to the electrode tab and senses a voltage may be further provided. Detailed illustrations and descriptions of these components are omitted.

The ICB sensing unit 110 is coupled to an upper portion of the battery housing 101 to form an upper surface of the battery package 100, and includes a bus bar 112 and a PCB 121 for sensing battery cells. Here, in this embodiment, the ICB sensing unit 110 has been illustrated as being provided on the top of the battery package 100, but the present invention is not limited thereto, and it is also possible to be provided on the side of the battery package 100.

The configuration of the ICB sensing unit 110 will be described in more detail with reference to FIGS. 2 to 5B.

For reference, FIG. 2 is a plan view of the ICB sensing unit 110 according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of the ICB sensing unit 110 of FIG. 2 along line II. FIG. 4 is an exploded perspective view of the locking block 120 and the PCB 121 in the ICB sensing unit 110 of FIG. 2 . 5A and 5B are perspective views of main parts for explaining an assembly process of the locking block 120 and the bus bar 112 in the ICB sensing unit 110 of FIG. 2 .

Referring to the drawing, the ICB sensing unit 110 includes an ICB housing 111 provided on one side of the battery package 100 and a locking block 120 coupled to the ICB housing 111 and having a PCB 121. consists of including

The ICB housing 111 forms the top surface of the battery package 100 and may be formed to surround at least a portion of the top and/or side surfaces of the battery cell stack. However, the present invention is not limited to the drawings, and the ICB housing 111 may also form a side surface of the battery package 100 .

The bus bar 112 may transfer information about the voltage of the battery cell to the PCB 121 and may change a power transfer direction of the battery cell. A plurality of bus bars 112 are disposed in the ICB housing 111. For example, the bus bar 112 is disposed on both sides based on the center of the ICB housing 111, one end is disposed in the center of the ICB housing 111, and the other end is bent to the side and coupled to the battery cell.

The bus bar 112 is formed in a rectangular plate shape, and a contact portion 113 coupled to the PCB 121 is formed at one end disposed in the center of the ICB housing 111 . The contact portion 113 extends from the bus bar 112 to a predetermined length, and an end thereof is bent upward by 90 degrees from the bus bar 112 to form a bent portion 113a. The contact unit 113 is electrically coupled to the terminal 122 through a PCB 121 to be described later.

The bus bar 112 is formed so that the other end is coupled to the side of the ICB housing 111, and may be bent multiple times to surround the side of the ICB housing 111.

In addition, among the edges of the bus bar 112, one edge of the side portions excluding the contact portion 113 and the other end is ultrasonically welded to the ICB housing 111 to form an ultrasonic welded portion 114. For example, the ultrasonic fusion part 114 may be formed in a flange shape in which one edge of the bus bar 112 is bent at a predetermined length by 90 degrees and bent upward. However, the present invention is not limited by the drawings, and the shape of the bus bar 112 may be substantially changed in various ways.

Intervals between the bus bars 112 may be asymmetrically disposed in the ICB housing 111 . In addition, the bus bars 112 disposed on both sides of the center of the ICB housing 111 may be disposed asymmetrically. However, the present invention is not limited thereto, and the bus bars 112 may be equally spaced and symmetrically arranged.

In the center of the ICB housing 111, a locking block coupling guide 115 into which the locking block 120 is inserted and coupled is formed. The locking block coupling guide 115 may have a flange or vertical wall shape protruding from the surface of the ICB housing 111 to a predetermined height, and may have a shape into which the locking block 120 is inserted. However, the present invention is not limited by the drawings, and the locking block coupling guide 115 may have various shapes as long as the locking block 120 is a structure to which it can be coupled.

The PCB 121 is provided inside the locking block 120, and a plurality of terminals 122 and electronic components 123 coupled to the bus bar 112 are mounted. On the PCB 121, at least one electronic component 123 of a BMS, a current sensor, a relay, and a fuse may be mounted. Detailed illustration and description of the circuit configuration mounted on the PCB 121 will be omitted.

A connector 124 for electrical connection with a battery cell (not shown) is coupled to one side of the PCB 121 . The connector 124 is provided on the rear surface of the PCB 121 on which the terminal 122 and the electronic component 123 are mounted.

A contact hole 121a through which the contact portion 113 passes is formed in the PCB 121, so that when the locking block 120 and the ICB housing 111 are coupled, the contact portion 113 penetrates the PCB 121. coupled to terminal 122.

In addition, in order to fasten the PCB 121 and the locking block 120, a housing coupling hole 121b through which the coupling boss 127 passes is formed in the PCB 121, and coupled to the locking block 120 with a predetermined height. A boss 127 is formed. Further, in a state in which the coupling boss 127 is coupled to pass through the housing coupling hole 121b, an end portion of the coupling boss 127 exposed on the upper surface of the PCB 121 may be caulked and fixed. However, the present invention is not limited thereto, and various methods of fixing the PCB 121 to the locking block 120 may be used in addition to the coupling boss 127 . For example, the locking block 120 and the PCB 121 may be coupled to each other by forming embossing, or the PCB 121 may be coupled and fixed to the locking block 120 using a separate fastening member such as a bolt. .

The locking block 120 includes a block housing 125 having a PCB 121 therein and inserted into and coupled to the locking block coupling guide 115 and a locking part 126 formed on the outside of the block housing 125. It is composed by

The block housing 125 may have a box shape in which the PCB 121 is accommodated and fixed, and includes a plurality of vertical walls fitted inside the locking block coupling guide 115 . However, the shape of the block housing 125 is not limited by the drawings, and may have substantially various shapes.

The locking part 126 is formed on the outer wall of the block housing 125, for example, the locking part 126 is predetermined on the outer surface of the block housing 125 so as to be engaged with the locking block coupling guide 115. It may be a plurality of protrusions protruding in height. In addition, the locking part 126 has a first locking protrusion 126a along a direction in which the locking block 120 is coupled to the ICB housing 111 so as to be double-locked to the locking block coupling guide 115, and the first locking protrusion 126a. It includes a second locking protrusion 126b formed rearward than the locking protrusion 126a.

In the following description, the 'up and down' direction will be described based on the direction shown in FIGS. 5A and 5B, and in some cases, the direction in which the locking block 120 is coupled will be described.

A locking portion 116 is formed on the locking block coupling guide 115 to correspond to the locking portion 126 . For example, the hooking portion 116 may have a shape of a hole or opening penetrating the locking block coupling guide 115 . In addition, the locking jaw 117 engaged with the locking portion 126 at the corner of the locking portion 116 in the direction in which the locking portion 126 is inserted and coupled (for example, the upper corner in FIGS. 5A and 5B) can be formed. For example, the locking jaw 117 may be a protrusion or a flange that protrudes inwardly toward the locking portion 126 at a predetermined height. In addition, the upper portion of the locking jaw 117 is formed as an inclined surface so that it can be inserted into the locking portion 116 by moving downward along the locking jaw 117 in a state in which the locking portion 126 is in contact with it. In addition, a flat step is formed at the lower portion of the locking jaw 117 so as to maintain a coupled state with the locking portion 126 . However, the shape of the locking jaw 117 is not limited by the drawing, and may have various shapes.

The first and second locking protrusions 126a and 126b have an inclined surface formed at the front end, ie, the bottom, in the direction in which they are coupled. This is to allow the first and second locking protrusions 126a and 126b to continue to advance when they come into contact with the locking jaw 117 . The first and second locking protrusions 126a and 126b are formed with a flat step so that the rear end, that is, the upper part, can be stably maintained in a state engaged with the locking jaw 117. This allows the first and second locking protrusions 126a and 126b to remain in contact with the locking protrusion 117, and in particular, even when vibration occurs, the second locking protrusion 126b is separated from the protrusion 117. This is to prevent the locking block 120 from being fixed to the ICB housing 111. In addition, the second locking protrusion 126b may have a larger size than the first locking protrusion 126a so that an area in contact with the locking protrusion 117 is wider. The shape of the second locking protrusion 126b also prevents the second locking protrusion 126b from being separated from the locking jaw 117 even when vibration occurs, so that the locking block 120 is fixed to the ICB housing 111. is to ensure that However, the present invention is not limited thereto, and the shapes of the first locking protrusion 126a and the second locking protrusion 126b may have substantially various shapes.

Hereinafter, a double locking structure of the locking block 120 will be described with reference to FIGS. 5A and 5B.

5A is a view showing a state in which the locking block 120 is primarily locked to the ICB housing 111. Referring to the drawing, in the primary locking state, the locking block 120 is pushed into the ICB housing 111 so that the first locking protrusion 126a is engaged with the engaging portion 116 . Specifically, in the primary locking state, the upper portion of the first locking protrusion 126a is coupled to the lower end of the locking protrusion 117, and the lower portion of the second locking protrusion 126b is coupled to the upper end of the protrusion 117. become a state In addition, since the first locking protrusion 126a and the second locking protrusion 126a are coupled to the locking protrusion 117 to form a double-coupled state, it is possible to prevent the locking block 120 from being separated from the ICB housing 111. can

In addition, in this primary locking state, the bottom of the locking block 120 and the PCB 121 are spaced apart from the surface of the ICB housing 111 by a predetermined distance (G). Here, the contact portion 113 of the bus bar 112 passes through the PCB 121 and is inserted into the contact hole 121a, but is not in contact with the terminal 122. In the primary locking state, since the contact portion 113 of the terminal 122 and the bus bar 112 is in a non-contact state, vibration generated while ultrasonic welding the bus bar 112 is not directly transmitted to the PCB 121, , Due to this, cracks in the bus bar 112 or a short circuit in a fuse (not shown) can be prevented.

5B is a view showing a state in which the locking block 120 is secondarily locked to the ICB housing 111. Referring to the drawings, in the secondary locking state, the locking block 120 is further pushed into the ICB housing 111 in the primary locking state so that the second locking protrusion 126b is coupled to the engaging portion 116. In detail, in the secondary locking state, the upper part of the second locking protrusion 126b is coupled to the lower end of the locking protrusion 117, and the first locking protrusion 126a is located inside the engaging part 116. In this secondary locking state, the locking block 120 is completely inserted into the ICB housing 111, so that the lower end of the locking block 120 comes into contact with the surface of the ICB housing 111, and the contact portion 113 also Complete assembly is achieved while being in contact with the terminal 122.

Meanwhile, although not shown, after the secondary locking of the locking block 120, a process of fixing the locking block 120 to the ICB housing 111 may be further performed. For example, the locking block 120 may be fixed to the ICB housing 111 using a fixing member such as a separate bolt.

According to the embodiments, since the locking block 120 is primarily locked and the bus bar 112 is welded in a state where the bus bar 112 and the PCB 121 are separated, the bus bar 112 is welded. It is possible to prevent vibrations generated during operation from being directly transferred from the bus bar 112 to the PCB 121, thereby preventing the occurrence of cracks in the bus bar 112 and the occurrence of a short circuit in a fuse or the like. In addition, since the assembly is performed by inserting the locking block 120 in which the PCB 121 is assembled into the ICB housing 111, the assembly process can be easily performed.

As described above, although the embodiments have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

100: battery package
101: battery housing
110: ICB sensing unit
111: ICB housing
112: bus bar
113: contact unit
113a: bent portion
114: ultrasonic fusion part
115: locking block coupling guide
116: hanging part
117: snag
120: locking block
121: PCB
121a: contact hole
121b: housing coupling hole
122: terminal
123: electronic parts
124: connector
125: block housing
126: locking unit
126a, 126b: locking protrusion
127: Combination Boss
G: gap

Claims (20)

In the ICB sensing unit provided in the battery package,
an internal circuit board (ICB) housing;
a plurality of bus bars arranged in parallel on the ICB housing;
a PCB to which the bus bar is electrically coupled;
a plurality of terminals mounted on the PCB and electrically connected to the bus bar; and
a locking block accommodating the PCB and coupled with the ICB housing step by step;
ICB sensing unit including a.
According to claim 1,
The locking block,
Block housing to which the PCB is coupled to one side;
a locking part formed on an outer surface of the block housing and coupled to the ICB housing;
ICB sensing unit including a.
According to claim 2,
The locking block,
The block housing is primarily locked while being spaced apart from the ICB housing at a predetermined interval,
In the primary locking state, the ICB sensing unit is secondarily locked by further pushing the block housing against the ICB housing.
According to claim 3,
In the primary locking state, the contact portion of the bus bar is in a non-contact state with the terminal.
According to claim 4,
In the secondary locking state, an end of the locking block is in contact with the ICB housing, and the contact portion is in contact with the terminal.
According to claim 3,
The locking part,
ICB sensing unit including a plurality of protrusions protruding from the outer wall of the block housing.
According to claim 6,
A locking block coupling guide to which the locking unit is coupled is formed at the center of the ICB housing,
An ICB sensing unit having a locking portion coupled to the locking unit and a locking jaw formed in the locking block coupling guide.
According to claim 6,
The locking part,
a first locking protrusion formed on an outer wall of the block housing; and
a second locking protrusion provided behind the first locking protrusion in a direction in which the locking block is coupled to the ICB housing;
ICB sensing unit including a.
According to claim 8,
In the ICB housing,
a locking portion to which the locking portion is engaged; and
a locking step formed on one side of the locking portion and protruding inward toward the locking block;
The formed ICB sensing unit.
According to claim 9,
The locking jaw is an ICB sensing unit having a protrusion or a flange shape in which an upper end of the locking portion protrudes inward.
According to claim 9,
In the primary locking state, an upper portion of the first locking protrusion is coupled to a lower portion of the locking protrusion, and a lower portion of the second locking protrusion is coupled to an upper portion of the protrusion.
According to claim 9,
In the secondary locking state, the ICB sensing unit in which the upper portion of the second locking protrusion is coupled to the lower portion of the locking jaw.
According to claim 8,
The first locking protrusion and the second locking protrusion have an inclined surface formed at the bottom of the ICB sensing unit.
According to claim 7,
The engaging jaw is an ICB sensing unit having an inclined surface formed thereon.
According to claim 8 ,
The second locking protrusion has a larger contact area with the locking protrusion than the first locking protrusion.
According to claim 1,
One end of the bus bar is bent to a predetermined length to form a contact portion,
The contact unit penetrates the PCB and is connected to the terminal.
a battery housing in which a plurality of battery cells are stacked; and
an internal circuit board (ICB) sensing unit that forms an upper surface of the battery housing and senses a battery cell;
including,
The ICB sensing unit,
ICB housing;
a plurality of bus bars arranged in parallel on the ICB housing;
a PCB to which the bus bar is electrically coupled;
a plurality of terminals mounted on the PCB and electrically connected to the bus bar; and
a locking block accommodating the PCB and coupled with the ICB housing step by step;
A battery package comprising a.
According to claim 17,
A locking block coupling guide to which the locking block is coupled is formed at the center of the ICB housing,
A battery package in which the locking block coupling guide is formed with a locking portion and a locking jaw to which the locking block is coupled.
According to claim 18,
The locking block coupling guide protrudes from the ICB housing and has a vertical wall shape supporting a side surface of the locking block.
According to claim 17,
The battery package wherein the bus bars are disposed on both sides of the center of the ICB housing, and the contact portion of the bus bar is disposed in the center of the ICB housing.

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