KR102047481B1 - Battery module and battery pack including the same - Google Patents

Abstract

A battery module according to the present invention includes a cartridge stack including a plurality of secondary batteries each having an electrode lead, and a plurality of cartridges each accommodating at least one secondary battery among secondary batteries and stacked in multiple stages; An ICB housing having a bus bar to which electrode leads are connected and coupled to one surface of the cartridge stack; And a cooling plate coupled to the other surface of the cartridge stack, wherein the plate body is formed to face the cartridge stack, and the coupling portion is formed to face the ICB housing, and the cartridge stack is in contact with one surface of the cartridge stack at a predetermined angle; The ICB housing further comprises a first bolt hole perforated to screw into a threaded portion of the bolt having a predetermined size, and the cooling plate drills into the joining portion such that the screw is screwed and disposed in line with the first bolt hole. It characterized in that it further comprises a second bolt hole. According to the present invention, it is possible to assemble a plurality of members at the same time using one bolt, to reduce the number of bolts required for the assembly of the battery module, it is possible to shorten the assembly time of the battery module.

Description

Battery module and battery pack including same {Battery module and battery pack including the same}

The present invention relates to a battery module and a battery pack including the same.

In recent years, the demand for portable electronic products such as notebooks, video cameras, mobile phones, etc. has been rapidly increased, and development of electric vehicles, storage batteries for energy storage, robots, satellites, etc. has been in earnest, and thus high-performance secondary batteries capable of repeating charge and discharge There is an active research on.

Commercially available secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel-based secondary batteries, and thus are free of charge and discharge. The self-discharge rate is very low and the energy density is high.

Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with the positive electrode active material and the negative electrode active material are disposed with a separator interposed therebetween, and an exterior material for sealing and storing the electrode assembly together with an electrolyte, that is, a battery case.

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

Recently, secondary batteries are widely used not only in small devices such as portable electronic devices but also in medium and large devices such as automobiles and power storage devices. When used in such medium and large devices, a large number of secondary batteries are electrically connected to increase capacity and output. In particular, the pouch type secondary battery is widely used in such a medium-large size device because of its easy storage and lamination.

The battery module may refer to a component in which a plurality of secondary batteries are connected in series or in parallel in order to increase capacity and output. The conventional battery module includes an ICB housing including a cartridge stack in which a plurality of cartridges each containing a secondary battery is stacked in multiple stages, a bus bar connected to electrode leads of the secondary batteries, and an ICB cover protecting the exterior of the ICB housing; A cooling plate is installed to be in contact with the cartridge stack to discharge heat generated from the secondary batteries to the outside, and a module case is installed to surround the battery module. The conventional battery module has an assembly structure in which the cooling plate and the module case are screwed together using bolts to form a cooling plate assembly, and then the cooling plate is coupled to the ICB cover using a separate bolt different from the bolts. . Therefore, the conventional battery module has a problem in that the number of bolts required for assembly of the battery module is increased by using separate bolts for coupling the cooling plate and the module case and coupling the cooling plate assembly and the ICB cover, respectively. In addition, the conventional battery module has a problem in that the time required for assembly of the battery module is increased by separately combining the cooling plate and the module case and assembling the cooling plate assembly and the ICB cover.

The present invention is to solve the above-mentioned problems of the prior art, an object of the present invention is to provide a battery module and a battery pack including the improved structure to simplify the assembly structure of the battery module.

Battery module according to an aspect of the present invention for solving the above problems, a plurality of secondary batteries each having an electrode lead, and at least one secondary battery of the secondary batteries, respectively, a plurality of stacked in multiple stages A cartridge stack comprising cartridges; An ICB housing having a bus bar to which electrode leads are connected and coupled to one surface of the cartridge stack; And a cooling plate coupled to the other surface of the cartridge stack, wherein the plate body is formed to face the cartridge stack, and the coupling portion is formed to face the ICB housing, and the cartridge stack is in contact with one surface of the cartridge stack at a predetermined angle; The ICB housing further comprises a first bolt hole perforated to screw into a threaded portion of the bolt having a predetermined size, and the cooling plate drills into the joining portion such that the screw is screwed and disposed in line with the first bolt hole. It characterized in that it further comprises a second bolt hole.

Preferably, the cooling plate further includes a fixing bush which protrudes to face toward the cooling plate and is bored with the first bolt hole.

Preferably, the bus bar has a connection pin protruding toward the cooling plate, and has a connection hole into which the connection pin is inserted, and a receptacle mounted inside the connection hole to be connected to the connection pin, and a sensing housing coupled to the coupling part. It characterized in that it further comprises.

Preferably, the sensing housing further comprises a housing coupling rib formed to be interposed between the ICB housing and the coupling portion, and a first guide hole perforated in the housing coupling rib such that the threaded portion passes and is disposed in line with the first bolt hole. Characterized in that.

Preferably, the sensing housing further comprises a housing pedestal which is formed to support the sensing housing, and a second guide hole which is perforated in the housing pedestal so that the threaded portion passes and is disposed in line with the first bolt hole.

Preferably, the housing coupling rib and the housing pedestal, characterized in that formed so as to be spaced apart by a distance corresponding to the thickness of the coupling portion to fit the coupling portion in the space between the housing pedestal and the housing coupling rib.

Preferably, the cover body is provided to surround at least a portion of the ICB housing, the cover coupling rib extending from the cover body so as to be interposed between the ICB housing and the coupling portion, the screw portion is passed and disposed in line with the first bolt hole It characterized in that it further comprises an ICB cover having a third guide hole perforated in the cover coupling rib.

Preferably, the ICB cover further comprises a cover pedestal formed to support the ICB cover, and a fourth guide hole drilled in the cover pedestal so that the screw portion passes therethrough.

Preferably, it further comprises a module case screwed with the threaded portion and having a third bolt hole perforated to be disposed in line with the first bolt hole, the cartridge case being provided to surround the cartridge stack, the ICB housing and the cooling plate. It is done.

Preferably, the module case further comprises an opening formed in the main body of the module case so that at least a portion of the plate body is exposed to the outside.

Battery pack according to another aspect of the present invention for solving the above problems is characterized in that it comprises the above-described battery module.

An automobile according to another aspect of the present invention for solving the above problems is characterized in that it comprises the aforementioned automobile.

The battery module and the battery pack including the same according to the present invention can simultaneously assemble a plurality of members using one bolt, thereby reducing the number of bolts required for assembling the battery module and shortening the assembly time of the battery module. .

1 is an exploded perspective view of a battery module according to a preferred embodiment of the present invention.
2 is a perspective view of the cartridge stack and ICB housing shown in FIG.
3 is a partially enlarged cross-sectional view taken along line II ′ of the cartridge stack and ICB housing shown in FIG. 2;
4 is a diagram illustrating a schematic configuration of a secondary battery illustrated in FIG. 2.
FIG. 5 is a partially enlarged view of area A of FIG. 2; FIG.
FIG. 6 is an exploded perspective view of the cooling plate and the sensing connector assembly shown in FIG. 1. FIG.
7 is a perspective view of the cooling plate and the sensing connector assembly shown in FIG.
8 is a perspective view of the cartridge stack and cooling plate shown in FIG.
9A is a front perspective view of the sensing housing shown in FIG. 7.
9B is a rear perspective view of the sensing housing shown in FIG. 7.
10 is an enlarged cross-sectional view taken along line II-II ′ of FIG. 8.
FIG. 11 is a rear perspective view of the ICB cover shown in FIG. 1. FIG.
12 is a perspective view of a combination of the battery module showing a state in which the ICB cover shown in Figure 1 is installed.
13 is a perspective view of a combination of the battery module showing a state in which the module case shown in Figure 1 installed.
14 is a perspective view of the upper case shown in FIG.
15 is a perspective view of the lower case shown in FIG.
FIG. 16 is a bottom view of the battery module shown in FIG. 13. FIG.
FIG. 17 is a partially enlarged cross-sectional view taken along line III-III ′ of the battery module shown in FIG. 13; FIG.
FIG. 18 is a partially enlarged cross-sectional view taken along line IV-IV 'of the battery module shown in FIG. 13; FIG.

The terms or words used in this specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

In the drawings, the size of each component or a specific portion constituting the components is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. Thus, the size of each component does not entirely reflect its actual size. If it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, such description will be omitted.

1 is an exploded perspective view of a battery module according to a preferred embodiment of the present invention.

Referring to FIG. 1, a battery module 1 according to a preferred embodiment of the present invention includes a cartridge stack 10 having a plurality of cartridges 14 each containing a secondary battery 12; An ICB housing 20 having a bus bar 23 electrically connected to the electrode leads 16 and coupled to one surface of the cartridge stack 10; A connection connector assembly 30 connected to an external measurement circuit and coupled to the ICB housing 20; A cooling plate 40 cooling the secondary batteries 12 and coupled to the other surface of the cartridge stack 10; And a sensing housing 52 that is fastened and connected to the bus bar 23 of the ICB housing 20, and a sensing connector 54 that is fastened and connected to the connecting connector assembly 30, and coupled to the cooling plate 40. Sensing connector assembly 50; An ICB cover 60 coupled to the ICB housing 20 to surround the ICB housing 20; It includes; module case forming the appearance of the battery module (1).

In addition, a plurality of battery modules 1 may be connected by a predetermined electrical connection method to configure a battery pack. In addition, such a battery pack may be installed and used in an automobile.

In addition, the battery module 1, as shown in FIG. 1, has a pair of ICB housings 20 and a pair of sensing housings 52, and an ICB housing 20 and a sensing housing 52. The front and rear are each installed one by one symmetrical structure. Therefore, for convenience of description, the structure of the battery module 1 will be described below with reference to the front surface of the battery module 1.

FIG. 2 is a perspective view of the cartridge stack and ICB housing shown in FIG. 1, FIG. 3 is a partially enlarged cross-sectional view taken along line II ′ of the cartridge stack and ICB housing shown in FIG. 2, and FIG. 4 is a view of FIG. It is a figure which shows schematic structure of the secondary battery shown in FIG. 2, and FIG. 5 is an enlarged view of the area A of FIG.

First, the cartridge stack 10 is a member for accommodating a plurality of secondary batteries 12.

As shown in FIG. 2, the cartridge stack 10 is integrated with the ICB housing 20 by the ICB housing 20 coupled to the front and rear surfaces, respectively. As shown in FIG. 3, the cartridge stack 10 includes a plurality of cartridges 12 and a plurality of cartridges respectively accommodating at least one secondary battery 12 of the secondary batteries 12. And (14).

The secondary batteries 12 are preferably composed of lithium polymer batteries. However, the present invention is not limited thereto, and the secondary batteries 12 may be formed of a lithium ion battery, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, or the like.

The secondary batteries 12 are preferably configured in a pouch type, as shown in FIG. However, the present invention is not limited thereto, and the secondary batteries 12 may be formed in a cylindrical shape, a square shape, or the like.

The secondary batteries 12 include a pair of electrode leads 16, as shown in FIG. 4. One of the electrode leads 16 is provided at one end of the secondary battery 12 and has a polarity of any one of a positive electrode and a negative electrode. One of the electrode leads 16 is provided at the other end of the secondary battery 12 opposite to one end of the secondary battery 12 and has a polarity of the other of the positive electrode and the negative electrode.

The cartridges 14 each receive and hold these secondary batteries 12 such that the electrode leads 16 protrude out of the cartridge 14, as shown in FIG. 3. Thus, the secondary batteries 12 are prevented from flowing by these cartridges 14.

The cartridges 14 are configured to be stackable with each other to facilitate stacking and assembly of the secondary batteries 12. Thus, the cartridges 14 are stacked in multiple stages to form the cartridge stack 10.

Next, the ICB housing 20 is a member for electrically connecting the secondary batteries 12.

As shown in FIG. 2, the ICB housing 20 includes a lead hole 21 perforated so that the electrode leads 16 of the secondary cells 12 pass, and a secondary battery 12 that passes through the lead holes 21. Bus-bar 23 electrically connected to the electrode leads 16 of the < RTI ID = 0.0 >), < / RTI > a fixed bush 25 protruding downward toward the cartridge stack 10, and a bolt B having a predetermined size. And a first bolt hole 27 drilled in the fixing bush 25 to be screwed to the threaded portion S.

As shown in FIG. 3, the ICB housing 20 is provided with a pair so that the electrode leads 16 of the secondary batteries 12 may pass through the lead holes 21, respectively. It is mounted on the back respectively.

As shown in FIG. 2, the lead holes 21 are perforated at a predetermined interval so that the electrodes of the secondary batteries 12 can pass therethrough.

The bus bar 23 is mounted on the outer surface of the ICB housing 20 to surround at least a portion of the lead holes 21, as shown in FIG. 2. The number of installations of the bus bars 23 is not particularly limited, and at least one bus bar 23 may be installed according to the method of electrically connecting the secondary batteries 12 and the bus bars 23.

At least one of the bus bars 23 includes a connection tab 29 mounted to the lower end, as shown in FIG. The connection tab 29 includes a connection pin 29a which protrudes toward the lower side of the cartridge stack 10, that is, toward the cooling plate 40. The number of installation of the connection tabs 29 is not particularly limited, and at least one connection tab 29 may be installed according to the electrical connection method of the secondary batteries 12. For example, as shown in FIG. 2, the connection tab 29 may be provided only on the bus bars 23 of some of the bus bars 23.

Such a bus bar 23 is electrically connected to the electrode lead 16 of the secondary batteries 12 at a predetermined connection point P, as shown in FIG. 5. To this end, as shown in FIG. 5, the electrode lead 16 is formed by bending an end portion protruding to the outside of the ICB housing 20 through the lead hole 21 and at the connection point P described above. A bent portion 16a connected to 23 is included.

As shown in FIG. 2, the fixing bush 25 protrudes from the lower end of the ICB housing 20 to face downward of the cartridge stack 10, that is, toward the cooling plate 40. As shown in FIG. 2, a plurality of such fixed bushes 25 are formed at predetermined intervals.

As shown in FIG. 2, the first bolt hole 27 is drilled in at least one of the fixing bushes 25 toward the lower side of the cartridge stack 10, that is, toward the cooling plate 40. . The first bolt hole 27 is provided with a thread along the inner circumferential surface such that the first bolt hole 27 is screwed into the threaded portion S of the bolt B having a predetermined size. Here, the kind of the bolt B is not particularly limited, and a general bolt having a threaded portion S and a bolt head H provided at one end of the threaded portion S may be used as the bolt B. .

Next, the connection connector assembly 30 is a member that connects the battery module 1 with an external measurement circuit.

As shown in FIG. 2, the connecting connector assembly 30 may be connected to and connected to a sub connector 32 that is fastened and connected to the sensing connector 54 of the sensing connector assembly 50, and a circuit connector of the measurement circuit. A main connector 34 and a connecting wire 36 for electrically connecting the sub connector 32 and the main connector 34. The connecting connector assembly 30 has an ICB such that the sub connector 32 is disposed under the ICB housing 20 and the main connector 34 is disposed above the ICB housing 20, as shown in FIG. 2. It is fixedly installed on the outer surface of the housing 20. This connecting connector assembly 30 is connected to the sub connector 32 by the sensing connector 54 of the sensing connector assembly 50 is connected and connected, and the main connector 34 is fastened and connected to the circuit connector of the measurement circuit, The connector assembly 50 and the measurement circuit can be electrically connected.

FIG. 6 is an exploded perspective view of the cooling plate and the sensing connector assembly of FIG. 1, FIG. 7 is a perspective view of the cooling plate and the sensing connector assembly of FIG. 6, and FIG. 8 is a cartridge stack of FIG. The combined perspective view of a cooling plate.

Next, it is a member for dissipating heat generated in the cooling plate 40 and the secondary batteries 12 to the outside.

As shown in FIG. 6, the cooling plate 40 includes a plate body 42 formed to face the cartridges 14, a coupling portion 44 formed to face the ICB housing 20, and a bolt. And a second bolt hole 48 screwed into the threaded portion S of B) and perforated in the coupling portion 44 to be disposed in line with the first bolt hole 27.

The plate body 42 has a flat plate shape which is in contact with the cartridges 14 when the cooling plate 40 is coupled to the lower surface of the cartridge stack 10.

The engaging portion 44 extends from the end of the main body of the plate. As shown in FIG. 6, the coupling part 44 protrudes from the upper side of the cartridge stack 10, that is, toward the first bolt hole 27 of the ICB housing 20. And projections 46.

The first protrusion 46 has a round shape that protrudes convexly toward the first bolt hole 27, and the first bolt hole 27 when the cooling plate 40 is coupled to the cartridge stack 10. It is formed in a position corresponding to the first bolt hole 27 so as to face (see Fig. 17). The number of formation of the first protrusions 46 and the formation interval are not particularly limited, and the first protrusions 46 are formed at the same interval as the first bolt holes 27 and the same number as the first bolt holes 27. do.

As shown in FIG. 6, the second bolt holes 48 are drilled in the respective first protrusions 46 to be screwed with the threaded portions S of the bolts B. As shown in FIG. In addition, the second bolt hole 48 is drilled to be disposed in line with the first bolt hole 27 when the cooling plate 40 is coupled to the cartridge stack 10 (see FIG. 17). The number and formation intervals of the second bolt holes 48 are not particularly limited, and the second bolt holes 48 have the same number as the first bolt holes 27 and the formation intervals of the first bolt holes 27. It is formed at equal intervals.

The cooling plate 40 is coupled to be integral with the sensing connector assembly 50, as shown in FIG. In addition, the integrally coupled cooling plate 40 assembled with the sensing connector 54 has a lower surface of the cartridge 14 assembly such that the plate body 42 contacts the cartridges 14, as shown in FIG. Is mounted on. Then, heat generated in the secondary batteries 12 is transferred to the plate body 42 through the cartridges 14, and the cooling plate 40 discharges the heat transferred from the secondary batteries 12 to the outside to the secondary battery. Cool down (12).

Next, the sensing connector assembly 50 is a member for sensing the voltage of the secondary batteries 12.

As illustrated in FIG. 6, the sensing connector assembly 50 includes a sensing housing 52 coupled and connected to the connection pin 29a of the bus bar 23, and a sub connector 32 of the connection connector assembly 30. And a sensing connector 54 that is fastened and connected to the sensing connector 54, and a sensing wire 56 that electrically connects the sensing housing 52 and the sensing connector 54.

FIG. 9A is a front perspective view of the sensing housing illustrated in FIG. 7, and FIG. 9B is a rear perspective view of the sensing housing illustrated in FIG. 7, and FIG. 10 is an enlarged cross-sectional view taken along line II-II ′ of FIG. 8.

The sensing housing 52 includes a connection hole 52a into which the connecting pin 29a of the bus bar 23 is inserted, a connector fitting groove 52b into which the sensing connector 54 is fitted, and the sensing housing 52. The housing coupling rib 52c provided to be coupled to the coupling part 44 of the housing coupling rib, and the housing coupling rib 52c so that the threaded portion S of the bolt B passes and is disposed in line with the first bolt hole 27. The first guide hole 52d perforated in the housing, the housing pedestal 52e provided to support the sensing housing 52, and the threaded portion S of the bolt B pass through and are in a straight line with the first bolt hole 27. A receptacle mounted inside the connection hole 52a to engage and connect with the second guide hole 52f drilled into the housing pedestal 52e and the connection pin 29a inserted into the connection hole 52a so as to be disposed thereon. (52g).

The connection hole 52a is drilled to penetrate the sensing housing 52 in the vertical direction, as shown in FIG. 9A. The connection hole 52a has a predetermined shape so that the connection pin 29a and the receptacle 52g are inserted and fixed, respectively.

The connection holes 52a are formed in number with the connection tabs 29. For example, when one connection tab 29 is provided, as shown in FIG. 9A, one connection hole 52a may be formed correspondingly.

As shown in FIG. 9A, the connector fitting groove 52b is recessed at a predetermined engagement position of the front surface of the sensing housing 52 so as to have a shape corresponding to the sensing connector 54. The coupling position of the sensing housing 52 is a sensing connector 54 which is fitted into the connector fitting groove 52b when the cooling plate 40 integrally coupled with the sensing connector 54 is coupled to the cartridge stack 10. ) Refers to a position where the sub connector 32 coupled to the ICB housing 20 is fastened and coupled.

As illustrated in FIG. 9B, the housing coupling rib 52c may include the sensing housing 52 from the rear surface of the sensing housing 52 such that at least a portion of the housing coupling rib 52c is interposed between the first bolt hole 27 and the second bolt hole 48. Protrude in the rearward direction. The housing engagement rib 52c corresponds to the thickness of the housing pedestal 52e and the engagement portion 44 so as to fit the engagement portion 44 in the gap between the housing engagement rib 52c and the housing pedestal 52e. It is formed so as to be spaced apart.

The number of formation of such a housing coupling rib 52c is not specifically limited. For example, the housing coupling ribs 52c may be formed at a plurality of predetermined intervals, as shown in FIG. 9B. In addition, when the plurality of housing coupling ribs 52c are formed as described above, at least one of the housing coupling ribs 52c is formed to be interposed between the first bolt hole 27 and the second bolt hole 48. (See Figure 17).

As shown in FIG. 9B, the first guide hole 52d is drilled into the housing coupling rib 52c such that the threaded portion S of the bolt B passes and is disposed in line with the first bolt hole 27. (See FIG. 17). The first guide hole 52d has a relatively larger diameter than the threaded portion S of the bolt B so that the threaded portion S of the bolt B can pass through as it is.

As shown in FIG. 9B, the housing pedestal 52e extends toward the rear side of the sensing housing 52 at the lower end of the sensing housing 52 so as to support the sensing housing 52.

As shown in FIG. 9B, the second guide hole 52f is drilled in the housing pedestal 52e such that the threaded portion S of the bolt B passes and is disposed in line with the first bolt hole 27. (See Figure 17). The second guide hole 52f has a threaded portion S of the bolt B such that the threaded portion S of the bolt B is passed as it is and a second protrusion 84 of the lower case 80 to be described later is inserted therein. ) And a relatively larger diameter than the second protrusion 84 of the lower case 80 (see FIG. 17).

As shown in FIG. 10, the receptacle 52g is mounted and installed inside the connection hole 52a to be engaged and connected to the connection pin 29a inserted into the connection hole 52a. The receptacle 52g preferably has a clip structure that can be clipped to the connecting pin 29a, but is not limited thereto. 52 g of receptacles are provided the same number as the connection hole 52a. For example, when one connection hole 52a is provided in the sensing housing 52, one receptacle 52g may be provided correspondingly. The receptacle 52g may be electrically connected to the electrode lead 16 of the secondary batteries 12 through the bus bar 23, thereby sensing the voltage of the secondary batteries 12.

The sensing housing 52, as shown in FIG. 10, is temporarily coupled to the cooling plate 40 by coupling the coupling portion 44 to a gap between the housing coupling rib 52c and the housing pedestal 52e. do. Temporary coupling of the sensing housing 52 and the cooling plate 40 means that the coupling portion 44 and the housing coupling rib 52c before the coupling of the sensing housing 52 and the cooling plate 40 with the bolt B are performed. And pre-combining the sensing housing 52 and the cooling plate 40 by fitting the housing pedestal 52e.

The sensing connector 54 is fitted and fitted into the connector fitting groove 52b of the sensing housing 52. The sensing connector 54 is fastened and connected with the sub connector 32 of the connection connector assembly 30, as shown in FIG. 8, and is electrically connected to the measurement circuit by the connection connector assembly 30. Then, the measurement circuit may receive the voltage sensed by the receptacle 52g through the connection connector assembly 30 and measure the voltage of the secondary batteries 12.

As illustrated in FIG. 10, the sensing wire 56 has one end coupled and connected to the receptacle 52g and the other end coupled and connected to the sensing connector 54, such that the receptacle 52g and the sensing connector 54 are connected. Can be electrically connected. The sensing wires 56 may be provided with the same number of receptacles 52g, and may individually connect each receptacle 52g with the sensing connector 54.

The sensing connector assembly 50 is attached to the cartridge stack 10 which is integrally coupled with the ICB housing 20 and the ICB housing 20 by the clip coupling of the connecting pin 29a and the receptacle 52g described above. Sums up. Provisional coupling of the sensing connector assembly 50 and the ICB housing 20 means that the connecting pin 29a and the receptacle 52g before the coupling between the sensing connector assembly 50 and the ICB housing 20 using the bolt B. Refers to the preliminary coupling of the sensing connector assembly 50 and the ICB housing 20 using a clip coupling of the). In addition, when the sensing connector assembly 50 and the ICB housing 20 are coupled as described above, the cooling plate 40 coupled with the sensing housing 52 also has the ICB housing 20 and the sensing housing 52 as a medium. It is temporarily coupled with the cartridge stack 10 integrally coupled with the ICB housing 20.

11 is a rear perspective view of the ICB cover illustrated in FIG. 1, and FIG. 12 is a combined perspective view of the battery module illustrating a state in which the ICB cover illustrated in FIG. 1 is installed.

Next, the ICB cover 60 is a member for protecting the ICB housing 20 from the outside.

As illustrated in FIG. 11, the ICB cover 60 includes a cover body 61 provided to surround at least a portion of the ICB housing 20, and the first bolt hole 27 of the ICB housing 20 and cooling. The cover coupling rib 62 extending from the cover main body 61 so as to be interposed between the second bolt holes 48 of the plate 40 and the threaded portion S of the bolt B passes through the first bolt hole ( 27, a third guide hole 63 perforated in the cover coupling rib 62, a cover pedestal 64 formed to support the ICB cover 60, and a threaded portion of the bolt B. And a fourth guide hole 65 perforated in the cover pedestal 64 so that S) passes and is disposed in line with the first bolt hole 27.

The cover body 61 is provided to surround at least a portion of the front and side surfaces of the ICB housing 20, as shown in FIG. 11. Such a cover main body 61 can protect the connection site | part of the bus bar 23 and the sensing housing 52 from the exterior.

As shown in FIG. 11, the cover engagement rib 62 is interposed between the first bolt hole 27 and the second bolt hole 48 and covers the cover pedestal by an interval corresponding to the thickness of the coupling part 44. It protrudes in the rearward direction of the cover main body 61 from the back surface of the cover main body 61 so that it may be spaced apart from 64 (refer FIG. 18).

However, as described above, the housing coupling rib 52c of the sensing housing 52 is also formed to be interposed between the first bolt hole 27 and the second bolt hole 48. Accordingly, the cover coupling rib 62 is interposed between the housing coupling ribs 52c and the housing coupling ribs 52c during the gap between the first bolt holes 27 and the second bolt holes 48 so as not to interfere with the housing coupling ribs 52c. It is formed so as to be interposed in the gap between the first bolt hole 27 and the second bolt hole 48 (see Fig. 18).

The number of formation of such cover engagement ribs 62 is not specifically limited. For example, as illustrated in FIG. 11, a plurality of cover engagement ribs 62 may be formed at predetermined intervals.

As shown in FIG. 11, the third guide hole 63 is drilled in the cover coupling rib 62 so that the threaded portion S of the bolt B passes and is disposed in line with the first bolt hole 27. do. The third guide hole 63 has a diameter relatively larger than the threaded portion S of the bolt B so that the threaded portion S of the bolt B passes as it is (see FIG. 18).

As shown in FIG. 11, the cover pedestal 64 extends from the lower end of the cover body 61 toward the rear side of the ICB cover 60 so as to support the ICB cover 60. The cover pedestal 64 may include an opening 66 in which at least a portion of the sensing housing 52 is open so as to be exposed to the outside of the ICB cover 60 and the protective cap 90 is mounted.

As shown in FIG. 11, the fourth guide hole 65 is drilled in the cover pedestal 64 so that the threaded portion S of the bolt B passes and is disposed in line with the first bolt hole 27. . The fourth guide hole 65 has the threaded portion S of the bolt B so that the threaded portion S of the bolt B is passed as it is, and the second protrusion 84 of the lower case 80 to be described later is inserted therein. And a relatively larger diameter than the second protrusion 84 of the lower case 80 (see FIG. 18).

12, the cover body 61 surrounds the ICB housing 20 and the sensing housing 52, and the cover coupling rib 62 has the first bolt hole 27 as shown in FIG. 12. The cartridge stack 10 is mounted in the horizontal direction of the cartridge stack 10 so as to be interposed between the second bolt hole 48 and the second bolt hole 48. Then, the ICB cover 60, the coupling portion 44 is fitted into the gap between the cover coupling rib 62 and the cover pedestal 64, the ICB is coupled to the cooling plate 40 and the cooling plate 40 is It is temporarily coupled with the housing 20 (see FIG. 18). Since the ICB cover 60 is mounted in the ICB housing 20 in the horizontal direction of the cartridge stack 10, the ICB cover 60 is mounted in the ICB housing 20 in the vertical direction of the cartridge stack 10. Compared to the case, since the members provided on the outer surface of the ICB cover 60 and the ICB housing 20 are prevented from interfering with each other, the volume of the ICB cover 60 can be reduced.

FIG. 13 is a perspective view illustrating a battery module in which the module case illustrated in FIG. 1 is installed, FIG. 14 is a perspective view of the upper case illustrated in FIG. 1, and FIG. 15 is a perspective view of the lower case illustrated in FIG. 1.

Next, the module case is a member for protecting the battery module 1 from the outside.

As shown in FIG. 13, the module case is installed to accommodate at least a portion of the battery module 1 to protect members of the battery module 1 from the outside. The module case includes an upper case 70 provided to accommodate the upper portion of the battery module 1 and a lower case 80 provided to accommodate the lower portion of the battery module 1.

As illustrated in FIG. 14, the upper case 70 opens an accommodating space 72 in which an upper portion of the battery module 1 is accommodated, and an upper portion of the battery module 1 in an accommodating space 72. A module insertion hole 74 formed therein, at least one connector / terminal insertion hole 76 formed to be open so that the main connector 34 and the power supply terminal 28 are exposed to the outside of the upper case 70, and a lower case to be described later. At least one engaging hook 78 protruding to be elastically coupled to the hook hole of the 80.

As shown in FIG. 13, the upper case 70 is installed such that an upper portion of the battery module 1 is inserted into and accommodated in the accommodation space 72 through the module insertion hole 74. Then, the members provided on the upper part of the battery module 1 are protected from the outside by such an upper case 70, and the external measuring circuit or the external electric device is connected to the main connector 34 through the connector / terminal insertion hole 76. Or it may be electrically connected to the power supply terminal 28.

As illustrated in FIG. 15, the lower case 80 opens an accommodating space 81 in which a lower portion of the battery module 1 is accommodated and a lower portion of the battery module 1 in an accommodating space 81. A module insertion hole 82 formed therein, a heat discharge port 83 formed to be open so that the plate body 42 is exposed to the outside of the lower case 80, a second guide hole 52f of the sensing housing 52, and A plurality of second protrusions 84 protrudingly formed to be inserted into the fourth guide hole 65 of the ICB cover 60, and screwed with the bolt B and arranged in a straight line with the first bolt hole 27. And a third bolt hole 85 drilled in each of the second protrusions 84 and at least one hook hole 87 provided to be elastically coupled to the coupling hook 78 of the upper case 70.

As shown in FIG. 15, the second protrusion 84 protrudes from the bottom surface of the lower case 80 toward the upper direction of the cartridge stack 10. More specifically, the plurality of second protrusions 84 are formed at the same interval as the formation interval of the first bolt holes 27 described above, and the second guide hole 52f and the ICB cover of the sensing housing 52 are formed. It has a relatively small diameter compared with the 2nd guide hole 52f and the 4th guide hole 65 so that it may respectively insert into the 4th guide hole 65 of 60 (refer FIG. 17 and FIG. 18). In addition, as shown in FIG. 15, the third bolt holes 85 are drilled one by one for each of the second protrusions 84 so as to be screwed with the bolts B and disposed in line with the first bolt holes 27. (See FIG. 17 and FIG. 18).

The lower case 80, as shown in FIG. 13, is installed such that the lower portion of the battery module 1 is inserted into and received in the accommodation space 81 through the module insertion hole 82, and the coupling hook 78. It is coupled to the upper case 70 by hook coupling of the hook hole 87. Then, the members provided in the lower part of the battery module 1 are protected from the outside by the lower case 80, and the heat transferred from the secondary batteries 12 to the plate body 42 is the heat discharge port 83 Is emitted through the outside.

FIG. 16 is a bottom view of the battery module illustrated in FIG. 13, and FIG. 17 is a partially enlarged cross-sectional view taken along line III-III ′ of the battery module illustrated in FIG. 13, and FIG. 18 is a IV of the battery module illustrated in FIG. 13. Partial enlarged cross-sectional view of line -IV '.

As shown in FIG. 16, the third bolt hole 85 of the above-described bolt holes 27, 48, 85 and guide holes 52d, 52f, 63, 65 is a battery module ( Since it is provided in the lower case 80 disposed at the outermost part of 1), it is exposed to the outside of the battery module (1). Therefore, as shown in FIG. 16, each of the above-described bolt holes 27, 48, 85 and guide holes 52d, 52f, 63, 65 through the third bolt hole 85, respectively. The threaded portion S of the bolt B can be inserted into it.

In addition, the third bolt hole 85 of any one of the third bolt holes 85 may have the second guide hole 52f, the second bolt hole 48, and the first guide hole ( 52d) and the first bolt hole 27 in a straight line. That is, some of the first bolt holes 27 may be provided such that the first guide holes 52d, the second bolt holes 48, and the second guide holes 52f are disposed in a straight line. Therefore, as shown in FIG. 17, the threaded portion S of the bolt B may include any of the third bolt holes 85, the second guide holes 52f, the second bolt holes 48, and the first bolt holes 48. The first guide hole 52d and the first bolt hole 27 are sequentially inserted.

In addition, the third bolt hole 85 of the other part of the third bolt holes 85 may have the fourth guide hole 65, the second bolt hole 48, and the third guide hole ( 63) and the first bolt hole 27 in a straight line. That is, the other first bolt hole 27 may be provided such that the third guide hole 63, the second bolt hole 48, and the fourth guide hole 65 are disposed in a straight line. Therefore, as shown in FIG. 18, the threaded portion S of the bolt B may include the third bolt hole 85, the fourth guide hole 65, the second bolt hole 48, and the other part of the bolt. The guide hole 63 and the first bolt hole 27 are sequentially inserted.

Then, the fixing bush 25 of the ICB housing 20 in which the bolt holes 27, 48, 85 are drilled, the coupling part 44 of the cooling plate 40, and the lower case 80 are bolts B. Is tightened by tightening. In addition, the housing coupling rib 52c in which the first guide hole 52d is drilled is fastened and coupled by the fixing bush 25 of the ICB housing 20 and the coupling portion 44 of the cooling plate 40. The housing pedestal 52e in which the guide hole 52f is perforated is tightened and coupled by the coupling part 44 of the cooling plate 40 and the lower case 80. Therefore, the ICB housing 20, the cooling plate 40, the sensing housing 52 and the lower case 80 are simultaneously coupled by the bolts B. In addition, the cover coupling rib 62 in which the third guide hole 63 is drilled is tightened by the fixing bush 25 of the ICB housing 20 and the coupling portion 44 of the cooling plate 40. The cover pedestal 64 in which the guide hole 65 is perforated is tightened and coupled by the coupling part 44 of the cooling plate 40 of the ICB housing 20 and the lower case 80. Thus, the ICB housing 20, the cooling plate 40, the ICB cover 60 and the lower case 80 are simultaneously coupled by bolts B.

As such, the battery module 1 has a structure capable of simultaneously coupling a plurality of members by using the bolt B. FIG. Therefore, since the battery module 1 can reduce the number of bolts B necessary for assembly, it is possible to reduce the cost required to prepare bolts B for assembly, and in the case of combining a plurality of members individually, In comparison, the time required for assembly can be reduced.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

1: battery module
10: cartridge stack
12: secondary battery
14: cartridge
16: electrode lead
20: ICB housing
21: lead hole
23: busbar
25: fixed bush
27: first bolt hole
29: Connection tab
30: connecting connector assembly
32: sub connector
34: main connector
36: connection wire
40: cooling plate
42: plate body
44: coupling part
46: first protrusion
48: second bolt hole
50: sensing connector assembly
52: sensing housing
52a: connection hole
52b: Connector fitting groove
52c: Housing Combined Rib
52d: first guide hole
52e: Housing Pedestal
52f: 2nd guide hole
52g: Receptacle
54: sensing connector
56: sensing wire
60: ICB Cover
61: cover body
62: cover coupling rib
63: third guide hole
64: cover base
65: 4th guide hall
66: opening
70: upper case
72: upper storage space
74: module insertion hole
76: connector / terminal insertion hole
78: coupling hook
80: lower case
81: lower storage space
82: module insertion hole
83: heat release port
84: second protrusion
85: third bolt hole
87: Hook Hull
90: protective cap

Claims (12)

A cartridge stack including a plurality of secondary batteries each having an electrode lead, and a plurality of cartridges each accommodating at least one secondary battery of the secondary batteries and stacked in multiple stages;
An ICB housing having a bus bar to which the electrode leads are connected and coupled to one surface of the cartridge stack; And
A cooling plate coupled to the other surface of the cartridge stack having a plate body formed to face the cartridge stack and a coupling part formed to face the ICB housing, and contacting one surface of the cartridge stack at a predetermined angle. Includes;
The ICB housing further includes a first bolt hole bored to be screwed into the threaded portion of the bolt having a predetermined size,
The cooling plate further includes a second bolt hole which is screwed with the threaded portion and bored in the coupling portion to be disposed in line with the first bolt hole.
The cooling plate further includes a fixing bush protruding to face toward the cooling plate and having the first bolt hole drilled therein.
The bus bar has a connecting pin protruding toward the cooling plate,
And a connection hole into which the connection pin is inserted, and a receptacle mounted inside the connection hole to be connected to the connection pin, and further comprising a sensing housing coupled to the coupling part.
The sensing housing may include a housing coupling rib formed to have at least a portion interposed between the first bolt hole and the second bolt hole, and the housing coupling rib to pass through the screw portion and to be disposed in line with the first bolt hole. Further provided with a first guide hole drilled in,
The sensing housing further includes a housing pedestal formed to support the sensing housing, and a second guide hole perforated in the housing pedestal so that the screw portion passes and is disposed in line with the first bolt hole.
The housing coupling rib and the housing pedestal are formed to be spaced apart by an interval corresponding to the thickness of the coupling part such that the coupling part is fitted into the space between the housing pedestal and the housing coupling rib,
A cover body provided to surround at least a portion of the ICB housing, a cover coupling rib extending from the cover body such that at least a portion is interposed between the first bolt hole and the second bolt hole, and the screw portion is passed through And an ICB cover having a third guide hole drilled in the cover coupling rib to be disposed in line with the first bolt hole.
The ICB cover further includes a cover pedestal formed to support the ICB cover, and a fourth guide hole perforated in the cover pedestal so that the screw portion passes and is disposed in line with the first bolt hole.
Some of the first bolt holes are provided such that the first guide hole, the second bolt hole, and the second guide hole are arranged in a straight line,
The battery module of claim 1, wherein the first bolt hole is provided such that the third guide hole, the second bolt hole, and the fourth guide hole are arranged in a straight line. delete delete delete delete delete delete delete The method of claim 1,
And a third bolt hole screwed with the threaded portion and perforated to be disposed in line with the first bolt hole, the module case being provided to surround the cartridge stack, the ICB housing, and the cooling plate. Battery module, characterized in that. The method of claim 9,
The module case further comprises an opening formed in the main body of the module case so that at least a portion of the plate body is exposed to the outside. A battery pack comprising the battery module according to any one of claims 1 to 10. An automobile comprising the battery pack according to claim 11.

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