KR102032504B1 - Battery Module improved impact resistance - Google Patents

Battery Module improved impact resistance Download PDF

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Publication number
KR102032504B1
KR102032504B1 KR1020150155938A KR20150155938A KR102032504B1 KR 102032504 B1 KR102032504 B1 KR 102032504B1 KR 1020150155938 A KR1020150155938 A KR 1020150155938A KR 20150155938 A KR20150155938 A KR 20150155938A KR 102032504 B1 KR102032504 B1 KR 102032504B1
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KR
South Korea
Prior art keywords
sensing
assembly
plate
battery
battery module
Prior art date
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KR1020150155938A
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Korean (ko)
Other versions
KR20170053429A (en
Inventor
서재현
김남인
엄영섭
김보현
조현영
Original Assignee
주식회사 엘지화학
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Priority to KR1020150155938A priority Critical patent/KR102032504B1/en
Publication of KR20170053429A publication Critical patent/KR20170053429A/en
Application granted granted Critical
Publication of KR102032504B1 publication Critical patent/KR102032504B1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48Accumulators combined with arrangements for measuring, testing or indicating condition, e.g. level or density of the electrolyte
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • H01M2/1072Cabinets, cases, fixing devices, adapters, racks or battery packs for starting, lighting or ignition batteries; Vehicle traction batteries; Stationary or load leading batteries
    • H01M2/1083Fixing on vehicles
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/22Fixed connections, i.e. not intended for disconnection
    • H01M2/26Electrode connections
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • Y02E60/12

Abstract

A battery module according to an aspect of the present invention includes a secondary battery, a stacking frame for accommodating the secondary battery, a plurality of cartridge assemblies stacked in one direction, and at least one side portion from which electrodes of the plurality of cartridge assemblies protrude. A sensing assembly and a rigid material mounted to the electrode lead and sensing the electrical characteristics of the secondary battery in contact with the electrode lead of the secondary battery, and having a through hole formed in a vertical direction. The cover is configured to cover the assembly from top to bottom, having a through-hole communicating with the through-hole of the sensing assembly, the rod-like fastening member is fitted into the through-hole and the through-hole end is assembled into the sensing assembly and one body A plate assembly.

Description

Battery module improved impact resistance

The present invention relates to a battery module, and more particularly to a battery module having a mounting reinforcing structure excellent in impact resistance.

Recently, secondary batteries have been widely applied to electric vehicles (EVs), hybrid electric vehicles (HEVs), and power storage systems (Energy Storage Systems) that are driven by electric driving sources as well as portable devices. The secondary battery is attracting attention as a new energy source for improving eco-friendliness and energy efficiency in that not only the primary advantage of significantly reducing the use of fossil fuels is generated, but also no by-products of energy use are generated.

In particular, a battery pack applied to an electric vehicle has a structure in which a plurality of battery modules including a plurality of unit cells are connected in series and / or in parallel in order to obtain high power. Here, the unit cell may be repeatedly charged and discharged by an electrochemical reaction between components, including a positive electrode and a negative electrode current collector, a separator, an active material, an electrolyte, and the like.

On the other hand, in recent years, as the regulatory movement on carbon emissions has accelerated in major automobile producing countries such as Europe, the United States, and Korea, interest in environment-friendly and pure electric vehicles is increasing.

Pure electric vehicles (EVs) use the electrical energy of a battery entirely. For this reason, the development of high capacity battery pack products is increasing, and the battery modules constituting the recent high capacity battery packs have increased in size and weight than conventional battery modules. As battery modules increase in size and weight, there is a greater need to reinforce structural stability for stable energy storage and operation. In particular, since the battery module is operated in a vehicle driving environment subjected to shock and vibration, it is necessary to enhance the rigidity of the mounting portion between the battery module and the pack case or components of the battery module in order to ensure structural safety of the battery module.

The present invention has been made in view of the above-described problems, and provides a battery module having improved structural stability by increasing the rigidity of a mounting portion between components of the battery module.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

Battery module according to an aspect of the present invention, a secondary battery, and a plurality of cartridge assembly having a stacking frame for accommodating the secondary battery, stacked in one direction; A sensing assembly mounted to at least one side surface of the plurality of cartridge assemblies, the sensing assembly contacting an electrode lead of the secondary battery to sense electrical characteristics of the secondary battery, and having a through hole formed in a vertical direction; And a rigid material, and configured to cover the plurality of cartridge assemblies and the sensing assembly from top to bottom, and having a through hole communicating with a through hole of the sensing assembly, wherein the through hole and the through hole have a rod shape. The fastening member may include an end plate assembly assembled with the sensing assembly and one body.

The sensing assembly includes a sensing board having a connection member electrically connected to an electrode lead of the secondary battery, and a sensing board cover mounted on an outer side of the sensing board to protect the sensing board. It may be formed on the cover for the sensing board.

Two through-holes are formed at one edge of each side of the cover for the sensing board, and the cover for the sensing board may include a plurality of layered ribs arranged in layers at predetermined intervals along the height direction of the through-hole. Can be.

The sensing board cover may further include a plurality of lattice ribs forming a lattice structure between the two through holes.

At least one of the layered ribs and the lattice ribs may be formed on both the front and the rear of the cover for the sensing board.

The sensing assembly may be mounted to the left side and the right side of the plurality of cartridge assemblies, and the end plate assembly may include a first end plate formed to integrally surround the top, front, and rear parts of the plurality of cartridge assemblies. And, it may include a pair of second end plate provided in a form surrounding the sensing assembly.

The second end plate may include a fastening flange positioned above the through hole of the sensing assembly, and the through hole may be formed in the fastening flange.

The first end plate and the second end plate may have welding sites welded or bonded to each other.

The rod-type fastening member may include a metal bushing inserted into the through hole in a hollow pipe type, and a long bolt passing through the bushing to assemble the end plate assembly and the sensing assembly into one body. have.

The sensing assembly may be detachably coupled to cover the entirety of one side portion of the plurality of cartridge assemblies.

The plurality of cartridge assemblies may include a secondary battery in which electrode leads protrude in both directions, and a stack of cartridges accommodating the secondary batteries in a row.

An insulating sheet made of at least one polycarbonate material and a cooling plate made of a thermally conductive metal may be disposed below the plurality of cartridge assemblies.

According to another aspect of the present invention, a battery pack including the battery module described above may be provided.

According to another aspect of the present invention, an automobile including the battery module described above may be provided.

According to an aspect of the present invention, the rigidity of the mounting portion between the components of the battery module may be increased to improve the impact resistance of the battery module.

According to another aspect of the invention, the weight of the mounting portion of the battery module can be reduced.

According to another aspect of the present invention, the fastening member and the impact resistance of the battery module can be improved by binding the components of the battery module to one body with one fastening member.

1 is a perspective view of a battery module according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating the disassembled end plate assembly of FIG. 1. FIG.
3 is a perspective view illustrating a state in which the sensing assembly and the base plate are further disassembled in FIG. 2.
4 is a perspective view illustrating the sensing assembly of FIG. 3.
5 is a front view of the sensing board cover of FIG. 4.
6 and 7 are front and rear perspective views of the sensing board cover of FIG. 4.
8 is a perspective view illustrating an exploded state of a sensing board, a sensing board cover, and a second end plate according to an embodiment of the present invention.
9 is a perspective view of the combination of FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

In the following description of the present invention, if it is determined that detailed descriptions of related well-known configurations or functions may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a perspective view of a battery module according to an embodiment of the present invention, Figure 2 is a perspective view showing the disassembled end plate assembly in Figure 1, Figure 3 is a further disassembled state of the sensing assembly and the base plate in Figure 2 It is a perspective view showing.

Referring to these drawings, the battery module 100 according to an embodiment of the present invention, the end of the plurality of cartridge assembly 110, the sensing assembly 120, and the form that covers them from top to bottom as shown in FIG. The plate assembly 130 and the rod-shaped fastening member 140 that binds them integrally.

As will be described in detail below, the battery module 100 of the present embodiment has a plurality of cartridge assemblies 110, a sensing assembly 120, and an end plate assembly 130 being organically connected and fastened, and the mechanical strength of the fastening site is enhanced. Therefore, structural stability against external shock and vibration environments is increased.

Looking at each of the components forming the battery module 100, first, the cartridge assembly 110 may include one or more secondary batteries and the stacking frame 111.

Although not shown in detail, the secondary battery included in the cartridge assembly 110 may be a pouch type secondary battery. In this case, the pouch type secondary battery may be implemented to be stacked in one direction, for example, in the Y-axis direction while being accommodated in the stacking frame 111 as illustrated in FIGS. 2 and 3. In this case, the electrode lead L portion of the secondary battery may be exposed to the outside of the stacking frame 111 through the opening of the stacking frame 111 as shown in FIG. 3.

Of course, unlike the drawings, since the secondary batteries may be stacked in other directions such as the vertical direction, the scope of the present invention may not be limited to the shape of the drawings.

The stacking frame 111 is a means for stacking secondary batteries. The stacking frame 111 is configured to prevent the flow by holding the secondary batteries and to be stacked on each other, thereby guiding the assembly of the secondary batteries. For reference, the stacking frame 111 may be replaced with another term such as a cartridge.

On the other hand, the stacking frame 111 of the present embodiment may be manufactured in the form of a square ring with an empty central portion. In this case, four corners of the stacking frame 111 may be located at an outer circumferential portion of the secondary battery. The empty center portion of the stacking frame 111 may be covered by the cooling fins 112. The cooling fin 112 may be implemented in the form of a plate of a thermally conductive material such as aluminum. By allowing the cell body of the secondary battery to contact the cooling fins 112, heat exchange between the secondary battery and the cooling fins 112 may be achieved.

A plurality of cartridge assemblies 110 may be provided, and a plurality of cartridge assemblies 110 may be stacked on each other as illustrated in FIGS. 2 and 3. In the present embodiment, the battery module 100 includes six cartridge assemblies 110, but may include five or less or seven or more cartridge assemblies 110, depending on the design capacity.

The sensing assembly 120 transmits sensing information on electrical characteristics, such as a voltage of a secondary battery, to another device (not shown) outside the battery module 100. For example, a device such as a battery management system (BMS) may be connected to the battery module 100 to control an operation of the battery module 100 such as charging or discharging. In this case, the sensing assembly 120 may be connected to the BMS to provide the sensed voltage information of the secondary battery to the BMS, and the BMS may control the battery module 100 based on the information.

The sensing assembly 120 may be mounted to at least one side portion of the plurality of cartridge assemblies 110 to be electrically connected to the electrode lead L of the secondary battery. For example, the sensing assembly 120 may be mounted on a portion where the electrode leads L of the secondary battery are exposed. In the case of the battery module 100 of the present embodiment, a pouch type in which a positive electrode lead and a negative electrode lead protrude in both directions is provided. Since it is composed of secondary batteries, two pairs of sensing assemblies are mounted one at each side of the plurality of cartridge assemblies 110.

Here, each sensing assembly 120 is detachably coupled to corresponding side portions of the plurality of cartridge assemblies 110 and is configured to cover the entire side portions of the plurality of cartridge assemblies 110. For example, as shown in FIG. 2, the sensing assembly 120 and the plurality of cartridge assemblies 110 are coupled to each other so that the plurality of cartridge assemblies 110 may be integrally supported by the sensing assembly 120.

In addition, the sensing assembly 120 includes a through hole 123 penetrated in the vertical direction. The rod-shaped fastening member 140 may be inserted into the passage hole 123 to pass therethrough. The sensing assembly 120 may be coupled to the second end plate 132 which will be described later by the rod-shaped fastening member 140, and at least a portion of the sensing assembly 120 may be connected to the second end plate 132. At least a portion may be covered. The first end plate 131, which will be described later, may be welded or bonded to the second end plate 132.

Meanwhile, since the sensing assembly 120 is a component electrically connected to the plurality of cartridge assemblies 110, the sensing assembly 120 may withstand the external shock and vibration only when the plurality of cartridge assemblies 110 behave like a rigid body. Otherwise, the battery module 100 may be structurally and electrically damaged. Therefore, in the present embodiment, the sensing assembly 120 is designed in a direction in which dispersion and absorption of external impact and binding force with the second end plate 132 can be enhanced. For convenience of description, more detailed structural features of the sensing assembly 120 will be described later.

Referring to FIG. 3, the battery module 100 according to the present embodiment further includes an insulating sheet 160, a cooling plate 170, and a base plate 150.

The insulating sheet 160, the cooling plate 170, and the base plate 150 may be sequentially disposed below the plurality of cartridge assemblies 110.

The insulating sheet 160 may be made of a material such as polycarbonate having excellent electrical insulation and thermal conductivity. The insulating sheet 160 serves to effectively transfer heat from the cooling fins 112 to the cooling plate 170 together with the insulation of the battery module 100. The cooling plate 170 is made of a thermally conductive material such as aluminum to absorb heat from the plurality of cartridge assemblies 110.

The base plate 150 is a plate-shaped structure disposed at the bottom of the plurality of cartridge assemblies 110 to support the plurality of cartridge assemblies 110 at the bottom thereof. The base plate 150 may be configured in the form of a plate having an approximately large area, and may cover the plurality of cartridge assemblies 110.

The base plate 150 may serve to support the plurality of cartridge assemblies 110 from the bottom and protect from external impact. Therefore, the base plate 150 may be made of a metal material such as steel to ensure rigidity.

The end plate assembly 130 may be a rigid structure in the form of a cover covering the plurality of cartridge assemblies 110 and the sensing assembly 120 from top to bottom. The end plate assembly 130 includes a through hole 134 communicating with the passage hole 123 at a position corresponding to the passage hole 123 of the sensing assembly 120 up and down. Rod-shaped fastening member 140 is inserted into the through hole 134 and the through hole 123 may be assembled into the sensing assembly 120 and one body.

The end plate assembly 130 according to the present embodiment may include a first end plate 131 and a pair of second end plates 132.

2 and 3, when the sensing assembly 120 is mounted to the left and right sides, respectively, the first end plate 131 may include the top surface, the front surface, and the plurality of cartridge assemblies 110. And it may be provided in the form of surrounding the back portion integrally. The pair of second end plates 132 may be provided to surround at least a portion of the sensing assembly 120, respectively. For example, as shown in FIG. 1, the end plate assembly 130 has a partially open structure, such that the external connector C and the input / output terminal terminal T of the sensing assembly 120 may be exposed to the outside of the end plate assembly 130. Can be. In this case, the connection between the external connector C and the input / output terminal terminal T and an external device (not shown) may be easier.

The first end plate 131 and the second end plate 132 of the present embodiment may be coupled to each other by a welding method or a bonding method. To this end, as shown in FIGS. 2 and 3, the first end plate 131 and the second end plate 132 have welding portions w1 and w2 that may be welded or bonded to each other.

For example, the second end plate 132 may be assembled first to the sensing assembly 120 assembly. The second end plate 132 may be coupled to each other by the sensing assembly 120 and the rod-shaped fastening member 140.

The first end plate 131 may then be assembled to the plurality of cartridge assemblies 110. In this case, the welding portion w1 of the first end plate 131 is overlapped with the welding portion w2 of the second end plate 132. In addition, the end plate assembly 130 may be implemented by welding both the welding portions w1 and w2 of the first end plate 131 and the second end plate 132.

In this manner, since the adhesion between the first and second end plates 132 and the plurality of cartridge assemblies 110 and the sensing assembly 120 is increased, the clearance between the components may be reduced. Meanwhile, the end plate assembly 130 may be integrally formed, but in this case, the manufacturing process may be difficult, and the first and second end plates 132 may be separately manufactured in terms of assembly completion, and then the battery module 100 may be formed. Welding or bonding them during assembly may be advantageous to reduce assembly tolerances.

Figure 4 is a perspective view of the sensing assembly of Figure 3, Figure 5 is a front view of the cover for the sensing board of Figure 4, Figures 6 and 7 is a front and rear perspective view of the cover for the sensing board of Figure 4, Figure 8 is the present invention 9 is a perspective view illustrating an exploded state of a sensing board, a sensing board cover, and a second end plate, and FIG. 9 is a perspective view of FIG. 8.

Hereinafter, the structure of the above-described sensing assembly 120 will be described in more detail with reference to FIGS. 4 to 9.

As described above, in the present embodiment, the sensing assembly 120 is two and disposed at both side portions of the plurality of cartridge assemblies 110. Here, although not shown in detail, the two sensing assemblies 120 may be electrically connected to each other by a connection member such as a cable.

In addition, an external connector is provided on the sensing assembly 120 located on the left side with reference to FIG. 1, and an input / output terminal terminal is provided on the sensing assembly 120 located on the right side. Except for this matter, since the structural features of the left and right side sensing assemblies 120 are almost the same, the description of the left side sensing assembly 120 will be replaced based on the right side sensing assembly 120.

The sensing assembly 120 according to the present embodiment includes a sensing board 121 and a cover for a sensing board 122 as shown in FIGS. 4 and 8.

The sensing board 121 includes a plurality of sensing members, for example, a plurality of bus bars electrically connected to the electrode leads L of the secondary battery, a circuit board, an external connector C, an input / output terminal terminal T, and the like. It may be an assembly.

The sensing board 121 may be sized to cover all of one side portion of the plurality of cartridge assemblies 110 and may be detachably coupled to the plurality of cartridge assemblies 110. In addition, a plurality of bus bars and a circuit board may be provided on an inner surface of the sensing board 121 to be electrically connected to the electrode leads L of the secondary battery.

In addition, a bracket 121a for an input / output terminal T may be provided on an outer surface of the sensing board 121. As illustrated in FIGS. 4 and 8, the bracket 121a is provided to protrude from the outer surface of the sensing board 121 and has a bracket through-hole 121b formed in the vertical direction. In addition, a sensing board cover 122 may be mounted under the bracket. The electrode leads L of the secondary battery (see FIG. 3) are directly connected to the sensing board 121 in the lower region thereof based on the input / output terminal terminal. The sensing board cover 122 may be mounted to completely surround the outer portion of the sensing board 121 that is directly connected to the electrode lead L as described above.

The sensing board cover 122 is a plate-like structure that protects the sensing board 121 from an external impact and covers at least a portion of an outer circumference of the sensing board 121. In addition, the sensing board cover 122 protects the sensing board 121 and provides a place where the rod-shaped fastening member 140 can be inserted and supported.

The sensing board cover 122 may be made of a reinforced plastic having excellent electrical insulation and impact resistance. Of course, the sensing board cover 122 may be made of other materials having excellent insulation and impact resistance.

More specifically, in the sensing board cover 122 according to the present embodiment, referring to FIGS. 4 to 7, two through-holes 123 are formed, one at each edge portion thereof. The sensing board cover 122 may include a plurality of layered ribs 124 arranged in layers at predetermined intervals along the height direction of the two through holes 123 and between the two through holes 123. A plurality of lattice ribs 125 forming a lattice structure.

The two through holes 123 may be formed in a hollow cylindrical shape in the height direction of the sensing board cover 122.

The plurality of layered ribs 124 may be coupled to the cylindrical outer circumferential surface 126 of the through hole 123, as shown in FIGS. 5 to 7. The plurality of layered ribs 124 supports the through holes 123 to suppress deformation of the through holes 123. In addition, the plurality of lattice ribs 125 occupy the largest area in the cover 122 for the sensing board, and the horizontal ribs 125a and the vertical ribs 125b are connected to each other and are woven in a grid shape. For example, the lattice ribs 125 can distribute shocks and vibrations by distributing the load acting on one of the transverse ribs 125a to the other adjacent lattice ribs 125 by the longitudinal ribs 125b.

Accordingly, the plurality of layered ribs 124 and the lattice ribs 125 may be less weight than the solid solid structure, but more excellent in impact dispersion and mechanical stiffness. In particular, as the size of the sensing board cover 122 increases, the structure of the sensing board cover 122 may be economical by applying the layered rib 124 and the lattice rib 125 structures. have.

In addition, the plurality of layered ribs 124 and the lattice ribs 125 may be formed on both the front and rear surfaces of the sensing board cover 122. That is, in the sensing board cover 122, as shown in FIGS. 6 and 7, the wall 127 is thinly formed in a plate shape, and the layered ribs 124 and the lattice ribs are formed at the front and rear surfaces of the wall 127. 125 has a protruding structure. In addition, a rear surface of the sensing board cover 122 may further include a socket for mounting a temperature sensor. The temperature measuring sensor (not shown) may be configured to be mounted to the temperature measuring sensor mounting sensor and may be inserted up to the inside of the battery module 100. When the temperature is measured by the temperature measuring sensor, the measured temperature information may be transferred to the BMS outside the battery module 100 and used to control the battery module 100.

Next, referring to FIGS. 8 to 9, the coupling configuration of the sensing assembly 120 and the second end plate 132 will be described.

The sensing board cover 122 may be mounted on the sensing board 121 in a downward direction. At this time, the upper surface of the sensing board cover 122 may be fitted to the lower end of the bracket of the sensing board 121, the passage hole 123 and the bracket through-hole 121b may be placed in communication with each other.

As shown in FIG. 8, the second end plate 132 has a fastening flange 133. And the through hole 134 is formed in the fastening flange 133. The second end plate 132 may be mounted to the sensing assembly 120 in a downward direction so that a portion of the fastening flange 133 spans the upper end of the bracket 121a of the sensing board. In this case, the center of the through hole 134 of the fastening flange 133 and the through hole 123 of the sensing assembly 120 are positioned on the coaxial line.

On the other hand, the rod-shaped fastening member 140 may include a bushing 141 and the long bolt 142. The bushing 141 may be provided in a hollow pipe type metal material and may be inserted into and inserted into the through hole 123 of the sensing assembly. In this way, by interposing the bushing 141 of the metal material in the through-hole 123, it is possible to prevent the play when the long bolt 142 is fastened later, and also to increase the allowable tensile strength, that is, tightening strength of the long bolt plastic material It is possible to prevent the breakage of the sensing board cover 122 and to strengthen the mechanical strength of the mounting portion.

The long bolt 142 is provided so that the body can be inserted into the bushing 141 to pass through, the end portion thereof may be configured to be coupled to the nut at the bottom of the passage hole 123. The long bolt 142 has a larger head portion than the through hole 134 of the fastening flange 133 and presses the fastening flange 133 so that one body of the sensing assembly 120 and the second end plate 132 is provided. Can be bound.

As described above, according to the configuration of the present invention, a portion of the sensing board 121 vulnerable to shock and vibration may be firmly protected by the sensing board cover 122 and the second end plate 132. In other words, the sensing board cover 122 includes a plurality of layered ribs 124 and lattice ribs 125 to disperse the impact, and a portion of the through hole 123 to which the long bolt 142 is fastened. Can be firmly supported.

In addition, a metal bushing 141 is further interposed in the through hole 123, and then the sensing assembly 120 and the second end plate 132 are integrally bound by the long bolt 142 and the second end. Since the plate and the first end plate are integrally welded, the components constituting the battery module are organically bound and behave as one rigid body, thereby increasing impact resistance of the battery module 100.

The battery pack according to the present invention may include one or more battery modules according to the present invention. In addition, the battery pack according to the present invention, in addition to such a battery module, a case for accommodating the battery module, various devices for controlling the charge and discharge of the battery module, such as BMS (Battery Management System), current sensors, fuses, etc. It may be further included.

The battery module according to the present invention can be applied to an automobile such as an electric vehicle or a hybrid vehicle. That is, the vehicle according to the present invention may include a battery module according to the present invention.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Meanwhile, when terms indicating directions such as up, down, left, right, before, and after are used in the present specification, these terms are merely for convenience of description, and according to the position of the object or the position of the observer, etc. It will be apparent to those skilled in the art that these may vary.

100: battery module 110: cartridge assembly
111: lamination frame 112: cooling fin
120: sensing assembly 121: sensing board
122: cover for sensing board 123: through hole
124: layered rib 125: lattice rib
126: cylindrical outer peripheral surface 130: end plate assembly
131: first end plate 132: second end plate
133: fastening flange 134: through hole
140: rod fastening member 141: bushing
142: long bolt 150: base plate
160: insulating sheet 170: cooling plate
L: electrode lead

Claims (14)

  1. A plurality of cartridge assemblies including a secondary battery and a stacking frame for accommodating the secondary batteries, and stacked in one direction;
    A sensing board mounted on at least one side surface of the plurality of cartridge assemblies and having a connection member electrically connected to the electrode leads of the secondary battery, and a cover for a sensing board mounted outside the sensing board to protect the sensing board; And a sensing assembly having two through-holes formed at both edges of the cover for the sensing board in a vertical direction. And
    Is formed of a rigid material, the plurality of cartridge assembly and the sensing assembly is configured to cover from top to bottom, and provided with a through hole communicating with the through hole of the sensing assembly, the rod-type fastening to the through hole and the through hole An end plate assembly fitted with a member and assembled into the body with the sensing assembly,
    The sensing board cover may include a plurality of layered ribs arranged in layers at predetermined intervals along the height direction of the through hole.
  2. delete
  3. delete
  4. The method of claim 1,
    The sensing board cover further includes a plurality of lattice ribs forming a lattice structure between the two through holes.
  5. The method of claim 4, wherein
    At least one of the layered rib and the lattice rib is a battery module, characterized in that formed on both the front and rear of the sensing board cover.
  6. The method of claim 1,
    The sensing assembly is mounted to the left side and the right side of the plurality of cartridge assemblies,
    The end plate assembly is
    A battery comprising: a first end plate formed to surround the plurality of cartridge assemblies integrally with a top portion, a front portion, and a rear portion; and a pair of second end plates formed to surround the sensing assembly. module.
  7. The method of claim 6,
    The second end plate has a fastening flange positioned above the through hole of the sensing assembly, wherein the through hole is formed in the fastening flange, characterized in that the battery module.
  8. The method of claim 6,
    And the first end plate and the second end plate have welding portions welded or bonded to each other.
  9. The method of claim 1,
    The rod-shaped fastening member,
    The hollow battery type battery module, characterized in that it comprises a metal bushing inserted into the through hole, and a long bolt through the bushing to assemble the end plate assembly and the sensing assembly into a single body.
  10. The method of claim 1,
    The sensing assembly is a battery module, characterized in that detachably coupled to cover the entire one side portion of the plurality of cartridge assemblies.
  11. The method of claim 1,
    The plurality of cartridge assemblies, the battery module, characterized in that the electrode leads protruding in both directions, and the cartridges for accommodating the secondary battery arranged in a row in a stacked form.
  12. The method of claim 1,
    Battery module, characterized in that the insulating sheet provided with at least one polycarbonate material and a cooling plate made of a thermally conductive metal material disposed below the plurality of cartridge assemblies.
  13. A battery pack comprising the battery module according to any one of claims 1 and 4 to 12.
  14. An automobile comprising the battery module according to any one of claims 1 to 4.
KR1020150155938A 2015-11-06 2015-11-06 Battery Module improved impact resistance KR102032504B1 (en)

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KR102041538B1 (en) * 2017-11-10 2019-11-06 에스앤지 주식회사 Caps of the battery case for a electric car
KR102106448B1 (en) * 2017-12-11 2020-05-04 삼성에스디아이 주식회사 Battery pack
CN110271402B (en) * 2019-01-09 2020-08-07 比亚迪股份有限公司 Power battery pack, energy storage device and electric vehicle
KR20200104143A (en) * 2019-02-26 2020-09-03 주식회사 엘지화학 Battery module

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US20120028094A1 (en) * 2010-07-27 2012-02-02 Yongsam Kim Battery pack
WO2012070782A2 (en) * 2010-11-22 2012-05-31 주식회사 엘지화학 Battery pack having a compact structure
KR101440402B1 (en) * 2011-06-29 2014-09-15 주식회사 엘지화학 Battery Module Having Coupling Hole for Sensing Assembly and Fixing Hole for Unit Cell Assembly
KR101642325B1 (en) * 2013-10-17 2016-07-25 주식회사 엘지화학 Battery module and battery pack including the same
KR20150050314A (en) * 2013-10-31 2015-05-08 타이코에이엠피(유) A sensing block and a battery package comprising thereof
KR101743696B1 (en) * 2013-11-29 2017-06-05 주식회사 엘지화학 Battery module and battery pack including the same
KR101667519B1 (en) * 2013-12-17 2016-10-28 주식회사 엘지화학 Battery Module having Bus Bar employed with External Input-Output Terminal

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