WO2019098491A1 - 배터리 셀 가압형 엔드 플레이트와 확장형 센싱 하우징 구조가 적용된 배터리 모듈 - Google Patents
배터리 셀 가압형 엔드 플레이트와 확장형 센싱 하우징 구조가 적용된 배터리 모듈 Download PDFInfo
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- WO2019098491A1 WO2019098491A1 PCT/KR2018/008290 KR2018008290W WO2019098491A1 WO 2019098491 A1 WO2019098491 A1 WO 2019098491A1 KR 2018008290 W KR2018008290 W KR 2018008290W WO 2019098491 A1 WO2019098491 A1 WO 2019098491A1
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- Prior art keywords
- pair
- sensing
- sensing housing
- battery module
- side plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/364—Battery terminal connectors with integrated measuring arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery module, more particularly, to an end plate capable of pressing and packaging battery cells inside a module, and a battery module to which a sensing housing structure having expandability is applied according to the number of battery cells .
- This application is a priority claim of Korean Patent Application No. 10-2017-0151589 filed on November 14, 2017, the disclosure of which is incorporated herein by reference in its entirety.
- Types of secondary batteries widely used today include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, and nickel-zinc batteries.
- the operating voltage of such a unitary secondary battery cell that is, the unit battery cell is about 2.5V to 4.6V. Therefore, when a higher output voltage is required, a plurality of battery cells may be connected in series to form a battery pack. In addition, a plurality of battery cells may be connected in parallel according to a charge / discharge capacity required for the battery pack to form a battery pack. Therefore, the number of battery cells included in the battery pack can be variously set according to the required output voltage or the charge / discharge capacity.
- An end plate for fixing a cell assembly and a cell assembly which are an assembly of a plurality of secondary battery cells, and protecting the battery assembly from an external impact when a plurality of secondary battery cells are connected in series /
- a battery module including a sensing housing for electrical connection of the battery pack is first constructed and a battery pack is constructed by adding other components using the at least one battery module.
- the secondary battery cells constituting the battery module or the battery pack can be generally provided as a pouch-type secondary battery having an advantage that they can be easily stacked.
- the external shape of the battery module may change due to the pressure due to the volume expansion. Changes in the external shape may affect the safety of the battery module itself and the stability of other adjacent devices, so that swelling phenomenon should be avoided.
- a strap is wound around an end plate to urge the battery module.
- only the portion wrapped with the strap is mainly pressed and the other portions are relatively uncomfortable.
- the sensing assembly generally has a single housing structure and covers the protruded portion of the electrode leads of the secondary battery cells.
- the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an end plate which can protect battery cells located in a battery module from the outside and press with a uniform pressure, and a sensing assembly having a simple and easy expandability And a battery module.
- the pair of side plates may have a bead portion recessed by a predetermined depth, and the pair of buffer pads may have one surface shaped to the bead portion.
- the bead portion has a first bead portion provided in a middle region of the side plate and a second bead portion separated from the first bead portion in the left and right side regions of the side plate with respect to the first bead portion, And a second bead portion having a distribution area and a depth.
- top and the bottom plates each include a horizontal portion forming a horizontal plane and a vertical portion bent vertically at both ends of the horizontal portion, wherein the pair of side plates have edge regions at the top and bottom, respectively, And can be press-fitted to the vertical portion of the trough plate.
- the pair of side plates may have press-fit protrusions protruding from edge regions of the upper and lower ends, and the top and the bottom plates may have press-fit holes that are tightly coupled with the press-fit protrusions in the vertical portion.
- the upper and lower edge regions of the pair of side plates may be superimposed inside the vertical portion of the top and the trough plate.
- a sensing assembly electrically connected to the electrode leads protruding from the pouch-shaped battery cells, the sensing assembly being disposed on at least one of a front surface and a rear surface of the cell assembly, wherein the sensing assembly is electrically connected to the electrode leads Bus bars; And a sensing housing including a plurality of sensing housing parts mounted on the front surface of the bus bar, passing the electrode leads to the bus bar side, and mutually detachable and assembled continuously in one direction.
- the plurality of sensing housing parts may be provided corresponding to the number of the pouch type battery cells.
- the plurality of sensing housing parts may be assembled by interlocking with each other with corresponding embossed projections and depressed grooves.
- the sensing housing may be fitted to one end of each of the pair of side plates and be supported by the pair of side plates so as to be separated from the plurality of pouch-shaped battery cells by a predetermined distance.
- the bus bar includes a bonding portion provided in a plate form to be connected to the electrode leads and a terminal bending portion bent in a U shape at one end of the bonding portion, And a slot formed through the assembly of the housing part and the other sensing housing part and defining a slit for passing at least a portion of the bus bar and an inner space for receiving the end bending part.
- the sensing assembly may further include a voltage sensing receptacle terminal that is inserted into the slot and is electrically connected to the end bending portion of the bus bar.
- the sensing assembly may further include an external power connection member having a nut accommodated in one of the slots provided in the sensing housing and fixed with a bolt fastened to the nut.
- top and the trough plate each have a horizontal portion forming a horizontal plane, a vertical portion bent vertically at both ends of the horizontal portion, and an insertion portion bent toward the cell assembly at an end of the vertical portion
- the plate may be provided with a plate hole through which the fitting portion can be inserted into the edge regions of the upper and lower ends, respectively.
- the battery module according to the present invention may be applied to a battery pack or a power storage device including at least one battery module.
- a battery module having an end plate that is excellent in assembling convenience and can pressurize battery cells with a uniform pressure.
- a battery module having a sensing assembly having a simple and easy expandability.
- the sensing assembly not only has extensibility but also has the advantage that it is easy to assemble and connect with parts including the bus bars.
- FIG. 1 is a perspective view illustrating a schematic configuration of a battery module according to an embodiment of the present invention.
- Figures 2 and 3 are partial exploded perspective views of Figure 1.
- FIG. 4 is a partial enlarged view of Fig.
- FIG. 5 is a perspective view of a longitudinally incised battery module.
- FIG. 6 is a partial perspective view of a laterally cut-away battery module.
- FIG. 7 is a perspective view of sensing housing parts according to an embodiment of the present invention.
- Figure 8 is a partially exploded perspective view of the sensing housing of Figure 7;
- 9 and 10 are a right side view and a front view of the sensing housing part, respectively.
- FIG. 11 is a view for explaining a process of assembling the sensing housing parts and the bus bar according to an embodiment of the present invention.
- FIG 12 and 13 are views showing the state before and after coupling of the receptacle terminal for voltage sensing to the sensing assembly according to the embodiment of the present invention.
- FIG. 14 and 15 are views for explaining a process of assembling the sensing housing parts and the external power connection member according to an embodiment of the present invention.
- FIG. 16 is a partially-exploded perspective view of a battery module according to another embodiment of the present invention, corresponding to FIG. 2; FIG.
- 17 is a longitudinal sectional view of a battery module according to another embodiment of the present invention.
- FIG. 1 is a perspective view showing a schematic structure of a battery module according to an embodiment of the present invention
- FIGS. 2 and 3 are partial exploded perspective views of FIG. 1
- FIG. 4 is a partial enlarged view of FIG. Is a perspective view of the battery module cut in the longitudinal direction.
- a battery module 10 includes a cell assembly 100, a pair of buffer pads 200, a top and a bottom gap plate 300 and 400, and a pair of side plates 500).
- the cell assembly 100 constituting the battery module 10 may be an aggregate of a plurality of pouch-shaped battery cells 110.
- the pouch-shaped battery cells 110 may be stacked in a horizontal direction with their large surfaces perpendicular to the ground.
- the cell assembly 100 is constructed using seven pouch-type battery cells 110, but the cell assembly 100 is variable depending on the output / capacity required of the unit battery module 10, May be configured using less than seven or eight or more pouch-like battery cells (110).
- the pouch-type battery cell 110 may be composed of a pouch outer case, an electrode assembly accommodated in the pouch outer case, and an electrolyte.
- the pouch-type sheathing material may be composed of two pouches, and at least one of them may be formed with a concave inner space.
- the electrode assembly can be housed in the inner space of the pouch.
- the two pouch peripheries are welded to each other, so that the inner space in which the electrode assembly is accommodated can be sealed.
- the electrode lead 111 can be attached to the electrode assembly and the electrode lead 111 is interposed between the fused portions of the pouch case member and exposed to the outside of the pouch case member to function as an electrode terminal of the battery cell 110 have.
- a pair of buffer pads 200 may be disposed on both side surfaces of the cell assembly 100.
- the buffer pad 200 may be formed of an elastic material and an insulating material that absorbs expansion pressure and external impact when swelling the pouch type battery cells 110 due to charging / discharging.
- the buffer pad 200 may be made of foamed polypropylene (EPP) or ethylene-vinyl acetate copolymer (EVA) in the form of a foam having a size facing the wide surface of the pouch-shaped battery cell 110.
- the buffer pad 200 faces the pouch-type battery cell 110 whose one side is disposed at the outermost side in the cell assembly 100, and the other side faces the side plate 500 And is interposed between the cell assembly 100 and the side plate 500 facing each other.
- the buffer pads 200 are disposed only at the outermost side of the cell assembly 100, so that when the buffer pads 200 are interposed between the battery cells 110 The energy density per unit area of the battery module 10 can be higher.
- the cell assembly 100 of the present invention may have a structure in which there is no gap between the battery cell 110 and the battery cell 110, or the battery cells 110 are space-concentrated with only a double-sided tape .
- the compressive stress level of the pouch-type battery cell 110 positioned at the outermost position is the highest. Therefore, by pressing the cushion pad 200 on the interface between the expansion force of the pouch type battery cells 110 and the pressing force of the side plate 500, the pressing force of the side plate 500 and the pressing force of the pouch type battery cell 110 So that damage to the side plate 500 and the battery cells 110 can be prevented.
- the stress level acting on the battery cell 110 or the side plate 500 is increased as the compression pad 200 is thicker and the compression force of the side plate 500 or the expansion force of the battery cells 110 is effectively dispersed. But an excessively thick buffer pad 200 is undesirable in terms of the energy density of the battery module 10. Therefore, the buffer pad 200 according to the present invention can be calculated in thickness by the following equation.
- T thickness of the cushioning pad 200
- A number of battery cells 110 x maximum displacement amount of the battery cell 110 during swelling
- B thickness of the cushion pad 200 at maximum compression
- the cushioning pads 200 of the present invention are arranged in pairs on two side surfaces of the cell assembly 100, so that the cushioning pads 200 can absorb the deformation amount during swelling of all the battery cells 110, have. Therefore, by setting the variable A / 2 in the equation for calculating the thickness of the cushioning pad 200 to the maximum amount of strain by which the cushioning pad 200 can be compressed, the two cushioning pads 200 can maximize the swelling of all the battery cells 110 So that it can be absorbed by each half of the deformation amount.
- the present invention can increase the energy density by constructing the cushioning pad 200 with a minimum thickness within a range that exhibits an effective effect.
- the top and bottom plates 300 and 400 and the pair of side plates 500 may be in the form of a plate having a predetermined area and may be disposed on the top / bottom and both side portions of the cell assembly 100, The upper surface, the lower surface, the left surface portion, and the right side surface portion of the housing.
- These top and trough plates 300 and 400 and the pair of side plates 500 can be understood as an end plate, which covers the outer periphery of the cell assembly 100.
- top and trough plates 300 and 400 and the pair of side plates 500 provide a mechanical support force for the cell assembly 100 and may protect the cell assembly 100 from an external impact. Therefore, it is preferable that the top and trough plates 300 and 400 and the pair of side plates 500 are made of a metal such as steel so that rigidity can be secured.
- the pair of side plates 500 is configured to be assembled with the cell assembly 100 and the buffer pad 200 with the tower and the gap plates 300 and 400 being centered.
- the top and trough plates 300 and 400 and the pair of side plates 500 may be assembled together to form respective tubes.
- the pair of side plates 500 may be press-fitted to both ends of the top and the trough plates 300 and 400 with the buffer pads and the cell assembly therebetween.
- the top and the trough plates 300 and 400 have horizontal parts 310 and 410 forming a horizontal plane and vertical parts 310 and 410 at both ends of the horizontal part 310 and 410, respectively. And may include vertical portions 320 and 420 that are bent.
- the pair of side plates 500 are provided with upper and lower edge regions 520 and 530 which are connected to the vertical portions 320 and 420 of the top and the trough plates 300 and 400 by press fitting or clinching, .
- the upper and lower edge regions 520 and 530 of the side plate 500 are provided with press-fit protrusions 521 and 531 protruding outward, and the vertical portions 320 and 420 of the top and the trough plates 300 and 400 are provided with the press- 521, and 531 and the press-fit holes 321 and 421 are tightly coupled.
- the press-fit holes 321 and 421 are press-fitted into the press-fit protrusions 521 and 531 in a state where the upper and lower edge regions 520 and 530 of the side plate 500 are superimposed on the inside of the vertical portions 320 and 420 of the top and trough plates 300 and 400
- the side plates 500 can be fixed to the top and the trough plates 300 and 400.
- two lower edge regions 530 of the left and right side plates 500 are integrally press-fitted into the gap portions between the vertical portions 320 and 420,
- Two edge regions 520 are integrally press-fitted between the vertical portions 320 and 420 of the top plate 300.
- the interval between the vertical portions 320 and 420 of the top and the trough plates 300 and 400 corresponds to the width of the lateral side of the cell assembly 100. Therefore, when the top and trough plates 300 and 400 and the left and right side plates 500 are press-fitted together as described above, the left and right side plates 500 are positioned inside the vertical portions 320 and 420 of the top and the trough plates 300 and 400 The buffer pads 200 and the battery cells 110 can be pressed by the left and right side plates 500. [ At this time, the pressing force applied by the side plate 500 can be uniformly transmitted to the cell assembly 100 through the buffer pad 200.
- the pair of side plates 500 may have a bead portion recessed by a predetermined depth from the plate surface, and the pair of buffer pads 200 may have a surface facing the bead portion.
- the bead portion may take a negative shape when viewed from the side of the side plate 500.
- the bead portion may prevent the side plate 500 from being bent or twisted by imparting the mechanical rigidity to the side plate 500 with respect to the expansion force when swelling the battery cells 110.
- the bead portion includes a first bead portion 511 provided in the center region of the side plate 500, and a second bead portion 511 separately provided on the left and right sides with respect to the first bead portion 511, (512).
- the first bead 511 may be widely distributed in the center region of the side plate 500. That is, the first bead portion 511 may be formed in a middle region corresponding to the middle third portion of the side plate 500 when the side plate 500 is divided into five equal parts along the longitudinal direction of the battery module 10.
- the first bead 511 corresponds to a portion of the battery cell 110 where the amount of deformation during swelling is the largest.
- the second bead portion 512 may be separately formed symmetrically on the right and left sides of the first bead portion 511.
- the second bead portion 512 may have a smaller distribution area and depth than the first bead portion 511.
- the first bead portion 511 facing the central portion of the battery cell 110 that swells most when the battery cell 110 is swelled may have a wider distribution area and a deeper distribution than the second bead portion 512.
- the side plate 500 can more effectively stop the expansion of the battery cells 110 due to a stronger pressing force at the center portion of the battery cells 110 when swelling the battery cells 110.
- the battery module 10 may further include a sensing assembly 600 electrically connected to the pouch-type battery cells 110 disposed on at least one of a front surface and a rear surface of the cell assembly 100 .
- the pouch type battery cell 110 may be divided into a unidirectional cell and a bidirectional cell according to the protruding direction of the electrode lead 111.
- the sensing assembly 600 is configured to be mounted on the front and rear portions of the cell assembly 100. That is, unlike the present embodiment, when the battery module 10 is constructed of the unidirectional pouch type battery cell 110, the sensing assembly 600 may be installed only at one of the front and rear portions of the cell assembly 100 .
- FIG. 6 is a partial perspective view of a laterally cut-away battery module
- FIG. 7 is a perspective view of sensing housing parts according to an embodiment of the present invention
- FIG. 8 is a partially exploded perspective view of the sensing housing of FIG. 11 is a view for explaining a process of assembling the sensing housing parts and the bus bar according to the embodiment of the present invention.
- the sensing assembly 600 may include a plurality of bus bars 610 and a sensing housing 620 in a configuration for electrical connection and voltage sensing of a plurality of battery cells 110.
- the bus bar 610 may be coupled to the electrode leads 111 through a welding connection so as to be electrically connected to the electrode leads 111 of the plurality of battery cells 110.
- the sensing housing 620 provides a place for mounting various components including the bus bar 610 and covers the front and rear portions of the cell assembly 100.
- the bus bar 610 is mounted on the front surface of the sensing housing 620 and the electrode leads 111 of the battery cells 110 can be welded to the bus bar 610 through the body of the sensing housing 620 have.
- the sensing housing 620 is fitted to one end 540 of each of the pair of side plates 500 and spaced apart from the plurality of pouch-shaped battery cells 110 by a predetermined distance And can be supported by the pair of side plates 500. Accordingly, a predetermined empty space G may be formed between the sensing housing 620 and the plurality of pouch-shaped battery cells 110.
- the empty space G may be utilized as a gas trapping space that can occur when the pouch type battery cells 110 swell.
- the pressure may greatly increase and the risk of explosion may be increased.
- the gas trapping space is provided as in the present embodiment, an abrupt pressure increase of the battery module 10 can be prevented.
- the sensing housing 620 of the present invention may be composed of unit sensing housing parts 620a which are detachable from each other and can be assembled continuously in one direction.
- the unit sensing housing parts 620a are provided in a number corresponding to the number of the pouch type battery cells 110 and are fitted in a block form with the embossing projections 621 and the engraved grooves 622 corresponding to each other Can be assembled.
- the unit sensing housing part 620a may be provided with the relief protrusions 621 on the left side, and the depression 622 may be provided on the right side opposite thereto .
- the relief protrusions 621 fit into the depressed grooves 622
- the left side surface of one of the unit sensing housings 620 and the right side surface of the other sensing housing part 620a may be assembled while being in contact with each other.
- another sensing housing part 620a may be further assembled to the already assembled sensing housing parts 620a to form a single sensing housing 620.
- the sensing housing 620 can be realized by merely adjusting the number of the sensing housing parts 620a so as to correspond to the number of the sensing housing parts 620a. That is, the sensing housing 620 according to the present invention can easily and easily be expanded by assembling the unit sensing housing parts 620a.
- the bus bar 610 includes a plate-shaped joint portion 611 to which the electrode leads 111 are joined, And may include a distal bending portion 612 that takes a bended shape.
- the sensing housing 620 includes slits 623 formed by assembling one sensing housing part 620a and another sensing housing part 620a and passing a part of the bus bar 610, May further include slots (624) forming an interior space for receiving the distal bending portion (612) of the bus bar (610).
- the unit sensing housing part 620a includes a first cutout part 623a partially cut by the thickness of the bus bar 610 on the left and right sides thereof, And a second cut-out portion 624a which is partially cut away by a size corresponding to the width of the distal bending portion 612 at a position adjacent to the distal end bending portion 623a.
- the slits 623 and the slots 624 of the sensing housing 620 are formed such that two first cut portions 623a and second cut portions 624a which are mutually opposite to each other when the unit sensing housing parts 620a are assembled, .
- the bus bar 610 is mounted on the right side of one of the sensing housing parts 620a in the lateral direction.
- a portion of the bus bar 610 which is bent and extended at the joint portion 611, can be laterally inserted into the first cutout portion 623a, and the end bent portion 612 is also partially cut into the second cutout portion 624a in the lateral direction.
- the left side of the other sensing housing part 620a is assembled to the right side of one of the sensing housing parts 620a.
- the bent portion of the bonding portion 611 and the remaining portion of the end bending portion 612 are respectively connected to the first cutout portion 623a and the second cutout portion 624a of the other sensing housing part 620a Respectively.
- the bus bar 610 is confined between the sensing housing parts 620a and the joint part 611 of the bus bar 610 is exposed to the front part of the sensing housing 620, (624).
- the end bending portion 612 accommodated in the inner space of the slot 624 may be electrically connected to the voltage sensing receptacle terminal 630 as shown in FIGS.
- the voltage sensing receptacle terminal 630 is inserted into and released from the slot 624 and connected to the BMS board to serve as a connector for transmitting the voltage information of the battery cells 110 to the BMS.
- the voltage sensing receptacle terminal 630 is inserted into the slot 624 of the sensing housing 620 and is electrically connected to the distal bending portion 612 of the bus bar 610 to sense the voltage of the battery cells 110, And transmits the information to the BMS.
- a nut 641 is accommodated in one of the slots 624 provided in the sensing housing 620, and a bolt (not shown) And an external power connection member 640 that is fixed to the external power source.
- the external power connection member 640 may be provided in the form of a metal plate such as the bus bar 610 and may be formed by electrically connecting the battery module 10 of the present invention to another battery module 10, And may be used for connecting to an electrode terminal.
- the external power connecting member 640 may be mounted on the sensing housing 620a by a bolt / nut 641 fastening method to the sensing housing part 620a located at the end of the sensing housing 620.
- the assembly structure of the external power connection member 640 may be further extended so that the nut 641 is inserted into the second cutout portion 624a of one of the sensing housing parts 620a as in the assembly method of the bus bar 610, The other sensing housing 620 is assembled and the remaining part of the nut 641 is fitted into the second cutout 624a of the other sensing housing 620, The nut 641 is constrained to the two sensing housing parts 620a.
- the bolt may be fitted to the external power connecting member 640 and fastened to the nut 641 to fix the external power connecting member 640 to the sensing housing 620.
- FIG. 16 is a partially sectional perspective view of a battery module according to another embodiment of the present invention
- FIG. 17 is a longitudinal sectional view of a battery module according to another embodiment of the present invention.
- a pair of side plates 500 ' is configured to be fitted to both ends of the top and trough plates 300' and 400 '.
- the top and trough plates 300 'and 400' include a horizontal portion 310 'forming a horizontal plane and a vertical portion 320' bent perpendicularly at both ends of the horizontal portion 310 ' And a fitting portion 321 'bent toward the battery cells 110 at an end of the vertical portion 320'.
- the pair of side plates 500 ' are provided with plate holes 521' and 531 'through which the fitting portion 321' can be inserted into the upper and lower edge regions 520 'and 530', respectively. . ≪ / RTI >
- the upper edge region 520 'of the top plate 300' and the pair of side plates 500 ' is located at both ends of the top plate 300', that is,
- the trough plate 400 ' may be coupled to the lower edge region 530' of the pair of side plates 400 '.
- the battery module according to the present embodiment has a pair of side plates 500 'coupled between both ends of the top and the trough plate 300'400' so that the battery cells 110 are connected to the side plates 400 'so that swelling can be prevented.
- the fastening force is stronger than the above embodiment.
- the swelling force of the battery cells 110 during swelling is force majeure, the above-described embodiment is likely to release the press-fitting, but in the present embodiment, there is little possibility that the fitting structure will be released unless the coupling portion is damaged.
- the battery pack according to the present invention may include at least one battery module 10 according to the present invention.
- the battery pack according to the present invention may include a pack case for accommodating the battery module 10, various devices for controlling the charging and discharging of the battery module 10, such as BMS, Sensors, fuses, and the like.
- the battery module 10 according to the present invention can be applied to an automobile or a power storage device (ESS) such as an electric car or a hybrid car.
- ESS power storage device
Abstract
Description
Claims (15)
- 넓은 면이 세워져 일 방향으로 적층 배열되는 복수 개의 파우치형 배터리 셀들로 구성된 셀 어셈블리를 구비한 배터리 모듈로서,상기 셀 어셈블리의 양쪽 측면부에 배치되는 한 쌍의 완충패드;상기 셀 어셈블리의 상부와 하부를 각각 커버하는 탑 및 바틈 플레이트; 및상기 한 쌍의 완충패드와 상기 셀 어셈블리를 사이에 두고, 상기 탑 및 바틈 플레이트의 양단부에 압입 또는 끼워 맞춤 결합되는 한 쌍의 사이드 플레이트를 포함하는 것을 특징으로 하는 배터리 모듈.
- 제1항에 있어서,상기 한 쌍의 사이드 플레이트는 미리 결정된 깊이만큼 함몰 형성된 비드부를 구비하며, 상기 한 쌍의 완충패드는 상기 비드부에 형상 맞춤된 일면을 갖는 것을 특징으로 하는 배터리 모듈.
- 제2항에 있어서,상기 비드부는 상기 사이드 플레이트의 가운데 영역에 마련되는 제1 비드부와 상기 제1 비드부를 기준으로 상기 사이드 플레이트의 좌/우측 사이드 영역에 상기 제1 비드부와 분리되어 위치하고 상기 제1 비드부보다 작은 분포 면적과 깊이로 마련되는 제2 비드부를 포함하는 것을 특징으로 하는 배터리 모듈.
- 제1항에 있어서,상기 탑 및 바틈 플레이트는, 각각수평면을 형성하는 수평부와, 상기 수평부의 양쪽 끝단에서 수직하게 절곡되는 수직부를 포함하고,상기 한 쌍의 사이드 플레이트는, 각각상단과 하단의 에지 영역이 상기 탑 및 바틈 플레이트의 수직부와 압입 결합되는 것을 특징으로 하는 배터리 모듈.
- 제4항에 있어서,상기 한 쌍의 사이드 플레이트는 상기 상단과 하단의 에지 영역에 돌출 형성된 압입 돌기들을 구비하고, 상기 탑 및 바틈 플레이트는 상기 수직부에 상기 압입 돌기와 억지 끼움 결합되는 압입 홀들을 구비하는 것을 특징으로 하는 배터리 모듈.
- 제4항에 있어서,상기 한 쌍의 사이드 플레이트의 상단과 하단 에지 영역은 상기 탑 및 바틈 플레이트의 수직부 안쪽에 중첩 배치되는 것을 특징으로 하는 배터리 모듈.
- 제1항에 있어서,상기 셀 어셈블리의 전면부 및 후면부 중 적어도 일측에 배치되며, 상기 파우치형 배터리 셀들에서 돌출되는 전극 리드들을 전기적으로 연결하는 센싱 어셈블리를 더 포함하며,상기 센싱 어셈블리는,상기 전극 리드들과 전기적으로 연결되는 버스바; 및상기 버스바가 전면에 장착되고, 상기 전극 리드들을 상기 버스바 측으로 통과시키며, 상호 탈착 가능하며 일 방향으로 연속적으로 조립되는 복수 개의 센싱 하우징 파트들로 구성된 센싱 하우징을 포함하는 것을 특징으로 하는 배터리 모듈.
- 제7항에 있어서,상기 복수 개의 센싱 하우징 파트들은,상기 파우치형 배터리 셀들의 개수에 대응되게 구비되는 것을 특징으로 하는 배터리 모듈.
- 제7항에 있어서,상기 복수 개의 센싱 하우징 파트들은,상호 대응되는 양각 돌기 및 음각 홈을 구비하여 상호 블록 결합 형태로 끼워 맞춰져 조립되는 것을 특징으로 하는 배터리 모듈.
- 제7항에 있어서,상기 센싱 하우징은 상기 한 쌍의 사이드 플레이트 각각의 일측 끝단에 끼워 맞춤되어 상기 복수 개의 파우치형 배터리 셀들로부터 소정 간격 이격되게 상기 한 쌍의 사이드 플레이트에 의해 지지되는 것을 특징으로 하는 배터리 모듈.
- 제7항에 있어서,상기 버스바는, 상기 전극 리드들와 접합되는 플레이트 형태로 마련되는 접합부와, 상기 접합부의 일단에서 "U"자 형상으로 벤딩된 형태를 취하는 말단 벤딩부를 구비하며,상기 센싱 하우징은,어느 하나의 센싱 하우징 파트와 다른 하나의 센싱 하우징 파트의 조립으로 형성되며, 상기 버스바의 적어도 일부분을 통과시키는 슬릿과, 상기 말단 벤딩부를 수용하기 위한 내부 공간을 형성하는 슬롯을 포함하는 것을 특징으로 하는 배터리 모듈.
- 제11항에 있어서,상기 센싱 어셈블리는,상기 슬롯에 끼워져 상기 버스바의 말단 벤딩부와 전기적으로 연결 가능하게 마련되는 전압 센싱용 리셉터클 단자를 더 포함하는 것을 특징으로 하는 배터리 모듈.
- 제11항에 있어서,상기 센싱 어셈블리는,상기 센싱 하우징에 구비된 상기 슬롯들 중 어느 하나에는 너트가 수용되고, 상기 너트에 체결되는 볼트로 고정되는 외부 파워 연결용 부재를 더 포함하는 것을 특징으로 하는 배터리 모듈.
- 제1항에 있어서,상기 탑 및 바틈 플레이트는, 각각수평면을 형성하는 수평부, 상기 수평부의 양쪽 끝단에서 수직하게 절곡되는 수직부 및 상기 수직부의 끝단에 상기 셀 어셈블리를 향해 절곡되는 끼움부를 포함하며,상기 한 쌍의 사이드 플레이트는, 각각상단과 하단의 에지 영역에 상기 끼움부가 끼워 넣어질 수 있는 플레이트 홀이 마련되는 것을 특징으로 하는 배터리 모듈.
- 제1항에 있어서,상기 완충패드는 두께가 다음의 수식,T = A/2 + B(T : 완충패드 두께, A : 배터리 셀 개수 × 배터리 셀의 스웰링 시 최대 변위량, B : 완충 패드의 최대 압축시 두께)에 의해 산정되는 것을 특징으로 하는 배터리 모듈.
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US16/611,403 US11764435B2 (en) | 2017-11-14 | 2018-07-23 | Battery module to which battery cell pressing-type end plate and expandable sensing housing structure are applied |
PL18879466.3T PL3651231T3 (pl) | 2017-11-14 | 2018-07-23 | Moduł akumulatorowy, w którym zastosowano płytkę końcową typu dociskowego ogniwa akumulatorowego i rozszerzalną konstrukcję obudowy czujnika |
AU2018368199A AU2018368199B2 (en) | 2017-11-14 | 2018-07-23 | Battery module to which battery cell pressing-type end plate and expandable sensing housing structure are applied |
EP18879466.3A EP3651231B1 (en) | 2017-11-14 | 2018-07-23 | Battery module to which battery cell pressing-type end plate and expandable sensing housing structure are applied |
JP2019556619A JP7045536B2 (ja) | 2017-11-14 | 2018-07-23 | バッテリーセル加圧型エンドプレート及び拡張型センシングハウジング構造が適用されたバッテリーモジュール |
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Also Published As
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CN209119183U (zh) | 2019-07-16 |
JP7045536B2 (ja) | 2022-04-01 |
AU2018368199A1 (en) | 2020-02-06 |
US20200176745A1 (en) | 2020-06-04 |
EP3651231A1 (en) | 2020-05-13 |
CN109920944B (zh) | 2020-06-16 |
JP2020517080A (ja) | 2020-06-11 |
KR20190054709A (ko) | 2019-05-22 |
EP3651231A4 (en) | 2020-06-17 |
KR102159347B1 (ko) | 2020-09-23 |
AU2018368199B2 (en) | 2023-12-21 |
US11764435B2 (en) | 2023-09-19 |
CN109920944A (zh) | 2019-06-21 |
EP3651231B1 (en) | 2023-09-06 |
PL3651231T3 (pl) | 2023-11-06 |
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