CN113381118B - Rechargeable battery pack - Google Patents
Rechargeable battery pack Download PDFInfo
- Publication number
- CN113381118B CN113381118B CN202110207964.3A CN202110207964A CN113381118B CN 113381118 B CN113381118 B CN 113381118B CN 202110207964 A CN202110207964 A CN 202110207964A CN 113381118 B CN113381118 B CN 113381118B
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- Prior art keywords
- unit
- holder
- spacer
- rechargeable battery
- battery pack
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Classifications
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
A rechargeable battery pack is disclosed. The rechargeable battery pack includes: a battery case configured to have an accommodation space formed therein; a plurality of unit modules inserted into the receiving space and each formed by connecting a plurality of unit battery cells; a holder unit configured to support the unit module inside the battery case; and a bus bar disposed at an upper part of the holder unit and connected to the electrode terminals of the unit battery cells.
Description
Technical Field
The present invention relates to a rechargeable battery pack that stably maintains an appropriate distance between unit modules.
Background
Unlike primary batteries, rechargeable batteries can be repeatedly charged and discharged. Small-capacity rechargeable batteries are used in portable small-sized electronic devices such as mobile phones, notebook computers, and camcorders, while large-capacity rechargeable batteries are used as power sources for driving motors such as electric bicycles, scooters, electric vehicles, and forklifts.
The rechargeable battery may be used not only as one unit cell but also as a rechargeable battery pack in which a plurality of unit cells are connected in parallel or in series to realize a large capacity. For example, the rechargeable battery pack uses tabs to connect unit battery cells in series or parallel, and may have a structure in which current flows from one tab.
In the case of using a plurality of unit battery cells, the rechargeable battery pack should have a structure capable of effectively dissipating heat generated during charge and discharge for high-output response and a structure capable of effectively fixing the unit battery cells in response to shock and vibration.
On the other hand, the unit battery cells are fixed inside the battery case by the holders, and since a separation space is formed between the unit battery cells, it is difficult to maintain a stable insulating state due to the interference of voltages generated between the unit battery cells.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
Exemplary embodiments of the present invention have been made in an effort to provide a rechargeable battery pack capable of maintaining a stable insulating state by maintaining an appropriate distance between unit modules.
An exemplary embodiment of the present invention provides a rechargeable battery pack including: a battery case configured to have an accommodation space formed therein; a plurality of unit modules inserted into the receiving space and each formed by connecting a plurality of unit battery cells; a holder unit configured to support the unit module inside the battery case; and a bus bar disposed at an upper part of the holder unit and connected to the electrode terminals of the unit battery cells.
The holder unit may include: a lower holder configured to support the unit modules in the battery case and including a plurality of first spacers disposed between the unit modules; and an upper holder configured to support an upper portion of the unit module, detachably coupled to the first spacers, and including a plurality of second spacers disposed between the unit modules.
A plurality of through holes may be formed at the upper side of the second plate to expose electrode terminals of the unit battery cells. The plurality of through holes may form a plurality of columns and a plurality of rows on the upper side of the second plate.
The lower holder may include: a first board configured to mount a unit module thereon; a first holder configured to have a first insertion portion into which the unit module is inserted; and a first spacer configured to connect the first plate and the first holder and disposed between the unit modules.
The upper holder may include: a second plate disposed at an upper portion of the unit module to have a through-hole through which a portion of the unit module is exposed; a second holder drawn from a lower portion of the second plate to have a second insertion portion into which the unit module is inserted; and a second spacer configured to protrude from a lower portion of the second plate, disposed between the unit modules, and connected to the first spacer.
The first spacer and the second spacer may be detachably connected.
The first connection protrusion may protrude from an end of the first spacer, and the second connection protrusion may protrude from an end of the second spacer. The first and second connection protrusions may be in surface contact in a state where the first and second spacers are connected.
An insertion groove may be formed at an end of the first spacer, and an insertion protrusion may protrude from an end of the second spacer. The insertion protrusion may be inserted into the insertion groove when the first spacer and the second spacer are connected.
A guide protrusion for guiding the mounted state of the bus bar may protrude from the second plate.
The guide protrusion may protrude to have a rounded shape along the through hole to guide an arrangement state of the bus bar.
The bus bar may include: a plurality of first bus bars disposed at an edge of an upper side of the second plate and connected to the electrode terminals; and a plurality of second bus bars disposed on side surfaces between the first bus bars over the holder unit to be electrically connected to the unit battery cells.
The first bus bar may include: a first main body portion provided on a side surface of the through hole to have a long length in a first direction at an edge of an upper side of the second plate; and a plurality of first lead portions configured to protrude obliquely from a side surface of the first body portion in a second direction intersecting the first direction.
The first lead portion may be disposed between the through holes.
The first lead portion may protrude obliquely from a side surface of the first body portion at an angle in a range of 45 degrees to 60 degrees.
The first bus bar and the unit module may be electrically connected to each other by a wire member at an upper side of the holder unit.
A stopper protrusion restricting movement of the bus bar may protrude from a surface of the second plate.
According to an exemplary embodiment of the present invention, a rechargeable battery pack may be mounted to maintain a stable insulating state by stably maintaining an appropriate distance between unit modules, without voltage interference occurring between battery cells.
Drawings
Fig. 1 is a schematic perspective view showing a state in which a cover unit of a rechargeable battery pack is removed according to a first exemplary embodiment of the present invention.
Fig. 2 is a schematic plan view showing a state in which a cover unit of the rechargeable battery pack of fig. 1 is removed.
Fig. 3 is a schematic cross-sectional view showing a state in which the unit modules are fixed by the holder unit according to the first exemplary embodiment of the present invention.
Fig. 4 shows a schematic cross-sectional perspective view of a main part of a holder unit according to a first exemplary embodiment of the invention.
Fig. 5 is a schematic view showing a main portion of a connection state of a first spacer and a second spacer according to a first exemplary embodiment of the present invention.
Fig. 6 shows a schematic top plan view of a connection state of the bus bar in part a of fig. 2.
Fig. 7 is a schematic view showing a main part of a connection state of a bus bar according to a first exemplary embodiment of the present invention.
Fig. 8 shows a schematic top plan view of a first bus bar according to a first exemplary embodiment of the present invention.
Fig. 9 shows a schematic top plan view of a second bus bar according to a first exemplary embodiment of the present invention.
Fig. 10 is a schematic view showing a main portion of a connection state of a first spacer and a second spacer according to a second exemplary embodiment of the present invention.
Fig. 11 shows a schematic perspective view of a rechargeable battery pack according to a third exemplary embodiment of the present invention.
Fig. 12 shows a schematic perspective view of a rechargeable battery pack according to a fourth exemplary embodiment of the present invention.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As will be recognized by those skilled in the art, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the invention. The drawings and description are to be regarded as illustrative in nature and not as restrictive. Like numbers refer to like elements throughout.
Fig. 1 illustrates a schematic perspective view of a state in which a cap unit of a rechargeable battery pack is removed according to a first exemplary embodiment of the present invention, fig. 2 illustrates a schematic plan view of a state in which a cap unit of the rechargeable battery pack of fig. 1 is removed, fig. 3 illustrates a schematic cross-sectional view of a state in which a unit module is fixed by a holder unit according to a first exemplary embodiment of the present invention, fig. 4 illustrates a schematic cross-sectional perspective view of a main portion of a holder unit according to a first exemplary embodiment of the present invention, and fig. 5 illustrates a schematic view of a main portion of a connection state of a first spacer and a second spacer according to a first exemplary embodiment of the present invention.
As shown in fig. 1 to 5, a rechargeable battery pack 100 according to an exemplary embodiment of the present invention includes: a battery case 10 configured to have an accommodation space 11 formed therein; a unit module 20 inserted into the receiving space 11 and formed by connecting a plurality of unit battery cells 21; a holder unit 30 configured to support the unit module 20 inside the battery case 10; and bus bars 41 and 61 provided at the upper part of the holder unit 30 to be connected to electrode terminals of the unit battery cells.
In the present exemplary embodiment, the battery case 10 may have a rectangular parallelepiped shape, and the receiving space 11 may be formed therein. The unit modules 20 may be received in the receiving spaces 11 of the battery case 10. The battery case 10 may be sealed by using the cap unit 12 (see fig. 11) in a state in which the unit modules 20 are received. The coolant input and output unit 14 may be formed in a side surface of the battery case 10.
The unit module 20 may be formed to include two unit battery cells 21 manufactured as rechargeable batteries. The unit cell 21 may be connected to bus bars 41 and 61, which will be described later.
The unit cell 21 may be formed as a conventional cylindrical rechargeable battery that repeatedly performs charge and discharge.
The unit module 20 may be installed in the following state: the unit modules 20 are supported at the lower surface of the battery case 10 by the holder units 30 while being arranged in a plurality of columns and a plurality of rows within the battery case 10.
The holder unit 30 may include: a lower holder 31 supporting a plurality of unit modules 20 within the battery case 10 and including a plurality of first spacers 315 disposed between the plurality of unit modules 20; and an upper holder 33 supporting an upper portion of the unit module 20 and including a plurality of second spacers 335, the plurality of second spacers 335 being detachably connected to the plurality of first spacers 315 and disposed between the unit modules 20.
The lower holder 31 may include: a first board 311 on which the unit module 20 is mounted; a first holder 313 having a first insertion portion 313a into which the unit module 20 is inserted; and a plurality of first spacers 315 disposed between adjacent unit modules 20 to connect the first plates 311 and the first holders 313.
The first plate 311 is mounted at the lower surface of the receiving space 11 of the battery case 10, and the lower part of the unit module 20 may be located at the upper surface thereof.
The first spacers 315 may protrude from the first plate 311.
Each of the first spacers 315 may protrude to a position between the unit modules 20 by fixing a first end thereof to the first plate 311 and forming a second end thereof having a long length in a direction toward the upper holder 33.
The first spacers 315 may be mounted between the plurality of unit modules 20 while being detachably connected to the second spacers 335, and therefore, they may be mounted so that a stable insulating state is maintained by stably maintaining an appropriate distance between the unit modules 20, without voltage interference occurring between the battery cells.
In addition, the first holders 313 may be connected to the side surfaces of the first spacers 315 to support portions of the side surfaces of the unit modules 20.
The first holder 313 may be connected to the side surface of the first spacer 315 at an upper position spaced apart from the first plate 311, and a plurality of first insertion parts 313a into which the unit battery cells 21 are inserted may be formed.
The first insertion portions 313a are portions into which the unit battery cells 21 constituting the unit module 20 are inserted, and a number of first insertion portions 313a corresponding to the number of the unit battery cells 21 may be formed in the first holder 313.
The first insertion portions 313a may be formed in the first holders 313 in a plurality of rows and columns corresponding to the number of the unit battery cells 21, thereby stably positioning the unit battery cells 21 to be disposed inside the battery case 10.
In addition, the upper portion of the unit module 20 may be fixed by the upper holder 33.
The second spacers 335 may protrude from the lower portion of the upper holder 33 to stably support the upper portion of the unit module 20 in a state of being connected to the first spacers 315.
More specifically, the upper holder 33 is located on the upper portion of the unit module 20, and may include: a second plate 331 having a through hole 33a, a portion of the unit module 20 being exposed through the through hole 33 a; a second holder 333 protruding from the second plate 331 to have a plurality of second insertion portions 333a into which the unit modules 20 are inserted; and second spacers 335 protruding from the second plate 331 to a position between adjacent unit modules 20 to be connected to the first spacers 315.
The second plate 331 may be located at an upper portion of the unit module 20, and may form an open through-hole 33a to expose the electrode terminals of the unit battery cells 21 to the outside.
The through-holes 33a may be formed in the second plate 331 in an open state such that the upper parts of the two unit battery cells 21 are partially exposed to the outside together. Thus, the through-holes 33a may be formed in the second plate 331 to connect the electrode terminals of the unit battery cells 21 by using the bus bars 41 and 61 provided on the second plate 331. This will be described in more detail when the bus bars 41 and 61 are described below.
Meanwhile, a second holder 333 may be formed at a lower portion of the second plate 331, the second holder 333 being fixed in a state in which an upper portion of the unit module 20 is inserted.
The second holder 333 protrudes from the lower portion of the second plate 331, and a second insertion portion 333a may be formed, and the upper portion of the unit cell 21 is inserted and fixed in the second insertion portion 333 a.
The second insertion parts 333a are formed in the second holder 333, and more specifically, a number of second insertion parts 333a corresponding to the number of unit battery cells 21 may be formed in the second holder 333. The second insertion portion 333a may be formed in the second holder 333 to have a size corresponding to the diameter of the unit battery cell 21.
The second spacer 335 may be installed in the second plate 331 to be supported in a state of being connected to the first spacer 315.
A first end of the second spacer 335 may be connected to the second plate 331, and a second end of the second spacer 335 may be connected to the first spacer 315.
The second spacer 335 may be formed to have a length equal to or similar to that of the first spacer 315, and may be detachably connected to an upper position of the first spacer 315.
For this, first and second connection protrusions 315a and 335a, which are in surface contact with each other, may be formed in the first and second spacers 315 and 335, respectively.
The first connection protrusion 315a may protrude from an upper portion of the first spacer 315 to have a smaller cross-sectional area than that of the first spacer 315 in a width direction thereof.
Further, the second connection protrusion 335a may protrude from a lower portion of the second spacer 335 to have a smaller cross-sectional area than that of the second spacer 335 in a width direction thereof.
The first and second connection protrusions 315a and 335a may protrude from the end portions of the first and second spacers 315 and 335, respectively, to have the same or similar size, and thus the first and second spacers 315 and 335 may be fixed to contact each other in a connected state therebetween.
Accordingly, the upper and lower holders 33 and 31 may be mounted to be stably fixed to or detachable from the unit modules 20 located therebetween.
Meanwhile, bus bars 41 and 61 connected to electrode terminals of the unit battery cells 21 may be disposed at the upper part of the second plate 331.
Fig. 6 shows a schematic top plan view of a connection state of the bus bars in part a of fig. 2, fig. 7 shows a schematic view of a main portion of a connection state of the bus bars according to a first exemplary embodiment of the present invention, fig. 8 shows a schematic top plan view of the first bus bars according to the first exemplary embodiment of the present invention, and fig. 9 shows a schematic top plan view of the second bus bars according to the first exemplary embodiment of the present invention.
The bus bars 41 and 61 may be disposed on the second plate 331 to be connected to electrode terminals of the unit battery cells 21.
More specifically, the bus bars 41 and 61 may include: a plurality of first bus bars 41 disposed at opposite edges of an upper side of the second plate 331 to be connected to the electrode terminals; and a plurality of second bus bars 61 provided on side surfaces of the first bus bars 41 on an upper side of the second plate 331 to be connected to the electrode terminals.
The first bus bar 41 may be installed at opposite edges of the holder unit 30 to be electrically connected to the electrode terminals. That is, the first bus bars 41 may be mounted to the first side and the second side of the upper side of the holder unit 30, respectively.
Each of the primary bus bars 41 may include: a first body portion 411 located on a side surface of the through hole 33a at an opposite edge of an upper side of the second plate 331; and a plurality of first lead portions 413 obliquely protruding from a side surface of the first body portion 411.
The first body portion 411 may be disposed at opposite edges of the second plate 331, and may be disposed on side surfaces of the through holes 33a formed in the first and last columns along the opposite edges of the second plate 331.
The first lead portion 413 may protrude from a side surface of the first body portion 411.
The first lead portion 413 may protrude from a side surface of the first body portion 411 to be located between the through holes 33 a.
The first lead portion 413 may protrude obliquely from a side surface of the first body portion 411. More specifically, the first lead portion 413 may protrude obliquely from the side surface of the first body portion 411 at an angle ranging from 45 degrees to 60 degrees.
Thus, the first lead portion 413 may protrude obliquely from the side surface of the first body portion 411 to ensure stable connection without interference between components in connecting the bus bar to the electrode terminal at the upper side of the second plate 331.
The first lead portion 413 may protrude from a side surface of the first body portion 411, and may protrude to be inserted to a position between every two through holes 33a among the through holes 33a formed in and between the first and last rows along the edge of the second plate 331. Here, the through hole 33a may be formed in a slit shape passing through the upper side of the second plate 331 at an inclination angle corresponding to the inclination angle of the first lead portion 413.
The first lead portions 413 may protrude from the side surface of the first body portion 411 such that they are inserted between every two through holes 33a among the through holes 33a formed in and between the first and last rows. This is to insert the second lead portions 613a of the second bus bar 61 positioned adjacent to the first bus bar 41 in an alternating state between the through holes 33 a.
The first lead portion 413 may be connected to the unit module 20 through the wire member 50 in a state of being located between the through holes 33 a.
The wire member 50 may be connected between the first lead portion 413 and the unit module 20 at the upper side of the second plate 331, and may be electrically connected to the electrode terminal while stably maintaining the mounted state of the unit module 20.
The wire member 50 may be partially bent in the length direction while connecting the unit module 20 and the first bus bar 41. This is to prevent interference between adjacent components in connecting the unit modules 20 and the first bus bar 41 by using the wire members 50.
Thus, the lead member 50 can electrically connect the bus bars 41 and 61 with the electrode terminals while stably maintaining the mounted state of the unit module 20.
Meanwhile, the second bus bars 61 may be disposed between the first bus bars 41 in the second plate 331.
The second bus bar 61 may be disposed between the first bus bar 41 disposed at the first edge and the second edge of the second plate 331.
That is, the second bus bar 61 may be disposed at a position between columns in the through holes 33a formed in a plurality of columns and a plurality of rows.
More specifically, the second bus bar 61 may include: a second body portion 611 having a long length in the first direction, positioned at a position between the through holes 33a of the second plate 331; and a composite lead portion 613 protruding obliquely from the opposite side of the second body portion 611 in a second direction intersecting the first direction.
The plurality of second body parts 611 may be formed to have the same or similar length as the first body parts 411, and may be disposed at positions between the through holes 33a at positions between a pair of first body parts 411 disposed at opposite edges of the second plate 331 at equal intervals along the first direction.
The composite lead portion 613 may protrude obliquely from a side surface of the second body portion 611.
The composite lead portion 613 may include: a plurality of second lead portions 613a protruding obliquely from the first side of the second body portion 611 in a second direction crossing the first direction; and a plurality of third lead portions 613b protruding obliquely from the second side of the second body portion 611 in a direction opposite to the second direction. The composite lead portion 613 may protrude from respective opposite sides of the second body portion 611 to be inserted into positions between a plurality of rows among the through holes 33a formed in a plurality of columns and a plurality of rows at an upper side of the second plate 331.
The second lead portion 613a may protrude from the first side of the second body portion 611 in a second direction crossing the first direction to be located between the through holes 33 a.
More specifically, the second lead portion 613a may protrude obliquely from the side surface of the second body portion 611 within the range of the angle α of 45 degrees to 60 degrees. That is, the second lead portion 613a may protrude from the side surface of the second body portion 611 at the same angle by the same or similar length as the first lead portion 413 of the first bus bar 41.
Thus, the second lead portion 613a may protrude obliquely from the side surface of the second body portion 611 to ensure stable connection without interference between components in connecting the bus bar to the electrode terminal at the upper side of the second plate 331.
The second lead portion 613a may protrude from a side surface of the second body portion 611 and may protrude so as to be inserted into a position between the through holes 33a formed between the pair of first bus bars 41 provided at opposite edges of the upper side of the second plate 331.
The second lead portion 613a may protrude from a side surface of the second body portion 611 such that the second lead portion 613a is inserted into a position between every two through holes 33a among the through holes 33a formed between the first and last rows.
This is to insert the second lead portions 613a of the second bus bars 61 located near the second bus bars 61 in an alternating state into positions between the through holes 33 a.
Meanwhile, the third lead portion 613b may protrude from the second side of the second body portion 611.
The third lead portion 613b may protrude from an opposite side surface of the second body portion 611 from which the second lead portion 613a protrudes.
The third lead portion 613b may protrude from the side surface of the second body portion 611 at the same inclination angle as that of the second lead portion 613 a. That is, the third lead portion 613b is formed in line with the second lead portion 613a with the second body portion 611 interposed therebetween, and the third lead portion 613b may protrude from a side surface of the second body portion 611.
The composite lead portion 613 may be connected to the unit module 20 through the wire member 50 in a state of being located between the through holes 33 a.
The wire member 50 may be connected between the unit module 20 and each of the second and third lead parts 613a and 613b from the upper side of the holder unit 30, and may be electrically connected to the electrode terminal of the unit module 20 while stably maintaining the mounted state of the unit module 20.
In this way, the lead member 50 can electrically connect the bus bar and the electrode terminal while stably maintaining the mounted state of the unit module 20.
Meanwhile, the guide protrusion 70 may protrude from the through hole 33 a.
The guide protrusion 70 protruding upward from the open edge of the through hole 33a may protrude in a rounded shape corresponding to the long shape of the through hole 33 a. Accordingly, the guide protrusions 70 are formed to protrude from each of the through holes 33a, and thus the positions of the bus bars 41 and 61 disposed between the through holes 33a can be stably guided.
Meanwhile, the stopper protrusions 80 fixing the positions of the bus bars 41 and 61 may protrude from the second plate 331. A pair of stopper protrusions 80 may protrude from an upper side of the second plate 331.
Fig. 10 is a schematic view showing a main portion of a connection state of a first spacer and a second spacer according to a second exemplary embodiment of the present invention. The same reference numerals as those of fig. 1 to 9 denote the same or similar members having the same or similar functions. Hereinafter, detailed description of the same reference numerals will be omitted.
As shown in fig. 10, in the rechargeable battery pack according to the second exemplary embodiment of the present invention, the insertion groove 315b may be recessed from the end of the first spacer 315, and the insertion protrusion 335b may be formed at the end of the second spacer 335.
Accordingly, the first and second spacers 315 and 335 may be connected in a state in which the insertion protrusion 335b is inserted into the insertion groove 315b, and thus, the first and second spacers 315 and 335 may be more stably connected in a detachable state.
Fig. 11 is a schematic perspective view illustrating a stacked state of a rechargeable battery pack according to a third exemplary embodiment of the present invention. The same reference numerals as those of fig. 1 to 10 denote the same or similar members having the same or similar functions. Hereinafter, detailed description of the same reference numerals will be omitted.
The above-described rechargeable battery packs 100 may be stacked in the same size in the vertical direction.
That is, referring to fig. 11, according to the third exemplary embodiment of the present invention, the rechargeable battery packs 300 may be stacked in the vertical direction such that the receiving spaces 11 may form multiple stages in the vertical direction, and the unit modules fixed to the holder units 30 may be mounted in each receiving space 11. Here, each receiving space 11 may be formed to have the same size in the vertical direction of the battery case 10.
Further, the coolant input and output unit 14 may be mounted in each receiving space 11 on a side surface of the battery case 10.
Further, in the rechargeable battery pack 300 of the third exemplary embodiment, connection terminals (not shown) electrically connected to bus bars may be installed in each of the rechargeable battery packs stacked in multiple stages.
Accordingly, the rechargeable battery pack 300 stacked in multiple stages may be electrically connected through the connection terminals.
As described above, the rechargeable battery pack 300 of the present exemplary embodiment is formed in a multi-layered structure having the same size corresponding to the battery capacity, thereby realizing various battery capacities.
Fig. 12 is a schematic perspective view illustrating a stacked state of a rechargeable battery pack according to a fourth exemplary embodiment of the present invention. The same reference numerals as those of fig. 1 to 11 denote the same or similar members having the same or similar functions. Hereinafter, detailed description of the same reference numerals will be omitted.
As shown in fig. 12, in the rechargeable battery pack 400 according to the fourth exemplary embodiment of the present invention, the above-described rechargeable battery packs 100 may be stacked to have different sizes in the vertical direction.
That is, according to the fourth exemplary embodiment of the present invention, the rechargeable battery packs 400 may be stacked to have different sizes in the vertical direction, so that the receiving spaces 11 may be formed in multiple stages in the vertical direction, and the unit modules fixed to the holder units 30 may be installed in each receiving space 11.
Here, each receiving space 11 may be formed to have a different size in the vertical direction of the battery case 10.
That is, since the rechargeable battery pack 400 of the fourth exemplary embodiment is formed in a multi-stage stack type having a size reduced in an upward direction, the degree of freedom of installation can be improved.
Further, in the rechargeable battery pack 400 of the fourth exemplary embodiment, connection terminals (not shown) electrically connected to bus bars may be installed in each of the rechargeable battery packs stacked in multiple stages.
Accordingly, the rechargeable battery packs 400 stacked in multiple stages may be electrically connected through the connection terminals.
While the invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
< description of symbols >
10. Battery case 11 accommodation space
20. Unit module 21 unit cell
30. Retainer unit 31 lower retainer
311. First plate 313 first holder
313a first insertion portion 315 first spacer
33. Upper retainer 331 second plate
333. Second insertion portion of second holder 333a
33a through hole 335 second spacer
41. First bus bar 411 first main body portion
413. First lead portion 50 wire member
61. Second bus bar 611 second body portion
613. Second lead portion of composite lead portion 613a
613b third lead portion 70 guide projection
80. The stop protrusion 315b is inserted into the groove
335b insertion projection
Claims (14)
1. A rechargeable battery pack comprising:
a battery case configured to have an accommodation space formed therein;
a plurality of unit modules inserted into the receiving space and each formed by connecting a plurality of unit battery cells;
a holder unit configured to support the unit module inside the battery case; and
a bus bar disposed at an upper part of the holder unit and connected to electrode terminals of the unit battery cells,
wherein the holder unit includes:
a lower holder configured to support the unit modules in the battery case and including a plurality of first spacers disposed between the unit modules; and
an upper holder configured to support an upper portion of the unit module, detachably coupled to the first spacers, and including a plurality of second spacers disposed between the unit modules,
wherein the lower holder comprises:
a first board configured to mount the unit modules thereon;
a first holder configured to have a first insertion portion into which the unit module is inserted; and
a first spacer configured to connect the first plate and the first holder and disposed between the unit modules,
wherein the first holder is connected to a side surface of the first spacer at an upper position spaced apart from the first plate, and one end of the first spacer protrudes beyond the first holder toward the upper holder.
2. The rechargeable battery pack according to claim 1, wherein
A plurality of through holes formed at the upper side of the second plate to expose the electrode terminals of the unit battery cells, an
The plurality of through holes form a plurality of columns and a plurality of rows at an upper side of the second plate.
3. The rechargeable battery pack according to claim 1, wherein
The upper holder includes:
a second plate disposed at an upper portion of the unit module to have a through-hole through which a portion of the unit module is exposed;
a second holder which is drawn out from a lower portion of the second plate to have a second insertion portion into which the unit module is inserted; and
and a second spacer configured to protrude from the lower portion of the second plate, disposed between the unit modules, and connected to the first spacer.
4. The rechargeable battery pack according to claim 3, wherein
The first spacer and the second spacer are detachably connected.
5. The rechargeable battery pack according to claim 4, wherein
A first connection protrusion protruding from an end of the first spacer, a second connection protrusion protruding from an end of the second spacer, and
the first and second connection protrusions are in surface contact in a state where the first and second spacers are connected.
6. The rechargeable battery pack according to claim 4, wherein
An insertion groove formed at an end of the first spacer, an insertion protrusion protruding from an end of the second spacer, and
the insertion protrusion is inserted into the insertion groove when the first spacer and the second spacer are connected.
7. The rechargeable battery pack according to claim 4, wherein
A guide protrusion for guiding the mounted state of the bus bar protrudes from the second plate.
8. The rechargeable battery pack according to claim 7, wherein
The guide protrusion protrudes to have a rounded shape along the through hole to guide an arrangement state of the bus bar.
9. The rechargeable battery pack according to claim 8, wherein
The bus bar includes:
a plurality of first bus bars disposed at an edge of an upper side of the second plate and connected to the electrode terminals; and
a plurality of second bus bars provided on side surfaces of the first bus bars at an upper side of the holder unit to be connected to the electrode terminals.
10. The rechargeable battery pack according to claim 9, wherein
The first bus bar includes:
a first main body portion provided on a side surface of the through hole to have a long length in a first direction at the edge of the upper side of the second plate; and
a plurality of first lead portions configured to protrude obliquely from a side surface of the first body portion in a second direction intersecting the first direction.
11. The rechargeable battery pack according to claim 10, wherein
The first lead portion is disposed between the through holes.
12. The rechargeable battery pack according to claim 11, wherein
The first lead portion protrudes obliquely from the side surface of the first body portion at an angle in the range of 45 degrees to 60 degrees.
13. The rechargeable battery pack according to claim 12, wherein
The first bus bar and the unit module are electrically connected to each other by a wire member at an upper side of the holder unit.
14. The rechargeable battery pack according to claim 13, wherein
A stopper protrusion restricting movement of the bus bar protrudes from a surface of the second plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020200022957A KR20210108127A (en) | 2020-02-25 | 2020-02-25 | Rechargeable battery pack |
| KR10-2020-0022957 | 2020-02-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113381118A CN113381118A (en) | 2021-09-10 |
| CN113381118B true CN113381118B (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110207964.3A Active CN113381118B (en) | 2020-02-25 | 2021-02-24 | Rechargeable battery pack |
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| Country | Link |
|---|---|
| KR (1) | KR20210108127A (en) |
| CN (1) | CN113381118B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230113884A1 (en) * | 2021-10-12 | 2023-04-13 | Lg Energy Solution, Ltd. | Battery pack and vehicle including the same |
| CN114597597B (en) * | 2022-01-24 | 2022-09-13 | 福建时代星云科技有限公司 | Battery cell arrangement structure of battery pack and arrangement method thereof |
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Also Published As
| Publication number | Publication date |
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| CN113381118A (en) | 2021-09-10 |
| KR20210108127A (en) | 2021-09-02 |
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