CN116093528B - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
CN116093528B
CN116093528B CN202310201344.8A CN202310201344A CN116093528B CN 116093528 B CN116093528 B CN 116093528B CN 202310201344 A CN202310201344 A CN 202310201344A CN 116093528 B CN116093528 B CN 116093528B
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CN
China
Prior art keywords
heat dissipation
battery
cover plate
connecting piece
battery cell
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Active
Application number
CN202310201344.8A
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Chinese (zh)
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CN116093528A (en
Inventor
王乾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Times Huajing New Energy Co ltd
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Suzhou Times Huajing New Energy Co ltd
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Priority to CN202310201344.8A priority Critical patent/CN116093528B/en
Publication of CN116093528A publication Critical patent/CN116093528A/en
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Publication of CN116093528B publication Critical patent/CN116093528B/en
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Classifications

    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6553—Terminals or leads
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • 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
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • 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)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a battery pack, which relates to the technical field of batteries and comprises a shell and a battery module arranged in a shell mounting cavity, wherein the battery module comprises a lower bracket and a lower connecting piece which are mutually attached, and an upper bracket and an upper connecting piece which are mutually attached, wherein both the lower bracket and the lower connecting piece are provided with heat dissipation openings, both the lower connecting piece and the upper connecting piece are provided with conductors, and the conductors are positioned in the heat dissipation openings. Compared with the traditional method of connecting the battery cell polar end by adopting a welding mode, the conductor of the invention reduces the blocking of heat energy generated by a welding layer on the battery cell polar end, thereby being beneficial to improving the heat dissipation effect on the battery cell polar end. And when the battery pack is used for supplying power or storing electricity, the heat energy generated by the contact part of the polar end of the battery core and the conductor and the heat energy generated by the edge part (not in contact with the conductor) of the polar end of the battery core can be further dissipated in the heat dissipation port, so that the heat dissipation effect is further improved.

Description

Battery pack
Technical Field
The invention relates to the technical field of batteries, in particular to a battery pack.
Background
The application of battery technology makes the battery technology indispensible from the life of people, and along with the development of technology, the requirements on the capacity, the voltage and the like of the battery are also improved, so that a battery pack is developed. The battery pack is generally formed by connecting a plurality of battery cells in series and parallel in a welding manner through welding equipment to form welding fixation, and assembling accessories such as a battery cover plate, a battery bracket, a battery shell and the like.
In the existing battery pack assembly process, a plurality of battery cells are connected in series and parallel in a welding mode, so that the polarity ends of the battery cells are covered by a welding layer, generated heat is easily concentrated at the polarity ends of the battery cells, heat dissipation of the polarity ends of the battery cells is not facilitated, and stable use of the battery pack is affected.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, battery packs adopt a welding mode to connect battery cells in series and parallel, so that the polar ends of the battery cells are covered by wrapping, heat generated by the battery cells is concentrated at the polar ends of the battery cells, heat dissipation of the polar ends of the battery cells is not facilitated, and the stable use of the battery packs is affected.
In order to achieve the above purpose, the invention adopts the following technical scheme: the battery pack comprises a shell and a battery module arranged in an installation cavity of the shell, wherein at least two battery packs with opposite electrode directions are arranged in the battery module, the two battery packs are connected in series, and each battery pack comprises a plurality of battery cells with the same electrode directions.
The battery module comprises a lower bracket and a lower connecting sheet which are attached to each other, and an upper bracket and an upper connecting sheet which are attached to each other.
The lower support and the upper support are respectively provided with a heat dissipation opening, the lower connecting sheet and the upper connecting sheet are respectively provided with a conductor, the conductor is positioned in the heat dissipation opening and is contacted with the polar end of the battery cell, and the lower connecting sheet and the upper connecting sheet are respectively connected with the battery cells with the same electrode direction in parallel.
The polar end of the battery core refers to an electrode, and the conductor can be a copper sheet or a nickel sheet.
Further, in the embodiment of the present invention, the upper connecting piece and the lower connecting piece are respectively provided with a plurality of conductors, the upper connecting piece is a conductive metal piece or the upper connecting piece is provided with a circuit for connecting the conductors, the lower connecting piece is a conductive metal piece or the lower connecting piece is provided with a circuit for connecting the conductors, and the upper connecting piece and the lower connecting piece are used for electrically connecting the plurality of conductors of the upper connecting piece.
Further, in the embodiment of the present invention, the conductor of the lower connecting piece protrudes out of the plane of the lower connecting piece, the conductor of the upper connecting piece protrudes out of the plane of the upper connecting piece, and heat dissipation holes are formed at positions of the lower connecting piece and the upper connecting piece corresponding to the conductor positions on the lower connecting piece and the upper connecting piece, and the heat dissipation holes are communicated with the mounting cavity. The heat energy generated by the battery cell can be directly transferred to the conductor, and the air medium in the heat dissipation hole can conduct and dissipate heat to the conductor and further diffuse in the heat dissipation hole, and then diffuse to the mounting cavity of the shell through the heat dissipation hole, so that the heat energy on the polar end of the battery cell is greatly diffused, the heat energy is not easy to concentrate on the polar end of the battery cell, and the stable use of the battery cell is affected.
Still further, in an embodiment of the present invention, the conductor is smaller than the heat dissipation port, a heat dissipation gap is left between the conductor and a side wall of the heat dissipation port, the heat dissipation gap is communicated with the heat dissipation hole, and the heat dissipation port is communicated with the mounting cavity through the heat dissipation hole. Therefore, the heat energy generated by the polarity end of the battery cell can be directly dissipated in the heat dissipation port through the heat dissipation gap to dissipate heat, so that the heat energy is not easy to concentrate on the polarity end of the battery cell.
Further, in an embodiment of the present invention, the battery module further includes an upper cover plate and a lower cover plate, wherein the upper cover plate is fixedly connected with the upper bracket, and the lower cover plate is fixedly connected with the lower bracket.
The upper cover plate is attached to the upper connecting sheet, and the upper connecting sheet is pressed and fixed on the upper bracket.
The lower cover plate is attached to the lower connecting piece, and the lower connecting piece is pressed and fixed on the lower support.
Further, in the embodiment of the present invention, the upper cover plate and the lower cover plate are respectively provided with an avoidance groove, the upper cover plate avoidance groove corresponds to the upper bracket heat dissipation hole, and the upper bracket heat dissipation hole is communicated with the housing installation cavity through the upper cover plate avoidance groove. So that the heat energy generated by the polar end of the battery cell can be dissipated into the housing mounting cavity through the heat dissipation opening and the heat dissipation hole to be subjected to heat dissipation treatment.
The lower cover plate avoiding groove corresponds to the lower support heat dissipation hole, and the lower support heat dissipation hole is communicated with the shell installation cavity through the lower cover plate avoiding groove.
Still further, in an embodiment of the present invention, the lower cover plate is fixed to the bottom of the housing mounting cavity, a non-conductive clamping structure is disposed between the upper cover plate and the housing, one end of the clamping structure is clamped with the housing, and the other end of the clamping structure is clamped with the upper cover plate, so as to fix the housing and the battery module.
Further, in the embodiment of the invention, a plurality of heat dissipation grooves are formed in the side wall of the shell at intervals, and the heat dissipation grooves are communicated with the mounting cavity. The heat energy generated by the battery cell is dispersed in the shell installation cavity, and the heat energy in the shell installation cavity can be radiated to the outside through the heat radiation groove communicated with the outside, so that the temperature in the shell installation cavity is reduced, and the temperature of the polarity end of the battery cell is reduced.
Further, in the embodiment of the present invention, the lower bracket and the upper bracket are respectively provided with a raised annular wall, the annular walls form a fitting cavity for accommodating the polar end of the battery cell, the heat dissipation port is located in the fitting cavity, the side surface of the battery cell is attached to the fitting cavity or a gap is reserved between the side surface of the battery cell and the fitting cavity, the gap is communicated with a space where the polar end of the battery cell is located, and the gap is also communicated with the housing mounting cavity. So that the heat energy generated by the polarity end of the battery cell is dissipated in the mounting cavity through the side surface of the battery cell and the reserved gap of the embedded cavity, and the heat energy is prevented from being concentrated at the polarity end of the battery cell.
Still further, in an embodiment of the present invention, the inner bottom surface of the embedding cavity has a raised heat dissipating platform, the heat dissipating platform surrounds the heat dissipating opening, the polar end edge of the battery cell abuts against the heat dissipating platform, a ventilation slot is formed between the outer wall of the heat dissipating platform and the inner wall of the embedding cavity, and the polar end edge of the battery cell is exposed in the ventilation slot. The polarity end of the battery cell is not contacted with the inner bottom surface of the embedded cavity except the part contacted with the conductor, namely the polarity end edge part of the battery cell is not contacted with the inner bottom surface of the embedded cavity, and the polarity end edge part of the battery cell is exposed in the ventilation groove, so that the heat energy generated by the polarity end edge part of the battery cell can be rapidly dissipated in the ventilation groove to dissipate heat, and therefore, the heat energy generated by the polarity end edge part of the battery cell is not easy to concentrate together.
The beneficial effects of the invention are as follows: the conductor of the battery pack is attached to the battery cell polar end in a mode of covering the battery cell polar end in a non-wrapping mode, compared with the traditional mode of connecting the battery cell polar end in a welding mode, the heat energy blocking of the battery cell polar end by a welding layer is reduced, and therefore the battery pack is beneficial to improving the heat dissipation effect of the battery cell polar end. And when the battery pack is used for supplying power or storing electricity, the heat energy generated by the contact part of the polar end of the battery core and the conductor and the heat energy generated by the edge part (not in contact with the conductor) of the polar end of the battery core can be further dissipated in the heat dissipation port, so that the heat dissipation effect is further improved.
Drawings
Fig. 1 is an exploded view of a battery pack according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view of a lower bracket according to an embodiment of the invention.
Fig. 3 is a schematic plan view of a lower bracket according to an embodiment of the present invention.
Fig. 4 is a schematic perspective view of a connecting piece according to an embodiment of the invention.
10. The shell, 11, the installation cavity, 12 and the heat dissipation groove;
20. the battery module comprises a battery module body 21, a lower bracket 22, a lower connecting sheet 23, a lower cover plate 24, an upper bracket 25, an upper connecting sheet 26 and an upper cover plate;
211. a jogged cavity 212, a heat radiation port 213, a heat radiation platform 214 and a circulation groove;
221. a conductor, 222, a heat sink;
231. an avoidance groove;
30. a battery cell;
40. and (5) clamping the structural member.
Detailed Description
In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "a," an, "" the first, "" the second, "" the third, "" the fourth, "" the fifth, "and the sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
For purposes of brevity and description, the principles of the embodiments are described primarily by reference to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. However, it is apparent that. It will be apparent to one of ordinary skill in the art that the embodiments may be practiced without limitation to these specific details. In some instances, well-known battery pack structures have not been described in detail to avoid unnecessarily obscuring such embodiments. In addition, all embodiments may be used in combination with each other.
Examples
The drawings of the specification are taken as the content of the specification, and the structural shapes, connection relationships, coordination relationships and positional relationships which can be obtained unambiguously in the drawings of the specification are understood as the content of the specification.
A battery pack, as shown in figure 1, comprises a shell 10 and a battery module 20 arranged in a mounting cavity 11 of the shell 10, wherein at least two battery packs with opposite electrode directions are arranged in the battery module 20, namely one battery pack has an upward positive electrode, and the other battery pack has an upward negative electrode. The two battery packs are connected in series, and each battery pack comprises a plurality of battery cells 30 with the same electrode direction, namely, the battery cells 30 in each battery pack are all upward in positive electrode or upward in negative electrode.
Several cells 30 in a battery pack may be arranged in a side-by-side and/or stacked manner.
The battery module 20 includes a lower bracket 21 and a lower connecting piece 22, and an upper bracket 24 and an upper connecting piece 25.
As shown in fig. 1-3, the lower bracket 21 and the upper bracket 24 are both provided with a heat dissipation opening 212, the lower connecting piece 22 and the upper connecting piece 25 are both provided with a conductor 221, and the conductor 221 is positioned in the heat dissipation opening 212 and is contacted with the polar end of the battery cell 30 so as to realize the electrical connection between the conductor 221 and the battery cell 30. The lower connecting piece 22 and the upper connecting piece 25 respectively connect the battery cells 30 with the same electrode direction in parallel.
The polar end of the cell 30 refers to an electrode and the conductor 221 may be a copper sheet or a nickel sheet.
The conductor 221 of the battery pack is attached to the polar end of the battery cell 30 in a manner of covering the polar end of the battery cell 30 in a non-wrapping manner, and compared with the traditional manner of connecting the polar end of the battery cell 30 in a welding manner, the invention reduces the blocking of heat energy generated by a welding layer on the polar end of the battery cell 30, thus being beneficial to improving the heat dissipation effect on the polar end of the battery cell 30. When the battery pack is used for power supply or power storage, the heat energy generated at the contact part of the polar end of the battery cell 30 and the conductor 221, and the heat energy generated at the polar end edge part (the part not in contact with the conductor 221) of the battery cell 30 can be further dissipated in the heat dissipation port 212, so that the heat dissipation effect can be further improved.
As shown in fig. 4, the upper connecting piece 25 and the lower connecting piece 22 are respectively provided with a plurality of conductors 221, the upper connecting piece 25 is a conductive metal piece or the upper connecting piece 25 is provided with a circuit for connecting the conductors 221, the lower connecting piece 22 is a conductive metal piece or the lower connecting piece 22 is provided with a circuit for connecting the conductors 221, and the upper connecting piece 25 and the lower connecting piece 22 are used for electrically connecting the plurality of conductors 221 of the upper connecting piece 25.
As shown in fig. 1 and 4, the conductor 221 of the lower connecting piece 22 protrudes from the plane of the lower connecting piece 22, the conductor 221 of the upper connecting piece 25 protrudes from the plane of the upper connecting piece 25, the conductor 221 of the upper connecting piece 25 extends downward and is bent to contact the polar end of the battery cell 30 in a bent structure, and the conductor 221 of the lower connecting piece 22 extends upward and is bent to contact the polar end of the battery cell 30 in a bent structure.
The lower connecting piece 22 and the upper connecting piece 25 are provided with radiating holes 222 at positions corresponding to the conductors 221 on the lower connecting piece 22 and the upper connecting piece 25, and the radiating holes 222 are communicated with the mounting cavity 11. Specifically, the conductors 221 of both the upper and lower connection pieces 25 and 22 are provided with heat dissipation holes 222, the lower connection piece 22 corresponds to the heat dissipation holes 222 at the lower bracket 21, and the upper connection piece 25 corresponds to the heat dissipation holes 222 at the upper bracket 24. The heat dissipating holes 222 at the upper bracket 24 are not shown in the drawing, but the heat dissipating holes 222 at the upper bracket 24 have the same structure as the heat dissipating holes 222 at the lower bracket 21.
The heat energy generated by the battery cell 30 can be directly transferred to the conductor 221, and the air medium in the heat dissipation hole 222 can conduct and dissipate heat to the conductor 221, so that the heat energy is dissipated into the heat dissipation hole 222 and then dissipated into the mounting cavity 11 of the shell 10 through the heat dissipation hole 222, so that the heat energy on the polar end of the battery cell 30 is greatly diffused, the heat energy is not easy to concentrate on the polar end of the battery cell 30, and the stable use of the battery cell 30 is affected.
As shown in fig. 3 and 4, the conductor 221 is smaller than the heat dissipation port 212, a heat dissipation gap is left between the conductor 221 and the side wall of the heat dissipation port 212, the heat dissipation gap is communicated with the heat dissipation hole 222, and the heat dissipation port 212 is communicated with the mounting cavity 11 through the heat dissipation hole 222. Therefore, the heat energy generated at the polar end of the battery cell 30 can be directly dissipated in the heat dissipation port 212 through the heat dissipation gap to dissipate heat, so that the heat energy is not easily concentrated at the polar end of the battery cell 30.
As shown in fig. 1, the battery module 20 further includes an upper cover plate 26 and a lower cover plate 23, the upper cover plate 26 is fixedly connected with the upper bracket 24, and the lower cover plate 23 is fixedly connected with the lower bracket 21.
The upper cover plate 26 is attached to the upper connecting piece 25, and presses and fixes the upper connecting piece 25 to the upper bracket 24.
The lower cover plate 23 is attached to the lower connecting piece 22, and presses and fixes the lower connecting piece 22 to the lower bracket 21.
The upper bracket 24 and the lower bracket 21 are of non-conductor plate-shaped structures, the upper bracket 24 and the lower bracket 21 are provided with threaded holes, and the upper cover plate 26 is connected with the threaded holes of the upper bracket 24 by bolts penetrating through the through holes of the upper connecting sheet 25 so as to realize fixed connection. And the lower cover plate 23 is connected with the threaded hole of the lower bracket 21 by passing a bolt through the through hole of the lower connecting sheet 22 so as to realize fixed connection. The upper and lower connection pieces 25 and 22 are not in contact with the bolts to avoid electrification of the bolts.
As shown in fig. 1, the upper cover plate 26 and the lower cover plate 23 are respectively provided with an avoidance groove 231, the avoidance groove 231 of the upper cover plate 26 corresponds to the heat dissipation hole 222 of the upper bracket 24, and the heat dissipation hole 222 of the upper bracket 24 is communicated with the mounting cavity 11 of the housing 10 through the avoidance groove 231 of the upper cover plate 26.
The lower cover plate 23 avoiding groove 231 corresponds to the lower bracket 21 radiating hole 222, and the lower bracket 21 radiating hole 222 is communicated with the housing 10 mounting cavity 11 through the lower cover plate 23 avoiding groove 231. So that the heat energy generated at the polar end of the battery cell 30 can be dissipated into the mounting cavity 11 of the housing 10 through the heat dissipation opening 212 and the heat dissipation hole 222 for heat dissipation.
As shown in fig. 1, the lower cover 23 is fixed to the bottom of the mounting cavity 11 of the housing 10, a locking member 40 of a non-conductor 221 is disposed between the upper cover 26 and the housing 10, one end of the locking member 40 is locked to the housing 10, and the other end of the locking member 40 is locked to the upper cover 26 to fix the housing 10 and the battery module 20.
As shown in fig. 1, a plurality of heat dissipation grooves 12 are provided on the side wall of the housing 10 at intervals, and the heat dissipation grooves 12 communicate with the installation cavity 11. The thermal energy generated by the battery cell 30 is dissipated in the housing 10 mounting chamber 11, and the thermal energy in the housing 10 mounting chamber 11 can be dissipated through the heat dissipation groove 12.
As shown in fig. 2 and 3, the lower bracket 21 and the upper bracket 24 are respectively provided with a raised annular wall, the annular walls form a fitting cavity 211 for accommodating the polar end of the battery cell 30, the heat dissipation opening 212 is positioned in the fitting cavity 211, the side surface of the battery cell 30 is attached to the fitting cavity 211 or a gap is reserved between the side surface of the battery cell 30 and the fitting cavity 211, the gap is communicated with the space where the polar end of the battery cell 30 is positioned, and the gap is also communicated with the mounting cavity 11 of the housing 10, so that heat energy generated by the polar end of the battery cell 30 is dissipated in the mounting cavity 11 through the reserved gap between the side surface of the battery cell 30 and the fitting cavity 211 to dissipate heat, and the heat energy is prevented from being concentrated at the polar end of the battery cell 30.
As shown in fig. 2 and 3, the inner bottom surface of the fitting cavity 211 is provided with a raised heat dissipation platform 213, the heat dissipation platform 213 surrounds the heat dissipation opening 212, the polar end edge of the battery cell 30 is abutted against the heat dissipation platform 213, a ventilation groove is formed between the outer wall of the heat dissipation platform 213 and the inner wall of the fitting cavity 211, and the polar end edge of the battery cell 30 is exposed in the ventilation groove.
The polar end of the battery cell 30 is not in contact with the inner bottom surface of the embedded cavity 211 except for the portion in contact with the conductor 221, namely, the polar end edge of the battery cell 30 is not in contact with the inner bottom surface of the embedded cavity 211, and the polar end edge of the battery cell 30 is exposed in the ventilation slot, so that the thermal energy generated by the polar end edge of the battery cell 30 can be quickly dissipated in the ventilation slot to dissipate heat, and therefore, the thermal energy generated by the polar end edge of the battery cell 30 is not easy to concentrate together.
As shown in fig. 2 and 3, the side surface of the battery cell 30 and the fitting cavity 211 are communicated with the ventilation groove by a clearance. The gaps are arranged between the battery cells 30, the gaps are arranged in the installation cavity 11 of the shell 10, and the ventilation grooves can enable heat energy generated at the polar ends of the battery cells 30 to be dispersed in the installation cavity 11 through the gaps, so that the heat energy generated at the polar ends of the battery cells 30 is prevented from being too concentrated, and heat dissipation is difficult.
As shown in fig. 2 and 3, the heat sink 213 has a missing portion, which is a ventilation groove 214, and the ventilation groove communicates with the heat dissipation port 212 through the ventilation groove 214. The ventilation slot is communicated with the heat dissipation port 212, so that heat energy generated by the polarity end of the battery cell 30 and the polarity end edge of the battery cell 30 can flow in the ventilation slot and the heat dissipation port 212 (the heat dissipation space is improved, the heat energy is not easy to concentrate, the heat energy is concentrated and the stable use of the battery cell 30 is easy to influence), and the heat dissipation is carried out by flowing in the mounting cavity 11 of the shell 10 through the heat dissipation port 212, so that the heat dissipation of the polarity end of the battery cell 30 and the polarity end edge of the battery cell 30 is improved.
While the foregoing describes the illustrative embodiments of the present invention so that those skilled in the art may understand the present invention, the present invention is not limited to the specific embodiments, and all inventive innovations utilizing the inventive concepts are herein within the scope of the present invention as defined and defined by the appended claims, as long as the various changes are within the spirit and scope of the present invention.

Claims (8)

1. The battery pack is characterized by comprising a shell and a battery module arranged in an installation cavity of the shell, wherein at least two battery packs with opposite electrode directions are arranged in the battery module, the two battery packs are connected in series, and the battery packs comprise a plurality of battery cores with the same electrode directions;
the battery module comprises a lower bracket and a lower connecting sheet which are attached to each other, and an upper bracket and an upper connecting sheet which are attached to each other;
the lower bracket is positioned between the lower connecting sheet and the battery cell, and the upper bracket is positioned between the upper connecting sheet and the battery cell;
the lower support and the upper support are respectively provided with a heat dissipation opening, the lower connecting sheet and the upper connecting sheet are respectively provided with a conductor, the conductors are positioned in the heat dissipation openings and are contacted with the polar ends of the battery cells, and the lower connecting sheet and the upper connecting sheet respectively connect the battery cells with the same electrode direction in parallel;
the lower bracket and the upper bracket are respectively provided with a raised annular wall, the annular walls form an embedded cavity for accommodating the polar end of the battery cell, the heat dissipation opening is positioned in the embedded cavity, the side surface of the battery cell is attached to the embedded cavity or a gap is reserved between the side surface of the battery cell and the embedded cavity, the gap is communicated with the space where the polar end of the battery cell is positioned, and the gap is also communicated with the housing mounting cavity;
the bottom surface in the embedded cavity is provided with a raised radiating platform, the radiating platform surrounds the radiating opening, the polar end edge of the battery cell is propped against the radiating platform, a ventilation groove is formed between the outer wall of the radiating platform and the inner wall of the embedded cavity, and the polar end edge of the battery cell is exposed in the ventilation groove;
the side surface of the battery core is communicated with the embedded cavity by reserving a gap and a ventilation groove;
the heat dissipation platform is provided with a missing part, the missing part is a circulation groove, and the ventilation groove is communicated with the heat dissipation opening through the circulation groove.
2. The battery pack according to claim 1, wherein the upper connection piece and the lower connection piece are respectively provided with a plurality of conductors, the upper connection piece is a conductive metal piece or the upper connection piece is provided with a circuit for connecting the conductors, the lower connection piece is a conductive metal piece or the lower connection piece is provided with a circuit for connecting the conductors, and the upper connection piece and the lower connection piece are used for electrically connecting the plurality of conductors of the upper connection piece.
3. The battery pack according to claim 1, wherein the conductor of the lower connecting piece protrudes from the plane of the lower connecting piece, the conductor of the upper connecting piece protrudes from the plane of the upper connecting piece, heat dissipation holes are provided at the conductor positions of both the upper connecting piece and the lower connecting piece, the lower connecting piece corresponds to the heat dissipation holes at the lower bracket, the upper connecting piece corresponds to the heat dissipation holes at the upper bracket, and the heat dissipation holes communicate with the mounting cavity.
4. The battery pack of claim 3, wherein the conductor is smaller than the heat sink, a heat sink gap is left between the conductor and the side wall of the heat sink, the heat sink gap is communicated with the heat sink hole, and the heat sink hole is communicated with the mounting cavity through the heat sink hole.
5. The battery pack according to claim 3, wherein the battery module further comprises an upper cover plate and a lower cover plate, the upper cover plate is fixedly connected with the upper bracket, and the lower cover plate is fixedly connected with the lower bracket;
the upper cover plate is attached to the upper connecting sheet, and the upper connecting sheet is pressed and fixed on the upper bracket;
the lower cover plate is attached to the lower connecting piece, and the lower connecting piece is pressed and fixed on the lower support.
6. The battery pack according to claim 5, wherein the upper cover plate and the lower cover plate are each provided with an avoidance groove, the upper cover plate avoidance groove corresponds to the upper bracket heat dissipation hole, and the upper bracket heat dissipation hole is communicated with the housing installation cavity through the upper cover plate avoidance groove;
the lower cover plate avoiding groove corresponds to the lower support heat dissipation hole, and the lower support heat dissipation hole is communicated with the shell installation cavity through the lower cover plate avoiding groove.
7. The battery pack according to claim 6, wherein the lower cover plate is fixed to the bottom of the housing mounting cavity, a non-conductive clamping structure member is arranged between the upper cover plate and the housing, one end of the clamping structure member is clamped with the housing, and the other end of the clamping structure member is clamped with the upper cover plate to fix the housing and the battery module.
8. The battery pack of claim 1, wherein the housing side walls are provided with a plurality of heat sink slots in spaced relation, the heat sink slots being in communication with the mounting cavity.
CN202310201344.8A 2023-03-06 2023-03-06 Battery pack Active CN116093528B (en)

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Publication number Priority date Publication date Assignee Title
JP2008270461A (en) * 2007-04-19 2008-11-06 Matsushita Electric Ind Co Ltd Storage unit
CN204596862U (en) * 2015-05-20 2015-08-26 威睿电动汽车技术（苏州）有限公司 Lithium battery module
KR101919943B1 (en) * 2016-08-18 2018-11-21 (주)엠피에스코리아 A Cell Case Structure for cylindrical battery Cells
CN107871834B (en) * 2017-11-06 2023-07-04 立峰集团有限公司 Splicing structure of modularized lithium battery
KR102397774B1 (en) * 2017-11-14 2022-05-13 주식회사 엘지에너지솔루션 Battery module and battery pack having the same

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