CN116345051A - Multi-surface cooling battery module - Google Patents

Multi-surface cooling battery module Download PDF

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Publication number
CN116345051A
CN116345051A CN202310341409.9A CN202310341409A CN116345051A CN 116345051 A CN116345051 A CN 116345051A CN 202310341409 A CN202310341409 A CN 202310341409A CN 116345051 A CN116345051 A CN 116345051A
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China
Prior art keywords
heat exchange
glue
exchange plate
battery module
battery
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CN202310341409.9A
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Chinese (zh)
Inventor
徐晨光
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Svolt Energy Technology Co Ltd
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Svolt Energy Technology Co Ltd
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Priority to CN202310341409.9A priority Critical patent/CN116345051A/en
Publication of CN116345051A publication Critical patent/CN116345051A/en
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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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • 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)
  • Aviation & Aerospace Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to the technical field of batteries, in particular to a multi-surface cooling battery module. The multi-sided cooling battery module includes: the battery pack is formed by stacking a plurality of battery cells along the direction vertical to the large surface of the battery cells; at least two heat exchange plates, wherein each heat exchange plate is attached to one side surface of the battery pack, and the heat exchange plates are internally suitable for accommodating heat exchange media; the rubber blocking piece is attached between the large faces of the adjacent two electric cores, at least part of the rubber blocking piece is arranged around the circumferential edge of the large face of the electric core in a surrounding mode and is distributed close to the heat exchange plate, and the rubber blocking piece is suitable for blocking rubber from entering between the large faces of the adjacent two electric cores. According to the multi-surface cooling battery module provided by the invention, the glue blocking piece can block glue from entering between the large surfaces of two adjacent battery cells, so that the effect of preventing glue overflow is achieved, and the situation that the glue overflow presses the battery cell pole pieces to cause safety problems is avoided.

Description

Multi-surface cooling battery module
Technical Field
The invention relates to the technical field of batteries, in particular to a multi-surface cooling battery module.
Background
With the rapid development of the electric automobile market, the capacity platform of the power battery is gradually increased, so that the charging time of the power battery is shortened, the use convenience of the electric automobile is improved, and a rapid charging scheme of the power battery is developed. However, the problem of heat generation and heating of the battery caused by rapid charging is very serious, in order to improve the rapid heat dissipation performance of the power battery, a cooling plate is added to cool the battery module in a multi-surface manner in the prior art so as to improve the heat dissipation performance, and heat conduction effect is improved by coating heat conduction structural adhesive between the heat dissipation plate and the battery.
But for the battery adopting CTP scheme (CTP, namely Cell To PACK (battery-battery PACK), the battery is directly integrated into the battery PACK, so that the battery assembly scheme of a middle module framework is omitted, the structure of the PACK is simplified, the space utilization rate is improved), the battery is directly installed into the PACK through a stacking tool in order To simplify the structure, a gap can be naturally formed between the battery cores, and when a cooling plate with multi-face heat dissipation is adopted, heat conduction structural adhesive is easy To overflow into the gap of the battery core, and further, the adhesive overflow is easy To press the battery core pole pieces, so that the safety problem is caused.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the heat conduction structural adhesive is easy to overflow into the cell gap to cause potential safety hazard in the prior art, so as to provide the multi-surface cooling battery module capable of preventing the heat conduction structural adhesive from overflowing into the cell gap.
In order to solve the above technical problems, the present invention provides a multi-surface cooling battery module, comprising:
the battery pack is formed by stacking a plurality of battery cells along the direction vertical to the large surface of the battery cells;
at least two heat exchange plates, wherein each heat exchange plate is attached to one side surface of the battery pack, and the heat exchange plates are internally suitable for accommodating heat exchange media;
the rubber blocking piece is attached between the large faces of the adjacent two electric cores, at least part of the rubber blocking piece is arranged around the circumferential edge of the large face of the electric core in a surrounding mode and is distributed close to the heat exchange plate, and the rubber blocking piece is suitable for blocking rubber from entering between the large faces of the adjacent two electric cores.
Optionally, the glue blocking pieces are L-shaped, and every two glue blocking pieces are arranged in pairs and are enclosed to form a square shape;
each pair of the glue blocking pieces are positioned between the large faces of two adjacent electric cores and are enclosed together with the large faces of the electric cores to form a hollow cavity;
the glue blocking piece is suitable for blocking glue from entering the hollow cavity.
Optionally, the fender is made by elastic material, the rebound force F who keeps off glues the piece satisfies: f=σ×a, where σ is a rebound stress corresponding to a compression strain of the glue blocking member in a limit state, and a is an area of a pressed region of the glue blocking member;
and the rebound force F of the glue blocking piece meets the following conditions: f is less than or equal to F Clip Wherein F is Clip The friction force generated when the clamping tool clamps the stacked battery packs is used for clamping the stacked battery packs.
Optionally, the maximum compression rate eta of the glue blocking piece max The method meets the following conditions:
Figure BDA0004158190260000021
wherein X is the gap size of adjacent cells, L is the thickness of filler additionally arranged between adjacent cells, A is the thickness tolerance of the glue blocking piece, B is the thickness tolerance of the filler, C1 is the position tolerance of the first cell in the adjacent cells, C2 is the position tolerance of the second cell in the adjacent cells, D is the thickness tolerance of the cells, and H is the initial design thickness of the glue blocking piece.
Optionally, the minimum compression rate eta of the glue blocking piece min The method meets the following conditions:
Figure BDA0004158190260000031
optionally, the glue blocking piece comprises soft foam.
Optionally, the heat exchange plate comprises a bottom heat exchange plate positioned at the bottom of the battery pack, and a first heat exchange plate and a second heat exchange plate which are adjacent to the bottom heat exchange plate and positioned at two sides of the battery pack, wherein the first heat exchange plate and the second heat exchange plate are perpendicular to the large surface of the battery cell.
Optionally, the multi-surface cooling battery module further comprises a heat exchange tube group adapted to communicate the bottom heat exchange plate, the first heat exchange plate and the second heat exchange plate.
Optionally, the multi-sided cooling battery module further includes: and the CCS component is electrically connected with the battery cell.
Optionally, the multi-sided cooling battery module includes a non-unitized power module.
The technical scheme of the invention has the following advantages:
1. according to the multi-surface cooling battery module provided by the invention, the glue blocking piece is attached between the large surfaces of the adjacent two battery cells, so that the glue blocking piece is at least partially arranged around the circumferential edge of the large surface of the battery cell and is distributed close to the heat exchange plate, the glue blocking piece can block glue from entering between the large surfaces of the adjacent two battery cells, the glue overflow preventing effect is achieved, and the situation that the glue overflow presses the battery cell pole pieces to cause safety problems is avoided.
2. According to the multi-face cooling battery module provided by the invention, the glue blocking piece can be matched with the heat exchange plates, so that the glue blocking piece plays a role in blocking a plurality of side faces from entering into glue between large faces of two adjacent battery cores, and no glue overflow is ensured between the large faces of the two adjacent battery cores.
3. According to the multi-surface cooling battery module provided by the invention, the glue blocking parts are L-shaped, and every two glue blocking parts are arranged in pairs and are enclosed to form a square shape; thereby enclose jointly with the large tracts of land of electric core and form the cavity, two keep off gluey piece end to end guarantees that the colloid can't follow two keep off the junction gap department of gluing the piece and get into, improves and keeps off gluey effect. The L-shaped glue blocking piece is more convenient to paste, the labor cost is lower, the breakage rate is lower when the L-shaped glue blocking piece is enclosed to form a square shape, and the L-shaped paste is the most cost-effective paste method, and has higher paste efficiency and lower loss rate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view showing the overall structure of a multi-sided cooling battery module according to the present invention;
fig. 2 is a schematic view showing an exploded state of the multi-sided cooling battery module according to the present invention;
FIG. 3 is a schematic view of a glue barrier according to the present invention;
FIG. 4 is a schematic view of a heat exchange plate and a heat exchange tube according to the present invention;
fig. 5 is a schematic view of a single heat exchanger plate according to the present invention.
Reference numerals illustrate:
1-insulating film, 2-CCS assembly, 3-heat exchange plate, 31-first heat exchange plate, 32-second heat exchange plate, 33-bottom heat exchange plate, 34-hanger, 35-plate substrate, 36-spray coating, 4-battery pack, 41-electric core, 5-heat exchange tube set, 6-output pole protection piece, 7-glue blocking piece and 8-filler.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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 can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Examples
As shown in fig. 1 to 5, the multi-sided cooling battery module provided in this embodiment includes:
the battery pack 4 is formed by stacking a plurality of battery cells 41 along a large-surface direction perpendicular to the battery cells 41;
at least two heat exchange plates 3, wherein each heat exchange plate 3 is attached to one side surface of the battery pack 4, and the heat exchange plates 3 are suitable for accommodating heat exchange media;
the glue blocking piece 7 is attached between the large faces of the adjacent two electric cores 41, at least part of the glue blocking piece 7 is arranged around the circumferential edge of the large face of the electric core 41 and is distributed near the position of the heat exchange plate 3, and the glue blocking piece 7 is suitable for blocking glue from entering between the large faces of the adjacent two electric cores 41.
Optionally, the electric core 41 may be a square shell battery, the large surface body of the electric core 41 may be a long high surface of the square shell battery, multiple electric cores 41 are stacked along a direction perpendicular to the large surface of the electric core 41 to form the battery pack 4, and a glue blocking member 7 is attached between the large surfaces of two adjacent electric cores 41, so that when the heat exchange plate 3 is attached to the side surface of the battery pack 4, glue can be blocked from entering between the large surfaces of two adjacent electric cores 41 by the glue blocking member 7, and an effect of preventing glue overflow is achieved, thereby avoiding occurrence of a safety problem caused by pressing the electric core pole pieces by glue overflow.
It should be noted that, the distribution of the positions of the glue blocking members 7 near the heat exchange plate 3 means that when the glue blocking members 7 are disposed at the circumferential edge of the large surface of the electric core 41, the edge where the glue blocking members 7 are disposed is the edge on the side where the heat exchange plate 3 is disposed. For example, when the heat exchange plate 3 is disposed on the bottom surface and the left side surface of the battery pack 4, the glue blocking member 7 is disposed between the large surfaces of the adjacent two electric cores 41 and is specifically distributed on the circumferential edges of the bottom surface and the left side surface of the electric core 41, so that the positions of the glue blocking member 7 and the heat exchange plate 3 correspond to each other, and the effect of directly blocking glue is achieved.
In addition, when the battery pack 4 is clamped and installed into the box body, the glue blocking piece 7 positioned between the battery cells can play a role in buffering.
According to the multi-surface cooling battery module provided by the embodiment, the glue blocking pieces 7 are attached between the large surfaces of the adjacent two battery cells 41, so that the glue blocking pieces 7 are at least partially arranged around the circumferential edges of the large surfaces of the battery cells 41 and are close to the position distribution of the heat exchange plates 3, glue blocking pieces 7 can block glue from entering between the large surfaces of the adjacent two battery cells 41, the effect of preventing glue overflow is achieved, and the situation that the glue overflow presses the battery cell pole pieces to cause safety problems is avoided.
In addition, the glue blocking piece 7 can be matched with the heat exchange plates 3 to play a role in blocking glue between large faces of the adjacent two electric cores 41 from entering the sides, so that no glue overflow is ensured between the large faces of the adjacent two electric cores 41.
Specifically, as shown in fig. 3, the glue blocking members 7 are configured in an L shape, and each two glue blocking members 7 are arranged in pairs and enclose to form a square shape;
each pair of glue blocking pieces 7 is positioned between the large faces of two adjacent electric cores 41 and is enclosed together with the large faces of the electric cores 41 to form a hollow cavity;
the glue blocking member 7 is adapted to block glue from entering the hollow cavity.
Every two keep off gluey piece 7 sets up in pairs and encloses and close and form a mouthful style of calligraphy, thereby enclose jointly with the large face of electric core 41 and close and form the cavity, two keep off gluey piece 7 end to end guarantees that the colloid can't follow two keep off the joint gap department of gluey piece 7 gets into, improves and keeps off gluey effect.
The L-shaped glue blocking piece 7 adopted in the embodiment is more convenient to paste, the labor cost is lower, the breakage rate is lower when the L-shaped glue blocking piece 7 is enclosed to form a square shape, and the L-shaped paste is the most cost-effective paste method, and has higher paste efficiency and lower loss rate.
The L-shaped glue blocking piece 7 adopted in the embodiment can achieve a better glue blocking effect compared with a return frame glue blocking mode or a glue blocking-free mode. The adhesive blocking mode of the back frame may cause excessive stress of the electrode plate of the battery cell in an EOL stage (EOL is functional detection before the off-line of an automobile electronic product) of the battery cell, so that the battery cell is subjected to lithium precipitation and other problems; and the glue blocking mode is not adopted, glue overflow between the battery cells is easy to occur, and the glue overflow presses the battery cell pole pieces to cause safety problems.
Specifically, the glue blocking piece 7 is made of elastic materials, and the rebound force F of the glue blocking piece 7 satisfies: f=σ×a, where σ is a rebound stress corresponding to the compression strain of the glue blocking member 7 in the limit state, and a is an area of the pressed region of the glue blocking member 7;
and the rebound force F of the glue blocking piece 7 meets the following conditions: f is less than or equal to F Clip Wherein F is Clip The battery pack in a clamping stacking state for the clamping tool4 friction force generated at the time of the operation.
The rebound force F of the glue blocking piece 7 is smaller than or equal to the friction force generated when the clamping tool clamps the stacked battery packs 4, so that the battery packs 4 can be clamped smoothly, and the battery packs 4 can be installed into the box conveniently.
Alternatively, the compression amount of the limit state of the glue blocking member 7 may be determined according to the thickness tolerance of the glue blocking member 7, the cell gap tolerance, the thickness tolerance of the filler between cells, etc., as follows.
Specifically, the maximum compression rate η of the glue barrier 7 max The method meets the following conditions:
Figure BDA0004158190260000081
wherein X is the gap size between adjacent cells 41, L is the thickness of the filler 8 additionally arranged between adjacent cells 41, a is the thickness tolerance of the glue blocking member 7, B is the thickness tolerance of the filler 8, C1 is the position tolerance of the first cell 41 between adjacent cells 41, C2 is the position tolerance of the second cell 41 between adjacent cells 41, D is the thickness tolerance of the cell 41, and H is the initial design thickness of the glue blocking member 7.
The positional tolerance refers to the total amount of variation allowed by the direction or position of the relevant actual element with respect to the reference. In this embodiment, C1 is a tolerance of the position degree of the first one of the adjacent cells, that is, represents a deviation degree between the first one of the cells and its reference placement position; c2 is a positional tolerance of a second one of the adjacent cells, that is, a deviation between the second one of the cells and its reference placement position.
As a specific implementation form, the range of the gap size X between adjacent cells 41 may be 4mm less than or equal to X less than or equal to 5mm, and may specifically be selected from: 4.1mm or 4.3mm or 4.5mm or 4.7mm, x=4.3 mm is preferably used in this embodiment.
The range of the thickness L of the filler 8 additionally arranged between the adjacent cells 41 may be 2.5mm or less and L or less than or equal to 3.5mm, and may be specifically selected: 2.8mm or 3.1mm or 3.3mm or 3.5mm, l=3.1 mm is preferably used in this embodiment.
The thickness tolerance a of the glue blocking member 7 may be: + -0.1 mm
The thickness tolerance B of the filler 8 may be: + -0.2 mm;
the tolerance C1 of the position degree of the first one of the adjacent cells 41 may be: + -0.2 mm;
the tolerance C2 of the position degree of the second cell 41 among the adjacent cells 41 may be:
±0.2mm；
the thickness tolerance D of the cell 41 may be: + -0.3 mm;
the range of the value of the initial design thickness H of the glue blocking piece 7 can be 2mm or more and 3mm or less, and the range can be specifically selected: 2.2mm or 2.4mm or 2.6mm or 2.8mm, h=2.4 mm being preferably used in this embodiment.
Specifically, the minimum compression rate η of the glue barrier 7 min The method meets the following conditions:
Figure BDA0004158190260000101
additionally, in the initial design stage, the initial design thickness of the glue blocking member 7 may be determined by considering the maximum compression rate and the minimum compression rate after the material of the glue blocking member 7 is determined, and selecting the rebound stress of the glue blocking member. The maximum rebound stress is smaller than the friction force of the equipment to the side surface of the battery cell, and the minimum rebound stress meets the extrusion force of glue to the glue blocking piece, so that the glue blocking piece does not spring open; for example, the rebound stress of the glue blocking member in this embodiment should be as follows: the sigma is more than or equal to 10Kpa@10%, sigma is less than or equal to 150Kpa@90%, namely, the rebound stress of the glue blocking piece is more than or equal to 10Kpa under the condition of 10% compression rate, and the rebound stress of the glue blocking piece is less than or equal to 150Kpa under the condition of 90% compression rate, so that the initial design thickness of the glue blocking piece 7 is reversely obtained according to the maximum compression rate and the minimum compression rate.
Additionally, the rebound stress of the glue blocking piece can be confirmed according to the compression rate, and the rebound force of the glue blocking piece can be confirmed according to the rebound stress.
Specifically, the glue blocking member 7 comprises soft foam. And specifically, the glue blocking piece 7 can be made of foam with low resilience.
As a variant, the material of the glue blocking member 7 may be replaced by other foam having a high compression rate and a low resilience, such as melamine foam, high-elastic PU foam, and silicon foam.
Optionally, the material of the filler 8 may be replaced by a thermal insulation material such as a ceramic aerogel blanket, a glass fiber aerogel blanket, a pre-oxidized fiber aerogel blanket, etc.
Specifically, as shown in fig. 2 and 4, the heat exchange plate 3 includes a bottom heat exchange plate 33 located at the bottom of the battery pack 4, and a first heat exchange plate 31 and a second heat exchange plate 32 adjacent to the bottom heat exchange plate 33 and located at two sides of the battery pack 4, where the first heat exchange plate 31 and the second heat exchange plate 32 are perpendicular to the large surface of the battery cell 41.
Optionally, the number of the heat exchange plates 3 may be three, so as to be attached to three sides of the battery pack 4, thereby ensuring the cooling effect of the battery pack 4. Compared with the mode that only water cooling plates are adhered to the bottom of the battery cell to realize heat dissipation, the power battery is difficult to effectively dissipate heat in the charging and discharging process, and the water cooling plates are adhered to the bottom surface and the two side surfaces of the battery cell respectively in a three-surface heat dissipation mode, so that the heat can be rapidly dissipated in the charging and discharging process of the battery cell.
Specifically, the multi-sided cooling battery module further includes a heat exchange tube group 5 adapted to communicate the bottom heat exchange plate 33, the first heat exchange plate 31, and the second heat exchange plate 32.
As shown in fig. 2 and fig. 4, the first heat exchange plate 31 is glued to the left side of the battery pack 4 through a heat conducting structure; the second heat exchange plate 32 is glued and adhered to the right side surface of the battery pack 4 through a heat conducting structure; the first heat exchange plate 31 and the second heat exchange plate 32 are connected through the heat exchange tube group 5, so that a cooling loop is formed on the side face, and specifically, the heat exchange tube group 5 comprises a liquid inlet positioned below and a liquid outlet positioned above, and the flow rate is reduced, so that the battery cell has more sufficient heat dissipation time; the bottom heat exchange plate 33 is glued to the bottom of the battery pack 4 by a heat conducting structure. The liquid inlet and outlet of the bottom heat exchange plate 33 and the side water cooling plate are respectively connected with a water pump.
Optionally, the plate substrate 35 of the heat exchange plate 3 is in a section structure, two cavities are formed inside each heat exchange plate 3, and the two cavities are communicated, so that overcurrent heat dissipation is realized. The outer surface of the plate substrate 35 is formed with a spray coating 36, and the spray coating 36 can play a role in heat conduction, insulation and corrosion prevention. One end of the plate substrate 35 is provided with a hanging lug 34, and the hanging lug 34 is suitable for fixedly mounting the heat exchange plate 3.
Specifically, the multi-sided cooling battery module further includes: CCS assembly 2, the CCS assembly 2 is electrically connected with the electrical core 41. The CCS component 2 consists of an upper insulating film, a lower insulating film, a bus bar, a temperature-sensing bracket, a flexible circuit board, heat-conducting foam, temperature sensing and the like. Alternatively, the CCS assembly may be replaced with other solutions, such as a blister solution, an injection molding solution, and a hot pressing solution; the flexible circuit board may be replaced with other schemes such as FPC, FDC, FFC, etc. Optionally, the aluminum bar in the CCS assembly 2 is welded to the battery cell 41 of the battery pack, so as to implement conductive connection.
Additionally, the CCS component 2 is adhered with an insulating film 1, where the insulating film 1 can play a role of insulation protection, and the materials may include ceramic fiber pads, PC boards, upper covers, and other materials or structures.
Additionally, the multi-sided cooling battery module further includes: the output electrode protection piece 6 is fixed on the end plate or the side beam of the box body, and plays a role in covering and protecting the output electrode.
Specifically, the multi-sided cooling battery module includes a non-unitized power module. Compared with the mode that the module adopts rolling belt and end plate to fix, there is not group power module and directly installs the battery cell in the PACK through piling up frock, and the cost is cheaper. The consistency of the module can be better ensured.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims (10)

1. A multi-sided cooling battery module, comprising:
the battery pack is formed by stacking a plurality of battery cells along the direction vertical to the large surface of the battery cells;
at least two heat exchange plates, wherein each heat exchange plate is attached to one side surface of the battery pack, and the heat exchange plates are internally suitable for accommodating heat exchange media;
the rubber blocking piece is attached between the large faces of the adjacent two electric cores, at least part of the rubber blocking piece is arranged around the circumferential edge of the large face of the electric core in a surrounding mode and is distributed close to the heat exchange plate, and the rubber blocking piece is suitable for blocking rubber from entering between the large faces of the adjacent two electric cores.
2. The multi-sided cooling battery module according to claim 1, wherein the glue blocking members are configured in an L shape, and each two glue blocking members are arranged in pairs and enclose to form a square shape;
each pair of the glue blocking pieces are positioned between the large faces of two adjacent electric cores and are enclosed together with the large faces of the electric cores to form a hollow cavity;
the glue blocking piece is suitable for blocking glue from entering the hollow cavity.
3. The multi-sided cooling battery module of claim 1, wherein the blocking member is made of an elastic material, and the rebound force F of the blocking member satisfies: f=σ×a, where σ is a rebound stress corresponding to a compression strain of the glue blocking member in a limit state, and a is an area of a pressed region of the glue blocking member;
and the rebound force F of the glue blocking piece meets the following conditions: f is less than or equal to F Clip Wherein F is Clip The friction force generated when the clamping tool clamps the stacked battery packs is used for clamping the stacked battery packs.
4. The multi-sided cooling battery module of claim 3, wherein the glue barrier has a maximum compression rate η max The method meets the following conditions:
Figure FDA0004158190250000011
wherein X is the gap size of adjacent cells, L is the thickness of filler additionally arranged between adjacent cells, A is the thickness tolerance of the glue blocking piece, B is the thickness tolerance of the filler, C1 is the position tolerance of the first cell in the adjacent cells, C2 is the position tolerance of the second cell in the adjacent cells, D is the thickness tolerance of the cells, and H is the initial design thickness of the glue blocking piece.
5. The multi-sided cooling battery module of claim 4, wherein the glue barrier has a minimum compression rate η min The method meets the following conditions:
Figure FDA0004158190250000021
6. the multi-sided cooling battery module of any one of claims 1-5, wherein the glue barrier comprises soft foam.
7. The multi-sided cooling battery module of any one of claims 1-5, wherein the heat exchange plates comprise a bottom heat exchange plate positioned at the bottom of the battery pack, and a first heat exchange plate and a second heat exchange plate adjacent to the bottom heat exchange plate and positioned at both sides of the battery pack, wherein the first heat exchange plate and the second heat exchange plate are perpendicular to the large surface of the battery cell.
8. The multi-sided cooling battery module of claim 7, further comprising a heat exchange tube stack adapted to communicate with the bottom heat exchange plate, the first heat exchange plate, and the second heat exchange plate.
9. The multi-sided cooling battery module of any one of claims 1-5, further comprising: and the CCS component is electrically connected with the battery cell.
10. The multi-sided cooling battery module of claim 1, wherein the multi-sided cooling battery module comprises a no-pack power module.
CN202310341409.9A 2023-03-31 2023-03-31 Multi-surface cooling battery module Pending CN116345051A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117147344A (en) * 2023-10-31 2023-12-01 宁德时代新能源科技股份有限公司 Fatigue test equipment for heat exchange plate of battery pack

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117147344A (en) * 2023-10-31 2023-12-01 宁德时代新能源科技股份有限公司 Fatigue test equipment for heat exchange plate of battery pack
CN117147344B (en) * 2023-10-31 2024-03-29 宁德时代新能源科技股份有限公司 Fatigue test equipment for heat exchange plate of battery pack

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