CN114744338A - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
CN114744338A
CN114744338A CN202210527049.7A CN202210527049A CN114744338A CN 114744338 A CN114744338 A CN 114744338A CN 202210527049 A CN202210527049 A CN 202210527049A CN 114744338 A CN114744338 A CN 114744338A
Authority
CN
China
Prior art keywords
air outlet
battery
air
battery pack
battery module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210527049.7A
Other languages
Chinese (zh)
Inventor
吴雷
杨从梅
任宇航
卢勇
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.)
Beijing Key Power Technology Co ltd
Original Assignee
Beijing Key Power Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Key Power Technology Co ltd filed Critical Beijing Key Power Technology Co ltd
Priority to CN202210527049.7A priority Critical patent/CN114744338A/en
Publication of CN114744338A publication Critical patent/CN114744338A/en
Pending legal-status Critical Current

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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
    • H01M10/60—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
    • H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
    • 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
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • 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
    • H01M50/20—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
    • H01M50/289—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
    • 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)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a battery pack, which comprises a box body and a battery module; the battery module comprises a shell and a plurality of single batteries; an isolation structure is arranged between every two adjacent single batteries; one side of the box body in the length direction is provided with an air inlet, and the other end of the box body in the length direction is provided with an air outlet; the bottom of the box body is provided with a groove, the groove is configured into an air inlet duct communicated with the air inlet, and at least part of the bottom of the groove is configured into an inclined plane; an air outlet duct is formed at the upper part of the box body; and a branch air duct is formed between the adjacent single batteries through an isolation structure. The battery pack provided by the invention adjusts the air intake amount at different positions by arranging the inclined plane in the air intake duct, thereby realizing the consistency of the heat dissipation effect at each position.

Description

Battery pack
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a battery pack with a novel heat dissipation structure.
Background
The property of the power battery is deeply influenced by temperature factors, and the discharge efficiency is changed along with the change of the temperature, so that the performance of the electric automobile is influenced; under the high temperature condition, if not reasonable heat radiation structure, great difference will appear in the temperature everywhere in the battery package, influences the temperature uniformity of battery cell and arouses a series of follow-up problems, and wherein it is more serious that the battery overcharges and leads to thermal runaway, and then makes electric automobile catch fire, explode.
In the prior art, at least one battery module is arranged in a battery pack, and all single batteries in the battery module are sequentially arranged along the arrangement direction, so that the temperature consistency of all single batteries cannot be ensured by corresponding each single battery to a fan in consideration of cost and structure; the main air inlet duct, the branch air ducts and the main air outlet duct are usually arranged, but the distance between each single battery and the air inlet and outlet is different, and the air inlet amount of each branch air duct is different, so that the temperature difference of the battery module is large, a reasonable air duct structure is arranged to control the temperature within a reasonable range, the temperature consistency of the single batteries is improved, the batteries can exert the best performance and the best service life, and the driving safety of the electric automobile is ensured.
Therefore, in view of the above technical problems, it is urgently required by those skilled in the art to develop a battery pack having a novel heat dissipation structure.
Disclosure of Invention
The invention aims to provide a battery pack with a novel heat dissipation structure, which adjusts the air inlet volume at different positions by arranging an inclined plane in an air inlet duct so as to realize the consistency of heat dissipation effects at all positions.
In order to achieve the above purpose, the invention provides the following technical scheme:
the present invention provides a battery pack, including:
a box body, wherein the interior of the box body is hollow to form an accommodating space; and
the battery module is arranged in the accommodating space;
the battery module includes:
a housing; and
the single batteries are arranged in the shell and are sequentially arranged along the length direction of the shell;
an isolation structure is arranged between every two adjacent single batteries;
one side of the box body in the length direction is provided with an air inlet, and the other end of the box body in the length direction is provided with an air outlet;
the bottom of the box body is provided with a groove, the groove is configured into an air inlet duct communicated with the air inlet, and at least part of the bottom of the groove is configured into an inclined plane;
an air outlet duct communicated with the air outlet is formed at the upper part of the box body;
the adjacent single batteries form a branch air duct communicated with the air inlet duct and the air outlet duct through the isolation structure;
and cooling gas enters the air inlet air channel through the air inlet and sequentially flows through the air inlet air channel, the branch air channel and the air outlet air channel so as to flow out of the air outlet.
Further, a box cover is arranged on the open structure at the upper end of the box body;
the space above the battery module is configured as the air outlet duct;
the middle position of the groove, or the middle part and one end close to the air outlet are configured into an inclined plane.
Furthermore, the isolation structure is a division bar arranged between two adjacent single batteries, two division bars are arranged between two adjacent single batteries, and the two division bars are arranged on two sides of the single batteries in the length direction;
the adjacent single batteries are formed into a structure separated from each other through the division bars;
spaces between two adjacent single batteries and the division bars are configured as the branch air ducts;
the thickness of the parting strip is 0.9-2 mm of hard plastic.
Further, the isolation structure is a bracket arranged between two adjacent single batteries;
the support extends along the height direction of the single battery and is provided with a channel which is arranged along the extending direction of the support;
two adjacent single batteries and the channel form the branch channel;
the bracket includes:
a first connection portion at the top;
a second connecting portion at the bottom; and
a third connecting part connected between the first connecting part and the second connecting part and extending along the height direction of the single battery, wherein the thickness of the third connecting part is 0.9-2 mm;
the channel penetrates through the first connecting part, the second connecting part and the third connecting part;
the second connecting part is connected with the bottom of the shell, and the space between the second connecting part and the bottom of the box body is configured as the air inlet duct;
and the space between the first connecting part and the second connecting part of the bracket is used as the installation space of the single battery on the corresponding side.
Further, the first connecting portion of the bracket includes:
a main body portion abutting against an upper end of the battery cell; and
the convex parts protrude from the main body part and extend to the length direction of the single batteries and are symmetrically arranged;
the opening at the upper end of the channel is positioned between the two convex parts;
an insulating cover plate is installed on the upper portion of the battery module, and the insulating cover plate is formed into the air outlet duct through the convex portion and the battery module.
Further, the first connecting portion of the bracket includes:
a main body portion abutting against an upper end of the battery cell; and
a convex portion protruding from the main body portion and located in the middle of the main body portion;
the channel penetrates through the convex part;
an insulating cover plate is arranged at the upper part of the battery module and supported on the convex part, and a through hole communicated with the channel is formed in the insulating cover plate;
the space between the insulating cover plate and the box cover is configured as the air outlet duct.
Further, the first connecting part is a main body part;
the channel penetrates through the main body part;
the space between the battery module and the box cover is configured as the air outlet duct.
Further, the upper end of the single battery is provided with two electrodes;
the main body part is located between two electrodes to restrict the support from moving along the length of the single battery through the two electrodes, and the thickness of the main body part is not larger than the height of the electrodes.
Further, the housing includes:
the side plates are positioned at two ends of the battery module in the width direction; and
the end plates are positioned at two ends of the battery module in the length direction;
the lower end of the side plate is bent towards the inner side of the battery module to form a bent part, and the single battery is supported in the shell through the bent part;
the width of the channel is not more than the width between the two bending parts.
Further, the battery pack further includes:
BDU；
the BDU is arranged at the end plate close to one end of the air outlet;
the BDU is provided with an air guide inclined plane extending towards the air outlet in an inclined mode.
In the technical scheme, the battery pack provided by the invention has the following beneficial effects:
according to the box body of the battery pack, the air quantity distribution of the branch air channel is adjusted by arranging the at least one inclined surface on the air inlet air channel, so that the temperature difference of each single battery in the battery module is reduced, the temperature is controlled within a reasonable range, the temperature consistency of the single batteries is improved, the batteries can exert the best performance and the best service life, and the driving safety of the electric automobile is ensured.
According to the battery pack, the bottom of the battery module is a certain distance away from the bottom of the box body, so that the deformation of the box body is prevented from directly acting on the single batteries, the top of the battery module is a certain distance away from the box cover and is used for electrically connecting the space of a cable and a wire harness.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a partial cross-sectional view of a battery pack according to an embodiment of the present invention (schematic diagrams of a slope distribution form of an open structure in a first embodiment, a third embodiment, and a fourth embodiment);
fig. 2 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;
fig. 3 is a structural sectional view illustrating a battery pack according to an embodiment of the present invention, in which the battery pack has a separator;
fig. 4 is a structural sectional view of a battery pack according to an embodiment of the present invention, in which the separation structure is a bracket;
fig. 5 is a schematic structural diagram of a first slope distribution form in a second embodiment of a battery pack according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second slope distribution form in a second embodiment of a battery pack according to the present invention;
fig. 7 is an exploded view of a second embodiment of a battery pack according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a bracket in a second embodiment of a battery pack according to an embodiment of the present invention;
fig. 9 is an exploded view of a third embodiment of a battery pack according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a bracket in a third embodiment of a battery pack according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a bracket in a fourth embodiment of a battery pack according to an embodiment of the present invention.
Description of reference numerals:
1. a box body; 2. a box cover; 3. a battery module; 5. a BDU; 6. an isolation structure; 7. an insulating cover plate; 8. blocking strips;
101. an air inlet; 102. an air outlet; 103. a bevel; 104. a plane; 105. a transition bevel;
301. a single battery; 302. a side plate; 303. an end plate; 304. a bending part; 305. an electrode;
401. an air inlet duct; 402. an air outlet duct; 403. a branched air duct;
501. an air guide inclined plane;
601. a first connection portion; 602. a second connecting portion; 603. a third connecting part;
60101. a main body portion; 60102. a convex portion; 60103. a channel;
701. and (6) a via hole.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1-11;
a battery pack of this embodiment, this battery pack has:
a box body 1, wherein the interior of the box body 1 is hollow to form a containing space; and
a battery module 3 mounted in the accommodation space;
the battery module 3 includes:
a housing; and
a plurality of unit batteries 301 installed in the housing, the plurality of unit batteries 301 being sequentially arranged along a length direction of the housing;
the isolation structure 6 is arranged between the adjacent single batteries 301;
an air inlet 101 is formed in one side of the box body 1 in the length direction, and an air outlet 102 is formed in the other end of the box body 1 in the length direction;
the bottom of the box body 1 is provided with a groove which is configured as an air inlet duct 401 communicated with the air inlet 101, and at least part of the bottom of the groove is configured as a slope 103;
the upper part of the box body 1 is formed into an air outlet duct 402 communicated with the air outlet 102;
the adjacent single batteries 301 are formed into a branch air duct 403 communicated with the air inlet duct 401 and the air outlet duct 402 through the isolation structure 6;
the cooling air enters the air inlet duct 401 through the air inlet 101, and flows through the air inlet duct 401, the branch duct 403 and the air outlet duct 402 in sequence to flow out from the air outlet 102.
Specifically, this embodiment discloses a battery pack with novel heat radiation structure, it includes box 1 and battery module 3, battery module 3 includes the casing again and arranges a plurality of battery cells 301 in the casing, form branch wind channel 403 through foretell isolation structure 6 between adjacent battery cell 301, in order to guarantee that every branch wind channel 403 intake is close the same, in order to keep comparatively balanced cooling effect, in the bottom of recess, just also the bottom surface part of foretell air inlet channel 401 forms the inclined plane, can effectively adjust the intake size of the branch wind channel 403 of different positions through the inclined plane towards battery module 3 slope extension, improve cooling effect.
Preferably, the open structure at the upper end of the case 1 of the present embodiment is mounted with the case cover 2;
the space above the battery module 3 is configured as an air outlet duct 402.
The middle position of the groove, or the middle and the end near the outlet 102 are configured as an inclined plane 103.
According to the structure of different battery packs, the inclined planes 103 with different distribution conditions are arranged at the bottoms of the grooves, namely, the battery packs are partially arranged on the inclined planes 103 through the air inlet air channel 401 to adjust the air volume distribution of the branch air channels 403, the temperature difference of each single battery 301 in the battery module is reduced, the temperature is controlled within a reasonable range, the temperature consistency of the single batteries 301 is improved, the batteries can play the best performance and the best service life, and the driving safety of the electric automobile is ensured.
In the first embodiment, the first isolation structure 6 is introduced, and specifically:
the isolation structure 6 of the first embodiment is a division bar installed between two adjacent single batteries 301, two division bars are installed between two adjacent single batteries 301, and the two division bars are arranged on two sides of the single batteries 301 in the length direction;
the adjacent unit cells 301 are formed in a structure separated from each other by division bars;
the space between two adjacent single batteries 301 and the parting strip is configured as a branched air duct 403;
the thickness of the parting strip is 0.9-2 mm.
The separation structure 6 of the first embodiment adopts a division bar adhered and fixed on the large-area side surface of the single battery 301, both sides of the division bar are provided with adhering surfaces, two adjacent single batteries 301 are directly adhered and fixed together, and the division bar is used for separating the two adjacent single batteries 301, so that the above-mentioned branch air duct 403 is formed between the two single batteries 301 and the division bar. In the first embodiment, the division bar is generally made of a rigid plastic, such as PET.
Referring to fig. 1, a space between the battery module 3 and the case cover 2 of the first embodiment is configured as an air outlet duct 402, a middle position of a bottom of the groove is an inclined plane 103, and both sides close to the air inlet 101 and the air outlet 102 are planes 104, wherein both sides close to the air outlet 102 are planes 104 directly connected with the inclined plane 103 to form a structure that the inclined plane 103 is transited to the plane 104, and meanwhile, the planes 104 and 103 close to the air inlet 101 are connected through a transition inclined plane 105, and a gradient of the transition inclined plane 105 is greater than a gradient of the inclined plane 103, so that one end of the air inlet 101 is formed into a structure that the plane 104 is transited to the inclined plane 103 through the transition inclined plane 105 of the third embodiment; through the design, the air quantity of the branch air ducts 403 at different positions can be adjusted by utilizing the inclined plane 103 at the middle position of the bottom of the groove and the plane closer to the bottom of the battery module 3, the cooling effect is finally improved, and the air quantity consistency is achieved.
Preferably, the isolation structure 6 of the present application is a bracket installed between two adjacent single batteries 301;
the bracket extends along the height direction of the single battery 301, and is provided with a channel 60103 arranged along the extending direction;
two adjacent unit cells 301 and a channel 60103 form a branch channel 403;
the support includes:
a first connection 601 at the top;
a second connection portion 602 at the bottom; and
a third connecting part 603 connected between the first connecting part 601 and the second connecting part 602 and extending along the height direction of the single battery 301, wherein the thickness of the third connecting part 603 is 0.9-2 mm;
a channel 60103 penetrates the first connection portion 601, the second connection portion 602, and the third connection portion 603;
the second connecting part 602 is connected with the bottom of the housing, and the space between the second connecting part 602 and the bottom of the box body 1 is configured as the air inlet channel 401;
the space between the first connection portion 601 and the second connection portion 602 of the bracket serves as an installation space for the corresponding unit cell 301.
The first embodiment described above describes that the isolation structure 6 may be two division bars installed between two adjacent single batteries 301, and this embodiment further defines another structural form of the isolation structure 6, that is, the bracket described above, and a branched air duct 403 meeting design requirements may also be formed between the two adjacent single batteries 301, and the structure of the bracket is further explained and explained below.
In the second embodiment, the first support structure is defined in detail in the second embodiment, and specifically:
referring to fig. 5 to 8, the first connecting portion 601 of the bracket of the second embodiment includes:
a main body 60101 abutting the upper ends of the unit cells 301; and
a convex portion 60102 that protrudes from the main body portion 60101 and extends in the longitudinal direction of the unit cell 301 in a symmetrical arrangement;
an opening of an upper end of the passage 60103 is located between the two protrusions 60102;
an insulating cover plate 7 is mounted on the upper portion of the battery module 3, and an air outlet duct 402 is formed between the insulating cover plate 7 and the battery module 3 through a convex portion 60102.
The first connection portion 601 of the cradle in the second embodiment includes a main body portion 60101 and two symmetrical protruding portions 60102, wherein the first connection portion 601 entirely abuts on the upper end of the unit cell 301, specifically, at a middle position of the unit cell 301, more specifically, between the two electrodes 305 of the unit cell 301, and the position of the first connection portion 601 is limited by the two electrodes 305 and the upper surface of the unit cell 301. In the above embodiment, the channel is described as penetrating through the entire body in the height direction of the rack, and the protrusions 60102 are symmetrically disposed on both sides of the upper surface of the main body portion 60101 of the second embodiment, so that in the second embodiment, the opening at the upper end of the channel 60103 needs to be located between the two protrusions 60102 to support the insulating cover 7 at the upper end through the protrusions 60102, thereby forming the air outlet duct 402 between the insulating cover 7 and the battery module 3.
Meanwhile, in order to ensure the sealing performance of the air outlet duct 402, especially the sealing performance of the side close to the air inlet 101, the side close to the air inlet 101 needs to be provided with the blocking strip 8.
In the second embodiment, an air outlet duct 402 is formed between the insulating cover plate 7 and the battery module 3, and based on the structural characteristics, the slope distribution of the adjusting branch air duct 403 at the bottom of the groove in the second embodiment is specifically as follows;
referring to fig. 5, a first distribution mode: the middle position of the bottom of the groove begins and extends to the end of the bottom of the box body 1 close to the air outlet 102 and is designed into an inclined plane 103, the side of the bottom of the groove close to the air inlet 101 is a plane 104, and the plane 104 on the side is directly connected with the end close to the inclined plane 103 so as to form a structure which is transited from the plane 104 to the inclined plane 103. Through the design, the air quantity of the branch air ducts 403 at different positions can be adjusted by utilizing the middle position of the bottom of the groove and the inclined plane 103 formed at one end close to the air outlet, the cooling effect is finally improved, and the air quantity consistency is achieved.
Referring to fig. 6, the second distribution mode: the middle position of the bottom of the groove is an inclined plane 103, one side of the groove is close to the air inlet 101, one side of the groove close to the air outlet 102 is a plane 104, the planes 104 on the two sides are respectively connected with the two ends of the inclined plane 103, the structure that the plane 104 is transited into the inclined plane 103 and then into the plane 104 is formed, the inclined plane 103 in the middle position of the bottom of the groove and the plane closer to the bottom of the battery module 3 can be utilized through the design, the air volume of the branch air ducts 403 in different positions can be adjusted, the cooling effect is finally improved, and the air volume is consistent.
In the third embodiment, the second support structure is defined in detail in the third embodiment, specifically:
referring to fig. 1, 9 and 10, the first connecting portion 601 of the bracket of the third embodiment includes:
a main body portion 60101 that abuts the upper ends of the cells 301; and
a convex portion 60102 protruding from the main body portion 60101 and located in the middle of the main body portion 60101;
channel 60103 penetrates boss 60102;
an insulating cover plate 7 is mounted on the upper portion of the battery module 3, the insulating cover plate 7 is supported on the convex portion 60102, and a through hole 701 communicated with the channel 60103 is formed in the insulating cover plate 7;
the space between the insulating cover 7 and the case cover 2 is configured as an air outlet duct 402.
In the third embodiment, a structure of the second bracket is described, specifically, a modification of the convex portion 60102 of the first connection portion 601 is that the first connection portion 601 includes a main body portion 60101 and the convex portion 60102, but only one convex portion 60102 is located at a middle position of the main body portion 60101, and the channel 60103 needs to penetrate through the convex portion 60102, so that an opening at an upper end of the channel 60103 is located at the convex portion 60102, and at this time, the insulating cover plate 7 is covered with the above-mentioned insulating cover plate 7, and needs to be matched with the opening of the convex portion 60102, so that the insulating cover plate 7 needs to be provided with a through hole 701, so as to form a flow of the cooling fluid. The space between the insulating cover plate 7 and the case cover 2 in the third embodiment is an air outlet duct 702.
In the third embodiment, the air outlet duct 402 is formed between the insulating cover plate 7 and the case cover, and based on this structural feature, the distribution of the inclined surfaces 103 of the adjusting branch air ducts 403 at the bottom of the grooves in the third embodiment is specifically described as follows;
referring to fig. 1, the middle position of the bottom of the groove is an inclined plane 103, and the side close to the air inlet 101 and the side close to the air outlet 102 are both planes 104, wherein the side close to the air outlet 102 is both the planes 104 directly connected with the inclined plane 103, so as to form a structure that the inclined plane 103 is transited to the plane 104, meanwhile, the plane 104 close to the air inlet 101 is connected with the inclined plane 103 through a transition inclined plane 105, the gradient of the transition inclined plane 105 is greater than that of the inclined plane 103, and thus, a structure that the plane 104 is transited to the inclined plane 103 through the transition inclined plane 105 of the third embodiment is formed at one end of the air inlet 101; through the design, the air quantity of the branch air ducts 403 at different positions can be adjusted by utilizing the inclined plane 103 at the middle position of the bottom of the groove and the plane 104 closer to the bottom of the battery module 3, so that the cooling effect is finally improved, and the air quantity consistency is achieved.
In the fourth embodiment, the third support structure is defined in detail in the fourth embodiment, specifically:
referring to fig. 1 and 11, the first connecting portion 601 of the fourth embodiment is a main body portion 60101;
the passage 60103 penetrates the main body portion 60101;
the space between the battery module 3 and the case cover 2 is configured as an air outlet duct 402.
The first connecting portion 601 of the fourth embodiment does not have the protruding portion 60102 described above, but only has the main body portion 60101, and therefore does not have the insulating cover 7 described above, and in this case, the space between the battery module 3 and the case cover 2 is the air outlet duct 402.
Preferably, the upper end of the unit cell 301 of the present embodiment has two electrodes 305;
the body portion 60101 is located between the two electrodes 305 to restrict the movement of the rack along the length of the cell 301 by the two electrodes 305, and the thickness of the body portion 60101 is no greater than the height of the electrodes 305. In the case of the structure having the projection 60102, the height of the projection 60102 generally needs to be larger than the height of the electrode 305.
Preferably, the housing of the present embodiment includes:
side plates 302 positioned at both ends of the battery module 3 in the width direction; and
end plates 303 positioned at both ends of the battery module 3 in the length direction;
the lower end of the side plate 302 is bent toward the inside of the battery module 3 to form a bent portion 304, and the single cell 301 is supported in the case by the bent portion 304;
the width of the channel 60103 is no greater than the width between the two bends 304.
Between the bent portion 304 of the lower end of the side plate 302 of this embodiment and the bottom of the box body 1 is the above-mentioned groove, that is, the air inlet duct 401 of this application.
In the fourth embodiment, the space between the battery module 3 and the case cover 2 is configured as the air outlet duct 402, and based on this structural feature, the slope distribution of the adjusting branch air duct 403 at the bottom of the groove in the third embodiment is specifically described as follows;
referring to fig. 1, the middle position of the bottom of the groove is an inclined plane 103, and one side of the groove close to the air inlet 101 and one side of the groove close to the air outlet 102 are both planes 104, wherein one side of the groove close to the air outlet 102 is both a plane 104 directly connected with the inclined plane 103, so as to form a structure that the inclined plane 103 is transited to the plane 104, and meanwhile, the plane 104 and the inclined plane 103 close to the air inlet 101 are connected through a transition inclined plane 105, and the gradient of the transition inclined plane 105 is greater than that of the inclined plane 103, so that one end of the air inlet 101 is formed into a structure that the plane 104 is transited to the inclined plane 103 through the transition inclined plane 105 of the third embodiment; through the design, the air quantity of the branch air channels 403 at different positions can be adjusted by utilizing the inclined plane 103 at the middle position of the bottom of the groove and the plane closer to the bottom of the battery module 3, so that the cooling effect is finally improved, and the air quantity consistency is achieved.
Wherein, above-mentioned battery package still includes:
BDU5；
the BDU5 is arranged at the end plate 303 close to one end of the air outlet 102; the BDU5 has a wind guide slope 501 extending obliquely toward the wind outlet 102.
In order to improve the air exhaust effect and play a certain role in guiding the fluid on the air exhaust side, the air guide inclined plane 501 extending toward the air outlet 102 is designed at the BDU5 in this embodiment, so as to achieve quick air exhaust and finally improve the heat dissipation effect. And the air outlet 102 of this embodiment can be installed with a centrifugal fan as an auxiliary air outlet device to ensure the circulation of cooling fluid.
In the technical scheme, the battery pack provided by the invention has the following beneficial effects:
according to the battery pack, the air quantity distribution of the branch air channels is adjusted through the inclined plane 103 arranged on the air inlet air channel 401, the temperature difference of each single battery 301 in the battery module 3 is reduced, the temperature is controlled within a reasonable range, the temperature consistency of the single batteries 301 is improved, the batteries can exert the best performance and the best service life, and the driving safety of the electric automobile is ensured.
According to the battery pack, the bottom of the battery module 3 is a certain distance away from the bottom of the box body 1, so that the deformation of the box body 1 is prevented from directly acting on the single battery 301, the top of the battery module 3 is a certain distance away from the box cover 2 and used for electrically connecting a cable and a wiring harness space, the bottom air inlet and top air outlet mode is adopted, the groove in the bottom of the battery module 3 is set as the air inlet channel 401, the space between the top of the battery module 3 and the box cover 2 is set as the air outlet channel 402, the internal height space of the existing battery pack is fully utilized, and the space utilization rate is improved.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims (10)

1. A battery pack, characterized in that the battery pack has:
a case (1), the interior of the case (1) being formed to be a hollow accommodating space; and
a battery module (3) mounted in the accommodating space;
the battery module (3) includes:
a housing; and
a plurality of single batteries (301) mounted in the housing, the plurality of single batteries (301) being arranged in sequence along the length direction of the housing;
an isolation structure (6) is arranged between the adjacent single batteries (301);
one side of the box body (1) in the length direction is provided with an air inlet (101), and the other end of the box body (1) in the length direction is provided with an air outlet (102);
the bottom of the box body (1) is provided with a groove which is configured to be an air inlet duct (401) communicated with the air inlet (101), and at least part of the bottom of the groove is configured to be a slope (103);
an air outlet duct (402) communicated with the air outlet (102) is formed at the upper part of the box body (1);
a branch air duct (403) communicated with the air inlet duct (401) and the air outlet duct (402) is formed between the adjacent single batteries (301) through the isolation structure (6);
cooling air enters the air inlet duct (401) through the air inlet (101), and flows through the air inlet duct (401), the branch air duct (403) and the air outlet duct (402) in sequence to flow out of the air outlet (102).
2. The battery pack according to claim 1, wherein a cover (2) is mounted to an open structure of an upper end of the case (1);
the space above the battery module (3) is configured as the air outlet duct (402);
the middle position of the groove, or the middle part and one end close to the air outlet (102) are configured to be an inclined surface (103).
3. The battery pack according to claim 1, wherein the isolation structure (6) is a division bar installed between two adjacent single batteries (301), two division bars are installed between two adjacent single batteries (301), and the two division bars are arranged on two sides of the single batteries (301) in the length direction;
the adjacent single batteries (301) are formed into a structure separated from each other through the division bars;
spaces between two adjacent single batteries (301) and the division bars are configured as the branch air ducts (403);
the thickness of the parting strip is 0.9-2 mm of hard plastic.
4. The battery pack according to claim 1, wherein the isolation structure (6) is a bracket mounted between two adjacent unit cells (301);
the support extends along the height direction of the single battery (301), and is provided with a channel (60103) opened along the extending direction;
two adjacent unit cells (301) and the channel (60103) are formed into the branch channel (403);
the bracket includes:
a first connection portion (601) at the top;
a second connection portion (602) at the bottom; and
a third connection part (603) connected between the first connection part (601) and the second connection part (602) and extending in a height direction of the unit battery (301), the third connection part (603) having a thickness of 0.9 to 2 mm;
the channel (60103) penetrates through the first connecting portion (601), the second connecting portion (602) and the third connecting portion (603);
the space between the second connecting part (602) and the bottom of the box body (1) is configured as the air inlet duct (401);
the space between the first connecting part (601) and the second connecting part (602) of the bracket is used as the installation space of the single battery (301) on the corresponding side.
5. The battery pack according to claim 4, wherein the first connection portion (601) of the holder includes:
a main body section (60101) that abuts the upper end of the battery cell (301); and
a convex portion (60102) protruding from the main body portion (60101) and symmetrically arranged in the longitudinal direction of the unit cell (301);
the opening of the upper end of the channel (60103) is positioned between the two convex parts (60102);
an insulating cover plate (7) is mounted on the upper portion of the battery module (3), and the insulating cover plate (7) is formed into the air outlet duct (402) between the protruding portion (60102) and the battery module (3).
6. The battery pack according to claim 4, wherein the first connection portion (601) of the holder includes:
a main body section (60101) that abuts the upper end of the battery cell (301); and
a convex portion (60102) protruding from the main body portion (60101) and located in the middle of the main body portion (60101);
the channel (60103) penetrates through the convex portion (60102);
an insulating cover plate (7) is mounted on the upper portion of the battery module (3), the insulating cover plate (7) is supported on the protruding portion (60102), and a through hole (701) communicated with the channel (60103) is formed in the insulating cover plate (7);
the space between the insulating cover plate (7) and the box cover (2) is configured as the air outlet duct (402).
7. The battery pack according to claim 4, wherein the first connection portion (601) is a main body portion (60101);
the channel (60103) extends through the body portion (60101);
the space between the battery module (3) and the case cover (2) is configured as the air outlet duct (402).
8. The battery pack according to any one of claims 5 to 7, wherein the upper end of the unit cell (301) has two electrodes (305);
the main body part (60101) is located between the two electrodes (305) to limit the movement of the bracket along the length of the single battery (301) through the two electrodes (305), and the thickness of the main body part (60101) is not larger than the height of the electrodes (305).
9. The battery pack of claim 4, wherein the housing comprises:
side plates (302) positioned at two ends of the battery module (3) in the width direction; and
end plates (303) positioned at two ends of the battery module (3) in the length direction;
the lower end of the side plate (302) is bent toward the inner side of the battery module (3) to form a bent part (304), and the single battery (301) is supported in the housing through the bent part (304);
the width of the channel (60103) is not more than the width between the two bending parts (304).
10. The battery pack according to claim 9, further comprising:
BDU(5)；
the BDU (5) is arranged at an end plate (303) close to one end of the air outlet (102);
the BDU (5) is provided with an air guide inclined plane (501) extending towards the air outlet (102) in an inclined mode.
CN202210527049.7A 2022-05-16 2022-05-16 Battery pack Pending CN114744338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210527049.7A CN114744338A (en) 2022-05-16 2022-05-16 Battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210527049.7A CN114744338A (en) 2022-05-16 2022-05-16 Battery pack

Publications (1)

Publication Number Publication Date
CN114744338A true CN114744338A (en) 2022-07-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210527049.7A Pending CN114744338A (en) 2022-05-16 2022-05-16 Battery pack

Country Status (1)

Country Link
CN (1) CN114744338A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117317450A (en) * 2023-11-30 2023-12-29 深圳市山木新能源科技股份有限公司 High heat dissipation type solid-state battery module structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117317450A (en) * 2023-11-30 2023-12-29 深圳市山木新能源科技股份有限公司 High heat dissipation type solid-state battery module structure

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