CN112467245A - Power battery cooling module and thermal runaway processing method - Google Patents

Power battery cooling module and thermal runaway processing method Download PDF

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Publication number
CN112467245A
CN112467245A CN202011342168.2A CN202011342168A CN112467245A CN 112467245 A CN112467245 A CN 112467245A CN 202011342168 A CN202011342168 A CN 202011342168A CN 112467245 A CN112467245 A CN 112467245A
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CN
China
Prior art keywords
battery
cooling module
shell
installation cavity
exhaust
Prior art date
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Pending
Application number
CN202011342168.2A
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Chinese (zh)
Inventor
耿宇明
孙焕丽
孙士杰
卢军
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FAW Group Corp
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FAW Group Corp
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Publication date
Application filed by FAW Group Corp filed Critical FAW Group Corp
Priority to CN202011342168.2A priority Critical patent/CN112467245A/en
Publication of CN112467245A publication Critical patent/CN112467245A/en
Priority to PCT/CN2021/132971 priority patent/WO2022111552A1/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
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • 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
    • H01M10/655—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
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the 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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a power battery cooling module and a thermal runaway processing method. An installation cavity is formed in the shell, and an air source communicated with the installation cavity is arranged on the top wall of the shell. Support piece establishes in the installation cavity, and support piece is a plurality of, and a plurality of support piece are equipped with a support piece respectively on two inner walls of the relative setting of casing along the length direction interval distribution of casing. The battery is a plurality of, is formed with first wind channel between the lateral wall of battery and the support piece, is formed with the second wind channel between the inner wall of casing and the tip of battery, and electric core utmost point ear is arranged in the second wind channel. The exhaust assembly is arranged on the bottom wall of the shell and communicated with the mounting cavity, the exhaust assembly is used for communicating the mounting cavity with the space inside the vehicle and the space outside the vehicle, and the communication area of the exhaust assembly with the space inside the vehicle and the space outside the vehicle is adjustable. This power battery cooling module can improve the cooling effect of battery, can handle the thermal runaway phenomenon betterly.

Description

Power battery cooling module and thermal runaway processing method
Technical Field
The invention relates to the technical field of power batteries, in particular to a power battery cooling module and a thermal runaway processing method.
Background
In a cooling system using air as a cooling medium, it is generally necessary to increase the contact area between the air and a structure to be cooled as much as possible to increase the cooling area and improve the cooling effect. In a cooling system of a battery module, battery tabs on a battery are generally connected with positive and negative electrodes in a battery winding process, so that the cooling effect of the battery and the battery tabs should be ensured as much as possible in the cooling process of the battery. In addition, when the thermal runaway phenomenon appears in the battery module, the battery releases a large amount of smoke harmful to human bodies and needs to be discharged out of the vehicle in time. Battery cooling scheme sets up battery holder in the module usually among the prior art, installation laminate polymer battery in battery holder, and it realizes the cooling to a plurality of batteries to form the heat dissipation wind channel again, and its heat dissipation wind channel's cooling effect is relatively poor, and also is difficult to in time with harmful gas exhaust when the thermal runaway phenomenon appears.
Disclosure of Invention
The invention aims to provide a power battery cooling module which can improve the cooling effect of a battery and better handle the thermal runaway phenomenon.
Another object of the present invention is to provide a thermal runaway processing method, which can increase the cooling rate of a battery when a thermal runaway phenomenon occurs and ensure that thermal runaway gas inside a module does not leak into a vehicle interior space.
In order to achieve the technical effects, the technical scheme of the power battery cooling module and the thermal runaway treatment method is as follows:
a power battery cooling module includes: the air source is communicated with the mounting cavity; the supporting pieces are arranged in the installation cavity, the supporting pieces are distributed at intervals along the length direction of the shell, one supporting piece is arranged on each of two opposite inner walls of the shell, and a gap is formed between each of two ends of each supporting piece and the inner wall of the shell; the battery comprises a plurality of batteries, wherein a battery core tab of each battery is connected with the inner wall of the shell, the battery is arranged between two adjacent supporting pieces, a first air channel is formed between the side wall of the battery and the supporting pieces, a second air channel is formed between the inner wall of the shell and the end part of the battery, and the battery core tabs are positioned in the second air channels; the exhaust assembly is arranged on the bottom wall of the shell and communicated with the mounting cavity, the exhaust assembly is used for communicating the mounting cavity with the space inside the vehicle and the space outside the vehicle, and the communication area of the exhaust assembly with the space inside the vehicle and the space outside the vehicle is adjustable.
Furthermore, a plurality of batteries divide into two sets of group battery, every group battery include a plurality of edges the battery that the length direction interval of casing set up, two sets of group battery is in the interval sets up in the width direction of casing, two sets of group battery the electric core utmost point ear respectively with two inner wall connections of the relative setting of casing.
Further, the power battery cooling module further comprises a heat insulation piece, one end of each group of battery pack is abutted to the side wall of the heat insulation piece, the other end of each group of battery pack is provided with the battery cell tabs, and the battery cell tabs of the two groups of battery packs are respectively connected with the two inner walls of the shell, which are oppositely arranged.
Further, the plurality of supporting pieces are divided into two groups of supporting pieces, each group of supporting pieces comprises a plurality of supporting pieces distributed at intervals along the length direction of the shell, one end of each group of supporting pieces abuts against two side walls of the heat insulation piece, and a gap is formed between the other end of each group of supporting pieces and two independent side walls of the shell, which are arranged oppositely.
Further, the casing includes two end plates, two curb plates and a plurality of busbar, two be equipped with a plurality of mounting holes on the curb plate, every busbar with one the electric core utmost point ear of battery is connected, every the busbar inlays to be established in one in the mounting hole.
Further, the side plates are made of heat-resistant and impact-resistant materials.
Further, the projection of the support on the bottom wall of the housing is S-shaped.
Further, the exhaust assembly includes: one end of the communicating pipe is communicated with the mounting cavity; one end of the first exhaust pipe is communicated with the other end of the communicating pipe, and the other end of the first exhaust pipe is communicated with the space in the vehicle; one end of the second exhaust pipe is communicated with the other end of the communicating pipe, and the other end of the second exhaust pipe is communicated with the space outside the vehicle; the adjusting piece is arranged at the communication position of the communication pipe and the first exhaust pipe and used for adjusting the communication area between the communication pipe and the first exhaust pipe and between the second exhaust pipes.
Further, the adjusting member includes: the driving piece is arranged on the outer wall of the communicating pipe and/or the outer wall of the first exhaust pipe; the valve plate is rotationally arranged at the communication position of the communication pipe and the first exhaust pipe, and the valve plate is connected with the output end of the driving piece.
A thermal runaway processing method adopts the power battery cooling module, and comprises the following steps: s1, monitoring that a thermal runaway phenomenon occurs in the shell by the controller; s2, the controller increases the air inlet amount and the air inlet speed of the air source towards the installation cavity; s3, the exhaust assembly closes the channel between the installation cavity and the space inside the vehicle and adjusts the communication area between the installation cavity and the space outside the vehicle to the maximum.
The invention has the following beneficial effects: according to the power battery cooling module, the supporting piece can form a plurality of first air channels and second air channels in the mounting cavity, cooling air input into the mounting cavity from the air source can achieve a good cooling effect on the side wall, the end part and the battery cell lug when the cooling air circulates in the first air channels and the second air channels, meanwhile, the cooling air can be discharged into the space inside the vehicle and the space outside the vehicle from the exhaust assembly, the stability of the atmospheric pressure inside the vehicle cabin can be ensured, and harmful gas can be conveniently discharged into the space outside the vehicle when the thermal runaway phenomenon of the battery occurs, so that the safety of users is well ensured.
The invention has the following beneficial effects: according to the thermal runaway processing method, due to the power battery cooling module, the controller can judge whether the thermal runaway phenomenon occurs according to the temperature of the battery, and then the cooling air in the installation cavity is exhausted from the first exhaust pipe and the second exhaust pipe according to the actual condition in the battery, so that the rapid cooling of the generated thermal runaway battery and the reliable guarantee of the safety of a user are ensured.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a power battery cooling module provided in an embodiment of the present invention with an exhaust assembly removed;
fig. 2 is a schematic top view of a power battery cooling module according to an embodiment of the present invention;
FIG. 3 is an enlarged partial schematic view of FIG. 2 at A;
fig. 4 is a schematic structural diagram of an exhaust assembly according to an embodiment of the present invention.
Reference numerals
1. A housing; 11. an end plate; 12. a side plate; 13. a bus bar;
2. a support member; 3. a battery; 31. a battery core tab; 4. a first air duct; 5. a second air duct;
6. an exhaust assembly; 61. a communicating pipe; 62. a first exhaust pipe; 63. a second exhaust pipe; 64. an adjustment member; 641. a drive member; 642. a valve plate; 7. a heat shield.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The specific structure of the power battery cooling module according to the embodiment of the invention is described below with reference to fig. 1 to 4.
As shown in fig. 1-4, fig. 1 discloses a power battery cooling module, which comprises a housing 1, a support 2, a battery 3 and an exhaust assembly 6. A mounting cavity is formed in the shell 1, and an air source communicated with the mounting cavity is arranged on the top wall of the shell 1. Support piece 2 establishes in the installation cavity, and support piece 2 is a plurality of, and a plurality of support piece 2 are equipped with a support piece 2 respectively on two inner walls of casing 1's relative setting along casing 1's length direction interval distribution, have the clearance between support piece 2's both ends and casing 1's the inner wall. The batteries 3 are multiple, the battery core tab 31 of each battery 3 is connected with the inner wall of the shell 1, the battery 3 is arranged between two adjacent support pieces 2, a first air duct 4 is formed between the side wall of the battery 3 and the support pieces 2, a second air duct 5 is formed between the inner wall of the shell 1 and the end part of the battery 3, and the battery core tab 31 is positioned in the second air duct 5. Exhaust assembly 6 establishes on the diapire of casing 1 and with the installation cavity intercommunication, exhaust assembly 6 is used for intercommunication installation cavity and car inner space and the outer space of car, and exhaust assembly 6 is adjustable with the communicating area in car inner space and the outer space of car.
It can be understood that, the support member 2 can play a supporting role in stably installing the plurality of batteries 3 in the housing 1, a first air duct 4 can be formed between the side walls of the support member 2 and the batteries 3, and meanwhile, because a gap is formed between the side walls of the support member 2 and the housing 1, a second air duct 5 can be formed between the plurality of support members 2 and the inner wall of the housing 1, after the batteries 3 are installed in the housing 1, the plurality of support members 2 and the plurality of batteries 3 can divide the installation cavity into the plurality of first air ducts 4 and the plurality of second air ducts 5, and the battery core tabs 31 of the batteries 3 are located in the second air duct 5 between the support members 2 and the inner wall of the housing 1. When an air source communicated with the shell 1 inputs cooling air towards the installation cavity, the cooling air circulates in the vertical direction and respectively enters the exhaust assembly 6 through the first air channels 4 and the second air channels 5, the cooling air can simultaneously play a cooling effect on the side walls of the batteries 3 on the two sides of the first air channels 4 and the supporting piece 2 when circulating in the first air channels 4, the cooling air can play a cooling effect on the two side walls of all the batteries 3 when circulating in the first air channels 4, and the cooling effect of the batteries 3 in the use process of the power battery cooling module is ensured; when the cooling air circulates in the second air duct 5, the cooling effect can be achieved on the end face of the battery 3 and the side wall of the shell 1, and the effective cooling effect can be achieved on the battery core lug 31 on the end face of the battery 3, so that the temperature of the battery core lug 31 during the working of the battery 3 is effectively reduced, and the temperature of the battery 3 during the working is ensured to be within a normal range. The forced heat dissipation of battery 3's electric core utmost point ear 31 and side can be realized betterly to a plurality of batteries 3's forced heat dissipation effect through the cooling air of air supply, not only has better radiating effect, can also make battery 3's temperature distribution more even, has effectively reduced the possibility that thermal runaway phenomenon appears in power battery cooling module. In addition, because the air source usually extracts air from the vehicle cabin, and the exhaust component 6 can discharge the cooling air after heat dissipation into the vehicle cabin again, the phenomenon of pressure reduction in the vehicle cabin after air extraction for the air source can be eliminated, thereby ensuring that the change of the atmospheric pressure in the vehicle cabin is small in the working process of the power battery cooling module, not only ensuring the sensory experience of passengers, but also well completing the whole air-cooled heat dissipation circulation, meanwhile, the exhaust component 6 can also discharge the cooling air to the space outside the vehicle, when the thermal runaway phenomenon occurs in the power battery cooling module, as the pressure in the battery 3 is overlarge and the pressure relief valve of the battery core is opened, the harmful gas in the battery core enters the installation cavity from the battery 3, at the moment, the exhaust component 6 can seal the communication part between the exhaust component and the space inside the vehicle and discharge the harmful gas and the cooling air outside the vehicle, can guarantee better that harmful gas can not influence the passenger, can also discharge thermal runaway's heat to the space outside the car comparatively rapidly, can accomplish better thermal runaway emergency treatment.
According to the power battery cooling module of this embodiment, support piece 2 can form a plurality of first wind channels 4 and second wind channels 5 in the installation cavity, the lateral wall to battery 3 when the cooling air from air supply input installation cavity can circulate in first wind channel 4 and second wind channel 5, tip and electric core utmost point ear 31 play better cooling effect, cooling air can be followed exhaust subassembly 6 discharges to car inner space and car outer space simultaneously, can ensure the stability of the atmospheric pressure in the car cabin, also can be convenient for arrange harmful gas to the car outer space when the thermal runaway phenomenon appears in battery 3, thereby user's safety has been guaranteed betterly.
In some embodiments, as shown in fig. 1 and 2, the plurality of batteries 3 are divided into two groups of battery packs, each group of battery packs includes a plurality of batteries 3 arranged at intervals along the length direction of the casing 1, the two groups of battery packs are arranged at intervals along the width direction of the casing 1, and the cell tabs 31 of the two groups of battery packs are respectively connected with two oppositely arranged inner walls of the casing 1.
It can be understood that, through the above structure setting, not only can be convenient for install a plurality of batteries 3 in casing 1, also can get the electricity from a plurality of batteries 3 simultaneously, can enough improve the output of power battery cooling module, can also ensure the radiating effect of two group batteries through the setting in first wind channel 4 and second wind channel 5.
In some embodiments, as shown in fig. 1 to fig. 3, the power battery cooling module further includes a heat insulating member 7, one end of each group of battery packs abuts against a sidewall of the heat insulating member 7, and a battery tab 31 is disposed on the other end of each group of battery packs, and the battery tabs 31 of the two groups of battery packs are respectively connected with two oppositely disposed inner walls of the casing 1.
It can be understood that the heat insulation piece 7 can not only play a heat insulation role for the plurality of batteries 3 of the two groups of battery packs, but also play a buffering role and an electric insulation role so as to ensure the use reliability of the power battery cooling module.
Specifically, the heat insulating member 7 is of an elastic structure, the thickness of the heat insulating member 7 is 1mm-5mm, and the heat insulating member 7 can be made of materials with good heat insulating, buffering and insulating effects, such as EPDM foam or silicon foam.
In some embodiments, as shown in fig. 2 and 3, the plurality of supporting members 2 are divided into two groups of supporting members, each group of supporting members includes a plurality of supporting members 2 spaced apart along the length direction of the housing 1, one end of each group of supporting members abuts against two sidewalls of the heat insulating member 7, and the other end of each group of supporting members has a gap with two sidewalls of the housing 1 which are disposed opposite to each other.
It will be appreciated that the arrangement of the two sets of support sets is well suited to the power battery cooling module with the thermal insulation 7, so as to ensure the reliable arrangement of the plurality of first air ducts 4 in the installation cavity,
in some embodiments, as shown in fig. 1 and 2, the casing 1 includes two end plates 11, two side plates 12, and a plurality of bus bars 13, a plurality of mounting holes are provided on the two side plates 12, each bus bar 13 is connected to a cell tab 31 of one battery 3, and each bus bar 13 is embedded in one mounting hole.
It can be understood that the end plate 11 and the side plate 12 can form a safe and reliable casing 1, the bus bar 13 can be connected with the cell tabs 31 so as to be convenient for taking electricity from a plurality of batteries 3, after the bus bar 13 is connected with the cell tabs 31, the bus bar 13 can be matched with the side plate 12 when the batteries 3 are installed in the installation cavity, and the bus bar 13 can be stably connected with the side plate 12 under the limit of the batteries 3.
Specifically, the battery core tabs 31 are welded to the bus bar, and the end plates 11 and the side plates 12 are bonded or connected through a clamping structure and a connection structure such as a screw or a bolt to achieve stable connection.
In some specific embodiments, the cover plate can be made of mica, and the cover plate has a thickness of 2mm to 8 mm.
In some embodiments, the side panels 12 are fabricated from a heat and impact resistant material.
It can be understood that, through the above-mentioned structural arrangement, when the thermal runaway phenomenon appears in battery 3, side plate 12 can bear the impact of the high-temperature high-pressure gas leaked from inside of battery 3 when the thermal runaway, ensure the stability of casing 1, effectively reduce the risk that the thermal runaway caused.
In some embodiments, as shown in fig. 3, the projection of the support 2 on the bottom wall of the housing 1 is S-shaped.
It can be understood that, through the above-mentioned structural arrangement, the support 2 can be enabled to have a better support effect on the battery 3, the cross-sectional area of the first air duct 4 can be increased, the flow of the cooling air circulating in the first air duct 4 is increased, the contact area between the cooling air and the side surface of the battery 3 is increased to the maximum, and the cooling effect of the cooling air on the battery 3 is increased.
Of course, in other embodiments of the present invention, the projection of the supporting member 2 on the bottom wall of the casing 1 can also be formed as a plurality of protrusions and grooves distributed at intervals, or as a plurality of triangular structures connected in sequence, and the specific structure of the supporting member 2 can be determined according to actual requirements as long as the flow rate of the cooling air in the first air duct 4 can be increased.
In some embodiments, the thickness of the support member 2 is 0.2mm to 1mm, and the support member 2 can be made of PP/PE-TD 40.
In some embodiments, as shown in fig. 4, the exhaust assembly 6 includes a communication pipe 61, a first exhaust pipe 62, a second exhaust pipe 63, and a regulator 64. One end of the communication pipe 61 communicates with the mounting chamber. One end of the first exhaust pipe 62 communicates with the other end of the communication pipe 61, and the other end communicates with the vehicle interior space. One end of the second exhaust pipe 63 communicates with the other end of the communication pipe 61, and the other end communicates with the vehicle exterior space. The adjuster 64 is provided at a communication portion of the communication pipe 61 and the first exhaust pipe 62, and the adjuster 64 is used to adjust a communication area between the communication pipe 61 and the first and second exhaust pipes 62 and 63.
It can be understood that, through the structural arrangement of the communicating pipe 61, the first exhaust pipe 62, the second exhaust pipe 63 and the adjusting piece 64, the exhaust assembly 6 can be well realized to adjust the flow of the cooling air output by the installation cavity towards the space inside and outside the vehicle, so that the adjusting piece 64 can output the cooling air with different flows to different positions according to actual conditions, thereby not only ensuring the safe use of the power battery cooling module, but also ensuring the riding safety of users.
In some specific embodiments, the wall thickness of the communication pipe 61, the first exhaust pipe 62, and the second exhaust pipe 63 is 1mm to 3mm, and the communication pipe 61, the first exhaust pipe 62, and the second exhaust pipe 63 can be made of HDPE or PPE-TD, and the like, and have good strength and durability, and are not easily reactive with cooling air.
In some embodiments, the first exhaust duct 62 is connected to an interior trim panel of the vehicle body to exhaust cooling air into the vehicle interior; the second exhaust pipe 63 communicates with the gap between the vehicle body interior panel and the vehicle body metal plate, and can exhaust the cooling air from the vehicle body exhaust outlet to the outside of the vehicle.
In some embodiments, as shown in FIG. 4, the adjuster 64 includes a driver 641 and a valve plate 642. The driving member 641 is provided on the outer wall of the communication pipe 61 and/or the first exhaust pipe 62. The valve plate 642 is rotatably disposed at a communication position of the communication pipe 61 and the first exhaust pipe 62, and the valve plate 642 is connected to an output end of the driving member 641.
It can be understood that the driving member 641 can adjust the rotation angle of the valve plate 642 according to actual requirements, so as to adjust the communication area between the communication pipe 61 and the first and second exhaust pipes 62 and 63, and further adjust the flow rate of the cooling air entering the interior space and the exterior space.
Specifically, the power battery cooling module further comprises a controller, the controller can receive real-time temperatures of the plurality of batteries 3, and the controller can control the driving part 641 to drive the valve plate 642 to rotate according to the temperatures of the batteries 3, so that air volume control of the first exhaust pipe 62 and the second exhaust pipe 63 is realized.
In some specific embodiments, the valve plate 642 is provided with a plurality of reinforcing ribs, and the reinforcing ribs can reinforce the strength of the valve plate 642, so that the cooling air is still stable when being input into the first exhaust pipe 62 and the second exhaust pipe 63 from the communicating pipe 61, and the vibration and noise generated when the valve plate 642 is impacted by the cooling air are effectively reduced.
Alternatively, the thickness of the valve plate 642 is 3mm to 8mm, and the valve plate 642 can be made of PPE-TD 20.
In some alternative embodiments, the driving element 641 comprises a motor with feedback function, and the motor can transmit the rotated angle of the valve plate 642 relative to the initial position to the controller, so that the controller can control the valve plate 642 according to the real-time rotated angle of the valve plate 642.
It should be noted that the communication logic and relationship between the controller and the driving element 641 is not the focus of the present invention, and even though the specific type and control manner of the controller and the driving element 641 are not mentioned in the present specification, a person skilled in the art can implement the above functions according to the technical common knowledge in the automatic control field of the prior art.
The invention also discloses a thermal runaway processing method, which adopts the power battery cooling module, and comprises the following steps: s1, the controller monitors that a thermal runaway phenomenon occurs in the shell 1; s2, the controller increases the air inflow and the air inflow speed of the air source towards the installation cavity; s3, the exhaust assembly 6 closes the channel between the installation cavity and the space inside the vehicle and adjusts the communication area between the installation cavity and the space outside the vehicle to the maximum.
It can be understood that, in the step S2, the gas circulation speed in the first air duct 4 and the second air duct 5 can be effectively increased, so that the discharge efficiency of the harmful gas and the heat dissipation speed of the battery 3 are improved, and a good mitigation effect is achieved on the thermal runaway phenomenon; step S3 can ensure that the harmful gas is not discharged into the interior space of the vehicle, and can completely discharge the harmful gas into the exterior space of the vehicle, thereby ensuring that the best protection effect can be provided for the user when the thermal runaway phenomenon occurs.
According to the thermal runaway processing method provided by the embodiment of the invention, due to the power battery cooling module, the controller can judge whether the thermal runaway phenomenon occurs according to the temperature of the battery 3, and further, the cooling air in the installation cavity is discharged from the first exhaust pipe 62 and the second exhaust pipe 63 according to the actual condition inside the battery 3, so that the rapid cooling of the battery 3 which generates thermal runaway and the reliable guarantee of the safety of a user are ensured.
Example (b):
the power battery cooling module and the thermal runaway processing method according to one embodiment of the invention are described below with reference to fig. 1 to 4.
The power battery cooling module of the present embodiment includes a housing 1, a support 2, a battery 3, an exhaust assembly 6, and a heat insulator 7.
A mounting cavity is formed in the shell 1, and an air source communicated with the mounting cavity is arranged on the top wall of the shell 1. The casing 1 includes two end plates 11, two side plates 12 and a plurality of busbar 13, is equipped with a plurality of mounting holes on two side plates 12, and every busbar 13 is connected with the electric core utmost point ear 31 of a battery 3, and every busbar 13 inlays to be established in a mounting hole. The side panels 12 are made of a heat and impact resistant material.
Support piece 2 establishes in the installation cavity, and support piece 2 is a plurality of, and a plurality of support piece 2 are equipped with a support piece 2 respectively on two inner walls of casing 1's relative setting along casing 1's length direction interval distribution, have the clearance between support piece 2's both ends and casing 1's the inner wall. The plurality of supporting pieces 2 are divided into two groups of supporting pieces, each group of supporting pieces comprises a plurality of supporting pieces 2 distributed at intervals along the length direction of the shell 1, one end of each group of supporting pieces abuts against two side walls of the heat insulation piece 7, and a gap is formed between the other end of each group of supporting pieces and two opposite independent side walls of the shell 1. The projection of the support 2 on the bottom wall of the housing 1 is S-shaped.
The batteries 3 are multiple, the battery core tab 31 of each battery 3 is connected with the inner wall of the shell 1, the battery 3 is arranged between two adjacent support pieces 2, a first air duct 4 is formed between the side wall of the battery 3 and the support pieces 2, a second air duct 5 is formed between the inner wall of the shell 1 and the end part of the battery 3, and the battery core tab 31 is positioned in the second air duct 5. A plurality of batteries 3 divide into two sets of group battery, and every group battery includes a plurality of batteries 3 that set up along the length direction interval of casing 1, and two sets of group battery interval sets up in the width direction of casing 1, and the electric core utmost point ear 31 of two sets of group battery is connected with two inner wall of casing 1's relative setting respectively.
Exhaust assembly 6 establishes on the diapire of casing 1 and with the installation cavity intercommunication, exhaust assembly 6 is used for intercommunication installation cavity and car inner space and the outer space of car, and exhaust assembly 6 is adjustable with the communicating area in car inner space and the outer space of car. The exhaust assembly 6 includes a communication pipe 61, a first exhaust pipe 62, a second exhaust pipe 63, and a regulator 64. One end of the communication pipe 61 communicates with the mounting chamber. One end of the first exhaust pipe 62 communicates with the other end of the communication pipe 61, and the other end communicates with the vehicle interior space. One end of the second exhaust pipe 63 communicates with the other end of the communication pipe 61, and the other end communicates with the vehicle exterior space. The adjuster 64 is provided at a communication portion of the communication pipe 61 and the first exhaust pipe 62, and the adjuster 64 is used to adjust a communication area between the communication pipe 61 and the first and second exhaust pipes 62 and 63. The adjuster 64 includes a driver 641 and a valve plate 642. The driving member 641 is provided on the outer wall of the communication pipe 61 and/or the first exhaust pipe 62. The valve plate 642 is rotatably disposed at a communication position of the communication pipe 61 and the first exhaust pipe 62, and the valve plate 642 is connected to an output end of the driving member 641.
One end of each group of battery packs is abutted against the side wall of the heat insulation part 7, the other end of each group of battery packs is provided with a battery cell tab 31, and the battery cell tabs 31 of the two groups of battery packs are respectively connected with the two oppositely-arranged inner walls of the shell 1.
A thermal runaway processing method adopts the power battery cooling module, and comprises the following steps: s1, the controller monitors that a thermal runaway phenomenon occurs in the shell 1; s2, the controller increases the air inflow and the air inflow speed of the air source towards the installation cavity; s3, the exhaust assembly 6 closes the channel between the installation cavity and the space inside the vehicle and adjusts the communication area between the installation cavity and the space outside the vehicle to the maximum.
In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. A power battery cooling module, characterized by includes:
the gas source device comprises a shell (1), wherein an installation cavity is formed in the shell (1), and a gas source communicated with the installation cavity is arranged on the top wall of the shell (1);
the supporting pieces (2) are arranged in the installation cavity, the supporting pieces (2) are multiple, the supporting pieces (2) are distributed at intervals along the length direction of the shell (1), the two inner walls of the shell (1) which are arranged oppositely are respectively provided with one supporting piece (2), and gaps are formed between the two ends of each supporting piece (2) and the inner walls of the shell (1);
the battery (3), the battery (3) is multiple, the cell tab (31) of each battery (3) is connected with the inner wall of the shell (1), the battery (3) is arranged between two adjacent supporting pieces (2), a first air duct (4) is formed between the side wall of the battery (3) and the supporting pieces (2), a second air duct (5) is formed between the inner wall of the shell (1) and the end of the battery (3), and the cell tab (31) is located in the second air duct (5);
exhaust subassembly (6), establish exhaust subassembly (6) on the diapire of casing (1) and with the installation cavity intercommunication, exhaust subassembly (6) are used for the intercommunication installation cavity and car inner space and the outer space of car, exhaust subassembly (6) with the car inner space with the intercommunication area in the outer space of car is adjustable.
2. The power battery cooling module according to claim 1, wherein the plurality of batteries (3) are divided into two groups of battery packs, each group of battery packs comprises a plurality of batteries (3) spaced along the length direction of the housing (1), the two groups of battery packs are spaced along the width direction of the housing (1), and the cell tabs (31) of the two groups of battery packs are respectively connected with two oppositely-disposed inner walls of the housing (1).
3. The power battery cooling module set according to claim 2, further comprising a heat insulation member (7), wherein one end of each battery pack abuts against a side wall of the heat insulation member (7), the other end of each battery pack is provided with the cell tabs (31), and the cell tabs (31) of the two battery packs are respectively connected with two oppositely-arranged inner walls of the housing (1).
4. The power battery cooling module according to claim 3, wherein the plurality of supporting members (2) are divided into two groups of supporting members, the group of supporting members comprises a plurality of supporting members (2) distributed at intervals along the length direction of the housing (1), one end of each group of supporting members abuts against two side walls of the heat insulating member (7), and the other end of each group of supporting members is provided with a gap from two side walls of the housing (1).
5. The power battery cooling module according to claim 1, wherein the housing (1) comprises two end plates (11), two side plates (12) and a plurality of bus bars (13), a plurality of mounting holes are formed in the two side plates (12), each bus bar (13) is connected with a cell tab (31) of one of the batteries (3), and each bus bar (13) is embedded in one of the mounting holes.
6. The power battery cooling module according to claim 5, characterized in that the side plates (12) are made of a heat-resistant and impact-resistant material.
7. Power battery cooling module according to claim 1, characterized in that the projection of the support (2) on the bottom wall of the housing (1) is S-shaped.
8. The power cell cooling module according to claim 1, characterized in that the exhaust assembly (6) comprises:
one end of the communication pipe (61) is communicated with the mounting cavity;
a first exhaust pipe (62), one end of the first exhaust pipe (62) being communicated with the other end of the communication pipe (61), the other end being communicated with the in-vehicle space;
a second exhaust pipe (63), one end of the second exhaust pipe (63) being communicated with the other end of the communication pipe (61), the other end being communicated with the space outside the vehicle;
and the adjusting piece (64) is arranged at the communication position of the communication pipe (61) and the first exhaust pipe (62), and the adjusting piece (64) is used for adjusting the communication area between the communication pipe (61) and the first exhaust pipe (62) and the second exhaust pipe (63).
9. The power battery cooling module according to claim 8, wherein the adjusting member (64) comprises:
a driving member (641) provided on an outer wall of the communication pipe (61) and/or the first exhaust pipe (62);
and the valve plate (642) is rotatably arranged at the communication position of the communication pipe (61) and the first exhaust pipe (62), and the valve plate (642) is connected with the output end of the driving piece (641).
10. A thermal runaway processing method using the power battery cooling module set of any one of claims 1-9, the thermal runaway processing method comprising:
s1, monitoring that a thermal runaway phenomenon occurs in the shell (1) by a controller;
s2, the controller increases the air inlet amount and the air inlet speed of the air source towards the installation cavity;
s3, the exhaust assembly (6) closes the channel between the installation cavity and the space inside the vehicle and adjusts the communication area between the installation cavity and the space outside the vehicle to the maximum.
CN202011342168.2A 2020-11-25 2020-11-25 Power battery cooling module and thermal runaway processing method Pending CN112467245A (en)

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