CN113471612A - Battery module - Google Patents

Battery module Download PDF

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Publication number
CN113471612A
CN113471612A CN202110731042.2A CN202110731042A CN113471612A CN 113471612 A CN113471612 A CN 113471612A CN 202110731042 A CN202110731042 A CN 202110731042A CN 113471612 A CN113471612 A CN 113471612A
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CN
China
Prior art keywords
battery
battery module
heat dissipation
bottom plate
cell units
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
CN202110731042.2A
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Chinese (zh)
Inventor
孟涛
其他发明人请求不公开姓名
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.)
Human Horizons Jiangsu Power Battery System Co Ltd
Original Assignee
Human Horizons Jiangsu Power Battery System 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 Human Horizons Jiangsu Power Battery System Co Ltd filed Critical Human Horizons Jiangsu Power Battery System Co Ltd
Priority to CN202110731042.2A priority Critical patent/CN113471612A/en
Publication of CN113471612A publication Critical patent/CN113471612A/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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • 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
    • H01M10/61—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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates 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
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a battery module, which comprises a battery array, a bottom plate and at least one heat dissipation isolating piece, wherein the bottom plate is provided with a plurality of heat dissipation isolating pieces; the battery array comprises at least two battery cell units, and the at least two battery cell units are arranged on the top surface of the bottom plate along the length direction of the bottom plate; and one heat dissipation isolating piece is correspondingly arranged between any two adjacent battery cell units. According to the battery module provided by the embodiment of the invention, by designing the battery module structure in which the heat dissipation isolating piece and the battery cell unit of the battery are mutually matched, the heat dissipation capacity of the battery module is improved, the thermal runaway risk of the battery cell is reduced and the overall performance of the battery module is ensured while the structural stability is ensured.

Description

Battery module
Technical Field
The invention relates to the technical field of energy storage devices, in particular to a battery module.
Background
With the continuous development of new energy technology, electric vehicles are gradually favored by consumers by virtue of the advantages of energy conservation and environmental protection, and as a power source of the electric vehicles, the quality of a power battery is not only related to the running mileage of the whole vehicle, but also is closely related to the safety and reliability of the electric vehicles.
In recent years, in order to meet market demands and improve the cruising ability of electric vehicles, power batteries are gradually improved towards multi-module. Current PACK structure is to form battery module with a plurality of electric core encapsulation in same shell frame, closely arranges several battery module again, forms power battery package by BMS and thermal management system common control or management, but can lead to the electric core temperature rise in the battery module very fast like this, causes the heat to pile up easily, reduces the life of battery, can influence power battery's normal use when serious, causes electric automobile's incident even.
Disclosure of Invention
The invention provides a battery module, which aims to solve the technical problem that the temperature of a battery core rises quickly due to poor heat dissipation performance of the conventional battery module.
In order to solve the above technical problem, an embodiment of the present invention provides a battery module, including a battery array, a bottom plate, and at least one heat dissipation spacer;
the battery array comprises at least two battery cell units, and the at least two battery cell units are arranged on the top surface of the bottom plate along the length direction of the bottom plate;
and one heat dissipation isolating piece is correspondingly arranged between any two adjacent battery cell units.
As one preferable scheme, the heat dissipation separator is a heat dissipation separator, and a first insulating portion is arranged on a side surface of the heat dissipation separator, which is close to the battery cell unit;
the first insulating portion is constituted by an insulating coating or a plurality of insulating sheets.
As one of the preferable schemes, the battery module further includes top plates having the same number as the number of the battery cell units, and each of the top plates covers the top surface of the corresponding battery cell unit.
Preferably, the bottom plate is provided with side plates at both sides in the longitudinal direction, and the side plates extend above the top surface of the bottom plate.
As one preferable scheme, a structural adhesive is arranged between the side plate and the cell unit.
Preferably, the side plate and the heat dissipation spacer are connected by a first fastener.
As one preferable scheme, a structural adhesive is arranged between the battery cell unit and the top surface of the bottom plate.
As one preferable scheme, end plates are arranged on the outer sides of the head and the tail of the battery cell units of the battery array, and second insulating parts are arranged between the head and the tail of the battery cell units of the battery array and the corresponding end plates;
the second insulating portion is constituted by an insulating coating or a plurality of insulating sheets.
Preferably, the end plate and the side plate are connected through a second fastener.
As one of the preferable schemes, the first fastening piece is a rivet or a bolt; the second fastener is a rivet or a bolt.
Compared with the prior art, the battery module group has the advantages that the battery module group is formed by a battery array, a bottom plate and at least one heat dissipation isolation piece, wherein the battery array comprises at least two battery cell units, and the at least two battery cell units are arranged on the top surface of the bottom plate along the length direction of the bottom plate; the battery module is characterized in that the battery module is provided with a plurality of battery cell units, the battery cell units are arranged in a corresponding manner, the heat dissipation isolating pieces can play a role in heat dissipation and isolation, are different from the heat dissipation isolating pieces in the prior art, the additionally-increased heat dissipation isolating pieces can not only ensure the stable structure of the battery module, but also improve the heat dissipation performance of each battery cell unit, prevent the over-high temperature of the battery cell, and ensure the consistency of the temperature difference of the battery cell. Therefore, the whole battery module provided by the invention has the advantages that the stable structure is ensured, the heat dissipation capacity of the battery module is improved, the thermal runaway risk of the battery core heat is reduced, and the overall performance of the battery module is ensured.
Drawings
Fig. 1 is an exploded view of a battery module according to one embodiment of the present invention;
fig. 2 is a schematic structural view of a battery module according to an embodiment of the present invention;
reference numerals:
wherein, 1, a bottom plate; 2. a heat dissipation spacer; 3. a cell unit; 3', a cell unit; 4. a top plate; 4', a top plate; 5. a side plate; 51. a fixed point; 52. a first fastener; 6. an end plate; 6', end plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first," "second," "third," etc. may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description of the present application, it is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as those skilled in the art will recognize the specific meaning of the terms used in the present application in a particular context.
An embodiment of the present invention provides a battery module, and in particular, refer to fig. 1 to 2, where fig. 1 is an exploded view of the battery module in one embodiment of the present invention, and fig. 2 is a schematic structural view of the battery module in one embodiment of the present invention, and includes a battery array, a base plate 1 and at least one heat dissipation spacer 2.
It should be noted that, in the embodiment of the present invention, the material of the bottom plate 1 is preferably a liquid cooling plate (water cooling plate), which can reduce the weight of the structural members of the battery pack while ensuring the strength of the module. Of course, the battery module has certain requirements for the performance index of the liquid cooling plate: the heat dissipation power is high, so that heat generated by the battery module can be quickly taken away, and the rapid temperature rise is prevented; secondly, the liquid cooling plate has high sealing performance, and when the electric automobile runs on a road, the battery pack in a working state passes through various harsh working environments such as vibration, impact, high and low temperature and the like, so that the working voltage of the battery module can reach hundreds of volts, and the leakage of the cooling liquid is bound to be a very severe problem (even if the cooling liquid with good insulating performance is used, the insulating performance of the cooling liquid can be immediately reduced after the cooling liquid is doped with external substances, so that certain safety risk is caused), so that the sealing reliability of the liquid cooling plate is particularly important; the heat dissipation design is accurate, and the phenomenon that the temperature difference in a battery system is too large (the working temperature has important influence on the performance and the aging of the battery) is avoided; finally, the requirement on weight is met, the battery module focuses on light weight at present, if too much weight is taken up by the liquid cooling plate, the energy density of the battery module can be directly influenced, and the design requirement on light weight is not met.
The battery array in this embodiment includes at least two cell units (including the cell unit 3 and the cell unit 3'), where the at least two cell units are arranged on the top surface of the base plate 1 along the length direction of the base plate 1.
The electric core is the minimum unit of the power battery and is also an electric energy storage unit, and the electric core has higher energy density so as to store electric energy as much as possible and enable the electric automobile to have longer endurance mileage. Of course, the electric core unit 3 in this embodiment includes a certain number of electric cores, as shown in fig. 1, one electric core unit 3 is composed of two rows of multiple electric cores, and it is considered that the electric cores are the main heat sources of the battery module in the working process, therefore, the number of the electric cores in each electric core unit 3 and the arrangement mode thereof need to be comprehensively considered for different vehicle models and product design requirements, and are not repeated herein.
In this embodiment, one heat dissipation spacer 2 is correspondingly disposed between any two adjacent battery cell units 3. The heat dissipation isolation piece 2 can play the effect of heat dissipation and isolation, and is different from the closely arranged or increased heat insulating pad in the prior art, and the additional increase of the heat dissipation isolation piece 2 not only can guarantee the stable in structure of battery module, but also can improve the heat dissipation performance of each electric core unit 3, prevents that electric core temperature from being too high, guarantees the uniformity of electric core temperature difference.
Further, in the above embodiment, the heat dissipation spacer 2 is a heat dissipation partition plate, and a first insulating portion is disposed on a side surface of the heat dissipation partition plate close to the battery cell unit 3; the first insulating portion is constituted by an insulating coating or a plurality of insulating sheets. The design structure of the first insulating portion can further optimize independence between each battery cell unit 3, so that an insulating sheet or an insulating coating exists between each battery cell unit 3 and the corresponding heat dissipation partition plate, and the friction force generated by extrusion improves connection tightness between components.
Further, in the above embodiment, the battery module further includes top plates (including the top plate 4 and the top plate 4') having the same number as the cell units 3, and each of the top plates covers the top surface of the corresponding cell unit 3. The top plate is used for covering the top side of the battery module by the cover plate, the stability of the structure can be guaranteed, preferably, the structure of the top plate comprises an FPC (flexible circuit board) and a cover plate assembly, the FPC (flexible circuit board) can be welded in the cover plate through a related welding process, so that the top plate is connected with an external battery management system, the cover plate assembly is preferably made of aluminum bars, the aluminum bars are combined with double-sided metal sheets through the process and widely applied to materials, and the welding effect in the embodiment can be optimized.
Further, in the above embodiment, the side plates 5 are provided on both sides of the bottom plate 1 in the longitudinal direction, and the side plates 5 extend upward from the top surface of the bottom plate 1. The overall structure's of battery module stability can be guaranteed in the design of curb plate 5, can play the guard action of preferred to the inside electric core unit of battery module simultaneously, improves the fail safe nature of battery module.
Preferably, in this embodiment, in consideration of the long length of the side plate 5, a plurality of fixing points 51 (distributed along the length direction of the side plate 5) are provided at the outer side of the side plate, and the fixing points 51 are used for connecting a whole battery module with external related equipment or clamping a plurality of battery modules through the fixing points 51, so as to improve the structural stability of the power battery Pack formed by the battery modules and increase the strength of the battery modules after being mounted on the Pack.
In order to further optimize the overall structural stability of the battery module, structural adhesive is arranged between the side plate 5 and the battery cell unit 3. The structural adhesive in the embodiment is an adhesive which has high strength (compressive strength is greater than 65MPa, steel-steel positive tensile bonding strength is greater than 30MPa, and shear strength is greater than 18MPa), can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, has stable performance in the expected life, and is suitable for bearing strong structural part bonding.
In the above embodiment, the side plate 5 is connected to the heat dissipation spacer 2 through the first fastening member 52, so that it is ensured that no shake occurs between the side plate 5 and the heat dissipation spacer 2, and the stability of the battery module is improved.
Similarly, in this embodiment, a structural adhesive is also disposed between the battery cell unit 3 and the top surface of the bottom plate 1. The structural adhesive also needs to be designed according to design requirements and cost factor limitations of different vehicle types, and is not described in detail herein.
Preferably, in the above embodiment, end plates (including a front end plate 6 and a rear end plate 6') are respectively disposed on outer sides of the first and last two cell units 3 of the battery array, and a second insulating portion is respectively disposed between the first and last two cell units 3 of the battery array and the corresponding end plate 6; the second insulating portion is constituted by an insulating coating or a plurality of insulating sheets. There is insulating piece or insulating coating between two electric core units in the front and back of battery array and the end plate that corresponds (between electric core unit 3 and end plate 6, between electric core unit 3 'and the end plate 6'), and the frictional force that produces through the extrusion is connected, and then guarantees the stable in structure of battery module.
In addition, the end plate 6 and the bottom plate 1 in this embodiment may be connected by a welding process, and the end plate and the side plate 5 may also be connected by a welding process, so that the end plate 6, the bottom plate 3, and the side plate 5 have a certain mechanical stability, and naturally, related fixing members may be added while welding to enhance the tightness of connection, for example, riveting, bolting, etc.; except for welding process, this embodiment also can realize the stable connection between above-mentioned end plate 6, bottom plate 1, 5 three of curb plate through the joint through the relevant joint structure of design, and concrete joint form is no longer repeated once more.
Further, in the above embodiment, the end plate 6 and the side plate 3 are connected by the second fastening member.
The first fastener 52 in this embodiment is a rivet or a bolt; the second fasteners are rivets or bolts, that is, the first fasteners 52 for connecting the side plates 5 and the heat dissipation spacers 2 may be rivets or bolts, the second fasteners for connecting the end plates 6 and the side plates 5 may also be rivets or bolts, and the first fasteners 52 and the second fasteners may be the same fasteners or may be different fasteners.
When a plurality of battery cell units 3 are packaged together through the structure of the bottom plate 1, the end plate 6, the top plate 4, the side plates 5 and the heat dissipation spacers 2, corresponding battery modules are formed, and after the plurality of battery modules are controlled or managed together by the BMS and the heat management system, the unified whole is called a power battery pack.
The battery module provided by the embodiment of the invention has the beneficial effects that at least one point in the following points is selected:
(1) the bottom plate plays a role in stabilizing the weight of the battery cell;
(2) the side plates, the top plate and the end plates can play a good role in coating the battery cell;
(3) the heat dissipation isolating piece can isolate the two parts of the battery cell units to form corresponding independent units, so that the heat spreading effect after the battery cell is out of control due to heat is reduced;
(4) the radiating isolation parts are tightly connected with the side plates and the side plates are tightly connected with the end plates through corresponding fasteners, so that the strength of the battery module is improved;
(5) the method comprises the following steps of constructing a battery module jointly consisting of a battery array, a bottom plate and at least one heat dissipation separator, wherein the battery array comprises at least two battery cell units, and the at least two battery cell units are arranged on the top surface of the bottom plate along the length direction of the bottom plate; the battery module is characterized in that the battery module is provided with a plurality of battery cell units, the battery cell units are arranged in a corresponding manner, the heat dissipation isolating pieces can play a role in heat dissipation and isolation, are different from the heat dissipation isolating pieces in the prior art, the additionally-increased heat dissipation isolating pieces can not only ensure the stable structure of the battery module, but also improve the heat dissipation performance of each battery cell unit, prevent the over-high temperature of the battery cell, and ensure the consistency of the temperature difference of the battery cell. Therefore, the whole battery module provided by the invention has the advantages that the stable structure is ensured, the heat dissipation capacity of the battery module is improved, the thermal runaway risk of the battery core heat is reduced, and the overall performance of the battery module is ensured.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. A battery module is characterized by comprising a battery array, a bottom plate and at least one heat dissipation separator;
the battery array comprises at least two battery cell units, and the at least two battery cell units are arranged on the top surface of the bottom plate along the length direction of the bottom plate;
and one heat dissipation isolating piece is correspondingly arranged between any two adjacent battery cell units.
2. The battery module according to claim 1, wherein the heat dissipation spacer is a heat dissipation partition, and a first insulating portion is provided on a side surface of the heat dissipation partition, which is close to the cell unit;
the first insulating portion is constituted by an insulating coating or a plurality of insulating sheets.
3. The battery module of claim 1, further comprising a number of top plates equal to the number of the cell units, wherein each top plate covers a top surface of a corresponding cell unit.
4. The battery module according to claim 3, wherein side plates are provided on both longitudinal side portions of the bottom plate, and the side plates extend above the top surface of the bottom plate.
5. The battery module of claim 4, wherein a structural adhesive is disposed between the side plates and the cell units.
6. The battery module according to claim 4, wherein the side plates and the heat dissipation spacer are coupled by a first fastening member.
7. The battery module of claim 1, wherein a structural adhesive is disposed between the cell unit and the top surface of the base plate.
8. The battery module of claim 6, wherein end plates are arranged on the outer sides of the first and last cell units of the battery array, and second insulating parts are arranged between the first and last cell units of the battery array and the corresponding end plates;
the second insulating portion is constituted by an insulating coating or a plurality of insulating sheets.
9. The battery module according to claim 8, wherein the end plates and the side plates are coupled by second fasteners.
10. The battery module according to claim 9, wherein the first fastening member is a rivet or a bolt; the second fastener is a rivet or a bolt.
CN202110731042.2A 2021-06-29 2021-06-29 Battery module Pending CN113471612A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115084770A (en) * 2022-07-20 2022-09-20 天津市捷威动力工业有限公司 Combined battery module middle fixing device and battery module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115084770A (en) * 2022-07-20 2022-09-20 天津市捷威动力工业有限公司 Combined battery module middle fixing device and battery module
CN115084770B (en) * 2022-07-20 2023-07-07 天津市捷威动力工业有限公司 Combined type battery module middle fixing device and battery module

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