CN111613751A - Power battery assembly and vehicle - Google Patents

Power battery assembly and vehicle Download PDF

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Publication number
CN111613751A
CN111613751A CN202010543538.2A CN202010543538A CN111613751A CN 111613751 A CN111613751 A CN 111613751A CN 202010543538 A CN202010543538 A CN 202010543538A CN 111613751 A CN111613751 A CN 111613751A
Authority
CN
China
Prior art keywords
power battery
battery module
assembly
cooling
explosion
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
CN202010543538.2A
Other languages
Chinese (zh)
Inventor
卢军
乔延涛
姜云峰
刘鹏
周琪
于鹏
王明
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.)
FAW Group Corp
Original Assignee
FAW Group Corp
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 FAW Group Corp filed Critical FAW Group Corp
Priority to CN202010543538.2A priority Critical patent/CN111613751A/en
Publication of CN111613751A publication Critical patent/CN111613751A/en
Priority to PCT/CN2021/097108 priority patent/WO2021254130A1/en
Pending legal-status Critical Current

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    • 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
    • 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
    • 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
    • B60L58/27—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 heating
    • 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
    • H01M10/615—Heating or keeping warm
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to the technical field of power batteries for fuel cell vehicles, and discloses a power battery assembly and a vehicle, wherein the power battery assembly comprises a shell component, a power battery module, a high-voltage plug connector, a distribution box, an explosion-proof valve and a battery thermal management system; a plurality of power battery modules connected in series are arranged in the shell component; the high-voltage plug is arranged on the shell component and used for connecting external electric equipment; the distribution box is arranged in the shell component and is connected with the high-voltage plug connector and the power battery module; the explosion-proof valve is arranged on the shell component and used for pressure relief; the battery thermal management system is disposed within the housing assembly for cooling or heating the power battery module. The explosion-proof valve is used for pressure relief, and after the interior of the power battery assembly is subjected to rapid increase caused by severe change, the pressure relief is carried out, so that unnecessary safety accidents caused by high-voltage explosion battery assemblies are prevented. The battery thermal management system is used for cooling or heating the power battery module, so that the temperature of the power battery module is stabilized within a reasonable temperature range.

Description

Power battery assembly and vehicle
Technical Field
The invention relates to the technical field of power batteries for vehicles, in particular to a power battery assembly and a vehicle.
Background
The fuel cell vehicle has the advantages of high power generation efficiency, zero emission, no pollution, high specific energy, low noise, high reliability and the like. The development prospect of the fuel cell automobile is very wide. However, in the actual operation stage of the fuel cell vehicle, besides the fuel cell stack, a power cell system needs to be matched. The power battery system is used as a main energy storage component of the fuel battery vehicle, mainly ensures the functions of low-speed running of the whole vehicle, braking energy recovery, energy regulation of a fuel battery engine system and the like, and has self-evident importance. When the temperature or the pressure of the fuel cell is too high, the fuel cell can be damaged, and even safety accidents such as fuel cell explosion can occur when the existing fuel cell is used, particularly when accidents happen.
Therefore, a power battery assembly and a vehicle are needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a power battery assembly and a vehicle, which can adjust the pressure and the temperature of the power battery assembly and ensure the use safety and stability.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, a power battery assembly is provided, including:
a housing assembly;
the shell component is internally provided with a plurality of power battery modules which are connected in series;
the high-voltage plug connector is arranged on the shell assembly and is used for connecting external electric equipment;
the distribution box is arranged in the shell assembly and is connected with the high-voltage plug connector and the power battery module;
the explosion-proof valve is arranged on the shell assembly and used for pressure relief;
and the battery thermal management system is arranged in the shell assembly and is used for cooling or heating the power battery module.
Preferably, the housing assembly comprises an upper housing and a lower housing which are hermetically connected, the power battery module and the distribution box are arranged in the lower housing, and the high-voltage plug connector and the explosion-proof valve are arranged on the side wall of the lower housing.
Preferably, a sealing gasket is disposed between the upper housing and the lower housing.
Preferably, the power battery module is connected in series through the high-voltage wire harness, the power battery module is connected with the distribution box through the high-voltage wire harness, and the distribution box is connected with the high-voltage plug connector through the high-voltage wire harness.
Preferably, the battery thermal management system comprises a cooling plate and a cooling pipe, the cooling plate is arranged in the lower shell, the power battery module is arranged on the cooling plate, a cooling channel is arranged in the cooling plate, and the cooling pipe is connected to the cooling plate.
Preferably, the power battery module further comprises a control assembly and a low-voltage wire harness, wherein the control assembly comprises a control main board and a control sub-board, the control main board is connected with the control sub-board through the low-voltage wire harness, and the power battery module is connected with the control sub-board through the low-voltage wire harness.
Preferably, the power battery assembly further comprises an insulation detector arranged in the lower shell, and the insulation detector is used for detecting the insulation resistance value of the power battery assembly.
Preferably, a plurality of connecting lugs are arranged on the outer side of the lower shell, and a bushing is arranged on each connecting lug.
Preferably, still include the support, it is including backup pad and the mounting panel that is connected, the backup pad is fixed in on the casing down, the mounting panel is located the top of power battery module, the control mainboard the control daughter board the insulation detector all set up in on the mounting panel.
In another aspect, a vehicle is provided, which includes the power battery assembly as described above.
The invention has the beneficial effects that:
the plurality of power battery modules connected in series form a high-voltage loop which is used as the output voltage of the power battery assembly. The high-voltage plug is used for connecting external electric equipment, so that the power battery module can transmit electric energy for the external electric equipment. The high-voltage distribution box is used for controlling the on-off of the high-voltage output circuit and detecting current and voltage, so that the power battery module can be conveniently adjusted, and the current and voltage of the power battery assembly can be stabilized. The explosion-proof valve is used for pressure relief, and after the interior of the power battery assembly is subjected to rapid increase caused by severe change, the pressure relief is carried out, so that unnecessary safety accidents caused by high-voltage explosion of the power battery assembly are prevented. The battery thermal management system is used for cooling or heating the power battery module, so that the temperature of the power battery module is stabilized within a reasonable temperature range, and the working stability of the power battery module is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a power battery assembly provided by the present invention;
FIG. 2 is a schematic structural view of a power cell assembly provided by the present invention (excluding the upper housing);
fig. 3 is a schematic partial structure diagram of a power battery assembly provided by the invention.
In the figure: 1. a housing assembly; 11. a lower housing; 111. connecting lugs; 112. a bushing; 12. an upper housing; 13. a gasket;
2. a power battery module; 3. a high-voltage plug-in connector; 4. a distribution box; 5. an explosion-proof valve;
6. a battery thermal management system; 61. a cooling plate; 62. a cooling tube; 7. a control assembly; 71. a control main board; 72. a control daughter board; 73. a low voltage wire harness;
8. an insulation detector; 9. and (4) a bracket.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. 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.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1-3, the present embodiment discloses a power battery assembly, which includes a housing assembly 1, a plurality of power battery modules 2, a high-voltage connector 3, a distribution box 4, an explosion-proof valve 5, a battery thermal management system 6, a high-voltage wire harness, a control assembly 7, a low-voltage wire harness 73, and an insulation detector 8.
Specifically, the housing assembly 1 structurally includes an upper housing 12 and a lower housing 11 which are hermetically connected, and a gasket 13 is provided between the upper housing 12 and the lower housing 11, and the gasket 13 can ensure the sealing performance of the housing assembly 1. The lower shell 11 is deep, and serves as a mounting point for other components of the power battery assembly, and the upper shell 12 mainly cooperates with the lower shell 11 to perform a sealing function.
The lower shell 11 is formed by welding aluminum alloy sections, so that the structural strength of the power battery assembly is guaranteed, and the lightweight design of the assembly can be realized. And moreover, the aluminum profile can absorb certain energy after the power battery assembly is collided, and internal components are protected from further damage. The upper shell 12 is made of long glass fiber non-metallic materials and mainly plays a role in covering protection, and after the power battery module 2 in the shell assembly 1 is thermally failed, certain energy can be absorbed, and damage to the whole vehicle caused by thermal runaway is reduced.
The shell assembly 1 is T-shaped, the shell assembly 1 comprises a first bearing part and a second bearing part which are connected with each other in shape, and the second bearing part is perpendicular to the first bearing part and is connected to the middle part of the first bearing part. The width of first bearing part is great, mainly is as the bearing part of power battery module 2, and can guarantee that the focus of power battery assembly is located first bearing part, is located the rear portion promptly, has guaranteed the stability and the fastness of power battery assembly.
A plurality of engaging lugs 111 are provided on the outer side of the lower case 11, and a bushing 112 is provided on the engaging lug 111. Specifically, two engaging lugs 111 are respectively arranged at two ends of the first bearing part, and one engaging lug 111 is respectively arranged at two sides of the second bearing part. The bushing 112 is made of steel and is screwed into two screw bosses, so that the screw bosses can protect the connecting lug 111 on the lower case 11 from being crushed when the power battery assembly is fixed on the vehicle body.
Be provided with the power battery module 2 of a plurality of series connections in the casing 11 down, specifically, the power battery group passes through the high-pressure pencil and establishes ties, forms high-pressure return circuit, and the high-pressure pencil is high pressure resistant copper bar. The first bearing part is internally provided with most of the power battery modules 2 in parallel, and the second bearing part is internally provided with a small number of the power battery modules 2. The power battery module 2 is welded on the mounting position, the mounting position is not required to be specially arranged on the lower shell 11, the complex structural design can be met, and the universal design is realized.
The distribution box 4 (in this embodiment, the high-voltage distribution box 4) is disposed in the lower housing 11, specifically, in the second bearing portion, and the distribution box 4 and the power battery module 2 are connected by a high-voltage wire harness. The high-voltage distribution box 4 is mainly used for controlling the on-off of a high-voltage output loop and detecting current and voltage, and is also connected with the high-voltage loops inside and outside the power battery assembly. The high-pressure plug 3 and the explosion-proof valve 5 are both arranged on the side wall of the lower shell 11, specifically, the high-pressure plug 3 is arranged at the end part of the second bearing part and is connected with the distribution box 4 through a high-pressure wire harness. The high-voltage plug 3 is used for connecting external electric equipment, and in the embodiment, is mainly connected with a motor of a vehicle to provide electric energy for the motor to drive the vehicle to run. The explosion-proof valve 5 is used for pressure relief, and the pressure relief is mainly carried out after the interior of the power battery assembly is subjected to sharp increase caused by severe change, so that unnecessary safety accidents caused by high-voltage explosion of the power battery assembly are prevented.
A battery thermal management system 6 is disposed within the housing assembly 1, the battery thermal management system 6 being used to cool or heat the power battery module 2. Specifically, the battery thermal management system 6 includes a cooling plate 61 and a cooling pipe 62, and the cooling plate 61 is disposed in the lower case 11 and fixed to a bottom plate of the lower case 11. The power battery modules 2 are arranged on the cooling plate 61, partition plates are arranged between the transverse power battery modules 2 and the longitudinal adjacent power battery modules 2, the partition plates are connected in a welding and sealing mode, a plurality of cavities are formed by the partition plates, and the power battery modules 2 are arranged in the cavities. When one power battery module 2 is damaged and leaked, the power battery module can not stretch into other cavities, and the sealing performance of the whole power battery assembly is effectively guaranteed.
A cooling channel is provided in the cooling plate 61, one end of the cooling pipe 62 is connected to the cooling plate 61, and the other end is connected to an external coolant supply device (a thermal management cooling system of a vehicle in this embodiment), specifically, a water pipe joint is welded to an end portion of the second bearing portion of the lower housing 11, and the cooling pipe 62 is connected to the external coolant supply device through the water pipe joint. The water pipe joint is welded on the lower shell 11, so that the plate joint is prevented from being installed at the end part of the lower shell 11, and the consistent sealing performance of the whole shell assembly 1 and the structural strength of the lower shell 11 are ensured. The cooling liquid supply equipment leads cooling liquid to the cooling plate 61 through the cooling pipe 62 to be used for cooling or heating the power battery module 2, so that the temperature of the power battery module 2 is stabilized in a reasonable temperature range, and the working stability of the power battery module 2 is ensured.
The cooling plate 61 is formed by brazing an aluminum alloy stamped plate, and a cooling channel is formed inside the cooling plate and used for allowing flowing cooling liquid to pass through to heat or cool the power battery module 2. The main material of the cooling pipe 62 is nylon, the cooling pipe 62 is a nylon light pipe, and the two ends of the cooling pipe are provided with quick-insertion structures, so that the cooling pipe can be conveniently connected with the cooling plate 61 and external cooling liquid supply equipment. Be provided with temperature sensor on the cooling tube 62 for detect the temperature of coolant liquid, be convenient for carry out temperature monitoring to power battery module 2.
The insulation detector 8 is arranged in the lower shell 11 and used for detecting the insulation resistance value of the power battery assembly. The control assembly 7 comprises a control main board 71 and a control sub-board 72, the control main board 71 and the control sub-board 72 are connected through a low-voltage wiring harness 73, and the power battery module 2 and the control sub-board 72 are connected through the low-voltage wiring harness 73. The explosion-proof valve 5, the temperature sensor on the cooling pipe 62, the insulation detector 8 and the distribution box 4 are all connected to the control main board 71 through a low-voltage wire harness 73. The control main board 71 is also connected to an external low-pressure circuit via a low-pressure harness 73. In this embodiment, the number of the control sub-boards 72 is plural (specifically, four), and the plural control sub-boards 72 are distributed in the lower housing 11.
Optionally, the power battery assembly further includes a support 9, which includes a support plate and a mounting plate connected to each other, the support plate is fixed on the lower housing 11, the mounting plate is located above the power battery module 2, and the control main board 71, the control sub-board 72, and the insulation detector 8 are all disposed on the mounting plate. The support 9 is made of steel, so that the impact of the battery caused by gas spraying can be effectively prevented, the thermal runaway of the power battery module 2 is delayed, and more escape time is provided for passengers on the vehicle.
The plurality of power battery modules 2 connected in series form a high-voltage loop as the output voltage of the power battery assembly. The high-voltage plug 3 is used for connecting external electric equipment, so that the power battery module 2 can transmit electric energy for the external electric equipment. The high-voltage distribution box 4 is used for controlling the on-off of a high-voltage output loop and detecting current and voltage, so that the power battery module 2 can be conveniently adjusted, and the current and voltage of the power battery assembly can be stabilized. The explosion-proof valve 5 is used for releasing pressure, and after the interior of the power battery assembly is subjected to rapid increase caused by severe change, the pressure is released, so that unnecessary safety accidents caused by high-voltage explosion of the power battery assembly are prevented. The battery thermal management system 6 is used for cooling or heating the power battery module 2, so that the temperature of the power battery module 2 is stabilized within a reasonable temperature range, and the working stability of the power battery module 2 is ensured.
The embodiment also discloses a vehicle which comprises the power battery assembly.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A power cell assembly, comprising:
a housing assembly (1);
the power battery module (2), a plurality of power battery modules (2) which are connected in series are arranged in the shell component (1);
the high-voltage plug connector (3) is arranged on the shell component (1) and is used for connecting external electric equipment;
the distribution box (4) is arranged in the shell component (1), and the distribution box (4) is connected with the high-voltage plug connector (3) and the power battery module (2);
the explosion-proof valve (5) is arranged on the shell assembly (1), and the explosion-proof valve (5) is used for releasing pressure;
the battery thermal management system (6) is arranged in the shell component (1), and the battery thermal management system (6) is used for cooling or heating the power battery module (2).
2. The power battery assembly according to claim 1, wherein the housing assembly (1) comprises an upper housing (12) and a lower housing (11) which are hermetically connected, the power battery module (2) and the distribution box (4) are both arranged in the lower housing (11), and the high-voltage plug connector (3) and the explosion-proof valve (5) are both arranged on the side wall of the lower housing (11).
3. The power battery assembly according to claim 2, characterized in that a sealing gasket (13) is arranged between the upper housing (12) and the lower housing (11).
4. The power battery assembly according to claim 1, further comprising a high voltage wire harness, wherein the power battery modules (2) are connected in series through the high voltage wire harness, the power battery modules (2) are connected with the distribution box (4) through the high voltage wire harness, and the distribution box (4) is connected with the high voltage plug (3) through the high voltage wire harness.
5. The power battery assembly according to claim 2, wherein the battery thermal management system (6) comprises a cooling plate (61) and a cooling pipe (62), the cooling plate (61) is arranged in the lower shell (11), the power battery module (2) is arranged on the cooling plate (61), a cooling channel is arranged in the cooling plate (61), and the cooling pipe (62) is connected to the cooling plate (61).
6. The power battery assembly according to claim 2, characterized by further comprising a control assembly (7) and a low-voltage wiring harness (73), wherein the control assembly (7) comprises a control main board (71) and a control sub-board (72), the control main board (71) and the control sub-board (72) are connected through the low-voltage wiring harness (73), and the power battery module (2) and the control sub-board (72) are connected through the low-voltage wiring harness (73).
7. The power battery assembly according to claim 6, further comprising an insulation detector (8) disposed in the lower casing (11), wherein the insulation detector (8) is configured to detect an insulation resistance value of the power battery assembly.
8. The power battery assembly according to claim 2, characterized in that a plurality of connecting lugs (111) are arranged on the outer side of the lower shell (11), and a bushing (112) is arranged on each connecting lug (111).
9. The power battery assembly according to claim 7, further comprising a bracket (9) including a support plate and a mounting plate connected with each other, wherein the support plate is fixed on the lower casing (11), the mounting plate is located above the power battery module (2), and the control main board (71), the control sub-board (72) and the insulation detector (8) are all disposed on the mounting plate.
10. A vehicle, characterized in that it comprises a power cell assembly according to any one of claims 1-9.
CN202010543538.2A 2020-06-15 2020-06-15 Power battery assembly and vehicle Pending CN111613751A (en)

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