CN112117509A - Power battery pack and vehicle with same - Google Patents

Power battery pack and vehicle with same Download PDF

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Publication number
CN112117509A
CN112117509A CN201910544880.1A CN201910544880A CN112117509A CN 112117509 A CN112117509 A CN 112117509A CN 201910544880 A CN201910544880 A CN 201910544880A CN 112117509 A CN112117509 A CN 112117509A
Authority
CN
China
Prior art keywords
battery pack
power battery
outlet pipe
liquid cooling
pipe
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.)
Granted
Application number
CN201910544880.1A
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Chinese (zh)
Other versions
CN112117509B (en
Inventor
周江涛
鲁志佩
朱燕
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BYD Co Ltd
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BYD Co Ltd
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Priority to CN201910544880.1A priority Critical patent/CN112117509B/en
Publication of CN112117509A publication Critical patent/CN112117509A/en
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Publication of CN112117509B publication Critical patent/CN112117509B/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/617Types of temperature control for achieving uniformity or desired distribution of temperature
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6551Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6554Rods or plates
    • H01M10/6555Rods or plates arranged between the cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6556Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567Liquids
    • H01M10/6568Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The application discloses power battery package and have its vehicle, power battery package includes: a plurality of unit cells; the heat management system, the heat management system includes the liquid cooling board, the liquid cooling board has a plurality of inlet tubes side by side and a plurality of outlet pipes side by side, just a plurality of side by side the inlet tube with a plurality of outlet pipes side by side are crisscross spaced apart to be arranged, the first end of inlet tube and adjacent one the first end of outlet pipe links to each other in order to form the circulation return circuit, the second end of inlet tube sets up to the water inlet, the second end of outlet pipe sets up to the delivery port. According to the power battery package of this application, through setting up a plurality of inlet tubes and a plurality of outlet pipe in order to form a plurality of circulation return circuits to promote the homogeneity of the inside temperature of the thermal management system of power battery package, also promoted the heat exchange efficiency of power battery package.

Description

Power battery pack and vehicle with same
Technical Field
The application belongs to the technical field of vehicle manufacturing, and particularly relates to a power battery pack and a vehicle with the same.
Background
In the correlation technique, the design of conventional liquid cooling pipe, coolant liquid have very long circulation route in the pipeline, and this will lead to the part coolant temperature that is close to the water inlet low, advances the battery cooling circulation of long distance, and the part temperature that is close to the delivery port is high to make heat exchange efficiency low, the inside temperature homogeneity of liquid cooling pipe is low, can't satisfy the requirement of battery temperature homogeneity.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, an object of the present application is to provide a power battery pack, which has high uniformity of battery temperature and high heat exchange efficiency.
According to power battery package of this application embodiment, include: a plurality of unit cells; a plurality of unit cells; the plurality of single batteries are positioned in the battery shell; the heat management system comprises a liquid cooling plate, wherein the liquid cooling plate is provided with a plurality of side-by-side water inlet pipes and a plurality of side-by-side water outlet pipes, the plurality of side-by-side water inlet pipes and the plurality of side-by-side water outlet pipes are arranged in a staggered and spaced mode, the first end of each water inlet pipe is connected with the first end of one adjacent water outlet pipe to form a circulation loop, the second end of each water inlet pipe is provided with a water inlet, and the second end of each water outlet pipe is provided with a water outlet;
the liquid cooling plate is located between the single batteries and the battery pack shell.
According to the power battery package of this application, through setting up a plurality of inlet tubes and a plurality of outlet pipe in order to form a plurality of circulation return circuits to promote the homogeneity of the inside temperature of the thermal management system of power battery package, also promoted the heat exchange efficiency of power battery package.
According to the power battery package of an embodiment of this application, the interval between inlet tube and the adjacent outlet pipe is L1, the width of the face of battery cell with the liquid cooling plate contact is L2, wherein L1 < L2.
According to the power battery pack of an embodiment of the application, each water inlet pipe is in contact with at least two single batteries.
According to the power battery pack of one embodiment of the application, each water outlet pipe is in contact with at least two single batteries.
According to a power battery package of an embodiment of this application, for every the circulation return circuit, the temperature of the entrance point of inlet tube is T1, the temperature of the exit end of inlet tube is T5, the temperature of the middle part of inlet tube is T3, the temperature of the entrance point of outlet pipe is T6, the temperature of the exit end of outlet pipe is T2, the temperature of the middle part of outlet pipe is T4, satisfies: the difference between any two of T1+ T2, T3+ T4, and T5+ T6 is less than or equal to 4 ℃.
According to power battery package of an embodiment of this application, the thermal management system includes: the adapter tube comprises a plurality of sections of connecting channels which are mutually separated, and one end of the water inlet tube and one end of the adjacent water outlet tube are communicated through the connecting channels and form a circulation loop.
According to this application power battery package of an embodiment, the adapter tube includes: the adapter tube body with locate the baffle in the adapter tube body, the baffle will the adapter tube body is cut apart into a plurality of linking ways that separate each other.
According to power battery package of an embodiment of this application, the battery can casing includes: the tray comprises a bottom plate and a side frame; the upper cover and the bottom plate are respectively connected with the upper end and the lower end of the side frame to limit a battery accommodating cavity; a plurality of battery cells, a plurality of battery cell sets up and holds the chamber at the battery.
According to an embodiment of the application, the power battery pack is characterized in that the liquid cooling plate is located between the plurality of single batteries and the upper cover.
According to power battery package of an embodiment of this application, characterized in that, the liquid cooling plate is located between a plurality of battery cells and bottom plate.
According to the power battery pack of one embodiment of the application, the surface of one side, close to the upper cover, of each single battery is provided with the heat conduction insulating layer.
According to the power battery pack of one embodiment of the application, the surface of one side, close to the bottom plate, of each single battery is provided with the heat conduction insulating layer.
According to the power battery pack of one embodiment of the application, the upper cover and the bottom plate are both made of aluminum alloy materials;
according to power battery package of an embodiment of this application, the battery cell is the square battery of cuboid structure to have length, thickness and be in the height between length and thickness, it is a plurality of battery cell arranges along battery cell's thickness direction.
The application also provides a vehicle, the vehicle is provided with the power battery pack according to any one of the embodiments of the application.
The vehicle and the power battery pack have the same advantages compared with the prior art, and the detailed description is omitted.
Additional aspects and advantages of the present application 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 present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the structure of an inlet pipe and an outlet pipe according to one embodiment of the present application;
FIG. 2 is a schematic structural diagram of a power battery pack according to an embodiment of the present application;
fig. 3 and 4 are assembly views of a tray, an upper cover, and a unit battery according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of a vehicle according to one embodiment of the present application.
Reference numerals:
a vehicle 1000;
a power battery pack 100; a tray 11; an upper cover 12; an end plate 13;
a single battery 1;
a thermal management system 2; a water inlet pipe 21; a water inlet 211; a water outlet pipe 22; a water outlet 221; an adapter tube 23; the adapter tube 231; a partition 232; a liquid-cooled plate 24;
a thermally conductive and insulating layer 3.
Detailed Description
Reference will now be made in detail to embodiments of the present application, 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 drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
A power battery pack 100 according to an embodiment of the present application is described below with reference to fig. 1 to 5.
The power battery pack 100 according to the embodiment of the application includes: a plurality of unit batteries 1; a plurality of unit batteries 1 disposed in the battery can body; the heat management system 2 comprises a liquid cooling plate 24, the liquid cooling plate 24 is used for exchanging heat with the single battery 1, the liquid cooling plate 24 is provided with a plurality of water inlet pipes 21 arranged side by side and a plurality of water outlet pipes 22 arranged side by side, the water inlet pipes 21 and the water outlet pipes 22 are arranged in a staggered and spaced mode one by one, the first end of each water inlet pipe 21 is connected with the first end of one adjacent water outlet pipe 22 to form a circulation loop, the second end of each water inlet pipe 21 is provided with a water inlet 211, and the second end of each water outlet pipe 22 is provided with a water outlet 221; the liquid cooling plate 24 is located between the plurality of unit batteries 1 and the battery pack case.
From this, cooling medium can get into a plurality of circulation return circuits respectively from a plurality of inlet tubes 21 respectively to flow out from a plurality of outlet pipes 22 respectively, thereby it has cooling medium to flow through in the first circulation return circuit on the messenger liquid cooling board 24, makes a plurality of battery cells 1 that contact liquid cooling board 24 can carry out the heat transfer through a plurality of circulation return circuits.
Set up a plurality of circulation return circuits on liquid cooling plate 24, a plurality of circulation return circuits can be arranged at interval on liquid cooling plate 24, and the setting of a plurality of circulation return circuits can make the length of single circulation return circuit shorter to shorten coolant's circulation route, the coolant's of water inlet and delivery port department temperature difference is less, thereby promotes the homogeneity of the inside temperature of thermal management system 2, improves thermal management system 2's heat exchange efficiency.
According to power battery package 100 of this application, through setting up a plurality of inlet tubes 21 and a plurality of outlet pipe 22 in order to form a plurality of circulation return circuits to promote the homogeneity of the inside temperature of thermal management system 2 of power battery package 100, also promoted power battery package 100's heat exchange efficiency.
Some embodiments of a power battery pack 100 according to the present application are described below with reference to fig. 1-5.
As shown in fig. 2, according to the power battery pack 100 of an embodiment of the present application, the distance between the water inlet pipe 21 and the adjacent water outlet pipe 22 is L1, for example, in fig. 2, L1 is the distance between the adjacent water inlet pipe 21 and the adjacent water outlet pipe 22, and the width of the surface of the single battery 1 contacting the liquid cooling plate 24 is L2, which satisfies: l1 < L2, from this, can guarantee that inlet tube 21 and outlet pipe 22 all contact has battery cell 1, and at the battery cell 1 of the interval direction's of inlet tube 21 and outlet pipe 22 space department, also have inlet tube 21 or outlet pipe 22 to contact with it to guarantee that thermal management system 2 can all effectively the heat transfer to a plurality of battery cells 1. In some examples, as shown in fig. 2, the length direction of the single battery 1 may be the same as the extending direction of the water inlet pipe 21 and the water outlet pipe 22, that is, the water inlet pipe 21 or the water outlet pipe 22 is the same as the length direction of the single battery 1, L1 is the separation distance between the water inlet pipe 21 and the water outlet pipe 22, and L2 is the thickness of the single battery.
As shown in fig. 2, according to the power battery pack 100 of an embodiment of the present application, each water inlet pipe 21 is in contact with at least two unit batteries 1 and/or each water outlet pipe 22 is in contact with at least two unit batteries 1 (e.g., two), so that the coverage of each water inlet pipe 21 or each water outlet pipe 22 can be increased, and thus the heat exchange efficiency of each circulation loop can be improved.
In some examples, as shown in fig. 2, each inlet pipe 21 is in contact with two unit cells 1, and each outlet pipe is in contact with two unit cells 1.
According to the power battery pack 100 of one embodiment of the present application, for each circulation loop, the temperature of the inlet end of the water inlet pipe 21 is T1, the temperature of the outlet end of the water inlet pipe 21 is T5, the temperature of the middle part of the water inlet pipe 21 is T3, the temperature of the inlet end of the water outlet pipe 22 is T6, the temperature of the outlet end of the water outlet pipe 22 is T2, and the temperature of the middle part of the water outlet pipe 22 is T4, which satisfy the following conditions: any two of T1+ T2, T3+ T4, and T5+ T6 differ by less than or equal to 4 ℃, whereby the uniformity of the temperature inside the flow-through circuit can be enhanced.
According to the power battery pack 100 of an embodiment of the present application, the thermal management system 2 includes: the adapter pipe 23, the adapter pipe 23 includes the connecting channel that the multistage separates each other, the first end of inlet tube 21 and the first end of an adjacent outlet pipe 22 are through connecting channel intercommunication and form the circulation return circuit, therefore, realize inlet tube 21 and outlet pipe 22 one-to-one through setting up of adapter pipe 23, and only need to separate one adapter pipe 23 through the multistage each other and can form many each connecting channel, in order to supply multiunit inlet tube 21 and outlet pipe 22 to adopt, moreover, the steam generator is simple in structure, and the convenience is provided.
As shown in fig. 1, according to the power battery pack 100 of an embodiment of the present application, the adapter tube 23 includes: the adapter tube 231 and the partition 232 provided in the adapter tube 231, wherein the partition 232 divides the adapter tube 231 into a plurality of mutually separated connection passages. The partition 232 is convenient to set up, and can realize a plurality of connecting channels through simple structure through the setting of partition 232 with the switching body 231 to can reduce the design and manufacturing cost of power battery package 100.
According to the power battery pack 100 of one embodiment of the present application, the battery pack case is made of a metal material; the single batteries 1 are multiple, each single battery 1 is provided with a battery shell, an electric core arranged in the battery shell and a leading-out terminal which is connected with the electric core and extends out of the battery shell, the single battery 1 is arranged in the battery shell, and a heat conduction insulating layer wrapping the single battery 1 is filled in the battery shell.
According to one embodiment of the application, a plurality of single batteries 1 are arranged in a battery pack shell, a liquid cooling plate 24 is arranged between the plurality of single batteries 1 and the battery pack shell, and the liquid cooling plate is in direct contact with the single batteries 1.
According to another embodiment of the present application, the battery pack case includes: a tray 11 and an upper cover 12, wherein the tray comprises a bottom plate and a side frame; the upper cover 12 and the bottom plate 112 are respectively connected with the upper end and the lower end of the side frame 111 to define a battery accommodating cavity; a plurality of single batteries 1, a plurality of single batteries 1 set up in the battery accommodation chamber.
According to the embodiment of the application, the side frame is a square frame, the bottom plate is fixedly connected with the bottom surface of the side frame, and in some embodiments, the bottom plate is fixedly connected with the bottom surface of the side frame through welding.
According to the embodiment of the present application, the liquid cooling plate 24 is disposed between the plurality of unit batteries 1 and the upper cover 12.
According to the specific embodiment of the present application, the liquid cooling plate 24 is disposed between the plurality of unit batteries 1 and the base plate 112.
According to the specific embodiment of the present application, the liquid cooling plate 24 is simultaneously disposed between the plurality of unit batteries 1 and the upper cover 12 and between the plurality of unit batteries 1 and the base plate 112.
In the above embodiment, the liquid-cooled plate 24 may be directly in contact with the plurality of unit batteries 1 to perform heat exchange.
According to the specific embodiment of the present application, the liquid cooling plate 24 is disposed between the plurality of unit batteries 1 and the upper cover 12, and one side surface of the unit batteries 1 close to the upper cover 12 is provided with the heat conducting insulating layer 3.
According to the specific embodiment of the present application, the liquid cooling plate 24 is disposed between the plurality of unit batteries 1 and the base plate 112, and a side surface of the unit battery 1 close to the base plate 112 is provided with the heat conducting insulating layer 3.
According to the specific embodiment of the present application, the liquid cooling plate 24 is simultaneously disposed between the plurality of unit batteries 1 and the upper cover 12 and the plurality of unit batteries 1 and the bottom plate 112, and the heat conductive insulating layer 3 is disposed on at least one of a side surface of the unit battery 1 close to the upper cover 12 and a side surface of the unit battery 1 close to the bottom plate 112.
In the above embodiment, the liquid cooling plate 24 may be in contact with the thermal insulation layer 3, and the thermal insulation layer may transfer heat of the plurality of unit batteries 1 to the thermal management system 2 and exchange heat with the plurality of circulation loops of the liquid cooling plate 24. The arrangement of the heat conduction insulating layer 3 is favorable for leading out the heat of the single battery.
The application provides a power battery package 100, wherein a plurality of battery cells 1 direct mount have reduced module frame's use in the battery cladding is internal for installation space utilization improves, and 1 quantity of battery cells of the internal installation of battery cladding increases, has improved power battery package 100's battery capacity, has improved duration.
In addition, because a plurality of single batteries 1 are directly arranged in the battery shell body, the single batteries 1 can be more tightly arranged in the battery shell body, the utilization rate of the installation space in the battery shell body is further improved, and the number of the single batteries 1 is increased.
The upper cover 12 and the base plate may be both made of an aluminum alloy material. The aluminum alloy material has good heat-conducting property, small density, light weight and low price.
According to an embodiment of the present application, as shown in fig. 4, the outer sides of the two outermost unit cells 1 in the thickness D direction of the unit cells 1 may be mounted with end plates 13, and the unit cells 1 may be connected to the tray 11 through the end plates 13.
In some embodiments, as shown in fig. 3 and 4, the unit cell 1 is a rectangular cell having a rectangular parallelepiped structure and has a length L, a thickness D, and a height H between the length L and the thickness D, and the plurality of unit cells 1 are arranged in the thickness D direction of the unit cell. Thus, high-density single battery arrangement can be realized in the single battery accommodating cavity.
A vehicle 1000 according to the present application includes a power battery pack 100 according to any of the embodiments of the present application.
The vehicle 1000 according to the present application has corresponding advantages by providing the power battery pack 100 according to the embodiment of the present application, and will not be described herein again.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means 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 application. 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.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. A power battery pack (100), comprising:
a battery pack housing;
a plurality of single batteries (1), the plurality of single batteries (1) being disposed within a battery can body;
the heat management system (2) comprises a liquid cooling plate (24), the liquid cooling plate (24) is provided with a plurality of side-by-side water inlet pipes (21) and a plurality of side-by-side water outlet pipes (22), the plurality of side-by-side water inlet pipes (21) and the plurality of side-by-side water outlet pipes (22) are arranged in a staggered and spaced mode, a first end of each water inlet pipe (21) is connected with a first end of one adjacent water outlet pipe (22) to form a circulation loop, a second end of each water inlet pipe (21) is provided as a water inlet (211), and a second end of each water outlet pipe (22) is provided as a water outlet (221);
the liquid cooling plate (24) is positioned between the single batteries (1) and the battery pack shell.
2. The power battery pack (100) according to claim 1, wherein the distance between the water inlet pipe (21) and the adjacent water outlet pipe (22) is L1, the width of the contact surface of the single battery (1) and the liquid cooling plate (24) is L2, wherein L1 < L2.
3. The power battery pack (100) according to claim 1, wherein each water inlet pipe (21) is in contact with at least two of the single batteries (1).
4. The power battery pack (100) according to claim 1, wherein each outlet pipe (22) is in contact with at least two of the single batteries (1).
5. The power battery pack (100) of claim 1, wherein for each of the circulation loops, the inlet end of the inlet pipe (21) has a temperature of T1, the outlet end of the inlet pipe (21) has a temperature of T5, the middle of the inlet pipe (21) has a temperature of T3, the inlet end of the outlet pipe (22) has a temperature of T6, the outlet end of the outlet pipe (22) has a temperature of T2, and the middle of the outlet pipe (22) has a temperature of T4, so that: the difference between any two of T1+ T2, T3+ T4, and T5+ T6 is less than or equal to 4 ℃.
6. The power battery pack (100) of claim 1, wherein the thermal management system (2) comprises: the adapter tube (23), the adapter tube (23) includes the multistage linking channel that separates each other, the one end of inlet tube (21) and the one end of an adjacent outlet pipe (22) pass through the linking channel intercommunication and form the circulation return circuit.
7. The power battery pack (100) of claim 5, wherein the adapter tube (23) comprises: the connecting pipe comprises a connecting pipe body (231) and a partition plate (232) arranged in the connecting pipe body (231), wherein the partition plate (232) divides the connecting pipe body (231) into a plurality of mutually separated connecting channels.
8. The power battery pack (100) of any of claims 1-7, wherein the battery pack housing comprises:
a tray (11) and an upper cover (12), the tray comprising a bottom plate and side rims; the upper cover (12) and the bottom plate (112) are respectively connected with the upper end and the lower end of the side frame (111) to define a battery accommodating cavity;
the battery pack comprises a plurality of single batteries (1), wherein the single batteries (1) are arranged in a battery accommodating cavity.
9. The power battery pack (100) of claim 8, wherein the liquid cooling plate (24) is located between the plurality of cells (1) and the upper cover (12).
10. The power battery pack (100) of claim 8, wherein the liquid cooling plate (24) is located between the plurality of cells (1) and the base plate (112).
11. The power battery pack (100) according to claim 9, wherein a side surface of the single battery (1) close to the upper cover (12) is provided with a heat conducting insulation layer (3).
12. The power battery pack (100) according to claim 10, wherein one side surface of the single battery (1) close to the bottom plate (112) is provided with a heat conducting and insulating layer (3).
13. The power battery pack (100) according to claim 8, wherein the upper cover (12) and the bottom plate are both made of aluminum alloy material.
14. The power battery pack (100) according to claim 8, wherein the single battery (1) is a rectangular battery with a rectangular parallelepiped structure, and has a length, a thickness and a height between the length and the thickness, and a plurality of single batteries (1) are arranged along the thickness direction of the single batteries.
15. A vehicle (1000) characterized by having a power battery pack (100) according to any one of claims 1-14.
CN201910544880.1A 2019-06-21 2019-06-21 Power battery pack and vehicle with same Active CN112117509B (en)

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Application Number Priority Date Filing Date Title
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CN112117509A true CN112117509A (en) 2020-12-22
CN112117509B CN112117509B (en) 2023-04-07

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