CN117134015A - Power battery temperature regulating system, battery assembly and electric automobile - Google Patents

Power battery temperature regulating system, battery assembly and electric automobile Download PDF

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Publication number
CN117134015A
CN117134015A CN202210604716.7A CN202210604716A CN117134015A CN 117134015 A CN117134015 A CN 117134015A CN 202210604716 A CN202210604716 A CN 202210604716A CN 117134015 A CN117134015 A CN 117134015A
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CN
China
Prior art keywords
temperature
medium
battery
adjusting
regulating
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
CN202210604716.7A
Other languages
Chinese (zh)
Inventor
刘智峰
吴斌
李享
李鹏
唐善政
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.)
Youpao Automotive Technology Shanghai Co Ltd
Original Assignee
Youpao Automotive Technology Shanghai 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 Youpao Automotive Technology Shanghai Co Ltd filed Critical Youpao Automotive Technology Shanghai Co Ltd
Priority to CN202210604716.7A priority Critical patent/CN117134015A/en
Publication of CN117134015A publication Critical patent/CN117134015A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • 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
    • H01M10/615—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
    • H01M10/61—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
    • H01M10/63—Control systems
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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

Abstract

The invention provides a power battery temperature regulating system, a battery assembly and an electric automobile, comprising: an inlet pipeline, an outlet pipeline, a first temperature adjusting part, a second temperature adjusting part, a selection circulation part and a control device of the temperature adjusting medium; the inlet pipeline is respectively connected with the medium inlet of the first temperature regulating part and the medium inlet of the second temperature regulating part through the selection circulating part, and the medium outlet of the first temperature regulating part and the medium outlet of the second temperature regulating part are directly or indirectly connected to the discharge pipeline; the selection circulation part can selectively send the temperature-adjusting medium into the first temperature-adjusting part and/or the second temperature-adjusting part under the control of the control device; the first temperature adjusting part is arranged on the first side of the battery so as to adjust the temperature of the first side of the battery through the temperature adjusting medium entering the first temperature adjusting part, and the second temperature adjusting part is arranged on the second side of the battery so as to adjust the temperature of the second side of the battery through the temperature adjusting medium entering the second temperature adjusting part.

Description

Power battery temperature regulating system, battery assembly and electric automobile
Technical Field
The invention relates to the field of new energy automobiles, in particular to a power battery temperature regulating system, a battery assembly and an electric automobile.
Background
Battery liquid cooling system: and the cooling liquid such as glycol is driven by a water pump to forcedly flow in a cooling pipeline, so as to cool or heat the power battery, wherein the cooling liquid is generally cooled by a whole vehicle air conditioner refrigerating system, and the heating is generally heated by a separate heater or a shared whole vehicle air conditioner system heater.
In the prior art, a cooling plate is generally arranged at the bottom of the battery, the cooling speed is low, meanwhile, the cooling of the battery in the height direction is uneven, and meanwhile, the temperature difference of different sides (such as upper and lower sides) of the battery is relatively large, so that the cycle life of the battery is not facilitated to be prolonged.
Disclosure of Invention
The invention provides a power battery temperature regulating system, a battery assembly and an electric automobile, which are used for solving the problems of low cooling speed, uneven cooling and larger temperature difference at different sides.
According to a first aspect of the present invention, there is provided a power battery temperature regulating system of an electric vehicle, comprising: an inlet pipeline, an outlet pipeline, a first temperature adjusting part, a second temperature adjusting part, a selection circulation part and a control device of the temperature adjusting medium;
the inlet pipeline is respectively connected with the medium inlet of the first temperature regulating part and the medium inlet of the second temperature regulating part through the selection circulating part, and the medium outlet of the first temperature regulating part and the medium outlet of the second temperature regulating part are directly or indirectly connected to the discharge pipeline; the selection flow-through part can selectively send the temperature-adjusting medium into the first temperature-adjusting part and/or the second temperature-adjusting part under the control of the control device;
the first temperature adjusting part is arranged on the first side of the battery so as to adjust the temperature of the first side of the battery through a temperature adjusting medium entering the first temperature adjusting part, and the second temperature adjusting part is arranged on the second side of the battery so as to adjust the temperature of the second side of the battery through a temperature adjusting medium entering the second temperature adjusting part;
the control device is used for:
acquiring first temperature information and second temperature information; the first temperature information is indicative of a temperature of a first side of the battery and the second temperature information is indicative of a temperature of a second side of the battery;
and adjusting the first temperature information and the second temperature information to meet preset requirements through controlling the selection flow part.
Optionally, when the control device adjusts the first temperature information and the second temperature information to meet a preset requirement by controlling the selection flow portion, the control device is specifically configured to:
if the first temperature information and the second temperature information are both larger than a preset first temperature threshold value, controlling the selection circulation part to send a first temperature regulating medium for cooling into the first temperature regulating part and the second temperature regulating part, wherein the temperature of the first temperature regulating medium is lower than the first temperature threshold value;
and if the first temperature information and the second temperature information are smaller than a preset second temperature threshold value, controlling the selection circulation part to send a second temperature-adjusting medium for heating into the first temperature-adjusting part and the second temperature-adjusting part, wherein the temperature of the second temperature-adjusting medium is higher than the second temperature threshold value, and the temperature of the second temperature-adjusting medium is lower than the temperature of the first temperature-adjusting medium.
Optionally, the second temperature adjusting part is arranged on the upper side of the battery, and the first temperature adjusting part is arranged on the lower side of the battery;
the control device is specifically configured to, when the first temperature information and the second temperature information are adjusted to satisfy a preset requirement by controlling the selection flow-through portion:
if the first temperature information is larger than the first temperature threshold value and the second temperature information is smaller than a preset third temperature threshold value, controlling the selection circulation part to send the first temperature regulating medium into the first temperature regulating part and refusing to send the first temperature regulating medium into the second temperature regulating part, wherein the temperature of the first temperature regulating medium is lower than the third temperature threshold value, and the third temperature threshold value is lower than the first temperature threshold value;
if the second temperature information is greater than the first temperature threshold and the first temperature information is less than the third temperature threshold, controlling the selection circulation part to send the first temperature regulating medium into the second temperature regulating part and refusing to send the first temperature regulating medium into the first temperature regulating part;
if the first temperature information is smaller than a preset second temperature threshold value, the second temperature information is larger than a preset fourth temperature threshold value, the selection circulation part is controlled to send the second temperature regulating medium into the first temperature regulating part, and the second temperature regulating medium is refused to be sent into the second temperature regulating part, wherein the temperature of the second temperature regulating medium is higher than the fourth temperature threshold value, and the fourth temperature threshold value is higher than the second temperature threshold value;
if the second temperature information is smaller than the second temperature threshold value and the first temperature information is larger than the fourth temperature threshold value, controlling the selection circulation part to send the second temperature regulating medium into the second temperature regulating part and refusing to send the second temperature regulating medium into the first temperature regulating part;
wherein the temperature of the first tempering medium is below the first temperature threshold; the temperature of the second temperature regulating medium is higher than the second temperature threshold value, and the temperature of the second temperature regulating medium is lower than the temperature of the first temperature regulating medium.
Optionally, if the first temperature information and the second temperature information are both smaller than the third temperature threshold and are both larger than the fourth temperature threshold, the selection circulation portion is controlled to refuse to send the corresponding temperature-adjusting medium into the first temperature-adjusting portion and the second temperature-adjusting portion.
Optionally, the first temperature threshold is in a range of 35 degrees celsius to 45 degrees celsius, and the second temperature threshold is in a range of-2 degrees celsius to-12 degrees celsius.
Optionally, the first temperature adjusting part comprises at least one first liquid cooling plate; the second temperature adjusting part comprises at least one second liquid cooling plate;
if the number of the first liquid cooling plates is a plurality of, the plurality of first liquid cooling plates are connected in series;
if the number of the second liquid cooling plates is plural, the plurality of second liquid cooling plates are connected in series.
Optionally, the selective circulation part comprises an electric control three-way valve controlled by the control device.
Optionally, the medium outlet of the first temperature regulating part is connected with the first one-way valve through a three-way joint to the discharge pipeline; and a medium outlet of the first temperature regulating part is connected with the discharge pipeline through the three-way joint and the second one-way valve.
According to a second aspect of the present invention, there is provided a battery assembly for an electric vehicle, comprising the power battery temperature regulating system of the first aspect and its alternatives, the battery, and a lower housing; the battery is arranged on the lower shell.
According to a third aspect of the present invention, there is provided an electric vehicle including the battery assembly of the second aspect.
In the power battery temperature regulating system, the battery assembly and the electric automobile provided by the invention, the temperature regulating parts (namely the first temperature regulating part and the second temperature regulating part) are arranged at two sides of the battery, compared with the scheme of arranging the temperature regulating parts at one side only, the power battery temperature regulating system and the battery assembly can provide a reliable hardware means for selectively regulating temperature at one side (namely heating or cooling) or regulating temperature at two sides (namely heating or cooling) simultaneously, and on the basis, the scheme of regulating temperature at two sides simultaneously is realized, the speed of regulating temperature can be improved, the scheme of regulating temperature at one side is realized, the temperature difference can be reduced, and the cycle life of the battery is prolonged. Meanwhile, the invention controls temperature adjustment based on the first temperature information and the second temperature information, which can ensure that the temperature adjustment result can be accurately adapted to the actual temperature and flexibly changed.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a power battery temperature control system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a power battery temperature control system according to an embodiment of the present invention;
FIG. 3 is a schematic view of a battery assembly according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of a battery assembly;
FIG. 5 is an enlarged partial view of portion A of FIG. 4;
fig. 6 is a schematic diagram of a battery pack according to an embodiment of the present invention;
FIG. 7 is an enlarged partial view of portion B of FIG. 6;
fig. 8 is a control flow diagram of a control device according to an embodiment of the invention.
Reference numerals illustrate:
1-a first temperature regulating part;
101-a first liquid cooling plate;
2-a second temperature adjusting part;
201-a second liquid cooling plate;
3-entering a pipeline;
4-selecting a flow-through section;
401-an electric control three-way valve;
5-a control device;
6-a discharge line;
7-a first one-way valve;
8-a second one-way valve;
9-a three-way joint;
10-battery;
11-lower housing.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present specification, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower surface", "upper surface", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In the description of the present invention, the meaning of "plurality" means a plurality, for example, two, three, four, etc., unless explicitly specified otherwise.
In the description of the present invention, unless explicitly stated and limited otherwise, the term "coupled" and the like should be construed broadly, and may be, for example, fixedly coupled, detachably coupled, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Referring to fig. 1 to 7, an embodiment of the present invention provides a power battery temperature adjustment system of an electric vehicle, including: an inlet pipeline 3, an outlet pipeline 6, a first temperature adjusting part 1, a second temperature adjusting part 2, a selection circulation part 4 and a control device 5 of the temperature adjusting medium.
The inlet pipeline 3 and the outlet pipeline 6 can be any pipeline capable of realizing the circulation of temperature-adjusting media, and the shape, the position, the size and the like of the pipeline are not changed, so that the embodiment of the invention is not limited, and meanwhile, various valves, detection pieces and the like can be arranged in the inlet pipeline and the outlet pipeline.
The inlet pipeline 3 is respectively connected with the medium inlet of the first temperature regulating part 1 and the medium inlet of the second temperature regulating part 2 through the selective circulation part 4, and the selective circulation part 4 can selectively send the temperature regulating medium into the first temperature regulating part 1 and/or the second temperature regulating part 2 under the control of the control device 5; the medium outlet of the first temperature regulating part 1 and the medium outlet of the second temperature regulating part 2 are directly or indirectly connected to the discharge pipeline 6.
The temperature-adjusting medium can be a first temperature-adjusting medium for cooling or a second temperature-adjusting medium for heating. The temperature adjusting medium may be liquid, gas, water, or other medium suitable for temperature adjustment, such as a cooling liquid such as ethylene glycol. In addition, the first temperature adjusting medium and the second temperature adjusting medium can be made of the same material or different materials.
In some embodiments, the inlet line 3 may be connected to one or more sources of medium, so as to obtain a first temperature-regulating medium and a second temperature-regulating medium.
In one example, the inlet line 3 may be connected to a first medium source of a first tempering medium and a second medium source of a second tempering medium, respectively; when the first medium source is needed, the first temperature regulating medium is introduced, and when the second medium source is needed, the second temperature regulating medium is introduced, the first medium source can form and send out the first temperature regulating medium, and the second medium source can form and send out the second temperature regulating medium;
in another example, the inlet line 3 may also be connected to only one medium source, which can be controlled to form and deliver different tempering media (i.e. either the first tempering medium or the second tempering medium).
In some embodiments, the discharge line 6 may also be connected to a medium source, so that a circulation of the temperature-regulating medium is formed, and the temperature-regulating medium may be cooled or heated after being circulated back to the medium source, so that a corresponding first temperature-regulating medium or second temperature-regulating medium is formed.
In some examples, the cooling capacity of the temperature-adjusting medium at the medium source can be derived from the whole vehicle air-conditioning refrigeration system, for example, heat exchange between the temperature-adjusting medium and the whole vehicle air-conditioning refrigeration system can be realized in the medium source to form a first temperature-adjusting medium with the temperature meeting the requirement, the heating capacity of the temperature-adjusting medium at the medium source to form a second temperature-adjusting medium can be derived from a separate heater or a whole vehicle air-conditioning system heater, for example, heat exchange between the temperature-adjusting medium and the heater can be realized in the medium source to form a second temperature-adjusting medium with the temperature meeting the requirement, and the heater can also be regarded as a part of the medium source.
The medium source may for example comprise a heat exchanger, as well as various connection lines for performing the function of the heat exchanger.
The selective circulation portion 4 may be any component or combination of components capable of realizing selective circulation and controlled by the control device 5, in one example, please refer to fig. 2 to 7, the selective circulation portion 4 includes an electronically controlled three-way valve 41 controlled by the control device, in another example, the selective circulation portion 4 may also include a first solenoid valve, a second solenoid valve and a three-way pipe, a first communication port of the three-way pipe is connected to the inlet pipeline 3, a second communication port of the three-way pipe is connected to the first temperature adjusting portion through the first solenoid valve, a third communication port of the three-way pipe is connected to the second temperature adjusting portion through the second solenoid valve, and the two solenoid valves may be controlled by the control device.
In the embodiment of the present invention, the first temperature adjusting portion 1 is disposed on a first side of the battery 10 to adjust the temperature of the first side of the battery 10 by a temperature adjusting medium (e.g., a first temperature adjusting medium, a second temperature adjusting medium) entering the first temperature adjusting portion 1, and the second temperature adjusting portion 2 is disposed on a second side of the battery 10 to adjust the temperature of the second side of the battery 10 by a temperature adjusting medium (e.g., a first temperature adjusting medium, a second temperature adjusting medium) entering the second temperature adjusting portion 2.
The first side and the second side of the battery 10 may be opposite sides, and in other examples, the first side and the second side of the battery 10 may be adjacent sides.
In the examples shown in fig. 2 to 7, the first side of the battery 10 refers to the lower side of the battery, and the second side of the battery 10 refers to the upper side of the battery, but in other examples, the definition is not limited thereto.
In one embodiment, referring to fig. 3 to 7, the first temperature adjusting portion 1 includes at least one first liquid cooling plate 101; the second temperature adjusting part 2 comprises at least one second liquid cooling plate 201;
the liquid cooling plate may be any plate-like member through which a liquid temperature-adjusting medium can pass.
In some examples, the number of the first liquid cooling plates 101 and the second liquid cooling plates 201 is one, the second liquid cooling plates 201 and the first liquid cooling plates 101 are respectively arranged on the upper end face and the lower end face of the battery 10, and the second liquid cooling plates 201 and the first liquid cooling plates 101 are arranged in parallel.
In another example, if the number of the first liquid cooling plates is plural, the plural first liquid cooling plates are connected in series; if the number of the second liquid cooling plates is plural, the plurality of second liquid cooling plates are connected in series.
The first liquid cooling plate 101 and the second liquid cooling plate 201 can be integrated into one piece type liquid cooling plates respectively, and the cooling plate process form can be extrusion harmonica type cold plate or brazing cold plate, and compared with a plurality of split type cold plates of tradition series connection or parallel connection combination, part quantity is fewer, and system reliability is higher.
In one embodiment, a medium outlet of the first temperature adjusting part 1 (for example, the first liquid cooling plate 101) is connected with the first check valve 7 through a three-way joint 9 to the discharge pipeline 6; the medium outlet of the first temperature regulating part 1 is connected with the discharge pipeline 6 through the three-way joint 9 and the second one-way valve 8.
The first one-way valve 7 can be understood as: a component or a combination of components suitable for preventing the return of the tempering medium from the discharge line 6 to the first tempering portion, wherein the second non-return valve 8 may be understood as: a component or a combination of components adapted to preventing the return of the tempering medium from the discharge line 6 to the second tempering portion.
By the first check valve 7 and the second check valve 8, abnormal coolant flows such as backflow or turbulence can be prevented from being formed in the cooling system in different operation modes.
The battery 10 may be a single-layer battery system formed by combining a plurality of battery modules in the transverse direction/longitudinal direction or a single-layer battery system formed by combining a plurality of single battery cells in the transverse direction/longitudinal direction, and the upper end face and the lower end face of the battery are both planes.
The embodiment of the invention also provides a battery assembly of an electric automobile, which comprises the power battery temperature regulating system, the battery 10 and the lower shell 11. The battery 10 is provided in the lower case 11.
In a specific example, the battery 10 is mounted in the lower housing 11, the first liquid cooling plate 101 is disposed between the upper surface of the lower housing 11 and the lower end surface of the battery 10, the second liquid cooling plate 201 is disposed on the upper end surface of the battery 10, and the inlet pipe, the electric control three-way valve, the first one-way valve 7, the second one-way valve 8, the three-way joint 9 (for example, a T-shaped joint) and the discharge pipe 6 are disposed between the side surface of the battery 10 and the inner side of the lower housing 11.
The battery pack inside of the inlet pipeline is connected with the inlet of the electric control three-way valve, and two outlets of the electric control three-way valve 401 are respectively connected with the inlets of the first liquid cooling plate 101 and the second liquid cooling plate 201. The electric control three-way valve comprises two outlets, namely an outlet 1 and an outlet 2, and further, four working modes can be realized by receiving an electric signal of a whole vehicle thermal management control system (namely a control device): both outlet 1 and outlet 2 are open; outlet 1 is open and outlet 2 is closed; outlet 1 is closed and outlet 2 is open; both outlet 1 and outlet 2 are closed.
When the system works, temperature-adjusting medium can enter the electric control three-way valve 401 through the inlet pipeline 3, then can be distributed to the first liquid cooling plate 101 and/or the second liquid cooling plate 201 according to different working modes of the electric control three-way valve 401, and cooling liquid passing through the first liquid cooling plate 101 and/or the second liquid cooling plate 201 respectively passes through the first one-way valve 7 and/or the second one-way valve 8, is converged to the discharge pipeline through the T-shaped connector, and finally flows out of the battery pack through the discharge pipeline. Through the circulation flow of the cooling liquid, the function of cooling the upper end and/or the lower end of the battery is realized.
By controlling the on-off of the two outlets through the electric control three-way valve, taking fig. 8 as an example, the whole system can realize four working modes:
mode 1: the first liquid cooling plate works, and the second liquid cooling plate works;
mode 2: the first liquid cooling plate works, and the second liquid cooling plate does not work;
mode 3: the first liquid cooling plate does not work, and the second liquid cooling plate works;
mode 4; the first liquid cooling plate does not work, and the second liquid cooling plate works.
The control device is used for:
acquiring first temperature information and second temperature information; the first temperature information is indicative of a temperature of a first side of the battery and the second temperature information is indicative of a temperature of a second side of the battery;
and adjusting the first temperature information and the second temperature information to meet preset requirements through controlling the selection flow part.
For further example, referring to fig. 8, the first temperature information may be characterized as T, the second temperature information may be characterized as T, the corresponding first temperature threshold may be represented as T1, the second temperature threshold may be represented as T2, the third temperature threshold may be represented as T3, and the fourth temperature threshold may be represented as T4.
The control device is specifically configured to, when the first temperature information and the second temperature information are adjusted to satisfy a preset requirement by controlling the selection flow-through portion:
if the first temperature information and the second temperature information are both greater than a preset first temperature threshold (i.e. under T > T1, over T > T1), controlling the selection circulation portion to send a first temperature-adjusting medium for cooling into the first temperature-adjusting portion and the second temperature-adjusting portion, and at this time, entering a mode 1, wherein the temperature of the first temperature-adjusting medium is lower than the first temperature threshold;
if the first temperature information and the second temperature information are both smaller than a preset second temperature threshold (i.e. tsw < T2, tsgo < T2), the selection circulation portion is controlled to send a second temperature adjusting medium for heating into the first temperature adjusting portion and the second temperature adjusting portion, and at this time, mode 1 is entered, the temperature of the second temperature adjusting medium is higher than the second temperature threshold, and the temperature of the second temperature adjusting medium is lower than the temperature of the first temperature adjusting medium.
Through cooling, heating under mode 1, can carry out cooling, heating from the both sides of battery, and then:
when the device is applied to heating, due to the arrangement of the parallel liquid cooling plates, the two sides (such as the upper end face and the lower end face) of the battery can be heated at a large flow rate, the temperature difference of cooling liquid at the inlet and the outlet of each liquid cooling plate is large, the heat exchange amount is large, the heating power is high, and the faster heating rate can be realized, so that the low-temperature hot car time of the whole car is shortened;
when the cooling device is applied to cooling, after receiving signals of the control device, the cooling device can realize large-flow cooling on two sides (such as upper and lower end faces) of the battery at the same time, and due to arrangement of the parallel liquid cooling plates, the temperature difference of cooling liquid at the inlet and outlet of each liquid cooling plate is large, the heat exchange quantity is large, the cooling power is high, the upper and lower end faces of the battery can be heated at the same time, meanwhile, the upper and lower end faces of the battery can be rapidly cooled at large flow, the heat diffusion time after thermal runaway of the battery can be prolonged, and the cooling device is safer.
In some examples, the control device is specifically configured to, when the first temperature information and the second temperature information are adjusted to meet a preset requirement by controlling the selection flow portion:
if the first temperature information is greater than the first temperature threshold, the second temperature information is less than a preset third temperature threshold (i.e. tset > T1, tset < T3), then controlling the selection circulation portion to send the first temperature adjusting medium into the first temperature adjusting portion, and refusing to send the first temperature adjusting medium into the second temperature adjusting portion, i.e. entering a mode 2, wherein the temperature of the first temperature adjusting medium is lower than the third temperature threshold, and the third temperature threshold is lower than the first temperature threshold;
if the second temperature information is greater than the first temperature threshold, and the first temperature information is less than the third temperature threshold (i.e. tAN_SNer > T1, tAN_SNer < T3), controlling the selection flow-through part to send the first temperature-adjusting medium into the second temperature-adjusting part, and refusing to send the first temperature-adjusting medium into the first temperature-adjusting part, namely entering a mode 3;
if the first temperature information is smaller than a preset second temperature threshold, the second temperature information is larger than a preset fourth temperature threshold (namely, tlower is smaller than T2 and Tupper is larger than T4), the selection circulation part is controlled to send the second temperature regulating medium into the first temperature regulating part, and the second temperature regulating medium is refused to be sent into the second temperature regulating part, namely, the mode 2 is entered, the temperature of the second temperature regulating medium is higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the second temperature threshold;
if the second temperature information is smaller than the second temperature threshold, the first temperature information is larger than the fourth temperature threshold (i.e. T < T2, T > T4), controlling the selection flow-through part to send the second temperature-adjusting medium into the second temperature-adjusting part, and refusing to send the second temperature-adjusting medium into the first temperature-adjusting part, namely entering a mode 3;
wherein the temperature of the first tempering medium is below the first temperature threshold; the temperature of the second temperature regulating medium is higher than the second temperature threshold value, and the temperature of the second temperature regulating medium is lower than the temperature of the first temperature regulating medium.
In the scheme, through simple control logic and combination of the liquid cooling plates with the upper end face and the lower end face arranged in parallel, different cooling schemes of the upper end face and the lower end face of the battery are provided for different working conditions, so that the battery can be always maintained in an optimal working temperature range, and the cycle life of the battery can be effectively prolonged;
in some examples, if the first temperature information and the second temperature information are both smaller than the third temperature threshold and are both larger than the fourth temperature threshold, the selection flow-through portion is controlled to refuse to send the corresponding temperature-adjusting medium into the first temperature-adjusting portion and the second temperature-adjusting portion.
Namely: mode 4 is entered when T4 < T3 and T4 < T3.
The first temperature threshold T1 is in a range of 35 to 45 degrees celsius, for example, 40 degrees celsius, and the second temperature threshold T2 is in a range of-2 to-12 degrees celsius, for example, 7 degrees celsius.
Corresponding to the first temperature threshold T1 and the second temperature threshold T2, T3 may take 38 ℃ if t1=40 ℃, and T4 may take-5 ℃ if t2= -7 ℃.
In one embodiment, in conjunction with fig. 8, there are:
when the temperature under T is more than 40 ℃ and the temperature on T is more than 40 ℃ (namely when the temperature on T is more than T1 and the temperature under T is more than T1), the battery cooling system is in a cooling cycle, the first liquid cooling plate 101 and the second liquid cooling plate 201 work simultaneously, and the battery is rapidly cooled, and then the battery cooling system is in a mode 1;
when the temperature under T is more than 40 ℃ and the temperature above T is less than 38 ℃ (namely, the temperature above T is less than T3 and the temperature below T is more than T1), the battery cooling system is in a cooling cycle, the first liquid cooling plate 101 works, the second liquid cooling plate 201 does not work, at the moment, the system is in a mode 2, the system independently cools the lower end face of the battery, and the temperature difference of the battery is quickly balanced; when (when)
When the temperature T is lower than 38 ℃ and the temperature T is higher than 40 ℃ (namely, when the temperature T is lower than T3 and the temperature T is higher than T1), the battery cooling system is in a cooling cycle, the first liquid cooling plate 101 does not work, the second liquid cooling plate 201 works, namely, in a mode 3, the system independently cools the upper end face of the battery, and the temperature difference of the battery is quickly balanced;
when T is lower than 38 ℃, T is higher than 38 ℃ (i.e. T is lower than T3, T is higher than T3), the battery cooling system is in a cooling cycle, but neither the first liquid cooling plate 101 nor the second liquid cooling plate 201 is operated, and the cooling system is in a silent standby state, i.e. in mode 4.
When the vehicle is in a low-temperature environment, the following steps are:
when the temperature is below T-5 ℃ and above T-5 ℃ respectively (namely, T-below > T4 and T-above > T4), the battery cooling system is in a cooling cycle, but neither the first liquid cooling plate 101 nor the second liquid cooling plate 201 works, and the cooling system is in a silent standby state, namely, in a mode 4;
when the temperature is minus 5 ℃ and the temperature is plus minus 7 ℃ respectively (namely, the temperature is minus T4 and the temperature is plus T2), the battery cooling system is in a heating cycle, the first liquid cooling plate 101 does not work, the second liquid cooling plate 201 works, namely, in a mode 3, the system independently heats the upper end of the battery, and the temperature difference of the battery is quickly balanced;
when the temperature T is minus 7 ℃ and the temperature T is above-5 ℃ (namely, the temperature T is lower than T2 and the temperature T is above T4), the battery cooling system is in a heating cycle, the first liquid cooling plate 101 works, the second liquid cooling plate 201 does not work, namely, the battery cooling system is in a mode 2, and the system independently heats the lower end of the battery and rapidly balances the temperature difference of the battery;
when the temperature T is below < -7 ℃, the temperature T is above < -7 ℃ (namely, the temperature T is below < T2, the temperature T is above < T2), the battery cooling system is in a heating cycle, the first liquid cooling plate 101 and the second liquid cooling plate 201 work simultaneously, namely, in a mode 1, the battery is heated rapidly, and the battery enters an optimal working temperature interval as soon as possible.
An embodiment of the present invention provides an electric vehicle including the above-mentioned battery assembly.
In the description of the present specification, the descriptions of the terms "one embodiment," "an embodiment," "a particular implementation," "an example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. A power battery temperature regulating system of an electric vehicle, comprising: an inlet pipeline, an outlet pipeline, a first temperature adjusting part, a second temperature adjusting part, a selection circulation part and a control device of the temperature adjusting medium;
the inlet pipeline is respectively connected with the medium inlet of the first temperature regulating part and the medium inlet of the second temperature regulating part through the selection circulating part, and the medium outlet of the first temperature regulating part and the medium outlet of the second temperature regulating part are directly or indirectly connected to the discharge pipeline; the selection circulation part can selectively send the temperature-adjusting medium into the first temperature-adjusting part and/or the second temperature-adjusting part under the control of the control device;
the first temperature adjusting part is arranged on the first side of the battery so as to adjust the temperature of the first side of the battery through a temperature adjusting medium entering the first temperature adjusting part, and the second temperature adjusting part is arranged on the second side of the battery so as to adjust the temperature of the second side of the battery through a temperature adjusting medium entering the second temperature adjusting part;
the control device is used for:
acquiring first temperature information and second temperature information; the first temperature information is indicative of a temperature of a first side of the battery and the second temperature information is indicative of a temperature of a second side of the battery;
and adjusting the first temperature information and the second temperature information to meet preset requirements through controlling the selection flow part.
2. The power cell temperature regulating system according to claim 1, wherein,
the control device is specifically configured to, when the first temperature information and the second temperature information are adjusted to satisfy a preset requirement by controlling the selection flow-through portion:
if the first temperature information and the second temperature information are both larger than a preset first temperature threshold value, controlling the selection circulation part to send a first temperature regulating medium for cooling into the first temperature regulating part and the second temperature regulating part, wherein the temperature of the first temperature regulating medium is lower than the first temperature threshold value;
and if the first temperature information and the second temperature information are smaller than a preset second temperature threshold value, controlling the selection circulation part to send a second temperature-adjusting medium for heating into the first temperature-adjusting part and the second temperature-adjusting part, wherein the temperature of the second temperature-adjusting medium is higher than the second temperature threshold value, and the temperature of the second temperature-adjusting medium is lower than the temperature of the first temperature-adjusting medium.
3. The power battery temperature adjustment system according to claim 1, wherein the second temperature adjustment portion is provided on an upper side of the battery, and the first temperature adjustment portion is provided on a lower side of the battery;
the control device is specifically configured to, when the first temperature information and the second temperature information are adjusted to satisfy a preset requirement by controlling the selection flow-through portion:
if the first temperature information is larger than the first temperature threshold value and the second temperature information is smaller than a preset third temperature threshold value, controlling the selection circulation part to send the first temperature regulating medium into the first temperature regulating part and refusing to send the first temperature regulating medium into the second temperature regulating part, wherein the temperature of the first temperature regulating medium is lower than the third temperature threshold value, and the third temperature threshold value is lower than the first temperature threshold value;
if the second temperature information is greater than the first temperature threshold and the first temperature information is less than the third temperature threshold, controlling the selection circulation part to send the first temperature regulating medium into the second temperature regulating part and refusing to send the first temperature regulating medium into the first temperature regulating part;
if the first temperature information is smaller than a preset second temperature threshold value, the second temperature information is larger than a preset fourth temperature threshold value, the selection circulation part is controlled to send the second temperature regulating medium into the first temperature regulating part, and the second temperature regulating medium is refused to be sent into the second temperature regulating part, wherein the temperature of the second temperature regulating medium is higher than the fourth temperature threshold value, and the fourth temperature threshold value is higher than the second temperature threshold value;
if the second temperature information is smaller than the second temperature threshold value and the first temperature information is larger than the fourth temperature threshold value, controlling the selection circulation part to send the second temperature regulating medium into the second temperature regulating part and refusing to send the second temperature regulating medium into the first temperature regulating part;
wherein the temperature of the first tempering medium is below the first temperature threshold; the temperature of the second temperature regulating medium is higher than the second temperature threshold value, and the temperature of the second temperature regulating medium is lower than the temperature of the first temperature regulating medium.
4. The power cell temperature regulating system according to claim 3, wherein,
and if the first temperature information and the second temperature information are smaller than the third temperature threshold and larger than the fourth temperature threshold, controlling the selection circulation part to refuse to send the corresponding temperature regulating medium into the first temperature regulating part and the second temperature regulating part.
5. The power cell attemperation system of any of claims 2-4, wherein said first temperature threshold is in a range of 35 degrees celsius to 45 degrees celsius and said second temperature threshold is in a range of-2 degrees celsius to-12 degrees celsius.
6. The power cell attemperation system of any of claims 1-4, wherein said first attemperation section comprises at least one first liquid cooling plate; the second temperature adjusting part comprises at least one second liquid cooling plate;
if the number of the first liquid cooling plates is a plurality of, the plurality of first liquid cooling plates are connected in series;
if the number of the second liquid cooling plates is plural, the plurality of second liquid cooling plates are connected in series.
7. The power cell attemperation system of any of claims 1-4, wherein said selection flow-through portion comprises an electronically controlled three-way valve controlled by said control device.
8. The power battery temperature regulating system according to any one of claims 1 to 4, wherein a medium outlet of the first temperature regulating portion is connected to the discharge line through a three-way joint and a first check valve; and a medium outlet of the first temperature regulating part is connected with the discharge pipeline through the three-way joint and the second one-way valve.
9. A battery assembly of an electric vehicle, characterized by comprising the power battery temperature regulating system according to any one of claims 1 to 8, the battery, and a lower case; the battery is arranged on the lower shell.
10. An electric vehicle comprising the battery assembly of claim 9.
CN202210604716.7A 2022-05-18 2022-05-18 Power battery temperature regulating system, battery assembly and electric automobile Pending CN117134015A (en)

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Application Number Priority Date Filing Date Title
CN202210604716.7A CN117134015A (en) 2022-05-18 2022-05-18 Power battery temperature regulating system, battery assembly and electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210604716.7A CN117134015A (en) 2022-05-18 2022-05-18 Power battery temperature regulating system, battery assembly and electric automobile

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117458041A (en) * 2023-12-22 2024-01-26 合众新能源汽车股份有限公司 Temperature regulation method, system, vehicle and equipment for power battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117458041A (en) * 2023-12-22 2024-01-26 合众新能源汽车股份有限公司 Temperature regulation method, system, vehicle and equipment for power battery
CN117458041B (en) * 2023-12-22 2024-03-22 合众新能源汽车股份有限公司 Temperature regulation method, system, vehicle and equipment for power battery

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