CN115312953B - Power battery assembly, thermal management control method thereof and electric vehicle - Google Patents
Power battery assembly, thermal management control method thereof and electric vehicle Download PDFInfo
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- CN115312953B CN115312953B CN202211204712.6A CN202211204712A CN115312953B CN 115312953 B CN115312953 B CN 115312953B CN 202211204712 A CN202211204712 A CN 202211204712A CN 115312953 B CN115312953 B CN 115312953B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- 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
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- Automation & Control Theory (AREA)
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Abstract
The invention provides a power battery assembly, a thermal management control method thereof and an electric vehicle, wherein the power battery assembly comprises: energy storage unit, energy storage unit includes box down, the box includes vertical boundary beam and horizontal boundary beam down, horizontal boundary beam is connected with a plurality of stiffening beams, a plurality of stiffening beams set up along the width direction interval of box down, form first accommodation space between stiffening beam and the vertical boundary beam adjacent with vertical boundary beam in a plurality of stiffening beams, form the second accommodation space between two adjacent stiffening beams in a plurality of stiffening beams, first accommodation space and second accommodation space are used for holding electric core. The longitudinal edge beam and the stiffening beam can both heat the battery core, so that the heating efficiency of the battery is effectively improved, the charging efficiency of the battery in a low-temperature environment is improved, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a power battery assembly, a thermal management control method of the power battery assembly and an electric vehicle.
Background
With the development of electric automobiles, users have higher and higher requirements on the endurance mileage of the whole automobile, and higher requirements on the charging speed of a battery are also provided. In order to meet the requirement that users can quickly supplement energy at various environmental temperatures, the requirement on battery thermal management is more strict. The conventional whole electric automobile is generally provided with a whole automobile power distribution unit and DCDC arranged at the position of a front engine room of the whole automobile, and the whole automobile has the problems of large weight, low space utilization rate and high-low voltage wiring harness factories. Meanwhile, the conventional power battery generally has the problem of low charging efficiency in a low-temperature environment.
Disclosure of Invention
The invention mainly aims to provide a power battery assembly, a thermal management control method thereof and an electric vehicle, and aims to solve the problem of low charging efficiency of a power battery in a low-temperature environment in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a power battery assembly including: energy storage unit, energy storage unit includes box down, the box includes vertical boundary beam and horizontal boundary beam down, horizontal boundary beam is connected with a plurality of stiffening beams, a plurality of stiffening beams set up along the width direction interval of box down, form first accommodation space between stiffening beam and the vertical boundary beam adjacent with vertical boundary beam in a plurality of stiffening beams, form the second accommodation space between two adjacent stiffening beams in a plurality of stiffening beams, first accommodation space and second accommodation space are used for holding electric core.
Furthermore, PTC heating sheets are arranged between the longitudinal edge beam and the battery core and between the reinforcing beam and the battery core, a liquid cooling plate is further arranged at the bottom of the lower box body, and a liquid cooling flow channel is arranged inside the liquid cooling plate.
Further, all have the gapped ground setting between electric core and vertical boundary beam, the stiffening beam, all fill in the clearance and have the casting glue, PTC generates heat the piece and passes through casting glue and electric core contact.
Further, vertical boundary beam is the section bar structure, and vertical boundary beam is provided with first PTC die cavity structure towards one side of electric core, is provided with PTC piece that generates heat in the first PTC die cavity structure, and first PTC die cavity structure passes through the casting glue and contacts with electric core.
Furthermore, the stiffening beam is of a profile structure, a second PTC (positive temperature coefficient) cavity structure is arranged on one side, facing the battery core, of the stiffening beam, a PTC heating sheet is arranged in the second PTC cavity structure, and the second PTC cavity structure is in contact with the battery core through pouring sealant.
Further, the power battery assembly still includes: the energy distribution unit is connected with the energy storage unit through the electric connection unit and is connected with the PTC heating sheet through the high-voltage wire harness; and the control unit is connected with the energy storage unit through a low-voltage connecting unit and is connected with the energy distribution unit through a low-voltage port.
Further, an electrical connection unit is located between the energy storage unit and the energy distribution unit, the electrical connection unit including: the fuse is positioned between the energy storage unit and the energy distribution unit; the first electric connection bar is connected with the fuse and is arranged at one side of the fuse; the second electric connection bar is connected with the fuse and is arranged at the other side of the fuse; the positive electrode electric connecting bar is connected with the positive electrode input electric connecting bar of the energy distribution unit and is arranged on one side of the first electric connecting bar; the negative electrode electric connecting bar is connected with the negative electrode input electric connecting bar of the energy distribution unit and is arranged on one side of the second electric connecting bar, the structure of the negative electrode electric connecting bar is a cubic structure, and a first stud structure is arranged above the cubic structure; wherein the first electrical connection bar, the fuse, the second electrical connection bar and the negative electrical connection bar are located on the same horizontal line.
According to another aspect of the present invention, there is provided a method for controlling thermal management of a power battery assembly, the method being used for controlling the power battery assembly, and the method including: acquiring parameters of the power battery, wherein the parameters at least comprise the SOC of the power battery, the temperature of the power battery, and the voltage and the current of the power battery; determining the working condition of the power battery based on the SOC of the power battery, the voltage and the current of the power battery, wherein the working condition of the power battery comprises a charging working condition and a discharging working condition; under the condition that the working condition of the power battery is determined to be a charging working condition, judging whether the temperature of the power battery is smaller than a first preset value or not; if yes, determining that the thermal management mode to be executed is a heating mode, wherein the heating mode is used for starting a PTC heating command of the whole vehicle, and the PTC heating command of the whole vehicle is used for controlling a liquid cooling system to heat a power battery; and under the condition that the working condition of the power battery is determined to be a discharging working condition, determining that the thermal management mode to be executed is a cooling mode, wherein the cooling mode is used for starting a cooling command of the battery of the whole vehicle, and the cooling command of the battery of the whole vehicle is used for controlling a liquid cooling system to cool the power battery.
Optionally, the method further comprises: under the condition that the thermal management mode needing to be executed is determined to be a heating mode, judging whether the temperature of the power battery is smaller than or equal to a second preset value or not; if yes, determining that a PTC heating mode of the lower box body is required to be started, wherein the PTC heating mode of the lower box body is used for controlling a PTC heating sheet of the lower box body to heat the power battery; and in the case that the temperature of the power battery is greater than a second preset value, the lower box body PTC heating mode is exited.
According to another aspect of the present invention, there is provided an electric vehicle including a power battery assembly, the power battery assembly being the power battery assembly described above.
By applying the technical scheme of the invention, the energy storage unit comprises the lower box body, the lower box body comprises the longitudinal edge beam and the transverse edge beam, the transverse edge beam is connected with the plurality of reinforcing beams, the plurality of reinforcing beams are arranged at intervals along the width direction of the lower box body, a first accommodating space is formed between the reinforcing beam adjacent to the longitudinal edge beam and the longitudinal edge beam in the plurality of reinforcing beams, a second accommodating space is formed between the adjacent reinforcing beams in the plurality of reinforcing beams, the first accommodating space and the second accommodating space are both used for accommodating the battery core, and the longitudinal edge beam and the reinforcing beams can both heat the battery core, so that the heating efficiency of the battery is effectively improved, the charging efficiency of the battery in a low-temperature environment is improved, and the user experience is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic structural diagram of a first embodiment of a power cell assembly according to the present disclosure;
FIG. 2 shows a schematic structural diagram of a second embodiment of a power cell assembly according to the present disclosure;
FIG. 3 is a schematic structural view showing a first embodiment of a lower case according to the present invention;
FIG. 4 is a schematic structural view showing a second embodiment of a lower case according to the present invention;
FIG. 5 is a schematic configuration view showing a third embodiment of a lower case according to the present invention;
FIG. 6 is a flow chart illustrating a first embodiment of a method for thermal management control of a power cell assembly according to the present disclosure;
fig. 7 shows a flowchart of a second embodiment of the thermal management control method of the power battery assembly according to the invention.
Wherein the figures include the following reference numerals:
1. an energy storage unit; 11. a lower box body; 111. a longitudinal edge beam; 1111. a first PTC cavity structure; 112. a reinforcing beam; 1121. a second PTC cavity structure; 113. a liquid cooling plate; 114. a transverse edge beam; 115. a high voltage wire harness; 12. an upper box body; 13. an electric core; 14. pouring a sealant; 15. a PTC heating sheet;
2. an energy distribution unit;
3. a control unit;
4. an electrical connection unit; 41. a positive electrode electrical connection bar; 42. a negative electrode electrical connection bar; 43. a first electrical connection bank; 44. a second electrical connection bank; 45. a fuse;
5. a low voltage connection unit; 51. a low pressure port.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1-5, a powertrain is provided according to an embodiment of the present application.
Specifically, the power battery assembly comprises an energy storage unit 1, the energy storage unit 1 comprises a lower box body 11, the lower box body 11 comprises a longitudinal edge beam 111 and a transverse edge beam 114, the transverse edge beam 114 is connected with a plurality of reinforcing beams 112, the reinforcing beams 112 are arranged at intervals along the width direction of the lower box body 11, a first accommodating space is formed between the reinforcing beam 112 adjacent to the longitudinal edge beam 111 in the reinforcing beams 112 and the longitudinal edge beam 111, a second accommodating space is formed between two adjacent reinforcing beams 112 in the reinforcing beams 112, and the first accommodating space and the second accommodating space are used for accommodating the battery core 13.
By applying the technical scheme of the embodiment, the energy storage unit 1 includes the lower box body 11, the lower box body 11 includes the longitudinal edge beam 111 and the transverse edge beam 114, the transverse edge beam 114 is connected with the plurality of reinforcing beams 112, the plurality of reinforcing beams 112 are arranged at intervals along the width direction of the lower box body 11, a first accommodating space is formed between the reinforcing beam 112 adjacent to the longitudinal edge beam 111 in the plurality of reinforcing beams 112 and the longitudinal edge beam 111, a second accommodating space is formed between the adjacent reinforcing beams 112 in the plurality of reinforcing beams 112, the first accommodating space and the second accommodating space are both used for accommodating the electric core 13, the longitudinal edge beam 111 and the reinforcing beam 112 can both heat the electric core 13, the heating efficiency of the battery is effectively improved, the charging efficiency of the battery in a low-temperature environment is improved, and the user experience is improved.
As shown in fig. 4 and 5, PTC heating sheets 15 are disposed between the longitudinal side beams 111 and the battery cells 13 and between the reinforcing beam 112 and the battery cells 13, a liquid cooling plate 113 is further disposed at the bottom of the lower case 11, and a liquid cooling flow passage is disposed inside the liquid cooling plate 113. The liquid-cooling plate 113 has a flat plate structure. The battery core is heated together by the PTC heating sheet 15 and the liquid cooling plate 113, so that the heating efficiency of the battery is further effectively improved, and the charging efficiency of the battery in a low-temperature environment is improved. Wherein, the energy storage unit also comprises an upper box body 12, and the upper box body 12 is connected with the lower box body 11.
Furthermore, gaps are formed among the battery cell 13, the longitudinal edge beam 111 and the reinforcing beam 112, the gaps are filled with the potting adhesive 14, and the ptc heating sheet 15 is in contact with the battery cell 13 through the potting adhesive 14. The potting adhesive 14 has functions of heat conduction, insulation and structure reinforcement. The battery cell 13 may be a square battery cell or a cylindrical battery cell. The tight connection between the battery cell 13 and the lower box body 11 is realized through the pouring sealant 14, so that the structural strength of the power battery assembly can be effectively improved, and the insulation effect of the power battery assembly can be improved.
Further, the longitudinal edge beam 111 is a profile structure, a first PTC cavity structure 1111 is arranged on one side of the longitudinal edge beam 111 facing the battery cell 13, a PTC heating sheet 15 is arranged in the first PTC cavity structure 1111, and the first PTC cavity structure 1111 is in contact with the battery cell 13 through a potting adhesive 14.
Further, the reinforcing beam 112 is a profile structure, a second PTC cavity structure 1121 is disposed on one side of the reinforcing beam 112 facing the battery cell 13, a PTC heating sheet 15 is disposed in the second PTC cavity structure 1121, and the second PTC cavity structure 1121 is in contact with the battery cell 13 through a potting compound 14.
The power battery assembly further comprises an energy distribution unit 2 and a control unit 3, wherein the energy distribution unit 2 is connected with the energy storage unit 1 through an electric connection unit 4, and the energy distribution unit 2 is connected with the PTC heating sheet 15 through a high-voltage wire harness 115. The control unit 3 is connected to the energy storage unit 1 via a low voltage connection unit 5, and the control unit 3 is connected to the energy distribution unit 2 via a low voltage port 51. Specifically, the energy distribution unit 2 and the control unit 3 are both assembled above the energy storage unit 1, and the connection forms between the energy distribution unit 2 and the energy storage unit 1 and between the control unit 3 and the energy storage unit 1 are all bolt connections. Through the integration of the energy storage unit 1 and the energy distribution unit 2, the length of high-low voltage wiring harnesses of the whole vehicle can be effectively reduced, the cost of the whole vehicle is reduced, and the space of the whole vehicle is saved.
Further, an electrical connection unit 4 is located between the energy storage unit 1 and the energy distribution unit 2, the electrical connection unit 4 comprising: fuse 45, first electrical connection bank 43, second electrical connection bank 44, positive electrical connection bank 41 and negative electrical connection bank 42. The fuse 45 is located between the energy storage unit 1 and the energy distribution unit 2, the first electrical connection row 43 is connected with the fuse 45, and the first electrical connection row 43 is located one side setting of fuse 45, the second electrical connection row 44 is connected with the fuse 45, and the second electrical connection row 44 is located the other side setting of fuse 45, the positive electrical connection row 41 is connected with the positive input electrical connection row of energy distribution unit 2, and the positive electrical connection row 41 is located one side setting of first electrical connection row 43, the negative electrical connection row 42 is connected with the negative input electrical connection row of energy distribution unit 2, and the negative electrical connection row 42 is located one side setting of second electrical connection row 44, the structure of negative electrical connection row 42 is the cube structure, the top of cube structure is provided with first double-screw structure. Wherein the first electrical connection bank 43, the fuse 45, the second electrical connection bank 44 and the negative electrical connection bank 42 are located on the same horizontal line. The arrangement enables the main body of the electric connection unit 4 to run in a straight line, and the length of the electric connection row can be reduced on the premise of connecting the energy distribution unit 2 and the energy storage unit 1, so that the production cost of the power battery is reduced. In the present embodiment, the surfaces of the positive electrical connection row 41, the negative electrical connection row 42, the first electrical connection row 43 and the second electrical connection row 44 are all coated with a high temperature resistant insulating material.
In another embodiment of the present application, a second stud structure is disposed above the fuse 45, the first electrical connection bank 43 and the second electrical connection bank 44 are connected to the fuse 45 through the second stud structure, the fuse 45 is driven by the control unit 3, and the fuse 45 can receive an instruction from the battery control unit 3 to implement active millisecond cut-off when the battery is in thermal runaway. Therefore, the risks of high-voltage short circuit and electric arc generation when the battery assembly is out of control due to heat are effectively reduced, and the safety of the power battery is improved.
In another embodiment of the present application, the energy distribution unit 2 includes a whole vehicle power distribution module, an ac charger module, and a DCDC/dc conversion module, the main structure of the energy distribution unit 2 is an aluminum alloy casting structure, and a maintenance opening is formed at the upper part of the energy distribution unit, the maintenance opening is configured to be matched with a bolt, and the maintenance opening is sealed by a sealing gasket.
In another embodiment of the present application, the energy distribution unit 2 can control the PTC heat generating sheet 15 to be turned on and off to heat the battery under the control of the battery control unit 3. The PTC heating sheet 15, the liquid cooling plate 113, the energy distribution unit 2 and the control unit 3 of the power battery jointly form a surrounding type intelligent temperature control system of the power battery.
According to another specific embodiment of the application, a thermal management control method of the power battery assembly is provided, and the method is used for controlling the power battery assembly in the embodiment. As shown in fig. 6, the method comprises the steps of:
step S101, obtaining parameters of a power battery, wherein the parameters at least comprise the SOC of the power battery, the temperature of the power battery, and the voltage and the current of the power battery;
step S102, determining the working condition of the power battery based on the SOC of the power battery, the voltage and the current of the power battery, wherein the working condition of the power battery comprises a charging working condition and a discharging working condition;
step S103, under the condition that the working condition of the power battery is determined to be a charging working condition, judging whether the temperature of the power battery is smaller than a first preset value or not;
step S104, if yes, determining that the thermal management mode to be executed is a heating mode, wherein the heating mode is used for starting a PTC heating command of the whole vehicle, and the PTC heating command of the whole vehicle is used for controlling a liquid cooling system to heat a power battery;
and S105, under the condition that the working condition of the power battery is determined to be a discharging working condition, determining that the thermal management mode to be executed is a cooling mode, wherein the cooling mode is used for starting a cooling command of a battery of the whole vehicle, and the cooling command of the battery of the whole vehicle is used for controlling a liquid cooling system to cool the power battery.
In this embodiment, when the operating condition of the power battery is determined as the charging operating condition, if the temperature of the power battery is higher than a certain value, the cooling mode is also executed. By adopting the thermal management control method of the power battery assembly, the corresponding thermal management mode is executed according to the SOC of the power battery, the temperature, the voltage and the current of the power battery, the power battery is ensured to work in the optimal temperature environment, and the reliability of the power battery is improved.
Optionally, as shown in fig. 7, the method further includes: under the condition that the thermal management mode needing to be executed is determined to be a heating mode, judging whether the temperature of the power battery is smaller than or equal to a second preset value or not; if yes, determining that a PTC heating mode of the lower box body is required to be started, wherein the PTC heating mode of the lower box body is used for controlling a PTC heating sheet of the lower box body to heat the power battery; and in the case that the temperature of the power battery is greater than a second preset value, the lower box body PTC heating mode is exited. Wherein the second preset value is the lower box PTC heating threshold at start-up in fig. 7. Therefore, the heating efficiency of the battery can be further improved, the charging efficiency of the battery in a low-temperature environment is improved, and the user experience is improved.
According to another specific embodiment of the present application, there is provided an electric vehicle including a power battery assembly, the power battery assembly being the power battery assembly in the above-described embodiment. By adopting the electric vehicle with the power battery assembly in the embodiment, the charging efficiency of the power battery in a low-temperature environment is improved, so that the reliability of the electric vehicle is improved, the space utilization rate of the whole vehicle is higher, and the cost of the whole vehicle is reduced.
For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A power cell assembly, comprising:
the energy storage unit (1) comprises a lower box body (11), the lower box body (11) comprises a longitudinal edge beam (111) and a transverse edge beam (114), the transverse edge beam (114) is connected with a plurality of reinforcing beams (112), the reinforcing beams (112) are arranged at intervals along the width direction of the lower box body (11), a first accommodating space is formed between the reinforcing beam (112) adjacent to the longitudinal edge beam (111) in the reinforcing beams (112) and the longitudinal edge beam (111), a second accommodating space is formed between two adjacent reinforcing beams (112) in the reinforcing beams (112), and the first accommodating space and the second accommodating space are used for accommodating a battery cell (13);
PTC heating sheets (15) are arranged between the longitudinal edge beam (111) and the battery cell (13) and between the reinforcing beam (112) and the battery cell (13);
the power battery assembly is controlled by adopting the following method steps:
step S101, parameters of a power battery are obtained, wherein the parameters at least comprise the SOC of the power battery, the temperature of the power battery, and the voltage and the current of the power battery;
step S102, determining the working condition of the power battery based on the SOC of the power battery, the voltage and the current of the power battery, wherein the working condition of the power battery comprises a charging working condition and a discharging working condition;
step S103, under the condition that the working condition of the power battery is determined to be a charging working condition, judging whether the temperature of the power battery is smaller than a first preset value or not;
step S104, if yes, determining that the thermal management mode to be executed is a heating mode, wherein the heating mode is used for starting a PTC heating command of the whole vehicle, and the PTC heating command of the whole vehicle is used for controlling a liquid cooling system to heat a power battery;
and S105, under the condition that the working condition of the power battery is determined to be a discharging working condition, determining that the thermal management mode to be executed is a cooling mode, wherein the cooling mode is used for starting a cooling command of a battery of the whole vehicle, and the cooling command of the battery of the whole vehicle is used for controlling a liquid cooling system to cool the power battery.
2. The power cell assembly of claim 1,
the bottom of lower box (11) still is provided with liquid cooling board (113), the inside of liquid cooling board (113) is provided with the liquid cooling runner.
3. The power battery assembly of claim 2,
the battery cell (13) is arranged with a gap between the longitudinal edge beam (111) and the reinforcing beam (112), the gap is filled with a pouring sealant (14), and the PTC heating sheet (15) is in contact with the battery cell (13) through the pouring sealant (14).
4. The power cell assembly of claim 3,
vertical boundary beam (111) is the section bar structure, vertical boundary beam (111) orientation one side of electric core (13) is provided with first PTC die cavity structure (1111), be provided with in first PTC die cavity structure (1111) PTC heating plate (15), first PTC die cavity structure (1111) passes through casting glue (14) with electric core (13) contact.
5. The power cell assembly of claim 3,
the reinforcing beam (112) is of a profile structure, one side, facing the battery core (13), of the reinforcing beam (112) is provided with a second PTC cavity structure (1121), the second PTC cavity structure (1121) is internally provided with the PTC heating sheet (15), and the second PTC cavity structure (1121) is in contact with the battery core (13) through the pouring sealant (14).
6. The power battery assembly of claim 1, further comprising:
the energy distribution unit (2), the energy distribution unit (2) is connected with the energy storage unit (1) through an electric connection unit (4), and the energy distribution unit (2) is connected with the PTC heating sheet (15) through a high-voltage wire harness (115);
the control unit (3) is connected with the energy storage unit (1) through a low-voltage connection unit (5), and the control unit (3) is connected with the energy distribution unit (2) through a low-voltage port (51).
7. Power battery assembly according to claim 6, characterized in that the electrical connection unit (4) is located between the energy storage unit (1) and the energy distribution unit (2), the electrical connection unit (4) comprising:
a fuse (45), the fuse (45) being located between the energy storage unit (1) and the energy distribution unit (2);
a first electrical connection row (43), the first electrical connection row (43) being connected with the fuse (45), and the first electrical connection row (43) being disposed at one side of the fuse (45);
a second electrical connection row (44), the second electrical connection row (44) being connected to the fuse (45), and the second electrical connection row (44) being disposed on the other side of the fuse (45);
a positive electrical connection bank (41), said positive electrical connection bank (41) being connected to a positive input electrical connection bank of said energy distribution unit (2), and said positive electrical connection bank (41) being disposed on one side of said first electrical connection bank (43);
the negative electrode electric connection row (42) is connected with the negative electrode input electric connection row of the energy distribution unit (2), the negative electrode electric connection row (42) is arranged on one side of the second electric connection row (44), the negative electrode electric connection row (42) is of a cubic structure, and a first stud structure is arranged above the cubic structure;
wherein the first electrical connection bank (43), the fuse (45), the second electrical connection bank (44) and the negative electrical connection bank (42) are located on the same horizontal line.
8. A method for controlling thermal management of a power cell assembly, the method being used for controlling the power cell assembly according to any one of claims 1 to 7, the method comprising:
acquiring parameters of a power battery, wherein the parameters at least comprise the SOC of the power battery, the temperature of the power battery, and the voltage and the current of the power battery;
determining the working condition of the power battery based on the SOC of the power battery, the voltage and the current of the power battery, wherein the working condition of the power battery comprises a charging working condition and a discharging working condition;
under the condition that the working condition of the power battery is determined to be the charging working condition, judging whether the temperature of the power battery is smaller than a first preset value or not;
if yes, determining that the thermal management mode to be executed is a heating mode, wherein the heating mode is used for starting a PTC heating command of the whole vehicle, and the PTC heating command of the whole vehicle is used for controlling a liquid cooling system to heat the power battery;
the method comprises the steps of determining that a heat management mode is a cooling mode under the condition that the working condition of the power battery is the discharging working condition, wherein the cooling mode is used for starting a cooling command of a whole vehicle battery, and the cooling command of the whole vehicle battery is used for controlling a liquid cooling system to cool the power battery.
9. The method of claim 8, further comprising:
under the condition that the thermal management mode required to be executed is determined to be the heating mode, judging whether the temperature of the power battery is smaller than or equal to a second preset value or not;
if yes, determining that a PTC heating mode of the lower box body is required to be started, wherein the PTC heating mode of the lower box body is used for controlling a PTC heating sheet of the lower box body to heat the power battery;
and when the temperature of the power battery is greater than the second preset value, the lower box body PTC heating mode is exited.
10. An electric vehicle comprising a power battery assembly, the power battery assembly being as claimed in any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211204712.6A CN115312953B (en) | 2022-09-30 | 2022-09-30 | Power battery assembly, thermal management control method thereof and electric vehicle |
| PCT/CN2023/094621 WO2024066392A1 (en) | 2022-09-30 | 2023-05-16 | Power battery assembly, thermal management and control method therefor, and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211204712.6A CN115312953B (en) | 2022-09-30 | 2022-09-30 | Power battery assembly, thermal management control method thereof and electric vehicle |
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| CN115312953A CN115312953A (en) | 2022-11-08 |
| CN115312953B true CN115312953B (en) | 2023-02-03 |
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| CN202211204712.6A Active CN115312953B (en) | 2022-09-30 | 2022-09-30 | Power battery assembly, thermal management control method thereof and electric vehicle |
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| WO (1) | WO2024066392A1 (en) |
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| CN115312953B (en) * | 2022-09-30 | 2023-02-03 | 中国第一汽车股份有限公司 | Power battery assembly, thermal management control method thereof and electric vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110588277A (en) * | 2019-08-16 | 2019-12-20 | 中国第一汽车股份有限公司 | Electric automobile thermal management method and system and vehicle |
| CN111688544A (en) * | 2020-05-29 | 2020-09-22 | 爱驰汽车有限公司 | Thermal management control method for power battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204315687U (en) * | 2015-01-05 | 2015-05-06 | 北京长城华冠汽车科技有限公司 | Lithium-ion-power cell bag constant temp. heating management system |
| CN105789516B (en) * | 2016-05-13 | 2018-11-06 | 合肥工业大学 | Power battery thermal control babinet |
| CN109390525A (en) * | 2018-10-18 | 2019-02-26 | 浙江仁丰科技有限公司 | A kind of insulation shock-absorbing type new-energy automobile fever tablet |
| CN111933882A (en) * | 2020-07-01 | 2020-11-13 | 孚能科技(赣州)股份有限公司 | Battery system |
| CN212934720U (en) * | 2020-07-29 | 2021-04-09 | 中国第一汽车股份有限公司 | Power lithium battery module |
| CN112151910B (en) * | 2020-09-27 | 2022-02-18 | 中国第一汽车股份有限公司 | Liquid-cooled battery system and control method thereof |
| CN112498178B (en) * | 2020-10-22 | 2022-04-08 | 东风汽车集团有限公司 | Method for controlling temperature of battery pack before and after charging in high-temperature and low-temperature environment of electric vehicle |
| WO2022143409A1 (en) * | 2020-12-31 | 2022-07-07 | 福建福夏科技有限责任公司 | Battery cell and battery module comprising same |
| CN113224435B (en) * | 2021-04-28 | 2024-06-11 | 力神（青岛）新能源有限公司 | High specific energy battery pack |
| CN217468650U (en) * | 2021-11-24 | 2022-09-20 | 奇瑞商用车（安徽）有限公司 | Power battery box structure integrating liquid cooling and heating functions |
| CN115312953B (en) * | 2022-09-30 | 2023-02-03 | 中国第一汽车股份有限公司 | Power battery assembly, thermal management control method thereof and electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110588277A (en) * | 2019-08-16 | 2019-12-20 | 中国第一汽车股份有限公司 | Electric automobile thermal management method and system and vehicle |
| CN111688544A (en) * | 2020-05-29 | 2020-09-22 | 爱驰汽车有限公司 | Thermal management control method for power battery |
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| WO2024066392A1 (en) | 2024-04-04 |
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