CN111106409B - Heat management device and heat management method for battery pack of lithium electric forklift - Google Patents
Heat management device and heat management method for battery pack of lithium electric forklift Download PDFInfo
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- CN111106409B CN111106409B CN201911277859.6A CN201911277859A CN111106409B CN 111106409 B CN111106409 B CN 111106409B CN 201911277859 A CN201911277859 A CN 201911277859A CN 111106409 B CN111106409 B CN 111106409B
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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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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
- H01M10/6556—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
- H01M10/6561—Gases
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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
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
- H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention provides a thermal management device for a battery pack of a lithium electric forklift, which comprises a battery pack box body and a cold and hot air conditioner, wherein a battery pack air inlet is formed in the upper part of the battery pack box body, a battery pack air outlet is formed in the side wall of the battery pack box body, a battery module and a battery pack internal air pipeline are arranged in the battery pack box body, the battery pack internal air pipeline is positioned above the battery module, an air pipeline air inlet is formed in the upper part of the battery pack internal air pipeline, the air pipeline air inlet is connected with the battery pack air inlet, the cold and hot air conditioner is provided with an air conditioner air outlet pipe, and the air conditioner air outlet pipe is detachably connected with the battery pack air inlet so that. The invention has the beneficial effects that: according to the invention, the detachable cold and hot air conditioner is connected to the battery pack box body, so that the temperature of the battery module during charging is controlled through the cold and hot air conditioner, and therefore, the charging time of the battery pack is effectively shortened and the utilization rate of the battery pack is improved on the premise of ensuring the use safety, the service life and the cost of the battery pack.
Description
Technical Field
The invention relates to the technical field of thermal management of battery packs, in particular to a thermal management device and a thermal management method of a lithium-ion forklift battery pack.
Background
At present, the battery core type used by the lithium electric forklift power battery pack is generally a lithium iron phosphate battery, and the suitable working temperature range of the lithium iron phosphate battery is 10-45 ℃; the application scenes of the lithium electric forklift are diverse, and the scene of the on-site environment temperature comprises a refrigeration house, a normal-temperature workshop and a high-temperature workshop; the on-site working cycle includes 8-hour system, 12-hour system and 24-hour system charging and discharging applications and low-intensity applications.
The existing thermal management mode of the lithium-ion forklift battery pack in the market is mainly based on natural air cooling, and can meet the application requirements of low temperature or low working beat strength; part of the lithium electric forklift battery pack has a forced air cooling heat dissipation mode, and can be well adapted to low-temperature and high-strength application scenes; however, under the condition of high ambient temperature, the battery pack still needs to be ensured to be safe to use and have a service life by reducing the charging rate to control the temperature rise of the battery core, so that the problems of prolonged charging time and reduced utilization rate of the lithium electric forklift exist. Liquid and on-board air conditioning cooling solutions suffer from cost and size, and are relatively difficult to implement, albeit with considerable effectiveness. Similarly, the battery pack needs to be heated to ensure that the battery pack is normally charged and discharged at a proper temperature under the condition of extremely low temperature, the charging time is shortened, and the utilization rate of the battery pack is improved.
Disclosure of Invention
In view of this, the embodiment of the invention provides a thermal management device and a thermal management method for a battery pack of a lithium forklift.
The embodiment of the invention provides a thermal management device for a battery pack of a lithium electric forklift, which comprises a battery pack box body and a cold and hot air conditioner detachably connected with the battery pack box body, a battery pack air inlet is formed above the battery pack box body, a battery pack air outlet is formed in the side wall of the battery pack box body, the shape of the battery pack air inlet is the same as that of the battery pack air outlet, and are all provided with sealing covers, a battery module and a battery pack internal air duct are arranged in the battery pack box body, the battery pack internal air duct is positioned above the battery module, an air inlet of the air duct is arranged above the air duct in the battery pack and is connected with the air inlet of the battery pack, the cold and hot air conditioner is equipped with the air conditioner and goes out the tuber pipe, the air conditioner goes out the tuber pipe and can dismantle the connection the battery package air intake makes the air conditioner go out the tuber pipe with the inside wind pipeline intercommunication of battery package or disconnection.
Furthermore, a plurality of branch pipes are arranged on the air pipeline inside the battery pack, the number of the branch pipes is the same as that of the battery modules, and one branch pipe is correspondingly arranged above each battery module.
Furthermore, each branch pipe is uniformly provided with a plurality of air duct outlets.
Furthermore, a battery pack skylight upper cover is arranged above the battery pack box body, and a battery pack air inlet is formed in the battery pack skylight upper cover.
Furthermore, a battery pack air pipe seat is arranged on the battery pack air inlet in a matching mode, and the air conditioner air outlet pipe is connected with the battery pack air inlet through the battery pack air pipe seat.
Further, the invention also provides a thermal management method of the thermal management device of the lithium forklift battery pack, which comprises the following steps:
s1, before the battery pack is charged, installing the battery pack air pipe seat above the battery pack air inlet, and communicating the air conditioner air outlet pipe with the battery pack air inlet through the battery pack air pipe seat;
s2, in the charging process of the battery pack, the cold and hot air conditioner starts to work, cold air or hot air is continuously conveyed to the air pipeline inside the battery pack through the air outlet pipe of the air conditioner, the cold air or the hot air is respectively sprayed out through the air pipeline air outlets on the branch pipes to enable the modules to be uniformly cooled or heated, and the cold air or the hot air is discharged from the battery pack air outlet after being uniformly cooled or heated for the modules, so that the battery module is controlled to have the ideal charging temperature T1Lower charge, said ideal charging temperature T1The value range of (A) is 20 to 30 ℃;
s3, after the battery pack is charged, removing the battery pack air pipe seat and the air conditioner air outlet pipe which are connected above the battery pack air inlet, and respectively plugging the battery pack air inlet and the battery pack air outlet by the sealing cover, so as to control the battery module to discharge within an appropriate temperature range, wherein the appropriate temperature range is 10-45 ℃;
and S4, when the battery pack needs to be charged again after the discharging is finished, returning to S1, and circulating the steps.
Further, in step S2, when the cooling and heating air conditioner cools the battery module, the ideal charging and discharging temperature T is set1Lower than the temperature outside the battery pack case; when the cold and hot air conditioner heats the battery module, the ideal charging and discharging temperature T1Higher than the temperature outside the battery pack case.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: according to the thermal management device for the battery pack of the lithium-ion forklift, the detachable cold and hot air conditioner is connected to the battery pack box body, so that the temperature of the battery module during charging is controlled through the cold and hot air conditioner, namely, the battery module is refrigerated or heated according to different application scenes of the battery pack, and therefore the charging time of the battery pack is effectively shortened and the utilization rate of the battery pack is improved on the premise that the use safety, the service life and the cost of the battery pack are guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a thermal management device of a battery pack of a lithium forklift.
Fig. 2 is a schematic structural view of the air duct 5 inside the battery pack according to the present invention.
Fig. 3 is a schematic structural view of the cooling and heating air conditioner 9 of the present invention.
In the figure: 1-a battery pack box body, 2-a battery pack skylight upper cover, 3-a battery pack air inlet, 4-a battery pack air outlet, 5-a battery pack internal air pipeline, 6-an air pipeline air inlet, 7-a branch pipe, 8-an air pipeline air outlet, 9-a cold-hot air conditioner and 10-an air conditioner air outlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 and fig. 3, an embodiment of the present invention provides a thermal management device for a battery pack of a lithium forklift, including a battery pack case 1, and a cooling and heating air conditioner 9 detachably connected to the battery pack case 1.
Battery package air intake 3 has been seted up to battery package box 1 top, specifically, battery package box 1 top is equipped with battery package skylight upper cover 2, battery package air intake 3 sets up on the battery package skylight upper cover 2, battery package air outlet 4 has been seted up to battery package box 1 lateral wall, battery package air intake 3 with battery package air outlet 4 shape is the same, and all sets the closing cap (not drawing in the drawing), in this embodiment set battery package air pipe seat (not drawing in the drawing) on the battery package air intake 3, air conditioner play tuber pipe 10 passes through battery package air pipe seat is connected battery package air intake 3.
Referring to fig. 1 and 2, a battery module (not shown in the drawings) and a battery pack internal air duct 5 are arranged inside the battery pack case 1, the battery pack internal air duct 5 is located above the battery module, an air duct inlet 6 is arranged above the battery pack internal air duct 5, the air duct inlet 6 is connected to the battery pack inlet 3, in this embodiment, a plurality of branch pipes 7 are arranged on the battery pack internal air duct 5, the number of the branch pipes 7 is the same as that of the battery modules, one branch pipe 7 is correspondingly arranged above each battery module, and a plurality of air duct outlets 8 are uniformly arranged on each branch pipe 7, in this embodiment, when cold air or hot air enters the battery pack internal air duct 5 through the air duct inlet 6, the dry air duct outlets 8 on each branch pipe 7 can uniformly spray the cold air or the hot air, the module is uniformly cooled or heated, and cold air or hot air is supplied to the module for uniform refrigeration or heating and then is discharged from the air outlet 4 of the battery pack so as to ensure the consistency of the temperatures of all the electric cores in the battery module and prolong the service life of the battery pack.
The cold and hot air conditioner 9 is provided with an air conditioner air outlet pipe 10, the air conditioner air outlet pipe 10 is detachably connected with the battery pack air inlet 3, so that the air conditioner air outlet pipe 10 is communicated with or disconnected from the battery pack internal air pipeline 5, namely when the air conditioner air outlet pipe 10 is connected with the battery pack air inlet 3, the air conditioner air outlet pipe 10 is communicated with the battery pack internal air pipeline 5, and at the moment, the cold and hot air conditioner 9 can convey cold air or hot air to the battery pack box body 1 through the air conditioner air outlet pipe 10; when the air conditioner goes out tuber pipe 10 and does not connect during battery package air intake 3, the air conditioner go out tuber pipe 10 with the inside wind pipeline 5 disconnection of battery package, at this moment 9 stop work of cold and hot air conditioner is directed against the service environment of difference in this embodiment, cold and hot air conditioner 9 can have refrigeration and heating function simultaneously, also can only refrigerate or heating function, in order to practice thrift one of cost cold and hot air conditioner 9 can with a plurality of the battery package is supporting to be used.
Further, the invention also provides a thermal management method of the thermal management device of the lithium forklift battery pack, which comprises the following steps:
s1, before the battery pack is charged, installing the battery pack air pipe seat above the battery pack air inlet 3, and communicating the air conditioner air outlet pipe 10 with the battery pack air inlet 3 through the battery pack air pipe seat;
s2, in the charging process of the battery pack, the cold and hot air conditioner 9 starts to work, cold air or hot air is continuously conveyed to the air duct 5 in the battery pack through the air outlet pipe 10 of the air conditioner, the cold air or the hot air is respectively sprayed out through the air duct air outlets 8 on the branch pipes 7 to enable the modules to be uniformly cooled or heated, and the cold air or the hot air is uniformly cooled or heated and then discharged from the battery pack air outlet 4, so that the battery modules are controlled to be at the ideal charging temperature T1Lower charge, said ideal charging temperature T1The value range of (A) is 20 to 30 ℃;
s3, after the battery pack is charged, detaching the battery pack air pipe seat and the air conditioner air outlet pipe 10 which are connected above the battery pack air inlet 3, respectively plugging the battery pack air inlet 3 and the battery pack air outlet 4 by the sealing cover to seal the battery pack box body 1, so that the internal temperature of the battery pack box body 1 is not easy to rise or fall to control the battery module to discharge continuously in an appropriate temperature range, wherein the appropriate temperature range is 10-45 ℃, and in the embodiment, the ideal charging temperature T is adopted1Enough heating space and enough cooling space are reserved between the upper limit and the lower limit of the proper temperature, so that the battery pack can be ensured to holdContinuously discharging within a proper temperature range until the electric quantity in the battery pack is discharged;
and S4, when the battery pack needs to be charged again after the discharging is finished, returning to S1, and circulating the steps.
In this embodiment, when the cold-hot air conditioner 9 cools the battery module, the ideal charging temperature T is set1The temperature lower than the temperature outside the battery pack case 1 is generally the optimum temperature for charging the battery cell at the maximum rate of 20 ℃ to 45 ℃ because the relationship between the charging and discharging rates of different battery cells and the temperature is different, and the ideal charging temperature T is preferably set in this embodiment1The temperature is set to be 25 ℃, so that the maximum multiplying power charging temperature of the battery core can be ensured, and at least 20 ℃ of battery discharging temperature rise space can be reserved, in the field of forklifts, due to the particularity of the use working conditions, the large-current discharging of the forklifts is only carried out when heavy objects are lifted, so that the time is short, the heating is less, the temperature rise is generally not more than 10 ℃, and the 20 ℃ of temperature rise space is enough to ensure that the temperature of the battery core is not more than the discharging cut-off temperature of the battery core after; when the cold and hot air conditioner 9 heats the battery module, the ideal charging temperature T1Is higher than the temperature outside the battery pack box body 1, and the battery pack is at the ideal charging temperature T1When the battery pack starts to be used after being charged, the temperature of the battery core may be increased or decreased, which is related to the use condition of the battery pack, if the discharge heat generation amount of the battery module is large, the temperature of the battery core is increased, otherwise, the cooling speed of the battery module is faster, the temperature of the battery core is decreased, and in this embodiment, it is preferable that the ideal charging temperature T is set to be the ideal charging temperature T1And setting the temperature at 25 ℃ to reserve a cooling space at 15 ℃ and a heating space at 20 ℃, so that the battery core can not exceed the discharging use temperature range of the battery core before the battery pack is emptied.
According to the thermal management device for the battery pack of the lithium-ion forklift, the detachable cold and hot air conditioner 9 is connected to the battery pack box body 1, so that the temperature of the battery module during charging is controlled through the cold and hot air conditioner 9, namely the battery module is refrigerated or heated according to different application scenes of the battery pack, and therefore the charging time of the battery pack is effectively shortened and the utilization rate of the battery pack is improved on the premise that the use safety, the service life and the cost of the battery pack are guaranteed.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a thermal management device of lithium electric fork truck battery package which characterized in that: including the battery package box, and with the cold and hot air conditioner of connection can be dismantled to the battery package box, the battery package air intake has been seted up to battery package box top, battery package box lateral wall has been seted up the battery package air outlet, the battery package air intake with battery package air outlet shape is the same, and has all set the closing cap, the inside battery module and the inside wind pipeline of battery package that is equipped with of battery package box, the inside wind pipeline of battery package is located the battery module top, just the inside wind pipeline top of battery package is equipped with wind pipeline air intake, wind pipeline air intake connection the battery package air intake, cold and hot air conditioner is equipped with air conditioner air-out pipe, the air conditioner air-out pipe can be dismantled the connection the battery package air intake, makes the air conditioner air-out pipe with the inside wind pipeline of battery package communicates or breaks away.
2. The thermal management device for the lithium forklift battery pack according to claim 1, wherein: the battery pack is characterized in that a plurality of branch pipes are arranged on the air pipeline inside the battery pack, the number of the branch pipes is the same as that of the battery modules, and one branch pipe is correspondingly arranged above each battery module.
3. The thermal management device for the lithium forklift battery pack according to claim 2, wherein: each branch pipe is uniformly provided with a plurality of air duct outlets.
4. A lithium forklift battery pack thermal management device according to claim 3, characterized in that: a battery pack skylight upper cover is arranged above the battery pack box body, and a battery pack air inlet is formed in the battery pack skylight upper cover.
5. The thermal management device for the lithium forklift battery pack according to claim 4, wherein: and a battery pack air pipe seat is arranged on the battery pack air inlet in a matching manner, and the air conditioner air outlet pipe is connected with the battery pack air inlet through the battery pack air pipe seat.
6. The thermal management method of the thermal management device of the lithium forklift battery pack, according to claim 5, is characterized by comprising the following steps:
s1, before the battery pack is charged, installing the battery pack air pipe seat above the battery pack air inlet, and communicating the air conditioner air outlet pipe with the battery pack air inlet through the battery pack air pipe seat;
s2, in the charging process of the battery pack, the cold and hot air conditioner starts to work, cold air or hot air is continuously conveyed to the air pipeline inside the battery pack through the air outlet pipe of the air conditioner, the cold air or the hot air is respectively sprayed out through the air pipeline air outlets on the branch pipes to enable the modules to be uniformly cooled or heated, and the cold air or the hot air is discharged from the battery pack air outlet after being uniformly cooled or heated for the modules, so that the battery module is controlled to have the ideal charging temperature T1Lower charge, said ideal charging temperature T1The value range of (A) is 20 to 30 ℃;
s3, after the battery pack is charged, removing the battery pack air pipe seat and the air conditioner air outlet pipe which are connected above the battery pack air inlet, and respectively plugging the battery pack air inlet and the battery pack air outlet by the sealing cover, so as to control the battery module to discharge within an appropriate temperature range, wherein the appropriate temperature range is 10-45 ℃;
and S4, when the battery pack needs to be charged again after the discharging is finished, returning to S1, and circulating the steps.
7. The thermal management method of the thermal management device for the lithium forklift battery pack, according to claim 6, is characterized in that: in step S2, when the cooling and heating air conditioner cools the battery module, the ideal charging and discharging temperature T is set1Lower than the temperature outside the battery pack case; when the cold and hot air conditioner heats the battery module, the ideal charging and discharging temperature T1Higher than the temperature outside the battery pack case.
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| CN201911277859.6A CN111106409B (en) | 2019-12-11 | 2019-12-11 | Heat management device and heat management method for battery pack of lithium electric forklift |
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| CN112635879B (en) * | 2020-11-30 | 2022-11-22 | 中山中能时代新能源有限公司 | Be suitable for power battery package assembly of new forms of energy electric motor car |
| CN114784412B (en) * | 2022-04-18 | 2024-09-10 | 郑州新基业汽车电子有限公司 | Heat management equipment of new energy automobile |
| FR3139948A1 (en) * | 2022-09-16 | 2024-03-22 | Saft | Battery module container provided with a cooling system, electrical power storage system and associated method |
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