CN219696539U - Compact liquid cooling lithium battery pack for industrial vehicle - Google Patents
Compact liquid cooling lithium battery pack for industrial vehicle Download PDFInfo
- Publication number
- CN219696539U CN219696539U CN202320350952.0U CN202320350952U CN219696539U CN 219696539 U CN219696539 U CN 219696539U CN 202320350952 U CN202320350952 U CN 202320350952U CN 219696539 U CN219696539 U CN 219696539U
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- China
- Prior art keywords
- battery pack
- lithium battery
- heat exchanger
- water pipe
- heat dissipation
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 45
- 238000001816 cooling Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 230000017525 heat dissipation Effects 0.000 claims abstract description 27
- 239000000110 cooling liquid Substances 0.000 claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000003292 glue Substances 0.000 claims abstract description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002056 nanofire structure Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a compact liquid cooling lithium battery pack for an industrial vehicle, which comprises a box body and a lithium battery pack, wherein the inner side edge of the box body is fixedly provided with a fire extinguishing device through industrial glue, the box body is internally provided with the lithium battery pack through a buckle, the bottom of the lithium battery pack is paved with a heat dissipation water pipe, the water inlet of the heat dissipation water pipe is connected with a water pump, the water outlet of the heat dissipation water pipe is connected with a plate heat exchanger, the plate heat exchanger is in sealing connection with a cooling liquid tank through a water pipe, and the other end of the water pump is connected with the cooling liquid tank; the compressor is connected with the plate heat exchanger and the condenser assembly in series respectively, the compressor is connected with the integrated machine in parallel, and the smoke sensor and the condenser assembly are connected with the integrated machine in series; an expansion valve is connected in series between the plate heat exchanger and the condenser assembly; the all-in-one is connected with the water pump. The utility model has compact structure and convenient assembly, is beneficial to the installation in a narrow space and effectively inhibits the working condition of overlarge temperature difference of the battery module during high-rate discharge.
Description
Technical Field
The utility model relates to the field of lithium batteries, in particular to a compact liquid cooling lithium battery pack for a vehicle.
Background
The fuel cell has the advantages of cleanness, no pollution, multiple conversion ways and the like, accords with the current energy conservation and emission reduction and energy sustainable development directions, and is also an important direction for power substitution of industrial vehicles. At present, the fuel cell is provided with an auxiliary lithium battery, the electric industrial vehicle has complex working condition and higher requirements on a fuel cell system, the traditional pure lithium electric industrial vehicle has the characteristics of larger capacity, low charge and discharge frequency of lithium battery monomers, larger arrangement space and lithium battery package volume and better heat dissipation performance. The fuel cell vehicle occupies a large amount of space due to the fuel cell system and the hydrogen bottle, the attached lithium battery has limited space capacity, the fuel cell industrial vehicle can only select the lithium battery with small capacity but higher charge and discharge capacity under the influence of space, and the lithium battery has very high charge and discharge frequency in the use process, so that larger heating value is generated in the use process, and the whole cycle life and the use state of the lithium battery can be influenced if the heat dissipation high temperature is not timely carried out, and the temperature reduction control of the lithium battery pack of the fuel cell is different from the traditional temperature reduction control of the lithium battery, so that the complex working condition is required to be satisfied, the heat dissipation can be effectively carried out, and the normal and safe use of the fuel cell system can be ensured.
At present, more effective heat dissipation of lithium batteries is mainly achieved by liquid cooling, cooling pipelines are arranged between battery modules, heat on the surfaces of the batteries is taken away through cooling liquid in the pipelines, and at present, heat dissipation of pure lithium batteries is often achieved by separating a battery pack from a heat dissipation system, and the battery pack and the heat dissipation system are separately installed and then connected through the pipelines. The split type installation is a difficult problem in space arrangement for industrial vehicles such as forklifts and the like using hydrogen fuel cells, so that a compact integrated battery module needs to be designed, and the problems of installation and heat dissipation under the condition of a narrow space are solved.
Disclosure of Invention
In view of the above-described drawbacks or shortcomings in the prior art, it is desirable to provide a compact liquid-cooled lithium battery pack for industrial vehicles.
According to the technical proposal provided by the embodiment of the utility model,
the compact liquid cooling lithium battery pack for the industrial vehicle comprises a box body and a lithium battery pack, wherein the inner side edge of the box body is fixed with a fire extinguishing device through industrial glue, the lithium battery pack is fixed in the box body through a buckle,
a heat dissipation water pipe is paved at the bottom of the lithium battery pack, a water pump is connected to the water inlet of the heat dissipation water pipe, the water outlet of the heat dissipation water pipe is connected with a plate heat exchanger, the plate heat exchanger is connected with a cooling liquid tank in a sealing way through a water pipe, and the other end of the water pump is connected to the cooling liquid tank; the compressor is connected with the plate heat exchanger and the condenser assembly in series respectively, the compressor is connected with the integrated machine in parallel, and the smoke sensor and the condenser assembly are connected with the integrated machine in series; an expansion valve is connected in series between the plate heat exchanger and the condenser assembly; the all-in-one machine is connected with the water pump.
In the utility model, the lithium battery pack further comprises a battery box, and a 1-parallel 25-string power supply system is mainly formed by connecting 1-parallel 12 strings and 1-parallel 13 standard modules in series.
In the utility model, further, a main contactor is connected to the lithium battery pack.
In summary, the utility model has the following beneficial effects:
1. the refrigerating unit and the battery pack are integrated, and the battery and the heat dissipation control are integrated in the integrated machine, so that the number of controllers and sensors is reduced, and the whole volume of the battery box is compressed;
2. besides the conventional heat dissipation function, a fire extinguishing device is additionally arranged, so that the fire extinguishing function can be actively triggered when the temperature of the battery box is too high;
3. the battery has relatively small capacity, has high-rate charge and discharge capability, and is mainly used for equipment requiring frequent charge and discharge of the battery or frequent shallow charge and shallow discharge of the battery;
4. compact structure, convenient assembling does benefit to narrow and small space installation, effectively suppresses the too big operating mode of difference in temperature when high multiplying power discharges of battery module.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of a cooling control system according to the present utility model;
FIG. 3 is a flow chart of the cooling control operation of the present utility model;
fig. 4 is a comparison of the present solution with other types of equipment in the prior art.
Reference numerals in the drawings:
a main contactor-1; a fire extinguishing device-2; a lithium battery pack-3; a smoke sensor-4; a water pump-5; an integrated machine-6; a cooling liquid tank-7; condenser assembly-8; a compressor-9; an expansion valve-10; a plate heat exchanger-11; and a box body-12.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, the compact liquid-cooled lithium battery pack for industrial vehicles comprises a box body 12 and a lithium battery pack 3, wherein the lithium battery pack 3 comprises a battery box, and a 1-parallel 25-string power supply system is mainly formed by connecting 1-parallel 12-string and 1-parallel 13-string standard modules in series. The smoke concentration acquisition sensor 4 is arranged in the lithium battery box 12 and is arranged at a position close to the lithium battery pack 3 in the box 12 and used for detecting smoke concentration parameters in a heat flow channel of the box 12. The smoke concentration acquisition sensor 4 acquires smoke concentration data and sends the data to the all-in-one machine 6, the all-in-one machine 6 receives a smoke concentration value and then sends a corresponding alarm signal according to a concentration threshold value, and message information is transmitted to the whole vehicle VCU through a bus. The battery box 12 also contains 1 fire extinguishing device 2. The fire extinguishing device comprises fire extinguishing materials, and can automatically decompose and release solid fire extinguishing media under high-temperature environment (such as the temperature is higher than 100 ℃) so as to block a combustion chemical chain. The fire extinguishing material can be micro-nano fire extinguishing granular material, and when the material is manufactured, liquid fire extinguishing medium or gas fire extinguishing medium can be compressed into nano-level small particles, and after the fire extinguishing material is decomposed and solid fire extinguishing medium is released in a high-temperature environment, the fire extinguishing medium can be gasified in the high-temperature environment, and heat in the high-temperature environment is taken away to play a role in fire extinguishing and cooling.
A heat dissipation water pipe is paved at the bottom of the lithium battery pack 3, the heat dissipation water pipe adopts a net-shaped mode, the heat dissipation water pipe is made of a stainless steel water pipe and a heat conduction silica gel foam sealing pad, a water pump 5 is connected to the water inlet of the heat dissipation water pipe, the water pump 5 drives cooling liquid to circulate between the heat exchanger and a battery pipeline, and the power of the water pump is about 50W.
The water outlet of the heat dissipation water pipe is connected with a plate heat exchanger 11. The medium at two sides of the plate heat exchanger 11 adopts countercurrent heat exchange. The technical parameters are as follows: t1=18.5deg.C t1 '=15deg.C t2=0deg.C t2' =5deg.C, and after calculation matching, selecting plate heat exchange quantity of plate heat exchange under rated mass flow to be larger than 1.1KW.
The plate heat exchanger 11 is in sealing connection with the cooling liquid tank 7 through a water pipe, the other end of the water pump 5 is connected to the cooling liquid tank 7, and the integrated machine 6 is connected with the water pump 5. The integrated machine 6 mainly has functions of analysis, calculation, data processing and communication with the whole vehicle, and the functions of voltage and temperature acquisition of single batteries comprise voltage acquisition, 8-path temperature acquisition and the like of each battery.
The compressor 9 is respectively connected with the plate heat exchanger 11 and the condenser assembly 8 in series, the mass flow of the rated working condition of the refrigeration cycle is confirmed to be about 6g/s according to the rated refrigerating capacity requirement by the compressor 9, and the comprehensive factors such as volumetric efficiency, pipeline loss, volume, voltage platform and the like of the compressor 9 are considered, so that the refrigerating capacity of the compressor reaches 960W under the rated working condition when the compressor is at 1000 rpm.
The compressor 9 is connected with the integrated machine 6 in parallel, the smoke sensor 4 and the condenser assembly 8 are connected in series on the integrated machine 6, the fan is an important part of the condenser assembly 8 (forced air cooling type condensing device), the fan and the condenser assembly 8 need to be matched and designed to meet the heat dissipation requirement of the condenser assembly 8, and the rated air quantity of the fan is more than or equal to 1300m 3 /h。
The condenser unit 8 is designed according to the maximum size of the space according to the principle of maximum space arrangement. And finally calculating the supercooling degree of the condenser reaching 25 ℃ at the rated refrigeration working point according to the matching fit of the condenser and the fan, and having stronger redundancy design.
An expansion valve 10 is connected in series between the plate heat exchanger 11 and the condenser assembly 8; the expansion valve is a control element for automatically adjusting the flow of the refrigerant according to the temperature and pressure change of the refrigerant at the outlet of the evaporator.
The control flow of the utility model is as follows:
as shown in fig. 2, the integrated machine 6 is mainly responsible for battery charge and discharge control, and meanwhile, battery cooling control is considered, wherein the lithium battery charge and discharge management is a general technology, and not described in detail herein, the main control flow of cooling control is that the integrated machine 6 collects temperature sensor data inside the battery, and takes corresponding cooling measures according to the temperature data inside the lithium battery pack 3, and the cooling measure is to realize cooling of the battery pack by starting the water pump 5 and the condenser assembly 8; after the temperature of the battery pack is reduced to a certain threshold value, the water pump 5 and the refrigerating unit (the condenser assembly 8) are turned off, if the temperature reduction fails, the discharging of the battery pack can be interfered in time, and the further increase of the temperature of the battery is avoided.
Workflow and implementation process
The battery pack cooling control is divided into three parts, namely cooling triggering, high-temperature power-off fault triggering, smoke concentration detection and triggering of a fire extinguishing device. The workflow is as shown in fig. 3:
the implementation process of the utility model comprises the following steps: as shown in fig. 3, after the integrated machine 6 receives a discharge request after starting up, detecting the voltage and temperature of a battery, triggering cooling control after the temperature of the battery is higher than a set threshold value for a period of time, sending an electric core high temperature alarm signal through a bus, simultaneously starting a water pump 5 and starting a refrigerating device (a condenser assembly 8) by the integrated machine 6, at the moment, pumping cooling liquid from a solution tank through a filter, a one-way valve and a ball valve by the water pump 5, and after the cooling liquid enters a heat dissipation water pipe at the bottom of the battery through a battery bottom heat dissipation water pipe and takes away part of heat, and after the cooling liquid absorbs heat, entering a plate-type heat exchanger 11 of the condenser assembly 8 through a battery liquid return port and another ball valve, performing heat exchange again in the plate-type heat exchanger 11 and a low-temperature refrigerant generated by the refrigerating unit, taking away the heat of the battery cooling liquid by the low-temperature refrigerant in the heat exchanger, forming a lower-temperature cooling liquid to flow back to the solution tank, and circulating in such a way, and stopping the water pump 5 and the refrigerating unit after the temperature in the battery is lowered to a certain value.
If the temperature of the battery pack continues to rise under the premise that the water pump 5 and the condenser assembly 8 are started, when the secondary alarm threshold is reached, the integrated machine cuts off the battery pack discharging main contactor, stops discharging outwards, and the temperature control loop stops running, meanwhile, the integrated machine detects the smoke concentration value, sends high-temperature faults and corresponding concentration data, and after the temperature is naturally reduced to be lower than the secondary threshold and a discharging command is received again, the system side can discharge outwards again.
If the temperature in the battery box body 12 reaches 100 ℃ rapidly, the fire extinguishing device 2 can decompose the fire extinguishing material under the high temperature condition to release the solid fire extinguishing medium, so that the thermal runaway condition of the battery can be relieved, and the probability of the lithium battery out of control and firing is reduced.
The comparison data of the scheme with other existing equipment of the same type is shown in fig. 4.
The above description is only illustrative of the preferred embodiments of the utility model and the technical principles employed. Meanwhile, the scope of the utility model is not limited to the technical scheme formed by the specific combination of the technical features, and other technical schemes formed by any combination of the technical features or the equivalent features thereof without departing from the inventive concept are also covered. Such as the above-mentioned features and the technical features disclosed in the present utility model (but not limited to) having similar functions are replaced with each other.
Claims (3)
1. Compact liquid cooling lithium cell group for industrial vehicle, including box (12) and lithium cell group (3), characterized by: the fire extinguishing device is characterized in that the fire extinguishing device (2) is fixed on the inner side of the box body (12) through industrial glue, the lithium battery pack (3) is fixed in the box body (12) through a buckle, a heat dissipation water pipe is paved at the bottom of the lithium battery pack (3), a water pump (5) is connected to the water inlet of the heat dissipation water pipe, a plate heat exchanger (11) is connected to the water outlet of the heat dissipation water pipe, the plate heat exchanger (11) is in sealing connection with a cooling liquid tank (7) through the water pipe, the other end of the water pump (5) is connected to the cooling liquid tank (7), a compressor (9) is connected with the plate heat exchanger (11) and a condenser assembly (8) in series respectively, a smoke sensor (4) and the condenser assembly (8) are connected to the integrated machine (6) in series, an expansion valve (10) is connected between the plate heat exchanger (11) and the condenser assembly (8) in series, and the integrated machine (6) is connected with the water pump (5).
2. The compact liquid-cooled lithium battery pack for industrial vehicles according to claim 1, characterized in that: the lithium battery pack (3) comprises a battery box, and a 1-parallel 25-string power supply system is mainly formed by connecting 1-parallel 12-string standard modules and 1-parallel 13-string standard modules in series.
3. The compact liquid-cooled lithium battery pack for industrial vehicles according to claim 1, characterized in that: the lithium battery pack (3) is connected with a main contactor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320350952.0U CN219696539U (en) | 2023-03-01 | 2023-03-01 | Compact liquid cooling lithium battery pack for industrial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320350952.0U CN219696539U (en) | 2023-03-01 | 2023-03-01 | Compact liquid cooling lithium battery pack for industrial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219696539U true CN219696539U (en) | 2023-09-15 |
Family
ID=87946024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320350952.0U Active CN219696539U (en) | 2023-03-01 | 2023-03-01 | Compact liquid cooling lithium battery pack for industrial vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219696539U (en) |
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2023
- 2023-03-01 CN CN202320350952.0U patent/CN219696539U/en active Active
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