CN106450578B - Battery package air cooling system - Google Patents
Battery package air cooling system Download PDFInfo
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- CN106450578B CN106450578B CN201611122413.2A CN201611122413A CN106450578B CN 106450578 B CN106450578 B CN 106450578B CN 201611122413 A CN201611122413 A CN 201611122413A CN 106450578 B CN106450578 B CN 106450578B
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- guide plate
- battery pack
- mcu
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- 238000001816 cooling Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000003750 conditioning effect Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 10
- 101710179738 6,7-dimethyl-8-ribityllumazine synthase 1 Proteins 0.000 claims description 3
- 101710186608 Lipoyl synthase 1 Proteins 0.000 claims description 3
- 101710137584 Lipoyl synthase 1, chloroplastic Proteins 0.000 claims description 3
- 101710090391 Lipoyl synthase 1, mitochondrial Proteins 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 abstract description 4
- 230000000191 radiation effect Effects 0.000 abstract description 4
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 description 10
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 10
- 230000017525 heat dissipation Effects 0.000 description 10
- 229910052744 lithium Inorganic materials 0.000 description 10
- 239000000523 sample Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 239000013078 crystal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 241000282472 Canis lupus familiaris Species 0.000 description 3
- 238000005213 imbibition Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—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
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The application provides a battery pack air cooling system which comprises a box body, a fan, a first guide plate, a second guide plate and a third guide plate, wherein the fan is positioned outside the box body and is communicated with the inside of the box body through a guide pipe; the air outlet of the fan is communicated with the first diversion air channel through the diversion pipe, and the second diversion air channel is communicated with the outside through the diversion pipe. The application can radiate and waterproof the battery pack, and has balanced radiation, simple structure and good radiation effect.
Description
Technical Field
The application relates to the technical field of electronic circuits of electric automobiles, in particular to a battery pack air cooling system.
Background
As the energy supply source of the electric devices in large-scale equipment such as electric automobiles, motorcycles, motorboats and the like, the chemical side reaction and the internal resistance of the power lithium battery can generate a large amount of heat in the charging and discharging process, if the power lithium battery is in a high-temperature environment for a long time, the charging and discharging performance and the working life of the power lithium battery can be greatly reduced, and the power lithium battery can be covered with a belt to ensure safety hidden trouble. In order to enable the single batteries in the battery pack to work in a normal temperature range, a heat dissipation system is generally designed in the battery pack, and the problems of unbalanced heat dissipation and poor heat dissipation effect generally occur in the air-cooled heat dissipation system adopted by the power lithium battery pack of the domestic electric automobile at present.
Meanwhile, the air-cooled heat dissipation system is characterized in that external air is led into the battery pack and heat exchange is carried out, so that the single lithium battery in the battery pack is in an unsealed state, and the possibility that liquid outside the battery pack enters the battery pack through the air guide pipeline exists, and particularly for the battery pack applied to large-scale water traffic equipment such as motorboats, the risk that the liquid outside the battery pack enters the battery pack through the air guide pipeline is higher; in order to solve the technical problem that external liquid enters the battery pack through the air guide pipeline, a baffle is generally arranged in the air guide pipe at present, or the air inlet pipe is arranged into two sections with corners and is provided with an imbibition part at the corners, and the liquid entering the air inlet pipe is blocked and imbibed through the imbibition part, so that the liquid can be prevented from further entering the battery pack to a certain extent, and the waterproof effect is not ideal. Therefore, how to prevent the liquid such as the moisture outside the battery pack from entering the battery pack, so as to avoid the short circuit of the single battery and the damage of other electronic components in the battery pack is a technical problem to be solved.
Disclosure of Invention
The application aims to provide the battery pack air cooling system with simple structure and good heat dissipation effect, which can dissipate heat of a battery pack in the charging and discharging process of a power lithium battery and has balanced heat dissipation; meanwhile, the technical problem that liquid such as water outside the battery pack enters the battery pack is solved, and the waterproof effect is good.
The technical scheme of the application is as follows:
the battery pack air cooling system comprises a box body, a fan which is positioned outside the box body and communicated with the inside of the box body through a flow guide pipe, wherein a first flow guide plate and a second flow guide plate are connected between the front side surface and the rear side surface of an inner cavity of the box body; the first guide plate, the second guide plate and the third guide plate divide the inner cavity of the box body into a first guide air channel, a battery assembly cavity, a second guide air channel and a third guide air channel, the first guide air channel is communicated with the third guide air channel through a first guide hole formed in the position, close to the bottom end, of the first guide plate, the third guide air channel is communicated with the battery assembly cavity through a third guide hole formed in the third guide plate, and the battery assembly cavity is communicated with the second guide plate through a second guide hole formed in the second guide plate; the air outlet of the fan is communicated with the first diversion air channel through the diversion pipe, and the second diversion air channel is communicated with the outside through the diversion pipe.
The plurality of third guide plates are arranged in parallel between the first guide plates and the second guide plates and are positioned on the same plane; the third guide air duct is also communicated with the battery assembly cavity through gaps among the third guide plates.
The battery pack air cooling system further comprises a fan cover, and the fan cover is connected with an air inlet of the fan through an air pouring pipe.
The battery pack air cooling system further comprises a waterproof device arranged outside the box body, the waterproof device comprises a water sensor arranged on the outer wall of the box body and flush with the bottom wall of the box body, a control chip arranged in the box body and in communication connection with the water sensor, and an electromagnetic valve arranged on the flow guide pipe and in communication connection with the control chip, the water sensor is used for detecting the water level and converting the water level signal into a voltage signal and transmitting the voltage signal to a control chip MCU, and the control chip MCU is used for receiving the voltage signal and controlling the on-off of the electromagnetic valve.
The waterproof device also comprises an electromagnetic valve driving circuit connected between the control chip MCU and the electromagnetic valve, the electromagnetic valve driving circuit comprises a photoelectric coupler U and a relay LS1, the anode of the photoelectric coupler U3 is connected with a power supply VDD1 through a resistor R6, the cathode is connected with the power supply VDD1 through a resistor R7, the collector is connected with a power supply VDD2, and the emitter is connected with the base of a triode Q1 through a resistor R8; the base electrode of the triode Q1 is also connected with the ground through a resistor R9, the emitter electrode of the triode Q1 is connected with the ground, and the collector electrode of the triode Q1 is connected with a power supply VDD2 through a diode D1; the first terminal of relay LS1 is connected with the collector of photocoupler U3, the sixth terminal is connected with power VDD2, the fourth terminal is connected with power VDD4, and the third terminal is the control signal output.
The electromagnetic valve driving circuit is divided into three parts, namely a control signal output part formed by a resistor R6, a resistor R7 and a photoelectric coupler U3, a driving part formed by a resistor R8, a resistor R9 and a triode Q1, and a control part formed by a diode D1 and a relay LS 1; the photoelectric coupler U3 plays an isolating role, and the photoelectric coupler U3 in an off state can prevent a control signal from entering the driving part from the control signal output part, so that high-frequency interference of the driving part is restrained from entering the control part; when the control signal makes the anode and the cathode of the electric coupler U3 conduct in a low level mode, the collector and the emitter of the electric coupler U3 conduct, the resistor R8 is used for dividing voltage, the triode Q1 conducts, the current is output to drive the relay LS1, and the diode D1 forms a discharging path when the relay LS1 is closed, so that the triode Q1 is prevented from being damaged.
The control chip MCU (also called a control chip or a singlechip, abbreviated as MCU) is used as a micro control unit and is a data processing and control core of the waterproof device. In the application, the control chip MCU is used for obtaining a voltage value and controlling the on-off of the electromagnetic valve 3 according to the voltage value.
The control chip MCU is used for sending a closing signal to the electromagnetic valve under the condition of receiving the voltage signal.
The control chip MCU is used for receiving the voltage signal and acquiring a voltage value; and sending a closing signal to the electromagnetic valve when the voltage value is greater than or equal to the threshold value, or/and sending an opening signal to the electromagnetic valve when the voltage value is less than the threshold value.
The control chip MCU is also used for acquiring the internal temperature value of the battery pack through the CAN bus, and sending a closing signal to the electromagnetic valve under the condition that the internal temperature value of the battery pack is lower than a preset value.
The waterproof device also comprises a signal conditioning circuit connected between the water sensor and the control chip MCU and an A/D signal conversion circuit connected between the signal conditioning circuit and the control chip MCU, wherein the signal conditioning circuit comprises an in-phase amplifier U1 and a voltage follower U2, the in-phase input end of the in-phase amplifier U1 is connected with the voltage signal input end VIN through a resistor R1 and is grounded through a capacitor C1, and the anti-phase input end of the in-phase amplifier U1 is grounded through a resistor R3 and is connected with the output end of the in-phase amplifier U1 through a resistor R5; the non-inverting input end of the voltage follower U2 is connected with the output end of the non-inverting amplifier U1 through a resistor R2 and is grounded through a capacitor C2, the inverting input end of the voltage follower U2 is connected with the input end of the voltage follower U2, and the output end of the voltage follower U2 is connected with the voltage signal output end through a resistor R4.
The signal conditioning circuit is divided into a primary in-phase amplifying circuit formed by a resistor R1, a capacitor C1, an in-phase amplifier U1 and a resistor R5 and a primary voltage following circuit formed by a resistor R4, a capacitor C2, a voltage follower U2 and a resistor R4; the voltage signal output by the water sensor enters the in-phase amplifier U1 after being filtered by the low-pass filter composed of the resistor R1 and the capacitor C2, the voltage signal is amplified by the in-phase amplifier U1 and then is output to the low-pass filter composed of the resistor R2 and the capacitor C2 and enters the voltage follower U2, the output impedance is reduced by the voltage follower U2 and then is output to the A/D signal conversion circuit, and the A/D signal conversion circuit carries out analog-to-digital conversion.
The waterproof device further comprises a RESET circuit connected with the control chip MCU, the RESET circuit comprises a RESET chip U4, a first wiring terminal of the RESET chip U4 is connected with a RESET end RESET of the control chip MCU, the waterproof device is further connected with a power supply VDD1 through a resistor R10 and is grounded through a capacitor C3, a fourth wiring terminal is connected with the first wiring terminal of the control chip MCU, a fifth wiring terminal of the RESET chip U4 is connected with the power supply VDD1 and is grounded through the capacitor C4, and a second wiring terminal is grounded.
The control chip is easy to be interfered by external environment in the running process, so that the internal program runs to fall into dead loop or the internal program is interrupted to fall into a stagnation state, and the reset circuit is mainly used for resetting the control chip when the control chip is in the above condition. When the control chip MCU is in a working mode, the control chip MCU continuously outputs a signal of feeding dogs to the reset chip U4 through the first wiring terminal, and the reset chip U4 detects a change of a high level and a low level once through the fourth wiring terminal to indicate that the feeding dogs are successfully fed once; if the reset chip U4 does not detect the one-time dog feeding signal within 1.6s through the fourth wiring terminal, the first wiring terminal on the reset chip U4 outputs a reset signal and outputs the reset signal to the control chip MCU, so that the program running of the control chip MCU is restored to the state of executing from the initial position of the program memory.
In the battery pack air cooling system, external air enters a fan through a fan cover, high-pressure air generated by the fan enters a first guide air channel through a guide pipe, flows downwards to enter a third guide air channel through a first guide hole at the lower end of a first guide plate, and flows entering the third guide air channel enter a battery assembly cavity through third guide holes uniformly distributed on the third guide plate and gaps among a plurality of third guide plates, so that the uniformly-rising high-pressure air flows take away a large amount of heat on the surface of a single battery in the battery assembly cavity, enter the guide pipe through a second guide plate and are discharged through the guide pipe, and the process of air cooling and heat dissipation of the battery pack is completed.
In the waterproof device, the two-stage probe is insulated by air in a normal state of the water sensor, and the probe is conducted in a soaking state; the water sensor converts water level information into voltage signals rapidly in a soaking state, the voltage signals are filtered and amplified by the signal conditioning circuit and then transmitted to the A/D signal conversion circuit, the voltage signals are converted into digital signals by the A/D signal conversion circuit and then output to the control chip, and the control chip controls the on-off of the electromagnetic valve according to the voltage signals, and the water sensor comprises the following three conditions:
firstly, after receiving a voltage signal, the control chip immediately sends a closing signal to the electromagnetic valve, the electromagnetic valve is immediately closed, and meanwhile, the battery pack air cooling system stops working, so that external moisture is effectively prevented from entering the battery pack air cooling system; secondly, after the control chip analyzes the voltage signal and acquires the voltage value, judging whether the voltage value is larger than or equal to a threshold value, and sending a closing signal to the electromagnetic valve under the condition that the voltage value is larger than or equal to the threshold value, and simultaneously stopping the operation of the battery pack air cooling system, and sending an opening signal to the electromagnetic valve under the condition that the voltage value acquired by the control chip again is smaller than the threshold value, so that the opening and closing of the electromagnetic valve are intelligently controlled, and external moisture is effectively prevented from entering the battery pack air cooling system; thirdly, the control chip obtains the internal temperature value of the battery pack through the CAN bus, if the internal temperature value of the battery pack is lower than a preset value, the internal part of the battery pack does not need to be cooled by air cooling, the control chip sends a closing signal to the electromagnetic valve, the electromagnetic valve is closed, the air cooling system of the battery pack stops working, and external moisture is prevented from entering the internal part of the air cooling system of the battery pack.
The application has the beneficial effects that:
1. the application can radiate a large amount of heat generated in the charge and discharge process of the high-power lithium battery, has balanced radiation, good radiation effect and simple structure;
2. the application can intelligently control the opening and closing of the electromagnetic valve according to the water immersion information sensed by the water sensor, effectively solves the technical problem that liquid such as water outside the battery pack enters the battery pack, ensures that the battery pack is charged and discharged normally, and prolongs the service life of the battery.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 is a schematic structural diagram of a battery pack air cooling system according to the present application;
FIG. 2 is a left side view of FIG. 1;
fig. 3 is a schematic view of a waterproof device according to an embodiment of the present application;
fig. 4 is a schematic view of a waterproof device according to a second embodiment of the present application;
FIG. 5 is a schematic diagram of a signal conditioning circuit according to the present application;
FIG. 6 is a schematic diagram of a reset circuit according to the present application;
fig. 7 is a schematic diagram of a solenoid valve driving circuit according to the present application.
Detailed Description
Embodiments of the application are described in detail below with reference to the attached drawings, but the application can be implemented in a number of different ways, which are defined and covered by the claims.
Example 1
As shown in fig. 1 and fig. 2, a battery pack air cooling system comprises a box body 1, a fan 2, a fan cover 12 and a waterproof device, wherein the fan 2 is positioned outside the box body 1 and communicated with the inside of the box body through a flow guide pipe, the fan cover 12 is connected with an air inlet of the fan 2 through a reverse air pipe, and the waterproof device is arranged outside the box body 1.
A first guide plate 4 and a second guide plate 6 are connected between the front side surface and the rear side surface of the inner cavity of the box body 1, the top end of the first guide plate 4 and the top end of the second guide plate 6 are both connected to the top wall of the inner cavity of the box body, the bottom end of the first guide plate 4 and the bottom end of the second guide plate 6 are both connected to the bottom wall of the inner cavity of the box body, and three third guide plates 5 are connected between the first guide plate 4 and the second guide plate 6 and close to the bottom of the inner cavity of the box body; three third deflectors 5 are arranged in parallel between the first deflector 4 and the second deflector 6 and on the same plane.
The first guide plate 4, the second guide plate 6 and the third guide plate 5 divide the inner cavity of the box body into a first guide air channel 7, a battery assembly cavity 8, a second guide air channel 9 and a third guide air channel 10, the first guide air channel 7 is communicated with the third guide air channel 10 through a first guide hole 11-1 formed in the position, close to the bottom end, of the first guide plate 4, the third guide air channel 10 is communicated with the battery assembly cavity 8 through a third guide hole 11-3 formed in the third guide plate 5 and gaps among the three third guide plates 5, and the battery assembly cavity 8 is communicated with the second guide plate 6 through a second guide hole 11-2 formed in the second guide plate 6; the air outlet of the fan is communicated with the first diversion air channel 7 through a diversion pipe, and the second diversion air channel 9 is communicated with the outside through a diversion pipe.
As shown in fig. 3, the waterproof device comprises a water sensor 13 installed on the outer wall of the box body 1 and flush with the bottom wall of the box body 1, a control chip MCU installed in the box body 1 and in communication connection with the water sensor 13, an electromagnetic valve 3 installed on the flow guide pipe and in communication connection with the control chip MCU, and an electromagnetic valve driving circuit connected between the control chip MCU and the electromagnetic valve 3.
In this embodiment, the water sensor 13 is a voltage type water sensor, the two-stage probe is insulated by air in a normal state, and the probe is turned on in a submerged state, and voltage variation is output according to water level variation, i.e. the water level signal is converted into a voltage signal and transmitted to the control chip MCU, and the control chip MCU sends a closing signal to the solenoid valve 3 when receiving the voltage signal. The control chip MCU generally adopts a 16-bit high-performance singlechip of Feishukar, and the performance of the control chip MCU comprises: the highest operating frequency can reach 50MHz;256K Flash,16K RAM,4K EEPROM,32K D-Flash;3 CAN interfaces of 2.0B; a 12bit ADC of 8 channels; 3.1V-5.5V power supply, a plurality of GPIO; inputting an external crystal oscillator frequency range: 2MHz to 40MHz; the power supply pins are connected in parallel with decoupling capacitors; the externally connected resonator is a 16MHz crystal resonator with a precision of + -20 ppm and a load capacitance of 16pF.
As shown in fig. 7, the electromagnetic valve driving circuit comprises a photoelectric coupler U3 and a relay LS1, wherein the anode of the photoelectric coupler U3 is connected with a power supply VDD1 through a resistor R6, the cathode is connected with the power supply VDD1 through a resistor R7, the collector is connected with a power supply VDD2, and the emitter is connected with the base of a triode Q1 through a resistor R8; the base electrode of the triode Q1 is also connected with the ground through a resistor R9, the emitter electrode of the triode Q1 is connected with the ground, and the collector electrode of the triode Q1 is connected with a power supply VDD2 through a diode D1; the first terminal of relay LS1 is connected with the collector of photocoupler U3, the sixth terminal is connected with power VDD2, the fourth terminal is connected with power VDD4, and the third terminal is the control signal output.
In this embodiment, external air enters the fan through the fan housing, high-pressure air flow generated by the fan 2 enters the first diversion air duct 7 through the diversion pipe, flows downwards through the first diversion hole 11-1 at the lower end of the first diversion plate 4 and enters the third diversion air duct 10, air flow entering the third diversion air duct 10 enters the battery assembly cavity 8 through gaps among the third diversion holes 11-3 uniformly distributed on the third diversion plate 5 and the plurality of third diversion plates 5, and the uniformly-rising high-pressure air flow is carried away from a large amount of heat on the surface of a single battery in the battery assembly cavity 8, enters the diversion pipe through the second diversion plate 6 and is discharged through the diversion pipe, so that the air cooling and heat dissipation process of the battery pack is completed. Therefore, the application can radiate a large amount of heat generated in the charge and discharge process of the high-power lithium battery, and has balanced radiation and good radiation effect.
In this embodiment, the water sensor 13 is insulated by air in the two stages of probes in the normal state, and the probes are turned on in the immersed state; the water sensor rapidly converts water level information into a voltage signal and outputs the voltage signal to the control chip MCU, the control chip MCU immediately sends a closing signal to the electromagnetic valve 3 after receiving the voltage signal, the electromagnetic valve 3 is immediately closed, and meanwhile, the battery pack air cooling system stops working, so that the application can effectively prevent external moisture from entering the battery pack air cooling system.
Example two
As shown in fig. 1 and fig. 2, a battery pack air cooling system comprises a box body 1, a fan 2, a fan cover 12 and a waterproof device, wherein the fan 2 is positioned outside the box body 1 and communicated with the inside of the box body through a flow guide pipe, the fan cover 12 is connected with an air inlet of the fan 2 through a reverse air pipe, and the waterproof device is arranged outside the box body 1.
A first guide plate 4 and a second guide plate 6 are connected between the front side surface and the rear side surface of the inner cavity of the box body 1, the top end of the first guide plate 4 and the top end of the second guide plate 6 are both connected to the top wall of the inner cavity of the box body, the bottom end of the first guide plate 4 and the bottom end of the second guide plate 6 are both connected to the bottom wall of the inner cavity of the box body, and three third guide plates 5 are connected between the first guide plate 4 and the second guide plate 6 and close to the bottom of the inner cavity of the box body; three third deflectors 5 are arranged in parallel between the first deflector 4 and the second deflector 6 and on the same plane.
The first guide plate 4, the second guide plate 6 and the third guide plate 5 divide the inner cavity of the box body into a first guide air channel 7, a battery assembly cavity 8, a second guide air channel 9 and a third guide air channel 10, the first guide air channel 7 is communicated with the third guide air channel 10 through a first guide hole 11-1 formed in the position, close to the bottom end, of the first guide plate 4, the third guide air channel 10 is communicated with the battery assembly cavity 8 through a third guide hole 11-3 formed in the third guide plate 5 and gaps among the three third guide plates 5, and the battery assembly cavity 8 is communicated with the second guide plate 6 through a second guide hole 11-2 formed in the second guide plate 6; the air outlet of the fan is communicated with the first diversion air channel 7 through a diversion pipe, and the second diversion air channel 9 is communicated with the outside through a diversion pipe.
As shown in fig. 4, the waterproof device comprises a water sensor 13, a signal conditioning circuit, an a/D signal conversion circuit, a control chip MCU, an electromagnetic valve driving circuit, an electromagnetic valve 3 and a reset circuit, wherein the water sensor 13 is arranged on the outer wall of the box body 1 and is flush with the bottom wall of the box body 1, the signal conditioning circuit is in communication connection with the water sensor 13, the control chip MCU is arranged in the box body 1 and is in communication connection with the a/D signal conversion circuit, the electromagnetic valve driving circuit is in communication connection with the control chip MCU, the electromagnetic valve 3 is arranged on the guide pipe and is in communication connection with the control chip MCU, and the reset circuit is connected with the control chip MCU.
In this embodiment, the water sensor 13 is a voltage type water sensor, the two-stage probe is insulated by air in a normal state, and the probe is turned on in a submerged state, and outputs a voltage change according to a water level change, and converts a water level signal into a voltage signal and transmits the voltage signal to the signal conditioning circuit.
In this embodiment, the control chip MCU generally adopts a 16-bit high-performance singlechip with the performance of feishaper, including: the highest operating frequency can reach 50MHz;256K Flash,16K RAM,4K EEPROM,32K D-Flash;3 CAN interfaces of 2.0B; a 12bit ADC of 8 channels; 3.1V-5.5V power supply, a plurality of GPIO; inputting an external crystal oscillator frequency range: 2MHz to 40MHz; the power supply pins are connected in parallel with decoupling capacitors; the externally connected resonator is a 16MHz crystal resonator with a precision of + -20 ppm and a load capacitance of 16pF. The control chip MCU is used for receiving the voltage signal and acquiring a voltage value; in the case where the voltage value is greater than or equal to the threshold value, a closing signal is sent to the solenoid valve 3, and in the case where the voltage value is less than the threshold value, an opening signal is sent to the solenoid valve 3. The control chip MCU is also used for acquiring the internal temperature value of the battery pack through the CAN bus, and sending a closing signal to the electromagnetic valve 3 under the condition that the internal temperature value of the battery pack is lower than a preset value.
As shown in fig. 5, the signal conditioning circuit includes an in-phase amplifier U1 and a voltage follower U2, wherein the in-phase input end of the in-phase amplifier U1 is connected with the voltage signal input end VIN through a resistor R1 and is grounded through a capacitor C1, and the anti-phase input end of the in-phase amplifier U1 is grounded through a resistor R3 and is connected with the output end of the in-phase amplifier U1 through a resistor R5; the non-inverting input end of the voltage follower U2 is connected with the output end of the non-inverting amplifier U1 through a resistor R2 and is grounded through a capacitor C2, the inverting input end of the voltage follower U2 is connected with the input end of the voltage follower U2, and the output end of the voltage follower U2 is connected with the voltage signal output end through a resistor R4.
As shown in fig. 7, the electromagnetic valve driving circuit comprises a photoelectric coupler U3 and a relay LS1, wherein the anode of the photoelectric coupler U3 is connected with a power supply VDD1 through a resistor R6, the cathode is connected with the power supply VDD1 through a resistor R7, the collector is connected with a power supply VDD2, and the emitter is connected with the base of a triode Q1 through a resistor R8; the base electrode of the triode Q1 is also connected with the ground through a resistor R9, the emitter electrode of the triode Q1 is connected with the ground, and the collector electrode of the triode Q1 is connected with a power supply VDD2 through a diode D1; the first terminal of relay LS1 is connected with the collector of photocoupler U3, the sixth terminal is connected with power VDD2, the fourth terminal is connected with power VDD4, and the third terminal is the control signal output.
As shown in fig. 6, the RESET circuit includes a RESET chip U4, a first terminal of the RESET chip U4 is connected to a RESET terminal RESET of the control chip MCU, and is further connected to the power supply VDD1 through a resistor R10 and to ground through a capacitor C3, a fourth terminal is connected to the first terminal of the control chip MCU, a fifth terminal of the RESET chip U4 is connected to the power supply VDD1 and to ground through a capacitor C4, and a second terminal is connected to ground. The reset chip U4 is also a monitor chip, and in this embodiment, an STM6824TWY F type monitor chip of an legal semiconductor company is adopted, when the detection voltage is 3.08V, a reset signal is output when the chip detects that the power supply voltage is lower than 3.08V, so that the control chip resets.
In this embodiment, external air enters the fan through the fan housing, high-pressure air flow generated by the fan 2 enters the first diversion air duct 7 through the diversion pipe, flows downwards through the first diversion hole 11-1 at the lower end of the first diversion plate 4 and enters the third diversion air duct 10, air flow entering the third diversion air duct 10 enters the battery assembly cavity 8 through gaps among the third diversion holes 11-3 uniformly distributed on the third diversion plate 5 and the plurality of third diversion plates 5, and the uniformly-rising high-pressure air flow is carried away from a large amount of heat on the surface of a single battery in the battery assembly cavity 8, enters the diversion pipe through the second diversion plate 6 and is discharged through the diversion pipe, so that the air cooling and heat dissipation process of the battery pack is completed. Therefore, the application can radiate a large amount of heat generated in the charge and discharge process of the high-power lithium battery, and has balanced radiation and good radiation effect.
In this embodiment, the water sensor 13 is insulated by air in the two stages of probes in the normal state, and the probes are turned on in the immersed state; the water sensor 13 in the immersed state rapidly converts the water level information into a voltage signal, the voltage signal is filtered and amplified by the signal conditioning circuit and then is transmitted to the A/D signal conversion circuit, the voltage signal is converted into a digital signal by the A/D signal conversion circuit and then is output to the control chip, the control chip analyzes the voltage signal and acquires a voltage value, and then judges whether the voltage value is greater than or equal to a threshold value, and if the voltage value is greater than or equal to the threshold value, a closing signal is sent to the electromagnetic valve 3, and meanwhile, the battery pack air cooling system stops working; when the voltage value obtained by the control chip again is smaller than the threshold value, an opening signal is sent to the electromagnetic valve 3, the electromagnetic valve 3 is opened, and the battery pack air cooling system works and dissipates heat, so that the application can effectively intelligently control the opening and closing of the electromagnetic valve 3, thereby preventing external moisture from entering the battery pack air cooling system; meanwhile, the control chip MCU also obtains the internal temperature value of the battery pack through the CAN bus, if the internal temperature value of the battery pack is lower than a preset value, the battery pack does not need to be cooled by air cooling, the control chip MCU sends a closing signal to the electromagnetic valve 3, the electromagnetic valve 3 is closed, the battery pack air cooling system stops working, and external moisture is prevented from entering the battery pack air cooling system.
Claims (9)
1. The utility model provides a battery package forced air cooling system, is including box (1), be located outside box (1) and through fan (2) and the setting of honeycomb duct and the outside watertight fittings of box (1), its characterized in that:
a first guide plate (4) and a second guide plate (6) are connected between the front side surface and the rear side surface of the inner cavity of the box body (1), the top end of the first guide plate (4) and the top end of the second guide plate (6) are both connected to the top wall of the inner cavity of the box body, the bottom end of the first guide plate (4) and the bottom end of the second guide plate (6) are both connected to the bottom wall of the inner cavity of the box body, and one or more third guide plates (5) are connected between the first guide plate (4) and the second guide plate (6) and close to the bottom of the inner cavity of the box body;
the box body inner cavity is divided into a first guide air channel (7), a battery assembly cavity (8), a second guide air channel (9) and a third guide air channel (10) by the first guide plate (4), the second guide air channel (6) and the third guide air channel (5), the first guide air channel (7) is communicated with the third guide air channel (10) through a first guide hole (11-1) formed in the position, close to the bottom end, of the first guide plate (4), the third guide air channel (10) is communicated with the battery assembly cavity (8) through a third guide hole (11-3) formed in the third guide plate (5), and the battery assembly cavity (8) is communicated with the second guide plate (6) through a second guide hole (11-2) formed in the second guide plate (6);
the air outlet of the fan is communicated with the first diversion air channel (7) through a diversion pipe, and the second diversion air channel (9) is communicated with the outside through a diversion pipe;
the waterproof device comprises a water inductor (13) arranged on the outer wall of the box body (1) and flush with the bottom wall of the box body (1), a control chip (MCU) arranged in the box body (1) and in communication connection with the water inductor (13) and an electromagnetic valve (3) arranged on the guide pipe and in communication connection with the control chip (MCU), wherein the water inductor (13) is used for detecting water level and converting the water level signal into a voltage signal and transmitting the voltage signal to the control chip (MCU), and the control chip (MCU) is used for receiving the voltage signal and controlling the on-off of the electromagnetic valve (3).
2. A battery pack air cooling system as defined in claim 1, wherein:
the plurality of third guide plates (5) are arranged in parallel between the first guide plates (4) and the second guide plates (6) and are positioned on the same plane; the third guide air duct (10) is also communicated with the battery assembly cavity (8) through gaps among the third guide plates (5).
3. A battery pack air cooling system as defined in claim 1, wherein:
the air conditioner further comprises an air cover (12), and the air cover (12) is connected with an air inlet of the fan (2) through an air pouring pipe.
4. A battery pack air cooling system as defined in claim 1, wherein:
the waterproof device further comprises an electromagnetic valve driving circuit connected between the control chip (MCU) and the electromagnetic valve (3), the electromagnetic valve driving circuit comprises a photoelectric coupler (U3) and a relay (LS 1), the anode of the photoelectric coupler (U3) is connected with a power supply (VDD 1) through a resistor (R6), the cathode is connected with the power supply (VDD 1) through a resistor (R7), the collector is connected with a power supply (VDD 2), and the emitter is connected with the base of the triode (Q1) through a resistor (R8); the base electrode of the triode (Q1) is also connected with the ground through a resistor (R9), the emitter electrode of the triode (Q1) is connected with the ground, and the collector electrode of the triode (Q1) is connected with a power supply (VDD 2) through a diode (D1); a first terminal of the relay (LS 1) is connected with a collector electrode of the photoelectric coupler (U3), a sixth terminal of the relay is connected with a power supply (VDD 2), a fourth terminal of the relay is connected with a power supply (VDD 4), and a third terminal of the relay is a control signal output end.
5. A battery pack air cooling system as defined in claim 4 wherein:
the control chip (MCU) is used for sending a closing signal to the electromagnetic valve (3) under the condition of receiving the voltage signal.
6. A battery pack air cooling system as defined in claim 4 wherein:
the control chip (MCU) is used for receiving the voltage signal and acquiring a voltage value; and sending a closing signal to the electromagnetic valve (3) when the voltage value is greater than or equal to the threshold value, or/and sending an opening signal to the electromagnetic valve (3) when the voltage value is less than the threshold value.
7. A battery pack air cooling system as defined in claim 6, wherein:
the control chip (MCU) is also used for acquiring the internal temperature value of the battery pack through the CAN bus, and sending a closing signal to the electromagnetic valve (3) under the condition that the internal temperature value of the battery pack is lower than a preset value.
8. A battery pack air cooling system as defined in claim 4 wherein:
the waterproof device further comprises a signal conditioning circuit connected between the water sensor (13) and the control chip (MCU) and an A/D signal conversion circuit connected between the signal conditioning circuit and the control chip (MCU), the signal conditioning circuit comprises an in-phase amplifier (U1) and a voltage follower (U2), the in-phase input end of the in-phase amplifier (U1) is connected with a voltage signal input end (VIN) through a resistor (R1) and is grounded through a capacitor (C1), and the anti-phase input end of the in-phase amplifier (U1) is grounded through a resistor (R3) and is connected with the output end of the in-phase amplifier (U1) through a resistor (R5); the non-inverting input end of the voltage follower (U2) is connected with the output end of the non-inverting amplifier (U1) through a resistor (R2) and is connected with the ground through a capacitor (C2), the inverting input end of the voltage follower (U2) is connected with the input end of the voltage follower (U2), and the output end of the voltage follower (U2) is connected with the voltage signal output end through a resistor (R4).
9. A battery pack air cooling system as defined in claim 4 wherein:
the waterproof device further comprises a RESET circuit connected with the control chip (MCU), the RESET circuit comprises a RESET chip (U4), a first wiring end of the RESET chip (U4) is connected with a RESET end (RESET) of the control chip (MCU), the waterproof device is further connected with a power supply (VDD 1) through a resistor (R10) and is connected with the ground through a capacitor (C3), a fourth wiring end is connected with a first wiring end of the control chip (MCU), a fifth wiring end of the RESET chip (U4) is connected with the power supply (VDD 1) and is connected with the ground through the capacitor (C4), and a second wiring end is connected with the ground.
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| CN201611122413.2A CN106450578B (en) | 2016-12-08 | 2016-12-08 | Battery package air cooling system |
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| CN108493381B (en) * | 2018-05-15 | 2024-04-02 | 华霆（合肥）动力技术有限公司 | Air cooling system and battery system |
| CN110867626B (en) * | 2018-08-28 | 2021-06-01 | 郑州宇通客车股份有限公司 | Battery cooling device and control method thereof |
| CN110867627B (en) * | 2018-08-28 | 2021-06-01 | 郑州宇通客车股份有限公司 | Battery cooling device |
| CN109755675B (en) * | 2019-01-10 | 2021-06-22 | 中国铁塔股份有限公司四川省分公司 | Battery BMS protocol management system |
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| CN101924259B (en) * | 2010-08-24 | 2013-03-13 | 上海中科深江电动车辆有限公司 | Power battery double-circulation air-cooled heat radiation method and device with function of temperature difference control |
| CN202259596U (en) * | 2011-10-19 | 2012-05-30 | 上海恒动汽车电池有限公司 | Battery pack system with module built-in air ducts |
| CN202488948U (en) * | 2012-01-19 | 2012-10-10 | 北京自动化控制设备研究所 | External circulating cooling device for sealed box |
| CN102623770A (en) * | 2012-03-21 | 2012-08-01 | 河南科隆集团有限公司 | Power battery heat radiator |
| CN202721213U (en) * | 2012-08-24 | 2013-02-06 | 长沙国容新能源有限公司 | Power supply module box body structure with heat dissipation function improvable |
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| CN203721841U (en) * | 2013-12-26 | 2014-07-16 | 上海航天电源技术有限责任公司 | Air-cooling heat dissipation structure of power battery pack system |
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Effective date of registration: 20240329 Address after: 246000 Gaosong Village, Changfeng Township, Yingjiang District, Anqing City, Anhui Province Patentee after: Wang Yijun Country or region after: China Address before: Room 307, building A1, luguyuyuan, No. 27, Wenxuan Road, high tech Development Zone, Changsha City, Hunan Province, 410003 Patentee before: HUNAN XIAOBU TECHNOLOGY CO.,LTD. Country or region before: China |