CN113635769A - New energy automobile safety protection system - Google Patents
New energy automobile safety protection system Download PDFInfo
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- CN113635769A CN113635769A CN202111194841.7A CN202111194841A CN113635769A CN 113635769 A CN113635769 A CN 113635769A CN 202111194841 A CN202111194841 A CN 202111194841A CN 113635769 A CN113635769 A CN 113635769A
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- battery
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- 238000001816 cooling Methods 0.000 claims abstract description 46
- 230000007246 mechanism Effects 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 52
- 239000000126 substance Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Classifications
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- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S5/00—Servicing, maintaining, repairing, or refitting of vehicles
- B60S5/06—Supplying batteries to, or removing batteries from, vehicles
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Mechanical Engineering (AREA)
- Sustainable Development (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of new energy vehicles, and discloses a safety protection system of a new energy vehicle, which comprises a battery compartment, wherein a plurality of bin positions for containing battery modules are arranged in the battery compartment; a first temperature sensor and a pressure sensor are arranged at the air inlet, a second temperature sensor is arranged at the air outlet, and the first temperature sensor, the pressure sensor and the second temperature sensor are connected with a battery temperature controller; the battery temperature controller calculates the air outlet gas pressure of the battery compartment at the current time by establishing a leakage reference model and judges the leakage state of the battery compartment by contrasting the leakage reference model; the invention can accurately detect the leakage state of the battery compartment, so that the leakage of the battery compartment can be found in time, thereby avoiding the fault of a cooling system and ensuring the safety of an automobile.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a safety protection system of a new energy automobile.
Background
The battery pack of the new energy automobile adopts the high-energy lithium battery, so that the temperature of the battery compartment needs to be controlled to ensure the use safety of the automobile, most of the battery compartment of the automobile adopts an air cooling mode for heat dissipation, and the damage of the battery compartment can occur in the driving process of the automobile, so that the fluid circulation in the battery compartment is damaged, and the work of a battery cooling system is influenced.
Disclosure of Invention
The invention provides a new energy automobile safety protection system, which solves the technical problem that the work of a battery cooling system is influenced due to the fact that a battery bin is damaged and leaked in the related technology.
According to one aspect of the invention, the new energy automobile safety protection system comprises a battery compartment, wherein a plurality of compartment positions for containing battery modules are arranged in the battery compartment, an air inlet and an air outlet are correspondingly formed in two sides of the battery compartment, and a fan for forming air flow in the battery compartment is arranged on the air inlet and/or the air outlet;
a first temperature sensor and a pressure sensor are arranged at the air inlet, a second temperature sensor is arranged at the air outlet, and the first temperature sensor, the pressure sensor and the second temperature sensor are connected with a battery temperature controller; the battery temperature controller comprises a data acquisition unit, a model establishment unit, a current pressure calculation unit and a leakage comparison unit, wherein the data acquisition unit is used for receiving data acquired by a first temperature sensor, a pressure sensor and a second temperature sensor, the model establishment unit is used for establishing a leakage-free model in a leakage-free state and a standard leakage model in a leakage state of the battery compartment, and a leakage reference model is obtained through the leakage-free model and the standard leakage model;
The current pressure calculating unit is used for calculating the air outlet gas pressure of the battery compartment at the current time;
the leakage comparison unit is used for comparing the air outlet gas pressure of the battery compartment at the current time with the non-leakage model to obtain an air pressure difference value, comparing the air pressure difference value with the leakage reference model, judging whether the air pressure difference value is greater than an estimated air pressure difference value of the leakage reference model, judging that the battery compartment is in a leakage state if the air pressure difference value is greater than the estimated air pressure difference value, and judging that the battery compartment is in a non-leakage state if the air pressure difference value is less than the estimated air pressure difference value;
the calculation formula of the air outlet gas pressure of the battery compartment is as follows:
wherein the content of the first and second substances,
is the pressure of the air at the air inlet,
the area of the air inlet is the same as the area of the air inlet,
the temperature of the air inlet is used as the temperature of the air inlet,
the pressure of the air at the air outlet is,
the area of the air outlet is the same as the area of the air outlet,
is the air outlet temperature;
the non-leakage model in the non-leakage state of the battery compartment takes the fan speed and the air inlet temperature as variables and takes the air outlet gas pressure of the battery compartment in the non-leakage state of the battery compartment as a result;
the standard leakage model in the battery compartment leakage state takes the fan speed and the air inlet temperature as variables and takes the air outlet gas pressure of the battery compartment in the battery compartment leakage state as a result;
The leakage reference model takes the fan speed and the air inlet temperature as variables, and takes the estimated air pressure difference value as a result, and the estimated air pressure difference value is the difference value between the air outlet gas pressure of the battery compartment in the non-leakage state of the battery compartment and the air outlet gas pressure of the battery compartment in the leakage state of the battery compartment under the same variable.
Further, the wind speed of the fan includes a plurality of gears.
Furthermore, the new energy automobile safety protection system also comprises a water cooling system, wherein the water cooling system comprises water cooling plates positioned at the bottom and the side surface of the bin of the battery bin, a cavity is arranged inside the water cooling plates, the inlet of the water cooling plates is connected with the outlet of the water tank through a pipeline, the outlet of the water cooling plates is connected with the inlet of the water tank through a pipeline, and the water tank is connected with a radiator or a heater; the water cooling plates on the side walls of the bin of the battery bin are connected with the side walls of the bin through a plurality of elastic telescopic plate pieces, and the telescopic plate pieces can be compressed along the direction vertical to the side walls of the bin; the telescopic plate is connected with the first conduction plate attached to the surface of the water cooling plate, and the telescopic plate is connected with the second conduction plate attached to the side wall of the bin. The telescopic plate is in a fold line shape.
According to one aspect of the invention, the mounting device for the battery module of the new energy automobile safety protection system comprises a clamp and a shifting mechanism connected with the clamp, wherein the shifting mechanism comprises a front shifting mechanism, a rear shifting mechanism, a left shifting mechanism, a right shifting mechanism and an up-down shifting mechanism, the up-down shifting mechanism comprises an upper sliding seat and a lower sliding seat which are connected with the clamp, the upper sliding seat and the lower sliding seat are connected with a first beam through a longitudinal sliding rail, and a first linear driving mechanism used for driving the upper sliding seat and the lower sliding seat to move up and down is arranged on the first beam;
The left and right shifting mechanism comprises a left and right sliding seat fixedly connected with the first beam, the left and right sliding seat is connected with the second beam through a sliding rail horizontally arranged in the left and right direction, and the second beam is provided with a second linear driving mechanism connected with the left and right sliding seat;
the front and rear shifting mechanism comprises a front and rear sliding seat fixedly connected with the second beam, the front and rear sliding seat is connected with a third beam through a sliding rail horizontally arranged in the front and rear direction, and a third linear driving mechanism connected with the front and rear sliding seat is arranged on the third beam;
the clamp comprises a mounting seat and two thin clamping jaws arranged at the bottom of the mounting seat, the two thin clamping jaws are respectively a first thin clamping jaw and a second thin clamping jaw, two clamping fingers of the second thin clamping jaw are respectively connected with a telescopic clamping plate, the telescopic clamping plate comprises a fixed part fixedly connected with the clamping fingers of the second thin clamping jaw and a movable part connected with the fixed part, the top of the movable part is inserted into the fixed part, a hole in clearance fit with the movable part is formed in the fixed part, a spring is arranged in the hole of the fixed part, two ends of the spring are respectively connected with the fixed part and the movable part, and the lower end of the movable part is bent inwards to form a bent part; the first linear driving mechanism, the second linear driving mechanism and the third linear driving mechanism are lead screw linear driving mechanisms.
Before clamping the battery module, the two thin clamping jaws are opened, when the battery module is clamped, the clamp needs to descend to enable the clamping fingers of the thin clamping jaws to be located on two sides of the battery module, at the moment, the lower end of the telescopic clamping plate of the second thin clamping jaw is blocked by the platform where the battery module is located to overcome the elastic force of the spring to move upwards, the clamping fingers of the first thin clamping jaw move inwards to clamp the battery module, then the clamp rises, the lower end of the telescopic clamping plate is separated from the platform, the movable part of the telescopic clamping plate returns to the initial position due to the elastic force of the spring, and then the clamping fingers of the second thin clamping jaw move inwards to clamp the battery module; the shifting mechanism moves the clamp and the battery module to the position above the bin of the battery bin, then the shifting mechanism drives the clamp to move downwards, the part bent inwards at the lower end of the movable part in the process is firstly contacted with the water cooling plate on the side wall of the bin, along with the descending of the clamp, the two telescopic clamping plates prop the water cooling plate towards two sides until the clamp descends to the bottom of the movable part contacted with the bin, then the clamping fingers of the two thin clamping jaws are outwards opened, the second thin clamping jaw needs to be opened to the lower end of the movable part to be positioned on the side face of the battery module, then the shifting mechanism drives the clamp to ascend to separate from the battery module, and the installation of the battery module is completed.
The invention has the beneficial effects that:
the invention can accurately detect the leakage state of the battery compartment, so that the leakage of the battery compartment can be found in time, thereby avoiding the faults of a cooling system, avoiding the temperature of the battery compartment from being out of control and ensuring the safety of an automobile.
Drawings
Fig. 1 is a schematic view of the internal structure of a battery compartment according to an embodiment of the present invention;
FIG. 2 is a block schematic diagram of a battery temperature controller according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a bin of a battery compartment according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a retractable panel according to an embodiment of the present invention;
fig. 5 is a schematic structural view of an apparatus for mounting a battery module according to an embodiment of the present invention;
FIG. 6 is an overall schematic view of a displacement mechanism of an embodiment of the present invention;
FIG. 7 is a front view of a clamp of an embodiment of the present invention;
FIG. 8 is a top view of a clamp of an embodiment of the present invention;
fig. 9 is a sectional view of a telescopic splint according to an embodiment of the present invention.
In the figure: 100. a battery compartment; 200. a battery module; 101. a bin level; 102. an air inlet; 103. an air outlet; 104. a retractable plate; 105. a first conductive plate; 106. a second conductive plate; 107. a water-cooling plate; 301. a first temperature sensor; 302. a pressure sensor; 303. a second temperature sensor; 304. a battery temperature controller; 3041. a data acquisition unit; 3042. a model building unit; 3043. a current pressure calculation unit; 3044. a leakage comparison unit; 401. a clamp; 402. an upper and a lower slide seats; 403. a first beam; 404. a left and a right slide seats; 405. a second beam; 406. a front and rear slide; 407. a third beam; 408. a mounting seat; 409. a first thin jaw; 410. a second thin jaw; 411. a retractable splint; 412. a fixed part; 413. a movable portion; 414. a spring.
Detailed Description
The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thereby implement the subject matter described herein, and are not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as needed. In addition, features described with respect to some examples may also be combined in other examples.
As shown in fig. 1 and 2, a safety protection system for a new energy vehicle includes a battery compartment 100, a plurality of compartments 101 for accommodating battery modules 200 are disposed inside the battery compartment 100, an air inlet 102 and an air outlet 103 are correspondingly formed on two sides of the battery compartment 100, and a fan for forming air flow in the battery compartment 100 is disposed on the air inlet 102 and/or the air outlet 103;
a first temperature sensor 301 and a pressure sensor 302 are arranged at the air inlet 102, a second temperature sensor 303 is arranged at the air outlet 103, and the first temperature sensor 301, the pressure sensor 302 and the second temperature sensor 303 are connected with a battery temperature controller 304; the battery temperature controller 304 includes a data acquisition unit 3041, a model establishing unit 3042, a current pressure calculating unit 3043 and a leakage comparing unit 3044, wherein the data acquisition unit 3041 is configured to receive data acquired by the first temperature sensor 301, the pressure sensor 302 and the second temperature sensor 303, the model establishing unit 3042 is configured to establish a leakage-free model in a leakage-free state and a standard leakage model in a leakage-free state of the battery compartment 100, and obtain a leakage reference model through the leakage-free model and the standard leakage model;
The current pressure calculation unit 3043 is configured to calculate the gas pressure at the air outlet 103 of the battery compartment 100 at the current time;
the leakage comparing unit 3044 is configured to compare the gas pressure at the air outlet 103 of the battery compartment 100 at the current time with the non-leakage model to obtain a gas pressure difference value, compare the gas pressure difference value with the leakage reference model, determine whether the gas pressure difference value is greater than an estimated gas pressure difference value of the leakage reference model, determine that the battery compartment 100 is in a leakage state if the gas pressure difference value is greater than the estimated gas pressure difference value, and determine that the battery compartment 100 is in a non-leakage state if the gas pressure difference value is less than the estimated gas pressure difference value.
The explanation of the battery temperature controller 304 for calculating the gas pressure at the air outlet 103 of the battery compartment 100 and establishing the no-leakage model and the standard leakage model is as follows:
the well-known ideal gas state equation is as follows:
wherein p is gas pressure, V is gas volume, T is temperature, R is universal gas constant, M is gas mass, μ is gas molar mass;
assuming that the mass of the incoming cooling fluid is equal to the mass of the outgoing cooling fluid, equation 2 exists:
wherein the content of the first and second substances,
the pressure of the gas at the intake vent 102,
is the volume of gas at the intake vent 102,
is the inlet 102 temperature, R is the universal gas constant, μ is the molar mass of the gas, 
Is the pressure of the gas at the air outlet 103,
is the volume of gas at the air outlet 103,
is the outlet 103 temperature;
transformation of the equation according to equation 2 can result in equation 3:
wherein the content of the first and second substances,
the pressure of the gas at the intake vent 102,
is the volume of gas at the intake vent 102,
is an air inlet 102The temperature of the mixture is controlled by the temperature,
is the pressure of the gas at the air outlet 103,
is the volume of gas at the air outlet 103,
is the outlet 103 temperature;
because the areas of the air inlet 102 and the air outlet 103 of the battery compartment 100 are fixed, the volume of air at the air inlet 102 can be obtained by multiplying the area of the air inlet 102 by the flow of the inlet air, and the volume of air at the air outlet 103 can be obtained by multiplying the area of the air outlet 103 by the flow of the inlet air; also because the flow rate is equal to the flow velocity multiplied by the time, equation 3 can be transformed to equation 4 in the transient state where the time tends to be infinitesimal:
wherein the content of the first and second substances,
the pressure of the gas at the intake vent 102,
which is the area of the intake vent 102,
which is the temperature at the intake vent 102,
is the pressure of the gas at the air outlet 103,
which is the area of the air outlet 103,
is the outlet 103 temperature;
the gas pressure of the air outlet 103 can be calculated through the data collected by the first temperature sensor 301, the pressure sensor 302 and the second temperature sensor 303 through the formula;
a leakage-free model is obtained by modeling based on the battery compartment 100 in a leakage-free state, for example, the wind speed of the fan is controlled to be adjusted to the first gear (25%), the second gear (50%) and the third gear (75%), and the gas pressure of the air outlet 103 at different temperatures of the air inlet 102 is calculated by formula 4, as an example, the leakage-free model is as follows:
Modeling the battery compartment 100 in a leak state to obtain a standard leak model (the leak state refers to a state where a leak reaches a level that affects cooling of the battery compartment 100 and is an artificially created leak in order to obtain the standard leak model), as an example, the standard leak model is as follows:
a leakage reference model can be obtained by a standard leakage model and a no-leakage model, and is as follows:
the estimated pressure difference is the difference between the gas pressure of the leakage air outlet 103 in the standard leakage model and the gas pressure of the non-leakage air outlet 103 in the non-leakage model;
the above is merely an example, and the model may be expressed by a function or the like.
The above is only an example, the gear of the wind speed of the fan may be more than three gears, and the wind speed of the fan corresponding to the gear may also be determined according to the situation.
The present invention integrates temperature and pressure parameters to detect the leakage state of the battery compartment 100, and both the leakage on the air intake side and the leakage on the air exhaust side can be detected.
In an embodiment of the invention, the new energy automobile safety protection system further comprises a water cooling system, the water cooling system comprises water cooling plates 107 positioned at the bottom and the side of the bin 101 of the battery bin 100, a cavity is arranged inside the water cooling plates 107, an inlet of the water cooling plates 107 is connected with an outlet of a water tank through a pipeline, an outlet of the water cooling plates 107 is connected with an inlet of the water tank through a pipeline, and the water tank is connected with a radiator or a heater; the water in the water tank is cooled through the radiator, the battery compartment 100 can be cooled through water circulation, the water in the water tank is heated through the heater, and the battery compartment 100 can be heated through the water circulation;
In a general water cooling system of the battery compartment 100, the water cooling plate 107 is only arranged at the bottom of the compartment 101 of the battery compartment 100, only the bottom surface of the battery module 200 contacts with the water cooling plate 107, a gap exists between the battery module 200 and the side wall of the compartment 101 of the battery compartment 100, and due to the existence of the gap, the heat conduction between the side surface of the battery module 200 and the compartment 101 of the battery compartment 100 is negligible, and in general, the effective heat exchange area of the battery module 200 is limited.
In the embodiment of the invention, the effective heat exchange area of the battery module 200 is increased by several times by arranging the water cooling plate 107 on the side surface of the bin 101, but the problem is that the installation of the battery module 200 is hindered by the water cooling plate 107 because the water cooling plate 107 needs to be in contact with the side surface of the battery module 200, and in order to solve the problem, the invention provides a connection structure of the water cooling plate 107 and the battery bin 100, as shown in fig. 3 and 4, the water cooling plate 107 on the side wall of the bin 101 of the battery bin 100 is connected with the side wall of the bin 101 through a plurality of elastic telescopic plates 104, the telescopic plates 104 can be compressed along the direction vertical to the side wall of the bin 101, the telescopic plates 104 are connected with the first conducting plate 105 attached to the surface of the water cooling plate 107, and the telescopic plates 104 are connected with the second conducting plate 106 attached to the side wall of the bin 101;
The retractable plate 104 may be in a zigzag shape or a wave shape; the material of the telescopic plate 104 may be spring steel. The expansion plate 104 can transfer heat between the water-cooling plate 107 and the storage space 101 of the battery compartment 100, so that the water-cooling plate 107 on the side of the storage space 101 can participate in the overall heat dissipation process of the battery compartment 100.
After the battery module 200 is placed in the bin 101 of the battery bin 100, the telescopic plate 104 is compressed, and the elastic force generated by the telescopic plate enables the water cooling plate 107 on the side wall of the bin 101 to be attached to the surface of the battery module 200, so that the effective heat exchange area of the battery module 200 is increased, and the problem that the water cooling plate 107 obstructs the installation of the battery module 200 is solved;
further, in order to complete the assembly of the battery module 200 and the bin 101 of the battery compartment 100, as shown in fig. 5-9, the present invention further provides a device for mounting the battery module 200, which includes a fixture 401 and a shifting mechanism connected to the fixture 401, wherein the shifting mechanism includes a front-back shifting mechanism, a left-right shifting mechanism and a top-bottom shifting mechanism, the top-bottom shifting mechanism includes a top-bottom sliding seat 402 connected to the fixture 401, the top-bottom sliding seat 402 is connected to a first beam 403 through a longitudinally arranged sliding rail, and a first linear driving mechanism for driving the top-bottom sliding seat 402 to move up and down is disposed on the first beam 403;
The first linear driving mechanism may adopt an air cylinder, a hydraulic cylinder or a lead screw linear driving mechanism, and as an example of the first linear driving mechanism, the first linear driving mechanism includes a first lead screw pair connected to the first beam 403 through a bearing, one end of a lead screw of the first lead screw pair is connected to an output end of a first motor, and a nut of the first lead screw pair is fixedly connected to the upper and lower sliding seats 402;
the left-right shifting mechanism comprises a left-right sliding seat 404 fixedly connected with the first beam 403, the left-right sliding seat 404 is connected with a second beam 405 through a sliding rail horizontally arranged in the left-right direction, and a second linear driving mechanism connected with the left-right sliding seat 404 is arranged on the second beam 405;
the second linear driving mechanism may adopt an air cylinder, a hydraulic cylinder or a lead screw linear driving mechanism, and as an example of the second linear driving mechanism, the second linear driving mechanism includes a second lead screw pair connected to the second beam 405 through a bearing, one end of a lead screw of the second lead screw pair is connected to an output end of a second motor, and a nut of the second lead screw pair is fixedly connected to the left and right sliding seats 404;
the front-rear displacement mechanism comprises a front-rear sliding seat 406 fixedly connected with a second beam 405, the front-rear sliding seat 406 is connected with a third beam 407 through a sliding rail horizontally arranged in the front-rear direction, and a third linear driving mechanism connected with the front-rear sliding seat 406 is arranged on the third beam 407;
The third linear driving mechanism may adopt an air cylinder, a hydraulic cylinder or a lead screw linear driving mechanism, and as an example of the third linear driving mechanism, the third linear driving mechanism includes a third lead screw pair connected to the third beam 407 through a bearing, one end of a lead screw of the third lead screw pair is connected to an output end of a third motor, and a nut of the third lead screw pair is fixedly connected to the front and rear sliding seats 406;
in the embodiment of the present invention, two third beams 407 are provided, and two ends of the second beam 405 are respectively connected to a front and rear slide 406, so as to improve the stability of the movement of the second beam 405.
The clamp 401 comprises an installation seat 408 and two thin type clamping jaws arranged at the bottom of the installation seat 408, the two thin type clamping jaws are respectively a first thin type clamping jaw 409 and a second thin type clamping jaw 410, wherein two clamping fingers of the second thin type clamping jaw 410 are respectively connected with a telescopic clamping plate 411, the telescopic clamping plate 411 comprises a fixing part 412 fixedly connected with the clamping fingers of the second thin type clamping jaw 410 and a movable part 413 connected with the fixing part 412, the top of the movable part 413 is inserted into the fixing part 412, a hole in clearance fit with the movable part 413 is formed in the fixing part 412, a spring 414 is arranged in the hole of the fixing part 412, two ends of the spring 414 are respectively connected with the fixing part 412 and the movable part 413, and the lower end of the movable part 413 is bent inwards to form a bent part.
Before clamping the battery module 200, the two thin type clamping jaws are opened, when clamping the battery module 200, the clamp 401 needs to descend to enable the clamping fingers of the thin type clamping jaws to be positioned at two sides of the battery module 200, at the moment, the lower end of the telescopic clamping plate 411 of the second thin type clamping jaw 410 is blocked by the platform where the battery module 200 is positioned to overcome the elastic force of the spring 414 to move upwards, the clamping fingers of the first thin type clamping jaw 409 move inwards to clamp the battery module 200, then the clamp 401 ascends, the lower end of the telescopic clamping plate 411 is separated from the platform, the movable part 413 of the telescopic clamping plate 411 returns to the initial position (the lower end of the movable part 413 is positioned below the battery module 200 at the initial position) due to the elastic force of the spring 414, and then the clamping fingers of the second thin type clamping jaw 410 move inwards to clamp the battery module 200; the shifting mechanism moves the clamp 401 and the battery module 200 to the position above the bin 101 of the battery bin 100, then the shifting mechanism drives the clamp 401 to move downwards, in the process, the inward bent part at the lower end of the movable part 413 firstly contacts the water cooling plate 107 on the side wall of the bin 101, along with the descending of the clamp 401, the two telescopic clamping plates 411 support the water cooling plate 107 towards two sides until the clamp 401 descends to the position where the movable part 413 contacts the bottom of the bin 101, then the clamping fingers of the two thin clamping jaws are opened outwards, the second thin clamping jaw 410 needs to be opened until the lower end of the movable part 413 is located on the side face of the battery module 200, then the shifting mechanism drives the clamp 401 to ascend to separate from the battery module 200, and the installation of the battery module 200 is completed.
The embodiments of the present invention have been described with reference to the drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention and the protection scope of the claims.
Claims (10)
1. The safety protection system of the new energy automobile is characterized by comprising a battery compartment, wherein a plurality of compartment positions for containing battery modules are arranged in the battery compartment, an air inlet and an air outlet are correspondingly formed in two sides of the battery compartment, and a fan for forming air flow in the battery compartment is arranged on the air inlet and/or the air outlet;
a first temperature sensor and a pressure sensor are arranged at the air inlet, a second temperature sensor is arranged at the air outlet, and the first temperature sensor, the pressure sensor and the second temperature sensor are connected with a battery temperature controller; the battery temperature controller comprises a data acquisition unit, a model establishment unit, a current pressure calculation unit and a leakage comparison unit, wherein the data acquisition unit is used for receiving data acquired by a first temperature sensor, a pressure sensor and a second temperature sensor, the model establishment unit is used for establishing a leakage-free model in a leakage-free state and a standard leakage model in a leakage state of the battery compartment, and a leakage reference model is obtained through the leakage-free model and the standard leakage model;
The current pressure calculating unit is used for calculating the air outlet gas pressure of the battery compartment at the current time;
the leakage comparison unit is used for comparing the air outlet gas pressure of the battery compartment at the current time with the non-leakage model to obtain an air pressure difference value, comparing the air pressure difference value with the leakage reference model, judging whether the air pressure difference value is greater than an estimated air pressure difference value of the leakage reference model, judging that the battery compartment is in a leakage state if the air pressure difference value is greater than the estimated air pressure difference value, and judging that the battery compartment is in a non-leakage state if the air pressure difference value is less than the estimated air pressure difference value;
the calculation formula of the air outlet gas pressure of the battery compartment is as follows:
wherein the content of the first and second substances,
is the pressure of the air at the air inlet,
the area of the air inlet is the same as the area of the air inlet,
the temperature of the air inlet is used as the temperature of the air inlet,
the pressure of the air at the air outlet is,
the area of the air outlet is the same as the area of the air outlet,
is the air outlet temperature;
the non-leakage model in the non-leakage state of the battery compartment takes the fan speed and the air inlet temperature as variables and takes the air outlet gas pressure of the battery compartment in the non-leakage state of the battery compartment as a result;
the standard leakage model in the battery compartment leakage state takes the fan speed and the air inlet temperature as variables and takes the air outlet gas pressure of the battery compartment in the battery compartment leakage state as a result;
The leakage reference model takes the fan speed and the air inlet temperature as variables, and takes the estimated air pressure difference value as a result, and the estimated air pressure difference value is the difference value between the air outlet gas pressure of the battery compartment in the non-leakage state of the battery compartment and the air outlet gas pressure of the battery compartment in the leakage state of the battery compartment under the same variable.
2. The safety protection system of the new energy automobile, according to claim 1, characterized in that the wind speed of the fan comprises a plurality of gears.
3. The new energy automobile safety protection system according to claim 1, characterized in that the new energy automobile safety protection system further comprises a water cooling system, the water cooling system comprises water cooling plates located at the bottom and the side of the bin of the battery bin, a cavity is formed inside the water cooling plates, an inlet of the water cooling plates is connected with an outlet of the water tank through a pipeline, an outlet of the water cooling plates is connected with an inlet of the water tank through a pipeline, and the water tank is connected with a radiator or a heater.
4. The new energy automobile safety protection system according to claim 1, wherein the water cooling plates on the side walls of the bin of the battery bin are connected with the side walls of the bin through a plurality of elastic telescopic plates, and the telescopic plates can be compressed in a direction perpendicular to the side walls of the bin.
5. The new energy automobile safety protection system according to claim 4, wherein the telescopic plate is connected with a first conduction plate attached to the surface of the water cooling plate, and the telescopic plate is connected with a second conduction plate attached to the side wall of the bin.
6. The new energy automobile safety protection system according to claim 4, wherein the expansion plate is in a zigzag shape.
7. The new energy automobile safety protection system according to claim 4, wherein the mounting device of the battery module comprises a clamp and a shifting mechanism connected with the clamp, the shifting mechanism comprises a front shifting mechanism, a rear shifting mechanism, a left shifting mechanism, a right shifting mechanism and an up-down shifting mechanism, the up-down shifting mechanism comprises an upper sliding seat and a lower sliding seat connected with the clamp, the upper sliding seat and the lower sliding seat are connected with a first beam through a longitudinal sliding rail, and a first linear driving mechanism for driving the upper sliding seat and the lower sliding seat to move up and down is arranged on the first beam;
the left and right shifting mechanism comprises a left and right sliding seat fixedly connected with the first beam, the left and right sliding seat is connected with the second beam through a sliding rail horizontally arranged in the left and right direction, and the second beam is provided with a second linear driving mechanism connected with the left and right sliding seat;
the front and rear shifting mechanism comprises a front and rear sliding seat fixedly connected with the second beam, the front and rear sliding seat is connected with a third beam through a sliding rail horizontally arranged in the front and rear direction, and a third linear driving mechanism connected with the front and rear sliding seat is arranged on the third beam;
The clamp comprises a mounting seat and two thin clamping jaws arranged at the bottom of the mounting seat, the two thin clamping jaws are respectively a first thin clamping jaw and a second thin clamping jaw, two clamping fingers of the second thin clamping jaw are respectively connected with a telescopic clamping plate, the telescopic clamping plate comprises a fixing part fixedly connected with the clamping fingers of the second thin clamping jaw and a movable part connected with the fixing part, the top of the movable part is inserted into the fixing part, a hole in clearance fit with the movable part is formed inside the fixing part, a spring is arranged in the hole of the fixing part, the two ends of the spring are respectively connected with the fixing part and the movable part, and the lower end of the movable part is bent inwards to form a bending part.
8. The new energy automobile safety protection system according to claim 7, wherein the first linear driving mechanism comprises a first lead screw pair connected with the first beam through a bearing, one end of a lead screw of the first lead screw pair is connected with the output end of the first motor, and a nut of the first lead screw pair is fixedly connected with the upper sliding seat and the lower sliding seat.
9. The new energy automobile safety protection system according to claim 7, wherein the second linear driving mechanism comprises a second lead screw pair connected with the second beam through a bearing, one end of a lead screw of the second lead screw pair is connected with the output end of the second motor, and a nut of the second lead screw pair is fixedly connected with the left sliding seat and the right sliding seat.
10. The new energy automobile safety protection system according to claim 7, wherein the third linear driving mechanism comprises a third screw pair connected with the third beam through a bearing, one end of a screw of the third screw pair is connected with an output end of a third motor, and a nut of the third screw pair is fixedly connected with the front sliding seat and the rear sliding seat.
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