CN110828937A - Temperature control system and method for power storage battery device - Google Patents
Temperature control system and method for power storage battery device Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a temperature control device for a power storage battery device, which comprises a plurality of water-cooling base plates, wherein the water-cooling base plates allow cooling water to circulate inside the water-cooling base plates; a heat exchanger; a water circulating pump; a heating device; a plurality of temperature sensors; the plurality of water-cooling base plates are connected in parallel and then connected in series with the heat exchanger, the circulating water pump and the heating device to form a cooling water circulation loop, the heat exchanger is respectively connected with the cooling water circulation loop and the refrigeration circulation mechanism, and the refrigeration circulation mechanism and the heating device are selectively opened or closed according to the temperature detected by the temperature sensor. The power storage battery device has reasonable structure and high heat conduction efficiency, and can effectively save energy. The invention also provides a power storage battery device comprising the temperature control device and a corresponding temperature control method.
Description
Technical Field
The invention relates to the technical field of storage batteries, in particular to a temperature control system and method for a power storage battery device.
Background
In recent years, with frequent accidents of fire, combustion and explosion of power batteries of electric automobiles, people pay attention to the thermal safety design of the power batteries, various thermal safety problems of the power batteries are summarized and analyzed, and the close correlation between the performance, the service life and the safety of the batteries and the temperature of the batteries can be easily found. Specifically, the power battery has the defects that the temperature is too high, particularly under the working condition of high-rate charge and discharge, liquid leakage, air release, smoke generation and the like can occur, the battery can be violently combusted or even exploded when serious, and the service life of the battery is reduced by half when the temperature of the battery rises by 15 ℃ according to statistics; the battery temperature is too low, the power and the capacity of the battery can be obviously reduced, and if the power is not limited, lithium ions can be separated out to cause irreversible attenuation and hidden safety hazards. In addition, under the influence of spatial layout and thermal guarantee modes among the battery modules, thermal environments around different battery cores and modules are often very uneven, namely, the temperature gradient is large, when the single batteries are used in parallel, thermoelectric coupling can be caused, namely, the internal resistance of the battery with high temperature is small, more current can be shared, so that the charge state is uneven, overcharge or overdischarge of part of the battery cores is easily caused, the deterioration of the battery modules is accelerated, and the service life is shortened.
The power storage battery device suitable for large-scale electric vehicles in the fields of railway transportation and the like has the characteristics of large volume, large number of storage battery units and the like, so that the temperature control is more difficult. FIG. 1 shows one example of a power storage battery apparatus 100. The power storage battery device 100 generally includes a controller 110, a housing 120, and a plurality of battery packs 130 arranged in order on both sides in the housing 120, wherein a plurality of battery cells are connected in series or in parallel as a battery pack to constitute a single battery pack 130. In this embodiment, each side of the power storage battery device 100 is arranged with 84 battery packs 130, 6 × 14. The housing 120 includes a cover plate 121 covering the battery pack 130, and the housing 120 forms a sealed space by the sealing effect of the cover plate 121, so as to meet the requirements of dust and water prevention for the battery unit. The air conditioner 140, which is usually installed outside the power storage battery device 100, controls the temperature of the power storage battery device 110. For example, in the example shown in fig. 2, the shutters 11 on both sides of the locomotive compartment 10 are opened, the air conditioner 140 operates to discharge cool air, the cool air flows along the outer contour of the power storage battery device and the inner space of the locomotive compartment 10 (see the direction of the arrow), and the warm air is discharged from the shutters 11 on both sides of the locomotive compartment 10, thereby achieving cooling of the power storage battery device 100; in the example shown in fig. 3, the louvers 11 on both sides of the locomotive compartment 10 are closed, the air conditioner 140 operates to discharge hot air, and the hot air forms a circulation flow field (see the direction of arrows) in the outer contour of the power storage battery device 100 and the inner space of the locomotive compartment 10, thereby achieving heating of the power storage battery device 100.
However, the prior art solution has the following disadvantages:
1. the high-power air conditioner is used for adjusting the temperature at the periphery of the power storage battery 100, so that the working time is long, a large amount of electric energy is consumed, and the energy conservation and emission reduction are not facilitated;
2. since the power storage battery device 100 is a closed space, heat can be conducted only to a limited extent through the iron plates constituting the case 120, the internal storage battery cells cannot be cooled or heated quickly and efficiently, temperature control efficiency is low,
3. because the heat of the battery pack 130 cannot be completely led out and the air flow field outside the power storage battery device 100 is uneven, the temperature of the storage battery which is closer to the inner side of the lower end is higher, the temperature difference of the storage battery inside the power storage battery device 100 is larger, so that the consistency of the storage battery unit is poor, and the normal work is influenced;
4. the storage battery unit works at an excessively high or low temperature for a long time, so that not only are dangerous accidents such as combustion or explosion easily occur, but also the service life of the storage battery unit is seriously shortened.
Therefore, a temperature control system and a temperature control method for a power storage battery device, which are reasonable in structure, high in heat conduction efficiency and energy-saving, are urgently needed to be designed.
Disclosure of Invention
In order to solve the technical problem, the invention provides a temperature control system and method for a power storage battery device based on a water-cooling substrate.
According to the invention, the temperature control system for the power storage battery device comprises:
a plurality of water-cooled substrates allowing cooling water to flow therein;
a heat exchanger;
a water circulating pump;
a heating device;
a plurality of temperature sensors;
the plurality of water-cooling base plates are connected in parallel and then connected in series with the heat exchanger, the circulating water pump and the heating device to form a cooling water circulation loop, the heat exchanger is respectively connected with the cooling water circulation loop and the refrigeration circulation mechanism, and the refrigeration circulation mechanism and the heating device are selectively opened or closed according to the temperature detected by the temperature sensor.
In one embodiment of the invention, the water-cooling substrate comprises a shell, a water inlet and a water outlet which are arranged on the shell, and a cooling water path, wherein the cooling water path is connected with the water inlet and the water outlet and is uniformly arranged in the shell to form a cooling water channel.
In one embodiment of the invention, the water-cooled base plate comprises a housing, a water inlet and a water outlet disposed on the housing, and a wall extending vertically from a bottom of the housing to a top of the housing, wherein the wall and a side wall of the housing together define a cooling water channel.
In one embodiment of the present invention, the refrigeration cycle mechanism includes a compressor, a condenser, a liquid storage tank, and an expansion valve, wherein the compressor, the condenser, and the liquid storage tank are connected in series in this order to form a refrigeration cycle circuit, and the expansion valve is configured to control a flow rate of the refrigerant.
In an embodiment of the present invention, the temperature control system further includes a water tank disposed at the highest point of the cooling water circulation loop and connected to the cooling water circulation loop through a water replenishing pipe and an exhaust pipe.
According to the power storage battery device, the power storage battery device comprises the temperature control system and a plurality of battery packs, wherein the water-cooling base plate is configured to be tightly attached to the battery packs, and each battery pack is configured with at least one temperature sensor.
In one embodiment of the invention, the outside of the water-cooled substrate is coated with heat-conducting glue, and the battery pack is directly attached to the heat-conducting glue.
According to the temperature control method for the power storage battery device, the maximum value of the temperatures detected by the plurality of temperature sensors is selected as the temperature of the power storage battery device, wherein,
the heating process of the power storage battery device comprises the following steps:
turning on a heating device in response to the power battery device temperature being below a first temperature threshold;
turning off the heating device in response to the power storage battery device temperature not being below a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold;
the cooling process of the power storage battery device comprises the following steps:
turning on a refrigeration cycle mechanism in response to the power storage battery device temperature being greater than a third temperature threshold;
shutting down the refrigeration cycle mechanism in response to the power storage battery device temperature not being greater than a fourth temperature threshold, wherein the third temperature threshold is greater than the fourth temperature threshold.
In one embodiment of the invention, an alarm is issued in response to a maximum temperature difference of the temperatures detected by the plurality of temperature sensors being greater than 5 ℃.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the invention ensures the temperature difference between the storage batteries to be within 3 ℃ through the continuous circulation of the cooling water under the action of the circulating water pump, ensures the consistency of the storage batteries and prolongs the service life of the storage batteries.
2. The invention effectively controls the temperature of the storage battery between 15 ℃ and 35 ℃ through reasonable heat dissipation and heating modes, so that the storage battery works under the optimal condition, and the service life of the storage battery is prolonged.
3. The invention effectively leads out the heat in the battery and heats the battery through the water-cooling substrate, thereby reducing the waste of auxiliary electric energy and indirectly prolonging the service life of the storage battery.
Drawings
FIG. 1 illustrates a schematic diagram of one embodiment of a prior art power accumulator apparatus;
FIG. 2 is a schematic diagram illustrating a cooling process of the power storage battery apparatus of FIG. 1;
FIG. 3 is a schematic diagram illustrating a heating process of the power storage battery apparatus of FIG. 1;
FIG. 4 illustrates a schematic diagram of an embodiment of a temperature control system of a power storage battery apparatus in accordance with the present invention;
FIG. 5 is a schematic diagram of an embodiment of a water-cooled substrate according to the present invention;
FIG. 6 is a schematic view of another embodiment of a water-cooled base plate according to the present invention;
FIG. 7 is a block diagram illustrating a heating process of a power cell device temperature control method according to the present invention;
fig. 8 is a block diagram illustrating a cooling process of the temperature control method of the power battery device according to the present invention.
In the figure:
10 locomotive carriage, 11 shutter, 100 power accumulator unit, 110 controller, 120 casing, 121 cover plate, 130 battery pack, 140 air conditioner, 240 temperature control system, 241 ' water-cooling base plate, 2411 ' shell, 2412 ' water inlet, 2413 ' water outlet, 2414 cooling water circuit, 2414 ' wall, 242 heat exchanger, 243 refrigeration cycle mechanism, 2431 compressor, 2432 condenser, 2433 liquid storage tank, 2434 expansion valve, 244 circulating water pump, 245 heating device, 246 temperature sensor, 247 water tank, 2471 water replenishing pipe and 2472 exhaust pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 4 illustrates one embodiment of a power battery apparatus temperature control system according to the present invention. The temperature control system 240 generally includes a plurality of water-cooled base plates 241, a heat exchanger 242, a refrigeration cycle mechanism 243 connected to the heat exchanger 242 to supply a refrigerant, a water circulation pump 244, and a heating device 245. Specifically, the water-cooled base plate 241 allows cooling water to circulate inside thereof. The plurality of water-cooled base plates 241 are connected in parallel to each other through a pipe, such as a hose, and then connected in series to the heat exchanger 242, the circulating water pump 244, and the heating device 245 to form a cooling water circulation circuit. In the cooling water circulation circuit, a water-cooled base plate 241 is provided to closely adhere to each of the battery packs 130 of the power storage battery device 100 so as to take away heat of the battery packs 130 by heat conduction or transfer the heat to the battery packs 130. Preferably, a heat conductive adhesive may be applied on the outside of the water-cooled substrate 241 and directly attached to the battery pack 130 through the heat conductive adhesive, for example, directly attached to the bottom of the battery pack 130 to support the battery pack 130. When the cooling circulation mechanism 243 is turned on, the high-temperature cooling water flowing out of the water-cooling base plate 241 exchanges heat with the refrigerant in the heat exchanger 242 to obtain low-temperature cooling water; when the heating device 245 is turned on, the low-temperature cooling water is heated to be high-temperature cooling water by the heating device 245 and flows into the water-cooling substrate 241; the circulating water pump provides power for the flow of cooling water to promote the circulation of the cooling water. The temperature control system 240 further comprises a plurality of temperature sensors 246, and each battery pack 130 can be configured with at least one temperature sensor 246 to detect the temperature of the battery pack 130, so as to provide a basis for the refrigeration cycle mechanism 243 and the heating device 245 to be turned on and off. For example, in the power storage battery device 100 shown in fig. 1, 5 temperature sensors may be arranged for each of the 168 battery packs 130, and 840 temperature sensors are required for the entire power storage battery device 100.
The water-cooled substrate 241 may have various forms. In one embodiment of the invention, as shown in fig. 5, the water-cooled substrate 241 may include a housing 2411, a water inlet 2412 and a water outlet 2413 provided on the housing 2411, and a cooling water channel 2414. Wherein, the shell can be made of materials with good thermal conductivity, such as metal; the cooling water passage 2414 connects the water inlet 2412 and the water outlet 2413 and is uniformly arranged in the housing 2411 to form a cooling water passage. For example, cooling water channels 2414 may be arranged in an S-shaped serpentine arrangement end-to-end, or uniformly in other shapes. In another embodiment of the present invention, as shown in fig. 6, the water-cooled substrate 241 ' may include a housing 2411 ', a water inlet 2412 ' and a water outlet 2413 ' provided on the housing 2411 ', and a wall 2414 ' vertically extending from the bottom to the top of the housing 2411 '. The walls 2414 ' may also be arranged in the housing 2411 ' in an S-shaped serpentine configuration, such that the side walls of the housing 2411 ' together define a cooling water channel for circulating cooling water in the direction of the arrows. Preferably, the bottom and side walls of the housing 2411 ' and the wall 2414 ' inside thereof may be a one-piece member machined from a metal plate or the like, and the top of the housing 2411 ' may be machined to detachably mount a cover (not shown) over the one-piece member. Alternatively, the water-cooled substrate 241 may have various other structures that allow cooling water to flow therein.
In an embodiment of the present invention, the refrigeration cycle mechanism 243 is based on an air conditioning refrigeration mechanism and may include a compressor 2431, a condenser 2432, a reservoir 2433, and an expansion valve 2434. Wherein the compressor 2431, the condenser 2432 and the liquid storage tank 2433 are connected in series in sequence to form a refrigeration cycle loop. The expansion valve 2434 is provided to control the flow rate of the refrigerant, for example, to throttle and decompress the refrigerant in the refrigeration cycle mechanism 243 at an appropriate timing, thereby preventing the liquid hammer phenomenon from occurring in the compressor 2431. Alternatively, the refrigeration cycle mechanism 243 may have another suitable structure to provide heat exchange between the refrigerant and the high-temperature cooling water. The heating device 245 may be in any form capable of heating the cooling water, such as a PTC resistor (thermistor) or the like.
The temperature control system 240 further comprises a water tank 247 connected to the cooling water circulation loop via a water replenishing pipe 2471, so as to replenish the cooling water in time by the circulating water pump 244. Preferably, the specific location of the water tank 247 may be disposed at the highest point of the cooling water circulation circuit and communicated into the cooling water circulation circuit through the exhaust pipe 2472 to facilitate the exhaust of the gas in the cooling water circulation circuit.
The method of controlling the temperature of the power battery device 100 based on the temperature control system 240 of the present invention may generally include a heating process and a cooling process. Among them, the maximum value of the temperatures detected by the plurality of temperature sensors 246 is selected as the power storage battery device temperature, and the heating device 245 and the refrigeration cycle mechanism 243 are turned on or off based on the storage battery device temperature.
The heating process of the power storage battery device 100 includes: turning on a heating device in response to the power battery device temperature being below a first temperature threshold; the heating device 245 is turned off in response to the power battery device temperature not being below a second temperature threshold, the second temperature threshold being greater than the first temperature threshold. In the embodiment of the heating process shown in fig. 7, a PTC resistor is used as the heating device 245, the first temperature threshold and the second temperature threshold are set to 15 ℃ and 20 ℃, respectively, and the worker may also set the appropriate first temperature threshold and second temperature threshold according to the actual working condition. . Specifically, after the power storage battery device 100 is started, when the temperature sensor 246 detects that the temperature of the power storage battery device is lower than 15 ℃, the PTC resistor is started to heat the cooling water, the cooling water transfers heat to the water-cooling substrate 241 through the circulation loop under the action of the circulating water pump 244, and the heat of the water-cooling substrate 241 is transferred to the battery pack 130 through the heat-conducting glue to heat the storage battery unit. When temperature sensor 246 detects a power battery device temperature equal to or greater than 20 ℃, the PTC resistor stops operating. Since the power storage battery device 100 generates heat continuously during operation, the PTC resistor does not operate frequently, but operates after being restarted only when the power storage battery device is not operated for a long time and the ambient temperature is low.
The cooling process of the power storage battery device 100 includes: turning on a refrigeration cycle mechanism in response to the power storage battery device temperature being greater than a third temperature threshold; the refrigeration cycle mechanism is shut down in response to the power storage battery device temperature not being greater than a fourth temperature threshold, the third temperature threshold being greater than the fourth temperature threshold. In the embodiment of the heating process shown in fig. 8, the third temperature threshold is set to 35 ℃, the fourth temperature threshold is set to 20 ℃, and the staff member can also set the appropriate third temperature threshold and fourth temperature threshold according to the actual working conditions. Specifically, when the temperature sensor 246 detects that the temperature of the power storage battery device is higher than 35 ℃, a power switch for controlling the power on of the refrigeration circulation loop is started to enable the refrigeration circulation loop to start to work, and R134a medium is added to the refrigeration circulation loop to serve as refrigerant. The refrigerant is cooled by the phase change principle by the components such as the compressor 2431 and the condenser 2432, and the cooled refrigerant is sent to the heat exchanger 242. Meanwhile, the battery pack 130 transfers heat to the water-cooling base plate 241 through the heat conductive glue, the water-cooling base plate 241 transfers heat to the cooling water, and the heated cooling water is transported to the heat exchanger 242 through the circulation loop under the action of the circulation water pump 244. The cooling water and the refrigerant exchange heat in the heat exchanger, and the battery is cooled by continuous operation. When the temperature sensor 246 detects that the temperature of the power accumulator unit is less than or equal to 20 ℃, a power switch for controlling the power-on of the refrigeration circulation loop is closed to stop the refrigeration circulation loop.
Because the water-cooling base plates 241 are uniformly arranged in the power storage battery device 100 and are close to the battery pack 130, the temperature balance of all positions in the power storage battery device 100 is favorably kept. The temperatures detected by each of the plurality of temperature sensors 246 are not normally very different, and a large temperature difference occurs in a specific case, such as a malfunction of a battery cell, etc. Preferably, it may be arranged to issue an alarm when the maximum temperature difference of the temperatures detected by the plurality of sensors 246 is greater than a certain value, for example 5 ℃.
The invention effectively controls the temperature in the power storage battery device 100 in a proper temperature range through reasonable heating and cooling modes, and the temperature of each storage battery unit is balanced, so that the storage battery units can work under the optimal condition, thereby not only improving the working efficiency, but also effectively prolonging the service life of the storage battery units.
The above examples only express embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A temperature control system for a power storage battery apparatus, the temperature control system comprising:
a plurality of water-cooled substrates that allow cooling water to flow therein;
a heat exchanger;
a water circulating pump;
a heating device;
a plurality of temperature sensors;
the plurality of water-cooling base plates are connected in parallel and then connected in series with the circulating water pump and the heating device to form a cooling water circulation loop, the heat exchanger is connected with the cooling water circulation loop and the refrigeration circulation mechanism respectively, and the refrigeration circulation mechanism and the heating device are selectively opened or closed according to the temperature detected by the temperature sensor.
2. The temperature control system according to claim 1, wherein the water-cooled substrate comprises a housing, a water inlet and a water outlet disposed on the housing, and a cooling water path, wherein the cooling water path is connected to the water inlet and the water outlet and is uniformly disposed in the housing to form a cooling water channel.
3. The temperature control system of claim 1, wherein the water-cooled base plate comprises a housing, a water inlet and a water outlet disposed on the housing, and a wall extending vertically from a bottom of the housing to a top of the housing, wherein the wall and a sidewall of the housing together define a cooling water channel.
4. The temperature control system according to claim 1, wherein the refrigeration cycle mechanism comprises a compressor, a condenser, a liquid storage tank, and an expansion valve, wherein the compressor, the condenser and the liquid storage tank are sequentially connected in series to form a refrigeration cycle loop, and the expansion valve is configured to control a flow rate of the refrigerant.
5. The temperature control system of claim 1, further comprising a water tank disposed at a highest point of the cooling water circulation loop and connected to the cooling water circulation loop through a water replenishing pipe and an exhaust pipe.
6. A power storage battery device, comprising the temperature control system of any one of claims 1-5 and a plurality of battery packs, wherein a water-cooled base plate is configured to be in close fit with the battery packs, and each battery pack is configured with at least one temperature sensor.
7. The power storage battery device according to claim 6, wherein a heat conducting glue is coated outside the water-cooled base plate, and the battery pack is directly attached to the heat conducting glue.
8. A temperature control method for a power storage battery device according to claim 6, wherein a maximum value of temperatures detected by a plurality of temperature sensors is selected as the power storage battery device temperature, wherein,
the heating process of the power storage battery device comprises the following steps:
activating a heating device in response to the power battery device temperature being below a first temperature threshold;
turning off the heating device in response to the power storage battery device temperature not being below a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold; the cooling process of the power storage battery device comprises the following steps:
activating a refrigeration cycle mechanism in response to the power storage battery device temperature being greater than a third temperature threshold;
shutting down the refrigeration cycle mechanism in response to the power storage battery device temperature not being greater than a fourth temperature threshold, wherein the third temperature threshold is greater than the fourth temperature threshold.
9. The temperature control method of claim 8, wherein an alarm is issued in response to a maximum temperature difference of the temperatures detected by the plurality of temperature sensors being greater than 5 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111959280A (en) * | 2020-08-31 | 2020-11-20 | 中车大连机车车辆有限公司 | Power battery safety protection system and safety protection method |
| CN113437402A (en) * | 2021-06-02 | 2021-09-24 | 广州小鹏汽车科技有限公司 | Battery module, battery module assembly and heat exchange device |
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Effective date of registration: 20211022 Address after: 116022 No. 51, central The Strip, Shahekou District, Liaoning, Dalian Applicant after: CRRC DALIAN Co.,Ltd. Applicant after: China National Railway Group Co.,Ltd. Address before: 116022 No. 51, central The Strip, Shahekou District, Liaoning, Dalian Applicant before: CRRC DALIAN Co.,Ltd. |
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