CN112133982A - Temperature-controllable battery module and temperature control method thereof - Google Patents
Temperature-controllable battery module and temperature control method thereof Download PDFInfo
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- CN112133982A CN112133982A CN202011018447.3A CN202011018447A CN112133982A CN 112133982 A CN112133982 A CN 112133982A CN 202011018447 A CN202011018447 A CN 202011018447A CN 112133982 A CN112133982 A CN 112133982A
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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
- H01M10/62—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
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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
- H01M10/635—Control systems based on ambient 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
- H01M10/63—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
- H01M10/65—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
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the 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
- H01M10/656—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
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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-controllable battery module and a temperature control method thereof, and the temperature-controllable battery module comprises a shell, a plurality of battery cells and a control board, wherein the plurality of battery cells are arranged in the shell at intervals, an air duct gap for heat exchange is arranged between every two adjacent battery cells, a heating sheet and a fan are sequentially arranged at the inlet and/or the outlet of the air duct gap, a battery cell temperature sensor is arranged on each battery cell, and the control board is respectively connected with the plurality of battery cells, the battery cell temperature sensors, the heating sheets and the fans. The invention has simple structure, can quickly carry out self-heating and cooling on the battery cell, and has more efficient temperature control on the battery cell.
Description
Technical Field
The invention relates to the technical field of automobile batteries, in particular to a temperature-controllable battery module and a temperature control method thereof.
Background
With the development of electric automobile technology, power batteries are widely used in vehicles. Vehicles are typically required to be capable of operating in the range of-20 degrees to 60 degrees, and current power battery packs are typically unable to meet such a wide operating temperature range. Therefore, the battery pack needs to be cooled at a high temperature and heated at a low temperature, so that stable and efficient operation of the power battery is guaranteed.
For the current mainstream battery module, when the temperature of the module is too high, the temperature of the module is lowered by contacting the bottom of the module through a medium in a cooling liquid cooling plate and a liquid cooling plate in a battery thermal management system; when the module temperature is low excessively, need be through the medium in the heating liquid cold plate, liquid cold plate contact module bottom in the rethread battery thermal management system realizes the module and heaies up. The module temperature rising and reducing mode has high dependence degree on a battery system and low temperature rising and reducing efficiency; moreover, in some special structures, some modules can not contact or partially contact the liquid cooling plate, so that the temperature control is not uniform; meanwhile, the above manner of heating and cooling by the liquid cooling plate requires a complex thermal management component to be designed in the battery pack, and the requirement on the sealing performance of the battery pack is strict.
CN108123187A discloses a distributed cooling system, including a battery box, be equipped with electric core in the battery box, a plurality of electric cores constitute a set of battery module, be equipped with more than a set of battery module in the battery box, every group battery module correspondence is equipped with one or a set of fan, but wind strength is adjusted independently to every fan or every group fan, be equipped with temperature feedback device and fan control device in the battery box, the temperature of electric core in the battery module is connected and measured to temperature feedback device, and with signal feedback to fan control device, fan control device connects and adjusts the wind strength of the fan that corresponds battery module, make the temperature more balanced between each battery module, make each battery module in the battery box reach unified temperature control target. A refrigerator or a heater is arranged at the air inlet of the fan to assist in adjusting the temperature of the air inlet. According to the scheme, each module in the sealed battery box is subjected to temperature control, so that heated or cooled airflow is conveyed and transferred among different modules, the final effect is that the temperature among the battery modules is more balanced, the heated or cooled airflow cannot directly penetrate into the modules and is in direct contact with the battery cells in the modules for heat exchange, and the control and balance of the temperature of the battery cells are quickly realized; and the gas in fan air inlet department needs earlier through heating or cooling treatment, carries between the module again, therefore heating or cooling efficiency to the electric core are lower.
CN106374166A discloses a two control by temperature change antidetonation type battery systems for new forms of energy electric automobile to specifically disclose: a PTC heating sheet is arranged between two adjacent battery monomers, a first exhaust port is formed in the right side of the battery box body, and a first filter screen and a first exhaust fan are arranged in the first exhaust port; and a second exhaust port is formed in the left side of the battery box body, and a second filter screen and a second exhaust fan are arranged at the second exhaust port. When the temperature that detects as temperature sensor is greater than and sets for the high temperature threshold value, the controller control first exhaust fan, second exhaust fan are opened simultaneously, ventilate the heat dissipation to battery box inside, and when the temperature that detects as temperature sensor was less than and sets for the low temperature threshold value, the controller control PTC heating plate switched on to promote the temperature in the battery box. In the scheme, the PTC heating plates are arranged between the adjacent monomers, so that the number of the PTC is large, and the connecting circuit of the controller correspondingly connected with each PTC is complicated, namely the structure and the preparation process of the whole temperature rise control are complicated; and the failure of any one of all PTC leads to the problem of temperature control of the corresponding monomer, and influences the uniformity of the monomer in the whole battery box. In addition, each battery cell cannot be swept in the ventilation and heat dissipation process, and the single body is cooled by convection of cold air in the box body, so that the cooling efficiency is low.
CN206349463U discloses an air duct structure of a battery pack heat management system, which includes an air duct, a fan, an evaporator and a PTC heater, wherein a refrigeration component evaporator and the PTC heater are installed at one end of the air duct to form a heat exchange system of the battery pack heat management system, four battery modules are respectively installed at two sides of the air duct, the fan is arranged in the air duct, each of the eight battery modules corresponds to one fan, the fan is installed on the fan through a fixing bolt, and a sealing gasket is further installed between the fan and the air duct. Similar with above-mentioned prior art, above-mentioned scheme is to carry out the control by temperature change to every module wherein in sealed battery package, consequently the air current of heating or cooling carries and heat transfer between different modules, though can make temperature more balanced between the battery module, but can not be with heating or cooling air current direct deep into inside the module, carry out heat exchange with the inside electric core direct contact of module, and then realize electric core temperature's control and equilibrium fast. In the scheme, when the temperature is raised, PTC heating is carried out on the area where the non-module is located in the battery pack, and after corresponding air is heated, hot air is slowly blown to the periphery of each module through the turbulent flow effect of 8 fans, so that the temperature raising efficiency is low; during the cooling, at first need carry out the evaporimeter heating through the regional of non-module place in the battery package at first, corresponding air is cooled down the back, slowly sweeps around every module with cold air through the vortex effect of 8 fans, therefore cooling efficiency is also low.
Disclosure of Invention
The invention aims to solve the technical problem that the battery module with controllable temperature and the temperature control method thereof are provided aiming at the defects in the prior art, the battery module is simple in structure, can quickly self-heat and cool the battery core, and is more efficient in temperature control of the battery core.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a controllable battery module of temperature, includes casing, a plurality of electric cores and control panel, and a plurality of electric core interval arrangements have been arranged in the casing, have arranged the wind channel clearance that is used for the heat transfer between the adjacent electric core, and heating plate and fan have been arranged in proper order to the import and/or the export in wind channel clearance, are equipped with electric core temperature sensor on the electric core, and the control panel is connected with a plurality of electric cores, electric core temperature sensor, heating plate and fan respectively.
According to the technical scheme, the shell comprises the front end plate, the rear end plate, the left side plate and the right side plate are arranged oppositely, two ends of the front end plate are connected with one ends of the left side plate and the right side plate respectively, two ends of the rear end plate are connected with the other ends of the left side plate and the right side plate respectively, and the heating plate is attached to the outer side of the left side plate and/or the outer side of the right side plate.
According to the technical scheme, the heating plate, the left side plate and the right side plate are all of grid structures.
According to the technical scheme, the safety cover is uniformly arranged on the outer sides of the left side plate and the right side plate, and the fan is fixedly arranged on the safety cover and arranged between the safety cover and the heating sheet.
According to the technical scheme, the end plate is provided with the high-voltage output electrode, and the high-voltage output electrode is connected with the battery core.
According to the technical scheme, the heating sheet is one of a carbon fiber heating sheet, a ceramic heating sheet, a PTC sheet, a silica gel heating sheet or a conductive silver adhesive heating sheet.
According to the technical scheme, the control board is a PCBA control board.
According to the technical scheme, three cell temperature sensors are arranged on each cell and used for respectively testing the head temperature T1, the tail temperature T2 and the intermediate temperature T3 of the cell.
A temperature control method adopting the temperature-controllable battery module is characterized in that each battery cell is provided with three battery cell temperature sensors for respectively testing the head temperature T1, the tail temperature T2 and the intermediate temperature T3 of the battery cell, and the temperature control method comprises the following steps:
when the current I of a high-voltage loop where the battery cell is located is larger than a preset value of the current of the high-voltage loop and exceeds a preset time t, entering a refrigeration working condition;
and when any one of the cell temperatures T1, T2 and T3 is greater than the preset upper limit temperature T0, entering a refrigeration working condition.
And when any one of the cell temperatures T1, T2 and T3 is less than the preset lower limit temperature T0', entering a heating working condition.
And when the cell temperatures T1, T2 and T3 all simultaneously satisfy T0' or more and T0 or less, exiting from the heating working condition or the cooling working condition.
According to the technical scheme, when the battery module needs to enter a heating working condition, the control panel controls the heating sheet to be started, the corresponding fan rotates reversely, the fan blows air to the interior of the battery cell, and heat generated by the heating sheet is blown into the interior of the shell;
when the battery module needs to enter a refrigeration working condition, the control panel controls the electric fan to rotate forwards, air is sucked from the inside of the battery core to the outside of the shell, and heat in the battery core is taken out to realize refrigeration; or the control panel controls the electric fan to rotate reversely, the electric fan blows air to the inside of the electric core, and cold air outside the shell is brought into the inside of the electric core to realize refrigeration.
The invention has the following beneficial effects:
the heating sheet is designed in the module structure, when the temperature needs to be raised, the heating in the module can firstly raise the temperature of partial area of the module, and then the hot air flow generated by self-heating is directly blown to pass through the air channel gap of the battery cell to exchange heat with the battery cell through the turbulence effect of the fan, so that the whole module is rapidly raised in temperature; when needs cooling, adopt outside cold air current directly to sweep the wind channel clearance that passes electric core and carry out the heat exchange with electric core, make whole module rapid cooling. Meanwhile, the refrigerating and heating process of the invention avoids the problems of complex structural design and low temperature control efficiency of the prior art that the air at the fan opening is heated or refrigerated in advance and then the hot air or the cold air is conveyed to the module. The invention has simple structure and can rapidly carry out self-heating and cooling on the battery cell. The corresponding heating or cooling process of the battery module adopts hot air flow or external cold air flow generated by self-heating of the heating plate to directly sweep and pass through the air duct gap of the battery cell to exchange heat with the battery cell, so that the temperature control of the battery cell is more efficient; meanwhile, the temperature of the battery module is controlled without preheating or cooling the air at the air inlet of the fan, so that the temperature rising and reducing efficiency of the battery module is improved.
Drawings
Fig. 1 is an exploded view of a temperature-controllable battery module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a temperature-controllable battery module according to an embodiment of the present invention;
in the figure, 1-battery cell, 2-PCBA control board, 3-end board, 4-high voltage output pole, 5-side board, 6-PTC sheet, 7-fan, 8-safety cover, 9-upper protective cover.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 to 2, a temperature-controllable battery module in an embodiment of the present invention includes a housing, a plurality of battery cells 1 and a control board, the plurality of battery cells 1 are arranged in the housing at equal intervals along a length direction, an air duct gap for heat exchange is arranged between adjacent battery cells 1, a heater sheet and a fan 7 are sequentially arranged at an inlet and/or an outlet of the air duct gap, a battery cell temperature sensor is arranged on each battery cell 1, and the control board is respectively connected to the plurality of battery cells 1, the battery cell temperature sensors, the heater sheet and the fan 7.
Further, the casing includes front end board, back end board, left side board and right side board, and left side board and right side board are parallel arrangement relatively, and the both ends of front end board are connected with the one end of left side board and right side board respectively, and the both ends of back end board are connected with the other end of left side board and right side board respectively, and the hot plate is laminated in the outside of left side board and/or right side board.
Furthermore, the heating plate, the left side plate and the right side plate are all of grid structures; the gaps among the electric cores 1 and the grid gaps on the left side plate and the right side plate form air duct gaps together.
Furthermore, safety covers 8 are arranged on the outer sides of the left side plate and the right side plate, and the fan 7 is fixedly arranged on the safety covers 8 and arranged between the safety covers 8 and the heating sheets.
Furthermore, a high-voltage output electrode 4 is arranged on the end plate 3, and the high-voltage output electrode 4 is connected with the battery core 1.
Further, the heating plate is one of a carbon fiber heating plate, a ceramic heating plate, a PTC plate 6, a silica gel heating plate or a conductive silver adhesive heating plate.
Further, the heating sheet is preferably a PTC sheet 6, and the PTC sheet 6 is bonded to the side plates by hot melt adhesive, or the PTC sheet 6 and the side plates are bonded by hot pressing.
Further, the control board is a PCBA control board 2.
Further, each battery cell 1 is provided with three battery cell temperature sensors, which are respectively arranged at the head, the tail and the middle of the battery cell 1 and are used for respectively testing the head temperature T1, the tail temperature T2 and the middle temperature T3 of the battery cell 1.
Further, the fan 7 is connected with a motor, and the motor drives the fan 7 to rotate forward and backward.
Further, a hollow hole is formed in the safety cover 8, and an upper protective cover 9 is arranged at the upper end of the shell.
A temperature control method adopting the temperature-controllable battery module is characterized in that three battery cell temperature sensors are arranged on each battery cell 1 and used for respectively testing the head temperature T1, the tail temperature T2 and the intermediate temperature T3 of the battery cell 1, and the temperature control method comprises the following steps:
when the current I of a high-voltage loop where the battery cell 1 is located is larger than a preset value of the current of the high-voltage loop and exceeds a preset time t, entering a refrigeration working condition;
and when any one of the temperatures T1, T2 and T3 of the battery cell 1 is greater than the preset upper limit temperature T0, entering a refrigeration working condition.
And when any one of the temperatures T1, T2 and T3 of the battery cell 1 is less than the preset lower limit temperature T0', entering a heating working condition.
And when the temperatures T1, T2 and T3 of the battery cell 1 simultaneously satisfy T0' or more and T0 or less, exiting from the heating working condition or the cooling working condition.
When the battery module needs to enter a heating working condition, the control panel controls the heating sheet to be started, the motor adjacent to the heating sheet rotates reversely, the corresponding fan 7 rotates reversely, the fan 7 blows air to the interior of the battery core 1, and heat generated by the heating sheet is blown into the interior of the shell;
when the battery module needs to enter a refrigeration working condition, the control panel controls the motor to rotate forward, the electric fan rotates forward, air is sucked from the inside of the battery core 1 to the outside of the shell, and heat in the battery core 1 is taken out to realize refrigeration; or the control panel controls the motor to rotate reversely, the fan rotates reversely, the fan 7 blows air to the inside of the battery cell 1, and cold air outside the shell is brought into the inside of the battery cell 1 to realize refrigeration.
Further, the battery module includes two sets of fans 7 and safety guard 8 about, when the battery module needs to get into the refrigeration operating mode, can adopt any one of following four kinds of implementation:
(1) the PCBA controls the right motor to rotate positively, and the corresponding right electric fan rotates positively; the left motor rotates reversely, and the corresponding left fan rotates reversely, so that external cold air can enter from the left safety cover 8 of the module and flow through the air duct gap between the electric cores 1, and the hot air coming out from the right safety cover 8 of the module can take away heat inside the module;
(2) the PCBA control board 2 controls the right motor to rotate reversely, and the corresponding right fan 7 rotates reversely; controlling the left motor to rotate positively, and correspondingly rotating the left fan 7 positively; cold air can enter from the safety cover 8 on the right side of the module and flows through the air duct gap between the electric cores 1, and hot air from the safety cover 8 on the left side of the module can take away heat inside the module;
(3) the PCBA controls the left motor and the right motor to rotate forwards, and correspondingly, the left fan and the right fan rotate forwards; the left fan 7 and the right fan 7 can exhaust air from the inside of the battery cell 1 to the outside of the left side and the right side of the module, and take out heat inside the module;
(4) the PCBA controls the left motor and the right motor to rotate reversely, and correspondingly, the left fan and the right fan rotate reversely; control fan 7 can realize blowing to the module centre from the module left and right sides outside, brings the outside cold air of module into inside electric core 1.
Further, the battery module includes a heating plate and two sets of fans 7 and safety guard 8 about with, when the battery module need get into the operating mode of heating, the motor and the fan 7 of heating plate are kept away from in the control of PCBA control panel 2 and are closed, and the heating plate is opened, and the motor reversal of next-door neighbour heating plate, corresponding fan 7 reversal, fan 7 near the heating plate is bloied to electric core 1 inside, blows in the module with the heat that the heating plate produced inside.
The battery module comprises a left heating piece, a right heating piece, a left fan 7, a right fan 7 and a safety cover 8, when the battery module needs to enter a heating working condition, the PCBA control board 2 controls the left heating piece and the right heating piece to be opened, the left motor and the right motor to rotate reversely, and the corresponding left fan and the corresponding right fan to rotate reversely; control fan 7 and all blow to electric core 1 inside, will control the heat that the heating plate produced and blow in inside the module.
In an embodiment 1 of the present invention, a temperature-controllable battery module, as shown in fig. 1, includes a battery core 1, a PCBA control board 2, front and rear end plates 3, a high-voltage output electrode 4 is disposed on the front and rear end plates, left and right side plates 5, a PTC sheet 6 is disposed on the outer side of the right side plate, and a right fan 7 with a motor and a right safety cover 8 are disposed on the outer side of the PTC sheet.
Air duct gaps for heat exchange are arranged between the adjacent electric cores 1; the side plates and the PTC are arranged with a grid structure, and preferably, both grid structures are identical and the grids are aligned in number and position. As shown in FIG. 1, 23 grids are arranged on the right side plate and the PTC sheet, and the actual grid number can be adjusted according to requirements. The left and right side plates 5 are connected with the front and rear end plates 3 in a welding mode. The PTC sheet and the right side plate can be connected by hot melt adhesive or directly connected by a hot pressing mode. The safety cover can be fixed on the module through screw connection or bonding and other modes. PCBA control panel is used for monitoring the electric current and the electric core temperature of module, controls opening of motor fan and opening of PTC piece and stops, PTC realizes the heating to the module by module self power supply. The module further includes a cell temperature sensor (not shown in the drawings), a lower protection cover (not shown in the drawings), and an upper protection cover 9 (see 9 in fig. 2). The overall structure of the battery module is schematically shown in fig. 2.
The temperature control method of the battery module specifically comprises the following steps:
when the battery module needs to enter the refrigeration working condition:
the PCBA controls the motor to rotate forwards, and the fan rotates forwards, so that the fan exhausts air from the inside of the battery cell to the outside of the module, and heat in the module is taken out to realize refrigeration;
or, PCBA control motor reversal, the electric fan reversal, therefore the fan is bloied to electric core inside, brings the outside cold air of module into electric core inside and realizes the refrigeration.
When the battery module needs to enter the heating working condition:
PCBA control PTC piece is opened, and the motor reversal, the electric fan reversal, therefore the fan is bloied to electric core inside, blows in the module with the heat that the PTC piece produced inside.
And further, when the high-voltage loop current I is larger than the preset high-voltage loop current I preset value and exceeds the preset time t preset, the refrigeration working condition is started.
Further, when any one of the cell temperatures T1, T2 and T3 is greater than the preset temperature T0, the refrigeration condition is entered.
Further, when any one of the cell temperatures T1, T2 and T3 is less than the preset temperature T0', a heating working condition is entered.
Further, when the cell temperatures T1, T2, and T3 all satisfy T0' or more and T0 or less at the same time, the heating operation or the cooling operation is exited.
Compared with the prior art, the PTC heating source is designed in the module structure, when the temperature needs to be raised, the PTC in the module can firstly raise the temperature of partial area of the module, and then the hot air generated by self-heating is directly blown to pass through the air channel gap of the battery cell to exchange heat with the battery cell through the turbulence action of the fan, so that the whole module is rapidly raised in temperature; when needs cooling, adopt outside cold air current directly to sweep the wind channel clearance that passes electric core and carry out the heat exchange with electric core, make whole module rapid cooling. Meanwhile, the refrigerating and heating process of the invention avoids the problems of complex structural design and low temperature control efficiency of the prior art that the air at the fan opening is heated or refrigerated in advance and then the hot air or the cold air is conveyed to the module.
In embodiment 2 of the present invention, the battery module structure of the present embodiment is similar to that of embodiment 1, except that a fan with a motor and a safety cover are provided on the outer side of the left side plate in addition to the module structure of embodiment 1.
The method for controlling the temperature of the battery module in the embodiment 2 comprises the following steps:
when the battery module needs to enter a refrigeration working condition, any one of the following four implementation modes can be adopted:
(1) the PCBA controls the right motor to rotate positively, and the corresponding right electric fan rotates positively; the left motor rotates reversely and the corresponding left fan rotates reversely, so that external cold air can enter from the left safety cover of the module and flow through the air duct gap between the battery cores, and hot air coming out from the right safety cover of the module can take away heat inside the module;
(2) the PCBA control board controls the right motor to rotate reversely, and the corresponding right fan rotates reversely; controlling the left motor to rotate positively, and correspondingly rotating the left fan positively; cold air can enter from the safety cover on the right side of the module and flows through the air duct gaps among the battery cores, and hot air coming out of the safety cover on the left side of the module can take away heat inside the module;
(3) the PCBA controls the left motor and the right motor to rotate forwards, and correspondingly, the left fan and the right fan rotate forwards; the left fan and the right fan can exhaust air from the inside of the battery core to the outside of the left side and the right side of the module, and heat inside the module is taken out;
(4) the PCBA controls the left motor and the right motor to rotate reversely, and correspondingly, the left fan and the right fan rotate reversely; the fan can realize blowing to the module middle from the module left and right sides outside about, brings the outside cold air of module into inside the electric core.
When the battery module need get into the working condition of heating, PCBA control panel control left side motor and fan are closed, and the PTC piece is opened, and the right side motor reverses, and the right side fan is bloied to electricity core inside, blows in the module with the heat that the PTC piece produced inside.
Correspondingly, the conditions for entering (or exiting) the cooling or heating working condition for the high-voltage loop current I and the cell temperatures T1, T2 and T3 are the same as those in embodiment 1.
In an embodiment 3 of the present invention, the battery module structure of the present embodiment is similar to that of embodiment 1, except that a PTC sheet, a fan with a motor, and a safety cover are provided on the outer side of the left side plate in addition to the module structure of embodiment 1.
The method for controlling the temperature of the battery module in the embodiment 3 includes:
when the battery module needs to enter the refrigeration working condition, the corresponding control method is the same as that of the embodiment 2.
When the battery module needs to enter a heating working condition, the PCBA controls the left PTC sheet and the right PTC sheet to be both opened, the left motor and the right motor to both rotate reversely, and the corresponding left electric fan and the corresponding right electric fan both rotate reversely; control the fan and all blow to electric core inside, will control the heat that PTC piece produced and insufflate inside the module.
Correspondingly, the conditions for entering (or exiting) the cooling or heating working condition for the high-voltage loop current I and the cell temperatures T1, T2 and T3 are the same as those in embodiment 1.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (10)
1. The utility model provides a controllable battery module of temperature, its characterized in that, includes casing, a plurality of electric cores and control panel, and a plurality of electric core interval arrangements have been arranged in the casing, have arranged the wind channel clearance that is used for the heat transfer between the adjacent electric core, and heating plate and fan have been arranged in proper order to the import and/or the export in wind channel clearance, are equipped with electric core temperature sensor on the electric core, and the control panel is connected with a plurality of electric cores, electric core temperature sensor, heating plate and fan respectively.
2. The temperature-controllable battery module according to claim 1, wherein the housing comprises a front plate, a rear plate, a left plate and a right plate, the left plate and the right plate are arranged oppositely, two ends of the front plate are respectively connected with one ends of the left plate and the right plate, two ends of the rear plate are respectively connected with the other ends of the left plate and the right plate, and the heating plate is attached to the outer side of the left plate and/or the right plate.
3. The temperature-controllable battery module according to claim 2, wherein the heating sheet, the left side plate and the right side plate are all in a grid structure.
4. The temperature-controllable battery module as claimed in claim 2, wherein a safety cover is disposed on the outer sides of the left and right side plates, and the fan is fixed on the safety cover and disposed between the safety cover and the heating plate.
5. The temperature-controllable battery module as claimed in claim 2, wherein the end plate is provided with a high-voltage output electrode, and the high-voltage output electrode is connected with the battery core.
6. The temperature-controllable battery module according to claim 1, wherein the heater chip is one of a carbon fiber heater chip, a ceramic heater chip, a PTC chip, a silicone heater chip, or a conductive silver paste heater chip.
7. The temperature-controllable battery module according to claim 1, wherein the control board is a PCBA control board.
8. The temperature-controllable battery module as claimed in claim 1, wherein three cell temperature sensors are provided on each cell for respectively testing the cell head temperature T1, the cell tail temperature T2 and the intermediate temperature T3.
9. The temperature control method of the temperature-controllable battery module set forth in claim 1, wherein three cell temperature sensors are provided on each cell for respectively testing a cell head temperature T1, a cell tail temperature T2 and an intermediate temperature T3, and the temperature control method comprises the following steps:
when the current I of a high-voltage loop where the battery cell is located is larger than a preset value of the current of the high-voltage loop and exceeds a preset time t, entering a refrigeration working condition;
and when any one of the cell temperatures T1, T2 and T3 is greater than the preset upper limit temperature T0, entering a refrigeration working condition.
And when any one of the cell temperatures T1, T2 and T3 is less than the preset lower limit temperature T0', entering a heating working condition.
And when the cell temperatures T1, T2 and T3 all simultaneously satisfy T0' or more and T0 or less, exiting from the heating working condition or the cooling working condition.
10. The temperature control method according to claim 9, wherein when the battery module needs to enter a heating condition, the control board controls the heating sheet to be turned on, the corresponding fan rotates reversely, the fan blows air into the battery core, and heat generated by the heating sheet is blown into the shell;
when the battery module needs to enter a refrigeration working condition, the control panel controls the electric fan to rotate forwards, air is sucked from the inside of the battery core to the outside of the shell, and heat in the battery core is taken out to realize refrigeration; or the control panel controls the electric fan to rotate reversely, the electric fan blows air to the inside of the electric core, and cold air outside the shell is brought into the inside of the electric core to realize refrigeration.
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Application publication date: 20201225 |