CN105548891A - Battery heat test device and battery heat test method - Google Patents

Battery heat test device and battery heat test method Download PDF

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Publication number
CN105548891A
CN105548891A CN201510868096.8A CN201510868096A CN105548891A CN 105548891 A CN105548891 A CN 105548891A CN 201510868096 A CN201510868096 A CN 201510868096A CN 105548891 A CN105548891 A CN 105548891A
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China
Prior art keywords
water
heat
thermal
calorimeter
insulating chamber
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CN201510868096.8A
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CN105548891B (en
Inventor
陆群
陈殿领
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CH Auto Technology Co Ltd
Beijing Changcheng Huaguan Automobile Technology Development Co Ltd
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Beijing Changcheng Huaguan Automobile Technology Development Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385Arrangements for measuring battery or accumulator variables

Abstract

The present invention discloses a battery heat test device and a battery heat test method. A battery to be tested is disposed in a thermotank and is subjected to heat test in the charge-discharge process. Specifically, the battery to be tested is disposed in a heat insulation chamber, the heat emitted by the battery to be tested is led out of the heat insulation chamber and heat of a cooling liquid is accumulated through adoption of a cooling liquid circulatory system, and the accumulated heat consumption of the battery to be tested is obtained in the charge-discharge process. The battery heat test device and the battery heat test method are able to effectively and accurately measure the heat emitted by a battery to be tested in the charge-discharge process, so that the first-hand reliable information is provided for actual understanding of the heat condition of the battery or the battery pack, effective heat management and effective improvement of heat safety of a lithium ion battery for an electric car, therefore the battery heat test device and the battery heat test method are very important to the heat management and the heat safety of an electric car.

Description

Cell heat proving installation and cell heat method of testing
Technical field
The present invention relates to accumulator testing field, particularly a kind of cell heat proving installation and cell heat method of testing.
Background technology
The thermal value of accurate measurement battery has great significance to the heat management of electric automobile and thermal safety, to the thermal runaway of management and control power brick with reasonably implement thermal management policy and then have indispensable effect to the security of electric motor car.If the control of battery-heating buret is bad, very likely cause the blast of electric motor car, the potential safety hazard such as on fire.Thus, no matter the formulation of opposite heat tube reason strategy or the security for electric motor car, the measurement of battery-heating amount all seems particularly important.
Knowing of the thermal value of existing battery, is generally calculated as master with model.The battery-heating amount obtained by thermal models such as emulating, simulate, be approximate is difficult to fully demonstrate the complicated thermal process reactor such as inside battery Joule heat, reaction heat, thus the heat reflecting that inside battery distributes exactly is difficult to, can not for findding out the heating situation of battery or power brick, carry out heat management effectively, the thermal safety improving lithium ion battery used for electric vehicle provides reliable basis.
Summary of the invention
In view of this, the object of this invention is to provide a kind of the cell heat proving installation and the cell heat method of testing that can be used for soft bag lithium ionic cell monomer, to obtain the true thermal value in battery charge and discharge process, thus for findding out the heating situation of battery or power brick, carry out heat management effectively, the thermal safety improving lithium ion battery used for electric vehicle provides reliable basis.
The invention provides a kind of cell heat proving installation, comprising:
Constant temperature oven;
Thermal-insulating chamber, described thermal-insulating chamber is positioned at described constant temperature oven;
Water tank group, filling liquid cooling medium in described water tank group, and clamp tested battery, described water tank group is placed in described thermal-insulating chamber together with described tested battery;
Water pipe group, described water pipe group is positioned at constant temperature oven, water tank group, water pump, calorimeter, heating radiator are communicated with by described water pipe group, to be formed by described water tank group through described water pump to described calorimeter, returned described calorimeter, again by the circulation line of described calorimeter to described water tank group, described cooling medium circulated in described circulation line to described heating radiator by described heating radiator by described calorimeter again;
Water pump, described water pump is positioned at constant temperature oven, and is positioned at beyond described thermal-insulating chamber, for driving the circulation of the cooling medium in described circulation line;
Calorimeter, described calorimeter is positioned at constant temperature oven, and is positioned at beyond described thermal-insulating chamber, for obtaining the heat accumulative value of the liquid coolant flowing through this calorimeter;
Heating radiator, described heating radiator is positioned at constant temperature oven, and is positioned at beyond described thermal-insulating chamber, for being distributed in constant temperature oven by heat entrained in the cooling medium flowing through this heating radiator;
At least one temperature sensor, is arranged in described tested battery surface, for obtaining the temperature information of described tested battery surface;
Electrode connection port, it is outer and be electrically connected on the lug of described tested battery that described Electrode connection port is positioned at described thermal-insulating chamber, described Electrode connection port is for connecting outside charging/discharging apparatus, and its profile design becomes repeatedly warp architecture to increase the area of dissipation that contacts with water tank group, and minimizing is connected with the leader cable of charging/discharging apparatus the heat caused and leaks;
Computing machine, described computer bit is outside described constant temperature oven, and be connected to described calorimeter and at least one temperature sensor, described computing machine for receive at least one temperature sensor described and obtain temperature information, receive the heat accumulative value that described calorimeter obtains.
Further, described cell heat proving installation also comprises:
Pressure transducer, described pressure transducer is positioned at described thermal-insulating chamber and is connected to described computing machine, and described pressure transducer puts on the pressure information of described tested battery for obtaining described water tank group and sends it to described computing machine and monitor.
Further, described cell heat proving installation also comprises:
Electrode heat conduction connector, described electrode heat conduction connector is positioned at described thermal-insulating chamber, one end of described electrode heat conduction connector is connected to the lug of described tested battery, the other end of described electrode heat conduction connector is as described Electrode connection port, described electrode heat conduction connector surface coverage heat conductive insulating silica gel, described water tank group is pressed in described heat conductive insulating silica gel.
Further, described water tank group comprises lower header and upper water box; Wherein,
Described lower header is positioned at the downside of described tested battery, and described upper water box is positioned at the upside of described tested battery, and described tested battery is between described lower header and upper water box;
By a soft pipe connection between described lower header and upper water box, the liquid coolant in described lower header is made to enter described upper water box by described flexible pipe;
Water inlet offered by described lower header, to connect described water pipe group, makes the liquid coolant in described water pipe group flow to described lower header by described water inlet;
Described upper water box sets out the mouth of a river, to connect described water pipe group, makes the liquid coolant in described upper water box flow out described upper water box by described water delivering orifice.
Further, described thermal-insulating chamber offers and described water inlet and the suitable through hole of water delivering orifice, with make to be positioned at the water tank group of thermal-insulating chamber and be positioned at water pump outside thermal-insulating chamber, calorimeter, heating radiator be communicated with by described water pipe group.
Further, described water pipe group comprises:
Rising pipe, described rising pipe is connected between the water delivering orifice of described upper water box and the water inlet of described water pump;
First mozzle, between the water delivering orifice that described first mozzle is connected to described water pump and the water inlet of calorimeter;
Second mozzle, described second mozzle is connected between the heat radiation water delivery nozzle of described calorimeter and the water inlet of heating radiator;
3rd mozzle, described 3rd mozzle is connected between the water delivering orifice of heating radiator and the heat radiation water return outlet of described calorimeter;
Water inlet pipe, described water inlet pipe is connected between the water delivering orifice of described calorimeter and the water inlet of described lower header.
Further, at least one temperature sensor described is arranged in described tested battery surface, the lug of tested battery, upper water box and in lower header respectively, and be connected to described computing machine, to obtain in described tested battery surface temperature information, the lug temperature information of tested battery, upper water box temperature information in temperature information and lower header, and obtained temperature information is sent to described computing machine.
Further, described thermal-insulating chamber comprises thermal-insulating chamber body and thermal-insulating chamber lid; Wherein,
Described thermal-insulating chamber body interior forms the spatial accommodation of a upper opening, and described water tank group is placed in described spatial accommodation together with described tested battery;
Described thermal-insulating chamber lid is arranged at the top of described thermal-insulating chamber body, and under the control of an opening and closing motor, open, close the opening of described spatial accommodation, wherein, described opening and closing motor is electrically connected on described computing machine, to perform the opening of described thermal-insulating chamber lid, shutoff operation under the control of described computing machine.
Further, described thermal-insulating chamber offers and vacuumizes interface to extract the air dielectric in thermal-insulating chamber out, avoids absorption of air from battery liberated heat.
Present invention also offers a kind of method adopting the cell heat proving installation as above described in any one to carry out cell heat test, comprising:
Tested battery is inserted between the water tank group in thermal-insulating chamber, and the lug of tested battery is electrically connected on Electrode connection port;
Outside charging/discharging apparatus is connected to described Electrode connection port;
The all parts being positioned at described constant temperature oven carry out initial temperature balance;
By the temperature information of each temperature sensor of computer real-time monitoring;
After the temperature information of each temperature sensor all reaches initial temperature and be stable, store by computer real-time monitoring the temperature information and flow information that described calorimeter obtains;
Open described water pump to drive the circulation of the cooling medium in described circulation line;
Open outside charging/discharging apparatus to carry out discharge and recharge to described tested battery;
When discharge and recharge terminates, and the temperature information of each temperature sensor all get back to initial temperature and maintain the heat accumulative value of a period of time and/or calorimeter invariable time, stop test;
Using the heat that the heat accumulative value of calorimeter discharges in charge and discharge process as tested battery.
As can be seen from such scheme, cell heat proving installation of the present invention and cell heat method of testing can effectively and exactly measure the heat sent when tested battery carries out discharge and recharge, and then for know battery or power brick heating situation, carry out heat management effectively, and then effectively improve the thermal safety of lithium ion battery used for electric vehicle, provide first-hand authentic communication.
Accompanying drawing explanation
The following drawings only schematically illustrates the present invention and explains, not delimit the scope of the invention.
Fig. 1 is the cell heat proving installation cross-sectional structure schematic diagram of the embodiment of the present invention;
Fig. 2 is tested battery circumferential regional structure enlarged diagram in Fig. 1;
Fig. 3 is the longitudinal cross-section structural representation in the embodiment of the present invention in thermal-insulating chamber;
Fig. 4 is the method flow diagram of the cell heat test of the embodiment of the present invention.
Label declaration
1, cell heat proving installation
11, constant temperature oven
12, thermal-insulating chamber
121, thermal-insulating chamber body
122, thermal-insulating chamber lid
125, opening and closing motor
13, water tank group
131, lower header
132, upper water box
14, water pipe group
141, rising pipe
142, the first mozzle
143, the second mozzle
144, the 3rd mozzle
145, water inlet pipe
151, water pump
152, calorimeter
153, heating radiator
161, temperature sensor
162, pressure transducer
17, Electrode connection port
171, electrode heat conduction connector
18, interface is vacuumized
19, computing machine
2, tested battery
21, lug
211, lug intermediate plate
Embodiment
In order to the technical characteristic to invention, object and effect have understanding clearly, now contrast accompanying drawing and the specific embodiment of the present invention is described, label identical in the various figures represents identical part.
In this article, " schematically " expression " serves as example, example or explanation ", not should by being described to any diagram of " schematically " in this article, embodiment is interpreted as a kind of preferred or have more the technical scheme of advantage.
For making simplified form, in each figure, only schematically show part related to the present invention, and do not represent its practical structures as product.In addition, be convenient to make simplified form understand, there are the parts of identical structure or function in some figure, only schematically depict one of them, or only marked one of them.
In this article, " one " does not represent that by the restricted number of relevant portion of the present invention be " only this ", and " one " does not represent the situation of the quantity " more than one " getting rid of relevant portion of the present invention.
In this article, " on ", D score, "front", "rear", "left", "right" etc. only for representing the relative position relation between relevant portion, and the absolute position of these relevant portions non-limiting.
In this article, " first ", " second " etc. only for differentiation each other, but not represent significance level and order and the prerequisite etc. that exists each other.
In this article, the restriction in the mathematics of " equal ", " identical " etc. non-critical and/or geometry meaning, also comprise it will be appreciated by those skilled in the art that and manufacture or error that use etc. allows.Except as otherwise noted, numerical range herein not only comprises the gamut in two end points, also comprises the some subranges be contained in wherein.
As shown in Figure 1, the cell heat proving installation 1 of the embodiment of the present invention mainly comprises constant temperature oven 11, thermal-insulating chamber 12, water tank group 13, water pipe group 14, water pump 151, calorimeter 152, heating radiator 153, temperature sensor 161, pressure transducer 162, Electrode connection port 17 and computing machine 19.Wherein, other building block in the cell heat proving installation 1 except computing machine 19 is placed in described constant temperature oven 11.Described thermal-insulating chamber 12 is positioned at described constant temperature oven 11.Fill cooling medium (such as water) in described water tank group 13, and clamp tested battery 2, described water tank group 13 is placed in described thermal-insulating chamber together with described tested battery 2.Described water pipe group 14 is positioned at constant temperature oven 11, water tank group 13, water pump 151, calorimeter 152 are communicated with heating radiator 153 by described water pipe group 14, to be formed by described water tank group 13 through described water pump 151 to described calorimeter 152, returned described calorimeter 152, again by the circulation line of described calorimeter 152 to described water tank group 13, described cooling medium circulated in described circulation line to described heating radiator 153 by described heating radiator 153 by described calorimeter 152 again.Described water pump 151 is positioned at constant temperature oven 11, and is positioned at beyond described thermal-insulating chamber 12, for driving the circulation of the cooling medium in described circulation line.Described calorimeter 152 is positioned at constant temperature oven 11, and be positioned at beyond described thermal-insulating chamber 12, for obtain the cooling medium flowed out by described water tank group 13 in described circulation line temperature information, obtain in described circulation line the cooling medium flowing to described water tank group 13 temperature information, obtain and flow through the flow information of the cooling medium of described calorimeter 152.Described heating radiator 153 is positioned at constant temperature oven 11, and is positioned at beyond described thermal-insulating chamber 12, for being distributed in constant temperature oven 11 by heat entrained in the cooling medium flowing through this heating radiator 153.Described temperature sensor 161 quantity is at least one, is arranged in described tested battery 2 surface respectively, for obtaining the temperature information on described tested battery 2 surface.Described pressure transducer 162 is positioned at described thermal-insulating chamber 12, and described pressure transducer 162 puts on the pressure information of described tested battery 2 for obtaining described water tank group 13 and sends it to described computing machine 19 and monitor.It is outer and be electrically connected on the lug 21 of described tested battery 2 that described Electrode connection port 17 is positioned at described thermal-insulating chamber 12, and described Electrode connection port 17 is for connecting outside charging/discharging apparatus (not shown).Described computing machine 19 is positioned at outside described constant temperature oven 11, and be connected to described calorimeter 152, temperature sensor 161 and pressure transducer 162, described computing machine 19 for receive at least one temperature sensor 161 described and obtain temperature information, receive temperature information and flow information the heat that tested battery 2 sends according to received information acquisition when described tested battery 2 carries out discharge and recharge that described calorimeter 152 obtains; Described computing machine 19 is also for detecting by described pressure transducer 162 pressure information that described water tank group 13 puts on described tested battery 2, to guarantee the good contact between described water tank group 13 and described tested battery 2, the heat sent to enable tested battery 2 successfully passes to the liquid coolant in described water tank group 13 in time.
In addition, described cell heat proving installation 1 also comprises electrode heat conduction connector 171.Described electrode heat conduction connector 171 is positioned at described thermal-insulating chamber 12, one end of described electrode heat conduction connector 171 is connected to the lug 21 of described tested battery 2 by lug intermediate plate 211, the other end of described electrode heat conduction connector 171 is as described Electrode connection port 17, the surface coverage heat conductive insulating silica gel of described electrode heat conduction connector 171, described water tank group 13 is pressed in described heat conductive insulating silica gel.Described electrode heat conduction connector 171 is made up of high-quality conductive material and is processed into the more structure of the bending number of turn, liquid coolant in water tank group 13 is fully promptly transferred heat to when tested battery 2 carries out discharge and recharge to enable it, reduce the heat trnasfer to outside charging/discharging apparatus simultaneously, reduce thermal loss, avoid heat to leak.Described lug intermediate plate 211 is made up of high-quality conductive material, is held on lug 21 and is connected to electrode heat conduction connector 171, to reduce the contact resistance at lug 21 place.
As shown in Figure 2, multiple temperature sensor 161 is arranged in (not shown) in described tested battery 2 surface, the lug 21 of tested battery 2, water tank group 13 respectively, and be connected to described computing machine 19, to obtain temperature information in described tested battery 2 surface temperature information, lug 21 temperature information of tested battery 2, water tank group 13, and obtained temperature information is sent to described computing machine 19.In a specific embodiment, tested battery 2 surface uniform arranges nine temperature sensors 161, two lugs 21 respectively arrange a temperature sensor 161 together with lug intermediate plate 211 place, namely two temperature sensors 161 are arranged at two lugs 21 altogether together with lug intermediate plate 211 place, two temperature sensors 161 are arranged in water tank group 13, these temperature sensors 161 are connected with the computing machine 19 outside constant temperature oven 11 by data line, utilize the periphery associated temperature of the tested battery 2 of computing machine 19 Real-Time Monitoring.Pressure transducer 162 is adjusted to concordant with tested battery 2 surface, is convenient to detect the pressure that water tank group 13 is applied to tested battery 2 surface.
As shown in Figure 3, in the embodiment of the present invention, described water tank group 13 comprises lower header 131 and upper water box 132.Wherein, described lower header 131 is positioned at the downside of described tested battery 2, and described upper water box 132 is positioned at the upside of described tested battery 2, and described tested battery 2 is between described lower header 131 and upper water box 132.Shown in Fig. 1, Fig. 2, Fig. 3, be communicated with by a flexible pipe 133 between described lower header 131 and upper water box 132, make the liquid coolant in described lower header 131 enter described upper water box 132 by described flexible pipe 133.Described flexible pipe 133 is metal hose, to provide the good heat radiating at flexible pipe 133 place, water inlet offered by described lower header 131, to connect described water pipe group 14, the liquid coolant in described water pipe group 14 is made to flow to described lower header 131 by described water inlet, described upper water box 132 sets out the mouth of a river, to connect described water pipe group 14, makes the liquid coolant in described upper water box 132 flow out described upper water box 132 by described water delivering orifice.Described thermal-insulating chamber 12 offers and described water inlet and the suitable through hole of water delivering orifice, with make to be positioned at the water tank group 13 of thermal-insulating chamber 12 and be positioned at water pump 151 outside thermal-insulating chamber, calorimeter 152, heating radiator 153 be communicated with by described water pipe group 14.Two temperature sensors 161 be positioned in water tank group 13 are positioned in lower header 131 and upper water box 132 respectively.
Continue shown in Figure 3, described thermal-insulating chamber 12 comprises thermal-insulating chamber body 121 and thermal-insulating chamber lid 122.Wherein, described thermal-insulating chamber body 121 inside forms the spatial accommodation of a upper opening, and described water tank group 13 is placed in described spatial accommodation together with described tested battery 2.Described thermal-insulating chamber lid 122 is arranged at the top of described thermal-insulating chamber body 121, and under the control of an opening and closing motor 125, open, close the opening of described spatial accommodation, wherein, described opening and closing motor 125 is electrically connected on described computing machine 19, to perform the opening of described thermal-insulating chamber lid 122, shutoff operation under the control of described computing machine 19.For ensureing the precision measured, described opening and closing motor 125 is preferably arranged in constant temperature oven 11.In addition, described thermal-insulating chamber body 121 internal side wall is provided with water tank guide rail, and described water tank group 13 is provided with the guide-track groove suitable with described water tank guide rail, and then is convenient to water tank group 13 and can moves along predetermined direction.
In addition, carrying out the heat amount test of tested battery 2, thermal-insulating chamber 12 preferably keeps vacuum state, to prevent the impact of existing air in thermal-insulating chamber 12.Therefore, in the embodiment of the present invention, also comprise vaccum-pumping equipment (not shown), and as shown in Figure 1, thermal-insulating chamber 12 offers and vacuumizes interface 18, to be connected with described vaccum-pumping equipment.After the tested battery 2 of loading, and before carrying out the heat amount test of tested battery 2, vaccum-pumping equipment is utilized to vacuumize in thermal-insulating chamber 12.
As shown in Figure 1, in the embodiment of the present invention, described water pipe group 14 comprises rising pipe 141, first mozzle 142, second mozzle 143, the 3rd mozzle 144 and water inlet pipe 145.Wherein, between described rising pipe 141 water delivering orifice that is connected to described upper water box 132 and the water inlet of described water pump 151.Between the water delivering orifice that described first mozzle 142 is connected to described water pump 151 and the water inlet of calorimeter 152.Between the heat radiation water delivery nozzle that described second mozzle 143 is connected to described calorimeter 153 and the water inlet of heating radiator 153.Described 3rd mozzle 144 is connected between the water delivering orifice of heating radiator 153 and the heat radiation water return outlet of described calorimeter 152.Between the water delivering orifice that described water inlet pipe 145 is connected to described calorimeter 152 and the water inlet of described lower header 131.
In order to prevent cooling medium the scattering and disappearing of heat in circulation line, in water pipe group 14, the peripheral and coated thermal insulation material in each interface section, makes heat entrained by cooling medium only be dispersed in constant temperature oven 11 by heating radiator 153.
In the embodiment of the present invention, PT1000 sensor is adopted as temperature sensor to measure in water pipe 141 temperature of the cooling medium flowing to calorimeter 152 (namely flowing out upper water box 132) in calorimeter 152, and measure the temperature flowing out the cooling medium of calorimeter 152 (namely flowing to lower header 131) in water inlet pipe 145, adopt turbo flow meter as flow sensor, to measure the flow of cooling medium in circulation line.Adopt integrating instrument to carry out heat Calculation in calorimeter 152, and/or utilize computing machine 19 to carry out heat Calculation, calculating is the temperature that utilizes temperature sensor in calorimeter 152 and flow sensor to obtain and data on flows.Computing method adopt k-factor penalty method, and it possesses debugging functions, thus has higher precision, and meeting the international code of OIML-R75 and EN1434 European standard, is the state-of-the-art computing method of current computational accuracy.The computing formula of k-factor penalty method is utilized to be:
Q = ∫ 0 v 1 k · Δ θ · d V
Wherein, the release heat of tested battery 2 of Q for obtaining, unit is KJ (kilojoule) or kWh (kilowatt hour); K is heat exchange coefficient, and unit is kWh/m 3dEG C; Δ θ is the import and export temperature difference of calorimeter 152, and unit is DEG C (degree Celsius); V is volumetric flow rate, and unit is m 3(cubic meter), v 1for the volumetric flow rate in whole measuring process.
When calculating, heat exchange coefficient is:
k=(h f-h r)/(θ fr)/v
Wherein, h f, h rbe respectively the enthalpy of the heat transport fluid under the entrance and exit of calorimeter 152; θ f, θ rbe respectively inlet temperature and the outlet temperature of calorimeter 152; V is specific volumetric flow rate, and its value and import and export enthalpy can be tried to achieve with reference to the detailed description in the international code of OIML-R75 and EN1434 European standard.
Above-mentioned formula is also the principle formula of the embodiment of the present invention.
The embodiment of the present invention provides the method for a kind of cell heat test simultaneously, and the method adopts the cell heat proving installation of above-described embodiment, and as shown in Figure 4, it mainly comprises the following steps:
Step 1, tested battery inserted in thermal-insulating chamber between water tank group, and the lug of tested battery is electrically connected on Electrode connection port;
Step 2, outside charging/discharging apparatus is connected to described Electrode connection port;
Step 3, all parts being positioned at described constant temperature oven carry out initial temperature balance;
Step 4, temperature information by each temperature sensor of computer real-time monitoring;
Step 5, after the temperature information of each temperature sensor all reaches initial temperature and be stable, store by computer real-time monitoring the temperature information and flow information that described calorimeter obtains;
Step 6, open described water pump to drive the circulation of the cooling medium in described circulation line;
Step 7, open outside charging/discharging apparatus to carry out discharge and recharge to described tested battery;
Step 8, to terminate when discharge and recharge, and the temperature information of each temperature sensor all get back to initial temperature and maintain the heat accumulative value of a period of time and/or calorimeter invariable time, stop test;
Step 9, the heat that the heat accumulative value of calorimeter is discharged in charge and discharge process as tested battery.
More subsidiary ingredient is had in the cell heat proving installation of above-described embodiment, these ingredients are mainly used in helping before carrying out the measurements to be consistent with the temperature in constant temperature oven in thermal-insulating chamber, in conjunction with the calorimetry process of whole tested battery, in embodiment of the method for the present invention, more comprise following careful step.
Step a, tested battery to be inserted between lower header in thermal-insulating chamber and upper water box, and lug intermediate plate is held on lug;
Step b, by the leader cable of charging/discharging apparatus to Electrode connection port;
Step c, all parts being positioned at constant temperature oven are all exposed to constant temperature oven, and it carries out initial temperature balance, process-exposed comprises the thermal-insulating chamber lid being opened thermal-insulating chamber by computing machine control opening and closing motor, the initial temperature of constant temperature oven is set to normal temperature (20 DEG C), or other temperature, such as, arbitrary temperature between-20 DEG C ~ 30 DEG C, be preferably normal temperature, by the temperature information of computer monitoring temperature sensor, ensure that the temperature information of all temperature sensors all equals initial temperature and maintaining heat balance;
Steps d, after the temperature information of all temperature sensors all reaches initial temperature and be stable, control opening and closing motor close thermal-insulating chamber lid by computing machine, adjustment upper water box bottom surface is to the pressure of tested battery, and its force value is gathered by pressure transducer;
Step e, unlatching water pump make cooling medium cyclically successively through upper water box, water pump, calorimeter, heating radiator, calorimeter, lower header, upper water box, and period utilizes real-time monitoring of computer and gathers temperature and the calorie value of each point;
Open charging/discharging apparatus and discharge and recharge is carried out to battery;
Step f, when discharge and recharge terminate and the temperature of each temperature sensor get back to initial temperature and maintain the accumulative calorie value of a period of time and/or calorimeter invariable time, stop test, read the heat accumulative value of calorimeter or namely obtain accumulative calorie value by computing machine be the heat discharged in this tested battery charge and discharge process recorded.
Cell heat proving installation of the present invention and cell heat method of testing can effectively and exactly measure the heat sent when tested battery carries out discharge and recharge, and then for know battery or power brick heating situation, carry out heat management effectively, and then effectively improve the thermal safety of lithium ion battery used for electric vehicle, provide first-hand authentic communication, the heat management of electric automobile and thermal safety are had great importance.
Be to be understood that, although this instructions describes according to each embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
A series of detailed description listed is above only illustrating for feasibility embodiment of the present invention; and and be not used to limit the scope of the invention; allly do not depart from the skill of the present invention equivalent embodiments done of spirit or change; as the combination of feature, segmentation or repetition, all should be included within protection scope of the present invention.

Claims (10)

1. a cell heat proving installation (1), is characterized in that, comprising:
Constant temperature oven (11);
Thermal-insulating chamber (12), described thermal-insulating chamber (12) is positioned at described constant temperature oven (11);
Water tank group (13), the interior filling liquid cooling medium of described water tank group (13), and clamping tested battery (2), described water tank group (13) is placed in described thermal-insulating chamber (12) together with described tested battery (2);
Water pipe group (14), described water pipe group (14) is positioned at constant temperature oven (11), described water pipe group (14) is by water tank group (13), water pump (151), calorimeter (152), heating radiator (153) is communicated with, formed by described water tank group (13) through described water pump (151) to described calorimeter (152), described calorimeter (152) is returned to described heating radiator (153) by described heating radiator (153) again by described calorimeter (152), again by the circulation line of described calorimeter (152) to described water tank group (13), described cooling medium is circulated in described circulation line,
Water pump (151), described water pump (151) is positioned at constant temperature oven (11), and is positioned at beyond described thermal-insulating chamber (12), for driving the circulation of the liquid coolant in described circulation line;
Calorimeter (152), described calorimeter (152) is positioned at constant temperature oven (11), and be positioned at beyond described thermal-insulating chamber (12), for obtaining the heat accumulative value flowing through the liquid coolant of this calorimeter (152);
Heating radiator (153), described heating radiator (153) is positioned at constant temperature oven (11), and be positioned at beyond described thermal-insulating chamber (12), for heat entrained in the cooling medium flowing through this heating radiator (153) is distributed in constant temperature oven (11);
At least one temperature sensor (161), is arranged in described tested battery (2) surface, for obtaining the temperature information on described tested battery (2) surface;
Electrode connection port (17), described Electrode connection port (17) is positioned at described thermal-insulating chamber (12) and be electrically connected on the lug (21) of described tested battery (2) outward, and described Electrode connection port (17) is for connecting outside charging/discharging apparatus;
Computing machine (19), described computing machine (19) is positioned at described constant temperature oven (11) outward, and be connected to described calorimeter (152) and at least one temperature sensor (161), described computing machine (19) for receive described at least one temperature sensor (161) and obtain temperature information, receive the heat accumulative value that described calorimeter (152) obtains.
2. cell heat proving installation (1) according to claim 1, is characterized in that, described cell heat proving installation (1) also comprises:
Pressure transducer (162), described pressure transducer (162) is positioned at described thermal-insulating chamber (12) and is connected to described computing machine (19), and described pressure transducer (162) puts on the pressure information of described tested battery (2) for obtaining described water tank group (13) and sends it to described computing machine (19) and monitor.
3. cell heat proving installation (1) according to claim 1, is characterized in that, described cell heat proving installation (1) also comprises:
Electrode heat conduction connector (171), described electrode heat conduction connector (171) is positioned at described thermal-insulating chamber (12), one end of described electrode heat conduction connector (171) is connected to the lug (21) of described tested battery (2), the other end of described electrode heat conduction connector (171) is as described Electrode connection port (17), described electrode heat conduction connector (171) surface coverage heat conductive insulating silica gel, described water tank group (13) is pressed in described heat conductive insulating silica gel.
4. cell heat proving installation (1) according to claim 1, is characterized in that:
Described water tank group (13) comprises lower header (131) and upper water box (132); Wherein,
Described lower header (131) is positioned at the downside of described tested battery (2), described upper water box (132) is positioned at the upside of described tested battery (2), and described tested battery (2) is positioned between described lower header (131) and upper water box (132);
By a soft pipe connection between described lower header (131) and upper water box (132), the liquid coolant in described lower header (131) is made to enter described upper water box (132) by described flexible pipe;
Water inlet offered by described lower header (131), to connect described water pipe group (14), makes the liquid coolant in described water pipe group (14) flow to described lower header (131) by described water inlet;
Described upper water box (132) sets out the mouth of a river, to connect described water pipe group (14), makes the liquid coolant in described upper water box (132) flow out described upper water box (132) by described water delivering orifice.
5. cell heat proving installation (1) according to claim 4, is characterized in that:
Described thermal-insulating chamber (12) offers and described water inlet and the suitable through hole of water delivering orifice, with make to be positioned at the water tank group (13) of thermal-insulating chamber (12) and be positioned at thermal-insulating chamber (12) water pump outward (151), calorimeter (152), heating radiator (153) be communicated with by described water pipe group (14).
6. cell heat proving installation (1) according to claim 4, is characterized in that, described water pipe group (14) comprising:
Rising pipe (141), described rising pipe (141) is connected between the water delivering orifice of described upper water box (132) and the water inlet of described water pump (151);
First mozzle (142), described first mozzle (142) is connected between the water delivering orifice of described water pump (151) and the water inlet of calorimeter (152);
Second mozzle (143), described second mozzle (143) is connected between the heat radiation water delivery nozzle of described calorimeter (152) and the water inlet of heating radiator (153);
3rd mozzle (144), described 3rd mozzle (144) is connected between the water delivering orifice of heating radiator (153) and the heat radiation water return outlet of described calorimeter (152);
Water inlet pipe (145), described water inlet pipe (145) is connected between the water delivering orifice of described calorimeter (152) and the water inlet of described lower header (131).
7. cell heat proving installation (1) according to claim 1, is characterized in that:
Described at least one temperature sensor (161) is arranged in described tested battery (2) surface, the lug (21) of tested battery (2), upper water box (132) and in lower header (131) respectively, and be connected to described computing machine (19), to obtain described tested battery (2) surface temperature information, lug (21) temperature information of tested battery (2), upper water box (132) interior temperature information and lower header (131) interior temperature information, and obtained temperature information is sent to described computing machine (19).
8. cell heat proving installation (1) according to claim 1, is characterized in that:
Described thermal-insulating chamber (12) comprises thermal-insulating chamber body (121) and thermal-insulating chamber lid (122); Wherein,
Described thermal-insulating chamber body (121) inside forms the spatial accommodation of a upper opening, and described water tank group (13) is placed in described spatial accommodation together with described tested battery (2);
Described thermal-insulating chamber lid (122) is arranged at the top of described thermal-insulating chamber body (121), and under the control of an opening and closing motor (125), open, close the opening of described spatial accommodation, wherein, described opening and closing motor (125) is electrically connected on described computing machine (19), to perform the opening of described thermal-insulating chamber lid (122), shutoff operation under the control of described computing machine (19).
9. cell heat proving installation (1) according to claim 1, is characterized in that:
Described thermal-insulating chamber (12) offers and vacuumizes interface (18).
10. adopt the cell heat proving installation (1) as described in any one of claim 1 to 9 to carry out a method for cell heat test, comprising:
Tested battery (2) is inserted between the water tank group (13) in thermal-insulating chamber (12), and the lug (21) of tested battery (2) is electrically connected on Electrode connection port (17);
Outside charging/discharging apparatus is connected to described Electrode connection port (17);
The all parts being positioned at described constant temperature oven (11) carry out initial temperature balance;
By the temperature information of each temperature sensor of computing machine (19) Real-Time Monitoring (161);
After the temperature information of each temperature sensor (161) all reaches initial temperature and be stable, store by computing machine (19) Real-Time Monitoring the temperature information and flow information that described calorimeter (152) obtains;
Open described water pump (151) to drive the circulation of the cooling medium in described circulation line;
Open outside charging/discharging apparatus to carry out discharge and recharge to described tested battery (2);
When discharge and recharge terminates, and the temperature information of each temperature sensor (161) all get back to initial temperature and maintain the heat accumulative value of a period of time and/or calorimeter (152) invariable time, stop test;
Using the heat that the heat accumulative value of calorimeter (152) discharges in charge and discharge process as tested battery (2).
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