CN217606041U - Intelligent explosion-proof constant-temperature battery test box - Google Patents

Abstract

The utility model provides an explosion-proof constant temperature battery test box of intelligence, include: the box body is provided with an explosion-proof protective door and is internally provided with a supporting plate; the battery clamps are arranged on the supporting plate and used for fixing a plurality of groups of batteries to be tested; the constant temperature device is arranged in the box body and is used for keeping the test temperature in the box body constant; the safety device comprises a flame detector arranged inside the box body and a fire extinguishing device arranged outside the box body and is used for safety protection of the test; and the control device is arranged outside the box body, is respectively electrically connected with the constant temperature device, the safety device and the power supply and is used for regulating and controlling the test temperature. The utility model provides an explosion-proof constant temperature battery test box of intelligence for battery test has advantages such as simple structure, easy operation, small, the energy consumption is low, the low price, the stability in use is good, the temperature control scope is big, the accuse temperature is accurate.

Description

Intelligent explosion-proof constant-temperature battery test box

Technical Field

The utility model relates to a power battery tests technical field, specifically relates to an explosion-proof constant temperature battery test box of intelligence.

Background

Batteries are being widely used in various industries as a new type of energy supply equipment, and the demand is increasing. With the increase of the number of used batteries, the problem of battery safety is urgently needed to be solved.

Generally, the safety problem of the battery is manifested as burning or even explosion, and the root of the problem lies in thermal runaway inside the battery, higher temperature of the external environment and heat generated by the battery itself, which may cause the internal temperature of the battery to rise, accelerate the side reaction of the battery, cause the performance degradation of the battery, seriously affect the service life and safety of the battery and even cause explosion.

At present, in domestic colleges and universities, scientific research institutions and lithium battery companies, when various types of batteries, particularly lithium batteries, are subjected to cycle test, a battery test system mainly comprises charge and discharge testers of brands such as blue electricity, xinwei and the like; in the test, need use more test channel, the battery is directly exposed in test room or laboratory in the test process moreover, because frequently opening the door and test space is great, is difficult to guarantee constant temperature test environment, and then seriously influences the reliability and the stability of test data.

In order to solve the problem of exposure test, some existing laboratories can place test batteries in a common constant-temperature oven, but the common constant-temperature oven is not used for testing the batteries, a device for fixing the batteries is not specially designed, the test batteries are stacked together in the oven in a disorderly manner, so that the problems of local thermal runaway and the like of the batteries are caused, and danger is caused, and meanwhile, an operator also wants to be inconvenient to use. In addition, in order to improve the quality of the battery, the performance of the battery needs to be tested when the battery is produced, a special battery test box is urgently needed in order to prevent the battery from exploding to hurt workers and the environment in the test process, and the problems that the structural design in the box is unreasonable, the performance is poor, the function is single and various requirements in industrial production cannot be met in the existing equipment are solved.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem that the above-mentioned provided, the utility model provides an explosion-proof constant temperature battery test box of intelligence for battery test has advantages such as simple structure, easy operation, small, the energy consumption is low, low price, stability in use is good, the temperature control scope is big, the temperature control is accurate.

The utility model provides an explosion-proof constant temperature battery test box of intelligence, include: the box body is provided with an explosion-proof protective door and is internally provided with a supporting plate; the battery clamps are arranged on the supporting plate and used for fixing a plurality of groups of batteries to be tested; the constant temperature device is arranged in the box body and is used for keeping the test temperature in the box body constant; the safety device comprises a flame detector arranged inside the box body and a fire extinguishing device arranged outside the box body and is used for safety protection of the test; and the control device is arranged outside the box body, is respectively electrically connected with the constant temperature device, the safety device and the power supply and is used for regulating and controlling the test temperature.

Furthermore, the constant temperature device comprises a temperature sensor arranged at the center inside the box body, a radiator arranged on the rear wall inside the box body and a refrigerator arranged at the top inside the box body, and the temperature sensor, the radiator and the refrigerator are respectively connected with the control device.

Furthermore, the refrigerator is a thermoelectric semiconductor refrigeration assembly, can perform heating or refrigeration operation, and has a temperature range of-20-80 ℃.

Furthermore, the fire extinguishing device is provided with a fire extinguisher, a fire extinguishing switch and a nozzle; wherein, the nozzle is connected with the fire extinguisher through a pipeline; the fire extinguishing switch is respectively connected with the fire extinguisher and the control device; the nozzle is arranged inside the box body.

Furthermore, the flame detector adopts a photosensitive near-infrared flame detector and is connected with the control device.

Furthermore, the battery clamp is provided with a test clamping point for connecting a battery to be tested; a test lead is fixed on the supporting plate; one end of the test lead is connected with the test clamping point, and the other end of the test lead penetrates through the rear wall of the box body and is electrically connected with the intelligent battery testing device.

Further, still include dehydrating unit, set up inside the box, set up many places, with controlling means electric connection for the inside humidity of regulation and control box.

Furthermore, the box body is a double-layer explosion-proof box body or a multi-layer explosion-proof box body with an interlayer, and a heat preservation unit is arranged in the interlayer.

Furthermore, the middle part of the protective door is provided with an explosion-proof window, and the periphery of the interior of the protective door is provided with a sealing element.

Furthermore, a power supply is also arranged and arranged outside the box body and is electrically connected with the control device through a main switch.

By adopting the technical scheme of the utility model, the constant temperature test box does not need any refrigerant, can continuously work, has no pollution source, has no vibration and noise during working, has long service life and is easy to install; the semiconductor refrigerating assembly has two functions of refrigerating and heating, so that a heating system and a refrigerating system which are separated can be replaced by one part; meanwhile, the semiconductor refrigeration component is a current transduction type part, and high-precision temperature control can be realized through control of input current; the semiconductor refrigerating assembly has very small thermal inertia, the refrigerating and heating time is fast, and the refrigerating sheet can reach the maximum temperature difference when the power is on for less than one minute under the conditions that the heat dissipation of the hot end is good and the cold end is in no load; the bottom of the constant temperature test box is provided with a leakage-proof groove with the height of 50mm, so that the combustible liquid chemicals are prevented from overflowing; the constant temperature test box is also provided with an electrostatic grounding wire to prevent the cabinet body from generating electrostatic sparks, thereby increasing the use safety.

It should be understood that what is described in this summary section is not intended to limit key or critical features of embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of various embodiments of the present invention will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:

fig. 1 is a block diagram of a structure of an intelligent battery testing device according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the external structure of a constant temperature test chamber of an embodiment of the present disclosure;

FIG. 3 is a schematic view of the internal top structure of the isothermal testing chamber of an embodiment of the present disclosure;

FIG. 4 is a block diagram of a fire suppression apparatus of a constant temperature test chamber of an embodiment of the present disclosure;

FIG. 5 is a flow chart of the operation of a fire suppression device of the constant temperature test chamber of the embodiment of the present disclosure;

fig. 6 is a battery test workflow diagram of a battery test apparatus of an embodiment of the present disclosure;

fig. 7 is a battery capacity test workflow diagram of the battery test apparatus of the embodiment of the present disclosure;

wherein, the corresponding relationship between the reference numbers and the part names in fig. 1-7 is:

the device comprises a box body 1, a protective door 2, a control device 3, a dehumidifying device 4, a power supply 5, a lighting device 6, a temperature sensor 7, a radiator 8, a refrigerator 9, a fire extinguisher 10, a fire extinguishing switch 11, a pipeline 12, an explosion-proof window 13 and a handle 14.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In addition, the term "and/or" herein is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The utility model provides an explosion-proof constant temperature battery test box of intelligence is applied to the intelligent battery test system of electric power prison device of clapping, provides a safe test environment for the battery that awaits measuring. The intelligent battery testing system comprises an intelligent battery testing device, a constant temperature testing box and a battery monitoring system.

[ Intelligent Battery testing device ]

As shown in fig. 1, the intelligent battery testing device includes a power supply module, an AC/DC rectification module, a current bus, a multi-way switch module, a charging module, a discharging module, a controller, an electronic load, an energy storage module, a sampling module, a communication module, and an upper computer display module. The output end of the power supply module is connected with the AC/DC rectification module, the output end of the AC/DC rectification module is connected with a current bus, and the current bus is connected with the multi-way switch module; the multi-way switch module is connected with a plurality of groups of charging modules and discharging modules, and each group of charging module and each group of discharging module are correspondingly connected with a battery to be tested; the controller is connected with the multi-way switch module, the charging module and the discharging module; the multi-way switch module is connected with the electronic load; the multi-way switch module is connected with the energy storage module; the energy storage module, the electronic load and the battery to be tested are all connected to the sampling module; the sampling module is connected with the communication module; the communication module is connected with the upper computer display module.

Wherein the content of the first and second substances,

a power supply module: the unidirectional direct current of 110-220V is accessed and input into the AC/DC rectification module for supplying power to the whole system device.

AC/DC rectification module: the AC/DC converter is a voltage type rectifier, and the pulse width modulation signal for controlling the AC/DC converter is generated by adopting the most widely applied voltage and current double closed loop control mode and the space vector pulse width modulation algorithm at present, so that the rectification of a power supply module and the stability of direct current voltage measurement are realized; the output end of the AC/DC rectification module supplies power to the charging module and the discharging module by being connected with a current bus.

Current bus: the power supply module supplies power and is respectively connected with the charging module, the discharging module, the electronic load and the energy storage module, and corresponding current is distributed to each module to play a role in overall control. The charging system is internally provided with a multi-way switch module, an acquisition module, a communication module, a controller and a display module, test data of different charging test modes are preset, and current, voltage and power are regulated and distributed according to the different test modes. The current bus is provided with a proper interface circuit, and the bus standard is established to be connected with each module, so that the expansion of the modules is facilitated, and the flexibility of the test is increased.

Specifically, the current bus distributes the current and voltage according to the pre-stored data requirements of the current and voltage of different charging tests, and can regulate and control different current and voltages in different stages according to requirements, such as the data requirements of the segmented current and voltage of different test modes, the expansion requirements of different numbers of test modules, and the like. The master control function of the current bus is matched with the module expansion function of the current bus, so that the test of different modes of a plurality of groups of batteries can be well realized.

The multi-way switch module: the charging module and the discharging module are respectively connected and used for switching on and off of charging and discharging tests of each group of batteries to be tested and switching between charging and discharging states of each group; specifically, a multi-path state switching module is arranged; the multi-path state switching module adopts a relay to connect the charging module, the discharging module, the electronic load and the energy storage module of each single-path test, so that the output and the input of each path are not influenced by each other and operate independently, and the on-off of each path is realized.

A charging module: the DC/DC converter is used for receiving the regulation and control of the current bus, switching on the battery to be tested for charging test, generating a PWM signal by adopting a double-phase-shifting control mode, converting the DC voltage distributed by the current bus into the voltage meeting the requirement of the battery to be tested, charging the battery to be tested and carrying out the charging test.

A discharging module: the method comprises the steps of receiving the regulation and control of a current bus, switching on a battery to be tested for discharge test, generating a PWM signal by adopting a double-phase-shifting control mode inside the battery to be tested, converting direct-current voltage distributed by the current bus into voltage meeting the requirement of the battery to be tested, discharging the battery to be tested, and performing discharge test. When the independent discharge test is carried out, the electronic load is switched on to carry out the independent discharge test, and when the simultaneous charge and discharge test is carried out, the discharge capacity is redistributed at the current bus and distributed to the charging module which needs to be subjected to the charge test at the moment to carry out the charge test, so that the simultaneous charge and discharge test is realized. The discharging module is connected with the battery to be tested, discharging amount flows through the current bus, other groups of batteries to be tested are charged through the charging module, surplus electric quantity can be stored in the energy storage module, the discharging amount is fully utilized, and waste is avoided.

A controller: the multi-channel switch module is used for controlling the working states of the charging module and the discharging module, controlling the conducting state of each channel of the multi-channel switch module, and controlling the parameters, the discharging current, the cut-off voltage and the like of the electronic load during the discharging test.

Electronic load: the battery to be tested is used as a power supply to test the discharge performance of the battery to be tested; a plurality of electronic loads are arranged to form a multi-path test with a current bus, the load value of each path is accurately controlled through the current bus, and the independent discharge test of a plurality of groups of batteries to be tested is carried out, so that different discharge tests of constant current, constant voltage and constant resistance are realized; and simultaneously storing the discharge capacity of the battery to be tested through the current bus.

An energy storage module: the multi-way switch module is connected with the current bus, when the discharge test of a plurality of groups of batteries to be tested is carried out, the discharge capacity is temporarily stored, if the charge test is carried out at the moment, the current bus distributes the redundant electric quantity to the charging module for the charge test, and the simultaneous charge and discharge test is realized; if the charging test is not carried out at the moment, the discharging capacity is temporarily stored, the loss of electric quantity is prevented, and the low-carbon and environment-friendly effects are achieved.

Specifically, the energy storage module selects a super capacitor and is connected with the current bus through an interface, and module expansion with different capacities and different quantities can be performed according to needs so as to meet the needs of different test scenes. The energy of the electric double layer capacitor is stored in the form of electric charges at the contact surface. During charging, electrons flow from the positive electrode to the negative electrode, and positive and negative ions in the electrolyte are separated and respectively move to the surface of the contact surface to form an electric double layer; after the charging is finished, the electric double layer is stabilized due to the principle that charges are opposite in attraction, namely the voltage of the super capacitor is stabilized. During discharge, electrons flow from the negative electrode to the positive electrode, creating a current in the external circuit, which in turn neutralizes the positive and negative ions in the electrolyte.

A sampling module: and collecting test parameters such as voltage, current and temperature of the battery to be tested, the electronic load and the energy storage module. The acquisition of the voltage in the test device is direct current voltage, and a direct current voltage acquisition method with isolation is used for the acquisition. The direct current signal of the battery is isolated from the electric signal by the optocoupler, and the measurement switch of the signal is controlled by the optocoupler relay. The isolation method can protect the input end from being interfered by other signals. Because the voltage of a testing battery pack in the communication power supply is large, signals need to be adjusted to voltage signals capable of being subjected to A/D conversion by a single chip microcomputer, the voltage output by the optical coupling relay needs to be processed through an operational amplifier, and the processed signals are transmitted to a sampling module, so that the acquisition and monitoring of direct-current voltage are completed. In the charging and discharging process of a battery to be detected, not only voltage but also current need to be collected in real time, the current of the battery pack is detected by adopting a high-precision Hall sensor, and I/V conversion is not needed by the current sensor. In order to accurately reflect the temperature distribution condition of the battery pack to be tested and accurately master the temperature change condition of the battery pack in the charging process, the temperature of the battery is collected by adopting the temperature sensor, and the temperature collection design has up to 10 temperature sensor interfaces, so that the temperature collection requirement of the battery pack to be tested can be well met.

A communication module: the method comprises Ethernet communication and RS-485 serial port communication, and communication among modules is realized.

The upper computer display module: the test data and real-time data curve display device is used for inputting test data and displaying the test data and the real-time data curve of a plurality of groups of batteries to be tested in real time. And the information such as detection data, state and the like of the multi-channel batteries to be detected can be displayed in real time at the same time. And the working personnel carries out artificial regulation and control of the charge and discharge test according to the data display condition.

[ CONSTANT-TEMPERATURE TEST BOX ]

The utility model discloses an intelligent battery testing device, aiming at the difficult problems of large volume, large energy consumption, high cost, inaccurate temperature control, small temperature control range and the like of the temperature control system of the current battery charging and discharging test on the temperature control, the intelligent battery testing device is also provided with a constant temperature testing box for the battery charging and discharging test, and has the advantages of simple structure, easy operation, small volume, low energy consumption, low price, good use stability, large temperature control range, accurate temperature control and the like; the device can provide an independent working environment interval of the battery to be tested, has perfect air flow organization, enables the battery to be tested in the box to work in the optimal temperature all the time, and improves the service life of the battery to be tested and the safety of the test.

Constant temperature test box: as shown in fig. 2-3, the carrier serving as a battery to be tested comprises a box body 1, a protective door 2, a thermostatic device, a safety device, a battery clamp, a control device 3, a dehumidifying device 4, a power supply 5 and an illuminating device 6; wherein, a constant temperature device and a battery clamp are arranged inside the box body 1; the control device 3 is connected with the constant temperature device and the power supply 5 at the same time, so that the regulation and control of temperature rise and temperature reduction are realized;

in particular, the method comprises the following steps of,

a box body 1: the front side of the exterior is provided with an openable explosion-proof protection door 2.

A constant temperature device: the temperature control device is arranged in the box body 1 and is used for keeping the test temperature in the box body 1 constant; the temperature control device comprises a temperature sensor 7 arranged at the center inside the box body 1, a radiator 8 arranged on the rear wall inside the box body 1 and a refrigerator 9 arranged at the top inside the box body 1, and the temperature sensor 7, the radiator 8 and the refrigerator are respectively connected with the control device 3.

The temperature sensor 7 is arranged at the central position inside the box body 1 and is connected with the control device 3 outside the box body through a wire hole at the top of the box body 1 so as to monitor the temperature inside the box body 1 and realize the monitoring transmission of temperature rise and temperature reduction.

The refrigerator 9 is a thermoelectric semiconductor refrigeration assembly, is fixed at the top inside the box body 1 and can perform heating or refrigeration operation. The thermoelectric semiconductor refrigeration component is provided with a plurality of radiating fins which are embedded on two sides of the top inside the box body 1, and the temperature inside the box body can be controlled to be-20-80 ℃ by changing the quantity and power of the radiating fins of the thermoelectric semiconductor refrigeration component and setting the preset test temperature of the control device 3. Under the condition of electrifying, the polar plates at the two ends can generate a certain temperature difference, a low-temperature environment can be provided for an object by utilizing the condensation surface of the polar plates, and the heating surface provides heat source energy.

The radiator 8 adopts a 12V,0.32A direct current radiator fan, is fixed at the rear side of the box body 1 close to the thermoelectric semiconductor refrigerating assembly, is opened and controlled by the control device 3, and when the temperature of the box body 1 is out of a set temperature range, the radiator fan runs to transmit the heat or cold air of the thermoelectric semiconductor refrigerating assembly to the box body 1, so that the temperature distribution is uniform.

A safety device: the device comprises a flame detector and a smoke alarm which are arranged inside a box body 1, a fire extinguishing device arranged outside the box body 1 and a leakage-proof groove arranged at the bottom of the box body, and is used for safety protection of testing.

The flame detector adopts a photosensitive near-infrared flame detector, is connected with a fire extinguishing module in the control device 3, transmits test data in the test box to the control device 3, and starts the fire extinguishing device by comparing with fire extinguishing parameters preset in the fire extinguishing module. The photosensitive near-infrared flame detector is selected as a battery fire detector, and has the characteristics of sensitivity to infrared radiation, high response speed, adjustable sensitivity, high anti-interference capability and the like.

The smoke alarm is used for detecting whether fire hazard exists or not, detecting the heating and burning of the storage battery in time and giving an alarm, and transmitting monitoring data to the fire extinguishing module in the control device 3 at any time; and the flame detector is matched with the flame detector for use, so that the safety performance of the flame detector is more reliable and accurate.

The fire extinguishing device is provided with a fire extinguisher 10, a fire extinguishing switch 11 and a nozzle arranged inside the box body 1, as shown in figure 4; the fire extinguisher 10 is connected with the nozzle through a pipeline 12; the fire extinguishing switch 11 is automatically controlled by a fire extinguishing module in the control device 3, and the fire extinguisher 10 is started to extinguish fire;

wherein, the fire extinguisher 10 adopts a heptafluoropropane fire extinguishing agent bottle; the fire extinguishing switch 11 adopts an electromagnetic container valve. When the lithium battery is tested to explode and burn, the flame detector transmits a signal to the fire extinguishing module, the fire extinguishing module drives the electromagnetic container valve to open, so that the heptafluoropropane fire extinguishing agent flows out of the pipeline 12 of the fire extinguisher 10, the pipeline 12 is connected with one end of the steel pipe, the other end of the steel pipe is connected with the nozzle, the heptafluoropropane fire extinguishing agent is sprayed into the test box through the steel pipe and the nozzle, and the fire is extinguished, wherein the specific fire extinguishing process is shown in figure 5.

The bottom of the safety device is also provided with a leakage-proof groove which can prevent the overflow of dangerous liquid in the fire extinguishing process, such as combustible liquid chemicals and heptafluoropropane fire extinguishing agent in the combustion process, and avoid polluting the environment.

The control device 3: the temperature control device is arranged outside the box body 1, is respectively and electrically connected with the constant temperature device, the safety device and the power supply 5, and is used for regulating and controlling the test temperature; wherein, a temperature control module and a fire extinguishing module are arranged for respectively controlling the temperature and the fire extinguishing.

A plurality of battery clamps: the battery testing device is arranged in the box body 1 and used for fixing a plurality of groups of batteries to be tested and ensuring that the batteries to be tested are electrically connected with the battery testing device outside the box body 1. The box 1 is internally provided with a supporting plate in a layered mode, and a plurality of rows of battery clamps are sequentially arranged on each layer of supporting plate according to the size of the test battery. The supporting plate is movably arranged in the box body 1, and the supporting plate installation with different specifications and quantities is carried out according to different batteries.

The battery clamp is provided with a test clamping point and is used for connecting a battery to be tested; the test wire is fixed on the supporting plate, one end of the test wire is connected with the test clamping point, and the other end of the test wire penetrates through the rear wall of the box body 1 and is electrically connected with the intelligent battery testing device. And a contact part of the battery clamp and the supporting plate is provided with a test wire hole for testing the connection of a wire and a test clamping point. The test lead can be arranged in the supporting plate or fixed on the surface of the supporting plate.

Specifically, the built-in wire is arranged on a support plate of the battery clamp in the test wire, one end of the built-in wire is connected with a test clamping point of the battery clamp, and the other end of the built-in wire is provided with a connector connected with the intelligent battery testing device. The design of the built-in lead saves the space inside the test box body 1 and prevents the danger caused by the disordered placement of the test lead, and the intelligent battery test device outside the test box can not be damaged due to the ignition of the test lead when a fire disaster happens due to the built-in lead; the battery clamp is provided with the specific test clamping points, so that the battery to be tested can be quickly placed to be connected with electricity, and the fire caused by poor contact in the charging and discharging process is avoided. The intelligent battery testing device and the battery to be tested are connected through the testing wire and are separately arranged, so that the size of the testing box body 1 is reduced, the temperature in the box body 1 is controlled more accurately and rapidly, and the corresponding cost is lower.

Specifically, a part of the built-in wire is fixed inside the supporting plate, a reserved testing wire with a certain length is reserved outside the supporting plate, and the other end of the testing wire is provided with a connector connected with the intelligent battery testing device. When the supporting plate is replaced, the reserved test lead outside the supporting plate penetrates through the lead hole in the rear wall of the box body 1 and is inserted into the intelligent battery testing device to test the battery.

Specifically, the wall is equipped with the wire guide of a certain amount behind box 1 to set up the heat preservation stopper in the hole, when not using, play and keep the inside temperature and humidity of box 1 invariable, do not receive the effect of external influence. When the wire guide hole is used, the heat preservation plug is taken away.

It is specific, be equipped with slidable heat preservation ring on reserving the test wire, the size of heat preservation ring is the same with the wire guide of box 1 back wall, when reserving the test wire and passing the wire guide, take away the heat preservation stopper, will reserve the test wire and pass, fill in the wire guide with the heat preservation ring, firstly, the fixed position of reserving the test wire, prevent that the operation outside the case from causing the damage of test wire to dragging of test wire, secondly, live with wire guide is sealed, keep the temperature humidity of 1 inside of box invariable, do not receive external influence. Specifically, backup pad, test wire crust, heat preservation ring and heat preservation stopper all adopt fire-retardant high temperature resistant material, increase holistic factor of safety, when also having prevented the incasement to catch fire, can not arouse the impaired of the intelligent battery testing arrangement who is connected with it. The dehumidifying device 4: the setting is inside box 1, sets up the multiple department, with controlling means 3 electric connection for the inside humidity of regulation and control box 1. When the temperature of the box body 1 is set to be lower, the humidity is controlled, the damp air is pumped into the machine by the fan and passes through the heat exchanger, water molecules in the air are condensed into water drops, and the treated dry air is discharged out of the machine to prevent the humidity.

The power supply 5: the thermoelectric semiconductor refrigerating assembly is arranged outside the box body 1 and is electrically connected with the control device 3 through the main switch, and power is supplied to the control device 3, the thermoelectric semiconductor refrigerating assembly and the cooling fan. The power supply 5 is an alternating current power supply or a direct current constant voltage power supply.

The lighting device 6: the setting is at the inside top of box 1, with controlling means 3 electric connection, is convenient for observe in 1 to the box through explosion-proof window 13 on the guard gate 2, increases the security.

The control device 3: the box body power supply is arranged outside the box body 1, is respectively and electrically connected with the constant temperature device, the safety device, the dehumidifying device 4, the box body power supply 5 and the illuminating device 6, and is used for regulating and controlling the test temperature in the box body and starting and stopping and illuminating equipment; wherein a temperature control module, a fire extinguishing module and a safety module are arranged.

Specifically, the temperature control module controls the constant temperature device and the dehumidifying device to regulate and control the temperature and humidity ranges in the box body according to preset temperatures and humidity corresponding to different batteries;

specifically, the fire extinguishing module controls the safety device and the box body power supply 5, starts the fire extinguishing device and gives an alarm according to preset fire extinguishing parameters, and simultaneously performs power failure control;

specifically, the safety module controls the box power supply 5 to perform power-off processing under the conditions of alarm and fire hazard; still carry out electric connection with intelligent battery testing arrangement's power module, under the condition that has warning and conflagration danger, control power module's outage stops the test operation of charging and discharging.

The test box of this scheme adoption reaches explosion-proof heat preservation effect through setting up 1 shell of special box, and guard gate 2 passes through the hinge to be connected with box 1, and 2 middle parts of guard gate are equipped with explosion-proof window 13, for the toughened glass window, and 2 inside peripheries of guard gate are equipped with the sealing member.

Specifically, the box body 1 is a double-layer explosion-proof box body or a multi-layer explosion-proof box body with an interlayer, wherein a heat preservation unit is arranged in the interlayer, and the heat preservation unit is made of rock wool; the box body 1 is supposed to select refractory bricks, Q420 steel and reinforced concrete as the materials of the test box. Analyzing that the lithium ion battery generates thousands of high temperatures in the combustion process by combining the combustion characteristics of the lithium ion battery, and the cabinet wall of iron or stainless steel materials is likely to be melted or softened; the shock wave generated when the lithium ion battery explodes can damage the box wall. Therefore, the high-aluminum heat-insulation light-weight refractory brick is selected, the fire endurance is not lower than 4h, a layer of Q420 steel is lined outside, and rock wool is filled between the steel plate and the heat-resistant brick. Rock wool can effectively weaken the damage of explosion shock waves to the steel plate, and can also effectively reduce the conduction of high combustion temperature to the steel plate. The test box body has the capability of resisting explosion shock waves, can limit the destructive effect of explosion within a certain range, and adopts a stainless steel plate to mainly have the function of an explosion-proof wall. According to the capacity of the lithium ion battery to be tested, the TNT equivalent can be calculated, and the thickness of the stainless steel plate is determined through structural calculation.

The protective door 2 not only serves as an inlet and an outlet of a battery to be tested, changes of materials of the box body 1 under the condition that the lithium ion battery is burnt or exploded due to short circuit are observed, the more important function is that the protective door serves as an explosion venting surface when the lithium ion battery is exploded, when the lithium ion battery is exploded and the pressure exceeds 0.2MPa, the protective door 2 can be separated from the protective door and serves as the explosion venting surface to release pressure, and shock waves generated by explosion of the lithium ion battery are released.

The protective door 2 adopts a light heat-resistant partition board, is provided with an explosion-proof window 13 and a handle 14, adopts toughened glass and has the function of an observation window. The neodymium iron boron magnetism nature material is placed to the inboard edge of guard gate 2, and the neodymium iron boron magnetism strip can be high temperature resistant, and unlikely burning high temperature melts, can guarantee its incasement leakproofness simultaneously, and the environmental protection and the personnel's protective action that increase the use can not overflow and leak away to a large amount of smog that produce when lithium ion battery burns.

The constant temperature test chamber is also provided with an electrostatic earth conductor to prevent the chamber body 1 from generating electrostatic sparks.

The process of using the constant temperature test chamber is as follows: firstly, opening the protective door 2, putting the supporting plate with the mounted battery to be tested into a test box, penetrating a reserved test lead through a lead hole in the rear wall of the box body, mounting a heat-insulating ring, then covering the protective door 2, and connecting the reserved test lead with an intelligent battery testing device; the constant temperature test box is started to preheat for 10min, after the temperature displayed by the control device 3 reaches the set temperature, the battery test is carried out, in the test process, after the temperature reaches the preset temperature, the cooling fan and the thermoelectric semiconductor refrigeration assembly can be automatically controlled to stop working, when the temperature difference exceeds 0.5 ℃, the cooling fan and the thermoelectric semiconductor refrigeration assembly start working again, and the temperature in the box is kept constant.

[ Battery monitoring System ]

The battery testing device is also provided with an intelligent battery monitoring system, is used for measuring the quality and the dynamic characteristics of the storage battery of the electric power monitoring device, detects the capacity of the battery to be tested, realizes the independent management of each battery to be tested, has an online monitoring function, and can carry out real-time online monitoring on each single battery to be tested when the battery pack is in online discharge and charging states, and the monitoring content comprises: the indexes of the voltage of the whole battery pack, the charging and discharging current of the battery, the monitoring time of the battery pack, the charging and discharging capacity of the battery pack and the like. The working test flow is as follows:

step 1: the detection personnel connects the battery to be detected with the interface of the multi-path switching device, and the system is electrified and self-checked;

step 2: scanning a bar code of a battery to be detected by using a code scanning gun, and displaying information such as a manufacturer, an equipment model and the like of the battery to be detected above a system interface; the equipment information can also be displayed by inputting the equipment ID of the detected battery to be detected;

and 3, step 3: selecting a test mode which is divided into an independent charging mode, an independent discharging mode and a simultaneous charging and discharging mode;

and 4, step 4: charging parameters set by the device are input to an upper computer, and the upper computer transmits the charging parameters to a controller through a network communication module;

and 5: the sampling module collects data such as voltage, current and the like in the charging and discharging test process in real time and transmits the data to the upper computer through a communication network;

step 6: and analyzing the test result after the test is finished, and generating a test report.

[ Battery Charge/discharge test ]

The specific workflow is shown in fig. 6:

system self-checking: when the system is powered on, the device firstly enters a self-checking flow, carries out self-checking on a module of the device, detects the quality of an alternating current power supply signal at a power grid end, issues related correction parameters and the like, and exits the self-checking flow of the device after the self-checking of the system is finished; the system can automatically prompt the self-checking result;

setting test parameters: after self-checking, selecting a battery mode to be tested, and then setting parameters of the equipment to be tested;

selecting a test mode: the test modes of the battery to be tested comprise an independent charging mode, an independent discharging mode and a simultaneous charging and discharging mode;

individual charging mode: when a charging command is sent out, the system enters a charging mode from a standby mode, connects the battery pack electrode to an interface of a capacity test terminal of the testing device, and describes according to a charging flow sequence: taking a battery pack with 7.2V as a charging cut-off voltage as an example, manually inputting charging parameters set by the device into an upper computer, sending the charging parameters to a controller through network communication, receiving instructions of the upper computer and the controller by a multi-way switch module, controlling a relay connected with the charging module to be switched on, connecting a battery into a charging circuit, wherein the multi-way switch module mainly comprises a plurality of groups of relays, and the charging module is realized by controlling a boost DC/DC converter by the controller; then the AC/DC rectification module converts the 220V alternating current input by the power supply module into stable voltage by a full-wave synchronous rectification method; the input direct-current voltage is boosted through a full-bridge DC/DC converter to charge the battery pack;

the charging method adopts a five-section method for charging:

the first stage is to pre-charge the battery with a small current I0, and the second stage is started after the pre-charge time is reached; in the second stage, I1 constant current charging is carried out on the battery, and the battery enters a third stage after reaching a specific voltage; in the third stage, constant voltage charging with the voltage of V0 is carried out on the battery, and the fourth stage is carried out after the charging current is reduced to a specific current I2; in the fourth stage, I3 constant current charging is carried out on the battery, and the fifth stage is carried out when the voltage rises to the cut-off voltage; the fifth stage performs constant voltage charging of the cut-off voltage to the battery until the current drops to 0.01C (nominal capacity) to terminate the charging. The five-section charging method greatly reduces the loss in the control circuit due to overhigh voltage of the battery circuit and saves the energy of a power grid.

After the charging process is started, the sampling module samples the terminal voltage, the current and the temperature of the battery in real time, and after the temperature of the battery is higher than a set safety range in the charging process, the battery stops charging until the temperature of the battery is recovered to be normal and continues charging. Parameters such as charging current and the like can be detected in real time in the process, if faults are detected, the process is skipped, and corresponding equipment codes are displayed on a system.

Individual discharge mode: when a discharge command is sent out, the system enters a discharge mode from a standby mode, the battery pack electrode is connected to an interface of a capacity test terminal of the test device, and according to a discharge flow: taking a battery pack with 4V as a discharge cut-off voltage as an example, manually inputting discharge parameters set by the device into an upper computer, transmitting the discharge parameters to a controller through network communication, receiving instructions of the upper computer and the controller by a multi-way switch module, controlling a relay connected with a discharge module to be conducted, and connecting a battery into a discharge circuit; the voltage reduction is then connected to the electronic load through the full bridge DC/DC converter to consume power.

The discharge process adopts a three-stage discharge method for discharging:

the first stage discharges the battery with small current, and enters the second stage after the discharge time is reached; and the battery in the second stage is subjected to constant current discharge of 0.05C, discharged to a specific voltage and enters the third stage, and the battery in the third stage is subjected to constant current discharge of 0.1C until the battery voltage is lower than a cut-off voltage for a specific time and then is stopped to discharge. Through the control battery discharge current of syllogic discharge, it is accurate to have reduced circuit loss capacity detection, reduces the temperature simultaneously and produces.

After the discharging process is started, the sampling module samples the terminal voltage, the current and the temperature of the battery in real time, and after the temperature of the battery is higher than a set safety range in the discharging process, the battery stops discharging until the temperature of the battery is recovered to be normal, and the battery continues to discharge.

Simultaneous charge-discharge mode: when a simultaneous charge and discharge command is issued, the system enters a simultaneous charge and discharge mode from a standby mode, and two sets of batteries are taken as an example for easier description of the implementation method of the mode. The battery pack 1 delivers power to the battery pack b through the multi-way switch module and the current bus.

The charge and discharge simultaneous mode is a process of discharging electric energy in the battery pack 1 to a dc current bus and charging the battery 2 while consuming the electric energy. The battery 1 and battery 2 electrodes were attached to the test device test terminal interface. The battery pack 1 releases electric energy of the battery pack 1 to a common current bus through the boosting DC/DC converter, the released electric energy collects the electric energy through the current bus, the battery pack 2 is charged in a voltage reduction mode through the voltage reduction DC/DC converter, and surplus current is stored in the super capacitor. When the electric energy of the battery pack 1 is completely released and the battery pack 2 is not fully charged, the multi-way switch module conducts a switch connected with the super capacitor, and the super capacitor is adopted to charge the battery pack 2; when the electric energy of the battery pack 1 is not completely released and the electric quantity of the battery pack 2 is fully charged, the multi-way switch module conducts a switch connected with the super capacitor, and the super capacitor is adopted to store the energy which is more than that of the battery pack 1.

[ Battery Capacity test ]

The intelligent battery monitoring system is also provided with a monitoring method for automatically charging and discharging to test the battery capacity, and the specific working process is shown in figure 7:

setting capacity test parameters: the upper computer sets parameters such as charging duration, charging cut-off voltage, discharging duration, charging and discharging test cycle times and the like;

the battery to be tested starts to charge: the upper computer controls the charging module to start charging the battery to be tested, and the sampling module acquires the terminal voltage, the current and the temperature of the battery in real time; after the temperature of the battery reaches a warning value of 45 ℃ in the charging process, pausing the charging process for 30min, if the sampling temperature is lower than the warning value, restarting the charging, and if the temperature is still higher than the warning value, continuing stopping for 30min; stopping charging when the battery charging reaches a preset time or the battery terminal voltage reaches a charging cut-off voltage, and continuing charging for 30min and then judging if the charging stop condition is not met; standing for 30min after charging is finished, and waiting for discharging;

the battery to be tested begins to discharge: when the standing time is up, starting to discharge the battery to be tested, collecting the voltage, the current and the temperature of the battery in real time by a sampling module, pausing the discharge for 30min when the temperature of the battery reaches an alarm value in the discharge process, continuing to start the discharge if the temperature of the battery is lower than the alarm value, and continuing to pause for 30min if the temperature is still higher than the alarm value; after the discharge is started, judging whether the discharge reaches a preset duration or whether the battery terminal voltage is lower than a discharge cut-off voltage, if the discharge stop condition is not met, continuing the discharge, and if the discharge stop condition is reached, stopping the discharge;

calculating the capacity of the battery to be tested: and adding 1 to the number of cyclic charge and discharge times, calculating the capacity obtained by testing in the cycle, stopping testing if the calculated capacity meets the standard, performing next charge and discharge cyclic capacity test if the calculated capacity does not meet the standard, stopping the capacity test when the cyclic charge and discharge test reaches a set value, and determining the battery capacity as the maximum value obtained by calculation in all tests.

Use the utility model discloses a during testing arrangement, select the multiunit battery that awaits measuring, place the battery that awaits measuring before the test on the battery anchor clamps in the constant temperature test box, this device can carry out multichannel simultaneous measurement to the group battery that awaits measuring, to capacity test substandard group battery keep next round of charge-discharge test, to capacity test battery up to standard, through this battery of multichannel switch module control entering off-line state, carry out five rounds of charge-discharge tests at most, testing arrangement analyzes monitoring data, finally generates the test result report. In the using process, the method has the following technical effects:

1) The device can realize simultaneous testing of multi-path charging and discharging, greatly improves the efficiency of single-path testing and shortens the testing time.

2) And meanwhile, the test battery is charged and discharged, so that the other battery to be tested is charged when the battery to be tested is discharged, and the energy waste is reduced.

3) During the use, set up corresponding automatic test parameter in the software of computer, alright in order testing automatically, continuously, accomplish the work of awaiting measuring battery cycle charge and discharge and record test data accurately, liberate the tester from loaded down with trivial details charge and discharge control and data record work, the tester can be with energy dispersion to other affairs, has promoted work efficiency, has practiced thrift the cost of labor.

By adopting the technical scheme of the utility model, the constant temperature test box does not need any refrigerant, can continuously work, has no pollution source, has no vibration and noise during working, has long service life and is easy to install; the semiconductor refrigerating assembly has two functions of refrigerating and heating, so that a heating system and a refrigerating system which are separated can be replaced by one part; meanwhile, the semiconductor refrigeration component is a current transduction type part, and high-precision temperature control can be realized through control of input current; the semiconductor refrigerating assembly has very small thermal inertia, the refrigerating and heating time is fast, and the refrigerating sheet can reach the maximum temperature difference when the power is on for less than one minute under the conditions that the heat dissipation of the hot end is good and the cold end is in no load; the bottom of the constant temperature test box is provided with a leakage-proof groove with the height of 50mm, so that the combustible liquid chemicals are prevented from overflowing; the constant temperature test box is also provided with an electrostatic grounding wire to prevent the cabinet body from generating electrostatic sparks, thereby increasing the use safety.

In the description of the present invention, the terms "connect", "mount", "fix", etc. should be interpreted broadly, for example, the term "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, the description of the terms "one embodiment," "some embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an explosion-proof constant temperature battery test box of intelligence which characterized in that includes:

the box body is provided with an explosion-proof protective door and is internally provided with a supporting plate;

the battery clamps are arranged on the supporting plate and used for fixing a plurality of groups of batteries to be tested;

the constant temperature device is arranged in the box body and is used for keeping the test temperature in the box body constant;

the safety device comprises a flame detector arranged inside the box body and a fire extinguishing device arranged outside the box body and is used for safety protection of the test;

and the control device is arranged outside the box body, is respectively electrically connected with the constant temperature device, the safety device and the power supply and is used for regulating and controlling the test temperature.

2. The battery test box of claim 1,

the constant temperature device comprises a temperature sensor arranged at the center inside the box body, a radiator arranged on the rear wall inside the box body and a refrigerator arranged at the top inside the box body, and the constant temperature device is respectively connected with the control device.

3. The battery test box of claim 2,

the refrigerator is a thermoelectric semiconductor refrigeration assembly, can perform heating or refrigeration operation, and has a temperature regulation range of-20-80 ℃.

4. The battery test box of claim 1,

the fire extinguishing device is provided with a fire extinguisher, a fire extinguishing switch and a nozzle; wherein, the first and the second end of the pipe are connected with each other,

the nozzle is connected with the fire extinguisher through a pipeline; the fire extinguishing switch is respectively connected with the fire extinguisher and the control device; the nozzle is arranged inside the box body.

5. The battery test box of claim 1,

the flame detector adopts a photosensitive near-infrared flame detector and is connected with the control device.

6. The battery test box of claim 1,

the battery clamp is provided with a test clamping point and is used for connecting a battery to be tested;

a test lead is fixed on the supporting plate;

and one end of the test lead is connected with the test clamping point, and the other end of the test lead penetrates through the rear wall of the box body and is electrically connected with the intelligent battery testing device.

7. The battery test box of claim 1,

still include dehydrating unit, set up inside the box, set up many places, with controlling means electric connection for regulation and control the inside humidity of box.

8. The battery test box of claim 1,

the box body is a double-layer explosion-proof box body or a multi-layer explosion-proof box body with an interlayer, and a heat preservation unit is arranged in the interlayer.

9. The battery test box of claim 1,

the middle part of the protective door is provided with an explosion-proof window, and the periphery of the interior of the protective door is provided with a sealing element.

10. The battery test box of claim 1,

and the power supply is arranged outside the box body and is electrically connected with the control device through a main switch.

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