High-voltage alarm protection device for charging and discharging test equipment

Abstract

The utility model relates to the technical field of lithium battery testing, in particular to a high-voltage alarm protection device for charging and discharging testing equipment. The execution unit, the control unit and the resistor are arranged in the equipment shell, the control panel is in mutual electric signal connection with the execution unit and the control unit, a wiring terminal row group is further arranged on the rear side of the equipment shell, and the wiring terminal row group is used for connecting a power line of the charging and discharging test equipment with a battery pack. And a driving switch and an emergency stop switch are arranged on the control panel. According to the technical scheme of the utility model, the novel control circuit system is arranged, so that the influence of a high-voltage arc discharge phenomenon caused by instantaneous high voltage when the charging and discharging test equipment is connected with the battery pack on test operators and tested battery pack products can be avoided; the safety of an operation process is improved, the operation intensity of personnel operation is reduced, and faults of charging and discharging test equipment are reduced; the whole structure is simple, safety is high, and operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery test technical field especially relates to a kind of high-pressure alarm protection device of charge-discharge test equipment. BACKGROUND

[0002] With the continuous popularization of lithium ion cell application field, for example, pure electric animal logistics car, shared light car lithium ion product family energy storage etc., the safety performance and energy ratio of the battery used in these products are very high, and the battery pack working condition simulation test equipment before delivery. It can realize the charge-discharge test of the assembled power battery system by setting the working condition, evaluate the capacity, efficiency, state of charge, thermal performance and other comprehensive performance of the battery pack, verify the battery detection accuracy and energy state estimation accuracy of battery management system, and provide test basis for effective management of battery pack after vehicle assembly.

[0003] The existing total voltage overcharge-discharge constant voltage 60% or more battery pack will have instantaneous high voltage when connecting the power line during charge-discharge test, which will cause the charge-discharge test equipment to alarm and cannot normally run the test step.

[0004] Therefore, it is necessary to design a high-voltage alarm protection device for charge-discharge test equipment to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of high-voltage alarm protection device for charge-discharge test equipment to overcome the above-mentioned deficiencies existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A kind of high-voltage alarm protection device for charge-discharge test equipment, it includes equipment shell, the execution unit placed in the equipment shell, control unit, resistance and the control panel of the mutual electric signal connection with the execution unit, control unit, it is characterized by: wiring terminal bank group is further provided on the rear side of the equipment shell, wiring terminal bank group is used for the connection of the power line of charge-discharge test equipment and battery pack, driving switch and emergency stop switch are provided on the control panel;

[0008] The execution unit includes pre-hybrid DC relay, pre-hybrid DC relay closing switch, working DC relay closing switch and working DC relay;

[0009] The control unit includes time relay, time relay closing switch, first pre-hybrid intermediate relay closing switch, second pre-hybrid intermediate relay closing switch, pre-hybrid intermediate relay, intermediate relay closing switch, intermediate relay and switching power supply.

[0010] Preferably, the positive pole of the switching power supply is connected with the emergency stop switch and the driving switch in sequence, the driving switch is connected with the pre-combination DC relay, the intermediate relay closing switch is arranged between the driving switch and the pre-combination DC relay, the time relay and the pre-combination DC relay closing switch are connected in parallel with the intermediate relay closing switch and the pre-combination DC relay, the time relay closing switch and the working DC relay are connected in parallel with the time relay and the pre-combination DC relay closing switch, the pre-combination intermediate relay and the first pre-combination intermediate relay closing switch are connected in parallel with the time relay closing switch and the working DC relay, and the second pre-combination intermediate relay closing switch and the intermediate relay are connected in parallel with the pre-combination intermediate relay and the first pre-combination intermediate relay closing switch.

[0011] Preferably, the working DC relay and the pre-combination intermediate relay are arranged in parallel with each other.

[0012] Preferably, the intermediate relay is further connected in parallel with a signal lamp.

[0013] Preferably, the pre-combination DC relay closing switch, the working DC relay closing switch, the time relay closing switch, the first pre-combination intermediate relay closing switch and the second pre-combination intermediate relay closing switch all belong to normally open states, and the intermediate relay closing switch is a normally closed switch.

[0014] The beneficial effects of the utility model are as follows: the novel control circuit system is arranged, the influence of high-voltage arc phenomenon caused by instantaneous high voltage when the battery pack is connected with the charge-discharge test equipment on test operators and the measured battery pack product is avoided, the alarm caused by instantaneous high voltage and the recovery process of subsequent charge-discharge test operation are avoided, the damage of electronic circuit components caused by the impact of instantaneous high voltage on the electronic circuit of the equipment is avoided, the safety of the operation process is improved, the operation intensity of personnel operation is reduced, the failure of the charge-discharge test equipment is reduced, the overall structure is simple, safe, practical and convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structural schematic view of the utility model of a kind of charge-discharge test equipment high-pressure alarm protection device;

[0016] Fig. 2 It is the internal section view of the utility model of a kind of charge-discharge test equipment high-pressure alarm protection device;

[0017] Fig. 3 It is the working principle diagram of the utility model of a kind of charge-discharge test equipment high-pressure alarm protection device;

[0018] In the figure: 1, device housing; 4, execution unit; 5, control unit; 6, resistance; 3, control panel; 2, wiring terminal group; 31, drive switch; 32, emergency stop switch; 41, pre-combination DC relay; 51, time relay; 52, pre-combination intermediate relay; 53, intermediate relay; 54, switching power supply. DETAILED DESCRIPTION

[0019] Reference Figs. 1 to 3 A high-voltage alarm protection device for a charge-discharge test equipment, comprising a device housing 1, an execution unit 4 placed in the device housing, a control unit 5, a resistance 6, and a control panel 3 connected with the execution unit and the control unit;

[0020] The resistance is connected in series in the pre-combination circuit, and plays a role in voltage division at the moment when the power line of the charge-discharge test equipment is connected with the battery pack, so as to suppress the high voltage generated at the moment when the power line of the charge-discharge test equipment is connected with the battery pack.

[0021] A wiring terminal group 2 is further arranged at the rear side of the device housing; the wiring terminal group 2 is used for the connection of the power line of the charge-discharge test equipment and the battery pack;

[0022] The control panel 3 is provided with a drive switch 31 and an emergency stop switch 32;

[0023] The execution unit 4 comprises a pre-combination DC relay 41 and a working DC relay 42, which are used for connecting and disconnecting the connection of the power line of the charge-discharge test equipment and the battery pack according to the control logic;

[0024] The control unit 5 comprises a time relay 51, a pre-combination intermediate relay 52, an intermediate relay 53, and a switching power supply 54, which are used for timely connecting and disconnecting the DC relay of the execution unit according to the control logic;

[0025] The positive pole of the switching power supply is connected with the emergency stop switch 32 and the drive switch 31 in sequence, the drive switch 31 is connected with the pre-combination DC relay 41 KM1, and the intermediate relay closed switch KA2 is arranged between the drive switch 31 and the pre-combination DC relay 41;

[0026] The time relay 51 KT and the pre-combination DC relay closed switch KM1 are connected in parallel with the intermediate relay closed switch KA2 and the pre-combination DC relay 41;

[0027] The time relay closed switch KT and the working DC relay 42 KM2 are connected in parallel with the time relay 51 KT and the pre-combination DC relay closed switch KM1;

[0028] The pre-combination intermediate relay 52KA1 and the first pre-combination intermediate relay closed switch KA1 are in parallel with the time relay closed switch KT and the working DC relay 42; the working DC relay 42 and the pre-combination intermediate relay 52 are arranged in parallel with each other;

[0029] The second pre-combination intermediate relay closed switch KA11 and the intermediate relay 53KA2 are in parallel with the pre-combination intermediate relay 52 and the first pre-combination intermediate relay closed switch;

[0030] The intermediate relay 53 is in parallel with a signal lamp L;

[0031] The pre-combination relay, the intermediate relay, the time relay, the pre-combination DC relay 41 and the working DC relay respectively control corresponding closed switches; all the closed switches belong to normally open states, wherein the intermediate relay closed switch is a normally closed switch and is controlled to be closed by the intermediate relay 53;

[0032] The working principle of the embodiment is as follows: when the starting switch 3-1 on the operation panel is pressed, the pre-combination DC relay 4-1 and the intermediate relay 5-2 are powered, the working DC relay control circuit is turned on after 1-1.5 seconds of time relay delay, the time of which can be set, the intermediate relay is turned on, the intermediate relay self-locks the control circuit of the DC relay and the intermediate relay, the pre-combination intermediate relay moving contact simultaneously turns on the control circuit of the intermediate relay, and the intermediate relay 5-3 moving contact breaks the control circuit of the pre-combination DC relay and the time relay; the self-locking button on the operation panel is pressed again, and the button switch is released to disconnect the control circuit.

[0033] The power line of the charge-discharge test equipment is locked with the high-voltage alarm protection device of the charge-discharge test equipment, the battery pack is connected with the protection device, the high-voltage alarm protection device of the charge-discharge test equipment is connected in series in the charge-discharge loop of the charge-discharge test equipment and the battery pack, and the problem of high-voltage alarm of the charge-discharge test equipment due to instantaneous high-voltage connection is prevented.

[0034] The utility model discloses the beneficial effect, this technical scheme avoids the influence of the high-voltage arc phenomenon caused by instantaneous high-voltage when the charge-discharge test equipment is connected with the battery pack on the test operator and the measured battery pack product through the novel control circuit system;The recovery processing flow of the subsequent charge-discharge test operation is avoided due to the instantaneous high-voltage alarm of the equipment;The damage of the electronic circuit components caused by the impact of the instantaneous high-voltage on the electronic circuit is avoided;The safety of the operation process is improved, the operation intensity of the personnel operation is reduced, and the charge-discharge test equipment failure is reduced;The overall structure is simple, the safety is high, the practicality is strong, and the operation is convenient.

[0035] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A high-voltage alarm protection device for a charge-discharge test equipment, comprising an equipment shell, an execution unit placed in the equipment shell, a control unit, a resistor, and a control panel in electrical signal connection with the execution unit and the control unit, characterized in that: A wiring terminal row group is arranged on the rear side of the device shell, and is used for the connection of the power line of the charge-discharge test device and the battery pack. The execution unit comprises a pre-coordinated DC relay, a pre-coordinated DC relay closing switch, a working DC relay closing switch, and a working DC relay. The control unit comprises a time relay, a time relay closing switch, a first pre-coordinated intermediate relay closing switch, a second pre-coordinated intermediate relay closing switch, a pre-coordinated intermediate relay, an intermediate relay closing switch, an intermediate relay, and a switching power supply.

2. The high pressure alarm protection device for charge and discharge test equipment according to claim 1, characterized in that: The positive pole of the switching power supply is connected to the emergency stop switch and the driving switch in sequence, the driving switch is connected to the pre-coordinated DC relay, the intermediate relay closing switch is arranged between the driving switch and the pre-coordinated DC relay, the time relay and the pre-coordinated DC relay closing switch are connected in parallel to the intermediate relay closing switch and the pre-coordinated DC relay, the time relay closing switch and the working DC relay are connected in parallel to the time relay and the pre-coordinated DC relay closing switch, the pre-coordinated intermediate relay and the first pre-coordinated intermediate relay closing switch are connected in parallel to the time relay closing switch and the working DC relay, and the second pre-coordinated intermediate relay closing switch and the intermediate relay are connected in parallel to the pre-coordinated intermediate relay and the first pre-coordinated intermediate relay closing switch.

3. The high voltage alarm protection device for charge and discharge test equipment according to claim 2, characterized in that: The working DC relay and the pre-coordinated intermediate relay are connected in parallel to each other.

4. The high voltage alarm protection device for charge and discharge test equipment according to claim 2, characterized in that: The intermediate relay is further connected in parallel to a signal lamp.

5. The high voltage alarm protection device for charge and discharge test equipment according to claim 2, characterized in that: The pre-coordinated DC relay closing switch, the working DC relay closing switch, the time relay closing switch, the first pre-coordinated intermediate relay closing switch, and the second pre-coordinated intermediate relay closing switch are all in the normally open state, and the intermediate relay closing switch is a normally closed switch.

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