Lithium battery pack tester

Abstract

The utility model relates to the technical field of lithium battery pack testing, in particular to a lithium battery pack tester, which comprises a metal plate iron box and a lithium battery pack, an input and output enabling aviation socket and a high-voltage aviation socket are arranged below an input enabling indicating lamp, a main positive output terminal is arranged on one side of a KEY ON switch button, and a negative positive output terminal is arranged on the other side of the KEY ON switch button. A main positive input terminal is arranged on one side of the power switch, a main negative terminal and a charging socket are arranged at the rear end of the metal plate iron box, a storage battery, a main positive relay, a pre-charging relay, a pre-charging resistor and a current sampling and control circuit are arranged in the metal plate iron box, and a simulation load is further arranged on the metal plate iron box. According to the utility model, the working condition of a battery after being connected with a load can be simulated in a lithium battery factory, so that the battery can be tested, the stability of the factory battery can be improved, the after-sale cost can be reduced, the power-on and charge-discharge processes can be simulated under the condition that the battery pack is not loaded, and the charge-discharge capacity of the battery pack can be tested.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery group test technical field, concretely is a kind of lithium battery group tester. BACKGROUND

[0002] In the manufacturing process of lithium battery group, many battery groups must work with electric load circuit in coordination, because battery group itself cannot complete the power-on process of charge and discharge independently. These loads can be forklifts, new energy vehicles or other equipment. Usually, the production of battery group and the production of electric equipment are not carried out in the same factory. This makes it difficult to test the battery after production is completed, and once the untested battery is sent to the user factory, unexpected problems often occur, which not only increases the after-sales cost, but also seriously affects the brand image.

[0003] Therefore, the person skilled in the art designs a lithium battery group tester, which can simulate the working condition of the battery after being connected to the load in the lithium battery factory, so as to test the battery, which helps to improve the stability of the battery out of the factory and reduce the after-sales cost. It can simulate the power-on and charge-discharge process without battery installation, and test the charge-discharge capacity of the battery group. SUMMARY

[0004] In view of the problems in the related art, the utility model provides a lithium battery group tester to overcome the above technical problems existing in the prior art. The purpose of the utility model is to simulate the use scenario of the battery in actual work. The tester provides assistance for technicians during battery testing, helping them to efficiently complete various battery testing tasks. It not only helps to reduce or avoid the failure rate of the battery when it leaves the factory, but also reduces the subsequent after-sales cost. Its design structure is compact, the function is comprehensive, it is convenient to carry, and it is suitable for use in lithium battery PACK factory, vehicle manufacturing plant and after-sales maintenance service environment.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a lithium battery group tester, including sheet metal iron box and lithium battery group, the top of sheet metal iron box is provided with handle, the front end of sheet metal iron box is provided with output enable indicator, the below of output enable indicator is provided with input enable switch, the below of input enable switch is provided with input enable indicator, the below of input enable indicator is provided with input output enable aviation socket and high pressure aviation socket, one side of input enable indicator is provided with display screen, one side of display screen is provided with KEY ON switch button and power switch respectively, one side of KEY ON switch button is provided with main positive output terminal, one side of power switch is provided with main positive input terminal, the rear end of sheet metal iron box is provided with main negative terminal and charging socket, the inside of sheet metal iron box is provided with battery, main positive relay, precharge relay, precharge resistance and current sampling and control circuit respectively, sheet metal iron box still is provided with analog load.

[0006] Preferably, the analog load comprises a load resistor and a load capacitor.

[0007] Preferably, the display screen is provided with a function switching button.

[0008] Preferably, the display screen and the current sampling and control circuit are electrically connected, and the output enable indicator, the input enable switch and the input enable indicator are electrically connected with the input output enable aviation socket.

[0009] Preferably, the input enable switch and the input enable indicator are each provided with three.

[0010] Preferably, the output enable indicator is provided with nine.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model relates to a kind of lithium battery group tester, it can simulate the actual working condition of battery after connecting load in lithium battery factory, to carry out detailed test to battery, the stability of battery of this tester helps to improve and reduces after-sales cost, it can simulate power-on and charge-discharge process under the condition that battery group is not installed vehicle, and the charge-discharge capacity of battery group is accurately tested, the tester can simulate the use scene of battery in actual work, provide powerful auxiliary for technical personnel in battery test phase, help them to efficiently complete each battery test task, not only help to reduce or avoid the failure rate of battery when factory, but also can reduce subsequent after-sales cost, its design structure is compact, function is comprehensive, convenient to carry, very suitable for use in lithium battery PACK factory, vehicle manufacturing plant and after-sales maintenance service etc. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the metal sheet iron box of the utility model;

[0014] Figure 2 It is a structure schematic view of the metal sheet iron box inside the utility model;

[0015] Figure 3 It is a structure schematic view of the back view of the metal sheet iron box of the utility model;

[0016] Figure 4 It is a circuit principle structure schematic view of the utility model.

[0017] In the figure, 1 is a metal sheet iron box; 2 is a handle; 3 is an output enable indicator lamp; 4 is an input enable switch; 5 is an input enable indicator lamp; 6 is an input and output enable aviation socket; 7 is a high-voltage aviation socket; 8 is a display screen; 9 is a KEYON switch button; 10 is a power switch; 11 is a main positive output terminal; 12 is a main positive input terminal; 13 is a lithium battery pack; 14 is a main negative terminal; 15 is a charging socket; 16 is a storage battery; 17 is a main positive relay; 18 is a pre-charging relay; 19 is a pre-charging resistor; 20 is a current sampling and control circuit; 21 is an analog load. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0019] EMBODIMENT

[0020] Please refer to Figures 1-4The utility model provides a technical scheme of lithium battery group tester: a lithium battery group tester, including sheet metal iron box 1 and lithium battery group 13, the top of sheet metal iron box 1 is provided with handle 2, specifically, it is convenient to carry through setting handle 2, the front end of sheet metal iron box 1 is provided with output enable indicator 3, specifically, output enable indicator 3 is the indicator for indicating " output enable " state, and output enable is a function of control system, and it decides whether the system allows signal or data to transmit from the output port of equipment to external circuit or system, the below of output enable indicator 3 is provided with input enable switch 4, specifically, input enable switch 4 refers to in some electronic systems or circuits, for controlling whether the input signal is allowed to enter the switch of system, it is a common control element, is usually used for protecting circuit or temporarily disabling input signal under certain conditions, and input enable switch can ensure that the system works normally under certain conditions and avoids unnecessary interference or signal error by enabling or disabling input channel, the below of input enable switch 4 is provided with input enable indicator 5, specifically, input enable indicator 5 is the indicator for showing or indicating the enabling state of input signal channel in equipment or system, and input enable indicator 5 is used with input enable switch 4, and tells the user whether the input channel has been enabled or is in active state by lighting or extinguishing, the below of input enable indicator 5 is provided with input output enable aviation socket 6 and high voltage aviation socket 7, specifically, input output enable aviation socket 6 is a connector, helps to manage the enabling and disabling state of input and output signal, ensures that equipment carries out signal transmission at appropriate time, and high voltage aviation socket 7 is used for the connector under high voltage environment, is used to ensure that power or signal is stably and safely transmitted under high voltage, current and severe environmental conditions, and high voltage aviation socket 7 usually needs to have stronger insulation performance, anti-interference ability and high-temperature resistance, vibration resistance and other characteristics, improves safety, one side of input enable indicator 5 is provided with display screen 8, specifically, through setting display screen 8, it is convenient for user to visually check data, one side of display screen 8 is provided with KEY ON switch button 9 and power switch 10 respectively, and KEY ON switch button 9 refers to a switch button for starting or activating the power supply of equipment, and power switch 10 is a device for controlling the on-off of the power supply of electrical equipment, which can enable or cut off the power supply of equipment through simple operation (such as pressing, rotating, dialing etc.), one side of KEY ON switch button 9 is provided with main positive output terminal 11, specifically, main positive output terminal 11 refers to the positive terminal of power or signal output, one side of power switch 10 is provided with main positive input terminal 12, specifically, main positive input terminal 12 refers to the positive terminal of power or signal input.The rear end of the sheet metal box 1 is equipped with a main negative terminal 14 and a charging socket 15. Specifically, the main negative terminal 14 refers to the terminal in electrical equipment, battery systems, or circuits that connects to the negative current or voltage. The charging socket 15 is a socket used to provide power to electronic devices, home appliances, power tools, etc., and is usually used to recharge batteries or provide power to equipment. Inside the sheet metal box 1, there are a storage battery 16, a main positive relay 17, a pre-charge relay 18, a pre-charge resistor 19, and a current sampling and control circuit 20. Specifically, the storage battery 16 is a device that can store electrical energy, converting electrical energy into chemical energy through a chemical reaction and releasing it for use when needed. The main positive relay 17 is a relay used to protect electrical circuits. It is commonly used in power systems and equipment to control and protect the flow of current, preventing equipment damage caused by overload, short circuit, or other faults. The pre-charge relay 18 is a relay used in electrical systems to realize capacitor or The relay with pre-charging function for energy storage devices such as batteries primarily functions to gradually charge the energy storage device by controlling the current input, preventing damage to electrical equipment from current surges, especially in high-power electrical equipment and high-voltage battery systems for electric vehicles (EVs). The pre-charging resistor 19 primarily limits the current, preventing instantaneous high-current surges from damaging capacitors, batteries, or other energy storage components. The current sampling and control circuit 20 monitors the current signal in real time and performs corresponding control based on the sampling results to ensure the safe, stable, and efficient operation of the system. The sheet metal box 1 is also equipped with a simulated load 21. Specifically, the simulated load 21 is an adjustable or programmable load used during the testing, development, or debugging of power systems, electronic equipment, or circuits to simulate load conditions in a real-world working environment. Its purpose is to evaluate the system's performance, efficiency, stability, or other characteristics, and it is typically tested without an actual load.

[0021] In this embodiment, the simulated load 21 can be set inside the sheet metal box 1 or outside the sheet metal box 1, depending on its own needs.

[0022] Furthermore, the simulated load 21 includes a load resistor and a load capacitor.

[0023] In this embodiment, a load resistor refers to a resistor connected to a power source or other electronic device in a circuit, which is used to absorb electrical energy and convert it into heat energy; a load capacitor refers to a capacitor connected to a power source or circuit as a load in electrical and electronic circuits. Load capacitors are typically used to simulate capacitive loads in circuits, or to adjust the frequency response, filtering characteristics, etc. of circuits.

[0024] Please see Figures 1-2 As shown, furthermore, a function switching button is provided on the display screen 8.

[0025] In this embodiment, the user is convenient to operate, improves the convenience.

[0026] Further, the display screen 8 and the current sampling and control circuit 20 are electrically connected, the output enable indicator light 3, the input enable switch 4 and the input enable indicator light 5 are electrically connected with the input and output enable aviation socket 6.

[0027] Please refer to Figures 1-2 As shown, further, the input enable switch 4 and the input enable indicator light 5 are provided with three.

[0028] Please refer to Figures 1-2 As shown, further, the output enable indicator light 3 is provided with nine.

[0029] The working principle of the utility model:

[0030] The first step: the positive terminal of lithium battery pack 13 is connected with the positive input terminal 11 of tester, and the negative terminal of lithium battery pack 13 is connected with the negative input terminal 14 of tester simultaneously, then, the output enable terminal, input enable terminal, 12V constant electricity +, 12V constant electricity - of lithium battery pack 13, KEY ON signal are connected with the corresponding circuit of tester through high-voltage aviation socket 7 and input and output enable aviation socket 6;

[0031] The second step: the power switch 10 is turned on, and the tester is powered, then the KEY ON button 9 is pressed to provide 12V power supply for the BMS of lithium battery pack 13, under normal circumstances, after the KEY ON button 9 is pressed, the BMS of lithium battery pack 13 will first perform self-checking, after the self-checking is completed, the pre-charging relay 18 is attracted, when the positive voltage of simulation load 21 rises to 90% of total voltage, the main positive relay 17 is attracted, and the pre-charging relay 18 is disconnected after 200 milliseconds, the power-on process is completed, and the corresponding output enable indicator light 3 is lit simultaneously to indicate the port state;

[0032] The third step: through the closure of input enable switch 4, the input enable signal can be simulated to trigger the BMS action of lithium battery pack 13 to test whether it meets the design requirements;

[0033] The fourth step: after the power-on is completed, the tester defaults to discharge test through the load resistor in simulation load 21, during the test process, the current sampling and control circuit 20 will collect current signal and transmit to the display screen 8 through the line to display the discharge current size and the discharged electric quantity (in AH unit). In addition, through the function switching button on the display screen 8, the current sampling and control circuit 20 can be switched to the state that the main positive input terminal 12 is directly connected to the main positive output terminal 11, and the simulation load 21 is disconnected, so as to carry out the charge-discharge test on lithium battery pack 13 through the external aging cabinet equipment.

[0034] Note: for the battery pack that needs to be powered on by communication, it must be used with the upper computer.

[0035] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "threading" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0037] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A lithium battery tester comprising a sheet metal iron box (1) and a lithium battery (13), characterized in that, The top of the sheet metal iron box (1) is provided with a handle (2), the front end of the sheet metal iron box (1) is provided with an output enable indicator light (3), the lower side of the output enable indicator light (3) is provided with an input enable switch (4), the lower side of the input enable switch (4) is provided with an input enable indicator light (5), the lower side of the input enable indicator light (5) is provided with an input and output enable aviation socket (6) and a high-voltage aviation socket (7), one side of the input enable indicator light (5) is provided with a display screen (8), one side of the display screen (8) is provided with a KEY ON switch button (9) and a power switch (10) respectively, one side of the KEY ON switch button (9) is provided with a main positive output terminal (11), one side of the power switch (10) is provided with a main positive input terminal (12), the rear end of the sheet metal iron box (1) is provided with a main negative terminal (14) and a charging socket (15), the inside of the sheet metal iron box (1) is provided with a storage battery (16), a main positive relay (17), a pre-charging relay (18), a pre-charging resistor (19) and a current sampling and control circuit (20) respectively, and the sheet metal iron box (1) is further provided with an analog load (21).

2. The lithium battery pack tester of claim 1, wherein: The analog load (21) comprises a load resistor and a load capacitor.

3. The lithium battery pack tester of claim 1, wherein: The display screen (8) is provided with a function switching button.

4. The lithium battery tester of claim 1, wherein: The display screen (8) and the current sampling and control circuit (20) are electrically connected, and the output enable indicator light (3), the input enable switch (4) and the input enable indicator light (5) are electrically connected with the input and output enable aviation socket (6).

5. The lithium battery tester of claim 1, wherein: The input enable switch (4) and the input enable indicator light (5) are each provided with three.

6. The lithium battery tester of claim 1, wherein: The output enable indicator light (3) is provided with nine.

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