Test tool for energy storage battery pack

Abstract

The utility model discloses a test tool for an energy storage battery pack, and the test tool comprises a circuit module which comprises an AC / DC conversion system which is used for converting AC into DC or converting DC into AC; the direct current-direct current conversion system is used for converting the direct current high voltage into direct current low voltage or converting the direct current low voltage into the direct current high voltage; the alternating current side of the alternating current-direct current conversion system is used for being connected with a power grid, the direct current side of the alternating current-direct current conversion system is connected with the high voltage side of the direct current-direct current conversion system, and the low voltage side of the direct current-direct current conversion system is used for being connected with a battery pack; the monitoring module monitors the working information of the AC-DC conversion system, the DC-to-DC conversion system and the battery pack. The testing tool for the energy storage battery pack is simple in structure, easy to operate and check, not prone to causing personal injury, and not prone to being damaged due to the fact that a heat source of a discharge resistor is removed.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage battery pack testing, in particular to a testing tool for an energy storage battery pack. Background Art

[0002] With the rise of the new energy industry, more stable requirements are put forward for the power grid, and more stringent requirements are also put forward for the equipment in the new energy industry. Therefore, the characteristics of peak shaving, valley filling and frequency modulation of energy storage products are becoming more and more popular. At the same time, the State Grid is also promoting the technological development of the energy storage industry to make more contributions to the stability of the power grid; with the booming development of the energy storage industry, the key components of energy storage products require better performance, more detailed function and safety testing. Based on the life limitation of the equipment itself, as well as equipment and personal safety, more simulation tests need to be carried out before the product is put on the machine during product testing, so as to find more defects, accelerate the product testing cycle, and thus accelerate the energy storage product listing cycle; as the most core component of the energy storage product, the battery pack must go through the testing stage. The schematic diagram of the existing battery pack testing device is as Figure 1 shown. The power grid is connected to the battery pack through an AC / DC conversion device. The battery pack is connected to a discharge resistor. In the testing device with this structure, when the battery pack is doing a discharge test, the testing cost is high, the power is large during charge and discharge testing, the discharge resistor converts electrical energy into heat energy and consumes it into the atmosphere, the safety is poor, and the discharge resistor is in a high temperature state during testing, which is easy to cause personal scalding accidents; in order to continuously cool the discharge resistor, a fan or even a high-power air conditioner is required for cooling, consuming more electrical energy. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: to provide a testing tool for an energy storage battery pack, which can perform charge testing and discharge testing on the battery pack.

[0004] The technical solution adopted by the utility model to solve the above technical problem is: a testing tool for an energy storage battery pack, including a circuit module, and the circuit module includes

[0005] an AC / DC conversion system for converting alternating current into direct current or converting direct current into alternating current;

[0006] a DC / DC conversion system for converting high-voltage direct current into low-voltage direct current or converting low-voltage direct current into high-voltage direct current;

[0007] The AC side of the AC / DC conversion system is used to connect to the power grid, the DC side of the AC / DC conversion system is connected to the high-voltage side of the DC / DC conversion system, and the low-voltage side of the DC / DC conversion system is used to connect to the battery pack;

[0008] The circuit module further includes a monitoring module, which monitors the operating information of the AC-DC conversion system, the DC-DC conversion system, and the battery pack.

[0009] Preferably, a circuit breaker QF01 is connected between the AC side of the AC-DC conversion system and the power grid; a circuit breaker QF02 is connected between the DC side of the AC-DC conversion system and the high-voltage side of the DC-DC conversion system; a circuit breaker QF03 is connected between the low-voltage side of the DC-DC conversion system and the battery pack.

[0010] Preferably, the AC-DC conversion system is internally provided with a first power module for obtaining its own power; and / or, the DC-DC conversion system is internally provided with a second power module for obtaining its own power; the monitoring module obtains the information of the first power module and / or the second power module.

[0011] Preferably, the battery pack is internally provided with a voltage acquisition module for obtaining its own voltage information, a current acquisition module for obtaining its own current information, and a temperature acquisition module for obtaining its own temperature information, and the monitoring module obtains the information of the voltage acquisition module, the current acquisition module, and the temperature acquisition module.

[0012] Preferably, the DC-DC conversion system includes a polar capacitor C1, a polar capacitor C2, an inductor L, a triode S1, a triode S2, a diode D1, and a diode D2. The positive pole of the polar capacitor C1 is connected in series with the inductor L and then connected to the collector of the triode S1 and the emitter of the triode S2. The collector of the triode S2 is connected to the positive pole of the polar capacitor C2. The negative pole of the polar capacitor C2 is connected to the emitter of the triode S1 and the negative pole of the polar capacitor C1. The positive pole of the diode D1 is connected to the emitter of the triode S2, and the negative pole of the diode D1 is connected to the collector of the triode S2. The positive pole of the diode D2 is connected to the emitter of the triode S1, and the negative pole of the diode D2 is connected to the collector of the triode S1. Both ends of the polar capacitor C1 are led out as the low-voltage side of the DC-DC conversion system, and both ends of the polar capacitor C2 are led out as the high-voltage side of the DC-DC conversion system.

[0013] Preferably, a test tool for an energy storage battery pack includes a control box, which includes a box body, a box door, and bottom wheels. The circuit module is installed inside the box body. The box door is provided with a display screen window, and a display screen is installed at the display screen window. The display screen is connected to the monitoring module in the circuit module.

[0014] Further preferably, an expansion board for placing a mouse and a keyboard is provided on the outer side of the box door, and the mouse and the keyboard are connected to the monitoring module in the circuit module.

[0015] Preferably, the AC-DC conversion system adopts a power conversion system for energy storage PCS or a bidirectional ACDC rectifier.

[0016] The beneficial effects of the present utility model are as follows: By connecting the battery pack through the AC-DC conversion system in combination with the DC-DC conversion system, it can be adapted to battery packs with a variety of different voltage specifications, and without using the discharge resistor in the prior art, there is no need for a separate cooling device for the discharge resistor. By obtaining the working information of the AC-DC conversion system, the DC-DC conversion system, and the battery pack through the monitoring module, the information of the battery pack during the charging test or the discharging test can be obtained. The test tooling structure of the energy storage battery pack of the present utility model is simple, easy to operate and view, not prone to causing personal injury, and since the heat source of the discharge resistor is removed, the tooling is not easily damaged. Description of the Drawings

[0017] Figure 1 is the schematic diagram of the existing test device for the battery pack;

[0018] Figure 2 is the circuit schematic diagram of the test tooling for the energy storage battery pack of the present utility model;

[0019] Figure 3 is the circuit schematic diagram of an optional implementation manner of the DC-DC conversion system of the present utility model;

[0020] Figure 4 is the external structure diagram of an optional implementation manner of the test tooling for the energy storage battery pack of the present utility model;

[0021] Wherein: 1. Circuit module; 2. Box body; 3. Box door; 4. Bottom wheels; 5. Expansion board; 6. Display screen. Detailed Embodiment

[0022] Now, the present utility model will be further described in detail with reference to the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0023] A test tooling for an energy storage battery pack, as Figure 2 shown, includes a circuit module 1, and the circuit module 1 includes

[0024] an AC-DC conversion system for converting alternating current into direct current or converting direct current into alternating current; specifically, in an optional implementation manner, the AC-DC conversion system adopts an energy storage converter PCS or a bidirectional ACDC rectifier;

[0025] a DC-DC conversion system (DCDC) for converting high-voltage direct current into low-voltage direct current or converting low-voltage direct current into high-voltage direct current;

[0026] The AC side of the AC-DC conversion system is used to connect to the power grid. The DC side of the AC-DC conversion system is connected to the high-voltage side of the DC-DC conversion system, and the low-voltage side of the DC-DC conversion system is used to connect to the battery pack (PACK).

[0027] The circuit module 1 further includes a monitoring module, and the monitoring module monitors the working information of the AC-DC conversion system, the DC-DC conversion system, and the battery pack.

[0028] Taking the battery pack as the object to be measured, during the battery pack charging test, the power grid outputs alternating current, which is converted into a relatively high direct current voltage such as 600 VDC by the AC-DC conversion system, and then stepped down by the DC-DC conversion system, for example, stepping down 600 VDC to 153.6 VDC to realize the battery pack charging process.

[0029] During the battery pack discharging test, the battery pack outputs low-voltage direct current, such as 153.6 VDC, and then is stepped up by the DC-DC conversion system, for example, stepped up to 600 VDC to be converted into a relatively high direct current, and then through the DC-AC conversion function of the AC-DC conversion system, the energy of the battery pack is fed back to the power grid and can be used by other loads in the power grid.

[0030] By connecting the battery pack through the AC-DC conversion system combined with the DC-DC conversion system, it can be adapted to battery packs with a variety of different voltage specifications, and does not use the discharge resistor in the prior art, and does not require a separate cooling device for the discharge resistor. By obtaining the working information of the AC-DC conversion system, the DC-DC conversion system, and the battery pack through the monitoring module, the information of the battery pack during the charging test or the discharging test can be obtained. The test tooling structure of the energy storage battery pack of the present utility model is simple, easy to operate and view, not easy to cause personal injury, and since the heat source of the discharge resistor is removed, the tooling is not easy to be damaged.

[0031] Specifically, in an optional implementation manner, a circuit breaker QF01 is connected between the AC side of the AC-DC conversion system and the power grid; a circuit breaker QF02 is connected between the DC side of the AC-DC conversion system and the high-voltage side of the DC-DC conversion system; a circuit breaker QF03 is connected between the low-voltage side of the DC-DC conversion system and the battery pack.

[0032] Specifically, in an optional implementation manner, the AC-DC conversion system is internally provided with a first power module for obtaining its own power; and / or, the DC-DC conversion system is internally provided with a second power module for obtaining its own power; the monitoring module obtains the information of the first power module and / or the information of the second power module. By obtaining the information of the first power module or the second power module, the working power of the AC-DC conversion system or the DC-DC conversion system can be monitored in real time, and further the power performance of the battery pack can be monitored.

[0033] Specifically, in an alternative embodiment, the battery pack is internally provided with a voltage acquisition module for acquiring its own voltage information, a current acquisition module for acquiring its own current information, and a temperature acquisition module for acquiring its own temperature information, and the monitoring module acquires the information of the voltage acquisition module, the current acquisition module, and the temperature acquisition module.

[0034] Specifically, in an alternative embodiment, as Figure 3 shown, the DC-to-DC conversion system includes a polarized capacitor C1, a polarized capacitor C2, an inductor L, a triode S1, a triode S2, a diode D1, and a diode D2. The positive pole of the polarized capacitor C1 is connected to the collector of the triode S1 and the emitter of the triode S2 after being connected in series with the inductor L. The collector of the triode S2 is connected to the positive pole of the polarized capacitor C2, and the negative pole of the polarized capacitor C2 is connected to the emitter of the triode S1 and the negative pole of the polarized capacitor C1. The positive pole of the diode D1 is connected to the emitter of the triode S2, and the negative pole of the diode D1 is connected to the collector of the triode S2. The positive pole of the diode D2 is connected to the emitter of the triode S1, and the negative pole of the diode D2 is connected to the collector of the triode S1. Both ends of the polarized capacitor C1 are led out as the low-voltage side of the DC-to-DC conversion system, and both ends of the polarized capacitor C2 are led out as the high-voltage side of the DC-to-DC conversion system. In other alternative embodiments, the DC-to-DC conversion system may also use other forms of DC low-voltage and DC high-voltage conversion circuits.

[0035] Specifically, in an alternative embodiment, as Figure 4 shown, a test tooling for an energy storage battery pack includes a control box. The control box includes a box body 2, a box door 3, and bottom wheels 4. The circuit module 1 is installed inside the box body 2. The box door 3 is provided with a display screen window, and a display screen 6 is installed at the display screen window. The display screen 6 is connected to the monitoring module in the circuit module 1. Specifically, in an alternative embodiment, an expansion board 5 for placing a mouse and a keyboard is provided on the outer side of the box door 3, and the mouse and the keyboard are connected to the monitoring module in the circuit module 1. Installing the circuit module 1 inside the box body 2 of the control box facilitates mobile testing.

[0036] What is described in the above specification is only the specific embodiments of the present invention. Various examples do not constitute a limitation to the essence of the present invention. Those of ordinary skill in the technical field can modify or deform the above-described specific embodiments after reading the specification without departing from the essence and scope of the invention.

Claims

1. A test fixture for an energy storage battery pack, characterized in that: It comprises a circuit module (1), wherein the circuit module (1) comprises AC / DC conversion system, used to convert AC into DC or vice versa; DC to DC conversion system, used to convert DC high voltage into DC low voltage or vice versa; The AC side of the AC-DC conversion system is used to connect to the power grid, the DC side of the AC-DC conversion system is connected to the high voltage side of the DC-DC conversion system, and the low voltage side of the DC-DC conversion system is used to connect to the battery pack; The circuit module (1) further comprises a monitoring module, which monitors the operating information of the AC-DC conversion system, the DC-DC conversion system and the battery pack.

2. The test fixture for an energy storage battery pack according to claim 1, characterized in that: A circuit breaker QF01 is connected between the AC side of the AC-DC conversion system and the power grid; a circuit breaker QF02 is connected between the DC side of the AC-DC conversion system and the high-voltage side of the DC-to-DC conversion system; and a circuit breaker QF03 is connected between the low-voltage side of the DC-to-DC conversion system and the battery pack.

3. The test fixture for an energy storage battery pack according to claim 1, characterized in that: The AC-DC conversion system has a built-in first power module for obtaining its own power; and / or the DC-DC conversion system has a built-in second power module for obtaining its own power; the monitoring module obtains information of the first power module and / or information of the second power module.

4. The test fixture for an energy storage battery pack according to claim 1, characterized in that: The battery pack has a built-in voltage acquisition module for acquiring its own voltage information, a current acquisition module for acquiring its own current information, and a temperature acquisition module for acquiring its own temperature information. The monitoring module acquires information from the voltage acquisition module, the current acquisition module, and the temperature acquisition module.

5. A test fixture for an energy storage battery pack according to any one of claims 1 to 4, characterized in that: The DC-to-DC conversion system includes a polar capacitor C1, a polar capacitor C2, an inductor L, a transistor S1, a transistor S2, a diode D1, and a diode D2. The positive electrode of the polar capacitor C1 is connected in series with the inductor L and then connected to the collector of the transistor S1 and the emitter of the transistor S2. The collector of the transistor S2 is connected to the positive electrode of the polar capacitor C2, and the negative electrode of the polar capacitor C2 is connected to the emitter of the transistor S1 and the negative electrode of the polar capacitor C1; the positive electrode of the diode D1 is connected to the emitter of the transistor S2, and the negative electrode of the diode D1 is connected to the collector of the transistor S2; the positive electrode of the diode D2 is connected to the emitter of the transistor S1, and the negative electrode of the diode D2 is connected to the collector of the transistor S1; the two ends of the polar capacitor C1 are connected as the low-voltage side of the DC-to-DC conversion system, and the two ends of the polar capacitor C2 are connected as the high-voltage side of the DC-to-DC conversion system.

6. A test tool for an energy storage battery pack according to any one of claims 1 to 4, characterized in that: The invention comprises a control box, wherein the control box comprises a box body (2), a box door (3), and a bottom wheel (4); the circuit module (1) is installed inside the box body (2); the box door (3) has a display screen window, a display screen (6) is installed at the display screen window, and the display screen (6) is connected to a monitoring module in the circuit module (1).

7. The test fixture for an energy storage battery pack according to claim 6, characterized in that: An expansion board (5) for placing a mouse and a keyboard is arranged on the outer side of the box door (3); the mouse and the keyboard are connected to the monitoring module in the circuit module (1).

8. The test fixture for an energy storage battery pack according to claim 1, characterized in that: The AC / DC conversion system adopts a PCS energy storage converter or a bidirectional ACDC rectifier.

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