Energy storage battery pack structure capable of rapidly cutting off faulty battery

Abstract

The energy storage battery pack structure capable of automatically detecting and rapidly cutting off the fault batteries comprises a battery fixing frame, the battery fixing frame is provided with a battery fixing platform, and the battery fixing platform is provided with opening and closing plates corresponding to the batteries; each battery is correspondingly provided with a detection piece, and the detection piece at least comprises a temperature detection sensor; a cooling pool is arranged below the battery fixing platform and is filled with a completely insulated cooling liquid; the battery fixing platform is connected with the battery management system and is controlled by the battery management system, the detection part is used as a real-time detection execution part, and when the battery management system monitors abnormal temperature induction, the battery management system controls the opening and closing plate to be opened after the temperature of the battery with the current abnormal temperature exceeds a preset temperature threshold value; and the battery with abnormal temperature directly falls into the cooling liquid pool below to be cooled, so that the fault battery is quickly cooled, and the possibility of damaging other batteries or equipment in the battery pack due to abnormal discharge of the fault battery is also prevented.

Description

Technical Field

[0001] This invention relates to new energy storage systems, and particularly to battery pack application technology. Specifically, it relates to an energy storage battery pack structure that can automatically detect and quickly disconnect faulty batteries. Background Technology

[0002] Against the backdrop of the rapid development of new energy storage systems, the thermal safety management of battery packs, as the core energy carrier, has become a key area for technological breakthroughs in the industry.

[0003] Currently, mainstream energy storage battery systems generally have three types of safety hazards: 1) The thermal runaway response is lagging. Traditional air-cooled / liquid-cooled systems are unable to effectively suppress the temperature rise when the internal heat generation rate of the battery exceeds 20°C / min, leading to thermal propagation. 2) Multi-level protection failure: The existing BMS relies on voltage / temperature threshold triggering for fault judgment, and there is a 300-500ms delay from detecting the abnormality to executing the power cut-off. 3) The limitations of passive protection: mechanical protection devices such as explosion-proof valves can only mitigate the damage after thermal runaway occurs, and cannot prevent it in advance.

[0004] Analysis of numerous energy storage power station fire accidents shows that 83% of the cases stemmed from the failure to isolate a single battery module malfunction in a timely manner.

[0005] Therefore, it is necessary to provide an energy storage battery pack structure that can automatically detect and quickly disconnect faulty batteries to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an energy storage battery pack structure that automatically detects and quickly disconnects faulty batteries. This battery pack system can respond quickly and instantly disconnect faulty batteries, thus minimizing further losses to the power station due to faulty batteries when personnel cannot arrive on site in time.

[0007] The technical solution is as follows: An energy storage battery pack structure with automatic detection and rapid disconnection of faulty batteries includes a battery mounting frame with a battery mounting platform for loading the battery pack. The battery pack is formed by combining several batteries, and the batteries are fixed on a platform, with an opening and closing plate for each battery. Each battery is equipped with a detection device, which includes at least a temperature sensor. A cooling pool is installed below the battery mounting platform, and the cooling pool is filled with a completely insulated coolant. The battery mounting platform is connected to and controlled by the battery management system. The detection device is used as a real-time detection actuator. When the battery management system detects an abnormal temperature among several batteries, if the temperature of the battery with the abnormal temperature exceeds the preset temperature threshold, the battery management system controls the opening and closing plate to open. The battery with the abnormal temperature falls directly into the coolant pool below for cooling. This quickly cools the faulty battery and also prevents the abnormal discharge of the faulty battery from damaging other batteries or equipment in the battery pack.

[0008] Furthermore, the coolant is a fluorinated liquid.

[0009] Furthermore, the battery pack includes battery strands corresponding to a number of batteries, which are mounted on an integrated battery series cover and are connected to the battery cells through elastic contact.

[0010] Furthermore, the battery pack has a positive terminal, a negative terminal, a positive DC cable, a negative DC cable, and a battery coolant circulation pipeline.

[0011] Furthermore, the battery coolant circulation pipeline includes a coolant inlet pipe and a coolant outlet pipe connected to the cooling pool.

[0012] Furthermore, the battery holder is equipped with an anti-misinstallation slot structure that corresponds to the groove on the battery, preventing installers from reversing the positive and negative polarities of the battery during installation.

[0013] Furthermore, the battery fixing platform has a closed enclosure, an integrated battery series cover plate, and a sealing element between the closed enclosure and the battery fixing platform. The battery fixing platform, the closed enclosure, and the integrated battery series cover plate form a sealed battery housing.

[0014] Compared with existing technologies, the present invention can respond quickly and instantly disconnect the battery pack system of the faulty battery, and can prevent further losses to the power station due to the faulty battery to the greatest extent possible when the staff cannot arrive on site in time. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention.

[0016] Figure 2 This is a top view of the present invention.

[0017] Figure 3 This is a schematic diagram of the battery cooling process during its descent according to the present invention.

[0018] Figure 4 This is a schematic diagram of the battery structure. Detailed Implementation Example

[0019] Please see Figure 1-4 This embodiment demonstrates an energy storage battery pack structure that automatically detects and quickly disconnects faulty batteries, including a battery mounting frame 1, a battery mounting platform 2 on the battery mounting frame 1, and a battery mounting platform for loading a battery pack 3. The battery pack 3 is formed by combining several batteries 4, and an opening and closing plate 20 is provided on the battery fixing platform 2 for each battery 4. Each battery 4 is equipped with a detection element, which includes at least a temperature detection sensor; A cooling pool 5 is provided below the battery fixing platform 2, and the cooling pool 5 is filled with a completely insulated coolant; The battery fixing platform 2 is connected to and controlled by the battery management system. The detection device is used as a real-time detection execution device. When the battery management system detects an abnormal temperature among the batteries 4, the battery management system controls the opening and closing plate to open when the temperature of the battery 4 with the abnormal temperature exceeds the preset temperature threshold. The battery 4 with the abnormal temperature falls directly into the coolant pool 5 below for cooling. This quickly cools the faulty battery and also prevents the abnormal discharge of the faulty battery from damaging other batteries or equipment in the battery pack.

[0020] The coolant is a fluorinated liquid.

[0021] The battery pack 3 includes battery strips 31 arranged corresponding to a plurality of batteries 4. The battery strips 31 are arranged on an integrated battery series cover plate 30 and are connected to the battery 4 via elastic contact.

[0022] The battery pack 3 has a positive terminal 32, a negative terminal 33, a positive DC cable 34, a negative DC cable 35, and a battery coolant circulation pipeline.

[0023] The battery coolant circulation pipeline includes a coolant inlet pipe 36 and a coolant outlet pipe 37 connected to the cooling pool.

[0024] The battery holder 1 is equipped with an anti-misinstallation slot structure that corresponds to the groove 41 on the battery 4, so as to prevent the installer from reversing the positive and negative polarities of the battery during installation.

[0025] The battery fixing platform 2 has a closed enclosure 21, an integrated battery series cover 30, and a sealing element between the closed enclosure 21 and the battery fixing platform 21. The battery fixing platform 2, the closed enclosure, and the integrated battery series cover 30 form a sealed battery box.

[0026] Compared with existing technologies, the present invention can respond quickly and instantly disconnect the battery pack system of the faulty battery, and can prevent further losses to the power station due to the faulty battery to the greatest extent possible when the staff cannot arrive on site in time.

[0027] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this invention, and these all fall within the protection scope of this invention.

Claims

1. A storage battery pack structure with automatic detection and quick disconnection of a faulty battery, characterized by: The battery fixing frame is provided with a battery fixing platform for loading a battery pack. The battery pack is formed by a plurality of batteries, and the battery fixing platform is provided with an opening and closing plate corresponding to each battery. Each battery is provided with a detection member, which at least includes a temperature detection sensor. A cooling pool is arranged below the battery fixing platform, and the cooling pool is filled with completely insulated cooling liquid. The battery fixing platform is connected with a battery management system and is controlled by the battery management system.

2. The energy storage battery pack structure with automatic detection and quick disconnection of faulty batteries according to claim 1, characterized in that: The detection member is used for real-time detection.

3. The energy storage battery pack structure with automatic detection and quick disconnection of faulty batteries according to claim 1, characterized in that: If the battery management system detects an abnormal temperature in the plurality of batteries, the battery management system controls the opening and closing plate to open when the temperature of the battery with the abnormal temperature exceeds a preset temperature threshold.

4. The energy storage battery pack structure with automatic detection and quick disconnection of faulty batteries according to claim 1, characterized in that: The battery with the abnormal temperature directly falls into the cooling pool below for cooling.

5. The energy storage battery pack structure with automatic detection and quick disconnection of faulty batteries according to claim 1, characterized in that: The quick cooling of the faulty battery prevents the possibility of damage to other batteries or equipment in the battery pack caused by abnormal discharge of the faulty battery.

6. The energy storage battery pack structure with automatic detection and quick disconnection of faulty batteries according to claim 5, characterized in that: The cooling liquid is fluorinated liquid.

7. The energy storage battery pack structure with automatic detection and quick cut-off of faulty batteries according to any one of claims 1-6, characterized in that: The battery pack is provided with a battery string sheet corresponding to a plurality of batteries. The battery string sheet is arranged on an integrated battery series cover plate and is connected with the battery through elastic contact. The battery pack is provided with a positive terminal, a negative terminal, a positive DC cable, a negative DC cable, and a battery cooling liquid circulation pipeline. The battery cooling liquid circulation pipeline includes a cooling liquid inlet pipe and a cooling liquid outlet pipe. The battery fixing frame is provided with an anti-misinstallation slot structure corresponding to a groove on the battery to avoid the phenomenon of reverse polarity of the battery during installation. The battery fixing platform is provided with a closed fence, and the integrated battery series cover plate and the closed fence are provided with a sealing member. The battery fixing platform, the closed fence, and the integrated battery series cover plate form a battery sealed box body through fastening bolts.

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