Energy storage box with fire extinguishing device detection circuit

Abstract

The utility model discloses an energy storage box with fire extinguishing device detection circuits, which comprises a box body, a battery pack and a fire extinguishing device, the battery pack and the fire extinguishing device are arranged in the box body, the top of a battery of the battery pack is provided with a pressure release valve, the detection circuits are arranged right above the plurality of pressure release valves, and the detection circuits are connected with a starting part of the fire extinguishing device; according to the utility model, the fire extinguishing device in the energy storage box can be started in time by utilizing the detection circuit and the pressure release valve of the battery when the battery is in thermal runaway, so that the safety of the energy storage box and the battery in the energy storage box is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage box fire extinguishing, in particular to an energy storage box with a fire extinguishing device detection circuit. Background Art

[0002] Energy storage is a key supporting technology for energy structure adjustment and power system transformation under the wave of new energy. As a new energy battery, lithium-ion batteries are not only more environmentally friendly but also have better performance. They are widely used in energy storage power stations. Lithium battery container energy storage solutions are widely used in the access and consumption of new energy power generation, realizing distributed power generation and microgrid energy storage, regulating the frequency and voltage of the power system, and providing reliable power supply and power quality in the upgrade and transformation of the distribution system. However, during the storage process, lithium-ion batteries may experience thermal runaway due to the accumulation of heat released by their own chemical reactions or the influence of external heat sources, which seriously affects the safety performance of energy storage power stations. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide an energy storage box with a fire extinguishing device detection circuit to solve the problems raised in the background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an energy storage box with a fire extinguishing device detection circuit, including a box body and a battery pack and a fire extinguishing device arranged in the box body, a pressure relief valve is provided on the top of the battery of the battery pack, and a detection circuit is provided directly above the multiple pressure relief valves, and the detection circuit is connected to the starting component of the fire extinguishing device.

[0005] Preferably, the detection circuit is fixed to the top of the battery of the battery pack through a mounting card.

[0006] Preferably, the fire extinguishing device is an aerosol fire extinguishing device, and the starting component is an electric starter structure.

[0007] Preferably, the starting component includes an electric ignition head in contact with the fire extinguishing agent of the fire extinguishing device, the electric ignition head is connected to the power supply through a starting circuit, the starting circuit is connected in parallel with the detection circuit, and the resistance of the loop where the detection circuit is located is smaller than the resistance of the loop where the starting circuit is located.

[0008] Preferably, the electric ignition head is a bridge ignition head structure.

[0009] Preferably, a booster sheet is fixedly provided on the surface of the detection circuit, and the booster sheet is made of insulating material.

[0010] Beneficial effects of the utility model: the utility model utilizes the detection circuit and the pressure relief valve of the battery itself, and can promptly activate the fire extinguishing device inside the energy storage box when thermal runaway occurs in the battery, thereby effectively ensuring the safety of the energy storage box and the internal battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of an energy storage box with a fire extinguishing device detection circuit;

[0012] Figure 2 It is a schematic diagram of the internal structure of an energy storage box with a fire extinguishing device detection circuit after removing the box body;

[0013] Figure 3 A schematic diagram of the circuit structure for connecting the detection circuit and the starting component;

[0014] Figure 4 for Figure 2 A magnified schematic diagram of the top area of ​​one of the batteries;

[0015] Figure 5 for Figure 4 Schematic diagram of the structure after the detection circuit is set with the booster sheet. DETAILED DESCRIPTION

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] like Figure 1-5 As shown, an energy storage box with a fire extinguishing device detection circuit includes a box body 1 and a battery pack 2 and a fire extinguishing device arranged in the box body 1. A pressure relief valve 3 is provided on the top of the battery of the battery pack 2, and a detection circuit 4 is provided directly above the multiple pressure relief valves 3. The detection circuit 4 is connected to the starting component of the fire extinguishing device.

[0018] Preferably, the detection circuit 4 is fixed to the top of the battery of the battery pack 2 by means of the mounting card 4.1. With such a design, the detection circuit 4 can be fixed by means of the mounting card 4.1 to prevent it from moving. In addition, when the pressure relief valve 3 releases gas to impact the detection circuit 4, the mounting card 4.1 acts as a limiter for the detection circuit 4, which is more conducive to the process in which the detection circuit 4 is impacted and broken.

[0019] Preferably, the fire extinguishing device is an aerosol fire extinguishing device, and the starting component is an electric starter structure. In this embodiment, the fire extinguishing agent of the aerosol fire extinguishing device is an aerosol generating agent, which contacts the end of the starting component.

[0020] Preferably, the starting component includes an electric ignition head 5 in contact with the extinguishing agent of the fire extinguishing device, the electric ignition head 5 is connected to the power supply 7 through the starting circuit 6, the starting circuit 6 is connected in parallel with the detection circuit 4, and the resistance of the circuit where the detection circuit 4 is located is less than the resistance of the circuit where the starting circuit 6 is located. When the battery in the battery pack 2 is working normally, at this time, since the starting circuit 6 is connected in parallel with the detection circuit 4, and the resistance of the circuit where the detection circuit 4 is located is less than the resistance of the circuit where the starting circuit 6 is located, most of the current passes through the detection circuit 4, and a small part of the current passes through the starting circuit 6. This small part of the current is not enough to make the electric ignition head 5 work, and the fire extinguishing device will not be started at this time; and when the battery in the battery pack 2 has a thermal runaway phenomenon, the pressure relief valve 3 will automatically open and timely release the combustible gas generated inside the battery, and the detection circuit 4 will be broken after being impacted by the gas, so that the detection circuit 4 is in a circuit-breaking state, and at this time, all the current passes through the starting circuit 6, so that the electric ignition head 5 can work, thereby starting the fire extinguishing device.

[0021] Preferably, the electric ignition head 5 is a bridge ignition head structure. A bridge ignition head has a heating bridge wire connected between two ignition wires, which generates heat by passing a certain current, and then provides heat to the fire extinguishing agent (aerosol generating agent) in contact with the end to achieve the starting effect.

[0022] Preferably, a booster sheet 8 is fixedly provided on the surface of the detection circuit 4, and the booster sheet 8 is made of insulating material. Since the surface area of ​​the detection circuit 4 itself is relatively small, the booster sheet 8 can expand the contact area between the detection circuit 4 and the impact gas, thereby making it easier to break the detection circuit 4 and ensure the success of the fire extinguishing device.

[0023] The working principle of this embodiment is as follows:

[0024] like Figure 1 As shown, when the batteries of the battery pack 2 in the box 1 are working normally, at this time, since the starting circuit 6 is connected in parallel with the detection circuit 4, and the resistance of the loop where the detection circuit 4 is located is smaller than the resistance of the loop where the starting circuit 6 is located, most of the current passes through the detection circuit 4, and a small part of the current passes through the starting circuit 6. This small part of the current is not enough to make the electric ignition head 5 work, and the fire extinguishing device will not be started at this time; and when the battery in the battery pack 2 has a thermal runaway phenomenon, the pressure relief valve 3 will automatically open and discharge the flammable gas generated inside the battery in time, and the detection circuit 4 will break after being impacted by the gas, so that the detection circuit 4 is in an open circuit state. At this time, all the current passes through the starting circuit 6, so that the electric ignition head 5 can work, ignite the fire extinguishing agent in the fire extinguishing device, and finally start the fire extinguishing device. The generated fire extinguishing substance extinguishes the battery in thermal runaway.

[0025] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An energy storage box with a fire extinguishing device detection circuit, comprising a box body (1), a battery pack (2) and a fire extinguishing device arranged in the box body (1), a pressure relief valve (3) being arranged on the top of the battery of the battery pack (2), characterized in that: A detection circuit (4) is provided directly above each of the plurality of pressure relief valves (3), and the detection circuit (4) is connected to a starting component of a fire extinguishing device; the fire extinguishing device is an aerosol fire extinguishing device, and the starting component is an electric starter structure; a booster sheet (8) is also fixedly provided on the surface of the detection circuit (4), and the booster sheet (8) is made of an insulating material.

2. An energy storage box with a fire extinguishing device detection circuit according to claim 1, characterized in that: The detection circuit (4) is fixed to the top of the battery of the battery pack (2) via a mounting card (4.1).

3. The energy storage box with a fire extinguishing device detection circuit according to claim 1, characterized in that: The starting component comprises an electric ignition head (5) in contact with the fire extinguishing agent of the fire extinguishing device, the electric ignition head (5) being connected to a power source (7) via a starting circuit (6), the starting circuit (6) being connected in parallel with a detection circuit (4), and the resistance of the circuit in which the detection circuit (4) is located is smaller than the resistance of the circuit in which the starting circuit (6) is located.

4. An energy storage box with a fire extinguishing device detection circuit according to claim 3, characterized in that: The electric ignition head (5) is a bridge ignition head structure.

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