Battery PACK box

Abstract

The utility model discloses a battery PACK box which comprises a box body, battery modules, a positive pole and a negative pole, the box body is provided with an air inlet channel and an air outlet channel, the air inlet channel and the air outlet channel are respectively communicated with the interior of a cavity, and the position of the air outlet channel is higher than the positions of the battery modules, the positive pole and the negative pole; according to the utility model, the design structure is reasonable, the air inlet channel and the air outlet channel are arranged, the air outlet channel is arranged at the upper part, the arc extinguishing gas filled in the air inlet channel can be used for filling the air inlet channel, and the air outlet channel is arranged at the lower part of the air outlet channel. Therefore, the arc extinguishing gas covers the joints of the modules and the positive and negative pole columns, the arc extinguishing effect in the box body is achieved, meanwhile, the box body is prevented from being damaged, and the problems of structural deformation or gas leakage after the box body is pressed caused by imbalance of internal and external pressure after the existing box body is filled with the gas are solved. Therefore, the problem of safety accidents caused by the fact that gas cannot carry out effective arc extinguishing is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery boxes, in particular to a battery PACK box. Background Art

[0002] The battery PACK box is the smallest distribution unit of the energy storage cabinet. Because it inputs and outputs high-voltage direct current in energy storage applications, safety is particularly important. Each battery PACK box is usually composed of an upper cover and a lower base. The cells between the internal battery modules are connected to each other through aluminum bars, and the modules are connected to the positive and negative poles through overlapping copper bars. For safety, the BMU (battery management unit), wiring harness, and temperature sensor will be used to collect the temperature and voltage of each cell. When the temperature is too high, the fire port will be activated to spray perfluoroacetone gas to extinguish the fire.

[0003] At present, the energy storage and power battery industries mainly use insulating films, mica, epoxy resins and other arc extinguishing methods, which not only have high requirements on space and production processes, but also are prone to the hidden danger of insufficient creepage distance. Although arc extinguishing is performed by filling some arc extinguishing gases such as SF6 and nitrogen into the box, the box will maintain a certain pressure after being filled with arc extinguishing gas, and the pressure inside the box remains relatively unchanged when the external environment changes, which is prone to internal and external pressure imbalance, resulting in structural deformation or gas leakage after the box is compressed, so that the gas cannot effectively extinguish the arc, causing safety accidents, resulting in personal safety and property losses. For this reason, we provide battery PACK boxes to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and provide a battery PACK box.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A battery PACK box, comprising a box body, the outer wall of the box body is provided with positive and negative poles, a containing chamber is provided in the box body, one end of the positive and negative poles penetrates the box body and extends to the inside of the chamber, a plurality of battery modules are provided in the chamber, and the plurality of battery modules are connected to the positive and negative poles, an air inlet channel and an air outlet channel are opened on the box body, the air inlet channel and the air outlet channel are respectively connected to the chamber, a control component is provided in the air inlet channel and the air outlet channel, and the control component is used for the circulation of gas between the containing chamber and the outside; the position of the air outlet channel is higher than the positions of the plurality of battery modules and the positive and negative poles;

[0007] The accommodating chamber is filled with arc-extinguishing gas, and the space where the arc-extinguishing gas is located at least covers the connection between the battery module and the positive and negative poles.

[0008] Furthermore, the arc-extinguishing gas has a density greater than that of the air arc-extinguishing gas.

[0009] Furthermore, the arc extinguishing gas is SF6.

[0010] Furthermore, the control component is a one-way valve.

[0011] Furthermore, the box body includes an upper cover shell, a lower cover base is provided at the bottom of the upper cover shell, and the upper cover shell and the lower cover base together form a containing chamber;

[0012] The air inlet channel and the air outlet channel are respectively located on the outer wall of the upper cover shell; the battery module is installed on the top of the lower cover base.

[0013] Furthermore, the lower cover base is a water cooling plate base.

[0014] Furthermore, the air inlet channel is located near the bottom of the box body, and the air outlet channel is located at a position higher than the air inlet channel.

[0015] Furthermore, a gas density detector is installed in the accommodating chamber to detect the gas density inside the box.

[0016] Compared with the prior art, the battery PACK box has the following beneficial effects:

[0017] 1. The utility model provides an air inlet channel and an air outlet channel on the box body, with the air outlet channel located at the top, and then uses the arc-extinguishing gas filled in the air inlet channel to cover the module and the connection between the positive and negative poles, thereby playing the role of extinguishing the arc in the box body while avoiding damage to the box body. It solves the problem that after the existing box body is filled with gas, it is easy to have an imbalance of internal and external pressures, which leads to structural deformation or gas leakage after the box body is compressed, so that the gas cannot effectively extinguish the arc and cause safety accidents.

[0018] 2. The utility model adopts a water-cooled plate base through the lower cover base, and the air inlet channel is located on the side of the upper cover shell close to the water-cooled plate base, so as to facilitate air intake from below and discharge through the air outlet channel, so as to facilitate heat dissipation treatment of the module inside the box and improve the heat dissipation effect. At the same time, a gas density detector is installed at the position of the air outlet channel to detect the gas density inside the box, so as to prompt the staff to timely detect the air tightness and replenish SF6 gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the interior of the box in the utility model.

[0021] In the figure: 1. Upper cover shell; 2. Water cooling plate base; 3. Battery module; 4. BMU assembly; 5. Fire protection port; 6. Positive and negative poles; 7. One-way air inlet valve; 8. One-way exhaust valve; 9. Gas density detector. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-2 As shown, the utility model provides a technical solution: a battery PACK box, including a box body, the outer wall of the box body is provided with positive and negative poles 6, a containing chamber is provided in the box body, one end of the positive and negative poles 6 passes through the box body and extends to the inside of the chamber, a plurality of battery modules 3 are provided in the chamber, and the plurality of battery modules 3 are connected to one end of the positive and negative poles 6 by overlapping copper wires;

[0024] The outer wall of the box is connected with an air inlet channel and an air outlet channel, one end of the air inlet channel and the air outlet channel are connected with the chamber, and control components are arranged in the air inlet channel and the air outlet channel, and the control components are used to limit the flow of gas; the position of the air outlet channel is higher than the overlapping copper wires between several battery modules 3 and the positions of the positive and negative poles 6; the accommodating chamber is filled with arc extinguishing gas, and the space where the arc extinguishing gas is located at least covers the arc extinguishing gas at the connection between the battery module 3 and the positive and negative poles 6.

[0025] The arc extinguishing gas is SF6 gas; the control components are one-way valves, namely a one-way air inlet valve 7 and a one-way air outlet valve 8, the one-way air inlet valve 7 is installed in the air inlet channel, and the one-way air outlet valve 8 is installed in the air outlet channel; in use, since the density of SF6 6.139g / L is higher than that of N2 (nitrogen) 259g / L and O2 (oxygen) 429g / L, a one-way air outlet valve 8 is added in the upper left corner of the box body, so that after the external air pressure changes, the internal gas with a lower density than SF6 gas is discharged from the top through the one-way air outlet valve 8, and at the same time, N2 and O2 account for 99% of the air. Therefore, most of the SF6 gas is still in the box body, extinguishing the arc by absorbing and consuming the arc energy, and keeping consistent with the annual average air pressure of the ground, so as to avoid structural deformation or gas leakage after the box body is compressed due to imbalance of internal and external pressures.

[0026] The box body includes an upper cover shell 1, and a lower cover base is arranged at the bottom of the upper cover shell 1, and the upper cover shell 1 and the lower cover base together constitute a accommodating chamber; the air inlet channel and the air outlet channel are respectively located on the outer wall of the upper cover shell 1; the battery module 3 is installed on the top of the lower cover base; the upper cover shell 1 and the lower cover base are sealed and connected in a detachable manner, and sealing components such as sealing rings are arranged between them to maintain the seal. When in use, the box body can be opened conveniently through the detachability between the upper cover shell 1 and the lower cover base, and then the internal battery module 3 and other components can be repaired and replaced.

[0027] The base of the lower cover is a water-cooled plate base 2, and the top of the water-cooled plate base 2 is connected to the battery module 3; an insulating medium is used in the water-cooled plate to cool the battery module 3 and the gas in the box body, thereby improving the heat dissipation effect of the box body, and the air inlet channel is located on the side close to the bottom of the box body; when in use, the air inlet channel is located at the bottom and the air outlet channel is located at the top, so that the external gas enters the interior through the position below close to the water-cooled plate base 2, moves upward after being cooled by the water-cooled plate base 2, and is finally discharged at the air outlet channel, thereby further improving its heat dissipation effect.

[0028] A fire port 5 is provided on the outer wall of the upper cover shell 1 for connecting external fire-fighting equipment. A BMU component 4 is provided on the upper cover shell 1; the BMU component 4 is a battery management unit, which is used to collect parameters such as the temperature of the battery module 3, monitor, control and protect the operating status of the battery pack, and prevent the battery pack from being damaged or causing a fire. When the temperature is too high, the staff starts the fire-fighting equipment corresponding to the fire port 5 based on the data of the BMU component 4, and sprays perfluoroacetone gas through the fire port 5 to extinguish the fire.

[0029] A gas density detector 9 is installed at one end of the gas outlet channel to detect the gas density inside the box. The gas density detector 9 adopts a micro detector, which is connected to an external terminal device. When in use, the gas density inside the box is detected by the gas density detector 9. When the internal density is detected to be lower than the set value, the external terminal device reminds the staff to detect the air tightness of the PACK based on the received signal to determine whether SF6 gas needs to be supplemented to ensure the long-term safe operation of the equipment.

[0030] A tilt sensor is also installed on the box, which is connected to an external terminal device. The staff judges the state of the arc-extinguishing gas in the box based on the tilt of the box detected by the tilt sensor, and determines whether it is necessary to adjust the box posture or replenish the arc-extinguishing gas.

Claims

1. A battery PACK box, comprising a box body, wherein the outer wall of the box body is provided with positive and negative poles (6), wherein a receiving chamber is provided in the box body, wherein one end of the positive and negative poles (6) penetrates the box body and extends to the inside of the chamber, wherein a plurality of battery modules (3) are provided in the chamber, wherein the plurality of battery modules (3) are connected to the positive and negative poles (6), wherein: The box body is provided with an air inlet channel and an air outlet channel, the air inlet channel and the air outlet channel are respectively connected to the chamber, and the air inlet channel and the air outlet channel are both provided with a control component, the control component is used to accommodate the flow of gas between the chamber and the outside; the position of the air outlet channel is higher than the position of the plurality of battery modules (3) and the positive and negative poles (6); The accommodating chamber is filled with arc-extinguishing gas, and the space where the arc-extinguishing gas is located at least covers the connection between the battery module (3) and the positive and negative poles (6).

2. The battery PACK box according to claim 1, characterized in that: The arc-extinguishing gas has a density greater than that of air.

3. The battery PACK box according to claim 2, characterized in that: The arc extinguishing gas is SF6.

4. The battery PACK box according to claim 1, characterized in that: The control component is a one-way valve.

5. The battery PACK box according to claim 1, characterized in that: The box body comprises an upper cover shell (1), a lower cover base is arranged at the bottom of the upper cover shell (1), and the upper cover shell (1) and the lower cover base together form a containing chamber; The air inlet channel and the air outlet channel are respectively located on the outer wall of the upper cover shell (1); and the battery module (3) is installed on the top of the lower cover base.

6. The battery PACK box according to claim 5, characterized in that: The lower cover base is a water cooling plate base (2).

7. The battery PACK box according to claim 1, characterized in that: The air inlet channel is located near the bottom of the box body, and the air outlet channel is located at a position higher than the air inlet channel.

8. The battery PACK box according to claim 1, characterized in that: A gas density detector (9) is installed in the accommodating chamber and is used to detect the gas density inside the box.

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