Explosion-proof mechanism for battery pack of liquid cooling energy storage cabinet

Abstract

The utility model discloses an explosion-proof mechanism of a liquid cooling energy storage cabinet battery pack, which comprises a battery pack, an explosion-proof structure, a battery limiting structure, a gas conveying structure and a gas discharging structure, and is characterized in that the battery pack comprises a liquid cooling plate and a shell fixedly arranged on the upper surface of the liquid cooling plate through a fastener; and the explosion-proof structure comprises a gas discharge structure and a gas conveying structure which are respectively arranged on the surface of the shell. Compared with the prior art, the device can drive the induction assembly to control the external control unit to send a signal to the air pump in the exhaust process by utilizing the exhaust valve, so that inert gas in the air tank can be pumped into the battery pack by utilizing the air pump, and on one hand, explosion of the battery pack can be inhibited by utilizing the inert gas; on the other hand, the inert gas can be fully filled in the battery pack, so that high-temperature and high-pressure gas in the battery pack is quickly discharged from the exhaust valve, the high-temperature and high-pressure gas is prevented from being massively remained in the battery pack, and the risk of explosion of the battery pack is further reduced.

Description

Technical Field

[0001] The utility model relates to the field of energy storage equipment, in particular to an explosion-proof mechanism for a battery pack of a liquid-cooled energy storage cabinet. Background Art

[0002] The liquid-cooled energy storage cabinet battery pack consists of an outer shell, a liquid-cooled heat sink and a battery arranged inside the outer shell. When working, the battery will emit flammable gases such as hydrogen. Most liquid-cooled energy storage cabinet battery packs will be equipped with explosion-proof valves on the outer shell to protect the battery pack from explosion. Its working principle is to collect battery temperature, pressure and other parameters through sensors. When the temperature or pressure inside the battery reaches a certain level, the explosion-proof valve will automatically open and release the high-pressure gas inside the outer shell to the outside to prevent high temperature or high pressure from causing battery explosion.

[0003] However, the existing explosion-proof valve can only release the high-pressure gas inside the shell to the outside unilaterally, and the high-temperature flammable gas in the shell cannot be completely dissipated by relying on the pressure release, which will still cause the battery pack to explode. In view of the above defects: To this end, we propose an explosion-proof mechanism for a liquid-cooled energy storage cabinet battery pack. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the existing explosion-proof valve in the prior art can only unilaterally release the high-pressure gas inside the battery to the outside, and cannot completely dissipate the high-temperature flammable gas inside the battery by relying on the pressure release of the high-pressure gas, and cannot completely avoid the explosion of the battery pack, and proposes an explosion-proof mechanism for a liquid-cooled energy storage cabinet battery pack.

[0005] In order to solve the problems existing in the prior art, the utility model adopts the following technical solutions: the explosion-proof mechanism of the liquid-cooled energy storage cabinet battery pack includes:

[0006] A battery pack, the battery pack comprising a liquid cooling plate and a shell fixedly mounted on the upper surface of the liquid cooling plate by fasteners;

[0007] An explosion-proof structure, the explosion-proof structure comprising a gas exhaust structure and a gas delivery structure respectively arranged on the surface of the shell;

[0008] A battery limiting structure, the battery limiting structure comprising a limiting frame, a plurality of transverse heat conducting plates and a longitudinal heat conducting plate respectively fixedly mounted on the inner wall of the limiting frame, and a gas guide assembly arranged on the surface of the battery limiting structure;

[0009] A gas delivery structure, the gas delivery structure comprising an air intake pipe fixedly mounted on the surface of the housing, an air intake hard pipe assembled with the air intake pipe through an assembly component, and a fire fighting component connected to the air intake hard pipe;

[0010] The fire-fighting assembly includes an air pump, an air tank, and an air inlet pipe and an air exhaust pipe respectively connected to the air inlet end and the air exhaust end of the air pump;

[0011] A gas emission structure, the gas emission structure includes an exhaust pipe fixedly installed on the surface of the housing, and an exhaust valve arranged on the surface of the exhaust pipe, and a discharge pipe is arranged on the surface of the exhaust valve, and an induction component capable of driving the air pump to work is arranged inside the exhaust valve;

[0012] The exhaust valve includes a valve body, and a valve core slidably connected to the inner wall of the valve body, and a return spring is fixedly installed on one side of the valve core;

[0013] The induction component includes an installation cavity opened on the inner wall of the valve body, two fixed contacts fixedly installed on the inner wall of the installation cavity, a valve rod slidably installed on the inner wall of the installation cavity, and a moving contact fixedly installed on the left end of the valve rod.

[0014] Preferably, one end of the exhaust air pipe is communicated with one end of the intake hard pipe, and the end of the intake air pipe far from the air pump is communicated with the air tank.

[0015] Preferably, the assembly component includes a nut sleeved on the surface of the intake hard pipe, and a limit ring fixedly installed on the surface of the intake hard pipe, and an external thread adapted to the nut is provided on the surface of the intake pipe.

[0016] Preferably, the lower surfaces of the transverse heat conduction plate and the longitudinal heat conduction plate are both fixedly connected to the upper surface of the liquid cooling plate.

[0017] Preferably, the gas diversion component includes a diversion channel opened on the inner wall of the limit frame, a plurality of exhaust holes opened on the inner wall of the limit frame, diversion holes respectively opened on the surfaces of the transverse heat conduction plate and the longitudinal heat conduction plate, and a plug hole opened on the outer surface of the limit frame.

[0018] Preferably, the exhaust holes and the plug holes are both communicated with the inside of the diversion channel, and the plug hole allows the intake hard pipe to be inserted.

[0019] Preferably, one end of the valve rod is fixedly connected to the left end of the valve core, and the return spring is sleeved on the surface of the valve rod.

[0020] Preferably, the fixed contact is electrically connected to an external control unit, and the external control unit can control the opening and closing of the air pump.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] 1. By setting an explosion-proof structure, a gas delivery structure, and a gas discharge structure, when high-temperature and high-pressure gas is generated inside the battery pack, the pressure inside the battery pack will increase at this time, which can push open the valve core and move it to the left, driving the valve core to the left side of the discharge pipe. Therefore, the gas inside the battery pack will be discharged along the discharge pipe. At the same time, when the valve core moves to the left, the valve stem will drive the moving contact to contact the fixed contact at this time, powering on the external control unit and driving the air pump to work. Thus, the inert gas in the gas tank can be pumped into the battery pack by the air pump. Compared with the prior art, this device can drive the induction component to control the external control unit to send a signal to the air pump during the exhaust process by using the exhaust valve, so that the inert gas in the gas tank can be pumped into the battery pack by the air pump. On the one hand, the explosion of the battery pack can be inhibited by the inert gas, and on the other hand, the battery pack can be filled with the inert gas, so that the high-temperature and high-pressure gas inside the battery pack can be quickly discharged from the exhaust valve, avoiding a large amount of high-temperature and high-pressure gas remaining in the battery pack, and further reducing the risk of battery pack explosion.

[0023] 2. By setting a gas diversion component, after assembling the intake hard pipe and the intake pipe into one body, the intake hard pipe will be inserted into the insertion hole at this time. When the inert gas enters the intake hard pipe, the inert gas will be discharged from multiple exhaust holes along the diversion channel respectively, so that the inert gas can quickly fill the battery pack, and the diversion holes can make the air flow between multiple batteries conduct, avoiding the problem that the flammable gas in the battery limiting structure is difficult to disperse. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation. In the drawings:

[0025] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0026] Figure 2 is a top cross-sectional view of the battery limiting structure of the present invention;

[0027] Figure 3 is a front cross-sectional view of the assembly component of the present invention;

[0028] Figure 4 is a front cross-sectional view of the exhaust valve of the present invention;

[0029] Figure 5 is Figure 2 the enlarged view at A in

[0030] Serial numbers in the figure: 1 liquid cooling plate, 2 shell, 3 limit frame, 4 horizontal heat conduction plate, 5 longitudinal heat conduction plate, 6 air inlet pipe, 7 air inlet hard pipe, 8 air pump, 9 gas tank, 10 air inlet pipe, 11 exhaust pipe, 12 exhaust pipe, 13 exhaust pipe, 14 valve body, 15 valve core, 16 return spring, 17 fixed contact, 18 valve stem, 19 moving contact, 20 nut, 21 guide channel, 22 exhaust hole, 23 guide hole, 24 plug hole, 25 limit ring. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] See also Figures 1-5 The utility model provides a technical solution: an explosion-proof mechanism for a liquid-cooled energy storage cabinet battery pack, including: a battery pack, an explosion-proof structure, a battery limiting structure, a gas delivery structure, and a gas exhaust structure.

[0033] The battery pack includes a liquid cooling plate 1 and a housing 2 fixedly mounted on the upper surface of the liquid cooling plate 1 by fasteners.

[0034] The battery limiting structure includes a limiting frame 3, a plurality of transverse heat conducting plates 4 and a longitudinal heat conducting plate 5 respectively fixedly mounted on the inner wall of the limiting frame 3, and a gas guide assembly arranged on the surface of the battery limiting structure. The lower surfaces of the transverse heat conducting plates 4 and the longitudinal heat conducting plates 5 are fixedly connected to the upper surface of the liquid cooling plate 1. The battery can be limited by placing the battery in the cavity between the transverse heat conducting plates 4 and the longitudinal heat conducting plates 5. After that, the outer shell 2 is fixed to the liquid cooling plate 1 as a whole by fasteners. At this time, the battery will be between the liquid cooling plate 1 and the outer shell 2.

[0035] When the battery is in the outer shell 2, the bottom of the battery will contact the liquid cooling plate 1, so that the liquid cooling plate 1 can be used to dissipate heat from the battery, and the side of the battery will contact the transverse heat conducting plate 4 and the longitudinal heat conducting plate 5 respectively, and the transverse heat conducting plate 4 and the longitudinal heat conducting plate 5 will exchange heat with the liquid cooling plate 1, so that the side of the battery can be cooled.

[0036] The explosion-proof structure includes a gas exhaust structure and a gas delivery structure respectively arranged on the surface of the housing 2 .

[0037] The gas delivery structure includes an intake pipe 6 fixedly installed on the surface of the outer shell 2, an intake hard pipe 7 assembled with the intake pipe 6 through an assembly component, and a fire-fighting component communicated with the intake hard pipe 7. The assembly component includes a nut 20 sleeved on the surface of the intake hard pipe 7 and a limit ring 25 fixedly installed on the surface of the intake hard pipe 7. The surface of the intake pipe 6 is provided with an external thread adapted to the nut 20. After inserting the intake hard pipe 7 into the intake pipe 6, the limit ring 25 can prevent the intake hard pipe 7 from being inserted excessively. Then, tighten the nut 20, so that the intake hard pipe 7 and the intake pipe 6 can be assembled into one body.

[0038] The fire-fighting component includes an air pump 8, an air tank 9, an air inlet pipe 10 and an air outlet pipe 11 respectively communicated with the air inlet end and the air outlet end of the air pump 8. One end of the air outlet pipe 11 is communicated with one end of the intake hard pipe 7, and the end of the air inlet pipe 10 far from the air pump 8 is communicated with the air tank 9.

[0039] The gas diversion component includes a diversion channel 21 opened on the inner wall of the limit frame 3, a plurality of exhaust holes 22 opened on the inner wall of the limit frame 3, diversion holes 23 respectively opened on the surfaces of the transverse heat-conducting plate 4 and the longitudinal heat-conducting plate 5, and a socket hole 24 opened on the outer surface of the limit frame 3. The exhaust holes 22 and the socket hole 24 are both communicated with the inside of the diversion channel 21, and the socket hole 24 allows the intake hard pipe 7 to be inserted.

[0040] After the intake hard pipe 7 and the intake pipe 6 are assembled into one body, the intake hard pipe 7 will be inserted into the socket hole 24 at this time. Drive the air pump 8, and use the air pump 8 to draw the inert gas in the air tank 9 into the intake hard pipe 7. Then the inert gas will be discharged from the plurality of exhaust holes 22 along the diversion channel 21 respectively, so that the inert gas can quickly fill the battery pack, and the diversion holes 23 can make the air flow between the plurality of batteries conduct, avoiding the problem that the flammable gas in the battery limit structure is difficult to dissipate.

[0041] The gas discharge structure includes an exhaust pipe 12 fixedly installed on the surface of the outer shell 2 and an exhaust valve arranged on the surface of the exhaust pipe 12. A discharge pipe 13 is arranged on the surface of the exhaust valve, and an induction component for driving the air pump 8 to work is arranged inside the exhaust valve. The exhaust valve includes a valve body 14 and a valve core 15 slidably connected to the inner wall of the valve body 14, and a return spring 16 is fixedly installed on one side of the valve core 15.

[0042] When the high-temperature and high-pressure gas is generated in the battery pack, the pressure in the battery pack will increase at this time, so as to push the valve core 15 to move to the left, driving the valve core 15 to move to the left side of the discharge pipe 13. Therefore, the high-temperature and high-pressure gas in the battery pack will be discharged along the discharge pipe 13.

[0043] The induction component includes an installation cavity formed on the inner wall of the valve body 14, two fixed contact terminals 17 fixedly installed on the inner wall of the installation cavity, a valve rod 18 slidably installed on the inner wall of the installation cavity, and a moving contact terminal 19 fixedly installed at the left end of the valve rod 18. One end of the valve rod 18 is fixedly connected to the left end of the valve core 15, and a return spring 16 is sleeved on the surface of the valve rod 18. The fixed contact terminal 17 is electrically connected to an external control unit, and the external control unit can control the opening and closing of the air pump 8.

[0044] When the valve core 15 moves to the left, at this time the valve rod 18 will drive the moving contact terminal 19 to contact the fixed contact terminal 17, so that the external control unit can be powered on and drive the air pump 8 to work, and then the inert gas in the gas tank 9 can be pumped into the battery pack by the air pump 8.

[0045] Compared with the prior art, this device uses the exhaust valve to drive the induction component to control the external control unit to send a signal to the air pump 8 during the exhaust process, so that the inert gas in the gas tank 9 can be pumped into the battery pack by the air pump 8 working. On the one hand, the inert gas can be used to inhibit the explosion of the battery pack. On the other hand, the inert gas can fill the battery pack, so that the high-temperature and high-pressure gas in the battery pack can quickly discharge from the exhaust valve, avoiding a large amount of high-temperature and high-pressure gas remaining in the battery pack, and further reducing the risk of battery pack explosion.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent replacement or change made by those skilled in the art according to the technical solution and concept of the present invention should be covered within the protection scope of the present invention.

Claims

1. Explosion-proof mechanism for battery pack of liquid-cooled energy storage cabinet, characterized in that , including: a battery pack, the battery pack including a liquid cooling plate (1) and a housing (2) fixedly mounted on the upper surface of the liquid cooling plate (1) by fasteners; an explosion-proof structure, the explosion-proof structure including a gas discharge structure and a gas delivery structure respectively provided on the surface of the housing (2); a battery limiting structure, the battery limiting structure including a limiting frame (3), a plurality of transverse heat conducting plates (4) and longitudinal heat conducting plates (5) respectively fixedly mounted on the inner wall of the limiting frame (3), and a gas diversion assembly provided on the surface of the battery limiting structure; a gas delivery structure, the gas delivery structure including an air inlet pipe (6) fixedly mounted on the surface of the housing (2), an air inlet hard pipe (7) assembled with the air inlet pipe (6) as a whole through an assembly component, and a fire protection component communicated with the air inlet hard pipe (7); the fire protection component includes an air pump (8), an air tank (9), and an air inlet pipe (10) and an air discharge pipe (11) respectively communicated with the air inlet end and the air discharge end of the air pump (8); a gas discharge structure, the gas discharge structure including an exhaust pipe (12) fixedly mounted on the surface of the housing (2), and an exhaust valve provided on the surface of the exhaust pipe (12), a discharge pipe (13) being provided on the surface of the exhaust valve, and an induction component capable of driving the air pump (8) to work being provided inside the exhaust valve; the exhaust valve includes a valve body (14), and a valve core (15) slidably connected to the inner wall of the valve body (14), and a return spring (16) being fixedly mounted on one side of the valve core (15); the induction component includes a mounting cavity opened on the inner wall of the valve body (14), two fixed contacts (17) fixedly mounted on the inner wall of the mounting cavity, a valve rod (18) slidably mounted on the inner wall of the mounting cavity, and a moving contact (19) fixedly mounted on the left end of the valve rod (18).

2. The explosion-proof mechanism of the battery pack of the liquid-cooled energy storage cabinet according to claim 1, wherein: One end of the air discharge pipe (11) is communicated with one end of the air inlet hard pipe (7), and the end of the air inlet pipe (10) away from the air pump (8) is communicated with the air tank (9).

3. The explosion-proof mechanism of the battery pack of the liquid-cooled energy storage cabinet according to claim 1, characterized in that: The assembly component includes a nut (20) sleeved on the surface of the air inlet hard pipe (7), and a limit ring (25) fixedly mounted on the surface of the air inlet hard pipe (7), and an external thread adapted to the nut (20) being opened on the surface of the air inlet pipe (6).

4. The explosion-proof mechanism of the battery pack of the liquid-cooled energy storage cabinet according to claim 1, wherein: The lower surfaces of the transverse heat conducting plates (4) and the longitudinal heat conducting plates (5) are fixedly connected to the upper surface of the liquid cooling plate (1).

5. The explosion-proof mechanism of the battery pack of the liquid-cooled energy storage cabinet according to claim 1, characterized in that: The gas diversion assembly includes a diversion channel (21) opened on the inner wall of the limiting frame (3), a plurality of exhaust holes (22) opened on the inner wall of the limiting frame (3), diversion holes (23) respectively opened on the surfaces of the transverse heat conducting plates (4) and the longitudinal heat conducting plates (5), and a plug hole (24) opened on the outer surface of the limiting frame (3).

6. The explosion-proof mechanism of the battery pack of the liquid-cooled energy storage cabinet according to claim 5, characterized in that: The exhaust holes (22) and the plug hole (24) are both communicated with the inside of the diversion channel (21), and the plug hole (24) allows the air inlet hard pipe (7) to be inserted.

7. The explosion-proof mechanism of the battery pack of the liquid-cooled energy storage cabinet according to claim 1, wherein: One end of the valve rod (18) is fixedly connected to the left end of the valve core (15), and the return spring (16) is sleeved on the surface of the valve rod (18).

8. The explosion-proof mechanism of the battery pack of the liquid-cooled energy storage cabinet according to claim 1, characterized in that: The fixed contacts (17) are electrically connected to an external control unit, and the external control unit can control the opening and closing of the air pump (8).

Images