Module-free square battery

Abstract

The utility model discloses a module-free square battery, which belongs to the technical field of square batteries, and comprises a box body, a bottom protective plate is arranged below the box body, and a heat insulation material and a square battery are arranged in the box body; the box body is composed of an edge beam, a cross beam and a liquid cooling plate assembly, an opening is formed in one face of the box body, the end of the cross beam is connected with the edge beam, the bottom of the cross beam and the bottom of the edge beam are connected with the liquid cooling plate, exhaust holes are formed in the plate face of the liquid cooling plate, and the edge beam is provided with an exhaust valve; a flow channel is arranged on the plate face of the liquid cooling plate, the liquid cooling plate and the bottom protection plate are fixedly connected in the flow channel, and a smoke exhaust channel is arranged between the liquid cooling plate and the bottom protection plate. According to the utility model, high-temperature flue gas is discharged out of the box body along a specific channel, so that heat influence on other batteries and parts is avoided, heat spreading can be avoided, and the safety of a system is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of square batteries, and particularly relates to a square battery in a module-free form. Background Art

[0002] Lithium-ion batteries have the advantages of light weight, large energy storage, high power, no pollution, long life, small self-discharge coefficient, wide temperature adaptation range, etc., so they are gradually favored by people and have gradually replaced other traditional batteries in the fields of energy storage and power batteries. For square batteries, the integrated solution in the module-free form can improve the space utilization rate inside the box. For square batteries with explosion-proof valves on the cover plate, when thermal runaway occurs, the high-temperature flue gas ejected from the explosion-proof valve impacts the box cover, which is likely to pose a danger to the passenger compartment. At the same time, for the integrated solution in the module-free form, since the batteries are very close to each other, when thermal runaway occurs, the high-temperature flue gas ejected from the explosion-proof valve is very likely to cause thermal shock to adjacent batteries, triggering thermal spread of the surrounding batteries, thus causing thermal runaway of the entire battery pack and resulting in the situation of the battery pack catching fire and exploding. Therefore, it is necessary to design a battery in which the high-temperature flue gas does not impact the passenger compartment and does not cause thermal shock to the surrounding batteries during thermal runaway. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a square battery in a module-free form, which solves the problems in the above background art.

[0004] The purpose of the utility model is realized as follows: A square battery in a module-free form, which includes a box body. A bottom protection plate is arranged below the box body, and heat insulation materials and square batteries are arranged inside the box body; The box body consists of side beams, cross beams and liquid cooling plate assemblies, and an opening is arranged on one side of the box body. The end of the cross beam is connected to the side beam, and the bottoms of the cross beam and the side beam are both connected to the liquid cooling plate. Exhaust holes are arranged on the plate surface of the liquid cooling plate, and an exhaust valve is arranged on the side beam; Flow channels are arranged on the plate surface of the liquid cooling plate, and the liquid cooling plate and the bottom protection plate are fixedly connected inside the flow channels, and a smoke exhaust channel is arranged between the liquid cooling plate and the bottom protection plate.

[0005] Further, mica patches, thermally conductive structural adhesives, structural reinforcement strips, CCS components, fire-resistant insulating tapes and a box cover are arranged inside the box body.

[0006] Further, the first polarity and the second polarity of the square battery are arranged on the same cover plate, the explosion-proof valve is arranged on the housing, and the explosion-proof valve is arranged on the opposite side of the cover plate.

[0007] Further, the bottom protection plate is composed of a mica plate, a heat insulation layer and a bottom support plate in a composite manner.

[0008] Further, the liquid cooling plate and the bottom protection plate are fixedly bonded inside the flow channels.

[0009] Advantages of the present utility model: By providing a liquid cooling plate in cooperation with a composite bottom protection plate to integrate a smoke exhaust channel, it does not occupy the internal space of the system. When thermal runaway occurs, the high-temperature flue gas enters the smoke exhaust channel through the smoke exhaust holes, enters the crossbeam cavity through the crossbeam holes, enters the side beam cavity through the side beam holes, and finally is discharged from the box body through the exhaust valve. The high-temperature flue gas is discharged from the box body along a specific channel, and will not have a thermal impact on other batteries and components, which can avoid the occurrence of thermal spread and ensure the safety of the system. Brief Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the present utility model;

[0011] Figure 2 is a schematic structural diagram of the square battery of the present utility model;

[0012] Figure 3 is a schematic structural diagram of the box body of the present utility model;

[0013] Figure 4 is a schematic structural diagram of the bottom protection plate of the present utility model;

[0014] Figure 5 is a sectional view of the present utility model along the X-axis;

[0015] Figure 6 is of the present utility model Figure 5 enlarged view of A in;

[0016] Figure 7 is a partial sectional view of the box body of the present utility model;

[0017] Figure 8 is of the present utility model Figure 7 enlarged view of B in.

[0018] In the figure: 1 bottom protection plate, 1-1 mica plate, 1-2 heat insulation layer, 1-3 bottom support plate, 2 box body, 2-1 side beam, 2-2 crossbeam, 2-3 liquid cooling plate, 2-4 exhaust hole, 2-5 exhaust valve, 2-6 flow channel, 2-7 smoke exhaust channel, 2-8 crossbeam hole, 2-9 side beam hole, 3 mica patch, 4 thermally conductive structural adhesive, 5 heat insulation material, 6 square battery, 6-1 first polarity, 6-2 second polarity, 6-3 cover plate, 6-4 explosion-proof valve, 6-5 housing, 7 structural reinforcement bar, 8 CCS component, 9 fireproof insulating tape, 10 box cover. Detailed Description of the Preferred Embodiment

[0019] The following further describes the present utility model in detail with reference to the drawings. It should be noted that all the azimuth terms such as up, down, front, back, left, and right that appear in the present utility model are azimuth terms made with Figure 1 as the reference drawing, and all the azimuth terms do not limit the present utility model, but are only for clearer description and explanation of the present utility model. Embodiment

[0020] As Figure 1-8 shown, this embodiment discloses a square battery in a module - free form, which includes a box body 2. A bottom guard plate 1 is arranged below the box body 2, and a heat - insulating material 5 and square batteries 6 are arranged inside the box body 2. The box body 2 is composed of side beams 2 - 1, cross beams 2 - 2 and a liquid - cooling plate 2 - 3. And an opening is arranged on one side of the box body 2. The end of the cross beam 2 - 2 is connected to the side beam 2 - 1. The bottoms of the cross beam 2 - 2 and the side beam 2 - 1 are both connected to the liquid - cooling plate 2 - 3. Exhaust holes 2 - 5 are arranged on the plate surface of the liquid - cooling plate 2 - 3, and an exhaust valve is arranged on the side beam 2 - 1. A flow channel 2 - 6 is arranged on the plate surface of the liquid - cooling plate 2 - 3, and the liquid - cooling plate 2 - 3 and the bottom guard plate 1 are fixedly connected inside the flow channel 2 - 6. A smoke - exhaust channel 2 - 7 is arranged between the liquid - cooling plate 2 - 3 and the bottom guard plate 1. By arranging the liquid - cooling plate 2 - 3 to cooperate with the composite bottom guard plate 1 to integrate the smoke - exhaust channel 2 - 7, it does not occupy the internal space of the system. When thermal runaway occurs, the high - temperature flue gas enters the smoke - exhaust channel 2 - 7 through the smoke - exhaust holes, enters the cavity of the cross beam 2 - 2 through the holes in the cross beam 2 - 2, enters the cavity of the side beam 2 - 1 through the holes in the side beam 2 - 1, and finally is discharged from the box body 2 through the exhaust valve. The high - temperature flue gas is discharged from the box body 2 along a specific channel, and will not have a thermal impact on other batteries and components, and can avoid the occurrence of thermal spread and ensure the safety of the system. Embodiment

[0021] As Figure 1-8 shown, this embodiment discloses a square battery in a module - free form, including a composite bottom guard plate 1, a box body 2, mica patches 3, thermally conductive structural adhesive 4, heat - insulating material 5, square batteries, structural reinforcing strips 7, CCS components 8, fire - resistant insulating tapes 9 and a box cover 10. The first polarity 6 - 1 and the second polarity 6 - 2 of the square battery 6 are on one cover plate 6 - 3, and the explosion - proof valve 6 - 4 is on the housing 6 - 5, and the explosion - proof valve 6 - 4 is arranged on the opposite side of the cover plate 6 - 3. The box body 2 is a box - shaped structure with an opening on one side, and is composed of side beams 2 - 1, cross beams 2 - 2 and a liquid - cooling plate 2 - 3. The end of the cross beam 2 - 2 is connected to the side beam 2 - 1, and the bottoms of the cross beam 2 - 2 and the side beam 2 - 1 are respectively connected to the liquid - cooling plate 2 - 3. The liquid - cooling plate 2 - 3 can be an aluminum extrusion profile structure or a stamping sheet structure. Exhaust holes 2 - 5 are arranged on the liquid - cooling plate 2 - 3, and an exhaust valve is arranged on the side beam 2 - 1.

[0022] For better effect, the composite bottom guard plate 1 is composed of a mica plate 1-1, an insulation layer 1-2 and a bottom support plate 1-3, wherein the mica plate 1-1 is used to protect against the impact of high-temperature flue gas during thermal runaway, the insulation layer 1-2 is used to keep the box 2 warm, and the bottom support plate 1-3 is a high-strength material, which can be a metal plate or a carbon fiber composite plate, and is used to protect the bottom of the battery pack from ball impact. The battery pack is cut perpendicular to the X-axis, and the section A is enlarged. It can be seen that a flow channel 2-6 is provided on the liquid cooling plate 2-3, and the liquid cooling plate 2-3 and the composite bottom guard plate 1 are bonded and fixed together at the flow channel 2-6. A smoke exhaust channel 2-7 is provided between the liquid cooling plate 2-3 and the composite bottom guard plate 1. When the battery is thermally runaway, the high-temperature smoke is ejected from the explosion-proof valve 6-4 and enters the smoke exhaust channel 2-7 through the smoke exhaust hole.

[0023] The side beam 2-1 and the cross beam 2-2 of the box body 2 are partially cut perpendicular to the Z axis, and the local B of the cutting position is enlarged. It can be seen that when the battery has thermal runaway, the high-temperature smoke enters the smoke exhaust channel 2-7 through the smoke exhaust hole, enters the cross beam 2-2 cavity through the cross beam 2-2 hole, enters the side beam 2-1 cavity through the side beam 2-1 hole, and is finally discharged from the box body 2 through the exhaust valve. It can be seen that the process of high-temperature smoke being discharged from the box body 2 has no thermal impact on other batteries and internal components of the box body 2, which can avoid the occurrence of heat spread and ensure the safety of the battery system.

[0024] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A non-module square battery, comprising a box, characterized in that: A bottom guard plate is arranged at the bottom of the box body, and a heat-insulating material and square batteries are arranged inside the box body; the box body is composed of side beams, cross beams and a liquid cooling plate assembly, and an opening is arranged on one side of the box body, the end of the cross beam is connected to the side beam, and the bottom of the cross beam and the side beam are connected to the liquid cooling plate, the plate surface of the liquid cooling plate is provided with exhaust holes, and the side beam is provided with an exhaust valve; the plate surface of the liquid cooling plate is provided with a flow channel, and the liquid cooling plate and the bottom guard plate are fixedly connected inside the flow channel, and a smoke exhaust channel is arranged between the liquid cooling plate and the bottom guard plate.

2. The module-free square battery according to claim 1, characterized in that: The interior of the box is provided with mica patches, heat-conducting structural adhesive, structural reinforcement strips, CCS components, fire-resistant insulation tapes and a box cover.

3. The module-free square battery according to claim 1, characterized in that: The first polarity and the second polarity of the square battery are arranged on the same cover plate, the explosion-proof valve is arranged on the shell, and the explosion-proof valve is arranged on the opposite side of the cover plate.

4. The module-free square battery according to claim 1, characterized in that: The bottom protective plate is composited by a mica plate, a heat insulating layer and a bottom supporting plate.

5. The module-free square battery according to claim 1, characterized in that: The liquid cooling plate and the bottom guard plate are fixed inside the flow channel by bonding.

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