CN216818457U

CN216818457U - Battery cabinet capable of preventing thermal runaway spreading

Info

Publication number: CN216818457U
Application number: CN202220401156.0U
Authority: CN
Inventors: 代德明; 吴细彬
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-06-24
Anticipated expiration: 2032-02-25

Abstract

The utility model discloses a battery cabinet for preventing thermal runaway propagation, which comprises a cabinet, a liquid cooling water inlet main pipe and a liquid cooling water outlet main pipe, wherein the cabinet is sequentially divided into a plurality of storage layers from top to bottom, a high-pressure box is arranged in the lowest storage layer, battery pack assemblies are arranged in the other storage layers, each battery pack assembly comprises an upper battery pack and a lower liquid cooling plate, and the outer wall of each liquid cooling plate is provided with a liquid cooling inlet and a liquid cooling outlet; the liquid cooling water inlet main pipe is connected with a plurality of water inlet branch pipes in parallel, and each water inlet branch pipe is connected with a liquid cooling inlet on the corresponding liquid cooling plate of each layer; a plurality of water outlet branch pipes are connected in parallel on the liquid cooling water outlet main pipe; and each water outlet branch pipe is connected with a liquid cooling outlet on the corresponding liquid cooling plate on each layer. The utility model can improve the performance exertion degree of the battery cell in the normal operation process and improve the consistency level of the battery cell through the temperature field control, thereby being beneficial to improving the cycle life of the battery cell and greatly improving the safety.

Description

Battery cabinet for preventing thermal runaway spreading

Technical Field

The utility model relates to the field of lithium battery energy storage, in particular to a battery cabinet capable of preventing thermal runaway propagation.

Background

Safety is a development bottom line of the energy storage industry, and still has not little challenge in the aspects of energy storage safety, standard specification and the like after the energy storage industry is developed vigorously. The electrochemical energy storage development of China is rapid, the lithium ion battery energy storage with the largest installed scale is in a new stage of large-scale development from the initial stage of commercialization, and the possibility of fire disasters of large-quantity and various lithium ion batteries exists on the power generation side, the power grid side and the user side.

Therefore, in order to avoid damage caused by fire, a thermal runaway source needs to be fundamentally inhibited, so that the energy storage system is strictly required to evaluate the thermal runaway spreading condition of the energy storage system from four levels according to the UL9540A standard, wherein the thermal runaway spreading condition comprises the tests of a battery cell, a module, a cabinet and an installation level. The cell level test mainly shows whether the cell is thermal runaway or not. The module level sees the tendency for thermal runaway to propagate within the module. The rack level sees if thermal runaway is propagating throughout the rack and may propagate to other adjacent racks. And (4) testing at an installation level to see the effectiveness of the fire fighting system.

Pack rank is again arranged to a lot of thermal runaway safeguard measures at present, has ignored the thermal runaway protection of battery cabinet, for duplicate protection, needs a neotype battery cabinet that prevents that thermal runaway from stretching.

Disclosure of Invention

The utility model provides a battery cabinet for preventing thermal runaway spreading, aiming at the defect of thermal runaway protection of the existing energy storage system.

In order to achieve the purpose, the utility model designs a battery cabinet capable of preventing thermal runaway spreading, which comprises a cabinet, a liquid-cooled water inlet main pipe and a liquid-cooled water outlet main pipe, wherein the cabinet is sequentially divided into a plurality of storage layers from top to bottom, a high-pressure box is arranged in the lowest storage layer, battery pack assemblies are arranged in other storage layers, each battery pack assembly comprises an upper battery pack and a lower liquid-cooled plate, and the outer wall of each liquid-cooled plate is provided with a liquid-cooled inlet and a liquid-cooled outlet; the liquid cooling water inlet main pipe is connected with a plurality of water inlet branch pipes in parallel, and each water inlet branch pipe is connected with a liquid cooling inlet on the liquid cooling plate corresponding to each layer; the liquid cooling water outlet main pipe is connected with a plurality of water outlet branch pipes in parallel; and each water outlet branch pipe is connected with a liquid cooling outlet on the corresponding liquid cooling plate of each layer.

Further, the top of the cabinet is provided with a top plate, the two sides of the cabinet are provided with side plates, and a pressure-resistant and corrosion-resistant spraying layer is sprayed on the inner walls of the side plates.

Still further, the liquid cooling water inlet main pipe is in the shape of an inverted L, the water inlet end of the liquid cooling water inlet main pipe is higher than all liquid cooling inlets, the liquid cooling water outlet main pipe is in the shape of an L, and the water outlet end of the liquid cooling water outlet main pipe is lower than all liquid cooling outlets.

Still further, the rack includes four perpendicular roof beams and multiunit beam assembly, and every group beam assembly includes the crossbeam that two symmetries set up, and the crossbeam both ends are fixed on the perpendicular roof beam that corresponds, and multiunit beam assembly falls into the rack from top to bottom and puts the layer, and the interval is provided with a plurality of interior welts between the beam assembly on every layer of putting the layer.

Furthermore, inner baffles are symmetrically arranged on two sides of the liquid cooling plate; the battery pack is characterized in that a fixing strip is arranged on the bottom edge of the battery pack in the circumferential direction, and a plurality of fixing holes are formed in the fixing strip at intervals.

And furthermore, fire-proof layers are sprayed on the outer surfaces of the cabinet, the top plate, the inner partition plate and the side plates.

The utility model has the beneficial effects that:

1. according to the utility model, through temperature field control, the performance exertion degree of the battery cell in the normal operation process can be improved, and the consistency level of the battery cell can be improved, so that the cycle life of the battery cell is favorably prolonged, and the safety is greatly improved;

2. according to the utility model, through the integrated design of the liquid cooling system of the battery pack and the fireproof layer of the battery cabinet, namely, each battery system in a cluster is connected in series, the liquid cooling systems are connected in parallel, the battery pack integrating the liquid cooling systems is fixed with the battery cabinet, a lining plate coated with the fireproof layer (having the fireproof and heat insulation functions) is arranged between the material layers, and the whole parts of the battery cabinet are sprayed with fireproof layer powder;

3. the utility model has good barrier effect on the thermal runaway spread of the battery and is beneficial to the consistency maintenance of the battery core.

Drawings

FIG. 1 is a schematic structural diagram of a battery cabinet for preventing thermal runaway propagation;

FIG. 2 is a disassembled view of a battery cabinet for preventing thermal runaway propagation;

FIG. 3 is a detail view of a liquid cooled connection of a battery pack assembly;

in the figure, a cabinet 1, a vertical beam 1.1, a beam 1.2, an inner lining plate 1.3, a liquid cooling water inlet main pipe 2, a liquid cooling water outlet main pipe 3, a high pressure tank 4, a battery pack 5, a fixing strip 5.1, a fixing hole 5.2, a liquid cooling plate 6, a liquid cooling inlet 6.1, a liquid cooling outlet 6.2, an inner partition plate 6.3, a water inlet branch pipe 7, a water outlet branch pipe 8, a top plate 9, a side plate 10 and a spraying layer 11.

Detailed Description

The utility model is described in further detail below with reference to the drawings and specific embodiments so as to be understood by those skilled in the art.

The battery cabinet for preventing thermal runaway spreading as shown in fig. 1-3 comprises a cabinet 1, a liquid cooling water inlet main pipe 2 and a liquid cooling water outlet main pipe 3, wherein the cabinet 1 comprises four vertical beams 1.1 and 9 groups of beam assemblies, each group of beam assembly comprises two symmetrically arranged beams 1.2, two ends of each beam 1.2 are fixed on the corresponding vertical beam 1.1, the cabinet 1 is divided into 9 layers by a plurality of groups of beam assemblies from top to bottom, and a plurality of lining plates 1.3 are arranged between the beam assemblies of each layer at intervals; a top plate 9 is arranged at the top of the cabinet 1, side plates 10 are arranged on two sides of the cabinet 1, and a pressure-resistant and corrosion-resistant spraying layer 11 is sprayed on the inner walls of the side plates 10;

a high-pressure box 4 is arranged in the lowest layer of the cabinet 1, battery pack assemblies are arranged in other layers of the cabinet, each battery pack assembly comprises an upper battery pack 5 and a lower liquid cooling plate 6, and the outer wall of each liquid cooling plate 6 is provided with a liquid cooling inlet 6.1 and a liquid cooling outlet 6.2; the liquid cooling water inlet main pipe 2 is connected with a plurality of water inlet branch pipes 7 in parallel, each water inlet branch pipe 7 is connected with a liquid cooling inlet 6.1 on the corresponding liquid cooling plate 6 of each layer, the liquid cooling water inlet main pipe 2 is in an inverted L shape, and the water inlet end of the liquid cooling water inlet main pipe is higher than all the liquid cooling inlets 6.1;

a plurality of water outlet branch pipes 8 are connected in parallel on the liquid cooling water outlet main pipe 3; each water outlet branch pipe 8 is connected with the liquid cooling outlet 6.2 on the corresponding liquid cooling plate 6 of each layer, the liquid cooling water outlet main pipe 3 is L-shaped, and the water outlet end of the liquid cooling main pipe is lower than all the liquid cooling outlets 6.2; inner baffles 6.3 are symmetrically arranged at two sides of the liquid cooling plate 6; the liquid cooling plate 6 is fixed on a beam 1.2 of the cabinet 1 through inner partition plates 6.3 at two sides; the battery pack 5 bottom edge circumference is provided with fixed strip 5.1, and the interval is provided with a plurality of fixed orificess 5.2 on the fixed strip 5.1.

The outer surfaces of the cabinet 1, the top plate 9, the inner partition plate 6.3 and the side plate 10 are sprayed with fireproof layers.

The spray powder properties of the above-mentioned spray coating 11 are required as follows:

the material is burned for three minutes by using open fire at 1100 ℃, the outer layer does not catch fire and the hardness reaches 2H, the inner layer does not catch fire, and the temperature is lower than 280 ℃;

secondly, the voltage resistance, the insulation and the corrosion resistance are good;

and thirdly, the coating can be sprayed and soaked, is suitable for various thicknesses, and has good corner coating performance.

In the above-mentioned battery cabinet use that prevents thermal runaway and stretch, when certain electric core takes place thermal runaway, the liquid cooling system reacts rapidly, utilizes the cooling of biggest refrigerating power to thermal runaway electric core and adjacent electric core, and the flame retardant coating of cooperation battery cabinet, and experiment shows that this kind of mode has very big effect to restraining electric core thermal creep, can draw down the maximum temperature value of adjacent electric core rapidly, makes it not arrive thermal runaway critical temperature value.

Other parts not described in detail are prior art. Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.

Claims

1. The utility model provides a battery cabinet that thermal runaway of prevention spreads which characterized in that: the solar water-cooling solar water heater comprises a cabinet (1), a liquid-cooling water inlet main pipe (2) and a liquid-cooling water outlet main pipe (3), wherein the cabinet (1) is sequentially divided into a plurality of storage layers from top to bottom, a high-pressure box (4) is placed in the lowest storage layer, battery pack assemblies are arranged in other storage layers, each battery pack assembly comprises an upper battery pack (5) and a lower liquid-cooling plate (6), and the outer wall of each liquid-cooling plate (6) is provided with a liquid-cooling inlet (6.1) and a liquid-cooling outlet (6.2); a plurality of water inlet branch pipes (7) are connected in parallel on the liquid cooling water inlet main pipe (2), and each water inlet branch pipe (7) is connected with a liquid cooling inlet (6.1) on the corresponding liquid cooling plate (6) on each layer; a plurality of water outlet branch pipes (8) are connected in parallel on the liquid cooling water outlet main pipe (3); each water outlet branch pipe (8) is connected with a liquid cooling outlet (6.2) on the corresponding liquid cooling plate (6) of each layer.

2. The battery cabinet for preventing the propagation of thermal runaway according to claim 1, characterized in that: the top of the cabinet (1) is provided with a top plate (9), two sides of the cabinet (1) are provided with side plates (10), and a pressure-resistant and corrosion-resistant spraying layer (11) is sprayed on the inner wall of each side plate (10).

3. The battery cabinet for preventing the propagation of thermal runaway according to claim 1, characterized in that: the liquid cooling is intake and is responsible for (2) and be the type of falling L, and its end of intaking is higher than all liquid cooling import (6.1), liquid cooling is gone out water and is responsible for (3) and be the type of L, and its water outlet end is less than all liquid cooling exports (6.2).

4. The battery cabinet for preventing the propagation of thermal runaway according to claim 1, characterized in that: the cabinet (1) comprises four vertical beams (1.1) and a plurality of groups of beam assemblies, each group of beam assemblies comprises two symmetrically arranged beams (1.2), two ends of each beam (1.2) are fixed on the corresponding vertical beams (1.1), the plurality of groups of beam assemblies divide the cabinet (1) into a plurality of layers of material placement layers from top to bottom, and a plurality of lining plates (1.3) are arranged between the beam assemblies of each layer of material placement layer at intervals.

5. The battery cabinet for preventing the propagation of thermal runaway according to claim 1, characterized in that: inner baffles (6.3) are symmetrically arranged at two sides of the liquid cooling plate (6); the battery pack is characterized in that a fixing strip (5.1) is arranged on the bottom edge of the battery pack (5) in the circumferential direction, and a plurality of fixing holes (5.2) are formed in the fixing strip (5.1) at intervals.

6. The battery cabinet for preventing the propagation of thermal runaway according to claim 1, characterized in that: and fire-proof layers are sprayed on the outer surfaces of the cabinet (1), the top plate (9), the inner partition plate (6.3) and the side plate (10).