Gas-liquid separation device and battery pack

Abstract

The invention provides a gas-liquid separation device and a battery pack, the gas-liquid separation device comprises at least one heat exchange condensation mechanism used for condensing a gas-liquid mixture, the heat exchange condensation mechanism comprises a heat exchange shell, and the heat exchange shell is provided with a condensation flow channel and a refrigerant flow channel; the condensation flow channel is provided with a fluid inlet and a fluid outlet, the fluid inlet is used for communicating with an anti-explosion valve outlet of the battery cell and is hermetically connected with the outer wall of the battery cell, and the fluid outlet is used for discharging gas; the refrigerant flow channel is provided with a refrigerant inlet allowing a refrigerant to flow in and a refrigerant outlet allowing the refrigerant to flow out. In the heat exchange shell, a gas-liquid mixture in the condensation flow channel exchanges heat with a refrigerant in the refrigerant flow channel; the gas-liquid mixture is cooled through the refrigerant, so that part of gaseous electrolyte in the gas-liquid mixture is condensed into liquid electrolyte, gas-liquid separation can be realized, and the gas-liquid mixture discharged from the fluid outlet is reduced; therefore, the amount of smoke formed by mixing exhausted gas and liquid is reduced, the problem that a large amount of smoke is exhausted after thermal runaway of the battery cell can be solved, and potential safety hazards are reduced.

Description

Technical Field

[0001] This application relates to the field of lithium battery technology, specifically to a gas-liquid separation device, and also to a battery pack. Background Technology

[0002] Currently, lithium-ion power batteries are the most commonly used batteries in new energy vehicles; lithium batteries are often installed in the form of blade battery packs. Blade battery packs design individual cells as thin, long blades and encapsulate them directly, thus accommodating more cells within a limited space and effectively improving the overall energy density of the battery. Each cell is equipped with an explosion-proof valve. In the event of thermal runaway, the explosion-proof valve opens, allowing high-temperature gases inside the cell to escape and release internal pressure.

[0003] To optimize the fast charging and discharging performance of the battery cells, it is inevitable to inject a larger amount of electrolyte inside the lithium battery cells to meet the rapid ionization of lithium ions during charging and discharging. However, after thermal runaway of the cells in the blade battery pack, some of the liquid electrolyte is vaporized at high temperature, forming a high-speed gas flow. This high-speed gas flow carries a large amount of liquid electrolyte, gaseous electrolyte, and a mixture of chemical reactions out of the pack. The gas-liquid mixture undergoes complex reactions, forming a large amount of smoke, causing a significant safety hazard due to the large amount of smoke emitted after thermal runaway of the cells. Summary of the Invention

[0004] The purpose of this application is to provide a gas-liquid separation device and a battery pack to solve the problem of excessive smoke emission after thermal runaway of the battery cell and reduce safety hazards.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A gas-liquid separation device includes at least one heat exchange condensation mechanism for condensing a gas-liquid mixture. The heat exchange condensation mechanism includes a heat exchange shell, which is provided with a condensation channel and a refrigerant channel. The condensation channel has a fluid inlet and a fluid outlet. The fluid inlet is used to communicate with the outlet of an explosion-proof valve of a battery cell and is sealed to the outer wall of the battery cell. The fluid outlet is used to discharge gas. The refrigerant channel has a refrigerant inlet for refrigerant to flow in and a refrigerant outlet for refrigerant to flow out.

[0007] Optionally, in the above-mentioned gas-liquid separation device, the heat exchange shell includes:

[0008] A heat exchange shell, on which an external refrigerant flow channel is provided;

[0009] A heat exchange baffle is disposed in the heat exchange shell, the heat exchange baffle divides the condensation channel into a first condensation channel and a second condensation channel, and a central refrigerant channel is provided on the heat exchange baffle;

[0010] The refrigerant flow channel includes the external refrigerant flow channel and the central refrigerant flow channel.

[0011] Optionally, in the above-mentioned gas-liquid separation device, the heat exchange shell includes a first side plate and a second side plate for sealing connection with the surface of the battery cell where the explosion-proof valve is located, and the external refrigerant flow channel includes a first external refrigerant flow channel opened on the first side plate and a second external refrigerant flow channel opened on the second side plate.

[0012] Optionally, in the above-mentioned gas-liquid separation device, the heat exchange baffle has a clearance gap between the flow-facing surface of the heat exchange baffle and the fluid inlet, and the flow-facing surface is a gradually expanding guide surface along the flow direction of the fluid inlet.

[0013] The heat exchange baffle divides the fluid outlet into a first fluid outlet and a second fluid outlet. The first condensation channel is connected between the fluid inlet and the first fluid outlet, and the second condensation channel is connected between the fluid inlet and the second fluid outlet.

[0014] Optionally, in the above-mentioned gas-liquid separation device, the external refrigerant flow channel has an external refrigerant inlet and an external refrigerant outlet; the central refrigerant flow channel has a central refrigerant inlet and a central refrigerant outlet;

[0015] The heat exchange and condensation mechanism also includes a refrigerant flow equalization plate, which is provided with a refrigerant inlet channel and a refrigerant outlet channel. The refrigerant inlet channel has a total refrigerant inlet, an external branch outlet, and a middle branch outlet. The refrigerant outlet channel has a total refrigerant outlet, an external branch return outlet, and a middle branch return outlet.

[0016] The external branch outlet is connected to the external refrigerant inlet, and the external branch return port is connected to the external refrigerant outlet; the middle branch outlet is connected to the middle refrigerant inlet, and the middle branch return port is connected to the middle refrigerant outlet.

[0017] Optionally, in the above-mentioned gas-liquid separation device, there are multiple heat exchange and condensation mechanisms, which are used to connect one-to-one with the surfaces of multiple battery cells equipped with explosion-proof valves.

[0018] Each heat exchange and condensation mechanism has an input plate and an output plate connected to both sides of the refrigerant flow equalization plate. The input plate is provided with an input channel for inputting refrigerant into the main refrigerant inlet, and the input channel is connected to the main refrigerant inlet. The output plate is provided with an output channel for outputting refrigerant from the main refrigerant outlet, and the output channel is connected to the main refrigerant outlet.

[0019] All of the refrigerant flow equalization plates are assembled into a flow equalization plate assembly through the input plate and the output plate, and the input plate and the output plate located between two adjacent refrigerant flow equalization plates are integrated into a connecting plate module.

[0020] Optionally, the above-mentioned gas-liquid separation device further includes a gas-liquid separation mechanism, which includes:

[0021] A gas-liquid separation shell having a gas-liquid separation chamber, the gas-liquid separation chamber having an air inlet and an air outlet, the air inlet being connected to the fluid outlet, and the air outlet being connected to the outside;

[0022] At least one gas-liquid separation component is provided for gas-liquid separation of a gas-liquid mixture, the gas-liquid separation component being disposed in the gas-liquid separation chamber;

[0023] The gas-liquid separation component includes:

[0024] Liquid-absorbing structure, used to adsorb liquid;

[0025] A filter plate is used to separate gas-liquid mixtures by deflection. The filter plate is disposed on at least one side of the liquid absorption structure and has multiple through holes for fluid to pass through.

[0026] Optionally, in the above-mentioned gas-liquid separation device, the gas-liquid separation shell includes a top plate, a bottom plate, a first vertical plate, and a second vertical plate, which cooperate to form a central cavity; a first support plate is provided in the central cavity, and the first support plate, the top plate, the first vertical plate, and the second vertical plate cooperate to form the gas-liquid separation chamber, the air inlet is provided on the first vertical plate, and the gas-liquid separation component is provided on the first support plate.

[0027] Optionally, in the above-mentioned gas-liquid separation device, the gas-liquid separation mechanism further includes:

[0028] A second support plate is disposed within the central cavity, and the second support plate is located between the first support plate and the bottom plate;

[0029] A baffle plate is disposed between the first support plate and the second support plate. The baffle plate divides the cavity between the first support plate and the second support plate into an upper refrigerant channel and a lower refrigerant channel. The upper refrigerant channel has an inlet for connecting to a refrigerant supply pipe, and the lower refrigerant channel has an outlet for connecting to a refrigerant return pipe.

[0030] The first upright plate is provided with a refrigerant outlet interface and a refrigerant return interface. The refrigerant outlet interface connects the upper refrigerant channel with the refrigerant inlet of the refrigerant channel, and the refrigerant return interface connects the refrigerant outlet of the refrigerant channel with the lower refrigerant channel.

[0031] Optionally, in the above-mentioned gas-liquid separation device, a liquid storage tank is provided at the bottom of the gas-liquid separation shell;

[0032] The gas-liquid separation chamber has a drain port, which is located on the lower side of the liquid absorption structure and is connected to the liquid storage tank through a drain conduit.

[0033] The gas-liquid separation device provided in this application includes at least one heat exchange condensation mechanism for condensing a gas-liquid mixture; the heat exchange condensation mechanism includes a heat exchange shell, the heat exchange shell is provided with a condensation flow channel and a refrigerant flow channel; wherein, the condensation flow channel has a fluid inlet and a fluid outlet, the fluid inlet is used to communicate with the explosion-proof valve outlet of the battery cell and is sealed to the outer wall of the battery cell, and the fluid outlet is used to discharge gas; the refrigerant flow channel has a refrigerant inlet for refrigerant to flow in and a refrigerant outlet for refrigerant to flow out.

[0034] In application, the fluid inlet of the condenser channel of the heat exchanger and condenser mechanism is connected to the outlet of the explosion-proof valve of the battery cell and sealed to the outer wall of the battery cell. This allows it to receive the gas-liquid mixture discharged from the outlet of the explosion-proof valve of the battery cell. When the battery cell experiences thermal runaway, the explosion-proof valve opens, and the high-temperature gas inside the battery cell, carrying the gas-liquid mixture formed by the liquid electrolyte, is discharged from the outlet of the explosion-proof valve and enters the fluid inlet of the heat exchanger and condenser mechanism. After flowing through the condenser channel, it is discharged from the fluid outlet. Simultaneously, the refrigerant enters from the refrigerant inlet of the heat exchanger and condenser mechanism, flows through the refrigerant channel, and is discharged from the refrigerant outlet.

[0035] In the heat exchange shell, the gas-liquid mixture in the condensation channel exchanges heat with the refrigerant in the refrigerant channel. By cooling the gas-liquid mixture with the refrigerant, some of the gaseous electrolyte in the gas-liquid mixture condenses into liquid electrolyte, which can achieve gas-liquid separation and reduce the amount of gas-liquid mixture discharged from the fluid outlet. This reduces the amount of flue gas formed by the discharged gas-liquid mixture, which can solve the problem of large amounts of smoke after thermal runaway of the battery cell and reduce safety hazards.

[0036] This application also provides a battery pack, including a plurality of battery cells and a gas-liquid separation device connected to the outlet of the explosion-proof valve of the battery cells, wherein the gas-liquid separation device is any of the gas-liquid separation devices described above; since the gas-liquid separation devices have the above-mentioned effects, the battery pack having the above-mentioned gas-liquid separation devices has the same effects, so it will not be described in detail here. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be introduced below. The accompanying drawings described below are merely embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0038] Figure 1 A schematic diagram of an exemplary gas-liquid separation device consistent with some embodiments of this application is shown;

[0039] Figure 2 A schematic diagram of an exemplary battery cell, consistent with some embodiments of this application, is shown.

[0040] Figure 3 A three-dimensional structural diagram of an exemplary gas-liquid separation device connected to a battery cell, consistent with some embodiments of this application, is shown.

[0041] Figure 4 A front view of an exemplary gas-liquid separation device connected to a battery cell, consistent with some embodiments of this application, is shown.

[0042] Figure 5 A top view of an exemplary gas-liquid separation device connected to a battery cell, consistent with some embodiments of this application, is shown.

[0043] Figure 6 It shows along Figure 5 Schematic diagram of the cross-sectional structure of line AA in the middle;

[0044] Figure 7 It shows along Figure 5 Schematic diagram of the cross-sectional structure of the middle BB line;

[0045] Figure 8 It shows Figure 7 A magnified schematic diagram of the local structure of D;

[0046] Figure 9 It shows along Figure 5 Schematic diagram of the cross-sectional structure of the CC line;

[0047] Figure 10 A three-dimensional structural schematic diagram of an exemplary heat exchange shell in one direction, consistent with some embodiments of this application, is shown.

[0048] Figure 11 A three-dimensional structural schematic diagram of an exemplary heat exchange shell, consistent with some embodiments of this application, is shown in another direction.

[0049] Figure 12 A perspective structural schematic diagram of an exemplary heat exchange shell consistent with some embodiments of this application is shown;

[0050] Figure 13 A schematic diagram of an exemplary gas-liquid separation device after the heat exchange shell has been removed, consistent with some embodiments of this application, is shown.

[0051] Figure 14A schematic diagram of an exemplary flow equalizer assembly consistent with some embodiments of this application is shown;

[0052] Figure 15 A schematic diagram of an exemplary gas-liquid separation mechanism consistent with some embodiments of this application is shown;

[0053] Figure 16 A partial structural schematic diagram of an exemplary gas-liquid separation mechanism consistent with some embodiments of this application is shown;

[0054] Figure 17 It shows Figure 16 The main view;

[0055] Figure 18 It shows along Figure 17 Schematic diagram of the cross-sectional structure of the EE line.

[0056] in, Figures 1-18 middle:

[0057] 1-Heat exchange baffle; 11-Central refrigerant flow channel; 11a-Central refrigerant inlet; 11b-Central refrigerant outlet; 12-Guide surface;

[0058] 2-Heat exchange shell; 21-First side plate; 211-First external refrigerant flow channel; 22-Second side plate; 221-Second external refrigerant flow channel; 2a-External refrigerant inlet; 2b-External refrigerant outlet; 2c-First condensation flow channel; 2d-Second condensation flow channel;

[0059] 3-Gas-liquid separator shell; 31-Air inlet; 32-Refrigerant outlet interface; 33-Refrigerant return port interface; 3a-Top plate; 3b-Bottom plate; 3c-First vertical plate; 3d-Second vertical plate;

[0060] 4-Flow equalization plate assembly; 41-Input plate; 411-Input channel; 42-Refrigerant flow equalization plate; 421-External branch outlet; 422-Middle branch outlet; 423-External branch return port; 424-Middle branch return port; 43-Output plate; 431-Output channel; 44-Connecting plate module;

[0061] 5-First support plate; 6-Baffle plate; 7-Second support plate; 8-Third support plate; 9-Filter plate; 10-Drainage conduit; 13-Liquid absorption structure;

[0062] S1 - Upper refrigerant flow channel; S2 - Lower refrigerant flow channel; 100 - Battery cell; 100a - Explosion-proof valve. Detailed Implementation

[0063] The embodiments of this application will be described below. It should be noted that, in order to provide a concise description of these embodiments, this specification cannot provide a detailed description of all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, changes may occur from one embodiment to another to achieve specific objectives. Furthermore, it is also understood that, although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content of this application, some design, manufacturing, or production modifications based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient content of this application.

[0064] like Figures 1-9 As shown, the gas-liquid separation device provided in this application includes at least one heat exchange condensation mechanism for condensing a gas-liquid mixture; the heat exchange condensation mechanism includes a heat exchange shell, which is provided with a condensation channel and a refrigerant channel; wherein, the condensation channel has a fluid inlet and a fluid outlet, the fluid inlet is used to communicate with the outlet of the explosion-proof valve 100a of the battery cell 100 and is sealed to the outer wall of the battery cell 100, and the fluid outlet is used to discharge gas; the refrigerant channel has a refrigerant inlet for refrigerant to flow in and a refrigerant outlet for refrigerant to flow out.

[0065] In application, the fluid inlet of the condenser channel of the heat exchange condensing mechanism is connected to the outlet of the explosion-proof valve 100a of the battery cell 100 and sealed to the outer wall of the battery cell 100. This allows it to receive the gas-liquid mixture discharged from the outlet of the explosion-proof valve 100a by the battery cell 100. When the battery cell 100 experiences thermal runaway, the explosion-proof valve 100a opens, and the gas-liquid mixture formed by the high-temperature gas inside the battery cell 100 carrying the liquid electrolyte is discharged from the outlet of the explosion-proof valve 100a and enters the fluid inlet of the heat exchange condensing mechanism. After flowing through the condenser channel, it is discharged from the fluid outlet. Simultaneously, the refrigerant enters from the refrigerant inlet of the heat exchange condensing mechanism, flows through the refrigerant channel, and is discharged from the refrigerant outlet.

[0066] In the heat exchange shell, the gas-liquid mixture in the condensation channel exchanges heat with the refrigerant in the refrigerant channel; by cooling the gas-liquid mixture with the refrigerant, some of the gaseous electrolyte in the gas-liquid mixture condenses into liquid electrolyte, which can achieve gas-liquid separation and reduce the amount of gas-liquid mixture discharged from the fluid outlet; thereby reducing the amount of flue gas formed by the discharged gas-liquid mixture, which can solve the problem of large amount of smoke emission after thermal runaway of the battery cell 100 and reduce safety hazards.

[0067] It should be noted that the fluid inlet size of the heat exchange housing is determined based on the outlet size of the explosion-proof valve 100a of the battery cell 100, to meet the battery pack design of battery cells 100 of different specifications connected in series and parallel. The fluid inlet size can be larger than the size of the explosion-proof valve 100a of the battery cell 100. After the fluid inlet of the heat exchange housing is sealed to the outer wall of the battery cell 100, the circumferential sidewall of the fluid inlet wraps around the outer ring of the explosion-proof valve 100a to ensure that in the event of thermal runaway of the battery cell 100, all the gas-liquid mixture ejected from the explosion-proof valve 100a of the battery cell 100 enters the fluid inlet.

[0068] Optionally, the BMS (Battery Management System) determines whether cell 100 is thermally runaway based on the voltage and temperature changes of each cell 100. When cell 100 thermally runs away, the BMS controls the refrigerant to enter from the refrigerant inlet of the heat exchange and condensation mechanism, flow through the refrigerant channel, and then exit from the refrigerant outlet.

[0069] In some embodiments, the heat exchange housing includes a heat exchange outer shell 2, on which an external refrigerant flow channel is formed; a heat exchange baffle 1 is disposed in the heat exchange outer shell 2, which divides the condensation flow channel into a first condensation flow channel 2c and a second condensation flow channel 2d, and a central refrigerant flow channel 11 is formed on the heat exchange baffle 1; wherein the refrigerant flow channel includes an external refrigerant flow channel and a central refrigerant flow channel 11, such as Figures 10-12 As shown.

[0070] With this configuration, the gas-liquid mixture discharged from the explosion-proof valve 100a of the battery cell 100 enters the fluid inlet of the heat exchange condensation mechanism, flows through the first condensation channel 2c and the second condensation channel 2d respectively, and is then discharged from the fluid outlet. Simultaneously, refrigerant is introduced into the external refrigerant channel on the heat exchange shell 2 and the central refrigerant channel 11 on the heat exchange partition 1. Through the refrigerant both outside and inside the heat exchange shell, the gas-liquid mixture in the first condensation channel 2c and the second condensation channel 2d is simultaneously cooled, increasing the heat exchange area, enhancing condensation intensity, improving gas-liquid separation, and causing more gaseous electrolyte in the gas-liquid mixture to condense into liquid electrolyte, further reducing the emitted gas-liquid mixture and better addressing the smoke emission phenomenon after battery pack thermal runaway.

[0071] It is understood that this application may also omit the heat exchange baffle 1 and use only the external refrigerant flow channel on the heat exchange shell 2 to cool down the gas-liquid mixture in the condensation flow channel, so that the vaporized electrolyte is liquefied back into liquid electrolyte, reducing the electrolyte flowing out of the package.

[0072] In some embodiments, the heat exchange housing 2 includes a first side plate 21 and a second side plate 22 for sealing connection with the surface of the cell 100 where the explosion-proof valve 100a is located, and the external refrigerant flow channel includes a first external refrigerant flow channel 211 opened on the first side plate 21 and a second external refrigerant flow channel 221 opened on the second side plate 22.

[0073] By simultaneously introducing refrigerant into the first external refrigerant channel 211 on the first side plate 21 and the second external refrigerant channel 221 on the second side plate 22, the heat exchange shell can cool the gas-liquid mixture in the condensation channel from both sides, ensuring the heat exchange area and thus ensuring the gas-liquid separation effect.

[0074] Preferably, the first side plate 21 and the second side plate 22 are both arranged vertically and perpendicularly on the surface of the cell 100 where the explosion-proof valve 100a is located; in this way, the first side plate 21 and the second side plate 22 are arranged on the long side of the cover plate of the cell 100, which allows for a larger arrangement space and ensures the heat exchange area.

[0075] Furthermore, the heat exchange baffle 1 is located between the first side plate 21 and the second side plate 22 and is arranged parallel to the first side plate 21. The heat exchange baffle 1 can also be arranged perpendicular to the first side plate 21, dividing the condensation channel into two condensation channels arranged vertically.

[0076] like Figures 10-11 As shown, the first side plate 21, the second side plate 22, and the heat exchange baffle 1 form three parallel plates, and each of the three plates is provided with a refrigerant channel to form a three-layer cooling plate. By simultaneously introducing refrigerant into the first external refrigerant channel 211 on the first side plate 21, the second external refrigerant channel 221 on the second side plate 22, and the central refrigerant channel 11 on the heat exchange baffle 1, the gas-liquid mixture in the condensation channel is cooled on three sides, ensuring the heat exchange area and thus ensuring the gas-liquid separation effect. In addition, the first condensation channel 2c and the second condensation channel 2d formed by the three plates are directly opposite the outlet of the explosion-proof valve 100a, which facilitates the entry of the gas-liquid mixture discharged from the explosion-proof valve 100a, reduces gas resistance, and ensures the gas-liquid separation effect. Moreover, the structure is relatively simple, convenient for processing and assembly, and also convenient for sealing connection with the outer wall of the battery cell 100. Optionally, external refrigerant channels can also be provided on the top and bottom side plates of the heat exchange shell 2.

[0077] In some embodiments, the heat exchange baffle 1 has a clearance gap between the flow-facing surface near the fluid inlet and the fluid inlet, and the flow-facing surface is a gradually expanding guide surface 12 along the flow direction of the fluid inlet; wherein, the heat exchange baffle 1 divides the fluid outlet into a first fluid outlet and a second fluid outlet, the first condensation channel 2c is connected between the fluid inlet and the first fluid outlet, and the second condensation channel 2d is connected between the fluid inlet and the second fluid outlet.

[0078] like Figure 7 and Figure 10 As shown, the clearance between the heat exchange baffle 1 and the fluid inlet, and the gradually expanding guide surface 12 of the heat exchange baffle 1, can prevent resistance to the inflow and diversion of the gas-liquid mixture, facilitating the gas-liquid mixture to enter the first condensing channel 2c and the second condensing channel 2d respectively, further ensuring the gas-liquid separation effect and reducing the proportion of electrolyte flowing out of the casing. In this way, the high-temperature gas-liquid mixture ejected from the explosion-proof valve 100a of the battery cell 100 enters through the fluid inlet, flows through the guide surface 12 of the heat exchange baffle 1 into the first condensing channel 2c and the second condensing channel 2d respectively, and exchanges heat with the three-layer cooling plates to separate the condensed liquid, before being discharged through the first fluid outlet and the second fluid outlet respectively. Optionally, the width of the outer wall of the heat exchange shell near the fluid inlet is smaller than the width at other locations; specifically, the width of the outer wall of the heat exchange shell near the fluid inlet is smaller than the width of the battery cell 100, facilitating assembly and saving space; the width of the outer wall of the heat exchange shell away from the fluid inlet is equal to the width of the battery cell 100, resulting in better dimensional consistency and easier processing.

[0079] In some embodiments, both the external refrigerant flow channel and the central refrigerant flow channel 11 are serpentine flow channels. For example... Figure 7 and Figure 12 As shown, the serpentine flow channel includes multiple straight flow channels connected end-to-end by bends, extending the refrigerant flow path and thus increasing the heat exchange area and time between the refrigerant and the gas-liquid mixture in the condenser channel. This optimizes gas-liquid separation and further reduces the amount of gas-liquid mixture discharged from the fluid outlet, better addressing the problem of excessive smoke emission after thermal runaway of the battery cell 100. The external and central refrigerant flow channels 11 can also be spiral, U-shaped, or multiple linear flow channels, etc.

[0080] In some embodiments, the external refrigerant channel has an external refrigerant inlet 2a and an external refrigerant outlet 2b; the central refrigerant channel 11 has a central refrigerant inlet 11a and a central refrigerant outlet 11b. For example... Figure 11 and Figure 12 As shown, in the three-layer cooling plate, the first external refrigerant channel 211 on the first side plate 21 and the second external refrigerant channel 221 on the second side plate 22 are both provided with external refrigerant inlets 2a and external refrigerant outlets 2b. The middle refrigerant channel 11 on the heat exchange baffle 1 is provided with a middle refrigerant inlet 11a and a middle refrigerant outlet 11b. This arrangement, by simultaneously introducing refrigerant into both the external refrigerant inlet 2a and the middle refrigerant inlet 11a, achieves a parallel connection between the external refrigerant channel and the middle refrigerant channel 11, which can improve heat exchange efficiency and thus enhance the gas-liquid separation effect caused by condensation. Optionally, the external refrigerant channel and the middle refrigerant channel 11 can be connected in series, sharing a single refrigerant inlet and a single refrigerant outlet.

[0081] In some embodiments, the heat exchange condensation mechanism further includes a refrigerant flow equalization plate 42, which is provided with a refrigerant inlet channel and a refrigerant outlet channel. The refrigerant inlet channel has a total refrigerant inlet, an external branch outlet 421, and a central branch outlet 422. The refrigerant outlet channel has a total refrigerant outlet, an external branch return port 423, and a central branch return port 424. The external branch outlet 421 is connected to the external refrigerant inlet 2a, and the external branch return port 423 is connected to the external refrigerant outlet 2b. The central branch outlet 422 is connected to the central refrigerant inlet 11a, and the central branch return port 424 is connected to the central refrigerant outlet 11b. Figures 13-14 As shown, refrigerant is simultaneously introduced into the external refrigerant inlet 2a and the central refrigerant inlet 11a through the refrigerant flow equalization plate 42, which can uniformly flow the refrigerant and improve the heat exchange uniformity. Moreover, the structure is simple and easy to assemble. When cell 100 experiences thermal runaway, refrigerant enters the main refrigerant inlet, flows through the refrigerant inlet channel, and exits from the external branch outlet 421 and the central branch outlet 422. It then flows from the external branch outlet 421 into the external refrigerant inlet 2a, through the external refrigerant channel, and out through the external refrigerant outlet 2b to the external branch return port 423. From the central branch outlet 422, it flows into the central refrigerant inlet 11a, through the central refrigerant channel 11, and out through the central refrigerant outlet 11b to the central branch return port 424. Finally, the refrigerant flows back in parallel from the external branch return port 423 and the central branch return port 424 to the refrigerant outlet channel, and then out through the main refrigerant outlet. This achieves simultaneous refrigerant supply to both the external and central refrigerant channels 11, resulting in higher heat exchange efficiency and better gas-liquid separation.

[0082] In some embodiments, multiple heat exchange and condensation mechanisms are used to connect one-to-one with the surfaces of multiple battery cells 100 equipped with explosion-proof valves 100a. For example... Figure 2 and Figure 3 As shown, each battery cell 100 has a separate heat exchange and condensation mechanism for its explosion-proof valve 100a. This mechanism can specifically cool down the gas-liquid mixture discharged after thermal runaway from each battery cell 100, resulting in good gas-liquid separation reliability. Moreover, each heat exchange and condensation mechanism is a module, which facilitates processing, transportation, and installation.

[0083] The number of heat exchange and condensation mechanisms can be selected based on the number of explosion-proof valves 100a. The battery cells 100 of the battery pack can be arranged in a parallel-multiple-series configuration; thus, the heat exchange and condensation mechanisms are spaced apart relative to the battery cells 100, i.e., one heat exchange and condensation mechanism is set for every other battery cell 100, such as... Figure 2The illustration shows a battery pack comprising four cells 100, with two heat exchange and condensation mechanisms arranged on one side of the pack. In practice, the number of heat exchange and condensation mechanisms can be increased based on the number of cells 100, with one mechanism added for every two cells 100. Optionally, the cells 100 of the battery pack can be arranged in a multi-parallel, multi-series configuration; for example, a two-parallel, multi-series arrangement. In this case, explosion-proof valves 100a are installed on every two adjacent cells 100. Two heat exchange and condensation mechanisms are then installed every two cells 100 (this configuration is not shown in the figure). These multiple heat exchange and condensation mechanisms can be detached and assembled, or they can be designed as an integrated unit according to the requirements of the battery pack.

[0084] In some embodiments, each heat exchange condensing mechanism has an input plate 41 and an output plate 43 connected to both sides of the refrigerant equalization plate 42. The input plate 41 is provided with an input channel 411 for inputting refrigerant into the main refrigerant inlet, and the input channel 411 is connected to the main refrigerant inlet. The output plate 43 is provided with an output channel 431 for outputting refrigerant from the main refrigerant outlet, and the output channel 431 is connected to the main refrigerant outlet. Figures 6-9 , Figure 13 , Figure 14 As shown, each refrigerant flow equalization plate 42 inputs refrigerant into the total refrigerant inlet of the refrigerant flow equalization plate 42 through the input channel 411 of its corresponding input plate 41, and outputs refrigerant from the total refrigerant outlet through the output channel 431 of its corresponding output plate 43. The connection between the refrigerant flow equalization plate 42 and other structures is achieved by relying on the input plate 41 and the output plate 43, which simplifies the structure of the refrigerant flow equalization plate.

[0085] In some embodiments, all refrigerant flow equalization plates 42 are assembled into a flow equalization plate assembly 4 via an input plate 41 and an output plate 43, and the input plate 41 and output plate 43 located between two adjacent refrigerant flow equalization plates 42 are integrated into a connecting plate module 44. All refrigerant flow equalization plates 42 are assembled into a flow equalization plate assembly 4 via the input plate 41 and output plate 43, and adjacent refrigerant flow equalization plates 42 are connected via the connecting plate module 44. The connecting plate module 44 is provided with an input channel 411 and an output channel 431; the input plate 41 is provided with an input channel 411; and the output plate 43 is provided with an output channel 431. In this way, the refrigerant flow equalization plate 42 and the connecting plate module 44 located in the middle position are modularized and can be used as universal components. For battery packs with different numbers of cells 100, the same set of input plates 41 and output plates 43 is used on both sides. The number of refrigerant flow equalization plates 42 and connecting plate modules 44 is adaptively selected according to the number of cells 100, which facilitates splicing and assembly, facilitates the replacement of universal components, and provides good overall structural strength. like Figure 14As shown, an example is given of a flow equalization plate assembly 4 consisting of two refrigerant flow equalization plates 42, an input plate 41, an output plate 43, and a connecting plate module 44, corresponding to two heat exchange and condensation mechanisms. The actual flow equalization plate assembly 4 can be configured by increasing or decreasing the number of refrigerant flow equalization plates 42 and connecting plate modules 44 according to the number of heat exchange and condensation mechanisms.

[0086] In some embodiments, such as Figures 15-18 As shown, the gas-liquid separation device also includes a gas-liquid separation mechanism, which includes a gas-liquid separation housing 3 with a gas-liquid separation chamber. The gas-liquid separation chamber has an air inlet 31 and an exhaust port. The air inlet 31 is connected to a fluid outlet, and the exhaust port is connected to the outside. At least one gas-liquid separation component is used to separate the gas-liquid mixture. The gas-liquid separation component is disposed in the gas-liquid separation chamber. The gas-liquid separation component includes: a liquid absorption structure 13 for adsorbing liquid; and a filter plate 9 for baffled separation of the gas-liquid mixture. The filter plate 9 is disposed on at least one side of the liquid absorption structure 13, and the filter plate 9 has multiple through holes for fluid to pass through.

[0087] When the battery cell 100 experiences thermal runaway, the gas-liquid mixture discharged from the explosion-proof valve 100a is cooled and condensed by the heat exchange and condensation mechanism. The separated gas is discharged from the fluid outlet of the heat exchange and condensation mechanism and enters the gas-liquid separation chamber through the air inlet 31 of the gas-liquid separation mechanism. Then, it flows through the liquid absorption structure 13 and filter plate 9 of the gas-liquid separation component in the gas-liquid separation chamber and is discharged from the exhaust port.

[0088] It should be noted that the principle of gas-liquid separation using baffle separation is as follows: due to the difference in specific gravity between gas and liquid, when liquid and gas are mixed and flowing together, if they encounter an obstruction, the gas will be deflected and flow away, while the liquid, due to inertia, continues to have a forward velocity. The forward-moving liquid adheres to the obstruction wall and converges downwards due to gravity. Therefore, the filter plate 9 can obstruct the gas-liquid mixture in the gas-liquid separation chamber, allowing the gas to carry a portion of the liquid through, while a portion of the liquid is blocked and adheres to the filter plate 9, thus separating a portion of the liquid from the gas-liquid mixture.

[0089] The gas-liquid separation component can separate the gas-liquid mixture through the filter plate 9 to retain a portion of the liquid in the gas-liquid mixture, reducing the liquid content of the gas-liquid mixture entering the through hole; at the same time, the liquid adsorption structure 13 adsorbs the liquid to retain the liquid in the gas-liquid mixture, reducing the liquid content in the gas-liquid mixture, thus achieving gas-liquid separation; in this way, the gas-liquid mixture generated after thermal runaway of the battery cell 100 undergoes primary gas-liquid separation through cooling and secondary gas-liquid separation by the gas-liquid separation mechanism, which can improve the gas-liquid separation effect; the separated gas is discharged outside the battery pack, while the separated liquid is retained and not discharged outside the battery pack, avoiding the formation of smoke from complex reactions in the gas-liquid mixture, achieving the technical effect of only venting gas and not venting smoke after thermal runaway of the battery pack, and further improving the effect of large-scale smoke emission after thermal runaway of the battery cell 100.

[0090] For example, filter plate 9 can be positioned on the flow-facing side of the liquid absorption structure 13 near the air inlet 31 or on the flow-reverse side near the exhaust port. In this case, the gas-liquid separation assembly is a single-layer filter plate structure, which is relatively simple and can perform single-pass flow separation of the gas-liquid mixture. Another example is... Figures 15-18 As shown, the filter plate 9 can be set on the front and back sides of the liquid absorption structure 13. At this time, the gas-liquid separation component is a double-layer filter plate structure. When the gas-liquid mixture in the gas-liquid separation chamber flows through a gas-liquid separation component, it flows through a layer of filter plate 9, the liquid absorption structure 13 and another layer of filter plate 9 in sequence, and flows to the exhaust port. In this way, the gas-liquid mixture can be separated by two deflection separations, and the deflection separation effect is better.

[0091] In addition, condensation occurs during the flow of the gas-liquid mixture in the gas-liquid separation chamber, achieving a certain gas-liquid separation effect and reducing the amount of flue gas emitted, thus mitigating safety hazards. The liquid-absorbing structure 13 can be an organic polymer material, such as porous absorbent foam, which exhibits good resistance to high temperatures and good water absorption capacity, facilitating the adsorption of electrolyte. Alternatively, the liquid-absorbing structure 13 can be an inorganic non-metallic material, such as graphene; or a special fiber, such as fluoropolymer fiber or polyimide fiber; all possess excellent water absorption and resistance properties, enabling them to adsorb electrolyte.

[0092] Optionally, there can be multiple gas-liquid separation components, arranged sequentially along the cell arrangement direction 100 of the battery pack; such as Figure 16 and Figure 18As shown, the gas-liquid separation mechanism includes three gas-liquid separation components, but other numbers, such as two or four, can also be used. The gas-liquid separation components have two filter plates 9, forming a double-layer porous filter plate, located on both sides of the liquid absorption structure 13, resulting in better gas-liquid separation. The gas-liquid separation mechanism can achieve multi-stage physical filtration, and combined with the cooling of the heat exchange and condensation mechanism, it can achieve complete gas-liquid separation of the mixture. In this way, the liquid separated by the heat exchange and condensation mechanism is retained inside the heat exchange shell, while the separated gas enters the next stage of the gas-liquid separation mechanism. After multiple filtrations by the gas-liquid separation mechanism, the separated gas finally flows out of the pack, achieving the effect of only expelling gas and not smoke during battery pack thermal runaway.

[0093] In some embodiments, the gas-liquid separator housing 3 includes a top plate 3a, a bottom plate 3b, a first vertical plate 3c, and a second vertical plate 3d, which cooperate to form a central cavity; a first support plate 5 is disposed within the central cavity, and the first support plate 5, top plate 3a, first vertical plate 3c, and second vertical plate 3d cooperate to form a gas-liquid separation chamber, with an air inlet 31 disposed on the first vertical plate 3c, and the gas-liquid separation assembly disposed on the first support plate 5. Figure 6 As shown, the upper part of the central cavity of the gas-liquid separation housing 3 is separated by the first support plate 5 to serve as the gas-liquid separation chamber. The first support plate 5 can improve the strength of the gas-liquid separation housing 3 and the stability of the gas-liquid separation assembly, thereby ensuring the reliability of operation.

[0094] In some embodiments, the gas-liquid separation mechanism further includes a second support plate 7 disposed in the central cavity, the second support plate 7 being located between the first support plate 5 and the bottom plate 3b; a baffle plate 6 disposed between the first support plate 5 and the second support plate 7, the baffle plate 6 dividing the cavity between the first support plate 5 and the second support plate 7 into an upper refrigerant channel S1 and a lower refrigerant channel S2, the upper refrigerant channel S1 having an inlet for connecting to a refrigerant supply pipe, and the lower refrigerant channel S2 having an outlet for connecting to a refrigerant return pipe; wherein, the first vertical plate 3c is provided with a refrigerant outlet interface 32 and a refrigerant return port interface 33, the refrigerant outlet interface 32 connecting the upper refrigerant channel S1 and the refrigerant inlet of the refrigerant channel, and the refrigerant return port interface 33 connecting the refrigerant outlet of the refrigerant channel and the lower refrigerant channel S2.

[0095] The gas-liquid separation mechanism, through the first support plate 5, the second support plate 7, and the baffle plate 6, in conjunction with the first vertical plate 3c and the second vertical plate 3d, forms an upper refrigerant channel S1 and a lower refrigerant channel S2. In application, the inlet of the upper refrigerant channel S1 is connected to the refrigerant supply pipe, and the outlet of the lower refrigerant channel S2 is connected to the refrigerant return pipe. When the battery cell 100 experiences thermal runaway, the gas-liquid mixture discharged from the explosion-proof valve 100a, after being separated by the heat exchange and condensation mechanism, enters the gas-liquid separation chamber. The refrigerant in the upper refrigerant channel S1 and the lower refrigerant channel S2 can further cool and de-temperature the gas, condensing it to separate the liquid and further improving the gas-liquid separation effect.

[0096] Optionally, the upper refrigerant channel S1 and the lower refrigerant channel S2 are connected to the refrigerant channels of the heat exchange shell through the first vertical plate 3c and the flow equalization plate assembly 4; for example, such as Figure 6 , Figure 9 , Figure 14 , Figure 15 As shown, the first vertical plate 3c is plugged into the input plate 41 and output plate 43 of the flow equalization plate assembly 4, which facilitates disassembly and assembly. The plug-in structure also integrates the connection of the refrigerant flow path, simplifying the structure. When the battery pack experiences thermal runaway, refrigerant, such as cold water in the battery pack water tank, enters the inlet of the upper refrigerant flow channel S1 through the refrigerant supply pipe. It flows through the upper refrigerant flow channel S1 and through the refrigerant outlet interface 32 of the first vertical plate 3c. After passing through the flow equalization plate assembly 4, it flows into the refrigerant flow channel of the heat exchange shell 2 and the heat exchange partition 1. After exchanging heat with the gas-liquid mixture flowing in the condensation flow channel, it flows out through the refrigerant flow channel of the heat exchange shell 2 and the heat exchange partition 1, and flows back through the flow equalization plate assembly 4. Then, it flows back to the lower refrigerant flow channel S2 through the refrigerant return port interface 33 of the first vertical plate 3c. Finally, it flows back to the refrigerant return pipe through the outlet of the lower refrigerant flow channel S2, completing the refrigeration cycle of the battery pack system and removing the temperature of the high-temperature flue gas mixture. At the same time, the high-temperature gaseous and liquid mixed flue gas ejected from the explosion-proof valve 100a of the battery cell 100 enters the condensation channel through the fluid inlet of the heat exchange shell and flows into the gas-liquid separation chamber of the gas-liquid separation mechanism through the fluid outlet; after the flue gas is filtered multiple times by the gas-liquid separation component, the separated gas finally flows out of the pack, achieving the effect of only spraying gas and not spraying smoke in the thermal runaway of the battery pack.

[0097] Optionally, the gas-liquid separation housing 3 can be a side beam of the battery pack. Utilizing the side beam itself as the gas-liquid separation housing 3 reduces the number of parts and the space occupied, while also saving costs. The exhaust port of the gas-liquid separation housing 3 can be located at one end of the long side of the side beam, extending the flow path of the gas-liquid mixture within the side beam and optimizing the gas-liquid separation effect.

[0098] In some embodiments, a liquid storage chamber is provided at the bottom of the gas-liquid separation housing 3; the gas-liquid separation chamber has a drain port, which is located below the liquid absorption structure 13 and communicates with the liquid storage chamber through the drain conduit 10. Optionally, a third support plate 8 is also provided in the central cavity, located between the second support plate 7 and the bottom plate 3b, and the third support plate 8 cooperates with the first vertical plate 3c and the second vertical plate 3d to form a liquid storage chamber; or a liquid storage chamber is formed at the bottom of the gas-liquid separation housing 3. When the liquid adsorbed by the liquid absorption structure 13 exceeds the liquid absorption capacity, the liquid overflowing under the pressure of the subsequently flowing gas can flow through the drain port, through the drain conduit 10, and into the liquid storage chamber, reducing the amount of liquid in the gas-liquid separation chamber, preventing the airflow from carrying liquid again and affecting the gas-liquid separation effect, and achieving the result of only spraying gas and not emitting smoke in the thermal runaway of the battery pack.

[0099] This application also provides a battery pack, including multiple battery cells 100 and a gas-liquid separation device connected to the outlet of an explosion-proof valve 100a of the battery cells 100. The gas-liquid separation device is the same as the one provided in any of the above embodiments. It can solve the problem of excessive smoke emission after thermal runaway of the battery cells 100, reducing safety hazards. Its advantages are brought about by the gas-liquid separation device, and for details, please refer to the relevant parts in the above embodiments, which will not be repeated here. For example, the battery pack can be blade-shaped, square, or other forms.

[0100] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details of the above application are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0101] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Unless otherwise defined, the technical or scientific terms used in the claims and description should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar words used in the patent application description and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar words mean that the element or object preceding "comprising" or "including" encompasses the element or object listed following "comprising" or "including" and its equivalents, and do not exclude other elements or objects. The terms "connected," "coupled," or "linked" and similar words are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections. Words such as “including,” “contains,” and “has” are open-ended words that mean “including but not limited to” and can be used interchangeably with them.

[0102] In this application, the terms "or" and "and / or" describe the relationship between related objects and indicate a non-exclusive inclusion. For example, "A and / or B" and "A or B" can include: only "A" exists, only "B" exists, and both "A" and "B" exist simultaneously, where "A" and "B" can be singular or plural. As another example, "A, B, and / or C" and "A, B, or C" can include: only "A" exists, only "B" exists, only "C" exists, both "A" and "B" exist simultaneously, both "A" and "C" exist simultaneously, both "B" and "C" exist simultaneously, and both "A", "B", and "C" exist simultaneously, where "A", "B", and "C" can be singular or plural. Furthermore, the symbol " / " in this application indicates an "or" relationship between the related objects before and after the symbol. In this application, the term "at least one A or B" has the same meaning as the aforementioned "A or B". The term "at least one A, B or C" has the same meaning as "A, B or C" above.

[0103] In the apparatus and equipment of this application, the components can be disassembled and / or reassembled. These disassemblies and / or reassemblies should be considered as equivalent solutions of this application.

[0104] The above description of the claimed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be applied within the widest scope consistent with the principles and novel features of this application.

[0105] The above description has been given for illustrative and descriptive purposes. Furthermore, this description is not intended to limit the embodiments of this application to the forms described herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A gas-liquid separation device, characterized in that, It includes at least one heat exchange condensation mechanism for condensing a gas-liquid mixture, the heat exchange condensation mechanism including a heat exchange shell, the heat exchange shell being provided with a condensation flow channel and a refrigerant flow channel; The condensation channel has a fluid inlet and a fluid outlet. The fluid inlet is used to communicate with the explosion-proof valve outlet of the battery cell and is sealed to the outer wall of the battery cell. The fluid outlet is used to discharge gas. The refrigerant channel has a refrigerant inlet for refrigerant to flow in and a refrigerant outlet for refrigerant to flow out.

2. The gas-liquid separation device according to claim 1, characterized in that, The heat exchange housing includes: A heat exchange shell, on which an external refrigerant flow channel is provided; A heat exchange baffle is disposed in the heat exchange shell, the heat exchange baffle divides the condensation channel into a first condensation channel and a second condensation channel, and a central refrigerant channel is provided on the heat exchange baffle; The refrigerant flow channel includes the external refrigerant flow channel and the central refrigerant flow channel.

3. The gas-liquid separation device according to claim 2, characterized in that, The heat exchange housing includes a first side plate and a second side plate for sealing connection with the surface of the cell where the explosion-proof valve is located, and the external refrigerant flow channel includes a first external refrigerant flow channel opened on the first side plate and a second external refrigerant flow channel opened on the second side plate.

4. The gas-liquid separation device according to claim 2, characterized in that, The heat exchange baffle has a clearance gap between the flow-facing surface of the heat exchange baffle and the fluid inlet, and the flow-facing surface is a gradually expanding guide surface along the flow direction of the fluid inlet. The heat exchange baffle divides the fluid outlet into a first fluid outlet and a second fluid outlet. The first condensation channel is connected between the fluid inlet and the first fluid outlet, and the second condensation channel is connected between the fluid inlet and the second fluid outlet.

5. The gas-liquid separation device according to claim 2, characterized in that, The external refrigerant channel has an external refrigerant inlet and an external refrigerant outlet; the central refrigerant channel has a central refrigerant inlet and a central refrigerant outlet; The heat exchange and condensation mechanism also includes a refrigerant flow equalization plate, which is provided with a refrigerant inlet channel and a refrigerant outlet channel. The refrigerant inlet channel has a total refrigerant inlet, an external branch outlet, and a middle branch outlet. The refrigerant outlet channel has a total refrigerant outlet, an external branch return outlet, and a middle branch return outlet. The external branch outlet is connected to the external refrigerant inlet, and the external branch return port is connected to the external refrigerant outlet; the middle branch outlet is connected to the middle refrigerant inlet, and the middle branch return port is connected to the middle refrigerant outlet.

6. The gas-liquid separation device according to claim 5, characterized in that, The heat exchange and condensation mechanism comprises multiple units, which are used to connect one-to-one with the surfaces of multiple battery cells equipped with explosion-proof valves; Each heat exchange and condensation mechanism has an input plate and an output plate connected to both sides of the refrigerant flow equalization plate. The input plate is provided with an input channel for inputting refrigerant into the main refrigerant inlet, and the input channel is connected to the main refrigerant inlet. The output plate is provided with an output channel for outputting refrigerant from the main refrigerant outlet, and the output channel is connected to the main refrigerant outlet. All of the refrigerant flow equalization plates are assembled into a flow equalization plate assembly through the input plate and the output plate, and the input plate and the output plate located between two adjacent refrigerant flow equalization plates are integrated into a connecting plate module.

7. The gas-liquid separation device according to any one of claims 1-6, characterized in that, It also includes a gas-liquid separation mechanism, which comprises: A gas-liquid separation shell having a gas-liquid separation chamber, the gas-liquid separation chamber having an air inlet and an air outlet, the air inlet being connected to the fluid outlet, and the air outlet being connected to the outside; At least one gas-liquid separation component is provided for gas-liquid separation of a gas-liquid mixture, the gas-liquid separation component being disposed in the gas-liquid separation chamber; The gas-liquid separation component includes: Liquid-absorbing structure, used to adsorb liquid; A filter plate is used to separate gas-liquid mixtures by deflection. The filter plate is disposed on at least one side of the liquid absorption structure and has multiple through holes for fluid to pass through.

8. The gas-liquid separation device according to claim 7, characterized in that, The gas-liquid separation housing includes a top plate, a bottom plate, a first vertical plate, and a second vertical plate, which together form a central cavity. A first support plate is provided inside the central cavity. The first support plate, the top plate, the first vertical plate, and the second vertical plate together form the gas-liquid separation chamber. The air inlet is provided on the first vertical plate, and the gas-liquid separation assembly is provided on the first support plate.

9. The gas-liquid separation device according to claim 8, characterized in that, The gas-liquid separation mechanism further includes: A second support plate is disposed within the central cavity, and the second support plate is located between the first support plate and the bottom plate; A baffle plate is disposed between the first support plate and the second support plate. The baffle plate divides the cavity between the first support plate and the second support plate into an upper refrigerant channel and a lower refrigerant channel. The upper refrigerant channel has an inlet for connecting to a refrigerant supply pipe, and the lower refrigerant channel has an outlet for connecting to a refrigerant return pipe. The first upright plate is provided with a refrigerant outlet interface and a refrigerant return interface. The refrigerant outlet interface connects the upper refrigerant channel with the refrigerant inlet of the refrigerant channel, and the refrigerant return interface connects the refrigerant outlet of the refrigerant channel with the lower refrigerant channel.

10. The gas-liquid separation device according to claim 7, characterized in that, A liquid storage tank is provided at the bottom of the gas-liquid separator shell; The gas-liquid separation chamber has a drain port, which is located on the lower side of the liquid absorption structure and is connected to the liquid storage tank through a drain conduit.

11. A battery pack, characterized in that, The device includes multiple battery cells and a gas-liquid separation device connected to the outlet of an explosion-proof valve of the battery cells, wherein the gas-liquid separation device is the gas-liquid separation device as described in any one of claims 1-10.

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