Integrated liquid cooling plate and efficient pressure relief type battery pack

Abstract

The invention relates to an integrated liquid cooling plate and an efficient pressure relief type battery pack. The integrated liquid cooling plate comprises a liquid cooling plate body, and a pressure relief and smoke exhaust flow channel and a cooling channel are arranged in the liquid cooling plate body; according to the integrated liquid cooling plate and the efficient pressure relief type battery pack, the design is ingenious, the multiple pressure relief and smoke exhaust flow channels distributed at intervals and the cooling channels arranged around the pressure relief and smoke exhaust flow channels are integrally designed on the liquid cooling plate body, so that the pressure relief and smoke exhaust flow channels are formed in the liquid cooling plate body, and the pressure relief and smoke exhaust flow channels are formed in the liquid cooling plate body while gas is exhausted for pressure relief; the cooling system is simple in structure and low in cost, work of the cooling system is not affected, the heat dissipation efficiency and safety are improved, the structural layout is optimized, the stability and adaptability of the heat dissipation system are enhanced, and a more reliable and efficient safe heat dissipation mode is provided for a new energy automobile battery.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and more specifically, to an integrated liquid cooling plate and a high-efficiency pressure-relieving battery pack. Background Art

[0002] With the rapid development of new energy vehicles, as the core component, the performance and safety of power batteries have attracted much attention. During the operation of the battery, a large amount of heat is generated. If the heat cannot be dissipated in a timely and effective manner, it will cause the battery temperature to rise, which will in turn affect the performance and lifespan of the battery and even pose safety hazards. Therefore, an efficient battery thermal management system is crucial for new energy vehicles.

[0003] As an efficient heat dissipation method, liquid cooling technology is widely used in the battery thermal management system of new energy vehicles. As the core component of the liquid cooling system for new energy batteries, the structural design and performance of the liquid cooling plate directly affect the heat dissipation effect of the battery.

[0004] Traditional liquid cooling plates usually adopt a single-channel design, and the coolant flows through a single channel to cool the battery. However, there are some problems with the existing liquid cooling plates. On the one hand, the cooling effect is limited and it is difficult to meet the heat dissipation requirements of high-power batteries. On the other hand, high-pressure gas is generated during the high-heat process of the battery. If it cannot be discharged in a timely manner, it may pose safety hazards to the battery and the surrounding environment. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an integrated liquid cooling plate and a high-efficiency pressure-relieving battery pack in view of the above-mentioned defects of the prior art.

[0006] On the one hand, the technical solution adopted by the present invention to solve its technical problems is: an integrated liquid cooling plate, including a liquid cooling plate body, wherein a plurality of spaced-apart pressure-relieving and smoke-exhaust channels are arranged in the liquid cooling plate body; at least one sub-liquid cooling channel is arranged around the outside of the pressure-relieving and smoke-exhaust channels; the plurality of sub-liquid cooling channels are connected in sequence; a main channel is further arranged on one side of the pressure-relieving and smoke-exhaust channels, and the plurality of sub-liquid cooling channels are connected to the main channel through branch channels to form a cooling channel; water inlets and outlets connected to the cooling channel are arranged on the liquid cooling plate body.

[0007] In the integrated liquid cooling plate of the present invention, the liquid cooling plate body includes a liquid cooling channel plate and a liquid cooling flat plate fixedly connected to the liquid cooling channel plate; the pressure-relieving and smoke-exhaust channels, the sub-liquid cooling channels, the branch channels and the main channel are all integrally arranged on the liquid cooling channel plate.

[0008] The integrated liquid cooling plate according to the present invention, wherein a plurality of pressure relief areas corresponding to the pressure relief and smoke exhaust channels one by one are provided on the liquid cooling flat plate; at least one first through hole communicating with the pressure relief and smoke exhaust channel is provided in the pressure relief area.

[0009] The integrated liquid cooling plate according to the present invention, wherein a plurality of second through holes are provided on the inner bottom surface of the pressure relief and smoke exhaust channel along its length direction; a plurality of fusible sheets corresponding to the pressure relief and smoke exhaust channels one by one are provided on the bottom surface of the liquid cooling flat plate; the fusible sheets are used to cover all the second through holes corresponding to the pressure relief and smoke exhaust channels.

[0010] The integrated liquid cooling plate according to the present invention, wherein the larger the cross-sectional area of the pressure relief and smoke exhaust channel is, the greater the evacuation capacity of the pressure relief and smoke exhaust channel is.

[0011] On the other hand, the present invention also provides a highly efficient pressure relief type battery pack, which includes a battery protection box body, a battery module is arranged in the battery protection box body, and the integrated liquid cooling plate as described in any one of the above; the integrated liquid cooling plate is arranged on one side of the battery module; the cooling channels on the integrated liquid cooling plate are used to cool the battery module; the pressure relief and smoke exhaust channels on the integrated liquid cooling plate are used to accelerate the discharge of the internal pressure of the battery module.

[0012] The highly efficient pressure relief type battery pack according to the present invention, wherein a plurality of gaskets corresponding to the pressure relief and smoke exhaust channels one by one are further provided between the integrated liquid cooling plate and the battery module; at least one third through hole communicating with the pressure relief and smoke exhaust channel is provided on the gasket; the pressure relief port on the battery module is connected to the pressure relief and smoke exhaust channel through the third through hole.

[0013] The highly efficient pressure relief type battery pack according to the present invention, wherein the battery protection box body includes an upper cover, a mounting frame and a bottom plate; the upper cover, the mounting frame and the bottom plate enclose to form a containing cavity; the battery module and the integrated liquid cooling plate are sequentially installed in the containing cavity from top to bottom; the bottom plate is recessed downward corresponding to the middle of the integrated liquid cooling plate, so that a pressure relief and buffer space is formed between the bottom plate and the integrated liquid cooling plate.

[0014] The highly efficient pressure relief type battery pack according to the present invention, wherein the volume of the pressure relief and buffer space is larger than the total volume of the spaces of all the pressure relief and smoke exhaust channels.

[0015] The high-efficiency pressure-relief type battery pack described in the present invention, wherein the mounting frame includes a pressure-relief type pipe provided at one end of the pressure-relief and smoke exhaust flow channel; at least one pressure-relief channel is provided in the pressure-relief type pipe; a fourth through hole communicating the pressure-relief channel with the pressure-relief and smoke exhaust flow channel is provided at the bottom of the pressure-relief type pipe; when multiple pressure-relief channels are provided, adjacent two pressure-relief channels are connected and communicated through a ventilation hole; a fifth through hole communicating with the pressure-relief channel is provided on the outer surface of the pressure-relief type pipe, and an explosion-proof valve is installed on the fifth through hole.

[0016] The beneficial effects of the present invention are as follows: The integrated liquid cooling plate and the high-efficiency pressure-relief type battery pack are ingeniously designed. By integrally designing multiple spaced-apart pressure-relief and smoke exhaust flow channels on the liquid cooling plate body, and cooling channels arranged around the pressure-relief and smoke exhaust flow channels, while exhausting gas and relieving pressure, it does not affect the normal operation of the cooling system. It not only improves the heat dissipation efficiency and safety, but also optimizes the structural layout, enhances the stability and adaptability of the heat dissipation system, and provides a more reliable and efficient safety heat dissipation method for new energy vehicle batteries; through multiple pressure-relief and smoke exhaust flow channels, the high-pressure gas generated during battery failure can be effectively discharged in time, improving battery safety; through the sequential connection of multiple sub-liquid cooling channels, the flow path of the coolant is extended, the heat dissipation efficiency is improved, and it is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present invention in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0018] Figure 1 It is a three-dimensional exploded view of the integrated liquid cooling plate 10 in Embodiment 1 of the present invention.

[0019] Figure 2 is Figure 1 The front view of the liquid cooling channel plate 111 in it.

[0020] Figure 3 is Figure 1 The cross-sectional view of the liquid cooling channel plate 111 in it.

[0021] Figure 4 It is a structural schematic diagram of the high-efficiency pressure-relief type battery pack in Embodiment 2 of the present invention.

[0022] Figure 5 is Figure 4 The cross-sectional view taken along A-A in it;

[0023] Figure 6 is Figure 5 The enlarged view at D in it.

[0024] Figure 7 is Figure 4 The three-dimensional exploded view of the high-efficiency pressure-relief battery pack in

[0025] Figure 8 is Figure 7 The structural schematic diagram of the pressure-relief pipe 221 in Specific embodiments

[0026] Terms such as "first", "second", "third", and "fourth" in the description, claims, and drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0027] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] "Plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0029] Moreover, terms indicating directions such as "upper, lower, front, rear, left, right, upper end, lower end, longitudinal" etc. are all referenced based on the attitude position of the device or equipment described in this solution when it is in normal use.

[0030] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] 1. Embodiment 1:

[0032] An integrated liquid cooling plate 10 according to a preferred embodiment of the present invention is as follows Figures 1-3 shown, which includes a liquid cooling plate body 11. A plurality of pressure relief and smoke exhaust channels 12 are arranged at intervals inside the liquid cooling plate body 11. When an abnormality occurs in the battery, such as thermal runaway, the pressure relief and smoke exhaust channels 12 can quickly discharge the internal high-pressure gas, reduce the internal pressure, and prevent battery explosion or fire accidents; at least one sub-liquid cooling channel 13 is arranged around the outside of the pressure relief and smoke exhaust channels 12; in one embodiment, the heads and tails of a plurality of sub-liquid cooling channels 13 are connected in sequence to form a serpentine cooling channel; the flow area of the coolant is increased, which helps to absorb and conduct heat more quickly; optionally, the first sub-liquid cooling channel 13 and the last sub-liquid cooling channel 13 are connected through a main channel 131 to form a reflux cooling channel, so that the heat distribution is more uniform and the phenomenon of local overheating is avoided. A plurality of sub-liquid cooling channels 13 are connected to the main channel 131 through branch channels 132; both the main channel 131 and the branch channels 132 are located on the same side of the pressure relief and smoke exhaust channels 12, and the structure is more compact, reducing the space occupation; water inlets and outlets connected to the main channel 131 are provided on the liquid cooling plate body 11.

[0033] The integrated liquid cooling plate and the high-efficiency pressure relief type battery pack are ingeniously designed. By integrally designing a plurality of pressure relief and smoke exhaust channels arranged at intervals on the liquid cooling plate body, and the cooling channels arranged around the pressure relief and smoke exhaust channels, gas can be discharged for pressure relief while not affecting the normal operation of the cooling system. It not only improves the heat dissipation efficiency and safety, but also optimizes the structural layout, enhances the stability and adaptability of the cooling system, and provides a more reliable and efficient safety heat dissipation method for new energy vehicle batteries; through a plurality of pressure relief and smoke exhaust channels, the high-pressure gas generated during battery failure can be effectively discharged in time, improving battery safety; by connecting the heads and tails of a plurality of sub-liquid cooling channels in sequence to form a serpentine cooling channel, the flow path of the coolant is extended, improving the heat dissipation efficiency; the first sub-liquid cooling channel and the last sub-liquid cooling channel are connected through the main channel to form a reflux cooling channel, ensuring uniform flow of the coolant and making the battery temperature uniform.

[0034] Further, the liquid cooling plate body 11 includes a liquid cooling channel plate 111 and a liquid cooling flat plate 112 fixedly connected to the liquid cooling channel plate 111; the liquid cooling channel plate 111 is responsible for forming the flow path of the coolant, and the liquid cooling flat plate 112 serves as the main surface for heat exchange with the battery; the pressure relief and smoke exhaust channels 12, the sub-liquid cooling channels 13, the branch channels 132, and the main channel 131 are all integrally arranged on the liquid cooling channel plate 111. In this embodiment, the liquid cooling channel plate and the liquid cooling flat plate are closely attached, and heat can be more directly transferred from the liquid cooling flat plate to the liquid cooling channel and then taken away by the coolant, improving the heat conduction efficiency;

[0035] Furthermore, multiple pressure relief zones corresponding to the pressure relief and smoke exhaust channels 12 are provided on the liquid cooling plate 112; at least one first through hole 1121 communicating with the pressure relief and smoke exhaust channel 12 is provided in the pressure relief zone. When the battery generates high heat and produces high-pressure gas or smoke, it can be discharged into the pressure relief and smoke exhaust channel 12 through the multiple first through holes 1121 and then discharged outward along the pressure relief channel to prevent potential explosion risks.

[0036] Furthermore, a plurality of second through holes 121 are provided on the inner bottom surface of the pressure relief and smoke exhaust channel 12 along its length direction; in order to prevent moisture in the external air from directly eroding the battery explosion-proof valve inside the liquid cooling plate and causing serious damage, a plurality of fusible sheets 14 corresponding to the pressure relief and smoke exhaust channels 12 are provided on the bottom surface of the liquid cooling plate 112; the fusible sheet 14 can be a fusible material such as a film or a thin sheet in the prior art. The fusible sheet 14 is used to cover all the second through holes 121 of the corresponding pressure relief and smoke exhaust channel 12; the fusible sheet 14 usually remains closed to prevent external gas of the battery from entering; for example, when the battery undergoes thermal runaway, the gas ejected outward has a temperature of about 300 °C or above, which will melt or soften the fusible sheet 14, so that the second through hole 121 is opened, thereby realizing a further pressure relief function.

[0037] Furthermore; the third through hole 41 is correspondingly arranged with the first through hole 1121; as Figure 3 shown, the functional relationship between the cross-section of the pressure relief and smoke exhaust channel 12 and its depth, width, and draft angle is:

[0038] S = f(W, H, θ);

[0039] wherein, S represents the cross-section of the pressure relief and smoke exhaust channel 12; W represents the maximum width of the upper opening of the pressure relief and smoke exhaust channel 12; H represents the stamping depth of the pressure relief and smoke exhaust channel 12; θ represents the stamping draft angle of the pressure relief and smoke exhaust channel 12; f represents a coefficient;

[0040] The larger the cross-section S of the pressure relief and smoke exhaust channel 12, the greater the evacuation capacity of the pressure relief and smoke exhaust channel 12; it helps to quickly discharge heat and gas, thereby improving the efficiency of the entire heat dissipation system.

[0041] By changing the values of W, H, and θ, and then adjusting the cross-sectional size (S) of the pressure relief and smoke exhaust channel 12, a pressure relief and smoke exhaust channel adapted to different working conditions and pressure requirements can be designed, which can optimize the pressure relief effect and ensure that gas can be effectively evacuated when the pressure rises to prevent system overpressure.

[0042] 2. Embodiment Two:

[0043] An efficient pressure relief type battery pack, such as Figures 4-7As shown in the figure, it includes a battery protection box body 20, a battery module 30 is arranged inside the battery protection box body 20, and the integrated liquid cooling plate 10 as described in the first embodiment; the specific structure of the integrated liquid cooling plate 10 will not be elaborated here. The integrated liquid cooling plate 10 is arranged on one side of the battery module 30; the cooling channels on the integrated liquid cooling plate 10 are used to cool down the battery module 30 to avoid overheating of the battery module; the pressure relief and smoke exhaust channel 12 on the integrated liquid cooling plate 10 is used to accelerate the discharge of the internal pressure of the battery module 30. When the internal pressure of the battery module rises abnormally, it can quickly release the pressure to prevent the battery pack from deforming or exploding due to excessive pressure. Through the integrated liquid cooling plate with dual functions of heat dissipation and pressure relief, it can ensure that the battery works within the optimal temperature range, thereby improving the performance and lifespan of the battery and making it safer to use.

[0044] This highly efficient pressure relief type battery pack is ingeniously designed. By integrally designing multiple spaced pressure relief and smoke exhaust channels on the liquid cooling plate body and cooling channels arranged around the pressure relief and smoke exhaust channels, it can discharge gas and relieve pressure while not affecting the normal operation of the cooling system. It not only improves the heat dissipation efficiency and safety, but also optimizes the structural layout, enhances the stability and adaptability of the cooling system, and provides a more reliable and efficient safety heat dissipation method for new energy vehicle batteries; through multiple pressure relief and smoke exhaust channels, the high-pressure gas generated during battery failures can be effectively discharged in a timely manner, improving battery safety.

[0045] Furthermore, multiple gaskets 40 corresponding to the pressure relief and smoke exhaust channels 12 one by one are provided between the integrated liquid cooling plate 10 and the battery module 30; the gaskets 40 can fill the gap between the liquid cooling plate and the battery module, leaving a buffer gap between the liquid cooling plate and the battery module to maintain the structural stability of the entire battery pack; at least one third through hole 41 communicating with the pressure relief and smoke exhaust channel 12 is provided on the gasket 40; in one embodiment, multiple third through holes 41 are provided, and the multiple third through holes 41 communicate with multiple second through holes 121 on the pressure relief and smoke exhaust channel 12 one by one. The pressure relief port at the bottom of the battery module 30 is connected to the pressure relief and smoke exhaust channel 12 through the third through hole 41, providing a direct discharge path for the internal pressure of the battery module 30, thereby accelerating the release of pressure and improving the pressure relief efficiency.

[0046] Furthermore, the battery protection box body 20 includes an upper cover 21, a mounting frame 22, and a bottom plate 23; the upper cover 21, the mounting frame 22, and the bottom plate 23 enclose to form a receiving cavity; the battery module 30 and the integrated liquid cooling plate 10 are sequentially installed in the receiving cavity from top to bottom; optionally, in order to ensure the internal sealing of the battery protection box body, sealing rings 01 are provided between the upper cover 21 and the mounting frame 22 and between the mounting frame 22 and the bottom plate 23 to prevent external moisture, dust, or other impurities from entering the battery pack and protect the battery module from environmental influences. As Figure 6As shown, the bottom plate 23 is recessed downward corresponding to the middle part of the integrated liquid cooling plate 10, so that a pressure relief buffer space 24 is formed between the bottom plate 23 and the integrated liquid cooling plate 10, which can be used for buffering required by mechanical safety and assembly; when the internal pressure of the battery module rises abnormally, the fusible sheet 14 on the liquid cooling plate is melted through or softened, the second through hole is opened, and after the core explosion-proof valve fragment on the battery module pierces the fusible sheet 14, the solid waste remains in the pressure relief buffer space, and at the same time, the pressure relief gas is separated from the solid waste and discharged outward along the pressure relief path. Further, the pressure relief buffer space 24 can also provide additional buffering to prevent the pressure from directly acting on the liquid cooling plate or the battery module, reducing the risk of damage; it can also reduce the impact of pressure fluctuations on the liquid cooling plate, the battery module and other electronic components when an external object collides with the battery protection box body.

[0047] Further, the volume of the pressure relief buffer space 24 is larger than the total volume of the spaces of all the pressure relief and smoke exhaust channels 12. The relatively large volume of the pressure relief buffer space 24 can not only accommodate more gas, extend the time of the pressure relief process, make the pressure release more gentle, help prevent damage caused by rapid pressure relief, thus providing a larger pressure relief capacity and enhancing the overall pressure relief ability when the internal pressure of the battery module rises abnormally; it can also protect the battery module from mechanical damage caused by pressure fluctuations and extend the service life of the battery module.

[0048] When thermal runaway of the battery occurs, the internal pressure decreases, and the internal pressure of the battery module's core is discharged more efficiently and quickly. At the same time, it is beneficial to attenuate and inhibit the intensity of the core thermal runaway reaction.

[0049] Further, the mounting frame 22 includes a pressure relief type pipe 221 provided at one end of the pressure relief and smoke exhaust channel 12; as Figure 6 and Figure 8 shown, at least one pressure relief channel 222 is provided in the pressure relief type pipe 221; a fourth through hole 223 connecting the pressure relief channel 222 and the pressure relief and smoke exhaust channel 12 is provided at the bottom of the pressure relief type pipe 221; optionally, when a plurality of pressure relief channels 222 are arranged side by side; adjacent two pressure relief channels 222 are connected through a vent hole 224. A fifth through hole communicating with the pressure relief channel 222 is provided on the outer surface of the pressure relief type pipe 221, and an explosion-proof valve 225 is installed on the fifth through hole. The explosion-proof valve 225 can automatically open when the pressure exceeds the safety threshold to release the internal pressure of the battery. Through this pressure relief path, the pressure relief ability of the whole battery can be enhanced, the excess pressure can be quickly released outward when the pressure is abnormal, and the battery module can be protected from damage caused by excessive internal pressure.

[0050] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. An integrated liquid cooling plate, comprising a liquid cooling plate body, characterized in that: A plurality of pressure relief and smoke exhaust flow channels are arranged in the body of the liquid cooling plate at intervals; at least one sub-liquid cooling flow channel is arranged around the outer side of the pressure relief and smoke exhaust flow channel; a plurality of the sub-liquid cooling flow channels are connected in sequence; a main flow channel is also arranged on one side of the pressure relief and smoke exhaust flow channel, and a plurality of the sub-liquid cooling flow channels are connected with the main flow channel through branch flow channels to form a cooling channel; a water inlet and outlet connected to the cooling channel are arranged on the body of the liquid cooling plate.

2. The integrated liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate body comprises a liquid cooling channel plate and a liquid cooling flat plate fixedly connected to the liquid cooling channel plate; the pressure relief and smoke exhaust channel, the sub-liquid cooling channel, the branch channel and the main channel are all integrated on the liquid cooling channel plate.

3. The integrated liquid cooling plate according to claim 2, characterized in that: The liquid cooling plate is provided with a plurality of pressure relief areas corresponding to the pressure relief and smoke exhaust flow channels one by one; and the pressure relief area is provided with at least one first through hole connected to the pressure relief and smoke exhaust flow channels.

4. The integrated liquid cooling plate according to claim 2 or 3, characterized in that: The inner bottom surface of the pressure relief and smoke exhaust flow channel is provided with a plurality of second through holes along its length direction; the bottom surface of the liquid cooling plate is provided with a plurality of fusible sheets corresponding to the pressure relief and smoke exhaust flow channels one by one; the fusible sheets are used to cover all the second through holes corresponding to the pressure relief and smoke exhaust flow channels.

5. The integrated liquid cooling plate according to claim 4, characterized in that: The larger the cross-section of the pressure relief and smoke exhaust flow channel is, the greater the evacuation capacity of the pressure relief and smoke exhaust flow channel is.

6. A high-efficiency pressure relief battery pack, characterized in that: It comprises a battery protection box body, in which a battery module is arranged, and an integrated liquid cooling plate as described in any one of claims 1 to 5; the integrated liquid cooling plate is arranged on one side of the battery module; the cooling channel on the integrated liquid cooling plate is used to cool the battery module; the pressure relief and smoke exhaust flow channel on the integrated liquid cooling plate is used to accelerate the discharge of internal pressure of the battery module.

7. The high-efficiency pressure-release battery pack according to claim 6, characterized in that: A plurality of gaskets corresponding one-to-one to the pressure relief and smoke exhaust channels are further provided between the integrated liquid cooling plate and the battery module; the gasket is provided with at least one third through hole connected to the pressure relief and smoke exhaust channel; the pressure relief port on the battery module is connected to the pressure relief and smoke exhaust channel through the third through hole.

8. The high-efficiency pressure-release battery pack according to claim 6 or 7, characterized in that: The battery protection box body includes an upper cover, a mounting frame and a bottom plate; the upper cover, the mounting frame and the bottom plate are combined to form a accommodating cavity; the battery module and the integrated liquid cooling plate are installed in the accommodating cavity in sequence from top to bottom; the bottom plate is recessed downward corresponding to the middle of the integrated liquid cooling plate, so that a pressure relief buffer space is formed between the bottom plate and the integrated liquid cooling plate.

9. The high-efficiency pressure-release battery pack according to claim 8, characterized in that: The volume of the pressure relief buffer space is greater than the total volume of the spaces of all the pressure relief and smoke exhaust channels.

10. The high-efficiency pressure-release battery pack according to claim 8, characterized in that: The installation frame includes a pressure relief pipe arranged at one end of the pressure relief and smoke exhaust channel; at least one pressure relief channel is arranged in the pressure relief pipe; a fourth through hole connecting the pressure relief channel and the pressure relief and smoke exhaust channel is arranged at the bottom of the pressure relief pipe; when there are multiple pressure relief channels, two adjacent pressure relief channels are connected by a vent hole; the outer surface of the pressure relief pipe is provided with a fifth through hole connected to the pressure relief channel, and an explosion-proof valve installed on the fifth through hole.

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