Battery system

Abstract

The battery system comprises a box body and a battery assembly, the box body comprises an outer frame and a bottom plate which are connected with each other, a mounting cavity is defined by the outer frame and the bottom plate, a connecting port and a pressure relief cavity are formed in the bottom plate, the connecting port is communicated with the pressure relief cavity, the battery assembly comprises a shell, a battery cell, a runner plate and a covering piece, and the shell is assembled in the mounting cavity; the shell is provided with a containing cavity and an opening communicated with the containing cavity, the battery cell is arranged in the containing cavity and connected with the shell, the pressure relief end of the battery cell faces the opening, the runner plate is arranged between the shell and the bottom plate, the runner plate is provided with a pressure relief opening, the pressure relief opening is communicated with the connecting port and the opening, and the covering piece and the runner plate are connected with and seal the pressure relief opening. The method aims at achieving effective dredging of thermal runaway substances and remarkably reducing the risk of heat spreading.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery system. Background Technology

[0002] With the rapid development of the new energy industry, battery systems have been widely used in electric vehicles, energy storage systems, and consumer electronics. However, battery safety issues are particularly prominent in high-energy-density applications. Under extreme conditions such as overcharging, short circuits, and high temperatures, batteries may experience thermal runaway, leading to safety accidents.

[0003] Thermal runaway refers to a series of uncontrollable reactions that occur inside a battery cell when heat accumulates beyond its heat dissipation capacity. These reactions include electrolyte decomposition, thermal decomposition of positive and negative electrode materials, and the release of large amounts of gas and heat. The high temperatures and combustible materials generated by thermal runaway can spread within the battery pack, triggering heat propagation and causing a chain reaction in multiple cells, thus exacerbating the severity of the accident.

[0004] Currently, most existing battery thermal safety designs rely on fireproof partitions, thermal management systems, and external protective casings. However, when thermal runaway occurs in a battery cell, the resulting high temperatures, gases, and particulate matter are often trapped inside the battery pack and cannot be effectively guided or dispersed. This not only increases the internal pressure of the battery pack but may also accelerate the thermal runaway process of surrounding cells through localized high temperatures, ultimately leading to thermal propagation or even an explosion.

[0005] Therefore, it is crucial to effectively manage and channel thermal runaway products and reduce the risk of thermal runaway propagation. Utility Model Content

[0006] One objective of this invention is to provide a battery system that addresses the technical problem of the inability to effectively manage and treat thermal runaway products in battery systems.

[0007] To achieve the above objectives, the present invention provides a solution as follows: a battery system comprising a housing, including an outer frame and a bottom plate connected to each other, the outer frame and the bottom plate forming an installation cavity, the bottom plate having a connection port and a pressure relief cavity, the connection port communicating with the pressure relief cavity; a battery assembly comprising a housing, a battery cell, a flow channel plate and a cover plate, the housing being assembled in the installation cavity, the housing having a receiving cavity and an opening communicating with the receiving cavity, the battery cell being disposed in the receiving cavity and connected to the housing, the pressure relief end of the battery cell facing the opening, the flow channel plate being disposed between the housing and the bottom plate, the flow channel plate having a pressure relief port, the pressure relief port communicating with the connection port and the opening respectively, and the cover plate and the flow channel plate being connected to seal the pressure relief port.

[0008] Optionally, the pressure relief end of the battery cell is directly opposite and coaxially arranged with the pressure relief port, and the pressure relief end of the battery cell is covered to seal the pressure relief port.

[0009] Optionally, the thickness of the cover sheet is R mm, where 0.8 ≤ R < 1, and the cover sheet is provided with grooves.

[0010] Optionally, the cover plate and the flow channel plate are integrally molded structures.

[0011] Optionally, the battery assembly also includes a mica sheet disposed within the pressure relief port and connected to the side of the cover sheet opposite to the battery cell.

[0012] Optionally, the base plate includes an upper base plate and a lower base plate that are respectively connected to the outer frame. The pressure relief chamber is located between the upper base plate and the lower base plate. The connection port is located on the upper base plate. A pressure relief channel is provided at the end of the upper base plate that is connected to the outer frame. The pressure relief channel communicates with the pressure relief chamber. The outer frame has a discharge port that communicates with the pressure relief channel.

[0013] Optionally, the housing also includes a blocking block disposed at one end of the pressure relief channel opposite to the discharge port.

[0014] Optionally, the enclosure also includes an explosion relief valve, which is connected to the outer frame and has a discharge port.

[0015] Optionally, the battery assembly also includes an immersion fluid that fills the containment cavity; the flow channel plate has multiple flow channels, and the pressure relief port is located between the flow channels.

[0016] Optionally, the flow channel is arranged in a wavy shape along the length of the flow channel plate.

[0017] Optionally, the housing also includes a sealing strip, which is disposed between the flow channel plate and the bottom plate.

[0018] The beneficial effects of this utility model are as follows:

[0019] Compared to existing technologies, this application introduces a thermal runaway material venting system into the battery system. An opening, a pressure relief port, and a connection port together form a continuous venting channel, and an independent pressure relief chamber is set within the base plate. When thermal runaway occurs in the cell, the high-temperature gas, particulate matter, and other reaction products released from the battery's pressure relief end first act on the cover sheet. The high temperature causes the cover sheet to melt, thus opening the venting channel and allowing the substances to flow into the pressure relief chamber in the base plate. The pressure relief chamber effectively isolates the thermal runaway products from contact with other parts of the battery assembly, preventing the diffusion of high-temperature gas and particulate matter within the cavity, thereby reducing the risk of thermal propagation due to a chain reaction. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is an exploded view of the battery system provided in an embodiment of the present invention;

[0022] Figure 2 This is an exploded view of the battery assembly provided in an embodiment of the present invention;

[0023] Figure 3 This is a top view of the internal structure of the battery system provided in this embodiment of the utility model;

[0024] Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A cross-sectional view along the AA direction;

[0025] Figure 5 This is provided by the embodiment of the present utility model. Figure 4 A magnified view of a portion of region A in the middle;

[0026] Figure 6 This is a schematic diagram of the material flow direction within the pressure relief channel provided in this embodiment of the utility model.

[0027] Explanation of icon numbers:

[0028] 10. Housing; 11. Outer frame; 111. Drain port; 12. Base plate; 121. Upper base plate; 1211. Connecting port; 1212. Pressure relief channel; 122. Lower base plate; 13. Mounting cavity; 14. Pressure relief cavity; 15. Opening; 16. Block; 17. Pressure relief valve; 18. Sealing strip; 19. Cover plate; 20. Battery assembly; 21. Housing; 211. Receiving cavity; 22. Battery cell; 23. Flow channel plate; 231. Pressure relief port; 232. Flow channel; 24. Cover plate; 25. Mica sheet; 26. Sealing layer; 27. Immersion liquid. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1 and Figure 2 , Figure 1 This is an exploded view of the battery system provided in an embodiment of the present invention. Figure 2 This is an exploded view of the battery assembly 20 provided in this embodiment of the present invention.

[0031] This utility model provides a battery system designed to effectively channel thermal runaway substances and significantly reduce the risk of thermal propagation. The battery system includes a housing 10 and a battery assembly 20. The housing 10 includes an outer frame 11 and a base plate 12, which are interconnected to form a mounting cavity 13 for accommodating the battery assembly 20. The mounting cavity 13 is sealed by a cover plate 19. The base plate 12 has a connection port and a pressure relief cavity 14, with the connection port communicating with the pressure relief cavity 14. The pressure relief cavity 14 serves as an evacuation space for thermal runaway substances, ensuring the system has good safety mitigation capabilities in the event of an anomaly.

[0032] The battery assembly 20 includes a housing 21, a battery cell 22, a flow channel plate 23, and a cover plate 24. The housing 21 has a receiving cavity 211 for fixing the battery cell 22, and an opening 15 communicating with the receiving cavity 211. The pressure relief end of the battery cell 22 faces the opening 15 to release abnormal substances. A flow channel plate 23 is disposed between the housing 21 and the base plate 12. The flow channel plate 23 is connected to the housing 21 by a sealant layer 26. The flow channel plate 23 has a pressure relief port 231, which communicates with both the opening 15 of the housing 21 and the connection port of the base plate 12, forming a complete drainage channel. Furthermore, the cover plate 24 seals the pressure relief port 231 of the flow channel plate 23, ensuring system tightness under normal operating conditions, and only activating the pressure relief function through melting in the event of thermal runaway.

[0033] In this embodiment, please refer to Figure 3 and Figure 4 , Figure 3 This is a top view of the internal structure of the battery system provided in this embodiment of the present invention. Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A cross-sectional view along the AA direction. Opening 15, pressure relief port 231, and connection port form a drainage channel leading to pressure relief chamber 14. The cooperation between the drainage channel and pressure relief chamber 14 allows for the rapid and safe discharge of thermal runaway products, effectively preventing thermal propagation. Simultaneously, the sealing of the cover plate 24 ensures the airtightness of the system and its reliability during normal operation, further improving the safety and stability of the battery system.

[0034] Specifically, when thermal runaway occurs in cell 22, the high-temperature gas released from its pressure relief end first melts the cover sheet 24, opening up the drainage channel. Subsequently, the thermal runaway products rapidly flow along the drainage channel into the pressure relief chamber 14 of the base plate 12. As an independent enclosed space, the pressure relief chamber 14 effectively isolates the high-temperature gas and particulate matter, preventing their diffusion within the containment chamber 211, thereby blocking the path of thermal runaway propagation to other cells 22.

[0035] Further, please refer to Figure 5 , Figure 5 This is provided by the embodiment of the present utility model. Figure 4 A magnified view of a portion of region A. To ensure the straightness and unobstructedness of the pressure relief path, the pressure relief end of cell 22 is directly opposite and coaxially positioned with the pressure relief port 231 on the flow channel plate 23. Simultaneously, the pressure relief end of cell 22 seals the pressure relief port 231, forming a tight structural connection, further improving the sealing performance of the pressure relief port 231 and effectively preventing impurities or moisture from the external environment from entering the interior of cell 22.

[0036] In this embodiment, the coaxial arrangement of the pressure relief end of the battery cell 22 and the pressure relief port 231 not only helps optimize the spatial layout of the pressure relief structure but also enables efficient pressure relief in the event of thermal runaway in the battery cell 22. During thermal runaway, the high-temperature gas, particulate matter, and liquid substances released from the pressure relief end of the battery cell 22 act directly on the pressure relief port 231 along the coaxial path and quickly penetrate the drainage channel through the melted cover plate 24. This design reduces the flow resistance of high-temperature products in the pressure relief channel 1212, preventing material retention and pressure accumulation, thereby significantly improving the system's pressure relief efficiency. Simultaneously, the cover seal ensures the sealing of the pressure relief port 231 during normal system operation, contributing to the long-term stable operation of the system.

[0037] Furthermore, to improve the stability of thermal runaway material transport, the thickness R mm of the cover plate 24 is limited to a specific range, namely 0.8 ≤ R < 1. Within this thickness range, the cover plate 24 has sufficient strength to maintain the sealing and reliability of the system during normal operation, and can also respond quickly in the event of thermal runaway. Simultaneously, the cover plate 24 is also provided with grooves, which further optimize its melting performance after heating, making the melting location and process more controllable and ensuring that the transport channel can be opened in a timely manner.

[0038] In this embodiment, the combination of thickness limitation and scoring on the cover sheet 24 improves the stability and responsiveness of the battery system. Specifically, when thermal runaway occurs in the cell 22, the high-temperature material released from its pressure relief end rapidly acts on the cover sheet 24. Thanks to the moderate thickness design, the cover sheet 24 can quickly reach its melting point, while the scoring guides the cover sheet 24 to preferentially melt at specific locations under the action of high temperature and internal pressure. This not only shortens the pressure relief response time but also ensures the unobstructed drainage channels after melting, avoiding the risk of blockage caused by residue of the cover sheet 24.

[0039] Furthermore, the groove layout of the cover sheet 24 can be adjusted according to the shape of the drainage channels and the flow requirements of the pressure relief material. This makes the cover sheet 24 more adaptable and applicable to battery systems of different sizes and specifications.

[0040] In some embodiments, the cover plate 24 and the flow channel plate 23 are designed as an integrally molded structure, that is, the cover plate 24 and the flow channel plate 23 are manufactured as a single component through an integrated process. This not only simplifies the manufacturing process but also improves the overall integrity and sealing performance of the structure, effectively reducing the system assembly complexity and production costs.

[0041] In this embodiment, the one-piece molded cover plate 24 and flow channel plate 23 achieve higher sealing reliability, avoiding connection gaps or poor sealing problems that may occur in traditional assembly processes. When the battery system is operating normally, the one-piece molded structure ensures the complete sealing of the pressure relief port 231, while reducing the number of connection points, thereby improving the mechanical strength and vibration resistance of the component. In addition, the integrated design makes the fit between the cover plate 24 and the flow channel plate 23 more precise, and the control of the melting process is more stable, which helps to ensure the timely opening of the drainage channel in the event of thermal runaway.

[0042] In some embodiments, the battery assembly 20 further includes a mica sheet 25, which is installed in the pressure relief port 231 and located on the back of the cover sheet 24. The mica sheet 25 is connected to the side of the cover sheet 24 away from the cell 22, further optimizing the thermal runaway safety protection mechanism of the battery system and adding a reliable barrier to the drainage channel.

[0043] In this embodiment, the mica sheet 25, as a high-temperature resistant material, can maintain stability and physical integrity under extreme temperatures and is not easily decomposed or damaged. The mica sheet 25 effectively prevents the high-temperature gas, particulate matter, and molten material ejected during thermal runaway from flowing back into the system. That is, it prevents the ejected material from flowing backward through the pressure relief port 231 towards the cover sheet 24, greatly reducing the possibility of high-temperature material re-entering the battery cell 22 or the housing 21, thereby effectively avoiding the secondary effects of thermal runaway material and reducing the risk of thermal propagation.

[0044] Furthermore, the base plate 12 is designed as a double-layer structure, including an upper base plate 121 and a lower base plate 122 connected to the outer frame 11. The pressure relief chamber 14 is located between the upper base plate 121 and the lower base plate 122, forming an independent isolated space to contain the high-temperature gas and particulate matter generated by the thermal runaway of the battery cell 22. A connection port is provided on the upper base plate 121 to communicate with the pressure relief port 231 of the flow channel plate 23, thereby enabling the flow of material from the battery cell 22 to the pressure relief chamber 14. In addition, a pressure relief channel 1212 is provided at the end of the upper base plate 121 connected to the outer frame 11, and a discharge port 111 is also provided on the outer frame 11, which is connected to the pressure relief channel 1212, for ultimately discharging the material in the pressure relief chamber 14 to the outside of the battery system.

[0045] In this embodiment, the thermal runaway material flows along a predetermined path after release. First, the high-temperature material enters the pressure relief chamber 14 through the pressure relief end of cell 22 and the flow channel plate 23. Subsequently, the material in the pressure relief chamber 14 is guided to the pressure relief channel 1212 and discharged to the outside of the battery system for centralized treatment through the discharge port 111 of the outer frame 11. This multi-stage drainage not only effectively reduces the internal pressure of the battery and prevents the accumulation of thermal runaway material inside the battery, but also avoids the direct impact of high-temperature gas on other cells 22, thereby significantly reducing the risk of heat spread. In addition, the double-layer bottom plate 12 structure provides additional heat insulation and buffering functions, helping to protect other components of the battery system from high temperatures.

[0046] Further, please refer to Figure 6 , Figure 6 This is a schematic diagram of the material flow direction within the pressure relief channel 1212 provided in this embodiment of the invention. The housing 10 also includes a blocking block 16, which is installed within the pressure relief channel 1212 at one end opposite to the discharge port 111. The blocking block 16 is designed to optimize the material flow path within the pressure relief channel 1212, thereby improving the efficiency of dissipating thermal runaway materials. The shape and size of the blocking block 16 can be adjusted according to the geometric characteristics of the pressure relief channel 1212 to ensure a tight fit with the inner wall of the channel, while reserving sufficient space in the flow area to avoid generating additional resistance.

[0047] In this embodiment, the block 16 can effectively guide the thermal runaway material to flow unidirectionally along the pressure relief channel 1212 toward the discharge port 111, avoiding the phenomenon of the pressure relief material obstructing each other in the channel due to the disordered flow direction, thereby maintaining the flow order in the channel and further improving the pressure relief efficiency of the system.

[0048] Furthermore, the plug 16 also serves to stabilize the pressure distribution within the pressure relief channel 1212. By guiding the flow of thermally runaway substances, the plug 16 can reduce local high-pressure areas within the channel and prevent structural stress concentration caused by uneven pressure.

[0049] In some embodiments, the housing 10 further includes a pressure relief valve, which is mounted on the outer frame 11 and covers the discharge port 111. The pressure relief valve can control the opening and closing of the discharge port 111 and can automatically open according to a rapid increase in pressure, providing a safe and efficient discharge path for thermal runaway substances.

[0050] In this embodiment, the pressure relief valve can dynamically respond to pressure relief. When the battery system is in normal condition, the pressure relief valve keeps the discharge port 111 closed to prevent external environmental interference with internal components. However, once thermal runaway occurs, the high-temperature gas and particulate matter in the pressure relief chamber 14 reach the discharge port 111 through the pressure relief channel 1212. At this time, due to the rapid increase in pressure, the pressure relief valve can automatically open at the set critical pressure, allowing the high-pressure material to be quickly discharged to the outside of the system, preventing pressure accumulation from damaging the housing 10.

[0051] Meanwhile, the relief valve is also adjustable, allowing the opening pressure and discharge rate to be set according to the specific needs of the battery system, ensuring that it can respond quickly and discharge efficiently under different operating conditions.

[0052] In some embodiments, the battery assembly 20 further includes an immersion fluid 27, which fills the receiving cavity 211 of the housing 21, completely covering the battery cell 22 to provide efficient cooling. Meanwhile, the flow channel plate 23 has multiple flow channels 232 to guide the flow of the immersion fluid 27 and form effective heat exchange channels between different areas. A pressure relief port 231 is located between the flow channels 232 to ensure that thermal runaway substances can quickly enter the pressure relief chamber 14 under the coverage of the immersion fluid 27.

[0053] In this embodiment, the battery assembly 20 adopts an immersion cooling structure, with the battery cells 22 completely immersed in the immersion fluid 27. This provides efficient cooling during both normal operation and thermal runaway. When a battery cell 22 experiences thermal runaway, the immersion fluid 27 rapidly absorbs and disperses the high-temperature heat surrounding the cell 22, effectively reducing its temperature. This rapid cooling mechanism prevents the energy from thermal runaway from spreading to the surrounding area, thereby avoiding adjacent battery cells 22 from reaching the thermal runaway trigger temperature due to overheating.

[0054] Meanwhile, the flow channel plate 23 further optimizes the circulation path of the immersion fluid 27. As the immersion fluid 27 flows between the flow channels 232, it not only carries away heat but also creates a uniform temperature distribution throughout the entire containment cavity 211 through convection, thereby improving cooling efficiency. The location of the pressure relief port 231 ensures that thermally runaway substances remain enclosed by the immersion fluid 27 during release, effectively buffering their high-temperature characteristics and reducing their impact on the pressure relief channel 1212, thus protecting other structures in the system.

[0055] Furthermore, in order to improve the heat exchange efficiency of the fluid in the flow channel 232, the flow channel 232 is arranged in a wave shape along the length of the flow channel plate 23. Through the wave-shaped layout, the flow channel plate 23 can extend the flow path of the immersion liquid 27 in a limited space, thereby increasing the contact area for heat transfer and providing more sufficient heat dissipation capacity for cooling the battery cell 22.

[0056] In this embodiment, when the immersion liquid 27 flows in the flow channel 232, the wavy path can generate a moderate disturbance effect during the fluid flow process, break the laminar flow state, thereby enhancing the convective heat transfer capacity of the fluid, dispersing the heat generated on the surface of the battery cell 22 more evenly, effectively avoiding the formation of local hot spots, and greatly improving the cooling effect.

[0057] In some embodiments, the housing 10 further includes a sealing strip 18 disposed between the flow channel plate 23 and the bottom plate 12. The sealing strip 18 is made of an elastic material and is able to form a tight seal on the contact surface between the two, thereby preventing high-temperature gas, liquid or particulate matter from leaking from the gaps around the pressure relief channel 1212 during the pressure relief process.

[0058] In this embodiment, the sealing strip 18 provides a highly efficient sealing effect, ensuring that the pressure relief channel 1212 is completely isolated during normal operation, preventing the immersion liquid 27 or external impurities from entering the pressure relief chamber 14, and also preventing the leakage of substances during the pressure relief process from causing contamination or damage to other system components. On the other hand, the elastic properties of the sealing strip 18 also play a role in shock absorption and buffering, effectively absorbing the impact force generated during mechanical vibration and thermal runaway, further protecting the relevant structures from damage.

[0059] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0060] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0061] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0062] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery system, characterized in that, include: The housing includes an outer frame and a bottom plate that are connected to each other. The outer frame and the bottom plate enclose a mounting cavity. The bottom plate has a connection port and a pressure relief cavity. The connection port communicates with the pressure relief cavity. A battery assembly includes a housing, a battery cell, a flow channel plate, and a cover sheet. The housing is assembled in the mounting cavity and has a receiving cavity and an opening communicating with the receiving cavity. The battery cell is disposed in the receiving cavity and connected to the housing, with the pressure relief end of the battery cell facing the opening. The flow channel plate is disposed between the housing and the base plate and has a pressure relief port that communicates with the connection port and the opening. The cover sheet and the flow channel plate are connected to seal the pressure relief port.

2. The battery system according to claim 1, characterized in that, The pressure relief end of the battery cell is directly opposite to and coaxially arranged with the pressure relief port, and the pressure relief end of the battery cell covers the pressure relief port.

3. The battery system according to claim 1, characterized in that, The thickness of the cover sheet is R mm, where 0.8 ≤ R < 1, and the cover sheet is provided with grooves.

4. A battery system according to claim 3, characterized in that, The cover plate and the flow channel plate are integrally formed.

5. A battery system according to claim 1, characterized in that, The battery assembly also includes a mica sheet disposed inside the pressure relief port and connected to the side of the cover sheet opposite to the battery cell.

6. A battery system according to any one of claims 1 to 5, characterized in that, The base plate includes an upper base plate and a lower base plate that are respectively connected to the outer frame. The pressure relief chamber is located between the upper base plate and the lower base plate. The connection port is located on the upper base plate. A pressure relief channel is provided at the end of the upper base plate that is connected to the outer frame. The pressure relief channel is connected to the pressure relief chamber. The outer frame is provided with a discharge port that is connected to the pressure relief channel.

7. A battery system according to claim 6, characterized in that, The housing also includes a blocking block, which is disposed at one end of the pressure relief channel opposite to the discharge port.

8. A battery system according to claim 6, characterized in that, The enclosure also includes an explosion relief valve, which is connected to the outer frame and covers the discharge port.

9. A battery system according to claim 1, characterized in that, The battery assembly also includes an immersion liquid that fills the receiving cavity; the flow channel plate has multiple flow channels, and the pressure relief port is located between the flow channels.

10. A battery system according to claim 9, characterized in that, The flow channel is arranged in a wavy shape along the length of the flow channel plate.

11. A battery system according to any one of claims 1 to 5, characterized in that, The housing also includes a sealing strip, which is disposed between the flow channel plate and the bottom plate.

Images