Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of power batteries, the battery pack comprises a box body, a plurality of battery modules, a plurality of anti-explosion valves and an exhaust protective cover, the box body comprises an upper cover and a first bottom plate, the upper cover covers the first bottom plate and is connected with the first bottom plate, and a containing cavity is formed between the upper cover and the first bottom plate; the plurality of battery modules are arranged in the accommodating cavity and are connected with the first bottom plate; the plurality of anti-explosion valves are arranged on one side, facing the upper cover, of the battery module and are connected with the battery module; the exhaust protective cover is arranged on the side, facing the upper cover, of the battery module and covers the explosion-proof valves, a plurality of through holes are formed in the exhaust protective cover, and each through hole is formed in the periphery of the corresponding explosion-proof valve in a surrounding mode. The utility model aims to solve the technical problems that the existing PACK-level fire-fighting scheme is high in cost and poor in thermal runaway cooling and thermal diffusion inhibition performance of the battery cell.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power batteries, and particularly relates to a battery pack and an electric equipment. BACKGROUND

[0002] The existing scheme is not designed for thermal-electric separation, and high voltage exists near the middle of the two rows of battery cells. When thermal runaway occurs, short circuit and arc drawing are more likely to occur, and even there is a risk of fire. According to the requirements or suggestions of energy storage safety standards, PACK (battery pack) fire protection is required, so the existing energy storage battery pack adopts perfluorohexone into the box for PACK-level fire extinguishing and fire protection, but has almost no effect on battery cell thermal runaway cooling and thermal diffusion inhibition. That is, the existing PACK-level fire protection scheme has high cost and poor performance in battery cell thermal runaway cooling and thermal diffusion inhibition. CONTENT OF THE UTILITY MODEL

[0003] The application embodiment provides a battery pack, which aims to overcome the technical problem of the existing PACK-level fire protection scheme with high cost and poor performance in battery cell thermal runaway cooling and thermal diffusion inhibition. Another object of the application embodiment is to provide an electric equipment.

[0004] The application embodiment provides a battery pack, which comprises:

[0005] A box body comprising an upper cover and a first bottom plate, the upper cover being arranged on the first bottom plate and connected with the first bottom plate, and a containing cavity being formed between the upper cover and the first bottom plate;

[0006] A plurality of battery modules arranged in the containing cavity and connected with the first bottom plate;

[0007] A plurality of explosion-proof valves arranged on a side of the battery modules facing the upper cover;

[0008] An exhaust protection cover arranged on the side of the battery modules facing the upper cover and covering the plurality of explosion-proof valves, the exhaust protection cover being provided with a plurality of through holes, and each through hole being arranged around an outer periphery of one explosion-proof valve.

[0009] In some embodiments, the battery module has a first direction and a second direction intersecting with each other, and the battery module comprises:

[0010] A plurality of first single batteries, the plurality of first single batteries being arranged at intervals along the first direction;

[0011] A plurality of second single batteries, the plurality of second single batteries being arranged at intervals along the first direction, and the second single batteries being arranged along the second direction with the first single batteries;

[0012] The pole of the first single battery is connected with the pole of the second single battery; each of the first single battery and the second single battery is provided with the explosion-proof valve on the side facing the upper cover.

[0013] In some embodiments, the exhaust protection cover comprises:

[0014] A second bottom plate abuts the side of the plurality of battery modules facing the upper cover, and the through hole is formed in the second bottom plate;

[0015] A first cover body covers the side of the second bottom plate facing the upper cover and is connected with the second bottom plate;

[0016] A first channel is formed between the first cover body and the second bottom plate, one end of the first channel is a first sealing end, and the other end is a first opening end.

[0017] In some embodiments, the exhaust protection cover has a liquid inlet hole, the liquid inlet hole is formed on the side of the second bottom plate close to the first sealing end;

[0018] The battery pack further comprises:

[0019] A connecting pipe is connected with the liquid inlet hole at one end and in communication;

[0020] A liquid inlet pipe is connected with the other end of the connecting pipe at one end and in communication, and the other end of the liquid inlet pipe is externally connected with fire-fighting liquid.

[0021] In some embodiments, the upper cover is provided with a peripheral device on one side wall in the second direction;

[0022] The first sealing end is arranged close to the peripheral device, and the first opening end is arranged away from the peripheral device.

[0023] In some embodiments, the battery pack further comprises a first liquid cooling plate, the first liquid cooling plate covers the side of the battery module facing the upper cover and abuts the battery module, and the exhaust protection cover is integrated on the first liquid cooling plate.

[0024] In some embodiments, the exhaust protection cover comprises a second cover body, the second cover body covers the first liquid cooling plate and is connected with the first liquid cooling plate;

[0025] A second channel is formed between the second cover body and the first liquid cooling plate, one end of the second channel is a second sealing end, and the other end is a second opening end; the through hole is formed in the first liquid cooling plate and in communication with the second channel.

[0026] In some embodiments, the first liquid cooling plate comprises:

[0027] a third bottom plate covering a side of the battery module facing the upper cover and abutting against the battery module;

[0028] a third cover body arranged on a side of the third bottom plate facing the upper cover and connected with the third bottom plate;

[0029] wherein a plurality of flow channels are formed between the third cover body and the third bottom plate, and the flow channels are in communication with the second channel.

[0030] In some embodiments, the first liquid cooling plate and the exhaust protection cover having the second channel are a stamping integrated structure.

[0031] The embodiments of the present application also disclose a power consumption device comprising the battery pack as described in the above embodiments.

[0032] The embodiments of the present application have one of the following beneficial effects:

[0033] The battery pack and the power consumption device of the embodiments of the present application belong to the technical field of power batteries, and the battery pack comprises a box body, a plurality of battery modules, a plurality of explosion-proof valves and an exhaust protection cover, wherein the box body comprises an upper cover and a first bottom plate, the upper cover is arranged on the first bottom plate and connected with the first bottom plate, and a containing cavity is formed between the upper cover and the first bottom plate; the plurality of battery modules are arranged in the containing cavity and connected with the first bottom plate; the plurality of explosion-proof valves are arranged on a side of the battery module facing the upper cover and connected with the battery module; the exhaust protection cover is arranged on a side of the battery module facing the upper cover and covers the plurality of explosion-proof valves, the exhaust protection cover is provided with a plurality of through holes, and each through hole is arranged around an outer periphery of one explosion-proof valve. The present application aims to overcome the technical problems of high cost of the existing PACK level fire extinguishing scheme and poor heat runaway cooling and heat diffusion inhibition performance of the battery cell.

[0034] The power consumption device of the embodiments of the present application comprises the battery pack as described in the above embodiments. Therefore, all the technical features and technical effects of the single battery can be achieved, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0036] Figure 1 An overall structure explosion diagram of a battery pack provided by the embodiments of the present application;

[0037] Figure 2 An overall structure schematic diagram of a battery module provided by the embodiments of the present application;

[0038] Figure 3 An overall structural schematic diagram of the exhaust protection cover from another angle is provided for the embodiment of the present application;

[0039] Figure 4 An overall structural schematic diagram of the exhaust protection cover from another angle is provided for the embodiment of the present application;

[0040] Figure 5 A schematic diagram of a liquid inlet mode of the exhaust protection cover is provided for the embodiment of the present application;

[0041] Figure 6 An overall structural exploded view of another battery pack is provided for the embodiment of the present application;

[0042] Figure 7 A schematic diagram of the positional relationship between the first liquid cooling plate and the battery module is provided for the embodiment of the present application;

[0043] Figure 8 A sectional structural view of the first liquid cooling plate is provided for the embodiment of the present application;

[0044] Figure 9 A schematic diagram of the first liquid cooling plate is provided for the embodiment of the present application; Figure 8 A local enlarged view of A in the above figure is provided for the embodiment of the present application;

[0045] Figure 10 A structural schematic diagram of the first liquid cooling plate from one angle is provided for the embodiment of the present application;

[0046] Figure 11 A structural schematic diagram of the first liquid cooling plate from another angle is provided for the embodiment of the present application.

[0047] Explanation of reference signs:

[0048] X-first direction; Y-second direction;

[0049] 10-box body; 11-upper cover; 12-first bottom plate; 13-containing cavity; 14-first cross beam; 15-second cross beam; 16-third cross beam;

[0050] 20-battery module; 21-first single battery; 22-second single battery; 23-pole;

[0051] 30-explosion-proof valve;

[0052] 40-exhaust protection cover; 41-second bottom plate; 42-first cover body; 43-first channel; 44-first sealing end; 45-first opening end; 46-liquid inlet hole; 47-second cover body; 48-through hole;

[0053] 50-connection pipe;

[0054] 60 - inlet tube;

[0055] 70 - first liquid cooling plate; 71 - second passage; 72 - second sealed end; 73 - second open end; 74 - third bottom plate; 75 - third cover; 76 - flow channel;

[0056] 80 - peripheral device. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0058] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In the description of the present application, "a plurality of" means two or more, unless otherwise specified. The "and / or" describes the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. In addition, the terms "include" and "have" 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 does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product or device.

[0059] Those skilled in the art can understand that the drawings are only schematic diagrams of example embodiments and can not be to scale. The modules or flows in the drawings are not necessarily essential for implementing the present application, and therefore cannot be used to limit the scope of protection of the present application.

[0060] As a prologue of the embodiments of the present application, the prior art has the following deficiencies. In the prior art, the non-thermal electric separation design has the following deficiencies. In this design, there is high voltage between the two rows of battery cells near the middle, which is prone to cause short circuit arc and even fire risk when the battery cells are in thermal runaway. According to the requirements or recommendations of the energy storage safety standard, the battery pack (PACK) needs to have fire extinguishing measures. Therefore, the current energy storage battery pack usually uses perfluorohexone for in-box fire extinguishing. However, this PACK level fire extinguishing scheme has little effect on reducing the temperature of battery cell thermal runaway and inhibiting thermal diffusion. In short, the existing PACK level fire extinguishing scheme not only has high cost, but also has poor performance in reducing the temperature of battery cell thermal runaway and inhibiting thermal diffusion.

[0061] Therefore, the embodiments of the present application provide a battery pack to at least partially solve the above technical problems.

[0062] The embodiments of the present application provide a battery pack, please refer to Figure 1 、 Figure 2 、 Figure 3 , Figure 1 The overall structure of the battery pack provided by the embodiments of the present application is shown in the following figure, Figure 2 The overall structure of the battery module provided by the embodiments of the present application is shown in the following figure, Figure 3 The overall structure of the exhaust protection cover from one angle is shown in the following figure. The battery pack includes a box body 10, a plurality of battery modules 20, a plurality of explosion-proof valves 30 and an exhaust protection cover 40. The box body 10 includes an upper cover 11 and a first bottom plate 12. The upper cover 11 is arranged on the first bottom plate 12 and connected with the first bottom plate 12. The upper cover 11 and the first bottom plate 12 form a containing cavity 13. The plurality of battery modules 20 are arranged in the containing cavity 13 and connected with the first bottom plate 12. The plurality of explosion-proof valves 30 are arranged on the side of the battery module 20 facing the upper cover 11. The exhaust protection cover 40 is arranged on the side of the battery module 20 facing the upper cover 11 and covers the plurality of explosion-proof valves 30. The exhaust protection cover 40 is provided with a plurality of through holes 48. Each through hole 48 is arranged around the outer periphery of one explosion-proof valve 30.

[0063] It should be noted that the connection of the upper cover 11 and the bottom plate 12 not only provides strong structural support, but also ensures the stability of the battery module 20, preventing it from shifting or loosening during use. The battery module 20 is fixed in the accommodation cavity 13 and connected with the first bottom plate 12, which ensures the fixation of the battery and the reliability of the electrical connection, reducing the risk of short circuit caused by external impact or vibration. In case of excessive internal pressure or thermal runaway in the battery, the explosion-proof valve 30 can quickly release the pressure to prevent the battery pack from exploding or other serious accidents. The exhaust protection cover 40 covers the explosion-proof valve 30, further enhancing safety. The exhaust protection cover 40 not only protects the explosion-proof valve 30 from external damage, but also ensures smooth exhaust during pressure release through the design of multiple through holes 48. Each through hole 48 surrounds the outer periphery of an explosion-proof valve 30, controlling the airflow direction and preventing high-temperature gas from affecting other components. This design effectively improves the overall safety performance of the battery pack.

[0064] It should be noted that in the design of the battery pack, as shown in Figure 1 The first cross beam 14 is located at the front end of the battery pack and is mainly used to provide structural support at the front. It is usually made of high-strength alloy materials to ensure durability and strength in the event of a collision, and the design may include reinforcing ribs or other structural features to improve its bending and torsional resistance. The second cross beam 15 is located in the middle of the battery pack and serves to connect and support the battery module 20. The second cross beam 15 is usually made of lightweight but strong materials such as aluminum alloy to provide sufficient support without adding too much weight, and its design may include mounting holes or guide rails for fixing the battery module 20. The third cross beam 16 is located at the rear end of the battery pack and is mainly used to provide structural support at the rear. The material and design of the third cross beam 16 are similar to those of the first cross beam 14, and it is usually made of high-strength materials and may be designed with reinforcing structures to ensure reliability under various working conditions.

[0065] Specifically, when any cell experiences thermal runaway, the fire-fighting liquid will flow into the accommodation cavity 13 through the exhaust protection cover 40. The exhaust protection cover 40 not only has an exhaust function, but also allows the fire-fighting liquid to enter the accommodation cavity 13, thereby rapidly cooling the battery module 20. This cooling mechanism can suppress the spread of thermal runaway and reduce the risk of fire. The inflow of fire-fighting liquid can effectively absorb and isolate heat, preventing high temperatures from being transmitted to the external environment through the structure of the battery pack. Through this design, the battery pack can provide multiple levels of safety protection when facing extreme situations, ensuring that internal high temperatures do not affect the external environment when thermal runaway occurs, thereby protecting the safety of surrounding equipment and personnel.

[0066] In some examples, the fire-fighting liquid types can include: water-based extinguishing agents, such as water mist, which absorbs heat by rapid evaporation, suitable for reducing battery temperature, but requires caution to prevent electrical short circuits; additive aqueous solution, adding specific additives to water to improve cooling and extinguishing effect. Special battery extinguishing agents, such as fluorinated liquids, designed specifically for lithium battery fires, can effectively suppress thermal runaway and prevent rekindling; gel extinguishing agents, forming a heat insulation layer to prevent heat spread while suppressing flames. Chemical extinguishing agents, such as dry powder extinguishing agents, suitable for multiple fire types, but may leave residues when used inside the battery pack; aerosol extinguishing agents, which suppress flames through chemical reactions, suitable for enclosed spaces. Gas extinguishing agents, such as inert gases (nitrogen or argon), suitable for situations where the inside of the battery pack needs to be protected, and extinguish by reducing oxygen concentration. When selecting a fire-fighting liquid, its compatibility with the chemical composition of the battery, extinguishing efficiency, impact on the structure of the battery pack, and environmental and safety factors need to be considered.

[0067] In some embodiments, as shown in FIG. 1, Figure 2 The battery module 20 has a first direction X and a second direction Y intersecting each other, and includes a plurality of first single batteries 21 and a plurality of second single batteries 22, which are arranged in the first direction X. This arrangement makes the layout of the battery module 20 more compact and orderly, which helps to evenly distribute current and heat, improving the overall efficiency and heat dissipation performance of the battery pack. The second single battery 22 is arranged in the second direction Y with the first single battery 21. The pole 23 of the first single battery 21 is connected to the pole 23 of the second single battery 22; each first single battery 21 and each second single battery 22 is provided with an explosion-proof valve 30 on the side facing the upper cover 11.

[0068] It should be noted that the pole 23 of the first single battery 21 is connected to the pole 23 of the second single battery 22, which ensures stable and reliable electrical connection between the batteries and reduces resistance loss, improving the energy transmission efficiency of the battery pack. Each first single battery 21 and each second single battery 22 is provided with an explosion-proof valve 30 on the side facing the upper cover 11. This design provides independent safety protection for each battery cell, and the explosion-proof valve 30 can quickly release pressure when the internal pressure of the battery is too high or thermal runaway occurs, preventing the battery pack from exploding or other serious accidents. This independent explosion-proof valve 30 setting ensures that even if one battery cell has a problem, it will not affect other battery cells, thereby improving the overall safety of the battery pack.

[0069] Specifically, as shown in FIG. 2, Figure 1 and Figure 2As shown, all the explosion-proof valves 30 of the first single batteries 21 are covered by one exhaust protection cover 40, and all the explosion-proof valves 30 of the second single batteries 22 are covered by another exhaust protection cover 40. In addition, the exhaust protection cover 40 covering all the explosion-proof valves 30 of the first single batteries 21 and the exhaust protection cover 40 covering all the explosion-proof valves 30 of the second single batteries 22 can be in a communication state, facilitating the injection of fire-fighting liquid into the two exhaust protection covers 40 at the same time. This design facilitates the injection of fire-fighting agents into the two exhaust protection covers 40 at the same time, to provide more effective fire suppression and safety protection in emergency situations.

[0070] In some embodiments, referring to Figure 3 and Figure 4 , Figure 4 is another overall structure schematic view of the exhaust protection cover provided by the embodiments of the present application. The exhaust protection cover 40 includes a second bottom plate 41 and a first cover body 42. The second bottom plate 41 abuts against the side of the plurality of battery modules 20 facing the upper cover 11, providing a stable base. A through hole 48 is provided on the second bottom plate 41, allowing gas to be smoothly discharged when the explosion-proof valve 30 is activated. This design ensures that the gas can be effectively released from the battery module 20. The first cover body 42 is arranged on the side of the second bottom plate 41 facing the upper cover 11 and is connected with the second bottom plate 41, forming a closed protection space. This structure not only protects the internal components, but also ensures the clarity of the gas discharge path. The first cover body 42 and the second bottom plate 41 form a first channel 43, which plays a role in guiding the flow of gas. Through this design, the gas is concentrated and guided to the predetermined discharge path, reducing the impact on other components. One end of the first channel 43 is a first sealing end 44, which ensures that the gas can only be discharged through the predetermined path, preventing leakage to other areas. This sealing design improves the safety of the system and prevents accidental leakage of gas. The first opening end 45 is located at the other end of the first channel 43, providing an outlet for gas discharge. This design ensures that when the explosion-proof valve 30 is activated, the gas can be quickly and safely discharged to the external environment. Through the combination of these structures, the exhaust protection cover 40 not only provides physical protection for the battery module 20, but also ensures that the gas can be safely and effectively discharged in an emergency. This design improves the overall safety and reliability of the battery pack, reducing potential risks.

[0071] In some embodiments, referring to Figure 3 and Figure 5 , Figure 5A schematic diagram of a liquid inlet method for the exhaust protection cover provided by the embodiments of the present application. The exhaust protection cover 40 has a liquid inlet hole 46 located on the side of the second bottom plate 41 close to the first sealing end 44, allowing fire-fighting liquid to enter the containment cavity 13 to deal with emergency situations. The battery pack also includes a connecting pipe 50 and a liquid inlet pipe 60, one end of the connecting pipe 50 is connected and communicated with the liquid inlet hole 46, ensuring that the liquid can smoothly enter the interior of the exhaust protection cover 40. The other end of the liquid inlet pipe 60 is connected and communicated with the other end of the connecting pipe 50, and the other end of the liquid inlet pipe 60 is externally connected to the fire-fighting liquid. This design allows the rapid introduction of fire-fighting liquid through the liquid inlet pipe 60 directly into the exhaust protection cover 40 in emergency situations to cool the battery module 20 or extinguish possible fires. Through this structure, the battery pack not only provides protection when gas is discharged, but also responds quickly in emergency situations such as fire or overheating, providing cooling and fire extinguishing functions. This multi-level safety design significantly improves the overall safety and reliability of the battery pack, ensuring that the battery module 20 can effectively prevent more high temperatures in various emergency situations, thereby reducing the impact on the external environment of the battery pack. In some examples, as shown in Figure 5 the example has two connecting pipes 50, one connecting pipe 50 is connected with the exhaust protection cover 40 covering all the explosion-proof valves 30 of the first single battery 21, and the other connecting pipe 50 is connected with the exhaust protection cover 40 covering all the explosion-proof valves 30 of the second single battery 22. This design ensures that when the battery fails, gas can be quickly discharged through the explosion-proof valve 30 to prevent potential dangers caused by excessive pressure. The two connecting pipes 50 are further connected to the fire-fighting liquid system through the same liquid inlet pipe 60. This configuration allows fire-fighting liquid to be quickly delivered to the battery area through the liquid inlet pipe 60 in emergency situations to suppress the fire and reduce the temperature. This design not only improves the safety of the battery system, but also provides an effective emergency response mechanism to deal with battery thermal runaway or other emergency situations. In this way, the system can maximize the safety of the battery and the surrounding environment.

[0072] In some embodiments, as Figure 1As shown, the upper cover 11 is provided with a peripheral device 80 on one side wall in the second direction Y, which takes into account the functionality and space utilization of the device. The first sealing end 44 is arranged close to the peripheral device 80, ensuring that the flow path of gas or liquid can effectively protect the peripheral device 80 in an emergency. The first open end 45 is arranged away from the peripheral device 80, which is arranged to avoid potential damage to the peripheral device 80 caused by the gas discharged from the first open end 45. Through this design, the discharged gas can be guided to a position away from the peripheral device 80, thereby reducing the impact on the peripheral device 80. This structure not only optimizes the spatial layout inside the battery pack, but also significantly improves the safety and reliability of the overall system. Through the effective design of the gas discharge path, the battery pack can protect the peripheral device 80 in an emergency, ensuring that it is not affected by high temperature or harmful substances, thereby maintaining the stability and safety of the entire system. It should be noted that the peripheral device 80 includes but is not limited to fans, heaters, heat exchangers, sensors (including temperature sensors, voltage sensors, current sensors, and pressure sensors), charging interfaces, etc.

[0073] Specifically, when any cell experiences thermal runaway, the fire-fighting liquid is quickly introduced into the system through the liquid inlet pipe 60, and the connecting pipe 50 ensures that the fire-fighting liquid flows smoothly into the exhaust protection cover 40. During this process, the fire-fighting liquid flows from the first sealing end 44 to the first open end 45. At the same time, the smoke emitted by the explosion-proof valve 30 is also pushed by the fire-fighting liquid to the first open end 45. That is, both the smoke and the fire-fighting liquid will enter the containing cavity 13 from the first open end 45. The fire-fighting liquid not only cools the overheated cells during the flow process, but also effectively guides the smoke to a safe area to prevent it from accumulating inside the battery pack. In addition, the fire-fighting liquid entering the containing cavity 13 will cool all the battery modules 20, thereby avoiding the impact of high temperature inside the battery pack on the external environment. In this way, through this mechanism, the system can quickly respond in a thermal runaway event, ensuring the safety and stability of the battery pack, while protecting the surrounding environment from high temperature and smoke.

[0074] In some embodiments, please refer to Figure 6 , Figure 7 , Figure 8 , Figure 6 Another overall structure of the battery pack provided by the embodiments of the present application is shown in the following figure: Figure 7 The positional relationship between the first liquid cooling plate and the battery module provided by the embodiments of the present application is shown in the following figure: Figure 8A cross-sectional view of the first liquid cooling plate is provided for the embodiments of the present application. The battery pack also includes a first liquid cooling plate 70, which covers the side of the battery module 20 facing the upper cover 11 and is in abutment with the battery module 20. The exhaust protection cover 40 is integrated on the first liquid cooling plate 70. It should be noted that the function of the first liquid cooling plate 70 is to provide effective thermal management by covering the side of the battery module 20 facing the upper cover 11. The first liquid cooling plate 70 is in direct abutment with the battery module 20, ensuring that heat can be efficiently conducted from the battery module 20 to the cooling system, thereby maintaining the optimal working temperature of the battery, prolonging the battery life and improving performance. In addition, the exhaust protection cover 40 is integrated on the first liquid cooling plate 70, which helps to safely guide and manage the gas released by the battery in the event of thermal runaway or other abnormal conditions. The integrated design of the exhaust protection cover 40 not only saves space, but also improves the overall safety and structural integrity of the battery pack. Through this integrated way, the battery pack can achieve efficient thermal management and safety protection in a compact space.

[0075] Specifically, the connection between the first liquid cooling plate 70 and the battery module 20 can be achieved through various methods to ensure stability and effective heat conduction. Specifically, the first liquid cooling plate 70 can be fixed on the front third cross beam 16 by bolts, which provides reliable structural support and ensures that the liquid cooling plate remains stable during vehicle operation. In addition, it can be bonded to the top of the battery module 20 by structural adhesive, which not only helps to seal and protect the battery module 20, but also absorbs vibrations and impacts to some extent. At the same time, this bonding method can also connect multiple first single batteries 21 and multiple second single batteries 22 together, providing additional constraints and fixation to enhance the overall structural integrity of the battery module 20.

[0076] In some embodiments, the battery pack also includes a second liquid cooling plate (not shown in the figure), which covers the side of the battery module 20 facing the first bottom plate 12, providing additional thermal management functions. This design helps to effectively conduct and dissipate heat at the bottom of the battery module 20, ensuring that the battery remains within the optimal temperature range during operation.

[0077] It should be noted that the second liquid cooling plate can be integrated onto the first base plate 12. This integrated design not only saves space but also simplifies the structure and reduces the complexity of connections between components. By directly integrating the second liquid cooling plate onto the first base plate 12, heat transfer efficiency can be improved because heat can be transferred more directly from the battery module 20 to the cooling system. Furthermore, this integrated design also helps to enhance the overall structural strength and sealing of the battery pack, preventing coolant leakage. This dual liquid cooling plate configuration ensures that the battery module 20 receives adequate cooling under various operating conditions, extending battery life and improving its performance and safety. In some embodiments, please refer to... Figure 9 , Figure 10 , Figure 11 , Figure 9 Provided for the embodiments of this application Figure 8 Enlarged view of a portion of point A in the middle. Figure 10 This is a structural schematic diagram of the first liquid cooling plate provided in an embodiment of this application at one angle. Figure 11 This is a schematic diagram of the first liquid cooling plate provided in an embodiment of this application from another angle. The exhaust shield 40 includes a second shield 47, which covers and connects to the first liquid cooling plate 70, forming an independent second channel 71. The design of the second channel 71 helps manage airflow and heat inside the battery pack. One end of the second channel 71 is a second sealed end 72, ensuring that airflow within the second channel 71 does not leak, thereby improving system efficiency and safety. The other end of the second channel 71 is a second open end 73, allowing airflow to be discharged or entered as needed. This design helps establish a controlled airflow path inside the battery pack, optimizing thermal management and pressure balance. A through hole 48 is formed on the first liquid cooling plate 70 and communicates with the second channel 71. The through hole 48 allows flue gas to flow in the second channel 71 between the first liquid cooling plate 70 and the second shield 47, which helps establish a controlled airflow path inside the battery pack, thereby optimizing thermal management and pressure balance. Secondly, the through-hole 48 allows heat to be transferred more efficiently from the battery module 20 to the liquid cooling plate and carried away by airflow, which helps maintain the battery temperature within a safe range and prevents overheating. Furthermore, in the event of excessive internal pressure in the battery pack, the through-hole 48 can serve as a pressure release channel, preventing structural damage or safety hazards caused by pressure buildup. Finally, the design of the through-hole 48 can improve the efficiency of the cooling system, allowing the coolant or gas to be distributed more evenly on the surface of the liquid cooling plate, thereby improving the overall cooling effect. Through these functions, the through-hole 48 plays a crucial role in the safety, performance, and durability of the battery pack. In some embodiments, such as... Figure 9 , Figure 10 , Figure 11As shown, the first liquid cooling plate 70 includes a third bottom plate 74 and a third cover 75. The third bottom plate 74 covers the side of the battery module 20 facing the upper cover 11 and is in abutment with the battery module 20. This design ensures that heat can be effectively transferred from the battery module 20 to the liquid cooling plate. The third cover 75 is arranged on the side of the third bottom plate 74 facing the upper cover 11 and is connected with the third bottom plate 74. A plurality of flow channels 76 are formed between the third cover 75 and the third bottom plate 74. The presence of these flow channels 76 helps the cooling liquid to flow inside the liquid cooling plate, thereby improving the heat exchange efficiency. Through these flow channels 76, the cooling liquid can circulate inside the first liquid cooling plate 70, taking away the heat generated by the battery module 20. This design not only improves the cooling efficiency of the battery pack, but also helps to maintain the temperature of the battery within a safe range, preventing overheating, thereby improving the performance and life of the battery.

[0078] In some embodiments, the first liquid cooling plate 70 and the exhaust protection cover 40 with the second channel 71 are a stamping integrated structure. This integrated design, first of all, improves the structural integrity, because the integrated molding reduces the connection points between components, thereby improving the overall strength and durability, reducing the potential risk of leakage and failure. Secondly, the manufacturing efficiency is improved, and the stamping process simplifies the production process, reducing production costs and time. The thermal management is also optimized, and the close combination of the first liquid cooling plate 70 and the exhaust protection cover 40 improves the cooling efficiency, ensuring that the battery module 20 operates within the optimal temperature range. In addition, this design saves space, by integrating multiple functions into one component, reducing the overall volume and weight of the battery pack, which is particularly important for applications such as electric vehicles. By combining liquid cooling and exhaust management functions, this design provides an efficient and reliable solution, helping to improve the performance and safety of the battery pack.

[0079] The application also discloses a battery pack comprising the single battery cell as described above. Therefore, all the technical features and technical effects of the single battery cell described above can be obtained, and details are not repeated here.

[0080] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0081] The battery pack and the electric equipment provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment descriptions are only used to help understand the technical solutions of the present application and the core ideas thereof. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized by, The battery pack comprises: a box body (10) comprising an upper cover (11) and a first bottom plate (12), the upper cover (11) being covered on the first bottom plate (12) and connected with the first bottom plate (12), and a containing cavity (13) being formed between the upper cover (11) and the first bottom plate (12); a plurality of battery modules (20) arranged in the containing cavity (13) and connected with the first bottom plate (12); a plurality of explosion-proof valves (30) arranged on a side of the battery modules (20) facing the upper cover (11); an exhaust protection cover (40) arranged on a side of the battery modules (20) facing the upper cover (11) and covering the plurality of explosion-proof valves (30), the exhaust protection cover (40) being provided with a plurality of through holes (48), each of the through holes (48) being arranged around an outer periphery of one of the explosion-proof valves (30).

2. The battery pack of claim 1, wherein, The battery modules (20) have a first direction (X) and a second direction (Y) intersecting with each other, and the battery modules (20) comprise: a plurality of first single batteries (21) arranged at intervals along the first direction (X); a plurality of second single batteries (22) arranged at intervals along the first direction (X), the second single batteries (22) being arranged along the second direction (Y) with the first single batteries (21); wherein the pole (23) of the first single battery (21) is connected with the pole (23) of the second single battery (22), and each of the first single battery (21) and each of the second single battery (22) is provided with the explosion-proof valve (30) on a side facing the upper cover (11).

3. The battery pack of claim 2, wherein, The exhaust protection cover (40) comprises: a second bottom plate (41) abutting against a side of the plurality of battery modules (20) facing the upper cover (11), the through holes (48) being arranged on the second bottom plate (41); a first cover body (42) covered on a side of the second bottom plate (41) facing the upper cover (11) and connected with the second bottom plate (41); a first channel (43) being formed between the first cover body (42) and the second bottom plate (41), one end of the first channel (43) being a first sealing end (44) and the other end being a first opening end (45).

4. The battery pack of claim 3, wherein, The exhaust protection cover (40) has a liquid inlet hole (46) arranged on a side of the second bottom plate (41) close to the first sealing end (44); The battery pack further comprises: a connecting pipe (50) having one end connected and communicated with the liquid inlet hole (46); a liquid inlet pipe (60) having one end connected and communicated with the other end of the connecting pipe (50), and the other end of the liquid inlet pipe (60) being externally connected with fire-fighting liquid.

5. The battery pack of claim 3, wherein, The upper cover (11) is provided with a peripheral device (80) on one side wall in the second direction (Y); The first sealing end (44) is arranged close to the peripheral device (80), and the first opening end (45) is arranged away from the peripheral device (80).

6. The battery pack of claim 2, wherein, The battery pack further comprises a first liquid cooling plate (70) covering a side of the battery module (20) facing the upper cover (11) and abutting against the battery module (20), and the exhaust protection cover (40) is integrated on the first liquid cooling plate (70).

7. The battery pack of claim 6, wherein, The exhaust protection cover (40) comprises a second cover body (47) covering the first liquid cooling plate (70) and connected with the first liquid cooling plate (70); A second channel (71) is formed between the second cover body (47) and the first liquid cooling plate (70), one end of the second channel (71) is a second sealing end (72), and the other end is a second opening end (73); the through hole (48) is arranged on the first liquid cooling plate (70) and communicates with the second channel (71).

8. The battery pack of claim 7, wherein, The first liquid cooling plate (70) comprises: A third bottom plate (74) covering a side of the battery module (20) facing the upper cover (11) and abutting against the battery module (20); A third cover body (75) arranged on a side of the third bottom plate (74) facing the upper cover (11) and connected with the third bottom plate (74); Wherein, a plurality of flow channels (76) are formed between the third cover body (75) and the third bottom plate (74) and communicate with each other.

9. The battery pack of claim 8, wherein, The first liquid cooling plate (70) and the exhaust protection cover (40) having the second channel (71) are a stamping integrated structure.

10. An electric device, characterized by The battery pack comprises any one of the battery packs according to claims 1 to 9.

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