A battery pack and an electric device

Abstract

The utility model provides a kind of battery pack and electrical equipment, including box, multiple electric core and direct-cooling integrated module;The box is equipped with cooling medium chamber, to be used to accommodate coolant;Multiple The electric core is mounted in the box;The direct-cooling integrated module is arranged in the box, and the direct-cooling integrated module is connected with the cooling medium chamber, to be used to adjust the temperature of coolant.The battery pack of the utility model, electric core is directly mounted in the box of battery pack, cancels the module link in traditional battery pack, can significantly increase the internal space utilization of battery pack, improve the energy density of battery pack;In addition, since the battery pack directly sets direct-cooling integrated module in battery pack interior, the independent operation of battery pack can be realized, without relying on external liquid cooling mechanism, so as to avoid when liquid cooling mechanism fails, the problem that the heat management of all battery pack is failed, ensure the normal work of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack and an electrical device. Background Technology

[0002] As a key component of new energy vehicles, the structural safety and thermal management performance of batteries are of paramount importance.

[0003] In related technologies, a battery cluster is formed by connecting multiple battery packs in series or in parallel, and all battery packs are cooled by a cooling module within the battery cluster. This means that if the cooling module fails, the thermal management of the battery cluster will completely fail, and the battery cluster will become unusable. Utility Model Content

[0004] Embodiments of this utility model provide a battery pack and electrical equipment that can improve the technical problem of battery cluster thermal management being prone to complete failure.

[0005] In a first aspect, embodiments of the present invention provide a battery pack, comprising:

[0006] The housing has a cooling medium chamber for containing coolant;

[0007] Multiple battery cells, all of which are installed inside the housing; and,

[0008] A direct cooling integrated module is disposed inside the housing and connected to the cooling medium chamber for regulating the temperature of the coolant.

[0009] In one embodiment, the direct cooling integrated module includes a condenser and a compressor, wherein the condenser, the compressor, and the cooling medium chamber of the housing are connected to form a refrigerant circuit of the heat pump system, and the refrigerant circuit is used to supply refrigerant to circulate between the compressor, the condenser, and the cooling medium chamber;

[0010] The housing constitutes the evaporator in the heat pump system.

[0011] In this way, the coolant flows in the cooling medium chamber, absorbs heat and can be converted into a gaseous state, and then flows to the compressor. The compressor then converts the gaseous coolant into a liquid state, and after being cooled by the condenser, it flows back to the cooling medium chamber. Accordingly, the condenser can efficiently dissipate the heat in the coolant to the surrounding environment, reduce the temperature of the coolant and reduce the temperature difference, thereby improving the heat dissipation efficiency and thermal management stability of the battery pack.

[0012] In one embodiment, the housing further includes a base plate for supporting the battery cell, and the base plate is provided with the cooling medium chamber.

[0013] The cooling medium chamber is directly integrated into the base plate, allowing the coolant to be closer to the battery cells. Heat generated by the cells can be quickly conducted to the coolant in the cooling medium chamber through the base plate, achieving efficient heat exchange. Simultaneously, integrating the cooling medium chamber into the base plate reduces the space required, resulting in a more compact internal layout of the battery pack. Furthermore, placing the cooling medium chamber on the base plate ensures sufficient contact area between the cooling medium chamber and the battery cells, enabling a more efficient heat exchange process.

[0014] In summary, in the battery pack of this utility model, by directly integrating the cooling medium chamber into the base plate, efficient heat exchange is achieved, ensuring that the cells operate within the optimal operating temperature range, and ensuring that the battery pack can operate efficiently and stably under various operating conditions.

[0015] In one embodiment, the direct cooling integrated module is disposed at the corner of the base plate.

[0016] This ensures that the coolant cools all the battery cells before flowing into the direct-cooling integrated module, resulting in better cooling performance of the direct-cooling integrated module.

[0017] In one embodiment, the direct cooling integrated module further includes a fan, which is configured corresponding to the condenser to drive gas flow through and cool the condenser.

[0018] The fan further enhances heat dissipation by driving gas flow through the condenser, improving heat dissipation efficiency. It can also dynamically adjust the heat dissipation intensity according to the battery pack's temperature requirements, reducing the impact of ambient temperature. This synergistic effect not only ensures good heat dissipation for the battery pack under various operating conditions but also enhances its reliability, enabling independent operation in the event of external liquid cooling failure. This prevents a complete failure of the thermal management system, thereby improving the battery pack's safety and lifespan.

[0019] In one embodiment, the fan is detachably connected to the housing.

[0020] This connection method facilitates the maintenance and replacement of the wind turbine. When the turbine malfunctions or requires regular maintenance, maintenance personnel can quickly disassemble and repair or replace it, thereby reducing maintenance time and costs and improving the maintainability of the battery pack. Furthermore, the detachable connection enhances the system's flexibility, allowing the wind turbine to be replaced or upgraded according to different application scenarios and needs, further improving the adaptability and lifespan of the battery pack.

[0021] In one embodiment, the housing is further provided with an air duct, and the housing is provided with an air inlet and an air outlet, the air inlet and the air outlet being respectively connected to the air duct.

[0022] Understandably, by changing the shape, size, or internal structure of the air duct, the speed and flow rate of the airflow can be adjusted to adapt to different heat dissipation requirements, enabling the battery pack to maintain good heat dissipation performance under different operating conditions, thereby further improving the adaptability and service life of the battery pack.

[0023] In one embodiment, the direct cooling integrated module further includes a housing, the air duct being at least partially formed in the housing, and both the fan and the condenser being disposed in the air duct.

[0024] In this embodiment of the invention, by rationally designing the shape and direction of the air duct, the airflow is ensured to flow evenly through the condenser, thereby guiding the airflow to more effectively remove heat from the condenser surface, avoiding localized heat accumulation, and thus improving the performance of the entire heat dissipation system. Furthermore, the air duct design helps to minimize interference with airflow within the duct, resulting in more stable heat dissipation of the condenser, unaffected by unstable external airflow, and thus improving the stability and reliability of the heat dissipation system.

[0025] In summary, the air duct design not only improves heat dissipation efficiency and system stability, but also optimizes the spatial layout and enhances the flexibility and adaptability of the heat dissipation system, providing a strong guarantee for the efficient operation of the battery pack.

[0026] In one embodiment, the direct cooling integrated module further includes at least one sealing element, wherein the sealing element is provided between the air inlet and the housing; and / or, the sealing element is provided between the air outlet and the housing.

[0027] Seals prevent external dust and impurities from entering the battery pack. By installing seals at the air inlet and outlet, external dust, particles, and other impurities can be blocked from entering between the cells, thus keeping the cells clean and extending their lifespan. Furthermore, seals reduce airflow leakage during airflow through the ducts, ensuring that airflow follows the designed path within the ducts and preventing reduced heat dissipation efficiency due to leakage. Good sealing performance within the ducts also reduces pressure loss at the air inlet and outlet, improving fan efficiency.

[0028] In summary, the sealing components not only effectively prevent coolant leakage and the ingress of external impurities, but also maintain airflow stability and pressure balance within the duct, and reduce noise transmission, thereby improving the safety, reliability, and heat dissipation performance of the battery pack and providing strong support for its efficient operation and lifespan.

[0029] In one embodiment, there are at least two fans, and at least some of the fans are arranged along the length of the condenser.

[0030] At least some of the fans are arranged along the length of the condenser, which ensures that the airflow is more evenly distributed on the condenser surface, allowing the condenser to be cooled more fully, reducing the probability of local overheating of the condenser, and thus improving the heat dissipation efficiency of the direct cooling integrated module.

[0031] Understandably, the design of multiple fans also enhances the redundancy of the direct cooling integrated module. Even if one fan fails, the other fans can continue to work, maintaining the normal operation of the direct cooling integrated module, thereby improving the reliability and fault tolerance of the entire battery pack and effectively reducing the risk of battery pack overheating due to fan failure.

[0032] The direct cooling integrated module in this embodiment of the invention increases the gas flow through the condenser by setting multiple fans, thereby more effectively removing heat from the condenser surface, ensuring that the temperature of the coolant can be reduced quickly and kept stable, thus better meeting the heat dissipation requirements of the battery pack and reducing the probability of cell overheating due to insufficient heat dissipation.

[0033] In one embodiment, the housing further includes at least one dustproof net, the air inlet is provided with the dustproof net, and / or the air outlet is provided with the dustproof net.

[0034] Dust and impurities entering the battery pack can clog the condenser, leading to reduced heat dissipation efficiency and even malfunctions. Therefore, dust filters can effectively prevent external dust, particles, and other impurities from entering the battery pack, ensuring the long-term stable operation of the heat dissipation system. At the same time, the fan operating in a clean environment can reduce mechanical wear and malfunctions caused by dust, thereby reducing maintenance costs.

[0035] In addition, dust filters can reduce the risk of short circuits caused by dust entering the battery pack, thereby protecting the electronic components inside the battery pack and improving the safety and reliability of the battery pack.

[0036] In one embodiment, the battery pack further includes: a BDU integration module disposed within the housing; and an integrated busbar, through which multiple battery cells are connected to the BDU integration module.

[0037] In this embodiment, the BDU integrated module is set separately inside the battery pack, and the battery cells are connected to the BDU integrated module through an integrated busbar, replacing the traditional complex wiring harnesses and connectors. This reduces the problem of using multiple high-voltage wiring harnesses required for traditional battery pack series connection, reduces wiring harness costs, and greatly reduces battery pack failures caused by wiring harness connections.

[0038] It is understood that in this embodiment, the BDU integrated module is existing technology, used for controlling the high-voltage circuit, overload and short-circuit protection, charging management, etc. Specifically, it ensures the safe switching of the high-voltage circuit by controlling the connection or disconnection of the battery with the external high-voltage system through the main relay, and quickly cuts off the circuit in emergency situations (such as collision, short circuit, or system failure) to prevent the risk of electric shock or thermal runaway. Simultaneously, the BDU also has overcurrent and short-circuit protection functions, cutting off the circuit in case of abnormal current through fuses or fast-acting fuses to protect the battery and high-voltage components. Furthermore, the BDU is responsible for pre-charge management, gradually charging the high-voltage capacitor through the pre-charge circuit (pre-charge relay and resistor) during power-on to avoid damage to the equipment from instantaneous high current surges.

[0039] In one embodiment, the outer periphery of the direct cooling integrated module is covered with a heat insulation cover to separate the direct cooling integrated module from the battery cell; and / or, the outer periphery of the BDU integrated module is covered with a heat insulation cover to separate the BDU integrated module from the battery cell.

[0040] The direct-cooling integrated module may generate heat during operation, and the temperature of the battery cell needs to be strictly controlled to ensure its performance and lifespan. The heat shield can effectively isolate the heat transfer between the direct-cooling integrated module and the battery cell, prevent the heat of the direct-cooling integrated module from being transferred to the battery cell, avoid the battery cell from being affected by local overheating, thereby improving the thermal management efficiency of the entire battery pack and ensuring that the battery cell works within the optimal temperature range.

[0041] In addition, the heat shield reduces heat exchange between the direct-cooling integrated module and the battery cell, allowing the heat dissipation system of the direct-cooling integrated module to work more efficiently without the need for additional cooling capacity to offset the heat transferred to the battery cell, thereby ensuring the heat dissipation effect of the direct-cooling integrated module on the battery pack.

[0042] In summary, the design of the heat shield surrounding the direct-cooling integrated module in the battery pack of this invention significantly improves the system's thermal management efficiency and safety. The heat shield effectively isolates heat transfer between the direct-cooling integrated module and the battery cell, preventing the battery cell from being affected by localized overheating, while also protecting the battery cell from transient thermal shocks and extending its service life.

[0043] Similarly, the BDU integrated module may generate heat during operation, and the temperature of the battery cell needs to be strictly controlled to ensure its performance and lifespan. The heat shield can effectively isolate the heat transfer between the BDU integrated module and the battery cell, prevent the heat of the BDU integrated module from being transferred to the battery cell, avoid the battery cell from being affected by local overheating, thereby improving the thermal management efficiency of the entire battery pack and ensuring that the battery cell works within the optimal temperature range.

[0044] Secondly, embodiments of this utility model provide an electrical device that includes the aforementioned battery pack.

[0045] The beneficial effects of the embodiments of this utility model are as follows:

[0046] In this battery pack, the battery cells are directly installed inside the battery pack housing, eliminating the module component found in traditional battery packs. This significantly increases the internal space utilization of the battery pack and improves its energy density. Furthermore, since the direct cooling integrated module is directly located inside the battery pack, it enables independent operation of the battery pack without relying on an external liquid cooling mechanism. This avoids the problem of thermal management failure of the entire battery pack when the liquid cooling mechanism fails, ensuring the normal operation of the battery pack. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0049] Figure 2 This is an exploded view of the battery pack provided in an embodiment of this utility model;

[0050] Figure 3 yes Figure 1 A cross-sectional view of the direct-cooling integrated module in the battery pack shown;

[0051] Figure 4 This is a cross-sectional view of the battery pack provided in an embodiment of the present invention;

[0052] Figure 5 At Figure 4 A magnified view of a section at point A in the middle;

[0053] Figure 6 yes Figure 2 A magnified view of a section at point B in the middle;

[0054] Figure 7 yes Figure 1 The cross-sectional view of the BDU integrated module in the battery pack shown.

[0055] Marked in the image:

[0056] 1. Battery pack;

[0057] 100. Enclosure; 101. Cooling medium chamber; 102. Air duct; 103. Air inlet; 104. Air outlet; 105. Dust filter; 106. Lower enclosure; 1061. Mounting cavity; 1062. Opening; 1063. Base plate; 1064. Mounting slot; 107. Cover;

[0058] 200. Battery cells;

[0059] 300. Direct cooling integrated module; 301. Condenser; 302. Fan; 303. Compressor; 304. Housing;

[0060] 400, BDU integrated module;

[0061] 500. Integrated busbar;

[0062] 600. Heat insulation cover. Detailed Implementation

[0063] 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0064] Reference Figures 1 to 2 As shown, an embodiment of the present invention provides a battery pack 1, which includes a housing 100, a plurality of battery cells 200 and a direct cooling integrated module 300. The housing 100 is provided with a cooling medium chamber 101 for containing coolant; the plurality of battery cells 200 are all installed in the housing 100; and the direct cooling integrated module 300 is disposed in the housing 100 and connected to the cooling medium chamber 101 for regulating the temperature of the coolant.

[0065] The housing 100 serves a load-bearing function, supporting the battery cell 200 and the direct-cooling integrated module 300, and providing a certain degree of protection for both. The housing 100 can be made of materials such as metal, alloy, or engineering plastics, thereby ensuring that the housing 100 has good structural strength and a long service life, thus making the battery pack 1 in this embodiment of the present invention have high strength.

[0066] By using this battery pack 1, the battery cells 200 are directly installed inside the housing 100, eliminating the module component in the traditional battery pack 1. This significantly increases the internal space utilization of the battery pack 1 and improves its energy density. Furthermore, since the direct cooling integrated module 300 is directly placed inside the battery pack 1, it can operate independently without relying on an external liquid cooling mechanism. This avoids the problem that the thermal management of the entire battery pack 1 will fail when the liquid cooling mechanism fails, thus ensuring the normal operation of the battery pack 1.

[0067] In some embodiments, refer to Figure 3 As shown, the direct cooling integrated module 300 includes a condenser 301 and a compressor 303. The condenser 301, the compressor 303 and the cooling medium chamber 101 of the housing 100 are connected to form a refrigerant circuit of the heat pump system. The refrigerant circuit is used to supply refrigerant to circulate between the compressor 303, the condenser 301 and the cooling medium chamber 101. The housing 100 constitutes the evaporator in the heat pump system.

[0068] In this way, the coolant flows in the cooling medium chamber, absorbs heat and can be converted into a gaseous state, and then flows to the compressor. The compressor then converts the gaseous coolant into a liquid state, and after being cooled by the condenser, it flows back to the cooling medium chamber. Accordingly, the condenser 301 can efficiently dissipate the heat in the coolant to the surrounding environment, reduce the temperature of the coolant and reduce the temperature difference, thereby improving the heat dissipation efficiency and thermal management stability of the battery pack 1.

[0069] It is understood that in this embodiment, the direct cooling integrated module 300 also includes an expansion valve, which can throttle and reduce the pressure of the coolant from the condenser to a low-temperature, low-pressure liquid before sending it into the evaporator.

[0070] In some embodiments, refer to Figure 4 and Figure 5 As shown, the housing 100 also includes a base plate 1063, which is used to support the battery cell 200. The base plate 1063 is provided with a cooling medium chamber 101.

[0071] The cooling medium chamber 101 is directly integrated into the base plate 1063, allowing the coolant to be closer to the battery cell 200. The heat generated by the battery cell 200 can be quickly conducted to the coolant in the cooling medium chamber 101 through the base plate 1063, thereby achieving efficient heat exchange. At the same time, the integration of the cooling medium chamber 101 into the base plate 1063 reduces the additional space occupied, making the internal spatial layout of the battery pack 1 more compact, and the battery cells 200 can be arranged more closely in the mounting slot 1064. In addition, placing the cooling medium chamber 101 on the base plate 1063 ensures the contact area between the cooling medium chamber 101 and the battery cell 200, thereby achieving a more efficient heat exchange process.

[0072] In summary, in the battery pack 1 of this utility model, by directly integrating the cooling medium chamber 101 into the base plate 1063, efficient heat exchange is achieved, ensuring that the battery cell 200 operates within the optimal operating temperature range, and ensuring that the battery pack 1 can operate efficiently and stably under various operating conditions.

[0073] In some embodiments, the direct cooling integrated module 300 is disposed at the corner of the base plate 1063.

[0074] In this way, the coolant can be used to cool all the cells 200 before flowing into the direct cooling integrated module 300, thus making the cooling effect of the direct cooling integrated module 300 better.

[0075] In some embodiments, refer to Figure 6 As shown, the direct cooling integrated module 300 also includes a fan 302, which is provided corresponding to the condenser 301 to drive gas flow through and cool the condenser 301.

[0076] The fan 302 further enhances the heat dissipation effect and improves the heat dissipation efficiency by driving the gas flow through the condenser 301. It can also dynamically adjust the heat dissipation intensity according to the temperature requirements of the battery pack 1, reducing the impact of ambient temperature. The synergistic effect of both ensures that the battery pack 1 maintains good heat dissipation under various operating conditions and enhances its reliability, enabling it to operate independently in the event of external liquid cooling failure, avoiding a complete failure of the thermal management system, thereby improving the safety and service life of the battery pack 1.

[0077] In some embodiments, the fan 302 is detachably connected to the housing 100.

[0078] This connection method facilitates the maintenance and replacement of the fan 302. When the fan 302 malfunctions or requires regular maintenance, maintenance personnel can quickly disassemble and repair or replace it, thereby reducing maintenance time and costs and improving the maintainability of the battery pack 1. In addition, the detachable connection also improves the system's flexibility, allowing the fan 302 to be replaced or upgraded according to different application scenarios and needs, further enhancing the adaptability and service life of the battery pack 1.

[0079] In some embodiments, the housing 100 is further provided with an air duct 102, and the housing 100 is provided with an air inlet 103 and an air outlet 104, which are respectively connected to the air duct 102.

[0080] It is understandable that by changing the shape, size, or internal structure of the air duct 102, the speed and flow rate of the airflow can be adjusted to adapt to different heat dissipation requirements, so that the battery pack 1 can maintain good heat dissipation performance under different operating conditions, further improving the adaptability and service life of the battery pack 1.

[0081] In some embodiments, the direct cooling integrated module 300 further includes a housing 304, with an air duct 102 at least partially formed in the housing 304, and both the fan 302 and the condenser 301 disposed in the air duct 102.

[0082] In this embodiment of the invention, by rationally designing the shape and direction of the air duct 102, the airflow is ensured to flow evenly through the condenser 301, thereby guiding the airflow to more effectively remove heat from the surface of the condenser 301, avoiding localized heat accumulation, and thus improving the performance of the entire heat dissipation system. Furthermore, the arrangement of the air duct 102 helps to minimize interference with the airflow within it, resulting in a more stable heat dissipation effect of the condenser 301, unaffected by unstable external airflow, thereby improving the stability and reliability of the heat dissipation system.

[0083] In summary, the design of the air duct 102 not only improves heat dissipation efficiency and system stability, but also optimizes the spatial layout and enhances the flexibility and adaptability of the heat dissipation system, providing a strong guarantee for the efficient operation of the battery pack 1.

[0084] In some embodiments, the direct cooling integrated module 300 further includes at least one seal, and a seal is provided between the air inlet 103 and the housing 304.

[0085] In some embodiments, a seal is provided between the air outlet 104 and the housing 304.

[0086] The seals prevent external dust and impurities from entering the battery pack 1. By installing seals at the air inlet 103 and air outlet 104, external dust, particles, and other impurities can be blocked from entering between the battery cells 200, thereby keeping the battery cells 200 clean and extending their service life. Furthermore, the seals reduce airflow leakage in the air inlet and outlet duct 102, ensuring that the airflow follows the designed path within the duct 102, preventing reduced heat dissipation efficiency due to airflow leakage. The good sealing performance in the air duct 102 also reduces pressure loss at the air inlet and outlet 104, improving the operating efficiency of the fan 302.

[0087] In summary, the sealing components not only effectively prevent coolant leakage and the entry of external impurities, but also maintain the stability of airflow and pressure balance within the air duct 102, and reduce noise propagation, thereby improving the safety, reliability, and heat dissipation performance of the battery pack 1, and providing strong support for the efficient operation and service life of the battery pack 1.

[0088] In some embodiments, refer to Figure 6 As shown, there are at least two fans 302, and at least some of the fans 302 are arranged along the length of the condenser 301.

[0089] At least some of the fans 302 are arranged along the length of the condenser 301, which can ensure that the airflow is more evenly distributed on the surface of the condenser 301, so that the condenser 301 can be cooled more fully, reducing the probability of local overheating of the condenser 301, thereby improving the heat dissipation efficiency of the direct cooling integrated module 300.

[0090] Understandably, the design of multiple fans 302 also enhances the redundancy of the direct cooling integrated module 300. Even if one fan 302 fails, the other fans 302 can still continue to work, maintaining the normal operation of the direct cooling integrated module 300, thereby improving the reliability and fault tolerance of the entire battery pack 1 and effectively reducing the risk of overheating of the battery pack 1 due to the failure of the fan 302.

[0091] The direct cooling integrated module 300 in this embodiment of the present invention can increase the gas flow through the condenser 301 by setting multiple fans 302, thereby more effectively removing the heat from the surface of the condenser 301, ensuring that the temperature of the coolant can be reduced quickly and kept stable, thus better meeting the heat dissipation requirements of the battery pack 1 and reducing the probability of the battery cell 200 overheating due to insufficient heat dissipation.

[0092] In some embodiments, refer to Figure 2 As shown, the housing 100 also includes at least one dustproof net 105, and the air inlet 103 is provided with a dustproof net 105.

[0093] In some embodiments, the air outlet 104 is provided with a dustproof net 105.

[0094] The entry of dust and impurities may cause blockage of the condenser 301, resulting in a decrease in heat dissipation efficiency or even malfunction. Therefore, the dustproof net 105 can effectively block external dust, particles and other impurities from entering the battery pack 1, ensuring the long-term stable operation of the heat dissipation system. At the same time, the fan 302 operating in a clean environment can also reduce mechanical wear and malfunctions caused by dust entry, thereby reducing maintenance costs.

[0095] In addition, the dustproof mesh 105 can reduce the risk of short circuits caused by dust entering, thereby protecting the electronic components inside the battery pack 1 and improving the safety and reliability of the battery pack 1.

[0096] In some embodiments, refer to Figure 2 As shown, the battery pack 1 also includes: a BDU integration module 400, which is disposed inside the housing 100; and an integrated busbar 500, through which multiple battery cells 200 are connected to the BDU integration module 400.

[0097] In this embodiment, the BDU integrated module 400 is separately disposed inside the battery pack 1, and the battery cell 200 is connected to the BDU integrated module 400 through the integrated busbar 500, replacing the traditional complex wiring harness and connectors. This reduces the problem of using multiple high-voltage wiring harnesses in the traditional series connection of the battery pack 1, reduces wiring harness costs, and greatly reduces battery pack 1 failures caused by wiring harness connections.

[0098] It is understood that in this embodiment, the BDU integrated module 400 is prior art, used for controlling the high-voltage circuit, overload and short-circuit protection, charging management, etc. Specifically, it ensures the safe switching of the high-voltage circuit by controlling the connection or disconnection of the battery with the external high-voltage system through the main relay, and quickly cuts off the circuit in emergency situations (such as collision, short circuit, or system failure) to prevent the risk of electric shock or thermal runaway. Simultaneously, the BDU also has overcurrent and short-circuit protection functions, cutting off the circuit in case of abnormal current through fuses or fast-acting fuses to protect the battery and high-voltage components. Furthermore, the BDU is responsible for pre-charge management, gradually charging the high-voltage capacitor through the pre-charge circuit (pre-charge relay and resistor) during power-on to avoid damage to the equipment from instantaneous high current surges.

[0099] In some embodiments, refer to Figure 4 and Figure 7 As shown, the direct-cooling integrated module 300 is surrounded by a heat shield 600 to separate the direct-cooling integrated module 300 from the battery cell 200. The direct-cooling integrated module 300 may generate heat during operation, while the temperature of the battery cell 200 needs to be strictly controlled to ensure its performance and lifespan. The heat shield 600 effectively isolates heat transfer between the direct-cooling integrated module 300 and the battery cell 200, preventing heat from the direct-cooling integrated module 300 from being transferred to the battery cell 200. This avoids the battery cell 200's performance being affected by localized overheating, thereby improving the overall thermal management efficiency of the battery pack 1 and ensuring that the battery cell 200 operates within its optimal temperature range.

[0100] In addition, the heat shield 600 reduces the heat exchange between the direct cooling integrated module 300 and the battery cell 200, allowing the heat dissipation system of the direct cooling integrated module 300 to work more efficiently without the need for additional cooling capacity to offset the heat transferred to the battery cell 200, thereby ensuring the heat dissipation effect of the direct cooling integrated module 300 on the battery pack 1.

[0101] In summary, the design of the heat shield 600 surrounding the direct-cooling integrated module 300 in the battery pack 1 of this utility model significantly improves the thermal management efficiency and safety of the system. The heat shield 600 can effectively isolate heat transfer between the direct-cooling integrated module 300 and the battery cell 200, preventing the battery cell 200 from being affected by local overheating, while protecting the battery cell 200 from transient thermal shock and extending its service life.

[0102] In some embodiments, the outer periphery of the BDU integrated module 400 is covered with a heat insulation cover 600 to separate the BDU integrated module 400 from the battery cell 200.

[0103] Similarly, the BDU integrated module 400 may generate heat during operation, and the temperature of the battery cell 200 needs to be strictly controlled to ensure its performance and lifespan. The heat shield 600 can effectively isolate the heat transfer between the BDU integrated module 400 and the battery cell 200, prevent the heat of the BDU integrated module 400 from being transferred to the battery cell 200, avoid the battery cell 200 from being affected by local overheating, thereby improving the thermal management efficiency of the entire battery pack 1 and ensuring that the battery cell 200 works within the optimal temperature range.

[0104] In some embodiments, the housing 100 includes: a lower housing 106, the housing 100 having a mounting cavity 1061 and an opening 1062 communicating with the mounting cavity 1061, the lower housing 106 including a bottom plate 1063 facing the opening 1062, the bottom plate 1063 having a plurality of mounting grooves 1064 on the side near the battery cell 200, the bottom surface of the battery cell 200 being bonded to the mounting grooves 1064; and a cover 107, the cover 107 being connected to the lower housing 106 to close the opening 1062.

[0105] The bottom surface of the battery cell 200 is bonded to the mounting groove 1064. This fixing method can ensure that the battery cell 200 is firmly positioned in the mounting groove 1064, reducing the vibration and displacement of the battery cell 200 during operation. The design of the mounting groove 1064 allows the battery cell 200 to be closely arranged on the bottom plate 1063 of the lower housing 106, making full use of the space of the mounting cavity 1061.

[0106] In summary, the design of the lower housing 106 and the cover 107 in the battery pack 1 of this utility model significantly improves the installation stability of the battery cell 200. The mounting groove 1064 and the bonding method ensure that the battery cell 200 is firmly positioned, reducing vibration and displacement, optimizing the internal space utilization of the battery pack 1, and improving the energy density.

[0107] Secondly, embodiments of this utility model also provide an electrical device, including the aforementioned battery pack 1.

[0108] This electrical device has all the beneficial effects of the aforementioned battery pack 1:

[0109] By using this electrical device, the battery cell 200 is directly installed inside the housing 100, eliminating the module component in the traditional battery pack 1. This significantly increases the internal space utilization of the battery pack 1 and improves its energy density. Furthermore, since the direct cooling integrated module 300 is directly placed inside the battery pack 1, it can operate independently without relying on an external liquid cooling mechanism. This avoids the problem that the thermal management of the entire battery pack 1 will fail when the liquid cooling mechanism fails, thus ensuring the normal operation of the battery pack 1.

[0110] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized by, include: The housing (100) is provided with a cooling medium chamber (101) for containing coolant; Multiple battery cells (200), all of which are installed within the housing (100); and, A direct cooling integrated module (300) is disposed inside the housing (100) and is connected to the cooling medium chamber (101) for adjusting the temperature of the coolant.

2. The battery pack of claim 1, wherein, The direct cooling integrated module (300) includes a condenser (301) and a compressor (303). The condenser (301), the compressor (303), and the cooling medium chamber (101) of the housing (100) are connected to form a refrigerant circuit of the heat pump system. The refrigerant circuit is used to allow the refrigerant to circulate between the compressor (303), the condenser (301), and the cooling medium chamber (101). The housing (100) constitutes the evaporator in the heat pump system.

3. The battery pack of claim 2, wherein, The housing (100) also includes a base plate (1063), which is used to support the battery cell (200) and is provided with the cooling medium chamber (101).

4. The battery pack of claim 3, wherein, The direct cooling integrated module (300) is located at the corner of the base plate (1063).

5. The battery pack of any one of claims 2-4, wherein, The direct cooling integrated module (300) also includes a fan (302), which is provided corresponding to the condenser (301) to drive gas to flow through and cool the condenser (301).

6. The battery pack of claim 5, wherein, The fan (302) is detachably connected to the housing (100).

7. The battery pack of claim 5, wherein, The housing (100) is also provided with an air duct (102), and the housing (100) is provided with an air inlet (103) and an air outlet (104), and the air inlet (103) and the air outlet (104) are respectively connected to the air duct (102).

8. The battery pack of claim 7, wherein, in, The direct cooling integrated module (300) also includes a housing (304), the air duct (102) is at least partially formed in the housing (304), and the fan (302) and the condenser (301) are both disposed in the air duct (102).

9. The battery pack of claim 8, wherein, The direct cooling integrated module (300) further includes at least one sealing element, which is provided between the air inlet (103) and the housing (304); and / or, the sealing element is provided between the air outlet (104) and the housing (304).

10. The battery pack of any one of claims 6-9, wherein, There are at least two fans (302), and at least some of the fans (302) are arranged along the length of the condenser (301).

11. The battery pack of claim 7, wherein, The housing (100) also includes at least one dustproof net (105), the air inlet (103) is provided with the dustproof net (105), and / or the air outlet (104) is provided with the dustproof net (105).

12. The battery pack of claim 1, wherein, The battery pack (1) also includes: BDU integrated module (400), the BDU integrated module (400) being disposed within the housing (100); and, An integrated busbar (500) is provided, through which multiple battery cells (200) are connected to the BDU integrated module (400).

13. The battery pack of claim 12, wherein, The outer periphery of the direct cooling integrated module (300) is covered with a heat insulation cover (600) to separate the direct cooling integrated module (300) from the battery cell (200); and / or, the outer periphery of the BDU integrated module (400) is covered with a heat insulation cover (600) to separate the BDU integrated module (400) from the battery cell (200).

14. An electrical device, characterized by Includes the battery pack (1) as described in any one of claims 1-13.

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