Battery pack and electric equipment

Abstract

The invention provides a battery pack and electric equipment. The battery pack comprises a box body, a plurality of battery cells and a direct cooling integrated module, the box body is provided with a cooling medium cavity used for containing cooling liquid. The plurality of battery cells are arranged in the box body; the direct cooling integration module is arranged in the box body, and the direct cooling integration module is connected with the cooling medium cavity so as to be used for adjusting the temperature of the cooling liquid. In the battery pack disclosed by the invention, the battery cells are directly mounted in the box body of the battery pack, so that a module link in a traditional battery pack is cancelled, the internal space utilization rate of the battery pack can be remarkably increased, and the energy density of the battery pack is improved; besides, as the direct cooling integrated module is directly arranged in the battery pack, the battery pack can operate independently without depending on an external liquid cooling mechanism, so that the problem that the thermal management of all the battery packs fails when the liquid cooling mechanism fails is avoided, and the normal work of the battery pack is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and an electric device. BACKGROUND

[0002] As a key core component of new energy vehicles, the structure safety and thermal management performance of a battery are very important.

[0003] In the related art, a battery cluster is formed by a plurality of battery packs in series or parallel connection, and cooling of all the battery packs is achieved by a cooling module in the battery cluster, which also leads to complete failure of the thermal management of the battery cluster and the battery cluster cannot be used when the cooling module fails. SUMMARY

[0004] Embodiments of the present application provide a battery pack and an electric device, which can improve the technical problem that the thermal management of a battery cluster is easily completely failed.

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

[0006] a box body, the box body being provided with a cooling medium chamber for accommodating a cooling liquid;

[0007] a plurality of battery cells, the plurality of battery cells being mounted in the box body; and

[0008] a direct cooling integrated module, the direct cooling integrated module being arranged in the box body and connected with the cooling medium chamber to adjust the temperature of the cooling liquid.

[0009] In an embodiment, the direct cooling integrated module comprises a condenser and a compressor, the condenser, the compressor and the cooling medium chamber of the box body being in communication to constitute a refrigerant circuit of a heat pump system, the refrigerant circuit being used for circulating flow of refrigerant between the compressor, the condenser and the cooling medium chamber.

[0010] The box body constitutes an evaporator in the heat pump system.

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

[0012] In an embodiment, the box body further comprises a bottom plate for bearing the battery cells, and the bottom plate is provided with the cooling medium chamber.

[0013] The cooling medium chamber is directly integrated in the bottom plate, so that the cooling liquid can be closer to the battery cells, and the heat generated by the battery cells can be quickly conducted to the cooling liquid in the cooling medium chamber through the bottom plate, thereby realizing efficient heat exchange; at the same time, the cooling medium chamber is integrated in the bottom plate, thereby reducing the additional space occupied, so that the space layout inside the battery pack is more compact. In addition, by arranging the cooling medium chamber on the bottom plate, the contact area between the cooling medium chamber and the battery cells can be ensured, so as to realize a more efficient heat exchange process.

[0014] In summary, in the battery pack of the present application, by directly integrating the cooling medium chamber in the bottom plate, efficient heat exchange is realized, the battery cells are ensured to operate within the optimal working temperature range, and the battery pack is ensured to operate efficiently and stably under various working conditions.

[0015] In an embodiment, the direct cooling integrated module is arranged at a corner of the bottom plate.

[0016] In this way, it can be ensured that the cooling liquid cools all the battery cells before flowing into the direct cooling integrated module, so that the cooling effect of the direct cooling integrated module is better.

[0017] In an embodiment, the direct cooling integrated module further comprises a fan corresponding to the condenser, for driving gas to flow through and cool the condenser.

[0018] The fan further enhances the heat dissipation effect and improves the heat dissipation efficiency by driving gas to flow through the condenser, and can dynamically adjust the heat dissipation intensity according to the temperature demand of the battery pack, thereby reducing the influence of the environment temperature. The synergistic effect of the two not only ensures that the battery pack can maintain good heat dissipation effect under various working conditions, but also enhances the reliability of the battery pack, so that it can independently operate when the external liquid cooling mechanism fails, avoids the overall failure of the thermal management system, and thereby improves the safety and service life of the battery pack.

[0019] In an embodiment, the fan is detachably connected to the box.

[0020] This connection mode facilitates the maintenance and replacement of the fan. When the fan fails or needs regular maintenance, maintenance personnel can quickly detach and repair or replace it, thereby reducing maintenance time and cost and improving the maintainability of the battery pack. In addition, detachable connection also improves the flexibility of the system, so that the fan can be replaced or upgraded according to different application scenarios and needs, further improving the adaptability and service life of the battery pack.

[0021] In an embodiment, the box is further provided with an air duct, and the box is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively communicated with the air duct.

[0022] It can be understood that by changing the shape, size or internal structure of the air duct, the speed and flow of the air flow can be adjusted to adapt to different heat dissipation needs, so that the battery pack can maintain good heat dissipation performance under different working conditions, further improving the adaptability and service life of the battery pack.

[0023] In an embodiment, the direct cooling integrated module further comprises a housing, the air duct is at least partially formed in the housing, and the fan and the condenser are both arranged in the air duct.

[0024] In the embodiment of the present application, by reasonably designing the shape and direction of the air duct, it is ensured that the air flow uniformly flows through the condenser, so that the air flow more effectively carries away the heat on the surface of the condenser, avoiding the accumulation of heat in a local area, and further improving the performance of the entire heat dissipation system. The arrangement of the air duct helps to reduce the interference of the air flow in the air duct, and the heat dissipation effect of the condenser is more stable and will not be affected by the instability of external air flow, thereby improving the stability and reliability of the heat dissipation system.

[0025] In summary, the arrangement of the air duct not only improves the heat dissipation efficiency and the stability of the system, but also optimizes the space 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 an embodiment, the direct cooling integrated module further comprises at least one sealing element, the sealing element being arranged between the air inlet and the housing, and / or the sealing element being arranged between the air outlet and the housing.

[0027] The sealing element can prevent external dust and impurities from entering the inside of the battery pack. By arranging the sealing element at the air inlet and the air outlet, it can block the entry of external dust, particulate matter and other impurities between the battery cells, thereby maintaining the cleanliness of the battery cells and prolonging the service life of the battery cells. The sealing element can reduce the leakage of air flow when entering and exiting the air duct, ensure that the air flow flows in the air duct according to the designed path, avoid the reduction of heat dissipation efficiency caused by air flow leakage, and the good sealing performance in the air duct can also reduce the pressure loss of air flow at the air inlet and outlet, and improve the working efficiency of the fan.

[0028] In summary, the arrangement of the sealing element not only effectively prevents the leakage of cooling liquid and the entry of external impurities, but also maintains the stability of the air flow and the pressure balance in the air duct, and reduces the transmission of noise, thereby improving the safety, reliability and heat dissipation performance of the battery pack, and providing a strong guarantee for the efficient operation and service life of the battery pack.

[0029] In an embodiment, the fan has at least two, and at least part of the fans are arranged along the length direction of the condenser.

[0030] At least part of the fans are arranged along the length direction of the condenser, which can ensure that the air flow is more evenly distributed on the surface of the condenser, so that the condenser can be more fully cooled, and the probability of local overheating of the condenser is reduced, thereby improving the heat dissipation efficiency of the direct cooling integrated module.

[0031] It can be understood that the design of multiple fans also enhances the redundancy of the direct cooling integrated module, so that even if one of the fans fails, the other fans can still continue to work to maintain 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 the embodiment of the application can increase the gas flow through the condenser by arranging multiple fans, thereby more effectively removing the heat on the surface of the condenser, ensuring that the temperature of the cooling liquid can be quickly reduced and stabilized, and thereby better meeting the heat dissipation needs of the battery pack and reducing the probability of battery cell overheating due to insufficient heat dissipation.

[0033] In an embodiment, the box further comprises at least one dust screen, and the air inlet is provided with the dust screen, and / or the air outlet is provided with the dust screen.

[0034] The entry of dust and impurities can cause the condenser to be blocked, thereby causing the heat dissipation efficiency to decrease and even causing a failure, therefore, the dust screen can effectively block the entry of dust, particulate matter and other impurities from the outside into the battery pack, ensuring the long-term stable operation of the heat dissipation system; at the same time, the operation of the fan in a clean environment can also reduce mechanical wear and failure caused by the entry of dust, thereby reducing maintenance costs.

[0035] In addition, the dust screen can also reduce the risk of short circuit caused by the entry of dust, thereby protecting the electronic elements inside the battery pack and improving the safety and reliability of the battery pack.

[0036] In an embodiment, the battery pack further comprises a BDU integrated module arranged in the box, and an integrated busbar, and the plurality of battery cells are connected to the BDU integrated module through the integrated busbar.

[0037] In the embodiment, the BDU integrated module is separately arranged in the battery pack, and the battery cells are connected to the BDU integrated module through the integrated busbar, replacing the traditional complex wire harness and connecting piece, thereby reducing the problem of using multiple high-voltage wire harnesses in the traditional battery pack in series, reducing the cost of the wire harness, and also greatly reducing the battery pack failure caused by the wire harness connection.

[0038] It can be understood that in the present embodiment, the BDU integrated module is a prior art for controlling the high-voltage loop, overload and short-circuit protection, charge management, etc., specifically: safe on-off of the high-voltage loop, controlling the connection or disconnection of the battery and the external high-voltage system through the main relay, and quickly cutting off the circuit in an emergency (such as a collision, short circuit or system failure) to prevent the risk of electric shock or thermal runaway; at the same time, the BDU also has overcurrent and short-circuit protection functions, cutting off the circuit at an abnormal current through a fuse or a quick-fuse device to protect the battery and high-voltage components. In addition, the BDU is responsible for pre-charge management, gradually charging the high-voltage capacitor through a pre-charge loop (pre-charge relay and resistor) when power is turned on, avoiding damage to the equipment caused by instantaneous large current impact.

[0039] In an embodiment, the outer periphery of the direct cooling integrated module is wrapped with a heat shield for separating the direct cooling integrated module from the battery cell; and / or, the outer periphery of the BDU integrated module is wrapped with a heat shield for separating 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 service life. 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 performance of the battery cell 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 the heat exchange between the direct cooling integrated module and the battery cell, so that the heat dissipation system of the direct cooling integrated module can 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, in the battery pack of the present application, the design of wrapping the outer periphery of the direct cooling integrated module with a heat shield significantly improves the thermal management efficiency and safety of the system. The heat shield can effectively isolate the heat transfer between the direct cooling integrated module and the battery cell, prevent the performance of the battery cell from being affected by local overheating, and at the same time protect the battery cell from transient thermal shock and prolong 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 service life. 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 performance of the battery cell 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] In a second aspect, an embodiment of the present application provides a power utilization device comprising the above-mentioned battery pack.

[0045] Advantages of embodiments of the present application:

[0046] In the battery pack of the present application, the battery cell is directly installed in the box of the battery pack, the module link in the traditional battery pack is cancelled, the internal space utilization of the battery pack can be significantly increased, and the energy density of the battery pack is improved; in addition, since the direct cooling integrated module is directly arranged in the battery pack, the independent operation of the battery pack can be realized, and the external liquid cooling mechanism is not needed, so that the problem that the heat management of the whole battery pack is invalid when the liquid cooling mechanism is invalid is avoided, and the normal work of the battery pack is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. 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 on the basis of these drawings.

[0048] Figure 1 is a structural schematic diagram of the battery pack provided by the embodiments of the present application;

[0049] Figure 2 is an exploded view of the battery pack provided by the embodiments of the present application;

[0050] Figure 3 is a sectional view of the direct cooling integrated module in the battery pack shown in Figure 1

[0051] Figure 4 is a sectional view of the battery pack provided by the embodiments of the present application;

[0052] Figure 5 is a partial enlarged view of A in Figure 4

[0053] Figure 6 is a partial enlarged view of B in Figure 2

[0054] Figure 7 is a sectional view of the BDU integrated module in the battery pack shown in Figure 1 Markings in the drawings:

[0055] 1, battery pack;

[0056]

[0057] ​​​​100, box body; 101, cooling medium chamber; 102, air duct; 103, air inlet; 104, air outlet; 105, dust screen; 106, lower box body; 1061, mounting cavity; 1062, opening; 1063, bottom plate; 1064, mounting groove; 107, cover body;

[0058] 200, battery cell;

[0059] 300, direct cooling integrated module; 301, condenser; 302, fan; 303, compressor; 304, shell;

[0060] 400, BDU integrated module;

[0061] 500, integrated busbar;

[0062] 600, heat shield. DETAILED DESCRIPTION

[0063] 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 of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0064] Referring to Figures 1-2 As shown in the drawings, the embodiments of the present application provide a battery pack 1, which comprises a box body 100, a plurality of battery cells 200 and a direct cooling integrated module 300. The box body 100 is provided with a cooling medium chamber 101 for accommodating a cooling liquid. The plurality of battery cells 200 are all mounted in the box body 100. The direct cooling integrated module 300 is arranged in the box body 100 and connected with the cooling medium chamber 101 to adjust the temperature of the cooling liquid.

[0065] The box body 100 plays a bearing role, and is used to support the battery cells 200 and the direct cooling integrated module 300, and plays a certain protection role for the two. The box body 100 can be made of metal, alloy or engineering plastic, so as to ensure that the box body 100 has good structural strength and long service life, and thus the strength of the battery pack 1 in the embodiments of the present application is high.

[0066] With the battery pack 1, the battery cell 200 is directly installed in the box body 100, the module link in the traditional battery pack 1 is cancelled, the internal space utilization rate of the battery pack 1 can be significantly increased, and the energy density of the battery pack 1 is improved; in addition, since the direct cooling integrated module 300 is directly arranged in the battery pack 1, the independent operation of the battery pack 1 can be realized, and the external liquid cooling mechanism does not need to be relied on, so that the problem that the heat management of all the battery packs 1 is invalid when the liquid cooling mechanism is invalid is avoided, and the normal work of the battery pack 1 is ensured.

[0067] In some embodiments, referring to Figure 3 As shown in the figure, 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 box body 100 are communicated to constitute a refrigerant circuit of a heat pump system, the refrigerant circuit is used for circulating flow of refrigerant between the compressor 303, the condenser 301 and the cooling medium chamber 101; wherein the box body 100 constitutes an evaporator in the heat pump system.

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

[0069] It can be understood that in the embodiment, the direct cooling integrated module 300 further includes an expansion valve, the expansion valve can throttle and depressurize the cooling liquid from the condenser into low-temperature and low-pressure liquid, and then send the cooling liquid into the evaporator.

[0070] In some embodiments, referring to Figure 4 and Figure 5 As shown in the figure, the box body 100 further includes a bottom plate 1063, the bottom plate 1063 is used for bearing the battery cell 200, and the bottom plate 1063 is provided with the cooling medium chamber 101.

[0071] The cooling medium chamber 101 is directly integrated in the bottom plate 1063, so that the cooling liquid can be closer to the battery cell 200, the heat generated by the battery cell 200 can be quickly conducted to the cooling liquid in the cooling medium chamber 101 through the bottom plate 1063, thereby realizing efficient heat exchange; at the same time, the cooling medium chamber 101 is integrated in the bottom plate 1063, the space occupied is reduced, the space layout inside the battery pack 1 is more compact, and the battery cell 200 can be more closely arranged in the mounting groove 1064. In addition, the cooling medium chamber 101 arranged on the bottom plate 1063 can ensure the contact area between the cooling medium chamber 101 and the battery cell 200, so as to realize a more efficient heat exchange process.

[0072] In summary, in the battery pack 1 of the present application, by directly integrating the cooling medium chamber 101 in the bottom plate 1063, efficient heat exchange is achieved, ensuring that the battery cells 200 operate within the optimal operating temperature range, and ensuring that the battery pack 1 can operate efficiently and stably under various working conditions.

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

[0074] In this way, it can be ensured that the cooling liquid cools all the battery cells 200 before flowing into the direct cooling integrated module 300, so that the cooling effect of the direct cooling integrated module 300 is better.

[0075] In some embodiments, referring to Figure 6 As shown in the figure, the direct cooling integrated module 300 further comprises a fan 302, which is arranged corresponding to the condenser 301 for driving gas to 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 to flow through the condenser 301, and can dynamically adjust the heat dissipation intensity according to the temperature demand of the battery pack 1, reducing the influence of the environment temperature. The synergistic effect of the two not only ensures that the battery pack 1 can maintain good heat dissipation effect under various working conditions, but also enhances the reliability of the battery pack 1, so that it can independently operate when the external liquid cooling mechanism fails, avoiding the overall 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 box 100.

[0078] This connection mode is convenient for maintenance and replacement of the fan 302. When the fan 302 fails or needs regular maintenance, maintenance personnel can quickly disassemble and repair or replace it, thereby reducing maintenance time and cost and improving the maintainability of the battery pack 1. In addition, detachable connection also improves the flexibility of the system, so that the fan 302 can be replaced or upgraded according to different application scenarios and needs, further improving the adaptability and service life of the battery pack 1.

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

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

[0081] In some embodiments, the direct cooling integrated module 300 further comprises 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 arranged in the air duct 102.

[0082] In the embodiments of the present application, by reasonably designing the shape and direction of the air duct 102, the air flow is ensured to flow uniformly through the condenser 301, so as to guide the air flow to take away the heat on the surface of the condenser 301 more effectively, avoid the heat accumulation in a local area, and further improve the performance of the entire cooling system. Moreover, the arrangement of the air duct 102 helps to reduce the interference of the air flow in the air duct 102, and the cooling effect of the condenser 301 is more stable and will not be affected by the instability of the external air flow, thereby improving the stability and reliability of the cooling system.

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

[0084] In some embodiments, the direct cooling integrated module 300 further comprises at least one sealing member, and the sealing member is arranged between the air inlet 103 and the housing 304.

[0085] In some embodiments, a sealing member is arranged between the air outlet 104 and the housing 304.

[0086] The sealing member can prevent external dust and impurities from entering the inside of the battery pack 1. By arranging the sealing member at the air inlet 103 and the air outlet 104, the dust, particulate matter and other impurities in the external environment can be blocked from entering between the battery cells 200, thereby keeping the battery cells 200 clean and prolonging the service life of the battery cells 200. Moreover, the sealing member can reduce the leakage of the air flow when entering and exiting the air duct 102, ensure that the air flow flows in the air duct 102 according to the designed path, avoid the reduction of the cooling efficiency caused by the air flow leakage, and the good sealing performance in the air duct 102 can also reduce the pressure loss of the air flow at the air inlet and outlet 104, and improve the working efficiency of the fan 302.

[0087] In summary, the arrangement of the sealing member not only effectively prevents the leakage of the cooling liquid and the entry of external impurities, but also maintains the stability of the air flow and the pressure balance in the air duct 102, and reduces the noise propagation, thereby improving the safety, reliability and cooling performance of the battery pack 1, and providing a strong guarantee for the efficient operation and service life of the battery pack 1.

[0088] In some embodiments, as shown in FIG. 2, the fan 302 has at least two, and at least part of the fans 302 are arranged along the length direction of the condenser 301. Figure 6

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

[0090] It can be understood that the design of the plurality of fans 302 also enhances the redundancy of the direct cooling integrated module 300, that is, even if one of the fans 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 failure of the fan 302.

[0091] The direct cooling integrated module 300 in the embodiment of the application can increase the gas flow through the condenser 301 by arranging a plurality of fans 302, thereby more effectively removing the heat on the surface of the condenser 301, ensuring that the temperature of the cooling liquid can be quickly reduced and kept stable, and thereby better meeting the heat dissipation demand of the battery pack 1 and reducing the probability of overheating of the battery cell 200 due to insufficient heat dissipation.

[0092] In some embodiments, referring to Figure 2 As shown in the figure, the box body 100 further comprises at least one dust screen 105, and the air inlet 103 is provided with the dust screen 105.

[0093] In some embodiments, the air outlet 104 is provided with the dust screen 105.

[0094] The entry of dust and impurities can cause the condenser 301 to be blocked, thereby causing the heat dissipation efficiency to decrease or even causing a failure. Therefore, the dust screen 105 can effectively block the entry of dust, particulate matter and other impurities from the outside into the battery pack 1, ensuring the long-term stable operation of the heat dissipation system; at the same time, the fan 302 operates in a clean environment, which can also reduce mechanical wear and failure caused by the entry of dust, thereby reducing the maintenance cost.

[0095] In addition, the dust screen 105 can also reduce the short circuit risk caused by the entry of dust, thereby protecting the electronic elements inside the battery pack 1 and improving the safety and reliability of the battery pack 1.

[0096] In some embodiments, referring to Figure 2 As shown in the figure, the battery pack 1 further comprises a BDU integrated module 400 arranged in the box body 100, and an integrated busbar 500, and the plurality of battery cells 200 are connected to the BDU integrated module 400 through the integrated busbar 500.

[0097] In the present embodiment, the BDU integrated module 400 is separately arranged inside the battery pack 1, and the battery cell 200 is connected with the BDU integrated module 400 through the integrated busbar 500, replacing the traditional complex wire harness and connecting piece, thereby reducing the problem of using multiple high-voltage wire harnesses for traditional battery pack 1 series connection, reducing the cost of wire harness, and also greatly reducing the battery pack 1 failure caused by wire harness connection.

[0098] It can be understood that in the present embodiment, the BDU integrated module 400 is a prior art for controlling high-voltage loop, overload and short-circuit protection, charge management, etc., specifically: safe on-off of high-voltage loop, connection or disconnection of the battery and external high-voltage system through the main relay, and rapid disconnection of the circuit in emergency (such as collision, short circuit or system failure) to prevent the risk of electric shock or thermal runaway; at the same time, the BDU also has overcurrent and short-circuit protection function, which cuts off the circuit when abnormal current through the fuse or fast fuse device, protecting the battery and high-voltage components. In addition, the BDU is responsible for pre-charge management, which gradually charges the high-voltage capacitor through the pre-charge loop (pre-charge relay and resistor) when power on, avoiding the damage of instantaneous large current impact on the equipment.

[0099] In some embodiments, referring to FIGS. 1-3, the direct cooling integrated module 300 is arranged in the battery pack 1, and the direct cooling integrated module 300 is arranged in the battery pack 1. Figure 4 Figure 7 As shown in FIGS. 1-3, the outer periphery of the direct cooling integrated module 300 is wrapped with a heat shield 600 for separating the direct cooling integrated module 300 and the battery cell 200. The direct cooling integrated module 300 may generate heat during operation, and the temperature of the battery cell 200 needs to be strictly controlled to ensure its performance and service life. The arrangement of the heat shield 600 can effectively insulate the heat transfer between the direct cooling integrated module 300 and the battery cell 200, prevent the heat of the direct cooling integrated module 300 from being transferred to the battery cell 200, avoid the performance of the battery cell 200 being affected by local overheating, thereby improving the thermal management efficiency of the entire battery pack 1 and ensuring the battery cell 200 to work in the best 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, so that the heat dissipation system of the direct cooling integrated module 300 can 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, in the battery pack 1 of the present application, the design of wrapping the direct cooling integrated module 300 with the heat shield 600 significantly improves the thermal management efficiency and safety of the system. The heat shield 600 can effectively insulate the heat transfer between the direct cooling integrated module 300 and the battery cell 200, prevent the performance of the battery cell 200 from being affected by local overheating, and at the same time protect the battery cell 200 from transient thermal shock and prolong its service life.

[0102] ​In some embodiments, the outer periphery of the BDU integration module 400 is wrapped with a heat shield 600 for isolating the BDU integration module 400 from the battery cell 200.

[0103] Similarly, the BDU integration 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 service life. The heat shield 600 can effectively isolate the heat transfer between the BDU integration module 400 and the battery cell 200, prevent the heat of the BDU integration module 400 from being transferred to the battery cell 200, avoid the performance of the battery cell 200 being affected by local overheating, and thus improve the thermal management efficiency of the entire battery pack 1 and ensure that the battery cell 200 works within an optimal temperature range.

[0104] In some embodiments, the box 100 comprises a lower box 106, the box 100 is provided with a mounting cavity 1061 and an opening 1062 communicating with the mounting cavity 1061, the lower box 106 comprises a bottom plate 1063 facing the opening 1062, the side of the bottom plate 1063 close to the battery cell 200 is provided with a plurality of mounting grooves 1064, and the bottom surface of the battery cell 200 is bonded to the mounting grooves 1064; and a cover 107 connected with the lower box 106 to close the opening 1062.

[0105] The bottom surface of the battery cell 200 is bonded to the mounting grooves 1064, and this fixing mode can ensure that the battery cell 200 is firmly positioned in the mounting grooves 1064 and reduce vibration and displacement of the battery cell 200 during operation. The design of the mounting grooves 1064 enables the battery cell 200 to be closely arranged on the bottom plate 1063 of the lower box 106 and fully utilize the space of the mounting cavity 1061.

[0106] In summary, in the battery pack 1 of the present application, the design of the lower box 106 and the cover 107 significantly improves the installation stability of the battery cell 200, the battery cell 200 is firmly positioned by the mounting grooves 1064 and the bonding mode, vibration and displacement are reduced, the space utilization inside the battery pack 1 is optimized, and the energy density is improved.

[0107] In a second aspect, the embodiments of the present application also provide a power consuming device comprising the above-mentioned battery pack 1.

[0108] The power consuming device has all the beneficial effects of the above-mentioned battery pack 1.

[0109] With the power utilization equipment, the battery cell 200 is directly installed in the box body 100, the module link in the traditional battery pack 1 is cancelled, the internal space utilization rate of the battery pack 1 can be significantly increased, and the energy density of the battery pack 1 is improved; in addition, since the direct cooling integrated module 300 is directly arranged in the battery pack 1, independent operation of the battery pack 1 can be realized, and the external liquid cooling mechanism does not need to be relied on, so that the problem that the heat management of all the battery packs 1 is invalid when the liquid cooling mechanism is invalid is avoided, and the normal work of the battery pack 1 is ensured.

[0110] The above has carried out the detailed introduction to the embodiment of the application, the principle and the implementation mode of the application have been described in this paper by applying specific examples, the above embodiment is only used for helping understanding the method and the core thought of the application; simultaneously, for the person skilled in the art, according to the idea of the application, there will be changes in specific implementation mode and application range, and the above is not understood as the limitation of the application.

Claims

1. A battery pack, characterized in that, 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 according to claim 1, characterized in that, 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 according to claim 2, characterized in that, 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 according to claim 3, characterized in that, The direct cooling integrated module (300) is located at the corner of the base plate (1063).

5. The battery pack according to any one of claims 2-4, characterized in that, 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 according to claim 5, characterized in that, The fan (302) is detachably connected to the housing (100).

7. The battery pack according to claim 5, characterized in that, 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 according to claim 7, characterized in that, 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 according to claim 8, characterized in that, 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 according to any one of claims 6-9, characterized in that, 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 according to claim 7, characterized in that, 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 according to claim 1, characterized in that, 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 according to claim 12, characterized in that, 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 appliance, characterized in that, Includes the battery pack (1) as described in any one of claims 1-13.

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