Battery pack and electric device using the same

Abstract

The utility model relates to the technical field of battery, disclose a kind of battery pack and its electric equipment, including box, with first cavity, box is equipped with first support plate and second support plate, first support plate and second support plate are along first direction interval arrangement, and first cavity is divided into electrical cavity, heat exchange cavity and exhaust cavity, first support plate has a plurality of first through-hole being communicated with electrical cavity, second support plate has second through-hole;Battery, be equipped with multiple, battery includes shell and pole, shell is located in heat exchange cavity, pole is threaded first through-hole and at least partially located in electrical cavity, shell is equipped with explosion-proof valve, explosion-proof valve is set up with second through-hole corresponding;Supporting strip, have multiple, multiple supporting strip is connected between any adjacent shell, and multiple supporting strip is relatively arranged along first direction, and multiple supporting strip and adjacent shell form cooling flow channel by enclosing.Battery pack and its electric equipment of the utility model, improve cooling effect, improve the use safety of immersed battery.

Description

Technical Field

[0001] This utility model relates to the technical field of batteries, and in particular to a battery pack and its electrical equipment. Background Technology

[0002] Existing liquid-cooled batteries mainly use bottom-side cold plates for cooling and large-area cold plates for cooling. The coolant is completely separated from the battery by the cooling plates. There are also thermally conductive adhesives and cold plates between the battery and the coolant. The heat conduction path is long, the structure is complex, and the cooling effect is not good. In addition, the cooling circuit is relatively closed and the temperature is uneven with a large temperature difference. It is difficult to meet the high requirements of supercharging for cooling effect and thermal safety, as well as the high requirements of long life for temperature uniformity.

[0003] Most immersion cooling solutions on the market use insulating coolant, which completely submerges the battery in the coolant. The coolant is expensive, and the submerged battery poses certain safety hazards. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. It provides a battery pack and its electrical equipment, which improves cooling efficiency and enhances the safety of submerged batteries.

[0005] To achieve the above objectives, this utility model provides a battery pack having a first direction, a second direction, and a third direction intersecting in pairs, a housing having a first cavity, the housing having a first support plate and a second support plate located within the first cavity, the first support plate and the second support plate being spaced apart along the first direction, and dividing the first cavity into an electrical cavity, a heat exchange cavity, and an exhaust cavity, the first support plate having a plurality of first through holes communicating with the electrical cavity, and the second support plate having a plurality of second through holes communicating with the exhaust cavity; The battery is provided in multiple forms. Each battery includes a housing and an electrode post connected to one end of the housing in the first direction. The housing is located in the heat exchange chamber. The electrode post passes through the first through hole and is at least partially located in the electrical cavity. An explosion-proof valve is provided on the side of the housing facing the second support plate. The explosion-proof valve is correspondingly arranged with the second through hole. The support bar is provided in multiples, which are connected between any adjacent housings and are arranged opposite each other along the first direction. The multiple support bars and the adjacent housings enclose each other to form a cooling channel.

[0006] As a preferred embodiment, the battery pack further has a second direction that is perpendicular to both the first direction and the third direction. The support bars extend along the second direction and are spaced apart at both ends of the housing along the first direction. The support bars at both ends of adjacent housings enclose each other to form a cooling channel.

[0007] As a preferred embodiment, the housing includes a first side surface arranged opposite to each other along the second direction and a second side surface arranged opposite to each other along the third direction. The first side surface is connected to the second side surface at both ends of the third direction. The area of ​​the second side surface is larger than that of the first side surface. Along the third direction, the second side surface of the adjacent housing and the support strip arranged opposite to each other along the first direction enclose each other to form the cooling channel extending along the second direction.

[0008] As a preferred embodiment, the housing is provided with a first guide plate and a second guide plate arranged opposite to each other in the second direction. The first guide plate and the second guide plate are respectively located in the heat exchange chamber. The first guide plate and the battery are spaced apart on one side along the second direction to form a first confluence channel extending along the third direction. The second guide plate and the battery are spaced apart on the other side along the second direction to form a second confluence channel extending along the third direction. The housing is provided with a liquid inlet and a liquid outlet. The liquid inlet is connected to the first confluence channel, the liquid outlet is connected to the second confluence channel, and the cooling channel is connected to the first confluence channel and the second confluence channel.

[0009] As a preferred embodiment, the first guide plate is connected to one end of the housing in the second direction. The first guide plate is provided with a first guide surface extending along the third direction. The first guide surface is located on the side of the first guide plate facing the battery. In the third direction, the distance between the first guide surface and the battery in the second direction decreases from the end closer to the liquid inlet to the end farther away from the liquid inlet.

[0010] As a preferred embodiment, the second guide plate is provided with a second guide surface. The second guide plate is connected to the other end of the housing in the second direction. The second guide surface is located on the side of the second guide plate facing the battery. In the third direction, the distance between the second guide surface and the battery in the second direction increases from the end away from the liquid outlet to the end closer to the liquid outlet, so that the cross-sectional area of ​​the second confluence channel gradually increases along the direction of coolant flow towards the liquid outlet.

[0011] As a preferred embodiment, the liquid inlet is located at one end of the housing in the third direction, and the liquid inlet is connected to the first manifold; the liquid outlet is located at the other end of the housing in the third direction, and the liquid outlet is connected to the second manifold.

[0012] As a preferred embodiment, the housing includes a frame, a first panel, and a second panel. The battery is located within the frame. One end of the frame is connected to the first panel in the first direction, and the other end is connected to the second panel. The frame, the first panel, and the second panel together enclose the first cavity. A first support plate and a second support plate are located between the first panel and the second panel along the first direction. The edges of the first support plate and the second support plate are respectively sealed to the frame. The first panel, the frame, and the first support plate enclose the electrical cavity. The first support plate, the frame, and the second support plate enclose the heat exchange cavity. The second support plate, the frame, and the second panel enclose the exhaust cavity.

[0013] As a preferred embodiment, the first support plate is sealed to the frame, and the end of the housing facing the first support plate in the first direction is sealed to the first support plate, and / or... The second support plate is sealed to the frame, and the end of the housing facing the second support plate in the first direction is sealed to the second support plate.

[0014] An electrical device includes the aforementioned battery pack.

[0015] Compared with existing technologies, the battery pack and its electrical equipment according to this utility model embodiment have the following advantages: The housing has a first cavity, within which a first support plate and a second support plate spaced apart along a first direction are provided. The first and second support plates divide the first cavity into an electrical cavity, a heat exchange cavity, and an exhaust cavity in the first direction. The electrical cavity houses the battery terminals and centrally houses high-voltage components. The first support plate has multiple first through holes communicating with the electrical cavity. The terminals penetrate the first through holes and are at least partially located within the electrical cavity, ensuring that the electrical connection portion is located in a dry electrical cavity and does not contact the coolant in the heat exchange cavity, thus eliminating the risk of short circuits. The exhaust cavity is used for high-temperature gases released during thermal runaway. The second support plate has multiple second through holes communicating with the exhaust cavity. The battery's explosion-proof valve is correspondingly arranged with the second through holes. When the battery experiences thermal runaway, the explosion-proof valve opens, and the gas is discharged into the independent exhaust cavity through the second through holes, preventing gas accumulation in the heat exchange cavity or electrical cavity and reducing the risk of explosion. The heat exchange cavity houses the battery and coolant. The separation of the first cavity by the first and second support plates achieves three-phase separation of electricity, liquid, and gas through physical isolation, improving electrical safety and thermal runaway response capabilities. The battery casing is located within the heat exchange cavity, allowing the coolant to directly contact the casing and enhance heat exchange efficiency. Multiple support bars connect any adjacent casings and are arranged opposite each other along a first direction. These bars enclose and space adjacent casings to form cooling channels. The coolant flows through these channels, filling the gaps between adjacent casings to create physical and thermal isolation. In the event of thermal runaway, the coolant rapidly absorbs and carries away heat, delaying temperature transfer to neighboring batteries and suppressing heat diffusion. Because the terminals are located within the electrical cavity and isolated from the heat exchange cavity, ordinary coolant can be used. Ordinary coolant is less expensive than insulating coolant, enabling immersion cooling and structurally ensuring cooling performance and thermal safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the component disassembly structure of an embodiment of this utility model.

[0018] Figure 3 This is a top view of the internal structure of an embodiment of this utility model.

[0019] Figure 4 This is an embodiment of the present utility model. Figure 3 A cross-sectional view of point AA in the diagram.

[0020] Figure 5 This is an embodiment of the present utility model. Figure 4 A magnified structural diagram of point B in the diagram.

[0021] Figure 6 This is a cross-sectional three-dimensional structural diagram of the internal structure of this utility model.

[0022] Figure 7 This is a utility model Figure 6 A magnified structural diagram at point C.

[0023] Figure 8 This is a three-dimensional structural diagram of the internal structure of this utility model.

[0024] Figure 9 This is a schematic diagram of the component disassembly structure of the battery pack of this utility model.

[0025] Figure 10 This is a utility model Figure 9 A magnified structural diagram of point D in the diagram.

[0026] In the picture: X, first direction; Y, second direction; Z, third direction; 1. Housing; 11. Frame; 111. First cavity; 1111. Electrical cavity; 1112. Heat exchange cavity; 1113. Exhaust cavity; 112. Liquid inlet; 113. Liquid outlet; 14. Cooling channel; 12. First panel; 13. Second panel; 16. First guide plate; 161. First guide surface; 162. First confluence channel; 17. Second guide plate; 171. Second guide surface; 172. Second confluence channel; 2. Battery; 21. Housing; 211. First side; 212. Second side; 22. Terminal; 23. Explosion-proof valve; 3. Busbar components; 4. First support plate; 41. First through hole; 5. Second support plate; 51. Second through hole; 7. Support strip. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the embodiments of the application, "parallel" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is -1° to 1°. "Perpendicular" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is 89° to 91°. Equal distances, equal angles, or equal areas refer to a state in which the tolerance range is -1% to 1%.

[0032] like Figures 1 to 3 as well as Figure 10As shown, a preferred embodiment of the present invention provides a battery pack. The battery pack has a vertical first direction X and a third direction Z. The housing 1 has a first cavity 111. The housing 1 is provided with a first support plate 4 and a second support plate 5 located in the first cavity 111. The first support plate 4 and the second support plate 5 are spaced apart along the first direction X and divide the first cavity 111 into an electrical cavity 1111, a heat exchange cavity 1112 and an exhaust cavity 1113. The first support plate 4 has a plurality of first through holes 41 communicating with the electrical cavity 1111, and the second support plate 5 has a plurality of second through holes 51 communicating with the exhaust cavity 1113. Battery 2, provided in multiple forms, includes housing 21 and electrode post 22 connected to one end of housing 21 in the first direction X. Housing 21 is located in heat exchange chamber 1112. Electrode post 22 passes through first through hole 41 and is at least partially located in electrical chamber 1111. Explosion-proof valve 23 is provided on the side of housing 21 facing the second support plate 5. Explosion-proof valve 23 is correspondingly provided with the second through hole 51. The support bar 7 is multiple, and the multiple support bars 7 are connected between any adjacent housings 21. The multiple support bars 7 are arranged opposite each other along the first direction X, and the multiple support bars 7 and the adjacent housings 21 enclose each other to form a cooling channel 14.

[0033] An electrical appliance, such as Figures 1 to 10 As shown, it includes a battery pack.

[0034] The battery pack and its electrical equipment of this utility model include a housing 1 with a first cavity 111. Within the first cavity 111, a first support plate 4 and a second support plate 5 are spaced apart along a first direction X. The first support plate 4 and the second support plate 5 divide the first cavity 111 along the first direction X into an electrical cavity 1111, a heat exchange cavity 1112, and an exhaust cavity 1113. The electrical cavity 1111 is used to house the battery terminals 22 and centrally arranges the CCS (integrated busbar) assembly. The first support plate 4 has multiple first through holes 41 communicating with the electrical cavity 1111. The terminals 22 penetrate the first through holes 41 and are at least partially located within the electrical cavity 1111, ensuring that the electrical connection portion is located within the dry electrical cavity 1111 and does not contact the coolant in the heat exchange cavity 1112, thus eliminating the risk of short circuits. The exhaust cavity 1113 is used to handle the high-temperature gas released during thermal runaway of the mobile phone. The second support plate 5 has multiple second through holes 51 communicating with the exhaust chamber 1113. The battery's explosion-proof valve 23 is correspondingly arranged with the second through holes 51. When the battery experiences thermal runaway, the explosion-proof valve 23 opens, and the gas is discharged into the independent exhaust chamber 1113 through the second through holes 51, preventing gas from accumulating in the heat exchange chamber 1112 or the electrical chamber 1111 and reducing the risk of explosion. The heat exchange chamber 1112 is used to house the battery and coolant. The separation of the first cavity 111 by the first support plate 4 and the second support plate 5 achieves three-phase separation of electricity, liquid, and gas through physical isolation, improving electrical safety and thermal runaway response capabilities. The battery casing 21 is located inside the heat exchange chamber 1112, allowing the coolant to directly contact the battery casing 21, improving heat exchange efficiency. Multiple support bars 7 are connected between any adjacent housings 21, and the multiple support bars 7 are arranged opposite each other along the first direction X. The multiple support bars 7 enclose and space adjacent housings 21 to form a cooling channel 14. The coolant flows in the cooling channel 14 and fills the gap between adjacent housings 21, forming physical and thermal isolation. When the battery 2 experiences thermal runaway, the coolant quickly absorbs and carries away heat, delaying the transfer of temperature to adjacent batteries 2 and effectively suppressing heat diffusion. Since the terminal post 22 is located in the electrical cavity 1111 and isolated from the heat exchange cavity 1112, ordinary coolant can be used. Ordinary coolant is less expensive than insulating coolant, achieving immersion cooling and structurally ensuring cooling performance and thermal safety.

[0035] As one embodiment, such as Figure 5As shown, the first support plate 4 has a dimension of c mm in the first direction X, satisfying: 0.5 ≤ c ≤ 3. The second support plate 5 has a dimension of d mm in the first direction X, satisfying: 0.5 ≤ d ≤ 3. This arrangement achieves lightweight and compact design while ensuring structural strength and sealing reliability. On the one hand, the thickness of the first support plate 4 or the second support plate 5 is not less than 0.5 mm, ensuring the stability of the sealed connection with the frame 11 and the shell 21; on the other hand, the thickness of the first support plate 4 or the second support plate 5 does not exceed 3 mm, avoiding excessive occupation of the space in the first direction X, and providing sufficient margin for the functional layout of the electrical cavity 1111 and the heat exchange cavity 1112.

[0036] As one embodiment, such as Figure 5 As shown, the dimension of the cooling channel 14 in the third direction Z is e mm, satisfying: 1 ≤ e ≤ 10. When e is not ≥ 1 mm, the cooling channel 14 is prevented from being blocked by small particles, ensuring the reliability of system operation; when e ≤ 10 mm, the coolant flow rate is maintained within a reasonable range, ensuring both convective heat transfer effect and avoiding insufficient heat transfer area or uneven flow distribution due to excessive width of the cooling channel 14. Within this range, the pressure drop of the cooling channel 14 is moderate, improving the overall vehicle energy efficiency.

[0037] As one embodiment, such as Figures 4 to 7 As shown, one end of the battery 2 in the first direction X is bonded to the first support plate 4, and the other end is bonded to the second support plate 5. This fixes the battery 2 within the heat exchange chamber 1112, preventing displacement under vehicle vibration or impact conditions and improving structural reliability. The adhesive layer fills the gaps between the end face of the battery 2 in the first direction X and the first support plate 4 and the second support plate 5, further enhancing the sealing integrity of the heat exchange chamber 1112 and preventing coolant leakage or thermal runaway gas from flowing into the electrical cavity 1111.

[0038] As one embodiment, such as Figure 5 As shown, the battery pack also includes a busbar component 3, which is located in the electrical cavity 1111, and multiple terminals 22 are connected to the busbar component 3. Integrating the high-current busbar function into a separate and dry electrical cavity 1111, and physically and fluidly isolating it from the heat exchange cavity 1112 containing coolant via a first support plate 4, avoids the risk of short circuits, arcing, or corrosion caused by coolant leakage, and improves the safety and reliability of the high-voltage system.

[0039] As one embodiment, such as Figures 3 to 5As shown, the support bar 7 is located inside the heat exchange cavity 1112. The support bar 7 can extend along the second direction Y or the third direction Z. In the first direction X, the support bar 7 near the first support plate 4 is connected to or abuts against the first support plate 4, and the support bar 7 near the second support plate 5 is connected to or abuts against the second support plate 5. The support bar 7, together with the first support plate 4 and the second support plate 5, constitutes the internal skeleton structure of the heat exchange cavity 1112. On the one hand, the support bar 7 serves as the lateral boundary of the cooling flow channel 14, forming a closed flow channel in cooperation with the first support plate 4 and the second support plate 5. On the other hand, the support bar 7 serves as a structural reinforcement, connecting the first support plate 4 and the second support plate 5 into one unit, thereby improving the overall rigidity and vibration resistance of the battery pack.

[0040] Furthermore, such as Figures 5 to 7 As shown, the battery pack also has a second direction Y that is perpendicular to both the first direction X and the third direction Z. Support bars 7 extend along the second direction Y and are spaced apart at both ends of the housing 21 along the first direction X. The support bars 7 at both ends of the adjacent housings 21 enclose a cooling channel 14, allowing the coolant to flow stably along the second direction Y in the gap between the batteries 2, i.e., the cooling channel 14, thereby improving cooling uniformity and heat exchange efficiency. At the same time, the support bars 7 connect to both ends of the housing 21 in the first direction X, allowing multiple adjacent batteries 2 to be connected to form a battery pack, enhancing the overall rigidity and vibration resistance of the battery pack, and improving the mechanical reliability of the battery pack.

[0041] Furthermore, such as Figures 9 to 10 As shown, the housing 21 includes a first side surface 211 arranged opposite to each other along the second direction Y and a second side surface 212 arranged opposite to each other along the third direction Z. The first side surface 211 is connected to the second side surface 212 at both ends of the third direction Z. The area of ​​the second side surface 212 is larger than that of the first side surface 211. The second side surface 212 of the housing 21 adjacent to each other in the third direction Z is surrounded by support bars 7 arranged opposite to each other along the first direction X to form a cooling channel 14 extending along the second direction Y. This allows the coolant to flow along the second direction Y in the cooling channel 14 between the large surfaces of the battery 2, making full use of the large surface area for heat exchange, thereby improving heat dissipation capacity and temperature uniformity. At the same time, the support bars 7 are set at both ends of the battery 2 in the first direction X, forming an upper and lower clamping structure for the battery 2, effectively suppressing the expansion and deformation of the battery 2 during charge and discharge cycles, and enhancing the overall structural stability of the module.

[0042] Furthermore, such as Figure 3 and Figure 8As shown, the housing 1 is provided with a first guide plate 16 and a second guide plate 17 arranged opposite to each other in the second direction Y. The first guide plate 16 and the second guide plate 17 are respectively located in the heat exchange chamber 1112. The first guide plate 16 and the battery 2 are spaced apart on one side of the second direction Y to form a first confluence channel 162 extending in the third direction Z. The second guide plate 17 and the battery 2 are spaced apart on the other side of the second direction Y to form a second confluence channel 172 extending in the third direction Z. The housing 1 is provided with a liquid inlet 112 and a liquid outlet 113. The liquid inlet 112 is connected to the first confluence channel 162, and the liquid outlet 113 is connected to the second confluence channel 172. The cooling channel 14 is connected to the first confluence channel 162 and the second confluence channel 172. The heat exchange chamber 1112 of the housing 1 is equipped with a first guide plate 16 and a second guide plate 17 arranged opposite each other in the second direction Y. The first guide plate 16 and the second guide plate 17 form a first confluence channel 162 and a second confluence channel 172 extending in the third direction Z with the two ends of the battery pack in the second direction Y, respectively. The liquid inlet 112 is connected to the first confluence channel 162, and the liquid outlet 113 is connected to the second confluence channel 172. The cooling channels 14 are connected to the first confluence channel 162 and the second confluence channel 172 at both ends of the second direction Y, respectively. This realizes an efficient cooling path in which the coolant flows from the liquid inlet 112 into the first confluence channel 162, flows in parallel through the cooling channels 14 between each battery 2, and flows from the cooling channels 14 into the second confluence channel 172 for unified discharge. The coolant is distributed to each cooling channel 14 through the first confluence channel 162, improving the flow uniformity of each cooling channel 14 and improving the temperature uniformity and thermal management performance of the battery pack.

[0043] As one embodiment, such as Figure 3 and Figure 8 As shown, the first guide plate 16 and the second guide plate 17 are connected to the first support plate 4 and the second support plate 5 at their respective ends in the first direction X. The first guide plate 16 and the second guide plate 17 also serve as end support structures, enhancing the overall rigidity and vibration resistance of the module.

[0044] Furthermore, such as Figure 3 and Figure 8As shown, the first guide plate 16 is connected to one end of the housing 1 in the second direction Y. The first guide plate 16 has a first guide surface 161 extending in the third direction Z. The first guide surface 161 is located on the side of the first guide plate 16 facing the battery 2. In the third direction Z, the distance between the first guide surface 161 and the battery 2 in the second direction Y decreases from the end closer to the inlet 112 to the end farther away from the inlet 112. This causes the cross-sectional area of ​​the first manifold 162 to gradually decrease along the coolant flow direction, which can adjust the pressure distribution in the first manifold 162 and promote a more uniform distribution of coolant to each cooling channel 14 in the third direction Z. This avoids the problem of uneven flow caused by differences in flow paths and improves the temperature consistency of multiple batteries 2. For batteries 2 far from the inlet 112, they can still obtain sufficient coolant supply, thereby enhancing the overall heat dissipation performance and meeting the thermal management requirements of high-power charging and discharging. The structure is simple, requiring no additional control components, which helps to reduce system complexity and manufacturing costs, while improving the reliability and energy efficiency of the cooling system.

[0045] Furthermore, such as Figure 3 and Figure 8 As shown, the second guide plate 17 is provided with a second guide surface 171. The second guide plate 17 is connected to the other end of the housing 1 in the second direction Y. The second guide surface 171 is located on the side of the second guide plate 17 facing the battery 2. In the third direction Z, the distance between the second guide surface 171 and the battery 2 in the second direction Y increases from the end away from the outlet 113 to the end closer to the outlet 113. This makes the cross-sectional area of ​​the second confluence channel 172 gradually increase along the direction of the coolant flow towards the outlet 113. This can provide a gradually expanding flow space during the coolant collection process, making the discharge flow more uniform and improving the flow stability of the system under high flow or dynamic conditions.

[0046] Furthermore, the liquid inlet 112 is located at one end of the housing 1 in the third direction Z, and the liquid inlet 112 is connected to the first manifold 162; the liquid outlet 113 is located at the other end of the housing 1 in the third direction Z, and the liquid outlet 113 is connected to the second manifold 172, so that the coolant enters from one end of the housing 1 in the third direction Z, flows through each cooling channel 14 in the second direction Y, and is discharged from the other end in the third direction Z, which extends the heat exchange path of the coolant, improves the uniformity of the flow distribution of each cooling channel 14, and thus enhances the temperature consistency and thermal management efficiency of the battery pack.

[0047] Furthermore, such as Figure 2As shown, the housing 1 includes a frame 11, a first panel 12, and a second panel 13. The battery 2 is located inside the frame 11. One end of the frame 11 is connected to the first panel 12 in the first direction X, and the other end is connected to the second panel 13. The frame 11, the first panel 12, and the second panel 13 together enclose a first cavity 111. A first support plate 4 and a second support plate 5 are located between the first panel 12 and the second panel 13 in the first direction X. The edges of the first support plate 4 and the second support plate 5 are respectively sealed to the frame 11. The first panel 12, the frame 11, and the first support plate 4 enclose an electrical cavity 1111. The first support plate 4, the frame 11, and the second support plate 5 enclose a heat exchange cavity 1112. The second support plate 5, the frame 11, and the second panel 13 enclose an exhaust cavity 1113, thereby dividing the first cavity 111 into an electrical cavity 1111, a heat exchange cavity 1112, and an exhaust cavity 1113 arranged sequentially from top to bottom, realizing the functional isolation of the electrical system, the thermal management system, and the thermal runaway exhaust system. The electrical cavity 1111 is located at the top to prevent coolant intrusion and ensure high-pressure safety. The heat exchange cavity 1112 is located between the electrical cavity 1111 and the exhaust cavity 1113, providing a closed and efficient cooling environment for the battery pack. The exhaust cavity 1113 is located at the bottom and is used to collect and drain the high-temperature gas generated by thermal runaway, preventing it from spreading to the electrical area or the passenger compartment, thus improving the thermal safety and electrical reliability of the battery pack. At the same time, the internal reinforcing structure formed by the support plate and the frame 11 enhances the overall rigidity and impact resistance of the housing 1.

[0048] Furthermore, such as Figure 2 , Figure 5 as well as Figure 7 As shown, the first support plate 4 is sealed to the frame 11, and the end of the housing 21 facing the first support plate 4 in the first direction X is sealed to the first support plate 4, ensuring isolation between the electrical cavity 1111 and the heat exchange cavity 1112, preventing coolant leakage into the electrical cavity 1111 and causing a short circuit, and improving the electrical and thermal safety performance of the battery system. And / or, The second support plate 5 is sealed to the frame 11, and the end of the housing 21 facing the second support plate 5 in the first direction X is sealed to the second support plate 5, which ensures the isolation between the heat exchange chamber 1112 and the exhaust chamber 1113, prevents thermal runaway gas from entering the heat exchange chamber 1112, and improves the electrical and thermal safety performance of the battery system.

[0049] The sealed connection between the housing 21 and the first support plate 4, and / or the sealed connection between the housing 21 and the second support plate 5, provides structural constraints, suppresses the displacement of the battery 2, and improves structural stability.

[0050] In summary, this utility model embodiment provides a battery pack and its electrical equipment. The housing 1 has a first cavity 111, within which a first support plate 4 and a second support plate 5 are spaced apart along a first direction X. The first support plate 4 and the second support plate 5 divide the first cavity 111 along the first direction X into an electrical cavity 1111, a heat exchange cavity 1112, and an exhaust cavity 1113. The electrical cavity 1111 is used to accommodate the battery terminals 22 and centrally arrange the CCS assembly (integrated busbar). The first support plate 4 has multiple first through holes 41 communicating with the electrical cavity 1111. The terminals 22 pass through the first through holes 41 and are at least partially located in the electrical cavity 1111, ensuring that the electrical connection part is located in the dry electrical cavity 1111 and does not come into contact with the coolant in the heat exchange cavity 1112, thus eliminating the risk of short circuit. The exhaust cavity 1113 is used for high-temperature gases released in the event of thermal runaway. The second support plate 5 has multiple second through holes 51 communicating with the exhaust chamber 1113. The explosion-proof valve 23 of the battery 2 is correspondingly arranged with the second through holes 51. When the battery 2 experiences thermal runaway, the explosion-proof valve 23 opens, and the gas is discharged into the independent exhaust chamber 1113 through the second through holes 51, preventing gas from accumulating in the heat exchange chamber 1112 or the electrical chamber 1111 and reducing the risk of explosion. The heat exchange chamber 1112 is used to accommodate the battery 2 and the coolant. The separation of the first chamber 111 by the first support plate 4 and the second support plate 5 achieves three-phase separation of electricity, liquid, and gas through physical isolation, improving electrical safety and thermal runaway response capabilities. The casing 21 of the battery 2 is located inside the heat exchange chamber 1112, allowing the coolant to directly contact the casing 21 of the battery 2, improving heat exchange efficiency. Multiple support bars 7 are connected between any adjacent housings 21, and the multiple support bars 7 are arranged opposite each other along the first direction X. The multiple support bars 7 enclose and space adjacent housings 21 to form a cooling channel 14. The coolant flows in the cooling channel 14 and fills the gap between adjacent housings 21, forming physical and thermal isolation. When the battery 2 experiences thermal runaway, the coolant quickly absorbs and carries away heat, delaying the transfer of temperature to adjacent batteries 2 and effectively suppressing heat diffusion. Since the terminal post 22 is located in the electrical cavity 1111 and isolated from the heat exchange cavity 1112, ordinary coolant can be used. Ordinary coolant is less expensive than insulating coolant, achieving immersion cooling and structurally ensuring cooling performance and thermal safety.

[0051] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A battery pack having a vertical first direction (X) and a third direction (Z), characterized in that: The housing (1) has a first cavity (111). The housing (1) is provided with a first support plate (4) and a second support plate (5) located in the first cavity (111). The first support plate (4) and the second support plate (5) are spaced apart along the first direction (X) and divide the first cavity (111) into an electrical cavity (1111), a heat exchange cavity (1112) and an exhaust cavity (1113). The first support plate (4) has a plurality of first through holes (41) communicating with the electrical cavity (1111), and the second support plate (5) has a plurality of second through holes (51) communicating with the exhaust cavity (1113). A battery (2) is provided in multiple units. Each battery (2) includes a housing (21) and an electrode post (22) connected to one end of the housing (21) in the first direction (X). The housing (21) is located in the heat exchange chamber (1112). The electrode post (22) passes through the first through hole (41) and is at least partially located in the electrical chamber (1111). An explosion-proof valve (23) is provided on the side of the housing (21) facing the second support plate (5). The explosion-proof valve (23) is correspondingly arranged with the second through hole (51). The support bar (7) is multiple, and the multiple support bars (7) are connected between any adjacent housings (21), and the multiple support bars (7) are arranged opposite each other along the first direction (X), and the multiple support bars (7) and the adjacent housings (21) enclose to form a cooling channel (14).

2. The battery pack according to claim 1, characterized in that: The battery pack also has a second direction (Y) that is perpendicular to both the first direction (X) and the third direction (Z). The support strip (7) extends along the second direction (Y) and is spaced at both ends of the housing (21) along the first direction (X). The support strip (7) at both ends of the adjacent housings (21) encloses the support strip (7) at the first direction (X) to form a cooling channel (14).

3. The battery pack according to claim 2, characterized in that: The housing (21) includes a first side (211) arranged opposite to each other along the second direction (Y) and a second side (212) arranged opposite to each other along the third direction (Z). The first side (211) is connected to the second side (212) at both ends of the third direction (Z). The area of ​​the second side (212) is larger than that of the first side (211). Along the third direction (Z), the second side (212) of the adjacent housing (21) and the support bar (7) arranged opposite to each other along the first direction (X) enclose each other to form the cooling channel (14) extending along the second direction (Y).

4. The battery pack according to claim 3, characterized in that: The housing (1) is provided with a first guide plate (16) and a second guide plate (17) arranged opposite to each other in the second direction (Y). The first guide plate (16) and the second guide plate (17) are located in the heat exchange chamber (1112). The first guide plate (16) is spaced apart from the battery (2) on one side of the second direction (Y) to form a first confluence channel (162) extending in the third direction (Z). The second guide plate (17) is spaced apart from the battery (2) on the other side of the second direction (Y) to form a second confluence channel (172) extending in the third direction (Z). The housing (1) is provided with a liquid inlet (112) and a liquid outlet (113). The liquid inlet (112) is connected to the first confluence channel (162), and the liquid outlet (113) is connected to the second confluence channel (172). The cooling channel (14) is connected to the first confluence channel (162) and the second confluence channel (172).

5. The battery pack according to claim 4, characterized in that: The first guide plate (16) is connected to one end of the housing (1) in the second direction (Y). The first guide plate (16) is provided with a first guide surface (161) extending along the third direction (Z). The first guide surface (161) is provided on the side of the first guide plate (16) facing the battery (2). In the third direction (Z), the distance between the first guide surface (161) and the battery (2) in the second direction (Y) decreases from the end closer to the liquid inlet (112) to the end farther away from the liquid inlet (112).

6. The battery pack according to claim 4, characterized in that: The second guide plate (17) is provided with a second guide surface (171). The second guide plate (17) is connected to the other end of the housing (1) in the second direction (Y). The second guide surface (171) is provided on the side of the second guide plate (17) facing the battery (2). In the third direction (Z), the distance between the second guide surface (171) and the battery (2) in the second direction (Y) increases from the end away from the liquid outlet (113) to the end closer to the liquid outlet (113).

7. The battery pack according to claim 4, characterized in that: The inlet (112) is located at one end of the housing (1) in the third direction (Z), and the inlet (112) is connected to the first manifold (162); the outlet (113) is located at the other end of the housing (1) in the third direction (Z), and the outlet (113) is connected to the second manifold (172).

8. The battery pack according to claim 1, characterized in that: The housing (1) includes a frame (11), a first panel (12), and a second panel (13). The battery (2) is located inside the frame (11). The frame (11) is connected to the first panel (12) at one end in the first direction (X) and to the second panel (13) at the other end. The frame (11), the first panel (12), and the second panel (13) together form the first cavity (111). The first support plate (4) and the second support plate (5) are located along the first direction (X) on the first panel (111). 2) Between the first support plate (4) and the second support plate (5), the edges of the first support plate (4) and the second support plate (5) are respectively sealed to the frame (11). The first panel (12), the frame (11) and the first support plate (4) enclose the electrical cavity (1111), the first support plate (4), the frame (11) and the second support plate (5) enclose the heat exchange cavity (1112), and the second support plate (5), the frame (11) and the second panel (13) enclose the exhaust cavity (1113).

9. The battery pack according to claim 8, characterized in that: The first support plate (4) is sealed to the frame (11), and the housing (21) is sealed to the first support plate (4) at one end in the first direction (X) facing the first support plate (4); and / or, The second support plate (5) is sealed to the frame (11), and the housing (21) is sealed to the second support plate (5) in the first direction (X).

10. An electrical appliance, characterized in that: Includes the battery pack as described in any one of claims 1-9.

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