Battery pack and electric device

Abstract

The application provides a battery pack and an electric device, and relates to the technical field of battery packs. The battery pack comprises a heat exchange assembly, the heat exchange assembly comprises a plurality of heat exchange pieces and a fluid pipe, the fluid pipe is connected with two adjacent heat exchange pieces, the fluid pipe comprises a pipe body and a butt joint, the butt joint has a first axis, a direction of the butt joint pointing to the pipe body, a pipe diameter of an inner pipe wall of the butt joint is increased, an extension direction of a section of the inner pipe wall of the butt joint and an extension direction of the first axis have a first included angle A°, the butt joint has a first distance B mm between two end faces in a first direction, and adjacent two heat exchange pieces on a side close to the fluid pipe have a second distance C mm between end faces in a second direction or in a vertical direction, 27≤(A×B) / C≤2000. The battery pack and the electric device can meet the plug-in connection of the pipeline within a certain deviation range and improve the installation efficiency.

Description

Technical Field

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

[0002] A battery pack is a rechargeable energy storage device widely used in new energy vehicles, energy storage, and other fields. During use, the individual battery cells within the battery pack generate heat. Excessive heat can affect the performance, lifespan, and safety of the battery pack. Heat exchange components are typically installed between adjacent battery packs to manage battery thermal performance and prevent issues such as thermal runaway and lifespan degradation. In these heat exchange components, adjacent heat exchangers are connected by fluid pipes, and automated installation between adjacent heat exchangers is achieved by a robotic arm gripping the clamping section of the fluid pipe. However, during the actual assembly of the battery pack, assembly errors can occur in the relative positions of multiple heat exchangers. The ends of the fluid pipes are difficult to connect to the interfaces of heat exchangers with assembly errors, resulting in high installation difficulty and reduced installation efficiency. Therefore, improving installation efficiency has become an important research direction in this field. Utility Model Content

[0003] In view of this, one aspect of the present invention provides a battery pack that can improve installation efficiency through reasonable design. Another aspect of the present invention provides an electrical device including the aforementioned battery pack.

[0004] To achieve the above objectives, this application provides the following technical solution: In a first aspect, one embodiment of this application provides a battery pack, including a heat exchange assembly and a plurality of batteries arranged at intervals. The heat exchange assembly includes: a plurality of heat exchange elements, spaced apart along a first direction parallel to the arrangement direction of the plurality of batteries, at least one battery being placed between two adjacent heat exchange elements, the heat exchange elements being configured to provide heat exchange for the battery; and a fluid pipe connecting the two adjacent heat exchange elements. The fluid pipe includes: a pipe body extending along the first direction; and a connector connected to at least one side of the pipe body in the first direction, the connector communicating with the pipe body, and the connector having a first axis. The extension direction of the first axis is parallel to the first direction, pointing towards the interface along the tube body. The diameter of the inner tube wall of the interface increases, and the extension direction of the tangent of the inner tube wall of the interface has a first included angle A° with the extension direction of the first axis. The two end faces of the interface in the first direction have a first distance Bmm. Along the second direction or along the vertical direction, the end faces of two adjacent heat exchangers near the side where the fluid tube is located have a second distance Cmm. 27≤(A×B) / C≤2000. The first direction, the second direction and the vertical direction are mutually perpendicular.

[0005] Secondly, embodiments of this application also provide an electrical device, including the battery pack described above.

[0006] The battery pack and electrical device provided in this application embodiment take into account the problem of relative positional offset between adjacent heat exchange components in the second direction or vertical direction during actual assembly. The structure of the fluid pipe is optimized, and the relationships between the second distance Cmm of relative positional offset, the first included angle A° between the extension direction of the inner wall of the interface and the extension direction of the first axis pointing towards the interface along the pipe body, and the first distance Bmm between the two end faces of the interface in the first direction are limited: 27≤(A×B) / C≤2000. If the limitation of (A×B) / C is too large (greater than 2000), the length of the interface will account for too large a proportion of the overall length of the fluid pipe, resulting in a shorter flow channel for the heat exchange medium in the pipe body and making the processing and installation of the fluid pipe more difficult. If the limitation of (A×B) / C is too small (less than 27), the fluid pipe and heat exchange components will be difficult to assemble, resulting in low installation efficiency and poor sealing. This application reasonably limits (A×B) / C, so that the relative positional offset between the heat exchange components is within the allowable range, and both ends of the fluid pipe can be smoothly and quickly connected to the connector in the heat exchange component without repeated operations, reducing the difficulty of connection and improving installation efficiency.

[0007] In addition, by defining the relationship between the first included angle A°, the first distance Bmm, and the second distance Cmm, a high sealing performance can be achieved at the mating position between the inserted fluid pipe and the heat exchanger even when there is a relative positional offset between adjacent heat exchangers, thus preventing them from falling off. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0009] Figure 1 This is a perspective view of a battery pack provided in an embodiment of this application.

[0010] Figure 2 This is a schematic diagram of a heat exchange component and a battery in conjunction, provided as an embodiment of this application.

[0011] Figure 3 This is a front view of a fluid pipe in a heat exchange assembly provided in an embodiment of this application.

[0012] Figure 4 This is a cross-sectional view of a fluid pipe in a heat exchange assembly provided in an embodiment of this application.

[0013] Figure 5 This is a top view of a heat exchange component and a fluid pipe in a heat exchange assembly provided in an embodiment of this application.

[0014] Figure 6 This is a front view of the heat exchange component and the fluid pipe in a heat exchange assembly provided in an embodiment of this application.

[0015] Figure 7 This is a cross-sectional view of the mating joint and fluid pipe in a heat exchange assembly provided in an embodiment of this application.

[0016] Figure label: 100. Battery pack; 10. Heat exchange assembly; 1. Heat exchange component; 1a. First connector; 11a. Sealing section; 1b. Second connector; 1c. Heat exchange flow channel; 11. Heat exchange plate; 12. Protrusion; 2. Fluid pipe; 21. Pipe body; 22. Connecting interface; 22a. First axis; 2a. Outer reinforcing layer; 2b. Inner sealing layer; 20. Battery; 20a. Heat exchange area; 30. Housing; X. First direction; Y. Second direction; Z. Vertical direction. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] A battery pack, as a rechargeable energy storage device, is used in electrical devices to provide electrical energy. For example, electrical devices can be mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc., without specific limitations. For ease of explanation, this application embodiment applies the battery pack to a vehicle, i.e., the electrical device is set as a vehicle, which includes, but is not limited to, gasoline-powered vehicles, pure electric vehicles, hybrid vehicles, or range-extended vehicles. The battery pack, controller, and motor can be installed inside the vehicle, with the controller controlling the battery's power supply to the motor. For example, the battery pack can be installed at the bottom, front, or rear of the vehicle.

[0019] The battery pack includes a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (shell, brackets, etc.), and protective components, etc., and the above components are placed in a box and sealed with a cover plate to form a complete functional unit that can directly output electrical energy.

[0020] A battery pack is formed by connecting multiple battery cells with similar capacity and internal resistance in series or parallel. It is understood that a battery cell can also be referred to as a battery.

[0021] A battery can store chemical energy and controllably convert it into electrical energy. In a recyclable battery, the active materials can be reactivated by charging after discharge, allowing it to continue to be used. A battery may specifically include a casing and battery cells housed within the casing; details are not provided here.

[0022] The enclosure refers to a closed or semi-closed structure made of materials such as metal and plastic. It is the physical carrier of the battery pack, and its design and manufacturing must meet the safety, reliability and functionality requirements of the battery pack in different usage scenarios.

[0023] The enclosure includes a lower enclosure, which includes a bottom plate and a side plate connected to and surrounding the bottom plate; and an upper enclosure, which is connected to the side plate and has a cover plate opposite to the bottom plate. The upper enclosure and the lower enclosure together enclose a receiving chamber.

[0024] Alternatively, the enclosure can be cast from materials such as steel plate or aluminum alloy, or made of lightweight materials such as glass fiber reinforced composite materials or carbon fiber reinforced composite materials. The shape of the enclosure can be cylindrical, cuboid, cube, etc.

[0025] The battery pack also includes a heat exchange assembly, which is connected to an external circulation device that provides the heat exchange medium, so that the heat exchange medium can circulate in the heat exchange assembly, enabling the heat exchange assembly to heat the battery inside the casing and prevent thermal runaway.

[0026] The heat exchange assembly includes a heat exchange plate, which is used to exchange heat with the battery to regulate the battery temperature.

[0027] The heat exchange plate can be constructed as a liquid cooling plate or a phase change cooling plate and is thermally connected to the battery.

[0028] Optionally, the liquid cooling plate has liquid cooling channels, specifically, the shapes of which can be various, such as "U", "U-shaped", or "S-shaped. Optionally, the liquid cooling plate also includes an inlet and an outlet, both of which are connected to a collector for the inlet and outlet of the heat exchange medium. The liquid cooling plate can be made of a material with a certain hardness and strength (such as stainless steel). The material of the liquid cooling plate can be various, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc. The material of the liquid cooling plate can also be nylon, plastic, etc.

[0029] Specifically, the heat exchange assembly includes a plurality of heat exchange elements spaced apart along a first direction and disposed in a receiving chamber. One or more batteries are placed between two adjacent heat exchange elements, and the heat exchange elements are configured to provide heat exchange for the batteries. Each pair of adjacent heat exchange elements is connected by a fluid pipe, which is configured to allow a heat exchange medium to flow between the plurality of heat exchange elements.

[0030] Normally, a robotic arm is used to grip the heat exchange tubes so that both ends of the tubes can be automatically inserted into the connectors of adjacent heat exchange components. However, in the actual assembly of battery packs, the number of battery packs arranged along the first direction increases, as does the number of heat exchange components. During the assembly of multiple heat exchange components, assembly errors can occur between them, causing misalignment of the connectors of adjacent heat exchange components. This results in increased difficulty in inserting the fluid tube ends into the connectors due to assembly errors, requiring multiple insertion attempts. In cases of significant assembly errors, insertion may even be impossible. Therefore, improving installation efficiency through reasonable design is crucial for heat exchange components.

[0031] Figure 1 This is a perspective view of a battery pack provided in an embodiment of this application. Figure 2 This is a schematic diagram of a heat exchange component and a battery in conjunction, provided as an embodiment of this application. Figure 3 This is a front view of a fluid pipe in a heat exchange assembly provided in an embodiment of this application. Figure 4 This is a cross-sectional view of a fluid pipe in a heat exchange assembly provided in an embodiment of this application. Figure 5 This is a top view of a heat exchange component and a fluid pipe in a heat exchange assembly provided in an embodiment of this application. Figure 6 This is a front view of the heat exchange component and the fluid pipe in a heat exchange assembly provided in an embodiment of this application. Figure 7 This is a cross-sectional view of the mating joint and fluid pipe in a heat exchange assembly provided in an embodiment of this application. Arrow X points to a first direction, which is also the row direction of the multiple batteries 20 arranged in rows; arrow Y points to a second direction, which is also the column direction of the multiple batteries 20 arranged in columns; and arrow Z points to a vertical direction. The first direction X, the second direction Y, and the vertical direction Z intersect each other. Furthermore, the first direction X, the second direction Y, and the vertical direction Z are mutually perpendicular, which will not be emphasized separately thereafter.

[0032] To address the aforementioned problems, this application provides a battery pack, such as... Figures 1 to 7The battery pack 100 includes a heat exchange assembly 10 and a plurality of spaced-apart batteries 20. The heat exchange assembly 10 includes a plurality of heat exchange elements 1 and a fluid pipe 2. The plurality of heat exchange elements 1 are spaced apart along a first direction X, which is parallel to the arrangement direction of the plurality of batteries 20. At least one battery 20 is placed between two adjacent heat exchange elements 1. The heat exchange elements 1 are configured to exchange heat with the batteries 20. The heat exchange elements 1 have heat exchange channels 1c, which are configured to allow heat exchange medium to pass through. The fluid pipe 2 connects two adjacent heat exchange elements 1 and is configured to allow heat exchange medium to flow between the heat exchange elements 1.

[0033] Optionally, the heat exchange assembly 10 also includes heat exchange piping disposed on the base plate of the housing 30, which will not be described in detail.

[0034] Optionally, one or more batteries 20 may be provided between two adjacent heat exchangers 1. When multiple batteries 20 are provided between two adjacent heat exchangers 1, the multiple batteries 20 may be arranged in multiple rows along the first direction X and in multiple columns along the second direction Y. The arrangement can be adapted to actual needs without specific limitations.

[0035] It is understood that multiple batteries 20 disposed in the battery pack 100 can be electrically connected together in series, parallel or mixed manner. Multiple batteries 20 in the battery pack 100 can be arranged in multiple rows and columns in the accommodating chamber to form a battery group. A heat exchanger 1 is disposed between one or more batteries 20 adjacent in the row direction, which will not be described in detail.

[0036] Optionally, the fluid pipe 2 can be disposed on one side of the battery pack or on both sides of the battery pack in the second direction Y. Furthermore, the fluid pipe 2 disposed on the same side of the battery pack in the second direction Y can include two disposed at intervals along the vertical direction Z, or only one can be disposed. It can be adaptively adjusted according to actual needs and is not specifically limited.

[0037] Optionally, the heat exchange medium can be a water-cooled liquid or a gas, and can be adapted to meet actual needs without specific limitations.

[0038] The fluid pipe 2 includes a pipe body 21 and a connector 22. The pipe body 21 extends along a first direction X. The connector 22 is connected to at least one side of the pipe body 21 in the first direction X and communicates with the pipe body 21. The connector 22 has a first axis 22a. The extension direction of the first axis 22a is parallel to the first direction X and points from the pipe body 21 to the connector 22. The diameter of the inner pipe wall of the connector 22 increases, and the extension direction of the cross section of the inner pipe wall of the connector 22 has a first angle A° with the extension direction of the first axis 22a. The two end faces of the connector 22 in the first direction X have a first distance Bmm. Along the second direction Y or along the vertical direction Z, the end faces of two adjacent heat exchanger elements 1 near the side where the fluid pipe 2 is located have a second distance Cmm. 27≤(A×B) / C≤2000.

[0039] Optionally, the first axis 22a of the interface 22 coincides with the axis of the tube body 21.

[0040] It is understood that, depending on the actual assembly requirements, the interface 22 may be provided on only one side of the tube body 21, or it may be provided on both sides of the tube body 21, without specific limitation. In the embodiment of this application, the interface 22 is provided on both sides of the tube body 21.

[0041] Optionally, the heat exchanger 1 is configured as a square plate-shaped structure extending along the vertical plane containing the second direction Y and the vertical direction Z. When multiple heat exchangers 1 are assembled on the bottom plate of the housing 30, the heat exchangers 1 will have assembly errors in the second direction Y or the vertical direction Z, causing the adjacent heat exchangers 1 to have relative positional offsets in the second direction Y or the vertical direction Z, i.e., a second distance Cmm.

[0042] The heat exchange assembly provided in this application takes into account the problem of relative positional offset between adjacent heat exchange components 1 in the second direction Y or vertical direction Z during actual assembly. The structure of the fluid pipe 2 is optimized, and the relationships between the second distance Cmm of relative positional offset, the first included angle A° between the extension direction of the inner wall of the interface 22 and the extension direction of the first axis 22a pointing from the pipe body 21 to the interface 22, and the first distance Bmm between the two end faces of the interface 22 in the first direction X are limited: 27≤(A×B) / C≤2000. If the limitation of (A×B) / C is too large (greater than 2000), the length of the interface 22 will account for too large a proportion of the overall length of the fluid pipe 2, resulting in a shorter flow channel for the heat exchange medium in the pipe body 21 and making the processing and installation of the fluid pipe 2 more difficult. If the limitation of (A×B) / C is too small (less than 27), the fluid pipe 2 and the heat exchange component 1 will be difficult to assemble, resulting in low installation efficiency and poor sealing. This application reasonably limits (A×B) / C, so that the relative positional offset between the heat exchanger 1 is within the allowable range, and both ends of the fluid pipe 2 can be smoothly and quickly connected to the connector in the heat exchanger 1 without repeated operations, reducing the difficulty of connection and improving installation efficiency.

[0043] In addition, by defining the relationship between the first included angle A°, the first distance Bmm and the second distance Cmm, a high sealing performance can be achieved at the mating position between the inserted fluid pipe 2 and the heat exchanger 1, even when there is a relative positional offset between adjacent heat exchanger elements 1, thus preventing them from falling off.

[0044] In some optional embodiments, the heat exchanger 1 includes a first connector 1a and a second connector 1b connected to the heat exchange channel 1c. The first connector 1a and the second connector 1b located on the same heat exchanger 1 are arranged opposite to each other, and the center line of the first connector 1a coincides with the center line of the second connector 1b. The interface 22 is connected to both sides of the tube body 21. In two adjacent heat exchangers 1, the first connector 1a of one heat exchanger 1 is connected to the interface 22 on one side, and the second connector 1b of the other heat exchanger 1 is connected to the interface 22 on the other side. Setting the first connector 1a and the second connector 1b arranged opposite to each other on the same heat exchanger 1 as a mating structure with the center lines coincides allows the interfaces 22 at both ends of the fluid tube 2 to be quickly aligned with the first connector 1a and the second connector 1b on the two adjacent heat exchangers 1, thereby successfully completing the insertion.

[0045] It is understood that among the multiple heat exchangers 1 arranged along the first direction X, the two outermost heat exchangers 1 may consist of only one connector, such as the first connector 1a or the second connector 1b. This will not be described in detail.

[0046] Optionally, 45°≤A°≤60°, for example, A° can be 45°, 50°, 55°, 60°, etc., and / or, 3mm≤Bmm≤10mm, for example, Bmm can be 3mm, 6mm, 8mm, 10mm, etc.

[0047] Optionally, 0mm≤Cmm≤5mm, for example, Cmm can be 0mm, 0.3mm, 1mm, 3mm, 5mm, etc.

[0048] Optionally, the fluid pipe 2 includes a sleeved inner sealing layer 2b and an outer reinforcing layer 2a. The thickness of the inner sealing layer 2b is between 1 mm and 2 mm, and the thickness of the outer reinforcing layer 2a is between 0.4 mm and 1 mm. For example, the thickness of the inner sealing layer 2b is 1 mm and the thickness of the outer reinforcing layer 2a is 0.4 mm; the thickness of the inner sealing layer 2b is 1.5 mm and the thickness of the outer reinforcing layer 2a is 0.6 mm; the thickness of the inner sealing layer 2b is 2 mm and the thickness of the outer reinforcing layer 2a is 1 mm, etc. These can be adapted to actual needs and are not specifically limited.

[0049] like Figure 5 Along the second direction Y, there is a second distance Cmm between the end faces of two adjacent heat exchanger elements 1 near the side where the fluid pipe 2 is located, meaning that the heat exchanger elements 1 have a relative positional offset in the second direction Y. The first connector 1a and the second connector 1b located on two adjacent heat exchanger elements 1 are arranged opposite each other, and along the second direction Y, there is a third distance Emm between the center lines of the oppositely arranged first connector 1a and the center lines of the oppositely arranged first connector 1a and the second connector 1b, where 0mm≤Emm≤5mm. Ensuring that the distance between the center lines of the two oppositely arranged first connectors 1a and the second connector 1b is set within the allowable range in the second direction Y, that is, satisfying the relationship 27≤(A×B) / C≤2000, the two end interfaces 22 can be smoothly inserted with the corresponding first connectors 1a and second connectors 1b respectively, avoiding repeated insertion and thus improving installation efficiency.

[0050] For example, the third distance Emm can be set to 0mm, 2mm, 4mm, 5mm, etc.

[0051] Optionally, a heat exchange region 20a is provided between every two adjacent heat exchange elements 1. The heat exchange region 20a is configured to accommodate at least one battery 20, and multiple fluid pipes 2 are all disposed on the same side of the heat exchange region 20a in the second direction Y. Alternatively, the multiple fluid pipes 2 are disposed on both sides of the heat exchange region 20a in the second direction Y, and the specific arrangement can be adapted according to actual needs without being specifically limited.

[0052] Furthermore, when multiple fluid pipes 2 are respectively arranged on both sides of the heat exchange area 20a in the second direction Y, the first included angle A° in the fluid pipes 2 is set to 45°≤A°≤50°. By further narrowing the range of the first included angle A°, the fluid pipes 2 located on both sides can be quickly connected when the relative position deviation of the heat exchange element 1 is within a certain range.

[0053] like Figure 6 Along the vertical direction Z, there is a second distance Cmm between the end faces of two adjacent heat exchanger 1s near the side where the fluid pipe 2 is located. The first pair of connectors 1a and the second pair of connectors 1b located on the adjacent heat exchanger 1s are arranged opposite each other, and along the vertical direction Z, there is a fourth distance Fmm between the center lines of the oppositely arranged first pair of connectors 1a and the center lines of the oppositely arranged first pair of connectors 1a and the second pair of connectors 1b in the vertical direction Z. 0mm≤Fmm≤3mm. Ensuring that the distance between the center lines of the two oppositely arranged first pair of connectors 1a and the second pair of connectors 1b in the vertical direction Z is set within the allowable range satisfies the relationship 27≤(A×B) / C ≤ 2000. The two end interfaces 22 can then be smoothly inserted into the corresponding first pair of connectors 1a and the second pair of connectors 1b respectively, avoiding repeated insertions and thus improving installation efficiency.

[0054] Optionally, the area of ​​the outer tube wall located at the end face of the first connector 1a is smaller than the cross-sectional area of ​​the outer tube wall located at any position of the first connector 1a. By reducing the cross-sectional area of ​​the end face of the first connector 1a, it is easier for the first connector 1a to smoothly enter the mating interface 22, thus facilitating the insertion.

[0055] Optionally, the direction from the end face of the first connector 1a to the connected heat exchanger 1 is such that the cross-sectional area of ​​at least a portion of the outer tube wall of the first connector 1a is increased. That is, the end of the first connector 1a is configured with an umbrella-shaped structure. The inclined outer surface of the umbrella-shaped structure, during contact with the inner tube wall of the connector 22 and the resulting relative movement, provides guidance for insertion into the connector 22 and facilitates increasing the rate at which the first connector 1a extends into the connector 22.

[0056] It is understood that the first coupling 1a includes a sealing section 11a, which is located on the side of the first coupling 1a away from the connected heat exchanger 1. When the first coupling 1a is inserted into the corresponding fluid pipe 2, at least the sealing section 11a can be inserted into the coupling interface 22. The end of the first coupling 1a with the umbrella-shaped structure can serve as the sealing section 11a. As the inclined umbrella-shaped structure extends into the coupling interface 22, the deformation generated by the umbrella-shaped structure can seal the gap between the contact surfaces of the two, thus achieving high sealing performance.

[0057] Optionally, the ratio of the end face area of ​​the first connector 1a to the maximum cross-sectional area of ​​the sealing section 11a is between 0.08 and 1. The end face radius of the first connector 1a is between 4 mm and 13 mm, and the end face area is between 50.24 mm² and 530.66 mm². The radius of the maximum cross-section in the sealing section 11a is between 6 mm and 15 mm, and the maximum cross-sectional area is between 113.04 mm² and 706.50 mm², which can be adjusted adaptively according to actual needs. For example, the ratio of the end face area of ​​the first connector 1a to the maximum cross-sectional area of ​​the sealing section 11a can be 0.08, 0.2, 0.5, 1, etc. The end face radius and area of ​​the first connector 1a are less than or equal to the radius and cross-sectional area of ​​the maximum cross-section in the sealing section 11a, resulting in a better sealing effect when the connector is inserted into the fluid pipe 2.

[0058] Optionally, the sealing section 11a has a first length L1mm in the first direction X, where 3mm ≤ L1mm ≤ 10mm. By limiting the first length L1mm of the sealing section 11a, the first connector 1a can have a sufficient sealing contact area when inserted into one end of the fluid pipe 2, further improving the sealing performance and preventing the fluid pipe 2 from falling off due to assembly errors. For example, the first length L1mm can be set to 3mm, 6mm, 8mm, 10mm, etc.

[0059] In some alternative embodiments, when the first connector 1a is inserted into the corresponding fluid pipe 2, a fifth distance Gmm, 12mm ≤ Gmm ≤ 27mm, is provided between the end face of the first connector 1a and the end face of the inserted connector 22 along the first direction X. This ensures that the first connector 1a has sufficient sealing contact area when inserted into the fluid pipe 2, guaranteeing that the sealing performance is not affected by the relative positional deviation of the heat exchanger 1. For example, the fifth distance Gmm can be set to 12mm, 16mm, 22mm, 27mm, etc.

[0060] Optionally, in two adjacent heat exchangers 1, along the first direction X, there is a sixth distance Hmm between the end faces of the two first joints 1a, where 30mm ≤ Hmm ≤ 500mm. There is a first spacing L2mm between two adjacent heat exchangers 1, where 30mm ≤ L2mm ≤ 505mm. For example, the sixth distance Hmm can be set to 30mm, and the first spacing L2mm can be set to 30mm; the sixth distance Hmm can be set to 100mm, and the first spacing L2mm can be set to 101mm; the sixth distance Hmm can be set to 500mm, and the first spacing L2mm can be set to 505mm, etc. Excessive spacing avoids the fluid pipe 2 from being designed too long, which not only affects heat exchange efficiency but also makes it easy for the fluid pipe 2 to detach from the connected joints.

[0061] It should be emphasized that the first spacing L2mm between two adjacent heat exchangers 1 specifically refers to the distance between the two opposite sides of the two heat exchangers 1 in the first direction X, or it can be referred to as the distance between the opposite inner sides of the two adjacent heat exchangers 1.

[0062] It is understandable that the dimensions of the first connector 1a and the second connector 1b can be the same or different. The specific dimensions can be adjusted according to the design of the interface 22 at both ends of the fluid pipe 2 and the actual situation of the connection, without specific limitations.

[0063] It should be emphasized that when the dimensions of the second connector 1b are set to be the same as those of the first connector 1a, the structure of the second connector 1b and its mating relationship with the fluid pipe 2 can be referred to the relevant description of the first connector 1a, and will not be repeated here.

[0064] like Figure 7 When the first connector 1a and the second connector 1b are inserted into the corresponding fluid pipes 2, there is a seventh distance 1mm between the end faces of the first connector 1a and the second connector 1b connected to the same fluid pipe 2, where 20mm ≤ 1mm ≤ 200mm. For example, the seventh distance 1mm can be set to 20mm, 70mm, 100mm, 150mm, 200mm, etc. This is to avoid the situation where the distance between the first connector 1a and the second connector 1b after insertion is too close, resulting in insufficient buffer space for the heat exchange medium entering the pipe body 21. This could lead to the fluid pipe 2 rupturing due to excessive local pressure, or the sealing performance being affected by excessive pressure.

[0065] Optionally, when the first connector 1a is inserted into the corresponding fluid pipe 2, a portion of the first connector 1a extends into the pipe body 21, and / or, when the second connector 1b is inserted into the corresponding connector 22, a portion of the second connector 1b extends into the pipe body 21. This can further improve the sealing performance.

[0066] Optionally, when the first pair of connectors 1a and the second pair of connectors 1b are inserted into the corresponding fluid tubes 2, a second included angle M° is formed between the extension direction of the fluid tube 2 along the tube body 21 towards the interface 22 and the first direction X, where 0°≤M°≤45°. This facilitates smooth connection between the first pair of interfaces and the second pair of interfaces at both ends. For example, the second included angle M° can be set to 0°, 15°, 30°, 45°, etc.

[0067] In some embodiments, such as Figure 1 , Figure 2 , Figure 5 and Figure 6Multiple batteries 20 of the battery pack 100 are arranged along the first direction X and the second direction Y on the bottom plate of the housing 30, and at least one battery 20 is accommodated between every two adjacent heat exchange elements 1 in the heat exchange assembly 10.

[0068] It should be emphasized that the batteries 20 accommodated between each pair of adjacent heat exchangers 1 may include one or more arranged along the first direction X and / or along the second direction Y, which can be adapted to actual needs. In the embodiments of this application, at least two batteries 20 arranged along the first direction X are accommodated between each pair of adjacent heat exchangers 1.

[0069] In some embodiments, the battery 20 includes a first surface disposed opposite to each other along a first direction X and a second surface disposed opposite to each other along a second direction Y. The area of ​​the first surface is larger than the area of ​​the second surface. The heat exchanger 1 is configured to exchange heat with the first surface, thereby achieving a better heat exchange effect on the battery 20 and preventing thermal runaway of the battery 20.

[0070] The battery 20 also includes a third surface and a fourth surface arranged opposite each other in the vertical direction Z. The third surface is provided with an electrode post, and the fourth surface faces the bottom plate of the housing 30. The bottom plate may be provided with heat exchange pipes for cooling the fourth surface of the battery 20.

[0071] In some optional embodiments, the heat exchanger 1 includes a heat exchange plate 11 and a protrusion 12. The heat exchange plate 11 extends in the vertical direction Z and faces the first surface. The protrusion 12 is connected to one side of the heat exchange plate 11 in the vertical direction Z and extends in the first direction X. The orthographic projection of the protrusion 12 in the vertical direction Z onto the third surface overlaps with the third surface. The protrusion 12 is configured to cool the third surface. This further improves the cooling effect on the battery 20 and reduces the risk of thermal runaway of the battery 20.

[0072] Optionally, along the vertical direction Z, the protrusion 12 may contact the third surface of the battery 20, or the protrusion 12 may not contact the third surface of the battery 20, that is, there is a gap between the protrusion 12 and the third surface, without specific limitation.

[0073] Furthermore, the heat exchange plate 11 and the protrusion 12 can be integrally formed, or they can be formed into a separate structure by welding, detachable connection, etc., without specific limitations. The heat exchange component 1 includes a heat exchange channel 1c communicating with the first connector 1a and the second connector 1b. The heat exchange channel 1c can be arranged in a serpentine manner on the heat exchange plate 11. Further, the heat exchange channel 1c can extend to the protrusion 12 to improve the heat exchange effect of the protrusion 12 on the third surface of the battery 20, without specific limitations.

[0074] Alternatively, the protrusion 12 may extend to a position close to or corresponding to the pole post, so that the protrusion 12 is configured to also be able to exchange heat with the pole post, which will not be described in detail.

[0075] In some alternative embodiments, the heat exchange plate 11 may be provided with protrusions 12 on both sides of the vertical direction Z. The protrusions 12 on both sides are used to exchange heat on the third surface and the fourth surface of the battery 20, respectively, so as to further improve the heat exchange effect on the battery 20.

[0076] Optionally, the structure of the protrusion 12 used for heat exchange on the fourth surface and its cooperation with the fourth surface can be referred to the relevant description of the protrusion 12 provided for heat exchange on the third surface, and will not be repeated here.

[0077] This application also provides an electrical device, including a battery pack 100. The specific details of the battery pack 100 can be found in the relevant descriptions in the above embodiments, and will not be repeated here.

[0078] A battery pack can be installed in an electrical device to provide electrical energy to it. For example, the electrical device can be a mobile phone, portable device, laptop, electric vehicle, electric car, ship, spacecraft, electric toy, or power tool, etc., without specific limitations. For ease of explanation, this application embodiment applies the battery pack to a vehicle, i.e., the electrical device is set in a vehicle, including but not limited to gasoline-powered vehicles, pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. The battery pack, controller, and motor can be installed inside the vehicle, with the controller controlling the battery's power supply to the motor. For example, the battery pack can be installed at the bottom, front, or rear of the vehicle.

[0079] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0080] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0081] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0082] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0083] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0084] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A battery pack, characterized in that, Includes a heat exchange assembly (10) and a plurality of spaced-apart batteries (20), the heat exchange assembly (10) comprising: Multiple heat exchange elements (1) are spaced apart along a first direction (X), which is parallel to the arrangement direction of the multiple batteries (20). At least one battery (20) is placed between two adjacent heat exchange elements (1), and the heat exchange elements (1) are configured to exchange heat for the battery (20). A fluid pipe (2) connects two adjacent heat exchangers (1); The fluid tube (2) includes: The tube body (21) extends along the first direction (X); A connector (22) is connected to at least one side of the tube body (21) in the first direction (X). The connector (22) communicates with the tube body (21). The connector (22) has a first axis (22a) whose extension direction is parallel to the first direction (X) and along the direction from the tube body (21) to the connector (22). The diameter of the inner tube wall of the connector (22) is increased, and the extension direction of the cross section of the inner tube wall of the connector (22) is parallel to the first direction (X). The first axis (22a) has a first included angle A° between its extension directions, the interface (22) has a first distance Bmm between its two end faces in the first direction (X), and a second distance Cmm between the end faces of two adjacent heat exchanger (1) near the side where the fluid pipe (2) is located, along the second direction (Y) or along the vertical direction (Z), 27≤(A×B) / C≤2000, and the first direction (X), the second direction (Y) and the vertical direction (Z) are mutually perpendicular.

2. The battery pack according to claim 1, characterized in that, The heat exchanger (1) has a heat exchange channel (1c). The heat exchanger (1) includes a first connector (1a) and a second connector (1b) connected to the heat exchange channel (1c). The first connector (1a) and the second connector (1b) located in the same heat exchanger (1) are arranged opposite to each other, and the center line of the first connector (1a) coincides with the center line of the second connector (1b). The interface (22) is connected to both sides of the tube body (21). In two adjacent heat exchange components (1), the first interface (1a) of one heat exchange component (1) is connected to the interface (22) on one side, and the second interface (1b) of the other heat exchange component (1) is connected to the interface (22) on the other side.

3. The battery pack according to claim 2, characterized in that, Along the second direction (Y), the end faces of two adjacent heat exchangers (1) near the side where the fluid pipe (2) is located have the second distance C mm. The first pair of connectors (1a) and the second pair of connectors (1b) located in two adjacent heat exchangers (1) are arranged opposite to each other, and along the second direction (Y), there is a third distance Emm between the center line of the first pair of connectors (1a) and the center line of the second pair of connectors (1b) arranged opposite to each other, where 0mm≤Emm≤5mm.

4. The battery pack according to claim 2, characterized in that, Along the vertical direction (Z), the second distance Cmm exists between the end faces of two adjacent heat exchangers (1) near the side where the fluid pipe (2) is located. The first pair of connectors (1a) and the second pair of connectors (1b) located in two adjacent heat exchangers (1) are arranged opposite to each other, and along the vertical direction (Z), there is a fourth distance Fmm between the center line of the first pair of connectors (1a) and the center line of the second pair of connectors (1b) arranged opposite to each other, where 0mm≤Fmm≤3mm.

5. The battery pack according to claim 4, characterized in that, The cross-sectional area of ​​the outer tube wall of at least a portion of the first joint (1a) increases from the end face of the first joint (1a) toward the connected heat exchanger (1).

6. The battery pack according to claim 2, characterized in that, The first connector (1a) includes a sealing section (11a) located on the side of the first connector (1a) away from the heat exchanger (1) to which it is connected, such that when the first connector (1a) is inserted into the corresponding fluid pipe (2), at least the sealing section (11a) can be inserted into the connector (22).

7. The battery pack according to claim 6, characterized in that, The ratio of the end face cross-sectional area of ​​the first connector (1a) to the maximum cross-sectional area in the sealing section (11a) is between 0.08 and 1.

8. The battery pack according to claim 7, characterized in that, The end face radius of the first connector (1a) is between 4mm and 13mm, and the end face area of ​​the first connector (1a) is between 50.24mm² and 530.66mm²; and / or, The maximum cross-sectional radius of the sealing section (11a) is between 6mm and 15mm, and the maximum cross-sectional area of ​​the sealing section (11a) is between 113.04mm² and 706.50mm².

9. The battery pack according to claim 6, characterized in that, The sealing section (11a) has a first length L1mm in the first direction (X), where 3mm≤L1mm≤10mm.

10. The battery pack according to claim 2, characterized in that, When the first connector (1a) is inserted into the corresponding fluid tube (2), there is a fifth distance Gmm between the end face of the first connector (1a) and the end face of the connector (22) at the inserted end along the first direction (X), the fifth distance being 12mm≤Gmm≤27mm.

11. The battery pack according to claim 2, characterized in that, In two adjacent heat exchangers (1), along the first direction (X), there is a sixth distance Hmm between the end faces of the two first connectors (1a), where 30mm≤Hmm≤500mm.

12. The battery pack according to claim 2, characterized in that, When the first connector (1a) and the second connector (1b) are inserted into the corresponding fluid tube (2), there is a seventh distance 1 mm between the end face of the first connector (1a) and the end face of the second connector (1b) connected to the same fluid tube (2), where 20 mm ≤ 1 mm ≤ 200 mm.

13. The battery pack according to claim 1, characterized in that, 45°≤A°≤60°, and / or, 3mm≤Bmm≤10mm.

14. The battery pack according to claim 1, characterized in that, 0mm≤Cmm≤5mm.

15. The battery pack according to claim 3 or 4, characterized in that, When the first connector (1a) and the second connector (1b) are inserted into the corresponding fluid tube (2), there is a second included angle M° between the extension direction of the fluid tube (2) along the tube body (21) pointing to the connector (22) and the first direction (X), where 0°≤M°≤45°.

16. The battery pack according to claim 1, characterized in that, The fluid pipe (2) includes a sleeved inner sealing layer (2b) and an outer reinforcing layer (2a). The thickness of the inner sealing layer (2b) is between 1 mm and 2 mm, and the thickness of the outer reinforcing layer (2a) is between 0.4 mm and 1 mm.

17. The battery pack according to claim 1, characterized in that, A heat exchange region (20a) is provided between each pair of adjacent heat exchange elements (1), the heat exchange region (20a) being configured to accommodate at least one of the batteries (20), and a plurality of fluid pipes (2) being disposed on the same side of the heat exchange region (20a) in the second direction (Y).

18. The battery pack according to claim 1, characterized in that, A heat exchange region (20a) is provided between each pair of adjacent heat exchange elements (1), the heat exchange region (20a) is configured to accommodate at least one of the batteries (20), and a plurality of fluid pipes (2) are respectively disposed on both sides of the heat exchange region (20a) in the second direction (Y), and 45°≤A°≤50°.

19. The battery pack according to claim 2, characterized in that, The second pair of connectors (1b) has the same dimensions as the first pair of connectors (1a).

20. The battery pack according to claim 1, characterized in that, There is a first distance L2mm between two adjacent heat exchangers (1), where 30mm≤L2mm≤505mm.

21. The battery pack according to claim 1, characterized in that, The battery (20) includes a first surface disposed opposite to each other along the first direction (X) and a second surface disposed opposite to each other along the second direction (Y), the first direction (X) and the second direction (Y) intersect, the area of ​​the first surface is greater than the area of ​​the second surface, and the heat exchanger (1) is configured to exchange heat with the first surface.

22. The battery pack according to claim 21, characterized in that, At least two of the batteries (20) are accommodated between each pair of adjacent heat exchangers (1).

23. The battery pack according to claim 22, characterized in that, The battery (20) includes a third surface disposed on one side along a vertical direction (Z), the third surface being provided with electrode posts, and the heat exchanger (1) includes: A heat exchange plate (11) extends in a vertical direction (Z) and faces the first surface; A protrusion (12) is connected to one side of the heat exchange plate (11) in the vertical direction (Z). The protrusion (12) extends along the first direction (X). The orthographic projection of the protrusion (12) onto the third surface in the vertical direction (Z) overlaps with the third surface. The protrusion (12) is configured to exchange heat with the third surface.

24. An electrical appliance, characterized in that, Includes the battery pack (100) as described in any one of claims 1-23.

Images