Battery and electric device

Abstract

A battery (1) and an electric device. The battery (1) comprises: a case body (200); battery cells (102), which are provided in the case body (200); a first heat exchange member (100), which is fitted to the outside of the case body (200); and a fixing member (25), which is provided on the case body (200), wherein the fixing member (25) is arranged close to at least one edge (100d) of the first heat exchange member (100), and is fastened and connected to the first heat exchange member (100) and the case body (200).

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202420286780.X and application date of February 6, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0004] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, batteries, as the power source, play an irreplaceable and crucial role. Batteries consist of a housing and multiple cells housed within it. As core components of new energy vehicles, batteries are subject to stringent safety and longevity requirements. To ensure battery life, existing technologies utilize cold plates connected to the housing to cool the batteries. However, the reliability of the connection between the cold plate and the housing limits further improvements in battery reliability and lifespan.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a battery and an electrical device, which can effectively improve the reliability of the battery.

[0007] In a first aspect, an embodiment of the present application provides a battery, comprising: a box body; a battery cell, disposed in the box body; a first heat exchange member, fittedly disposed outside the box body; a fixing member, disposed in the box body, the fixing member being disposed near at least one edge of the first heat exchange member and fastening the first heat exchange member and the box body.

[0008] In the above technical solution, the fixing part can be arranged close to at least one edge of the first heat exchanger, thereby fixing at least one edge of the first heat exchanger to the box body, which can improve the connection reliability between the area where the edge of the first heat exchanger is located and the box body, thereby improving the connection firmness between the first heat exchanger and the box body, which is beneficial to improving the overall heat exchange stability of the first heat exchanger to the battery, thereby improving the reliability of the battery.

[0009] In some embodiments of the present application, the first heat exchange element includes a first heat exchange channel, the first heat exchange channel includes a first heat exchange section and a second heat exchange section; the second heat exchange section is bent to form a U-shaped area, the first heat exchange section is bent and arranged in the U-shaped area, and is connected to the second heat exchange section by bending; the fixing member is connected to the first heat exchange section and the second heat exchange section, and is arranged close to or corresponding to the bent part of the first heat exchange section and the second heat exchange section.

[0010] In the above technical solution, the second heat exchange section is bent to form a U-shaped area, and the first heat exchange section is bent and arranged in the U-shaped area. When the first heat exchange element exchanges heat with the battery, the U-shaped area formed by the outer second heat exchange section can be opposite to the outer battery cells of the battery, and the first heat exchange section in the U-shaped area can be opposite to the inner battery cells. This allows the first heat exchange element to compensate for the internal and external temperature difference caused by the heat exchange between the outer battery cells and the environment, so that the heat exchange effect of the battery cells outside the battery and the battery cells inside the battery tends to be consistent, thereby improving the temperature uniformity of the battery, thereby improving the service life of the battery to a certain extent. The fixing member can play a restraining and limiting role in the area where the bent parts of the first and second heat exchange sections are located, thereby improving the connection reliability of the bent parts of the first and second heat exchange sections and the box body, thereby improving the working reliability of the first and second heat exchange sections, and helping to improve the reliability of the battery.

[0011] In some embodiments of the present application, the first heat exchange section includes: a first heat exchange part and a first bending part, there are multiple first heat exchange parts, the multiple first heat exchange parts are arranged at intervals in the first direction, and are connected in sequence through the first bending parts, each first heat exchange part extends along the second direction, the second direction is arranged at an angle to the first direction, and the first bending part is arc-shaped; the fixing part is connected to the first bending part or the part of the first heat exchange part close to the first bending part.

[0012] In the above technical solution, by setting the first heat exchange portion to extend linearly along the second direction, the production difficulty of the first heat exchange portion can be reduced, thereby reducing the production complexity of the first heat exchange channel. At the same time, the straight tube can also increase the flow rate of the heat exchange fluid, thereby improving the heat exchange effect of the first heat exchange channel. By setting the first bend, the flow direction of the fluid inside the first heat exchange section can be changed, achieving a smooth transition between the two first heat exchange portions and a circuitous extension of the first heat exchange channel. As a result, the contact area between a single battery cell and the first heat exchange channel can be increased, thereby increasing the heat exchange area and improving the heat exchange efficiency of the first heat exchange channel. At the same time, the arc-shaped first bend can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further increasing the heat exchange efficiency of the first heat exchange section. In addition, the provision of the first bend also makes the structure of the first heat exchange section more compact, occupies a smaller overall space size, and is more conducive to the miniaturization design of the battery and ensures the volume energy density of the battery. Connecting the first bending portion or the portion of the first heat exchange portion close to the first bending portion through a fixing member can improve the reliability of the first heat exchange portion and the first bending portion, thereby improving the heat exchange stability of the battery cell, which is beneficial to improving the reliability of the battery.

[0013] In some embodiments of the present application, there are multiple fixing members, and they are at least arranged on both sides of the first heat exchange section along the second direction. Each fixing member extends along the first direction and connects at least one adjacent first bending portion and / or the portion of the first heat exchange portion close to the first bending portion.

[0014] In the above technical solution, by providing multiple fixings, and the multiple fixings are provided at least on both sides of the first heat exchange section along the second direction, the fixing position of the first heat exchange section and the box body can be increased, thereby improving the reliability of the connection between the first heat exchange section and the box body, reducing the probability of separation or loose glue between the first heat exchange section and the box body, and further improving the overall reliability of the battery. The fixings extend along the first direction and connect at least one adjacent first bend portion and / or the portion of the first heat exchange section near the first bend portion. In this way, each fixing can simultaneously fix multiple first heat exchange sections, which can reduce the number of fixings, reduce the number of assembly steps, improve assembly efficiency, and help shorten the production time of the battery.

[0015] In some embodiments of the present application, the second heat exchange section includes: a second heat exchange part, a third heat exchange part, a fourth heat exchange part, a second bend part and a third bend part, the second heat exchange part extends along the first side circumference of the first heat exchange section, the third heat exchange part is connected between the second heat exchange part and the first heat exchange section, and extends along the second side circumference of the first heat exchange section, the first end of the third heat exchange part is connected to the second heat exchange part at an angle, the second end of the third heat exchange part is connected to the first heat exchange section at an angle, the fourth heat exchange part is communicated with the second heat exchange part, and is connected to the second heat exchange part at an angle, and extends along the third side circumference of the first heat exchange section; the second bend part and the third bend part are both arc-shaped, the second bend part is connected between the first end of the third heat exchange part and the second heat exchange part, and the third bend part is connected between the second end of the third heat exchange part and the first heat exchange section; the fixing member is connected to the second bend part or the part of the second heat exchange part close to the second bend part; the fixing member is connected to the third bend part or the part of the first heat exchange section close to the third bend.

[0016] In the above technical solution, by arranging the second heat exchange part, the third heat exchange part, and the fourth heat exchange part on three sides of the first heat exchange section respectively, the second heat exchange section can surround the first heat exchange section, thereby increasing the compactness of the arrangement of the first heat exchange channel, realizing the miniaturization of the structure of the first heat exchange channel, and thus facilitating the volume energy density of the battery. At the same time, it can also simplify the structure of the first heat exchange channel, facilitating the processing and production of the first heat exchange component. By providing the second bend portion, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the second bend portion; at the same time, the arc shape can also reduce the resistance to the flow of the fluid, allowing the fluid to flow smoothly in the second bend portion, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency. The second bending part or the part of the second heat exchange part close to the second bending part is connected by a fixing part, and the third bending part or the part of the first heat exchange section close to the third bending part is connected by a fixing part. In this way, the connection reliability of the second bending part and the second heat exchange part adjacent area, as well as the third bending part and the first heat exchange section adjacent area with the box body can be improved, and the stability of the heat exchange fluid flowing through the second heat exchange part, the second bending part, the third bending part and the first heat exchange section can be improved, which is beneficial to improving the heat exchange reliability of the first heat exchange part to the battery cell, thereby improving the reliability of the battery.

[0017] In some embodiments of the present application, the first heat exchange section includes a plurality of first heat exchange parts, which are bent and connected in sequence in the first direction, and each first heat exchange part extends along the second direction, and the second direction is set at an angle to the first direction; the first heat exchange channel also includes: a third heat exchange section and a fourth bending part, the third heat exchange section is arranged on the side of the first heat exchange section away from the third heat exchange part, the third heat exchange section is connected to the one of the plurality of first heat exchange parts that is closest to the second heat exchange part along the first direction, and the fourth bending part is arc-shaped and connected between the third heat exchange section and the first heat exchange part; the fixing part is connected to the fourth bending part or the part of the first heat exchange part close to the fourth bending part.

[0018] In the above technical solution, by providing a third heat exchange section, the heat exchange area of ​​the first heat exchange channel can be further increased, and the heat exchange effect of the first heat exchange channel can be further improved. By providing a fourth bend, the flow direction of the fluid can be changed from the original flow direction to a direction perpendicular to the original flow direction after passing through the fourth bend; at the same time, the arc shape can also reduce the resistance to fluid flow, so that the fluid can flow smoothly in the fourth bend, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency. By providing a fixing part to connect the fourth bend or the part of the first heat exchange part close to the fourth bend, the probability of debonding or loose glue pressing between the fourth bend and the box body can be reduced, and the heat exchange reliability between the heat exchange fluid and the battery cell when flowing through the fourth bend is improved, thereby improving the reliability of the battery.

[0019] In some embodiments of the present application, there are multiple fixing members, and they are at least arranged on both sides of the first heat exchange section along the second direction, and each fixing member extends along the first direction; one of the multiple fixing members close to the third heat exchange section is the first fixing member, and the other close to the third heat exchange section is the second fixing member, the first fixing member is connected to or arranged close to the second bending portion, and connected to or arranged close to the third bending portion, and the second fixing member is connected to or arranged close to the fourth bending portion.

[0020] In the above technical solution, among the multiple fixing parts, the first fixing part can be connected to or arranged near the second bending part, and connected to or arranged near the third bending part, and the second fixing part can be connected to or arranged near the fourth bending part, that is, the second bending part and the third bending part are located at one end of the first heat exchange section along the second direction, and the fourth bending part is located at the other end of the first heat exchange section along the second direction. Therefore, by arranging the first fixing part and the second fixing part, the bending parts of the first heat exchange section located at both ends of the second direction can be fixed respectively, thereby enabling the various bending parts of the first heat exchange part to be better fixed on the box body, further improving the connection reliability of the first heat exchange part and the box body.

[0021] In some embodiments of the present application, the first heat exchange channel also includes: a first inlet and outlet section, one end of the first inlet and outlet section is connected to the third heat exchange section at an angle, and the other end of the first inlet and outlet section forms a first inlet and outlet of the heat exchange channel; the first inlet and outlet section extends along the second direction away from the first heat exchange section, and the third heat exchange section is extended along the first direction.

[0022] In the above technical solution, by providing the first inlet and outlet section, external piping can be facilitated, allowing heat exchange medium to enter or exit the first heat exchange channel. At the same time, it can also guide the heat exchange fluid entering or exiting the first heat exchange channel, allowing the heat exchange fluid to enter or exit quickly, thereby improving the heat exchange rate. By providing the first inlet and outlet section to extend along the second direction away from the first heat exchange section, the piping layout of the first heat exchange channel can be more rationalized and facilitated to connect with external piping. At the same time, the first inlet and outlet can be away from the battery assembly composed of multiple rows of battery cells, which is beneficial to reduce the possibility of damage to the battery assembly due to water leakage from the first inlet and outlet.

[0023] In some embodiments of the present application, the second heat exchange portion extends along the second direction, and the second heat exchange section also includes: a sixth bend portion, the sixth bend portion is arc-shaped, and is connected between one end of the fourth heat exchange portion and the end of the second heat exchange portion away from the third heat exchange portion, and the other end of the fourth heat exchange portion extends along the first direction toward the direction away from the second heat exchange portion, and the first direction and the second direction are set at an angle; the fixing member is connected to the sixth bend portion or the portion of the second heat exchange portion close to the sixth bend portion.

[0024] In the above technical solution, by setting the sixth bend, the flow direction of the fluid in the first heat exchange channel can be changed, and the circuitous arrangement of the first heat exchange channel can be realized. As a result, the heat exchange area of ​​the first heat exchange channel can be increased, and the heat exchange efficiency of the first heat exchange channel can be improved. At the same time, the sixth bend is arc-shaped, which can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel.

[0025] In some embodiments of the present application, the first heat exchange channel also includes: a second inlet and outlet section, one end of the second inlet and outlet section is connected to the fourth heat exchange part at an angle, and the other end of the second inlet and outlet section forms a second inlet and outlet of the heat exchange channel; and the second inlet and outlet section extends along the second direction away from the first heat exchange section, and the fourth heat exchange part is extended along the first direction.

[0026] In the above-described embodiment, the provision of a second inlet and outlet section facilitates external piping, allowing heat exchange medium to enter or exit the first heat exchange channel, completing heat exchange for the battery cells. It also guides the heat exchange fluid entering or exiting the first heat exchange channel, allowing for rapid entry or exit, thereby increasing the heat exchange rate. By extending the second inlet and outlet section in a second direction away from the first heat exchange section, the piping layout of the first heat exchange channel can be more rationalized and facilitated connection to external piping. Furthermore, the second inlet and outlet can be positioned away from the battery assembly, reducing the risk of damage to the battery assembly due to water leakage at the second inlet and outlet.

[0027] In some embodiments of the present application, there are multiple first heat exchange elements, which are arranged at intervals along the first direction, and the first direction and the second direction are arranged at an angle; the fixing element is connected to at least one adjacent first bending portion of the multiple first heat exchange elements or the portion of the first heat exchange portion close to the first bending portion.

[0028] In the above technical solution, by providing a plurality of first heat exchange elements, and arranging them at intervals along the first direction, and arranging them at an angle between the first direction and the second direction, the diversity of the first heat exchange elements can be increased, thereby improving the adaptability of the first heat exchange elements, enabling them to meet different battery requirements, thereby improving the market competitiveness of the battery; at the same time, arranging the plurality of first heat exchange elements in parallel can enable the plurality of first heat exchange elements to exchange heat simultaneously, thereby reducing the heat exchange time of a single first heat exchange element and improving the heat exchange efficiency. By connecting the fixing element to at least one adjacent first bend portion of the plurality of first heat exchange elements or the portion of the first heat exchange element close to the first bend portion, the fixing element can simultaneously fix the plurality of first heat exchange elements to the box body, thereby reducing the number of fixing elements, reducing the number of assembly steps, and improving assembly efficiency.

[0029] In some embodiments of the present application, the first heat exchange element includes at least one heat exchange tube. When there are multiple heat exchange tubes, the multiple heat exchange tubes are arranged at intervals and connected in sequence, and the inner wall of each heat exchange tube is surrounded to form a first heat exchange channel.

[0030] In the above-described embodiment, by configuring the first heat exchange element to include at least one heat exchange tube, not only can the process complexity of the first heat exchange element be reduced, thereby increasing the production rate of the first heat exchange element, but it can also reduce the fluid pressure drop within a single heat exchange tube, thereby improving heat exchange efficiency. Furthermore, compared to a plate-like structure, a tubular structure is simpler, less expensive, and easier to manufacture.

[0031] In some embodiments of the present application, the box body has a plurality of box walls, at least one of the plurality of box walls is a first box wall, the first box wall is provided with a first groove, and the fixing member is at least partially located in the first groove.

[0032] In the above technical solution, since the fixing member is at least partially disposed within the first groove, the first groove provides the space required for installing the fixing member. This, on the one hand, improves the structural compactness of the assembly formed by the box body, the fixing member, and the first heat exchange element, allowing for a relatively small overall size, thereby saving space, reducing the volume, and improving the volumetric energy density of the battery. On the other hand, the first groove acts as a restraining force on the fixing member, improving the reliability of the connection between the fixing member and the box body, and thus the connection between the first heat exchange element and the box body, thereby improving the reliability of the battery and extending its service life.

[0033] In some embodiments of the present application, a portion of the first box wall protrudes toward a side away from the first heat exchange element to form a convex portion, and a peripheral wall of the protruding position of the convex portion forms a first groove.

[0034] In the above technical solution, the protrusion protrudes toward the inside of the battery body, and the peripheral wall at the protruding location forms a first groove. Thus, while the first wall is provided with the first groove and can accommodate the fixing member, the thickness of the remaining portion of the first wall, excluding the protrusion, can be made relatively thin, which helps reduce the thickness and weight of the first wall, thereby improving the energy density of the battery. Furthermore, the formation of the first groove on the peripheral wall of the protrusion also helps improve the strength of the first groove, reducing the structural strength problem of the first wall due to the provision of the first groove. This can improve the reliability of the first wall, thereby improving the reliability of the battery body, and thus improving the reliability of the battery as a whole.

[0035] In some embodiments of the present application, the protrusion protrudes toward the inner side of the box body, and the battery further includes: a beam body, the beam body is arranged in the box body, the beam body is provided with a second groove, and at least part of the protrusion is located in the second groove.

[0036] In the above technical solution, by providing a second groove in the beam to accommodate the protrusion, the beam and the protrusion can be combined, reducing the probability of the protrusion occupying the space required by the battery cells in the box body, which is conducive to improving the compactness of the internal structure of the battery, thereby increasing the volumetric energy density of the battery. Secondly, the protrusion and the second groove can cooperate to limit the beam, improving the connection reliability between the beam and the box body, thereby improving the reliability of the battery.

[0037] In some embodiments of the present application, the beam body and the fixing member extend along the first direction, and the second groove and the protrusion extend along the first direction.

[0038] In the above technical solution, the beam body, fixing member, second groove, and protrusion are all elongated. The elongated second groove and protrusion not only increase the strength of the beam body, but also improve the tensile and bending strength of the beam body in the first direction, thereby improving the overall strength of the beam body. The elongated fixing member, on the one hand, works together with the protrusion to further enhance the structural strength of the beam body, and on the other hand, provides more fixing positions and a larger fixing surface, thereby enhancing the fixing effect on the first heat exchanger. While achieving a better fixing effect on the first heat exchanger, it can also reduce the number of fixing members and improve assembly efficiency.

[0039] In some embodiments of the present application, the beam body is an expansion beam, which can expand or contract along a second direction, and the second direction is parallel to the first box wall and perpendicular to the first direction.

[0040] In the above technical solution, since the fixing member extends along the first direction, and the second groove and the protrusion extend along the first direction, the fixing member and the protrusion can improve the structural strength of the expansion beam, and improve the tensile and bending strength of the expansion beam in the first direction, and thus improve the reliability of the expansion beam, thereby helping to reduce the probability of stress concentration and structural instability in the battery cell, and further improve the overall reliability of the battery.

[0041] In some embodiments of the present application, the beam body is a hollow beam, and a portion of the beam body protrudes toward the inside of the hollow beam to form a second groove.

[0042] In the above technical solution, by configuring the beam body as a hollow beam and allowing a portion of the beam body to protrude inwardly to form a second groove, the strength of the beam body can be further increased, thereby improving the reliability of the beam body. Furthermore, since the beam body is a hollow beam, the second groove can be formed by protruding inwardly, which helps to reduce the difficulty of forming the second groove, improve the manufacturability of the second groove, and thus reduce manufacturing costs. The hollow beam body can also reduce the weight of the beam body, thereby reducing the overall weight of the battery and increasing the energy density of the battery. Furthermore, the hollow beam body has higher strength and rigidity, can provide better support, and can reduce the amount of material used, further reducing manufacturing costs.

[0043] In some embodiments of the present application, the protrusion and the second groove are bonded together. In this technical solution, the bonding between the protrusion and the second groove can make the connection between the two closer and more secure, while also improving the connection reliability between the beam and the box body, and further enhancing the strength-enhancing effect of the protrusion on the beam, thereby making the beam stronger.

[0044] In some embodiments of the present application, the beam body is a non-metallic beam body. In this technical solution, since the protrusion and the second groove cooperate to increase the strength of the beam body, the beam body's inherent strength requirements can be reduced. By setting the beam body as a non-metallic beam body, the weight of the beam body can be reduced while also improving electrical safety and enhancing thermal insulation.

[0045] In some embodiments of the present application, the first box wall is the bottom wall of the box body, and the first heat exchange element is located outside the box body.

[0046] In the above technical solution, the first wall, which serves as the bottom wall, can have a larger surface area. This allows the first heat exchange element, when located on the bottom wall, to have a larger exchange area, thereby enhancing the heat exchange effect of the first heat exchange element on the battery cells, thereby improving heat exchange efficiency. Positioning the first heat exchange element outside the main body of the box reduces the risk of coolant leaking from the first heat exchange element into the main body, thereby improving battery reliability.

[0047] In some embodiments of the present application, the box body includes: a box body and a bottom plate, the bottom of the box body is provided with a first opening, the bottom plate is connected to the bottom of the box body to close the first opening, the first heat exchange component is attached to the side of the bottom plate away from the box body, and the fixing component is provided on the bottom plate.

[0048] In the above technical solution, since the bottom plate is typically the largest plate in the box body, the first heat exchange element is attached to the side of the bottom plate away from the box body. This creates a larger heat exchange surface with the battery cells within the box body, improving heat exchange effects and efficiency. The fixing element is located on the bottom plate and secures the first heat exchange element to the outside of the box body, reducing the space occupied by the fixing element within the box body and minimizing its impact on the space required for the battery cells.

[0049] In some embodiments of the present application, the battery further includes: a protective plate, which is arranged on a side of the first heat exchanger away from the box body, the protective plate is connected to the box body, and a protective space is formed between the protective plate and the box body, and the first heat exchanger is located in the protective space.

[0050] In the above technical solution, by setting the protective plate on the side of the first heat exchanger away from the box body, the first heat exchanger can be protected, the probability of the first heat exchanger being damaged by collision with foreign objects can be reduced, and the probability of the first heat exchanger being impacted by foreign objects can be reduced, thereby improving the reliability of the first heat exchanger and further improving the reliability of the battery.

[0051] In some embodiments of the present application, the box body is an integral stamped part and includes a bottom wall and a surrounding wall.

[0052] In the above technical solution, by configuring the box body as an integral stamped part, the bottom and sides of the box body are closed, providing a high degree of sealing. After the first heat exchanger is attached to the outside of the box body, the sealing requirements for the box body can be reduced, which helps to simplify the assembly process and reduce manufacturing costs. In addition, the box body is an integral stamped part, which gives the box body a relatively high structural strength and a low probability of deformation and impact damage, which helps to improve the reliability of the battery. Because the box body is an integral stamped part, the box body has high strength and a relatively thin wall thickness, which can reduce the weight of the box body and increase the energy density per unit volume of the battery.

[0053] In some embodiments of the present application, the first heat exchange element includes a plurality of flat-mouth tubes connected in series, and the inner wall of each flat-mouth tube is surrounded by a first heat exchange channel.

[0054] In the above technical solution, since the tank body is a one-piece stamped part, by configuring the first heat exchange element to include multiple flat-end tubes, the structural arrangement of the first heat exchange element and the tank body can be made more compact, space utilization is more efficient, and this helps reduce the volume of the tank body and increase the volumetric energy density of the battery. Furthermore, the flat-end tubes have good compressive strength, can withstand certain pressures and loads, and provide good pipe protection and structural support, thereby improving the reliability of the first heat exchange element.

[0055] In some embodiments of the present application, the battery further includes: a second heat exchange element, which is located in the box body and is attached to at least one inner wall surface of the box body. The structure of the second heat exchange element is the same as or different from that of the first heat exchange element.

[0056] In the above technical solution, the box body can not only exchange heat on one side of the internal battery cell through the first heat exchange element, but also exchange heat on the other side of the battery cell through the second heat exchange element. That is to say, the second heat exchange element and the first heat exchange element can cooperate with each other to exchange heat between the battery cells, thereby being able to exchange heat on more sides of the battery cells, increasing the heat exchange surface of the battery cells, and being conducive to improving the heat exchange efficiency and greatly enhancing the heat exchange effect.

[0057] In some embodiments of the present application, the battery further includes: a third heat exchange element, which is located in the box body and is arranged between any two adjacent battery cells. The structure of the third heat exchange element is the same as or different from that of the first heat exchange element.

[0058] In the above technical solution, the first heat exchange element can perform heat exchange on the side surfaces of multiple battery cells in the box body located on the same side, while the third heat exchange element can perform heat exchange on the other side surface between two adjacent battery cells. As a result, the third heat exchange element and the first heat exchange element cooperate with each other to perform heat exchange on the two surfaces of the battery cell, thereby being able to perform heat exchange on more side surfaces of the battery cell, increasing the heat exchange surface of the battery cell, which is beneficial to improving the heat exchange efficiency and greatly enhancing the heat exchange effect.

[0059] In a second aspect, an embodiment of the present application provides an electrical device comprising the battery described above.

[0060] In the above technical solution, since the connection reliability between the first heat exchange component and the box body in the battery is relatively high, the probability of separation between the first heat exchange component and the box body is relatively low, so the battery has high heat exchange stability and can improve the power reliability of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0062] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0063] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0064] FIG3 is a schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0065] FIG4 is an exploded view of a battery provided in some embodiments of the present application;

[0066] FIG5 is a position distribution diagram of a first heat exchange element and a plurality of battery cells provided in some embodiments of the present application;

[0067] FIG6 is a second schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0068] FIG7 is a top view of a battery provided in some embodiments of the present application;

[0069] FIG8 is a cross-sectional view taken along line AA of FIG7;

[0070] FIG9 is a partial enlarged schematic diagram of point I in FIG8;

[0071] FIG10 is a second exploded view of a battery provided in some embodiments of the present application;

[0072] FIG11 is a schematic diagram of the internal structure of a battery provided in some embodiments of the present application;

[0073] FIG12 is a partial enlarged schematic diagram of point II in FIG11;

[0074] FIG13 is a third schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0075] FIG14 is a third exploded view of a battery provided in some embodiments of the present application.

[0076] Icons: 1000, vehicle; 1, battery; 100, first heat exchange element; 100b, second top surface; 100d, edge; 10, first heat exchange channel; 11, first heat exchange section; 111, first heat exchange portion; 112, first bend; 12, second heat exchange section; 120, U-shaped area; 121, second heat exchange portion; 122, third heat exchange portion; 123, second bend; 124, third bend; 125, fourth heat exchange portion; 126, sixth bend; 13, third heat exchange section; 14, fourth bend; 15, first inlet / outlet section; 17, second inlet / outlet section; 18, seventh bend; 200, box body; 200a, third chamber; 200b, bottom wall; 200c, surrounding wall; 201, first box body; 202, second box body; 21, accommodating chamber; 22, box body; 22a, first opening; 22b, second opening; 23, bottom plate; 24, top plate; 25, fixing member; 251, first fixing member; 252, second fixing member; 27, guard plate; 28, filler; 28a, first top surface; 28b, mounting groove; 29, adhesive member; 200b, bottom wall; 200c, surrounding wall; 2011, first box wall; 2011a, first groove; 2012, protrusion; 102, battery cell; 103, beam; 103a, second groove; 300, second heat exchange element; 400, third heat exchange element; 2. Controller; 3. Motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0077] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0078] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0079] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0080] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0081] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0082] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0083] The term "plurality" used in this application refers to two or more (including two).

[0084] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0085] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or battery pack. A battery generally includes a box body that encloses one or more battery cells or multiple battery modules. The box body prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0086] A battery cell includes a casing, an electrode assembly, and an electrolyte. The casing is used to hold the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The uncoated negative current collector protrudes from the coated negative current collector. The uncoated negative current collector serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure high current flow without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0087] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0088] New energy vehicles have experienced rapid growth in recent years. Within the electric vehicle sector, power batteries, as the power source, play an irreplaceable and crucial role. A battery consists of a housing and multiple cells housed within it. As a core component in new energy vehicles, batteries are subject to stringent requirements in terms of both safety and cycle life.

[0089] To improve battery safety, conventional batteries typically incorporate a cold plate to dissipate heat. The cold plate is connected to the battery's main body, typically by bonding. However, due to process constraints, the connection between the cold plate's edge (100d) and the battery's main body presents a high risk of debonding or loose adhesive bonding, impacting the reliability of the connection between the cold plate and the battery, which in turn affects the battery's heat transfer efficiency and, ultimately, its reliability.

[0090] Based on the above considerations, and to address the issue of unreliable bonding between the cold plate edge 100d and the box body due to the bonding process, which in turn affects battery reliability, the inventors designed a battery comprising: a box body, battery cells, a first heat exchange element, and a fixing element. The battery cells are disposed within the box body; the first heat exchange element is attached to the outside of the box body; and the fixing element is disposed within the box body, adjacent to at least one edge of the first heat exchange element, and securely connects the first heat exchange element to the box body.

[0091] In a battery of this structure, the fixing part can be arranged close to at least one edge of the first heat exchanger, thereby fixing at least one edge of the first heat exchanger to the box body, thereby improving the connection reliability between the edge of the first heat exchanger and the box body, thereby improving the connection firmness between the first heat exchanger as a whole and the box body, which is beneficial to improving the heat exchange stability of the first heat exchanger as a whole to the battery, thereby improving the reliability of the battery.

[0092] The battery disclosed in the embodiments of the present application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery disclosed in the present application can be used to form the electrical device, which is beneficial to expand the scope of application of the battery.

[0093] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0094] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0095] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1 is provided inside the vehicle 1000, and the battery 1 can be provided at the bottom, head or tail of the vehicle 1000. The battery 1 can be used to power the vehicle 1000. For example, the battery 1 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 2 and a motor 3. The controller 2 is used to control the battery 1 to power the motor 3, for example, for starting, navigating and driving the vehicle 1000.

[0096] In some embodiments of the present application, the battery 1 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0097] Please refer to Figure 2, which is an exploded view of the structure of the battery 1 provided in some embodiments of the present application. The battery 1 includes a box body 200 and a plurality of battery cells 102, which are used to be accommodated in the box body 200. The box body 200 is used to provide an assembly space for the battery cells 102, and the box body 200 can adopt a variety of structures. In some embodiments, the box body 200 can include a first box body 201 and a second box body 202, which cover each other and together define an assembly space for accommodating the battery cells 102. The second box body 202 can be a hollow structure with one end open, and the first box body 201 can be a plate-like structure, with the first box body 201 covering the open side of the second box body 202, so that the first box body 201 and the second box body 202 jointly define an assembly space; the first box body 201 and the second box body 202 can also be hollow structures with one end open, with the open side of the first box body 201 covering the open side of the second box body 202. Of course, the box body 200 formed by the first box body 201 and the second box body 202 can be of various shapes, such as a cylinder, a cuboid, etc.

[0098] In the battery 1, the multiple battery cells 102 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 102. The multiple battery cells 102 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 102 can be housed within the box body 200. Alternatively, the battery 1 can be constructed by first connecting multiple battery cells 102 in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a single unit housed within the box body 200. The battery 1 can also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 102.

[0099] Please refer to Figure 2, which is a schematic diagram of a partial structure of a battery 1 provided in some embodiments of the present application. Battery 1 includes multiple rows of battery cells 102, which are arranged along the length of a box body 200, with each row of battery cells 102 including multiple battery cells 102 arranged along the width of the box body 200; alternatively, multiple rows of battery cells 102 are arranged along the width of the box body 200, with each row of battery cells 102 including multiple battery cells 102 arranged along the length of the box body 200.

[0100] Each battery cell 102 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 102 can be cylindrical, flat, rectangular, or in other shapes. For example, in FIG2 , the battery cell 102 is in the shape of a rectangular parallelepiped.

[0101] First, referring to Figures 3 and 4 , embodiments of the present application provide a battery 1 comprising: a housing 200, battery cells 102, a first heat exchange element 100, and a fixing element 25. The battery cells 102 are disposed within the housing 200; the first heat exchange element 100 is attached to the exterior of the housing 200; and the fixing element 25 is disposed within the housing 200, proximate to at least one edge 100d of the first heat exchange element 100, and securely connects the first heat exchange element 100 to the housing 200.

[0102] The box body 200 may refer to a housing or chassis that contains and protects internal components. The box body 200 may be made of, but not limited to, metal, plastic, wood, or other materials. The shape of the box body 200 may be, but not limited to, a cube, a cuboid, a cylinder, or the like.

[0103] The first heat exchange element 100 may refer to a device or component used to transfer heat during a heat exchange process. The first heat exchange element 100 is typically used to transfer heat from one medium to another, achieving heat transfer and utilization. The shape of the first heat exchange element 100 may include, but is not limited to, rectangular, circular, triangular, trapezoidal, or other irregular shapes. For example, the first heat exchange element 100 may include, but is not limited to, a radiator, a cold plate, or the like.

[0104] The “edge 100d” may refer to a boundary or edge of the peripheral contour of the first heat exchange element 100. For example, when the first heat exchange element 100 is rectangular, the edge 100d may refer to the four sides of the first heat exchange element 100 forming the rectangle.

[0105] The fixing member 25 may refer to a part, component, or device used to connect the first heat exchange element 100 and the box body 200. The fixing member 25 may be, but is not limited to, a mounting bracket or a hook, etc., wherein the fixing member 25 and the box body 200 may be connected by, but is not limited to, welding, gluing, riveting, and snap connection, etc.

[0106] For example, when the fixing member 25 is a mounting bracket, the first heat exchanger 100 can be fixed to the mounting bracket by bolting through a support plate; when the fixing member 25 is a hook, the first heat exchanger 100 can be directly connected to the hook.

[0107] In the above scheme, "the first heat exchanger 100 is fitted on the outside of the box body 200" can be understood as that the first heat exchanger 100 is arranged on the outside of the box body 200. Among them, the first heat exchanger 100 can be fitted on any one of the top wall, bottom wall and peripheral side wall of the box body 200. The peripheral side wall referred to here can refer to a plurality of side walls that surround the peripheral wall of the box body 200, and the number of side walls can be but is not limited to three, four, five, etc. For example, when the box body 200 is a rectangular parallelepiped, the peripheral side wall can include four side walls. For example, referring to Figure 3, the first heat exchanger 100 can be fitted on the outside of the bottom wall of the box body 200.

[0108] The first heat exchange element 100 can be bonded to the wall of the box body 200 by glue, and at least one edge 100d of the first heat exchange element 100 can be fixed to the box body 200 by a fixing member 25. Referring to Figure 3, the first heat exchange element 100 can be rectangular in shape and have four edges 100d, which are respectively located at the ends of the first direction X and the ends of the second direction Y of the first heat exchange element 100. The fixing member 25 can be provided corresponding to one or more of the four edges 100d.

[0109] For example, referring to FIG. 3 , fixing members 25 may be provided at edges 100 d at both ends of the first heat exchange member 100 in the second direction Y. The fixing members 25 fix the portion of the first heat exchange member 100 close to the edge 100 d to the box body 200 .

[0110] In the above technical solution, the fixing part 25 can be arranged close to at least one edge 100d of the first heat exchange part 100, thereby fixing at least one edge 100d of the first heat exchange part 100 to the box body 200, thereby improving the connection reliability between the area where the edge 100d of the first heat exchange part 100 is located and the box body 200, thereby improving the connection firmness between the first heat exchange part 100 and the box body 200, which is beneficial to improving the overall heat exchange stability of the first heat exchange part 100 to the battery 1, thereby improving the reliability of the battery 1.

[0111] In some embodiments of the present application, referring to Figures 3 to 5 , a first heat exchange element 100 includes a first heat exchange channel 10, which includes a first heat exchange section 11 and a second heat exchange section 12. The second heat exchange section 12 is bent to form a U-shaped region 120, and the first heat exchange section 11 is bent and disposed within the U-shaped region 120 and is connected to the second heat exchange section 12. A fixing member 25 is connected to the first and second heat exchange sections 11, 12 and is disposed near or corresponding to the bent portions of the first and second heat exchange sections 11, 12.

[0112] Specifically, the battery 1 may include multiple battery cells 102 , and the first heat exchange channel 10 is used to exchange heat with the multiple battery cells 102 of the battery 1 , so that the temperature of the battery 1 can be limited to a safe operating temperature, thereby ensuring the operating reliability of the battery 1 .

[0113] Among them, the above-mentioned "the second heat exchange section 12 is bent to form a U-shaped area 120 (see the dotted line in Figure 5), and the first heat exchange section 11 is bent and arranged in the U-shaped area 120" is intended to illustrate that the second heat exchange section 12 is arranged on the circumferential periphery of the first heat exchange section 11, and can be arranged on the three circumferential sides of the first heat exchange section 11. The second heat exchange section 12 can be arranged closer to the peripheral position of the battery 1 relative to the first heat exchange section 11.

[0114] The second heat exchange section 12 is bent to form a U-shaped area 120 , that is, in the direction from one end of the second heat exchange section 12 toward the other end, the second heat exchange section 12 extends along the U-shaped line to form the U-shaped area 120 .

[0115] The first heat exchange section 11 is bent and arranged in the U-shaped area 120, that is, the first heat exchange section 11 is arranged in the space enclosed by the second heat exchange section 12, and the first heat exchange section 11 extends along a non-straight line on the inner side of the second heat exchange section 12 and has at least one bending position.

[0116] It should be noted that this embodiment only limits the first heat exchange section 11 to being bent and disposed within the U-shaped region 120, and does not limit the bending form of the first heat exchange section 11. That is, the specific bending form of the first heat exchange section 11 can be designed according to the heat exchange requirements of the battery 1. For example, the first heat exchange section 11 can extend along the length direction of the battery cell 102 (i.e., the first direction X in FIG. 5 ), and after extending to a certain length, bend toward the width direction of the battery cell 102 (i.e., the second direction Y in FIG. 5 ), and then continue to extend along the length direction of the battery cell 102 and bend along the width direction. Alternatively, the first heat exchange section 11 can extend along the width direction of the battery cell 102, and after extending to a certain length, bend toward the length direction of the battery cell 102, and then continue to extend along the width direction of the battery cell 102 and bend along the length direction.

[0117] The first heat exchange section 11 and the second heat exchange section 12 are connected in a bent manner, that is, one end of the first heat exchange section 11 is connected to one end of the second heat exchange section 12, and the connection position between the first heat exchange section 11 and the second heat exchange section 12 is a bent non-linear structure. For example, the connection position between the first heat exchange section 11 and the second heat exchange section 12 can be bent into an arc segment.

[0118] Among them, the first heat exchange section 11 and the second heat exchange section 12 are connected, so that one of the end of the first heat exchange section 11 away from the second heat exchange section 12 and the end of the second heat exchange section 12 away from the first heat exchange section 11 can be used as the liquid inlet end and the other can be used as the liquid outlet end. Therefore, when the first heat exchange channel 10 is exchanging heat, the heat exchange medium can flow from the first heat exchange section 11 to the second heat exchange section 12, or from the second heat exchange section 12 to the first heat exchange section 11.

[0119] It is understandable that as the heat exchange fluid flows through the first heat exchange channel 10, the temperature of the heat exchange fluid gradually changes, resulting in a gradual decrease in the heat exchange effect. For example, when the first heat exchange element 100 cools and dissipates heat from the battery 1, the heat from the battery cell 102 is gradually transferred to the heat exchange fluid, causing the temperature of the heat exchange fluid to gradually increase as it flows along the first heat exchange channel 10, the temperature difference between the heat exchange fluid and the battery cell 102 gradually decreases, and the heat exchange efficiency gradually decreases. When the first heat exchange element 100 heats and raises the temperature of the battery 1, the heat in the heat exchange fluid is gradually transferred to the battery cell 102, causing the temperature of the heat exchange fluid to gradually decrease as it flows along the first heat exchange channel 10, the temperature difference between the heat exchange fluid and the battery cell 102 gradually decreases, and the heat exchange efficiency gradually decreases.

[0120] In this embodiment, when the first heat exchange element 100 is dissipating heat and cooling the battery 1, the heat exchange fluid can also flow from the first heat exchange section 11 to the second heat exchange section 12, but the heat exchange fluid can also flow from the second heat exchange section 12 to the first heat exchange section 11. When the heat exchange fluid also flows from the first heat exchange section 11 to the second heat exchange section 12, the battery cells 102 in the middle of the battery 1 (that is, the internal battery cells 102 on the inner side of the periphery) can be cooled first, and then the battery cells 102 at the peripheral edge of the battery 1 can be cooled. Since the heat dissipation of the battery cells 102 at the peripheral edge of the battery 1 is better than that of the internal battery cells 102, the heat exchange fluid with a lower temperature in the first heat exchange section 11 can better meet the heat dissipation requirements of the battery cells 102 in the middle of the battery 1. At the same time, since the battery cells 102 at the peripheral position can dissipate heat naturally directly to the external environment, when the temperature of the heat exchange fluid in the second heat exchange section 12 is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 102, so that the cooling effects obtained by the battery cells 102 at the peripheral position of the battery 1 and the battery cells 102 at the middle position of the battery 1 are roughly the same, and then the temperatures of the battery cells 102 at the peripheral position of the battery 1 and the battery cells 102 at the middle position of the battery 1 after cooling and heat dissipation are relatively consistent, making the temperature distribution in the battery 1 more uniform.

[0121] When the first heat exchange element 100 heats the battery 1, the heat exchange fluid may also flow from the first heat exchange section 11 to the second heat exchange section 12, but the heat exchange fluid may also flow from the second heat exchange section 12 to the first heat exchange section 11. For example, when the heat exchange fluid flows from the second heat exchange section 12 to the first heat exchange section 11, the battery cells 102 at the periphery of the battery 1 may be heated first, and then the heat exchange fluid may cool the battery cells 102 at the middle of the battery 1. Since the battery cells 102 at the periphery of the battery 1 dissipate more heat to the external environment, the temperature of the battery cells 102 at the periphery of the battery 1 is more likely to drop. The heat exchange fluid first heats the battery cells 102 at the periphery of the battery 1. The higher temperature heat exchange fluid may increase the temperature of the battery cells 102 at the periphery while compensating for the heat lost by the battery cells 102 due to heat dissipation to the external environment. The amount of heat generated by the battery cells 102 themselves can meet their heating needs. The battery cells 102 in the middle of the battery 1 have less contact area with the external environment and less heat loss. The lower temperature heat exchange fluid flowing in the first heat exchange section 11 can cooperate with the heat generated by the battery cells 102 themselves to well meet their heating needs. As a result, the battery cells 102 at the periphery of the battery 1 and the battery cells 102 at the middle of the battery 1 can obtain basically the same heating effect, thereby making the temperatures of the battery cells 102 at the periphery of the battery 1 and the battery cells 102 at the middle of the battery 1 more consistent after heating, making the temperature distribution in the battery 1 more uniform.

[0122] Since the first heat exchange section 11 and the second heat exchange section 12 are bent structures, the bent parts of the first heat exchange section 11 and the second heat exchange section 12 can refer to the edge positions of the first heat exchange section 11 and the second heat exchange section 12, and since the first heat exchange section 11 and the second heat exchange section 12 are usually connected to the box body 200 by bonding, affected by the bonding process, the outer sides of the bent parts of the first heat exchange section 11 and the second heat exchange section 12 are less constrained than the center side areas of the first heat exchange section 11 and the second heat exchange section 12, and the probability of debonding or loose bonding is relatively high. In the present application, the fixing member 25 can be connected to the bent portion of the first heat exchange section 11 and the second heat exchange section 12, or be arranged near the bent portion of the first heat exchange section 11 and the second heat exchange section 12, so that the fixing member 25 can increase the restraining and limiting effect on the bent portion of the first heat exchange section 11 and the second heat exchange section 12, thereby reducing the probability of debonding or loose compression between the bent portion of the first heat exchange section 11 and the second heat exchange section 12 and the box body 200, thereby improving the heat exchange reliability of the first heat exchange section 11 and the second heat exchange section 12, and thereby improving the reliability of the battery 1.

[0123] In the above technical solution, the second heat exchange section 12 is bent to form a U-shaped area 120, and the first heat exchange section 11 is bent and arranged in the U-shaped area 120. When the first heat exchange component 100 exchanges heat with the battery 1, the U-shaped area 120 formed by the outer second heat exchange section 12 can be opposite to the outer battery cell 102 of the battery 1, and the first heat exchange section 11 in the U-shaped area 120 can be opposite to the internal battery cell 102, so that the first heat exchange component 100 can compensate for the internal and external temperature difference caused by the heat exchange between the outer battery cell 102 and the environment, so that the heat exchange effect of the battery cell 102 outside the battery 1 and the battery cell 102 inside the battery 1 tend to be consistent, thereby improving the temperature uniformity of the battery 1, thereby improving the service life of the battery 1 to a certain extent. The fixing part 25 can play a restraining and limiting role on the area where the bent parts of the first heat exchange section 11 and the second heat exchange section 12 are located, thereby improving the connection reliability between the bent parts of the first heat exchange section 11 and the second heat exchange section 12 and the box body 200, and further improving the working reliability of the first heat exchange section 11 and the second heat exchange section 12, which is beneficial to improving the reliability of the battery 1.

[0124] According to some embodiments of the present application, as shown in FIG. 5 , the second heat exchange section 12 may be located at the outermost side of the first heat exchange channel 10 in the circumferential direction.

[0125] That is to say, the second heat exchange section 12 is formed as the outermost flow channel of the first heat exchange channel 10. In this way, the second heat exchange section 12 can be used to exchange heat with the battery cells 102 around the battery 1, thereby improving the temperature uniformity of the battery cells 102 around the battery 1.

[0126] In the above technical solution, by arranging the second heat exchange section 12 at the outermost side of the circumference of the first heat exchange channel 10, the second heat exchange section 12 can exchange heat with the battery cells 102 on the outer circumference of the battery 1, which is beneficial to improving the temperature difference between the inside and outside of the battery 1 caused by heat exchange with the environment, and to a certain extent, improve the service life of the battery 1.

[0127] According to some embodiments of the present application, the first heat exchange section 11 and the second heat exchange section 12 can be bent in the same plane.

[0128] In the above technical solution, by setting the first heat exchange section 11 and the second heat exchange section 12 to bend in the same plane, the first heat exchange channel 10 can exchange heat with the battery 1 in the same plane. As a result, the structure of the first heat exchange channel 10 can be simplified, the production difficulty of the first heat exchange channel 10 can be reduced, and at the same time, the space occupied by the first heat exchange channel 10 can be reduced, thereby improving the volume energy density of the battery 1.

[0129] In some embodiments of the present application, referring to Figures 3 and 5, the first heat exchange section 11 includes: a first heat exchange portion 111 and a first bending portion 112, there are multiple first heat exchange portions 111, and the multiple first heat exchange portions 111 are arranged at intervals in the first direction X and are sequentially connected through the first bending portions 112, each first heat exchange portion 111 extends along the second direction Y, the second direction Y is arranged at an angle to the first direction X, and the first bending portion 112 is arc-shaped; the fixing member 25 is connected to the first bending portion 112 or the portion of the first heat exchange portion 111 close to the first bending portion 112.

[0130] That is, the plurality of first heat exchange sections 111 are sequentially connected, and the connection between two connected first heat exchange sections 111 is bent. For example, the two connected first heat exchange sections 111 can be bent along a fold line or an arc. The number of first heat exchange sections 111 can be two, three, four, five, or more.

[0131] It should be noted that the first heat exchange portion 111 can have various shapes. For example, the first heat exchange portion 111 can be linear or curved. The first heat exchange portion 111 can also extend in various directions. For example, it can extend along the length or thickness of the battery cell 102. In this way, multiple first heat exchange portions 111 are connected in a series of bends, allowing the first heat exchange section 11 to form an S-shaped, X-shaped, or V-shaped heat exchange channel.

[0132] In the above technical solution, on the one hand, by setting up multiple first heat exchange parts 111, the heat exchange area of ​​the first heat exchange section 11 can be increased, and then the heat exchange area of ​​the first heat exchange channel 10 can be increased, thereby improving the heat exchange effect of the first heat exchange channel 10; on the other hand, since the internal battery cells are wrapped by the external battery cells, the temperature difference between the internal battery cells is not large. Therefore, by setting up multiple first heat exchange parts 111, the overall heat exchange effect can be guaranteed while ensuring that the temperature difference between the internal and external battery cells is small.

[0133] The phrase "the first direction X and the second direction Y are arranged at an angle" is intended to illustrate that the first direction X and the second direction Y can be arranged perpendicularly or intersectingly, but not perpendicularly. For example, the first direction X and the second direction Y can be arranged at an angle of 30°, 60°, 80°, 120°, 150°, or 170°. For example, as shown in FIG5 , the first direction X is the length direction of the battery cell 102, and the second direction Y is the thickness direction of the battery cell 102. The first heat exchange portions 111 extend along the length direction of the battery cell 102 and are spaced apart along the thickness direction of the battery cell 102. In this way, multiple first heat exchange portions 111 are connected by bending to form an S-shaped heat exchange channel, enabling heat exchange between multiple battery cells 102.

[0134] The first bend 112 is arc-shaped, that is, the first bend 112 extends along an arc, and the fluid flow directions at both ends of the first bend 112 form a certain angle. As a result, the first bend 112 can change the flow direction of the fluid, thereby allowing the two connected first heat exchange sections 111 to be extended and arranged within a predetermined area, thereby increasing the heat exchange area of ​​the first heat exchange section 11 and improving the heat exchange efficiency of the first heat exchange section 11. At the same time, the first bend 112 is arc-shaped, wherein the arc shape can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further improving the heat exchange efficiency of the first heat exchange section 11.

[0135] Furthermore, the number of the first bends 112 can be one, two, three or more. The first bends 112 can make the first heat exchange section 11 arranged in a circuitous manner, thereby increasing the heat exchange area of ​​the first heat exchange channel 10 and improving the heat exchange efficiency of the first heat exchange channel 10.

[0136] Optionally, referring to FIG. 3 and FIG. 5 , the first bending portion 112 may be in a semicircular arc shape.

[0137] That is to say, the first bend portion 112 can extend along a semicircular arc line. Specifically, the first bend portion 112 can extend along a semicircular arc line that is raised in the direction away from the two first heat exchange portions 111 connected by the first bend portion 112. The angle between the inlet and outlet of the first bend portion 112 is 180°, and the flow directions at the outlet and inlet positions of the first bend portion 112 are opposite, so that the two adjacent first heat exchange portions 111 are closer together, and the structure of the entire first heat exchange section 11 is more compact and reliable. Among them, the first bend portion 112 is used to connect two first heat exchange portions 111 that are parallel to each other and arranged at intervals. In other embodiments, the bending degree of the first bend portion 112 can also be adjusted according to needs, for example, it can be 150°, 135°, etc., and the embodiments of the present application are not limited thereto.

[0138] The two first heat exchange parts 111 are connected through the first bending part 112 to form a "U"-shaped heat exchange channel. The first heat exchange section 11 can include one or more "U"-shaped heat exchange channels. Multiple "U"-shaped heat exchange channels are connected in sequence, and the connected "U"-shaped heat exchange channels are connected through the first bending part 112.

[0139] In the above embodiment, by setting the first bending portion 112 to be semicircular, the design diversity of the heat exchange channel can be increased, thereby improving the compatibility of the first heat exchange element 100 with the battery 1; at the same time, the semicircular structure is relatively simple, thereby reducing the production difficulty of the first heat exchange element 100 and improving the production speed of the first heat exchange element 100.

[0140] The fixing part 25 can be connected to the first bending part 112, or it can be connected to the part of the first heat exchange part 111 close to the first bending part 112. Regardless of which of the above methods is used, the fixing part 25 can fix the first heat exchange part 111 on the box body 200, thereby improving the reliability of the first heat exchange part 111 and the first bending part 112, which is beneficial to the smooth flow of the heat exchange fluid in the first heat exchange part 111 and the first bending part 112.

[0141] In the above technical solution, by arranging the first heat exchange portion 111 to extend linearly along the second direction Y, the difficulty of producing the first heat exchange portion 111 can be reduced, thereby reducing the complexity of producing the first heat exchange channel 10. At the same time, the straight tube can also increase the flow rate of the heat exchange fluid, thereby improving the heat exchange effect of the first heat exchange channel 10. By providing the first bend 112, the flow direction of the fluid inside the first heat exchange section 11 can be changed, achieving a smooth transition between the two first heat exchange portions 111 and a circuitous extension of the first heat exchange channel 10. As a result, the contact area between the single battery cell 102 and the first heat exchange channel 10 can be increased, thereby increasing the heat exchange area and improving the heat exchange efficiency of the first heat exchange channel 10. At the same time, the arc-shaped first bend 112 can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further improving the heat exchange efficiency of the first heat exchange section 11. Furthermore, the provision of the first bent portion 112 makes the structure of the first heat exchange section 11 more compact, occupying a smaller overall space, further facilitating the miniaturization of the battery 1 and ensuring the volumetric energy density of the battery 1. Connecting the first bent portion 112 or the portion of the first heat exchange section 111 near the first bent portion 112 via the fixing member 25 improves the reliability of the first heat exchange section 111 and the first bent portion 112, thereby increasing the heat exchange stability of the battery cell 102 and thereby facilitating improved reliability of the battery 1.

[0142] In some embodiments of the present application, referring to Figures 3 and 5, there are multiple fixing members 25, and they are at least arranged on both sides of the first heat exchange section 11 along the second direction Y. Each fixing member 25 extends along the first direction X and connects at least one adjacent first bending portion 112 and / or the portion of the first heat exchange portion 111 close to the first bending portion 112.

[0143] The number of the fixing members 25 may be, but is not limited to, two, three, four, five, and the like. Among the multiple fixing members 25, at least two are respectively disposed on both sides of the first heat exchange section 11 along the second direction Y. This allows the first heat exchange section 11 to be fixed on both sides in the second direction Y, making the fixation between the first heat exchange section 11 and the box body 200 more reliable, and facilitating improved heat exchange stability between the first heat exchange section 11 and the battery cells 102.

[0144] For example, the second direction Y may refer to the longitudinal direction of the first heat exchange section 11. Thus, fixing members 25 may be provided at both ends of the longitudinal direction of the first heat exchange section 11, thereby improving the connection reliability between the first heat exchange section 11 and the box body 200. The number of fixing members 25 may also be three or more, that is, the fixing members 25 may be provided not only at both ends of the longitudinal direction of the first heat exchange section 11, but also in the middle of the first heat exchange section 11, thereby further improving the connection reliability between the first heat exchange section 11 and the box body 200.

[0145] The fixing member 25 extends along the first direction X, and the fixing member 25 is an elongated strip. Since the first heat exchange section 11 includes a first bending portion 112 and multiple first heat exchange portions 111, and two adjacent first heat exchange portions 111 are connected by the first bending portion 112, and the first heat exchange portions 111 extend along the second direction Y, each fixing member 25 can simultaneously fix multiple first heat exchange portions 111, which can reduce the number of fixing members 25, reduce the difficulty of assembly, and improve assembly efficiency.

[0146] Among them, the fixing part 25 can be connected to one or more first bending parts 112 at adjacent positions; the fixing part 25 can also be connected to one or more first heat exchange parts 111 close to the first bending part 112; the fixing part 25 can also be connected to multiple first bending parts 112 and several of the parts of multiple first heat exchange parts 111 close to the first bending part 112.

[0147] In the above technical solution, by providing multiple fixing members 25, and by disposing multiple fixing members 25 on at least two sides of the first heat exchange section 11 along the second direction Y, the fixing position of the first heat exchange section 11 and the box body 200 can be increased, thereby improving the reliability of the connection between the first heat exchange section 11 and the box body 200, reducing the probability of separation or loose glue between the first heat exchange section 11 and the box body 200, and further improving the overall reliability of the battery 1. The fixing members 25 extend along the first direction X and connect at least one adjacent first bend portion 112 and / or the portion of the first heat exchange section 111 near the first bend portion 112. In this way, each fixing member 25 can simultaneously fix multiple first heat exchange sections 111, which can reduce the number of fixing members 25, reduce the number of assembly steps, improve assembly efficiency, and facilitate shortening the production time of the battery 1.

[0148] In some embodiments of the present application, referring to Figures 3 and 5, the second heat exchange section 12 includes: a second heat exchange portion 121, a third heat exchange portion 122, a fourth heat exchange portion 125, a second bend portion 123 and a third bend portion 124. The second heat exchange portion 121 extends along the first side circumference of the first heat exchange section 11, and the third heat exchange portion 122 is connected between the second heat exchange portion 121 and the first heat exchange section 11, and extends along the second side circumference of the first heat exchange section 11. The first end of the third heat exchange portion 122 is connected to the second heat exchange portion 121 at an angle to the first heat exchange portion 121. The second end of the third heat exchange section 122 is connected to the first heat exchange section 11 at an angle. The fourth heat exchange section 125 is in communication with the second heat exchange section 121 and is connected to the second heat exchange section 121 at an angle, extending along the third side periphery of the first heat exchange section 11. The second bend 123 and the third bend 124 are both arc-shaped. The second bend 123 is connected between the first end of the third heat exchange section 122 and the second heat exchange section 121, and the third bend 124 is connected between the second end of the third heat exchange section 122 and the first heat exchange section 11. The fixing member 25 is connected to the second bend 123 or the portion of the second heat exchange section 121 near the second bend 123; the fixing member 25 is connected to the third bend 124 or the portion of the first heat exchange section 11 near the third bend 124.

[0149] It can be understood that the fourth heat exchange part 125 is connected to the end of the second heat exchange part 121 away from the third heat exchange part 122, the fourth heat exchange part 125, the second heat exchange part 121 and the third heat exchange part 122 are connected in sequence to form a U-shaped area 120, and the first heat exchange section 11 is arranged in the U-shaped area 120 and is connected to the end of the third heat exchange part 122 away from the second heat exchange part 121.

[0150] The first end of the third heat exchange portion 122 is connected to the second heat exchange portion 121 at an angle. That is, the third heat exchange portion 122 is connected to the second heat exchange portion 121, and the third heat exchange portion 122 and the second heat exchange portion 121 are not collinear or parallel, but are arranged at an angle greater than 0° and less than 180°. For example, the third heat exchange portion 122 and the second heat exchange portion 121 can be connected at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0151] The second end of the third heat exchange section 122 is connected to the first heat exchange section 11 at an angle; that is, the second end of the third heat exchange section 122 is connected to the second heat exchange section 121, and the second end of the third heat exchange section 122 is arranged at an angle greater than 0° and less than 180° to the first heat exchange section 11. For example, the second end of the third heat exchange section 122 can be connected to the first heat exchange section 11 at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, and so on.

[0152] The fourth heat exchange portion 125 is in communication with the second heat exchange portion 121 and is connected to the second heat exchange portion 121 at an angle. That is, the fourth heat exchange portion 125 is connected to the second heat exchange portion 121 at an angle greater than 0° and less than 180°. For example, the fourth heat exchange portion 125 is connected to the second heat exchange portion 121 at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0153] It should be noted that this embodiment limits the second heat exchange section 12 to be arranged on three sides of the circumference of the first heat exchange section 11, and does not limit the specific positions of the second heat exchange section 121, the third heat exchange section 122 and the fourth heat exchange section 125 relative to the first heat exchange section 11. Therefore, the specific positions of the second heat exchange section 121, the third heat exchange section 122 and the fourth heat exchange section 125 can be designed according to actual conditions. For example, if the second heat exchange section 121 can be arranged on one side of the first heat exchange section 11 in the first direction, the third heat exchange section 122 and the fourth heat exchange section 125 are respectively arranged on both sides of the first heat exchange section 11 in the second direction; if the second heat exchange section 121 is arranged on one side of the first heat exchange section 11 in the second direction, the third heat exchange section 122 and the fourth heat exchange section 125 are respectively arranged on both sides of the first heat exchange section 11 in the first direction.

[0154] The second bending portion 123 and the third bending portion 124 are used to connect the second heat exchange portion 121 and the third heat exchange portion 122 and the third heat exchange portion 122 and the first heat exchange portion 111, respectively. The second bending portion 123 is arc-shaped, that is, the second bending portion 123 extends along the arc line, and the fluid flow directions at both ends of the second bending portion 123 have a certain angle. The third bending portion 124 is arc-shaped, that is, the third bending portion 124 extends along the arc line, and the fluid flow directions at both ends of the third bending portion 124 have a certain angle.

[0155] Thus, the second bend 123 and the third bend 124 can change the flow direction of the heat exchange fluid, allowing the second heat exchange section 12 to extend within a predetermined area and be used for heat exchange with the battery cell 102. At the same time, the curved second bend 123 and the third bend 124 can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further improving the heat exchange efficiency of the first heat exchange channel 10.

[0156] In the above embodiment, by setting the second bend portion 123 and the third bend portion 124, the flow direction of the fluid in the first heat exchange channel 10 can be changed, and a smooth transition between the third heat exchange portion 122 and the second heat exchange portion 121 can be achieved, and a smooth transition between the third heat exchange portion 122 and the first heat exchange portion 111 can be achieved. Therefore, the second bend portion 123 and the third bend portion 124 can reduce the flow resistance of the fluid flow in the second heat exchange section 12, reduce the pressure drop, increase the flow rate of the heat exchange fluid, and further increase the heat exchange efficiency of the first heat exchange channel 10.

[0157] Optionally, referring to FIG. 3 and FIG. 5 , the second bending portion 123 may be in a quarter-circular arc shape.

[0158] In other words, the second bend 123 can extend along a semicircular arc. Specifically, the first bend 112 can extend along a quarter-circular arc away from the protrusion of the first connecting section. The angle between the inlet and outlet of the second bend 123 can be 90°. The second bend 123 is similar to a 90° elbow in pipe materials, which can change the flow direction of the fluid, causing the fluid flow direction to change by 90° after passing through the second bend 123.

[0159] Furthermore, the second bending portion 123 connects the second heat exchange portion 121 and the third heat exchange portion 122 . At this time, the second heat exchange portion 121 and the third heat exchange portion 122 are arranged perpendicular to each other.

[0160] Optionally, the second bend 123 can also be semicircular in shape. That is, the second bend 123 can extend along a semicircular arc, with the angle between the inlet and outlet of the second bend 123 being 180°, and the flow directions at the outlet and inlet of the second bend 123 being opposite. This brings the third heat exchange section 122 and the second heat exchange section 121 closer together, making the structure of the entire second heat exchange section 12 more compact and reliable. In other embodiments, the degree of curvature of the second bend 123 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of this application are not limited thereto.

[0161] The closer they are, the more compact and reliable the structure of the entire first heat exchange section 11 is. The first bend 112 is used to connect two first heat exchange sections 111 that are arranged parallel to each other and spaced apart. In other embodiments, the degree of bend of the first bend 112 can be adjusted as needed, for example, to 150°, 135°, etc., and this is not limited to the embodiments of the present application.

[0162] Optionally, referring to FIG. 3 and FIG. 5 , the third bending portion 124 is in a quarter-circular arc shape.

[0163] In other words, the third bend 124 can extend along a semicircular arc. Specifically, the third bend 124 can extend along a quarter-circular arc away from the protrusion of the first connecting section. The angle between the inlet and outlet of the third bend 124 is 90°. The third bend 124 is similar to a 90° elbow in pipe materials and can change the flow direction, causing the fluid to change its flow direction by 90° after passing through the third bend 124.

[0164] Furthermore, the third bending portion 124 connects the third heat exchange portion 122 and the first heat exchange portion 111 . At this time, the third heat exchange portion 122 and the first heat exchange portion 111 are arranged perpendicular to each other.

[0165] In the above embodiment, by setting the third bending portion 124 to be a quarter arc shape, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the third bending portion 124; at the same time, the arc-shaped third bending portion 124 can also reduce the resistance to fluid flow, so that the fluid can flow smoothly in the third bending portion 124, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency.

[0166] Optionally, the third bend 124 can also be semicircular in shape. That is, the third bend 124 can extend along a semicircular arc, with the angle between the inlet and outlet of the third bend 124 being 180°, and the flow directions at the outlet and inlet of the third bend 124 being opposite. This brings the third heat exchange section 122 closer to the first heat exchange section 11, making the structures of the first heat exchange section 11 and the second heat exchange section 12 more compact and reliable. In other embodiments, the degree of curvature of the third bend 124 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of this application are not limited thereto.

[0167] The fixing part 25 is connected to the second bending part 123 or the part of the second heat exchange part 121 close to the second bending part 123. It can be understood that the fixing part 25 can be connected to the second bending part 123, or the fixing part 25 can also be connected to the part of the second heat exchange part 121 close to the second bending part 123. Thus, the fixing part 25 can improve the connection reliability between the adjacent areas of the second heat exchange part 121 and the second bending part 123 and the box body 200, thereby improving the stability of the liquid flow in the second heat exchange part 121 and the second bending part 123, and improving the heat exchange reliability of the part where the second heat exchange part 121 and the second bending part 123 are located.

[0168] The fixing member 25 is connected to the third bend 124 or the portion of the first heat exchange section 11 near the third bend 124. It can be understood that the fixing member 25 can be connected to the third bend 124, or the fixing member 25 can also be connected to the portion of the first heat exchange section 11 near the third bend 124. As a result, the fixing member 25 can improve the connection reliability between the adjacent areas of the first heat exchange section 11 and the third bend 124 and the box body 200, thereby improving the stability of the liquid flow in the first heat exchange section 11 and the third bend 124, and improving the heat exchange reliability of the portion where the first heat exchange section 11 and the third bend 124 are located.

[0169] In the above technical solution, by arranging the second heat exchange section 121, the third heat exchange section 122, and the fourth heat exchange section 125 on three sides of the first heat exchange section 11, respectively, the second heat exchange section 12 can surround the first heat exchange section 11, thereby increasing the compactness of the arrangement of the first heat exchange channel 10 and miniaturizing the structure of the first heat exchange channel 10, which is beneficial to ensuring the volume energy density of the battery 1. At the same time, it can also simplify the structure of the first heat exchange channel 10 and facilitate the processing and production of the first heat exchange element 100. By providing the second bend 123, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the second bend 123; at the same time, the arc shape can also reduce the resistance to fluid flow, allowing the fluid to flow smoothly in the second bend 123, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency. The second bending portion 123 or the part of the second heat exchange portion 121 close to the second bending portion 123 is connected by the fixing member 25, and the third bending portion 124 or the part of the first heat exchange section 11 close to the third bending portion 124 is connected by the fixing member 25. In this way, the connection reliability of the adjacent areas of the second bending portion 123 and the second heat exchange portion 121, and the adjacent areas of the third bending portion 124 and the first heat exchange section 11 with the box body 200 can be improved, and the stability of the heat exchange fluid flowing through the second heat exchange portion 121, the second bending portion 123, the third bending portion 124 and the first heat exchange section 11 can be improved, which is beneficial to improving the heat exchange reliability of the first heat exchange member 100 to the battery cell 102, thereby improving the reliability of the battery 1.

[0170] In some embodiments of the present application, referring to Figures 3 and 5, the first heat exchange section 11 includes a plurality of first heat exchange parts 111, which are bent and connected in sequence in the first direction X, and each first heat exchange part 111 extends along the second direction Y, and the second direction Y is arranged at an angle to the first direction X; the first heat exchange channel 10 also includes: a third heat exchange section 13 and a fourth bending portion 14, the third heat exchange section 13 is arranged on the side of the first heat exchange section 11 away from the third heat exchange part 122, the third heat exchange section 13 is connected to the one of the plurality of first heat exchange parts 111 that is closest to the second heat exchange part 121 along the first direction X, the fourth bending portion 14 is arc-shaped, and is connected between the third heat exchange section 13 and the first heat exchange part 111; the fixing member 25 is connected to the fourth bending portion 14 or the portion of the first heat exchange part 111 close to the fourth bending portion 14.

[0171] That is to say, in the first heat exchange channel 10, the second heat exchange section 12, the first heat exchange section 11 and the third heat exchange section 13 are connected in sequence, and the heat exchange fluid can flow from the second heat exchange section 12 to the third heat exchange section 13 through the first heat exchange section 11, or from the third heat exchange section 13 to the second heat exchange section 12 through the first heat exchange section 11.

[0172] The third heat exchange section 13 is connected to the first heat exchange section 11 and is arranged at an angle greater than 0° and less than or equal to 180°. For example, the angle between the third heat exchange section 13 and the first heat exchange section 11 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc.

[0173] The fourth bend 14 is arc-shaped, that is, it extends along an arc, and the fluid flow directions at both ends of the fourth bend 14 form a certain angle. As a result, the fourth bend 14 can change the fluid flow direction, thereby causing the third heat exchange section 13 to extend along a predetermined direction. Furthermore, the arc shape reduces fluid flow resistance and pressure drop, thereby increasing the fluid flow rate and further enhancing the heat exchange efficiency of the first heat exchange channel 10.

[0174] Optionally, the fourth bend 14 can be semicircular. That is, the fourth bend 14 can extend along a semicircular arc, with the angle between the inlet and outlet of the fourth bend 14 being 180°, and the flow directions at the outlet and inlet of the fourth bend 14 being opposite. This brings the third heat exchange section 13 and the first heat exchange section 111 closer together, making the structure of the third heat exchange section 13 and the first heat exchange section 111 more compact and reliable. In other embodiments, the degree of curvature of the fourth bend 14 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of the present application are not limited thereto.

[0175] In the above embodiment, by setting the fourth bend 14, the flow direction of the fluid between the third heat exchange section 13 and the first heat exchange section 111 can be changed. At the same time, the arc-shaped fourth bend 14 can reduce the flow resistance of the fluid, reduce the pressure drop, increase the flow rate of the fluid, and further increase the heat exchange efficiency of the first heat exchange channel 10.

[0176] In some embodiments, referring to FIG. 3 and FIG. 5 , the fourth bent portion 14 is in the shape of a quarter circle.

[0177] That is, the fourth bend 14 can extend along a semicircular arc. Specifically, the fourth bend 14 can extend along a quarter-circular arc that protrudes toward the connection between the second heat exchange portion 121 and the fourth heat exchange portion 125. The angle between the inlet and outlet of the fourth bend 14 is 90°. The fourth bend 14 is similar to a 90° elbow in a pipe material and can change the flow direction, causing the fluid flow direction to change by 90° after passing through the fourth bend 14.

[0178] Furthermore, the fourth bend 14 connects the third heat exchange section 13 and the first heat exchange section 111, and the third heat exchange section 13 and the first heat exchange section 111 can be arranged perpendicular to each other, wherein the first heat exchange section 111 extends along the second direction, and the third heat exchange section 13 extends along the first direction, and the first direction is perpendicular to the second direction.

[0179] The fixing member 25 can be connected to the fourth bend 14, or the fixing member 25 can be connected to the portion of the first heat exchange member 111 near the fourth bend 14. This can provide a restraining and limiting effect on the area where the fourth bend 14 is located, reducing the probability of separation between the fourth bend 14 and the box body 200 or loose glue bonding, improving the stability of the heat exchange fluid flowing through the fourth bend 14, and facilitating the improvement of the working reliability of the first heat exchange member 100, thereby improving the reliability of the battery 1.

[0180] Exemplarily, referring to the foregoing, the second fixing member 252 can simultaneously fix the area around the fifth bending portion 128 and the area around the fourth bending portion 14 .

[0181] In the above technical solution, by providing the third heat exchange section 13, the heat exchange area of ​​the first heat exchange channel 10 can be further increased, thereby further improving the heat exchange effect of the first heat exchange channel 10. By providing the fourth bend 14, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the fourth bend 14; at the same time, the arc shape can also reduce the resistance to fluid flow, so that the fluid can flow smoothly in the fourth bend 14, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency. By providing a fixing part 25 to connect the fourth bend 14 or the part of the first heat exchange part 111 close to the fourth bend 14, the probability of debonding or loose glue between the fourth bend 14 and the box body 200 can be reduced, and the heat exchange reliability between the heat exchange fluid and the battery cell 102 when flowing through the fourth bend 14 can be improved, thereby improving the reliability of the battery 1.

[0182] In some embodiments of the present application, referring to Figures 3 and 5, there are multiple fixing members 25, and they are at least arranged on both sides of the first heat exchange section 11 along the second direction Y, and each fixing member 25 extends along the first direction X; among the multiple fixing members 25, one close to the third heat exchange portion 122 is the first fixing member 251, and the other close to the third heat exchange section 13 is the second fixing member 252. The first fixing member 251 is connected to or arranged close to the second bending portion 123, and is connected to or arranged close to the third bending portion 124, and the second fixing member 252 is connected to or arranged close to the fourth bending portion 14.

[0183] The number of fixing members 25 can be, but is not limited to, two, three, four, five, and so on. For example, there can be two fixing members 25, with the two fixing members 25 being located on either side of the first heat exchange section 11 in the second direction Y. Alternatively, there can be three or more fixing members 25, with two fixing members 25 being located on either side of the first heat exchange section 11 in the second direction Y, and one or more fixing members 25 being located in the middle of the first heat exchange section 11. Thus, by providing multiple fixing members 25, the fixing positions of the first heat exchange section 11 and the box body 200 can be increased, the connection reliability between the first heat exchange section 11 and the box body 200 can be improved, and the probability of separation or loose adhesive bonding between the first heat exchange section 11 and the box body 200 can be reduced, thereby facilitating improved heat exchange reliability of the battery 1.

[0184] Among them, each fixing part 25 extends along the first direction X, that is, each fixing part 25 is in the shape of a long strip, and each fixing part 25 can provide more fixing positions, and can fix multiple positions of the first heat exchange section 11 (refer to the previous text, the first heat exchange section 11 includes multiple first heat exchange parts 111, and each fixing part 25 can be fixedly connected to multiple first heat exchange parts 111). In this way, the number of fixing parts 25 can be reduced, which is conducive to reducing assembly steps and improving assembly efficiency.

[0185] In the above technical solution, among the multiple fixing members 25, the first fixing member 251 can be connected to or arranged near the second bending portion 123, and connected to or arranged near the third bending portion 124, and the second fixing member 252 is connected to or arranged near the fourth bending portion 14, that is, the second bending portion 123 and the third bending portion 124 are located at one end of the first heat exchange section 11 along the second direction Y, and the fourth bending portion 14 is located at the other end of the first heat exchange section 11 along the second direction Y. Therefore, by arranging the first fixing member 251 and the second fixing member 252, the bending portions of the first heat exchange section 11 at both ends of the second direction Y can be fixed respectively, thereby enabling the various bending portions of the first heat exchange member 100 to be better fixed on the box body 200, further improving the connection reliability between the first heat exchange member 100 and the box body 200.

[0186] In some embodiments of the present application, referring to Figures 3 and 5, the first heat exchange channel 10 also includes: a first entrance and exit section 15, one end of the first entrance and exit section 15 is connected to the third heat exchange section 13 at an angle, and the other end of the first entrance and exit section 15 forms a first entrance and exit of the heat exchange channel; the first entrance and exit section 15 extends along the second direction Y in a direction away from the first heat exchange section 11, and the third heat exchange section 13 is extended along the first direction X.

[0187] Among them, the first inlet and outlet are used for the inlet or outlet of the heat exchange fluid. When the first inlet and outlet are used for the inlet of the heat exchange fluid, the first inlet and outlet section 15 is used to transport the heat exchange fluid to the third heat exchange section 13; when the first inlet and outlet are used for the outlet of the heat exchange fluid, the first inlet and outlet section 15 is used to guide the heat exchange fluid after heat exchange into the first heat exchange channel 10 through the first inlet and outlet.

[0188] The first inlet / outlet section 15 is connected to the third heat exchange section 13 at an angle. For example, the first inlet / outlet section 15 is connected to the third heat exchange section 13 and is arranged at an angle greater than 0° and less than or equal to 180°. For example, the angle between the first inlet / outlet section 15 and the third heat exchange section 13 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc.

[0189] It can be understood that a certain angle is formed between the first inlet and outlet section 15 and the third heat exchange section 13, thereby forming a certain space on the side of the third heat exchange section 13 facing the first inlet and outlet section 15, which can be beneficial to the layout of other components in the battery 1.

[0190] In the above technical solution, by providing the first inlet and outlet section 15, external piping can be facilitated, allowing the heat exchange medium to enter or exit the first heat exchange channel 10. At the same time, it can also guide the heat exchange fluid entering or exiting the first heat exchange channel 10, allowing the heat exchange fluid to enter or exit quickly, thereby improving the heat exchange rate. By providing the first inlet and outlet section 15 to extend along the second direction away from the first heat exchange section 11, the piping arrangement of the first heat exchange channel 10 can be more rationalized and facilitated to connect with external piping. At the same time, the first inlet and outlet can be away from the battery assembly composed of multiple rows of battery cells 102, which is beneficial to reduce the possibility of damage to the battery assembly due to water leakage from the first inlet and outlet.

[0191] In some embodiments of the present application, referring to Figures 3 and 5, the second heat exchange portion 121 extends along the second direction Y, and the second heat exchange section 12 further includes: a sixth bend 126, the sixth bend 126 is arc-shaped, and is connected between one end of the fourth heat exchange portion 125 and an end of the second heat exchange portion 121 away from the third heat exchange portion 122, and the other end of the fourth heat exchange portion 125 extends along the first direction X toward a direction away from the second heat exchange portion 121, and the first direction X and the second direction Y are set at an angle; the fixing member 25 is connected to the sixth bend 126 or the portion of the second heat exchange portion 121 close to the sixth bend 126.

[0192] The sixth bend 126 is formed into an arc shape, that is, it extends along an arc, and the fluid flow directions at both ends of the sixth bend 126 form a certain angle. As a result, the sixth bend 126 can change the flow direction of the heat exchange fluid, thereby allowing the second heat exchange portion 121 and the fourth heat exchange portion 125 to extend along a predetermined direction. At the same time, the arc-shaped sixth bend 126 can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further improving the heat exchange efficiency of the first heat exchange channel 10.

[0193] In the above technical solution, by setting the sixth bend 126, the flow direction of the fluid in the first heat exchange channel 10 can be changed, and the circuitous arrangement of the first heat exchange channel 10 can be realized, thereby increasing the heat exchange area of ​​the first heat exchange channel 10 and improving the heat exchange efficiency of the first heat exchange channel 10; at the same time, the sixth bend 126 is arc-shaped, which can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0194] According to some embodiments of the present application, as shown in FIG. 3 and FIG. 5 , the sixth bending portion 126 is in the shape of a quarter circle.

[0195] That is, the sixth bend 126 can extend along a semicircular arc. Specifically, the sixth bend 126 can extend along a quarter-circular arc that is convex away from the first heat exchange section 11. The angle between the inlet and outlet of the sixth bend 126 is 90°. The sixth bend 126 is similar to a 90° elbow in a pipe material and can change the flow direction, causing the fluid flow direction to change by 90° after passing through the sixth bend 126.

[0196] Furthermore, the sixth bent portion 126 connects the second heat exchange portion 121 and the fourth heat exchange portion 125 . At this time, the second heat exchange portion 121 and the fourth heat exchange portion 125 are arranged vertically.

[0197] The fixing member 25 can be connected to the sixth bend 126, or the fixing member 25 can be connected to the portion of the second heat exchange member 121 near the sixth bend 126. Thus, the fixing member 25 can provide a restraining and limiting effect on the area where the sixth bend 126 is located, reducing the probability of separation between the sixth bend 126 and the box body 200 or loose glue bonding, improving the stability of the heat exchange fluid when flowing through the sixth bend 126, and facilitating the improvement of the working reliability of the first heat exchange member 100, thereby improving the reliability of the battery 1.

[0198] In the above embodiment, by setting the sixth bend 126 in a quarter-circular arc shape, the flow direction of the fluid can be changed from the original flow direction to perpendicular to the original flow direction after passing through the sixth bend 126; at the same time, the arc shape can further reduce the resistance to fluid flow, allowing the fluid to flow smoothly within the sixth bend 126, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency. By providing a fixing member 25 to connect the sixth bend 126 or the portion of the second heat exchange portion 121 near the sixth bend 126, the probability of debonding or loose bonding between the location of the sixth bend 126 and the box body 200 can be reduced, thereby improving the heat exchange reliability between the heat exchange fluid and the battery cell 102 when flowing through the sixth bend 126, thereby improving the reliability of the battery 1.

[0199] Optionally, the sixth bend 126 can be semicircular. That is, the sixth bend 126 can extend along a semicircular arc, with the angle between the inlet and outlet of the sixth bend 126 being 180°, and the flow directions at the outlet and inlet of the sixth bend 126 being opposite. This brings the fourth heat exchange section 125 and the second heat exchange section 121 closer together, making the structures of the fourth heat exchange section 125 and the second heat exchange section 121 more compact and reliable. In other embodiments, the degree of bend of the sixth bend 126 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of the present application are not limited thereto.

[0200] In some embodiments of the present application, referring to Figures 3 and 5, the first heat exchange channel 10 also includes: a second inlet and outlet section 17, one end of the second inlet and outlet section 17 is connected to the fourth heat exchange part 125 at an angle, and the other end of the second inlet and outlet section 17 forms a second inlet and outlet of the heat exchange channel; and the second inlet and outlet section 17 extends along the second direction Y in a direction away from the first heat exchange section 11, and the fourth heat exchange part 125 is extended along the first direction X.

[0201] The second inlet and outlet are used for the inlet and outlet of the heat exchange fluid. When the second inlet and outlet are used for the inlet of the heat exchange fluid, the second inlet and outlet section 17 is used to transport the heat exchange fluid to the third heat exchange section 13. When the second inlet and outlet are used for the outlet of the heat exchange fluid, the second inlet and outlet section 17 is used to guide the heat exchange fluid after heat exchange into the first heat exchange channel 10 through the second inlet and outlet.

[0202] The second inlet / outlet section 17 is connected to the fourth heat exchange portion 125 at an angle. For example, the second inlet / outlet section 17 is connected to the fourth heat exchange portion 125 and is arranged at an angle greater than 0° and less than or equal to 180°. For example, the angle between the second inlet / outlet section 17 and the fourth heat exchange portion 125 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc.

[0203] It can be understood that a certain angle is formed between the second inlet and outlet section 17 and the fourth heat exchange part 125. As a result, a certain space is formed on the side of the fourth heat exchange part 125 facing the second inlet and outlet section 17. This is beneficial to the layout of other components in the battery 1 (such as high-voltage boxes and other structures).

[0204] In the above-described embodiment, the provision of the second inlet and outlet section 17 facilitates external piping, allowing heat exchange medium to enter or exit the first heat exchange channel 10, completing heat exchange with the battery cells 102. It also guides the heat exchange fluid entering or exiting the first heat exchange channel 10, allowing the heat exchange fluid to enter or exit quickly, thereby increasing the heat exchange rate. By extending the second inlet and outlet section 17 in a second direction away from the first heat exchange section 11, the piping layout of the first heat exchange channel 10 can be more rationalized and facilitated connection to external piping. Furthermore, the second inlet and outlet can be positioned away from the battery assembly, which helps reduce the risk of damage to the battery assembly due to water leakage at the second inlet and outlet.

[0205] According to some embodiments of the present application, referring to FIG. 3 and FIG. 5 , the first heat exchange channel 10 further includes: a seventh bending portion 18 , which is arc-shaped and bent and connected between the fourth heat exchange portion 125 and the second inlet and outlet section 17 .

[0206] Among them, the seventh bend 18 is arc-shaped, that is, the seventh bend 18 has a certain angle, thus, the seventh bend 18 is bent and connected between the fourth heat exchange part 125 and the second inlet and outlet section 17, which can realize the connection between the fourth heat exchange part 125 and the second inlet and outlet section 17, so that the heat exchange fluid can flow smoothly from the fourth heat exchange part 125 to the second inlet and outlet section 17 or from the second inlet and outlet section 17 to the fourth heat exchange part 125, realizing the liquid inlet or liquid outlet of the second inlet and outlet section 17; at the same time, the arc shape can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0207] In the above embodiment, by providing the seventh bend, the heat exchange fluid can flow smoothly from the fourth heat exchange part 125 to the second inlet and outlet section 17 or from the second inlet and outlet section 17 to the fourth heat exchange part 125, thereby realizing the liquid inlet or outlet of the second inlet and outlet section 17; at the same time, the arc shape of the seventh bend 18 can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange fluid and further increasing the heat exchange efficiency of the first heat exchange channel 10.

[0208] According to some embodiments of the present application, referring to FIG. 3 and FIG. 5 , the seventh bending portion 18 is arc-shaped, and the central angle corresponding to the seventh bending portion 18 is greater than or equal to 90° and less than 180°.

[0209] For example, the central angle corresponding to the seventh bending portion 18 may be 90°, 120°, 150° or 170°.

[0210] In the above embodiment, by setting the seventh bend 18 to be arc-shaped, the resistance to fluid flow can be further reduced, so that the fluid can flow smoothly in the seventh bend 18, effectively preventing the fluid from flowing too slowly and causing a decrease in heat exchange efficiency; at the same time, the central angle corresponding to the seventh bend 18 is greater than or equal to 90° and less than 180°, and an avoidance space can also be formed on the side of the fourth heat exchange part 125 toward the second entrance and exit section 17, which can be beneficial to the layout of other components in the battery 1 and improve the rationality of the layout of the battery 1.

[0211] Optionally, the seventh bend 18 can be semicircular. That is, the seventh bend 18 can extend along a semicircular arc, with the angle between the inlet and outlet of the seventh bend 18 being 180°, and the flow directions at the outlet and inlet of the seventh bend 18 being opposite. This brings the fourth heat exchange section 125 closer to the second inlet / outlet section 17, making the structure of the fourth heat exchange section 125 and the second inlet / outlet section 17 more compact and reliable. In other embodiments, the degree of curvature of the seventh bend 18 can be adjusted as needed, for example, to 150°, 135°, etc., and the embodiments of the present application are not limited thereto.

[0212] In some embodiments of the present application, referring to Figures 3 and 5, there are multiple first heat exchange elements 100, and they are arranged at intervals along the first direction X, and the first direction X is arranged at an angle to the second direction Y; the fixing element 25 is connected to at least one adjacent first bending portion 112 of the multiple first heat exchange elements 100 or the portion of the first heat exchange portion 111 close to the first bending portion 112.

[0213] It can be understood that "the second direction is arranged at an angle to the first direction" is intended to illustrate that the first and second directions can be arranged perpendicularly or intersecting non-perpendicularly. For example, the first and second directions can be arranged at an angle of 30°, 60°, or 80°. The number of first heat exchange elements 100 can be, but is not limited to, two, three, four, etc. For example, referring to Figure 5, there are two first heat exchange elements 100, spaced apart along the first direction X.

[0214] The fixing member 25 is connected to at least one adjacent first bend portion 112 of the plurality of first heat exchange elements 100, or to the portion of the first heat exchange portion 111 near the first bend portion 112. It can be understood that each first heat exchange element 100 may have multiple bends, and the fixing member 25 can be connected to one or more first bend portions 112 of each first heat exchange element 100, or the fixing member 25 can be connected to the portion of the first heat exchange portion 111 near the first bend portion 112 of each first heat exchange element 100. This improves the adaptability of the fixing member 25 to the plurality of first heat exchange elements 100 and facilitates fixing the edges of the plurality of first heat exchange elements 100 together to the box body 200.

[0215] In the above technical solution, by providing multiple first heat exchange elements 100 and arranging them at intervals along the first direction X, with the first direction X and the second direction Y being arranged at an angle, the diversity of the first heat exchange elements 100 can be increased, thereby improving the adaptability of the first heat exchange elements 100, enabling them to meet the needs of different batteries 1, thereby improving the market competitiveness of the battery 1. At the same time, the parallel arrangement of multiple first heat exchange elements 100 allows multiple first heat exchange elements 100 to exchange heat simultaneously, thereby reducing the heat exchange time of a single first heat exchange element 100 and improving heat exchange efficiency. By connecting the fixing element 25 to at least one adjacent first bend portion 112 of the multiple first heat exchange elements 100 or the portion of the first heat exchange element 111 near the first bend portion 112, the fixing element 25 can simultaneously fix the multiple first heat exchange elements 100 to the box body 200, thereby reducing the number of fixing elements 25, reducing the number of assembly steps, and improving assembly efficiency.

[0216] In some embodiments of the present application, the first heat exchange element 100 includes at least one heat exchange tube. When there are multiple heat exchange tubes, the multiple heat exchange tubes are arranged at intervals and connected in sequence, and the inner wall of each heat exchange tube is surrounded to form a first heat exchange channel 10.

[0217] For example, the number of heat exchange tubes can be one, two, three, or more, and the number of heat exchange tubes can be designed based on the size of battery 1. Specifically, heat exchange channels are defined within the heat exchange tubes for the circulation of the heat exchange fluid. The heat exchange tubes can have various shapes, such as circular tubes and flat tubes. The heat exchange channels defined by the heat exchange tubes can also have various shapes, such as U-shaped channels and meandering channels.

[0218] Furthermore, the plurality of heat exchange tubes are arranged in parallel. For example, the inlet ends of the plurality of heat exchange tubes are connected to the diversion cavity of the collector, and the outlet ends of the plurality of heat exchange tubes are all connected to the confluence cavity of the collector.

[0219] The plurality of heat exchange tubes may be arranged sequentially along the first direction, for example, the plurality of heat exchange tubes may be arranged spaced apart along the first direction X. Of course, the plurality of heat exchange tubes may also be arranged around each other, and further, the plurality of heat exchange tubes may be arranged around each other in the same plane.

[0220] In the above-described embodiment, by configuring the first heat exchange element 100 to include at least one heat exchange tube, not only can the process complexity of the first heat exchange element 100 be reduced, thereby increasing the production rate of the first heat exchange element 100, but the fluid pressure drop within a single heat exchange tube can also be reduced, thereby improving heat exchange efficiency. Furthermore, a tubular structure is simpler, less expensive, and easier to manufacture than a plate-like structure.

[0221] According to some embodiments of the present application, the heat exchange tube can be formed by bending a single tube.

[0222] Single tube bending refers to the process of bending a single straight tube multiple times through a process such as rolling to form a heat exchange tube. For example, a single straight tube can be bent at multiple preset locations to form a V-shape, U-shape, or other shape. The bending shape of a single tube can be designed based on actual conditions.

[0223] In the above embodiment, by setting the heat exchange tube to be formed by bending a single tube, the number of welding points of the first heat exchange element 100 can be reduced, thereby reducing the risk of leakage of the first heat exchange element 100 and improving the reliability of the use of the first heat exchange element 100; at the same time, the operation process of bending a single tube is simpler than the manufacturing process of the plate structure, thereby significantly reducing the cost of the first heat exchange element 100.

[0224] According to some embodiments of the present application, the heat exchange tube is bent in an arc shape at the bending position.

[0225] Among them, the arc-shaped bend can reduce the flow resistance of the fluid and reduce the pressure drop. Furthermore, the arc-shaped bend of the heat exchange tube at the bending position can increase the flow rate of the heat exchange fluid in the heat exchange channel, thereby increasing the heat exchange efficiency of the first heat exchange component 100.

[0226] In the above embodiment, by setting the heat exchange tube to bend in an arc shape at the bending position, the flow resistance of the fluid can be reduced, the pressure drop can be reduced, and the flow rate of the heat exchange fluid in the heat exchange channel can be increased, thereby increasing the heat exchange efficiency of the first heat exchange component 100.

[0227] In some embodiments of the present application, referring to Figures 6 and 9, the box body 200 has multiple box walls, at least one of the multiple box walls is a first box wall 2011, the first box wall 2011 is provided with a first groove 2011a, and the fixing member 25 is at least partially located in the first groove 2011a.

[0228] The box wall may refer to the wall body that encloses the interior space of the box body 200 and can be understood as a flat structure surrounding the interior space of the box body 200. The box wall may be made of, but is not limited to, other materials such as wood, plastic, and metal. Due to the different shapes of the box body 200, the number of box walls that enclose it may also vary. For example, when the box body 200 is in the shape of a rectangular parallelepiped, the box body 200 has six box walls, and one or more of the six box walls may be the first box wall 2011.

[0229] The first groove 2011a may refer to a notch or cutout formed on the first wall 2011 for accommodating or securing a component. The shape of the first groove 2011a may include, but is not limited to, a square, a strip, a circle, a racetrack, and the like, and may be adjusted to match the shape of the fixing member 25.

[0230] The first groove 2011a can be formed in many ways in the first box wall 2011. For example, when the thickness of the first box wall 2011 is relatively large, the first groove 2011a can be a groove dug on the first box wall 2011; when the first box wall 2011 is a sheet metal part with a relatively small thickness, the first groove 2011a can be a groove formed by the depression of the first box wall 2011.

[0231] In the above solution, the fixing member 25 can be partially located in the first groove 2011a, that is, the height of the fixing member 25 is greater than the depth of the first groove 2011a; the fixing member 25 can also be completely located in the first groove 2011a, that is, the height of the fixing member 25 is less than or equal to the depth of the first groove 2011a. For example, referring to Figures 8 and 9, the first box wall 2011 can be the bottom wall of the box body 200. Therefore, the "height of the fixing member 25" and "depth of the first groove 2011a" mentioned above can refer to the third direction Z of Figure 9. In other words, the fixing member 25 extends relatively small or not at all relative to the first box wall 2011 in the third direction Z. As a result, the assembly formed by the box body 200, the fixing member 25 and the first heat exchange element 100 is relatively compact in the third direction Z, and the overall size in the third direction Z is relatively small.

[0232] In the above technical solution, since the fixing member 25 is at least partially disposed within the first groove 2011a, the first groove 2011a provides the space required for installing the fixing member 25. This, on the one hand, improves the structural compactness of the assembly formed by the box body 200, the fixing member 25, and the first heat exchange element 100, allowing the overall dimensions to be relatively small, thereby saving space, reducing the volume, and increasing the volumetric energy density of the battery 1. On the other hand, the first groove 2011a acts as a limiter and restraint for the fixing member 25, improving the reliability of the connection between the fixing member 25 and the box body 200, and thereby improving the reliability of the connection between the first heat exchange element 100 and the box body 200, thereby improving the reliability of the battery 1 and extending its service life.

[0233] In some embodiments of the present application, referring to FIG. 9 , a portion of the first box wall 2011 protrudes toward a side away from the first heat exchange element 100 to form a convex portion 2012 , and a peripheral wall of the protruding portion of the convex portion 2012 forms a first groove 2011 a .

[0234] The convex portion 2012 may refer to a portion of the first box wall 2011 that is protruding or raised relative to the surrounding area. For example, the first box wall 2011 is a sheet metal part, and the convex portion 2012 may be a rib formed on the first box wall 2011.

[0235] In the above technical solution, the protrusion 2012 protrudes toward the inside of the box body 200, and the peripheral wall at the protruding position forms a first groove 2011a. Thus, while the first wall 2011 is provided with the first groove 2011a and can accommodate the fixing member 25, the thickness of the remaining portion of the first wall 2011, excluding the protrusion 2012, can be made relatively thin. This helps reduce the thickness and weight of the first wall 2011, thereby improving the energy density of the battery 1. Furthermore, the formation of the first groove 2011a on the peripheral wall of the protrusion 2012 also helps improve the strength of the first wall 2011 at the location of the first groove 2011a, reducing the problem of insufficient structural strength of the first wall 2011 due to the provision of the first groove 2011a. This improves the reliability of the first wall 2011, thereby improving the reliability of the box body 200, and thus improving the reliability of the battery 1 as a whole.

[0236] In some embodiments of the present application, referring to Figures 7, 8 and 9, the protrusion 2012 protrudes toward the inner side of the box body 200, and the battery 1 also includes: a beam body 103, the beam body 103 is arranged in the box body 200, and the beam body 103 is provided with a second groove 103a, and at least a portion of the protrusion 2012 is located in the second groove 103a.

[0237] The beam 103 may be a beam arranged inside the box body 200 to reinforce the box body, or may be a beam that cushions the expansion of the battery cells 102 (e.g., an expansion beam). The beam 103 may be, but is not limited to, a solid beam or a hollow beam. The shape of the beam 103 may be, but is not limited to, a square or a cylinder.

[0238] The second groove 103 a may refer to a notch or a cutout provided on the beam body 103 for accommodating or fixing components.

[0239] In the above technical solution, by providing the second groove 103a in the beam body 103 to accommodate the protrusion 2012, the beam body 103 and the protrusion 2012 can be combined together, reducing the probability of the protrusion 2012 occupying the space required by the battery cells 102 in the box body 200, which is conducive to improving the compactness of the internal structure of the battery 1, thereby increasing the volumetric energy density of the battery 1. Secondly, the protrusion 2012 and the second groove 103a can cooperate to limit the beam body 103, improving the reliability of the connection between the beam body 103 and the box body 200, and thus improving the reliability of the battery 1.

[0240] In some embodiments of the present application, referring to FIG. 3 and FIG. 7 , the beam body 103 and the fixing member 25 extend along the first direction X, and the second groove 103 a and the protrusion 2012 extend along the first direction X.

[0241] In the above technical solution, the beam body 103, the fixing member 25, the second groove 103a, and the protrusion 2012 are all elongated. The elongated shape of the second groove 103a and the protrusion 2012 not only improves the strength of the beam body 103, but also improves the tensile and bending strength of the beam body 103 in the first direction X, thereby improving the overall strength of the beam body 103. The elongated shape of the fixing member 25, on the one hand, can work together with the protrusion 2012 to further improve the structural strength of the beam body 103, and on the other hand, it can provide more fixing positions and a larger fixing surface, thereby enhancing the fixing effect on the first heat exchanger 100. While achieving a better fixing effect on the first heat exchanger 100, it can also reduce the number of fixing members 25 and improve assembly efficiency.

[0242] In some embodiments of the present application, referring to FIG. 3 and FIG. 7 , the beam body 103 is an expansion beam that can expand or contract along a second direction Y, where the second direction Y is parallel to the first box wall 2011 and perpendicular to the first direction X.

[0243] The expansion beam may refer to a component used to alleviate the volume expansion or contraction caused by charging and discharging or temperature changes inside the battery 1. The expansion beam is usually made of a flexible material, such as elastic rubber or polymer.

[0244] During the use of battery 1, the expansion beam can absorb the volume changes caused by the chemical reactions within the battery by deforming or bending, preventing or reducing deformation of the battery cell 102 and reducing the risk of stress concentration and damage to the battery cell 102. The expansion beam also protects the positive and negative electrodes and other components of the battery cell 102, reducing the chance of damage or rupture during the charge and discharge process of battery 1. Therefore, by reducing stress concentration and structural instability, the expansion beam helps maintain the electrochemical performance and cycle life of battery 1, and is one of the more important components of battery 1.

[0245] In the above technical solution, since the fixing member 25 extends along the first direction X, and the second groove 103a and the protrusion 2012 extend along the first direction X, the fixing member 25 and the protrusion 2012 can improve the structural strength of the expansion beam, and improve the tensile and bending strength of the expansion beam in the first direction X, and thus improve the reliability of the expansion beam, thereby helping to reduce the probability of stress concentration and structural instability in the battery cell 102, and further improve the overall reliability of the battery 1.

[0246] In some embodiments of the present application, referring to FIG. 9 , the beam body 103 is a hollow beam, and a portion of the beam body 103 protrudes toward the inside of the hollow beam to form a second groove 103 a.

[0247] A hollow beam is a beam structure with a hollow center section, typically hollowed out. The hollowed-out shape can include, but is not limited to, circular, rectangular, triangular, and trapezoidal shapes.

[0248] In the above technical solution, by setting the beam body 103 as a hollow beam, and having a portion of the beam body 103 protrude toward the inside of the hollow beam to form the second groove 103a, the strength of the beam body 103 can be further improved, and the reliability of the beam body 103 can be improved. Moreover, since the beam body 103 is a hollow beam, the second groove 103a can be formed by protruding inward, which is conducive to reducing the difficulty of forming the second groove 103a, improving the manufacturability of the second groove 103a, and thus reducing manufacturing costs. The beam body 103 being a hollow beam can also reduce the weight of the beam body 103, thereby reducing the overall weight of the battery 1 and increasing the energy density of the battery 1. In addition, the beam body 103 being a hollow beam has higher strength and rigidity, can play a better supporting role, and can reduce the amount of material used, which can further reduce manufacturing costs.

[0249] In some embodiments of the present application, the protrusion 2012 and the second groove 103 a are bonded together.

[0250] The protrusion 2012 and the second groove 103a are bonded together, which may refer to the protrusion 2012 and the second groove 103a being bonded together using, but not limited to, glue, double-sided tape, hot melt adhesive, and the like.

[0251] In the above technical solution, the bonding between the protrusion 2012 and the second groove 103a can make the combination of the two tighter and stronger, while improving the connection reliability between the beam body 103 and the box body 200, and further enhancing the strength amplification effect of the protrusion 2012 on the beam body 103, so that the beam body 103 has higher strength.

[0252] In some embodiments of the present application, the beam body 103 is a non-metallic beam body 103. In this technical solution, since the protrusion 2012 and the second groove 103a cooperate to improve the strength of the beam body 103, the beam body 103's own requirements for strength can be reduced. By setting the beam body 103 as a non-metallic beam body, the weight of the beam body 103 can be reduced, and electrical safety and thermal insulation effects can also be improved.

[0253] In some embodiments of the present application, referring to FIG. 3 , FIG. 6 and FIG. 9 , the first box wall 2011 is the bottom wall of the box body 200 , and the first heat exchange element 100 is located outside the box body 200 .

[0254] In the above technical solution, the first box wall 2011 is the bottom wall and can have a larger surface area. This allows the first heat exchange element 100 to be located on the bottom wall to have a larger exchange surface area, thereby improving the heat exchange effect of the first heat exchange element 100 on the battery cells 102, thereby improving heat exchange efficiency. The location of the first heat exchange element 100 outside the box body 200 can reduce the probability of the cooling medium in the first heat exchange element 100 leaking into the box body 200, thereby improving the reliability of the battery 1.

[0255] In some embodiments of the present application, referring to Figure 4, the box body 200 includes a box body 22 and a bottom plate 23, the bottom of the box body 22 is provided with a first opening 22a, the bottom plate 23 is connected to the bottom of the box body 22 to close the first opening 22a, the first heat exchange component 100 is attached to the side of the bottom plate 23 away from the box body 22, and the fixing component 25 is provided on the bottom plate 23.

[0256] The box body 22 may refer to the main body of the box body 200, and may refer to a frame structure with two ends or one end open. The box body 22 may include but is not limited to a frame structure and a shell structure surrounded by multiple plates.

[0257] The bottom plate 23 may refer to a plate disposed at the bottom of the box body 200 , and is used to close the first opening 22 a at the bottom of the box body 22 .

[0258] In the above technical solution, since the bottom plate 23 is typically the largest plate in the box body 200, the first heat exchange element 100 is attached to the side of the bottom plate 23 away from the box body 22. This creates a larger heat exchange surface with the battery cells 102 within the box body 200, improving heat exchange effects and efficiency. The fixing member 25 is provided on the bottom plate 23 and secures the first heat exchange element 100 outside the box body 200, reducing the space occupied by the fixing member 25 within the box body 200 and reducing its impact on the space required by the battery cells 102.

[0259] In some embodiments of the present application, referring to FIG. 4 , a second opening 22 b is provided on the top of the box body 22 , and the box body 200 further includes a top plate 24 , which is connected to the box body 22 and is used to close the second opening 22 b of the box body 22 .

[0260] The top plate 24 may refer to a plate disposed on the top of the box body 200 , and is used to close the top opening of the box body 22 .

[0261] In the above technical solution, the top plate 24 can close the second opening 22 b of the box body 22 to facilitate installation or removal of the battery cell 102 .

[0262] In some embodiments of the present application, referring to Figures 4 and 10, the battery 1 further includes a protective plate 27, which is provided on a side of the first heat exchange element 100 away from the box body 200. The protective plate 27 is connected to the box body 200, and a third cavity 200a is formed between the protective plate 27 and the box body 200. The first heat exchange element 100 is located in the third cavity 200a.

[0263] The protective plate 27 may refer to a plate that protects the first heat exchange element 100. When the box body 200 is impacted, the protective plate 27 can withstand the impact force, reducing damage to the first heat exchange element 100 caused by the impact, thereby improving the reliability of the first heat exchange element 100. For example, when the electrical device is a vehicle 1000, the battery 1 is arranged at the bottom of the vehicle. During driving, the battery 1 is easily impacted by objects such as stones. Since the first heat exchange element 100 is arranged on the outside of the box body 200, the protective plate 27 can withstand the impact of objects such as stones, reducing the probability of damage to the first heat exchange element 100 and providing better protection for the first heat exchange element 100.

[0264] Optionally, the guard plate 27 may be, but is not limited to, a metal part, a plastic part, etc. Exemplarily, the guard plate 27 may be a steel plate or an aluminum plate.

[0265] The protective plate 27 is positioned on the main body 200 to correspond to the first heat exchange element 100. As previously mentioned, the main body 200 may include a housing 22 and a bottom plate 23. When the first heat exchange element 100 is positioned against the outside of the housing 22, the protective plate 27 is positioned on the side of the main body 200. When the first heat exchange element 200 is positioned against the outside of the bottom plate 23, the protective plate 27 is positioned on the bottom of the main body 200 (see FIG. 4 ).

[0266] The third cavity 200a may refer to a closed space defined by the guard plate 27 and the box body 200. The first heat exchange element 100 is arranged in the third cavity 200a, thereby reducing external impacts and contact with water and dust in the external environment, thereby reducing the probability of damage to the first heat exchange element 100 and extending the service life of the first heat exchange element 100.

[0267] In the above technical solution, by setting the protective plate 27 on the side of the first heat exchanger 100 away from the box body 200, the first heat exchanger 100 can be protected, the probability of the first heat exchanger 100 being damaged by collision with foreign objects is reduced, and the probability of the first heat exchanger 100 being impacted by foreign objects is reduced, thereby improving the reliability of the first heat exchanger 100 and further improving the reliability of the battery 1.

[0268] In some embodiments of the present application, referring to FIG. 4 and FIG. 10 , the tank body 200 further includes a filler 28 , which is filled in the gap between the first heat exchange element 100 and the third chamber 200 a .

[0269] Filler 28 may refer to a substance or material used to fill gaps and spaces between materials. For example, filler 28 may include, but is not limited to, plastic materials and foam materials. Alternatively, filler 28 may be a foam material, which may refer to a material having a closed or open cell structure. Filler 28 may include, but is not limited to, polystyrene foam and polyurethane foam.

[0270] Alternatively, the filler 28 may be a molded part and integrated onto the surface of the tank body 200 on the side close to the first heat exchange element 100. For example, the filler 28 may be integrated onto one of the tank body 22 and the bottom plate 23. In this example, the first heat exchange element 100 may be mounted on the filler 28, and then the guard plate 27 may be mounted onto the tank body 200. The filler 28 may also be integrated onto the surface of the guard plate 27 on the side close to the first heat exchange element 100. In this example, the first heat exchange element 100 may be mounted on the tank body 200, and then the guard plate 27 may be mounted onto the tank body 200.

[0271] 4 and 10 , the filler 28 may be provided with a mounting groove 28 b , and the first heat exchange element 100 is disposed in the mounting groove 28 b , thereby improving the installation reliability of the first heat exchange element 100 and the filler 28 .

[0272] Optionally, the guard plate 27 and the box body 200 may also be provided with an injection hole, and the filler 28 is a foam, which can be injected into the third cavity 200a through the injection hole, thereby filling the gap between the first heat exchange component 100 and the third cavity 200a, and forming after cooling.

[0273] In the above technical solution, the filler 28 can separate the first heat exchange element 100 from the protective plate 27 and act as a buffer when the protective plate 27 is impacted, reducing damage to the first heat exchange element 100 when the protective plate 27 is impacted, thereby improving the reliability of the first heat exchange element 100. Furthermore, by providing the filler 28 within the gap between the first heat exchange element 100 and the third chamber 200a, the filler 28 acts on the first heat exchange element 100, the box body 200, and the protective plate 27, making the first heat exchange element 100 more securely mounted within the third chamber 200a, reducing the probability of displacement of the first heat exchange element 100 within the third chamber 200a, and improving the stability of the first heat exchange element 100. Furthermore, the filler 28 also provides insulation, reducing the probability of heat exchange between the first heat exchange element 100, the protective plate 27, and the external environment, allowing the first heat exchange element 100 to focus on heat exchange with the battery cells 102 within the accommodating chamber 21, thereby improving heat exchange efficiency.

[0274] In some embodiments of the present application, referring to Figures 10, 11 and 12, the filler 28 is a filling layer, the filling layer has a first top surface 28a close to the side of the box body 200, the first heat exchanger 100 has a second top surface 100b close to the side of the box body 200, and the height of the second top surface 100b relative to the guard plate 27 is greater than the height of the first top surface 28a relative to the guard plate 27; the box body 200 also includes an adhesive 29, which is arranged on the first top surface 28a and the second top surface 100b.

[0275] The filling layer may refer to a layer of foam material. The first top surface 28a may refer to the surface of the filling layer close to the box body 200. For example, when the first heat exchange element 100 and the guard plate 27 are arranged at the bottom of the box body 200, the first top surface 28a is the upper surface of the filling layer.

[0276] The second top surface 100b may refer to the surface of the first heat exchange element 100 close to the tank body 200. For example, when the first heat exchange element 100 and the guard plate 27 are arranged at the bottom of the tank body 200, the second top surface 100b is the upper surface of the first heat exchange element 100.

[0277] The adhesive 29 may be a connecting member that uses an adhesive material to bond the filling layer and the first heat exchange element 100 to the box body 200 and can play a sealing role. The adhesive 29 may include but is not limited to glue, tape, adhesive and structural adhesive.

[0278] In the above technical solution, the second top surface 100b of the first heat exchange element 100 is arranged to protrude relative to the first top surface 28a of the filling layer. As a result, the gap between the first top surface 28a and the wall of the box body 200 is larger than the gap between the second top surface 100b and the wall of the box body 200. The thickness of the glue coating of the filling layer is greater than the thickness of the glue coating of the first heat exchange element 100. The thicker the glue coating of the filling layer, the better the connection reliability between the filling layer and the box body 200, thereby facilitating the installation reliability of the first heat exchange element 100. The thinner glue coating of the first heat exchange element 100 can, on the one hand, improve the connection reliability between the first heat exchange element 100 and the box body 200, and on the other hand, reduce the obstruction to the heat exchange of the first heat exchange element 100, thereby enhancing the heat exchange effect of the first heat exchange element 100 on the battery cells 102 in the box body 200, thereby facilitating the improvement of the heat exchange efficiency of the first heat exchange element 100.

[0279] In some embodiments of the present application, referring to FIG. 10 , the box body 200 is an integrally stamped part and includes a bottom wall 200 b and a surrounding wall 200 c .

[0280] The bottom wall 200b may refer to the bottom wall of the box body 200. The surrounding wall 200c may refer to the peripheral annular wall of the box body 200. The first heat exchange element 100 may be disposed on the outer side of the bottom wall 200b and / or the surrounding wall 200c.

[0281] In the related art, the water-cooling plate of the battery is arranged at the bottom of the frame and is used to close the opening at the bottom of the frame, serving as the bottom wall of the box body. In this technical solution, a large number of fasteners (such as screws, up to several hundred in number) are required when assembling the cold plate and the frame, and sealants or gaskets are required to seal between the cold plate and the frame, which not only increases the manufacturing cost, but also poses a risk of sealing failure. In the above example solution, the box body 200 is an integral stamped part, which can reduce the sealing requirements. For example, the side of the box body 200 close to the first heat exchanger 100 does not need to be sealed, which can reduce the use of sealants and gaskets, reduce costs, and greatly reduce the probability of sealing failure, thereby improving the safety and reliability of the box body 200.

[0282] Compared with the way in which cold plates and frames use fasteners to form the box body structure, the box body 200 of the present application is an integral stamped part, which has neither fasteners such as screws nor welds. The box body 200 has better integrity, which is beneficial to reducing the probability of weak strength positions and can improve the structural strength and reliability of the box body 200.

[0283] In the above technical solution, by configuring the box body 200 as an integral stamped part, the bottom and surrounding sides of the box body 200 are closed and have high sealing performance. After the first heat exchanger 100 is attached to the outside of the box body 200, the sealing requirements for the box body 200 can be reduced, which is conducive to simplifying the assembly process and reducing manufacturing costs. In addition, the box body 200 is an integral stamped part, which makes the box body 200 have a relatively high structural strength and a relatively low probability of deformation and impact damage, which is conducive to improving the reliability of the battery 1. Since the box body 200 is an integral stamped part, the box body 200 has a relatively small wall thickness while having high strength, which can reduce the weight of the box body 200 and improve the energy density per unit volume of the battery 1.

[0284] In some embodiments of the present application, referring to FIG. 3 , the first heat exchange element 100 includes a plurality of flat-mouth tubes connected in sequence, and the inner wall of each flat-mouth tube is surrounded by a first heat exchange channel 10 .

[0285] Flat-mouth pipes can refer to pipes with a flat shape or a narrow diameter and a long length. Flat-mouth pipes usually have an oval or rectangular cross-section.

[0286] The first heat exchange channel 10 may refer to a channel for circulating a cooling medium. When the cooling medium flows through the battery cell 102 along the heat exchange channel, it can exchange heat with the battery cell 102 to adjust the temperature of the battery 1 .

[0287] In the above technical solution, since the tank body 200 is a one-piece stamped part, by configuring the first heat exchange element 100 to include multiple flat-end tubes, the structural arrangement of the first heat exchange element 100 and the tank body 200 can be made more compact, space utilization is more efficient, and the volume of the tank body 200 is reduced, thereby increasing the volumetric energy density of the battery 1. Furthermore, the flat-end tubes have good compressive strength, can withstand certain pressures and loads, and provide good pipe protection and structural support, thereby improving the reliability of the first heat exchange element 100.

[0288] In some embodiments of the present application, the flat-mouth tube includes one of a bent aluminum alloy tube, an aluminum alloy harmonica cold tube, an aluminum alloy stamped cold plate, and an aluminum alloy brazed cold plate.

[0289] In the above technical solution, by setting the flat-mouth tube to include one of a bent aluminum alloy tube, an aluminum alloy harmonica cold tube, an aluminum alloy stamped cold plate, and an aluminum alloy brazed cold plate, a variety of structures can be provided for the design of the flat-mouth tube, thereby improving the design flexibility and reducing the manufacturing difficulty.

[0290] In some embodiments of the present application, referring to Figure 13, the battery 1 also includes a second heat exchange element 300, which is located in the box body 200 and is attached to at least one inner wall surface of the box body 200. The structure of the second heat exchange element 300 is the same as or different from the structure of the first heat exchange element 100.

[0291] The second heat exchanger 300 may refer to a device or component used to transfer heat during a heat exchange process. The second heat exchanger 300 is typically used to transfer heat from one medium to another, achieving heat transfer and utilization. For example, the second heat exchanger 300 may be, but is not limited to, a radiator or cold plate. The second heat exchanger 300 may have the same structure as the first heat exchanger 100 or a different structure.

[0292] The inner wall surface of the box body 200 may refer to the wall surface located inside the box body 200. The box body 200 may have multiple inner wall surfaces, and the number of inner wall surfaces may vary depending on the shape of the box body 200. For example, when the box body 200 is a rectangular parallelepiped or a cube, the box body 200 may have six inner wall surfaces, and the second heat exchange member 300 may be fitted on at least one of the top inner wall surface, the bottom inner wall surface, and the four side inner wall surfaces of the box body 200. Referring to Figure 13, optionally, the second heat exchange member 300 may be provided at the top and bottom of the battery cell 102, and fitted on the top inner wall surface and the bottom inner wall surface of the box body 200.

[0293] For example, the first heat exchange element 100 is attached to the outer side of the bottom wall of the box body 200, and the second heat exchange element 300 is attached between the four inner walls of the box body 200 and the battery cells 102. Thus, the first heat exchange element 100 can perform heat exchange with the bottom surface of the battery cells 102, and the second heat exchange element 300 can perform heat exchange with the outermost of the multiple battery cells 102, thereby improving the overall heat exchange efficiency of the battery cells 102 in the accommodating cavity 21.

[0294] In the above technical solution, the box body 200 can not only exchange heat with one side of the internal battery cell 102 through the first heat exchange element 100, but also exchange heat with the other side of the battery cell 102 through the second heat exchange element 300. That is to say, the second heat exchange element 300 and the first heat exchange element 100 can cooperate with each other to exchange heat with the battery cell 102, thereby being able to exchange heat with more sides of the battery cell 102, and increasing the heat exchange surface of the battery cell 102, which is beneficial to improving the heat exchange efficiency and greatly enhancing the heat exchange effect.

[0295] In some embodiments of the present application, referring to Figure 14, the battery 1 also includes a third heat exchange element 400, which is located in the box body 200 and is arranged between any two adjacent battery cells 102. The structure of the third heat exchange element 400 is the same as or different from the structure of the first heat exchange element 100.

[0296] The third heat exchanger 400 may refer to a device or component used to transfer heat during a heat exchange process. The third heat exchanger 400 is typically used to transfer heat from one medium to another, achieving heat transfer and utilization. For example, the third heat exchanger 400 may be, but is not limited to, a radiator or cold plate. The third heat exchanger 400 may have the same structure as the first heat exchanger 100 or a different structure.

[0297] The battery cells 102 can be arranged in one or more rows within the box body 200. Referring to FIG14 , the battery cells 102 are arranged in three rows along the second direction Y of the box body 200, with multiple battery cells 102 in each row arranged along the first direction X. A third heat exchange element 400 can be disposed between two adjacent rows of battery cells 102, and the third heat exchange element 400 and the two adjacent rows of battery cells 102 are disposed in contact with each other, thereby enabling the third heat exchange element 400 to exchange heat between two adjacent battery cells 102.

[0298] Optionally, the battery 1 may include a first heat exchange element 100 and a third heat exchange element 400, wherein the first heat exchange element 100 is arranged on the outside of the wall of the box body 200 away from the accommodating cavity 21, and the third heat exchange element 400 is arranged between two adjacent rows of battery cells 102, thereby exchanging heat with the battery cells 102 through the two heat exchange elements.

[0299] Optionally, the battery 1 may also include a first heat exchange element 100, a second heat exchange element 300 and a third heat exchange element 400, the first heat exchange element 100 is attached to the wall of the box body 200 away from the outside of the accommodating cavity 21, the second heat exchange element 300 is attached to the inner wall surface of the box body 200, and the third heat exchange element 400 is arranged between two adjacent battery cells 102, thereby exchanging heat with the battery cells 102 through three heat exchange elements.

[0300] In the above technical solution, the first heat exchange element 100 can perform heat exchange on the side surfaces of multiple battery cells 102 located on the same side in the box body 200, while the third heat exchange element 400 can perform heat exchange on the other side surface between two adjacent battery cells 102. Thus, the third heat exchange element 400 and the first heat exchange element 100 cooperate with each other to perform heat exchange on the two surfaces of the battery cell 102, thereby being able to perform heat exchange on more sides of the battery cell 102, thereby increasing the heat exchange surface of the battery cell 102, which is beneficial to improving the heat exchange efficiency and greatly enhancing the heat exchange effect.

[0301] The battery 1 provided according to an embodiment of the present application includes a box body 200, a battery cell 102, a first heat exchange element 100, a fixing element 25 and an expansion beam.

[0302] The first heat exchange element 100 is a cold pipe, which is attached to the bottom surface of the box body 200 and fixed by bonding.

[0303] The fixing member 25 is a fixing bracket, positioned corresponding to the bent portion of the cooling pipe. The bottom wall of the box body 200 partially protrudes inward, and the surrounding wall of the protruding portion forms a groove, within which the fixing bracket is positioned. The fixing bracket can be secured to the box body 200 by various means, including but not limited to welding, gluing, riveting, and snap-fit ​​connections. Correspondingly, a matching bracket is added to the cooling pipe to secure it to the fixing bracket, preventing the cooling pipe from sagging and affecting thermal management.

[0304] The side of the expansion beam close to the cold pipe is recessed inward to form an assembly groove, and the protruding part of the box body 200 is arranged in the assembly groove, so that more inner cavity space of the expansion beam can be used to fix the fixed bracket. The higher the upward arch of the bottom wall of the box body 200, the higher the overall strength of the box body 200 will be, which can reduce the demand for force strength of the expansion beam. Replacing the expansion beam with a non-metallic structure can not only reduce the weight of the structural parts, but also improve electrical safety and improve the thermal insulation effect.

[0305] In the second aspect, the embodiment of the present application provides an electric device, including the battery 1 as described above.

[0306] In the above technical solution, since the connection reliability between the first heat exchange component 100 and the box body 200 in the battery 1 is relatively high, the probability of separation between the first heat exchange component 100 and the box body 200 is relatively low. Therefore, the battery 1 has a high heat exchange stability and can improve the power reliability of the electrical device.

[0307] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0308] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, wherein: include: Box body; A battery cell is arranged in the box body; A first heat exchange component is arranged on the outside of the box body; A fixing member is provided on the box body, and is provided close to at least one edge of the first heat exchange member, and is used to fasten the first heat exchange member and the box body.

2. The battery according to claim 1, wherein The first heat exchange element includes a first heat exchange channel, which includes a first heat exchange section and a second heat exchange section; the second heat exchange section is bent to form a U-shaped area, the first heat exchange section is bent and arranged in the U-shaped area, and is bent and connected to the second heat exchange section; The fixing member is connected to the first heat exchange section and the second heat exchange section, and is arranged close to or corresponding to the bending parts of the first heat exchange section and the second heat exchange section.

3. The battery according to claim 2, wherein The first heat exchange section includes: a first heat exchange portion and a first bending portion, the first heat exchange portion is multiple, the multiple first heat exchange portions are arranged at intervals in the first direction and are sequentially connected by the first bending portions, each first heat exchange portion extends along the second direction, the second direction is arranged at an angle to the first direction, and the first bending portion is arc-shaped; The fixing member is connected to the first bending portion or a portion of the first heat exchange portion close to the first bending portion.

4. The battery according to claim 3, wherein There are multiple fixing members, and they are at least arranged on both sides of the first heat exchange section along the second direction. Each fixing member extends along the first direction and connects at least one adjacent first bending portion and / or the portion of the first heat exchange portion close to the first bending portion.

5. The battery according to claim 3 or 4, wherein The second heat exchange section includes: a second heat exchange portion, a third heat exchange portion, a fourth heat exchange portion, a second bent portion, and a third bent portion. The second heat exchange portion extends along a first side circumference of the first heat exchange section. The third heat exchange portion is connected between the second heat exchange portion and the first heat exchange section and extends along a second side circumference of the first heat exchange section. A first end of the third heat exchange portion is connected to the second heat exchange portion at an angle, and a second end of the third heat exchange portion is connected to the first heat exchange section at an angle. The fourth heat exchange portion is in communication with the second heat exchange portion, is connected to the second heat exchange portion at an angle, and extends along a third side circumference of the first heat exchange section. The second bending portion and the third bending portion are both arc-shaped, the second bending portion is connected between the first end of the third heat exchange portion and the second heat exchange portion, and the third bending portion is connected between the second end of the third heat exchange portion and the first heat exchange section; The fixing member is connected to the second bending portion or the portion of the second heat exchange portion close to the second bending portion; The fixing member is connected to the third bending portion or a portion of the first heat exchange section close to the third bending portion.

6. The battery according to claim 5, wherein The first heat exchange section includes a plurality of first heat exchange parts, which are bent and connected in sequence in the first direction, and each of the first heat exchange parts extends along the second direction, and the second direction is arranged at an angle to the first direction; The first heat exchange channel further includes: a third heat exchange section and a fourth bent portion, the third heat exchange section being arranged on a side of the first heat exchange section away from the third heat exchange portion, the third heat exchange section being connected to one of the plurality of first heat exchange portions that is closest to the second heat exchange portion along the first direction, and the fourth bent portion being arc-shaped and connected between the third heat exchange section and the first heat exchange portion; The fixing member is connected to the fourth bending portion or a portion of the first heat exchange portion close to the fourth bending portion.

7. The battery according to claim 6, wherein There are multiple fixing members, and they are at least arranged on both sides of the first heat exchange section along the second direction, and each fixing member extends along the first direction; One of the multiple fixing members close to the third heat exchange portion is a first fixing member, and another close to the third heat exchange section is a second fixing member. The first fixing member is connected to or arranged close to the second bending portion, and is connected to or arranged close to the third bending portion, and the second fixing member is connected to or arranged close to the fourth bending portion.

8. The battery according to claim 6 or 7, wherein The first heat exchange channel also includes: a first inlet and outlet section, one end of the first inlet and outlet section is connected to the third heat exchange section at an angle, and the other end of the first inlet and outlet section forms a first inlet and outlet of the heat exchange channel; the first inlet and outlet section extends along the second direction away from the first heat exchange section, and the third heat exchange section is extended along the first direction.

9. The battery according to any one of claims 5 to 8, wherein The second heat exchange portion extends along the second direction, and the second heat exchange section further includes: a sixth bent portion, the sixth bent portion being arc-shaped and connected between one end of the fourth heat exchange portion and an end of the second heat exchange portion away from the third heat exchange portion, the other end of the fourth heat exchange portion extending along the first direction away from the second heat exchange portion, and the first direction and the second direction forming an angle; The fixing member is connected to the sixth bending portion or a portion of the second heat exchange portion close to the sixth bending portion.

10. The battery according to any one of claims 5 to 9, wherein The first heat exchange channel also includes: a second inlet and outlet section, one end of the second inlet and outlet section is connected to the fourth heat exchange part at an angle, and the other end of the second inlet and outlet section forms a second inlet and outlet of the heat exchange channel; and the second inlet and outlet section extends along the second direction away from the first heat exchange section, and the fourth heat exchange part is extended along the first direction.

11. The battery according to any one of claims 3 to 10, wherein There are multiple first heat exchange elements, which are spaced apart along a first direction, and the first direction and the second direction are arranged at an angle; The fixing member is connected to at least one adjacent first bending portion of the plurality of first heat exchange members or a portion of the first heat exchange portion close to the first bending portion.

12. The battery according to any one of claims 2 to 11, wherein The first heat exchange element includes at least one heat exchange tube. When there are multiple heat exchange tubes, the multiple heat exchange tubes are arranged at intervals and connected in sequence. The inner wall of each heat exchange tube is surrounded to form the first heat exchange channel.

13. The battery according to any one of claims 1 to 12, wherein The box body has a plurality of box walls, at least one of the plurality of box walls is a first box wall, the first box wall is provided with a first groove, and the fixing member is at least partially located in the first groove.

14. The battery according to claim 13, wherein A portion of the first box wall protrudes toward a side away from the first heat exchange element to form a convex portion, and a peripheral wall of the protruding position of the convex portion forms the first groove.

15. The battery according to claim 14, wherein The convex portion protrudes toward the inner side of the box body. The battery further includes a beam body, which is arranged in the box body. The beam body is provided with a second groove, and at least a part of the convex portion is located in the second groove.

16. The battery according to claim 15, wherein The beam body and the fixing member extend along a first direction, and the second groove and the protrusion extend along the first direction.

17. The battery according to claim 16, wherein The beam body is an expansion beam, and the expansion beam can expand or contract along a second direction, and the second direction is parallel to the first box wall and perpendicular to the first direction.

18. The battery according to any one of claims 15 to 17, wherein The beam body is a hollow beam, and a portion of the beam body protrudes toward the inner side of the hollow beam to form the second groove.

19. The battery according to any one of claims 15 to 18, wherein The protrusion and the second groove are bonded and connected.

20. The battery according to any one of claims 15 to 19, wherein The beam body is a non-metal beam body.

21. The battery according to any one of claims 13 to 20, wherein The first box wall is the bottom wall of the box body, and the first heat exchange element is located outside the box body.

22. The battery according to any one of claims 1 to 21, wherein The box body includes: a box body and a bottom plate, the bottom of the box body is provided with a first opening, the bottom plate is connected to the bottom of the box body to close the first opening, the first heat exchange component is attached to the side of the bottom plate away from the box body, and the fixing component is provided on the bottom plate.

23. The battery according to any one of claims 1 to 22, wherein The battery further includes a protective plate, which is provided on a side of the first heat exchange element away from the box body. The protective plate is connected to the box body and forms a protective space with the box body. The first heat exchange element is located in the protective space.

24. The battery according to any one of claims 1 to 23, wherein The box body is an integral stamped part and includes a bottom wall and a surrounding wall.

25. The battery according to claim 24, wherein The first heat exchange component includes a plurality of flat-mouth tubes connected in sequence, and the inner wall of each flat-mouth tube is surrounded by a first heat exchange channel.

26. The battery according to any one of claims 1 to 25, wherein The battery further includes a second heat exchange member located in the box body and attached to at least one inner wall surface of the box body. The structure of the second heat exchange member is the same as or different from that of the first heat exchange member.

27. The battery according to any one of claims 1 to 26, wherein The battery further includes a third heat exchange element, which is located in the box body and disposed between any two adjacent battery cells. The structure of the third heat exchange element is the same as or different from that of the first heat exchange element.

28. An electrical device, wherein: Comprising a battery as claimed in any one of claims 1 to 27.

Images