Heat exchange assembly, battery and electric device

Abstract

The present application relates to a heat exchange assembly, a battery and an electric device. The heat exchange assembly comprises a plastic heat exchange plate, a flow convergence member and a support member. The plastic heat exchange plate has heat exchange flow channels and a flow collection end, the flow collection end having a welding area. The flow convergence member is connected to the plastic heat exchange plate and communicates the heat exchange flow channels with the outside, and comprises a flow convergence end welded to the welding area. The support member comprises support portions arranged in the heat exchange flow channels, the support portions abutting against the inner walls of the heat exchange flow channels corresponding to the welding area, and the melting point of the support member being higher than that of the plastic heat exchange plate.

Description

Heat exchange components, batteries and electrical devices

[0001] Cross-references

[0002] This application refers to Chinese Patent Application No. 2024102489270, filed on March 4, 2024, entitled “Heat Exchange Component, Battery and Electrical Device,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to heat exchange components, batteries, and electrical devices. Background Art

[0004] Due to the limited internal space of the battery, the tightly packed cells inevitably lead to heat accumulation, necessitating heat dissipation. The mainstream cooling solution uses liquid cooling plates to dissipate heat from the bottom of the cells, while neglecting the higher-heating cell posts. This is because conventional metal liquid cooling plates fail to meet insulation requirements when used to cool the posts, easily inducing short circuits and leading to uncontrollable thermal safety issues.

[0005] In related technologies, plastic heat exchanger plates and manifolds, based on their lightweight and insulating properties, can be used to dissipate heat in battery cell tabs and other locations. However, the weld seal between the manifold and the plastic heat exchanger plates is currently poor, easily leading to leakage.

[0006] Application Contents

[0007] Based on this, it is necessary to provide a heat exchange component, a battery and an electrical device to address the problem of poor welding sealing of plastic heat exchange plates and manifolds.

[0008] In a first aspect, an embodiment of the present application provides a heat exchange assembly, comprising:

[0009] A plastic heat exchange plate having a heat exchange channel for circulating a heat exchange medium, the plastic heat exchange plate having a collecting end; the heat exchange medium flows into and / or flows out of the heat exchange channel from the collecting end, and the outer surface of the collecting end includes a welding area for welding;

[0010] a conduit connecting the plastic heat exchange plate and connecting the heat exchange channel with the outside, the conduit comprising a conduit end welded to the welding area; and

[0011] The support member includes a support portion provided in the heat exchange channel, the support portion abuts against the inner wall of the heat exchange channel corresponding to the welding area, and the melting point of the support member is higher than the melting point of the plastic heat exchange plate.

[0012] In some embodiments, the supporting portion has a first channel, and the first channel connects the heat exchange channel and the manifold.

[0013] In some embodiments, the support portion continuously abuts against the inner wall of the heat exchange channel along the circumference of the heat exchange channel and encloses itself to form the first channel.

[0014] In some embodiments, the support member includes a reinforcing rib, which is located in the first channel and supports an inner wall of the first channel.

[0015] In some embodiments, the support portion abuts against a partial inner wall of the heat exchange channel in a circumferential direction, and the support portion is formed with the first channel open toward the inner wall of the heat exchange channel.

[0016] In some embodiments, the support member further includes a limiting portion connected to the supporting portion, and the limiting portion can limit the axial movement of the supporting portion in the heat exchange channel.

[0017] In some embodiments, the confluence end has a concave cavity, and the limiting portion is inserted into the concave cavity;

[0018] The limiting portion has a limiting surface, and the limiting surface and the supporting portion are arranged at the same end of the limiting portion; the collecting end is inserted into the concave cavity, and its end surface abuts against the limiting surface;

[0019] A step surface is formed in the concave cavity, and the step surface abuts against an end of the limiting portion away from the limiting surface.

[0020] In some embodiments, the outer wall surface of the limiting portion is adaptively fitted with the inner wall surface contour of the cavity; the limiting portion has a second channel connecting the heat exchange channel and the conduit; the flow area of ​​the second channel is larger than the flow area of ​​the heat exchange channel.

[0021] In some embodiments, the outer circumferential surface of the current collecting end is flush with the outer circumferential surface of the limiting portion, or the outer circumferential surface of the current collecting end protrudes from the outer circumferential surface of the limiting portion.

[0022] In some embodiments, a plurality of the supporting portions are provided at the same end of the limiting portion.

[0023] In some embodiments, the support portion abuts against the inner wall of the heat exchange channel at least in the thickness direction of the plastic heat exchange plate.

[0024] In some embodiments, the inner diameter d1 of the heat exchange channel in the thickness direction of the plastic heat exchange plate and the inner diameter d2 of the heat exchange channel in a direction perpendicular to both its extension direction and the thickness direction of the plastic heat exchange plate satisfy: d1<d2.

[0025] In some embodiments, the d1 and the d2 satisfy: 1mm≤d1≤5mm, 5mm≤d2≤20mm.

[0026] In some embodiments, the thickness H of the plastic heat exchange plate satisfies: 1 mm ≤ H - d1 ≤ 5 mm; and / or 1 mm ≤ d1 ≤ 2 mm.

[0027] In some embodiments, the plastic heat exchange plate has a plurality of heat exchange channels, all of which are arranged at intervals along the width direction of the plastic heat exchange plate; each heat exchange channel is correspondingly provided with the support portion;

[0028] And / or, both opposite ends of the plastic heat exchange plate are the collecting ends, the heat exchange channel extends from one of the collecting ends to the other of the collecting ends, and each of the collecting ends is welded with the confluence piece.

[0029] In some embodiments, the plastic heat exchange plate is made of one or more materials selected from the group consisting of PPS, PP, and PA.

[0030] In a second aspect, an embodiment of the present application provides a battery, comprising:

[0031] Multiple battery cells;

[0032] And the heat exchange assembly described in any of the above embodiments, at least one side surface of the plastic heat exchange plate in the thickness direction is used for thermal connection with the battery core.

[0033] In some embodiments, a plurality of the battery cells are adjacently arranged to form a battery cell group; a pole is protruding from the same side of each of the battery cells in each of the battery cell groups, and a plurality of the poles in the battery cell group are thermally connected to the same plastic heat exchange plate.

[0034] In some embodiments, the battery includes a thermal pad and a busbar, the busbar is electrically connected to the poles of the battery cell group, and the thermal pad is disposed between the busbar and the plastic heat exchange plate.

[0035] In some embodiments, each of the battery cell groups is correspondingly configured with at least one pair of the heat exchange components; the two plastic heat exchange plates in each pair of the heat exchange components are correspondingly thermally connected to the poles of different polarities of the battery cell group;

[0036] Each of the heat exchange components includes a first conduit and a second conduit, and the plastic heat exchange plate is connected between the first conduit and the second conduit, the first conduit has a first interface and a second interface that are connected, and the second conduit has a second interface;

[0037] In each pair of the heat exchange components, the second interface of the first flow conduit of any one of the heat exchange components is communicated with the second interface of the second flow conduit of the other heat exchange component.

[0038] In a third aspect, an embodiment of the present application provides an electrical device, comprising a battery as described in any of the above embodiments, wherein the battery is used to provide electrical energy.

[0039] When welding the collector and conduit ends of the aforementioned heat exchange assembly, battery, and electrical device, the heat from welding can easily soften the plastic heat exchange plate corresponding to the weld area, causing the heat exchange channel corresponding to the weld area to collapse. In this case, due to the high melting point of the support member, the support portion withstands the high welding temperatures and is less susceptible to deformation. This support prevents the heat exchange channel from collapsing, thereby maintaining a close fit between the collector and conduit end during welding. This reduces the likelihood of an increase in the weld gap between the plastic heat exchange plate and the conduit, helping to improve the sealing of the heat exchange assembly.

[0040] The details of one or more embodiments of the present application are set forth in the following drawings and description. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] FIG1 is a schematic structural diagram of a heat exchange assembly according to some embodiments.

[0043] FIG2 is an exploded schematic diagram of the heat exchange assembly shown in FIG1 .

[0044] FIG3 is a schematic cross-sectional view of a flow channel of a plastic heat exchange plate according to some embodiments.

[0045] FIG4 is a schematic structural diagram of a support member according to some embodiments.

[0046] FIG5 is a schematic structural diagram of support members according to other embodiments.

[0047] FIG6 is an enlarged view of point I in FIG2 .

[0048] FIG. 7 is a schematic structural diagram of a battery according to some embodiments.

[0049] The figure numbers in the specific implementation manner are as follows: 100, battery; 10, heat exchange component; 11, plastic heat exchange plate; 11a, heat exchange flow channel; 11b, collecting end; x, thickness direction; y, width direction; z, length direction; 12, busbar; 12A, first busbar; 12B, second busbar; 12c, busbar end; c1, cavity; 12d, second interface; 12e, first interface; 12i, step surface; 13, support member; 13f, support part; f1, first channel; f2, support surface; 13h, reinforcement rib; 13g, limit part; g1, limit surface; 20G, battery cell group; 20, battery cell; 21, pole; 30, thermal pad; 40, busbar. DETAILED DESCRIPTION

[0050] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0051] In the description of the present application, it should be understood that, if any, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0052] Furthermore, if used, the terms "first" and "second," if present, are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0053] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connected," and "fixed" should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0054] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0055] It should be noted that, if present, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0056] The present application addresses the issue of poor sealing performance when welding plastic heat exchange plates and manifolds, proposing a heat exchange assembly. This heat exchange assembly incorporates support members within the heat exchange channel corresponding to the welding area of ​​the heat exchange plate's current collector end. These support members support the inner wall of the heat exchange channel. When welding the heat exchange plate's current collector end to the manifold end, the support members prevent the heat exchange channel from deforming and collapsing due to welding heat, thereby reducing the risk of poor sealing performance.

[0057] The heat exchange assembly of the present invention can be applied to a battery, where the heat exchange assembly exchanges heat with the battery cells, and the heat exchange medium flowing through the heat exchange assembly dissipates or heats the battery cells. Typically, the heat exchange medium flowing through the heat exchange assembly is a cooling medium, such as water or a refrigerant.

[0058] A battery cell is the smallest charging and discharging unit in a battery. A battery cell can be a secondary battery or a primary battery. A battery cell can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell can be cylindrical, flat, rectangular, or in other shapes. The battery cell usually includes a shell, an electrode assembly housed between the shells, and an electrolyte disposed in the shell. The electrolyte can be solid or liquid. The electrode assembly usually includes a positive electrode sheet, a negative electrode sheet, and an isolation membrane separating the positive and negative electrode sheets. The battery cell usually also includes an explosion-proof structure, which is disposed on the battery shell. The explosion-proof structure can explode when the internal pressure of the battery cell reaches a relevant threshold, thereby connecting the inside and outside of the battery cell to relieve pressure. The explosion-proof structure can be an explosion-proof valve, notches, or other structures. The battery cell usually also includes a positive electrode column and a negative electrode column for connecting the battery cell to an external circuit.

[0059] The batteries in the embodiments of the present application can be used to provide power to electrical devices. These devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, and the like. For example, if the electrical device is a vehicle, the battery can be installed at the rear, front, or bottom of the vehicle, providing power for both the vehicle's drive and its control system.

[0060] The heat exchange component in the embodiment of the present application is introduced in detail below.

[0061] According to some embodiments of the present application, with reference to Figures 1 and 2, the heat exchange assembly 10 provided in the embodiments of the present application includes a plastic heat exchange plate 11, a manifold 12, and a support member 13. The plastic heat exchange plate 11 has a heat exchange channel 11a for circulating a heat exchange medium, and the plastic heat exchange plate 11 has a collecting end 11b. The heat exchange medium flows into and / or out of the heat exchange channel 11a from the collecting end 11b, and the outer surface of the collecting end 11b includes a welding area for welding. The manifold 12 connects the plastic heat exchange plate 11 and connects the heat exchange channel 11a with the outside world. The manifold 12 includes a manifold end 12c welded to the welding area. The support member 13 includes a support portion 13f provided in the heat exchange channel 11a, the support portion 13f abuts the inner wall of the heat exchange channel 11a corresponding to the welding area, and the melting point of the support member 13 is higher than the melting point of the plastic heat exchange plate 11.

[0062] The plastic heat exchange plate 11 is the primary component of the heat exchange assembly 10 for heat exchange. It is plate-shaped and can be either flat or curved, with shapes including, but not limited to, circular or square. The plastic heat exchange plate 11 is insulating, lightweight, easy to mold, and resistant to breakage. Typically, but not limited to, the plastic heat exchange plate 11 has a small dimension in the thickness direction x, while having a large surface area in this direction, which serves as the heat exchange surface for the battery cells 20.

[0063] The plastic heat exchange plate 11 has a heat exchange channel 11a for heat exchange medium to flow through. The heat exchange medium can be, but is not limited to, cooling water, refrigerant, etc., and the heat exchange medium can be gaseous, liquid, or a mixture of gas and liquid.

[0064] The liquid inlet and / or liquid outlet of the heat exchange channel 11a are located at the collecting end 11b, and the heat exchange medium flows into and / or flows out of the heat exchange channel 11a through the collecting end 11b. The plastic heat exchange plate 11 may have one, two, or more collecting ends 11b. When the plastic heat exchange plate 11 has one collecting end 11b, the liquid inlet and liquid outlet of the heat exchange channel 11a are located at the collecting end 11b, that is, the heat exchange channel 11a achieves liquid inlet and liquid outlet at the same collecting end 11b. For example, the heat exchange channel 11a is a U-shaped channel, and the liquid inlet and liquid outlet of the heat exchange channel 11a are located at the same collecting end 11b. When the plastic heat exchange plate 11 has multiple collecting ends 11b, the liquid inlet end of the heat exchange channel 11a can be located at the same collecting end 11b, and the liquid outlet end of the heat exchange channel 11a can be located at another collecting end 11b, so that liquid can be respectively introduced and discharged at different collecting ends 11b.

[0065] The manifold 12 is a component in the heat exchange assembly 10 for connecting to external pipelines to allow external heat exchange medium to enter the heat exchange channel 11a and / or allow the heat exchange medium in the heat exchange channel 11a to flow to the outside.

[0066] The conduit 12 has a conduit end 12c, which is connected and communicated with the collecting end 11b, and can connect the heat exchange channel 11a with the external pipeline. The welding area between the conduit end 12c and the collecting end 11b is welded, which can achieve a relatively reliable sealed connection between the two to avoid leakage. The welding area is usually a circle area set around the collecting end 11b. The welding position between the conduit end 12c and the collecting end 11b is not limited. For example, it can be between the end of the conduit end 12c and the end of the collecting end 11b, or between the inner peripheral surface of the conduit end 12c and the outer peripheral surface of the collecting end 11b. In addition, when welding the conduit end 12c and the collecting end 11b, solderless welding or soldering welding can be adopted, and the specific means are not limited. In order to improve the insulation effect of the heat exchange component 10, the conduit 12 is usually made of non-metallic material. Furthermore, the confluence piece 12 and the plastic heat exchange plate 11 are both made of plastic, and the confluence end 12c and the collecting end 11b can be easily connected together by heat melting during welding.

[0067] Typically, one manifold 11b is connected to a corresponding conduit 12c. If the manifold 11b can both inlet and outlet liquids, then the manifold 12 is also configured with a corresponding inlet and outlet channel. If the manifold 11b is only for inlet or outlet liquids, then the manifold 12 only needs to be configured with an inlet channel or an outlet channel. Those skilled in the art can make conventional arrangements regarding the specific structure of the manifold 12.

[0068] The support member 13 includes a support portion 13f, which is disposed within the heat exchange channel 11a and abuts against the inner wall of the heat exchange channel 11a corresponding to the welding area to support the heat exchange channel 11a. The melting point of the support member 13 is higher than that of the plastic heat exchange plate 11. Specifically, the support member 13 can be made of metal, ceramic, or high-melting-point plastic.

[0069] Understandably, the support portion 13f should be configured to maintain connectivity between the heat exchange channel 11a and the converging end 12c. The support portion 13f may be a support rib, support column, support ring, or the like disposed within the heat exchange channel 11a. The support portion 13f may be made of metal, ceramic, or other high-temperature-resistant material. When the converging end 12c and the collecting end 11b are welded, it should be able to withstand the welding heat source with minimal deformation, thereby effectively supporting the heat exchange channel 11a.

[0070] When welding the current collecting end 11b and the converging end 12c, the welding heat can easily soften the plastic heat exchange plate 11 corresponding to the welding area, causing the heat exchange channel 11a corresponding to the welding area to collapse. At this time, due to the high melting point of the support member 13, the support portion 13f can withstand the high welding temperature and is not easily deformed. With the support of the support portion 13f, the collapse of the heat exchange channel 11a is prevented, thereby maintaining the contact between the current collecting end 11b and the converging end 12c during the welding process, reducing the probability of increasing the welding gap between the plastic heat exchange plate 11 and the converging member 12, and helping to improve the sealing performance of the heat exchange assembly 10.

[0071] In some embodiments, referring to Figures 2, 4, and 5, the support portion 13f has a first channel f1 that connects the heat exchange channel 11a and the manifold 12. Specifically, the first channel f1 is machined on the support portion 13f. The design of the first channel f1 can increase the flow rate of the heat exchange medium at the collecting end 11b, thereby improving the heat exchange effect.

[0072] For example, the support portion 13f is a support rod, which extends along the thickness direction x of the plastic heat exchange plate 11 and is arranged in the heat exchange flow channel 11a located at the collecting end 11b. A through hole serving as the first channel f1 is provided on the support rod to increase the flow area.

[0073] Further to the embodiment, with reference to FIG. 3 and FIG. 4 , the support portion 13 f continuously abuts against the inner wall of the heat exchange channel 11 a along the circumference of the heat exchange channel 11 a and encloses itself to form the first channel f1 .

[0074] The support portion 13f is generally tubular, and may be circular, square, or otherwise. The support portion 13f continuously abuts the inner wall of the heat exchange channel 11a along its circumference. Specifically, the outer wall of the support portion 13f conforms to the inner wall of the heat exchange channel 11a. Typically, the outer wall of the tubular portion f3 forms an interference fit with the inner wall of the heat exchange channel 11a.

[0075] At this time, the outer wall surface of the support portion 13f can completely abut against the inner wall surface of the heat exchange channel 11a, and the contact area between the two is large, so the support portion 13f has a better supporting effect on the heat exchange channel 11a.

[0076] The wall thickness of the tubular support portion 13f can be 0.2mm-0.5mm. This thickness balances the flow area of ​​the first channel f1 with the strength of the support portion 13f. If the wall thickness is less than 0.2mm, the support portion 13f is too weak and may be damaged during the insertion process, which also increases the processing difficulty. If the wall thickness is greater than 0.5mm, the flow area of ​​the first channel f1 is excessively encroached, resulting in reduced cooling effect.

[0077] Understandably, when the outer wall surface of the support portion 13f continuously abuts the inner wall surface of the heat exchange channel 11a along the circumferential direction, fluid flow between the heat exchange channel 11a and the manifold 12 is achieved through the first channel f1 within the support portion 13f. Of course, in other embodiments, the support portion 13f may only contact and abut the inner wall surfaces on both sides of the heat exchange channel 11a in the thickness direction x. In addition to being connected through the first channel f1, the heat exchange channel 11a and the manifold 12 may also be connected through the space between the support portion 13f and the heat exchange channel 11a.

[0078] In some embodiments, referring to FIG. 5 , the support member 13 includes a reinforcing rib 13 h . The reinforcing rib 13 h is located in the first channel f1 and supports the inner wall of the first channel f1 .

[0079] Understandably, a larger flow area in the first channel f1 contributes to a greater overall flow area in the heat exchange channel 11a. When the flow area in the first channel f1 is large, the wall thickness of the support portion 13f is often thinner. In this case, reinforcing ribs 13h are provided within the first channel f1 of the support portion 13f. These ribs reinforce the strength of the support portion 13f, providing a strong support effect even with a relatively thin wall thickness. This allows for a larger flow capacity in the first channel f1, thereby increasing the flow capacity in the heat exchange channel 11a and improving the heat exchange efficiency of the heat exchange assembly 10.

[0080] The reinforcing rib 13h and the supporting portion 13f may be integrally formed.

[0081] 5 and 6 , the outer wall of the support portion 13f includes a support surface f2 located in the thickness direction x of the plastic heat exchange plate 11 , and the support surface f2 is in planar contact with the inner wall of the corresponding heat exchange channel 11a .

[0082] The support surface f2 is a flat surface that forms planar contact with the inner wall of the heat exchange channel 11a. Specifically, the planar support surface f2 can be located at one or both ends of the support portion 13f in the thickness direction x of the plastic heat exchange plate 11. The support portion 13f forms planar contact with the inner wall of the heat exchange channel 11a via the support surface f2. This large support surface f2 provides a more consistent support effect and facilitates molding.

[0083] Of course, in other embodiments, the support surface f2 may be a cambered surface, a curved surface, etc.

[0084] In some embodiments, the support portion 13f abuts against a partial inner wall of the heat exchange channel 11a in the circumferential direction, and the support portion 13f is formed with a first channel f1 open toward the inner wall of the heat exchange channel 11a.

[0085] In other words, compared to the tubular structure formed by the support portion 13f continuously contacting the inner wall of the heat exchange channel 11a along the circumference of the heat exchange channel 11a, in this embodiment, the support portion 13f only contacts the inner wall of the heat exchange channel 11a along a portion of the circumference. In this case, the support portion 13f can be in an I-shape, U-shape, C-shape, H-shape, K-shape, or other shape to form the first channel f1 open to the inner wall of the heat exchange channel 11a.

[0086] At this time, the supporting portion 13f can be constructed in various ways.

[0087] It should be noted that when the support portion 13f itself does not form the first channel f, for example, the support portion 13f is a solid columnar structure, there should be a gap between the support portion 13f and the inner wall of the heat exchange channel 11a to allow the heat exchange medium to flow.

[0088] In some embodiments, as understood in conjunction with FIG. 2 , FIG. 4 and FIG. 5 , the support member 13 includes a limiting portion 13 g connected to the supporting portion 13 f , and the limiting portion 13 g can limit the axial movement of the supporting portion 13 f in the heat exchange channel 11 a .

[0089] The axial direction of the heat exchange channel 11a is substantially the same as the extending direction of the heat exchange channel 11a. The circumferential direction of the heat exchange channel 11a mentioned above is a direction arranged around the extending direction of the heat exchange channel 11a.

[0090] There are many ways to achieve position limiting for the limiting portion 13g, which are not exhaustive here. For example, the limiting portion 13g may be provided with a slot, and the manifold 12 or the heat exchange channel 11a may be provided with a ridge that engages with the slot. Another example is that the limiting portion 13g is bonded to the manifold 12.

[0091] At this time, the limiting portion 13g is used to axially limit the support portion 13f, thereby reducing the probability of the support portion 13f being displaced under the flow impact of the heat exchange medium and facilitating the positioning of the support portion 13f.

[0092] In some embodiments, as understood in conjunction with Figures 2, 4, 5, and 6, the converging end 12c has a concave cavity c1, into which the stopper 13g is inserted. The stopper 13g has a stopper surface g1, which is located at the same end of the stopper 13g as the support portion 13f. The collecting end 11b is inserted into the concave cavity c1, with its end surface abutting against the stopper surface g1. A stepped surface 12i is formed within the concave cavity c1, abutting against the end of the stopper 13g facing away from the stopper surface g1.

[0093] The limiting surface g1 and the support portion 13f are located on the end of the limiting portion 13g that faces the current collecting end 11b. One end of the cavity c1 is open toward the current collecting end 11b and can communicate with external piping. The stepped surface 12i forms a portion of the inner wall of the cavity c1, located toward the opening of the cavity c1. This surface abuts against the end surface of the limiting portion 13g in the insertion direction of the limiting portion 13g, thereby limiting the insertion depth of the limiting portion 13g.

[0094] The limiting portion 13g is inserted into the confluence end 12c. The limiting portion 13g can provide a certain support for the confluence end 12c, reduce the welding heat that causes the flow channel in the confluence end 12c to deform, improve the circulation effect of the heat exchange medium in the heat exchange component 10, and thereby improve the heat exchange effect of the heat exchange component 10.

[0095] Furthermore, the support portion 13 is an independent component consisting of the support portion 13f and the limiting portion 13g. Compared with directly integrally forming the support portion 13 on the converging end 12c or the collecting end 11b, it is easier to process and more convenient to assemble.

[0096] The step surface 12i may extend in a circular shape along the circumference of the converging end 12c, or may be provided with a plurality of stepped surfaces 12i spaced apart along the circumference of the converging end 12c. Regarding the specific structure and arrangement of the step surface 12i, those skilled in the art may make conventional arrangements.

[0097] In actual production, the limiting portion 13g is first inserted into the concave cavity c1 until it abuts against the step surface 12i, and then the collecting end 11b is inserted into the concave cavity c1 until it abuts against the limiting surface g1. During the insertion process of the collecting end 11b, the heat exchange channel 11a on it is plugged into the supporting portion 13f, and the supporting portion 13f is inserted into the heat exchange channel 11a.

[0098] Thus, the arrangement of the stepped surface 12i and the limiting surface g1 allows for rapid positioning between the current collecting end 11b and the support portion 13f, and between the current collecting end 11b and the converging end 12c, facilitating subsequent welding. Furthermore, the limiting portion 13g is axially limited by the current collecting end 11b and the stepped surface 12i, providing a reliable and easy-to-operate limiting method.

[0099] It can be understood that the support portion 13f is protruding toward the collecting end 11b relative to the limiting surface g1, so that the support portion 13f can be smoothly inserted into the heat exchange channel 11a.

[0100] In some embodiments, the outer wall surface of the limiting portion 13g fits the inner wall surface contour of the cavity c1, and the limiting portion 13g has a second channel connecting the heat exchange channel 11a and the confluence piece 12, and the flow area of ​​the second channel is larger than the flow area of ​​the heat exchange channel 11a.

[0101] The contour of the outer wall of the limiting portion 13g is adapted to the contour of the inner wall of the cavity c1, so that the outer wall of the limiting portion 13g can completely fit with the inner wall of the cavity c1. The contact area between the limiting portion 13g and the confluence end 12c is large, and the limiting portion 13g has a better supporting effect on the confluence end 12c.

[0102] At this time, the heat exchange medium can only flow between the heat exchange channel 11a and the external pipeline through the second channel. The flow area of ​​the second channel is set to be larger than the flow area of ​​the heat exchange channel 11a, which means that the flow volume of the second channel is higher than the flow volume of the heat exchange channel 11a, which can reduce the impact of the setting of the limit part 13g on the flow of the heat exchange channel 11a.

[0103] The flow area of ​​the second channel is greater than the flow area of ​​heat exchange channel 11a, meaning that the total flow area of ​​the second channel is greater than the sum of the flow areas of heat exchange channels 11a. A single second channel may be provided, while multiple heat exchange channels 11a may be provided. The flow area refers to the cross-sectional area of ​​the channel.

[0104] In other embodiments, the outer wall profile of the limiting portion 13g may only fit with a portion of the inner wall of the cavity c1, while a flow space exists between the outer wall profile of the limiting portion 13g and the other portion of the inner wall of the cavity c1.

[0105] In some embodiments, the outer circumference of the current collecting end 11 b is flush with the outer circumference of the limiting portion 13 g , or the outer circumference of the current collecting end 11 b protrudes from the outer circumference of the limiting portion 13 g .

[0106] The outer peripheral surface of the current collecting end 11 is the outer wall surface arranged around the circumference thereof. The outer peripheral surface of the position limiting portion 13g is the outer wall surface arranged around the circumference thereof. The outer wall surfaces of both are used to face the inner wall of the cavity c1.

[0107] At this time, the outer circumferential surface of the current collecting end 11b is flush with the outer circumferential surface of the limiting portion 13g or the former protrudes relative to the latter, which not only makes it easier for the limiting portion 13g to be inserted into the groove c1, but also helps to reduce the gap between the outer circumferential surface of the current collecting end 11b and the inner wall of the cavity c1, thereby improving the welding effect.

[0108] In some embodiments, multiple support portions 13f are provided on the same end of the limiting portion 13g. Thus, the positioning of multiple support portions 13f can be achieved by only installing the limiting portion 13g once, making the assembly of the support portions 13f and the heat exchange channel 11a at the collecting end 11b faster and more convenient.

[0109] In one embodiment, the support portion 13 f abuts against the inner wall of the heat exchange channel 11 a at least in the thickness direction of the plastic heat exchange plate 11 .

[0110] Typically, the plastic heat exchange plate 11 is relatively small in its thickness direction x, and its current collecting end 11b is also typically relatively small in this thickness direction x, resulting in a relatively small size of the heat exchange channel 11a located at the current collecting end 11b in this thickness direction x. When welding the current collecting end 11b and the converging end 12c, the heat from welding can easily soften and deform the plastic heat exchange plate 11, causing the heat exchange channel 11a to collapse in this thickness direction x. In this case, the support portion 13f can support the heat exchange channel 11a in this thickness direction x. Specifically, the support portion 13f can support the portion of the heat exchange channel 11a near the welding heat source in this thickness direction x, preventing the heat exchange channel 11a from collapsing in this thickness direction x, thereby ensuring that the heat exchange channel 11a remains unobstructed.

[0111] In some embodiments, in combination with Figure 3, the inner diameter d1 of the heat exchange channel 11a in the thickness direction x of the plastic heat exchange plate 11, and the inner diameter d2 of the heat exchange channel 11a in a direction perpendicular to its extension direction and the thickness direction x of the plastic heat exchange plate 11, satisfy: d1<d2.

[0112] Specifically, if the plastic heat exchange plate 11 is a rectangular plate and the extension direction of the heat exchange channel 11a corresponds to its length direction z, then the direction perpendicular to both the extension direction of the heat exchange channel 11a and the thickness direction x of the plastic heat exchange plate 11 can be the width direction y of the plastic heat exchange plate 11.

[0113] The longitudinal direction of the cross section of heat exchange channel 11a corresponds to the thickness direction x of plastic heat exchange plate 11. The transverse direction within the cross section of heat exchange channel 11a is perpendicular to both the extension direction of heat exchange channel 11a and the thickness direction x of plastic heat exchange plate 11. In the cross section of heat exchange channel 11a, its longitudinal inner diameter is d1, and its transverse inner diameter is d2.

[0114] At this time, d2 is greater than d1, the cross-sectional shape of the heat exchange channel 11a is flat, and the contact area between the cooling medium flowing through the heat exchange channel 11a and the heat exchange surface of the plastic heat exchange plate 11 in the thickness direction x is large, which helps to improve the heat exchange efficiency of the heat exchange component 10.

[0115] In some embodiments, d1 and d2 satisfy: 1 ​​mm ≤ d1 ≤ 5 mm, 5 mm ≤ d2 ≤ 20 mm.

[0116] Specifically, d1 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or any value between adjacent values. d2 can be 5 mm, 8 mm, 10 mm, 12 mm, 15 mm, 18 mm, 20 mm, or any value between adjacent values.

[0117] In this case, heat exchange channel 11a is a small, microporous channel. This design helps reduce the thickness of the plastic heat exchange plate 11, minimizing the space it occupies and improving the internal space utilization of the battery 100. Furthermore, when d1 and d2 are within the aforementioned range, the microporous channel is more flat, further enhancing the heat exchange efficiency of the plastic heat exchange plate 11. Furthermore, the provision of support portions 13f within heat exchange channel 11a effectively reduces the risk of heat exchange channel 11a deforming and collapsing due to heat, significantly ensuring the patency of the microporous channel.

[0118] In the embodiment, 1mm≤d1≤2mm. When d1 is within this small range, the microporous flow channel can be flattened to a greater degree while maintaining the same flow area. The heat exchange medium can more quickly remove heat from the battery cell 20, further improving the heat exchange efficiency of the plastic heat exchange plate 11.

[0119] In some embodiments, as understood in conjunction with FIG. 3 , the thickness H of the plastic heat exchange plate 11 satisfies: 1 mm ≤ H − d1 ≤ 5 mm.

[0120] The thickness H of the plastic heat exchange plate 11 refers to its dimension in the thickness direction x. Generally, the thickness of the plastic heat exchange plate 11 is uniform everywhere. The difference between the thickness H of the plastic heat exchange plate 11 and the inner diameter d1 of the heat exchange channel 11a is between 1mm and 2mm. Specifically, the difference can be 1mm, 2mm, 3mm, 4mm, 5mm, and any value between adjacent values. Generally, the wall thickness between the heat exchange channel 11a and the outer wall of the plastic heat exchange plate 11 is the same, and the wall thickness of this portion can be equal to (H-d1) / 2. Specifically, the wall thickness of this portion (H-d1) / 2 can be 1mm-2mm.

[0121] When H-d1 is within the above range, the portion of the plastic heat exchange plate 11 corresponding to the heat exchange channel 11a is thinner, resulting in better thermal conductivity. Furthermore, the presence of support portion 13f within the heat exchange channel 11a effectively reduces the risk of thermal deformation and collapse of the heat exchange channel 11a, even with a relatively thin wall thickness. This significantly helps ensure the patency of the microporous channel.

[0122] In some embodiments, the plastic heat exchange plate 11 has a plurality of heat exchange channels 11 a , all of which are arranged at intervals along the width direction y of the plastic heat exchange plate 11 , and a support portion 13 f is correspondingly provided in each heat exchange channel 11 a .

[0123] The width direction y of the plastic heat exchange plate 11 is approximately perpendicular to its thickness direction x. Multiple heat exchange channels 11a are spaced apart along the width direction y of the plastic heat exchange plate 11. The inner wall of the plastic heat exchange plate 11 exists between each heat exchange channel 11a, which enhances the strength of the plastic heat exchange plate 11. Furthermore, the provision of multiple heat exchange channels 11a ensures a more uniform distribution of the heat exchange medium within the plastic heat exchange plate 11.

[0124] Specifically, the heat exchange channels 11a can be independently arranged without direct communication. Specifically, there can be a connection point between the heat exchange channels 11a. There are many ways to arrange the heat exchange channels 11a within the plastic heat exchange plate 11, which are not exhaustive here. Those skilled in the art can make conventional arrangements.

[0125] In some embodiments, both opposite ends of the plastic heat exchange plate 11 are current collecting ends 11 b , the heat exchange channel 11 a extends from one of the current collecting ends 11 b to the other current collecting end 11 b , and each current collecting end 11 b is welded with a collector 12 .

[0126] The heat exchange channel 11a can extend in a straight line or in a curve. Taking the plastic heat exchange plate 11 as a rectangular plate as an example, specifically, the two ends of the plastic heat exchange plate 11 in the length direction z can serve as the collecting ends 11b.

[0127] In practical applications, one of the two collecting ends 11b can be used for liquid inlet and the other for liquid outlet. This not only makes the plastic heat exchange plate 11 easier to process and shape, but also facilitates clearer connection pipelines.

[0128] In some embodiments, the plastic heat exchange plate 11 is made of one or more of PPS, PPA, and PA. PPS (polyphenylene sulfide), PPA (polyphthalamide), and PA (polyamide) are relatively common plastic materials with good electrical insulation, low cost, and corrosion resistance. Specifically, PA materials such as PA12 and PA62 can be used.

[0129] At this time, the plastic heat exchange plate 11 has good electrical insulation performance, low price and long service life.

[0130] In one embodiment of the present application, referring to Figures 1 to 4, a heat exchange assembly 10 includes a plastic heat exchange plate 11, a manifold 12, and a support member 13. The welding area of ​​the collecting end 11b of the plastic heat exchange plate 11 is welded to the collecting end 12c of the manifold 12. The support member 13 includes a limiting portion 13g and a supporting portion 13f. The limiting portion 13g is inserted and sleeved into the concave cavity c1 of the manifold 12c and abuts against the step surface 12i. The collecting end 11b is inserted and sleeved into the concave cavity c1 and abuts against the limiting surface g1 of the limiting portion 13g. Multiple supporting portions 13f are arranged on the same side of the limiting portion 13g and are inserted and sleeved into the multiple heat exchange channels 11a in the plastic heat exchange plate 11. The supporting portions 13f are sleeved with the heat exchange channels 11a in which they are located. A first channel f1 is formed on the support portion 13f, and a second channel is formed on the stop portion 13g. The second channel communicates with the heat exchange channel 11a via the first channel f1. Opposite ends of the plastic heat exchange plate 11 are current collectors 11b, each of which is provided with a manifold 12. One manifold 12 has a first port 12e and a second port 12d that communicate with each other, while the other manifold 12 has only the second port 12d.

[0131] In addition, an embodiment of the present application also provides a battery 100. Referring to Figure 7, the battery 100 includes a battery cell 20 and a heat exchange assembly 10 in any of the above embodiments. The plastic heat exchange plate 11 of the heat exchange assembly 10 has at least one side surface in its thickness direction x for thermal connection with the battery cell 20.

[0132] The battery 100 utilizes the heat exchange assembly 10 in the above embodiment to exchange heat for the battery cell 20 , and the heat exchange effect of the battery cell 20 is good.

[0133] In some embodiments, referring to FIG. 7 , a plurality of battery cells 20 are adjacently arranged to form a battery cell group 20G. A pole 21 is protruded from the same side of each battery cell 20 in each battery cell group 20G. The plurality of poles 21 in the battery cell group 20G are thermally connected to the same plastic heat exchange plate 11 .

[0134] As noted above, the poles 21 of the battery cell 20 include a positive pole 21 and a negative pole 21, which connect the battery cell 20 to the external circuit. Due to its insulating properties, the plastic heat exchange plate 11 can be used directly to dissipate heat from the poles 21, where heat is more pronounced, providing improved heat dissipation for the battery cell 20.

[0135] Specifically, the same plastic heat exchange plate 11 can be thermally connected to all poles 21 in the cell group 20G. Alternatively, poles 21 with the same polarity in the cell group 20G can be thermally connected to the same plastic heat exchange plate 11, while poles 21 with different polarities can be thermally connected to different plastic heat exchange plates 11.

[0136] At this time, the heat exchange efficiency of the plastic heat exchange plate 11 is relatively high.

[0137] Of course, in other embodiments, the plastic heat exchange plate 11 can also be used to exchange heat with the side surfaces of the battery cell 20. Typically, the poles 21 of the battery cell 20 are located on the top and / or bottom surfaces of the battery cell 20, and the side surfaces of the battery cell 20 are surfaces arranged around the top and bottom surfaces.

[0138] In addition, in other embodiments, a conventional liquid cooling structure may be added inside the battery 100 to cool the side surfaces of the battery cells 20 , thereby further improving the heat dissipation effect of the battery cells 20 .

[0139] In some embodiments, referring to FIG. 7 , the battery 100 includes a thermal pad 30 and a bus bar 40 . The bus bar 40 is electrically connected to the poles 21 of the cell group 20G. The thermal pad 30 is disposed between the bus bar 40 and the plastic heat exchange plate 11 .

[0140] The thermal pad 30 can be a silicone pad, which is typically insulating. The busbar 40 is a metal bar, such as a copper bar, used to electrically connect the electrode 21 to the external circuit. Typically, all positive electrode posts 21 in a cell group 20G are electrically connected to one busbar 40, and all negative electrode posts 21 are electrically connected to another busbar 40. There is no electrical contact between the two busbars 40.

[0141] At this time, the plastic heat exchange plate 11 is connected to the bus 40 through the thermal pad 30, which can improve the insulation reliability of the battery cell group 20G. At the same time, the plastic heat exchange plate 11 can exchange heat with the poles 21 of multiple battery cells 20 through the bus 40. The bus 40 increases the heat exchange area, which helps to improve the heat exchange efficiency.

[0142] In some embodiments, as understood in conjunction with Figures 1 and 7 , each battery cell group 20G is configured with at least one pair of heat exchange assemblies 10. The two plastic heat exchange plates 11 in each pair of heat exchange assemblies 10 are thermally connected to the poles 21 of the battery cell group 20G, one-to-one. Each heat exchange assembly 10 includes a first busbar 12A and a second busbar 12B, and its plastic heat exchange plates 11 are connected between the first busbar 12A and the second busbar 12B. The first busbar 12A has a first interface 12e and a second interface 12d that are connected, and the second busbar 12B has a second interface 12d. In each pair of heat exchange assemblies 10, the second interface 12d of the first busbar 12A of any heat exchange assembly 10 is connected to the second interface 12d of the second busbar 12B of the other heat exchange assembly 10.

[0143] The first interface 12e is used to connect the current collector 12 with an external medium source, and the second interface 12d is used to connect the current collectors 12. On the first current collector 12A, the first interface 12e is connected to the second interface 12d.

[0144] In actual application, the first interface 12e of the first conduit 12A of one of the heat exchange components 10 can be connected to the external medium source as a liquid inlet interface, and the first interface 12e of the first conduit 12A of the other heat exchange component 10 can be connected to the external medium source as a liquid outlet interface, and the second conduits 12B of the two heat exchange components 10 are connected to each other through the second interface 12d. There is no need to set up liquid inlet interfaces and liquid outlet interfaces for both heat exchange components 10, which can reduce pipeline connections and reduce pipeline configuration costs.

[0145] Specifically, the first interface 12e and the second interface 12d may be arranged on different sides of the first busbar 12A.

[0146] In addition, an embodiment of the present application further provides an electrical device, comprising the battery 100 in any of the above embodiments, wherein the battery 100 is used to provide electrical energy.

[0147] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0148] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A heat exchange assembly (10), comprising: A plastic heat exchange plate (11) has a heat exchange flow channel (11a) for circulating a heat exchange medium, and the plastic heat exchange plate (11) has a collecting end (11b); the heat exchange medium flows into and / or flows out of the heat exchange flow channel (11a) from the collecting end (11b), and the outer surface of the collecting end (11b) includes a welding area for welding; A confluence piece (12) is connected to the plastic heat exchange plate (11) and connects the heat exchange channel (11a) with the outside world, and the confluence piece (12) includes a confluence end (12c) welded to the welding area; and The support member (13) comprises a support portion (13f) provided in the heat exchange channel (11a), the support portion (13f) abutting against an inner wall of the heat exchange channel (11a) corresponding to the welding area, and the melting point of the support member (13) is higher than the melting point of the plastic heat exchange plate (11).

2. The heat exchange assembly (10) according to claim 1, wherein: The supporting portion (13f) has a first channel (f1), and the first channel (f1) communicates with the heat exchange channel (11a) and the confluence piece (12).

3. The heat exchange assembly (10) according to claim 2, wherein: The support portion (13f) continuously abuts against the inner wall of the heat exchange channel (11a) along the circumference of the heat exchange channel (11a), and encloses itself to form the first channel (f1).

4. The heat exchange assembly (10) according to claim 3, wherein: The support member (13) includes a reinforcing rib (13h), and the reinforcing rib (13h) is located in the first channel (f1) and supports the inner wall of the first channel (f1).

5. The heat exchange assembly (10) according to claim 2, wherein: The support portion (13f) abuts against a partial inner wall of the heat exchange channel (11a) in the circumferential direction, and the support portion (13f) is formed with the first channel (f1) open toward the inner wall of the heat exchange channel (11a).

6. The heat exchange assembly (10) according to any one of claims 1 to 5, wherein: The support member (13) further includes a limiting portion (13g) connected to the supporting portion (13f), and the limiting portion (13g) is capable of limiting the axial movement of the supporting portion (13f) in the heat exchange flow channel (11a).

7. The heat exchange assembly (10) according to claim 6, wherein: The confluence end (12c) has a concave cavity (c1), and the limiting portion (13g) is inserted into the concave cavity (c1); The limiting portion (13g) has a limiting surface (g1), and the limiting surface (g1) and the supporting portion (13f) are arranged at the same end of the limiting portion (13g); the collecting end (11b) is inserted into the concave cavity (c1), and its end surface abuts against the limiting surface (g1); A step surface (12i) is formed in the concave cavity (c1), and the step surface (12i) abuts against an end of the limiting portion (13g) that is away from the limiting surface (g1).

8. The heat exchange assembly (10) according to claim 7, wherein: The outer wall surface of the limiting portion (13g) is adaptively fitted with the inner wall surface contour of the concave cavity (c1); the limiting portion (13g) has a second channel connecting the heat exchange flow channel (11a) and the confluence piece (12); the flow area of ​​the second channel is larger than the flow area of ​​the heat exchange flow channel (11a).

9. The heat exchange assembly (10) according to claim 6, wherein: The outer peripheral surface of the current collecting end (11b) is flush with the outer peripheral surface of the limiting portion (13g), or the outer peripheral surface of the current collecting end (11b) protrudes from the outer peripheral surface of the limiting portion (13g).

10. The heat exchange assembly (10) according to claim 7, wherein: A plurality of support portions (13f) are provided at the same end of the limiting portion (13g).

11. The heat exchange assembly (10) according to any one of claims 1 to 10, wherein: The supporting portion (13f) abuts against the inner wall of the heat exchange channel (11a) at least in the thickness direction (x) of the plastic heat exchange plate (11).

12. The heat exchange assembly (10) according to claim 11, wherein: The inner diameter d1 of the heat exchange channel (11a) in the thickness direction (x) of the plastic heat exchange plate (11), and the inner diameter d2 of the heat exchange channel (11a) in a direction perpendicular to both its extension direction and the thickness direction (x) of the plastic heat exchange plate (11) satisfy: d1<d2.

13. The heat exchange assembly (10) according to claim 12, wherein: The d1 and d2 satisfy: 1mm≤d1≤5mm, 5mm≤d2≤20mm; The thickness H of the plastic heat exchange plate (11) satisfies: 1mm≤H-d1≤5mm; and / or, 1mm≤d1≤2mm.

14. The heat exchange assembly (10) according to any one of claims 1 to 13, wherein: The plastic heat exchange plate (11) has a plurality of heat exchange channels (11a), all of which are arranged at intervals along the width direction (y) of the plastic heat exchange plate (11); and the support portion (13f) is correspondingly provided in each heat exchange channel (11a); And / or, both opposite ends of the plastic heat exchange plate (11) are the collecting ends (11b), the heat exchange channel (11a) extends from one of the collecting ends (11b) to the other of the collecting ends (11b), and each of the collecting ends (11b) is welded with the collecting piece (12).

15. The heat exchange assembly (10) according to any one of claims 1 to 14, wherein: The plastic heat exchange plate (11) is made of one or more materials selected from the group consisting of PPS, PPA, and PA.

16. A battery (100), wherein: include: a plurality of battery cells (20); And the heat exchange assembly (10) according to any one of claims 1 to 15, wherein at least one side surface of the plastic heat exchange plate (11) in its thickness direction (x) is used for thermal connection with the battery core (20).

17. The battery (100) according to claim 16, wherein A plurality of battery cells (20) are arranged adjacent to each other to form a battery cell group (20G); a pole (21) is protruding from the same side of each battery cell (20) in each battery cell group (20G); and a plurality of poles (21) in the battery cell group (20G) are thermally connected to the same plastic heat exchange plate (11).

18. The battery (100) according to claim 17, wherein The battery (100) comprises a thermal pad (30) and a busbar (40), wherein the busbar (40) is electrically connected to the pole (21) of the battery cell group (20G), and the thermal pad (30) is arranged between the busbar (40) and the plastic heat exchange plate (11).

19. The battery (100) according to claim 18, wherein Each of the battery cell groups (20G) is correspondingly configured with at least one pair of the heat exchange components (10); the two plastic heat exchange plates (11) in each pair of the heat exchange components (10) are heat-conductively connected to the poles (21) of different polarities of the battery cell group (20G) in a one-to-one correspondence; Each heat exchange assembly (10) includes a first confluence piece (12A) and a second confluence piece (12B), and the plastic heat exchange plate (11) is connected between the first confluence piece (12A) and the second confluence piece (12B), the first confluence piece (12A) has a first interface (12e) and a second interface (12d) that are connected, and the second confluence piece (12B) has a second interface (12d); In each pair of the heat exchange components (10), the second interface (12d) of the first flow conduit (12A) of any one of the heat exchange components (10) is in communication with the second interface (12d) of the second flow conduit (12B) of the other heat exchange component (10).

20. An electrical device, wherein: The invention comprises a battery (100) according to any one of claims 16 to 19, wherein the battery (100) is used for providing electrical energy.

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