Thermal management assembly and battery

Abstract

The utility model provides a thermal management assembly and a battery, and relates to the technical field of batteries. The heat management assembly comprises a first water cooling plate, a second water cooling plate and a third water cooling plate which are sequentially stacked. A first gradient runner is formed between one side of the second water-cooling plate and the first water-cooling plate, and a second gradient runner is formed between the other side of the second water-cooling plate and the third water-cooling plate; the first gradient flow channel communicates with the second gradient flow channel, and the flow direction of fluid in the first gradient flow channel is opposite to the flow direction of fluid in the second gradient flow channel. The heat management assembly solves the technical problems that in the prior art, a stamping water cooling plate is large in occupied space, the temperature difference between an inlet and an outlet cannot be balanced, and the heat exchange efficiency is low.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a thermal management component and a battery. Background Art

[0002] Among the existing power battery thermal management water cooling plate design solutions, stamping water cooling plates have become the mainstream solution for battery system thermal management design due to their advantages such as convenient flow channel design and high process maturity. However, the stamping cold plate solution has the following problems:

[0003] 1) Currently, stamped liquid cooling plates are welded by an upper flat plate and a lower flow channel plate. The depth of the stamped flow channel is generally 3mm to 4mm. During installation, the upper flat plate must be fitted with the power battery for heat exchange. The lower flow channel plate requires a relatively large Z-direction installation space due to the stamping height. However, the current vehicle structure layout has relatively stringent requirements on the height dimension to ensure the safe height between the vehicle chassis and the ground. Therefore, the compatibility of stamped water cooling plate battery packs in the height direction is relatively poor;

[0004] 2) For a multi-layer battery system, that is, the battery modules are arranged in upper and lower structures, it is necessary to perform thermal management design on each layer of battery modules. For example, according to the existing technical solution, since the stamped water-cooled plate has the structural characteristics of the flow channel stamping groove, it is impossible to meet the requirement that the upper and lower layers of battery modules share one water-cooled plate, that is, at least two stamped liquid-cooled plates are required to meet the thermal management design requirements, which not only wastes installation space but also increases design cost and the weight of the whole package;

[0005] 3) When designing the flow channel of the liquid cooling system, the change in the heat exchange amount of the fluid medium along the flow channel causes a temperature gradient change, so there will be a large temperature difference between the batteries in the inlet and outlet areas;

[0006] 4) The flow channel of the stamped water-cooled plate is brazed with the upper plate after stamping. On the one hand, since there are only air layers on both sides of the stamped flow channel, heat dissipation occurs, which also means that heat exchange can only pass through the upper plate area; on the other hand, since only the upper plate surface exchanges heat, the heat exchange area is small, so the heat exchange efficiency of the entire cold plate is low. Utility Model Content

[0007] The utility model aims to provide a thermal management component and a battery to alleviate the technical problems existing in the prior art that the stamped water cooling plate occupies a large space, the inlet and outlet temperature difference cannot be balanced, and the heat exchange efficiency is low.

[0008] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0009] In a first aspect, the thermal management assembly provided by the utility model comprises a first water-cooling plate, a second water-cooling plate and a third water-cooling plate stacked in sequence;

[0010] A first gradient flow channel is formed between one side of the second water-cooling plate and the first water-cooling plate, and a second gradient flow channel is formed between the other side of the second water-cooling plate and the third water-cooling plate;

[0011] The first gradient flow channel is communicated with the second gradient flow channel, and a flow direction of a fluid in the first gradient flow channel is opposite to a flow direction of a fluid in the second gradient flow channel.

[0012] Furthermore, the width of the first gradient flow channel is smaller than the width of the second gradient flow channel.

[0013] Furthermore, the first gradient flow channel includes a plurality of first flow channels connected in sequence, and the second gradient flow channel includes a plurality of second flow channels;

[0014] The plurality of second flow channels are disposed adjacent to the plurality of first flow channels in a one-to-one correspondence, and the flow direction of the fluid in the second flow channel is opposite to the flow direction of the fluid in the adjacent first flow channel.

[0015] Furthermore, the first gradient flow channel includes a plurality of first flow channels connected in sequence, and the second gradient flow channel includes two second flow channels connected in parallel, and the two second flow channels are respectively located on both sides of the first flow channel;

[0016] The flow direction of the fluid in the second flow channel is opposite to the flow direction of the fluid in the adjacent first flow channel.

[0017] Furthermore, a width of the second flow channel located outside the first flow channel is greater than a width of the second flow channel located inside the first flow channel.

[0018] Furthermore, a plurality of grooves are provided at intervals on the surface of the second water-cooling plate close to the first water-cooling plate, the first gradient flow channel is formed between the groove and the first water-cooling plate, and the second gradient flow channel is formed between a side of an adjacent groove away from the first water-cooling plate and the third water-cooling plate.

[0019] Furthermore, one end of the second water-cooling plate forming the second gradient flow channel is provided with a communication port, and a cross section of the communication port is perpendicular to the axial direction of the first gradient flow channel or forms an inclined dihedral angle.

[0020] Furthermore, the first water-cooling plate is provided with a total inlet, which is connected to the first gradient flow channel; the first water-cooling plate is also provided with a total outlet, which passes through the second water-cooling plate and is connected to the second gradient flow channel, wherein the total inlet and the total outlet are arranged at one end of the first water-cooling plate.

[0021] Furthermore, the first gradient flow channel includes a plurality of third flow channels that are connected in sequence and isolated from the first flow channel, and the third flow channels are used to fill fire extinguishing materials; the first water-cooled plate is also provided with an injection port and a sealing cover, the injection port is opposite to the position of the third flow channel, and the sealing cover is covered on the injection port.

[0022] In a second aspect, the battery provided by the utility model comprises a plurality of battery modules and a thermal management assembly as described in any one of the above items;

[0023] The thermal management component is sandwiched between two adjacent battery modules.

[0024] Based on the above technical solutions, the technical effects that can be achieved by the present invention are analyzed as follows:

[0025] The thermal management component provided by the utility model includes a first water-cooling plate, a second water-cooling plate and a third water-cooling plate stacked in sequence; a first gradient flow channel is formed between one side of the second water-cooling plate and the first water-cooling plate, and a second gradient flow channel is formed between the other side and the third water-cooling plate; the first gradient flow channel is connected to the second gradient flow channel, and the flow direction of the fluid in the first gradient flow channel is opposite to the flow direction of the fluid in the second gradient flow channel.

[0026] Through the composite design structure of the first water-cooled plate, the second water-cooled plate and the third water-cooled plate, compared with the cooling structure in the prior art, the height direction space of the thermal management component is reduced under the condition that the depth of the flow channel and the thickness of the water-cooled plate remain unchanged, which reduces the space occupied by the thermal management component, and the battery module can be heat exchanged both above and below, thereby improving the heat exchange efficiency. The structure of the first gradient flow channel and the second gradient flow channel interacting in reverse, because the flow channel medium passes through the first gradient flow channel, such as under heating conditions, its temperature gradually decreases, resulting in a larger battery temperature difference between the inlet position of the first gradient flow channel and the outlet position of the first gradient flow channel. At this time, if the flow channel medium enters the second gradient flow channel and runs in parallel with the first gradient flow channel in the opposite direction, the temperature of the fluid medium presents a trend from high to low during the process from the second gradient flow channel to the outlet position of the second flow channel gradient. Since the first gradient flow channel and the second gradient flow channel are adjacently arranged and flow in opposite directions, but the temperature trend is opposite, heat transfer through the second water-cooled plate can play a role in temperature balance and meet the effect of heat balance of the water-cooled plate itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 An exploded view of a thermal management assembly provided by an embodiment of the utility model;

[0029] Figure 2 A schematic diagram of the internal structure of a thermal management component provided by an embodiment of the utility model;

[0030] Figure 3 A schematic diagram of the structure of a second water cooling plate in a thermal management assembly provided by an embodiment of the utility model at a first viewing angle;

[0031] Figure 4 A schematic diagram of the structure of a second water cooling plate in a thermal management assembly provided by an embodiment of the utility model at a second viewing angle;

[0032] Figure 5 A schematic diagram of the structure of the communication port in the thermal management component provided by the embodiment of the utility model;

[0033] Figure 6 A schematic diagram of the structure of the main inlet in the thermal management component provided in an embodiment of the utility model;

[0034] Figure 7 A schematic diagram of the structure of the main outlet of the thermal management component provided in an embodiment of the utility model;

[0035] Figure 8 A schematic diagram of the structure of a sealing cover in a thermal management assembly provided by an embodiment of the utility model;

[0036] Fig. 9 A schematic diagram of a thermal management component provided in an embodiment of the utility model;

[0037] Fig.10 A schematic diagram of the structure of a battery provided in an embodiment of the utility model.

[0038] icon:

[0039] 100-first water-cooling plate; 110-main inlet; 120-main outlet; 130-injection port; 140-blocking cover; 200-second water-cooling plate; 210-groove; 220-first gradient flow channel; 221-first flow channel; 222-connecting port; 230-second gradient flow channel; 231-second flow channel; 240-third flow channel; 300-third water-cooling plate; 400-battery module. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0044] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] Embodiment 1

[0048] The thermal management component provided by the embodiment of the utility model includes a first water-cooling plate 100, a second water-cooling plate 200 and a third water-cooling plate 300 stacked in sequence; a first gradient flow channel 220 is formed between one side of the second water-cooling plate 200 and the first water-cooling plate 100, and a second gradient flow channel 230 is formed between the other side and the third water-cooling plate 300; the first gradient flow channel 220 is connected to the second gradient flow channel 230, and the flow direction of the fluid in the first gradient flow channel 220 is opposite to the flow direction of the fluid in the second gradient flow channel 230.

[0049] Specifically, see Figures 1 to 10 The first water-cooling plate 100 , the second water-cooling plate 200 and the third water-cooling plate 300 are all plate-shaped structures and can be set to a rectangular, square, circular or any shape that meets the heat exchange requirements.

[0050] Through the composite design structure of the first water-cooling plate 100, the second water-cooling plate 200 and the third water-cooling plate 300, compared with the cooling structure in the prior art, the space occupied by the thermal management component in the height direction is reduced while the flow channel depth and the thickness of the water-cooling plate remain unchanged, thereby reducing the space occupied by the thermal management component, and the battery module 400 can be heat exchanged both from top to bottom, thereby improving the heat exchange efficiency. The first gradient flow channel 220 and the second gradient flow channel 230 have a reverse interactive structure. After the flow channel medium passes through the first gradient flow channel 220, its temperature gradually decreases under heating conditions, resulting in a larger battery temperature difference between the inlet position of the first gradient flow channel 220 and the outlet position of the first gradient flow channel 220. At this time, if the flow channel medium enters the second gradient flow channel 230 and runs in parallel with the first gradient flow channel 220 in the opposite direction, the temperature of the fluid medium shows a trend from high to low during the process from passing through the second gradient flow channel 230 to the outlet position of the second flow channel 231. Since the first gradient flow channel 220 and the second gradient flow channel 230 are adjacent to each other and the fluid flows in opposite directions, but the temperature trends are opposite, heat transfer through the second water-cooled plate 200 can play a role in temperature balance and meet the heat balance effect of the water-cooled plate itself.

[0051] The shape and structure of the thermal management components are described in detail below:

[0052] In an optional solution of the embodiment of the present utility model, the width of the first gradient flow channel 220 is smaller than the width of the second gradient flow channel 230 .

[0053] Based on the change of the coolant temperature along the flow channel direction, for example, under cooling conditions, the fluid extends on the heat exchange path, and the fluid temperature gradually increases. The coolant temperature in the first gradient flow channel 220 is lower than the coolant temperature in the second gradient flow channel 230. Therefore, the width of the first gradient flow channel 220 is set to be smaller than the width of the second gradient flow channel 230 to balance the heat exchange of the first gradient flow channel 220 and the second gradient flow channel 230 to ensure the heat exchange uniformity of the two flow channels.

[0054] In an optional scheme of an embodiment of the utility model, the first gradient flow channel 220 includes a plurality of first flow channels 221 connected in sequence, and the second gradient flow channel 230 includes a plurality of second flow channels 231; the plurality of second flow channels 231 are respectively arranged adjacent to the plurality of first flow channels 221 in a one-to-one correspondence, and the fluid flow direction in the second flow channel 231 is opposite to the fluid flow direction in the adjacent first flow channel 221.

[0055] Specifically, see Figure 3 and Figure 4 ,in, Figure 3 The solid arrow in represents the flow direction of the fluid medium in the first gradient flow channel 220. Figure 4 The dotted arrow in the figure indicates the flow direction of the fluid medium in the second gradient flow channel 230 . The multiple first flow channels 221 present a single “S” shape or multiple parallel “S” shapes. The multiple second flow channels 231 are arranged to match the shapes of the multiple first flow channels 221 .

[0056] After the fluid medium passes through the first gradient flow channel 220, its temperature gradually decreases under heating conditions, resulting in a large battery temperature difference between the inlet position of the first gradient flow channel 220 and the position of the intersection of the first gradient flow channel 220 and the second gradient flow channel 230. At this time, if the fluid medium enters the second gradient flow channel 230 and runs in the opposite direction to the first gradient flow channel 220, the temperature of the fluid medium shows a trend from high to low during the process from passing through the second gradient flow channel 230 to the outlet position of the second gradient flow channel 230. Since the second flow channel 231 of the second gradient flow channel 230 is adjacent to the first flow channel 221 of the first gradient flow channel 220 and the fluid flows in opposite directions, the temperature trends are opposite. The self-heat exchange between the first flow channel 221 and the second flow channel 231 is achieved through the second water-cooled plate 200, which plays a role in temperature balance.

[0057] As another embodiment, the first gradient flow channel 220 includes a plurality of first flow channels 221 connected in sequence, and the second gradient flow channel 230 includes two second flow channels 231 connected in parallel, and the two second flow channels 231 are respectively located on both sides of the first flow channel 221; the fluid flow direction in the second flow channel 231 is opposite to the fluid flow direction in the adjacent first flow channel 221.

[0058] See also Figure 2 and Figure 4The two second flow channels 231 are respectively located on both sides of the first flow channel 221, and heat is exchanged with the fluid medium in the first flow channel 221 at the same time, thereby improving the temperature balance effect.

[0059] In an optional solution of the embodiment of the present utility model, the width of the second flow channel 231 located outside the first flow channel 221 is greater than the width of the second flow channel 231 located inside the first flow channel 221 .

[0060] Specifically, in this embodiment, the length of the second flow channel 231 located outside the first flow channel 221 is greater than the length of the second flow channel 231 located inside the first flow channel 221. In order to reduce the flow resistance of the second flow channel 231 located outside the first flow channel 221 and reduce the pressure drop, the width of the second flow channel 231 located outside the first flow channel 221 is increased. It should be noted that for the first flow channel 221, two second flow channels 231 are arranged on both sides thereof, and the path length of the second flow channel 231 located outside connecting the two adjacent second flow channels 231 is greater than the path length of the second flow channel 231 located inside connecting the two adjacent second flow channels 231, that is, the distance between the second flow channel 231 located outside and the edge of the second water-cooled plate 200 is less than the distance between the second flow channel 231 located inside and the edge of the second water-cooled plate 200.

[0061] In an optional scheme of an embodiment of the utility model, a plurality of grooves 210 are provided at intervals on the surface of the second water-cooling plate 200 close to the first water-cooling plate 100, a first gradient flow channel 220 is formed between the groove 210 and the first water-cooling plate 100, and a second gradient flow channel 230 is formed between the side of the adjacent groove 210 away from the first water-cooling plate 100 and the third water-cooling plate 300.

[0062] Specifically, refer to Figure 5 , the groove 210 extends in the same direction and is connected to the adjacent groove 210 at one end of the groove 210, the groove 210 includes a bottom wall and two side walls, and the side walls of the adjacent grooves 210 are arranged at intervals by a platform portion, and the platform portion is brazed with the first water-cooling plate 100, so that the first gradient flow channel 220 is formed through the upper surface of the bottom wall and side walls of the groove 210 and the first water-cooling plate 100, and the lower surface of the bottom wall of the groove 210 is brazed with the third water-cooling plate 300, so that the second gradient flow channel 230 is formed through the lower surface of the opposite side walls of the adjacent grooves 210, the lower surface of the platform portion and the third water-cooling plate 300. Furthermore, the first water-cooling plate 100, the second water-cooling plate 200 and the third water-cooling plate 300 are all brazed by stamping plates, so tooling needs to be used for pre-fixing during the welding process; for example: after assembly, tooling is used to clamp at each position of the edge or pins are used to fix the non-flow channel area.

[0063] The groove 210 can be formed by stamping the second water-cooling plate 200, the first water-cooling plate 100 and one surface of the second water-cooling plate 200 are bonded to form a first gradient flow channel 220, the third water-cooling plate 300 and the other surface of the second water-cooling plate 200 are bonded to form a second gradient flow channel 230, and the outlet of the first gradient flow channel 220 and the inlet of the second gradient flow channel 230 are connected.

[0064] In the optional scheme of the embodiment of the utility model, please see Figure 4 and Figure 5 A connecting port 222 is provided at one end of the second water cooling plate 200 forming the second gradient flow channel 230, and a cross section of the connecting port 222 is perpendicular to or forms an oblique dihedral angle with the axial direction of the first gradient flow channel 220. The connecting port 222 connects the first gradient flow channel 220 and the second gradient flow channel 230, simplifies the structure, eliminates the need for an additional input port for the second gradient flow channel 230, and simplifies fluid management.

[0065] Specifically, after the groove 210 on the second water-cooling plate 200 is stamped, the bottom of the second water-cooling plate 200 is welded to the third water-cooling plate 300 to ensure the strength of the thermal management component. The cross-section of the connecting port 222 must be perpendicular to the axial direction of the first gradient flow channel 220 or present an inclined dihedral angle to ensure that the fluid medium can smoothly pass through the first gradient flow channel 220 into the second gradient flow channel 230 and reduce the pressure drop.

[0066] Compared with other methods, such as the connecting port 222 being parallel to the axis of the first gradient flow channel 220, a perforated design, or using an external pipeline for connection, the connecting port 222 is designed in this way, so that the fluid medium can flow directly from the first gradient flow channel 220 to the second gradient flow channel 230 with small flow resistance, ensuring that the fluid medium can pass through the connecting port 222 smoothly and reduce the diffusion of cold.

[0067] In an optional scheme of an embodiment of the utility model, the first water cooling plate 100 is provided with a total inlet 110, which is connected to the first gradient flow channel 220; the first water cooling plate 100 is also provided with a total outlet 120, which passes through the second water cooling plate 200 and is connected to the second gradient flow channel 230.

[0068] Specifically, the first water cooling plate 100 is configured as a single flat plate or an aluminum plate with four sides being stamped and the middle being flat. Figure 6 The water nozzle at the total inlet 110 is connected to the first water-cooling plate 100, thereby connecting the first water-cooling plate 100 and the second water-cooling plate 200 to form a first gradient flow channel 220 after welding. The total inlet 110 is set at one end of the first gradient flow channel 220, and the other end of the first gradient flow channel 220 is connected to the connecting port 222 to allow the fluid to flow into the second gradient flow channel 230; see Figure 7, after the water nozzle at the total outlet 120 passes through the first water-cooled plate 100, it passes through the second water-cooled plate 200, and connects the second gradient flow channel 230 formed by welding between the second water-cooled plate 200 and the third water-cooled plate 300. One end of the second gradient flow channel 230 is connected to the connecting port 222, and the total outlet 120 is set at the other end of the second gradient flow channel 230. Furthermore, since the temperature of the fluid medium at the total inlet 110 of the first water-cooled plate 100 is relatively large compared with the battery temperature gradient, its heat exchange capacity is relatively large, resulting in a temperature difference between the batteries in the total inlet 110 area and the total outlet 120 area. Therefore, in order to balance the temperature of the total inlet 110 and the total outlet 120 to the greatest extent, the outlet position flow channel of the second gradient flow channel 230 needs to surround the inlet position of the first gradient flow channel 220, that is, the parallel second gradient flow channels 230 converge at one end away from the connecting port 222 to form a converging flow channel, and the converging flow channel can surround the first gradient flow channel 220. In order to facilitate fluid management, the main inlet 110 and the main outlet 120 are disposed at one end of the first water cooling plate 100 so as to save overall space.

[0069] In the optional scheme of the embodiment of the utility model, please see Figure 2 The first gradient flow channel 220 includes a plurality of third flow channels 240 that are connected in sequence and isolated from the first flow channel 221, and the third flow channels 240 are used to fill the fire extinguishing material; the first water-cooled plate 100 is also provided with an injection port 130 and a blocking cover 140, the injection port 130 is opposite to the third flow channel 240, and the blocking cover 140 is covered on the injection port 130.

[0070] Specifically, see Figure 8 The injection port 130 is configured as a stepped hole, and the cross section is configured as a circle; the plugging cover 140 is correspondingly configured as a circle, and the plugging cover 140 is configured to cover the injection port 130 and is bonded to the injection port 130 by structural adhesive to seal the injection port 130. Preferably, the fire extinguishing material is configured as a liquid or semi-solid heat-conducting material or a fire extinguishing agent.

[0071] The fire extinguishing material is encapsulated in the non-channel cavity formed between the second water-cooled plate 200 and the first water-cooled plate 100 , that is, inside the third channel 240 , through the injection port 130 , so as to improve the overall heat exchange performance of the thermal management component or play a role in inhibiting thermal runaway.

[0072] In an optional solution of the embodiment of the utility model, the third water-cooling plate 300 is configured as a flat plate or a plate with a groove 210 punched on the edge of the middle plane.

[0073] The third water-cooling plate 300 is brazed with the second water-cooling plate 200, thereby improving the structural strength of the entire thermal management component; and the second gradient flow channel 230 formed between the third water-cooling plate 300 and the second water-cooling plate 200 greatly increases the heat exchange area of ​​the flowing medium, thereby improving the heat exchange efficiency of the thermal management component.

[0074] The following is a detailed description of the principles of thermal management components:

[0075] See also Fig. 9 , wherein the solid arrow indicates the flow direction of the fluid medium in the first gradient flow channel 220, and the dotted arrow indicates the flow direction of the fluid medium in the second gradient flow channel 230; under cooling conditions, the first gradient flow channel 220: the temperature of each first flow channel 221 from bottom to top: T1<T2<T3<T4; the second gradient flow channel 230: the temperature of each second flow channel 231 from bottom to top: t1>t2>t3>t4; T1 corresponds to t1, T2 corresponds to t2, T3 corresponds to t3, T4 corresponds to t4, the largest corresponds to the smallest, and the second largest corresponds to the second smallest, so that the temperature of each flow channel is balanced as a whole to avoid large differences in inlet and outlet temperatures.

[0076] Embodiment 2

[0077] The battery provided in the embodiment of the utility model includes the thermal management component described in the first embodiment, and therefore also has all the beneficial effects in the first embodiment, which will not be described in detail here.

[0078] In an optional solution of the embodiment of the utility model, the battery further includes a plurality of battery modules 400 , and the thermal management component is sandwiched between two adjacent battery modules 400 .

[0079] Specifically, refer to Fig.10 The first water-cooling plate 100 of the thermal management component abuts against the battery module 400 located above the thermal management component, and the third water-cooling plate 300 abuts against the battery module 400 located below the thermal management component, thereby achieving the effect of simultaneously exchanging heat for two adjacent battery modules 400.

[0080] In the optional scheme of the embodiment of the utility model, please see Fig.10 The battery also includes a box cover, a sealing ring, a heat-conducting material, an inlet pipe, an outlet pipe and a lower box body; the box cover is arranged at the opening of the lower box body, the sealing ring is clamped between the box cover and the lower box body, the thermal management component is located in the lower box body, and battery modules 400 are installed on both the upper and lower sides; the inlet pipe is connected to the total inlet 110, and the outlet pipe is connected to the total outlet 120; the heat-conducting material is clamped between the thermal management component and the battery module 400.

[0081] The upper and lower battery modules 400 share a thermal management component, saving height in the Z direction; at the same time, heat is exchanged between the two battery modules 400 to achieve temperature uniformity and improve heat exchange efficiency; wherein, thermal conductive material is filled between the battery module 400 and the thermal management component, and the upper battery module 400 and the lower battery module 400 are arranged symmetrically, that is, the lower battery module 400 is inverted above the crossbeam at the bottom of the lower box body and bonded with structural adhesive.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A thermal management component, It is characterized in that include: A first water-cooling plate (100), a second water-cooling plate (200), and a third water-cooling plate (300) stacked in sequence; A first gradient flow channel (220) is formed between one side of the second water-cooling plate (200) and the first water-cooling plate (100), and a second gradient flow channel (230) is formed between the other side of the second water-cooling plate (200) and the third water-cooling plate (300); The first gradient flow channel (220) is connected to the second gradient flow channel (230), and the flow direction of the fluid in the first gradient flow channel (220) is opposite to the flow direction of the fluid in the second gradient flow channel (230).

2. The thermal management assembly according to claim 1, It is characterized in that The width of the first gradient flow channel (220) is smaller than the width of the second gradient flow channel (230).

3. The thermal management assembly according to claim 2, It is characterized in that The first gradient flow channel (220) includes a plurality of first flow channels (221) connected in sequence, and the second gradient flow channel (230) includes a plurality of second flow channels (231); The plurality of second flow channels (231) are respectively arranged adjacent to the plurality of first flow channels (221) in a one-to-one correspondence, and the flow direction of the fluid in the second flow channel (231) is opposite to the flow direction of the fluid in the adjacent first flow channel (221).

4. The thermal management assembly according to claim 2, It is characterized in that The first gradient flow channel (220) comprises a plurality of first flow channels (221) connected in sequence, and the second gradient flow channel (230) comprises two second flow channels (231) connected in parallel, and the two second flow channels (231) are respectively located on both sides of the first flow channel (221); The flow direction of the fluid in the second flow channel (231) is opposite to the flow direction of the fluid in the adjacent first flow channel (221).

5. The thermal management assembly according to claim 4, It is characterized in that The width of the second flow channel (231) located outside the first flow channel (221) is greater than the width of the second flow channel (231) located inside the first flow channel (221).

6. The thermal management assembly according to claim 1, It is characterized in that A plurality of grooves (210) are provided at intervals on the surface of the second water-cooling plate (200) close to the first water-cooling plate (100); the first gradient flow channel (220) is formed between the groove (210) and the first water-cooling plate (100); and the second gradient flow channel (230) is formed between a side of the adjacent groove (210) away from the first water-cooling plate (100) and the third water-cooling plate (300).

7. The thermal management assembly according to claim 6, It is characterized in that One end of the second water-cooling plate (200) forming the second gradient flow channel (230) is provided with a connecting port (222), and a cross section of the connecting port (222) is perpendicular to the axial direction of the first gradient flow channel (220) or forms an inclined dihedral angle.

8. The thermal management assembly according to claim 7, It is characterized in that The first water-cooling plate (100) is provided with a total inlet (110), and the total inlet (110) is connected to the first gradient flow channel (220); the first water-cooling plate (100) is also provided with a total outlet (120), and the total outlet (120) passes through the second water-cooling plate (200) and is connected to the second gradient flow channel (230), wherein the total inlet (110) and the total outlet (120) are arranged at one end of the first water-cooling plate (100).

9. The thermal management assembly according to claim 3 or 4, It is characterized in that The first gradient flow channel (220) comprises a plurality of third flow channels (240) which are connected in sequence and isolated from the first flow channel (221), and the third flow channels (240) are used to fill fire extinguishing materials; the first water-cooling plate (100) is also provided with an injection port (130) and a blocking cover (140), the injection port (130) is opposite to the position of the third flow channel (240), and the blocking cover (140) is covered on the injection port (130).

10. A battery, It is characterized in that Comprising a plurality of battery modules (400) and a thermal management assembly as claimed in any one of claims 1 to 9; The thermal management component is sandwiched between two adjacent battery modules (400).

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