Heat exchange plate, shell and battery pack

Abstract

The utility model belongs to power battery technical field discloses a kind of heat exchange plate, shell and battery package. Heat exchange plate includes heat exchange plate ontology and flow regulating structure, and heat exchange plate ontology includes the heat exchange subboard of parallel arrangement, heat exchange subboard has the heat exchange passage of parallel arrangement, and the flow direction of refrigerant in the heat exchange passage of adjacent heat exchange subboard is opposite;Flow regulating structure in the confluence transition channel extension setting in the same end of adjacent two heat exchange subboards, one end of confluence transition channel and the outlet end of the heat exchange passage of a heat exchange subboard are communicated, and the other end and the inlet end of the heat exchange passage of another heat exchange subboard are communicated, and overflow gap is arranged between confluence transition channel and the outlet end of the heat exchange passage of a heat exchange subboard, and overflow gap is used to control the flow of refrigerant in the heat exchange passage of a heat exchange subboard. The heat exchange plate can further enhance the heat dissipation consistency of battery cell, and the setting of flow regulating structure simplifies the structure of heat exchange plate, with lower cost, easy to assemble and operate.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, specifically to a heat exchange plate, a housing, and a battery pack. Background Technology

[0002] As a crucial component of electric vehicles, the power battery accounts for over 30% of the total vehicle cost, making cost reduction an urgent priority. Among the structural components of the power battery, the lower casing accounts for over 20% of the cost. Therefore, some cost-conscious technical solutions consider integrating the lower casing with a profile and a cold plate, using the profile cavity as a flow channel. However, due to the relatively simple structure of the cavity, issues such as poor precision in flow channel regulation arise.

[0003] To address the issue of poor flow rate regulation accuracy, existing technologies offer an adjustable flow rate liquid cooling plate. This plate, through a flow rate regulating device, can control the flow rate of each cooling channel within its body, thereby reducing the temperature difference between battery cells. However, because the refrigerant in this linear cooling channel absorbs heat unidirectionally from inlet to outlet, its temperature rises steadily. The closer to the outlet, the smaller the temperature difference between the refrigerant and the battery cell, resulting in lower heat exchange efficiency. This prevents a significant improvement in the temperature difference between battery cells, leaving considerable room for improvement in battery performance and range.

[0004] Therefore, it is necessary to design a heat exchange plate, housing, and battery pack to solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide a heat exchange plate that overcomes the shortcomings of existing liquid cooling plate flow regulation methods, further reduces the temperature difference between battery cells, improves the temperature uniformity of the battery pack, enhances performance and lifespan, and has a simple structure that is easy to assemble and operate.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The heat exchange plate includes the heat exchange plate body and the flow regulation structure, wherein:

[0008] The heat exchange plate body includes at least two parallel heat exchange sub-plates, each of the heat exchange sub-plates having at least two parallel heat exchange channels, and the refrigerant flows in opposite directions in the heat exchange channels of two adjacent heat exchange sub-plates.

[0009] The flow regulation structure includes a confluence transition channel, which extends to the same end of two adjacent heat exchange subplates. One end of the confluence transition channel is connected to the outlet end of the heat exchange channel of one heat exchange subplate, and the other end of the confluence transition channel is connected to the inlet end of the heat exchange channel of the other heat exchange subplate. An overflow gap is provided between the confluence transition channel and the outlet end of the heat exchange channel of one heat exchange subplate. The overflow gap is used to control the flow rate of the refrigerant in the heat exchange channel of one heat exchange subplate.

[0010] Preferably, the heat exchange plate body has a liquid inlet and a liquid outlet; two heat exchange sub-plates are provided, one of which has its heat exchange channel inlet connected to the liquid inlet, and the other of which has its heat exchange channel outlet connected to the liquid outlet.

[0011] Preferably, the heat exchange plate body also includes a first sealing plate, which is sealed at the end opening of the heat exchange plate body.

[0012] The flow regulation structure includes a connecting part and an regulating part. Along the direction in which the heat exchange channels are arranged in parallel, one side of the connecting part is attached to the end of the heat exchange sub-plate, and the other side of the connecting part is attached to the first sealing plate. Along the direction in which the heat exchange channels are arranged in parallel, both ends of the connecting part are attached to the inner sidewall of the heat exchange plate body. The regulating part is vertically and protrudingly provided on one side of the connecting part. The regulating part has the flow notch. The space formed by the regulating part, the first sealing plate and the inner sidewall of the heat exchange plate body on the connecting part is defined as the confluence transition channel.

[0013] Preferably, the adjusting part extends between the two opposite inner sidewalls of the heat exchange plate body along the direction in which the heat exchange channels are arranged in parallel, and the adjusting part has a flow diversion notch on the part of the heat exchange channel facing the other heat exchange sub-plate, the flow diversion notch being used to control the flow rate of the refrigerant in the heat exchange channel of the other heat exchange sub-plate.

[0014] Preferably, the adjustment part includes a plurality of first baffles arranged at intervals, the space between adjacent first baffles defines the flow gap, and the length of the first baffle is set to a, the flow opening width of the heat exchange channel is b, and 0≤a<b.

[0015] Preferably, the regulating part includes a plurality of second baffles arranged at intervals, the space between adjacent second baffles defines the flow diversion gap, and the length of the second baffle is set to c, the width of the flow opening of the heat exchange channel is b, and 0≤c<b.

[0016] Preferably, the heat exchange plate further includes a foolproof component, which includes a foolproof protrusion and a foolproof groove. The foolproof protrusion is inserted into the foolproof groove. The foolproof protrusion is provided on one of the inner sidewalls of the flow regulating structure and the heat exchange plate body, and the foolproof groove is provided on the other of the inner sidewalls of the flow regulating structure and the heat exchange plate body.

[0017] Preferably, the anti-mistake protrusion includes a first anti-mistake protrusion and a second anti-mistake protrusion. The first anti-mistake protrusion and the second anti-mistake protrusion are respectively disposed at both ends of the flow regulating structure and arranged in parallel along the heat exchange channel. The first anti-mistake protrusion protrudes from the end of the flow regulating structure, and the second anti-mistake protrudes from the surface of the flow regulating structure in a vertical direction.

[0018] The anti-mistake groove includes a first anti-mistake groove and a second anti-mistake groove. The first anti-mistake groove is recessed on the inner side wall of the heat exchange plate body relative to the first anti-mistake protrusion, and the second anti-mistake groove is recessed on the inner side wall of the heat exchange plate body relative to the second anti-mistake protrusion.

[0019] Another objective of this invention is to provide a housing that, by employing the aforementioned heat exchange plate, can reduce manufacturing costs, decrease the space occupancy of the housing, and improve the housing's ability to uniformly exchange heat with the battery cells, thereby effectively enhancing the safety and lifespan of the battery cells.

[0020] To achieve this objective, the present invention adopts the following technical solution:

[0021] The housing includes a baffle plate, a cover plate, and the aforementioned heat exchange plate. The baffle plate includes multiple side plates connected end to end, and a cavity for placing the battery cell is formed within the baffle plate. The cover plate is detachably sealed to the top opening of the cavity, and the heat exchange plate is sealed to the bottom opening of the cavity.

[0022] Another objective of this invention is to provide a battery pack that can reduce production costs, decrease space occupation, have wider applicability, enhance the safety and reliability of the battery pack, and extend its service life.

[0023] To achieve this objective, the present invention adopts the following technical solution:

[0024] A battery pack includes a battery cell assembly and the aforementioned housing. The housing has a cavity in which the battery cell assembly is housed. A heat exchange plate of the housing is disposed at the bottom of the cavity and is used to support and transfer heat to the battery cell assembly.

[0025] The beneficial effects of this utility model are:

[0026] The heat exchange plate provided by this utility model, in specific use, has an overflow gap between the flow regulation structure and the heat exchange channel of an adjacent heat exchange sub-plate. This overflow gap can be large or small, thereby controlling the flow rate of the refrigerant within the heat exchange channel of the sub-plate, achieving uniform heat dissipation for the battery cells. Subsequently, the refrigerant, passing through the overflow gap, can converge in the confluence transition channel, eliminating the temperature gradient of the refrigerant flowing from different heat exchange channels. This neutralizes the temperatures of the high-temperature and low-temperature refrigerants, averaging the overall temperature and eliminating pressure differences, thus providing a unified temperature and pressure reference for the multiple heat exchange channels of another adjacent heat exchange sub-plate. Based on this, the refrigerant entering the other adjacent heat exchange sub-plate, under the same inlet conditions, naturally flows into multiple heat exchange channels, enhancing the consistency of heat dissipation for the battery cells. The uniform heat dissipation effect of the battery cells is better, further reducing the temperature difference among the multiple battery cells distributed along the length of the heat exchange channel, overcoming the defects of existing technologies using linear heat exchange channels. In addition, this flow regulation structure can integrate the functions of flow regulation and refrigerant fusion redistribution, thereby simplifying the construction of the heat exchange plate, reducing costs, and making it easier to assemble and operate.

[0027] The housing provided by this utility model is equipped with the aforementioned heat exchange plate, which eliminates the need for a bottom plate in the original housing, saves raw materials, reduces costs, reduces the space occupied by the housing, and further reduces the temperature difference between multiple battery cells, enhances the consistency of the housing's heat dissipation effect on the battery cells, and improves the uniform heat dissipation effect of the battery cells, thereby improving the temperature uniformity and safety and reliability of the housing during use.

[0028] The battery pack provided by this utility model, with the aforementioned shell, can effectively reduce the manufacturing cost of the battery pack, reduce its space occupation, and enable assembly in confined or extreme environments, thus expanding its application scenarios and making it more widely applicable. Moreover, during use, the battery pack can achieve good heat exchange effects for each cell or area in the cell assembly through the uniform heat exchange capability of the heat exchange plate, thereby ensuring that all areas of the cell assembly are within a suitable operating temperature range, significantly enhancing the safety and reliability of the battery pack and extending its service life. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the internal structure of the heat exchange plate provided by this utility model;

[0030] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0031] Figure 3 yes Figure 1A magnified view of a section at point B in the middle;

[0032] Figure 4 This is a schematic diagram of the flow regulation structure provided by this utility model;

[0033] Figure 5 This is an isometric view of the housing provided by this utility model.

[0034] In the picture:

[0035] 100. Heat exchange plate; 200. Enclosure panel;

[0036] 1. Heat exchanger plate body; 101. Liquid inlet; 102. Liquid outlet; 11. Heat exchanger sub-plate; 111. Heat exchange channel; 112. Flow guide ribs;

[0037] 2. Flow regulation structure; 201. Convergence transition channel; 202. Flow gap; 203. Flow split gap; 21. Connecting part; 22. Regulating part; 221. First baffle bar; 222. Second baffle bar;

[0038] 3. First sealing plate;

[0039] 4. Second sealing plate;

[0040] 511. First anti-mistake protrusion; 512. Second anti-mistake protrusion. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] The following is in conjunction with the appendix Figure 1 To be continued Figure 5 The present invention will be described in detail with specific embodiments of the heat exchange plate 100, housing and battery pack provided by the present invention.

[0046] refer to Figure 1 As shown, this utility model provides a heat exchange plate 100, which includes a heat exchange plate body 1 and a flow regulating structure 2. The heat exchange plate body 1 is a metal plate with an internal cavity. The heat exchange plate body 1 has a liquid inlet 101, a liquid outlet 102, and at least two parallel heat exchange sub-plates 11. Each heat exchange sub-plate 11 has at least two parallel heat exchange channels 111, and the flow direction of the refrigerant in the heat exchange channels 111 of adjacent heat exchange sub-plates 11 is opposite. Exemplarily, in this embodiment, the heat exchange plate body 1 includes two heat exchange sub-plates 11, and the two heat exchange sub-plates 11 have the same number of heat exchange channels 111, each having 10 channels. Figure 1 The 10 heat exchange channels 111 of the heat exchange subplate 11 on the left side are connected to the liquid inlet 101, located in Figure 1 The 10 heat exchange channels 111 on the right side of the heat exchange subplate 11 are connected to the liquid outlet 102.

[0047] Preferably, the inlet 101 and outlet 102 are located at the same end of the two heat exchange subplates 11, so that the flow channel profiles welded to the inlet 101 and outlet 102 are on the same side of the heat exchange plate body 1. This also ensures that the inlet nozzles and outlet nozzles welded to these two flow channel profiles are on the same side of the heat exchange plate body 1. The inlet nozzles and outlet nozzles connect the liquid storage device to the heat exchange plate body 1, allowing the refrigerant to enter the heat exchange plate body 1 from the inlet nozzle through the flow channel profiles, exchange heat with the battery cells, and then flow back to the liquid storage device through the flow channel profiles and outlet nozzles. This arrangement not only facilitates pipeline layout and simplifies assembly, but also makes it easier for personnel to inspect and maintain the inlet nozzles and outlet nozzles.

[0048] The refrigerant can play a role in cooling or heating the battery cells. For example, under extreme low-temperature conditions, when the heat exchange plate 100 is integrated into the battery pack installed in the vehicle, the refrigerant in the heat exchange plate 100 can be a water-ethylene glycol solution, a fluorinated liquid, or a salt-water solution. It has good low-temperature stability and fluidity, can effectively prevent freezing, and can stably transfer heat to the battery cells in the battery pack under low-temperature conditions, ensuring that the vehicle can operate normally at low temperatures. Under suitable external temperatures, when the heat exchange plate 100 is integrated into the battery pack installed in the vehicle, energy storage system, or other equipment, the heat exchange medium in the heat exchange plate 100 can be liquid water, cooling oil, gaseous cooling medium (nitrogen or air), liquid fluorine, or refrigerant, etc. It can effectively absorb the heat generated by the battery cells during operation, cool the battery cells, and keep the battery pack within a suitable operating temperature range.

[0049] Preferably, in this embodiment, the battery cell is a prismatic battery cell, and multiple prismatic battery cells extend along the length of the heat exchange channel 111 (refer to...). Figure 1 The square-shell battery cells are stacked (as shown in the X-axis), and both ends of the square-shell battery cells are in thermal contact with two heat exchange sub-plates 11 along the Y-axis, so that the two ends of the square-shell battery cells are connected to the two heat exchange sub-plates 11 for heat transfer. The Y-axis is horizontal and perpendicular to the X-axis.

[0050] Continue to refer to Figure 1 As shown, the flow regulation structure 2 is located at the end of the two heat exchange sub-plates 11 away from the inlet 101 and outlet 102, and includes a confluence transition channel 201. The confluence transition channel 201 extends between the two heat exchange sub-plates 11. One end of the confluence transition channel 201 is connected to the outlet end of the heat exchange channel 111 of the heat exchange sub-plate 11 located on the left, and the other end of the confluence transition channel 201 is connected to the inlet end of the heat exchange channel 111 of the heat exchange sub-plate 11 located on the right. Figure 2 As shown, a flow gap 202 is provided between the flow transition channel 201 and the outlet end of the heat exchange channel 111 of the heat exchange subplate 11 located on the left. The flow gap 202 can control the flow rate of the refrigerant in the heat exchange channel 111.

[0051] In practical use, combine Figure 1 , Figure 2 As shown, the refrigerant enters the heat exchange plate body 1 from the inlet nozzle and is diverted into the 10 heat exchange channels 111 of the heat exchange sub-plate 11 on the left. Since the flow regulation structure 2 is provided with an overflow gap 202 between it and the heat exchange channel 111, the overflow gap 202 can be large or small, thereby controlling the flow rate of the refrigerant in the heat exchange channel 111 of the heat exchange sub-plate 11, so as to achieve uniform heat dissipation of the battery cell. Subsequently, the refrigerant merges in the confluence transition channel 201 through the overflow gap 202, which can eliminate the temperature gradient of the refrigerant flowing out of different heat exchange channels 111, so that the high temperature refrigerant and the low temperature refrigerant are neutralized, the overall temperature is averaged, and the pressure difference is eliminated, thereby providing a unified temperature and pressure reference for the 10 heat exchange channels 111 of the heat exchange sub-plate 11 on the right. Based on this, the refrigerant entering the right heat exchange subplate 11, under the same inlet conditions, naturally flows into the 10 heat exchange channels 111 within the right heat exchange subplate 11, enhancing the uniformity of heat dissipation to the battery cells. This results in better uniform heat dissipation and further reduces the temperature difference between multiple battery cells distributed along the X-axis. This overcomes the shortcomings of existing technologies using linear heat exchange channels 111, further improving the battery pack's temperature uniformity, performance, and lifespan. Furthermore, this flow regulation structure 2 integrates flow regulation and refrigerant fusion and redistribution functions, simplifying the construction of the heat exchange plate 100, reducing costs, and making it easier to assemble and operate.

[0052] In other parallel embodiments, the number of heat exchange subplates 11 and heat exchange channels 111 can be adjusted and changed according to actual working conditions. The number of heat exchange channels 111 of adjacent heat exchange subplates 11 can also be the same or different. This utility model does not limit this.

[0053] Furthermore, when the number of heat exchange subplates 11 is not less than 3, the left heat exchange subplate 11 is directly connected to the liquid inlet 101, and the right heat exchange subplate 11 is directly connected to the liquid outlet 102. A flow regulation structure 2 is provided between the outlet end of the heat exchange channel 111 of the left heat exchange subplate 11 and the inlet end of the heat exchange channel 111 of the middle heat exchange subplate 11. A flow regulation structure 2 can be provided between the outlet end of the heat exchange channel 111 of the middle heat exchange subplate 11 and the outlet end of the heat exchange channel 111 of the right heat exchange subplate 11, and between the outlet end of the heat exchange channel 111 of one adjacent middle heat exchange subplate 11 and the inlet end of the heat exchange channel 111 of another middle heat exchange subplate 11. Alternatively, a flow regulation structure 2 may not be provided. This is because the refrigerant temperature in the heat exchanger sub-plate 11 directly connected to the liquid inlet 101 is lower than the overall refrigerant temperature in other heat exchanger sub-plates 11, resulting in a more significant heat exchange effect on the battery cell. Therefore, it plays a dominant role in the heat exchange process of the battery cell. After the refrigerant has undergone heat exchange through the first two heat exchanger sub-plates 11, its temperature has increased significantly, reducing its heat exchange potential. Therefore, natural flow diversion can meet the temperature uniformity requirement, and the flow regulation structure 2 can be omitted. However, if the battery cell heating is uneven or the manufacturing process of the heat exchange channel 111 deviates significantly, the flow regulation structure 2 can still be used to further regulate the flow between other heat exchanger sub-plates 11.

[0054] Specifically, in this embodiment, reference is made to... Figure 2 As shown, the heat exchange plate 100 also includes a first sealing plate 3, which is sealed at the end opening of the heat exchange plate body 1 (specifically, by welding). The flow regulation structure 2 includes a connecting part 21 and an regulating part 22. Along the X-axis, one side of the connecting part 21 is attached to the end of the heat exchange subplate 11, and the other side of the connecting part 21 is attached to the first sealing plate 3. Along the Y-axis, both ends of the connecting part 21 are attached to the inner wall of the heat exchange plate body 1, and the regulating part 22 is provided vertically and protrudingly on one side of the connecting part 21. The regulating part 22 has an overflow notch 202. The space formed by the regulating part 22, the first sealing plate 3 and the inner wall of the heat exchange plate body 1 on the connecting part 21 is defined as a confluence transition channel 201. With the above settings, the flow regulating structure 2 can be limited and installed between the first sealing plate 3 and the heat exchange channel 111, ensuring that the flow regulating structure 2 will not move easily and guaranteeing the safety and reliability of the structure. At the same time, the regulating part 22 can be tightly connected to the heat exchange channel 111, ensuring that after the refrigerant flows to the flow regulating structure 2, the refrigerant can only flow through the flow gap 202, thereby ensuring that the refrigerant flow in the heat exchange channel 111 is controlled through the flow gap 202.

[0055] In one embodiment of this invention, multiple flow guide ribs 112 are arranged parallel to each other along the Y-axis and spaced apart in each heat exchange subplate 11. The channel between two adjacent flow guide ribs 112 is defined as a heat exchange channel 111. The side of the adjustment part 22 is fitted and abutted against the end face of the flow guide rib 112, thereby eliminating the gap between the adjustment part 22 and the flow guide rib 112, so as to achieve the purpose of the refrigerant only flowing through the flow gap 202.

[0056] It should be noted that the heat exchange plate 100 provided in this application embodiment also includes a second sealing plate 4. The second sealing plate 4 and the first sealing plate 3 are respectively sealed and welded to the openings at both ends of the heat exchange plate body 1 to ensure that the refrigerant will not leak.

[0057] Specifically, refer to Figure 2 As shown, the adjustment unit 22 provided in this embodiment includes a plurality of first baffles 221 arranged at intervals. The space between adjacent first baffles 221 defines the aforementioned flow gap 202. The length of the first baffle 221 is set as 'a', and the width of the flow opening of the heat exchange channel 111 is set as 'b'. The relationship between 'a' and 'b' is: 0 ≤ a < b. Through the above settings, the flow cross-sectional area of ​​the flow gap 202 can be directly adjusted by changing the distance between adjacent first baffles 221. The design is reasonable and convenient to operate and implement.

[0058] For example, in the refrigerant flow simulation process, the cross-sectional area of ​​each flow gap 202 can first be designed to be half the cross-sectional area of ​​the corresponding heat exchange channel 111. With the flow gap 202 and heat exchange channel 111 at the same height, the cross-sectional area of ​​the flow gap 202 can be adjusted by changing the spacing between two adjacent first baffles 221. Based on the results of the first round of refrigerant simulation, the flow rate of the refrigerant in the heat exchange channel 111 corresponding to the flow gap 202 can be obtained. If the flow rate is too low, the length of the first baffle 221 is further reduced, thereby further increasing the cross-sectional area of ​​the flow gap 202; if the flow rate is too high, the length of the first baffle 221 is further increased, thereby further reducing the cross-sectional area of ​​the flow gap 202. This process is iterated until the flow distribution of each heat exchange channel 111 is within 10% deviation. Of course, in other application scenarios, the length of the first baffle 221 can be reduced to 0, so that the cross-sectional area of ​​the flow gap 202 is equal to the cross-sectional area of ​​the corresponding heat exchange channel 111, that is, the heat exchange channel 111 is in a completely open state, as long as the flow distribution deviation of the heat exchange channel 111 is kept within the required range.

[0059] Optionally, in this embodiment, reference is made to... Figure 3As shown, along the direction in which the heat exchange channels 111 are arranged in parallel, the adjustment part 22 extends between the two opposite inner sidewalls of the heat exchange plate body 1, and the part of the adjustment part 22 facing the heat exchange channel 111 of the other heat exchange sub-plate 11 has a flow diversion notch 203. Similar to the principle of the flow diversion notch 202, by changing the size of the flow cross-sectional area of ​​the flow diversion notch 203, the flow rate of the refrigerant in the heat exchange channel 111 of the other heat exchange sub-plate 11 opposite to it can be controlled.

[0060] Specifically, please refer to Figure 3 As shown, the adjustment unit 22 provided in this embodiment includes a plurality of spaced-apart second baffles 222. The space between adjacent second baffles 222 defines the aforementioned flow-dividing gap 203, and the length of the second baffle 222 is set to c, where c and b satisfy the relationship: 0 ≤ c < b. Through the above arrangement, the flow cross-sectional area of ​​the flow-dividing gap 203 can be adjusted by changing the distance between adjacent second baffles 222, thereby achieving precise control of the refrigerant flow rate within the heat exchange channel 111 of the other heat exchange subplate 11.

[0061] The design method for the cross-sectional area of ​​the flow divider 203 is similar to that of the flow divider 202. Specifically, the cross-sectional area of ​​each flow divider 203 is designed to be half the cross-sectional area of ​​the corresponding heat exchange channel 111. With the flow divider 203 and heat exchange channel 111 at the same height, the cross-sectional area of ​​the flow divider 203 is adjusted by changing the spacing between two adjacent second baffles 222. Therefore, this invention will not be elaborated further here. Of course, in other applications, the length of the second baffle 222 can be reduced to zero, so that the cross-sectional area of ​​the flow divider 203 is equal to the cross-sectional area of ​​the corresponding heat exchange channel 111, meaning the heat exchange channel 111 is completely open. This is sufficient as long as the flow distribution deviation of the heat exchange channel 111 remains within the required range.

[0062] Optionally, the heat exchange plate 100 provided in this application embodiment also includes a foolproof component. The foolproof component is used to assist the flow regulation structure 2 and the heat exchange plate body 1 in alignment, thereby preventing the flow regulation structure 2 from being installed backwards, ensuring that the flow regulation structure 2 is installed accurately, so that the regulating part 22 can be tightly attached to the end of the guide rib plate 112, ensuring that the refrigerant flows out of the heat exchange channel 111 only through the flow gap 202, or the refrigerant only through the diversion gap 203 into the corresponding heat exchange channel 111, thereby improving the flow regulation effect.

[0063] One embodiment of this application describes a foolproof component comprising a foolproof protrusion and a foolproof groove. The flow regulating structure 2 has a protruding foolproof protrusion, and the inner wall of the heat exchange plate body 1 has a recessed foolproof groove. The foolproof protrusion and the foolproof groove are interlocked. The foolproof protrusion and the foolproof groove have unique interlocking positions. Therefore, when assembling the flow regulating structure 2 onto the heat exchange plate body 1, the flow regulating structure 2 can only be assembled onto the heat exchange plate body 1 when the foolproof protrusion is inserted into the foolproof groove. At this time, the regulating part 22 and the guide rib plate 112 are at the shortest near-fitting distance. Of course, it is not limited to setting the foolproof protrusion on the flow regulating structure 2 and the foolproof groove on the inner wall of the heat exchange plate body 1. In some other alternative embodiments, the positions of the foolproof protrusion and the foolproof groove can be interchanged; that is, the flow regulating structure 2 has a recessed foolproof groove, and the inner wall of the heat exchange plate body 1 has a protruding foolproof protrusion.

[0064] For more specific details, please refer to [link / reference]. Figure 4 As shown, the anti-mistake protrusions include a first anti-mistake protrusion 511 and a second anti-mistake protrusion 512. The first anti-mistake protrusion 511 and the second anti-mistake protrusion 512 are respectively disposed at both ends of the adjusting part 22. The first anti-mistake protrusion 511 protrudes along the Y-axis direction at the end of the adjusting part 22, and the second anti-mistake protrusion 512 protrudes vertically on the surface of the connecting part 21, so that the protrusion directions of the first anti-mistake protrusion 511 and the second anti-mistake protrusion 512 are different. In addition, the anti-mistake grooves include a first anti-mistake groove and a second anti-mistake groove. The first anti-mistake groove is recessed in the inner sidewall of the heat exchange plate body 1 relative to the first anti-mistake protrusion 511, and the second anti-mistake groove is recessed in the inner sidewall of the heat exchange plate body 1 relative to the second anti-mistake protrusion 512.

[0065] With the above settings, the flow regulating structure 2 can only be fully aligned and assembled with the heat exchange plate body 1 in one correct direction during assembly. If the operator rotates the flow regulating structure 2 180°, reverses it, or flips it left and right for assembly, at least one protrusion will not be able to be inserted into the corresponding groove. This physically prevents incorrect assembly actions, avoids problems caused by reverse installation or incorrect direction, further improves assembly reliability, and greatly reduces the possibility of human error.

[0066] This application embodiment also provides a housing, which includes a baffle plate 200, a cover plate (not shown in the figure), and the heat exchange plate 100 described above. The baffle plate 200 includes multiple side plates connected end to end, and a cavity for placing battery cells is formed within the baffle plate 200. The cover plate is detachably sealed to the top opening of the cavity, and the heat exchange plate 100 is sealed to the bottom opening of the cavity. Through the above design, the heat exchange plate 100 can integrate the housing bottom plate and heat exchange function into one unit, eliminating the need for a separate bottom plate in the original housing, saving raw materials, reducing costs, reducing the space occupied by the housing, and further reducing the temperature difference between multiple battery cells, enhancing the consistency of the housing's heat dissipation effect on the battery cells, resulting in better uniform heat dissipation of the battery cells, thereby improving the temperature uniformity and operational safety and reliability of the housing during use.

[0067] This application also provides a battery pack, which includes a cell assembly and the aforementioned housing. The housing has a cavity, in which the cell assembly is housed. A heat exchange plate 100 of the housing is used to support and transfer heat to the cell assembly. The cell assembly includes multiple cells stacked along the X-axis. These cells can be prismatic, cylindrical, or blade-shaped cells, and this invention is not limited to these types. By using the aforementioned housing in the battery pack, the manufacturing cost of the battery pack can be effectively reduced, the space occupied by the battery pack can be reduced, and it can be assembled in confined or other extreme space environments, expanding the application scenarios of the battery pack and making it more widely applicable. Moreover, during use, the uniform heat exchange capability of the heat exchange plate 100 ensures that each cell or area in the cell assembly achieves good heat exchange, thereby ensuring that all areas of the cell assembly are within a suitable operating temperature range. This significantly enhances the safety and reliability of the battery pack and extends its service life.

[0068] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A heat exchange plate, characterized in that, It includes a heat exchange plate body (1) and a flow regulation structure (2), wherein: The heat exchange plate body (1) includes at least two parallel heat exchange sub-plates (11), each of the heat exchange sub-plates (11) has at least two parallel heat exchange channels (111), and the refrigerant flows in opposite directions in the heat exchange channels (111) of two adjacent heat exchange sub-plates (11). The flow regulation structure (2) includes a confluence transition channel (201), which extends to the same end of two adjacent heat exchange subplates (11). One end of the confluence transition channel (201) is connected to the outlet end of the heat exchange channel (111) of one heat exchange subplate (11), and the other end of the confluence transition channel (201) is connected to the inlet end of the heat exchange channel (111) of the other heat exchange subplate (11). An overflow gap (202) is provided between the confluence transition channel (201) and the outlet end of the heat exchange channel (111) of one heat exchange subplate (11). The overflow gap (202) is used to control the flow rate of the refrigerant in the heat exchange channel (111) of one heat exchange subplate (11).

2. The heat exchange plate according to claim 1, characterized in that, The heat exchange plate body (1) has a liquid inlet (101) and a liquid outlet (102); there are two heat exchange sub-plates (11), one of which has its inlet end of the heat exchange channel (111) connected to the liquid inlet (101), and the other has its outlet end of the heat exchange channel (111) connected to the liquid outlet (102).

3. The heat exchange plate according to claim 2, characterized in that, It also includes a first sealing plate (3), which is sealed at the end opening of the heat exchange plate body (1); The flow regulation structure (2) includes a connecting part (21) and an regulating part (22). Along the direction in which the heat exchange channels (111) are arranged in parallel, one side of the connecting part (21) is attached to the end of the heat exchange subplate (11), and the other side of the connecting part (21) is attached to the first sealing plate (3). Along the direction in which the heat exchange channels (111) are arranged in parallel, both ends of the connecting part (21) are attached to the inner wall of the heat exchange plate body (1). The regulating part (22) is vertically and protrudingly arranged on one side of the connecting part (21). The flow notch (202) is opened on the regulating part (22). The space formed by the regulating part (22), the first sealing plate (3) and the inner wall of the heat exchange plate body (1) on the connecting part (21) is defined as the confluence transition channel (201).

4. The heat exchange plate according to claim 3, characterized in that, Along the direction in which the heat exchange channels (111) are arranged in parallel, the adjustment part (22) extends between the two opposite inner sidewalls of the heat exchange plate body (1), and the portion of the adjustment part (22) facing the heat exchange channel (111) of the other heat exchange sub-plate (11) is provided with a diversion notch (203), the diversion notch (203) is used to control the flow rate of the refrigerant in the heat exchange channel (111) of the other heat exchange sub-plate (11).

5. The heat exchange plate according to claim 3, characterized in that, The regulating part (22) includes a plurality of first baffles (221) arranged at intervals. The space between adjacent first baffles (221) defines the flow gap (202). The length of the first baffle (221) is set to a, and the flow opening width of the heat exchange channel (111) is b, 0≤a<b.

6. The heat exchange plate according to claim 4, characterized in that, The regulating part (22) includes a plurality of second baffles (222) arranged at intervals. The space between adjacent second baffles (222) defines the flow diversion gap (203). The length of the second baffle (222) is set to c, and the width of the flow opening of the heat exchange channel (111) is b, 0≤c<b.

7. The heat exchange plate according to any one of claims 1-6, characterized in that, The heat exchange plate (100) also includes a foolproof component, which includes a foolproof protrusion and a foolproof groove. The foolproof protrusion is inserted into the foolproof groove. The foolproof protrusion is provided on one of the inner sidewalls of the flow regulating structure (2) and the heat exchange plate body (1), and the foolproof groove is provided in the other of the inner sidewalls of the flow regulating structure (2) and the heat exchange plate body (1).

8. The heat exchange plate according to claim 7, characterized in that, The anti-mistake protrusion includes a first anti-mistake protrusion (511) and a second anti-mistake protrusion (512). The first anti-mistake protrusion (511) and the second anti-mistake protrusion (512) are respectively disposed at both ends of the flow regulating structure (2) and arranged in parallel along the heat exchange channel (111). The first anti-mistake protrusion (511) protrudes from the end of the flow regulating structure (2), and the second anti-mistake protrusion (512) protrudes vertically from the surface of the flow regulating structure (2). The anti-mistake groove includes a first anti-mistake groove and a second anti-mistake groove. The first anti-mistake groove is recessed on the inner side wall of the heat exchange plate body (1) relative to the first anti-mistake protrusion (511), and the second anti-mistake groove is recessed on the inner side wall of the heat exchange plate body (1) relative to the second anti-mistake protrusion (512).

9. A housing, characterized in that, The device includes a baffle plate (200), a cover plate, and a heat exchange plate (100) according to any one of claims 1-8. The baffle plate (200) includes a plurality of side plates connected end to end and forms a cavity for placing the battery cell within the baffle plate (200). The cover plate is detachably disposed over the top opening of the cavity, and the heat exchange plate (100) is disposed over the bottom opening of the cavity.

10. A battery pack, characterized in that, The device includes a battery cell assembly and a housing as described in claim 9, the housing having a cavity in which the battery cell assembly is housed, and a heat exchange plate (100) of the housing being disposed at the bottom of the cavity, the heat exchange plate (100) being used to support and transfer heat to the battery cell assembly.

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