Liquid cooling device, battery box and electric vehicle

Abstract

The utility model relates to the field of battery cooling, in particular to a liquid cooling device, a battery box and an electric automobile, which comprises a heat exchange plate, the two ends of the heat exchange plate are fixedly connected with runner plates, and the runner plates at the two ends of the heat exchange plate are respectively a liquid inlet runner plate and a liquid outlet runner plate; n heat exchange flow channel units are arranged in the heat exchange plate, and N is larger than or equal to 2. A liquid inlet runner is arranged in the liquid inlet runner plate; a liquid outlet runner is arranged in the liquid outlet runner plate; one ends of the N heat exchange flow channel units communicate with the liquid inlet flow channel, and the other ends of the N heat exchange flow channel units communicate with the liquid outlet flow channel; the heat exchange flow channel unit comprises M heat exchange flow channel sets, M is an odd number larger than 1, and every two adjacent heat exchange flow channel sets communicate with each other. The heat exchange flow channel set comprises L heat exchange flow channels arranged in sequence, and L is a positive integer. According to the scheme, the technical problem that an existing liquid cooling device is poor in cooling and heat exchange effect is solved, and the heat exchange and cooling effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of battery cooling, in particular to a liquid cooling device, a battery box and an electric vehicle. Background Art

[0002] Power electronic equipment will generate a lot of heat during use, and in order to keep the equipment running normally, it is necessary to dissipate heat from the equipment. Taking electric vehicles as an example, in order to control the temperature of the battery pack in the battery box, a liquid cooling device is usually installed in the battery box for cooling and heat dissipation. The existing liquid cooling device is mainly based on a heat exchange plate, and a heat exchange channel is usually set in the heat exchange plate. When heat exchange is required, the temperature of the battery box can be controlled by driving the heat exchange medium through the heat exchange channel to achieve the purpose of liquid cooling.

[0003] Therefore, the cooling effect of the liquid cooling device is related to the length of the path of the liquid flowing in the heat exchange channel. If the path of the liquid flowing in the heat exchange channel is shorter, the liquid heat absorption efficiency is lower, resulting in the liquid leaving the heat exchange plate before absorbing a large amount of heat when flowing through the heat exchange plate, and the liquid heat absorption efficiency is not high; if the path of the liquid flowing in the heat exchange plate is longer, the temperature of the liquid gradually increases with the flow of the liquid, so that the heat exchange effect of the part of the heat exchange plate where the liquid with lower temperature passes is better than the heat exchange effect of the part of the heat exchange plate where the liquid with higher temperature passes, resulting in poor heat exchange uniformity of the entire heat exchange plate, which greatly affects the cooling and heat exchange effect. Utility Model Content

[0004] The utility model aims to provide a liquid cooling device, a battery box and an electric car, so as to solve the technical problem that the cooling and heat exchange effect of the current liquid cooling device is not good.

[0005] To achieve the above object, the utility model adopts the following technical solution: a liquid cooling device, including a heat exchange plate, both ends of the heat exchange plate are fixedly connected with a flow channel plate, and the flow channel plates at both ends of the heat exchange plate are respectively an inlet flow channel plate and an outlet flow channel plate;

[0006] The heat exchange plate is provided with N heat exchange channel units, N ≥ 2, and the multiple heat exchange channel units are arranged in sequence; the inlet channel plate is provided with a liquid inlet channel; the outlet channel plate is provided with a liquid outlet channel; one end of the N heat exchange channel units is connected to the liquid inlet channel, and the other end of the N heat exchange channel units is connected to the liquid outlet channel;

[0007] The heat exchange channel unit includes M heat exchange channel groups, where M is an odd number greater than 1, and the plurality of heat exchange channel groups are arranged in sequence, and two adjacent heat exchange channel groups are connected;

[0008] The heat exchange channel group includes L heat exchange channels arranged in sequence, where L is a positive integer.

[0009] The principle and advantage of this scheme are as follows: the heat exchange channel in this scheme is a channel for the flow of heat exchange medium. L heat exchange channels constitute a heat exchange channel group, M heat exchange channel groups constitute a heat exchange channel unit, and N heat exchange channel units are arranged on each heat exchange plate. In this way, the heat exchange medium enters the liquid inlet channel of the liquid inlet channel plate. Since one end of the N heat exchange channel units are connected to the liquid inlet channel, the liquid in the liquid inlet channel enters different heat exchange channel units respectively, and the liquid flows in the multiple heat exchange channel groups of the heat exchange channel unit in turn. Finally, the liquid is collected from the other ends of the multiple heat exchange channel units into the liquid outlet channel of the liquid outlet channel plate, thereby completing the liquid flow cycle and realizing heat exchange cooling.

[0010] In the present solution, during the flow of liquid in the liquid cooling device, for the entire heat exchange plate, since the plurality of heat exchange channel units are located between the liquid inlet channel plate and the liquid outlet channel plate, the liquid in the liquid inlet channel of the liquid inlet channel plate can enter different heat exchange channel units respectively, thereby being able to flow in different heat exchange channel units at the same time. There is almost no order in the flow of liquid in different heat exchange channel units, and the liquid in the heat exchange channel units at different parts of the heat exchange plate flows at the same time, thereby avoiding the problem of a long liquid flow path caused by the liquid passing through all parts of the heat exchange plate at one time, and further avoiding the problem of a low temperature in the first section of the liquid flow and a gradually increasing temperature in the latter section caused by the long liquid flow path. In this way, the temperature of the liquid in different heat exchange channel units is not much different, thereby ensuring the uniformity of heat exchange of the entire heat exchange plate and improving the heat exchange effect.

[0011] For a single heat exchange flow channel unit, during the flow of liquid in the single heat exchange flow channel unit, since the heat exchange flow channel unit is composed of multiple heat exchange flow channel groups connected to each other, the liquid will flow in different heat exchange flow channel groups. Compared with only setting up one heat exchange flow channel group, the flow path of the liquid in the heat exchange flow channel unit is extended, and the problem of the liquid flowing out due to the flow path being too short in a single heat exchange flow channel unit is avoided. This can ensure that the liquid fully absorbs heat, and avoids the problem of the liquid flowing out before fully absorbing heat after entering the heat exchange flow channel unit, thereby improving the heat absorption utilization rate of the liquid, thereby ensuring the heat exchange effect.

[0012] The liquid cooling device in this scheme is divided into a heat exchange plate, a liquid inlet channel plate and a liquid outlet channel plate. The heat exchange plate, the liquid inlet channel plate and the liquid outlet channel plate are processed and manufactured separately during the processing and manufacturing. The heat exchange plate, the liquid inlet channel plate and the liquid outlet channel plate can be fixedly connected later, instead of the entire liquid cooling device being processed and formed in one piece. In this way, the liquid cooling device is simple to process and the processing cost is relatively low.

[0013] Preferably, as an improvement, the connecting portion of two adjacent heat exchange channel groups is located at the end of the heat exchange channel group; the two adjacent connecting portions are respectively close to the liquid inlet channel plate and the liquid outlet channel plate.

[0014] With this arrangement, when the liquid flows in two adjacent heat exchange channel groups in the heat exchange channel unit, the liquid will first pass through one heat exchange channel group, and the liquid will flow from one end of the heat exchange channel group to the other end, and then flow from the end of the heat exchange channel group to the other heat exchange channel group, and flow from one end of the other heat exchange channel group to the other end, thus ensuring sufficient flow of the liquid in the heat exchange channel group and ensuring the heat exchange effect.

[0015] Preferably, as an improvement, the heat exchange plate comprises a plurality of base plates which are fixedly connected in sequence.

[0016] Thus, the heat exchange plate is formed by fixing several base plates in sequence. When the overall size of the heat exchange plate is large, the large heat exchange plate can be divided into several smaller base plates for processing, thereby greatly reducing the processing difficulty and effectively saving processing costs.

[0017] Preferably, as an improvement, a slot is provided at the end of the heat exchange plate, and the liquid inlet flow channel plate and the liquid outlet flow channel plate are both fixedly inserted in the slot.

[0018] Thus, by inserting the inlet flow channel plate and the outlet flow channel plate into the slot, the inlet flow channel plate and the outlet flow channel plate are in contact with the inner wall of the slot, thus increasing the contact area between the inlet flow channel plate (or the outlet flow channel plate) and the heat exchange plate, making the connection between the inlet flow channel plate and the outlet flow channel plate at the end of the heat exchange plate more stable and firm. At the same time, the inner side wall of the slot wraps the connection part of the inlet flow channel plate or the outlet flow channel plate, which is also conducive to improving the sealing of the connection part between the inlet flow channel plate (or the outlet flow channel plate) and the heat exchange plate, and preventing liquid from leaking from the connection part between the inlet flow channel plate (or the outlet flow channel plate) and the heat exchange plate.

[0019] Preferably, as an improvement, an outlet connected to the inlet channel is provided on the liquid inlet channel plate, and an inlet connected to the liquid outlet channel is provided on the liquid outlet channel plate, and the outlet and the inlet are respectively connected to two ends of the heat exchange channel unit.

[0020] Thus, the liquid in the liquid inlet channel on the liquid inlet channel plate flows out from the outlet into the heat exchange channel of the heat exchange channel group, and then flows out from the heat exchange channel of the heat exchange channel group into the inlet, thereby entering the liquid outlet channel.

[0021] Preferably, as an improvement, the side wall end shared by two adjacent heat exchange channel groups abuts against the channel plate to achieve closure of the ends of the two adjacent heat exchange channel groups; there is a gap between the side wall ends of the heat exchange channels of two adjacent heat exchange channel groups and the channel plate to achieve connection of the ends of the two adjacent heat exchange channel groups.

[0022] Therefore, after the flow channel plate is fixedly installed on the heat exchange plate, if the flow channel plate butts against the end of the side wall shared by the two adjacent heat exchange flow channel groups, the ends of the two adjacent heat exchange flow channel groups are closed and no liquid flows, and there is no need to separately set up a plugging piece to block the ends of the two adjacent heat exchange flow channel groups, and the liquid will not enter the other heat exchange flow channel group from the part where the heat exchange flow channel side wall butts against the flow channel plate. If there is a gap between the flow channel plate and the ends of the heat exchange flow channel side walls of the two adjacent heat exchange flow channel groups, the ends of the two adjacent heat exchange flow channel groups can be in a connected state through the gap, and the liquid can flow from one heat exchange flow channel group to another heat exchange flow channel group at the gap, so that after the flow channel plate is installed on the heat exchange plate, there is no need to separately open a hole to connect the ends of the two adjacent heat exchange flow channel groups.

[0023] Preferably, as an improvement, starting from the liquid inlet end of the liquid inlet channel, the diameter of the outlet gradually increases.

[0024] In order to further control the uniformity of heat exchange, the outlet liquid pressure at the liquid inlet end close to the liquid inlet channel is relatively large, and the size can be set smaller. However, the outlet opening can be set larger at the part of the liquid inlet end far away from the liquid inlet channel due to the reduced liquid pressure, thereby improving the uniformity of heat dissipation.

[0025] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: the battery box includes a box body, the box body includes a frame and any of the above-mentioned liquid cooling devices, and the liquid cooling device is fixed at the bottom of the frame.

[0026] In this solution, the battery box adopts the liquid cooling device for heat exchange, which can effectively ensure the heat exchange efficiency and effect of the battery; at the same time, in this solution, the heat exchange plate is directly used as the bottom plate of the battery box without setting an additional load-bearing plate as the bottom plate in the battery box, that is, the heat exchange plate is directly integrated into the frame of the battery box, so that the overall structure of the battery box is simpler and lighter. The battery box directly uses the heat exchange plate to bear the weight of the battery and directly contact the heat dissipation, and the heat dissipation effect is also better.

[0027] Preferably, as an improvement, a plurality of partition plates are fixedly connected in the box body, and the partition plates divide the internal space of the box body into multiple parts.

[0028] Thus, the partition plate divides the internal space of the box into a plurality of small spaces, and the partition plate can play a role in providing lateral support for the battery, thereby effectively fixing the battery.

[0029] To achieve the above object, the utility model adopts the following technical solution: an electric vehicle is provided with any of the above liquid cooling devices; or,

[0030] A battery box as described above is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a three-dimensional diagram of the battery box in Example 1.

[0032] Figure 2 for Figure 1 Top view of the .

[0033] Figure 3 for Figure 2 Sectional view of AA.

[0034] Figure 4 for Figure 1 A top view of the liquid cooling device.

[0035] Figure 5 for Figure 1 Exploded three-dimensional diagram (without liquid inlet channel plate).

[0036] Figure 6 for Figure 5 Enlarged view of B.

[0037] Figure 7 for Figure 5 Enlarged view of C in the middle.

[0038] Figure 8 It is a three-dimensional diagram of the liquid outlet channel plate.

[0039] Fig. 9 This is a three-dimensional diagram of the battery box in Example 2. DETAILED DESCRIPTION

[0040] The following is further described in detail through specific implementation methods:

[0041] The figure marks in the drawings of the specification include: heat exchange plate 1, liquid inlet nozzle 2, liquid outlet nozzle 3, second frame 4, first frame 5, liquid outlet channel plate 7, inlet 8, side wall 9, slot 10, heat exchange channel unit 12, liquid inlet channel 13, liquid inlet channel 14, liquid outlet channel 15, heat exchange channel 16, partition block 17, lower plate 18, upper plate 19, second partition plate 20, first partition plate 21.

[0042] Example 1

[0043] Basically as attached Figure 1-Figure 8shown.

[0044] Combination Figure 1 As shown, this embodiment discloses a battery box, including a box body, the box body includes a frame and a liquid cooling device, the frame includes two first frames 5 and two second frames 4, the two first frames 5 are opposite to each other, the two second frames 4 are opposite to each other, the ends of the first frames 5 and the ends of the second frames 4 are fixedly connected, the shape of the frame in this embodiment is a square, the first frame 5 and the second frame 4 are fixedly connected by welding, of course, in other embodiments, other common fixed connection methods can also be used, such as bolt fixing, clamping fixing, etc. The liquid cooling device is fixed at the bottom of the frame, and the liquid cooling device and the frame are fixed by welding in this embodiment. Of course, other fixing methods can also be used in other embodiments, such as clamping, bolt fixing, etc.

[0045] The battery box or liquid cooling device in this embodiment can be used in electric vehicles to cool and exchange heat for the batteries on the vehicle. Of course, in other implementations, it can also be applied to other mechanical equipment to perform cooling and heat exchange.

[0046] Combination Figure 1 , Figure 2 as well as Figure 4 As shown, this embodiment discloses a liquid cooling device, including a heat exchange plate 1, both ends of the heat exchange plate 1 are fixedly connected with a flow channel plate, the flow channel plates at both ends of the heat exchange plate 1 are respectively an inlet flow channel plate and an outlet flow channel plate 7, and the inlet flow channel plate and the outlet flow channel plate 7 are opposite to each other. The specific method of fixing the inlet flow channel plate and the outlet flow channel plate 7 at both ends of the heat exchange plate 1 is: combining Figure 6 As shown, transverse slots 10 are provided at both ends of the heat exchange plate 1, and the liquid inlet channel plate and the liquid outlet channel plate 7 are respectively inserted into the slots 10 at both ends of the heat exchange plate 1, and then the liquid inlet channel plate and the liquid outlet channel plate 7 are fixed in the slots 10 by stir friction welding, thereby achieving the liquid inlet channel plate and the liquid outlet channel plate 7 being fixed at the ends of the heat exchange plate 1.

[0047] The heat exchange plate 1 is provided with N heat exchange flow channel units 12, N ≥ 2, combined with Figure 4 As shown in the figure, the area enclosed by the dotted line is a heat exchange flow channel unit 12. In this embodiment, the number of heat exchange flow channel units 12 is five in total, and the five heat exchange flow channel units 12 are arranged in sequence from left to right; of course, in other embodiments, the number of heat exchange flow channel units 12 can be 2, 3, 4, etc. The number of heat exchange flow channel units 12 is related to the length of the heat exchange plate 1. The larger the lateral length of the heat exchange plate 1, the more heat exchange flow channel units 12 can be set.

[0048] The heat exchange channel unit 12 includes M heat exchange channel groups arranged in sequence, M is an odd number greater than 1, and the heat exchange channel group includes L heat exchange channels 16 arranged in sequence, and L is a positive integer. The heat exchange channel group is composed of heat exchange channels 16, and several heat exchange channels 16 close to each other and with the same liquid flow direction form a heat exchange channel group. Specifically in this embodiment, combined with Figure 4 As shown in the heat exchange channel unit 12 in the middle dashed box, there are a total of six heat exchange channels 16 in the heat exchange channel unit 12. The flow direction of the liquid in the two adjacent heat exchange channels 16 on the left is from the inlet channel plate to the outlet channel plate 7, so the two heat exchange channels 16 form a heat exchange channel group. The flow direction of the liquid in the two adjacent heat exchange channels 16 in the middle is from the outlet channel plate 7 to the inlet channel plate, so the two heat exchange channels 16 form a heat exchange channel group. The flow direction of the liquid in the two adjacent heat exchange channels 16 on the far right is from the inlet channel plate to the outlet channel plate 7, so the two heat exchange channels 16 form a heat exchange channel group. Therefore, in the figure, each heat exchange channel group includes two heat exchange channels 16, and the number of heat exchange channel groups in each heat exchange channel unit 12 is three. Of course, in other embodiments, the number of heat exchange channels 16 in each heat exchange channel group may be 1, 3, etc., and the number of heat exchange channel groups in each heat exchange channel unit 12 may be 5 or 7. The reason why the number of heat exchange channel groups in each heat exchange channel unit 12 is specified to be an odd number is to ensure that after the liquid enters from the leftmost heat exchange channel group in the heat exchange channel unit 12 near the end of the liquid inlet channel plate, it flows through multiple heat exchange channel groups and finally flows out from the end of the rightmost heat exchange channel group. The liquid outlet end of the rightmost heat exchange channel group is located at the liquid outlet channel plate 7, rather than at the liquid inlet channel plate, thereby ensuring that the liquid flows back to the liquid outlet channel plate 7.

[0049] Combination Figure 6 As shown, in this embodiment, the heat exchange plate 1 is extruded and integrally formed, and the heat exchange plate 1 includes an upper plate 19, a lower plate 18, and a side wall 9 of a heat exchange channel 16 located between the upper plate 19 and the lower plate 18. There is a flow space between the side walls 9 of two adjacent heat exchange channels 16 to form the heat exchange channel 16. The heat exchange plate 1 can be a whole piece. Of course, since the heat exchange plate 1 is relatively large, in order to facilitate processing, it is combined with Figure 1As shown, the heat exchange plate 1 in this embodiment is formed by welding a plurality of substrates of smaller lengths. Thus, during processing, the substrate of smaller volume is first extruded and formed, and then the plurality of substrates are transversely welded together to form the entire heat exchange plate 1. The lengths of the plurality of substrates on the heat exchange plate 1 may be inconsistent, and in this case, each heat exchange channel unit 12 may be composed of all or part of the heat exchange channels 16 on one, two or three substrates, that is, a single heat exchange channel unit 12 may not have a one-to-one correspondence with a single substrate.

[0050] In this embodiment, two adjacent heat exchange flow channel groups are connected at the ends; the specific connection method is: Figure 4 As shown in the dotted box, there is a gap between the end of the three side walls 9 (the four heat exchange channels 16 have five side walls 9, and these three side walls 9 are the three middle side walls) close to the outlet channel plate 7 in the two adjacent heat exchange channel groups on the left (the four heat exchange channels 16 on the left), and the outlet channel plate 7, so that the liquid in the leftmost heat exchange channel group can flow from the gap to the middle heat exchange channel group after entering. Similarly, there is a gap between the end of the three side walls 9 (the four heat exchange channels 16 have five side walls 9, and these three side walls 9 are also the three middle side walls among the five side walls) close to the inlet channel 14 in the two adjacent heat exchange channel groups on the right (the four heat exchange channels 16), so that the liquid flowing in the middle heat exchange channel group can flow from the gap to the rightmost heat exchange channel group. Figure 4 The end of the side wall 9 shared by the two left heat exchange flow channel groups in the middle dotted frame (that is, the right side wall 9 of the second heat exchange flow channel 16 from left to right) abuts against the inlet flow channel plate, thereby achieving the closure of the ends of the two left heat exchange flow channel groups near the inlet flow channel plate without liquid circulation, and the end of the side wall 9 shared by the two right heat exchange flow channel groups (that is, the left side wall 9 of the second heat exchange flow channel 16 from right to left) abuts against the outlet flow channel plate 7, thereby achieving the closure of the ends of the two right heat exchange flow channel groups near the outlet flow channel plate 7 without liquid circulation. In this embodiment, after the flow channel plate is installed in the slot 10, whether the ends of the side wall 9 of the heat exchange flow channel 16 abut against the flow channel plate is used to control whether the ends of the adjacent heat exchange flow channels 16 are connected, without the need to open a separate hole or set a plugging piece, and the structure is simple and convenient.

[0051] Combination Figure 4 and Figure 8 As shown, in this embodiment, a liquid inlet channel 14 is provided inside the liquid inlet channel plate; a liquid outlet channel 15 is provided inside the liquid outlet channel plate 7; Figure 7As shown, a plurality of inlets 8 communicating with the liquid outlet channel 15 are provided at the end of the liquid outlet channel plate 7, and a plurality of outlets communicating with the liquid inlet channel 14 are provided at the end of the liquid inlet channel plate. In this embodiment, the number of inlets 8 and outlets are both five, that is, the number of inlets 8 and outlets are the same as N. In this way, after the liquid inlet channel plate and the liquid outlet channel plate 7 are installed on the heat exchange plate 1, the outlet on the liquid inlet channel plate and the end of the leftmost heat exchange channel group on the heat exchange channel unit 12 are opposite to and communicated with each other, and the inlet 8 on the liquid outlet channel plate 7 and the end of the rightmost heat exchange channel group on the heat exchange channel unit 12 are opposite to and communicated with each other.

[0052] Combination Figure 3 and Figure 4 As shown, a liquid inlet nozzle 2 and a liquid outlet nozzle 3 are also welded to the first frame 5, a channel is provided at the left end of the heat exchange plate 1, a partition block 17 is welded in the channel, and the partition block 17 divides the channel into a liquid inlet channel 13 and a liquid return channel, the liquid inlet channel 13 is connected to the liquid inlet nozzle 2, and the end of the liquid inlet channel 13 is connected to the liquid inlet channel 14; the liquid return channel is connected to the liquid outlet nozzle 3, and the end of the liquid return channel is connected to the liquid outlet channel 15.

[0053] The specific implementation process is as follows: when using the battery box in this embodiment, the battery is placed in the frame, and the heat exchange plate 1 supports the battery. The heat exchange medium enters the liquid inlet channel 13 through the liquid inlet nozzle 2, and the liquid enters the liquid inlet channel 14 of the liquid inlet channel plate along the liquid inlet channel 13. Since the ends of the two heat exchange channels 16 on the leftmost side of the five heat exchange channel units 12 are connected to the outlets on the liquid inlet channel plate, the liquid in the liquid inlet channel plate enters the five heat exchange channel units 12 through multiple outlets. The liquid entering the heat exchange channel unit 12 first flows along the two leftmost heat exchange channels 16 toward the liquid outlet channel plate 7, and after flowing to the end of the heat exchange channel 16, flows to the right and enters the two middle heat exchange channels 16, and flows along the two middle heat exchange channels 16 toward the liquid inlet channel plate, and after reaching the end of the heat exchange channel 16, flows to the right and enters the two heat exchange channels 16 on the right, and flows along the two right heat exchange channels 16 toward the liquid outlet channel plate 7, and finally enters the inlet 8 of the liquid outlet channel plate 7.

[0054] In this way, the liquid in all the heat exchange flow channel units 12 is collected into the liquid outlet flow channel 15 of the liquid outlet flow channel plate 7 through different inlets 8, flows leftward along the liquid outlet flow channel 15 into the liquid return channel, and finally flows out from the liquid outlet nozzle 3, thereby completing the liquid circulation and realizing heat exchange and cooling of the battery.

[0055] Example 2

[0056] Combination Fig. 9As shown, in this embodiment, a plurality of partitions are fixedly connected in the box, and the partitions include a first partition 21 and a plurality of second partitions 20. The first partition 21 is welded in the frame left and right, and the plurality of second partitions 20 are arranged in parallel and welded in the frame front and back. A plate groove is provided in the middle of the second partition 20, and the first partition 21 is vertically inserted in the plate groove. In this embodiment, the partition divides the internal space of the box into multiple spaces, and batteries, such as blade batteries, are placed in multiple small spaces, so that the batteries are placed in the battery box more stably.

[0057] In addition, the structure and arrangement of the liquid inlet nozzle 2 and the liquid outlet nozzle 3 in this embodiment are also different from those in Example 1. In Example 1, the liquid inlet nozzle 2 and the liquid outlet nozzle 3 are both placed horizontally, while in this embodiment, the liquid inlet nozzle 2 and the liquid outlet nozzle 3 are arranged vertically, but their functions are the same, both of which realize the corresponding liquid discharge and liquid inlet functions.

[0058] Example 3

[0059] In this embodiment, starting from the liquid inlet end of the liquid inlet channel 14, the caliber of the outlet gradually increases from left to right. Similarly, starting from the liquid outlet end of the liquid outlet channel 15, the caliber of the inlet 8 gradually increases from left to right. At the same time, the size of the heat exchange channel 16 connected to the corresponding outlet is also adaptively changed. In this way, the outlet liquid pressure close to the liquid inlet end of the liquid inlet channel 14 is relatively large, and the size can be set smaller, while the part away from the liquid inlet end of the liquid inlet channel 14 is far away from the liquid inlet nozzle 2, the liquid pressure is reduced, and the opening of the outlet can be set larger, thereby improving the uniformity of heat dissipation.

[0060] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A liquid cooling device, comprising a heat exchange plate, characterized in that: Both ends of the heat exchange plate are fixedly connected with flow channel plates, and the flow channel plates at both ends of the heat exchange plate are respectively an inlet flow channel plate and an outlet flow channel plate; The heat exchange plate is provided with N heat exchange channel units inside, wherein N≥2, and the plurality of heat exchange channel units are arranged in sequence; the inlet channel plate is provided with a liquid inlet channel inside; the outlet channel plate is provided with a liquid outlet channel inside; one end of the N heat exchange channel units is connected to the liquid inlet channel, and the other end of the N heat exchange channel units is connected to the liquid outlet channel; The heat exchange channel unit includes M heat exchange channel groups, where M is an odd number greater than 1, and the plurality of heat exchange channel groups are arranged in sequence, and two adjacent heat exchange channel groups are connected; The heat exchange channel group includes L heat exchange channels arranged in sequence, and L is a positive integer.

2. A liquid cooling device according to claim 1, characterized in that: The connecting parts of two adjacent heat exchange channel groups are located at the ends of the heat exchange channel groups; the two adjacent connecting parts are respectively close to the liquid inlet channel plate and the liquid outlet channel plate.

3. A liquid cooling device according to claim 1, characterized in that: The heat exchange plate comprises a plurality of base plates which are fixedly connected in sequence.

4. A liquid cooling device according to claim 1, characterized in that: The end of the heat exchange plate is provided with a slot, and the liquid inlet channel plate and the liquid outlet channel plate are both fixedly inserted in the slot.

5. A liquid cooling device according to claim 4, characterized in that: The liquid inlet channel plate is provided with an outlet connected to the liquid inlet channel, and the liquid outlet channel plate is provided with an inlet connected to the liquid outlet channel. The outlet and the inlet are respectively connected to two ends of the heat exchange channel unit.

6. A liquid cooling device according to claim 2, characterized in that: The side wall ends shared by two adjacent heat exchange channel groups abut against the channel plate to achieve the closure of the ends of the two adjacent heat exchange channel groups; there are gaps between the side wall ends of the heat exchange channels of the two adjacent heat exchange channel groups and the channel plate to achieve the connection of the ends of the two adjacent heat exchange channel groups.

7. A liquid cooling device according to claim 5, characterized in that: Starting from the liquid inlet end of the liquid inlet channel, the diameter of the outlet gradually increases.

8. A battery box, comprising a box body, characterized in that: The box body includes a frame and a liquid cooling device according to any one of claims 1 to 7, and the liquid cooling device is fixed at the bottom of the frame.

9. The battery box according to claim 8, characterized in that: A plurality of partition plates are fixedly connected in the box body, and the partition plates divide the internal space of the box body into a plurality of parts.

10. An electric vehicle, characterized in that: A liquid cooling device according to any one of claims 1 to 7 is provided; or A battery box as claimed in claim 8 or 9 is provided.

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