Liquid cooling plate and battery pack

Abstract

The utility model provides a liquid cooling plate and a battery pack. The liquid cooling plate comprises a liquid cooling plate main body with a cooling liquid flow channel, a first spraying part and a second spraying part are arranged on one side, facing the battery module, of the liquid cooling plate main body, the first spraying part is arranged towards a single battery cell in the battery module, the second spraying part is arranged towards a busbar in the battery module, and the first spraying part and the second spraying part are both communicated with the cooling liquid runner; and a cooling medium in the cooling liquid flow channel can be sprayed to the single battery cells and the busbar through the first spraying part and the second spraying part. According to the liquid cooling plate disclosed by the utility model, through the arrangement of the first spraying part and the second spraying part, the single battery cells and the busbar in the battery module can be simultaneously sprayed and cooled, so that the temperature rise of the busbar can be effectively inhibited, and the cooling effect of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a liquid cooling plate. The utility model also relates to a battery pack provided with the liquid cooling plate. Background Art

[0002] With the rapid development of high-voltage electrical system platforms for electric vehicles, the temperature rise of the cell bus in the battery pack structure has become an important factor restricting the popularization of high-voltage platforms and fast-charging rate battery packs.

[0003] The water cooling plate is an important component of the battery pack. In traditional battery packs, the water cooling plate is generally placed at the bottom or top to provide cooling for the battery module or battery pack. However, for high-voltage platforms and fast-charge rate battery packs, the existing cooling structure cannot meet the requirements of the bus temperature rise between the battery cells. Utility Model Content

[0004] In view of this, the utility model aims to provide a liquid cooling plate, which can spray-cool the single battery cells and the bus bar at the same time, thereby effectively suppressing the temperature rise of the bus bar.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A liquid cooling plate comprises a liquid cooling plate body having a cooling liquid flow channel;

[0007] A first spray portion and a second spray portion are provided on a side of the liquid cooling plate body facing the battery module, the first spray portion is arranged toward the single battery cell in the battery module, the second spray portion is arranged toward the bus bar in the battery module, and the first spray portion and the second spray portion are both connected to the coolant flow channel, and the cooling medium in the coolant flow channel can be sprayed onto the single battery cell and the bus bar through the first spray portion and the second spray portion.

[0008] Furthermore, a liquid inlet pipeline connected to the cooling liquid flow channel is provided at the liquid inlet of the liquid cooling plate body; and a pressurizing device for pressurizing the cooling medium in the cooling liquid flow channel is provided on the liquid inlet pipeline.

[0009] Furthermore, a liquid outlet pipeline connected to the cooling liquid flow channel is provided at the liquid outlet of the liquid cooling plate body; a recovery pipeline is provided on the liquid outlet pipeline, and the recovery pipeline is used to recover the cooling medium in the cooling liquid flow channel and the sprayed cooling medium.

[0010] Furthermore, the recovery pipeline is provided with a stop valve and a power device, and the recovery pipeline has an extension pipe extending into the module accommodating cavity of the shell, and the end of the extension pipe is provided with a liquid suction hole.

[0011] Furthermore, the cooling medium is an insulating coolant, and the insulating coolant is lubricating oil, transmission oil or fluorinated liquid.

[0012] Furthermore, the liquid cooling plate body includes a first plate body and a second plate body that are snap-fitted together; the cooling liquid flow channel is arranged between the first plate body and the second plate body; and the first spray part includes a plurality of first spray holes arranged on the first plate body.

[0013] Furthermore, a flow channel groove is provided on the first plate body; and the coolant flow channel is formed by the flow channel groove and the second plate body.

[0014] Furthermore, a box body corresponding to the bus is provided on the second plate body, and a cavity connected to the coolant flow channel is provided in the box body; the second spray part includes a plurality of second spray holes provided on the box body, each of the second spray holes is connected to the cavity, and each of the second spray holes is arranged toward the bus.

[0015] Furthermore, the battery module includes a plurality of battery packs, each of which has a plurality of single cells stacked together, and the bus bars are provided on opposite sides of the battery pack; the box bodies are a plurality of the bus bars arranged at intervals corresponding to the bus bars, and each of the box bodies is provided with a plurality of second spray holes arranged toward the bus bars.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The liquid cooling plate described in the utility model optimizes the structure of the liquid cooling plate so that the first spray part and the second spray part arranged on the liquid cooling plate can spray and cool the single cells and the bus in the battery module at the same time, thereby effectively suppressing the temperature rise of the bus and improving the cooling effect of the battery module.

[0018] In addition, the provided liquid inlet pipeline is conducive to the addition of coolant into the coolant flow channel, and the provided booster device pressurizes the cooling medium in the coolant flow channel to avoid the problem of inconsistent cooling effect of the battery module caused by the pressure reduction of the spray hole far away from the liquid inlet, thereby helping to improve the consistency of the cooling effect of the battery module. The provided liquid outlet pipeline and recovery pipeline are conducive to the recovery of the cooling medium in the liquid cooling plate body and the cooling medium sprayed out. The provided extension tube and liquid suction hole allow the extension tube to extend into the module accommodating cavity, and the coolant in the module accommodating cavity can be recovered through the liquid suction hole.

[0019] Secondly, the cooling medium uses insulating coolant, which can play a role of insulation protection while ensuring the cooling effect. The main body of the liquid cooling plate adopts a first plate body and a second plate body that are connected by snapping, and the first spray part adopts a plurality of first spray holes set on the first plate body. Its structure is simple, which is convenient for the processing and preparation of the main body of the liquid cooling plate, and also convenient for the design and implementation of the first spray part. The flow channel groove set on the first plate body and the second plate body are used to form a coolant flow channel, which makes the structure of the coolant flow channel relatively simple and easy to process and prepare.

[0020] In addition, a box body is arranged at a position corresponding to the busbar on the second plate body, a cavity connected to the coolant flow channel is arranged in the box body, and the second spray part adopts a plurality of second spray holes arranged on the second box body and connected to the cavity, which has a simple structure and is convenient for arranging the plurality of second spray holes toward the busbar. The box body is arranged to match the plurality of busbars, which is conducive to spray cooling of each busbar and further improves the cooling effect.

[0021] Another object of the present invention is to provide a battery pack, in which the liquid cooling plate as described above is provided.

[0022] The battery pack of the present invention, by adopting the liquid cooling plate as described above, can effectively suppress the temperature rise of the busbar, improve the cooling effect of the battery module, and help to increase the service life of the battery pack, and has a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic structural diagram of a liquid cooling plate according to an embodiment of the utility model from a first perspective;

[0025] Figure 2 This is a schematic structural diagram of the liquid cooling plate according to an embodiment of the utility model from a second viewing angle;

[0026] Figure 3 A schematic structural diagram of a battery pack according to an embodiment of the utility model from a first viewing angle;

[0027] Figure 4 A schematic structural diagram of a battery pack according to an embodiment of the present utility model from a second viewing angle;

[0028] Description of reference numerals:

[0029] 1. Liquid cooling plate body; 2. Supercharger; 3. Power unit;

[0030] 10. Battery module; 11. First plate body; 12. Second plate body; 121. Box body; 20. Lower shell body; 101. Cooling liquid flow channel; 102. Liquid inlet pipeline; 103. Liquid outlet pipeline; 104. Recovery pipeline; 105. Liquid suction hole; 100. First spray hole; 200. Second spray hole; 1001. Bus. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" 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 an indirect connection 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 in combination with specific circumstances.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0035] Embodiment 1

[0036] The present embodiment relates to a liquid cooling plate, which can spray-cool the single cells and busbars in a battery module at the same time, effectively suppress the temperature rise of the busbars, and improve the cooling effect of the battery module.

[0037] In terms of overall structure, Figure 1 and Figure 2As shown, the liquid cooling plate of this embodiment includes a liquid cooling plate body 1 having a cooling liquid flow channel 101. The liquid cooling plate body 1 is provided with a first spray part and a second spray part on the side facing the battery module 10, wherein the first spray part is arranged toward the single battery cell in the battery module 10, and the second spray part is arranged toward the bus 1001 in the battery module 10. Moreover, the first spray part and the second spray part are both connected to the cooling liquid flow channel 101, and the cooling medium in the cooling liquid flow channel 101 can be sprayed onto the single battery cell and the bus 1001 through the first spray part and the second spray part.

[0038] At this time, by providing the first spray part and the second spray part on the liquid cooling plate body 1 and utilizing the cooling medium in the cooling liquid flow channel 101, the cooling medium can be sprayed and cooled simultaneously on the single cells and the bus 1001 in the battery module 10 through the first spray part and the second spray part, thereby effectively suppressing the temperature rise of the bus 1001 and improving the cooling effect of the battery module 10.

[0039] Based on the above overall structure, in detail, continue to refer to Figure 1 and Figure 2 , and combined with Figure 3 and Figure 4 In this embodiment, the liquid cooling plate is arranged above the battery module 10 for detailed description. In the battery pack structure, the battery module 10 is accommodated in the lower shell 20 of the battery pack, that is, the lower shell 20 is provided with a module accommodating cavity, and the battery module 10 is accommodated in the module accommodating cavity.

[0040] As a preferred embodiment, in this embodiment, a liquid inlet pipe 102 connected to the coolant flow channel 101 is provided at the liquid inlet of the liquid cooling plate body 1, and the liquid inlet pipe 102 is used to add coolant to the coolant flow channel 101. In addition, a booster device 2 for pressurizing the cooling medium in the coolant flow channel 101 is provided on the liquid inlet pipe 102. The setting of the booster device 2 allows the cooling medium to be sprayed more smoothly on the single battery cell and the bus 1001, and can avoid the problem of inconsistent cooling effect of the battery module 10 caused by the pressure reduction of the spray hole far away from the liquid inlet position, thereby ensuring the consistency of the cooling effect of the battery module 10.

[0041] It should be noted that the above-mentioned boosting device 2 may adopt a boosting pump or a boosting motor, etc., so that the cooling medium in the coolant flow channel 101 has sufficient pressure to ensure the spraying effect of each spraying part.

[0042] In addition, continue to see Figures 1 to 4As shown, in this embodiment, a liquid outlet pipeline 103 connected to the cooling liquid channel 101 is provided at the liquid outlet of the liquid cooling plate body 1. In addition, a recovery pipeline 104 is also provided on the liquid outlet pipeline 103, and the recovery pipeline 104 is connected to the liquid outlet pipeline 103, and the recovery pipeline 104 is used to recover the cooling medium in the cooling liquid channel 101 and the cooling medium sprayed out.

[0043] Specifically, the recovery pipeline 104 and the liquid outlet pipeline 103 can be connected via a three-way interface, wherein the first interface and the second interface of the three-way interface are connected to the recovery pipeline 104 , and the third interface of the three-way interface is connected to the liquid outlet pipeline 103 .

[0044] In order to ensure the spraying effect and facilitate the recovery of the coolant, in this embodiment, a stop valve and a power device 3 are also provided on the recovery pipeline 104, and the recovery pipeline 104 has an extension pipe extending into the module accommodating cavity of the shell, and a plurality of suction holes 105 are provided at the end of the extension pipe. Among them, the power device 3 is, for example, a liquid suction pump. The stop valve is used to cut off the cooling medium in the flow channel of the recovery pipeline 104, that is, to disconnect the liquid outlet pipeline 103 and the recovery pipeline 104, so as to prevent the cooling medium in the coolant flow channel 101 from being discharged through the liquid outlet pipeline 103 and the recovery pipeline 104.

[0045] In a specific implementation, when in the spraying state, the stop valve is in the cut-off state. When the liquid cooling plate needs to be replaced, or when there is a lot of sprayed coolant remaining in the module accommodating cavity, the stop valve can be turned on, and the coolant in the coolant channel 101 and the sprayed coolant can be recovered by suction of the liquid pump.

[0046] Since the cooling medium in the existing liquid cooling plate is usually composed of ethylene glycol and water, the leakage of the coolant will cause insulation failure and short circuit in the battery pack, and even cause a safety accident. For this reason, the cooling medium in this embodiment is preferably an insulating coolant, which can be, for example, lubricating oil, transmission oil or fluorinated liquid. In this way, while ensuring the cooling effect, it can also play the role of insulation protection and improve the safety of the battery pack.

[0047] The liquid cooling plate body 1 of this embodiment includes a first plate body 11 and a second plate body 12 that are connected in a buckled manner. The cooling liquid flow channel 101 is provided between the first plate body 11 and the second plate body 12. Preferably, a flow channel groove is provided on the first plate body 11, and the cooling liquid flow channel 101 is formed by the flow channel groove and the second plate body 12. Among them, the first plate body 11 is also a plate body away from the battery module 10. The above-mentioned first spray part includes a plurality of first spray holes 100 provided on the first plate body 11.

[0048] The liquid cooling plate body 1 adopts a first plate body 11 and a second plate body 12 that are connected by buckling, and the first spray part adopts a plurality of first spray holes 100 arranged on the first plate body 11. The structure is simple, which is convenient for the processing and preparation of the liquid cooling plate body 1, and also convenient for the arrangement and implementation of the first spray part. Moreover, the flow channel groove arranged on the first plate body 11 and the second plate body 12 are used to form the coolant flow channel 101, which is conducive to the processing and preparation of the coolant flow channel 101.

[0049] As a preferred embodiment, in this embodiment, a box body 121 corresponding to the bus 1001 is provided on the second plate body 12, and a cavity connected to the coolant flow channel 101 is provided in the box body 121. The second spray part includes a plurality of second spray holes 200 provided on the box body 121, each second spray hole 200 is connected to the cavity, and each second spray hole 200 is arranged toward the bus 1001. At this time, the arrangement of the box body 121 can facilitate the arrangement of the plurality of second spray holes 200 toward the bus 1001, and the structure is simple, which is conducive to processing and preparation.

[0050] In this embodiment, combined with Figure 3 and Figure 4 As shown, the battery module 10 includes a plurality of battery packs, each of which has a plurality of single cells stacked together, and busbars 1001 are provided on opposite sides of the battery pack. Preferably, the box bodies 121 are arranged in a plurality corresponding to each busbar 1001, and each box body 121 is provided with a plurality of second spray holes 200 arranged toward the busbar 1001. At this time, the box bodies 121 are arranged in a plurality matching the plurality of busbars 1001, which is conducive to spray cooling of each busbar 1001, thereby further improving the spray cooling effect.

[0051] In this embodiment, the battery module 10 has a plurality of battery packs arranged side by side, and a bus 1001 is provided on opposite sides of each battery pack. The box body 121 is preferably arranged outside the bus 1001 and between two bus bars 1001 of two adjacent battery packs. The plurality of second spray holes 200 on each box body 121 are all arranged toward the corresponding bus bar 1001.

[0052] In addition, it should be noted that the diameters of the first spray hole 100 and the second spray hole 200 can be set accordingly according to actual needs. In addition, it should also be noted that the box body 121 can be integrally formed with the second plate body 12. During the specific preparation, the box body 121 can be prepared by stamping. Of course, a split structure can also be adopted, which is connected to the second plate body 12 by welding. In this case, corresponding to each box body 121, a connecting port connecting the inner cavity of the box body 121 is set on the second plate body 12 to make the coolant flow channel 101 conductive with the cavity.

[0053] The liquid cooling plate of this embodiment is structurally optimized so that the first spray part and the second spray part arranged on the liquid cooling plate can spray-cool the single cells and the bus 1001 in the battery module 10 at the same time, thereby effectively suppressing the temperature rise of the bus 1001 and improving the cooling effect of the battery module 10.

[0054] Embodiment 2

[0055] This embodiment relates to a battery pack, in which the liquid cooling plate described in the first embodiment is provided. Figure 3 and Figure 4 As shown, the liquid cooling plate is preferably arranged above the battery module 10, and the box body 121 on the liquid cooling plate main body 1 is arranged on the side of the bus 1001, so that the first spray hole 100 on the second plate body 12 is set toward the single battery cell in the battery module 10, and the second spray hole 200 on the box body 121 is arranged toward the bus 1001 in the battery module 10, so that the single battery cell and the bus 1001 can be spray cooled at the same time.

[0056] The battery pack of this embodiment, by adopting the liquid cooling plate of the first embodiment, can effectively suppress the temperature rise of the bus 1001, improve the cooling effect of the battery module 10, and help to increase the service life of the battery pack, and has a good use effect.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid cooling plate, characterized in that: It includes a liquid cooling plate body having a cooling liquid flow channel; A first spray portion and a second spray portion are provided on a side of the liquid cooling plate body facing the battery module, the first spray portion is arranged toward the single battery cell in the battery module, the second spray portion is arranged toward the bus bar in the battery module, and the first spray portion and the second spray portion are both connected to the coolant flow channel, and the cooling medium in the coolant flow channel can be sprayed onto the single battery cell and the bus bar through the first spray portion and the second spray portion.

2. The liquid cooling plate according to claim 1, characterized in that: A liquid inlet pipeline connected to the cooling liquid flow channel is provided at the liquid inlet of the liquid cooling plate body; The liquid inlet pipeline is provided with a pressure boosting device for pressurizing the cooling medium in the coolant flow channel.

3. The liquid cooling plate according to claim 1, characterized in that: A liquid outlet pipe connected to the cooling liquid flow channel is provided at the liquid outlet of the liquid cooling plate body; The liquid outlet pipeline is provided with a recovery pipeline, and the recovery pipeline is used to recover the cooling medium in the coolant flow channel and the sprayed cooling medium.

4. The liquid cooling plate according to claim 3, characterized in that: The recovery pipeline is provided with a stop valve and a power device, and the recovery pipeline has an extension pipe extending into the module accommodating cavity of the shell, and the end of the extension pipe is provided with a liquid suction hole.

5. The liquid cooling plate according to claim 1, characterized in that: The cooling medium is insulating coolant, and the insulating coolant is lubricating oil, gearbox oil or fluorinated liquid.

6. The liquid cooling plate according to any one of claims 1 to 5, characterized in that: The liquid cooling plate body comprises a first plate body and a second plate body which are buckled and connected; The cooling liquid flow channel is arranged between the first plate body and the second plate body; The first spraying part includes a plurality of first spraying holes arranged on the first plate body.

7. The liquid cooling plate according to claim 6, characterized in that: The first plate body is provided with a flow channel groove; The coolant flow channel is formed by the flow channel groove and the second plate body.

8. The liquid cooling plate according to claim 6, characterized in that: The second plate body is provided with a box body corresponding to the bus bar, and the box body is provided with a cavity connected to the coolant flow channel; The second spraying part includes a plurality of second spraying holes arranged on the box body, each of the second spraying holes is communicated with the cavity, and each of the second spraying holes is arranged toward the bus bar.

9. The liquid cooling plate according to claim 8, characterized in that: The battery module includes a plurality of battery packs, each of which has a plurality of single cells stacked together, and the busbars are disposed on opposite sides of the battery pack; The box bodies are multiple and arranged at intervals corresponding to the bus bars, and each of the box bodies is provided with multiple second spray holes arranged toward the bus bars.

10. A battery pack, characterized in that: The battery pack is provided with a liquid cooling plate according to any one of claims 1 to 9.

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