Liquid cooling plate, battery pack lower shell and battery pack

Abstract

The utility model relates to battery pack technical field and provide a kind of liquid cooling plate, battery pack lower shell and battery pack.The utility model discloses liquid cooling plate including cold plate main body, flow channel formed in cold plate main body and located on the first inlet and outlet pipe and multiple second inlet and outlet pipes of cold plate main body, and first inlet and outlet pipe and each second inlet and outlet pipe are communicated by flow channel respectively, along the thickness direction of cold plate main body, first inlet and outlet pipe are located in the middle part of the projection profile of cold plate main body, and each second inlet and outlet pipe is spaced apart along the circumference of the projection profile of cold plate main body.The utility model discloses liquid cooling plate is conducive to adjusting temperature difference for the temperature change of battery pack inner battery cell, to facilitate the use quality of battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a liquid cooling plate, a lower housing of a battery pack, and a battery pack. Background Technology

[0002] Against the backdrop of the rapid development of the global new energy vehicle industry, the battery pack, as the core energy carrier of new energy vehicles, directly determines the vehicle's range, safety performance, and lifespan. Within the battery pack, the performance of the battery thermal management system is crucial to battery life, safety, and charge / discharge efficiency.

[0003] When battery packs are installed in new energy vehicles, the complex driving conditions of the vehicle and the insufficient precision of the battery thermal management system result in uneven temperature distribution during cooling or heating, causing temperature differences among the cells in the battery pack. This is especially true during high-power charging and discharging, where the temperature difference is significant, which is detrimental to improving the quality of the battery pack. Utility Model Content

[0004] In view of this, the present invention aims to provide a liquid cooling plate to facilitate the adjustment of the temperature difference between the cells in the battery pack.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A liquid cooling plate includes a cooling plate body, a flow channel formed in the cooling plate body, and a first inlet / outlet pipe and a plurality of second inlet / outlet pipes disposed on the cooling plate body, wherein the first inlet / outlet pipe and each of the second inlet / outlet pipes are connected through the flow channel.

[0007] Along the thickness direction of the cold plate body, the first inlet and outlet pipe is located in the middle of the projected outline of the cold plate body, and each of the second inlet and outlet pipes is spaced apart along the periphery of the projected outline of the cold plate body.

[0008] Furthermore, from the projected outline of the cold plate body along its own thickness direction, the flow channel includes a first sub-flow channel located in the middle, and second sub-flow channels disposed on both sides of the first sub-flow channel along the length direction of the cold plate body.

[0009] Furthermore, the width W1 of the first sub-channel and the width W2 of the second sub-channel satisfy: W1:W2 = 1.5:1 to 1.1:1; and / or, the depth H1 of the first sub-channel and the depth H2 of the second sub-channel satisfy: H1:H2 = 1.5:1 to 1.1:1.

[0010] Furthermore, the first sub-channel has a plurality of first channel units spaced apart along the width direction of the cold plate body, and a first connecting unit connecting two adjacent first channel units; the second sub-channel has a plurality of second channel units spaced apart along the length direction of the cold plate body, and a second connecting unit connecting two adjacent second channel units; the spacing S1 between two adjacent first channel units and the spacing S2 between two adjacent second channel units satisfy: S1:S2=1.5:1~1.1:1.

[0011] Furthermore, the cold plate body includes a connected substrate and a flow channel plate, the flow channel being formed between the substrate and the flow channel plate, and the first inlet / outlet pipe and each of the second inlet / outlet pipes being disposed on the substrate; and / or, the cold plate body is made of aluminum alloy.

[0012] Furthermore, the cold plate body is also provided with an adjustment component, which is provided on each of the second inlet and outlet pipes so that the opening degree of the second inlet and outlet pipes is adjustable.

[0013] Furthermore, the adjustment assembly includes an adjustment plate disposed within the second inlet / outlet pipe, a driving member disposed on the cold plate body, and a connecting shaft disposed on the adjustment plate and connected to the driving end of the driving member; the driving member can drive the adjustment plate to rotate via the connecting shaft.

[0014] Furthermore, the cold plate body is provided with a mounting frame, and the driving component is located within the mounting frame.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] (1) The liquid cooling plate of this utility model arranges a first inlet and outlet pipe at the center of the cold plate and a second inlet and outlet pipe at the edge of the cold plate. The first inlet and outlet pipe and the second inlet and outlet pipe are connected by a flow channel, so that the coolant can flow from the center to the edge or from the edge to the center, which is convenient for adjusting the temperature difference of the battery cell. The first inlet and outlet pipe and each of the second inlet and outlet pipes are connected to each other, which is convenient for cooling in different areas, and helps to adjust the temperature difference according to the temperature change of the battery cell in the battery pack.

[0017] (2) The flow channel includes a first sub-flow channel located in the middle of the cold plate body and a second sub-flow channel located on both sides of the first sub-flow channel, which facilitates better regional cooling of the cells in different locations. The structure is simple and easy to design and implement.

[0018] (3) Make the widths of the first sub-channel and the second sub-channel proportional, and the width of the first sub-channel is greater than the width of the second sub-channel. This helps to reduce the temperature of the cells in the middle of the battery pack and facilitates better adjustment of the temperature difference of the cells in the battery pack. Make the depths of the first sub-channel and the second sub-channel proportional, and the depth of the first sub-channel is greater than the depth of the second sub-channel. This helps to reduce the temperature of the cells in the middle of the battery pack and facilitates adjustment of the temperature difference of the cells in the battery pack. This is also beneficial for design and implementation.

[0019] (4) The spacing between the first flow channel units of the first sub-flow channel and the spacing between the second flow channel units of the second sub-flow channel are proportional, and the spacing between the first flow channel units is greater than the spacing between the second flow channel units. This facilitates the arrangement of the first sub-flow channel and helps to better adjust the temperature of the cells in the middle of the battery pack, which is conducive to better adjustment of the temperature difference of the cells and helps with the design implementation.

[0020] (5) The main body of the cold plate includes a substrate and a flow channel plate, the flow channel is formed between the substrate and the flow channel plate, and the first inlet and outlet pipe and the second inlet and outlet pipe are both located on the substrate, which facilitates the processing and manufacturing of the main body of the cold plate and has a simple structure. The main body of the cold plate is made of aluminum alloy, which is easy to process and facilitates the lightweight design of the battery pack, which is helpful for design implementation.

[0021] (6) By adjusting the settings of the components, it is easy to adjust the opening of each second inlet and outlet pipe, so as to better adjust the temperature difference of the cells in the battery pack and facilitate the design implementation.

[0022] (7) The adjustment assembly includes an adjustment plate, a drive component and a connecting shaft. The structure is simple, which makes it easy to adjust the opening of the second inlet and outlet pipes and facilitates design and implementation.

[0023] (8) The installation frame facilitates the arrangement of the driving components on the cold plate body, and the structure is simple and easy to design and implement.

[0024] This utility model also proposes a lower housing of a battery pack, including a bottom plate and a side beam disposed on the bottom plate;

[0025] The base plate is made of liquid-cooled plate as described above.

[0026] This utility model also proposes a battery pack, wherein the battery pack is provided with the liquid cooling plate as described above.

[0027] The lower housing and battery pack of this utility model have the same beneficial effects as the liquid cooling plate described above compared with the prior art, so they will not be described again here. Attached Figure Description

[0028] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the liquid cooling plate described in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 Enlarged view of point A;

[0031] Figure 3 This is a schematic diagram of the flow channel structure of the liquid cooling plate according to an embodiment of the present utility model;

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Cold-rolled steel plate body;

[0034] 101. Substrate; 102. Flow channel plate;

[0035] 2. Flow channel;

[0036] 201, First sub-channel; 202, Second sub-channel;

[0037] 2011, First flow channel unit; 2012, First connecting unit; 2021, Second flow channel unit; 2022, Second connecting unit;

[0038] 3. First inlet / outlet pipe; 4. Second inlet / outlet pipe;

[0039] 5. Adjustment components;

[0040] 501. Adjusting plate; 502. Driving component; 503. Connecting shaft;

[0041] 6. Installation frame. Detailed Implementation

[0042] To make the technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] Furthermore, in the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0046] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0048] An embodiment of the first aspect of this utility model provides a liquid cooling plate, which is applied in the battery thermal management system of a battery pack. It is mainly used to adjust the temperature of the cells inside the battery pack. Furthermore, the liquid cooling plate in this embodiment, with its innovative structural design, can adjust the temperature difference of the cells when there is a large temperature difference inside the battery pack, thereby improving the quality of the battery pack.

[0049] In existing technologies, liquid cooling plates are often used in battery thermal management systems to cool the battery cells. Traditional liquid cooling plates use a design with water inlet on one side and water outlet on the other side, which results in an unreasonable distribution of coolant flow. This leads to a significant reduction in coolant flow rate at the end of the flow channel 2, resulting in a decrease in cooling effect. Furthermore, the cooling channel design of commonly used liquid cooling plates is relatively simple. In addition, liquid cooling plates cannot cool the battery cells in different areas within the battery pack, resulting in temperature differences among the battery cells and hindering the improvement of the battery pack's performance.

[0050] In view of this, in order to overcome the shortcomings of the prior art, the liquid cooling plate in this embodiment combines... Figures 1 to 3 As shown, the overall design includes a cold plate body 1, a flow channel 2, a first inlet / outlet pipe 3, and a second inlet / outlet pipe 4.

[0051] The flow channel 2 is formed in the cold plate body 1. The first inlet / outlet pipe 3 and a plurality of second inlet / outlet pipes 4 are disposed on the cold plate body 1. The first inlet / outlet pipe 3 and each of the second inlet / outlet pipes 4 are connected through the flow channel 2. Along the thickness direction of the cold plate body 1, the first inlet / outlet pipe 3 is located in the middle of the projected outline of the cold plate body 1, and each of the second inlet / outlet pipes 4 is spaced apart along the periphery of the projected outline of the cold plate body 1.

[0052] Therefore, by arranging the first inlet / outlet pipe 3 at the center of the cold plate and the second inlet / outlet pipe 4 at the edge of the cold plate, and connecting the first inlet / outlet pipe 3 and the second inlet / outlet pipe 4 through the flow channel 2, the coolant can flow from the center to the edge or from the edge to the center, which facilitates the adjustment of the cell temperature difference. Furthermore, the first inlet / outlet pipe 3 and each of the second inlet / outlet pipes 4 are connected separately, which facilitates regional cooling and helps to adjust the temperature difference according to the temperature changes of the cells in the battery pack.

[0053] Based on the above overall introduction, specifically, as an exemplary structural form, the cold plate body 1 in this embodiment is still composed of... Figures 1 to 3 As shown, it generally includes a connected substrate 101 and a flow channel plate 102, with a flow channel 2 formed between the substrate 101 and the flow channel plate 102. A first inlet / outlet pipe 3 and each of the second inlet / outlet pipes 4 are disposed on the substrate 101. This arrangement makes the cold plate body 1 include a substrate 101 and a flow channel plate 102, with the flow channel 2 formed between the substrate 101 and the flow channel plate 102, and the first inlet / outlet pipe 3 and the second inlet / outlet pipe 4 both disposed on the substrate 101. This facilitates the processing and manufacturing of the cold plate body 1 and results in a simple structure.

[0054] It is worth noting that the flow channel plate 102 generally has a recess. After the substrate 101 and the flow channel plate 102 are connected, the cavity formed by the recess on the flow channel plate 102 and the substrate 101 is the flow channel 2. The first inlet / outlet pipe 3 and each of the second inlet / outlet pipes 4 are connected through the flow channel 2.

[0055] Specifically, at the same time, coolant can flow in through the first inlet / outlet pipe 3, flow through the flow channel 2 and then flow out through each of the second inlet / outlet pipes 4, or flow in through each of the second inlet / outlet pipes 4, flow through the flow channel 2 and then flow out through the first inlet / outlet pipe 3, so that coolant can flow in from the middle of the cold plate body 1 and flow out from the edge, or flow in from the edge of the cold plate body 1 and flow out from the middle.

[0056] More specifically, in this embodiment, the main body 1 of the cold plate can be made of aluminum alloy, which makes the main body 1 of the cold plate easy to process and facilitates the lightweight design of the battery pack, thus aiding in the design and implementation.

[0057] Continue to combine Figures 1 to 3 As shown, in some exemplary embodiments, this embodiment may, for example, make the flow channel 2 in the cold plate body 1 include a first sub-flow channel 201 and a second sub-flow channel 202.

[0058] In this design, viewed from the projected outline of the cold plate body 1 along its thickness direction, the first sub-channel 201 is located in the middle of the projected outline of the cold plate body 1, and the second sub-channels 202 are distributed on both sides of the first sub-channel 201 along the length direction of the cold plate body 1. It is understood that having the channel 2 including the first sub-channel 201 located in the middle of the cold plate body 1 and the second sub-channels 202 located on both sides of the first sub-channel 201 facilitates better regional cooling of the cells in different locations, and the structure is simple and easy to design and implement.

[0059] Furthermore, it is worth noting that, depending on the different cell arrangement positions within the battery pack, besides arranging the first sub-channel 201 in the middle of the cold plate body 1, in other embodiments, the first sub-channel 201 can be further located in other positions on the cold plate body 1 (e.g., arranged on both sides of the crossbeams or longitudinal beams within the battery pack). This is also feasible. Thus, arranging the first sub-channel 201 and the second sub-channel 202 within the battery pack can better regulate the temperature difference between the cells within the battery pack.

[0060] Continue by Figure 3 As shown, taking the first sub-channel 201 arranged in the middle of the cold plate body 1 and the second sub-channel 202 arranged on both sides of the first sub-channel 201 as an example, in some exemplary embodiments, the width W1 of the first sub-channel 201 and the width W2 of the second sub-channel 202 satisfy the ratio W1:W2 = 1.5:1 to 1.1:1, and the depth H1 of the first sub-channel 201 and the depth H2 of the second sub-channel 202 satisfy the ratio H1:H2 = 1.5:1 to 1.1:1.

[0061] At this point, the widths of the first sub-channel 201 and the second sub-channel 202 are proportional, and the width of the first sub-channel 201 is greater than the width of the second sub-channel 202. This helps to reduce the temperature of the cells in the middle of the battery pack and facilitates better adjustment of the temperature difference between the cells within the battery pack. Furthermore, the depths of the first sub-channel 201 and the second sub-channel 202 are proportional, and the depth of the first sub-channel 201 is greater than the depth of the second sub-channel 202. This helps to further reduce the temperature of the cells in the middle of the battery pack, facilitates adjustment of the temperature difference between the cells within the battery pack, and facilitates design implementation.

[0062] It is worth noting that, in specific implementations, in addition to making the width and depth of the first sub-channel 201 and the second sub-channel 202 proportional as described above, in other embodiments, the width and depth of the first sub-channel 201 and the second sub-channel 202 are the same, which is also possible.

[0063] In some of the exemplary implementations, combined with Figure 3 As shown, the first sub-channel 201 may have, for example, a plurality of first channel units 2011 arranged at intervals along the width direction of the cold plate body 1, and a first connecting unit 2012 connecting two adjacent first channel units 2011. The second sub-channel 202 may have, for example, a plurality of second channel units 2021 arranged at intervals along the length direction of the cold plate body 1, and a second connecting unit 2022 connecting two adjacent second channel units 2021.

[0064] The spacing S1 between two adjacent first flow channel units 2011 and the spacing S2 between two adjacent second flow channel units 2021 satisfy a ratio of S1:S2 = 1.5:1 to 1.1:1. This ensures that the spacing between the first flow channel units 2011 of the first sub-flow channel 201 and the spacing between the second flow channel units 2021 of the second sub-flow channel 202 are proportional, and that the spacing between the first flow channel units 2011 is greater than the spacing between the second flow channel units 2021. This facilitates the arrangement of the first sub-flow channels 201, better regulates the temperature of the cells in the middle of the battery pack, and improves the temperature difference between the cells, thus aiding in design and implementation.

[0065] It is worth noting that, in specific implementations, in addition to making the spacing between two adjacent first flow channel units 2011 and the spacing between two adjacent second flow channel units 2021 proportional as described above, in other embodiments, the spacing between two adjacent first flow channel units 2011 and the spacing between two adjacent second flow channel units 2021 can also be the same.

[0066] Continue to combine Figures 1 to 3 As shown, in some exemplary embodiments, this embodiment may, for example, provide an adjustment component 5 on the cold plate body 1.

[0067] The adjustment component 5 is installed on each of the second inlet and outlet pipes 4 so that the opening degree of each second inlet and outlet pipe 4 is adjustable. The setting of the adjustment component 5 makes it easy to adjust the opening degree of each second inlet and outlet pipe 4, so as to better adjust the temperature difference of the cells in the battery pack and facilitate the design and implementation.

[0068] Specifically, in practical implementation, the adjustment assembly 5 includes an adjustment plate 501, a driving component 502, and a connecting shaft 503. The adjustment plate 501 is disposed inside the second inlet / outlet pipe 4, and can block the second inlet / outlet pipe 4 when parallel to its opening. The driving component 502 is disposed on the cold plate body 1 and located on one side of the second inlet / outlet pipe 4. The power output end of the driving component 502 is fixedly connected to one end of the connecting shaft 503, and the other end of the connecting shaft 503 is fixedly connected to the adjustment plate 501. When the driving component 502 drives the connecting shaft 503 to rotate, the adjustment plate 501 rotates together with the connecting shaft 503 under the transmission of the connecting shaft 503, thereby adjusting the opening degree of the second inlet / outlet pipe 4. It can be understood that the adjustment assembly 5, including the adjustment plate 501, the driving component 502, and the connecting shaft 503, has a simple structure, facilitates the adjustment of the opening degree of the second inlet / outlet pipe 4, and is conducive to design and implementation.

[0069] Furthermore, it is worth noting that in specific implementations, the drive component 502 can be, for example, a motor (such as a servo motor), and the end of the connecting shaft 503 connected to the adjusting plate 501 can be fixed by welding, while the power output end of the connecting shaft 503 and the drive component 502 can be fixed by bolts.

[0070] In some exemplary embodiments, this embodiment may, for example, provide a mounting frame 6 on the cold plate body 1 and arrange the drive component 502 within the mounting frame 6.

[0071] The mounting frame 6 includes a frame on the cold plate body 1 and a top cover fastened to the frame. The space enclosed between the top cover and the frame is the mounting space for the drive component 502. The mounting frame 6 facilitates the arrangement of the drive component 502 on the cold plate body 1, and the structure is simple and easy to design and implement.

[0072] At this point, it is understandable that the drive unit 502 is located within the mounting frame 6 and will not affect other structures within the battery pack. Furthermore, it facilitates the arrangement of other components within the battery pack, and there is no need to worry about damaging the drive unit 502 while arranging other components within the battery pack.

[0073] It is worth noting that, regarding the liquid cooling plate of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 3As shown, it may include, for example, a cold plate body 1 with a flow channel 2 formed inside, a first inlet and outlet, a second inlet and outlet, and an adjustment assembly 5.

[0074] The cold plate body 1 includes a substrate 101 and a flow channel plate 102. A first sub-flow channel 201 and a second sub-flow channel 202 located on both sides of the first sub-flow channel 201 are formed between the substrate 101 and the flow channel plate 102. The first sub-flow channel 201 is located in the middle of the cold plate body 1 and has a width of W1 and a depth of H1. Looking along the length direction of the cold plate body 1, the second sub-flow channels 202 are located on both sides of the first sub-flow channel 201 and have a width of W2 and a depth of H2. The first sub-flow channel 201 has a plurality of first flow channel units arranged at intervals along the width direction of the cold plate body 1. The first flow channel unit 2011 and the first connecting unit 2012 connecting two adjacent first flow channel units 2011 are included. The second sub-flow channel 202 has a plurality of second flow channel units 2021 arranged at intervals along the length direction of the cold plate body 1 and a second connecting unit 2022 connecting two adjacent second flow channel units 2021. The distance between two connected first flow channel units 2011 is S1, the distance between two adjacent second flow channel units 2021 is S2, and W1:W2=1.5:1, H1:H2=1.5:1, S1:S2=1.5:1.

[0075] The first inlet and outlet are located in the middle of the projected outline of the cold plate body 1 along the thickness direction, and the four second inlets and outlets are spaced apart along the periphery of the projected outline of the cold plate body 1. The first inlet and outlet and each of the second inlets and outlets are connected through the flow channel 2.

[0076] The adjustment assembly 5 includes an adjustment plate 501 disposed on each of the second inlets and outlets, a drive member 502 disposed on the main body of the cold plate 1 and located on one side of each of the second inlets and outlets, and a connecting shaft 503 connecting the adjustment plate 501 and the drive member 502. The connecting shaft 503 is fixedly connected to the adjustment plate 501 by welding, and the connecting shaft 503 is fixedly connected to the drive frame by bolts.

[0077] In the above preferred embodiments, the specific settings and arrangements of the cold plate body 1, the first inlet and outlet, the second inlet and outlet, and the adjustment component 5 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the cold plate body 1, the first inlet and outlet, the second inlet and outlet, and the adjustment component 5 can also be referred to the descriptions in the above exemplary embodiments.

[0078] The liquid cooling plate of this embodiment adopts the above design. Through the first inlet and outlet located in the middle of the main body 1 and the second inlet and outlet located at the edge of the main body 1, as well as the flow channel 2 provided in the main body 1, the coolant can flow from the middle of the main body 1 and flow out from the edge or from the edge and flow out from the middle. This is conducive to adjusting the temperature of the cells in the battery pack. The setting of the adjustment component 5 makes it easy to adjust the opening of the second inlet and outlet, so as to better regulate the temperature difference of the cells in the battery pack. This allows the battery pack to work at a suitable temperature and with a small temperature difference, which is beneficial to improving the quality of the battery pack.

[0079] A second aspect of this utility model provides a lower housing for a battery pack, which includes a base plate and side beams disposed on the base plate. The base plate is made of a liquid-cooled plate as described above.

[0080] The lower housing of the battery pack in this embodiment, by employing the liquid cooling plate as described above, can effectively regulate the temperature difference of the cells inside the battery pack, enabling the battery pack to operate at a suitable temperature with a small temperature difference, which is beneficial to improving the quality of the battery pack.

[0081] A third aspect of this utility model provides a battery pack having a lower housing as described above.

[0082] The battery pack of this embodiment, by adopting the lower housing of the battery pack as described above, can effectively regulate the temperature difference of the cells inside the battery pack, so that the battery pack can work under a suitable temperature and with a small temperature difference, which is beneficial to improving the quality of the battery pack.

[0083] The above descriptions are merely some embodiments of this utility model and are not intended to limit the utility model. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A liquid-cooled plate, characterized in that: It includes a cold plate body, a flow channel formed in the cold plate body, and a first inlet / outlet pipe and a plurality of second inlet / outlet pipes disposed on the cold plate body, wherein the first inlet / outlet pipe and each of the second inlet / outlet pipes are respectively connected through the flow channel; Along the thickness direction of the cold plate body, the first inlet and outlet pipe is located in the middle of the projected outline of the cold plate body, and each of the second inlet and outlet pipes is spaced apart along the periphery of the projected outline of the cold plate body.

2. The liquid cooling plate according to claim 1, characterized in that: From the projected outline of the cold plate body along its own thickness direction, the flow channel includes a first sub-flow channel located in the middle, and second sub-flow channels disposed on both sides of the first sub-flow channel along the length direction of the cold plate body.

3. The liquid cooling plate according to claim 2, characterized in that: The width W1 of the first sub-channel and the width W2 of the second sub-channel satisfy: W1:W2 = 1.5:1 to 1.1:1; and / or, The depth H1 of the first sub-channel and the depth H2 of the second sub-channel satisfy: H1:H2 = 1.5:1 to 1.1:

1.

4. The liquid cooling plate according to claim 2, characterized in that: The first sub-channel has a plurality of first channel units arranged at intervals along the width direction of the cold plate body, and a first connecting unit connecting two adjacent first channel units. The second sub-channel has a plurality of second channel units arranged at intervals along the length direction of the cold plate body, and a second connecting unit connecting two adjacent second channel units; The spacing S1 between two adjacent first flow channel units and the spacing S2 between two adjacent second flow channel units satisfy the following: S1:S2 = 1.5:1 to 1.1:

1.

5. The liquid cooling plate according to claim 1, characterized in that: The cold plate body includes a connected substrate and a flow channel plate, the flow channel being formed between the substrate and the flow channel plate, and the first inlet / outlet pipe and each of the second inlet / outlet pipes being disposed on the substrate; and / or, The main body of the cold plate is made of aluminum alloy.

6. The liquid-cooled plate according to any one of claims 1-5, characterized in that: The cold plate body is also provided with an adjustment component, which is provided on each of the second inlet and outlet pipes so that the opening degree of the second inlet and outlet pipes is adjustable.

7. The liquid cooling plate according to claim 6, characterized in that: The adjustment assembly includes an adjustment plate disposed in the second inlet / outlet pipe, a driving member disposed on the cold plate body, and a connecting shaft disposed on the adjustment plate and connected to the driving end of the driving member; The driving component can drive the adjusting plate to rotate via the connecting shaft.

8. The liquid cooling plate according to claim 7, characterized in that: The cold plate body is provided with a mounting frame, and the driving component is located inside the mounting frame.

9. A lower housing of a battery pack, characterized in that: Includes a base plate and side beams disposed on the base plate; The base plate is the liquid-cooled plate according to any one of claims 1-8.

10. A battery pack, characterized in that: The battery pack includes a lower housing as described in claim 9.

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