Integrated battery pack

Abstract

Integrated battery pack, characterized in that it comprises: a battery housing (1) comprising a cover body (11) and a base plate (12), wherein the cover body (11) is connected to a side of the base plate (12); a battery pack (2) arranged between the cover body (11) and the base plate (12) and connected to the base plate (12); a first water cooling device (3) arranged on the base plate (12) and used to cool a side of the battery pack (2) facing the base plate (12); a second water cooling device (4) arranged on a side of the battery pack (2) facing away from the base plate (12) and used to cool a side of the battery pack (2) facing away from the base plate (12).

Description

An integrated battery pack Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to an integrated battery pack. Background Art

[0002] With the development of new energy technologies, battery packs are widely used in transportation applications such as automobiles and construction machinery. A battery pack primarily consists of a battery case and battery modules. As the carrier of the battery modules, the battery case plays a crucial role in ensuring their safe operation and protection. This requires the battery case to not only meet performance requirements for impact resistance, vibration resistance, and bottom ball resistance, but also provide excellent cooling performance.

[0003] At present, a water cooling system is usually configured outside the battery box to dissipate heat and cool the battery module, but the cooling effect is limited. Moreover, the number and types of parts of the water cooling system are large, the assembly process is complicated, and the production cost is high.

[0004] Summary of the Invention

[0005] The problem solved by the present invention is: how to optimize the structure of the battery pack to simplify the assembly process and improve the cooling effect.

[0006] To solve the above problems, the present invention provides an integrated battery pack, comprising:

[0007] A battery box comprising a cover and a bottom plate, wherein the cover is connected to one side of the bottom plate;

[0008] a battery pack, disposed between the cover and the bottom plate, and connected to the bottom plate;

[0009] a first water cooling device, provided on the bottom plate and used to cool a side of the battery pack facing the bottom plate;

[0010] The second water cooling device is provided on a side of the battery pack away from the bottom plate and is used to cool the side of the battery pack away from the bottom plate.

[0011] The present invention can integrate a first water cooling device on the bottom plate of the battery box to perform water cooling on the side of the battery pack facing the bottom plate. At the same time, a second water cooling device is provided on the side of the battery pack facing away from the bottom plate to perform water cooling on the side of the battery pack facing away from the bottom plate. In this way, the upper and lower sides of the battery pack are respectively dissipated with two sets of water cooling devices, which can effectively reduce the heat generated by the battery pack during operation and meet the high-power fast charging or fast discharging requirements of the battery pack. Moreover, by integrating the first water cooling device and the second water cooling device on the battery pack to form an integrated battery pack, not only the number and types of parts of the water cooling device can be reduced, thereby reducing production costs, but the integrated battery pack can also be assembled on the whole vehicle as a whole. Compared with assembling the battery pack and the water cooling system separately on the whole vehicle, this greatly simplifies the assembly process.

[0012] Optionally, the first water cooling device includes a first water cooling channel, a first cooling pipeline and a first sealing member, the first cooling pipeline is provided with a first water inlet and a first water outlet, and the first cooling pipeline is arranged on the base plate and is connected to the first water cooling channel, the base plate is provided with a through cavity that passes through the base plate along the length direction of the base plate, the first water cooling channel is arranged in the through cavity and passes through the base plate along the length direction of the base plate, and the first sealing member is used to block both ends of the first water cooling channel.

[0013] In this way, the first water-cooling channel of the first water-cooling device can be arranged in the through-cavity of the base plate to utilize the internal space of the base plate as the water-cooling channel, thereby simplifying the structure and occupied volume of the first water-cooling device. At the same time, the two ends of the first water-cooling channel are sealed with the first blocking member to form a closed water-cooling channel. In this way, when the first water-cooling device is used to cool the battery pack, the cooling water flows into the first cooling pipeline from the first water inlet of the first cooling pipeline and flows through the first water-cooling channel to take away the heat transferred to the base plate by the battery pack, and then flows out of the first cooling pipeline from the first water outlet of the first cooling pipeline to achieve water-cooled heat dissipation.

[0014] Optionally, the first cooling pipeline is located outside the battery box.

[0015] In this way, by arranging the first cooling line outside the battery box, dry and wet separation is achieved, thereby reducing the risk of short circuit due to leakage of the cooling line; moreover, the volume of the cover can be reduced, reducing the overall weight of the integrated battery pack.

[0016] Optionally, a plurality of the first water-cooling channels are provided, and the plurality of the first water-cooling channels are arranged at intervals and are respectively connected to the first cooling pipeline.

[0017] In this way, by arranging a plurality of first water-cooling channels at intervals on the bottom plate, the heat dissipation area of ​​the first water-cooling device is increased, thereby improving the heat dissipation effect.

[0018] Optionally, the first water cooling device is provided with multiple groups, and the first water cooling channels of the multiple groups of the first water cooling devices are arranged side by side along the width direction of the base plate, and the first cooling pipes of the multiple groups of the first water cooling devices are arranged side by side along the length direction of the base plate.

[0019] In this way, by arranging multiple groups of first water cooling devices on the base plate, the heat dissipation area can be further increased and the heat dissipation effect can be improved. At the same time, by arranging the first water cooling channels of multiple groups of first water cooling devices side by side along the width direction of the base plate, it is convenient to process the first water cooling channels on the base plate. Similarly, by arranging the first cooling pipes of multiple groups of first water cooling devices side by side along the length direction of the base plate, the first cooling pipes can be arranged more compactly on the base plate.

[0020] Optionally, the second water cooling device includes a heat sink with a hollow structure, the internal space of the heat sink constituting a second water cooling channel, the second cold water channel extending along the length direction of the battery pack, and a second water inlet and a second water outlet being provided on the heat sink, the second water inlet being connected to the second water outlet through the second water cooling channel.

[0021] In this way, cooling water can be introduced into the second water inlet on the heat sink, allowing the cooling water to flow through the second water-cooling channel in the heat sink and out of the second water outlet to take away the heat transferred from the battery pack to the heat sink, thereby realizing the second water cooling device to dissipate heat and cool the side of the battery pack away from the bottom plate. Moreover, the second water cooling device has a simple structure and is easy to process and manufacture.

[0022] Optionally, the second water cooling device further includes a second cooling pipeline, and the second water inlet and the second water outlet are respectively connected to the first water cooling channel through the second cooling pipeline.

[0023] In this way, by setting up a second cooling pipeline, and making the second water inlet and the second water outlet connected to the first water-cooling channel respectively through the second cooling pipeline, the water-cooling channels of the first water-cooling device and the second water-cooling device can be connected in series. Moreover, it is possible to avoid connecting the cooling pipeline to the second water inlet and the second water outlet by passing through the cover body, thereby reducing the operation of opening holes on the cover body. At the same time, there is no need to additionally configure the second water-cooling device with a water inlet interface and a water outlet interface on the outside of the battery box, thereby simplifying the pipeline layout of the first water-cooling device and the second water-cooling device.

[0024] Optionally, the second water inlet and the second water outlet are located on the same side of the heat sink.

[0025] In this way, the distances between the second water inlet and the second water outlet and the first cooling pipeline can be shortened, thereby facilitating the layout of the pipeline.

[0026] Optionally, the base plate includes two first plates and at least one second plate, the second plate is arranged between the two first plates, one end of the first plate is used to be connected to the entire vehicle, and the other end is connected to the second plate.

[0027] In this way, by designing the base plate to be composed of a modular first plate and a modular second plate, not only can the types and quantities of base plates be reduced and production costs be reduced, but the base plate can also be adapted to battery packs of different volumes by changing the number of second plates, so that the base plate can be expanded and contracted as needed and has high adaptability.

[0028] Optionally, the second water cooling device is bonded to a side of the battery pack facing away from the base plate, and / or the battery pack is bonded to the base plate.

[0029] In this way, not only can the bolt connections be reduced, but also the module mounting brackets in the battery box can be reduced, which improves the convenience during assembly and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram of an exploded structure of an integrated battery pack according to an embodiment of the present invention;

[0031] FIG2 is a schematic structural diagram of an integrated battery pack according to an embodiment of the present invention;

[0032] FIG3 is a schematic structural diagram of an integrated battery pack when the cover and the base plate are separated according to an embodiment of the present invention;

[0033] FIG4 is a partial enlarged view of a situation at point A in FIG3 ;

[0034] FIG5 is a partial enlarged view of another situation at point A in FIG3 ;

[0035] FIG6 is a schematic structural diagram of a bottom plate according to an embodiment of the present invention;

[0036] FIG7 is a partial enlarged view of point B in FIG6;

[0037] FIG8 is a schematic structural diagram of a second water cooling device in an embodiment of the present invention.

[0038] Explanation of the accompanying drawings: 1. Battery box; 11. Cover; 12. Bottom plate; 121. First plate; 122. Second plate; 2. Battery pack; 3. First water cooling device; 31. First water cooling channel; 32. First cooling pipeline; 33. First blocking member; 4. Second water cooling device; 41. Heat sink; 411. Second water inlet; 412. Second water outlet; 42. Second cooling pipeline; 5. Bushing; 6. First glue layer structure. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] The Z-axis in the accompanying drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis (i.e., the direction of the arrow on the Z-axis) represents the top, and the reverse direction of the Z-axis represents the bottom; the X-axis in the accompanying drawings represents the horizontal direction and is designated as the left and right positions, with the positive direction of the X-axis representing the left side and the reverse direction of the X-axis representing the right side; the Y-axis in the accompanying drawings represents the front and back positions, with the positive direction of the Y-axis representing the front side and the reverse direction of the Y-axis representing the back side; it should also be noted that the aforementioned Z-axis, Y-axis, and X-axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be practiced in an order other than that illustrated or described herein.

[0042] As shown in Figure 1, an embodiment of the present invention provides an integrated battery pack, including: a battery box 1, including a cover 11 and a base plate 12, the cover 11 being connected to one side of the base plate 12; a battery pack 2, arranged between the cover 11 and the base plate 12, and connected to the base plate 12; a first water cooling device 3, arranged on the base plate 12, and used to cool the side of the battery pack 2 facing the base plate 12; a second water cooling device 4, arranged on the side of the battery pack 2 away from the base plate 12, and used to cool the side of the battery pack 2 away from the base plate 12.

[0043] Specifically, the cover 11 of the battery box 1 is a semi-enclosed structure, the bottom plate 12 is a flat plate structure, the battery pack 2 is mounted on the bottom plate 12, and the cover 11 is provided on the battery pack 2 and is usually fixed to the bottom plate 12 using a rotary tapping riveting process (i.e., FDS process). The first water cooling device 3 is integrated on the bottom plate 12 and is used to water-cool the side of the battery pack 2 facing the bottom plate 12. The second water cooling device 4 is provided on the side of the battery pack 2 facing away from the bottom plate 12 and is connected to the battery pack 2 or the cover 11 to water-cool the side of the battery pack 2 facing away from the bottom plate 12. In addition, when the integrated battery pack is assembled on the whole vehicle, the bottom plate 12 is usually fixed to the whole vehicle by riveting through the bushing 5 so that the integrated battery pack is fixed to the whole vehicle.

[0044] In this embodiment, a first water cooling device 3 can be integrated on the bottom plate 12 of the battery box 1 to perform water cooling on the side of the battery pack 2 facing the bottom plate 12. At the same time, a second water cooling device 4 can be provided on the side of the battery pack 2 away from the bottom plate 12 to perform water cooling on the side of the battery pack 2 away from the bottom plate 12. In this way, the upper and lower sides of the battery pack 2 are respectively dissipated with two sets of water cooling devices, which can effectively reduce the heat generated by the battery pack during operation and meet the high-power fast charging or fast discharging requirements of the battery pack. Moreover, by integrating the first water cooling device 3 and the second water cooling device 4 on the battery pack to form an integrated battery pack, not only the number and types of parts of the water cooling device can be reduced, thereby reducing production costs, but the integrated battery pack can also be assembled on the entire vehicle as a whole. Compared with assembling the battery pack and the water cooling system separately on the entire vehicle, this greatly simplifies the assembly process.

[0045] Optionally, the second water cooling device 4 is bonded to a side of the battery pack 2 facing away from the bottom plate 12 , and / or the battery pack 2 is bonded to the bottom plate 12 .

[0046] In this embodiment, the lower end of the battery pack 2 is connected to the base plate 12, and the second water-cooling device 4 is installed on the side of the battery pack 2 facing away from the base plate 12, that is, the second water-cooling device 4 is installed at the upper end of the battery pack 2. Moreover, a first glue layer structure 6 is usually provided between the second water-cooling device 4 and the battery pack 2, that is, the second water-cooling device 4 is fixed to the upper end of the battery pack 2 by bonding. Similarly, a second glue layer structure is usually provided between the battery pack 2 and the base plate 12, that is, the battery pack 2 can also be fixed to the base plate 12 by bonding. This not only reduces bolt connections, but also reduces module mounting brackets and the like within the battery box 1, thereby improving assembly convenience and reducing production costs.

[0047] Optionally, in combination with Figures 3, 4, 6 and 7, the first water cooling device 3 includes a first water cooling channel 31, a first cooling pipeline 32 and a first blocking member 33. The first cooling pipeline 32 is provided with a first water inlet and a first water outlet, and the first cooling pipeline 32 is provided on the base plate 12 and is connected to the first water cooling channel 31. The base plate 12 is provided with a through cavity that penetrates the base plate 12 along the length direction of the base plate 12. The first water cooling channel 31 is provided in the through cavity and penetrates the base plate 12 along the length direction of the base plate 12. The first blocking member 33 is used to block both ends of the first water cooling channel 31.

[0048] It should be noted that the length direction of the base plate 12 is the X-axis direction (i.e., the left-right direction) in Figure 3, which is also the extension direction of the base plate 12. Correspondingly, the width direction of the base plate 12 is the Y-axis direction (i.e., the front-back direction) in Figure 3, and the through cavity is extended along the length direction of the base plate 12, that is, the extension direction of the through cavity is consistent with the length direction of the base plate 12.

[0049] Specifically, the battery pack 2 is typically arranged on the base plate 12 along its length. The base plate 12 is a hollow structure having a through cavity, which extends along its length and penetrates the base plate 12. The first water-cooling channel 31 of the first water-cooling device 3 is disposed within the through cavity of the base plate 12 and penetrates the base plate 12 along its length. That is, the first water-cooling channel 31 extends from the left end to the right end of the base plate 12, and the left and right ends of the first water-cooling channel 31 are open, that is, the first water-cooling channel 31 is also equivalent to part of the through cavity. The left and right ends of the first water-cooling channel 31 are sealed with the first blocking member 33 to form a closed water-cooling channel. The first cooling pipe 32 of the first water cooling device 3 is usually located on the left or right side of the battery pack 2, and a first water inlet and a first water outlet are provided on the first cooling pipe 32. The upper end surface of the base plate 12 is usually provided with a through-hole structure connected to the first water cooling channel 31. The first cooling pipe 32 is connected to the through-hole structure through a joint to connect the first cooling pipe 32 with the first water cooling channel 31.

[0050] In this embodiment, the first water-cooling channel 31 of the first water-cooling device 3 can be set in the through-cavity of the base plate 12 so that the internal space of the base plate 12 can be used as the water-cooling channel, thereby simplifying the structure and occupied volume of the first water-cooling device 3. At the same time, the two ends of the first water-cooling channel 31 are blocked with the first blocking member 33 to form a closed water-cooling channel. In this way, when the first water-cooling device 3 is used to cool the battery pack 2, the cooling water flows into the first cooling pipeline 32 from the first water inlet of the first cooling pipeline 32, and flows through the first water-cooling channel 31 to take away the heat transferred from the battery pack 2 to the base plate 12, and then flows out of the first cooling pipeline 32 from the first water outlet of the first cooling pipeline 32 to achieve water-cooled heat dissipation.

[0051] Optionally, as shown in FIG. 2 , the first cooling pipeline 32 is located outside the cover 11 .

[0052] Specifically, the orthographic projection of the cover 11 on the base plate 12 is located on the base plate 12, that is, the area of ​​the base plate 12 is larger than the area of ​​the cover 11. During assembly, the cover 11 is placed over the battery pack 2, and the first cooling pipe 32 is located outside the cover 11.

[0053] In this embodiment, the first cooling line 32 is arranged outside the battery box 1 to achieve dry and wet separation, thereby reducing the risk of short circuit due to leakage of the cooling line; moreover, the volume of the cover 11 can be reduced, thereby reducing the overall weight of the integrated battery pack.

[0054] Optionally, as shown in FIG. 4 and FIG. 7 , a plurality of first water-cooling channels 31 are provided, and the plurality of first water-cooling channels 31 are arranged at intervals and are respectively connected to the first cooling pipeline 32 .

[0055] Specifically, the through cavity of the bottom plate 12 is divided into a plurality of cavities, and the cavities penetrate the bottom plate 12 along the length direction of the bottom plate 12 , and a portion of the plurality of cavities constitute a plurality of first water-cooling channels 31 .

[0056] In this embodiment, a plurality of first water-cooling channels 31 are provided at intervals on the bottom plate 12 to increase the heat dissipation area of ​​the first water-cooling device 3 and improve the heat dissipation effect.

[0057] Optionally, in combination with Figures 4 and 7, the first water cooling device 3 is provided with multiple groups, and the first water cooling channels 31 of the multiple groups of first water cooling devices 3 are arranged side by side along the width direction of the base plate 12, and the first cooling pipes 32 of the multiple groups of first water cooling devices 3 are arranged side by side along the length direction of the base plate 12.

[0058] Specifically, FIG4 shows an example in which three groups of first water-cooling devices 3 are provided, and each group of first water-cooling devices 3 has multiple first water-cooling channels 31. The first water-cooling channels 31 of the three groups of first water-cooling devices 3 are parallel to each other and spaced apart along the width direction of the base plate 12. The first cooling pipes 32 of the three groups of first water-cooling devices 3 are parallel to each other and spaced apart along the length direction of the base plate 12. In addition, in a group of first water-cooling devices 3, the cross-sectional shapes of the multiple first water-cooling channels 31 can be set to be the same or similar, or they can be set to be different. Accordingly, the first blocking members 33 corresponding to these multiple first water-cooling channels 31 can be set to be the same or different. For example, FIG4 shows an example in which a group of first water-cooling devices 3 is provided with three first water-cooling channels 31, two of which are configured as flat rectangular channel structures, while the remaining one is configured as a conventional rectangular channel structure. Similarly, the lengths of the first cooling pipes 32 of the three groups of first water-cooling devices 3 can be set to be the same or different.

[0059] In this embodiment, multiple groups of first water cooling devices 3 are arranged on the base plate 12 to further increase the heat dissipation area and improve the heat dissipation effect. At the same time, the first water cooling channels 31 of the multiple groups of first water cooling devices 3 are arranged side by side along the width direction of the base plate 12 to facilitate the processing of the first water cooling channels 31 on the base plate 12. Similarly, the first cooling pipes 32 of the multiple groups of first water cooling devices 3 are arranged side by side along the length direction of the base plate 12 to make the first cooling pipes 32 more compactly arranged on the base plate 12.

[0060] Optionally, as shown in Figure 6, the base plate 12 includes two first plates 121 and at least one second plate 122, the second plate 122 is arranged between the two first plates 121, one end of the first plate 121 is used to connect to the entire vehicle, and the other end is connected to the second plate 122.

[0061] Specifically, the base plate 12 is formed by two modular first plates 121 and at least one modular second plate 122, wherein the first plate 121 and the second plate 122 are generally plate structures made by extrusion molding, and the two first plates 121 serve as the two ends in the width direction of the base plate 12 (i.e., the front and rear ends of the base plate 12), and at least one second plate 122 is located between the two first plates 121, and the first plate 121 and the second plate 122 and the second plate 122 are generally welded by stir friction welding technology (i.e., FSW welding technology), and the end of the first plate 121 away from the second plate 122 is generally fixed to the entire vehicle by riveting with a bushing 5 to achieve installation and fixation between the integrated battery pack and the entire vehicle.

[0062] In this embodiment, by designing the base plate 12 to be composed of a modular first plate 121 and a modular second plate 122, not only can the number and type of base plates 12 be reduced, thereby lowering production costs, but the base plate 12 can also be adapted to battery packs 2 of varying sizes by varying the number of second plates 122, allowing the base plate 12 to be expanded and contracted as needed, thus providing a high degree of adaptability. Furthermore, the first plate 121 and the second plate 122 can be easily processed using an extrusion molding process to flatten the base plate 12, thereby reducing the overall height of the battery box 1.

[0063] Furthermore, a first water-cooling channel 31 is provided on the first plate 121 and the second plate 122 respectively.

[0064] In this embodiment, when the size of the bottom plate 12 is changed by increasing or decreasing the number of the second plates 122 , the heat dissipation area of ​​the first water-cooling channel 31 can also be changed accordingly, so as to adapt to battery packs 2 of different volumes.

[0065] Optionally, as shown in FIG6 and FIG7 , the cross-sections of the first plate body 121 and the second plate body 122 are hollow structures.

[0066] In this embodiment, the cross-section of the bottom plate 12 is designed to be a hollow structure so that cavities of different shapes are formed in the bottom plate 12, thereby facilitating selection of the required cavity as the first water-cooling channel 31 to dissipate heat for the battery pack 2 according to actual needs. At the same time, the bottom plate 12 with a hollow cross-section can also improve the bottom plate 12's resistance to bottom ball impact performance.

[0067] Optionally, in combination with Figures 4 and 8, the second water cooling device 4 includes a heat sink 41 with a hollow structure, the internal space of the heat sink 41 constitutes a second water cooling channel, the second cold water channel extends along the length direction of the battery pack 2, and a second water inlet 411 and a second water outlet 412 are provided on the heat sink 41, and the second water inlet 411 is connected to the second water outlet 412 through the second water cooling channel.

[0068] Specifically, the heat sink 41 is extended along the length of the battery pack 2. The heat sink 41 can be a whole hollow flat plate structure. In this case, the second water-cooling channel is distributed in a serpentine shape in the heat sink 41. The second water inlet 411 is connected to the water inlet end of the second water-cooling channel, and the second water outlet 412 is connected to the water outlet end of the second water-cooling channel. The heat sink 41 can also be composed of multiple flat plates, and each flat plate is provided with a second water-cooling channel. In this case, the second water inlet 411 and the second water outlet 412 are respectively provided on the two flat plates at both ends of the heat sink 41, and for two adjacent flat plates, the water inlet end of the second water-cooling channel on one flat plate is connected to the water outlet end of the second water-cooling channel on the other flat plate. The second water inlet 411 is usually connected to an external cooling water source through a connecting pipe, and the second water outlet 412 is usually connected to an external cooling water recovery device or a cooling water circulation loop through a connecting pipe.

[0069] In this embodiment, cooling water can be introduced into the second water inlet 411 on the heat sink 41, allowing the cooling water to flow through the second water-cooling channel in the heat sink 41 and out of the second water outlet 412 to remove the heat transferred from the battery pack 2 to the heat sink 41, thereby enabling the second water cooling device 4 to dissipate heat and cool the side of the battery pack 2 facing away from the bottom plate 12. Moreover, the second water cooling device 4 has a simple structure and is easy to process and manufacture.

[0070] Optionally, as shown in FIG3 and FIG5 , the second water cooling device 4 further includes a second cooling pipeline 42 , and the second water inlet 411 and the second water outlet 412 are respectively connected to the first water cooling channel 31 through the second cooling pipeline 42 .

[0071] Specifically, when there are multiple first water-cooling channels 31, the second water inlet 411 and the second water outlet 412 are usually connected to two first water-cooling channels 31 among the multiple first water-cooling channels 31 through the second cooling pipe 42 respectively, that is, the second water inlet 411 is connected to one of the two first water-cooling channels 31 through the second cooling pipe 42, and the second water outlet 412 is connected to the other of the two first water-cooling channels 31 through the second cooling pipe 42, so that the two first water-cooling channels 31 are connected in series through the second water-cooling device 4, thereby realizing the series connection of the water-cooling channels of the first water-cooling device 3 and the second water-cooling device 4. When there are multiple groups of first water-cooling devices 3, the second water inlet 411 is usually connected to the first water-cooling channel 31 of the first group of first water-cooling devices 3 through the second cooling pipe 42, and the second water outlet 412 is connected to the first water-cooling channel 31 of the second group of first water-cooling devices 3 through the second cooling pipe 42. At this time, the first water outlet of the first cooling pipe 32 of the first group of first water-cooling devices 3 and the first water inlet of the first cooling pipe 32 of the second group of first water-cooling devices 3 can be blocked, so that the first group of first water-cooling devices 3 and the second group of first water-cooling devices 3 are connected in series through the second water-cooling device 4, thereby realizing the series connection of the water-cooling channels of the first water-cooling devices 3 and the second water-cooling devices 4.

[0072] In this embodiment, a second cooling pipe 42 is provided, and the second water inlet 411 and the second water outlet 412 are respectively connected to the first water-cooling channel 31 through the second cooling pipe 42, so as to realize the series connection of the water-cooling channels of the first water-cooling device 3 and the second water-cooling device 4. Moreover, it is possible to avoid connecting the cooling pipe to the second water inlet 411 and the second water outlet 412 by passing through the cover body 11, thereby reducing the operation of opening holes on the cover body 11. At the same time, there is no need to additionally configure the second water-cooling device 4 with a water inlet interface and a water outlet interface on the outside of the battery box 1, thereby simplifying the pipeline layout of the first water-cooling device 3 and the second water-cooling device 4.

[0073] Optionally, as shown in FIG. 8 , the second water inlet 411 and the second water outlet 412 are located on the same side.

[0074] In this embodiment, the second water inlet 411 and the second water outlet 412 are usually located on the side of the first cooling pipeline 32. In this way, the distance between the second water inlet 411 and the second water outlet 412 and the first cooling pipeline 32 can be shortened, thereby facilitating the layout of the pipeline.

[0075] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An integrated battery pack, characterized in that: include: A battery box (1) comprises a cover (11) and a bottom plate (12), wherein the cover (11) is connected to one side of the bottom plate (12); A battery pack (2) is arranged between the cover (11) and the bottom plate (12), and is connected to the bottom plate (12); A first water cooling device (3) is disposed on the bottom plate (12) and is used to cool a side of the battery pack (2) facing the bottom plate (12); The second water cooling device (4) is arranged on the side of the battery pack (2) facing away from the bottom plate (12), and is used to cool the side of the battery pack (2) facing away from the bottom plate (12).

2. The integrated battery pack according to claim 1, characterized in that: The first water cooling device (3) comprises a first water cooling channel (31), a first cooling pipeline (32) and a first blocking member (33); the first cooling pipeline (32) is provided with a first water inlet and a first water outlet, and the first cooling pipeline (32) is arranged on the base plate (12) and communicated with the first water cooling channel (31); the base plate (12) is provided with a through cavity penetrating the base plate (12) along the length direction of the base plate (12); the first water cooling channel (31) is arranged in the through cavity and penetrating the base plate (12) along the length direction of the base plate (12); the first blocking member (33) is used for blocking both ends of the first water cooling channel (31).

3. The integrated battery pack according to claim 2, characterized in that: The first cooling pipeline (32) is located outside the battery box (1).

4. The integrated battery pack according to claim 2, characterized in that: A plurality of the first water-cooling channels (31) are provided, and the plurality of the first water-cooling channels (31) are arranged at intervals and are respectively connected to the first cooling pipeline (32).

5. The integrated battery pack according to claim 2, characterized in that: The first water cooling device (3) is provided with a plurality of groups, the first water cooling channels (31) of the plurality of groups of the first water cooling device (3) are arranged side by side along the width direction of the base plate (12), and the first cooling pipelines (32) of the plurality of groups of the first water cooling device (3) are arranged side by side along the length direction of the base plate (12).

6. The integrated battery pack according to claim 2, characterized in that: The second water cooling device (4) comprises a heat sink (41) with a hollow structure, the internal space of the heat sink (41) forming a second water cooling channel, the second cold water channel extending along the length direction of the battery pack (2), and the heat sink (41) being provided with a second water inlet (411) and a second water outlet (412), the second water inlet (411) being connected to the second water outlet (412) through the second water cooling channel.

7. The integrated battery pack according to claim 6, characterized in that: The second water cooling device (4) further comprises a second cooling pipeline (42), and the second water inlet (411) and the second water outlet (412) are respectively connected to the first water cooling channel (31) through the second cooling pipeline (42).

8. The integrated battery pack according to claim 6, characterized in that: The second water inlet (411) and the second water outlet (412) are located on the same side of the heat dissipation plate (41).

9. The integrated battery pack according to claim 1, characterized in that: The bottom plate (12) comprises two first plate bodies (121) and at least one second plate body (122), wherein the second plate body (122) is arranged between the two first plate bodies (121), and one end of the first plate body (121) is used for connecting to the whole vehicle, and the other end is connected to the second plate body (122).

10. The integrated battery pack according to claim 1, characterized in that: The second water cooling device (4) is bonded to a side of the battery pack (2) facing away from the bottom plate (12), and / or the battery pack (2) is bonded to the bottom plate (12).

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