Battery pack and vehicle

Abstract

The application relates to the technical field of batteries, and provides a battery pack and a vehicle. According to the battery pack provided by the embodiment of the application, the liquid storage piece for storing the cooling medium and the box body of the battery pack are detachable in the water cooling mechanism of the battery pack, on the basis of which, the two liquid storage pieces are arranged on the opposite first side and second side of the box body, and the second communication pipe assembly connecting the two liquid storage pieces is arranged on the third side between the first side and the second side. Therefore, the two liquid storage pieces and the second communication pipe assembly are equivalent to being connected to the outer sides of the first side, the third side and the second side, so that a frame surrounding the outer sides of the first side, the third side and the second side is formed, and the connection tightness of the box body and the water cooling mechanism is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack and a vehicle. Background Technology

[0002] The energy storage battery of a new energy vehicle, also known as the power battery, is the heart of the vehicle. The power battery is composed of multiple cells arranged into modules and packaged together, along with key components such as the battery management system, and covered with a robust outer shell for protection. The discharge current of the power battery affects the overall operating status and performance of the electric vehicle.

[0003] Currently, the power batteries of new energy vehicles generally use thermal control systems to detect battery temperature. During the operation of the power battery, most of them use the airflow generated during the vehicle's movement to dissipate heat from the battery pack, and some also use water cooling systems for cooling. However, the fit between these battery packs and liquid cooling systems is generally not tight enough, which can easily cause the pipes of the liquid cooling system to shake during vehicle operation, and even lead to the risk of loosening or leakage. Summary of the Invention

[0004] In view of this, this application provides a battery pack and a vehicle, with the aim of solving the above-mentioned technical problems to a certain extent.

[0005] According to a first aspect of this application, a battery pack is provided, the battery pack comprising:

[0006] A battery module, wherein the battery module comprises multiple individual battery cells;

[0007] The battery module is housed within the housing.

[0008] The water-cooling mechanism includes multiple liquid storage components, a first connecting pipe assembly, and a second connecting pipe assembly. The liquid storage components are used to store cooling medium. Among the multiple liquid storage components, two liquid storage components are arranged opposite to each other. The two liquid storage components are detachably connected to the first side and the second side of the housing, respectively.

[0009] The first connecting pipe assembly connects the two liquid storage components, the second connecting pipe assembly connects the two liquid storage components, the first connecting pipe assembly passes through the box body, and the second connecting pipe assembly is disposed on the outside of the third side of the box body, the third side being located between the first side and the second side.

[0010] Based on the above technical solutions, optionally, the water cooling mechanism includes a positioning element, which is disposed on the third side, and the second connecting pipe assembly is connected to the positioning element.

[0011] Based on the above technical solutions, optionally, the second connecting pipe assembly includes multiple sets of second connecting pipes, each set of second connecting pipes including:

[0012] The first sub-tube is fixedly connected to the first of the two liquid storage components, and the first sub-tube is used to communicate with the first one.

[0013] The second sub-tube is fixedly connected to the second of the two liquid storage components, and is used to communicate with the second component. The second sub-tube is detachably connected to the first sub-tube.

[0014] Based on the above technical solutions, optionally, the water cooling mechanism further includes a sealing frame, which is disposed on the third side and has a sealing cavity. The first sub-tube and the second sub-tube are both inserted into the sealing cavity and are detachably connected to each other.

[0015] Based on the above technical solutions, optionally, the second connecting pipe has a hollow portion, a part of which is located in the first sub-pipe, and the other part of which is located in the second sub-pipe.

[0016] Based on the above technical solutions, optionally, the water cooling mechanism further includes a pump, a first manifold, and a second manifold. The first manifold is connected to and communicates with the first of the two liquid storage components, and the second manifold is connected to the second of the two liquid storage components.

[0017] The second manifold is connected to the pump, and the pump is connected to the second one;

[0018] The second connecting pipe group includes multiple sets of second connecting pipes, with each set of second connecting pipes having its two ends connected to the first manifold and the second manifold, respectively.

[0019] Based on the above technical solutions, the battery pack may optionally include a separator, which is disposed inside the housing and has multiple chambers, each chamber being used to accommodate one or more individual batteries;

[0020] The first connecting pipe assembly includes multiple sets of first connecting pipes, each set of first connecting pipes includes multiple first connecting pipes, each first connecting pipe includes a first branch pipe and a second branch pipe, the first branch pipe is fixedly connected to the first of the two liquid storage devices, and the second branch pipe is fixedly connected to the second of the two liquid storage devices.

[0021] The separator has multiple channels that correspond one-to-one with the multiple sets of first connecting pipes. The first branch pipe and the second branch pipe are inserted into the corresponding channels to form a connection.

[0022] Based on the above technical solutions, optionally, the separator includes a first grille extending along a first direction and a plurality of second grilles extending along a second direction, wherein the plurality of second grilles are arranged in a one-to-one correspondence with the plurality of sets of first connecting pipes.

[0023] Each of the second grids is provided with a set of channels, and each set of channels includes multiple channels, which are provided one-to-one with the multiple first connecting pipes.

[0024] Based on the above technical solutions, optionally, the number of liquid storage components is greater than two, the first side and the second side are opposite to each other in the second direction, and the plurality of liquid storage components also include at least one of the two sides of the housing in the first direction, and the liquid storage component at least one of the two sides of the housing in the first direction is detachably connected to the remaining liquid storage components.

[0025] According to a second aspect of the present application, a vehicle is provided, the vehicle including the battery pack described above.

[0026] Thus, in the battery pack provided according to the embodiments of this application, the liquid storage unit for storing the cooling medium in the water-cooling mechanism of the battery pack is detachable from the battery pack housing. Based on this, two liquid storage units are respectively arranged on opposite first and second sides of the housing, while a second connecting pipe assembly connecting these two liquid storage units is disposed on a third side between the first and second sides. Therefore, the aforementioned two liquid storage units and the second connecting pipe assembly are essentially connected together to the outside of the first, third, and second sides, thereby forming a frame enclosing the outside of the first, third, and second sides.

[0027] This frame not only connects to the housing on the side of each component, ensuring a tight connection between the water-cooling mechanism and the housing, but also forms a protective enclosure from the outside of the housing, protecting the battery pack's housing structure. More importantly, a first connecting pipe assembly, which transports the cooling medium from the liquid storage components to the interior space of the housing, passes through the housing and connects to the two opposing liquid storage components. This allows the aforementioned protective enclosure structure to be structurally closed by the first connecting pipe assembly, further enhancing the tightness of the connection between the water-cooling mechanism and the housing.

[0028] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram showing a three-dimensional view of a battery pack provided according to an embodiment of this application is shown.

[0031] Figure 2 A schematic diagram of another three-dimensional view of a battery pack provided according to an embodiment of this application is shown.

[0032] Figure 3 A schematic diagram showing a three-dimensional view of the internal structure of a battery pack provided according to an embodiment of this application is shown.

[0033] Figure 4 A schematic diagram showing a three-dimensional view of a portion of the structure of a battery pack according to an embodiment of this application is provided.

[0034] Figure 5 It shows Figure 4 A schematic diagram of the enlarged view at point A in the middle.

[0035] Figure 6 A schematic diagram of a three-dimensional water-cooling mechanism for a battery pack provided according to an embodiment of this application is shown.

[0036] Figure 7 A schematic diagram showing a three-dimensional view of a portion of the structure of the water-cooling mechanism of a battery pack according to an embodiment of this application is provided.

[0037] Figure 8 It shows Figure 7 A schematic diagram of the enlarged view at point B in the middle.

[0038] Figure 9 A schematic diagram of a sealing frame for a battery pack provided according to an embodiment of this application is shown. Detailed Implementation

[0039] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0043] According to a first aspect of the embodiments of this application, a battery pack is provided, which will be described below in conjunction with... Figures 1 to 9 Describe in detail the structure and working principle of the battery pack.

[0044] According to the embodiments of this application, the battery pack includes a battery module, a housing, and a water-cooling mechanism.

[0045] In this embodiment, the battery module includes multiple individual batteries and is disposed within a housing. The water-cooling mechanism includes multiple liquid storage components, a first connecting pipe assembly, and a second connecting pipe assembly. The liquid storage components are used to store cooling medium. Among the aforementioned multiple liquid storage components, two liquid storage components are disposed opposite to each other and are detachably connected to a first side and a second side of the housing, respectively.

[0046] In one embodiment, a first connecting pipe assembly connects two liquid storage units, a second connecting pipe assembly connects two liquid storage units, the first connecting pipe assembly passes through the housing, and the second connecting pipe assembly is located on the outside of the third side of the housing, with the third side located between the first side and the second side.

[0047] Thus, in the battery pack provided according to the embodiments of this application, the liquid storage unit for storing the cooling medium in the water-cooling mechanism of the battery pack is detachable from the battery pack housing. Based on this, two liquid storage units are respectively arranged on opposite first and second sides of the housing, while a second connecting pipe assembly connecting these two liquid storage units is disposed on a third side between the first and second sides. Therefore, the aforementioned two liquid storage units and the second connecting pipe assembly are essentially connected together to the outside of the first, third, and second sides, thereby forming a frame enclosing the outside of the first, third, and second sides.

[0048] This frame not only connects to the housing on the side of each component, ensuring a tight connection between the water-cooling mechanism and the housing, but also forms a protective enclosure from the outside of the housing, protecting the battery pack's housing structure. More importantly, a first connecting pipe assembly, which transports the cooling medium from the liquid storage components to the interior space of the housing, passes through the housing and connects to the two opposing liquid storage components. This allows the aforementioned protective enclosure structure to be structurally closed by the first connecting pipe assembly, further enhancing the tightness of the connection between the water-cooling mechanism and the housing.

[0049] The battery pack provided in the embodiments of this application essentially achieves three reuses of the water-cooling mechanism. Firstly, the water-cooling mechanism can construct a water-cooling cycle based on at least one energy storage component, a first connecting pipe assembly, another energy storage component, and a second connecting pipe assembly, thereby providing water cooling for the battery modules inside the battery pack housing. Secondly, the enclosing structure formed by the two opposing energy storage components and the second connecting pipe assembly provides physical protection to the housing from the outside. Thirdly, the connection between the two opposing energy storage components by the first connecting pipe assembly serves both to conduct the cooling medium through the water and to close the enclosing structure of the aforementioned three components, increasing the tightness of the connection between the water-cooling mechanism and the housing.

[0050] As an example, the battery pack casing described above can be, for instance, a cuboid structure with chamfered edges along its four height-extending edges, forming an octagonal structure. The first and second sides described above can be the two sides with the largest areas among the eight sides of the battery pack casing. The length direction of these two sides is the length direction of the casing, and the width direction of the two sides is the height direction of the casing. In this embodiment, the liquid reservoir can also be cuboid or approximately cuboid in shape, and its length can be slightly shorter than the length directions of the first and second sides.

[0051] According to the battery pack provided in the embodiments of this application, the water cooling mechanism may include a positioning member, which may be disposed on the third side, and the second connecting pipe assembly may be connected to the positioning member. Here, by providing a positioning member on the third side, the second connecting pipe assembly has a fixed positioning position on the third side, thereby reducing the complexity of installation.

[0052] In practical applications, the positioning element of the second connecting pipe assembly can have two parts, which can be arranged coaxially and both have through holes for the second connecting pipe assembly to pass through. The second connecting pipe assembly can have a protruding anti-torsion structure on the outside of the cylindrical tube, and one part of the positioning element can have a recess further provided on the wall of the through hole to cooperate with the anti-torsion structure, thereby preventing the second connecting pipe assembly from torturing as a whole. These specific related structures will be described in detail in the following specific embodiments.

[0053] According to the battery pack of the present application, the second connecting pipe assembly may include multiple sets of second connecting pipes, and each set of second connecting pipes may include a first sub-pipe and a second sub-pipe.

[0054] In one embodiment, a first sub-tube is fixedly connected to the first of two liquid storage devices and is used to communicate with the first device. A second sub-tube is fixedly connected to the second of the two liquid storage devices and is used to communicate with the second device. The second sub-tube is detachably connected to the first sub-tube.

[0055] Thus, according to the battery pack provided in the embodiments of this application, for a group of second connecting pipes, it is divided into two, and each sub-pipe is fixedly connected to the corresponding liquid storage component, thereby forming a module with the corresponding liquid storage component, which facilitates the modular splicing and installation of the water cooling mechanism.

[0056] According to the battery pack provided in the embodiments of this application, the water cooling mechanism may further include a sealing frame, which may be disposed on the third side. The sealing frame has a sealing cavity, into which both the first sub-tube and the second sub-tube are inserted. The first sub-tube and the second sub-tube are detachably connected to each other. Here, the sealing frame serves both to maintain the position of the first sub-tube and the second sub-tube and to seal the connection position of the first sub-tube and the second sub-tube.

[0057] According to the battery pack provided in the embodiments of this application, the second connecting pipe has a hollow portion, a part of which is located in the first sub-pipe and the other part of which is located in the second sub-pipe. Here, the hollow portion can be a hollow portion extending along the extension direction of each set of second connecting pipes, which is the width direction of the housing. The hollow portion can be a strip-shaped through hole opened on the second connecting pipe. Because of the presence of the hollow portion, the fluid in the first sub-pipe and the second sub-pipe will be split.

[0058] According to the battery pack provided in the embodiments of this application, taking the cooling medium flowing from the first sub-tube to the second sub-tube as an example, the cooling medium first splits, then merges before reaching the end of the first sub-tube, then flows into the second sub-tube at the junction of the first and second sub-tubes, then splits at the hollow part of the second sub-tube, and merges again after passing through this hollow part, and finally flows into the liquid storage device on the side where the second sub-tube is located.

[0059] In this embodiment, the presence of the hollow portion allows airflow to pass through it while the vehicle is in motion, thereby assisting in the air-cooling of the cooling medium passing through the second connecting pipe.

[0060] According to the battery pack provided in the embodiments of this application, the water cooling mechanism may further include a pump, a first manifold, and a second manifold. The first manifold may be connected to and communicate with the first of the two liquid storage containers, and the second manifold may be connected to the second of the two liquid storage containers. Further, the second manifold is communicated with the pump, and the pump is communicated with the second liquid storage container.

[0061] Thus, according to the battery pack provided in the embodiments of this application, the first manifold and the second manifold are set to realize the convergence of the cooling medium, so that the height of the liquid storage component is less than or equal to the height of the housing, thereby reducing unnecessary space occupation.

[0062] In an embodiment, the second connecting pipe group may include multiple sets of second connecting pipes, with each set of second connecting pipes having its two ends connected to the first manifold and the second manifold, respectively. That is, the first sub-pipe may be fixedly connected to the first manifold to be fixedly connected to a liquid storage device, and the second sub-pipe may be fixedly connected to the second manifold to be fixedly connected to another liquid storage device.

[0063] According to the battery pack provided in the embodiments of this application, the battery pack may further include a separator disposed in the housing. The separator may have multiple chambers, each of which may be used to accommodate one or more individual batteries.

[0064] In this embodiment, the first connecting pipe assembly may include multiple sets of first connecting pipes, each set of first connecting pipes may include multiple first connecting pipes, and each first connecting pipe may include a first branch pipe and a second branch pipe. The first branch pipe may be fixedly connected to the first of the two liquid storage containers, and the second branch pipe may be fixedly connected to the second of the two liquid storage containers. Here, the first connecting pipe is divided into two parts, and the different branch pipes are fixedly connected to different liquid storage containers as a whole. The connection and communication method of the second connecting pipe assembly described above can be referred to.

[0065] As a more effective cooling method for individual cells, the separator can have multiple sets of channels corresponding one-to-one with multiple sets of first connecting pipes. First and second branch pipes are inserted into their respective channels to form a connection. These channels, by directly participating in the separation of the individual cells, are closer to them, allowing the first and second branch pipes to cool the individual cells more efficiently. Simultaneously, the insertion of the first connecting pipes into the separator reuses the space already occupied by the separator, resulting in a more compact battery pack structure and improved energy density.

[0066] According to the battery pack provided in the embodiments of this application, the separator may include a first grille extending along a first direction (e.g., the length direction of the housing) and a plurality of second grilles extending along a second direction (e.g., the width direction of the housing), wherein the plurality of second grilles are provided in a one-to-one correspondence with the plurality of sets of first connecting pipes.

[0067] Furthermore, each second grid can be provided with a set of channels, and each set of channels can include multiple channels, and the aforementioned multiple channels can be provided one-to-one with multiple first connecting pipes.

[0068] According to the battery pack provided in the embodiments of this application, the number of liquid storage components can be greater than two. The first side and the second side are opposite to each other in the second direction. The plurality of liquid storage components also include a liquid storage component disposed on at least one of the two sides of the housing in the first direction. The liquid storage component disposed on at least one of the two sides of the housing in the first direction is detachably connected to the remaining liquid storage components.

[0069] In other words, at least one of the two opposite sides in the width direction of the housing is provided with other liquid storage components. For example, one of the two sides may have a liquid storage component, or both of the two sides may have a liquid storage component. Preferably, when all four sides of the housing have liquid storage components, the four liquid storage components can be fixedly connected and communicated by pipes extending along the outside of the housing. For example, a liquid storage component arranged along the length direction of the housing is connected to another liquid storage component adjacent to it to form a set of liquid storage components, and the other two liquid storage components are also connected in this way to form a set of liquid storage components. The cooling medium, such as coolant or water, flows from the first set of liquid storage components through the inside of the housing and then flows to the next set of liquid storage components. The four liquid storage components surrounding the housing, combined with the second connecting pipe assembly, form a box-like protective structure, which not only protects the housing but also makes the connection between the water cooling mechanism and the housing more secure.

[0070] Additionally, the water-cooling mechanism may include connectors, such as connecting beams, which can detachably (e.g., by screws) connect two opposing liquid reservoirs. That is, two sets of connecting beams connect two different opposing liquid reservoirs, and the two sets of connecting beams intersect. This allows the water-cooling mechanism to form a cage-like structure, completely protected by the outside of the battery pack housing.

[0071] The following specific implementation examples will describe in detail the installation method of the battery pack provided according to the embodiments of this application.

[0072] In this embodiment, the battery pack housing includes an outer frame 1, an upper sealing plate 2, and a lower support plate 3. The upper sealing plate 2 and the lower support plate 3 are respectively assembled on the upper and lower sides of the outer frame 1 by bolts, rivets, etc. A set of partitions, namely cell shelves 4, are fixedly assembled inside the outer frame 1 of the battery pack. Each grid on the cell shelf 4 is equipped with a cell module 5 (which can be a single cell as described above, or a module formed by multiple single cells electrically and mechanically connected).

[0073] In this embodiment, mounting slots 101 are provided at the four corners of both sides of the battery pack outer casing frame 1. A liquid storage component is placed on each side of the battery pack outer casing frame 1. The liquid storage component can be, for example, a heat dissipation water box 6. The heat dissipation water box 6 is assembled with the mounting slots 101 by mounting claws 7 at the four corners, and is fixedly assembled with bolts. A water pump module 8 is installed inside each heat dissipation water box 6. An array of heat dissipation thin pipes 9 are installed on the side of both heat dissipation water boxes 6 facing the battery pack outer casing frame 1. The heat dissipation thin pipes 9 are the first and second branch pipes as described above.

[0074] In this embodiment, numerous horizontally extending heat dissipation holes 102 are provided on both sides of the outer casing frame 1 of the battery pack and inside the cell shelf 4. The heat dissipation holes 102 are all connected front and back and keep the interior sealed. Two heat dissipation tubes 9 located on the same axis are inserted into the interior of the heat dissipation holes 102. The bottom of the heat dissipation water box 6 is equipped with a manifold 11 connected to the interior of the heat dissipation water box 6. On the side of the two manifold 11 (i.e. the first manifold and the second manifold) that are close to each other, multiple horizontally evenly distributed return water pipes 13 (i.e., the first sub-pipe and the second sub-pipe as described above) are installed. After the heat dissipation water boxes 6 on both sides are assembled, the two return water pipes 13 located on the same axis are connected to each other. The output end of the water pump module 8 is connected to the multiple return water pipes 13, and the input end of the water pump module 8 is connected to the interior of the heat dissipation water box 6.

[0075] According to the battery pack provided in the embodiment of this application, the bottom sides of the lower support plate 3 (that is, the bottom plate of the box) are equipped with positioning frames 14 with the same number as the return water pipes 13. Positioning grooves 1401 (i.e., positioning grooves 1401 with anti-torsion function) are opened on both sides of the positioning frame 14. Each return water pipe 13 is inserted into the interior of each positioning frame 14. Positioning sleeves 12 are fixedly sleeved on the tail end of the return water pipe 13. Each positioning sleeve 12 is inserted into the interior of each positioning frame 14.

[0076] According to the battery pack provided in the embodiments of this application, the bottom of the lower support plate 3 is equipped with two rows of reinforcing frames 15, the two rows of reinforcing frames 15 correspond to the positions of each positioning frame 14, and each return water pipe 13 is located inside each reinforcing frame 15.

[0077] According to the battery pack provided in the embodiment of this application, a row of sealing frames 16 is assembled at the bottom center of the lower support plate 3. Each sealing frame 16 has a sealing ring 17 installed inside. The two ends of the return water pipes 13 on both sides are provided with concentric circular slots 19 that fit together. The two concentric circular slots 19 actually form quick-connect connectors. The two are inserted and snapped together. A second sealing gasket ring 18 that fits against the sealing ring 17 is fitted on one end of the return water pipe 13 to ensure the sealing of the cooling medium.

[0078] According to the battery pack provided in the embodiments of this application, a sealing groove 103 can be provided at both ends of the heat dissipation through hole 102, and a first sealing gasket ring 10 adapted to the sealing groove 103 is fixedly sleeved at the tail end of each heat dissipation tube 9. In the battery pack provided in the embodiments of this application, a heat exchange air hole 1301 (that is, a hollow part) is provided on each of the return water pipes 13, and the side wall of the heat exchange air hole 1301 is sealed to the side wall of the return water pipe 13.

[0079] According to a second aspect of the embodiments of this application, a vehicle is provided, which includes the battery pack as described above and also includes the beneficial effects described above, which will not be repeated here.

[0080] The above are merely preferred embodiments of this application and do not limit the scope of protection of this application. Any equivalent structural transformations made based on the innovative concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A battery pack, characterized in that, The battery pack includes: A battery module, wherein the battery module comprises multiple individual battery cells; The battery module is housed within the housing. The water-cooling mechanism includes multiple liquid storage components, a first connecting pipe assembly, and a second connecting pipe assembly. The liquid storage components are used to store cooling medium. Among the multiple liquid storage components, two liquid storage components are arranged opposite to each other. The two liquid storage components are detachably connected to the first side and the second side of the housing, respectively. The first connecting pipe assembly connects the two liquid storage devices, the second connecting pipe assembly connects the two liquid storage devices, and the battery pack further includes a separator disposed in the housing. The separator has multiple chambers, each chamber being used to accommodate one or more individual batteries. The first connecting pipe assembly includes multiple sets of first connecting pipes, each set of first connecting pipes includes multiple first connecting pipes, each first connecting pipe includes a first branch pipe and a second branch pipe, the first branch pipe is fixedly connected to the first of the two liquid storage devices, and the second branch pipe is fixedly connected to the second of the two liquid storage devices. The separator has multiple sets of channels corresponding one-to-one with the multiple sets of first connecting pipes. The first branch pipe and the second branch pipe are inserted into the corresponding channels to form a connection. The second connecting pipe assembly is disposed on the outside of the third side of the housing, the third side being located between the first side and the second side.

2. The battery pack according to claim 1, characterized in that, The water-cooling mechanism includes a positioning element, which is disposed on the third side, and the second connecting pipe assembly is connected to the positioning element.

3. The battery pack according to claim 1, characterized in that, The second connecting pipe assembly includes multiple sets of second connecting pipes, each set of second connecting pipes including: The first sub-tube is fixedly connected to the first of the two liquid storage components, and the first sub-tube is used to communicate with the first one. The second sub-tube is fixedly connected to the second of the two liquid storage components, and is used to communicate with the second component. The second sub-tube is detachably connected to the first sub-tube.

4. The battery pack according to claim 3, characterized in that, The water cooling mechanism also includes a sealing frame disposed on the third side. The sealing frame has a sealing cavity, into which both the first sub-tube and the second sub-tube are inserted. The first sub-tube and the second sub-tube are detachably connected to each other.

5. The battery pack according to claim 3, characterized in that, The second connecting tube has a hollow portion, a part of which is located in the first sub-tube and another part of which is located in the second sub-tube.

6. The battery pack according to claim 1, characterized in that, The water-cooling mechanism further includes a pump, a first manifold, and a second manifold. The first manifold is connected to and communicates with the first of the two liquid storage devices, and the second manifold is connected to the second of the two liquid storage devices. The second manifold is connected to the pump, and the pump is connected to the second one; The second connecting pipe group includes multiple sets of second connecting pipes, with each set of second connecting pipes having its two ends connected to the first manifold and the second manifold, respectively.

7. The battery pack according to claim 1, characterized in that, The separator includes a first grid extending along a first direction and a plurality of second grids extending along a second direction, wherein the plurality of second grids are arranged in a one-to-one correspondence with the plurality of sets of first connecting pipes. Each of the second grids is provided with a set of channels, and each set of channels includes multiple channels, which are provided one-to-one with the multiple first connecting pipes.

8. The battery pack according to claim 1, characterized in that, The number of liquid storage components is greater than two, the first side and the second side are opposite to each other in the second direction, and the plurality of liquid storage components also include a liquid storage component disposed on at least one of the two sides of the housing in the first direction, and the liquid storage component disposed on at least one of the two sides of the housing in the first direction is detachably connected to the remaining liquid storage components.

9. A vehicle, characterized in that, The vehicle includes a battery pack as claimed in any one of claims 1 to 8.

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