Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack and electric equipment.The battery pack comprises a battery pack body, a cold plate set and a pipeline set, the battery pack body is provided with an interior and an exterior, the cold plate set comprises a first cold plate and a second cold plate, and the second cold plate is located in the battery pack body; the first cold plate extends out of the battery pack main body from the inside of the battery pack main body and forms a connecting end, at least part of the pipeline group is arranged outside the battery pack main body, and the pipeline group is communicated between the second cold plate and the connecting end. The battery pack can reduce the number of pipeline groups in the battery pack and simplify the structure of the pipeline groups, thereby achieving the effects of simplifying the structure, reducing the cost, reducing the reliability requirement and improving the capacity of the battery pack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and a power consumption device. BACKGROUND

[0002] The combined battery pack can meet the demand of large power and long endurance of the related power consumption device. A big difficulty in the design of the combined battery pack lies in the setting of the thermal management system.

[0003] At present, when the combined battery pack in the related art configures the thermal management system, in order to facilitate effective heat dissipation of each battery cell module, the thermal management system usually includes a plurality of cold plates arranged in the interior of the battery pack. The plurality of cold plates are connected through pipes in the interior of the battery pack. The pipes between the cold plates are located in the interior of the battery pack, so that the thermal management system has the defects of complex structure, high cost, high requirement for reliability, being not conducive to later maintenance, and low utilization rate of the interior space of the battery pack. UTILITY MODEL CONTENT

[0004] The present application provides a battery pack and a power consumption device, which can reduce the number of pipe groups in the battery pack and simplify the structure of the pipe groups.

[0005] The first aspect of the present application provides a battery pack, comprising:

[0006] a battery pack body having an interior and an exterior;

[0007] a cold plate group including a first cold plate and a second cold plate, the second cold plate being located in the interior of the battery pack body, the first cold plate extending from the interior of the battery pack body to the exterior and forming a connection end;

[0008] and a pipe group, at least part of the pipe group being arranged outside the battery pack body, the pipe group being connected between the second cold plate and the connection end.

[0009] According to the battery pack of the first aspect of the present application, the second cold plate can extend from the interior of the battery pack body. When the pipe group is configured for the cold plate group, at least part of the pipe group can be located outside the battery pack body, thereby reducing the number of pipe groups in the battery pack and simplifying the structure of the pipe groups. Based on this, on the one hand, the cost of the battery pack can be reduced, on the other hand, the reliability requirement of the battery pack can be reduced, and on the other hand, the utilization of the interior space of the battery pack by the battery cell module can be improved, thereby improving the capacity of the battery pack.

[0010] In a possible implementation manner, the cold plate group includes a plurality of first cold plates arranged in parallel and spaced apart, the first cold plates are parallel to the second cold plate, and the second cold plate is located above the first cold plates.

[0011] In a possible implementation, the cold plate group further comprises a third cold plate arranged above the second cold plate, the third cold plate comprising flat portions parallel to the first cold plate and bending avoiding portions connected between adjacent two flat portions.

[0012] In a possible implementation, the third cold plate further comprises a flow channel structure arranged on the flat portions and the bending avoiding portions.

[0013] In a possible implementation, the flow channel structure comprises a liquid inlet flow channel and a liquid return flow channel, the liquid inlet flow channel and the liquid return flow channel being in communication, one end of the liquid inlet flow channel forming a liquid inlet port, and one end of the liquid return flow channel forming a liquid outlet port.

[0014] In a possible implementation, the liquid inlet port and the liquid outlet port are located at the same end of the third cold plate.

[0015] In a possible implementation, the flow channel structure comprises a liquid inlet flow channel and a liquid return flow channel, the liquid inlet flow channel and the liquid return flow channel being separated, one end of the liquid inlet flow channel forming a liquid inlet port, the other end of the liquid inlet flow channel forming a first liquid outlet port, one end of the liquid return flow channel forming a liquid return port, and the other end of the liquid return flow channel forming a second liquid outlet port.

[0016] In a possible implementation, the liquid inlet port and the second liquid outlet port are located at one end of the third cold plate, and the first liquid outlet port and the liquid return port are located at the other end of the third cold plate.

[0017] In a possible implementation, the liquid inlet flow channel extends along the length direction of the flat portions and the bending avoiding portions, and the liquid return flow channel extends along the length direction of the flat portions and the bending avoiding portions.

[0018] In a possible implementation, the liquid inlet flow channel comprises a plurality of parallel arranged sub-liquid inlet flow channels, and the liquid return flow channel comprises a plurality of parallel arranged sub-liquid return flow channels.

[0019] In a possible implementation, the bending avoiding portion comprises a first avoiding portion, a second avoiding portion and a third avoiding portion, the second avoiding portion being arranged parallel to the flat portion, and the first avoiding portion and the third avoiding portion being connected between the flat portion and the first avoiding portion.

[0020] In one possible implementation, the cold plate assembly further includes a third cold plate disposed above the second cold plate. The third cold plate includes an inlet channel and a return channel, which are separated. One end of the inlet channel forms an inlet, and the other end forms a first outlet. One end of the return channel forms a return outlet, and the other end forms a second outlet. The inlet and the second outlet are located at one end of the third cold plate, and the first outlet and the return outlet are located at the other end of the third cold plate.

[0021] In one possible implementation, the first cold plate includes a first inlet and a first outlet, the first inlet and the first outlet of the first cold plate being located at a first end of the cold plate assembly; the second cold plate includes a second inlet and a second outlet, the second inlet and the second outlet of the second cold plate being located at a first end of the cold plate assembly; the first liquid outlet and the liquid return outlet are located at a first end of the cold plate assembly; the liquid inlet and the second liquid outlet are located at a second end of the cold plate assembly; and the pipe assembly is used to connect the first liquid outlet, the first inlet and the second inlet, as well as to connect the liquid return outlet, the first outlet and the second outlet.

[0022] In one possible implementation, the pipeline assembly includes:

[0023] A liquid inlet pipeline assembly, wherein the liquid inlet pipeline assembly is connected between the first liquid outlet and the first inlet and the second inlet;

[0024] And a liquid outlet pipeline assembly, which is connected between the first outlet, the second outlet and the return port.

[0025] In one possible implementation, the inlet pipe assembly includes at least one inlet connection inlet and an inlet connection outlet adapted to the total number of the first inlet and the second inlet, wherein the inlet connection inlet is connected to the first outlet and the inlet connection outlet is connected to the first inlet and the second inlet.

[0026] In one possible implementation, the liquid inlet pipe assembly includes a first liquid inlet pipe, a second liquid inlet pipe, and a connecting joint. The first liquid inlet pipe is connected to the first liquid outlet and is located inside the assembly. The first liquid inlet pipe is connected to the second liquid inlet pipe via the connecting joint. The second liquid inlet pipe is located outside the assembly and is connected to the first inlet and the second inlet.

[0027] In one possible implementation, the first inlet pipe includes a plurality of inlet branch pipes, at least one of the inlet branch pipes is connected to the first outlet, at least one of the inlet branch pipes is connected to the second inlet, at least one of the inlet branch pipes is connected to the second inlet pipe through the connecting joint, and the first inlet is disposed on the connecting end.

[0028] In one possible implementation, the liquid outlet pipeline assembly includes at least one liquid outlet connection inlet and a number of liquid outlet connections adapted to the total number of the first outlet and the second outlet, wherein the liquid outlet connection inlet is connected to the return port, and the liquid outlet connection outlet is connected to the first outlet and the second outlet.

[0029] In one possible implementation, the liquid outlet pipeline assembly includes a first liquid outlet pipeline, a second liquid outlet pipeline, and a connecting joint. The first liquid outlet pipeline is connected to the return port and located inside the port. The first liquid outlet pipeline is connected to the second liquid outlet pipeline via the connecting joint. The second liquid outlet pipeline is located outside the port and is connected to the first outlet and the second outlet.

[0030] In one possible implementation, the first outlet pipe includes a plurality of outlet branches, at least one of the outlet branches is connected to the return port, at least one of the outlet branches is connected to the second outlet, at least one of the outlet branches is connected to the second outlet pipe through the connecting joint, and the first outlet is disposed on the connecting end.

[0031] In one possible implementation, the battery pack body includes:

[0032] The first main body includes a first housing and a first module disposed corresponding to the first cold plate. The first cold plate and the first module are located inside the first housing. The first cold plate extends out of the first housing. One end of the first housing is formed with an end receiving cavity, and at least a portion of the pipe assembly is received in the end receiving cavity.

[0033] The second body is disposed on the first body. The second body includes a second housing and a second module disposed corresponding to the second cold plate. The second cold plate and the second module are located inside the second housing.

[0034] In one possible implementation, a third cold plate is also included, which is disposed corresponding to the second module and located above the second cold plate.

[0035] In one possible implementation, the first body includes a plurality of first housings stacked from bottom to top, the pipe group includes a first pipe group, a second pipe group and a connecting joint, the first pipe group communicates between the third cold plate and the first cold plate adjacent to the third cold plate, the connecting joint is disposed on the first housing near the second housing, the second pipe group communicates to the first pipe group through the connecting joint, and the second pipe group is received in the end receiving cavity.

[0036] In one possible implementation, the second pipe assembly is connected to a connection end on the first cold plate.

[0037] In one possible implementation, the first housing is formed with a water storage tank around the location of the connecting joint.

[0038] In one possible implementation, two adjacent end-receiving cavities are connected.

[0039] In one possible implementation, the battery pack further includes:

[0040] The cap is sealed to the first housing.

[0041] A second aspect of this application provides an electrical device including the aforementioned battery pack. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 An exploded schematic diagram of a battery pack according to an embodiment of this application is shown;

[0044] Figure 2 A schematic diagram of the left side of a battery pack according to an embodiment of this application is shown;

[0045] Figure 3 A schematic diagram of the structure of a first housing provided according to an embodiment of this application is shown;

[0046] Figure 4 A schematic diagram of a cold plate assembly and a pipe assembly provided according to an embodiment of this application is shown.

[0047] Figure label:

[0048] 100-Cold plate assembly; 110-Straight section; 120-Bending avoidance section; 130-Flow channel structure; 121-Avoidance opening; 122-First avoidance section; 123-Second avoidance section; 124-Third avoidance section; 131-Liquid inlet flow channel; 132-Liquid return flow channel; 1321-Liquid outlet;

[0049] 200 - Pipe assembly; 210 - Inlet pipe assembly; 220 - Outlet pipe assembly; 230 - Pipe fitting; 240 - Diverter fitting; 210a - Inlet connection; 210b - Inlet connection; 220a - Outlet connection; 220b - Outlet connection; 211 - First inlet pipe; 212 - Second inlet pipe; 221 - First outlet pipe; 222 - Second outlet pipe; 2111 - Inlet branch pipe; 2211 - Outlet branch pipe;

[0050] 10-Battery pack body; 10a-Internal receiving cavity; 11-First body; 12-Second body; 11a-First shell; 11b-First module; 11c-Pull plate; 12a-Avoidance area; 12b-Second shell; 12c-Second module; 11a1-End receiving cavity; 11a2-Water tank; 12a1-First groove; 12a2-Second groove; 12a3-Third groove;

[0051] 21-First cold plate; 22-Second cold plate; 23-Third cold plate; 24-First pipe assembly; 25-Second pipe assembly; 26-Connecting joint; 21a-First inlet; 21b-First outlet; 21c-Connecting end; 22a-Second inlet; 22b-Second outlet; 23a-Liquid inlet; 23b-First liquid outlet; 23c-Liquid return port; 23d-Second liquid outlet;

[0052] 30 - Cap. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. 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.

[0054] A modular battery pack is a combination structure of battery packs that can increase the battery pack's capacity. A modular battery pack can typically include two or three battery packs, and of course, it can also include more battery packs. By stacking two, three, or more battery packs, a battery pack with a larger capacity can be formed.

[0055] The operating temperature range of a battery pack plays a crucial role in its lifespan, cycle performance, and safety. As a component of the battery pack used to regulate its temperature, the thermal management system is an indispensable part of the battery pack design process.

[0056] For a single battery pack, the primary task of the thermal management system is to regulate the temperature of the cell modules within the pack. For example, during charge-discharge cycles, the temperature of the cell modules changes. The thermal management system dissipates the heat generated by the cell modules through the flow of refrigerant in the cold plate, thereby cooling the cell modules. When configuring a cold plate for a single battery pack, the cell modules can be placed on one side of the cold plate, and the cold plate should cover as much of the area where the cell modules are located as possible.

[0057] For modular battery packs, multiple battery packs are typically stacked, and the cell modules within the pack are also arranged in layers. When configuring cold plates for modular battery packs, multiple cold plates are usually positioned corresponding to cell modules; for example, one cell module is matched with one cold plate, resulting in multiple cold plates being distributed throughout the battery pack. Furthermore, for some irregularly shaped modular battery packs, cell modules may even be segmented within the same layer. For instance, to avoid vehicle longitudinal beams, some battery packs may isolate cell modules on the same layer, with the space between the cell modules used to pass through the vehicle's longitudinal beams. For these types of battery packs, the number of cold plates increases further, and the dispersion of cold plates becomes even more pronounced.

[0058] To facilitate effective heat dissipation for each cell module, the thermal management system typically includes multiple cold plates located inside the battery pack. These cold plates are connected by pipes inside the battery pack, and the pipes between the cold plates are located inside the battery pack. This results in a thermal management system that is complex in structure, expensive, requires high reliability, is not conducive to later maintenance, and has low utilization of the internal space of the battery pack.

[0059] In view of the above-mentioned situation and problems, this application provides a battery pack, which can be a modular battery pack. This battery pack can be applied to electrical equipment such as new energy vehicles. This battery pack can transfer at least some of the pipes to the outside of the battery pack, which can reduce the number of pipes in the battery pack and simplify the pipe structure, reduce the reliability requirements of the battery pack, and facilitate later maintenance.

[0060] As can be seen from the following embodiments, the battery pack in the embodiments of this application can be an irregularly shaped battery pack, which can avoid related structures while ensuring heat dissipation performance. For example, it can avoid the vehicle longitudinal beams, thereby making full use of the space between the vehicle longitudinal beams.

[0061] To address this, the battery pack is equipped with a cold plate with an irregular structure, such as the third cold plate in the following embodiment. This third cold plate can provide heat dissipation for multiple isolated cell modules. That is, multiple isolated cell modules can be arranged together on one side of the third cold plate. The third cold plate adopts a continuous design with a space-avoidance function, which can reduce the number of cold plates and connection structures in the battery pack. Based on the reduction in the number of third cold plates and connection structures, the number of connection structures in the battery pack can be further reduced. On the one hand, this simplifies the structure and reduces costs. On the other hand, as the number of third cold plates and connection structures decreases, the number of connection structures will also decrease accordingly, thereby reducing the reliability requirements of the battery pack. Furthermore, the reduction in the number of third cold plates and connection structures also helps to improve the utilization of the internal space of the battery pack by the cell modules, thereby increasing the capacity of the battery pack.

[0062] In addition, to facilitate the use of the third cold plate, the battery pack is also equipped with a sealing cover, which can also avoid obstructing the vehicle's longitudinal beams.

[0063] Figure 1 An exploded schematic diagram of a battery pack according to an embodiment of this application is shown; Figure 2 A schematic diagram of the left side of a battery pack provided according to an embodiment of this application is shown.

[0064] In the embodiments of this application, please refer to Figures 1 to 4 The battery pack includes a battery pack body 10, a cold plate assembly 100, and a pipe assembly 200. The battery pack body has an interior and an exterior. The cold plate assembly 100 includes a first cold plate 21 and a second cold plate 22. The second cold plate 22 is located inside the battery pack body 10, and the first cold plate 21 extends from the interior of the battery pack body 10 to the exterior, forming a connection end 21c. At least a portion of the pipe assembly 200 is disposed outside the battery pack body 10, and the pipe assembly 200 connects the second cold plate 22 and the connection end 21c.

[0065] In this embodiment, the second cold plate 22 can extend from the inside of the battery pack body 10. When configuring the pipe group 200 for the cold plate group 100, at least a portion of the pipe group 200 can be located outside the battery pack body 10, thereby reducing the number of pipe groups 200 in the battery pack and simplifying the structure of the pipe group 200. Based on this, on the one hand, it can reduce the cost of the battery pack, on the other hand, it can reduce the reliability requirements of the battery pack, and on the other hand, it is also conducive to improving the utilization of the internal space of the battery pack by the cell module, thereby increasing the capacity of the battery pack.

[0066] In the embodiments of this application, please refer to Figure 1 and Figure 2The battery pack includes a battery pack body 10, which can be divided into a first body 11 and a second body 12. The number of the first body 11 and the second body 12 can be set according to actual needs, and the number of the first body 11 and the second body 12 is not less than one.

[0067] For ease of description and classification, the first main body 11 in this embodiment can be a structurally regular battery pack, for example, the first main body 11 can be a cuboid structure, and the second main body 12 is an irregularly shaped battery pack that needs to avoid related structures, for example, the second main body 12 is designed with a clearance area 12a for avoiding vehicle longitudinal beams, etc. The battery pack composed of the first main body 11 and the second main body 12 constitutes an irregularly shaped combined battery pack. Of course, in other embodiments, the second main body 12 can also adopt a regular structural form.

[0068] In some embodiments, the first body 11 includes a first housing 11a and a first module 11b corresponding to the first cold plate 21. The first cold plate 21 and the first module 11b are located inside the first housing 11a. The first cold plate 21 extends out from the first housing 11a. One end of the first housing 11a is formed with an end receiving cavity 11a1, and at least a portion of the pipe assembly 200 is received in the end receiving cavity 11a1.

[0069] The end receiving cavity 11a1 here can accommodate the pipe assembly 200 located outside the battery pack, so that this part of the pipe assembly 200 can be arranged in an orderly manner outside the battery pack.

[0070] The first module 11b can be positioned above the first cold plate 21. Of course, in other configurations, the first module 11b can also be positioned below the first cold plate 21.

[0071] In some embodiments, the second body 12 is disposed on the first body 11. The second body 12 includes a second housing 12a and a second module 12c disposed corresponding to the second cold plate 22. The second cold plate 22 and the second module 12c are located inside the second housing 12a.

[0072] The second module 12c can be positioned above the second cold plate 22. Of course, in other configurations, the second module 12c can also be positioned below the second cold plate 22.

[0073] To accommodate the first main body 11 and the second main body 12 mentioned above, the cold plate assembly 100 mainly includes a first cold plate 21 and a second cold plate 22 (see reference). Figure 4 The first cold plate 21 can be designed to follow the structure of the first main body 11. For example, the first cold plate 21 is rectangular. The second cold plate 22 can be designed according to the structure of the second main body 12. The second cold plate 22 can also be rectangular.

[0074] In addition, the cold plate assembly 100 may also include a third cold plate 23, which has an irregular structure, for example, the third cold plate 23 is formed with a first groove 12a1 that can avoid the vehicle longitudinal beam.

[0075] In the above embodiments, the first cold plate 21 is disposed in the first body 11. Generally speaking, the first cold plate 21 can be disposed at the bottom of the first body 11. The second cold plate 22 is disposed in the second body 12. Generally speaking, the second cold plate 22 can be disposed at the bottom of the second body 12.

[0076] When a third cold plate 23 is provided, the third cold plate 23 can be set to correspond to the second module 12c and located above the second cold plate 22.

[0077] To clearly understand the directional descriptions in the embodiments of this application, please refer to... Figure 1 A coordinate system is used, where the X-direction is the length direction of the battery pack, the Y-direction is the width direction of the battery pack, and the Z-direction is the thickness direction of the battery pack. Furthermore, the X-direction defines "right," the opposite direction of the X-direction defines "left," the Z-direction defines "top," the opposite direction of the Z-direction defines "bottom," the Y-direction defines "front," and the opposite direction of the Y-direction defines "back." The features containing directional terms described in the following embodiments can be combined with... Figure 1 To understand.

[0078] It is understood that in the above embodiments, for the battery pack, since the first cold plate 21 is located at the bottom of the first main body 11, the second cold plate 22 is located at the bottom of the second main body 12, and the third cold plate 23 is located above the second cold plate 22, each cell module (the first module 11b and the second module 12c) can be sandwiched between the two cold plates. For each cell module, there are cold plates at both the top and bottom, which can improve the heat dissipation effect of the battery pack.

[0079] In this embodiment, when the battery pack is equipped with a third cold plate 23, the third cold plate 23 adopts a continuous design with a space-avoiding function, which can reduce the number of cold plates and the number of connection structures in the battery pack, thereby simplifying the structure, reducing costs, reducing reliability requirements, and increasing the battery pack capacity.

[0080] In some embodiments, both the first housing 11a and the first module 11b can adopt a cuboid structure. The first housing 11a can be made of aluminum or the like, and the first module 11b can be formed by arranging multiple battery cells, with adjacent battery cells connected by connecting pieces.

[0081] In addition, to improve the heat dissipation capacity of the first module 11b and prevent heat diffusion, a cooling gel or similar material can be placed between two adjacent battery cells. To provide sufficient restraint force to the first module 11b, a pull plate or similar structure can also be provided on one side of the first module 11b.

[0082] In some embodiments, please refer to Figure 1 Both the second housing 12b and the second module 12c can adopt a cuboid structure. The second housing 12b can be made of aluminum or the like. The second module 12c can be formed by arranging multiple battery cells. Other structures of the second module 12c can be designed with reference to the first module 11b.

[0083] As described above, the first cold plate 21 can be set at the bottom of the first housing 11a, and the second cold plate 22 can be set at the bottom of the second housing 12a, so that the overall structure of the battery pack presents an alternating structure of cold plates and modules from bottom to top, and the first module 11b or the second module 12c is sandwiched between the cold plates.

[0084] For battery packs that need to avoid the vehicle's longitudinal beams, the second body 12 is typically positioned at the top of the battery pack, for example, in... Figure 1 In the example shown, the second body 12 is located on top of the first body 11, wherein, Figure 1 In the middle, the number of second subject 12 is one, and the number of first subject 11 is two. It can be understood that the number of first subject 11 can also be one or more.

[0085] exist Figure 1 In the example shown, for the second main body 12, in order to avoid the vehicle longitudinal beam, the second module 12c needs to be designed as multiple and spaced apart, and the first groove 12a1 is formed between two adjacent second modules 12c.

[0086] Furthermore, to simplify the battery pack structure, the first cold plate 21 can be integrated into the first housing 11a. For example, the first housing 11a can adopt a frame structure with openings on both sides, and the first cold plate 21 can be connected to one side of the frame structure. In this case, for the battery pack, with... Figure 1 Taking the example shown, apart from the first housing 11a and the second housing 12b, the overall structure of the battery pack is arranged from bottom to top as follows: first cold plate 21 - first module 11b - first cold plate 21 - first module 11b - second cold plate 22 - second module 12c - third cold plate 23.

[0087] For ease of understanding and description, the following embodiments will be based on... Figure 1The example shown is used for illustration. It can be understood that in other embodiments, the arrangement and number of the first body 11 and the second body 12 can also be changed.

[0088] Regarding the above arrangement, it is understandable that cooling plates are provided on both sides of the first module 11b, thereby improving the heat dissipation effect of the first module 11b. For the second module 12c, the heat dissipation effect can also be improved by the setting of the third cooling plate 23.

[0089] To accommodate the spaced arrangement of the second modules 12c, the third cold plate 23 may include a bending clearance portion 120, which forms the aforementioned second groove 12a2. The bending clearance portion 120 can be accommodated between two adjacent second modules 12c. For the specific structure of the third cold plate 23, please refer to the following embodiments.

[0090] In some embodiments, please refer to Figure 1 The second housing 12b can be embedded within the first housing 11a. For example, an embedded groove can be provided on the top inner side of the first housing 11a, and then the second housing 12b can be placed in the embedded groove.

[0091] In some embodiments, to avoid the vehicle's longitudinal beams, please refer to... Figure 3 The battery pack may also include a cover 30, which has a third groove 12a3 formed corresponding to the first groove 12a1, so that the cover 30 can be sealed to the first housing 11a.

[0092] Thus, for the second main body 12, the first groove 12a1, the second groove 12a2 and the third groove 12a3 are correspondingly set and form the avoidance area 12a mentioned above, through which the vehicle longitudinal beam can pass.

[0093] The seal between the first body 11 and the second body 12 can be achieved by connecting the cover 30 and the first housing 11a, for example, by providing a sealing ring between them. For two adjacent first bodies 11, the seal can be achieved by connecting the two first housings 11a, for example, by providing a sealing ring or fastener between them.

[0094] Figures 1 to 3 A schematic diagram of the structure of a first housing provided according to an embodiment of this application is shown.

[0095] In some embodiments, please refer to Figure 2 The first housing 11a has an end receiving cavity 11a1 formed at its end, and at least a portion of the pipe assembly 200 is received in the end receiving cavity 11a1.

[0096] Understandably, the function of the pipe assembly 200 is to connect the various cold plates.

[0097] By housing a portion of the pipeline in the end housing cavity 11a1, a portion of the pipeline assembly 200 is located outside the internal space of the battery pack, which helps to save internal space of the battery pack and increases the capacity of the battery pack.

[0098] In some embodiments, please refer to Figure 3 and Figures 1 to 3 The two adjacent end cavities 11a1 are connected, thereby expanding the space for housing the pipe assembly 200 and further increasing the capacity of the battery pack.

[0099] exist Figures 1 to 3 In the example shown, the end receiving cavity 11a1 is located on the left side of the battery pack. The end receiving cavities 11a1 in the two first bodies 11 located below are connected. The relevant structures of the pipe assembly 200 that need to be connected to the first cold plate 21 in the first body 11 can be accommodated in the end receiving cavity 11a1. The specific structural composition and arrangement of the pipe assembly 200 can be referred to the following embodiments related to the pipe assembly 200.

[0100] In some embodiments, please refer to Figure 4 The first main body 11 includes a plurality of first housings 11a stacked from bottom to top. The pipe assembly 200 includes a first pipe assembly 23, a second pipe assembly 25, and a connecting joint 26. The first pipe assembly 23 is connected between the third cold plate 23 and the first cold plate 21 adjacent to the third cold plate 23. The connecting joint 26 is disposed on the first housing 11a near the second housing 12b. The second pipe assembly 25 is connected to the first pipe assembly 23 through the connecting joint 26. The second pipe assembly 25 is housed in the end receiving cavity 11a1.

[0101] The pipe assembly 200 is divided into three components: a first pipe assembly 24, a second pipe assembly 25, and a connecting joint 26. In the embodiment where the third cold plate 23 is located at the top, refrigerant can be introduced into the entire pipe assembly 200 through the third cold plate 23. The first pipe assembly 24 can receive refrigerant from the third cold plate 23 and transfer it to the second cold plate 22 located below the third cold plate 23. Then, the refrigerant is transferred to the other first cold plates 21 through the connecting joint 26 and the second pipe assembly 25.

[0102] As described above, the second housing 12b can be embedded into the first housing 11a. In this case, an internal receiving cavity 10a can be formed at the outer end of the second housing 12b. The cover 30 can seal the internal receiving cavity 10a. The first pipe group 24 can be arranged using the space of the internal receiving cavity 10a, and the second pipe group 25 can be set in the end receiving cavity 11a1. This arrangement of the first pipe group 24 and the second pipe group 25 can make full use of the space of the battery pack, moving from the inside of the battery pack to the outside of the battery pack. This simplifies the structure of the pipe group 200 and reduces the number of pipe groups 200, making the battery pack more compact in structure and improving the capacity of the battery pack.

[0103] It should be noted that, in other embodiments, an end receiving cavity 11a1 may also be formed at the end of the second housing 12b to allow the entire pipe assembly 200 to be disposed outside the internal space of the battery pack. In other embodiments, for example, when the internal space of the battery pack is sufficient, the end receiving cavity 11a1 may not be provided, and the pipe assembly 200 may be disposed inside the internal space of the battery pack.

[0104] Figure 4 A schematic diagram of a cold plate assembly and a pipe assembly provided according to an embodiment of this application is shown.

[0105] In some embodiments, please refer to Figures 1 to 3 As described above, the cold plate assembly 100 includes a first cold plate 21 and a second cold plate 22. In some embodiments, the cold plate assembly 100 may also include a third cold plate 23, which has a novel structure and adopts a continuous design with a clearance function. The pipe assembly 200 is configured to connect the respective first cold plate 21, second cold plate 22 and third cold plate 23 in the cold plate assembly 100.

[0106] Because the third cold plate 23 in the cold plate assembly 100 adopts a continuous design with a space-avoiding function, the number of cold plates and connection structures in the battery pack can be reduced. Based on the reduction in the number of cold plates and connection structures, on the one hand, it can simplify the structure and reduce costs. On the other hand, as the number of cold plates and connection structures is reduced, the number of connection structures will also be reduced accordingly, thereby reducing the reliability requirements of the battery pack. Furthermore, the reduction in the number of cold plates and connection structures is also conducive to improving the utilization of the internal space of the battery pack by the cell modules, thereby increasing the capacity of the battery pack.

[0107] In some embodiments, please refer to Figure 4 The pipe assembly 200 can be located at one end of the cold plate assembly 100. In other words, the pipe assembly 200 can be located on one side of the battery pack, for example, on the left side of the battery pack.

[0108] Therefore, the battery pack can centrally set the pipe group 200 on one side of each cold plate structure, which can simplify the structure and control cost of the battery pack, reduce the reliability requirements, and facilitate later maintenance.

[0109] In some embodiments, please refer to Figure 4 The cold plate assembly 100 includes a plurality of parallel and spaced first cold plates 21, the first cold plates 21 being parallel to the second cold plates 22, and the second cold plates 22 being located above the first cold plates 21.

[0110] by Figure 2 For example, the cold plate group 100 includes two first cold plates 21, one second cold plate 22 and one third cold plate 23. The third cold plate 23 is located above the first cold plate 21. The two first cold plates 21 correspond to the two first bodies 11 in the battery pack body 10, and the one second cold plate 22 and the one third cold plate 23 correspond to the second body 112.

[0111] By setting the cold plates in the cold plate assembly 100 to be in a parallel state, it can better fit the battery pack for heat dissipation and is also beneficial to the overall assembly and design of the battery pack.

[0112] In some embodiments, please refer to Figure 4 and Figure 2 The first cold plate 21 includes a first inlet 21a and a first outlet 21b. The first inlets 21a and first outlets 21b of the multiple first cold plates 21 are located at the first end of the cold plate group 100. The second cold plate 22 includes a second inlet 22a and a second outlet 22b. The second inlet 22a and second outlet 22b of the second cold plate 22 are located at the first end of the cold plate group 100. The third cold plate includes an inlet channel 131 and a return channel 132, which are separated. One end of the inlet channel 131 forms an inlet 23a, and the other end forms a first outlet 23b. The return channel 132... One end of the return liquid channel 132 forms a return liquid port 23c, and the other end of the return liquid channel 132 forms a second liquid outlet 23d. The inlet 23a and the second outlet 23d are located at one end of the third cold plate 23, the first outlet 23b and the return liquid port 23c are located at the other end of the third cold plate 23, the first outlet 23b and the return liquid port 23c are located at the first end of the cold plate group 100, the inlet 23a and the second outlet 23d are located at the second end of the cold plate group 100, and the pipe group 200 is used to connect the first outlet 23b, the first inlet 21a and the second inlet 22a, as well as to connect the return liquid port 23c, the first outlet 21b and the second outlet 22b.

[0113] For a single first cold plate 21, refrigerant can enter the first cold plate 21 through the first inlet 21a and then flow out of the first cold plate 21 through the first outlet 21b. For a single second cold plate 22, refrigerant can enter the second cold plate 22 through the second inlet 22a and then flow out of the second cold plate 22 through the second outlet 22b. For the third cold plate 23, refrigerant can flow into the third cold plate 23 through the liquid inlet 23a and then flow out of the third cold plate 23 through the liquid outlet 23d. During the flow of refrigerant, refrigerant can flow into the second cold plate 22 and the first cold plate 21 through the first liquid outlet 23b, and the refrigerant in the first cold plate 21 and the second cold plate 22 can flow back into the third cold plate 23 through the liquid return port 23c.

[0114] Regarding the overall structure of the cold plate assembly 100, the liquid inlet 23a and the second liquid outlet 23d are located at the second end, which can be understood as the right end of the battery pack. The refrigerant can flow into the cold plate assembly 100 from the liquid inlet 23a and can also flow out of the cold plate assembly 100 from the second liquid outlet 23d. The first inlet 21a and the first outlet 21b of the first cold plate 21, the second inlet 22a and the second outlet 22b of the second cold plate, and the first outlet 23b and the return port 23c of the third cold plate 23 are all located at the first end, providing a basis for the pipe assembly 200 to be located at one end of the cold plate assembly 100. By setting the cold plate assembly 100 at this end, the connection between the various cold plates can be achieved.

[0115] In some embodiments, please refer to Figure 4 and Figure 2 The pipeline assembly 200 includes an inlet pipeline assembly 210 and an outlet pipeline assembly 220. The inlet pipeline assembly 210 is connected between the first outlet 23b and the first inlet 21a and the second inlet 22a, so that the refrigerant can flow from the first outlet 23b into each of the first cold plates 21 and the second cold plates 22. The outlet pipeline assembly 220 is connected between the first outlet 21b, the second outlet 22b and the return outlet 23c, so that the refrigerant can flow back from each of the first outlet 21b and the second outlet 22b to the third cold plate 23.

[0116] In some embodiments, please refer to Figure 4 and Figure 4 The liquid inlet pipeline assembly 210 includes at least one liquid inlet connection inlet 210a and a liquid inlet connection outlet 210b adapted to the total number of the first inlet 21a and the second inlet 22a. The liquid inlet connection inlet 210a is connected to the first liquid outlet 23b, and the liquid inlet connection outlet 210b is connected to the first inlet 21a and the second inlet 22a.

[0117] It is understood that the liquid inlet connection 210a needs to be connected to the aforementioned first liquid outlet 23b. The number of liquid inlet connection 210a is not limited. The number of liquid inlet connection 210a can be the same as the number of first liquid outlet 23b, and the two are in a one-to-one matching relationship. Of course, in other embodiments, multiple liquid inlet connection 210a can be connected to one first liquid outlet 23b. This application does not impose any special restrictions on the first liquid outlet 23b, the liquid inlet connection 210a, or the relationship between the two in terms of quantity.

[0118] The liquid inlet connection outlet 210b needs to be connected to the first inlet 21a and the second inlet 22a. Generally speaking, the first cold plate 21 can be provided with a first inlet 21a and the second cold plate 22 can be provided with a second inlet 22a. Therefore, the number of liquid inlet connection outlets 210b can be the same as the sum of the number of the first cold plate 21 and the second cold plate 22.

[0119] At this point, the refrigerant in the third cold plate 23 can sequentially pass through the first liquid outlet 23b, the liquid inlet connection inlet 210a, and the liquid inlet connection outlet 210b and enter the first cold plate 21 and the second cold plate 22.

[0120] To accommodate the aforementioned installation method that does not occupy the internal space of the battery pack, the liquid inlet pipe assembly 210 may include a first liquid inlet pipe 211, a second liquid inlet pipe 212, and a connecting joint 26. The first liquid inlet pipe 211 includes multiple liquid inlet branch pipes 2111. The first liquid inlet pipe 211 is connected to the first liquid outlet 23b and is located inside the battery pack (e.g., the aforementioned internal receiving cavity 10a). The first liquid inlet pipe 211 is connected to the second liquid inlet pipe 212 through the connecting joint 26. The second liquid inlet pipe 212 is located outside the battery pack (e.g., the aforementioned end receiving cavity 11a). The second liquid inlet pipe 212 is connected to the first inlet 21a and the second inlet 22a.

[0121] The purpose of designing the liquid inlet pipe assembly 210 to include a first liquid inlet pipe 211 and a second liquid inlet pipe 212 is to allow for the separate positioning of the liquid inlet pipe assembly 210. The first liquid inlet pipe 211 can be located at the left end of the second module 12c, and the second liquid inlet pipe 212 can be located in the aforementioned end receiving cavity 11a1.

[0122] In some specific embodiments, at least one of the liquid inlet branch pipes 2111 is connected to the first liquid outlet 23b, at least one is connected to the second inlet 22a of the second cold plate 22, and at least one is connected to the connecting joint 26, which is then connected to the second liquid inlet pipe 212 located in the end receiving cavity 11a1. The second liquid inlet pipe 212 can branch out into multiple liquid inlet branch pipes 2111 and connect to the first inlet 21a on other first cold plates 21.

[0123] In some embodiments, please refer to Figure 4 and Figure 4 The liquid outlet pipeline assembly 220 includes at least one liquid outlet connection inlet 220a and a liquid outlet connection outlet 220b adapted to the total number of the first outlet 21b and the second outlet 22b. The liquid outlet connection inlet 220a is connected to the return liquid port 23c, and the liquid outlet connection outlet 220b is connected to the first outlet 21b and the second outlet 22b.

[0124] It is understood that the liquid outlet connection inlet 220a needs to be connected to the aforementioned liquid return port 23c. The number of liquid outlet connection inlets 220a is not limited. The number of liquid outlet connection inlets 220a and liquid return ports 23c can be the same, and the two are in a one-to-one matching relationship. Of course, in other embodiments, multiple liquid outlet connection inlets 220a can be connected to one liquid return port 23c. This application does not impose any special restrictions on the liquid return port 23c, the liquid outlet connection inlets 220a, or the relationship between their numbers.

[0125] The liquid outlet 220b needs to be connected to the first outlet 21b and the second outlet 22b. Generally speaking, the first cold plate 21 can be provided with one first outlet 21b and the second cold plate can be provided with one second outlet 22b. Therefore, the number of liquid outlets 220b can be the same as the sum of the number of the first cold plate 21 and the second cold plate 22.

[0126] Thus, the refrigerant in the first cold plate 21 can sequentially pass through the first outlet 21b, the liquid outlet connection outlet 220b, and the liquid return port 23c and enter the third cold plate 23, and the refrigerant in the second cold plate 22 can sequentially pass through the second outlet 22b, the liquid outlet connection outlet 220b, and the liquid return port 23c and enter the third cold plate 23.

[0127] To accommodate the aforementioned installation method that does not occupy the internal space of the battery pack, the liquid outlet pipe assembly 220 may include a first liquid outlet pipe 221, a second liquid outlet pipe 222, and a connecting joint 26. The first liquid outlet pipe 221 includes multiple liquid outlet branch pipes 2211. The first liquid outlet pipe 221 is connected to the return port 23c and is located inside the battery pack. The first liquid outlet pipe 221 is connected to the second liquid outlet pipe 222 through the connecting joint 26. The second liquid outlet pipe 222 is located outside the battery pack and is connected to the first outlet 21b and the second outlet 22b.

[0128] The purpose of designing the liquid outlet pipe assembly 220 to include a first liquid outlet pipe 221 and a second liquid outlet pipe 222 is to allow for the separate positioning of the liquid outlet pipe assembly 220. The first liquid outlet pipe 221 can be located at the left end of the second module 12c, and the second liquid outlet pipe 222 can be located in the aforementioned end receiving cavity 11a1.

[0129] In some specific embodiments, at least one of the liquid outlet branch pipes 2211 is connected to the liquid return port 23c, at least one is connected to the second outlet 22b of the second cold plate 22, and at least one is connected to the connecting joint 26, which is then connected to the second liquid outlet pipe 222 located in the end receiving cavity 11a1. The second liquid outlet pipe 222 can branch out into multiple liquid outlet branch pipes 2211 and connect to the first outlet 21b on other first cold plates 21.

[0130] As described above, the first inlet pipe 211 and the first outlet pipe 221 form the first pipe group 24 in the pipe group 200, and the second inlet pipe 212 and the second outlet pipe 222 form the second pipe group 25 in the pipe group 200.

[0131] In some embodiments, pipe fittings 230 may be provided between the various interfaces. For example, pipe fittings 230 may be provided between the first liquid outlet 23b and the liquid inlet connection inlet 210a, between the liquid inlet connection outlet 210b and the first inlet 21a, between the return liquid outlet 23c and the liquid outlet connection inlet 220a, and between the liquid outlet connection outlet 220b and the first outlet 21b.

[0132] Furthermore, for the first inlet pipe 211 and the second outlet pipe 222, each inlet branch pipe 2111 can be connected to the other through a diverter 240, and for the first outlet pipe 221 and the second outlet pipe 222, each outlet branch pipe 2211 can be connected to the other through a diverter 240.

[0133] In some embodiments, please refer to Figure 1 The third cold plate 23 includes at least two straight sections 110, a bending and clearance section 120, and a flow channel structure 130.

[0134] The flat portion 110 can correspond to the second module 12c in the second main body 12 so as to dissipate heat from the second module 12c. The flat portion 110 can be designed to cover the corresponding second module 12c.

[0135] The bending and avoidance portion 120 is connected between two adjacent straight portions 110. The bending and avoidance portion 120 forms an avoidance opening 121, which, as mentioned above, is the aforementioned second groove 12a2.

[0136] The way the straight part 110 and the bending avoidance part 120 are connected to each other makes the third cold plate 23 a continuous structure. The third cold plate 23 is not designed as a partition structure for the separated second modules 12c, so that one third cold plate 23 can adapt to the installation and heat dissipation requirements of multiple second modules 12c.

[0137] The flow channel structure 130 is a structure that enables refrigerant flow on the third cold plate 23. The flow channel structure 130 is provided on the straight part 110 and the bending avoidance part 120.

[0138] In this embodiment, since the third cold plate 23 is configured with a straight portion 110 and a bending avoidance portion 120, the overall structure of the third cold plate 23 can avoid the vehicle longitudinal beam. The multiple straight portions 110 can be adapted to the installation and heat dissipation of multiple cell modules. For irregularly shaped combined battery packs, the number of cold plates and the number of connection structures in the battery pack can be reduced. Based on the reduction in the number of third cold plates and connection structures, the number of connection structures in the battery pack can be further reduced. On the one hand, it can simplify the structure and reduce costs. On the other hand, as the number of third cold plates and connection structures is reduced, the number of connection structures will also be reduced accordingly, thereby reducing the reliability requirements of the battery pack. Furthermore, as the number of third cold plates and connection structures is reduced, it is also beneficial to improve the utilization of the internal space of the battery pack by the cell modules, thereby increasing the capacity of the battery pack.

[0139] In some embodiments, the third cold plate 23 may include a heat spreader plate and a flow channel plate, both of which may be formed by integral bending. The flow channel plate may be connected to the heat spreader plate by welding or by attaching the flow channel plate to the heat spreader plate with thermally conductive adhesive.

[0140] It is understandable that the aforementioned straight section 110 and bending clearance section 120 are two components of the heat spreader plate, while the flow channel structure 130 can be formed by the flow channel plate.

[0141] In some embodiments, the flow channel structure 130 includes an inlet flow channel 131 and a return flow channel 132, which are connected. One end of the inlet flow channel 131 forms the aforementioned inlet port 23a, and one end of the return flow channel 132 forms an outlet port 1321.

[0142] The third cold plate 23 can be adapted to assemble multiple battery cell modules. For example, the third cold plate 23 can be adapted to be installed in the second body 12 in the previous embodiment.

[0143] In some specific embodiments, the liquid inlet 23a and the liquid outlet 1321 are located at the same end of the third cold plate 23.

[0144] In other embodiments, please refer to Figure 4 The flow channel structure 130 includes an inlet flow channel 131 and a return flow channel 132, which are separated. One end of the inlet flow channel 131 forms an inlet port 23a, and the other end of the inlet flow channel 131 forms a first outlet port 23b. One end of the return flow channel 132 forms a return port 23c, and the other end of the return flow channel 132 forms a second outlet port 23d.

[0145] The above-described arrangement of the third cold plate 23 enables it to communicate with other cold plates. For example, the cold plate can serve as the third cold plate 23 and communicate with the second cold plate 22.

[0146] In some specific embodiments, the liquid inlet 23a and the second liquid outlet 23d are located at one end of the third cold plate 23, and the first liquid outlet 23b and the liquid return outlet 23c are located at the other end of the cold plate.

[0147] In some embodiments, please refer to Figure 4 The inlet flow channel 131 extends along the length direction of the straight portion 110 and the bend avoidance portion 120, and the return flow channel 132 extends along the length direction of the straight portion 110 and the bend avoidance portion 120.

[0148] exist Figure 3 In the example shown, the length direction can be understood as the X direction. The above-mentioned flow channel design can make the flow channel cover each cell unit as much as possible, and can also reduce the flow resistance, so that the refrigerant can flow smoothly in the cold plate.

[0149] In some embodiments, please refer to ​ The bending avoidance part 120 includes a first avoidance part 122, a second avoidance part 123 and a third avoidance part 124. The second avoidance part 123 is arranged parallel to the straight part 110. The first avoidance part 122 and the third avoidance part 124 are connected between the straight part 110 and the first avoidance part 122.

[0150] The bending and avoidance part 120 can be designed according to the structural features of the second module 12c. The first avoidance part 122, the second avoidance part 123 and the third avoidance part 124 can fit into the surface of the second module 12c. The bending and avoidance part 120 can also play a role in heat dissipation of the second module 12c.

[0151] In some embodiments, please refer to ​ A gap can be left between the second clearance portion 123 and the second cold plate 22, thereby preventing condensation from forming between the second cold plate 22 and the third cold plate 23 due to temperature difference. Of course, in other embodiments, the second clearance portion 123 can also be fitted onto the second cold plate 22.

[0152] In addition, please refer to ​ A water storage tank 11a2 is formed around the connection joint 26 in the first housing 11a. The water storage tank 11a2 can collect the condensate formed between the first body 11 and the second body 12. In addition, a drainage channel communicating with the water storage tank 11a2 can be designed on the first housing 11a so that the battery pack can drain the condensate in a timely manner.

[0153] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are 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, and therefore should not be construed as a limitation of this application.

[0154] In the description of this application, it should be understood that the terms "comprising" and "having" and any variations thereof used in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0155] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, include: The battery pack body (10) has an interior and an exterior; The cold plate assembly (100) includes a first cold plate (21) and a second cold plate (22), the second cold plate (22) being located inside the battery pack body (10), and the first cold plate (21) extending from inside the battery pack body (10) to the outside and forming a connection end (21c); And a pipe assembly (200), at least a portion of which is disposed outside the battery pack body (10), the pipe assembly (200) connecting between the second cold plate (22) and the connection end (21c).

2. The battery pack according to claim 1, characterized in that, The cold plate assembly (100) includes a plurality of parallel and spaced-apart first cold plates (21), the first cold plates (21) being parallel to the second cold plates (22), and the second cold plates (22) being located above the first cold plates (21).

3. The battery pack according to claim 2, characterized in that, The cold plate assembly (100) further includes a third cold plate (23) disposed above the second cold plate (22). The third cold plate (23) includes a straight portion (110) parallel to the first cold plate (21) and a bent clearance portion (120) connecting two adjacent straight portions (110).

4. The battery pack according to claim 3, characterized in that, The third cold plate (23) also includes a flow channel structure (130), which is disposed on the straight portion (110) and the bending avoidance portion (120).

5. The battery pack according to claim 4, characterized in that, The flow channel structure (130) includes an inlet flow channel (131) and a return flow channel (132), the inlet flow channel (131) and the return flow channel (132) are connected, one end of the inlet flow channel (131) forms an inlet (23a), and one end of the return flow channel (132) forms an outlet (1321).

6. The battery pack according to claim 5, characterized in that, The liquid inlet (23a) and the liquid outlet (1321) are located at the same end of the third cold plate (23).

7. The battery pack according to claim 4, characterized in that, The flow channel structure (130) includes an inlet flow channel (131) and a return flow channel (132), which are separated. One end of the inlet flow channel (131) forms an inlet port (23a), and the other end of the inlet flow channel (131) forms a first outlet port (23b). One end of the return flow channel (132) forms a return port (23c), and the other end of the return flow channel (132) forms a second outlet port (23d).

8. The battery pack according to claim 7, characterized in that, The inlet (23a) and the second outlet (23d) are located at one end of the third cold plate (23), and the first outlet (23b) and the return outlet (23c) are located at the other end of the third cold plate (23).

9. The battery pack according to claim 5 or 7, characterized in that, The inlet channel (131) extends along the length of the straight portion (110) and the bend avoidance portion (120), and the return channel (132) extends along the length of the straight portion (110) and the bend avoidance portion (120).

10. The battery pack according to claim 9, characterized in that, The liquid inlet channel (131) includes a plurality of parallel sub-liquid inlet channels (131), and the liquid return channel (132) includes a plurality of parallel sub-liquid return channels (132).

11. The battery pack according to claim 3, characterized in that, The bending avoidance part (120) includes a first avoidance part (122), a second avoidance part (123) and a third avoidance part (124). The second avoidance part (123) is arranged parallel to the straight part (110). The first avoidance part (122) and the third avoidance part (124) are connected between the straight part (110) and the first avoidance part (122).

12. The battery pack according to claim 2, characterized in that, The cold plate assembly (100) further includes a third cold plate (23) disposed above the second cold plate (22). The third cold plate (23) includes an inlet channel (131) and a return channel (132), which are separated. One end of the inlet channel (131) forms an inlet (23a), and the other end of the inlet channel (131) forms a first outlet (23b). One end of the return channel (132) forms a return outlet (23c), and the other end of the return channel (132) forms a second outlet (23d). The inlet (23a) and the second outlet (23d) are located at one end of the third cold plate (23), and the first outlet (23b) and the return outlet (23c) are located at the other end of the third cold plate (23).

13. The battery pack according to claim 8 or 12, characterized in that, The first cold plate (21) includes a first inlet (21a) and a first outlet (21b), the first inlet (21a) and the first outlet (21b) of the first cold plate (21) are located at the first end of the cold plate assembly (100), the second cold plate (22) includes a second inlet (22a) and a second outlet (22b), the second inlet (22a) and the second outlet (22b) of the second cold plate (22) are located at the first end of the cold plate assembly (100), the first liquid outlet (23b) and the liquid return outlet (23c) are located at the first end of the cold plate assembly (100), the liquid inlet (23a) and the second liquid outlet (23d) are located at the second end of the cold plate assembly (100), and the pipe assembly (200) is used to connect the first liquid outlet (23b), the first inlet (21a) and the second inlet (22a) and to connect the liquid return outlet (23c), the first outlet (21b) and the second outlet (22b).

14. The battery pack according to claim 13, characterized in that, The pipeline assembly (200) includes: A liquid inlet pipe assembly (210) is connected between the first liquid outlet (23b) and the first inlet (21a) and the second inlet (22a); And an outlet pipe assembly (220) connected between the first outlet (21b), the second outlet (22b) and the return port (23c).

15. The battery pack according to claim 14, characterized in that, The liquid inlet pipe assembly (210) includes at least one liquid inlet connection inlet (210a) and a liquid inlet connection outlet (210b) adapted to the total number of the first inlet (21a) and the second inlet (22a). The liquid inlet connection inlet (210a) is connected to the first liquid outlet (23b), and the liquid inlet connection outlet (210b) is connected to the first inlet (21a) and the second inlet (22a).

16. The battery pack according to claim 15, characterized in that, The liquid inlet pipe assembly (210) includes a first liquid inlet pipe (211), a second liquid inlet pipe (212), and a connecting joint (26). The first liquid inlet pipe (211) is connected to the first liquid outlet (23b) and is located inside the battery pack body (10). The first liquid inlet pipe (211) is connected to the second liquid inlet pipe (212) through the connecting joint (26). The second liquid inlet pipe (212) is located outside the battery pack body (10) and is connected to the first inlet (21a).

17. The battery pack according to claim 16, characterized in that, The first liquid inlet pipe includes multiple liquid inlet branch pipes (2111), at least one of the liquid inlet branch pipes (2111) is connected to the first liquid outlet (23b), at least one of the liquid inlet branch pipes (2111) is connected to the second inlet (22a), at least one of the liquid inlet branch pipes (2111) is connected to the second liquid inlet pipe (212) through the connecting joint (26), and the first inlet (21a) is provided on the connecting end (21c).

18. The battery pack according to claim 14, characterized in that, The liquid outlet pipeline assembly (220) includes at least one liquid outlet connection inlet (220a) and a total number of liquid outlet connection outlets (220b) adapted to the number of the first outlet (21b) and the second outlet (22b). The liquid outlet connection inlet (220a) is connected to the return port (23c), and the liquid outlet connection outlet (220b) is connected to the first outlet (21b) and the second outlet (22b).

19. The battery pack according to claim 18, characterized in that, The liquid outlet pipe assembly (220) includes a first liquid outlet pipe (221), a second liquid outlet pipe (222), and a connecting joint (26). The first liquid outlet pipe (221) is connected to the return port (23c) and is located inside the battery pack body (10). The first liquid outlet pipe (221) is connected to the second liquid outlet pipe (222) through the connecting joint (26). The second liquid outlet pipe (222) is located outside the battery pack body (10) and is connected to the first outlet (21b) and the second outlet (22b).

20. The battery pack according to claim 19, characterized in that, The first liquid outlet pipe (221) includes a plurality of liquid outlet branch pipes (2211), at least one of the liquid outlet branch pipes (2211) is connected to the return port (23c), at least one of the liquid outlet branch pipes (2211) is connected to the second outlet (22b), at least one of the liquid outlet branch pipes (2211) is connected to the second liquid outlet pipe (222) through the connecting joint (26), and the first outlet (21b) is disposed on the connecting end (21c).

21. The battery pack according to any one of claims 1 to 20, characterized in that, The battery pack body includes: The first main body (11) includes a first housing (11a) and a first module (11b) corresponding to the first cold plate (21). The first cold plate (21) and the first module (11b) are located inside the first housing (11a). The first cold plate (21) extends out from the first housing (11a). One end of the first housing (11a) is formed with an end receiving cavity (11a1). At least a portion of the pipe assembly (200) is received in the end receiving cavity (11a1). The second body (12) is disposed on the first body (11). The second body (12) includes a second housing (12b) and a second module (12c) disposed corresponding to the second cold plate (22). The second cold plate (22) and the second module (12c) are located inside the second housing (12b).

22. The battery pack according to claim 21, characterized in that, It also includes a third cold plate (23), which is disposed corresponding to the second module (12c) and located above the second cold plate (22).

23. The battery pack according to claim 22, characterized in that, The first main body (11) includes a plurality of first housings (11a) stacked from bottom to top. The pipe assembly (200) includes a first pipe assembly (24), a second pipe assembly (25), and a connecting joint (26). The first pipe assembly (24) is connected between the third cold plate (23) and the first cold plate (21) adjacent to the third cold plate (23). The connecting joint (26) is disposed on the first housing (11a) near the second housing (12b). The second pipe assembly (25) is connected to the first pipe assembly (24) through the connecting joint (26). The second pipe assembly (25) is received in the end receiving cavity (11a1).

24. The battery pack according to claim 23, characterized in that, The second pipe assembly (25) is connected to the connection end (21c) on the first cold plate (21).

25. The battery pack according to claim 24, characterized in that, The first housing (11a) has a water storage tank (11a2) formed around the position of the connecting joint (26).

26. The battery pack according to claim 24, characterized in that, The two adjacent end receiving cavities (11a1) are connected.

27. The battery pack according to any one of claims 21 to 26, characterized in that, The battery pack also includes: A cover (30) is sealed to the first housing (11a).

28. An electrical appliance, characterized in that, The battery pack includes any one of claims 1 to 27.

Images