Battery pack

Abstract

The application provides a battery pack, which comprises a box body with a battery compartment and an electrical compartment, a plurality of single batteries are arranged in the battery compartment, an electrical assembly electrically connected with the single batteries is arranged in the electrical compartment, and a liquid cooling system composed of a first liquid cooling assembly and a second liquid cooling assembly is further arranged. The first liquid cooling assembly is arranged in the battery compartment, the second liquid cooling assembly is at least partially arranged in the electrical compartment, and the two are communicated to form an integrated cooling circuit. The battery pack can realize the cooperative heat dissipation of the battery compartment and the electrical compartment, avoid the heat accumulation from affecting the performance and safety, and simplify the pipeline layout of the integrated circuit, reduce the space occupation of the liquid cooling assembly in the electrical compartment, avoid the extrusion of other elements, and effectively improve the overall cooling efficiency and space utilization.

Description

Technical Field

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

[0002] In various electronic devices and new energy systems, the cooling of the battery compartment and electrical compartment is crucial. Both need to accommodate energy storage batteries, cooling systems, electrical modules, and other equipment within a limited space, and their internal space layout often presents challenges, especially the arrangement of the cooling systems in the battery compartment and electrical compartment.

[0003] In the existing technology, the battery compartment and the electrical compartment are each equipped with an independent cooling system, which has low cooling efficiency, affecting battery performance and safety. Furthermore, the liquid cooling components of the electrical compartment are complex due to the pipes, cold plates, etc., occupying a large space and squeezing the space of other components, further affecting the cooling efficiency. Utility Model Content

[0004] In view of the problems existing in the background art, this application provides a battery pack to solve the problems in the related art.

[0005] To solve the above problems, this application is implemented as follows:

[0006] This application provides a battery pack, characterized in that it includes: a housing having a battery compartment and an electrical compartment; multiple individual batteries disposed within the battery compartment; an electrical component electrically connected to the individual batteries and disposed within the electrical compartment; and a liquid cooling system including a first liquid cooling component and a second liquid cooling component, wherein the first liquid cooling component is disposed in the battery compartment, and at least a portion of the second liquid cooling component is disposed in the electrical compartment; the cavities of the first liquid cooling component and the second liquid cooling component are in communication.

[0007] Optionally, the housing has a vertically arranged first direction X and a second direction Y; the first liquid cooling assembly includes a first liquid cooling plate, an inlet manifold, and an outlet manifold; the first liquid cooling plate extends along the first direction X and is located within the battery compartment, and multiple first liquid cooling plates are provided, with the multiple first liquid cooling plates spaced apart along the second direction Y, and multiple individual batteries arranged along the first direction X are disposed between two adjacent first liquid cooling plates; both the inlet manifold and the outlet manifold extend along the second direction Y; the first liquid cooling plate has a first liquid inlet end and a first liquid outlet end, all of the first liquid inlet ends are connected to the inlet manifold, and all of the first liquid outlet ends are connected to the outlet manifold; the second liquid cooling assembly includes a second liquid cooling plate, which is located along the first direction X on the side of the outlet manifold away from the first liquid cooling plate, and the second liquid cooling plate is in communication with at least one of the inlet manifold and the outlet manifold.

[0008] Optionally, the liquid cooling system further includes an inlet manifold and an outlet manifold; the inlet manifold is connected to the inlet manifold, a portion of the inlet manifold is located inside the electrical compartment, the inlet manifold passes through the housing, and the other portion of the inlet manifold is located outside the housing; the outlet manifold is connected to the outlet manifold, a portion of the outlet manifold is located inside the electrical compartment, the outlet manifold passes through the housing, and the other portion of the outlet manifold is located outside the housing; the second liquid cooling plate is connected to at least one of the inlet manifold and the outlet manifold.

[0009] Optionally, the second liquid cooling plate has a second liquid inlet and a second liquid outlet; both the second liquid inlet and the second liquid outlet are connected to the liquid inlet manifold, or both the second liquid inlet and the second liquid outlet are connected to the liquid outlet manifold.

[0010] Optionally, the second liquid cooling plate has a second liquid inlet and a second liquid outlet, the second liquid inlet being connected to the liquid inlet manifold and the second liquid outlet being connected to the liquid outlet manifold.

[0011] Optionally, the second liquid cooling plate is bent and connected between the inlet manifold and the outlet manifold in the second direction Y.

[0012] Optionally, the liquid cooling system further includes a main inlet pipe, a portion of which is located inside the electrical compartment, the main inlet pipe passing through the housing, and the other portion of which is located outside the housing. An inlet manifold is connected to the main inlet pipe. The second liquid cooling plate has a second inlet end and a second outlet end. The second inlet end is connected to the outlet manifold. The second liquid cooling plate passes through the housing, and the second outlet end is located outside the housing. Alternatively, the liquid cooling system further includes an outlet main pipe, a portion of which is located inside the electrical compartment, the main outlet pipe passing through the housing, and the other portion of which is located outside the housing. The outlet main pipe is connected to the outlet manifold. The second liquid cooling plate has a second inlet end and a second outlet end. The second liquid cooling plate passes through the housing, the second inlet end is located outside the housing, and the second outlet end is connected to the inlet manifold.

[0013] Optionally, the housing further has a third direction Z perpendicular to both the first direction X and the second direction Y. The housing includes a frame and a partition, the partition being connected to the frame. The battery compartment and the electrical compartment are located on opposite sides of the partition in the first direction X. The partition has a mounting cavity, and both the liquid inlet manifold and the liquid outlet manifold are disposed within the mounting cavity. The liquid inlet manifold is located on one side of the liquid outlet manifold in the third direction Z.

[0014] Optionally, the partition plate is provided with a first through hole communicating with the mounting cavity. There are multiple first through holes, each corresponding to one of the first liquid cooling plates. The first through holes extend along the third direction Z and are arranged in a strip shape. The first liquid cooling plate passes through the first through hole and communicates with the liquid inlet manifold and the liquid outlet manifold.

[0015] Optionally, the housing further includes an insulating layer covering the separator; and / or, the individual battery is a cylindrical battery, the first liquid cooling plate has a recess, the recess has a plurality of recesses spaced apart along the first direction X, and the recesses match the individual battery.

[0016] This application divides the battery compartment and electrical compartment into independent sections by using a housing, with several individual batteries and electrical components respectively, making the layout of the two more reasonable and avoiding mutual space encroachment. The first liquid cooling component and the second liquid cooling component in the liquid cooling system are connected to form an integrated cooling circuit. Compared with setting two separate liquid cooling systems, sharing a single liquid cooling system is more space-efficient and cost-effective, and can simultaneously dissipate heat for the battery compartment and electrical compartment, improving overall cooling efficiency and ensuring battery performance and safety. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a battery pack according to this application;

[0019] Figure 2 This is a schematic diagram of a battery pack without individual cells in this application;

[0020] Figure 3 This is a schematic diagram of the liquid cooling system in the battery pack of this application;

[0021] Figure 4 This is a schematic diagram of the first liquid cooling plate in this application;

[0022] Figure 5 This is a schematic diagram showing the connection between the first liquid cooling plate and the inlet manifold and the outlet manifold in this application;

[0023] Figure 6 This is a schematic diagram showing the second liquid cooling component disposed between the inlet manifold and the outlet manifold in this application;

[0024] Figure 7 This is a schematic diagram showing the second liquid outlet end of the second liquid cooling plate located outside the casing in this application;

[0025] Figure 8 This is a schematic diagram showing the inlet manifold and outlet manifold arranged in the cavity of the partition plate in this application;

[0026] Figure 9 This is a schematic diagram of the first through hole in the partition plate in this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100. Housing; 101. Battery compartment; 102. Electrical compartment; 110. Frame; 120. Partition; 121. Mounting cavity; 122. First through hole; 200. Single battery cell; 300. Electrical components; 400. Liquid cooling system; 410. First liquid cooling component; 420. Second liquid cooling component; 430. Liquid inlet manifold; 440. Liquid outlet manifold; 411. First liquid cooling plate; 412. Liquid inlet manifold; 413. Liquid outlet manifold; 4111. First liquid inlet end; 4112. First liquid outlet end; 4113. Recess; 421. Second liquid cooling plate; 4211. Second liquid inlet end; 4212. Second liquid outlet end. Detailed Implementation

[0029] 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 a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. Based on the embodiments of this application, any product that is the same as or similar to this application, derived by anyone under the guidance of this application or by combining features of this application with other related technologies, falls within the protection scope of this application. Furthermore, all other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of this application.

[0030] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of this application specification.

[0031] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown in the figure, this application embodiment provides a battery pack, which includes: a housing 100, the housing 100 having a battery compartment 101 and an electrical compartment 102; individual batteries 200, multiple individual batteries 200 are provided, and the multiple individual batteries 200 are disposed in the battery compartment 101; an electrical component 300, the electrical component 300 is electrically connected to the individual batteries 200 and is disposed in the electrical compartment 102; a liquid cooling system 400, the liquid cooling system 400 including a first liquid cooling component 410 and a second liquid cooling component 420, the first liquid cooling component 410 being disposed in the battery compartment 101, and at least a portion of the second liquid cooling component 420 being disposed in the electrical compartment 102; the cavity of the first liquid cooling component 410 and the cavity of the second liquid cooling component 420 are connected.

[0033] Specifically, the battery pack in this application includes a housing 100, individual cells 200, electrical components 300, and a liquid cooling system 400. The housing 100 of the battery pack is divided into a battery compartment 101 and an electrical compartment 102. Multiple individual cells 200 are disposed within the battery compartment 101, and the electrical components 300 are disposed within the electrical compartment 102, and the electrical components 300 are electrically connected to the individual cells 200. The battery housing 100 can be made of high-strength aluminum alloy; however, this application does not limit the specific material used. The battery pack in this application can be applied to both CTM (Cell To Module) and CTP (Cell To Pack); this application does not limit whether the individual cells 200 in the battery pack form a module.

[0034] The liquid cooling system 400 includes a first liquid cooling component 410 and a second liquid cooling component 420. The first liquid cooling component 410 is disposed in the battery compartment 101 and is used to cool the individual battery cells 200 in the battery compartment 101. In some embodiments, the first liquid cooling component 410 may include a plurality of first liquid cooling plates 411, which are spaced apart from the individual battery cells 200 to ensure sufficient contact with each individual battery cell 200 for uniform heat dissipation. The second liquid cooling component 420 is disposed in the electrical compartment 102 and is used to cool the electrical components 300 in the electrical compartment 102.

[0035] In some embodiments, the second liquid cooling assembly 420 may also include a plurality of second liquid cooling plates 421, which are respectively attached to components in the electrical assembly 300 where heat generation is concentrated, to cool the multiple electrical components. In other embodiments, the second liquid cooling assembly 420 may also be a flat liquid cooling coil, which can be embedded under the electrical components in the electrical compartment 102. A thermally conductive pad is provided between the electrical components and the liquid cooling coil to achieve efficient heat absorption. Furthermore, the cavity of the first liquid cooling assembly 410 is connected to the cavity of the second liquid cooling assembly 420, so that the first liquid cooling assembly 410 and the second liquid cooling assembly 420 form an integrated cooling circuit. In use, the coolant only needs to flow in from one inlet to flow through the first liquid cooling assembly 410 and the second liquid cooling assembly 420, and then flow out from one outlet to dissipate heat for both the battery compartment 101 and the electrical compartment 102, thereby improving the overall cooling efficiency. The housing 100 can be divided into a battery compartment 101 and an electrical compartment 102 by a crossbeam or a partition 120, but the embodiments of this application do not limit this.

[0036] Understandably, by dividing the liquid cooling system 400 into a first liquid cooling component 410 corresponding to the battery compartment 101 and a second liquid cooling component 420 located at least partially in the electrical compartment 102, and connecting the two cavities to form an integrated cooling circuit, the low cooling efficiency problem caused by the independent cooling systems of the battery compartment 101 and the electrical compartment 102 in the prior art is effectively solved. It can simultaneously provide coordinated heat dissipation for the individual battery cells 200 and the electrical components 300, avoiding the mutual influence of heat accumulation between the two and thus preventing damage to battery performance and safety. At the same time, the integrated cavity design simplifies the pipe connections and cold plate arrangement of the traditional independent cooling system, reduces the space occupied by the liquid cooling component in the electrical compartment 102, avoids squeezing the installation space of other components, and further improves the overall heat dissipation efficiency of the cooling system by optimizing the spatial layout, ensuring the long-term stable operation of the battery pack.

[0037] Optionally, such as Figure 3 , Figure 4 and Figure 5 As shown, the housing 100 has a first direction X and a second direction Y that are vertically arranged; the first liquid cooling assembly 410 includes a first liquid cooling plate 411, an inlet manifold 412 and an outlet manifold 413; the first liquid cooling plate 411 is arranged along the first direction X. X Extending and located within the battery compartment 101, multiple first liquid cooling plates 411 are provided, spaced apart along the second direction Y. Multiple single-cell batteries 200 arranged along the first direction X are disposed between two adjacent first liquid cooling plates 411. The inlet manifold 412 and the outlet manifold 413 both extend along the second direction Y. The first liquid cooling plate 411 has a first inlet end 4111 and a first outlet end 4112. All first inlet ends 4111 are connected to the inlet manifold 412, and all first outlet ends 4112 are connected to the outlet manifold 413. The second liquid cooling assembly 420 includes a second liquid cooling plate 421. Along the first direction X, the second liquid cooling plate 421 is located on the side of the outlet manifold 413 away from the first liquid cooling plate 411, and the second liquid cooling plate 421 is in communication with at least one of the inlet manifold 412 and the outlet manifold 413.

[0038] Specifically, the first liquid cooling plate 411 extends in a long strip along the first direction X, and multiple first liquid cooling plates 411 are arranged in parallel with uniform intervals along the second direction Y in the battery compartment 101. An accommodating space is formed between two adjacent first liquid cooling plates 411, and multiple single cells 200 are arranged sequentially in the space along the first direction X, with the side of the single cell 200 in contact with the surface of the first liquid cooling plate 411.

[0039] Both the inlet manifold 412 and the outlet manifold 413 are arranged across the width of the battery compartment 101 along the second direction Y. The inlet manifold 412 has an interface corresponding to the position of each first liquid cooling plate 411. The first inlet end 4111 of each first liquid cooling plate 411 is connected to the corresponding interface of the inlet manifold 412. Similarly, the first outlet end 4112 of all first liquid cooling plates 411 is connected to the outlet manifold 413, so that coolant enters through the inlet manifold 412, enters the first liquid cooling plate 411 through the first inlet end 4111, and then enters the outlet manifold 413 through the first outlet end 4112 of the first liquid cooling plate 411. In some embodiments, such as... Figure 5 As shown, both the inlet manifold 412 and the outlet manifold 413 are composed of multiple sub-manifolds, and each sub-manifold is connected to a first liquid cooling plate 411.

[0040] In some embodiments, the inlet manifold 412 and the outlet manifold 413 are spaced apart along a third direction Z. A first inner baffle extending along a first direction X is provided inside the first liquid cooling plate 411. This first inner baffle divides the first liquid cooling plate 411 into an inlet channel and an outlet channel along the third direction Z. The length of the first inner baffle along the first direction X is less than the length of the first liquid cooling plate 411, so that the inlet channel and the outlet channel are connected at the end of the first liquid cooling plate 411 away from the inlet manifold 412 along the first direction X. Further, in some embodiments, the first liquid cooling plate 411 also includes a plurality of second inner baffles, which are arranged parallel to the first inner baffle. These second inner baffles divide the outlet channel and the inlet channel of the liquid cooling plate into multiple sub-channels, allowing the coolant to flow uniformly in the inlet and outlet channels.

[0041] The second liquid cooling plate 421 is arranged along the first direction X on the side of the liquid outlet manifold 413 away from the first liquid cooling plate 411. The second liquid cooling plate 421 can be connected to the liquid inlet manifold 412, or to the liquid outlet manifold 413, or to both the liquid inlet manifold 412 and the liquid outlet manifold 413. The main body of the second liquid cooling plate 421 extends into the electrical compartment 102, and its surface contacts the electrical component 300 to cool the electrical component 300.

[0042] Understandably, the alternating arrangement of multiple first liquid cooling plates 411 and individual battery cells 200, combined with the centralized distribution structure of the inlet manifold 412 and outlet manifold 413, ensures that each first liquid cooling plate 411 receives a balanced coolant flow, achieving uniform heat dissipation for all individual battery cells 200 and preventing localized overheating. The design of the second liquid cooling plate 421 being directly connected to the manifold eliminates the need for independent connecting pipes, simplifies the structure of the liquid cooling system 400, and reduces the space occupied within the electrical compartment 102. Simultaneously, the arrangement of the second liquid cooling plate 421 on one side of the outlet manifold 413 allows for tiered heat dissipation using residual heat from the coolant after passing through or before the battery compartment 101, improving energy utilization efficiency. The overall structure ensures both uniform and efficient cooling while optimizing the spatial layout, enhancing the compactness and safety of the battery pack.

[0043] Optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the liquid cooling system 400 also includes an inlet manifold 430 and an outlet manifold 440; the inlet manifold 430 is connected to the inlet manifold 412, a part of the inlet manifold 430 is located inside the electrical compartment 102, the inlet manifold 430 passes through the housing 100, and the other part of the inlet manifold 430 is located outside the housing 100; the outlet manifold 440 is connected to the outlet manifold 413, a part of the outlet manifold 440 is located inside the electrical compartment 102, the outlet manifold 440 passes through the housing 100, and the other part of the outlet manifold 440 is located outside the housing 100; the second liquid cooling plate 421 is connected to at least one of the inlet manifold 430 and the outlet manifold 440.

[0044] Specifically, such as Figure 1 and Figure 3As shown, one end of the inlet manifold 430 passes through the housing 100 from the outside and extends into the electrical compartment 102, where it connects to one end of the inlet manifold 412 extending along the second direction Y. Similarly, the outlet manifold 440 passes through the housing 100, with its portion inside the electrical compartment 102 connected to one end of the outlet manifold 413. Sealing rings are provided at the connections between the inlet manifold 412 and the inlet manifold 430, as well as between the outlet manifold 413 and the outlet manifold 440, to ensure a sealed connection between the inlet / outlet manifold 413 and the inlet / outlet manifold 440. The second liquid cooling plate 421 is connected to the inlet manifold 430 and / or the outlet manifold 440. When the second liquid cooling plate 421 is connected to the inlet manifold 430, the coolant flows in from the end of the inlet manifold 430 located outside the housing 100, passes through the second liquid cooling plate 421 and then enters the inlet manifold 412, passes through multiple first liquid cooling plates 411 and then enters the outlet manifold 413, and then flows into the outlet manifold 440 and flows out from the end of the outlet manifold 440 located outside the housing 100. When the second liquid cooling plate 421 is connected to the outlet manifold 440, the coolant flows in from the end of the inlet manifold 430 located outside the housing 100, enters the inlet manifold 412 from the inlet manifold 430, enters the outlet manifold 413 after passing through multiple first liquid cooling plates 411, and then flows into the outlet manifold 440. After passing through the second liquid cooling plate 421 connected to the outlet manifold 440, it flows out from the end of the outlet manifold 440 located outside the housing 100.

[0045] Understandably, the structure of the inlet manifold 430 and outlet manifold 440 passing through the housing 100 and directly connected to the manifold reduces redundant piping within the housing 100, allowing external coolant to be efficiently distributed to the liquid-cooled components in the battery compartment 101 via the manifold. The direct connection design of the second liquid-cooled plate 421 to the inlet manifold 430 and / or outlet manifold 440 eliminates the need for a separate supply line, simplifies the piping layout within the electrical compartment 102, reduces space occupancy, and avoids encroaching on the installation space of other electrical components. Simultaneously, the portion of the manifold within the electrical compartment 102 provides a nearby coolant source for the second liquid-cooled plate 421, reducing heat loss during coolant transfer and improving the cooling response speed to the electrical components 300. The overall structure balances the integration of the cooling system with heat dissipation efficiency.

[0046] Optionally, such as Figure 1 and Figure 3 As shown, the second liquid cooling plate 421 has a second liquid inlet end 4211 and a second liquid outlet end 4212; both the second liquid inlet end 4211 and the second liquid outlet end 4212 are connected to the liquid inlet manifold 430, or both the second liquid inlet end 4211 and the second liquid outlet end 4212 are connected to the liquid outlet manifold 440.

[0047] Specifically, the second liquid cooling plate 421 can be a flat flow channel with a second liquid inlet end 4211 and a second liquid outlet end 4212, both of which are connected to the liquid inlet manifold 430 or the liquid outlet manifold 440. In some embodiments, the liquid inlet manifold 430 is divided into two sections. The second liquid inlet end 4211 of the second liquid cooling plate 421 is directly connected to the outlet of one section of the liquid inlet manifold 430, and the second liquid outlet end 4112 of the second liquid cooling plate 421 is directly connected to the inlet of the other section of the liquid inlet manifold 430, so that the second liquid cooling plate is directly connected in series on the liquid inlet manifold 430. Figure 1 and Figure 2 As shown, in some other embodiments, the liquid outlet manifold 440 is divided into two sections. The second liquid inlet end 4211 of the second liquid cooling plate 421 is directly connected to the outlet of one section of the liquid outlet manifold 440, and the second liquid outlet end 4212 of the second liquid cooling plate 421 is directly connected to the inlet of the other section of the liquid outlet manifold 440, so that the second cooling plate is directly connected in series on the liquid outlet manifold 440.

[0048] Or, such as Figure 1 As shown, in some embodiments, the main inlet pipe 430 includes two branches, namely a first inlet pipe and a second inlet pipe. One end of the first inlet pipe extends out of the housing 100, and the other end is connected to the inlet manifold 412. The second inlet pipe includes two sections. One end of the two sections of the second inlet pipe is connected to the first inlet pipe, and the other end of the two sections of the second inlet pipe is connected to the second inlet end 4211 and the second outlet end 4212 of the second liquid cooling plate 421, so that the second liquid cooling plate 421 is connected in parallel with the first inlet pipe. In other embodiments, the main outlet pipe 440 includes two branches, namely a first outlet pipe and a second outlet pipe. One end of the first outlet pipe extends out of the housing 100, and the other end is connected to the outlet manifold 413. The second outlet pipe includes two sections. One end of each of the two sections is connected to the first outlet pipe, and the other ends of each section are connected to the second inlet end 4211 and the second outlet end 4212 of the second liquid cooling plate 421, so that the second liquid cooling plate 421 is connected in parallel with the first outlet pipe.

[0049] Understandably, the design of having both ends of the second liquid cooling plate 421 connected to either the inlet manifold 430 or the outlet manifold 440 eliminates the need for separate supply and return pipelines, significantly simplifying the piping layout within the electrical compartment 102 and reducing space requirements. By directly diverting liquid from the manifold to supply liquid to the second liquid cooling plate 421, the flow rate and temperature of the medium entering the second liquid cooling plate 421 can be flexibly adjusted. This allows for enhanced heat dissipation using the low-temperature medium from the inlet manifold 430, or adaptive cooling using the medium from the outlet manifold 440. Simultaneously, this single-manifold connection structure reduces the number of pipe interfaces, lowers the risk of leakage, and improves the reliability and ease of maintenance of the liquid cooling system 400.

[0050] Optionally, such as Figure 6 As shown, the second liquid cooling plate 421 has a second liquid inlet end 4211 and a second liquid outlet end 4212. The second liquid inlet end 4211 is connected to the liquid inlet manifold 430, and the second liquid outlet end 4212 is connected to the liquid outlet manifold 440.

[0051] Specifically, the second inlet end 4211 is connected to the section of the inlet manifold 430 located inside the electrical compartment 102, and the second outlet end 4212 is connected to the section of the outlet manifold 440 located inside the electrical compartment 102, so that the coolant flows in from the inlet of the inlet manifold 430 located outside the housing 100. Part of the coolant enters the second liquid cooling plate 421 through the second inlet end 4211, and the other part enters the first liquid cooling plate 411 through the inlet manifold 412. The coolant flowing out of the first liquid cooling plate 411 enters the outlet manifold 440 through the outlet manifold 413, and the coolant flowing out of the second liquid cooling plate 421 enters the outlet manifold 440 through the second outlet end 4212. The two flow together and flow out from the outlet of the outlet manifold 440 located outside the housing 100.

[0052] Understandably, the design of the second liquid cooling plate 421, connected to the inlet manifold 430 via its inlet end and to the outlet manifold 440 via its outlet end 4212, forms an independent and complete cooling branch. This design allows for efficient heat dissipation using the low-temperature medium in the inlet manifold 430, while also enabling timely discharge of the heat-absorbing medium through the outlet manifold 440, preventing heat accumulation within the electrical compartment 102. This connection method ensures that the cooling intensity of the second liquid cooling plate 421 is unaffected by flow fluctuations in the liquid cooling components of the battery compartment 101, thus specifically meeting the heat dissipation requirements of the electrical components 300. Furthermore, compared to a structure where both ends are connected to a single manifold, this design reduces energy loss during localized circulation, improves cooling efficiency, and allows for flexible arrangement of branch pipes to adapt to the complex spatial environment within the electrical compartment 102, avoiding layout conflicts with other components.

[0053] Optionally, such as Figure 6 As shown, the second liquid cooling plate 421 is bent and is connected between the liquid inlet manifold 430 and the liquid outlet manifold 440 in the second direction Y.

[0054] Specifically, the second liquid cooling plate 421 adopts a serpentine, flat flow channel structure, arranged in a U-shape between the inlet manifold 430 and the outlet manifold 440 along the second direction Y. The bends are rounded to reduce flow resistance. The second inlet end 4211 extends from one end of the bend and connects to the side wall of the inlet manifold 430, and the second outlet end 4212 extends from the other end of the bend and connects to the corresponding position of the outlet manifold 440. The liquid cooling plate is attached to the heat-generating components with high heat output in the electrical assembly 300.

[0055] Understandably, the bent design of the second liquid cooling plate 421 allows it to fully fill the space between the inlet manifold 430 and the outlet manifold 440 in the second direction Y, increasing the contact area with the electrical components 300 within a limited size, and enabling simultaneous heat dissipation from multiple dispersed heat-generating components. The layout connecting the two manifolds along the second direction Y shortens the pipe connection distance, reduces heat loss along the medium transmission path, and improves the cooling response speed. While optimizing heat dissipation efficiency, it also improves the space utilization within the electrical compartment 102, enabling a compact integration of the liquid cooling system 400 and the electrical components.

[0056] Optionally, such as Figure 7 As shown, the liquid cooling system 400 also includes a main inlet pipe 430. A portion of the main inlet pipe 430 is located inside the electrical compartment 102, and the main inlet pipe 430 passes through the housing 100. The other portion of the main inlet pipe 430 is located outside the housing 100. An inlet manifold 412 is connected to the main inlet pipe 430. The second liquid cooling plate 421 has a second inlet end 4211 and a second outlet end 4212. The second inlet end 4211 is connected to the outlet manifold 413. The second liquid cooling plate 421 passes through the housing 100, and the second outlet end 4212 is located outside the housing 100. Alternatively, the liquid cooling system 400 may also include a liquid outlet manifold 440, a portion of which is located inside the electrical compartment 102, the liquid outlet manifold 440 passing through the housing 100, and the other portion of which is located outside the housing 100. The liquid outlet manifold 440 is connected to the liquid outlet manifold 413. The second liquid cooling plate 421 has a second liquid inlet end 4211 and a second liquid outlet end 4212. The second liquid cooling plate 421 passes through the housing 100, the second liquid inlet end 4211 is located outside the housing 100, and the second liquid outlet end 4212 is connected to the liquid inlet manifold 412.

[0057] Specifically, when the liquid cooling system 400 adopts the structure of the liquid inlet manifold 430, the liquid inlet manifold 430 extends from the side wall of the housing 100 into the electrical compartment 102 and is sealed to the liquid inlet manifold 412. The second liquid cooling plate 421 is flat, and its second liquid inlet end 4211 is connected to the interface of the liquid outlet manifold 413. The main body of the second liquid cooling plate 421 extends along the electrical compartment 102 and exits from the side wall of the housing 100. The second liquid outlet end 4212 is located outside the housing 100. The side wall into which the liquid inlet manifold 430 enters and the side wall through which the second liquid cooling plate 421 exits the housing 100 can be the same side wall or different side walls. Preferably, the side wall into which the liquid inlet manifold 430 enters and the side wall through which the second liquid cooling plate 421 exits the housing 100 are the same side wall, so that the arrangement of the liquid inlet manifold 430 and the second liquid cooling plate 421 is more reasonable. In use, the coolant flows in through the inlet of the main inlet pipe 430 located outside the housing 100, enters the inlet manifold 412, passes through the first liquid cooling plate 411 and enters the outlet manifold 413, then enters the second liquid cooling plate 421 through the second inlet end 4211 from the outlet manifold 413, and finally flows out from the second outlet end 4212 of the second liquid cooling plate 421 located outside the housing 100.

[0058] In some embodiments, the second liquid cooling plate 421 is bent, and the second liquid inlet end 4211 of the second liquid cooling plate 421 is connected to the liquid outlet manifold 413. Along the first direction X, the second liquid outlet end 4212 and the liquid inlet manifold 430 both pass through the side wall of the frame 110 away from the first liquid cooling assembly 410. Along the second direction Y, the distance between the position of the second liquid outlet end 4212 extending out of the housing 100 and the position of the liquid inlet manifold 430 extending out of the housing 100 is less than the diameter of the liquid inlet manifold 430, so that the extension positions of the second liquid cooling plate 421 and the liquid inlet manifold 430 are in close contact, which facilitates the connection between the external liquid cooling pipe and the liquid cooling system 400 and further reduces the space occupation.

[0059] Similarly, when the liquid cooling system 400 adopts the liquid outlet manifold 440 structure, the liquid outlet manifold 440 extends from the side wall of the housing 100 into the electrical compartment 102 and is sealed to the liquid outlet manifold 413. The second liquid cooling plate 421 is flat, and its second liquid inlet end 4211 is located outside the housing 100. The second liquid cooling plate 421 extends from the side wall of the housing 100, and its main body extends along the electrical compartment 102. The second liquid outlet end 4212 is connected to the liquid inlet manifold 412. The side wall through which the liquid outlet manifold 440 exits the housing 100 and the side wall through which the second liquid cooling plate 421 enters the housing 100 can be the same side wall or different side walls. Preferably, the side wall through which the liquid outlet manifold 440 exits the housing 100 and the side wall through which the second liquid cooling plate 421 enters the housing 100 are the same side wall, so that the arrangement of the liquid outlet manifold 440 and the second liquid cooling plate 421 is more reasonable. In use, the coolant flows in from the second inlet end 4211 of the second liquid cooling plate 421 located outside the housing 100, passes through the main body of the second liquid cooling plate 421, flows into the inlet manifold 412 from the second outlet end 4212, flows into the first liquid cooling plate 411 from the inlet manifold 412, then flows into the outlet manifold 413, and then flows directly into the outlet main pipe 440 from the outlet manifold 413, and finally flows out from the outlet of the outlet main pipe 440 located outside the housing 100.

[0060] Understandably, by connecting the inlet manifold 430 to the inlet header 412, connecting the second inlet end 4211 of the second liquid cooling plate 421 to the outlet header 413, and directly discharging the coolant from the second outlet end 4212 of the second liquid cooling plate 421, or by having the coolant flow in from the second inlet end 4211 of the second liquid cooling plate 421, connecting the second outlet end 4212 of the second liquid cooling plate 421 to the inlet header 412, and connecting the outlet header 413 to the outlet manifold 440, and then having the coolant flow out from the outlet of the outlet manifold 440, a series cooling circuit is formed. This allows the cooling medium to be utilized in stages according to the heat dissipation requirements of the battery compartment 101 and the electrical compartment 102, improving energy utilization efficiency. The independent bidirectional manifold structure is eliminated; medium circulation is achieved solely through a single manifold in conjunction with the second liquid cooling plate 421 passing through the housing 100, significantly simplifying the piping layout within the electrical compartment 102 and reducing space occupation. Meanwhile, the design of the second liquid cooling plate 421 directly penetrating the housing 100 shortens the external pipeline connection distance, reduces the flow resistance loss caused by pipeline bends, and reduces the number of interfaces, thereby improving the system's sealing performance and operational reliability.

[0061] Optionally, such as Figure 1 , Figure 2 and Figure 8As shown, the housing 100 also has a third direction Z that is perpendicular to both the first direction X and the second direction Y. The housing 100 includes a frame 110 and a partition 120. The partition 120 is connected to the frame 110. The battery compartment 101 and the electrical compartment 102 are located on opposite sides of the partition 120 in the first direction X. The partition 120 is provided with a mounting cavity 121. The liquid inlet manifold 412 and the liquid outlet manifold 413 are both disposed in the mounting cavity 121, and the liquid inlet manifold 412 is located on the side of the liquid outlet manifold 413 in the third direction Z.

[0062] Specifically, the housing 100 includes a frame 110 and a partition 120. The partition 120 is connected to two opposite sides of the frame 110. The partition 120 and the frame 110 can be connected by bolts or the partition 120 and the frame 110 can be an integrated structure. This embodiment does not limit the specific structure. The partition 120 divides the housing 100 into a battery compartment 101 and an electrical compartment 102 along the first direction X. The partition 120 has a mounting cavity 121 extending along the second direction Y. The liquid inlet manifold 412 and the liquid outlet manifold 413 are embedded in the mounting cavity 121. They are spaced apart along the third direction Z, so that the liquid outlet manifold 413 is located on the side of the liquid inlet manifold 412 in the third direction Z.

[0063] Understandably, separating the battery compartment 101 and the electrical compartment 102 in the first direction X via the partition 120 reduces heat conduction and electrical interference between them. The mounting cavity 121 within the partition 120 provides integrated mounting space for the inlet manifold 412 and the outlet manifold 413, preventing the manifolds from occupying the effective volume of the battery compartment 101 or the electrical compartment 102, while the cavity wall protects the manifolds from external impacts. The arrangement of the inlet manifold 412 and the outlet manifold 413 at intervals in the third direction Z avoids pipe interference, shortens the connection path to the first liquid cooling plate 411 and the second liquid cooling assembly 420, reduces pipe bends, and improves the flow efficiency of the cooling medium. The overall structure balances space utilization, safety, and heat dissipation performance.

[0064] Optionally, such as Figure 9 As shown, the partition 120 is provided with a first through hole 122 that communicates with the mounting cavity 121. There are multiple first through holes 122 that correspond one-to-one with the first liquid cooling plate 411. The first through holes 122 extend along the third direction Z and are arranged in a strip shape. The first liquid cooling plate 411 passes through the first through hole 122 and communicates with the liquid inlet manifold 412 and the liquid outlet manifold 413.

[0065] Specifically, the mounting cavity 121 of the partition 120 has multiple first through holes 122 on one side wall facing the battery compartment 101. Each first through hole 122 corresponds to a first liquid cooling plate 411. Each first through hole 122 extends in a long strip along the third direction Z, and its length and width are adapted to the length and width of the first liquid cooling plate 411 so that the first liquid cooling plate 411 can pass through the first through hole 122. The first liquid cooling plate 411 enters the mounting cavity 121 through the corresponding first through hole 122 and is sealed to the liquid inlet manifold 412 and liquid outlet manifold 413 in the cavity. In some embodiments, the partition 120 may be a groove structure with an opening located on the side of the partition 120 facing the electrical compartment 102. The inlet manifold 412 and the outlet manifold 413 are disposed in the groove structure. The plurality of first liquid cooling plates 411, the inlet manifold 412, and the outlet manifold 413 may be an integrated structure that has been assembled as one unit. During assembly, the plurality of first liquid cooling plates 411 are aligned with the first through hole 122, so that the plurality of first liquid cooling plates 411 pass through the first through hole 122 from one side of the electrical compartment 102 into the battery compartment 101, and the inlet manifold 412 and the outlet manifold 413 are fixed in the groove of the partition 120.

[0066] In other embodiments, the partition 120 can be a hollow closed structure. The liquid inlet manifold 412 and the liquid outlet manifold 413 are disposed in the cavity of the closed structure. The first liquid cooling plate 411 passes through the first through hole 122 and is connected to the liquid inlet manifold 412 and the liquid outlet manifold 413. The multiple first liquid cooling plates 411, the liquid inlet manifold 412, and the liquid outlet manifold 413 can be an integrated structure that has been assembled as one unit. During assembly, the side wall opposite to the side wall with the first through hole 122 along the first direction X is not assembled with other parts of the closed structure. The multiple first liquid cooling plates 411 are aligned with the first through hole 122 so that the multiple first liquid cooling plates 411 pass through the first through hole 122 from one side of the electrical compartment 102 into the battery compartment 101. After the liquid inlet manifold 412 and the liquid outlet manifold 413 are fixed in the cavity of the partition 120, the side wall is then sealed and assembled with other parts of the closed structure. Preferably, a small gap can be reserved between the inner wall of the first through hole 122 and the first liquid cooling plate 411 and filled with an elastic sealant, which can ensure that the liquid cooling plate can expand and contract slightly with temperature changes, and prevent the coolant in the mounting cavity 121 from leaking.

[0067] Understandably, when the partition 120 is a hollow closed structure, a second through hole is provided on the side wall opposite to the side wall with the first through hole 122 along the first direction X. The second through hole is used to connect the liquid inlet manifold 412 and the liquid outlet manifold 413 to the liquid inlet main pipe 430 and the liquid outlet main pipe 440 or the second liquid cooling plate 421.

[0068] Understandably, the one-to-one correspondence between the multiple strip-shaped first through holes 122 and the first liquid cooling plate 411 allows each liquid cooling plate to precisely penetrate the partition 120 and connect to the manifold, ensuring the sealing and stability of the cooling medium flow path. The strip-shaped structure of the first through holes 122 extending in the Z-direction provides the first liquid cooling plate 411 with installation and adjustment space in this direction, accommodating assembly errors and thermal expansion and contraction requirements. At the same time, the connection design between the through holes and the mounting cavity 121 allows the connection point between the liquid cooling plate and the manifold to be hidden inside the partition 120, avoiding the occupation of space in the battery compartment 101 or electrical compartment 102, reducing the risk of collision caused by exposed pipes, and improving the overall integration and structural reliability of the liquid cooling system 400.

[0069] Optionally, the enclosure 100 further includes an insulating layer covering the partition 120; and / or, as shown in the image. Figure 1 The single cell 200 shown is a cylindrical cell. The first liquid cooling plate 411 is provided with a recess 4113. Multiple recesses 4113 are provided and spaced apart along the first direction X. The recesses 4113 are matched with the single cell 200.

[0070] Specifically, the outer surface of the partition 120 of the housing 100 is entirely covered with an insulating layer. This insulating layer can be made of high-temperature resistant silicone. This application does not limit the specific material, as long as it is insulating. The insulating layer has a uniform thickness and its edges extend to the connection gap between the partition 120 and the frame 110, forming a complete insulating barrier. Meanwhile, as... Figure 1 As shown, the single cell 200 adopts a cylindrical structure. The first liquid cooling plate 411 in the battery compartment 101 is provided with multiple arc-shaped recesses 4113 along the first direction X. The radius of curvature of the recesses 4113 matches the outer diameter of the cylindrical cell. Adjacent recesses 4113 are arranged at intervals along the first direction X. Each recess 4113 is in close contact with the side of the cylindrical cell, so as to achieve close contact between the liquid cooling plate and the single cell 200.

[0071] Understandably, the insulating layer covering the separator 120 effectively blocks the electrical conduction path between the battery compartment 101 and the electrical compartment 102, reducing the impact of battery leakage or electromagnetic interference on the electrical components 300 and improving the electrical safety of the battery pack. Furthermore, the matching design of the recess 4113 of the first liquid cooling plate 411 with the cylindrical battery increases the contact area between the liquid cooling plate and the individual battery cell 200, making heat dissipation more uniform and efficient, and avoiding heat dissipation dead zones caused by poor local contact in the cylindrical battery.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A battery pack, characterized by, include: The housing (100) has a battery compartment (101) and an electrical compartment (102); A single battery cell (200), wherein multiple single batteries cell (200) are provided, and multiple single batteries cell (200) are provided in the battery compartment (101); An electrical component (300) is electrically connected to the individual battery cell (200) and is disposed within the electrical compartment (102); A liquid cooling system (400) includes a first liquid cooling component (410) and a second liquid cooling component (420), wherein the first liquid cooling component (410) is disposed in the battery compartment (101) and at least a portion of the second liquid cooling component (420) is disposed in the electrical compartment (102); The cavity of the first liquid cooling component (410) is connected to the cavity of the second liquid cooling component (420).

2. The battery pack of claim 1, wherein, The housing (100) has a first direction (X) and a second direction (Y) that are vertically arranged; The first liquid cooling assembly (410) includes a first liquid cooling plate (411), an inlet manifold (412), and an outlet manifold (413); the first liquid cooling plate (411) extends along the first direction (X) and is located in the battery compartment (101); multiple first liquid cooling plates (411) are provided, and multiple first liquid cooling plates (411) are spaced apart along the second direction (Y); multiple single cells (200) arranged along the first direction (X) are provided between two adjacent first liquid cooling plates (411); Both the liquid inlet manifold (412) and the liquid outlet manifold (413) extend along the second direction (Y); the first liquid cooling plate (411) has a first liquid inlet end (4111) and a first liquid outlet end (4112), all of the first liquid inlet ends (4111) are connected to the liquid inlet manifold (412), and all of the first liquid outlet ends (4112) are connected to the liquid outlet manifold (413); The second liquid cooling assembly (420) includes a second liquid cooling plate (421) along the first direction (X), the second liquid cooling plate (421) being located on the side of the liquid outlet manifold (413) away from the first liquid cooling plate (411), and the second liquid cooling plate (421) communicating with at least one of the liquid inlet manifold (412) and the liquid outlet manifold (413).

3. The battery pack of claim 2, wherein, The liquid cooling system (400) also includes an inlet manifold (430) and an outlet manifold (440); The main inlet pipe (430) is connected to the main inlet manifold (412). A portion of the main inlet pipe (430) is located inside the electrical compartment (102), and the main inlet pipe (430) passes through the housing (100). The other portion of the main inlet pipe (430) is located outside the housing (100). The main outlet pipe (440) is connected to the main outlet manifold (413). A portion of the main outlet pipe (440) is located inside the electrical compartment (102), and the main outlet pipe (440) passes through the housing (100). The other portion of the main outlet pipe (440) is located outside the housing (100). The second liquid cooling plate (421) is connected to at least one of the liquid inlet manifold (430) and the liquid outlet manifold (440).

4. The battery pack of claim 3, wherein, The second liquid cooling plate (421) has a second liquid inlet end (4211) and a second liquid outlet end (4212); The second inlet end (4211) and the second outlet end (4212) are both connected to the main inlet pipe (430), or the second inlet end (4211) and the second outlet end (4212) are both connected to the main outlet pipe (440).

5. The battery pack of claim 3, wherein, The second liquid cooling plate (421) has a second liquid inlet end (4211) and a second liquid outlet end (4212). The second liquid inlet end (4211) is connected to the liquid inlet manifold (430), and the second liquid outlet end (4212) is connected to the liquid outlet manifold (440).

6. The battery pack of claim 5, wherein, The second liquid cooling plate (421) is bent and is connected between the liquid inlet manifold (430) and the liquid outlet manifold (440) in the second direction (Y).

7. The battery pack according to claim 2, characterized in that, The liquid cooling system (400) further includes a main inlet pipe (430), a part of which is located inside the electrical compartment (102), the main inlet pipe (430) passes through the housing (100), and the other part of which is located outside the housing (100). The inlet manifold (412) is connected to the main inlet pipe (430). The second liquid cooling plate (421) has a second inlet end (4211) and a second outlet end (4212). The second inlet end (4211) is connected to the outlet manifold (413). The second liquid cooling plate (421) passes through the housing (100), and the second outlet end (4212) is located outside the housing (100). Alternatively, the liquid cooling system (400) may further include a main outlet pipe (440), a portion of which is located inside the electrical compartment (102), the main outlet pipe (440) passing through the housing (100), and the other portion of which is located outside the housing (100). The main outlet pipe (440) is connected to the outlet manifold (413). The second liquid cooling plate (421) has a second inlet end (4211) and a second outlet end (4212). The second liquid cooling plate (421) passes through the housing (100), the second inlet end (4211) is located outside the housing (100), and the second outlet end (4212) is connected to the inlet manifold (412).

8. The battery pack according to any one of claims 2-7, characterized in that, The housing (100) also has a third direction (Z) that is perpendicular to both the first direction (X) and the second direction (Y). The housing (100) includes a frame (110) and a partition (120), the partition (120) being connected to the frame (110), and the battery compartment (101) and the electrical compartment (102) being located on opposite sides of the partition (120) in the first direction (X); The partition (120) is provided with an installation cavity (121), and the liquid inlet manifold (412) and the liquid outlet manifold (413) are both disposed in the installation cavity (121), and the liquid inlet manifold (412) is located on the side of the liquid outlet manifold (413) in the third direction (Z).

9. The battery pack according to claim 8, characterized in that, The partition (120) is provided with a first through hole (122) communicating with the mounting cavity (121); The first through hole (122) is provided in multiple ways, and each of the multiple first through holes (122) corresponds to the first liquid cooling plate (411). The first through hole (122) extends along the third direction (Z) and is arranged in a strip shape. The first liquid cooling plate (411) passes through the first through hole (122) and is connected to the liquid inlet manifold (412) and the liquid outlet manifold (413).

10. The battery pack according to claim 8, characterized in that, The housing (100) also includes an insulating layer that covers the partition (120); And / or, the single cell (200) is a cylindrical cell, the first liquid cooling plate (411) is provided with a recess (4113), the recess (4113) is provided in multiple and is spaced apart along the first direction (X), and the recess (4113) matches the single cell (200).

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