Cooling system and battery pack

Abstract

The application provides a cooling system and a battery pack. The battery pack comprises a box body and a plurality of battery groups. Each battery group comprises a plurality of battery cells. The cooling system comprises: a heat exchange structure having a heat exchange flow channel for heat exchange with the plurality of battery groups. The heat exchange flow channel is provided with a branch flow port and a converging flow port. A plurality of heat exchange partitions are arranged in a receiving space of the box body. Each heat exchange partition forms a heat exchange passage inside. A flow guide assembly connects the branch flow port, the converging flow port and the plurality of heat exchange passages, so that the heat exchange medium flows between the heat exchange flow channel and the heat exchange passage through the flow guide assembly. The heat exchange structure and the plurality of heat exchange partitions surround the mounting space to mount the flow guide assembly. The flow guide assembly simplifies the pipeline layout, reduces the connection points, reduces the risk of leakage, and facilitates the overall design and installation of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to cooling systems and battery packs. Background Technology

[0002] Battery packs generate a significant amount of heat during operation. If this heat is not dissipated effectively and promptly, the battery temperature will become excessively high, affecting battery performance, lifespan, and even posing safety hazards. Therefore, an efficient battery cooling system is crucial for ensuring the stable operation of the battery pack.

[0003] In related technologies, some liquid cooling solutions involve setting up independent cooling baffles between battery packs and connecting each baffle to an external cooling channel individually. While this method can achieve a certain cooling effect, the large number of pipes and complex layout make installation inconvenient. Utility Model Content

[0004] The embodiments of this application provide a cooling system and battery pack that reduce the number of pipes and connection points, optimize the pipe layout, and facilitate the overall design and installation of the battery pack.

[0005] In a first aspect, embodiments of this application provide a cooling system for a battery pack, the battery pack including a housing and multiple battery groups, each battery group including multiple cells, the cooling system including: a heat exchange structure for being disposed on one side of the multiple battery groups and having a heat exchange channel for heat exchange with the multiple battery groups, the heat exchange channel having a branch port and a confluence port; multiple heat exchange partitions for being disposed within the accommodating space of the housing and for dividing the accommodating space along a first direction into multiple accommodating cavities for installing the multiple battery groups, each heat exchange partition forming a heat exchange channel inside for heat exchange with the corresponding battery group; and a flow guiding assembly for being disposed within the accommodating space (101) of the housing (100) and connecting the branch port, the confluence port and the multiple heat exchange channels, so that the heat exchange medium flows between the heat exchange channels through the flow guiding assembly.

[0006] The flow guide component simplifies the pipeline layout, reduces connection points, lowers the risk of leakage, and facilitates the overall design and installation of the battery pack.

[0007] Optionally, the heat exchange channel of the heat exchanger is provided with a medium inlet and a medium outlet; multiple heat exchangers are divided into at least two heat exchange groups, the at least two heat exchange groups include an upstream heat exchange group and a downstream heat exchange group; wherein, the heat exchange medium is used to flow through the flow guiding component, sequentially through the branch port of the heat exchange channel, the medium inlet of the upstream heat exchange group, the medium outlet of the upstream heat exchange group, the medium inlet of the downstream heat exchange group, the medium outlet of the downstream heat exchange group, and the confluence port of the heat exchange channel.

[0008] The series flow path design ensures that the temperature and flow rate of the heat exchange medium are relatively uniform in each heat exchange group, thereby improving the uniformity of cooling of the battery modules in the battery pack.

[0009] Optionally, the flow guiding component includes: a branch pipe connecting the branch port to the medium inlet of the upstream heat exchanger; a junction pipe connecting the junction port to the medium outlet of the downstream heat exchanger; and a series pipe connecting the medium outlet of the upstream heat exchanger to the medium inlet of the downstream heat exchanger.

[0010] By constructing flow guiding components through branch pipes, confluence pipes, and series pipes, flexible planning of the flow path of the heat exchange medium can be achieved, improving the adaptability of the cooling system to different battery pack layouts.

[0011] Optionally, the series pipe is located on one side of the branch pipe and the junction pipe; the series pipe is arranged to bypass the two adjacent heat exchange partitions in the upstream heat exchange group and the downstream heat exchange group.

[0012] Series pipes are installed around adjacent heat exchange insulation components, which facilitates the installation and maintenance of series pipes, manifold pipes, and branch pipes.

[0013] Optionally, within the same heat exchange group, the medium inlet of the heat exchanger is connected to the branch pipe or the upstream series pipe through the group distribution pipe; the medium outlet of the heat exchanger is connected to the manifold pipe or the downstream series pipe through the group collection pipe.

[0014] The design of the internal distribution pipe and internal collection pipe ensures that each heat exchanger can obtain an appropriate amount of heat exchange medium, avoiding uneven distribution and ensuring that each heat exchanger can fully exert its cooling effect.

[0015] Optionally, the distribution pipe and the collection pipe within the group are each provided with multiple first connection parts along their length; the medium inlet and medium outlet of the heat exchanger are respectively provided with second connection parts that correspond to and cooperate with the first connection parts;

[0016] A detachable sealed connection is formed between the first connecting part and the second connecting part to achieve fluid communication between the medium inlet of the distribution pipe and the heat exchanger, and between the medium outlet of the collection pipe and the heat exchanger.

[0017] The detachable sealed connection design makes the assembly and disassembly of the distribution pipes, collection pipes and heat exchange insulation components within the group extremely convenient, reducing maintenance costs and difficulty.

[0018] Optionally, the distribution pipe within the group is detachably connected to the upstream pipe via an adapter; and / or, the collection pipe within the group is detachably connected to the downstream pipe via an adapter; wherein the upstream pipe is a branch pipe or an upstream series pipe; and the downstream pipe is a confluence pipe or a downstream series pipe.

[0019] The use of adapters enables detachable connections, simplifying the installation and disassembly process of the cooling system, improving installation efficiency, and reducing maintenance costs and difficulties.

[0020] Optionally, the heat exchange structure is at least one of the bottom plate, top plate, and side beams of the box.

[0021] By setting the heat exchange structure as at least one of the bottom plate, top plate, and side beams of the housing, the structural space of the housing itself is fully utilized, thereby improving the energy density of the battery pack.

[0022] Optionally, a portion of the heat exchange structure extends to the outside of the housing to form an extension; the extension has a total inlet and a total outlet, both of which are connected to the heat exchange flow channel.

[0023] By placing the extension of the heat exchange structure outside the housing and integrating the main inlet and outlet here, the connection and disassembly of the external cooling system and the heat exchange channels inside the battery pack are made more convenient, thus improving the system's integration.

[0024] Secondly, embodiments of this application provide a battery pack, including: a housing with an accommodating space; a plurality of battery packs arranged sequentially in the accommodating space along a first direction; and a cooling system as described above.

[0025] Since the cooling system includes any of the above embodiments, it has the effects of any of the above embodiments, such as improved cooling efficiency and ease of installation and maintenance.

[0026] Optionally, multiple heat exchange components are divided into at least two heat exchange groups, including an upstream heat exchange group and a downstream heat exchange group. The heat exchange medium is used to flow through the diversion port, the upstream heat exchange group, the downstream heat exchange group, and the confluence port in sequence via the flow guiding component. The housing is provided with a first structural beam within the accommodating space, and the first structural beam is located between the upstream heat exchange group and the downstream heat exchange group.

[0027] The first structural beam provides additional structural support for the enclosure and also acts as an anti-expansion beam, improving the structural strength and stability of the entire battery pack.

[0028] Optionally, the housing has a second structural beam extending along the first direction within the accommodating space. The second structural beam is located on one side of the battery pack along the second direction that intersects with the first direction. The second structural beam is used to limit the battery pack and the heat exchange insulation.

[0029] The second structural beam provides restraint for the battery pack and heat exchange insulation components. At the same time, as an anti-expansion beam, it works in conjunction with the housing and other structural beams to form a stable overall structural frame.

[0030] Optionally, the second structural beam is provided with a plurality of clearance structures at intervals along the first direction, and the clearance structures pass through the opposite sides of the second structural beam; the heat exchange insulation extends through the clearance structures to the side of the second structural beam away from the battery pack and communicates with the flow guiding assembly.

[0031] The clearance structure provides a positioning part for the heat exchanger, which simplifies the assembly process, improves assembly efficiency, and facilitates quick positioning of the connection parts for inspection, repair or replacement, thereby improving maintenance efficiency.

[0032] The beneficial effects of the embodiments of this application are as follows:

[0033] In the embodiments of this application, by setting a flow guiding component, the heat exchange channel of the housing and the heat exchange channels of multiple heat exchange partitions are connected only through two interfaces, the branch port and the junction port. This reduces the number of pipes and connection points, optimizes the pipe layout, facilitates the overall design and installation of the battery pack, and reduces the risk of leakage that may occur due to too many pipes. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments 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.

[0035] Figure 1 This is a perspective view of the battery pack provided in the embodiments of this application;

[0036] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0037] Figure 3 This is an exploded view of the battery pack provided in an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of the connection structure between the heat exchange insulation component and the flow guiding component provided in the embodiments of this application;

[0039] Figure 5 This is a schematic diagram of the connection structure between the heat exchange insulation component and the internal distribution pipe and internal collection pipe provided in the embodiments of this application;

[0040] Figure 6 This is a cross-sectional schematic diagram of the heat exchange structure provided in the embodiments of this application when it is used as a base plate;

[0041] Figure 7 This is a cross-sectional schematic diagram of the heat exchanger provided in the embodiments of this application.

[0042] In the picture: 10. Battery pack;

[0043] 100. Box body; 101. Accommodation space; 102. First structural beam; 103. Second structural beam; 104. Clearance structure;

[0044] 110. Heat exchange structure; 111. Heat exchange channel; 112. Flow branch; 113. Flow junction; 114. Extension; 115. Main inlet; 116. Main outlet;

[0045] 120. Heat exchanger insulation; 121. Heat exchange passage; 122. Medium inlet; 123. Medium outlet; 125. Intra-group distribution pipe; 126. Intra-group collection pipe; 127. First connection part; 1271. Insertion pipe; 128. Second connection part; 1281. Socket pipe; 129. Adapter joint;

[0046] 130. Flow guiding component; 131. Flow branching pipe; 132. Flow combining pipe; 133. Series pipe;

[0047] 200. Battery pack. Detailed Implementation

[0048] 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 the 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. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0049] In related technologies, some liquid cooling solutions involve setting up independent cooling baffles between battery packs and connecting each baffle to an external cooling channel individually. While this method can achieve a certain cooling effect, the large number of pipes and complex layout make installation inconvenient.

[0050] Regarding the above technical issues, firstly, refer to Figure 1 , Figure 3 , Figure 6This application provides a cooling system for a battery pack. The battery pack includes a housing 100 and multiple battery groups 200. Each battery group 200 includes multiple battery cells. The cooling system includes: a heat exchange structure 110 disposed on one side of the multiple battery groups 200 and having a heat exchange channel 111 for heat exchange with the multiple battery groups 200. The heat exchange channel has a branch port 112 and a confluence port 113; and multiple heat exchange spacers 120 disposed within the accommodating space 101 of the housing 100 and used for... The accommodating space 101 is divided into multiple accommodating cavities along the first direction x to install multiple battery packs 200. Each heat exchange partition 120 forms a heat exchange channel 121 inside to exchange heat with the corresponding battery pack 200. A flow guiding assembly 130 is provided in the accommodating space (101) of the housing (100) and connects the branch port 112, the confluence port 113 and the multiple heat exchange channels 121 so that the heat exchange medium flows between the heat exchange channel 111 and the heat exchange channel 121 through the flow guiding assembly 130.

[0051] Understandably, during cooling, the heat exchange medium first enters the heat exchange channel 111 of the heat exchange structure 110. Under the action of the flow guiding component 130, the heat exchange medium is distributed from the branch port 112 to the heat exchange channels 121 of each heat exchange partition 120. Since the heat exchange partition 120 is in direct contact with the battery pack 200, the heat exchange medium in the heat exchange channel 121 can exchange heat with the battery pack 200, absorb the heat generated by the battery pack 200, and achieve cooling of the battery pack 200.

[0052] After absorbing heat, the temperature of the heat exchange medium rises. Guided by the flow guiding component 130, the heat exchange medium gathers from each heat exchange channel 121 to the confluence port 113 of the heat exchange structure 110, and then flows back to the heat exchange channel 111, forming a cycle. In this process, the heat exchange partition 120 directly uses the cooling medium of the heat exchange channel 111 of the housing 100, without the need for an additional cold source, and relies on the circulation power of the heat exchange medium itself to achieve continuous cooling of the battery pack 200.

[0053] In this embodiment, by setting the flow guiding component 130, the heat exchange channel 111 of the housing 100 and the heat exchange channels 121 of the multiple heat exchange partitions 120 are connected only through two interfaces: the branch port 112 and the confluence port 113. Compared with the method in related technologies where each heat exchange partition 120 is individually connected to the heat exchange channel 111, this embodiment reduces the number of pipes and connection points, optimizes the pipe layout, thereby facilitating the overall design and installation of the battery pack, and also reducing the risk of leakage that may occur due to excessive pipes.

[0054] Furthermore, since the heat exchanger 120 directly uses the cooling medium of the heat exchange channel 111 in the housing, no additional cold source is required, reducing the number of components in the cooling system and lowering material and manufacturing costs. In addition, the optimized piping layout saves space inside the battery pack, allowing more battery packs 200 or other functional components to be arranged in a limited space, thus improving the space utilization of the battery pack.

[0055] In some embodiments, reference Figure 4 , Figure 5 , Figure 7 The heat exchange channel 121 of the heat exchange partition 120 is provided with a medium inlet 122 and a medium outlet 123; the multiple heat exchange partitions 120 are divided into at least two heat exchange groups, which include an upstream heat exchange group and a downstream heat exchange group; wherein, the heat exchange medium is used to flow through the flow guiding component 130, sequentially through the branch port 112 of the heat exchange channel, the medium inlet 122 of the upstream heat exchange group, the medium outlet 123 of the upstream heat exchange group, the medium inlet 122 of the downstream heat exchange group, the medium outlet 123 of the downstream heat exchange group, and the confluence port 113 of the heat exchange channel.

[0056] This embodiment employs a series flow path design, allowing the heat exchange medium to flow sequentially through each heat exchange group, ensuring relatively uniform temperature and flow rate of the heat exchange medium in each heat exchange group. Compared to parallel flow paths in related technologies, the series flow path avoids the problem of poor cooling effect of some heat exchange partitions 120 due to uneven distribution of the heat exchange medium, resulting in a more consistent cooling environment for each battery pack 200 and effectively improving the uniformity of battery pack cooling within the battery pack.

[0057] In some embodiments, reference Figure 4 , Figure 5 , Figure 7 The flow guiding component 130 includes: a branch pipe 131 that connects the branch port 112 to the medium inlet 122 of the upstream heat exchange group; a confluence pipe 132 that connects the confluence port 113 to the medium outlet 123 of the downstream heat exchange group; and a series pipe 133 that connects the medium outlet 123 of the upstream heat exchange group to the medium inlet 122 of the downstream heat exchange group.

[0058] Understandably, the heat exchange medium first enters the heat exchange channel 111 of the heat exchange structure 110. In the flow guiding assembly 130, the diversion pipe 131 connects the diversion port 112 of the heat exchange structure 110 with the medium inlet 122 of the upstream heat exchange group. The heat exchange medium can flow from the heat exchange channel 111 into the upstream heat exchange group through the diversion pipe 131, thus achieving the initial distribution of the heat exchange medium.

[0059] After entering the upstream heat exchange group, the heat exchange medium enters the heat exchange channel 121 through the medium inlet 122 of the heat exchange partition 120. Within the heat exchange channel 121, it exchanges heat with the battery pack 200, absorbing the heat generated by the battery pack 200. A series pipe 133 connects the medium outlet 123 of the upstream heat exchange group to the medium inlet 122 of the downstream heat exchange group, creating a series flow path for the heat exchange medium between the heat exchange groups. That is, after completing heat exchange in one heat exchange group, the heat exchange medium flows out from the medium outlet 123 of that heat exchange group and enters the next heat exchange group through the series pipe 133 to continue heat exchange, and so on, achieving sequential cooling of multiple heat exchange groups.

[0060] After a series of heat exchanges, the heat exchange medium flows out from the medium outlet 123 of the last heat exchange group. At this time, the manifold 132 in the flow guiding component 130 connects the manifold 113 of the heat exchange structure 110 with the medium outlet 123 of the last heat exchange group, so that the heat exchange medium can flow back to the heat exchange channel 111 of the heat exchange structure 110 through the manifold 132 to complete a complete cycle, thereby continuously cooling the battery pack.

[0061] In this embodiment, by dividing multiple heat exchange partitions 120 into at least two heat exchange groups and constructing a flow guiding assembly 130 using a branch pipe 131, a confluence pipe 132, and a series pipe 133, flexible planning of the heat exchange medium flow path is achieved. That is, based on the distribution of battery packs 200 within the battery pack, the distribution and flow sequence of the heat exchange medium between different heat exchange groups can be controlled by adjusting the pipe connections, thereby improving the adaptability of the cooling system to different battery pack 200 layouts and ensuring that each battery pack 200 receives effective cooling.

[0062] Furthermore, the grouped series cooling system design in this embodiment optimizes the structure while ensuring cooling performance. Compared to related technologies where each heat exchanger 120 is individually connected to the heat exchange channel 111, this reduces the number and complexity of pipes, lowering system manufacturing costs and installation difficulty. Simultaneously, it saves internal space in the battery pack, improving space utilization.

[0063] In some embodiments, the series pipe 133 is located on one side of the branch pipe 131 and the junction pipe 132; the series pipe 133 is arranged to bypass the area between two adjacent heat exchange partitions 120 in the upstream heat exchange group and the downstream heat exchange group.

[0064] In this embodiment, by setting the series pipe 133, the manifold pipe 132, and the branch pipe 131 on the same side, and by setting the series pipe 133 around the two adjacent heat exchange partitions 120 in the upstream heat exchange group and the downstream heat exchange group, the installation and maintenance of the series pipe 133, the manifold pipe 132, and the branch pipe 131 are facilitated.

[0065] In some embodiments, reference Figure 2 , Figure 4 Within the same heat exchange group, the medium inlet 122 of the heat exchange partition 120 is connected to the branch pipe 131 or the upstream series pipe 133 through the group distribution pipe 125, and the medium outlet 123 of the heat exchange partition 120 is connected to the confluence pipe 132 or the downstream series pipe 133 through the group collection pipe 126.

[0066] Understandably, after the heat exchange medium flows out from the branch port 112 of the heat exchange structure 110, it is transported through the branch pipe 131. For a certain heat exchange group, if it is the first heat exchange group to receive the heat exchange medium, the heat exchange medium in the branch pipe 131 is distributed to the medium inlet 122 of each heat exchange partition 120 in the heat exchange group through the group distribution pipe 125; if the heat exchange group is not the first heat exchange group to receive the medium, but is located in the middle or end of the series flow path, then the heat exchange medium in the upstream series pipe 133 will be distributed to the medium inlet 122 of each heat exchange partition 120 in the heat exchange group through the group distribution pipe 125.

[0067] After heat exchange, the heat exchange medium flows out from the medium outlet 123 of the heat exchange partition 120. For a certain heat exchange group, if it is the last heat exchange group, the collection pipe 126 in the group collects the heat exchange medium flowing out of each heat exchange partition 120 in the heat exchange group, and then flows back to the manifold 113 of the heat exchange structure 110 through the manifold 132 to complete a complete cycle; if the heat exchange group is not the last heat exchange group, the collection pipe 126 in the group will collect the heat exchange medium flowing out of each heat exchange partition 120 in the heat exchange group, and then transport it to the next heat exchange group through the downstream series pipe 133 to continue heat exchange and circulation.

[0068] In this embodiment, since the heat exchanger elements 120 were previously grouped, the distribution pipe 125 within each group only needs to distribute the heat exchange medium to a small number of heat exchanger elements 120 within the same heat exchanger group, instead of directly distributing it to all heat exchanger elements 120 as in related technologies. This design ensures that each heat exchanger element 120 receives an appropriate amount of heat exchange medium, effectively avoiding the problem of uneven heat exchange medium distribution caused by excessively long distribution pipes or too many branches. This ensures that each heat exchanger element 120 can fully exert its cooling effect, resulting in uniform cooling of all parts of the battery pack 200 and improving the overall cooling effect of the battery pack.

[0069] In some embodiments, reference Figure 2 , Figure 4 , Figure 5Each of the group distribution pipe 125 and the group collection pipe 126 is provided with a plurality of first connecting parts 127 along its length; the medium inlet 122 and the medium outlet 123 of the heat exchange insulation 120 are respectively provided with second connecting parts 128 that correspond to and cooperate with the first connecting parts 127; a detachable sealed connection is formed between the first connecting parts 127 and the second connecting parts 128 to realize fluid communication between the group distribution pipe 125 and the medium inlet 122 of the heat exchange insulation 120, and fluid communication between the group collection pipe 126 and the medium outlet 123 of the heat exchange insulation 120.

[0070] Understandably, the intra-group distribution pipe 125 and the intra-group collection pipe 126 each have multiple first connecting portions 127 along their length. For example, the intra-group distribution pipe 125 and the intra-group collection pipe 126 are arranged intermittently, with two first connecting portions 127 formed at each discontinuity. At the same time, the medium inlet 122 and the medium outlet 123 of the heat exchanger 120 are respectively provided with second connecting portions 128 that correspond to and cooperate with the first connecting portions 127.

[0071] During the assembly of the cooling system, the first connecting part 127 and the second connecting part 128 are mated together to form a detachable sealed connection, achieving fluid communication between the internal distribution pipe 125 and the medium inlet 122 of the heat exchanger 120. Similarly, the internal collection pipe 126 and the medium outlet 123 of the heat exchanger 120 are detachably sealed together via the first connecting part 127 and the second connecting part 128, achieving fluid communication between the internal collection pipe 126 and the medium outlet 123 of the heat exchanger 120.

[0072] In this embodiment, the detachable sealed connection formed between the first connecting part 127 and the second connecting part 128 makes the assembly and disassembly of the group distribution pipe 125, the group collection pipe 126 and the heat exchange partition 120 extremely convenient, reducing maintenance costs and difficulties.

[0073] Furthermore, the connection structure of this embodiment provides convenient conditions for upgrading and expanding the cooling system. When it is necessary to add heat exchanger 120 to improve cooling capacity, it is only necessary to add the first connection part 127 at the appropriate position of the group distribution pipe 125 and the group collection pipe 126, and install the corresponding heat exchanger 120, without making major adjustments to the architecture of the entire cooling system.

[0074] In some embodiments, reference Figure 5 The second connection portion 128 includes a socket tube 1281, which is disposed at the medium inlet 122 and the medium outlet 123 of the heat exchanger 120 and extends toward the adjacent heat exchanger 120 along the first direction x; the first connection portion 127 includes a plug tube 1271, which is plugged into and sealed with the socket tube 1281.

[0075] Understandably, the socket tube 1281 extends along the first direction x toward the adjacent heat exchanger 120, and its extension direction and position are designed to accurately mate with the corresponding socket tube 1281 on the group distribution tube 125 or the group collection tube 126.

[0076] When assembling the cooling system, ensure that the insertion pipe 1271 on the distribution pipe 125 is accurately inserted into the socket pipe 1281 at the medium inlet 122 of the heat exchanger 120. Similarly, insert the insertion pipe 1271 on the collection pipe 126 into the socket pipe 1281 at the medium outlet 123 of the heat exchanger 120. Excellent sealing performance can be achieved by precisely designing the dimensions and shapes of the socket pipe 1281 and the insertion pipe 1271, and by employing appropriate sealing measures at the joint, such as applying sealant.

[0077] In this embodiment, the socket pipe 1281 and the plug pipe 1271 are connected by a plug-in sealing method. On the one hand, this can achieve excellent sealing performance and avoid heat exchange medium leakage caused by connection problems. On the other hand, the socket structure connection method makes the installation and disassembly of the group distribution pipe 125, the group collection pipe 126 and the heat exchange partition 120 very convenient, thus improving maintenance efficiency.

[0078] In some embodiments, reference Figure 4 The distribution pipe 125 within the group is detachably connected to the upstream pipe via an adapter 129; and / or, the collection pipe 126 within the group is detachably connected to the downstream pipe via an adapter 129. The upstream pipe is either a branch pipe 131 or an upstream series pipe 133; the downstream pipe is either a confluence pipe 132 or a downstream series pipe 133.

[0079] In this embodiment, an adapter 129 is used to achieve detachable connections between the group distribution pipe 125 and the upstream pipe, and between the group collection pipe 126 and the downstream pipe, simplifying the installation and disassembly process of the cooling system. During installation, simply connect both ends of the adapter 129 to the corresponding pipes, quickly completing the connection and improving installation efficiency. When maintenance, repair, or component replacement of the cooling system is required, the group distribution pipe 125 and the group collection pipe 126 can be easily separated from the upstream and downstream pipes simply by disassembling the adapter 129, reducing maintenance costs and difficulty.

[0080] In some embodiments, reference Figure 1 , Figure 3 The heat exchange structure 110 is at least one of the bottom plate, top plate, and side beams of the box body 100.

[0081] In this embodiment, the heat exchange structure 110 is set as at least one of the bottom plate, top plate, and side beams of the housing 100, making full use of the structural space of the housing 100 itself. For example, by using the bottom plate as the heat exchange structure 110, the heat exchange structure 110 can directly or through a heat-conducting medium contact the bottom of the battery cell, thereby quickly receiving heat from inside the battery pack. It is not necessary to allocate a separate space for installing heat exchange components inside the battery pack, thus allowing more battery cells to be arranged in a limited space, improving the energy density of the battery pack.

[0082] In some embodiments, reference Figure 6 A portion of the heat exchange structure 110 extends to the outside of the housing 100, forming an extension 114; the extension 114 is provided with a total inlet 115 and a total outlet 116, both of which are connected to the heat exchange channel 111.

[0083] In this embodiment, the extension 114 of the heat exchange structure 110 is disposed outside the housing 100, and the total inlet 115 and the total outlet 116 are integrated here, making it easier to connect and disconnect the external cooling system from the heat exchange channel 111 inside the battery pack, reducing the need for additional piping inside the housing 100, improving the system integration, and making the structure of the entire battery pack more compact.

[0084] In some embodiments, reference Figure 3 , Figure 4 The heat exchanger 120 has a plate-like structure; the two sides of the heat exchanger 120 in the thickness direction are in thermal contact with the battery pack 200, or one side of the heat exchanger 120 in the thickness direction is in thermal contact with the battery pack 200, and the other side is in thermal contact with the inner wall of the housing 100.

[0085] In this embodiment, the heat exchanger 120 adopts a plate-like structure with a large surface area. When it makes thermal contact with the battery pack 200, it can have a more sufficient contact area with the battery pack 200, thereby absorbing the heat generated by the battery pack 200 more quickly.

[0086] In addition, the plate-shaped heat exchanger 120 can be conveniently installed between the battery packs 200 or between the battery packs 200 and the inner wall of the housing 100. Its flat shape can adapt well to the internal spatial layout of the battery pack, so that the battery packs 200 can be arranged more closely together, reducing the empty area inside the battery pack.

[0087] Secondly, refer to Figure 1 , Figure 3 This application provides a battery pack 10, including: a housing 100 with a accommodating space 101; a plurality of battery packs 200 arranged sequentially in the accommodating space 101 along a first direction x; and a cooling system as described in any of the above embodiments.

[0088] Since the battery pack 10 of this embodiment includes the cooling system of any of the above embodiments, it has the effects of any of the above embodiments.

[0089] In some embodiments, reference Figure 2 , Figure 3 Multiple heat exchange partitions 120 are divided into at least two heat exchange groups, including an upstream heat exchange group and a downstream heat exchange group. The heat exchange medium is used to flow through the flow guiding assembly 130, sequentially passing through the diversion port 112, the upstream heat exchange group, the downstream heat exchange group, and the confluence port 113. The housing 100 is provided with a first structural beam 102 in the accommodating space 101, and the first structural beam 102 is located between the upstream heat exchange group and the downstream heat exchange group.

[0090] In this embodiment, the first structural beam 102 extends along the second direction y and is disposed within the accommodating space 101 of the housing 100, providing additional structural support for the housing 100. Furthermore, the first structural beam 102 can also serve as an anti-expansion beam; when the battery pack is subjected to external impact or expansion, the first structural beam 102 can disperse and bear part of the force, thereby improving the structural strength and stability of the entire battery pack.

[0091] In some embodiments, reference Figure 3 The housing 100 has at least one second structural beam 103 extending along the first direction x within the accommodating space 101. The second structural beam 103 is disposed on one side of the battery pack 200 along the second direction y that intersects with the first direction x. The second structural beam 103 is used to limit the battery pack 200 and the heat exchanger 120.

[0092] In this embodiment, the second structural beam 103 is disposed on one side of the battery pack 200 along the second direction y, providing a limit for the battery pack 200 and the heat exchanger 120. Furthermore, the second structural beam 103 can also serve as an anti-expansion beam, cooperating with the housing 100 and other structural beams to form a stable overall structural frame.

[0093] In some embodiments, reference Figure 2 , Figure 3 The second structural beam 103 is provided with a plurality of clearance structures 104 at intervals along the first direction x, and the clearance structures 104 penetrate through the opposite sides of the second structural beam 103; the heat exchange insulation 120 extends through the clearance structures 104 to the side of the second structural beam 103 away from the battery pack 200, and communicates with the flow guiding assembly 130 provided on that side.

[0094] In this embodiment, the connection points of all heat exchanger components 120 and flow guiding components 130 are integrated into the avoidance structure 104 extending to the side of the second structural beam 103 opposite to the battery pack 200. This integrated design allows for connection operations of the heat exchanger components 120 and flow guiding components 130 only in this specific area during installation, eliminating the need for dispersed connections at different parts of the battery pack. This simplifies the installation process and reduces installation time and labor costs. During maintenance, it also facilitates quick location of the connection points for inspection, repair, or replacement, improving maintenance efficiency and reducing maintenance difficulty and costs.

[0095] In addition, multiple clearance structures 104 provide positioning parts for the heat exchanger 120. During the battery pack assembly process, the heat exchanger 120 can be positioned simply by passing through the corresponding clearance structure 104, which simplifies the assembly process and improves assembly efficiency.

[0096] In some embodiments, the heat exchanger 120 is bonded to the inner wall of the battery pack 200 and / or the housing 100.

[0097] In this embodiment, the adhesive layer formed by the thermally conductive adhesive provides a fixing effect, tightly adhering the heat exchanger 120 to the inner wall of the battery pack 200 and / or the housing 100. On the other hand, the thermally conductive adhesive can quickly transfer the heat generated by the battery pack 200 to the heat exchanger 120 and the heat exchange structure 110.

[0098] Thirdly, embodiments of this application provide a method for installing a battery pack 10, comprising the following steps:

[0099] S1: The heat exchanger 120 is spliced ​​with multiple battery packs 200 to form a battery assembly, so that the heat exchanger 120 and the battery pack 200 can achieve close thermal contact.

[0100] S2: Place the assembled battery assembly into the housing 100.

[0101] Compared to fixing the heat exchanger 120 inside the housing 100 first and then placing the battery pack 200, the assembly method of this embodiment allows for a more precise fit between the heat exchanger 120 and the battery pack 200, reducing gaps between modules and between modules and the heat exchanger 120. Furthermore, assembling the heat exchanger 120 and the battery pack 200 as a whole reduces the steps of separately installing the heat exchanger 120 inside the housing 100 and placing the battery packs 200 one by one, simplifying the assembly process and improving assembly efficiency.

[0102] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A cooling system for a battery pack, the battery pack comprising a housing (100) and a plurality of battery packs (200), each of the battery packs (200) comprising a plurality of battery cells, characterized in that, The cooling system includes: A heat exchange structure (110) is provided on one side of a plurality of battery packs (200) and has a heat exchange channel (111) for heat exchange with the plurality of battery packs (200), the heat exchange channel (111) being provided with a branch port (112) and a confluence port (113). Multiple heat exchange partitions (120) are provided in the accommodating space (101) of the housing (100) and are used to divide the accommodating space (101) into multiple accommodating cavities along a first direction (x) to install multiple battery packs (200). Each heat exchange partition (120) forms a heat exchange channel (121) inside to exchange heat with the corresponding battery pack (200). A flow guiding assembly (130) is provided in the accommodating space (101) of the housing (100). The flow guiding assembly (130) connects the branch port (112), the confluence port (113) and the plurality of heat exchange channels (121) so that the heat exchange medium flows between the heat exchange channel (111) and the heat exchange channel (121) through the flow guiding assembly (130).

2. The cooling system according to claim 1, characterized in that, The heat exchange channel (121) of the heat exchange insulation (120) is provided with a medium inlet (122) and a medium outlet (123); The plurality of heat exchange partitions (120) are divided into at least two heat exchange groups, the at least two heat exchange groups including an upstream heat exchange group and a downstream heat exchange group; The heat exchange medium is used to flow through the flow guiding assembly (130) sequentially through the branch port (112) of the heat exchange channel (111), the medium inlet (122) of the upstream heat exchange group, the medium outlet (123) of the upstream heat exchange group, the medium inlet (122) of the downstream heat exchange group, the medium outlet (123) of the downstream heat exchange group, and the confluence port (113) of the heat exchange channel.

3. The cooling system according to claim 2, characterized in that, The flow guiding component (130) includes: A diversion pipe (131) connects the diversion port (112) to the medium inlet (122) of the upstream heat exchange unit; The manifold (132) connects the manifold (113) to the medium outlet (123) of the downstream heat exchange unit; A series pipe (133) connects the medium outlet (123) of the upstream heat exchange group to the medium inlet (122) of the downstream heat exchange group.

4. The cooling system according to claim 3, characterized in that, The series pipe (133) is located on one side of the branch pipe (131) and the confluence pipe (132); the series pipe (133) is arranged to bypass the area between two adjacent heat exchange partitions (120) in the upstream heat exchange group and the downstream heat exchange group.

5. The cooling system according to claim 3, characterized in that, Within the same heat exchange group, the medium inlet (122) of the heat exchange partition (120) is connected to the branch pipe (131) or the series pipe (133) through the group distribution pipe (125); the medium outlet (123) of the heat exchange partition (120) is connected to the confluence pipe (132) or the series pipe (133) through the group collection pipe (126).

6. The cooling system according to claim 5, characterized in that, The group distribution pipe (125) and the group collection pipe (126) are each provided with a plurality of first connecting parts (127) along the length direction; The heat exchanger (120) has a medium inlet (122) and a medium outlet (123) respectively provided with a second connecting part (128) that corresponds to and cooperates with the first connecting part (127); A detachable sealed connection is formed between the first connecting part (127) and the second connecting part (128) to achieve fluid communication between the group distribution pipe (125) and the medium inlet (122) of the heat exchanger (120), and fluid communication between the group collection pipe (126) and the medium outlet (123) of the heat exchanger (120).

7. The cooling system according to claim 5, characterized in that, The group distribution pipe (125) is detachably connected to the upstream pipe via an adapter (129); and / or, the group collection pipe (126) is detachably connected to the downstream pipe via an adapter (129); The upstream pipeline is either the branch pipeline (131) or the series pipeline (133); the downstream pipeline is either the confluence pipeline (132) or the series pipeline (133).

8. The cooling system according to any one of claims 1 to 7, characterized in that, The heat exchange structure (110) is at least one of the bottom plate, top plate, and side beams of the box body (100).

9. The cooling system according to claim 8, characterized in that, A portion of the heat exchange structure (110) extends to the outside of the housing (100) to form an extension (114); The extension (114) is provided with a total inlet (115) and a total outlet (116), both of which are connected to the heat exchange channel (111).

10. A battery pack (10), characterized in that, include: The housing (100) is provided with a storage space (101); Multiple battery packs (200) are arranged sequentially in the accommodating space (101) along a first direction (x); The cooling system as described in any one of claims 1-9.

11. The battery pack (10) according to claim 10, characterized in that, The multiple heat exchange partitions (120) are divided into at least two heat exchange groups, the at least two heat exchange groups include an upstream heat exchange group and a downstream heat exchange group, the heat exchange medium is used to flow through the flow guiding assembly (130) sequentially through the branch port (112), the upstream heat exchange group, the downstream heat exchange group and the confluence port (113); wherein, the housing (100) is provided with a first structural beam (102) in the accommodating space (101), the first structural beam (102) is located between the upstream heat exchange group and the downstream heat exchange group.

12. The battery pack (10) according to claim 10, characterized in that, The housing (100) has a second structural beam (103) extending along the first direction (x) within the accommodating space (101). The second structural beam (103) is located on one side of the battery pack (200) along the second direction (y) that intersects with the first direction (x). The second structural beam (103) is used to limit the battery pack (200) and the heat exchanger (120).

13. The battery pack (10) according to claim 12, characterized in that, The second structural beam (103) is provided with a plurality of clearance structures (104) at intervals along the first direction (x), and the clearance structures (104) penetrate through the opposite sides of the second structural beam (103); The heat exchanger (120) extends through the avoidance structure (104) to the side of the second structural beam (103) opposite to the battery pack (200) and is in communication with the flow guide assembly (130).

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