23 can connect with the first cooling pipe 21 and the second cooling pipe 22, the volume should be reduced as much as possible to save space, and it can be designed according to the internal space of the battery pack, without limitation.

For example, referring to FIGS. 1 and 2, the first flow channel 111 and the second flow channel 112 are arranged along the third direction of the connector 1.

For example, the first cooling pipe 21 and the second cooling pipe 22 play the role of cooling the cylindrical battery cell, and they can be made of metal materials such as aluminum alloy, steel, copper alloy or materials with good thermal conductivity, without limitation. For example, a plurality of pipes are respectively arranged in the first cooling pipe 21 and the second cooling pipe 22, which improves the uniformity of cooling liquid introduced into the first cooling pipe 21 and the second cooling pipe 22, and further improves the cooling effect along the third direction of the cylindrical battery cell.

In this embodiment, the cooling pipe assembly 2 and the connector 1 can be welded. In other embodiments, the cooling pipe assembly 2 and the connector 1 are detachably connected to facilitate assembly; For example, the cooling pipe assembly 2 may be located only on one side of the connector 1, and the first flow channel 111 and the second flow channel 112 on the other side may be blocked, so that the connector 1 is located at one end, which can be set according to the actual situation.

For example, the first cooling pipe and the second cooling pipe are both serpentine pipes, and the shape of the serpentine pipe is matched with the cylindrical battery cell, so that the contact area between the cooling pipe assembly 2 and the cylindrical battery cell is increased, and the cooling effect is improved. For example, the first cooling pipe 21 and the second cooling pipe 22 are respectively provided with a plurality of circular arc surfaces, and the radian of the circular arc surfaces is matched with that of the cylindrical battery cell.

For example, the outer surface of the cooling pipe assembly 2 is provided with a heat-conducting structural layer, which can increase the bonding tightness between the cooling pipe assembly 2 and the cylindrical battery cell, so that the heat generated by the cylindrical cell is conducted to the cooling pipe assembly 2 through the heat-conducting structural layer, and the heat on the cooling pipe assembly 2 is taken away by the cooling liquid in its own pipeline, thus improving the cooling effect. For example, the heat-conducting structural layer is made of heat-conducting structural adhesive, which has a good heat-conducting effect, improves the structural installation reliability, and plays a dual role of heat conduction and structural fixation.

For example, the two ends of the connector 1 in the third direction are respectively provided with connectors, and two connectors 1 can be connected by the connectors. When a plurality of cooling plate assemblies are arranged in the third direction, two adjacent connectors 1 in the third direction are connected by connecting members, for example, the connecting members can be plugs and sockets, one end of the connector 1 is provided with a plug 12, and the other end is provided with a socket, and the two connectors 1 are connected by plug and socket. In other embodiments, the connectors can be connected according to the relevant technologies, so that the two connectors 1 can be connected without limitation.

For example, when the height of the cylindrical battery cell is large, a plurality of groups of cooling plate assemblies can be arranged along the third direction for cooling the cylindrical battery cell.

For example, as shown in FIG. 5, a plurality of cooling plate assemblies are arranged in the second direction to form a layer, and when a layer of cylindrical battery cells is arranged, a layer of cooling plate assemblies is arranged to cool a layer of cylindrical battery cells; When a plurality of layers of cylindrical battery cells are arranged, each layer of cylindrical battery cells is cooled by a layer of cooling plate assembly, and the connectors 1 of each layer are connected with the connectors 1 of the other layer in the multi-layer cooling plate assembly to ensure the stability of the mechanical structure connection and improve the connection reliability.

This embodiment also provides a liquid cooling module, as shown in FIG. 5, which includes a plurality of cooling plate assemblies 100; For example, a plurality of cooling plate assemblies are sequentially connected in the second direction by the connector 1, the third flow channels 113 of the cooling plate assemblies are communicated to form a first cooling liquid channel, and the fourth flow channels 114 of the cooling plate assemblies are communicated to form a second cooling liquid channel.

For example, the cooling plate assemblies 100 are arranged near the cylindrical battery cells, and the cooling plate assemblies 100 can be arranged between two adjacent rows of cylindrical battery cells. Multiple groups of cooling plate assemblies 100 are connected in parallel through the connector 1, and the cooling plate assemblies 100 are arranged to cool multiple rows of cylindrical battery cells. When the thermal management system of the battery starts to operate, the cooling liquid passes through the external liquid storage device and enters the connector 1 of the cooling plate assembly 100 at the end through the third flow channel 113 at one side of the connector 1. On the one hand, the first cooling flow channel formed by connecting a plurality of connectors 1 through a plurality of third flow channels 113 is a cooling inlet channel, and the cooling sequentially enters the connectors 1 of each cooling plate assembly 100; On the other hand, the cooling entering the connector 1 enters the first ends of the cooling pipe assemblies 2 on both sides from the first flow channel 111 of the connector 1; Then, it enters the connector 1 from the second end of the cooling pipe assembly 2 and the second flow channel 112, and the cooling liquid of each cooling plate assembly 100 flows out through the fourth flow channel 114 in turn. The second cooling liquid channel formed by connecting a plurality of connectors 1 through the fourth flow channel 114 is the cooling liquid outlet channel, and the cooling liquid flows out from the fourth flow channel 114 at the end. For example, the fourth flow channel 114 of the connector 1 of the cooling plate assembly 100 located at the end is connected with an external collecting device, which is arranged to collect the cooling liquid.

Each cooling plate assembly 100 is connected by a connector 1, and the connector 1 at the end is connected with an external liquid outlet device and an external collecting device respectively, and the first cooling liquid channel and the second cooling liquid channel formed by the connector 1 are connected to feed and discharge cooling liquid, so that the traditional water inlet and outlet pipe structure is abandoned, the structure is simplified, the space is saved, the volume utilization rate of the battery pack is improved, the assembly difficulty is reduced, and the cost is reduced. And the connector