Temperature control line assembly, battery module mounting bracket, battery cluster, and energy storage device

Abstract

The present application provides a temperature control line assembly, a battery module mounting bracket, a battery cluster, and an energy storage device. The temperature control line assembly mainly shunts a heat transfer medium flowing out of a temperature control apparatus to each battery module, so that each battery module in a battery cluster has a good heat dissipation effect, thereby improving the working stability and the service life of an energy storage device.

Description

A temperature control pipeline assembly, battery module mounting bracket, battery cluster and energy storage device Technical Field

[0001] The present application belongs to the field of batteries, and specifically relates to a temperature control pipeline assembly, a battery module mounting bracket, a battery cluster and an energy storage device. Background Art

[0002] Due to the advantages of lithium batteries such as high energy, long service life, high rated voltage, high power tolerance and low self-discharge rate, they have gradually become the mainstream product of energy storage equipment or power battery packs.

[0003] Existing energy storage devices or power battery packs all include multiple large-capacity batteries or battery modules. Each large-capacity battery or battery module is typically composed of multiple single cells connected in parallel, series, or a combination of series and parallel. Due to the high concentration of single cells in the battery module, a large amount of heat is generated during the charging and discharging process, and this heat will gradually increase. If the generated heat is not released in time, the heat will accumulate, causing uneven battery temperature, thereby reducing battery life. In severe cases, the battery's thermal balance is disrupted, triggering a series of self-heating side reactions, which in turn cause battery safety accidents, posing certain safety risks.

[0004] To ensure the safe and reliable operation of energy storage devices, they are equipped with a temperature control system to control the temperature of each battery module within the device, ensuring that each battery module always operates at an appropriate temperature. Currently, there is an urgent need for a temperature control piping assembly to provide a heat transfer medium to each battery module within such an energy storage device, thereby ensuring stable operation of the battery modules within the device. Summary of the Invention

[0005] The present application provides a temperature control pipeline assembly to provide a heat transfer medium for each battery module in an energy storage device, so that each battery module in the energy storage device can operate safely, stably and reliably.

[0006] The present application provides the following different forms of temperature control pipeline assemblies, which are mainly used to provide heat transfer medium to battery modules in one or more battery clusters.

[0007] The present application provides a temperature control pipeline assembly of the first structural form, which can not only provide heat transfer medium to each battery module, but also solve the problem of difficulty in installing and maintaining liquid cooling pipelines in the temperature control system of existing energy storage equipment.

[0008] The temperature control pipeline assembly provided by the present application includes a liquid inlet main line, a liquid return main line, a liquid inlet branch line, a liquid return branch line, a first-level liquid return pipe and a first-level liquid inlet pipe; the liquid inlet main line is mainly formed by splicing a plurality of three-level liquid inlet pipes through a first connecting pipe, and one port of the first connecting pipe is used to connect to the liquid inlet of a liquid inlet branch line; the liquid return main line is mainly formed by splicing a plurality of three-level liquid return pipes through a second connecting pipe, and one port of the second connecting pipe is used to connect to the liquid outlet of a liquid return branch line; the liquid inlet branch line is mainly formed by splicing a plurality of two-level liquid return pipes The stage liquid inlet pipe is formed by splicing the third connecting pipe, and one port of the third connecting pipe is used to connect with the inlet of the first liquid inlet pipe; the return liquid branch pipe is mainly formed by splicing multiple secondary return liquid pipes through the fourth connecting pipe, and one port of the fourth connecting pipe is used to connect with the outlet of the first liquid return pipe; the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all three-way joints; the outlet of the first liquid inlet pipe is used to connect with the heat exchange inlet of the battery module, and the inlet of the first liquid return pipe is used to connect with the heat exchange outlet of the battery module.

[0009] Furthermore, the liquid inlet main line and the liquid return main line are respectively arranged on both sides of the battery cluster, and the liquid inlet main line, the liquid return main line, the liquid inlet branch line and the liquid return branch line are located in the same plane.

[0010] Furthermore, the flow areas of the first-level liquid inlet pipe, the second-level liquid inlet pipe, and the third-level liquid inlet pipe gradually increase, and the flow areas of the first-level liquid return pipe, the second-level liquid return pipe, and the third-level liquid return pipe gradually increase.

[0011] Furthermore, the tertiary liquid inlet pipe, the tertiary liquid return pipe, the secondary liquid inlet pipe and the secondary liquid return pipe are covered with a thermal insulation sleeve.

[0012] Furthermore, the first-level liquid inlet pipe and the first-level liquid return pipe are flexible pipes, and the third-level liquid inlet pipe and the third-level liquid return pipe are flexible pipes.

[0013] Furthermore, the liquid inlet of the liquid inlet branch pipeline and the liquid outlet of the liquid return branch pipeline are both provided with quick-connect connectors, and the tops of the liquid inlet main pipeline and the liquid return main pipeline are provided with exhaust valves.

[0014] The present application also provides an energy storage device, which includes multiple battery modules and the above-mentioned temperature control pipeline assembly; the multiple battery modules are arranged in sequence in the horizontal direction to form a battery module unit, and the multiple battery module units are arranged in sequence in the vertical direction to form a battery cluster; the heat exchange inlet of the battery module is connected to the outlet of the first-level liquid inlet pipe, and the heat exchange outlet of the battery module is connected to the inlet of the first-level liquid return pipe.

[0015] Furthermore, it also includes a battery rack; the battery rack includes a plurality of mounting brackets arranged in sequence along the vertical direction and a vertical support beam fixedly connecting the plurality of mounting brackets; the battery module unit is arranged on the mounting bracket.

[0016] Furthermore, the liquid inlet branch pipeline and the liquid return branch pipeline are both embedded and installed in the installation bracket.

[0017] Furthermore, the liquid inlet main line and the liquid return main line are both embedded and installed in the vertical support beam.

[0018] The present application provides a temperature control pipeline assembly of a second structural form, which provides a relatively balanced heat transfer medium for each battery module in the energy storage device, so that each battery module in the energy storage device can operate reliably and stably.

[0019] The temperature control pipeline assembly includes a liquid inlet pipeline unit and a liquid return pipeline unit; the liquid inlet pipeline unit includes a six-level liquid inlet main pipeline, a five-level liquid inlet main pipeline, a four-level liquid inlet main pipeline, a three-level liquid inlet main pipeline, a two-level liquid inlet branch pipeline and a first-level liquid inlet pipe; the inlet of the six-level liquid inlet main pipeline is used to be connected to the temperature control device; the five-level liquid inlet main pipeline is used to shunt the heat transfer medium in the six-level liquid inlet main pipeline to multiple battery compartments; the four-level liquid inlet main pipeline is used to shunt the heat transfer medium in the five-level liquid inlet main pipeline to multiple battery clusters; the three-level liquid inlet main pipeline is used to shunt the heat transfer medium in the four-level liquid inlet main pipeline to multiple battery module units; the two-level liquid inlet branch pipeline is used to shunt the heat transfer medium in the three-level liquid inlet main pipeline to multiple battery modules; the first-level liquid inlet pipe is used for heat exchange with the battery module Inlet connection; the liquid return pipeline unit includes a six-level liquid return main line, a five-level liquid return main line, a four-level liquid return main line, a three-level liquid return main line, a two-level liquid return branch line and a first-level liquid return pipe; the first-level liquid return pipe is used to be connected to the heat exchange outlet of the battery module, and the second-level liquid return branch line is used to collect the heat transfer medium in multiple first-level liquid return pipes into the three-level liquid return main line; the three-level liquid return main line is used to collect the heat transfer medium in multiple second-level liquid return branch lines into the four-level liquid return main line; the four-level liquid return main line is used to collect the heat transfer medium in multiple third-level liquid return main lines into the five-level liquid return main line; the five-level liquid return main line is used to collect the heat transfer medium in multiple fourth-level liquid return main lines into the six-level liquid return main line, and the outlet of the six-level liquid return main line is used to be connected to the temperature control device.

[0020] Furthermore, the lengths of the plurality of five-stage liquid return main lines are the same, the lengths of the plurality of four-stage liquid return main lines are the same, and the lengths of the plurality of three-stage liquid return main lines are the same.

[0021] Furthermore, the flow areas of the sixth-level liquid inlet main line, the fifth-level liquid inlet main line, the fourth-level liquid inlet main line, the third-level liquid inlet main line, the second-level liquid inlet branch line and the first-level liquid inlet pipe gradually decrease, and the flow areas of the sixth-level liquid return main line, the fifth-level liquid return main line, the fourth-level liquid return main line, the third-level liquid return main line, the second-level liquid return branch line and the first-level liquid return pipe gradually decrease.

[0022] Furthermore, the secondary liquid inlet branch pipeline is mainly formed by alternately splicing multiple liquid inlet branch pipe sections and multiple first connecting pipes, and one port of each first connecting pipe is used to connect to the inlet of a primary liquid inlet pipe; the secondary liquid return branch pipeline is mainly formed by alternately splicing multiple liquid return branch pipe sections and multiple second connecting pipes, and one port of the second connecting pipe is used to connect to the outlet of a primary liquid return pipe; the first connecting pipe and the second connecting pipe are both three-way joints.

[0023] Furthermore, the tertiary liquid inlet main line is mainly formed by alternately splicing multiple liquid inlet branch pipe sections and multiple third connecting pipes, and one port of the third connecting pipe is used to connect to the liquid inlet of a secondary liquid inlet branch line; the tertiary liquid return main line is mainly formed by alternately splicing multiple liquid return branch pipe sections and multiple fourth connecting pipes, and one port of the fourth connecting pipe is used to connect to the liquid outlet of a secondary liquid return branch line; the third connecting pipe and the fourth connecting pipe are both three-way joints.

[0024] Furthermore, the six-level liquid inlet main line, the five-level liquid inlet main line, the four-level liquid inlet main line, the six-level liquid return main line, the five-level liquid return main line, and the four-level liquid return main line are all located on the top of each battery cluster, and the three-level liquid inlet main line and the three-level liquid return main line are respectively arranged on both sides of each battery cluster.

[0025] Furthermore, the first-level liquid inlet pipe and the first-level liquid return pipe are flexible pipes.

[0026] Furthermore, the liquid inlet of the secondary liquid inlet branch pipeline and the liquid outlet of the secondary liquid return branch pipeline are both provided with quick-connect connectors, and the tops of the tertiary liquid inlet main pipeline and the tertiary liquid return main pipeline are provided with exhaust valves.

[0027] The present application also provides an energy storage device, including an energy storage box, multiple battery modules and a temperature control system, wherein the temperature control system includes a temperature control device and a temperature control pipeline assembly; multiple battery modules are arranged in sequence in the horizontal direction to form a battery module unit, and multiple battery module units are arranged in sequence in the vertical direction to form a battery cluster, and multiple battery clusters are arranged linearly in the energy storage box; the temperature control device is arranged on the same side of each battery cluster in the energy storage box; the heat exchange inlet of the battery module is connected to the outlet of the first-level liquid inlet pipe, and the heat exchange outlet of the battery module is connected to the inlet of the first-level liquid return pipe.

[0028] Furthermore, it also includes a battery rack, which includes a plurality of mounting brackets arranged in sequence along the vertical direction and a vertical support beam that fixedly connects the plurality of mounting brackets; the battery module unit is arranged on the mounting bracket, and the secondary liquid inlet branch pipe and the secondary liquid return branch pipe are both embedded and installed in the mounting bracket.

[0029] The present application also provides a battery module mounting bracket, which cooperates with the temperature control pipeline assembly and the battery module mounting bracket to solve the problem of difficulty in installing and maintaining liquid cooling pipelines in the existing energy storage equipment temperature control system.

[0030] The battery module mounting bracket provided in the present application includes a bracket body and a temperature control pipe assembly; the bracket body is used to insulate and support at least one battery module; the temperature control pipe assembly includes a first-level liquid inlet pipe, a first-level liquid return pipe, a second-level liquid inlet pipe and a second-level liquid return pipe; multiple second-level liquid inlet pipes are connected through a first three-way joint to form a liquid inlet branch pipe, and multiple second-level liquid return pipes are connected through a second three-way joint to form a liquid return branch pipe, and the liquid inlet branch pipe and the liquid return branch pipe are both embedded and installed in the bracket body; one end of the first-level liquid inlet pipe is used to be connected to the heat exchange inlet of the battery module, and the other end is connected to the second-level liquid inlet pipe through the first three-way joint; one end of the first-level liquid return pipe is used to be connected to the heat exchange outlet of the battery module, and the other end is connected to the second-level liquid return pipe through the second three-way joint.

[0031] Furthermore, the bracket body is mainly composed of a frame structure surrounded by two first support beams and two second support beams; at least one first support beam is made of I-shaped steel, and the liquid inlet branch pipeline and the liquid return branch pipeline are embedded in the I-shaped steel.

[0032] Furthermore, a pressing plate is provided on the I-shaped steel, and the pressing plate fixes the liquid inlet branch pipeline and the liquid return branch pipeline on the I-shaped steel.

[0033] Furthermore, it also includes a U-shaped guard plate arranged on one side of the I-beam, and the liquid inlet branch pipeline and the liquid return branch pipeline are arranged in the protective space formed by the U-shaped guard plate and the I-beam. At the same time, the U-shaped guard plate has an avoidance gap for the first-level liquid inlet pipe and the first-level liquid return pipe to pass through.

[0034] Furthermore, the secondary liquid inlet pipe and the secondary liquid return pipe are covered with a thermal insulation sleeve.

[0035] Furthermore, the liquid inlet of the liquid inlet branch pipeline and the liquid outlet of the liquid return branch pipeline both extend to the outside of the bracket body.

[0036] Furthermore, the first-level liquid inlet pipe and the first-level liquid return pipe are flexible pipes.

[0037] Furthermore, it also includes a flue gas pipeline assembly, which includes multiple flue gas pipelines, and the multiple flue gas pipelines are connected in series through flexible tees, and one port in each flexible tee is used to connect to the explosion relief pipeline on a battery module.

[0038] Furthermore, the liquid inlet branch pipeline and the liquid return branch pipeline are embedded and installed on one side of the first support beam, and the flue gas pipeline assembly is embedded and installed on the other side of the first support beam.

[0039] Furthermore, the second support beam is a square steel tube, a plurality of through slots are provided at the bottom of the square steel tube, the roller is installed in the square steel tube, and the bottom thereof extends out of the through slots of the square steel tube.

[0040] The present application also provides a battery cluster, which provides a way to cooperate with N rows of battery modules to overcome the safety risks of existing battery modules.

[0041] The battery cluster includes N rows of battery modules and a temperature control pipeline assembly, wherein the temperature control pipeline assembly includes a liquid inlet branch pipeline and a liquid return branch pipeline, wherein N is an integer greater than or equal to 2; each battery module is provided with a heat exchange device; at least one battery module in the first row of battery modules to at least one battery module in the Nth row of battery modules constitute a battery module unit; the heat exchange devices of all battery modules in each battery module unit are connected in series, and after the series connection, each battery module unit has a liquid inlet and a liquid outlet; the liquid inlet of each battery module unit is connected to the liquid inlet branch pipeline, and the liquid outlet is connected to the liquid return branch pipeline.

[0042] Furthermore, each battery module unit has the same number of battery modules, and in each battery module unit, the number of battery modules in each row is the same.

[0043] Furthermore, the liquid inlet branch pipeline is mainly composed of multiple liquid inlet pipe sections, and the liquid return branch pipeline is mainly composed of multiple liquid return pipe sections, and the number of liquid inlet pipe sections and liquid return pipe sections is the same as the number of battery module units; the liquid inlet of each battery module unit is respectively connected to the branch pipeline of each liquid inlet pipe section through a quick-plug connector, and the liquid outlet of each battery module unit is respectively connected to the branch pipeline of each liquid return pipe section through a quick-plug connector.

[0044] Furthermore, it also includes a support frame, on which the battery modules of multiple battery module units are placed; the support frame includes N support frames arranged in sequence from top to bottom, and a bracket is provided at the bottom of each battery module; each row of battery modules is set on a support frame through a bracket, and adjacent support frames are connected into a frame body through vertical connecting beams, and the bottom of the Nth support frame has at least one sliding roller.

[0045] Furthermore, it also includes multiple support frames, the number of which is the same as the number of battery module units, the battery module of a battery module unit is placed on a support frame, and the support frame includes N support frames arranged in sequence from top to bottom; in each battery module unit, a bracket is provided at the bottom of each battery module, each row of battery modules is set on a support frame through the bracket, and adjacent support frames are connected into a frame body through vertical connecting beams, and the bottom of the Nth support frame has at least one sliding roller.

[0046] Furthermore, the liquid inlet branch pipeline and the liquid return branch pipeline are both embedded and installed in the supporting frame.

[0047] Furthermore, the battery module includes a shell and a plurality of single cells arranged in the shell in the same direction; a shared chamber is provided in the shell, and the inner cavity of the shared chamber is connected to the inner cavities of all single cells; avoidance holes are opened on the top plate of the shell corresponding to the polarity terminals of each single cell; the polarity terminals of each single cell extend out of the avoidance holes, and the top plate area of ​​the shell corresponding to the avoidance holes is fixedly sealed with the shell of the single cell.

[0048] Furthermore, the heat exchange device includes a heat transfer tube, and a clamping portion is provided at the location where each single battery polarity terminal extends out of the avoidance hole; the heat transfer tube is fixed on the clamping portion of each single battery polarity terminal, and the heat transfer tube is insulated from each single battery.

[0049] Furthermore, an insulating sealant layer is laid on the top plate of the shell, and the liquid inlet and outlet ports of the heat transfer tube extend out of the insulating sealant layer; at the same time, an insulating protective cover is provided on the top of the shell, and the polarity terminals of each single battery are located in the insulating protective cover.

[0050] Furthermore, it also includes a flue gas manifold, which includes multiple flue gas pipelines and flexible tees. The multiple flue gas pipelines are connected in series through the flexible tees, and one port in each flexible tee is used to connect to an explosion relief assembly on a battery module, and the explosion relief assembly is connected to a shared chamber in the shell.

[0051] The present application also provides an energy storage device, including an energy storage box and multiple battery clusters; the multiple battery clusters are arranged from top to bottom, and the battery module unit is set on the battery rack in the energy storage box through a support frame.

[0052] Compared with the existing technology, the technical solution of this application has the following advantages:

[0053] 1. In this application's temperature control piping assembly, the main liquid inlet line, the main liquid return line, the liquid inlet branch line, and the liquid return branch line are all formed using spliced ​​piping. This spliced ​​piping reduces errors in connecting the various pipes in the temperature control piping assembly and reduces assembly difficulty. Furthermore, subsequent repairs to this spliced ​​piping require only the removal of the pipe connectors of the relevant battery modules, without the need to dismantle the entire temperature control piping assembly, making installation and maintenance very convenient.

[0054] 2. In the temperature control pipe assembly of the present application, the liquid inlet main line and the liquid return main line are respectively arranged on both sides of the battery cluster, and the liquid inlet main line, liquid return main line, liquid inlet branch line, and liquid return branch line are installed in the same plane. This arrangement can improve the connectivity of the entire temperature control pipe assembly and the compactness of the pipe layout, avoid pipe stacking and crossing, and increase the inconvenience of connection.

[0055] 3. In the temperature control pipeline assembly of the present application, the flow areas of the first-level liquid inlet pipe, the second-level liquid inlet pipe, and the third-level liquid inlet pipe gradually increase, and the flow areas of the first-level liquid return pipe, the second-level liquid return pipe, and the third-level liquid return pipe gradually increase. This arrangement makes the flow deviation of the heat transfer medium for heat exchange with each battery module smaller, and achieves uniform liquid delivery as much as possible, and the heat exchange between each battery module is as consistent as possible. The temperature difference between each battery module is as small as possible, thereby achieving more uniform heat exchange for the battery module, reducing the temperature difference of the battery module, and improving the service life of the battery module.

[0056] 4. In the temperature control pipeline assembly of the present application, the third-level liquid inlet pipe, the third-level liquid return pipe, the second-level liquid inlet pipe and the second-level liquid return pipe are covered with an insulation sleeve. The insulation sleeve can reduce the heat loss of the high-temperature heat transfer medium, and also reduce the influence of the external environment on the heat transfer medium in the pipeline.

[0057] 5. In the temperature control pipeline assembly of the present application, the first-level liquid inlet pipe, the first-level liquid return pipe, the third-level liquid inlet pipe, and the third-level liquid return pipe are flexible pipelines. The flexible pipelines reduce the installation error during pipeline connection, reduce the on-site installation requirements, and further increase the installation convenience of the temperature control pipeline assembly.

[0058] 6. In the temperature control pipeline assembly of the present application, quick-connect connectors are provided on the liquid inlet of the liquid inlet branch pipeline and the liquid outlet of the liquid return branch pipeline. The quick-connect connectors are easy to install and can be directly plugged in and out without tools, which can improve the convenience of installation or disassembly.

[0059] 7. The present application also provides an energy storage device, which includes the above-mentioned spliced ​​temperature control pipeline assembly. During subsequent maintenance, the spliced ​​temperature control pipeline assembly only needs to remove the pipeline connector of the relevant battery module for maintenance, without the need to remove the entire temperature control pipeline assembly, which is very convenient for installation and maintenance.

[0060] 8. In the energy storage device of the present application, the liquid inlet branch pipeline and the liquid return branch pipeline are both embedded and installed in the mounting bracket of the battery rack, and the liquid inlet main pipeline and the liquid return main pipeline are both embedded and installed in the vertical support beam of the battery rack, so that the temperature control pipeline assembly occupies less space and the degree of integration of the entire energy storage device is better.

[0061] 9. In the temperature control pipeline assembly of the present application, the liquid inlet pipeline unit and the liquid return pipeline unit are connected and combined through a multi-stage pipeline connection, so that the heat transfer medium flowing out of the temperature control device is diverted step by step and evenly distributed to each battery module, and the heat transfer medium flow allocated to each battery module is balanced, so that each battery cluster and each battery module in the battery cluster has a good and balanced heat dissipation effect, thereby improving the working stability and service life of the energy storage equipment.

[0062] 10. In the temperature control pipeline assembly of the present application, the lengths of multiple five-level liquid return main lines are the same, the lengths of multiple four-level liquid return main lines are the same, and the lengths of multiple three-level liquid return main lines are the same. This arrangement makes the flow deviation of the heat transfer medium for heat exchange with each battery module smaller, and achieves uniform liquid delivery as much as possible. The heat exchange amount between each battery module is as consistent as possible, and the temperature difference between each battery module is as small as possible, thereby achieving more uniform heat exchange for each battery module, reducing the temperature difference between each battery cluster and each battery module, and improving the safety of the energy storage equipment.

[0063] 11. In the temperature control pipeline assembly of the present application, the flow areas of the six-level liquid inlet main line, the five-level liquid inlet main line, the four-level liquid inlet main line, the three-level liquid inlet main line, the two-level liquid inlet branch line and the one-level liquid inlet pipe gradually decrease, and the flow areas of the six-level liquid return main line, the five-level liquid return main line, the four-level liquid return main line, the three-level liquid return main line, the two-level liquid return branch line and the one-level liquid return pipe gradually decrease. This arrangement makes the flow deviation of the heat transfer medium for heat exchange with each battery module smaller, reduces the temperature difference of the battery module, and improves the service life of the battery module.

[0064] 12. In this application's temperature-controlled piping assembly, the three-stage liquid inlet main line, three-stage liquid return main line, two-stage liquid inlet branch line, and two-stage liquid return branch line are all formed using spliced ​​piping. This spliced ​​piping reduces errors in connecting the various piping in the temperature-controlled piping assembly and reduces assembly difficulty. Furthermore, subsequent repairs require only the removal of the piping connectors of the relevant battery modules, without the need to dismantle the entire temperature-controlled piping assembly, making installation and maintenance very convenient.

[0065] 13. In the temperature control pipeline assembly of the present application, the six-level liquid inlet main line, the five-level liquid inlet main line, the four-level liquid inlet main line, the six-level liquid return main line, the five-level liquid return main line, and the four-level liquid return main line are all located at the top of the battery cluster, and the three-level liquid inlet main line and the three-level liquid return main line are respectively arranged on both sides of each battery cluster. This arrangement can improve the connectivity of the entire temperature control pipeline assembly and the compactness of the pipeline layout, avoid the stacking and crossing of pipelines, and increase the inconvenience of connection.

[0066] 14. In the temperature control pipeline assembly of the present application, the first-level liquid inlet pipe and the first-level liquid return pipe are flexible pipelines. The flexible pipelines reduce the installation error during pipeline connection, reduce the on-site installation requirements, and further increase the installation convenience of the temperature control pipeline assembly.

[0067] 15. In the temperature control pipeline assembly of the present application, quick-connect connectors are provided on the liquid inlet of the secondary liquid inlet branch pipeline and the liquid outlet of the secondary liquid return branch pipeline. The quick-connect connectors are easy to install and can be directly plugged in and installed without tools, which can improve the convenience of installation or disassembly.

[0068] 16. In the energy storage device of the present application, the temperature control device is arranged on the same side of each battery cluster, so that the space layout inside the energy storage box is reasonable and the risk of leakage of the temperature control device is reduced. At the same time, the corresponding temperature control pipeline assembly layout is arranged so that the cooling effect of each battery cluster and each battery module is equivalent, thereby improving the service life of the entire energy storage device.

[0069] 17. In the energy storage device of the present application, the secondary liquid inlet branch pipeline and the secondary liquid return branch pipeline are both embedded and installed in the mounting bracket of the battery rack, so that the temperature control pipeline assembly occupies less space and the degree of integration of the entire energy storage device is better.

[0070] 18. The battery module mounting bracket of the present application is integrated with a temperature control piping assembly, and the entire battery module mounting bracket has a high degree of integration. At the same time, three-way connectors are used to connect the secondary liquid inlet pipe and the secondary liquid return pipe in the above-mentioned temperature control piping assembly, as well as the primary liquid inlet pipe, the primary liquid return pipe, the secondary liquid inlet pipe, and the secondary liquid return pipe. This splicing connection reduces the error when connecting the various pipes in the temperature control piping assembly and the difficulty of assembly. At the same time, this splicing connection only requires the removal of the liquid cooling pipe connector of the relevant battery module for subsequent maintenance, without the need to remove the entire temperature control piping assembly, making installation and maintenance convenient.

[0071] 19. In the battery module mounting bracket of the present application, the bracket body is primarily composed of a frame structure formed by two first support beams and two second support beams; at least one first support beam is made of I-shaped steel, and the liquid inlet branch pipe and the liquid return branch pipe are embedded in one side of the I-shaped steel. This type of bracket body has a simple structure, and the liquid inlet branch pipe and the liquid return branch pipe are also relatively easy to embed and install. In addition, the liquid inlet branch pipe and the liquid return branch pipe are embedded in the first support beam to isolate the battery module from the liquid inlet branch pipe and the liquid return branch pipe, thereby preventing leakage at the pipe joints from affecting the battery module.

[0072] 20. In the battery module mounting bracket of the present application, a pressure plate is used to securely fix the liquid inlet branch pipe and the liquid return branch pipe on the I-beam, so that the liquid inlet branch pipe and the liquid return branch pipe will not shake inside the bracket body, thereby avoiding problems such as loose joints caused by shaking during transportation or use.

[0073] 21. In the battery module mounting bracket of the present application, the liquid inlet branch pipe and the liquid return branch pipe are arranged in the protective space formed by the U-shaped guard plate and the I-shaped steel. At this time, most of the pipe joints in the temperature control pipe assembly are installed in the protective space. During the installation or disassembly and moving of the battery module, the U-shaped guard plate further protects the pipe joints to avoid damage to the pipe joints.

[0074] 22. In the battery module mounting bracket of the present application, the secondary liquid inlet pipe and the secondary liquid return pipe are covered with an insulation sleeve, which can reduce the heat loss of the high-temperature coolant and also reduce the influence of the external environment on the coolant in the pipeline.

[0075] 23. In the battery module mounting bracket of the present application, the liquid inlet of the liquid inlet branch line and the liquid outlet of the liquid return branch line are extended to the outside of the bracket body, which is convenient for connection with the external liquid supply main line and liquid return main line.

[0076] 24. In the battery module mounting bracket of the present application, the first-level liquid inlet pipe and the first-level liquid return pipe are flexible pipes. The flexible pipes reduce the installation errors between the first-level liquid inlet pipe, the first-level liquid return pipe and the battery module and the three-way joint, reduce the on-site installation requirements, and further increase the installation convenience of the temperature control pipe assembly.

[0077] 25. This application integrates the flue gas piping assembly into the battery module mounting bracket, further improving the integration of the entire battery module mounting bracket. Simultaneously, the flue gas piping assembly is embedded into the bracket body, saving space in the energy storage device and increasing its energy density.

[0078] 26. In the battery module mounting bracket of the present application, rollers are installed in the through slots of the second support beam so that the battery module mounting bracket can be easily installed in place or removed for maintenance.

[0079] 27. In the battery cluster of the present application, the battery module realizes the circulation of the heat transfer medium through the heat exchange device and the liquid inlet branch pipe and the liquid return branch pipe, thereby realizing the temperature control of the battery module, improving the safety of the battery module during use, and avoiding safety hazards. Secondly, when the heat transfer medium circulates, N rows of battery modules share one liquid inlet branch pipe and one liquid return branch pipe, which reduces the number and cost of pipes in the battery cluster. The arrangement of the pipes is also relatively simple, saving the installation space of the pipes and improving the energy density of the battery cluster. Finally, the heat exchange devices of all battery modules in each battery module unit are connected in series, and after the series connection, each battery module unit has a liquid inlet and a liquid outlet, so that N rows of battery modules can be connected to the liquid inlet branch pipe and the liquid return branch pipe through fewer pipe joints. The reduction of pipe joints facilitates on-site installation, disassembly and maintenance, and the cost of the pipes is further reduced. At the same time, the reduction of pipe joints makes the leakage risk relatively low and the pipeline reliability relatively good.

[0080] 28. In the battery cluster of the present application, the number of battery modules in each battery module unit is the same, and in each battery module unit, the number of battery modules in each row is the same; this quantity limitation makes the heat exchange between the heat transfer medium and each battery module unit as consistent as possible, and the temperature difference between each battery module unit as small as possible, thereby achieving more uniform heat exchange for each battery module unit, balancing the temperature difference between each battery module unit, and improving the safety of the battery cluster during use.

[0081] 29. In the battery cluster of this application, both the liquid inlet branch line and the liquid return branch line are spliced ​​lines, and each battery module unit is connected to the corresponding liquid inlet pipe section and liquid return pipe section. This type of spliced ​​line reduces the error when connecting the liquid inlet branch line and the liquid return branch line and reduces the difficulty of assembly. At the same time, during subsequent maintenance of this type of spliced ​​line, it is only necessary to remove the liquid inlet pipe section and liquid return pipe section of the relevant battery module unit for maintenance, without having to remove the entire liquid inlet branch line and liquid return branch line, greatly improving the convenience of installation, disassembly and maintenance.

[0082] 30. In the battery cluster of the present application, the liquid inlet of each battery module unit is connected to the branch pipe of each liquid inlet pipe section through a quick-connect connector, and the liquid outlet of each battery module unit is connected to the branch pipe of each return pipe section through a quick-connect connector. The quick-connect connector is easy to install and can be directly plugged in and out without tools, further improving the convenience of installation or disassembly.

[0083] 31. In the battery cluster of this application, the battery modules of multiple battery module units are placed on a single support frame. This installation method is more stable and can more firmly support N rows of battery modules. At the same time, the bottom of the Nth support frame has sliding rollers, which can easily install the battery module unit in place.

[0084] 32. In the battery cluster of the present application, each battery module unit is placed on a corresponding support frame. This installation method makes the use of the entire battery cluster wider and the battery modules in the battery cluster can be assembled in a smaller installation space. At the same time, this installation method only requires removing some battery module units from the battery rack for maintenance during later maintenance, without removing all battery module units, and maintenance is relatively convenient.

[0085] 33. In the battery cluster of the present application, the liquid inlet branch pipe and the liquid return branch pipe are embedded and installed in the support frame. This installation method can not only isolate the battery module from the liquid inlet branch pipe and the liquid return branch pipe, avoiding the impact of leakage at the pipe joints on the battery module, but also the embedded installation also improves the integration level of the entire battery cluster.

[0086] 34. In the battery cluster of the present application, the battery module includes a shell and a plurality of single cells arranged in the shell in the same direction; a shared chamber is provided in the shell, and the plurality of single cells are placed inside the shell having the shared chamber. The shared chamber is connected to the inner cavities of the single cells located in the shell, so that the electrolyte and gas of each single cell are shared to ensure the consistency of each single cell, reduce the difference between the electrolyte and gas of each single cell, improve the consistency between the single cells to a certain extent, and thus improve the cycle life of the battery module to a certain extent.

[0087] 35. In the battery cluster of the present application, the heat exchange device includes a heat transfer tube, and a clamping portion is provided at the polarity terminal of the battery module. The heat transfer tube is fixed by the clamping portion so that the heat transfer tube is in direct contact with the polarity terminal of the battery module, and the heat from the polarity terminal where the heat is most concentrated is transferred to the outside for processing, thereby achieving more reliable temperature control of the battery module.

[0088] 36. In the battery cluster of the present application, an insulating sealant layer is laid on the top plate of the outer shell. When condensation occurs on the surface of the heat transfer tube on the polarity terminal, the condensation cannot penetrate into the gap between the polarity terminal and the avoidance hole due to the blocking of the insulating sealant layer, thereby preventing the occurrence of battery short circuit. At the same time, an insulating protective cover is used to provide insulation protection for the polarity terminal, avoiding the potential safety hazards of the polarity terminal being exposed during the operation of the battery module, and also avoiding the problem of some foreign matter from the external environment falling into the polarity terminal position and causing the battery module to short circuit, thereby improving the safety of the battery module.

[0089] 37. In the battery cluster of the present application, an explosion relief assembly connected to the shared chamber is provided on the outer shell; the smoke manifold is connected to the explosion relief assembly on the battery module, and the thermal runaway smoke of all battery modules in the battery cluster is converged by the smoke manifold. When a single battery in any battery module in the battery cluster experiences thermal runaway, its thermal runaway smoke can be discharged through the smoke manifold, thereby reducing the risk of thermal runaway spreading, combustion or explosion of the battery module or even the battery cluster. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] FIG1 is a schematic diagram of the connection between two sets of temperature control pipeline assemblies and a temperature control device in Example 1;

[0091] FIG2 is a schematic diagram of the temperature control pipeline assembly in Example 1;

[0092] FIG3 is a schematic diagram of the energy storage device in Example 2;

[0093] FIG4 is a schematic diagram of the installation of the temperature control pipeline assembly and two battery clusters in Example 2;

[0094] FIG5 is a schematic diagram of the installation of the temperature control pipe assembly and the mounting bracket in Example 2;

[0095] FIG6 is a schematic diagram of the temperature control pipeline assembly in Example 3;

[0096] FIG7 is a partial schematic diagram of the temperature control pipeline assembly in Example 3;

[0097] FIG8 is a front view of the energy storage device in Example 4;

[0098] FIG9 is a top view of the energy storage device in Example 4;

[0099] FIG10 is a schematic diagram of the connection between the temperature control pipe assembly and the battery rack in Example 4;

[0100] FIG11 is a schematic diagram of a battery module mounting bracket in Example 5;

[0101] FIG12 is a schematic diagram of a battery module mounting bracket (with a thermal insulation cover) in Example 5;

[0102] FIG13 is a schematic diagram of a battery module mounting bracket (with rollers and a pressure plate) in Example 5;

[0103] FIG14 is a schematic diagram of a battery module mounting bracket (with a U-shaped guard plate) in Example 5;

[0104] FIG15 is a schematic diagram of a battery module mounting bracket in Example 6;

[0105] FIG16 is a schematic diagram of a battery cluster (four battery modules form a battery module unit) in Example 7;

[0106] FIG17 is a partial enlarged view of FIG16;

[0107] FIG18 is a schematic diagram of a battery cluster (seven battery modules form a battery module unit) in Example 7;

[0108] Figure 19 is a schematic structural diagram of the battery module in Example 7;

[0109] FIG20 is a schematic diagram of an explosion of the battery module in Example 7;

[0110] Figure 21 is a schematic structural diagram of the battery module in Example 8;

[0111] FIG22 is a schematic diagram of an explosion of a battery module in Example 8;

[0112] FIG23 is a schematic diagram of a battery cluster (four battery modules form a battery module unit) in Example 9;

[0113] FIG24 is a schematic diagram of a battery cluster (seven battery modules form a battery module unit) in Example 9;

[0114] FIG25 is a schematic diagram of an explosion of a battery cluster in Example 9;

[0115] FIG26 is a schematic structural diagram of the support frame in Example 9;

[0116] FIG27 is a schematic diagram of the installation of the battery module, bracket, and support frame in Example 9;

[0117] FIG28 is a schematic diagram of the assembly of the battery module and the bracket in Example 9;

[0118] FIG29 is a schematic structural diagram of the bracket in Example 9;

[0119] FIG30 is a schematic structural diagram of a battery cluster in Example 10;

[0120] FIG31 is a schematic diagram of an explosion of the battery cluster in Example 10.

[0121] Figure 1: 11-battery rack, 12-temperature control pipeline assembly, 13-battery module, 14-temperature control device, 111-mounting bracket, 112-vertical support beam, 113-pressing plate, 121-liquid inlet main pipeline, 122-liquid return main pipeline, 123-liquid inlet branch pipeline, 124-liquid return branch pipeline, 1201-first liquid inlet pipe, 1202-first liquid return pipe, 1203-second liquid inlet pipe, 1204-second liquid return pipe, 1205-third liquid inlet pipe, 1206-third liquid return pipe, 1207-first connecting pipe, 1208-second connecting pipe, 1209-third connecting pipe Tube, 1210-fourth connecting pipe, 1211-insulation sleeve, 1212-quick plug connector, 131-heat exchange inlet, 132-heat exchange outlet, 21-liquid inlet pipeline unit, 22-liquid return pipeline unit, 23-battery compartment, 24-battery cluster, 25-battery module unit, 26-battery rack, 27-temperature control device, 28-energy storage box, 211-sixth-level liquid inlet main line, 212-five-level liquid inlet main line, 213-fourth-level liquid inlet main line, 214-three-level liquid inlet main line, 215-secondary liquid inlet branch line, 216-first-level liquid inlet pipe, 217-quick plug connector, 218- Insulation sleeve, 2141-liquid inlet branch pipe section, 2142-third connecting pipe, 2151-liquid inlet branch pipe section, 2152-first connecting pipe, 221-sixth-level liquid return main line, 222-fifth-level liquid return main line, 223-fourth-level liquid return main line, 224-third-level liquid return main line, 225-secondary liquid return branch pipe, 226-first-level liquid return pipe, 2241-liquid return branch pipe section, 2242-fourth connecting pipe, 2251-liquid return branch pipe section, 2252-second connecting pipe, 241-battery module, 2411-heat exchange inlet, 2412-heat exchange outlet, 261-mounting bracket, 31-Bracket body, 32-Temperature control pipeline assembly, 33-Battery module, 34-Pressing plate, 35-U-shaped guard plate, 36-Flue gas pipeline assembly, 311-First support beam, 312-Second support beam, 313-Roller, 321-First liquid inlet pipe, 322-First liquid return pipe, 323-Second liquid inlet pipe, 324-Second liquid return pipe, 325-First three-way joint, 326-Second three-way joint, 327-Insulation sleeve, 331-Heat exchange inlet, 332-Heat exchange outlet, 341-Fixed block, 351-Avoidance gap, 361-Flue gas pipeline, 362-Live joint;400-battery module unit, 401-liquid inlet, 402-liquid outlet, 41-battery module, 42-heat transfer tube, 43-liquid inlet branch line, 44-liquid return branch line, 45-quick plug connector, 46-flue gas manifold, 47-bracket, 48-support frame, 49-intermediate pipeline, 410-branch pipeline, 411-housing, 412-single battery, 413-polarity terminal, 414-explosion venting assembly, 415-insulating sealant layer, 416-insulating protective cover, 4111-electrolysis Liquid-sharing chamber, 4112-gas-sharing chamber, 4131-clamping portion, 421-first pipe, 422-second pipe, 423-connecting pipe, 431-liquid inlet pipe section, 441-liquid return pipe section, 461-smoke pipe, 462-flexible tee, 471-support member, 472-L-shaped support plate, 481-first support frame, 482-second support frame, 483-vertical connecting beam, 484-sliding roller, 4811-first support beam, 4812-second support beam. DETAILED DESCRIPTION

[0122] To make the above-mentioned purposes, features, and advantages of this application more clearly understood, the following detailed description of the specific embodiments of this application is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of this application.

[0123] The phrases "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, nor do they refer to separate or selective embodiments that are mutually exclusive with other embodiments. In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. In the description of this application, "multiple" means two or more, unless otherwise specifically defined.

[0124] In this specification, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a direct connection, an indirect connection through an intermediate component, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0125] At the same time, in the description of this application, it should be noted that the orientations or positional relationships indicated by the terms "top, bottom, inside and outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0126] To meet the varying capacity requirements of energy storage devices, existing energy storage devices utilize multiple battery modules connected in series or parallel. To increase energy density, multiple battery modules can be arranged in an array. For example, multiple battery modules can be arranged horizontally to form a battery module unit, and then multiple battery module units can be arranged vertically to form a battery cluster. These battery modules are formed by connecting multiple single cells in parallel or series. A protective housing is installed on the outside of the battery module to protect each single cell. In some cases, this protective housing can be omitted.

[0127] During the charge and discharge process, the battery module itself generates a large amount of heat. If the battery module is not cooled in time, the performance of the battery module will decline. To ensure the safe and reliable operation of the energy storage device, the energy storage device is equipped with a temperature control system to control the temperature of each battery module in the energy storage device. This ensures that each battery in the battery module always operates at the appropriate temperature environment, avoiding the problems of excessively high temperatures that reduce the cycle life of the battery module and excessively low temperatures that prevent the battery module from starting.

[0128] Currently, liquid cooling is the primary method used to cool battery modules. When using liquid cooling, a heat exchange device is installed on each battery module. This heat exchange device can be a liquid cooling plate or liquid cooling tube that contacts each battery cell housing, each battery cell pole, or the protective housing. The liquid cooling tube or liquid cooling plate has an inlet and an outlet, which serve as the heat exchange inlet and outlet of the battery module and as an interface for connecting to the temperature control piping components in the temperature control system.

[0129] The temperature control pipe assembly and the temperature control device form a temperature control system to control the temperature of the battery module. The temperature control device processes the heat generated by the battery module and mainly includes a temperature controller and a circulation pump. The temperature controller is a device with heating and / or cooling functions, which is used to increase or decrease the temperature of the heat transfer medium (specifically, water, ethylene glycol / water, propylene glycol / water, methanol / water, ethanol / water, calcium formate / water, etc.) in the temperature control pipe assembly. For example, the temperature controller is specifically a heating and cooling machine or a refrigerator with a compressor, and the circulation pump is mainly used to circulate the heat transfer medium in the temperature control pipe assembly.

[0130] The temperature control system achieves temperature control of multiple battery modules by setting up multi-stage liquid cooling pipelines. In the above-mentioned multi-stage liquid cooling pipelines, the liquid cooling pipelines are generally manufactured and connected using whole pipes. This type of pipeline setting can increase the sealing of the liquid cooling pipelines. However, when using whole pipes for manufacturing and installation, the installation of each pipeline is more difficult, and the installation position of each pipeline must be accurately guaranteed to avoid installation errors. At the same time, during on-site maintenance, all liquid cooling pipelines must be disassembled before the relevant battery modules and liquid cooling pipelines can be repaired, which makes maintenance time laborious and inconvenient.

[0131] The present application mainly provides a temperature control pipeline assembly, in which the liquid inlet main line, the liquid return main line, the liquid inlet branch line, and the liquid return branch line are all formed by splicing multiple sections of pipelines, so that the temperature control pipeline assembly is not only easy to install and disassemble on site, achieving the purpose of rapid installation and disassembly, but also convenient for subsequent adjustment and maintenance of the temperature control pipeline assembly on site, reducing maintenance costs and improving maintenance efficiency.

[0132] Example 1

[0133] As shown in Figures 1 and 2, this embodiment provides a temperature control pipeline assembly, which mainly includes a liquid inlet main line 121, a liquid return main line 122, a liquid inlet branch line 123, a liquid return branch line 124, a first-level liquid return pipe 1202 and a first-level liquid inlet pipe 1201; the liquid inlet main line 121 and the liquid return main line 122 are used to connect with the temperature control device 14. As shown in Figure 2, the liquid inlet main line 121 is mainly formed by splicing multiple three-level liquid inlet pipes 1205 through a first connecting pipe 1207, and one port of the first connecting pipe 1207 is used to connect with the liquid inlet of a liquid inlet branch line 123; the liquid return main line 122 is mainly formed by splicing multiple three-level liquid return pipes 1206 through a second connecting pipe 1208, and one port of the second connecting pipe 1208 is used to connect with the liquid outlet of a liquid return branch line 124; the liquid inlet branch line 123 is mainly formed by splicing multiple two-level liquid inlet pipes 1203 through The third connecting pipe 1209 is formed by splicing, and one end of the third connecting pipe 1209 is connected to the inlet of the primary liquid inlet pipe 1201. The liquid return branch pipe 124 is mainly formed by splicing multiple secondary liquid return pipes 1204 through the fourth connecting pipe 1210, and one end of the fourth connecting pipe 1210 is connected to the outlet of the primary liquid return pipe 1202. The outlet of the primary liquid inlet pipe 1201 is connected to the heat exchange inlet of the battery module, and the inlet of the primary liquid return pipe 1202 is connected to the heat exchange outlet of the battery module 13. The first connecting pipe 1207, the second connecting pipe 1208, the third connecting pipe 1209, and the fourth connecting pipe 1210 can all adopt tee joints.

[0134] The liquid inlet main line 121, the liquid return main line 122, the liquid inlet branch line 123 and the liquid return branch line 124 in the temperature control pipeline assembly 12 of this embodiment are all formed by splicing multiple sections of pipelines. At the same time, they are also detachably connected to the first-level liquid inlet pipe 1201 and the first-level liquid return pipe 1202, making the installation, disassembly and maintenance of the entire temperature control pipeline assembly 12 very convenient. During subsequent maintenance, it is only necessary to remove the pipeline connector of the relevant battery module without removing the entire temperature control pipeline assembly 12, making disassembly and maintenance convenient.

[0135] When installing the aforementioned pipelines, the single-channel liquid inlet branch line 123 and liquid return branch line 124 are installed horizontally and connected to the battery modules in the battery module unit via multiple first-level liquid inlet pipes 1201 and first-level liquid return pipes 1202. Multiple liquid inlet branch lines 123 and liquid return branch lines 124 are arranged in parallel, and the multiple liquid inlet branch lines and liquid return branch lines are vertically connected to the liquid inlet main line 121 and liquid return main line 122. In this case, the liquid inlet main line 121 and liquid return main line 122 are installed vertically, and the liquid inlet main line and liquid return main line are respectively arranged on both sides of the battery cluster. Placing the liquid inlet main line 121 and liquid return main line 122 on both sides of the battery cluster reduces the impact of condensation, pipe leakage, etc. on the electrical components of the energy storage device, thereby improving electrical safety. At the same time, the liquid inlet main line 121 and the liquid return main line 122 are arranged on both sides of the battery cluster, which does not occupy the space on the top of the battery cluster. The installation occupies a small space, making the temperature control pipeline assembly 12 highly integrated and convenient for on-site adjustment and maintenance of the pipeline.

[0136] As shown in Figure 2, during the specific connection, the liquid inlet main line 121, the liquid return main line 122, the liquid inlet branch line 123, and the liquid return branch line 124 can be installed in the same plane. This setting can improve the connectivity of the entire temperature control pipeline assembly 12 and the compactness of the pipeline layout, avoid pipeline stacking and crossing, which makes the connection inconvenient, and improves the convenience of installation and layout.

[0137] In this embodiment, the first-level liquid inlet pipe 1201 and the first-level liquid return pipe 1202 are both flexible pipes, specifically made of metal bellows. The flexible pipes reduce the installation errors between the first-level liquid inlet pipe, the first-level liquid return pipe, and the battery module, reduce on-site installation requirements, and further increase the installation convenience of the temperature control pipe assembly 12. At the same time, the ends of the flexible pipes are equipped with quick-connect connectors, which facilitate the sealed connection between the first-level liquid inlet pipe 1201 and the first-level liquid return pipe 1202 and the heat exchange inlet and heat exchange outlet of the battery module. In addition, the second-level liquid inlet pipe 1203, the second-level liquid return pipe 1204, the third-level liquid inlet pipe 1205, and the third-level liquid return pipe 1206 can also be made of flexible hoses, specifically metal bellows, which also reduces on-site installation requirements and further increases the installation convenience of the temperature control pipe assembly 12. In actual applications, the flexible connection allows the position of each pipe to be adjusted according to actual needs, improving the installability of each pipe.

[0138] The liquid inlet of the aforementioned liquid inlet branch line 123 and the liquid outlet of the liquid return branch line 124 can be located on the same side of the battery module or on different sides of the battery module, depending on the arrangement of the liquid inlet main line 121 and the liquid return main line 122 in the energy storage device. After the positions of the liquid inlet main line 121 and the liquid return main line 122 are determined, the ports not connected to the liquid inlet main line and the liquid return main line can be sealed with plugs.

[0139] In addition, when the liquid inlet of the liquid inlet branch line 123 and the liquid outlet of the liquid return branch line 124 are connected to the three-way joints of the liquid inlet main line 121 and the liquid return main line 122, the connection can be achieved specifically through a quick-connect connector 1212. The quick-connect connector 1212 is easy to install and can be directly plugged in and out without the need for tools, which can improve the convenience of installation or disassembly. In addition, the quick-connect connector 1212 can also have a two-way self-sealing function. During the process of plugging and unplugging the quick-connect connector 1212, the flow of liquid can be automatically cut off, so that when repairing the battery module and the temperature control pipeline assembly 12, there is no need to empty the heat transfer medium in each pipeline, which improves the convenience of maintenance and the detachability of the pipeline, facilitating the subsequent maintenance and replacement of the main pipeline.

[0140] As shown in FIG2 , in this embodiment, the diameters of the aforementioned pipes can also be set. Specifically, the flow areas of the first-level liquid inlet pipe 1201, the second-level liquid inlet pipe 1203, and the third-level liquid inlet pipe 1205 are gradually increased, while the flow areas of the first-level liquid return pipe 1202, the second-level liquid return pipe 1204, and the third-level liquid return pipe 1206 are gradually increased. In other words, the flow area of ​​the first-level liquid inlet pipe 1201 is less than the flow area of ​​the second-level liquid inlet pipe 1203, which is less than the flow area of ​​the third-level liquid inlet pipe 1205; the flow area of ​​the first-level liquid return pipe 1202 is less than the flow area of ​​the second-level liquid return pipe 1204, which is less than the flow area of ​​the third-level liquid return pipe 1206. This arrangement minimizes the flow deviation of the heat transfer medium used for heat exchange with each battery module, achieving as uniform a liquid delivery as possible, ensuring the most consistent heat exchange amount between each battery module, minimizing the temperature difference between each battery module, achieving more uniform heat exchange with the battery modules, reducing the temperature difference between the battery modules, and extending the service life of the battery modules.

[0141] As shown in FIG2 , the three-stage liquid inlet pipe 1205, the three-stage liquid return pipe 1206, the two-stage liquid inlet pipe 1203, and the two-stage liquid return pipe 1204 in this embodiment are covered with an insulation sleeve 1211. The insulation sleeve 1211 is nested outside the three-stage liquid inlet pipe 1205, the three-stage liquid return pipe 1206, the two-stage liquid inlet pipe 1203, and the two-stage liquid return pipe 1204. The insulation sleeve 1211 can reduce the heat loss of the high-temperature heat transfer medium and also reduce the influence of the external environment on the heat transfer medium in the pipeline. In addition, the outer walls of the three-stage liquid inlet pipe 1205, the three-stage liquid return pipe 1206, the two-stage liquid inlet pipe 1203, and the two-stage liquid return pipe 1204 can also be wrapped with insulation material. The insulation material can not only effectively prevent the heat loss of the heat transfer medium, thereby reducing energy consumption, but also prevent condensation on the pipe walls of each pipe, thereby extending the service life of the energy storage device. In addition, exhaust valves may be provided at the top of the liquid inlet main line 121 and the liquid return main line 122 , and the exhaust valves enhance the temperature control effect of the temperature control pipeline assembly 12 .

[0142] Example 2

[0143] As shown in Figures 3 to 5, this embodiment provides an energy storage device comprising a battery rack 11, multiple battery modules 13, and the temperature control pipe assembly 12 of Example 1. The multiple battery modules 13 are arranged horizontally to form a battery module unit, and the multiple battery module units are arranged vertically to form a battery cluster. The battery rack 11 is used to support the battery modules 13 in the energy storage device, so that the battery modules 13 are tightly arranged within the housing of the energy storage device. The battery rack 11 includes multiple mounting brackets 111 arranged vertically and vertical support beams 112 that securely connect the multiple mounting brackets 111. The mounting brackets 111 are used to insulate and support the battery module units. In the battery rack 11, the mounting brackets 111 can be a frame structure formed by welding I-beams and square steel pipes, and the vertical support beams 112 are formed by angle steel. The multiple mounting brackets 111 and the vertical support beams 112 are mounted using a sliding mechanism.

[0144] As shown in Figure 4, during the specific installation, the battery module unit is installed on the mounting bracket 111. The heat exchange inlet 131 of the battery module 13 is connected to the outlet of the first-level liquid inlet pipe 1201, and the heat exchange outlet 132 is connected to the inlet of the first-level liquid return pipe 1202. The liquid inlet branch pipe 123 and the liquid return branch pipe 124 are both embedded and installed in the mounting bracket 111 of the battery rack 11. The liquid inlet main pipe 121 and the liquid return main pipe 122 are both embedded and installed in the vertical support beam 112 of the battery rack 11, and can be specifically embedded in the angle steel. The pipelines in the above-mentioned temperature control pipeline assembly 12 are embedded and installed in the battery rack 11, so that the temperature control pipeline assembly 12 occupies a small space and the degree of integration of the entire energy storage device is better.

[0145] As shown in FIG5 , during installation, the liquid inlet branch line 123 and the liquid return branch line 124 can be installed in parallel. A pressure plate 113 is also provided on the mounting bracket 111 to secure the liquid inlet branch line 123 and the liquid return branch line 124 to the mounting bracket 111. In this embodiment, the shape of the pressure plate 113 is not critical; a rectangular plate with a relatively simple structure can be employed. During installation, multiple fixing blocks are mounted on the mounting bracket 111. The fixing blocks are secured to the I-shaped steel web of the mounting bracket 111 by welding, bonding, or screws. Subsequently, the pressure plate 113 is removably mounted on the fixing blocks by bolts or other means. The width of the pressure plate 113 is generally not critical; its length must meet the following requirements: it must be at least greater than the distance between the liquid inlet branch line 123 and the liquid return branch line 124, securing the liquid inlet branch line 123 and the liquid return branch line 124 to the mounting bracket 111. After the liquid inlet branch pipe 123 and the liquid return branch pipe 124 are fixed in the above-mentioned manner, there is no need to use pipe clamps or the like for subsequent fixation. At the same time, the liquid inlet branch pipe 123 and the liquid return branch pipe 124 are reliably fixed on the I-beam using the pressure plate 113, so that the liquid inlet branch pipe 123 and the liquid return branch pipe 124 will not shake in the mounting bracket 111, thereby avoiding problems such as loose joints caused by shaking.

[0146] As shown in Figures 3 and 4, after the above-mentioned temperature control pipeline assembly 12 is assembled, it is connected to the temperature control device 14. The temperature control machine of the temperature control device 14 has a liquid return port and a liquid discharge port. The liquid inlet main line 121 is connected to the liquid discharge port, and the liquid return main line 122 is connected to the liquid return port. The liquid inlet of each liquid inlet branch line 123 is connected to the liquid inlet main line 121, and the liquid outlet of each liquid return branch line 124 is connected to the liquid return main line 122. The liquid inlet branch line 123 is connected to the heat exchange inlet 131 of the multiple battery modules 13 through the first-level liquid inlet pipe 1201, and the liquid return branch line 124 is connected to the heat exchange outlet 132 of the multiple battery modules 13 through the first-level liquid return pipe 1202. In this way, the heat transfer medium discharged from the discharge port of the temperature controller is sent to the heat exchange device of the battery module 13 through the liquid inlet main line 121, the liquid inlet branch line 123 and the first-level liquid inlet pipe 1201. The heat transfer medium takes away the heat from the battery module 13 and then returns to the temperature controller through the first-level return liquid pipe 1202, the return liquid branch line 124, and the return liquid main line 122. This cycle is repeated to lower the temperature of the battery module 13, so that the battery module 13 operates within a suitable temperature range.

[0147] In order to meet the different capacity requirements of energy storage equipment, existing energy storage equipment sets up multiple battery modules in series and parallel. In order to improve energy density, multiple battery modules can be arranged in an array. For example, multiple battery modules are arranged in sequence in the horizontal direction to form a battery module unit, and multiple battery module units are arranged in sequence in the vertical direction to form a battery cluster. Multiple battery clusters are arranged linearly in the battery compartment, and each energy storage box includes multiple battery compartments. In order to ensure the safe and reliable operation of the energy storage equipment, the energy storage equipment is provided with a temperature control system to control the temperature of each battery module in the energy storage equipment, so that each battery module always operates in a suitable temperature environment. At this time, it is urgent to provide a temperature control pipeline assembly to provide a more balanced heat transfer medium for each battery module in the above-mentioned energy storage equipment, so that each battery module in the energy storage equipment can operate stably.

[0148] Based on this, the present application provides a temperature control pipeline assembly, in which the liquid inlet pipeline unit and the liquid return pipeline unit in the temperature control pipeline assembly are connected and combined through a multi-stage pipeline, so that the heat transfer medium flowing out of the temperature control device is diverted step by step and evenly distributed to each battery module, and the heat transfer medium flow allocated to each battery module is balanced, so that each battery cluster and each battery module in the battery cluster has a good and balanced heat dissipation effect, thereby improving the working stability and service life of the energy storage equipment.

[0149] Example 3

[0150] As shown in Figures 8 to 10, this embodiment provides a temperature control pipeline assembly for use in energy storage equipment. In order to meet the different capacity requirements of energy storage equipment, existing energy storage equipment arranges multiple battery modules 241 in series and parallel. The battery module 241 is formed by connecting multiple single cells in parallel or in series. A protective shell for protecting each single cell is provided on the outside of the battery module 241. In some cases, the protective shell can also be omitted. In order to improve energy density, multiple battery modules 241 are arranged in sequence in the horizontal direction to form a battery module unit 25. Subsequently, multiple battery module units 25 are arranged in sequence in the vertical direction to form a battery cluster 24. Multiple battery clusters 24 are linearly arranged in a battery compartment 23. Each energy storage device includes at least two battery compartments 23.

[0151] As shown in Figure 10, during the charge and discharge operation of the battery module 241, the battery module 241 itself will generate a large amount of heat. If the battery module 241 is not cooled in time, the performance of the battery module 241 will decline. At present, liquid cooling is mainly used to cool the battery module 241. When cooling the battery module 241 by liquid cooling, a heat exchange device is set on each battery module 241. The heat exchange device can be a liquid cooling plate or liquid cooling tube that contacts each single battery shell, or contacts each single battery pole, or contacts the protective shell. The above-mentioned liquid cooling tube or liquid cooling plate has an inlet and an outlet, which serve as the heat exchange inlet 2411 and the heat exchange outlet 2412 of the battery module 241, and serve as an interface for connecting to the temperature control pipeline assembly in the temperature control system.

[0152] This embodiment mainly provides a temperature control pipeline assembly, which includes a liquid inlet pipeline unit 21 and a liquid return pipeline unit 22. The heat transfer medium cools the battery module 241 through a circulation loop formed by the liquid inlet pipeline unit 21 and the liquid return pipeline unit 22. The liquid inlet pipeline unit 21 and the liquid return pipeline unit 22 are connected by a multi-stage pipeline combination, so that the heat transfer medium flowing out of the temperature control device 27 is evenly distributed to each battery module 241 step by step, so that each battery module unit 25 has a good and balanced heat dissipation effect.

[0153] The specific components of the liquid inlet pipeline unit 21 and the liquid return pipeline unit 22 are as follows:

[0154] As shown in Figures 6, 8 and 9, the liquid inlet pipeline unit 21 includes a six-level liquid inlet main line 211, a five-level liquid inlet main line 212, a four-level liquid inlet main line 213, a three-level liquid inlet main line 214, a two-level liquid inlet branch line 215 and a first-level liquid inlet pipe 216; the inlet of the six-level liquid inlet main line 211 is used to connect to the temperature control device 27; multiple five-level liquid inlet main lines 212 are connected to the six-level liquid inlet main line 211, and each five-level liquid inlet main line 212 provides heat transfer medium to each battery compartment 23 respectively, that is, multiple five-level liquid inlet main lines 212 divert the heat transfer medium in the six-level liquid inlet main line 211 to multiple battery compartments 23; multiple four-level liquid inlet main lines 213 are connected to the five-level liquid inlet main line 212, and each four-level liquid inlet main line 213 provides heat transfer medium to each battery cluster 24 respectively, that is, multiple four-level liquid inlet main lines 213 divert the heat transfer medium in the five-level liquid inlet main line The heat transfer medium in 212 is diverted to multiple battery clusters 24; multiple tertiary liquid inlet main lines 214 are connected to the fourth-level liquid inlet main line 213, and each third-level liquid inlet main line 214 provides heat transfer medium to each battery module unit 25 respectively, that is, multiple tertiary liquid inlet main lines 214 divert the heat transfer medium in the fourth-level liquid inlet main line 213 to multiple battery module units 25; multiple secondary liquid inlet branch lines 215 are connected to the third-level liquid inlet main line 214, and each second-level liquid inlet branch line 215 provides heat transfer medium to each battery module 241 respectively; that is, multiple secondary liquid inlet branch lines 215 divert the heat transfer medium in the third-level liquid inlet main line 214 to multiple battery modules 241; the inlets of multiple first-level liquid inlet pipes 216 are respectively connected to the second-level liquid inlet branch lines 215, and the outlet of the first-level liquid inlet pipe 216 is used to connect to the heat exchange inlet 2411 of the battery module 241.

[0155] The liquid return pipeline unit 22 includes a six-stage liquid return main line 221, a five-stage liquid return main line 222, a four-stage liquid return main line 223, a three-stage liquid return main line 224, a two-stage liquid return branch line 225, and a first-stage liquid return pipe 226; the inlet of the first-stage liquid return pipe 226 is used to connect to the heat exchange outlet 2412 of the battery module 241, and the two-stage liquid return branch line 225 is used to collect the heat transfer medium in the multiple first-stage liquid return pipes 226 into the three-stage liquid return main line 224; the three-stage liquid return pipe 226 is used to connect to the heat exchange outlet 2412 of the battery module 241, and the two-stage liquid return branch line 225 is used to collect the heat transfer medium in the multiple first-stage liquid return pipes 226 into the three-stage liquid return main line 224; The main line 224 is used to collect the heat transfer medium in multiple secondary liquid return branch lines 225 into the fourth-level liquid return main line 223; the fourth-level liquid return main line 223 is used to collect the heat transfer medium in multiple third-level liquid return main lines 224 into the fifth-level liquid return main line 222; the fifth-level liquid return main line 222 is used to collect the heat transfer medium in multiple fourth-level liquid return main lines 223 into the sixth-level liquid return main line 221, and the outlet of the sixth-level liquid return main line 221 is used to be connected to the temperature control device 27.

[0156] The aforementioned liquid inlet piping unit 21 and liquid return piping unit 22 are connected via a modular system of multiple pipes, which divide the heat transfer medium in the temperature control device 27 in multiple stages. This allows the heat transfer medium to flow through the liquid inlet piping unit 21 into the multiple battery modules 241 in a most even manner. This allows the heat transfer medium, after being divided step by step, to simultaneously cool and dissipate heat from the multiple battery modules 241. The heat transfer medium then removes heat from the battery modules and flows through the liquid return piping unit 22 into the temperature control device 27, continuing this cycle to achieve temperature control of the battery modules 241. The aforementioned liquid inlet piping unit 21 and liquid return piping unit 22, through their step-by-step flow diversion design, can continuously and stably cool the battery modules in the multiple battery clusters 24.

[0157] In this embodiment, the multiple five-stage liquid return main lines 222 have the same length, the multiple four-stage liquid return main lines 223 have the same length, and the multiple three-stage liquid return main lines 224 have the same length. Through the above arrangement, the heat transfer medium, after being diverted step by step, flows through each battery module 241 along a substantially identical or similar path. Consequently, the heat transfer medium flowing through each battery module 241 has approximately the same flow rate and flow rate, resulting in a substantially consistent cooling effect on each battery module 241. This ensures that each battery module 241 can be cooled and dissipated simultaneously, stably, and evenly, thereby ensuring the safety of the energy storage device during use.

[0158] In this embodiment, the diameters of the above-mentioned pipelines can also be set. Specifically, the flow areas of the six-level liquid inlet main line 211, the five-level liquid inlet main line 212, the four-level liquid inlet main line 213, the three-level liquid inlet main line 214, the two-level liquid inlet branch line 215 and the one-level liquid inlet pipe 216 are gradually reduced, and the flow areas of the six-level liquid return main line 221, the five-level liquid return main line 222, the four-level liquid return main line 223, the three-level liquid return main line 224, the two-level liquid return branch line 225 and the one-level liquid return pipe 226 are gradually reduced. This arrangement makes the flow deviation of the heat transfer medium for heat exchange with each battery module 241 smaller, and achieves uniform liquid delivery as much as possible. The heat exchange amount between each battery module 241 is as consistent as possible, so that the temperature difference between each battery module 241 is as small as possible, achieving more uniform heat exchange for the battery module 241, reducing the temperature difference of the battery module 241, and improving the service life of the battery module 241.

[0159] As shown in Figure 7, the three-stage liquid inlet main line 214, the three-stage liquid return main line 224, the two-stage liquid inlet branch line 215 and the two-stage liquid return branch line 225 in the temperature control pipeline assembly of this embodiment are all formed by splicing multiple sections of pipelines, making the temperature control pipeline assembly not only easy to install and disassemble on site, achieving the purpose of rapid installation and disassembly, but also convenient for subsequent adjustment and maintenance of the temperature control pipeline assembly on site. During subsequent maintenance, it is only necessary to remove the pipeline connector of the relevant battery module 241 without removing the entire temperature control pipeline assembly. This makes disassembly and maintenance convenient, reduces maintenance costs, and improves maintenance efficiency. Among them, the specific composition of the three-stage liquid inlet main line 214, the three-stage liquid return main line 224, the two-stage liquid inlet branch line 215 and the two-stage liquid return branch line 225 is as follows:

[0160] As shown in FIG7 , the tertiary liquid inlet main line 214 is mainly formed by alternately splicing a plurality of liquid inlet branch pipe sections 2141 and a plurality of third connecting pipes 2142, and one port of the third connecting pipe 2142 is used to connect to the liquid inlet of a secondary liquid inlet branch pipe 215; the tertiary liquid return main line 224 is mainly formed by alternately splicing a plurality of liquid return branch pipe sections 2241 and a plurality of fourth connecting pipes 2242, and one port of the fourth connecting pipe 2242 is used to connect to the liquid outlet of a secondary liquid return branch pipe 225; the secondary liquid inlet branch pipe 215 is mainly formed by alternately splicing a plurality of liquid inlet branch pipe sections 2151 and a plurality of The secondary liquid return branch line 225 is primarily formed by alternately splicing together multiple first connecting pipes 2152, with one end of the first connecting pipe 2152 connected to the inlet of the primary liquid inlet pipe 216. The secondary liquid return branch line 225 is primarily formed by alternately splicing together multiple liquid return branch pipe sections 2251 and multiple second connecting pipes 2252, with one end of the second connecting pipe 2252 connected to the outlet of the primary liquid return pipe 226. The outlet of the primary liquid inlet pipe 216 is connected to the heat exchange inlet 2411 of the battery module 241, while the inlet of the primary liquid return pipe 226 is connected to the heat exchange outlet 2412 of the battery module 241. The aforementioned third connecting pipe 2142, fourth connecting pipe 2242, first connecting pipe 2152, and second connecting pipe 2252 may all utilize tee joints.

[0161] During the specific installation of the aforementioned pipelines, a single secondary liquid inlet branch line 215 and a secondary liquid return branch line 225 are installed horizontally and connected to the battery modules 241 in the battery module unit 25 via multiple primary liquid inlet pipes 216 and primary liquid return pipes 226. Multiple secondary liquid inlet branch lines 215 and secondary liquid return branch lines 225 are arranged in parallel and vertically connected to the fourth-level liquid inlet main line 213 and the fifth-level liquid return main line 222. At this time, the third-level liquid inlet main line 214 and the third-level liquid return main line 224 are installed vertically and are respectively arranged on both sides of each battery cluster 24. Placing the third-level liquid inlet main line and the third-level liquid return main line 224 on both sides of the battery cluster 24 reduces the impact of condensation, pipeline leakage, etc. on the electrical components of the energy storage device, thereby improving electrical safety.

[0162] At the same time, the six-stage liquid inlet main line 211, the five-stage liquid inlet main line 212, the four-stage liquid inlet main line 213, the six-stage liquid return main line 221, the five-stage liquid return main line 222, and the four-stage liquid return main line 223 can all be located at the top of the battery cluster 24. This arrangement occupies less installation space, resulting in a high degree of integration of the temperature control pipeline assembly and convenient on-site adjustment and maintenance of the pipelines. Furthermore, this arrangement can improve the connectivity of the entire temperature control pipeline assembly and the compactness of the pipeline layout, avoiding the inconvenience of connecting stacked and crossed pipelines, thereby improving the convenience of installation and layout.

[0163] As shown in FIG7 , in this embodiment, the first-level liquid inlet pipe 216 and the first-level liquid return pipe 226 are both flexible pipes, specifically made of metal bellows. The flexible pipes reduce the installation error between the first-level liquid inlet pipe 216, the first-level liquid return pipe 226 and the battery module 241, reduce on-site installation requirements, and further increase the installation convenience of the temperature control pipe assembly. At the same time, the ends of the flexible pipes are provided with quick-connect connectors, which facilitate the sealed connection between the first-level liquid inlet pipe 216, the first-level liquid return pipe 226 and the heat exchange inlet 2411 and the heat exchange outlet 2412 of the battery module 241. In addition, the above-mentioned liquid inlet branch pipe section 2151, the liquid return branch pipe section 2251, the liquid inlet branch pipe section 2141, and the liquid return branch pipe section 2241 can also be made of flexible hoses, specifically metal bellows, which also reduces on-site installation requirements and further increases the installation convenience of the temperature control pipe assembly. In practical applications, flexible connections enable the positions of each pipeline to be adjusted accordingly according to actual needs, thereby improving the installability of each pipeline.

[0164] The liquid inlet of the above-mentioned secondary liquid inlet branch line 215 and the liquid outlet of the secondary liquid return branch line 225 can be located on the same side of the battery module 241, or on different sides of the battery module 241. Specifically, according to the arrangement of the tertiary liquid inlet main line 214 and the tertiary liquid return main line 224 in the energy storage device, after the positions of the tertiary liquid inlet main line 214 and the tertiary liquid return main line 224 are determined, the ports not connected to the tertiary liquid inlet main line 214 and the tertiary liquid return main line 224 can be sealed with plugs.

[0165] In addition, when the liquid inlet of the secondary liquid inlet branch line 215 and the liquid outlet of the secondary liquid return branch line 225 are connected to the tertiary liquid inlet main line 214 and the tertiary liquid return main line 224, the connection can be achieved specifically through a quick-connect connector 217. The quick-connect connector 217 is easy to install and can be directly plugged in and out without the need for tools, which can improve the convenience of installation or disassembly. In addition, the quick-connect connector 217 can also have a two-way self-sealing function, which can automatically cut off the flow of liquid during the process of plugging and unplugging the quick-connect connector, so that when repairing the battery module and the temperature control pipeline assembly, there is no need to empty the heat transfer medium in each pipeline, which improves the convenience of maintenance and the detachability of the pipeline, facilitating the subsequent maintenance and replacement of the main pipeline.

[0166] As shown in Figure 10 , the liquid inlet branch section 2141, the liquid return branch section 2241, the liquid inlet branch section 2151, and the liquid return branch section 2251 in this embodiment are covered with an insulation jacket 218. This insulation jacket 218 reduces heat loss from the high-temperature heat transfer medium and also reduces the impact of the external environment on the heat transfer medium in the pipeline. Furthermore, exhaust valves can be installed at the top of the three-stage liquid inlet main line and the three-stage liquid return main line to enhance the temperature control effect of the temperature control pipeline assembly.

[0167] Example 4

[0168] As shown in Figures 8 to 10, this embodiment provides an energy storage device comprising a battery rack 26, multiple battery modules 241, and a temperature control system. The temperature control system includes a temperature control device 27 and the temperature control piping assembly of Example 3. Multiple battery modules 241 are arranged horizontally to form a battery module unit 25. Multiple battery module units 25 are arranged vertically to form a battery cluster 24. Multiple battery clusters 24 are linearly arranged within a battery compartment 23. Each energy storage case 28 includes at least two battery compartments 23. The temperature control device 27 is positioned on the same side of each battery cluster 24 within the energy storage case 28. Positioning the temperature control device 27 on one side of each battery cluster 24 optimizes the spatial layout within the energy storage case 28 and reduces the risk of leakage from the temperature control device 27. Furthermore, the corresponding temperature control piping layout ensures that each battery cluster 24 has a comparable cooling effect, thereby extending the service life of the entire energy storage device.

[0169] The above-mentioned temperature control pipeline assembly and the temperature control device 27 form a temperature control system to control the temperature of the battery module. The temperature control device processes the heat generated by the battery module, and mainly includes a temperature controller and a circulation pump; wherein the temperature controller is a device with heating and / or cooling functions, which is used to increase or decrease the temperature of the heat transfer medium in the temperature control pipeline assembly (specifically, water, ethylene glycol / water, propylene glycol / water, methanol / water, ethanol / water, calcium formate / water, etc.). For example, the temperature controller is specifically a heating and cooling machine or a refrigerator with a compressor, etc., and the circulation pump is mainly used to circulate the heat transfer medium in the temperature control pipeline assembly. In this embodiment, the above-mentioned temperature controller and circulation pump are an integrated device.

[0170] The battery rack 26 in this embodiment is used to support the battery modules 241 in the energy storage device so that the battery modules 241 are tightly arranged in the box of the energy storage device. The battery rack 26 includes a plurality of mounting brackets 261 arranged in the vertical direction, and a vertical support beam that fixedly connects the plurality of mounting brackets 261; the mounting brackets 261 are used to insulate and support the battery module units 25. In the above-mentioned battery rack 26, the mounting brackets 261 can specifically be a frame structure, which is formed by welding I-shaped steel and square steel pipes, and the vertical support beam is formed by angle steel. The plurality of mounting brackets 261 and the vertical support beam are installed in a sliding manner.

[0171] As shown in Figure 10, during the specific installation, the battery module unit 25 is installed on the mounting bracket 261. The heat exchange inlet 2411 of the battery module 241 is connected to the outlet of the first-level liquid inlet pipe 216, and the heat exchange outlet 2412 is connected to the inlet of the first-level liquid return pipe 226. The second-level liquid inlet branch pipe 215 and the second-level liquid return branch pipe 225 are both embedded and installed in the mounting bracket 261 of the battery rack 26. The third-level liquid inlet main pipe 214 and the third-level liquid return main pipe 224 are both embedded and installed in the vertical support beam of the battery rack 26. The pipes in the above-mentioned temperature control pipe assembly are embedded and installed in the battery rack 26, so that the temperature control pipe assembly occupies less space and the degree of integration of the entire energy storage device is better. During specific installation, the secondary liquid inlet branch pipeline 215 and the secondary liquid return branch pipeline 225 can be installed in parallel. At the same time, a protective plate is also provided on the installation bracket 261 to protect the secondary liquid inlet branch pipeline 215 and the secondary liquid return branch pipeline 225 on the installation bracket 261.

[0172] After the above-mentioned temperature control pipeline assembly is assembled, it is connected to the temperature control device 27. The temperature control machine of the temperature control device 27 has a liquid return port and a liquid discharge port. The six-stage liquid inlet main line 211 is connected to the liquid discharge port, and the six-stage liquid return main line 221 is connected to the liquid return port. The secondary liquid inlet branch line 215 is connected to the heat exchange inlet 2411 of the multiple battery modules 241 through the primary liquid inlet pipe 216, and the secondary liquid return branch line 225 is connected to the heat exchange outlet 2412 of the multiple battery modules 241 through the primary liquid return pipe 226. In this way, the heat transfer medium discharged from the discharge port of the temperature controller is transported to the heat exchange device of the battery module 241 via the sixth-level liquid inlet main line 211, the fifth-level liquid inlet main line 212, the fourth-level liquid inlet main line 213, the third-level liquid inlet main line 214, the second-level liquid inlet branch line 215, and the first-level liquid inlet pipe 216. The heat transfer medium takes away the heat from the battery module 241 and then returns to the temperature control device 27 via the first-level liquid return pipe 226, the second-level liquid return branch line 225, the third-level liquid return main line 224, the fourth-level liquid return main line 223, the fifth-level liquid return main line 222, and the sixth-level liquid return main line 221. This cycle is repeated to reduce the temperature of the battery module 241, so that the battery module 241 operates within a suitable temperature range.

[0173] In order to meet the different capacity requirements of energy storage equipment, existing energy storage equipment sets up multiple battery modules in series and parallel. The above-mentioned battery module refers to a battery module formed by connecting multiple single cells in parallel or in series. A protective shell is provided on the outside of the battery module to protect the battery module. In some cases, the shell can also be omitted. The above-mentioned battery module has a heat exchange device, which can be a liquid cooling plate or liquid cooling pipe in contact with each single cell shell, or in contact with each single cell pole, or in contact with the protective shell. The above-mentioned liquid cooling pipe or liquid cooling plate has an inlet and an outlet, which serve as the heat exchange inlet and heat exchange outlet of the battery module, and are connected to the temperature control pipeline assembly in the temperature control system to control the temperature of the battery module.

[0174] To ensure the safe and reliable operation of the energy storage equipment, the energy storage equipment is equipped with a temperature control system to control the temperature of each battery module in the energy storage equipment. The existing temperature control system realizes the temperature control of multiple battery modules by setting up multi-stage liquid cooling pipelines. In the above-mentioned multi-stage liquid cooling pipelines, whole pipes are generally used for the production and connection of the liquid cooling pipelines. This type of pipeline setting can increase the sealing of the liquid cooling pipelines. However, when using whole pipes for production and installation, the installation of each pipeline is more difficult, and the installation position of each pipeline must be accurately guaranteed to avoid installation errors. At the same time, during on-site maintenance, all liquid cooling pipelines need to be disassembled before the relevant battery modules and liquid cooling pipelines can be repaired, which makes maintenance time laborious and inconvenient. In addition, the various pipelines in the existing energy storage equipment occupy space in the energy storage equipment box, which also affects the energy density of the energy storage equipment.

[0175] The present application provides a battery module mounting bracket that integrates a temperature control pipe assembly into the bracket body, thereby minimizing the space occupied by the temperature control pipe assembly and improving the integration of the entire battery module mounting bracket. Furthermore, in the temperature control pipe assembly, the liquid inlet branch pipe and the liquid return branch pipe are formed by splicing multiple sections of pipes through tee joints, making the temperature control pipe assembly not only easy to install and disassemble on site, but also convenient for subsequent on-site adjustment and maintenance of the temperature control pipe assembly, achieving the purpose of rapid installation and disassembly, while also reducing maintenance costs and improving maintenance efficiency.

[0176] Example 5

[0177] As shown in FIG. 11 to FIG. 14 , this embodiment provides a battery module mounting bracket for supporting the battery modules 33 in the energy storage device so that the battery modules 33 are closely arranged in the box of the energy storage device. The battery module mounting bracket includes a bracket body 31 and a temperature control pipe assembly 32; the bracket body 31 is used to insulate and support at least one battery module 33; the temperature control pipe assembly 32 includes a first liquid inlet pipe 321, a first liquid return pipe 322, a second liquid inlet pipe 323 and a second liquid return pipe 324; multiple second liquid inlet pipes 323 are connected through a first three-way joint 325 to form a liquid inlet branch pipe, and multiple second liquid return pipes 324 are connected through a second three-way joint 326 to form a liquid return branch pipe, and the liquid inlet branch pipe and the liquid return branch pipe are both embedded in the mounting bracket body 31; one end of the first liquid inlet pipe 321 is used to be connected to the heat exchange inlet 331 of the battery module 33, and the other end is connected to the second liquid inlet pipe 323 through the first three-way joint 325; one end of the first liquid return pipe 322 is used to be connected to the heat exchange outlet 332 of the battery module 33, and the other end is connected to the second liquid return pipe 324 through the second three-way joint 326. That is to say, in the above-mentioned liquid inlet branch pipeline, the two ports in the first three-way joint 325 are respectively connected to the secondary liquid inlet pipes 323 on both sides thereof, and the other port is used to be connected to the primary liquid inlet pipe 321; in the liquid return branch pipeline, the two ports in the second three-way joint 326 are respectively connected to the secondary liquid return pipes 324 on both sides thereof, and the other port is used to be connected to the primary liquid return pipe 322.

[0178] Part of the pipes in the above-mentioned temperature control pipe assembly 32 are embedded and installed in the bracket body 31, which not only makes the entire battery module mounting bracket more integrated, but also the above-mentioned temperature control pipe assembly 32 adopts a multi-section pipe splicing connection to facilitate on-site assembly and maintenance.

[0179] As shown in Figure 11, in order to facilitate processing and assembly and to reduce the weight of the bracket body 31, the bracket body 31 in this embodiment is a frame structure, which mainly includes two first support beams 311 and two second support beams 312; the two first support beams 311 and the two second support beams 312 are connected end to end to form a hollow frame support body. Under the premise of meeting the requirements of use strength and facilitating on-site processing and production, the bracket body 31 is generally assembled using steel sections, that is, the steel sections are welded or bolted to form the bracket body 31. Since the above-mentioned liquid inlet branch line and liquid return branch line are embedded in the mounting bracket body 31, some of the support beams in the bracket body 31 need to be made of I-shaped steel and C-shaped steel. In this embodiment, at least one first support beam 311 in the bracket body 31 is made of I-shaped steel, and the liquid inlet branch pipeline and the liquid return branch pipeline are embedded in one side of the I-shaped steel, so that the liquid inlet branch pipeline and the liquid return branch pipeline do not occupy additional installation space in the energy storage box.

[0180] As shown in Figure 13, in order to make it possible for the mounting bracket on which the battery module 33 is mounted to be easily installed in place or removed for maintenance, the battery module mounting bracket is generally installed in a sliding manner with the battery rack in the energy storage device. At this time, a roller 313 can be provided on the second support beam 312 to achieve the above function. Specifically, the second support beam 312 can be made of a square steel pipe with a plurality of through slots provided at the bottom of the square steel pipe. The roller 313 is installed in the square steel pipe, and its bottom extends out of the through slots on the square steel pipe, so that it can slide on the battery rack in the energy storage device. The battery module 33 can be easily installed in place by the roller 313. After installation, a limiter can be used to fix the battery module mounting bracket on the first support beam 311.

[0181] The liquid inlet branch pipeline and the liquid return branch pipeline in the temperature control pipeline assembly in this embodiment are formed by splicing multiple sections of pipelines. At the same time, they are also detachably connected to the first-level liquid inlet pipe 321 and the first-level liquid return pipe 322, making the installation, disassembly and maintenance of the entire temperature control pipeline assembly very convenient. During subsequent maintenance, it is only necessary to remove the liquid cooling pipeline connector of the relevant battery module without removing the entire temperature control pipeline assembly.

[0182] After the temperature control pipeline assembly 32 is connected, the liquid inlet of the liquid inlet branch pipeline and the liquid outlet of the liquid return branch pipeline are connected to the external liquid supply main pipeline and the liquid return main pipeline through quick-connect connectors to complete the connection of the temperature control system. The quick-connect connector is easy to install and can be directly plugged in and out without tools, which can improve the convenience of installation or disassembly. In addition, the quick-connect connector can also have a two-way self-sealing function. During the process of plugging and unplugging the quick-connect connector, the flow of liquid can be automatically cut off, so that when the battery module and the temperature control pipeline assembly are repaired, there is no need to empty the heat transfer medium in each pipeline, which improves the convenience of maintenance and the detachability of the pipeline, facilitating the subsequent maintenance and replacement of the main pipeline. In the specific setting, the liquid inlet of the liquid inlet branch pipeline and the liquid outlet of the liquid return branch pipeline can be located on the same side of the bracket body 31, or on different sides of the bracket body 31, depending on the arrangement of the liquid supply main pipeline and the liquid return main pipeline in the energy storage device. After determining the positions of the main liquid supply and return lines, the ports not connected to the main liquid supply and return lines can be sealed with plugs. Furthermore, the liquid inlet of the aforementioned branch liquid supply line and the liquid outlet of the branch liquid return line can be extended to the exterior of the bracket body 31, thereby facilitating connection to the main liquid supply and return lines from the exterior of the bracket body 31.

[0183] The first-level liquid inlet pipe 321 and the first-level liquid return pipe 322 are both flexible pipes, specifically made of metal bellows. The flexible pipes reduce the installation errors between the first-level liquid inlet pipe 321, the first-level liquid return pipe 322 and the battery module 33, the first three-way joint 325, and the second three-way joint 326, thereby reducing on-site installation requirements and further increasing the installation convenience of the temperature control pipe assembly 32. At the same time, the ends of the flexible pipes are provided with quick-connect connectors, which facilitate the sealed connection between the first-level liquid inlet pipe 321, the first-level liquid return pipe 322 and the heat exchange inlet 331 and the heat exchange outlet 332 of the battery module 33. In addition, the second-level liquid inlet pipe 323 and the second-level liquid return pipe 324 can also be made of flexible hoses, specifically metal bellows, which also reduces on-site installation requirements and further increases the installation convenience of the temperature control pipe assembly 32.

[0184] As shown in Figure 12, the secondary liquid inlet pipe 323 and the secondary liquid return pipe 324 in this embodiment are covered with an insulation sleeve 327. This insulation sleeve 327 is nested outside the secondary liquid inlet pipe 323 and the secondary liquid return pipe 324, not only reducing the heat loss of the high-temperature coolant, but also reducing the coolant in the pipes from being affected by the external environment. Furthermore, the outer walls of the secondary liquid inlet pipe 323 and the secondary liquid return pipe 324 can also be wrapped with insulation material. This insulation material effectively prevents the loss of cold or heat from the heat transfer medium, reducing energy consumption, and prevents condensation on the pipe walls of each pipe, thereby extending the service life of the energy storage device.

[0185] As shown in Figure 13, when the aforementioned inlet and return branches are embedded in the first support beam 311, they can be embedded in the same side of the I-beam. During installation, the inlet and return branches can be installed in parallel. A pressure plate 34 is also provided on the first support beam 311 to secure the inlet and return branches to the first support beam 311. In this embodiment, the shape of the pressure plate 34 is not critical; a relatively simple rectangular plate can be employed. During installation, multiple fixing blocks 341 are mounted on the first support beam 311. The fixing blocks 341 are secured to the web of the I-beam by welding, bonding, or screws. The pressure plates 34 are then removably mounted to the fixing blocks 341 using bolts or other means. The width of the pressure plates 34 is generally not critical; their length must be at least greater than the distance between the inlet and return branches, securing the inlet and return branches to the first support beam 311. After the liquid inlet branch pipeline and the liquid return branch pipeline are fixed in the above-mentioned manner, there is no need to use pipe clamps or the like for subsequent fixing. At the same time, after the liquid inlet branch pipeline and the liquid return branch pipeline are securely fixed on the I-steel using the pressure plate 34, the liquid inlet branch pipeline and the liquid return branch pipeline will not shake in the bracket body 31, thereby avoiding problems such as loose joints caused by shaking.

[0186] As shown in FIG14 , the battery module mounting bracket in this embodiment also includes a U-shaped guard plate 35. The U-shaped guard plate 35 is arranged on the side of the first support beam 311 where the secondary liquid inlet pipe 323 and the secondary liquid return pipe 324 are installed, forming a protective space with the I-shaped steel. The secondary liquid inlet pipe 323, the secondary liquid return pipe 324, and most of the pipe joints in the temperature control pipe assembly 32 are installed in this protective space. During the installation or removal and transportation of the battery module 33, the pipe joints are protected to avoid damage to the pipe joints. At the same time, the U-shaped guard plate 35 has an avoidance gap 351 through which the primary liquid inlet pipe 321 and the primary liquid return pipe 322 pass. The primary liquid inlet pipe 321 and the primary liquid return pipe 322 pass through the avoidance gap 351 and are connected to the battery module 33. Since the U-shaped guard plate 35 does not need to bear pressure, it can be directly fastened to the first support beam 311 during installation. In addition, the U-shaped guard plate 35 is arranged on one side of the bracket body 31, covering the temperature control pipe assembly 32 in its inner cavity, and also has the characteristic of aesthetics.

[0187] When manufacturing the battery module mounting bracket, the bracket body 31 is first fabricated using steel sections through welding or other methods. Subsequently, the battery module 33 is mounted on the bracket body 31. Finally, the primary liquid inlet pipe 321, the primary liquid return pipe 322, the secondary liquid inlet pipe 323, the secondary liquid return pipe 324, and the like are connected to form a temperature control pipe assembly 32. Finally, the primary liquid inlet pipe 321 and the primary liquid return pipe 322 are connected to the battery module 33. Alternatively, the temperature control pipe assembly 32 can be pre-integrated into the bracket body 31, and the primary liquid inlet pipe 321, the primary liquid return pipe 322, the secondary liquid inlet pipe 323, and the secondary liquid return pipe 324 are connected. When the battery module 33 is assembled with the bracket body 31, it is only necessary to connect the primary liquid inlet pipe 321 to the heat exchange inlet 331 of the battery module 33 and the primary liquid return pipe 322 to the heat exchange outlet 332 of the battery module 33.

[0188] Example 6

[0189] As shown in FIG15 , the battery module mounting bracket in this embodiment is similar to that in Example 5. Unlike the battery module mounting bracket in Example 5, the battery module mounting bracket in this embodiment further includes a flue gas duct assembly 36. The flue gas duct assembly 36 includes multiple flue gas ducts 361 connected in series via flexible tees 362. Each flexible tee 362 has one port for connection to the explosion relief duct on a battery module 33. The flue gas ducts 361 typically utilize flexible hoses, preferably high-temperature-resistant metal hoses, to meet the requirements for venting thermal runaway flue gas.

[0190] When the flue gas pipe assembly 36 is installed, the temperature control pipe assembly 32 is embedded in one side of the first support beam 311, and the flue gas pipe assembly 36 is embedded in the other side of the first support beam 311. This arrangement can improve space utilization, save space in the energy storage device, and increase the energy density of the energy storage device.

[0191] After the flue gas pipes 361 are connected, the ends of the flue gas pipes 361 pass through the first support beam 311, with the flue gas outlet located on the side of the temperature control pipe assembly 32. Specifically, the union tee 362 is connected to the explosion relief pipe on the battery module 33 via a union nut. In the event of a battery thermal runaway, the thermal runaway flue gas is directed through the flue gas pipe assembly 36 and discharged to subsequent equipment for treatment.

[0192] The above-mentioned flue gas pipe assembly 36 is integrated on the battery module mounting bracket, further improving the integration level of the battery module mounting bracket. At the same time, this spliced ​​flue gas pipe assembly 36 is very convenient for connection and disassembly during installation and maintenance of the battery module 33.

[0193] During the charge and discharge process of a battery module, the battery module itself generates a large amount of heat. If the battery module is not cooled in time, the performance of the battery module will decline. Currently, liquid cooling is mainly used to cool the battery module. When cooling the battery module using liquid cooling, a heat exchange device is installed on each battery module. This heat exchange device can be a liquid cooling plate or liquid cooling tube that contacts the shell of each single battery cell, or contacts the pole of each single battery cell, or contacts the shell. The above-mentioned heat exchange device forms a temperature control system through the liquid inlet branch pipe, the liquid return branch pipe and the temperature control device to control the temperature of the battery module. Among them, the temperature control device is a device with heating and / or cooling functions, specifically a water chiller, a cooling and heating machine, or a refrigerator with a compressor, etc., which is used to increase or decrease the temperature of the heat transfer medium (specifically, water, ethylene glycol / water, propylene glycol / water, methanol / water, ethanol / water, calcium formate / water, etc.) in the liquid inlet branch pipe and the liquid return branch pipe.

[0194] In order to improve energy density, energy storage equipment or power battery packs arrange multiple battery modules in sequence in the horizontal direction, and multiple rows of battery modules in sequence in the vertical direction. In this arrangement, each row of battery modules is equipped with corresponding liquid inlet branch pipes and liquid return branch pipes, and each liquid inlet branch pipe and liquid return branch pipe are connected to the heat exchange device of each battery module. When the battery module is working, the liquid inlet branch pipe diverts the heat transfer medium to the heat exchange device of each battery module, the heat exchange device controls the temperature of the battery module, and the liquid return branch pipe converges the heat transfer medium after heat exchange in the heat exchange device of each battery module. However, the above method has the following defects:

[0195] First, each row of battery modules is equipped with a liquid inlet branch pipe and a liquid return branch pipe, which results in a large number of liquid inlet branch pipes and liquid return branch pipes, making pipe installation more difficult. In addition, the pipes occupy a certain amount of space, which also affects the energy density of the battery module.

[0196] Second, each liquid inlet branch pipe and liquid return branch pipe are connected to the heat exchange device of each battery module, resulting in a large number of pipe joints, prone to leakage, and cumbersome on-site installation.

[0197] Based on this, this embodiment provides a battery cluster, which includes N rows of battery modules and a liquid inlet branch pipeline and a liquid return branch pipeline; each battery module is provided with a heat exchange device; at least one battery module in the first row of battery modules to at least one battery module in the Nth row of battery modules constitute a battery module unit; the heat exchange devices of all battery modules in each battery module unit are connected in series, and after the series connection, each battery module unit has a liquid inlet and a liquid outlet; the liquid inlet of each battery module unit is connected to the liquid inlet branch pipeline, and the liquid outlet is connected to the liquid return branch pipeline.

[0198] In the aforementioned battery cluster, N rows of battery modules share one liquid inlet branch and one liquid return branch, reducing the number of pipelines and lowering their costs. Furthermore, the pipeline layout is relatively simple, saving installation space and increasing the energy density of the battery module. Secondly, the heat exchange devices of all battery modules in each battery module unit are connected in series. After the series connection, each battery module unit has only one liquid inlet and outlet, allowing N rows of battery modules to be connected to the liquid inlet and liquid return branches using fewer pipe joints. The reduction in pipe joints not only reduces leakage of the heat transfer medium but also reduces piping costs.

[0199] This connection method reduces the number of liquid inlet and return branch pipes, simplifying the difficulty of pipe assembly and connection. Furthermore, if this battery cluster is used in an energy storage device, it can save space and increase the energy density of the energy storage device. Furthermore, N rows of battery modules 41 can be connected to the liquid inlet branch pipes 43 and the return branch pipes 44 using only a few pipe joints. The reduction in pipe joints not only reduces leakage of the heat transfer medium but also further reduces piping costs.

[0200] Example 7

[0201] As shown in Figures 16 to 18, this embodiment provides a battery cluster, which includes two rows of battery modules 41 and a temperature control pipeline assembly, the temperature control pipeline assembly including a liquid inlet branch pipeline 43 and a liquid return branch pipeline 44; each battery module 41 is provided with a heat exchange device; at least one battery module 41 in the first row of battery modules 41 and at least one battery module 41 in the second row of battery modules 41 form a battery module unit 400; the heat exchange devices of all battery modules 41 in each battery module unit 400 are connected in series, and after the series connection, each battery module unit 400 has a liquid inlet 401 and a liquid outlet 402; the liquid inlet 401 of each battery module unit 400 is connected to the liquid inlet branch pipeline 43, and the liquid outlet 402 is connected to the liquid return branch pipeline 44.

[0202] This embodiment describes a battery cluster comprising two rows of battery modules 41. In other embodiments, the battery cluster may also include three or four rows of battery modules. In this case, the three rows of battery modules share one liquid inlet branch pipe 43 and one liquid return branch pipe 44. Alternatively, the four rows of battery modules share one liquid inlet branch pipe 43 and one liquid return branch pipe 44. The pipe connection method is the same as that of two rows of battery modules 41 sharing one liquid inlet branch pipe 43 and one liquid return branch pipe 44.

[0203] When the battery cluster includes three rows of battery modules, the three rows of battery modules can form a plurality of battery module units 400, and at least one battery module 41 in the first row of battery modules to at least one battery module 41 in the third row of battery modules constitute a battery module unit. That is, at least one battery module 41 in the first row of battery modules, at least one battery module 41 in the second row of battery modules, and at least one battery module 41 in the third row of battery modules constitute a battery module unit 400, and the heat exchange devices of all battery modules 41 in the battery module unit 400 are connected in series so that the battery module unit 400 has a liquid inlet 401 and a liquid outlet 402; the liquid inlet 401 of the battery module unit 400 is connected to the liquid inlet branch pipe 43, and the liquid outlet 402 is connected to the liquid return branch pipe 44.

[0204] When the battery cluster includes 4 rows of battery modules, at least one battery module 41 in the first row of battery modules to at least one battery module 41 in the fourth row of battery modules constitute a battery module unit, and the 4 rows of battery modules can form multiple battery module units 400. That is, at least one battery module 41 in the first row of battery modules, at least one battery module 41 in the second row of battery modules, at least one battery module 41 in the third row of battery modules, and at least one battery module 41 in the fourth row of battery modules constitute a battery module unit 400. The heat exchange devices of all battery modules 41 in the battery module unit 400 are connected in series so that the battery module unit 400 has a liquid inlet 401 and a liquid outlet 402; the liquid inlet 401 of the battery module unit 400 is connected to the liquid inlet branch pipe 43, and the liquid outlet 402 is connected to the liquid return branch pipe 44.

[0205] The battery module 41 can be a single cell, a pack, or a large-capacity battery. Specifically, large-capacity batteries are those disclosed in Chinese patents CN117477186A, CN117477063A, and CN115275453A. These battery modules include multiple single cells, each of which has an inner cavity connected to at least one shared chamber. The shared chamber of this type of battery module is achieved through at least one hollow component, which can be composed of a hollow box with one end open and a cover for covering the open end. The hollow box is fixed to the upper cover, lower cover, or cylinder of each single cell, and the inner cavity of each single cell is connected to the inner cavity of the hollow component, so that each single cell is in the same electrolyte system and gas balance system.

[0206] As shown in Figures 19 and 20, the battery module 41 in this embodiment includes a housing 411 and multiple single cells 412. The multiple single cells 412 are arranged in the same direction and placed within the housing 411. The housing 411 has a shared chamber, the inner cavity of which is connected to the inner cavities of all single cells 412. The single cells 412 in this embodiment are prismatic batteries, and the number can be adjusted according to actual needs. The inner cavity of each single cell 412 includes an electrolyte region and a gas region.

[0207] As shown in Figure 20, after multiple single cells 412 are arranged in the same direction and placed in the shell 411, avoidance holes are opened on the top plate of the shell 411 corresponding to the polarity terminals 413 of each single cell 412, and the polarity terminals 413 of each single cell 412 extend out of the corresponding avoidance holes as the polarity terminals of the battery module 41 (the polarity terminals of all single cells 412 located on one side serve as the positive polarity terminals of the battery module 41, and the polarity terminals of all single cells 412 located on the other side serve as the negative polarity terminals of the battery module 41). The top plate area of ​​the shell 411 corresponding to the avoidance hole is fixedly sealed with the shell of the single cell 412, so that the gap between the polarity terminal 413 and the avoidance hole is sealed.

[0208] It should be noted that the polarity terminal 413 of the single cell 412 here can be the pole of the single cell 412. To prevent the pole of the single cell 412 from being unable to smoothly extend out of the avoidance hole as the polarity terminal 413, a pole adapter can be connected to the pole of the single cell 412, and the entire structure of the pole of the single cell 412 and the pole adapter can be used as the polarity terminal 413 of the single cell 412.

[0209] The shared chamber in the above-mentioned shell 411 can be an electrolyte shared chamber 4111, which is a liquid channel arranged on the bottom plate of the shell 411. The inner cavity of the electrolyte shared chamber 4111 is connected to the electrolyte area of ​​the inner cavity of all single cells 412. Through the electrolyte shared chamber 4111, each single cell 412 can be placed in a unified electrolyte environment, ensuring the uniformity of the electrolyte in each single cell 412, and improving the performance and charge and discharge cycle life of the battery module 41.

[0210] The shared chamber in the above-mentioned shell 411 can be a gas sharing chamber 4112, which is a gas channel arranged on the top plate of the shell 411. The inner cavity of the gas sharing chamber 4112 is connected to the inner cavity gas area of ​​all single cells 412. The gas balance of each single cell 412 is achieved through the gas sharing chamber 4112, and the performance and charge and discharge cycle life of the battery module 41 can also be improved.

[0211] The shared chamber can be a gas-liquid shared chamber, the inner cavity of which is connected to the electrolyte and gas areas of all the cells 412. This shared chamber allows each cell 412 to maintain a uniform electrolyte and gas environment, thereby improving the performance and charge-discharge cycle life of the battery module 41. Specifically, a protrusion extending along the arrangement of the cells 412 is provided on the sidewall of the housing 411. The gas-liquid shared chamber is formed at the protrusion and is connected to the electrolyte and gas areas of each cell 412.

[0212] The above-mentioned shared chamber may also include an electrolyte shared chamber 4111 and a gas shared chamber 4112. The inner cavity of the electrolyte shared chamber 4111 is connected to the electrolyte area of ​​the inner cavity of all single cells 412, and the inner cavity of the gas shared chamber 4112 is connected to the gas area of ​​the inner cavity of all single cells 412. Multiple single cells 412 are placed inside a shell 411 with an electrolyte shared chamber 4111 and a gas shared chamber 4112, so that the electrolyte and gas of each single cell 412 are shared to ensure the consistency of each single cell 412, so that the electrolyte and gas of all single cells 412 are in the same system, reducing the differences between each single cell 412, and to a certain extent improving the consistency between each single cell 412, thereby to a certain extent improving the cycle life of the battery module 41.

[0213] The above-mentioned shared chamber may also include an electrolyte shared chamber 4111 and a gas shared chamber 4112. The inner cavity of the electrolyte shared chamber 4111 is connected to the electrolyte area of ​​the inner cavities of all the single cells 412. The gas shared chamber 4112 is a gas channel located between the top plate of the shell 411 and each single cell 412. The gas channel covers the explosion venting part (specifically, it can be an explosion venting membrane) of each single cell 412. When the explosion venting part of any single cell 412 is broken by the internal thermal runaway smoke, the gas area and gas channel of the inner cavity of the single cell 412 are connected. At this time, the gas sharing chamber 4112 is used as an explosion relief channel, that is, during the normal operation of the battery module 41, the inner cavity of each single battery 412 is not connected to the gas channel. When any single battery 412 suffers thermal runaway, the explosion relief part on the top of the single battery 412 is opened by the internal cavity smoke, and the inner cavity of the single battery 412 is connected to the gas channel, and the thermal runaway smoke is discharged through the gas channel, thereby improving the safety of the battery module 41.

[0214] As shown in Figures 18 and 19, the housing 411 is provided with an explosion relief assembly 414 that communicates with the shared chamber. This assembly 414 is connected to a flue gas manifold 46, which includes multiple flue gas pipes 461 and flexible tees 462. The multiple flue gas pipes 461 are connected in series via the flexible tees 462, with one port on each flexible tee 462 being used to connect to the explosion relief assembly 414 on a battery module 41. The flue gas pipes 461 typically utilize flexible hoses, specifically high-temperature-resistant metal hoses, to meet the requirements for exhausting thermal runaway flue gases. After the explosion relief assembly 414 is connected to the flue gas manifold 46, the thermal runaway flue gases of all battery modules 41 are converged through the flue gas manifold 46. When a single battery 412 in any battery module 41 experiences thermal runaway, its thermal runaway flue gases can be discharged through the flue gas manifold 46, reducing the spread of thermal runaway and preventing the thermal runaway flue gases of individual battery modules 41 from spreading to the entire battery cluster and causing safety problems.

[0215] The battery module is provided with a heat exchange device, which may be a liquid cooling plate provided on the bottom or side wall of the housing, or a heat transfer tube provided on the bottom or side wall of the housing.

[0216] As shown in Figures 19 and 20, the heat exchange device in this embodiment comprises a heat transfer tube 42 mounted on the polarity terminal 413 of each battery cell 412. A clamping portion 4131 is provided at the location where the polarity terminal 413 of each battery cell 412 extends out of the avoidance hole. The heat transfer tube 42 is secured to the clamping portion 4131 of each battery cell 412 and is insulated from each battery cell 412. The heat transfer tube 42 is mounted on the polarity terminals of the battery module 41 and primarily controls the temperature at the top of the battery module 41, particularly at the polarity terminals, ensuring that the battery module 41 operates within an optimal temperature range. When the temperature of the battery module 41 exceeds a set threshold, a cooler heat transfer medium is introduced into the heat transfer tube 42 to promptly dissipate heat away from the polarity terminals 413, where heat is most concentrated. This improves heat dissipation at the top of the battery module 41. In addition, when the temperature of the battery module 41 is lower than the set threshold, the battery module 41 is heated by introducing a higher temperature heat transfer medium into the heat transfer tube 42; by controlling the temperature of the heat transfer medium, it can be ensured that the battery module 41 always operates at a normal operating temperature.

[0217] As shown in Figure 19 , the heat transfer tube 42 is a pipe that performs heat exchange. The cross-sectional shape of the heat transfer tube 42 is not critical, as long as it can contact the polarity terminals 413 of the single battery 412 for heat exchange. For example, square tubes, oval tubes, and round tubes can be used. In this embodiment, the heat transfer tube 42 is preferably a round tube, as it is easy to install and can be made from existing metal pipes, resulting in relatively low cost.

[0218] The heat transfer tube 42 in this embodiment is specifically made of a metal tube with good thermal conductivity, such as an aluminum tube or copper tube. Preferably, the heat transfer tube 42 is made of an aluminum tube, which has good thermal conductivity and is relatively low in cost. To ensure effective thermal conductivity, the thinner the aluminum tube, the better. However, if the aluminum tube is too thin, it is relatively flexible and easily bends and breaks during installation. Therefore, in this embodiment, the aluminum tube wall thickness is required to ensure good thermal conductivity while maintaining reliable installation.

[0219] The heat transfer tube 42 can be manufactured in the following manner:

[0220] First, the heat transfer tube 42 can be made of a whole tube. The whole aluminum tube is bent into a U-shaped tube. The two straight tubes of the U-shaped tube are respectively fixed to the positive and negative terminals of each single battery 412 in the battery module 41;

[0221] Second, as shown in FIG19 , the heat transfer tube 42 is a spliced ​​tube, mainly including a first tube 421, a second tube 422 and a connecting tube 423; the first tube 421 is fixed to the clamping portion 4131 of the positive terminal of each single cell 412 in the battery module 41; the second tube 422 is fixed to the clamping portion 4131 of the negative terminal of each single cell 412 in the battery module 41, and both ends of the connecting tube 423 are respectively connected to the ports on the same side of the first tube 421 and the second tube 422.

[0222] To facilitate installation, the heat transfer tube 42 is preferably a second type of spliced ​​tube. At the same time, the connecting tube 423 of the spliced ​​heat transfer tube can also be made of a hose. After the first tube 421 and the second tube 422 are connected by the hose, the first tube 421 and the second tube 422 can be easily installed on the polarity terminals of the battery module 41, thereby improving the installability of the heat transfer tube 42 on the battery module 41. At the same time, the hose is an insulating hose, which improves the insulation between the battery module 41 and the heat transfer tube 42. During the specific connection, the insulating hose is fixedly connected to the first tube 421 and the second tube 422 using a clamp.

[0223] When the heat transfer tube 42 is mated with the polarity terminals of the battery module 41, the heat transfer tube 42 and the battery module 41 need to be insulated to ensure safety. Specifically, the polarity terminals can be insulated, insulating heat conductors can be provided between the polarity terminals and the heat transfer tube 42, and the heat transfer tube 42 can be insulated.

[0224] In this embodiment, insulation treatment of the heat transfer tube 42 is preferred. This insulation treatment can be achieved in the following manner: The heat transfer tube 42 is constructed of an insulating material, such as a plastic or ceramic tube. However, metal tubes typically have poor thermal conductivity. Therefore, considering the heat exchange effect, an insulating layer or sleeve is provided on the metal tube to ensure insulation between the metal tube and the battery module 41 during use. Specifically, the insulating layer can be a ceramic coating, enamel coating, insulating varnish, or hard anodized layer applied to the wall of the heat transfer tube 42. The insulating sleeve can be a thermally conductive plastic sleeve or thermally conductive rubber sleeve, for example, with excellent insulation and thermal conductivity.

[0225] Preferably, an insulating layer and an insulating sleeve are provided on the heat transfer tube 42 to form a double insulation structure. This double insulation setting enables the heat transfer tube 42 to maintain reliable insulation performance between the battery module 41 even if one of the insulating layer or the insulating sleeve is damaged during heat exchange with the battery module 41, thereby improving the safety of the battery module 41 during use.

[0226] As shown in Figure 20, during installation of the heat transfer tube 42, a through slot or through hole is provided at the location where the polarity terminal 413 of the single battery 412 extends out of the avoidance hole, serving as a clamping portion 4131. Compared to a through hole, a through slot is more convenient for on-site installation and has relatively low installation requirements. The through slot is C-shaped in cross-section, and the opening width of the C-shaped through slot is smaller than the widest point of the slot. This design facilitates interference fit of the heat transfer tube 42 within the slot. The arc formed at both ends of the C-shaped through slot provides natural tension, which helps to tightly clamp the heat transfer tube 42 within the slot.

[0227] As shown in Figures 16, 17 and 18, the battery modules 41 equipped with the heat transfer tubes 42 form a battery cluster, which includes two rows of battery modules 41. The number of battery modules 41 in each row is multiple, wherein at least one battery module 41 in the first row of battery modules 41 and at least one battery module 41 in the second row of battery modules 41 form a battery module unit 400. All the battery modules 41 in the entire battery cluster can form multiple battery module units 400. The number of battery module units 400 and the number of battery modules in each battery module unit 400 can be set accordingly according to needs. For example, if each row includes 26 battery modules and the entire battery cluster includes 52 battery modules, then as shown in Figures 16 and 17, four battery modules 41 form one battery module unit 400, and 52 battery modules form 13 battery module units 400; or as shown in Figure 18, 52 battery modules form a total of 8 battery module units 400, of which four battery module units 400 each include 7 battery modules, and the remaining four battery module units 400 each include 6 battery modules; Figure 18 only shows the structure of 7 battery modules forming one battery module unit 400.

[0228] As shown in Figure 18, in each battery module unit 400, the heat transfer tube 42 of each battery module 41 has a liquid inlet port and a liquid outlet port. The heat transfer tube 42 of each battery module 41 is connected in series through the intermediate pipeline 49. After the series connection is completed, the liquid inlet port of one battery module 41 and the liquid outlet port of another battery module 41 are vacant ports. At this time, these two vacant ports are used as the liquid inlet 401 and liquid outlet 402 of the battery module unit 400; the liquid inlet 401 of the battery module unit 400 is connected to the liquid inlet branch pipeline 43, and the liquid outlet 402 is connected to the liquid return branch pipeline 44.

[0229] After the liquid inlet 401 of the battery module unit 400 is connected to the liquid inlet branch pipe 43 and the liquid outlet 402 is connected to the liquid return branch pipe 44, the liquid inlet branch pipe 43 diverts the heat transfer medium to each battery module unit 400. In each battery module unit 400, the heat transfer medium passes through the heat transfer tube 42 on each battery module 41 in turn. The heat transfer tube 42 exchanges heat with the polarity terminal of each battery module 41. After the heat transfer medium exchanges heat, the heat transfer medium returns to the liquid return branch pipe 44 through the liquid outlet 402. The liquid return branch pipe 44 is used to converge the heat transfer medium after heat exchange with each battery module unit 400.

[0230] After the battery module units 400 are connected to the liquid inlet branch pipe 43 and the liquid return branch pipe 44, the liquid inlet branch pipe 43 diverts the heat transfer medium to each battery module unit 400. The heat transfer medium diverted to each battery module unit 400 sequentially exchanges heat with the heat transfer pipe 42 in the battery module unit 400. At this time, if the number of battery modules 41 in each battery module unit 400 is different, the amount of heat exchange between each battery module unit 400 and the heat transfer medium will be different, resulting in a temperature difference between the battery module units 400. Therefore, preferably, the number of battery modules 41 in each battery module unit 400 is the same. More preferably, in each battery module unit 400, the number of battery modules 41 in the first row and the number of battery modules 41 in the second row are the same. This arrangement ensures that the heat exchange between each battery module unit 400 and the heat transfer medium is as consistent as possible, and the temperature difference between each battery module unit 400 is as small as possible, thereby achieving more uniform heat exchange for each battery module unit 400, balancing the temperature difference between each battery module unit 400, and improving the safety of the battery cluster.

[0231] The liquid inlet branch pipe 43 and the liquid return branch pipe 44 in this embodiment can specifically adopt the following structures:

[0232] First, the liquid inlet branch line 43 and the liquid return branch line 44 are both made of a single pipe, on which are provided a plurality of branch lines 410 connected to the liquid inlet 401 and the liquid outlet 402 of each battery module unit 400;

[0233] Second, as shown in Figures 16, 17 and 18, the liquid inlet branch pipeline 43 is mainly composed of a plurality of liquid inlet pipe sections 431, and the liquid return branch pipeline 44 is mainly composed of a plurality of liquid return pipe sections 441. The number of liquid inlet pipe sections 431 and liquid return pipe sections 441 is the same as the number of battery module units 400. A branch pipeline 410 is provided on each liquid inlet pipe section 431 and each liquid return pipe section 441. The liquid inlet 401 of each battery module unit 400 is connected to the branch pipeline 410 on each liquid inlet pipe section 431 in a one-to-one correspondence, and the liquid outlet 402 of each battery module unit 400 is connected to the branch pipeline 410 on each liquid return pipe section 441 in a one-to-one correspondence.

[0234] In the above two structures, when a whole pipe is used to make the liquid inlet branch pipe 43 and the liquid return branch pipe 44, the installation of each pipe is more difficult, and the installation position of each pipe needs to be accurately guaranteed to avoid installation errors. At the same time, during on-site maintenance, the liquid inlet branch pipe 43 and the liquid return branch pipe 44 need to be completely disassembled before the relevant battery module 41 and the liquid inlet branch pipe 43 and the liquid return branch pipe 44 can be repaired, which makes maintenance time troublesome and laborious, and installation and maintenance are very inconvenient. Therefore, the preferred solution is that both the liquid inlet branch pipe 43 and the liquid return branch pipe 44 are spliced ​​pipes, and each battery module unit 400 is assembled with the corresponding liquid inlet pipe section 431 and liquid return pipe section 441. This type of spliced ​​pipe reduces the error and assembly difficulty when connecting the liquid inlet branch pipe 43 and the liquid return branch pipe 44. At the same time, during subsequent maintenance of this type of spliced ​​pipeline, it is only necessary to remove the liquid inlet pipe section 431 and the liquid return pipe section 441 of the relevant battery module unit 400 for maintenance, without removing the entire liquid inlet branch pipe 43 and the liquid return branch pipe 44, which greatly improves the convenience of installation, disassembly and maintenance.

[0235] As shown in Figures 17 and 18, during the specific connection, the liquid inlet 401 of each battery module unit 400 is connected to the branch pipe 410 of each liquid inlet pipe section 431 through a quick-connect connector 45, and the liquid outlet 402 of each battery module unit 400 is connected to the branch pipe 410 of each liquid return pipe section 441 through a quick-connect connector 45. The quick-connect connector 45 is easy to install and can be directly plugged in and out without tools. When adjusting and maintaining the liquid inlet branch pipe 43 and the liquid return branch pipe 44 on site, the purpose of rapid installation and removal is achieved, while also reducing maintenance costs and improving the convenience of installation or removal. In addition, the above-mentioned quick-connect connector 45 can also have a two-way self-sealing function. During the process of plugging and unplugging the quick-connect connector 45, the flow of liquid can be automatically cut off. When repairing the battery module 41 and the liquid inlet branch pipe 43 and the liquid return branch pipe 44, there is no need to empty the heat transfer medium in each pipe, thereby improving the convenience of maintenance.

[0236] In addition, in this embodiment, the liquid inlet branch pipe 43 and the liquid return branch pipe 44 may be covered with an insulation layer. The insulation layer can effectively prevent the loss of cold or heat of the heat transfer medium, reduce energy consumption, and avoid condensation on the pipe walls of each pipe.

[0237] Example 8

[0238] The battery cluster in this embodiment has a similar structure to that in Example 7. However, the difference from Example 7 is that the battery module 41 in this embodiment is slightly different from the battery module 41 in Example 7.

[0239] During long-term use of the battery module 41, condensation will be generated on the surface due to the temperature difference between the inside and outside of the heat transfer tube 42. When the condensation accumulates to a certain amount, it will penetrate into the gap between the polarity terminal 413 of the single battery 412 and the avoidance hole, causing the polarity terminal 413 of the single battery 412 to be electrically conductive with the outer shell 411, which may cause a short circuit in the same single battery 412.

[0240] As shown in Figures 21 and 22, this embodiment overcomes the aforementioned issues by optimizing the top structure of the battery module 41 and applying an insulating sealant layer 415 to the top plate of the outer shell 411. The end faces of the polarity terminals 413 of each battery cell 412 extend beyond the insulating sealant layer 415 for connection to a first or second electrical connector. The inlet and outlet ports of the heat transfer tube 42 also extend beyond the insulating sealant layer 415. The first electrical connector connects the battery cells 412 in parallel, while the second electrical connector connects two battery modules 41 in series, and can also connect the battery module 411 to an external load.

[0241] In this embodiment, an insulating sealant layer 415 is laid on the top plate of the housing 411. Partial areas of the polarity terminals 413 of each single battery 412 are covered by the insulating sealant layer 415. The end faces of the polarity terminals 413 of each single battery 412 extend out of the insulating sealant layer 415 and are connected to the first electrical connector and / or the second electrical connector. The main parts of the heat transfer tubes 42 are all covered by the insulating sealant layer 415. The liquid inlet and liquid outlet ends of the heat transfer tubes 42 extend out of the insulating sealant layer 415 for connection to the liquid inlet and liquid return manifolds.

[0242] In other embodiments, the thickness of the insulating sealant layer 415 may be smaller, lower than the main portion of the heat transfer tube 42, or covering a portion of the main portion of the heat transfer tube 42, as long as condensation cannot enter the gap between the polarity terminals 413 of the single battery 412 and the avoidance hole. The insulating sealant used in this embodiment is generally a commonly used battery potting compound, such as a silicone thermally conductive potting compound, which provides excellent sealing, insulation, vibration resistance, heat dissipation, and waterproofing properties.

[0243] On the basis of the above structure, this embodiment further provides an insulating protective cover 416 on the top of the battery module 41 to provide insulation protection for the polarity terminal 413, thereby avoiding the potential safety hazards caused by the polarity terminal 413 being exposed during the operation of the battery module 41, and also avoiding the problem of some foreign objects in the external environment falling into the position of the polarity terminal 413 and causing a short circuit in the battery module 41, thereby improving the safety of the battery module 41.

[0244] It should be noted that if the insulating protective cover 416 completely encloses the polarity terminals 413, electrical connection of this type of battery module 41 would be difficult. Therefore, in this embodiment, a slit is provided in the side wall of the insulating protective cover 416. Through this slit, the second electrical connector can be connected to the polarity terminals 413 of the single battery 412, thereby achieving electrical connection. It should also be noted that the side wall of the insulating protective cover 416 also needs to provide a channel for the liquid inlet and outlet ports of the heat transfer tube 42 to extend.

[0245] Example 9

[0246] As shown in Figures 23 to 26, the battery cluster in this embodiment has a similar structure to that of the battery clusters in Examples 7 and 8. The difference is that the battery cluster in this embodiment further includes a support frame 48, on which the battery modules 41 of the multiple battery module units 400 are placed. The support frame 48 includes a first support frame 481 and a second support frame 482. The first row of battery modules 41 is mounted on the first support frame 481, and the second row of battery modules 41 is mounted on the second support frame 482. The first support frame 481 and the second support frame 482 have the same structure, primarily consisting of two first support beams 4811 and two second support beams 4812. Furthermore, the first support frame 481 and the second support frame 482 are assembled into a single frame by vertical connecting beams 483, and the bottom of the second support frame 482 has at least one sliding roller 484. In this embodiment, multiple battery module units 400 are placed on a support frame 48. This integrated frame has high stability and can support two rows of battery modules 41 more stably.

[0247] As shown in Figure 26, in order to make the support frame 48 with the battery cluster installed able to be easily installed in place or removed for maintenance, the support frame 48 is generally installed in a sliding manner with the battery rack in the energy storage device. At this time, at least one sliding roller 484 is installed at the bottom of the second support frame 482, and the battery module unit 400 can be easily installed in place by the sliding roller 484. In the specific setting, the sliding roller 484 can be set on the second support beam 4812. The second support beam 4812 can be made of a square steel pipe, and a plurality of through slots are provided at the bottom of the square steel pipe. The sliding roller 484 is installed in the square steel pipe, and its bottom extends out of the through slot on the square steel pipe, so that it can slide on the battery rack in the energy storage device. After installation, the support frame 48 can be fixed to the battery rack using a limiter.

[0248] As shown in Figures 27 and 28, when placing the battery modules 41 on the support frame 48, a bracket is added to the bottom of each battery module. Each battery module 41 is secured to the support frame 48 via its own bracket 47. As shown in Figure 29, bracket 47 includes a support member 471 and two L-shaped brackets 472. The support member 471 is placed at the bottom of the battery module 41 to support the battery module 41. One end of the two L-shaped brackets 472 is fixed to the two ends of the support member 471, and the other ends of the two L-shaped brackets 472 are respectively used to secure to the second support beam 4812 of the support frame 48. The support member 471 is a support plate that adapts to the shape of the bottom of the battery module 41 and supports the battery module 41. To reduce the weight of the support plate, weight-reducing holes can be opened in the support plate. However, it should be noted that the opening of the weight-reducing holes must not affect the support strength.

[0249] To improve the stability of the battery module 41 on the bracket 47, this embodiment further provides threaded holes in the L-shaped bracket 472, which are screwed to securely connect the L-shaped bracket 472 to the battery module 41. During assembly, the battery module 41 is placed on the support member 471. To insulate the bracket 47 from the battery module 41, an insulating gasket may be provided between the support member 471 and the battery module 41. The bracket 47 and the battery module 41 housing 411 are then secured with screws.

[0250] In addition, after placing multiple battery module units 400 on the support frame 48, the liquid inlet branch pipe 43 can be embedded and installed in the first support frame 481, and the liquid return branch pipe 44 can be embedded and installed in the second support frame 482. This installation method can isolate the battery module 41 from the liquid inlet branch pipe 43 and the liquid return branch pipe 44, avoiding the impact of leakage at the pipe joints on the battery module 41. At the same time, the embedded installation also improves the integration level of the entire battery cluster.

[0251] Example 10

[0252] As shown in Figures 30 and 31, the battery cluster in this embodiment has a similar structure to the battery clusters in Examples 7 and 8. The difference is that the battery cluster in this embodiment further includes multiple support frames 48, and the number of support frames 48 is the same as the number of battery module units 400. The battery modules 41 of each battery module unit 400 are placed on a support frame 48, and the structure of the support frame 48 is the same as that of the support frame in Example 9, except that the length of the support frame 48 is different.

[0253] In this embodiment, there are multiple support frames 48, and each battery module unit 400 is placed on a corresponding support frame 48. This installation method makes the entire battery cluster have a wider range of uses, and the battery modules in the battery cluster can be assembled in a smaller installation space. At the same time, this installation method only needs to remove some battery module units 400 from the battery rack for maintenance during later maintenance, without removing all battery module units 400, so maintenance is relatively convenient.

[0254] It should be noted that the battery module units are set on their respective support frames 48. At this time, the liquid inlet branch pipe 43 and the liquid return branch pipe 44 in each battery module unit 400 both adopt spliced ​​pipes. After each battery module unit 400 is installed on the battery rack of the energy storage box through its own support frame 48, the liquid inlet pipe section 431 and the liquid return pipe section 441 of the adjacent battery module units 400 are then connected to splice to form the liquid inlet branch pipe 43 and the liquid return branch pipe 44. At the same time, the flue gas pipes 461 of the adjacent battery module units 400 are also connected to form a flue gas manifold 46.

[0255] In addition, after the plurality of battery module units 400 are placed on the battery rack via their respective support frames 48 , the battery modules in adjacent battery module units 400 are electrically connected accordingly.

[0256] Example 11

[0257] This embodiment provides an energy storage device, which includes an energy storage box and multiple battery clusters according to Example 7, Example 8, Example 9 or Example 10 arranged in the energy storage box; a battery rack is provided in the energy storage box, and multiple battery clusters are stacked on the battery rack in the height direction of the battery module 41.

Claims

1. A temperature-controlled pipeline assembly, characterized in that, It includes an inlet main pipeline, a return main pipeline, an inlet branch pipeline, a return branch pipeline, a first-stage return pipe and a first-stage inlet pipe; the inlet main pipeline is mainly formed by splicing a plurality of third-stage inlet pipes through a first connecting pipe, and one port of the first connecting pipe is used to connect to the inlet of an inlet branch pipeline; the return main pipeline is mainly formed by splicing a plurality of third-stage return pipes through a second connecting pipe, and one port of the second connecting pipe is used to connect to the outlet of a return branch pipeline; the inlet branch pipeline is mainly formed by splicing a plurality of second-stage inlet pipes through a third connecting pipe, and one port of the third connecting pipe is used to connect to the inlet of the first-stage inlet pipe; the return branch pipeline is mainly formed by splicing a plurality of second-stage return pipes through a fourth connecting pipe, and one port of the fourth connecting pipe is used to connect to the outlet of the first-stage return pipe; the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all three-way joints; the outlet of the first-stage inlet pipe is used to connect to the heat exchange inlet of the battery module, and the inlet of the first-stage return pipe is used to connect to the heat exchange outlet of the battery module.

2. The temperature control pipeline assembly according to claim 1, wherein The inlet main pipeline and the return main pipeline are respectively arranged on both sides of the battery cluster, and the inlet main pipeline, the return main pipeline, the inlet branch pipeline and the return branch pipeline are in the same plane.

3. The temperature control pipeline assembly according to claim 1, wherein The flow-through areas of the first-stage inlet pipe, the second-stage inlet pipe and the third-stage inlet pipe gradually increase, and the flow-through areas of the first-stage return pipe, the second-stage return pipe and the third-stage return pipe gradually increase.

4. The temperature control pipeline assembly according to claim 1, characterized in that The third-stage inlet pipe, the third-stage return pipe, the second-stage inlet pipe and the second-stage return pipe are covered with heat-insulating sleeves.

5. The temperature control pipeline assembly according to any one of claims 1 to 4, characterized in that, The first-stage inlet pipe and the first-stage return pipe are flexible pipelines, and the third-stage inlet pipe and the third-stage return pipe are flexible pipelines.

6. The temperature control pipeline assembly according to claim 5, wherein, Quick-connect joints are arranged at the inlets of the inlet branch pipeline and the outlets of the return branch pipeline, and exhaust valves are arranged at the tops of the inlet main pipeline and the return main pipeline.

7. A temperature-controlled pipeline assembly, characterized in that, It includes an inlet pipeline unit and a return pipeline unit; the inlet pipeline unit includes a sixth-stage inlet main pipeline, a fifth-stage inlet main pipeline, a fourth-stage inlet main pipeline, a third-stage inlet main pipeline, a second-stage inlet branch pipeline and a first-stage inlet pipe; the inlet of the sixth-stage inlet main pipeline is used to connect to a temperature control device; the fifth-stage inlet main pipeline is used to divert the heat transfer medium in the sixth-stage inlet main pipeline to a plurality of battery compartments; the fourth-stage inlet main pipeline is used to divert the heat transfer medium in the fifth-stage inlet main pipeline to a plurality of battery clusters; the third-stage inlet main pipeline is used to divert the heat transfer medium in the fourth-stage inlet main pipeline to a plurality of battery module units; The second-stage inlet branch pipeline is used to divert the heat transfer medium in the third-stage inlet main pipeline to a plurality of battery modules; the first-stage inlet pipe is used to connect to the heat exchange inlet of the battery module. The liquid return pipeline unit includes a sixth-level main liquid return pipeline, a fifth-level main liquid return pipeline, a fourth-level main liquid return pipeline, a third-level main liquid return pipeline, a second-level liquid return branch pipeline, and a first-level liquid return pipe; the first-level liquid return pipe is used to connect to the heat exchange outlet of the battery module, and the second-level liquid return branch pipeline is used to collect the heat transfer medium in multiple first-level liquid return pipes into the third-level main liquid return pipeline; the third-level main liquid return pipeline is used to collect the heat transfer medium in multiple second-level liquid return branch pipelines into the fourth-level main liquid return pipeline; the fourth-level main liquid return pipeline is used to collect the heat transfer medium in multiple third-level main liquid return pipelines into the fifth-level main liquid return pipeline; the fifth-level main liquid return pipeline is used to collect the heat transfer medium in multiple fourth-level main liquid return pipelines into the sixth-level main liquid return pipeline, and the outlet of the sixth-level main liquid return pipeline is used to connect to the temperature control device.

8. The temperature control pipeline assembly according to claim 7, wherein The lengths of multiple fifth-level main liquid return pipelines are the same, the lengths of multiple fourth-level main liquid return pipelines are the same, and the lengths of multiple third-level main liquid return pipelines are the same.

9. The temperature control pipeline assembly according to claim 7, characterized in that, The flow-through areas of the sixth-level main liquid inlet pipeline, the fifth-level main liquid inlet pipeline, the fourth-level main liquid inlet pipeline, the third-level main liquid inlet pipeline, the second-level liquid inlet branch pipeline, and the first-level liquid inlet pipe gradually decrease, and the flow-through areas of the sixth-level main liquid return pipeline, the fifth-level main liquid return pipeline, the fourth-level main liquid return pipeline, the third-level main liquid return pipeline, the second-level liquid return branch pipeline, and the first-level liquid return pipe gradually decrease.

10. The temperature control pipeline assembly according to claim 7, characterized in that, The second-level liquid inlet branch pipeline is mainly formed by alternately splicing multiple liquid inlet sub-pipeline segments and multiple first connection pipes, and one port of each first connection pipe is used to connect to the inlet of a first-level liquid inlet pipe; the second-level liquid return branch pipeline is mainly formed by alternately splicing multiple liquid return sub-pipeline segments and multiple second connection pipes, and one port of the second connection pipe is used to connect to the outlet of a first-level liquid return pipe; both the first connection pipe and the second connection pipe are three-way joints.

11. The temperature control pipeline assembly according to claim 10, wherein, The third-level main liquid inlet pipeline is mainly formed by alternately splicing multiple liquid inlet branch pipeline segments and multiple third connection pipes, and one port of the third connection pipe is used to connect to the liquid inlet of a second-level liquid inlet branch pipeline; the third-level main liquid return pipeline is mainly formed by alternately splicing multiple liquid return branch pipeline segments and multiple fourth connection pipes, and one port of the fourth connection pipe is used to connect to the liquid outlet of a second-level liquid return branch pipeline; both the third connection pipe and the fourth connection pipe are three-way joints.

12. The temperature control pipeline assembly according to any one of claims 7 to 11, characterized in that, The sixth-level main liquid inlet pipeline, the fifth-level main liquid inlet pipeline, the fourth-level main liquid inlet pipeline, the sixth-level main liquid return pipeline, the fifth-level main liquid return pipeline, and the fourth-level main liquid return pipeline are all located at the top of each battery cluster, and the third-level main liquid inlet pipeline and the third-level main liquid return pipeline are respectively arranged on both sides of each battery cluster.

13. The temperature control pipeline assembly according to claim 12, wherein The first-level liquid inlet pipe and the first-level liquid return pipe are flexible pipelines.

14. The temperature control pipeline assembly according to claim 13, wherein, Quick connectors are provided at the liquid inlet of the second-level liquid inlet branch pipeline and the liquid outlet of the second-level liquid return branch pipeline, and exhaust valves are provided at the tops of the third-level main liquid inlet pipeline and the third-level main liquid return pipeline.

15. A battery module mounting bracket, characterized in that, It includes a bracket main body and a temperature control pipeline assembly; the bracket main body is used for insulating and supporting at least one battery module; the temperature control pipeline assembly includes a primary liquid inlet pipe, a primary liquid return pipe, a secondary liquid inlet pipe, and a secondary liquid return pipe; a plurality of secondary liquid inlet pipes are connected through a first three-way joint to form a liquid inlet branch pipeline, and a plurality of secondary liquid return pipes are connected through a second three-way joint to form a liquid return branch pipeline. The liquid inlet branch pipeline and the liquid return branch pipeline are both embedded and installed in the bracket main body; one end of the primary liquid inlet pipe is used for connecting to the heat exchange inlet of the battery module, and the other end is connected to the secondary liquid inlet pipe through the first three-way joint; one end of the primary liquid return pipe is used for connecting to the heat exchange outlet of the battery module, and the other end is connected to the secondary liquid return pipe through the second three-way joint.

16. The battery module mounting bracket according to claim 15, characterized in that, The bracket main body is mainly composed of a frame structure formed by two first support beams and two second support beams; at least one first support beam is made of I-shaped steel, and the liquid inlet branch pipeline and the liquid return branch pipeline are embedded in the I-shaped steel.

17. The battery module mounting bracket according to claim 16, characterized in that, A pressing plate is provided on the I-shaped steel, and the pressing plate fixes the liquid inlet branch pipeline and the liquid return branch pipeline on the I-shaped steel.

18. The battery module mounting bracket according to claim 16, wherein, It also includes a U-shaped guard plate arranged on one side of the I-shaped steel. The liquid inlet branch pipeline and the liquid return branch pipeline are arranged in the protection space formed by the U-shaped guard plate and the I-shaped steel. At the same time, the U-shaped guard plate has avoidance notches through which the primary liquid inlet pipe and the primary liquid return pipe pass.

19. The battery module mounting bracket according to claim 15, wherein, The secondary liquid inlet pipe and the secondary liquid return pipe are coated with heat insulation sleeves.

20. The battery module mounting bracket according to claim 15, wherein, The liquid inlet of the liquid inlet branch pipeline and the liquid outlet of the liquid return branch pipeline both extend to the outside of the bracket main body.

21. The battery module mounting bracket according to claim 15, characterized in that, The primary liquid inlet pipe and the primary liquid return pipe are flexible pipelines.

22. The battery module mounting bracket according to any one of claims 16 to 21, characterized in that, It also includes a smoke pipeline assembly. The smoke pipeline assembly includes a plurality of smoke pipelines, and the plurality of smoke pipelines are connected in series through a union three-way joint. And in each union three-way joint, one port is used for connecting to a venting pipeline on one battery module.

23. The battery module mounting bracket according to claim 22, wherein, The liquid inlet branch pipeline and the liquid return branch pipeline are embedded and installed on one side of the first support beam, and the smoke pipeline assembly is embedded and installed on the other side of the first support beam.

24. The battery module mounting bracket according to claim 16, wherein, The second support beam is a square steel pipe. A plurality of through slots are opened at the bottom of the square steel pipe. The rollers are installed inside the square steel pipe, and the bottom of the rollers extends out of the through slots of the square steel pipe.

25. A battery cluster, characterized in that, It includes N rows of battery modules and a temperature control pipeline assembly. The temperature control pipeline assembly includes a liquid inlet branch pipeline and a liquid return branch pipeline, where N is an integer greater than or equal to 2; each battery module is provided with a heat exchange device; at least one battery module in the first row of battery modules to at least one battery module in the Nth row of battery modules form a battery module unit; the heat exchange devices of all battery modules in each battery module unit are connected in series. After being connected in series, each battery module unit has a liquid inlet and a liquid outlet; the liquid inlets of each battery module unit are all connected to the liquid inlet branch pipeline, and the liquid outlets are all connected to the liquid return branch pipeline.

26. The battery cluster according to claim 25, characterized in that, The number of battery modules in each battery module unit is the same, and in each battery module unit, the number of battery modules in each row is the same.

27. The battery cluster according to claim 25, wherein The liquid inlet branch pipeline is mainly composed of a plurality of liquid inlet pipe segments spliced together, and the liquid return branch pipeline is mainly composed of a plurality of liquid return pipe segments spliced together. The number of liquid inlet pipe segments and liquid return pipe segments is the same as the number of battery module units. The liquid inlet of each battery module unit is respectively connected to the branch pipeline of each liquid inlet pipe segment through a quick connector in one-to-one correspondence, and the liquid outlet of each battery module unit is respectively connected to the branch pipeline of each liquid return pipe segment through a quick connector in one-to-one correspondence.

28. The battery cluster according to claim 25, wherein , further comprising a support frame, and the battery modules of a plurality of battery module units are all placed on a support frame. The support frame includes N support frames arranged in sequence from top to bottom. A bracket is provided at the bottom of each battery module. Each row of battery modules is arranged on a support frame through the bracket, and adjacent support frames are connected into a frame body through a vertical connecting beam. At least one sliding roller is provided at the bottom of the Nth support frame.

29. The battery cluster according to claim 25, characterized in that, Further comprising a plurality of support frames, the number of support frames is the same as the number of battery module units. The battery module of one battery module unit is placed on one support frame. The support frame includes N support frames arranged in sequence from top to bottom. In each battery module unit, a bracket is provided at the bottom of each battery module. Each row of battery modules is arranged on a support frame through the bracket, and adjacent support frames are connected into a frame body through a vertical connecting beam. At least one sliding roller is provided at the bottom of the Nth support frame.

30. The battery cluster according to claim 28 or 29, characterized in that, The liquid inlet branch pipeline and the liquid return branch pipeline are both embedded and installed in the support frame.

31. The battery cluster according to any one of claims 25 to 29, characterized in that, The battery module includes a housing and a plurality of single batteries arranged in the same direction in the housing. A shared chamber is provided in the housing, and the inner cavity of the shared chamber is communicated with the inner cavities of all single batteries. Avoidance holes are provided on the top plate of the housing corresponding to the polarity terminals of each single battery. The polarity terminals of each single battery extend out of the avoidance holes, and the area of the top plate of the housing corresponding to the avoidance holes is fixedly sealed with the single battery housing.

32. The battery cluster according to claim 31, wherein The heat exchange device includes a heat transfer pipe. A clamping portion is provided at the part where the polarity terminal of each single battery extends out of the avoidance hole. The heat transfer pipe is fixed on the clamping portion of the polarity terminal of each single battery, and the heat transfer pipe is insulated from each single battery.

33. The battery cluster according to claim 32, wherein, An insulating and sealing glue layer is laid on the top plate of the housing, and the liquid inlet port and the liquid outlet port of the heat transfer pipe extend out of the insulating and sealing glue layer. At the same time, an insulating protective cover is provided on the top of the housing, and the polarity terminals of each single battery are located in the insulating protective cover.

34. The battery cluster according to claim 31, wherein Further comprising a flue gas converging pipe, the flue gas converging pipe includes a plurality of flue gas pipelines and a union tee. The plurality of flue gas pipelines are connected in series through the union tee, and one port of each union tee is used to be connected to an explosion venting component on one battery module. The explosion venting component is communicated with the shared chamber in the housing.

35. A energy storage device, characterized in that, Comprising an energy storage box body and a plurality of battery clusters according to any one of claims 25 to 34. The plurality of battery clusters are arranged from top to bottom, and the battery module units are arranged on a battery rack in the energy storage box body through a support frame.

36. An energy storage device, characterized in that, Comprising a plurality of battery modules and the temperature control pipeline assembly according to any one of claims 1 to 6; the plurality of battery modules are arranged in sequence in the horizontal direction to form a battery module unit, and the plurality of battery module units are arranged in sequence in the vertical direction to form a battery cluster; the heat exchange inlet of the battery module is connected to the outlet of the primary liquid inlet pipe, and the heat exchange outlet of the battery module is connected to the inlet of the primary liquid return pipe.

37. The energy storage device according to claim 36, wherein, Further comprising a battery rack; the battery rack includes a plurality of mounting brackets arranged in sequence in the vertical direction and a vertical support beam for fixedly connecting the plurality of mounting brackets; the battery module unit is arranged on the mounting bracket.

38. The energy storage device according to claim 37, characterized in that, Both the liquid inlet branch pipeline and the liquid return branch pipeline are embedded and installed in the mounting bracket.

39. The energy storage device according to claim 38, wherein Both the liquid inlet main pipeline and the liquid return main pipeline are embedded and installed in the vertical support beam.

40. An energy storage device, characterized in that, Comprising an energy storage box body, a plurality of battery modules and a temperature control system, the temperature control system includes a temperature control device and the temperature control pipeline assembly according to any one of claims 7 to 14; the plurality of battery modules are arranged in sequence in the horizontal direction to form a battery module unit, the plurality of battery module units are arranged in sequence in the vertical direction to form a battery cluster, and the plurality of battery clusters are linearly arranged in the energy storage box body; the temperature control device is arranged on the same side of each battery cluster in the energy storage box body; a heat exchange device is arranged on the battery module, and the heat exchange device has an inlet and an outlet, serving as the heat exchange inlet and the heat exchange outlet of the battery module, the heat exchange inlet of the battery module is connected to the outlet of the primary liquid inlet pipe, and the heat exchange outlet of the battery module is connected to the inlet of the primary liquid return pipe.

41. The energy storage device according to claim 40, wherein, Further comprising a battery rack, the battery rack includes a plurality of mounting brackets arranged in sequence in the vertical direction and a vertical support beam for fixedly connecting the plurality of mounting brackets; the battery module unit is arranged on the mounting bracket, and both the secondary liquid inlet branch pipeline and the secondary liquid return branch pipeline are embedded and installed in the mounting bracket.

42. The energy storage device according to claim 40, characterized in that, The heat exchange device is a liquid cooling plate or a liquid cooling pipe in contact with the pole column of the battery module or the protective housing of the battery module.

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