Liquid cooling 1P52S lithium iron phosphate battery module structure

Abstract

The invention provides a liquid-cooled 1P52S lithium iron phosphate battery module structure, which comprises a PACK box body, battery modules, a battery management unit BMU, a CCS acquisition integrated wire harness, a liquid-cooled unit temperature control system and an MSD manual maintenance switch, the plurality of battery modules are connected in series, each battery module comprises a plurality of battery cells, and the adjacent battery cells are separated by a mica sheet material and are fixed by a structural adhesive; the CCS integrated wire harness collects and uploads the voltage, current and temperature of the battery cell, and monitors and controls each parameter of the battery cell through the battery management unit BMU; the liquid cooling unit temperature control system comprises a liquid cooling plate structure arranged at the bottom of the PACK box body, a flow channel arranged in the liquid cooling plate structure, and a liquid cooling unit communicated with the flow channel. According to the invention, the battery cells are connected in series to 13S to form a modular design, the battery pack assembly is firstly assembled, and then the whole battery pack is assembled into the battery module, so that the production efficiency in the module assembly process can be improved. The temperature difference of the cells in the module is better controlled, and the service life of the battery is effectively prolonged.

Description

Technical Field

[0001] The present application relates to the field of lithium battery energy storage technology, and in particular to a liquid-cooled 1P52S lithium iron phosphate battery module structure. Background Art

[0002] The application environment of existing power energy storage systems is relatively complex, and there are working conditions in extremely cold, extremely hot and normal temperature environments. In order to keep the internal battery cells, high-voltage devices, fire protection devices, etc. of the energy storage system in the best working conditions, the energy storage system is usually equipped with thermal management equipment (air conditioning / liquid cooling unit) to cool or heat the battery cells, ensuring a more stable and good operation of the lithium battery power energy storage system.

[0003] With the increase in energy demand and the popularization of renewable energy, energy storage battery modules have been widely used as an important energy storage technology. Summary of the invention

[0004] The present application proposes a liquid-cooled 1P52S lithium iron phosphate battery module structure, aiming to solve the problems of the above-mentioned background technology.

[0005] The present application proposes a liquid-cooled 1P52S lithium iron phosphate battery module structure, including a PACK box, a battery module, a battery management unit BMU, a CCS acquisition integrated wiring harness, a liquid cooling unit temperature control system and an MSD manual maintenance switch. Multiple battery modules are connected in series, and the battery module includes multiple battery cells. Adjacent battery cells are separated by mica sheet materials and fixed by structural adhesive;

[0006] The CCS integrated wiring harness collects and uploads the voltage, current and temperature of the battery cells, and monitors and controls the various parameters of the battery cells through the battery management unit BMU;

[0007] The temperature control system of the liquid cooling unit includes a liquid cooling plate structure arranged at the bottom of the PACK box, a flow channel arranged in the liquid cooling plate structure, and a liquid cooling unit connected to the flow channel.

[0008] Preferably, adjacent battery modules are connected by series copper bars, and aluminum bars are used to connect single cells in series between each battery module. Aluminum bars are used for output at the ends of single battery modules, and the battery modules are connected in series by terminal blocks.

[0009] Preferably, the battery module includes a battery cell which is extruded and fastened by an extrusion tool, and the module is fixed and tied firmly with a steel belt or a plastic-steel belt.

[0010] Preferably, the battery module comprises plastic end plates arranged on both sides of the battery core, and the plastic end plates are used for electrical insulation between the copper busbars in the module and the PACK box.

[0011] Preferably, the positive and negative copper bars of the battery module are connected to the power terminals, the power terminals are respectively fixed on the front panel of the box, and two adjacent battery modules are connected by an external wiring harness to form a battery cluster structure.

[0012] Preferably, heat is exchanged between the battery module and the liquid cooling plate via a thermally conductive gel.

[0013] Preferably, an explosion-proof valve is provided on the PACK box.

[0014] Preferably, it also includes a fire nozzle and a fire detector, which can monitor whether there is smoke inside the battery box during the battery charging and discharging process; the fire nozzle transports the fire medium to the inside of each PACK box through the connection of the fire pipeline.

[0015] The beneficial effects of the liquid-cooled 1P52S lithium iron phosphate battery module structure in this application are as follows:

[0016] The battery module structure adopted by the present invention has good insulation protection.

[0017] The present invention connects the battery cells in series to 13S to form a modular design, first assembles the battery pack components, and then installs the entire battery pack into the battery module, which can improve the production efficiency in the module assembly process.

[0018] The structure of the present invention can better control the temperature difference of the battery cells in the module, effectively extending the service life of the battery.

[0019] The present invention is compatible with various capacity batteries, thus increasing the capacity of the battery pack.

[0020] The present invention has PACK-level fire protection, can transport the fire protection medium into the interior of the PACK box, and can quickly suppress the thermal runaway phenomenon of the battery inside the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of this application;

[0022] Figure 2 This is a schematic diagram of the explosion structure of this application;

[0023] Among them, 1. PACK box; 2. Battery module; 3. Battery management unit BMU; 4. CCS acquisition integrated wiring harness; 5. Liquid cooling unit temperature control system; 6. MSD manual maintenance switch; 7. Plastic end plate; 8. Fire nozzle; 9. Fire detector; 10. Explosion-proof valve; 11. Plastic box cover; 12. Battery cell; 13. Mica sheet; 14. Liquid cooling plate structure; 15. Flow channel. DETAILED DESCRIPTION

[0024] In conjunction with the drawings in the embodiments of the present application, the schemes in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments in the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0026] This application proposes a liquid-cooled 1P52S lithium iron phosphate battery module structure, referring to Figure 1 and Figure 2 , including a PACK box 1, a battery module 2, a battery management unit BMU3, a CCS collection integrated wiring harness 4, a liquid cooling unit temperature control system 5 and an MSD manual maintenance switch 6, multiple battery modules 2 are connected in series, and multiple battery modules are connected in series. The battery module includes multiple battery cells 12, and adjacent battery cells 12 are separated by mica sheets 13 and fixed by structural adhesive; the CCS integrated wiring harness collects and uploads the voltage, current and temperature of the battery cell 12, and monitors and controls the various parameters of the battery cell 12 through the battery management unit BMU3; the liquid cooling unit temperature control system 5 includes a liquid cooling plate structure 14 arranged at the bottom of the PACK box 1, a flow channel 15 arranged in the liquid cooling plate structure 14, and a liquid cooling unit connected to the flow channel 15. The battery module 2 uses four 1P13S battery modules 2 connected in series to form a 1P52S overall battery module 2. The CCS integrated wiring harness is used to collect, collect and upload the voltage, current and temperature of the battery cell 12, and the battery management unit BMU3 is used to monitor and control the various parameters of the battery cell 12. Each module uses the method of full voltage collection (52 voltage values) and half temperature collection (7 temperature values), and collects the data of the battery cell 12 to the battery management slave control unit BMU, and uploads it to the master control unit BCU (battery cluster management unit). The top of the PACK box 1 uses a plastic box cover 11 made of PPS+GF material, which is easy to form and enhances the insulation performance between the internal components and the sheet metal of the box, better ensuring safety.

[0027] In one embodiment, adjacent battery modules 2 are connected by series copper bars, and aluminum bars are used to connect a single battery cell 12 in series between each battery module 2. Aluminum bars are used for output at the ends of a single battery module 2, and the battery modules 2 are connected in series by terminal blocks to achieve upward capacity compatibility.

[0028] In one embodiment, the battery module 2 includes a battery cell 12 which is squeezed and fastened by an extrusion tool, and the module is fixed and tied firmly with a steel belt or a plastic steel belt.

[0029] In one embodiment, the battery module 2 includes plastic end plates 7 disposed on both sides of the battery core 12 , and the plastic end plates 7 are used for electrical insulation between the copper busbars in the module and the PACK box 1 .

[0030] In one embodiment, the positive and negative copper bars of the battery module 2 are connected to the power terminals, the power terminals are fixed to the front panel of the box, and two adjacent battery modules are connected through an external wiring harness to form a battery cluster structure. At the same time, the signal terminal is connected to the BMU through a series wiring harness and connected in series to the battery cluster through an external signal line.

[0031] In one embodiment, the battery module 2 and the liquid cooling plate exchange heat via a thermally conductive gel, and the thermally conductive gel completes the circulation of the cooling system between the flow channel 15 and the liquid cooling unit.

[0032] In one embodiment, the PACK box 1 is provided with an explosion-proof valve 10, which can quickly release the super-strong force inside the battery module if thermal runaway occurs in the battery to prevent the battery from exploding.

[0033] In one embodiment, a fire nozzle 8 and a fire detector 9 are also included, which can monitor whether there is smoke generated inside the battery box during the battery charging and discharging process; the fire nozzle 8 transports the fire medium to the inside of each PACK box through the connection of the fire pipeline, which can effectively suppress the thermal runaway phenomenon.

[0034] The beneficial effects of the liquid-cooled 1P52S lithium iron phosphate battery module structure in this application are as follows:

[0035] The battery module structure adopted by the present invention has good insulation protection.

[0036] The present invention connects the battery cells 12 to 13S in series to form a modular design, first assembles the battery pack components, and then installs the entire battery pack into the battery module, which can improve the production efficiency in the module assembly process.

[0037] The structure of the present invention can better control the temperature difference of the battery cells 12 in the module, effectively extending the battery life.

[0038] The present invention is compatible with battery cells 12 of various capacities, thereby increasing the capacity of the battery pack.

[0039] The present invention has PACK-level fire protection, can transport the fire protection medium into the PACK box 1, and can quickly suppress the thermal runaway phenomenon of the battery inside the box.

[0040] The above are only partial or preferred embodiments of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A liquid-cooled 1P52S lithium iron phosphate battery module structure, characterized in that: It includes a PACK box, a battery module, a battery management unit BMU, a CCS collection integrated wiring harness, a liquid cooling unit temperature control system, and an MSD manual maintenance switch. Multiple battery modules are connected in series. The battery module includes multiple battery cells. Adjacent battery cells are separated by mica sheets and fixed by structural adhesive. The CCS integrated wiring harness collects and uploads the voltage, current and temperature of the battery cells, and monitors and controls the various parameters of the battery cells through the battery management unit BMU; The temperature control system of the liquid cooling unit includes a liquid cooling plate structure arranged at the bottom of the PACK box, a flow channel arranged in the liquid cooling plate structure, and a liquid cooling unit connected to the flow channel.

2. The liquid-cooled 1P52S lithium iron phosphate battery module structure according to claim 1, characterized in that: Adjacent battery modules are connected with series copper bars, and aluminum bars are used to connect single cells in series between each battery module. Aluminum bars are used for output at the ends of single battery modules, and the battery modules are connected in series by terminal blocks.

3. The liquid-cooled 1P52S lithium iron phosphate battery module structure according to claim 1, characterized in that: The battery module includes a battery cell which is squeezed and fastened by an extrusion tool, and a steel belt or a plastic-steel belt is used to fix and tie the module firmly.

4. The liquid-cooled 1P52S lithium iron phosphate battery module structure according to claim 1, characterized in that: The battery module includes plastic end plates arranged on both sides of the battery core, and the plastic end plates are used for electrical insulation between the copper busbars in the module and the PACK box.

5. The liquid-cooled 1P52S lithium iron phosphate battery module structure according to claim 1, characterized in that: The positive and negative copper bars of the battery module are connected to the power terminals. The power terminals are fixed on the front panel of the box respectively. The two adjacent battery modules are connected through an external wiring harness to form a battery cluster structure.

6. The liquid-cooled 1P52S lithium iron phosphate battery module structure according to claim 1, characterized in that: The battery module and the liquid cooling plate exchange heat via the thermally conductive gel.

7. The liquid-cooled 1P52S lithium iron phosphate battery module structure according to claim 1, characterized in that: The PACK box is provided with an explosion-proof valve.

8. The liquid-cooled 1P52S lithium iron phosphate battery module structure according to claim 1, characterized in that: It also includes fire nozzles and fire detectors, which can monitor whether there is smoke inside the battery box during battery charging and discharging; the fire nozzles transport the fire medium to the inside of each PACK box through the connection of the fire pipeline.

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