An ultrahigh-magnification soft package battery module and a soft package battery

Abstract

The utility model provides a kind of ultrahigh rate soft package battery module and soft package battery, it is related to battery heat dissipation technical field, the battery module includes multiple electric core basic modules, multiple electric core basic modules are sequentially arranged, first heat insulation layer is set between adjacent two electric core basic modules, electric core basic module includes: support plate, the top and bottom of support plate are formed with radiating surface, radiating surface is used to and liquid cooling plate is attached setting, the inside of support plate is arranged with multiple air ducts from top to bottom;Two soft package electric cores, two soft package electric cores are respectively attached with the two side surfaces of support plate;Plastic insulating piece, the surface of plastic insulating piece is distributed with the vent hole being communicated with cavity, one end of plastic insulating piece and support plate is detachably connected, the other end of support plate is used to be relatively arranged with radiating fan;The battery module adopts air cooling and liquid cooling integrated mode to effectively solve the problem that temperature is too high and temperature difference is too large that soft package battery appears under ultrahigh rate discharging condition, reduces the risk of thermal runaway.

Description

Technical Field

[0001] This utility model belongs to the field of battery heat dissipation technology, and more specifically, relates to an ultra-high rate soft-pack battery module and a soft-pack battery. Background Technology

[0002] Traditional pouch batteries integrate an aluminum plate between two adjacent pouch cells and use a single air cooler for heat conduction. The heat conduction of a single aluminum plate and a single air cooler is limited. Under ultra-high rate charging and discharging or high temperature environments, the heat of the cells and busbars cannot be dissipated in time, and it will also lead to uneven heat distribution, which can easily form hot spots in local areas, resulting in problems such as excessive temperature and large temperature difference, affecting the safety and life of the battery. Therefore, there is still considerable room for improvement in the thermal conductivity of traditional pouch batteries. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing an ultra-high rate soft-pack battery module and a soft-pack battery. This solves the problem mentioned in the background art where traditional soft-pack batteries integrate an aluminum plate between two adjacent soft-pack cells and use a single air cooler for heat conduction. The heat conduction of a single aluminum plate is limited, and the heat of the cell cannot be dissipated in time, which easily leads to problems such as excessively high temperature and excessive temperature difference.

[0004] To achieve the above objectives, this utility model provides an ultra-high rate soft-pack battery module. The battery module includes multiple cell base modules arranged sequentially, with a first heat insulation layer disposed between adjacent cell base modules. Each cell base module includes:

[0005] The support plate has heat dissipation surfaces at its top and bottom, which are used to fit in contact with the liquid cooling plate. Multiple air ducts are arranged inside the support plate from top to bottom.

[0006] Two soft-pack battery cells are respectively attached to the two sides of the bracket plate;

[0007] A plastic insulating component has an internal cavity and ventilation holes that communicate with the cavity on its surface. Some of the ventilation holes communicate with the air duct. The plastic insulating component is detachably connected to one end of the support plate, and the other end of the support plate is used to be positioned opposite to the cooling fan.

[0008] Busbar, which is detachably connected to the plastic insulation component.

[0009] Preferably, the first heat insulation layer is an aerogel pad.

[0010] Preferably, each side of the support plate is bonded to one of the pouch cells via an adhesive layer.

[0011] Preferably, the adhesive layer is flame-retardant double-sided adhesive.

[0012] Preferably, the heat dissipation surface extends to both sides of the support plate so that the support plate is I-shaped. One side of the heat dissipation surface is provided with multiple protrusions, and the other side of the heat dissipation surface is provided with multiple grooves. When two adjacent battery cell base modules are assembled, the multiple protrusions of one battery cell base module are respectively embedded in the multiple grooves of the other battery cell base module.

[0013] Preferably, the air duct is arranged along the length of the support plate, and an inclined partition beam is formed between two adjacent air ducts.

[0014] Preferably, the plastic insulating component is snap-fitted to one end of the bracket plate, and the busbar is snap-fitted to the plastic insulating component.

[0015] An ultra-high rate pouch battery, the pouch battery comprising:

[0016] Ultra-high rate soft-pack battery module;

[0017] Two liquid cooling plates are respectively disposed at the top and bottom of the battery module. A heat-conducting layer is disposed between the top of the battery module and one of the liquid cooling plates, and a heat-conducting layer is also disposed between the bottom of the battery module and the other liquid cooling plate.

[0018] Two end plates are respectively disposed at both ends of the battery module, and a second heat insulation layer is disposed between each end of the battery module and one of the end plates;

[0019] At least one cooling fan is provided, which is disposed opposite to the other end of the plurality of support plates of the battery module.

[0020] Preferably, the thermally conductive layer is a thermally conductive silicone pad.

[0021] Preferably, the second heat insulation layer is an aerogel pad.

[0022] This utility model provides an ultra-high rate soft-pack battery module and a soft-pack battery. Its advantages are as follows: the battery module has a first heat insulation layer between two adjacent cell base modules, effectively preventing heat spread between them; the support plate of the battery module has multiple air ducts inside, and the heat dissipation surface of the support plate is used to attach to the liquid cooling plate. Two soft-pack cells are respectively attached to the two sides of the support plate. The plastic insulation component has a cavity inside, and its surface has ventilation holes communicating with the cavity. The plastic insulation component is connected to one end of the support plate, and the other end of the support plate is used to be opposite to the cooling fan. The busbar is connected to the plastic insulation component. This battery module, during heat dissipation... When hot, the cooling fan inside the air duct generates airflow for heat dissipation, and the ventilation holes also generate airflow for heat exchange. The airflow dissipates heat for the soft-pack cells on both sides of the support plate, as well as for the busbar. At the same time, the cooling support plate can conduct heat that cannot be dissipated by air cooling on the large surfaces of the support plate to the upper and lower cooling surfaces, and is further cooled by the liquid cooling plate at the bottom. This battery module adopts an integrated air cooling and liquid cooling method to effectively solve the problems of excessive temperature and large temperature difference in soft-pack batteries under ultra-high rate discharge conditions, reduce the risk of thermal runaway, improve battery safety and lifespan, avoid performance degradation of the power system, and improve the safety and reliability of the entire system operation.

[0023] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0024] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0025] Figure 1 A three-dimensional structural schematic diagram of an ultra-high rate soft-pack battery according to an embodiment of the present invention is shown;

[0026] Figure 2 An exploded structural diagram of an ultra-high rate soft-pack battery according to an embodiment of the present invention is shown.

[0027] Figure 3 A three-dimensional structural schematic diagram of an ultra-high rate soft-pack battery module according to an embodiment of the present invention is shown.

[0028] Figure 4 An exploded structural diagram of the cell base module of an ultra-high rate soft-pack battery module according to an embodiment of the present invention is shown.

[0029] Figure 5A three-dimensional structural schematic diagram of a support plate for an ultra-high rate soft-pack battery module according to an embodiment of the present invention is shown.

[0030] Figure 6 A schematic diagram of the end structure of a support plate for an ultra-high rate soft-pack battery module according to an embodiment of the present invention is shown.

[0031] Figure 7 A schematic diagram of the airflow direction structure of an ultra-high rate soft-pack battery module according to an embodiment of the present invention is shown.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Battery cell base module; 2. First insulation layer; 3. Support plate; 4. Air duct; 5. Soft-pack battery cell; 6. Liquid cooling plate; 7. Plastic insulation component; 8. Ventilation hole; 9. Cooling fan; 10. Busbar; 11. Adhesive layer; 12. Boss; 13. Groove; 14. Thermal conductive layer; 15. End plate; 16. Second insulation layer. Detailed Implementation

[0034] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0035] like Figures 3-7 As shown, this utility model provides an ultra-high rate soft-pack battery module, which includes multiple cell base modules 1 arranged sequentially. A first heat insulation layer 2 is provided between two adjacent cell base modules 1. The cell base module 1 includes:

[0036] The support plate 3 has heat dissipation surfaces at its top and bottom, which are used to fit in contact with the liquid cooling plate 6. Multiple air ducts 4 are arranged inside the support plate 3 from top to bottom.

[0037] Two soft-pack battery cells 5 are respectively attached to the two sides of the bracket plate 3;

[0038] The plastic insulating component 7 has a cavity inside, and ventilation holes 8 that communicate with the cavity are distributed on the surface of the plastic insulating component 7. Some of the ventilation holes 8 communicate with the air duct 4. The plastic insulating component 7 is detachably connected to one end of the support plate 3, and the other end of the support plate 3 is used to be set opposite to the cooling fan 9.

[0039] Busbar 10 is detachably connected to plastic insulation component 7.

[0040] Specifically, to address the problem that traditional soft-pack batteries integrate an aluminum plate between two adjacent soft-pack cells and use a single air-cooled unit for heat conduction, the limited heat conduction of the single aluminum plate means that the heat from the cells cannot be dissipated in time, easily leading to excessively high temperatures and large temperature differences, this application provides an ultra-high rate soft-pack battery module. This battery module has a first heat insulation layer 2 between two adjacent cell base modules 1, effectively preventing heat spread between the two adjacent cell base modules 1. The support plate 3 of this battery module has multiple air ducts 4 inside, and the heat dissipation surface of the support plate 3 is used to attach to the liquid cooling plate 6. Two soft-pack cells 5 are respectively attached to the two sides of the support plate 3. The plastic insulating component 7 has a cavity inside, and its surface has ventilation holes 8 communicating with the cavity. The plastic insulating component 7 is connected to one end of the support plate 3, and the other end of the support plate 3... The end is set opposite to the cooling fan 9, and the busbar 10 is connected to the plastic insulator 7. When the battery module is dissipating heat, the air duct inside the air duct will form an airflow for heat dissipation under the action of the cooling fan 9, and an airflow for heat exchange will also be formed in the ventilation hole 8. The airflow dissipates heat to the soft-pack cells 5 on both sides of the bracket plate 3 and also dissipates heat to the busbar 10. At the same time, the heat dissipation bracket plate can conduct the heat that cannot be dissipated in time by air cooling on the large surface of both sides of the bracket plate 3 to the upper and lower heat dissipation surfaces, and cooperate with the lower liquid cooling plate 6 for secondary cooling. The battery module adopts an integrated air cooling and liquid cooling method to effectively solve the problems of excessive temperature and excessive temperature difference of soft-pack batteries under ultra-high rate discharge conditions, reduce the risk of thermal runaway, improve the safety and life of the battery, avoid the performance degradation of the power system, and improve the safety and reliability of the entire system operation.

[0041] Preferably, the first heat insulation layer 2 is an aerogel pad.

[0042] Specifically, the properties of the aerogel pad can effectively prevent heat propagation between two adjacent battery cell base modules 1.

[0043] Preferably, each side of the support plate 3 is bonded to a pouch cell 5 by an adhesive layer 11.

[0044] Specifically, the adhesive bonding method is simple and easy to use in groups.

[0045] Preferably, the adhesive layer 11 is a flame-retardant double-sided adhesive.

[0046] Specifically, flame-retardant double-sided tape achieves adhesion while also providing flame-retardant properties. It is not easily burned in flame or high-temperature environments and can effectively prevent the spread of fire.

[0047] Preferably, the heat dissipation surface extends to both sides of the support plate 3 so that the support plate 3 is in the shape of an I-beam. One side of the heat dissipation surface is provided with a plurality of protrusions 12 and the other side of the heat dissipation surface is provided with a plurality of grooves 13. When two adjacent battery cell base modules 1 are assembled, the plurality of protrusions 12 of one battery cell base module 1 are respectively embedded into the plurality of grooves 13 of the other battery cell base module 1.

[0048] Specifically, the upper and lower heat dissipation surfaces of the bracket plate 3 are provided with bosses 12 and grooves 13 to facilitate group assembly and positioning.

[0049] Preferably, the air duct 4 is arranged along the length of the support plate 3, and an inclined partition beam is formed between two adjacent air ducts 4.

[0050] Specifically, an inclined partition beam is formed between two adjacent air ducts 4, which can absorb the expansion force generated during the charging and discharging of the soft-pack battery cell 5 and extend the service life of the battery module.

[0051] Preferably, the plastic insulating component 7 is snapped to one end of the support plate 3, and the busbar 10 is snapped to the plastic insulating component 7.

[0052] Specifically, the snap-fit ​​connection method makes grouping simple, installation convenient, and improves grouping efficiency.

[0053] like Figure 1 and Figure 2 As shown, an ultra-high rate pouch battery includes:

[0054] Ultra-high rate soft-pack battery module;

[0055] Two liquid cooling plates 6 are respectively disposed on the top and bottom of the battery module. A heat-conducting layer 14 is disposed between the top of the battery module and one of the liquid cooling plates 6, and a heat-conducting layer 14 is also disposed between the bottom of the battery module and the other liquid cooling plate 6.

[0056] Two end plates 15 are respectively disposed at both ends of the battery module, and a second heat insulation layer 16 is disposed between each end of the battery module and one end plate 15.

[0057] At least one cooling fan 9 is provided, which is positioned opposite to the other end of the plurality of support plates 3 of the battery module.

[0058] Specifically, two liquid cooling plates 6 directly replace the traditional module housing and are installed on the top and bottom sides of the soft-pack battery module, which can achieve efficient heat dissipation and reduce system complexity. The heat-conducting layer 14 is used to achieve efficient heat exchange between the liquid cooling plate 6 and the heat dissipation surface. The second heat insulation layer 16 is used to achieve heat insulation between the end of the battery module and the end plate 15, so as to avoid the outermost battery base module 1 being lower than other units due to the excessive heat conduction speed of the end plate 15, which would lead to an excessive temperature difference in the overall battery module.

[0059] Preferably, the thermally conductive layer 14 is a thermally conductive silicone pad.

[0060] Preferably, the second heat insulation layer 16 is an aerogel pad.

[0061] In summary, when the battery module of this application is implemented on a pouch battery, the battery module simultaneously adopts air cooling and liquid cooling to achieve effective heat dissipation during ultra-high rate discharge.

[0062] The partition beam of the air duct profile support plate is set at an inclination, which can not only ensure the heat conduction of the air duct 4, but also absorb the expansion force generated during the charging and discharging of the soft-pack battery cell 5, thus extending the service life of the battery module.

[0063] The surface of the plastic insulating component 7 is provided with ventilation holes 8 that communicate with the cavity, which effectively dissipates heat from the busbar 10 and reduces the overall temperature difference of the battery module.

[0064] An aerogel pad is placed between the two battery cell base modules 1 to effectively prevent the heat spread inside the battery module caused by the runaway of the individual soft-pack battery cell 5.

[0065] An aerogel pad is placed between the outermost battery base module 1 and the end plate 15 of the battery module for heat insulation. This effectively avoids the phenomenon that the temperature of the outermost battery base module 1 is lower than that of other battery base modules 1 due to the excessive heat conduction speed of the end plate 15, which would lead to an excessive temperature difference in the overall battery module.

[0066] The upper and lower structural components of the battery module were eliminated, and the liquid cooling plate 6 was directly integrated. This not only reduced the number of structural components in the battery module, reduced the complexity of the battery module and saved space, but also shortened the heat conduction path, reduced thermal resistance and improved the system heat dissipation efficiency.

[0067] The liquid cooling plate has 6 symmetrical inlet and outlet channels, and the upper and lower liquid cooling plates can be interchanged, reducing the production cost of battery module parts.

[0068] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A high-rate soft-pack battery module, characterized in that, The battery module includes multiple cell base modules, which are arranged sequentially. A first heat insulation layer is provided between two adjacent cell base modules. Each cell base module includes: The support plate has heat dissipation surfaces at its top and bottom, which are used to fit in contact with the liquid cooling plate. Multiple air ducts are arranged inside the support plate from top to bottom. Two soft-pack battery cells are respectively attached to the two sides of the bracket plate; A plastic insulating component has an internal cavity and ventilation holes that communicate with the cavity on its surface. Some of the ventilation holes communicate with the air duct. The plastic insulating component is detachably connected to one end of the support plate, and the other end of the support plate is used to be positioned opposite to the cooling fan. Busbar, which is detachably connected to the plastic insulation component.

2. The ultra-high rate soft-pack battery module according to claim 1, characterized in that, The first heat insulation layer is an aerogel pad.

3. The ultra-high rate soft-pack battery module according to claim 1, characterized in that, Each side of the support plate is bonded to one of the pouch cells via an adhesive layer.

4. The ultra-high rate soft-pack battery module according to claim 3, characterized in that, The adhesive layer is flame-retardant double-sided adhesive.

5. The ultra-high rate soft-pack battery module according to claim 1, characterized in that, The heat dissipation surface extends to both sides of the support plate to make the support plate I-shaped. One side of the heat dissipation surface is provided with multiple protrusions, and the other side of the heat dissipation surface is provided with multiple grooves. When two adjacent battery cell base modules are assembled, the multiple protrusions of one battery cell base module are respectively embedded in the multiple grooves of the other battery cell base module.

6. The ultra-high rate soft-pack battery module according to claim 1, characterized in that, The air duct is arranged along the length of the support plate, and an inclined partition beam is formed between two adjacent air ducts.

7. The ultra-high rate soft-pack battery module according to claim 1, characterized in that, The plastic insulating component is snapped to one end of the bracket plate, and the busbar is snapped to the plastic insulating component.

8. A high-rate soft-pack battery, characterized in that, The pouch battery includes: The ultra-high rate soft-pack battery module according to any one of claims 1-7; Two liquid cooling plates are respectively disposed at the top and bottom of the battery module. A heat-conducting layer is disposed between the top of the battery module and one of the liquid cooling plates, and a heat-conducting layer is also disposed between the bottom of the battery module and the other liquid cooling plate. Two end plates are respectively disposed at both ends of the battery module, and a second heat insulation layer is disposed between each end of the battery module and one of the end plates; At least one cooling fan is provided, which is disposed opposite to the other end of the plurality of support plates of the battery module.

9. A high-rate soft-pack battery according to claim 8, characterized in that, The thermally conductive layer is a thermally conductive silicone pad.

10. A high-rate soft-pack battery according to claim 8, characterized in that, The second insulation layer is an aerogel pad.

Images