A liquid-cooled energy storage pack with integrated lower box

Abstract

The present invention belongs to the technical field of battery liquid cooling, and specifically relates to an integrated lower box body of a liquid-cooled energy storage pack, which includes a battery, a circulation pump and a lower box body structure, wherein the lower box body structure includes a liquid cooling plate, a module mounting frame, a sheet metal and a cover plate; the upper and lower sides of the liquid cooling plate are respectively fixed to the module mounting frame and the sheet metal by riveting, the sheet metal and the cover plate are fixed by bolts, and reinforcements are provided on the front and rear sides of the cover plate, and the reinforcements are used to reinforce the lower box body structure, and the battery is placed in the module mounting frame; two aluminum joints are connected to the right side of the liquid cooling plate, and two embedding holes are provided on the right side of the module mounting frame, and the two aluminum joints are respectively embedded in the embedding holes for introducing liquid, and the two aluminum joints are respectively connected to the output and input pipes of the circulation pump. The device solves the problem that after the current battery is placed in the lower box, the temperature of the battery is too high during operation and the heat dissipation effect is poor, resulting in battery fire.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery liquid cooling, and in particular relates to an integrated lower box body of a liquid-cooled energy storage pack. Background Art

[0002] The integrated lower box of the liquid-cooled energy storage pack is an energy storage pack box with an integrated liquid cooling mechanism, which is mainly used for efficient heat dissipation and protection of battery modules. When using the lower box, the liquid in the lower box is generally circulated to achieve a rapid cooling effect;

[0003] At present, the frequency of circulating liquid is constant. After a battery is used for a long time, it will age, resulting in a rise in temperature. At this time, the initial frequency of liquid circulation cooling is not suitable, and it is very easy to cause the battery to catch fire due to insufficient heat dissipation. This phenomenon has become a problem that needs to be solved urgently by people in this field. Summary of the invention

[0004] The object of the present invention is to provide an integrated lower box body of a liquid-cooled energy storage pack to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an integrated lower box body of a liquid-cooled energy storage pack, comprising a battery, a circulation pump and a lower box body structure, wherein the lower box body structure comprises a liquid cooling plate, a module mounting frame, a sheet metal and a cover plate; the upper and lower sides of the liquid cooling plate are respectively fixed to the module mounting frame and the sheet metal by riveting, the sheet metal and the cover plate are fixed by bolts, and reinforcements are provided on the front and rear sides of the cover plate, and the reinforcements are used to reinforce the lower box body structure, and the battery is placed in the module mounting frame; two aluminum joints are connected to the right side of the liquid cooling plate, and two embedding holes are provided on the right side of the module mounting frame, and the two aluminum joints are respectively embedded in the embedding holes for introducing liquid, and the two aluminum joints are respectively connected to the output and input pipes of the circulation pump for transmitting liquid, the circulation pump is electrically connected to the battery, and an intelligent liquid cooling system is provided in the battery.

[0006] The present invention further illustrates that the intelligent liquid cooling system includes a heat measurement module, a data conversion module and a frequency control module. The heat measurement module is electrically connected to the data conversion module, the data conversion module is electrically connected to the frequency control module, and the frequency control module is electrically connected to the circulation pump; the heat measurement module is used to calculate the heat generated during battery operation through various parameters, the data conversion module is used to convert the generated heat into data and convert it into the operating frequency of the circulation pump, and the frequency control module is used to control the operating frequency of the circulation pump, thereby controlling the frequency of liquid cooling.

[0007] The present invention further illustrates that the heat measurement module includes a cycle monitoring unit, a cycle distinguishing unit, an alarm unit and a heat compensation unit; the cycle monitoring unit, the cycle distinguishing unit, the alarm unit and the heat compensation unit are electrically connected to each other, the cycle monitoring unit is used to monitor the number of times the battery is fully charged in a cycle, the cycle distinguishing unit is used to distinguish the number of fast charges and slow charges in a charging cycle, the alarm unit is used to issue an alarm according to the number of fast charges, and the heat compensation unit is used to comprehensively measure the heat of the battery according to the number of charging cycles and the number of fast charges.

[0008] The present invention further illustrates that the operation steps of the intelligent liquid cooling system include: step S1, the battery is running, and the circulation pump injects and extracts the liquid from the lower box through the aluminum joint to cool the liquid cooling plate, thereby cooling the battery; step S2, during the use of the battery, the cycle monitoring unit is used to monitor the number of times the battery is fully charged in one cycle, and then the heat of the battery is comprehensively calculated according to the number of charging cycles, and the operation frequency of the circulation pump is controlled by the data conversion module and the frequency control module, thereby controlling the liquid cooling frequency; step S3, the number of fast charging and slow charging in the charging cycle is distinguished by the cycle distinguishing unit, and then the battery heat is optimized once according to the number of fast charging, and when the number of fast charging exceeds the system setting value, step S4 is entered, otherwise step S6 is entered; step S4, the aging degree of the battery is calculated according to the number of fast charging cycles, and the battery heat is optimized again according to the aging degree; step S5, an alarm is issued through the alarm unit, and the battery heat data optimized twice is optimized; step S6, the battery is turned off, and the intelligent liquid cooling system stops running.

[0009] The present invention further illustrates that in step S2, ;but , is the heat of the battery, is the maximum heat that the battery can generate, The number of charging cycles, The maximum number of times a battery is charged in one cycle, is the circulation frequency of the circulation pump, is the maximum cycle frequency of the circulation pump.

[0010] The present invention further illustrates that in step S2 and step S3, the thermal data of the battery is optimized once: the number of fast charges is distinguished And the number of slow charging ;Right now , This is the battery heat after optimization.

[0011] The present invention further illustrates that in step S3 and step S4: hour, Number of fast charges set for the system: , The heat generated by the battery during operation due to battery aging. Battery heat after secondary optimization; , , is the aging degree of the battery, is the maximum aging degree of the battery; when hour: .

[0012] The present invention further illustrates that in step S3, step S4 and step S5: When: The alarm unit sounds an alarm to remind you to replace the battery. , The battery heat after three optimizations; hour: .

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the integrated lower box of the liquid-cooled energy storage pack used in the present invention can cool down the battery, and by setting up an intelligent liquid cooling system, the more times the battery is charged in a cycle, the higher the heat generated by the battery, the higher the frequency of the circulation pump when it runs, and thus the higher the frequency of injecting and extracting liquid from the lower box, the more the battery is used, the higher the cooling intensity, which can avoid damage caused by excessive temperature of the battery, the higher the protection intensity, and the cooling effect is greatly improved. Anyway, the operating frequency of the circulation pump is low, thereby relatively saving battery energy consumption and greatly improving the battery life;

[0014] And the battery impulse is divided into fast charging and slow charging, among which fast charging is more harmful to the battery, which reduces the battery performance and increases the heat during operation. Therefore, the heat of the battery during operation is optimized, the accuracy of the heat data is improved, the cooling effect of the battery is further enhanced, and the battery is further protected. When the number of fast charging of the battery is high, the degree of battery aging is relatively high. At this time, by further optimizing the battery's heat data, the battery's heat data is increased, thereby relatively strengthening the liquid cooling frequency of the circulation pump, protecting the battery to the greatest extent, avoiding the temperature increase caused by aging, and the liquid cooling effect is better. It can also remind users to replace the battery. At the same time, the battery load increases, thereby relatively reducing the operating frequency of the circulation pump, and the reduced operating frequency is not large. On the one hand, the cooling effect can be maintained, and on the other hand, the battery load and the battery energy consumption are relatively reduced. Due to excessive aging of the battery, the heat of the battery during operation increases. By relatively reducing the load, the battery can be protected to the greatest extent, avoiding overload damage or even fire, and the safety of battery use can also be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is an exploded view of the present invention;

[0018] Figure 3 It is a schematic diagram of the connection relationship of the intelligent liquid cooling system modules of the present invention;

[0019] In the figure: 1. Liquid cooling plate; 2. Module mounting frame; 3. Sheet metal; 4. Cover plate; 5. Reinforcement; 6. Aluminum joint. DETAILED DESCRIPTION

[0020] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-3 The present invention provides a technical solution: a liquid-cooled energy storage pack integrated lower box, including a battery, a circulation pump and a lower box structure, the lower box structure includes a liquid cooling plate 1, a module mounting frame 2, a sheet metal 3 and a cover plate 4;

[0022] The upper and lower sides of the liquid cooling plate 1 are fixed to the module mounting frame 2 and the sheet metal 3 respectively by riveting, the sheet metal 3 is fixed to the cover plate 4 by bolts, and the front and rear sides of the cover plate 4 are provided with reinforcement members 5, and the reinforcement members 5 are used to reinforce the lower box structure, and the battery is placed in the module mounting frame 2;

[0023] Two aluminum joints 6 are connected to the right side of the liquid cooling plate 1, and two embedding holes are provided on the right side of the module mounting frame 2, and the two aluminum joints 6 are respectively embedded in the embedding holes for introducing liquid, and the two aluminum joints 6 are respectively connected to the output end and input end pipes of the circulation pump for transmitting liquid, and the circulation pump is electrically connected to the battery, and an intelligent liquid cooling system is provided in the battery;

[0024] The battery is placed on the module mounting frame 2, and then the power supply of the circulation pump is connected to the battery. When the battery is running, the circulation pump runs at the same time, and a part of the current is used to drive the circulation pump to run. The circulation pump injects liquid into the lower box through the aluminum joint 6 to dissipate the heat of the liquid cooling plate 1, thereby dissipating the heat of the battery. Through intelligent cooling by the intelligent liquid cooling system, the service life of the battery is increased, and the battery is prevented from being damaged by excessive temperature, thereby protecting the battery.

[0025] The intelligent liquid cooling system includes a heat measurement module, a data conversion module and a frequency control module. The heat measurement module is electrically connected to the data conversion module, the data conversion module is electrically connected to the frequency control module, and the frequency control module is electrically connected to the circulation pump.

[0026] The heat measurement module is used to calculate the heat generated by the battery during operation through various parameters. The data conversion module is used to convert the generated heat into data and convert it into the operating frequency of the circulation pump. The frequency control module is used to control the operating frequency of the circulation pump, thereby controlling the frequency of liquid cooling.

[0027] The heat measurement module includes a cycle monitoring unit, a cycle distinguishing unit, an alarm unit and a heat compensation unit;

[0028] The cycle monitoring unit, the cycle distinguishing unit, the alarm unit and the heat compensation unit are electrically connected to each other. The cycle monitoring unit is used to monitor the number of times the battery is fully charged in a cycle. The cycle distinguishing unit is used to distinguish the number of fast charges and slow charges in a charging cycle. The alarm unit is used to issue an alarm based on the number of fast charges. The heat compensation unit is used to comprehensively measure the heat of the battery based on the number of charging cycles and the number of fast charges.

[0029] The operation steps of the intelligent liquid cooling system include:

[0030] Step S1, the battery is running, and the circulation pump injects and extracts the liquid into and out of the lower box through the aluminum joint 6 to cool the liquid cooling plate 1, thereby cooling the battery;

[0031] Step S2, during the use of the battery, the cycle monitoring unit is used to monitor the number of times the battery is fully charged in one cycle, and then the heat of the battery is comprehensively calculated according to the number of charging cycles, and the operating frequency of the circulation pump is controlled through the data conversion module and the frequency control module, thereby controlling the liquid cooling frequency;

[0032] Step S3, distinguishing the number of fast charging and slow charging in the charging cycle through the cycle distinguishing unit, and then optimizing the battery heat according to the number of fast charging. When the number of fast charging exceeds the system setting value, the process goes to step S4, otherwise it goes to step S6;

[0033] Step S4, calculating the battery aging degree according to the number of fast charging cycles, and then optimizing the battery heat again according to the aging degree;

[0034] Step S5: issuing an alarm through the alarm unit, and performing a third optimization on the battery heat data of the second optimization;

[0035] Step S6: The battery is turned off and the intelligent liquid cooling system stops running.

[0036] In step S2, ;

[0037] but , is the heat of the battery, is the maximum heat that the battery can generate, The number of charging cycles, The maximum number of times a battery is charged in one cycle, is the circulation frequency of the circulation pump, is the maximum circulation frequency of the circulation pump;

[0038] The more times the battery is charged in a cycle, the more heat the battery generates, and the higher the frequency of the circulation pump's operation, and thus the frequency of injecting and extracting liquid from the lower box. The more the battery is used, the higher the cooling intensity, which can prevent the battery from being damaged by excessive temperature, with higher protection intensity and greatly improved cooling effect. Anyway, the circulation pump operates at a low frequency, which relatively saves battery energy consumption and greatly improves battery life.

[0039] In step S2 and step S3, the thermal data of the battery is optimized:

[0040] Distinguish the number of fast charges And the number of slow charging ;

[0041] Right now , The battery heat after an optimization;

[0042] The battery impulse is divided into fast charging and slow charging. Fast charging is more damaging to the battery, which reduces the battery performance and increases the heat during operation. Therefore, the heat of the battery during operation is optimized, the accuracy of the heat data is improved, the cooling effect of the battery is further enhanced, and the battery is further protected.

[0043] In step S3 and step S4:

[0044] when hour, Number of fast charges set for the system: , The heat added during operation due to battery aging;

[0045] , , is the aging degree of the battery, is the maximum aging degree of the battery;

[0046] when hour: ;

[0047] When the battery is fast-charged many times, the degree of battery aging is relatively high. At this time, by further optimizing the battery's thermal data, the battery's thermal data is increased, thereby relatively strengthening the liquid cooling frequency of the circulation pump, protecting the battery to the greatest extent, avoiding the temperature increase caused by aging, and achieving a better liquid cooling effect.

[0048] In step S3, step S4 and step S5:

[0049] when When: The alarm unit sounds an alarm to remind you to replace the battery. , Battery heat after three optimizations;

[0050] when hour: ;

[0051] At this time, the user can be reminded to replace the battery. At the same time, the battery load increases, thereby relatively reducing the operating frequency of the circulation pump, and the reduced operating frequency is not large. On the one hand, the cooling effect can be maintained, and on the other hand, the battery load and battery energy consumption can be relatively reduced. Due to excessive aging of the battery, the heat generated during battery operation increases. By relatively reducing the load, the battery can be protected to the greatest extent to avoid overload damage or even fire, and the safety of battery use can also be greatly improved.

[0052] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0053] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid-cooled energy storage pack with an integrated lower box, comprising a battery, a circulation pump and a lower box structure, characterized in that: The lower box structure comprises a liquid cooling plate (1), a module mounting frame (2), a sheet metal (3) and a cover plate (4); The upper and lower sides of the liquid cooling plate (1) are fixed to the module mounting frame (2) and the sheet metal (3) respectively by riveting, the sheet metal (3) and the cover plate (4) are fixed by bolts, the front and rear sides of the cover plate (4) are provided with reinforcement members (5), and the reinforcement members (5) are used to reinforce the lower box structure, and the battery is placed in the module mounting frame (2); The right side of the liquid cooling plate (1) is connected to two aluminum joints (6), the right side of the module mounting frame (2) is provided with two embedding holes, and the two aluminum joints (6) are respectively embedded in the embedding holes for introducing liquid, the two aluminum joints (6) are respectively connected to the output end and input end pipelines of the circulation pump for transmitting liquid, the circulation pump is electrically connected to the battery, and an intelligent liquid cooling system is provided in the battery, the intelligent liquid cooling system comprises a heat measurement module, a data conversion module and a frequency control module, the heat measurement module is electrically connected to the data conversion module, the data conversion module is electrically connected to the frequency control module, the frequency control module is electrically connected to the circulation pump, the heat measurement module comprises a cycle monitoring unit, a cycle distinguishing unit, an alarm unit and a heat compensation unit, The heat measurement module is used to measure the heat generated by the battery during operation through various parameters, the data conversion module is used to convert the generated heat into data and convert it into the operating frequency of the circulation pump, the frequency control module is used to control the operating frequency of the circulation pump, thereby controlling the frequency of liquid cooling, the cycle monitoring unit, the cycle distinguishing unit, the alarm unit and the heat compensation unit are electrically connected to each other, the cycle monitoring unit is used to monitor the number of times the battery is fully charged in a cycle, the cycle distinguishing unit is used to distinguish the number of fast charges and slow charges in the charging cycle, the alarm unit is used to issue an alarm according to the number of fast charges, and the heat compensation unit is used to comprehensively measure the heat of the battery according to the number of charging cycles and the number of fast charges. The operation steps of the intelligent liquid cooling system include: Step S1, the battery is running, and the circulation pump injects and draws liquid into and out of the lower box through the aluminum joint (6), cooling the liquid cooling plate (1) and thus cooling the battery; Step S2, during the use of the battery, the cycle monitoring unit is used to monitor the number of times the battery is fully charged in one cycle, and then the heat of the battery is comprehensively calculated according to the number of charging cycles, and the operating frequency of the circulation pump is controlled through the data conversion module and the frequency control module, thereby controlling the liquid cooling frequency; Step S3, distinguishing the number of fast charging and slow charging in the charging cycle through the cycle distinguishing unit, and then optimizing the battery heat according to the number of fast charging. When the number of fast charging exceeds the system setting value, the process goes to step S4, otherwise it goes to step S6; Step S4, calculating the battery aging degree according to the number of fast charging cycles, and then optimizing the battery heat again according to the aging degree; Step S5: issuing an alarm through the alarm unit, and performing a third optimization on the battery heat data of the second optimization; Step S6: the battery is turned off and the intelligent liquid cooling system stops running; In the step S2, ; but , is the heat of the battery, is the maximum heat that the battery can generate, The number of charging cycles, The maximum number of times a battery is charged in one cycle, is the circulation frequency of the circulation pump, is the maximum circulation frequency of the circulation pump; In the steps S2 and S3, the thermal data of the battery is optimized: Distinguish the number of fast charges And the number of slow charging ; Right now , This is the battery heat after optimization.

2. The integrated lower box of a liquid-cooled energy storage pack according to claim 1 is characterized in that: In the steps S3 and S4: when hour, Number of fast charges set for the system: , The heat generated by the battery during operation due to battery aging. Battery heat after secondary optimization; , , is the aging degree of the battery, is the maximum aging degree of the battery; when hour: .

3. The integrated lower box of a liquid-cooled energy storage pack according to claim 2 is characterized in that: In the steps S3, S4 and S5: when When: The alarm unit sounds an alarm to remind you to replace the battery. , Battery heat after three optimizations; when hour: .

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