Nitrogen cooling structure for lithium battery

Abstract

The utility model relates to the technical field of lithium battery heat dissipation, in particular to a nitrogen cooling structure for a lithium battery, which comprises a cooling component for cooling a lithium battery module in a battery box, the cooling assembly comprises a guide rail fixed in the battery box, a guide block matched with the guide rail, a telescopic rod fixed on the outer side of the guide block, a case fixed at the telescopic end of the telescopic rod, a support arm movably arranged on the side surface of the case, an air injection pipe fixed at the top of the support arm, and an air inlet end arranged at the tail part of the air injection pipe; the processor is embedded above the tail of the air spraying pipe, an execution module and a communication module are arranged in the processor, and the execution module is connected with the motor, the telescopic rod and the motor. According to the lithium battery module cooling device, the cooling assembly capable of being adjusted at multiple positions and multiple angles is arranged to spray nitrogen gas to the lithium battery module, so that the lithium battery module is cooled, meanwhile, the mounting structure of the gas spraying end is reduced, the operation cost is reduced, the lithium battery module monomer can be accurately cooled, and the lithium battery module cooling device has relatively high practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery heat dissipation, in particular to a nitrogen cooling structure for lithium batteries. Background Art

[0002] Lithium battery packs are usually composed of multiple lithium batteries connected in series or in parallel to enhance the power supply performance of lithium batteries. However, when multiple batteries are powered at the same time, heat generation is inevitable. Especially in high temperature environments, the heating phenomenon of lithium battery packs is particularly serious, which may cause the battery to overheat, burn or even explode, posing serious safety hazards and affecting the battery life.

[0003] In view of the above problems, an existing public patent (publication number CN 209860105 U) discloses a nitrogen cooling and heat dissipation lithium battery pack, wherein the lithium battery pack comprises a receiving cavity and a battery box, wherein the receiving cavity is installed inside the battery box, wherein the receiving cavity is used to install 6 groups of lithium batteries, wherein the 6 groups of lithium batteries are arranged side by side in two rows, and further comprises a nitrogen cooling device communicated with the interior of the lithium battery pack, wherein the nitrogen cooling device comprises a nitrogen tank, wherein the nitrogen tank comprises an air inlet and an air outlet, wherein the air inlet is located below the nitrogen tank, wherein a circulating air pump is installed on the inner side of the air inlet, wherein the air outlet is located above the nitrogen tank, wherein a semiconductor refrigerator is installed opposite to the air outlet, wherein the air inlet and the air outlet are respectively connected to a gas pipeline, wherein the gas pipeline is located inside the lithium battery, wherein the gas pipeline is viewed from above as an inverted "mountain" shape, wherein a complete circulation structure is formed between the gas pipeline and the nitrogen tank, wherein an explosion-proof solenoid valve is arranged between the gas pipeline and the air inlet, wherein an expansion valve is arranged on the outer side of the explosion-proof solenoid valve, and wherein a first temperature sensor is arranged inside the nitrogen tank.

[0004] When the nitrogen cooling structure is actually used, heat is dissipated through a pipeline circulation arrangement, which has a low heat dissipation efficiency. Nitrogen cooling is generally used when conventional heat dissipation cannot meet the heat dissipation requirements of lithium batteries. What is needed is instantaneous heat dissipation, not continuous heat dissipation. Therefore, the nitrogen cooling structure cannot quickly cool the lithium battery, and its continuous operation will increase the operating cost of the lithium battery module. To this end, the utility model proposes a nitrogen cooling structure for lithium batteries to achieve improvements on the above problems. Utility Model Content

[0005] The utility model aims to provide a nitrogen cooling structure for lithium batteries to solve the problems that the existing nitrogen cooling structure for lithium batteries proposed in the above background technology is insufficient in practicality and cannot instantly cool high-temperature lithium batteries.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nitrogen cooling structure for lithium batteries, comprising a cooling assembly for cooling a lithium battery module in a battery box; the cooling assembly comprises a guide rail fixed inside the battery box, a guide block matched with the guide rail, a telescopic rod fixed to the outside of the guide block, a chassis fixed to the telescopic end of the telescopic rod, a support arm movably arranged on the side of the chassis, an air jet pipe fixed to the top of the support arm, an air inlet end arranged at the tail of the air jet pipe, and a processor embedded above the tail of the air jet pipe.

[0007] Preferably, a motor is fixed to the end of the guide rail, the output shaft of the motor is connected to a screw rod, and the screw rod cooperates with the guide block.

[0008] Preferably, the inner side of the guide block protrudes outward, and the protrusion matches the depression of the inner wall of the guide rail groove.

[0009] Preferably, the chassis has a built-in motor, and the output shaft of the motor is fixed to the end of the support arm.

[0010] Preferably, the processor has a built-in execution module and a communication module, and the execution module is connected to the motor, the telescopic rod and the motor.

[0011] Preferably, the processor has a built-in air valve, and the air valve is arranged in a channel connecting the air inlet end to the air injection pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model provides a cooling assembly that can be adjusted at multiple positions and angles to spray nitrogen to the lithium battery module, thereby cooling the lithium battery module and reducing the installation structure of the spray end. The lithium battery can be instantly cooled in the form of direct contact, and the lithium battery module monomer can be accurately cooled to avoid safety accidents. Under normal conditions, a simple heat dissipation structure such as a fan can be used to dissipate the heat of the lithium battery. The comprehensive use reduces the operating cost of the battery box and has great practical value.

[0014] Specifically, when a temperature alarm occurs in the battery box, the jet pipe adjusts its position according to the cooling position until it moves to the position where cooling is required. Then the air valve in the processor adjusts the nitrogen jet volume to quickly cool down the lithium battery. The position of the jet pipe is adjusted by the rotation of the screw driven by the motor to achieve the movement of the guide block. The telescopic rod moves synchronously with the guide block. At the same time, the telescopic rod itself is also used to adjust the position of the chassis. The built-in motor of the chassis adjusts the angle of the jet pipe through the support arm. The installation direction of the guide rail is determined by the actual use requirements. The above adjustments are combined to complete the multi-position and multi-angle adjustment of the jet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of one side of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the other side of the overall structure of the utility model;

[0017] Figure 3 It is a side schematic diagram of the overall structure of the utility model.

[0018] In the figure: 1. guide rail; 2. screw; 3. motor; 4. guide block; 5. telescopic rod; 6. support arm; 7. chassis; 8. jet pipe; 9. processor; 10. air intake end. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0020] See also Figure 1-3 , in the figure: This embodiment is a preferred implementation of the technical solution, a nitrogen cooling structure for lithium batteries, including a cooling assembly for cooling a lithium battery module in a battery box; the cooling assembly includes a guide rail 1 fixed inside the battery box, a guide block 4 matched with the guide rail 1, a telescopic rod 5 fixed to the outside of the guide block 4, a chassis 7 fixed to the telescopic end of the telescopic rod 5, an arm 6 movably arranged on the side of the chassis 7, an air jet 8 fixed to the top of the arm 6, an air inlet end 10 arranged at the tail of the air jet 8, and a processor 9 embedded above the tail of the air jet 8;

[0021] It should be noted that the cooling assembly involved in the present application is used in a battery box where lithium battery modules are centrally installed. By setting a cooling assembly that can be adjusted in multiple positions and angles to spray nitrogen to the lithium battery module, the lithium battery module can be cooled while reducing the installation structure of the spray end, reducing the operating cost, and accurately cooling the lithium battery module monomer, which has great practical value. Specifically, according to the temperature detection information in the battery box, the overall ambient temperature in the battery box and the temperature signals of some lithium battery modules can be judged (this technology can be easily implemented using conventional sensors, and its principle is not described in detail here. The temperature measurement of the battery box is used as the temperature of the present invention. The premise of using the cooling component in the application), when the temperature alarm appears, the jet pipe 8 adjusts its position according to the cooling position until it moves to the place where cooling is required, and then the air valve in the processor 9 adjusts the nitrogen jet volume to quickly cool the lithium battery, wherein the position of the jet pipe 8 is adjusted by the motor 3 driving the rotation of the screw 2 to realize the position movement of the guide block 4, the telescopic rod 5 moves synchronously with the guide block 4, and the telescopic rod 4 itself is also used to adjust the position of the chassis 7, the built-in motor of the chassis 7 adjusts the angle of the jet pipe 8 through the support arm 6, and the installation direction of the guide rail 1 is determined by the actual use requirements, and the above adjustments are combined to complete the multi-position and multi-angle adjustment of the jet pipe 8.

[0022] Among them Figure 1-3 As shown, a motor 3 is fixed to the end of the guide rail 1, and a screw 2 is connected to the output shaft of the motor 3, and the screw 2 cooperates with a guide block 4; the inner side of the guide block 4 protrudes outward, and the protrusion cooperates with the concave inner wall of the groove of the guide rail 1;

[0023] It should be noted that: when the motor 3 is started, its conveying shaft drives the screw 2 to rotate, and the screw 2 drives the guide block 4 to move linearly along the inside of the guide rail 1. The movement of the guide block 4 will drive the linear movement of the telescopic rod 5, and finally realize the adjustment of the injection position of the injection tube 8. During the linear movement of the guide block 4, the interaction between its own inner protrusion and the inner wall depression of the groove of the guide rail 1 makes its operation stable.

[0024] The chassis 7 has a built-in motor, and the output shaft of the motor is fixed to the end of the arm 6;

[0025] It should be noted that the motor built into the chassis 7 is used to drive the rotation of the support arm 6, wherein the output shaft of the motor passes through the chassis 7 and is fixed to the end of one of the support arms 6. When the motor is started, its output shaft drives the rotation of the support arm 6, and the jet pipe 8 fixed to the support arm 6 rotates accordingly, thereby achieving adjustment of the jet angle. The motor is a relatively common structure at present, and its principle is not further described in detail here. At the same time, the peripheral side of the chassis 7 is hollowed out for heat dissipation of the motor itself.

[0026] The processor 9 has built-in execution module and communication module, and the execution module is connected with the motor 3, the telescopic rod 5 and the motor; the processor 9 has built-in air valve, and the air valve is arranged in the channel where the air inlet end 10 is connected to the air injection pipe 8;

[0027] It should be noted that: the communication module built into the processor 9 interacts with the management end, and the management end sends instructions to the execution module through the communication module. After receiving the instructions, the execution module controls the changes in the working states of the motor 3, the telescopic rod 5, the motor, and the air valve. The setting of the air valve is used to control the nitrogen injection amount of the injection pipe 8. When the operating state of the above-mentioned components changes, the operating results are fed back to the management end through the communication module. According to actual usage requirements, corresponding detection elements can be added, and this application does not make further restrictive descriptions.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A nitrogen cooling structure for lithium batteries, comprising a cooling assembly for cooling a lithium battery module in a battery box; characterized in that: The cooling assembly comprises a guide rail (1) fixed inside the battery box, a guide block (4) matched with the guide rail (1), a telescopic rod (5) fixed outside the guide block (4), a chassis (7) fixed to the telescopic end of the telescopic rod (5), a support arm (6) movably arranged on the side of the chassis (7), an air injection pipe (8) fixed to the top of the support arm (6), an air inlet end (10) arranged at the rear of the air injection pipe (8), and a processor (9) embedded above the rear of the air injection pipe (8).

2. A nitrogen cooling structure for lithium battery according to claim 1, characterized in that: A motor (3) is fixed to the end of the guide rail (1); an output shaft of the motor (3) is connected to a screw rod (2); and the screw rod (2) cooperates with a guide block (4).

3. A nitrogen cooling structure for lithium batteries according to claim 1, characterized in that: The inner side of the guide block (4) protrudes outward, and the protrusion matches the concave inner wall of the groove of the guide rail (1).

4. A nitrogen cooling structure for lithium battery according to claim 1, characterized in that: The chassis (7) has a built-in motor, and the output shaft of the motor is fixed to the end of the support arm (6).

5. A nitrogen cooling structure for lithium battery according to claim 1, characterized in that: The processor (9) has a built-in execution module and a communication module, and the execution module is connected to the motor (3), the telescopic rod (5) and the motor.

6. A nitrogen cooling structure for lithium batteries according to claim 1, characterized in that: The processor (9) has a built-in air valve, and the air valve is arranged in a channel connecting the air inlet end (10) to the air injection pipe (8).

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