Temperature control scheme for truck starting lithium battery pack

By using the temperature control scheme of active cooling in the lithium battery package in the truck, using the water -cooled heat dissipation system and semiconductor refrigeration film to solve the problem of lithium battery packs in high -temperature environment, and realized more efficient temperature management and safety improvement. Essence

CN119340551APending Publication Date: 2025-01-21JIANGSU YOULIKA NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202411474410.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-22
Publication Date
2025-01-21

AI Technical Summary

Technical Problem

Truck-starting lithium battery packs are prone to risk of thermal runaway in high temperature environments. The existing passive heat dissipation methods cannot effectively manage the battery pack temperature, affecting the normal use of users.

Method used

An active cooling temperature control scheme is adopted. By setting up a water-cooling heat dissipation system and semiconductor refrigeration fins, coolant and fans are used to actively cool the lithium battery pack to ensure that the battery operates in an efficient temperature range.

Benefits of technology

Effectively manage the temperature of the lithium battery module, reduce the risk of thermal discharge, improve the safety and work efficiency of the battery, and avoid the problem of slow natural cooling speed of the battery pack caused by high temperature.

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Abstract

The invention relates to the technical field of automobile lithium batteries, and discloses a temperature control scheme for a truck starting lithium battery pack, which comprises the following steps of: 1, arranging a water-cooling heat dissipation system, arranging a heat absorption pipe or a heat absorption plate of the water-cooling heat dissipation system on the outer surface of the truck starting lithium battery pack in a surrounding and attaching manner, and enabling cooling liquid to flow through the heat absorption pipe or the heat absorption plate, the cold end of the semiconductor chilling plate is attached to the heat conduction position of the water-cooling heat dissipation pipeline, and the hot end of the semiconductor chilling plate is exposed in the air; and 2, when the lithium battery pack needs to be cooled, the semiconductor chilling plate is controlled to start working, the liquid pump pushes refrigerant liquid to flow through the cold end of the semiconductor chilling plate firstly, then low-temperature cooling liquid flows to the lithium battery pack, and therefore the lithium battery pack is cooled. By improving the thermal management system of the truck starting lithium battery pack, the lithium battery module can be actively cooled; the temperature of the lithium battery module is better managed, so that the battery works in an efficient temperature interval; the safety of the truck lithium battery module is improved, and the thermal runaway risk is reduced.
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Description

Technical Field

[0001] The present invention relates to the technical field of automotive lithium batteries, and in particular to a temperature control solution for a truck starting lithium battery pack. Background Art

[0002] Truck starting lithium batteries are usually installed outside the cab and are easily affected by the ambient temperature. In the summer, when the temperature is high, the working temperature of the lithium battery can reach above 45°C, and because the lithium battery pack itself generates heat when working, the internal temperature of the lithium battery pack can reach above 60°C. The normal operating temperature range of lithium batteries is usually required to be below 60°C. There is a risk of thermal runaway when charging and discharging lithium batteries in a high temperature environment.

[0003] To deal with this situation, the current technology is to put the starting lithium battery pack into a thermal protection state, prohibiting charging and discharging, and wait for the lithium battery module to naturally cool to a safe temperature before allowing it to work. This passive heat dissipation method cannot effectively manage the battery pack temperature and affects the normal use of users. In addition, in the high temperature environment in summer, the working efficiency of the truck starting lithium battery is limited and cannot work efficiently; when the truck starting lithium battery pack triggers thermal protection, the natural cooling rate is slow, affecting the normal use of users; during the use of the truck starting lithium battery pack, if there are other heat sources on the body of the vehicle to conduct heat, the lithium battery pack cannot actively dissipate heat, and the battery pack is at risk of thermal runaway. Therefore, we propose a temperature control solution for truck starting lithium battery packs. Summary of the invention

[0004] The purpose of the present invention is to provide a temperature control solution for a truck starting lithium battery pack. By improving the thermal management system of the truck starting lithium battery pack, the lithium battery module can be actively cooled; the temperature of the lithium battery module can be better managed so that the battery works in an efficient temperature range; the safety of the truck lithium battery module is improved, the risk of thermal runaway is reduced, and the problems raised in the background technology are solved.

[0005] To achieve the above object, the present invention provides the following technical solution: a temperature control solution for a truck starting lithium battery pack, comprising the following steps:

[0006] Step 1: Set up a water cooling and heat dissipation system, with a heat absorption tube or a heat absorption plate surrounding and attached to the outer surface of the truck starter lithium battery pack, the coolant flows through the inside of the heat absorption tube or the heat absorption plate, and a semiconductor cooling sheet is provided, the cold end of which is attached to the heat conduction part of the water cooling and heat dissipation pipe, and the hot end is exposed to the air. A fan is also provided at the hot end of the semiconductor cooling sheet, and the heat accumulated at the hot end of the semiconductor cooling sheet is blown into the environment through the fan;

[0007] Step 2: When the lithium battery pack needs to be cooled, the semiconductor refrigeration chip is controlled to start working. The liquid pump pushes the refrigerant to flow through the cold end of the semiconductor refrigeration chip first, and then the low-temperature coolant flows to the lithium battery pack, thereby cooling the lithium battery pack. The heat accumulated at the hot end of the semiconductor refrigeration chip is blown into the environment through the fan.

[0008] As a preferred embodiment of the present invention, the water cooling system in step one further includes a liquid pump for pumping the coolant to circulate in the cooling system.

[0009] As a preferred embodiment of the present invention, the water cooling and heat dissipation system in step one further includes a liquid storage tank for storing coolant in the water cooling and heat dissipation system.

[0010] As a preferred embodiment of the present invention, a copper plate is provided at the position where the cold end of the semiconductor refrigeration plate in step one contacts, and the cooling liquid flows through the inside of the copper plate.

[0011] As a preferred embodiment of the present invention, the water cooling and heat dissipation system in step one is further provided with a control board, which is powered by a lithium battery pack and controls the semiconductor refrigeration plate.

[0012] As a preferred embodiment of the present invention, in step 2, a temperature sensor is installed on the surface of the lithium battery pack, the temperature of the lithium battery pack is monitored by the temperature sensor, and the controller automatically controls the working state of the semiconductor refrigeration sheet.

[0013] As a preferred embodiment of the present invention, in step 2, the liquid flow rate is adjusted by adjusting the rotation speed of the liquid pump, thereby controlling the heat exchange rate so that the lithium battery pack is always in the most efficient temperature range.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention can actively cool down the lithium battery module by improving the thermal management system of the truck starter lithium battery pack; better manage the temperature of the lithium battery module so that the battery works in an efficient temperature range; improve the safety of the truck lithium battery module and reduce the risk of thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0017] Figure 1 This is a system block diagram of a temperature control solution for a truck starting lithium battery pack according to the present invention. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] Embodiment 1

[0020] See also Figure 1 The present invention provides a technical solution: a temperature control solution for a truck starting lithium battery pack. The solution adopts an active cooling method and uses a semiconductor refrigeration module to cool the battery module of the truck starting lithium battery.

[0021] The semiconductor refrigeration module includes a water-cooled heat dissipation system. The heat absorption tube or heat absorption plate of the cold and heat dissipation system is attached to the outer surface of the truck starter lithium battery pack. The coolant flows through the inside of the heat absorption tube or the heat absorption plate. A semiconductor refrigeration sheet is also provided. The cold end of the semiconductor refrigeration sheet is in contact with the heat conduction part of the water-cooled heat dissipation pipeline, and the hot end is exposed to the air. A copper plate is provided at the position where the cold end of the semiconductor refrigeration sheet is in contact, and the coolant flows through the inside of the copper plate.

[0022] A fan is also provided at the hot end of the semiconductor refrigeration plate, and the heat accumulated at the hot end of the semiconductor refrigeration plate is blown into the environment through the fan. The water-cooling heat dissipation system also includes a liquid pump for pumping the coolant to circulate in the cooling system. The water-cooling heat dissipation system also includes a liquid storage tank for storing the coolant in the water-cooling heat dissipation system.

[0023] The water cooling system is also provided with a control board, which is powered by a lithium battery pack and controls the semiconductor refrigeration sheet.

[0024] When the truck starts, the semiconductor refrigeration chip and liquid pump start working immediately. The liquid pump pushes the refrigerant to flow through the cold end of the semiconductor refrigeration chip first, and then the low-temperature coolant flows to the lithium battery pack, thereby cooling the lithium battery pack. The heat accumulated at the hot end of the semiconductor refrigeration chip is blown into the environment through the fan.

[0025] Embodiment 2

[0026] See also Figure 1 The present invention provides a technical solution: a temperature control solution for a truck starting lithium battery pack. The solution adopts an active cooling method and uses a semiconductor refrigeration module to cool the battery module of the truck starting lithium battery.

[0027] The semiconductor refrigeration module includes a water-cooled heat dissipation system. The heat absorption tube or heat absorption plate of the cold and heat dissipation system is attached to the outer surface of the truck starter lithium battery pack. The coolant flows through the inside of the heat absorption tube or the heat absorption plate. A semiconductor refrigeration sheet is also provided. The cold end of the semiconductor refrigeration sheet is in contact with the heat conduction part of the water-cooled heat dissipation pipeline, and the hot end is exposed to the air. A copper plate is provided at the position where the cold end of the semiconductor refrigeration sheet is in contact, and the coolant flows through the inside of the copper plate.

[0028] A fan is also provided at the hot end of the semiconductor refrigeration plate, and the heat accumulated at the hot end of the semiconductor refrigeration plate is blown into the environment through the fan. The water-cooling heat dissipation system also includes a liquid pump for pumping the coolant to circulate in the cooling system. The water-cooling heat dissipation system also includes a liquid storage tank for storing the coolant in the water-cooling heat dissipation system.

[0029] The water cooling system is also provided with a control board, which is powered by a lithium battery pack and controls the semiconductor refrigeration sheet.

[0030] When the lithium battery pack needs to be cooled, the semiconductor refrigeration plate and liquid pump are manually controlled to start working. The liquid pump pushes the refrigerant to flow through the cold end of the semiconductor refrigeration plate first, and then the low-temperature coolant flows to the lithium battery pack, thereby cooling the lithium battery pack. The heat accumulated at the hot end of the semiconductor refrigeration plate is blown into the environment through the fan.

[0031] Embodiment 3

[0032] See also Figure 1 The present invention provides a technical solution: a temperature control solution for a truck starting lithium battery pack. The solution adopts an active cooling method and uses a semiconductor refrigeration module to cool the battery module of the truck starting lithium battery.

[0033] The semiconductor refrigeration module includes a water-cooled heat dissipation system. The heat absorption tube or heat absorption plate of the cold and heat dissipation system is attached to the outer surface of the truck starter lithium battery pack. The coolant flows through the inside of the heat absorption tube or the heat absorption plate. A semiconductor refrigeration sheet is also provided. The cold end of the semiconductor refrigeration sheet is in contact with the heat conduction part of the water-cooled heat dissipation pipeline, and the hot end is exposed to the air. A copper plate is provided at the position where the cold end of the semiconductor refrigeration sheet is in contact, and the coolant flows through the inside of the copper plate.

[0034] A fan is also provided at the hot end of the semiconductor refrigeration plate, and the heat accumulated at the hot end of the semiconductor refrigeration plate is blown into the environment through the fan. The water-cooling heat dissipation system also includes a liquid pump for pumping the coolant to circulate in the cooling system. The water-cooling heat dissipation system also includes a liquid storage tank for storing the coolant in the water-cooling heat dissipation system.

[0035] The water cooling system is also equipped with a control panel, which is powered by a lithium battery pack and controls the semiconductor cooling film. A temperature sensor is also installed on the surface of the lithium battery pack to monitor the temperature of the lithium battery pack. The controller automatically controls the working state of the semiconductor cooling film.

[0036] When the temperature sensor monitors that the temperature of the lithium battery pack is too high and determines that the lithium battery pack needs to be cooled, the controller automatically controls the semiconductor refrigeration plate and the liquid pump to start working. The liquid pump pushes the refrigerant to flow through the cold end of the semiconductor refrigeration plate first, and then the low-temperature coolant flows to the lithium battery pack, thereby cooling the lithium battery pack. The heat accumulated at the hot end of the semiconductor refrigeration plate is blown into the environment through the fan.

[0037] Embodiment 4

[0038] See also Figure 1 The present invention provides a technical solution: a temperature control solution for a truck starting lithium battery pack. The solution adopts an active cooling method and uses a semiconductor refrigeration module to cool the battery module of the truck starting lithium battery.

[0039] The semiconductor refrigeration module includes a water-cooled heat dissipation system. The heat absorption tube or heat absorption plate of the cold and heat dissipation system is attached to the outer surface of the truck starter lithium battery pack. The coolant flows through the inside of the heat absorption tube or the heat absorption plate. A semiconductor refrigeration sheet is also provided. The cold end of the semiconductor refrigeration sheet is in contact with the heat conduction part of the water-cooled heat dissipation pipeline, and the hot end is exposed to the air. A copper plate is provided at the position where the cold end of the semiconductor refrigeration sheet is in contact, and the coolant flows through the inside of the copper plate.

[0040] A fan is also provided at the hot end of the semiconductor refrigeration plate, and the heat accumulated at the hot end of the semiconductor refrigeration plate is blown into the environment through the fan. The water-cooling heat dissipation system also includes a liquid pump for pumping the coolant to circulate in the cooling system. The water-cooling heat dissipation system also includes a liquid storage tank for storing the coolant in the water-cooling heat dissipation system.

[0041] The water cooling system is also equipped with a control panel, which is powered by a lithium battery pack and controls the semiconductor cooling film. A temperature sensor is also installed on the surface of the lithium battery pack to monitor the temperature of the lithium battery pack. The controller automatically controls the working state of the semiconductor cooling film.

[0042] When the temperature sensor monitors that the temperature of the lithium battery pack is too high and determines that the lithium battery pack needs to be cooled, the controller automatically controls the semiconductor refrigeration plate and the liquid pump to start working. The liquid pump pushes the refrigerant to flow through the cold end of the semiconductor refrigeration plate first, and then the low-temperature coolant flows to the lithium battery pack, thereby cooling the lithium battery pack. The heat accumulated at the hot end of the semiconductor refrigeration plate is blown into the environment through the fan.

[0043] In addition, the liquid pump motor uses a stepper motor, which can adjust the speed of the liquid pump to adjust the liquid flow rate, thereby controlling the heat exchange rate so that the lithium battery pack is always in the most efficient temperature range.

[0044] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A temperature control solution for a truck starting lithium battery pack, characterized in that: The following steps are involved: Step 1: Set up a water cooling and heat dissipation system, with a heat absorption tube or a heat absorption plate surrounding and attached to the outer surface of the truck starter lithium battery pack, the coolant flows through the inside of the heat absorption tube or the heat absorption plate, and a semiconductor cooling sheet is provided, the cold end of which is attached to the heat conduction part of the water cooling and heat dissipation pipe, and the hot end is exposed to the air. A fan is also provided at the hot end of the semiconductor cooling sheet, and the heat accumulated at the hot end of the semiconductor cooling sheet is blown into the environment through the fan; Step 2: When the lithium battery pack needs to be cooled, the semiconductor refrigeration chip is controlled to start working. The liquid pump pushes the refrigerant to flow through the cold end of the semiconductor refrigeration chip first, and then the low-temperature coolant flows to the lithium battery pack, thereby cooling the lithium battery pack. The heat accumulated at the hot end of the semiconductor refrigeration chip is blown into the environment through the fan.

2. A temperature control solution for a truck starting lithium battery pack according to claim 1, characterized in that: The water cooling system in step one also includes a liquid pump for pumping coolant to circulate in the cooling system.

3. A temperature control solution for a truck starting lithium battery pack according to claim 1, characterized in that: The water cooling and heat dissipation system in step one also includes a liquid storage tank for storing coolant in the water cooling and heat dissipation system.

4. A temperature control solution for a truck starting lithium battery pack according to claim 1, characterized in that: A copper plate is provided at the position where the cold end of the semiconductor refrigeration plate in the step 1 contacts, and the cooling liquid flows through the inside of the copper plate.

5. The temperature control solution for a truck starting lithium battery pack according to claim 1, characterized in that: The water cooling and heat dissipation system in step one is also provided with a control board, which is powered by a lithium battery pack and controls the semiconductor refrigeration plate.

6. The temperature control solution for a truck starting lithium battery pack according to claim 1, characterized in that: In the step 2, a temperature sensor is installed on the surface of the lithium battery pack, the temperature of the lithium battery pack is monitored by the temperature sensor, and the controller automatically controls the working state of the semiconductor cooling sheet.

7. The temperature control solution for a truck starting lithium battery pack according to claim 1, characterized in that: In the step 2, the liquid flow rate is adjusted by adjusting the rotation speed of the liquid pump, thereby controlling the heat exchange rate so that the lithium battery pack is always in the most efficient temperature range.