CN202444036U - Semiconductor water-cooling battery cooling device - Google Patents

Abstract

The utility model discloses a cooling device for a semiconductor water-cooled battery. The exterior of the power battery pack communicates with a cooling water tank for storing cooling liquid through a water inlet pipe and a water outlet pipe connected to each other to form a circulation; the water inlet pipe is provided with a A water pump that promotes cooling liquid circulation, a temperature sensor is provided on the outlet pipe, and the cooling water tank is connected to a semiconductor cooling device; a controller is also included, and the input end of the controller is connected to the temperature sensor and the power battery pack The output end of the controller is electrically connected with the semiconductor cooling device and the water pump. The utility model combines the semiconductor cooling device and water cooling to cool the power battery pack, reduces the volume of the cooling water tank, reduces the noise of the cooling system, has no special requirements for the installation position of the cooling water tank, enhances the cooling and heat dissipation effect, and the cooling effect is not affected by the outside world. The influence of temperature fully meets the requirements of the power battery pack for the cooling system.

Description

A semiconductor water-cooled battery cooling device

technical field

The utility model belongs to the field of vehicle power battery thermal management systems, in particular to a battery cooling device based on semiconductor refrigeration.

Background technique

Under the background that the whole world is committed to protecting the natural environment, reducing environmental pollution is an important measure at present. For the automotive industry, it has become an urgent requirement to promote the use of green and non-polluting energy. Therefore, hybrid and electric drives rely on batteries. The technology of electric energy as the driving force has also developed rapidly. Driving with electric energy requires multiple high-power power batteries, which are arranged according to rules to form a power battery module. The normal operation of the battery module is affected by many factors, among which temperature is an important factor. When the battery is working, it will generate heat. If the temperature is too high, it will directly affect the working performance and life of the battery. Set the cooling system to cool down the battery module so that it works in the optimum temperature zone.

At present, the cooling of the battery module in the existing technology mostly adopts the mode of air cooling combined with water cooling. As shown in Figure 1, the cooling liquid flows from the cooling water tank to the power battery pack through the water pump, and flows back to the power battery pack for cooling after heat exchange with the power battery. The water tank and the cooling water tank rely on the cooling fan next to the cooling water tank to dissipate heat from the coolant that has absorbed the heat of the power battery pack and flows back to the cooling water tank. This cooling method has certain requirements for the installation position of the cooling water tank, which must be installed in the ventilation position of the whole vehicle, generally at the rear of the front partition; in order to achieve the cooling effect, the shape of the cooling water tank needs to be made flat and easy to Heat dissipation, so the area occupied by the water tank is relatively large. Moreover, a high-power cooling fan needs to be arranged next to the cooling water tank, and the noise generated when the fan is working also affects the comfort of the vehicle. The biggest disadvantage of this cooling method is that it is greatly affected by the external temperature, because even if the cooling liquid dissipates heat through the cooling fan, the temperature of the cooling liquid after heat dissipation is basically close to the ambient temperature and cannot be lower than the ambient temperature, so when the external ambient temperature is high At this time, the temperature of the coolant is also high, which affects the heat dissipation effect of the power battery pack.

In the prior art, there are also methods for improving the above-mentioned heat dissipation methods, such as the Chinese patent CN03274312.2 power lithium-ion secondary battery pack, in which the cooling device also uses a semiconductor cooling device, but it is combined with air cooling and uses a heat dissipation surface Passive heat dissipation, semiconductor contact surface is small, and the air inside the battery module dissipates slowly.

Utility model content

In view of the above-mentioned defects in the prior art, the purpose of this utility model is to propose a semiconductor water-cooled battery cooling device to overcome the deficiencies in the prior art.

The purpose of this utility model will be achieved through the following technical solutions:

A semiconductor water-cooled battery cooling device, used for cooling vehicle power battery packs, the exterior of the power battery packs communicates with a cooling water tank for storing cooling liquid through mutually connected water inlet pipes and water outlet pipes to form a circulation; The water inlet pipe is provided with a water pump to promote cooling liquid circulation, the water outlet pipe is provided with a temperature sensor, and the cooling water tank is connected with a semiconductor cooling device; a controller is also included, and the input end of the controller is connected to the temperature sensor. The sensor is electrically connected with the power battery pack, and the output terminal of the controller is electrically connected with the semiconductor cooling device and the water pump.

Preferably, the semiconductor water-cooled battery cooling device above, wherein: the semiconductor cooling device includes a semiconductor cooling element, the cooling surface of the semiconductor cooling element is closely connected to the cooling aluminum, and the heat dissipation surface is closely connected to the heat dissipation device; The cooling aluminum is arranged in the cooling water tank.

Preferably, the cooling device for semiconductor water-cooled batteries mentioned above, wherein: the cooling aluminum is in the shape of a cube, with a plurality of grids evenly distributed in the middle, which increases the cooling area of the cooling aluminum and achieves the effect of rapid cooling; The cooling aluminum is sealed and welded to the cooling water tank.

Preferably, the above-mentioned cooling device for semiconductor water-cooled batteries, wherein: the heat dissipation device is a fan.

Preferably, the semiconductor water-cooled battery cooling device above further includes an auxiliary water tank communicating with the cooling water tank, and a pressure cover is provided on the cooling water tank.

The outstanding effects of the utility model are: the utility model combines the semiconductor cooling device and water cooling to cool the power battery pack, cancels the high-power fan, reduces the volume of the cooling water tank, and makes the cooling water tank develop in the direction of miniaturization and light weight; The noise of the system increases the comfort of the vehicle; there is no special requirement for the installation position of the cooling water tank, thereby canceling the special requirements for the assembly position of the vehicle; the semiconductor cooling device enhances the cooling effect and reduces the power battery pack. The cooling time is long, and the cooling effect is not affected by the external temperature, which fully meets the requirements of the power battery pack for the cooling system.

The specific implementation of the utility model will be described in further detail below in conjunction with the accompanying drawings of the embodiments, so as to make the technical solution of the utility model easier to understand and grasp.

Description of drawings

Fig. 1 is the schematic diagram of the cooling system of prior art;

Fig. 2 is the schematic diagram of the utility model embodiment;

Fig. 3 is a partial top view of the utility model embodiment;

Fig. 4 is a partial perspective view of the embodiment of the utility model.

Detailed ways

Example:

。传冷铝3由纯铝制成，表面经阳极氧化处理。传冷铝3与冷却水箱1通过热板机溶胶方式焊接，完全密封。 In this embodiment, a cooling device for a semiconductor water-cooled battery, as shown in Figures 2 to 4, is used to cool a vehicle power battery pack. The water tank is connected to form a circulation; the water inlet pipe is provided with a water pump to promote the circulation of the coolant, the water outlet pipe is provided with a temperature sensor, and the cooling water tank 1 is connected with the semiconductor cooling device; it also includes a controller, the input end of the controller is connected to the temperature sensor and The power battery pack is electrically connected, and the output terminal of the controller is electrically connected with the semiconductor cooling device and the water pump. The semiconductor cooling device includes a semiconductor refrigeration element 2, the cooling surface of the semiconductor refrigeration element 2 is closely connected with the cooling aluminum 3, and the heat dissipation surface is closely connected with the cooling device fan 4; The grille increases the cooling area of the cooling aluminum 3 to achieve the effect of rapid cooling. According to the Thomson effect: It can be concluded that using the fan 4 to dissipate heat from the heat dissipation surface of the semiconductor cooling element 2 can produce a better cooling effect. In the formula:

. The cooling aluminum 3 is made of pure aluminum, and the surface is anodized. The cooling aluminum 3 and the cooling water tank 1 are welded by hot plate electrosol, and are completely sealed.

Further, it also includes an auxiliary water tank communicating with the cooling water tank, and the cooling water tank is provided with a pressure cover. The circulation of coolant between the cooling water tank and the auxiliary water tank is controlled by the pressure cap. When the coolant is used to water-cool the vehicle power battery module and fill the coolant, the cooling water tank needs to be filled first, and then an appropriate amount of coolant should be added to the auxiliary water tank; When the cooling system is working, when the pressure in the cooling water tank is too low, the pressure cover on the cooling water tank will be opened, and the cooling water tank will be replenished with coolant in the auxiliary water tank; on the contrary, when the pressure in the cooling water tank is too high, the pressure on the cooling water tank will The cover will also be opened, and the coolant in the cooling water tank will flow into the auxiliary water tank to achieve the purpose of depressurizing the cooling water tank.

可以得出，控制器通过控制输出给半导体冷却装置的电流大小即可以控制半导体制冷元件的冷接点温度，从而控制半导体冷却装置的制冷量。式中：

为放热或吸热功率，

为比例系数，称为珀尔帖系数，

为工作电流，

为温差电动势率，

为冷接点温度。 The working order of the semiconductor water-cooled battery cooling device of this embodiment is issued by the controller, and the signals of the power battery pack and the temperature sensor are sent to the controller, and the controller adjusts the working status of the semiconductor cooling device and the water pump in time. First, the controller determines the working timing of the entire cooling system according to the temperature signal sent by the power battery pack. Then, when the cooling system is working, the controller receives the temperature signal sent by the battery pack and the The temperature sensor feedback signal is used to determine the cooling condition of the power battery pack, and the working pressure of the water pump and the cooling capacity of the semiconductor cooling device are adjusted in time to meet the cooling requirements of the power battery pack. According to the Peltier effect:

It can be concluded that the controller can control the cold junction temperature of the semiconductor cooling element by controlling the current output to the semiconductor cooling device, thereby controlling the cooling capacity of the semiconductor cooling device. In the formula:

is the exothermic or endothermic power,

is a proportionality coefficient, called the Peltier coefficient,

is the working current,

is the thermoelectric potential rate,

is the cold junction temperature.

In this embodiment, the semiconductor cooling device and water cooling are combined to cool the power battery pack, the high-power fan is canceled, the volume of the cooling water tank is reduced, and the cooling water tank is developed in the direction of miniaturization and light weight; the noise of the cooling system is reduced, and the overall vehicle is increased comfort; there is no special requirement for the installation position of the cooling water tank, thereby canceling the special requirement for the assembly position of the vehicle; the semiconductor cooling device enhances the cooling and heat dissipation effect, reduces the cooling time required for the power battery pack, and the cooling effect is not Affected by the external temperature, it fully meets the requirements of the power battery pack for the cooling system.

The utility model still has multiple implementation modes, and all technical solutions formed by equivalent transformation or equivalent transformation all fall within the protection scope of the utility model.

Claims (5)

1. a semiconductor water cooling battery cooling device is used to cool off the vehicle power battery pack, and the cooling water tank that water inlet pipe and the outlet pipe and of the outside of said power battery pack through mutual perforation is used to store cooling fluid is communicated with, to form circulation; Said water inlet pipe is provided with the water pump of a promotion liquid circulation, and said outlet pipe is provided with a temperature sensor, it is characterized in that: said cooling water tank is connected with the semiconductor cooling device; Also comprise a controller, the input of said controller is electrically connected with said temperature sensor and power battery pack, and the output of said controller is electrically connected with said semiconductor cooling device and water pump.

2. a kind of semiconductor water cooling battery cooling device according to claim 1; It is characterized in that: said semiconductor cooling device comprises the semiconductor refrigerating element; The chill surface of said semiconductor refrigerating element is close to the cold aluminium of biography and is connected, and radiating surface is close to heat abstractor and is connected; The cold aluminium of said biography is arranged in the said cooling water tank.

3. a kind of semiconductor water cooling battery cooling device according to claim 2, it is characterized in that: the cold aluminium of said biography is cubic type, and the centre is evenly distributed with a plurality of barriers, cold aluminium of said biography and said cooling water tank sealing welding.

4. a kind of semiconductor water cooling battery cooling device according to claim 2, it is characterized in that: said heat abstractor is a fan.

5. a kind of semiconductor water cooling battery cooling device according to claim 1 is characterized in that: also comprise the secondary water tank that is communicated with said cooling water tank, said cooling water tank is provided with a pressure cover.

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