CN217956075U - Conductive medium and liquid cooling control system for conductive medium - Google Patents

Abstract

The utility model discloses a conducting medium and conducting medium liquid cooling control system. The conductive medium comprises a conductor, a sleeve body and a temperature sensor, the sleeve body is sleeved on the conductor, and two ends of the conductor are respectively exposed out of the sleeve body; a gap serving as a heat exchange channel of the cooling liquid is arranged inside the sleeve body; the sleeve body is provided with a liquid inlet and a liquid outlet which are connected with the cooling liquid heat exchange channel; the conductive medium is connected with a liquid cooling system through a liquid inlet and a liquid outlet, a temperature sensor is connected with the liquid cooling system and a temperature controller, the temperature sensor is used for detecting the temperature information of the conductive medium and feeding the temperature information back to the temperature controller, the temperature controller is used for controlling whether the liquid cooling system works or not, and the conductive medium is cooled by supplying the cooling medium to circulate in a cooling liquid heat exchange channel. The utility model discloses a conductive medium's configuration optimization, the defect that current conductive medium temperature rise brought is solved and not enough.

Description

A conductive medium and a conductive medium liquid cooling control system

technical field

The utility model belongs to the overheat control technology related to a conductive medium.

Background technique

The consumption of electric vehicles, energy storage modules, energy storage systems and other products is increasing, which makes the consumption of conductive media (high-voltage copper bars, aluminum bars, wires, etc.) The temperature rise of the conductive medium will also increase accordingly, and the temperature rise of the conductive medium will have a great impact on the product. If the problem of the temperature rise of the conductive medium cannot be improved, the following situations will occur (take copper bars as an example, and other conductive mediums are the same):

1. With the improvement of lithium battery product requirements and operating conditions (charge-discharge rate, cycle life, increase in operating environment temperature, etc.), the temperature rise of copper bars is also getting higher and higher. With the increase of copper bar temperature rise, It may lead to safety risks such as insulation failure, system leakage, short-circuit fire, product failure, and personnel electric shock;

2. When the temperature of the copper bar reaches a certain value, the cladding layer of the copper bar will soften and dissolve, resulting in insulation failure and leakage risk;

3. The excessive temperature rise of the copper bar will indirectly lead to the failure of lithium battery products and safety problems;

4. The internal resistance of the copper bar increases as the temperature of the copper bar increases, which will cause power loss and power loss.

At present, the existing copper bars do not directly have their own thermal management system, and they are all thermally managed for other products (such as battery packs), thereby indirectly reducing the temperature of the copper bar, such as air-cooling, liquid cooling, etc. for battery packs. ; In addition, the heat dissipation of the copper bar can be accelerated by increasing the cross-sectional area of the copper bar, but this will cause the volume of the copper bar to increase, the weight will increase, the demand for space utilization will increase, and the energy density of the battery pack will be affected, which will also increase the copper bar. Cost; there is no effective way to directly reduce the temperature rise of copper bars.

Utility model content

The problem to be solved by the utility model: the utility model optimizes the structure of the conductive medium to solve the defects and deficiencies caused by the temperature rise of the existing conductive medium.

For solving the problems referred to above, the scheme that the utility model adopts is as follows:

A conductive medium according to the present invention includes a conductor and a sleeve, the sleeve is set on the conductor, and the two ends of the conductor are respectively exposed outside the sleeve; the sleeve There is a gap between the inside of the body and the conductor as a cooling liquid heat exchange channel; the two ends of the casing are respectively provided with a liquid inlet and a liquid outlet connecting the cooling liquid heat exchange channel.

Further, according to the conductive medium of the present utility model, the sleeve body is a double-layer structure, including an outer sleeve and an inner sleeve; the inner sleeve is located inside the outer sleeve, and both ends are sealed and connected; the inner sleeve is closely attached to the An electrical conductor; the gap is located between the outer and inner sleeves.

Further, according to the conductive medium of the present utility model, the exposed part of the conductor outside the casing is a connecting end; the connecting end is also provided with a connecting hole.

Further, according to the conductive medium of the present invention, the casing is made of high molecular polymer material.

Further, according to the conductive medium of the present invention, the conductor and the inner sleeve are fixed by means of heat-conducting glue or hot-melt welding.

Further, according to the conductive medium of the present invention, an insulating layer is provided on the surface of the conductor.

Further, the conductive medium according to the present invention further includes a temperature sensor; the temperature sensor is connected to the conductor.

Further, according to the conductive medium of the present invention, the sleeve body is further provided with a temperature sensor installation hole; the temperature sensor is arranged in the temperature sensor installation hole and connected to the conductor.

A conductive medium liquid cooling control system according to the present invention includes a temperature controller, a liquid cooling system and the above-mentioned conductive medium, a plurality of temperature sensors are arranged on the sleeve, and the liquid cooling system is connected to the temperature sensor The temperature controller, the liquid cooling system is connected to the cooling liquid heat exchange channel through the liquid inlet and the liquid outlet; the temperature controller is used to judge whether to control the temperature information collected by the temperature sensor The liquid cooling system described above works.

Further, according to the conductive medium liquid cooling control system of the present invention, the liquid cooling system is a battery pack liquid cooling system, and the temperature controller is a vehicle controller or a BMS.

The technical effect of the utility model is as follows:

1. It has the advantages of simple assembly process, reliable technology, uniform cooling and high efficiency;

2. The liquid cooling system is externally connected through the liquid inlet and outlet. The liquid cooling system here can be the liquid cooling system of the battery pack or BDU, so there is no need to establish a dedicated liquid cooling system separately, which reduces the cost and manufacturing difficulty, and is ingenious Borrow the liquid cooling system of the battery pack or BDU;

3. It can quickly and effectively reduce the temperature of the conductive medium body and solve the problem of temperature rise;

4. Real-time detection of the temperature of the conductive medium through the temperature sensor;

5. The raw materials for design and manufacture are simple and abundant, no complicated process is required, no environmental pollution products appear, and the requirements of environmental protection and harmlessness are met.

Description of drawings

Fig. 1 is a three-dimensional structure diagram of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure diagram of another embodiment of the present invention.

Fig. 4 is a schematic diagram of the control system of the embodiment of the utility model.

In the above figures,

1 conductive medium, 11 conductor, 111 connecting end, 1111 connecting hole, 112 insulating layer, 12 casing, 121 inner casing, 122 outer casing, 123 temperature sensor installation hole, 3 clearance, 4 liquid inlet, 5 liquid outlet, 6 liquid cooling system, 61 circulating pump, 62 radiator, 621 inlet, 622 outlet, 7 temperature sensor, 8 temperature controller.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in FIG. 1 and FIG. 2 , a conductive medium, the provided conductive medium 1 includes a long conductor 11 and a long sleeve 12 . The sleeve 12 is sleeved on the conductor 11 , and the two ends of the conductor 11 are respectively exposed outside the sleeve 12 . The part of the conductor 11 exposed outside the casing 12 is the connection end 111 . A connecting hole 1111 is disposed on the connecting end 111 . There is a gap 3 inside the casing 12 as a cooling liquid heat exchange channel. Two ends of the casing 12 are respectively provided with a liquid inlet 4 and a liquid outlet 5 connected to the cooling liquid heat exchange channel. The liquid inlet 4 and the liquid outlet 5 are used to connect the liquid cooling system 6 , so that the liquid cooling system 6 can pump cooling liquid into the gap 3 and take away heat after heat exchange to realize cooling of the conductor 11 .

In this embodiment, the cross-sections of the conductor 11 and the casing 12 are both rectangular. Those skilled in the art understand that the conductor 11 may also be in other shapes, for example, refer to FIG. 3 for example. In the example shown in FIG. 3 , the conductor 11 has a circular cross section, and the corresponding sleeve body 12 has a circular cross section, and the conductor 11 and the sleeve body 12 are arranged coaxially. In this embodiment, the conductor 11 is usually made of copper or aluminum.

Further, the casing 12 may be a double-layer structure, referring to FIG. 2 , including an inner casing 121 and an outer casing 122 . The inner casing 121 is smaller in size than the outer casing 122 , is located inside the outer casing 122 , and is in close contact with the conductor 11 . The gap 3 is located between the outer sleeve 122 and the inner sleeve 121 . Both ends of the inner sleeve 121 and the outer sleeve 122 are sealed and connected, so that both ends of the gap 3 are sealed. The overall body 12 is usually made of high molecular polymer material. The polymer material here is preferably polyamide, polyphthalamide, etc., which have high temperature resistance, wear resistance, high strength, and good flexibility.

In addition, the conductor 11 and the casing 12 are usually fixed by gluing or welding. In the case that the conductive body 11 and the casing body 12 are fixed by an adhesive phase, usually the conductive body 11 and the inner casing 121 are fixed by a thermally conductive adhesive bonding phase. In the case that the conductor 11 and the sleeve 12 are fixed by welding, the welding here generally refers to the fixation between the conductor 11 and the inner sleeve 121 by heat fusion welding.

In addition, in order to prevent the electrical conductor 11 from leaking into the coolant in the coolant heat exchange channel, an insulating layer 112 is provided on the surface of the electrical conductor 11 before the electrical conductor 11 and the casing 12 are fixed. The insulating layer 112 is preferably an insulating coating sprayed on the surface by spraying, which can be made of high-temperature enamel, aluminum oxide and other materials.

In addition, further, a temperature sensor 7 may also be provided on the conductive medium 1 . The temperature sensor 7 is connected to the conductor 11 for detecting the temperature of the conductor 11 . Specifically in this embodiment, the sleeve body 12 is further provided with a temperature sensor installation hole 123 . The temperature sensor 7 is disposed in the temperature sensor installation hole 123 and connected to the conductor 11 .

Fig. 4 illustrates a conductive medium liquid cooling control system, including a temperature controller 8, a liquid cooling system 6 and a conductive medium 1, a number of temperature sensors 7 are arranged on the casing 12, and the liquid cooling system 6 and the temperature sensor 7 are connected to the temperature control system. 8, the liquid cooling system 6 is connected to the coolant heat exchange channel through the liquid inlet 4 and the liquid outlet 5; the temperature sensor 7 is used to collect the temperature of the conductor 11, and feed back the temperature information to the temperature controller 8, the temperature The controller 8 judges whether to control the liquid cooling system 6 to work according to the temperature information. In this embodiment, the liquid cooling system 6 includes at least a circulating pump 61 and a radiator 62 . The radiator 62 is used for heat dissipation of the coolant, and its inlet 621 and outlet 622 are respectively connected to the liquid inlet 4 and the liquid outlet 5 of the casing 12 through pipes. The pipes connected between the radiator 62 and the casing 12 form a closed cooling liquid circulation circuit, and the circulation pump 61 is arranged on the cooling liquid circulation circuit for driving the cooling liquid to flow in the cooling liquid circulation circuit. The temperature controller 8 is used to receive the temperature of the electrical conductor 11 detected by the temperature sensor 7, and judge whether the liquid cooling system 6 needs to be turned on according to the temperature of the electrical conductor 11. When the temperature of the electrical conductor 11 is too high, the circulating pump 61 is turned on. Liquid cooling of the electrical conductor 11 is achieved. There may be multiple temperature sensors 7 connected to the conductor 11 . The conductive medium 1 of this embodiment is usually used in electric vehicles. The liquid cooling system 6 is an external module, which may be the liquid cooling system of the battery pack, or the liquid cooling system of the whole vehicle, preferably the liquid cooling system of the battery pack. In addition, the liquid cooling system 6 and the temperature sensor 7 need to control the temperature of the conductive medium 1 through the temperature controller 8 . The temperature controller 8 can be the BMS module itself or the controller of the whole vehicle.

Claims (10)

1. A conductive medium, characterized in that it comprises a conductor and a sleeve, the sleeve is placed on the conductor, and the two ends of the conductor are respectively exposed outside the sleeve; the There is a gap between the inside of the sleeve and the conductor as a cooling liquid heat exchange channel; the two ends of the sleeve are respectively provided with a liquid inlet and a liquid outlet connected to the cooling liquid heat exchange channel. 2. The conductive medium according to claim 1, wherein the sleeve body is a double-layer structure, including an outer sleeve and an inner sleeve; the inner sleeve is located inside the outer sleeve, and the two ends are sealed and connected; The inner sleeve is close to the conductor; the gap is located between the outer sleeve and the inner sleeve. 3. The conductive medium according to claim 1 or 2, characterized in that, the conductor exposed outside the sleeve is a connecting end; the connecting end is also provided with a connecting hole. 4. The conductive medium according to claim 1 or 2, characterized in that, the casing is made of high molecular polymer material. 5 . The conductive medium according to claim 2 , wherein the conductive body and the inner sleeve are fixed by means of heat-conducting glue or hot-melt welding. 6 . 6. The conductive medium according to claim 1 or 2, characterized in that an insulating layer is provided on the surface of the conductor. 7. The conductive medium according to claim 1 or 2, further comprising a temperature sensor; the temperature sensor is connected to the conductor. 8. The conductive medium according to claim 1 or 2, wherein a temperature sensor mounting hole is also provided on the sleeve; the temperature sensor is arranged in the temperature sensor mounting hole and connected to the conductive medium. body. 9. A conductive medium liquid cooling control system, characterized in that it includes a temperature controller, a liquid cooling system, and the conductive medium according to any one of claims 1 to 8, the casing is provided with several temperature sensors, the The liquid cooling system and the temperature sensor are connected to the temperature controller, and the liquid cooling system is connected to the cooling liquid heat exchange channel through the liquid inlet and the liquid outlet; the temperature controller is used to The temperature information collected by the sensor determines whether to control the operation of the liquid cooling system. 10. The conductive medium liquid cooling control system according to claim 9, wherein the liquid cooling system is a liquid cooling system of a battery pack, and the temperature controller is a vehicle controller or a BMS.

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