阅读说明：本技术 一种带自加热的换热板 (Heat exchange plate with self-heating function ) 是由 张书明 李晓冬 毛永志 王瑞军 于 2018-07-27 设计创作，主要内容包括：本发明公开了一种带自加热的换热板,其应用于锂电池模组,所述换热板包括金属主体和表面加热片,所述金属主体设置有内部均匀分布的流道,外部有进出水口。所述加热片为一种薄形面状发热体,有良好的热传导性,表面质软且具有较高的绝缘性,其复合于金属主体的一表面。金属主体的另一表面粘贴导热硅胶片材,增大其换热效率。完成上述工艺后,将整体均压在电池模块发热量较大的极耳处,最终在以换热板为基材的前提下,实现了加热和冷却电池的双向功能。(The invention discloses a self-heating heat exchange plate which is applied to a lithium battery module. The heating sheet is a thin planar heating body, has good heat conductivity, soft surface quality and high insulativity, and is compounded on one surface of the metal main body. And a heat-conducting silica gel sheet is pasted on the other surface of the metal main body, so that the heat exchange efficiency of the metal main body is improved. After the process is completed, the whole battery module is uniformly pressed at the lug with larger heat productivity, and finally the bidirectional function of heating and cooling the battery is realized on the premise of taking the heat exchange plate as the base material.)

1. The utility model provides a take heat transfer board of self-heating, it is applied to lithium battery module, the heat transfer board includes metal main part, heating plate and heat conduction silica gel, its characterized in that: the metal main body is internally provided with evenly distributed runners, and the outside of the metal main body is provided with a water inlet and a water outlet; the heating sheet is a thin planar heating body, has good heat conductivity, soft surface quality and high insulativity, and is compounded on one surface of the metal main body; the heat-conducting silica gel is adhered to the other surface of the metal main body so as to increase the heat exchange efficiency; the heat exchange plates are wholly and uniformly distributed at the lug of the battery module with larger heat productivity, and the direct heating and refrigeration of the battery core can be realized.

2. A heat exchanger plate according to claim 1, wherein the metal body is made of an aluminum alloy, has a thickness of 8 to 20mm, a width of 80 to 150mm, a wall thickness of 0.5 to 4mm, and a length adapted to a lithium battery module.

3. A heat exchange plate according to claim 1 or 2, wherein the flow channel cavities are uniformly distributed inside the metal main body and used for cooling liquid circulation, and the number and the size of the flow channel cavities are matched with the length and the width of the heat exchange plate; the water inlet and the water outlet have the diameter of

4. The heat exchange plate as claimed in claim 1, wherein the heating sheet is a thin planar heating body compounded on the surface of the metal plate, the surface is soft and has high heat conductivity, a heating resistance wire wound in a bending way is arranged in the heating sheet, and the whole thickness of the heating sheet is 0.5-0.7 mm.

5. A heat exchange plate according to claims 1 to 4, wherein the surface material of the heating plate is selected from any one of silicone, polyimide film or similar organic materials; the working voltage of the heating sheet is DC 150V-220V, and the heating power is adaptively set according to the required heating module and the thermal management strategy.

6. The heat exchange plate according to any one of claims 1 to 4, wherein the length of the leading-out wire of the heating fin sealing head and the type of the leading-out connector are adaptively set according to the actual application environment.

7. A method of manufacturing a heat exchanger plate with self-heating according to claims 1-6, characterized in that: the preparation method comprises the following steps:

step (1): manufacturing a metal main body: selecting a metal main body as an aluminum alloy material, wherein the metal main body is a metal plate with flow channel cavities uniformly distributed in the metal main body, and a water inlet and a water outlet are formed in the outer part of the metal main body;

step (2): manufacturing a heating sheet: the heating sheet consists of an outer-layer film and an inner heating resistance wire, the inner part of the heating sheet is provided with a bent and wound heating resistance wire, the outer part of the heating sheet is provided with a leading-out wire connected with a power supply, the inner resistance wire and the outer-layer film are tightly attached through a vulcanization process, wherein in the process, the vulcanization temperature is 170-190 ℃, the vulcanization pressure is 5-8MPa, and the vulcanization time is 4-6h, the outer-layer film is made of any one of silicon rubber, polyimide film or organic materials similar to the silicon rubber, the polyimide film or the organic materials similar to the polyimide film, and the inner heating resistance wire can be any one of iron-chromium;

and (3): compounding a heating sheet and a metal plate: compounding a heating sheet and a metal plate by adopting a vulcanization process, and controlling the vulcanization temperature, the vulcanization pressure and the vulcanization time when the heating sheet and the metal plate are vulcanized, so as to compound the heating sheet and the metal plate;

and (4): compounding a heat-conducting silica gel sheet and a metal plate: and (4) compounding a heat-conducting silica gel sheet on one surface of the metal plate which is not compounded with the heating sheet after the step (3) to obtain the self-heating heat exchange plate.

8. The method of manufacturing according to claim 7, further characterized by: the metal main part is the aluminum alloy material, and thickness is 8-20mm, and the width is 80-150mm, and 0.5-4mm of wall thickness, length set up according to lithium battery module adaptation.

9. The method of manufacturing according to claim 7, further characterized by: the vulcanization temperature in the step (3) is 170-190 ℃, the vulcanization pressure is 5-8MPa, and the vulcanization time is 4-6 h.

Technical Field

The invention belongs to the technical field of automobile parts, particularly relates to a heat exchange plate with self-heating, and particularly relates to a heat exchange plate structure of a novel lithium ion soft package battery.

Background

The lithium ion power battery is widely applied to the field of new energy pure electric vehicles and hybrid new energy vehicles. At present, in the use process of a user, the battery inevitably meets severe cold weather and even works for a long time under an extremely cold temperature condition, the ambient temperature of the battery is low, and the battery has great influence on the service life, the charge and discharge capacity and the activity of positive and negative ions in the battery core. Therefore, how to quickly and effectively heat the battery to a temperature level at which the battery can normally work in the actual environment use process of the battery is a key problem of the technical research.

Disclosure of Invention

The invention aims to solve the problems that a lithium battery is difficult to heat and the temperature rise rate of the battery is low in the prior art, greatly improves the capacity of adapting to a low-temperature cold environment of the battery, and realizes the bidirectional functions of heating and cooling the battery by inventing and modifying the same part.

The invention also aims to provide a preparation method of the heat exchange plate special for the lug of the automobile battery, the preparation method can be used for preparing an ultrathin heating sheet so as to prepare the heat exchange plate with the bidirectional functions of heating and cooling the battery, so that the heating requirement of a battery cell in a cold environment can be met after a battery pack module is assembled, and the related problem of rapid temperature rise of the battery can be solved.

The invention provides a heat exchange plate with self-heating, which is applied to a lithium battery module, and comprises a metal main body, a heating sheet and heat-conducting silica gel, and is characterized in that: the metal main body is internally provided with evenly distributed runners, and the outside of the metal main body is provided with a water inlet and a water outlet; the heating sheet is a thin planar heating body, has good heat conductivity, soft surface quality and high insulativity, and is compounded on one surface of the metal main body; the heat-conducting silica gel is adhered to the other surface of the metal main body so as to increase the heat exchange efficiency; the heat exchange plates are wholly and uniformly distributed at the lug of the battery module with larger heat productivity, and the direct heating and refrigeration of the battery core can be realized.

Optionally, the metal main body is made of an aluminum alloy material, the thickness is 8-20mm, the width is 80-150mm, the wall thickness is 0.5-4mm, and the length is set according to the lithium battery module.

Optionally, the runner cavities are uniformly distributed inside the metal main body and used for cooling liquid circulation, quantity and rulerThe size is matched with the length and the width of the heat exchange plate. The water inlet and the water outlet have the diameter of

The angle is matched with the module for heat exchange.

Optionally, the heating sheet is a thin planar heating body compounded on the surface of the metal plate, the surface is soft and has high thermal conductivity, and a heating resistance wire wound in a bending mode is arranged inside the heating sheet. By controlling the vulcanizing temperature, pressure and vulcanizing time when the heating sheet and the metal plate are vulcanized, the whole thickness of the heating sheet can be as thin as 0.5-0.7 mm. Preferably, the vulcanization temperature is 170-190 ℃, more preferably 170-180 ℃, the vulcanization pressure is set at 5-8MPa, and the vulcanization time is optimally controlled at 4-6 h.

Optionally, the surface material of the heating plate may be selected from silicone rubber, polyimide film or similar organic materials. The working voltage of the heating sheet is DC 150V-220V, and the heating power is adaptively set according to the required heating module and the thermal management strategy.

Optionally, the length of the heating sheet end socket lead-out wire and the type of the lead-out connector are adaptively set according to the actual application environment.

The invention provides a preparation method of a heat exchange plate with self-heating, which comprises the following steps:

step (1): manufacturing a metal main body: selecting a metal main body as an aluminum alloy material, wherein the metal main body is a metal plate with flow channel cavities uniformly distributed in the metal main body, and a water inlet and a water outlet are formed in the outer part of the metal main body;

step (2): manufacturing a heating sheet: the heating sheet consists of an outer-layer film and an inner heating resistance wire, the inner part of the heating sheet is provided with a bent and wound heating resistance wire, the outer part of the heating sheet is provided with a leading-out wire connected with a power supply, the inner resistance wire and the outer-layer film are tightly attached through a vulcanization process, wherein in the process, the vulcanization temperature is 170-190 ℃, the vulcanization pressure is 5-8MPa, and the vulcanization time is 4-6h, the outer-layer film is made of any one of silicon rubber, polyimide film or organic materials similar to the silicon rubber, the polyimide film or the organic materials similar to the polyimide film, and the inner heating resistance wire can be any one of iron-chromium;

and (3): compounding a heating sheet and a metal plate: compounding a heating sheet and a metal plate by adopting a vulcanization process, and controlling the vulcanization temperature, the vulcanization pressure and the vulcanization time when the heating sheet and the metal plate 2 are vulcanized, so as to compound the heating sheet and the metal plate;

and (4): compounding a heat-conducting silica gel sheet and a metal plate 2: and (3) compounding a heat-conducting silica gel sheet on one surface of the metal plate 2 which is not compounded with the heating sheet after the step (3), wherein the specific process is a vulcanization process, and the self-heating heat exchange plate is prepared.

Preferably, the vulcanization temperature in the step (3) is 170-190 ℃, more preferably 170-180 ℃, the vulcanization pressure is set at 5-8MPa, and the vulcanization time is optimally controlled at 4-6 h.

Compared with the prior art, the heat exchange plate with the self-heating function has the following advantages:

(1) the space of the module is fully utilized, and the process of the heating plate composite heat exchange plate is creatively introduced through the reasonable design of the structure, so that the effective control of the battery heating is realized; the heating sheet is a thin planar heating body, the power is adjustable, and the input voltage is common and easy to obtain. The heat transfer board is the main part and is the metal section bar, can select the higher aluminium matter section bar of heat conduction efficiency, and then can effectual perpendicular conduction heating plate produced heat, realizes the direct heat transfer to whole battery module.

(2) Utilize the heating plate, the heating resistor silk, the heat transfer board, the heating function that fails to realize among the prior art can be realized to the lead-out wire, the effectual heating of having solved the outside heat source of battery, make its rapid heating up's problem, and the heating plate comprises outer tectorial membrane and inside heating resistor silk, inside resistance silk is closely laminated with outer tectorial membrane, improve space utilization, the ultra-thin heating plate of preparation (0.5-1mm thick) can improve space utilization, save more spaces for other metalworks, reach higher energy density, bulk density. The heating power of the heating plate can be 0.5-1W/mm²(ii) a The insulating property is within 10s, and the leakage current is not more than 5mA at the voltage of 2500V. After the heating plate and the metal main body are vulcanized, the heating plate has stronger stripping force, and the heating plate is ensuredThe compound is firm and does not fall off. According to the self requirement, the length of the lead-out wire and the type of the lead-out terminal can be matched with the actual type. And on the premise of using the heat exchange plate as a base material, the bidirectional functions of heating and cooling the battery are realized.

(3) This whole is arranged in utmost point ear department that the electricity core was concentrated and is generated heat, and when the battery was in low temperature environment, the heating plate started, and the heat is through the heating plate, and the heat transfer silica gel piece transmits to electric core to the realization is to the direct heat transfer of battery module. When the temperature of the battery is too high, the heating is stopped, and the internal flow channel of the heat exchange plate circulates the cooling liquid to take away the heat generated by the battery module.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a heat exchange plate with self-heating according to the present invention;

FIG. 2 is a longitudinal sectional view of FIG. 1;

FIG. 3 is an internal structural view of a heat patch;

fig. 4 is a position diagram of a heat exchange plate with self-heating in a battery pack.

The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:

1-heating plate; 2-a metal body; 3-leading-out wire; 4-water inlet and outlet; 5-internal water channels; 6-heating resistance wires; 7-heating the outer film of the sheet; 8-a battery module; 9-heat conducting silica gel sheet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

According to embodiment 1 of the present invention, as shown in fig. 1 to 4, there is provided a heat exchange plate with self-heating, the heat exchange plate comprising a heating plate 1, a metal body 2 and a heat-conducting silica gel sheet 9, wherein: the metal main body 2 is internally provided with evenly distributed runners 5, and the outside of the metal main body is provided with a water inlet and a water outlet 4; the heating sheet 1 is a thin planar heating element, has good heat conductivity, soft surface quality and high insulativity, and is compounded on one surface of the metal main body; the heat-conducting silica gel sheet 9 is adhered to the other surface of the metal main body so as to increase the heat exchange efficiency; the heat exchange plates are wholly and uniformly distributed at the lug of the battery module 8 with large heat productivity, and direct heating and refrigeration of the battery core can be realized.

The preparation method of the heat exchange plate with the self-heating function comprises the following steps:

step (1): manufacturing a metal main body 2: selecting a metal main body 2 as an aluminum alloy material, wherein the metal main body 2 is 8-20mm in thickness, 80-150mm in width, 0.5-4mm in wall thickness and adaptive to a lithium battery module in length, the metal main body 2 is a metal plate with flow channel cavities 5 uniformly distributed in the metal main body, the number and the size of the metal main body are adaptive to the length and the width of a heat exchange plate, a water inlet and a water outlet 4 are arranged outside the metal main body 2, and the diameter of the metal main body is

The angle is matched with the module needing heat exchange;

step (2): manufacturing a heating sheet 1: the heating plate 1 is composed of an outer-layer film 7 and an inner heating resistance wire 6, the inner part of the heating plate is provided with the heating resistance wire 6 which is bent and wound, the outer part of the heating plate 1 is provided with a leading-out wire 3 which is connected with a power supply, the inner resistance wire 6 is tightly attached to the outer-layer film 7 through vulcanization, the vulcanization temperature in the process is 170-190 ℃, the vulcanization pressure is 5-8MPa, and the vulcanization time is 4-6h, the outer-layer film 7 is made of any one of a silica gel material, a polyimide film or an organic material similar to the silica gel material, and the inner heating resistance wire 6 can be any one of iron-chromium-nickel alloy or copper;

and (3): composite heating sheet 1 and metal plate 2: compounding a heating sheet 1 and a metal plate 2 by adopting a vulcanization process, controlling the vulcanization temperature of the heating sheet and the metal plate 2 during vulcanization to be 170-180 ℃, the pressure to be 5-8MPa, and the vulcanization time to be 4-6h, so that the integral thickness of the heating sheet is 0.5-0.7 mm;

and (4): compounding a heat-conducting silica gel sheet and a metal plate 2: and (3) compounding a heat-conducting silica gel sheet on one surface of the metal plate 2 which is not compounded with the heating sheet after the step (3), wherein the specific process is a vulcanization process, and the self-heating heat exchange plate is prepared.

And (3) testing an experimental effect:

(1) the heating power of the heating sheet of the heat exchange plate prepared by the process can be 0.5-1W/mm²(ii) a The insulating property is within 10s, and the leakage current is not more than 5mA at the voltage of 2500V;

(2) taking a battery system formed by 144 soft package battery monomers as an example, the self-heating heat exchange plate with self-heating is subjected to a self-heating test in an environment of-20 ℃, the integral piece is arranged at a tab with a concentrated heating function of a battery core, and the temperature rise efficiency can reach 0.7 ℃/min and the temperature difference of the monomers is less than or equal to 3 ℃ through laboratory measurement.

In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.