Heating and cooling system integrated structure and battery thermal management system

Abstract

The utility model relates to the technical field of power batteries, and discloses a heating and cooling system integrated structure and a battery thermal management system, the heating and cooling system integrated structure comprises a refrigeration base material, a first insulating film, a heating core body and a second insulating film, the first insulating film is attached to the refrigeration base material, the heating core body is attached to the first insulating film, and the second insulating film covers the heating core body. As only one layer of insulating film is arranged between the heating core body and the refrigeration base material, compared with the prior art, the heat transfer medium between the heating core body and the refrigeration base material is less, and the heat transfer efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field especially, and it relates to a kind of heating cooling system integrated structure and the battery thermal management system comprising the heating cooling system integrated structure of this. BACKGROUND

[0002] At present, pure electric and oil-electric hybrid power car appear more and more in our life, and most of the existing and future pure electric and oil-electric hybrid power car uses lithium ion power battery as power source, and the performance, reliability and life of lithium ion battery under high and low temperature decrease greatly compared with normal temperature. When using battery module in low temperature environment, heating system must be used to heat the battery module, so that the battery core reaches the appropriate temperature and starts charging and discharging work. The power battery is very sensitive to temperature, and when the temperature is too high, it is easy to cause poor consistency of battery pack module, shorten the life, and the life of motor and electric control will also be affected, and even more, it is easy to cause battery thermal runaway, so that the battery explodes. Therefore, it is necessary to combine the heating system and the liquid cooling system to manage the battery.

[0003] In the prior art, the heating film is mainly fixed on the surface of the battery core through heat-conducting glue or fasteners, and is fixed on the surface of the liquid cooling system by pasting or hot-pressing method. Before the heating film is fixed on the liquid cooling system, the surface of the liquid cooling system needs to be insulated, which results in multiple insulating layers or glue between the liquid cooling system and the heating film. This bonding method has high cost and more heat transfer medium, which reduces the heat transfer efficiency. UTILITY MODEL CONTENT

[0004] The purpose of the embodiment of the utility model is to provide a heating cooling system integrated structure and a battery thermal management system, which has high heat transfer efficiency.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] On the one hand, a heating cooling system integrated structure is provided, which comprises a refrigeration base material, a first insulating film, a heating core and a second insulating film. The first insulating film is attached to the refrigeration base material, the heating core is attached to the first insulating film, and the second insulating film covers the heating core.

[0007] As a further scheme of the heating cooling system integrated structure, the first insulating film is partially exposed to the heating core, and the second insulating film covers the heating core and the first insulating film exposed to the heating core.

[0008] As a further scheme of the heating cooling system integrated structure, the heating core is a patterned conductive circuit.

[0009] As a further scheme of the heating-cooling system integrated structure, the heating core is a patterned metal line.

[0010] As a further scheme of the heating-cooling system integrated structure, the heating core is a patterned metal graphite composite line.

[0011] As a further scheme of the heating-cooling system integrated structure, the heating core is a patterned graphite line.

[0012] As a further scheme of the heating-cooling system integrated structure, the first insulating film and the second insulating film are both PI films.

[0013] As a further scheme of the heating-cooling system integrated structure, the refrigeration base has a channel for refrigerant flow.

[0014] As a further scheme of the heating-cooling system integrated structure, the refrigeration base is selected from any one of a liquid cooling plate, a direct cooling plate, a liquid cooling tube, a direct cooling tube and a refrigerant tube.

[0015] In another aspect, a battery thermal management system is provided, comprising a battery module and the heating-cooling system integrated structure, and the second insulating film is attached to the battery module.

[0016] Advantages:

[0017] Compared with the prior art, the heating core and the refrigeration base have less heat transfer medium and high heat transfer efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described in detail below according to the drawings and examples.

[0019] Figure 1 It is the sectional view schematic drawing that the first insulating film described in the utility model embodiment is attached to the refrigeration base;

[0020] Figure 2 It is the sectional view schematic drawing that the heating core described in the utility model embodiment is attached to the first insulating film;

[0021] Figure 3 It is the sectional view schematic drawing of the heating-cooling system integrated structure described in the utility model embodiment.

[0022] Figures 1 to 3 In the middle:

[0023] 1, refrigeration base;2, first insulating film;3, heating core;4, second insulating film. DETAILED DESCRIPTION

[0024] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model embodiment will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] In the utility model, unless explicitly defined and limited, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] In the description of the embodiment, if the terms "up", "down", "left", "right" and other orientation or position relationship appear, they are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second" and the like appear, they are only used to distinguish in description, and have no special meaning.

[0028] The embodiment provides a heating and cooling system integration method, comprising the following steps:

[0029] S10, providing a refrigeration substrate 1 and a solution for preparing an insulating film, coating the solution on the surface of the refrigeration substrate 1, and attaching the solution on the refrigeration substrate 1 to form a first insulating film 2 after solidification, as shown in Figure 1 ;

[0030] S20, providing a heating core 3, and attaching the heating core 3 to the first insulating film 2, as shown in Figure 2 ;

[0031] S30, coating a solution on the surface of the heating core 3 and the first insulating film 2 exposed to the heating core 3, and after solidification, the solution is attached to the surface of the heating core 3 and the first insulating film 2 to form a second insulating film 4, thereby obtaining a heating and cooling system integrated structure as shown in Figure 3 .

[0032] In the conventional preparation method, a temporary carrier plate is first provided, and after coating a solution on the carrier plate and solidification, the heating core is encapsulated on the carrier plate through the second insulating film, and then the carrier plate is removed. The heating core encapsulation structure after the carrier plate is removed is fixed on the refrigeration substrate with an insulating layer sprayed on the surface by an adhesive. The process is complicated, and there are multiple layers of insulating materials and structural adhesives between the heating core encapsulation structure and the refrigeration substrate, and there are many heat transfer mediums between the refrigeration substrate and the heating core, which results in low heat transfer efficiency. In the present embodiment, the refrigeration substrate 1 is directly used as a carrier plate, and the first insulating film 2 is directly prepared on the refrigeration substrate 1, and the heating core 3 is fixed on the refrigeration substrate 1 through the second insulating film 4. Compared with the prior art, the first insulating film 2 is directly formed on the refrigeration substrate 1 in the present embodiment, and the step of removing the carrier plate is omitted, and the refrigeration substrate 1 does not need to be insulated separately, and the first insulating film 2 and the refrigeration substrate 1 do not need to be pasted with glue, so the process is simple and the production efficiency is high. In the prepared heating and cooling system integrated structure, there is only one layer of insulating film between the refrigeration substrate 1 and the heating core 3, and there are few heat transfer mediums, which effectively improves the heat transfer efficiency between the refrigeration substrate 1 and the heating core 3. The heating and cooling system integrated structure of the present embodiment can be applied to a battery thermal management system, which can quickly regulate the temperature of the battery and improve the efficiency of the battery thermal management.

[0033] Further, the step S20 specifically comprises: providing a core plate capable of being heated after being conductive, attaching the core plate to the first insulating film 2, and performing etching treatment on the core plate to form a patterned conductive circuit, i.e., the heating core 3.

[0034] The core plate can be a metal plate, a graphite plate, or a composite plate of metal and graphite, and the metal can be silver, copper, or an alloy thereof.

[0035] The solution in steps S10 and S30 is dried and solidified to form an insulating film, which is a PI film (Polyimide Film) with good heat conduction effect, so the insulating film is also called a heating film. The composition of the PI film solution is a conventional technology in the field, and will not be described in detail.

[0036] As shown in Figure 3As shown, the heating and cooling system integrated structure of the embodiment includes a refrigeration base 1, a first insulating film 2, a heating core 3 and a second insulating film 4, the first insulating film 2 is attached to the refrigeration base 1, the heating core 3 is attached to the first insulating film 2, and the second insulating film 4 covers the heating core 3.

[0037] In the embodiment, the refrigeration base 1 is used as a cooling system to reduce the temperature of the battery with a high temperature. Compared with the prior art, the heating core 3 and the refrigeration base 1 are only separated by one layer of insulating film, so that the heat transfer medium between the heating core 3 and the refrigeration base 1 is less, and the heat transfer efficiency is high.

[0038] Further, the first insulating film 2 is partially exposed to the heating core 3, and the second insulating film 4 covers the heating core 3 and the first insulating film 2 exposed to the heating core 3. By wrapping the heating core 3 on the first insulating film 2 with the second insulating film 4, a good sealing effect can be achieved on the heating core 3, effectively isolating the heating core 3 from the refrigeration base 1.

[0039] Further, the heating core 3 is a patterned conductive line. After the conductive line is conductive, it has a heating effect on the battery.

[0040] Alternatively, the heating core 3 is selected from any one of a patterned metal line, a graphite line, or a metal-graphite composite line, and after the electrical conduction, all of them have a good heating effect.

[0041] In the embodiment, the first insulating film 2 and the second insulating film 4 are both PI films. After the corresponding PI film solution is coated on the refrigeration base 1 and then dried and cured, the first insulating film 2 can be stably attached to the refrigeration base 1; the heating core 3 is attached to the first insulating film 2, and the PI film solution is coated on the surface of the heating core 3 and the first insulating film 2, and then dried and cured, so that the second insulating film 4 is formed on the surface of the heating core 3 and the exposed surface of the first insulating film 2, thereby fixing the heating core 3 on the refrigeration base 1.

[0042] Further, the refrigeration base 1 has a channel for the circulation of refrigerant, and the refrigeration base 1 and the heating core 3 can exchange heat to regulate the temperature of the battery by introducing the refrigerant into the channel.

[0043] Alternatively, the refrigeration base 1 is selected from any one of a liquid cooling plate, a direct cooling plate, a liquid cooling tube, a direct cooling tube, and a refrigerant tube, and any structure with a refrigeration effect is applicable.

[0044] The embodiment also provides a battery thermal management system, which includes a battery and the heating and cooling system integrated structure of any one of the above embodiments, and the second insulating film 4 of the heating and cooling system integrated structure is attached to the battery.

[0045] In the embodiment, the heat transfer medium between the refrigeration base material 1 and the heating core 3 is only the first insulating film 2, and the heat transfer medium is less, so that the heat control efficiency of the battery can be effectively improved.

[0046] Specifically, the second insulating film 4 is fixedly attached to the battery by an adhesive.

[0047] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heating and cooling system integrated structure, characterized by, The heating and cooling system integrated structure comprises a refrigeration base, a first insulating film, a heating core and a second insulating film, the first insulating film is attached to the refrigeration base, the heating core is attached to the first insulating film, and the second insulating film covers the heating core.

2. The heating and cooling system integration structure according to claim 1, wherein The first insulating film is partially exposed to the heating core, and the second insulating film covers the heating core and the first insulating film exposed to the heating core.

3. The heating and cooling system integrated structure according to claim 1, wherein The heating core is a patterned conductive line.

4. The heating and cooling system integrated structure according to claim 1, wherein The heating core is a patterned metal line.

5. The heating and cooling system integrated structure according to claim 1, wherein The heating core is a patterned metal-graphite composite line.

6. The heating and cooling system integrated structure according to claim 1, wherein The heating core is a patterned graphite line.

7. The heating and cooling system integrated structure according to claim 1, wherein The first insulating film and the second insulating film are both PI films.

8. The heating and cooling system integrated structure according to any one of claims 1 to 7, characterized by, The refrigeration base has a channel for refrigerant flow.

9. The heating and cooling system integrated structure according to any one of claims 1 to 7, characterized by, The refrigeration base is selected from any one of a liquid cooling plate, a direct cooling plate, a liquid cooling tube, a direct cooling tube and a refrigerant tube.

10. A battery thermal management system, characterized by, The heating and cooling system integrated structure further comprises a battery module, and the second insulating film is attached to the battery module.

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