CN214013026U - Power battery heating film, power battery temperature control system and power battery system - Google Patents
Power battery heating film, power battery temperature control system and power battery system Download PDFInfo
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- CN214013026U CN214013026U CN202023144020.6U CN202023144020U CN214013026U CN 214013026 U CN214013026 U CN 214013026U CN 202023144020 U CN202023144020 U CN 202023144020U CN 214013026 U CN214013026 U CN 214013026U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a power battery heating film belongs to power battery technical field, it is a plurality of including a plurality of electric heating structure that connect in parallel each other and parcel the insulating parcel layer of electric heating structure, every the both ends of electric heating structure all be connected with stretch out in the wire of drawing forth in the insulating parcel layer outside. This power battery heating film realizes the stepping of heating power and refines through a plurality of parallelly connected electric heating structure, during the use, can select the electric heating structure of different stepping power to preheat the battery according to the real-time temperature of battery and the difference of setting for the temperature to realize heating power's regulation, avoid the battery to appear the overheated or not enough condition of heating, both guaranteed the safety of battery, avoid the waste of energy again. The utility model also discloses a power battery temperature control system and a power battery system.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a power battery adds hotting mask, power battery temperature control system and power battery system.
Background
With the enhancement of environmental awareness and the popularization of electric vehicles, the output of power batteries, especially lithium ion power batteries, is increasing day by day. As is well known, since a lithium ion battery is sensitive to a working temperature, it is important to design a reasonable and efficient temperature control system in a power battery pack.
In the prior art, the heating modes of a power battery temperature control system mainly include three modes, namely heating film heating, PTC heating and liquid heating. The heating film heating mode is a main heating mode of the power battery due to the advantages of low cost, easiness in installation, easiness in control and the like. In the prior art, the heating film is formed by connecting a single resistance wire or a plurality of resistance wires in series, so that constant heating power can be obtained.
The heating power of the existing electric heating film is constant, the dry burning temperature can reach 60-130 ℃ according to different resistance wires, but the electric heating film with the same specification is difficult to adapt to the complex temperature environment of the electric automobile and the harsh requirements of a battery pack on the working temperature. Because the optimum working temperature of the lithium ion battery is 20-30 ℃, the heating film starts to work when the temperature of the battery is slightly lower than the set temperature, and because the power of the heating film is constant, the initial heating rate is high, and the working temperature of the battery pack is extremely easy to quickly rise to the set upper limit, the heating mode can cause the waste of the energy of the battery pack, on one hand, the battery pack cooling or heat dissipation system is needed to assist in temperature control, and in addition, the cycle life of the battery at a higher temperature can be sharply shortened, and the thermal safety problem can also occur.
Therefore, how to adjust the heating power of the electric heating film to achieve the safe and energy-saving heating goal is a technical problem that needs to be solved by those skilled in the art at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a power battery heating film for realize becoming more meticulous the heating under the different temperature condition to the battery, guarantee battery safety, reduce the waste of energy. Another object of the utility model is to provide a power battery temperature control system and power battery system including above-mentioned power battery heating film.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a power battery heating film, includes that a plurality of electric heating structure that connect in parallel each other and parcel are a plurality of electric heating structure's insulating parcel layer, every electric heating structure's both ends all are connected with stretch out in the wire of drawing forth in the insulating parcel layer outside.
Preferably, the electric heating structure is a strip-shaped electric heating structure bent into a ring shape.
Preferably, a plurality of annular electric heating structures are nested in sequence from inside to outside.
Preferably, the heating power of each of the electric heating structures from inside to outside is sequentially increased.
Preferably, the annular strip-shaped electric heating structure comprises a plurality of bending sections, and two ends of the strip-shaped electric heating structure extend out of the same side of the insulating wrapping layer.
Preferably, the electric heating structure is a flexible electric heating wire.
Preferably, the electrical heating structure is a metal resistance wire.
The utility model provides a power battery heating film, it is a plurality of including a plurality of parallelly connected electrical heating structure and parcel each other electrical heating structure's insulating parcel layer, every electrical heating structure's both ends all be connected with stretch out in the wire of drawing forth in the insulating parcel layer outside. This power battery heating film realizes the stepping of heating power and refines through a plurality of parallelly connected electric heating structure, during the use, can select the electric heating structure of different stepping power to preheat the battery according to the real-time temperature of battery and the difference of setting for the temperature to realize heating power's regulation, avoid the battery to appear the overheated or not enough condition of heating, both guaranteed the safety of battery, avoid the waste of energy again.
The utility model also provides a power battery temperature control system, include as above arbitrary power battery heating film. The derivation process of the beneficial effects generated by the power battery temperature control system is substantially similar to the derivation process of the beneficial effects brought by the power battery heating film, and therefore, the description is omitted here.
Preferably, the power battery temperature control system further comprises a temperature detection device for detecting the temperature difference between the inside and the outside of the battery.
The utility model also provides a power battery system, including battery and as above arbitrary power battery heating film or as above arbitrary power battery temperature control system, the derivation process of the beneficial effect that this power battery system produced is similar roughly with the derivation process of the beneficial effect that above-mentioned power battery heating film brought, and the event is no longer repeated here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power battery heating film according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another power battery heating film according to an embodiment of the present invention;
fig. 3 is a working schematic diagram of a power battery temperature control system in an embodiment of the present invention;
fig. 4 is a flow chart of a temperature control process of the power battery according to an embodiment of the present invention.
The meaning of the various reference numerals in figures 1 to 4 is as follows:
1-strip electric heating structure, 2-insulating wrapping layer, 3-leading-out lead, 4-battery module, 11-inner ring electric heating structure, 12-middle ring electric heating structure, 13-outer ring electric heating structure, 100-heating film, 200-battery, 300-BMS, 400-temperature sensor and 500-actuator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides a power battery heating film, which includes a plurality of electric heating structures connected in parallel and an insulating wrapping layer 2 wrapping the plurality of electric heating structures, wherein both ends of each electric heating structure are connected with lead-out wires 3 extending out of the insulating wrapping layer 2. Specifically, insulating parcel layer 2 plays protection electrical heating structure and insulating effect, and insulating parcel layer 2 wraps up whole electrical heating structure to form a flaky heating film structure. The power battery heating film can be connected with a connector outside the leading-out wire 3, so that the power battery heating film can be conveniently and electrically connected with an actuator 500 for controlling the on-off of the heating film. This power battery heating film realizes the stepping of heating power and refines through a plurality of parallelly connected electric heating structure, during the use, can select the electric heating structure of different stepping power to preheat the battery according to the real-time temperature of battery and the difference of setting for the temperature to realize heating power's regulation, avoid the battery to appear the overheated or not enough condition of heating, both guaranteed the safety of battery, avoid the waste of energy again.
The step power in the scheme specifically means that the total power of the heating film of the power battery is divided into a plurality of power according to the number and the size of the electric heating structures, so that the actual heating power is adjusted according to the scene requirements.
It should be noted that the electric heating structure in this embodiment may be designed in various forms, for example, as a strip-shaped structure, a sheet-shaped structure, or a ring-shaped structure, and preferably, the electric heating structure in this embodiment is the strip-shaped electric heating structure 1 bent into a ring shape. Specifically, the strip-shaped electric heating structures 1 may be bent into a circular ring shape, a square ring shape, or other irregular ring shapes, for example, in the power battery heating film shown in fig. 1, each strip-shaped electric heating structure 1 is bent into a ring shape that is similar to a rectangular frame shape as a whole.
Specifically, the plurality of annular electric heating structures may be arranged in a dispersed manner, may be arranged in a nested manner in sequence, may be arranged in an overlapping manner, and the like, and may be arranged in a combined manner of any of the above manners. Preferably, as shown in fig. 1, a plurality of annular strip-shaped electric heating structures 1 in the present scheme are sequentially nested from inside to outside. A to f in fig. 1 represent pins of the connector respectively, and the two ends of the outermost strip-shaped electric heating structure 1 are connected with the pins a and f respectively, and the power thereof is marked as P1＝Paf(ii) a The two ends of the strip-shaped electric heating structure 1 at the middle position are respectively connected with a pin b and a pin e, and the power of the strip-shaped electric heating structure is recorded as P2＝Pbe(ii) a The two ends of the strip-shaped electric heating structure 1 at the innermost circle are respectively connected with a pin c and a pin d, and the power of the strip-shaped electric heating structure is recorded as P3＝Pcd. The total power P of the heating film of the power battery in fig. 1 is P1+P2+P3＝Paf+Pbe+Pcd。
Preferably, the annular strip-shaped electric heating structure 1 comprises a plurality of bending sections, and two ends of the strip-shaped electric heating structure 1 extend out from the same side of the insulating wrapping layer 2. As shown in fig. 1, the power battery heating film in fig. 1 includes three strip-shaped electric heating structures 1 which are bent into a ring shape and are sequentially nested, and each strip-shaped electric heating structure 1 includes a plurality of bending sections, the bending section shown in fig. 1 includes a right-angle bending section and a 180-degree bending section (reverse bending section), and a longer strip-shaped electric heating structure 1 can be arranged in an insulating wrapping layer 2 with a smaller area by setting the plurality of bending sections, so that more electric heating structures are arranged in a unit area, and space utilization rate is improved.
Referring to fig. 2, since the peripheral temperature of the battery module 4 is low and the internal temperature is high, the heating film attached to the bottom of the battery module 4 may also be a heating film with a high outer ring heating power and a low inner ring heating power, and preferably, the heating powers of the electric heating structures from the inside to the outside are sequentially increased. As shown in fig. 2, the power battery heating film comprises an inner ring electric heating structure 11 (power is denoted as P)Inner ring) Middle ring electric heating structure 12 (power is marked as P)Middle ring) And an outer ring electric heating structure 13 (power is denoted as P)Outer ring) The power relationship of the three-layer electric heating structure is as follows: pOuter ring＞PMiddle ring＞PInner ring. So set up, can make the heating film heat to the specific heating demand at the different positions of battery module 4 to make each position temperature of battery module 4 more unanimous, improve the homogeneity of battery work.
In addition, the scheme can also achieve the purpose of power grading by designing different parallel connection quantities of the electric heating structures and different bending modes of the strip-shaped electric heating structures 1 in the insulating wrapping layer 2.
It should be noted that, the electric heating structure in the present invention may adopt a rigid electric heating material or a flexible electric heating material, and preferably, the electric heating structure in this scheme is a flexible electric heating wire. Specifically, the electric heating wire can adopt a common metal resistance wire, can also adopt a flexible PTC electric heating wire and the like, and preferably, the electric heating structure in the scheme is the metal resistance wire.
The utility model also provides a power battery temperature control system, include as above power battery heating film. The derivation process of the beneficial effects generated by the power battery temperature control system is substantially similar to the derivation process of the beneficial effects brought by the power battery heating film, and therefore, the description is omitted here.
Referring to fig. 3, the temperature control system for a power battery according to the present disclosure includes a heating film 100, a battery 200, a BMS (battery management system) 300, and an actuator 500, wherein the actuator 500 may adopt a relay or a single chip controller, etc. for controlling different electric heating structures of the heating film 100 to be powered on, so that the heating film 100 outputs different heating powers. Preferably, the power battery temperature control system further comprises a temperature detection device for detecting the temperature difference between the inside and the outside of the battery, the temperature detection device can adopt a BMS300 or a temperature sensor 400, and both the BMS300 and the temperature sensor 400 can obtain the temperature (denoted as T) inside the battery 200B) And the set temperature of the power battery temperature control system is recorded as TSThe temperature difference between the inside and outside of the battery is TS-TBAnd the power battery temperature control system can select the most appropriate heating power of the heating film 100 according to the size of delta T.
Referring to FIG. 4, T in FIG. 41、T2And T3Is the critical trigger temperature difference T of each step power1＜T2＜T3. The specific working process of the power battery temperature control system in the scheme is as follows: firstly obtaining the temperature difference delta T between the inside and the outside of the battery, then judging the size of the delta T, if T is T3If the temperature difference is larger than or equal to Δ T, all pins are controlled to be powered on (i.e., af, be and cd are powered on) through the actuator 500, and the power of the heating film 100 is the total power P; if T2≤ΔT＜T3If the temperature difference is moderate, two electric heating structures are needed to be electrified for working (af and be electrification), and the heating power output by the heating film 100 is Paf+Pbe(ii) a If T1≤ΔT＜T2Indicating a small temperature difference, only a single electric heating structure is needed to be energized (af), and the heating power of the heating film 100 is Paf(ii) a If the delta T does not reach the minimum critical temperature T1The heating film 100 is not electrically operated.
The utility model has the advantages of it is following:
1) the heating film of the power battery is designed into a heating form with step power, the design requirements of the use environment and the heating rate of the power battery can be met by adjusting the critical trigger temperature values of different step powers, and the situations of overheating and insufficient heating during heating of the battery are avoided;
2) the scheme can also divide the order by refining the power, namely the total power P is P1+P2+…+PnWhen n is larger, the power battery can be heated more finely, so that the waste of battery energy is avoided, and the method has good economical efficiency and practicability.
The utility model also provides a power battery system, including battery and as above power battery heating film or as above power battery temperature control system, the derivation process of the beneficial effect that this power battery system produced is similar roughly with the derivation process of the beneficial effect that above-mentioned power battery heating film brought, so this paper is no longer repeated.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a power battery heating film, its characterized in that includes that a plurality of electric heating structure that connect in parallel each other and parcel are a plurality of electric heating structure's insulating parcel layer, every electric heating structure's both ends all are connected with stretch out in the lead-out wire in the insulating parcel layer outside.
2. The power cell heating film according to claim 1, wherein the electrical heating structure is a strip-shaped electrical heating structure bent into a ring shape.
3. The power cell heating membrane according to claim 2, wherein a plurality of annular electrical heating structures are nested one inside the other.
4. The power cell heating film according to claim 3, wherein the heating power of each electric heating structure from inside to outside is increased sequentially.
5. The power battery heating film according to claim 2, wherein the annular strip-shaped electric heating structure comprises a plurality of bending sections, and two ends of the strip-shaped electric heating structure extend out from the same side of the insulating wrapping layer.
6. The power cell heating membrane of claim 1, wherein the electrical heating structure is a flexible electrical heating wire.
7. The power cell heating film according to claim 6, wherein the electrical heating structure is a metal resistance wire.
8. A power battery temperature control system, characterized by comprising a power battery heating film according to any one of claims 1 to 7.
9. The power battery temperature control system of claim 8, further comprising a temperature detection device for detecting a temperature difference between inside and outside of the battery.
10. A power battery system comprising a battery, characterized by further comprising a power battery heating film according to any of claims 1 to 7 or a power battery temperature control system according to any of claims 8 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144020.6U CN214013026U (en) | 2020-12-22 | 2020-12-22 | Power battery heating film, power battery temperature control system and power battery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144020.6U CN214013026U (en) | 2020-12-22 | 2020-12-22 | Power battery heating film, power battery temperature control system and power battery system |
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| CN214013026U true CN214013026U (en) | 2021-08-20 |
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| CN202023144020.6U Active CN214013026U (en) | 2020-12-22 | 2020-12-22 | Power battery heating film, power battery temperature control system and power battery system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122566A (en) * | 2021-11-27 | 2022-03-01 | 东莞新能源科技有限公司 | Electrochemical device and electric equipment comprising same |
| WO2023137872A1 (en) * | 2022-01-20 | 2023-07-27 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and manufacturing method and device for battery |
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2020
- 2020-12-22 CN CN202023144020.6U patent/CN214013026U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122566A (en) * | 2021-11-27 | 2022-03-01 | 东莞新能源科技有限公司 | Electrochemical device and electric equipment comprising same |
| WO2023137872A1 (en) * | 2022-01-20 | 2023-07-27 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and manufacturing method and device for battery |
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