CN216055032U - Battery system and vehicle - Google Patents

Battery system and vehicle Download PDF

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Publication number
CN216055032U
CN216055032U CN202121480697.9U CN202121480697U CN216055032U CN 216055032 U CN216055032 U CN 216055032U CN 202121480697 U CN202121480697 U CN 202121480697U CN 216055032 U CN216055032 U CN 216055032U
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battery module
heat
temperature
change material
battery system
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CN202121480697.9U
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朱瑞元
郭舒
彭青波
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BYD Co Ltd
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BYD Co Ltd
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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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The application discloses a battery system and a vehicle, wherein the battery system comprises a first box body, a second box body and a battery module; the first box body is provided with a phase change material; the second box body is connected with the first box body and forms a cavity in a surrounding manner; the battery module is accommodated in the cavity. In this application embodiment, be provided with the phase change material sensitive to the temperature in the first box, deviate from in the second box the one end of first box is equipped with heat radiation structure, and when the temperature of battery module was too high, phase change material melts the heat absorption right the first end cooling of battery module, heat radiation structure is right the second end of battery module dispels the heat, and when the temperature of battery module was too high, phase change material and heat radiation structure dispel the heat to the first end and the second end of battery module simultaneously, avoided having great temperature ladder among the battery module.

Description

Battery system and vehicle
Technical Field
The present application relates to the field of battery technology, and in particular, to a battery system and a vehicle.
Background
At present, the heat management system of the lithium ion battery module on the market generally adopts the modes of air cooling, liquid cooling and refrigerant cooling to achieve the purposes of cooling, heating and heat preservation of the battery module, and the working temperature of the battery pack is maintained between preset temperatures.
SUMMERY OF THE UTILITY MODEL
The main objective of this application provides a battery system and vehicle, battery system has phase change material, and phase change material melts the heat absorption at higher temperature, solidifies the heat release at the lower temperature for the temperature of battery module in the battery system maintains within a certain extent all the time.
In a first aspect, an embodiment of the present application provides a battery system, where the battery system includes:
the battery module is provided with a first end and a second end, and the first end of the battery module and the second end of the battery module are oppositely arranged;
a first case; the first box body is provided with a phase change material, and the phase change material is close to or directly contacted with the first end of the battery module;
the second box body is connected with the first box body and surrounds to form a cavity for accommodating the battery module; the second box body comprises a heat dissipation structure used for dissipating heat of the second end of the battery module.
According to the first aspect, in one possible implementation manner, the melting temperature of the phase-change material is 35-45 ℃, and when the temperature of the first end of the battery module reaches the melting temperature, the phase-change material melts and absorbs heat to cool the first end of the battery module;
the solidification temperature of the phase-change material is between 15 and 25 ℃, and when the temperature of the second end of the battery module is reduced to the solidification temperature, the phase-change material is solidified to release heat so as to heat the second end of the battery module.
According to the first aspect, in a possible implementation manner, the heat dissipation structure is located at one end of the second box body, which is far away from the first box body, and the cross section of the heat dissipation structure is U-shaped or arc-shaped.
According to the first aspect, in one possible implementation manner, the thickness of both ends of the cross section of the heat dissipation structure becomes gradually thicker toward the middle.
According to the first aspect, in a possible implementation manner, the second box further includes a side plate, the heat dissipation structure and the side plate form a groove, and the groove and the first box form the closed cavity.
According to the first aspect, in one possible implementation, the side plate is integrally formed with the heat dissipation structure.
According to a first aspect, in one possible implementation, the first box comprises a first box body and a vehicle body structure, the first box body supports the vehicle body structure, and the first box body is of a flat plate type.
According to a first aspect, in one possible implementation, the vehicle body structure includes a passenger compartment seat fixed to the first case body.
According to the first aspect, in one possible implementation manner, the first box further comprises a first composite material with a heat preservation function.
According to the first aspect, in a possible implementation manner, the second box body comprises a second composite material with a heat preservation function.
In a second aspect, embodiments of the present application provide a vehicle including a battery system as described above.
In this application embodiment, be provided with the phase change material sensitive to the temperature in the first box, deviate from in the second box the one end of first box is equipped with heat radiation structure, and when the high temperature of battery module, the phase change material melts the heat absorption right the first end cooling of battery module, heat radiation structure is right the second end of battery module dispels the heat, avoids having great temperature ladder among the battery module.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a front view of a battery system provided in an embodiment of the present application;
fig. 2 is a top view of a battery system provided in an embodiment of the present application.
Wherein; 100. a first case; 110. a first case body; 120. a passenger compartment seat; 200. a second case; 210. a heat dissipation structure; 220. side plates.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, technical solutions between the various embodiments of the present application may be combined with each other, but it must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not within the protection scope of the present application.
The heat management system of the lithium ion battery module on the market in the prior art usually adopts air cooling, liquid cooling and refrigerant cooling modes to achieve the purposes of cooling, heating and heat preservation of the battery module, so that the working temperature of the battery pack is maintained between preset temperatures, the mode of cooling the battery module is provided with an auxiliary device, the overall structure of the battery system is complex, and the mode of cooling the battery module can also enable the battery module to have larger temperature steps when the battery module is cooled.
Referring to fig. 1 to 2, an embodiment of the present application provides a battery system, where fig. 1 is a front view of the battery system provided in the embodiment of the present application, and fig. 2 is a top view of the battery system provided in the embodiment of the present application; the battery system comprises a first box 100, a second box 200 and a battery module; the battery module comprises a first end and a second end which are oppositely arranged; the first case 100 has a phase change material; the phase change material is close to or directly contacted with the first end of the battery module; the second case 200 is connected to the first case 100 and encloses a cavity for accommodating the battery module; the second case 200 includes a heat dissipation structure 210 for dissipating heat from the second end of the battery module.
Specifically, the phase change material of the first box 100 is sensitive to temperature change, the melting temperature of the phase change material is about 40 ℃, and the solidification temperature is about 20 ℃; when the battery module generates heat during operation, and the temperature of the battery module is too high (up to 40 ℃), the phase-change material melts, and at the moment, the phase-change material absorbs a large amount of heat of the battery module, so that the temperature of the battery module is reduced, thereby maintaining the temperature of the battery module below 40 ℃, and in addition, the phase change material can not only cool the battery module, but also supply heat to the battery module, when the ambient temperature is too low, for example, when the ambient temperature is lower than 20 ℃, at which time, the phase change material in the liquid state in the first tank 100 starts to solidify, heat can be discharged, starting to supply heat to the battery module such that the temperature of the battery module is maintained between 20 ℃ and 40 ℃, in a possible implementation manner, when the phase-change material of the first tank 100 is in an environment with a temperature of 20 ℃ to 40 ℃, the phase-change material may be in a state of solid-liquid coexistence.
In the embodiment of the present application, the cavity is a closed space, and the phase change material of the first case 100 may or may not directly contact the battery module.
In the embodiments provided by the present application, when the phase change material undergoes a phase change (melting or solidification), the volume change rate of the phase change material is small, and the phase change material in the battery system undergoes a phase change, so that the battery system does not swell or collapse.
In this application embodiment, be provided with the phase change material sensitive to the temperature in the first box 100, when the temperature of battery module was too high, the phase change material melts the heat absorption right the battery module cooling, works as the temperature of battery module is crossed when hanging down excessively, and phase change material solidifies for the heat supply of battery module, and phase change material makes the temperature of battery module maintain throughout within certain temperature range through state transition (melting or solidification).
In the embodiment that this application provided, hold through the cooperation of first box 100 and second box 200 the battery module, when the temperature of battery module was too high, the heat radiation structure in the phase change material of the first box 100 of accessible and the second box 200 dispels the heat to the first end of battery module simultaneously, the second end has dispelled the heat, realized cooling down to the battery module, can avoid the great temperature ladder of existence of battery module simultaneously, the structure of the battery system that this application embodiment provided is very simple, this battery system can only include first box 100, second box 200 and battery module, need not set up other part, can just accomplish and dispel the heat to the battery module, and can avoid having great temperature ladder among the battery module.
The melting temperature of the phase-change material is 35-45 ℃, and when the temperature of the first end of the battery module reaches the melting temperature, the phase-change material melts and absorbs heat to cool the first end of the battery module;
the solidification temperature of the phase-change material is 15-25 ℃, so that when the temperature of the second end of the battery module is reduced to the solidification temperature, the phase-change material is solidified to release heat, and the second end of the battery module is heated.
In the embodiment that this application provided, the first end of battery module is close to the utmost point post of battery module, and the near heat production of utmost point post is more in the battery module, and under the general condition, the temperature of the first end of battery module can be higher than the temperature of battery module second end.
The battery system only needs to adopt a phase change material to maintain the temperature uniformity of the battery system, the difference between the melting temperature and the solidification temperature of the phase change material is small, when the temperature of the first end of the battery module is between the solidification temperature and the melting temperature, the temperature difference between the first end and the second end of the battery module is less than or equal to the difference between the melting temperature and the solidification temperature, for example, if the melting temperature is 45 ℃ and the solidification temperature is 15 ℃, at this time, the highest temperature of the first end of the battery module is 45 ℃ and the lowest temperature of the second end of the battery module is 15 ℃, that is, the maximum temperature difference between the first end and the second end of the battery module is 30 ℃, even if the temperature difference between the first end and the second end of the battery module reaches 30 ℃, the temperature difference between the first end and the second end of the battery module is still small, and the temperatures of the first end and the second end of the battery module are both within the normal temperature range of the battery module, the working performance of the battery module can not be influenced, and therefore the battery system provided by the application does not need to adopt a plurality of different types of phase-change materials to perform stepped temperature control on each region of the battery module.
In the embodiment provided by the present application, the heat dissipation structure 210 is located at an end of the second case 200 away from the first case 100, and the cross section of the heat dissipation structure 210 is U-shaped or arc-shaped.
The thickness of both ends of the cross section of the heat dissipation structure 210 gradually becomes thicker toward the middle.
Specifically, the first box 100 is close to or directly contacts with a first end of the battery module, the second box 200 is close to or contacts with a second end of the battery module, when the battery module is overheated, the phase change material in the first box 100 melts and absorbs heat to cool the first end of the battery module, the heat dissipation structure 210 in the second box 200 is streamlined and can dissipate heat of the second end of the battery module, and the first box 100 and the second box 200 simultaneously dissipate heat of the first end and the second end of the battery module, so that the battery module has good temperature uniformity, and temperature difference of each local part in the battery module is reduced.
Wherein, heat radiation structure specifically is U type or arc, heat radiation structure 210 still has graceful outward appearance outside having good radiating effect.
In a possible implementation, the thickness of the two ends of the cross section of the heat dissipation structure becomes thicker gradually towards the middle.
When the battery system is applied to a vehicle, the heat in the heat dissipation structure 210 may be taken away by a rapid air flow while the vehicle is running.
The second casing 200 further includes a side plate 220, the heat dissipation structure 210 and the side plate 220 form a groove, and the groove and the first casing 100 form the closed cavity.
In the embodiments provided in the present application, the cavity is a closed space, the battery module is accommodated in the closed space, when the battery module is specifically mounted, the battery module is fixed in the groove, and when the first case 100 and the second case 200 are mated, the first case 100 and the second case 200 surround each other, and the battery module is enclosed in a cavity formed by the first case 100 and the second case 200, so that the overall structure of the battery system is very simple, the battery system has the advantages of greatly reducing cost and structural components, low energy consumption and environmental protection, does not need outside air to enter the cavity to dissipate heat of the battery module, the problems of dirty blockage, thermal resistance increase, short circuit and the like of a battery pack caused by the fact that dust and moisture directly enter the cavity along with air can be avoided.
In the embodiment that this application provided, curb plate 220 with heat radiation structure 210 integrated into one piece further improves battery system's seal performance, also makes things convenient for battery system's installation simultaneously, when assembling battery system, will the battery module is placed in the recess, with first box closing cap on the second box can.
The first case 100 includes a first case body 110 and a vehicle body structure, the first case body 110 supports the vehicle body structure, and the first case body 110 is of a flat plate type.
In the embodiment provided by the present application, the battery system may be applied to a vehicle, wherein the first box 100 may be used as a part of a vehicle body, the battery system has a function of heating the vehicle, for example, when the weather is cold, when a battery module in the battery system is working, heat is generated, and the heat is transferred to a cabin through the first box body 110, so as to realize the function of heating the vehicle, and in addition, when the phase change material in the first box 100 is solidified, a large amount of heat is also released, wherein a part of the heat released by the phase change material is transferred to the battery module to supply heat to the battery module, and a part of the heat is transferred to the first box body 110 to heat the cabin of the vehicle, and the first box body 110 may be used as a bottom plate of the cabin in the vehicle.
Specifically, the vehicle body structure includes a passenger compartment seat 120, and the passenger compartment seat 120 is fixed to the first case body 110.
The first case 100 further includes a first composite material having a heat insulating function.
Specifically, when the battery system works in a low-temperature environment, the phase-change material in the first box 100 is solidified and can generate a large amount of heat, the first composite material has a heat preservation effect and can provide heat for the battery module continuously, and if the battery system is applied to a vehicle, the first composite material slowly releases the heat generated by the phase-change material into the crew compartment so as to continuously provide heat for the crew compartment of the vehicle.
The second box 200 comprises a second composite material with a heat preservation function, and the second composite material and the first composite material can be the same material or different materials; in the embodiment provided by the application, when the battery system is applied to a battery cell system and travels under a high/normal temperature working condition, the second box 200 can conduct heat at the bottom of the battery module to the surface of the heat dissipation structure 210, and the heat is taken away by fast flowing air; under the lower condition of ambient temperature, the second combined material can keep warm, lets battery module can maintain normal operating temperature.
The embodiment of the application also provides a vehicle, and the vehicle comprises the battery system.
The first box 100 of the battery system can be used as a part of the vehicle body of the vehicle, the first box body 110 of the first box 100 can be used as a bottom plate of a passenger compartment of the vehicle, the first box body 110 can be used for supporting a passenger compartment seat 120 of the passenger compartment, when the battery system is operated, heat generated by the battery system can be released into the passenger compartment of the vehicle to supply heat to the passenger compartment of the vehicle, when the vehicle is driven, fast flowing air can dissipate heat of the battery system, and the heat dissipation structure 210 of the second box 200 is exposed outside the external environment.
The above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents made by the claims and the accompanying drawings, which are included in the scope of the present application and are directly/indirectly applied to other related technical fields, are included in the scope of the present application.

Claims (10)

1. A battery system, comprising:
the battery module is provided with a first end and a second end, and the first end of the battery module and the second end of the battery module are oppositely arranged;
a first case; the first box body is provided with a phase change material, and the phase change material is close to or directly contacted with the first end of the battery module;
the second box body is connected with the first box body and surrounds to form a cavity for accommodating the battery module; the second box body comprises a heat dissipation structure used for dissipating heat of the second end of the battery module.
2. The battery system of claim 1, wherein;
the melting temperature of the phase-change material is 35-45 ℃, and when the temperature of the first end of the battery module reaches the melting temperature, the phase-change material melts and absorbs heat to cool the first end of the battery module;
the solidification temperature of the phase-change material is between 15 and 25 ℃, and when the temperature of the second end of the battery module is reduced to the solidification temperature, the phase-change material is solidified to release heat so as to heat the second end of the battery module.
3. The battery system of claim 1, wherein the heat dissipation structure is located at an end of the second case facing away from the first case, and the cross section of the heat dissipation structure is U-shaped or arc-shaped.
4. The battery system according to claim 1, wherein the heat dissipation structure has a cross-section in which the thickness of both ends is gradually thicker toward the middle.
5. The battery system of claim 3, wherein the second housing further comprises a side plate, the heat dissipation structure and the side plate form a groove, and the groove and the first housing form the sealed cavity.
6. The battery system of claim 5, wherein the side plate is integrally formed with the heat dissipation structure.
7. The battery system according to claim 1, wherein the first case includes a first case body that supports the vehicle body structure, and a vehicle body structure, the first case body being of a flat plate type.
8. The battery system of claim 7, wherein the vehicle body structure includes a passenger compartment seat secured to the first case body.
9. The battery system of claim 1, wherein the first housing further comprises a first composite material having a thermal insulating function, and wherein the second housing comprises a second composite material having a thermal insulating function.
10. A vehicle characterized in that the vehicle comprises a battery system according to any one of claims 1-9.
CN202121480697.9U 2021-06-29 2021-06-29 Battery system and vehicle Active CN216055032U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121480697.9U CN216055032U (en) 2021-06-29 2021-06-29 Battery system and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121480697.9U CN216055032U (en) 2021-06-29 2021-06-29 Battery system and vehicle

Publications (1)

Publication Number Publication Date
CN216055032U true CN216055032U (en) 2022-03-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121480697.9U Active CN216055032U (en) 2021-06-29 2021-06-29 Battery system and vehicle

Country Status (1)

Country Link
CN (1) CN216055032U (en)

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