CN218472085U - Battery core, battery pack, thermal management system and vehicle - Google Patents

Abstract

The utility model discloses an electricity core, battery package, thermal management system and vehicle, electricity core includes: a housing; the battery cell comprises a battery cell body, wherein the battery cell body is arranged in a shell, the outer surface of the shell is provided with a heat conducting piece, the heat conductivity coefficient of the heat conducting piece is greater than that of the shell, or the part of the shell is formed into a heat conducting part, and the heat conductivity coefficient of the heat conducting part is greater than that of the rest part of the shell. According to the utility model discloses an electricity core, the coefficient of heat conductivity that is equipped with heat-conducting piece and heat-conducting piece through the surface of casing is greater than the coefficient of heat conductivity of casing, perhaps the part of casing forms into the heat conduction portion, the coefficient of heat conduction portion is greater than the coefficient of heat conductivity of the rest of casing, heat-conducting piece or heat conduction portion set up in the higher region of local temperature of electricity core body, make the heat of electricity core body can disperse fast through heat-conducting piece or heat conduction portion, be favorable to the heat transfer in the great region of electricity core body calorific capacity, make the temperature distribution of electricity core more even, reduce the difference in temperature of electricity core, be favorable to prolonging the life of electricity core.

Description

Battery core, battery pack, thermal management system and vehicle

Technical Field

The utility model relates to the field of automotive technology, more specifically relates to an electricity core, battery package, thermal management system and vehicle.

Background

In the correlation technique, when the battery pack is charged, the heat of the battery cell is not easy to exchange, and the heat is easy to accumulate at each part of the battery cell, so that the inside of the battery cell can generate a large temperature difference, and the service life of the battery cell is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an electric core, the temperature distribution of electric core is more even, is favorable to increase of service life.

Another object of the present invention is to provide a battery pack having the above battery cell.

It is still another object of the present invention to provide a thermal management system having the above battery pack.

It is yet another object of the present invention to provide a vehicle having the above thermal management system.

According to the utility model discloses electric core, include: a housing; the battery cell comprises a battery cell body, wherein the battery cell body is arranged in the shell, the outer surface of the shell is provided with a heat conduction piece, the heat conductivity of the heat conduction piece is larger than that of the shell, or the part of the shell is formed into a heat conduction part, and the heat conductivity of the heat conduction part is larger than that of the rest part of the shell.

According to the utility model discloses electric core, the coefficient of heat conductivity that is equipped with heat-conducting piece and heat-conducting piece through the surface of casing is greater than the coefficient of heat conductivity of casing, perhaps the part of casing forms into the heat conduction portion, the coefficient of heat conduction portion is greater than the coefficient of heat conductivity of the rest of casing, heat-conducting piece or heat conduction portion set up in the higher region of local temperature of electric core body, make the heat of electric core body can be passed through heat-conducting piece or heat conduction portion and shed fast, be favorable to the heat transfer in the great region of electric core body calorific capacity, make the temperature distribution of electric core more even, reduce the difference in temperature of electric core, be favorable to prolonging the life of electric core.

In addition, according to the utility model discloses above-mentioned embodiment's electric core can also have following additional technical characterstic:

according to the utility model discloses electric core of some embodiments, follow the length direction of casing, at least one end in the both ends of casing be equipped with this body coupling of electric core's electrode, the heat conduction portion or the heat-conducting piece is located be equipped with of casing the one end of electrode.

According to some embodiments of the utility model, follow the length direction of casing, the both ends of casing all are equipped with the electrode, the both ends of casing all are equipped with heat conduction portion or heat-conducting member.

According to some embodiments of the invention, the heat conducting member or the heat conducting portion comprises: an end portion located on an end surface of one end of the case in a length direction, the end portion being provided with the electrode; an annular portion having an axial end connected to the end portion.

According to some embodiments of the invention, when the portion of the housing is formed as a heat conducting portion, the heat conducting portion is in one piece with the rest of the housing.

According to some embodiments of the invention, the heat conducting member or the heat conducting portion is a phase change material structure.

According to the utility model discloses battery package, include: according to the embodiment of the utility model, the number of the battery cells is multiple, and the battery cells are stacked along the thickness direction of the battery cells; and the heat exchange piece is used for dissipating heat of the battery core.

According to the utility model discloses the battery package, the coefficient of heat conductivity that is equipped with heat-conducting piece and heat-conducting piece through the surface of casing is greater than the coefficient of heat conductivity of casing, perhaps the part of casing forms into the heat conduction portion, the coefficient of heat conduction portion is greater than the coefficient of heat conductivity of the all the other parts of casing, heat-conducting piece or heat conduction portion set up in the higher region of local temperature of electric core body, make the heat of electric core body can dispel through heat-conducting piece or heat conduction portion fast, be favorable to the heat transfer in the great region of electric core body calorific capacity, make the temperature distribution of electric core more even, reduce the difference in temperature of electric core, be favorable to prolonging the life of electric core.

According to some embodiments of the utility model, the heat transfer piece is the cold drawing, the cold drawing is located electric core width direction's one side when the surface of casing is equipped with heat-conducting piece, heat-conducting piece with the cold drawing laminating sets up.

According to the utility model discloses a some embodiments, cold board is with a plurality of be equipped with heat conduction structure between the electricity core and glue.

According to the utility model discloses thermal management system includes: a refrigeration circuit; according to the utility model discloses battery package, the heat transfer has refrigerant passageway, the heat transfer connect in the refrigeration circuit.

According to the utility model discloses heat management system, the coefficient of heat conductivity that is equipped with heat-conducting piece and heat-conducting piece through the surface of casing is greater than the coefficient of heat conductivity of casing, perhaps the part of casing forms into the heat conduction portion, the coefficient of heat conduction portion is greater than the coefficient of heat conductivity of the all the other parts of casing, heat-conducting piece or heat conduction portion set up in the higher region of local temperature of electric core body, make the heat of electric core body can be passed through heat-conducting piece or heat conduction portion and shed fast, be favorable to the heat transfer in the great region of electric core body calorific capacity, make the temperature distribution of electric core more even, reduce the difference in temperature of electric core, be favorable to prolonging the life of electric core.

According to the utility model discloses vehicle includes according to the utility model discloses the embodiment thermal management system.

According to the utility model discloses the vehicle, the coefficient of heat conductivity that is equipped with heat-conducting piece and heat-conducting piece through the surface of casing is greater than the coefficient of heat conductivity of casing, perhaps the part of casing forms into the heat conduction portion, the coefficient of heat conduction portion is greater than the coefficient of heat conductivity of the rest of casing, heat-conducting piece or heat conduction portion set up in the higher region of local temperature of electric core body, make the heat of electric core body can be passed through heat-conducting piece or heat conduction portion and shed fast, be favorable to the heat transfer in the great region of electric core body calorific capacity, make the temperature distribution of electric core more even, reduce the difference in temperature of electric core, be favorable to prolonging the life of electric core.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at circle A;

fig. 3 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of FIG. 3 at circle B;

fig. 5 is an enlarged schematic view of the structure of fig. 3 at circle C.

Reference numerals:

100. an electric core; 200. a battery pack;

10. a housing;

20. an electrode;

30. a heat conductive member; 31. a heat conducting portion; 301. an end portion; 302. an annular portion;

40. a cold plate; 41. a refrigerant inlet; 42. a refrigerant outlet; 43. a joint;

50. and (4) heat-conducting structural adhesive.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and "a plurality" means two or more, and the first feature may be "on" or "under" the second feature, and may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature therebetween, and the first feature being "on", "above" and "above" the second feature may include the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is higher in level than the second feature.

A battery cell 100 according to an embodiment of the present invention is described below with reference to the drawings.

Referring to fig. 1 to 4, a battery cell 100 according to an embodiment of the present invention may include: casing 10 and cell body.

Particularly, in the casing 10 was located to the electric core body, casing 10 can protect the electric core body, avoided the electric core body to receive the damage, and can conduct the heat of electric core body to the outside through casing 10, be convenient for dispel the heat to the electric core body.

The inventor of this application discovers, in the correlation technique, the energy density of battery package is high, and the integrated level is high, and is bulky, easily leads to the inside internal resistance of electric core inhomogeneous for different positions of electric core calorific capacity are different, and when the battery package was charged, the heat of electric core was difficult for changing out, and the heat is easy to be accumulated at each position of electric core, makes the inside great difference in temperature that can produce of electric core, influences the life of electric core.

In order to solve the problem of large internal temperature difference of the battery cell 100, in the present invention, as shown in fig. 1, fig. 2 and fig. 4, the outer surface of the casing 10 may be provided with a heat conducting member 30, and the heat conductivity coefficient of the heat conducting member 30 is greater than the heat conductivity coefficient of the casing 10; alternatively, a portion of the case 10 is formed as the heat conduction portion 31, and the heat conduction coefficient of the heat conduction portion 31 is larger than that of the remaining portion of the case 10. From this, can spill the heat of electric core body fast through heat conduction piece 30 or heat conduction portion 31, heat conduction piece 30 or heat conduction portion 31 can set up in the higher region of local temperature of electric core body, for example the arrangement region of heat conduction piece 30 or heat conduction portion 31 can design according to the change of heat load, realize the heat transfer demand in different regions, set up heat conduction piece 30 or heat conduction portion 31 according to the heat of required cooling, can effectively solve the inhomogeneous problem that generates heat in the inside of electric core 100, be favorable to prolonging the life of electric core 100.

For example, the battery cell body may include a low temperature region and a high temperature region, the temperature of the high temperature region is greater than that of the low temperature region, and the heat conducting member 30 or the heat conducting portion 31 may be disposed in the high temperature region, where the high temperature region may be multiple (greater than or equal to two), and the low temperature region may be one or multiple separated by the high temperature region.

In some embodiments, as shown in fig. 3 and 4, when the battery cell 100 is applied to the battery pack 200, the battery pack 200 may include a heat exchange member, and the heat exchange member is used to dissipate heat from the battery cell 100, which is beneficial to prolonging the service life of the battery cell 100 and ensuring the operation reliability of the battery pack 200.

In addition, the heat exchanger can be disposed on one side of the width direction (for example, the up-down direction shown in fig. 3) of the battery cell 100, and the heat conducting member 30 or the heat conducting portion 31 can be attached to the heat exchanger, the heat conductivity coefficient of the heat conducting member 30 is greater than that of the casing 10, or the heat conductivity coefficient of the heat conducting portion 31 is greater than that of the rest of the casing 10, so that excessive heat on the battery cell body can be transferred to the heat exchanger through the heat conducting member 30 or the heat conducting portion 31 to enhance the heat exchange capability of the heat exchanger, the boiling heat exchange of the heat exchanger can be increased, the temperature of an area provided with the heat conducting member 30 or the heat conducting portion 31 can be rapidly reduced, the heat exchange effect is good, and the heat dissipation effect of the battery cell 100 is good.

For example, compare with the electric core of correlation technique, the utility model discloses a surface of casing 10 is equipped with heat conduction piece 30 and the coefficient of heat conduction piece 30 is greater than the coefficient of heat conduction of casing 10, or the part of casing 10 forms into heat conduction portion 31, and the coefficient of heat conduction portion 31 is greater than the coefficient of heat conduction of the rest of casing 10, can make the highest temperature reduction 7 degrees of electric core 100, can realize deriving the heat of electric core 100 fast, is favorable to prolonging the life of electric core 100.

Therefore, the utility model discloses in, can effectively derive the temperature in electric core 100 local high temperature area through the mixed cooling management mode that heat-conducting piece 30 or heat-conducting part 31 and heat transfer piece combine, can let the temperature distribution in electric core 100 more even, avoid appearing electric core 100's local high temperature and cause the great problem of inside difference in temperature, be favorable to prolonging electric core 100's life. Simultaneously, can increase the heat flux density of heat transfer spare through heat-conducting piece 30 or heat conduction portion 31 to strengthen the inside boiling heat transfer of heat transfer spare, play the effect of intensive heat transfer, realize that electric core 100 is effective and quick and heat transfer with heat transfer spare, can form an intensive heat transfer interval, furthest's performance heat transfer spare's radiating effect, make heat transfer spare can have better heat transfer capacity, and the heat transfer capacity of electric core 100 has been increased, possess outstanding energy-conserving attribute.

The mixed cooling management mode that heat-conducting piece 30 or heat-conducting part 31 and heat transfer piece combine can realize more nimble adjustment means, can have faster response speed, can control the inside difference in temperature of electric core 100 better more accurately, avoid appearing the local high temperature of electric core 100 and cause the great problem of inside difference in temperature, and have fabulous geometric flexibility, avoid carrying out the secondary design of thermal management system for a certain tiny position, the design degree of difficulty of heat transfer piece has been reduced, avoided heat transfer piece for solving electric core 100's inside difference in temperature greatly and increase the cooling runner, be favorable to reducing design and manufacturing cost.

To sum up, the utility model discloses an adopt the hybrid cooling management mode that heat-conducting piece 30 or heat-conducting part 31 and heat transfer piece combine, can effectively absorb the temperature in electric core 100 local high temperature area, can increase the heat transfer in electric core 100 high temperature area, can effectively carry out the heat transfer with heat transfer piece simultaneously, furthest's performance heat transfer piece's advantage to reduce the difference in temperature of electric core 100, be convenient for prolong the life of battery package 200.

For convenience of description, the directions such as "front-back direction", "left-right direction", and "up-down direction" in the present invention are based on the orientation relationship shown in the drawings, and are not limited to the orientation in the practical application process.

According to the utility model discloses electric core 100, the coefficient of heat conductivity that is equipped with heat conduction piece 30 and heat conduction piece 30 through the surface of casing 10 is greater than the coefficient of heat conductivity of casing 10, perhaps the part of casing 10 forms into heat conduction portion 31, the coefficient of heat conductivity of heat conduction portion 31 is greater than the coefficient of heat conductivity of the all the other parts of casing 10, heat conduction piece 30 or heat conduction portion 31 set up in the higher region of local temperature of electric core body, make the heat of electric core body can be dispelled out through heat conduction piece 30 or heat conduction portion 31 fast, be favorable to the great regional heat transfer of electric core body calorific capacity, make the temperature distribution of electric core 100 more even, reduce the difference in temperature of electric core 100, be favorable to prolonging the life of electric core 100.

According to some embodiments of the present invention, as shown in fig. 1, fig. 2 and fig. 4, along the length direction of the casing 10 (for example, the left and right directions shown in fig. 3), at least one of the two ends of the casing 10 is provided with the electrode 20, and the electrode 20 is connected to the battery cell body, in other words, one of the two ends of the casing 10 along the length direction is provided with the electrode 20, or both ends of the casing 10 along the length direction are provided with the electrodes 20.

When the electrode 20 is disposed at one of the two ends of the casing 10 along the length direction, the positive electrode and the negative electrode are both disposed at the same end of the casing 10 along the length direction, and may be any one of the two ends of the casing 10 along the length direction; when the case 10 is provided with the electrodes 20 at both ends in the longitudinal direction, the positive electrode and the negative electrode are respectively provided at both ends in the longitudinal direction of the case 10, one of the positive electrode and the negative electrode is provided at one end of the both ends in the longitudinal direction of the case 10, and the other of the positive electrode and the negative electrode is provided at the other end thereof.

For example, as shown in fig. 1 to 4, when both ends of the case 10 are provided with the electrodes 20, one of the ends of the case 10 is provided with one of a positive electrode and a negative electrode, and the other end is provided with the other of the positive electrode and the negative electrode.

Further, as shown in fig. 1, 2 and 4, the heat conducting portion 31 or the heat conducting member 30 may be provided at one end of the casing 10 where the electrode 20 is provided, in other words, when the electrode 20 is provided at one end of the casing 10, the heat conducting portion 31 or the heat conducting member 30 is provided at the end where the electrode 20 is provided, and when the electrode 20 is provided at both ends of the casing 10, the heat conducting portion 31 or the heat conducting member 30 is provided at both ends of the electrode 20.

In case of high-power rapid charging or operation of the battery pack 200, a large amount of heat is generated at the end of the case 10 where the electrode 20 is provided, resulting in an excessively high temperature at the end of the case 10 where the electrode 20 is provided. Be equipped with heat conduction portion 31 or heat-conducting piece 30 at the one end that is equipped with electrode 20 of electrode 20, when the one end temperature that is equipped with electrode 20 at casing 10 is higher, can transmit the heat to the outside fast through heat conduction portion 31 or heat-conducting piece 30 for the temperature distribution of electric core 100 is more even, has reduced the difference in temperature of electric core 100, has prolonged the life-span of electric core 100.

In some embodiments, as shown in fig. 1 and 3, the electrodes 20 are disposed at both ends of the housing 10 along the length direction of the housing 10, and the heat conducting portion 31 or the heat conducting member 30 is disposed at both ends of the housing 10. Under the high-power quick charge's of battery package 200 the condition or the during operation, the both ends of electricity core 100 can produce a large amount of heats, lead to the both ends high temperature of whole electricity core 100, can transmit the outside with the heat at casing 10 both ends fast through heat conduction portion 31 or heat-conducting piece 30 for the temperature distribution of electricity core 100 is more even, has reduced the difference in temperature of electricity core 100, has prolonged the life-span of electricity core 100.

In the embodiment of the present invention, the specific structure of the heat-conducting member 30 or the heat-conducting portion 31 may be set according to actual conditions.

For example, in some embodiments, as shown in fig. 1, 2 and 4, the heat conducting member 30 or the heat conducting portion 31 may include an end portion 301 and an annular portion 302, the end portion 301 is located on an end surface of the end of the housing 10 in the longitudinal direction where the electrode 20 is provided, and an axial end of the annular portion 302 is connected to the end portion 301. In the case of high-power fast charging or during operation of the battery pack 200, in the longitudinal direction (for example, the up-down direction shown in fig. 3) of the battery cell 100, the unidirectional heat conduction speed of the battery cell 100 is low, which easily causes the middle temperature of the battery cell 100 to be high and the temperatures at the two longitudinal ends to be low. From this, under tip 301 and annular portion 302's combined action, can be with the heat transfer of the vertical middle part of electric core 100 to the outside, ensure that thermal transmission effect is better for electric core 100's temperature distribution is more even, has reduced electric core 100's the difference in temperature, has prolonged electric core 100's life-span.

In some embodiments in which the battery pack 200 includes a heat exchange member, as shown in fig. 3 and 4, one end of the annular portion 302 may be attached to the heat exchange member, so that excessive heat at the longitudinal middle portion of the battery cell 100 may be transferred to the heat exchange member through the end portion 301 and the annular portion 302 to enhance the heat exchange capability of the heat exchange member, which may increase the boiling heat exchange of the heat exchanger, have a better heat exchange effect, ensure that the heat dissipation effect of the battery cell 100 is good, and facilitate reducing the temperature difference of the battery cell 100.

For example, in some embodiments, the heat conducting member 30 may completely cover the outer surface of the casing 10, or the whole casing 10 may form the heat conducting portion 31, which may be set according to the variation of the thermal load of the battery cell 100, so as to meet different use requirements.

In some embodiments of the present invention, when the portion of the housing 10 is formed as the heat conducting portion 31, the heat conducting portion 31 and the rest of the housing 10 are an integral piece, so as to ensure that the structural strength of the housing 10 is high, thereby omitting the separate assembly of the housing 10 and the heat conducting portion 31, improving the assembly process, and having high production efficiency.

In some embodiments, the thermal conductivity of the thermal conduction member 30 or the thermal conduction portion 31 may be greater than 200W/(m · K), so that the thermal conduction member 30 or the thermal conduction portion 31 has a higher thermal conductivity, and the thermal conduction effect of the thermal conduction member 30 or the thermal conduction portion 31 is better, so as to guide heat on the battery cell 100 to the outside, and ensure that the temperature distribution of the battery cell 100 is more uniform. For example, in some embodiments, the thermal conductivity of the thermal conductive member 30 or the thermal conductive portion 31 may be 210W/(m.K), 300W/(m.K), 350W/(m.K), 400W/(m.K), 500W/(m.K), or the like.

In some embodiments, the heat conducting member 30 or the heat conducting portion 31 may be graphene, diamond, or a heat pipe, and may have a higher thermal conductivity coefficient, so that the heat conducting effect of the heat conducting member 30 or the heat conducting portion 31 is better, heat on the battery cell 100 is conveniently conducted to the outside, and the temperature distribution of the battery cell 100 is ensured to be more uniform.

In some embodiments, the heat conducting member 30 or the heat conducting portion 31 may be a phase-change material structure, for example, the phase-change material structure is the heat conducting member 30, the phase-change material structure is a phase-change material member, the phase-change material member includes a base shell and a phase-change material located in the base shell, and if the phase-change material structure is the heat conducting portion 31, the phase-change material structure is a part of the housing 10, at this time, the base shell is formed on the housing 10, the phase-change material is located in the base shell, and the phase-change material in the phase-change material structure absorbs heat when reaching the working temperature, and changes from a solid state to a liquid state, so as to achieve absorption and storage of the heat. From this, adopt high coefficient of thermal conductivity's phase change material structure through heat-conducting piece 30 or heat conduction portion 31, can make the great regional radiating effect of electric core 100 calorific capacity better, let electric core 100 temperature distribution more even, avoid the great problem of the inside difference in temperature of electric core 100.

According to the utility model discloses battery package 200 includes according to the utility model discloses electric core 100 and heat transfer spare of embodiment.

Specifically, the battery cells 100 are multiple (two or more), the multiple battery cells 100 are stacked along the thickness direction (for example, the front-back direction shown in fig. 3) of the battery cells 100, so that the use requirement of the battery pack 200 can be met, and the heat exchange member is used for dissipating heat for the battery cells 100, so that the service life of the battery cells 100 is prolonged, and the operation reliability of the battery pack 200 is ensured. The heat exchange member may be a harmonica tube heat exchanger, but is not limited thereto.

For example, when the battery pack 200 is applied to a vehicle, the plurality of battery cells 100 are stacked in the thickness direction of the battery cells 100, that is, the plurality of battery cells 100 may be stacked in the direction from the head to the tail of the vehicle, so as to meet the required installation requirement.

Because according to the utility model discloses electric core 100 has above-mentioned profitable technological effect, consequently according to the utility model discloses battery package 200, the coefficient of heat conductivity that is equipped with heat conduction piece 30 and heat conduction piece 30 through the surface of casing 10 is greater than the coefficient of heat conductivity of casing 10, perhaps the part of casing 10 forms into heat conduction portion 31, the coefficient of heat conductivity of heat conduction portion 31 is greater than the coefficient of heat conductivity of the all the other parts of casing 10, heat conduction piece 30 or heat conduction portion 31 set up in the higher region of the local temperature of electric core body, make the heat of electric core body can dispel out through heat conduction piece 30 or heat conduction portion 31 fast, be favorable to the great regional heat transfer of electric core body calorific capacity, make the temperature distribution of electric core 100 more even, reduce the difference in temperature of electric core 100, be favorable to prolonging the life of electric core 100.

In some embodiments of the present invention, as shown in fig. 3, the heat exchanging member may be a cold plate 40, the cold plate 40 is disposed on one side of the electrical core 100 in the width direction (for example, the up-down direction shown in fig. 3), the structure of the cold plate 40 is simple, and the heat exchanging effect is good.

In addition, when the surface of casing 10 is equipped with heat conduction piece 30, heat conduction piece 30 can set up with the laminating of cold drawing 40, the coefficient of heat conductivity through heat conduction piece 30 is greater than the coefficient of heat conductivity of casing 10, can make too much heat on the electric core body transmit to the heat transfer ability of cold drawing 40 in order to strengthen cold drawing 40 through heat conduction piece 30, can increase the boiling heat transfer of cold drawing 40, can be equipped with the regional temperature reduction of heat conduction piece 30 rapidly, better heat transfer effect has, it is good to ensure electric core 100 radiating effect. Meanwhile, the area of the battery cell 100 facing the cold plate 40, where the thermal conductive member 30 is not disposed, may directly or indirectly contact the cold plate 40, so as to dissipate heat from other areas of the battery cell 100.

It can be understood that the heat conducting member 30 is attached to the cold plate 40, and the heat conducting member 30 may be directly attached to the cold plate 40, or the heat conducting member 30 may be indirectly attached to the cold plate 40 by sandwiching the heat conducting structural adhesive 50 or the heat conducting plate.

In some embodiments, two cold plates 40 may be provided, and the two cold plates 40 are respectively disposed on two sides of the width direction of the battery cell 100, so that the battery cell 100 can be effectively cooled, a good cooling effect is ensured, and the service life of the battery cell 100 is prolonged.

In some embodiments, as shown in fig. 1-4, the electrodes 20 are disposed at both ends of the housing 10 along the length direction of the housing 10, the heat-conducting members 30 are disposed at both ends of the housing 10, and the heat-conducting members 30 are attached to the cold plate 40. Under the high-power quick charge's of battery package 200 the condition or the during operation, the both ends of electricity core 100 can produce a large amount of heats, lead to the both ends high temperature of electricity core 100, can transmit the heat at casing 10 both ends to cold drawing 40 fast through two heat conduction pieces 30, in order to strengthen cold drawing 40's heat transfer ability, can be equipped with the regional temperature reduction of heat conduction piece 30 rapidly, cold drawing 40 can provide better heat transfer effect, make electricity core 100's temperature distribution more even, the difference in temperature of electricity core 100 has been reduced, the life-span of electricity core 100 has been prolonged.

According to some embodiments of the present invention, as shown in fig. 3, a heat conducting structural adhesive 50 is disposed between the cold plate 40 and the plurality of battery cells 100. From this, cold plate 40 glues 50 through the heat conduction structure and can better laminate with electric core 100, is favorable to improving the heat-conduction effect between cold plate 40 and the electric core 100, better with electric core 100's heat transfer to cold plate 40 on, realize guaranteeing battery package 200 operational reliability to electric core 100's heat dissipation.

According to the utility model discloses thermal management system includes the refrigeration circuit and according to the utility model discloses battery package 200. The heat exchange piece is provided with a refrigerant channel, the heat exchange piece is connected in the refrigerating circuit, and circulating cooling of the heat exchange piece can be realized through circulating flow of a refrigerant in the refrigerating circuit, so that heat transferred to the heat exchange piece from the battery cell 100 can be taken out of the battery pack 200, and a good heat exchange effect can be provided.

For example, the refrigeration circuit may be a refrigeration circuit of an air conditioning system of a vehicle, and the heat exchange member may be used as an evaporator, so that a refrigerant flows in the refrigerant channel, and the battery cell 100 is cooled by evaporation of the refrigerant, which is beneficial to improving the cooling effect of the battery cell 100. Meanwhile, through the mixed cooling management mode of combining the heat conducting piece 30 or the heat conducting part 31 with the heat exchange piece, the problem that the local part of the battery pack 200 is cooled by increasing the power of the compressor is avoided, so that a refrigerant with a larger flow is prevented from being introduced into a refrigerant channel, and the energy conservation of the whole vehicle is facilitated. Wherein, the heat exchange piece is a direct cooling heat exchanger.

Because according to the utility model discloses battery package 200 has above-mentioned profitable technological effect, consequently, according to the utility model discloses the thermal management system, the surface through casing 10 is equipped with heat-conducting piece 30 and the coefficient of heat conductivity of heat-conducting piece 30 is greater than the coefficient of heat conductivity of casing 10, perhaps the part of casing 10 forms into heat-conducting part 31, the coefficient of heat conductivity of heat-conducting part 31 is greater than the coefficient of heat conductivity of all the other parts of casing 10, heat-conducting piece 30 or heat-conducting part 31 set up in the higher region of the local temperature of electricity core body, make the heat of electricity core body can be dispelled out through heat-conducting piece 30 or heat-conducting part 31 fast, be favorable to the great regional heat transfer of electricity core body calorific capacity, make the temperature distribution of electricity core 100 more even, reduce the difference in temperature of electricity core 100, be favorable to prolonging the life of electricity core 100.

In some embodiments in which the heat exchange member is a cold plate 40, as shown in fig. 3 and fig. 5, a connector 43 is disposed on the cold plate 40, and a refrigerant inlet 41 and a refrigerant outlet 42 are disposed on the connector 43, so that the refrigerant can enter the refrigerant channel of the cold plate 40 through the refrigerant inlet 41 and flow out through the refrigerant outlet 42, and the heat of the battery cell 100 can be taken out of the battery pack 200 through the cooling of the refrigerant circulating in the cold plate 40, thereby facilitating the cooling of the battery cell 100.

In addition, the refrigerant inlet 41 and the refrigerant outlet 42 may be disposed on the same side of the cold plate 40, which facilitates connection between the refrigerant inlet 41 and the refrigerant outlet 42 and other pipelines, so that the connection is more convenient. For example, the refrigerant inlet 41 and the refrigerant outlet 42 may be disposed on a side of the cold plate 40 near a vehicle head direction (e.g., a front side as viewed in fig. 3).

According to the utility model discloses vehicle includes according to the utility model discloses heat management system. Because according to the utility model discloses heat management system has above-mentioned profitable technological effect, consequently according to the utility model discloses the vehicle, the surface through casing 10 is equipped with heat conduction piece 30 and the coefficient of heat conduction piece 30 is greater than the coefficient of heat conduction of casing 10, perhaps the part of casing 10 forms into heat conduction portion 31, the coefficient of heat conduction portion 31 is greater than the coefficient of heat conduction of the all the other parts of casing 10, heat conduction piece 30 or heat conduction portion 31 set up in the higher region of the local temperature of electric core body, make the heat of electric core body can be through heat conduction piece 30 or heat conduction portion 31 effluvium fast, be favorable to the heat transfer in the great region of electric core body calorific capacity, make the temperature distribution of electric core 100 more even, reduce the difference in temperature of electric core 100, be favorable to prolonging the life of electric core 100.

Other constructions and operations of the battery cell 100, the battery pack 200, the thermal management system, and the vehicle according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the terms "embodiment," "specific embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A battery cell, comprising:

a housing;

the battery cell comprises a battery cell body, wherein the battery cell body is arranged in the shell, the outer surface of the shell is provided with a heat conducting piece, the heat conductivity coefficient of the heat conducting piece is larger than that of the shell, or the part of the shell is a heat conducting part, and the heat conductivity coefficient of the heat conducting part is larger than that of the rest part of the shell.

2. The battery cell of claim 1, wherein at least one of two ends of the casing is provided with an electrode connected to the battery cell body along a length direction of the casing, and the heat conducting part or the heat conducting member is provided at the end of the casing where the electrode is provided.

3. The electrical core of claim 2, wherein the electrodes are disposed at both ends of the casing along a length direction of the casing, and the heat conducting portion or the heat conducting member is disposed at both ends of the casing.

4. The electrical core of claim 2 or 3, wherein the thermally conductive member or portion comprises:

an end portion located on an end surface of one end of the case in a length direction, the end portion being provided with the electrode;

an annular portion having an axial end connected to the end portion.

5. The electrical core of claim 1, wherein when the portion of the casing is formed as a thermal conductor, the thermal conductor is integral with the remainder of the casing.

6. The electrical core of claim 1, wherein the thermally conductive member or portion is a phase change material structure.

7. A battery pack, comprising:

the battery cell of any of claims 1-5, wherein the battery cell is in a plurality, and the plurality of battery cells are stacked in a thickness direction of the battery cell;

and the heat exchange piece is used for dissipating heat of the battery cell.

8. The battery pack of claim 7, wherein the heat exchange member is a cold plate, the cold plate is disposed on one side of the battery cell in the width direction, and when the outer surface of the casing is provided with the heat conduction member, the heat conduction member is attached to the cold plate.

9. The battery pack of claim 8, wherein a thermally conductive structural adhesive is disposed between the cold plate and the plurality of cells.

10. A thermal management system, comprising:

a refrigeration circuit;

the battery pack according to any one of claims 7 to 9, wherein the heat exchanger has a refrigerant passage, and the heat exchanger is connected to the refrigeration circuit.

11. A vehicle comprising a thermal management system according to claim 10.

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