CN213401318U

CN213401318U - Heating unit for battery, battery and power utilization device

Info

Publication number: CN213401318U
Application number: CN202021773041.1U
Authority: CN
Inventors: 魏士飞; 李清
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-06-08
Anticipated expiration: 2030-08-21

Abstract

The utility model provides a heating unit, a battery and an electric device for the battery, which relate to the technical field of batteries and are used for solving the technical problem that the heating component fails due to dry burning of the heating component; the heating component is provided with a plurality of heating areas, and at least a plurality of heating areas are attached to the heat conduction supporting piece to form surface contact; heat conduction support piece has the first surface that deviates from the heating region, and heat conduction support piece has the second surface of laminating heating region, and at least one surface in first surface and the second surface has a plurality ofly and the corresponding first arc portion of heating region, and the shape of each first arc portion all is used for the partial outer peripheral face phase-match with a cylinder electricity core to the heat transfer that produces the heating member gives the cylinder electricity core, the utility model provides a heating unit for battery is arranged in the battery, the utility model provides a battery is arranged in with the electrical apparatus.

Description

Heating unit for battery, battery and power utilization device

Technical Field

The utility model relates to a battery technology field especially relates to a heating unit, battery and power consumption device for battery.

Background

The battery is a product formed by combining battery cores in a series and/or parallel mode and additionally installing a single battery monitoring and heat management device. The battery can be formed by combining square cells, cylindrical cells or soft package cells.

The conventional battery formed by cylindrical battery cells comprises a plurality of cylindrical battery cells arranged in rows and/or columns and a heating member arranged between two adjacent rows or two adjacent columns, wherein the heating member is a thermal management device of the battery. Line contact is formed between the heating component and the cylindrical battery core, the cylindrical battery core is heated by the heating component, the temperature of the battery can be rapidly increased at a low temperature, and the charging efficiency is improved.

However, the heating member is in line contact with the cylindrical cell, and there is a case where a portion of the heating member not in contact with the cylindrical cell is dried, which may cause the heating member to fail or cause a safety problem.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the embodiments of the present invention provide a heating unit for a battery, a battery and an electric device, which are used to reduce the probability of failure of a heating member caused by dry burning of the heating member.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

a first aspect of embodiments of the present invention provides a heating unit for a battery, comprising a thermally conductive support and a heating member; the heating component is provided with a plurality of heating areas, and at least a plurality of heating areas are attached to the heat conduction supporting piece to form surface contact; the heat conduction support piece is provided with a first surface deviating from the heating region, the heat conduction support piece is provided with a second surface fitting the heating region, at least one of the first surface and the second surface is provided with a plurality of first arc-shaped parts corresponding to the heating region, and the shape of each first arc-shaped part is matched with the partial outer peripheral surface of one cylindrical battery cell so as to transfer heat generated by the heating component to the cylindrical battery cell.

Compared with the prior art, the embodiment of the utility model provides a heating element for battery has following advantage:

in the heating unit for a battery according to the embodiment of the present invention, the heating member has a plurality of heating regions, at least the plurality of heating regions are attached to the heat-conducting supporting member to form a surface contact, and at least one of the first surface and the second surface of the heat-conducting supporting member has a plurality of first arc-shaped portions, each of the first arc-shaped portions has a shape adapted to match with a partial outer peripheral surface of a cylindrical battery cell, when the first surface of the heat-conducting supporting member facing away from the heating regions has a plurality of first arc-shaped portions, the heat generated by the heating member is firstly transferred to the heat-conducting supporting member, the heat transferred to the heat-conducting supporting member is then transferred to the cylindrical battery cell, when the second surface of the heat-conducting supporting member attached to the heating regions has a plurality of first arc-shaped portions, the heat generated by the heating regions is directly transferred to the cylindrical battery cell, so that the heating member heats the cylindrical battery cell, thereby effectively reducing the probability of heating element failure caused by dry burning of the heating element and simultaneously improving the use safety.

In a possible embodiment, the heating member further comprises a transition region between each adjacent two of the plurality of heating regions, the transition region and the heating regions together being in face contact with the thermally conductive support.

In a possible embodiment, the heating member comprises at least one first heating section and at least two second heating sections, the first heating section and the second heating section are arranged at intervals and are connected end to end, and every two adjacent second heating sections in the at least two second heating sections are arranged oppositely.

In a possible embodiment, each second heating segment faces away from the surface of the other second heating segment, and the surface of each second heating segment facing the other second heating segment is in face contact with the corresponding heat-conducting support.

In a possible embodiment, each second heating section comprises a laminating section and a non-laminating section arranged at one end of the laminating section; the attaching section comprises heating areas and transition areas which are arranged at intervals, and the attaching section is attached to the heat conduction supporting piece to form surface contact; the non-joint section at least comprises a transition area, and the non-joint section is used for being jointed with the cylindrical battery core.

In a possible embodiment, the contact area formed by the attached section and the heat-conducting support member is larger than the contact area formed by the non-attached section and the cylindrical battery cell.

In a possible embodiment, each second heating section is in surface contact with a plurality of heat conducting supporting members at the same time, the plurality of heat conducting supporting members are arranged in the same layer and are sequentially arranged along the surface of the second heating section, or each second heating section is in surface contact with one heat conducting supporting member.

In a possible embodiment, a conductor is arranged in the first heating section, and a heating wire is arranged in the second heating section, and the conductor is electrically connected to the heating wire, wherein the resistance of the conductor is smaller than the resistance of the heating wire.

In a possible embodiment, the surface of the heat-conducting support member on which the first arc-shaped portion is disposed is further provided with a second arc-shaped portion, the protruding direction of the second arc-shaped portion disposed on the same surface of the heat-conducting support member is opposite to the protruding direction of the first arc-shaped portion, and the second arc-shaped portion and the first arc-shaped portion are arranged at intervals to form a wavy shape.

In a possible embodiment, the material of the thermally conductive support is aluminum or copper.

A second aspect of the embodiments of the present invention provides a battery, comprising a plurality of cylindrical cells and a heating unit for the battery in any of the above possible embodiments, wherein a portion of one of the cylindrical cells is accommodated in one of the first arc-shaped portions of the thermally conductive support member.

A third aspect of the embodiments of the present invention provides an electric device, which includes the above battery.

A fourth aspect of the embodiments of the present invention provides a method for manufacturing a battery, including the steps of: bonding the heating member and a heat conduction support member with a plurality of first arc-shaped parts together, and at least enabling a heating area of the heating member to be in surface contact with the heat conduction support member; a portion of a cylindrical cell is received within a first arcuate portion of the thermally conductive support member.

In addition to the technical problems, technical features constituting technical solutions, and advantageous effects brought by the technical features of the technical solutions described above, other technical problems that can be solved by the heating unit for a battery, the battery, and the power consumption device provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be further described in detail in the detailed description of the embodiments of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 an electric device according to an embodiment of the present invention;

fig. 2 is a schematic view of a first view structure of a battery according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a second view structure of a battery according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a third view structure of a battery according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a heating unit for a battery according to an embodiment of the present invention;

fig. 6 is an exploded view of a heating unit for a battery according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a heating member according to an embodiment of the present invention;

FIG. 8 is a first perspective internal view of the heating member of FIG. 7;

fig. 9 is a second perspective internal view of the heating member of fig. 7.

Description of reference numerals:

1-heating unit for batteries

11-a thermally conductive support;

111-a first arc;

112-a second arc;

12-a heating member;

121-a first heating section;

122-a second heating section;

123-heating zone;

124-a transition region;

125-connector;

126-a fitting section;

127-non-conforming segment;

2-a vehicle;

21-a controller;

22-a motor;

23-a battery;

231-cylindrical cells;

232-a housing;

2321-bottom case;

2322-case cover.

Detailed Description

In order to make the above objects, features and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of 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 indicated based on 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; 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 invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

In the description of the present specification, reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" or the like means 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 present invention. In this specification, schematic representations of the above terms 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.

The conventional battery comprises a plurality of cylindrical battery cells arranged in rows and/or columns, and a heating member arranged between two adjacent rows or two adjacent columns. The heating component is provided with an insulating part, the contact area of the heating component and the cylindrical battery core is small, the part of the heating component which is not in contact with the cylindrical battery core has the condition of dry burning, and the dry burning refers to the phenomenon that the local area on the heating component has overhigh temperature and the overhigh temperature causes the damage of the heating component. During dry burning, the surface temperature of a local area on the heating member can reach more than 200 ℃, and the dry burning can cause the insulating part on the heating member to lose efficacy, so that the heating member fails, and safety risk is generated; in addition, the outer peripheral face of cylinder electricity core is provided with the blue membrane that has insulating effect, and when the heating member dry combustion method, also can make the blue membrane on the cylinder electricity core become invalid, also promptly, the inside insulation failure of battery, the security of battery reduces. It is worth noting that in the battery, the contact area between the heating component and the cylindrical battery core is small, and the heating performance of the heating component on the cylindrical battery core is poor.

In order to solve the problem of failure of the heating component caused by dry burning of the heating component and even the problem of failure of the insulation inside the battery, the utility model provides a heating unit for the battery, by arranging a heat conduction support piece on the surface of the heating component departing from the cylindrical battery core, and making the heating area of the heating component in surface contact with the heat conduction support piece, meanwhile, arranging a first arc part on the first surface of the heat conduction support piece facing the heating component, so that the contact area between the heating component and the outer peripheral surface of the cylindrical battery core is increased under the extrusion action of the first arc part of the heat conduction support piece, or arranging a heat conduction support piece between the cylindrical battery core and the heating component, and making the heating area of the heating component in surface contact with the heat conduction support piece, meanwhile, arranging a first arc part on the second surface of the heat conduction support piece departing from the heating component, the contact area between the first arc part and the outer, so, effectively reduce the probability that the heating member burns futilely, and then reduce the probability that the heating member became invalid and the probability that the inside insulation of battery became invalid, promote the heating performance of heating member to cylinder electricity core simultaneously.

The utility model also provides a battery, the utility model discloses a battery has used the utility model provides a heating element for battery. The battery described in the present invention is suitable for electric devices such as mobile phones, portable devices, notebook computers, battery cars, electric automobiles, ships, spacecraft, electric toys, electric tools, and the like, wherein the spacecraft is, for example, an airplane, a rocket, a space plane, a spacecraft, and the like, the electric toys include, for example, stationary or mobile electric toys, specifically, for example, game machines, electric automobile toys, electric ship toys, electric airplane toys, and the like, the electric tools include, for example, metal cutting electric tools, grinding electric tools, assembly electric tools, and electric tools for railways, specifically, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planes.

The battery described in the present invention is not limited to be used in the above described electric device, but for the simplicity of description, the following embodiments all use the electric vehicle as an example for explanation.

Fig. 1 is a simplified schematic diagram of a vehicle 2 according to the present embodiment. The vehicle 2 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. The battery 23 may be provided inside the vehicle 2, and specifically, the battery 23 may be provided, for example, at the bottom or the front or rear of the vehicle 2. The battery 23 may be used for power supply of the vehicle 2, and for example, the battery may serve as an operation power source of the vehicle 2. The vehicle 2 may also include a controller 21 and a motor 22, the controller 21 being used, for example, to control a battery 23 to power the motor 22. The battery 23 may be used for starting, navigating and the like of the vehicle 2, and of course, the battery 23 may also be used for driving the vehicle 2 to run, instead of or partially replacing fuel oil or natural gas to provide driving power for the vehicle 2.

The battery mentioned in this embodiment may be a battery module or a battery pack, etc., and the basic structural units of the battery module and the battery pack are battery cells, and a plurality of battery cells may be connected in series and/or in parallel via electrode terminals to be applied to various electric devices. Among them, the battery module is to protect the battery cells from external impact, heat, vibration, etc., and is formed by electrically coupling a certain number of battery cells together and putting them in a frame. The battery pack is the final state of the battery system installed in the electric vehicle. Most battery packs today are made by assembling various control and protection systems, such as battery management systems, thermal management components, etc., on one or more battery modules. As technology develops, this level of battery modules may be omitted, i.e., battery packs are formed directly from battery cells. The improvement leads the weight energy density and the volume energy density of the battery system to be improved, and simultaneously, the number of parts is obviously reduced.

As shown in fig. 2, 3 and 4, the battery 23 provided in the present embodiment includes a plurality of cylindrical cells 231 and the heating unit 1 for a battery provided in the present embodiment, and a portion of one cylindrical cell 231 is accommodated in one first arc-shaped portion of the thermally conductive support member 11. In the battery 23 of the present embodiment, in addition to the cylindrical cell 231, a square cell may be provided, in which the heating unit 1 for a battery heats the cylindrical cell 231 therein. The battery cell formed by the cylindrical cell 231 or the square cell includes a positive electrode plate, a negative electrode plate, an electrolyte and a separator. The battery 23 further includes a casing 232, the casing 232 includes a bottom shell 2321 and a shell cover 2322, the bottom shell 2321 is provided with a mounting cavity with an opening at the top, the shell cover 2322 is covered at the opening of the mounting cavity, and the heating unit 1 and the cylindrical electrical core 231 for the battery are mounted in the mounting cavity so as to protect the heating unit 1 and the cylindrical electrical core 231 for the battery.

The heating unit for the battery of the embodiment is used for heating the battery composed of the cylindrical battery cores. Of course, it is also possible to heat a battery formed jointly from a cylindrical cell and a square cell, in which case the heating unit heats, for example, only the cylindrical cell.

As shown in fig. 2, 5 and 8, the heating unit 1 for a battery of the present embodiment mainly includes a heat conducting support 11 and a heating member 12, the heating member 12 may be, for example, a silicon rubber electric heating plate, an electric heating film, or other components that can heat the cylindrical battery cell 231 and have an insulating property, and the heating member 12 may be, for example, a heating wire disposed inside the heating member 12, and an insulating layer for realizing insulation is wrapped outside the heating wire. Wherein, the heating member 12 can be divided into a heating region 123 and a transition region 124 according to the size of the heat generated by the unit area, wherein, in the heating region 123, the heating wires can be arranged in a manner similar to a labyrinth manner, an S-shaped circuitous manner, etc., so that in the heating region 123, the total length of the heating wires of the unit area is longer, the heat generated by the unit area of the heating region 123 is large, and then the cylindrical battery cell 231 is effectively heated, correspondingly, in the transition region 124, the total length of the heating wires of the unit area is shorter, so as to reduce the energy loss. The heating member 12 has a plurality of heating regions 123, and at least the plurality of heating regions 123 are attached to the heat-conducting supporting member 11 to form a surface contact, so that the heat generated by the heating member 12 is timely transferred to the heat-conducting supporting member 11.

As shown in fig. 3 and fig. 6, in the heating unit 1 for a battery of the present embodiment, a first surface of the heat-conducting support 11 facing away from the heating region 123 has a plurality of first arc-shaped portions 111 corresponding to the heating region 123, the first arc-shaped portions 111 protrude toward the heating member 12, each first arc-shaped portion 111 has a shape adapted to match with a shape of a portion of an outer peripheral surface of one cylindrical cell 231, the first arc-shaped portion 111 may be, for example, an arc, and each first arc-shaped portion 111 accommodates a portion of the cylindrical cell 231 therein, so that a surface contact with a larger contact area is formed between the first arc-shaped portion 111 and the cylindrical cell 231, and then heat generated by the heating member 12 is timely transferred to the cylindrical cell 231 through the heat-conducting support 11.

In the heating unit 1 for a battery of the present embodiment, the heat generated by the heating member 12 is firstly transferred to the heat-conducting support 11, and the heat transferred to the heat-conducting support 11 is then transferred to the cylindrical cell 231, so that the heating member 12 heats the cylindrical cell 231; heating region 123 and heat conduction support piece 11 of heating member 12 form the face contact, first arc portion 111 and the outer peripheral face of cylinder electricity core 231 of heat conduction support piece 11 also form the face contact, the heat that produces on the heating member 12 is in time effectual to be transmitted to heat conduction support piece 11, heat of heat conduction support piece 11 is in time effectual to be transmitted to cylinder electricity core 231 again, so, effectively reduce heating region 123 of heating member 12 and take place the possibility of dry combustion method, and then effectively reduce the probability that heating member 12 dry combustion method leads to heating member 12 to become invalid and the probability of the inside insulation failure of battery 23, and promote the heating performance of heating member 12 to cylinder electricity core 231.

In the heating unit 1 for a battery of this embodiment, the second surface of the heat-conducting support 11 attached to the heating region 123 has a plurality of first arc-shaped portions 111 corresponding to the heating region 123, the first arc-shaped portions 111 protrude in a direction away from the heating member 12, each of the first arc-shaped portions 111 is shaped to match with a shape of a part of the outer peripheral surface of one cylindrical battery cell 231, the first arc-shaped portions 111 may be circular arcs, for example, the heating member 12 forms a surface contact with the cylindrical battery cell 231 with a large contact area under the pressing action of the first arc-shaped portions 111 of the heat-conducting support 11, and heat generated by the heating member 12 is timely transferred to the cylindrical battery cell 231.

In the heating unit 1 for a battery of the present embodiment, the heating region 123 of the heating member 12 forms a surface contact with the heat conducting support 11, the first arc-shaped portion 111 of the heat conducting support 11 matches with the outer peripheral surface of the cylindrical battery cell 231, the heating member 12 forms a surface contact with the outer peripheral surface of the cylindrical battery cell 231 under the extrusion action of the heat conducting support 1, and heat generated by the heating member 12 is timely and effectively transferred to the cylindrical battery cell 231, so that the possibility of dry burning of the heating region 123 of the heating member 12 is effectively reduced, the probability of failure of the heating member 12 due to dry burning of the heating member 12 and the probability of insulation failure inside the battery 23 are further effectively reduced, and meanwhile, the heating performance of the heating member 12 on the cylindrical battery cell 231 is improved.

In some embodiments, a plurality of first arc portions 111 corresponding to the heating region 123 are disposed on a first surface of the heat conducting support 11 facing away from the heating region 123, and a plurality of first arc portions 111 corresponding to the heating region 123 are disposed on a second surface of the heat conducting support 11 facing the heating region 123, at this time, a cylindrical battery cell 231 may be disposed on one side of the heat conducting support 11 facing away from the heating member 12 and one side of the heating member 12 facing away from the heat conducting support 11.

As shown in fig. 6 and 8, the transition region 124 is located between every two adjacent heating regions 123 in the plurality of heating regions 123, and the transition region 124 and the heating regions 123 are simultaneously attached to the heat-conducting support 11 to form surface contact. The heat conduction support piece 11 is attached to the transition region 124 and the heating region 123 of the heating member 12 at the same time to form surface contact, so that the attaching difficulty of the heat conduction support piece 11 and the heating member 12 can be reduced, the process difficulty is reduced, and the assembly efficiency is improved. In a specific embodiment, an adhesive is disposed on a surface of the heating member 12, which is attached to the heat-conducting support 11, and the adhesive has characteristics of high temperature resistance and easy heat conduction.

In some embodiments, heating member 12 includes at least one first heating section 121 and at least two second heating sections 122, first heating section 121 and second heating section 122 are disposed at intervals and end-to-end, and every two adjacent second heating sections 122 of the at least two second heating sections 122 are disposed oppositely, i.e., first heating section 121 and second heating section 122 are arranged in a generally S-shaped serpentine manner. In these embodiments, the first heating section 121 and the second heating section 122 are disposed at an interval and end-to-end, and every two adjacent second heating sections 122 of the at least two second heating sections 122 are disposed oppositely, so as to facilitate heating the plurality of cylindrical cells 231 simultaneously, improve the heating efficiency, reduce the number of parts, and facilitate the assembly of the heating member 12 and the plurality of cylindrical cells 231. It should be noted that, in the battery 23 composed of the heating unit 1 for a battery and the cylindrical cells 231 of the embodiment, the cylindrical cells 231 located in the middle region of the battery 23 have high temperature due to slow heat dissipation, and the cylindrical cells 231 located around the battery 23 have low temperature due to fast heat dissipation, so that the heat-conducting support member 11 has excellent heat-conducting performance, and thus, the heat-conducting support member 11 can also balance the temperature among multiple rows or multiple rows of the cylindrical cells 231.

In the embodiment of the heating unit 1 for a battery as shown in fig. 4 and 6, the heating member 12 includes a first heating section 121, and two second heating sections 122 disposed at both ends of the first heating section 121, the two second heating sections 122 being disposed opposite to each other, i.e., the heating member 12 is formed in a U-shaped structure by one first heating section 121 and two second heating sections 122. In this structure, the heating member 12 may heat three rows or three columns of cylindrical cells 231 at the same time to improve the heating efficiency, wherein the cylindrical cells 231 in the middle row or one column are disposed between the two second heating sections 122, and the other two rows or two columns of cylindrical cells 231 are disposed on the first surfaces of the two heat-conducting supporting members 11 facing away from the second heating sections 122 attached thereto. In some embodiments, the surface of the heating member 12 that fits the heat conducting support 11, and the surface of the heating member 12 that faces away from the heat conducting support 11 are provided with adhesive glue. In some embodiments, each second heating section 122 is provided with a heating region 123 and a transition region 124 at intervals, and a surface of each second heating section 122 facing away from another second heating section 122 is in close face contact with the corresponding heat-conducting support 11.

In some embodiments, a wire is disposed in the first heating section 121, a heating wire is disposed in the second heating section 122, the resistance of the wire is less than that of the heating wire, the heat generated by the first heating section 121 where the wire is located is less than that generated by the second heating section 122 where the heating wire is located, and the wire is connected to the heating wire. The first heating section 121 reduces the probability of dry burning of the first heat conductive supporting member 11 by directly reducing the amount of heat generated by itself, thus improving the heating efficiency and the safety in use.

It should be noted that, the heating unit 1 for a battery of the present embodiment can reduce the probability of dry burning of the heating member 12 through two concepts, the first is to arrange the heat conductive supporting member 11 on the second heating section 122 to increase the contact area, and the second is to limit the resistance of the wire of the first heating section 121 to be smaller than the resistance of the heating wire to reduce the heat generated by itself.

In some embodiments, each second heating section 122 is in surface contact with one heat conduction support 11, so that the assembly difficulty of the heat conduction support 11 and the second heating section 122 is reduced, and the assembly efficiency is improved. In other embodiments, each second heating section 122 forms a surface contact with a plurality of heat conducting supporting members 11 at the same time, the plurality of heat conducting supporting members 11 are disposed in the same layer and sequentially arranged along the surface of the second heating section 122, at this time, each heat conducting supporting member 11 can be attached to one heating region 123 on the second heating section 122, so that the modular manufacturing of the heat conducting supporting members 11 can be realized, and heating members 12 with various lengths can be used.

In some embodiments, a surface of each second heating segment 122 facing away from another second heating segment 122, and a surface of each second heating segment 122 facing toward another second heating segment 122 are in close contact with the corresponding heat-conducting support 11 to form a surface contact, that is, two sides of the second heating segment 122 facing away are provided with the heat-conducting supports 11. The probability of dry burning of the second heating section 122 can be further effectively reduced by adhering the surface of each second heating section 122 away from the other second heating section 122 and the surface of each second heating section 122 facing the other second heating section 122 to the corresponding heat-conducting support 11 to form surface contact.

As shown in fig. 7, the heating member 12 in this embodiment further includes a connector 125 connected to the heating wire, and the connector 125 transmits part of the electric energy in the cylindrical battery cell 231 to the conducting wire and the heating wire in the heating member 12, for example, to supply power to the conducting wire and the heating wire.

As shown in fig. 6 and 9, the surface of the heat conducting support 11 on which the first arc-shaped portion 111 is disposed is further provided with a second arc-shaped portion 112, the protruding direction of the second arc-shaped portion 112 is opposite to the protruding direction of the first arc-shaped portion 111, and the second arc-shaped portion 112 and the first arc-shaped portion 111 are disposed at intervals to form a wave shape. It is noted that the protruding direction of the second arc-shaped portion 112 is opposite to the protruding direction of the first arc-shaped portion 111, which means that the second arc-shaped portion 112 and the first arc-shaped portion 111 are disposed on the same surface of the heat conductive support 11. Wherein the surface of the heat-conducting support 11 on which the first arc-shaped portion 111 is provided is also provided with a second arc-shaped portion 112, which means, when the heat conductive support 11 is provided with the first arc-shaped part 111 facing away from the first surface of the heating region 123, the first surface of the heat-conducting support 11 facing away from the heating zone 123 is also provided with a second arc-shaped portion 112, when the second surface of the heat conductive support 11 attached to the heating member 12 is provided with the first arc-shaped portion 111, the second surface of the heat conductive support 11 that abuts the heating member 12 is also provided with a second arc-shaped portion 112, when both the first surface of the heat conductive support 11 facing away from the heating region 123 and the second surface of the heat conductive support 11 abutting the heating member 12 are provided with the first arc-shaped portion 111, a first surface of the heat conducting support 11 facing away from the heating area 123 and a second surface of the heat conducting support 11 abutting the heating member 12 are also provided with a second arc-shaped portion 112. In the actual manufacturing process, the thermally conductive support 11 is formed in one step, for example by stamping.

As shown in fig. 6 and 8, each second heating section 122 includes a conforming section 126 and a non-conforming section 127 disposed at one end of conforming section 126; the attaching section 126 comprises a heating region 123 and a transition region 124 which are arranged at intervals, and the attaching section 126 is attached to the heat-conducting support member 11 to form surface contact; the non-attachment section 127 includes at least one transition region 124, and the non-attachment section 127 is adapted to attach to the cylindrical core 231. Optionally, the contact area formed by the attaching section 126 and the heat-conducting support 11 is larger than the contact area formed by the non-attaching section 127 and the cylindrical battery core 231. It should be noted that the attaching section 126 and the non-attaching section 127 are divided by whether the second heating section 122 is attached to the heat conductive supporting member 11 or not in the length direction of the second heating section 122. Through setting up heat conduction support piece 11 at laminating section 126, do not set up heat conduction support piece 11 at non-laminating section 127, can effectively reduce when laminating section 126 probability of dry combustion appears, reduce heat conduction support piece 11's material cost.

The embodiment also provides a preparation method of the battery, which comprises the following steps:

bonding the heating member and a heat conduction support member with a plurality of first arc-shaped parts together, and at least enabling a heating area of the heating member to be in surface contact with the heat conduction support member;

a portion of a cylindrical cell is received within a first arcuate portion of the thermally conductive support member.

The preparation method of the battery provided by the disclosure can be at least used for preparing the battery.

In the method for manufacturing a battery of this embodiment, the heating member is bonded to the heat-conducting support member, and a portion of the cylindrical electrical core is accommodated in the first arc-shaped portion of the heat-conducting support member, for example, adhesives may be disposed on the surface of the heating member bonded to the heat-conducting support member and the surface of the heating member away from the heat-conducting support member, or adhesives may be disposed on the surface of the heating member bonded to the heat-conducting support member and the first surface of the heat-conducting support member away from the heating member, so as to bond the heating member and the heat-conducting support member together first, and bond the heating member and the heat-conducting support member together with the cylindrical electrical core.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A heating unit (1) for batteries, characterized by comprising a thermally conductive support (11) and a heating member (12);

the heating component (12) is provided with a plurality of heating areas (123), and at least the plurality of heating areas (123) are attached to the heat-conducting support (11) to form surface contact;

the heat conduction support piece (11) is provided with a first surface facing away from the heating area (123), the heat conduction support piece (11) is provided with a second surface attached to the heating area (123), at least one of the first surface and the second surface is provided with a plurality of first arc-shaped parts (111) corresponding to the heating area (123), and the shape of each first arc-shaped part (111) is matched with part of the outer peripheral surface of one cylindrical battery cell (231) so as to transfer heat generated by the heating member (12) to the cylindrical battery cell (231).

2. The heating unit (1) for batteries according to claim 1, characterized in that said heating member (12) further comprises a transition region (124) between each two adjacent heating regions (123) of said plurality of heating regions (123), said transition region (124) and said heating regions (123) being jointly conformed in face contact with said heat-conducting support (11).

3. The heating unit (1) for batteries according to claim 2, characterized in that said heating member (12) comprises at least one first heating segment (121) and at least two second heating segments (122), said first heating segment (121) and said second heating segments (122) being arranged at intervals and end-to-end, and every two adjacent second heating segments (122) of said at least two second heating segments (122) being arranged opposite.

4. Heating unit (1) for batteries according to claim 3,

each second heating section (122) faces away from the surface of the other second heating section (122), and the surface of each second heating section (122) facing the other second heating section (122) is in fit surface contact with the corresponding heat-conducting support member (11).

5. The heating unit (1) for batteries according to claim 3, characterized in that each of said second heating segments (122) comprises a conforming segment (126) and a non-conforming segment (127) disposed at one end of said conforming segment (126);

the attaching section (126) comprises heating regions (123) and transition regions (124) which are arranged at intervals, and the attaching section (126) is attached to the heat-conducting support member (11) to form surface contact;

the non-attaching section (127) at least comprises a transition area (124), and the non-attaching section (127) is used for attaching the cylindrical battery core (231).

6. Heating unit (1) for batteries according to claim 5, characterized in that said conformed segment (126) forms a contact area with said thermally conductive support (11) that is greater than the contact area formed by said non-conformed segment (127) with said cylindrical electric core (231).

7. The heating unit (1) for batteries according to claim 3, characterized in that each of said second heating segments (122) is simultaneously brought into surface contact with a plurality of said heat-conducting supports (11), a plurality of said heat-conducting supports (11) being arranged in layers and arranged in sequence along the surface of said second heating segment (122), or each of said second heating segments (122) is brought into surface contact with one of said heat-conducting supports (11).

8. The heating unit (1) for batteries according to claim 3, characterized in that a wire is arranged in the first heating section (121) and a heating wire is arranged in the second heating section (122), the wire being electrically connected to the heating wire, wherein the resistance of the wire is smaller than the resistance of the heating wire.

9. The heating unit (1) for batteries according to any of claims 1 to 8, characterized in that the surface of the heat conducting support (11) where the first arc-shaped part (111) is arranged is further provided with a second arc-shaped part (112), the protruding direction of the second arc-shaped part (112) arranged on the same surface of the heat conducting support (11) is opposite to the protruding direction of the first arc-shaped part (111), and the second arc-shaped part (112) and the first arc-shaped part (111) are arranged at intervals to form a wave shape.

10. Heating unit (1) for batteries according to any of claims 1 to 8, characterized in that the material of the thermally conductive support (11) is aluminium or copper.

11. A battery (23), comprising a plurality of cylindrical cells (231) and a heating unit (1) for a battery according to any one of claims 1 to 10, a first arc-shaped portion (111) of said thermally conductive support (11) housing a portion of one of said cylindrical cells (231).

12. An electric consumer, characterized in that it comprises a battery (23) according to claim 11.