CN216250898U

CN216250898U - Battery heating mechanism

Info

Publication number: CN216250898U
Application number: CN202122815501.3U
Authority: CN
Inventors: 洪木南
Original assignee: Suzhou Ruili Iot Technology Co ltd
Current assignee: Suzhou Ruili Iot Technology Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-04-08
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses a battery heating mechanism which comprises a heating component and a bus bar, wherein the heating component is provided with a heating piece, the bus bar is connected to a pole of a battery, and the bus bar is in heat conduction connection with the heating piece; this battery heating mechanism does not occupy the battery inner space through set up the heating source in electric core utmost point post position, has controlled the volume of battery module, has promoted the energy density of battery module to this battery heating mechanism's simple structure, manufacturing cost is lower.

Description

Battery heating mechanism

Technical Field

The utility model relates to the technical field of battery production, in particular to a cylindrical battery heating mechanism.

Background

With the wide use of lithium ion batteries, the heating modes for different types of batteries are different, and a common mode is to apply a heat source to the bottom surface or the side surface of a battery core to realize a heating function; for various types of lithium ion cells, a heat source is applied to the side face in a common heating mode, a battery heating function is achieved, the mode needs to be designed with a special or special heating source structure due to the special shape of the side face, if a liquid cooling mode is adopted, the problem of insulation of the surface of the cell needs to be solved, the implementation mode is complex, the cost is high, the internal space of the battery can be occupied, the size of the battery is increased, the energy density is reduced, and the high-efficiency utilization of the lithium battery is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery heating mechanism, which does not occupy the internal space of a battery by arranging heating sources at the positions of polar columns at two ends of a battery core, controls the volume of a battery module, improves the energy density of the battery module, and has the advantages of simple structure and lower manufacturing cost.

In order to achieve the technical effects, the technical scheme of the utility model is as follows:

the utility model discloses a battery heating mechanism, comprising: the heating component is integrated with a heating piece; a busbar electrically connected to a pole of the battery; the heating piece is connected with the bus bar in a heat conduction way.

Preferably, the heating member is a voltage collecting plate, the voltage collecting plate is arranged between the battery and the busbar, a plurality of avoiding grooves are arranged on the voltage collecting plate, the pole of the battery is electrically connected with the busbar by penetrating through the avoiding grooves, and the heating member is arranged on the side surface of the voltage collecting plate facing the busbar; or a plurality of avoiding grooves are formed in the voltage acquisition plate, the welding end of the busbar penetrates through the avoiding grooves to be electrically connected with the pole of the battery, and the heating piece is arranged on the side surface, facing the busbar, of the voltage acquisition plate; or, the busbar set up in voltage acquisition board with between the utmost point post, the busbar with utmost point post electrical connection, voltage acquisition board orientation be provided with on the side of busbar the piece that generates heat.

Preferably, the heating element is a PTC or copper-clad conductor or a heating resistor provided on the voltage collecting plate.

Preferably, the bus bar is provided with a bending portion facing the heat generating member at a portion thermally connected to the heat generating member.

Preferably, the voltage collecting plate is used for collecting voltage information of the single batteries, and the voltage collecting plate is electrically connected with the bus bar.

Preferably, the voltage acquisition board is provided with a first temperature sensor for monitoring the temperature of the heating element, and the first temperature sensor is electrically connected to the voltage acquisition board and is connected with the heating element in a heat-conducting manner.

Preferably, the battery is provided with a second temperature sensor, and the second temperature sensor is electrically connected to the single voltage acquisition board and is in heat conduction connection with a pole of the battery or a shell of the battery.

Preferably, the number of the voltage acquisition plates is two, and the two voltage acquisition plates are respectively installed on two sides of the battery.

Preferably, the heat-conducting connection mode is that heat-conducting silica gel is coated on a heat-conducting interface.

Preferably, the heating members are arranged in an S-shaped manner on the heat conducting interface.

The battery heating mechanism has the beneficial effects that: according to the battery heating mechanism, the heating piece arranged on the voltage acquisition board at one side of the battery is used for heating from the pole of the battery, the battery heating does not occupy the internal space of the battery module, the installation space of the flexible heating device is not required to be reserved in the battery module during design, the size of the battery module is controlled, and the energy density of the battery module is improved. The structure of the cylinder heating mechanism is very simple, and the manufacturing cost is low.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

Fig. 1 is a schematic structural view of a cylindrical battery according to an embodiment of the present invention;

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

FIG. 3 is an enlarged schematic view of FIG. 1 at circle B;

FIG. 4 is a partial cross-sectional view taken generally at A in FIG. 1;

FIG. 5 is a schematic structural diagram of another embodiment of the present invention;

FIG. 6 is a partial exploded view of the embodiment shown in FIG. 5;

fig. 7 is a partial cross-sectional view of the post weld in the embodiment of fig. 5.

Reference numerals:

1. a voltage acquisition board; 11. an avoidance groove;

2. a heat generating member;

3. a bus bar; 31. a connecting portion; 32. welding the part;

10. a cylindrical battery; 101. and (4) a pole.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A cylindrical battery heating mechanism of an embodiment of the present invention is described below with reference to fig. 1 to 4.

The utility model discloses a cylindrical battery heating mechanism, as shown in fig. 1, the cylindrical battery heating mechanism of the embodiment comprises a voltage acquisition board 1, a bus bar 3 and a heat conduction piece formed by coating heat conduction silica gel or heat conduction silica grease, wherein the voltage acquisition board 1 is provided with a heating piece 2, the bus bar 3 is connected to the poles 101 of two adjacent cylindrical batteries 10, and the heat conduction piece is arranged between the bus bar 3 and the heating piece 2. It can be understood that, in the actual operation process, when the temperature of the cylindrical battery 10 is lower than the discharging temperature, the heating program is started, the voltage is applied to the two ends of the heating member 2 on the voltage collecting plate 1, so as to generate heat, the heat is transferred to the bus bar 3 through the heat conducting member, and then is conducted to the pole 101 of the cylindrical battery 10, so as to heat the two ends of the cylindrical battery 10, and the temperature of the cylindrical battery 10 is raised to the dischargeable temperature. Compare with the global device of prior art group heating cylinder battery 10, the cylinder battery heating mechanism of this embodiment is through establishing the piece 2 that generates heat on the voltage acquisition board 1 in cylinder battery 10 one side from cylinder battery 10's tip heating cylinder battery 10, this cylinder battery 10 heating does not occupy battery module inner space, need not reserve flexible heating device's installation space in the battery module inside when the design, has controlled the volume of battery module, has promoted the energy density of battery module. Meanwhile, the cylindrical battery heating mechanism of the embodiment only comprises the voltage acquisition plate 1 and the bus bar 3 which are arranged at the end parts of the cylindrical battery 10, and the mechanism is very simple and has low manufacturing cost. The heat generating member 2 is provided with a first temperature sensor (not shown) for monitoring the temperature thereof, and the battery 10 is provided with a second temperature sensor (not shown) for monitoring the temperature thereof. The first temperature sensor is electrically connected to the cell voltage collecting plate 1 of the battery 10 and is connected to the heat generating member 2 in a heat conductive manner. The second temperature sensor is electrically connected to the cell voltage collecting plate 1 of the battery 10, and is thermally connected to the terminal of the battery 10. The heat conducting connection is formed by coating heat conducting silicone grease or heat conducting silicone on a heat conducting interface.

In some embodiments, the number of the voltage collecting plates 1 is two, and the two voltage collecting plates 1 are fitted on both sides of the cylindrical battery 10. It is understood that if only one side is heated, the cylindrical battery 10 is not heated uniformly, which is not favorable for the normal operation of the cylindrical battery 10. In this embodiment, the voltage collecting plates 1 are disposed on two sides of the cylindrical battery 10, so that the cylindrical battery 10 can be uniformly heated during the heating process, and the phenomenon of abnormal operation caused by local overheating of the cylindrical battery 10 is avoided.

In some embodiments, the heat generating member 2 includes a resistance wire or a PTC or a copper-clad conductor or a heating resistor provided on the voltage collecting board 1. It can be understood that, the resistance wire is adopted as the heating element 2, on one hand, the structure of the heating device of the whole cylindrical battery 10 can be simplified, and on the other hand, the structure, the trend and the cross-sectional area of the resistance wire can be adjusted according to the arrangement mode of the cylindrical battery 10, so that the heating device of the cylindrical battery 10 in the embodiment can be adapted to the cylindrical batteries 10 with various sizes.

Of course, in other embodiments of the present invention, the cylindrical battery 10 heating device may also select other heating structural members according to actual needs, and is not limited to the resistance wire of this embodiment.

In some embodiments, the thermally conductive member is thermally conductive silicone. It can be understood that the heat conducting member is made of heat conducting silica gel, so that the heat conducting member is convenient to mount, and the cost can be reduced. Of course, in other embodiments of the present invention, the heat conducting member may be made of other heat conducting materials according to actual needs, and is not limited to the heat conducting silicone gel of the embodiment.

In some embodiments, as shown in fig. 4, the voltage collecting plate 1 is provided with a plurality of avoiding grooves 11, and the poles 101 of the cylindrical battery 10 can pass through the avoiding grooves 11 to be connected with the bus bar 3. It will be understood that if the escape groove 11 is not provided, the bus bar 3 is connected to the pole 101 of the cylindrical battery 10 and then comes into contact with the heat generating member 2 of the voltage collecting plate 1. The dimensions of the battery end should then be the sum of the dimensions of the battery post 101, the busbar 3, the heat-conducting element and the voltage collector plate 1. In this embodiment, the avoiding groove 11 is formed on the voltage collecting plate 1, and when the cylindrical battery 10 is installed, the post 101 of the cylindrical battery needs to penetrate through the avoiding groove 11 to be connected with the bus bar 3, so that the size of the end of the cylindrical battery is the sum of the sizes of the battery post 101, the bus bar 3 and the heat conducting member. Thereby, the end size of the cylindrical battery 10 is reduced, and the energy density of the battery module is improved.

In some embodiments, the bus bar 3 may also be optionally disposed between the voltage collecting plate 1 and the pole 101, the bus bar 3 is electrically connected to the pole 101, and the side of the voltage collecting plate 1 facing the bus bar 3 is provided with the heating element 2, so as to enrich the arrangement of the voltage collecting plate 1.

In some embodiments, the plurality of avoidance slots 11 are arranged in a plurality of rows and a plurality of columns. From this, can make a plurality of cylinder batteries 10 be multirow multiseriate and arrange for the mode of arranging of cylinder battery 10 is comparatively regular, is favorable to promoting the energy density of whole battery module.

In some embodiments, the busbar 3 includes a connecting portion 31 and two welding portions 32 connected to the connecting portion 31, each welding portion 32 being in welded connection with one of the poles 101. It can be understood that, by welding the welding portion 32 and the pole 101, the connection stability and the conduction stability of the bus bar 3 and the pole 101 are improved.

In some specific embodiments, two welding portions 32 are located at two ends of the connecting portion 31 and are arranged in parallel.

It can be understood that, when the cylindrical batteries 10 are distributed in a plurality of rows and a plurality of columns, the two welding portions 32 are located at both ends of the connecting portion 31 and arranged in parallel, so that the bus bar 3 can stably connect the poles 101 of the two cylindrical batteries 10 in series.

In some specific embodiments, two welding portions 32 are located at one side of the connecting portion 31 and are spaced apart from each other.

It can be understood that, when the cylindrical batteries 10 are arranged in a plurality of rows and columns, the two welding portions 32 are positioned on one side of the connecting portion 31 and spaced apart from each other to ensure that the bus bar 3 can stably connect the poles 101 of the two cylindrical batteries 10 in series.

In some specific embodiments, the connecting portion 31 and the welding portion 32 are an integral structure. It can be understood that the connecting portion 31 and the welding portion 32 are integrally formed, which can not only improve the strength of the whole bus bar 3, but also reduce the manufacturing cost of the bus bar 3.

A cylindrical battery heating structure according to an embodiment of the present invention will be described with reference to fig. 1.

The cylinder battery heating mechanism of this embodiment includes voltage acquisition board 1, busbar 3 and heat-conducting piece, be equipped with on voltage acquisition board 1 and be the groove 11 of dodging of multirow multiseriate setting, be equipped with on voltage acquisition board 1 and generate heat 2 (generate heat 2 and be the resistance wire), busbar 3 includes connecting portion 31 and two weld parts 32, connecting portion 31 links to each other with two weld parts 32, utmost point post 101 welded connection of every weld part 32 and a cylinder battery 10, heat-conducting piece establishes at busbar 3 and generates heat between 2, and be heat conduction silica gel. In addition, because the piece 2 that generates heat sets up on voltage acquisition board 1, busbar 3 reduces the distance of heat transfer for carrying out the heat transfer better with the piece 2 that generates heat, and busbar 3 is equipped with the portion of bending between welded utmost point post 101, makes the contact distance of the piece 2 that generates heat and the portion of bending reduce, increases heat transfer efficiency.

As shown in fig. 5-7, another embodiment is different from the above embodiments in that the voltage collecting plate 1 is preset with an avoiding groove 11, the bus bar 3 is bent in a zigzag shape, two ends are welding ends, the middle is a heat conducting and heat transferring portion, the welding end of the bus bar 3 can penetrate through the avoiding groove 11 to be welded with the terminal 101, the heat transferring portion of the bus bar 3 is connected with the heating element 2 integrated on the voltage collecting plate 1 through heat conducting silica gel, wherein the heating element 2 is for achieving a better heat transferring effect, and the heating element 2 is arranged in an S shape with the corresponding portion of the heat transferring portion to increase the heating contact area and enhance the heat transferring effect.

The beneficial effect of the cylindrical battery heating structure of the above 2 embodiments:

firstly, the method comprises the following steps: the cylindrical battery 10 is heated by adopting an end heating mode, the internal space of the battery module is not occupied, the volume of the battery module is controlled, and the energy density of the battery module is improved;

secondly, the method comprises the following steps: the structure is simple, and the manufacturing cost is low;

thirdly, the method comprises the following steps: the heating parts 2 are arranged at the two ends of the cylindrical battery 10, so that the cylindrical battery 10 can be uniformly heated;

fourthly: be equipped with heat conduction silica gel between busbar 3 and the resistance wire, on having ensured that the heat of resistance wire can conduct the busbar steadily, promoted the heat utilization ratio of resistance wire.

In the description herein, references to the description of "some embodiments," "other embodiments," 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 utility model. 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.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. A battery heating mechanism, comprising:

the heating component is integrated with a heating piece (2);

a busbar (3), the busbar (3) being electrically connected to a pole (101) of a battery (10);

the heating piece (2) is connected with the bus bar (3) in a heat conduction way.

2. The battery heating mechanism according to claim 1, wherein the heating member is a voltage collecting plate (1), the voltage collecting plate (1) is disposed between the battery (10) and the busbar (3), a plurality of avoiding grooves (11) are disposed on the voltage collecting plate (1), the terminal (101) of the battery (10) is electrically connected to the busbar (3) by passing through the avoiding grooves (11), and the heat generating member (2) is disposed on a side surface of the voltage collecting plate (1) facing the busbar (3); or a plurality of avoiding grooves (11) are formed in the voltage acquisition plate (1), the welding end of the busbar (3) penetrates through the avoiding grooves (11) to be electrically connected with the pole (101) of the battery (10), and the heating piece (2) is arranged on the side face, facing the busbar (3), of the voltage acquisition plate (1); or, busbar (3) set up in voltage acquisition board (1) with between utmost point post (101), busbar (3) with utmost point post (101) electrical connection, voltage acquisition board (1) orientation be provided with on the side of busbar (3) piece (2) generate heat.

3. The battery heating mechanism according to claim 2, wherein the heat generating member (2) is a PTC or a copper-clad conductor or a heating resistor provided on the voltage collecting plate (1).

4. The battery heating mechanism according to claim 3, wherein the bus bar (3) is provided with a bent portion facing the heat generating member (2) at a portion thermally conductively connected to the heat generating member (2).

5. The battery heating mechanism according to claim 2, wherein the voltage collecting plate (1) is used for collecting voltage information of the single batteries (10), and the voltage collecting plate (1) is electrically connected with the bus bar (3).

6. The battery heating mechanism according to claim 2, wherein the voltage collecting plate (1) is provided with a first temperature sensor for monitoring the temperature of the heat generating member (2), and the first temperature sensor is electrically connected to the voltage collecting plate (1) and is in heat-conducting connection with the heat generating member (2).

7. The battery heating mechanism according to claim 2, characterized in that the battery (10) is provided with a second temperature sensor which is electrically connected to the cell voltage acquisition board (1) and is in heat conducting connection with the pole (101) of the battery (10) or with the housing of the battery (10).

8. The battery heating mechanism according to claim 2, wherein the number of the voltage collecting plates (1) is two, and the two voltage collecting plates (1) are respectively installed on both sides of the battery (10).

9. The battery heating mechanism of any of claims 1-8, wherein the thermally conductive connection is a thermally conductive silicone coating on the thermally conductive interface.

10. The battery heating mechanism according to any one of claims 1-8, wherein the heat generating members (2) are arranged in an S-shape at the heat conducting interface.