KR101348579B1 - Temperature Sensing Assembly and Battery Module Assembly Employed with the Same - Google Patents

Abstract

The present invention is a temperature sensing assembly for measuring the temperature of the battery module, two or more battery modules in contact with or adjacent to each other in the battery module assembly arranged in close contact or adjacent to the insulation assembly is inserted and fixed to the sensing assembly mounting portion main body; A temperature sensing member rotatably mounted to the insulating body to prevent damage to external vibration and impact; And a connecting member electrically connecting the temperature sensing member and the control member. It provides a temperature sensing assembly and a battery module assembly including the same.

Description

Temperature Sensing Assembly and Battery Module Assembly Employed with the Same}

The present invention is a temperature sensing assembly for measuring the temperature of the battery module, specifically, two or more battery modules are inserted into the sensing assembly mounting portion which is a space formed between the battery modules in the battery module assembly arranged in close contact or adjacent to each other And a fixed insulating body, a temperature sensing member rotatably mounted to the insulating body to prevent damage to external vibration and shock, and a connection member electrically connecting the temperature sensing member and the control member. The present invention relates to a temperature sensing assembly and a battery module assembly including the same.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. In addition, the secondary battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (HEV), and the like, which are proposed as solutions for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels (Plug-In HEV) and the like.

In a small mobile device, one or two or more battery cells are used per device, while a middle- or large-sized battery module such as an automobile is used as a middle- or large-sized battery module in which a plurality of battery cells are electrically connected due to the necessity of a large-

Since the middle- or large-sized battery module is preferably manufactured in a small size and weight, a prismatic battery, a pouch-shaped battery, or the like, which can be charged with a high degree of integration and has a small weight to capacity, is mainly used as a battery cell have.

In particular, a pouch-shaped battery using an aluminum laminate sheet or the like as an exterior member has recently attracted a lot of attention due to its advantages such as small weight, low manufacturing cost, and easy shape deformation.

Since the battery cells constituting the medium-large battery module are composed of secondary batteries capable of charging and discharging, such a high output large capacity secondary battery generates a large amount of heat during the charging and discharging process.

Particularly, since the laminate sheet of the pouch-type battery widely used for the battery module has a surface coated with a polymer material having low thermal conductivity, it is difficult to effectively cool the temperature of the entire battery cell.

If the heat of the battery module generated during the charging and discharging process can not be effectively removed, heat accumulation may occur, thereby accelerating the deterioration of the battery module and possibly causing ignition or explosion.

Therefore, a battery pack for a vehicle that is a high output large capacity battery requires a cooling system for cooling the battery cells embedded therein, and a temperature sensor for measuring the temperature of the battery is required to control the same.

In general, the temperature sensor is inserted into the space formed between the battery cell or the battery module and is mounted, and is configured to be completely fixed to the injection structure of the insulating member in order to prevent damage due to direct contact during insertion or use. .

However, the above-described mounting structure of the temperature sensor, when an external force is applied to the battery module from the outside, the load is biased at the attachment position of the temperature sensor, so that deformation and damage of the sensor occurs, it is not possible to accurately measure the temperature of the battery cell There is a problem.

Therefore, there is a high necessity to develop a structure in which a temperature sensor can be easily mounted on a battery cell or a battery module without causing damage even when an external impact is applied.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the prior art and the technical problems required from the past.

SUMMARY OF THE INVENTION An object of the present invention is to provide a temperature sensing assembly having a structure in which a shock is prevented by breaking with rotational degrees of freedom without being released from the mounting portion by an applied external shock and vibration to prevent breakage.

Still another object of the present invention is to provide a battery pack including a battery module using the temperature sensing assembly having the above structure, thereby improving durability and safety.

Temperature sensing assembly according to the present invention for achieving this object, as a member for measuring the temperature of the battery module,

An insulating body in which two or more battery modules are inserted and fixed to a sensing assembly mounting portion, which is a space formed between the battery modules in a battery module assembly arranged in close or close proximity to each other;

A temperature sensing member rotatably mounted to the insulating body to prevent damage to external vibration and impact; And

A connection member for electrically connecting the temperature sensing member and the control member;

As shown in FIG.

Therefore, the temperature sensing assembly according to the present invention is rotatably mounted to the external shock to which the temperature sensing member and the connection member are applied to mitigate the impact, thereby accurately measuring the temperature of the battery cell or the battery module without damage or deformation. There is.

In one preferred embodiment, the insulating body,

(a) a guide portion having a shape that can be inserted into a space between the battery modules;

(b) a sensor mounting part formed on one surface of the guide part so that the temperature sensing member can be mounted and partitioned into partitions having a shape corresponding to the temperature sensing member and the connection member; And

(c) a fixing portion extending from the rear end of the guide portion and protruding outward when the temperature sensing member is inserted into and fixed to the sensing assembly mounting portion;

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The guide portion is a plate-shaped structure that can be easily inserted even in a narrow space, preferably, both sides of the front end portion of the guide portion is made of a tapered structure to facilitate insertion into the sensing assembly mounting portion, the sensor mounting portion is formed in the guide portion One surface and its opposite surface may have a structure in which lattice ribs are formed around the sensor mounting portion.

Since the lattice ribs strengthen the mechanical rigidity of the temperature sensing assembly, it is possible to prevent breakage due to external force applied when the insulating body is inserted into the sensing assembly mounting portion or in the assembled state. In other words, the above-described effects are obtained by providing mechanical rigidity against force acting horizontally with respect to the insertion direction.

The barrier rib, preferably, may have a structure protruding in the size of 10 to 50% based on the thickness of the guide portion. Bulkheads projecting less than 10% in size may have a weak clamping force to prevent separation of the temperature sensing assembly inserted into the mounting groove against external shocks and vibrations. It is not likely to be damaged or deformed by an impact or the like, in which case the impact can be transmitted directly to the temperature sensing member.

Therefore, the temperature sensing assembly according to the present invention has mechanical rigidity against external force acting in the vertical direction ('left and right') with respect to the insertion direction, and the sensor mounting portion is inclined by the battery module assembly due to an applied external shock or the like. It is formed by the partition of constant thickness so that a member and a connection member may not be pressed.

As a result, the temperature sensing assembly has an effect of preventing battery modules from being damaged due to direct contact with the temperature sensing member and the connection member by an external impact.

According to the structure according to the present invention, the partition wall forms a predetermined partition space, that is, a mounting space of the temperature sensing member and the connection member. The mounting space partitioned by the partition wall is preferably formed large in the range of 10 to 40% with respect to the outer circumferential surfaces of the temperature sensing member and the connecting member based on the sizes of the temperature sensing member and the connecting member.

When the mounting space is less than 10%, the radius of rotation of the temperature sensing member and the connecting member may be reduced, so that the degree of freedom of rotation may not be sufficiently provided against external shock, and, in the case of more than 40%, the possibility of collision with the partition wall is increased due to excessive rotational freedom. This is undesirable because it may cause breakage and deformation of the temperature sensing member or departure of the connection member.

Therefore, the temperature sensing assembly according to the present invention has a suitable degree of rotational freedom up and down with respect to the external force acting in the vertical direction ('up and down direction') with respect to the insertion direction, the temperature sensing member and the connection member is mounted to alleviate the shock It is effective to prevent.

That is, as the conventional method does not completely fix the temperature sensing member and the connecting member to the insulating body, they have rotational degrees of freedom in which they can flow in a predetermined mounting space against vibration caused by external impact, thereby preventing breakage and deformation of the temperature sensing assembly. It can prevent.

In one preferred example, the sensor mounting portion may have a structure in which one or more openings are perforated so that at least a portion of the mounted temperature sensing member is exposed to the opposite surface of the guide portion.

On the other hand, the temperature sensing member as a plate-like structure as a whole, it may be made of a structure including a circular head, and a connecting portion extending from the head to the connecting end connected to the rear end.

Preferably, a fastening groove is drilled in the center of the head of the temperature sensing member, and a protruding fastening portion is formed in a mounting portion of the guide part corresponding to the fastening groove, so that the protruding fastening portion and the fastening groove are coupled to each other. The temperature sensing member head is fixed even in the external shock so that the temperature of the battery module assembly can be accurately measured.

The shape of the protruding fastening part is not particularly limited as long as it is a shape capable of fixing the temperature sensing member, but preferably, at least two fastening protrusions protruding upward from a position corresponding to the shape of the inner circumferential surface of the fastening groove of the temperature sensing member head. It may be a structure containing. In this structure, the fastening protrusions have an upward tapered structure, so that the mounting of the temperature sensing member to the protruding fastening portion is easy.

In addition, the protruding fastening portion may act as a rotating shaft that can easily give a rotational freedom to the temperature sensing member, the fastening groove may preferably have a circular structure.

The connecting member may be composed of a cable, a wire, or the like as a means for electrically connecting the control member and the temperature sensing member. Since the connecting member is mounted in the insulating main body, a separate insulating coating is not required, and thus a wire may be more preferable in terms of suppressing the increase in thickness.

The fixing part serves to prevent the temperature sensing member from being deformed or damaged by excessive insertion force in the insertion process and to fix the temperature sensing member to the sensing assembly mounting part while being fixed in place. In some cases, depending on the fastening with the sensing assembly mounting portion may play a role of improving the fastening force.

The fixing part, for example, one surface may protrude in the direction in which the sensor mounting portion is formed and the opposite surface may be formed of a hollow hexahedral structure. In this structure, the inside of the hollow hexahedral structure is formed in the lattice-shaped ribs and the front end is a structure in which the fixing groove is formed, the coupling protrusion formed in the battery module is inserted into the fixing groove when the temperature sensing assembly is inserted. Is done.

The present invention also provides a battery module assembly including the temperature sensing assembly and a battery pack including the same.

The battery module assembly may include, for example, a cell module stack in which a plurality of battery cells and two or more battery modules having a structure in which the battery cells are mounted in a cartridge form a close or adjacent stacked structure; A bottom plate supporting a lower end of the unit cell module stack; An upper plate fixing the uppermost cell or unit module of the cell module stack positioned on the lower plate; And a sensing assembly mounting part formed between the battery modules via the lower plate or the upper plate so that the temperature sensing assembly can be fixedly inserted therein.

In this structure, the sensor mounting portion is a mounting groove that is inserted into the guide of the insulating body; And a fixing protrusion inserted into the fixing groove of the fixing unit to strengthen the fixing force of the temperature sensing assembly. Preferably, the fixing protrusion has a shape corresponding to the fixing groove.

The battery cell may be a pouch-type battery cell in which a case of a laminate sheet including a resin layer and a metal layer is embedded in an electrode assembly, and the laminate sheet may be a heat-sealed inner resin layer, a barrier metal layer, and an exterior that exhibits durability. It may be a structure including a resin layer.

On the other hand, in the case of medium and large battery packs, a plurality of battery cells are used to secure high output and large capacity. The battery modules constituting such battery packs have a uniform temperature deviation between the battery cells to ensure safety. Required.

Accordingly, the present invention provides a high output large-capacity battery pack manufactured by using the battery module as a unit, and a device using the battery pack as a power source.

Medium and large battery packs according to the present invention can be manufactured by combining the battery modules according to the desired output and capacity, considering the mounting efficiency, structural stability, and the like as described above, electric vehicles, hybrid electric vehicles, plug-in hybrid It can be used suitably as a power supply of an electric vehicle or an electric power storage device.

As described above, the temperature sensing assembly according to the present invention is rotatably mounted to the external shock to which the temperature sensing member and the connecting member are applied to mitigate an impact to accurately measure the temperature of the battery cell or the battery module without damage or deformation. It can be effective.

In addition, the mechanical rigidity is improved by the partition walls and ribs, thereby preventing damage caused by external force applied during assembly and use.

Therefore, the battery module assembly including the temperature sensing assembly according to the present invention has an effect of improving durability and stability.

1 is a perspective view of one exemplary battery cell mounted in a battery module of the present invention;
2 is an exploded view of the battery cell of Figure 1;
3 is a perspective view of a temperature sensing assembly according to one embodiment of the present invention;
4 is a side view in one direction of the temperature sensing assembly of FIG. 3;
FIG. 5 is a side view in the opposite surface direction of the temperature sensing assembly of FIG. 3; FIG.
6 is a perspective view of a battery module assembly to which the temperature sensing assembly of FIG. 3 is mounted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited by the scope of the present invention.

1 is a perspective view schematically showing one exemplary battery cell mounted to the battery module of the present invention, and FIG. 2 is an exploded schematic view of FIG. 1.

Referring to these drawings, the pouch-type battery cell 100, inside the pouch-type battery case 10, the electrode assembly 20 consisting of a positive electrode, a negative electrode and a separator disposed therebetween the positive and negative electrode tabs ( Two electrode terminals 50 and 60 electrically connected to 30 and 40 are sealed to be exposed to the outside.

The battery case 10 is composed of a case body 3 including a concave shape receiving portion 1 in which the electrode assembly 20 can be seated, and a cover 4 integrally connected to the body 3. have.

In the electrode assembly 20 having a stack type or stack / fold type structure, a plurality of positive electrode tabs 30 and a plurality of negative electrode tabs 40 are fused to each other and coupled to the electrode terminals 50 and 60. In addition, when the excess part 2 and the cover 4 of the case body 3 are heat-sealed by the heat-sealing machine, a short is prevented from occurring between the heat-sealing machine and the electrode terminals 50 and 60, and the electrode terminal 50 is prevented. In order to secure the sealing property between the battery case 10 and the battery case 10, the insulating film 70 is attached to upper and lower surfaces of the electrode terminals 50 and 60.

The case body 3 and the lid 4 are composed of an outer resin layer 5, a barrier metal layer 6, and an inner resin layer 7, and the inner resin layer 7 is an outer surface of the case body 3. And heat and pressure from a heat fusion machine (not shown) applied to the outer surface of the lid 4 can be tightly fixed.

When the electrode assembly 20 impregnated with the electrolyte is seated on the accommodating part 1, the sealing part is formed by thermally bonding the contact portion between the excess part 2 of the case body 3 and the cover 4.

Figure 3 is a perspective view of a temperature sensing assembly according to an embodiment of the present invention schematically, Figure 4 is a side view of one side of the temperature sensing assembly of Figure 3 schematically, Figure 5 A side view of the temperature sensing assembly of FIG. 3 in a direction opposite to the surface is schematically illustrated. 6 is a schematic perspective view of a battery module assembly including a temperature sensing assembly according to the present invention.

Referring to these drawings, the battery module assembly 400 includes a cell module stack 410 consisting of two battery modules 411 and 412, a top plate 420, a bottom plate 430, and side surfaces of the battery modules. The sensing assembly mounting portion 440 is formed.

The bottom plate 430 is located at the bottom of the cell module stack 410 and the top plate 420 is located at the top of the cell module stack 410.

In the cell module stack 410, two battery modules 411 and 412 form a close or adjacent stack structure, and a sensing assembly mounting part 440 through which the temperature sensing assembly 200 can be inserted and fixed therebetween. ) Is formed. The sensing assembly mounting part 440 includes a mounting groove 441 into which the guide part 210 of the insulating body 240 is inserted and a fixing protrusion 442 inserted into the fixing part 230.

The temperature sensing assembly 200 includes an insulating body 240 inserted into and fixed to the sensing assembly mounting part 440, a temperature sensing member 270 rotatably mounted to the insulating body 240, and a temperature sensing member 270. It consists of a connection member 280 electrically connected to a control member (not shown).

In addition, the insulating main body 240 has a structure extending from the rear end of the guide portion 210, the sensor mounting portion 220 is mounted on the temperature sensing member 270 and the connecting member 280, and the guide portion 210 It consists of a fixed portion (230).

Guide portion 210 has a tapered structure on both sides of the front end portion in order to be easily inserted into the mounting groove 441. In addition, an opening 212 in which a sensor mounting part 220 is formed on one surface 210a of the guide part 210 and a part of the temperature sensing member 270 mounted to the sensor mounting part 220 is exposed on the opposite surface 210b. Three are partially formed in a circle, and lattice ribs 213 are formed on one surface 210a and the opposite surface 210b of the guide portion 210 around the sensor mounting portion 220.

The sensor mounting unit 220 is partitioned into partitions 221 and is formed to have a shape corresponding to that of the temperature sensing member 270 and the connection member 280 to be larger than their size. In addition, the partitions 221 are formed to be thicker than the thickness of the guide portion 210 to protrude from one surface 210a of the guide portion 210.

The temperature sensing member 270 has a circular head 250 and a connecting portion 260 extending therefrom in a plate shape. The head 250 has a structure in which the drilling groove 251 is drilled in the center, and the drilling groove 251 is coupled to the protrusion coupling portion consisting of three fastening protrusions 222 of a tapered structure that is upwardly protruding.

The fastening protrusions 222 prevent the temperature sensing member 270 from being separated, thereby maintaining a stable mounting state of the temperature sensing member 270.

The connection member 280 connected to the connection portion 260 of the temperature sensing member 270 is made of a wire.

One front surface 230a of the fixing portion 230 protrudes in the direction in which the sensor mounting portion 220 is formed, and the opposite surface 230b is formed of a hollow hexahedral structure 235. The lattice ribs (not shown) are formed in the hollow hexahedral structure 235, and the fixing groove 233 is formed in the front end thereof.

Therefore, when the fixing protrusion 442 is inserted into and fixed to the fixing groove 233 when the temperature sensing assembly 200 is inserted, the temperature sensing assembly 200 is not separated from the applied external shock.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Claims (20)

A temperature sensing assembly for measuring the temperature of the battery module,
An insulating body in which two or more battery modules are inserted and fixed to a sensing assembly mounting portion, which is a space formed between the battery modules in a battery module assembly arranged in close or close proximity to each other;
A temperature sensing member rotatably mounted to the insulating body to prevent damage to external vibration and impact; And
A connection member for electrically connecting the temperature sensing member and the control member;
Temperature sensing assembly comprising a. The method of claim 1, wherein the insulating main body,
(a) a guide portion having a shape that can be inserted into a space between the battery modules;
(b) a sensor mounting part formed on one surface of the guide part so that the temperature sensing member can be mounted and partitioned into partitions having a shape corresponding to the temperature sensing member and the connection member; And
(c) a fixing portion extending from the rear end of the guide portion and protruding outward when the temperature sensing member is inserted into and fixed to the sensing assembly mounting portion;
Temperature sensing assembly comprising a structure comprising a. The temperature sensing assembly according to claim 2, wherein the guide portion has a plate-like structure, and both sides of the front end portion of the guide portion have a tapered structure to facilitate insertion into the sensing assembly mounting portion. 3. The temperature sensing assembly according to claim 2, wherein lattice ribs are formed on the surface of the guide portion on which the sensor mounting portion is formed and on an opposite surface thereof. The temperature sensing assembly of claim 2, wherein the partition wall protrudes in a size of 10 to 50% based on the thickness of the guide part. According to claim 2, The mounting space partitioned by the partition wall, 10 to 40 with respect to the outer peripheral surface of the temperature sensing member and the connection member based on the size of the temperature sensing member and the connection member so that the mounted temperature sensing member is rotatable. A temperature sensing assembly, characterized in that it is formed large in the% range. 3. The temperature sensing assembly of claim 2, wherein the sensor mounting portion is perforated with one or more openings such that at least a portion of the mounted temperature sensing member is exposed to the opposite surface of the guide portion. 3. The temperature sensing assembly according to claim 2, wherein the temperature sensing member has a plate-like structure as a whole, and includes a circular head and a connection part extending from the head and connected to a rear end thereof. The temperature sensing assembly according to claim 8, wherein a fastening groove is formed in the center of the head of the temperature sensing member, and a protruding fastening portion is formed in a mounting portion of the guide part corresponding to the fastening groove. The temperature sensing assembly according to claim 9, wherein the protruding fastening part includes two or more fastening protrusions protruding upward at a position corresponding to the inner circumferential surface shape of the fastening groove of the temperature sensing member head. The temperature sensing assembly of claim 10, wherein the fastening groove has a circular shape and the fastening protrusions have an upward tapered structure. The temperature sensing assembly of claim 2, wherein the connection member is a wire. The temperature sensing assembly according to claim 2, wherein the fixing part of the insulating body protrudes in the direction in which the sensor mounting part is formed. 3. The temperature sensing assembly according to claim 2, wherein one side of the fixing part is a hollow hexahedral structure in which lattice ribs are formed, and the other side is formed of a fixing groove. A battery module assembly comprising a temperature sensing assembly according to any one of claims 1 to 14. The method of claim 15, wherein the battery module assembly,
A plurality of battery cells and a cell module stack in which two or more battery modules having a structure in which the battery cells are mounted in a cartridge form a close or adjacent stacked structure;
A bottom plate supporting a lower end of the unit cell module stack;
An upper plate fixing the uppermost cell or unit module of the cell module stack positioned on the lower plate; And
A sensing assembly mounting part formed between the battery modules via a lower plate or an upper plate so that a temperature sensing assembly can be inserted and fixed;
The battery module assembly comprising: The battery module assembly according to claim 16, wherein the battery cell is a pouch type battery cell in which an electrode assembly is built in a case of a laminate sheet including a resin layer and a metal layer. A high output large capacity battery pack, characterized in that it comprises at least two battery module assembly according to claim 17. A device comprising the battery pack according to claim 18 as a power source. 20. The device of claim 19, wherein the device is an electric vehicle, a hybrid-electric vehicle, a plug-in hybrid vehicle, or a power storage device.

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