KR20160076864A - Battery module and battery pack including the same - Google Patents

Abstract

The present invention relates to a battery module and a battery pack comprising the same. The battery module comprises: a secondary battery; a cell assembly having a plurality of cartridges in which the secondary battery is placed and can be laminated from each other; and a temperature measurement unit having a temperature sensor which is placed to be inserted into and withdrawn from the cell assembly and measures the temperature of the secondary battery, wherein at least one of the cartridges comprises a sensor pressure unit which pressurizes the temperature sensor for coming into contact with a surface of the secondary battery when the temperature sensor is inserted into the cell assembly.

Description

[0001] The present invention relates to a battery module and a battery pack including the battery module,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery module, and more particularly, to a battery module capable of improving temperature measurement performance and a battery pack including the battery module.

2. Description of the Related Art In recent years, demand for portable electronic products such as notebook computers, video cameras, and portable telephones has rapidly increased, and electric vehicles, storage batteries for energy storage, robots, and satellites have been developed in earnest. Are being studied actively.

The secondary rechargeable batteries are nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel- It is very popular because of its low self-discharge rate and high energy density.

These lithium secondary batteries mainly use a lithium-based oxide and a carbonaceous material as a cathode active material and an anode active material, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate each coated with such a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, and an outer casing, that is, a battery case, for sealingly storing the electrode assembly together with the electrolyte solution.

Generally, a lithium secondary battery can be classified into a can type secondary battery in which an electrode assembly is embedded in a metal can, and a pouch type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, depending on the shape of the casing.

In recent years, secondary batteries are widely used not only in small-sized devices such as portable electronic devices, but also in medium to large-sized devices such as automobiles and electric power storage devices. Particularly, as carbon energy is getting depleted and the interest in the environment is increasing, attention is focused on hybrid cars and electric cars worldwide, including the US, Europe, Japan, and Korea. The most important components in such hybrid vehicles and electric vehicles are battery packs that give drive power to vehicle motors. Since hybrid vehicles and electric vehicles can obtain the driving force of the vehicle through charging and discharging of the battery pack, the fuel efficiency is higher than that of the vehicle using only the engine, and the users are increasingly increasing in terms of not discharging or reducing pollutants. to be. The battery pack of the hybrid vehicle or the electric vehicle includes a plurality of secondary batteries, and the plurality of secondary batteries are connected in series and in parallel to improve capacity and output.

On the other hand, when using a battery module including a plurality of secondary batteries, temperature control of the battery module is a very important factor. In particular, the secondary battery may be used in a high temperature environment such as summer, and the secondary battery itself may also generate heat. In this case, when the plurality of secondary batteries are laminated to each other, the temperature of the secondary battery may be further increased. If the temperature is higher than the proper temperature, the performance of the secondary battery may deteriorate, and there is a risk of explosion or ignition in severe cases. Further, when the temperature of the battery module is excessively low, the performance of the secondary battery included in the battery module may be deteriorated. Therefore, the temperature of the battery module needs to be constantly monitored so that the performance of such a secondary battery or the dangerous situation does not occur or can be prepared for such a situation.

Conventionally, in order to measure the temperature of the battery module, the temperature measurement unit is incorporated in the battery module to measure the temperature of the secondary battery. However, in such a conventional battery module configuration, there is a problem that the process of assembling the temperature measurement unit is quite difficult. It is preferable that the temperature measurement unit is positioned as close as possible to the secondary battery. In the case of the conventional battery module configuration, the process of positioning the temperature measurement unit close to the secondary battery is difficult, There is also a problem that is broken. Further, in order to accurately detect the temperature, there is almost no gap between the temperature measurement unit and the secondary battery in the battery module. In the conventional technology, the contact state between the temperature measurement unit and the secondary battery is not reliable, It can be said that it is very difficult to accurately measure the temperature.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a battery module with improved structure, which is easy to assemble a temperature measuring unit and can measure temperature more accurately, and a battery pack and a vehicle including the same, The purpose.

Other objects and advantages of the present invention will become apparent from the following description, and it will be understood by those skilled in the art that the present invention is not limited thereto. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to the present invention, there is provided a secondary battery comprising: a cell assembly having a plurality of cartridges on which the secondary batteries are mounted and which are stacked one on another; And a temperature measuring unit provided in the cell assembly so as to be capable of being drawn out and capable of measuring the temperature of the secondary battery, wherein at least one of the plurality of the cartridges has the temperature sensor, And a sensor pressing portion for pressing the temperature sensor to come into contact with the surface of the secondary battery when the temperature sensor is in contact with the secondary battery.

The sensor pressing part may include a pressing member which is provided to have an elastic force on one side of the main frame forming the rim of the cartridge and elastically biases the temperature sensor toward the surface of the secondary battery.

The main frame may include a first frame in which the temperature sensor is partially inserted through a cut-out portion formed by partially cutting the body inward, and the sensor pressing portion may be provided in the cut-out portion.

The sensor pressing portion may further include a pressing plate extending in a cantilevered manner from one side of the cutout portion, and the pressing member may protrude from the surface of the pressing plate.

The pressing member may be at least one protrusion provided in a round shape.

The pressing plate and the pressing member may be integrally formed.

Wherein the sensor pressing portion includes: a base plate horizontally provided in the cutout portion; And an elastic member coupled to the base plate and extendable and retractable in the up and down direction, and the pressing member can be coupled to the end of the elastic member.

The cut-out portion may be formed in the center region of the first frame.

The first frame may further include a hook for preventing the temperature sensor from departing from the cut-out portion, and the temperature sensor may be formed with a hooking jaw which is engaged with the hook on at least one side portion thereof.

The sensing assembly may include at least one temperature sensor slot through which the temperature sensor passes, and a sensing assembly mounted on one side of the cell assembly to sense the electrical characteristics of the secondary battery.

The temperature sensor slot may be formed at a height corresponding to the cartridge including the sensor pressing portion.

The temperature measurement unit includes: a connector connected to the BMS module; And a cable connecting the connector and the temperature sensor.

The temperature sensor may be a thermistor.

According to another aspect of the present invention, a battery pack including the above-described battery module may be provided.

According to still another aspect of the present invention, there is provided an automobile including the above-described battery module.

According to an aspect of the present invention, the temperature sensor can be assembled to be in contact with the secondary battery within the cell assembly, and the temperature of the secondary battery can be more accurately measured.

According to another aspect of the present invention, mounting and dismounting of the temperature sensor is easy, and the temperature sensor can be easily replaced when the temperature sensor fails.

1 is a perspective view schematically showing a configuration of a battery module according to an embodiment of the present invention.
2 is a partially exploded perspective view of the cell assembly in the configuration of FIG.
3 is a perspective view showing a temperature measurement unit, a sensing assembly and upper and lower cartridges according to an embodiment of the present invention.
4 is a perspective view showing an upper cartridge and a temperature sensor portion in which a secondary battery is disposed in a lower portion in FIG.
5 is an enlarged perspective view showing a state in which the temperature sensor is inserted into the cut-out portion of the upper cartridge in Fig.
FIG. 6 is a perspective view of a cartridge according to an embodiment of the present invention, viewed from the bottom to the top. FIG.
7 is a part of a schematic cross-sectional view according to the direction in which the temperature sensor is inserted in the battery module according to the embodiment of the present invention.
8 is an enlarged view of a portion A in Fig.
9 is a schematic configuration diagram of a sensor pressing portion according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be construed as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The embodiments of the present invention are provided to explain the present invention more fully to the ordinary artisan, so that the shape and size of the components in the drawings may be exaggerated, omitted or schematically shown for clarity. Thus, the size or ratio of each component does not entirely reflect the actual size or ratio.

FIG. 1 is a perspective view schematically showing a configuration of a battery module according to an embodiment of the present invention. FIG. 2 is a perspective view of a configuration of FIG. Fig. 4 is an enlarged view of the main part of Fig. 3. Fig.

Referring to FIGS. 1 to 3, a battery module according to an embodiment of the present invention includes a cell assembly 100, a sensing assembly 200, and a temperature measurement unit 300.

The cell assembly 100 is a collection of secondary batteries 120 having a plurality of secondary batteries 120. Particularly, the cell assembly 100 may include a plurality of pouch-shaped secondary batteries 120 as the secondary batteries 120. The plurality of pouch-shaped secondary batteries 120 may be arranged in one direction, for example, as shown in FIG. 2 And can be stacked in the vertical direction.

Each of the pouch type secondary batteries 120 may include an electrode lead 121. The electrode lead 121 may include a cathode lead 121a and a cathode lead 121b. Here, each of the electrode leads 121 is formed in a plate shape and extends to the outside of the pouch outer casing. In particular, the electrode leads 121 of each pouch-type secondary battery 120 may extend in the horizontal direction and be bent in the vertical direction. In this way, the electrode leads 121 of the secondary battery 120, 121, respectively. The two electrode leads 121 that are in contact with each other can be fixed to each other through welding or the like, and electrical connection between the secondary batteries 120 in the cell assembly 100 can be achieved.

Meanwhile, the cell assembly 100 may include a stacking cartridge 110 for stacking a plurality of pouch-shaped secondary batteries 120. The cartridge 110 is a component used for stacking the secondary batteries 120. The cartridge 110 is configured to hold the secondary batteries 120 to prevent the secondary batteries 120 from flowing and to stack the secondary batteries 120 to guide assembly of the secondary batteries 120 have. The cartridge 110 may include a cooling plate 113 and a main frame 111. [

The cooling plate 113 is located at a central portion of the cartridge 110 and is made of a thermally conductive material such as aluminum to absorb heat generated from the secondary battery 120 and to transfer the cooling fluid to the air or the like.

The main frame 111 may be located on the outer periphery of the cooling plate 113 in the form of a square ring having a hollow center portion and made of a plastic material such as to form the rim of the cartridge 110. Particularly, the main frame 111 is located on the side surface of the secondary battery 120 and can protect the lateral direction of the secondary battery 120 from the outside.

In this embodiment, one secondary battery 120 may be mounted on the upper portion of the cartridge 110. In addition, one secondary battery 120 may be seated in the lower portion of the cartridge 110. At this time, as shown in FIG. 2, the secondary battery 120 can be positioned so that the cathode lead 121a and the anode lead 121b protrude to the right. Hereinafter, one side of the main frame 111 positioned in the direction in which the positive electrode lead 121a and the negative electrode lead 121b are exposed to the outside will be referred to as a first frame 112. [

The sensing assembly 200 can be mounted on one side of the cell assembly 100, that is, the cartridge 110 stack of the exposed portion of the cell assembly 100. The sensing assembly 200 is electrically connected to the electrode leads 121 of the secondary battery 120, that is, the positive electrode leads 121a and / or the negative electrode leads 121b, Can be sensed. In particular, the sensing assembly 200 may be electrically connected to the secondary battery 120 to sense the voltages of the secondary battery 120 and the secondary battery 120 group. For example, the sensing assembly 200 is connected to the positive electrode lead 121a and the negative electrode lead 121b of all the secondary cells 120 provided in the cell assembly 100, As shown in FIG.

The sensing assembly 200 may be made of an electrically conductive material such as copper or aluminum and may be connected to the positive electrode lead 121a or the negative electrode lead 121b of the secondary battery 120 or the electrode lead 121, And each connecting member 220 is in contact with the electrode lead 121 of each of the plurality of secondary batteries 120 or the bus bar connecting between such electrode leads 121, Lt; / RTI >

The sensing assembly 200 may transmit sensing information about an electrical characteristic such as a voltage of the secondary battery 120 to another device outside the battery module. For example, a device such as a battery management system (BMS) may be connected to the battery module to control operation of the battery module such as charging or discharging. At this time, the sensing assembly 200 may be connected to the BMS to provide sensed voltage information and the like of the secondary battery 120 to the BMS, and the BMS can control the battery module based on this information.

The sensing assembly 200 may include a connector on one side thereof for transmitting voltage sensing information to the outside of the battery module. In this case, the connection terminal of the cable connected to the BMS is inserted into this connector, so that the information sensed by the sensing assembly 200 can be transmitted to the BMS.

The sensing assembly 200 may further include a cover member for fixing the connection member 220 and protecting the connection member 220 and the electrode lead 121. In particular, the cover member may be made of an electrically non-conductive material such as plastic, and may be configured to secure external insulation of the connection member 220 and the electrode lead 121. [

In addition, the sensing assembly 200 may be formed with a temperature sensor slot 210. Particularly, the temperature sensor slot 210 may be formed to penetrate through the inner and outer portions of the battery module. In other words, the temperature sensor slot 210 is formed in the sensing assembly 200 and can be configured to be formed in a direction toward the inside of the battery module from outside the battery module. For example, as shown in FIGS. 1 and 3, when the sensing assembly 200 is mounted on the right side of the battery module, the temperature sensor slot 210 may be formed in the left-right direction. And the temperature sensor slot 210 may be formed at a position where the sensor is opposed to the cutout 114 of the cartridge 110 having the pressing portion 116. [ In other words, the temperature sensor slot 210 may be provided in the sensing assembly 200 so that the sensor to be described later at the time of assembling the battery module is located at the same height as the cartridge 110 in which the pressing portion 116 is provided.

The temperature measurement unit 300 is a component capable of measuring the temperature inside the battery module in the battery module. In particular, the temperature measurement unit 300 can be configured to measure the temperature of the secondary battery 120 disposed inside the battery module. In this embodiment, the temperature measuring unit 300 includes a temperature sensor 310, a connector 320 connected to the BMS module, and a temperature sensor 310. The temperature sensor 310 is connected to the secondary battery 120, And a cable 330 for the temperature sensor.

In this embodiment, the temperature sensor 310 may be implemented using a thermistor. The thermistor 310 may be formed by mixing and sintering oxides such as manganese, nickel, cobalt, chromium, and iron. Such a thermistor 310 is advantageous in that it is small in size and can be measured even at a rapid temperature change or a fine temperature change.

The temperature information measured by the temperature sensor 310 can be transmitted to another device outside the battery module. For example, when the temperature is measured by the temperature sensor 310, the measured temperature information may be transmitted to the BMS outside the battery module and used to control the battery module.

As described above, the sensing assembly 200 may be formed with a temperature sensor slot 210 through which the temperature sensor 310 is inserted into the cell assembly 100 through the temperature sensor slot 210 of the sensing assembly 200. , And can be pulled out or drawn out. In other words, the temperature sensor 310 may be mounted on the battery module in a manner that the sensing assembly 200 is mounted to the cell assembly 100 and then inserted inward from the outside of the battery module.

Therefore, according to this aspect of the present invention, it is very easy to assemble the temperature measurement unit 300, and it is possible to prevent the temperature measurement unit 300 from being damaged or broken during the assembly of the temperature measurement unit 300. Further, according to this aspect of the present invention, the separation of the temperature measurement unit 300 can be simplified. It is also possible to separate only the temperature measurement unit 300 and replace it with another temperature measurement unit 300 without detaching the sensing assembly 200 from the cell assembly 100 when the temperature measurement unit 300 fails .

However, the scope of the present invention is not necessarily limited to these matters. In other words, unlike the present embodiment, the temperature sensor 310 may be provided so as to be able to be pulled out of the cell assembly 100 directly and collectively without passing through the temperature sensor slot 210 of the cell assembly 100.

Meanwhile, in the present invention, each pouch type secondary battery 120 may be configured such that the positive electrode lead 121a and the negative electrode lead 121b protrude in one direction. The temperature sensor 310 of the temperature measuring unit 300 may be disposed in a space between the cathode lead 121a and the anode lead 121b with respect to the cell assembly 100 in which the unidirectional secondary battery 120 is stacked have.

According to this configuration of the present invention, since the temperature around the electrode lead 121, which is the highest temperature portion in the secondary battery 120, can be measured, more accurate temperature measurement of the secondary battery 120 can be performed . Particularly, when the temperature sensor 310 is disposed between the positive electrode lead 121a and the negative electrode lead 121b, the temperature around the positive electrode lead 121a and the negative electrode lead 121b is measured by one temperature sensor 310 , Enabling efficient temperature measurement.

Preferably, the temperature sensor 310 may be included more than once in one battery module. The plurality of temperature sensors 310 may be spaced apart from each other by a predetermined distance in the vertical direction. For example, as shown in FIGS. 1 and 3, two temperature sensors 310 may be included in the battery module, one of which is located at the top of the battery module and the other is located at the bottom of the battery module (See FIG. 7).

Since the plurality of secondary batteries 120 are stacked on the battery module, the temperature of each secondary battery 120 may vary depending on the position, degree of deterioration, damage or the like. At this time, when a plurality of temperature sensors 310 exist in the battery module and each temperature sensor 310 measures the temperature of different parts, as in the present embodiment, accurate and precise temperature measurement can be performed .

Particularly, in the present invention, the temperature sensor 310 may be configured to contact the exterior material of the secondary battery 120. The temperature of the secondary battery 120 can be accurately measured as the temperature of the secondary battery 120 approaches the secondary battery 120. Therefore, when the temperature sensor 310 is configured to contact the exterior material of the secondary battery 120, Can be measured most accurately.

For this, a sensor 116 may be further included in the cartridge 110 to which the temperature sensor 310 is connected in the cell assembly 100 according to the present invention.

4 is a perspective view showing a portion of the upper cartridge 110a and the temperature sensor 310 in which the secondary battery 120 is disposed in the lower portion of FIG. 3. FIG. 5 is a perspective view of the cut- 6 is a perspective view of the upper cartridge 110a according to the embodiment of the present invention, viewed from the lower side to the upper side, and FIG. 7 is a perspective view showing the state where the temperature sensor 310 is inserted FIG. 8 is a partially enlarged view of a portion A of FIG. 7; FIG. 8 is a partial cross-sectional view of the battery module according to an embodiment of the present invention taken along the direction in which the temperature sensor 310 is inserted;

4 to 6, each of the first frame 112 of the upper cartridge 110a and the first frame 112 of the lower cartridge 110b according to the present invention is formed such that the body is partly cut inward in the middle region A tunnel is formed so that the cathode lead 121a and the cathode lead 121b of the secondary battery 120 can be exposed to the outside in the region where the formed cutout part 114 and the cutout part 114 are sandwiched, And a tunnel part 115 which is connected to the tunnel. And the pressing portion 116 of the sensor may be formed on the inner side of the cut- Therefore, the pressing portion 116 of the sensor is positioned directly above the outer peripheral sealing portion 122 of the secondary battery 120 positioned between the cathode lead 121a and the anode lead 121b.

The sensor pressing portion 116 according to the present embodiment includes a pressing plate 116a extending in the form of a cantilever at the inner wall of the cutout portion 114 and a pressing plate 116a, And a pressing member 116b protruding from the surface of the pressing member 116b.

The pressing plate 116a extends in the horizontal direction at the inner wall of the cut-out portion 114, but has a free end, so that it has an elastic force and a restoring force when a force is applied in the vertical direction. On the other hand, in this embodiment, the pressing plate 116a is formed integrally with the cut-out portion 114. [ However, unlike the present embodiment, the pressing plate 116a may be fitted to the inner wall of the cut-out portion 114. [ For example, when the pressure plate 116a is detachably assembled to the cut-out portion 114, the pressure portion 116 can be easily attached to any one of the cartridges 110 whenever necessary.

The pressing member 116b may protrude from the surface of the pressing plate 116a by pressing the temperature sensor 310 and pressing it. The pressing member 116b protrudes downward from the surface of the pressing plate 116a in accordance with the arrangement of the secondary battery 120 and the position of the temperature sensor 310, Or may protrude upward from the surface of the plate 116a. The pressing member 116b may be integrally formed with the pressing plate 116a.

4 and 5, a predetermined gap exists between the pressing member 116b and the surface of the sealing portion 122 of the secondary battery 120. The temperature sensor 310 detects a temperature difference And may be introduced into the gap through the sensor slot 210. At this time, when the temperature sensor 310 is drawn into the gap, the pressing plate 116a is deformed, and the deformed pressing plate 116a generates an elastic restoring force. The elastic restoring force is transmitted to the pressing member 116b so that the pressing member 116b presses the temperature sensor 310. [ In this way, the temperature sensor 310 is elastically biased toward the surface of the secondary battery 120, so that the temperature sensor 310 can be disposed in contact with the surface of the sealing portion 122 of the secondary battery 120.

6 to 8, the pressing member 116b may be provided as a round or semicircular protrusion in this embodiment. The temperature sensor 310 can be easily inserted and the temperature sensor 310 can be prevented from being damaged due to contact with the pressure sensitive member because the pressure sensitive member 116b is formed in a streamlined shape such as a round shape or a semicircular shape . When the gap between the pressing member 116b and the surface of the sealing portion 122 of the secondary battery 120 is too large, the pressing member 116b sufficiently pressurizes the temperature sensor 310 even if the temperature sensor 310 is retracted It is preferable to appropriately select the thickness of the pressing member 116b projecting from the pressing plate 116a. In this embodiment, the pinched member 116b is provided in parallel to the surface of the pressing plate 116a. Alternatively, the pinched member 116b may be provided in one or more than three protrusions.

The cartridge 110 may be provided with a hook 117 for preventing the temperature sensor 310 from detaching from the cutout 114 of the first frame 112.

 As shown in FIGS. 5 and 6, the cut-out portion 114 may have one or more hooks 117. A hooking protrusion 311 may be formed on a predetermined portion of the temperature sensor 310, for example, on both sides of the temperature sensor 310 so that the hook 117 can be fastened. In this case, when the temperature sensor 310 is inserted into the cutout 114 of the cartridge 110 and reaches a predetermined position, the hook 117 is caught by the hooking jaw 311 of the temperature sensor 310, The sensor 310 may become difficult to retract in the right direction.

The temperature sensor 310 is prevented from being easily detached from the cut-out portion 114 after being inserted into the cut-out portion 114 of the cartridge 110, so that the fixing force of the temperature sensor 310 Can be strengthened.

9 is a schematic configuration diagram of a sensor pressing portion according to another embodiment of the present invention.

7 to 8 denote the same members, and a duplicate description of the same members will be omitted. The present embodiment differs from the above-described embodiment only in the configuration of the sensor pressurizing portion. In other respects, the configuration of the present embodiment is the same as that of the above embodiment, and therefore, differences from the above embodiment will be mainly described below.

9, the sensor pressing portion 116 'according to another embodiment of the present invention may include a base plate 116'a, an elastic member 116'c, and a pressing member 116'b. have.

The base plate 116'a may be formed to extend in the horizontal direction at the inner wall of the cut-out portion 114 in a configuration corresponding to the pressing plate 116a of the above-described embodiment. Here, the base plate 116'a may have the same cantilever structure as the above-described pressing plate 116a, but more preferably both ends are provided as fixed ends. That is, in the present embodiment, the pressing portion 116 'of the sensor includes a separate elastic member 116'c that can be expanded and contracted, so that the base plate 116'a, unlike the above-described embodiment, It is not necessary to provide a fixed end at both ends, which may be advantageous in terms of structural stability. Further, the base plate 116'a may further include a tube portion 116'd into which the elastic member 116'c is inserted.

The elastic member 116'c is configured to transmit an elastic force to the pressing member 116'b. The elastic member 116'c may be a material having a self-restoring force, such as a spring, which is contracted or stretched in a direction in which pressure is applied. One end of the elastic member 116'c may be coupled to the base plate 116'a and the other end may be coupled to the pressing member 116'b.

The pressing member 116'b is a portion which is in direct contact with the temperature sensor 310 as in the above-described embodiment, and the contact surface may be provided in a round shape. According to the pressing portion 116 'of the sensor according to the present embodiment, the temperature sensor 310 presses the pressing member 116'b connected to the elastic member 116'c to press the secondary battery outer circumferential sealing portion 122 Stable contact makes it possible to measure temperature more precisely.

The battery module according to the present invention may further include an inlet duct and an outlet duct, in addition to the secondary battery 120 and the secondary battery cartridge 110, although not shown for convenience of illustration.

Here, the inflow duct may be provided in an opening portion of the cooling passage formed in the cartridge 110, and can function as a space and a passage for allowing the fluid to flow into the cooling passage. The outlet duct is provided in another opening portion of the cooling passage formed in the cartridge 110, and can function as a space and a passage for allowing the fluid flowing in the cooling passage to flow out of the battery module. Particularly, the cartridge 110 of the cell assembly according to an embodiment of the present invention may have an opening formed in a side surface of the main frame 111. The inlet duct and the outlet duct may be provided on the side where the opening is formed have. On the other hand, the inlet duct and the outlet duct may be provided with a fan to facilitate the flow of the cooling fluid.

The battery pack according to the present invention may include at least one battery module according to the present invention. In addition, the battery pack according to the present invention may include a case for accommodating such a battery module, various devices for controlling charge and discharge of the battery module, such as a battery management system (BMS), a current sensor, a fuse, . ≪ / RTI >

The battery module according to the present invention can be applied to an automobile such as an electric car or a hybrid car. That is, the automobile according to the present invention may include a battery module according to the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

In the present specification, when terms such as upward, downward, leftward, rightward, forward, and backward are used, these terms are for convenience of explanation only and are not limited to the position of the object to be viewed or the position of the observer It is apparent to those skilled in the art that the present invention is not limited thereto.

100: cell assembly
110: Cartridge
111: main frame, 112: first frame
113: cooling plate
114: cut-out portion, 115: tunnel portion
116: pressure sensor 117: hook
116a: pressing plate, 116b:
120: secondary battery
121: electrode lead
122: sealing part
200: sensing assembly 220: connecting member
210: Temperature sensor slot
300: Temperature measuring unit
310: Temperature sensor, 320: Connector, 330: Cable for temperature sensor

Claims (15)

A cell assembly comprising: a secondary battery; a plurality of cartridges on which the secondary batteries are stacked and which are stacked one on another; And
And a temperature measuring unit provided in the cell assembly so as to be able to be drawn in or drawn out and having a temperature sensor for measuring the temperature of the secondary battery,
Wherein at least one of the plurality of cartridges has a sensor pressing portion for pressing the temperature sensor to contact the surface of the secondary battery when the temperature sensor is drawn into the cell assembly. The method according to claim 1,
The sensor-
And a pressing member which is provided at one side of the main frame forming the rim of the cartridge to have an elastic force and elastically biases the temperature sensor toward the surface of the secondary battery. 3. The method of claim 2,
The main frame includes:
And a first frame in which the temperature sensor is partially inserted through a cut-out portion formed by partially cutting the body in an inner direction, and the sensor pressing portion is provided in the cut-out portion. The method of claim 3,
The sensor-
And a pressing plate extending in a cantilevered manner from one side of the cutout portion,
Wherein the pressing member protrudes from the surface of the pressing plate. 5. The method of claim 4,
Wherein the pressing member is at least one protrusion provided in a round shape. 5. The method of claim 4,
Wherein the pressing plate and the pressing member are integrally formed. The method of claim 3,
The sensor-
A base plate provided in the cutout portion in a horizontal direction; And
And an elastic member coupled to the base plate and extendable and retractable in the up and down direction, and is coupled to an end of the elastic member. The method of claim 3,
And the cut-out portion is formed in the center region of the first frame. The method of claim 3,
The first frame may further include a hook for preventing the temperature sensor from departing from the cutout portion,
Wherein the temperature sensor is formed with at least one side portion with a hooking jaw which is engaged with the hook. The method according to claim 1,
And a sensing assembly having at least one temperature sensor slot through which the temperature sensor passes and sensing a electrical characteristic of the secondary battery mounted on one side of the cell assembly. 11. The method of claim 10,
Wherein the temperature sensor slot is formed at a height corresponding to the cartridge having the sensor pressing portion. The method according to claim 1,
The temperature measuring unit includes:
A connector connected to the BMS module; And
And a cable connecting the connector and the temperature sensor. The method according to claim 1,
Wherein the temperature sensor is a thermistor. A battery pack comprising the battery module according to any one of claims 1 to 13. An automobile comprising a battery module according to any one of claims 1 to 13.

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