Temperature sensing member, and battery module and battery pack including same

Abstract

A temperature sensing member according to one embodiment of the present disclosure includes: a main body portion positioned between two adjacent battery cells and disposed parallel to one surface of the battery cells; the battery pack includes a main body portion having a plate shape, and a temperature measuring portion mounted to the main body portion and measuring a temperature of the battery cell, in which the main body portion has a plate shape, and the temperature measuring portion is inserted into one side of the main body portion.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2021-0170978 filed in the Korean Intellectual Property Office on December 2, 2021, the entire contents of which are incorporated herein by reference.

[0003] The present disclosure relates to a temperature sensing member, a battery module and a battery pack including the same, and more particularly to a temperature sensing member in which a sensing error is minimized, a battery module and a battery pack including the same. Background Art

[0004] In modern society, portable devices such as mobile phones, laptops, camcorders, and digital cameras have been used daily, and the development of technology in the field of mobile devices has started. In addition, rechargeable / dischargeable secondary batteries are used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (P-HEVs), etc., in an attempt to solve problems such as air pollution caused by existing gasoline vehicles using fossil fuels. Therefore, the demand for the development of secondary batteries is growing.

[0005] Currently commercialized secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries and lithium secondary batteries. Among them, lithium secondary batteries have attracted much attention due to their advantages such as free charge and discharge, extremely low self-discharge rate and high energy density.

[0006] Meanwhile, in the case of secondary batteries for small devices, two to three battery cells are arranged, but in the case of secondary batteries for medium and large devices (e.g., automobiles), medium and large battery modules or battery packs in which a large number of battery cells are electrically connected are used. Since medium and large battery modules are preferably manufactured to be as small in size and weight as possible, prismatic batteries, pouch-type batteries, or similar batteries are mainly used as battery cells of medium and large battery modules, which can be stacked in a highly integrated manner and have a small weight relative to capacity.

[0007] At the same time, if some battery cells in a battery module or battery pack are in an overvoltage, overcurrent or overheating state, it will seriously affect safety and operating efficiency. Therefore, voltage sensors, temperature sensors, etc. can be introduced into the battery module or battery pack, and the operating status of the battery cells can be checked in real time or periodically through pressure sensors or temperature sensors.

[0008] Figure 1 is a schematic diagram showing a temperature sensor provided in a conventional battery module.

[0009] See also Figure 1, the temperature sensor 20 provided in the conventional battery module may be mounted on the housing 10. The housing 10 has a boundary shape that wraps around the periphery of the battery cell stack in which the battery cell stack is located, and the temperature sensor 20 may be arranged to extend from one point of the housing 10 toward the inside of the housing 10 where the battery cell is located. Therefore, the temperature sensor 20 may be arranged between two adjacent battery cells and may detect the temperature of one side of the battery cell.

[0010] The battery module is provided with a temperature sensor 20 mounted on the housing 10 so that the temperature sensor 20 can be stably arranged between the battery cells. However, when a swelling phenomenon occurs in the battery cells due to overvoltage, overcurrent or overheating of the battery cells, as the separation space between the battery cells is reduced, the temperature sensor 20 and the battery cells can be pressed against each other, which may cause problems such as damage to the battery cells or the temperature sensor 20 erroneously measuring the temperature of the battery cells.

[0011] Therefore, a new structure and shape of the temperature sensor 20 is needed, which will not over-compress the battery cell even when bearing the expansion stiffness of the battery cell. Utility Model Content

[0012] Technical issues

[0013] An object of the present disclosure is to provide a temperature sensing member which does not excessively press a battery cell even when subjected to expansion stiffness of a battery cell.

[0014] However, the technical problems to be solved by the embodiments of the present disclosure are not limited to the above problems, and various extensions can be made within the scope of the technical concept included in the present disclosure.

[0015] Technical Solution

[0016] According to one embodiment of the present disclosure, there is provided a temperature sensing member located between two adjacent battery cells, the temperature sensing member comprising: a main body portion arranged parallel to one surface of the battery cell; and a temperature measuring unit mounted on the main body portion and measuring the temperature of the battery cell, wherein the main body portion has a plate shape, and wherein the temperature measuring unit is inserted into one side of the main body portion.

[0017] One side of the body portion into which the temperature measuring unit is inserted may have a protruding shape.

[0018] The temperature measuring unit includes a temperature sensor, and the temperature sensor may be located at a first point of the body portion.

[0019] The first point is a point located within a first distance from a side of the body portion into which the temperature measuring unit is inserted, and a value of the first distance may be 5% to 20% of the length of the body portion.

[0020] The temperature measuring unit includes a connector for making an electrical connection with an external device, and the connector may be arranged to protrude from the main body portion.

[0021] The thickness of the body portion may be 0.3 mm to 0.7 mm.

[0022] The main body may be made of polypropylene (PP) or polycarbonate (PC).

[0023] According to another embodiment of the present disclosure, there is provided a battery module including the above-mentioned temperature sensing member.

[0024] According to yet another embodiment of the present disclosure, there is provided a battery pack including the above-mentioned temperature sensing member.

[0025] Beneficial effects

[0026] According to the embodiment, the temperature sensing member having the minimized thickness may prevent the battery cell from being damaged when a swelling phenomenon occurs and minimize a temperature measurement error.

[0027] The effects of the present disclosure are not limited to the above-mentioned effects, and those skilled in the art can clearly understand additional other effects not mentioned above from the description of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a view showing a temperature sensor provided in a conventional battery module;

[0029] Figure 2 is a perspective view of a temperature sensing member according to an embodiment of the present disclosure;

[0030] Figure 3 yes Figure 2 a top view and a side view of a temperature measuring unit included in a temperature sensing member;

[0031] Figure 4 It shows that the Figure 2 a view of a connection portion between a main body portion and a temperature measuring unit in a temperature sensing member;

[0032] Figure 5 It shows Figure 2 A view of an example in which a temperature sensing member is disposed between battery cells;

[0033] Figure 6 It is used to explain Figure 2A view showing a relative position between a temperature sensor included in a temperature sensing member and a battery cell;

[0034] Figure 7 is a schematic diagram showing an experiment and results of checking whether a temperature sensing member and a battery cell are damaged when a swelling phenomenon occurs in the battery cell; and

[0035] Figure 8 It indicates that the settings have Figure 2 FIG. 1 is a view of one example of a temperature sensing member of a battery module. DETAILED DESCRIPTION

[0036] Various embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings so that those skilled in the art can easily implement them. The present disclosure can be modified in various ways and is not limited to the embodiments described herein.

[0037] Parts irrelevant to the description will be omitted in order to clearly describe the present disclosure, and like reference numerals refer to like elements throughout the description.

[0038] In addition, in the drawings, the size and thickness of each element are arbitrarily shown for ease of description, and the present disclosure is not necessarily limited to the elements illustrated in the drawings. In the drawings, the thickness of each layer, region, etc. is exaggerated for clarity. In the drawings, the thickness of parts and regions is exaggerated for ease of description.

[0039] Furthermore, it is understood that when an element (e.g., a layer, film, region, or plate) is referred to as being "on" or "above" another element, the element may be directly on the other element or other intervening elements may be present. In contrast, when an element is referred to as being "directly on" another element, it is meant that no other intervening elements are present. Furthermore, a portion being "above" or "on" a reference portion means that the portion is located above or below the reference portion, and does not specifically mean that the portion is "above" or "on" facing in the opposite direction of gravity. At the same time, similar to the case described as being disposed "on" or "above" another portion, the case described as being disposed "below" or "beneath" another portion may also be understood with reference to the above.

[0040] Furthermore, throughout the description, when a portion is referred to as “including” or “comprising” a certain component, unless otherwise specified, it means that the portion may further include other components, rather than excluding the other components.

[0041] Furthermore, throughout the description, when referred to as a “plane”, it means observing the target portion from the upper side; and when referred to as a “cross section”, it means observing the target portion from the side of the cross section cut vertically.

[0042] Now, a temperature sensing member according to one embodiment of the present disclosure will be described.

[0043] Reference Figures 2 to 5 The temperature sensing member 200 of this embodiment can be used to measure the temperature of the battery cells 110 in a battery pack or battery module. The temperature sensing member 200 of this embodiment can be inserted between the battery cells 110 in a battery pack or battery module to measure the temperature of a specific position of the battery cell 110.

[0044] The temperature sensing member 200 of the present embodiment may include a body part 210 arranged parallel to one surface of the battery cell 110 and a temperature measuring unit 220 mounted on the body part 210 and measuring the temperature of the battery cell 110 .

[0045] The main body 210 may have a thin plate shape. Figure 5 As shown, the body part 210 may be inserted between two adjacent battery cells 110. The body part 210 may cover one surface of the battery cell 110. The body part 210 may contact one surface of the battery cell 110.

[0046] Preferably, the main body 210 completely corresponds to one surface of the battery cell 110. Preferably, the main body 210 may completely cover one surface of the battery cell 110. The main body 210 may have a shape similar to one surface of the battery cell 110. The main body 210 may have a width and length similar to one surface of the battery cell 110.

[0047] If the main body 210 is set to be smaller than one surface of the battery cell 110, the main body 210 may cause a distance deviation between two adjacent battery cells 110, thereby applying a large pressure to a specific portion during the expansion of the battery cell 110, which may damage the battery cell 110 or the temperature sensing member 200. In addition, when the main body 210 is arranged at a slightly larger distance from the lower edge, the position of the main body 210 fluctuates due to gravity, which may make it difficult to measure the temperature at a position intended by the designer. Therefore, preferably, the main body 210 can cover 70% or more, 80% or more, or 90% or more of one surface of the battery cell 110.

[0048] The main body 210 may be a plate-like member having a thickness. The thickness of the main body 210 may be 0.3 mm to 0.7 mm, preferably 0.4 mm to 0.6 mm. If the thickness of the main body 210 is greater than 0.7 mm, the space between two adjacent battery cells 110 may be widened, thereby possibly increasing the total volume of the battery cell stack in which the battery cells 110 are stacked. In addition, if the thickness of the main body 210 is less than 0.3 mm, it may be difficult to mount the temperature measurement unit 220 on the main body 210.

[0049] The body portion 210 may be designed to have a uniform thickness, but may also be designed to have a non-uniform thickness to accommodate volume changes of the battery cell 110 during expansion of the battery cell 110. For example, the body portion 210 may be designed such that the thickness at the edge is greater than the thickness at the center.

[0050] The main body 210 may be made of a material having a certain level of rigidity so that the main body does not excessively squeeze the battery cell 110 when the volume of the battery cell 110 changes, or even does not excessively deform due to pressure applied to the main body 210. For example, the main body 210 may be made of polypropylene (PP) or polycarbonate (PC), or may be made of other materials having similar physical properties.

[0051] See also Figure 3 , the temperature measuring unit 220 may include a temperature sensor 222 for measuring temperature, a connector 226 for forming an electrical connection with an external device, and a wire 224 for electrically connecting the temperature sensor 222 and the connector 226. In addition, a molded or injection-molded product made by introducing a thermoplastic resin may be located between the temperature sensor 222 and the wire 224. Examples of the thermoplastic resin used here include TPS, TPV, TPO, TPU, TPEE, and the like.

[0052] The temperature sensor 222 can measure the temperature of the battery cell 110 by being attached or closely attached to one surface of the battery cell 110. The temperature sensor 222 can be a thermistor whose resistance changes with temperature, but this is not necessarily the case. Any sensor that can measure temperature can be applied regardless of its type.

[0053] See also Figure 4, the temperature measuring unit 220 may be mounted on one side of the main body 210. An insertion groove 212 into which the temperature measuring unit 220 may be inserted may be provided on one side of the main body 210, and the temperature measuring unit 220 may be inserted into the main body 210 so that the temperature sensor 222 is located inside the main body 210. The connector 226 may protrude from the main body 210 and be located outside the main body 210, and the position of the wire 224 may be fixed at the edge of the main body 210 by a fixing member such as a tape.

[0054] One side of the main body 210 into which the temperature measuring unit 220 is inserted may protrude in the longitudinal direction. Thus, the temperature measuring unit 220 can be stably mounted on the main body 210, and the temperature measuring unit 220 in a slightly elongated shape can be protected. In addition, since the connector 226 of the temperature measuring unit 220 must protrude to the outside of the main body 210 in order to be connected to an external device, one side of the main body 210 has a protruding shape so that the connector 226 can be fixed or supported more stably.

[0055] The thickness of the temperature measurement unit 220 may be similar to the thickness of the main body 210. The temperature sensor 222, the wire 224, and the connector 226 may have a thickness of 0.3 mm to 0.7 mm, preferably 0.4 mm to 0.6 mm. The more similar the thickness of the temperature measurement unit 220 is to the thickness of the main body 210, the easier it is to perform temperature measurement on the battery cell 110 through the temperature measurement unit 220, and during the expansion of the battery cell 110, the temperature measurement unit 220 may not damage the battery cell 110, or may not be damaged by the battery cell 110.

[0056] Here, the thickness of the temperature measuring unit 220 may be calculated based on the thickness direction of the body part 210 or the stacking direction of the battery cells 110. The thickness of the temperature measuring unit 220 may be based on a value measured on the xy plane, such as Figure 3 The thickness of the temperature measurement unit 220 may refer to a value in the y-axis direction relative to the x-axis direction.

[0057] Figure 6 It is used to explain Figure 2 FIG. 1 is a view showing the relative positions between a temperature sensor included in a temperature sensing member and a battery cell.

[0058] During charging and discharging, the battery cell 110 may generate heat, and the temperature of the battery cell 110 may differ depending on the position. The battery cell 110 may include a first electrode lead 111 and a second electrode lead 112 protruding to one side or the other side of the battery cell 110 housing. Since the electrode leads 111 and 112 are connected to the external bus bar, the temperature of the battery cell 110 may be high at a position close to the electrode leads 111 and 112. In addition, the temperature of the battery cell 110 may be higher at a position close to the second electrode lead 112 than at a position close to the first electrode lead 111. This may be caused by the direction of movement of the current.

[0059] Reference Figure 6 , a hot spot HS may be formed in the battery cell 110. The hot spot HS may be a location where the highest temperature occurs, which is relatively higher than other parts of the battery cell 110. The hot spot HS may refer to a location where the highest temperature occurs in an area of ​​the battery cell 110 that does not include the electrode leads 111 and 112. In the width direction (z-axis) of the battery cell 110, the location of the hot spot HS may be a location closer to the center than the edge. In the longitudinal direction (x-axis) of the battery cell 110, the location of the hot spot HS may be a location closer to the edge than the center. The location of the hot spot HS may be formed at a location that is a predetermined distance away from the second electrode lead 112 located on one side of the battery cell 110. Here, the predetermined distance may be a value of 5% to 20% of the total length of the battery cell 110 including the electrode leads 111 and 112. Since the electrode sheet connected to the electrode lead may be located within a range less than 5% of the total length from the second electrode lead 112, the corresponding range is appropriately excluded, and within a range greater than 20% of the total length, it may be difficult to form a hot spot HS due to the distance between the electrode sheet and the electrode leads 111 and 112.

[0060] The temperature sensor 222 of the temperature sensing member 200 may be arranged close to the hot spot HS of the battery cell 110. The temperature sensor 222 is arranged to correspond to the hot spot HS of the battery cell 110, whereby the temperature sensing member 200 may measure the maximum temperature of the battery cell 110 or a temperature close to the maximum temperature, and may prevent a thermal runaway phenomenon or the like due to heating of the battery cell 110 in advance.

[0061] The temperature sensor 222 of the temperature sensing member 200 may be located at a first point P1 of the main body 210. When the temperature sensing member 200 and the battery cell 110 are arranged parallel to each other, the first point P1 may be a point corresponding to the hot spot HS of the battery cell 110, or the periphery containing the hot spot HS. In the width direction (z axis), the first point P1 may be a position closer to the center than the edge of the main body 210. In the longitudinal direction (x axis) of the main body 210, the first point P1 may be a position closer to the edge than the center. The first point P1 may be located within a first distance from one side of the main body 210 into which the temperature measuring unit 220 is inserted. Here, the first distance may be a value within 5% to 20% of the total length of the main body 210. The first point P1 may correspond to the hot spot HS, and the total length of the main body 210 may be similar to the total length of the battery cell 110. Therefore, if the first distance is less than 5% of the total length or greater than 20% of the total length, it may be difficult for the first point P1 to correspond to the hot spot HS.

[0062] Figure 7 is a schematic diagram showing an experiment and results of checking whether a temperature sensing member and a battery cell are damaged when a swelling phenomenon occurs in the battery cell.

[0063] Figure 7 The experiment is used to confirm whether the pressure acting between the temperature sensing member 200 and the battery cell 110 increases when the battery cell expands, thereby causing damage to the temperature sensing member 200 and the battery cell 110. In this experiment, the temperature sensor 222 uses a thermistor, and similar to the actual assembly situation, the temperature sensing member 200 is located between the two battery cells 110. In addition, in the state of applying voltage, the battery cell 110 and the temperature sensing member 200 are squeezed at 1kN / min, and after reaching 16kN, the pressure is maintained for 5 minutes.

[0064] exist Figure 7 After the experiment, no damage is caused to the thermistor included in the temperature sensing member 200, and no depression or leakage is caused by the thermistor in the battery cell 110.

[0065] Reference Figure 7 According to the experimental results, when it is observed that the resistance value of the thermistor is constant even in the above-mentioned pressurized environment, it can be confirmed that the thermistor operates normally. Therefore, it can be confirmed that the temperature sensing member 200 provided in a plate shape does not damage the battery cell 110 even in an environment where the pressure increases due to expansion, and no sensing error occurs.

[0066] A battery module including the temperature sensing member of the present embodiment will be described below.

[0067] The battery module including the above-described temperature sensing member 200 may be provided in various forms.

[0068] In one example, the battery module may include a battery cell stack in which a plurality of battery cells 110 are stacked in one direction, a module frame accommodating the battery cell stack, and a temperature sensing member 200 located between adjacent battery cells 110 of the battery cell stack. The battery module may further include bus bar frames located on the front and rear surfaces of the battery cell stack, respectively, and end plates covering the bus bar frames and coupled to the module frame, and the battery module may have a closed structure via the module frame or the end plates.

[0069] In another example, the battery module may be provided in a module-less structure in which a module frame is omitted.

[0070] Typically, the battery module is housed in a battery pack and mounted on a device, whereby conventional battery cells are doubly protected by the module frame of the battery module and the battery pack frame of the battery pack. However, this dual assembly structure not only increases the manufacturing cost and manufacturing process of the battery pack, but also has the disadvantage of reduced reassembly capability when certain battery cells are defective. In addition, when there is a cooling member (e.g., a cooling member) outside the battery module, there is also the problem that the heat transfer path between the battery cell and the cooling member is slightly complicated.

[0071] However, if the battery module is set to a module-free structure, the battery cell stack can be directly connected to the battery pack frame of the battery pack. As a result, the structure of the battery pack can be made simpler, advantages can be obtained in terms of manufacturing cost and manufacturing process, and the weight of the battery pack can be reduced.

[0072] As described above, a battery module having an open structure in which a module frame is omitted may be referred to as a “battery cell block”.

[0073] Next, we will refer to Figure 8 The battery cell block type battery module is described in more detail.

[0074] Figure 8 It indicates that the settings have Figure 2 FIG. 1 is a view of one example of a temperature sensing member of a battery module.

[0075] Reference Figure 8 , the battery module 100 provided in this embodiment may have a module-less structure in which a module frame is omitted.

[0076] The battery module 100 of this embodiment may include a battery cell stack 120, a side surface plate 130, a retaining band 140, a bus bar frame 150 and a temperature sensing member 200, a plurality of battery cells 110 are stacked in the battery cell stack 120 along one direction, the side surface plate 130 is located at both ends of the battery cell stack 120 in the stacking direction, the retaining band 140 is wrapped around the side surface plate 130 and the battery cell stack 120 and fixes the shape, and the bus bar frame 150 covers the front and rear surfaces of the battery cell stack 120.

[0077] The battery cells 110 may each include an electrode assembly, a battery cell housing, and an electrode lead protruding from the electrode assembly. The battery cells 110 may be arranged in a bag-type or prismatic type that enables the maximum number of stacks per unit area. For example, a battery cell 110 arranged in a bag-type may be manufactured by accommodating an electrode assembly including a cathode, an anode, and a separator in a battery cell housing made of a laminate, and then heat-sealing the sealing portion of the battery cell housing. On the other hand, the accompanying drawings show that the cathode lead and the anode lead of the battery cell 110 protrude in opposite directions, but this is not necessarily the case. The electrode leads of the battery cell 110 may also protrude in the same direction.

[0078] The battery cell stack 120 may be formed by stacking a plurality of electrically connected battery cells 110 in one direction. The direction in which the plurality of battery cells 110 are stacked (referred to as "stacking direction") may be the y-axis direction (or -y-axis direction), and the expression "axis direction" may be interpreted as including + / - two directions.

[0079] Meanwhile, the battery cells 110 are arranged in one direction so that the electrode leads of the battery cells 110 may be located on one surface of the battery cell stack or on another surface facing the one surface. In this way, the surface on which the electrode leads are located in the battery cell stack 120 may be referred to as the front surface or the rear surface of the battery cell stack 120, and Figure 8 In FIG. 1 , the front surface and the rear surface of the battery cell stack 120 are shown by two surfaces facing each other on the x-axis. In addition, the surface on which the outermost battery cells 110 in the battery cell stack 120 are located may be referred to as the side surface of the battery cell stack 120, and Figure 8 , the side surface of the battery cell stack 120 is shown by two surfaces facing each other on the y-axis.

[0080] The side surface plate 130 may be provided to maintain the overall shape of the battery cell stack 120. The side surface plate 130 is a plate-shaped member and may supplement the rigidity of the battery cell block instead of the module frame. The side surface plate 130 may be arranged at both ends of the battery cell stack 120 along the stacking direction and may contact the outermost battery cells 110 on both sides of the battery cell stack 120.

[0081] The side surface plate 130 may be made of various materials and may be provided by various manufacturing methods. In one example, the side surface plate 130 may be a plastic material prepared by injection molding. In another example, the side surface plate 130 may be made of a leaf spring material. In yet another example, the side surface plate 130 may be made of a material having elasticity so that its shape can be partially deformed in response to the volume change of the battery cell stack 120 due to expansion.

[0082] The retaining band 140 may be used to fix the position and shape of the side surface plates 130 at the two side ends of the battery cell stack 120. The retaining band 140 may be a member having a length and a width. Specifically, the battery cell stack 120 may be located between the two side surface plates 130 in contact with the outermost battery cells 110, and the retaining band 140 may span the battery cell stack 120 and connect the two side surface plates 130. Thus, the retaining band 140 may prevent the distance between the two side surface plates 130 from increasing beyond a certain range, which allows the overall shape of the battery cell block to remain within a certain range.

[0083] The holding belt 140 may have hooks at both ends in the longitudinal direction for stably coupling with the side surface plate 130. These hooks may be formed by bending both ends in the longitudinal direction of the holding belt 140. On the other hand, hook grooves may be formed at positions on the side surface plate 130 corresponding to the hooks, and the holding belt 140 and the side surface plate 130 are stably coupled by coupling the hooks and the hook grooves.

[0084] The retaining band 140 may be provided using various materials or by various manufacturing methods. In one example, the retaining band 140 may be made of a material having elasticity so that a volume change of the battery cell group 120 due to expansion may be allowed within a certain range.

[0085] On the other hand, the retaining band 140 is used to fix the relative position between the side surface plate 130 and the battery cell stack 120, and if its purpose as a "fixing member" has been achieved, it can also be set in a form different from the figure. For example, the fixing member can be set in the form of an elongated bolt, that is, it can be set in the form of a long bolt that can span between the two side surface plates 130. The side surface plate 130 can be provided with a groove into which the long bolt can be inserted, and the long bolt can be connected to the two side surface plates 130 at the same time through the groove, thereby fixing the relative position of the two side surface plates 130. The long bolt can be set at the edge of the side surface plate 130, preferably at a position close to the vertex of the side surface plate 130. According to the design, the above-mentioned long bolt can be used instead of the retaining band 140, but both the retaining band 140 and the long bolt can also be provided to the battery cell block.

[0086] The busbar frame 150 may be located on one surface of the battery cell stack 120 to cover one surface of the battery cell stack 120 while guiding the connection between the battery cell stack 120 and an external device. The busbar frame 150 may be located on the front surface or the rear surface of the battery cell stack 120. Two busbar frames 150 may be provided to be located on the front and rear surfaces of the battery cell stack 120. Busbars may be mounted on the busbar frame 150, thereby connecting electrode leads of the battery cell stack 120 to the busbars so that the battery cell stack 120 can be electrically connected to an external device.

[0087] The bus bar frame 150 may include an electrically insulating material. The bus bar frame 150 may limit contact with other portions of the battery cell 110 except for a portion where the bus bar is coupled to the electrode lead, and may prevent an electrical short circuit from occurring.

[0088] like Figure 5 As shown, the temperature sensing member 200 may be located between two adjacent battery cells 110. Figure 8 As shown, when eight battery cells 110 form a battery cell stack 120, the temperature sensing member 200 may be disposed between the fourth and fifth battery cells 110. Since the center of the battery cell stack 120 may be difficult to dissipate heat, the temperature sensing member 200 is located at the center of the battery cell stack 120, thereby being able to measure the maximum temperature of the battery cell stack 120 or a temperature close to the maximum temperature, and preventing the thermal runaway phenomenon due to the heat of the battery cells 110 in advance. For a detailed description of the temperature sensing member 200, please refer to the above content.

[0089] Figure 8It is shown that only one temperature sensing member 200 is provided, but a plurality of temperature sensing members 200 may be provided in the battery module 100 according to the design. Preferably, the plurality of temperature sensing members 200 are arranged at equal intervals, but this is not necessarily the case. If there is a location where the temperature rise is concentrated in the battery cell stack 120, it may be most ideal to place the temperature sensing member 200 at that location.

[0090] Meanwhile, the battery module may be included in a battery pack. The battery pack may have a structure in which one or more battery modules in the battery module according to the present embodiment are aggregated and packaged together with a battery management system (BMS) and a cooling device that controls and manages the temperature, voltage, etc. of the battery.

[0091] The battery module and the battery pack including the battery module can be applied to various devices. Such devices can be applied to vehicles such as electric bicycles, electric vehicles or hybrid vehicles, but the present disclosure is not limited thereto, but can be applied to various devices that can use the battery module and the battery pack including the battery module, which also falls within the scope of the present disclosure.

[0092] Although the preferred embodiments of the present disclosure have been described in detail above, the scope of the present disclosure is not limited thereto, and those skilled in the art may make various modifications and improvements using the basic concepts of the present disclosure defined in the appended claims, which also fall within the scope of the present disclosure.

[0093] [Description of Reference Signs]

[0094] 100:Battery module

[0095] 110: Battery Cell

[0096] 120: Battery cell stack

[0097] 130: Side panel

[0098] 140:Retention belt

[0099] 150:Bus bar frame

[0100] 200: Temperature sensing component

[0101] 210: Main body

[0102] 220: Temperature sensing unit

Claims

1. A temperature sensing member, the temperature sensing member being located between two adjacent battery cells, characterized in that The temperature sensing member comprises: a main body portion arranged parallel to one surface of the battery cell; and a temperature measuring unit mounted on the main body and measuring a temperature of the battery cell, wherein the main body has a plate shape, wherein the temperature measuring unit is inserted into one side of the main body, and Wherein, a side of the main body into which the temperature measuring unit is inserted has a protruding shape.

2. The temperature sensing component according to claim 1, characterized in that: The temperature sensing unit includes a temperature sensor, and The temperature sensor is located at a first point of the body portion.

3. The temperature sensing component according to claim 2, characterized in that: The first point is a point located within a first distance from a side of the main body into which the temperature measuring unit is inserted, and The first distance has a value of 5% to 20% of the length of the main body portion.

4. The temperature sensing component according to claim 1, characterized in that: The temperature sensing unit includes a connector for forming an electrical connection with an external device, and The connector is arranged to protrude from the main body portion.

5. The temperature sensing component according to claim 1, characterized in that: The thickness of the main body is 0.3 mm to 0.7 mm.

6. The temperature sensing component according to claim 1, characterized in that: The main body is made of polypropylene (PP) or polycarbonate (PC).

7. A battery module, characterized in that The battery module includes the temperature sensing member according to claim 1.

8. A battery pack, characterized in that The battery pack includes the temperature sensing member according to claim 1.

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