Battery module and battery pack including the battery module

Abstract

A battery module according to one embodiment of the present disclosure includes: a battery cell stack in which a plurality of battery cells are stacked; a module frame that accommodates the battery cell stack; a first bus bar frame that is accommodated in the module frame and covers a front surface of the battery cell stack; and a second bus bar frame that is accommodated in the module frame and covers a rear surface of the battery cell stack, wherein a terminal bus bar is mounted to the first bus bar frame and a module connector is mounted to the second bus bar frame, and the module frame is formed with a vent portion that penetrates an upper plate of the module frame, and the vent portion is closer to the module connector than the terminal bus bar.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2020-0161480 filed on November 26, 2020, and Korean Patent Application No. 10-2021-0161637 filed on November 22, 2021, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entirety.

[0003] The present disclosure relates to a battery module and a battery pack including the same, and more particularly, to a battery module having enhanced safety and a battery pack including the same. Background Art

[0004] With the development of technology and the increase in demand for mobile devices, the demand for secondary batteries as energy sources is rapidly increasing, and thus, many studies on batteries that can meet various needs are emerging.

[0005] Secondary batteries have attracted considerable attention as energy sources for power-driven devices such as electric bicycles, electric vehicles, and hybrid electric vehicles, and for mobile devices such as mobile phones, digital cameras, and laptop computers.

[0006] Recently, as the demand for large-capacity secondary battery structures including utilizing secondary batteries as energy storage sources continues to rise, there is an increasing demand for multi-module structured battery packs as assemblies of battery modules in which a plurality of secondary batteries are connected in series / parallel.

[0007] In addition, when a plurality of battery cells are connected in series / parallel to configure a battery pack, a method of configuring a battery module including at least one battery cell and then adding other components to the at least one battery module to configure a battery pack is common. Since the battery cells constituting these medium or large battery modules include chargeable / dischargeable secondary batteries, such high-output, large-capacity secondary batteries generate a large amount of heat during charging and discharging.

[0008] The battery module may include a battery cell stack in which a plurality of battery cells are stacked, a frame for accommodating the battery cell stack, and end plates for covering the front and rear surfaces of the battery cell stack.

[0009] Figure 1 is a diagram showing the appearance of a battery module mounted on a conventional battery pack at the time of fire. Figure 2 It is along Figure 1 , which is a cross-sectional view taken along line AA of , is a cross-sectional view showing the appearance of a flame affecting adjacent battery modules during a fire in a battery module mounted on a conventional battery pack.

[0010] Reference Figure 1 and Figure 2 A conventional battery module includes a battery cell stack having a plurality of battery cells 10 stacked therein, a frame 20 for accommodating the battery cell stack, end plates 30 formed on the front and rear surfaces of the battery cell stack, a terminal bus bar 40 formed to protrude to the outside of the end plates 30, and the like.

[0011] The frame 20 and the end plate 30 may be combined so as to be sealed by welding. When the frame 20 and the end plate 30 for accommodating the battery cell stack are combined in this manner, the internal pressure of the battery cell 10 increases during overcharging of the battery module and exceeds the limit value of the fusion strength of the battery cell. In this case, high temperature heat, gas, and flame generated in the battery cell 10 may be discharged to the outside of the battery cell 10.

[0012] At this time, high temperature heat, gas and flame may be discharged through the opening formed in the end plate 30. However, in a battery pack structure in which a plurality of battery modules are arranged so that the end plates 30 face each other, high temperature heat, gas and flame ejected from the battery module may affect the battery module. As a result, the terminal bus bar 40 formed on the adjacent end plate 30 of the battery module may be damaged, and high temperature heat, gas and flame may enter the interior of the battery module through the opening formed in the adjacent end plate 30 of the battery module, thereby damaging the plurality of battery cells 10. Summary of the invention

[0013] Technical issues

[0014] An object of the present disclosure is to provide a battery module capable of dissipating high-temperature heat and flames exhausted when a fire phenomenon occurs inside a battery module, and a battery pack including the battery module.

[0015] However, the technical problems to be solved by the embodiments of the present disclosure are not limited to the above-mentioned problems, and can be variously extended within the scope of the technical ideas included in the present disclosure.

[0016] Technical Solution

[0017] According to one embodiment of the present disclosure, a battery module is provided, which includes: a battery cell stack in which a plurality of battery cells are stacked; a module frame that accommodates the battery cell stack; a first bus bar frame that is accommodated in the module frame and covers a front surface of the battery cell stack; and a second bus bar frame that is accommodated in the module frame and covers a rear surface of the battery cell stack, wherein a terminal bus bar is mounted to the first bus bar frame and a module connector is mounted to the second bus bar frame, and wherein the module frame is formed with a vent portion that penetrates an upper plate, and the vent portion is closer to the module connector than the terminal bus bar.

[0018] The exhaust portion has a hole structure formed in the upper plate, and the hole structure may penetrate the upper plate obliquely in a direction approaching the second bus bar frame.

[0019] The terminal bus bar may be connected to an external bus bar that provides connection to another battery module adjacent to the battery module including the terminal bus bar.

[0020] The exhaust portion may be formed to exhaust gas in a direction in which the second bus bar frame is located.

[0021] The exhaust portion includes: an inlet formed on an upper surface of the module frame and facing the battery cell stack; and a discharge port that discharges gas flowing in through the inlet, wherein the discharge port may be formed in a direction perpendicular to the inlet.

[0022] The exhaust portion includes a connection portion formed between the inlet and the outlet and guiding the gas flowing into the inlet in a direction where the outlet is located, and an upper surface of the connection portion may be formed to be inclined.

[0023] The vent portion may be formed to vent in an upward direction relative to the battery cell stack.

[0024] The exhaust portion includes: an inlet connected to the battery cell stack and formed in an upward direction on the upper surface of the module frame; an outlet formed in an upward direction and exhausting the gas flowing in through the inlet; and a connecting portion connecting the inlet and the outlet, wherein the connecting portion can be formed in a direction perpendicular to the inlet and outlet directions.

[0025] A drain channel may be formed between an upper portion of the module frame and the battery cell stack.

[0026] According to another embodiment of the present disclosure, there is provided a battery pack including the above-mentioned battery module.

[0027] Beneficial Effects

[0028] According to an embodiment of the present disclosure, in order to control high-temperature heat, gas and flame when thermal runaway occurs in a battery module, a vent portion can be formed at the upper end of the battery module so that it is adjacent to a module connector disposed on the other side of the battery module rather than a terminal bus disposed on one side of the battery module, thereby delaying the propagation of flames to adjacent battery modules.

[0029] The effects of the present disclosure are not limited to the above-mentioned effects, and further other effects not described above will be clearly understood by those skilled in the art from the description of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a diagram showing the appearance of a battery module mounted on a conventional battery pack when a fire occurs;

[0031] Figure 2 It is along Figure 1 , which is a cross-sectional view taken along line AA of , is a cross-sectional view showing the appearance of a flame affecting adjacent battery modules during a fire in a battery module mounted on a conventional battery pack.

[0032] Figure 3 is a perspective view showing a battery module according to one embodiment of the present disclosure;

[0033] Figure 4 yes Figure 3 An exploded perspective view of a battery module;

[0034] Figure 5 yes Figure 4 A three-dimensional diagram of a battery cell included in a battery module;

[0035] Figure 6 It is shown by changing the viewing angle Figure 3 The second end plate of the battery module is a three-dimensional view such that it can be seen from the front.

[0036] Figure 7 It is along Figure 3 A cross-sectional view taken along the cutting line BB;

[0037] Figure 8 is a perspective view showing a battery module according to another embodiment of the present disclosure; and

[0038] Fig. 9 is a perspective view showing a battery module according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] Hereinafter, various embodiments of the present disclosure will be described in detail 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 different ways without being limited to the embodiments set forth herein.

[0040] In order to clearly describe the present disclosure, parts irrelevant to the description will be omitted, and the same reference numerals designate the same elements throughout the specification.

[0041] In addition, in the drawings, for the convenience of description, the size and thickness of each element are arbitrarily illustrated, and the present disclosure is not necessarily limited to those illustrated in the drawings. In the drawings, for the sake of clarity, the thickness of layers, regions, etc. are exaggerated. In the drawings, for the convenience of description, the thickness of some layers and regions is exaggeratedly shown.

[0042] In addition, it will be understood that when an element such as a layer, film, region, or plate is referred to as being "on" or "above" another element, it can be directly on the other element, or there may be intervening elements. In contrast, when an element is referred to as being "directly on" another element, it means that there are no other intervening elements. In addition, the terms "on" or "above" mean being disposed above or below a reference portion, and do not necessarily mean being disposed at the upper end of the reference portion facing the opposite direction of gravity.

[0043] In addition, throughout the specification, when a portion is referred to as “comprising” a certain component, it means that the portion may further include other components without excluding the other components, unless otherwise specified.

[0044] In addition, throughout the specification, when referred to as a “plane”, this means observing the target portion from the upper side, and when referred to as a “cross section”, this means observing the target portion from one side of the cross section cut vertically.

[0045] Figure 3 is a perspective view showing a battery module according to one embodiment of the present disclosure. Figure 4 yes Figure 3 An exploded perspective view of a battery module. Figure 5 yes Figure 4 A three-dimensional view of the battery cells included in the battery module.

[0046] Reference Figures 3 to 5A battery module 100a according to one embodiment of the present invention includes a battery cell stack 120 stacked with a plurality of battery cells 110 including electrode leads 111 and 112 protruding in opposite directions, a module frame 200 for accommodating the battery cell stack 120, a first bus bar frame 310 arranged on one surface of the battery cell stack 120 in one direction (x-axis direction) in which the electrode leads 111 protrude, and a second bus bar frame 320 arranged on another surface of the battery cell stack 120 in another direction (-x-axis direction) in which the electrode leads 112 protrude.

[0047] First, refer to Figure 5 , the battery cell 110 is preferably a pouch-type battery cell. For example, the battery cell 110 according to the present embodiment has a structure in which two electrode leads 111 and 112 face each other and protrude from one end 114a and the other end 114b of the cell body 113, respectively. More specifically, the electrode leads 111 and 112 are connected to an electrode assembly (not shown) and protrude from the electrode assembly (not shown) to the outside of the battery cell 110.

[0048] On the other hand, the battery cell 110 can be manufactured by joining the two end portions 114a and 114b of the cell case 114 with one side portion 114c connecting them in a state where the electrode assembly (not shown) is accommodated in the cell case 114. In other words, the battery cell 110 according to the present embodiment has a total of three sealing portions 114sa, 114sb, and 114sc having a structure sealed by a method such as hot melting, and the remaining other side portion can be formed by the connecting portion 115. The cell case 114 can be formed of a laminated sheet including a resin layer and a metal layer.

[0049] In addition, the connection portion 115 may be extended long along one edge of the battery cell 110, and a protrusion 110p called a bat ear of the battery cell 110 may be formed at an end portion of the connection portion 115. In addition, when the battery case 114 is sealed with the protruding electrode leads 111 and 112 interposed therebetween, a platform portion 116 may be formed between the electrode leads 111 and 112 and the cell body 113. That is, the battery cell 110 includes the platform portion 116 formed to extend from the cell case 114 in the protruding direction of the electrode leads 111 and 112.

[0050] The battery cell 110 may be configured in plurality, and the plurality of battery cells 110 may be stacked so as to be electrically connected to each other, thereby forming a battery cell stack 120. Figure 4, the battery cells 110 may be stacked along the y-axis direction to form a battery cell stack 120. The first bus bar frame 310 may be located on one surface of the battery cell stack 120 in the protruding direction (x-axis direction) of the electrode lead 111. The second bus bar frame 320 may be located on another surface of the battery cell stack 120 in the protruding direction (-x-axis direction) of the electrode lead 112. The battery cell stack 120, the first bus bar frame 310, or the second bus bar frame 320 may be accommodated in the module frame 200. The module frame 200 may protect the battery cell stack 120 accommodated inside the module frame 200 and the electrical components connected thereto from external physical impacts.

[0051] The module frame 200 according to an embodiment of the present disclosure may have a single frame structure. First, the single frame may be in the form of a metal plate material integrating an upper surface, a lower surface, and two side surfaces, and may be manufactured by extrusion molding. However, the structure of the module frame 200 is not limited thereto, and may be a structure in which a U-shaped frame and an upper plate are combined. In the case of a structure in which a U-shaped frame and an upper plate are combined, it may be formed by combining the upper plate with the upper surface of the U-shaped frame, and it may be manufactured by press molding, and the U-shaped frame is a metal plate material having a combined or integrated lower surface and two side surfaces.

[0052] A thermally conductive resin may be injected between the battery cell stack 120 and the lower surface of the module frame 200 , and a thermally conductive resin layer (not shown) may be formed between the battery cell stack 120 and the lower surface of the module frame 200 by the injected thermally conductive resin.

[0053] On the other hand, the module frame 200 may be open in the protruding direction (x-axis direction, -x-axis direction) of the electrode leads 111 and 112, and the first end plate 410 and the second end plate 420 may be respectively located at two open sides of the module frame 200. The first end plate 410 may be joined to the module frame 200 while covering the first bus bar frame 310, and the second end plate 420 may be joined to the module frame 200 while covering the second bus bar frame 320. That is, the first bus bar frame 310 may be located between the first end plate 410 and the battery cell stack 120, and the second bus bar frame 320 may be located between the second end plate 420 and the battery cell stack 120. In addition, an insulating cover 800 for electrical insulation (see Figure 3 ) may be located between the first end plate 410 and the first busbar frame 310 .

[0054] The first end plate 410 and the second end plate 420 are positioned so as to cover one surface and the other surface of the battery cell stack 120, respectively. The first end plate 410 and the second end plate 420 can protect the first bus bar frame 310, the second bus bar frame 320 and various electrical components connected thereto from external impact. For this purpose, it must have a predetermined strength and may include a metal such as aluminum. In addition, the first end plate 410 and the second end plate 420 may be respectively joined to the corresponding edges of the module frame 200 by a method such as welding.

[0055] The first bus bar frame 310 is located on one surface of the battery cell stack 120 to cover the battery cell stack 120 and guide the connection between the battery cell stack 120 and the external device at the same time. Specifically, at least one of the bus bar, the terminal bus bar, and the module connector may be installed on the first bus bar frame 310. In particular, at least one of the bus bar, the terminal bus bar, and the module connector may be installed on a surface opposite to the surface of the first bus bar frame 310 facing the battery cell stack 120. In one example, Figure 4 A state in which the bus bar 510 and the terminal bus bar 520 are mounted on the first bus bar frame 310 is shown.

[0056] The battery cells 110 constituting the battery cell stack 120 may be connected in series or in parallel through the bus bar 510 or the terminal bus bar 520, and the battery cells 110 may be electrically connected to an external device or circuit through the terminal bus bar 520 exposed to the outside of the battery module 100a. In one example, the terminal bus bar 520 may be connected to an external bus bar that provides connection to other battery modules adjacent to the battery module including the terminal bus bar 520.

[0057] The first bus bar frame 310 may include an electrically insulating material and restricts the bus bar 510 or the terminal bus bar 520 from contacting the battery cell 110 except for a bonding portion of the bus bar 510 or the terminal bus bar 520 with the electrode lead 111, thereby preventing a short circuit from occurring.

[0058] On the other hand, as described above, the second bus bar frame 320 may be located on another surface of the battery cell stack 120. Bus bars and module connectors may be mounted on the second bus bar frame 320. The electrode leads 112 may be bonded to the bus bars mounted on the second bus bar frame 320. The second bus bar frame 320 may include an electrically insulating material to prevent a short circuit.

[0059] In the first end plate 410 according to the present embodiment, an opening for exposing the terminal bus bar 520 may be formed. The opening may be a terminal bus bar opening. Figure 3 and Figure 4 As shown in , a terminal bus bar opening 410H may be formed in the first end plate 410, and the terminal bus bar 520 is exposed to the terminal bus bar opening 410H. Compared with the bus bar 520, the terminal bus bar 510 also includes a portion protruding upward. This upwardly protruding portion is exposed to the outside of the battery module 100a through the terminal bus bar opening 410H. The terminal bus bar 520 exposed via the terminal bus bar opening 410H can be connected to another battery module or a battery disconnect unit (BDU) to form a high voltage (HV) connection.

[0060] Figure 6 It is shown by changing the viewing angle Figure 3 The second end plate of the battery module is a three-dimensional view such that it can be seen from the front. Figure 7 It is along Figure 3 A cross-sectional view taken along cutting line BB.

[0061] Reference Figure 6 In the second end plate 420 according to the present embodiment, an opening exposing at least one module connector may be formed. The opening may be a module connector opening. In one example, Figure 6 As shown in FIG. 4 , a module connector opening 420H exposing the module connector 600 may be formed in the second end plate 420 . This means that the module connector 600 is mounted on the second busbar frame 320 mentioned above.

[0062] In addition, although not specifically shown in the figure, the module connector 600 may be connected to a temperature sensor, a voltage measuring member, etc. provided inside the battery module 100a. The module connector 600 is connected to an external BMS (battery management system) to form a LV (low voltage) connection. The temperature sensor or the voltage measuring member performs a function of transmitting temperature information, a voltage level, etc. measured by the temperature sensor or the voltage measuring member to the external BMS.

[0063] Reference Figure 3 , Figure 6 and Figure 7, a venting portion 900 is formed on the upper plate of the module frame 200, wherein the venting portion 900 may be formed adjacent to the module connector 600 instead of the terminal bus bar 520. The venting portion 900 has a hole structure formed in the upper plate of the module frame 200. The hole structure may penetrate the upper plate of the module frame 200 obliquely in a direction close to the second bus bar frame 320. The venting portion 900 may be formed to exhaust gas in the direction where the second bus bar frame 320 or the second end plate 420 is located. This is to discharge the heat, gas, flame or spark in the direction of the second bus bar frame 320 or the second end plate 420 where the LV connection forming member (hereinafter referred to as LV member) such as the module connector 600 is located rather than in the direction of the first bus bar frame 310 or the first end plate 410 where the member (hereinafter referred to as HV member) forming the HV connection such as the terminal bus bar 520 is located.

[0064] According to this embodiment, Figure 7 As shown in , the exhaust channel 450 can be formed between the upper portion of the module frame 200 and the battery cell stack 120. The gas or heat generated between the first end plate 410 and the battery cell stack 120 is located on the second end plate 420 or the second bus bar frame 320 located on the opposite side of the first end plate 410 through the exhaust channel 450. The gas or heat moving toward the second bus bar frame 320 or the second end plate 420 can be discharged from the battery module 100a through the exhaust portion 900. HV components are more prone to overheating than LV components and are more prone to spontaneous combustion or internal fire. Therefore, if the gas or heat generated around the first end plate 410 through the exhaust channel 450 is introduced in the direction of the second end plate 420, the internal heat propagation phenomenon can be alleviated.

[0065] Reference Figure 1 and Figure 2 In the case of conventional battery modules, high temperature heat, gas, flame, etc. ejected through the opening of the battery module may affect adjacent battery modules. Specifically, adjacent battery modules facing each other for HV connection may cause damage to other electrical components including the terminal bus bar 40 or the battery cell 10.

[0066] Unlike conventional situations, in the battery module 100a according to the present embodiment, the exhaust portion 900 is formed on the upper plate of the module frame 200, and the exhaust portion 900 is formed adjacent to the module connector 600 rather than the terminal bus bar 520, thereby limiting the high temperature heat, gas, flame, etc. brought by the battery cell 110 from being discharged through the opening of the first end plate 410 (e.g., the terminal bus bar opening 410H). When the flame is transmitted to the terminal bus bar 520, the external bus bar connecting the adjacent battery module may melt and further catch fire due to an internal short circuit, which is likely to be transmitted to the adjacent battery module. However, according to the present embodiment, damage to the adjacent battery modules and the HV connection structure can be greatly reduced.

[0067] Figure 8 is a perspective view showing a battery module according to another embodiment of the present disclosure.

[0068] Reference Figure 8 , the exhaust portion 910 according to the present embodiment may be formed to exhaust in an upward direction relative to the battery cell stack 120. The exhaust portion 910 may include an inlet 911 connected to the battery cell stack 120 and formed on the upper surface of the module frame 200 in an upward direction, an exhaust port 912 formed in an upward direction and exhausting the gas flowing through the inlet 911, and a connection portion 913 connecting the inlet 911 and the exhaust port 912. The connection portion 913 may be formed in a direction perpendicular to the inlet and exhaust directions of the inlet 911 and the exhaust port 912.

[0069] The exhaust portion 910 can exhaust the high temperature heat, gas and flame inside the battery module toward the upward direction of the battery module, thereby minimizing damage to other battery modules arranged by abutting the end plates. However, since the exhaust port 912 is formed toward the upward direction, foreign matter in the air can enter the exhaust port 912 due to gravity. Therefore, the connection portion 913 can be formed in a direction perpendicular to the exhaust port 912, thereby minimizing the phenomenon that foreign matter flowing into the exhaust port 912 flows into the battery module through the inlet 911.

[0070] In addition, a foreign matter blocking portion (not shown) for blocking foreign matter entering through the discharge port 912 is formed on the connection portion 913 , thereby preventing foreign matter from entering the inlet 911 from the discharge port 912 via the connection portion 913 .

[0071] Fig. 9 is a perspective view showing a battery module according to another embodiment of the present disclosure.

[0072] Reference Fig. 9The exhaust portion 920 according to the present embodiment includes an inlet 921 formed on the upper surface of the module frame 200 to be connected to the battery cell stack and an exhaust port 922 to exhaust the gas flowing through the inlet 921, wherein the exhaust port 922 may be formed in a direction perpendicular to the inlet 921. In addition, the exhaust portion 920 includes a connection portion 923 formed between the inlet 921 and the exhaust port 922 and guiding the gas flowing into the inlet 921 in the direction where the exhaust port 922 is located, and the upper surface of the connection portion 923 may be formed obliquely.

[0073] The exhaust port 922 is formed in a direction perpendicular to the inlet 921 and the upper surface of the module frame 200, thereby preventing foreign matter floating in the air from entering the exhaust port 922 due to gravity. In addition, the upper surface of the connection portion 923 is formed obliquely toward the exhaust port 922, and the high-temperature heat, gas, and flame flowing into the inlet 921 switch directions through the connection portion 923 and are naturally discharged through the exhaust port 922.

[0074] Next, experimental results for confirming the effects of the exhaust portion 900 of the present embodiment will be described.

[0075] Table 1 compares the time required for voltage drop depending on the presence / absence and position of the vent portion 900 when a fire occurs inside the battery module.

[0076] [Table 1]

[0077]

[0078] Referring to Table 1, “Reference” is a case where the vent portion 900 is not formed in the battery module, Case 1 is a case where the vent portion 900 is formed adjacent to the LV member as in an embodiment of the present disclosure, and Case 2 is a case where the vent portion 900 is completely formed on the upper plate of the module frame 200.

[0079] In the case of "reference", the initial exhaust and flame generation time is 156 seconds, and exhaust and flame are found slightly later than in Case 1 and Case 2. However, at 186 seconds and thereafter, the voltage drop develops rapidly, and the total time required to find the voltage drop is 119 seconds. This may be because the battery module of "reference" has a sealing structure in which the exhaust portion 900 is not formed, so the oxygen supply is blocked during the internal fire, and the initial exhaust and flame generation are delayed. In addition, after exhaust and flame generation, ignition is promoted according to the inflow of external oxygen, and the voltage drop can develop rapidly.

[0080] In the case of "Case 2", the initial exhaust and flame generation time was 74 seconds, and exhaust and flame were found to be earlier than the time point in other cases. The voltage drop started from 102 seconds, and it was found that the total time required for the voltage drop was 111 seconds until 213 seconds when the voltage became 0. In the case of "Case 2", it was found that the initial voltage drop progressed very quickly compared with the other cases. This may be because sufficient oxygen was supplied through the plurality of exhaust parts 900, so that the heat propagation spread quickly.

[0081] In the case of "Case 1", the initial exhaust and flame generation time was 88 seconds, and the voltage drop progressed from 125 seconds to 360 seconds, and the total time required for the voltage drop was found to be 235 seconds. The "Case 1" table shows a longer total voltage drop time compared to the other cases, and it is also found that the time required for the gradual voltage drop is uniform and long compared to the other cases. This may be because heat propagation can be delayed by properly discharging heat and gas inside the battery module when no excess oxygen flows in through the exhaust section 900 compared to "Case 1". In addition, the exhaust section 900 of "Case 2" is arranged adjacent to the LV component, and the airflow is introduced in the direction where the LV component is located, which reduces the temperature around the HV component that may be in a relatively high temperature state.

[0082] On the other hand, in the description of Table 1, Figure 7 The reference numerals shown in the figure are added to the exhaust part, and this is only for convenience of description, and even in Figure 8 , Fig. 9 Or other exhaust parts can also show the same effect as described above.

[0083] A battery pack according to another embodiment of the present disclosure may include the above-mentioned battery module, an adjacent battery module adjacent to the battery module, and a pack housing for accommodating the battery module and the adjacent battery module. The first terminal bus bar and the second terminal bus bar included in each of the battery module and the adjacent battery module may be arranged in a direction facing each other. At this time, the first vent formed in the battery module and the second vent formed in the adjacent battery module may each have a hole structure in which they vent away from each other.

[0084] The above-mentioned battery module according to the present embodiment and the battery pack including the battery module can be applied to various devices. Such a device can be applied to vehicle devices such as electric bicycles, electric vehicles or hybrid vehicles, but the present disclosure is not limited thereto and is applicable to various devices that can use secondary batteries.

[0085] While the invention has been shown and described above with reference to preferred embodiments, the scope of the disclosure is not limited thereto, and numerous other modifications and embodiments may be devised by those skilled in the art that will fall within the spirit and scope of the inventive principles as described in the appended claims.

[0086] [Description of Reference Numerals]

[0087] 200: Module Framework

[0088] 310, 320: Busbar frame

[0089] 410, 420: End plate

[0090] 520: Terminal busbar

[0091] 600: Module connector

[0092] 900, 910, 920: Exhaust

Claims

1. A battery module, comprising: A battery cell stack in which a plurality of battery cells are stacked, a module frame accommodating the battery cell stack, a first bus bar frame received in the module frame and covering a front surface of the battery cell stack, and a second bus bar frame received in the module frame and covering a rear surface of the battery cell stack, wherein the terminal busbar is mounted to the first busbar frame, and the module connector is mounted to the second busbar frame, and The module frame is formed with vents penetrating an upper plate, and all of the vents are positioned closer to the module connector than the terminal busbars.

2. The battery module according to claim 1, wherein: The exhaust portion has a hole structure formed in the upper plate, and the hole structure penetrates the upper plate obliquely in a direction approaching the second bus bar frame.

3. The battery module according to claim 1, wherein: The terminal bus bar is connected to an external bus bar that provides connection to another battery module adjacent to the battery module including the terminal bus bar.

4. The battery module according to claim 1, wherein: The exhaust portion is formed to exhaust gas in a direction where the second bus bar frame is located.

5. The battery module according to claim 1, wherein: The exhaust section comprises: an inlet formed on an upper surface of the module frame and facing the battery cell stack, and an exhaust port for exhausting the gas flowing in through the inlet, The discharge port is formed in a direction perpendicular to the inlet.

6. The battery module according to claim 5, wherein: The exhaust section comprises: a connecting portion formed between the inlet and the outlet and guiding the gas flowing into the inlet in the direction of the outlet, and The upper surface of the connection portion is formed to be inclined.

7. The battery module according to claim 1, wherein: The vent portion is formed to vent in an upward direction relative to the battery cell stack.

8. The battery module according to claim 1, wherein: The exhaust section comprises: an inlet connected to the battery cell stack and formed in an upward direction on an upper surface of the module frame, a discharge port formed in an upward direction and discharging the gas flowing in through the inlet, and a connecting portion connecting the inlet and the outlet, The connection portion is formed in a direction perpendicular to an inflow direction of the inlet and a discharge direction of the discharge port.

9. The battery module according to claim 8, wherein: A foreign matter blocking portion for blocking foreign matter entering through the discharge port is formed on the connection portion.

10. The battery module according to claim 1, wherein: A drainage channel is formed between an upper portion of the module frame and the battery cell stack.

11. A battery pack comprising the battery module according to any one of claims 1 to 10.

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