Battery pack and battery module

Abstract

The present disclosure provides a battery pack and the like capable of ensuring excellent safety when a thermal event occurs. A battery pack according to an aspect of the present disclosure may include: a plurality of battery cells each having an electrode lead; a battery cell cover configured to at least partially surround at least a portion of the plurality of battery cells; and a bus bar frame assembly configured to be electrically connected to the electrode lead and to be coupled to at least one side of the battery cell cover so as to block the flame from being discharged in a specific direction.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2022-0089575 filed on July 20, 2022, and Korean Patent Application No. 10-2023-0091932 filed on July 14, 2023, 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 pack and a car including the same, and more particularly, to a battery pack and a battery module having excellent safety against thermal events, and a car including the same. Background Art

[0004] With the development of technology and the substantial growth in demand for various mobile devices, electric vehicles, energy storage systems (ESS), etc., the interest and demand for secondary batteries as energy sources are rapidly increasing. Generally, nickel-cadmium batteries or nickel-metal hydride batteries are often used, which show almost no memory effect compared to nickel-based secondary batteries, are freely charged and discharged, and have a very low self-discharge rate and high energy density.

[0005] Such lithium secondary batteries mainly use lithium-based oxides and carbonaceous materials as cathode active materials and anode active materials, respectively. The lithium secondary battery includes: an electrode assembly in which a cathode plate and an anode plate coated with cathode active materials and anode active materials, respectively, are provided, and a separator is interposed between the cathode plate and the anode plate; and an external material (i.e., a battery case) that seals and contains the electrode assembly together with an electrolyte.

[0006] Generally, lithium secondary batteries may be classified into can type secondary batteries in which an electrode assembly is mounted in a metal can and pouch type secondary batteries in which an electrode assembly is mounted in a pouch of an aluminum laminate sheet, according to the shape of an exterior material.

[0007] In recent years, battery packs have been widely used to drive medium and large devices (such as electric vehicles and energy storage systems), or energy storage in medium and large devices. A conventional battery pack includes one or more battery modules located inside the battery pack housing and a control unit that controls the charging and discharging of the battery pack, such as a battery management system (BMS). Here, the battery module is configured to include a plurality of battery cells inside the module housing. That is, in the case of a conventional battery pack, a plurality of battery cells (secondary batteries) are housed inside the module housing to configure each battery module, and such battery modules are housed inside one or more battery pack housings to configure the battery pack.

[0008] In particular, soft pack type batteries have advantages in various aspects, such as being light in weight and requiring little dead space during stacking, but have problems of being easily affected by external impacts and poor ease of assembly. Therefore, a battery pack is generally manufactured by first modularizing a plurality of battery cells and housing them inside a battery pack case.

[0009] However, in the case of conventional battery packs, modularization may be disadvantageous in terms of energy density, ease of assembly, cooling performance, etc. In addition, conventional battery packs or battery modules may be susceptible to thermal events. In particular, if a thermal event occurs inside a battery module or battery pack, thermal runaway may occur, which leads to fire and, in the worst case, explosion. Summary of the invention

[0010] Technical issues

[0011] Therefore, the present disclosure is designed to solve the above-mentioned problems, and an object of the present disclosure is to provide a battery pack, a battery module, and the like capable of ensuring excellent safety when a thermal event occurs.

[0012] However, objects and advantages of the present disclosure are not limited to those described above, and other objects and advantages not mentioned above will be clearly understood by those skilled in the art from the following description.

[0013] Technical Solution

[0014] According to one aspect of the present disclosure, there is provided a battery pack, comprising: a plurality of battery cells, each of the plurality of battery cells having an electrode lead; a battery cell cover configured to at least partially surround at least a portion of the plurality of battery cells; and a bus bar frame assembly configured to be electrically connected to the electrode leads and to be combined with at least one side of the battery cell cover to block flames from being discharged in a specific direction.

[0015] Here, the busbar frame assembly may include: a busbar electrode, which is composed of a conductive material and is in direct contact with the electrode lead; a busbar housing, which is composed of an electrically insulating material and supports the busbar electrode; and a blocking member, which is composed of a material having a higher melting point than the busbar housing and is located on one side of the busbar housing to block flame discharge.

[0016] In addition, the blocking member may include a main body which blocks the flame from being discharged in a horizontal direction; and an extension portion which is bent from an upper end portion of the main body toward the battery cell cover.

[0017] In addition, the battery cell cover may be configured to surround both sides and upper corners of at least a portion of the battery cell.

[0018] Furthermore, the battery cell cover and the bus bar frame assembly may be configured such that the internal exhaust gas is exhausted in a downward direction.

[0019] In addition, the battery pack according to the present disclosure may further include a pack case accommodating the plurality of battery cells, the battery cell covers, and the bus bar frame assembly in an inner space thereof.

[0020] Here, the bottom of the battery pack case may be formed with a vent hole for exhausting exhaust gas inside the battery cell cover.

[0021] In addition, the battery pack according to the present disclosure may further include a control module configured to control the charge and discharge of the battery cells.

[0022] In addition, a battery module according to another aspect of the present disclosure is a battery module that accommodates at least one battery module in the internal space of a battery pack housing, wherein the battery module may include: a plurality of battery cells, each of the plurality of battery cells having an electrode lead; a battery cell cover, the battery cell cover being configured to at least partially surround at least a portion of the plurality of battery cells; a bus bar frame assembly, the bus bar frame assembly being configured to be electrically connected to the electrode lead and to be combined with at least one side of the battery cell cover to block flames from being discharged in a specific direction; and a module housing, the module housing accommodating the plurality of battery cells and the battery cell covers in its internal space.

[0023] Here, the module case is configured in a form in which at least a portion is opened, and the bus bar frame assembly may be configured to be combined with the open portion of the module case.

[0024] In addition, according to another aspect of the present disclosure, a vehicle may be provided, comprising a battery pack or a battery module according to the present disclosure.

[0025] According to one embodiment of the present disclosure, a battery pack may be provided, comprising: a plurality of battery cells stacked in one direction; a battery pack case, the battery cells being accommodated in an internal space thereof; a battery cell cover, the battery cell cover at least partially surrounding at least a portion of the plurality of battery cells in the internal space of the battery pack case; and a bus bar frame assembly disposed on at least one open side of the battery cell cover, wherein the bus bar frame assembly includes a blocking member, the blocking member blocking exhaust gas from being discharged from the battery cells.

[0026] The exhaust gas is discharged to a surface of the opening surface of the battery cell cover that is not blocked by the blocking member.

[0027] The blocking member has a bent shape, and may include: a body disposed at least one opening side of the battery cell cover; and an extending portion covering an end portion of the battery cell cover.

[0028] The battery cell cover and the extended portion of the blocking member may overlap, thereby preventing exhaust gas from being discharged through a gap between the battery cell cover and the bus bar frame assembly.

[0029] The bus bar frame assembly further includes a bus bar electrode electrically coupled to an electrode lead of the battery cell and a bus bar case supporting the bus bar electrode, and a blocking member may be mounted on an outer surface of the bus bar case.

[0030] The battery cell cover includes: a pair of first cover parts covering two facing sides of at least a portion of the battery cell; and a second cover part connected between the pair of first cover parts and covering at least a portion of the upper surface or lower surface of the battery cell.

[0031] The bus bar frame assembly is disposed on at least one of the front and rear surfaces of the battery cell, and the blocking member may include: a body disposed on at least one of the front and rear surfaces of the battery cell; and an extension covering an end of the second cover portion of the battery cell cover.

[0032] The blocking member may further include an extending portion covering an end portion of the first cover portion of the battery cell cover.

[0033] The pack case includes at least one exhaust hole for exhausting exhaust gas, and the exhaust hole may be provided on a surface side of the battery cell cover opening in an upper surface and a lower surface of the pack case.

[0034] A battery cell cover and a group of battery cells accommodated in the battery cell cover are formed in plural and mounted in an inner space of the battery pack case, and one bus bar frame assembly may be respectively disposed at least one opening side of the plurality of battery cell covers.

[0035] The blocking member may have an L-shaped cross-section when viewed from the side.

[0036] When viewed from the front, the battery cell cover may have an n-shaped cross-section or a u-shaped cross-section.

[0037] According to one embodiment of the present disclosure, a battery module can be provided, comprising: a plurality of battery cells stacked in one direction; a module housing, the battery cells being accommodated in an internal space of the module housing; a battery cell cover, the battery cell cover at least partially surrounding at least a portion of the plurality of battery cells in the internal space of the battery pack housing; and a bus bar frame assembly disposed on at least one open side of the battery cell cover, wherein the bus bar frame assembly includes a blocking member that blocks exhaust gas from being discharged from the battery cells.

[0038] Beneficial Effects

[0039] According to one aspect of the present disclosure, a plurality of battery cells may be stably accommodated inside a battery pack case or a module case without requiring a stacking frame such as a plastic box or a separate module case.

[0040] In addition, according to one aspect of the present disclosure, a soft-pack battery cell having a ductile material shell can be easily made into a solid form, thereby more easily realizing a structure in which components are directly stacked inside the battery pack shell. Therefore, the assembly ease and mechanical stability of the battery pack or battery module can be improved.

[0041] In addition, according to one aspect of the present disclosure, when thermal runaway occurs in a specific battery cell, the thermal event can be effectively handled. In particular, in the case of the present disclosure, among the three factors (fuel, oxygen, and fire source) that generate flames, the accumulation or discharge of heat corresponding to the fire source can be prevented or appropriately controlled. In addition, in the case of the present disclosure, in order to prevent heat accumulation and prevent flame discharge, exhaust discharge control, directional exhaust, fire extinguishing, etc. can be implemented.

[0042] In particular, according to one embodiment of the present disclosure, directional exhaust is performed in a downward direction, so that the safety of a user (eg, a passenger) located on an upper side can be improved.

[0043] In addition, according to one aspect of the present disclosure, even when a thermal event occurs, internal short circuits or structural collapse can be prevented. In particular, in the case of the present disclosure, when a thermal event occurs, high-pressure gas and high-temperature dust are ejected into the gap where the busbar frame assembly is located, thereby being able to more effectively prevent problems that cause various structural collapses such as the busbar frame assembly, the top plate, and the end plate.

[0044] Furthermore, according to one embodiment of the present disclosure, separation of the five-side separators blocking the upper portion and four side portions based on the battery cells can prevent heat / flame propagation between the battery cells and suppress discharge of flames, etc.

[0045] In addition, according to one aspect of the present disclosure, a module case and the like may be eliminated through a CTP concept, thereby improving cooling performance and energy density.

[0046] In addition, the present disclosure may have various other effects which will be described in each embodiment, or description of effects which can be easily inferred by those skilled in the art will be omitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings illustrate preferred embodiments of the present disclosure and together with the foregoing disclosure are used to provide a further understanding of the technical spirit of the present disclosure. However, the present disclosure is not to be construed as being limited to the accompanying drawings.

[0048] Figure 1 is a perspective view schematically showing a partial configuration of a battery pack according to an embodiment of the present disclosure.

[0049] Figure 2 It is schematically shown Figure 1 A cross-sectional view of a battery cell module assembly.

[0050] Figure 3 is a perspective view schematically illustrating a configuration of a battery cell cover included in a battery pack according to an embodiment of the present disclosure.

[0051] Figure 4 yes Figure 1 An exploded perspective view of a partial configuration of a battery pack.

[0052] Figure 5 yes Figure 4 A partial enlarged view of .

[0053] Figure 6 and Figure 7 They are Figure 4 An exploded perspective view of some of the components.

[0054] Figure 8 Show Figure 1 A front bus bar frame assembly for a battery pack.

[0055] Fig. 9 yes Figure 8 An exploded perspective view of some of the components.

[0056] Fig.10 Show Figure 1 A rear bus frame assembly for a battery pack.

[0057] Fig.11 It schematically shows another embodiment of the present disclosure. Figure 8 A perspective view of a partial configuration of an embodiment in which a blocking member is modified.

[0058] Fig.12 is a diagram schematically showing a battery pack case configuration of a battery pack according to an embodiment of the present disclosure.

[0059] Fig.13 is a bottom view of a partial configuration of a battery pack case according to an embodiment of the present disclosure.

[0060] Fig.14 is a diagram schematically illustrating directional exhaust in a battery module according to an embodiment of the present disclosure; and

[0061] Fig.15 is a diagram illustrating a lower surface of a battery module according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0062] The preferred embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be understood that the terms and words used in this specification and the appended claims should not be interpreted as having ordinary meanings and dictionary meanings, but should be interpreted as having meanings and concepts consistent with the technical concept of the present disclosure based on the principle that the inventor can appropriately define the concepts of terms and words to describe his / her own invention as well as possible. Therefore, the embodiments described in the specification and the configurations shown in the accompanying drawings are nothing more than the most exemplary embodiments of the present disclosure, and do not fully cover the spirit of the present disclosure. Therefore, it should be understood that when submitting this application, various equivalents and modifications that can replace those embodiments may exist.

[0063] In the accompanying drawings, for the convenience of description and clarity, the size of each component or a specific part of a component is enlarged, omitted or schematically shown. Therefore, the size of each element cannot fully reflect the actual size. In addition, detailed descriptions related to well-known functions or configurations will be excluded to avoid unnecessarily obscuring the subject matter of the present disclosure.

[0064] 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 can be intervening elements. Conversely, 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 arranged above or below a reference portion, and do not necessarily mean being arranged at the upper end of the reference portion in the opposite direction of gravity.

[0065] Furthermore, throughout the specification, when a part is referred to as “including” or “comprising” specific components, it means that the part may also include other components, and other components are not excluded unless otherwise specified.

[0066] Furthermore, throughout the specification, when referred to as a “plane”, this means that the target portion is viewed from the upper side at this time, and when referred to as a “section”, this means that the target portion is viewed from the section side cut vertically at this time.

[0067] Figure 1 is a perspective view schematically showing a partial configuration of a battery pack according to an embodiment of the present disclosure. Figure 2 It is schematically shown Figure 1 A cross-sectional view of a battery cell module assembly. Figure 3 is a perspective view schematically illustrating a configuration of a battery cell cover included in a battery pack according to an embodiment of the present disclosure.

[0068] Reference Figure 1The battery pack 1000 according to the present disclosure may include a battery cell module assembly 100 and a bus bar frame assembly 200. The battery cell module assembly 100 includes a plurality of battery cells 10 and a battery cell cover 110 (see Figure 2 and Figure 3 ).

[0069] For example, the battery cell 10 is a soft pack type secondary battery and may include an electrode assembly, an electrolyte, and a soft pack outer material containing them therein. A plurality of such battery cells 10 may be included in the battery pack. Such a plurality of battery cells 10 may be stacked in at least one direction. A resin layer 150 may be further provided on each of the upper and lower surfaces of the battery cell module assembly 100.

[0070] In addition, at least one side of each battery cell 10 may be provided with an electrode lead 12 (see Figure 5 For example, both sides (in the front and rear directions) of the battery cell 10 may be provided with electrode leads 12, respectively (see Figure 5 ). Therefore, a case where the bus bar frame assembly 200 is disposed on both sides (in the front direction and the rear direction) of the battery cell module assembly 100 is shown. Hereinafter, for convenience, the front bus bar frame assembly 200a and the rear bus bar frame assembly 200b are collectively referred to as reference numeral "200".

[0071] Figure 2 It is schematically shown Figure 1 A cross-sectional view of a battery cell module assembly, and showing the Figure 1 The section is taken along line AA. Figure 2 The battery cell cover 110 may be configured to at least partially surround at least a portion of the battery cells 10 among the plurality of battery cells 10. For example, the battery cell cover 110 may be configured to at least partially surround one or more battery cells 10. In one example, Figure 2 As shown, one battery cell cover 110 may be configured to surround two battery cells 10. On the other hand, each battery cell group surrounded by the battery cell cover 110 may be represented as a battery cell stack or a battery cell unit. In addition, a plurality of battery cell covers 110 may be included in one battery pack. Figure 3 etc. describe the battery cell cover 110 in detail.

[0072] In addition, the battery pack according to the present disclosure may include a heat shield 120, such as Figure 2As shown. The heat shield 120 may be configured in the form of a pad made of an insulating material and may be inserted between adjacent battery cell covers 110. In some cases, it may be accommodated in one battery cell cover 110 and may also be inserted between adjacent battery cells 10. For example, the heat shield 120 may be formed to have a thickness of 0.05t to 4t, for example, 2.0t.

[0073] In addition, the battery pack according to the present disclosure may include an insulating pad 130 at the outermost side in the stacking direction of the battery cell assembly formed by stacking the plurality of battery cell covers 110 and the plurality of battery cells 10, such as Figure 2 The insulating pad 130 may be made of a material such as GFRP, and may be formed to have a thickness of 0.05t to 1t, for example, 0.35t.

[0074] In addition, the battery pack according to the present disclosure may further include a heating pad 140, such as Figure 2 shown.

[0075] Figure 3 2 is a perspective view schematically showing a configuration of a battery cell cover included in a battery pack according to an embodiment of the present disclosure. Figure 3 , the battery cell cover 110 partially covers the outside of at least one battery cell. The battery cell cover 110 may be configured to support the battery cell 10 accommodated therein. In particular, the battery cell cover 110 may be configured to stably support the upright state of the battery cell 10 accommodated therein. To this end, the battery cell cover 110 may be configured to cover both sides and the upper or lower side of one battery cell 10 or a group of battery cells 10. For example, the battery cell cover 110 may include at least two first cover portions 111 and a second cover portion 112 (upper surface cover portions) surrounding one battery cell 10 or a group of battery cells 10 accommodated therein, such as Figure 1 , Figure 2 and Figure 3 At this point, the lower side is open.

[0076] A pair (two) of first cover portions 111 cover the two facing sides of a battery cell 10 or a group of battery cells 10 accommodated therein. The second cover portion 112 is connected between the pair of first cover portions 111, and covers the upper surface or the lower surface of a battery cell 10 or a group of battery cells 10 accommodated therein. Meanwhile, the present disclosure is not limited to those shown, and the second cover portion 112 covers the lower side of the battery cell 10, in which case the upper side may be open. Furthermore, in the present disclosure, the second cover portion 112 is not limited to covering the upper surface or the lower surface of a group of battery cells 10, and when the arrangement direction of a battery cell 10 or a group of battery cells 10 accommodated inside the battery cell cover 110 is changed, the direction of the surface covered by the second cover portion 112 may also be changed accordingly.

[0077] In addition, at least one of the front and rear surfaces of the battery cell cover 110 has an opening portion 113. The opening portion may be provided at one end portion or both ends where the electrode lead 12 of the battery cell 10 accommodated in the battery cell cover 110 is located.

[0078] In summary, the battery cell cover 110 may have a structure that is open to the front side, rear side, and lower side of a battery cell 10 or a group of battery cells 10 accommodated therein. In this case, the cross-sectional configuration of the battery cell cover 110 observed from the front side may be referred to as being substantially similar to an "n" shape. Therefore, in this case, the battery cell cover 110 may be referred to as an "n-type sheet". On the other hand, the present disclosure is not limited to those described above, and may have a structure that is open to the front side, rear side, and upper side. That is, the cross-sectional configuration of the battery cell cover 110 observed from the front side may be referred to as being substantially similar to a "u" shape.

[0079] For example, the battery cell cover 110 may be configured by bending one plate so that the two first cover portions 111 and the second cover portion 112 are integrated. Alternatively, the two first cover portions 111 and the second cover portion 112 may be manufactured separately and then manufactured in a form in which they are combined with each other. For example, the battery cell cover 110 may be combined with the bottom surface of the battery pack housing 300 using an adhesive or the like. At this time, the lower end portions of the two first cover portions 111 of the battery cell cover 110 may be combined with the bottom surface of the inside of the battery pack housing 300.

[0080] In addition, for example, the battery cell cover 110 may be made of a metal material. In particular, the battery cell cover 110 may be made of a steel material. Alternatively, the battery cell cover 110 may be made of a SUS material. In this case, even if a flame occurs in a specific battery cell 10, the melting point of the battery cell cover 110 is high, thereby being able to more effectively prevent the flame from being transmitted to the battery cell of the battery cell cover 110 adjacent to the flame, etc.

[0081] As an example, the battery cell cover 110 may be formed to have a thickness of 0.01 t to 0.4 t. Alternatively, as an example, the battery cell cover 110 may be formed to have a thickness of about 0.2 t.

[0082] In addition, in the battery cell cover 110, an insulating film (not shown) may be attached to the first cover portion 111 on two opposite sides and / or a second cover portion 112 provided on one of the upper surface and the lower surface for electrical insulation. The insulating film may be attached to at least one of the inner surface and the outer surface of the battery cell cover 110. As an example, the insulating film may be formed to have a thickness of 0.005t to 0.1t. Alternatively, as an example, the insulating film may be formed to have a thickness of approximately 0.05t. In addition, as a material for the insulating film, for example, PI (polyimide), PC (polycarbonate), etc. may be attached. The thickness and material of the insulating film are not limited to those described above, and various modifications and changes may be made according to the environment in which the present disclosure is applied.

[0083] Figure 4 yes Figure 1 An exploded perspective view of a partial configuration of a battery pack. Figure 4 1 and 2 show a case where the bus bar frame assembly 200 is respectively mounted on the front surface and the rear surface of the battery cell module assembly 100. This shows a case where the blocking member 230, which is a component of the bus bar frame assembly 200, is separated. Figure 4 In order to facilitate understanding, the figure is omitted Figure 1 The configuration includes insulating gaskets 130 disposed on both sides of the battery cell module assembly 100 and a resin layer 150 applied to the upper and lower surfaces of the battery cell module assembly 100 .

[0084] The bus bar frame assembly 200 may include a bus bar electrode 210, a bus bar housing 220, and a blocking member 230. Figures 5 to 7 The bus bar electrode 210 and the bus bar housing 220 are described. Figures 8 to 10 The blocking member 230 is described.

[0085] exist Figure 4 In the embodiment of the present invention, the bus bar frame assembly 200 may be combined with at least one open side of the battery cell cover 110. For example, the bus bar frame assembly 200 may be combined with an open front end portion and an open rear end portion of the battery cell cover 110.

[0086] In addition, the busbar frame assembly 200 can be configured to block the flame from being discharged in a specific direction. In addition, the busbar frame assembly 200 can also be configured to block the flame from being discharged in an upward direction and / or a horizontal direction. Here, the horizontal direction can be the direction where the electrode lead 12 is located, for example, the front-to-back direction.

[0087] Will refer to Figure 4 And further refer to Figures 5 to 7 The bus bar electrode 210 and the bus bar case 220 are described. Figure 5 yes Figure 4, which shows the state where the battery cell cover 110 is combined with the bus bar housing 220. Figure 6 yes Figure 4 FIG. 2 is an exploded perspective view of some components of FIG. 2 , which shows the bus bar electrode 210 and the bus bar housing 220 . Figure 7 yes Figure 4 1 is an exploded perspective view of some components of the battery cell cover 110 , the bus bar electrode 210 , and the bus bar housing 220 .

[0088] The busbar electrode 210 may be made of a conductive metal and may be configured to directly contact the electrode lead 12. The electrode lead 12 may pass through the lead slit 221 of the busbar housing 220 and engage with the busbar electrode 210 outside the busbar housing 220. The busbar electrode 210 may be made of a material such as copper or aluminum. In particular, the busbar electrode 210 may be configured to maintain a contact state with the electrode lead 12 by welding or the like. The busbar electrode 210 of the busbar frame assembly 200 may be electrically connected to the electrode lead 12 to be electrically connected in series and / or in parallel with a plurality of battery cells 10. In addition, the busbar frame assembly 200 may be configured to be connected to a control module such as a battery management system (BMS) through the busbar electrode 210 and transmit sensing information such as voltage. As Figure 1 and Figure 8 As shown, the bus bar electrode 210 may include a terminal bus bar 211 .

[0089] The bus bar housing 220 may be made of an electrically insulating material such as plastic, and may be configured to support the bus bar electrode 210. In particular, referring to Figure 5 and Figure 6 The bus bar housing 220 may be formed with a lead slit 221 or the like so that the electrode lead 12 may pass therethrough. The electrode lead 12 penetrates the lead slit 221 of the bus bar housing 220 and is joined to the bus bar electrode 210 .

[0090] In addition, the bus bar housing 220 may be further provided with a battery cell cover slit 222 so that the combination with the battery cell cover 110 can be maintained in an airtight manner. Figure 3 The protrusion 110 a of the open end of the battery cell cover 110 may be fitted into the battery cell cover slit 222 of the bus bar housing 220 .

[0091] The number of busbar electrodes 210 and the number of lead slits 221 of the busbar housing 220 are not limited to those shown in the present disclosure, and may be modified and applied in various ways depending on the number of battery cells 10, the number of battery cell covers 110, the method of joining the electrode leads 12 to the busbar electrodes 210, etc. In addition, the number and arrangement of the battery cell cover slits 222 of the busbar housing 220 are not limited to those shown in the present disclosure, and may be modified and changed in various ways depending on the number of battery cells 10, the number of battery cell covers 110, the arrangement of the protrusions 110a of the battery cell covers 110, etc. The arrangement of the protrusions 110a of each battery cell cover 110 in the plurality of battery cell covers 110 is not limited to Figure 7 Those arrangements shown in the drawings and may be modified and applied in various ways according to the embodiments of the present disclosure.

[0092] Will refer to Figure 4 And further refer to Figures 8 to 10 The blocking member 230 is described. Figure 8 A front bus bar frame assembly 200 a including a blocking member 230 is shown. Fig. 9 yes Figure 8 An exploded perspective view of some of the components. Fig.10 The bus bar frame assembly 200 b including the blocking member 230 is shown.

[0093] First, the blocking member 230 may be made of a material having a higher melting point than the bus bar housing 220. For example, the blocking member 230 may be made of a metal material, in particular, a steel material such as SUS. In addition, for example, the blocking member 230 may have a thickness of 0.05t to 0.5t, for example, 0.3t, as an appropriate thickness in consideration of manufacturability and ease of assembly. In this case, even if there is high-temperature exhaust gas or flame, the blocking member 230 will not melt or collapse, and can stably maintain its shape.

[0094] In addition, refer to Figure 4 , the blocking member 230 may be located on one surface of the bus bar housing 220. In particular, the blocking member 230 may be attached to the outer side of the bus bar housing 220. In addition, the blocking member 230 may be configured to block the flame from being discharged. In particular, the blocking member 230 may prevent the exhaust gas discharged from the inside of the battery cell cover 110 from flowing in a horizontal direction such as a front-rear direction or an upward direction.

[0095] Reference Figures 8 to 10The blocking member 230 has a bent shape and includes a main body 231 and an extension 232. When viewed from the side, the cross section of the blocking member 230 can be said to be formed in an L shape. The main body 231 and the extension 232 can be integrally formed, or can be manufactured separately and then manufactured in a form in which they are combined with each other.

[0096] The main body 231 blocks the exhaust (flame) from being discharged mainly in the horizontal direction. The extension 232 blocks the exhaust (flame) from being discharged mainly in the vertical direction ( Figure 4 The gas is discharged in the upward direction.

[0097] The body 231 is attached to the outer surface of the bus bar case 220. The extension part 232 is configured in the form of being bent toward the battery cell cover 110 at the upper end or lower end of the body 231. The extension part 232 is bent toward the battery cell cover 110 at the upper end of the body 231.

[0098] The extension 232 is disposed on the upper side of the front and rear ends of the battery cell cover 110 and may be located on the battery cell cover 110. Therefore, the front and rear ends of the upper surface of the battery cell 10 may be covered by the battery cell cover 110 and the extension 232 in an overlapping manner.

[0099] In addition, the blocking member 230 is provided at the end of the battery cell cover 110, and is combined with the battery cell cover 110. Thereby, the front opening portion and the rear opening portion of the battery cell cover 110 are sealed.

[0100] The bus bar housing 220 is combined with the front opening and the rear opening of the battery cell cover 110 (see Figure 5 Without providing the blocking member 230 , exhaust gas may leak through the slits 221 and 222 of the bus bar case 220 or gaps between the front and rear coupling portions of the bus bar case 220 and the battery cell cover 110 .

[0101] However, according to the present disclosure, the outer surface of the bus bar housing 220 and the end of the battery cell cover 110 are covered with the blocking member 230 so that the battery cell cover 110 overlaps with the extension 232 of the blocking member 230, which can prevent the exhaust gas from being discharged into the gap between the battery cell cover 110 and the bus bar frame assembly 200. In addition, such exhaust gas can be prevented from being discharged in an unintended direction ( Figure 4 Thus, as will be referred to later Fig.12 As described, directional exhaust can be achieved.

[0102] Meanwhile, in the blocking member 230, the main body 231 and the extension 232 may be integrally formed by bending one plate. For example, a portion of one SUS plate may be bent, and the main body 231 and the extension 232 may be separated based on the bent portion. Alternatively, the main body 231 and the extension 232 may be integrally formed.

[0103] In addition, more than one blocking member 230 may be included in one bus bar frame assembly 200. For example, a plurality of unit blocking members 230 may be arranged side by side in the left-right direction from the outside of the bus bar housing 220. Alternatively, one blocking member 230 may be configured to cover the entire surface of the outside of the bus bar housing 220.

[0104] The blocking member 230 includes a coupling hole 231a in the body 231. Figure 4 and Figure 5 As described in the above, the electrode lead 12 is joined to the bus bar electrode 210 on the outer surface of the bus bar housing 220, and then Fig. 9 The blocking member 230 is installed on the outer surface of the bus bar housing 220 so that the bus bar electrode 210, the bus bar housing 220 and the blocking member 230 can be combined together through the combining hole 231a. At this time, the bus bar electrode 210, the bus bar housing 220 and the blocking member 230 can be combined by bolting, etc., but the present disclosure is not limited thereto, and they can be combined by various methods.

[0105] In addition, the blocking member 230 may further include a terminal bus bar penetration portion 232a in the extension portion 232, and the terminal bus bar 211 may penetrate the terminal bus bar penetration portion 232a. Even if the blocking member 230 covers the outer surface of the bus bar housing 220, the terminal bus bar 211 protrudes to the outside of the blocking member 230. Therefore, the battery cell module assembly 100 can be electrically connected to a BMS or the like through the terminal bus bar 211 protruding to the outside of the blocking member 230. The terminal bus bar penetration portion 232a may be formed by a total of two electrodes (cathode and anode).

[0106] The shape, structure, and arrangement of the terminal bus bar penetration portion 232a through which the terminal bus bar 211 can penetrate are not limited to those shown in the present disclosure, and various modifications and changes may be made. Figure 8 As shown, the front bus bar frame assembly 200a may be provided with a terminal bus bar penetration portion 232a, but in some cases, it may be provided in the rear bus bar frame assembly 200b. In addition, in some cases, various modifications and changes may be made, such as providing one in each of the front bus bar frame assembly 200a and the rear bus bar frame assembly 200b.

[0107] In addition, the blocking member 230 may further include a sealing member 233 located at the end of the extension portion 232. The exhaust gas may be prevented from leaking through the gap between the end of the extension portion 232 and the battery cell cover 110. The sealing member 233 is provided as a pair, for example, Fig. 9 As shown, the sealing member 233 may be respectively disposed at the upper and lower ends of the extension portion 232 of the blocking member 230. However, various modifications and changes may be made, for example, only one sealing member 233 may be disposed at either the upper or lower end of the extension portion 232.

[0108] In addition, for example, the blocking member 230 may be composed of a plurality of sub-blocking members 2301, 2302, ..., 230 n A plurality of sub-blocking members 2301, 2302, ..., 230 n A gap is formed between each of the battery cells so that the protrusion 110a of the battery cell cover 110 can be combined. Figure 8 The number of sub-blocking members of the front bus bar frame assembly 200a is Fig.10 The number of sub-blocking members of the rear bus bar frame assembly 200b in the embodiment is shown to be different, but the present disclosure is not limited to those shown, and various modifications and changes can be made. That is, various modifications and changes can be made according to the shape of the front and rear protrusions 110a of the battery cell cover 110 constituting the battery cell module assembly 100 and the shape of the front and rear bus bar housings 220 of the bus bar frame assembly 200.

[0109] In addition, the present disclosure does not necessarily have to consist of a plurality of sub-blocking members (2301, 2302, ..., 230 n ) but various modifications and changes may be made, for example, one blocking member 230 is integrally formed so as to cover even the protrusion 110 a of the battery cell cover 110 .

[0110] Fig.10 Shown at Figure 1 The busbar frame assembly 200b on the rear side of the battery pack, and the description of each component is the same as Figure 8 The description of the respective components of the front bus bar frame assembly 200 a of the battery pack in FIG. 1 is repeated, and therefore, reference is made to the above description.

[0111] Fig.11 It schematically shows another embodiment of the present disclosure. Figure 8 A perspective view of a partial configuration of an embodiment in which a blocking member is modified. Fig.12The blocking member 230 further includes an extension portion 234 bent toward the battery cell cover 110 at both ends of the main body 231. The extension portion 234 may be located on both sides of the front end portion and the rear end portion of the battery cell cover 110. In this case, the front end portion and the rear end portion of both sides of the battery cell 10 may be covered by the battery cell cover 110 and the extension portion 234 in an overlapping manner. The extension portion 233 may be provided as a pair.

[0112] The battery cell cover 110 overlaps the extending portions 232 and 234 of the blocking member 230 , so that exhaust gas can be prevented from being discharged through a gap between the battery cell cover 110 and the bus bar frame assembly 200 .

[0113] for Fig.11 For further description of the blocking member 230, refer to the above reference Figures 1 to 10 The description of the extension 232 is described. In addition, Fig.10 The rear bus bar frame assembly 200 b may further include extensions 234 bent toward the battery cell cover 110 at both ends of the main body 231 in the same manner, and various changes and modifications may be made.

[0114] Next, refer to Fig.12 and Fig.13 , the directional exhaust of the battery pack of the present disclosure will be described.

[0115] The exhaust gas is discharged to the surface of the opening surface of the battery cell cover 110 that is not blocked by the blocking member 230. For example, the battery cell cover 110 and the busbar frame assembly 200 can be configured to discharge the exhaust gas inside the battery pack in a downward direction. For example, the battery cell cover 110 can be in the form of an n-shaped sheet, and can be configured so that the top side, left side and right side of the battery cell 10 contained inside are sealed, and the front side, rear side and bottom side are open. At this time, the front side and rear side of the battery cell cover 110 can be covered or sealed by the busbar frame assembly 200. Therefore, the internal accommodation space formed by the battery cell cover 110 and the busbar frame assembly 200 can only be opened in the downward direction. Therefore, when exhaust gas or flame appears from the battery cell 10 contained in the internal space, gas, flame, etc. can only be discharged in the downward direction. In this case, a directional exhaust structure in which exhaust gas, etc. is discharged in the downward direction can be realized. In particular, when exhaust gas is discharged, sparks such as active material particles may be included. According to the implementation configuration, the exhaust path is formed to be curved so that active material particles or flames can be suppressed from being discharged to the outside.

[0116] In addition, the battery pack according to the present disclosure may further include a battery pack housing 300 having an internal space, such as Fig.12Here, the battery cell module assembly 100 including a plurality of battery cells 10 and a battery cell cover 110, the bus bar frame assembly 200, etc. may be accommodated in the internal space of the battery pack housing 300. In addition, for example, the battery pack housing 300 may include a lower housing 310 and an upper housing 320, but the present disclosure is not limited thereto and may be implemented by various modifications and changes as long as it has a form in which the battery cell module assembly 100 may be accommodated.

[0117] In particular, if Fig.12 and Fig.13 As shown, the battery pack case 300 may have at least one exhaust hole 330 formed at the bottom for exhausting exhaust gas inside the battery cell cover 110 . Fig.13 yes Fig.12 FIG. 1 is an enlarged view of a portion (dashed line) of a battery pack housing 300 where the exhaust hole 330 is provided. Here, the exhaust hole 330 of the battery pack housing 300 may be configured to communicate with the internal space of the battery cell cover 110. That is, the battery cell module assembly 100 including the battery cell cover 110 and a plurality of battery cells 10 is placed at the bottom of the battery pack housing 300, wherein the exhaust gas discharged from the battery cell 10 is blocked from being discharged upward and horizontally by the battery cell cover 110 and the bus bar frame assembly 200, and as indicated by the arrow, the exhaust gas can only be discharged in a downward direction through the exhaust hole 330 of the battery pack housing 300. In such an implementation configuration, a direct exhaust structure in a downward direction may be realized by the battery cell cover 110, the bus bar frame assembly 200, and the battery pack housing 300.

[0118] In addition, the battery pack according to the present disclosure may further include a control module (not shown) configured to control the charge and discharge of the battery cell 10. The control module may include a battery management system (BMS) and may be stored inside the battery pack case 300 together with the battery cell 10 and the battery cell cover 110.

[0119] At the same time, more than one battery module can be stored in a battery pack. Fig.14 and Fig.15 At this time, the configurations described in the above various embodiments, especially the battery cell module assembly 100 including the battery cell 10 and the battery cell cover 110 and the bus bar frame assembly 200 can be applied to the battery module, and therefore, the description of the repeated contents will be omitted, and please refer to the above reference. Figures 1 to 13 The content of the description.

[0120] Fig.14 is a diagram schematically illustrating directional exhaust in a battery module according to an embodiment of the present disclosure. Fig.15 is a diagram illustrating a lower surface of a battery module according to an embodiment of the present disclosure.

[0121] A battery module according to another aspect of the present disclosure is at least one battery module accommodated in the internal space of a battery pack housing 300, wherein the battery module may include: a plurality of battery cells 10 each having an electrode lead 12; a battery cell cover 110 arranged to at least partially surround at least some of the plurality of battery cells 10; a bus bar frame assembly 200 configured to be electrically connected to the electrode lead 12 and combined with at least one side of the battery cell cover 110 as at least one side of the battery cell module assembly 10 (for example, one side or two opposite sides provided with the electrode lead 12) to block the discharge of flames in a specific direction; and a module housing 400 accommodating the plurality of battery cells 10 and the battery cell cover 110 in its internal space.

[0122] The module housing 400 may be configured in a form in which at least a portion is open, and the bus bar frame assembly 200 may be combined with the open portion of the module housing 400. For example, the module housing 400 may be configured in a form of a single frame having upper, lower, left, and right sides closed and front and rear sides open based on the internal space. In this case, the bus bar frame assembly 200 may be combined with the front and rear openings of the module housing 400.

[0123] In addition, if Fig.15 As shown, the module housing 400 may have at least one exhaust hole 410 formed at the bottom for exhausting the exhaust gas inside the battery cell cover 110. In addition, the exhaust hole 410 of the module housing 400 may be configured to communicate with the accommodation space of the battery cell cover 110 accommodated inside the module housing 400. In such an implementation configuration, when exhaust gas is generated from the battery cell 10 accommodated inside the battery cell cover 110, the generated exhaust gas may be exhausted to the bottom instead of being exhausted to the top or the front and rear sides, as shown in FIG. Fig.15 shown.

[0124] In addition, in the case where a battery cell module assembly 100 (including a plurality of battery cells 10 and a battery cell cover 110 ) and a bus bar frame assembly 200 are included in a battery module, the foregoing description of the battery pack may be applied in the same or similar manner, and thus, a detailed description thereof will be omitted.

[0125] On the other hand, according to yet another aspect of the present disclosure, a vehicle including the battery pack or the battery module according to the present disclosure may be provided.

[0126] The present disclosure has been described in detail with reference to the non-limiting embodiments and the accompanying drawings. However, it will be understood that the detailed description and specific examples, while representing preferred embodiments of the present disclosure, are given by way of illustration only, as various changes and modifications within the spirit and scope of the present disclosure will become apparent to those skilled in the art from the detailed description.

[0127] [Explanation of Reference Numerals]

[0128] 10: Battery Cell

[0129] 12: Electrode lead

[0130] 100: Battery cell module assembly

[0131] 110: Battery cell cover

[0132] 111: First cover

[0133] 112: Second cover

[0134] 113: Opening

[0135] 120: Heat insulation board

[0136] 130: Insulation pad

[0137] 140: Heating pad

[0138] 150: Resin layer

[0139] 200: Busbar frame assembly

[0140] 210: Busbar electrode

[0141] 220: Busbar housing

[0142] 230: Blocking member

[0143] 231: Main body

[0144] 232: Extension

[0145] 233: Sealing member

[0146] 234: Extension

[0147] 300: Battery pack housing

[0148] 310: Lower housing

[0149] 320: Upper shell

[0150] 330: Exhaust hole

[0151] 400: Module housing

[0152] 410: Exhaust hole

Claims

1. A battery pack comprising: A plurality of battery cells, the plurality of battery cells being stacked in one direction; A battery pack housing, wherein the battery cells are accommodated in an internal space of the battery pack housing; a battery cell cover at least partially surrounding at least a portion of the plurality of battery cells in the interior space of the battery pack housing; as well as a bus bar frame assembly disposed on at least one opening side of the battery cell cover, The busbar frame assembly includes a blocking member that blocks exhaust gas from being discharged from the battery cells.

2. The battery pack according to claim 1, wherein: The exhaust gas is discharged to a surface of the opening surface of the battery cell cover that is not blocked by the blocking member.

3. The battery pack according to claim 1, wherein: The blocking member has a bent shape and includes a main body disposed at the at least one opening side of the battery cell cover and an extending portion covering an end portion of the battery cell cover.

4. The battery pack according to claim 3, wherein: The battery cell cover overlaps the extending portion of the blocking member, thereby preventing exhaust gas from being discharged through a gap between the battery cell cover and the bus bar frame assembly.

5. The battery pack according to claim 1, wherein: The bus bar frame assembly further includes a bus bar electrode and a bus bar housing, the bus bar electrode being electrically coupled to the electrode lead of the battery cell, the bus bar housing supporting the bus bar electrode, and The blocking member is mounted on an outer surface of the bus bar housing.

6. The battery pack according to claim 1, wherein: The battery cell cover includes a pair of first cover parts covering at least a portion of two facing sides of the battery cell and a second cover part connected between the pair of first cover parts and covering at least a portion of an upper surface or a lower surface of the battery cell.

7. The battery pack according to claim 6, wherein: The bus bar frame assembly is disposed on at least one of the front surface and the rear surface of the battery cell, and The blocking member includes a main body disposed on at least one of the front surface and the rear surface of the battery cell and an extending portion covering an end portion of the second cover portion of the battery cell cover.

8. The battery pack according to claim 7, wherein: The blocking member further includes an extending portion covering an end portion of the first cover portion of the battery cell cover.

9. The battery pack according to claim 5, wherein: The battery pack housing includes at least one exhaust hole for exhausting the exhaust gas, and The exhaust hole is provided on a surface side of the battery cell cover opening among the upper surface and the lower surface of the battery pack case.

10. The battery pack according to claim 1, wherein: The battery cell cover and the battery cell group accommodated in the battery cell cover are formed in plurality and installed in the inner space of the battery pack case, and A busbar frame assembly is respectively disposed on at least one opening side of the plurality of battery cell covers.

11. The battery pack according to claim 1, wherein: When viewed from the side, the blocking member has an L-shaped cross-section.

12. The battery pack according to claim 1, wherein: The battery cell cover has an n-shaped cross section or a u-shaped cross section when viewed from the front.

13. A battery module, comprising: A plurality of battery cells, the plurality of battery cells being stacked in one direction; A module housing, wherein the battery cell is accommodated in an internal space of the module housing; a battery cell cover at least partially surrounding at least a portion of the plurality of battery cells in the interior space of the battery pack housing; as well as a bus bar frame assembly disposed on at least one opening side of the battery cell cover, The busbar frame assembly includes a blocking member that blocks exhaust gas from being discharged from the battery cells.

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