Battery pack and automobile comprising the same

Abstract

According to an embodiment of the present application, a battery pack and a vehicle including the same are provided. The battery pack includes a battery cell assembly including a plurality of battery cells, a busbar assembly disposed at one side of the battery cell assembly, a cooling unit disposed between the plurality of battery cells, and a battery cell housing unit that divides the plurality of battery cells together with the cooling unit.

Description

Technical Field

[0001] This invention relates to battery packs and automobiles incorporating such battery packs. Background Technology

[0002] Besides portable devices, rechargeable batteries, with their high applicability and high energy density, are also widely used in electric vehicles (EVs) and hybrid electric vehicles (HEVs) powered by electric drive sources. These rechargeable batteries not only have the primary advantage of significantly reducing fossil fuel consumption, but also the advantage of producing no byproducts from energy use, thus attracting considerable attention as an environmentally friendly and energy-efficient new energy source.

[0003] Currently, widely used rechargeable batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of a single rechargeable battery cell, or a single battery cell, is approximately 2.5V to 4.5V. Therefore, when a higher output voltage is required, multiple battery cells are sometimes connected in series to form a battery pack. Furthermore, depending on the required charge / discharge capacity of the battery pack, multiple battery cells are sometimes connected in parallel to form a battery pack. Therefore, the number of battery cells included in the aforementioned battery packs can be designed in various ways according to the required output voltage or charge / discharge capacity.

[0004] On the other hand, when multiple battery cells are connected in series or parallel to form a battery pack, the usual method is to first construct a battery module including at least one battery cell, and then use such at least one battery module to add other constituent elements to form a battery pack or battery rack.

[0005] Currently, battery packs typically consist of multiple battery cells and a battery cell frame that houses these battery cells. Generally, the current battery cell frame houses these multiple battery cells and, to ensure rigidity, is configured as an assembly of multiple plates, such as a front plate, rear plate, side plate, lower plate, and upper plate.

[0006] However, current battery packs, due to the structural characteristics of the battery cell frame composed of such a multi-plate assembly, have disadvantages in terms of increased manufacturing costs, complex assembly processes, cost competitiveness, and manufacturing efficiency.

[0007] Moreover, the current battery packs, based on the structure of the battery cell frame composed of such a multi-plate assembly, increase the overall size of the battery pack, which is detrimental to energy density. Summary of the Invention

[0008] The technical problem to be solved by the invention

[0009] Therefore, the object of the present invention is to provide a battery pack that can ensure rigidity while increasing energy density, and a vehicle including the same.

[0010] Furthermore, another object of the present invention is to provide a battery pack and an automobile including the same, which can improve cost competitiveness and manufacturing efficiency.

[0011] Furthermore, another object of the present invention is to provide a battery pack capable of improving cooling performance and an automobile including the same.

[0012] means of solving technical problems

[0013] To achieve the above objectives, the present invention provides a battery pack, characterized in that it includes: a battery cell assembly comprising a plurality of battery cells; a bus assembly disposed on one side of the battery cell assembly; a cooling unit disposed between the plurality of battery cells; and a battery cell housing unit that, together with the cooling unit, divides the plurality of battery cells.

[0014] Preferably, the battery pack may include a filling component that fills the space between the cooling unit and the plurality of battery units.

[0015] Preferably, the filling component can be filled into the bus assembly in a manner that covers at least a portion of the bus assembly.

[0016] Preferably, the filling component can be filled in such a way that it completely covers the battery cell assembly and the battery cell housing unit.

[0017] Preferably, the filling component can be continuously filled between the bus assembly and the battery cell in the vertical direction of the battery cell assembly.

[0018] Preferably, the filling component can be formed of potting resin.

[0019] Preferably, the battery cell housing unit may include at least one housing member that is formed to a predetermined length along the length direction of the battery cell assembly and covers at least one side of the battery cell.

[0020] Preferably, the at least one housing component may have a shape corresponding to the outer surface of the plurality of battery cells facing it.

[0021] Preferably, multiple housing components may be provided, and the multiple housing components are arranged apart from each other by a predetermined distance along the width direction of the battery cell assembly.

[0022] Preferably, each housing component may include multiple battery cell housing sections that house the battery cells facing each other.

[0023] Preferably, the plurality of battery cell receiving portions can be recessed to a predetermined depth.

[0024] Preferably, the plurality of battery cell receiving portions may have a shape corresponding to the outer surface of the facing battery cell.

[0025] Preferably, an adhesive may be provided between the battery cell and the battery cell housing.

[0026] Preferably, the adhesive described above can be formed from a filler resin.

[0027] Preferably, the cooling unit can be disposed between the plurality of housing members in the width direction of the battery cell assembly.

[0028] Preferably, the cooling unit may include: a plurality of cooling pipes formed to a predetermined length along the length direction of the battery cell assembly, disposed between the plurality of battery cells, and having a cooling channel inside for cooling water circulation; and a cooling water inlet / outlet portion connected to the plurality of cooling pipes in a manner communicating with the cooling channel of the plurality of cooling pipes.

[0029] Preferably, the plurality of cooling pipes can be arranged between the plurality of housing components.

[0030] Preferably, the cooling channel may include: an upstream channel configured close to the busbar assembly; a downstream channel configured separately from the upstream channel; and a connecting channel connecting the upstream channel and the downstream channel.

[0031] Preferably, the connection channel can be formed on the opposite side of the cooling water inlet / outlet.

[0032] Preferably, the cooling water inlet / outlet may include a cooling water supply port connected to the upstream channel and a cooling water outlet connected to the downstream channel.

[0033] Preferably, multiple upstream channels and downstream channels can be formed.

[0034] Preferably, it may include: a battery cell support portion, which is combined with the battery cell housing unit and supports the battery cell assembly and the cooling unit.

[0035] Preferably, the battery cell support portion may be formed with a protruding specified height so as to support the support rib of the battery cell housing unit.

[0036] Preferably, multiple support ribs can be formed, and the cooling unit is arranged between the multiple support ribs.

[0037] Preferably, the support rib may be formed with an insertion groove of a predetermined depth for insertion into the bottom of the battery cell receiving unit.

[0038] Preferably, the battery cell support portion can be configured to be perpendicular to the battery cell housing unit.

[0039] Preferably, the battery cell housing unit can support the side portion of the battery cell, and the battery cell support portion supports the bottom of the battery cell.

[0040] Preferably, the battery cell support portion may be provided with a battery cell mounting portion for mounting the plurality of battery cells.

[0041] Preferably, the battery cell mounting portion can be formed as an opening of a specified size.

[0042] Preferably, the opening may have a size not exceeding the diameter of the battery cell.

[0043] Preferably, the battery cell housing units can be arranged in a honeycomb shape.

[0044] Preferably, the busbar assembly can be configured on the upper side of the battery cell assembly.

[0045] In addition, the present invention provides an automobile, characterized in that it includes at least one battery pack according to the above-described embodiments.

[0046] Furthermore, the present invention provides a battery pack, characterized in that it includes: a battery cell assembly comprising a plurality of battery cells; a battery cell housing unit and a battery cell support portion that are mutually coupled to support the plurality of battery cells; and a filling member that fills the battery cell assembly and the battery cell housing unit in a manner capable of covering the battery cell assembly and the battery cell housing unit.

[0047] Preferably, the battery cell support portion can be vertically coupled to the battery cell housing unit.

[0048] Preferably, the battery cell housing unit may have rigid reinforcement structures on its outermost two sides for reinforcing the battery cell assembly.

[0049] Preferably, the reinforcement structure can be formed as an angular protrusion-contour structure protruding outward from the battery cell housing unit.

[0050] Preferably, the reinforcement structure can be formed continuously along the length direction of the battery cell assembly.

[0051] Preferably, the above-mentioned reinforcement structure can have a triangular pyramid shape or a trapezoidal shape.

[0052] Preferably, the filling component can fill to cover the reinforced structure.

[0053] Invention Effects

[0054] According to the various embodiments described above, it is possible to provide battery packs that increase energy density while ensuring rigidity, as well as automobiles that include them.

[0055] Furthermore, according to the various embodiments described above, battery packs and automobiles including them can be provided that can improve cost competitiveness and manufacturing efficiency.

[0056] Furthermore, according to the various embodiments described above, a battery pack capable of improving cooling performance and a vehicle including the same can be provided. Attached Figure Description

[0057] The accompanying drawings, which are schematic illustrations of preferred embodiments of the invention, serve to further explain the technical concept of the invention together with the detailed description of the invention that follows. Therefore, the invention should not be interpreted as limited to the matters shown in these drawings.

[0058] Figure 1 This is a diagram illustrating a battery pack according to an embodiment of the present invention.

[0059] Figure 2 yes Figure 1 A 3D view of the battery pack disassembled.

[0060] Figure 3 It is used for explanation Figure 2 A diagram of the battery cells in the battery pack.

[0061] Figure 4 It is used for explanation Figure 3 A diagram of a battery cell assembly, according to other embodiments.

[0062] Figure 5 yes Figure 2 A 3D view of the busbar assembly of the battery pack.

[0063] Figure 6 yes Figure 5 A three-dimensional view of the connecting busbars of the busbar assembly.

[0064] Figure 7 yes Figure 2 A three-dimensional view of the cooling unit of the battery pack.

[0065] Figure 8 yes Figure 7 A cross-sectional view of the cooling unit.

[0066] Figure 9 yes Figure 2 A three-dimensional view of the battery cell housing unit of the battery pack.

[0067] Figure 10 yes Figure 2 A perspective view of the battery cell support portion of the battery pack.

[0068] Figure 11 It is used for explanation Figure 10 A diagram of the support ribs of the battery cell support portion according to other embodiments.

[0069] Figure 12 It is used for explanation Figure 1 The diagram shows the battery pack shell structure formed by filling components.

[0070] Figure 13 This is a diagram illustrating a battery cell housing unit according to another embodiment of the present invention.

[0071] Figure 14 yes Figure 13 Enlarged view of the main parts of the battery cell housing unit.

[0072] Figure 15 It is used to illustrate that by setting Figure 13 The diagram shows the battery pack housing structure formed by the filling components of the battery pack housing unit.

[0073] Figure 16 This is a diagram illustrating a car according to an embodiment of the present invention.

[0074] Marker description

[0075] 1: Car

[0076] 10: Battery Pack

[0077] 100: Battery cell assembly

[0078] 150: Battery cell; 175: Positive electrode; 170: Negative electrode

[0079] 200: Busbar assembly

[0080] 210: Main positive busbar; 220: Main negative busbar

[0081] 230: Connecting busbar

[0082] 242: Layered structure; 245: Interconnector plate connection part

[0083] 246: Positive electrode connection part; 248: Negative electrode connection part

[0084] 250: Cooling unit insertion slot

[0085] 260: Positive connector; 270: Negative connector

[0086] 300: Cooling unit

[0087] 310: Cooling pipe

[0088] 330: Cooling pipe; 312: Protrusion; 316: Recess.

[0089] 350: Cooling Channel

[0090] 352: Upstream channel; 354: Downstream channel; 356: Connecting channel

[0091] 370: Cooling water inlet / outlet

[0092] 372: Inlet / Outlet Main Body; 374: Cooling Water Supply Inlet; 376: Cooling Water Discharge Outlet

[0093] 400, 405: Battery cell housing unit

[0094] 450: Housing component; 455: Battery cell housing section

[0095] 460: Housing component; 465: Battery cell housing; 467: Guide frame

[0096] 500: Filler component

[0097] 600: Battery cell support section

[0098] 610: Battery cell mounting section; 630: Support rib

[0099] 650: Support rib; 655: Insert groove Detailed Implementation

[0100] The invention will be further clarified by referring to the accompanying drawings and detailed description of preferred embodiments. It should be understood that the illustrated embodiments are provided to aid in understanding the invention, and the invention can be implemented in various ways different from the embodiments described herein. Furthermore, to aid in understanding the invention, the drawings are not shown at actual scale, and sometimes the dimensions of some constituent elements are exaggerated.

[0101] Figure 1 This is a diagram illustrating a battery pack according to an embodiment of the present invention. Figure 2 yes Figure 1 A 3D view of the battery pack disassembled.

[0102] Reference Figure 1 as well as Figure 2The battery pack 10 can be installed as an energy source in electric vehicles or hybrid vehicles. The battery pack 10 installed in the aforementioned electric vehicles, etc., will be described in detail below with reference to the accompanying drawings.

[0103] The battery pack 10 may include a battery cell assembly 100, a bus assembly 200, a cooling unit 300, and a battery cell housing unit 400.

[0104] The aforementioned plurality of battery cells 150 are secondary batteries, which can be formed into cylindrical secondary batteries, pouch-shaped secondary batteries, or triangular secondary batteries. In this embodiment, the description will be limited to the aforementioned plurality of battery cells 150 being cylindrical secondary batteries.

[0105] Figure 3 It is used for explanation Figure 2 A diagram of the battery cells in the battery pack.

[0106] Reference Figure 3 and the above Figure 2 The aforementioned battery cells 150 can be stacked in a manner that allows them to be electrically connected to each other. Each of the aforementioned battery cells 150 may simultaneously have a positive electrode 175 and a negative electrode 170 at its upper end. Specifically, the positive electrode 175 of the battery cell 150 may be located at the center of the upper end of the battery cell 150, and the negative electrode 170 of the battery cell 150 may be located at the edge of the upper end of the battery cell 150.

[0107] In this embodiment, as described above, the positive electrode 175 and the negative electrode 170 of the plurality of battery cells 150 are both located on one side (+Z axis direction) of the plurality of battery cells 150, specifically on the upper side (+Z axis direction) of the plurality of battery cells 150, so it is easier to achieve electrical connection with the bus assembly 200 described later.

[0108] Therefore, in this embodiment, the positive electrode 175 and the negative electrode 170 of the plurality of battery cells 150 are arranged in the same direction (+Z axis direction). Compared with the structure arranged in opposite directions, i.e. two directions, the connection structure with the bus assembly 200 described later can be further simplified, and the volume occupied by such an electrical connection structure can be reduced.

[0109] Therefore, in this embodiment, the electrical connection structure between the aforementioned plurality of battery cells 150 and the bus assembly 200 described later is simplified, thereby enabling the compactness of the battery pack 10 structure and the high energy density.

[0110] The battery cell 150 described above will be further explained below.

[0111] The battery cell 150 may include an electrode assembly 160, a battery casing 170, and a top cap 175. In addition to the above-mentioned components, the battery cell 150 may further include an airtight gasket 180, a current collector 185, an insulating plate 190, and a connecting plate 195.

[0112] The electrode assembly 160 includes a first electrode plate with a first polarity, a second electrode plate with a second polarity, and a separation membrane sandwiched between the first and second electrode plates. The electrode assembly 160 can have a jelly-roll shape. That is, the electrode assembly 160 can be manufactured by rolling a laminate formed by sequentially stacking the first electrode plate, the separation membrane, and the second electrode plate at least once around a winding center C. In this case, a separation membrane can be provided on the outer peripheral surface of the electrode assembly 160 to achieve insulation from the battery casing 170. The first electrode plate is either a positive or negative electrode plate, and the second electrode plate corresponds to an electrode plate having a polarity opposite to that of the first electrode plate.

[0113] The aforementioned first electrode plate includes a first electrode current collector and a first electrode active material coated on one or both sides of the first electrode current collector. One end of the first electrode current collector in the width direction (the direction parallel to the Z-axis) has an uncoated portion without the first electrode active material. This uncoated portion functions as a first electrode tab 162. The first electrode tab 162 is located at the upper part of the electrode assembly 160 housed within the battery casing 170 in the height direction (the direction parallel to the Z-axis).

[0114] The aforementioned second electrode plate includes a second electrode current collector and a second electrode active material coated on one or both sides of the second electrode current collector. An uncoated portion, not coated with the second electrode active material, exists at the other end of the second electrode current collector in the width direction (the direction parallel to the Z-axis). This uncoated portion functions as a second electrode tab 164. The second electrode tab 164 is located at the lower part of the electrode assembly 160 housed within the battery casing 170 in the height direction (the direction parallel to the Z-axis).

[0115] The battery casing 170 is a cylindrical container with an opening at the top, and is made of a conductive metal material. The battery casing 170 houses the electrode assembly 160 through the opening at the top, and also houses the electrolyte.

[0116] The battery case 170 is electrically connected to the second electrode tab 164 of the electrode assembly 160. Therefore, the battery case 170 has the same polarity as the second electrode tab 164. In this embodiment, the battery case 170 can function as the negative electrode 170.

[0117] The battery case 170 includes a rolled edge portion 171 and a crimping portion 172 formed at its upper end. The crimping portion 172 is formed on the upper part of the electrode assembly 160. The rolled edge portion 171 is formed by pressing into the outer peripheral edge of the battery case 170. The rolled edge portion 171 prevents the electrode assembly 160, which has a size corresponding to the width of the battery case 170, from falling off through the upper opening of the battery case 170, and can serve as a support portion for placing the top cap 175.

[0118] The upper surface edge 173 of the rolled edge portion 171 of the battery casing 170 can be inserted into or contacted by the guide groove 249 of the negative terminal connection portion 248 of the bus assembly 200 (described later). This is to facilitate the welding process when performing the welding process for the electrical connection between the bus assembly 200 (described later) and the battery casing 170, which performs the function of the negative terminal 170.

[0119] The crimping portion 172 is formed on the upper part of the rolled edge portion 171. The crimping portion 172 has a shape that extends and bends in a manner that surrounds the outer peripheral surface of the cap 175 disposed on the rolled edge portion 171 and a portion of the upper surface of the cap 175.

[0120] The top cap 175 is a component made of conductive metal and covers the upper opening of the battery case 170. The top cap 175 is electrically connected to the first electrode tab 162 of the electrode assembly 160 and is electrically insulated from the battery case 170. Therefore, the top cap 175 can function as the positive electrode 175 of the battery cell 150.

[0121] The top cap 175 is mounted on the rolled edge 171 formed on the battery case 170 and is fixed by the crimping part 172. In order to ensure the airtightness of the battery case 170 and to achieve electrical insulation between the battery case 170 and the top cap 175, an airtight gasket 180 may be sandwiched between the top cap 175 and the crimping part 172 of the battery case 170.

[0122] The aforementioned cap 175 may have a protrusion extending upward from its center. This protrusion can be guided to facilitate contact with electrical connection components such as busbars.

[0123] The aforementioned current collector 185 is attached to the upper part of the electrode assembly 160. The current collector 185 is made of a conductive metal material and is connected to the first electrode tab 162. The current collector 185 may be connected to a lead 187, which may extend upwards from the electrode assembly 160 and be directly attached to the top cap 175 or to a connecting plate 195 attached to the lower surface of the top cap 175.

[0124] The aforementioned current collector 185 is attached to the end of the first electrode tab 162. The connection between the first electrode tab 162 and the current collector 185 can be achieved, for example, by laser welding. Laser welding can be performed by melting a portion of the base material of the current collector 185, or with solder placed between the current collector 185 and the first electrode tab 162. In this case, the solder can have a lower melting point than both the current collector 185 and the first electrode tab 162.

[0125] The aforementioned current collector 185 can also be attached to the lower surface of the electrode assembly 160. In this case, one side of the current collector 185 can be welded to the second electrode tab 164 of the electrode assembly 160, and the opposite side can be welded to the inner bottom surface of the battery case 170. The connection structure between the current collector 185 attached to the lower surface of the electrode assembly 160 and the second electrode tab 164 is substantially the same as that of the current collector 185 attached to the upper surface of the electrode assembly 160 described above.

[0126] The aforementioned insulating plate 190 is disposed between the upper end of the electrode assembly 160 and the rolled edge portion 171, or combined between the current collector plate 185 on the upper part of the electrode assembly 160 and the rolled edge portion 171, thereby preventing contact between the first electrode tab 162 and the battery case 170 or between the current collector plate 185 and the battery case 170.

[0127] The aforementioned insulating plate 190 has a lead hole 193 for pulling out a lead wire 187 extending upward from the current collector plate 185 or the first electrode tab 162. After being pulled upward through the lead hole 193, the lead wire 187 is attached to the lower surface of the connecting plate 195 or the lower surface of the top cap 175.

[0128] As described above, the battery cell 150 according to an embodiment of the present invention has the following structure, namely, in the length direction of the battery casing 170 (and...) Figure 2 (in the direction parallel to each other along the Z-axis), the top cap 175 on the upper side and the upper surface edge 173 of the battery case 170 respectively serve as the positive electrode 175 and the negative electrode 170. Therefore, according to an embodiment of the battery cell 150 of the present invention, when multiple cells are electrically connected, the electrical connection components such as the bus assembly 200 can be arranged only on one side of the multiple battery cells 150, thereby simplifying the structure and improving the energy density.

[0129] Figure 4 It is used for explanation Figure 3 A diagram of a battery cell assembly, according to other embodiments.

[0130] The battery unit 155 according to this embodiment is similar to the battery unit 150 of the above embodiment. Therefore, the repeated description of the configuration that is substantially the same or similar to the above embodiment is omitted. The following description focuses on the differences from the above embodiment.

[0131] Reference Figure 4 In addition to the aforementioned battery cell 150, battery cell 155 may also include a metal gasket 197 and an insulating gasket 199.

[0132] The aforementioned metal washer 197 is made of a conductive metal and is a generally disc-shaped component with a hole formed in its center. The metal washer 197 is bonded to the crimping portion 172 of the battery casing 170. The bond between the metal washer 197 and the crimping portion 172 can be achieved, for example, by laser welding.

[0133] The aforementioned metal washer 197 is electrically insulated from the top cap 175. The top cap 175 is exposed through a hole formed in the center of the metal washer 175, and the metal washer 197 is separated from the protrusion formed in the center of the top cap 175. Furthermore, the metal washer 197 and the remaining portion of the top cap 175, excluding the protrusion, are separated vertically. Therefore, the metal washer 197 is electrically connected to the second electrode tab 164 and the battery casing 170, and can function as the negative electrode of the battery cell 155.

[0134] The width D2 of the aforementioned metal washer 197 is larger than the width D1 of the upper surface of the pressing portion 172 of the battery casing 170. This is to increase the contact area between the electrical connection components and the metal washer 197 when electrical connection components such as the bus assembly 200 are joined to the metal washer 197 to connect multiple battery cells 150. Thus, with the increased contact area between the electrical connection components and the metal washer 197, the welding process can be performed smoothly, the tightness between the two components can be improved, and the resistance at the joint can be reduced.

[0135] The insulating washer 199 is sandwiched between the top cap 175 and the metal washer 197. The insulating washer 199 is made of an insulating material. In the battery cell 155 according to an embodiment of the present invention, the top cap 175 functions as the positive electrode, and the metal washer 197 functions as the negative electrode; therefore, the top cap 175 and the metal washer 197 need to maintain an electrical insulating state. Therefore, it is advantageous to use the insulating washer 199 to stably maintain such an insulating state.

[0136] The insulating washer 199 is sandwiched between the lower surface of the metal washer 197 and the top cap 175. As described above, the metal washer 197 has a width D2 that is larger than the width D1 of the upper surface of the crimping portion 172, and has a shape that extends from the crimping portion 172 toward the protrusion of the central portion of the top cap 175. Therefore, the insulating washer 199 can have a shape that extends in a manner that covers the inner surface of the hole formed in the center of the metal washer 197, so as to avoid the inner surface of the hole formed in the center of the metal washer 197 coming into contact with the protrusion of the top cap 175.

[0137] When the insulating gasket 199 is made of resin, it can be bonded to the metal gasket 197 and the top cap 175 by heat fusion. In this case, the airtightness of the bonding interface between the insulating gasket 199 and the metal gasket 197, and between the insulating gasket 199 and the top cap 175, can be enhanced.

[0138] The bus assembly 200 used for electrical connection with the aforementioned plurality of battery cells 150 will now be described in further detail.

[0139] Figure 5 yes Figure 2 A 3D view of the busbar assembly of the battery pack. Figure 6 yes Figure 5 A three-dimensional view of the connecting busbars of the busbar assembly.

[0140] Reference Figure 5 as well as Figure 6 The busbar assembly 200 is located on the upper side (+Z axis direction) of the battery unit assembly 100 and can be electrically connected to the plurality of battery units 150. The electrical connection of the busbar assembly 200 can be a parallel connection and / or a series connection.

[0141] Such a bus assembly 200 can be connected to the aforementioned plurality of battery cells 150 (see reference). Figure 2 The above positive electrode 175 (refer to) Figure 3 ) and the aforementioned negative electrode 170 (refer to Figure 3 It is electrically connected and electrically connected to external charging and discharging lines via connectors 260, 270, etc.

[0142] The composition of the busbar assembly 200 described above will be further explained in detail below.

[0143] The busbar assembly 200 may include a pair of main buses 210 and 220, a connecting bus 230, a cooling unit insertion slot 250, and a pair of connectors 260 and 270.

[0144] The aforementioned pair of main busbars 210 and 220 may have connectors 260 and 270 for charging and discharging lines that are electrically connected to the aforementioned battery cell assembly 100 and connected to the outside.

[0145] The aforementioned pair of main buses 210 and 220 can be electrically connected to the multiple battery cells 150 disposed on the outermost sides (X-axis direction) of the multiple battery cells 150 of the battery cell assembly 100. Specifically, the aforementioned pair of main buses 210 and 220 are electrically connected to the multiple battery cells 150 disposed on the outermost sides along the length direction (X-axis direction) of the battery cell assembly 100.

[0146] The aforementioned pair of main busbars 210 and 220 may include a main positive busbar 210 and a main negative busbar 220.

[0147] The aforementioned main positive busbar 210 can be configured on one side (-X-axis direction) of the busbar assembly 200, on the upper side (+Z-axis direction) of the battery cell assembly 100. This main positive busbar 210 can be electrically connected to the positive terminals 175 of multiple battery cells 150 disposed on the outermost side (-X-axis direction) of the battery cell assembly 100. This electrical connection can be performed using welding processes such as laser welding or ultrasonic welding.

[0148] The aforementioned main positive bus 210 may be equipped with a positive connector 260, which will be described later. The positive connector 260 is used to connect with the aforementioned charging and discharging line. The positive connector 260 may protrude from one side (in the -X-axis direction) of the aforementioned main positive bus 210.

[0149] On the upper side (+Z-axis direction) of the aforementioned battery cell assembly 100, the main negative electrode bus 220 can be disposed on the other side (+X-axis direction) of the aforementioned bus assembly 200. This main negative electrode bus 220 can be electrically connected to the negative electrodes 170 of a plurality of battery cells 150 disposed on the outermost side (+X-axis direction) of the aforementioned battery cell assembly 100. This electrical connection can be performed using welding processes such as laser welding or ultrasonic welding.

[0150] The aforementioned main negative busbar 220 may be equipped with a negative connector 270, which is described later. The negative connector 270 is used to connect with the aforementioned charging and discharging line. The aforementioned negative connector 270 may protrude from the other side (+X axis direction) of the aforementioned main negative busbar 220.

[0151] The aforementioned connecting bus 230 is used for electrical connection with the aforementioned plurality of battery cells 150, and multiple such bus 230s may be provided. The aforementioned plurality of connecting bus 230s may be electrically connected to the aforementioned pair of main bus 210, 220, and connected to the aforementioned positive terminal 175 and the aforementioned negative terminal 170 of the aforementioned plurality of battery cells 150.

[0152] The aforementioned plurality of connecting buses 230 can be arranged apart from each other at a predetermined distance along the length direction (X-axis direction) of the aforementioned battery cell assembly 100. Furthermore, the aforementioned plurality of connecting buses 230 can be arranged between the aforementioned main positive electrode bus 210 and the aforementioned main negative electrode bus 220 in the length direction (X-axis direction) of the aforementioned bus assembly 200.

[0153] The aforementioned multiple connecting busbars 230 may each include a layered body 242 and electrode connection portions 246 and 248.

[0154] The layered body 242 can be formed to a predetermined length along the width direction (Y-axis direction) of the battery cell assembly 100. In order to achieve electrical connection with the plurality of battery cells 150, the layered body 242 can be formed in a shape corresponding to the configuration structure of the plurality of battery cells 150 in the width direction (Y-axis direction) of the battery cell assembly 100.

[0155] The aforementioned layer 242 can be made of a conductive material. For example, as a metal, the layer 242 can be made of aluminum or copper. However, it is not limited to this, and the layer 242 can of course also be made of other materials used to achieve the aforementioned electrical connection.

[0156] The bottom of the aforementioned layered body 242 may be provided with a support layer. The support layer is provided at the bottom (-Z axis direction) of the aforementioned layered body 242 and can support the aforementioned layered body 242. The aforementioned support layer may have a shape corresponding to the aforementioned layered body 242 and can be fixed in contact with the bottom (-Z axis direction) of the aforementioned layered body 250.

[0157] The aforementioned support layer can be made of an insulating material to prevent electrical short circuits between the plurality of battery cells 150 and the layered structure 242. For example, the support layer can be made of a polyimide film. However, it is not limited to this, and the support layer can of course also be made of other insulating components made of insulating materials.

[0158] The electrode connection portions 246 and 248 protrude from the layered body 242 and can be connected to the positive electrode 175 and negative electrode 170 of the plurality of battery cells 150. Specifically, the electrode connection portions 246 and 248 may include a positive electrode connection portion 246 and a negative electrode connection portion 248.

[0159] The aforementioned positive electrode connection portion 246 is provided in multiple parts, protruding a predetermined size on one side (+X axis direction) of the aforementioned layered body 242, and can be arranged apart from each other at a predetermined distance along the length direction (Y axis direction) of the aforementioned layered body 242.

[0160] The aforementioned plurality of positive electrode connection portions 246 can be electrically connected to the positive electrode 175 of the plurality of battery cells 150 of the aforementioned battery cell assembly 100 disposed on the lower side (-Z-axis direction) of the aforementioned busbar assembly 200. The aforementioned electrical connection can be performed by welding processes such as laser welding or ultrasonic welding to achieve the electrical connection.

[0161] Multiple negative electrode connection portions 248 are provided, protruding by a predetermined size on the other side (-X-axis direction) of the layered body 242, and can be arranged apart from each other by a predetermined distance along the length direction (Y-axis direction) of the layered body 242.

[0162] The aforementioned plurality of negative electrode connection portions 248 can be electrically connected to the negative electrodes 170 of the plurality of battery cells 150 of the battery cell assembly 100 disposed on the lower side (-Z-axis direction) of the aforementioned busbar assembly 200. The aforementioned electrical connection can be performed by welding processes such as laser welding or ultrasonic welding to achieve the electrical connection.

[0163] The aforementioned cooling unit insertion slot 250 is provided on the main busbar 220, allowing one end 370 of the cooling unit 300 (described later) to pass through. Specifically, multiple cooling unit insertion slots 250 are provided on the aforementioned main negative busbar 220, allowing the cooling water inlet / outlet portion 370 of the cooling unit 300 (described later) to pass through. After passing through the aforementioned cooling unit insertion slot 250, the cooling water inlet / outlet portion 370 protrudes forward (in the +X axis direction) of the aforementioned main busbar 220, as described later in the connector 270.

[0164] The aforementioned pair of connectors 260 and 270 are used to connect to an external charging / discharging line, and can be configured as a positive connector 260 and a negative connector 270. The positive connector 260 may protrude to one side (in the -X-axis direction) of the main positive bus 210, and the negative connector 270 may protrude to the other side (in the +X-axis direction) of the main negative bus 220.

[0165] Refer again Figure 2 The cooling unit 300 is used to cool the battery cell assembly 100. It is disposed on the lower side (-Z axis direction) of the bus assembly 200 and can be disposed between the plurality of battery cells 150 along the length direction (X axis direction) of the battery cell assembly 100.

[0166] Multiple cooling units 300 as described above can be provided.

[0167] The plurality of cooling units 300 can be configured to face the plurality of battery cells 150 in the width direction (Y-axis direction) of the plurality of battery cell assemblies 100. The plurality of cooling units 300 can be configured to contact the facing battery cells 150 in order to improve cooling performance.

[0168] The cooling unit 300 described above will now be explained in further detail.

[0169] Figure 7 yes Figure 2 A 3D view of the cooling unit of the battery pack. Figure 8 yes Figure 7 A cross-sectional view of the cooling unit.

[0170] Reference Figure 7 , Figure 8 and the above Figure 2 The cooling unit 300 may include a cooling pipe 310, a cooling channel 350, and a cooling water inlet / outlet 370.

[0171] The cooling pipe 310 is formed to a predetermined length along the length direction (X-axis direction) of the battery cell assembly 100, and is disposed between the plurality of battery cells 150, and may be provided with a cooling channel 350 for cooling water circulation as described later.

[0172] The cooling pipe 310 can be formed in the width direction (Y-axis direction) of the battery cell assembly 100 to correspond to the outer surface of the plurality of battery cells 150 facing it.

[0173] The aforementioned cooling pipe 310 can be formed with a plurality of protrusions 312 and recesses 316 alternately arranged along the length direction (X-axis direction) of the battery cell assembly, wherein the plurality of protrusions 312 and recesses 316 protrude or recess along the width direction (Y-axis direction) of the battery cell assembly 100.

[0174] The cooling pipe 310 can be configured to contact the outer surface of the plurality of battery cells 150 to further improve the cooling performance of the battery cell assembly 100. The cooling pipe 310 can be attached to the plurality of battery cells 150 by means of a filling member 500 (described later) or additional adhesive members.

[0175] The cooling channel 350 allows cooling water for cooling the battery cell assembly 100 to circulate, and is provided in the cooling pipe 310 and can be connected in a manner that communicates with the cooling water inlet / outlet 370 described later.

[0176] The aforementioned cooling channel 350 may include an upstream channel 352, a downstream channel 354, and a connecting channel 356.

[0177] The aforementioned upstream channel 352 is disposed on the upper side of the aforementioned cooling pipe 310 so as to be located near the aforementioned busbar assembly 200 and can be formed to a predetermined length along the length direction (X-axis direction) of the aforementioned cooling pipe 310. Such an upstream channel 352 can be connected in a manner that communicates with the aforementioned cooling water supply port 374 of the aforementioned cooling water inlet / outlet portion 370.

[0178] The aforementioned upstream channel 352 may be formed in at least one or more forms. In this embodiment, the description will focus on the formation of multiple upstream channels 352 to ensure cooling performance.

[0179] The downstream channel 354 is disposed separately from the at least one upstream channel 352 on the lower side (-Z-axis direction) of the cooling pipe 310, and can be formed to a predetermined length along the length direction (X-axis direction) of the cooling pipe 310. Such a downstream channel 354 can be connected to the cooling water outlet 376 of the cooling water inlet / outlet portion 370.

[0180] The aforementioned downstream channel 354 may be formed in at least one or more forms. In this embodiment, the description will focus on the formation of multiple downstream channels 354 to ensure cooling performance.

[0181] The aforementioned connection channel 356 can connect at least one upstream channel and at least one downstream channel. In this embodiment, it can connect multiple upstream channels 352 and multiple downstream channels 354.

[0182] The aforementioned connecting channel 356 can be located on the opposite side of the aforementioned cooling water inlet / outlet portion 370, i.e., at the other end (+X axis direction) of the aforementioned cooling pipe 310, so as to maximize the protection of the aforementioned cooling channel 350.

[0183] In this embodiment, during the cooling water circulation in the cooling channel 350, the cooling water supplied from the cooling water supply port 374 is first supplied to the upstream channel 352 located near the busbar assembly 200, and then flows to the cooling water outlet 376 via the connecting channel 356 and the downstream channel 354.

[0184] Therefore, in this embodiment, cool water is first supplied to the area near the bus assembly 200 in the battery pack 10, which has a relatively high temperature distribution, so the cooling performance of the battery cell assembly 100 can be significantly improved.

[0185] The aforementioned cooling water inlet / outlet 370 can be connected to the cooling pipe 310 in a manner that communicates with the cooling channel 350 of the cooling pipe 310. This cooling water inlet / outlet 370 can also be connected to an external cooling line via the cooling unit insertion slot 250.

[0186] The aforementioned cooling water inlet / outlet 370 may be provided on one side (+X-axis direction) of the battery cell assembly 100 along its length (X-axis direction). The cooling pipe 310 connected to the aforementioned cooling water inlet / outlet 370 may be formed to a predetermined length along the length (X-axis direction) of the battery cell assembly 100 from the aforementioned cooling water inlet / outlet 370 toward the other side (-X-axis direction) of the battery cell assembly 100.

[0187] The aforementioned cooling water inlet / outlet section 370 may include an inlet / outlet section body 372, a cooling water supply port 374, and a cooling water outlet 376.

[0188] The aforementioned outflow / inflow main body 372 can be connected to one end (+X axis direction) of the aforementioned cooling pipe 310. The aforementioned outflow / inflow main body 372 can be provided with a connecting pipe 390 (described later) on its upper side (+Z axis direction).

[0189] The aforementioned cooling water supply port 374 is located in the aforementioned inflow / outflow main body 372 and can be connected to the aforementioned upstream channel 352. This cooling water supply port 374 can also be connected to the aforementioned external cooling line.

[0190] The aforementioned cooling water outlet 376 is located in the aforementioned inflow / outflow main body 372 and can be connected to the aforementioned downstream channel 374. The aforementioned cooling water outlet 376 is positioned at a predetermined distance from the aforementioned cooling water supply port 374 and can be connected to the aforementioned external cooling line.

[0191] Refer again Figure 2 The aforementioned battery cell housing unit 400 is a component used to ensure the rigidity of the aforementioned battery cell assembly 100, and can be arranged in a honeycomb pattern. The aforementioned battery cell housing unit 400 can be configured to surround at least a portion of the aforementioned cooling unit 300 and the aforementioned battery cell assembly 100. Such a battery cell housing unit 400 can, together with the aforementioned cooling unit 300, divide the aforementioned plurality of battery cells 150.

[0192] Figure 9 yes Figure 2 A three-dimensional view of the battery cell housing unit of the battery pack.

[0193] Reference Figure 9 and the above Figure 2The battery cell housing unit 400 may have reinforcement structures on its outermost two sides to enhance the rigidity of the battery cell assembly 100.

[0194] The aforementioned reinforcing structure can be formed as an angular, concave-convex structure protruding outwards from the battery cell housing unit. For example, the reinforcing structure can have a triangular pyramidal shape or a trapezoidal shape. That is, in this embodiment, the outermost two sides of the battery cell housing unit 400 equipped with the aforementioned reinforcing structure can be formed as protruding angular, concave-convex structures, rather than curved surfaces. Such a reinforcing structure can be continuously formed along the length direction (X-axis direction) of the battery cell assembly 100. If the outermost surface is formed as a concave curved surface, reducing the thickness of the outermost battery cell housing unit 400 is not conducive to ensuring rigidity; if it is formed as a convex curved surface, increasing the thickness of the outermost surface may make it difficult to ensure the appropriate amount of resin injection on the outermost side. In this embodiment, the aforementioned angular, concave-convex structure ensures both rigidity and the optimal amount of resin injection on the outermost side.

[0195] The aforementioned battery cell housing unit 400 may include at least one housing member 450 formed for a predetermined length along the length direction (X-axis direction) of the aforementioned battery cell assembly 100 and covering at least one side of the plurality of battery cells 150. Such at least one housing member 450 may have a shape corresponding to the outer surface of the facing plurality of battery cells 150 so as to accommodate the facing plurality of battery cells 150.

[0196] The aforementioned housing component 450 is provided in multiple ways, and the aforementioned multiple housing components 450 can be arranged apart from each other by a predetermined distance along the width direction (Y-axis direction) of the aforementioned battery cell assembly 100.

[0197] The cooling unit 300 can be arranged among the plurality of housing members 450. Specifically, the cooling unit 300 can be arranged among the plurality of housing members 450 in the width direction (Y-axis direction) of the battery cell assembly 100. More specifically, the plurality of cooling pipes 310 of the cooling unit 300 (see reference) Figure 7 It can be configured among the above-mentioned multiple housing components 450.

[0198] The aforementioned plurality of housing components 450 ensure the rigidity of the battery cell assembly 100 and the cooling unit 300, and occupy a predetermined space within the battery pack 10, thereby reducing the injection amount of the filling component 500 described later. The silicone resin filling component 500 described later has a relatively high cost; by reducing the injection amount of silicone resin through the aforementioned plurality of housing components 450, cost competitiveness can be further ensured when manufacturing the battery pack 10.

[0199] Each housing component 450 may include multiple battery cell housings 455.

[0200] The aforementioned battery cell receiving portion 455 is a component for receiving at least a portion of the facing battery cells 150. It may be provided at a position corresponding to the facing battery cells 150 when the aforementioned receiving portion 455 receives the aforementioned battery cells 150, and a corresponding number of such portions may be provided.

[0201] The aforementioned plurality of battery cell receiving portions 455 have shapes corresponding to the outer surfaces of the facing plurality of battery cells 150, and can be formed to have a predetermined depth so as to accommodate at least a portion of the outer surfaces of the facing plurality of battery cells 150. Specifically, the aforementioned plurality of battery cell receiving portions 455 can be recessed in a manner having a predetermined depth, and can have shapes corresponding to the outer surfaces of the facing plurality of battery cells 150.

[0202] An adhesive may be applied between the plurality of battery cells 150 and the plurality of battery cell receiving portions 455 to improve the fixation of the plurality of battery cells 150 when they are received by the plurality of battery cell receiving portions 455. Alternatively, the adhesive may be formed of an adhesive substance or adhesive tape having a predetermined adhesive strength, and the filler member 500 described later may also be used as the adhesive. That is, the adhesive may be composed of a filler resin.

[0203] On the other hand, the plurality of battery cell receiving portions 455 can be provided on both sides of the width direction (Y-axis direction) of the plurality of receiving portions 450 disposed between the outermost plurality of receiving portions 450. The plurality of battery cell receiving portions 455 provided on both sides of the width direction Y of each of the plurality of receiving portions 450 can be staggered from each other along the length direction (X-axis direction) of the receiving portion 450. This is to maximize the number of cylindrical battery cells 100 that can be received.

[0204] Refer again Figure 2 The filling component 500 can fill the space between the cooling unit 300 and the plurality of battery units 100 in the height direction (Z-axis direction) of the battery pack 10.

[0205] On the other hand, Figure 2 In the diagram, the filling component 500 is represented by a dotted line in the shape of a hexahedron for ease of understanding. The filling component 500 fills all the spaces between the cooling unit 300 and the plurality of battery units 100.

[0206] Such filling component 500 can prevent thermal runaway of the plurality of battery cells 100, fix the plurality of battery cells 100 more stably, improve the heat dissipation efficiency of the plurality of battery cells 150, and thus further improve the cooling performance of the plurality of battery cells 150.

[0207] The aforementioned filling component 500 can be made of filling resin. The filling resin can be formed by injecting a thin layer of resin material into the plurality of battery cells 150. The injection of the resin material can be carried out at a normal temperature of approximately 15 to 25 degrees Celsius to prevent heat loss from the plurality of battery cells 150.

[0208] Specifically, the filling component 500 can be made of silicone resin. However, it is not limited to this; in addition to silicone resin, the filling component 500 can also be made of other resin materials that can improve the fixation and heat dissipation efficiency of the plurality of battery cells 150.

[0209] More specifically, the filling component 500 covers the portions of the plurality of battery cells 100 that are not in contact with the cooling pipe 310, thereby guiding the thermal balance of the plurality of battery cells 100 and preventing cooling deviations, thus preventing localized degradation of the plurality of battery cells 100. Furthermore, by preventing localized degradation of the plurality of battery cells 100, the safety of the plurality of battery cells 100 can be significantly improved.

[0210] Furthermore, the aforementioned filling component 500 can also serve as an insulating element, that is, when an abnormal condition occurs in at least one of the plurality of battery cells 100, resulting in damage, it shields the power supply to the adjacent plurality of battery cells 100.

[0211] Furthermore, the aforementioned filling component 500 may include a material with high specific heat capacity. Therefore, the filling component 500 increases the thermal mass, and under conditions such as rapid charging and discharging of the plurality of battery cells 100, it can delay the temperature rise of the plurality of battery cells 100, preventing them from rapidly heating up.

[0212] Furthermore, the filling component 500 may include glass bubblee. The glass bubblee reduces the specific gravity of the filling component 500, thereby increasing the energy density relative to weight.

[0213] Furthermore, the filling component 500 may include a material with high heat resistance. Therefore, when a thermal event occurs in at least one of the plurality of battery cells 100 due to overheating or other reasons, the filling component 500 can effectively prevent the transfer of thermal runaway to adjacent battery cells.

[0214] Furthermore, the aforementioned filling component 500 may include a material with high flame-retardant properties. Therefore, in the event of a thermal event such as overheating in at least one of the plurality of battery cells 100, the filling component 500 can minimize the risk of fire.

[0215] In addition to the aforementioned plurality of battery cells 150, the aforementioned filling component 500 can also fill the aforementioned bus assembly 200. Specifically, the aforementioned plurality of battery cells 150 are filled within the aforementioned bus assembly 200 in such a manner that they cover at least a portion of the aforementioned bus assembly 200.

[0216] The filling component 500 can continuously fill the space between the bus assembly 200 and the plurality of battery units 100 in the vertical direction (Z-axis direction) of the battery unit assembly 100, and there is no interruption or separation space between the bus assembly 200 and the plurality of battery units 100.

[0217] The aforementioned filling component 500 can be fixed more stably than the aforementioned plurality of battery cells 150 and the aforementioned bus assembly 200. Moreover, even if a flame or the like appears on the upper side of the aforementioned plurality of battery cells 100 due to a thermal event, the aforementioned filling component 500 can effectively prevent the flame and heat from being transferred to the adjacent surrounding plurality of battery cells 100 and the aforementioned bus assembly 200.

[0218] Thus, the filling component 500 according to this embodiment is continuously filled into the plurality of battery cells 100 and the bus assembly 200 without interruption, so uniform heat dissipation without heat dissipation deviation is achieved in the region between the plurality of battery cells 100 and the bus assembly 200, thereby significantly improving the cooling performance of the battery pack 10.

[0219] Furthermore, the filling component 500 can fill to completely cover the battery cell housing unit 400 described later. The filling component 500 can continuously and uninterruptedly fill the plurality of battery cells 100, the bus assembly 200, and the battery cell housing unit 400. This further improves the cooling performance of the battery pack 10. Moreover, the filling component 500 can fill to cover the reinforcing structure of the battery cell housing unit 400.

[0220] Furthermore, the filling component 500 can fill at least a portion of the battery cell support portion 600, which will be described later. The filling component 500 can continuously and uninterruptedly fill the plurality of battery cells 100, the bus assembly 200, the cooling unit 300, and the battery cell housing unit 400. This further improves the cooling performance of the battery pack 10.

[0221] The filling component 500 can be continuously and uninterruptedly filled into the plurality of battery cells 100, the bus assembly 200, the cooling unit 300, the battery cell housing unit 400, and the battery cell support portion 600. This further improves the cooling performance of the battery pack 10.

[0222] Furthermore, the filling component 500 is filled in such a way that it can cover the space between all of the plurality of battery cells 100, so that when a thermal event occurs in a particular battery cell, thermal runaway that may be caused to the adjacent plurality of battery cells 100 can be effectively prevented.

[0223] Refer again Figure 2 The battery pack 10 may also include a battery cell support 600.

[0224] The aforementioned battery cell support portion 600 is located below the aforementioned battery cell housing unit 400 and is capable of supporting the aforementioned battery cell assembly 100 and the aforementioned cooling unit 300. This battery cell support portion 600, together with the aforementioned battery cell housing unit 400, can support the aforementioned battery cell assembly 100. Specifically, the aforementioned battery cell support portion 600 can support the bottom of the plurality of battery cells 150, and the aforementioned battery cell housing unit 400 can support the side portions of the plurality of battery cells 150.

[0225] The battery cell support portion 600 can be configured to be perpendicular to the battery cell receiving unit 400. Specifically, the battery cell support portion 600 is combined to be perpendicular to the battery cell receiving unit 400, and together with the battery cell receiving unit 400, it can ensure the rigidity of the battery pack 10.

[0226] The battery cell support portion 600 described above will now be explained in further detail.

[0227] Figure 10 yes Figure 2 A perspective view of the battery cell support portion of the battery pack. Figure 11 It is used for explanation Figure 10 A diagram of the support ribs of the battery cell support portion according to other embodiments.

[0228] Reference Figure 10The battery cell support 600 may include a battery cell mounting portion 610 and a support rib 630.

[0229] The battery unit mounting section 610 can hold or insert the aforementioned battery units 150.

[0230] Specifically, the battery cell mounting portion 610 is formed as an opening of a predetermined size, and multiple openings can be formed to correspond to the number of battery cells 150. The opening may have a size not exceeding the diameter of the battery cell 150. The battery cell mounting portion 610 guides the support of the battery cell 150, and through the opening, facilitates smoother and faster exhaust when gas is discharged through the vent provided at the bottom of the battery cell 150.

[0231] The aforementioned support rib 630 is provided on the upper surface of the battery cell support portion 600 and can protrude to a predetermined height so as to support the bottom of the battery cell housing unit 400. Such support rib 630 can be formed to a predetermined length along the length direction (X-axis direction) of the battery cell assembly 100.

[0232] Multiple support ribs 630 are provided, and cooling units 300 are arranged between the multiple support ribs 630. Specifically, cooling pipes 310 of the cooling units 300 can be arranged. Thus, the cooling pipes 310 can be placed between the multiple support ribs 630 on the upper surface of the battery unit support portion 600. The bottom surface of the cooling pipes 310 can be configured to have a height difference with the multiple support ribs 630. Therefore, even if there is movement such as shaking in the cooling pipes 310, the support ribs 630 can effectively prevent the cooling pipes 310 from detaching from the multiple support ribs 630.

[0233] The bottom of the battery cell housing unit 400 can be placed on the aforementioned plurality of support ribs 630. The upper surface of the aforementioned plurality of support ribs 630 can be coated with adhesive such as thermal adhesive to provide more stable support for the battery cell housing unit 400.

[0234] Reference Figure 11 The multiple support ribs 650 of the battery cell support portion 605 may also be provided with insertion grooves 655 of a predetermined depth for insertion into the bottom of the battery cell receiving unit 400.

[0235] The aforementioned insertion groove 655 can be formed at a predetermined depth within a plurality of support ribs 650 protruding toward the upper side (+Z axis direction) of the battery cell support portion 605, and can be sized to allow insertion into the bottom of the battery cell receiving unit 400. When the battery cell receiving unit 400 is fixed to the battery cell support portion 605, it is inserted into the insertion groove 655 of the support rib 650, thereby securing it more stably to the battery cell support portion 605.

[0236] Figure 12 It is used for explanation Figure 1 The diagram shows the battery pack shell structure formed by filling components.

[0237] Reference Figure 12 The manufacturers described above can form the battery pack casing of the battery pack 10 by injecting and coating the filling member 500 with the resin material using the resin injection device I. The filling member 500 may be the silicone resin described above.

[0238] At this time, in order to facilitate the injection and coating of the filling component 500, the battery cell assembly 100, the bus assembly 200, the cooling unit 300, the battery cell housing unit 400, and the battery cell support 600 are temporarily mounted on a mold (not shown) for guiding the injection of the filling component 400 after being assembled together. The mold may have a shape corresponding to the shape of the battery pack casing, and may have a shape that exposes components such as the positive connector 260, the negative connector 270, the cooling water inlet / outlet 370, and one end of the battery cell support 600 for connection with external devices.

[0239] Once the filling component 500 is cured within the mold, it can form a battery pack shell for forming the appearance of the battery pack 10, after which the manufacturer can remove the mold.

[0240] Therefore, in this embodiment, the battery pack housing is formed by the filling member 500 made of the filling resin, which simplifies the assembly process of the battery pack 10, significantly reduces manufacturing costs, and ensures cost competitiveness compared to the conventional method of forming a battery pack housing with a complex assembly of multiple plates.

[0241] Furthermore, in this embodiment, by forming a battery pack shell structure with the aforementioned filling component 500, the overall size of the battery pack 10 can be reduced compared to the existing battery cell frame structure composed of multiple plates. It can also significantly improve the energy density.

[0242] Figure 13 This is a diagram illustrating a battery cell housing unit according to another embodiment of the present invention. Figure 14 yes Figure 13 An enlarged view of the main parts of the battery cell housing unit.

[0243] The battery cell housing unit 405 according to this embodiment is similar to the battery cell housing unit 400 of the above embodiment. Therefore, repeated descriptions of configurations that are substantially the same or similar to those in the above embodiment are omitted. Hereinafter, the description will focus on the differences from the above embodiment.

[0244] Reference Figure 13 as well as Figure 14 The battery cell housing unit 405 described above may include a plurality of housing components 460. These plurality of housing components 460, like those in the previous embodiment, may include a plurality of battery cell housing portions 465. This has been described in detail in the battery cell housing unit 400 described above, so a repeating description is omitted below.

[0245] Guide frames 467 may be provided on the outermost two sides of the aforementioned multiple receiving components 460.

[0246] The aforementioned guide frame 467 can protrude at a predetermined height from the upper ends of both sides of the plurality of housing components 460 disposed on the outermost two sides along the longitudinal direction (X-axis direction). When the plurality of housing components 460 are assembled, the aforementioned guide frame 467 can form a predetermined edge in the longitudinal direction (X-axis direction) of the aforementioned battery unit housing unit 405.

[0247] Such a guide frame 467 can improve the injection accuracy of the filling component 500 and also improve the efficiency of the injection process in the injection process of the filling component 500 described below.

[0248] Figure 15 It is used to illustrate that by possessing Figure 13 The diagram shows the battery pack housing structure, which is formed by the filling components of the battery pack housing.

[0249] Reference Figure 15 When an operator injects and coats the filling component 500 made of the aforementioned silicone resin through a mold and a resin injection device I, the guide frame 467 can improve the injection accuracy of the filling component 500.

[0250] Specifically, the guide bracket 467 is positioned at a predetermined height along the longitudinal direction of the battery cell receiving unit 405 at the edge of the upper surface of the battery cell receiving unit 405, and may have a height higher than the upper surface of the bus assembly 200. The operator can inject the filling component 500, an amount equivalent to the height difference between the guide bracket 467 and the bus assembly 200 in the vertical direction (Z-axis direction) of the battery cell receiving unit 405. Without the guide bracket 467, the operator may find it difficult to determine the appropriate amount of filling component 500 to cover the bus assembly 200 during the injection process.

[0251] In this embodiment, when injecting the filler component 500 to cover the busbar assembly 200, it is sufficient to inject the filler component 500 to a predetermined height guided by the guide frame 467. Therefore, the injection accuracy and efficiency of the operator can be significantly improved. Furthermore, the operator can more easily confirm the time point at which the injection of the filler component 500 ends using the guide frame 467.

[0252] Therefore, the operators described above can improve injection accuracy and shorten process time when performing the injection process of the filling component 500. Furthermore, they can ensure that the injection amount of the filling component 500 is at an optimal level, reducing the manufacturing cost of the battery pack 10 and thus significantly improving cost competitiveness.

[0253] Figure 16 This is a diagram illustrating a car according to an embodiment of the present invention.

[0254] Reference Figure 16 The vehicle 1 can be configured as an electric vehicle or a hybrid vehicle, and as an energy source, it can include at least one battery pack 10 as described in the above embodiments.

[0255] In this embodiment, the battery pack 10 is configured as a compact structure with high energy density. When installed in the vehicle 1, it is easy to realize a modular structure of multiple battery packs 10, and a relatively high degree of installation freedom can be ensured in various internal space shapes of the vehicle 1.

[0256] According to the various embodiments described above, it is possible to improve the energy density while ensuring the rigidity of the battery pack 10 and the vehicle 1 including it.

[0257] Furthermore, according to the various embodiments described above, a battery pack 10 and a vehicle 1 including the battery pack 10 can be provided that can improve cost competitiveness and manufacturing efficiency.

[0258] Furthermore, according to the various embodiments described above, a battery pack 10 capable of improving cooling performance and a vehicle 1 including the same can be provided.

[0259] The preferred embodiments of the present invention have been shown and described above. However, the present invention is not limited to the specific embodiments described above. Those skilled in the art should be able to make various modifications within the spirit of the present invention as claimed in the claims, and these modifications should not be distinguished from the technical concept or prospect of the present invention.

Claims

1. A battery pack characterized by comprising: Comprising: a battery cell assembly including a plurality of battery cells; a bus bar assembly disposed on one side of the battery cell assembly; a cooling unit disposed between the plurality of battery cells; a battery cell housing unit that divides the plurality of battery cells together with the cooling unit; and a filling member that fills a space between the cooling unit and the plurality of battery cells and a space between the battery cell housing unit and the cooling unit, wherein the filling member fills the bus bar assembly in a manner capable of covering at least a portion of the bus bar assembly, and wherein the filling member continuously covers the plurality of battery cells, the bus bar assembly, and the battery cell housing unit without interruption.

2. The battery pack according to claim 1, wherein the filling member fills in a manner covering the battery cell assembly and the battery cell housing unit entirely.

3. The battery pack according to claim 1, wherein the filling member fills the bus bar assembly and the battery cells continuously in the up-and-down direction of the battery cell assembly.

4. The battery pack according to claim 1, wherein the filling member is formed of a filling resin.

5. The battery pack according to claim 1, wherein the battery cell housing unit includes at least one housing member formed in a prescribed length along the length direction of the battery cell assembly and covering at least one side surface of the battery cell.

6. The battery pack according to claim 5, wherein the at least one housing member has a shape corresponding to the outer surface of the plurality of battery cells facing each other.

7. The battery pack according to claim 5, wherein the battery cell housing unit includes a plurality of housing members, the plurality of housing members are disposed apart from each other by a prescribed distance in the width direction of the battery cell assembly.

8. The battery pack according to claim 7, wherein each housing member includes a plurality of battery cell housing portions housing the battery cells facing each other.

9. The battery pack according to claim 8, wherein the plurality of battery cell housing portions are formed in a recessed manner having a prescribed depth.

10. The battery pack according to claim 8, wherein the plurality of battery cell housing portions have a shape corresponding to the outer side surface of the battery cells facing each other.

11. The battery pack according to claim 8, wherein an adhesive is provided between the battery cells and the battery cell housing portions.

12. The battery pack according to claim 11, wherein the adhesive is formed of a filling resin.

13. The battery pack according to claim 7, wherein the cooling unit is disposed between the plurality of housing members in the width direction of the battery cell assembly.

14. The battery pack according to claim 13, wherein the cooling unit includes: a plurality of cooling pipes formed in a prescribed length along the length direction of the battery cell assembly, disposed between the plurality of battery cells, and provided with a cooling passage for circulation of cooling water inside; and A cooling water outflow-inflow portion is connected to the plurality of cooling pipes in a manner to communicate with cooling passages of the plurality of cooling pipes.

15. The battery pack according to claim 14, wherein The plurality of cooling pipes are arranged between the plurality of housing members.

16. The battery pack according to claim 14, wherein The cooling passages include: An upstream passage arranged proximate to the busbar assembly; A downstream passage arranged separately from the upstream passage; and A connecting passage connecting the upstream passage and the downstream passage.

17. The battery pack according to claim 16, wherein The connecting passage is formed on opposite sides of the cooling water outflow-inflow portion.

18. The battery pack according to claim 16, wherein The cooling water outflow-inflow portion includes: A cooling water supply port connected to the upstream passage; and A cooling water discharge port connected to the downstream passage.

19. The battery pack according to claim 16, wherein The upstream passage and the downstream passage are formed in plural.

20. The battery pack of claim 1, wherein, including: A battery cell support portion combined with the battery cell housing unit and supporting the battery cell assembly and the cooling unit.

21. The battery pack according to claim 20, wherein A support rib is formed in the battery cell support portion, the support rib protruding a prescribed height so as to be able to support the battery cell housing unit.

22. The battery pack according to claim 21, wherein The support rib is formed in plural, and the cooling unit is arranged between the plural support ribs.

23. The battery pack according to claim 21, wherein An insertion groove of a prescribed depth for insertion of a bottom portion of the battery cell housing unit is formed in the support rib.

24. The battery pack according to claim 20, wherein The battery cell support portion is arranged perpendicular to the battery cell housing unit.

25. The battery pack according to claim 20, wherein The battery cell housing unit supports a side surface portion of the battery cell, The battery cell support portion supports a bottom portion of the battery cell.

26. The battery pack according to claim 20, wherein A battery cell mounting portion for mounting the plurality of battery cells is provided in the battery cell support portion.

27. The battery pack according to claim 26, wherein The battery cell mounting portion is formed as a prescribed size opening.

28. The battery pack according to claim 27, wherein The opening has a size that does not exceed a diameter of the battery cell.

29. The battery pack according to claim 1, wherein The battery cell housing units are arranged in a honeycomb shape.

30. The battery pack according to claim 1, wherein The busbar assembly is arranged on an upper side of the battery cell assembly.

31. The battery pack according to claim 1, wherein The battery cell housing units are provided with a reinforcing structure for reinforcing rigidity of the battery cell assembly on both outermost sides.

32. The battery pack according to claim 31, wherein The reinforcement structure is formed as a corner-shaped concave-convex structure protruding outward from the cell housing unit toward the battery cell.

33. The battery pack according to claim 31, wherein The reinforcement structure is continuously formed along the length direction of the battery cell assembly.

34. The battery pack according to claim 31, wherein The reinforcement structure has a triangular pyramid shape or a trapezoidal shape.

35. The battery pack according to claim 31, wherein The filling member is filled so as to cover the reinforcement structure.

36. An automobile characterized by comprising: A battery pack including at least one battery pack according to any one of claims 1 to 35.

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