Battery pack with improved cooling performance

Abstract

A battery pack according to one embodiment of the present invention includes: one or more battery modules; a housing for accommodating the battery modules; and an upper heat sink disposed above the battery modules on the upper part of the housing. The battery pack according to one embodiment of the present invention has the following effects: if the battery modules within the battery pack experience excessive temperature rise or fire, it delays the rate of heat transfer, controls the temperature of the battery pack leads, and prevents structural collapse of the upper part of the battery pack.

Description

Technical Field

[0001] The present invention relates to a battery pack with improved cooling performance, and more specifically, to a battery pack that cools not only the lower part of the battery pack but also the upper part of the battery pack. Background Technology

[0002] Secondary batteries are rechargeable and dischargeable batteries, unlike non-rechargeable primary batteries, and are used not only in portable devices but also in electric vehicles (EVs), hybrid electric vehicles (HEVs), and other vehicles powered by electric drive sources.

[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 these individual rechargeable battery cells (i.e., individual battery cells) is approximately 2.5V to 4.6V. Therefore, when a higher output voltage is required, multiple battery cells are connected in series to form a battery pack. Furthermore, multiple battery cells can be connected in parallel to configure the battery pack according to the required charge / discharge capacity. Therefore, the number of battery cells included in a battery pack can be set differently depending on the required output voltage or charge / discharge capacity.

[0004] When a battery pack is constructed by connecting multiple battery cells in series or parallel, it is usually first constructed as a battery module including at least one battery cell (preferably multiple battery cells), and then a battery pack is constructed by adding other components while using at least one battery module. Here, a battery module refers to a component in which multiple battery cells are connected in series or parallel, and a battery pack refers to a component in which multiple battery modules are connected in series or parallel to increase capacity, output, etc.

[0005] like Figure 1 As shown, the battery pack 10 typically has a structure in which multiple battery modules 1 are housed within a battery pack housing 11. To maintain structural stability, the multiple battery modules 1 or battery module assemblies can be generally arranged on the same plane.

[0006] However, in such a battery pack 10, when overcharging or other events occur, the temperature of the battery module 1 may rise excessively, and an explosion or fire may occur due to expansion. Such an explosion or fire could pose a greater danger and potentially cause injury to people.

[0007] Therefore, as Figure 2 As shown, when excessive temperature rise or fire occurs in some battery modules 1 within the battery pack 10, it is necessary to delay thermal runaway and control the maximum temperature of the housing (especially the cover) of the battery pack 10. Summary of the Invention

[0008] Technical issues

[0009] This disclosure aims to provide a battery pack that can delay heat spread, control the temperature of the battery pack cover, and prevent the upper structure of the battery pack from collapsing in the event of excessive temperature rise or fire in the battery modules within the battery pack.

[0010] Technical solution

[0011] The battery pack according to this disclosure includes one or more battery modules, a housing configured to house the battery modules, and an upper heat sink disposed above the battery modules at the upper part of the housing.

[0012] In addition, the upper radiator includes cooling channels through which coolant flows.

[0013] In addition, the battery pack also includes a flame cover plate located on the upper part of the battery module and arranged below the upper heat sink.

[0014] In addition, the flame covering sheet includes mica.

[0015] In addition, the housing includes a cover disposed at the top.

[0016] In addition, the cover is positioned above the battery module.

[0017] In addition, the upper heat sink is arranged on the upper side of the cover.

[0018] In addition, the battery pack includes a flame cover plate disposed above the battery module, and the flame cover plate is disposed on the underside of the cover.

[0019] In addition, the flame cover is attached to the lower surface of the cover.

[0020] In addition, the flame cover is attached to the cover by an adhesive.

[0021] In addition, the upper heat sink is connected to the cover.

[0022] In addition, the upper radiator is connected to the cover by fastening components.

[0023] In addition, the fastening component may be a bolt.

[0024] Furthermore, the upper radiator is attached to the cover by a resin disposed between the upper radiator and the cover.

[0025] In addition, the upper radiator is attached to the cover by a pad disposed between the upper radiator and the cover.

[0026] In addition, the battery pack also includes a lower heat sink, which is disposed at the lower part of the housing and includes cooling channels through which coolant flows.

[0027] In addition, the battery pack includes a fixing member for securing the upper radiator to the battery pack, and the fixing member is secured to the vehicle on which the battery pack is installed.

[0028] In addition, the fixing member includes: an upper member disposed on the upper side of the upper radiator; and a connecting member extending from one end of the upper member and fastened at one end to the vehicle.

[0029] Beneficial effects

[0030] A battery pack with improved cooling performance according to an exemplary embodiment of the present disclosure has the following effects: delaying heat transfer, controlling the temperature of the battery pack cover, and preventing structural collapse of the upper part of the battery pack when excessive temperature rise or fire occurs in the battery modules within the battery pack. Attached Figure Description

[0031] Figure 1 A battery pack based on existing technology is shown.

[0032] Figure 2 It shows Figure 1 The fires are shown in some of the battery modules.

[0033] Figure 3 A battery pack according to an exemplary embodiment of the present disclosure is shown.

[0034] Figure 4 This is a perspective view of a battery module according to an exemplary embodiment of this disclosure.

[0035] Figure 5 This is an exploded perspective view of a battery module in an exemplary embodiment of this disclosure.

[0036] Figure 6 This is a perspective view of a battery cell in an exemplary embodiment of this disclosure.

[0037] Figure 7 This is a longitudinal cross-sectional view of a battery pack according to an exemplary embodiment of the present disclosure.

[0038] Figure 8 The flow channels of a heat sink in an exemplary embodiment of this disclosure are shown.

[0039] Figure 9 The illustration schematically depicts the temperature rise and suppression of a fire occurring in a battery module within an exemplary embodiment of this disclosure.

[0040] Figure 10 An example of the connection relationship between the upper heat sink and the battery pack cover in an exemplary embodiment of this disclosure is shown.

[0041] Figure 11 Another example of the connection relationship between the upper heat sink and the battery pack cover is shown in an exemplary embodiment of this disclosure. Detailed Implementation

[0042] The advantages and features of this disclosure, as well as methods for achieving such advantages and features, will become apparent from the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed below, but can be implemented in various different forms. Exemplary embodiments are provided merely to complete the disclosure and to allow those skilled in the art to fully understand the category of this disclosure. This disclosure is limited only by the category of the claims. Therefore, in some exemplary embodiments, well-known process steps, well-known device structures, and well-known technologies are not specifically described to avoid obscuring the interpretation of this disclosure. Throughout the specification, the same reference numerals denote the same elements.

[0043] In the accompanying drawings, the thickness of layers and regions is exaggerated for clarity. Throughout the specification, the same reference numerals are assigned to the same parts. When an element such as a layer, film, region, plate, etc., is referred to as "on another element," it may be "directly on the other element," or an intermediate element may be present. Conversely, when an element is referred to as "directly on another element," no intermediate element is present. Furthermore, when an element such as a layer, film, region, plate, etc., is referred to as "below" another element, it may be "directly below" the other element, or an intermediate element may be present. Conversely, when an element is referred to as "directly below another element," no intermediate element is present.

[0044] The battery pack 2000 with improved cooling performance according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0045] Figure 3 A battery pack according to an exemplary embodiment of the present disclosure is shown. Figure 4 This is a perspective view of a battery module according to an exemplary embodiment of this disclosure. Figure 5 This is an exploded perspective view of a battery module according to an exemplary embodiment of this disclosure. Figure 6 This is a perspective view of a battery cell according to an exemplary embodiment of this disclosure. Figure 7 This is a longitudinal cross-sectional view of a battery pack according to an exemplary embodiment of this disclosure. Figure 8 The flow channels of a heat sink in an exemplary embodiment of this disclosure are shown. Figure 9The illustration schematically depicts the temperature rise and suppression during a fire in a battery module according to an exemplary embodiment of this disclosure. Figure 10 An example of the connection relationship between the upper heat sink and the battery pack cover in an exemplary embodiment of this disclosure is shown, and Figure 11 Another example of the connection relationship between the upper heat sink and the battery pack cover in an exemplary embodiment of this disclosure is shown.

[0046] A battery pack 2000 with improved cooling performance according to an exemplary embodiment of the present disclosure may include one or more battery modules 1000 and a housing 2100 for accommodating the battery modules 1000.

[0047] The housing 2100 can accommodate multiple battery modules 1000 and may include a bottom 2110, a side 2120, and a cover 2130, such as Figure 3 and Figure 7 As shown.

[0048] The bottom 2110 of the housing 2100 can be formed in the form of a horizontally extending plate of the housing 2100.

[0049] The side portion 2120 of the housing 2100 forms the side surface of the housing 2100, and may include a left portion 2121 forming the left side surface of the housing 2100, a right portion 2122 forming the right side surface of the housing 2100, a front surface portion 2123 forming the front surface of the housing 2100, and a rear surface portion 2124 forming the rear surface of the housing 2100.

[0050] Therefore, the left side portion 2121 and the right side portion 2122 of the side portion 2120 can be arranged at the left and right edges of the bottom portion 2110, respectively, and the front surface portion 2123 and the rear surface portion 2124 can be arranged at the front and rear edges of the bottom portion 2110, respectively.

[0051] In this exemplary embodiment, the housing 2100 is shown as having a rectangular box shape, but is not limited thereto, and may take various other shapes including polygonal shapes.

[0052] The cover 2130 may be a horizontally extending plate disposed on the upper part of the housing 2100 and may cover the interior space of the housing 2100 defined by the bottom 2110 and the side 2120. The cover 2130 may be connected to the upper end of the side 2120. Specifically, the edge of the cover 2130 may be connected to the upper ends of the left side portion 2121, right side portion 2122, front surface portion 2123 and rear surface portion 2124 constituting the side 2120 by means of, for example, bolts, welding or the like.

[0053] Although not shown, a partition (not shown) may be arranged on the bottom 2110 between the respective battery modules 1000.

[0054] like Figures 4 to 6 As shown, the battery module 1000 may include: a battery cell stack 100, wherein a plurality of battery cells 110 are stacked in one direction; a module housing 200 for accommodating the battery cell stack 100; a busbar frame 300 positioned on the front and / or rear side of the battery cell stack 100; an end plate 400 covering the front and / or rear side of the battery cell stack 100; and busbars 310 and 320 mounted on the busbar frame 300.

[0055] The battery cell stack 100 can be composed of multiple battery cells 110 stacked in one direction, and the multiple battery cells 110 can be electrically connected. The stacking direction of the multiple battery cells 110 can correspond to... Figure 5 The Y-axis direction (or -Y-axis direction) in the middle.

[0056] The length direction of the battery cell stack 100 can be defined as the direction from the front side to the rear side or the opposite direction, and it can correspond to the X-axis direction in the figure. Furthermore, the width direction of the battery cell stack 100 can be defined as the direction from the upper surface to the lower surface or the opposite direction, and it can be the Z-axis direction in the figure.

[0057] The length direction of the battery cell stack 100 can be substantially the same as the length direction of the battery cell 110. The electrode leads 111 and 112 of the battery cell 110 can be positioned on the front and rear sides of the battery cell stack 100, and the busbars 310 and 320 of the battery module 1000 can be arranged close to the front and rear sides of the battery cell stack 100 to facilitate electrical connection with the electrode leads 111 and 112.

[0058] Battery cell 110 can be provided as a pouch-type battery cell, and a pouch-type battery cell can maximize the number of battery cells stacked per unit area. However, battery cell 110 does not necessarily need to be provided as a pouch-type battery cell, but can be provided as a prismatic, cylindrical or various other forms.

[0059] The battery cell 110, provided in the form of a pouch cell, may include an electrode assembly and a cell housing 115 that houses the electrode assembly (see [link]). Figure 6 ).

[0060] The cell housing 115 of the battery cell 110 is used to house the electrode assembly and can be a pouch-type cell housing 115. The cell housing 115 may include a lower housing and an upper housing covering the lower housing, and the upper and lower housings may be integrally formed. Additionally, as... Figure 6 As shown, the connection between the upper and lower shells can be formed into a bent and folded structure. As shown, the upper shell can completely cover the lower shell, and a sealing portion 114 can be formed around its perimeter.

[0061] Each of the upper and lower housings can be constructed from a laminated structure comprising an inner cover layer, a metal layer, and an outer cover layer. The inner cover layer is positioned inside the cell housing 115 relative to the metal layer and, due to its direct contact with the electrode assembly, is required to possess insulating properties and electrolyte tolerance. Furthermore, for external sealing, excellent sealing performance is required; that is, the sealed portion formed by the thermal bonding between the inner cover layers needs to exhibit excellent thermal bond strength. The metal layer is located between the inner and outer cover layers and acts as a barrier layer to prevent moisture or various gases from seeping into the battery from the outside. A preferred material for the metal layer in contact with the inner cover layer is a lightweight aluminum (Al) film with excellent formability. The outer cover layer is positioned outside the cell housing 115 relative to the metal layer. For the outer cover layer, a heat-resistant polymer with excellent tensile strength, moisture impermeability, and gas impermeability can be used to ensure heat and chemical resistance while protecting the electrode assembly. For example, nylon or polyethylene terephthalate can be used.

[0062] Each of the upper and lower housings may be formed with a receiving groove 116, and the electrode assembly may be received in the receiving groove 116 of the upper and lower housings.

[0063] The electrode assembly housed in the cell housing 115 can be one selected from the group consisting of: a wound electrode assembly having a structure in which a diaphragm is inserted between a long sheet-shaped positive electrode and a negative electrode and then wound to form a laminate; a stacked electrode assembly including a cell having a structure in which a stacked rectangular positive electrode and a negative electrode are inserted between them; a stacked-folded electrode assembly in which a long diaphragm is used to wind the cell; and a laminated-stacked electrode assembly in which diaphragms are inserted between the cell cells and attached to each other.

[0064] In addition, the electrode assembly may include two electrode connectors and two electrode leads 111 and 112 respectively connected to the electrode connectors by welding.

[0065] One of the two electrode leads 111 and 112 can be a positive lead connected to the positive terminal, while the other electrode lead 111 or 112 can be a negative lead connected to the negative terminal.

[0066] The lead film 113 can be attached to each of the electrode leads 111 and 112. The lead film 113, which is connected to the electrode leads 111 and 112, is located between the electrode leads 111 and 112 and the cell housing 115 to prevent short circuits between the electrode leads 111 and 112 and the cell housing 115, and to improve the sealing strength, thereby preventing leakage of electrolytes, etc.

[0067] The two electrode leads 111 and 112 are shown arranged on both sides of the electrode assembly, but depending on the arrangement of the electrode connectors, they may alternatively be arranged on only one side of the electrode assembly.

[0068] The module housing 200 can be used to protect the battery cell stack 100 and the electrical components connected to the battery cell stack from external physical impacts, and can house the battery cell stack 100 and the electrical components within the internal space of the module housing 200.

[0069] The structure of the module housing 200 can be varied and can be, for example, a single-frame structure. Here, a single frame can refer to a metal sheet having an integrally formed upper surface, lower surface, and two side surfaces. This single frame can be manufactured by extrusion molding. As another example, the module housing 200 can have a structure in which a U-shaped frame is combined with an upper plate (upper surface 201). If it is a structure in which a U-shaped frame is combined with an upper plate, the structure of the module housing 200 can be formed by combining the upper plate with the upper side of the U-shaped frame (which is a metal sheet in which the lower surface and two side surfaces are combined or integrally formed), and each frame or plate can be manufactured by pressing. In addition to a single frame or a U-shaped frame, the structure of the module housing 200 can also be provided in the form of an L-shaped frame, and can also be provided in various other forms not described in the foregoing examples.

[0070] The module housing 200 can be provided in an open form along the length of the battery cell stack 100. The front and rear sides of the battery cell stack 100 may not be covered by the module housing 200. The electrode leads 111 and 112 of the battery cell 110 may also not be covered by the module housing 200. The front and rear sides of the battery cell stack 100 may be covered by the busbar frame 300, end plate 400, busbars 310 and 320, etc., as described below. This arrangement protects the front and rear sides of the battery cell stack 100 from external physical impacts, etc.

[0071] Compression pad 150 can be positioned between the battery cell stack 100 and an inner surface of the module housing 200.

[0072] Compression pad 150 can be arranged to face the outermost battery cell 110 of battery cell stack 100 in the Y-axis direction of the figure.

[0073] Furthermore, although not shown, thermally conductive resin can be injected between the inner surfaces of the battery cell stack 100 and the module housing 200, and a thermally conductive resin layer (not shown) can be formed between one inner surface of the battery cell stack 100 and the module housing 200 by the injected thermally conductive resin. In this case, the thermally conductive resin layer can be positioned on the Z-axis of the battery cell stack 100 and can be formed between the battery cell stack 100 and the bottom surface of the module housing 200 positioned on the -Z-axis.

[0074] The busbar frame 300 is positioned on one side of the battery cell stack 100 and can cover one side of the battery cell stack 100, while guiding the connection between the battery cell stack 100 and external devices. Specifically, the busbar frame 300 can be positioned on the front or rear side of the battery cell stack 100, as shown in the figure. At least one of the busbars 310 and 320, as well as the module connector, can be mounted on the busbar frame 300. Figure 5 As shown, one surface of the busbar frame 300 can be connected to the front or rear side of the battery cell stack 100, and the other surface of the busbar frame 300 can be connected to the busbars 310 and 320.

[0075] The busbar frame 300 may include an electrically insulating material. The busbar frame 300 may limit contact between the busbars 310 and 320 and the portion of the battery cell 110 except for the portion that is joined to the electrode leads 111 and 112, and may prevent electrical short circuits.

[0076] The busbar frame 300 can be positioned on each of the front and rear sides of the battery cell stack 100.

[0077] Busbars 310 and 320 can be mounted on one surface of the busbar frame 300 and can be used to electrically connect the battery cell stack 100 or the battery cell 110 to external device circuitry. By positioning the busbars 310 and 320 between the battery cell stack 100 or the busbar frame 300 and the end plate 400, the busbars 310 and 320 can be protected from external impacts, etc., and the degradation of durability caused by external moisture, etc., can be minimized.

[0078] Busbars 310 and 320 can be electrically connected to the battery cell laminate 100 via electrode leads 111 and 112 of the battery cell 110.

[0079] Specifically, the electrode leads 111 and 112 of the battery cell 110 can be bent and connected to the busbars 310 and 320 after passing through the slits formed in the busbar frame 300. The battery cells 110 constituting the battery cell stack 100 can be connected in series or in parallel through the busbars 310 and 320.

[0080] Busbars 310 and 320 may include a terminal busbar 320 for electrically connecting one battery module 1000 to another battery module 1000. At least a portion of the terminal busbar 320 may be exposed outside the end plate 400 for connection to the other battery module 1000, and the end plate 400 may be provided with a terminal opening 410 for this purpose.

[0081] Unlike the other busbar 310, the terminal busbar 320 may also include an upwardly projecting protrusion, which may be exposed to the outside of the battery module 1000 through the terminal opening 410. The terminal busbar 320 may be connected to another battery module 1000 or a battery disconnect unit (BDU) through the protrusion exposed through the terminal opening 410, and may form a high-voltage (HV) connection with the other battery module 1000 or BDU.

[0082] The end plate 400 can be used to protect the battery cell stack 100 and the electrical components connected to the battery cell stack from external physical impacts by covering the open surface of the module housing 200. For this purpose, the end plate 400 can be made of a material with a predetermined strength, and may include, for example, a metal (such as aluminum).

[0083] The end plate 400 can be connected to the module housing 200 while covering the busbar frame 300 or busbars 310 and 320 located on one side of the battery cell stack 100. The corners of the end plate 400 can be connected to the corresponding corners of the module housing 200 by welding or the like.

[0084] Furthermore, an insulating cover 500 for electrical insulation can be disposed between the end plate 400 and the busbar frame 300. The insulating cover 500 may include an electrically insulating material and can prevent the busbars 310 and 320 from contacting the end plate 400. The insulating cover 500 may be positioned on the inner surface of the end plate 400 and can be in close contact with the inner surface of the end plate 400. However, such limitation is not intended. The end plate 400 may be positioned on one side and the other side of the module housing 200 to cover both sides of the battery cell laminate 100, respectively.

[0085] In addition, the battery pack 2000 according to this disclosure may also include a coolant inlet 2200, a coolant outlet 2300, a lower radiator 2400, an upper radiator 2500, and a flame cover sheet 3000.

[0086] Coolant inlet 2200 allows coolant to flow into battery pack 2000 from the outside, and coolant flows into battery pack 2000 from the outside through coolant inlet 2200. Coolant introduced through coolant inlet 2200 can flow into upper radiator 2500 and lower radiator 2400. For example... Figure 3 As shown, the coolant inlet 2200 can be located on one side of the side portion 2120 of the housing 2100, but its position can be changed. The coolant can be, for example, cooling water.

[0087] Coolant outlet 2300 allows coolant to flow out of battery pack 2000, and coolant flows out of battery pack 2000 to the outside through coolant outlet 2300. Coolant discharged from upper radiator 2500 and lower radiator 2400 can move to coolant outlet 2300.

[0088] like Figure 7 As shown, a lower heat sink 2400 can be arranged at the lower part of the battery pack 2000 to cool the lower part of the battery pack 2000. Specifically, the lower heat sink 2400 can be arranged on the underside of the bottom 2110 of the battery pack 2000 and can be connected to the bottom 2110. The lower heat sink 2400 may include a cooling channel 2410 through which coolant introduced through the inlet 2411 moves. Therefore, when the coolant moves through the cooling channel 2410, the lower part of the battery pack 2000 is cooled, and the coolant can be discharged through the outlet 2412 formed at one end of the cooling channel 2410.

[0089] An upper radiator 2500 can be disposed on the upper part of the battery pack 2000 to cool the upper part of the battery pack 2000. Specifically, the upper radiator 2500 can be disposed on the upper side of the cover 2130 of the battery pack 2000 and can be connected to the cover 2130. The upper radiator 2500 may include a cooling channel 2510 through which coolant moves. Coolant can be introduced through an inlet 2511 formed at one end of the cooling channel 2510, and as the coolant moves through the cooling channel 2510, the coolant can cool the upper part of the battery pack 2000 (or the cover 2130). Coolant can be discharged through an outlet 2512 formed at the other end of the cooling channel 2510. Therefore, the upper radiator 2500 can control the temperature of the cover 2130.

[0090] Figure 8 Examples of cooling channels 2510, 2410 of the upper radiator 2500 (or lower radiator 2400) are shown.

[0091] The cooling channels 2510 or 2410 of the upper radiator 2500 (or lower radiator 2400) can be formed in a zigzag shape as shown in the figure, and the inlet 2511 or 2411 for introducing coolant can be arranged at one end of the cooling channel 2510 or 2410, and the outlet 2512 or 2412 for discharging coolant can be arranged at the other end of the cooling channel 2510 or 2410.

[0092] A flame cover 3000 can be attached to the cover 2130 to protect the cover 2130 and the upper heat sink 2500 from flames caused by a fire in the battery module 1000. Specifically, in this exemplary embodiment, the flame cover 3000 can be attached to the lower part of the cover 2130 and can be attached to contact the lower surface of the cover 2130. For example, the flame cover 3000 can be attached to the lower surface of the cover 2130 by applying an adhesive (e.g., a structural adhesive) to one surface of the flame cover.

[0093] The flame cover sheet 3000 can be made of mica or FRB (available from 3M) or other refractory materials, or may include mica and other refractory materials.

[0094] In this exemplary embodiment, the flame cover 3000 is arranged below the cover 2130 in such a way that when a fire occurs due to the ignition of the battery module 1000 located below the flame cover 3000, the cover 2130 and the upper heat sink 2500 can be protected from the fire, and the collapse of the upper structure of the battery pack 2000 can be prevented.

[0095] According to an exemplary embodiment of this disclosure, the battery pack 2000 includes an upper heat sink 2500 and a lower heat sink 2400, respectively cooling the upper and lower portions of the battery pack 2000. For example... Figure 9 As shown, when thermal runaway (or thermal propagation) occurs due to a fire in the battery module 1000 within the battery pack 2000 (an unpredictable explosion or ejection of gas or flame caused by abnormal behavior within the battery cell), the flame cover 3000 protects the cover 2130 and the upper heat sink 2500 from the flame, and the temperature rise of the cover 2130 caused by the flame and gas can be controlled by the upper heat sink 2500. Furthermore, the temperature of the cover 2130 is controlled by the upper heat sink 2500 within the battery pack 2000, and internal air cooling is performed, thereby delaying heat transfer and preventing the collapse of the upper structure of the battery pack 2000 (cover 2130 and upper heat sink 2500).

[0096] Figure 10 and Figure 11 An example of the upper radiator 2500 being attached to the cover 2130 is shown.

[0097] Figure 10 An example is shown in which the upper radiator 2500 is connected to the cover 2130 via a fastening member 2600. Specifically, the upper radiator 2500 can be connected to the cover 2130 via the fastening member 2600 on the upper side of the cover 2130 (the flame cover plate 3000 is attached to the lower surface of the cover 2130). The fastening member 2600 can be a bolt or the like.

[0098] exist Figure 11 In the middle, the upper radiator 2500 can be attached to the cover 2130 using resin 2550 or a pad, and then it can be fixed to the body (e.g., BIW (body in white)).

[0099] Specifically, the upper radiator 2500 can be initially attached to the cover 2130 by the adhesion of a resin (e.g., a thermally conductive resin) or a pad. In this state, the upper radiator 2500 can be additionally secured by the fixing member 2700 when the battery pack 2000 is fastened to the vehicle by the fixing member 2700.

[0100] The fixing member 2700 may include an upper member 2710 disposed on the upper part of the upper radiator 2500 and a connecting member 2720 extending from one or both ends of the upper member 2710, and one end of the connecting member 2720 may be fastened to the vehicle body. Therefore, the fixing member 2700 may be disposed on the upper part of the upper radiator 2500 and may be used to fix the upper radiator 2500 and the battery pack 2000.

[0101] The battery pack according to this disclosure may additionally include various control and protection systems, such as a battery management system (BMS).

[0102] The battery module 1000 and battery pack 2000 according to this disclosure can be applied to a variety of devices. Specifically, they can be applied to transportation vehicles, such as electric bicycles, electric vehicles and hybrid vehicles, or energy storage systems (ESS), but are not limited thereto, and can be applied to a variety of other devices that use secondary batteries.

[0103] Although this disclosure has been described with reference to the preferred exemplary embodiments described above, this disclosure is not limited to the exemplary embodiments described above, and various changes and modifications can be made by those skilled in the art without departing from the spirit of this disclosure.

[0104] Industrial application

[0105] The present invention provides a battery pack that can delay heat transfer, control the temperature of the battery pack cover, and prevent the upper structure of the battery pack from collapsing when excessive temperature rise or fire occurs in the battery modules within the battery pack.

Claims

1. A battery pack, the battery pack comprising: One or more battery modules; A housing configured to house the battery module; as well as An upper heat sink is located on the upper part of the housing and arranged above the battery module.

2. The battery pack according to claim 1, wherein, The upper radiator includes cooling channels through which coolant flows.

3. The battery pack according to claim 1, further comprising a flame cover plate located on the upper part of the battery module and arranged below the upper heat sink.

4. The battery pack according to claim 3, wherein, The flame covering sheet includes mica.

5. The battery pack according to claim 1, wherein, The housing includes a cover disposed on the upper side of the battery module.

6. The battery pack according to claim 5, wherein, The upper radiator is located on the upper side of the cover.

7. The battery pack according to claim 6, further comprising a flame covering sheet disposed above the battery module. in, The flame covering sheet is arranged on the underside of the cover.

8. The battery pack according to claim 7, wherein, The flame cover is attached to the lower surface of the cover.

9. The battery pack according to claim 8, wherein, The flame cover is attached to the cover by an adhesive.

10. The battery pack according to claim 6, wherein, The upper radiator is connected to the cover.

11. The battery pack according to claim 10, wherein, The upper radiator is connected to the cover via fastening components.

12. The battery pack according to claim 11, wherein, The fastening component is a bolt.

13. The battery pack according to claim 6, wherein, Resin is disposed between the upper radiator and the cover.

14. The battery pack according to claim 6, wherein, A pad is arranged between the upper radiator and the cover.

15. The battery pack of claim 1, further comprising a lower heat sink disposed at the lower part of the housing and including cooling channels through which coolant flows.

16. The battery pack of claim 6, further comprising a fixing member for securing the upper heat sink to the battery pack. in, The fixing member is fixed to the vehicle on which the battery pack is installed.

17. The battery pack according to claim 16, wherein, The fixing member includes an upper member disposed on the upper side of the upper radiator and a connecting member extending from one end of the upper member, and one end of the connecting member is fastened to the vehicle.

Images