Battery pack

Abstract

The present invention relates to a battery pack for accommodating a battery cell assembly including a pair of external terminals, the battery pack comprising: a battery pack case on which the battery cell assembly is disposed, in which the battery pack case comprises: a bottom plate supporting the bottoms of a plurality of battery cell assemblies; and a protective cover coupled to a central portion of the base plate, the protective cover covering an external terminal of each of the accommodated cell assemblies.

Description

Technical Field

[0001] This disclosure relates to a battery pack that houses a plurality of cell assemblies including a pair of external terminals.

[0002] This application claims the benefit of Korean Patent Application No. 10-2024-0039923, filed on March 22, 2024, the disclosure of which is incorporated herein by reference. Background Technology

[0003] Battery packs used in electric vehicles and the like have a structure that connects multiple cell assemblies, including multiple secondary batteries, in series or parallel to achieve high power output. Furthermore, the secondary batteries can be repeatedly charged and discharged through electrochemical reactions between components including electrodes, separators, and electrolytes.

[0004] Figure 1 This is a three-dimensional view of a conventional battery pack, which includes multiple cell assemblies 10 and a battery pack housing 20 for housing the cell assemblies 10.

[0005] Each cell assembly 10 includes a pair of external terminals, wherein each cell assembly 10 is electrically connected via a separate busbar connecting the external terminals.

[0006] Furthermore, in the event of a short circuit in any of the cell assemblies 10 housed in the battery pack housing 20, a spark accompanied by high heat may be generated. If such sparks splash and come into contact with the busbars, they could instantly short-circuit a large number of cell assemblies 10, potentially leading to a large explosion or fire.

[0007] In particular, since the cell assembly 10 housed in most battery packs is positioned such that the external terminals face the center of the battery pack housing 20, there is a high probability that the busbars will come into contact with the sparks. In other words, because conventional battery packs have a structure where the busbars are concentrated in the center, they are prone to large fires in the event of a short circuit causing a spark or flame.

[0008] (Prior art literature) Korean Patent Publication No. 10-2022-0001228 Summary of the Invention

[0009] Technical issues

[0010] Therefore, this disclosure is invented to solve the above-mentioned problems, and its object is to provide a battery pack having the following configuration. This configuration can prevent splashed spark discharge from contacting the busbar and conductors.

[0011] Other objects and advantages of this disclosure will be understood from the following description, and will become more apparent with reference to embodiments of this disclosure. It will also be apparent with reference to embodiments of this disclosure that the objects and advantages of this disclosure can be embodied by means set forth in the claims of the patent and combinations thereof.

[0012] Technical solution

[0013] According to this disclosure, a battery pack is provided for housing a cell assembly including a pair of external terminals.

[0014] The battery pack includes a battery pack housing, in which cell assemblies are housed. The battery pack housing includes: a base plate that supports the lower part of the cell assemblies; and a protective cover that is connected to the central portion of the base plate, wherein the protective cover covers the external terminals of each cell assembly housed therein.

[0015] The protective cover can be formed as a central portion across the base plate and extend along the length of the battery pack casing.

[0016] Multiple cell assemblies are symmetrical about each other in the width direction of the battery pack housing and are arranged along the length direction of the battery pack housing, wherein a protective cover can be configured to cover the space between a pair of spaced-apart cell assemblies.

[0017] A pair of battery cell assemblies are spaced apart from each other such that the sides where the external terminals are located face each other, and a protective cover can be provided to cover the upper part of the external terminals of the battery cell assemblies.

[0018] The protective cover may include a material that has at least one of heat resistance and fire resistance.

[0019] The battery pack housing also includes a connecting busbar that electrically connects any pair of adjacent cell assemblies, wherein both ends of the connecting busbar are connected to external terminals included on each cell assembly, and wherein a protective cover may cover the upper part of the connecting busbar.

[0020] The battery pack housing also includes a busbar cover, which is formed to correspond to the shape of the connecting busbar and cover the upper part of the connecting busbar, wherein a protective cover may cover the upper part of the busbar cover.

[0021] The battery pack housing also includes a sheath member located between the connecting busbar and the busbar cover and covering the upper part of the connecting busbar, wherein the sheath member may include an insulating material.

[0022] The base plate includes a protrusion that is spaced apart and protrudes along the central portion of the battery pack housing at predetermined intervals, wherein a protective cover can be attached to and secured to the protrusion.

[0023] The height of the upper part of the protrusion can be at least higher than the height of the external terminals of the cell assembly.

[0024] The protective cover includes an insertion hole that opens corresponding to the position of the protrusion, wherein the protective cover can be attached to the base plate so that the protrusion is inserted into the insertion hole.

[0025] The protrusion includes a connecting groove at its upper end, wherein the protective cover also includes a lower protrusion that protrudes downward corresponding to the position of the protrusion, and the lower protrusion has a diameter that can be inserted into the connecting groove, wherein the protective cover can be connected to the base plate by inserting the lower protrusion into the connecting groove.

[0026] The battery pack housing includes a central beam that extends across a central portion and connects to a base plate, wherein multiple cell assemblies are arranged symmetrically with respect to each other about the central beam and along the length of the battery pack housing, wherein a protective cover can be attached to the upper end of the central beam.

[0027] The battery cell assembly includes: a battery cell stack having multiple battery cells stacked thereon, with electrode leads extending from the multiple battery cells; and an end plate connected to the front and rear surfaces of the battery cell stack, wherein external terminals may be formed on the end plate connected at positions corresponding to the electrode leads for electrical connection to the electrode leads.

[0028] The cell assembly may also include a module frame that surrounds the periphery of the cell stack and is connected to an end plate.

[0029] The module frame includes: a lower frame that supports the lower part of the battery cell stack; an upper frame that supports the upper part of the battery cell stack; and a pair of side frames that support both sides of the battery cell stack, wherein the upper frame may include multiple openings.

[0030] Beneficial effects

[0031] According to this disclosure, a protective cover configuration covering the busbar and conductors can be used to prevent the busbar from directly contacting spark discharge. Attached Figure Description

[0032] Figure 1 It is a 3D diagram of a conventional battery pack.

[0033] Figure 2 This is a perspective view of a battery pack according to a first embodiment of the present disclosure.

[0034] Figure 3 yes Figure 2 A 3D view of the battery pack with its protective cover removed.

[0035] Figure 4 yes Figure 2 and Figure 3 A top view of the battery pack.

[0036] Figure 5 This is a 3D view of the battery cell assembly.

[0037] Figure 6 It is a 3D view of the connection between the busbar and the protective cover.

[0038] Figure 7 This is a perspective view of a battery pack according to a second embodiment of the present disclosure.

[0039] Figure 8 It is a three-dimensional view of the connection between the busbar, the busbar cover, and the protective cover.

[0040] Figure 9 This is a perspective view of a battery pack according to a third embodiment of the present disclosure.

[0041] Figure 10 yes Figure 9 A top view of the battery pack.

[0042] Figure 11 This is a perspective view of a battery pack according to the fourth embodiment of this disclosure.

[0043] Figure 12 yes Figure 11 A 3D view of the battery pack with its protective cover removed.

[0044] Figure 13 This is a perspective view of a battery pack according to the fifth embodiment of this disclosure. Detailed Implementation

[0045] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that the terms and words used in this specification and claims should not be interpreted in their ordinary or dictionary sense, but rather based on the principle that the inventor can define the concepts of terms they deem most suitable for describing the disclosure, and are to be interpreted in a meaning and concept consistent with the technical spirit of the present disclosure.

[0046] Therefore, it should be understood that the embodiments described herein and the configurations shown in the accompanying drawings are merely the most preferred embodiments of this disclosure and are not an exhaustive list of the technical ideas of this disclosure, and various equivalents and modifications that can be substituted for them at the time of submission may exist.

[0047] Furthermore, in describing this disclosure, detailed descriptions of relevant known configurations or features have been omitted where such descriptions would obscure the essence of this disclosure.

[0048] Because embodiments of this disclosure are provided to more fully explain the disclosure to those skilled in the art, the shapes and dimensions of components in the drawings may be exaggerated, omitted, or shown schematically for clarity. Therefore, the dimensions or proportions of each component do not necessarily indicate its actual size or proportion.

[0049] This disclosure relates to a battery pack that houses a plurality of cell assemblies including a pair of external terminals.

[0050] Figures 2 to 6 A battery pack according to a first embodiment of the present disclosure is shown. Figures 7 to 8 A battery pack according to a second embodiment of the present disclosure is shown. Figures 9 to 10 A battery pack according to a third embodiment of the present disclosure is shown. Figures 11 to 12 A battery pack according to a fourth embodiment of the present disclosure is shown, and Figure 13 A battery pack according to a fifth embodiment of the present disclosure is shown.

[0051] In the following, specific embodiments of the battery pack of this disclosure will be described in detail with reference to the accompanying drawings. For reference, unless otherwise defined, relative positioning terms such as front and back, up and down, left and right, and right and left are used in the following description to aid in understanding this disclosure and to refer to the orientations shown in the drawings.

[0052] Here, the width direction of the battery cell assembly is defined as the direction in which the battery cells are stacked, and the length direction of the battery cell assembly is defined as the direction orthogonal to the width direction of the battery cell assembly, that is, the direction in which the two sides connected to the end plate are connected.

[0053] In addition, the width direction (D2) of the battery pack housing refers to the length direction of the cell assembly housed in the battery pack housing, and the length direction (D1) of the battery pack housing refers to the width direction of the cell assembly housed in the battery pack housing.

[0054] (First Implementation)

[0055] Figure 2 This is a perspective view of the battery pack 1 according to the first embodiment of this disclosure. Figure 3 From Figure 2 A 3D view of battery pack 1 without its protective cover (400). Figure 4 yes Figure 2 and Figure 3 A top view of battery pack 1, and Figure 5 This is a 3D view of battery cell assembly 100.

[0056] The battery pack 1 disclosed herein includes a battery pack housing 1000, in which a cell assembly 100 is disposed.

[0057] Additionally, the battery pack 1 of this disclosure may also include an upper housing (not shown) connected to the battery pack housing 1000 to cover the upper part of the cell assembly 100 housed in the battery pack housing 1000. However, the upper housing is outside the scope of this disclosure and will therefore not be described in detail.

[0058] The cell assembly 100 includes a cell stack, which is a plurality of cells (not shown) stacked in one direction with electrode leads extending therefrom.

[0059] Each of the cells includes an electrode assembly consisting of alternating layers of electrodes and separators, electrode leads connected to the electrodes, a housing surrounding the electrode assembly so that the electrode leads extend outwards, and an electrolyte filled within the housing together with the electrode assembly.

[0060] The electrode can be a positive electrode coated with a slurry containing a positive active material, a binder resin, a conductive material, and other additives on at least one side of the current collector, or a negative electrode coated with a slurry containing a negative active material, a binder resin, a conductive material, and other additives on at least one side of the current collector. Therefore, the electrode assembly includes alternating layers of positive electrodes, a separator, and a negative electrode.

[0061] The positive electrode active material may include lithium-containing transition metal oxides, and the negative electrode active material may include lithium metal, carbon materials and metal compounds or mixtures thereof, from which lithium ions may be adsorbed and released.

[0062] The separator can be a conventional porous polymer membrane used in lithium secondary batteries.

[0063] The shell is a sheet material processed into a predetermined shape. In this case, the sheet material is a multi-layer structure comprising an outermost resin layer, a metal layer, and an inner resin layer. The outermost resin layer is made of an insulating material such as polyethylene terephthalate (PET) or nylon, the metal layer is made of aluminum to maintain mechanical strength and prevent moisture and oxygen penetration, and the inner resin layer is made of a polyolefin-based material that has thermal adhesion and is used as a sealing material.

[0064] The sheet forming the housing may have predetermined adhesive resin layers inserted between the inner resin layer and the metal layer, and between the outer resin layer and the metal layer, as needed. The adhesive resin layers are used for smooth attachment between different materials and are formed in single or multiple layers. The materials are typically polyolefin-based resins, or polyurethane resins that can be used for smoothing processes, or mixtures thereof.

[0065] Based on the shape of the electrode assembly and the housing, battery cells can be classified into prismatic, pouch, and cylindrical types. However, in the detailed description and accompanying drawings of this disclosure, pouch-type battery cells will be described by way of example for ease of understanding.

[0066] The front and rear surfaces of the cell stack can be connected to the end plate 110 configured to protect and support the cell stack.

[0067] The cell assembly 100 also includes an external terminal 111, which is electrically connected to an electrode lead extending from the cell laminate.

[0068] An external terminal 111 is formed on an end plate 110, and at least one end of the external terminal 111 is formed to be exposed outside the end plate 110.

[0069] Specifically, external terminals 111 are formed on a pair of end plates 110 located on the front and rear surfaces of the cell assembly 100, at positions corresponding to the electrode leads of the cell stack.

[0070] Reference Figures 3 to 5 External terminals 111 are formed on end plates 110 located on the front surface of the cell assembly 100.

[0071] like Figure 5 As shown, the cell assembly 100 also includes a module frame that surrounds the periphery of the cell stack and is connected to the end plate 110.

[0072] The module frame includes a lower frame (not shown) supporting the lower part of the battery cell stack, an upper frame 120 supporting the upper part of the battery cell stack, and a pair of side frames 130 supporting both sides of the battery cell stack.

[0073] like Figure 5 As shown, the upper frame 120 of this disclosure includes an opening 121 that is opened to allow rapid discharge of gases, flames, and spark particles in the event of thermal runaway inside the cell assembly 100 due to a short circuit or the like. Therefore, in the event of thermal runaway in the cell stack surrounded by the module frame, gases and spark particles can be discharged upwards through the opening 121.

[0074] Multiple cell assemblies 100 are arranged symmetrically with respect to each other in the width direction D2 of the battery pack housing 1000 and along the length direction D1 of the battery pack housing 1000. Specifically, as Figure 3 and Figure 4 As shown, each cell assembly 100 is configured such that the external terminal 111 faces the center of the battery pack housing 1000. In this case, as... Figure 3 and Figure 4 As shown, since a pair of symmetrical cell assemblies 100 are spaced apart at a predetermined distance, a hollow space is formed in the center of the battery pack housing 1000.

[0075] Conductors, etc., can be placed in the hollow space.

[0076] The battery pack housing 1000 also includes a connection busbar 200 for electrically connecting any pair of adjacent cell assemblies 100.

[0077] Reference Figure 3 and Figure 4 The two ends of any one of the connecting busbars 200 located between a pair of cell assemblies 100 are connected to an external terminal 111 included on each cell assembly 100.

[0078] Each of the battery cell assemblies 100 is configured such that its two external terminals 111 face the center of the battery pack housing 1000. Therefore, the connecting busbar 200 is also located in the central region of the battery pack housing 1000.

[0079] According to some embodiments, the battery pack housing 1000 may also include a sheathing member covering the upper part of the busbar.

[0080] The sheathing components include an insulating material used to insulate a portion of the connecting busbar 200 from short-circuit circuits and static electricity.

[0081] Because it is necessary to cover and insulate the entire upper part of the connecting busbar 200, the sheath member is formed to correspond to the shape of the connecting busbar 200.

[0082] The battery pack housing 1000 disclosed herein includes a plate-shaped base plate and side beams 700. The plate-shaped base plate supports the lower part of the cell assembly 100, and the side beams 700 are connected to the base plate along the edge of the base plate to support the side of the cell assembly 100 disposed on the base plate.

[0083] In some embodiments, the battery pack 1 may further include a crossbeam 800, which is inserted between any pair of adjacent cell assemblies 100 and separates each cell assembly 100 relative to the length direction D1 of the battery pack housing 1000, such as... Figures 2 to 4 As shown.

[0084] The crossbeam 800 can be used to separate the sides of each cell assembly 100 to avoid contact, or it can be used to support the sides of each cell assembly 100.

[0085] The battery pack housing 1000 disclosed herein also includes a protective cover 400 connected to the central portion of the base plate.

[0086] The protective cover 400 is used to cover and protect a portion of the internal space of the battery pack housing 1000.

[0087] like Figures 2 to 4 As shown, the protective cover 400 covers the space between a pair of spaced-apart battery cell assemblies 100 at the central portion of the base plate.

[0088] Figure 6 This is a 3D view of the connection between the busbar 200 and the protective cover 400.

[0089] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the protective cover 400 covers the space between the cell assemblies 100, while also covering and protecting the external terminals 111 of each cell assembly 100.

[0090] like Figure 4 As shown, the protective cover 400 is configured to cover both the external terminal 111 of the battery cell assembly 100 and the connecting busbar 200 connected to the external terminal 111.

[0091] like Figure 2 and Figure 3 As shown, the protective cover 400 is formed to extend across the center of the bottom plate along the length direction D1 of the battery pack housing 1000.

[0092] For example, the protective cover 400 protects the external terminals 111 of each cell assembly 100 located under the protective cover 400 from splashed spark particles, flames and high-temperature gases.

[0093] The protective cover 400 comprises a material having at least one of heat resistance and fire resistance. For example, the protective cover 400 may comprise mica.

[0094] In addition, the protective cover 400 may also include an insulating material. For example, the protective cover 400 may also include fiberglass.

[0095] *

[0096] The battery pack 1 disclosed herein, by means of a protective cover 400 covering the upper part of the connecting busbar 200, can minimize the impact on other battery cell assemblies 100 even if one of the cell assemblies 100 explodes or generates sparks due to an internal short circuit or the like, and generates spark particles.

[0097] Furthermore, the battery pack 1 disclosed herein can simultaneously protect the external terminals 111 of each cell assembly 100 and the connecting busbar 200, as well as the conductors that can be installed in the central part of the battery pack housing 1000, through the protective cover 400.

[0098] (Second Implementation)

[0099] Figure 7 This is a perspective view of battery pack 1 according to the second embodiment of this disclosure, and Figure 8 It is a three-dimensional view of the connection between the busbar 200, the busbar cover 300, and the protective cover 400.

[0100] According to the second embodiment of the present disclosure, the battery pack 1 includes a battery pack housing 1000 and a busbar cover 300.

[0101] like Figure 7 and Figure 8 As shown, the manifold cover 300 is formed to correspond to the shape of the connecting manifold 200 and covers the upper part of the connecting manifold 200.

[0102] The manifold cover 300 covers the connecting manifold 200 to protect it from external spark particles, flames, and high-temperature gases. Therefore, the manifold cover 300 comprises a material having at least one of heat resistance and fire resistance. For example, the manifold cover 300 may comprise mica.

[0103] like Figure 7 and Figure 8 As shown, the protective cover 400 covers and protects the external terminal 111, the connecting busbar 200 that connects to the external terminal 111, and the upper part of the busbar cover 300 that protects the connecting busbar 200.

[0104] In some embodiments, the battery pack housing 1000 may further include a sheath member located between the connecting busbar 200 and the busbar cover 300 to cover the upper part of the connecting busbar 200.

[0105] (Third implementation method)

[0106] Figure 9 This is a perspective view of battery pack 1 according to the third embodiment of this disclosure, and Figure 10 yes Figure 9 A top view of battery pack 1.

[0107] The battery pack housing 1000 included in the battery pack 1 according to the third embodiment of the present disclosure also includes a central beam 500.

[0108] The central beam 500 is inserted into the hollow space between the cell assemblies 100 spaced apart at a predetermined distance in the width direction D2 of the battery pack housing 1000, and is used to separate each cell assembly 100.

[0109] like Figure 9 and Figure 10 As shown, the central beam 500 extends across the center of the battery pack housing 1000 and connects to the base plate. Therefore, with respect to the width direction D2 of the battery pack housing 1000, a plurality of cell assemblies 100 are arranged symmetrically with respect to the central beam 500 and along the length direction D1 of the battery pack housing 1000.

[0110] According to some implementations, the central beam 500 may be hollow and used as a channel for gas to move therethrough.

[0111] According to some other embodiments, the central beam 500 may be hollow and contain conductors, etc. inside.

[0112] The protective cover 400 can be attached to the upper end of the center beam 500 to protect the external terminal 111, the connecting busbar 200 and the center beam 500.

[0113] In addition, such as Figure 9 and Figure 10 As shown, the protective cover 400 can protect the busbar cover 300 located on the upper part of the connecting busbar 200.

[0114] (Fourth Implementation)

[0115] Figure 11 This is a perspective view of battery pack 1 according to the fourth embodiment of this disclosure, and Figure 12 From Figure 11 A 3D view of battery pack 1 with the protective cover removed (400).

[0116] The battery pack housing 1000 included in the battery pack 1 according to the fourth embodiment of the present disclosure also includes a protrusion 600.

[0117] like Figure 11 and Figure 12 As shown, the protrusion 600 protrudes at predetermined intervals along the center of the battery pack housing 1000.

[0118] The protective cover 400 of this disclosure can be secured by connecting with a protrusion 600 that projects upward from the base plate.

[0119] The protective cover 400 includes an insertion hole 410 that opens corresponding to the position of the protrusion 600, and the protective cover 400 is connected to the base plate such that the protrusion 600 is inserted into the insertion hole 410, as shown below. Figure 11 As shown.

[0120] Preferably, the protrusion 600 has a height that allows it to be inserted into the insertion hole 410 of the protective cover 400 that covers the external terminals 111 of the cell assembly 100 and the connecting busbar 200, etc. Therefore, the upper end height of the protrusion 600 is at least as high as the height of the external terminals 111 of the cell assembly 100 housed in the battery pack housing 1000.

[0121] Furthermore, in some embodiments, in the case of a battery pack 1 having a busbar cover 300, the upper end of the protrusion 600 is at least higher than the height of the busbar cover 300.

[0122] The protrusion 600 is inserted into the insertion hole 410 of the protective cover 400, thereby restricting the horizontal movement of the protective cover 400. Therefore, the protective cover 400 can be reliably fixed to the central part of the battery pack housing 1000 without any horizontal movement.

[0123] (Fifth implementation method)

[0124] Figure 13 This is a perspective view of battery pack 1 according to the fifth embodiment of this disclosure.

[0125] The battery pack housing 1000 included in the battery pack 1 according to the fifth embodiment of this disclosure also includes a protrusion 600. Furthermore, the protective cover 400 also includes a lower protrusion 420 formed at a position corresponding to the protrusion 600.

[0126] like Figure 13 As shown, the protrusion 600 includes a connecting groove 610 at its upper end, and the lower protrusion 420 protrudes toward the lower part corresponding to the position of the protrusion 600.

[0127] The protective cover 400 is connected to the base plate by inserting the lower protrusion 420 into the connecting groove 610 of the protrusion 600.

[0128] The shape of the lower protrusion 420 corresponds to the shape of the connecting groove 610.

[0129] Furthermore, the diameter of the lower protrusion 420 is preferably a size that allows it to be inserted into the connecting groove 610.

[0130] By inserting the lower protrusion 420 into the connecting groove 610 of the protrusion 600, the horizontal movement of the lower protrusion 420 can be restricted. That is, the protective cover 400 can be reliably fixed in the center of the battery pack housing 1000 without swinging in the horizontal direction.

[0131] The present disclosure has been described in more detail above with reference to the accompanying drawings and embodiments. However, it should be understood that the configurations shown in the drawings or the embodiments described herein are merely one embodiment of the present disclosure and do not represent the entirety of the technical ideas of the present disclosure. Various equivalents and modifications may exist that can replace them when the present disclosure is submitted.

[0132] (Explanation of reference numerals in the attached image)

[0133] 10: (Prior art) Battery cell assembly

[0134] 20: (Prior art) Battery pack casing

[0135] 1: Battery pack

[0136] 1000: Battery pack casing

[0137] 100: Battery cell assembly

[0138] 110: End plate

[0139] 111: External terminal

[0140] 120: Upper frame

[0141] 121: Opening hole

[0142] 130: Side frame

[0143] 200: Connect busbar

[0144] 300: Busbar Cover

[0145] 400: Protective cover

[0146] 410: Insertion Hole

[0147] 420: Lower protrusion

[0148] 500: Center beam

[0149] 600: Protrusion

[0150] 610: Connecting slot

[0151] 700: Side beam

[0152] 800: Crossbeam

[0153] D1: Length direction of battery pack casing

[0154] D2: Width direction of battery pack casing

Claims

1. A battery pack for housing a cell assembly including a pair of external terminals, the battery pack comprising: A battery pack housing, in which the battery cell assembly is housed, wherein... The battery pack housing includes: A base plate, which supports the lower part of the battery cell assembly; and A protective cover, wherein the protective cover is attached to the central portion of the base plate, wherein, The protective cover covers the external terminals of each cell assembly it contains.

2. The battery pack according to claim 1, wherein, The protective cover is formed across the central portion of the base plate and extends along the length of the battery pack housing.

3. The battery pack according to claim 1, wherein, The plurality of said cell assemblies are symmetrical to each other about the width direction of the battery pack housing and are arranged along the length direction of the battery pack housing, wherein, The protective cover is configured to cover the space between a pair of spaced-apart battery cell assemblies.

4. The battery pack according to claim 1, wherein, A pair of battery cell assemblies are spaced apart from each other such that the sides where the external terminals are located face each other. The protective cover is configured to cover the upper part of the external terminals of the battery cell assembly.

5. The battery pack according to claim 1, wherein, The protective cover comprises a material having at least one of heat resistance and fire resistance.

6. The battery pack according to claim 1, wherein, The battery pack housing also includes: A connecting busbar is provided, which electrically connects any pair of adjacent battery cell assemblies, wherein... The two ends of the connecting busbar are connected to the external terminals included on each cell assembly, wherein, The protective cover covers the upper part of the connecting busbar.

7. The battery pack according to claim 6, wherein, The battery pack housing also includes: A busbar cover, the busbar cover being formed to correspond to the shape of the connecting busbar and covering the upper part of the connecting busbar, wherein, The protective cover covers the upper part of the manifold cover.

8. The battery pack according to claim 7, wherein, The battery pack housing also includes a sheath member located between the connecting busbar and the busbar cover, covering the upper part of the connecting busbar, wherein, The sheath component comprises an insulating material.

9. The battery pack according to claim 1, wherein, The base plate includes: Protrusions, which are spaced apart at predetermined intervals and protrude along the central portion of the battery pack housing, wherein... The protective cover is connected to and fixed to the protrusion.

10. The battery pack according to claim 9, wherein, The height of the upper end of the protrusion is at least higher than the height of the external terminal of the cell assembly.

11. The battery pack according to claim 9, wherein, The protective cover includes an insertion hole that opens corresponding to the position of the protrusion, wherein, The protective cover is attached to the base plate so that the protrusion is inserted into the insertion hole.

12. The battery pack according to claim 9, wherein, The protrusion includes a connecting groove at its upper end, wherein, The protective cover further includes a lower protrusion that protrudes downwards corresponding to the position of the protrusion, and the lower protrusion has a diameter that allows it to be inserted into the connecting groove. The protective cover is attached to the base plate by inserting the lower protrusion into the connecting groove.

13. The battery pack according to claim 1, wherein, The battery pack housing includes a central beam that extends across the central portion and connects to the base plate, wherein... The plurality of said cell assemblies are arranged symmetrically with respect to each other about the central beam and along the length of the battery pack housing, wherein, The protective cover is connected to the upper end of the central beam.

14. The battery pack according to claim 1, wherein, The battery cell assembly includes: A battery cell stack, wherein multiple battery cells are stacked in the battery cell stack, and electrode leads are led out from the multiple battery cells; and End plates, the end plates being connected to the front and rear surfaces of the cell stack, wherein, The external terminal is formed on the end plate at a position corresponding to the electrode lead, for electrical connection with the electrode lead.

15. The battery pack according to claim 14, wherein, The cell assembly also includes a module frame that surrounds the periphery of the cell stack and is connected to the end plate.

16. The battery pack according to claim 15, wherein, The module framework includes: The lower frame supports the lower part of the battery cell stack; Upper frame, the upper frame supporting the upper part of the cell stack; and, A pair of side frames, which support both sides of the cell stack, wherein, The upper frame includes multiple openings.

Images