Battery module

Abstract

A battery module of the disclosure includes a plurality of battery cells stacked in a first direction, a first busbar located at one side of the plurality of battery cells to be electrically connected with the plurality of battery cells, a first busbar frame disposed between the first busbar and the plurality of battery cells and supporting the first busbar, a first hole passing through the first busbar, and a first protrusion protruding from the first busbar frame, inserted into the first hole, and melted at a preset temperature.

Description

Technical Field

[0001] This disclosure relates to a battery module. Specifically, it relates to a battery module for preventing thermal propagation (TP) during thermal runaway of the battery cell. Background Technology

[0002] In recent years, public concerns about battery safety have been growing due to fires and explosions that have occurred while using lithium-ion batteries. Based on these concerns, one of the main development challenges for lithium-ion batteries recently has been eliminating safety hazards such as fires and explosions caused by thermal runaway within the battery cell.

[0003] In particular, when flames, high-temperature gases, and conductive particles ejected from the battery cells are discharged in any direction, they may directly ignite other battery cells or modules, or cause short circuits between components of the battery pack, thereby further exacerbating this thermal runaway situation. To prevent this, battery devices comprising multiple cells require a structure to guide the flames or gases to flow or discharge in a safe direction. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] First, according to one aspect of this disclosure, an improved battery module is intended to be provided.

[0006] Second, according to another aspect of this disclosure, an aim is to provide a battery module that extends battery life.

[0007] Third, according to another aspect of this disclosure, this disclosure aims to provide a battery module capable of discharging off-gas while supporting the busbar.

[0008] On the other hand, this disclosure can be widely applied to the fields of electric vehicles, battery charging stations, energy storage systems (ESS), and other green technologies that utilize batteries, such as solar power and wind power.

[0009] In addition, this disclosure can be used for environmentally friendly mobility, including electric vehicles and hybrid vehicles, to prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0010] (II) Technical Solution

[0011] To address the aforementioned issues, the battery module disclosed herein includes: a plurality of battery cells stacked along a first direction; a first busbar located on one side of the plurality of battery cells for electrical connection with the plurality of battery cells; a first busbar frame disposed between the first busbar and the plurality of battery cells and supporting the first busbar; a first hole penetrating the first busbar; and a first protrusion protruding from the first busbar frame, inserted into the first hole, and melted at a preset temperature.

[0012] The battery module may further include: a plurality of electrode tabs protruding from the plurality of cells along a second direction perpendicular to the first direction; and a plurality of insertion holes penetrating the first busbar, wherein the plurality of electrode tabs are inserted into the plurality of insertion holes.

[0013] The first hole can be disposed among the plurality of insertion holes.

[0014] In a second direction perpendicular to the first direction, the first busbar frame can be disposed between the first busbar and the plurality of battery cells, and the first hole can extend along a third direction perpendicular to the first direction and the second direction.

[0015] The first hole may be provided in at least one form.

[0016] The first protrusion may protrude outward from the first busbar.

[0017] The first busbar may include a terminal portion that is electrically connected to an external circuit.

[0018] The first busbar may further include a first sub-busbar and a second sub-busbar disposed along the first direction. Multiple first holes may be provided, and the multiple first holes respectively penetrate the terminal portion, the first sub-busbar and the second sub-busbar.

[0019] The shape and area of ​​multiple first holes can be the same.

[0020] The area of ​​at least a portion of the first holes may be different.

[0021] When the first protrusion melts at the preset temperature, the first busbar frame can be exposed through the first hole.

[0022] The first busbar and the first busbar frame can contact each other.

[0023] The battery module may further include: a cover housing facing at least a portion of the first busbar, the first busbar frame, and at least one of the plurality of battery cells; and an exhaust port penetrating the cover housing.

[0024] In a second direction perpendicular to the first direction, the first busbar frame may be disposed between the first busbar and the plurality of battery cells. The cover housing may include: a side portion facing the first busbar in the second direction; and an upper portion facing the plurality of battery cells in a third direction perpendicular to the first and second directions. The vent hole may penetrate at least one of the side portion and the upper portion.

[0025] The battery module may further include: a second busbar located on the other side of the plurality of battery cells for electrical connection with the plurality of battery cells; and a second busbar frame disposed between the second busbar and the plurality of battery cells and supporting the second busbar.

[0026] The battery module may further include: a second hole penetrating the second busbar; and a second protrusion protruding from the second busbar frame, inserted into the second hole, and melted at a preset temperature.

[0027] Gas discharged from at least one of the plurality of battery cells can flow out through the first hole.

[0028] The battery module disclosed herein includes: a plurality of battery cells stacked along a first direction; electrode tabs protruding from the plurality of battery cells along a second direction perpendicular to the first direction; a first busbar including an insertion hole into which the electrode tabs are inserted; a first busbar frame disposed between the first busbar and the plurality of battery cells and supporting the first busbar in the second direction; and a first hole penetrating the first busbar and extending along a third direction perpendicular to both the first and second directions, wherein the length of the first hole may be less than the length of the insertion hole in the third direction.

[0029] In the first direction, the width of the first hole can be greater than the width of the insertion hole.

[0030] The battery module may further include: a protrusion that protrudes from the first busbar frame, is inserted into the first hole, and is melted at a preset temperature.

[0031] (III) Beneficial Effects

[0032] First, according to one embodiment of this disclosure, flames or gases can be vented in a safe direction, thereby improving the stability of the battery module.

[0033] Second, according to one embodiment of this disclosure, flames or gases can be vented in a safe direction, thereby improving battery life.

[0034] Third, according to one embodiment of this disclosure, exhaust gas can be discharged while supporting the manifold. Attached Figure Description

[0035] Figure 1 This is a perspective view showing a battery module according to an embodiment of the present disclosure.

[0036] Figure 2 It is shown Figure 1 An exploded view of the battery module.

[0037] Figure 3 It is shown Figure 2 A diagram of the first busbar component.

[0038] Figure 4 yes Figure 3 An exploded view of the first busbar component.

[0039] Figure 5 and Figure 6 This is a diagram illustrating a first busbar assembly according to an embodiment of the present disclosure.

[0040] Figure 7 This is a diagram illustrating a first busbar assembly according to another embodiment of the present disclosure.

[0041] Figure 8 This is a diagram illustrating a first busbar assembly according to yet another embodiment of the present disclosure.

[0042] Figure 9 This is a diagram illustrating a first busbar assembly according to an embodiment of the present disclosure. Detailed Implementation

[0043] The present disclosure will now be described in detail with reference to the accompanying drawings. However, these are merely examples, and the present disclosure is not limited to the specific embodiments described herein.

[0044] The specific terminology used in this specification is for illustrative purposes only and is not intended to limit the embodiments shown.

[0045] For example, expressions such as "same" and "identical" not only indicate a state of strict sameness, but also indicate a state of difference in tolerance or degree of achieving the same functionality.

[0046] For example, expressions such as "any direction", "along any direction", "parallel", "perpendicular", "centered", "concentric" or "coaxial" indicate relative or absolute arrangement. They not only indicate an arrangement that is strictly so, but also indicate a state of relative displacement with tolerances or to achieve the same degree of functionality at angles or distances.

[0047] To illustrate this disclosure, the following explanation is based on an orthogonal spatial coordinate system in which the X, Y, and Z axes are orthogonal to each other. Each axis (X-axis direction, Y-axis direction, Z-axis direction) represents the two directions extending from each axis.

[0048] The X, Y, and Z directions described below are for illustrative purposes to provide a clearer understanding of this disclosure. Of course, each direction may be defined differently depending on the reference datum.

[0049] The use of terms such as "first," "second," and "third" before the components described below is solely to avoid confusion and is unrelated to the order, importance, or hierarchical relationship between the components. For example, it is also possible to implement an invention that includes only the second component without the first component.

[0050] Unless the context clearly indicates otherwise, singular expressions as used in this specification include plural expressions.

[0051] Figure 1 This is a perspective view showing a battery module according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 An exploded view of the battery module.

[0052] Reference Figure 1 and Figure 2 According to one embodiment of the present disclosure, the battery module 1 may include a plurality of battery cells 100, a base plate 200, a cover shell 300, side plates 400a and 400b, a first busbar assembly 500 and a second busbar assembly 600.

[0053] Multiple battery cells 100 may each include an electrode assembly and an outer casing. The outer casing can house the electrode assembly. The multiple battery cells 100 may include electrode tabs 120a and 120b. Electrode tabs 120a and 120b may protrude from the multiple battery cells 100. For example, in the second direction Y, electrode tabs 120a and 120b may protrude from the multiple battery cells 100. Electrode tabs 120a and 120b can be electrically connected to the electrodes of the electrode assembly. Electrode tabs 120a and 120b may be exposed outside the outer casing. Figure 2The diagram shows electrode tabs 120a and 120b protruding along a second direction Y, but the embodiments are not limited thereto. For example, electrode tabs 120a and 120b can protrude from multiple battery cells 100 along a first direction X. Or, for example, electrode tabs 120a and 120b can protrude from multiple battery cells 100 along a third direction Z.

[0054] Electrode tabs 120a and 120b may include a first electrode tab 120a and a second electrode tab 120b. The first electrode tab 120a may be electrically connected to one of the positive or negative terminals of the electrode assembly, and the second electrode tab 120b may be electrically connected to the other of the positive or negative terminals.

[0055] Multiple battery cells 100 can be stacked along a first direction X. The multiple battery cells 100 can be arranged at predetermined intervals along the first direction X. The multiple battery cells 100 can output or store electrical energy. In one embodiment, at least a portion between the multiple battery cells 100 can be provided with a heat-insulating material. For example, the heat-insulating material provided between the battery cells of the multiple battery cells 100 may include materials with excellent heat resistance and heat insulation properties, such as mica, ceramic wool, or polyurethane.

[0056] The base plate 200, the cover housing 300, and the side plates 400a and 400b can be combined with each other to form an internal space for accommodating multiple battery cells 100. The base plate 200, the cover housing 300, and the side plates 400a and 400b can protect the multiple battery cells 100 housed in the internal space from external impacts or foreign objects. The materials of the base plate 200, the cover housing 300, and the side plates 400a and 400b can each include any one of aluminum, iron, and polymer.

[0057] The base plate 200 may face at least a portion of the plurality of battery cells 100. For example, the base plate 200 may overlap with a portion of the plurality of battery cells 100 in the third direction Z. The base plate 200 may be disposed at the lower part of the plurality of battery cells 100. The base plate 200 may overlap with the lower surface of the plurality of battery cells 100 in the third direction Z. The base plate 200 may support the plurality of battery cells 100.

[0058] The base plate 200 may have high thermal conductivity. For example, the base plate 200 may include a thermally conductive component between itself and the plurality of battery cells 100. The thermally conductive component may have adhesive strength and thermal conductivity greater than or equal to a reference value. For example, the reference value may be 0.8 W / mK, and the material of the thermally conductive component may be a thermally conductive polymer, such as epoxy resin or polyurethane-based material.

[0059] The cover housing 300 may face at least one of the plurality of battery cells 100, the first busbar assembly 500, and the second busbar assembly 600. For example, the cover housing 300 may face the plurality of battery cells 100. Or, for example, the cover housing 300 may face the plurality of battery cells 100, the first busbar assembly 500, and the second busbar assembly 600.

[0060] The cover housing 300 may face at least a portion of at least one of the plurality of battery cells 100, the first busbar assembly 500, and the second busbar assembly 600. For example, the cover housing 300 may face at least a portion of the first busbar assembly 500. Or, for example, the cover housing 300 may face at least a portion of each of the plurality of battery cells 100, the first busbar assembly 500, and the second busbar assembly 600.

[0061] The cover housing 300 may face at least a portion of the plurality of battery cells 100. For example, the cover housing 300 may overlap with at least a portion of the plurality of battery cells 100 in a third direction Z. The cover housing 300 may face at least a portion of the first busbar assembly 500 and the second busbar assembly 600. For example, the cover housing 300 may overlap with at least a portion of the first busbar assembly 500 and the second busbar assembly 600 in a second direction Y. The cover housing 300 may cover at least a portion of each of the plurality of battery cells 100, the first busbar assembly 500, and the second busbar assembly 600. For example, the cover housing 300 may cover the upper surface of the plurality of battery cells 100. The cover housing 300 may cover the outer surfaces of the first busbar assembly 500 and the second busbar assembly 600.

[0062] The housing 300 may include a top portion 310, a side portion 320, and a vent 330. The top portion 310 may include a surface facing the plurality of battery cells 100. The top portion 310 may be connected to the side portion 320. The side portions 320 may be spaced apart from each other across the top portion 310. The side portions 320 may include surfaces facing the first busbar assembly 500 and the second busbar assembly 600, respectively.

[0063] The upper portion 310 may face the upper surfaces of the plurality of battery cells 100. The upper portion 310 may overlap with the upper surfaces of the plurality of battery cells 100 in the third direction Z. The upper portion 310 may be arranged parallel to the base plate 200 in the third direction Z. The upper portion 310 may cover at least a portion of the upper surfaces of the plurality of battery cells 100. The side portions 320 may be arranged parallel to each other in the second direction Y. The side portions 320 may face the first busbar assembly 500 and the second busbar assembly 600. The side portions 320 may overlap with the first busbar assembly 500 and the second busbar assembly 600 in the second direction Y. The side portions 320 may cover at least a portion of the outer surfaces of the first busbar assembly 500 and the second busbar assembly 600.

[0064] The vent 330 may extend through at least one of the upper portion 310 and the side portion 320. The plurality of vents 330 may be spaced apart from each other at predetermined intervals and extend through the upper portion 310 and the side portion 320.

[0065] exist Figure 1 and Figure 2 The diagram shows an exhaust port 330 extending through both the upper portion 310 and the side portion 320, but the embodiment is not limited to this. For example, the exhaust port 330 may extend through the upper portion 310 but not through the lower portion 320. Alternatively, the exhaust port 330 may extend through the lower portion 320 but not through the upper portion 310. Through the exhaust port 330, gases and other gases generated in the internal space formed by the combination of the base plate 200, the cover shell 300, and the side plates 400a and 400b can be discharged to the outside.

[0066] Side plates 400a and 400b may include a first side plate 400a and a second side plate 400b. The first side plate 400a and the second side plate 400b may be disposed at intervals between multiple battery cells 100 along a first direction X. For example, the first side plate 400a may be located in front of the multiple battery cells 100, and the second side plate 400b may be located behind the multiple battery cells 100.

[0067] The first busbar assembly 500 and the second busbar assembly 600 can be electrically connected to a plurality of battery cells 100. The first busbar assembly 500 can be electrically connected to the first electrode tab 120a of the plurality of battery cells 100. The second busbar assembly 600 can be electrically connected to the second electrode tab 120b. The first busbar assembly 500 and the second busbar assembly 600 can be disposed between the side portion 320 of the cover housing 300 and the plurality of battery cells 100. For example, in the second direction Y, one side of the first busbar assembly 500 can face the side portion 320 of the cover housing 300, and the other side can face the plurality of battery cells 100. Similarly, in the second direction Y, one side of the second busbar assembly 600 can face the side portion 320 of the cover housing 300, and the other side can face the plurality of battery cells 100.

[0068] Since the description of the second busbar assembly 600 is actually the same as that of the first busbar assembly 500, the following description will focus on the first busbar assembly 500.

[0069] Figure 3 It is shown Figure 2 A diagram of the first busbar component. Figure 4 yes Figure 3 An exploded view of the first busbar component. Figure 5 and Figure 6 This is a diagram illustrating a first busbar assembly according to an embodiment of the present disclosure.

[0070] Reference Figure 3The first busbar assembly 500 may include a first busbar 510 and a first busbar frame 520. The first busbar 510 and the first busbar frame 520 are in contact with each other. As described above, the battery module 1 may further include: a second busbar located on the other side of the plurality of battery cells 100 for electrical connection with the plurality of battery cells 100; and a second busbar frame 600 disposed between the second busbar and the plurality of battery cells 100 and supporting the second busbar.

[0071] Reference Figure 4 The first busbar 510 may include a first sub-busbar 511, a second sub-busbar 512, a terminal portion 513, an insertion hole 514, and a first hole 515. The first sub-busbar 511 and the second sub-busbar 512 may be arranged along a first direction X. Furthermore, similar to the first busbar 510, the second busbar may further include: a second hole penetrating the second busbar; and a second protrusion protruding from the second busbar frame, inserted into the second hole, and melted at a preset temperature.

[0072] For example, the first sub-busbar 511 and the second sub-busbar 512 may have a plate shape. The first sub-busbar 511 and the second sub-busbar 512 may contain conductive material. The first sub-busbar 511 and the second sub-busbar 512 may electrically connect to multiple battery cells 100. The first sub-busbar 511 and the second sub-busbar 512 may be combined with a first busbar frame 520. At least a portion of the first sub-busbar 511 and the second sub-busbar 512 may be provided with a terminal portion 513 capable of being electrically connected to the external circuitry of the battery module 1. That is, a portion of the first sub-busbar 511 and the second sub-busbar 512 electrically connected to the external circuitry may be a terminal portion 513.

[0073] exist Figure 4 The diagram shows a first busbar 510 that includes a terminal portion 513, a first sub-busbar 511, and a second sub-busbar 512, but the embodiment is not limited to this. For example, the first busbar 510 may only include the terminal portion 513, without including the first sub-busbar 511 and the second sub-busbar 512.

[0074] Insertion hole 514 can pass through the first sub-busbar 511 and the second sub-busbar 512. For example, insertion hole 514 can extend in a third direction Z. First electrode tabs 120a of the plurality of battery cells 100 can be inserted into insertion hole 514. First electrode tabs 120a can be inserted into insertion hole 514 so that the plurality of battery cells 100 are electrically connected to the first sub-busbar 511 and the second sub-busbar 512.

[0075] At least one first hole 515 may be provided. Specifically, multiple first holes 515 may be provided. The first hole 515 may pass through the first sub-busbar 511 and the second sub-busbar 512. The first hole 515 may be provided between insertion holes 514. For example, the first hole 515 may be provided between insertion holes 514 arranged parallel to a first direction X. The first hole 515 may extend along a third direction Z.

[0076] The first hole 515 may include a first sub-hole 515a and a second sub-hole 515b. The first sub-hole 515a may pass through the first sub-busbar 511. The second sub-hole 515b may pass through the second sub-busbar 512.

[0077] The first sub-hole 515a and the second sub-hole 515b can be individually disposed on the first sub-busbar 511 and the second sub-busbar 512, respectively. In one embodiment, the first sub-hole 515a and the second sub-hole 515b can have the same shape and area. That is, the shapes of the first sub-hole 515a and the second sub-hole 515b can be identical.

[0078] Reference Figure 5 The first hole 515 may have a first width W515 in the first direction X. The insertion hole 514 may have a second width W514 in the first direction X. The first width W515 of the first hole 515 may be greater than the second width W514 of the insertion hole 514. However, the embodiment is not limited to this. For example, the first width W515 of the first hole 515 may be smaller than the second width W514 of the insertion hole 514. Or, for example, the first width W515 of the first hole 515 may be the same as the second width W514 of the insertion hole 514.

[0079] Refer again Figure 4 The first busbar frame 520 may include a protrusion 523, a through-hole 524, and a first protrusion 525. The first busbar frame 520 may be disposed along a second direction Y between the first busbar 510 and the plurality of battery cells 100. The first busbar frame 520 may support the first busbar 510, enabling a stable connection between the first busbar 510 and the plurality of battery cells 100. The first busbar frame 520 may be combined with a first sub-busbar 511 and a second sub-busbar 512. The first busbar frame 520 may contain a rigid, non-conductive material. For example, the first busbar frame 520 may contain plastic. More specifically, the first busbar frame 520 may be formed of engineering plastic.

[0080] The protrusion 523 may protrude into multiple battery cells 100. For example, the protrusion 523 may be integrally formed with the first busbar frame 520. Alternatively, the protrusion 523 may be configured as a component independent of the first busbar frame 520, but integrated with the first busbar frame 520. Multiple protrusions 523 may be arranged along a first direction X.

[0081] The through-hole 524 can penetrate the first busbar frame 520. For example, the through-hole 524 can extend along a third direction Z. The first electrode tabs 120a of the plurality of cells 100 can pass through the through-hole 524. The through-hole 524 can correspond to the insertion hole 514. The first electrode tabs 120a can pass through the through-hole 524 and be inserted into the insertion hole 514. The through-hole 524 and the protrusion 523 can be alternately arranged along a first direction X.

[0082] A first protrusion 525 may protrude from the first busbar frame 520. The first protrusion 525 may protrude from the first busbar frame 520 toward the first busbar 510. The first protrusion 525 may correspond to a first hole 515. The first protrusion 525 may be inserted into the first hole 515. For example, the first protrusion 525 may extend along a third direction Z. Multiple first protrusions 525 may be spaced apart in a first direction X. For example, the first protrusion 525 may be integrally formed with the first busbar frame 520. Alternatively, the first protrusion 525 may be configured as a component independent of the first busbar frame 520, but integrated into the first busbar frame 520.

[0083] The first protrusion 525 may include a first sub-protrusion 525a and a second sub-protrusion 525b. The first sub-protrusion 525a and the second sub-protrusion 525b may correspond to the first sub-hole 515a and the second sub-hole 515b, respectively. The first sub-protrusion 525a and the second sub-protrusion 525b may be inserted into the first sub-hole 515a and the second sub-hole 515b, respectively.

[0084] Reference Figure 6 The first protrusion 525 may protrude outward from the first busbar 510. Specifically, with the first protrusion 525 inserted into the first hole 515, the first protrusion 525 may protrude further than the surface of the first busbar 510 that does not face the first busbar frame 520. However, the embodiment is not limited to this. For example, the first protrusion 525 may not protrude further than the surface of the first busbar 510 that does not face the first busbar frame 520. For example, the outer surface of the first protrusion 525 and the surface of the first busbar 510 that does not face the first busbar frame 520 may be on the same plane.

[0085] The first protrusion 525 can melt at a preset temperature. The melting point of the first protrusion 525 can be lower than that of the first busbar 510.

[0086] Figure 7 This is a diagram illustrating a first busbar assembly according to another embodiment of the present disclosure. For ease of explanation, the description is mainly based on references to... Figures 3 to 6 The parts of the description are different.

[0087] Reference Figure 7 The first sub-hole 515a and the second sub-hole 515b can each be provided with different numbers. The second sub-hole 515b does not necessarily have to be provided individually on the second sub-busbar 512. For example, one first sub-hole 515a can pass through the first sub-busbar 511, and multiple second sub-holes 515b can pass through the second sub-busbar 512. Multiple second sub-holes 515b can be provided between the insertion holes 514. Multiple second sub-holes 515b can be positioned relative to each other along a third direction Z.

[0088] The first sub-protrusion 525a and the second sub-protrusion 525b can also be provided in different quantities. The second sub-protrusion 525b may not be provided in a single form on the first busbar frame 520. For example, one first sub-protrusion 525a may protrude from the first busbar frame 520, and multiple second sub-protrusions 525b may protrude from the first busbar frame 520. The multiple second sub-protrusions 525b may be arranged along a third direction Z.

[0089] In one embodiment, the shape and area of ​​the first sub-hole 515a and the second sub-hole 515b may be different. For example, the area of ​​the second sub-hole 515b may be smaller than that of the first sub-hole 515a. The length of the second sub-hole 515b extending along a third direction Z may be less than that of the first sub-hole 515a. The widths of the first sub-hole 515a and the second sub-hole 515b in the first direction X may be the same.

[0090] Figure 8 This is a diagram illustrating a first busbar assembly according to yet another embodiment of the present disclosure. For ease of explanation, the description is primarily based on references to... Figures 3 to 7 The parts of the description are different.

[0091] Reference Figure 8 Multiple second sub-holes 515b can be disposed between the insertion holes 514. Multiple second sub-holes 515b can be disposed relative to each other along a first direction X. Multiple second sub-protrusions 525b can be disposed relative to each other along the first direction X.

[0092] In one embodiment, the areas of the first sub-hole 515a and the second sub-hole 515b may be different. For example, the area of ​​the second sub-hole 515b may be smaller than that of the first sub-hole 515a. The width of the second sub-hole 515b in the first direction X may be smaller than that of the first sub-hole 515a. The lengths of the first sub-hole 515a and the second sub-hole 515b extending in the third direction Z may be the same.

[0093] exist Figure 7 and Figure 8 The diagram shows one first sub-hole 515a and two second sub-holes 515b, but the embodiment is not limited to this. For example, two first sub-holes 515a can penetrate the first sub-busbar 511, and three second sub-holes 515b can penetrate the second sub-busbar 512.

[0094] By adjusting the shape and number of the first sub-holes 515a and 515b, and their corresponding first sub-protrusions 525a and 525b, provided on the first manifold 510, the gas flow can be adjusted according to their position. For example, by reducing the area of ​​the first sub-holes 515a, 515b, 525a, and 525b, control can be achieved to rapidly melt the first sub-protrusions 525a and 525b when the temperature rises, thereby quickly realizing gas flow. Alternatively, by increasing the area of ​​the first sub-holes 515a, 515b, 525a, and 525b, control can be achieved to ensure smooth gas flow at locations where more gas is generated, even when the first sub-protrusions 525a and 525b melt when the temperature rises.

[0095] Figure 9 This is a diagram illustrating a first busbar assembly according to an embodiment of the present disclosure. For reference, Figure 9 This shows the first protrusion 525 caused by the increase in temperature. Figure 6 A diagram of the first busbar assembly 500 in its molten state. For ease of explanation, the main descriptions and references are provided. Figure 5 and Figure 6 The parts of the description are different.

[0096] and Figure 6 In comparison, reference Figure 9 During the operation of battery module 1, the first protrusion 525 can melt when the temperature rises and reaches a preset temperature. Since the first protrusion 525 protrudes outward from the first busbar 510, it can melt easily. If the first protrusion 525 melts, the first hole 515 can be exposed. Specifically, the first protrusion 525 filling the first hole 515 melts and is removed, thereby exposing the inner wall of the first hole 515.

[0097] The first protrusion 525 melts, and at least a portion of the first manifold frame 520 exposed through the first hole 515 can melt due to heat. Because the heat is concentrated on the protrusion, the temperature of the protrusion can rise relatively faster than other parts.

[0098] Therefore, gas can flow out to the outside of the battery module 1 through the first hole 515. For example, if thermal runaway occurs in any of the multiple cells 100, the outer casing of the cell experiencing thermal runaway can be torn and opened. With the opening of the outer casing, high-temperature gas (exhaust gas) may leak from the multiple cells 100. At this time, the high-temperature gas or heat can be discharged to the outside through the first hole 515, which is formed by melting at least a portion of the first protrusion 525 and the first busbar frame 520.

[0099] This disclosure can be implemented in various forms, and its scope of rights is not limited to the embodiments described above. Therefore, if a modified embodiment includes components of this disclosure, it should be considered to fall within the scope of this disclosure.

Claims

1. A battery module, comprising: Multiple battery cells are stacked along the first direction; The first busbar is located on one side of the plurality of battery cells and is electrically connected to the plurality of battery cells; A first busbar frame is disposed between the first busbar and the plurality of battery cells, and supports the first busbar; The first hole penetrates the first busbar; as well as The first protrusion protrudes from the first busbar frame, inserts into the first hole, and melts at a preset temperature.

2. The battery module according to claim 1, further comprising: Multiple electrode tabs protrude from the multiple battery cells along a second direction perpendicular to the first direction; as well as Multiple insertion holes extend through the first busbar, and the multiple electrode tabs are inserted into the multiple insertion holes.

3. The battery module according to claim 2, wherein, The first hole is disposed between the plurality of insertion holes.

4. The battery module according to claim 1, wherein, In a second direction perpendicular to the first direction, the first busbar frame is disposed between the first busbar and the plurality of battery cells. The first hole extends along a third direction perpendicular to the first direction and the second direction.

5. The battery module according to claim 1, wherein, The first hole is provided with at least one.

6. The battery module according to claim 1, wherein, The first protrusion protrudes outward from the first busbar.

7. The battery module according to claim 1, wherein, The first busbar includes a terminal portion that is electrically connected to an external circuit.

8. The battery module according to claim 7, wherein, The first busbar further includes a first sub-busbar and a second sub-busbar disposed along the first direction. The first hole is provided in multiple ways, and the multiple first holes respectively penetrate the terminal part, the first sub-busbar and the second sub-busbar.

9. The battery module according to claim 8, wherein, The multiple first holes have the same shape and area.

10. The battery module according to claim 8, wherein, At least a portion of the first holes have different areas.

11. The battery module according to claim 1, wherein, When the first protrusion melts at the preset temperature, the first busbar frame is exposed through the first hole.

12. The battery module according to claim 1, wherein, The first busbar and the first busbar frame are in contact with each other.

13. The battery module according to claim 1, further comprising: The cover housing faces at least a portion of the first busbar, the first busbar frame, and at least one of the plurality of battery cells; as well as An exhaust vent extends through the cover housing.

14. The battery module according to claim 13, wherein, In a second direction perpendicular to the first direction, the first busbar frame is disposed between the first busbar and the plurality of battery cells. The cover housing includes: The side portion faces the first busbar in the second direction; and The upper part faces the plurality of battery cells on a third direction perpendicular to the first and second directions. The vent hole extends through at least one of the side portion and the top portion.

15. The battery module according to claim 1, further comprising: The second busbar is located on the other side of the plurality of battery cells and is electrically connected to the plurality of battery cells; as well as The second busbar frame is disposed between the second busbar and the plurality of battery cells, and supports the second busbar.

16. The battery module according to claim 15, further comprising: The second hole penetrates the second busbar; as well as The second protrusion extends from the second busbar frame, inserts into the second hole, and melts at a preset temperature.

17. The battery module according to claim 1, wherein, Gas discharged from at least one of the plurality of battery cells flows out through the first hole.

18. A battery module, comprising: Multiple battery cells are stacked along the first direction; Electrode tabs protrude from the plurality of cells along a second direction perpendicular to the first direction; The first busbar includes an insertion hole, into which the electrode tab is inserted; In the second direction, the first busbar frame is disposed between the first busbar and the plurality of battery cells, and supports the first busbar; as well as The first hole penetrates the first busbar and extends along a third direction perpendicular to the first direction and the second direction. In the third direction, the length of the first hole is less than the length of the insertion hole.

19. The battery module according to claim 18, wherein, In the first direction, the width of the first hole is greater than the width of the insertion hole.

20. The battery module according to claim 18, further comprising: The protrusion extends from the first busbar frame, inserts into the first hole, and melts at a preset temperature.

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