Battery module, battery pack, and vehicle

Abstract

Disclosed is a battery module that improves the welding reliability between electrode leads and bus bars and reduces production costs. To achieve the object, a battery module according to the present invention includes: a plurality of battery cells each including an electrode lead; a bus bar including a lead engaging portion configured to engage with the electrode lead provided at each of the plurality of battery cells; and a bus bar frame including: an insertion space formed therein into which at least a portion of the bus bar is inserted; and a jig support portion configured to support a welding jig configured to press the electrode lead in a direction opposite to a pressing direction of the welding jig.

Description

Technical Field

[0001] This disclosure relates to battery modules, battery packs, and vehicles, and more specifically, to battery modules that improve the reliability of the weld between electrode leads and busbars and reduce manufacturing costs, as well as battery packs and vehicles including the battery module.

[0002] This application claims priority to Korean Patent Application No. 10-2021-0019348, filed in Korea on February 10, 2021, the disclosure of which is incorporated herein by reference. Background Technology

[0003] In recent years, with the rapid growth in demand for portable electronic products such as laptops, cameras and mobile phones, the development of electric vehicles, energy storage batteries, robots, satellites and other technologies has also been in full swing, and research on high-performance rechargeable batteries that can be repeatedly charged and discharged is being actively carried out.

[0004] Currently, commercially available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries have attracted much attention due to their near-absence of memory effect compared to nickel-based batteries, resulting in advantages such as free charge / discharge capability, extremely low self-discharge rate, and high energy density.

[0005] Lithium-ion secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative electrode active materials, respectively. Furthermore, a lithium-ion secondary battery includes: an electrode assembly, in which positive and negative electrode plates, respectively coated with positive and negative electrode active materials, are disposed, with a separator located between them; and a casing, i.e., a battery housing, for sealing and containing the electrode assembly and the electrolyte solution together.

[0006] Based on the shape of the casing, lithium secondary batteries can be divided into hard-case secondary batteries in which the electrode components are housed in a metal can, and soft-pack secondary batteries in which the electrode components are housed in a pouch made of aluminum laminate.

[0007] In a conventional battery module, busbars are used to electrically connect stacked battery cells, and multiple electrode leads from multiple battery cells are bent, placed on the busbars, and then soldered.

[0008] When manufacturing a conventional battery module as described above, with the bent electrode leads placed on the busbar, the electrode leads are pressed toward the busbar using a welding jig to make close contact with the busbar, and then welded by firing a laser at the electrode leads.

[0009] Furthermore, in existing technologies, the welding fixture is supported only by the busbar, and there are instances where the busbar cannot be stably fixed to the busbar frame. Therefore, in existing technologies, while the busbar supports the welding fixture, it is likely to move due to the pressure exerted by the welding fixture, or its position may change. Consequently, a tight connection between the electrode lead and the busbar cannot be maintained, leading to reduced welding reliability between the electrode lead and the busbar.

[0010] Furthermore, to withstand the pressure of the welding fixture, the busbar needs to have a certain thickness sufficient to provide adequate mechanical rigidity. Therefore, there are significant limitations in the existing technology regarding reducing the thickness of the busbar. Summary of the Invention

[0011] Technical issues

[0012] This disclosure is designed to address problems in the prior art, and therefore aims to provide a battery module that improves the welding reliability of the weld between the electrode leads and the busbar and reduces manufacturing costs, as well as a battery pack and a vehicle including the battery module.

[0013] The above and other objects and advantages of this disclosure may be understood from the following detailed description and will become more apparent from the exemplary embodiments of this disclosure. Furthermore, it will be readily understood that the objects and advantages of this disclosure may be achieved by the appended claims and combinations thereof.

[0014] Technical solution

[0015] One aspect of this disclosure provides a battery module comprising: a plurality of battery cells, each of the plurality of battery cells including an electrode lead; a busbar including a lead welding portion engaging with the electrode lead of each of the plurality of battery cells; and a busbar frame including an insertion space and a clamp support portion, at least a portion of the busbar being inserted into the insertion space, the clamp support portion being configured to support a welding clamp in a direction opposite to the pressing direction of a welding clamp configured to press the electrode lead.

[0016] In addition, the busbar may also include a clamp extension for supporting the welding fixture in a direction opposite to the pressing direction of the welding fixture.

[0017] In addition, the busbar may also include a frame insertion part, which includes an internal space, into which a clamp support part is inserted.

[0018] In addition, a portion of the busbar can protrude outward as a protrusion, and a through slit can be formed in the protrusion of the busbar, through which the end of the electrode lead passes.

[0019] In addition, a portion of the busbar can protrude outward as a protrusion, and an insertion groove can be formed in the protrusion of the busbar, into which the end of the electrode lead is inserted.

[0020] In addition, the clamp support can be a protruding part that contacts the electrode leads.

[0021] In addition, a portion of the clamp support can protrude outward, and a fixing slit can be formed in the protrusion of the clamp support, through which the end of the electrode lead passes.

[0022] In addition, a portion of the clamp support can protrude outward as a protrusion, and a fixing groove can be formed in the protrusion of the clamp support, into which the end of the electrode lead is inserted.

[0023] Another aspect of this disclosure provides a battery pack including at least one battery module as described above.

[0024] Another aspect of this disclosure provides a vehicle including at least one battery module as described above.

[0025] Beneficial effects

[0026] According to one aspect of this disclosure, since the battery module includes a busbar frame, which includes an insertion space for inserting at least a portion of the busbar and a clamping support for supporting a welding fixture, the electrode leads and the lead welding portion of the busbar can be stably kept in close contact. That is, since the busbar frame can stably restrict the movement of the busbar by accommodating a portion of the busbar, and the pressing force of the welding fixture can be effectively controlled by using the clamping support, movement of the busbar or deformation due to the pressing force of the welding fixture can be prevented. Therefore, the welding reliability between the electrode leads and the busbar can be effectively improved. Attached Figure Description

[0027] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, are intended to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure should not be construed as limited to the drawings.

[0028] Figure 1 This is a perspective view showing a battery module according to Embodiment 1 of the present disclosure.

[0029] Figure 2 It is shown Figure 1 A perspective view of the battery module and welding fixture.

[0030] Figure 3 This is an exploded perspective view showing the components of a battery module according to Embodiment 1 of the present disclosure.

[0031] Figure 4 This is a rear perspective view showing the busbar of a battery module according to Embodiment 1 of the present disclosure.

[0032] Figure 5 It is shown Figure 1 A partial horizontal cross-sectional view of the battery module taken along line CC′.

[0033] Figure 6 This is a perspective view showing the busbar of a battery module according to Embodiment 2 of the present disclosure.

[0034] Figure 7 This is a partial horizontal cross-sectional view showing a battery module according to Embodiment 2 of the present disclosure.

[0035] Figure 8 This is a partial horizontal cross-sectional view showing a battery module according to Embodiment 3 of the present disclosure.

[0036] Figure 9 This is a perspective view showing the busbar and busbar frame of a battery module according to Embodiment 4 of the present disclosure.

[0037] Figure 10 This is a horizontal cross-sectional view showing a battery module according to Embodiment 4 of the present disclosure.

[0038] Figure 11 This is a partial perspective view of the busbar and busbar frame of a battery module according to Embodiment 5 of this disclosure.

[0039] Figure 12 This is a partial horizontal cross-sectional view showing a battery module according to Embodiment 5 of the present disclosure.

[0040] Figure 13 This is a partial horizontal cross-sectional view showing a battery module according to Embodiment 6 of the present disclosure.

[0041] Figure 14 This is a side view showing the appearance of a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0042] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general or dictionary meaning, but rather as understood based on the meaning and concepts corresponding to the technical aspects of the present disclosure, in accordance with the principle that the inventors are allowed to appropriately define the terms to obtain the best interpretation.

[0043] Therefore, the description presented herein is merely a preferred example for illustrative purposes only and is not intended to limit the scope of this disclosure. It should be understood that other equivalents and modifications may be made without departing from the scope of this disclosure.

[0044] Figure 1 This is a perspective view showing a battery module according to Embodiment 1 of the present disclosure. Figure 2 It is shown Figure 1 A perspective view of the battery module and welding fixture. Figure 3 This is an exploded perspective view showing the components of a battery module according to Embodiment 1 of the present disclosure. Figure 4 This is a rear perspective view showing the busbar of a battery module according to Embodiment 1 of the present disclosure. Figure 5 It is shown Figure 1 A partial horizontal cross-sectional view of the battery module taken along line CC′. For example, Figure 1 The X-axis, Y-axis, and Z-axis directions represent the directions to the right, backward, and upward, respectively.

[0045] See Figures 1 to 5 According to Embodiment 1 of this disclosure, the battery module 100 includes a plurality of battery cells 110, a busbar 120 and a busbar frame 130, the busbar frame 130 including a clamp support portion 131.

[0046] Specifically, multiple battery cells 110 can be arranged in a left-right direction (X-axis direction). Each battery cell 110 can be a pouch cell, and each cell 110 includes an electrode assembly (not shown), an electrolyte solution (not shown), and a pouch 116, with the electrode assembly and electrolyte solution housed within the pouch 116. The periphery of the pouch 116 can be heat-sealed. A cylinder 140 can be located between the multiple battery cells 110. The cylinder 140 can be configured to allow the multiple battery cells 110 to be arranged uniformly. A portion of each battery cell 110 can be housed within the cylinder 140. For example, the cylinder 140 may comprise an electrically insulating plastic material.

[0047] Furthermore, each of the plurality of battery cells 110 may include electrode leads 111. The electrode leads 111 may be formed of an aluminum alloy or a copper alloy. For example, the battery cell 111 may include a positive electrode lead 111a and a negative electrode lead 111b at both ends in the front-rear direction. The electrode leads 111 may protrude from the flexible package 116 in the front-rear direction. The electrode leads 111 may be bent in the left-right direction, for example, by means of a bending jig. For example, as... Figure 3 As shown, the positive lead 111a can be bent to the right. The negative lead 111b can be bent to the left.

[0048] However, the battery cell 110 is not limited to the pouch cell 110, and can be any of the various battery cells 110 known at the time of filing of this application.

[0049] Furthermore, the battery module 100 may also include at least one busbar 120 for electrically connecting a plurality of battery cells 110. Specifically, the busbar 120 may include a conductive metal. The conductive metal may be, for example, copper, aluminum, or nickel. The busbar 120 may be electrically connected to module terminals 150. For example, as Figure 1 As shown, the rightmost end of the busbar 120 can be electrically connected to the module terminal 150.

[0050] In addition, such as Figure 3 As shown, the busbar 120 may include a lead through-hole H1 through which an electrode lead 111 passes. The electrode lead 111 may protrude outward through the lead through-hole H1. The protrusion of the electrode lead 111 may be bent to the left or right to contact the outer surface of the busbar 120. Due to this structural feature, the busbar 120 can be electrically connected to a positive electrode lead 111a and a negative electrode lead 111b. The busbar 120 may include a lead solder portion 121 for bonding the electrode leads 111 to each of the plurality of battery cells 110. For example, the electrode lead 111 may be soldered to the outer surface of the lead solder portion 121. In this case, the soldering method is not limited to a specific method, and laser soldering or ultrasonic soldering may be used. For example, as Figure 5 As shown, when the electrode lead 111 is pressed toward the busbar 120 by the pressing part 11 of the welding fixture 10, the electrode lead 111 and the lead welding part 121 of the busbar 120 can be laser welded by the laser emitted by the laser welding equipment 20.

[0051] Furthermore, at least one busbar 120 may be mounted on the outer surface of the busbar frame 130. Additionally, the busbar frame 130 may include a lead insertion hole H2 communicating with the lead through hole H1 of the busbar 120, through which the electrode leads 111 of the battery cell 110 may pass.

[0052] The busbar frame 130 may include an insertion space N into which at least a portion 125 of the busbar 120 is inserted. For example, as Figure 5 As shown, the rear end 125 of the lead solder portion 121 of the busbar 120 can be inserted into the insertion space N formed in the busbar frame 130. With the busbar 120 mounted on the busbar frame 130, this connection structure between the busbar 120 and the busbar frame 130 restricts the movement of the busbar 120 in the left-right direction. In other words, because a portion of the busbar 120 is inserted into the insertion space N, the busbar 120 can be stably fixed to the busbar frame 130.

[0053] Furthermore, the busbar frame 130 may include a clamp support 131. The clamp support 131 may be a portion of the busbar frame 130 that protrudes further outward (in the Y-axis direction) than the rest of the busbar frame 130. The clamp support 131 can support the welding clamp 10 in a direction opposite to the pressing direction of the welding clamp 10. The welding clamp 10 can secure the electrode lead 111 in close contact with the busbar 120. The welding clamp 10 can press the outer surface (front surface) of the electrode lead 111 in a rearward direction. Additionally, when the welding clamp 10 secures the electrode lead 111 located at the rear of the battery module 100 to the busbar 120, the welding clamp 10 can press the outer surface of the welding electrode lead 111 in a forward direction.

[0054] like Figure 2 As shown, the welding fixture 10 may include two pressing portions 11 for pressing the electrode lead 111 toward the busbar 120 or busbar frame 130. Each of the two pressing portions 11 may have a flat outer surface parallel to the electrode lead 111. Based on the lead welding portion of the busbar, the two pressing portions 11 may be spaced apart from each other in the left-right direction.

[0055] Therefore, according to the configuration of this disclosure, since the busbar frame 130 includes an insertion space N for inserting at least a portion of the busbar 120 and a clamp support 131 for supporting the welding fixture 10, the electrode lead 111 and the lead welding portion 121 of the busbar 120 can be stably kept in close contact. That is, since the busbar frame 130 can stably restrict the movement of the busbar 120 by accommodating a portion of the busbar 120, and can effectively control the pressing force of the welding fixture 10 by using the clamp support 131, the busbar frame 130 can prevent the busbar 120 from moving or deforming under the pressing force of the welding fixture 10. Therefore, the welding reliability between the electrode lead 111 and the busbar 120 can be effectively improved.

[0056] Furthermore, the busbar 120 may also include a clamp extension 122. The clamp support 122 can support the welding clamp 10 in a direction opposite to the pressing direction of the welding clamp 10. The clamp extension 122 can extend from both sides of the lead welding portion 121 in the left-right direction. That is, the clamp extension 122 can support the welding clamp 10 together with the clamp support 131 of the busbar frame 130 in a direction opposite to the pressing direction.

[0057] Therefore, according to the configuration of this disclosure, since this disclosure includes a busbar 120, which includes a clamp extension 122 for supporting the welding fixture 10 together with the clamp support 131 of the busbar frame 130, a greater force can be applied to restrain the welding fixture 10 compared to the prior art where the welding fixture 10 is only supported by the busbar 120, thus providing more stable support for the welding fixture 10. Furthermore, since the clamp support 131 of the busbar frame 130 supports the welding fixture 10, the welding fixture 10 can be stably supported even when the structural rigidity of the portion of the busbar 120 supporting the welding fixture 10 is relatively small. Therefore, the thickness of the clamp extension 122 of the busbar 120 can be further reduced. For example, the thickness of the clamp extension 122 of the busbar 120 can be less than the thickness of the lead bonding portion 121. Finally, since the size of the busbar 120 can be effectively reduced, the battery module 100 of this disclosure can have a lighter weight and can effectively reduce the manufacturing cost of the battery module.

[0058] Furthermore, according to this disclosure, since both the clamp support portion 131 of the busbar frame 130 and the clamp extension portion 122 of the busbar 120 can jointly support the welding clamp 10, the welding clamp 10 can be supported more stably. Therefore, since the electrode lead 111 can be stably fixed on the busbar 120, the weldability between the electrode lead 111 and the busbar 120 can be effectively improved.

[0059] The busbar 120 may include a frame insertion portion 132, which includes an internal space into which the welding fixture 131 is inserted. For example, Figure 5 As shown, the clamp support portion 131 of the busbar 130 can face the rear surface of the clamp extension portion 122 of the busbar 120. An internal space for inserting the clamp support portion 131 can be formed in the clamp extension portion 122 (the clamp extension portion 122 is formed on each of the two sides of the busbar 120).

[0060] Therefore, according to the configuration of this disclosure, since the busbar 120 includes a frame insertion portion 132, and the frame insertion portion 132 includes an internal space for the clamp support portion 131 to be inserted therein, the bonding area between the busbar 120 and the busbar frame 130 can be effectively increased, thus maintaining a stable bonding between the busbar 120 and the busbar frame 130. Furthermore, in this disclosure, since the clamp support portion 131 of the busbar frame 130 and the clamp extension portion 122 of the busbar 120 can support the welding fixture 10 when stacked on top of each other, the welding fixture 10 can be supported more stably. Therefore, since the electrode lead 111 can be stably fixed to the busbar 120, the weldability between the electrode lead 111 and the busbar 120 can be effectively improved.

[0061] Figure 6 This is a perspective view showing the busbar of a battery module according to Embodiment 2 of the present disclosure. Figure 7 This is a partial horizontal cross-sectional view showing a battery module according to Embodiment 2 of the present disclosure.

[0062] See Figure 6 and Figure 7 When comparing the battery module 100 of Embodiment 2 according to this disclosure with the battery module 100 of Embodiment 1, the shape of the busbar 120 may be different. Other components are the same as those of the battery module 100 of Embodiment 1, and therefore a more detailed description thereof will be omitted.

[0063] Figure 6 A portion 120a of the busbar 120 may protrude outward. For example, a portion 120a of the busbar 120 that is relatively away from the lead through-hole H1 may protrude outward. That is, a portion of the end 111t of the busbar 120 on which the electrode lead 111 is to be disposed may protrude outward. Figure 6 As shown, both ends can protrude forward relative to the lead through-hole H1 of the busbar 120. The outwardly protruding portion 120a may include a through-slit L1 through which the end 111t of the electrode lead 111 passes. For example, as... Figure 7 As shown, the electrode lead 111 passing through the lead through hole H1 of the busbar 120 can be bent to contact the lead soldering portion 121 of the busbar 120, and the end 111t of the bent electrode lead 111 can pass through the through slit L1 of the busbar 120. The electrode lead 111 can be fixed with the end 111t inserted into the through slit L1 of the busbar 120.

[0064] Therefore, in the configuration of this disclosure, since the busbar 120 includes a through slit L1 for inserting the end 111t of the electrode lead 111, the electrode lead 111 can be stably fixed to the busbar 120 while maintaining close contact with the lead soldering portion 121. Thus, in this disclosure, the solderability between the electrode lead 111 and the busbar 120 can be effectively improved.

[0065] Figure 8 This is a partial horizontal cross-sectional view showing a battery module according to Embodiment 3 of the present disclosure.

[0066] See Figure 8 According to Embodiment 3 of this disclosure, the battery module and Figure 7 Compared to the battery module of Embodiment 2, the shape of the busbar 120 can be different. That is to say, Figure 8 The busbar 120 may include an insertion groove P1 instead of through a slit L1. Figure 8 Other components of the battery module 100 and Figure 7 The other components of the battery module 100 are the same.

[0067] Specifically, a portion 120a of the busbar 120 may protrude outward. For example, a portion 120a of the busbar 120 that is relatively away from the lead through-hole H1 may protrude outward. That is, a portion of the end 111t of the busbar 120 on which the electrode lead 111 is to be disposed may protrude further outward. Both ends may protrude forward relative to the lead through-hole H1 of the busbar 120. The outwardly protruding portion 120a may include an insertion groove P1 into which the end of the electrode lead 111 is inserted. For example, as Figure 8 As shown, the electrode lead 111 passing through the lead through hole H1 of the busbar 120 can be bent to contact the lead welding portion 121 of the busbar 120, and the bent end of the electrode lead 111 can be inserted into the insertion groove P1 of the busbar 120. The electrode lead 111 can be fixed with its end 111t inserted into the insertion groove P1 of the busbar 120.

[0068] Therefore, according to the configuration of this disclosure, since the busbar 120 includes an insertion groove P1 for inserting the end of the electrode lead 111, the electrode lead 111 can be stably fixed to the busbar 120 while maintaining close contact with the lead soldering portion 121. Thus, in this disclosure, the solderability between the electrode lead 111 and the busbar 120 can be effectively improved.

[0069] Figure 9 This is a perspective view showing the busbar and busbar frame of a battery module according to Embodiment 4 of the present disclosure. Figure 10 This is a horizontal cross-sectional view showing a battery module according to Embodiment 4 of the present disclosure.

[0070] See Figure 9 and Figure 10 In the battery module according to Embodiment 4 of this disclosure, the clamp support portion 131 of the busbar frame 130 can directly contact the electrode lead 111. That is, in the battery module 100 according to Embodiment 1 of this disclosure, the clamp extension portion 122 of the busbar 120 contacts the electrode lead 111, while in the battery module 100 according to Embodiment 4 of this disclosure, the clamp extension portion 122 (see...) is used to support the components of the welding clamp 10. Figure 5 It may not be formed on the busbar 120. Instead, the clamp support 131 of the busbar frame 130 can restrict the welding clamp 10 in the opposite direction to the pressing force of the welding clamp 10 and can support the welding clamp 10.

[0071] For example, such as Figure 9As shown, the clamp support portion 131 of the busbar frame 130 can protrude outward (previously) parallel to the outer surface of the lead solder portion 121 of the busbar 120. Furthermore, the clamp support portion 131 of the busbar frame 130 can be inserted into the internal space formed in each of the two ends of the busbar 120.

[0072] For example, such as Figure 10 As shown, the electrode lead 111 passing through the lead through hole H1 in the busbar 120 can be bent to directly contact the clamp support portion 131 of the busbar frame 130, and the end of the bent electrode lead 111 can be located on the clamp support portion 131 of the busbar frame 130. Furthermore, the electrode lead 111 can be pressed by the welding clamp 10 to be fixed to the clamp support portion 131 of the busbar frame 130.

[0073] Therefore, according to the configuration of this disclosure, since the clamp support 131 contacts the electrode lead 111, a portion of the busbar 120 does not require support from the welding clamp 10, and thus this portion can be omitted. Therefore, in the battery module 100 according to this disclosure, since the size of the busbar 120 can be effectively reduced, a lighter battery module 100 can be provided, and the manufacturing cost of the battery module 100 can be effectively reduced.

[0074] Figure 11 This is a partial perspective view of the busbar and busbar frame of a battery module according to Embodiment 5 of this disclosure. Figure 12 This is a partial horizontal cross-sectional view showing a battery module according to Embodiment 5 of the present disclosure.

[0075] See Figure 11 and Figure 12 A portion of the clamp support 131 may protrude outward. For example, a portion 131a of the clamp support 131, relatively away from the lead through hole H1 of the busbar 120, may protrude outward. That is, a portion of the clamp support 131 on which the end of the electrode lead 111 is to be placed may protrude further outward. The clamp support 131 of the busbar frame 130 is formed on each of the two sides of the busbar frame 130 relative to the lead through hole H1 of the busbar 120. The outwardly protruding portion 131a may include a fixing slit L2 through which the end of the electrode lead 111 passes. For example, as Figure 12 As shown, the electrode lead 111 passing through the lead through hole H1 of the busbar 120 can be bent to contact the lead welding portion 121 of the busbar 120, and the end of the bent electrode lead 111 can be inserted into the fixing slit L2 of the clamp support portion 131. The electrode lead 111 can be fixed with its end inserted into the fixing slit L2 of the busbar frame 130.

[0076] Therefore, according to the configuration of this disclosure, since the clamp support portion 131 of the busbar frame 130 includes a fixing slit L2 through which the end of the electrode lead 111 passes, the electrode lead 111 can be stably fixed to the busbar 120 while in close contact with the lead welding portion 121. Thus, in this disclosure, the weldability between the electrode lead 111 and the busbar 120 can be effectively improved.

[0077] Figure 13 This is a partial horizontal cross-sectional view showing a battery module according to Embodiment 6 of the present disclosure.

[0078] When the battery module 100 according to Embodiment 6 of this disclosure and Figure 12 Compared to the battery module 100 of Embodiment 5, the shape of the clamp support portion 131 of the busbar frame 130 can be different. That is, Figure 13 The clamp support 131 may include a fixing groove P2 instead of a fixing slit L2 (see Figure 12 ). Figure 13 Other components of the battery module 100 and Figure 12 The other components of the battery module 100 are the same, so a more detailed description of it will be omitted.

[0079] See Figure 13 A portion 131a of the clamp support 131 may protrude outward. For example, a portion 131a of the clamp support 131 that is relatively far from the lead through hole H1 of the busbar 120 may protrude outward. That is, a portion of the end of the clamp support 131 on which the electrode lead 111 is to be placed may protrude further outward. A portion 131a of the clamp support 131 is formed on each of the two sides of the busbar frame 130 relative to the lead through hole H1 of the busbar 120. The outwardly protruding portion may include a fixing groove P2 into which the end of the electrode lead 111 is inserted. For example, as Figure 13 As shown, the electrode lead 111 passing through the lead through hole H1 of the busbar 120 can be bent to contact the lead welding portion 121 of the busbar 120, and the end of the bent electrode lead 111 can be inserted into the fixing groove P2 of the clamp support portion 131. The electrode lead 111 can be fixed with its end inserted into the fixing groove P2 of the busbar frame 130.

[0080] Therefore, according to the configuration of this disclosure, since the clamp support portion 131 of the busbar frame 130 includes a fixing groove P2 for inserting the end of the electrode lead 111, the electrode lead 111 can be stably fixed to the busbar 120 while in close contact with the lead welding portion 121. Therefore, in this disclosure, the weldability between the electrode lead 111 and the busbar 120 can be effectively improved.

[0081] The battery pack (not shown) according to embodiments of the present disclosure may further include various different devices (not shown) for controlling the charging and discharging of the battery module 100, such as a battery management system (BMS), a current sensor, and a fuse.

[0082] Figure 14 This is a side view showing the appearance of a vehicle according to an embodiment of the present disclosure.

[0083] See Figure 14 The battery module 100 according to embodiments of the present disclosure may be included in a vehicle 200, such as an electric vehicle or a hybrid electric vehicle. That is, the battery module 100 may be installed in the vehicle body of the vehicle 200 according to embodiments of the present disclosure.

[0084] Those skilled in the art will understand that when using terms such as up, down, left, right, front, and back to indicate direction, these terms are merely for ease of explanation and may vary depending on the position of the target object, the observer, etc.

[0085] Although one or more embodiments of this disclosure have been described with reference to examples and drawings, this disclosure is not limited thereto, and those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this disclosure as defined by the appended claims.

[0086] [Figure Labels]

[0087] 100: Battery module; 110: Individual battery cell

[0088] 111, 111a, 111b: Electrode leads, positive lead, negative lead

[0089] 120: Busbar 130: Busbar Frame

[0090] H1: Lead wire through hole; H2: Lead wire insertion hole

[0091] 121: Lead wire soldering part; 131: Clamp support part

[0092] 122: Fixture extension; 132: Frame insertion part

[0093] L1: Through the slit P1: Insert into the groove

[0094] L2: Fixed slit; P2: Fixed groove

[0095] 10: Welding fixtures 200: Vehicles

Claims

1. A battery module, comprising: A plurality of battery cells, each of the plurality of battery cells including electrode leads; A busbar, the busbar including a lead solder joint that engages with the electrode lead of each of the plurality of battery cells, and a portion of the electrode lead is bent to contact the lead solder joint; as well as A busbar frame includes an insertion space and a clamping support, wherein at least a portion of the busbar is inserted into the insertion space, and the clamping support is configured to support the welding clamp in a direction opposite to the pressing direction of a welding clamp configured to press the electrode leads. The busbar frame includes a lead insertion hole, and the busbar includes a lead through hole. A portion of the electrode lead passes through the lead insertion hole and the lead through hole and is bent to contact the lead solder joint. Wherein, the clamp support portion is a protrusion of the busbar frame in the direction opposite to the pressing direction of the welding clamp, and A portion of the clamp support protrudes outward, and a fixing slit or fixing groove is formed in the outwardly protruding portion of the clamp support. The end of the electrode lead passes through the fixing slit or is inserted into the fixing groove.

2. The battery module according to claim 1, wherein, The busbar also includes a clamp extension for supporting the welding fixture in a direction opposite to the pressing direction of the welding fixture.

3. The battery module according to claim 2, wherein, The busbar also includes a frame insertion part, which includes an internal space, and the clamp support part is inserted into the internal space.

4. The battery module according to claim 1, wherein, The clamp support portion is in contact with the electrode lead.

5. A battery pack comprising at least one battery module according to any one of claims 1 to 4.

6. A vehicle comprising at least one battery module according to any one of claims 1 to 4.

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