Connector, and battery assembly and battery module comprising same

Abstract

The present invention relates to a connector. The connector according to one aspect of the present invention is a battery cell connector for electrically connecting a battery cell to the outside, and comprises: a base member having a lead surface on which an electrode lead of the battery cell can be placed; and a conducting assembly coupled to the base member so as to be electrically connectable to the electrode lead placed on the lead surface, wherein the conducting assembly can include: a conductive contact member movably coupled to the base member so that at least a part thereof can protrude from the lead surface of the base member; and an elastic member for elastically supporting the contact member toward the lead surface of the base member.

Description

Connector, battery assembly including same, and battery module

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2024-0014257, dated January 30, 2024, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present invention relates to a connector, a battery assembly including the same, and a battery module, and more particularly, to a connector for electrically connecting a battery cell to the outside, and a battery assembly including the same and a battery module.

[0005] Common types of secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, and lithium-ion polymer batteries. These batteries are used not only in small products such as digital cameras, DVDs, MP3 players, mobile phones, PDAs, portable game devices, power tools, and e-bikes, but also in larger products requiring high output, such as electric and hybrid vehicles, as well as in power storage devices that store surplus power or renewable energy, and as backup power storage devices.

[0006] Secondary batteries can be provided in the form of battery cells. Battery cells are classified into cylindrical, square, or pouch types depending on the shape of the housing material they accommodate, and depending on the shape of the electrode assembly, they are roughly classified into a jelly roll type in which a separator is interposed between long sheets of positive and negative electrodes coated with active materials, a stack type in which a plurality of positive and negative electrodes of a predetermined size are sequentially stacked while being interposed between separators, and a stack / folding type in which stacked unit cells are wound with a long separator film.

[0007] Meanwhile, multiple battery cells may be electrically connected to each other. This may be to increase the electrical capacity or voltage that can be charged and discharged. For this purpose, the electrode leads of the battery cells may be connected to each other. An electrode lead is a conductive member that protrudes or extends outside of a battery cell and is configured to connect the electrode assembly inside the battery cell to an external power source, load, or component. These electrode leads are typically provided in the form of films, sheets, wires, bus bars, or metal pieces.

[0008] However, a welding process was previously required to connect the electrode leads of battery cells. These battery cell electrode leads were electrically connected either directly by welding to each other or by welding together to a busbar, which served as an intermediate medium.

[0009] This conventional method of joining batteries required bending of the electrode leads to modularize the stacking of battery cells. Furthermore, it required additional components, such as busbars, to perform the welding process. Furthermore, after multiple battery cells were welded together, it was difficult to select and separate specific cells.

[0010] Accordingly, there has been an urgent need for the development of connectors that can electrically connect battery cells to the outside (e.g., other battery cells, external loads or power sources) without using a welding process, and battery assemblies and battery modules including the connectors.

[0011] The present invention has been devised to solve the above problems, and the object of the present invention is to provide a connector that can electrically connect a battery cell to the outside (e.g., another battery cell, an external load or power source, etc.) without using a welding process, and a battery assembly and battery module including the connector.

[0012] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0013] According to one aspect of the present invention, a connector for a battery cell for electrically connecting a battery cell to the outside is provided, comprising: a base member having a lead surface on which an electrode lead of a battery cell can be placed; and a conductive assembly coupled to the base member and electrically connected to the electrode lead placed on the lead surface, wherein the conductive assembly includes: a conductive contact member movably coupled to the base member such that at least a portion thereof can protrude above the lead surface of the base member; and an elastic member for elastically supporting the contact member toward the lead surface of the base member.

[0014] At this time, at least a portion of the contact member may be formed convexly in a direction perpendicular to the lead surface.

[0015] At this time, a hole for a contact member that is opened onto the lead surface is formed in the base member, and the contact member can protrude onto the lead surface through the hole for the contact member.

[0016] At this time, the opening of the hole for the contact member formed on the lead surface may have a diameter smaller than that of the contact member.

[0017] At this time, the diameter of the hole for the contact member may increase as it moves away from the lead surface.

[0018] At this time, the contact member may have a spherical shape.

[0019] At this time, the above-mentioned electric connection assembly further includes a bearing member that supports the contact member so that it can move in a cloud, and the elastic member can elastically support the bearing member.

[0020] At this time, the bearing member includes a bearing portion that supports the contact member; and a rod portion that extends from the bearing portion in a direction away from the contact member, and the elastic member may be formed of a spring inserted through the rod portion.

[0021] At this time, the above-mentioned power-conducting assembly may further include a guide portion extending from the base member in a direction away from the lead surface, and the bearing member may be provided to be guided by the guide portion.

[0022] At this time, the base member may be made of a conductive material so as to be electrically connected to the electrically conductive assembly.

[0023] At this time, the base member may include a positive electrode side base portion having a positive electrode lead surface on which a positive electrode lead can be placed; and a negative electrode side base portion having a negative electrode lead surface on which a negative electrode lead can be placed; and the current-conducting assembly may include a positive electrode side current-conducting assembly coupled to the positive electrode side base portion; and a negative electrode side current-conducting assembly coupled to the negative electrode side base portion.

[0024] At this time, the base member may further include an insulating portion interposed between the positive electrode side base portion and the negative electrode side base portion.

[0025] At this time, the base member includes a pair of base portions spaced apart at a predetermined distance so that an electrode lead of a battery cell can be inserted between them; and a connecting portion connecting the pair of base portions so that they support each other, and the lead surfaces are provided as a pair and formed on each of the pair of base portions, and can be arranged to face each other.

[0026] At this time, the above-mentioned power-conducting assembly is provided in a plurality, and some of the plurality of power-conducting assemblies can be coupled to one of the pair of base parts, and the remaining some can be coupled to the other of the pair of base parts.

[0027] At this time, the plurality of energizing assemblies may be arranged so as to be offset from each other in a direction in which the pair of base portions are spaced apart.

[0028] At this time, a catch member that can be moved onto the lead surface so as to be caught by an electrode lead placed on the lead surface may be further included.

[0029] At this time, the base member includes a base portion that extends in one direction and has the lead surface provided on the side, the energizing assembly is provided in a plurality of pieces and arranged along the direction in which the base portion extends, and the catching member is provided in a plurality of pieces and can be arranged in a direction perpendicular to the direction in which the base portion extends.

[0030] According to another aspect of the present invention, a battery assembly is provided, comprising: a battery cell including a cell body having an electrode assembly and an electrode lead electrically connected to the electrode assembly and extending outwardly of the cell body; and a connector for electrically connecting the battery cell to the outside, wherein the connector includes: a base member having a lead surface on which the electrode lead is placed; and a conductive assembly coupled to the base member and electrically connected to the electrode lead placed on the lead surface, wherein the conductive assembly includes: a conductive contact member movably coupled to the base member such that at least a portion thereof can protrude above the lead surface of the base member; and an elastic member elastically supporting the contact member toward the lead surface of the base member, wherein the electrode lead of the battery cell and the contact member are electrically conductive to each other.

[0031] According to another aspect of the present invention, there is provided a battery module comprising: a housing; a plurality of battery assemblies accommodated in the housing and arranged in a row, the battery assemblies including: a battery cell including a cell body having an electrode assembly and an electrode lead electrically connected to the electrode assembly and extending outwardly of the cell body; and a connector for electrically connecting the battery cell to the outside, the connector including: a base member having a lead surface on which the electrode lead is placed; and a conductive assembly coupled to the base member and electrically connectable to the electrode lead placed on the lead surface, the conductive assembly including: a conductive contact member movably coupled to the base member such that at least a portion thereof can protrude above the lead surface of the base member; and an elastic member elastically supporting the contact member toward the lead surface of the base member.

[0032] At this time, an insulating member is included between each of the plurality of battery assemblies, and the insulating member can each contact a base member of an adjacent battery assembly among the plurality of battery assemblies.

[0033] According to one aspect of the present invention, a conductive contact member is movably provided so as to protrude onto a lead surface of a base member, and an elastic member is configured to elastically support the contact member toward the lead surface.

[0034] Accordingly, since the contact member can contact and conduct electricity with the electrode lead of the battery cell mounted on the lead surface, the battery cell can be electrically connected to the outside without using a welding process.

[0035] According to one aspect of the present invention, since the opening of the contact member hole formed in the base member has a smaller diameter than the contact member, the contact member may not fall off onto the lead surface. This can enhance the structural stability of the connector, and furthermore, the contact force between the contact member and the electrode lead can be appropriately controlled.

[0036] According to one aspect of the present invention, since an insulating portion is provided between the positive side base portion and the negative side base portion of the base member, short circuiting between the positive lead and the negative lead of the battery cell can be prevented.

[0037] According to one aspect of the present invention, the base portion of the base member is configured as a pair and spaced apart from each other, so that an electrode lead can be inserted and joined between them. Accordingly, the coupling and connection between the connector and the battery cell can be more stably achieved.

[0038] According to one aspect of the present invention, since a catch member capable of catching an electrode lead secured to a lead surface of a base member is provided, the coupling and connection between the connector and the battery cell can be more stably achieved.

[0039] The effects of the present invention are not limited to the effects described above, and effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention pertains from this specification and the attached drawings.

[0040] Figure 1 is a schematic diagram showing a battery module according to one embodiment of the present invention.

[0041] FIG. 2 is a horizontal cross-sectional view of a plurality of battery assemblies included in a battery module according to one embodiment of the present invention.

[0042] Figure 3 is a perspective view of a battery assembly according to one embodiment of the present invention.

[0043] Figure 4 is a cross-sectional view according to II of Figure 3.

[0044] Figure 5 is an enlarged view of part A of Figure 4.

[0045] FIG. 6 is a drawing for explaining a process of coupling a battery cell to a connector according to one embodiment of the present invention.

[0046] Fig. 7 is a cross-sectional view according to II-II of Fig. 3.

[0047] Fig. 8 is a cross-sectional view according to Ⅲ-Ⅲ of Fig. 3.

[0048] FIG. 9 is a horizontal cross-sectional view of a plurality of battery assemblies included in a battery module according to another embodiment of the present invention.

[0049] Preferred embodiments of the present invention are described in detail so that those skilled in the art can easily implement them. However, the present invention may be implemented in various different forms and is not limited or restricted by the following examples.

[0050] In order to clearly explain the present invention, a detailed description of a part that is irrelevant to the description or a related known technology that may unnecessarily obscure the gist of the present invention has been omitted, and when adding reference signs to components of each drawing in this specification, the same or similar reference signs are attached to the same or similar components throughout the specification.

[0051] In addition, terms or words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0052] FIG. 1 is a schematic diagram of a battery module according to one embodiment of the present invention. FIG. 2 is a horizontal cross-sectional view of a plurality of battery assemblies included in a battery module according to one embodiment of the present invention.

[0053] FIG. 1 and FIG. 2 disclose a battery module (1) according to one embodiment of the present invention. Referring to FIG. 1, the battery module (1) according to one embodiment of the present invention may be a module for charging and storing electric energy or discharging and providing electric energy to another device or apparatus.

[0054] A battery module (1) according to one embodiment of the present invention may include a housing (10). The housing (10) may be configured to accommodate and protect other components of the battery module (1). For this purpose, the housing (10) may be made of a plastic or metal material having a predetermined rigidity, but is not limited thereto.

[0055] In this embodiment, the housing (10) may be formed as a box-shaped structure. The housing (10) may be formed by combining or assembling a plurality of plates. However, the shape of the housing (10) may be appropriately modified as needed.

[0056] In this embodiment, a terminal (12) may be connected through the housing (10). The terminal (12) may be a terminal for electrically connecting the battery assemblies (30) described below to other external devices or power sources. Such a terminal (12) may be formed of various known connectors for electrically connecting different configurations.

[0057] In this embodiment, connecting members (14) may be provided inside the housing (10). The connecting members (14) may be configured to electrically connect components accommodated inside the housing (10) to each other. The connecting members (14) may be formed of, but are not limited to, a bus bar, a wire, a conductive metal piece, or the like.

[0058] As shown in FIGS. 1 and 2, in the present embodiment, a plurality of battery assemblies (30) can be accommodated inside the housing (10), and the connecting member (14) can connect these battery assemblies (30) and terminals (12) in a predetermined manner.

[0059] As an example, the connecting member (14) can connect the battery assemblies (30) in series with each other. More specifically, if three battery assemblies arranged as shown in FIG. 2 are named a first battery assembly (30a), a second battery assembly (30b), and a third battery assembly (30c) in the order of arrangement from the front (positive direction of the X-axis) to the rear (negative direction of the X-axis), the connecting member (14) can connect the first to third battery assemblies (30a to 30c) in series according to the arrangement order.

[0060] More specifically, the connecting member (14) can electrically connect the positive lead (42a) of the first battery assembly (30a) to the negative lead (44b) of the second battery assembly (30b), and can electrically connect the positive lead (42b) of the second battery assembly (30b) to the negative lead (44c) of the third battery assembly (30c).

[0061] And, as illustrated in Fig. 1, the connecting member (14) can electrically connect the battery assemblies (30) connected in series and the terminal (12). The arrangement of such connecting member (14) can be appropriately changed in consideration of the connection method of the battery assemblies (30) and the structure of the battery module (1).

[0062] Referring again to FIG. 1, a battery module (1) according to one embodiment of the present invention may include at least one battery assembly (30). The battery assembly (30) may be an assembly that charges and stores electric energy or discharges and provides stored electric energy to the outside. In other words, the battery assembly (30) may be a component that is responsible for the charging and discharging function in the battery module (1).

[0063] In the present embodiment, the battery assembly (30) may be configured in multiple units. The multiple battery assemblies (30) may be electrically connected in a predetermined manner by the aforementioned connecting member (14). Through this, the electric capacity, voltage, etc. of the battery module (1) may be increased.

[0064] Hereinafter, a battery assembly according to one embodiment of the present invention will be specifically described with different drawings.

[0065] Fig. 3 is a perspective view of a battery assembly according to one embodiment of the present invention. Fig. 4 is a cross-sectional view taken along line II of Fig. 3. Fig. 5 is an enlarged view of portion A of Fig. 4. Fig. 6 is a drawing for explaining a process of coupling a battery cell to a connector according to one embodiment of the present invention. Fig. 7 is a cross-sectional view taken along line II-II of Fig. 3. Fig. 8 is a cross-sectional view taken along line III-III of Fig. 3.

[0066] Referring to FIG. 3, a battery assembly (30) according to one embodiment of the present invention may include a battery cell (40). Such a battery cell (40) may be formed of a secondary battery. In this embodiment, the battery cell (40) may be a pouch-type battery cell. However, the type of the battery cell (40) is not particularly limited, and the battery cell (40) may be formed of a cylindrical battery cell or a square battery cell, etc.

[0067] In the present embodiment, the battery cell (40) may include a cell body (41) and electrode leads (42, 44). The cell body (41) may be provided with an electrode assembly in which a positive electrode and a negative electrode are laminated, and may be charged and discharged. The electrode leads (42, 44) may be configured to electrically connect the electrode assembly provided in the cell body (41) to the exterior of the battery cell (40).

[0068] In this embodiment, the electrode leads (42, 44) may protrude (or extend) outward from the cell body (41). As illustrated, the electrode leads (42, 44) may extend downward (in the negative direction of the Z-axis) from the cell body (41), and may be formed of a conductive material having a predetermined thickness in the front-back direction (X-axis direction).

[0069] In the present embodiment, the electrode leads (42, 44) may include a positive electrode lead (42) and a negative electrode lead (44) that protrude (or extend) parallel to each other. The positive electrode lead (42) may be electrically connected to the positive electrode of the electrode assembly, and the negative electrode lead (44) may be electrically connected to the negative electrode of the electrode assembly. By means of the positive electrode lead (42) and the negative electrode lead (44), the positive electrode and the negative electrode of the electrode assembly may be electrically connected to other components other than the battery cell (40), respectively.

[0070] At this time, as illustrated in Fig. 8, a catch groove (43, 45) may be formed in the electrode leads (42, 44). The catch groove (43, 45) may interact with a catch assembly (80) of a connector (50) described later to reinforce the bonding strength between the battery cell (40) and the connector (50).

[0071] In this embodiment, the catch grooves (43, 45) may be formed in the positive lead (42) and the negative lead (44), respectively. Hereinafter, the catch groove (43, 45) formed in the positive lead (42) is referred to as the positive lead-side catch groove (43), and the catch groove (43, 45) formed in the negative lead (44) is referred to as the negative lead-side catch groove (45).

[0072] In this embodiment, the positive lead side catch groove (43) may be formed on the side edge portion of the positive lead (42). At this time, the side edge portion may be the edge portion of the side (negative direction of the Y axis) located farthest from the negative lead (44) among the left and right sides (Y-axis direction) of the positive lead (42).

[0073] In this embodiment, the positive lead side engaging groove (43) may be configured in multiple numbers. The multiple positive lead side engaging grooves (43) may be spaced apart along the vertical direction (Z-axis direction), which is the extension direction of the positive lead (42). This may be to further strengthen the bonding force between the positive lead (42) and the connector (50).

[0074] In the present embodiment, the negative lead side engaging groove (45) may be formed on the side edge portion of the negative lead (44). At this time, the side edge portion may be the edge portion of the side (positive direction of the Y-axis) located farther away from the positive lead (42) among the left and right sides (Y-axis direction) of the negative lead (44). In other words, the negative lead side engaging groove (45) may face the positive lead side engaging groove (43).

[0075] In this embodiment, the negative lead side engaging groove (45) may be configured in multiple numbers. The multiple negative lead side engaging grooves (45) may be spaced apart along the vertical direction (Z-axis direction), which is the extension direction of the negative lead (44). This may be to further strengthen the bonding force between the negative lead (44) and the connector (50).

[0076] Meanwhile, in the present embodiment, the electrode leads (42, 44) are illustrated as conductive members having a predetermined thickness, but the positions and structures of the electrode leads (42, 44) are not particularly limited as long as they can connect the electrode assembly to the outside. As an example, the electrode leads (42, 44) may be formed of a conductive film or sheet.

[0077] Referring to FIGS. 3 and 4, a battery assembly (30) according to one embodiment of the present invention may include a connector (50). The connector (50) may be a configuration for electrically connecting a battery cell (40) to other configurations.

[0078] At this time, the connector (50) according to one embodiment of the present invention may be a connector that can electrically connect the battery cell (40) to the outside (e.g., another battery cell, an external load or power source, etc.) without using a welding process.

[0079] A connector (50) according to one embodiment of the present invention may include a base member (60). The base member (60) may be configured to provide a base on which other components of the connector (50) may be installed.

[0080] Referring to FIGS. 4 and 5, in the present embodiment, the base member (60) may include a base portion (61). The base portion (61) may provide a base on which a conductive assembly (70) described later is provided. The base portion (61) may be provided as a plate, frame, or block-shaped member having a predetermined thickness and extending in the width direction (Y-axis direction) of the electrode lead.

[0081] And, in this embodiment, the base portion (61) may include a lead surface (62). The lead surface (62) may be a surface on which the electrode leads (42, 44) are to be mounted. For this purpose, the lead surface (62) may be parallel to one surface of the electrode leads (42, 44).

[0082] In this embodiment, the base portion (61) may be extended to a length slightly longer than the width of the electrode leads (42, 44). Accordingly, one side of the electrode leads (42, 44) may be entirely seated on the lead surface (62) along the width direction.

[0083] At this time, in the present embodiment, a hole (63) for a contact member may be formed in the base portion (61). A contact member (71) described later may be movably coupled to the hole (63) for the contact member. A plurality of such holes (63) for the contact member may be configured corresponding to the number of contact members (71).

[0084] In this embodiment, one opening of the contact member hole (63) may be formed on the lead surface (62). In other words, the contact member hole (63) may be opened onto the lead surface (62). Accordingly, a portion of the contact member (71) may pass through the contact member hole (63) and come into contact with the electrode leads (42, 44) mounted on the lead surface (62).

[0085] At this time, in the present embodiment, the opening of the hole (63) for the contact member may have a diameter smaller than that of the contact member (71). The diameter (or cross-section) of the hole (63) for the contact member may increase in the direction away from the lead surface (62). This may be to prevent the contact member (71) from falling off onto the lead surface (62). This will be described later together with the contact member (71).

[0086] At this time, in the present embodiment, the base portion (61) may include a positive electrode base portion (61a) and a negative electrode base portion (61b). The positive electrode base portion (61a) may be a base portion (61) provided with a positive electrode lead surface (62a) on which the positive electrode lead (42) is mounted, and the negative electrode base portion (61b) may be a base portion (61) provided with a negative electrode lead surface (62b) on which the negative electrode lead (44) is mounted.

[0087] In this embodiment, the positive electrode base portion (61a) and the negative electrode base portion (61b) can be spaced apart from each other along the left-right direction (Y-axis direction) in which the positive electrode lead (42) and the negative electrode lead (44) are arranged.

[0088] At this time, the positive electrode side base portions (61a) are configured as a pair and can be spaced apart along the front-back direction (X-axis direction), which is the thickness direction of the positive electrode lead (42). In addition, the positive electrode side lead surface (62a) can be configured to face between the positive electrode side base portions (61a).

[0089] Due to this, the positive lead (42) can be inserted between a pair of positive side base portions (61a). And, both sides of the positive lead (42) can be respectively seated on the positive side lead surface (62a) provided on a pair of positive side base portions (61a). Of course, as illustrated, the positive lead (42) and the positive side lead surface (62a) may be somewhat spaced apart by the contact member (71).

[0090] At this time, in the present embodiment, the distance at which a pair of positive electrode side base portions (61a) are spaced in the front-back direction (X-axis direction) may correspond to the thickness of the positive electrode lead (42). As a result, the positive electrode lead (42) can be fitted between a pair of positive electrode side base portions (61a), thereby making the bonding force between the battery cell (40) and the connector (50) stronger.

[0091] Meanwhile, in the present embodiment, similar to the aforementioned positive side base portion (61a), the negative side base portion (61b) may also be configured as a pair and spaced apart along the front-back direction (X-axis direction), which is the thickness direction of the negative lead (44). In addition, the negative side lead surface (62b) may be configured to face between the pair of negative side base portions (61b). As a result, the negative lead (44) may be inserted between the pair of negative side base portions (61b).

[0092] Referring to FIGS. 3 and 4, the base member (60) of the connector (50) according to one embodiment of the present invention may include an insulating member (64). The insulating member (64) may be made of an insulating material and may be made of a block-shaped member having a predetermined rigidity.

[0093] In this embodiment, an insulating portion (64) may be interposed between the positive electrode base portion (61a) and the negative electrode base portion (61b). In other words, the positive electrode base portion (61a) and the negative electrode base portion (61b) may be connected via the insulating portion (64) interposed therebetween.

[0094] In this embodiment, the insulating portion (64) can close the right side (positive direction of the Y-axis) side portion of the space provided between a pair of positive-side base portions (61a) and the left side (negative direction of the Y-axis) side portion of the space provided between a pair of negative-side base portions (61b).

[0095] Accordingly, the positive electrode base portion (61a) and the negative electrode base portion (61b) can be structurally connected to form a single rigid body. In addition, the positive electrode lead (42) inserted between a pair of positive electrode base portions (61a) can be prevented from falling out between a pair of negative electrode base portions (61b), or the negative electrode lead (44) inserted between a pair of negative electrode base portions (61b) can be prevented from falling out between a pair of positive electrode base portions (61a).

[0096] Furthermore, the positive side base portion (61a) and the negative side base portion (61b) can be electrically connected to prevent a short circuit from occurring between the positive lead (42) and the negative lead (44). That is, the insulating portion (64) can increase both the electrical stability and structural stability of the connector (50).

[0097] The base member (60) of the connector (50) according to one embodiment of the present invention may include a connecting portion (65). The connecting portion (65) may be configured to supplement the structural stability of the base member (60).

[0098] In this embodiment, the connecting portion (65) may include an anode-side connecting portion (65a) connecting a pair of anode-side base portions (61a) and a cathode-side connecting portion (65b) connecting a pair of cathode-side base portions (61b).

[0099] At this time, in the present embodiment, the positive electrode side connecting portion (65a) may be positioned on the opposite side of the insulating portion (64) with the positive electrode lead (42) therebetween. With reference to Fig. 3, the opposite side may be the left side (negative direction of the Y-axis) of the positive electrode lead (42). The positive electrode side connecting portion (65a) may close the left side (negative direction of the Y-axis) of the space provided between a pair of positive electrode base portions (61a).

[0100] Due to this, the structural stability of the connector (50) can be increased by connecting a pair of positive side base portions (61a) to each other. In addition, the positive lead (42) inserted into a pair of positive side base portions (61a) can be prevented from falling out to the left (negative direction of the Y-axis).

[0101] Meanwhile, in the present embodiment, the negative electrode side connecting portion (65b) may be located on the opposite side of the insulating portion (64) with the negative electrode lead (44) interposed therebetween. With reference to Fig. 3, the opposite side may be the right side (positive direction of the Y-axis) of the negative electrode lead (44). The negative electrode side connecting portion (65b) may close the right side (positive direction of the Y-axis) side portion of the space provided between a pair of negative electrode side base portions (61b).

[0102] Due to this, the structural stability of the connector (50) can be increased by connecting a pair of negative-side base portions (61b) to each other. In addition, the negative lead (44) inserted into a pair of negative-side base portions (61b) can be prevented from falling out to the right (positive direction of the Y-axis).

[0103] Meanwhile, referring to FIG. 8, a hook assembly groove (66) may be formed recessed in the positive side connection portion (65a) of the connector (50) according to one embodiment of the present invention. The hook assembly groove (66) may be a groove into which a hook assembly (80) described later is installed.

[0104] At this time, in the present embodiment, the engaging assembly groove (66) may be formed on a surface facing between the positive electrode side connecting portion (65a) and the positive electrode side base portion (61a). The engaging assembly groove (66) may be configured in multiple numbers. The multiple engaging assembly grooves (66) may be spaced apart in the vertical direction (Z-axis direction), which is the extension direction of the positive electrode lead (42).

[0105] According to the present embodiment, a catch assembly groove may be formed in the negative electrode side connecting portion (65b). At this time, the catch assembly groove formed in the negative electrode side connecting portion (65b) may be configured similarly to the catch assembly groove (66) formed in the positive electrode side connecting portion (65a) described above.

[0106] Referring to FIGS. 3 to 5, a connector (50) according to one embodiment of the present invention may include a current-conducting assembly (70). The current-conducting assembly (70) may be an assembly for conducting current between electrode leads (42, 44) of a battery cell (40) and the outside.

[0107] Referring to FIG. 5, the current-conducting assembly (70) in the present embodiment may include a contact member (71). The contact member (71) may be a member that directly contacts and is electrically connected to the electrode leads (42, 44). For this purpose, the contact member (71) may be made of a conductive material.

[0108] In this embodiment, at least a portion of the contact member (71) can be inserted into the contact member hole (63) of the base portion (61). The contact member (71) can be movably coupled to the contact member hole (63).

[0109] And, in this embodiment, at least a portion of the contact member (71) may be convexly protruded in a direction from the contact member hole (63) toward the lead surface (62) (or toward the space provided between a pair of base parts (61)). As an example, the contact member (71) may have a spherical shape, but is not limited thereto.

[0110] At this time, in the present embodiment, the contact member (71) may have a diameter larger than the opening of the contact member hole (63) formed on the lead surface (62). Accordingly, at least a portion of the contact member (71) can move within the contact member hole (63), while the contact member (71) can be prevented from falling out of the contact member hole (63) and onto the lead surface (62).

[0111] In this embodiment, the electrically conductive assembly (70) may include a bearing member (72). The bearing member (72) may be configured to support the contact member (71) so that it can rotate (or roll).

[0112] In this embodiment, the bearing member (72) may include a bearing portion (73). The bearing portion (73) may be a member surrounding a portion of the contact member (71). In this case, the portion of the contact member (71) may be a portion located away from the lead surface (62).

[0113] At this time, the bearing portion (73) may be provided with a concave groove so that a portion of the contact member (71) can enter therein. In addition, a plurality of bearing balls (B) may be provided on the inside of the groove. The bearing balls (B) are interposed between the inner wall of the groove and the outer surface of the contact member (71), thereby supporting the contact member (71) so as to be able to rotate.

[0114] In this embodiment, the bearing member (72) may further include a load portion (74). The load portion (74) may extend from the bearing portion (73). As an example, as illustrated, the load portion (74) may extend in a vertical direction from the lead surface (62).

[0115] An elastic member (75) described later can be combined with a load member (74) of this type. The extension direction of the load member (74) can be appropriately changed in consideration of the direction in which the elastic member (75) elastically supports the bearing member (72).

[0116] Referring again to FIG. 5, the conductive assembly (70) of the connector according to one embodiment of the present invention may include a guide portion (76). The guide portion (76) may be configured to guide the movement of the bearing member (72) and the contact member (71) supported thereby.

[0117] In this embodiment, the guide portion (76) may be provided as a hollow member. The guide portion (76) may extend in a direction away from the base portion (61) toward the lead surface (62). The aforementioned bearing member (72) and the contact member (71) supported by the bearing member (72) may be movably inserted into the hollow guide portion (76).

[0118] Due to this, the bearing member (72) and the contact member (71) supported by it can be moved in a direction away from or closer to the lead surface (62) along the extension direction of the guide member (76). Meanwhile, the structure or shape of the guide member (76) is not particularly limited as long as it can guide the movement direction of the contact member (71).

[0119] In this embodiment, the electrically conductive assembly (70) may include an elastic member support portion (77). The elastic member support portion (77) may be configured to support an elastic member (75) described later. The elastic member support portion (77) may be provided on the end portion side of the guide portion (76) in the extension direction. The elastic member support portion (77) may cover at least a portion of the end portion of the guide portion (76).

[0120] In this embodiment, the electrically conductive assembly (70) may include an elastic member (75). The elastic member (75) may be a member for elastically supporting the contact member (71) toward the lead surface (62). As an example, the elastic member (75) may be a compression spring penetratingly coupled to the load portion (74), but is not limited thereto.

[0121] In this embodiment, the elastic member (75) may be interposed between the bearing member (72) and the elastic member support member (77). One side of the elastic member (75) may be supported by the elastic member support member (77), and the other side of the elastic member (75) may press the bearing member (72).

[0122] Through this, the elastic member (75) can elastically support the bearing member (72) and the contact member (71) supported by it in a direction closer to the lead surface (62) based on the support force of the elastic member support portion (77). This may be to bring the contact member (71) and the electrode leads (42, 44) into contact with each other.

[0123] Hereinafter, a process of electrically connecting a battery cell to another configuration using a connector according to an embodiment of the present invention is described using different drawings.

[0124] Referring to FIGS. 6 and 7, the connector (50) and the battery cell (40) can be arranged parallel to each other. In addition, the electrode leads (42, 44) of the battery cell (40) can be inserted between a pair of base portions (61).

[0125] As the electrode leads (42, 44) are inserted between a pair of base parts (61), one surface of the electrode leads (42, 44) can come into contact with the contact member (71) of the current-conducting assembly (70). At this time, since the contact member (71) is rotatably supported by the bearing member (72), the contact member (71) can roll on the outer surface of the electrode leads (42, 44).

[0126] Due to this, friction occurring between the contact member (71) and the electrode leads (42, 44) during the process of inserting the electrode leads (42, 44) between a pair of base parts (61) can be minimized.

[0127] Meanwhile, as the electrode leads (42, 44) are inserted between a pair of base parts (61) and occupy the space therebetween, the contact member (71) can be pushed away from the lead surface (62).

[0128] At this time, since the elastic member (75) elastically supports the base member (72) and the contact member (71) supported by it toward the lead surface (62), the contact member (71) can maintain contact with the electrode leads (42, 44) interposed between a pair of base parts (61). Through this, the contact member (71) and the electrode leads (42, 44) can conduct electricity to each other.

[0129] Additionally, a predetermined frictional force can be applied between the contact member (71) and the electrode leads (42, 44) due to the elastic support force of the elastic member (75). Through this, the connection between the connector (50) and the battery cell (40) can be maintained.

[0130] As described above, the conductive assembly (70) and the electrode leads (42, 44) can be electrically connected to each other by the contact member (71). When the connecting member (14) (illustrated in FIG. 1) is electrically connected to the conductive assembly (70), the battery cell (40) can be electrically connected to other external components without using a welding process.

[0131] At this time, the electrically conductive assembly (70) may also be electrically connected to the base portion (61) and / or the connecting portion (65). For this purpose, the base portion (61) or the connecting portion (65) may be made of a conductive material. In this case, as illustrated in FIG. 2, the connecting member (14) is electrically connected to the base portion (61) or the connecting portion (65), thereby achieving an electrical connection between the battery cell (40) and the outside.

[0132] In this way, in this embodiment, the electrode leads (42, 44) mounted on the lead surface (62) and the contact member (71) elastically supported toward the lead surface (62) come into contact with each other, so that the connector (50) and the battery cell (40) can be coupled and energized with each other.

[0133] Due to this, the connector (50) can electrically connect the battery cell (40) to another external component without a welding process. That is, the battery cell (40) and the connector (50) can be detachably coupled and energized (or uncoupled and deenergized).

[0134] Here, being able to be removably connected and energized (or, uncoupled and de-energized) may mean that a worker can connect and energize (or, uncouple and de-energize) manually or with a simple tool. Here, a simple tool may mean a screwdriver, drill, wrench, etc.

[0135] Referring again to FIG. 3, the connector (50) according to one embodiment of the present invention may be configured with a plurality of conductive assemblies (70). Some of the plurality of conductive assemblies (70) may be provided on the positive electrode base portion (61a), and the remaining some may be provided on the negative electrode base portion (61b). As a result, the positive electrode lead (42) and the negative electrode lead (44) may each be electrically connected to the outside.

[0136] Hereinafter, the current-conducting assembly (70) provided on the positive electrode base portion (61a) is referred to as the positive electrode current-conducting assembly (70a), and the current-conducting assembly (70) provided on the negative electrode base portion (61b) is referred to as the negative electrode current-conducting assembly (70b).

[0137] In this embodiment, a plurality of positive electrode side current-conducting assemblies (70a) can be spaced apart along the left-right direction (Y-axis direction) that is the extension direction of the positive electrode side base portion (61a). As a result, the contact area between the positive electrode lead (42) and the plurality of contact members (71) is increased, so that the connector (50) and the battery cell (40) can be stably coupled and current-conducted.

[0138] At this time, as illustrated, some of the plurality of positive-side current-carrying assemblies (70a) may be provided on one of the pair of positive-side base portions (61a), and the remaining some of the plurality of positive-side current-carrying assemblies (70a) may be provided on the other of the pair of positive-side base portions (61a).

[0139] This may be to ensure that both sides of the positive lead (42) are pressed by the contact members (71) facing each other, thereby achieving more stable current conduction and coupling between the connector (50) and the battery cell (40).

[0140] At this time, the plurality of positive electrode side current-carrying assemblies (70a) can be arranged so that a pair of positive electrode side base parts (61a) are spaced apart from each other in the front-back direction (X-axis direction). Through this, it is possible to prevent a local portion of the positive electrode lead (42) from being subjected to excessive force by the plurality of contact members (71).

[0141] Meanwhile, in this embodiment, similar to the plurality of positive-side current-carrying assemblies (70a), the plurality of negative-side current-carrying assemblies (70b) can also be spaced apart along the left-right direction (Y-axis direction) which is the extension direction of the negative-side base portion (61a).

[0142] And, as illustrated, some of the plurality of negative-side current-conducting assemblies (70b) may be provided on one of the pair of negative-side base portions (61b), and the remaining some of the plurality of negative-side current-conducting assemblies (70b) may be provided on the other of the pair of negative-side base portions (61b). At this time, the plurality of negative-side current-conducting assemblies (70b) may be arranged to be misaligned with each other in the front-back direction (X-axis direction), which is the direction in which the pair of negative-side base portions (61b) are spaced from each other.

[0143] Referring again to FIG. 8, a connector (50) according to one embodiment of the present invention may include a latching assembly (80). The latching assembly (80) may be an assembly for supplementing the coupling between the connector (50) and the battery cell (40).

[0144] In this embodiment, the hook assembly (80) is configured in multiple pieces and can be installed in the hook assembly groove (66) of the positive electrode side connecting portion (65a) and the hook assembly groove of the negative electrode side connecting portion (65b), respectively.

[0145] In this embodiment, the hook assembly (80) may include a hook member (81) and an elastic support (82). The hook member (81) may be configured to be movable from the connecting portion (65) onto the lead surface (62) of the base portion (61). In other words, the hook member (81) may be configured to be movable from the connecting portion (65) to a space provided between a pair of base portions (61).

[0146] Through this, at least a portion of the catch member (81) can be inserted into the catch groove (43, 45) of the electrode lead (42, 44). Accordingly, the bonding force between the connector (50) and the electrode lead (42, 44) can be reinforced.

[0147] Meanwhile, in the present embodiment, an elastic support (82) may be interposed between the bottom surface of the engaging assembly groove (66) and the engaging member (81). One side of the elastic support (82) is supported by the bottom surface of the engaging assembly groove (66), and the other side may press the engaging member (81).

[0148] At this time, the elastic support (82) can press the catch member (81) onto the lead surface (62) of the base portion (61). In other words, the elastic support (82) can press the catch member (81) between the pair of base portions (61). Through this, the catch member (81) can be moved toward the electrode leads (42, 44) interposed between the pair of base portions (61) and inserted and coupled into the catch grooves (43, 45).

[0149] Referring again to FIG. 1, as previously described, a connector (50) according to one embodiment of the present invention can electrically connect a battery cell (40) to other components without a welding process. In other words, the battery cell (40) can be detachably connected to and coupled with other components (or disconnected from and decoupled from) by the connector (50).

[0150] Accordingly, since a welding process for connecting the battery cells (40) is not required, the manufacturing process of the battery module (1) can be simplified. Furthermore, in the battery module (1) according to one embodiment of the present invention, a specific battery cell (40) among several battery cells (40) can be selectively and easily separated, so maintenance costs can be reduced.

[0151] Below, a battery module according to another embodiment of the present invention is described using different drawings.

[0152] FIG. 9 is a horizontal cross-sectional view of a plurality of battery assemblies included in a battery module according to another embodiment of the present invention.

[0153] Referring to FIG. 9, a battery module according to another embodiment of the present invention may further include an insulating member (20). The insulating member (20) may be a plate, frame, or block-shaped member made of an insulating material. The insulating member (20) may be configured to prevent unexpected short circuits between battery assemblies (30).

[0154] In the present embodiment, an insulating member (20) may be interposed between adjacent battery assemblies (30). More specifically, as illustrated, an insulating member (20) may be interposed between adjacent first battery assemblies (30a) and second battery assemblies (30b), and another insulating member (20) may be interposed between adjacent second battery assemblies (30b) and third battery assemblies (30c). Accordingly, insulation between adjacent battery assemblies (30) may be secured.

[0155] At this time, the insulating member (20) can be in contact with the base members (61, 64, 65) of the adjacent battery assemblies (30), respectively. As a result, the adjacent battery assemblies (30) can be brought into close contact with each other as much as possible without the risk of unexpected short circuit, thereby further improving the energy density of the battery module (1).

[0156] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and various embodiments are possible within the scope equivalent to the technical idea of ​​the present invention and the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0157] [Explanation of symbols]

[0158] 1: Battery module

[0159] 20: Insulating member

[0160] 30: Battery assembly

[0161] 40: Battery cell

[0162] 50: Connector

[0163] 60: Base absence

[0164] 70: Assembly for transmission

[0165] 80: Hook assembly

Claims

1. As a connector for battery cells to electrically connect the battery cells to the outside, A base member having a lead surface on which an electrode lead of a battery cell can be placed; and A conductive assembly is included that is coupled to the base member and can be electrically connected to an electrode lead placed on the lead surface. The above-mentioned electrical assembly is, a conductive contact member movably coupled to the base member such that at least a portion of the conductive contact member can protrude onto the lead surface of the base member; and A connector comprising an elastic member that elastically supports the contact member toward the lead surface of the base member.

2. In paragraph 1, A connector wherein at least a portion of the contact member is formed convexly in a direction perpendicular to the lead surface.

3. In paragraph 2, In the above base member, a hole for a contact member is formed that is opened on the lead surface, A connector in which the contact member protrudes onto the lead surface through the hole for the contact member.

4. In paragraph 3, A connector in which the opening of the hole for the contact member formed on the lead surface has a diameter smaller than that of the contact member.

5. In paragraph 4, A connector in which the hole for the contact member has a diameter that increases as it moves away from the lead surface.

6. In paragraph 2, The above contact member is a connector having a spherical shape.

7. In paragraph 6, The above-mentioned electrical assembly is, Further comprising a bearing member that supports the above contact member so that it can move in a cloud, The above elastic member is a connector that elastically supports the bearing member.

8. In paragraph 7, The above bearing member, A bearing portion supporting the above contact member; and including a load portion extending away from the bearing portion in a direction away from the contact member; A connector in which the elastic member is formed of a spring inserted through the load section.

9. In paragraph 7, The above-mentioned electrical assembly is, Further comprising a guide portion extending away from the lead surface from the base member, A connector in which the bearing member is provided to be guided by the guide portion.

10. In paragraph 1, A connector in which the base member is made of a conductive material so as to be electrically connected to the above-mentioned power-conducting assembly.

11. In paragraph 1, The above base member is, A positive electrode base portion having a positive electrode lead surface on which a positive electrode lead can be placed; and Includes a negative side base portion having a negative lead surface on which a negative lead can be placed, The above-mentioned electrical assembly is, An anode-side current-carrying assembly coupled to the anode-side base portion; and A connector comprising a negative side current-carrying assembly coupled to the negative side base portion.

12. In paragraph 11, The above base member is, A connector further comprising an insulating portion interposed between the positive electrode base portion and the negative electrode base portion.

13. In paragraph 1, The above base member is, A pair of base portions spaced apart at a predetermined distance between which electrode leads of a battery cell can be inserted; and Including a connecting portion connecting the pair of base portions so that they support each other, A connector in which the above lead surfaces are provided in pairs and formed on each of the pair of base portions, but are arranged to face each other.

14. In paragraph 13, The above-mentioned power supply assembly is provided in multiple units, A connector wherein some of the above plurality of conductive assemblies are coupled to one of the pair of base portions, and others are coupled to the other of the pair of base portions.

15. In paragraph 14, A connector in which the above plurality of conductive assemblies are arranged so as to be offset from each other in a direction in which the pair of base portions are spaced apart.

16. In paragraph 1, A connector further comprising a catch member that can be moved onto the lead surface so as to catch an electrode lead placed on the lead surface.

17. In paragraph 16, The above base member is, A base portion extending in one direction and having a lead surface on the side, The above-mentioned power assembly is provided in multiple pieces and arranged along the direction in which the base portion extends, A connector in which the above-mentioned hook member is provided in multiple pieces and arranged in a direction perpendicular to the direction in which the base portion extends.

18. A battery cell comprising a cell body having an electrode assembly and an electrode lead electrically connected to the electrode assembly and extending outwardly of the cell body; and Includes a connector for electrically connecting the battery cell to the outside, The above connector, A base member having a lead surface on which the electrode lead is placed; and A conductive assembly is included that is coupled to the base member and can be electrically connected to the electrode lead placed on the lead surface, The above-mentioned electrical assembly is, a conductive contact member movably coupled to the base member such that at least a portion of the conductive contact member can protrude onto the lead surface of the base member; and Including an elastic member that elastically supports the contact member toward the lead surface of the base member, A battery assembly wherein the electrode leads of the above battery cells and the contact member are electrically connected to each other.

19. Housing; A plurality of battery assemblies arranged in a row and accommodated in the housing, The above battery assembly, A battery cell comprising a cell body having an electrode assembly and an electrode lead electrically connected to the electrode assembly and extending outwardly of the cell body; and Includes a connector for electrically connecting the battery cell to the outside, The above connector, A base member having a lead surface on which the electrode lead is placed; and A conductive assembly is included that is coupled to the base member and can be electrically connected to the electrode lead placed on the lead surface, The above-mentioned electrical assembly is, a conductive contact member movably coupled to the base member such that at least a portion of the conductive contact member can protrude onto the lead surface of the base member; and A battery module comprising an elastic member that elastically supports the contact member toward the lead surface of the base member.

20. In paragraph 19, Including an insulating member interposed between each of the plurality of battery assemblies, A battery module wherein the insulating member is in contact with the base member of each of the plurality of battery assemblies.

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