Battery assembly

Abstract

The present invention provides battery assemblies with improved physical or electrical stability, improved lifespan, and / or reduced manufacturing costs in the manufacturing process. [Solution] The present invention relates to a battery assembly comprising a plurality of battery cells arranged along the stacking direction, a housing case for housing the plurality of battery cells, bus bars located on the sides of the plurality of battery cells inside the housing case and arranged along the stacking direction, bus bar terminals located inside the housing case that protrude from the bus bars and are bent to surround at least a portion of the plurality of battery cells, and a circuit section arranged in the same plane as one bent end of the bus bar terminals and electrically connected to the bus bar terminals.

Description

Technical Field

[0001] The present disclosure relates to a battery assembly.

Background Art

[0002] A secondary battery is a battery that stores electrical energy by converting it into chemical energy and can be reused multiple times through charging and discharging. Secondary batteries are widely used in various industries due to their economic and environmentally friendly characteristics. In particular, lithium secondary batteries among secondary batteries are widely used in the entire industry, including portable devices that require high-density energy.

[0003] On the other hand, in order to increase the capacity and output of secondary batteries, multiple batteries can be bundled and used. A bus bar can be used to electrically connect each secondary battery. A battery assembly can be provided with a sensing circuit that acquires information related to the secondary battery via a bus bar connected to the secondary battery. At this time, there is a risk that the terminal connecting the sensing circuit and the bus bar is vulnerable to damage, and a structure and shape of the sensing circuit and the bus bar for preventing this are required. Therefore, research on the structure and shape of the sensing circuit and the bus bar is actively underway.

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to one aspect of the present disclosure, the problem to be solved is to improve the physical or electrical stability of the battery assembly.

[0005] According to another aspect of the present disclosure, the problem to be solved is to improve the lifespan of the battery assembly.

[0006] According to still another aspect of the present disclosure, the problem to be solved is to reduce the manufacturing cost of the manufacturing process of the battery assembly.

[0007] On the other hand, this disclosure can be broadly applied to green technology fields such as electric vehicles, battery charging stations, energy storage systems (ESS), and other battery-powered solar and wind power generation. Furthermore, this disclosure can be used in eco-friendly mobility, including electric and hybrid vehicles, to curb air pollution and greenhouse gas emissions and prevent climate change. [Means for solving the problem]

[0008] The battery assembly according to this disclosure includes: a plurality of battery cells arranged along the stacking direction; a housing case for housing the plurality of battery cells; bus bars located on the sides of the plurality of battery cells inside the housing case and arranged along the stacking direction; bus bar terminals located inside the housing case, protruding from the bus bars and bent to surround at least a portion of the plurality of battery cells; and a circuit portion arranged on the same plane as one bent end of the bus bar terminals and electrically connected to the bus bar terminals.

[0009] The bent end of the busbar terminal can be positioned between the housing case and the plurality of battery cells, with respect to the height direction of the housing case.

[0010] The circuit portion may include a sensing terminal portion that contacts one end of the bent busbar terminal portion.

[0011] The sensing terminal portion may include one end positioned on the circuit portion and the other end extending in a direction toward the bent busbar terminal portion from the one end.

[0012] The other end of the sensing terminal portion can be positioned on the one end of the bent busbar terminal portion.

[0013] The busbar may include one or more busbar plates, each containing a busbar terminal portion.

[0014] The one or more busbar plates can be arranged along the stacking direction.

[0015] The system further includes a busbar frame positioned on the sides of the plurality of battery cells, with at least a portion of which is plate-shaped and extending along the stacking direction, wherein the busbar can be supported by the busbar frame.

[0016] The busbar frame further includes a circuit frame that surrounds at least a portion of the plurality of battery cells and is connected to the busbar frame, and the busbar frame may include a support portion on which the circuit frame is positioned and which covers a portion of the upper surface of the plurality of battery cells.

[0017] The circuit section may include a substrate section arranged on the circuit section frame.

[0018] The circuit frame and at least a portion of the substrate may be included as a first coupling portion that maintains a state in which they are coupled to each other.

[0019] It may include a second coupling portion for fixing at least a part of the busbar frame and the circuit section.

[0020] The second coupling portion can be formed by fusing together a first sub-coupling portion arranged on the busbar frame and a second sub-coupling portion arranged on the circuit frame.

[0021] The busbar terminal can be electrically connected to at least one of the plurality of battery cells.

[0022] The circuit unit can transmit information of the plurality of battery cells via the bus bar terminal unit.

Brief Description of the Drawings

[0023] [Figure 1] It is a diagram showing a battery assembly according to an embodiment of the present disclosure. [Figure 2] It is a diagram showing a battery cell according to an embodiment of the present disclosure. [Figure 3] It is a diagram showing an embodiment before a bus bar and a bus bar frame according to the present disclosure are coupled to a circuit unit frame. [Figure 4] It is a diagram showing an embodiment after a bus bar and a bus bar frame according to the present disclosure are coupled to a circuit unit frame. [Figure 5] It is a diagram specifically showing the first region of FIG. 4. [Figure 6] It is a diagram schematically showing a cross-sectional view of a bus bar assembly along line AA' of FIG. 4.

Modes for Carrying Out the Invention

[0024] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The configurations and control methods of the devices described below are for explaining the embodiments of the present disclosure and are not for limiting the scope of rights of the present disclosure. Reference numerals used consistently throughout the specification indicate the same components.

[0025] The use of terms preceded by expressions such as 'first, second, third' for the components referred to below is only to avoid confusion of the components being referred to and has nothing to do with the order, importance, or primary-secondary relationship between the components. For example, an invention including only the second component without the first component is also realizable.

[0026] To explain this disclosure, the following explanation will be based on a spatial orthogonal coordinate system with mutually orthogonal X, Y, and Z axes. Each axis direction (X-axis direction, Y-axis direction, Z-axis direction) refers to both directions in which each axis extends.

[0027] In this disclosure, the X direction may be the protruding direction of the cell tab 120, the Y direction may be the stacking direction of the battery cells 100, and the Z direction may be the height direction of the housing case 200. However, the X, Y, and Z directions referred to below are for illustrative purposes to ensure that this disclosure is clearly understood, and it goes without saying that each direction may be defined differently depending on where the reference point is set.

[0028] As used in this disclosure, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0029] On the other hand, in this disclosure, the terms battery, secondary battery, or cell are used interchangeably with the term battery cell.

[0030] Figure 1 shows a battery assembly according to one embodiment of the present disclosure. Figure 2 shows a battery cell according to one embodiment of the present disclosure.

[0031] Referring to Figure 1, the battery assembly 10 of this disclosure includes a plurality of battery cells 100. The battery cells 100 described herein mean rechargeable batteries that can be repeatedly used by charging and discharging electrical energy. For example, they may mean, but are not limited to, lithium-ion batteries or lithium-ion batteries. Another example is a solid-state battery.

[0032] The battery cell 100 can be classified into pouch-type secondary batteries, prismatic secondary batteries, or cylindrical secondary batteries depending on its shape. Referring to Figure 2, a pouch-type secondary battery is shown as an example in this specification for convenience of explanation, but it is not limited to this.

[0033] On the other hand, the battery assembly 10 described herein refers to a battery module in which one or more battery cells 100 are grouped together and placed in a case to protect them from external shocks, heat, vibrations, etc., and to have high output and high capacity characteristics.

[0034] The battery cell 100 may include a positive electrode and a negative electrode. The positive electrode may include a positive electrode active material that allows lithium ions to be inserted into and removed from it. The negative electrode may include a negative electrode active material that allows lithium ions to be inserted into and removed from it. The battery cell 100 may further include a separation membrane to prevent electrical short circuits between the positive and negative electrodes and to allow ion flow.

[0035] In one embodiment, a positive electrode, a negative electrode, and a separator membrane can be stacked to form an electrode assembly. Depending on the method of stacking the positive electrode, negative electrode, and separator membrane, the electrode assembly can be classified into stacking, winding, stack-folding, and Z-stacking types. The battery cell 100 of this disclosure is not limited to any one stacking method and may include electrode assemblies stacked in various ways. In other words, the battery cell 100 of this disclosure may include electrode assemblies stacked in various ways to store and supply electrical energy.

[0036] Referring to Figure 2, the battery cell 100 may further include an outer casing 110 that houses the electrode assembly. The electrode assembly and electrolyte can be housed inside the outer casing 110. The outer casing 110 may comprise an outer insulating layer and an inner adhesive layer made of polymer material, and a metal layer interposed between the outer insulating layer and the inner adhesive layer. The outer casing 110 may include a material with high mechanical rigidity to protect the battery cell 100 from external impacts. For example, the case may include an aluminum layer.

[0037] The battery cell 100 may further include cell tabs 120 that protrude from the exterior of the casing material 110 for electrical connection to the outside. The cell tabs 120 can be connected to the positive and negative electrodes of the battery cell 100, respectively. The cell tabs 120 may include a positive electrode tab 121 connected to the positive electrode and a negative electrode tab 122 connected to the negative electrode.

[0038] Multiple battery cells 100 can be stacked along one direction. Referring to Figure 1, multiple battery cells 100 can be stacked sequentially along the Y direction. This allows for improved energy density through a structure that minimizes wasted space.

[0039] The battery assembly 10 of this disclosure includes a housing case 200 that houses a plurality of battery cells 100. The housing case 200 can house the battery cells 100 inside. The housing case 200 can prevent damage to the battery cells 100 from external shocks, heat, vibrations, or pressure.

[0040] The housing case 200 may include a support body 210 that supports multiple battery cells 100 and a cover body 220 that is connected to the support body 210 and covers the multiple battery cells 100. In this embodiment, the support body 210 and the cover body 220 can be connected to form a hexahedral shape with an open front and rear. This maximizes the energy density of the battery assembly 10.

[0041] Referring to Figure 1, the support body 210 may include an opening 211 that is open toward the top. In this embodiment, the support body 210 may include an opening 211 that is open toward the Y direction. Multiple battery cells 100 can be positioned on the support body 210 through the opening 211. The support body 210 may include side bodies formed with edges that extend toward the top to cover multiple battery cells 100. In this embodiment, the support body 210 may be formed in a "U" shape.

[0042] The cover body 220 can be coupled with the support body 210. The cover body 220 can be coupled with the support body 210 to form an inner surface of the internal space of the housing case 200. The housing case 200 may further include an end cover 230. The end cover 230 can be coupled with the support body 210 and the cover body 220 to form one side of the internal space of the housing case 200. As a result, the housing case 200 is formed in a hexahedral shape by the support body 210, the cover body 220 and the end cover 230, and can protect the battery cell 100.

[0043] The battery assembly 10 of this disclosure may include a busbar assembly 300. The busbar assembly 300 can electrically connect at least some of a plurality of battery cells 100.

[0044] The busbar assembly 300 may include a busbar frame 310, a busbar 320, and a busbar circuit frame 330.

[0045] The busbar frame 310 can cover multiple battery cells 100 in the direction of the protrusion of the cell tabs 120. Referring to Figure 1, the busbar frame 310 can be located outside the multiple battery cells 100 along the X direction. The busbar frame 310 can also extend along the direction in which the multiple battery cells 100 are stacked. This allows the busbar frame 310 to easily and efficiently contact at least some of the multiple battery cells 100.

[0046] The busbar 320 can be connected to the busbar frame 310. The busbar frame 310 can be positioned between the busbar 320 and the multiple battery cells 100. This allows for the protection of the multiple battery cells 100.

[0047] Furthermore, each cell tab 120 contained within a plurality of battery cells 100 can be inserted into the busbar frame 310. For this reason, the busbar frame 310 can be formed with a through-hole or slit to allow the cell tab 120 to be inserted. For example, the busbar frame 310 may include through-holes or slits.

[0048] According to the embodiment, the busbar frame 310 is positioned on the side of the battery cell 100 and extends along the stacking direction of the battery cell 100, and at least a portion of it may be plate-shaped. However, this is illustrative, and the structure of the busbar frame 310 is not particularly limited, and known configurations can be applied.

[0049] The busbar 320 can be supported by the busbar frame 310. For example, the busbar 320 can be connected (or coupled) to the busbar frame 310 on one side that does not face multiple battery cells 100. However, this is illustrative, and the busbar 320 may be formed as a single unit.

[0050] The busbar 320 is located on the sides of the multiple battery cells 100 (see Figure 1) inside the housing case 200 and can be arranged along the stacking direction of the multiple battery cells 100.

[0051] Multiple busbars 320 can be formed. Multiple busbars 320 can be arranged along the stacking direction of the battery cells 100. For example, a busbar 320 may include one or more busbar plates 321 (see Figure 3). In this case, one or more busbar plates 321 can be arranged along the stacking direction of the battery cells 100.

[0052] The cell tab 120 is inserted into a through-hole in the busbar frame 310, with a portion of it protruding outwards. The protruding cell tab 120 can be electrically connected to the busbar 320 (or busbar plate 321).

[0053] The battery assembly 10 of this disclosure may further include a circuit frame 330 and a circuit section 400.

[0054] The circuit frame 330 can enclose at least a portion of the multiple battery cells 100 and can be connected to the busbar frame 310. The circuit frame 330 can extend along the protruding direction of the cell tabs 120. For example, the circuit frame 330 can extend along the X direction. The circuit frame 330 can be connected to the busbar frame 310 and busbar 320 located on both sides of the multiple battery cells 100.

[0055] According to the embodiment, the busbar frame 310, busbar 320, and circuit frame 330 can be assembled to form a busbar assembly 300. For example, after the busbar frame 310 and busbar 320 are assembled, the integrally configured busbar frame 310 and busbar 320 can be joined to the circuit frame 330 to form a busbar assembly 300.

[0056] The circuit unit 400 can be placed on the circuit unit frame 330. For example, the circuit unit frame 330 can be placed between the circuit unit 400 and the battery cell 100.

[0057] In this embodiment, the circuit unit 400 is electrically connected to the busbar assembly 300 and can acquire information from at least one of the multiple battery cells 100. For example, the circuit unit 400 can receive information from multiple battery cells 100 via the busbar 320 or the busbar terminal 322 (see Figure 5).

[0058] The information of battery cell 100 can be information for controlling and managing battery cell 100. For example, the information of battery cell 100 can be information regarding the voltage, current, remaining capacity, temperature, and humidity of battery cell 100. Alternatively, the information of battery cell 100 can be the charge information (State of Charge) of battery cell 100. However, this is illustrative and not limited to the information of battery cell 100.

[0059] According to the embodiment, the circuit unit 400 may include a management system for the battery cells 100. In other words, the circuit unit 400 may include a management system for the battery cells 100 that communicates with the outside to efficiently control a plurality of battery cells 100. According to the embodiment, the management system for the battery cells 100 may be implemented by wireless communication, but is not limited thereto.

[0060] Figure 3 shows an embodiment of the busbar and busbar frame according to this disclosure before they are coupled to the circuit frame. Figure 4 shows an embodiment of the busbar and busbar frame according to this disclosure after they have been coupled to the circuit frame. Figure 5 is a diagram specifically showing the first region of Figure 4.

[0061] Referring to Figure 3, the busbar frame 310 may include a support portion 311 and a first sub-connecting portion 312. The busbar 320 may include a busbar plate 321 and a busbar terminal portion 322. The circuit frame 330 may include a first connecting portion 331 and a second sub-connecting portion 331.

[0062] The busbar frame 310 may include support portions 311 that cover a portion of the upper surface of multiple battery cells 100 (see Figure 1). For example, the busbar frame 310 may have an L-shape inverted in the Y direction. In this case, the support portions 311 may be configured in the x direction of the busbar frame 310.

[0063] The support portion 311 can be the upper surface of the busbar frame 310 to which the circuit frame 330 is attached. This allows the support portion 311 to contact at least a part of the circuit frame 330. For example, the support portion 311 can contact the back surface of the circuit frame 330.

[0064] The first sub-connector 312 can be provided to maintain a state in which the busbar frame 310 and at least a portion of the circuit section 400 are connected. Similarly, the second sub-connector 332 can be provided to maintain a state in which the busbar frame 310 and at least a portion of the circuit section 400 are connected. Referring to Figures 3 and 4, the first sub-connector 312 located on the busbar frame 310 and the second sub-connector 332 located on the circuit section frame 330 can come into contact with each other and be fused together. This allows for the formation of a second connector 510 that fixes the busbar frame 310 and at least a portion of the circuit section 400. In other words, during the process of connecting the busbar frame 310 and the circuit section frame 330, the first sub-connector 312 and the second sub-connector 332 can be fused together and converted into a single structure. The resulting second connector 510 allows the busbar frame 310, the circuit section frame 330, and the circuit section 400 to maintain a stable connection. According to the embodiment, the first sub-joint 312 and the second sub-joint 332 can be fused together by applying heat, but the fusion method is not limited thereto.

[0065] The busbar 320 may include one or more busbar plates 321, each containing a busbar terminal portion 322. For example, the busbar plates 321 may consist of multiple plates, each containing a busbar terminal portion 322. However, it is not limited to this. According to one embodiment, the busbar plate 321 may consist of a single plate and contain multiple busbar terminal portions 322.

[0066] One or more busbar plates 321 can be electrically connected to a battery cell 100 (see Figure 1). For example, one or more busbar plates 321 can be in contact with at least a portion of the cell tabs 120 (see Figure 2) of the battery cell 100. This allows the busbar plates 321 to be electrically connected to the battery cell 100 via the cell tabs 120.

[0067] Within the housing case 200, the busbar terminal portion 322 can be bent to protrude from the busbar 320 and surround at least a portion of the multiple battery cells 100. For example, the busbar terminal portion 322 can extend in the Z direction from the busbar plate 321 and surround at least a portion of the multiple battery cells 100.

[0068] At least a portion of the circuit frame 330 can be positioned on the support portion 311. For example, at least a portion of the circuit frame 330 can be positioned so as to overlap a portion of the support portion 311 and the housing case 200 (see Figure 1) in the height direction.

[0069] The substrate portion 410 can be placed on the circuit frame 330. For example, the substrate portion 410 can be fixed or mounted on at least a portion of the circuit frame 330. This allows the circuit frame 330 to support the substrate portion 410 in the Z direction.

[0070] On the other hand, for the sake of explanation, only at least a portion of the configuration of the circuit frame 330 is shown in Figure 3. Therefore, the shape of the circuit frame 330 is not limited to that shown in Figure 3.

[0071] Referring to Figures 3 to 5, the circuit frame 330 may include the first coupling portion 331. For example, referring to the first region A1 in Figures 4 and 5, the first coupling portion 331 can be one of the components located on the upper surface of the circuit frame 330.

[0072] The first joint 331 can maintain a state in which at least a portion of the circuit frame 330 and the substrate 410 are joined to each other. For example, the first joint 331 can be configured to maintain a state in which the circuit frame 330 and the substrate 410 are joined to each other after the substrate 410 has been placed on the circuit frame 330. According to the embodiment, the first joint 331 can be formed by fusing the components of the circuit frame 330 and the substrate 410, respectively. However, it is not limited to this.

[0073] The circuit frame 330 may include a second sub-connector 332 disposed on the circuit frame 330. As described above, the second sub-connector 332 can be connected to the first sub-connector 312. This allows the first sub-connector 312 and the second sub-connector 332 to be connected to form the second connector 510.

[0074] Referring to Figure 5, the circuit frame 330 may include a fixing portion 334. The fixing portion 334 can be positioned on the circuit frame 330. For example, referring to the first region A1 in Figures 4 and 5, the fixing portion 334 may be configured to protrude from the circuit frame 330 in the height direction (e.g., the Z direction) of the housing case 200 (see Figure 1).

[0075] The fixing portion 334 can stably fix the sensing terminal portion 420. For example, it can have an opening in the sensing terminal portion 420. In this case, the opening in the sensing terminal portion 420 can be inserted into the fixing portion 334. As a result, the sensing terminal portion 420 can be fixed by the fixing portion 334 and stably maintain contact with the busbar terminal portion 322.

[0076] The circuit section 400 may include a circuit board section 410, a sensing terminal section 420, and an input / output section 430.

[0077] The substrate portion 410 can be placed on the circuit frame 330. On a plane, the substrate portion 410 can have a shape corresponding to the shape of the circuit frame 330. According to the embodiment, the substrate portion 410 can have the same or smaller area as the circuit frame 330 on a plane viewed from the opposite direction in the Z direction. This allows the substrate portion 410 to be securely attached to the circuit frame 330. However, it is not limited to this.

[0078] The circuit board 410 can be electrically connected to the outside via the input / output unit 430. For example, the circuit board 410 can acquire information related to the stacked battery cells 100 (see Figure 1). This allows the circuit board 410 to transmit electrical signals corresponding to the information to the outside via the input / output unit 430. Furthermore, the circuit board 410 can receive multiple signals from the outside via the input / output unit 430. However, according to the embodiment, as described above, the circuit unit 400 can be implemented using a proprietary battery management system.

[0079] At least a portion of the sensing terminal section 420 can be placed on the circuit section 400 (see Figure 5) or the substrate section 410. In this case, the sensing terminal section 420 can be in contact with at least a portion of the busbar terminal section 322.

[0080] According to embodiments of this disclosure, the substrate portion 410 can be implemented as a printed circuit board. For example, the substrate portion 410 can be implemented as a printed circuit board electrically connected to the sensing terminal portion 420 and the busbar terminal portion 322. According to other embodiments, the substrate portion 410 can be implemented as a flexible printed circuit board. However, it is not limited to these embodiments.

[0081] Figure 6 is a schematic cross-sectional view of the busbar assembly along line AA' in Figure 4. However, the arrangement of the components shown in Figure 6 is schematic for the sake of explanation and is not limited to this arrangement.

[0082] Referring to Figure 6, the busbar terminal portion 322 may include a bent end 3221. For example, the busbar terminal portion 322 may include a bent end 3221 that surrounds the battery cell 100 (see Figure 1) or the support portion 311 of the busbar frame 310.

[0083] The bent end 3221 of the busbar terminal portion 322 can be positioned between the housing case 200 (see Figure 1) and the multiple battery cells 100, with respect to the height direction of the housing case 200. For example, referring to Figures 1 and 6, the end 3221 can be positioned in the Z direction between the cover body 220 of the housing case 200 and the multiple battery cells 100.

[0084] The busbar terminal portion 322 may include another end 3222 that contacts the busbar plate 321 in at least a portion thereof. This allows the busbar terminal portion 322 to electrically connect the sensing terminal portion 420 and the busbar plate 321. According to one embodiment, the other end 3222 of the busbar terminal portion 322 may be a component of the busbar plate 321. That is, the other end 3222 of the busbar terminal portion 322 may be realized integrally with the busbar plate 321.

[0085] The circuit section 400 may include a sensing terminal section 420 that contacts one end 3221 of the bent busbar terminal section 322. For example, the sensing terminal section 420 may be arranged on the circuit section frame 330 and the substrate section 410 and be able to contact the busbar terminal section 322.

[0086] The sensing terminal section 420 may include one end 4201 positioned on the circuit section 400 and the other end 4202 extending in a direction toward the bent busbar terminal section 322 from the one end 4201. In this case, the other end 4202 of the sensing terminal section 420 may be positioned on one end 3221 of the bent busbar terminal section 322. For example, the other end 4202 of the sensing terminal section 420 may be positioned to overlap with one end 3221 of the busbar terminal section 322 in the Z direction.

[0087] The circuit section 400 is arranged in the same plane as the bent end 3221 of the busbar terminal section 322 and can be electrically connected to the busbar terminal section 322. For example, the circuit section 400 can be electrically connected to the busbar terminal section 322 via a sensing terminal section 420 that contacts the bent end 3221.

[0088] The busbar terminal portion 322 and the sensing terminal portion 420 can make contact with the upper end of the battery cell 100 (see Figure 1). For example, the busbar terminal portion 322 can extend from the other end 3222 and be bent in the opposite direction to the X direction, with one end 3221 positioned on the upper end of the battery cell 100 or on the busbar frame 310. In this case, the sensing terminal portion 420 is not bent and extends toward the busbar terminal portion 322, and one end 3221 of the busbar terminal portion 322 and the other end 4202 of the sensing terminal portion 420 can make contact with the upper end of the battery cell 100 in the Z direction.

[0089] In the comparative example, the busbar terminal portion 322 is not bent, and one end 3221 of the busbar terminal portion 322 can be positioned on the side (X-direction) of the battery cell 100 or the busbar frame 310. This allows the sensing terminal portion 420 to be bent in the opposite direction of the Z-direction, enabling contact with the busbar terminal portion 322, which requires a separate process for bending the sensing terminal portion 420. Furthermore, the sensing terminal portion 420, which is a component of the circuit portion 400, is bent, damaging at least a portion of the circuit portion 400, and potentially shortening the lifespan of the battery assembly 10.

[0090] According to embodiments of this disclosure, the busbar assembly 300 (see Figure 1) can have the busbar terminal portion 322 bent, with one end 3221 of the busbar terminal portion 322 positioned on the busbar frame 310. This eliminates the need for a separate bending process for the busbar terminal portion 322, relatively improving the speed of the manufacturing process and the costs incurred in the manufacturing process. For example, the manufacturing process of the battery assembly 10 can be carried out in an automated process. Furthermore, one component of the circuit portion 400 is not bent, while the busbar terminal portion 322 is bent, which can relatively reduce damage to the circuit portion 400 (or sensing terminal portion 420). This improves the physical or electrical stability of the battery assembly 10 according to this disclosure, and relatively improves the lifespan of the battery assembly 10.

[0091] Furthermore, in the comparative example, if the sensing terminal portion 420 is bent and comes into contact with the busbar terminal portion 322 on the side of the battery cell 100 or the side of the busbar frame 310, the horizontal length (e.g., in the X direction) of the battery assembly in the comparative example may become unnecessarily long.

[0092] According to the embodiments of this disclosure, one end 3221 of the busbar terminal portion 322 and the sensing terminal portion 420 are arranged on the busbar frame 310, thereby relatively reducing the horizontal length and volume of the battery assembly 10 (see Figure 1) according to this disclosure.

[0093] Since this disclosure can be implemented in various modified forms, its scope of rights is not limited to the embodiments described above. Therefore, if a modified embodiment includes elements of the claims of this disclosure, it should be considered to fall within the scope of rights of this disclosure. [Explanation of symbols]

[0094] 10 Battery Assembly 100 battery cells 200 Module Housing 300 Busbar Assembly 310 Busbar Frame 320 Bus Bar 330 Circuit Frame 400 Circuit section 410 Circuit board section 420 Sensing terminal section 430 Input / output section

Claims

1. Multiple battery cells arranged along the stacking direction; A housing case for housing the aforementioned multiple battery cells; Inside the housing case, busbars located on the sides of the plurality of battery cells and arranged along the stacking direction; Inside the housing case, a busbar terminal portion is provided which protrudes from the busbar and is bent to surround at least a portion of the plurality of battery cells; A battery assembly comprising: a circuit section arranged on the same plane as one bent end of the busbar terminal section and electrically connected to the busbar terminal section;

2. The battery assembly according to claim 1, wherein the bent end of the busbar terminal portion is positioned between the housing case and the plurality of battery cells, with reference to the height direction of the housing case.

3. The battery assembly according to claim 2, wherein the circuit portion includes a sensing terminal portion that contacts one end of the bent busbar terminal portion.

4. The battery assembly according to claim 3, wherein the sensing terminal portion includes one end positioned on the circuit portion and the other end extending in a direction toward the bent busbar terminal portion from the one end.

5. The battery assembly according to claim 4, wherein the other end of the sensing terminal portion is positioned on the one end of the bent busbar terminal portion.

6. The battery assembly according to claim 1, wherein the busbar includes one or more busbar plates, each including the busbar terminal portion.

7. The battery assembly according to claim 6, wherein one or more busbar plates are arranged along the stacking direction.

8. The system further includes a busbar frame arranged on the sides of the plurality of battery cells, with at least a portion of which is plate-shaped and extending along the stacking direction. The battery assembly according to claim 1, wherein the busbar is supported by the busbar frame.

9. It further includes a circuit frame that surrounds at least a portion of the plurality of battery cells and is connected to the busbar frame, The battery assembly according to claim 8, wherein the busbar frame includes a support portion on which the circuit frame is arranged and which covers a portion of the upper surface of the plurality of battery cells.

10. The battery assembly according to claim 9, wherein the circuit section includes a circuit board section arranged on the circuit section frame.

11. The battery assembly according to claim 10, further comprising a first coupling portion that maintains a state in which the circuit frame and at least a part of the substrate portion are coupled to each other.

12. The battery assembly according to claim 9, further comprising a second coupling portion for fixing at least a portion of the busbar frame and the circuit portion.

13. The second coupling portion is, The battery assembly according to claim 12, wherein a first sub-connecting portion arranged on the busbar frame and a second sub-connecting portion arranged on the circuit frame are fused together to form the assembly.

14. The battery assembly according to claim 1, wherein the busbar terminal portion is electrically connected to at least one of the plurality of battery cells.

15. The battery assembly according to claim 14, wherein the circuit section transmits information of the plurality of battery cells via the busbar terminal section.

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