Battery assembly

Abstract

A battery assembly according to an embodiment of the present disclosure includes a first tab and a second tab, a plurality of battery cells arranged along a predetermined stacking direction; at least one plate arranged between the plurality of battery cells; and a fluid passage located inside the at least one plate through which fluid moves, wherein the at least one plate may be electrically connected to a battery cell facing at least one of two sides, each including a side and a side formed along the stacking direction.

Description

Technology Field

[0001] The present disclosure relates to a secondary battery, and specifically to a battery assembly. Background Technology

[0003] Rechargeable batteries are batteries capable of undergoing multiple charging and discharging cycles. Depending on their unit, rechargeable batteries can be classified into battery cells and battery assemblies (e.g., battery modules, battery packs, etc.). A battery assembly may contain multiple battery cells. Battery assemblies can be used in various devices, such as electric vehicles and ships. Meanwhile, high temperatures may be generated in specific battery cells within a battery assembly under various operating environments, such as rapid charging, high-output usage, or multiple charge-discharge cycles. In such cases, stability issues may arise, such as heat transfer to adjacent battery cells and raising their temperatures; therefore, technology is required to improve the stability of the battery assembly. The problem to be solved

[0005] The embodiments of the present disclosure are intended to provide a battery assembly with improved stability.

[0006] The present disclosure can be widely applied in green technology fields such as solar power generation and wind power generation. In addition, the present disclosure can be applied to eco-friendly devices, such as electric vehicles and hybrid vehicles, for preventing climate change by suppressing air pollution and greenhouse gas emissions. means of solving the problem

[0008] A battery assembly according to an embodiment of the present disclosure includes a first tab and a second tab, a plurality of battery cells arranged along a predetermined stacking direction; at least one plate arranged between the plurality of battery cells; and a fluid passage located inside the at least one plate through which fluid moves, wherein the at least one plate may be electrically connected to a battery cell facing at least one of two sides, each including a side and a side formed along the stacking direction.

[0009] The at least one plate may be connected to a first tab of a battery cell facing one of the two sides or to a first tab of a battery cell facing the other of the two sides, or to a second tab of a battery cell facing one of the two sides or to a second tab of a battery cell facing the other of the two sides.

[0010] The above at least one plate may include a cooling portion in which the above-mentioned flow path is formed; and side portions located at both ends of the above-mentioned cooling portion.

[0011] The above at least one plate may be electrically connected to the cooling unit with the first tab or the second tab of the battery cell facing each of the two sides.

[0012] The above at least one plate may be electrically connected at the side end to a first tab or a second tab of a battery cell facing at least one of the two sides.

[0013] Each of the above plurality of battery cells includes a main body portion to which the first tab and the second tab are connected and which accommodates an electrode assembly, and the main body portion may have at least one of the two sides formed along the stacking direction in contact with the at least one plate.

[0014] The above main body can come into contact with the cooling part on at least one plate.

[0015] At least one surface in contact with the at least one plate in the above main body can be insulated.

[0016] The above side end may include a first side end formed at one end along a direction perpendicular to the stacking direction; and a second side end formed at the other end facing the one end.

[0017] The cooling portion may be formed between the first side portion and the second side portion.

[0018] The above at least one plate may include either an inlet for injecting the fluid into either the first side end or the second side end, and an outlet for discharging the fluid.

[0019] The above Euro can be connected to the above inlet and the above outlet.

[0020] The inlet port and the outlet port are formed at the first side end, and the fluid path may include a first fluid path that communicates with the inlet port and moves the fluid from the first side end toward the second side end; and a second fluid path that communicates with the first fluid path and the outlet port and moves the fluid.

[0021] It may further include a supply pipe for supplying the fluid to the inlet; and a discharge pipe for moving the fluid discharged from the outlet.

[0022] The above at least one plate is formed in multiple numbers, and multiple plates can be connected to the supply pipe and the discharge pipe.

[0023] The first tab may include a first bend portion in which at least a portion is bent toward one side of one of the at least one plate; and a first connecting portion that is bent at the first bend portion and extends parallel to one side of the one plate.

[0024] The first connecting part above can be electrically connected to one side of the plate above.

[0025] The second tab may include a second bend portion in which at least a portion is bent in a direction opposite to the direction in which the first bend portion is bent; and a second connecting portion that is bent in a direction opposite to the first connecting portion at the second bend portion and extends parallel to the one side.

[0026] The second connecting portion may be electrically connected to the other side of the other plate among the at least one plate.

[0027] It may further include a sensing terminal coupled to the at least one plate so as to be electrically connected to the at least one plate, for detecting the voltage or current of the plurality of battery cells.

[0028] The above sensing terminal can further detect the temperature of the plurality of battery cells and can detect thermal runaway of the plurality of battery cells by communicating with a sensor that detects the presence or absence of gas generation or pressure in the space containing the plurality of battery cells.

[0029] The apparatus further includes a case forming a receiving space for accommodating the plurality of battery cells and the at least one plate, wherein the case may include an end plate additionally disposed between the plurality of battery cells and the case along the stacking direction inside the case.

[0030] At least a portion of the inner surface of the above-mentioned receiving space can be insulated.

[0031] The above end plate may further include a high-voltage terminal portion that electrically connects the plurality of battery cells and the outside of the case. Effects of the invention

[0033] An embodiment of the present disclosure can provide a battery assembly with improved stability.

[0034] According to an embodiment of the present disclosure, the thermal stability of the battery assembly can be improved.

[0035] According to an embodiment of the present disclosure, the cooling performance of a battery assembly can be improved.

[0036] According to an embodiment of the present disclosure, the performance of a battery assembly can be improved depending on the cooling performance.

[0037] According to an embodiment of the present disclosure, the contact area for cooling the battery cell can be improved.

[0038] According to an embodiment of the present disclosure, the reduction in the density of the battery cells within the battery assembly can be minimized in order to cool the battery cells. Brief explanation of the drawing

[0040] FIG. 1 is a drawing for explaining a battery assembly according to an embodiment. FIG. 2 is a drawing for explaining a battery cell according to an embodiment. FIG. 3 is a drawing for explaining a plate according to an embodiment. FIG. 4 is a drawing for explaining the combination of a battery cell and a plate according to an embodiment. FIG. 5 is a drawing for explaining a sensing terminal according to an embodiment. FIG. 6 is a diagram illustrating the connection relationship of battery cells according to an embodiment. FIG. 7 is a diagram illustrating the connection relationship of battery cells according to another embodiment. FIG. 8 is a diagram illustrating the connection relationship of battery cells according to another embodiment. FIG. 9 is a schematic diagram illustrating the connection relationship between a battery cell and a side end according to another embodiment. FIG. 10 is a schematic diagram illustrating the connection relationship between a battery cell and a cooling unit according to another embodiment. Specific details for implementing the invention

[0041] The structural or functional descriptions of the embodiments disclosed in this specification or application are merely illustrative for the purpose of explaining embodiments according to the technical concept of the present invention. Embodiments according to the technical concept of the present invention may be implemented in various forms other than those disclosed in this specification or application, and the technical concept of the present invention is not to be interpreted as being limited to the embodiments described in this specification or application.

[0042] FIG. 1 is a drawing for explaining a battery assembly according to an embodiment.

[0043] Referring to FIG. 1, a battery assembly (100) according to an embodiment may include a plurality of battery cells (110) and at least one plate (130). For example, the battery assembly (100) may correspond to various types of energy storage devices, such as a battery module, a battery pack, or an Energy Storage System (ESS). The battery assembly (100) may supply electrical energy to an external device. The battery assembly (100) may receive electrical energy from an external power source. The battery assembly (100) according to an embodiment may further include a sensing terminal (150). The battery assembly (100) according to an embodiment may further include a case (170).

[0044] Each of the plurality of battery cells (110) may be a secondary battery capable of charging and discharging multiple times. For example, the secondary battery may be one of various types such as a lithium-ion battery, a lithium-polymer battery, a nickel-hydrogen battery, a nickel-cadmium battery, a sodium battery, or an all-solid-state battery. The plurality of battery cells (110) may be arranged along a stacking direction. For example, the stacking direction may be a first horizontal direction (e.g., the X-axis direction). The number of battery cells (110) may be two or more.

[0045] A plurality of battery cells (110) may include one battery cell (110a) and another battery cell (110b). A plurality of battery cells (110) may further include battery cells (110) other than one battery cell (110a) and another battery cell (110b).

[0046] A plurality of battery cells (110) include a first tab (111) and a second tab (112) and can be arranged along a pre-set stacking direction.

[0047] One battery cell (110a) and another battery cell (110b) may be battery cells arranged adjacent to each other in a first horizontal direction or a stacking direction (e.g., X-axis direction) among a plurality of battery cells (110). Hereinafter, the stacking direction is referred to as the first horizontal direction.

[0048] Each battery cell (110) may include a first tab (111) and a second tab (112), wherein the first tab (111) corresponds to a positive tab or a negative tab, and the second tab (112) corresponds to a tab having a different polarity from the first tab (111). One battery cell (110a) may include a first tab (111a) and a second tab (112a). One battery cell (110a) may further include a main body (115a). In an embodiment, the first tab (111a) and the second tab (112a) may protrude from the main body (115a) in a second horizontal direction or a direction perpendicular to the stacking direction (e.g., Y-axis direction). Hereinafter, the direction perpendicular to the stacking direction is referred to as the second horizontal direction.

[0049] Another battery cell (110b) may include a first tab (111b) and a second tab (112b). Another battery cell (110b) may further include a main body (115b). In an embodiment, the first tab (111b) and the second tab (112b) may protrude from the main body (115b) in a second horizontal direction (e.g., Y-axis direction).

[0050] In an embodiment, the main body (115a) of one battery cell (110a) and the main body (115b) of another battery cell (110b) may face each other in a first horizontal direction (e.g., X-axis direction). Specifically, the one battery cell (110a) and the other battery cell (110b) may be arranged so that the main body (115a) of the one battery cell (110a) and the main body (115b) of the other battery cell (110b) face each other.

[0051] In an embodiment, the first tab (111b) of the other battery cell (110b) may face the first tab (111a) of the first battery cell (110a), and the second tab (112b) of the other battery cell (110b) may face the second tab (112) of the first battery cell (110a). That is, the first tab (111a) of the first battery cell (110a) and the first tab (111b) of the other battery cell (110b) may face each other, and the second tab (112a) of the first battery cell (110a) and the second tab (112b) of the other battery cell (110b) may face each other. In this case, the first tab (111a) and the first tab (111b) may protrude in the same direction as each other, and the second tab (112a) and the second tab (112b) may protrude in the same direction as each other.

[0052] A plate (130) may be placed between a plurality of battery cells (110). An embodiment may include at least one plate (130), each of which may be placed between a plurality of battery cells (110).

[0053] In an embodiment, the number of plates (130) included in the battery assembly (100) may be multiple. In an embodiment, the multiple plates (130) may be arranged one by one between adjacent battery cells among the multiple battery cells (110). In this case, the number of plates (130) may be one less than the number of battery cells (110).

[0054] In the embodiment, an insulating material may be coated on the surface of the plate (130). The insulating material is a material having electrical insulating properties. The insulating material may be, for example, mica, plastic, rubber, silicone, etc.

[0055] At least one plate (130) may be electrically connected to the first tab (111a) of one battery cell (110a) on one side or the other side of which each includes a side and a side formed along the stacking direction, or may be electrically connected to the second tab (112b) of another battery cell (110b) on one side or the other side.

[0056] At least one plate (130) may be electrically connected to the first tab (111a) of one battery cell (110a) on at least one of the two sides, each including one side and the other side formed along the stacking direction, and may be electrically connected to the second tab (112b) of another battery cell (110b) on the other side.

[0057] In one embodiment, at least one plate (130) may be electrically connected to a first tab (111a) of a battery cell facing one of the two sides or to a first tab (111a) of a battery cell facing the other of the two sides, or to a second tab (112b) of a battery cell facing one of the two sides or to a second tab (112b) of a battery cell facing the other of the two sides.

[0058] A plate (130) may be placed between one battery cell (110a) and another battery cell (110b). The plate (130) may electrically connect one battery cell (110a) and another battery cell (110b) to each other. The plate (130) may be electrically connected to a first tap (111) and a second tap (112).

[0059] In an embodiment, the plate (130) can cool at least one of one battery cell (110a) and another battery cell (110b). In an embodiment, the plate (130) can be in contact with the mutually facing surfaces of the one battery cell (110a) and the other battery cell (110b), respectively. The plate (130) can cool the heat generated in at least one of the one battery cell (110a) and the other battery cell (110b) using cooling water. Accordingly, the temperature of the one battery cell (110a) and the other battery cell (110b) can be maintained at an appropriate temperature.

[0060] According to the present disclosure, a separate busbar member extending in a first horizontal direction in which a plurality of battery cells (110) are stacked at the side of a plurality of battery cells (110) to electrically connect the plurality of battery cells (110) may be omitted. According to the present disclosure, a battery assembly (100) with improved cooling performance and space efficiency can be provided.

[0061] In an embodiment, the sensing terminal (150) may be coupled to the plate (130) so as to be electrically connected to the plate (130). The sensing terminal (150) is electrically connected to the plate (130) so as to be able to measure the voltage of one battery cell (110a) and another battery cell (110b).

[0062] In an embodiment, the case (170) can accommodate a plurality of battery cells (110) and at least one plate (130). For example, a receiving space may be formed on the inner side enclosed by the case (170). A plurality of battery cells (110) and at least one plate (130) may be accommodated in the receiving space.

[0063] At least a portion of the inner surface of the receiving space may be insulated. The receiving space may be electrically disconnected from a plurality of battery cells (110) and at least one plate (130) received inside.

[0064] In an embodiment, the case (170) may include at least one of an end plate (175, 176), a side cover, a bottom cover, and a top cover. In an embodiment, the end plate (175, 176), the side cover, the bottom cover, and the top cover may be joined to each other using methods such as welding or bolting. The end plate (175, 176) may be arranged with a plurality of battery cells (110) in between in a first horizontal direction (e.g., X-axis direction).

[0065] The end plates (175, 176) can be placed between a plurality of battery cells (110) and the case (170) along the stacking direction (e.g., X-axis direction) inside the case (170).

[0066] The end plates (175, 176) may include high-voltage terminal portions that electrically connect the exterior of a plurality of battery cells (110) and a case (170).

[0067] The side cover may be positioned with a plurality of battery cells (110) in between in a second horizontal direction (e.g., Y-axis direction). The lower cover and the upper cover may be positioned with a plurality of battery cells (110) in between in a height direction (e.g., Z-axis direction). Here, the first horizontal direction (e.g., X-axis direction), the second horizontal direction (e.g., Y-axis direction), and the height direction (e.g., Z-axis direction) may be directions perpendicular to each other.

[0068] Below, one of the multiple battery cells (110) will be described.

[0069] FIG. 2 is a drawing for explaining a battery cell according to an embodiment.

[0070] Referring to FIG. 2, the battery cell (110) may include a main body (115) and an electrode tab. Specifically, a plurality of battery cells (110) may include a main body (115) in which a first tab (111) and a second tab (112) are connected and an electrode assembly is accommodated. At least one of the two sides of the main body (115) formed along the stacking direction (e.g., X-axis direction) may be in contact with the at least one plate (130).

[0071] The main body (115) may include an electrode assembly, an electrolyte, and an outer casing. The electrode assembly may include a cathode and an anode having different electrical polarities. The cathode and the anode may be stacked alternately. The cathode and the anode may convert chemical energy into electrical energy through a redox reaction.

[0072] In an embodiment, the electrode assembly may further include a separator. The separator may be placed between the cathode and the anode so that the anode and the cathode do not come into contact with each other. A portion of the electrode tab may be located inside the outer casing, and another portion of the electrode tab may protrude outside the outer casing. The electrolyte may be a medium that transmits ions or current between the anode and the cathode. The outer casing may accommodate the electrode assembly.

[0073] In the embodiments, the outer material may include a pouch film. In this case, a portion of the outer material may be sealed while the electrode assembly is accommodated in the inner space of the outer material. In the embodiments, the pouch film may include at least one of nylon, aluminum, and CPP (Chlorinated Polypropylene).

[0074] Meanwhile, the above-described embodiment is merely one example, and the exterior material may have various shapes such as rectangular or cylindrical, and the exterior material may be implemented to include various materials such as aluminum, alloy materials, and composite materials.

[0075] The electrode tab may include a first tab (111) and a second tab (112) having different electrical polarities. The first tab (111) may include a first bending portion (111c) in which at least a portion is bent toward one side of one plate (130) among at least one plate (130), and a first connecting portion (111w) that is bent from the first bending portion (111c) and extends parallel to one side of the plate (130).

[0076] The first connection part (111w) can be electrically connected to one side of the plate (130).

[0077] The second tab (112) may include a second bend (112c) in which at least a portion is bent in the opposite direction to the direction in which the first bend (111c) is bent, and a second connecting portion (112w) that is bent in the opposite direction to the first connecting portion (111w) at the second bend (112c) and extends parallel to one side.

[0078] The second connection part (112w) can be electrically connected to the other side of the other plate (130) among at least one plate (130).

[0079] The following description assumes that the first tap (111) is a positive tap and the second tap (112) is a negative tap, but the polarity of the first tap (111) and the second tap (112) is not limited thereto.

[0080] The electrode tab may include a positive tab and a negative tab having different electrical polarities. The positive tab may be electrically connected to the positive electrode of the electrode assembly, and the negative tab may be electrically connected to the negative electrode of the electrode assembly.

[0081] In the embodiments, the positive tab and the negative tab may be bent. For example, the number of times each of the positive tab and the negative tab is bent may be one or more. The bent angle may be 90 degrees, but is not limited thereto and may be modified to various values.

[0082] In an embodiment, the positive tab and the negative tab may protrude from different sides of the main body (115). For example, the positive tab and the negative tab may protrude one from each of the two sides of the main body (115) in the second horizontal direction (e.g., the Y-axis direction). In another embodiment, the positive tab and the negative tab may protrude from the same side of the main body (115).

[0083] In an embodiment, the positive tab may include at least one of a positive protrusion (111p), a positive bend (111c), and a positive connection (111w). The positive protrusion (111p) may be a part of the positive tab that protrudes outward from the main body (115).

[0084] For example, the anode protrusion (111p) may extend in a second horizontal direction (e.g., Y-axis direction). The anode connection (111w) may be a part of the anode tab spaced apart from the anode protrusion (111p) in a first horizontal direction (e.g., X-axis direction). The anode connection (111w) may extend in a second horizontal direction (e.g., Y-axis direction). The anode bend (111c) may connect the anode protrusion (111p) and the anode connection (111w). The anode connection (111w) may include an area welded to the plate.

[0085] In the embodiment, the anode protrusion (111p), the anode bend (111c), and the anode connecting part (111w) may be a single integral structure. The anode bend (111c) may be a portion that is bent and extended from the end of the anode protrusion (111p). The anode connecting part (111w) may be a portion that is bent and extended from the end of the anode bend (111c).

[0086] In an embodiment, the cathode tab may include at least one of a cathode protrusion (112p), a cathode fold (112c), and a cathode connection (112w). The cathode protrusion (112p) may be a part of the cathode tab that protrudes outward from the main body (115).

[0087] For example, the cathode protrusion (112p) may extend in a second horizontal direction (e.g., Y-axis direction). The cathode connection portion (112w) may be a part of the cathode tab spaced apart from the cathode protrusion (112p) in a first horizontal direction (e.g., X-axis direction). The cathode connection portion (112w) may extend in a second horizontal direction (e.g., Y-axis direction). The cathode bend portion (112c) may connect the cathode protrusion (112p) and the cathode connection portion (112w). The cathode connection portion (112w) may include an area welded to a plate. Meanwhile, the plate welded to the cathode connection portion (112w) and the plate welded to the anode connection portion (111w) may be different plates.

[0088] In the embodiment, the cathode protrusion (112p), the cathode fold (112c), and the cathode connection (112w) may be a single integral structure. The cathode fold (112c) may be a portion that is bent and extended from the end of the cathode protrusion (112p). Here, the direction in which the cathode fold (112c) is extended may be opposite to the direction in which the anode fold (111c) is extended.

[0089] For example, the negative bend (112c) may be extended in the -X axis direction, and the positive bend (111c) may be extended in the +X axis direction. The negative connection (112w) may be a portion that is bent and extended from the end of the negative bend (112c). Here, the direction in which the negative connection (112w) is extended may be opposite to the direction in which the positive connection (111w) is extended. For example, the negative connection (112w) may be extended in the +Y axis direction, and the positive connection (111w) may be extended in the -Y axis direction.

[0090] The description of the battery cell (110) in Fig. 2 can be applied equally to each of the one battery cell (110a) and the other battery cell (110b) in Fig. 1.

[0091] In an embodiment, referring to FIGS. 1 and 2, one battery cell (110a), a plate (130), another battery cell (110b), and another plate may be arranged sequentially in the +X axis direction. Here, the plate (130) may be placed between the one battery cell (110a) and the other battery cell (110b).

[0092] At least one plate (130) may include a cooling section (135) where a Euro is formed and side sections located at both ends of the cooling section (135).

[0093] For example, the plate (130) may include a first side end (131), a second side end (132), and a cooling part (135).

[0094] In the embodiment, the cooling portion (135) is manufactured by an extrusion method, and the first side portion (131) and the second side portion (132) may be manufactured by die casting or machining. The first side portion (131) and the second side portion (132) may each extend from both ends of the cooling portion (135). The other plate may have the same configuration as the plate (130).

[0095] The cooling section (135) may be formed between the first side section (131) and the second side section (132).

[0096] In an embodiment, one battery cell (110a) may include a first tab (111a) and a second tab (112a). The first tab (111a) of one battery cell (110a) may include at least one of a first positive protrusion, a first positive bend, and a first positive connection. In an embodiment, the first positive bend may extend toward a first side end (131) of a plate (130).

[0097] For example, if the plate (130) is positioned in the +X axis direction in one battery cell (110a), the first positive bend of the one battery cell (110a) may be extended in the +X axis direction. The first positive connection of the one battery cell (110a) may be bent at the first positive bend and extended in a second horizontal direction (e.g., Y axis direction). For example, if the first positive bend is extended in the +X axis direction, the first positive connection may be bent at the end of the first positive bend and extended in the -Y axis direction.

[0098] The second tab (112a) of the battery cell (110a) may include at least one of a first negative protrusion, a first negative bend, and a first negative connection. In an embodiment, the first negative bend may extend in the opposite direction to the first positive bend.

[0099] For example, if the first positive bend is extended in the +X-axis direction, the first negative bend may be extended in the -X-axis direction. The first negative connection may be bent at the first negative bend and extended in a second horizontal direction (e.g., Y-axis direction).

[0100] For example, if the first cathode bend portion is extended in the -X axis direction, the first cathode connection portion may be bent at the end of the first cathode bend portion and extended in the +Y axis direction.

[0101] In an embodiment, another battery cell (110b) may include a first tab (111b) and a second tab (112b).

[0102] The first tab (111b) of another battery cell (110b) may include at least one of a second positive protrusion, a second positive bend, and a second positive connection. In an embodiment, the second positive bend may extend in the same direction as the first positive bend of one battery cell (110a). Or, the second positive bend may extend toward a first side end of another plate.

[0103] Alternatively, the second positive bend may be extended in the opposite direction to the second negative bend. The second positive connection may be bent at the second positive bend and extended in a second horizontal direction (e.g., Y-axis direction).

[0104] The second tab (112b) of the other battery cell (110b) may include at least one of a second negative protrusion, a second negative bend, and a second negative connection. The second negative bend may extend toward the second side end (132) of the plate (130). For example, if the plate (130) is positioned in the -X axis direction in the other battery cell (110b), the second negative bend of the other battery cell (110b) may extend in the -X axis direction. The second negative connection may be bent at the second negative bend and extend in a second horizontal direction (e.g., Y axis direction).

[0105] FIG. 3 is a drawing for explaining a plate according to an embodiment.

[0106] Referring to FIG. 1 and FIG. 3, a plate (130) according to an embodiment of the present disclosure may include at least one of a first side end (131), a second side end (132), and a cooling portion (135). In an embodiment, at least one of the first side end (131), the second side end (132), and the cooling portion (135) may be made of aluminum.

[0107] The main body (115) may come into contact with a cooling part (135) in which a flow path is formed in at least one plate (130). At least one surface of the main body (115) that comes into contact with the at least one plate (130) may be insulated.

[0108] The cooling unit (135) according to the embodiment may be in contact with the main body (115a) of one battery cell (110a) and the main body (115b) of another battery cell (110b). The cooling unit (135) may cool the one battery cell (110a) and the other battery cell (110b).

[0109] In an embodiment, the cooling unit (135) may include a flow path. The flow path may be a passage through which cooling water travels.

[0110] The Euro can be connected to the injection port (136) and discharge port (137) described later.

[0111] In an embodiment, the flow path may include a plurality of tubes. The plurality of tubes may include a first flow path (135a) and a second flow path (135b). The shape of the flow path or tube may be modified in various ways.

[0112] In an embodiment, each of the plurality of pipes may extend in a second horizontal direction (e.g., Y-axis direction). For example, the first flow path (135a) and the second flow path (135b) may extend in a second horizontal direction (e.g., Y-axis direction). Each of the plurality of pipes may be separated from each other by being spaced apart in a height direction (e.g., Z-axis direction). For example, the first flow path (135a) and the second flow path (135b) may be separated from each other by being spaced apart in a height direction (e.g., Z-axis direction).

[0113] In an embodiment, the first side end (131) and the second side end (132) may protrude in a second horizontal direction (e.g., Y-axis direction) from both ends of the cooling part (135). The second horizontal direction (e.g., Y-axis direction) may be a direction perpendicular to the first horizontal direction (e.g., X-axis direction).

[0114] At least one plate (130) may include a first side end (131) formed at one end along a direction perpendicular to the stacking direction (e.g., Y-axis direction) and a second side end (132) formed at the other end facing the first end.

[0115] In an embodiment, the second side end (132) may include a bend connected to the first flow path (135a) and the second flow path (135b) to allow coolant to move from the first flow path (135a) to the second flow path (135b). That is, coolant within the first flow path (135a) can move into the second flow path (135b) through the bend. The second side end (132) can control or return the flow of coolant. The number of times the second side end (132) returns coolant may be one or more. Accordingly, the temperature variation inside the battery cell can be minimized.

[0116] In an embodiment, the first side portion (131) may include an inlet (136) into which cooling water is injected and an outlet (137) into which cooling water is discharged. Here, cooling water refers to a liquid or fluid for cooling heat.

[0117] In another embodiment, the first side end (131) may include an inlet (136) into which coolant is injected. And, the second side end (132) may include an outlet (137) into which coolant is discharged.

[0118] At least one plate (130) may include either an inlet (136) into which fluid is injected and an outlet (137) into which fluid is discharged, either of a first side end (131) and a second side end (132).

[0119] In an embodiment, an inlet port (136) and an outlet port (137) may be formed in a first side end (131). The flow path may include a first flow path (135a) that communicates with the inlet port (136) and moves fluid from the first side end (131) toward the second side end (132), and a second flow path (135b) that communicates with the first flow path (135a) and the outlet port (137) and moves fluid.

[0120] In an embodiment, a hose tube (146, 147) may be connected to each of the inlet (136) and the outlet (137). For example, the hose tube (146, 147) may be connected to the inlet and outlet of another plate. In an embodiment, the hose tube (146, 147) may comprise at least one material of silicone and rubber. In an embodiment, a Y-shaped, T-shaped nipple, etc. may be applied to at least one of the inlet (136) and the outlet (137).

[0121] In the embodiment, a supply pipe and a discharge pipe may be connected to each of the inlet (136) and the outlet (137).

[0122] The supply pipe can supply fluid to the inlet (136), and the discharge pipe can move the fluid discharged from the outlet (137).

[0123] If at least one plate (130) is formed in multiple numbers, the multiple plates (130) can be simultaneously connected to the supply pipe and the discharge pipe. The supply pipe and the discharge pipe can penetrate a portion of the multiple plates (130).

[0124] As the first side end (131), the second side end (132) and the cooling part (135) are formed of a metal material, some areas may be insulated. The first side end (131) and the second side end (132) may be insulated except for the parts connected to the first tab (111) or the second tab (112).

[0125] The cooling part (135) in contact with the main body part (115) of the battery cell (110) can be insulated.

[0126] The cooling unit (135) may not be electrically connected through contact with the main body (115) of the battery cell (110). That is, the cooling unit (135) may be electrically connected to the battery cell (110) through a first side end (131) or a second side end (132) connected to the first tab (111) or the second tab (112) of the battery cell (110).

[0127] In the cooling section (135), the first tab (111) or second tab (112) of the battery cell (110) facing at least one side of each of the plates (130) can be electrically connected.

[0128] In the first side section (131) or the second side section (132), the first tab (111) or the second tab (112) of the battery cell (110) facing at least one side of each of the plates (130) can be electrically connected.

[0129] The cooling part (135) can cool the battery cell (110) by contacting the main body part (115) of the battery cell (110).

[0130] In the previously described embodiment, the first side portion (131), the second side portion (132), and the cooling portion (135) could be formed from a metal material including aluminum.

[0131] In another embodiment, the first side end (131), the second side end (132), or the cooling part (135) in the plate (130) may be formed of a non-metallic material. For example, the first side end (131) and the second side end (132) may be formed of a metal material, but the cooling part (135) may be formed of a non-metallic material including plastic. Alternatively, the cooling part (135) may be formed of a metal material, but the first side end (131) and the second side end (132) may be formed of a non-metallic material including plastic.

[0132] In order to connect the first side section (131) and the second side section (132) with the cooling section (135), joining of a metal material and a non-metal material may be required. In order to complete the plate (130), joining between different materials may be required.

[0133] The bonding of the metal material and the non-metal material can be achieved by performing a surface treatment to form fine pores on the surface of the metal material, and then flowing an adhesive to bond with the non-metal material. Alternatively, the non-metal material can be bonded through the adhesive present in the pores formed on the metal surface. Or, the metal material and the non-metal material can be connected via bolts or the like.

[0134] If the first side end (131) and the second side end (132) are formed of a non-metallic material, a busbar can be arranged adjacently. The busbar adjacent to the battery cell (110) and the first side end (131) or the second side end (132) can be electrically connected.

[0135] FIG. 4 is a drawing for explaining the combination of a battery cell and a plate according to an embodiment.

[0136] Referring to FIGS. 1 and 4, according to an embodiment, a first tab (111a) of a battery cell (110a) may be welded to a first side end (131) of a plate (130) so as to be electrically connected to the first side end (131). For example, the first positive connection portion (111aw) of the first tab (111a) may be welded by melting and solidifying the front portion of the first positive connection portion (111aw) while the first positive connection portion (111aw) overlaps the front portion of the first side end (131). At this time, the welding may be performed by various methods such as laser welding, friction stir welding, brazing welding, resistance welding, and ultrasonic welding.

[0137] According to an embodiment, the second tab (112b) of another battery cell (110b) can be welded to the second side end (132) so as to be electrically connected to the second side end (132) of the plate (130).

[0138] For example, when the second cathode connection portion (112bw) of the second tab (112b) overlaps the rear end of the second side portion (132), the rear end of the second cathode connection portion (112bw) can be welded by melting and solidifying. At this time, welding can be performed by various methods such as laser welding, friction stir welding, brazing welding, resistance welding, and ultrasonic welding.

[0139] FIG. 5 is a drawing for explaining a sensing terminal according to an embodiment.

[0140] Referring to FIGS. 1 and 5, a sensing terminal (150) according to an embodiment may be coupled to a plate (130) so as to be electrically connected to the plate (130). The sensing terminal (150) may measure the voltage or current of one battery cell (110a) and another battery cell (110b). The sensing terminal (150) may measure the voltage or current of one battery cell (110a) and another battery cell (110b) through the plate (130) to which it is electrically connected. In an embodiment, the sensing terminal (150) may measure the temperature of one battery cell (110a) and another battery cell (110b).

[0141] The sensing terminal (150) can detect thermal runaway of the multiple battery cells (110) by communicating with a separate sensor that detects the presence or absence of gas generation or pressure in a space containing multiple battery cells (110).

[0142] In an embodiment, the sensing terminal (150) may be coupled to at least one plate (130) through a fixing member (160). For example, the fixing member (160) may be a member such as a screw or a bolt. In an embodiment, the sensing terminal (150) may be electrically connected to the plate (130) through the fixing member (160). The fixing member (160) may include a conductive material. For example, the sensing terminal (150) may include a printed circuit board for measuring the voltage of the plate (130). A through hole may be formed in the printed circuit board, and a terminal exposed around the through hole may be formed. The fixing member (160) may be inserted into the through hole and come into contact with the terminal. In another embodiment, the sensing terminal (150) may be coupled to at least one plate (130) by welding.

[0143] In an embodiment, a sensing terminal (150) may be positioned on one side of at least one plate (130). According to the present disclosure, the plate (130) may function as a busbar, and the sensing terminal (150) positioned on the side may be electrically connected to all battery cells (110) within the battery assembly (100). This structural arrangement may improve spatial efficiency.

[0144] FIG. 6 is a diagram illustrating the connection relationship of battery cells according to an embodiment.

[0145] Referring to FIGS. 1 and FIGS. 6, one battery cell (110a) and another battery cell (110b) according to an embodiment of the present disclosure may be connected in series through a plate (130). That is, a plurality of battery cells (110) of the present disclosure may be connected in series through a plate (130) placed between them. A sensing terminal (150) may be electrically connected to each plate (130) to measure individual voltages (V1 to V3) between the plurality of battery cells (110).

[0146] A battery assembly (100) may include a plurality of battery cells (110) and a plurality of plates (130). The plurality of battery cells (110) and the plurality of plates (130) may be stacked in a first horizontal direction. One plate may be placed between each of the plurality of battery cells (110). In an embodiment, an additional plate may be placed on the outermost side of the plurality of battery cells (110).

[0147] In an embodiment, a plurality of battery cells (110) may include a first battery cell, a second battery cell, and a third battery cell arranged sequentially in a first horizontal direction. A plurality of plates (130) may include a first plate, a second plate, a third plate, and a fourth plate arranged sequentially in a first horizontal direction.

[0148] A first plate may be disposed on the outside of a first battery cell. A second plate may be disposed between the first and second battery cells. A third plate may be disposed between the second and third battery cells. A fourth plate may be disposed on the outside of a third battery cell.

[0149] The negative tab of the first battery cell may be electrically connected to the first side end of the first plate. The negative tab of the second battery cell may be electrically connected to the first side end of the second plate, and the positive tab of the first battery cell may be electrically connected to the second side end of the second plate. The negative tab of the third battery cell may be electrically connected to the first side end of the third plate, and the positive tab of the second battery cell may be electrically connected to the second side end of the third plate. The positive tab of the third battery cell may be electrically connected to the second side end of the fourth plate. In this case, the first to third battery cells may be connected in series through a plurality of plates.

[0150] The sensing terminal (150) may be electrically connected to one of the two end portions of each of the plurality of plates. For example, the sensing terminal (150) may be electrically connected to the first end portion of each of the first to fourth plates. As another example, the sensing terminal (150) may be electrically connected to the second end portion of each of the first to fourth plates. According to one embodiment of the present disclosure, the sensing terminal (150) may be positioned adjacent to one of the two end portions, thereby improving space efficiency.

[0151] Additionally, as shown in FIG. 6, a plate (130) placed between one battery cell (110a) and another battery cell (110b) can be electrically connected to the first tab (111a) of the one battery cell (110a) on one side of the two sides formed along the stacking direction, and electrically connected to the second tab (112b) of the other battery cell (110b) on the other side.

[0152] FIG. 7 is a diagram illustrating the connection relationship of battery cells according to another embodiment.

[0153] As illustrated in FIG. 7, the second tab (112a) of one battery cell (110a) and the first tab (111b) of another battery cell (110b) are electrically connected, and the first tab (111a) of one battery cell (110a) is connected to one plate, and the second tab (112b) of another battery cell (110b) is connected to the next stacked one plate.

[0154] Additionally, as illustrated in FIGS. 6 and 7, at least one plate of a battery assembly according to one embodiment and another embodiment of the present invention may be electrically connected at a side end to a first tab or a second tab of a battery cell facing at least one of the two sides of the plate.

[0155] FIG. 8 is a diagram illustrating the connection relationship of battery cells according to another embodiment.

[0156] As illustrated in FIG. 8, a configuration may be provided in which a plurality of first tabs (111) of a plurality of battery cells arranged in parallel on one plate are connected, and a plurality of second tabs (112) of a plurality of battery cells are connected on the next stacked one plate.

[0157] In addition, at least one plate of a battery cell according to another embodiment of the present invention may be electrically connected at a cooling unit to a first tab or a second tab of a battery cell facing at least one of the two sides of the plate.

[0158] FIGS. 6 to 8 described above relate to various embodiments in which a single battery cell (110) is placed between plates (130), but the connection relationship between the battery cell (110) and the plates (130) is not limited thereto.

[0159] For example, two battery cells (110) may be placed between plates (130). Each of the two battery cells (110) may have at least one of its two sides in contact with the plates (130). The two battery cells (110) may be electrically connected to the contacted plates (130) through a first tab (111) or a second tab (112), and the remaining tab may be electrically connected between the two battery cells (110).

[0160] For example, a first battery cell and a second battery cell may be sequentially placed between a first plate and a second plate. The first battery cell may be placed between the first plate and the second battery cell, and the second battery cell may be placed between the first battery cell and the second plate. The main body (115) of the first battery cell may be in contact with the cooling part (135) of the first plate, and the main body (115) of the second battery cell may be in contact with the cooling part (135) of the second plate.

[0161] The first tab (111) of the first battery cell may be electrically connected to the first plate, and the second tab (112) of the second battery cell may be electrically connected to the second plate. The second tab (112) of the first battery cell and the first tab (111) of the second battery cell may be electrically connected to each other.

[0162] Alternatively, the first plate and the first tab (111) of the first battery cell and the first tab (111) of the second battery cell may be electrically connected, and the second plate and the second tab (112) of the first battery cell and the second tab (112) of the second battery cell may be electrically connected.

[0163] Another embodiment may include a busbar electrically connected to a battery cell (110) and a plate (130). The busbar may be electrically connected to a plurality of battery cells (110) and a plurality of plates (130). The busbar may be positioned adjacent to a first tab (111) or a second tab (112) of a battery cell (110). One busbar may be electrically connected to the first tab (111) of a plurality of battery cells (110), and the other busbar may be electrically connected to the second tab (112) of a plurality of battery cells (110).

[0164] One busbar and another busbar can be electrically connected to the same battery cell (110) or plate (130). The busbar may include a conductive material such as aluminum or copper. A sensing terminal (150) can be connected to the busbar.

[0165] FIG. 9 is a schematic diagram illustrating the connection relationship between a battery cell and a side portion (131) according to another embodiment.

[0166] As illustrated in FIG. 9, the first tab (111) may include a first bending portion (111c) in which at least a portion is bent toward one side of one plate (130) of at least one plate (130), and a first connecting portion (111w) that is bent from the first bending portion (111c) and extends parallel to one side of the plate (130).

[0167] In addition, a first connecting part (111w) extending parallel to this one side can be connected to the first side end (131).

[0168] FIG. 10 is a schematic diagram illustrating the connection relationship between a battery cell and a cooling unit (135) according to another embodiment.

[0169] As illustrated in FIG. 10, the first tab (111) may include a first bending portion (111c) in which at least a portion is bent toward one side of one plate (130) of at least one plate (130), and a first connecting portion (111w) that is bent from the first bending portion (111c) and extends parallel to one side of the plate (130).

[0170] In addition, a first connecting part (111w) extending parallel to this one side can be connected to a cooling part (135).

[0171] According to the embodiment of the present disclosure as described above, the thermal stability of the battery assembly (100) can be improved.

[0172] According to an embodiment of the present disclosure, the cooling performance of the battery assembly (100) can be improved. According to an embodiment of the present disclosure, the performance of the battery assembly (100) can be improved according to the cooling performance. According to an embodiment of the present disclosure, the contact area for cooling the battery cell (110) can be improved. According to an embodiment of the present disclosure, the decrease in the density of the battery cell (110) within the battery assembly (100) can be minimized in order to cool the battery cell (110). Explanation of the symbols

[0174] 100: Battery assembly 110: Battery cell 110a: Single battery cell 110b: Another battery cell 130: Plate 150: Sensing terminal 170: Case

Claims

Claim 1 A battery assembly comprising: a plurality of battery cells arranged along a predetermined stacking direction, each including a first tab and a second tab; at least one plate arranged between the plurality of battery cells; and a fluid passage located inside the at least one plate through which fluid moves, wherein the at least one plate is electrically connected to a battery cell facing at least one of two sides, each including a one side and a other side formed along the stacking direction, and the at least one plate is connected to a first tab of a battery cell facing the one side of the two sides or a first tab of a battery cell facing the other side of the two sides, or is connected to a second tab of a battery cell facing the one side of the two sides or a second tab of a battery cell facing the other side of the two sides, and the at least one plate includes a cooling portion where the fluid passage is formed and side portions located at both ends of the cooling portion, and is electrically connected at the cooling portion to the first tab or the second tab of a battery cell facing at least one of the two sides. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 In claim 1, the plurality of battery cells each include a main body portion to which the first tab and the second tab are connected and which accommodates an electrode assembly, and the main body portion is a battery assembly in which at least one of the two sides formed along the stacking direction contacts the at least one plate. Claim 7 In claim 6, the main body portion is a battery assembly in contact with the cooling portion on at least one plate. Claim 8 In claim 6, a battery assembly in which at least one surface in the main body that contacts the at least one plate is insulated. Claim 9 In claim 6, the battery assembly comprises: a first side end formed at one end along a direction perpendicular to the stacking direction; and a second side end formed at the other end facing the one end. Claim 10 In claim 9, the cooling part is a battery assembly formed between the first side end and the second side end. Claim 11 In claim 9, the at least one plate comprises a battery assembly including either an inlet for injecting the fluid into either the first side end and the second side end, and an outlet for discharging the fluid. Claim 12 In claim 11, the above-mentioned Euro is a battery assembly communicating with the above-mentioned inlet and the above-mentioned outlet. Claim 13 A battery assembly according to claim 11, wherein the inlet and the outlet are formed in the first side end, and the fluid path comprises: a first fluid path communicating with the inlet and moving the fluid from the first side end toward the second side end; and a second fluid path communicating with the first fluid path and the outlet to move the fluid. Claim 14 A battery assembly according to claim 11, further comprising: a supply pipe for supplying the fluid to the inlet; and a discharge pipe for moving the fluid discharged from the outlet. Claim 15 In claim 14, the at least one plate is formed in a plurality of pieces, and the plurality of plates are connected to the supply pipe and the discharge pipe, forming a battery assembly. Claim 16 In claim 9, the first tab comprises: a first bend portion in which at least a portion is bent toward one side of one of the at least one plate; and a first connecting portion that is bent at the first bend portion and extends parallel to one side of the one plate, forming a battery assembly. Claim 17 In claim 16, the first connecting part is a battery assembly electrically connected to one side of the one plate. Claim 18 In claim 16, the battery assembly comprises: a second tap, wherein at least a portion of which is bent in a direction opposite to the direction in which the first tap is bent; and a second connecting portion that is bent in a direction opposite to the first connecting portion at the second tap and extends parallel to the one side. Claim 19 In claim 18, the second connecting portion is a battery assembly electrically connected to the other side of the other plate among the at least one plate. Claim 20 A battery assembly according to claim 1, further comprising a sensing terminal coupled to the at least one plate so as to be electrically connected to the at least one plate, for detecting the voltage or current of the plurality of battery cells. Claim 21 In claim 20, the sensing terminal further detects the temperature of the plurality of battery cells and communicates with a sensor that detects the presence or absence of gas generation or pressure in a space containing the plurality of battery cells to detect thermal runaway of the plurality of battery cells, thereby forming a battery assembly. Claim 22 A battery assembly according to claim 1, further comprising a case forming a receiving space for accommodating the plurality of battery cells and the at least one plate, wherein the at least one plate comprises an end plate additionally disposed between the plurality of battery cells and the case along the stacking direction inside the case. Claim 23 In claim 22, at least a portion of the inner surface of the receiving space is an insulated battery assembly. Claim 24 A battery assembly according to claim 22, further comprising a high-voltage terminal portion that electrically connects the plurality of battery cells and the outside of the case at the end plate.

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