High voltage battery pack for vehicle

Abstract

The present invention relates to a high-voltage battery pack for a vehicle, wherein NVH performance improvement, durability improvement, and safety against side collisions can be secured through a first elastic pad (40) coupled to a bus bar (30), a second elastic pad (50) coupled to an upper case (11), and a third elastic pad (80) installed between an outer side member (70) and an end plate (22) of a battery module (20), and strength and rigidity are reinforced by an outer side member (70) coupled to a lower case (12), a first cross member (90), a second cross member (100), and a longitudinal member (110), thereby enabling the collision energy to be transferred to the vehicle body in the event of an accident.

Description

Technology Field

[0001] The present invention relates to a high-voltage battery pack for vehicles, and more specifically, to a technology for a high-voltage battery pack for vehicles configured to ensure durability and collision stability by applying an elastic pad and a member member. Background Technology

[0002] Hybrid electric vehicles, fuel cell vehicles, electric vehicles, and eco-friendly vehicles are all configured to drive the vehicle using an electric motor, and are necessarily equipped with a high-voltage battery pack that supplies driving power to the electric motor.

[0003] A high-voltage battery pack typically includes a battery case, multiple battery modules mounted within the battery case, and a Battery Management System (BMS) that detects the voltage, current, and temperature of each unit cell constituting the battery module and controls their operation.

[0004] The battery case includes an upper case and a lower case, and a plurality of battery modules and a BMS are mounted within the lower case, and the structure is such that the upper case covers the lower case in which the battery modules and the BMS are mounted.

[0005] In addition, the battery module includes multiple stacked battery cells, a pair of end plates connected to the left and right sides of the stacked battery cells to protect the battery cells, and a pair of sensing blocks connected to the front and back sides of the stacked battery cells to electrically connect the battery cells to each other.

[0006] Meanwhile, as the number of high-performance luxury vehicles increases, the energy capacity requirements for batteries also rise; to meet this, battery sizes increase, and the number of installed batteries also grows.

[0007] As such, when a large number of batteries are installed within the limited space of a battery case to achieve the required energy, measures will be necessary to ensure the overall durability (NVH) of the high-voltage battery pack and safety against collisions.

[0008] The matters described above as background technology are intended only to enhance understanding of the background of the present invention and should not be construed as an acknowledgment that they constitute prior art already known to those skilled in the art. Prior art literature

[0009] Republic of Korea Published Patent Application No. 10-2013-0032959 The problem to be solved

[0010] The present invention is configured as a high-voltage battery pack for vehicles in which a plurality of elastic pads are applied to the battery case and busbar, and a plurality of member components are applied to the lower case, thereby ensuring the overall durability performance and stability against collisions of the high-voltage battery pack. means of solving the problem

[0011] The present invention, for achieving the above-mentioned purpose, comprises a vehicle high-voltage battery pack including an upper case, a lower case, and a plurality of battery modules mounted on the lower case, and further comprises: a busbar positioned above the battery modules and electrically connecting the battery modules to each other; and a plurality of first elastic pads coupled to the busbar.

[0012] The battery module comprises a top cover covering the upper portion of the stacked battery cells and end plates arranged to cover the left and right portions of the battery cells; and the first elastic pad is characterized by being coupled to be positioned on the top of the top cover or on the top of the end plates.

[0013] It further includes a plurality of second elastic pads coupled to the outer upper surface of the upper case; and is characterized in that a portion of the second elastic pads overlaps with the first elastic pad in the same plane.

[0014] It further includes a plurality of second elastic pads coupled to the outer upper surface of the upper case; and is characterized in that a portion of the second elastic pads is in contact with the vehicle body or a part connected to the vehicle body.

[0015] It is further characterized by including: an outer side member provided in the lower case and coupled to the vehicle body; and a plurality of third elastic pads disposed between the outer side member and the end plate of the battery module.

[0016] The device further includes a first cross member coupled to the lower case so as to extend in the front-rear direction and a plurality of second cross members coupled so as to extend in the left-right direction; and the battery module mounted on the lower case is installed to be connected to the first cross member and the second cross members.

[0017] It is further characterized by including a plurality of longitudinal members connecting the front and rear edges of the lower case and the second cross members respectively positioned at the front and rear ends of the lower case.

[0018] A portion of the above-mentioned member is characterized by being connected to the end plate of the battery module.

[0019] It further includes an outer side member provided in the lower case and coupled to the vehicle body; and the outer side member, the first cross member, the second cross member, and the longitudinal member form a load path against external impact. Effects of the invention

[0020] A high-voltage battery pack according to an embodiment of the present invention can improve NVH performance and durability through a first elastic pad coupled to a busbar, a second elastic pad coupled to an upper case, and a third elastic pad installed between an outer side member and an end plate of a battery module, and in particular, the third elastic pad can absorb side collision energy, thereby having the effect of ensuring safety against side collisions.

[0021] In addition, the high-voltage battery pack according to the present invention has the effect of improving durability by reinforcing strength and rigidity through the outer side member, the first cross member, the second cross member, and the longitudinal member coupled to the lower case, and particularly by being able to perform the role of a load path that transmits collision energy toward the vehicle body in the event of an accident. Brief explanation of the drawing

[0022] FIG. 1 is a drawing for explaining a high-voltage battery pack for a vehicle according to the present invention, a drawing in which the upper case is separated, FIG. 2 is an exploded view of a battery module, FIG. 3 is a drawing for explaining a first elastic pad coupled to a busbar according to the present invention, FIG. 4 is a cross-sectional view illustrating a first elastic pad coupled to a busbar and a second elastic pad coupled to an upper case according to the present invention. FIG. 5 is a cross-sectional view illustrating a third elastic pad disposed between an outer side member of a lower case and an end plate of a battery module according to the present invention. FIG. 6 is a drawing for explaining the first cross member, the second cross member, and the longitudinal member provided in the lower case according to the present invention. Specific details for implementing the invention

[0023] Specific structural or functional descriptions of the embodiments of the present invention disclosed in this specification or application are merely illustrative for the purpose of explaining embodiments according to the present invention, and embodiments according to the present invention may be implemented in various forms and should not be interpreted as being limited to the embodiments described in this specification or application.

[0024] Since embodiments according to the present invention may be subject to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention.

[0025] Terms such as "first," "second," etc., may be used to describe various components, but said components shall not be limited by said terms. For the sole purpose of distinguishing one component from another, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0026] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions describing the relationship between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," should be interpreted in the same way.

[0027] The terms used herein are merely for describing specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0028] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0029] A control unit (controller) according to an exemplary embodiment of the present invention may be implemented through a non-volatile memory (not shown) configured to store data relating to an algorithm configured to control the operation of various components of a vehicle or software instructions for executing said algorithm, and a processor (not shown) configured to perform the operation described below using the data stored in said memory. Here, the memory and the processor may be implemented as separate chips. Alternatively, the memory and the processor may be implemented as a single chip integrated with each other. The processor may take the form of one or more processors.

[0030] Hereinafter, a high-voltage battery pack for a vehicle according to a preferred embodiment of the present invention will be examined with reference to the attached drawings.

[0031] Vehicles using an electric motor as a power source are essentially equipped with a high-voltage battery pack that provides driving power to the electric motor.

[0032] As shown in FIGS. 1 to 6, the high-voltage battery pack according to the present invention includes a battery case (10), a plurality of battery modules (20) mounted inside the battery case (10), and a Battery Management System (BMS) that detects the voltage, current, temperature, etc. of each unit cell constituting the battery module (20) and controls the operation.

[0033] The battery case (10) includes an upper case (11) and a lower case (12), and a plurality of battery modules (20) and a BMS are mounted inside the lower case (12), and the upper case (11) covers the lower case (12) on which the battery modules (20) are mounted.

[0034] And, the battery module (20) includes a plurality of stacked battery cells (21), a pair of end plates (22) that are connected to the left and right sides of the stacked battery cells (21) to protect the battery cells (21), a pair of sensing blocks (23) that are connected to the front and back sides of the stacked battery cells (21) to electrically connect the battery cells (21) to each other, and a top cover (24) that covers the top of the stacked battery cells (21).

[0035] The end plates (22) are composed of two and are positioned on the left and right sides to face each other with the stacked battery cells (21) in between, and are formed as rigid bodies for the protection of the battery cells (21) and for controlling the swelling reaction force of the cells.

[0036] The sensing block (23) is also composed of two parts and is arranged in the front and back so as to face each other with the stacked battery cell (21) in between, and serves to electrically connect the battery cell (21) and the cell.

[0037] A high-voltage battery pack (1) according to an embodiment of the present invention further includes a bus bar (30) positioned above a battery module (20) and electrically connecting the battery modules (20) to each other, and a plurality of first elastic pads (40) coupled to the bus bar (30).

[0038] The first elastic pad (40) can be formed of a rubber or silicone material having elasticity, and a plurality of them are connected to the bus bar (30) at a predetermined interval and fixed thereto, thereby improving NVH (Noise Vibration Harshness) performance and durability.

[0039] For secure connection of the first elastic pad (40), the first elastic pad (40) can be connected to the bus bar (30) so as to be placed on the top of the top cover (24) constituting the battery module (20) or on the top of the end plate (22).

[0040] In addition, the high-voltage battery pack (1) according to the embodiment of the present invention further includes a plurality of second elastic pads (50) coupled to the outer upper surface of the upper case (11).

[0041] The second elastic pad (50) can be formed of an elastic rubber or silicone material and is coupled to be fixed to the upper surface of the upper case (11) along the front-rear and left-right directions, thereby improving NVH (Noise Vibration Harshness) performance and durability.

[0042] The second elastic pad (50) is positioned above the first elastic pad (40) with the upper case (11) in between, and a part of the second elastic pad (50) can be positioned to overlap with the first elastic pad (40) in the same plane, thereby further enhancing the insulation effect of vibration noise.

[0043] When the battery case (10) is coupled to and mounted on the vehicle body, a portion of the second elastic pad (50) is installed to make contact with the vehicle body (61) or a part (62) connected to the vehicle body, thereby further improving NVH performance and durability.

[0044] In addition, the high-voltage battery pack (1) according to the embodiment of the present invention further includes an outer side member (70) provided in a lower case (12) and coupled to a vehicle body, and a plurality of third elastic pads (80) disposed between the outer side member (70) and the end plate (22) of the battery module (20).

[0045] The outer side member (70) is joined to the lower case (12) in a left-right position and is joined in a structure that extends in the front-rear direction.

[0046] The third elastic pad (80) can be formed of an elastic rubber or silicone material and is fixed to the outer side member (70) and installed to contact the end plate (22) of the battery module (20) to improve NVH performance and durability, and in particular, has the advantage of ensuring safety against side collisions by being able to absorb side collision energy.

[0047] In addition, the high-voltage battery pack (1) according to the embodiment of the present invention further includes a first cross member (90) coupled to the lower case (12) so as to extend in the front-rear direction and a plurality of second cross members (100) coupled so as to extend in the left-right direction.

[0048] The first cross member (90) is a member member installed parallel to the surface of the battery cell (21) mounted on the lower case (12), and the second cross member (100) is a member member installed perpendicular to the surface of the battery cell (21) mounted on the lower case (12).

[0049] The first cross member (90) and the second cross member (100) serve to reinforce the strength and rigidity of the lower case (12), and in the event of an accident, they can perform the role of a load pass that transmits collision energy to the vehicle body, thereby further improving durability.

[0050] The battery module (20) mounted on the lower case (12) can be installed to be connected to the first cross member (90) and the second cross member (100), thereby allowing the battery module (20) to be installed more robustly and stably, which helps improve NVH performance and durability.

[0051] In addition, the high-voltage battery pack (1) according to the embodiment of the present invention further includes a plurality of longitudinal members (110) connecting the front and rear edges of the lower case (12) and the second cross members (100) respectively disposed at the front and rear ends of the lower case (12).

[0052] The member (110) serves to reinforce the strength and rigidity of the lower case (12) together with the first cross member (90) and the second cross member (100), and can perform the role of a load pass that transmits collision energy to the vehicle body in the event of an accident, thereby further improving durability.

[0053] A portion of the member (110) can be installed to be connected to the end plate (22) that constitutes the battery module (20), thereby allowing the battery module (20) to be installed more robustly and stably, which helps improve NVH performance and durability.

[0054] The lower case (12) constituting the battery case (10) is configured by combining a panel member forming the bottom, the aforementioned outer side member (70), the first cross member (90) and the second cross member (100), and a plurality of longitudinal members (110). The outer side member (70) is installed by being combined with the vehicle body (61), and the second elastic members (50) combined with the upper case (11) are installed to make contact with the vehicle body (61) or a part (62) connected to the vehicle body.

[0055] Accordingly, when collision energy generated during a collision is transferred to a high-voltage battery pack (1) mounted on the vehicle, the outer side member (70), the first cross member (90), the second cross member (100), and a plurality of longitudinal members (110) form a load path to transfer and disperse the collision energy toward the vehicle body, thereby improving durability and ensuring stability against collisions.

[0056] As described above, the high-voltage battery pack (1) according to the embodiment of the present invention can improve NVH performance and durability through a first elastic pad (40) coupled to a bus bar (30), a second elastic pad (50) coupled to an upper case (11), and a third elastic pad (80) installed between an outer side member (70) and an end plate (22) of a battery module (20). In particular, the third elastic pad (80) has the advantage of ensuring safety against side collisions as it can absorb side collision energy.

[0057] In addition, the high-voltage battery pack (1) according to the present invention has the advantage of being able to improve durability by reinforcing strength and rigidity through the outer side member (70), the first cross member (90), the second cross member (100), and the longitudinal member (110) coupled to the lower case (12), and particularly by being able to perform the role of a load path that transmits collision energy toward the vehicle body in the event of an accident.

[0058] Although the present invention has been illustrated and described in relation to specific embodiments, it will be obvious to those skilled in the art that the present invention can be modified and changed in various ways without departing from the technical spirit of the invention as provided by the following claims. Explanation of the symbols

[0059] 1 - High voltage battery pack 10 - Battery case 11 - Upper case 12 - Lower case 20 - Battery Module 21 - Battery Cell 22 - End plate 23 - Sensing block 24 - Top cover 30 - Busbar 40 - 1st elastic pad 50 - 2nd elastic pad 61 - Body 62 - Parts connected to the body 70 - Outer side member 80 - Third elastic pad 90 - 1st Cross Member 100 - 2nd Cross Member 110 - Jong member

Claims

Claim 1 A high-voltage battery pack for a vehicle comprising an upper case, a lower case, and a plurality of battery modules mounted on the lower case, further comprising: a busbar positioned above the battery modules and electrically connecting the battery modules to each other; a plurality of first elastic pads coupled to the busbar; an outer side member provided on the lower case and coupled to the vehicle body; and a plurality of third elastic pads positioned between the outer side member and the end plate of the battery module. Claim 2 A high-voltage battery pack for a vehicle according to claim 1, wherein the battery module comprises a top cover covering the upper side of a stacked battery cell and an end plate arranged to cover the left and right sides of the battery cell; and wherein the first elastic pad is coupled to be positioned on the top of the top cover or on the top of the end plate. Claim 3 A high-voltage battery pack for a vehicle according to claim 1, further comprising a plurality of second elastic pads coupled to the outer upper surface of the upper case; wherein a portion of the second elastic pads overlaps coplanarly with the first elastic pad. Claim 4 A high-voltage battery pack for a vehicle according to claim 1, further comprising a plurality of second elastic pads coupled to the outer upper surface of the upper case; wherein a portion of the second elastic pads is in contact with a vehicle body or a part connected to the vehicle body. Claim 5 delete Claim 6 A high-voltage battery pack for a vehicle according to claim 1, further comprising a first cross member coupled to the lower case so as to extend in the front-rear direction and a plurality of second cross members coupled so as to extend in the left-right direction; wherein a battery module mounted on the lower case is installed to be connected to the first cross member and the second cross members. Claim 7 A high-voltage battery pack for a vehicle according to claim 6, further comprising a plurality of longitudinal members connecting the front and rear edges of the lower case and the second cross members respectively disposed at the front and rear ends of the lower case. Claim 8 A high-voltage battery pack for a vehicle according to claim 7, characterized in that a portion of the member is connected to the end plate of the battery module. Claim 9 A high-voltage battery pack for a vehicle according to claim 7, further comprising an outer side member provided in the lower case and coupled to the vehicle body; wherein the outer side member, the first cross member, the second cross member, and the longitudinal member form a load path against external impact.

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