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EP-3651236-B1 - BATTERY MODULE AND BATTERY PACK COMPRISING SAME

EP3651236B1EP 3651236 B1EP3651236 B1EP 3651236B1EP-3651236-B1

Inventors

  • KEUM, JONG YOON

Dates

Publication Date
20260506
Application Date
20181012

Claims (4)

  1. A battery pack (1000) configured from a plurality of modules (100) comprising a plurality of battery cells (110), the battery pack (1000) comprising: a first battery module (100) having a positive electrode busbar (130) and a negative electrode busbar (140) spaced apart from each other on one side surface of the first battery module (100); a second battery module (200) having a positive electrode busbar (130) and a negative electrode busbar (140) spaced apart from each other on one side surface of the second battery module (200); and a busbar connection part (300) configured to electrically connect the positive electrode busbar (130) of the first battery module (100) and the negative electrode busbar (140) of the second battery module (200) or the negative electrode busbar (140) of the first battery module (100) and the positive electrode busbar (130) of the second battery module (200), wherein each of the positive electrode busbars (130) of the first battery module (100) and the second battery module (200) comprises: a positive electrode coupling part (131) on one surface of a module case (120) which accommodates the plurality of battery cells (110), and configured to electrically connect the positive (+) electrodes of the battery cells (110) adjacent to each other; and a positive electrode terminal extension part (132) extending in one side surface to be vertically bent from the positive electrode coupling part (131), and wherein each of the negative electrode busbar (140) faces the positive electrode busbar (130) and is configured to include: a negative electrode coupling part (141) on another surface of the module case (120), configured to electrically connect the negative (-) electrodes of the battery cells (110) adjacent to each other; and a negative electrode terminal extension part (142) extending in the same one side surface to be vertically bent from the negative electrode coupling part (141), and wherein the busbar connection part (300) contacts and connects the positive electrode terminal extension part (132) of the positive electrode busbar (130) and the negative electrode terminal extension part (142) of the negative electrode busbar (140), wherein the positive electrode terminal extension part (132) and the negative electrode terminal extension part (142) are on the same one side surface to be spaced apart from each other and the positive electrode terminal extension part (132) and the negative electrode terminal extension part (142) performs electrical connection to another battery module through the busbar connection part (300), and thus are disposed on the same one side surface to allow the connection between the first battery module (100) and the second battery module (200) to be performed in one direction, the positive electrode terminal extension part (132) and the negative electrode terminal extension part (142) form side surface extension parts (160) spaced apart a predetermined distance from each other for connecting the busbar connection part (300), and allow the connection to the busbar connection part (300) to be performed on the side surface extension parts (160).
  2. The battery pack (1000) of claim 1, wherein the positive electrode busbar (130) and the negative electrode busbar (140) of the first battery module (100), and the positive electrode busbar (130) and the negative electrode busbar (140) of the second battery module (200) are positioned on respective side surfaces of each of the first and second battery modules (100) in the same direction.
  3. The battery pack (1000) of claim 1, further comprising: a lower case (400) having an inner bottom surface having a plate-like shape and configured to accommodate therein the first battery module (100) and the second battery module (200); and an upper case (500) having a shape corresponding to the lower case (400) and configured to cover upper portions of the first battery module (100) and the second battery module (200).
  4. A device including a battery pack (1000) of any one of claims 1 to 3.

Description

TECHNICAL FIELD The present invention relates to a battery pack including battery modules, and more particularly, to a battery pack comprising battery modules including busbars having the same shape and connected to a positive (+) electrode terminal and a negative (-) electrode terminal of each of a plurality of battery cells, and to a battery pack provided with a busbar connection part which electrically connects and couples the modules through the busbar in the same side surface part of each of the plurality of battery modules. BACKGROUND ART Lithium secondary batteries, as unit cells constituting a battery pack, have flexibility to thereby have relatively free shapes, are lightweight, and also have excellent safety, and thus, the demand for the lithium secondary batteries increases as power sources for portable electronic apparatuses such as mobile phones, camcorders, and laptop computers, and the secondary batteries are being widely used for middle and large sized apparatuses such as automobiles and power storage devices. Meanwhile, secondary batteries are classified according to the shape of the battery case. When the electrode assembly is embedded in a cylindrical or prismatic metal can, the secondary battery is classified into the cylindrical battery or the prismatic battery, and when the electrode assembly is embedded in a pouch-type case of an aluminum laminate sheet, the secondary battery is classified into the pouch-type battery. In addition, an electrode assembly contained in the battery case is composed of a positive electrode, a negative electrode, and a separator inserted between the positive electrode and the negative electrode, and can be charged/discharged, and the cylindrical electrode assembly is formed in a jelly-roll type in which a positive electrode, a separator, and a negative electrode each having a long sheet shape are sequentially laminated and wound. The aforementioned batteries are classified as one battery cell, and a plurality of battery cells are connected in series or in parallel to thereby form a single module, and when a plurality of such modules are connected, a single battery pack is formed. The plurality of modules are electrically connected through a busbar, which will be described in more detail with reference to FIG. 1. FIG. 1 is a structural view of a conventional battery pack. Referring to FIG. 1, in a conventional battery pack, in order to electrically connect battery modules to each other, electrodes of each module are disposed so as to be arranged alternately. That is, in order to connect, in series, a plurality of battery modules in each of which a plurality of battery cells are connected in parallel, predetermined battery modules are rotated and electrically connected. However, such work causes a problem in that since the battery modules are rotated, the efficiency of battery pack assembly is degraded, and the production time increases. [Related art document] [Patent document] (Patent document 1) KR2015-0084661 A(Patent document 2) WO 2013/018151 A1(Patent document 3) US 2013/230761 A1(Patent document 4) US 2015/325824 A1(Patent document 5) US 2011/293998 A1 WO 2013/018151 A1 concerns a battery module with multiple unit cells having a discharge part for discharging outside the gas generated inside a battery and first and second pole connecting bodies connecting each respective pole of the unit cells and also adjacent unit cells with each other. US 2013/0230761 A1 concerns a battery module in which a gap at a bonding section between a positive electrode bus bar and a negative electrode bus bar is less likely to be formed in a bonding process. US 2015/0325824 A1 concerns a battery block including a plurality of cells having a cylindrical outer shape, which are held in a case by two holders disposed at opposing sides of the case, made of an isolator. DISCLOSURE OF THE INVENTION TECHNICAL PROBLEM It is an object of the present invention to provide a battery pack including battery modules quickly assembled with an enhanced efficiency of assembly. TECHNICAL SOLUTION In accordance with the invention, a battery pack is as defined in the attached set of claims and is configured to include a plurality of modules including a plurality of battery cells, the battery pack including: a first battery module having a positive electrode busbar and a negative electrode busbar disposed to be spaced apart from each other on one side surface of the first battery module; a second battery module having a positive electrode busbar and a negative electrode busbar disposed to be spaced apart from each other on one side surface of the second battery module; and a busbar connection part configured to electrically connect the positive electrode busbar of the first battery module and the negative electrode busbar of the second battery module or the negative electrode busbar of the first battery module and the positive electrode busbar of the second battery module. The positive electrode bu