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CN-122026016-A - Battery and battery pack including the same

CN122026016ACN 122026016 ACN122026016 ACN 122026016ACN-122026016-A

Abstract

The present disclosure relates to a battery and a battery pack including the same. The battery includes a case, an electrode assembly including a plurality of electrodes parallel to each other in a first direction inside the case, a tab member including a plurality of electrode tabs extending from the plurality of electrodes in a one-to-one manner, the plurality of electrode tabs including a first electrode tab, a cap assembly facing the electrode assembly, the cap assembly including a terminal, and a current collector assembly including a current collector connected to the terminal and a current collector plate connected to the tab member between the electrode assembly and the cap assembly, and the current collector plate including a slit through which the first electrode tab passes.

Inventors

  • DING YANHU
  • LIN XIANYING

Assignees

  • 三星SDI株式会社

Dates

Publication Date
20260512
Application Date
20250922
Priority Date
20241112

Claims (17)

  1. 1. A battery, comprising: A housing; An electrode assembly including a plurality of electrodes parallel to each other in a first direction inside the case; A tab member including a plurality of electrode tabs extending from the plurality of electrodes in a one-to-one manner, the plurality of electrode tabs including a first electrode tab; A cap assembly facing the electrode assembly, the cap assembly including a terminal, and A current collector assembly including a current collector connected to the terminal and a current collector plate connected to the tab member, and including a slit through which the first electrode tab passes, between the electrode assembly and the cap assembly.
  2. 2. The battery of claim 1, wherein the first electrode tab passing through the slit is bonded to one surface of the current collector plate.
  3. 3. The battery of claim 2, wherein the plurality of electrode tabs further comprises a second electrode tab that does not pass through the slit, the second electrode tab being joined to another surface of the current collector plate.
  4. 4. The battery of claim 2, wherein the slit extends in a second direction that intersects the first direction.
  5. 5. The battery according to claim 4, wherein the first electrode tab passing through the slit is joined to the one surface of the current collector plate on an opposite side of the slit in the first direction.
  6. 6. The battery of claim 5, wherein the slit is located at a center of the current collector plate in the first direction.
  7. 7. The battery of claim 4, wherein the slit has a width that satisfies equation 1, [ Equation 1] t×n≤W≤t×n+1.2~2.0mm, Wherein W represents the width of the slit, t represents the thickness of one of the first electrode tabs, and n represents the number of the first electrode tabs.
  8. 8. A battery, comprising: A housing; an electrode assembly including a plurality of positive electrodes and a plurality of negative electrodes alternating in a first direction inside the case; a positive electrode tab member including a plurality of positive electrode tabs extending from the plurality of positive electrodes in a one-to-one manner; A negative electrode tab member spaced apart from the positive electrode tab member in a second direction intersecting the first direction, the negative electrode tab member including a plurality of negative electrode tabs extending from the plurality of negative electrodes in a one-to-one manner; A cap assembly facing the electrode assembly, the cap assembly including a positive electrode terminal and a negative electrode terminal; A positive electrode current collector assembly including a positive electrode current collector connected to the positive electrode terminal and a positive electrode current collector plate connected to the positive electrode tab member, and including a first slit through which first positive electrode tabs, which are some of the plurality of positive electrode tabs, pass, between the electrode assembly and the cap assembly, and A negative electrode current collector assembly including a negative electrode current collector connected to the negative electrode terminal and a negative electrode current collector plate connected to the negative electrode tab member, and including a second slit through which first negative electrode tabs, which are some of the plurality of negative electrode tabs, pass, between the electrode assembly and the cap assembly.
  9. 9. The battery of claim 8, wherein: the first positive electrode tab passing through the first slit is joined to one surface of the positive electrode current collector plate, and The first negative electrode tab passing through the second slit is joined to one surface of the negative electrode current collector plate.
  10. 10. The battery of claim 9, wherein: a second positive electrode tab, which is a remaining positive electrode tab among the plurality of positive electrode tabs that does not pass through the first slit, is joined to the other surface of the positive electrode current collector plate, and A second negative electrode tab, which is a remaining negative electrode tab among the plurality of negative electrode tabs that does not pass through the second slit, is joined to the other surface of the negative electrode current collector plate.
  11. 11. The battery of claim 9, wherein each of the first and second slots extends in the second direction.
  12. 12. The battery of claim 11, wherein: the first positive electrode tab passing through the first slit is joined to the one surface of the positive electrode current collector plate on the opposite side of the first slit in the first direction, and The first negative electrode tab passing through the second slit is joined to the one surface of the negative electrode current collector plate at an opposite side of the second slit in the first direction.
  13. 13. The battery of claim 12, wherein: the first slit is located at the center of the positive electrode collector plate in the first direction, and The second slit is located at a center of the negative electrode current collector plate in the first direction.
  14. 14. The battery of claim 12, wherein: the width of the first slit satisfies equation 2, The width of the second slit satisfies equation 3, [ Equation 2] t1×n1≤W1≤t1×n1+1.2~2.0mm, [ Equation 3] t2×n2≤W2≤t2×n2+1.2~2.0mm, W1 represents the width of the first slit, T1 represents the thickness of one of the first positive electrode tabs, N1 represents the number of the first positive electrode tabs, W2 represents the width of the second slit, T2 represents the thickness of one of the first negative electrode tabs, and N2 represents the number of the first negative electrode tabs.
  15. 15. The battery of claim 14, wherein the width of the first slit is equal to the width of the second slit.
  16. 16. The battery of claim 14, wherein the width of the first slit is greater than the width of the second slit.
  17. 17. A battery pack, comprising: A housing, and A plurality of batteries, each of the plurality of batteries being a battery according to any one of claims 1 to 16, inside the housing.

Description

Battery and battery pack including the same Cross Reference to Related Applications The present application claims priority and rights of korean patent application No. 10-2024-0159720 filed on the korean intellectual property office on day 11 and 12 of 2024, the entire disclosure of which is incorporated herein by reference. Technical Field The present disclosure relates to a battery and a battery pack including the same. Background Unlike a primary battery that cannot be recharged, a secondary battery is a type of battery that can be recharged and discharged. The low-capacity secondary battery may be used for portable small-sized electronic devices such as smart phones, function phones, notebook computers, digital cameras, and camcorders, and the high-capacity secondary battery is widely used as a power source and a power storage battery for driving a motor in a hybrid vehicle or an electric vehicle. Such a secondary battery may include an electrode assembly having a positive electrode and a negative electrode, a case accommodating the electrode assembly, an electrode terminal connected to the electrode assembly, and the like. With the progress of technology, secondary batteries having high capacity are demanded. Accordingly, a plurality of secondary batteries may be electrically connected and used. For example, the secondary battery may be applied to the electronic device in the form of a battery module including a plurality of secondary batteries and/or a battery pack including a plurality of battery modules. According to an embodiment, the battery pack is also configured by a plurality of secondary batteries. In this case, the electronic device is an electronic device that requires high power and/or high capacity, and includes, for example, an electric vehicle and the like. The secondary battery may include an electrode assembly in which positive electrodes, separators, and negative electrodes are alternately arranged. The electrode assembly may be accommodated inside the case. A plurality of positive and negative electrodes (hereinafter, referred to as "electrodes") constituting the electrode assembly may be electrically connected to the outside through positive and negative electrode tabs (hereinafter, referred to as "electrode tabs"), respectively. That is, the plurality of positive electrode tabs and the plurality of negative electrode tabs may be electrically connected to a positive electrode terminal and a negative electrode terminal (hereinafter referred to as "electrode terminals") mounted on the cap plate, respectively. In order to establish electrical connection between the plurality of electrode tabs and the electrode terminals, a connection assembly including one or more connection members may be disposed between the plurality of electrode tabs and the electrode terminals. The connection assembly may electrically connect the plurality of electrode tabs to the electrode terminal by bonding a portion thereof to the plurality of electrode tabs and bonding another portion thereof to the electrode terminal. In the connection assembly, the connection member coupled to the plurality of electrode tabs and the connection member coupled to the electrode terminal may be different parts of a single structure or separate structures coupled together. Such a connection assembly may be called a current collector assembly, which performs the function of collecting current supplied from a plurality of electrode tabs and transmitting the current to an electrode terminal. The shape and configuration of the current collector assembly may be variously implemented according to the type, internal structure, specification, etc. of the secondary battery. The above information disclosed in the background of the present disclosure is only intended to enhance understanding of the background of the present disclosure and thus may include information that does not constitute a related art. Disclosure of Invention According to an aspect of the present disclosure, there is provided a battery including a case, an electrode assembly disposed inside the case and including a plurality of electrodes disposed parallel to each other in a first direction, a tab member including a plurality of electrode tabs extending from the plurality of electrodes in a one-to-one manner, a cap assembly disposed to face the electrode assembly and including terminals, and a current collector assembly disposed between the electrode assembly and the cap assembly and including a current collector connected to the terminals and a current collector plate connected to the tab member, wherein the current collector plate includes slits through which the first electrode tabs, which are some of the plurality of electrode tabs, pass. According to an aspect of the embodiment, the first electrode tab passing through the slit may be coupled to one surface of the current collector plate. In addition, a second electrode tab, which is the remaining electrode tab am