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CN-116014329-B - Battery system, electric vehicle including the same, and method of mounting the same

CN116014329BCN 116014329 BCN116014329 BCN 116014329BCN-116014329-B

Abstract

The present disclosure relates to a battery system, an electric vehicle including the same, and a method of mounting the same, wherein the battery system includes a battery pack (10) including a plurality of cylindrical battery cells (12) arranged in an array with gaps (14) between adjacent battery cells (12), an electric conductor member (20) having a main portion (16) extending along a surface of the battery pack (10) and at least one branch portion (18) branching off from the main portion (16) and including at least one temperature sensor (22) for sensing a temperature of at least one of the battery cells (12), the branch portion (18) having the temperature sensor (22) extending into one of the gaps (14) between the battery cells (12), and a pin member (24, 124) inserted into the same gap (14) as the corresponding branch portion such that it presses the temperature sensor (22) on the at least one of the battery cells (12).

Inventors

  • B. Hadler
  • M. Ridisser

Assignees

  • 三星SDI株式会社

Dates

Publication Date
20260505
Application Date
20221019
Priority Date
20211021

Claims (11)

  1. 1. A battery system, comprising: A battery pack (10) comprising a plurality of cylindrical battery cells (12) arranged in an array with gaps (14) between adjacent battery cells (12); An electrical conductor element (20) having a main portion (16) extending along a surface of the battery pack (10), and at least one branch portion (18) branching from the main portion (16) and comprising at least one temperature sensor (22) for sensing a temperature of at least one of the battery cells (12), wherein the branch portion (18) having the temperature sensor (22) extends into one of the gaps (14) between the battery cells (12), and A pin element (24, 124) inserted in the same gap (14) as the respective branch portion so that it presses the temperature sensor (22) against at least one of the battery cells (12), Wherein, as the pin element (24, 124) is inserted into the gap (14), the branch portion (18) is bent by guiding of the pin element from an initial position, in which the branch portion (18) is arranged parallel to the main portion (16), to a branch position, in which the branch portion (18) branches off from the main portion (16) and into the gap (14).
  2. 2. The battery system of claim 1, wherein, The pin element (24, 124) comprises a guiding surface (25) which guides the branch portion (18) into the gap (14) when the pin element (24, 124) is inserted into the gap (14).
  3. 3. The battery system of claim 1, wherein, The electrical conductor element (20) is a flexible electrical conductor element comprising a plurality of isolated conductors, wherein the branch portion (18) is formed by at least two of the isolated conductors connected to the at least one temperature sensor (22).
  4. 4. A battery system according to claim 3, wherein the electrical conductor element (20) is a flexible flat cable.
  5. 5. The battery system of claim 1, wherein, The pin element (24, 124) includes a pin head (28) that secures the electrical conductor element (20) to the surface of the battery pack (10).
  6. 6. The battery system of claim 1, wherein, The pin element (24, 124) is made of plastic.
  7. 7. The battery system of claim 1, wherein, When the pin element (124) is inserted into the gap (14), the pin element (124) is deformed by adjacent battery cells (12) defining the gap (14).
  8. 8. The battery system of claim 7, wherein, The pin element (124) comprises a resilient rib (127) arranged perpendicular to the longitudinal extension of the pin element (124), wherein the resilient rib (127) is deformed by the adjacent battery cells (12) when the pin element (124) is inserted into the gap (14).
  9. 9. The battery system of claim 1, wherein, The branch portion (18) extends into the gap (14) such that the temperature sensor (22) is located at about half the length of the longitudinal axis of the battery cell (12) in which the branch portion is pressed.
  10. 10. An electric vehicle comprising a battery system according to any one of the preceding claims 1-9.
  11. 11. A method for mounting at least one temperature sensor (22) in a battery pack (10) comprising a plurality of cylindrical battery cells (12), wherein the method comprises the steps of: a) Providing a battery pack (10) comprising a plurality of cylindrical battery cells (12) arranged in an array with gaps (14) between adjacent battery cells (12); b) -arranging a main portion (16) of an electrical conductor element (20) along a surface of the battery pack (10); c) Inserting at least one branch portion (18) of the electrical conductor element (20) into one of the gaps (14) between the battery cells (12), the at least one branch portion branching off from the main portion (16) and comprising a temperature sensor (22) for sensing a temperature of at least one of the battery cells (12); d) Inserting a pin element (24, 124) into the same gap (14) as the respective branch portion such that it presses the temperature sensor (22) against at least one of the battery cells (12), Wherein, as the pin element (24, 124) is inserted into the gap (14), the branch portion (18) is bent by guiding of the pin element from an initial position, in which the branch portion (18) is arranged parallel to the main portion (16), to a branch position, in which the branch portion (18) branches off from the main portion (16) and into the gap (14).

Description

Battery system, electric vehicle including the same, and method of mounting the same Technical Field The present disclosure relates to a battery system including a battery pack including a plurality of cylindrical battery cells and a temperature sensor for sensing a temperature of at least one of the battery cells. The present disclosure also relates to a method for installing a temperature sensor in such a battery pack. Background In recent years, vehicles for transporting goods and personnel using electricity as a power source have been developed. Such electric vehicles are automobiles that are driven by an electric motor using energy stored in a rechargeable battery. The electric vehicle may be powered by a battery alone or may be in the form of a hybrid vehicle powered by, for example, a gasoline generator or a hydrogen fuel cell. Further, the vehicle may include a combination of an electric motor and a conventional internal combustion engine. Generally, an Electric Vehicle Battery (EVB) or traction battery is a battery used to power the drive of a Battery Electric Vehicle (BEV). Electric vehicle batteries differ from starter batteries, lighting batteries, and ignition batteries in that they are designed to provide power for a sustained period of time. Rechargeable batteries or secondary batteries differ from primary batteries in that they can be repeatedly charged and discharged, while primary batteries only provide an irreversible conversion of chemical energy into electrical energy. Low-capacity rechargeable batteries are used as power sources for small electronic devices such as mobile phones, notebook computers, and video cameras, and high-capacity rechargeable batteries are used as power sources for electric and hybrid vehicles, etc. In general, a rechargeable battery includes an electrode assembly including a positive electrode, a negative electrode, and a separator interposed therebetween, a case accommodating the electrode assembly, and an electrode terminal electrically connected to the electrode assembly. An electrolyte solution is injected into the case so that the battery can be charged and discharged through electrochemical reactions of the positive electrode, the negative electrode, and the electrolyte solution. The shape of the housing, e.g., cylindrical or rectangular, depends on the intended purpose of the battery. Lithium ion (and similar lithium polymer) batteries, which are widely known for use in laptop computers and consumer electronics, dominate the latest array of electric vehicles under development. Rechargeable batteries may be used as battery modules formed of a plurality of unit battery cells coupled in series and/or parallel in order to provide high energy content, particularly for motor drives of hybrid vehicles. That is, the battery module is formed by interconnecting electrode terminals of a plurality of unit battery cells according to the amount of electricity required and in order to realize a high-power rechargeable battery. The battery module may be constructed in a block design or a modular design. In a block design, each cell is coupled to a common current collector structure and a common battery management system, the units of which are disposed in a housing. In a modular design, a plurality of battery cells are connected to form a sub-module, and several sub-modules are connected to form a battery module. In automotive applications, a battery system is typically composed of a plurality of battery modules connected in series for providing a desired voltage. Wherein the battery module may include a sub-module having a plurality of stacked battery cells, each stack including cells (XpYs) connected in series or a plurality of cells (XsYp) connected in parallel connected in series. The battery pack is a set of any number (preferably identical) of battery modules. They may be configured in series, parallel, or a mixture of series and parallel to deliver a desired voltage, capacity, or power density. The components of the battery pack include individual battery modules and interconnections providing electrical conductivity therebetween. The battery system further includes a Battery Management System (BMS), which is any electronic system that manages the rechargeable battery, the battery module, and the battery pack, such as by protecting the battery from operation outside its safe operating area, monitoring their status, calculating secondary data, reporting the data, controlling its environment, verifying it, and/or balancing it. For example, the BMS may monitor a battery state represented by a voltage (such as a total voltage of the battery pack or the battery module, a voltage of the individual cells), a temperature (such as an average temperature of the battery pack or the battery module, a coolant inlet temperature, a coolant outlet temperature, or a temperature of the individual battery cells), a coolant flow rate (such as a flow rate, a coolant pressure), and a c