A system measuring battery cell temperature

Abstract

The present invention relates to a system (1) which enables the cell (2.1) temperatures during the use of the battery (2) to be measured by homogeneously integrating nanotubes into the foam (3) placed on the cell (2.1) in lithium-based batteries (2).

Description

[0001] A SYSTEM MEASURING BATTERY CELL TEMPERATURE

[0002] Technical Field

[0003] The present invention relates to a system which enables the cell temperatures during the use of the battery to be measured by homogeneously integrating nanotubes into the foam placed on the cell in lithium-based batteries.

[0004] Background of the Invention

[0005] Any electrically powered vehicle and / or device in the form of an electric vehicle, portable device, storage system and / or vessel operates by storing electrical energy on a battery thereof and / or using the stored energy. In today's technology, the use of the said lithium batteries is widespread, and the temperatures increase throughout the use duration (charging and discharging) of the battery cells thereof. As a result of the increasing temperature, the electrochemical structure of the cells is disrupted by being overheated, causing a short circuit to occur on the cell. For this reason, it becomes important in battery use to enable the cells to be controlled by monitoring the increasing cell temperatures. In today's applications, cell temperatures are measured by means of additional elements placed on the battery in the form of sensors. However, the use of additional elements in the said applications may cause extra costs, as well as the sensor included in the battery cannot provide a homogeneous measurement on each cell.

[0006] For this reason, in the state of art, there is a need for a system which enables a precise and reliable temperature measurement on the cells included in the battery by means of nanotubes integrated into a foam that provides thermal insulation and damping of expansion between the cells by being placed inside the battery. The Chinese patent document no. CN116207422A, an application included in the state of the art, discloses a mechanism for providing protection from thermal runaway by using fireproof material in the assemblies around the batteries in electric vehicles. The invention consists of a power battery, pressure sensor, BMS main controller and low-voltage wiring fixed between the lower box assembly and the upper box assembly. The pressure sensor is located outside the upper box and inside the cover and is fixedly connected to the stud with the first fixing nut. The BMS main controller is positioned outside the upper box and inside the cover and is fixedly connected to the stud with the second fixing nut. The low-voltage wire harness passes through the low-voltage harness passage hole in order to connect to the pressure sensor and the BMS main controller. Inside the upper box assembly, there is a layer of non-combustible material that protects the internal components of the battery against high temperature and pressure with the aim of protecting the interior of the battery from possible external influences. Suitable low-voltage or high-voltage components can be placed outside the upper box and connected to the battery pack via low-voltage wiring harnesses or high-voltage connections. The first foam located on the inside of the upper box assembly and the second foam located on the outside protect the inside and outside of the battery. In the upper box assembly, the first foam is pasted on the inside of the upper box and between the upper box and the battery core, and the second foam is pasted on the outside of the upper box, between the upper box and the vehicle floor. The foam structures absorb the vibrations of the battery and increase the durability of the battery by reducing the stress caused by impacts. The pressure sensor and BMS main controller included in the upper box assembly improve the thermal runaway protection capacity of the power battery against potential hazards caused by external factors and pressure changes. When thermal diffusion occurs due to thermal runaway of the battery, the power battery will produce a large amount of high-temperature and high-pressure ejections, posing a challenge to the protection of the battery system. In order to protect the power battery, a fireproof plate is placed between the upper box and the battery core to dampen and protect the power battery against thermal runaway. In this way, the internal structure of the battery can operate in a durable and safe manner for a longer period of time.

[0007] Summary of the Invention

[0008] An object of the present invention is to realize a system which enables the cell temperatures during the use of the battery to be measured by homogeneously integrating nanotubes into the foam placed on the cell in lithium-based batteries.

[0009] Detailed Description of the Invention

[0010] “A System Measuring Battery Cell Temperature” realized to fulfd the objectives of the present invention is shown in the figures attached, in which:

[0011] Figure 1 is a general view of an inventive system measuring battery cell temperature.

[0012] Figure 2 is a sectional view of the parts included in an inventive system measuring battery cell temperature.

[0013] Figure 3 is a perspective view of the parts included in an inventive system measuring battery cell temperature.

[0014] The components illustrated in the figures are individually numbered, where the numbers refer to the following:

[0015] 1. System

[0016] 2. Battery

[0017] 2.1. Cell

[0018] 3. Foam

[0019] 4. Insulating layer

[0020] 5. Measurement element

[0021] 6. Control unit An inventive system (1) which enables the temperature measurement to be carried out comprises at least one battery (2) which includes more than one cell (2.1) that enables the electrical energy to be stored and / or the stored energy to be used thereon; at least one foam (3) which is positioned in such a way as to be on the cells (2.1) located on the battery (2) and enables the cell (2.1) to generate resistance over the expansion that occurs during its use; at least one insulating layer (4) which enables an electrical insulation to be realized between the foam (3) and the cell (2.1) by being located on each surface of the foam (3); at least one measurement element (5) which enables the resistance generated on the foam (3) due to the expansion of the cells (2.1) during their use to be measured; and at least one control unit (6) which is in communication with the measurement element (5) and enables a temperature corresponding to the resistance measured in accordance with predetermined parametric values to be determined by receiving the data of the resistance formed on the foam (3) from the measurement element (5).

[0022] The battery (2) included in the inventive system (1) is an energy storage unit that enables the storage of electrical energy and / or the use of stored electrical energy in order to enable the operation of any electrically powered vehicle and / or device in the form of an electric vehicle, electronic device, storage system and / or vessel. The battery (2) consists of at least one cell (2.1) that is used to enable the electrical energy to be stored and at least one body (not shown in the figures) that enables the cell (2.1) to be protected from external environment. Each cell (2.1) included in the battery (2) is connected to each other in series and / or in parallel in order to enable the electrical energy to be stored. In a preferred embodiment of the invention, the battery (2) is a lithium battery having a structure in the form of a pouch-type, cylindrical prismatic formed according to the intended use. The foam (3) included in the inventive system (1) is placed on and / or between the cells (2.1) included in the battery (2) and dampens the expansion of the cells (2.1) due to use. The foam (3) is produced by homogeneously mixing polymer granules and carbon nanotubes by using mechanical or ultrasonic mixing applications and compressing the homogeneous mixture with heat. The foam (3) has electrically conductive properties due to the carbon nanotubes homogeneously distributed during its production.

[0023] The insulating layer (4) included in the inventive system (1) coats each surface of the foam (3) in order to enable a thermal barrier between the foam (3) and the cell (2.1) to be realized. The insulating layer (4) is made of electrically insulating polymer material in the form of polyethylene terephthalate (PET), polyvinyl chloride (PVC) in order to realize electrical insulation between the foam (3) and the cell (2.1). In this way, electrical transmission between the electrically conductive foam (3) and the cell (2.1) is prevented.

[0024] The measurement element (5) included in the inventive system (1) establishes a physical connection with the foam (3) that is rendered conductive by means of carbon nanotubes, and enables the resistance generated on the foam (3) by the expansion of the cell (2.1) due to use to be measured. In the preferred embodiment of the invention, the measurement element (5) is an electrode that enables the resistance on the foam (3) to be measured. The measurement element (5) is in communication with the control unit (6) and is configured to transmit the data of the resistance generated on the foam (3) to the control unit (6) through the established communication.

[0025] The control unit (6) included in the inventive system (1) is in communication with the measurement element (5) and receives the data of the resistance generated on the foam (3) from the measurement element (5). The control unit (6) compares the received resistance data with the data set comprising the temperature information corresponding to certain predetermined resistance values. The control unit (6) enables the cell (2.1) temperature to be detected by determining the temperature information corresponding to the resistance generated on the foam (3) as a result of the comparison.

[0026] Industrial Application of the Invention

[0027] In the inventive system (1), the battery (2) enables the electrical energy in the form of an electric vehicle, energy storage system and / or vessel to be stored and / or used. There are at least two cells (2.1) connected to each other in parallel and / or in series included in the battery (2). There is a foam (3) which enables the expansion of the cell (2.1) to be absorbed and the temperature of the cell (2.1) during its use to be determined by being placed on the cell (2.1) included in the battery (2). The foam (3) is produced by homogeneously mixing polymer granules and carbon nanotubes with each other by using mechanical or ultrasonic mixing methods and compressing the homogeneous mixture with heat. The foam (3) has a conductive structure by means of the homogeneous carbon nanotubes thereof and allows the resistance it generates on the cell (2.1) to be measured by means of its conductive structure. There is an insulating layer (4) on the foam (3), the electrical insulation a between the foam (3) and the cell (2.1) is realized. The insulating layer (4) is located around the perimeter of the foam (3) in such a way that it covers each surface of the foam (3). The measurement element (5) is physically connected to the foam (3) and enables the resistance generated by the cell (2.1) on the foam (3) to be measured. The measurement element (5) transmits the measured data of the resistance on the foam (3) to the control unit (6). The control unit (6) determines the cell (2.1) temperature by comparing the resistance data it receives with the data set comprising the temperature data corresponding to a certain predetermined resistance.

[0028] Within these basic concepts; it is possible to develop various embodiments of the inventive “A System (1) Measuring Battery Cell Temperature”; the invention cannot be limited to examples disclosed herein and it is essentially according to claims.

Claims

CLAIMS1. A system (1) which enables the temperature measurement to be carried out; comprising at least one battery (2) which includes more than one cell (2.1) that enables the electrical energy to be stored and / or the stored energy to be used thereon; and characterized by at least one foam (3) which is positioned in such a way as to be on the cells (2.1) located on the battery (2) and enables the cell (2.1) to generate resistance over the expansion that occurs during its use; at least one insulating layer (4) which enables an electrical insulation to be realized between the foam (3) and the cell (2.1) by being located on each surface of the foam (3); at least one measurement element (5) which enables the resistance generated on the foam (3) due to the expansion of the cells (2.1) during their use to be measured; and at least one control unit (6) which is in communication with the measurement element (5) and enables a temperature corresponding to the resistance measured in accordance with predetermined parametric values to be determined by receiving the data of the resistance formed on the foam (3) from the measurement element (5).

2. A system (1) according to Claim 1; characterized by the battery (2) which is an energy storage unit that enables the storage of electrical energy and / or the use of stored electrical energy in order to enable the operation of any electrically powered vehicle and / or device in the form of an electric vehicle, electronic device, storage system and / or vessel.

3. A system (1) according to Claim 1 or 2; characterized by the battery (2) which comprises at least one cell (2.1) that is used to enable the electrical energy tobe stored and at least one body that enables the cell (2.1) to be protected from external environment.

4. A system (1) according to any one of the preceding claims; characterized by the battery (2) in which each cell (2.1) therein is connected to each other in series and / or in parallel in order to enable the electrical energy to be stored.

5. A system (1) according to any one of the preceding claims; characterized by the battery (2) which is a lithium battery having a structure in the form of a pouch-type, cylindrical prismatic formed according to the intended use.

6. A system (1) according to any one of the preceding claims; characterized by the foam (3) which is placed on and / or between the cells (2.1) included in the battery (2) and dampens the expansion of the cells (2.1) due to use.

7. A system (1) according to any one of the preceding claims; characterized by the foam (3) which is produced by homogeneously mixing polymer granules and carbon nanotubes by using mechanical or ultrasonic mixing applications and compressing the homogeneous mixture with heat.

8. A system (1) according to Claim 7; characterized by the foam (3) which has electrically conductive properties due to the carbon nanotubes homogeneously distributed during its production.

9. A system (1) according to any one of the preceding claims; characterized by the insulating layer (4) which coats each surface of the foam (3) in order to enable a thermal barrier between the foam (3) and the cell (2.1) to be realized.

10. A system (1) according to any one of the preceding claims; characterized by the insulating layer (4) which is made of electrically insulating polymer materialin the form of polyethylene terephthalate (PET), polyvinyl chloride (PVC) in order to realize electrical insulation between the foam (3) and the cell (2.1).

11. A system (1) according to any one of the preceding claims; characterized by the measurement element (5) which establishes a physical connection with the foam (3) that is rendered conductive by means of carbon nanotubes, and enables the resistance generated on the foam (3) by the expansion of the cell (2.1) due to use to be measured.

12. A system (1) according to any one of the preceding claims; characterized by the measurement element (5) which is an electrode that enables the resistance on the foam (3) to be measured.

13. A system (1) according to any one of the preceding claims; characterized by the measurement element (5) which is in communication with the control unit (6) and is configured to transmit the data of the resistance generated on the foam (3) to the control unit (6) through the established communication.

14. A system (1) according to any one of the preceding claims; characterized by the control unit (6) which is in communication with the measurement element (5) and receives the data of the resistance generated on the foam (3) from the measurement element (5).

15. A system (1) according to any one of the preceding claims; characterized by the control unit (6) which compares the received resistance data with the data set comprising the temperature information corresponding to certain predetermined resistance values.

16. A system (1) according to Claim 15; characterized by the control unit (6) which enables the cell (2.1) temperature to be detected by determining thetemperature information corresponding to the resistance generated on the foam (3) as a result of the comparison.

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