JP2500956B2 - Faulty battery detection method and disconnection method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of detecting a defective battery, which can detect a defective battery among a large number of cells stored in a large battery container and can separate the battery from other healthy batteries. And the separation method.

[0002]

2. Description of the Related Art A large-sized sodium-sulfur battery device for storing electric power has a large number of sodium-sulfur cells, numbering in the hundreds, stored in a battery container.
It is operated at a high temperature of ℃. As shown in FIG. 1, several unit cells 1 are connected in series to form a string 2.
Is formed, and the internal voltage can be measured by using the voltage measurement line 3 drawn out from the connection portion of each string 2.

However, if any one of a large number of unit cells 1 fails during operation, the voltage of the voltage measuring line 3 fluctuates, so that the fact of the failure can be easily grasped, but operation at high temperature. The failed battery could only be identified and repaired without stopping and cooling the battery device inside. For this reason, when the operation is continued at a high temperature, conventionally, there is a risk that a current will continue to flow from the other string 2 to the defective battery, causing a serious accident such as a fire.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and when a single battery in a battery device operating at a high temperature fails, it fails while the operation is continued. An object of the present invention is to provide a detection method and a disconnection method of a defective battery capable of detecting a string including a battery and disconnecting the string from other strings.

[0005]

[Means for Solving the Problems ]
The invention of claim 1 made for the purpose is to connect a plurality of unit cells in series or
/ And install the unit cells connected in parallel at high temperature
From the wall of the battery container to the tip and the terminal for voltage measurement
Inserts voltage measurement guide with built-in optical fiber
Voltage from the outside of the battery container while checking the position of the cell.
To detect a defective battery at high temperature by measuring
The outline is a method of detecting a defective battery characterized by
It Further, the invention of claim 2 connects a plurality of unit cells in series
Connect multiple strings with fuses at one end in parallel.
Batteries with a space above the unit cell assembly
Built in a container at high temperature,
, An optical fiber with an endoscope and a terminal for voltage measurement
Insert the voltage measurement guide with the built-in
By checking the position of the fuse and measuring the voltage
Specially designed to detect strings containing defective batteries at high temperatures.
The gist is a method of detecting a defective battery.

In addition, it was made in order to solve the above-mentioned topic
According to the invention of claim 3, a plurality of cells connected in series are provided.
The voltage across the fuse of the Tring is the
From the top wall of the battery container that holds the body under high temperature, to the tip
Built-in optical fiber with endoscope and voltage measurement terminal
Measurement by inserting a voltage measurement guide
Detects the faulty part and detects the string
Battery disconnection characterized by physically disconnecting the battery
The main point is the release method. The invention of claim 4
Is a string containing a defective battery according to the method of claim 2.
After confirming at high temperature, equip the tip with an endoscope and a cutter
A guide for cutting the unit cell with a built-in optical fiber
Inserted from the top wall of the
Check the fuse from the outside of the battery
Batteries characterized by mechanically cutting the battery under high temperature
The gist is the separation method of.

In addition, it was made in order to solve the above-mentioned topic
According to the invention of claim 5, according to the method of claim 1,
After confirming the installation at high temperature, attach the endoscope and cutter to the tip.
With a built-in optical fiber built-in optical fiber cutting guide
Insert it from the wall of the container, and
While checking the position, connect the defective battery to another healthy cell.
Because it is characterized by mechanically cutting the conducting wire under high temperature
The gist of the method is to disconnect the faulty battery. Again
The invention of claim 6 is to connect a plurality of cells in series or / and in parallel.
The wall of the battery container that houses the connected cell assembly at high temperature
First, insert the hollow guide into the battery container from the side.
After that, an optical fiber equipped with an endoscope and voltage measurement terminals
Check the position of the cell from the outside of the battery container by inserting the cable
The defective battery is detected at high temperature by measuring the voltage.
The summary is a method of detecting a defective battery, which is characterized by issuing
It is something.

Further, the invention of claim 7 directly connects a plurality of unit cells.
Multiple strings connected in rows with fuses at one end
The unit cells that are connected in parallel have a space above them.
Built in the battery container under high temperature,
First, insert the hollow guide into the battery container from the wall surface.
After that, an endoscope and a voltage measurement terminal were provided inside the tip.
Insert the optical fiber and position the fuse on each string.
By checking the voltage while checking, the
Faulty battery characterized by detecting the tring at high temperature
The detection method of is the gist. In addition, from claim 8
According to the method of claim 6, the light is located at the position of the defective battery under high temperature.
After confirmation, the hollow glass used in the method of claim 6.
Optical fiber with an endoscope and voltage measurement terminals
Pull out, then the optical fiber with an endoscope and a cutter at the tip.
Insert the cable to connect the defective cell to another healthy cell.
Of a faulty battery characterized by cutting the conducting wire under high temperature
The main point is the separation method. Further, in claim 9.
The invention provides a string containing a defective battery according to the method of claim 7.
After confirming the position of the group under high temperature, use the method of claim 7.
From the hollow guide used for
Pull out the provided optical fiber, then attach the endoscope and cutter to the tip.
Insert a fiber optic cable with
A fault voltage characterized by disconnecting the fuse of the string.
The purpose is to separate the pond. Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments.

In FIG. 2, 1 is the above-mentioned sodium-
It is a unit cell of a sulfur battery, and a string of a plurality of which are connected in series is connected to an interconnection 5 through a fuse 4. Reference numeral 6 denotes a battery container having a space in the upper part for accommodating a large number of the unit cells 1 under high temperature. A through hole is formed in the upper wall surface of the battery container, and as shown in FIGS. As shown, a receiving member 7 is attached to the inner wall surface facing the through hole. If it is discovered that a failure has occurred in the internal cell 1, the battery container 6
A trough-shaped support 8 having a lower surface coated with ceramic is inserted into the inside through a through hole in an upper wall surface, and the tip of the support 8 is fitted into the receiving tool 7.

Next, a hollow guide 9 made of a heat-resistant metal such as stainless steel is inserted into the battery container 6 along the trough-shaped support 8. As shown in FIGS. 2 and 5 to 8, the hollow guide 9 has a double wall surface,
The gap is used as the flow paths 10 and 11 to form a cooling mechanism in which a cooling fluid such as a cooling silicon oil is supplied by a pump 12 from the outside. The hollow guide 9 has a bent portion 13 in the middle as shown in FIGS. 6 and 7, and the tip of the wire 14 is fixed to the tip side. For this reason, one end of the wire 14 is pulled out from the through hole and the wire 14 is
By operating the, the tip portion of the hollow guide 9 can be bent at a right angle from the bent portion 13 as shown in FIGS. Further, as shown in FIGS. 8 to 10, a plurality of elongated holes 15 are formed on the lower surface of the hollow guide 9 depending on the pitch of the unit cell 1.

As shown in FIGS. 5 and 8, an optical fiber 16 having a resin coating on the periphery is inserted into the hollow guide 9. At the tip of this optical fiber 16 is a downward pointing endoscope.
17 is provided, and a voltage measuring terminal 18 is provided at a position close to this. The above light is applied to the hollow guide 9.
The one with the fiber 16 inserted is also called a voltage measurement guide.
And When the voltage measuring terminal 18 is brought into contact with the fuse 4 at the upper end of the string, the voltage of that portion can be read outside the battery container 6, and thus the defective battery can be detected.

As shown in FIG. 2, a balance weight 19 is attached to the tip of the bent portion 13 of the hollow guide 9. As a result, it is possible to prevent the tip end side from hanging down when the hollow guide 9 is bent. Further, as shown in FIG. 5, a scale 20 for measuring the insertion depth is attached to the base of the resin coating of the optical fiber 16, and the position where the endoscope 17 and the measurement terminal 18 at the tip end are set. You will be able to know if there is one. Similarly, the hollow guide 9 is also provided with a scale for checking the insertion distance.

[0013]

Next, the procedure for detecting and disconnecting a defective battery will be described. First, as described above, when it is found that a failure has occurred using the conventional voltage measurement line 3, the trough-shaped support 8 is inserted into the inside from the through hole of the upper wall surface of the battery container 6 toward the receiving member 7. , Its tip is fitted to the receiving tool 7. Next, the hollow guide 9 with a cooling mechanism is inserted and its tip is inserted to the failure occurrence position. The failure occurrence position can be roughly determined from the measurement result by the voltage measuring line 3, and the hollow guide 9 is bent in the middle by operating the wire 14 as necessary, and the tip reaches the failure occurrence position. I will let you.

Next, inside the hollow guide 9, the endoscope 17 is attached to the tip.
Insert the optical fiber 16 with the voltage measurement terminal 18 and
While confirming the position of the fuse 4 of the unit cell by the endoscope 17 of the voltage measurement guide, the voltage measurement terminal 18 is connected to the fuse 4
And contact it with a current to measure the voltage. Temperature inside as described above is a high temperature of 300 to 350 ° C., hollow Guy
The optical fiber 16
Is not damaged. Since no current flows in the string containing the defective battery, the voltage between the fuse 4 and the interconnection 5 becomes low as shown in FIG.
By utilizing this, the string including the defective battery can be reliably detected in the high temperature state.

After the string including the defective battery is determined in this manner, the optical fiber having the voltage measuring terminal 18 is provided.
16 is pulled out from the hollow guide 9, and an optical fiber 23 having an endoscope 21 and a cutter 22 is inserted at the tip as shown in FIG. The above optical fiber 23 was inserted into the hollow guide 9.
The one is called a cell cutting guide . The cutter 22 can also be opened and closed from the outside by a wire 24. The optical fiber 23 is inserted into the hollow guide 9 and the fuse 4 of the string including the defective battery is checked while the position is confirmed by the endoscope 21. Disconnect. As a result, the string including the defective battery is separated from other sound strings, and it is possible to prevent an accident due to the current flowing from the other string to the string including the defective battery.

In the above embodiment, the fuse 4 of the string containing the defective battery is blown, but the battery container 6 is the same as above.
While confirming the position of the defective battery from the outside, it is possible to mechanically cut the conducting wire connecting the defective battery and another sound cell at high temperature by the cutter 22.

[0017]

As described above, according to the method of the present invention, a string including a defective battery is detected without stopping the battery device operating at a high temperature, and the fuse of the string and the sound of the defective battery are detected. By disconnecting the lead that connects to the battery, the string containing the defective battery can be separated from other healthy strings. Therefore, according to the present invention, it is possible to prevent a serious accident due to a current flowing from another string to a string including a defective battery. Moreover, since the operation can be performed while confirming the position of the battery or the like with the endoscope, the above-mentioned work can be performed accurately and quickly.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an internal circuit of a battery device and its failure detection principle.

FIG. 2 is a perspective view showing an embodiment of the present invention.

[Fig. 3] Hollow guide toward the receiver inside the 0 battery container
Is a plan view showing a state of inserting the de.

FIG. 4 is a front view showing a state in which the hollow guide is inserted toward the receiving member inside the battery container.

FIG. 5 is a cross-sectional view showing a base portion of a hollow guide .

FIG. 6 is a horizontal sectional view showing a bent portion of a hollow guide .

FIG. 7 is a horizontal sectional view showing a state where the hollow guide is bent.

FIG. 8 is a cross-sectional view showing a tip portion of a voltage measurement guide .

FIG. 9 is a bottom view showing the tip of the voltage measurement guide .

FIG. 10 is a cross-sectional view of a long hole portion at the tip of the voltage measurement guide.

FIG. 11 is a cross-sectional view showing a tip portion of a unit cell cutting guide .

[Explanation of symbols]

 1 Single Battery 2 String 4 Fuse 6 Battery Container 9 Hollow Guide 13 Bend 14 Wire 16 Optical Fiber 17 Endoscope 18 Measuring Terminal 21 Endoscope 22 Cutter 23 Optical Fiber

Claims (9)

(57) [Claims] 1. An optical fiber provided with an endoscope and a voltage measuring terminal at a tip from a wall surface of a battery container in which a plurality of unit cells are connected in series and / or in parallel at a high temperature. A method for detecting a defective battery, characterized in that a defective battery is detected at a high temperature by inserting a built-in voltage measurement guide and measuring the voltage while confirming the position of the single battery from the outside of the battery container. 2. A unit cell assembly in which a plurality of unit cells are connected in series and a string in which a fuse is connected to one end is connected in parallel is placed in a battery container having an upper space at high temperature.
In built, from said upper wall of the battery container, a voltage with a built-in optical fiber having an endoscope and the voltage measuring terminals on the tip
A method for detecting a defective battery, which comprises detecting a string including a defective battery at a high temperature by inserting a measurement guide and measuring a voltage while confirming a position of a fuse of each string. 3. The voltage across the fuse of each string in which a plurality of unit cells are connected in series is adjusted from the wall surface at the top of the battery container in which the assembly of the unit cells is built in at high temperature to the tip.
A built-in optical fiber with an endoscope and voltage measurement terminals.
A method for disconnecting a defective battery, which is characterized by detecting a defective portion by inserting a pressure measurement guide, and physically cutting a fuse of a string including the defective cell. 4. After confirming the string including the defective battery at a high temperature by the method according to claim 2, a battery cell cutting guide having an optical fiber having an endoscope and a cutter at its tip is attached to the upper part of the battery container. The method for disconnecting a defective battery is characterized in that the fuse in the string containing the defective battery is mechanically cut at a high temperature while checking the fuse in the string containing the defective battery from the outside of the battery container. 5. The method according to claim 1, wherein the defective battery is kept under high temperature.
After the detection , the insertion guide for the single battery , which has an optical fiber with an endoscope and a cutter at the tip, is inserted from the wall of the battery container, and the position of the defective battery is confirmed from the outside of the battery container. A method for disconnecting a defective battery, which comprises mechanically disconnecting a conductive wire connecting the battery and another healthy single battery under high temperature. 6. A plurality of cells are connected in series and / or in parallel.
Wall of the battery container that houses the continuous unit cell assembly at high temperature
First, after inserting the hollow guide inside the battery container,
An optical fiber with an endoscope and a voltage measurement terminal inside
Insert and check the position of the cell from outside the battery container.
Faulty battery at high temperature by measuring the voltage
A method for detecting a defective battery, which is characterized in that 7. A plurality of unit cells are connected in series and one end is
A string consisting of multiple strings connected in parallel
Place the battery assembly in a battery container with a space at the top under high temperature.
Built-in, from the wall surface of the upper part of the battery case,
First insert the hollow guide into the inside, and then
Insert an optical fiber with an endoscope and voltage measurement terminal,
Measure the voltage while checking the position of the fuse in each string
The string containing the defective battery at high temperature.
A method for detecting a faulty battery, which is characterized by issuing. 8. The position of the defective battery is determined by the method of claim 6.
Used in the method of claim 6, after confirmation under high temperature
From the hollow guide to the optical fiber equipped with an endoscope and a terminal for voltage measurement.
Pull out the fiber and then attach the endoscope and cutter to the tip
Inserted fiber optics and failed cells and other healthy cells
Is characterized by cutting the conducting wire connecting the
How to disconnect the faulty battery. 9. A battery containing a defective battery according to the method of claim 7.
The method of claim 7, after confirming the position of the tring under high temperature.
From hollow guide used in endoscope and voltage measurement
Pull out the optical fiber with the terminal, then attach the endoscope to the tip.
Insert a fiber optic with a cutter
Characterized by cutting the fuse of the string containing
How to disconnect the defective battery.