CN110783587B - Device for improving thermal battery activation loop reliability and thermal battery system - Google Patents
Device for improving thermal battery activation loop reliability and thermal battery system Download PDFInfo
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- CN110783587B CN110783587B CN201911023865.9A CN201911023865A CN110783587B CN 110783587 B CN110783587 B CN 110783587B CN 201911023865 A CN201911023865 A CN 201911023865A CN 110783587 B CN110783587 B CN 110783587B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
- H01M6/5088—Initial activation; predischarge; Stabilisation of initial voltage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/30—Deferred-action cells
- H01M6/36—Deferred-action cells containing electrolyte and made operational by physical means, e.g. thermal cells
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Abstract
The invention discloses a device for improving the reliability of a thermal battery activation loop and a thermal battery system, wherein the device comprises: the current limiting resistor R1, the fixed pole I, the output positive pole column, the output negative pole column, the activation positive pole column and the activation negative pole column; the output positive pole column, the output negative pole column, the activated positive pole column, the activated negative pole column and the fixed pole column I are fixed on the battery cover in a glass insulator sintering mode and are insulated from the battery cover; one end of the activated positive pole and one end of the activated negative pole are positioned above the battery cover, and the other ends of the activated positive pole and the activated negative pole are positioned below the battery cover and sealed in the battery shell; the fixed pole I is arranged on the activation loop; one end of a current-limiting resistor R1 is fixed on the active positive pole column or the active negative pole column, and the other end of the current-limiting resistor R1 is fixed on the fixed pole column I; the activation signal forms a loop after passing through the current limiting resistor R1 and the thermal battery electric ignition head. The reliability of the thermal battery activation circuit is ensured by the invention.
Description
Technical Field
The invention belongs to the technical field of thermal batteries, and particularly relates to a device for improving the reliability of an activation loop of a thermal battery and a thermal battery system.
Background
The electrolyte of the thermal battery is solid at normal temperature, and when the thermal battery is used, the internal heating substance needs to be ignited through an activating device, and the electrolyte is melted so as to enter the working state. Two common activation methods are electrical and mechanical activation. In the electrical activation mode, the activation signal is generally only one way, and the electrical equipment usually needs a plurality of groups of thermal batteries to supply power simultaneously. Due to the difference of the resistance values of the lines, the multiple groups of thermal batteries are sequentially activated. The electric ignition head used for electrically activating the thermal battery is an initiating explosive device, and the bridge wires can be lapped to cause a short circuit phenomenon after ignition. The total current required by the activation of the thermal batteries is sent out by the control equipment and then is respectively sent to the electric ignition heads of the corresponding thermal batteries through the shunt of the multiple groups of thermal battery activation loops. If the short circuit phenomenon occurs in the activation loop of the thermal battery which is activated first, the activation current distributed to the thermal battery which is activated later is obviously reduced, and may be lower than the current required by normal ignition, so that the thermal battery cannot be activated normally. The thermal battery needs to be subjected to examination in mechanical environments such as vibration, impact, centrifugation and the like, so that components mounted on the thermal battery must be firmly fixed, and failure in the mechanical environments is prevented.
Under the condition that the applied activation signal is normal, the thermal battery has to ensure stable and reliable output current, so the reliable design of the activation loop is particularly important.
Disclosure of Invention
The technical problem of the invention is solved: the defects of the prior art are overcome, and the device for improving the reliability of the thermal battery activation loop and the thermal battery system are provided to ensure the reliability of the thermal battery activation loop.
In order to solve the technical problem, the invention discloses a device for improving the reliability of a thermal battery activation loop, which comprises: the current limiting circuit comprises a current limiting resistor R1, a fixed pole I for fixing the current limiting resistor R1, an output positive pole column and an output negative pole column for outputting a loop, and an activation positive pole column and an activation negative pole column for activating the loop;
the output positive pole column, the output negative pole column, the activated positive pole column, the activated negative pole column and the fixed pole column I are fixed on the battery cover in a glass insulator sintering mode and are insulated from the battery cover;
one end of the activation positive pole and the activation negative pole is positioned above the battery cover and is used for being connected with a cable for inputting an activation signal from the outside, and the other end of the activation positive pole and the activation negative pole is positioned below the battery cover and is sealed in the battery shell and is used for being connected with an electric ignition head of the thermal battery;
the fixed pole I is arranged on the activation loop; one end of a current-limiting resistor R1 is fixed on the active positive pole column or the active negative pole column, and the other end of the current-limiting resistor R1 is fixed on the fixed pole column I; the activation signal forms a loop after passing through the current limiting resistor R1 and the thermal battery electric ignition head.
Correspondingly, the invention also discloses a thermal battery system, which comprises: thermal battery B, thermal battery C1, thermal battery C2, and thermal battery C3; adding a fixed pole and a current limiting resistor to each unit cell activation loop under the thermal battery B, the thermal battery C1, the thermal battery C2 and the thermal battery C3; the thermal battery B, the thermal battery C1, the thermal battery C2 and the thermal battery C3 adopt an electric activation mode, and a sensitive electric ignition head is selected; each unit cell under the thermal battery B, the thermal battery C1, the thermal battery C2 and the thermal battery C3 adopts a double-bridge parallel connection structure; the thermal battery C1, the thermal battery C2 and the thermal battery C3 are connected in parallel and then connected with a fixed resistor A1, and the thermal battery B is connected with a fixed resistor A2.
The invention has the following advantages:
the invention discloses a device for improving the reliability of a thermal battery activation loop, which can ensure that a plurality of groups of thermal batteries adopting the same circuit of activation signals are firstly activated in one or more thermal batteries by adding a pole column and a current-limiting resistor in the thermal battery activation loop and selecting a proper current-limiting resistor value, and the current distributed by each thermal battery activation branch line is still more balanced under the condition that the electric ignition head of the firstly activated thermal battery is continuously short-circuited, and the minimum current distributed in the activated thermal battery activation branch lines can still meet the normal ignition of the electric ignition head. The current-limiting resistor is fixed between the two polar columns, and cannot shift under a mechanical environment, and faults such as pin tearing and the like occur.
Drawings
FIG. 1 is a schematic diagram of an activation circuit in an embodiment of the present invention;
FIG. 2 is a wiring diagram of an activation loop in an embodiment of the present invention;
FIG. 3 is a schematic diagram of yet another activation circuit in an embodiment of the present invention;
FIG. 4 is a wiring diagram of yet another activation circuit in an embodiment of the present invention;
FIG. 5 is a schematic diagram of an activation circuit for simultaneously activating multiple groups of thermal batteries according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1-2, in the present embodiment, the apparatus for improving the reliability of the thermal battery activation circuit includes: the current limiting resistor R1, the fixed pole post I1 for fixing the current limiting resistor R1, the output positive pole post 3 and the output negative pole post 5 for outputting a loop, and the activation positive pole post 2 and the activation negative pole post 4 for activating the loop. The output positive pole column 3, the output negative pole column 5, the activation positive pole column 2, the activation negative pole column 4 and the fixed pole column I1 are fixed on a battery cover in a glass insulator sintering mode and are insulated from the battery cover; one end of the activation positive pole column 2 and one end of the activation negative pole column 4 are positioned above the battery cover and are used for being connected with a cable for inputting an activation signal from the outside, and the other end of the activation positive pole column and the other end of the activation negative pole column are positioned below the battery cover and are sealed in the battery shell and are used for being connected with an electric ignition head of the thermal battery; the fixed pole I1 is arranged on the activation loop; one end of a current-limiting resistor R1 is fixed on the activated positive pole post 2 or the activated negative pole post 4, and the other end of the current-limiting resistor R1 is fixed on the fixed pole post I1; the activation signal forms a loop after passing through the current limiting resistor R1 and the thermal battery electric ignition head.
In a preferred embodiment of the present invention, since the thermal battery electrical firing head generally employs a dual redundant structure, the two electrical firing heads can also be separated to form two activation circuits. Like fig. 3 ~ 4, when thermal battery electric ignition head is the redundant structure of double-circuit, this improve device of thermal battery activation return circuit reliability still includes: a current-limiting resistor R2 and a fixed pole II 6 for fixing the current-limiting resistor R2. The fixed pole II 6 is arranged on the activation loop, is fixed on the battery cover in a glass insulator sintering mode and is insulated from the battery cover; one end of the current-limiting resistor R2 is fixed on the activated positive pole post 2 or the activated negative pole post 4, and the other end is fixed on the fixed pole post II 6; the activation signal forms a loop after passing through the current limiting resistor R2 and the thermal battery electric ignition head.
Preferably, the current limiting resistor R1 and the current limiting resistor R2 are both initiating explosive device current limiting resistors, and the power is 1W or 2W. The fixed pole I1 and the fixed pole II 6 are made of conductive materials, and the materials are stainless steel or copper.
Example 2
On the basis of the above embodiment, the invention also discloses a thermal battery system, in which the device for improving the reliability of the thermal battery activation circuit described in the above embodiment is arranged. As shown in fig. 5, the thermal battery system includes: thermal battery B, thermal battery C1, thermal battery C2, and thermal battery C3; the thermal battery C1, the thermal battery C2 and the thermal battery C3 are connected in parallel and then connected with a fixed resistor A1, and the thermal battery B is connected with a fixed resistor A2. The thermal battery B, the thermal battery C1, the thermal battery C2 and the thermal battery C3 are powered simultaneously, and the activation signals are the same. A fixed pole post and a current limiting resistor are added to each unit cell activation loop of each thermal battery pack. Each thermal battery set adopts an electric activation mode, and a sensitive electric ignition head is selected. Each unit cell of each thermal battery set adopts a double-bridge parallel connection structure.
Preferably, the cell activation circuit is additionally provided with a fixed pole and a current limiting resistor, and comprises: a fixed pole post is arranged between an activation positive pole post 2 and an activation negative pole post 4 of the unit cell activation loop; one end of the current-limiting resistor is fixed on the active positive pole post 2 or the active negative pole post 4, and the other end of the current-limiting resistor is fixed on the fixed pole post; the activation signal forms a loop after passing through the current-limiting resistor and the thermal battery electric ignition head.
Preferably, the reliable activation current of the sensitive electric igniter is 0.7A, the resistance value of a single sensitive electric igniter is 0.9-1.6 omega, the resistance value of the current limiting resistor is 4 omega, and the resistance values of the fixed resistor A1 and the fixed resistor A2 are 0.5-0.8 omega including a resistor. The current required for activation of battery B is not less than 1.4A, and the current required for activation of battery C1, battery C2, and battery C3 is not less than 4.2A. The activation power is 25V. Wherein, each line resistance in FIG. 5 is a resistance value at 20 ℃; according to the environmental temperature when the thermal battery B, the thermal battery C1, the thermal battery C2 and the thermal battery C3 are activated, the temperature coefficient Kt value of the cable lead is 0.745-40-1.15 +60 ℃; the resistance value of the current-limiting resistor is 4 omega, and the precision is +/-5%.
The activation currents of thermal battery B, thermal battery C1, thermal battery C2 and thermal battery C3 were rechecked and the results showed that: even if various short circuit conditions occur in the activation process of the thermal batteries, the current required by effective activation of all the thermal batteries can be ensured under the condition that the activation power supply is 25V. The calculation results are shown in Table 1.
TABLE 1 multiple groups of thermal batteries activate current distribution table under different states
Relevant experimental verification was carried out for the above measures, wherein the thermal battery B, the thermal battery C1, the thermal battery C2 and the thermal battery C3 all employ true electric ignition heads. In the test, a 28.5V2 voltage of 25V was applied and the firing of the thermal battery B, thermal battery C1, thermal battery C2 and thermal battery C3 electric igniter was monitored. The ignition verification test is carried out twice in total, namely a normal ignition state and a short circuit state after the thermal battery pack B is ignited.
The test result shows that: all thermal batteries are normally activated in two tests, and even if the short circuit condition occurs after the electric ignition head of the thermal battery pack B is ignited, the current required by effective activation of all thermal batteries on the bomb can be ensured under the condition that the power voltage of 28.5V2 is 25V.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (2)
1. A thermal battery system provided with means for improving the reliability of a thermal battery activation circuit, comprising: thermal battery B, thermal battery C1, thermal battery C2, and thermal battery C3;
the structures of all the thermal batteries are the same; the device comprises a current-limiting resistor R1, a fixed pole I (1), an activation positive pole column (2), an output positive pole column (3), an activation negative pole column (4), an output negative pole column (5) and a group of thermal battery electric ignition heads, wherein the current-limiting resistor R1, the fixed pole column I (1), the activation positive pole column (2), the output positive pole column (3), the activation negative pole column (4), the output negative pole column (5) and the group of thermal battery electric ignition heads form a thermal battery pack; at the moment, the output positive pole column (3), the output negative pole column (5), the activation positive pole column (2), the activation negative pole column (4) and the fixed pole column I (1) are fixed on a battery cover in a glass insulator sintering mode and are insulated from the battery cover; one end of the activation positive pole column (2) and one end of the activation negative pole column (4) are positioned above the battery cover and are used for being connected with a cable for inputting an activation signal from the outside, and the other end of the activation positive pole column and the other end of the activation negative pole column are positioned below the battery cover and are sealed in the battery shell and are used for being connected with an electric ignition head of the thermal battery; the fixed pole I (1) is arranged on the activation loop; one end of a current limiting resistor R1 is fixed on the active positive pole post (2) or the active negative pole post (4), and the other end is fixed on the fixed pole post I (1); the activation signal forms a loop after passing through a current limiting resistor R1 and a thermal battery electric ignition head; or, a current-limiting resistor R1, a fixed pole I (1), an activation positive pole column (2), an output positive pole column (3), an activation negative pole column (4), an output negative pole column (5), a current-limiting resistor R2, a fixed pole II (6) and a group of thermal battery electric ignition heads form a thermal battery pack; at the moment, the output positive pole column (3), the output negative pole column (5), the activation positive pole column (2), the activation negative pole column (4) and the fixed pole column I (1) are fixed on a battery cover in a glass insulator sintering mode and are insulated from the battery cover; one end of the activation positive pole column (2) and one end of the activation negative pole column (4) are positioned above the battery cover and are used for being connected with a cable for inputting an activation signal from the outside, and the other end of the activation positive pole column and the other end of the activation negative pole column are positioned below the battery cover and are sealed in the battery shell and are used for being connected with an electric ignition head of the thermal battery; the fixed pole I (1) is arranged on the activation loop; one end of a current limiting resistor R1 is fixed on the active positive pole post (2) or the active negative pole post (4), and the other end is fixed on the fixed pole post I (1); the activation signal forms a loop after passing through a current limiting resistor R1 and a thermal battery electric ignition head; the fixed pole II (6) is arranged on the activation loop, is fixed on the battery cover in a glass insulator sintering mode and is insulated from the battery cover; one end of a current limiting resistor R2 is fixed on the active positive pole post (2) or the active negative pole post (4), and the other end is fixed on the fixed pole post II (6); the activation signal forms a loop after passing through a current limiting resistor R2 and a thermal battery electric ignition head; the current limiting resistor R1 and the current limiting resistor R2 are both initiating explosive device current limiting resistors, and the power is 1W or 2W;
one end of the thermal battery C1, the thermal battery C2 and the thermal battery C3 are connected in parallel and then connected with the negative electrode of the activation power supply, and the other end is connected with one end of the fixed resistor A1; the other end of the fixed resistor A1 is connected with one end of a fixed resistor A2 and one end of a thermal battery B; the other end of the fixed resistor A2 is connected with the anode of the activation power supply; the other end of the thermal battery B is connected with the negative electrode of the activation power supply; the thermal battery B, the thermal battery C1, the thermal battery C2 and the thermal battery C3 are powered simultaneously, and the activation signals are the same path;
each thermal battery pack adopts an electric activation mode, and a sensitive electric ignition head is selected; each unit cell of each thermal battery pack adopts a double-bridge parallel structure; the reliable activation current of the sensitive electric ignition head is 0.7A, and the resistance value of a single sensitive electric ignition head is 0.9-1.6 omega; the resistance value of the current limiting resistor is as follows: 4 omega; the fixed resistor A1 and the fixed resistor A2 have the following resistance values: 0.5-0.8 omega; the current required for activation of thermal battery B is not less than 1.4A, and the current required for activation of thermal battery C1, thermal battery C2, and thermal battery C3 is not less than 4.2A; the activation power is 25V.
2. The thermal battery system provided with the device for improving the reliability of the thermal battery activation circuit as claimed in claim 1, wherein the fixed pole I (1) and the fixed pole II (6) are both made of conductive materials, and the materials are stainless steel or copper.
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