JP2020061317A - Abnormality notification device of battery - Google Patents

Abstract

To provide an abnormality notification device of a battery, capable of immediately notifying an abnormality when generating a heat due to the abnormality in a battery.SOLUTION: An abnormality notification device of a battery, comprises: a thermoelectric element which is connected to a battery so that heat can be conducted, and can convert a heat to an electric power using the battery as a heat source; and a notification circuit which is connected to the thermoelectric element, and notifies an abnormal generation when an electric potential difference using the battery of the thermoelectric element as a heat source becomes a predetermined electric potential difference at an abnormality of the battery.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a battery abnormality notification device.

  Patent Document 1 discloses a battery pack abnormality detection device. Such a battery pack abnormality detection device is provided with a battery composed of one secondary battery cell or a plurality of cell modules connected in series or series-parallel, and in thermal contact with the battery pack. When the assembled battery is not in operation, that is, when charging and discharging are not performed, the thermoelectric element is operated by the electromotive force of the thermoelectric element generated by the heat generated when the assembled battery is abnormal, and the assembled battery A temperature monitor circuit for measuring the temperature and a storage unit for storing the abnormal temperature measured by the temperature monitor circuit are provided.

  Further, Patent Document 1 discloses a determination unit that reads out the stored contents of the storage unit when the assembled battery is operating, that is, at the time of charging or discharging, and notifies the occurrence of an abnormality when an abnormal temperature rise is recorded. It is disclosed that it is provided.

JP-A-8-83630

  In the battery pack abnormality detection device disclosed in Patent Document 1, when the battery pack is operating, that is, at the time of charging or discharging, the stored contents of the storage means are read out and the occurrence of an abnormality is notified when a temperature abnormality is recorded. Therefore, even if the battery heats up due to an abnormality, the abnormality cannot be immediately notified.

  In view of the above-mentioned circumstances, at least one embodiment of the present invention has an object to provide a battery abnormality notification device capable of immediately reporting an abnormality when heat is generated due to a battery abnormality.

  (1) A battery abnormality notification device according to at least one embodiment of the present invention includes a thermoelectric conversion element which is connected to a battery so as to be able to conduct heat, and which can convert heat into electric power using the battery as a heat source, and the thermoelectric conversion element. A notification circuit that is connected and notifies the occurrence of an abnormality when the potential difference of the thermoelectric conversion element using the battery as a heat source becomes a predetermined potential difference when the battery is abnormal.

  According to the above configuration (1), when the battery heats up due to the abnormality of the battery, the potential difference between the thermoelectric conversion element and the battery as a heat source increases. Therefore, the abnormality of the battery can be recognized by the potential difference of the thermoelectric conversion element using the battery as a heat source. Therefore, if the notification circuit notifies the occurrence of an abnormality when the potential difference between the thermoelectric conversion element and the battery as the heat source becomes a predetermined potential difference during the abnormality of the battery, the abnormality of the battery can be immediately notified.

  (2) In some embodiments, in the configuration of the above (1), the thermoelectric conversion element has a non-heat source side connected to a case accommodating the battery in a heat conductive manner.

  With configuration (2) above, when the battery heats up due to an abnormality in the battery, the relative temperature difference between the battery and the case increases, and the potential difference between the thermoelectric conversion element and the battery as a heat source also increases. Therefore, the relative temperature difference between the battery and the case can be found from the potential difference between the thermoelectric conversion element and the battery as the heat source, and the battery abnormality can be found. Therefore, when the heat source side of the thermoelectric conversion element is thermally conductively connected to the battery and the non-heat source side is thermally conductively connected to the case accommodating the battery, an abnormality of the battery can be recognized by the relative temperature difference between the battery and the case. In this case, as the predetermined potential difference of the battery when the abnormality is compared by the notification circuit, a predetermined relative temperature difference when the battery is abnormal is converted into a potential difference.

  (3) In some embodiments, in the configuration of (1), when the battery is an assembled battery composed of two or more batteries, the thermoelectric conversion element conducts heat to a battery having one heat source side. A non-heat source side is connected to another battery adjacent to the one battery so as to be able to conduct heat.

  With configuration (3) above, when one battery heats up due to an abnormality in the one battery, the relative temperature difference between the one battery and the other battery adjacent to the one battery increases, and the thermoelectric conversion element The potential difference with one battery as a heat source becomes large. Therefore, the difference in relative temperature between one battery and the other battery adjacent to the one battery can be found from the potential difference between the one battery of the thermoelectric conversion element as a heat source, and the battery abnormality can be found. Therefore, when the heat source side is connected to one battery so that heat can be conducted and the non-heat source side is connected to another battery adjacent to the one battery, the one battery and the other battery adjacent to the one battery are connected. One battery's abnormality can be seen from the relative temperature difference. In this case, as the predetermined potential difference of the battery to be compared by the notification circuit, the one obtained by converting the relative temperature difference between the predetermined one battery and another battery adjacent to the one battery into the potential difference is used.

  (4) In some embodiments, in the configuration according to any one of (1) to (3), the notification circuit includes a detection unit capable of detecting a potential difference between the thermoelectric conversion element and the battery serving as a heat source. , A comparison unit capable of comparing a potential difference of the thermoelectric conversion element detected by the detection unit with the battery as a heat source and a predetermined potential difference during abnormal operation of the battery, and the comparison unit of the thermoelectric conversion element in the comparison unit. And a notification unit that notifies the occurrence of the abnormality when the potential difference using the battery as a heat source is equal to or greater than the predetermined potential difference when the battery is abnormal.

  According to the configuration of the above (4), the detection unit detects the potential difference between the thermoelectric conversion element battery and the battery as the heat source, and the comparison unit determines the potential difference between the thermoelectric conversion element battery and the heat source that is detected by the detection unit. Compare with the potential difference when the battery is abnormal. Then, when the potential difference of the thermoelectric conversion element using the battery as the heat source in the comparison unit becomes equal to or greater than the predetermined potential difference of the battery at the time of abnormality, the notification unit notifies the abnormality occurrence. Therefore, when heat is generated due to an abnormality in the battery, the occurrence of abnormality can be immediately notified.

  (5) In some embodiments, in the configuration of (4), the notification circuit further includes a battery that corresponds to a potential difference between the thermoelectric conversion element detected by the detection unit and the battery serving as a heat source. Corresponding to a calculation unit capable of calculating temperature, a potential difference of the thermoelectric conversion element detected by the detection unit using the battery as a heat source, and a potential difference of the thermoelectric conversion element calculated by the calculation unit using the battery as a heat source. And a storage unit capable of storing the battery temperature and the identification information of the battery.

  According to the above configuration (5), the calculation unit calculates the temperature of the battery corresponding to the potential difference with the battery of the thermoelectric conversion element detected by the detection unit as a heat source, and the storage unit detects the thermoelectric conversion detected by the detection unit. The potential difference of the element battery as a heat source, the temperature of the battery corresponding to the potential difference calculated by the calculation unit of the thermoelectric conversion element battery as a heat source, and the battery identification information are stored.

  (6) In some embodiments, in the configuration of (5), the notification circuit further includes a communication unit capable of receiving the radio wave transmitted from the base station, and the communication unit transmits from the base station. When receiving the radio wave is performed, the potential difference of the thermoelectric conversion element stored in the storage unit as the heat source of the battery, the temperature of the battery corresponding to the potential difference of the battery calculated as the heat source of the heat source, And transmitting identification information of the battery to the base station.

  According to the configuration of (6), when the communication unit receives the radio wave transmitted from the base station, the potential difference between the thermoelectric conversion element battery stored in the storage unit as a heat source and the battery calculated by the calculation unit. The temperature of the battery and the identification information of the battery corresponding to the potential difference with the heat source as the heat source are transmitted to the base station. Therefore, the base station can acquire the potential difference between the thermoelectric conversion element and the battery as the heat source, the temperature of the battery corresponding to the potential difference between the cells and the heat source calculated by the calculation unit, and the battery identification information.

  According to at least one embodiment of the present invention, it is possible to immediately notify when heat is generated due to an abnormality of the battery.

It is a figure which shows roughly the structure of the abnormality notification device of the battery which concerns on one Embodiment of this invention. It is a figure which shows roughly the structure of the abnormality notification device of the battery which concerns on one Embodiment of this invention. It is a figure which shows roughly the structure of the abnormality notification device of the battery which concerns on one Embodiment of this invention. It is a figure which shows schematically the alerting | reporting circuit which concerns on one Embodiment of this invention. It is a figure which shows schematically the alerting | reporting circuit which concerns on one Embodiment of this invention. It is a figure which shows schematically the alerting | reporting circuit which concerns on one Embodiment of this invention. 5 is a flowchart schematically showing the control contents of the battery abnormality notification device according to an embodiment of the present invention including the notification circuit shown in FIG. 4. 4 is a flowchart schematically showing the control contents of the battery abnormality notification device shown in FIG. 3 according to the embodiment of the present invention. 7 is a flowchart schematically showing the control contents of the battery abnormality notification device according to an embodiment of the present invention including the notification circuit shown in FIG. 6.

  Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described as the embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Absent. For example, expressions that represent relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric”, or “coaxial” are strict. In addition to representing such an arrangement, it also represents a state in which the components are relatively displaced by a tolerance or an angle or a distance at which the same function can be obtained. Further, for example, the expression representing a shape such as a quadrangle or a cylindrical shape does not only represent a shape such as a quadrangle or a cylindrical shape in a geometrically strict sense, but also an uneven portion or A shape including a chamfered portion and the like is also shown. On the other hand, the expressions “comprising”, “comprising”, “comprising”, “including”, or “having” one element are not exclusive expressions excluding the existence of other elements.

  FIG. 1 is a diagram schematically showing a configuration of a battery abnormality notification device 1A according to an embodiment of the present invention. As shown in FIG. 1, a battery abnormality notification device 1A according to an embodiment of the present invention includes a thermoelectric conversion element 2 and a notification circuit 3.

  The thermoelectric conversion element 2 is connected to the battery 10 so as to be able to conduct heat, and can convert heat into a potential difference using the battery 10 as a heat source. The thermoelectric conversion element 2 uses, for example, the Seebeck effect in which an electromotive force is generated when two types of different metals or semiconductors are joined and a temperature difference is generated at both ends. In the thermoelectric conversion element 2, for example, in order to obtain a large potential difference, the p-type semiconductor 21 and the n-type semiconductor 22 are used in combination. In the example shown in FIG. 1, the heat source side 2A of the thermoelectric conversion element 2 is thermally conductively connected to the battery 10 and the non-heat source side is opened, so that the non-heat source side 2B of the thermoelectric conversion element 2 is air-cooled.

  The notification circuit 3 is connected to the thermoelectric conversion element 2 and notifies the occurrence of an abnormality when the potential difference of the thermoelectric conversion element 2 using the battery 10 as a heat source becomes a predetermined potential difference during battery abnormality. The predetermined potential difference during battery abnormality is, for example, the potential difference during battery abnormality determined by experiments or the like.

  According to the battery abnormality notification device 1A according to the embodiment of the present invention described above, when the battery 10 generates heat due to the abnormality of the battery 10, the potential difference between the thermoelectric conversion element 2 and the battery 10 as a heat source increases. Therefore, the abnormality of the battery 10 can be recognized by the potential difference of the thermoelectric conversion element 2 using the battery 10 as a heat source. Therefore, if the notification circuit 3 reports the occurrence of an abnormality when the potential difference of the thermoelectric conversion element 2 using the battery 10 as a heat source becomes a predetermined potential difference during the abnormality of the battery, the abnormality of the battery 10 can be immediately reported.

  FIG. 2 is a diagram schematically showing the configuration of the battery abnormality notification device 1B according to the embodiment of the present invention. As shown in FIG. 2, in the battery abnormality notification device 1B according to one embodiment of the present invention, the heat source side 2A of the thermoelectric conversion element 2 is connected to the battery 10 so as to be able to conduct heat, and the non-heat source side 2B connects the battery 10 to the battery 10. It is connected to the case 20 to be housed so as to be able to conduct heat. The case 20 has a large heat capacity by itself, but in an electric vehicle, it may be attached to a cross member or a side member to secure a large heat capacity.

  According to the battery abnormality notification device 1B according to the embodiment of the present invention described above, when the battery 10 generates heat due to the abnormality of the battery 10, the relative temperature difference between the battery 10 and the case 20 becomes large, and the battery of the thermoelectric conversion element 2 is increased. The potential difference with 10 as the heat source becomes large. Therefore, the relative temperature difference between the battery 10 and the case 20 can be known by the potential difference of the thermoelectric conversion element 2 using the battery 10 as a heat source, and the abnormality of the battery 10 can be known. Therefore, when the heat source side 2A of the thermoelectric conversion element 2 is thermally conductively connected to the battery 10 and the non-heat source side 2B is thermally conductively connected to the case 20 housing the battery 10, the battery 10 and the case 20 are relatively opposed to each other. An abnormality of the battery 10 can be recognized by the temperature difference. In this case, as the predetermined potential difference when the battery is abnormal, which is compared by the notification circuit 3, the predetermined relative temperature difference when the battery is abnormal is converted into a potential difference.

  FIG. 3 is a diagram schematically showing the configuration of the battery abnormality notification device 1C according to the embodiment of the present invention. As shown in FIG. 3, in the battery abnormality notification device 1C according to the embodiment of the present invention, when the battery 10 is an assembled battery of two or more, the thermoelectric conversion element 2 has a heat source side 2A which is heated by the battery 10A. The non-heat source side 2B is conductively connected, and the non-heat source side 2B is thermally conductively connected to the battery 10B adjacent to the battery 10A.

  According to the above-described battery abnormality notification device 1C of the embodiment of the present invention, when the battery 10A generates heat due to the abnormality of the battery 10A, the relative temperature difference between the battery 10A and the battery 10B adjacent to the battery 10A becomes large, and the thermoelectricity is increased. The potential difference with one battery of the conversion element 2 as a heat source becomes large. Therefore, the relative temperature difference between the battery 10A and the battery 10B adjacent to the battery 10A can be known by the potential difference between the thermoelectric conversion element 2 and the battery 10A as a heat source, and the abnormality of the battery 10A can be known. Therefore, when the heat source side 2A is connected to the battery 10A so that heat can be conducted and the non-heat source side 2B is connected to the battery 10B adjacent to the battery 10A, the battery 10A and the battery 10B adjacent to the battery 10A are affected by a relative temperature difference. You can see the abnormality of 10A. In this case, the predetermined potential difference of the battery 10A in the abnormal state, which the notification circuit 3 compares, is obtained by converting the predetermined relative temperature difference of the battery 10A in the abnormal state into a potential difference.

  4 to 6 are diagrams schematically showing the notification circuit 3 (3A, 3B, 3C) according to the embodiment of the present invention. As shown in FIG. 4, the notification circuit 3A according to the embodiment of the present invention includes a detection unit 31, a comparison unit 32, and a notification unit 33.

  The detection unit 31 can detect a potential difference between the thermoelectric conversion element 2 and the battery 10 as a heat source.

  The comparison unit 32 can compare the potential difference detected by the detection unit 31 with the battery 10 of the thermoelectric conversion element 2 as a heat source with a predetermined potential difference when the battery is abnormal. The predetermined potential difference when the battery is abnormal is, for example, a value obtained in advance by experiments or the like.

  The notification unit 33 notifies the abnormality occurrence when the potential difference of the thermoelectric conversion element 2 using the battery 10 (10A) as a heat source in the comparison unit 32 is equal to or more than a predetermined potential difference at the time of abnormality of the battery.

  According to the notification circuit 3A according to the embodiment of the present invention described above, the detection unit 31 detects the potential difference with the battery 10 (10A) of the thermoelectric conversion element 2 as the heat source, and the comparison unit 32 is detected by the detection unit 31. The potential difference between the thermoelectric conversion element 2 and the battery 10 (10A) as a heat source is compared with a predetermined potential difference when the battery is abnormal. Then, in the comparison unit 32, when the potential difference between the thermoelectric conversion element 2 and the battery 10 (10A) as a heat source becomes a predetermined potential difference during battery abnormality, the notification unit 33 notifies the abnormality occurrence. Therefore, when heat is generated due to the abnormality of the battery 10 (10A), the abnormality occurrence can be immediately notified.

  As shown in FIG. 5, the notification circuit 3B according to the embodiment of the present invention further includes a calculation unit 34 and a storage unit 35.

  The calculation unit 34 can calculate the temperature of the battery 10 (10A) corresponding to the potential difference between the battery 10 (10A) of the thermoelectric conversion element 2 detected by the detection unit 31 as a heat source.

  The storage unit 35 includes a potential difference between the battery 10 (10A) of the thermoelectric conversion element 2 detected by the detection unit 31 as a heat source, and a potential difference between the battery 10 (10A) of the thermoelectric conversion element 2 calculated by the calculation unit 34 as a heat source. It is possible to store the temperature of the battery 10 (10A) corresponding to, and the identification information of the battery 10 (10A).

  According to the notification circuit 3 according to the embodiment of the present invention described above, the battery 10 (10A corresponding to the potential difference in which the battery 10 (10A) of the thermoelectric conversion element 2 detected by the detector 31 is used as the heat source by the calculator 34. ) Of the thermoelectric conversion element 2 calculated by the storage unit 35 and the battery 10 (10A) of the thermoelectric conversion element 2 calculated by the calculation unit 34 as the heat source of the battery 10 (10A) of the thermoelectric conversion element 2 detected by the detection unit 31. ) Is used as the heat source, and the temperature of the battery 10 corresponding to the potential difference and the identification information of the battery 10 are stored.

  As shown in FIG. 6, the notification circuit 3C according to the embodiment of the present invention further includes a communication unit 36.

  The communication unit 36 can receive the radio wave transmitted from the base station. Further, when the communication unit 36 receives the radio wave transmitted from the base station 100, the communication unit 36 calculates the potential difference, which is stored in the storage unit 35 and uses the battery 10 of the thermoelectric conversion element 2 as a heat source, by the calculation unit 34. The temperature of the battery 10 (10A) corresponding to the potential difference using the battery 10 (10A) as a heat source and the identification information of the battery 10 (10A) are transmitted to the base station 100. For example, the communication unit 36 includes an IC tag, activates the notification circuit 3C by receiving the radio wave transmitted from the base station 100, and heats the battery 10 of the thermoelectric conversion element 2 stored in the storage unit 35 as a heat source. And the temperature of the battery 10 (10A) corresponding to the potential difference calculated by the calculation unit 34 as the heat source of the battery 10 and the identification information of the battery 10 (10A) are transmitted to the base station 100.

  According to the notification circuit 3C according to the embodiment of the present invention described above, when the communication unit 36 receives the radio wave transmitted from the base station 100, the battery 10 of the thermoelectric conversion element 2 stored in the storage unit 35 ( 10A) as the heat source, the temperature of the battery 10 (10A) corresponding to the potential difference calculated by the calculation unit 34 as the battery 10 (10A) as the heat source, and the identification information of the battery 10 (10A) to the base station 100. Send. Therefore, in the base station 100, the temperature of the battery 10 (10A) corresponding to the potential difference of the thermoelectric conversion element 2 using the battery 10 (10A) as the heat source and the potential difference of the battery 10 (10A) calculated by the calculation unit 34 as the heat source. , And the identification information of the battery 10 (10A) can be acquired.

  FIG. 7 is a flowchart schematically showing the control contents of the battery abnormality notification device 1A including the notification circuit 3A shown in FIG. 4 according to the embodiment of the present invention. As shown in FIG. 7, in the battery abnormality notification device 1A according to the embodiment of the present invention including the notification circuit 3A shown in FIG. 4, the detection unit 31 detects the potential difference between the thermoelectric conversion element 2 and the battery 10 as a heat source. It is detected (step S11). Next, the comparison unit 32 compares the potential difference between the thermoelectric conversion element 2 detected by the detection unit 31 with the battery 10 as a heat source with a predetermined potential difference during abnormal operation of the battery (step S12). The predetermined potential difference when the battery is in an abnormal state is, for example, a value previously obtained by an experiment or the like as described above. For example, it is a potential difference when the temperature of the battery 10 is higher than room temperature by 30 ° C. or more.

  Then, when the potential difference of the thermoelectric conversion element 2 using the battery 10 as a heat source in the comparison unit 32 becomes equal to or greater than a predetermined potential difference during abnormalities of the battery (step S13: Yes), the occurrence of abnormality is notified (reporting) (reporting) ( Step S14).

  According to the battery abnormality notification device 1A including the above-described notification circuit 3A according to the embodiment of the present invention, when the battery 10 generates heat due to the abnormality, the abnormality occurrence can be immediately notified.

  FIG. 8 is a flowchart schematically showing the control content of the battery abnormality notification device 1C according to the embodiment of the present invention shown in FIG. As shown in FIG. 8, in the battery abnormality notification device 1C according to the embodiment of the present invention shown in FIG. 2, the detection unit 31 detects the potential difference between the thermoelectric conversion element 2 and the battery 10A as a heat source (step S21). ). Next, the comparison unit 32 compares the potential difference of the battery 10A of the thermoelectric conversion element 2 detected by the detection unit 31 with the predetermined potential difference of the battery during abnormal operation (step S22). The predetermined potential difference during battery abnormality is, as described above, for example, a value obtained in advance by experiments or the like, but is, for example, the potential difference when the temperature of the battery 10A is higher than room temperature by 30 ° C. or more, For example, the potential difference is 30 ° C. or more higher than that of the battery 10B adjacent to the battery 10A.

  When the potential difference of the thermoelectric conversion element 2 using the battery 10A as a heat source in the comparison unit 32 is equal to or more than the predetermined potential difference during abnormalities of the battery (step S23: Yes or step S23: No, step S26: Yes). The occurrence of an abnormality is notified (reporting) (steps S24 and S27). In the present embodiment, for example, when the temperature of the battery 10A is higher than the room temperature by 30 ° C. or more (step S23: Yes), the abnormality occurrence is notified (first step notification) (step S24), and the temperature of the battery 10A is increased. Is higher than the room temperature by 30 ° C or more (step S23: No), but the temperature of the battery 10A is higher than the temperature of the battery 10B adjacent to the battery 10A by 30 ° C or more (step S26: Yes), an abnormality occurs. Is notified (second stage notification) (step S27).

  With the battery abnormality notification device 1C according to the embodiment of the present invention described above, it is possible to immediately notify the occurrence of an abnormality when heat is generated due to an abnormality in the battery 10A. Further, when the temperature of the battery 10A is higher than room temperature by 30 ° C. or more, there is a high possibility of an abnormality due to a short circuit outside the battery 10A. On the other hand, when the temperature of the battery 10A is higher than the temperature of the battery 10B adjacent to the battery 10A by 30 ° C. or more, there is a high possibility of an abnormality due to a short circuit inside the battery 10A. Therefore, the abnormality is generated when the temperature of the battery 10A is higher than the room temperature by 30 ° C. or more and the abnormality is generated when the temperature of the battery 10A is higher than the temperature of the battery 10A adjacent to the battery 10A by 30 ° C or more. It is possible to know whether the battery 10A has an abnormality due to an external short circuit or the battery 10A has an abnormality due to an internal short circuit.

  FIG. 9 is a flowchart schematically showing the control contents of the battery abnormality notification devices 1A, 1B and 1C according to the embodiment of the present invention including the notification circuit 3C shown in FIG. As shown in FIG. 9, in the abnormality notification device 1A, 1B, 1C of the battery 10 according to the embodiment of the present invention including the notification circuit 3C shown in FIG. The potential difference used as the heat source is detected (step S31). Next, the comparing unit 32 compares the potential difference of the battery 10 of the thermoelectric conversion element 2 detected by the detecting unit 31 with the predetermined potential difference of the battery during abnormal operation (step S32). The predetermined potential difference at the time of abnormality of the battery is, for example, a value previously obtained by experiments as described above. For example, the potential difference when the temperature of the battery 10 (10A) is higher than room temperature by 30 ° C. or more. Is.

  Then, in the comparison unit 32, when the potential difference between the thermoelectric conversion element 2 and the battery 10 (10A) as a heat source is equal to or greater than a predetermined potential difference during abnormalities of the battery (step S33: Yes), the abnormality is generated in the base station 100. It is notified (a wake-up signal is issued) (step S34).

  When the base station 100 is notified of the occurrence of an abnormality, a radio wave is transmitted from the base station 100 to the communication unit 36 of the notification circuit 3. When the communication unit 36 of the notification circuit 3 receives the radio wave transmitted from the base station 100 (step S35: Yes), the potential difference using the battery 10 of the thermoelectric conversion element 2 stored in the storage unit 35 as a heat source is calculated by the calculation unit 34. The temperature of the battery 10 corresponding to the calculated potential difference using the battery 10 as a heat source and the identification information of the battery 10 are transmitted to the base station 100 (step S36). Thereby, in the base station 100, the potential difference between the battery 10 (10A) of the thermoelectric conversion element 2 stored in the storage unit 35 as a heat source and the potential difference between the battery 10 (10A) calculated by the calculation unit 34 as a heat source are handled. The temperature of the battery 10 (10A) to be activated and the identification information of the battery 10 (10A) are acquired.

  According to the battery abnormality notification devices 1A, 1B, and 1C including the notification circuit 3C described above, the storage unit 35 is provided when the communication unit 36 receives the radio wave transmitted from the base station 100. And the temperature of the battery 10 (10A) corresponding to the potential difference of which the battery 10 (10A) of the thermoelectric conversion element 2 is stored as the heat source, the potential difference of which the battery 10 (10A) is used as the heat source calculated by the calculation unit 34, and 10 (10A) identification information is transmitted to the base station 100. Therefore, in the base station 100, the temperature of the battery 10 (10A) corresponding to the potential difference of the thermoelectric conversion element 2 using the battery 10 (10A) as the heat source and the potential difference of the battery 10 (10A) calculated by the calculation unit 34 as the heat source. , And the identification information of the battery 10 (10A) can be acquired.

  The present invention is not limited to the above-described embodiment, and includes a modified form of the above-described embodiment and a combination of these forms as appropriate.

1A, 1B, 1C Battery abnormality notification device 2 Thermoelectric conversion element 2A Heat source side 2B Non-heat source side 21 p-type semiconductor 22 n-type semiconductor 3,3A, 3B, 3C Notification circuit 31 Detection unit 32 Comparison unit 33 Notification unit 34 Calculation unit 35 storage unit 36 communication unit 10, 10A, 10B battery 20 case 100 base station

Claims (6)

A thermoelectric conversion element that is connected to a battery in a heat conductive manner and that can convert heat into a potential difference using the battery as a heat source,
A notification circuit that is connected to the thermoelectric conversion element and, when a potential difference when the battery of the thermoelectric conversion element serves as a heat source is a predetermined potential difference during battery abnormality, and that notifies an abnormality occurrence,
An abnormality notification device for a battery, comprising:   The battery abnormality notification device according to claim 1, wherein the thermoelectric conversion element has a non-heat source side connected to a case accommodating the battery so as to be able to conduct heat. When the battery is an assembled battery composed of two or more batteries,
The thermoelectric conversion element has a heat source side connected to one battery in a heat conductive manner and a non-heat source side connected to another battery adjacent to the one battery in a heat conductive manner. An abnormality notification device for a battery according to. The notification circuit is
A detection unit capable of detecting a potential difference using the battery of the thermoelectric conversion element as a heat source,
A comparison unit capable of comparing the potential difference when the battery of the thermoelectric conversion element detected by the detection unit is used as a heat source and the potential difference when the predetermined battery is abnormal,
And a notification unit for notifying the occurrence of the abnormality when the potential difference of the thermoelectric conversion element using the battery as a heat source is equal to or greater than the predetermined potential difference of the battery during the abnormality in the comparison unit. Item 5. The battery abnormality notification device according to any one of Items 1 to 3. The notification circuit further includes
An operation unit capable of calculating the temperature of the battery corresponding to a potential difference with the battery of the thermoelectric conversion element detected by the detection unit as a heat source,
A potential difference between the thermoelectric conversion element detected by the detection unit and the battery as a heat source, a battery temperature corresponding to a potential difference between the thermoelectric conversion element calculated by the calculation unit and the battery as a heat source, and the battery The battery abnormality notification device according to claim 4, further comprising: a storage unit capable of storing the identification information of. The notification circuit further includes
Including a communication unit that can receive the radio waves transmitted from the base station,
When the communication unit receives a radio wave transmitted from the base station, a potential difference of the thermoelectric conversion element stored in the storage unit using the battery as a heat source, the battery calculated by the calculation unit as a heat source. The battery abnormality notification device according to claim 5, wherein the battery temperature corresponding to the potential difference and the identification information of the battery are transmitted to the base station.

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