Managing capacitor voltage dependence
US-2024396537-A1 · Nov 28, 2024 · US
Battery pack monitoring apparatus
US9494653B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9494653-B2 |
| Application number | US-201313773200-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 21, 2013 |
| Priority date | Feb 21, 2012 |
| Publication date | Nov 15, 2016 |
| Grant date | Nov 15, 2016 |
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- Title
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Abstract
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A battery pack monitoring apparatus detects line breakage of detection lines on a highest potential side and a lowest potential side of a battery pack. In the apparatus, a battery cell voltage detection section detects a voltage of each of battery cells through detection lines connected to both electrodes of the battery cells. A battery pack voltage detection section detects a voltage of the battery pack through the highest potential side detection line and the lowest potential side detection line of the battery pack. Diodes are connected in parallel to respective battery cells on the highest and lowest potential sides in a forward direction from a negative electrode toward a positive electrode. A control section determines that one of the lines is broken when a sum of the voltage of each of the battery cells detected and the voltage of the battery pack detected are not equal to each other.
First claim
Opening claim text (preview).
What is claimed is: 1. A battery pack monitoring apparatus comprising: a battery cell voltage detection section for detecting a voltage of each of serially connected battery cells constituting a battery pack through detection lines connected to both electrodes of each of the battery cells; a battery pack voltage detection section for detecting a voltage of the battery pack through the detection line on a highest potential side of the battery pack and the detection line on a lowest potential side of the battery pack; diodes each being connected in parallel to the battery cell on the highest potential side of the battery pack and the battery cell on the lowest potential side of the battery pack in a forward direction from a negative electrode toward a positive electrode of each of the battery cells; and a line breakage determining section for determining that one of the detection line on the highest potential side and the detection line on the lowest potential side is broken when a sum of the voltage of each of the battery cells detected by the battery cell voltage detection section and the voltage of the battery pack detected by the battery pack voltage detection section are not equal to each other. 2. The battery pack monitoring apparatus according to claim 1 , wherein the line breakage determining section determines that the detection line on the highest potential side is broken when a voltage of the battery cell on the highest potential side is 0 V, and wherein the line breakage determining section determines that the detection line on the lowest potential side is broken when a voltage of the battery cell on the lowest potential side is 0 V. 3. The battery pack monitoring apparatus according to claim 1 , wherein the line breakage determining section determines that one of the detection line on the highest potential side and the detection line on the lowest potential side is broken when a difference between the sum of the voltage of each of the battery cells and the voltage of the battery pack is equal to a voltage drop value in a forward direction of each of the diodes, and wherein the line breakage determining section determines that both of the detection line on the highest potential side and the detection line on the lowest potential side are broken when the difference between the sum of the voltage of each of the battery cells and the voltage of the battery pack is equal to twice the voltage drop value in the forward direction of each of the diodes. 4. The battery pack monitoring apparatus according to claim 2 , wherein the line breakage determining section determines that one of the detection line on the highest potential side and the detection line on the lowest potential side is broken when a difference between the sum of the voltage of each of the battery cells and the voltage of the battery pack is equal to a voltage drop value in a forward direction of each of the diodes, and wherein the line breakage determining section determines that both of the detection line on the highest potential side and the detection line on the lowest potential side are broken when the difference between the sum of the voltage of each of the battery cells and the voltage of the battery pack is equal to twice the voltage drop value in the forward direction of each of the diodes.
Assignees
Inventors
Classifications
Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery · CPC title
- G01R31/3835Primary
involving only voltage measurements · CPC title
- G01R31/362Primary
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9494653B2 cover?
- A battery pack monitoring apparatus detects line breakage of detection lines on a highest potential side and a lowest potential side of a battery pack. In the apparatus, a battery cell voltage detection section detects a voltage of each of battery cells through detection lines connected to both electrodes of the battery cells. A battery pack voltage detection section detects a voltage of the ba…
- Who is the assignee on this patent?
- Okaniwa Masakazu, Kitahara Naoki, Omron Automotive Electronics
- What technology area does this patent fall under?
- Primary CPC classification G01R31/3835. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 15 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).