CN202585672U - Lithium ion battery pack - Google Patents
Lithium ion battery pack Download PDFInfo
- Publication number
- CN202585672U CN202585672U CN2012202675686U CN201220267568U CN202585672U CN 202585672 U CN202585672 U CN 202585672U CN 2012202675686 U CN2012202675686 U CN 2012202675686U CN 201220267568 U CN201220267568 U CN 201220267568U CN 202585672 U CN202585672 U CN 202585672U
- Authority
- CN
- China
- Prior art keywords
- battery pack
- pressure sensor
- lithium ion
- ion battery
- core body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 28
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to the field of a lithium battery and discloses a lithium ion battery pack. The battery pack comprises a battery pack core body, an outer package and at least one pressure sensor; the battery pack core body is formed by a plurality of unit cells which are mutually and electrically connected; a shell of each unit cell is respectively a sealed soft package shell; the battery pack core body is tightly fixed in the outer package; the pressure sensor is positioned between the battery pack core body and the outer package and is respectively abutted against the battery pack core body and the flexible package shell; and the output end of the pressure sensor is electrically connected with a lithium ion battery pack management system. Due to the application of the technical scheme, the application safety performance of the lithium ion battery pack can be effectively monitored and the potential safety hazard can be timely found.
Description
Technical Field
The utility model relates to a lithium ion battery field, in particular to lithium ion battery group.
Background
The lithium secondary battery is a new type of chemical power source and mainly consists of positive electrode, battery isolating film, negative electrode, electrolyte, casing and other parts. When the lithium ion battery is operated, lithium ions can be inserted and extracted between the positive electrode active material and the negative electrode active material.
The lithium secondary battery has the advantages of high working voltage, large specific energy density, long cycle life, low self-discharge rate, no memory effect, small environmental pollution and the like, and is rapidly applied and popularized to communication equipment, mobile electronic equipment, electric tools, electric toys and aviation models. In recent years, power type lithium secondary batteries are increasingly used in large energy storage facilities, electric bicycles, electric motorcycles, and even electric vehicles.
In recent years, due to the fact that the global warming problem is more serious, energy conservation and emission reduction are required in all countries, energy technology needs to be developed towards the direction of clean energy, and the power type battery with the largest use amount at present is a lead-acid battery which is not environment-friendly, such as a scooter, a sightseeing vehicle, a hybrid vehicle, a pure electric vehicle, energy storage equipment and the like. These will be replaced by new environmentally friendly batteries.
While lithium ion batteries are considered the best choice to replace these environmentally unfriendly batteries, this will certainly be a huge potential market. However, the requirement of the power equipment on the battery has the characteristics of high voltage, high capacity, good packaging and the like, so that a single lithium ion battery cannot meet the use requirement of all the equipment, and therefore, the single battery is required to be connected in series or in parallel or in series and parallel to form a battery pack core body meeting the requirement of the power equipment, and then the battery pack core body is packaged to form a lithium ion battery pack so as to improve the voltage, the capacity and the safety performance required by the use equipment.
In the course of studying the present invention, the present inventors found that the prior art has at least the following drawbacks:
the performance of each single battery combined into the battery pack is inconsistent, the battery with poor performance in the use process of the equipment is subjected to vicious circle, if the vicious circle reaches a certain degree, the single battery can bulge, and if the bulging single battery is continuously used, a series of unsafe factors such as short mileage, less energy storage, liquid leakage, smoke generation and the like can be brought. Therefore, when the lithium ion battery pack is used, the battery pack must be timely found and maintained before unsafe factors occur, and better application and popularization of the battery pack can be guaranteed.
Disclosure of Invention
The embodiment of the utility model provides a first aim at provides a lithium ion battery group, and it uses the security performance higher.
The embodiment of the utility model provides a pair of lithium ion battery group, include:
a battery pack core, an outer package, and at least one pressure sensor;
the battery pack core body is composed of a plurality of single batteries which are electrically connected with each other;
the shell of each single battery is a sealed soft package shell,
the battery pack core is tightly fixed within the outer package,
the pressure sensor is positioned between the battery pack core body and the outer package and respectively abutted against the battery pack core body and the soft package shell;
and the output end of the pressure sensor is electrically connected with the lithium ion battery pack management system.
Optionally, there is a plurality of said pressure sensors,
each pressure sensor is respectively positioned between each single battery and the outer package and respectively abutted against the single battery and the outer package contacted by the pressure sensor.
Optionally, the soft package shell is an aluminum-plastic film shell.
Optionally, the unit cells are electrically connected in parallel or in series with each other.
From top to bottom, use the utility model discloses technical scheme, owing to still inlayed pressure sensor between the group battery core of the lithium ion battery group of this embodiment and the extranal packing body, in case pressure sensor's atress exceeds predetermined pressure upper limit, pressure sensor sends trigger signal to BMS learns this situation, pressure sensor can receive pressure through this pressure sensor promptly and monitors whether each battery cell takes place the bloated condition in the group battery, and inform this condition to BMS, so that management and the control of group battery are carried out more effectively to BMS. Therefore, the technical scheme of the embodiment is beneficial to improving the safety performance of the lithium ion battery pack.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute a limitation of the invention, and in which:
fig. 1 is a schematic view of a connection structure between a lithium ion battery pack and a BMS provided in embodiment 1 of the present invention.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided to explain the invention, but not to limit the invention.
Example 1:
referring to fig. 1, the present embodiment provides a lithium ion battery pack, which mainly includes: the battery pack includes an exterior body 103, a battery pack body 101 configured by connecting a plurality of battery cells 1001 in series or in parallel, and at least one pressure sensor 104.
Each of the unit batteries 1001 is a pouch battery, such as a pouch battery packaged by an aluminum plastic film, the battery pack core 101 is bound or sealed and fixed by the exterior packaging body 103, and the exterior packaging body 103 may be a packaging frame having a plurality of binding bands for binding the battery pack from the outer periphery, or may be a case enclosure or the like.
The pressure sensors 104 are provided between the battery pack core 101 and the exterior body 103, and the pressure sensors 104 have a certain force acting on the battery pack core 101 and the exterior body 103, respectively, that is, the pressure sensors 104 respectively contact the battery pack core 101 and the exterior body 103 in an abutting manner, and in this embodiment, it is assumed that the pressure sensors 104 receive a pressure F0 on both sides in a normal state of each battery pack. A signal output terminal of the pressure sensor 104 is electrically connected to a Battery Management System (BMS) 102.
The operation principle of the battery pack may be that, when any single battery 1001 in the battery pack swells, external pressure is generated, the pressure is conducted through the adjacent single battery 1001 group, the whole battery pack core body 101 generates external pressure, and the pressure sensor 104 is arranged between the battery pack core body 101 and the outer packaging body 103, so that the pressure can be sensed.
And the pressure that each battery cell 1001 produces to the outside in the course of the normal charge-discharge cycle of battery pack slightly expands, is smaller than the situation that the battery cell 1001 appears to swell because of vicious circle, so the user can set up a pressure upper limit value F1 for pressure sensor 104 through practical analysis and detection, when pressure sensor 104 senses that the pressure value that this pressure sensor 104 receives is greater than or equal to this pressure upper limit value F1, pressure sensor 104 promptly to be used for to this battery pack output and input control and BMS102 send out a trigger signal, in order to inform BMS 102: the bulging condition of the single battery 1001 in the current battery pack is convenient for the BMS102 to control the lithium ion battery pack according to the trigger signal, and inform a user or an administrator that the bulging fault condition of the battery pack exists, so that the user or the administrator can troubleshoot the battery pack to avoid further deterioration of the fault and cause a safety problem.
On the other hand, an automatic management strategy can be set in BMS102, when BMS102 receives a trigger signal that the current pressure sent by pressure sensor 104 is greater than the upper pressure limit, BMS102 controls the connection in the output and input lines of the battery pack, and specifically can notify the MOS transistors in the lines thereof to interrupt the output and input of the battery pack, that is, BMS102 performs automatic power-off protection, so that a user or an administrator can troubleshoot the battery pack to avoid further deterioration of the fault and cause a safety problem.
In the present embodiment, the pressure sensor 104 provided between the battery pack core 101 and the exterior body 103 may be, but is not limited to, more than one, and is generally provided at a position where the pressure is sensed between the battery pack core 101 and the pouch case when provided, so that the pressure sensor 104 can sense the pressure between the battery pack core 101 and the pouch case more sensitively.
In addition, in this embodiment, at least one pressure sensor 104 may be disposed on the surface of each battery cell 1001 located on the outer periphery of the battery pack core 101, each pressure sensor 104 is in contact with the outer surface of the battery cell 1001 where it is located, and is also in contact with the outer packaging body 103, each pressure sensor 104 is commonly electrically connected to the BMS102, and as long as any pressure sensor 104 senses that the currently received pressure is greater than the predetermined upper pressure limit, a trigger signal is sent to the BMS102, so that the BMS102 can execute a corresponding battery pack management control strategy.
As can be seen from the above, with the technical solution of the present embodiment, since the pressure sensor 104 is further embedded between the battery pack core 101 and the outer packaging body 103 of the lithium ion battery pack of the present embodiment, once the force applied by the pressure sensor 104 exceeds the predetermined upper pressure limit, the pressure sensor 104 sends a trigger signal to the BMS102, so that the BMS102 knows the condition, that is, the pressure sensor 104 can monitor whether each battery cell 1001 in the battery pack is swelled by receiving the pressure from the pressure sensor 104, and notify the BMS102 of the situation, so that the BMS102 can more effectively perform management and control of the battery pack. Therefore, the technical scheme of the embodiment is beneficial to improving the safety performance of the lithium ion battery pack.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the description should not be construed as a limitation to the present invention.
Claims (4)
1. A lithium ion battery pack, comprising: a battery pack core, an outer package, and at least one pressure sensor; wherein,
the battery pack core body is composed of a plurality of single batteries which are electrically connected with each other;
the shell of each single battery is a sealed soft package shell,
the battery pack core is tightly fixed within the outer package,
the pressure sensor is positioned between the battery pack core body and the outer package and respectively abutted against the battery pack core body and the soft package shell;
and the output end of the pressure sensor is electrically connected with the lithium ion battery pack management system.
2. The lithium ion battery pack of claim 1,
a plurality of the pressure sensors are provided,
each pressure sensor is respectively positioned between each single battery and the outer package and respectively abutted against the single battery and the outer package contacted by the pressure sensor.
3. The lithium ion battery according to claim 1 or 2,
the soft package shell is an aluminum plastic film shell.
4. The lithium ion battery according to claim 1 or 2,
the unit cells are electrically connected in parallel or in series with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202675686U CN202585672U (en) | 2012-06-07 | 2012-06-07 | Lithium ion battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202675686U CN202585672U (en) | 2012-06-07 | 2012-06-07 | Lithium ion battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202585672U true CN202585672U (en) | 2012-12-05 |
Family
ID=47255050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202675686U Expired - Fee Related CN202585672U (en) | 2012-06-07 | 2012-06-07 | Lithium ion battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202585672U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9660301B2 (en) | 2013-10-29 | 2017-05-23 | Xiaomi Inc. | Methods and devices for battery protection |
| CN107124907A (en) * | 2015-06-10 | 2017-09-01 | 株式会社Lg 化学 | System and method for perceiving battery cell swell |
| CN112840499A (en) * | 2018-12-05 | 2021-05-25 | 喜利得股份公司 | Battery pack device and method for operating battery pack device |
| JP2023524826A (en) * | 2020-10-12 | 2023-06-13 | エルジー エナジー ソリューション リミテッド | Battery modules, battery packs, and electric vehicles |
-
2012
- 2012-06-07 CN CN2012202675686U patent/CN202585672U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9660301B2 (en) | 2013-10-29 | 2017-05-23 | Xiaomi Inc. | Methods and devices for battery protection |
| CN107124907A (en) * | 2015-06-10 | 2017-09-01 | 株式会社Lg 化学 | System and method for perceiving battery cell swell |
| US10587016B2 (en) | 2015-06-10 | 2020-03-10 | Lg Chem, Ltd. | System and method for sensing battery cell swelling |
| CN112840499A (en) * | 2018-12-05 | 2021-05-25 | 喜利得股份公司 | Battery pack device and method for operating battery pack device |
| CN112840499B (en) * | 2018-12-05 | 2023-01-10 | 喜利得股份公司 | Battery pack device and method for operating battery pack device |
| US11799123B2 (en) | 2018-12-05 | 2023-10-24 | Hilti Aktiengesellschaft | Rechargeable battery pack apparatus and method for operating the rechargeable battery pack apparatus |
| JP2023524826A (en) * | 2020-10-12 | 2023-06-13 | エルジー エナジー ソリューション リミテッド | Battery modules, battery packs, and electric vehicles |
| JP7528259B2 (en) | 2020-10-12 | 2024-08-05 | エルジー エナジー ソリューション リミテッド | Battery module, battery pack, and electric vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 26, A14 building 518110 Guangdong Province, Shenzhen city Longhua District Guanlan community library pit rich Ao Bei industrial area 2 floor A Patentee after: Haiying Science & Technology Co., Ltd., Shenzhen City Address before: Baoan District City, Guangdong province Shenzhen Guanlan street 518109 community Si Li Fu Keng Road third industrial area A2 building 4 floor B Patentee before: Haiying Science & Technology Co., Ltd., Shenzhen City |
|
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN HAIYING TECHNOLOGY CO., LTD. Free format text: FORMER NAME: HAIYING SCIENCE + TECHNOLOGY CO., LTD., SHENZHEN CITY |
|
| CP03 | Change of name, title or address |
Address after: No. 26, A14 building 518131 Guangdong Province, Shenzhen city Longhua District Guanlan community library pit rich Ao Bei industrial area 2 floor A Patentee after: SHENZHEN HAI YING TECHNOLOGY CO., LTD. Address before: No. 26, A14 building 518110 Guangdong Province, Shenzhen city Longhua District Guanlan community library pit rich Ao Bei industrial area 2 floor A Patentee before: Haiying Science & Technology Co., Ltd., Shenzhen City |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20210607 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |