CN201270264Y - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN201270264Y CN201270264Y CNU2008200392120U CN200820039212U CN201270264Y CN 201270264 Y CN201270264 Y CN 201270264Y CN U2008200392120 U CNU2008200392120 U CN U2008200392120U CN 200820039212 U CN200820039212 U CN 200820039212U CN 201270264 Y CN201270264 Y CN 201270264Y
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- China
- Prior art keywords
- battery
- battery pack
- batteries
- collector
- parallel connection
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- 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 - Lifetime
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- 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
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a battery group, comprising a plurality of banked battery formed by connecting battery units in parallel, wherein the battery units of each banked battery are serially connected into a plurality of serial branches; each serial branch is connected with an output terminal via an independent conductor, or each serial branch is connected with a current collector of equal current density. Compared with the prior art, the current of each serial branch will not be accumulated on the collecting bar of the banked battery, and the circuit of output part has uniform current density, to protect circuit of the collecting bar caused by high local current density under large current, thereby confirming the conformance of the battery group.
Description
Technical field
The utility model relates to a kind of battery pack, relates in particular to a kind of by adopting baby battery connection in series-parallel application can provide big electric current powerful storage battery.
Background technology
Storage battery can be used as the startup and the traction power of motor vehicles or other devices, according to the requirement of load required voltage and capacity, tends to adopt a plurality of cells to carry out the connection in series-parallel combination, improves voltage by series connection, improves capacity by parallel connection.General method is at first to adopt a bus-bar respectively all positive poles to be linked together the cell of some, with another bus-bar all negative poles is linked together again, so promptly constitutes a parallel branch.The cell of corresponding same position in a plurality of parallel branchs connected according to the both positive and negative polarity order promptly constitute a plurality of series branches, so just formed the connection in series-parallel combination of a plurality of cells.
For the both positive and negative polarity output of connection in series-parallel battery pack, existing technology generally all is directly to draw wiring from the positive bus and the negative bus-bar of two parallel branchs of head and the tail, is connected with lead-out terminal, constitutes the output of both positive and negative polarity.Patent 200510007271 adopts draws the both positive and negative polarity wiring in the bus-bar centre position, and patent 200720175854 adopts draws the both positive and negative polarity wiring at the bus-bar rightabout, and the current flow path of each cell in the parallel branch is equated.
The scheme of above-mentioned employing bus-bar does not consider that the electric current of each series branch all will output to the both positive and negative polarity lead-out terminal along bus-bar because the existence of confluxing is arranged.Therefore, along on the cross section of the each point of bus-bar length direction, electric current progressively adds up, and is near more apart from the bus-bar lead-out wire, and electric current is big more.For the application scenario of heavy-current discharge, as electric motor car, startup power supply etc., the huge electric current that this back of adding up produces can melt bus-bar, causes and opens circuit, and also can damage battery when serious.General method is with the bus-bar thickening, supposes that this battery pack need provide the electric current of N ampere, then must adopt the thick bus-bar that is not less than N ampere bearing capacity.This will make the overall weight of battery pack increase, and be unfavorable for using.
Summary of the invention
The utility model purpose provides a kind of battery pack, comprise a plurality of series branches and a plurality of parallel branch, each series branch all is connected with lead-out terminal by independent conductors, and the electric current in each series branch also all is to flow on the lead-out terminal by loop independently.Perhaps each series branch directly is connected with the collector of thickness ladder/linear change, and the thick end of collector is as lead-out terminal.Compared with prior art, the current density at battery pack extension each point place equates, can avoid causing that because of some some current density is excessive damage influences battery pack life-span and performance.
The technical solution of the utility model one is: a kind of battery pack, comprise batteries in parallel connection group by some battery unit parallel connections, battery unit corresponding between described each batteries in parallel connection group is serially connected in some series arms, and each series arm of batteries in parallel connection group is connected with lead-out terminal by independent conductor respectively.
The technical scheme one that the utility model is detailed is: a kind of battery pack, comprise batteries in parallel connection group by some battery unit parallel connections, battery unit corresponding between described each batteries in parallel connection group is serially connected in some series arms, and each series arm of batteries in parallel connection group is connected with lead-out terminal by independent conductor respectively; Electric current on each independent conductor that is connected with lead-out terminal equates or is close.
The technical solution of the utility model two is: a kind of battery pack, comprise batteries in parallel connection group by some battery unit parallel connections, battery unit corresponding between described each batteries in parallel connection group is serially connected in some series arms, and each series arm on the batteries in parallel connection group is connected with the collector of uniform current density.
The technical scheme two that the utility model is detailed is: a kind of battery pack, comprise batteries in parallel connection group by some battery unit parallel connections, battery unit corresponding between described each batteries in parallel connection group is serially connected in some series arms, and each series arm on the batteries in parallel connection group is connected with the collector of uniform current density; Stepped increase or reduce on the described collector thickness direction; Being linear on the described collector thickness direction increases or reduces; The battery pack output that described external circuit and collector thickness are bigger is connected; The direction of two battery pack outputs is opposite; Described collector is relevant with the residing position of battery with the thickness of battery pack junction, and promptly collector is d with the thickness of drawing direction the 1st battery junction farthest from electric current, and the thickness of collector and i battery junction is i * d.
The utility model advantage is: the utility model compared with prior art, the electric current in each series branch can not add up on bus-bar, can avoid causing battery pack to open circuit because of bus-bar damages under big current condition.
Description of drawings
Fig. 1 is the structural representation of prior art battery pack;
Fig. 2 is the structural representation of the utility model first embodiment;
Fig. 3 is the structural representation of the utility model second embodiment;
Fig. 4 is the structural representation of the utility model the 3rd embodiment;
Fig. 5 is the structural representation of collector among the 3rd embodiment;
Fig. 6 is the another structural representation of collector among the 3rd embodiment.
Wherein: 1 battery unit; 2 batteries in parallel connection groups; 3 series arms; 4 independent conductors; 5 bus-bars; 6 lead-out terminals; 7 conduction tie points; 8 collectors; A 9 i battery junction; 10 collector outputs; 11 the 1st battery junctions; First battery of No1; I battery of Noi.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: as shown in Figure 2 to Figure 3, a kind of battery pack, comprise batteries in parallel connection group 2 by some battery unit 1 parallel connections, battery unit 1 corresponding between described each batteries in parallel connection group 2 is serially connected in some series arms 3, each series arm 3 of batteries in parallel connection group 2 is connected with lead-out terminal 6 by independent conductor 4 respectively, and each series arm 3 on the perhaps described output batteries in parallel connection group 2 is connected with collector 8.The electric current in loop is close or equate between described each series arm 3 and the lead-out terminal 6.
Specific embodiment one:
A kind of battery pack, comprise some by the batteries in parallel connection group 2 of battery unit 1 by bus-bar 5 parallel connections, the described battery unit 1 of respectively organizing correspondence between the batteries in parallel connection group 2 is serially connected in some series arms 3, as shown in Figures 2 and 3, every row's battery unit 1 is formed batteries in parallel connection group 2, and every row battery unit 1 is formed series arm 3, and each series arm 3 on the described output batteries in parallel connection group 2 is connected with lead-out terminal 6 by independent conductor 4 respectively.Electric current between described each series arm 3 and the lead-out terminal 6 on the independent conductor is close or equate.
Described independent conductor 4 is a lead, and the resistance of each lead that links to each other with same lead-out terminal 6 is close or equal.Such as adopt the lead that resistivity * length ÷ sectional area is all identical; Make that the load current of each cell is evenly distributed in the batteries in parallel connection group 2, guarantee the consistency of battery performance.
As shown in Figure 2, independent conductor 4 links to each other with each series arm 3 end respectively.
Specific embodiment two:
A kind of battery pack, comprise some by the batteries in parallel connection group 2 of battery unit 1 by bus-bar 5 parallel connections, the described battery unit 1 of respectively organizing correspondence between the batteries in parallel connection group 2 is serially connected in some series arms 3, as shown in Figures 2 and 3, every row's battery unit 1 is formed batteries in parallel connection group 2, and every row battery unit 1 is formed series arm 3, and each series arm 3 on the described output batteries in parallel connection group 2 is connected with lead-out terminal 6 by independent conductor 4 respectively.Electric current between described each series arm 3 and the lead-out terminal 6 on the independent conductor is close or equate.
Described independent conductor 4 is a lead, and the resistance of each lead that links to each other with same lead-out terminal 6 is close or equal.Such as adopt the lead that resistivity * length ÷ sectional area is all identical; Make that the load current of each cell is evenly distributed in the batteries in parallel connection group 2, guarantee the consistency of battery performance.
Described each independent conductor 4 is connected with lead-out terminal 6 by the conduction tie point 7 that is separated from each other that is located on the bus-bar 5 respectively.As shown in Figure 3, each series arm 3 end is connected with conduction tie point 7 on the bus-bar 5 respectively, is connected with lead-out terminal 6 respectively via independent conductor 4 again.
Specific embodiment three:
A kind of battery pack, comprise some batteries in parallel connection groups 2 by battery unit 1 parallel connection, the described battery unit 1 of respectively organizing correspondence between the batteries in parallel connection group 2 is serially connected in some series arms 3, as shown in Figure 4, every row's battery unit 1 is formed batteries in parallel connection group 2, and every row battery unit 1 is formed series arm 3, and each series arm 3 on the described output batteries in parallel connection group 2 is connected with collector 8.
As shown in Figure 5, stepped increase or reduce on described collector 8 thickness directions.
As shown in Figure 6, being linear on described collector 8 thickness directions increases or reduces.
Battery pack is connected with external circuit by collector output 10.The end that described external circuit and collector 8 thickness are bigger is connected.
The direction of described positive and negative two battery pack outputs 10 is opposite.
Described collector 8 is relevant with the residing position of battery with the thickness of battery pack junction, and promptly collector 8 is d with the thickness of drawing direction the 1st battery No1 junction 11 farthest from electric current, and the thickness of collector 8 and i battery Noi junction 9 is i * d.
The utility model compared with prior art, the electric current on each series arm can be in the batteries in parallel connection group Cumulative on the bus-bar, can avoid because of bus-bar excessive electricity that causes of local current densities under big current condition Path loss badly affects battery performance.
Claims (8)
1. battery pack, comprise by some battery units (1) batteries in parallel connection group (2) in parallel, battery unit (1) corresponding between described each batteries in parallel connection group (2) is serially connected in some series arms (3), it is characterized in that: each series arm (3) of batteries in parallel connection group (2) is connected with lead-out terminal (6) by independent conductor (4) respectively.
2. battery pack according to claim 1 is characterized in that: equate with electric current on each independent conductor (4) that lead-out terminal (6) is connected or close.
3. battery pack, comprise by some battery units (1) batteries in parallel connection group (2) in parallel, battery unit (1) corresponding between described each batteries in parallel connection group (2) is serially connected in some series arms (3), and it is characterized in that: perhaps each series arm (3) on the batteries in parallel connection group (2) is connected with the collector (8) of uniform current density.
4. battery pack according to claim 3 is characterized in that: stepped increase or reduce on described collector (8) thickness direction.
5. battery pack according to claim 3 is characterized in that: being linear on described collector (8) thickness direction increases or reduces.
6. according to claim 4 or 5 described battery pack, it is characterized in that: the battery pack output (10) that described external circuit and collector (8) thickness are bigger is connected.
7. according to claim 4 or 5 described battery pack, it is characterized in that: the direction of two battery pack outputs (10) is opposite.
8. according to claim 4 or 5 described battery pack, it is characterized in that: described collector (8) is relevant with the residing position of battery with the thickness of battery pack junction, be that collector (8) is d with the thickness of drawing direction the 1st battery junction (11) farthest from electric current, collector (8) is i * d with the thickness of i battery junction (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200392120U CN201270264Y (en) | 2008-08-18 | 2008-08-18 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200392120U CN201270264Y (en) | 2008-08-18 | 2008-08-18 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201270264Y true CN201270264Y (en) | 2009-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200392120U Expired - Lifetime CN201270264Y (en) | 2008-08-18 | 2008-08-18 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201270264Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110844A (en) * | 2009-12-28 | 2011-06-29 | 三洋电机株式会社 | Power source apparatus and vehicles including same |
| CN105552286A (en) * | 2015-12-14 | 2016-05-04 | 上海动力储能电池系统工程技术有限公司 | Current sharing structure for high-capacity lithium-ion battery system |
-
2008
- 2008-08-18 CN CNU2008200392120U patent/CN201270264Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110844A (en) * | 2009-12-28 | 2011-06-29 | 三洋电机株式会社 | Power source apparatus and vehicles including same |
| CN105552286A (en) * | 2015-12-14 | 2016-05-04 | 上海动力储能电池系统工程技术有限公司 | Current sharing structure for high-capacity lithium-ion battery system |
| CN105552286B (en) * | 2015-12-14 | 2018-11-23 | 上海动力储能电池系统工程技术有限公司 | A kind of current equalizing structure of high capacity lithium ion battery system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090708 Effective date of abandoning: 20080818 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20090708 Effective date of abandoning: 20080818 |