CN203910904U - Power battery pack - Google Patents
Power battery pack Download PDFInfo
- Publication number
- CN203910904U CN203910904U CN201420273806.3U CN201420273806U CN203910904U CN 203910904 U CN203910904 U CN 203910904U CN 201420273806 U CN201420273806 U CN 201420273806U CN 203910904 U CN203910904 U CN 203910904U
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- CN
- China
- Prior art keywords
- battery pack
- power battery
- cell
- fuse
- group
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000001681 protective effect Effects 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
- Connection Of Batteries Or Terminals (AREA)
Abstract
A power battery pack comprises battery cells, a main positive pole end, fuses, a main negative pole end and protection elements used in over-current or over-temperature conditions, wherein the battery cells are divided into N groups; each of the N groups is provided with M battery cells; the number of the fuses is N; the main positive pole end, each single fuse, each group of M battery cells, and the main negative pole end are in series connection in sequence to form the connection means of 'M in series connection and N in parallel connection'; the number of the protection elements is (N-1)*M; each protection element is connected with the positive poles of two battery cells with the same relative positions of every two adjacent groups of the battery cells of the N groups; N and M are both integers greater than 1. When one or more of the battery cells of the power battery pack are in internal short-circuit, a large amount of short-circuit current flows through the protection elements, and the current-limiting function of the protection elements to the short-circuit current increases quickly, so that the short-circuit protection of the internal short-circuit battery cells and other battery cells in parallel connection with the short-circuit battery cells is realized.
Description
Technical field
The utility model relates to electrokinetic cell field, particularly relates to a kind of power battery pack.
Background technology
At present, most of motor vehicle is mainly using the internal combustion engine such as diesel engine or gasoline engine as power source, but day by day exhausted along with the non-renewable fossil energy such as oil, natural gas, and the aggravation gradually of problem of environmental pollution, people more and more favor the motor vehicle of environmental protection.Wherein, taking electric motor car (comprising: pure electric vehicle and hybrid electric vehicle) as Main Trends of The Development, and battery is the key point of electric motor car development.
The demand of high-power output while work based on electric motor car, usually use the mode of multiple monocell series and parallel connections to form battery pack and provide electric energy to electric motor car, if certain monocell in parallel connection is short-circuited, can cause other monocell electric discharge in parallel with it, easily shorten the useful life of battery pack, and fail safe reduces.
Utility model content
Based on this, be necessary to provide a kind of power battery pack of avoiding causing when a monocell short circuit other the monocell short circuit in parallel with it.
A kind of power battery pack, comprise: cell, anodal always end, fuse, negative pole always hold, for overcurrent or excess temperature being played to the protection component of metering function, described cell is divided into N group, each group in N group has M described cell, described fuse is N, described positive pole is always held, the M of single described fuse, each a group described cell, the total end of described negative pole are connected in series successively, to form the connected mode of " M string N also "; Described protection component is (N-1) * M, and the described protection component respectively positive pole of two the described cells identical with cell correspondence position described in two adjacent groups in N group connects, and wherein, N and M are the integer that is greater than 1.
In an embodiment, described protection component is the first semistor therein.
In an embodiment, described protection component is circuit breaker therein.
Therein in an embodiment, described circuit breaker comprises housing, lever arm, fixed arm, the second semistor, bimetal leaf, described lever arm has movable end and stationary end, described lever arm wear described housing sidewall so that described movable end and described stationary end lay respectively in the cavity that the sidewall of described housing surrounds and outside described housing; Described fixed arm wears the sidewall of described housing; Described the second semistor is contained in described cavity and is electrically connected with described fixed arm; Described bimetal leaf is contained in described cavity and supports and be electrically connected with described the second semistor and described lever arm respectively; Under described bimetal leaf normal temperature, in normal condition, described movable end is overlapped on described fixed arm and pierces in the part in cavity, and after described bimetal leaf is heated, in swelling state, by described lever arm jack-up, described movable end departs from described fixed arm.
In an embodiment, also comprise connector therein, described the second semistor is electrically connected with described fixed arm by described connector.
In an embodiment, described bimetal leaf is made up of electric conducting materials two-layer or that the Multi-layer thermal coefficient of expansion is different therein.
In an embodiment, between the M of described each group described cell, connect by connector therein, described connector is metal parts.
In an embodiment, described metal parts is metal wire or metal sheet therein.
In an embodiment, described protection component is connected on each corresponding described connector by the mode of wire-bonded, laser welding or resistance welded therein.
Therein in an embodiment, the cross-sectional area of described fuse is set as size more than fusing point that temperature that in situation that the cell of this fuse place group is short-circuited, described fuse rises to because of short circuit current reaches described fuse.
When one or more cell generation internal short-circuit in above-mentioned power battery pack; the short circuit current that flows through protection component is very large; protection component increases rapidly the metering function of short circuit current, thereby plays cell to there is internal short-circuit and the short-circuit protection effect of other cell in parallel with described cell.
Brief description of the drawings
Fig. 1 is the equivalent circuit diagram of the power battery pack of the utility model one specific embodiment;
Fig. 2 is a status architecture schematic diagram of the circuit breaker of protection component one embodiment shown in Fig. 1;
Fig. 3 is another status architecture schematic diagram of circuit breaker shown in Fig. 2.
Embodiment
As shown in Figure 1; it is the equivalent circuit diagram of the power battery pack 10 of the utility model one specific embodiment, comprising: cell 110, anodal total end 120, fuse 130, negative pole always hold 140, for overcurrent or excess temperature being played to the protection component 150 of metering function.
Cell is divided into 5 groups, and each group in 5 groups has 3 cells 110.Anodal total end 120, fuse 130,3 cells 110 of each group, a negative pole always hold 140 to be connected in series successively, to form the connected mode of " 3 strings 5 also ".
Protection component 150 is (5-1) * 3, i.e. 12 protection components 150.Protection component 150 connects with the positive pole of two cells 110 that in 5 groups, two adjacent groups cell 110 correspondence positions are identical respectively.
The execution mode of the power battery pack of the utility model is not limited to the power battery pack 10 shown in Fig. 1, in order to be expressly understood the inventive concept of power battery pack of the utility model, is summarized as follows:
Cell 110 is divided into N group, and each group in N group has M cell 110, and anodal total end 120, single fuse 130, M cell 110 of each group, negative pole always hold 140 to be connected in series successively, to form the connected mode of " M string N also ".Protection component 150 is (N-1) * M, and protection component 150 connects with the positive pole of two cells 110 that in N group, two adjacent groups cell 110 correspondence positions are identical respectively, and wherein, N and M are the integer that is greater than 1.
Easily understand, the power battery pack 10 shown in Fig. 1 is only the conclusion of the inventive concept of the power battery pack based on the utility model, at the equivalent circuit diagram of the next specific embodiment of condition of N=5 and M=3.Can, according to the needs of practical application, correspondingly adjust the numerical value of N and M, to form the equivalent circuit diagram of corresponding specific embodiment.
Form cell 110 of the present utility model and be preferably the secondary cell that can discharge and recharge, its kind is not particularly limited, for example, can use lithium ion battery, Ni-MH battery etc.
In the present embodiment, protection component 150 is preferably the first semistor, and in other embodiment, protection component 150 can be also circuit breaker (Breaker).
In other embodiments, between the M of each a group cell 110, connect by connector 160, connector 160 is metal parts, and this metal parts can be metal wire or metal sheet.
In the present embodiment; although in circuit theory; the two ends of protection component 150 are electrically connected with the positive pole of two cells 110 that in N family, two adjacent groups cell 110 correspondence positions are identical; but in actual applications; because protection component 150 is not easy to be directly connected on the positive pole of cell 110, so the two ends of protection component 150 are often connected on two the corresponding connectors 160 that are positioned at two cell 110 positive poles that described correspondence position is identical by the mode of wire bond, laser welding or resistance welded.
In the present embodiment; the cross-sectional area of fuse 130 is set as in situation that the cell 110 of these fuse 130 place groups is short-circuited; the temperature that fuse 130 rises to because of short circuit current reaches the size more than fusing point of fuse 130; fuse 130 in the time that the cell 110 of fuse 130 place groups is short-circuited is fused, thereby play the protective effect of the cell 110 to other group.
As shown in Figure 1, in the time that power battery pack 10 is discharged, conventionally because the potential difference of 110 of the cells of adjacency is little, so the electric current I that the directions X being connected in parallel along multiple cells 110 flows through
2numerical value very little, be typically electric current I
2numerical value be less than the electric current I that the Y-direction that is connected in series along multiple cells 110 flows through
1numerical value 1/10th.
In addition,, even if when power battery pack 10 is charged, the directions X being connected in parallel at multiple cells 110, also just eliminates the little electric current of the degree of potential difference between the cell 110 of adjacency.In addition, the result that flows through so little electric current is that the potential difference between the cell 110 of adjacency becomes less, the electric current I flowing through along directions X when power battery pack 10 is discharged
2numerical value further diminish.
Action principle how to avoid causing other cell 110 short circuits in parallel with it is described: if internal short-circuit occurs certain cell 110 while having there is internal short-circuit with certain cell 110 in the power battery pack 10 shown in Fig. 1, short circuit current is flowed through successively and is connected to the first anodal semistor and this cell 110 of this cell 110, because described short circuit current numerical value is larger, the temperature that causes the first semistor raises rapidly, and then the resistance of the first semistor is increased rapidly, short circuit current is played to metering function significantly, thereby avoid other cell 110 in parallel with this cell 110 to discharge to this cell 110, this cell 110 and other cell 110 in parallel with it are played to short-circuit protection effect simultaneously.
Be appreciated that when internal short-circuit occurs for certain several cell 110 in the power battery pack 10 of the utility model, with reference to above-mentioned action principle.
As shown in Figures 2 and 3, the two states structural representation that it is respectively the circuit breaker of protection component 150 1 embodiment shown in Fig. 1, comprising: housing 511, lever arm 512, fixed arm 513, the second semistor 514, bimetal leaf 515.Wherein lever arm 512 and fixed arm 513 adopt the good metal material of conductivity.
Lever arm 512 has movable end 5121 and stationary end 5122, lever arm 512 through the sidewall of housing 511 so that movable end 5121 and stationary end 5122 lay respectively in the cavity that the sidewall of housing 511 surrounds and outside housing 511.Fixed arm 513 is through the sidewall setting of housing 511.
The second semistor 514 is contained in described cavity and is electrically connected with fixed arm 513.
Bimetal leaf 515 is contained in described cavity and supports and be electrically connected with the second semistor 514 and lever arm 512 respectively.
As shown in Figure 2, circuit breaker is under initial condition, movable end 5121 and the fixed arm 513 of lever arm 512 offset, realize lever arm 512 and form the first conductive path with fixed arm 513, now, lever arm 512, bimetal leaf 515, the second semistor 514 and the fixed arm 513 with electric conductivity form the second conductive path successively, because the first conductive path and the second conductive path are for being connected in parallel, and the impedance of the first conductive path is less, electric current circulates via the first conductive path.
Along with the rising of circuit breaker interior environment temperature or because heating effect of current causes the rising of lever arm 512 temperature, the heat of lever arm 512 conducts to bimetal leaf 515.A kind of composite material that bimetal leaf is made up of metals two-layer or that the Multi-layer thermal coefficient of expansion is different or other electric conducting material.Due to the thermal coefficient of expansion difference of layers of material in bimetal leaf, in the time of variations in temperature, the deformation of active layers is greater than the deformation of passive layer, thereby the entirety of bimetal leaf will be to passive layer curving, thereby the curvature of this composite material changes and produces deformation.What wherein, the coefficient of expansion was higher is called active layers; What the coefficient of expansion was lower is called passive layer.But along with the expansion of bimetal leaf application and the progress of combination technology, in succession there is the bimetal leaf of three layers, four layers, five layers modern age.
As shown in Figure 3, there is deformation because expanded by heating degree is different in bimetal leaf 515, by lever arm 512 jack-up, cause movable end 5121 and fixed arm 513 in disengaged position, the first turning circuit is disconnected, thereby electric current circulates via the second conductive path, the second semistor 514 persistent fevers also conduct to bimetal leaf 515, and bimetal leaf 515 is maintained the state of lever arm 512 jack-up.
In other embodiments, circuit breaker also comprises connector 170, and connector 170 supports and is electrically connected with the second semistor 514 and fixed arm 513 respectively.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. a power battery pack, is characterized in that, comprising: cell, anodal always end, fuse, negative pole always hold, for overcurrent or excess temperature being played to the protection component of metering function,
Described cell is divided into N group, each group in N group has M described cell, described fuse is N, and described positive pole is always held, M described cell, the total end of described negative pole of single described fuse, each group are connected in series successively, to form the connected mode of " M string N also ";
Described protection component is (N-1) * M, and the described protection component respectively positive pole of two the described cells identical with cell correspondence position described in two adjacent groups in N group connects, and wherein, N and M are the integer that is greater than 1.
2. power battery pack according to claim 1, is characterized in that, described protection component is the first semistor.
3. power battery pack according to claim 1, is characterized in that, described protection component is circuit breaker.
4. power battery pack according to claim 3, is characterized in that, described circuit breaker comprises housing, lever arm, fixed arm, the second semistor, bimetal leaf,
Described lever arm has movable end and stationary end, described lever arm through the sidewall of described housing so that described movable end and described stationary end lay respectively in the cavity that the sidewall of described housing surrounds and outside described housing;
Described fixed arm is through the sidewall setting of described housing;
Described the second semistor is contained in described cavity and is electrically connected with described fixed arm;
Described bimetal leaf is contained in described cavity and supports and be electrically connected with described the second semistor and described lever arm respectively; Under described bimetal leaf normal temperature, in normal condition, described movable end is overlapped on described fixed arm and pierces in the part in cavity, and after described bimetal leaf is heated, in swelling state, by described lever arm jack-up, described movable end departs from described fixed arm.
5. power battery pack according to claim 4, is characterized in that, also comprises connector, and described connector supports and is electrically connected with described the second semistor and described fixed arm respectively.
6. power battery pack according to claim 4, is characterized in that, described bimetal leaf is made up of electric conducting materials two-layer or that the Multi-layer thermal coefficient of expansion is different.
7. power battery pack according to claim 1, is characterized in that, between the M of described each a group described cell, connects by connector, and described connector is metal parts.
8. power battery pack according to claim 7, is characterized in that, described metal parts is metal wire or metal sheet.
9. power battery pack according to claim 7, is characterized in that, described protection component is connected on each corresponding described connector by the mode of wire-bonded, laser welding or resistance welded.
10. power battery pack according to claim 1, it is characterized in that, the cross-sectional area of described fuse is set as size more than fusing point that temperature that in situation that the cell of this fuse place group is short-circuited, described fuse rises to because of short circuit current reaches described fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420273806.3U CN203910904U (en) | 2014-05-26 | 2014-05-26 | Power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420273806.3U CN203910904U (en) | 2014-05-26 | 2014-05-26 | Power battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203910904U true CN203910904U (en) | 2014-10-29 |
Family
ID=51785154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420273806.3U Expired - Lifetime CN203910904U (en) | 2014-05-26 | 2014-05-26 | Power battery pack |
Country Status (1)
| Country | Link |
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| CN (1) | CN203910904U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577212A (en) * | 2014-12-30 | 2015-04-29 | 深圳市科陆电子科技股份有限公司 | Combination structure and method of lithium battery packs |
| CN106159354A (en) * | 2015-03-25 | 2016-11-23 | 北京波士顿动力电池有限公司 | A kind of Novel power battery module safeguard construction |
| CN110800153A (en) * | 2017-12-15 | 2020-02-14 | 株式会社Lg化学 | Battery pack with improved stability |
-
2014
- 2014-05-26 CN CN201420273806.3U patent/CN203910904U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577212A (en) * | 2014-12-30 | 2015-04-29 | 深圳市科陆电子科技股份有限公司 | Combination structure and method of lithium battery packs |
| CN104577212B (en) * | 2014-12-30 | 2018-06-19 | 深圳市科陆电子科技股份有限公司 | The composite structure and method of lithium battery pack |
| CN106159354A (en) * | 2015-03-25 | 2016-11-23 | 北京波士顿动力电池有限公司 | A kind of Novel power battery module safeguard construction |
| CN110800153A (en) * | 2017-12-15 | 2020-02-14 | 株式会社Lg化学 | Battery pack with improved stability |
| CN110800153B (en) * | 2017-12-15 | 2022-12-27 | 株式会社Lg新能源 | Battery pack with improved stability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518111 Building 1, 68 Xinxia Avenue, Pinghu street, Longgang District, Shenzhen City, Guangdong Province Patentee after: Shenzhen haopeng Technology Co.,Ltd. Patentee after: Icon Energy System(ShenZhen)Co.,Ltd Patentee after: HIGHPOWER TECHNOLOGY (HUIZHOU) Co.,Ltd. Patentee after: SPRINGPOWER TECHNOLOGY (SHENZHEN) Co.,Ltd. Address before: 518111 Building 1, 68 Xinxia Avenue, Pinghu street, Longgang District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN HIGHPOWER TECHNOLOGY Co.,Ltd. Patentee before: Icon Energy System(ShenZhen)Co.,Ltd Patentee before: HIGHPOWER TECHNOLOGY (HUIZHOU) Co.,Ltd. Patentee before: SPRINGPOWER TECHNOLOGY (SHENZHEN) Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |