CN219658924U - Electric connecting piece and energy storage device - Google Patents
Electric connecting piece and energy storage device Download PDFInfo
- Publication number
- CN219658924U CN219658924U CN202320353673.XU CN202320353673U CN219658924U CN 219658924 U CN219658924 U CN 219658924U CN 202320353673 U CN202320353673 U CN 202320353673U CN 219658924 U CN219658924 U CN 219658924U
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- conductive
- energy storage
- storage device
- battery pack
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- 238000004146 energy storage Methods 0.000 title claims abstract description 38
- 230000007704 transition Effects 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000001629 suppression 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
The utility model discloses an electric connector and an energy storage device. The electric connecting piece is an integral piece and comprises a middle transition area and conductive areas arranged at two sides of the middle transition area; the one side conductive area is used for being connected with the first polarity terminals of all the single batteries on one battery pack, and correspondingly, the other side conductive area is used for being connected with the second polarity terminals of all the single batteries on the other battery pack. The integrated electric connecting piece not only can realize the parallel connection of all the single batteries in the battery pack, but also can realize the series connection between two adjacent battery packs, and solves the problems that the prior energy storage equipment adopts a mode of firstly connecting in series and then connecting in series to cause the excessive electric connecting pieces and has a complex structure by adopting the energy storage device formed by the electric connection mode of firstly connecting in parallel and then connecting in series.
Description
Technical Field
The utility model belongs to the field of batteries, and particularly relates to an electric connector and an energy storage device.
Background
Currently, a common battery pack is formed by connecting a plurality of unit cells (unit cells are generally cylindrical cells or prismatic cells) together in series.
For example, chinese patent publication No. CN214589134U discloses an energy storage battery module, in which positive and negative poles of each unit battery are sequentially connected in series by using a plurality of electrical connectors; if a plurality of battery packs are needed to form the energy storage device, the plurality of battery packs are needed to be connected in parallel, and the mode can cause the problems of excessive electric connectors, complex structure and the like when the series connection and the parallel connection are realized.
Disclosure of Invention
In order to ensure that the electric connection modes among the battery packs in the energy storage device and among the single batteries in the battery packs are concise, the utility model provides an electric connector.
The electric connecting piece is an integral piece and comprises a middle transition area and conductive areas arranged at two sides of the middle transition area; the one side conductive area is used for being connected with the first polarity terminals of all the single batteries on one battery pack, and correspondingly, the other side conductive area is used for being connected with the second polarity terminals of all the single batteries on the other battery pack. The integrated electric connecting piece not only can realize the parallel connection of all the single batteries in the same battery pack, but also can realize the series connection between two adjacent battery packs, and solves the problems that the prior energy storage device adopts a mode of serial-parallel connection to cause excessive electric connecting pieces and has a complex structure by the energy storage device formed by the electric connection mode of serial-parallel connection.
Further, the conductive areas are a plurality of conductive lugs arranged at intervals, each conductive lug on one side of the conductive area is connected with one first polarity terminal or one second polarity terminal respectively, and as the conductive lugs have certain flexible deformable characteristics, when errors exist in the height direction of the battery pack, the deformation of the conductive lugs can be utilized to compensate the errors, so that the connection is more reliable; the appearance of the conductive lug can be consistent with that of the terminal on the single battery, and meanwhile, the conductive area formed by a plurality of conductive lugs arranged at intervals can ensure that the appearance of the whole electric connector is more attractive and elegant.
Further, each conductive lug is provided with at least one screw hole for fixedly connecting with the first polar terminal or the second polar terminal; compared with other welding, riveting or clamping modes, the screw connection mode is easier, and the structure is simpler.
Further, the screw holes are arranged in a strip shape, and the arrangement of the strip holes can compensate for dimension errors in the horizontal direction when a plurality of battery packs are connected in series, so that the reliability of connection is ensured.
Further, the middle transition area and the conductive areas on the two sides are in a flat plate shape, the flat plate-shaped structure is easy to process, the dimension of the battery pack in the height direction can be saved, when the plurality of battery packs form the energy storage device, the space saved in the height direction is saved, and the energy density of the whole energy storage device is improved.
In addition, the utility model also provides an energy storage device, which comprises at least two battery packs, wherein each battery pack is provided with at least two single batteries, and the energy storage device further comprises an electric connecting piece for realizing the parallel connection of the single batteries in the battery packs and the serial connection between two adjacent battery packs;
the electric connecting piece is an integral piece and comprises a middle transition area and conductive areas arranged at two sides of the middle transition area; the conductive area on one side is connected with the first polarity terminals of all the single batteries on one battery pack, and correspondingly, the conductive area on the other side is connected with the second polarity terminals of all the single batteries on the other battery pack.
Furthermore, in order to enable the heat concentrated at the pole of the single battery to be conducted out (i.e. radiated) or transfer external heat to each single battery (the temperature of each single battery needs to be raised in a low-temperature environment), the heat exchange tube is clamped on the first polarity terminal and/or the second polarity terminal, so that the heat exchange tube is tightly attached to the first polarity terminal and/or the second polarity terminal, heat exchange is facilitated, the heat exchange tube on the first polarity terminal is pressed on the first polarity terminal by the side conductive area, and the heat exchange tube on the second polarity terminal is pressed on the second polarity terminal by the side conductive area.
Further, the conductive area in the energy storage device is a plurality of conductive lugs arranged at intervals.
Further, each conductive tab of the energy storage device is fixedly connected to the first polarity terminal or the second polarity terminal by at least one screw.
Further, the through hole on each conductive lug for installing the screw is in a long strip shape.
Further, the middle transition region and the conductive regions at the two sides are in a flat plate shape.
Drawings
Fig. 1 is a perspective view of an electrical connector in embodiment 1.
Fig. 2 is a perspective view of the energy storage device in embodiment 2.
The reference numerals are as follows:
1-electric connector, 11-intermediate transition zone, 12-conductive zone, 121-conductive lug, 122-screw hole, 2-group battery, 21-unit cell, 22-first polarity terminal, 23-second polarity terminal, 24-heat exchange tube.
Detailed Description
The following will clearly and fully describe the technical solutions, it being evident that the embodiments described are only some embodiments and not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden, are within the scope of the present utility model based on the following examples.
Meanwhile, it should be noted that the positional or positional relationship indicated by the terms such as "upper, lower, inner and outer" and the like herein are based on the positional or positional relationship shown in the drawings, and are merely for convenience of description, and are not intended to indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the technical scheme. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixedly connected, detachably connected or integrally connected: it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the utility model, the single battery refers to a commercially available square lithium battery, or a similar square battery formed by connecting a plurality of soft package batteries in parallel and then putting the soft package batteries into a shell; the positive and negative poles of the single batteries are required to be arranged on the same side.
The first polar terminal and the second polar terminal are positive and negative poles on the single battery, or positive and negative connecting terminals are additionally arranged on the positive and negative poles of the single battery.
The heat exchange tube can be a water cooling tube, a copper bar or a heat tube, and is an evaporation-condensation type heat exchange device, and the heat transfer is realized by the state change of a working medium in the tube. When one end of the heat pipe is heated, the working medium in the pipe is vaporized, the vaporized steam flows to the other end, and latent heat is released to the heat dissipation area when meeting the condensation junction. The condensation heat collects the action of capillary force and gravity to flow back, and is heated and vaporized continuously, so that a great amount of heat is transferred from the heating area to the heat dissipation area by the reciprocating cycle. The heat transfer is performed by a phase change process of the working medium.
Example 1
In this embodiment, the electric connector 1 is an integral part, and through this integral electric connector 1, each single battery in the same group of batteries can be realized in parallel, and the series connection between two adjacent groups of batteries can also be realized simultaneously for when a plurality of groups of batteries form electric automobile battery package, or when a plurality of groups of batteries form energy storage device, electric connection between single batteries and between the group of batteries is succinct, practical.
As shown in fig. 1, the electrical connector 1 comprises a middle transition zone 11 and conductive zones 12 arranged on both sides of the middle transition zone; one side conductive area 12 is adapted to be connected to a first polarity terminal of all of the cells on one stack and correspondingly, the other side conductive area 12 is adapted to be connected to a second polarity terminal of all of the cells on the other stack. The integrated form of the electric connector can be formed by stamping a thin plate or laminating a plurality of thin plates. The preferable material can be aluminum sheet metal; the electric connector formed by the single metal aluminum plate pressing mode has simple manufacturing process, and the electric connector formed by the plurality of metal aluminum plates pressing mode has larger overcurrent area, but is relatively complex in manufacturing process.
The intermediate transition region 11 of the electrical connector 1 is a generally flat plate-like structure, and the conductive regions 12 on both sides may take various forms:
form 1: the conductive area 12 may be a flat plate-like structure that coincides with the extension direction of the intermediate transition area 11, so that the electrical connector 1 is rectangular overall.
Form 2: the portion of the conductive region 12 connected with the intermediate transition region 11 is arc-shaped, and the portion connected with the battery pack is plate-shaped, unlike the form 1 in which the plate-shaped structure of the portion connected with the battery pack has an arc-shaped buffer groove structure capable of playing a role in buffering.
Form 3: the conductive lugs 121 of the conductive region 12 can be distributed at intervals, and as the conductive lugs 121 are disconnected from each other, the conductive lugs 121 have certain flexible and deformable characteristics, and when errors exist in the height direction of the battery pack, the deformation of the conductive lugs can be utilized to compensate the errors, so that the connection is more reliable; the appearance of the conductive lug can be consistent with that of the terminal on the single battery, and meanwhile, the conductive area formed by a plurality of conductive lugs arranged at intervals can ensure that the appearance of the whole electric connector is more attractive and elegant.
Since the conductive region of form 3 has many advantages, this embodiment adopts the structure of form 3. More preferably: the plurality of conductive lugs 121 and the intermediate transition region 11 are integrated into a flat plate, the flat plate structure is easy to process, and the dimension of the battery pack in the height direction can be saved, so that when the plurality of battery packs form the energy storage device, the space saved in the height direction is saved, and the energy density of the whole energy storage device is improved.
In order to further increase the deformation amount, a buffer force capable of resisting external impact is provided for the battery pack, and an arc-shaped buffer groove structure can be arranged on the conductive lug.
In this embodiment, each conductive tab 121 is provided with at least one screw hole 122 for fixedly connecting with the first polarity terminal or the second polarity terminal; compared with other welding, riveting or clamping modes, the screw connection mode is easier, and the structure is simpler. More preferably: screw hole 122 in this embodiment can be set to rectangular shape, and the setting of rectangular hole can compensate the horizontal dimension error when establishing ties between a plurality of group batteries, has ensured the reliability of connection.
In this embodiment, can also set up a weak groove on every conductive lug, when the setting of weak groove can make arbitrary battery cell short circuit, the weak groove takes place the fusing rapidly under the high temperature that the heavy current produced to make battery cell disconnection electricity, avoid influencing other battery cell's normal use because of the short circuit, protected whole group battery, improved the security of group battery, and need not to repair or change whole group battery because individual battery cell damages, save cost of maintenance.
Example 2
The embodiment provides an energy storage device, which can be used as a power battery of an electric automobile and also can be used as an energy storage system of a power station.
As shown in fig. 2, the energy storage device comprises at least two battery packs 2, each battery pack 2 has at least two single batteries 21, the first polar terminal 22 or the second polar terminal 23 of each single battery 21 located on the same side is respectively clamped with a heat exchange tube 24, the heat exchange tube 24 can conduct heat concentrated on the first polar terminal 22 or the second polar terminal 23 of each single battery or transfer external heat to the single battery, and two adjacent battery packs 2 are connected through the electric connector 1 described in embodiment 1;
the plurality of conductive lugs 121 of the conductive area 12 on one side of the electrical connector 1 are respectively connected with the first polarity terminals 22 of all the single batteries on one battery pack, and correspondingly, the plurality of conductive lugs 12 on the other side are connected with the second polarity terminals 23 of all the single batteries on the other battery pack; that is, in the energy storage device of this embodiment, each unit cell in the battery pack is connected in parallel through the electrical connector, and at the same time, the adjacent battery packs are connected in series through the electrical connector.
In the existing energy storage device, each single battery in the battery pack is connected in series by adopting a plurality of connecting pieces in sequence and then connected in parallel among the battery packs by another connecting piece, so that a large number of electric connecting pieces are needed, the structure is complex, the existing energy storage device formed by serial connection and parallel connection is easy to generate a circulation phenomenon at a high voltage side, in order to inhibit the phenomenon, a special circulation inhibition device is needed, and meanwhile, the existing energy storage device also needs to be provided with a bus cabinet. The number of required electric connectors is greatly reduced compared with the existing energy storage device, and a circulation phenomenon (namely, a circulation suppression device is not needed) is not generated, and meanwhile, a bus cabinet is not needed to be additionally configured, so that compared with the existing energy storage device, the structure adopted by the electric connection mode in the energy storage device is simpler, accessories required to be additionally arranged in the whole equipment are also reduced, the system is simpler, and the manufacturing and using costs of the energy storage device adopted in the embodiment are also reduced to a certain extent under the condition of being capable of storing and providing the same electric energy.
In some embodiments, the above two electrical connectors may also be used to achieve the series connection between the battery packs, but this manner of connection significantly increases the number of electrical connectors and the number of screws required to achieve the connection and the time required for the operator to achieve the connection, and is therefore not optimal over the present embodiment.
In this embodiment, in order to make the heat exchange tube 24 tightly attached to the first polar terminal 22 and/or the second polar terminal 23, heat exchange is facilitated, the heat exchange tube 24 on the first polar terminal 22 of each unit cell 21 on one battery pack 2 is pressed against the first polar terminal 22 by each conductive tab 121 on the side conductive area 12, and similarly, the heat exchange tube 24 on the second polar terminal 23 of each unit cell 21 on another battery pack 2 is pressed against the second polar terminal 23 by each conductive tab 121 on the side conductive area 12.
But it is emphasized that: because the first polarity terminal, the second polarity terminal and the conductive lug are all conductive parts, if the heat exchange tube is a water cooling tube, the tube can be preferably made of insulating and heat conducting plastic materials; when the metal tube is selected as the water cooling tube, or the heat exchange tube is a copper tube, or the heat exchange tube is a heat tube, insulation between the heat exchange tube and the first polarity terminal, the second polarity terminal and the conductive lug needs to be considered, and the insulation mode can be to coat an insulation heat conduction layer on the heat exchange tube, or to cover an insulation heat conduction sleeve on the heat exchange tube, and the like.
Claims (11)
1. An electrical connector, characterized in that: the battery pack is used for realizing the parallel connection of all the single batteries in the same battery pack and the serial connection between two adjacent battery packs;
the electric connecting piece is an integral piece and comprises a middle transition area and conductive areas arranged at two sides of the middle transition area; the one side conductive area is used for being electrically connected with the first polarity terminals of all the single batteries on one battery pack, and correspondingly, the other side conductive area is used for being electrically connected with the second polarity terminals of all the single batteries on the other battery pack.
2. The electrical connector of claim 1, wherein: the conductive area is a plurality of conductive lugs arranged at intervals.
3. The electrical connector of claim 2, wherein: each conductive lug is provided with at least one screw hole for fixedly connecting with the first polar terminal or the second polar terminal.
4. An electrical connector as in claim 3 wherein: the screw holes are arranged in a long strip shape.
5. An electrical connector as in any one of claims 1-4 wherein: the middle transition area and the conductive areas on the two sides are positioned in the same plane, and the whole body is in a flat plate structure.
6. An energy storage device, includes two at least group battery, has two at least battery cells in every group battery, its characterized in that: the battery pack also comprises an electric connecting piece for realizing the parallel connection of all the single batteries in the battery pack and the serial connection between two adjacent battery packs;
the electric connecting piece is an integral piece and comprises a middle transition area and conductive areas arranged at two sides of the middle transition area; the conductive area on one side is connected with the first polarity terminals of all the single batteries on one battery pack, and correspondingly, the conductive area on the other side is connected with the second polarity terminals of all the single batteries on the other battery pack.
7. The energy storage device of claim 6, wherein: the heat exchange tubes are clamped on the first polar terminal and/or the second polar terminal, the heat exchange tubes on the first polar terminal are pressed on the first polar terminal by the side conductive area, and the heat exchange tubes on the second polar terminal are pressed on the second polar terminal by the side conductive area.
8. The energy storage device of claim 6 or 7, wherein: the conductive area is a plurality of conductive lugs arranged at intervals.
9. The energy storage device of claim 8, wherein: each conductive tab is fixedly connected to either the first polarity terminal or the second polarity terminal by at least one screw.
10. The energy storage device of claim 9, wherein: the through hole on each conductive lug for installing the screw is in a long strip shape.
11. The energy storage device of claim 10, wherein: the middle transition area and the conductive areas at the two sides are in a flat plate shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320353673.XU CN219658924U (en) | 2023-03-01 | 2023-03-01 | Electric connecting piece and energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320353673.XU CN219658924U (en) | 2023-03-01 | 2023-03-01 | Electric connecting piece and energy storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219658924U true CN219658924U (en) | 2023-09-08 |
Family
ID=87881437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320353673.XU Active CN219658924U (en) | 2023-03-01 | 2023-03-01 | Electric connecting piece and energy storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219658924U (en) |
-
2023
- 2023-03-01 CN CN202320353673.XU patent/CN219658924U/en active Active
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